Merge tag 'iommu-updates-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / include / linux / of_iommu.h
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
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
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 extern struct of_device_id __iommu_of_table;
36
37 #define IOMMU_OF_DECLARE(name, compat)  OF_DECLARE_1(iommu, name, compat, NULL)
38
39 #endif /* __OF_IOMMU_H */