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