| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2013 Red Hat |
| * Author: Rob Clark <robdclark@gmail.com> |
| */ |
| |
| #include <linux/file.h> |
| #include <linux/sync_file.h> |
| #include <linux/uaccess.h> |
| |
| #include <drm/drm_drv.h> |
| #include <drm/drm_file.h> |
| #include <drm/drm_syncobj.h> |
| |
| #include "msm_drv.h" |
| #include "msm_gpu.h" |
| #include "msm_gem.h" |
| #include "msm_gpu_trace.h" |
| |
| /* |
| * Cmdstream submission: |
| */ |
| |
| /* make sure these don't conflict w/ MSM_SUBMIT_BO_x */ |
| #define BO_VALID 0x8000 /* is current addr in cmdstream correct/valid? */ |
| #define BO_LOCKED 0x4000 /* obj lock is held */ |
| #define BO_ACTIVE 0x2000 /* active refcnt is held */ |
| #define BO_PINNED 0x1000 /* obj is pinned and on active list */ |
| |
| static struct msm_gem_submit *submit_create(struct drm_device *dev, |
| struct msm_gpu *gpu, |
| struct msm_gpu_submitqueue *queue, uint32_t nr_bos, |
| uint32_t nr_cmds) |
| { |
| struct msm_gem_submit *submit; |
| uint64_t sz; |
| int ret; |
| |
| sz = struct_size(submit, bos, nr_bos) + |
| ((u64)nr_cmds * sizeof(submit->cmd[0])); |
| |
| if (sz > SIZE_MAX) |
| return ERR_PTR(-ENOMEM); |
| |
| submit = kzalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY); |
| if (!submit) |
| return ERR_PTR(-ENOMEM); |
| |
| ret = drm_sched_job_init(&submit->base, queue->entity, queue); |
| if (ret) { |
| kfree(submit); |
| return ERR_PTR(ret); |
| } |
| |
| xa_init_flags(&submit->deps, XA_FLAGS_ALLOC); |
| |
| kref_init(&submit->ref); |
| submit->dev = dev; |
| submit->aspace = queue->ctx->aspace; |
| submit->gpu = gpu; |
| submit->cmd = (void *)&submit->bos[nr_bos]; |
| submit->queue = queue; |
| submit->ring = gpu->rb[queue->ring_nr]; |
| submit->fault_dumped = false; |
| |
| INIT_LIST_HEAD(&submit->node); |
| |
| return submit; |
| } |
| |
| void __msm_gem_submit_destroy(struct kref *kref) |
| { |
| struct msm_gem_submit *submit = |
| container_of(kref, struct msm_gem_submit, ref); |
| unsigned long index; |
| struct dma_fence *fence; |
| unsigned i; |
| |
| if (submit->fence_id) { |
| mutex_lock(&submit->queue->lock); |
| idr_remove(&submit->queue->fence_idr, submit->fence_id); |
| mutex_unlock(&submit->queue->lock); |
| } |
| |
| xa_for_each (&submit->deps, index, fence) { |
| dma_fence_put(fence); |
| } |
| |
| xa_destroy(&submit->deps); |
| |
| dma_fence_put(submit->user_fence); |
| dma_fence_put(submit->hw_fence); |
| |
| put_pid(submit->pid); |
| msm_submitqueue_put(submit->queue); |
| |
| for (i = 0; i < submit->nr_cmds; i++) |
| kfree(submit->cmd[i].relocs); |
| |
| kfree(submit); |
| } |
| |
| static int submit_lookup_objects(struct msm_gem_submit *submit, |
| struct drm_msm_gem_submit *args, struct drm_file *file) |
| { |
| unsigned i; |
| int ret = 0; |
| |
| for (i = 0; i < args->nr_bos; i++) { |
| struct drm_msm_gem_submit_bo submit_bo; |
| void __user *userptr = |
| u64_to_user_ptr(args->bos + (i * sizeof(submit_bo))); |
| |
| /* make sure we don't have garbage flags, in case we hit |
| * error path before flags is initialized: |
| */ |
| submit->bos[i].flags = 0; |
| |
| if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) { |
| ret = -EFAULT; |
| i = 0; |
| goto out; |
| } |
| |
| /* at least one of READ and/or WRITE flags should be set: */ |
| #define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE) |
| |
| if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) || |
| !(submit_bo.flags & MANDATORY_FLAGS)) { |
