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 /* 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(err, submit, fmt, ...) \ 24 UERR(err, (submit)->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 /* 89 * In error paths, we could unref the submit without calling 90 * drm_sched_entity_push_job(), so msm_job_free() will never 91 * get called. Since drm_sched_job_cleanup() will NULL out 92 * s_fence, we can use that to detect this case. 93 */ 94 if (submit->base.s_fence) 95 drm_sched_job_cleanup(&submit->base); 96 97 if (submit->fence_id) { 98 spin_lock(&submit->queue->idr_lock); 99 idr_remove(&submit->queue->fence_idr, submit->fence_id); 100 spin_unlock(&submit->queue->idr_lock); 101 } 102 103 dma_fence_put(submit->user_fence); 104 105 /* 106 * If the submit is freed before msm_job_run(), then hw_fence is 107 * just some pre-allocated memory, not a reference counted fence. 108 * Once the job runs and the hw_fence is initialized, it will 109 * have a refcount of at least one, since the submit holds a ref 110 * to the hw_fence. 111 */ 112 if (kref_read(&submit->hw_fence->refcount) == 0) { 113 kfree(submit->hw_fence); 114 } else { 115 dma_fence_put(submit->hw_fence); 116 } 117 118 put_pid(submit->pid); 119 msm_submitqueue_put(submit->queue); 120 121 for (i = 0; i < submit->nr_cmds; i++) 122 kfree(submit->cmd[i].relocs); 123 124 kfree(submit); 125 } 126 127 static int submit_lookup_objects(struct msm_gem_submit *submit, 128 struct drm_msm_gem_submit *args, struct drm_file *file) 129 { 130 unsigned i; 131 int ret = 0; 132 133 for (i = 0; i < args->nr_bos; i++) { 134 struct drm_msm_gem_submit_bo submit_bo; 135 void __user *userptr = 136 u64_to_user_ptr(args->bos + (i * sizeof(submit_bo))); 137 138 /* make sure we don't have garbage flags, in case we hit 139 * error path before flags is initialized: 140 */ 141 submit->bos[i].flags = 0; 142 143 if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) { 144 ret = -EFAULT; 145 i = 0; 146 goto out; 147 } 148 149 /* at least one of READ and/or WRITE flags should be set: */ 150 #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE) 151 152 if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) || 153 !(submit_bo.flags & MANDATORY_FLAGS)) { 154 ret = SUBMIT_ERROR(EINVAL, submit, "invalid flags: %x\n", submit_bo.flags); 155 i = 0; 156 goto out; 157 } 158 159 submit->bos[i].handle = submit_bo.handle; 160 submit->bos[i].flags = submit_bo.flags; 161 } 162 163 spin_lock(&file->table_lock); 164 165 for (i = 0; i < args->nr_bos; i++) { 166 struct drm_gem_object *obj; 167 168 /* normally use drm_gem_object_lookup(), but for bulk lookup 169 * all under single table_lock just hit object_idr directly: 170 */ 171 obj = idr_find(&file->object_idr, submit->bos[i].handle); 172 if (!obj) { 173 ret = SUBMIT_ERROR(EINVAL, submit, "invalid handle %u at index %u\n", submit->bos[i].handle, i); 174 goto out_unlock; 175 } 176 177 drm_gem_object_get(obj); 178 179 submit->bos[i].obj = obj; 180 } 181 182 out_unlock: 183 spin_unlock(&file->table_lock); 184 185 out: 186 submit->nr_bos = i; 187 188 return ret; 189 } 190 191 static int submit_lookup_cmds(struct msm_gem_submit *submit, 192 struct drm_msm_gem_submit *args, struct drm_file *file) 193 { 194 unsigned i; 195 size_t sz; 196 int ret = 0; 197 198 for (i = 0; i < args->nr_cmds; i++) { 199 struct drm_msm_gem_submit_cmd submit_cmd; 200 void __user *userptr = 201 u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd))); 202 203 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd)); 