| 1 | |
| 2 | * Copyright 2017 Red Hat
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| 3 | * Parts ported from amdgpu (fence wait code).
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| 4 | * Copyright 2016 Advanced Micro Devices, Inc.
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| 5 | *
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 7 | * copy of this software and associated documentation files (the "Software"),
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| 8 | * to deal in the Software without restriction, including without limitation
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| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 10 | * and/or sell copies of the Software, and to permit persons to whom the
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| 11 | * Software is furnished to do so, subject to the following conditions:
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| 12 | *
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| 13 | * The above copyright notice and this permission notice (including the next
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| 14 | * paragraph) shall be included in all copies or substantial portions of the
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| 15 | * Software.
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| 16 | *
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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| 23 | * IN THE SOFTWARE.
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| 24 | *
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| 25 | * Authors:
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| 26 | *
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| 27 |
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| 28 |
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| 29 | |
| 30 | * DOC: Overview
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| 31 | *
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| 32 | * DRM synchronisation objects (syncobj, see struct &drm_syncobj) provide a
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| 33 | * container for a synchronization primitive which can be used by userspace
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| 34 | * to explicitly synchronize GPU commands, can be shared between userspace
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| 35 | * processes, and can be shared between different DRM drivers.
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| 36 | * Their primary use-case is to implement Vulkan fences and semaphores.
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| 37 | * The syncobj userspace API provides ioctls for several operations:
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| 38 | *
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| 39 | * - Creation and destruction of syncobjs
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| 40 | * - Import and export of syncobjs to/from a syncobj file descriptor
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| 41 | * - Import and export a syncobj's underlying fence to/from a sync file
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| 42 | * - Reset a syncobj (set its fence to NULL)
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| 43 | * - Signal a syncobj (set a trivially signaled fence)
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| 44 | * - Wait for a syncobj's fence to appear and be signaled
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| 45 | *
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| 46 | * The syncobj userspace API also provides operations to manipulate a syncobj
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| 47 | * in terms of a timeline of struct &dma_fence_chain rather than a single
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| 48 | * struct &dma_fence, through the following operations:
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| 49 | *
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| 50 | * - Signal a given point on the timeline
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| 51 | * - Wait for a given point to appear and/or be signaled
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| 52 | * - Import and export from/to a given point of a timeline
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| 53 | *
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| 54 | * At it's core, a syncobj is simply a wrapper around a pointer to a struct
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| 55 | * &dma_fence which may be NULL.
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| 56 | * When a syncobj is first created, its pointer is either NULL or a pointer
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| 57 | * to an already signaled fence depending on whether the
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| 58 | * &DRM_SYNCOBJ_CREATE_SIGNALED flag is passed to
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| 59 | * &DRM_IOCTL_SYNCOBJ_CREATE.
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| 60 | *
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| 61 | * If the syncobj is considered as a binary (its state is either signaled or
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| 62 | * unsignaled) primitive, when GPU work is enqueued in a DRM driver to signal
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| 63 | * the syncobj, the syncobj's fence is replaced with a fence which will be
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| 64 | * signaled by the completion of that work.
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| 65 | * If the syncobj is considered as a timeline primitive, when GPU work is
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| 66 | * enqueued in a DRM driver to signal the a given point of the syncobj, a new
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| 67 | * struct &dma_fence_chain pointing to the DRM driver's fence and also
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| 68 | * pointing to the previous fence that was in the syncobj. The new struct
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| 69 | * &dma_fence_chain fence replace the syncobj's fence and will be signaled by
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| 70 | * completion of the DRM driver's work and also any work associated with the
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| 71 | * fence previously in the syncobj.
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| 72 | *
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| 73 | * When GPU work which waits on a syncobj is enqueued in a DRM driver, at the
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| 74 | * time the work is enqueued, it waits on the syncobj's fence before
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| 75 | * submitting the work to hardware. That fence is either :
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| 76 | *
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| 77 | * - The syncobj's current fence if the syncobj is considered as a binary
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| 78 | * primitive.
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| 79 | * - The struct &dma_fence associated with a given point if the syncobj is
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| 80 | * considered as a timeline primitive.
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| 81 | *
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| 82 | * If the syncobj's fence is NULL or not present in the syncobj's timeline,
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| 83 | * the enqueue operation is expected to fail.
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| 84 | *
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| 85 | * With binary syncobj, all manipulation of the syncobjs's fence happens in
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| 86 | * terms of the current fence at the time the ioctl is called by userspace
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| 87 | * regardless of whether that operation is an immediate host-side operation
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| 88 | * (signal or reset) or or an operation which is enqueued in some driver
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| 89 | * queue. &DRM_IOCTL_SYNCOBJ_RESET and &DRM_IOCTL_SYNCOBJ_SIGNAL can be used
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| 90 | * to manipulate a syncobj from the host by resetting its pointer to NULL or
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| 91 | * setting its pointer to a fence which is already signaled.
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| 92 | *
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| 93 | * With a timeline syncobj, all manipulation of the synobj's fence happens in
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| 94 | * terms of a u64 value referring to point in the timeline. See
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| 95 | * dma_fence_chain_find_seqno() to see how a given point is found in the
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| 96 | * timeline.
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| 97 | *
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| 98 | * Note that applications should be careful to always use timeline set of
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| 99 | * ioctl() when dealing with syncobj considered as timeline. Using a binary
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| 100 | * set of ioctl() with a syncobj considered as timeline could result incorrect
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| 101 | * synchronization. The use of binary syncobj is supported through the
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| 102 | * timeline set of ioctl() by using a point value of 0, this will reproduce
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| 103 | * the behavior of the binary set of ioctl() (for example replace the
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| 104 | * syncobj's fence when signaling).
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| 105 | *
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| 106 | *
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| 107 | * Host-side wait on syncobjs
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| 108 | * --------------------------
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| 109 | *
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| 110 | * &DRM_IOCTL_SYNCOBJ_WAIT takes an array of syncobj handles and does a
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| 111 | * host-side wait on all of the syncobj fences simultaneously.
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| 112 | * If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL is set, the wait ioctl will wait on
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| 113 | * all of the syncobj fences to be signaled before it returns.
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| 114 | * Otherwise, it returns once at least one syncobj fence has been signaled
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| 115 | * and the index of a signaled fence is written back to the client.
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| 116 | *
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| 117 | * Unlike the enqueued GPU work dependencies which fail if they see a NULL
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| 118 | * fence in a syncobj, if &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT is set,
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| 119 | * the host-side wait will first wait for the syncobj to receive a non-NULL
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| 120 | * fence and then wait on that fence.
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| 121 | * If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT is not set and any one of the
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| 122 | * syncobjs in the array has a NULL fence, -EINVAL will be returned.
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| 123 | * Assuming the syncobj starts off with a NULL fence, this allows a client
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| 124 | * to do a host wait in one thread (or process) which waits on GPU work
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| 125 | * submitted in another thread (or process) without having to manually
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| 126 | * synchronize between the two.
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| 127 | * This requirement is inherited from the Vulkan fence API.
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| 128 | *
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| 129 | * If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE is set, the ioctl will also set
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| 130 | * a fence deadline hint on the backing fences before waiting, to provide the
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| 131 | * fence signaler with an appropriate sense of urgency. The deadline is
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| 132 | * specified as an absolute &CLOCK_MONOTONIC value in units of ns.
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| 133 | *
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| 134 | * Similarly, &DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT takes an array of syncobj
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| 135 | * handles as well as an array of u64 points and does a host-side wait on all
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| 136 | * of syncobj fences at the given points simultaneously.
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| 137 | *
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| 138 | * &DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT also adds the ability to wait for a given
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| 139 | * fence to materialize on the timeline without waiting for the fence to be
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| 140 | * signaled by using the &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE flag. This
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| 141 | * requirement is inherited from the wait-before-signal behavior required by
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| 142 | * the Vulkan timeline semaphore API.
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| 143 | *
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| 144 | * Alternatively, &DRM_IOCTL_SYNCOBJ_EVENTFD can be used to wait without
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| 145 | * blocking: an eventfd will be signaled when the syncobj is. This is useful to
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| 146 | * integrate the wait in an event loop.
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| 147 | *
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| 148 | *
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| 149 | * Import/export of syncobjs
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| 150 | * -------------------------
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| 151 | *
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| 152 | * &DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE and &DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD
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| 153 | * provide two mechanisms for import/export of syncobjs.
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| 154 | *
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| 155 | * The first lets the client import or export an entire syncobj to a file
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| 156 | * descriptor.
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| 157 | * These fd's are opaque and have no other use case, except passing the
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| 158 | * syncobj between processes.
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| 159 | * All exported file descriptors and any syncobj handles created as a
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| 160 | * result of importing those file descriptors own a reference to the
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| 161 | * same underlying struct &drm_syncobj and the syncobj can be used
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| 162 | * persistently across all the processes with which it is shared.
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| 163 | * The syncobj is freed only once the last reference is dropped.
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| 164 | * Unlike dma-buf, importing a syncobj creates a new handle (with its own
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| 165 | * reference) for every import instead of de-duplicating.
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| 166 | * The primary use-case of this persistent import/export is for shared
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| 167 | * Vulkan fences and semaphores.
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| 168 | *
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| 169 | * The second import/export mechanism, which is indicated by
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| 170 | * &DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE or
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| 171 | * &DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE lets the client
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| 172 | * import/export the syncobj's current fence from/to a &sync_file.
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| 173 | * When a syncobj is exported to a sync file, that sync file wraps the
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| 174 | * sycnobj's fence at the time of export and any later signal or reset
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| 175 | * operations on the syncobj will not affect the exported sync file.
