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 <robdclark@gmail.com>
   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   /* obj lock is held */
  27 #define BO_ACTIVE   0x2000   /* active refcnt is held */
  28 #define BO_PINNED   0x1000   /* obj is pinned and on active list */
  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         struct msm_gem_submit *submit;
  36         uint64_t sz;
  37         int ret;
  38
  39         sz = struct_size(submit, bos, nr_bos) +
  40                         ((u64)nr_cmds * sizeof(submit->cmd[0]));
  41
  42         if (sz > SIZE_MAX)
  43                 return ERR_PTR(-ENOMEM);
  44
  45         submit = kzalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
  46         if (!submit)
  47                 return ERR_PTR(-ENOMEM);
  48
  49         ret = drm_sched_job_init(&submit->base, &queue->entity, queue);
  50         if (ret) {
  51                 kfree(submit);
  52                 return ERR_PTR(ret);
  53         }
  54
  55         xa_init_flags(&submit->deps, XA_FLAGS_ALLOC);
  56
  57         kref_init(&submit->ref);
  58         submit->dev = dev;
  59         submit->aspace = queue->ctx->aspace;
  60         submit->gpu = gpu;
  61         submit->cmd = (void *)&submit->bos[nr_bos];
  62         submit->queue = queue;
  63         submit->ring = gpu->rb[queue->ring_nr];
  64         submit->fault_dumped = false;
  65
  66         INIT_LIST_HEAD(&submit->node);
  67
  68         return submit;
  69 }
  70
  71 void __msm_gem_submit_destroy(struct kref *kref)
  72 {
  73         struct msm_gem_submit *submit =
  74                         container_of(kref, struct msm_gem_submit, ref);
  75         unsigned long index;
  76         struct dma_fence *fence;
  77         unsigned i;
  78
  79         if (submit->fence_id) {
  80                 mutex_lock(&submit->queue->lock);
  81                 idr_remove(&submit->queue->fence_idr, submit->fence_id);
  82                 mutex_unlock(&submit->queue->lock);
  83         }
  84
  85         xa_for_each (&submit->deps, index, fence) {
  86                 dma_fence_put(fence);
  87         }
  88
  89         xa_destroy(&submit->deps);
  90
  91         dma_fence_put(submit->user_fence);
  92         dma_fence_put(submit->hw_fence);
  93
  94         put_pid(submit->pid);
  95         msm_submitqueue_put(submit->queue);
  96
  97         for (i = 0; i < submit->nr_cmds; i++)
  98                 kfree(submit->cmd[i].relocs);
  99
 100         kfree(submit);
 101 }
 102
 103 static int submit_lookup_objects(struct msm_gem_submit *submit,
 104                 struct drm_msm_gem_submit *args, struct drm_file *file)
 105 {
 106         unsigned i;
 107         int ret = 0;
 108
 109         for (i = 0; i < args->nr_bos; i++) {
 110                 struct drm_msm_gem_submit_bo submit_bo;
 111                 void __user *userptr =
 112                         u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
 113
 114                 /* make sure we don't have garbage flags, in case we hit
 115                  * error path before flags is initialized:
 116                  */
 117                 submit->bos[i].flags = 0;
 118
 119                 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
 120                         ret = -EFAULT;
 121                         i = 0;
 122                         goto out;
 123                 }
 124
 125 /* at least one of READ and/or WRITE flags should be set: */
 126 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
 127
 128                 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
 129                         !(submit_bo.flags & MANDATORY_FLAGS)) {
 130                         DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
 131                         ret = -EINVAL;
 132                         i = 0;
 133                         goto out;
 134                 }
 135
 136                 submit->bos[i].handle = submit_bo.handle;
 137                 submit->bos[i].flags = submit_bo.flags;
 138                 /* in validate_objects() we figure out if this is true: */
 139                 submit->bos[i].iova  = submit_bo.presumed;
 140         }
 141
 142         spin_lock(&file->table_lock);
 143
 144         for (i = 0; i < args->nr_bos; i++) {
 145                 struct drm_gem_object *obj;
 146
 147                 /* normally use drm_gem_object_lookup(), but for bulk lookup
 148                  * all under single table_lock just hit object_idr directly:
 149                  */
 150                 obj = idr_find(&file->object_idr, submit->bos[i].handle);
 151                 if (!obj) {
 152                         DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
 153                         ret = -EINVAL;
 154                         goto out_unlock;
 155                 }
 156
 157                 drm_gem_object_get(obj);
 158
 159                 submit->bos[i].obj = to_msm_bo(obj);
 160         }
 161
 162 out_unlock:
 163         spin_unlock(&file->table_lock);
 164
 165 out:
 166         submit->nr_bos = i;
 167
 168         return ret;
 169 }
 170
 171 static int submit_lookup_cmds(struct msm_gem_submit *submit,
 172                 struct drm_msm_gem_submit *args, struct drm_file *file)
 173 {
 174         unsigned i, sz;
 175         int ret = 0;
 176
 177         for (i = 0; i < args->nr_cmds; i++) {
 178                 struct drm_msm_gem_submit_cmd submit_cmd;
 179                 void __user *userptr =
