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823d1bc108
The ioctl name and description on the documentation block don't match the ioctl being defined. This was probably overlooked while renaming the ioctls during the sync file destaging. This patch provides a more accurate description of what the ioctl actually does. Signed-off-by: Emilio López <emilio.lopez@collabora.co.uk> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Link: http://patchwork.freedesktop.org/patch/msgid/20160919042120.6280-1-emilio.lopez@collabora.co.uk
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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* @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 /* _UAPI_LINUX_SYNC_H */
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