1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __OF_IOMMU_H
3 #define __OF_IOMMU_H
4
5 #include <linux/device.h>
6 #include <linux/iommu.h>
7 #include <linux/of.h>
8
9 #ifdef CONFIG_OF_IOMMU
10
11 extern int of_get_dma_window(struct device_node *dn, const char *prefix,
12 int index, unsigned long *busno, dma_addr_t *addr,
13 size_t *size);
14
15 extern const struct iommu_ops *of_iommu_configure(struct device *dev,
16 struct device_node *master_np);
17
18 #else
19
of_get_dma_window(struct device_node * dn,const char * prefix,int index,unsigned long * busno,dma_addr_t * addr,size_t * size)20 static 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
of_iommu_configure(struct device * dev,struct device_node * master_np)27 static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
28 struct device_node *master_np)
29 {
30 return NULL;
31 }
32
33 #endif /* CONFIG_OF_IOMMU */
34
35 #endif /* __OF_IOMMU_H */
36