 180                         u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
 181
 182                 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
 183                 if (ret) {
 184                         ret = -EFAULT;
 185                         goto out;
 186                 }
 187
 188                 /* validate input from userspace: */
 189                 switch (submit_cmd.type) {
 190                 case MSM_SUBMIT_CMD_BUF:
 191                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 192                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 193                         break;
 194                 default:
 195                         DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
 196                         return -EINVAL;
 197                 }
 198
 199                 if (submit_cmd.size % 4) {
 200                         DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
 201                                         submit_cmd.size);
 202                         ret = -EINVAL;
 203                         goto out;
 204                 }
 205
 206                 submit->cmd[i].type = submit_cmd.type;
 207                 submit->cmd[i].size = submit_cmd.size / 4;
 208                 submit->cmd[i].offset = submit_cmd.submit_offset / 4;
 209                 submit->cmd[i].idx  = submit_cmd.submit_idx;
 210                 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
 211
 212                 userptr = u64_to_user_ptr(submit_cmd.relocs);
 213
 214                 sz = array_size(submit_cmd.nr_relocs,
 215                                 sizeof(struct drm_msm_gem_submit_reloc));
 216                 /* check for overflow: */
 217                 if (sz == SIZE_MAX) {
 218                         ret = -ENOMEM;
 219                         goto out;
 220                 }
 221                 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
 222                 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
 223                 if (ret) {
 224                         ret = -EFAULT;
 225                         goto out;
 226                 }
 227         }
 228
 229 out:
 230         return ret;
 231 }
 232
 233 /* Unwind bo state, according to cleanup_flags.  In the success case, only
 234  * the lock is dropped at the end of the submit (and active/pin ref is dropped
 235  * later when the submit is retired).
 236  */
 237 static void submit_cleanup_bo(struct msm_gem_submit *submit, int i,
 238                 unsigned cleanup_flags)
 239 {
 240         struct drm_gem_object *obj = &submit->bos[i].obj->base;
 241         unsigned flags = submit->bos[i].flags & cleanup_flags;
 242
 243         if (flags & BO_PINNED)
 244                 msm_gem_unpin_iova_locked(obj, submit->aspace);
 245
 246         if (flags & BO_ACTIVE)
 247                 msm_gem_active_put(obj);
 248
 249         if (flags & BO_LOCKED)
 250                 dma_resv_unlock(obj->resv);
 251
 252         submit->bos[i].flags &= ~cleanup_flags;
 253 }
 254
 255 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
 256 {
 257         submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE | BO_LOCKED);
 258
 259         if (!(submit->bos[i].flags & BO_VALID))
 260                 submit->bos[i].iova = 0;
 261 }
 262
 263 /* This is where we make sure all the bo's are reserved and pin'd: */
 264 static int submit_lock_objects(struct msm_gem_submit *submit)
 265 {
 266         int contended, slow_locked = -1, i, ret = 0;
 267
 268 retry:
 269         for (i = 0; i < submit->nr_bos; i++) {
 270                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 271
 272                 if (slow_locked == i)
 273                         slow_locked = -1;
 274
 275                 contended = i;
 276
 277                 if (!(submit->bos[i].flags & BO_LOCKED)) {
 278                         ret = dma_resv_lock_interruptible(msm_obj->base.resv,
 279                                                           &submit->ticket);
 280                         if (ret)
 281                                 goto fail;
 282                         submit->bos[i].flags |= BO_LOCKED;
 283                 }
 284         }
 285
 286         ww_acquire_done(&submit->ticket);
 287
 288         return 0;
 289
 290 fail:
 291         if (ret == -EALREADY) {
 292                 DRM_ERROR("handle %u at index %u already on submit list\n",
 293                                 submit->bos[i].handle, i);
 294                 ret = -EINVAL;
 295         }
 296
 297         for (; i >= 0; i--)
 298                 submit_unlock_unpin_bo(submit, i);
 299
 300         if (slow_locked > 0)
 301                 submit_unlock_unpin_bo(submit, slow_locked);
 302
 303         if (ret == -EDEADLK) {
 304                 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
 305                 /* we lost out in a seqno race, lock and retry.. */
 306                 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
 307                                                        &submit->ticket);
 308                 if (!ret) {
 309                         submit->bos[contended].flags |= BO_LOCKED;
 310                         slow_locked = contended;
 311                         goto retry;
 312                 }
 313
 314                 /* Not expecting -EALREADY here, if the bo was already
 315                  * locked, we should have gotten -EALREADY already from
 316                  * the dma_resv_lock_interruptable() call.
