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