| DRM_ERROR("invalid flags: %x\n", submit_bo.flags); |
| ret = -EINVAL; |
| i = 0; |
| goto out; |
| } |
| |
| submit->bos[i].handle = submit_bo.handle; |
| submit->bos[i].flags = submit_bo.flags; |
| /* in validate_objects() we figure out if this is true: */ |
| submit->bos[i].iova = submit_bo.presumed; |
| } |
| |
| spin_lock(&file->table_lock); |
| |
| for (i = 0; i < args->nr_bos; i++) { |
| struct drm_gem_object *obj; |
| |
| /* normally use drm_gem_object_lookup(), but for bulk lookup |
| * all under single table_lock just hit object_idr directly: |
| */ |
| obj = idr_find(&file->object_idr, submit->bos[i].handle); |
| if (!obj) { |
| DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i); |
| ret = -EINVAL; |
| goto out_unlock; |
| } |
| |
| drm_gem_object_get(obj); |
| |
| submit->bos[i].obj = to_msm_bo(obj); |
| } |
| |
| out_unlock: |
| spin_unlock(&file->table_lock); |
| |
| out: |
| submit->nr_bos = i; |
| |
| return ret; |
| } |
| |
| static int submit_lookup_cmds(struct msm_gem_submit *submit, |
| struct drm_msm_gem_submit *args, struct drm_file *file) |
| { |
| unsigned i; |
| size_t sz; |
| int ret = 0; |
| |
| for (i = 0; i < args->nr_cmds; i++) { |
| struct drm_msm_gem_submit_cmd submit_cmd; |
| void __user *userptr = |
| u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd))); |
| |
| ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd)); |
| if (ret) { |
| ret = -EFAULT; |
| goto out; |
| } |
| |
| /* validate input from userspace: */ |
| switch (submit_cmd.type) { |
| case MSM_SUBMIT_CMD_BUF: |
| case MSM_SUBMIT_CMD_IB_TARGET_BUF: |
| case MSM_SUBMIT_CMD_CTX_RESTORE_BUF: |
| break; |
| default: |
| DRM_ERROR("invalid type: %08x\n", submit_cmd.type); |
| return -EINVAL; |
| } |
| |
| if (submit_cmd.size % 4) { |
| DRM_ERROR("non-aligned cmdstream buffer size: %u\n", |
| submit_cmd.size); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| submit->cmd[i].type = submit_cmd.type; |
| submit->cmd[i].size = submit_cmd.size / 4; |
| submit->cmd[i].offset = submit_cmd.submit_offset / 4; |
| submit->cmd[i].idx = submit_cmd.submit_idx; |
| submit->cmd[i].nr_relocs = submit_cmd.nr_relocs; |
| |
| userptr = u64_to_user_ptr(submit_cmd.relocs); |
| |
| sz = array_size(submit_cmd.nr_relocs, |
| sizeof(struct drm_msm_gem_submit_reloc)); |
| /* check for overflow: */ |
| if (sz == SIZE_MAX) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL); |
| ret = copy_from_user(submit->cmd[i].relocs, userptr, sz); |
| if (ret) { |
| ret = -EFAULT; |
| goto out; |
| } |
| } |
| |
| out: |
| return ret; |
| } |
| |
| /* Unwind bo state, according to cleanup_flags. In the success case, only |
| * the lock is dropped at the end of the submit (and active/pin ref is dropped |
| * later when the submit is retired). |
| */ |
| static void submit_cleanup_bo(struct msm_gem_submit *submit, int i, |
| unsigned cleanup_flags) |
| { |
| struct drm_gem_object *obj = &submit->bos[i].obj->base; |
| unsigned flags = submit->bos[i].flags & cleanup_flags; |
| |
| if (flags & BO_PINNED) |
| msm_gem_unpin_iova_locked(obj, submit->aspace); |
| |
| if (flags & BO_ACTIVE) |
| msm_gem_active_put(obj); |
| |
| if (flags & BO_LOCKED) |
| dma_resv_unlock(obj->resv); |
| |
| submit->bos[i].flags &= ~cleanup_flags; |
| } |
| |
| static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i) |
| { |
| submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE | BO_LOCKED); |
| |