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| 176 | * When a sync file is imported into a syncobj, the syncobj's fence is set
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| 177 | * to the fence wrapped by that sync file.
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| 178 | * Because sync files are immutable, resetting or signaling the syncobj
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| 179 | * will not affect any sync files whose fences have been imported into the
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| 180 | * syncobj.
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| 181 | *
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| 182 | *
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| 183 | * Import/export of timeline points in timeline syncobjs
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| 184 | * -----------------------------------------------------
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| 185 | *
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| 186 | * &DRM_IOCTL_SYNCOBJ_TRANSFER provides a mechanism to transfer a struct
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| 187 | * &dma_fence_chain of a syncobj at a given u64 point to another u64 point
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| 188 | * into another syncobj.
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| 189 | *
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| 190 | * Note that if you want to transfer a struct &dma_fence_chain from a given
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| 191 | * point on a timeline syncobj from/into a binary syncobj, you can use the
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| 192 | * point 0 to mean take/replace the fence in the syncobj.
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| 193 |
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| 194 |
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| 195 | #include <linux/anon_inodes.h>
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| 196 | #include <linux/dma-fence-unwrap.h>
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| 197 | #include <linux/eventfd.h>
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| 198 | #include <linux/export.h>
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| 199 | #include <linux/file.h>
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| 200 | #include <linux/fs.h>
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| 201 | #include <linux/sched/signal.h>
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| 202 | #include <linux/sync_file.h>
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| 203 | #include <linux/uaccess.h>
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| 204 |
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| 205 | #include <drm/drm.h>
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| 206 | #include <drm/drm_drv.h>
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| 207 | #include <drm/drm_file.h>
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| 208 | #include <drm/drm_gem.h>
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| 209 | #include <drm/drm_print.h>
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| 210 | #include <drm/drm_syncobj.h>
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| 211 | #include <drm/drm_utils.h>
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| 212 |
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| 213 | #include "drm_internal.h"
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| 214 |
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| 215 | struct syncobj_wait_entry {
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| 216 | struct list_head node;
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| 217 | struct task_struct *task;
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| 218 | struct dma_fence *fence;
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| 219 | struct dma_fence_cb fence_cb;
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| 220 | u64 point;
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| 221 | };
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| 222 |
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| 223 | static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
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| 224 | struct syncobj_wait_entry *wait);
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| 225 |
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| 226 | struct syncobj_eventfd_entry {
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| 227 | struct list_head node;
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| 228 | struct dma_fence *fence;
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| 229 | struct dma_fence_cb fence_cb;
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| 230 | struct drm_syncobj *syncobj;
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| 231 | struct eventfd_ctx *ev_fd_ctx;
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| 232 | u64 point;
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| 233 | u32 flags;
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| 234 | };
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| 235 |
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| 236 | static void
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| 237 | syncobj_eventfd_entry_func(struct drm_syncobj *syncobj,
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| 238 | struct syncobj_eventfd_entry *entry);
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| 239 |
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| 240 | |
| 241 | * drm_syncobj_find - lookup and reference a sync object.
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| 242 | * @file_private: drm file private pointer
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| 243 | * @handle: sync object handle to lookup.
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| 244 | *
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| 245 | * Returns a reference to the syncobj pointed to by handle or NULL. The
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| 246 | * reference must be released by calling drm_syncobj_put().
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| 247 |
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| 248 | struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
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| 249 | u32 handle)
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| 250 | {
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| 251 | struct drm_syncobj *syncobj;
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| 252 |
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| 253 | xa_lock(&file_private->syncobj_xa);
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| 254 |
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| 255 |
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| 256 | syncobj = xa_load(&file_private->syncobj_xa, handle);
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| 257 | if (syncobj)
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| 258 | drm_syncobj_get(syncobj);
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| 259 |
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| 260 | xa_unlock(&file_private->syncobj_xa);
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| 261 |
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| 262 | return syncobj;
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| 263 | }
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| 264 | EXPORT_SYMBOL(drm_syncobj_find);
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| 265 |
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| 266 | static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj,
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| 267 | struct syncobj_wait_entry *wait)
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| 268 | {
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| 269 | struct dma_fence *fence;
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| 270 |
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| 271 | if (wait->fence)
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| 272 | return;
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| 273 |
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| 274 | spin_lock(&syncobj->lock);
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| 275 | |
| 276 | * have the lock, try one more time just to be sure we don't add a
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| 277 | * callback when a fence has already been set.
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| 278 |
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| 279 | fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, 1));
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| 280 | if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {
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| 281 | dma_fence_put(fence);
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| 282 | list_add_tail(&wait->node, &syncobj->cb_list);
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| 283 | } else if (!fence) {
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| 284 | wait->fence = dma_fence_get_stub();
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| 285 | } else {
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| 286 | wait->fence = fence;
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| 287 | }
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| 288 | spin_unlock(&syncobj->lock);
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| 289 | }
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| 290 |
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| 291 | static void drm_syncobj_remove_wait(struct drm_syncobj *syncobj,
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| 292 | struct syncobj_wait_entry *wait)
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| 293 | {
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| 294 | if (!wait->node.next)
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| 295 | return;
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| 296 |
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| 297 | spin_lock(&syncobj->lock);
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| 298 | list_del_init(&wait->node);
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| 299 | spin_unlock(&syncobj->lock);
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| 300 | }
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| 301 |
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| 302 | static void
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| 303 | syncobj_eventfd_entry_free(struct syncobj_eventfd_entry *entry)
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| 304 | {
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| 305 | eventfd_ctx_put(entry->ev_fd_ctx);
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| 306 | dma_fence_put(entry->fence);
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| 307 | |
| 308 | * already been removed from the list.
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| 309 |
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| 310 | list_del(&entry->node);
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| 311 | kfree(entry);
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| 312 | }
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| 313 |
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| 314 | static void
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| 315 | drm_syncobj_add_eventfd(struct drm_syncobj *syncobj,
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| 316 | struct syncobj_eventfd_entry *entry)
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| 317 | {
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| 318 | spin_lock(&syncobj->lock);
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| 319 | list_add_tail(&entry->node, &syncobj->ev_fd_list);
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| 320 | syncobj_eventfd_entry_func(syncobj, entry);
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| 321 | spin_unlock(&syncobj->lock);
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| 322 | }
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| 323 |
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| 324 | |
| 325 | * drm_syncobj_add_point - add new timeline point to the syncobj
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| 326 | * @syncobj: sync object to add timeline point do
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| 327 | * @chain: chain node to use to add the point
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| 328 | * @fence: fence to encapsulate in the chain node
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| 329 | * @point: sequence number to use for the point
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| 330 | *
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| 331 | * Add the chain node as new timeline point to the syncobj.
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| 332 |
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| 333 | void drm_syncobj_add_point(struct drm_syncobj *syncobj,
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| 334 | struct dma_fence_chain *chain,
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| 335 | struct dma_fence *fence,
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| 336 | uint64_t point)
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| 337 | {
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| 338 | struct syncobj_wait_entry *wait_cur, *wait_tmp;
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| 339 | struct syncobj_eventfd_entry *ev_fd_cur, *ev_fd_tmp;
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| 340 | struct dma_fence *prev;
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| 341 |
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| 342 | dma_fence_get(fence);
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| 343 |
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| 344 | spin_lock(&syncobj->lock);
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| 345 |
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| 346 | prev = drm_syncobj_fence_get(syncobj);
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| 347 |
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| 348 | if (prev && prev->seqno >= point)
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| 349 | DRM_DEBUG("You are adding an unorder point to timeline!\n");
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| 350 | dma_fence_chain_init(chain, prev, fence, point);
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| 351 | rcu_assign_pointer(syncobj->fence, &chain->base);
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| 352 |
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| 353 | list_for_each_entry_safe(wait_cur, wait_tmp, &syncobj->cb_list, node)
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| 354 | syncobj_wait_syncobj_func(syncobj, wait_cur);
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| 355 | list_for_each_entry_safe(ev_fd_cur, ev_fd_tmp, &syncobj->ev_fd_list, node)
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| 356 | syncobj_eventfd_entry_func(syncobj, ev_fd_cur);
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| 357 | spin_unlock(&syncobj->lock);
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| 358 |
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| 359 |
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| 360 | dma_fence_chain_for_each(fence, prev);
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| 361 | dma_fence_put(prev);
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| 362 | }
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| 363 | EXPORT_SYMBOL(drm_syncobj_add_point);
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| 364 |
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| 365 | |
| 366 | * drm_syncobj_replace_fence - replace fence in a sync object.
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| 367 | * @syncobj: Sync object to replace fence in
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| 368 | * @fence: fence to install in sync file.
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| 369 | *
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| 370 | * This replaces the fence on a sync object.
