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 static struct msm_gem_submit *submit_create(struct drm_device *dev,
  25                 struct msm_gpu *gpu,
  26                 struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
  27                 uint32_t nr_cmds)
  28 {
  29         static atomic_t ident = ATOMIC_INIT(0);
  30         struct msm_gem_submit *submit;
  31         uint64_t sz;
  32         int ret;
  33
  34         sz = struct_size(submit, bos, nr_bos) +
  35                         ((u64)nr_cmds * sizeof(submit->cmd[0]));
  36
  37         if (sz > SIZE_MAX)
  38                 return ERR_PTR(-ENOMEM);
  39
  40         submit = kzalloc(sz, GFP_KERNEL);
  41         if (!submit)
  42                 return ERR_PTR(-ENOMEM);
  43
  44         ret = drm_sched_job_init(&submit->base, queue->entity, queue);
  45         if (ret) {
  46                 kfree(submit);
  47                 return ERR_PTR(ret);
  48         }
  49
  50         kref_init(&submit->ref);
  51         submit->dev = dev;
  52         submit->aspace = queue->ctx->aspace;
  53         submit->gpu = gpu;
  54         submit->cmd = (void *)&submit->bos[nr_bos];
  55         submit->queue = queue;
  56         submit->pid = get_pid(task_pid(current));
  57         submit->ring = gpu->rb[queue->ring_nr];
  58         submit->fault_dumped = false;
  59
  60         /* Get a unique identifier for the submission for logging purposes */
  61         submit->ident = atomic_inc_return(&ident) - 1;
  62
  63         INIT_LIST_HEAD(&submit->node);
  64
  65         return submit;
  66 }
  67
  68 void __msm_gem_submit_destroy(struct kref *kref)
  69 {
  70         struct msm_gem_submit *submit =
  71                         container_of(kref, struct msm_gem_submit, ref);
  72         unsigned i;
  73
  74         if (submit->fence_id) {
  75                 mutex_lock(&submit->queue->idr_lock);
  76                 idr_remove(&submit->queue->fence_idr, submit->fence_id);
  77                 mutex_unlock(&submit->queue->idr_lock);
  78         }
  79
  80         dma_fence_put(submit->user_fence);
  81         dma_fence_put(submit->hw_fence);
  82
  83         put_pid(submit->pid);
  84         msm_submitqueue_put(submit->queue);
  85
  86         for (i = 0; i < submit->nr_cmds; i++)
  87                 kfree(submit->cmd[i].relocs);
  88
  89         kfree(submit);
  90 }
  91
  92 static int submit_lookup_objects(struct msm_gem_submit *submit,
  93                 struct drm_msm_gem_submit *args, struct drm_file *file)
  94 {
  95         unsigned i;
  96         int ret = 0;
  97
  98         for (i = 0; i < args->nr_bos; i++) {
  99                 struct drm_msm_gem_submit_bo submit_bo;
 100                 void __user *userptr =
 101                         u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
 102
 103                 /* make sure we don't have garbage flags, in case we hit
 104                  * error path before flags is initialized:
 105                  */
 106                 submit->bos[i].flags = 0;
 107
 108                 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
 109                         ret = -EFAULT;
 110                         i = 0;
 111                         goto out;
 112                 }
 113
 114 /* at least one of READ and/or WRITE flags should be set: */
 115 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
 116
 117                 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
 118                         !(submit_bo.flags & MANDATORY_FLAGS)) {
 119                         DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
 120                         ret = -EINVAL;
 121                         i = 0;
 122                         goto out;
 123                 }
 124
 125                 submit->bos[i].handle = submit_bo.handle;
 126                 submit->bos[i].flags = submit_bo.flags;
