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 void of_iommu_init(void); 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 void of_iommu_init(void) { } 28 static inline const struct iommu_ops *of_iommu_configure(struct device *dev, 29 struct device_node *master_np) 30 { 31 return NULL; 32 } 33 34 #endif /* CONFIG_OF_IOMMU */ 35 36 void of_iommu_set_ops(struct device_node *np, const struct iommu_ops *ops); 37 const struct iommu_ops *of_iommu_get_ops(struct device_node *np); 38 39 extern struct of_device_id __iommu_of_table; 40 41 typedef int (*of_iommu_init_fn)(struct device_node *); 42 43 #define IOMMU_OF_DECLARE(name, compat, fn) \ 44 _OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn) 45 46 #endif /* __OF_IOMMU_H */ 47