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 /* For userspace errors, use DRM_UT_DRIVER.. so that userspace can enable
  21  * error msgs for debugging, but we don't spam dmesg by default
  22  */
  23 #define SUBMIT_ERROR(submit, fmt, ...) \
  24         DRM_DEV_DEBUG_DRIVER((submit)->dev->dev, fmt, ##__VA_ARGS__)
  25
  26 /*
  27  * Cmdstream submission:
  28  */
  29
  30 static struct msm_gem_submit *submit_create(struct drm_device *dev,
  31                 struct msm_gpu *gpu,
  32                 struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
  33                 uint32_t nr_cmds)
  34 {
  35         static atomic_t ident = ATOMIC_INIT(0);
  36         struct msm_gem_submit *submit;
  37         uint64_t sz;
  38         int ret;
  39
  40         sz = struct_size(submit, bos, nr_bos) +
  41                         ((u64)nr_cmds * sizeof(submit->cmd[0]));
  42
  43         if (sz > SIZE_MAX)
  44                 return ERR_PTR(-ENOMEM);
  45
  46         submit = kzalloc(sz, GFP_KERNEL | __GFP_NOWARN);
  47         if (!submit)
  48                 return ERR_PTR(-ENOMEM);
  49
  50         submit->hw_fence = msm_fence_alloc();
  51         if (IS_ERR(submit->hw_fence)) {
  52                 ret = PTR_ERR(submit->hw_fence);
  53                 kfree(submit);
  54                 return ERR_PTR(ret);
  55         }
  56
  57         ret = drm_sched_job_init(&submit->base, queue->entity, 1, queue);
  58         if (ret) {
  59                 kfree(submit->hw_fence);
  60                 kfree(submit);
  61                 return ERR_PTR(ret);
  62         }
  63
  64         kref_init(&submit->ref);
  65         submit->dev = dev;
  66         submit->aspace = queue->ctx->aspace;
  67         submit->gpu = gpu;
  68         submit->cmd = (void *)&submit->bos[nr_bos];
  69         submit->queue = queue;
  70         submit->pid = get_pid(task_pid(current));
  71         submit->ring = gpu->rb[queue->ring_nr];
  72         submit->fault_dumped = false;
  73
  74         /* Get a unique identifier for the submission for logging purposes */
  75         submit->ident = atomic_inc_return(&ident) - 1;
  76
  77         INIT_LIST_HEAD(&submit->node);
  78
  79         return submit;
  80 }
  81
  82 void __msm_gem_submit_destroy(struct kref *kref)
  83 {
  84         struct msm_gem_submit *submit =
  85                         container_of(kref, struct msm_gem_submit, ref);
  86         unsigned i;
  87
  88         if (submit->fence_id) {
  89                 spin_lock(&submit->queue->idr_lock);
  90                 idr_remove(&submit->queue->fence_idr, submit->fence_id);
  91                 spin_unlock(&submit->queue->idr_lock);
  92         }
  93
  94         dma_fence_put(submit->user_fence);
  95
  96         /*
  97          * If the submit is freed before msm_job_run(), then hw_fence is
  98          * just some pre-allocated memory, not a reference counted fence.
  99          * Once the job runs and the hw_fence is initialized, it will
 100          * have a refcount of at least one, since the submit holds a ref
 101          * to the hw_fence.