 127                 /* in validate_objects() we figure out if this is true: */
 128                 submit->bos[i].iova  = submit_bo.presumed;
 129         }
 130
 131         spin_lock(&file->table_lock);
 132
 133         for (i = 0; i < args->nr_bos; i++) {
 134                 struct drm_gem_object *obj;
 135
 136                 /* normally use drm_gem_object_lookup(), but for bulk lookup
 137                  * all under single table_lock just hit object_idr directly:
 138                  */
 139                 obj = idr_find(&file->object_idr, submit->bos[i].handle);
 140                 if (!obj) {
 141                         DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
 142                         ret = -EINVAL;
 143                         goto out_unlock;
 144                 }
 145
 146                 drm_gem_object_get(obj);
 147
 148                 submit->bos[i].obj = to_msm_bo(obj);
 149         }
 150
 151 out_unlock:
 152         spin_unlock(&file->table_lock);
 153
 154 out:
 155         submit->nr_bos = i;
 156
 157         return ret;
 158 }
 159
 160 static int submit_lookup_cmds(struct msm_gem_submit *submit,
 161                 struct drm_msm_gem_submit *args, struct drm_file *file)
 162 {
 163         unsigned i;
 164         size_t sz;
 165         int ret = 0;
 166
 167         for (i = 0; i < args->nr_cmds; i++) {
 168                 struct drm_msm_gem_submit_cmd submit_cmd;
 169                 void __user *userptr =
 170                         u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
 171
 172                 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
 173                 if (ret) {
 174                         ret = -EFAULT;
 175                         goto out;
 176                 }
 177
 178                 /* validate input from userspace: */
 179                 switch (submit_cmd.type) {
 180                 case MSM_SUBMIT_CMD_BUF:
 181                 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
 182                 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 183                         break;
 184                 default:
 185                         DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
 186                         return -EINVAL;
 187                 }
 188
 189                 if (submit_cmd.size % 4) {
 190                         DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
 191                                         submit_cmd.size);
 192                         ret = -EINVAL;
 193                         goto out;
 194                 }
 195
 196                 submit->cmd[i].type = submit_cmd.type;
 197                 submit->cmd[i].size = submit_cmd.size / 4;
 198                 submit->cmd[i].offset = submit_cmd.submit_offset / 4;
 199                 submit->cmd[i].idx  = submit_cmd.submit_idx;
 200                 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
 201
 202                 userptr = u64_to_user_ptr(submit_cmd.relocs);
 203
 204                 sz = array_size(submit_cmd.nr_relocs,
 205                                 sizeof(struct drm_msm_gem_submit_reloc));
 206                 /* check for overflow: */
 207                 if (sz == SIZE_MAX) {
 208                         ret = -ENOMEM;
 209                         goto out;
 210                 }
 211                 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
 212                 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
 213                 if (ret) {
 214                         ret = -EFAULT;
 215                         goto out;
 216                 }
 217         }
 218
 219 out:
 220         return ret;
 221 }
 222
 223 /* Unwind bo state, according to cleanup_flags.  In the success case, only
 224  * the lock is dropped at the end of the submit (and active/pin ref is dropped
 225  * later when the submit is retired).
