/*	$NetBSD: bus_defs.h,v 1.1 2011/07/01 17:10:01 dyoung Exp $	*/

/*-
 * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
 * NASA Ames Research Center.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright (c) 1996 Charles M. Hannum.  All rights reserved.
 * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Christopher G. Demetriou
 *	for the NetBSD Project.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _SPARC_BUS_DEFS_H_
#define _SPARC_BUS_DEFS_H_

/*
 * Bus address and size types
 */
typedef	u_long		bus_space_handle_t;
typedef uint64_t	bus_addr_t;
typedef u_long		bus_size_t;

#define	SPARC_BUS_SPACE	0

/* bus_addr_t is extended to 64-bits and has the iospace encoded in it */
#define	BUS_ADDR_IOSPACE(x)	((x)>>32)
#define	BUS_ADDR_PADDR(x)	((x)&0xffffffff)
#define	BUS_ADDR(io, pa)	\
	((((uint64_t)(uint32_t)(io))<<32) | (uint32_t)(pa))

#define __BUS_SPACE_HAS_STREAM_METHODS	1

/*
 * Access methods for bus resources and address space.
 */
typedef struct sparc_bus_space_tag	*bus_space_tag_t;

struct sparc_bus_space_tag {
	void		*cookie;
	bus_space_tag_t	parent;

	/*
	 * Windows onto the parent bus that this tag maps.  If ranges
	 * is non-NULL, the address will be translated, and recursively
	 * mapped via the parent tag.
	 */
	struct openprom_range *ranges;
	int nranges;

	int	(*sparc_bus_map)(
				bus_space_tag_t,
				bus_addr_t,
				bus_size_t,
				int,			/*flags*/
				vaddr_t,		/*preferred vaddr*/
				bus_space_handle_t *);
	int	(*sparc_bus_unmap)(
				bus_space_tag_t,
				bus_space_handle_t,
				bus_size_t);
	int	(*sparc_bus_subregion)(
				bus_space_tag_t,
				bus_space_handle_t,
				bus_size_t,		/*offset*/
				bus_size_t,		/*size*/
				bus_space_handle_t *);

	void	(*sparc_bus_barrier)(
				bus_space_tag_t,
				bus_space_handle_t,
				bus_size_t,		/*offset*/
				bus_size_t,		/*size*/
				int);			/*flags*/

	paddr_t	(*sparc_bus_mmap)(
				bus_space_tag_t,
				bus_addr_t,
				off_t,
				int,			/*prot*/
				int);			/*flags*/

	void	*(*sparc_intr_establish)(
				bus_space_tag_t,
				int,			/*bus-specific intr*/
				int,			/*device class level,
							  see machine/intr.h*/
				int (*)(void *),	/*handler*/
				void *,			/*handler arg*/
				void (*)(void));	/*optional fast vector*/

	uint8_t (*sparc_read_1)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset);

	uint16_t (*sparc_read_2)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset);

	uint32_t (*sparc_read_4)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset);

	uint64_t (*sparc_read_8)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset);

	void	(*sparc_write_1)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset,
				uint8_t value);

	void	(*sparc_write_2)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset,
				uint16_t value);

	void	(*sparc_write_4)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset,
				uint32_t value);

	void	(*sparc_write_8)(
				bus_space_tag_t space,
				bus_space_handle_t handle,
				bus_size_t offset,
				uint64_t value);
};

/* flags for bus space map functions */
#define BUS_SPACE_MAP_BUS1	0x0100	/* placeholders for bus functions... */
#define BUS_SPACE_MAP_BUS2	0x0200
#define BUS_SPACE_MAP_BUS3	0x0400
#define BUS_SPACE_MAP_LARGE	0x0800	/* map outside IODEV range */


/* flags for bus_space_barrier() */
#define	BUS_SPACE_BARRIER_READ	0x01		/* force read barrier */
#define	BUS_SPACE_BARRIER_WRITE	0x02		/* force write barrier */

#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)

/*
 * Flags used in various bus DMA methods.
 */
#define	BUS_DMA_WAITOK		0x000	/* safe to sleep (pseudo-flag) */
#define	BUS_DMA_NOWAIT		0x001	/* not safe to sleep */
#define	BUS_DMA_ALLOCNOW	0x002	/* perform resource allocation now */
#define	BUS_DMA_COHERENT	0x004	/* hint: map memory DMA coherent */
#define	BUS_DMA_STREAMING	0x008	/* hint: sequential, unidirectional */
#define	BUS_DMA_BUS1		0x010	/* placeholders for bus functions... */
#define	BUS_DMA_BUS2		0x020
#define	BUS_DMA_BUS3		0x040
#define	BUS_DMA_BUS4		0x080
#define	BUS_DMA_READ		0x100	/* mapping is device -> memory only */
#define	BUS_DMA_WRITE		0x200	/* mapping is memory -> device only */
#define	BUS_DMA_NOCACHE		0x400	/* hint: map non-cached memory */

