iommuvar.h revision 1.6 
1/*	$OpenBSD: iommuvar.h,v 1.6 2002/03/14 01:26:44 millert Exp $	*/
2/*	$NetBSD: iommuvar.h,v 1.9 2001/10/07 20:30:41 eeh Exp $	*/
3
4/*
5 * Copyright (c) 1999 Matthew R. Green
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef _SPARC64_DEV_IOMMUVAR_H_
33#define _SPARC64_DEV_IOMMUVAR_H_
34
35/*
36 * per-IOMMU state
37 */
38struct iommu_state {
39	paddr_t			is_ptsb;	/* TSB physical address */
40	int64_t			*is_tsb;	/* TSB virtual address */
41	int			is_tsbsize;	/* 0 = 8K, ... */
42	u_int			is_dvmabase;
43	u_int			is_dvmaend;
44	int64_t			is_cr;		/* IOMMU control regiter value */
45	struct extent		*is_dvmamap;	/* DVMA map for this instance */
46
47	paddr_t			is_flushpa;	/* used to flush the SBUS */
48	/* Needs to be volatile or egcs optimizes away loads */
49	volatile int64_t	is_flush[2];
50
51	/* copies of our parents state, to allow us to be self contained */
52	bus_space_tag_t		is_bustag;	/* our bus tag */
53	struct iommureg		*is_iommu;	/* IOMMU registers */
54	struct iommu_strbuf	*is_sb[2];	/* streaming buffer(s) */
55};
56
57/* interfaces for PCI/SBUS code */
58void	iommu_init(char *, struct iommu_state *, int, u_int32_t);
59void	iommu_reset(struct iommu_state *);
60void    iommu_enter(struct iommu_state *, vaddr_t, int64_t, int);
61void    iommu_remove(struct iommu_state *, vaddr_t, size_t);
62paddr_t iommu_extract(struct iommu_state *, vaddr_t);
63
64int	iommu_dvmamap_load(bus_dma_tag_t, struct iommu_state *,
65	    bus_dmamap_t, void *, bus_size_t, struct proc *, int);
66void	iommu_dvmamap_unload(bus_dma_tag_t, struct iommu_state *,
67	    bus_dmamap_t);
68int	iommu_dvmamap_load_raw(bus_dma_tag_t, struct iommu_state *,
69	    bus_dmamap_t, bus_dma_segment_t *, int, int, bus_size_t);
70void	iommu_dvmamap_sync(bus_dma_tag_t, struct iommu_state *,
71	    bus_dmamap_t, bus_addr_t, bus_size_t, int);
72int	iommu_dvmamem_alloc(bus_dma_tag_t, struct iommu_state *,
73	    bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *,
74	    int, int *, int);
75void	iommu_dvmamem_free(bus_dma_tag_t, struct iommu_state *,
76	    bus_dma_segment_t *, int);
77int	iommu_dvmamem_map(bus_dma_tag_t, struct iommu_state *,
78	    bus_dma_segment_t *, int, size_t, caddr_t *, int);
79void	iommu_dvmamem_unmap(bus_dma_tag_t, struct iommu_state *,
80	    caddr_t, size_t);
81
82#endif /* _SPARC64_DEV_IOMMUVAR_H_ */
83