1#ifndef __OF_IOMMU_H
2#define __OF_IOMMU_H
3
4#include <linux/device.h>
5#include <linux/iommu.h>
6#include <linux/of.h>
7
8#ifdef CONFIG_OF_IOMMU
9
10extern int of_get_dma_window(struct device_node *dn, const char *prefix,
11			     int index, unsigned long *busno, dma_addr_t *addr,
12			     size_t *size);
13
14extern void of_iommu_init(void);
15extern struct iommu_ops *of_iommu_configure(struct device *dev,
16					struct device_node *master_np);
17
18#else
19
20static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
21			    int index, unsigned long *busno, dma_addr_t *addr,
22			    size_t *size)
23{
24	return -EINVAL;
25}
26
27static inline void of_iommu_init(void) { }
28static inline struct iommu_ops *of_iommu_configure(struct device *dev,
29					 struct device_node *master_np)
30{
31	return NULL;
32}
33
34#endif	/* CONFIG_OF_IOMMU */
35
36void of_iommu_set_ops(struct device_node *np, struct iommu_ops *ops);
37struct iommu_ops *of_iommu_get_ops(struct device_node *np);
38
39extern struct of_device_id __iommu_of_table;
40
41typedef int (*of_iommu_init_fn)(struct device_node *);
42
43#define IOMMU_OF_DECLARE(name, compat, fn) \
44	_OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn)
45
46#endif /* __OF_IOMMU_H */
47