| if (!(submit->bos[i].flags & BO_VALID)) |
| submit->bos[i].iova = 0; |
| } |
| |
| /* This is where we make sure all the bo's are reserved and pin'd: */ |
| static int submit_lock_objects(struct msm_gem_submit *submit) |
| { |
| int contended, slow_locked = -1, i, ret = 0; |
| |
| retry: |
| for (i = 0; i < submit->nr_bos; i++) { |
| struct msm_gem_object *msm_obj = submit->bos[i].obj; |
| |
| if (slow_locked == i) |
| slow_locked = -1; |
| |
| contended = i; |
| |
| if (!(submit->bos[i].flags & BO_LOCKED)) { |
| ret = dma_resv_lock_interruptible(msm_obj->base.resv, |
| &submit->ticket); |
| if (ret) |
| goto fail; |
| submit->bos[i].flags |= BO_LOCKED; |
| } |
| } |
| |
| ww_acquire_done(&submit->ticket); |
| |
| return 0; |
| |
| fail: |
| if (ret == -EALREADY) { |
| DRM_ERROR("handle %u at index %u already on submit list\n", |
| submit->bos[i].handle, i); |
| ret = -EINVAL; |
| } |
| |
| for (; i >= 0; i--) |
| submit_unlock_unpin_bo(submit, i); |
| |
| if (slow_locked > 0) |
| submit_unlock_unpin_bo(submit, slow_locked); |
| |
| if (ret == -EDEADLK) { |
| struct msm_gem_object *msm_obj = submit->bos[contended].obj; |
| /* we lost out in a seqno race, lock and retry.. */ |
| ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv, |
| &submit->ticket); |
| if (!ret) { |
| submit->bos[contended].flags |= BO_LOCKED; |
| slow_locked = contended; |
| goto retry; |
| } |
| |
| /* Not expecting -EALREADY here, if the bo was already |
| * locked, we should have gotten -EALREADY already from |
| * the dma_resv_lock_interruptable() call. |
| */ |
| WARN_ON_ONCE(ret == -EALREADY); |
| } |
| |
| return ret; |
| } |
| |
| static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit) |
| { |
| int i, ret = 0; |
| |
| for (i = 0; i < submit->nr_bos; i++) { |
| struct drm_gem_object *obj = &submit->bos[i].obj->base; |
| bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE; |
| |
| if (!write) { |
| /* NOTE: _reserve_shared() must happen before |
| * _add_shared_fence(), which makes this a slightly |
| * strange place to call it. OTOH this is a |
| * convenient can-fail point to hook it in. |
| */ |
| ret = dma_resv_reserve_shared(obj->resv, 1); |
| if (ret) |
| return ret; |
| } |
| |
| if (no_implicit) |
| continue; |
| |
| ret = drm_gem_fence_array_add_implicit(&submit->deps, obj, |
| write); |
| if (ret) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int submit_pin_objects(struct msm_gem_submit *submit) |
| { |
| int i, ret = 0; |
| |
| submit->valid = true; |
| |
| /* |
| * Increment active_count first, so if under memory pressure, we |
| * don't inadvertently evict a bo needed by the submit in order |
| * to pin an earlier bo in the same submit. |
| */ |
| for (i = 0; i < submit->nr_bos; i++) { |
| struct drm_gem_object *obj = &submit->bos[i].obj->base; |
| |
| msm_gem_active_get(obj, submit->gpu); |
| submit->bos[i].flags |= BO_ACTIVE; |
| } |
| |
| for (i = 0; i < submit->nr_bos; i++) { |
| struct drm_gem_object *obj = &submit->bos[i].obj->base; |
| uint64_t iova; |
| |
| /* if locking succeeded, pin bo: */ |
| ret = msm_gem_get_and_pin_iova_locked(obj, |
| submit->aspace, &iova); |
| |
| if (ret) |
| break; |
| |
| submit->bos[i].flags |= BO_PINNED; |
| |
| if (iova == submit->bos[i].iova) { |
| submit->bos[i].flags |= BO_VALID; |
| } else { |
| submit->bos[i].iova = iova; |
| /* iova changed, so address in cmdstream is not valid: */ |
| submit->bos[i].flags &= ~BO_VALID; |
