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 1.10 2008/01/06 16:55:49 swildner 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/bus.h> 46 #include <sys/types.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102 50 #include <sys/lock.h> 51 #include <sys/mutex.h> 52 #endif 53 54 #ifdef __DragonFly__ 55 #include <bus/firewire/firewire.h> 56 #include <bus/firewire/firewirereg.h> 57 #include <bus/firewire/fwdma.h> 58 #else 59 #include <dev/firewire/firewire.h> 60 #include <dev/firewire/firewirereg.h> 61 #include <dev/firewire/fwdma.h> 62 #endif 63 64 static void 65 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 66 { 67 bus_addr_t *baddr; 68 69 if (error) 70 kprintf("fwdma_map_cb: error=%d\n", error); 71 baddr = (bus_addr_t *)arg; 72 *baddr = segs->ds_addr; 73 } 74 75 void * 76 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size, 77 struct fwdma_alloc *dma, int flag) 78 { 79 int err; 80 81 dma->v_addr = NULL; 82 err = bus_dma_tag_create( 83 /*parent*/ fc->dmat, 84 /*alignment*/ alignment, 85 /*boundary*/ 0, 86 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 87 /*highaddr*/ BUS_SPACE_MAXADDR, 88 /*filter*/NULL, /*filterarg*/NULL, 89 /*maxsize*/ size, 90 /*nsegments*/ 1, 91 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 92 /*flags*/ BUS_DMA_ALLOCNOW, 93 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102 94 /*lockfunc*/busdma_lock_mutex, 95 /*lockarg*/&Giant, 96 #endif 97 &dma->dma_tag); 98 if (err) { 99 kprintf("fwdma_malloc: failed(1)\n"); 100 return(NULL); 101 } 102 103 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr, 104 flag, &dma->dma_map); 105 if (err) { 106 kprintf("fwdma_malloc: failed(2)\n"); 107 /* XXX destory tag */ 108 return(NULL); 109 } 110 111 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr, 112 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0); 113 114 return(dma->v_addr); 115 } 116 117 void 118 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma) 119 { 120 bus_dmamap_unload(dma->dma_tag, dma->dma_map); 121 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map); 122 bus_dma_tag_destroy(dma->dma_tag); 123 } 124 125 126 void * 127 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap, 128 bus_size_t size, bus_addr_t *bus_addr, int flag) 129 { 130 void *v_addr; 131 132 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) { 133 kprintf("fwdma_malloc_size: failed(1)\n"); 134 return(NULL); 135 } 136 bus_dmamap_load(dmat, *dmamap, v_addr, size, 137 fwdma_map_cb, bus_addr, /*flags*/0); 138 return(v_addr); 139 } 140 141 void 142 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap, 143 void *vaddr, bus_size_t size) 144 { 145 bus_dmamap_unload(dmat, dmamap); 146 bus_dmamem_free(dmat, vaddr, dmamap); 147 } 148 149 /* 150 * Allocate multisegment dma buffers 151 * each segment size is eqaul to ssize except last segment. 152 */ 153 struct fwdma_alloc_multi * 154 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment, 155 int esize, int n, int flag) 156 { 157 struct fwdma_alloc_multi *am; 158 struct fwdma_seg *seg; 159 bus_size_t ssize; 160 int nseg; 161 162 if (esize > PAGE_SIZE) { 163 /* round up to PAGE_SIZE */ 164 esize = ssize = roundup2(esize, PAGE_SIZE); 165 nseg = n; 166 } else { 167 /* allocate PAGE_SIZE segment for small elements */ 168 ssize = rounddown(PAGE_SIZE, esize); 169 nseg = howmany(n, ssize / esize); 170 } 171 am = (struct fwdma_alloc_multi *)kmalloc(sizeof(struct fwdma_alloc_multi) 172 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK); 173 am->ssize = ssize; 174 am->esize = esize; 175 am->nseg = 0; 176 if (bus_dma_tag_create( 177 /*parent*/ fc->dmat, 178 /*alignment*/ alignment, 179 /*boundary*/ 0, 180 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 181 /*highaddr*/ BUS_SPACE_MAXADDR, 182 /*filter*/NULL, /*filterarg*/NULL, 183 /*maxsize*/ ssize, 184 /*nsegments*/ 1, 185 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 186 /*flags*/ BUS_DMA_ALLOCNOW, 187 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102 188 /*lockfunc*/busdma_lock_mutex, 189 /*lockarg*/&Giant, 190 #endif 191 &am->dma_tag)) { 192 kprintf("fwdma_malloc_multiseg: tag_create failed\n"); 193 kfree(am, M_FW); 194 return(NULL); 195 } 196 197 #if 0 198 #if defined(__DragonFly__) || __FreeBSD_version < 500000 199 kprintf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg); 200 #else 201 kprintf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg); 202 #endif 203 #endif 204 for (seg = &am->seg[0]; nseg --; seg ++) { 205 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map, 206 ssize, &seg->bus_addr, flag); 207 if (seg->v_addr == NULL) { 208 kprintf("fwdma_malloc_multi: malloc_size failed %d\n", 209 am->nseg); 210 fwdma_free_multiseg(am); 211 return(NULL); 212 } 213 am->nseg++; 214 } 215 return(am); 216 } 217 218 void 219 fwdma_free_multiseg(struct fwdma_alloc_multi *am) 220 { 221 struct fwdma_seg *seg; 222 223 for (seg = &am->seg[0]; am->nseg --; seg ++) { 224 fwdma_free_size(am->dma_tag, seg->dma_map, 225 seg->v_addr, am->ssize); 226 } 227 bus_dma_tag_destroy(am->dma_tag); 228 kfree(am, M_FW); 229 } 230