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70eca5d5d3
Userspace can provoke this, we generally don't allow userspace to spam dmesg. Tune it down to debug. Unfortunately we don't have easy access to the drm_device here (not at all without changing a few things), so leave it as old style dmesg output for now. References: https://patchwork.freedesktop.org/series/80146/ Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Cc: "Christian König" <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200801092625.1107609-1-daniel.vetter@ffwll.ch
1472 lines
40 KiB
C
1472 lines
40 KiB
C
/*
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* Copyright 2017 Red Hat
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* Parts ported from amdgpu (fence wait code).
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* Copyright 2016 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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*
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*/
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/**
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* DOC: Overview
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*
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* DRM synchronisation objects (syncobj, see struct &drm_syncobj) provide a
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* container for a synchronization primitive which can be used by userspace
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* to explicitly synchronize GPU commands, can be shared between userspace
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* processes, and can be shared between different DRM drivers.
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* Their primary use-case is to implement Vulkan fences and semaphores.
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* The syncobj userspace API provides ioctls for several operations:
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*
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* - Creation and destruction of syncobjs
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* - Import and export of syncobjs to/from a syncobj file descriptor
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* - Import and export a syncobj's underlying fence to/from a sync file
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* - Reset a syncobj (set its fence to NULL)
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* - Signal a syncobj (set a trivially signaled fence)
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* - Wait for a syncobj's fence to appear and be signaled
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*
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* The syncobj userspace API also provides operations to manipulate a syncobj
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* in terms of a timeline of struct &dma_fence_chain rather than a single
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* struct &dma_fence, through the following operations:
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*
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* - Signal a given point on the timeline
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* - Wait for a given point to appear and/or be signaled
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* - Import and export from/to a given point of a timeline
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*
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* At it's core, a syncobj is simply a wrapper around a pointer to a struct
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* &dma_fence which may be NULL.
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* When a syncobj is first created, its pointer is either NULL or a pointer
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* to an already signaled fence depending on whether the
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* &DRM_SYNCOBJ_CREATE_SIGNALED flag is passed to
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* &DRM_IOCTL_SYNCOBJ_CREATE.
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*
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* If the syncobj is considered as a binary (its state is either signaled or
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* unsignaled) primitive, when GPU work is enqueued in a DRM driver to signal
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* the syncobj, the syncobj's fence is replaced with a fence which will be
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* signaled by the completion of that work.
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* If the syncobj is considered as a timeline primitive, when GPU work is
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* enqueued in a DRM driver to signal the a given point of the syncobj, a new
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* struct &dma_fence_chain pointing to the DRM driver's fence and also
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* pointing to the previous fence that was in the syncobj. The new struct
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* &dma_fence_chain fence replace the syncobj's fence and will be signaled by
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* completion of the DRM driver's work and also any work associated with the
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* fence previously in the syncobj.
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*
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* When GPU work which waits on a syncobj is enqueued in a DRM driver, at the
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* time the work is enqueued, it waits on the syncobj's fence before
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* submitting the work to hardware. That fence is either :
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*
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* - The syncobj's current fence if the syncobj is considered as a binary
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* primitive.
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* - The struct &dma_fence associated with a given point if the syncobj is
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* considered as a timeline primitive.
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*
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* If the syncobj's fence is NULL or not present in the syncobj's timeline,
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* the enqueue operation is expected to fail.
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*
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* With binary syncobj, all manipulation of the syncobjs's fence happens in
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* terms of the current fence at the time the ioctl is called by userspace
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* regardless of whether that operation is an immediate host-side operation
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* (signal or reset) or or an operation which is enqueued in some driver
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* queue. &DRM_IOCTL_SYNCOBJ_RESET and &DRM_IOCTL_SYNCOBJ_SIGNAL can be used
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* to manipulate a syncobj from the host by resetting its pointer to NULL or
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* setting its pointer to a fence which is already signaled.
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*
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* With a timeline syncobj, all manipulation of the synobj's fence happens in
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* terms of a u64 value referring to point in the timeline. See
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* dma_fence_chain_find_seqno() to see how a given point is found in the
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* timeline.
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*
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* Note that applications should be careful to always use timeline set of
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* ioctl() when dealing with syncobj considered as timeline. Using a binary
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* set of ioctl() with a syncobj considered as timeline could result incorrect
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* synchronization. The use of binary syncobj is supported through the
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* timeline set of ioctl() by using a point value of 0, this will reproduce
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* the behavior of the binary set of ioctl() (for example replace the
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* syncobj's fence when signaling).
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*
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*
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* Host-side wait on syncobjs
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* --------------------------
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*
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* &DRM_IOCTL_SYNCOBJ_WAIT takes an array of syncobj handles and does a
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* host-side wait on all of the syncobj fences simultaneously.
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* If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL is set, the wait ioctl will wait on
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* all of the syncobj fences to be signaled before it returns.
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* Otherwise, it returns once at least one syncobj fence has been signaled
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* and the index of a signaled fence is written back to the client.
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*
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* Unlike the enqueued GPU work dependencies which fail if they see a NULL
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* fence in a syncobj, if &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT is set,
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* the host-side wait will first wait for the syncobj to receive a non-NULL
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* fence and then wait on that fence.
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* If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT is not set and any one of the
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* syncobjs in the array has a NULL fence, -EINVAL will be returned.
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* Assuming the syncobj starts off with a NULL fence, this allows a client
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* to do a host wait in one thread (or process) which waits on GPU work
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* submitted in another thread (or process) without having to manually
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* synchronize between the two.
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* This requirement is inherited from the Vulkan fence API.
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*
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* Similarly, &DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT takes an array of syncobj
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* handles as well as an array of u64 points and does a host-side wait on all
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* of syncobj fences at the given points simultaneously.