| submit->valid = false; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static void submit_attach_object_fences(struct msm_gem_submit *submit) |
| { |
| int i; |
| |
| for (i = 0; i < submit->nr_bos; i++) { |
| struct drm_gem_object *obj = &submit->bos[i].obj->base; |
| |
| if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE) |
| dma_resv_add_excl_fence(obj->resv, submit->user_fence); |
| else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ) |
| dma_resv_add_shared_fence(obj->resv, submit->user_fence); |
| } |
| } |
| |
| static int submit_bo(struct msm_gem_submit *submit, uint32_t idx, |
| struct msm_gem_object **obj, uint64_t *iova, bool *valid) |
| { |
| if (idx >= submit->nr_bos) { |
| DRM_ERROR("invalid buffer index: %u (out of %u)\n", |
| idx, submit->nr_bos); |
| return -EINVAL; |
| } |
| |
| if (obj) |
| *obj = submit->bos[idx].obj; |
| if (iova) |
| *iova = submit->bos[idx].iova; |
| if (valid) |
| *valid = !!(submit->bos[idx].flags & BO_VALID); |
| |
| return 0; |
| } |
| |
| /* process the reloc's and patch up the cmdstream as needed: */ |
| static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj, |
| uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs) |
| { |
| uint32_t i, last_offset = 0; |
| uint32_t *ptr; |
| int ret = 0; |
| |
| if (!nr_relocs) |
| return 0; |
| |
| if (offset % 4) { |
| DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset); |
| return -EINVAL; |
| } |
| |
| /* For now, just map the entire thing. Eventually we probably |
| * to do it page-by-page, w/ kmap() if not vmap()d.. |
| */ |
| ptr = msm_gem_get_vaddr_locked(&obj->base); |
| |
| if (IS_ERR(ptr)) { |
| ret = PTR_ERR(ptr); |
| DBG("failed to map: %d", ret); |
| return ret; |
| } |
| |
| for (i = 0; i < nr_relocs; i++) { |
| struct drm_msm_gem_submit_reloc submit_reloc = relocs[i]; |
| uint32_t off; |
| uint64_t iova; |
| bool valid; |
| |
| if (submit_reloc.submit_offset % 4) { |
| DRM_ERROR("non-aligned reloc offset: %u\n", |
| submit_reloc.submit_offset); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| /* offset in dwords: */ |
| off = submit_reloc.submit_offset / 4; |
| |
| if ((off >= (obj->base.size / 4)) || |
| (off < last_offset)) { |
| DRM_ERROR("invalid offset %u at reloc %u\n", off, i); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid); |
| if (ret) |
| goto out; |
| |
| if (valid) |
| continue; |
| |
| iova += submit_reloc.reloc_offset; |
| |
| if (submit_reloc.shift < 0) |
| iova >>= -submit_reloc.shift; |
| else |
| iova <<= submit_reloc.shift; |
| |
| ptr[off] = iova | submit_reloc.or; |
| |
| last_offset = off; |
| } |
| |
| out: |
| msm_gem_put_vaddr_locked(&obj->base); |
| |
| return ret; |
| } |
| |
| /* Cleanup submit at end of ioctl. In the error case, this also drops |
| * references, unpins, and drops active refcnt. In the non-error case, |
| * this is done when the submit is retired. |
| */ |
| static void submit_cleanup(struct msm_gem_submit *submit, bool error) |
| { |
| unsigned cleanup_flags = BO_LOCKED; |
| unsigned i; |
| |
| if (error) |
| cleanup_flags |= BO_PINNED | BO_ACTIVE; |
| |
| for (i = 0; i < submit->nr_bos; i++) { |
| struct msm_gem_object *msm_obj = submit->bos[i].obj; |
| submit_cleanup_bo(submit, i, cleanup_flags); |
| if (error) |
| drm_gem_object_put(&msm_obj->base); |
| } |
| } |
| |
| void msm_submit_retire(struct msm_gem_submit *submit) |
| { |
| int i; |
| |
| for (i = 0; i < submit->nr_bos; i++) { |
| struct drm_gem_object *obj = &submit->bos[i].obj->base; |
