1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 2003 5 * Hidetoshi Shimokawa. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * 18 * This product includes software developed by Hidetoshi Shimokawa. 19 * 20 * 4. Neither the name of the author nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 */ 37 38 #ifdef __FreeBSD__ 39 #include <sys/cdefs.h> 40 #endif 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/types.h> 45 #include <sys/kernel.h> 46 #include <sys/malloc.h> 47 #include <sys/lock.h> 48 #include <sys/mutex.h> 49 50 #include <sys/bus.h> 51 #include <machine/bus.h> 52 53 #include <dev/firewire/firewire.h> 54 #include <dev/firewire/firewirereg.h> 55 #include <dev/firewire/fwdma.h> 56 57 static void 58 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 59 { 60 bus_addr_t *baddr; 61 62 if (error) 63 printf("fwdma_map_cb: error=%d\n", error); 64 baddr = (bus_addr_t *)arg; 65 *baddr = segs->ds_addr; 66 } 67 68 void * 69 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size, 70 struct fwdma_alloc *dma, int flag) 71 { 72 int err; 73 74 dma->v_addr = NULL; 75 err = bus_dma_tag_create( 76 /*parent*/ fc->dmat, 77 /*alignment*/ alignment, 78 /*boundary*/ 0, 79 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 80 /*highaddr*/ BUS_SPACE_MAXADDR, 81 /*filter*/NULL, /*filterarg*/NULL, 82 /*maxsize*/ size, 83 /*nsegments*/ 1, 84 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 85 /*flags*/ BUS_DMA_ALLOCNOW, 86 /*lockfunc*/busdma_lock_mutex, 87 /*lockarg*/FW_GMTX(fc), 88 &dma->dma_tag); 89 if (err) { 90 printf("fwdma_malloc: failed(1)\n"); 91 return (NULL); 92 } 93 94 err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr, 95 flag, &dma->dma_map); 96 if (err) { 97 printf("fwdma_malloc: failed(2)\n"); 98 /* XXX destroy tag */ 99 return (NULL); 100 } 101 102 bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr, 103 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0); 104 105 return (dma->v_addr); 106 } 107 108 void 109 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma) 110 { 111 bus_dmamap_unload(dma->dma_tag, dma->dma_map); 112 bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map); 113 bus_dma_tag_destroy(dma->dma_tag); 114 } 115 116 117 void * 118 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap, 119 bus_size_t size, bus_addr_t *bus_addr, int flag) 120 { 121 void *v_addr; 122 123 if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) { 124 printf("fwdma_malloc_size: failed(1)\n"); 125 return (NULL); 126 } 127 bus_dmamap_load(dmat, *dmamap, v_addr, size, 128 fwdma_map_cb, bus_addr, /*flags*/0); 129 return (v_addr); 130 } 131 132 void 133 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap, 134 void *vaddr, bus_size_t size) 135 { 136 bus_dmamap_unload(dmat, dmamap); 137 bus_dmamem_free(dmat, vaddr, dmamap); 138 } 139 140 /* 141 * Allocate multisegment dma buffers 142 * each segment size is eqaul to ssize except last segment. 143 */ 144 struct fwdma_alloc_multi * 145 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment, 146 int esize, int n, int flag) 147 { 148 struct fwdma_alloc_multi *am; 149 struct fwdma_seg *seg; 150 bus_size_t ssize; 151 int nseg; 152 153 if (esize > PAGE_SIZE) { 154 /* round up to PAGE_SIZE */ 155 esize = ssize = roundup2(esize, PAGE_SIZE); 156 nseg = n; 157 } else { 158 /* allocate PAGE_SIZE segment for small elements */ 159 ssize = rounddown(PAGE_SIZE, esize); 160 nseg = howmany(n, ssize / esize); 161 } 162 am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi) 163 + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK); 164 am->ssize = ssize; 165 am->esize = esize; 166 am->nseg = 0; 167 if (bus_dma_tag_create( 168 /*parent*/ fc->dmat, 169 /*alignment*/ alignment, 170 /*boundary*/ 0, 171 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT, 172 /*highaddr*/ BUS_SPACE_MAXADDR, 173 /*filter*/NULL, /*filterarg*/NULL, 174 /*maxsize*/ ssize, 175 /*nsegments*/ 1, 176 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT, 177 /*flags*/ BUS_DMA_ALLOCNOW, 178 /*lockfunc*/busdma_lock_mutex, 179 /*lockarg*/FW_GMTX(fc), 180 &am->dma_tag)) { 181 printf("fwdma_malloc_multiseg: tag_create failed\n"); 182 free(am, M_FW); 183 return (NULL); 184 } 185 186 for (seg = &am->seg[0]; nseg--; seg++) { 187 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map, 188 ssize, &seg->bus_addr, flag); 189 if (seg->v_addr == NULL) { 190 printf("fwdma_malloc_multi: malloc_size failed %d\n", 191 am->nseg); 192 fwdma_free_multiseg(am); 193 return (NULL); 194 } 195 am->nseg++; 196 } 197 return (am); 198 } 199 200 void 201 fwdma_free_multiseg(struct fwdma_alloc_multi *am) 202 { 203 struct fwdma_seg *seg; 204 205 for (seg = &am->seg[0]; am->nseg--; seg++) { 206 fwdma_free_size(am->dma_tag, seg->dma_map, 207 seg->v_addr, am->ssize); 208 } 209 bus_dma_tag_destroy(am->dma_tag); 210 free(am, M_FW); 211 } 212