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 const struct iommu_ops *of_iommu_configure(struct device *dev, 15 struct device_node *master_np); 16 17 #else 18 19 static inline int of_get_dma_window(struct device_node *dn, const char *prefix, 20 int index, unsigned long *busno, dma_addr_t *addr, 21 size_t *size) 22 { 23 return -EINVAL; 24 } 25 26 static inline const struct iommu_ops *of_iommu_configure(struct device *dev, 27 struct device_node *master_np) 28 { 29 return NULL; 30 } 31 32 #endif /* CONFIG_OF_IOMMU */ 33 34 static inline void of_iommu_set_ops(struct device_node *np, 35 const struct iommu_ops *ops) 36 { 37 iommu_register_instance(&np->fwnode, ops); 38 } 39 40 static inline const struct iommu_ops *of_iommu_get_ops(struct device_node *np) 41 { 42 return iommu_get_instance(&np->fwnode); 43 } 44 45 extern struct of_device_id __iommu_of_table; 46 47 typedef int (*of_iommu_init_fn)(struct device_node *); 48 49 #define IOMMU_OF_DECLARE(name, compat, fn) \ 50 _OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn) 51 52 #endif /* __OF_IOMMU_H */ 53