1 /* $NetBSD: bus_stubs.c,v 1.3 2021/09/18 09:49:57 jmcneill Exp $ */
2
3 /*
4 * Copyright (c) 2020 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Maxime Villard.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: bus_stubs.c,v 1.3 2021/09/18 09:49:57 jmcneill Exp $");
34
35 #include <sys/systm.h>
36 #include <sys/asan.h>
37 #include <sys/bus.h>
38 #include <sys/bus_proto.h>
39
40 bool
bus_space_is_equal(bus_space_tag_t t1,bus_space_tag_t t2)41 bus_space_is_equal(bus_space_tag_t t1, bus_space_tag_t t2)
42 {
43 if (t1 == t2) {
44 return true;
45 }
46
47 return t1 != NULL && t2 != NULL && t1->bs_cookie == t2->bs_cookie;
48 }
49
50 int
bus_dmamap_create(bus_dma_tag_t t,bus_size_t size,int nsegments,bus_size_t maxsegsz,bus_size_t boundary,int flags,bus_dmamap_t * dmamp)51 bus_dmamap_create(bus_dma_tag_t t, bus_size_t size, int nsegments,
52 bus_size_t maxsegsz, bus_size_t boundary, int flags, bus_dmamap_t *dmamp)
53 {
54 return (*t->_dmamap_create)(t, size, nsegments, maxsegsz, boundary,
55 flags, dmamp);
56 }
57
58 void
bus_dmamap_destroy(bus_dma_tag_t t,bus_dmamap_t dmam)59 bus_dmamap_destroy(bus_dma_tag_t t, bus_dmamap_t dmam)
60 {
61 (*t->_dmamap_destroy)(t, dmam);
62 }
63
64 int
bus_dmamap_load(bus_dma_tag_t t,bus_dmamap_t dmam,void * buf,bus_size_t buflen,struct proc * p,int flags)65 bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t dmam, void *buf,
66 bus_size_t buflen, struct proc *p, int flags)
67 {
68 kasan_dma_load(dmam, buf, buflen, KASAN_DMA_LINEAR);
69 return (*t->_dmamap_load)(t, dmam, buf, buflen, p, flags);
70 }
71
72 int
bus_dmamap_load_mbuf(bus_dma_tag_t t,bus_dmamap_t dmam,struct mbuf * chain,int flags)73 bus_dmamap_load_mbuf(bus_dma_tag_t t, bus_dmamap_t dmam, struct mbuf *chain,
74 int flags)
75 {
76 kasan_dma_load(dmam, chain, 0, KASAN_DMA_MBUF);
77 return (*t->_dmamap_load_mbuf)(t, dmam, chain, flags);
78 }
79
80 int
bus_dmamap_load_uio(bus_dma_tag_t t,bus_dmamap_t dmam,struct uio * uio,int flags)81 bus_dmamap_load_uio(bus_dma_tag_t t, bus_dmamap_t dmam, struct uio *uio,
82 int flags)
83 {
84 kasan_dma_load(dmam, uio, 0, KASAN_DMA_UIO);
85 return (*t->_dmamap_load_uio)(t, dmam, uio, flags);
86 }
87
88 int
bus_dmamap_load_raw(bus_dma_tag_t t,bus_dmamap_t dmam,bus_dma_segment_t * segs,int nsegs,bus_size_t size,int flags)89 bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t dmam, bus_dma_segment_t *segs,
90 int nsegs, bus_size_t size, int flags)
91 {
92 return (*t->_dmamap_load_raw)(t, dmam, segs, nsegs, size, flags);
93 }
94
95 void
bus_dmamap_unload(bus_dma_tag_t t,bus_dmamap_t dmam)96 bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t dmam)
97 {
98 (*t->_dmamap_unload)(t, dmam);
99 }
100
101 void
bus_dmamap_sync(bus_dma_tag_t t,bus_dmamap_t p,bus_addr_t o,bus_size_t l,int ops)102 bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t p, bus_addr_t o, bus_size_t l,
103 int ops)
104 {
105 kasan_dma_sync(p, o, l, ops);
106
107 if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 &&
108 t->_dmamap_sync_pre != NULL)
109 (*t->_dmamap_sync_pre)(t, p, o, l, ops);
110 else if ((ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0 &&
111 t->_dmamap_sync_post != NULL)
112 (*t->_dmamap_sync_post)(t, p, o, l, ops);
113 }
114