1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __OF_IOMMU_H
3*4882a593Smuzhiyun #define __OF_IOMMU_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/device.h>
6*4882a593Smuzhiyun #include <linux/iommu.h>
7*4882a593Smuzhiyun #include <linux/of.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #ifdef CONFIG_OF_IOMMU
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun extern int of_get_dma_window(struct device_node *dn, const char *prefix,
12*4882a593Smuzhiyun int index, unsigned long *busno, dma_addr_t *addr,
13*4882a593Smuzhiyun size_t *size);
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun extern const struct iommu_ops *of_iommu_configure(struct device *dev,
16*4882a593Smuzhiyun struct device_node *master_np,
17*4882a593Smuzhiyun const u32 *id);
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #else
20*4882a593Smuzhiyun
of_get_dma_window(struct device_node * dn,const char * prefix,int index,unsigned long * busno,dma_addr_t * addr,size_t * size)21*4882a593Smuzhiyun static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
22*4882a593Smuzhiyun int index, unsigned long *busno, dma_addr_t *addr,
23*4882a593Smuzhiyun size_t *size)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun return -EINVAL;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
of_iommu_configure(struct device * dev,struct device_node * master_np,const u32 * id)28*4882a593Smuzhiyun static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
29*4882a593Smuzhiyun struct device_node *master_np,
30*4882a593Smuzhiyun const u32 *id)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun return NULL;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #endif /* CONFIG_OF_IOMMU */
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun #endif /* __OF_IOMMU_H */
38