include/linux/of_iommu.h

   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 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 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, struct iommu_ops *ops);
  37 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 */