| |
| msm_gem_lock(obj); |
| submit_cleanup_bo(submit, i, BO_PINNED | BO_ACTIVE); |
| msm_gem_unlock(obj); |
| drm_gem_object_put(obj); |
| } |
| } |
| |
| struct msm_submit_post_dep { |
| struct drm_syncobj *syncobj; |
| uint64_t point; |
| struct dma_fence_chain *chain; |
| }; |
| |
| static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit, |
| struct drm_file *file, |
| uint64_t in_syncobjs_addr, |
| uint32_t nr_in_syncobjs, |
| size_t syncobj_stride, |
| struct msm_ringbuffer *ring) |
| { |
| struct drm_syncobj **syncobjs = NULL; |
| struct drm_msm_gem_submit_syncobj syncobj_desc = {0}; |
| int ret = 0; |
| uint32_t i, j; |
| |
| syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs), |
| GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY); |
| if (!syncobjs) |
| return ERR_PTR(-ENOMEM); |
| |
| for (i = 0; i < nr_in_syncobjs; ++i) { |
| uint64_t address = in_syncobjs_addr + i * syncobj_stride; |
| struct dma_fence *fence; |
| |
| if (copy_from_user(&syncobj_desc, |
| u64_to_user_ptr(address), |
| min(syncobj_stride, sizeof(syncobj_desc)))) { |
| ret = -EFAULT; |
| break; |
| } |
| |
| if (syncobj_desc.point && |
| !drm_core_check_feature(submit->dev, DRIVER_SYNCOBJ_TIMELINE)) { |
| ret = -EOPNOTSUPP; |
| break; |
| } |
| |
| if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) { |
| ret = -EINVAL; |
| break; |
| } |
| |
| ret = drm_syncobj_find_fence(file, syncobj_desc.handle, |
| syncobj_desc.point, 0, &fence); |
| if (ret) |
| break; |
| |
| ret = drm_gem_fence_array_add(&submit->deps, fence); |
| if (ret) |
| break; |
| |
| if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) { |
| syncobjs[i] = |
| drm_syncobj_find(file, syncobj_desc.handle); |
| if (!syncobjs[i]) { |
| ret = -EINVAL; |
| break; |
| } |
| } |
| } |
| |
| if (ret) { |
| for (j = 0; j <= i; ++j) { |
| if (syncobjs[j]) |
| drm_syncobj_put(syncobjs[j]); |
| } |
| kfree(syncobjs); |
| return ERR_PTR(ret); |
| } |
| return syncobjs; |
| } |
| |
| static void msm_reset_syncobjs(struct drm_syncobj **syncobjs, |
| uint32_t nr_syncobjs) |
| { |
| uint32_t i; |
| |
| for (i = 0; syncobjs && i < nr_syncobjs; ++i) { |
| if (syncobjs[i]) |
| drm_syncobj_replace_fence(syncobjs[i], NULL); |
| } |
| } |
| |
| static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev, |
| struct drm_file *file, |
| uint64_t syncobjs_addr, |
| uint32_t nr_syncobjs, |
| size_t syncobj_stride) |
| { |
| struct msm_submit_post_dep *post_deps; |
| struct drm_msm_gem_submit_syncobj syncobj_desc = {0}; |
| int ret = 0; |
| uint32_t i, j; |
| |
| post_deps = kmalloc_array(nr_syncobjs, sizeof(*post_deps), |
| GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY); |
| if (!post_deps) |
| return ERR_PTR(-ENOMEM); |
| |
| for (i = 0; i < nr_syncobjs; ++i) { |
| uint64_t address = syncobjs_addr + i * syncobj_stride; |
| |
| if (copy_from_user(&syncobj_desc, |
| u64_to_user_ptr(address), |
| min(syncobj_stride, sizeof(syncobj_desc)))) { |
| ret = -EFAULT; |
| break; |
| } |
| |
| post_deps[i].point = syncobj_desc.point; |
| post_deps[i].chain = NULL; |
| |
| if (syncobj_desc.flags) { |
| ret = -EINVAL; |
| break; |
| } |
| |
| if (syncobj_desc.point) { |
| if (!drm_core_check_feature(dev, |
| DRIVER_SYNCOBJ_TIMELINE)) { |
| ret = -EOPNOTSUPP; |
| break; |
| } |
| |
| post_deps[i].chain = dma_fence_chain_alloc(); |
| if (!post_deps[i].chain) { |
| ret = -ENOMEM; |
| break; |
| } |
| } |
| |
| post_deps[i].syncobj = |