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| 371 |
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| 372 | void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
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| 373 | struct dma_fence *fence)
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| 374 | {
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| 375 | struct dma_fence *old_fence;
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| 376 | struct syncobj_wait_entry *wait_cur, *wait_tmp;
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| 377 | struct syncobj_eventfd_entry *ev_fd_cur, *ev_fd_tmp;
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| 378 |
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| 379 | if (fence)
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| 380 | dma_fence_get(fence);
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| 381 |
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| 382 | spin_lock(&syncobj->lock);
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| 383 |
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| 384 | old_fence = rcu_dereference_protected(syncobj->fence,
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| 385 | lockdep_is_held(&syncobj->lock));
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| 386 | rcu_assign_pointer(syncobj->fence, fence);
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| 387 |
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| 388 | if (fence != old_fence) {
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| 389 | list_for_each_entry_safe(wait_cur, wait_tmp, &syncobj->cb_list, node)
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| 390 | syncobj_wait_syncobj_func(syncobj, wait_cur);
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| 391 | list_for_each_entry_safe(ev_fd_cur, ev_fd_tmp, &syncobj->ev_fd_list, node)
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| 392 | syncobj_eventfd_entry_func(syncobj, ev_fd_cur);
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| 393 | }
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| 394 |
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| 395 | spin_unlock(&syncobj->lock);
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| 396 |
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| 397 | dma_fence_put(old_fence);
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| 398 | }
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| 399 | EXPORT_SYMBOL(drm_syncobj_replace_fence);
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| 400 |
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| 401 | |
| 402 | * drm_syncobj_assign_null_handle - assign a stub fence to the sync object
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| 403 | * @syncobj: sync object to assign the fence on
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| 404 | *
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| 405 | * Assign a already signaled stub fence to the sync object.
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| 406 |
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| 407 | static int drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
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| 408 | {
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| 409 | struct dma_fence *fence = dma_fence_allocate_private_stub(ktime_get());
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| 410 |
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| 411 | if (!fence)
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| 412 | return -ENOMEM;
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| 413 |
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| 414 | drm_syncobj_replace_fence(syncobj, fence);
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| 415 | dma_fence_put(fence);
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| 416 | return 0;
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| 417 | }
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| 418 |
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| 419 |
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| 420 | #define DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT 5000000000ULL
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| 421 | |
| 422 | * drm_syncobj_find_fence - lookup and reference the fence in a sync object
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| 423 | * @file_private: drm file private pointer
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| 424 | * @handle: sync object handle to lookup.
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| 425 | * @point: timeline point
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| 426 | * @flags: DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT or not
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| 427 | * @fence: out parameter for the fence
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| 428 | *
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| 429 | * This is just a convenience function that combines drm_syncobj_find() and
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| 430 | * drm_syncobj_fence_get().
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| 431 | *
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| 432 | * Returns 0 on success or a negative error value on failure. On success @fence
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| 433 | * contains a reference to the fence, which must be released by calling
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| 434 | * dma_fence_put().
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| 435 |
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| 436 | int drm_syncobj_find_fence(struct drm_file *file_private,
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| 437 | u32 handle, u64 point, u64 flags,
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| 438 | struct dma_fence **fence)
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| 439 | {
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| 440 | struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
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| 441 | struct syncobj_wait_entry wait;
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| 442 | u64 timeout = nsecs_to_jiffies64(DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT);
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| 443 | int ret;
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| 444 |
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| 445 | if (!syncobj)
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| 446 | return -ENOENT;
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| 447 |
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| 448 | if (flags & ~DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
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| 449 | ret = -EINVAL;
|
| 450 | goto out;
|
| 451 | }
|
| 452 |
|
| 453 | |
| 454 | * trivial deadlock with page faults for example. Make lockdep complain
|
| 455 | * about it early on.
|
| 456 |
|
| 457 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
|
| 458 | might_sleep();
|
| 459 | lockdep_assert_none_held_once();
|
| 460 | }
|
| 461 |
|
| 462 | *fence = drm_syncobj_fence_get(syncobj);
|
| 463 |
|
| 464 | if (*fence) {
|
| 465 | ret = dma_fence_chain_find_seqno(fence, point);
|
| 466 | if (!ret) {
|
| 467 | |
| 468 | * drm_syncobj_find_fence may return a NULL
|
| 469 | * fence. To make sure the recipient gets
|
| 470 | * signalled, use a new fence instead.
|
| 471 |
|
| 472 | if (!*fence)
|
| 473 | *fence = dma_fence_get_stub();
|
| 474 |
|
| 475 | goto out;
|
| 476 | }
|
| 477 | dma_fence_put(*fence);
|
| 478 | } else {
|
| 479 | ret = -EINVAL;
|
| 480 | }
|
| 481 |
|
| 482 | if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT))
|
| 483 | goto out;
|
| 484 |
|
| 485 | memset(&wait, 0, sizeof(wait));
|
| 486 | wait.task = current;
|
| 487 | wait.point = point;
|
| 488 | drm_syncobj_fence_add_wait(syncobj, &wait);
|
| 489 |
|
| 490 | do {
|
| 491 | set_current_state(TASK_INTERRUPTIBLE);
|
| 492 | if (wait.fence) {
|
| 493 | ret = 0;
|
| 494 | break;
|
| 495 | }
|
| 496 | if (timeout == 0) {
|
| 497 | ret = -ETIME;
|
| 498 | break;
|
| 499 | }
|
| 500 |
|
| 501 | if (signal_pending(current)) {
|
| 502 | ret = -ERESTARTSYS;
|
| 503 | break;
|
| 504 | }
|
| 505 |
|
| 506 | timeout = schedule_timeout(timeout);
|
| 507 | } while (1);
|
| 508 |
|
| 509 | __set_current_state(TASK_RUNNING);
|
| 510 | *fence = wait.fence;
|
| 511 |
|
| 512 | if (wait.node.next)
|
| 513 | drm_syncobj_remove_wait(syncobj, &wait);
|
| 514 |
|
| 515 | out:
|
| 516 | drm_syncobj_put(syncobj);
|
| 517 |
|
| 518 | return ret;
|
| 519 | }
|
| 520 | EXPORT_SYMBOL(drm_syncobj_find_fence);
|
| 521 |
|
| 522 | |
| 523 | * drm_syncobj_free - free a sync object.
|
| 524 | * @kref: kref to free.
|
| 525 | *
|
| 526 | * Only to be called from kref_put in drm_syncobj_put.
|
| 527 |
|
| 528 | void drm_syncobj_free(struct kref *kref)
|
| 529 | {
|
| 530 | struct drm_syncobj *syncobj = container_of(kref,
|
| 531 | struct drm_syncobj,
|
| 532 | refcount);
|
| 533 | struct syncobj_eventfd_entry *ev_fd_cur, *ev_fd_tmp;
|
| 534 |
|
| 535 | drm_syncobj_replace_fence(syncobj, NULL);
|
| 536 |
|
| 537 | list_for_each_entry_safe(ev_fd_cur, ev_fd_tmp, &syncobj->ev_fd_list, node)
|
| 538 | syncobj_eventfd_entry_free(ev_fd_cur);
|
| 539 |
|
| 540 | kfree(syncobj);
|
| 541 | }
|
| 542 | EXPORT_SYMBOL(drm_syncobj_free);
|
| 543 |
|
| 544 | |
| 545 | * drm_syncobj_create - create a new syncobj
|
| 546 | * @out_syncobj: returned syncobj
|
| 547 | * @flags: DRM_SYNCOBJ_* flags
|
| 548 | * @fence: if non-NULL, the syncobj will represent this fence
|
| 549 | *
|
| 550 | * This is the first function to create a sync object. After creating, drivers
|
| 551 | * probably want to make it available to userspace, either through
|
| 552 | * drm_syncobj_get_handle() or drm_syncobj_get_fd().
|
| 553 | *
|
| 554 | * Returns 0 on success or a negative error value on failure.
|
| 555 |
|
| 556 | int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
|
| 557 | struct dma_fence *fence)
|
| 558 | {
|
| 559 | int ret;
|
| 560 | struct drm_syncobj *syncobj;
|
| 561 |
|
| 562 | syncobj = kzalloc_obj(struct drm_syncobj);
|
| 563 | if (!syncobj)
|
| 564 | return -ENOMEM;
|
| 565 |
|
| 566 | kref_init(&syncobj->refcount);
|
| 567 | INIT_LIST_HEAD(&syncobj->cb_list);
|
| 568 | INIT_LIST_HEAD(&syncobj->ev_fd_list);
|
| 569 | spin_lock_init(&syncobj->lock);
|
| 570 |
|
| 571 | if (flags & DRM_SYNCOBJ_CREATE_SIGNALED) {
|
| 572 | ret = drm_syncobj_assign_null_handle(syncobj);
|
| 573 | if (ret < 0) {
|
| 574 | drm_syncobj_put(syncobj);
|
| 575 | return ret;
|
| 576 | }
|
| 577 | }
|
| 578 |
|
| 579 | if (fence)
|
| 580 | drm_syncobj_replace_fence(syncobj, fence);
|
| 581 |
|
| 582 | *out_syncobj = syncobj;
|
| 583 | return 0;
|
| 584 | }
|
| 585 | EXPORT_SYMBOL(drm_syncobj_create);
|
| 586 |
|
| 587 | |
| 588 | * drm_syncobj_get_handle - get a handle from a syncobj
|
| 589 | * @file_private: drm file private pointer
|
| 590 | * @syncobj: Sync object to export
|
| 591 | * @handle: out parameter with the new handle
|
| 592 | *
|
| 593 | * Exports a sync object created with drm_syncobj_create() as a handle on
|
| 594 | * @file_private to userspace.
|
| 595 | *
|
| 596 | * Returns 0 on success or a negative error value on failure.
