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libsync: add new Sync kernel API am: 6786575d42 

am: f951c0d87a

Change-Id: I6410ddc83d7783106e0816d3b40a873ccb26a334
This commit is contained in:
Gustavo Padovan 2017-01-19 00:44:03 +00:00 committed by android-build-merger
parent ad74f8fe01 f951c0d87a
commit f08b438edd
1 changed files with 60 additions and 0 deletions
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60
libsync/include/sync/sync.h
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@ -90,6 +90,66 @@ struct sync_pt_info {
#define SYNC_IOC_LEGACY_FENCE_INFO _IOWR(SYNC_IOC_MAGIC, 2,\
struct sync_fence_info_data)
struct sync_merge_data {
char name[32];
int32_t fd2;
int32_t fence;
uint32_t flags;
uint32_t pad;
};
struct sync_file_info {
char name[32];
int32_t status;
uint32_t flags;
uint32_t num_fences;
uint32_t pad;
uint64_t sync_fence_info;
};
struct sync_fence_info {
char obj_name[32];
char driver_name[32];
int32_t status;
uint32_t flags;
uint64_t timestamp_ns;
};
/**
* Mainline API:
*
* Opcodes 0, 1 and 2 were burned during a API change to avoid users of the
* old API to get weird errors when trying to handling sync_files. The API
* change happened during the de-stage of the Sync Framework when there was
* no upstream users available.
*/
/**
* DOC: SYNC_IOC_MERGE - merge two fences
*
* Takes a struct sync_merge_data. Creates a new fence containing copies of
* the sync_pts in both the calling fd and sync_merge_data.fd2. Returns the
* new fence's fd in sync_merge_data.fence
*
* This is the new version of the Sync API after the de-stage that happened
* on Linux kernel 4.7.
*/
#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
/**
* DOC: SYNC_IOC_FILE_INFO - get detailed information on a sync_file
*
* Takes a struct sync_file_info. If num_fences is 0, the field is updated
* with the actual number of fences. If num_fences is > 0, the system will
* use the pointer provided on sync_fence_info to return up to num_fences of
* struct sync_fence_info, with detailed fence information.
*
* This is the new version of the Sync API after the de-stage that happened
* on Linux kernel 4.7.
*/
#define SYNC_IOC_FILE_INFO _IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info)
/* timeout in msecs */
int sync_wait(int fd, int timeout);
int sync_merge(const char *name, int fd1, int fd2);