3 * Hidetoshi Shimokawa. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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:
16 * This product includes software developed by Hidetoshi Shimokawa.
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.
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
34 * $DragonFly: src/sys/bus/firewire/fwdma.c,v 1.6 2006/09/05 00:55:35 dillon Exp $
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD: src/sys/dev/firewire/fwdma.c,v 1.5 2003/08/24 17:46:07 obrien Exp $");
42 #include <sys/param.h>
43 #include <sys/systm.h>
45 #include <sys/types.h>
46 #include <sys/kernel.h>
47 #include <sys/malloc.h>
48 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
50 #include <sys/mutex.h>
54 #include <machine/bus.h>
57 #include <bus/firewire/firewire.h>
58 #include <bus/firewire/firewirereg.h>
59 #include <bus/firewire/fwdma.h>
61 #include <dev/firewire/firewire.h>
62 #include <dev/firewire/firewirereg.h>
63 #include <dev/firewire/fwdma.h>
67 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
72 printf("fwdma_map_cb: error=%d\n", error);
73 baddr = (bus_addr_t *)arg;
74 *baddr = segs->ds_addr;
78 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
79 struct fwdma_alloc *dma, int flag)
84 err = bus_dma_tag_create(
86 /*alignment*/ alignment,
88 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
89 /*highaddr*/ BUS_SPACE_MAXADDR,
90 /*filter*/NULL, /*filterarg*/NULL,
93 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
94 /*flags*/ BUS_DMA_ALLOCNOW,
95 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
96 /*lockfunc*/busdma_lock_mutex,
101 printf("fwdma_malloc: failed(1)\n");
105 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr,
106 flag, &dma->dma_map);
108 printf("fwdma_malloc: failed(2)\n");
109 /* XXX destory tag */
113 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr,
114 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0);
120 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
122 bus_dmamap_unload(dma->dma_tag, dma->dma_map);
123 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map);
124 bus_dma_tag_destroy(dma->dma_tag);
129 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
130 bus_size_t size, bus_addr_t *bus_addr, int flag)
134 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
135 printf("fwdma_malloc_size: failed(1)\n");
138 bus_dmamap_load(dmat, *dmamap, v_addr, size,
139 fwdma_map_cb, bus_addr, /*flags*/0);
144 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap,
145 void *vaddr, bus_size_t size)
147 bus_dmamap_unload(dmat, dmamap);
148 bus_dmamem_free(dmat, vaddr, dmamap);
152 * Allocate multisegment dma buffers
153 * each segment size is eqaul to ssize except last segment.
155 struct fwdma_alloc_multi *
156 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
157 int esize, int n, int flag)
159 struct fwdma_alloc_multi *am;
160 struct fwdma_seg *seg;
164 if (esize > PAGE_SIZE) {
165 /* round up to PAGE_SIZE */
166 esize = ssize = roundup2(esize, PAGE_SIZE);
169 /* allocate PAGE_SIZE segment for small elements */
170 ssize = rounddown(PAGE_SIZE, esize);
171 nseg = howmany(n, ssize / esize);
173 am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi)
174 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK);
176 printf("fwdma_malloc_multiseg: malloc failed\n");
182 if (bus_dma_tag_create(
184 /*alignment*/ alignment,
186 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
187 /*highaddr*/ BUS_SPACE_MAXADDR,
188 /*filter*/NULL, /*filterarg*/NULL,
191 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
192 /*flags*/ BUS_DMA_ALLOCNOW,
193 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
194 /*lockfunc*/busdma_lock_mutex,
198 printf("fwdma_malloc_multiseg: tag_create failed\n");
204 #if defined(__DragonFly__) || __FreeBSD_version < 500000
205 printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg);
207 printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg);
210 for (seg = &am->seg[0]; nseg --; seg ++) {
211 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map,
212 ssize, &seg->bus_addr, flag);
213 if (seg->v_addr == NULL) {
214 printf("fwdma_malloc_multi: malloc_size failed %d\n",
216 fwdma_free_multiseg(am);
225 fwdma_free_multiseg(struct fwdma_alloc_multi *am)
227 struct fwdma_seg *seg;
229 for (seg = &am->seg[0]; am->nseg --; seg ++) {
230 fwdma_free_size(am->dma_tag, seg->dma_map,
231 seg->v_addr, am->ssize);
233 bus_dma_tag_destroy(am->dma_tag);