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 typedef int (*of_iommu_init_fn)(struct device_node *);
  38
  39 #define IOMMU_OF_DECLARE(name, compat, fn) \
  40         _OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn)
  41
  42 #endif /* __OF_IOMMU_H */