 102          */
 103         if (kref_read(&submit->hw_fence->refcount) == 0) {
 104                 kfree(submit->hw_fence);
 105         } else {
 106                 dma_fence_put(submit->hw_fence);
 107         }
 108
 109         put_pid(submit->pid);
 110         msm_submitqueue_put(submit->queue);
 111
 112         for (i = 0; i < submit->nr_cmds; i++)
 113                 kfree(submit->cmd[i].relocs);
 114
 115         kfree(submit);
 116 }
 117
 118 static int submit_lookup_objects(struct msm_gem_submit *submit,
 119                 struct drm_msm_gem_submit *args, struct drm_file *file)
 120 {
 121         unsigned i;
 122         int ret = 0;
 123
 124         for (i = 0; i < args->nr_bos; i++) {
 125                 struct drm_msm_gem_submit_bo submit_bo;
 126                 void __user *userptr =
 127                         u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
 128
 129                 /* make sure we don't have garbage flags, in case we hit
 130                  * error path before flags is initialized:
 131                  */
 132                 submit->bos[i].flags = 0;
 133
 134                 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
 135                         ret = -EFAULT;
 136                         i = 0;
 137                         goto out;
 138                 }
 139
 140 /* at least one of READ and/or WRITE flags should be set: */
 141 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
 142
 143                 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
 144                         !(submit_bo.flags & MANDATORY_FLAGS)) {
 145                         SUBMIT_ERROR(submit, "invalid flags: %x\n", submit_bo.flags);
 146                         ret = -EINVAL;
 147                         i = 0;
 148                         goto out;
 149                 }
 150
 151                 submit->bos[i].handle = submit_bo.handle;
 152                 submit->bos[i].flags = submit_bo.flags;
 153         }
 154
 155         spin_lock(&file->table_lock);
 156
 157         for (i = 0; i < args->nr_bos; i++) {
 158                 struct drm_gem_object *obj;
 159
 160                 /* normally use drm_gem_object_lookup(), but for bulk lookup
 161                  * all under single table_lock just hit object_idr directly:
 162                  */
 163                 obj = idr_find(&file->object_idr, submit->bos[i].handle);
 164                 if (!obj) {
 165                         SUBMIT_ERROR(submit, "invalid handle %u at index %u\n", submit->bos[i].handle, i);
 166                         ret = -EINVAL;
 167                         goto out_unlock;
 168                 }
 169
 170                 drm_gem_object_get(obj);
 171
 172                 submit->bos[i].obj = obj;
 173         }
 174
 175 out_unlock:
 176         spin_unlock(&file->table_lock);
 177
 178 out:
 179         submit->nr_bos = i;
 180
 181         return ret;
 182 }
 183
 184 static int submit_lookup_cmds(struct msm_gem_submit *submit,
 185                 struct drm_msm_gem_submit *args, struct drm_file *file)
 186 {
 187         unsigned i;
 188         size_t sz;
 189         int ret = 0;
 190
 191         for (i = 0; i < args->nr_cmds; i++) {
 192                 struct drm_msm_gem_submit_cmd submit_cmd;
 193                 void __user *userptr =
 194                         u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
 195
 196                 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
 197                 if (ret) {
 198                         ret = -EFAULT;
 199                         goto out;
 200                 }
 201
 202                 /* validate input from userspace: */
 203                 switch (submit_cmd.type) {
 204                 case MSM_SUBMIT_CMD_BUF:
 205                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 206                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 207                         break;
 208                 default:
 209                         SUBMIT_ERROR(submit, "invalid type: %08x\n", submit_cmd.type);
 210                         return -EINVAL;
 211                 }
 212
 213                 if (submit_cmd.size % 4) {
 214                         SUBMIT_ERROR(submit, "non-aligned cmdstream buffer size: %u\n",
 215                                      submit_cmd.size);
 216                         ret = -EINVAL;
