1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/gpu/arm/utgard/common/mali_timeline_fence_wait.h b/drivers/gpu/arm/utgard/common/mali_timeline_fence_wait.h
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+++ b/drivers/gpu/arm/utgard/common/mali_timeline_fence_wait.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2013, 2015 ARM Limited. All rights reserved.
+ * 
+ * This program is free software and is provided to you under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
+ * 
+ * A copy of the licence is included with the program, and can also be obtained from Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+/**
+ * @file mali_timeline_fence_wait.h
+ *
+ * This file contains functions used to wait until a Timeline fence is signaled.
+ */
+
+#ifndef __MALI_TIMELINE_FENCE_WAIT_H__
+#define __MALI_TIMELINE_FENCE_WAIT_H__
+
+#include "mali_osk.h"
+#include "mali_timeline.h"
+
+/**
+ * If used as the timeout argument in @ref mali_timeline_fence_wait, a timer is not used and the
+ * function only returns when the fence is signaled.
+ */
+#define MALI_TIMELINE_FENCE_WAIT_TIMEOUT_NEVER ((u32) -1)
+
+/**
+ * If used as the timeout argument in @ref mali_timeline_fence_wait, the function will return
+ * immediately with the current state of the fence.
+ */
+#define MALI_TIMELINE_FENCE_WAIT_TIMEOUT_IMMEDIATELY 0
+
+/**
+ * Fence wait tracker.
+ *
+ * The fence wait tracker is added to the Timeline system with the fence we are waiting on as a
+ * dependency.  We will then perform a blocking wait, possibly with a timeout, until the tracker is
+ * activated, which happens when the fence is signaled.
+ */
+struct mali_timeline_fence_wait_tracker {
+	mali_bool activated;                  /**< MALI_TRUE if the tracker has been activated, MALI_FALSE if not. */
+	_mali_osk_atomic_t refcount;          /**< Reference count. */
+	struct mali_timeline_system *system;  /**< Timeline system. */
+	struct mali_timeline_tracker tracker; /**< Timeline tracker. */
+};
+
+/**
+ * Wait for a fence to be signaled, or timeout is reached.
+ *
+ * @param system Timeline system.
+ * @param fence Fence to wait on.
+ * @param timeout Timeout in ms, or MALI_TIMELINE_FENCE_WAIT_TIMEOUT_NEVER or
+ * MALI_TIMELINE_FENCE_WAIT_TIMEOUT_IMMEDIATELY.
+ * @return MALI_TRUE if signaled, MALI_FALSE if timed out.
+ */
+mali_bool mali_timeline_fence_wait(struct mali_timeline_system *system, struct mali_timeline_fence *fence, u32 timeout);
+
+/**
+ * Used by the Timeline system to activate a fence wait tracker.
+ *
+ * @param fence_wait_tracker Fence waiter tracker.
+ */
+void mali_timeline_fence_wait_activate(struct mali_timeline_fence_wait_tracker *fence_wait_tracker);
+
+#endif /* __MALI_TIMELINE_FENCE_WAIT_H__ */