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
  28 #include <linux/file.h>
  29 #include <linux/pagemap.h>
  30 #include <linux/sync_file.h>
  31 #include <linux/dma-buf.h>
  32
  33 #include <drm/amdgpu_drm.h>
  34 #include <drm/drm_syncobj.h>
  35 #include "amdgpu_cs.h"
  36 #include "amdgpu.h"
  37 #include "amdgpu_trace.h"
  38 #include "amdgpu_gmc.h"
  39 #include "amdgpu_gem.h"
  40 #include "amdgpu_ras.h"
  41
  42 static int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p,
  43                                  struct amdgpu_device *adev,
  44                                  struct drm_file *filp,
  45                                  union drm_amdgpu_cs *cs)
  46 {
  47         struct amdgpu_fpriv *fpriv = filp->driver_priv;
  48
  49         if (cs->in.num_chunks == 0)
  50                 return -EINVAL;
  51
  52         memset(p, 0, sizeof(*p));
  53         p->adev = adev;
  54         p->filp = filp;
  55
  56         p->ctx = amdgpu_ctx_get(fpriv, cs->in.ctx_id);
  57         if (!p->ctx)
  58                 return -EINVAL;
  59
  60         if (atomic_read(&p->ctx->guilty)) {
  61                 amdgpu_ctx_put(p->ctx);
  62                 return -ECANCELED;
  63         }
  64
  65         amdgpu_sync_create(&p->sync);
  66         return 0;
  67 }
  68
  69 static int amdgpu_cs_job_idx(struct amdgpu_cs_parser *p,
  70                              struct drm_amdgpu_cs_chunk_ib *chunk_ib)
  71 {
  72         struct drm_sched_entity *entity;
  73         unsigned int i;
  74         int r;
  75
  76         r = amdgpu_ctx_get_entity(p->ctx, chunk_ib->ip_type,
  77                                   chunk_ib->ip_instance,
  78                                   chunk_ib->ring, &entity);
  79         if (r)
  80                 return r;
  81
  82         /*
  83          * Abort if there is no run queue associated with this entity.
  84          * Possibly because of disabled HW IP.
  85          */
  86         if (entity->rq == NULL)
  87                 return -EINVAL;
  88
  89         /* Check if we can add this IB to some existing job */
  90         for (i = 0; i < p->gang_size; ++i)
  91                 if (p->entities[i] == entity)
  92                         return i;
  93
  94         /* If not increase the gang size if possible */
  95         if (i == AMDGPU_CS_GANG_SIZE)
  96                 return -EINVAL;
  97
  98         p->entities[i] = entity;
  99         p->gang_size = i + 1;
 100         return i;
 101 }
 102
 103 static int amdgpu_cs_p1_ib(struct amdgpu_cs_parser *p,
 104                            struct drm_amdgpu_cs_chunk_ib *chunk_ib,
 105                            unsigned int *num_ibs)
 106 {
 107         int r;
 108
 109         r = amdgpu_cs_job_idx(p, chunk_ib);
 110         if (r < 0)
 111                 return r;
 112
 113         ++(num_ibs[r]);
 114         p->gang_leader_idx = r;
 115         return 0;
 116 }
 117
 118 static int amdgpu_cs_p1_user_fence(struct amdgpu_cs_parser *p,
 119                                    struct drm_amdgpu_cs_chunk_fence *data,
 120                                    uint32_t *offset)
 121 {
 122         struct drm_gem_object *gobj;
 123         struct amdgpu_bo *bo;
 124         unsigned long size;
 125         int r;
 126
 127         gobj = drm_gem_object_lookup(p->filp, data->handle);
 128         if (gobj == NULL)
 129                 return -EINVAL;
 130
 131         bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
 132         p->uf_entry.priority = 0;
 133         p->uf_entry.tv.bo = &bo->tbo;
 134         /* One for TTM and two for the CS job */
 135         p->uf_entry.tv.num_shared = 3;
 136
 137         drm_gem_object_put(gobj);
 138
 139         size = amdgpu_bo_size(bo);
 140         if (size != PAGE_SIZE || (data->offset + 8) > size) {
 141                 r = -EINVAL;
 142                 goto error_unref;
 143         }
 144
 145         if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm)) {
 146                 r = -EINVAL;
 147                 goto error_unref;
 148         }
 149
 150         *offset = data->offset;
 151
 152         return 0;
 153
 154 error_unref:
 155         amdgpu_bo_unref(&bo);
 156         return r;
 157 }
 158
 159 static int amdgpu_cs_p1_bo_handles(struct amdgpu_cs_parser *p,
 160                                    struct drm_amdgpu_bo_list_in *data)
 161 {
 162         struct drm_amdgpu_bo_list_entry *info;
 163         int r;
 164
 165         r = amdgpu_bo_create_list_entry_array(data, &info);
 166         if (r)
 167                 return r;
 168
 169         r = amdgpu_bo_list_create(p->adev, p->filp, info, data->bo_number,
 170                                   &p->bo_list);
 171         if (r)
 172                 goto error_free;
 173
 174         kvfree(info);
 175         return 0;
 176
 177 error_free:
 178         kvfree(info);
 179
 180         return r;
 181 }
 182
 183 /* Copy the data from userspace and go over it the first time */
 184 static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
 185                            union drm_amdgpu_cs *cs)
 186 {
 187         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 188         unsigned int num_ibs[AMDGPU_CS_GANG_SIZE] = { };
 189         struct amdgpu_vm *vm = &fpriv->vm;
 190         uint64_t *chunk_array_user;
 191         uint64_t *chunk_array;
 192         uint32_t uf_offset = 0;
 193         unsigned int size;
 194         int ret;
 195         int i;
 196
 197         chunk_array = kvmalloc_array(cs->in.num_chunks, sizeof(uint64_t),
 198                                      GFP_KERNEL);
 199         if (!chunk_array)
 200                 return -ENOMEM;
 201
 202         /* get chunks */
 203         chunk_array_user = u64_to_user_ptr(cs->in.chunks);
 204         if (copy_from_user(chunk_array, chunk_array_user,
 205                            sizeof(uint64_t)*cs->in.num_chunks)) {
 206                 ret = -EFAULT;
 207                 goto free_chunk;
 208         }
 209
 210         p->nchunks = cs->in.num_chunks;
 211         p->chunks = kvmalloc_array(p->nchunks, sizeof(struct amdgpu_cs_chunk),
 212                             GFP_KERNEL);
 213         if (!p->chunks) {
 214                 ret = -ENOMEM;
 215                 goto free_chunk;
 216         }
 217
 218         for (i = 0; i < p->nchunks; i++) {
 219                 struct drm_amdgpu_cs_chunk __user **chunk_ptr = NULL;
 220                 struct drm_amdgpu_cs_chunk user_chunk;
 221                 uint32_t __user *cdata;
 222
 223                 chunk_ptr = u64_to_user_ptr(chunk_array[i]);
 224                 if (copy_from_user(&user_chunk, chunk_ptr,
 225                                        sizeof(struct drm_amdgpu_cs_chunk))) {
 226                         ret = -EFAULT;
 227                         i--;
 228                         goto free_partial_kdata;
 229                 }
 230                 p->chunks[i].chunk_id = user_chunk.chunk_id;
 231                 p->chunks[i].length_dw = user_chunk.length_dw;
 232
 233                 size = p->chunks[i].length_dw;
 234                 cdata = u64_to_user_ptr(user_chunk.chunk_data);
 235
 236                 p->chunks[i].kdata = kvmalloc_array(size, sizeof(uint32_t),
 237                                                     GFP_KERNEL);
 238                 if (p->chunks[i].kdata == NULL) {
 239                         ret = -ENOMEM;
 240                         i--;
 241                         goto free_partial_kdata;
 242                 }
 243                 size *= sizeof(uint32_t);
 244                 if (copy_from_user(p->chunks[i].kdata, cdata, size)) {
 245                         ret = -EFAULT;
 246                         goto free_partial_kdata;
 247                 }
 248
 249                 /* Assume the worst on the following checks */
 250                 ret = -EINVAL;
 251                 switch (p->chunks[i].chunk_id) {
 252                 case AMDGPU_CHUNK_ID_IB:
 253                         if (size < sizeof(struct drm_amdgpu_cs_chunk_ib))
 254                                 goto free_partial_kdata;
 255
 256                         ret = amdgpu_cs_p1_ib(p, p->chunks[i].kdata, num_ibs);
 257                         if (ret)
 258                                 goto free_partial_kdata;
 259                         break;
 260
 261                 case AMDGPU_CHUNK_ID_FENCE:
 262                         if (size < sizeof(struct drm_amdgpu_cs_chunk_fence))
