1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/gpu/arm/utgard/common/mali_spinlock_reentrant.c b/drivers/gpu/arm/utgard/common/mali_spinlock_reentrant.c
new file mode 100644
index 000000000000..178abaf43ba1
--- /dev/null
+++ b/drivers/gpu/arm/utgard/common/mali_spinlock_reentrant.c
@@ -0,0 +1,77 @@
+/*
+ * 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.
+ */
+
+#include "mali_spinlock_reentrant.h"
+
+#include "mali_osk.h"
+#include "mali_kernel_common.h"
+
+struct mali_spinlock_reentrant *mali_spinlock_reentrant_init(_mali_osk_lock_order_t lock_order)
+{
+	struct mali_spinlock_reentrant *spinlock;
+
+	spinlock = _mali_osk_calloc(1, sizeof(struct mali_spinlock_reentrant));
+	if (NULL == spinlock) {
+		return NULL;
+	}
+
+	spinlock->lock = _mali_osk_spinlock_irq_init(_MALI_OSK_LOCKFLAG_ORDERED, lock_order);
+	if (NULL == spinlock->lock) {
+		mali_spinlock_reentrant_term(spinlock);
+		return NULL;
+	}
+
+	return spinlock;
+}
+
+void mali_spinlock_reentrant_term(struct mali_spinlock_reentrant *spinlock)
+{
+	MALI_DEBUG_ASSERT_POINTER(spinlock);
+	MALI_DEBUG_ASSERT(0 == spinlock->counter && 0 == spinlock->owner);
+
+	if (NULL != spinlock->lock) {
+		_mali_osk_spinlock_irq_term(spinlock->lock);
+	}
+
+	_mali_osk_free(spinlock);
+}
+
+void mali_spinlock_reentrant_wait(struct mali_spinlock_reentrant *spinlock, u32 tid)
+{
+	MALI_DEBUG_ASSERT_POINTER(spinlock);
+	MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
+	MALI_DEBUG_ASSERT(0 != tid);
+
+	MALI_DEBUG_PRINT(5, ("%s ^\n", __FUNCTION__));
+
+	if (tid != spinlock->owner) {
+		_mali_osk_spinlock_irq_lock(spinlock->lock);
+		MALI_DEBUG_ASSERT(0 == spinlock->owner && 0 == spinlock->counter);
+		spinlock->owner = tid;
+	}
+
+	MALI_DEBUG_PRINT(5, ("%s v\n", __FUNCTION__));
+
+	++spinlock->counter;
+}
+
+void mali_spinlock_reentrant_signal(struct mali_spinlock_reentrant *spinlock, u32 tid)
+{
+	MALI_DEBUG_ASSERT_POINTER(spinlock);
+	MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
+	MALI_DEBUG_ASSERT(0 != tid && tid == spinlock->owner);
+
+	--spinlock->counter;
+	if (0 == spinlock->counter) {
+		spinlock->owner = 0;
+		MALI_DEBUG_PRINT(5, ("%s release last\n", __FUNCTION__));
+		_mali_osk_spinlock_irq_unlock(spinlock->lock);
+	}
+}