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