 263                                 goto free_partial_kdata;
 264
 265                         ret = amdgpu_cs_p1_user_fence(p, p->chunks[i].kdata,
 266                                                       &uf_offset);
 267                         if (ret)
 268                                 goto free_partial_kdata;
 269                         break;
 270
 271                 case AMDGPU_CHUNK_ID_BO_HANDLES:
 272                         if (size < sizeof(struct drm_amdgpu_bo_list_in))
 273                                 goto free_partial_kdata;
 274
 275                         ret = amdgpu_cs_p1_bo_handles(p, p->chunks[i].kdata);
 276                         if (ret)
 277                                 goto free_partial_kdata;
 278                         break;
 279
 280                 case AMDGPU_CHUNK_ID_DEPENDENCIES:
 281                 case AMDGPU_CHUNK_ID_SYNCOBJ_IN:
 282                 case AMDGPU_CHUNK_ID_SYNCOBJ_OUT:
 283                 case AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES:
 284                 case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT:
 285                 case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL:
 286                         break;
 287
 288                 default:
 289                         goto free_partial_kdata;
 290                 }
 291         }
 292
 293         if (!p->gang_size) {
 294                 ret = -EINVAL;
 295                 goto free_partial_kdata;
 296         }
 297
 298         for (i = 0; i < p->gang_size; ++i) {
 299                 ret = amdgpu_job_alloc(p->adev, vm, p->entities[i], vm,
 300                                        num_ibs[i], &p->jobs[i]);
 301                 if (ret)
 302                         goto free_all_kdata;
 303         }
 304         p->gang_leader = p->jobs[p->gang_leader_idx];
 305
 306         if (p->ctx->vram_lost_counter != p->gang_leader->vram_lost_counter) {
 307                 ret = -ECANCELED;
 308                 goto free_all_kdata;
 309         }
 310
 311         if (p->uf_entry.tv.bo)
 312                 p->gang_leader->uf_addr = uf_offset;
 313         kvfree(chunk_array);
 314
 315         /* Use this opportunity to fill in task info for the vm */
 316         amdgpu_vm_set_task_info(vm);
 317
 318         return 0;
 319
 320 free_all_kdata:
 321         i = p->nchunks - 1;
 322 free_partial_kdata:
 323         for (; i >= 0; i--)
 324                 kvfree(p->chunks[i].kdata);
 325         kvfree(p->chunks);
 326         p->chunks = NULL;
 327         p->nchunks = 0;
 328 free_chunk:
 329         kvfree(chunk_array);
 330
 331         return ret;
 332 }
 333
 334 static int amdgpu_cs_p2_ib(struct amdgpu_cs_parser *p,
 335                            struct amdgpu_cs_chunk *chunk,
 336                            unsigned int *ce_preempt,
 337                            unsigned int *de_preempt)
 338 {
 339         struct drm_amdgpu_cs_chunk_ib *chunk_ib = chunk->kdata;
 340         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 341         struct amdgpu_vm *vm = &fpriv->vm;
 342         struct amdgpu_ring *ring;
 343         struct amdgpu_job *job;
 344         struct amdgpu_ib *ib;
 345         int r;
 346
 347         r = amdgpu_cs_job_idx(p, chunk_ib);
 348         if (r < 0)
 349                 return r;
 350
 351         job = p->jobs[r];
 352         ring = amdgpu_job_ring(job);
 353         ib = &job->ibs[job->num_ibs++];
 354
 355         /* MM engine doesn't support user fences */
 356         if (p->uf_entry.tv.bo && ring->funcs->no_user_fence)
 357                 return -EINVAL;
 358
 359         if (chunk_ib->ip_type == AMDGPU_HW_IP_GFX &&
 360             chunk_ib->flags & AMDGPU_IB_FLAG_PREEMPT) {
 361                 if (chunk_ib->flags & AMDGPU_IB_FLAG_CE)
 362                         (*ce_preempt)++;
 363                 else
 364                         (*de_preempt)++;
 365
 366                 /* Each GFX command submit allows only 1 IB max
 367                  * preemptible for CE & DE */
 368                 if (*ce_preempt > 1 || *de_preempt > 1)
 369                         return -EINVAL;
 370         }
 371
 372         if (chunk_ib->flags & AMDGPU_IB_FLAG_PREAMBLE)
 373                 job->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT;
 374
 375         r =  amdgpu_ib_get(p->adev, vm, ring->funcs->parse_cs ?
 376                            chunk_ib->ib_bytes : 0,
 377                            AMDGPU_IB_POOL_DELAYED, ib);
 378         if (r) {
 379                 DRM_ERROR("Failed to get ib !\n");
 380                 return r;
 381         }
 382
 383         ib->gpu_addr = chunk_ib->va_start;
 384         ib->length_dw = chunk_ib->ib_bytes / 4;
 385         ib->flags = chunk_ib->flags;
 386         return 0;
 387 }
 388
 389 static int amdgpu_cs_p2_dependencies(struct amdgpu_cs_parser *p,
 390                                      struct amdgpu_cs_chunk *chunk)
 391 {
 392         struct drm_amdgpu_cs_chunk_dep *deps = chunk->kdata;
 393         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 394         unsigned num_deps;
 395         int i, r;
 396
 397         num_deps = chunk->length_dw * 4 /
 398                 sizeof(struct drm_amdgpu_cs_chunk_dep);
 399
 400         for (i = 0; i < num_deps; ++i) {
 401                 struct amdgpu_ctx *ctx;
 402                 struct drm_sched_entity *entity;
 403                 struct dma_fence *fence;
 404
 405                 ctx = amdgpu_ctx_get(fpriv, deps[i].ctx_id);
 406                 if (ctx == NULL)
 407                         return -EINVAL;
 408
 409                 r = amdgpu_ctx_get_entity(ctx, deps[i].ip_type,
 410                                           deps[i].ip_instance,
 411                                           deps[i].ring, &entity);
 412                 if (r) {
 413                         amdgpu_ctx_put(ctx);
 414                         return r;
 415                 }
 416
 417                 fence = amdgpu_ctx_get_fence(ctx, entity, deps[i].handle);
 418                 amdgpu_ctx_put(ctx);
 419
 420                 if (IS_ERR(fence))
 421                         return PTR_ERR(fence);
 422                 else if (!fence)
 423                         continue;
 424
 425                 if (chunk->chunk_id == AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES) {
 426                         struct drm_sched_fence *s_fence;
 427                         struct dma_fence *old = fence;
 428
 429                         s_fence = to_drm_sched_fence(fence);
 430                         fence = dma_fence_get(&s_fence->scheduled);
 431                         dma_fence_put(old);
 432                 }
 433
 434                 r = amdgpu_sync_fence(&p->sync, fence);
 435                 dma_fence_put(fence);
 436                 if (r)
 437                         return r;
 438         }
 439         return 0;
 440 }
 441
 442 static int amdgpu_syncobj_lookup_and_add(struct amdgpu_cs_parser *p,
 443                                          uint32_t handle, u64 point,
 444                                          u64 flags)
 445 {
 446         struct dma_fence *fence;
 447         int r;
 448
 449         r = drm_syncobj_find_fence(p->filp, handle, point, flags, &fence);
 450         if (r) {
 451                 DRM_ERROR("syncobj %u failed to find fence @ %llu (%d)!\n",
 452                           handle, point, r);
 453                 return r;
 454         }
 455
 456         r = amdgpu_sync_fence(&p->sync, fence);
 457         dma_fence_put(fence);
 458         return r;
 459 }
 460
 461 static int amdgpu_cs_p2_syncobj_in(struct amdgpu_cs_parser *p,
 462                                    struct amdgpu_cs_chunk *chunk)
 463 {
 464         struct drm_amdgpu_cs_chunk_sem *deps = chunk->kdata;
 465         unsigned num_deps;
 466         int i, r;
 467
 468         num_deps = chunk->length_dw * 4 /
 469                 sizeof(struct drm_amdgpu_cs_chunk_sem);
 470         for (i = 0; i < num_deps; ++i) {
 471                 r = amdgpu_syncobj_lookup_and_add(p, deps[i].handle, 0, 0);
 472                 if (r)
 473                         return r;
 474         }
 475
 476         return 0;
 477 }
 478
 479 static int amdgpu_cs_p2_syncobj_timeline_wait(struct amdgpu_cs_parser *p,
 480                                               struct amdgpu_cs_chunk *chunk)
 481 {
 482         struct drm_amdgpu_cs_chunk_syncobj *syncobj_deps = chunk->kdata;
