drivers/gpu/drm/msm/msm_gem_submit.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2013 Red Hat
   4  * Author: Rob Clark <[email protected]>
   5  */
   6
   7 #include <linux/file.h>
   8 #include <linux/sync_file.h>
   9 #include <linux/uaccess.h>
  10
  11 #include <drm/drm_drv.h>
  12 #include <drm/drm_file.h>
  13 #include <drm/drm_syncobj.h>
  14
  15 #include "msm_drv.h"
  16 #include "msm_gpu.h"
  17 #include "msm_gem.h"
  18 #include "msm_gpu_trace.h"
  19
  20 /*
  21  * Cmdstream submission:
  22  */
  23
  24 /* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
  25 #define BO_VALID    0x8000   /* is current addr in cmdstream correct/valid? */
  26 #define BO_LOCKED   0x4000
  27 #define BO_PINNED   0x2000
  28
  29 static struct msm_gem_submit *submit_create(struct drm_device *dev,
  30                 struct msm_gpu *gpu, struct msm_gem_address_space *aspace,
  31                 struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
  32                 uint32_t nr_cmds)
  33 {
  34         struct msm_gem_submit *submit;
  35         uint64_t sz = struct_size(submit, bos, nr_bos) +
  36                                   ((u64)nr_cmds * sizeof(submit->cmd[0]));
  37
  38         if (sz > SIZE_MAX)
  39                 return NULL;
  40
  41         submit = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
  42         if (!submit)
  43                 return NULL;
  44
  45         submit->dev = dev;
  46         submit->aspace = aspace;
  47         submit->gpu = gpu;
  48         submit->fence = NULL;
  49         submit->cmd = (void *)&submit->bos[nr_bos];
  50         submit->queue = queue;
  51         submit->ring = gpu->rb[queue->prio];
  52
  53         /* initially, until copy_from_user() and bo lookup succeeds: */
  54         submit->nr_bos = 0;
  55         submit->nr_cmds = 0;
  56
  57         INIT_LIST_HEAD(&submit->node);
  58         INIT_LIST_HEAD(&submit->bo_list);
  59
  60         return submit;
  61 }
  62
  63 void msm_gem_submit_free(struct msm_gem_submit *submit)
  64 {
  65         dma_fence_put(submit->fence);
  66         list_del(&submit->node);
  67         put_pid(submit->pid);
  68         msm_submitqueue_put(submit->queue);
  69
  70         kfree(submit);
  71 }
  72
  73 static int submit_lookup_objects(struct msm_gem_submit *submit,
  74                 struct drm_msm_gem_submit *args, struct drm_file *file)
  75 {
  76         unsigned i;
  77         int ret = 0;
  78
  79         for (i = 0; i < args->nr_bos; i++) {
  80                 struct drm_msm_gem_submit_bo submit_bo;
  81                 void __user *userptr =
  82                         u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
  83
  84                 /* make sure we don't have garbage flags, in case we hit
  85                  * error path before flags is initialized:
  86                  */
  87                 submit->bos[i].flags = 0;
  88
  89                 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
  90                         ret = -EFAULT;
  91                         i = 0;
  92                         goto out;
  93                 }
  94
  95 /* at least one of READ and/or WRITE flags should be set: */
  96 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
  97
  98                 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
  99                         !(submit_bo.flags & MANDATORY_FLAGS)) {
 100                         DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
 101                         ret = -EINVAL;
 102                         i = 0;
 103                         goto out;
 104                 }
 105
 106                 submit->bos[i].handle = submit_bo.handle;
 107                 submit->bos[i].flags = submit_bo.flags;
 108                 /* in validate_objects() we figure out if this is true: */
 109                 submit->bos[i].iova  = submit_bo.presumed;
 110         }
 111
 112         spin_lock(&file->table_lock);
 113
 114         for (i = 0; i < args->nr_bos; i++) {
 115                 struct drm_gem_object *obj;
 116                 struct msm_gem_object *msm_obj;
 117
 118                 /* normally use drm_gem_object_lookup(), but for bulk lookup
 119                  * all under single table_lock just hit object_idr directly:
 120                  */
 121                 obj = idr_find(&file->object_idr, submit->bos[i].handle);
 122                 if (!obj) {
 123                         DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
 124                         ret = -EINVAL;
 125                         goto out_unlock;
 126                 }
 127
 128                 msm_obj = to_msm_bo(obj);
 129
 130                 if (!list_empty(&msm_obj->submit_entry)) {
 131                         DRM_ERROR("handle %u at index %u already on submit list\n",
 132                                         submit->bos[i].handle, i);
 133                         ret = -EINVAL;
 134                         goto out_unlock;
 135                 }
 136
 137                 drm_gem_object_get(obj);
 138
 139                 submit->bos[i].obj = msm_obj;
 140
 141                 list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
 142         }
 143
 144 out_unlock:
 145         spin_unlock(&file->table_lock);
 146
 147 out:
 148         submit->nr_bos = i;
 149
 150         return ret;
 151 }
 152
 153 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
 154                 int i, bool backoff)
 155 {
 156         struct msm_gem_object *msm_obj = submit->bos[i].obj;
 157
 158         if (submit->bos[i].flags & BO_PINNED)
 159                 msm_gem_unpin_iova(&msm_obj->base, submit->aspace);
 160
 161         if (submit->bos[i].flags & BO_LOCKED)