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*
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* &DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT also adds the ability to wait for a given
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* fence to materialize on the timeline without waiting for the fence to be
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* signaled by using the &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE flag. This
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* requirement is inherited from the wait-before-signal behavior required by
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* the Vulkan timeline semaphore API.
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*
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*
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* Import/export of syncobjs
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* -------------------------
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*
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* &DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE and &DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD
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* provide two mechanisms for import/export of syncobjs.
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*
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* The first lets the client import or export an entire syncobj to a file
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* descriptor.
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* These fd's are opaque and have no other use case, except passing the
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* syncobj between processes.
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* All exported file descriptors and any syncobj handles created as a
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* result of importing those file descriptors own a reference to the
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* same underlying struct &drm_syncobj and the syncobj can be used
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* persistently across all the processes with which it is shared.
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* The syncobj is freed only once the last reference is dropped.
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* Unlike dma-buf, importing a syncobj creates a new handle (with its own
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* reference) for every import instead of de-duplicating.
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* The primary use-case of this persistent import/export is for shared
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* Vulkan fences and semaphores.
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*
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* The second import/export mechanism, which is indicated by
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* &DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE or
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* &DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE lets the client
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* import/export the syncobj's current fence from/to a &sync_file.
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* When a syncobj is exported to a sync file, that sync file wraps the
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* sycnobj's fence at the time of export and any later signal or reset
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* operations on the syncobj will not affect the exported sync file.
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* When a sync file is imported into a syncobj, the syncobj's fence is set
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* to the fence wrapped by that sync file.
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* Because sync files are immutable, resetting or signaling the syncobj
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* will not affect any sync files whose fences have been imported into the
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* syncobj.
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*
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*
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* Import/export of timeline points in timeline syncobjs
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* -----------------------------------------------------
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*
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* &DRM_IOCTL_SYNCOBJ_TRANSFER provides a mechanism to transfer a struct
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* &dma_fence_chain of a syncobj at a given u64 point to another u64 point
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* into another syncobj.
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*
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* Note that if you want to transfer a struct &dma_fence_chain from a given
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* point on a timeline syncobj from/into a binary syncobj, you can use the
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* point 0 to mean take/replace the fence in the syncobj.
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*/
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#include <linux/anon_inodes.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/sched/signal.h>
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#include <linux/sync_file.h>
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#include <linux/uaccess.h>
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#include <drm/drm.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_file.h>
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#include <drm/drm_gem.h>
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#include <drm/drm_print.h>
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#include <drm/drm_syncobj.h>
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#include <drm/drm_utils.h>
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#include "drm_internal.h"
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struct syncobj_wait_entry {
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struct list_head node;
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struct task_struct *task;
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struct dma_fence *fence;
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struct dma_fence_cb fence_cb;
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u64 point;
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};
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static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
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struct syncobj_wait_entry *wait);
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/**
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* drm_syncobj_find - lookup and reference a sync object.
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* @file_private: drm file private pointer
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* @handle: sync object handle to lookup.
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*
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* Returns a reference to the syncobj pointed to by handle or NULL. The
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* reference must be released by calling drm_syncobj_put().
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*/
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struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
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u32 handle)
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{
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struct drm_syncobj *syncobj;
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spin_lock(&file_private->syncobj_table_lock);
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/* Check if we currently have a reference on the object */
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syncobj = idr_find(&file_private->syncobj_idr, handle);
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if (syncobj)
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drm_syncobj_get(syncobj);
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spin_unlock(&file_private->syncobj_table_lock);
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return syncobj;
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}
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EXPORT_SYMBOL(drm_syncobj_find);
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static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj,
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struct syncobj_wait_entry *wait)
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{
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struct dma_fence *fence;
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if (wait->fence)
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return;
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spin_lock(&syncobj->lock);
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/* We've already tried once to get a fence and failed. Now that we
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* have the lock, try one more time just to be sure we don't add a
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* callback when a fence has already been set.
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*/
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fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, 1));
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if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {
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dma_fence_put(fence);
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list_add_tail(&wait->node, &syncobj->cb_list);
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} else if (!fence) {
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wait->fence = dma_fence_get_stub();
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} else {
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wait->fence = fence;
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}
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spin_unlock(&syncobj->lock);
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}
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static void drm_syncobj_remove_wait(struct drm_syncobj *syncobj,
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struct syncobj_wait_entry *wait)
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{
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if (!wait->node.next)
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return;
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spin_lock(&syncobj->lock);
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list_del_init(&wait->node);
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spin_unlock(&syncobj->lock);
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}
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/**
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* drm_syncobj_add_point - add new timeline point to the syncobj
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* @syncobj: sync object to add timeline point do
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* @chain: chain node to use to add the point
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* @fence: fence to encapsulate in the chain node
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* @point: sequence number to use for the point
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*
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* Add the chain node as new timeline point to the syncobj.
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*/
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void drm_syncobj_add_point(struct drm_syncobj *syncobj,
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struct dma_fence_chain *chain,
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struct dma_fence *fence,
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uint64_t point)
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{
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struct syncobj_wait_entry *cur, *tmp;
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struct dma_fence *prev;
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dma_fence_get(fence);
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spin_lock(&syncobj->lock);
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prev = drm_syncobj_fence_get(syncobj);
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/* You are adding an unorder point to timeline, which could cause payload returned from query_ioctl is 0! */
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if (prev && prev->seqno >= point)
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DRM_DEBUG("You are adding an unorder point to timeline!\n");
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dma_fence_chain_init(chain, prev, fence, point);
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rcu_assign_pointer(syncobj->fence, &chain->base);
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list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node)
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syncobj_wait_syncobj_func(syncobj, cur);
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spin_unlock(&syncobj->lock);
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/* Walk the chain once to trigger garbage collection */
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dma_fence_chain_for_each(fence, prev);
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dma_fence_put(prev);
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}
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EXPORT_SYMBOL(drm_syncobj_add_point);
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/**
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* drm_syncobj_replace_fence - replace fence in a sync object.
