1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2013 The FreeBSD Foundation
5 *
6 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
7 * under sponsorship from the FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $FreeBSD$
31 */
32
33 #ifndef __X86_BUSDMA_IMPL_H
34 #define __X86_BUSDMA_IMPL_H
35
36 struct bus_dma_tag_common {
37 struct bus_dma_impl *impl;
38 struct bus_dma_tag_common *parent;
39 bus_size_t alignment;
40 bus_addr_t boundary;
41 bus_addr_t lowaddr;
42 bus_addr_t highaddr;
43 bus_dma_filter_t *filter;
44 void *filterarg;
45 bus_size_t maxsize;
46 u_int nsegments;
47 bus_size_t maxsegsz;
48 int flags;
49 bus_dma_lock_t *lockfunc;
50 void *lockfuncarg;
51 int ref_count;
52 int domain;
53 };
54
55 struct bus_dma_impl {
56 int (*tag_create)(bus_dma_tag_t parent,
57 bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,
58 bus_addr_t highaddr, bus_dma_filter_t *filter,
59 void *filterarg, bus_size_t maxsize, int nsegments,
60 bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
61 void *lockfuncarg, bus_dma_tag_t *dmat);
62 int (*tag_destroy)(bus_dma_tag_t dmat);
63 int (*tag_set_domain)(bus_dma_tag_t);
64 bool (*id_mapped)(bus_dma_tag_t, vm_paddr_t, bus_size_t);
65 int (*map_create)(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
66 int (*map_destroy)(bus_dma_tag_t dmat, bus_dmamap_t map);
67 int (*mem_alloc)(bus_dma_tag_t dmat, void** vaddr, int flags,
68 bus_dmamap_t *mapp);
69 void (*mem_free)(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
70 int (*load_ma)(bus_dma_tag_t dmat, bus_dmamap_t map,
71 struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,
72 bus_dma_segment_t *segs, int *segp);
73 int (*load_phys)(bus_dma_tag_t dmat, bus_dmamap_t map,
74 vm_paddr_t buf, bus_size_t buflen, int flags,
75 bus_dma_segment_t *segs, int *segp);
76 int (*load_buffer)(bus_dma_tag_t dmat, bus_dmamap_t map,
77 void *buf, bus_size_t buflen, struct pmap *pmap, int flags,
78 bus_dma_segment_t *segs, int *segp);
79 void (*map_waitok)(bus_dma_tag_t dmat, bus_dmamap_t map,
80 struct memdesc *mem, bus_dmamap_callback_t *callback,
81 void *callback_arg);
82 bus_dma_segment_t *(*map_complete)(bus_dma_tag_t dmat, bus_dmamap_t map,
83 bus_dma_segment_t *segs, int nsegs, int error);
84 void (*map_unload)(bus_dma_tag_t dmat, bus_dmamap_t map);
85 void (*map_sync)(bus_dma_tag_t dmat, bus_dmamap_t map,
86 bus_dmasync_op_t op);
87 #ifdef KMSAN
88 void (*load_kmsan)(bus_dmamap_t map, struct memdesc *mem);
89 #endif
90 };
91
92 int bus_dma_run_filter(struct bus_dma_tag_common *dmat, vm_paddr_t paddr);
93 int common_bus_dma_tag_create(struct bus_dma_tag_common *parent,
94 bus_size_t alignment,
95 bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,
96 bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize,
97 int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
98 void *lockfuncarg, size_t sz, void **dmat);
99
100 extern struct bus_dma_impl bus_dma_bounce_impl;
101
102 #endif
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