busdma_impl.h revision 259512 
1/*-
2 * Copyright (c) 2013 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
6 * under sponsorship from the FreeBSD Foundation.
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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/10/sys/x86/include/busdma_impl.h 259512 2013-12-17 13:49:35Z kib $
30 */
31
32#ifndef	__X86_BUSDMA_IMPL_H
33#define	__X86_BUSDMA_IMPL_H
34
35struct bus_dma_tag_common {
36	struct bus_dma_impl *impl;
37	struct bus_dma_tag_common *parent;
38	bus_size_t	  alignment;
39	bus_addr_t	  boundary;
40	bus_addr_t	  lowaddr;
41	bus_addr_t	  highaddr;
42	bus_dma_filter_t *filter;
43	void		 *filterarg;
44	bus_size_t	  maxsize;
45	u_int		  nsegments;
46	bus_size_t	  maxsegsz;
47	int		  flags;
48	bus_dma_lock_t	 *lockfunc;
49	void		 *lockfuncarg;
50	int		  ref_count;
51};
52
53struct bus_dma_impl {
54	int (*tag_create)(bus_dma_tag_t parent,
55	    bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,
56	    bus_addr_t highaddr, bus_dma_filter_t *filter,
57	    void *filterarg, bus_size_t maxsize, int nsegments,
58	    bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
59	    void *lockfuncarg, bus_dma_tag_t *dmat);
60	int (*tag_destroy)(bus_dma_tag_t dmat);
61	int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
62	int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map);
63	int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags,
64	    bus_dmamap_t *mapp);
65	void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
66	int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map,
67	    struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,
68	    bus_dma_segment_t *segs, int *segp);
69	int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map,
70	    vm_paddr_t buf, bus_size_t buflen, int flags,
71	    bus_dma_segment_t *segs, int *segp);
72	int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map,
73	    void *buf, bus_size_t buflen, pmap_t pmap, int flags,
74	    bus_dma_segment_t *segs, int *segp);
75	void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map,
76	    struct memdesc *mem, bus_dmamap_callback_t *callback,
77	    void *callback_arg);
78	bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map,
79	    bus_dma_segment_t *segs, int nsegs, int error);
80	void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map);
81	void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map,
82	    bus_dmasync_op_t op);
83};
84
85void bus_dma_dflt_lock(void *arg, bus_dma_lock_op_t op);
86int bus_dma_run_filter(struct bus_dma_tag_common *dmat, bus_addr_t paddr);
87int common_bus_dma_tag_create(struct bus_dma_tag_common *parent,
88    bus_size_t alignment,
89    bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,
90    bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize,
91    int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
92    void *lockfuncarg, size_t sz, void **dmat);
93
94extern struct bus_dma_impl bus_dma_bounce_impl;
95
96#endif
97