204 if (ret) { 205 ret = -EFAULT; 206 goto out; 207 } 208 209 /* validate input from userspace: */ 210 switch (submit_cmd.type) { 211 case MSM_SUBMIT_CMD_BUF: 212 case MSM_SUBMIT_CMD_IB_TARGET_BUF: 213 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF: 214 break; 215 default: 216 return SUBMIT_ERROR(EINVAL, submit, "invalid type: %08x\n", submit_cmd.type); 217 } 218 219 if (submit_cmd.size % 4) { 220 ret = SUBMIT_ERROR(EINVAL, submit, "non-aligned cmdstream buffer size: %u\n", 221 submit_cmd.size); 222 goto out; 223 } 224 225 submit->cmd[i].type = submit_cmd.type; 226 submit->cmd[i].size = submit_cmd.size / 4; 227 submit->cmd[i].offset = submit_cmd.submit_offset / 4; 228 submit->cmd[i].idx = submit_cmd.submit_idx; 229 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs; 230 231 userptr = u64_to_user_ptr(submit_cmd.relocs); 232 233 sz = array_size(submit_cmd.nr_relocs, 234 sizeof(struct drm_msm_gem_submit_reloc)); 235 /* check for overflow: */ 236 if (sz == SIZE_MAX) { 237 ret = -ENOMEM; 238 goto out; 239 } 240 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN); 241 if (!submit->cmd[i].relocs) { 242 ret = -ENOMEM; 243 goto out; 244 } 245 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz); 246 if (ret) { 247 ret = -EFAULT; 248 goto out; 249 } 250 } 251 252 out: 253 return ret; 254 } 255 256 /* This is where we make sure all the bo's are reserved and pin'd: */ 257 static int submit_lock_objects(struct msm_gem_submit *submit) 258 { 259 int ret; 260 261 drm_exec_init(&submit->exec, DRM_EXEC_INTERRUPTIBLE_WAIT, submit->nr_bos); 262 263 drm_exec_until_all_locked (&submit->exec) { 264 for (unsigned i = 0; i < submit->nr_bos; i++) { 265 struct drm_gem_object *obj = submit->bos[i].obj; 266 ret = drm_exec_prepare_obj(&submit->exec, obj, 1); 267 drm_exec_retry_on_contention(&submit->exec); 268 if (ret) 269 goto error; 270 } 271 } 272 273 return 0; 274 275 error: 276 return ret; 277 } 278 279 static int submit_fence_sync(struct msm_gem_submit *submit) 280 { 281 int i, ret = 0; 282 283 for (i = 0; i < submit->nr_bos; i++) { 284 struct drm_gem_object *obj = submit->bos[i].obj; 285 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE; 286 287 /* Otherwise userspace can ask for implicit sync to be 288 * disabled on specific buffers. This is useful for internal 289 * usermode driver managed buffers, suballocation, etc. 290 */ 291 if (submit->bos[i].flags & MSM_SUBMIT_BO_NO_IMPLICIT) 292 continue; 293 294 ret = drm_sched_job_add_implicit_dependencies(&submit->base, 295 obj, 296 write); 297 if (ret) 298 break; 299 } 300 301 return ret; 302 } 303 304 static int submit_pin_objects(struct msm_gem_submit *submit) 305 { 306 struct msm_drm_private *priv = submit->dev->dev_private; 307 int i, ret = 0; 308 309 for (i = 0; i < submit->nr_bos; i++) { 310 struct drm_gem_object *obj = submit->bos[i].obj; 311 struct msm_gem_vma *vma; 312 313 /* if locking succeeded, pin bo: */ 314 vma = msm_gem_get_vma_locked(obj, submit->aspace); 315 if (IS_ERR(vma)) { 316 ret = PTR_ERR(vma); 317 break; 318 } 319 320 ret = msm_gem_pin_vma_locked(obj, vma); 321 if (ret) 322 break; 323 324 submit->bos[i].iova = vma->iova; 325 } 326 327 /* 328 * A second loop while holding the LRU lock (a) avoids acquiring/dropping 329 * the LRU lock for each individual bo, while (b) avoiding holding the 330 * LRU lock while calling msm_gem_pin_vma_locked() (which could trigger 331 * get_pages() which could trigger reclaim.. and if we held the LRU lock 332 * could trigger deadlock with the shrinker). 