iommuvar.h revision 1.7 
1/*	$OpenBSD: iommuvar.h,v 1.7 2003/02/17 01:29:20 henric 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-Streaming Buffer state
37 */
38
39struct strbuf_ctl {
40	bus_space_tag_t		sb_bustag;	/* streaming buffer registers */
41	bus_space_handle_t	sb_sb;		/* Handle for our regs */
42	paddr_t			sb_flushpa;	/* to flush streaming buffers */
43	volatile int64_t	*sb_flush;
44};
45
46/*
47 * per-IOMMU state
48 */
49struct iommu_state {
50	paddr_t			is_ptsb;	/* TSB physical address */
51	int64_t			*is_tsb;	/* TSB virtual address */
52	int			is_tsbsize;	/* 0 = 8K, ... */
53	u_int			is_dvmabase;
54	u_int			is_dvmaend;
55	int64_t			is_cr;		/* IOMMU control register value */
56	struct extent		*is_dvmamap;	/* DVMA map for this instance */
57
58	struct strbuf_ctl	*is_sb[2];	/* Streaming buffers if any */
59
60	/* copies of our parents state, to allow us to be self contained */
61	bus_space_tag_t		is_bustag;	/* our bus tag */
62	bus_space_handle_t	is_iommu;	/* IOMMU registers */
63};
64
65/* interfaces for PCI/SBUS code */
66void	iommu_init(char *, struct iommu_state *, int, u_int32_t);
67void	iommu_reset(struct iommu_state *);
68void    iommu_enter(struct iommu_state *, vaddr_t, int64_t, int);
69void    iommu_remove(struct iommu_state *, vaddr_t, size_t);
70paddr_t iommu_extract(struct iommu_state *, vaddr_t);
71
72int	iommu_dvmamap_load(bus_dma_tag_t, struct iommu_state *,
73	    bus_dmamap_t, void *, bus_size_t, struct proc *, int);
74void	iommu_dvmamap_unload(bus_dma_tag_t, struct iommu_state *,
75	    bus_dmamap_t);
76int	iommu_dvmamap_load_raw(bus_dma_tag_t, struct iommu_state *,
77	    bus_dmamap_t, bus_dma_segment_t *, int, int, bus_size_t);
78void	iommu_dvmamap_sync(bus_dma_tag_t, struct iommu_state *,
79	    bus_dmamap_t, bus_addr_t, bus_size_t, int);
80int	iommu_dvmamem_alloc(bus_dma_tag_t, struct iommu_state *,
81	    bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *,
82	    int, int *, int);
83void	iommu_dvmamem_free(bus_dma_tag_t, struct iommu_state *,
84	    bus_dma_segment_t *, int);
85int	iommu_dvmamem_map(bus_dma_tag_t, struct iommu_state *,
86	    bus_dma_segment_t *, int, size_t, caddr_t *, int);
87void	iommu_dvmamem_unmap(bus_dma_tag_t, struct iommu_state *,
88	    caddr_t, size_t);
89
90#define IOMMUREG_READ(is, reg)				\
91	bus_space_read_8((is)->is_bustag,		\
92		(is)->is_iommu,				\
93		IOMMUREG(reg))
94
95#define IOMMUREG_WRITE(is, reg, v)			\
96	bus_space_write_8((is)->is_bustag,		\
97		(is)->is_iommu,				\
98		IOMMUREG(reg),				\
99		(v))
100
101#endif /* _SPARC64_DEV_IOMMUVAR_H_ */
102
103