 483         unsigned num_deps;
 484         int i, r;
 485
 486         num_deps = chunk->length_dw * 4 /
 487                 sizeof(struct drm_amdgpu_cs_chunk_syncobj);
 488         for (i = 0; i < num_deps; ++i) {
 489                 r = amdgpu_syncobj_lookup_and_add(p, syncobj_deps[i].handle,
 490                                                   syncobj_deps[i].point,
 491                                                   syncobj_deps[i].flags);
 492                 if (r)
 493                         return r;
 494         }
 495
 496         return 0;
 497 }
 498
 499 static int amdgpu_cs_p2_syncobj_out(struct amdgpu_cs_parser *p,
 500                                     struct amdgpu_cs_chunk *chunk)
 501 {
 502         struct drm_amdgpu_cs_chunk_sem *deps = chunk->kdata;
 503         unsigned num_deps;
 504         int i;
 505
 506         num_deps = chunk->length_dw * 4 /
 507                 sizeof(struct drm_amdgpu_cs_chunk_sem);
 508
 509         if (p->post_deps)
 510                 return -EINVAL;
 511
 512         p->post_deps = kmalloc_array(num_deps, sizeof(*p->post_deps),
 513                                      GFP_KERNEL);
 514         p->num_post_deps = 0;
 515
 516         if (!p->post_deps)
 517                 return -ENOMEM;
 518
 519
 520         for (i = 0; i < num_deps; ++i) {
 521                 p->post_deps[i].syncobj =
 522                         drm_syncobj_find(p->filp, deps[i].handle);
 523                 if (!p->post_deps[i].syncobj)
 524                         return -EINVAL;
 525                 p->post_deps[i].chain = NULL;
 526                 p->post_deps[i].point = 0;
 527                 p->num_post_deps++;
 528         }
 529
 530         return 0;
 531 }
 532
 533 static int amdgpu_cs_p2_syncobj_timeline_signal(struct amdgpu_cs_parser *p,
 534                                                 struct amdgpu_cs_chunk *chunk)
 535 {
 536         struct drm_amdgpu_cs_chunk_syncobj *syncobj_deps = chunk->kdata;
 537         unsigned num_deps;
 538         int i;
 539
 540         num_deps = chunk->length_dw * 4 /
 541                 sizeof(struct drm_amdgpu_cs_chunk_syncobj);
 542
 543         if (p->post_deps)
 544                 return -EINVAL;
 545
 546         p->post_deps = kmalloc_array(num_deps, sizeof(*p->post_deps),
 547                                      GFP_KERNEL);
 548         p->num_post_deps = 0;
 549
 550         if (!p->post_deps)
 551                 return -ENOMEM;
 552
 553         for (i = 0; i < num_deps; ++i) {
 554                 struct amdgpu_cs_post_dep *dep = &p->post_deps[i];
 555
 556                 dep->chain = NULL;
 557                 if (syncobj_deps[i].point) {
 558                         dep->chain = dma_fence_chain_alloc();
 559                         if (!dep->chain)
 560                                 return -ENOMEM;
 561                 }
 562
 563                 dep->syncobj = drm_syncobj_find(p->filp,
 564                                                 syncobj_deps[i].handle);
 565                 if (!dep->syncobj) {
 566                         dma_fence_chain_free(dep->chain);
 567                         return -EINVAL;
 568                 }
 569                 dep->point = syncobj_deps[i].point;
 570                 p->num_post_deps++;
 571         }
 572
 573         return 0;
 574 }
 575
 576 static int amdgpu_cs_pass2(struct amdgpu_cs_parser *p)
 577 {
 578         unsigned int ce_preempt = 0, de_preempt = 0;
 579         int i, r;
 580
 581         for (i = 0; i < p->nchunks; ++i) {
 582                 struct amdgpu_cs_chunk *chunk;
 583
 584                 chunk = &p->chunks[i];
 585
 586                 switch (chunk->chunk_id) {
 587                 case AMDGPU_CHUNK_ID_IB:
 588                         r = amdgpu_cs_p2_ib(p, chunk, &ce_preempt, &de_preempt);
 589                         if (r)
 590                                 return r;
 591                         break;
 592                 case AMDGPU_CHUNK_ID_DEPENDENCIES:
 593                 case AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES:
 594                         r = amdgpu_cs_p2_dependencies(p, chunk);
 595                         if (r)
 596                                 return r;
 597                         break;
 598                 case AMDGPU_CHUNK_ID_SYNCOBJ_IN:
 599                         r = amdgpu_cs_p2_syncobj_in(p, chunk);
 600                         if (r)
 601                                 return r;
 602                         break;
 603                 case AMDGPU_CHUNK_ID_SYNCOBJ_OUT:
 604                         r = amdgpu_cs_p2_syncobj_out(p, chunk);
 605                         if (r)
 606                                 return r;
 607                         break;
 608                 case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT:
 609                         r = amdgpu_cs_p2_syncobj_timeline_wait(p, chunk);
 610                         if (r)
 611                                 return r;
 612                         break;
 613                 case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL:
 614                         r = amdgpu_cs_p2_syncobj_timeline_signal(p, chunk);
 615                         if (r)
 616                                 return r;
 617                         break;
 618                 }
 619         }
 620
 621         return 0;
 622 }
 623
 624 /* Convert microseconds to bytes. */
 625 static u64 us_to_bytes(struct amdgpu_device *adev, s64 us)
 626 {
 627         if (us <= 0 || !adev->mm_stats.log2_max_MBps)
 628                 return 0;
 629
 630         /* Since accum_us is incremented by a million per second, just
 631          * multiply it by the number of MB/s to get the number of bytes.
 632          */
 633         return us << adev->mm_stats.log2_max_MBps;
 634 }
 635
 636 static s64 bytes_to_us(struct amdgpu_device *adev, u64 bytes)
 637 {
 638         if (!adev->mm_stats.log2_max_MBps)
 639                 return 0;
 640
 641         return bytes >> adev->mm_stats.log2_max_MBps;
 642 }
 643
 644 /* Returns how many bytes TTM can move right now. If no bytes can be moved,
 645  * it returns 0. If it returns non-zero, it's OK to move at least one buffer,
 646  * which means it can go over the threshold once. If that happens, the driver
 647  * will be in debt and no other buffer migrations can be done until that debt
 648  * is repaid.
 649  *
 650  * This approach allows moving a buffer of any size (it's important to allow
 651  * that).
 652  *
 653  * The currency is simply time in microseconds and it increases as the clock
 654  * ticks. The accumulated microseconds (us) are converted to bytes and
 655  * returned.
 656  */
 657 static void amdgpu_cs_get_threshold_for_moves(struct amdgpu_device *adev,
 658                                               u64 *max_bytes,
 659                                               u64 *max_vis_bytes)
 660 {
 661         s64 time_us, increment_us;
 662         u64 free_vram, total_vram, used_vram;
 663         /* Allow a maximum of 200 accumulated ms. This is basically per-IB
 664          * throttling.
 665          *
 666          * It means that in order to get full max MBps, at least 5 IBs per
 667          * second must be submitted and not more than 200ms apart from each
 668          * other.
 669          */
 670         const s64 us_upper_bound = 200000;
 671
 672         if (!adev->mm_stats.log2_max_MBps) {
 673                 *max_bytes = 0;
 674                 *max_vis_bytes = 0;
 675                 return;
 676         }
 677
 678         total_vram = adev->gmc.real_vram_size - atomic64_read(&adev->vram_pin_size);
 679         used_vram = ttm_resource_manager_usage(&adev->mman.vram_mgr.manager);
 680         free_vram = used_vram >= total_vram ? 0 : total_vram - used_vram;
 681
 682         spin_lock(&adev->mm_stats.lock);
 683
 684         /* Increase the amount of accumulated us. */
 685         time_us = ktime_to_us(ktime_get());
 686         increment_us = time_us - adev->mm_stats.last_update_us;
 687         adev->mm_stats.last_update_us = time_us;
 688         adev->mm_stats.accum_us = min(adev->mm_stats.accum_us + increment_us,
 689                                       us_upper_bound);
 690
 691         /* This prevents the short period of low performance when the VRAM
 692          * usage is low and the driver is in debt or doesn't have enough
 693          * accumulated us to fill VRAM quickly.