333 */ 334 mutex_lock(&priv->lru.lock); 335 for (i = 0; i < submit->nr_bos; i++) { 336 msm_gem_pin_obj_locked(submit->bos[i].obj); 337 } 338 mutex_unlock(&priv->lru.lock); 339 340 submit->bos_pinned = true; 341 342 return ret; 343 } 344 345 static void submit_unpin_objects(struct msm_gem_submit *submit) 346 { 347 if (!submit->bos_pinned) 348 return; 349 350 for (int i = 0; i < submit->nr_bos; i++) { 351 struct drm_gem_object *obj = submit->bos[i].obj; 352 353 msm_gem_unpin_locked(obj); 354 } 355 356 submit->bos_pinned = false; 357 } 358 359 static void submit_attach_object_fences(struct msm_gem_submit *submit) 360 { 361 int i; 362 363 for (i = 0; i < submit->nr_bos; i++) { 364 struct drm_gem_object *obj = submit->bos[i].obj; 365 366 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE) 367 dma_resv_add_fence(obj->resv, submit->user_fence, 368 DMA_RESV_USAGE_WRITE); 369 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ) 370 dma_resv_add_fence(obj->resv, submit->user_fence, 371 DMA_RESV_USAGE_READ); 372 } 373 } 374 375 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx, 376 struct drm_gem_object **obj, uint64_t *iova) 377 { 378 if (idx >= submit->nr_bos) { 379 return SUBMIT_ERROR(EINVAL, submit, "invalid buffer index: %u (out of %u)\n", 380 idx, submit->nr_bos); 381 } 382 383 if (obj) 384 *obj = submit->bos[idx].obj; 385 if (iova) 386 *iova = submit->bos[idx].iova; 387 388 return 0; 389 } 390 391 /* process the reloc's and patch up the cmdstream as needed: */ 392 static int submit_reloc(struct msm_gem_submit *submit, struct drm_gem_object *obj, 393 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs) 394 { 395 uint32_t i, last_offset = 0; 396 uint32_t *ptr; 397 int ret = 0; 398 399 if (offset % 4) 400 return SUBMIT_ERROR(EINVAL, submit, "non-aligned cmdstream buffer: %u\n", offset); 401 402 /* For now, just map the entire thing. Eventually we probably 403 * to do it page-by-page, w/ kmap() if not vmap()d.. 404 */ 405 ptr = msm_gem_get_vaddr_locked(obj); 406 407 if (IS_ERR(ptr)) { 408 ret = PTR_ERR(ptr); 409 DBG("failed to map: %d", ret); 410 return ret; 411 } 412 413 for (i = 0; i < nr_relocs; i++) { 414 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i]; 415 uint32_t off; 416 uint64_t iova; 417 418 if (submit_reloc.submit_offset % 4) { 419 ret = SUBMIT_ERROR(EINVAL, submit, "non-aligned reloc offset: %u\n", 420 submit_reloc.submit_offset); 421 goto out; 422 } 423 424 /* offset in dwords: */ 425 off = submit_reloc.submit_offset / 4; 426 427 if ((off >= (obj->size / 4)) || 428 (off < last_offset)) { 429 ret = SUBMIT_ERROR(EINVAL, submit, "invalid offset %u at reloc %u\n", off, i); 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 = SUBMIT_ERROR(EOPNOTSUPP, submit, "syncobj timeline unsupported"); 517 break; 518 } 519 520 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) { 521 ret = SUBMIT_ERROR(EINVAL, submit, "invalid syncobj flags: %x", syncobj_desc.flags); 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 = SUBMIT_ERROR(EINVAL, submit, "invalid syncobj handle: %u", i); 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 = UERR(EINVAL, dev, "invalid syncobj flags"); 592 break; 593 } 594 595 if (syncobj_desc.point) { 596 if (!drm_core_check_feature(dev, 597 DRIVER_SYNCOBJ_TIMELINE)) { 598 ret = UERR(EOPNOTSUPP, dev, "syncobj timeline unsupported"); 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 = UERR(EINVAL, dev, "invalid syncobj handle"); 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 struct sync_file *sync_file = NULL; 662 int out_fence_fd = -1; 663 unsigned i; 664 int ret; 665 666 if (!gpu) 667 return -ENXIO; 668 669 if (args->pad) 670 return -EINVAL; 671 672 if (unlikely(!ctx->aspace) && !capable(CAP_SYS_RAWIO)) { 673 DRM_ERROR_RATELIMITED("IOMMU support or CAP_SYS_RAWIO required!