 226  */
 227 static void submit_cleanup_bo(struct msm_gem_submit *submit, int i,
 228                 unsigned cleanup_flags)
 229 {
 230         struct drm_gem_object *obj = &submit->bos[i].obj->base;
 231         unsigned flags = submit->bos[i].flags & cleanup_flags;
 232
 233         /*
 234          * Clear flags bit before dropping lock, so that the msm_job_run()
 235          * path isn't racing with submit_cleanup() (ie. the read/modify/
 236          * write is protected by the obj lock in all paths)
 237          */
 238         submit->bos[i].flags &= ~cleanup_flags;
 239
 240         if (flags & BO_VMA_PINNED)
 241                 msm_gem_unpin_vma(submit->bos[i].vma);
 242
 243         if (flags & BO_OBJ_PINNED)
 244                 msm_gem_unpin_locked(obj);
 245
 246         if (flags & BO_LOCKED)
 247                 dma_resv_unlock(obj->resv);
 248 }
 249
 250 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
 251 {
 252         unsigned cleanup_flags = BO_VMA_PINNED | BO_OBJ_PINNED | BO_LOCKED;
 253         submit_cleanup_bo(submit, i, cleanup_flags);
 254
 255         if (!(submit->bos[i].flags & BO_VALID))
 256                 submit->bos[i].iova = 0;
 257 }
 258
 259 /* This is where we make sure all the bo's are reserved and pin'd: */
 260 static int submit_lock_objects(struct msm_gem_submit *submit)
 261 {
 262         int contended, slow_locked = -1, i, ret = 0;
 263
 264 retry:
 265         for (i = 0; i < submit->nr_bos; i++) {
 266                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 267
 268                 if (slow_locked == i)
 269                         slow_locked = -1;
 270
 271                 contended = i;
 272
 273                 if (!(submit->bos[i].flags & BO_LOCKED)) {
 274                         ret = dma_resv_lock_interruptible(msm_obj->base.resv,
 275                                                           &submit->ticket);
 276                         if (ret)
 277                                 goto fail;
 278                         submit->bos[i].flags |= BO_LOCKED;
 279                 }
 280         }
 281
 282         ww_acquire_done(&submit->ticket);
 283
 284         return 0;
 285
 286 fail:
 287         if (ret == -EALREADY) {
 288                 DRM_ERROR("handle %u at index %u already on submit list\n",
 289                                 submit->bos[i].handle, i);
 290                 ret = -EINVAL;
 291         }
 292
 293         for (; i >= 0; i--)
 294                 submit_unlock_unpin_bo(submit, i);
 295
 296         if (slow_locked > 0)
 297                 submit_unlock_unpin_bo(submit, slow_locked);
 298
 299         if (ret == -EDEADLK) {
 300                 struct msm_gem_object *msm_obj = submit->bos[contended].obj;
 301                 /* we lost out in a seqno race, lock and retry.. */
 302                 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
 303                                                        &submit->ticket);
 304                 if (!ret) {
 305                         submit->bos[contended].flags |= BO_LOCKED;
 306                         slow_locked = contended;
 307                         goto retry;
 308                 }
 309
 310                 /* Not expecting -EALREADY here, if the bo was already
 311                  * locked, we should have gotten -EALREADY already from
 312                  * the dma_resv_lock_interruptable() call.
 313                  */
 314                 WARN_ON_ONCE(ret == -EALREADY);
 315         }
 316
 317         return ret;
 318 }
 319
 320 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
 321 {
 322         int i, ret = 0;
 323
 324         for (i = 0; i < submit->nr_bos; i++) {
 325                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 326                 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
 327
 328                 /* NOTE: _reserve_shared() must happen before
 329                  * _add_shared_fence(), which makes this a slightly
 330                  * strange place to call it.  OTOH this is a
 331                  * convenient can-fail point to hook it in.
 332                  */
 333                 ret = dma_resv_reserve_fences(obj->resv, 1);
 334                 if (ret)
 335                         return ret;
 336
 337                 /* exclusive fences must be ordered */
 338                 if (no_implicit && !write)
 339                         continue;
 340
 341                 ret = drm_sched_job_add_implicit_dependencies(&submit->base,
 342                                                               obj,
 343                                                               write);
 344                 if (ret)
 345                         break;
 346         }
 347
 348         return ret;
 349 }
 350
 351 static int submit_pin_objects(struct msm_gem_submit *submit)
 352 {
 353         int i, ret = 0;
 354
 355         submit->valid = true;
 356
 357         for (i = 0; i < submit->nr_bos; i++) {
 358                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 359                 struct msm_gem_vma *vma;
 360
 361                 /* if locking succeeded, pin bo: */