|
| 597 |
|
| 598 | int drm_syncobj_get_handle(struct drm_file *file_private,
|
| 599 | struct drm_syncobj *syncobj, u32 *handle)
|
| 600 | {
|
| 601 | int ret;
|
| 602 |
|
| 603 |
|
| 604 | drm_syncobj_get(syncobj);
|
| 605 |
|
| 606 | ret = xa_alloc(&file_private->syncobj_xa, handle, syncobj, xa_limit_32b,
|
| 607 | GFP_KERNEL);
|
| 608 | if (ret)
|
| 609 | drm_syncobj_put(syncobj);
|
| 610 |
|
| 611 | return ret;
|
| 612 | }
|
| 613 | EXPORT_SYMBOL(drm_syncobj_get_handle);
|
| 614 |
|
| 615 | static int drm_syncobj_create_as_handle(struct drm_file *file_private,
|
| 616 | u32 *handle, uint32_t flags)
|
| 617 | {
|
| 618 | int ret;
|
| 619 | struct drm_syncobj *syncobj;
|
| 620 |
|
| 621 | ret = drm_syncobj_create(&syncobj, flags, NULL);
|
| 622 | if (ret)
|
| 623 | return ret;
|
| 624 |
|
| 625 | ret = drm_syncobj_get_handle(file_private, syncobj, handle);
|
| 626 | drm_syncobj_put(syncobj);
|
| 627 | return ret;
|
| 628 | }
|
| 629 |
|
| 630 | static int drm_syncobj_destroy(struct drm_file *file_private,
|
| 631 | u32 handle)
|
| 632 | {
|
| 633 | struct drm_syncobj *syncobj;
|
| 634 |
|
| 635 | syncobj = xa_erase(&file_private->syncobj_xa, handle);
|
| 636 | if (!syncobj)
|
| 637 | return -EINVAL;
|
| 638 |
|
| 639 | drm_syncobj_put(syncobj);
|
| 640 | return 0;
|
| 641 | }
|
| 642 |
|
| 643 | static int drm_syncobj_file_release(struct inode *inode, struct file *file)
|
| 644 | {
|
| 645 | struct drm_syncobj *syncobj = file->private_data;
|
| 646 |
|
| 647 | drm_syncobj_put(syncobj);
|
| 648 | return 0;
|
| 649 | }
|
| 650 |
|
| 651 | static const struct file_operations drm_syncobj_file_fops = {
|
| 652 | .release = drm_syncobj_file_release,
|
| 653 | };
|
| 654 |
|
| 655 | |
| 656 | * drm_syncobj_get_fd - get a file descriptor from a syncobj
|
| 657 | * @syncobj: Sync object to export
|
| 658 | * @p_fd: out parameter with the new file descriptor
|
| 659 | *
|
| 660 | * Exports a sync object created with drm_syncobj_create() as a file descriptor.
|
| 661 | *
|
| 662 | * Returns 0 on success or a negative error value on failure.
|
| 663 |
|
| 664 | int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd)
|
| 665 | {
|
| 666 | struct file *file;
|
| 667 | int fd;
|
| 668 |
|
| 669 | fd = get_unused_fd_flags(O_CLOEXEC);
|
| 670 | if (fd < 0)
|
| 671 | return fd;
|
| 672 |
|
| 673 | file = anon_inode_getfile("syncobj_file",
|
| 674 | &drm_syncobj_file_fops,
|
| 675 | syncobj, 0);
|
| 676 | if (IS_ERR(file)) {
|
| 677 | put_unused_fd(fd);
|
| 678 | return PTR_ERR(file);
|
| 679 | }
|
| 680 |
|
| 681 | drm_syncobj_get(syncobj);
|
| 682 | fd_install(fd, file);
|
| 683 |
|
| 684 | *p_fd = fd;
|
| 685 | return 0;
|
| 686 | }
|
| 687 | EXPORT_SYMBOL(drm_syncobj_get_fd);
|
| 688 |
|
| 689 | static int drm_syncobj_handle_to_fd(struct drm_file *file_private,
|
| 690 | u32 handle, int *p_fd)
|
| 691 | {
|
| 692 | struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
|
| 693 | int ret;
|
| 694 |
|
| 695 | if (!syncobj)
|
| 696 | return -EINVAL;
|
| 697 |
|
| 698 | ret = drm_syncobj_get_fd(syncobj, p_fd);
|
| 699 | drm_syncobj_put(syncobj);
|
| 700 | return ret;
|
| 701 | }
|
| 702 |
|
| 703 | static int drm_syncobj_fd_to_handle(struct drm_file *file_private,
|
| 704 | int fd, u32 *handle)
|
| 705 | {
|
| 706 | struct drm_syncobj *syncobj;
|
| 707 | CLASS(fd, f)(fd);
|
| 708 | int ret;
|
| 709 |
|
| 710 | if (fd_empty(f))
|
| 711 | return -EINVAL;
|
| 712 |
|
| 713 | if (fd_file(f)->f_op != &drm_syncobj_file_fops)
|
| 714 | return -EINVAL;
|
| 715 |
|
| 716 |
|
| 717 | syncobj = fd_file(f)->private_data;
|
| 718 | drm_syncobj_get(syncobj);
|
| 719 |
|
| 720 | ret = xa_alloc(&file_private->syncobj_xa, handle, syncobj, xa_limit_32b,
|
| 721 | GFP_KERNEL);
|
| 722 | if (ret)
|
| 723 | drm_syncobj_put(syncobj);
|
| 724 |
|
| 725 | return ret;
|
| 726 | }
|
| 727 |
|
| 728 | static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private,
|
| 729 | int fd, int handle, u64 point)
|
| 730 | {
|
| 731 | struct dma_fence *fence = sync_file_get_fence(fd);
|
| 732 | struct drm_syncobj *syncobj;
|
| 733 |
|
| 734 | if (!fence)
|
| 735 | return -EINVAL;
|
| 736 |
|
| 737 | syncobj = drm_syncobj_find(file_private, handle);
|
| 738 | if (!syncobj) {
|
| 739 | dma_fence_put(fence);
|
| 740 | return -ENOENT;
|
| 741 | }
|
| 742 |
|
| 743 | if (point) {
|
| 744 | struct dma_fence_chain *chain = dma_fence_chain_alloc();
|
| 745 |
|
| 746 | if (!chain)
|
| 747 | return -ENOMEM;
|
| 748 |
|
| 749 | drm_syncobj_add_point(syncobj, chain, fence, point);
|
| 750 | } else {
|
| 751 | drm_syncobj_replace_fence(syncobj, fence);
|
| 752 | }
|
| 753 |
|
| 754 | dma_fence_put(fence);
|
| 755 | drm_syncobj_put(syncobj);
|
| 756 | return 0;
|
| 757 | }
|
| 758 |
|
| 759 | static int drm_syncobj_export_sync_file(struct drm_file *file_private,
|
| 760 | int handle, u64 point, int *p_fd)
|
| 761 | {
|
| 762 | int ret;
|
| 763 | struct dma_fence *fence;
|
| 764 | struct sync_file *sync_file;
|
| 765 | int fd = get_unused_fd_flags(O_CLOEXEC);
|
| 766 |
|
| 767 | if (fd < 0)
|
| 768 | return fd;
|
| 769 |
|
| 770 | ret = drm_syncobj_find_fence(file_private, handle, point, 0, &fence);
|
| 771 | if (ret)
|
| 772 | goto err_put_fd;
|
| 773 |
|
| 774 | sync_file = sync_file_create(fence);
|
| 775 |
|
| 776 | dma_fence_put(fence);
|
| 777 |
|
| 778 | if (!sync_file) {
|
| 779 | ret = -EINVAL;
|
| 780 | goto err_put_fd;
|
| 781 | }
|
| 782 |
|
| 783 | fd_install(fd, sync_file->file);
|
| 784 |
|
| 785 | *p_fd = fd;
|
| 786 | return 0;
|
| 787 | err_put_fd:
|
| 788 | put_unused_fd(fd);
|
| 789 | return ret;
|
| 790 | }
|
| 791 | |
| 792 | * drm_syncobj_open - initializes syncobj file-private structures at devnode open time
|
| 793 | * @file_private: drm file-private structure to set up
|
| 794 | *
|
| 795 | * Called at device open time, sets up the structure for handling refcounting
|
| 796 | * of sync objects.
|
| 797 |
|
| 798 | void
|
| 799 | drm_syncobj_open(struct drm_file *file_private)
|
| 800 | {
|
| 801 | xa_init_flags(&file_private->syncobj_xa, XA_FLAGS_ALLOC1);
|
| 802 | }
|
| 803 |
|
| 804 | |
| 805 | * drm_syncobj_release - release file-private sync object resources
|
| 806 | * @file_private: drm file-private structure to clean up
|
| 807 | *
|
| 808 | * Called at close time when the filp is going away.
|
| 809 | *
|
| 810 | * Releases any remaining references on objects by this filp.