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* @syncobj: Sync object to replace fence in
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* @fence: fence to install in sync file.
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*
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* This replaces the fence on a sync object.
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*/
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void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
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struct dma_fence *fence)
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{
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struct dma_fence *old_fence;
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struct syncobj_wait_entry *cur, *tmp;
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if (fence)
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dma_fence_get(fence);
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spin_lock(&syncobj->lock);
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old_fence = rcu_dereference_protected(syncobj->fence,
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lockdep_is_held(&syncobj->lock));
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rcu_assign_pointer(syncobj->fence, fence);
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if (fence != old_fence) {
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list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node)
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syncobj_wait_syncobj_func(syncobj, cur);
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}
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spin_unlock(&syncobj->lock);
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dma_fence_put(old_fence);
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}
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EXPORT_SYMBOL(drm_syncobj_replace_fence);
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/**
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* drm_syncobj_assign_null_handle - assign a stub fence to the sync object
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* @syncobj: sync object to assign the fence on
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*
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* Assign a already signaled stub fence to the sync object.
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*/
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static void drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
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{
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struct dma_fence *fence = dma_fence_get_stub();
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drm_syncobj_replace_fence(syncobj, fence);
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dma_fence_put(fence);
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}
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/* 5s default for wait submission */
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#define DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT 5000000000ULL
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/**
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* drm_syncobj_find_fence - lookup and reference the fence in a sync object
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* @file_private: drm file private pointer
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* @handle: sync object handle to lookup.
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* @point: timeline point
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* @flags: DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT or not
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* @fence: out parameter for the fence
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*
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* This is just a convenience function that combines drm_syncobj_find() and
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* drm_syncobj_fence_get().
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*
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* Returns 0 on success or a negative error value on failure. On success @fence
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* contains a reference to the fence, which must be released by calling
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* dma_fence_put().
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*/
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int drm_syncobj_find_fence(struct drm_file *file_private,
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u32 handle, u64 point, u64 flags,
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struct dma_fence **fence)
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{
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struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
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struct syncobj_wait_entry wait;
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u64 timeout = nsecs_to_jiffies64(DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT);
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int ret;
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if (!syncobj)
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return -ENOENT;
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*fence = drm_syncobj_fence_get(syncobj);
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drm_syncobj_put(syncobj);
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if (*fence) {
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ret = dma_fence_chain_find_seqno(fence, point);
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if (!ret)
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return 0;
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dma_fence_put(*fence);
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} else {
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ret = -EINVAL;
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}
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if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT))
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return ret;
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memset(&wait, 0, sizeof(wait));
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wait.task = current;
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wait.point = point;
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drm_syncobj_fence_add_wait(syncobj, &wait);
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do {
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set_current_state(TASK_INTERRUPTIBLE);
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if (wait.fence) {
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ret = 0;
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break;
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}
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if (timeout == 0) {
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ret = -ETIME;
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break;
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}
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if (signal_pending(current)) {
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ret = -ERESTARTSYS;
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break;
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}
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timeout = schedule_timeout(timeout);
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} while (1);
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__set_current_state(TASK_RUNNING);
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*fence = wait.fence;
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if (wait.node.next)
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drm_syncobj_remove_wait(syncobj, &wait);
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return ret;
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}
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EXPORT_SYMBOL(drm_syncobj_find_fence);
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/**
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* drm_syncobj_free - free a sync object.
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* @kref: kref to free.
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*
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* Only to be called from kref_put in drm_syncobj_put.
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*/
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void drm_syncobj_free(struct kref *kref)
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{
|
|
struct drm_syncobj *syncobj = container_of(kref,
|
|
struct drm_syncobj,
|
|
refcount);
|
|
drm_syncobj_replace_fence(syncobj, NULL);
|
|
kfree(syncobj);
|
|
}
|
|
EXPORT_SYMBOL(drm_syncobj_free);
|
|
|
|
/**
|
|
* drm_syncobj_create - create a new syncobj
|
|
* @out_syncobj: returned syncobj
|
|
* @flags: DRM_SYNCOBJ_* flags
|
|
* @fence: if non-NULL, the syncobj will represent this fence
|
|
*
|
|
* This is the first function to create a sync object. After creating, drivers
|
|
* probably want to make it available to userspace, either through
|
|
* drm_syncobj_get_handle() or drm_syncobj_get_fd().
|
|
*
|
|
* Returns 0 on success or a negative error value on failure.
|
|
*/
|
|
int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
|
|
struct dma_fence *fence)
|
|
{
|
|
struct drm_syncobj *syncobj;
|
|
|
|
syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL);
|
|
if (!syncobj)
|
|
return -ENOMEM;
|
|
|
|
kref_init(&syncobj->refcount);
|
|
INIT_LIST_HEAD(&syncobj->cb_list);
|
|
spin_lock_init(&syncobj->lock);
|
|
|
|
if (flags & DRM_SYNCOBJ_CREATE_SIGNALED)
|
|
drm_syncobj_assign_null_handle(syncobj);
|
|
|
|
if (fence)
|
|
drm_syncobj_replace_fence(syncobj, fence);
|
|
|
|
*out_syncobj = syncobj;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_syncobj_create);
|
|
|
|
/**
|
|
* drm_syncobj_get_handle - get a handle from a syncobj
|
|
* @file_private: drm file private pointer
|
|
* @syncobj: Sync object to export
|
|
* @handle: out parameter with the new handle
|
|
*
|
|
* Exports a sync object created with drm_syncobj_create() as a handle on
|
|
* @file_private to userspace.