/* For devices that have a 24-bit address space */
#define BUS_DMA_24BIT		BUS_DMA_BUS1

/* Internal flag: current DVMA address is equal to the KVA buffer address */
#define _BUS_DMA_DIRECTMAP	BUS_DMA_BUS2

/* Forwards needed by prototypes below. */
struct mbuf;
struct uio;

/*
 * Operations performed by bus_dmamap_sync().
 */
#define	BUS_DMASYNC_PREREAD	0x01	/* pre-read synchronization */
#define	BUS_DMASYNC_POSTREAD	0x02	/* post-read synchronization */
#define	BUS_DMASYNC_PREWRITE	0x04	/* pre-write synchronization */
#define	BUS_DMASYNC_POSTWRITE	0x08	/* post-write synchronization */

typedef struct sparc_bus_dma_tag	*bus_dma_tag_t;
typedef struct sparc_bus_dmamap		*bus_dmamap_t;

#define BUS_DMA_TAG_VALID(t)    ((t) != (bus_dma_tag_t)0)

/*
 *	bus_dma_segment_t
 *
 *	Describes a single contiguous DMA transaction.  Values
 *	are suitable for programming into DMA registers.
 */
struct sparc_bus_dma_segment {
	bus_addr_t	ds_addr;	/* DVMA address */
	bus_size_t	ds_len;		/* length of transfer */
	bus_size_t	_ds_sgsize;	/* size of allocated DVMA segment */
	void		*_ds_mlist;	/* page list when dmamem_alloc'ed */
	vaddr_t		_ds_va;		/* VA when dmamem_map'ed */
};
typedef struct sparc_bus_dma_segment	bus_dma_segment_t;


/*
 *	bus_dma_tag_t
 *
 *	A machine-dependent opaque type describing the implementation of
 *	DMA for a given bus.
 */
struct sparc_bus_dma_tag {
	void	*_cookie;		/* cookie used in the guts */

	/*
	 * DMA mapping methods.
	 */
	int	(*_dmamap_create)(bus_dma_tag_t, bus_size_t, int,
		    bus_size_t, bus_size_t, int, bus_dmamap_t *);
	void	(*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
	int	(*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *,
		    bus_size_t, struct proc *, int);
	int	(*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t,
		    struct mbuf *, int);
	int	(*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t,
		    struct uio *, int);
	int	(*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t,
		    bus_dma_segment_t *, int, bus_size_t, int);
	void	(*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
	void	(*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
		    bus_addr_t, bus_size_t, int);

	/*
	 * DMA memory utility functions.
	 */
	int	(*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t,
		    bus_size_t, bus_dma_segment_t *, int, int *, int);
	void	(*_dmamem_free)(bus_dma_tag_t,
		    bus_dma_segment_t *, int);
	int	(*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *,
		    int, size_t, void **, int);
	void	(*_dmamem_unmap)(bus_dma_tag_t, void *, size_t);
	paddr_t	(*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
		    int, off_t, int, int);
};

/*
 *	bus_dmamap_t
 *
 *	Describes a DMA mapping.
 */
struct sparc_bus_dmamap {
	/*
	 * PRIVATE MEMBERS: not for use by machine-independent code.
	 */
	bus_size_t	_dm_size;	/* largest DMA transfer mappable */
	int		_dm_segcnt;	/* number of segs this map can map */
	bus_size_t	_dm_maxmaxsegsz; /* fixed largest possible segment */
	bus_size_t	_dm_boundary;	/* don't cross this */
	int		_dm_flags;	/* misc. flags */

	void		*_dm_cookie;	/* cookie for bus-specific functions */

	u_long		_dm_align;	/* DVMA alignment; must be a
					   multiple of the page size */
	u_long		_dm_ex_start;	/* constraints on DVMA map */
	u_long		_dm_ex_end;	/* allocations; used by the VME bus
					   driver and by the IOMMU driver
					   when mapping 24-bit devices */

	/*
	 * PUBLIC MEMBERS: these are used by machine-independent code.
	 */
	bus_size_t	dm_maxsegsz;	/* largest possible segment */
	bus_size_t	dm_mapsize;	/* size of the mapping */
	int		dm_nsegs;	/* # valid segments in mapping */
	bus_dma_segment_t dm_segs[1];	/* segments; variable length */
};

#endif /* _SPARC_BUS_DEFS_H_ */