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#ifndef ONESHOT_SYNC_H
#define ONESHOT_SYNC_H
/**
* DOC: Oneshot sync Userspace API
*
* Opening a file descriptor from /dev/oneshot_sync creates a * sync timeline
* for userspace signaled fences. Userspace may create new fences from a
* /dev/oneshot_sync file descriptor and then signal them by passing the fence
* file descriptor in an ioctl() call on the fd used to create the fence.
* Unlike most sync timelines, there is no ordering on a oneshot timeline.
* Each fence may be signaled in any order without affecting the state of other
* fences on the timeline.
*/
#define ONESHOT_SYNC_IOC_MAGIC '1'
/**
* struct oneshot_sync_create_fence - argument to create fence ioctl
* @name: name of the new fence, to aid debugging.
* @fence_fd: returned sync_fence file descriptor
*/
struct oneshot_sync_create_fence {
char name[32];
int fence_fd;
};
/**
* DOC: ONESHOT_SYNC_IOC_CREATE_FENCE - create a userspace signaled fence
*
* Create a fence that may be signaled by userspace by calling
* ONESHOT_SYNC_IOC_SIGNAL_FENCE. There are no order dependencies between
* these fences, but otherwise they behave like normal sync fences.
* Argument is struct oneshot_sync_create_fence.
*/
#define ONESHOT_SYNC_IOC_CREATE_FENCE _IOWR(ONESHOT_SYNC_IOC_MAGIC, 1,\
struct oneshot_sync_create_fence)
/**
* DOC: ONESHOT_SYNC_IOC_SIGNAL_FENCE - signal a fence
*
* Signal a fence that was created by a ONESHOT_SYNC_IOC_CREATE_FENCE
* call on the same file descriptor. This allows a fence to be shared
* to other processes but only signaled by the process owning the fd
* used to create the fence. Argument is the fence file descriptor.
*/
#define ONESHOT_SYNC_IOC_SIGNAL_FENCE _IOWR(ONESHOT_SYNC_IOC_MAGIC, 2,\
int)
#endif
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