 694          *
 695          * The situation can occur in these cases:
 696          * - a lot of VRAM is freed by userspace
 697          * - the presence of a big buffer causes a lot of evictions
 698          *   (solution: split buffers into smaller ones)
 699          *
 700          * If 128 MB or 1/8th of VRAM is free, start filling it now by setting
 701          * accum_us to a positive number.
 702          */
 703         if (free_vram >= 128 * 1024 * 1024 || free_vram >= total_vram / 8) {
 704                 s64 min_us;
 705
 706                 /* Be more aggressive on dGPUs. Try to fill a portion of free
 707                  * VRAM now.
 708                  */
 709                 if (!(adev->flags & AMD_IS_APU))
 710                         min_us = bytes_to_us(adev, free_vram / 4);
 711                 else
 712                         min_us = 0; /* Reset accum_us on APUs. */
 713
 714                 adev->mm_stats.accum_us = max(min_us, adev->mm_stats.accum_us);
 715         }
 716
 717         /* This is set to 0 if the driver is in debt to disallow (optional)
 718          * buffer moves.
 719          */
 720         *max_bytes = us_to_bytes(adev, adev->mm_stats.accum_us);
 721
 722         /* Do the same for visible VRAM if half of it is free */
 723         if (!amdgpu_gmc_vram_full_visible(&adev->gmc)) {
 724                 u64 total_vis_vram = adev->gmc.visible_vram_size;
 725                 u64 used_vis_vram =
 726                   amdgpu_vram_mgr_vis_usage(&adev->mman.vram_mgr);
 727
 728                 if (used_vis_vram < total_vis_vram) {
 729                         u64 free_vis_vram = total_vis_vram - used_vis_vram;
 730                         adev->mm_stats.accum_us_vis = min(adev->mm_stats.accum_us_vis +
 731                                                           increment_us, us_upper_bound);
 732
 733                         if (free_vis_vram >= total_vis_vram / 2)
 734                                 adev->mm_stats.accum_us_vis =
 735                                         max(bytes_to_us(adev, free_vis_vram / 2),
 736                                             adev->mm_stats.accum_us_vis);
 737                 }
 738
 739                 *max_vis_bytes = us_to_bytes(adev, adev->mm_stats.accum_us_vis);
 740         } else {
 741                 *max_vis_bytes = 0;
 742         }
 743
 744         spin_unlock(&adev->mm_stats.lock);
 745 }
 746
 747 /* Report how many bytes have really been moved for the last command
 748  * submission. This can result in a debt that can stop buffer migrations
 749  * temporarily.
 750  */
 751 void amdgpu_cs_report_moved_bytes(struct amdgpu_device *adev, u64 num_bytes,
 752                                   u64 num_vis_bytes)
 753 {
 754         spin_lock(&adev->mm_stats.lock);
 755         adev->mm_stats.accum_us -= bytes_to_us(adev, num_bytes);
 756         adev->mm_stats.accum_us_vis -= bytes_to_us(adev, num_vis_bytes);
 757         spin_unlock(&adev->mm_stats.lock);
 758 }
 759
 760 static int amdgpu_cs_bo_validate(void *param, struct amdgpu_bo *bo)
 761 {
 762         struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
 763         struct amdgpu_cs_parser *p = param;
 764         struct ttm_operation_ctx ctx = {
 765                 .interruptible = true,
 766                 .no_wait_gpu = false,
 767                 .resv = bo->tbo.base.resv
 768         };
 769         uint32_t domain;
 770         int r;
 771
 772         if (bo->tbo.pin_count)
 773                 return 0;
 774
 775         /* Don't move this buffer if we have depleted our allowance
 776          * to move it. Don't move anything if the threshold is zero.
 777          */
 778         if (p->bytes_moved < p->bytes_moved_threshold &&
 779             (!bo->tbo.base.dma_buf ||
 780             list_empty(&bo->tbo.base.dma_buf->attachments))) {
 781                 if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 782                     (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)) {
 783                         /* And don't move a CPU_ACCESS_REQUIRED BO to limited
 784                          * visible VRAM if we've depleted our allowance to do
 785                          * that.
 786                          */
 787                         if (p->bytes_moved_vis < p->bytes_moved_vis_threshold)
 788                                 domain = bo->preferred_domains;
 789                         else
 790                                 domain = bo->allowed_domains;
 791                 } else {
 792                         domain = bo->preferred_domains;
 793                 }
 794         } else {
 795                 domain = bo->allowed_domains;
 796         }
 797
 798 retry:
 799         amdgpu_bo_placement_from_domain(bo, domain);
 800         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 801
 802         p->bytes_moved += ctx.bytes_moved;
 803         if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
 804             amdgpu_bo_in_cpu_visible_vram(bo))
 805                 p->bytes_moved_vis += ctx.bytes_moved;
 806
 807         if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) {
 808                 domain = bo->allowed_domains;
 809                 goto retry;
 810         }
 811
 812         return r;
 813 }
 814
 815 static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
 816                             struct list_head *validated)
 817 {
 818         struct ttm_operation_ctx ctx = { true, false };
 819         struct amdgpu_bo_list_entry *lobj;
 820         int r;
 821
 822         list_for_each_entry(lobj, validated, tv.head) {
 823                 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(lobj->tv.bo);
 824                 struct mm_struct *usermm;
 825
 826                 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
 827                 if (usermm && usermm != current->mm)
 828                         return -EPERM;
 829
 830                 if (amdgpu_ttm_tt_is_userptr(bo->tbo.ttm) &&
 831                     lobj->user_invalidated && lobj->user_pages) {
 832                         amdgpu_bo_placement_from_domain(bo,
 833                                                         AMDGPU_GEM_DOMAIN_CPU);
 834                         r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
 835                         if (r)
 836                                 return r;
 837
 838                         amdgpu_ttm_tt_set_user_pages(bo->tbo.ttm,
 839                                                      lobj->user_pages);
 840                 }
 841
 842                 r = amdgpu_cs_bo_validate(p, bo);
 843                 if (r)
 844                         return r;
 845
 846                 kvfree(lobj->user_pages);
 847                 lobj->user_pages = NULL;
 848         }
 849         return 0;
 850 }
 851
 852 static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 853                                 union drm_amdgpu_cs *cs)
 854 {
 855         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
 856         struct amdgpu_vm *vm = &fpriv->vm;
 857         struct amdgpu_bo_list_entry *e;
 858         struct list_head duplicates;
 859         unsigned int i;
 860         int r;
 861
 862         INIT_LIST_HEAD(&p->validated);
 863
 864         /* p->bo_list could already be assigned if AMDGPU_CHUNK_ID_BO_HANDLES is present */
 865         if (cs->in.bo_list_handle) {
 866                 if (p->bo_list)
 867                         return -EINVAL;
 868
 869                 r = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle,
 870                                        &p->bo_list);
 871                 if (r)
 872                         return r;
 873         } else if (!p->bo_list) {
 874                 /* Create a empty bo_list when no handle is provided */
 875                 r = amdgpu_bo_list_create(p->adev, p->filp, NULL, 0,
 876                                           &p->bo_list);