|
|
*
|
|
* Returns 0 on success or a negative error value on failure.
|
|
*/
|
|
int drm_syncobj_get_handle(struct drm_file *file_private,
|
|
struct drm_syncobj *syncobj, u32 *handle)
|
|
{
|
|
int ret;
|
|
|
|
/* take a reference to put in the idr */
|
|
drm_syncobj_get(syncobj);
|
|
|
|
idr_preload(GFP_KERNEL);
|
|
spin_lock(&file_private->syncobj_table_lock);
|
|
ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT);
|
|
spin_unlock(&file_private->syncobj_table_lock);
|
|
|
|
idr_preload_end();
|
|
|
|
if (ret < 0) {
|
|
drm_syncobj_put(syncobj);
|
|
return ret;
|
|
}
|
|
|
|
*handle = ret;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_syncobj_get_handle);
|
|
|
|
static int drm_syncobj_create_as_handle(struct drm_file *file_private,
|
|
u32 *handle, uint32_t flags)
|
|
{
|
|
int ret;
|
|
struct drm_syncobj *syncobj;
|
|
|
|
ret = drm_syncobj_create(&syncobj, flags, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = drm_syncobj_get_handle(file_private, syncobj, handle);
|
|
drm_syncobj_put(syncobj);
|
|
return ret;
|
|
}
|
|
|
|
static int drm_syncobj_destroy(struct drm_file *file_private,
|
|
u32 handle)
|
|
{
|
|
struct drm_syncobj *syncobj;
|
|
|
|
spin_lock(&file_private->syncobj_table_lock);
|
|
syncobj = idr_remove(&file_private->syncobj_idr, handle);
|
|
spin_unlock(&file_private->syncobj_table_lock);
|
|
|
|
if (!syncobj)
|
|
return -EINVAL;
|
|
|
|
drm_syncobj_put(syncobj);
|
|
return 0;
|
|
}
|
|
|
|
static int drm_syncobj_file_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct drm_syncobj *syncobj = file->private_data;
|
|
|
|
drm_syncobj_put(syncobj);
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations drm_syncobj_file_fops = {
|
|
.release = drm_syncobj_file_release,
|
|
};
|
|
|
|
/**
|
|
* drm_syncobj_get_fd - get a file descriptor from a syncobj
|
|
* @syncobj: Sync object to export
|
|
* @p_fd: out parameter with the new file descriptor
|
|
*
|
|
* Exports a sync object created with drm_syncobj_create() as a file descriptor.
|
|
*
|
|
* Returns 0 on success or a negative error value on failure.
|
|
*/
|
|
int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd)
|
|
{
|
|
struct file *file;
|
|
int fd;
|
|
|
|
fd = get_unused_fd_flags(O_CLOEXEC);
|
|
if (fd < 0)
|
|
return fd;
|
|
|
|
file = anon_inode_getfile("syncobj_file",
|
|
&drm_syncobj_file_fops,
|
|
syncobj, 0);
|
|
if (IS_ERR(file)) {
|
|
put_unused_fd(fd);
|
|
return PTR_ERR(file);
|
|
}
|
|
|
|
drm_syncobj_get(syncobj);
|
|
fd_install(fd, file);
|
|
|
|
*p_fd = fd;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_syncobj_get_fd);
|
|
|
|
static int drm_syncobj_handle_to_fd(struct drm_file *file_private,
|
|
u32 handle, int *p_fd)
|
|
{
|
|
struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
|
|
int ret;
|
|
|
|
if (!syncobj)
|
|
return -EINVAL;
|
|
|
|
ret = drm_syncobj_get_fd(syncobj, p_fd);
|
|
drm_syncobj_put(syncobj);
|
|
return ret;
|
|
}
|
|
|
|
static int drm_syncobj_fd_to_handle(struct drm_file *file_private,
|
|
int fd, u32 *handle)
|
|
{
|
|
struct drm_syncobj *syncobj;
|
|
struct fd f = fdget(fd);
|
|
int ret;
|
|
|
|
if (!f.file)
|
|
return -EINVAL;
|
|
|
|
if (f.file->f_op != &drm_syncobj_file_fops) {
|
|
fdput(f);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* take a reference to put in the idr */
|
|
syncobj = f.file->private_data;
|
|
drm_syncobj_get(syncobj);
|
|
|
|
idr_preload(GFP_KERNEL);
|
|
spin_lock(&file_private->syncobj_table_lock);
|
|
ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT);
|
|
spin_unlock(&file_private->syncobj_table_lock);
|
|
idr_preload_end();
|
|
|
|
if (ret > 0) {
|
|
*handle = ret;
|
|
ret = 0;
|
|
} else
|
|
drm_syncobj_put(syncobj);
|
|
|
|
fdput(f);
|
|
return ret;
|
|
}
|
|
|
|
static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private,
|
|
int fd, int handle)
|
|
{
|
|
struct dma_fence *fence = sync_file_get_fence(fd);
|
|
struct drm_syncobj *syncobj;
|
|
|
|
if (!fence)
|
|
return -EINVAL;
|
|
|
|
syncobj = drm_syncobj_find(file_private, handle);
|
|
if (!syncobj) {
|
|
dma_fence_put(fence);
|
|
return -ENOENT;
|
|
}
|
|
|
|
drm_syncobj_replace_fence(syncobj, fence);
|
|
dma_fence_put(fence);
|
|
drm_syncobj_put(syncobj);
|
|
return 0;
|
|
}
|
|
|
|
static int drm_syncobj_export_sync_file(struct drm_file *file_private,
|
|
int handle, int *p_fd)
|
|
{
|
|
int ret;
|
|
struct dma_fence *fence;
|
|
struct sync_file *sync_file;
|
|
int fd = get_unused_fd_flags(O_CLOEXEC);
|
|
|
|
if (fd < 0)
|
|
return fd;
|
|
|
|
ret = drm_syncobj_find_fence(file_private, handle, 0, 0, &fence);
|
|
if (ret)
|
|
goto err_put_fd;
|
|
|
|
sync_file = sync_file_create(fence);
|
|
|
|
dma_fence_put(fence);
|
|
|
|
if (!sync_file) {
|
|
ret = -EINVAL;
|
|
goto err_put_fd;
|
|
}
|
|
|
|
fd_install(fd, sync_file->file);
|
|
|
|
*p_fd = fd;
|
|
return 0;
|
|
err_put_fd:
|
|
put_unused_fd(fd);
|
|
return ret;
|
|
}
|
|
/**
|
|
* drm_syncobj_open - initalizes syncobj file-private structures at devnode open time
|
|
* @file_private: drm file-private structure to set up
|
|
*
|
|
* Called at device open time, sets up the structure for handling refcounting
|
|
* of sync objects.
