1 /*
2 * Copyright (c) 2003
3 * Hidetoshi Shimokawa. 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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 *
16 * This product includes software developed by Hidetoshi Shimokawa.
17 *
18 * 4. Neither the name of the author nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: src/sys/dev/firewire/fwdma.c,v 1.5 2003/08/24 17:46:07 obrien Exp $
35 */
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/conf.h>
40 #include <sys/bus.h>
41 #include <sys/types.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
45 #include <sys/lock.h>
46 #include <sys/mutex.h>
47 #endif
48
49 #include <bus/firewire/firewire.h>
50 #include <bus/firewire/firewirereg.h>
51 #include <bus/firewire/fwdma.h>
52
53 static void
fwdma_map_cb(void * arg,bus_dma_segment_t * segs,int nseg,int error)54 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
55 {
56 bus_addr_t *baddr;
57
58 if (error)
59 kprintf("fwdma_map_cb: error=%d\n", error);
60 baddr = (bus_addr_t *)arg;
61 *baddr = segs->ds_addr;
62 }
63
64 void *
fwdma_malloc(struct firewire_comm * fc,int alignment,bus_size_t size,struct fwdma_alloc * dma,int flag)65 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
66 struct fwdma_alloc *dma, int flag)
67 {
68 int err;
69
70 dma->v_addr = NULL;
71 err = bus_dma_tag_create(
72 /*parent*/ fc->dmat,
73 /*alignment*/ alignment,
74 /*boundary*/ 0,
75 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
76 /*highaddr*/ BUS_SPACE_MAXADDR,
77 #if defined(__FreeBSD__)
78 /*filter*/NULL, /*filterarg*/NULL,
79 #endif
80 /*maxsize*/ size,
81 /*nsegments*/ 1,
82 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
83 /*flags*/ BUS_DMA_ALLOCNOW,
84 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
85 /*lockfunc*/busdma_lock_mutex,
86 /*lockarg*/&Giant,
87 #endif
88 &dma->dma_tag);
89 if (err) {
90 kprintf("fwdma_malloc: failed(1)\n");
91 return(NULL);
92 }
93
94 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr,
95 flag, &dma->dma_map);
96 if (err) {
97 kprintf("fwdma_malloc: failed(2)\n");
98 /* XXX destory tag */
99 return(NULL);
100 }
101
102 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr,
103 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0);
104
105 return(dma->v_addr);
106 }
107
108 void
fwdma_free(struct firewire_comm * fc,struct fwdma_alloc * dma)109 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
110 {
111 bus_dmamap_unload(dma->dma_tag, dma->dma_map);
112 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map);
113 bus_dma_tag_destroy(dma->dma_tag);
114 }
115
116
117 void *
fwdma_malloc_size(bus_dma_tag_t dmat,bus_dmamap_t * dmamap,bus_size_t size,bus_addr_t * bus_addr,int flag)118 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
119 bus_size_t size, bus_addr_t *bus_addr, int flag)
120 {
121 void *v_addr;
122
123 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
124 kprintf("fwdma_malloc_size: failed(1)\n");
125 return(NULL);
126 }
127 bus_dmamap_load(dmat, *dmamap, v_addr, size,
128 fwdma_map_cb, bus_addr, /*flags*/0);
129 return(v_addr);
130 }
131
132 void
fwdma_free_size(bus_dma_tag_t dmat,bus_dmamap_t dmamap,void * vaddr,bus_size_t size)133 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap,
134 void *vaddr, bus_size_t size)
135 {
136 bus_dmamap_unload(dmat, dmamap);
137 bus_dmamem_free(dmat, vaddr, dmamap);
138 }
139
140 /*
141 * Allocate multisegment dma buffers
142 * each segment size is eqaul to ssize except last segment.
143 */
144 struct fwdma_alloc_multi *
fwdma_malloc_multiseg(struct firewire_comm * fc,int alignment,int esize,int n,int flag)145 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
146 int esize, int n, int flag)
147 {
148 struct fwdma_alloc_multi *am;
149 struct fwdma_seg *seg;
150 bus_size_t ssize;
151 int nseg;
152
153 if (esize > PAGE_SIZE) {
154 /* round up to PAGE_SIZE */
155 esize = ssize = roundup2(esize, PAGE_SIZE);
156 nseg = n;
157 } else {
158 /* allocate PAGE_SIZE segment for small elements */
159 ssize = rounddown(PAGE_SIZE, esize);
160 nseg = howmany(n, ssize / esize);
161 }
162 am = (struct fwdma_alloc_multi *)kmalloc(sizeof(struct fwdma_alloc_multi)
163 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK);
164 am->ssize = ssize;
165 am->esize = esize;
166 am->nseg = 0;
167 if (bus_dma_tag_create(
168 /*parent*/ fc->dmat,
169 /*alignment*/ alignment,
170 /*boundary*/ 0,
171 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
172 /*highaddr*/ BUS_SPACE_MAXADDR,
173 #if defined(__FreeBSD__)
174 /*filter*/NULL, /*filterarg*/NULL,
175 #endif
176 /*maxsize*/ ssize,
177 /*nsegments*/ 1,
178 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
179 /*flags*/ BUS_DMA_ALLOCNOW,
180 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
181 /*lockfunc*/busdma_lock_mutex,
182 /*lockarg*/&Giant,
183 #endif
184 &am->dma_tag)) {
185 kprintf("fwdma_malloc_multiseg: tag_create failed\n");
186 kfree(am, M_FW);
187 return(NULL);
188 }
189
190 #if 0
191 kprintf("malloc_multi: ssize=%ld nseg=%d\n", ssize, nseg);
192 #endif
193 for (seg = &am->seg[0]; nseg --; seg ++) {
194 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map,
195 ssize, &seg->bus_addr, flag);
196 if (seg->v_addr == NULL) {
197 kprintf("fwdma_malloc_multi: malloc_size failed %d\n",
198 am->nseg);
199 fwdma_free_multiseg(am);
200 return(NULL);
201 }
202 am->nseg++;
203 }
204 return(am);
205 }
206
207 void
fwdma_free_multiseg(struct fwdma_alloc_multi * am)208 fwdma_free_multiseg(struct fwdma_alloc_multi *am)
209 {
210 struct fwdma_seg *seg;
211
212 for (seg = &am->seg[0]; am->nseg --; seg ++) {
213 fwdma_free_size(am->dma_tag, seg->dma_map,
214 seg->v_addr, am->ssize);
215 }
216 bus_dma_tag_destroy(am->dma_tag);
217 kfree(am, M_FW);
218 }
219