|
| 811 |
|
| 812 | void
|
| 813 | drm_syncobj_release(struct drm_file *file_private)
|
| 814 | {
|
| 815 | struct drm_syncobj *syncobj;
|
| 816 | unsigned long handle;
|
| 817 |
|
| 818 | xa_for_each(&file_private->syncobj_xa, handle, syncobj)
|
| 819 | drm_syncobj_put(syncobj);
|
| 820 | xa_destroy(&file_private->syncobj_xa);
|
| 821 | }
|
| 822 |
|
| 823 | int
|
| 824 | drm_syncobj_create_ioctl(struct drm_device *dev, void *data,
|
| 825 | struct drm_file *file_private)
|
| 826 | {
|
| 827 | struct drm_syncobj_create *args = data;
|
| 828 |
|
| 829 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
| 830 | return -EOPNOTSUPP;
|
| 831 |
|
| 832 |
|
| 833 | if (args->flags & ~DRM_SYNCOBJ_CREATE_SIGNALED)
|
| 834 | return -EINVAL;
|
| 835 |
|
| 836 | return drm_syncobj_create_as_handle(file_private,
|
| 837 | &args->handle, args->flags);
|
| 838 | }
|
| 839 |
|
| 840 | int
|
| 841 | drm_syncobj_destroy_ioctl(struct drm_device *dev, void *data,
|
| 842 | struct drm_file *file_private)
|
| 843 | {
|
| 844 | struct drm_syncobj_destroy *args = data;
|
| 845 |
|
| 846 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
| 847 | return -EOPNOTSUPP;
|
| 848 |
|
| 849 |
|
| 850 | if (args->pad)
|
| 851 | return -EINVAL;
|
| 852 | return drm_syncobj_destroy(file_private, args->handle);
|
| 853 | }
|
| 854 |
|
| 855 | int
|
| 856 | drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data,
|
| 857 | struct drm_file *file_private)
|
| 858 | {
|
| 859 | struct drm_syncobj_handle *args = data;
|
| 860 | unsigned int valid_flags = DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE |
|
| 861 | DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE;
|
| 862 | u64 point = 0;
|
| 863 |
|
| 864 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
| 865 | return -EOPNOTSUPP;
|
| 866 |
|
| 867 | if (args->pad)
|
| 868 | return -EINVAL;
|
| 869 |
|
| 870 | if (args->flags & ~valid_flags)
|
| 871 | return -EINVAL;
|
| 872 |
|
| 873 | if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE)
|
| 874 | point = args->point;
|
| 875 |
|
| 876 | if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE)
|
| 877 | return drm_syncobj_export_sync_file(file_private, args->handle,
|
| 878 | point, &args->fd);
|
| 879 |
|
| 880 | if (args->point)
|
| 881 | return -EINVAL;
|
| 882 |
|
| 883 | return drm_syncobj_handle_to_fd(file_private, args->handle,
|
| 884 | &args->fd);
|
| 885 | }
|
| 886 |
|
| 887 | int
|
| 888 | drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
|
| 889 | struct drm_file *file_private)
|
| 890 | {
|
| 891 | struct drm_syncobj_handle *args = data;
|
| 892 | unsigned int valid_flags = DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE |
|
| 893 | DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE;
|
| 894 | u64 point = 0;
|
| 895 |
|
| 896 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
| 897 | return -EOPNOTSUPP;
|
| 898 |
|
| 899 | if (args->pad)
|
| 900 | return -EINVAL;
|
| 901 |
|
| 902 | if (args->flags & ~valid_flags)
|
| 903 | return -EINVAL;
|
| 904 |
|
| 905 | if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE)
|
| 906 | point = args->point;
|
| 907 |
|
| 908 | if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE)
|
| 909 | return drm_syncobj_import_sync_file_fence(file_private,
|
| 910 | args->fd,
|
| 911 | args->handle,
|
| 912 | point);
|
| 913 |
|
| 914 | if (args->point)
|
| 915 | return -EINVAL;
|
| 916 |
|
| 917 | return drm_syncobj_fd_to_handle(file_private, args->fd,
|
| 918 | &args->handle);
|
| 919 | }
|
| 920 |
|
| 921 | static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private,
|
| 922 | struct drm_syncobj_transfer *args)
|
| 923 | {
|
| 924 | struct drm_syncobj *timeline_syncobj = NULL;
|
| 925 | struct dma_fence *fence, *tmp;
|
| 926 | struct dma_fence_chain *chain;
|
| 927 | int ret;
|
| 928 |
|
| 929 | timeline_syncobj = drm_syncobj_find(file_private, args->dst_handle);
|
| 930 | if (!timeline_syncobj) {
|
| 931 | return -ENOENT;
|
| 932 | }
|
| 933 | ret = drm_syncobj_find_fence(file_private, args->src_handle,
|
| 934 | args->src_point, args->flags,
|
| 935 | &tmp);
|
| 936 | if (ret)
|
| 937 | goto err_put_timeline;
|
| 938 |
|
| 939 | fence = dma_fence_unwrap_merge(tmp);
|
| 940 | dma_fence_put(tmp);
|
| 941 | if (!fence) {
|
| 942 | ret = -ENOMEM;
|
| 943 | goto err_put_timeline;
|
| 944 | }
|
| 945 |
|
| 946 | chain = dma_fence_chain_alloc();
|
| 947 | if (!chain) {
|
| 948 | ret = -ENOMEM;
|
| 949 | goto err_free_fence;
|
| 950 | }
|
| 951 |
|
| 952 | drm_syncobj_add_point(timeline_syncobj, chain, fence, args->dst_point);
|
| 953 | err_free_fence:
|
| 954 | dma_fence_put(fence);
|
| 955 | err_put_timeline:
|
| 956 | drm_syncobj_put(timeline_syncobj);
|
| 957 |
|
| 958 | return ret;
|
| 959 | }
|
| 960 |
|
| 961 | static int
|
| 962 | drm_syncobj_transfer_to_binary(struct drm_file *file_private,
|
| 963 | struct drm_syncobj_transfer *args)
|
| 964 | {
|
| 965 | struct drm_syncobj *binary_syncobj = NULL;
|
| 966 | struct dma_fence *fence;
|
| 967 | int ret;
|
| 968 |
|
| 969 | binary_syncobj = drm_syncobj_find(file_private, args->dst_handle);
|
| 970 | if (!binary_syncobj)
|
| 971 | return -ENOENT;
|
| 972 | ret = drm_syncobj_find_fence(file_private, args->src_handle,
|
| 973 | args->src_point, args->flags, &fence);
|
| 974 | if (ret)
|
| 975 | goto err;
|
| 976 | drm_syncobj_replace_fence(binary_syncobj, fence);
|
| 977 | dma_fence_put(fence);
|
| 978 | err:
|
| 979 | drm_syncobj_put(binary_syncobj);
|
| 980 |
|
| 981 | return ret;
|
| 982 | }
|
| 983 | int
|
| 984 | drm_syncobj_transfer_ioctl(struct drm_device *dev, void *data,
|
| 985 | struct drm_file *file_private)
|
| 986 | {
|
| 987 | struct drm_syncobj_transfer *args = data;
|
| 988 | int ret;
|
| 989 |
|
| 990 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
| 991 | return -EOPNOTSUPP;
|
| 992 |
|
| 993 | if (args->pad)
|
| 994 | return -EINVAL;
|
| 995 |
|
| 996 | if (args->dst_point)
|
| 997 | ret = drm_syncobj_transfer_to_timeline(file_private, args);
|
| 998 | else
|
| 999 | ret = drm_syncobj_transfer_to_binary(file_private, args);
|
| 1000 |
|
| 1001 | return ret;
|
| 1002 | }
|
| 1003 |
|
| 1004 | static void syncobj_wait_fence_func(struct dma_fence *fence,
|
| 1005 | struct dma_fence_cb *cb)
|
| 1006 | {
|
| 1007 | struct syncobj_wait_entry *wait =
|
| 1008 | container_of(cb, struct syncobj_wait_entry, fence_cb);
|
| 1009 |
|
| 1010 | wake_up_process(wait->task);
|
| 1011 | }
|
| 1012 |
|
| 1013 | static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
|
| 1014 | struct syncobj_wait_entry *wait)
|
| 1015 | {
|
| 1016 | struct dma_fence *fence;
|
| 1017 |
|
| 1018 |
|
| 1019 | fence = rcu_dereference_protected(syncobj->fence,
|
| 1020 | lockdep_is_held(&syncobj->lock));
|
| 1021 | dma_fence_get(fence);
|
| 1022 | if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {
|
| 1023 | dma_fence_put(fence);
|
| 1024 | return;
|
| 1025 | } else if (!fence) {
|
| 1026 | wait->fence = dma_fence_get_stub();
|
| 1027 | } else {
|
| 1028 | wait->fence = fence;
|
| 1029 | }
|
| 1030 |
|
| 1031 | wake_up_process(wait->task);
|
| 1032 | list_del_init(&wait->node);
|
| 1033 | }
|
| 1034 |
|
| 1035 | static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
|
| 1036 | void __user *user_points,
|
| 1037 | uint32_t count,
|
| 1038 | uint32_t flags,
|
| 1039 | signed long timeout,
|
| 1040 | uint32_t *idx,
|
| 1041 | ktime_t *deadline)
|
| 1042 | {
|
| 1043 | struct syncobj_wait_entry *entries;
|
| 1044 | struct dma_fence *fence;
|
| 1045 | uint64_t *points;
|
| 1046 | uint32_t signaled_count, i;
|
| 1047 |
|
| 1048 | if (flags & (DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
|
| 1049 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)) {
|
| 1050 | might_sleep();
|
| 1051 | lockdep_assert_none_held_once();
|
| 1052 | }
|
| 1053 |
|
| 1054 | points = kmalloc_array(count, sizeof(*points), GFP_KERNEL);
|
| 1055 | if (points == NULL)
|
| 1056 | return -ENOMEM;
|
| 1057 |
|
| 1058 | if (!user_points) {
|
| 1059 | memset(points, 0, count * sizeof(uint64_t));
|
| 1060 |
|
| 1061 | } else if (copy_from_user(points, user_points,
|
| 1062 | sizeof(uint64_t) * count)) {
|
| 1063 | timeout = -EFAULT;
|
| 1064 | goto err_free_points;
|
| 1065 | }
|
| 1066 |
|
| 1067 | entries = kzalloc_objs(*entries, count);
|
| 1068 | if (!entries) {
|
| 1069 | timeout = -ENOMEM;
|
| 1070 | goto err_free_points;
|
| 1071 | }
|
| 1072 | |
| 1073 | * this up-front so that we can properly return -EINVAL if there is
|
| 1074 | * a syncobj with a missing fence and then never have the chance of
|
| 1075 | * returning -EINVAL again.
