1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1997, 1998 Justin T. Gibbs.
5 * Copyright (c) 2013 The FreeBSD Foundation
6 * All rights reserved.
7 *
8 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
9 * under sponsorship from the FreeBSD Foundation.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification, immediately at the beginning of the file.
17 * 2. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 #include "opt_acpi.h"
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/malloc.h>
39 #include <sys/bus.h>
40 #include <sys/kernel.h>
41 #include <sys/ktr.h>
42 #include <sys/lock.h>
43 #include <sys/memdesc.h>
44 #include <sys/mutex.h>
45 #include <sys/uio.h>
46 #include <sys/vmmeter.h>
47 #include <vm/vm.h>
48 #include <vm/vm_extern.h>
49 #include <vm/vm_param.h>
50 #include <vm/vm_page.h>
51 #include <vm/vm_phys.h>
52 #include <vm/pmap.h>
53 #include <machine/bus.h>
54 #include <x86/include/busdma_impl.h>
55
56 int
common_bus_dma_tag_create(struct bus_dma_tag_common * parent,bus_size_t alignment,bus_addr_t boundary,bus_addr_t lowaddr,bus_addr_t highaddr,bus_size_t maxsize,int nsegments,bus_size_t maxsegsz,int flags,bus_dma_lock_t * lockfunc,void * lockfuncarg,size_t sz,void ** dmat)57 common_bus_dma_tag_create(struct bus_dma_tag_common *parent,
58 bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr,
59 bus_addr_t highaddr, bus_size_t maxsize, int nsegments, bus_size_t maxsegsz,
60 int flags, bus_dma_lock_t *lockfunc, void *lockfuncarg, size_t sz,
61 void **dmat)
62 {
63 void *newtag;
64 struct bus_dma_tag_common *common;
65
66 KASSERT(sz >= sizeof(struct bus_dma_tag_common), ("sz"));
67 /* Basic sanity checking */
68 if (boundary != 0 && boundary < maxsegsz)
69 maxsegsz = boundary;
70 if (maxsegsz == 0)
71 return (EINVAL);
72 /* Return a NULL tag on failure */
73 *dmat = NULL;
74
75 newtag = malloc(sz, M_DEVBUF, M_ZERO | M_NOWAIT);
76 if (newtag == NULL) {
77 CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d",
78 __func__, newtag, 0, ENOMEM);
79 return (ENOMEM);
80 }
81
82 common = newtag;
83 common->impl = &bus_dma_bounce_impl;
84 common->alignment = alignment;
85 common->boundary = boundary;
86 common->lowaddr = trunc_page((vm_paddr_t)lowaddr) + (PAGE_SIZE - 1);
87 common->highaddr = trunc_page((vm_paddr_t)highaddr) + (PAGE_SIZE - 1);
88 common->maxsize = maxsize;
89 common->nsegments = nsegments;
90 common->maxsegsz = maxsegsz;
91 common->flags = flags;
92 if (lockfunc != NULL) {
93 common->lockfunc = lockfunc;
94 common->lockfuncarg = lockfuncarg;
95 } else {
96 common->lockfunc = _busdma_dflt_lock;
97 common->lockfuncarg = NULL;
98 }
99
100 /* Take into account any restrictions imposed by our parent tag */
101 if (parent != NULL) {
102 common->impl = parent->impl;
103 common->lowaddr = MIN(parent->lowaddr, common->lowaddr);
104 common->highaddr = MAX(parent->highaddr, common->highaddr);
105 if (common->boundary == 0)
106 common->boundary = parent->boundary;
107 else if (parent->boundary != 0) {
108 common->boundary = MIN(parent->boundary,
109 common->boundary);
110 }
111
112 common->domain = parent->domain;
113 }
114 common->domain = vm_phys_domain_match(common->domain, 0ul,
115 common->lowaddr);
116 *dmat = common;
117 return (0);
118 }
119
120 int
bus_dma_tag_set_domain(bus_dma_tag_t dmat,int domain)121 bus_dma_tag_set_domain(bus_dma_tag_t dmat, int domain)
122 {
123 struct bus_dma_tag_common *tc;
124
125 tc = (struct bus_dma_tag_common *)dmat;
126 domain = vm_phys_domain_match(domain, 0ul, tc->lowaddr);
127 /* Only call the callback if it changes. */
128 if (domain == tc->domain)
129 return (0);
130 tc->domain = domain;
131 return (tc->impl->tag_set_domain(dmat));
132 }
133
134 /*
135 * Allocate a device specific dma_tag.
136 */
137 int
bus_dma_tag_create(bus_dma_tag_t parent,bus_size_t alignment,bus_addr_t boundary,bus_addr_t lowaddr,bus_addr_t highaddr,bus_dma_filter_t * filter,void * filterarg,bus_size_t maxsize,int nsegments,bus_size_t maxsegsz,int flags,bus_dma_lock_t * lockfunc,void * lockfuncarg,bus_dma_tag_t * dmat)138 bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
139 bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,
140 bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize,
141 int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
142 void *lockfuncarg, bus_dma_tag_t *dmat)
143 {
144 struct bus_dma_tag_common *tc;
145 int error;
146
147 /* Filters are no longer supported. */
148 if (filter != NULL || filterarg != NULL)
149 return (EINVAL);
150
151 if (parent == NULL) {
152 error = bus_dma_bounce_impl.tag_create(parent, alignment,
153 boundary, lowaddr, highaddr, maxsize, nsegments, maxsegsz,
154 flags, lockfunc, lockfuncarg, dmat);
155 } else {
156 tc = (struct bus_dma_tag_common *)parent;
157 error = tc->impl->tag_create(parent, alignment,
158 boundary, lowaddr, highaddr, maxsize, nsegments, maxsegsz,
159 flags, lockfunc, lockfuncarg, dmat);
160 }
161 return (error);
162 }
163
164 void
bus_dma_template_clone(bus_dma_template_t * t,bus_dma_tag_t dmat)165 bus_dma_template_clone(bus_dma_template_t *t, bus_dma_tag_t dmat)
166 {
167 struct bus_dma_tag_common *common;
168
169 if (t == NULL || dmat == NULL)
170 return;
171
172 common = (struct bus_dma_tag_common *)dmat;
173
174 t->alignment = common->alignment;
175 t->boundary = common->boundary;
176 t->lowaddr = common->lowaddr;
177 t->highaddr = common->highaddr;
178 t->maxsize = common->maxsize;
179 t->nsegments = common->nsegments;
180 t->maxsegsize = common->maxsegsz;
181 t->flags = common->flags;
182 t->lockfunc = common->lockfunc;
183 t->lockfuncarg = common->lockfuncarg;
184 }
185
186 int
bus_dma_tag_destroy(bus_dma_tag_t dmat)187 bus_dma_tag_destroy(bus_dma_tag_t dmat)
188 {
189 struct bus_dma_tag_common *tc;
190
191 tc = (struct bus_dma_tag_common *)dmat;
192 return (tc->impl->tag_destroy(dmat));
193 }
194