1. 根目录:
2. arch
3. sparc
4. include
5. asm
6. ebus_dma.h

#ifndef __ASM_SPARC_EBUS_DMA_H
#define __ASM_SPARC_EBUS_DMA_H

struct ebus_dma_info {
	spinlock_t	lock;
	void __iomem	*regs;

	unsigned int	flags;
#define EBUS_DMA_FLAG_USE_EBDMA_HANDLER		0x00000001
#define EBUS_DMA_FLAG_TCI_DISABLE		0x00000002

	/* These are only valid is EBUS_DMA_FLAG_USE_EBDMA_HANDLER is
	 * set.
	 */
	void (*callback)(struct ebus_dma_info *p, int event, void *cookie);
	void *client_cookie;
	unsigned int	irq;
#define EBUS_DMA_EVENT_ERROR	1
#define EBUS_DMA_EVENT_DMA	2
#define EBUS_DMA_EVENT_DEVICE	4

	unsigned char	name[64];
};

extern int ebus_dma_register(struct ebus_dma_info *p);
extern int ebus_dma_irq_enable(struct ebus_dma_info *p, int on);
extern void ebus_dma_unregister(struct ebus_dma_info *p);
extern int ebus_dma_request(struct ebus_dma_info *p, dma_addr_t bus_addr,
			    size_t len);
extern void ebus_dma_prepare(struct ebus_dma_info *p, int write);
extern unsigned int ebus_dma_residue(struct ebus_dma_info *p);
extern unsigned int ebus_dma_addr(struct ebus_dma_info *p);
extern void ebus_dma_enable(struct ebus_dma_info *p, int on);

#endif /* __ASM_SPARC_EBUS_DMA_H */