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; 175 size_t sz; 176 int ret = 0; 177 178 for (i = 0; i < args->nr_cmds; i++) { 179 struct drm_msm_gem_submit_cmd submit_cmd; 180 void __user *userptr = 181 u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd))); 182 183 ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd)); 184 if (ret) { 185 ret = -EFAULT; 186 goto out; 187 } 188 189 /* validate input from userspace: */ 190 switch (submit_cmd.type) { 191 case MSM_SUBMIT_CMD_BUF: 192 case MSM_SUBMIT_CMD_IB_TARGET_BUF: 193 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF: 194 break; 195 default: 196 DRM_ERROR("invalid type: %08x\n", submit_cmd.type); 197 return -EINVAL; 198 } 199 200 if (submit_cmd.size % 4) { 201 DRM_ERROR("non-aligned cmdstream buffer size: %u\n", 202 submit_cmd.size); 203 ret = -EINVAL; 204 goto out; 205 } 206 207 submit->cmd[i].type = submit_cmd.type; 208 submit->cmd[i].size = submit_cmd.size / 4; 209 submit->cmd[i].offset = submit_cmd.submit_offset / 4; 210 submit->cmd[i].idx = submit_cmd.submit_idx; 211 submit->cmd[i].nr_relocs = submit_cmd.nr_relocs; 212 213 userptr = u64_to_user_ptr(submit_cmd.relocs); 214 215 sz = array_size(submit_cmd.nr_relocs, 216 sizeof(struct drm_msm_gem_submit_reloc)); 217 /* check for overflow: */ 218 if (sz == SIZE_MAX) { 219 ret = -ENOMEM; 220 goto out; 221 } 222 submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL); 223 ret = copy_from_user(submit->cmd[i].relocs, userptr, sz); 224 if (ret) { 225 ret = -EFAULT; 226 goto out; 227 } 228 } 229 230 out: 231 return ret; 232 } 233 234 /* Unwind bo state, according to cleanup_flags. In the success case, only 235 * the lock is dropped at the end of the submit (and active/pin ref is dropped 236 * later when the submit is retired). 237 */ 238 static void submit_cleanup_bo(struct msm_gem_submit *submit, int i, 239 unsigned cleanup_flags) 240 { 241 struct drm_gem_object *obj = &submit->bos[i].obj->base; 242 unsigned flags = submit->bos[i].flags & cleanup_flags; 243 244 if (flags & BO_PINNED) 245 msm_gem_unpin_iova_locked(obj, submit->aspace); 246 247 if (flags & BO_ACTIVE) 248 msm_gem_active_put(obj); 249 250 if (flags & BO_LOCKED) 251 dma_resv_unlock(obj->resv); 252 253 submit->bos[i].flags &= ~cleanup_flags; 254 } 255 256 static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i) 257 { 258 submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE | BO_LOCKED); 259 260 if (!(submit->bos[i].flags & BO_VALID)) 261 submit->bos[i].iova = 0; 262 } 263 264 /* This is where we make sure all the bo's are reserved and pin'd: */ 265 static int submit_lock_objects(struct msm_gem_submit *submit) 266 { 267 int contended, slow_locked = -1, i, ret = 0; 268 269 retry: 270 for (i = 0; i < submit->nr_bos; i++) { 271 struct msm_gem_object *msm_obj = submit->bos[i].obj; 272 273 if (slow_locked == i) 274 slow_locked = -1; 275 276 contended = i; 277 278 if (!