| drm_syncobj_find(file, syncobj_desc.handle); |
| if (!post_deps[i].syncobj) { |
| ret = -EINVAL; |
| break; |
| } |
| } |
| |
| if (ret) { |
| for (j = 0; j <= i; ++j) { |
| dma_fence_chain_free(post_deps[j].chain); |
| if (post_deps[j].syncobj) |
| drm_syncobj_put(post_deps[j].syncobj); |
| } |
| |
| kfree(post_deps); |
| return ERR_PTR(ret); |
| } |
| |
| return post_deps; |
| } |
| |
| static void msm_process_post_deps(struct msm_submit_post_dep *post_deps, |
| uint32_t count, struct dma_fence *fence) |
| { |
| uint32_t i; |
| |
| for (i = 0; post_deps && i < count; ++i) { |
| if (post_deps[i].chain) { |
| drm_syncobj_add_point(post_deps[i].syncobj, |
| post_deps[i].chain, |
| fence, post_deps[i].point); |
| post_deps[i].chain = NULL; |
| } else { |
| drm_syncobj_replace_fence(post_deps[i].syncobj, |
| fence); |
| } |
| } |
| } |
| |
| int msm_ioctl_gem_submit(struct drm_device *dev, void *data, |
| struct drm_file *file) |
| { |
| static atomic_t ident = ATOMIC_INIT(0); |
| struct msm_drm_private *priv = dev->dev_private; |
| struct drm_msm_gem_submit *args = data; |
| struct msm_file_private *ctx = file->driver_priv; |
| struct msm_gem_submit *submit = NULL; |
| struct msm_gpu *gpu = priv->gpu; |
| struct msm_gpu_submitqueue *queue; |
| struct msm_ringbuffer *ring; |
| struct msm_submit_post_dep *post_deps = NULL; |
| struct drm_syncobj **syncobjs_to_reset = NULL; |
| int out_fence_fd = -1; |
| struct pid *pid = get_pid(task_pid(current)); |
| bool has_ww_ticket = false; |
| unsigned i; |
| int ret, submitid; |
| |
| if (!gpu) |
| return -ENXIO; |
| |
| if (args->pad) |
| return -EINVAL; |
| |
| /* for now, we just have 3d pipe.. eventually this would need to |
| * be more clever to dispatch to appropriate gpu module: |
| */ |
| if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0) |
| return -EINVAL; |
| |
| if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS) |
| return -EINVAL; |
| |
| if (args->flags & MSM_SUBMIT_SUDO) { |
| if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) || |
| !capable(CAP_SYS_RAWIO)) |
| return -EINVAL; |
| } |
| |
| queue = msm_submitqueue_get(ctx, args->queueid); |
| if (!queue) |
| return -ENOENT; |
| |
| /* Get a unique identifier for the submission for logging purposes */ |
| submitid = atomic_inc_return(&ident) - 1; |
| |
| ring = gpu->rb[queue->ring_nr]; |
| trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid, |
| args->nr_bos, args->nr_cmds); |
| |
| ret = mutex_lock_interruptible(&queue->lock); |
| if (ret) |
| goto out_post_unlock; |
| |
| if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) { |
| out_fence_fd = get_unused_fd_flags(O_CLOEXEC); |
| if (out_fence_fd < 0) { |
| ret = out_fence_fd; |
| goto out_unlock; |
| } |
| } |
| |
| submit = submit_create(dev, gpu, queue, args->nr_bos, |
| args->nr_cmds); |
| if (IS_ERR(submit)) { |
| ret = PTR_ERR(submit); |
| goto out_unlock; |
| } |
| |
| submit->pid = pid; |
| submit->ident = submitid; |
| |
| if (args->flags & MSM_SUBMIT_SUDO) |
| submit->in_rb = true; |
| |
| if (args->flags & MSM_SUBMIT_FENCE_FD_IN) { |
| struct dma_fence *in_fence; |
| |
| in_fence = sync_file_get_fence(args->fence_fd); |
| |
| if (!in_fence) { |
| ret = -EINVAL; |
| goto out_unlock; |
| } |
| |
| ret = drm_gem_fence_array_add(&submit->deps, in_fence); |
| if (ret) |
| goto out_unlock; |
| } |
| |
| if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) { |
| syncobjs_to_reset = msm_parse_deps(submit, file, |