|
|
*/
|
|
void
|
|
drm_syncobj_open(struct drm_file *file_private)
|
|
{
|
|
idr_init_base(&file_private->syncobj_idr, 1);
|
|
spin_lock_init(&file_private->syncobj_table_lock);
|
|
}
|
|
|
|
static int
|
|
drm_syncobj_release_handle(int id, void *ptr, void *data)
|
|
{
|
|
struct drm_syncobj *syncobj = ptr;
|
|
|
|
drm_syncobj_put(syncobj);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* drm_syncobj_release - release file-private sync object resources
|
|
* @file_private: drm file-private structure to clean up
|
|
*
|
|
* Called at close time when the filp is going away.
|
|
*
|
|
* Releases any remaining references on objects by this filp.
|
|
*/
|
|
void
|
|
drm_syncobj_release(struct drm_file *file_private)
|
|
{
|
|
idr_for_each(&file_private->syncobj_idr,
|
|
&drm_syncobj_release_handle, file_private);
|
|
idr_destroy(&file_private->syncobj_idr);
|
|
}
|
|
|
|
int
|
|
drm_syncobj_create_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_create *args = data;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
return -EOPNOTSUPP;
|
|
|
|
/* no valid flags yet */
|
|
if (args->flags & ~DRM_SYNCOBJ_CREATE_SIGNALED)
|
|
return -EINVAL;
|
|
|
|
return drm_syncobj_create_as_handle(file_private,
|
|
&args->handle, args->flags);
|
|
}
|
|
|
|
int
|
|
drm_syncobj_destroy_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_destroy *args = data;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
return -EOPNOTSUPP;
|
|
|
|
/* make sure padding is empty */
|
|
if (args->pad)
|
|
return -EINVAL;
|
|
return drm_syncobj_destroy(file_private, args->handle);
|
|
}
|
|
|
|
int
|
|
drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_handle *args = data;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->pad)
|
|
return -EINVAL;
|
|
|
|
if (args->flags != 0 &&
|
|
args->flags != DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE)
|
|
return -EINVAL;
|
|
|
|
if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE)
|
|
return drm_syncobj_export_sync_file(file_private, args->handle,
|
|
&args->fd);
|
|
|
|
return drm_syncobj_handle_to_fd(file_private, args->handle,
|
|
&args->fd);
|
|
}
|
|
|
|
int
|
|
drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_handle *args = data;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->pad)
|
|
return -EINVAL;
|
|
|
|
if (args->flags != 0 &&
|
|
args->flags != DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE)
|
|
return -EINVAL;
|
|
|
|
if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE)
|
|
return drm_syncobj_import_sync_file_fence(file_private,
|
|
args->fd,
|
|
args->handle);
|
|
|
|
return drm_syncobj_fd_to_handle(file_private, args->fd,
|
|
&args->handle);
|
|
}
|
|
|
|
static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,
|
|
struct drm_syncobj_transfer *args)
|
|
{
|
|
struct drm_syncobj *timeline_syncobj = NULL;
|
|
struct dma_fence *fence;
|
|
struct dma_fence_chain *chain;
|
|
int ret;
|
|
|
|
timeline_syncobj = drm_syncobj_find(file_private, args->dst_handle);
|
|
if (!timeline_syncobj) {
|
|
return -ENOENT;
|
|
}
|
|
ret = drm_syncobj_find_fence(file_private, args->src_handle,
|
|
args->src_point, args->flags,
|
|
&fence);
|
|
if (ret)
|
|
goto err;
|
|
chain = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);
|
|
if (!chain) {
|
|
ret = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
drm_syncobj_add_point(timeline_syncobj, chain, fence, args->dst_point);
|
|
err1:
|
|
dma_fence_put(fence);
|
|
err:
|
|
drm_syncobj_put(timeline_syncobj);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
drm_syncobj_transfer_to_binary(struct drm_file *file_private,
|
|
struct drm_syncobj_transfer *args)
|
|
{
|
|
struct drm_syncobj *binary_syncobj = NULL;
|
|
struct dma_fence *fence;
|
|
int ret;
|
|
|
|
binary_syncobj = drm_syncobj_find(file_private, args->dst_handle);
|
|
if (!binary_syncobj)
|
|
return -ENOENT;
|
|
ret = drm_syncobj_find_fence(file_private, args->src_handle,
|
|
args->src_point, args->flags, &fence);
|
|
if (ret)
|
|
goto err;
|
|
drm_syncobj_replace_fence(binary_syncobj, fence);
|
|
dma_fence_put(fence);
|
|
err:
|
|
drm_syncobj_put(binary_syncobj);
|
|
|
|
return ret;
|
|
}
|
|
int
|
|
drm_syncobj_transfer_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_transfer *args = data;
|
|
int ret;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->pad)
|
|
return -EINVAL;
|
|
|
|
if (args->dst_point)
|
|
ret = drm_syncobj_transfer_to_timeline(file_private, args);
|
|
else
|
|
ret = drm_syncobj_transfer_to_binary(file_private, args);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void syncobj_wait_fence_func(struct dma_fence *fence,
|
|
struct dma_fence_cb *cb)
|
|
{
|
|
struct syncobj_wait_entry *wait =
|
|