|
| 1076 |
|
| 1077 | signaled_count = 0;
|
| 1078 | for (i = 0; i < count; ++i) {
|
| 1079 | struct dma_fence *fence;
|
| 1080 |
|
| 1081 | entries[i].task = current;
|
| 1082 | entries[i].point = points[i];
|
| 1083 | fence = drm_syncobj_fence_get(syncobjs[i]);
|
| 1084 | if (!fence || dma_fence_chain_find_seqno(&fence, points[i])) {
|
| 1085 | dma_fence_put(fence);
|
| 1086 | if (flags & (DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
|
| 1087 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)) {
|
| 1088 | continue;
|
| 1089 | } else {
|
| 1090 | timeout = -EINVAL;
|
| 1091 | goto cleanup_entries;
|
| 1092 | }
|
| 1093 | }
|
| 1094 |
|
| 1095 | if (fence)
|
| 1096 | entries[i].fence = fence;
|
| 1097 | else
|
| 1098 | entries[i].fence = dma_fence_get_stub();
|
| 1099 |
|
| 1100 | if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) ||
|
| 1101 | dma_fence_is_signaled(entries[i].fence)) {
|
| 1102 | if (signaled_count == 0 && idx)
|
| 1103 | *idx = i;
|
| 1104 | signaled_count++;
|
| 1105 | }
|
| 1106 | }
|
| 1107 |
|
| 1108 | if (signaled_count == count ||
|
| 1109 | (signaled_count > 0 &&
|
| 1110 | !(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL)))
|
| 1111 | goto cleanup_entries;
|
| 1112 |
|
| 1113 | |
| 1114 | * that backends are not required to automatically report when a
|
| 1115 | * fence is signaled prior to fence->ops->enable_signaling() being
|
| 1116 | * called. So here if we fail to match signaled_count, we need to
|
| 1117 | * fallthough and try a 0 timeout wait!
|
| 1118 |
|
| 1119 |
|
| 1120 | if (flags & (DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
|
| 1121 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)) {
|
| 1122 | for (i = 0; i < count; ++i)
|
| 1123 | drm_syncobj_fence_add_wait(syncobjs[i], &entries[i]);
|
| 1124 | }
|
| 1125 |
|
| 1126 | if (deadline) {
|
| 1127 | for (i = 0; i < count; ++i) {
|
| 1128 | fence = entries[i].fence;
|
| 1129 | if (!fence)
|
| 1130 | continue;
|
| 1131 | dma_fence_set_deadline(fence, *deadline);
|
| 1132 | }
|
| 1133 | }
|
| 1134 |
|
| 1135 | do {
|
| 1136 | set_current_state(TASK_INTERRUPTIBLE);
|
| 1137 |
|
| 1138 | signaled_count = 0;
|
| 1139 | for (i = 0; i < count; ++i) {
|
| 1140 | fence = entries[i].fence;
|
| 1141 | if (!fence)
|
| 1142 | continue;
|
| 1143 |
|
| 1144 | if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) ||
|
| 1145 | dma_fence_is_signaled(fence) ||
|
| 1146 | (!entries[i].fence_cb.func &&
|
| 1147 | dma_fence_add_callback(fence,
|
| 1148 | &entries[i].fence_cb,
|
| 1149 | syncobj_wait_fence_func))) {
|
| 1150 |
|
| 1151 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL) {
|
| 1152 | signaled_count++;
|
| 1153 | } else {
|
| 1154 | if (idx)
|
| 1155 | *idx = i;
|
| 1156 | goto done_waiting;
|
| 1157 | }
|
| 1158 | }
|
| 1159 | }
|
| 1160 |
|
| 1161 | if (signaled_count == count)
|
| 1162 | goto done_waiting;
|
| 1163 |
|
| 1164 | if (timeout == 0) {
|
| 1165 | timeout = -ETIME;
|
| 1166 | goto done_waiting;
|
| 1167 | }
|
| 1168 |
|
| 1169 | if (signal_pending(current)) {
|
| 1170 | timeout = -ERESTARTSYS;
|
| 1171 | goto done_waiting;
|
| 1172 | }
|
| 1173 |
|
| 1174 | timeout = schedule_timeout(timeout);
|
| 1175 | } while (1);
|
| 1176 |
|
| 1177 | done_waiting:
|
| 1178 | __set_current_state(TASK_RUNNING);
|
| 1179 |
|
| 1180 | cleanup_entries:
|
| 1181 | for (i = 0; i < count; ++i) {
|
| 1182 | drm_syncobj_remove_wait(syncobjs[i], &entries[i]);
|
| 1183 | if (entries[i].fence_cb.func)
|
| 1184 | dma_fence_remove_callback(entries[i].fence,
|
| 1185 | &entries[i].fence_cb);
|
| 1186 | dma_fence_put(entries[i].fence);
|
| 1187 | }
|
| 1188 | kfree(entries);
|
| 1189 |
|
| 1190 | err_free_points:
|
| 1191 | kfree(points);
|
| 1192 |
|
| 1193 | return timeout;
|
| 1194 | }
|
| 1195 |
|
| 1196 | |
| 1197 | * drm_timeout_abs_to_jiffies - calculate jiffies timeout from absolute value
|
| 1198 | *
|
| 1199 | * @timeout_nsec: timeout nsec component in ns, 0 for poll
|
| 1200 | *
|
| 1201 | * Calculate the timeout in jiffies from an absolute time in sec/nsec.
|
| 1202 |
|
| 1203 | signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec)
|
| 1204 | {
|
| 1205 | ktime_t abs_timeout, now;
|
| 1206 | u64 timeout_ns, timeout_jiffies64;
|
| 1207 |
|
| 1208 |
|
| 1209 | if (timeout_nsec == 0)
|
| 1210 | return 0;
|
| 1211 |
|
| 1212 | abs_timeout = ns_to_ktime(timeout_nsec);
|
| 1213 | now = ktime_get();
|
| 1214 |
|
| 1215 | if (!ktime_after(abs_timeout, now))
|
| 1216 | return 0;
|
| 1217 |
|
| 1218 | timeout_ns = ktime_to_ns(ktime_sub(abs_timeout, now));
|
| 1219 |
|
| 1220 | timeout_jiffies64 = nsecs_to_jiffies64(timeout_ns);
|
| 1221 |
|
| 1222 | if (timeout_jiffies64 >= MAX_SCHEDULE_TIMEOUT - 1)
|
| 1223 | return MAX_SCHEDULE_TIMEOUT - 1;
|
| 1224 |
|
| 1225 | return timeout_jiffies64 + 1;
|
| 1226 | }
|
| 1227 | EXPORT_SYMBOL(drm_timeout_abs_to_jiffies);
|
| 1228 |
|
| 1229 | static int drm_syncobj_array_wait(struct drm_device *dev,
|
| 1230 | struct drm_file *file_private,
|
| 1231 | struct drm_syncobj_wait *wait,
|
| 1232 | struct drm_syncobj_timeline_wait *timeline_wait,
|
| 1233 | struct drm_syncobj **syncobjs, bool timeline,
|
| 1234 | ktime_t *deadline)
|
| 1235 | {
|
| 1236 | signed long timeout = 0;
|
| 1237 | uint32_t first = ~0;
|
| 1238 |
|
| 1239 | if (!timeline) {
|
| 1240 | timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);
|
| 1241 | timeout = drm_syncobj_array_wait_timeout(syncobjs,
|
| 1242 | NULL,
|
| 1243 | wait->count_handles,
|
| 1244 | wait->flags,
|
| 1245 | timeout, &first,
|
| 1246 | deadline);
|
| 1247 | if (timeout < 0)
|
| 1248 | return timeout;
|
| 1249 | wait->first_signaled = first;
|
| 1250 | } else {
|
| 1251 | timeout = drm_timeout_abs_to_jiffies(timeline_wait->timeout_nsec);
|
| 1252 | timeout = drm_syncobj_array_wait_timeout(syncobjs,
|
| 1253 | u64_to_user_ptr(timeline_wait->points),
|
| 1254 | timeline_wait->count_handles,
|
| 1255 | timeline_wait->flags,
|
| 1256 | timeout, &first,
|