 162                 dma_resv_unlock(msm_obj->base.resv);
 163
 164         if (backoff && !(submit->bos[i].flags & BO_VALID))
 165                 submit->bos[i].iova = 0;
 166
 167         submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED);
 168 }
 169
 170 /* This is where we make sure all the bo's are reserved and pin'd: */
 171 static int submit_lock_objects(struct msm_gem_submit *submit)
 172 {
 173         int contended, slow_locked = -1, i, ret = 0;
 174
 175 retry:
 176         for (i = 0; i < submit->nr_bos; i++) {
 177                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 178
 179                 if (slow_locked == i)
 180                         slow_locked = -1;
 181
 182                 contended = i;
 183
 184                 if (!(submit->bos[i].flags & BO_LOCKED)) {
 185                         ret = dma_resv_lock_interruptible(msm_obj->base.resv,
 186                                                           &submit->ticket);
 187                         if (ret)
 188                                 goto fail;
 189                         submit->bos[i].flags |= BO_LOCKED;
 190                 }
 191         }
 192
 193         ww_acquire_done(&submit->ticket);
 194
 195         return 0;
 196
 197 fail:
 198         for (; i >= 0; i--)
 199                 submit_unlock_unpin_bo(submit, i, true);
 200
 201         if (slow_locked > 0)
 202                 submit_unlock_unpin_bo(submit, slow_locked, true);
 203
 204         if (ret == -EDEADLK) {
 205                 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
 206                 /* we lost out in a seqno race, lock and retry.. */
 207                 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
 208                                                        &submit->ticket);
 209                 if (!ret) {
 210                         submit->bos[contended].flags |= BO_LOCKED;
 211                         slow_locked = contended;
 212                         goto retry;
 213                 }
 214         }
 215
 216         return ret;
 217 }
 218
 219 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
 220 {
 221         int i, ret = 0;
 222
 223         for (i = 0; i < submit->nr_bos; i++) {
 224                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 225                 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
 226
 227                 if (!write) {
 228                         /* NOTE: _reserve_shared() must happen before
 229                          * _add_shared_fence(), which makes this a slightly
 230                          * strange place to call it.  OTOH this is a
 231                          * convenient can-fail point to hook it in.
 232                          */
 233                         ret = dma_resv_reserve_shared(msm_obj->base.resv,
 234                                                                 1);
 235                         if (ret)
 236                                 return ret;
 237                 }
 238
 239                 if (no_implicit)
 240                         continue;
 241
 242                 ret = msm_gem_sync_object(&msm_obj->base, submit->ring->fctx,
 243                         write);
 244                 if (ret)
 245                         break;
 246         }
 247
 248         return ret;
 249 }
 250
 251 static int submit_pin_objects(struct msm_gem_submit *submit)
 252 {
 253         int i, ret = 0;
 254
 255         submit->valid = true;
 256
 257         for (i = 0; i < submit->nr_bos; i++) {
 258                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 259                 uint64_t iova;
 260
 261                 /* if locking succeeded, pin bo: */
 262                 ret = msm_gem_get_and_pin_iova(&msm_obj->base,
 263                                 submit->aspace, &iova);
 264
 265                 if (ret)
 266                         break;
 267
 268                 submit->bos[i].flags |= BO_PINNED;
 269
 270                 if (iova == submit->bos[i].iova) {
 271                         submit->bos[i].flags |= BO_VALID;
 272                 } else {
 273                         submit->bos[i].iova = iova;
 274                         /* iova changed, so address in cmdstream is not valid: */
 275                         submit->bos[i].flags &= ~BO_VALID;
 276                         submit->valid = false;
 277                 }
 278         }
 279
 280         return ret;
 281 }
 282
 283 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 284                 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
 285 {
 286         if (idx >= submit->nr_bos) {
 287                 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
 288                                 idx, submit->nr_bos);
 289                 return -EINVAL;
 290         }
 291
 292         if (obj)
 293                 *obj = submit->bos[idx].obj;
 294         if (iova)
 295                 *iova = submit->bos[idx].iova;
 296         if (valid)
 297                 *valid = !!(submit->bos[idx].flags & BO_VALID);
 298
 299         return 0;
 300 }
 301
 302 /* process the reloc's and patch up the cmdstream as needed: */
 303 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
 304                 uint32_t offset, uint32_t nr_relocs, uint64_t relocs)
 305 {
 306         uint32_t i, last_offset = 0;
 307         uint32_t *ptr;
 308         int ret = 0;
 309
 310         if (!nr_relocs)
 311                 return 0;
 312
 313         if (offset % 4) {
 314                 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
 315                 return -EINVAL;
 316         }
 317
 318         /* For now, just map the entire thing.  Eventually we probably
 319          * to do it page-by-page, w/ kmap() if not vmap()d..