 362                 vma = msm_gem_get_vma_locked(obj, submit->aspace);
 363                 if (IS_ERR(vma)) {
 364                         ret = PTR_ERR(vma);
 365                         break;
 366                 }
 367
 368                 ret = msm_gem_pin_vma_locked(obj, vma);
 369                 if (ret)
 370                         break;
 371
 372                 submit->bos[i].flags |= BO_OBJ_PINNED | BO_VMA_PINNED;
 373                 submit->bos[i].vma = vma;
 374
 375                 if (vma->iova == submit->bos[i].iova) {
 376                         submit->bos[i].flags |= BO_VALID;
 377                 } else {
 378                         submit->bos[i].iova = vma->iova;
 379                         /* iova changed, so address in cmdstream is not valid: */
 380                         submit->bos[i].flags &= ~BO_VALID;
 381                         submit->valid = false;
 382                 }
 383         }
 384
 385         return ret;
 386 }
 387
 388 static void submit_attach_object_fences(struct msm_gem_submit *submit)
 389 {
 390         int i;
 391
 392         for (i = 0; i < submit->nr_bos; i++) {
 393                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 394
 395                 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
 396                         dma_resv_add_fence(obj->resv, submit->user_fence,
 397                                            DMA_RESV_USAGE_WRITE);
 398                 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
 399                         dma_resv_add_fence(obj->resv, submit->user_fence,
 400                                            DMA_RESV_USAGE_READ);
 401         }
 402 }
 403
 404 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 405                 struct msm_gem_object **obj, uint64_t *iova, bool *valid)
 406 {
 407         if (idx >= submit->nr_bos) {
 408                 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
 409                                 idx, submit->nr_bos);
 410                 return -EINVAL;
 411         }
 412
 413         if (obj)
 414                 *obj = submit->bos[idx].obj;
 415         if (iova)
 416                 *iova = submit->bos[idx].iova;
 417         if (valid)
 418                 *valid = !!(submit->bos[idx].flags & BO_VALID);
 419
 420         return 0;
 421 }
 422
 423 /* process the reloc's and patch up the cmdstream as needed: */
 424 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
 425                 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
 426 {
 427         uint32_t i, last_offset = 0;
 428         uint32_t *ptr;
 429         int ret = 0;
 430
 431         if (!nr_relocs)
 432                 return 0;
 433
 434         if (offset % 4) {
 435                 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
 436                 return -EINVAL;
 437         }
 438
 439         /* For now, just map the entire thing.  Eventually we probably
 440          * to do it page-by-page, w/ kmap() if not vmap()d..
 441          */
 442         ptr = msm_gem_get_vaddr_locked(&obj->base);
 443
 444         if (IS_ERR(ptr)) {
 445                 ret = PTR_ERR(ptr);
 446                 DBG("failed to map: %d", ret);
 447                 return ret;
 448         }
 449
 450         for (i = 0; i < nr_relocs; i++) {
 451                 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
 452                 uint32_t off;
 453                 uint64_t iova;
 454                 bool valid;
 455
 456                 if (submit_reloc.submit_offset % 4) {
 457                         DRM_ERROR("non-aligned reloc offset: %u\n",
 458                                         submit_reloc.submit_offset);
 459                         ret = -EINVAL;
 460                         goto out;
 461                 }
 462
 463                 /* offset in dwords: */
 464                 off = submit_reloc.submit_offset / 4;
 465
 466                 if ((off >= (obj->base.size / 4)) ||
 467                                 (off < last_offset)) {
 468                         DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
 469                         ret = -EINVAL;
 470                         goto out;
 471                 }
 472
 473                 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
 474                 if (ret)
 475                         goto out;
 476
 477                 if (valid)
 478                         continue;
 479
 480                 iova += submit_reloc.reloc_offset;
 481
 482                 if (submit_reloc.shift < 0)
 483                         iova >>= -submit_reloc.shift;
 484                 else
 485                         iova <<= submit_reloc.shift;
 486
 487                 ptr[off] = iova | submit_reloc.or;
 488
 489                 last_offset = off;
 490         }
 491
 492 out:
 493         msm_gem_put_vaddr_locked(&obj->base);
 494
 495         return ret;
 496 }
 497
 498 /* Cleanup submit at end of ioctl.  In the error case, this also drops
 499  * references, unpins, and drops active refcnt.  In the non-error case,
 500  * this is done when the submit is retired.