(submit->bos[i].flags & BO_LOCKED)) { 279 ret = dma_resv_lock_interruptible(msm_obj->base.resv, 280 &submit->ticket); 281 if (ret) 282 goto fail; 283 submit->bos[i].flags |= BO_LOCKED; 284 } 285 } 286 287 ww_acquire_done(&submit->ticket); 288 289 return 0; 290 291 fail: 292 if (ret == -EALREADY) { 293 DRM_ERROR("handle %u at index %u already on submit list\n", 294 submit->bos[i].handle, i); 295 ret = -EINVAL; 296 } 297 298 for (; i >= 0; i--) 299 submit_unlock_unpin_bo(submit, i); 300 301 if (slow_locked > 0) 302 submit_unlock_unpin_bo(submit, slow_locked); 303 304 if (ret == -EDEADLK) { 305 struct msm_gem_object *msm_obj = submit->bos[contended].obj; 306 /* we lost out in a seqno race, lock and retry.. */ 307 ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv, 308 &submit->ticket); 309 if (!ret) { 310 submit->bos[contended].flags |= BO_LOCKED; 311 slow_locked = contended; 312 goto retry; 313 } 314 315 /* Not expecting -EALREADY here, if the bo was already 316 * locked, we should have gotten -EALREADY already from 317 * the dma_resv_lock_interruptable() call. 318 */ 319 WARN_ON_ONCE(ret == -EALREADY); 320 } 321 322 return ret; 323 } 324 325 static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit) 326 { 327 int i, ret = 0; 328 329 for (i = 0; i < submit->nr_bos; i++) { 330 struct drm_gem_object *obj = &submit->bos[i].obj->base; 331 bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE; 332 333 if (!write) { 334 /* NOTE: _reserve_shared() must happen before 335 * _add_shared_fence(), which makes this a slightly 336 * strange place to call it. OTOH this is a 337 * convenient can-fail point to hook it in. 338 */ 339 ret = dma_resv_reserve_shared(obj->resv, 1); 340 if (ret) 341 return ret; 342 } 343 344 if (no_implicit) 345 continue; 346 347 ret = drm_gem_fence_array_add_implicit(&submit->deps, obj, 348 write); 349 if (ret) 350 break; 351 } 352 353 return ret; 354 } 355 356 static int submit_pin_objects(struct msm_gem_submit *submit) 357 { 358 int i, ret = 0; 359 360 submit->valid = true; 361 362 /* 363 * Increment active_count first, so if under memory pressure, we 364 * don't inadvertently evict a bo needed by the submit in order 365 * to pin an earlier bo in the same submit. 366 */ 367 for (i = 0; i < submit->nr_bos; i++) { 368 struct drm_gem_object *obj = &submit->bos[i].obj->base; 369 370 msm_gem_active_get(obj, submit->gpu); 371 submit->bos[i].flags |= BO_ACTIVE; 372 } 373 374 for (i = 0; i < submit->nr_bos; i++) { 375 struct drm_gem_object *obj = &submit->bos[i].obj->base; 376 uint64_t iova; 377 378 /* if locking succeeded, pin bo: */ 379 ret = msm_gem_get_and_pin_iova_locked(obj, 380 submit->aspace, &iova); 381 382 if (ret) 383 break; 384 385 submit->bos[i].flags |= BO_PINNED; 386 387 if (iova == submit->bos[i].iova) { 388 submit->bos[i].flags |= BO_VALID; 389 } else { 390 submit->bos[i].iova = iova; 391 /* iova changed, so address in cmdstream is not valid: */ 392 submit->bos[i].flags &= ~BO_VALID; 393 submit->valid = false; 394 } 395 } 396 397 return ret; 398 } 399 400 static void submit_attach_object_fences(struct msm_gem_submit *submit) 401 { 402 int i; 403 404 for (i = 0; i < submit->nr_bos; i++) { 405 struct drm_gem_object *obj = &submit->bos[i].obj->base; 406 407 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE) 408 dma_resv_add_excl_fence(obj->resv, submit->user_fence); 409 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ) 410 dma_resv_add_shared_fence(obj->resv, submit->user_fence); 411 } 412 } 413 414 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx, 415 struct msm_gem_object **obj, uint64_t *iova, bool *valid) 416 { 417 if (idx >= submit->nr_bos) { 418 DRM_ERROR("invalid buffer index: %u (out of %u)\n", 419 idx, submit->nr_bos); 420 return -EINVAL; 421 } 422 423 if (obj) 424 *obj = submit->bos[idx].obj; 425 if (iova) 426 *iova = submit->bos[idx].iova; 427 if (valid) 428 *valid = !!