1 /* 2 * Copyright (C) 2012 Google, Inc. 3 * 4 * This program is distributed in the hope that it will be useful, 5 * but WITHOUT ANY WARRANTY; without even the implied warranty of 6 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 7 * GNU General Public License for more details. 8 * 9 */ 10 11 #ifndef _UAPI_LINUX_SYNC_H 12 #define _UAPI_LINUX_SYNC_H 13 14 #include <linux/ioctl.h> 15 #include <linux/types.h> 16 17 /** 18 * struct sync_merge_data - data passed to merge ioctl 19 * @fd2: file descriptor of second fence 20 * @name: name of new fence 21 * @fence: returns the fd of the new fence to userspace 22 */ 23 struct sync_merge_data { 24 __s32 fd2; /* fd of second fence */ 25 char name[32]; /* name of new fence */ 26 __s32 fence; /* fd on newly created fence */ 27 }; 28 29 /** 30 * struct sync_pt_info - detailed sync_pt information 31 * @len: length of sync_pt_info including any driver_data 32 * @obj_name: name of parent sync_timeline 33 * @driver_name: name of driver implmenting the parent 34 * @status: status of the sync_pt 0:active 1:signaled <0:error 35 * @timestamp_ns: timestamp of status change in nanoseconds 36 * @driver_data: any driver dependant data 37 */ 38 struct sync_pt_info { 39 __u32 len; 40 char obj_name[32]; 41 char driver_name[32]; 42 __s32 status; 43 __u64 timestamp_ns; 44 45 __u8 driver_data[0]; 46 }; 47 48 /** 49 * struct sync_fence_info_data - data returned from fence info ioctl 50 * @len: ioctl caller writes the size of the buffer its passing in. 51 * ioctl returns length of sync_fence_data reutnred to userspace 52 * including pt_info. 53 * @name: name of fence 54 * @status: status of fence. 1: signaled 0:active <0:error 55 * @pt_info: a sync_pt_info struct for every sync_pt in the fence 56 */ 57 struct sync_fence_info_data { 58 __u32 len; 59 char name[32]; 60 __s32 status; 61 62 __u8 pt_info[0]; 63 }; 64 65 #define SYNC_IOC_MAGIC '>' 66 67 /** 68 * DOC: SYNC_IOC_WAIT - wait for a fence to signal 69 * 70 * pass timeout in milliseconds. Waits indefinitely timeout < 0. 71 */ 72 #define SYNC_IOC_WAIT _IOW(SYNC_IOC_MAGIC, 0, __s32) 73 74 /** 75 * DOC: SYNC_IOC_MERGE - merge two fences 76 * 77 * Takes a struct sync_merge_data. Creates a new fence containing copies of 78 * the sync_pts in both the calling fd and sync_merge_data.fd2. Returns the 79 * new fence's fd in sync_merge_data.fence 80 */ 81 #define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 1, struct sync_merge_data) 82 83 /** 84 * DOC: SYNC_IOC_FENCE_INFO - get detailed information on a fence 85 * 86 * Takes a struct sync_fence_info_data with extra space allocated for pt_info. 87 * Caller should write the size of the buffer into len. On return, len is 88 * updated to reflect the total size of the sync_fence_info_data including 89 * pt_info. 90 * 91 * pt_info is a buffer containing sync_pt_infos for every sync_pt in the fence. 92 * To itterate over the sync_pt_infos, use the sync_pt_info.len field. 93 */ 94 #define SYNC_IOC_FENCE_INFO _IOWR(SYNC_IOC_MAGIC, 2,\ 95 struct sync_fence_info_data) 96 97 #endif /* _UAPI_LINUX_SYNC_H */ 98
