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 56static void 57fwdma_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 67void * 68fwdma_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 107void 108fwdma_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 116void * 117fwdma_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 131void 132fwdma_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 */ 143struct fwdma_alloc_multi * 144fwdma_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 am->ssize = ssize; 164 am->esize = esize; 165 am->nseg = 0; 166 if (bus_dma_tag_create( 167 /*parent*/ fc->dmat, 168 /*alignment*/ alignment, 169 /*boundary*/ 0, 170 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 171 /*highaddr*/ BUS_SPACE_MAXADDR, 172 /*filter*/NULL, /*filterarg*/NULL, 173 /*maxsize*/ ssize, 174 /*nsegments*/ 1, 175 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 176 /*flags*/ BUS_DMA_ALLOCNOW, 177 /*lockfunc*/busdma_lock_mutex, 178 /*lockarg*/FW_GMTX(fc), 179 &am->dma_tag)) { 180 printf("fwdma_malloc_multiseg: tag_create failed\n"); 181 free(am, M_FW); 182 return (NULL); 183 } 184 185 for (seg = &am->seg[0]; nseg--; seg++) { 186 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map, 187 ssize, &seg->bus_addr, flag); 188 if (seg->v_addr == NULL) { 189 printf("fwdma_malloc_multi: malloc_size failed %d\n", 190 am->nseg); 191 fwdma_free_multiseg(am); 192 return (NULL); 193 } 194 am->nseg++; 195 } 196 return (am); 197} 198 199void 200fwdma_free_multiseg(struct fwdma_alloc_multi *am) 201{ 202 struct fwdma_seg *seg; 203 204 for (seg = &am->seg[0]; am->nseg--; seg++) { 205 fwdma_free_size(am->dma_tag, seg->dma_map, 206 seg->v_addr, am->ssize); 207 } 208 bus_dma_tag_destroy(am->dma_tag); 209 free(am, M_FW); 210} 211