 501  */
 502 static void submit_cleanup(struct msm_gem_submit *submit, bool error)
 503 {
 504         unsigned cleanup_flags = BO_LOCKED | BO_OBJ_PINNED;
 505         unsigned i;
 506
 507         if (error)
 508                 cleanup_flags |= BO_VMA_PINNED;
 509
 510         for (i = 0; i < submit->nr_bos; i++) {
 511                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 512                 submit_cleanup_bo(submit, i, cleanup_flags);
 513                 if (error)
 514                         drm_gem_object_put(&msm_obj->base);
 515         }
 516 }
 517
 518 void msm_submit_retire(struct msm_gem_submit *submit)
 519 {
 520         int i;
 521
 522         for (i = 0; i < submit->nr_bos; i++) {
 523                 struct drm_gem_object *obj = &submit->bos[i].obj->base;
 524
 525                 drm_gem_object_put(obj);
 526         }
 527 }
 528
 529 struct msm_submit_post_dep {
 530         struct drm_syncobj *syncobj;
 531         uint64_t point;
 532         struct dma_fence_chain *chain;
 533 };
 534
 535 static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit,
 536                                            struct drm_file *file,
 537                                            uint64_t in_syncobjs_addr,
 538                                            uint32_t nr_in_syncobjs,
 539                                            size_t syncobj_stride,
 540                                            struct msm_ringbuffer *ring)
 541 {
 542         struct drm_syncobj **syncobjs = NULL;
 543         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 544         int ret = 0;
 545         uint32_t i, j;
 546
 547         syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
 548                            GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 549         if (!syncobjs)
 550                 return ERR_PTR(-ENOMEM);
 551
 552         for (i = 0; i < nr_in_syncobjs; ++i) {
 553                 uint64_t address = in_syncobjs_addr + i * syncobj_stride;
 554                 struct dma_fence *fence;
 555
 556                 if (copy_from_user(&syncobj_desc,
 557                                    u64_to_user_ptr(address),
 558                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 559                         ret = -EFAULT;
 560                         break;
 561                 }
 562
 563                 if (syncobj_desc.point &&
 564                     !drm_core_check_feature(submit->dev, DRIVER_SYNCOBJ_TIMELINE)) {
 565                         ret = -EOPNOTSUPP;
 566                         break;
 567                 }
 568
 569                 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
 570                         ret = -EINVAL;
 571                         break;
 572                 }
 573
 574                 ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
 575                                              syncobj_desc.point, 0, &fence);
 576                 if (ret)
 577                         break;
 578
 579                 ret = drm_sched_job_add_dependency(&submit->base, fence);
 580                 if (ret)
 581                         break;
 582
 583                 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
 584                         syncobjs[i] =
 585                                 drm_syncobj_find(file, syncobj_desc.handle);
 586                         if (!syncobjs[i]) {
 587                                 ret = -EINVAL;
 588                                 break;
 589                         }
 590                 }
 591         }
 592
 593         if (ret) {
 594                 for (j = 0; j <= i; ++j) {
 595                         if (syncobjs[j])
 596                                 drm_syncobj_put(syncobjs[j]);
 597                 }
 598                 kfree(syncobjs);
 599                 return ERR_PTR(ret);
 600         }
 601         return syncobjs;
 602 }
 603
 604 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
 605                                uint32_t nr_syncobjs)
 606 {
 607         uint32_t i;
 608
 609         for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
 610                 if (syncobjs[i])
 611                         drm_syncobj_replace_fence(syncobjs[i], NULL);
 612         }
 613 }
 614
 615 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
 616                                                        struct drm_file *file,
 617                                                        uint64_t syncobjs_addr,
 618                                                        uint32_t nr_syncobjs,
 619                                                        size_t syncobj_stride)
 620 {
 621         struct msm_submit_post_dep *post_deps;
 622         struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
 623         int ret = 0;
 624         uint32_t i, j;
 625
 626         post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps),
 627                                   GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
 628         if (!post_deps)
 629                 return ERR_PTR(-ENOMEM);
