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99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
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/*
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* Copyright (C) 2012 Google, Inc.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _LINUX_SYNC_H
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#define _LINUX_SYNC_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/**
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* struct sync_merge_data - data passed to merge ioctl
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* @name: name of new fence
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* @fd2: file descriptor of second fence
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* @fence: returns the fd of the new fence to userspace
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* @flags: merge_data flags
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* @pad: padding for 64-bit alignment, should always be zero
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*/
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struct sync_merge_data {
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char name[32];
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__s32 fd2;
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__s32 fence;
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__u32 flags;
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__u32 pad;
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};
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/**
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* struct sync_fence_info - detailed fence information
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* @obj_name: name of parent sync_timeline
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* @driver_name: name of driver implementing the parent
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* @status: status of the fence 0:active 1:signaled <0:error
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* @flags: fence_info flags
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* @timestamp_ns: timestamp of status change in nanoseconds
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*/
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struct sync_fence_info {
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char obj_name[32];
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char driver_name[32];
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__s32 status;
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__u32 flags;
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__u64 timestamp_ns;
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};
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/**
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* struct sync_file_info - data returned from fence info ioctl
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* @name: name of fence
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* @status: status of fence. 1: signaled 0:active <0:error
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* @flags: sync_file_info flags
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* @num_fences number of fences in the sync_file
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* @pad: padding for 64-bit alignment, should always be zero
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* @sync_fence_info: pointer to array of structs sync_fence_info with all
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* fences in the sync_file
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*/
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struct sync_file_info {
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char name[32];
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__s32 status;
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__u32 flags;
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__u32 num_fences;
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__u32 pad;
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__u64 sync_fence_info;
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};
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#define SYNC_IOC_MAGIC '>'
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/**
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* Opcodes 0, 1 and 2 were burned during a API change to avoid users of the
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* old API to get weird errors when trying to handling sync_files. The API
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* change happened during the de-stage of the Sync Framework when there was
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* no upstream users available.
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*/
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/**
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* DOC: SYNC_IOC_MERGE - merge two fences
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*
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* Takes a struct sync_merge_data. Creates a new fence containing copies of
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* the sync_pts in both the calling fd and sync_merge_data.fd2. Returns the
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* new fence's fd in sync_merge_data.fence
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*/
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#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
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/**
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* DOC: SYNC_IOC_FILE_INFO - get detailed information on a sync_file
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*
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* Takes a struct sync_file_info. If num_fences is 0, the field is updated
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* with the actual number of fences. If num_fences is > 0, the system will
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* use the pointer provided on sync_fence_info to return up to num_fences of
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* struct sync_fence_info, with detailed fence information.
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*/
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#define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info)
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#endif /* _LINUX_SYNC_H */
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