1 /* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */ 2 /* 3 * Copyright (C) 2012 Google, Inc. 4 * 5 * This program is distributed in the hope that it will be useful, 6 * but WITHOUT ANY WARRANTY; without even the implied warranty of 7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 8 * GNU General Public License for more details. 9 * 10 */ 11 12 #ifndef _UAPI_LINUX_SYNC_H 13 #define _UAPI_LINUX_SYNC_H 14 15 #if defined(__linux__) 16 17 #include <linux/ioctl.h> 18 #include <linux/types.h> 19 20 #else /* One of the BSDs */ 21 22 #include <stdint.h> 23 #include <sys/types.h> 24 #include <sys/ioccom.h> 25 26 typedef int8_t __s8; 27 typedef uint8_t __u8; 28 typedef int16_t __s16; 29 typedef uint16_t __u16; 30 typedef int32_t __s32; 31 typedef uint32_t __u32; 32 typedef int64_t __s64; 33 typedef uint64_t __u64; 34 35 #endif 36 37 /** 38 * struct sync_merge_data - data passed to merge ioctl 39 * @name: name of new fence 40 * @fd2: file descriptor of second fence 41 * @fence: returns the fd of the new fence to userspace 42 * @flags: merge_data flags 43 * @pad: padding for 64-bit alignment, should always be zero 44 */ 45 struct sync_merge_data { 46 char name[32]; 47 __s32 fd2; 48 __s32 fence; 49 __u32 flags; 50 __u32 pad; 51 }; 52 53 /** 54 * struct sync_fence_info - detailed fence information 55 * @obj_name: name of parent sync_timeline 56 * @driver_name: name of driver implementing the parent 57 * @status: status of the fence 0:active 1:signaled <0:error 58 * @flags: fence_info flags 59 * @timestamp_ns: timestamp of status change in nanoseconds 60 */ 61 struct sync_fence_info { 62 char obj_name[32]; 63 char driver_name[32]; 64 __s32 status; 65 __u32 flags; 66 __u64 timestamp_ns; 67 }; 68 69 /** 70 * struct sync_file_info - data returned from fence info ioctl 71 * @name: name of fence 72 * @status: status of fence. 1: signaled 0:active <0:error 73 * @flags: sync_file_info flags 74 * @num_fences number of fences in the sync_file 75 * @pad: padding for 64-bit alignment, should always be zero 76 * @sync_fence_info: pointer to array of structs sync_fence_info with all 77 * fences in the sync_file 78 */ 79 struct sync_file_info { 80 char name[32]; 81 __s32 status; 82 __u32 flags; 83 __u32 num_fences; 84 __u32 pad; 85 86 __u64 sync_fence_info; 87 }; 88 89 #define SYNC_IOC_MAGIC '>' 90 91 /** 92 * Opcodes 0, 1 and 2 were burned during a API change to avoid users of the 93 * old API to get weird errors when trying to handling sync_files. The API 94 * change happened during the de-stage of the Sync Framework when there was 95 * no upstream users available. 96 */ 97 98 /** 99 * DOC: SYNC_IOC_MERGE - merge two fences 100 * 101 * Takes a struct sync_merge_data. Creates a new fence containing copies of 102 * the sync_pts in both the calling fd and sync_merge_data.fd2. Returns the 103 * new fence's fd in sync_merge_data.fence 104 */ 105 #define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data) 106 107 /** 108 * DOC: SYNC_IOC_FILE_INFO - get detailed information on a sync_file 109 * 110 * Takes a struct sync_file_info. If num_fences is 0, the field is updated 111 * with the actual number of fences. If num_fences is > 0, the system will 112 * use the pointer provided on sync_fence_info to return up to num_fences of 113 * struct sync_fence_info, with detailed fence information. 114 */ 115 #define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info) 116 117 #endif /* _UAPI_LINUX_SYNC_H */ 118