1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/gpu/arm/utgard/common/mali_spinlock_reentrant.h b/drivers/gpu/arm/utgard/common/mali_spinlock_reentrant.h
new file mode 100644
index 000000000000..6a62df850b2f
--- /dev/null
+++ b/drivers/gpu/arm/utgard/common/mali_spinlock_reentrant.h
@@ -0,0 +1,70 @@
+/*
+ * 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.
+ */
+
+#ifndef __MALI_SPINLOCK_REENTRANT_H__
+#define __MALI_SPINLOCK_REENTRANT_H__
+
+#include "mali_osk.h"
+#include "mali_kernel_common.h"
+
+/**
+ * Reentrant spinlock.
+ */
+struct mali_spinlock_reentrant {
+	_mali_osk_spinlock_irq_t *lock;
+	u32               owner;
+	u32               counter;
+};
+
+/**
+ * Create a new reentrant spinlock.
+ *
+ * @param lock_order Lock order.
+ * @return New reentrant spinlock.
+ */
+struct mali_spinlock_reentrant *mali_spinlock_reentrant_init(_mali_osk_lock_order_t lock_order);
+
+/**
+ * Terminate reentrant spinlock and free any associated resources.
+ *
+ * @param spinlock Reentrant spinlock to terminate.
+ */
+void mali_spinlock_reentrant_term(struct mali_spinlock_reentrant *spinlock);
+
+/**
+ * Wait for reentrant spinlock to be signaled.
+ *
+ * @param spinlock Reentrant spinlock.
+ * @param tid Thread ID.
+ */
+void mali_spinlock_reentrant_wait(struct mali_spinlock_reentrant *spinlock, u32 tid);
+
+/**
+ * Signal reentrant spinlock.
+ *
+ * @param spinlock Reentrant spinlock.
+ * @param tid Thread ID.
+ */
+void mali_spinlock_reentrant_signal(struct mali_spinlock_reentrant *spinlock, u32 tid);
+
+/**
+ * Check if thread is holding reentrant spinlock.
+ *
+ * @param spinlock Reentrant spinlock.
+ * @param tid Thread ID.
+ * @return MALI_TRUE if thread is holding spinlock, MALI_FALSE if not.
+ */
+MALI_STATIC_INLINE mali_bool mali_spinlock_reentrant_is_held(struct mali_spinlock_reentrant *spinlock, u32 tid)
+{
+	MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
+	return (tid == spinlock->owner && 0 < spinlock->counter);
+}
+
+#endif /* __MALI_SPINLOCK_REENTRANT_H__ */