Initial import

1 files changed, 46 insertions, 0 deletions

diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
new file mode 100644
index 000000000..ffbe4707d
--- /dev/null
+++ b/include/linux/of_iommu.h
@@ -0,0 +1,46 @@
+#ifndef __OF_IOMMU_H
+#define __OF_IOMMU_H
+
+#include <linux/device.h>
+#include <linux/iommu.h>
+#include <linux/of.h>
+
+#ifdef CONFIG_OF_IOMMU
+
+extern int of_get_dma_window(struct device_node *dn, const char *prefix,
+			     int index, unsigned long *busno, dma_addr_t *addr,
+			     size_t *size);
+
+extern void of_iommu_init(void);
+extern struct iommu_ops *of_iommu_configure(struct device *dev,
+					struct device_node *master_np);
+
+#else
+
+static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
+			    int index, unsigned long *busno, dma_addr_t *addr,
+			    size_t *size)
+{
+	return -EINVAL;
+}
+
+static inline void of_iommu_init(void) { }
+static inline struct iommu_ops *of_iommu_configure(struct device *dev,
+					 struct device_node *master_np)
+{
+	return NULL;
+}
+
+#endif	/* CONFIG_OF_IOMMU */
+
+void of_iommu_set_ops(struct device_node *np, struct iommu_ops *ops);
+struct iommu_ops *of_iommu_get_ops(struct device_node *np);
+
+extern struct of_device_id __iommu_of_table;
+
+typedef int (*of_iommu_init_fn)(struct device_node *);
+
+#define IOMMU_OF_DECLARE(name, compat, fn) \
+	_OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn)
+
+#endif /* __OF_IOMMU_H */