| 1257 | deadline);
|
| 1258 | if (timeout < 0)
|
| 1259 | return timeout;
|
| 1260 | timeline_wait->first_signaled = first;
|
| 1261 | }
|
| 1262 | return 0;
|
| 1263 | }
|
| 1264 |
|
| 1265 | static int drm_syncobj_array_find(struct drm_file *file_private,
|
| 1266 | void __user *user_handles,
|
| 1267 | uint32_t count_handles,
|
| 1268 | struct drm_syncobj ***syncobjs_out)
|
| 1269 | {
|
| 1270 | uint32_t i, *handles;
|
| 1271 | struct drm_syncobj **syncobjs;
|
| 1272 | int ret;
|
| 1273 |
|
| 1274 | handles = kmalloc_array(count_handles, sizeof(*handles), GFP_KERNEL);
|
| 1275 | if (handles == NULL)
|
| 1276 | return -ENOMEM;
|
| 1277 |
|
| 1278 | if (copy_from_user(handles, user_handles,
|
| 1279 | sizeof(uint32_t) * count_handles)) {
|
| 1280 | ret = -EFAULT;
|
| 1281 | goto err_free_handles;
|
| 1282 | }
|
| 1283 |
|
| 1284 | syncobjs = kmalloc_objs(*syncobjs, count_handles);
|
| 1285 | if (syncobjs == NULL) {
|
| 1286 | ret = -ENOMEM;
|
| 1287 | goto err_free_handles;
|
| 1288 | }
|
| 1289 |
|
| 1290 | for (i = 0; i < count_handles; i++) {
|
| 1291 | syncobjs[i] = drm_syncobj_find(file_private, handles[i]);
|
| 1292 | if (!syncobjs[i]) {
|
| 1293 | ret = -ENOENT;
|
| 1294 | goto err_put_syncobjs;
|
| 1295 | }
|
| 1296 | }
|
| 1297 |
|
| 1298 | kfree(handles);
|
| 1299 | *syncobjs_out = syncobjs;
|
| 1300 | return 0;
|
| 1301 |
|
| 1302 | err_put_syncobjs:
|
| 1303 | while (i-- > 0)
|
| 1304 | drm_syncobj_put(syncobjs[i]);
|
| 1305 | kfree(syncobjs);
|
| 1306 | err_free_handles:
|
| 1307 | kfree(handles);
|
| 1308 |
|
| 1309 | return ret;
|
| 1310 | }
|
| 1311 |
|
| 1312 | static void drm_syncobj_array_free(struct drm_syncobj **syncobjs,
|
| 1313 | uint32_t count)
|
| 1314 | {
|
| 1315 | uint32_t i;
|
| 1316 |
|
| 1317 | for (i = 0; i < count; i++)
|
| 1318 | drm_syncobj_put(syncobjs[i]);
|
| 1319 | kfree(syncobjs);
|
| 1320 | }
|
| 1321 |
|
| 1322 | int
|
| 1323 | drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
|
| 1324 | struct drm_file *file_private)
|
| 1325 | {
|
| 1326 | struct drm_syncobj_wait *args = data;
|
| 1327 | struct drm_syncobj **syncobjs;
|
| 1328 | unsigned int possible_flags;
|
| 1329 | ktime_t t, *tp = NULL;
|
| 1330 | int ret = 0;
|
| 1331 |
|
| 1332 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
| 1333 | return -EOPNOTSUPP;
|
| 1334 |
|
| 1335 | possible_flags = DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL |
|
| 1336 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
|
| 1337 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE;
|
| 1338 |
|
| 1339 | if (args->flags & ~possible_flags)
|
| 1340 | return -EINVAL;
|
| 1341 |
|
| 1342 | if (args->count_handles == 0)
|
| 1343 | return 0;
|
| 1344 |
|
| 1345 | ret = drm_syncobj_array_find(file_private,
|
| 1346 | u64_to_user_ptr(args->handles),
|
| 1347 | args->count_handles,
|
| 1348 | &syncobjs);
|
| 1349 | if (ret < 0)
|
| 1350 | return ret;
|
| 1351 |
|
| 1352 | if (args->flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE) {
|
| 1353 | t = ns_to_ktime(args->deadline_nsec);
|
| 1354 | tp = &t;
|
| 1355 | }
|
| 1356 |
|
| 1357 | ret = drm_syncobj_array_wait(dev, file_private,
|
| 1358 | args, NULL, syncobjs, false, tp);
|
| 1359 |
|
| 1360 | drm_syncobj_array_free(syncobjs, args->count_handles);
|
| 1361 |
|
| 1362 | return ret;
|
| 1363 | }
|
| 1364 |
|
| 1365 | int
|
| 1366 | drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
|
| 1367 | struct drm_file *file_private)
|
| 1368 | {
|
| 1369 | struct drm_syncobj_timeline_wait *args = data;
|
| 1370 | struct drm_syncobj **syncobjs;
|
| 1371 | unsigned int possible_flags;
|
| 1372 | ktime_t t, *tp = NULL;
|
| 1373 | int ret = 0;
|
| 1374 |
|
| 1375 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
| 1376 | return -EOPNOTSUPP;
|
| 1377 |
|
| 1378 | possible_flags = DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL |
|
| 1379 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
|
| 1380 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE |
|
| 1381 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE;
|
| 1382 |
|
| 1383 | if (args->flags & ~possible_flags)
|
| 1384 | return -EINVAL;
|
| 1385 |
|
| 1386 | if (args->count_handles == 0)
|
| 1387 | return 0;
|
| 1388 |
|
| 1389 | ret = drm_syncobj_array_find(file_private,
|
| 1390 | u64_to_user_ptr(args->handles),
|
| 1391 | args->count_handles,
|
| 1392 | &syncobjs);
|
| 1393 | if (ret < 0)
|
| 1394 | return ret;
|
| 1395 |
|
| 1396 | if (args->flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_DEADLINE) {
|
| 1397 | t = ns_to_ktime(args->deadline_nsec);
|
| 1398 | tp = &t;
|
| 1399 | }
|
| 1400 |
|
| 1401 | ret = drm_syncobj_array_wait(dev, file_private,
|
| 1402 | NULL, args, syncobjs, true, tp);
|
| 1403 |
|
| 1404 | drm_syncobj_array_free(syncobjs, args->count_handles);
|
| 1405 |
|
| 1406 | return ret;
|
| 1407 | }
|
| 1408 |
|
| 1409 | static void syncobj_eventfd_entry_fence_func(struct dma_fence *fence,
|
| 1410 | struct dma_fence_cb *cb)
|
| 1411 | {
|
| 1412 | struct syncobj_eventfd_entry *entry =
|
| 1413 | container_of(cb, struct syncobj_eventfd_entry, fence_cb);
|
| 1414 |
|
| 1415 | eventfd_signal(entry->ev_fd_ctx);
|
| 1416 | syncobj_eventfd_entry_free(entry);
|
| 1417 | }
|
| 1418 |
|
| 1419 | static void
|
| 1420 | syncobj_eventfd_entry_func(struct drm_syncobj *syncobj,
|
| 1421 | struct syncobj_eventfd_entry *entry)
|
| 1422 | {
|
| 1423 | int ret;
|
| 1424 | struct dma_fence *fence;
|
| 1425 |
|
| 1426 |
|
| 1427 | fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, 1));
|
| 1428 | if (!fence)
|
| 1429 | return;
|
| 1430 |
|
| 1431 | ret = dma_fence_chain_find_seqno(&fence, entry->point);
|
| 1432 | if (ret != 0) {
|
| 1433 |
|
| 1434 | dma_fence_put(fence);
|
| 1435 | return;
|
| 1436 | } else if (!fence) {
|
| 1437 | |
| 1438 | * to NULL, it implies that the given seqno is signaled and a
|
| 1439 | * later seqno has already been submitted. Assign a stub fence
|
| 1440 | * so that the eventfd still gets signaled below.