 877                 if (r)
 878                         return r;
 879         }
 880
 881         mutex_lock(&p->bo_list->bo_list_mutex);
 882
 883         /* One for TTM and one for the CS job */
 884         amdgpu_bo_list_for_each_entry(e, p->bo_list)
 885                 e->tv.num_shared = 2;
 886
 887         amdgpu_bo_list_get_list(p->bo_list, &p->validated);
 888
 889         INIT_LIST_HEAD(&duplicates);
 890         amdgpu_vm_get_pd_bo(&fpriv->vm, &p->validated, &p->vm_pd);
 891
 892         if (p->uf_entry.tv.bo && !ttm_to_amdgpu_bo(p->uf_entry.tv.bo)->parent)
 893                 list_add(&p->uf_entry.tv.head, &p->validated);
 894
 895         /* Get userptr backing pages. If pages are updated after registered
 896          * in amdgpu_gem_userptr_ioctl(), amdgpu_cs_list_validate() will do
 897          * amdgpu_ttm_backend_bind() to flush and invalidate new pages
 898          */
 899         amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
 900                 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo);
 901                 bool userpage_invalidated = false;
 902                 int i;
 903
 904                 e->user_pages = kvmalloc_array(bo->tbo.ttm->num_pages,
 905                                         sizeof(struct page *),
 906                                         GFP_KERNEL | __GFP_ZERO);
 907                 if (!e->user_pages) {
 908                         DRM_ERROR("kvmalloc_array failure\n");
 909                         r = -ENOMEM;
 910                         goto out_free_user_pages;
 911                 }
 912
 913                 r = amdgpu_ttm_tt_get_user_pages(bo, e->user_pages, &e->range);
 914                 if (r) {
 915                         kvfree(e->user_pages);
 916                         e->user_pages = NULL;
 917                         goto out_free_user_pages;
 918                 }
 919
 920                 for (i = 0; i < bo->tbo.ttm->num_pages; i++) {
 921                         if (bo->tbo.ttm->pages[i] != e->user_pages[i]) {
 922                                 userpage_invalidated = true;
 923                                 break;
 924                         }
 925                 }
 926                 e->user_invalidated = userpage_invalidated;
 927         }
 928
 929         r = ttm_eu_reserve_buffers(&p->ticket, &p->validated, true,
 930                                    &duplicates);
 931         if (unlikely(r != 0)) {
 932                 if (r != -ERESTARTSYS)
 933                         DRM_ERROR("ttm_eu_reserve_buffers failed.\n");
 934                 goto out_free_user_pages;
 935         }
 936
 937         amdgpu_bo_list_for_each_entry(e, p->bo_list) {
 938                 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo);
 939
 940                 e->bo_va = amdgpu_vm_bo_find(vm, bo);
 941         }
 942
 943         amdgpu_cs_get_threshold_for_moves(p->adev, &p->bytes_moved_threshold,
 944                                           &p->bytes_moved_vis_threshold);
 945         p->bytes_moved = 0;
 946         p->bytes_moved_vis = 0;
 947
 948         r = amdgpu_vm_validate_pt_bos(p->adev, &fpriv->vm,
 949                                       amdgpu_cs_bo_validate, p);
 950         if (r) {
 951                 DRM_ERROR("amdgpu_vm_validate_pt_bos() failed.\n");
 952                 goto error_validate;
 953         }
 954
 955         r = amdgpu_cs_list_validate(p, &duplicates);
 956         if (r)
 957                 goto error_validate;
 958
 959         r = amdgpu_cs_list_validate(p, &p->validated);
 960         if (r)
 961                 goto error_validate;
 962
 963         if (p->uf_entry.tv.bo) {
 964                 struct amdgpu_bo *uf = ttm_to_amdgpu_bo(p->uf_entry.tv.bo);
 965
 966                 r = amdgpu_ttm_alloc_gart(&uf->tbo);
 967                 if (r)
 968                         goto error_validate;
 969
 970                 p->gang_leader->uf_addr += amdgpu_bo_gpu_offset(uf);
 971         }
 972
 973         amdgpu_cs_report_moved_bytes(p->adev, p->bytes_moved,
 974                                      p->bytes_moved_vis);
 975
 976         for (i = 0; i < p->gang_size; ++i)
 977                 amdgpu_job_set_resources(p->jobs[i], p->bo_list->gds_obj,
 978                                          p->bo_list->gws_obj,
 979                                          p->bo_list->oa_obj);
 980         return 0;
 981
 982 error_validate:
 983         ttm_eu_backoff_reservation(&p->ticket, &p->validated);
 984
 985 out_free_user_pages:
 986         amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
 987                 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo);
 988
 989                 if (!e->user_pages)
 990                         continue;
 991                 amdgpu_ttm_tt_get_user_pages_done(bo->tbo.ttm, e->range);
 992                 kvfree(e->user_pages);
 993                 e->user_pages = NULL;
 994                 e->range = NULL;
 995         }
 996         mutex_unlock(&p->bo_list->bo_list_mutex);
 997         return r;
 998 }
 999
1000 static void trace_amdgpu_cs_ibs(struct amdgpu_cs_parser *p)
1001 {
1002         int i, j;
1003
1004         if (!trace_amdgpu_cs_enabled())
1005                 return;
1006
1007         for (i = 0; i < p->gang_size; ++i) {
1008                 struct amdgpu_job *job = p->jobs[i];
1009
1010                 for (j = 0; j < job->num_ibs; ++j)
1011                         trace_amdgpu_cs(p, job, &job->ibs[j]);
1012         }
1013 }
1014
1015 static int amdgpu_cs_patch_ibs(struct amdgpu_cs_parser *p,
1016                                struct amdgpu_job *job)
1017 {
1018         struct amdgpu_ring *ring = amdgpu_job_ring(job);
1019         unsigned int i;
1020         int r;
1021
1022         /* Only for UVD/VCE VM emulation */
1023         if (!ring->funcs->parse_cs && !ring->funcs->patch_cs_in_place)
1024                 return 0;
1025
1026         for (i = 0; i < job->num_ibs; ++i) {
1027                 struct amdgpu_ib *ib = &job->ibs[i];
1028                 struct amdgpu_bo_va_mapping *m;
1029                 struct amdgpu_bo *aobj;
1030                 uint64_t va_start;
1031                 uint8_t *kptr;
1032
1033                 va_start = ib->gpu_addr & AMDGPU_GMC_HOLE_MASK;
1034                 r = amdgpu_cs_find_mapping(p, va_start, &aobj, &m);
1035                 if (r) {
1036                         DRM_ERROR("IB va_start is invalid\n");
1037                         return r;
1038                 }
1039
1040                 if ((va_start + ib->length_dw * 4) >
1041                     (m->last + 1) * AMDGPU_GPU_PAGE_SIZE) {
1042                         DRM_ERROR("IB va_start+ib_bytes is invalid\n");
1043                         return -EINVAL;
1044                 }
1045
1046                 /* the IB should be reserved at this point */
1047                 r = amdgpu_bo_kmap(aobj, (void **)&kptr);
1048                 if (r) {
1049                         return r;
1050                 }
1051
1052                 kptr += va_start - (m->start * AMDGPU_GPU_PAGE_SIZE);
1053
1054                 if (ring->funcs->parse_cs) {
1055                         memcpy(ib->ptr, kptr, ib->length_dw * 4);
1056                         amdgpu_bo_kunmap(aobj);
1057
1058                         r = amdgpu_ring_parse_cs(ring, p, job, ib);
1059                         if (r)
1060                                 return r;
1061                 } else {
1062                         ib->ptr = (uint32_t *)kptr;
1063                         r = amdgpu_ring_patch_cs_in_place(ring, p, job, ib);
1064                         amdgpu_bo_kunmap(aobj);
1065                         if (r)
1066                                 return r;
1067                 }
1068         }
1069
1070         return 0;
1071 }
1072
1073 static int amdgpu_cs_patch_jobs(struct amdgpu_cs_parser *p)
1074 {
1075         unsigned int i;
1076         int r;
1077
1078         for (i = 0; i < p->gang_size; ++i) {