 320          */
 321         ptr = msm_gem_get_vaddr(&obj->base);
 322
 323         if (IS_ERR(ptr)) {
 324                 ret = PTR_ERR(ptr);
 325                 DBG("failed to map: %d", ret);
 326                 return ret;
 327         }
 328
 329         for (i = 0; i < nr_relocs; i++) {
 330                 struct drm_msm_gem_submit_reloc submit_reloc;
 331                 void __user *userptr =
 332                         u64_to_user_ptr(relocs + (i * sizeof(submit_reloc)));
 333                 uint32_t off;
 334                 uint64_t iova;
 335                 bool valid;
 336
 337                 if (copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc))) {
 338                         ret = -EFAULT;
 339                         goto out;
 340                 }
 341
 342                 if (submit_reloc.submit_offset % 4) {
 343                         DRM_ERROR("non-aligned reloc offset: %u\n",
 344                                         submit_reloc.submit_offset);
 345                         ret = -EINVAL;
 346                         goto out;
 347                 }
 348
 349                 /* offset in dwords: */
 350                 off = submit_reloc.submit_offset / 4;
 351
 352                 if ((off >= (obj->base.size / 4)) ||
 353                                 (off < last_offset)) {
 354                         DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
 355                         ret = -EINVAL;
 356                         goto out;
 357                 }
 358
 359                 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
 360                 if (ret)
 361                         goto out;
 362
 363                 if (valid)
 364                         continue;
 365
 366                 iova += submit_reloc.reloc_offset;
 367
 368                 if (submit_reloc.shift < 0)
 369                         iova >>= -submit_reloc.shift;
 370                 else
 371                         iova <<= submit_reloc.shift;
 372
 373                 ptr[off] = iova | submit_reloc.or;
 374
 375                 last_offset = off;
 376         }
 377
 378 out:
 379         msm_gem_put_vaddr(&obj->base);
 380
 381         return ret;
 382 }
 383
 384 static void submit_cleanup(struct msm_gem_submit *submit)
 385 {
 386         unsigned i;
 387
 388         for (i = 0; i < submit->nr_bos; i++) {
 389                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 390                 submit_unlock_unpin_bo(submit, i, false);
 391                 list_del_init(&msm_obj->submit_entry);
 392                 drm_gem_object_put_locked(&msm_obj->base);
 393         }
 394 }
 395
 396
 397 struct msm_submit_post_dep {
 398         struct drm_syncobj *syncobj;
 399         uint64_t point;
 400         struct dma_fence_chain *chain;
 401 };
 402
 403 static struct drm_syncobj **msm_wait_deps(struct drm_device *dev,
 404                                           struct drm_file *file,
 405                                           uint64_t in_syncobjs_addr,
 406                                           uint32_t nr_in_syncobjs,
 407                                           size_t syncobj_stride,
 408                                           struct msm_ringbuffer *ring)
 409 {
 410         struct drm_syncobj **syncobjs = NULL;
 411         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 412         int ret = 0;
 413         uint32_t i, j;
 414
 415         syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
 416                            GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 417         if (!syncobjs)
 418                 return ERR_PTR(-ENOMEM);
 419
 420         for (i = 0; i < nr_in_syncobjs; ++i) {
 421                 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
 422                 struct dma_fence *fence;
 423
 424                 if (copy_from_user(&syncobj_desc,
 425                                    u64_to_user_ptr(address),
 426                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 427                         ret = -EFAULT;
 428                         break;
 429                 }
 430
 431                 if (syncobj_desc.point &&
 432                     !drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) {
 433                         ret = -EOPNOTSUPP;
 434                         break;
 435                 }
 436
 437                 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
 438                         ret = -EINVAL;
 439                         break;
 440                 }
 441
 442                 ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
 443                                              syncobj_desc.point, 0, &fence);
 444                 if (ret)
 445                         break;
 446
 447                 if (!dma_fence_match_context(fence, ring->fctx->context))
 448                         ret = dma_fence_wait(fence, true);
 449
 450                 dma_fence_put(fence);
 451                 if (ret)