 217                         goto out;
 218                 }
 219
 220                 submit->cmd[i].type = submit_cmd.type;
 221                 submit->cmd[i].size = submit_cmd.size / 4;
 222                 submit->cmd[i].offset = submit_cmd.submit_offset / 4;
 223                 submit->cmd[i].idx  = submit_cmd.submit_idx;
 224                 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
 225
 226                 userptr = u64_to_user_ptr(submit_cmd.relocs);
 227
 228                 sz = array_size(submit_cmd.nr_relocs,
 229                                 sizeof(struct drm_msm_gem_submit_reloc));
 230                 /* check for overflow: */
 231                 if (sz == SIZE_MAX) {
 232                         ret = -ENOMEM;
 233                         goto out;
 234                 }
 235                 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN);
 236                 if (!submit->cmd[i].relocs) {
 237                         ret = -ENOMEM;
 238                         goto out;
 239                 }
 240                 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
 241                 if (ret) {
 242                         ret = -EFAULT;
 243                         goto out;
 244                 }
 245         }
 246
 247 out:
 248         return ret;
 249 }
 250
 251 /* This is where we make sure all the bo's are reserved and pin'd: */
 252 static int submit_lock_objects(struct msm_gem_submit *submit)
 253 {
 254         int ret;
 255
 256         drm_exec_init(&submit->exec, DRM_EXEC_INTERRUPTIBLE_WAIT, submit->nr_bos);
 257
 258         drm_exec_until_all_locked (&submit->exec) {
 259                 for (unsigned i = 0; i < submit->nr_bos; i++) {
 260                         struct drm_gem_object *obj = submit->bos[i].obj;
 261                         ret = drm_exec_prepare_obj(&submit->exec, obj, 1);
 262                         drm_exec_retry_on_contention(&submit->exec);
 263                         if (ret)
 264                                 goto error;
 265                 }
 266         }
 267
 268         return 0;
 269
 270 error:
 271         return ret;
 272 }
 273
 274 static int submit_fence_sync(struct msm_gem_submit *submit)
 275 {
 276         int i, ret = 0;
 277
 278         for (i = 0; i < submit->nr_bos; i++) {
 279                 struct drm_gem_object *obj = submit->bos[i].obj;
 280                 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
 281
 282                 /* Otherwise userspace can ask for implicit sync to be
 283                  * disabled on specific buffers.  This is useful for internal
 284                  * usermode driver managed buffers, suballocation, etc.
 285                  */
 286                 if (submit->bos[i].flags & MSM_SUBMIT_BO_NO_IMPLICIT)
 287                         continue;
 288
 289                 ret = drm_sched_job_add_implicit_dependencies(&submit->base,
 290                                                               obj,
 291                                                               write);
 292                 if (ret)
 293                         break;
 294         }
 295
 296         return ret;
 297 }
 298
 299 static int submit_pin_objects(struct msm_gem_submit *submit)
 300 {
 301         struct msm_drm_private *priv = submit->dev->dev_private;
 302         int i, ret = 0;
 303
 304         for (i = 0; i < submit->nr_bos; i++) {
 305                 struct drm_gem_object *obj = submit->bos[i].obj;
 306                 struct msm_gem_vma *vma;
 307
 308                 /* if locking succeeded, pin bo: */
 309                 vma = msm_gem_get_vma_locked(obj, submit->aspace);
 310                 if (IS_ERR(vma)) {
 311                         ret = PTR_ERR(vma);
 312                         break;
 313                 }
 314
 315                 ret = msm_gem_pin_vma_locked(obj, vma);
 316                 if (ret)
 317                         break;
 318
 319                 submit->bos[i].iova = vma->iova;
 320         }
 321
 322         /*
 323          * A second loop while holding the LRU lock (a) avoids acquiring/dropping
 324          * the LRU lock for each individual bo, while (b) avoiding holding the
 325          * LRU lock while calling msm_gem_pin_vma_locked() (which could trigger
 326          * get_pages() which could trigger reclaim.. and if we held the LRU lock
 327          * could trigger deadlock with the shrinker).