|
| 1441 |
|
| 1442 | fence = dma_fence_get_stub();
|
| 1443 | }
|
| 1444 |
|
| 1445 | list_del_init(&entry->node);
|
| 1446 | entry->fence = fence;
|
| 1447 |
|
| 1448 | if (entry->flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) {
|
| 1449 | eventfd_signal(entry->ev_fd_ctx);
|
| 1450 | syncobj_eventfd_entry_free(entry);
|
| 1451 | } else {
|
| 1452 | ret = dma_fence_add_callback(fence, &entry->fence_cb,
|
| 1453 | syncobj_eventfd_entry_fence_func);
|
| 1454 | if (ret == -ENOENT) {
|
| 1455 | eventfd_signal(entry->ev_fd_ctx);
|
| 1456 | syncobj_eventfd_entry_free(entry);
|
| 1457 | }
|
| 1458 | }
|
| 1459 | }
|
| 1460 |
|
| 1461 | int
|
| 1462 | drm_syncobj_eventfd_ioctl(struct drm_device *dev, void *data,
|
| 1463 | struct drm_file *file_private)
|
| 1464 | {
|
| 1465 | struct drm_syncobj_eventfd *args = data;
|
| 1466 | struct drm_syncobj *syncobj;
|
| 1467 | struct eventfd_ctx *ev_fd_ctx;
|
| 1468 | struct syncobj_eventfd_entry *entry;
|
| 1469 | int ret;
|
| 1470 |
|
| 1471 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
| 1472 | return -EOPNOTSUPP;
|
| 1473 |
|
| 1474 | if (args->flags & ~DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)
|
| 1475 | return -EINVAL;
|
| 1476 |
|
| 1477 | if (args->pad)
|
| 1478 | return -EINVAL;
|
| 1479 |
|
| 1480 | syncobj = drm_syncobj_find(file_private, args->handle);
|
| 1481 | if (!syncobj)
|
| 1482 | return -ENOENT;
|
| 1483 |
|
| 1484 | ev_fd_ctx = eventfd_ctx_fdget(args->fd);
|
| 1485 | if (IS_ERR(ev_fd_ctx)) {
|
| 1486 | ret = PTR_ERR(ev_fd_ctx);
|
| 1487 | goto err_fdget;
|
| 1488 | }
|
| 1489 |
|
| 1490 | entry = kzalloc_obj(*entry);
|
| 1491 | if (!entry) {
|
| 1492 | ret = -ENOMEM;
|
| 1493 | goto err_kzalloc;
|
| 1494 | }
|
| 1495 | entry->syncobj = syncobj;
|
| 1496 | entry->ev_fd_ctx = ev_fd_ctx;
|
| 1497 | entry->point = args->point;
|
| 1498 | entry->flags = args->flags;
|
| 1499 |
|
| 1500 | drm_syncobj_add_eventfd(syncobj, entry);
|
| 1501 | drm_syncobj_put(syncobj);
|
| 1502 |
|
| 1503 | return 0;
|
| 1504 |
|
| 1505 | err_kzalloc:
|
| 1506 | eventfd_ctx_put(ev_fd_ctx);
|
| 1507 | err_fdget:
|
| 1508 | drm_syncobj_put(syncobj);
|
| 1509 | return ret;
|
| 1510 | }
|
| 1511 |
|
| 1512 | int
|
| 1513 | drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
|
| 1514 | struct drm_file *file_private)
|
| 1515 | {
|
| 1516 | struct drm_syncobj_array *args = data;
|
| 1517 | struct drm_syncobj **syncobjs;
|
| 1518 | uint32_t i;
|
| 1519 | int ret;
|
| 1520 |
|
| 1521 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
| 1522 | return -EOPNOTSUPP;
|
| 1523 |
|
| 1524 | if (args->pad != 0)
|
| 1525 | return -EINVAL;
|
| 1526 |
|
| 1527 | if (args->count_handles == 0)
|
| 1528 | return -EINVAL;
|
| 1529 |
|
| 1530 | ret = drm_syncobj_array_find(file_private,
|
| 1531 | u64_to_user_ptr(args->handles),
|
| 1532 | args->count_handles,
|
| 1533 | &syncobjs);
|
| 1534 | if (ret < 0)
|
| 1535 | return ret;
|
| 1536 |
|
| 1537 | for (i = 0; i < args->count_handles; i++)
|
| 1538 | drm_syncobj_replace_fence(syncobjs[i], NULL);
|
| 1539 |
|
| 1540 | drm_syncobj_array_free(syncobjs, args->count_handles);
|
| 1541 |
|
| 1542 | return 0;
|
| 1543 | }
|
| 1544 |
|
| 1545 | int
|
| 1546 | drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
|
| 1547 | struct drm_file *file_private)
|
| 1548 | {
|
| 1549 | struct drm_syncobj_array *args = data;
|
| 1550 | struct drm_syncobj **syncobjs;
|
| 1551 | uint32_t i;
|
| 1552 | int ret;
|
| 1553 |
|
| 1554 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
|
| 1555 | return -EOPNOTSUPP;
|
| 1556 |
|
| 1557 | if (args->pad != 0)
|
| 1558 | return -EINVAL;
|
| 1559 |
|
| 1560 | if (args->count_handles == 0)
|
| 1561 | return -EINVAL;
|
| 1562 |
|
| 1563 | ret = drm_syncobj_array_find(file_private,
|
| 1564 | u64_to_user_ptr(args->handles),
|
| 1565 | args->count_handles,
|
| 1566 | &syncobjs);
|
| 1567 | if (ret < 0)
|
| 1568 | return ret;
|
| 1569 |
|
| 1570 | for (i = 0; i < args->count_handles; i++) {
|
| 1571 | ret = drm_syncobj_assign_null_handle(syncobjs[i]);
|
| 1572 | if (ret < 0)
|
| 1573 | break;
|
| 1574 | }
|
| 1575 |
|
| 1576 | drm_syncobj_array_free(syncobjs, args->count_handles);
|
| 1577 |
|
| 1578 | return ret;
|
| 1579 | }
|
| 1580 |
|
| 1581 | int
|
| 1582 | drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
|
| 1583 | struct drm_file *file_private)
|
| 1584 | {
|
| 1585 | struct drm_syncobj_timeline_array *args = data;
|
| 1586 | struct drm_syncobj **syncobjs;
|
| 1587 | struct dma_fence_chain **chains;
|
| 1588 | uint64_t *points;
|
| 1589 | uint32_t i, j;
|
| 1590 | int ret;
|
| 1591 |
|
| 1592 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
| 1593 | return -EOPNOTSUPP;
|
| 1594 |
|
| 1595 | if (args->flags != 0)
|
| 1596 | return -EINVAL;
|
| 1597 |
|
| 1598 | if (args->count_handles == 0)
|
| 1599 | return -EINVAL;
|
| 1600 |
|
| 1601 | ret = drm_syncobj_array_find(file_private,
|
| 1602 | u64_to_user_ptr(args->handles),
|
| 1603 | args->count_handles,
|
| 1604 | &syncobjs);
|
| 1605 | if (ret < 0)
|
| 1606 | return ret;
|
| 1607 |
|
| 1608 | points = kmalloc_array(args->count_handles, sizeof(*points),
|
| 1609 | GFP_KERNEL);
|
| 1610 | if (!points) {
|
| 1611 | ret = -ENOMEM;
|
| 1612 | goto out;
|
| 1613 | }
|
| 1614 | if (!u64_to_user_ptr(args->points)) {
|
| 1615 | memset(points, 0, args->count_handles * sizeof(uint64_t));
|
| 1616 | } else if (copy_from_user(points, u64_to_user_ptr(args->points),
|
| 1617 | sizeof(uint64_t) * args->count_handles)) {
|
| 1618 | ret = -EFAULT;
|
| 1619 | goto err_points;
|
| 1620 | }
|
| 1621 |
|
| 1622 | chains = kmalloc_objs(*chains, args->count_handles);
|
| 1623 | if (!chains) {
|
| 1624 | ret = -ENOMEM;
|
| 1625 | goto err_points;
|
| 1626 | }
|
| 1627 | for (i = 0; i < args->count_handles; i++) {
|
| 1628 | chains[i] = dma_fence_chain_alloc();
|
| 1629 | if (!chains[i]) {
|
| 1630 | for (j = 0; j < i; j++)
|
| 1631 | dma_fence_chain_free(chains[j]);
|
| 1632 | ret = -ENOMEM;
|
| 1633 | goto err_chains;
|
| 1634 | }
|
| 1635 | }
|
| 1636 |
|
| 1637 | for (i = 0; i < args->count_handles; i++) {
|
| 1638 | struct dma_fence *fence = dma_fence_get_stub();
|
| 1639 |
|
| 1640 | drm_syncobj_add_point(syncobjs[i], chains[i],
|
| 1641 | fence, points[i]);
|
| 1642 | dma_fence_put(fence);
|
| 1643 | }
|
| 1644 | err_chains:
|
| 1645 | kfree(chains);
|
| 1646 | err_points:
|
| 1647 | kfree(points);
|
| 1648 | out:
|
| 1649 | drm_syncobj_array_free(syncobjs, args->count_handles);
|
| 1650 |
|
| 1651 | return ret;
|
| 1652 | }
|
| 1653 |
|
| 1654 | int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
|
| 1655 | struct drm_file *file_private)
|
| 1656 | {
|
| 1657 | struct drm_syncobj_timeline_array *args = data;
|
| 1658 | struct drm_syncobj **syncobjs;
|
| 1659 | uint64_t __user *points = u64_to_user_ptr(args->points);
|
| 1660 | uint32_t i;
|
| 1661 | int ret;
|
| 1662 |
|
| 1663 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
|
| 1664 | return -EOPNOTSUPP;
|
| 1665 |
|
| 1666 | if (args->flags & ~DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED)
|
| 1667 | return -EINVAL;
|
| 1668 |
|
| 1669 | if (args->count_handles == 0)
|
| 1670 | return -EINVAL;
|
| 1671 |
|
| 1672 | ret = drm_syncobj_array_find(file_private,
|
| 1673 | u64_to_user_ptr(args->handles),
|
| 1674 | args->count_handles,
|
| 1675 | &syncobjs);
|
| 1676 | if (ret < 0)
|
| 1677 | return ret;
|
| 1678 |
|
| 1679 | for (i = 0; i < args->count_handles; i++) {
|
| 1680 | struct dma_fence_chain *chain;
|
| 1681 | struct dma_fence *fence;
|
| 1682 | uint64_t point;
|
| 1683 |
|
| 1684 | fence = drm_syncobj_fence_get(syncobjs[i]);
|
| 1685 | chain = to_dma_fence_chain(fence);
|
| 1686 | if (chain) {
|
| 1687 | struct dma_fence *iter, *last_signaled =
|
| 1688 | dma_fence_get(fence);
|
| 1689 |
|
| 1690 | if (args->flags &
|
| 1691 | DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) {
|
| 1692 | point = fence->seqno;
|
| 1693 | } else {
|
| 1694 | dma_fence_chain_for_each(iter, fence) {
|
| 1695 | if (iter->context != fence->context) {
|
| 1696 | dma_fence_put(iter);
|
| 1697 | |
| 1698 | * unorder points.
|
| 1699 | break;
|
| 1700 | }
|
| 1701 | dma_fence_put(last_signaled);
|
| 1702 | last_signaled = dma_fence_get(iter);
|
| 1703 | }
|
| 1704 | point = dma_fence_is_signaled(last_signaled) ?
|
| 1705 | last_signaled->seqno :
|
| 1706 | to_dma_fence_chain(last_signaled)->prev_seqno;
|
| 1707 | }
|
| 1708 | dma_fence_put(last_signaled);
|
| 1709 | } else {
|
| 1710 | point = 0;
|
| 1711 | }
|
| 1712 | dma_fence_put(fence);
|
| 1713 | ret = copy_to_user(&points[i], &point, sizeof(uint64_t));
|
| 1714 | ret = ret ? -EFAULT : 0;
|
| 1715 | if (ret)
|
| 1716 | break;
|
| 1717 | }
|
| 1718 | drm_syncobj_array_free(syncobjs, args->count_handles);
|
| 1719 |
|
| 1720 | return ret;
|
| 1721 | }
|