 452                         break;
 453
 454                 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
 455                         syncobjs[i] =
 456                                 drm_syncobj_find(file, syncobj_desc.handle);
 457                         if (!syncobjs[i]) {
 458                                 ret = -EINVAL;
 459                                 break;
 460                         }
 461                 }
 462         }
 463
 464         if (ret) {
 465                 for (j = 0; j <= i; ++j) {
 466                         if (syncobjs[j])
 467                                 drm_syncobj_put(syncobjs[j]);
 468                 }
 469                 kfree(syncobjs);
 470                 return ERR_PTR(ret);
 471         }
 472         return syncobjs;
 473 }
 474
 475 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
 476                                uint32_t nr_syncobjs)
 477 {
 478         uint32_t i;
 479
 480         for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
 481                 if (syncobjs[i])
 482                         drm_syncobj_replace_fence(syncobjs[i], NULL);
 483         }
 484 }
 485
 486 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
 487                                                        struct drm_file *file,
 488                                                        uint64_t syncobjs_addr,
 489                                                        uint32_t nr_syncobjs,
 490                                                        size_t syncobj_stride)
 491 {
 492         struct msm_submit_post_dep *post_deps;
 493         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 494         int ret = 0;
 495         uint32_t i, j;
 496
 497         post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
 498                                   GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 499         if (!post_deps)
 500                 return ERR_PTR(-ENOMEM);
 501
 502         for (i = 0; i < nr_syncobjs; ++i) {
 503                 uint64_t address = syncobjs_addr + i * syncobj_stride;
 504
 505                 if (copy_from_user(&syncobj_desc,
 506                                    u64_to_user_ptr(address),
 507                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 508                         ret = -EFAULT;
 509                         break;
 510                 }
 511
 512                 post_deps[i].point = syncobj_desc.point;
 513                 post_deps[i].chain = NULL;
 514
 515                 if (syncobj_desc.flags) {
 516                         ret = -EINVAL;
 517                         break;
 518                 }
 519
 520                 if (syncobj_desc.point) {
 521                         if (!drm_core_check_feature(dev,
 522                                                     DRIVER_SYNCOBJ_TIMELINE)) {
 523                                 ret = -EOPNOTSUPP;
 524                                 break;
 525                         }
 526
 527                         post_deps[i].chain =
 528                                 kmalloc(sizeof(*post_deps[i].chain),
 529                                         GFP_KERNEL);
 530                         if (!post_deps[i].chain) {
 531                                 ret = -ENOMEM;
 532                                 break;
 533                         }
 534                 }
 535
 536                 post_deps[i].syncobj =
 537                         drm_syncobj_find(file, syncobj_desc.handle);
 538                 if (!post_deps[i].syncobj) {
 539                         ret = -EINVAL;
 540                         break;
 541                 }
 542         }
 543
 544         if (ret) {
 545                 for (j = 0; j <= i; ++j) {
 546                         kfree(post_deps[j].chain);
 547                         if (post_deps[j].syncobj)
 548                                 drm_syncobj_put(post_deps[j].syncobj);
 549                 }
 550
 551                 kfree(post_deps);
 552                 return ERR_PTR(ret);
 553         }
 554
 555         return post_deps;
 556 }
 557
 558 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
 559                                   uint32_t count, struct dma_fence *fence)
 560 {
 561         uint32_t i;
 562
 563         for (i = 0; post_deps && i < count; ++i) {
 564                 if (post_deps[i].chain) {
 565                         drm_syncobj_add_point(post_deps[i].syncobj,
 566                                               post_deps[i].chain,
 567                                               fence, post_deps[i].point);
 568                         post_deps[i].chain = NULL;
 569                 } else {
 570                         drm_syncobj_replace_fence(post_deps[i].syncobj,
 571                                                   fence);
 572                 }
 573         }
 574 }
 575
 576 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 577                 struct drm_file *file)
 578 {
 579         static atomic_t ident = ATOMIC_INIT(0);