 317                  */
 318                 WARN_ON_ONCE(ret == -EALREADY);
 319         }
 320
 321         return ret;
 322 }
 323
 324 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
 325 {
 326         int i, ret = 0;
 327
 328         for (i = 0; i < submit->nr_bos; i++) {
 329                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 330                 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
 331
 332                 if (!write) {
 333                         /* NOTE: _reserve_shared() must happen before
 334                          * _add_shared_fence(), which makes this a slightly
 335                          * strange place to call it.  OTOH this is a
 336                          * convenient can-fail point to hook it in.
 337                          */
 338                         ret = dma_resv_reserve_shared(obj->resv, 1);
 339                         if (ret)
 340                                 return ret;
 341                 }
 342
 343                 if (no_implicit)
 344                         continue;
 345
 346                 ret = drm_gem_fence_array_add_implicit(&submit->deps, obj,
 347                         write);
 348                 if (ret)
 349                         break;
 350         }
 351
 352         return ret;
 353 }
 354
 355 static int submit_pin_objects(struct msm_gem_submit *submit)
 356 {
 357         int i, ret = 0;
 358
 359         submit->valid = true;
 360
 361         /*
 362          * Increment active_count first, so if under memory pressure, we
 363          * don't inadvertently evict a bo needed by the submit in order
 364          * to pin an earlier bo in the same submit.
 365          */
 366         for (i = 0; i < submit->nr_bos; i++) {
 367                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 368
 369                 msm_gem_active_get(obj, submit->gpu);
 370                 submit->bos[i].flags |= BO_ACTIVE;
 371         }
 372
 373         for (i = 0; i < submit->nr_bos; i++) {
 374                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 375                 uint64_t iova;
 376
 377                 /* if locking succeeded, pin bo: */
 378                 ret = msm_gem_get_and_pin_iova_locked(obj,
 379                                 submit->aspace, &iova);
 380
 381                 if (ret)
 382                         break;
 383
 384                 submit->bos[i].flags |= BO_PINNED;
 385
 386                 if (iova == submit->bos[i].iova) {
 387                         submit->bos[i].flags |= BO_VALID;
 388                 } else {
 389                         submit->bos[i].iova = iova;
 390                         /* iova changed, so address in cmdstream is not valid: */
 391                         submit->bos[i].flags &= ~BO_VALID;
 392                         submit->valid = false;
 393                 }
 394         }
 395
 396         return ret;
 397 }
 398
 399 static void submit_attach_object_fences(struct msm_gem_submit *submit)
 400 {
 401         int i;
 402
 403         for (i = 0; i < submit->nr_bos; i++) {
 404                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 405
 406                 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
 407                         dma_resv_add_excl_fence(obj->resv, submit->user_fence);
 408                 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
 409                         dma_resv_add_shared_fence(obj->resv, submit->user_fence);
 410         }
 411 }
 412
 413 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 414                 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
 415 {
 416         if (idx >= submit->nr_bos) {
 417                 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
 418                                 idx, submit->nr_bos);
 419                 return -EINVAL;
 420         }
 421
 422         if (obj)
 423                 *obj = submit->bos[idx].obj;
 424         if (iova)
 425                 *iova = submit->bos[idx].iova;
 426         if (valid)
 427                 *valid = !!(submit->bos[idx].flags & BO_VALID);
 428
 429         return 0;
 430 }
 431
 432 /* process the reloc's and patch up the cmdstream as needed: */
 433 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
 434                 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
 435 {
 436         uint32_t i, last_offset = 0;
 437         uint32_t *ptr;
 438         int ret = 0;
 439
 440         if (!nr_relocs)
 441                 return 0;
 442
 443         if (offset % 4) {
 444                 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
 445                 return -EINVAL;
 446         }
 447
 448         /* For now, just map the entire thing.  Eventually we probably
 449          * to do it page-by-page, w/ kmap() if not vmap()d..