\n"); 674 return -EPERM; 675 } 676 677 /* for now, we just have 3d pipe.. eventually this would need to 678 * be more clever to dispatch to appropriate gpu module: 679 */ 680 if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0) 681 return UERR(EINVAL, dev, "invalid pipe"); 682 683 if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS) 684 return UERR(EINVAL, dev, "invalid flags"); 685 686 if (args->flags & MSM_SUBMIT_SUDO) { 687 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) || 688 !capable(CAP_SYS_RAWIO)) 689 return -EINVAL; 690 } 691 692 queue = msm_submitqueue_get(ctx, args->queueid); 693 if (!queue) 694 return -ENOENT; 695 696 ring = gpu->rb[queue->ring_nr]; 697 698 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) { 699 out_fence_fd = get_unused_fd_flags(O_CLOEXEC); 700 if (out_fence_fd < 0) { 701 ret = out_fence_fd; 702 goto out_post_unlock; 703 } 704 } 705 706 submit = submit_create(dev, gpu, queue, args->nr_bos, args->nr_cmds); 707 if (IS_ERR(submit)) { 708 ret = PTR_ERR(submit); 709 goto out_post_unlock; 710 } 711 712 trace_msm_gpu_submit(pid_nr(submit->pid), ring->id, submit->ident, 713 args->nr_bos, args->nr_cmds); 714 715 ret = mutex_lock_interruptible(&queue->lock); 716 if (ret) 717 goto out_post_unlock; 718 719 if (args->flags & MSM_SUBMIT_SUDO) 720 submit->in_rb = true; 721 722 if (args->flags & MSM_SUBMIT_FENCE_FD_IN) { 723 struct dma_fence *in_fence; 724 725 in_fence = sync_file_get_fence(args->fence_fd); 726 727 if (!in_fence) { 728 ret = UERR(EINVAL, dev, "invalid in-fence"); 729 goto out_unlock; 730 } 731 732 ret = drm_sched_job_add_dependency(&submit->base, in_fence); 733 if (ret) 734 goto out_unlock; 735 } 736 737 if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) { 738 syncobjs_to_reset = msm_parse_deps(submit, file, 739 args->in_syncobjs, 740 args->nr_in_syncobjs, 741 args->syncobj_stride); 742 if (IS_ERR(syncobjs_to_reset)) { 743 ret = PTR_ERR(syncobjs_to_reset); 744 goto out_unlock; 745 } 746 } 747 748 if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) { 749 post_deps = msm_parse_post_deps(dev, file, 750 args->out_syncobjs, 751 args->nr_out_syncobjs, 752 args->syncobj_stride); 753 if (IS_ERR(post_deps)) { 754 ret = PTR_ERR(post_deps); 755 goto out_unlock; 756 } 757 } 758 759 ret = submit_lookup_objects(submit, args, file); 760 if (ret) 761 goto out; 762 763 ret = submit_lookup_cmds(submit, args, file); 764 if (ret) 765 goto out; 766 767 /* copy_*_user while holding a ww ticket upsets lockdep */ 768 ret = submit_lock_objects(submit); 769 if (ret) 770 goto out; 771 772 if (!(args->flags & MSM_SUBMIT_NO_IMPLICIT)) { 773 ret = submit_fence_sync(submit); 774 if (ret) 775 goto out; 776 } 777 778 ret = submit_pin_objects(submit); 779 if (ret) 780 goto out; 781 782 for (i = 0; i < args->nr_cmds; i++) { 783 struct drm_gem_object *obj; 784 uint64_t iova; 785 786 ret = submit_bo(submit, submit->cmd[i].idx, &obj, &iova); 787 if (ret) 788 goto out; 789 790 if (!submit->cmd[i].size || 791 (size_add(submit->cmd[i].size, submit->cmd[i].offset) > obj->size / 4)) { 792 ret = UERR(EINVAL, dev, "invalid cmdstream size: %u\n", 793 submit->cmd[i].size * 4); 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 ret = UERR(EINVAL, dev, "relocs