2 * Copyright (c) 2013 The FreeBSD Foundation
4 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
5 * under sponsorship from the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #ifndef _MACHINE_BUS_DMA_IMPL_H_
30 #define _MACHINE_BUS_DMA_IMPL_H_
32 struct bus_dma_tag_common {
33 struct bus_dma_impl *impl;
34 struct bus_dma_tag_common *parent;
39 bus_dma_filter_t *filter;
45 bus_dma_lock_t *lockfunc;
51 int (*tag_create)(bus_dma_tag_t parent,
52 bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,
53 bus_addr_t highaddr, bus_dma_filter_t *filter,
54 void *filterarg, bus_size_t maxsize, int nsegments,
55 bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
56 void *lockfuncarg, bus_dma_tag_t *dmat);
57 int (*tag_destroy)(bus_dma_tag_t dmat);
58 int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
59 int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map);
60 int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags,
62 void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
63 int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map,
64 struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,
65 bus_dma_segment_t *segs, int *segp);
66 int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map,
67 vm_paddr_t buf, bus_size_t buflen, int flags,
68 bus_dma_segment_t *segs, int *segp);
69 int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map,
70 void *buf, bus_size_t buflen, struct pmap *pmap, int flags,
71 bus_dma_segment_t *segs, int *segp);
72 void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map,
73 struct memdesc *mem, bus_dmamap_callback_t *callback,
75 bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map,
76 bus_dma_segment_t *segs, int nsegs, int error);
77 void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map);
78 void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map,
82 int bus_dma_run_filter(struct bus_dma_tag_common *dmat, bus_addr_t paddr);
83 int common_bus_dma_tag_create(struct bus_dma_tag_common *parent,
85 bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,
86 bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize,
87 int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
88 void *lockfuncarg, size_t sz, void **dmat);
90 extern struct bus_dma_impl bus_dma_bounce_impl;