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/* $Id$
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
* Copyright (C) 2000 by Colin Ngam
*/
#ifndef _ASM_SN_DMAMAP_H
#define _ASM_SN_DMAMAP_H
#include <asm/sn/sv.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Definitions for allocating, freeing, and using DMA maps
*/
/*
* DMA map types
*/
#define DMA_SCSI 0
#define DMA_A24VME 1 /* Challenge/Onyx only */
#define DMA_A32VME 2 /* Challenge/Onyx only */
#define DMA_A64VME 3 /* SN0/Racer */
#define DMA_EISA 4
#define DMA_PCI32 5 /* SN0/Racer */
#define DMA_PCI64 6 /* SN0/Racer */
/*
* DMA map structure as returned by dma_mapalloc()
*/
typedef struct dmamap {
int dma_type; /* Map type (see above) */
int dma_adap; /* I/O adapter */
int dma_index; /* Beginning map register to use */
int dma_size; /* Number of map registers to use */
paddr_t dma_addr; /* Corresponding bus addr for A24/A32 */
caddr_t dma_virtaddr; /* Beginning virtual address that is mapped */
} dmamap_t;
struct alenlist_s;
/*
* Prototypes of exported functions
*/
extern dmamap_t *dma_mapalloc(int, int, int, int);
extern void dma_mapfree(dmamap_t *);
extern int dma_map(dmamap_t *, caddr_t, int);
extern int dma_map2(dmamap_t *, caddr_t, caddr_t, int);
extern paddr_t dma_mapaddr(dmamap_t *, caddr_t);
#ifdef LATER
extern int dma_mapbp(dmamap_t *, buf_t *, int);
#endif
extern int dma_map_alenlist(dmamap_t *, struct alenlist_s *, size_t);
extern uint ev_kvtoiopnum(caddr_t);
/*
* These variables are defined in master.d/kernel
*/
extern struct map *a24map[];
extern struct map *a32map[];
extern int a24_mapsize;
extern int a32_mapsize;
extern lock_t dmamaplock;
extern sv_t dmamapout;
#ifdef __cplusplus
}
#endif
/* standard flags values for pio_map routines,
* including {xtalk,pciio}_dmamap calls.
* NOTE: try to keep these in step with PIOMAP flags.
*/
#define DMAMAP_FIXED 0x1
#define DMAMAP_NOSLEEP 0x2
#define DMAMAP_INPLACE 0x4
#define DMAMAP_FLAGS 0x7
#endif /* _ASM_SN_DMAMAP_H */
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