diff options
Diffstat (limited to 'kernel/include/linux/of_iommu.h')
| -rw-r--r-- | kernel/include/linux/of_iommu.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/kernel/include/linux/of_iommu.h b/kernel/include/linux/of_iommu.h new file mode 100644 index 000000000..ffbe4707d --- /dev/null +++ b/kernel/include/linux/of_iommu.h @@ -0,0 +1,46 @@ +#ifndef __OF_IOMMU_H +#define __OF_IOMMU_H + +#include <linux/device.h> +#include <linux/iommu.h> +#include <linux/of.h> + +#ifdef CONFIG_OF_IOMMU + +extern int of_get_dma_window(struct device_node *dn, const char *prefix, + int index, unsigned long *busno, dma_addr_t *addr, + size_t *size); + +extern void of_iommu_init(void); +extern struct iommu_ops *of_iommu_configure(struct device *dev, + struct device_node *master_np); + +#else + +static inline int of_get_dma_window(struct device_node *dn, const char *prefix, + int index, unsigned long *busno, dma_addr_t *addr, + size_t *size) +{ + return -EINVAL; +} + +static inline void of_iommu_init(void) { } +static inline struct iommu_ops *of_iommu_configure(struct device *dev, + struct device_node *master_np) +{ + return NULL; +} + +#endif /* CONFIG_OF_IOMMU */ + +void of_iommu_set_ops(struct device_node *np, struct iommu_ops *ops); +struct iommu_ops *of_iommu_get_ops(struct device_node *np); + +extern struct of_device_id __iommu_of_table; + +typedef int (*of_iommu_init_fn)(struct device_node *); + +#define IOMMU_OF_DECLARE(name, compat, fn) \ + _OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn) + +#endif /* __OF_IOMMU_H */ |