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 * $FreeBSD: src/sys/dev/firewire/fwdma.c,v 1.5 2003/08/24 17:46:07 obrien Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/conf.h> 40 #include <sys/bus.h> 41 #include <sys/types.h> 42 #include <sys/kernel.h> 43 #include <sys/malloc.h> 44 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102 45 #include <sys/lock.h> 46 #include <sys/mutex.h> 47 #endif 48 49 #ifdef __DragonFly__ 50 #include <bus/firewire/firewire.h> 51 #include <bus/firewire/firewirereg.h> 52 #include <bus/firewire/fwdma.h> 53 #else 54 #include <dev/firewire/firewire.h> 55 #include <dev/firewire/firewirereg.h> 56 #include <dev/firewire/fwdma.h> 57 #endif 58 59 static void 60 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 61 { 62 bus_addr_t *baddr; 63 64 if (error) 65 kprintf("fwdma_map_cb: error=%d\n", error); 66 baddr = (bus_addr_t *)arg; 67 *baddr = segs->ds_addr; 68 } 69 70 void * 71 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size, 72 struct fwdma_alloc *dma, int flag) 73 { 74 int err; 75 76 dma->v_addr = NULL; 77 err = bus_dma_tag_create( 78 /*parent*/ fc->dmat, 79 /*alignment*/ alignment, 80 /*boundary*/ 0, 81 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 82 /*highaddr*/ BUS_SPACE_MAXADDR, 83 /*filter*/NULL, /*filterarg*/NULL, 84 /*maxsize*/ size, 85 /*nsegments*/ 1, 86 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 87 /*flags*/ BUS_DMA_ALLOCNOW, 88 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102 89 /*lockfunc*/busdma_lock_mutex, 90 /*lockarg*/&Giant, 91 #endif 92 &dma->dma_tag); 93 if (err) { 94 kprintf("fwdma_malloc: failed(1)\n"); 95 return(NULL); 96 } 97 98 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr, 99 flag, &dma->dma_map); 100 if (err) { 101 kprintf("fwdma_malloc: failed(2)\n"); 102 /* XXX destory tag */ 103 return(NULL); 104 } 105 106 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr, 107 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0); 108 109 return(dma->v_addr); 110 } 111 112 void 113 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma) 114 { 115 bus_dmamap_unload(dma->dma_tag, dma->dma_map); 116 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map); 117 bus_dma_tag_destroy(dma->dma_tag); 118 } 119 120 121 void * 122 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap, 123 bus_size_t size, bus_addr_t *bus_addr, int flag) 124 { 125 void *v_addr; 126 127 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) { 128 kprintf("fwdma_malloc_size: failed(1)\n"); 129 return(NULL); 130 } 131 bus_dmamap_load(dmat, *dmamap, v_addr, size, 132 fwdma_map_cb, bus_addr, /*flags*/0); 133 return(v_addr); 134 } 135 136 void 137 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap, 138 void *vaddr, bus_size_t size) 139 { 140 bus_dmamap_unload(dmat, dmamap); 141 bus_dmamem_free(dmat, vaddr, dmamap); 142 } 143 144 /* 145 * Allocate multisegment dma buffers 146 * each segment size is eqaul to ssize except last segment. 147 */ 148 struct fwdma_alloc_multi * 149 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment, 150 int esize, int n, int flag) 151 { 152 struct fwdma_alloc_multi *am; 153 struct fwdma_seg *seg; 154 bus_size_t ssize; 155 int nseg; 156 157 if (esize > PAGE_SIZE) { 158 /* round up to PAGE_SIZE */ 159 esize = ssize = roundup2(esize, PAGE_SIZE); 160 nseg = n; 161 } else { 162 /* allocate PAGE_SIZE segment for small elements */ 163 ssize = rounddown(PAGE_SIZE, esize); 164 nseg = howmany(n, ssize / esize); 165 } 166 am = (struct fwdma_alloc_multi *)kmalloc(sizeof(struct fwdma_alloc_multi) 167 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK); 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 defined(__FreeBSD__) && __FreeBSD_version >= 501102 183 /*lockfunc*/busdma_lock_mutex, 184 /*lockarg*/&Giant, 185 #endif 186 &am->dma_tag)) { 187 kprintf("fwdma_malloc_multiseg: tag_create failed\n"); 188 kfree(am, M_FW); 189 return(NULL); 190 } 191 192 #if 0 193 #if defined(__DragonFly__) || __FreeBSD_version < 500000 194 kprintf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg); 195 #else 196 kprintf("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 kprintf("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 } 212 213 void 214 fwdma_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 kfree(am, M_FW); 224 } 225