(submit->bos[idx].flags & BO_VALID); 429 430 return 0; 431 } 432 433 /* process the reloc's and patch up the cmdstream as needed: */ 434 static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj, 435 uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs) 436 { 437 uint32_t i, last_offset = 0; 438 uint32_t *ptr; 439 int ret = 0; 440 441 if (!nr_relocs) 442 return 0; 443 444 if (offset % 4) { 445 DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset); 446 return -EINVAL; 447 } 448 449 /* For now, just map the entire thing. Eventually we probably 450 * to do it page-by-page, w/ kmap() if not vmap()d.. 451 */ 452 ptr = msm_gem_get_vaddr_locked(&obj->base); 453 454 if (IS_ERR(ptr)) { 455 ret = PTR_ERR(ptr); 456 DBG("failed to map: %d", ret); 457 return ret; 458 } 459 460 for (i = 0; i < nr_relocs; i++) { 461 struct drm_msm_gem_submit_reloc submit_reloc = relocs[i]; 462 uint32_t off; 463 uint64_t iova; 464 bool valid; 465 466 if (submit_reloc.submit_offset % 4) { 467 DRM_ERROR("non-aligned reloc offset: %u\n", 468 submit_reloc.submit_offset); 469 ret = -EINVAL; 470 goto out; 471 } 472 473 /* offset in dwords: */ 474 off = submit_reloc.submit_offset / 4; 475 476 if ((off >= (obj->base.size / 4)) || 477 (off < last_offset)) { 478 DRM_ERROR("invalid offset %u at reloc %u\n", off, i); 479 ret = -EINVAL; 480 goto out; 481 } 482 483 ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid); 484 if (ret) 485 goto out; 486 487 if (valid) 488 continue; 489 490 iova += submit_reloc.reloc_offset; 491 492 if (submit_reloc.shift < 0) 493 iova >>= -submit_reloc.shift; 494 else 495 iova <<= submit_reloc.shift; 496 497 ptr[off] = iova | submit_reloc.or; 498 499 last_offset = off; 500 } 501 502 out: 503 msm_gem_put_vaddr_locked(&obj->base); 504 505 return ret; 506 } 507 508 /* Cleanup submit at end of ioctl. In the error case, this also drops 509 * references, unpins, and drops active refcnt. In the non-error case, 510 * this is done when the submit is retired. 511 */ 512 static void submit_cleanup(struct msm_gem_submit *submit, bool error) 513 { 514 unsigned cleanup_flags = BO_LOCKED; 515 unsigned i; 516 517 if (error) 518 cleanup_flags |= BO_PINNED | BO_ACTIVE; 519 520 for (i = 0; i < submit->nr_bos; i++) { 521 struct msm_gem_object *msm_obj = submit->bos[i].obj; 522 submit_cleanup_bo(submit, i, cleanup_flags); 523 if (error) 524 drm_gem_object_put(&msm_obj->base); 525 } 526 } 527 528 void msm_submit_retire(struct msm_gem_submit *submit) 529 { 530 int i; 531 532 for (i = 0; i < submit->nr_bos; i++) { 533 struct drm_gem_object *obj = &submit->bos[i].obj->base; 534 535 msm_gem_lock(obj); 536 submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE); 537 msm_gem_unlock(obj); 538 drm_gem_object_put(obj); 539 } 540 } 541 542 struct msm_submit_post_dep { 543 struct drm_syncobj *syncobj; 544 uint64_t point; 545 struct dma_fence_chain *chain; 546 }; 547 548 static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit, 549 struct drm_file *file, 550 uint64_t in_syncobjs_addr, 551 uint32_t nr_in_syncobjs, 552 size_t syncobj_stride, 553 