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 } 948