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 * $DragonFly: src/sys/bus/firewire/fwdma.c,v 1.5 2004/02/05 17:51:43 joerg Exp $ 35 */ 36 37 #ifndef __DragonFly__ 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 $"); 40 #endif 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/conf.h> 45 #include <sys/types.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102 49 #include <sys/lock.h> 50 #include <sys/mutex.h> 51 #endif 52 53 #include <sys/bus.h> 54 #include <machine/bus.h> 55 56 #ifdef __DragonFly__ 57 #include <bus/firewire/firewire.h> 58 #include <bus/firewire/firewirereg.h> 59 #include <bus/firewire/fwdma.h> 60 #else 61 #include <dev/firewire/firewire.h> 62 #include <dev/firewire/firewirereg.h> 63 #include <dev/firewire/fwdma.h> 64 #endif 65 66 static void 67 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 68 { 69 bus_addr_t *baddr; 70 71 if (error) 72 printf("fwdma_map_cb: error=%d\n", error); 73 baddr = (bus_addr_t *)arg; 74 *baddr = segs->ds_addr; 75 } 76 77 void * 78 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size, 79 struct fwdma_alloc *dma, int flag) 80 { 81 int err; 82 83 dma->v_addr = NULL; 84 err = bus_dma_tag_create( 85 /*parent*/ fc->dmat, 86 /*alignment*/ alignment, 87 /*boundary*/ 0, 88 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 89 /*highaddr*/ BUS_SPACE_MAXADDR, 90 /*filter*/NULL, /*filterarg*/NULL, 91 /*maxsize*/ size, 92 /*nsegments*/ 1, 93 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 94 /*flags*/ BUS_DMA_ALLOCNOW, 95 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102 96 /*lockfunc*/busdma_lock_mutex, 97 /*lockarg*/&Giant, 98 #endif 99 &dma->dma_tag); 100 if (err) { 101 printf("fwdma_malloc: failed(1)\n"); 102 return(NULL); 103 } 104 105 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr, 106 flag, &dma->dma_map); 107 if (err) { 108 printf("fwdma_malloc: failed(2)\n"); 109 /* XXX destory tag */ 110 return(NULL); 111 } 112 113 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr, 114 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0); 115 116 return(dma->v_addr); 117 } 118 119 void 120 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma) 121 { 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); 125 } 126 127 128 void * 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) 131 { 132 void *v_addr; 133 134 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) { 135 printf("fwdma_malloc_size: failed(1)\n"); 136 return(NULL); 137 } 138 bus_dmamap_load(dmat, *dmamap, v_addr, size, 139 fwdma_map_cb, bus_addr, /*flags*/0); 140 return(v_addr); 141 } 142 143 void 144 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap, 145 void *vaddr, bus_size_t size) 146 { 147 bus_dmamap_unload(dmat, dmamap); 148 bus_dmamem_free(dmat, vaddr, dmamap); 149 } 150 151 /* 152 * Allocate multisegment dma buffers 153 * each segment size is eqaul to ssize except last segment. 154 */ 155 struct fwdma_alloc_multi * 156 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment, 157 int esize, int n, int flag) 158 { 159 struct fwdma_alloc_multi *am; 160 struct fwdma_seg *seg; 161 bus_size_t ssize; 162 int nseg; 163 164 if (esize > PAGE_SIZE) { 165 /* round up to PAGE_SIZE */ 166 esize = ssize = roundup2(esize, PAGE_SIZE); 167 nseg = n; 168 } else { 169 /* allocate PAGE_SIZE segment for small elements */ 170 ssize = rounddown(PAGE_SIZE, esize); 171 nseg = howmany(n, ssize / esize); 172 } 173 am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi) 174 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK); 175 if (am == NULL) { 176 printf("fwdma_malloc_multiseg: malloc failed\n"); 177 return(NULL); 178 } 179 am->ssize = ssize; 180 am->esize = esize; 181 am->nseg = 0; 182 if (bus_dma_tag_create( 183 /*parent*/ fc->dmat, 184 /*alignment*/ alignment, 185 /*boundary*/ 0, 186 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 187 /*highaddr*/ BUS_SPACE_MAXADDR, 188 /*filter*/NULL, /*filterarg*/NULL, 189 /*maxsize*/ ssize, 190 /*nsegments*/ 1, 191 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 192 /*flags*/ BUS_DMA_ALLOCNOW, 193 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102 194 /*lockfunc*/busdma_lock_mutex, 195 /*lockarg*/&Giant, 196 #endif 197 &am->dma_tag)) { 198 printf("fwdma_malloc_multiseg: tag_create failed\n"); 199 free(am, M_FW); 200 return(NULL); 201 } 202 203 #if 0 204 #if defined(__DragonFly__) || __FreeBSD_version < 500000 205 printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg); 206 #else 207 printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg); 208 #endif 209 #endif 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", 215 am->nseg); 216 fwdma_free_multiseg(am); 217 return(NULL); 218 } 219 am->nseg++; 220 } 221 return(am); 222 } 223 224 void 225 fwdma_free_multiseg(struct fwdma_alloc_multi *am) 226 { 227 struct fwdma_seg *seg; 228 229 for (seg = &am->seg[0]; am->nseg --; seg ++) { 230 fwdma_free_size(am->dma_tag, seg->dma_map, 231 seg->v_addr, am->ssize); 232 } 233 bus_dma_tag_destroy(am->dma_tag); 234 free(am, M_FW); 235 } 236