1079                 r = amdgpu_cs_patch_ibs(p, p->jobs[i]);
1080                 if (r)
1081                         return r;
1082         }
1083         return 0;
1084 }
1085
1086 static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
1087 {
1088         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
1089         struct amdgpu_job *job = p->gang_leader;
1090         struct amdgpu_device *adev = p->adev;
1091         struct amdgpu_vm *vm = &fpriv->vm;
1092         struct amdgpu_bo_list_entry *e;
1093         struct amdgpu_bo_va *bo_va;
1094         struct amdgpu_bo *bo;
1095         unsigned int i;
1096         int r;
1097
1098         r = amdgpu_vm_clear_freed(adev, vm, NULL);
1099         if (r)
1100                 return r;
1101
1102         r = amdgpu_vm_bo_update(adev, fpriv->prt_va, false);
1103         if (r)
1104                 return r;
1105
1106         r = amdgpu_sync_fence(&p->sync, fpriv->prt_va->last_pt_update);
1107         if (r)
1108                 return r;
1109
1110         if (fpriv->csa_va) {
1111                 bo_va = fpriv->csa_va;
1112                 BUG_ON(!bo_va);
1113                 r = amdgpu_vm_bo_update(adev, bo_va, false);
1114                 if (r)
1115                         return r;
1116
1117                 r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update);
1118                 if (r)
1119                         return r;
1120         }
1121
1122         amdgpu_bo_list_for_each_entry(e, p->bo_list) {
1123                 /* ignore duplicates */
1124                 bo = ttm_to_amdgpu_bo(e->tv.bo);
1125                 if (!bo)
1126                         continue;
1127
1128                 bo_va = e->bo_va;
1129                 if (bo_va == NULL)
1130                         continue;
1131
1132                 r = amdgpu_vm_bo_update(adev, bo_va, false);
1133                 if (r)
1134                         return r;
1135
1136                 r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update);
1137                 if (r)
1138                         return r;
1139         }
1140
1141         r = amdgpu_vm_handle_moved(adev, vm);
1142         if (r)
1143                 return r;
1144
1145         r = amdgpu_vm_update_pdes(adev, vm, false);
1146         if (r)
1147                 return r;
1148
1149         r = amdgpu_sync_fence(&p->sync, vm->last_update);
1150         if (r)
1151                 return r;
1152
1153         for (i = 0; i < p->gang_size; ++i) {
1154                 job = p->jobs[i];
1155
1156                 if (!job->vm)
1157                         continue;
1158
1159                 job->vm_pd_addr = amdgpu_gmc_pd_addr(vm->root.bo);
1160         }
1161
1162         if (amdgpu_vm_debug) {
1163                 /* Invalidate all BOs to test for userspace bugs */
1164                 amdgpu_bo_list_for_each_entry(e, p->bo_list) {
1165                         struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo);
1166
1167                         /* ignore duplicates */
1168                         if (!bo)
1169                                 continue;
1170
1171                         amdgpu_vm_bo_invalidate(adev, bo, false);
1172                 }
1173         }
1174
1175         return 0;
1176 }
1177
1178 static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
1179 {
1180         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
1181         struct drm_gpu_scheduler *sched;
1182         struct amdgpu_bo_list_entry *e;
1183         struct dma_fence *fence;
1184         unsigned int i;
1185         int r;
1186
1187         r = amdgpu_ctx_wait_prev_fence(p->ctx, p->entities[p->gang_leader_idx]);
1188         if (r) {
1189                 if (r != -ERESTARTSYS)
1190                         DRM_ERROR("amdgpu_ctx_wait_prev_fence failed.\n");
1191                 return r;
1192         }
1193
1194         list_for_each_entry(e, &p->validated, tv.head) {
1195                 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo);
1196                 struct dma_resv *resv = bo->tbo.base.resv;
1197                 enum amdgpu_sync_mode sync_mode;
1198
1199                 sync_mode = amdgpu_bo_explicit_sync(bo) ?
1200                         AMDGPU_SYNC_EXPLICIT : AMDGPU_SYNC_NE_OWNER;
1201                 r = amdgpu_sync_resv(p->adev, &p->sync, resv, sync_mode,
1202                                      &fpriv->vm);
1203                 if (r)
1204                         return r;
1205         }
1206
1207         for (i = 0; i < p->gang_size; ++i) {
1208                 r = amdgpu_sync_push_to_job(&p->sync, p->jobs[i]);
1209                 if (r)
1210                         return r;
1211         }
1212
1213         sched = p->gang_leader->base.entity->rq->sched;
1214         while ((fence = amdgpu_sync_get_fence(&p->sync))) {
1215                 struct drm_sched_fence *s_fence = to_drm_sched_fence(fence);
1216
1217                 /*
1218                  * When we have an dependency it might be necessary to insert a
1219                  * pipeline sync to make sure that all caches etc are flushed and the
1220                  * next job actually sees the results from the previous one
1221                  * before we start executing on the same scheduler ring.
1222                  */
1223                 if (!s_fence || s_fence->sched != sched)
1224                         continue;
1225
1226                 r = amdgpu_sync_fence(&p->gang_leader->explicit_sync, fence);
1227                 if (r)
1228                         return r;
1229         }
1230         return 0;
1231 }
1232
1233 static void amdgpu_cs_post_dependencies(struct amdgpu_cs_parser *p)
1234 {
1235         int i;
1236
1237         for (i = 0; i < p->num_post_deps; ++i) {
1238                 if (p->post_deps[i].chain && p->post_deps[i].point) {
1239                         drm_syncobj_add_point(p->post_deps[i].syncobj,
1240                                               p->post_deps[i].chain,
1241                                               p->fence, p->post_deps[i].point);
1242                         p->post_deps[i].chain = NULL;
1243                 } else {
1244                         drm_syncobj_replace_fence(p->post_deps[i].syncobj,
1245                                                   p->fence);
1246                 }
1247         }
1248 }
1249
1250 static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
1251                             union drm_amdgpu_cs *cs)
1252 {
1253         struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
1254         struct amdgpu_job *leader = p->gang_leader;
1255         struct amdgpu_bo_list_entry *e;
1256         unsigned int i;
1257         uint64_t seq;
1258         int r;
1259
1260         for (i = 0; i < p->gang_size; ++i)
1261                 drm_sched_job_arm(&p->jobs[i]->base);
1262
1263         for (i = 0; i < p->gang_size; ++i) {
1264                 struct dma_fence *fence;
1265
1266                 if (p->jobs[i] == leader)
1267                         continue;
1268
1269                 fence = &p->jobs[i]->base.s_fence->scheduled;
1270                 dma_fence_get(fence);
1271                 r = drm_sched_job_add_dependency(&leader->base, fence);
1272                 if (r) {
1273                         dma_fence_put(fence);
1274                         goto error_cleanup;
1275                 }
1276         }
1277
1278         if (p->gang_size > 1) {
1279                 for (i = 0; i < p->gang_size; ++i)
1280                         amdgpu_job_set_gang_leader(p->jobs[i], leader);
1281         }
1282
1283         /* No memory allocation is allowed while holding the notifier lock.
1284          * The lock is held until amdgpu_cs_submit is finished and fence is
1285          * added to BOs.
1286          */
1287         mutex_lock(&p->adev->notifier_lock);
1288
1289         /* If userptr are invalidated after amdgpu_cs_parser_bos(), return
1290          * -EAGAIN, drmIoctl in libdrm will restart the amdgpu_cs_ioctl.