container_of(cb, struct syncobj_wait_entry, fence_cb);
|
|
|
|
wake_up_process(wait->task);
|
|
}
|
|
|
|
static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
|
|
struct syncobj_wait_entry *wait)
|
|
{
|
|
struct dma_fence *fence;
|
|
|
|
/* This happens inside the syncobj lock */
|
|
fence = rcu_dereference_protected(syncobj->fence,
|
|
lockdep_is_held(&syncobj->lock));
|
|
dma_fence_get(fence);
|
|
if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {
|
|
dma_fence_put(fence);
|
|
return;
|
|
} else if (!fence) {
|
|
wait->fence = dma_fence_get_stub();
|
|
} else {
|
|
wait->fence = fence;
|
|
}
|
|
|
|
wake_up_process(wait->task);
|
|
list_del_init(&wait->node);
|
|
}
|
|
|
|
static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
|
|
void __user *user_points,
|
|
uint32_t count,
|
|
uint32_t flags,
|
|
signed long timeout,
|
|
uint32_t *idx)
|
|
{
|
|
struct syncobj_wait_entry *entries;
|
|
struct dma_fence *fence;
|
|
uint64_t *points;
|
|
uint32_t signaled_count, i;
|
|
|
|
points = kmalloc_array(count, sizeof(*points), GFP_KERNEL);
|
|
if (points == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (!user_points) {
|
|
memset(points, 0, count * sizeof(uint64_t));
|
|
|
|
} else if (copy_from_user(points, user_points,
|
|
sizeof(uint64_t) * count)) {
|
|
timeout = -EFAULT;
|
|
goto err_free_points;
|
|
}
|
|
|
|
entries = kcalloc(count, sizeof(*entries), GFP_KERNEL);
|
|
if (!entries) {
|
|
timeout = -ENOMEM;
|
|
goto err_free_points;
|
|
}
|
|
/* Walk the list of sync objects and initialize entries. We do
|
|
* this up-front so that we can properly return -EINVAL if there is
|
|
* a syncobj with a missing fence and then never have the chance of
|
|
* returning -EINVAL again.
|
|
*/
|
|
signaled_count = 0;
|
|
for (i = 0; i < count; ++i) {
|
|
struct dma_fence *fence;
|
|
|
|
entries[i].task = current;
|
|
entries[i].point = points[i];
|
|
fence = drm_syncobj_fence_get(syncobjs[i]);
|
|
if (!fence || dma_fence_chain_find_seqno(&fence, points[i])) {
|
|
dma_fence_put(fence);
|
|
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
|
|
continue;
|
|
} else {
|
|
timeout = -EINVAL;
|
|
goto cleanup_entries;
|
|
}
|
|
}
|
|
|
|
if (fence)
|
|
entries[i].fence = fence;
|
|
else
|
|
entries[i].fence = dma_fence_get_stub();
|
|
|
|
if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) ||
|
|
dma_fence_is_signaled(entries[i].fence)) {
|
|
if (signaled_count == 0 && idx)
|
|
*idx = i;
|
|
signaled_count++;
|
|
}
|
|
}
|
|
|
|
if (signaled_count == count ||
|
|
(signaled_count > 0 &&
|
|
!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL)))
|
|
goto cleanup_entries;
|
|
|
|
/* There's a very annoying laxness in the dma_fence API here, in
|
|
* that backends are not required to automatically report when a
|
|
* fence is signaled prior to fence->ops->enable_signaling() being
|
|
* called. So here if we fail to match signaled_count, we need to
|
|
* fallthough and try a 0 timeout wait!
|
|
*/
|
|
|
|
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
|
|
for (i = 0; i < count; ++i)
|
|
drm_syncobj_fence_add_wait(syncobjs[i], &entries[i]);
|
|
}
|
|
|
|
do {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
signaled_count = 0;
|
|
for (i = 0; i < count; ++i) {
|
|
fence = entries[i].fence;
|
|
if (!fence)
|
|
continue;
|
|
|
|
if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) ||
|
|
dma_fence_is_signaled(fence) ||
|
|
(!entries[i].fence_cb.func &&
|
|
dma_fence_add_callback(fence,
|
|
&entries[i].fence_cb,
|
|
syncobj_wait_fence_func))) {
|
|
/* The fence has been signaled */
|
|
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL) {
|
|
signaled_count++;
|
|
} else {
|
|
if (idx)
|
|
*idx = i;
|
|
goto done_waiting;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (signaled_count == count)
|
|
goto done_waiting;
|
|
|
|
if (timeout == 0) {
|
|
timeout = -ETIME;
|
|
goto done_waiting;
|
|
}
|
|
|
|
if (signal_pending(current)) {
|
|
timeout = -ERESTARTSYS;
|
|
goto done_waiting;
|
|
}
|
|
|
|
timeout = schedule_timeout(timeout);
|
|
} while (1);
|
|
|
|
done_waiting:
|
|
__set_current_state(TASK_RUNNING);
|
|
|
|
cleanup_entries:
|
|
for (i = 0; i < count; ++i) {
|
|
drm_syncobj_remove_wait(syncobjs[i], &entries[i]);
|
|
if (entries[i].fence_cb.func)
|
|
dma_fence_remove_callback(entries[i].fence,
|
|
&entries[i].fence_cb);
|
|
dma_fence_put(entries[i].fence);
|
|
}
|
|
kfree(entries);
|
|
|
|
err_free_points:
|
|
kfree(points);
|
|
|
|
return timeout;
|
|
}
|
|
|
|
/**
|
|
* drm_timeout_abs_to_jiffies - calculate jiffies timeout from absolute value
|
|
*
|
|
* @timeout_nsec: timeout nsec component in ns, 0 for poll
|
|
*
|
|
* Calculate the timeout in jiffies from an absolute time in sec/nsec.
