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 1.1.2.1 2003/04/28 03:29:18 simokawa Exp $ 35 * $DragonFly: src/sys/bus/firewire/fwdma.c,v 1.3 2003/08/07 21:16:45 dillon Exp $ 36 */ 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/types.h> 40 #include <sys/kernel.h> 41 #include <sys/malloc.h> 42 43 #include <sys/bus.h> 44 #include <machine/bus.h> 45 46 #include "firewire.h" 47 #include "firewirereg.h" 48 #include "fwdma.h" 49 50 static void 51 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 52 { 53 bus_addr_t *baddr; 54 55 if (error) 56 printf("fwdma_map_cb: error=%d\n", error); 57 baddr = (bus_addr_t *)arg; 58 *baddr = segs->ds_addr; 59 } 60 61 void * 62 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size, 63 struct fwdma_alloc *dma, int flag) 64 { 65 int err; 66 67 dma->v_addr = NULL; 68 err = bus_dma_tag_create( 69 /*parent*/ fc->dmat, 70 /*alignment*/ alignment, 71 /*boundary*/ 0, 72 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 73 /*highaddr*/ BUS_SPACE_MAXADDR, 74 /*filter*/NULL, /*filterarg*/NULL, 75 /*maxsize*/ size, 76 /*nsegments*/ 1, 77 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 78 /*flags*/ BUS_DMA_ALLOCNOW, &dma->dma_tag); 79 if (err) { 80 printf("fwdma_malloc: failed(1)\n"); 81 return(NULL); 82 } 83 84 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr, 85 flag, &dma->dma_map); 86 if (err) { 87 printf("fwdma_malloc: failed(2)\n"); 88 /* XXX destory tag */ 89 return(NULL); 90 } 91 92 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr, 93 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0); 94 95 return(dma->v_addr); 96 } 97 98 void 99 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma) 100 { 101 bus_dmamap_unload(dma->dma_tag, dma->dma_map); 102 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map); 103 bus_dma_tag_destroy(dma->dma_tag); 104 } 105 106 107 void * 108 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap, 109 bus_size_t size, bus_addr_t *bus_addr, int flag) 110 { 111 void *v_addr; 112 113 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) { 114 printf("fwdma_malloc_size: failed(1)\n"); 115 return(NULL); 116 } 117 bus_dmamap_load(dmat, *dmamap, v_addr, size, 118 fwdma_map_cb, bus_addr, /*flags*/0); 119 return(v_addr); 120 } 121 122 void 123 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap, 124 void *vaddr, bus_size_t size) 125 { 126 bus_dmamap_unload(dmat, dmamap); 127 bus_dmamem_free(dmat, vaddr, dmamap); 128 } 129 130 /* 131 * Allocate multisegment dma buffers 132 * each segment size is eqaul to ssize except last segment. 133 */ 134 struct fwdma_alloc_multi * 135 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment, 136 int esize, int n, int flag) 137 { 138 struct fwdma_alloc_multi *am; 139 struct fwdma_seg *seg; 140 bus_size_t ssize; 141 int nseg; 142 143 if (esize > PAGE_SIZE) { 144 /* round up to PAGE_SIZE */ 145 esize = ssize = roundup2(esize, PAGE_SIZE); 146 nseg = n; 147 } else { 148 /* allocate PAGE_SIZE segment for small elements */ 149 ssize = rounddown(PAGE_SIZE, esize); 150 nseg = howmany(n, ssize / esize); 151 } 152 am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi) 153 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK); 154 if (am == NULL) { 155 printf("fwdma_malloc_multiseg: malloc failed\n"); 156 return(NULL); 157 } 158 am->ssize = ssize; 159 am->esize = esize; 160 am->nseg = 0; 161 if (bus_dma_tag_create( 162 /*parent*/ fc->dmat, 163 /*alignment*/ alignment, 164 /*boundary*/ 0, 165 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 166 /*highaddr*/ BUS_SPACE_MAXADDR, 167 /*filter*/NULL, /*filterarg*/NULL, 168 /*maxsize*/ ssize, 169 /*nsegments*/ 1, 170 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 171 /*flags*/ BUS_DMA_ALLOCNOW, &am->dma_tag)) { 172 printf("fwdma_malloc_multiseg: tag_create failed\n"); 173 free(am, M_FW); 174 return(NULL); 175 } 176 177 #if 0 178 #if __FreeBSD_version < 500000 179 printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg); 180 #else 181 printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg); 182 #endif 183 #endif 184 for (seg = &am->seg[0]; nseg --; seg ++) { 185 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map, 186 ssize, &seg->bus_addr, flag); 187 if (seg->v_addr == NULL) { 188 printf("fwdma_malloc_multi: malloc_size failed %d\n", 189 am->nseg); 190 fwdma_free_multiseg(am); 191 return(NULL); 192 } 193 am->nseg++; 194 } 195 return(am); 196 } 197 198 void 199 fwdma_free_multiseg(struct fwdma_alloc_multi *am) 200 { 201 struct fwdma_seg *seg; 202 203 for (seg = &am->seg[0]; am->nseg --; seg ++) { 204 fwdma_free_size(am->dma_tag, seg->dma_map, 205 seg->v_addr, am->ssize); 206 } 207 bus_dma_tag_destroy(am->dma_tag); 208 free(am, M_FW); 209 } 210