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 * $FreeBSD: src/sys/dev/firewire/fwdma.c,v 1.5 2003/08/24 17:46:07 obrien Exp $
37 #include <sys/param.h>
38 #include <sys/systm.h>
41 #include <sys/types.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
46 #include <sys/mutex.h>
49 #include <bus/firewire/firewire.h>
50 #include <bus/firewire/firewirereg.h>
51 #include <bus/firewire/fwdma.h>
54 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
59 kprintf("fwdma_map_cb: error=%d\n", error);
60 baddr = (bus_addr_t *)arg;
61 *baddr = segs->ds_addr;
65 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
66 struct fwdma_alloc *dma, int flag)
71 err = bus_dma_tag_create(
73 /*alignment*/ alignment,
75 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
76 /*highaddr*/ BUS_SPACE_MAXADDR,
77 /*filter*/NULL, /*filterarg*/NULL,
80 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
81 /*flags*/ BUS_DMA_ALLOCNOW,
82 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
83 /*lockfunc*/busdma_lock_mutex,
88 kprintf("fwdma_malloc: failed(1)\n");
92 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr,
95 kprintf("fwdma_malloc: failed(2)\n");
100 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr,
101 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0);
107 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
109 bus_dmamap_unload(dma->dma_tag, dma->dma_map);
110 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map);
111 bus_dma_tag_destroy(dma->dma_tag);
116 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
117 bus_size_t size, bus_addr_t *bus_addr, int flag)
121 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
122 kprintf("fwdma_malloc_size: failed(1)\n");
125 bus_dmamap_load(dmat, *dmamap, v_addr, size,
126 fwdma_map_cb, bus_addr, /*flags*/0);
131 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap,
132 void *vaddr, bus_size_t size)
134 bus_dmamap_unload(dmat, dmamap);
135 bus_dmamem_free(dmat, vaddr, dmamap);
139 * Allocate multisegment dma buffers
140 * each segment size is eqaul to ssize except last segment.
142 struct fwdma_alloc_multi *
143 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
144 int esize, int n, int flag)
146 struct fwdma_alloc_multi *am;
147 struct fwdma_seg *seg;
151 if (esize > PAGE_SIZE) {
152 /* round up to PAGE_SIZE */
153 esize = ssize = roundup2(esize, PAGE_SIZE);
156 /* allocate PAGE_SIZE segment for small elements */
157 ssize = rounddown(PAGE_SIZE, esize);
158 nseg = howmany(n, ssize / esize);
160 am = (struct fwdma_alloc_multi *)kmalloc(sizeof(struct fwdma_alloc_multi)
161 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK);
165 if (bus_dma_tag_create(
167 /*alignment*/ alignment,
169 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
170 /*highaddr*/ BUS_SPACE_MAXADDR,
171 /*filter*/NULL, /*filterarg*/NULL,
174 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
175 /*flags*/ BUS_DMA_ALLOCNOW,
176 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
177 /*lockfunc*/busdma_lock_mutex,
181 kprintf("fwdma_malloc_multiseg: tag_create failed\n");
187 kprintf("malloc_multi: ssize=%ld nseg=%d\n", ssize, nseg);
189 for (seg = &am->seg[0]; nseg --; seg ++) {
190 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map,
191 ssize, &seg->bus_addr, flag);
192 if (seg->v_addr == NULL) {
193 kprintf("fwdma_malloc_multi: malloc_size failed %d\n",
195 fwdma_free_multiseg(am);
204 fwdma_free_multiseg(struct fwdma_alloc_multi *am)
206 struct fwdma_seg *seg;
208 for (seg = &am->seg[0]; am->nseg --; seg ++) {
209 fwdma_free_size(am->dma_tag, seg->dma_map,
210 seg->v_addr, am->ssize);
212 bus_dma_tag_destroy(am->dma_tag);