linux/arch/powerpc/include/asm/device.h

/*
 * Arch specific extensions to struct device
 *
 * This file is released under the GPLv2
 */
#ifndef _ASM_POWERPC_DEVICE_H
#define _ASM_POWERPC_DEVICE_H

struct dma_map_ops;
struct device_node;

struct dev_archdata {
	/* Optional pointer to an OF device node */
	struct device_node	*of_node;

	/* DMA operations on that device */
	struct dma_map_ops	*dma_ops;

	/*
	 * When an iommu is in use, dma_data is used as a ptr to the base of the
	 * iommu_table.  Otherwise, it is a simple numerical offset.
	 */
	union {
		dma_addr_t	dma_offset;
		void		*iommu_table_base;
	} dma_data;

#ifdef CONFIG_SWIOTLB
	dma_addr_t		max_direct_dma_addr;
#endif
};

static inline void dev_archdata_set_node(struct dev_archdata *ad,
					 struct device_node *np)
{
	ad->of_node = np;
}

static inline struct device_node *
dev_archdata_get_node(const struct dev_archdata *ad)
{
	return ad->of_node;
}

struct pdev_archdata {
};

#endif /* _ASM_POWERPC_DEVICE_H */