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 1.1.2.1 2003/04/28 03:29:18 simokawa Exp $
35 * $DragonFly: src/sys/bus/firewire/fwdma.c,v 1.3 2003/08/07 21:16:45 dillon Exp $
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/types.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
44 #include <machine/bus.h>
47 #include "firewirereg.h"
51 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
56 printf("fwdma_map_cb: error=%d\n", error);
57 baddr = (bus_addr_t *)arg;
58 *baddr = segs->ds_addr;
62 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
63 struct fwdma_alloc *dma, int flag)
68 err = bus_dma_tag_create(
70 /*alignment*/ alignment,
72 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
73 /*highaddr*/ BUS_SPACE_MAXADDR,
74 /*filter*/NULL, /*filterarg*/NULL,
77 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
78 /*flags*/ BUS_DMA_ALLOCNOW, &dma->dma_tag);
80 printf("fwdma_malloc: failed(1)\n");
84 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr,
87 printf("fwdma_malloc: failed(2)\n");
92 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr,
93 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0);
99 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
101 bus_dmamap_unload(dma->dma_tag, dma->dma_map);
102 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map);
103 bus_dma_tag_destroy(dma->dma_tag);
108 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
109 bus_size_t size, bus_addr_t *bus_addr, int flag)
113 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
114 printf("fwdma_malloc_size: failed(1)\n");
117 bus_dmamap_load(dmat, *dmamap, v_addr, size,
118 fwdma_map_cb, bus_addr, /*flags*/0);
123 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap,
124 void *vaddr, bus_size_t size)
126 bus_dmamap_unload(dmat, dmamap);
127 bus_dmamem_free(dmat, vaddr, dmamap);
131 * Allocate multisegment dma buffers
132 * each segment size is eqaul to ssize except last segment.
134 struct fwdma_alloc_multi *
135 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
136 int esize, int n, int flag)
138 struct fwdma_alloc_multi *am;
139 struct fwdma_seg *seg;
143 if (esize > PAGE_SIZE) {
144 /* round up to PAGE_SIZE */
145 esize = ssize = roundup2(esize, PAGE_SIZE);
148 /* allocate PAGE_SIZE segment for small elements */
149 ssize = rounddown(PAGE_SIZE, esize);
150 nseg = howmany(n, ssize / esize);
152 am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi)
153 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK);
155 printf("fwdma_malloc_multiseg: malloc failed\n");
161 if (bus_dma_tag_create(
163 /*alignment*/ alignment,
165 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
166 /*highaddr*/ BUS_SPACE_MAXADDR,
167 /*filter*/NULL, /*filterarg*/NULL,
170 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
171 /*flags*/ BUS_DMA_ALLOCNOW, &am->dma_tag)) {
172 printf("fwdma_malloc_multiseg: tag_create failed\n");
178 #if __FreeBSD_version < 500000
179 printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg);
181 printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg);
184 for (seg = &am->seg[0]; nseg --; seg ++) {
185 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map,
186 ssize, &seg->bus_addr, flag);
187 if (seg->v_addr == NULL) {
188 printf("fwdma_malloc_multi: malloc_size failed %d\n",
190 fwdma_free_multiseg(am);
199 fwdma_free_multiseg(struct fwdma_alloc_multi *am)
201 struct fwdma_seg *seg;
203 for (seg = &am->seg[0]; am->nseg --; seg ++) {
204 fwdma_free_size(am->dma_tag, seg->dma_map,
205 seg->v_addr, am->ssize);
207 bus_dma_tag_destroy(am->dma_tag);