struct msm_ringbuffer *ring) 554 { 555 struct drm_syncobj **syncobjs = NULL; 556 struct drm_msm_gem_submit_syncobj syncobj_desc = {0}; 557 int ret = 0; 558 uint32_t i, j; 559 560 syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs), 561 GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY); 562 if (!syncobjs) 563 return ERR_PTR(-ENOMEM); 564 565 for (i = 0; i < nr_in_syncobjs; ++i) { 566 uint64_t address = in_syncobjs_addr + i * syncobj_stride; 567 struct dma_fence *fence; 568 569 if (copy_from_user(&syncobj_desc, 570 u64_to_user_ptr(address), 571 min(syncobj_stride, sizeof(syncobj_desc)))) { 572 ret = -EFAULT; 573 break; 574 } 575 576 if (syncobj_desc.point && 577 !drm_core_check_feature(submit->dev, DRIVER_SYNCOBJ_TIMELINE)) { 578 ret = -EOPNOTSUPP; 579 break; 580 } 581 582 if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) { 583 ret = -EINVAL; 584 break; 585 } 586 587 ret = drm_syncobj_find_fence(file, syncobj_desc.handle, 588 syncobj_desc.point, 0, &fence); 589 if (ret) 590 break; 591 592 ret = drm_gem_fence_array_add(&submit->deps, fence); 593 if (ret) 594 break; 595 596 if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) { 597 syncobjs[i] = 598 drm_syncobj_find(file, syncobj_desc.handle); 599 if (!syncobjs[i]) { 600 ret = -EINVAL; 601 break; 602 } 603 } 604 } 605 606 if (ret) { 607 for (j = 0; j <= i; ++j) { 608 if (syncobjs[j]) 609 drm_syncobj_put(syncobjs[j]); 610 } 611 kfree(syncobjs); 612 return ERR_PTR(ret); 613 } 614 return syncobjs; 615 } 616 617 static void msm_reset_syncobjs(struct drm_syncobj **syncobjs, 618 uint32_t nr_syncobjs) 619 { 620 uint32_t i; 621 622 for (i = 0; syncobjs && i < nr_syncobjs; ++i) { 623 if (syncobjs[i]) 624 drm_syncobj_replace_fence(syncobjs[i], NULL); 625 } 626 } 627 628 static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev, 629 struct drm_file *file, 630 uint64_t syncobjs_addr, 631 uint32_t nr_syncobjs, 632 size_t syncobj_stride) 633 { 634 struct msm_submit_post_dep *post_deps; 635 struct drm_msm_gem_submit_syncobj syncobj_desc = {0}; 636 int ret = 0; 637 uint32_t i, j; 638 639 post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps), 640 GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY); 641 if (!post_deps) 642 return ERR_PTR(-ENOMEM); 643 644 for (i = 0; i < nr_syncobjs; ++i) { 645 uint64_t address = syncobjs_addr + i * syncobj_stride; 646 647 if (copy_from_user(&syncobj_desc, 648 u64_to_user_ptr(address), 649 min(syncobj_stride, sizeof(syncobj_desc)))) { 650 ret = -EFAULT; 651 break; 652 } 653 654 post_deps[i].point = syncobj_desc.point; 655 post_deps[i].chain = NULL; 656 657 if (syncobj_desc.flags) { 658 ret = -EINVAL; 659 break; 660 } 661 662 if (syncobj_desc.point) { 663 if (!drm_core_check_feature(dev, 664 DRIVER_SYNCOBJ_TIMELINE)) { 665 ret = -EOPNOTSUPP; 666 break; 667 } 668 669 post_deps[i].chain = dma_fence_chain_alloc(); 670 if (!post_deps[i].chain) { 671 ret = -ENOMEM; 672 break; 673 } 674 } 675 676 post_deps[i].syncobj = 677 drm_syncobj_find(file, syncobj_desc.handle); 678 if (!post_deps[i].syncobj) { 679 ret = -EINVAL; 680 break; 681 } 682 } 683 684 if (ret) { 685 for (j = 0; j <= i; ++j) { 686 dma_fence_chain_free(post_deps[j].chain); 687 if (post_deps[j].syncobj) 688 drm_syncobj_put(post_deps[j].syncobj); 689 } 690 691 kfree(post_deps); 