 328          */
 329         mutex_lock(&priv->lru.lock);
 330         for (i = 0; i < submit->nr_bos; i++) {
 331                 msm_gem_pin_obj_locked(submit->bos[i].obj);
 332         }
 333         mutex_unlock(&priv->lru.lock);
 334
 335         submit->bos_pinned = true;
 336
 337         return ret;
 338 }
 339
 340 static void submit_unpin_objects(struct msm_gem_submit *submit)
 341 {
 342         if (!submit->bos_pinned)
 343                 return;
 344
 345         for (int i = 0; i < submit->nr_bos; i++) {
 346                 struct drm_gem_object *obj = submit->bos[i].obj;
 347
 348                 msm_gem_unpin_locked(obj);
 349         }
 350
 351         submit->bos_pinned = false;
 352 }
 353
 354 static void submit_attach_object_fences(struct msm_gem_submit *submit)
 355 {
 356         int i;
 357
 358         for (i = 0; i < submit->nr_bos; i++) {
 359                 struct drm_gem_object *obj = submit->bos[i].obj;
 360
 361                 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
 362                         dma_resv_add_fence(obj->resv, submit->user_fence,
 363                                            DMA_RESV_USAGE_WRITE);
 364                 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
 365                         dma_resv_add_fence(obj->resv, submit->user_fence,
 366                                            DMA_RESV_USAGE_READ);
 367         }
 368 }
 369
 370 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 371                 struct drm_gem_object **obj, uint64_t *iova)
 372 {
 373         if (idx >= submit->nr_bos) {
 374                 SUBMIT_ERROR(submit, "invalid buffer index: %u (out of %u)\n",
 375                              idx, submit->nr_bos);
 376                 return -EINVAL;
 377         }
 378
 379         if (obj)
 380                 *obj = submit->bos[idx].obj;
 381         if (iova)
 382                 *iova = submit->bos[idx].iova;
 383
 384         return 0;
 385 }
 386
 387 /* process the reloc's and patch up the cmdstream as needed: */
 388 static int submit_reloc(struct msm_gem_submit *submit, struct drm_gem_object *obj,
 389                 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
 390 {
 391         uint32_t i, last_offset = 0;
 392         uint32_t *ptr;
 393         int ret = 0;
 394
 395         if (offset % 4) {
 396                 SUBMIT_ERROR(submit, "non-aligned cmdstream buffer: %u\n", offset);
 397                 return -EINVAL;
 398         }
 399
 400         /* For now, just map the entire thing.  Eventually we probably
 401          * to do it page-by-page, w/ kmap() if not vmap()d..
 402          */
 403         ptr = msm_gem_get_vaddr_locked(obj);
 404
 405         if (IS_ERR(ptr)) {
 406                 ret = PTR_ERR(ptr);
 407                 DBG("failed to map: %d", ret);
 408                 return ret;
 409         }
 410
 411         for (i = 0; i < nr_relocs; i++) {
 412                 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
 413                 uint32_t off;
 414                 uint64_t iova;
 415
 416                 if (submit_reloc.submit_offset % 4) {
 417                         SUBMIT_ERROR(submit, "non-aligned reloc offset: %u\n",
 418                                      submit_reloc.submit_offset);
 419                         ret = -EINVAL;
 420                         goto out;
 421                 }
 422
 423                 /* offset in dwords: */
 424                 off = submit_reloc.submit_offset / 4;
 425
 426                 if ((off >= (obj->size / 4)) ||
 427                                 (off < last_offset)) {
 428                         SUBMIT_ERROR(submit, "invalid offset %u at reloc %u\n", off, i);
 429                         ret = -EINVAL;
 430                         goto out;
 431                 }
 432
 433                 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova);
 434                 if (ret)
 435                         goto out;
 436
 437                 iova += submit_reloc.reloc_offset;
 438
 439                 if (submit_reloc.shift < 0)
 440                         iova >>= -submit_reloc.shift;
 441                 else
 442                         iova <<= submit_reloc.shift;
 443
 444                 ptr[off] = iova | submit_reloc.or;
 445
 446                 last_offset = off;
 447         }
 448
 449 out:
 450         msm_gem_put_vaddr_locked(obj);
 451
 452         return ret;
 453 }
 454
 455 /* Cleanup submit at end of ioctl.  In the error case, this also drops
 456  * references, unpins, and drops active refcnt.  In the non-error case,
 457  * this is done when the submit is retired.