 630
 631         for (i = 0; i < nr_syncobjs; ++i) {
 632                 uint64_t address = syncobjs_addr + i * syncobj_stride;
 633
 634                 if (copy_from_user(&syncobj_desc,
 635                                    u64_to_user_ptr(address),
 636                                    min(syncobj_stride, sizeof(syncobj_desc)))) {
 637                         ret = -EFAULT;
 638                         break;
 639                 }
 640
 641                 post_deps[i].point = syncobj_desc.point;
 642                 post_deps[i].chain = NULL;
 643
 644                 if (syncobj_desc.flags) {
 645                         ret = -EINVAL;
 646                         break;
 647                 }
 648
 649                 if (syncobj_desc.point) {
 650                         if (!drm_core_check_feature(dev,
 651                                                     DRIVER_SYNCOBJ_TIMELINE)) {
 652                                 ret = -EOPNOTSUPP;
 653                                 break;
 654                         }
 655
 656                         post_deps[i].chain = dma_fence_chain_alloc();
 657                         if (!post_deps[i].chain) {
 658                                 ret = -ENOMEM;
 659                                 break;
 660                         }
 661                 }
 662
 663                 post_deps[i].syncobj =
 664                         drm_syncobj_find(file, syncobj_desc.handle);
 665                 if (!post_deps[i].syncobj) {
 666                         ret = -EINVAL;
 667                         break;
 668                 }
 669         }
 670
 671         if (ret) {
 672                 for (j = 0; j <= i; ++j) {
 673                         dma_fence_chain_free(post_deps[j].chain);
 674                         if (post_deps[j].syncobj)
 675                                 drm_syncobj_put(post_deps[j].syncobj);
 676                 }
 677
 678                 kfree(post_deps);
 679                 return ERR_PTR(ret);
 680         }
 681
 682         return post_deps;
 683 }
 684
 685 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
 686                                   uint32_t count, struct dma_fence *fence)
 687 {
 688         uint32_t i;
 689
 690         for (i = 0; post_deps && i < count; ++i) {
 691                 if (post_deps[i].chain) {
 692                         drm_syncobj_add_point(post_deps[i].syncobj,
 693                                               post_deps[i].chain,
 694                                               fence, post_deps[i].point);
 695                         post_deps[i].chain = NULL;
 696                 } else {
 697                         drm_syncobj_replace_fence(post_deps[i].syncobj,
 698                                                   fence);
 699                 }
 700         }
 701 }
 702
 703 int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 704                 struct drm_file *file)
 705 {
 706         struct msm_drm_private *priv = dev->dev_private;
 707         struct drm_msm_gem_submit *args = data;
 708         struct msm_file_private *ctx = file->driver_priv;
 709         struct msm_gem_submit *submit = NULL;
 710         struct msm_gpu *gpu = priv->gpu;
 711         struct msm_gpu_submitqueue *queue;
 712         struct msm_ringbuffer *ring;
 713         struct msm_submit_post_dep *post_deps = NULL;
 714         struct drm_syncobj **syncobjs_to_reset = NULL;
 715         int out_fence_fd = -1;
 716         bool has_ww_ticket = false;
 717         unsigned i;
 718         int ret;
 719
 720         if (!gpu)
 721                 return -ENXIO;
 722
 723         if (args->pad)
 724                 return -EINVAL;
 725
 726         if (unlikely(!ctx->aspace) && !capable(CAP_SYS_RAWIO)) {
 727                 DRM_ERROR_RATELIMITED("IOMMU support or CAP_SYS_RAWIO required!\n");
 728                 return -EPERM;
 729         }
 730
 731         /* for now, we just have 3d pipe.. eventually this would need to
 732          * be more clever to dispatch to appropriate gpu module:
 733          */
 734         if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
 735                 return -EINVAL;
 736
 737         if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
 738                 return -EINVAL;
 739
 740         if (args->flags & MSM_SUBMIT_SUDO) {
 741                 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
 742                     !capable(CAP_SYS_RAWIO))
 743                         return -EINVAL;
 744         }
 745
 746         queue = msm_submitqueue_get(ctx, args->queueid);
 747         if (!queue)
 748                 return -ENOENT;
 749
 750         ring = gpu->rb[queue->ring_nr];
 751
 752         if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 753                 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
 754                 if (out_fence_fd < 0) {
 755                         ret = out_fence_fd;
 756                         return ret;
 757                 }
 758         }
 759
 760         submit = submit_create(dev, gpu, queue, args->nr_bos, args->nr_cmds);