 450          */
 451         ptr = msm_gem_get_vaddr_locked(&obj->base);
 452
 453         if (IS_ERR(ptr)) {
 454                 ret = PTR_ERR(ptr);
 455                 DBG("failed to map: %d", ret);
 456                 return ret;
 457         }
 458
 459         for (i = 0; i < nr_relocs; i++) {
 460                 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
 461                 uint32_t off;
 462                 uint64_t iova;
 463                 bool valid;
 464
 465                 if (submit_reloc.submit_offset % 4) {
 466                         DRM_ERROR("non-aligned reloc offset: %u\n",
 467                                         submit_reloc.submit_offset);
 468                         ret = -EINVAL;
 469                         goto out;
 470                 }
 471
 472                 /* offset in dwords: */
 473                 off = submit_reloc.submit_offset / 4;
 474
 475                 if ((off >= (obj->base.size / 4)) ||
 476                                 (off < last_offset)) {
 477                         DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
 478                         ret = -EINVAL;
 479                         goto out;
 480                 }
 481
 482                 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
 483                 if (ret)
 484                         goto out;
 485
 486                 if (valid)
 487                         continue;
 488
 489                 iova += submit_reloc.reloc_offset;
 490
 491                 if (submit_reloc.shift < 0)
 492                         iova >>= -submit_reloc.shift;
 493                 else
 494                         iova <<= submit_reloc.shift;
 495
 496                 ptr[off] = iova | submit_reloc.or;
 497
 498                 last_offset = off;
 499         }
 500
 501 out:
 502         msm_gem_put_vaddr_locked(&obj->base);
 503
 504         return ret;
 505 }
 506
 507 /* Cleanup submit at end of ioctl.  In the error case, this also drops
 508  * references, unpins, and drops active refcnt.  In the non-error case,
 509  * this is done when the submit is retired.
 510  */
 511 static void submit_cleanup(struct msm_gem_submit *submit, bool error)
 512 {
 513         unsigned cleanup_flags = BO_LOCKED;
 514         unsigned i;
 515
 516         if (error)
 517                 cleanup_flags |= BO_PINNED | BO_ACTIVE;
 518
 519         for (i = 0; i < submit->nr_bos; i++) {
 520                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 521                 submit_cleanup_bo(submit, i, cleanup_flags);
 522                 if (error)
 523                         drm_gem_object_put(&msm_obj->base);
 524         }
 525 }
 526
 527 void msm_submit_retire(struct msm_gem_submit *submit)
 528 {
 529         int i;
 530
 531         for (i = 0; i < submit->nr_bos; i++) {
 532                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 533
 534                 msm_gem_lock(obj);
 535                 submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE);
 536                 msm_gem_unlock(obj);
 537                 drm_gem_object_put(obj);
 538         }
 539 }
 540
 541 struct msm_submit_post_dep {
 542         struct drm_syncobj *syncobj;
 543         uint64_t point;
 544         struct dma_fence_chain *chain;
 545 };
 546
 547 static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit,
 548                                            struct drm_file *file,
 549                                            uint64_t in_syncobjs_addr,
 550                                            uint32_t nr_in_syncobjs,
 551                                            size_t syncobj_stride,
 552                                            struct msm_ringbuffer *ring)
 553 {
 554         struct drm_syncobj **syncobjs = NULL;
 555         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 556         int ret = 0;
 557         uint32_t i, j;
 558
 559         syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
 560                            GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 561         if (!syncobjs)
 562                 return ERR_PTR(-ENOMEM);
 563
 564         for (i = 0; i < nr_in_syncobjs; ++i) {
 565                 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
 566                 struct dma_fence *fence;
 567
 568                 if (copy_from_user(&syncobj_desc,
 569                                    u64_to_user_ptr(address),
 570                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 571                         ret = -EFAULT;
 572                         break;
 573                 }
 574
 575                 if (syncobj_desc.point &&
 576                     !drm_core_check_feature(submit->dev, DRIVER_SYNCOBJ_TIMELINE)) {
 577                         ret = -EOPNOTSUPP;
