Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / android / uapi / sync.h

diff --git a/kernel/drivers/staging/android/uapi/sync.h b/kernel/drivers/staging/android/uapi/sync.h
new file mode 100644 (file)
index 0000000..e964c75
--- /dev/null
+++ b/kernel/drivers/staging/android/uapi/sync.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _UAPI_LINUX_SYNC_H
+#define _UAPI_LINUX_SYNC_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+/**
+ * struct sync_merge_data - data passed to merge ioctl
+ * @fd2:       file descriptor of second fence
+ * @name:      name of new fence
+ * @fence:     returns the fd of the new fence to userspace
+ */
+struct sync_merge_data {
+       __s32   fd2; /* fd of second fence */
+       char    name[32]; /* name of new fence */
+       __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 implementing 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 dependent 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 returned 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         '>'
+
+/**
+ * DOC: SYNC_IOC_WAIT - wait for a fence to signal
+ *
+ * pass timeout in milliseconds.  Waits indefinitely timeout < 0.
+ */
+#define SYNC_IOC_WAIT          _IOW(SYNC_IOC_MAGIC, 0, __s32)
+
+/**
+ * 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
+ */
+#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 iterate 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 /* _UAPI_LINUX_SYNC_H */