 458  */
 459 static void submit_cleanup(struct msm_gem_submit *submit, bool error)
 460 {
 461         if (error) {
 462                 submit_unpin_objects(submit);
 463                 /* job wasn't enqueued to scheduler, so early retirement: */
 464                 msm_submit_retire(submit);
 465         }
 466
 467         if (submit->exec.objects)
 468                 drm_exec_fini(&submit->exec);
 469 }
 470
 471 void msm_submit_retire(struct msm_gem_submit *submit)
 472 {
 473         int i;
 474
 475         for (i = 0; i < submit->nr_bos; i++) {
 476                 struct drm_gem_object *obj = submit->bos[i].obj;
 477
 478                 drm_gem_object_put(obj);
 479         }
 480 }
 481
 482 struct msm_submit_post_dep {
 483         struct drm_syncobj *syncobj;
 484         uint64_t point;
 485         struct dma_fence_chain *chain;
 486 };
 487
 488 static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit,
 489                                            struct drm_file *file,
 490                                            uint64_t in_syncobjs_addr,
 491                                            uint32_t nr_in_syncobjs,
 492                                            size_t syncobj_stride)
 493 {
 494         struct drm_syncobj **syncobjs = NULL;
 495         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 496         int ret = 0;
 497         uint32_t i, j;
 498
 499         syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
 500                            GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 501         if (!syncobjs)
 502                 return ERR_PTR(-ENOMEM);
 503
 504         for (i = 0; i < nr_in_syncobjs; ++i) {
 505                 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
 506
 507                 if (copy_from_user(&syncobj_desc,
 508                                    u64_to_user_ptr(address),
 509                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 510                         ret = -EFAULT;
 511                         break;
 512                 }
 513
 514                 if (syncobj_desc.point &&
 515                     !drm_core_check_feature(submit->dev, DRIVER_SYNCOBJ_TIMELINE)) {
 516                         ret = -EOPNOTSUPP;
 517                         break;
 518                 }
 519
 520                 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
 521                         ret = -EINVAL;
 522                         break;
 523                 }
 524
 525                 ret = drm_sched_job_add_syncobj_dependency(&submit->base, file,
 526                                                            syncobj_desc.handle, syncobj_desc.point);
 527                 if (ret)
 528                         break;
 529
 530                 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
 531                         syncobjs[i] =
 532                                 drm_syncobj_find(file, syncobj_desc.handle);
 533                         if (!syncobjs[i]) {
 534                                 ret = -EINVAL;
 535                                 break;
 536                         }
 537                 }
 538         }
 539
 540         if (ret) {
 541                 for (j = 0; j <= i; ++j) {
 542                         if (syncobjs[j])
 543                                 drm_syncobj_put(syncobjs[j]);
 544                 }
 545                 kfree(syncobjs);
 546                 return ERR_PTR(ret);
 547         }
 548         return syncobjs;
 549 }
 550
 551 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
 552                                uint32_t nr_syncobjs)
 553 {
 554         uint32_t i;
 555
 556         for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
 557                 if (syncobjs[i])
 558                         drm_syncobj_replace_fence(syncobjs[i], NULL);
 559         }
 560 }
 561
 562 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
 563                                                        struct drm_file *file,
 564                                                        uint64_t syncobjs_addr,
 565                                                        uint32_t nr_syncobjs,
 566                                                        size_t syncobj_stride)
 567 {
 568         struct msm_submit_post_dep *post_deps;
 569         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 570         int ret = 0;
 571         uint32_t i, j;
 572
 573         post_deps = kcalloc(nr_syncobjs, sizeof(*post_deps),
 574                             GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 575         if (!post_deps)
 576                 return ERR_PTR(-ENOMEM);
 577
 578         for (i = 0; i < nr_syncobjs; ++i) {
 579                 uint64_t address = syncobjs_addr + i * syncobj_stride;
 580
 581                 if (copy_from_user(&syncobj_desc,
 582                                    u64_to_user_ptr(address),
 583                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 584                         ret = -EFAULT;
