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 */ 35 36 #ifdef __FreeBSD__ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 #endif 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/types.h> 44 #include <sys/kernel.h> 45 #include <sys/malloc.h> 46 #include <sys/lock.h> 47 #include <sys/mutex.h> 48 49 #include <sys/bus.h> 50 #include <machine/bus.h> 51 52 #include <dev/firewire/firewire.h> 53 #include <dev/firewire/firewirereg.h> 54 #include <dev/firewire/fwdma.h> 55 56 static void 57 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 58 { 59 bus_addr_t *baddr; 60 61 if (error) 62 printf("fwdma_map_cb: error=%d\n", error); 63 baddr = (bus_addr_t *)arg; 64 *baddr = segs->ds_addr; 65 } 66 67 void * 68 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size, 69 struct fwdma_alloc *dma, int flag) 70 { 71 int err; 72 73 dma->v_addr = NULL; 74 err = bus_dma_tag_create( 75 /*parent*/ fc->dmat, 76 /*alignment*/ alignment, 77 /*boundary*/ 0, 78 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 79 /*highaddr*/ BUS_SPACE_MAXADDR, 80 /*filter*/NULL, /*filterarg*/NULL, 81 /*maxsize*/ size, 82 /*nsegments*/ 1, 83 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 84 /*flags*/ BUS_DMA_ALLOCNOW, 85 /*lockfunc*/busdma_lock_mutex, 86 /*lockarg*/FW_GMTX(fc), 87 &dma->dma_tag); 88 if (err) { 89 printf("fwdma_malloc: failed(1)\n"); 90 return (NULL); 91 } 92 93 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr, 94 flag, &dma->dma_map); 95 if (err) { 96 printf("fwdma_malloc: failed(2)\n"); 97 /* XXX destroy tag */ 98 return (NULL); 99 } 100 101 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr, 102 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0); 103 104 return (dma->v_addr); 105 } 106 107 void 108 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma) 109 { 110 bus_dmamap_unload(dma->dma_tag, dma->dma_map); 111 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map); 112 bus_dma_tag_destroy(dma->dma_tag); 113 } 114 115 116 void * 117 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap, 118 bus_size_t size, bus_addr_t *bus_addr, int flag) 119 { 120 void *v_addr; 121 122 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) { 123 printf("fwdma_malloc_size: failed(1)\n"); 124 return (NULL); 125 } 126 bus_dmamap_load(dmat, *dmamap, v_addr, size, 127 fwdma_map_cb, bus_addr, /*flags*/0); 128 return (v_addr); 129 } 130 131 void 132 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap, 133 void *vaddr, bus_size_t size) 134 { 135 bus_dmamap_unload(dmat, dmamap); 136 bus_dmamem_free(dmat, vaddr, dmamap); 137 } 138 139 /* 140 * Allocate multisegment dma buffers 141 * each segment size is eqaul to ssize except last segment. 142 */ 143 struct fwdma_alloc_multi * 144 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment, 145 int esize, int n, int flag) 146 { 147 struct fwdma_alloc_multi *am; 148 struct fwdma_seg *seg; 149 bus_size_t ssize; 150 int nseg; 151 152 if (esize > PAGE_SIZE) { 153 /* round up to PAGE_SIZE */ 154 esize = ssize = roundup2(esize, PAGE_SIZE); 155 nseg = n; 156 } else { 157 /* allocate PAGE_SIZE segment for small elements */ 158 ssize = rounddown(PAGE_SIZE, esize); 159 nseg = howmany(n, ssize / esize); 160 } 161 am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi) 162 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK); 163 if (am == NULL) { 164 printf("fwdma_malloc_multiseg: malloc failed\n"); 165 return (NULL); 166 } 167 am->ssize = ssize; 168 am->esize = esize; 169 am->nseg = 0; 170 if (bus_dma_tag_create( 171 /*parent*/ fc->dmat, 172 /*alignment*/ alignment, 173 /*boundary*/ 0, 174 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 175 /*highaddr*/ BUS_SPACE_MAXADDR, 176 /*filter*/NULL, /*filterarg*/NULL, 177 /*maxsize*/ ssize, 178 /*nsegments*/ 1, 179 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 180 /*flags*/ BUS_DMA_ALLOCNOW, 181 /*lockfunc*/busdma_lock_mutex, 182 /*lockarg*/FW_GMTX(fc), 183 &am->dma_tag)) { 184 printf("fwdma_malloc_multiseg: tag_create failed\n"); 185 free(am, M_FW); 186 return (NULL); 187 } 188 189 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 printf("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 free(am, M_FW); 214 } 215