 761         if (IS_ERR(submit))
 762                 return PTR_ERR(submit);
 763
 764         trace_msm_gpu_submit(pid_nr(submit->pid), ring->id, submit->ident,
 765                 args->nr_bos, args->nr_cmds);
 766
 767         ret = mutex_lock_interruptible(&queue->lock);
 768         if (ret)
 769                 goto out_post_unlock;
 770
 771         if (args->flags & MSM_SUBMIT_SUDO)
 772                 submit->in_rb = true;
 773
 774         if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
 775                 struct dma_fence *in_fence;
 776
 777                 in_fence = sync_file_get_fence(args->fence_fd);
 778
 779                 if (!in_fence) {
 780                         ret = -EINVAL;
 781                         goto out_unlock;
 782                 }
 783
 784                 ret = drm_sched_job_add_dependency(&submit->base, in_fence);
 785                 if (ret)
 786                         goto out_unlock;
 787         }
 788
 789         if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
 790                 syncobjs_to_reset = msm_parse_deps(submit, file,
 791                                                    args->in_syncobjs,
 792                                                    args->nr_in_syncobjs,
 793                                                    args->syncobj_stride, ring);
 794                 if (IS_ERR(syncobjs_to_reset)) {
 795                         ret = PTR_ERR(syncobjs_to_reset);
 796                         goto out_unlock;
 797                 }
 798         }
 799
 800         if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
 801                 post_deps = msm_parse_post_deps(dev, file,
 802                                                 args->out_syncobjs,
 803                                                 args->nr_out_syncobjs,
 804                                                 args->syncobj_stride);
 805                 if (IS_ERR(post_deps)) {
 806                         ret = PTR_ERR(post_deps);
 807                         goto out_unlock;
 808                 }
 809         }
 810
 811         ret = submit_lookup_objects(submit, args, file);
 812         if (ret)
 813                 goto out;
 814
 815         ret = submit_lookup_cmds(submit, args, file);
 816         if (ret)
 817                 goto out;
 818
 819         /* copy_*_user while holding a ww ticket upsets lockdep */
 820         ww_acquire_init(&submit->ticket, &reservation_ww_class);
 821         has_ww_ticket = true;
 822         ret = submit_lock_objects(submit);
 823         if (ret)
 824                 goto out;
 825
 826         ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
 827         if (ret)
 828                 goto out;
 829
 830         ret = submit_pin_objects(submit);
 831         if (ret)
 832                 goto out;
 833
 834         for (i = 0; i < args->nr_cmds; i++) {
 835                 struct msm_gem_object *msm_obj;
 836                 uint64_t iova;
 837
 838                 ret = submit_bo(submit, submit->cmd[i].idx,
 839                                 &msm_obj, &iova, NULL);
 840                 if (ret)
 841                         goto out;
 842
 843                 if (!submit->cmd[i].size ||
 844                         ((submit->cmd[i].size + submit->cmd[i].offset) >
 845                                 msm_obj->base.size / 4)) {
 846                         DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
 847                         ret = -EINVAL;
 848                         goto out;
 849                 }
 850
 851                 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
 852
 853                 if (submit->valid)
 854                         continue;
 855
 856                 ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4,
 857                                 submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
 858                 if (ret)
 859                         goto out;
 860         }
 861
 862         submit->nr_cmds = i;
 863
 864         mutex_lock(&queue->idr_lock);
 865
 866         /*
 867          * If using userspace provided seqno fence, validate that the id
 868          * is available before arming sched job.  Since access to fence_idr
 869          * is serialized on the queue lock, the slot should be still avail
 870          * after the job is armed
 871          */
 872         if ((args->flags & MSM_SUBMIT_FENCE_SN_IN) &&
 873                         idr_find(&queue->fence_idr, args->fence)) {
 874                 mutex_unlock(&queue->idr_lock);
 875                 ret = -EINVAL;
 876                 goto out;
 877         }
 878
 879         drm_sched_job_arm(&submit->base);
 880
 881         submit->user_fence = dma_fence_get(&submit->base.s_fence->finished);
 882
 883         if (args->flags & MSM_SUBMIT_FENCE_SN_IN) {
 884                 /*
 885                  * Userspace has assigned the seqno fence that it wants
 886                  * us to use.  It is an error to pick a fence sequence
 887                  * number that is not available.
