sys/bus/firewire/fwdma.c

   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  * $DragonFly: src/sys/bus/firewire/fwdma.c,v 1.10 2008/01/06 16:55:49 swildner Exp $
  35  */
  36
  37 #ifndef __DragonFly__
  38 #include <sys/cdefs.h>
  39 __FBSDID("$FreeBSD: src/sys/dev/firewire/fwdma.c,v 1.5 2003/08/24 17:46:07 obrien Exp $");
  40 #endif
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/conf.h>
  45 #include <sys/bus.h>
  46 #include <sys/types.h>
  47 #include <sys/kernel.h>
  48 #include <sys/malloc.h>
  49 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
  50 #include <sys/lock.h>
  51 #include <sys/mutex.h>
  52 #endif
  53
  54 #ifdef __DragonFly__
  55 #include <bus/firewire/firewire.h>
  56 #include <bus/firewire/firewirereg.h>
  57 #include <bus/firewire/fwdma.h>
  58 #else
  59 #include <dev/firewire/firewire.h>
  60 #include <dev/firewire/firewirereg.h>
  61 #include <dev/firewire/fwdma.h>
  62 #endif
  63
  64 static void
  65 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
  66 {
  67         bus_addr_t *baddr;
  68
  69         if (error)
  70                 kprintf("fwdma_map_cb: error=%d\n", error);
  71         baddr = (bus_addr_t *)arg;
  72         *baddr = segs->ds_addr;
  73 }
  74
  75 void *
  76 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
  77         struct fwdma_alloc *dma, int flag)
  78 {
  79         int err;
  80
  81         dma->v_addr = NULL;
  82         err = bus_dma_tag_create(
  83                 /*parent*/ fc->dmat,
  84                 /*alignment*/ alignment,
  85                 /*boundary*/ 0,
  86                 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
  87                 /*highaddr*/ BUS_SPACE_MAXADDR,
  88                 /*filter*/NULL, /*filterarg*/NULL,
  89                 /*maxsize*/ size,
  90                 /*nsegments*/ 1,
  91                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
  92                 /*flags*/ BUS_DMA_ALLOCNOW,
  93 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
  94                 /*lockfunc*/busdma_lock_mutex,
  95                 /*lockarg*/&Giant,
  96 #endif
  97                 &dma->dma_tag);
  98         if (err) {
  99                 kprintf("fwdma_malloc: failed(1)\n");
 100                 return(NULL);
 101         }
 102
 103         err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr,
 104                 flag, &dma->dma_map);
 105         if (err) {
 106                 kprintf("fwdma_malloc: failed(2)\n");
 107                 /* XXX destory tag */
 108                 return(NULL);
 109         }
 110
 111         bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr,
 112                 size, fwdma_map_cb, &dma->bus_addr, /*flags*/0);
 113
 114         return(dma->v_addr);
 115 }
 116
 117 void
 118 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
 119 {
 120         bus_dmamap_unload(dma->dma_tag, dma->dma_map);
 121         bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map);
 122         bus_dma_tag_destroy(dma->dma_tag);
 123 }
 124
 125
 126 void *
 127 fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
 128         bus_size_t size, bus_addr_t *bus_addr, int flag)
 129 {
 130         void *v_addr;
 131
 132         if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
 133                 kprintf("fwdma_malloc_size: failed(1)\n");
 134                 return(NULL);
 135         }
 136         bus_dmamap_load(dmat, *dmamap, v_addr, size,
 137                         fwdma_map_cb, bus_addr, /*flags*/0);
 138         return(v_addr);
 139 }
 140
 141 void
 142 fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap,
 143                 void *vaddr, bus_size_t size)
 144 {
 145         bus_dmamap_unload(dmat, dmamap);
 146         bus_dmamem_free(dmat, vaddr, dmamap);
 147 }
 148
 149 /*
 150  * Allocate multisegment dma buffers
 151  * each segment size is eqaul to ssize except last segment.
 152  */
 153 struct fwdma_alloc_multi *
 154 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
 155                 int esize, int n, int flag)
 156 {
 157         struct fwdma_alloc_multi *am;
 158         struct fwdma_seg *seg;
 159         bus_size_t ssize;
 160         int nseg;
 161
 162         if (esize > PAGE_SIZE) {
 163                 /* round up to PAGE_SIZE */
 164                 esize = ssize = roundup2(esize, PAGE_SIZE);
 165                 nseg = n;
 166         } else {
 167                 /* allocate PAGE_SIZE segment for small elements */
 168                 ssize = rounddown(PAGE_SIZE, esize);
 169                 nseg = howmany(n, ssize / esize);
 170         }
 171         am = (struct fwdma_alloc_multi *)kmalloc(sizeof(struct fwdma_alloc_multi)
 172                         + sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK);
 173         am->ssize = ssize;
 174         am->esize = esize;
 175         am->nseg = 0;
 176         if (bus_dma_tag_create(
 177                         /*parent*/ fc->dmat,
 178                         /*alignment*/ alignment,
 179                         /*boundary*/ 0,
 180                         /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
 181                         /*highaddr*/ BUS_SPACE_MAXADDR,
 182                         /*filter*/NULL, /*filterarg*/NULL,
 183                         /*maxsize*/ ssize,
 184                         /*nsegments*/ 1,
 185                         /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
 186                         /*flags*/ BUS_DMA_ALLOCNOW,
 187 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
 188                         /*lockfunc*/busdma_lock_mutex,
 189                         /*lockarg*/&Giant,
 190 #endif
 191                         &am->dma_tag)) {
 192                 kprintf("fwdma_malloc_multiseg: tag_create failed\n");
 193                 kfree(am, M_FW);
 194                 return(NULL);
 195         }
 196
 197 #if 0
 198 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 199         kprintf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg);
 200 #else
 201         kprintf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg);
 202 #endif
 203 #endif
 204         for (seg = &am->seg[0]; nseg --; seg ++) {
 205                 seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map,
 206                         ssize, &seg->bus_addr, flag);
 207                 if (seg->v_addr == NULL) {
 208                         kprintf("fwdma_malloc_multi: malloc_size failed %d\n",
 209                                 am->nseg);
 210                         fwdma_free_multiseg(am);
 211                         return(NULL);
 212                 }
 213                 am->nseg++;
 214         }
 215         return(am);
 216 }
 217
 218 void
 219 fwdma_free_multiseg(struct fwdma_alloc_multi *am)
 220 {
 221         struct fwdma_seg *seg;
 222
 223         for (seg = &am->seg[0]; am->nseg --; seg ++) {
 224                 fwdma_free_size(am->dma_tag, seg->dma_map,
 225                         seg->v_addr, am->ssize);
 226         }
 227         bus_dma_tag_destroy(am->dma_tag);
 228         kfree(am, M_FW);
 229 }