of_iommu.h 821 Bytes
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __OF_IOMMU_H
#define __OF_IOMMU_H

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#include <linux/device.h>
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#include <linux/iommu.h>
#include <linux/of.h>

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#ifdef CONFIG_OF_IOMMU

extern int of_get_dma_window(struct device_node *dn, const char *prefix,
			     int index, unsigned long *busno, dma_addr_t *addr,
			     size_t *size);

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extern const struct iommu_ops *of_iommu_configure(struct device *dev,
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					struct device_node *master_np);
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#else

static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
			    int index, unsigned long *busno, dma_addr_t *addr,
			    size_t *size)
{
	return -EINVAL;
}

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static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
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					 struct device_node *master_np)
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{
	return NULL;
}
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#endif	/* CONFIG_OF_IOMMU */

#endif /* __OF_IOMMU_H */