 580         struct msm_drm_private *priv = dev->dev_private;
 581         struct drm_msm_gem_submit *args = data;
 582         struct msm_file_private *ctx = file->driver_priv;
 583         struct msm_gem_submit *submit;
 584         struct msm_gpu *gpu = priv->gpu;
 585         struct sync_file *sync_file = NULL;
 586         struct msm_gpu_submitqueue *queue;
 587         struct msm_ringbuffer *ring;
 588         struct msm_submit_post_dep *post_deps = NULL;
 589         struct drm_syncobj **syncobjs_to_reset = NULL;
 590         int out_fence_fd = -1;
 591         struct pid *pid = get_pid(task_pid(current));
 592         bool has_ww_ticket = false;
 593         unsigned i;
 594         int ret, submitid;
 595         if (!gpu)
 596                 return -ENXIO;
 597
 598         if (args->pad)
 599                 return -EINVAL;
 600
 601         /* for now, we just have 3d pipe.. eventually this would need to
 602          * be more clever to dispatch to appropriate gpu module:
 603          */
 604         if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
 605                 return -EINVAL;
 606
 607         if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
 608                 return -EINVAL;
 609
 610         if (args->flags & MSM_SUBMIT_SUDO) {
 611                 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
 612                     !capable(CAP_SYS_RAWIO))
 613                         return -EINVAL;
 614         }
 615
 616         queue = msm_submitqueue_get(ctx, args->queueid);
 617         if (!queue)
 618                 return -ENOENT;
 619
 620         /* Get a unique identifier for the submission for logging purposes */
 621         submitid = atomic_inc_return(&ident) - 1;
 622
 623         ring = gpu->rb[queue->prio];
 624         trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
 625                 args->nr_bos, args->nr_cmds);
 626
 627         if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
 628                 struct dma_fence *in_fence;
 629
 630                 in_fence = sync_file_get_fence(args->fence_fd);
 631
 632                 if (!in_fence)
 633                         return -EINVAL;
 634
 635                 /*
 636                  * Wait if the fence is from a foreign context, or if the fence
 637                  * array contains any fence from a foreign context.
 638                  */
 639                 ret = 0;
 640                 if (!dma_fence_match_context(in_fence, ring->fctx->context))
 641                         ret = dma_fence_wait(in_fence, true);
 642
 643                 dma_fence_put(in_fence);
 644                 if (ret)
 645                         return ret;
 646         }
 647
 648         if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
 649                 syncobjs_to_reset = msm_wait_deps(dev, file,
 650                                                   args->in_syncobjs,
 651                                                   args->nr_in_syncobjs,
 652                                                   args->syncobj_stride, ring);
 653                 if (IS_ERR(syncobjs_to_reset))
 654                         return PTR_ERR(syncobjs_to_reset);
 655         }
 656
 657         if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
 658                 post_deps = msm_parse_post_deps(dev, file,
 659                                                 args->out_syncobjs,
 660                                                 args->nr_out_syncobjs,
 661                                                 args->syncobj_stride);
 662                 if (IS_ERR(post_deps)) {
 663                         ret = PTR_ERR(post_deps);
 664                         goto out_post_unlock;
 665                 }
 666         }
 667
 668         ret = mutex_lock_interruptible(&dev->struct_mutex);
 669         if (ret)
 670                 goto out_post_unlock;
 671
 672         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 673                 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
 674                 if (out_fence_fd < 0) {
 675                         ret = out_fence_fd;
 676                         goto out_unlock;
 677                 }
 678         }
 679
 680         submit = submit_create(dev, gpu, ctx->aspace, queue, args->nr_bos,
 681                 args->nr_cmds);
 682         if (!submit) {
 683                 ret = -ENOMEM;
 684                 goto out_unlock;
 685         }
 686
 687         submit->pid = pid;
 688         submit->ident = submitid;
 689
 690         if (args->flags & MSM_SUBMIT_SUDO)
 691                 submit->in_rb = true;
 692
 693         ret = submit_lookup_objects(submit, args, file);
 694         if (ret)
 695                 goto out;
 696
 697         /* copy_*_user while holding a ww ticket upsets lockdep */
 698         ww_acquire_init(&submit->ticket, &reservation_ww_class);
 699         has_ww_ticket = true;
 700         ret = submit_lock_objects(submit);
 701         if (ret)