|
|
*/
|
|
signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec)
|
|
{
|
|
ktime_t abs_timeout, now;
|
|
u64 timeout_ns, timeout_jiffies64;
|
|
|
|
/* make 0 timeout means poll - absolute 0 doesn't seem valid */
|
|
if (timeout_nsec == 0)
|
|
return 0;
|
|
|
|
abs_timeout = ns_to_ktime(timeout_nsec);
|
|
now = ktime_get();
|
|
|
|
if (!ktime_after(abs_timeout, now))
|
|
return 0;
|
|
|
|
timeout_ns = ktime_to_ns(ktime_sub(abs_timeout, now));
|
|
|
|
timeout_jiffies64 = nsecs_to_jiffies64(timeout_ns);
|
|
/* clamp timeout to avoid infinite timeout */
|
|
if (timeout_jiffies64 >= MAX_SCHEDULE_TIMEOUT - 1)
|
|
return MAX_SCHEDULE_TIMEOUT - 1;
|
|
|
|
return timeout_jiffies64 + 1;
|
|
}
|
|
EXPORT_SYMBOL(drm_timeout_abs_to_jiffies);
|
|
|
|
static int drm_syncobj_array_wait(struct drm_device *dev,
|
|
struct drm_file *file_private,
|
|
struct drm_syncobj_wait *wait,
|
|
struct drm_syncobj_timeline_wait *timeline_wait,
|
|
struct drm_syncobj **syncobjs, bool timeline)
|
|
{
|
|
signed long timeout = 0;
|
|
uint32_t first = ~0;
|
|
|
|
if (!timeline) {
|
|
timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);
|
|
timeout = drm_syncobj_array_wait_timeout(syncobjs,
|
|
NULL,
|
|
wait->count_handles,
|
|
wait->flags,
|
|
timeout, &first);
|
|
if (timeout < 0)
|
|
return timeout;
|
|
wait->first_signaled = first;
|
|
} else {
|
|
timeout = drm_timeout_abs_to_jiffies(timeline_wait->timeout_nsec);
|
|
timeout = drm_syncobj_array_wait_timeout(syncobjs,
|
|
u64_to_user_ptr(timeline_wait->points),
|
|
timeline_wait->count_handles,
|
|
timeline_wait->flags,
|
|
timeout, &first);
|
|
if (timeout < 0)
|
|
return timeout;
|
|
timeline_wait->first_signaled = first;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int drm_syncobj_array_find(struct drm_file *file_private,
|
|
void __user *user_handles,
|
|
uint32_t count_handles,
|
|
struct drm_syncobj ***syncobjs_out)
|
|
{
|
|
uint32_t i, *handles;
|
|
struct drm_syncobj **syncobjs;
|
|
int ret;
|
|
|
|
handles = kmalloc_array(count_handles, sizeof(*handles), GFP_KERNEL);
|
|
if (handles == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(handles, user_handles,
|
|
sizeof(uint32_t) * count_handles)) {
|
|
ret = -EFAULT;
|
|
goto err_free_handles;
|
|
}
|
|
|
|
syncobjs = kmalloc_array(count_handles, sizeof(*syncobjs), GFP_KERNEL);
|
|
if (syncobjs == NULL) {
|
|
ret = -ENOMEM;
|
|
goto err_free_handles;
|
|
}
|
|
|
|
for (i = 0; i < count_handles; i++) {
|
|
syncobjs[i] = drm_syncobj_find(file_private, handles[i]);
|
|
if (!syncobjs[i]) {
|
|
ret = -ENOENT;
|
|
goto err_put_syncobjs;
|
|
}
|
|
}
|
|
|
|
kfree(handles);
|
|
*syncobjs_out = syncobjs;
|
|
return 0;
|
|
|
|
err_put_syncobjs:
|
|
while (i-- > 0)
|
|
drm_syncobj_put(syncobjs[i]);
|
|
kfree(syncobjs);
|
|
err_free_handles:
|
|
kfree(handles);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void drm_syncobj_array_free(struct drm_syncobj **syncobjs,
|
|
uint32_t count)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < count; i++)
|
|
drm_syncobj_put(syncobjs[i]);
|
|
kfree(syncobjs);
|
|
}
|
|
|
|
int
|
|
drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_wait *args = data;
|
|
struct drm_syncobj **syncobjs;
|
|
int ret = 0;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL |
|
|
DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT))
|
|
return -EINVAL;
|
|
|
|
if (args->count_handles == 0)
|
|
return -EINVAL;
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
u64_to_user_ptr(args->handles),
|
|
args->count_handles,
|
|
&syncobjs);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = drm_syncobj_array_wait(dev, file_private,
|
|
args, NULL, syncobjs, false);
|
|
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_timeline_wait *args = data;
|
|
struct drm_syncobj **syncobjs;
|
|
int ret = 0;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL |
|
|
DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
|
|
DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE))
|
|
return -EINVAL;
|
|
|
|
if (args->count_handles == 0)
|
|
return -EINVAL;
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
u64_to_user_ptr(args->handles),
|
|
args->count_handles,
|
|
&syncobjs);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = drm_syncobj_array_wait(dev, file_private,
|
|
NULL, args, syncobjs, true);
|
|
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
int
|
|
drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_array *args = data;
|
|