 585                         break;
 586                 }
 587
 588                 post_deps[i].point = syncobj_desc.point;
 589
 590                 if (syncobj_desc.flags) {
 591                         ret = -EINVAL;
 592                         break;
 593                 }
 594
 595                 if (syncobj_desc.point) {
 596                         if (!drm_core_check_feature(dev,
 597                                                     DRIVER_SYNCOBJ_TIMELINE)) {
 598                                 ret = -EOPNOTSUPP;
 599                                 break;
 600                         }
 601
 602                         post_deps[i].chain = dma_fence_chain_alloc();
 603                         if (!post_deps[i].chain) {
 604                                 ret = -ENOMEM;
 605                                 break;
 606                         }
 607                 }
 608
 609                 post_deps[i].syncobj =
 610                         drm_syncobj_find(file, syncobj_desc.handle);
 611                 if (!post_deps[i].syncobj) {
 612                         ret = -EINVAL;
 613                         break;
 614                 }
 615         }
 616
 617         if (ret) {
 618                 for (j = 0; j <= i; ++j) {
 619                         dma_fence_chain_free(post_deps[j].chain);
 620                         if (post_deps[j].syncobj)
 621                                 drm_syncobj_put(post_deps[j].syncobj);
 622                 }
 623
 624                 kfree(post_deps);
 625                 return ERR_PTR(ret);
 626         }
 627
 628         return post_deps;
 629 }
 630
 631 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
 632                                   uint32_t count, struct dma_fence *fence)
 633 {
 634         uint32_t i;
 635
 636         for (i = 0; post_deps && i < count; ++i) {
 637                 if (post_deps[i].chain) {
 638                         drm_syncobj_add_point(post_deps[i].syncobj,
 639                                               post_deps[i].chain,
 640                                               fence, post_deps[i].point);
 641                         post_deps[i].chain = NULL;
 642                 } else {
 643                         drm_syncobj_replace_fence(post_deps[i].syncobj,
 644                                                   fence);
 645                 }
 646         }
 647 }
 648
 649 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 650                 struct drm_file *file)
 651 {
 652         struct msm_drm_private *priv = dev->dev_private;
 653         struct drm_msm_gem_submit *args = data;
 654         struct msm_file_private *ctx = file->driver_priv;
 655         struct msm_gem_submit *submit = NULL;
 656         struct msm_gpu *gpu = priv->gpu;
 657         struct msm_gpu_submitqueue *queue;
 658         struct msm_ringbuffer *ring;
 659         struct msm_submit_post_dep *post_deps = NULL;
 660         struct drm_syncobj **syncobjs_to_reset = NULL;
 661         int out_fence_fd = -1;
 662         unsigned i;
 663         int ret;
 664
 665         if (!gpu)
 666                 return -ENXIO;
 667
 668         if (args->pad)
 669                 return -EINVAL;
 670
 671         if (unlikely(!ctx->aspace) && !capable(CAP_SYS_RAWIO)) {
 672                 DRM_ERROR_RATELIMITED("IOMMU support or CAP_SYS_RAWIO required!\n");
 673                 return -EPERM;
 674         }
 675
 676         /* for now, we just have 3d pipe.. eventually this would need to
 677          * be more clever to dispatch to appropriate gpu module:
 678          */
 679         if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
 680                 return -EINVAL;
 681
 682         if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
 683                 return -EINVAL;
 684
 685         if (args->flags & MSM_SUBMIT_SUDO) {
 686                 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
 687                     !capable(CAP_SYS_RAWIO))
 688                         return -EINVAL;
 689         }
 690
 691         queue = msm_submitqueue_get(ctx, args->queueid);
 692         if (!queue)
 693                 return -ENOENT;
 694
 695         ring = gpu->rb[queue->ring_nr];
 696
 697         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 698                 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
 699                 if (out_fence_fd < 0) {
 700                         ret = out_fence_fd;
 701                         goto out_post_unlock;
 702                 }
 703         }
 704
 705         submit = submit_create(dev, gpu, queue, args->nr_bos, args->nr_cmds);
 706         if (IS_ERR(submit)) {
 707                 ret = PTR_ERR(submit);
 708                 goto out_post_unlock;
 709         }
 710
 711         trace_msm_gpu_submit(pid_nr(submit->pid), ring->id, submit->ident,
 712                 args->nr_bos, args->nr_cmds);
 713
 714         ret = mutex_lock_interruptible(&queue->lock);
 715         if (ret)
 716                 goto out_post_unlock;
