merge in jb-mr1-release history after reset to jb-mr1-dev
diff --git a/original/linux/sync.h b/original/linux/sync.h
index 4f19938..75ed5f1 100644
--- a/original/linux/sync.h
+++ b/original/linux/sync.h
@@ -16,6 +16,7 @@
#include <linux/types.h>
#ifdef __KERNEL__
+#include <linux/kref.h>
#include <linux/ktime.h>
#include <linux/list.h>
#include <linux/spinlock.h>
@@ -79,6 +80,7 @@
/**
* struct sync_timeline - sync object
+ * @kref: reference count on fence.
* @ops: ops that define the implementaiton of the sync_timeline
* @name: name of the sync_timeline. Useful for debugging
* @destoryed: set when sync_timeline is destroyed
@@ -89,6 +91,7 @@
* @sync_timeline_list: membership in global sync_timeline_list
*/
struct sync_timeline {
+ struct kref kref;
const struct sync_timeline_ops *ops;
char name[32];
@@ -109,6 +112,7 @@
* @parent: sync_timeline to which this sync_pt belongs
* @child_list: membership in sync_timeline.child_list_head
* @active_list: membership in sync_timeline.active_list_head
+ * @signaled_list: membership in temorary signaled_list on stack
* @fence: sync_fence to which the sync_pt belongs
* @pt_list: membership in sync_fence.pt_list_head
* @status: 1: signaled, 0:active, <0: error
@@ -120,6 +124,7 @@
struct list_head child_list;
struct list_head active_list;
+ struct list_head signaled_list;
struct sync_fence *fence;
struct list_head pt_list;
@@ -133,6 +138,7 @@
/**
* struct sync_fence - sync fence
* @file: file representing this fence
+ * @kref: referenace count on fence.
* @name: name of sync_fence. Useful for debugging
* @pt_list_head: list of sync_pts in ths fence. immutable once fence
* is created
@@ -145,6 +151,7 @@
*/
struct sync_fence {
struct file *file;
+ struct kref kref;
char name[32];
/* this list is immutable once the fence is created */
@@ -159,6 +166,10 @@
struct list_head sync_fence_list;
};
+struct sync_fence_waiter;
+typedef void (*sync_callback_t)(struct sync_fence *fence,
+ struct sync_fence_waiter *waiter);
+
/**
* struct sync_fence_waiter - metadata for asynchronous waiter on a fence
* @waiter_list: membership in sync_fence.waiter_list_head
@@ -168,10 +179,15 @@
struct sync_fence_waiter {
struct list_head waiter_list;
- void (*callback)(struct sync_fence *fence, void *data);
- void *callback_data;
+ sync_callback_t callback;
};
+static inline void sync_fence_waiter_init(struct sync_fence_waiter *waiter,
+ sync_callback_t callback)
+{
+ waiter->callback = callback;
+}
+
/*
* API for sync_timeline implementers
*/
@@ -284,24 +300,37 @@
/**
* sync_fence_wait_async() - registers and async wait on the fence
* @fence: fence to wait on
- * @callback: callback
- * @callback_data data to pass to the callback
+ * @waiter: waiter callback struck
*
* Returns 1 if @fence has already signaled.
*
- * Registers a callback to be called when @fence signals or has an error
+ * Registers a callback to be called when @fence signals or has an error.
+ * @waiter should be initialized with sync_fence_waiter_init().
*/
int sync_fence_wait_async(struct sync_fence *fence,
- void (*callback)(struct sync_fence *, void *data),
- void *callback_data);
+ struct sync_fence_waiter *waiter);
+
+/**
+ * sync_fence_cancel_async() - cancels an async wait
+ * @fence: fence to wait on
+ * @waiter: waiter callback struck
+ *
+ * returns 0 if waiter was removed from fence's async waiter list.
+ * returns -ENOENT if waiter was not found on fence's async waiter list.
+ *
+ * Cancels a previously registered async wait. Will fail gracefully if
+ * @waiter was never registered or if @fence has already signaled @waiter.
+ */
+int sync_fence_cancel_async(struct sync_fence *fence,
+ struct sync_fence_waiter *waiter);
/**
* sync_fence_wait() - wait on fence
* @fence: fence to wait on
* @tiemout: timeout in ms
*
- * Wait for @fence to be signaled or have an error. Waits indefintly
- * if @timeout = 0
+ * Wait for @fence to be signaled or have an error. Waits indefinitely
+ * if @timeout < 0
*/
int sync_fence_wait(struct sync_fence *fence, long timeout);
@@ -360,9 +389,9 @@
/**
* DOC: SYNC_IOC_WAIT - wait for a fence to signal
*
- * pass timeout in milliseconds.
+ * pass timeout in milliseconds. Waits indefinitely timeout < 0.
*/
-#define SYNC_IOC_WAIT _IOW(SYNC_IOC_MAGIC, 0, __u32)
+#define SYNC_IOC_WAIT _IOW(SYNC_IOC_MAGIC, 0, __s32)
/**
* DOC: SYNC_IOC_MERGE - merge two fences