98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/*
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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 _UAPI_LINUX_SYNC_H
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#define _UAPI_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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* @fd2: file descriptor of second fence
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* @name: name of new fence
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* @fence: returns the fd of the new fence to userspace
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*/
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struct sync_merge_data {
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__s32 fd2; /* fd of second fence */
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char name[32]; /* name of new fence */
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__s32 fence; /* fd on newly created fence */
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};
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/**
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* struct sync_pt_info - detailed sync_pt information
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* @len: length of sync_pt_info including any driver_data
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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 sync_pt 0:active 1:signaled <0:error
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* @timestamp_ns: timestamp of status change in nanoseconds
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* @driver_data: any driver dependent data
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*/
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struct sync_pt_info {
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__u32 len;
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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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__u64 timestamp_ns;
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__u8 driver_data[0];
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};
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/**
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* struct sync_fence_info_data - data returned from fence info ioctl
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* @len: ioctl caller writes the size of the buffer its passing in.
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* ioctl returns length of sync_fence_data returned to userspace
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* including pt_info.
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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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* @pt_info: a sync_pt_info struct for every sync_pt in the fence
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*/
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struct sync_fence_info_data {
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__u32 len;
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char name[32];
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__s32 status;
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__u8 pt_info[0];
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};
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#define SYNC_IOC_MAGIC '>'
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/**
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* DOC: SYNC_IOC_WAIT - wait for a fence to signal
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*
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* pass timeout in milliseconds. Waits indefinitely timeout < 0.
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*/
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#define SYNC_IOC_WAIT _IOW(SYNC_IOC_MAGIC, 0, __s32)
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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, 1, struct sync_merge_data)
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/**
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* DOC: SYNC_IOC_FENCE_INFO - get detailed information on a fence
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*
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* Takes a struct sync_fence_info_data with extra space allocated for pt_info.
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* Caller should write the size of the buffer into len. On return, len is
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* updated to reflect the total size of the sync_fence_info_data including
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* pt_info.
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*
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* pt_info is a buffer containing sync_pt_infos for every sync_pt in the fence.
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* To iterate over the sync_pt_infos, use the sync_pt_info.len field.
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*/
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#define SYNC_IOC_FENCE_INFO _IOWR(SYNC_IOC_MAGIC, 2,\
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struct sync_fence_info_data)
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#endif /* _UAPI_LINUX_SYNC_H */
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