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
10 extern 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
14 extern const struct iommu_ops *of_iommu_configure(struct device *dev,
15 struct device_node *master_np);
16
17 #else
18
of_get_dma_window(struct device_node * dn,const char * prefix,int index,unsigned long * busno,dma_addr_t * addr,size_t * size)19 static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
20 int index, unsigned long *busno, dma_addr_t *addr,
21 size_t *size)
22 {
23 return -EINVAL;
24 }
25
of_iommu_configure(struct device * dev,struct device_node * master_np)26 static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
27 struct device_node *master_np)
28 {
29 return NULL;
30 }
31
32 #endif /* CONFIG_OF_IOMMU */
33
34 void of_iommu_set_ops(struct device_node *np, const struct iommu_ops *ops);
35 const struct iommu_ops *of_iommu_get_ops(struct device_node *np);
36
37 extern struct of_device_id __iommu_of_table;
38
39 typedef int (*of_iommu_init_fn)(struct device_node *);
40
41 #define IOMMU_OF_DECLARE(name, compat, fn) \
42 _OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn)
43
44 #endif /* __OF_IOMMU_H */
45