1291          */
1292         r = 0;
1293         amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
1294                 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo);
1295
1296                 r |= !amdgpu_ttm_tt_get_user_pages_done(bo->tbo.ttm, e->range);
1297                 e->range = NULL;
1298         }
1299         if (r) {
1300                 r = -EAGAIN;
1301                 goto error_unlock;
1302         }
1303
1304         p->fence = dma_fence_get(&leader->base.s_fence->finished);
1305         list_for_each_entry(e, &p->validated, tv.head) {
1306
1307                 /* Everybody except for the gang leader uses READ */
1308                 for (i = 0; i < p->gang_size; ++i) {
1309                         if (p->jobs[i] == leader)
1310                                 continue;
1311
1312                         dma_resv_add_fence(e->tv.bo->base.resv,
1313                                            &p->jobs[i]->base.s_fence->finished,
1314                                            DMA_RESV_USAGE_READ);
1315                 }
1316
1317                 /* The gang leader is remembered as writer */
1318                 e->tv.num_shared = 0;
1319         }
1320
1321         seq = amdgpu_ctx_add_fence(p->ctx, p->entities[p->gang_leader_idx],
1322                                    p->fence);
1323         amdgpu_cs_post_dependencies(p);
1324
1325         if ((leader->preamble_status & AMDGPU_PREAMBLE_IB_PRESENT) &&
1326             !p->ctx->preamble_presented) {
1327                 leader->preamble_status |= AMDGPU_PREAMBLE_IB_PRESENT_FIRST;
1328                 p->ctx->preamble_presented = true;
1329         }
1330
1331         cs->out.handle = seq;
1332         leader->uf_sequence = seq;
1333
1334         amdgpu_vm_bo_trace_cs(&fpriv->vm, &p->ticket);
1335         for (i = 0; i < p->gang_size; ++i) {
1336                 amdgpu_job_free_resources(p->jobs[i]);
1337                 trace_amdgpu_cs_ioctl(p->jobs[i]);
1338                 drm_sched_entity_push_job(&p->jobs[i]->base);
1339                 p->jobs[i] = NULL;
1340         }
1341
1342         amdgpu_vm_move_to_lru_tail(p->adev, &fpriv->vm);
1343         ttm_eu_fence_buffer_objects(&p->ticket, &p->validated, p->fence);
1344
1345         mutex_unlock(&p->adev->notifier_lock);
1346         mutex_unlock(&p->bo_list->bo_list_mutex);
1347         return 0;
1348
1349 error_unlock:
1350         mutex_unlock(&p->adev->notifier_lock);
1351
1352 error_cleanup:
1353         for (i = 0; i < p->gang_size; ++i)
1354                 drm_sched_job_cleanup(&p->jobs[i]->base);
1355         return r;
1356 }
1357
1358 /* Cleanup the parser structure */
1359 static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser)
1360 {
1361         unsigned i;
1362
1363         amdgpu_sync_free(&parser->sync);
1364         for (i = 0; i < parser->num_post_deps; i++) {
1365                 drm_syncobj_put(parser->post_deps[i].syncobj);
1366                 kfree(parser->post_deps[i].chain);
1367         }
1368         kfree(parser->post_deps);
1369
1370         dma_fence_put(parser->fence);
1371
1372         if (parser->ctx)
1373                 amdgpu_ctx_put(parser->ctx);
1374         if (parser->bo_list)
1375                 amdgpu_bo_list_put(parser->bo_list);
1376
1377         for (i = 0; i < parser->nchunks; i++)
1378                 kvfree(parser->chunks[i].kdata);
1379         kvfree(parser->chunks);
1380         for (i = 0; i < parser->gang_size; ++i) {
1381                 if (parser->jobs[i])
1382                         amdgpu_job_free(parser->jobs[i]);
1383         }
1384         if (parser->uf_entry.tv.bo) {
1385                 struct amdgpu_bo *uf = ttm_to_amdgpu_bo(parser->uf_entry.tv.bo);
1386
1387                 amdgpu_bo_unref(&uf);
1388         }
1389 }
1390
1391 int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
1392 {
1393         struct amdgpu_device *adev = drm_to_adev(dev);
1394         struct amdgpu_cs_parser parser;
1395         int r;
1396
1397         if (amdgpu_ras_intr_triggered())
1398                 return -EHWPOISON;
1399
1400         if (!adev->accel_working)
1401                 return -EBUSY;
1402
1403         r = amdgpu_cs_parser_init(&parser, adev, filp, data);
1404         if (r) {
1405                 if (printk_ratelimit())
1406                         DRM_ERROR("Failed to initialize parser %d!\n", r);
1407                 return r;
1408         }
1409
1410         r = amdgpu_cs_pass1(&parser, data);
1411         if (r)
1412                 goto error_fini;
1413
1414         r = amdgpu_cs_pass2(&parser);
1415         if (r)
1416                 goto error_fini;
1417
1418         r = amdgpu_cs_parser_bos(&parser, data);
1419         if (r) {
1420                 if (r == -ENOMEM)
1421                         DRM_ERROR("Not enough memory for command submission!\n");
1422                 else if (r != -ERESTARTSYS && r != -EAGAIN)
1423                         DRM_ERROR("Failed to process the buffer list %d!\n", r);
1424                 goto error_fini;
1425         }
1426
1427         r = amdgpu_cs_patch_jobs(&parser);
1428         if (r)
1429                 goto error_backoff;
1430
1431         r = amdgpu_cs_vm_handling(&parser);
1432         if (r)
1433                 goto error_backoff;
1434
1435         r = amdgpu_cs_sync_rings(&parser);
1436         if (r)
1437                 goto error_backoff;
1438
1439         trace_amdgpu_cs_ibs(&parser);
1440
1441         r = amdgpu_cs_submit(&parser, data);
1442         if (r)
1443                 goto error_backoff;
1444
1445         amdgpu_cs_parser_fini(&parser);
1446         return 0;
1447
1448 error_backoff:
1449         ttm_eu_backoff_reservation(&parser.ticket, &parser.validated);
1450         mutex_unlock(&parser.bo_list->bo_list_mutex);
1451
1452 error_fini:
1453         amdgpu_cs_parser_fini(&parser);
1454         return r;
1455 }
1456
1457 /**
1458  * amdgpu_cs_wait_ioctl - wait for a command submission to finish
1459  *
1460  * @dev: drm device
1461  * @data: data from userspace
1462  * @filp: file private
1463  *
1464  * Wait for the command submission identified by handle to finish.
1465  */
1466 int amdgpu_cs_wait_ioctl(struct drm_device *dev, void *data,
1467                          struct drm_file *filp)
1468 {
1469         union drm_amdgpu_wait_cs *wait = data;
1470         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout);
1471         struct drm_sched_entity *entity;
1472         struct amdgpu_ctx *ctx;
1473         struct dma_fence *fence;
1474         long r;
1475
1476         ctx = amdgpu_ctx_get(filp->driver_priv, wait->in.ctx_id);
1477         if (ctx == NULL)
1478                 return -EINVAL;
1479
1480         r = amdgpu_ctx_get_entity(ctx, wait->in.ip_type, wait->in.ip_instance,
1481                                   wait->in.ring, &entity);
1482         if (r) {
1483                 amdgpu_ctx_put(ctx);
1484                 return r;
1485         }
1486
1487         fence = amdgpu_ctx_get_fence(ctx, entity, wait->in.handle);
1488         if (IS_ERR(fence))
1489                 r = PTR_ERR(fence);
1490         else if (fence) {
1491                 r = dma_fence_wait_timeout(fence, true, timeout);
1492                 if (r > 0 && fence->error)
1493                         r = fence->error;
1494                 dma_fence_put(fence);
1495         } else
1496                 r = 1;
1497
1498         amdgpu_ctx_put(ctx);
1499         if (r < 0)
1500                 return r;
1501
1502         memset(wait, 0, sizeof(*wait));
1503         wait->out.status = (r == 0);
1504
1505         return 0;
1506 }
1507
1508 /**
1509  * amdgpu_cs_get_fence - helper to get fence from drm_amdgpu_fence
1510  *
1511  * @adev: amdgpu device
1512  * @filp: file private
1513  * @user: drm_amdgpu_fence copied from user space
1514  */
1515 static struct dma_fence *amdgpu_cs_get_fence(struct amdgpu_device *adev,
1516                                              struct drm_file *filp,
1517                                              struct drm_amdgpu_fence *user)
1518 {
1519         struct drm_sched_entity *entity;
1520         struct amdgpu_ctx *ctx;
1521         struct dma_fence *fence;
1522         int r;
1523
1524         ctx = amdgpu_ctx_get(filp->driver_priv, user->ctx_id);
1525         if (ctx == NULL)
1526                 return ERR_PTR(-EINVAL);
1527
1528         r = amdgpu_ctx_get_entity(ctx, user->ip_type, user->ip_instance,
1529                                   user->ring, &entity);
1530         if (r) {
1531                 amdgpu_ctx_put(ctx);
1532                 return ERR_PTR(r);
1533         }
1534
1535         fence = amdgpu_ctx_get_fence(ctx, entity, user->seq_no);
1536         amdgpu_ctx_put(ctx);
1537
1538         return fence;
1539 }
1540
1541 int amdgpu_cs_fence_to_handle_ioctl(struct drm_device *dev, void *data,
1542                                     struct drm_file *filp)
1543 {
1544         struct amdgpu_device *adev = drm_to_adev(dev);
1545         union drm_amdgpu_fence_to_handle *info = data;
1546         struct dma_fence *fence;
1547         struct drm_syncobj *syncobj;
1548         struct sync_file *sync_file;