 717
 718         if (args->flags & MSM_SUBMIT_SUDO)
 719                 submit->in_rb = true;
 720
 721         if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
 722                 struct dma_fence *in_fence;
 723
 724                 in_fence = sync_file_get_fence(args->fence_fd);
 725
 726                 if (!in_fence) {
 727                         ret = -EINVAL;
 728                         goto out_unlock;
 729                 }
 730
 731                 ret = drm_sched_job_add_dependency(&submit->base, in_fence);
 732                 if (ret)
 733                         goto out_unlock;
 734         }
 735
 736         if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
 737                 syncobjs_to_reset = msm_parse_deps(submit, file,
 738                                                    args->in_syncobjs,
 739                                                    args->nr_in_syncobjs,
 740                                                    args->syncobj_stride);
 741                 if (IS_ERR(syncobjs_to_reset)) {
 742                         ret = PTR_ERR(syncobjs_to_reset);
 743                         goto out_unlock;
 744                 }
 745         }
 746
 747         if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
 748                 post_deps = msm_parse_post_deps(dev, file,
 749                                                 args->out_syncobjs,
 750                                                 args->nr_out_syncobjs,
 751                                                 args->syncobj_stride);
 752                 if (IS_ERR(post_deps)) {
 753                         ret = PTR_ERR(post_deps);
 754                         goto out_unlock;
 755                 }
 756         }
 757
 758         ret = submit_lookup_objects(submit, args, file);
 759         if (ret)
 760                 goto out;
 761
 762         ret = submit_lookup_cmds(submit, args, file);
 763         if (ret)
 764                 goto out;
 765
 766         /* copy_*_user while holding a ww ticket upsets lockdep */
 767         ret = submit_lock_objects(submit);
 768         if (ret)
 769                 goto out;
 770
 771         if (!(args->flags & MSM_SUBMIT_NO_IMPLICIT)) {
 772                 ret = submit_fence_sync(submit);
 773                 if (ret)
 774                         goto out;
 775         }
 776
 777         ret = submit_pin_objects(submit);
 778         if (ret)
 779                 goto out;
 780
 781         for (i = 0; i < args->nr_cmds; i++) {
 782                 struct drm_gem_object *obj;
 783                 uint64_t iova;
 784
 785                 ret = submit_bo(submit, submit->cmd[i].idx, &obj, &iova);
 786                 if (ret)
 787                         goto out;
 788
 789                 if (!submit->cmd[i].size ||
 790                         ((submit->cmd[i].size + submit->cmd[i].offset) >
 791                                 obj->size / 4)) {
 792                         SUBMIT_ERROR(submit, "invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
 793                         ret = -EINVAL;
 794                         goto out;
 795                 }
 796
 797                 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
 798
 799                 if (likely(!submit->cmd[i].nr_relocs))
 800                         continue;
 801
 802                 if (!gpu->allow_relocs) {
 803                         SUBMIT_ERROR(submit, "relocs not allowed\n");
 804                         ret = -EINVAL;
 805                         goto out;
 806                 }
 807
 808                 ret = submit_reloc(submit, obj, submit->cmd[i].offset * 4,
 809                                 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
 810                 if (ret)
 811                         goto out;
 812         }
 813
 814         submit->nr_cmds = i;
 815
 816         idr_preload(GFP_KERNEL);
 817
 818         spin_lock(&queue->idr_lock);
 819
 820         /*
 821          * If using userspace provided seqno fence, validate that the id
 822          * is available before arming sched job.  Since access to fence_idr
 823          * is serialized on the queue lock, the slot should be still avail
 824          * after the job is armed
 825          */
 826         if ((args->flags & MSM_SUBMIT_FENCE_SN_IN) &&
 827                         (!args->fence || idr_find(&queue->fence_idr, args->fence))) {
 828                 spin_unlock(&queue->idr_lock);
 829                 idr_preload_end();
 830                 ret = -EINVAL;
 831                 goto out;
 832         }
 833
 834         drm_sched_job_arm(&submit->base);
 835
 836         submit->user_fence = dma_fence_get(&submit->base.s_fence->finished);
 837
 838         if (args->flags & MSM_SUBMIT_FENCE_SN_IN) {
 839                 /*
 840                  * Userspace has assigned the seqno fence that it wants
 841                  * us to use.  It is an error to pick a fence sequence
 842                  * number that is not available.
