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 _LINUX_SYNC_H 13 #define _LINUX_SYNC_H 14 15 #include <linux/ioctl.h> 16 #include <linux/types.h> 17 18 /** 19 * struct sync_merge_data - data passed to merge ioctl 20 * @name: name of new fence 21 * @fd2: file descriptor of second fence 22 * @fence: returns the fd of the new fence to userspace 23 * @flags: merge_data flags 24 * @pad: padding for 64-bit alignment, should always be zero 25 */ 26 struct sync_merge_data { 27 char name[32]; 28 __s32 fd2; 29 __s32 fence; 30 __u32 flags; 31 __u32 pad; 32 }; 33 34 /** 35 * struct sync_fence_info - detailed fence information 36 * @obj_name: name of parent sync_timeline 37 * @driver_name: name of driver implementing the parent 38 * @status: status of the fence 0:active 1:signaled <0:error 39 * @flags: fence_info flags 40 * @timestamp_ns: timestamp of status change in nanoseconds 41 */ 42 struct sync_fence_info { 43 char obj_name[32]; 44 char driver_name[32]; 45 __s32 status; 46 __u32 flags; 47 __u64 timestamp_ns; 48 }; 49 50 /** 51 * struct sync_file_info - data returned from fence info ioctl 52 * @name: name of fence 53 * @status: status of fence. 1: signaled 0:active <0:error 54 * @flags: sync_file_info flags 55 * @num_fences number of fences in the sync_file 56 * @pad: padding for 64-bit alignment, should always be zero 57 * @sync_fence_info: pointer to array of structs sync_fence_info with all 58 * fences in the sync_file 59 */ 60 struct sync_file_info { 61 char name[32]; 62 __s32 status; 63 __u32 flags; 64 __u32 num_fences; 65 __u32 pad; 66 67 __u64 sync_fence_info; 68 }; 69 70 #define SYNC_IOC_MAGIC '>' 71 72 /** 73 * Opcodes 0, 1 and 2 were burned during a API change to avoid users of the 74 * old API to get weird errors when trying to handling sync_files. The API 75 * change happened during the de-stage of the Sync Framework when there was 76 * no upstream users available. 77 */ 78 79 /** 80 * DOC: SYNC_IOC_MERGE - merge two fences 81 * 82 * Takes a struct sync_merge_data. Creates a new fence containing copies of 83 * the sync_pts in both the calling fd and sync_merge_data.fd2. Returns the 84 * new fence's fd in sync_merge_data.fence 85 */ 86 #define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data) 87 88 /** 89 * DOC: SYNC_IOC_FILE_INFO - get detailed information on a sync_file 90 * 91 * Takes a struct sync_file_info. If num_fences is 0, the field is updated 92 * with the actual number of fences. If num_fences is > 0, the system will 93 * use the pointer provided on sync_fence_info to return up to num_fences of 94 * struct sync_fence_info, with detailed fence information. 95 */ 96 #define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info) 97 98 #endif /* _LINUX_SYNC_H */ 99