 578                         break;
 579                 }
 580
 581                 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
 582                         ret = -EINVAL;
 583                         break;
 584                 }
 585
 586                 ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
 587                                              syncobj_desc.point, 0, &fence);
 588                 if (ret)
 589                         break;
 590
 591                 ret = drm_gem_fence_array_add(&submit->deps, fence);
 592                 if (ret)
 593                         break;
 594
 595                 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
 596                         syncobjs[i] =
 597                                 drm_syncobj_find(file, syncobj_desc.handle);
 598                         if (!syncobjs[i]) {
 599                                 ret = -EINVAL;
 600                                 break;
 601                         }
 602                 }
 603         }
 604
 605         if (ret) {
 606                 for (j = 0; j <= i; ++j) {
 607                         if (syncobjs[j])
 608                                 drm_syncobj_put(syncobjs[j]);
 609                 }
 610                 kfree(syncobjs);
 611                 return ERR_PTR(ret);
 612         }
 613         return syncobjs;
 614 }
 615
 616 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
 617                                uint32_t nr_syncobjs)
 618 {
 619         uint32_t i;
 620
 621         for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
 622                 if (syncobjs[i])
 623                         drm_syncobj_replace_fence(syncobjs[i], NULL);
 624         }
 625 }
 626
 627 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
 628                                                        struct drm_file *file,
 629                                                        uint64_t syncobjs_addr,
 630                                                        uint32_t nr_syncobjs,
 631                                                        size_t syncobj_stride)
 632 {
 633         struct msm_submit_post_dep *post_deps;
 634         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 635         int ret = 0;
 636         uint32_t i, j;
 637
 638         post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
 639                                   GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 640         if (!post_deps)
 641                 return ERR_PTR(-ENOMEM);
 642
 643         for (i = 0; i < nr_syncobjs; ++i) {
 644                 uint64_t address = syncobjs_addr + i * syncobj_stride;
 645
 646                 if (copy_from_user(&syncobj_desc,
 647                                    u64_to_user_ptr(address),
 648                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 649                         ret = -EFAULT;
 650                         break;
 651                 }
 652
 653                 post_deps[i].point = syncobj_desc.point;
 654                 post_deps[i].chain = NULL;
 655
 656                 if (syncobj_desc.flags) {
 657                         ret = -EINVAL;
 658                         break;
 659                 }
 660
 661                 if (syncobj_desc.point) {
 662                         if (!drm_core_check_feature(dev,
 663                                                     DRIVER_SYNCOBJ_TIMELINE)) {
 664                                 ret = -EOPNOTSUPP;
 665                                 break;
 666                         }
 667
 668                         post_deps[i].chain = dma_fence_chain_alloc();
 669                         if (!post_deps[i].chain) {
 670                                 ret = -ENOMEM;
 671                                 break;
 672                         }
 673                 }
 674
 675                 post_deps[i].syncobj =
 676                         drm_syncobj_find(file, syncobj_desc.handle);
 677                 if (!post_deps[i].syncobj) {
 678                         ret = -EINVAL;
 679                         break;
 680                 }
 681         }
 682
 683         if (ret) {
 684                 for (j = 0; j <= i; ++j) {
 685                         dma_fence_chain_free(post_deps[j].chain);
 686                         if (post_deps[j].syncobj)
 687                                 drm_syncobj_put(post_deps[j].syncobj);
 688                 }
 689
 690                 kfree(post_deps);
 691                 return ERR_PTR(ret);
 692         }
 693
 694         return post_deps;
 695 }
 696
 697 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
 698                                   uint32_t count, struct dma_fence *fence)
 699 {
 700         uint32_t i;
 701