 888                  */
 889                 submit->fence_id = args->fence;
 890                 ret = idr_alloc_u32(&queue->fence_idr, submit->user_fence,
 891                                     &submit->fence_id, submit->fence_id,
 892                                     GFP_KERNEL);
 893                 /*
 894                  * We've already validated that the fence_id slot is valid,
 895                  * so if idr_alloc_u32 failed, it is a kernel bug
 896                  */
 897                 WARN_ON(ret);
 898         } else {
 899                 /*
 900                  * Allocate an id which can be used by WAIT_FENCE ioctl to map
 901                  * back to the underlying fence.
 902                  */
 903                 submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
 904                                                     submit->user_fence, 1,
 905                                                     INT_MAX, GFP_KERNEL);
 906         }
 907
 908         mutex_unlock(&queue->idr_lock);
 909
 910         if (submit->fence_id < 0) {
 911                 ret = submit->fence_id;
 912                 submit->fence_id = 0;
 913         }
 914
 915         if (ret == 0 && args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
 916                 struct sync_file *sync_file = sync_file_create(submit->user_fence);
 917                 if (!sync_file) {
 918                         ret = -ENOMEM;
 919                 } else {
 920                         fd_install(out_fence_fd, sync_file->file);
 921                         args->fence_fd = out_fence_fd;
 922                 }
 923         }
 924
 925         submit_attach_object_fences(submit);
 926
 927         /* The scheduler owns a ref now: */
 928         msm_gem_submit_get(submit);
 929
 930         drm_sched_entity_push_job(&submit->base);
 931
 932         args->fence = submit->fence_id;
 933         queue->last_fence = submit->fence_id;
 934
 935         msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
 936         msm_process_post_deps(post_deps, args->nr_out_syncobjs,
 937                               submit->user_fence);
 938
 939
 940 out:
 941         submit_cleanup(submit, !!ret);
 942         if (has_ww_ticket)
 943                 ww_acquire_fini(&submit->ticket);
 944 out_unlock:
 945         if (ret && (out_fence_fd >= 0))
 946                 put_unused_fd(out_fence_fd);
 947         mutex_unlock(&queue->lock);
 948 out_post_unlock:
 949         if (submit)
 950                 msm_gem_submit_put(submit);
 951         if (!IS_ERR_OR_NULL(post_deps)) {
 952                 for (i = 0; i < args->nr_out_syncobjs; ++i) {
 953                         kfree(post_deps[i].chain);
 954                         drm_syncobj_put(post_deps[i].syncobj);
 955                 }
 956                 kfree(post_deps);
 957         }
 958
 959         if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
 960                 for (i = 0; i < args->nr_in_syncobjs; ++i) {
 961                         if (syncobjs_to_reset[i])
 962                                 drm_syncobj_put(syncobjs_to_reset[i]);
 963                 }
 964                 kfree(syncobjs_to_reset);
 965         }
 966
 967         return ret;
 968 }