fwdma.c revision 119418
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 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/dev/firewire/fwdma.c 119418 2003-08-24 17:55:58Z obrien $"); 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/types.h> 41#include <sys/kernel.h> 42#include <sys/malloc.h> 43#if __FreeBSD_version >= 501102 44#include <sys/lock.h> 45#include <sys/mutex.h> 46#endif 47 48#include <sys/bus.h> 49#include <machine/bus.h> 50 51#include <dev/firewire/firewire.h> 52#include <dev/firewire/firewirereg.h> 53#include <dev/firewire/fwdma.h> 54 55static void 56fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 57{ 58 bus_addr_t *baddr; 59 60 if (error) 61 printf("fwdma_map_cb: error=%d\n", error); 62 baddr = (bus_addr_t *)arg; 63 *baddr = segs->ds_addr; 64} 65 66void * 67fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size, 68 struct fwdma_alloc *dma, int flag) 69{ 70 int err; 71 72 dma->v_addr = NULL; 73 err = bus_dma_tag_create( 74 /*parent*/ fc->dmat, 75 /*alignment*/ alignment, 76 /*boundary*/ 0, 77 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 78 /*highaddr*/ BUS_SPACE_MAXADDR, 79 /*filter*/NULL, /*filterarg*/NULL, 80 /*maxsize*/ size, 81 /*nsegments*/ 1, 82 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 83 /*flags*/ BUS_DMA_ALLOCNOW, 84#if __FreeBSD_version >= 501102 85 /*lockfunc*/busdma_lock_mutex, 86 /*lockarg*/&Giant, 87#endif 88 &dma->dma_tag); 89 if (err) { 90 printf("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 printf("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 108void 109fwdma_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 117void * 118fwdma_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 printf("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 132void 133fwdma_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 */ 144struct fwdma_alloc_multi * 145fwdma_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 *)malloc(sizeof(struct fwdma_alloc_multi) 163 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK); 164 if (am == NULL) { 165 printf("fwdma_malloc_multiseg: malloc failed\n"); 166 return(NULL); 167 } 168 am->ssize = ssize; 169 am->esize = esize; 170 am->nseg = 0; 171 if (bus_dma_tag_create( 172 /*parent*/ fc->dmat, 173 /*alignment*/ alignment, 174 /*boundary*/ 0, 175 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 176 /*highaddr*/ BUS_SPACE_MAXADDR, 177 /*filter*/NULL, /*filterarg*/NULL, 178 /*maxsize*/ ssize, 179 /*nsegments*/ 1, 180 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 181 /*flags*/ BUS_DMA_ALLOCNOW, 182#if __FreeBSD_version >= 501102 183 /*lockfunc*/busdma_lock_mutex, 184 /*lockarg*/&Giant, 185#endif 186 &am->dma_tag)) { 187 printf("fwdma_malloc_multiseg: tag_create failed\n"); 188 free(am, M_FW); 189 return(NULL); 190 } 191 192#if 0 193#if __FreeBSD_version < 500000 194 printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg); 195#else 196 printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg); 197#endif 198#endif 199 for (seg = &am->seg[0]; nseg --; seg ++) { 200 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map, 201 ssize, &seg->bus_addr, flag); 202 if (seg->v_addr == NULL) { 203 printf("fwdma_malloc_multi: malloc_size failed %d\n", 204 am->nseg); 205 fwdma_free_multiseg(am); 206 return(NULL); 207 } 208 am->nseg++; 209 } 210 return(am); 211} 212 213void 214fwdma_free_multiseg(struct fwdma_alloc_multi *am) 215{ 216 struct fwdma_seg *seg; 217 218 for (seg = &am->seg[0]; am->nseg --; seg ++) { 219 fwdma_free_size(am->dma_tag, seg->dma_map, 220 seg->v_addr, am->ssize); 221 } 222 bus_dma_tag_destroy(am->dma_tag); 223 free(am, M_FW); 224} 225