diff options
author | Erik Gilling <konkers@android.com> | 2012-03-15 17:45:50 -0700 |
---|---|---|
committer | Arve Hjønnevåg <arve@android.com> | 2013-04-29 14:42:50 -0700 |
commit | 2a9aa1c898b44f89c91c49169203a57388e5bfda (patch) | |
tree | df0c495908df5284aaa87901d212fea1c724be19 /include/linux/sync.h | |
parent | 3d9b46b1e4b29189ed3863c278831c04315f33c7 (diff) |
sync: add ioctl to get fence data
Change-Id: I71410aef7e03a52562f7cb15b993ac8441b1fa12
Signed-off-by: Erik Gilling <konkers@android.com>
Diffstat (limited to 'include/linux/sync.h')
-rw-r--r-- | include/linux/sync.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/include/linux/sync.h b/include/linux/sync.h index d64271bd7a3..4f199387146 100644 --- a/include/linux/sync.h +++ b/include/linux/sync.h @@ -43,6 +43,10 @@ struct sync_fence; * should not print a newline * @print_pt: print aditional debug information about sync_pt. * should not print a newline + * @fill_driver_data: write implmentation specific driver data to data. + * should return an error if there is not enough room + * as specified by size. This information is returned + * to userspace by SYNC_IOC_FENCE_INFO. */ struct sync_timeline_ops { const char *driver_name; @@ -68,6 +72,9 @@ struct sync_timeline_ops { /* optional */ void (*print_pt)(struct seq_file *s, struct sync_pt *sync_pt); + + /* optional */ + int (*fill_driver_data)(struct sync_pt *syncpt, void *data, int size); }; /** @@ -312,6 +319,42 @@ struct sync_merge_data { __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 implmenting 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 dependant 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 reutnred 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 '>' /** @@ -330,4 +373,18 @@ struct sync_merge_data { */ #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 itterate 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 /* _LINUX_SYNC_H */ |