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f4a3e6b49a
Add support for pollfds, which are essentially file descriptors with SYNC_FILE polling characteristics but that can have new fences assigned to after the previous expires. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Change-Id: I6471720089041d3cc72dfaf2d1de221d80d28c27 Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2806032 Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
97 lines
1.8 KiB
C
97 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/* Copyright (c) 2022 NVIDIA Corporation */
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#ifndef _UAPI__LINUX_HOST1X_FENCE_H
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#define _UAPI__LINUX_HOST1X_FENCE_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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struct host1x_create_fence {
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/**
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* @id: [in]
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*
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* ID of the syncpoint to create a fence for.
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*/
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__u32 id;
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/**
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* @threshold: [in]
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*
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* When the syncpoint reaches this value, the fence will be signaled.
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* The syncpoint is considered to have reached the threshold when the
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* following condition is true:
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*
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* ((value - threshold) & 0x80000000U) == 0U
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*
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*/
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__u32 threshold;
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/**
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* @fence_fd: [out]
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*
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* New sync_file file descriptor containing the created fence.
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*/
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__s32 fence_fd;
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__u32 reserved[1];
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};
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struct host1x_fence_extract_fence {
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__u32 id;
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__u32 threshold;
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};
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struct host1x_fence_extract {
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/**
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* @fence_fd: [in]
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*
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* sync_file file descriptor
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*/
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__s32 fence_fd;
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/**
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* @num_fences: [in,out]
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*
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* In: size of the `fences_ptr` array counted in elements.
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* Out: required size of the `fences_ptr` array counted in elements.
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*/
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__u32 num_fences;
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/**
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* @fences_ptr: [in]
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*
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* Pointer to array of `struct host1x_fence_extract_fence`.
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*/
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__u64 fences_ptr;
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__u32 reserved[2];
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};
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struct host1x_create_pollfd {
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__s32 fd;
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__u32 reserved;
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};
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struct host1x_trigger_pollfd {
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__s32 fd;
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__u32 id;
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__u32 threshold;
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__u32 reserved;
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};
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#define HOST1X_IOCTL_CREATE_FENCE _IOWR('X', 0x02, struct host1x_create_fence)
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#define HOST1X_IOCTL_FENCE_EXTRACT _IOWR('X', 0x05, struct host1x_fence_extract)
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#define HOST1X_IOCTL_CREATE_POLLFD _IOWR('X', 0x10, struct host1x_create_pollfd)
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#define HOST1X_IOCTL_TRIGGER_POLLFD _IOWR('X', 0x11, struct host1x_trigger_pollfd)
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#if defined(__cplusplus)
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}
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#endif
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#endif
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