LXR linux/include/linux/of

   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
  11extern 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
  15extern const struct iommu_ops *of_iommu_configure(struct device *dev,
  16                                        struct device_node *master_np,
  17                                        const u32 *id);
  18
  19#else
  20
  21static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
  22                            int index, unsigned long *busno, dma_addr_t *addr,
  23                            size_t *size)
  24{
  25        return -EINVAL;
  26}
  27
  28static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
  29                                         struct device_node *master_np,
  30                                         const u32 *id)
  31{
  32        return NULL;
  33}
  34
  35#endif  /* CONFIG_OF_IOMMU */
  36
  37#endif /* __OF_IOMMU_H */
  38