 843                  */
 844                 submit->fence_id = args->fence;
 845                 ret = idr_alloc_u32(&queue->fence_idr, submit->user_fence,
 846                                     &submit->fence_id, submit->fence_id,
 847                                     GFP_NOWAIT);
 848                 /*
 849                  * We've already validated that the fence_id slot is valid,
 850                  * so if idr_alloc_u32 failed, it is a kernel bug
 851                  */
 852                 WARN_ON(ret);
 853         } else {
 854                 /*
 855                  * Allocate an id which can be used by WAIT_FENCE ioctl to map
 856                  * back to the underlying fence.
 857                  */
 858                 submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
 859                                                     submit->user_fence, 1,
 860                                                     INT_MAX, GFP_NOWAIT);
 861         }
 862
 863         spin_unlock(&queue->idr_lock);
 864         idr_preload_end();
 865
 866         if (submit->fence_id < 0) {
 867                 ret = submit->fence_id;
 868                 submit->fence_id = 0;
 869         }
 870
 871         if (ret == 0 && args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 872                 struct sync_file *sync_file = sync_file_create(submit->user_fence);
 873                 if (!sync_file) {
 874                         ret = -ENOMEM;
 875                 } else {
 876                         fd_install(out_fence_fd, sync_file->file);
 877                         args->fence_fd = out_fence_fd;
 878                 }
 879         }
 880
 881         if (ret)
 882                 goto out;
 883
 884         submit_attach_object_fences(submit);
 885
 886         /* The scheduler owns a ref now: */
 887         msm_gem_submit_get(submit);
 888
 889         msm_rd_dump_submit(priv->rd, submit, NULL);
 890
 891         drm_sched_entity_push_job(&submit->base);
 892
 893         args->fence = submit->fence_id;
 894         queue->last_fence = submit->fence_id;
 895
 896         msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
 897         msm_process_post_deps(post_deps, args->nr_out_syncobjs,
 898                               submit->user_fence);
 899
 900
 901 out:
 902         submit_cleanup(submit, !!ret);
 903 out_unlock:
 904         mutex_unlock(&queue->lock);
 905 out_post_unlock:
 906         if (ret && (out_fence_fd >= 0))
 907                 put_unused_fd(out_fence_fd);
 908
 909         if (!IS_ERR_OR_NULL(submit)) {
 910                 msm_gem_submit_put(submit);
 911         } else {
 912                 /*
 913                  * If the submit hasn't yet taken ownership of the queue
 914                  * then we need to drop the reference ourself:
 915                  */
 916                 msm_submitqueue_put(queue);
 917         }
 918         if (!IS_ERR_OR_NULL(post_deps)) {
 919                 for (i = 0; i < args->nr_out_syncobjs; ++i) {
 920                         kfree(post_deps[i].chain);
 921                         drm_syncobj_put(post_deps[i].syncobj);
 922                 }
 923                 kfree(post_deps);
 924         }
 925
 926         if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
 927                 for (i = 0; i < args->nr_in_syncobjs; ++i) {
 928                         if (syncobjs_to_reset[i])
 929                                 drm_syncobj_put(syncobjs_to_reset[i]);
 930                 }
 931                 kfree(syncobjs_to_reset);
 932         }
 933
 934         return ret;
 935 }