 702         for (i = 0; post_deps && i < count; ++i) {
 703                 if (post_deps[i].chain) {
 704                         drm_syncobj_add_point(post_deps[i].syncobj,
 705                                               post_deps[i].chain,
 706                                               fence, post_deps[i].point);
 707                         post_deps[i].chain = NULL;
 708                 } else {
 709                         drm_syncobj_replace_fence(post_deps[i].syncobj,
 710                                                   fence);
 711                 }
 712         }
 713 }
 714
 715 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 716                 struct drm_file *file)
 717 {
 718         static atomic_t ident = ATOMIC_INIT(0);
 719         struct msm_drm_private *priv = dev->dev_private;
 720         struct drm_msm_gem_submit *args = data;
 721         struct msm_file_private *ctx = file->driver_priv;
 722         struct msm_gem_submit *submit = NULL;
 723         struct msm_gpu *gpu = priv->gpu;
 724         struct msm_gpu_submitqueue *queue;
 725         struct msm_ringbuffer *ring;
 726         struct msm_submit_post_dep *post_deps = NULL;
 727         struct drm_syncobj **syncobjs_to_reset = NULL;
 728         int out_fence_fd = -1;
 729         struct pid *pid = get_pid(task_pid(current));
 730         bool has_ww_ticket = false;
 731         unsigned i;
 732         int ret, submitid;
 733
 734         if (!gpu)
 735                 return -ENXIO;
 736
 737         if (args->pad)
 738                 return -EINVAL;
 739
 740         /* for now, we just have 3d pipe.. eventually this would need to
 741          * be more clever to dispatch to appropriate gpu module:
 742          */
 743         if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
 744                 return -EINVAL;
 745
 746         if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
 747                 return -EINVAL;
 748
 749         if (args->flags & MSM_SUBMIT_SUDO) {
 750                 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
 751                     !capable(CAP_SYS_RAWIO))
 752                         return -EINVAL;
 753         }
 754
 755         queue = msm_submitqueue_get(ctx, args->queueid);
 756         if (!queue)
 757                 return -ENOENT;
 758
 759         /* Get a unique identifier for the submission for logging purposes */
 760         submitid = atomic_inc_return(&ident) - 1;
 761
 762         ring = gpu->rb[queue->ring_nr];
 763         trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
 764                 args->nr_bos, args->nr_cmds);
 765
 766         ret = mutex_lock_interruptible(&queue->lock);
 767         if (ret)
 768                 goto out_post_unlock;
 769
 770         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 771                 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
 772                 if (out_fence_fd < 0) {
 773                         ret = out_fence_fd;
 774                         goto out_unlock;
 775                 }
 776         }
 777
 778         submit = submit_create(dev, gpu, queue, args->nr_bos,
 779                 args->nr_cmds);
 780         if (IS_ERR(submit)) {
 781                 ret = PTR_ERR(submit);
 782                 goto out_unlock;
 783         }
 784
 785         submit->pid = pid;
 786         submit->ident = submitid;
 787
 788         if (args->flags & MSM_SUBMIT_SUDO)
 789                 submit->in_rb = true;
 790
 791         if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
 792                 struct dma_fence *in_fence;
 793
 794                 in_fence = sync_file_get_fence(args->fence_fd);
 795
 796                 if (!in_fence) {
 797                         ret = -EINVAL;
 798                         goto out_unlock;
 799                 }
 800
 801                 ret = drm_gem_fence_array_add(&submit->deps, in_fence);
 802                 if (ret)
 803                         goto out_unlock;
 804         }
 805
 806         if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
 807                 syncobjs_to_reset = msm_parse_deps(submit, file,
 808                                                    args->in_syncobjs,
 809                                                    args->nr_in_syncobjs,
 810                                                    args->syncobj_stride, ring);
 811                 if (IS_ERR(syncobjs_to_reset)) {
 812                         ret = PTR_ERR(syncobjs_to_reset);
 813                         goto out_unlock;
 814                 }
 815         }
 816
 817         if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
 818                 post_deps = msm_parse_post_deps(dev, file,
 819                                                 args->out_syncobjs,