| args->in_syncobjs, |
| args->nr_in_syncobjs, |
| args->syncobj_stride, ring); |
| if (IS_ERR(syncobjs_to_reset)) { |
| ret = PTR_ERR(syncobjs_to_reset); |
| goto out_unlock; |
| } |
| } |
| |
| if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) { |
| post_deps = msm_parse_post_deps(dev, file, |
| args->out_syncobjs, |
| args->nr_out_syncobjs, |
| args->syncobj_stride); |
| if (IS_ERR(post_deps)) { |
| ret = PTR_ERR(post_deps); |
| goto out_unlock; |
| } |
| } |
| |
| ret = submit_lookup_objects(submit, args, file); |
| if (ret) |
| goto out; |
| |
| ret = submit_lookup_cmds(submit, args, file); |
| if (ret) |
| goto out; |
| |
| /* copy_*_user while holding a ww ticket upsets lockdep */ |
| ww_acquire_init(&submit->ticket, &reservation_ww_class); |
| has_ww_ticket = true; |
| ret = submit_lock_objects(submit); |
| if (ret) |
| goto out; |
| |
| ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT)); |
| if (ret) |
| goto out; |
| |
| ret = submit_pin_objects(submit); |
| if (ret) |
| goto out; |
| |
| for (i = 0; i < args->nr_cmds; i++) { |
| struct msm_gem_object *msm_obj; |
| uint64_t iova; |
| |
| ret = submit_bo(submit, submit->cmd[i].idx, |
| &msm_obj, &iova, NULL); |
| if (ret) |
| goto out; |
| |
| if (!submit->cmd[i].size || |
| ((submit->cmd[i].size + submit->cmd[i].offset) > |
| msm_obj->base.size / 4)) { |
| DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4); |
| |
| if (submit->valid) |
| continue; |
| |
| ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4, |
| submit->cmd[i].nr_relocs, submit->cmd[i].relocs); |
| if (ret) |
| goto out; |
| } |
| |
| submit->nr_cmds = i; |
| |
| submit->user_fence = dma_fence_get(&submit->base.s_fence->finished); |
| |
| /* |
| * Allocate an id which can be used by WAIT_FENCE ioctl to map back |
| * to the underlying fence. |
| */ |
| submit->fence_id = idr_alloc_cyclic(&queue->fence_idr, |
| submit->user_fence, 0, INT_MAX, GFP_KERNEL); |
| if (submit->fence_id < 0) { |
| ret = submit->fence_id = 0; |
| submit->fence_id = 0; |
| goto out; |
| } |
| |
| if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) { |
| struct sync_file *sync_file = sync_file_create(submit->user_fence); |
| if (!sync_file) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| fd_install(out_fence_fd, sync_file->file); |
| args->fence_fd = out_fence_fd; |
| } |
| |
| submit_attach_object_fences(submit); |
| |
| /* The scheduler owns a ref now: */ |
| msm_gem_submit_get(submit); |
| |
| drm_sched_entity_push_job(&submit->base, queue->entity); |
| |
| args->fence = submit->fence_id; |
| |
| msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs); |
| msm_process_post_deps(post_deps, args->nr_out_syncobjs, |
| submit->user_fence); |
| |
| |
| out: |
| submit_cleanup(submit, !!ret); |
| if (has_ww_ticket) |
| ww_acquire_fini(&submit->ticket); |
| out_unlock: |
| if (ret && (out_fence_fd >= 0)) |
| put_unused_fd(out_fence_fd); |
| mutex_unlock(&queue->lock); |
| if (submit) |
| msm_gem_submit_put(submit); |
| out_post_unlock: |
| if (!IS_ERR_OR_NULL(post_deps)) { |
| for (i = 0; i < args->nr_out_syncobjs; ++i) { |
| kfree(post_deps[i].chain); |
| drm_syncobj_put(post_deps[i].syncobj); |
| } |
| kfree(post_deps); |
| } |
| |
| if (!IS_ERR_OR_NULL(syncobjs_to_reset)) { |
| for (i = 0; i < args->nr_in_syncobjs; ++i) { |
| if (syncobjs_to_reset[i]) |
| drm_syncobj_put(syncobjs_to_reset[i]); |
| } |
| kfree(syncobjs_to_reset); |
| } |
| |
| return ret; |
| } |