not allowed\n"); 804 goto out; 805 } 806 807 ret = submit_reloc(submit, obj, submit->cmd[i].offset * 4, 808 submit->cmd[i].nr_relocs, submit->cmd[i].relocs); 809 if (ret) 810 goto out; 811 } 812 813 submit->nr_cmds = i; 814 815 idr_preload(GFP_KERNEL); 816 817 spin_lock(&queue->idr_lock); 818 819 /* 820 * If using userspace provided seqno fence, validate that the id 821 * is available before arming sched job. Since access to fence_idr 822 * is serialized on the queue lock, the slot should be still avail 823 * after the job is armed 824 */ 825 if ((args->flags & MSM_SUBMIT_FENCE_SN_IN) && 826 (!args->fence || idr_find(&queue->fence_idr, args->fence))) { 827 spin_unlock(&queue->idr_lock); 828 idr_preload_end(); 829 ret = UERR(EINVAL, dev, "invalid in-fence-sn"); 830 goto out; 831 } 832 833 drm_sched_job_arm(&submit->base); 834 835 submit->user_fence = dma_fence_get(&submit->base.s_fence->finished); 836 837 if (args->flags & MSM_SUBMIT_FENCE_SN_IN) { 838 /* 839 * Userspace has assigned the seqno fence that it wants 840 * us to use. It is an error to pick a fence sequence 841 * number that is not available. 842 */ 843 submit->fence_id = args->fence; 844 ret = idr_alloc_u32(&queue->fence_idr, submit->user_fence, 845 &submit->fence_id, submit->fence_id, 846 GFP_NOWAIT); 847 /* 848 * We've already validated that the fence_id slot is valid, 849 * so if idr_alloc_u32 failed, it is a kernel bug 850 */ 851 WARN_ON(ret); 852 } else { 853 /* 854 * Allocate an id which can be used by WAIT_FENCE ioctl to map 855 * back to the underlying fence. 856 */ 857 submit->fence_id = idr_alloc_cyclic(&queue->fence_idr, 858 submit->user_fence, 1, 859 INT_MAX, GFP_NOWAIT); 860 } 861 862 spin_unlock(&queue->idr_lock); 863 idr_preload_end(); 864 865 if (submit->fence_id < 0) { 866 ret = submit->fence_id; 867 submit->fence_id = 0; 868 } 869 870 if (ret == 0 && args->flags & MSM_SUBMIT_FENCE_FD_OUT) { 871 sync_file = sync_file_create(submit->user_fence); 872 if (!sync_file) { 873 ret = -ENOMEM; 874 } else { 875 fd_install(out_fence_fd, sync_file->file); 876 args->fence_fd = out_fence_fd; 877 } 878 } 879 880 if (ret) 881 goto out; 882 883 submit_attach_object_fences(submit); 884 885 /* The scheduler owns a ref now: */ 886 msm_gem_submit_get(submit); 887 888 msm_rd_dump_submit(priv->rd, submit, NULL); 889 890 drm_sched_entity_push_job(&submit->base); 891 892 args->fence = submit->fence_id; 893 queue->last_fence = submit->fence_id; 894 895 msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs); 896 msm_process_post_deps(post_deps, args->nr_out_syncobjs, 897 submit->user_fence); 898 899 900 out: 901 submit_cleanup(submit, !!ret); 902 out_unlock: 903 mutex_unlock(&queue->lock); 904 out_post_unlock: 905 if (ret && (out_fence_fd >= 0)) { 906 put_unused_fd(out_fence_fd); 907 if (sync_file) 908 fput(sync_file->file); 909 } 910 911 if (!IS_ERR_OR_NULL(submit)) { 912 msm_gem_submit_put(submit); 913 } else { 914 /* 915 * If the submit hasn't yet taken ownership of the queue 916 * then we need to drop the reference ourself: 917 */ 918 msm_submitqueue_put(queue); 919 } 920 if (!IS_ERR_OR_NULL(post_deps)) { 921 for (i = 0; i < args->nr_out_syncobjs; ++i) { 922 kfree(post_deps[i].chain); 923 drm_syncobj_put(post_deps[i].syncobj); 924 } 925 kfree(post_deps); 926 } 927 928 if (!IS_ERR_OR_NULL(syncobjs_to_reset)) { 929 for (i = 0; i < args->nr_in_syncobjs; ++i) { 930 if (syncobjs_to_reset[i]) 931 drm_syncobj_put(syncobjs_to_reset[i]); 932 } 933 kfree(syncobjs_to_reset); 934 } 935 936 return ret; 937 } 938