1 /*-
2 * Copyright (c) 2017 Jason A. Harmening.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29 #ifndef _X86_BUS_DMA_H_
30 #define _X86_BUS_DMA_H_
31
32 #define WANT_INLINE_DMAMAP
33 #include <sys/bus_dma.h>
34 #include <sys/_null.h>
35
36 #include <x86/busdma_impl.h>
37
38 /*
39 * Is DMA address 1:1 mapping of physical address
40 */
41 static inline bool
42 bus_dma_id_mapped(bus_dma_tag_t dmat, vm_paddr_t buf, bus_size_t buflen)
43 {
44 struct bus_dma_tag_common *tc;
45
46 tc = (struct bus_dma_tag_common *)dmat;
47 return (tc->impl->id_mapped(dmat, buf, buflen));
48 }
49
50 /*
51 * Allocate a handle for mapping from kva/uva/physical
52 * address space into bus device space.
53 */
54 static inline int
55 bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
56 {
57 struct bus_dma_tag_common *tc;
58
59 tc = (struct bus_dma_tag_common *)dmat;
60 return (tc->impl->map_create(dmat, flags, mapp));
61 }
62
63 /*
64 * Destroy a handle for mapping from kva/uva/physical
65 * address space into bus device space.
66 */
67 static inline int
68 bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map)
69 {
70 struct bus_dma_tag_common *tc;
71
72 tc = (struct bus_dma_tag_common *)dmat;
73 return (tc->impl->map_destroy(dmat, map));
74 }
75
76 /*
77 * Allocate a piece of memory that can be efficiently mapped into
78 * bus device space based on the constraints lited in the dma tag.
79 * A dmamap to for use with dmamap_load is also allocated.
80 */
81 static inline int
82 bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
83 bus_dmamap_t *mapp)
84 {
85 struct bus_dma_tag_common *tc;
86
87 tc = (struct bus_dma_tag_common *)dmat;
88 return (tc->impl->mem_alloc(dmat, vaddr, flags, mapp));
89 }
90
91 /*
92 * Free a piece of memory and it's allociated dmamap, that was allocated
93 * via bus_dmamem_alloc. Make the same choice for free/contigfree.
94 */
95 static inline void
96 bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map)
97 {
98 struct bus_dma_tag_common *tc;
99
100 tc = (struct bus_dma_tag_common *)dmat;
101 tc->impl->mem_free(dmat, vaddr, map);
102 }
103
104 /*
105 * Release the mapping held by map.
106 */
107 static inline void
108 bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
109 {
110 struct bus_dma_tag_common *tc;
111
112 if (map != NULL) {
113 tc = (struct bus_dma_tag_common *)dmat;
114 tc->impl->map_unload(dmat, map);
115 }
116 }
117
118 static inline void
119 bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
120 {
121 struct bus_dma_tag_common *tc;
122
123 if (map != NULL) {
124 tc = (struct bus_dma_tag_common *)dmat;
125 tc->impl->map_sync(dmat, map, op);
126 }
127 }
128
129 /*
130 * Utility function to load a physical buffer. segp contains
131 * the starting segment on entrace, and the ending segment on exit.
132 */
133 static inline int
134 _bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t buf,
135 bus_size_t buflen, int flags, bus_dma_segment_t *segs, int *segp)
136 {
137 struct bus_dma_tag_common *tc;
138
139 tc = (struct bus_dma_tag_common *)dmat;
140 return (tc->impl->load_phys(dmat, map, buf, buflen, flags, segs,
141 segp));
142 }
143
144 static inline int
145 _bus_dmamap_load_ma(bus_dma_tag_t dmat, bus_dmamap_t map, struct vm_page **ma,
146 bus_size_t tlen, int ma_offs, int flags, bus_dma_segment_t *segs,
147 int *segp)
148 {
149 struct bus_dma_tag_common *tc;
150
151 tc = (struct bus_dma_tag_common *)dmat;
152 return (tc->impl->load_ma(dmat, map, ma, tlen, ma_offs, flags,
153 segs, segp));
154 }
155
156 /*
157 * Utility function to load a linear buffer. segp contains
158 * the starting segment on entrace, and the ending segment on exit.
159 */
160 static inline int
161 _bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
162 bus_size_t buflen, struct pmap *pmap, int flags, bus_dma_segment_t *segs,
163 int *segp)
164 {
165 struct bus_dma_tag_common *tc;
166
167 tc = (struct bus_dma_tag_common *)dmat;
168 return (tc->impl->load_buffer(dmat, map, buf, buflen, pmap, flags, segs,
169 segp));
170 }
171
172 static inline void
173 _bus_dmamap_waitok(bus_dma_tag_t dmat, bus_dmamap_t map,
174 struct memdesc *mem, bus_dmamap_callback_t *callback, void *callback_arg)
175 {
176 struct bus_dma_tag_common *tc;
177
178 if (map != NULL) {
179 tc = (struct bus_dma_tag_common *)dmat;
180 tc->impl->map_waitok(dmat, map, mem, callback, callback_arg);
181 }
182 }
183
184 static inline bus_dma_segment_t *
185 _bus_dmamap_complete(bus_dma_tag_t dmat, bus_dmamap_t map,
186 bus_dma_segment_t *segs, int nsegs, int error)
187 {
188 struct bus_dma_tag_common *tc;
189
190 tc = (struct bus_dma_tag_common *)dmat;
191 return (tc->impl->map_complete(dmat, map, segs, nsegs, error));
192 }
193
194 #ifdef _KERNEL
195 bool bus_dma_dmar_set_buswide(device_t dev);
196 int bus_dma_dmar_load_ident(bus_dma_tag_t dmat, bus_dmamap_t map,
197 vm_paddr_t start, vm_size_t length, int flags);
198 #endif
199
200 #endif /* !_X86_BUS_DMA_H_ */
201
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