 820                                                 args->nr_out_syncobjs,
 821                                                 args->syncobj_stride);
 822                 if (IS_ERR(post_deps)) {
 823                         ret = PTR_ERR(post_deps);
 824                         goto out_unlock;
 825                 }
 826         }
 827
 828         ret = submit_lookup_objects(submit, args, file);
 829         if (ret)
 830                 goto out;
 831
 832         ret = submit_lookup_cmds(submit, args, file);
 833         if (ret)
 834                 goto out;
 835
 836         /* copy_*_user while holding a ww ticket upsets lockdep */
 837         ww_acquire_init(&submit->ticket, &reservation_ww_class);
 838         has_ww_ticket = true;
 839         ret = submit_lock_objects(submit);
 840         if (ret)
 841                 goto out;
 842
 843         ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
 844         if (ret)
 845                 goto out;
 846
 847         ret = submit_pin_objects(submit);
 848         if (ret)
 849                 goto out;
 850
 851         for (i = 0; i < args->nr_cmds; i++) {
 852                 struct msm_gem_object *msm_obj;
 853                 uint64_t iova;
 854
 855                 ret = submit_bo(submit, submit->cmd[i].idx,
 856                                 &msm_obj, &iova, NULL);
 857                 if (ret)
 858                         goto out;
 859
 860                 if (!submit->cmd[i].size ||
 861                         ((submit->cmd[i].size + submit->cmd[i].offset) >
 862                                 msm_obj->base.size / 4)) {
 863                         DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
 864                         ret = -EINVAL;
 865                         goto out;
 866                 }
 867
 868                 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
 869
 870                 if (submit->valid)
 871                         continue;
 872
 873                 ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4,
 874                                 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
 875                 if (ret)
 876                         goto out;
 877         }
 878
 879         submit->nr_cmds = i;
 880
 881         submit->user_fence = dma_fence_get(&submit->base.s_fence->finished);
 882
 883         /*
 884          * Allocate an id which can be used by WAIT_FENCE ioctl to map back
 885          * to the underlying fence.
 886          */
 887         submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
 888                         submit->user_fence, 0, INT_MAX, GFP_KERNEL);
 889         if (submit->fence_id < 0) {
 890                 ret = submit->fence_id = 0;
 891                 submit->fence_id = 0;
 892                 goto out;
 893         }
 894
 895         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 896                 struct sync_file *sync_file = sync_file_create(submit->user_fence);
 897                 if (!sync_file) {
 898                         ret = -ENOMEM;
 899                         goto out;
 900                 }
 901                 fd_install(out_fence_fd, sync_file->file);
 902                 args->fence_fd = out_fence_fd;
 903         }
 904
 905         submit_attach_object_fences(submit);
 906
 907         /* The scheduler owns a ref now: */
 908         msm_gem_submit_get(submit);
 909
 910         drm_sched_entity_push_job(&submit->base, &queue->entity);
 911
 912         args->fence = submit->fence_id;
 913
 914         msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
 915         msm_process_post_deps(post_deps, args->nr_out_syncobjs,
 916                               submit->user_fence);
 917
 918
 919 out:
 920         submit_cleanup(submit, !!ret);
 921         if (has_ww_ticket)
 922                 ww_acquire_fini(&submit->ticket);
 923 out_unlock:
 924         if (ret && (out_fence_fd >= 0))
 925                 put_unused_fd(out_fence_fd);
 926         mutex_unlock(&queue->lock);
 927         if (submit)
 928                 msm_gem_submit_put(submit);
 929 out_post_unlock:
 930         if (!IS_ERR_OR_NULL(post_deps)) {
 931                 for (i = 0; i < args->nr_out_syncobjs; ++i) {
 932                         kfree(post_deps[i].chain);
 933                         drm_syncobj_put(post_deps[i].syncobj);
 934                 }
 935                 kfree(post_deps);
 936         }
 937
 938         if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
 939                 for (i = 0; i < args->nr_in_syncobjs; ++i) {
 940                         if (syncobjs_to_reset[i])
 941                                 drm_syncobj_put(syncobjs_to_reset[i]);
 942                 }
 943                 kfree(syncobjs_to_reset);
 944         }
 945
 946         return ret;
 947 }