struct drm_syncobj **syncobjs;
|
|
uint32_t i;
|
|
int ret;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->pad != 0)
|
|
return -EINVAL;
|
|
|
|
if (args->count_handles == 0)
|
|
return -EINVAL;
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
u64_to_user_ptr(args->handles),
|
|
args->count_handles,
|
|
&syncobjs);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
for (i = 0; i < args->count_handles; i++)
|
|
drm_syncobj_replace_fence(syncobjs[i], NULL);
|
|
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_array *args = data;
|
|
struct drm_syncobj **syncobjs;
|
|
uint32_t i;
|
|
int ret;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->pad != 0)
|
|
return -EINVAL;
|
|
|
|
if (args->count_handles == 0)
|
|
return -EINVAL;
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
u64_to_user_ptr(args->handles),
|
|
args->count_handles,
|
|
&syncobjs);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
for (i = 0; i < args->count_handles; i++)
|
|
drm_syncobj_assign_null_handle(syncobjs[i]);
|
|
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_timeline_array *args = data;
|
|
struct drm_syncobj **syncobjs;
|
|
struct dma_fence_chain **chains;
|
|
uint64_t *points;
|
|
uint32_t i, j;
|
|
int ret;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->flags != 0)
|
|
return -EINVAL;
|
|
|
|
if (args->count_handles == 0)
|
|
return -EINVAL;
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
u64_to_user_ptr(args->handles),
|
|
args->count_handles,
|
|
&syncobjs);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
points = kmalloc_array(args->count_handles, sizeof(*points),
|
|
GFP_KERNEL);
|
|
if (!points) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
if (!u64_to_user_ptr(args->points)) {
|
|
memset(points, 0, args->count_handles * sizeof(uint64_t));
|
|
} else if (copy_from_user(points, u64_to_user_ptr(args->points),
|
|
sizeof(uint64_t) * args->count_handles)) {
|
|
ret = -EFAULT;
|
|
goto err_points;
|
|
}
|
|
|
|
chains = kmalloc_array(args->count_handles, sizeof(void *), GFP_KERNEL);
|
|
if (!chains) {
|
|
ret = -ENOMEM;
|
|
goto err_points;
|
|
}
|
|
for (i = 0; i < args->count_handles; i++) {
|
|
chains[i] = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);
|
|
if (!chains[i]) {
|
|
for (j = 0; j < i; j++)
|
|
kfree(chains[j]);
|
|
ret = -ENOMEM;
|
|
goto err_chains;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < args->count_handles; i++) {
|
|
struct dma_fence *fence = dma_fence_get_stub();
|
|
|
|
drm_syncobj_add_point(syncobjs[i], chains[i],
|
|
fence, points[i]);
|
|
dma_fence_put(fence);
|
|
}
|
|
err_chains:
|
|
kfree(chains);
|
|
err_points:
|
|
kfree(points);
|
|
out:
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_private)
|
|
{
|
|
struct drm_syncobj_timeline_array *args = data;
|
|
struct drm_syncobj **syncobjs;
|
|
uint64_t __user *points = u64_to_user_ptr(args->points);
|
|
uint32_t i;
|
|
int ret;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (args->flags & ~DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED)
|
|
return -EINVAL;
|
|
|
|
if (args->count_handles == 0)
|
|
return -EINVAL;
|
|
|
|
ret = drm_syncobj_array_find(file_private,
|
|
u64_to_user_ptr(args->handles),
|
|
args->count_handles,
|
|
&syncobjs);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
for (i = 0; i < args->count_handles; i++) {
|
|
struct dma_fence_chain *chain;
|
|
struct dma_fence *fence;
|
|
uint64_t point;
|
|
|
|
fence = drm_syncobj_fence_get(syncobjs[i]);
|
|
chain = to_dma_fence_chain(fence);
|
|
if (chain) {
|
|
struct dma_fence *iter, *last_signaled =
|
|
dma_fence_get(fence);
|
|
|
|
if (args->flags &
|
|
DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) {
|
|
point = fence->seqno;
|
|
} else {
|
|
dma_fence_chain_for_each(iter, fence) {
|
|
if (iter->context != fence->context) {
|
|
dma_fence_put(iter);
|
|
/* It is most likely that timeline has
|
|
* unorder points. */
|
|
break;
|
|
}
|
|
dma_fence_put(last_signaled);
|
|
last_signaled = dma_fence_get(iter);
|
|
}
|
|
point = dma_fence_is_signaled(last_signaled) ?
|
|
last_signaled->seqno :
|
|
to_dma_fence_chain(last_signaled)->prev_seqno;
|
|
}
|
|
dma_fence_put(last_signaled);
|
|
} else {
|
|
point = 0;
|
|
}
|
|
dma_fence_put(fence);
|
|
ret = copy_to_user(&points[i], &point, sizeof(uint64_t));
|
|
ret = ret ? -EFAULT : 0;
|
|
if (ret)
|
|
break;
|
|
}
|
|
drm_syncobj_array_free(syncobjs, args->count_handles);
|
|
|
|
return ret;
|
|
}
|