1549         int fd, r;
1550
1551         fence = amdgpu_cs_get_fence(adev, filp, &info->in.fence);
1552         if (IS_ERR(fence))
1553                 return PTR_ERR(fence);
1554
1555         if (!fence)
1556                 fence = dma_fence_get_stub();
1557
1558         switch (info->in.what) {
1559         case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ:
1560                 r = drm_syncobj_create(&syncobj, 0, fence);
1561                 dma_fence_put(fence);
1562                 if (r)
1563                         return r;
1564                 r = drm_syncobj_get_handle(filp, syncobj, &info->out.handle);
1565                 drm_syncobj_put(syncobj);
1566                 return r;
1567
1568         case AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD:
1569                 r = drm_syncobj_create(&syncobj, 0, fence);
1570                 dma_fence_put(fence);
1571                 if (r)
1572                         return r;
1573                 r = drm_syncobj_get_fd(syncobj, (int *)&info->out.handle);
1574                 drm_syncobj_put(syncobj);
1575                 return r;
1576
1577         case AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD:
1578                 fd = get_unused_fd_flags(O_CLOEXEC);
1579                 if (fd < 0) {
1580                         dma_fence_put(fence);
1581                         return fd;
1582                 }
1583
1584                 sync_file = sync_file_create(fence);
1585                 dma_fence_put(fence);
1586                 if (!sync_file) {
1587                         put_unused_fd(fd);
1588                         return -ENOMEM;
1589                 }
1590
1591                 fd_install(fd, sync_file->file);
1592                 info->out.handle = fd;
1593                 return 0;
1594
1595         default:
1596                 dma_fence_put(fence);
1597                 return -EINVAL;
1598         }
1599 }
1600
1601 /**
1602  * amdgpu_cs_wait_all_fences - wait on all fences to signal
1603  *
1604  * @adev: amdgpu device
1605  * @filp: file private
1606  * @wait: wait parameters
1607  * @fences: array of drm_amdgpu_fence
1608  */
1609 static int amdgpu_cs_wait_all_fences(struct amdgpu_device *adev,
1610                                      struct drm_file *filp,
1611                                      union drm_amdgpu_wait_fences *wait,
1612                                      struct drm_amdgpu_fence *fences)
1613 {
1614         uint32_t fence_count = wait->in.fence_count;
1615         unsigned int i;
1616         long r = 1;
1617
1618         for (i = 0; i < fence_count; i++) {
1619                 struct dma_fence *fence;
1620                 unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1621
1622                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1623                 if (IS_ERR(fence))
1624                         return PTR_ERR(fence);
1625                 else if (!fence)
1626                         continue;
1627
1628                 r = dma_fence_wait_timeout(fence, true, timeout);
1629                 dma_fence_put(fence);
1630                 if (r < 0)
1631                         return r;
1632
1633                 if (r == 0)
1634                         break;
1635
1636                 if (fence->error)
1637                         return fence->error;
1638         }
1639
1640         memset(wait, 0, sizeof(*wait));
1641         wait->out.status = (r > 0);
1642
1643         return 0;
1644 }
1645
1646 /**
1647  * amdgpu_cs_wait_any_fence - wait on any fence to signal
1648  *
1649  * @adev: amdgpu device
1650  * @filp: file private
1651  * @wait: wait parameters
1652  * @fences: array of drm_amdgpu_fence
1653  */
1654 static int amdgpu_cs_wait_any_fence(struct amdgpu_device *adev,
1655                                     struct drm_file *filp,
1656                                     union drm_amdgpu_wait_fences *wait,
1657                                     struct drm_amdgpu_fence *fences)
1658 {
1659         unsigned long timeout = amdgpu_gem_timeout(wait->in.timeout_ns);
1660         uint32_t fence_count = wait->in.fence_count;
1661         uint32_t first = ~0;
1662         struct dma_fence **array;
1663         unsigned int i;
1664         long r;
1665
1666         /* Prepare the fence array */
1667         array = kcalloc(fence_count, sizeof(struct dma_fence *), GFP_KERNEL);
1668
1669         if (array == NULL)
1670                 return -ENOMEM;
1671
1672         for (i = 0; i < fence_count; i++) {
1673                 struct dma_fence *fence;
1674
1675                 fence = amdgpu_cs_get_fence(adev, filp, &fences[i]);
1676                 if (IS_ERR(fence)) {
1677                         r = PTR_ERR(fence);
1678                         goto err_free_fence_array;
1679                 } else if (fence) {
1680                         array[i] = fence;
1681                 } else { /* NULL, the fence has been already signaled */
1682                         r = 1;
1683                         first = i;
1684                         goto out;
1685                 }
1686         }
1687
1688         r = dma_fence_wait_any_timeout(array, fence_count, true, timeout,
1689                                        &first);
1690         if (r < 0)
1691                 goto err_free_fence_array;
1692
1693 out:
1694         memset(wait, 0, sizeof(*wait));
1695         wait->out.status = (r > 0);
1696         wait->out.first_signaled = first;
1697
1698         if (first < fence_count && array[first])
1699                 r = array[first]->error;
1700         else
1701                 r = 0;
1702
1703 err_free_fence_array:
1704         for (i = 0; i < fence_count; i++)
1705                 dma_fence_put(array[i]);
1706         kfree(array);
1707
1708         return r;
1709 }
1710
1711 /**
1712  * amdgpu_cs_wait_fences_ioctl - wait for multiple command submissions to finish
1713  *
1714  * @dev: drm device
1715  * @data: data from userspace
1716  * @filp: file private
1717  */
1718 int amdgpu_cs_wait_fences_ioctl(struct drm_device *dev, void *data,
1719                                 struct drm_file *filp)
1720 {
1721         struct amdgpu_device *adev = drm_to_adev(dev);
1722         union drm_amdgpu_wait_fences *wait = data;
1723         uint32_t fence_count = wait->in.fence_count;
1724         struct drm_amdgpu_fence *fences_user;
1725         struct drm_amdgpu_fence *fences;
1726         int r;
1727
1728         /* Get the fences from userspace */
1729         fences = kmalloc_array(fence_count, sizeof(struct drm_amdgpu_fence),
1730                         GFP_KERNEL);
1731         if (fences == NULL)
1732                 return -ENOMEM;
1733
1734         fences_user = u64_to_user_ptr(wait->in.fences);
1735         if (copy_from_user(fences, fences_user,
1736                 sizeof(struct drm_amdgpu_fence) * fence_count)) {
1737                 r = -EFAULT;
1738                 goto err_free_fences;
1739         }
1740
1741         if (wait->in.wait_all)
1742                 r = amdgpu_cs_wait_all_fences(adev, filp, wait, fences);
1743         else
1744                 r = amdgpu_cs_wait_any_fence(adev, filp, wait, fences);
1745
1746 err_free_fences:
1747         kfree(fences);
1748
1749         return r;
1750 }
1751
1752 /**
1753  * amdgpu_cs_find_mapping - find bo_va for VM address
1754  *
1755  * @parser: command submission parser context
1756  * @addr: VM address
1757  * @bo: resulting BO of the mapping found
1758  * @map: Placeholder to return found BO mapping
1759  *
1760  * Search the buffer objects in the command submission context for a certain
1761  * virtual memory address. Returns allocation structure when found, NULL
1762  * otherwise.
1763  */
1764 int amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
1765                            uint64_t addr, struct amdgpu_bo **bo,
1766                            struct amdgpu_bo_va_mapping **map)
1767 {
1768         struct amdgpu_fpriv *fpriv = parser->filp->driver_priv;
1769         struct ttm_operation_ctx ctx = { false, false };
1770         struct amdgpu_vm *vm = &fpriv->vm;
1771         struct amdgpu_bo_va_mapping *mapping;
1772         int r;
1773
1774         addr /= AMDGPU_GPU_PAGE_SIZE;
1775
1776         mapping = amdgpu_vm_bo_lookup_mapping(vm, addr);
1777         if (!mapping || !mapping->bo_va || !mapping->bo_va->base.bo)
1778                 return -EINVAL;
1779
1780         *bo = mapping->bo_va->base.bo;
1781         *map = mapping;
1782
1783         /* Double check that the BO is reserved by this CS */
1784         if (dma_resv_locking_ctx((*bo)->tbo.base.resv) != &parser->ticket)
1785                 return -EINVAL;
1786
1787         if (!((*bo)->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)) {
1788                 (*bo)->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1789                 amdgpu_bo_placement_from_domain(*bo, (*bo)->allowed_domains);
1790                 r = ttm_bo_validate(&(*bo)->tbo, &(*bo)->placement, &ctx);
1791                 if (r)
1792                         return r;
1793         }
1794
1795         return amdgpu_ttm_alloc_gart(&(*bo)->tbo);
1796 }