 702                 goto out;
 703
 704         ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
 705         if (ret)
 706                 goto out;
 707
 708         ret = submit_pin_objects(submit);
 709         if (ret)
 710                 goto out;
 711
 712         for (i = 0; i < args->nr_cmds; i++) {
 713                 struct drm_msm_gem_submit_cmd submit_cmd;
 714                 void __user *userptr =
 715                         u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
 716                 struct msm_gem_object *msm_obj;
 717                 uint64_t iova;
 718
 719                 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
 720                 if (ret) {
 721                         ret = -EFAULT;
 722                         goto out;
 723                 }
 724
 725                 /* validate input from userspace: */
 726                 switch (submit_cmd.type) {
 727                 case MSM_SUBMIT_CMD_BUF:
 728                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 729                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 730                         break;
 731                 default:
 732                         DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
 733                         ret = -EINVAL;
 734                         goto out;
 735                 }
 736
 737                 ret = submit_bo(submit, submit_cmd.submit_idx,
 738                                 &msm_obj, &iova, NULL);
 739                 if (ret)
 740                         goto out;
 741
 742                 if (submit_cmd.size % 4) {
 743                         DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
 744                                         submit_cmd.size);
 745                         ret = -EINVAL;
 746                         goto out;
 747                 }
 748
 749                 if (!submit_cmd.size ||
 750                         ((submit_cmd.size + submit_cmd.submit_offset) >
 751                                 msm_obj->base.size)) {
 752                         DRM_ERROR("invalid cmdstream size: %u\n", submit_cmd.size);
 753                         ret = -EINVAL;
 754                         goto out;
 755                 }
 756
 757                 submit->cmd[i].type = submit_cmd.type;
 758                 submit->cmd[i].size = submit_cmd.size / 4;
 759                 submit->cmd[i].iova = iova + submit_cmd.submit_offset;
 760                 submit->cmd[i].idx  = submit_cmd.submit_idx;
 761
 762                 if (submit->valid)
 763                         continue;
 764
 765                 ret = submit_reloc(submit, msm_obj, submit_cmd.submit_offset,
 766                                 submit_cmd.nr_relocs, submit_cmd.relocs);
 767                 if (ret)
 768                         goto out;
 769         }
 770
 771         submit->nr_cmds = i;
 772
 773         submit->fence = msm_fence_alloc(ring->fctx);
 774         if (IS_ERR(submit->fence)) {
 775                 ret = PTR_ERR(submit->fence);
 776                 submit->fence = NULL;
 777                 goto out;
 778         }
 779
 780         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 781                 sync_file = sync_file_create(submit->fence);
 782                 if (!sync_file) {
 783                         ret = -ENOMEM;
 784                         goto out;
 785                 }
 786         }
 787
 788         msm_gpu_submit(gpu, submit, ctx);
 789
 790         args->fence = submit->fence->seqno;
 791
 792         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 793                 fd_install(out_fence_fd, sync_file->file);
 794                 args->fence_fd = out_fence_fd;
 795         }
 796
 797         msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
 798         msm_process_post_deps(post_deps, args->nr_out_syncobjs,
 799                               submit->fence);
 800
 801
 802 out:
 803         submit_cleanup(submit);
 804         if (has_ww_ticket)
 805                 ww_acquire_fini(&submit->ticket);
 806         if (ret)
 807                 msm_gem_submit_free(submit);
 808 out_unlock:
 809         if (ret && (out_fence_fd >= 0))
 810                 put_unused_fd(out_fence_fd);
 811         mutex_unlock(&dev->struct_mutex);
 812
 813 out_post_unlock:
 814         if (!IS_ERR_OR_NULL(post_deps)) {
 815                 for (i = 0; i < args->nr_out_syncobjs; ++i) {
 816                         kfree(post_deps[i].chain);
 817                         drm_syncobj_put(post_deps[i].syncobj);
 818                 }
 819                 kfree(post_deps);
 820         }
 821
 822         if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
 823                 for (i = 0; i < args->nr_in_syncobjs; ++i) {
 824                         if (syncobjs_to_reset[i])
 825                                 drm_syncobj_put(syncobjs_to_reset[i]);
 826                 }
 827                 kfree(syncobjs_to_reset);
 828         }
 829
 830         return ret;
 831 }