692 return ERR_PTR(ret); 693 } 694 695 return post_deps; 696 } 697 698 static void msm_process_post_deps(struct msm_submit_post_dep *post_deps, 699 uint32_t count, struct dma_fence *fence) 700 { 701 uint32_t i; 702 703 for (i = 0; post_deps && i < count; ++i) { 704 if (post_deps[i].chain) { 705 drm_syncobj_add_point(post_deps[i].syncobj, 706 post_deps[i].chain, 707 fence, post_deps[i].point); 708 post_deps[i].chain = NULL; 709 } else { 710 drm_syncobj_replace_fence(post_deps[i].syncobj, 711 fence); 712 } 713 } 714 } 715 716 int msm_ioctl_gem_submit(struct drm_device *dev, void *data, 717 struct drm_file *file) 718 { 719 static atomic_t ident = ATOMIC_INIT(0); 720 struct msm_drm_private *priv = dev->dev_private; 721 struct drm_msm_gem_submit *args = data; 722 struct msm_file_private *ctx = file->driver_priv; 723 struct msm_gem_submit *submit = NULL; 724 struct msm_gpu *gpu = priv->gpu; 725 struct msm_gpu_submitqueue *queue; 726 struct msm_ringbuffer *ring; 727 struct msm_submit_post_dep *post_deps = NULL; 728 struct drm_syncobj **syncobjs_to_reset = NULL; 729 int out_fence_fd = -1; 730 struct pid *pid = get_pid(task_pid(current)); 731 bool has_ww_ticket = false; 732 unsigned i; 733 int ret, submitid; 734 735 if (!gpu) 736 return -ENXIO; 737 738 if (args->pad) 739 return -EINVAL; 740 741 /* for now, we just have 3d pipe.. eventually this would need to 742 * be more clever to dispatch to appropriate gpu module: 743 */ 744 if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0) 745 return -EINVAL; 746 747 if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS) 748 return -EINVAL; 749 750 if (args->flags & MSM_SUBMIT_SUDO) { 751 if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) || 752 !capable(CAP_SYS_RAWIO)) 753 return -EINVAL; 754 } 755 756 queue = msm_submitqueue_get(ctx, args->queueid); 757 if (!queue) 758 return -ENOENT; 759 760 /* Get a unique identifier for the submission for logging purposes */ 761 submitid = atomic_inc_return(&ident) - 1; 762 763 ring = gpu->rb[queue->ring_nr]; 764 trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid, 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_FENCE_FD_OUT) { 772 out_fence_fd = get_unused_fd_flags(O_CLOEXEC); 773 if (out_fence_fd < 0) { 774 ret = out_fence_fd; 775 goto out_unlock; 776 } 777 } 778 779 submit = submit_create(dev, gpu, queue, args->nr_bos, 780 args->nr_cmds); 781 if (IS_ERR(submit)) { 782 ret = PTR_ERR(submit); 783 goto out_unlock; 784 } 785 786 submit->pid = pid; 787 submit->ident = submitid; 788 789 if (args->flags & MSM_SUBMIT_SUDO) 790 submit->in_rb = true; 791 792 if (args->flags & MSM_SUBMIT_FENCE_FD_IN) { 793 struct dma_fence *in_fence; 794 795 in_fence = sync_file_get_fence(args->fence_fd); 796 797 if (!in_fence) { 798 ret = -EINVAL; 799 goto out_unlock; 800 } 801 802 ret = drm_gem_fence_array_add(&submit->deps, in_fence); 803 if (ret) 804 goto out_unlock; 805 } 806 807 if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) { 808 syncobjs_to_reset = msm_parse_deps(submit, file, 809 args->in_syncobjs, 810 args->nr_in_syncobjs, 811 args->syncobj_stride, ring); 812 if (IS_ERR(syncobjs_to_reset)) { 813 ret = PTR_ERR(syncobjs_to_reset); 814 goto out_unlock; 815 } 816 } 817 818 if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) { 819 post_deps = msm_parse_post_deps(dev, file, 820 args->out_syncobjs, 821 args->nr_out_syncobjs, 822 args->syncobj_stride); 823 if (IS_ERR(post_deps)) { 824 ret = PTR_ERR(post_deps); 825 goto out_unlock; 826 } 827 } 828 829 ret = submit_lookup_objects(submit, args, file); 830 if (ret) 831 goto out; 832 833 ret = submit_lookup_cmds(submit, args, file); 834 if (ret) 835 goto out; 836 837 /* copy_*_user while holding a ww ticket upsets lockdep */ 838 ww_acquire_init(&submit->ticket, &reservation_ww_class); 839 has_ww_ticket = true; 840 ret = submit_lock_objects(submit); 841 if (ret) 842 goto out; 843 844 ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT)); 845 if (ret) 846 goto out; 847 848 ret = submit_pin_objects(submit); 849 if (ret) 850 goto out; 851 852 for (i = 0; i < args->nr_cmds; i++) { 853 struct msm_gem_object *msm_obj; 854 uint64_t iova; 855 856 ret = submit_bo(submit, submit->cmd[i].idx, 857 &msm_obj, &iova, NULL); 858 if (ret) 859 goto out; 860 861 if (!submit->cmd[i].size || 862 ((submit->cmd[i].size + submit->cmd[i].offset) > 863 msm_obj->base.size / 4)) { 864 DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4); 865 ret = -EINVAL; 866 goto out; 867 } 868 869 submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4); 870 871 if (submit->valid) 872 continue; 873 874 ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4, 875 submit->cmd[i].nr_relocs, submit->cmd[i].relocs); 876 if (ret) 877 goto out; 878 } 879 880 submit->nr_cmds = i; 881 882 submit->user_fence = dma_fence_get(&submit->base.s_fence->finished); 883 884 /* 885 * Allocate an id which can be used by WAIT_FENCE ioctl to map back 886 * to the underlying fence. 887 */ 888 submit->fence_id = idr_alloc_cyclic(&queue->fence_idr, 889 submit->user_fence, 0, INT_MAX, GFP_KERNEL); 890 if (submit->fence_id < 0) { 891 ret = submit->fence_id = 0; 892 submit->fence_id = 0; 893 goto out; 894 } 895 896 if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) { 897 struct sync_file *sync_file = sync_file_create(submit->user_fence); 898 if (!sync_file) { 899 ret = -ENOMEM; 900 goto out; 901 } 902 fd_install(out_fence_fd, sync_file->file); 903 args->fence_fd = out_fence_fd; 904 } 905 906 submit_attach_object_fences(submit); 907 908 /* The scheduler owns a ref now: */ 909 msm_gem_submit_get(submit); 910 911 drm_sched_entity_push_job(&submit->base, queue->entity); 912 913 args->fence = submit->fence_id; 914 915 msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs); 916 msm_process_post_deps(post_deps, args->nr_out_syncobjs, 917 submit->user_fence); 918 919 920 out: 921 submit_cleanup(submit, !!ret); 922 if (has_ww_ticket) 923 ww_acquire_fini(&submit->ticket); 924 out_unlock: 925 if (ret && (out_fence_fd >= 0)) 926 put_unused_fd(out_fence_fd); 927 mutex_unlock(&queue->lock); 928 if (submit) 929 msm_gem_submit_put(submit); 930 out_post_unlock: 931 if (!IS_ERR_OR_NULL(post_deps)) { 932 for (i = 0; i < args->nr_out_syncobjs; ++i) { 933 kfree(post_deps[i].chain); 934 drm_syncobj_put(post_deps[i].syncobj); 935 } 936 kfree(post_deps); 937 } 938 939 if (!IS_ERR_OR_NULL(syncobjs_to_reset)) { 940 for (i = 0; i < args->nr_in_syncobjs; ++i) { 941 if (syncobjs_to_reset[i]) 942 drm_syncobj_put(syncobjs_to_reset[i]); 943 } 944 kfree(syncobjs_to_reset); 945 } 946 947 return ret; 948 } 949