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sync_file.h
/* 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 */
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