| Chris Wilson | 4cd4cc4 | 2017-12-19 15:00:03 +0000 | [diff] [blame] | 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 */ |