sys/dev/ieee1394/fwdma.c

   1 /*      $NetBSD: fwdma.c,v 1.11 2007/12/11 11:34:08 lukem Exp $ */
   2 /*-
   3  * Copyright (c) 2003
   4  *      Hidetoshi Shimokawa. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *
  17  *      This product includes software developed by Hidetoshi Shimokawa.
  18  *
  19  * 4. Neither the name of the author nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: fwdma.c,v 1.11 2007/12/11 11:34:08 lukem Exp $");
  39 #if defined(__FreeBSD__)
  40 __FBSDID("$FreeBSD: src/sys/dev/firewire/fwdma.c,v 1.9 2007/06/06 14:31:36 simokawa Exp $");
  41 #endif
  42
  43 #if defined(__FreeBSD__)
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/types.h>
  47 #include <sys/kernel.h>
  48 #include <sys/conf.h>
  49 #include <sys/malloc.h>
  50 #if defined(__FreeBSD__) && __FreeBSD_version >= 501102
  51 #include <sys/mutex.h>
  52 #endif
  53
  54 #include <sys/bus.h>
  55 #include <sys/bus.h>
  56
  57 #ifdef __DragonFly__
  58 #include <bus/firewire/fw_port.h>
  59 #include <bus/firewire/firewire.h>
  60 #include <bus/firewire/firewirereg.h>
  61 #include <bus/firewire/fwdma.h>
  62 #else
  63 #include <dev/firewire/fw_port.h>
  64 #include <dev/firewire/firewire.h>
  65 #include <dev/firewire/firewirereg.h>
  66 #include <dev/firewire/fwdma.h>
  67 #endif
  68 #elif defined(__NetBSD__)
  69 #include <sys/param.h>
  70 #include <sys/device.h>
  71 #include <sys/systm.h>
  72 #include <sys/types.h>
  73 #include <sys/kernel.h>
  74 #include <sys/malloc.h>
  75
  76 #include <sys/bus.h>
  77
  78 #include <dev/ieee1394/fw_port.h>
  79 #include <dev/ieee1394/firewire.h>
  80 #include <dev/ieee1394/firewirereg.h>
  81 #include <dev/ieee1394/fwdma.h>
  82 #endif
  83
  84 static void
  85 fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
  86 {
  87         bus_addr_t *baddr;
  88
  89         if (error)
  90                 printf("fwdma_map_cb: error=%d\n", error);
  91         baddr = (bus_addr_t *)arg;
  92         *baddr = segs->ds_addr;
  93 }
  94
  95 void *
  96 fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
  97         struct fwdma_alloc *dma, int flag)
  98 {
  99         int err;
 100
 101         dma->v_addr = NULL;
 102         err = fw_bus_dma_tag_create(
 103                 /*parent*/ fc->dmat,
 104                 /*alignment*/ alignment,
 105                 /*boundary*/ 0,
 106                 /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
 107                 /*highaddr*/ BUS_SPACE_MAXADDR,
 108                 /*filter*/NULL, /*filterarg*/NULL,
 109                 /*maxsize*/ size,
 110                 /*nsegments*/ 1,
 111                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
 112                 /*flags*/ BUS_DMA_ALLOCNOW,
 113                 /*lockfunc*/busdma_lock_mutex,
 114                 /*lockarg*/FW_GMTX(fc),
 115                 &dma->fw_dma_tag);
 116         if (err) {
 117                 printf("fwdma_malloc: failed(1)\n");
 118                 return(NULL);
 119         }
 120
 121         err = fw_bus_dmamem_alloc(dma->fw_dma_tag, &dma->v_addr,
 122                 flag, &dma->dma_map);
 123         if (err) {
 124                 printf("fwdma_malloc: failed(2)\n");
 125                 fw_bus_dma_tag_destroy(dma->fw_dma_tag);
 126                 return(NULL);
 127         }
 128
 129         err = fw_bus_dmamap_load(dma->fw_dma_tag, dma->dma_map, dma->v_addr,
 130                 size, fwdma_map_cb, &dma->bus_addr, flag);
 131         if (err != 0) {
 132                 printf("fwdma_malloc: failed(3)\n");
 133                 fw_bus_dmamem_free(dma->fw_dma_tag, dma->v_addr, dma->dma_map);
 134                 fw_bus_dma_tag_destroy(dma->fw_dma_tag);
 135                 return(NULL);
 136         }
 137
 138         return(dma->v_addr);
 139 }
 140
 141 void
 142 fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
 143 {
 144         fw_bus_dmamap_unload(dma->fw_dma_tag, dma->dma_map);
 145         fw_bus_dmamem_free(dma->fw_dma_tag, dma->v_addr, dma->dma_map);
 146         fw_bus_dma_tag_destroy(dma->fw_dma_tag);
 147 }
 148
 149
 150 void *
 151 fwdma_malloc_size(fw_bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
 152         bus_size_t size, bus_addr_t *bus_addr, int flag)
 153 {
 154         void *v_addr;
 155
 156         if (fw_bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
 157                 printf("fwdma_malloc_size: failed(1)\n");
 158                 return(NULL);
 159         }
 160         if (fw_bus_dmamap_load(dmat, *dmamap, v_addr, size,
 161                         fwdma_map_cb, bus_addr, flag)) {
 162                 printf("fwdma_malloc_size: failed(2)\n");
 163                 fw_bus_dmamem_free(dmat, v_addr, *dmamap);
 164                 return(NULL);
 165         }
 166         return(v_addr);
 167 }
 168
 169 void
 170 fwdma_free_size(fw_bus_dma_tag_t dmat, bus_dmamap_t dmamap, void *vaddr,
 171     bus_size_t size)
 172 {
 173         fw_bus_dmamap_unload(dmat, dmamap);
 174         fw_bus_dmamem_free(dmat, vaddr, dmamap);
 175 }
 176
 177 /*
 178  * Allocate multisegment dma buffers
 179  * each segment size is eqaul to ssize except last segment.
 180  */
 181 struct fwdma_alloc_multi *
 182 fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
 183                 int esize, int n, int flag)
 184 {
 185         struct fwdma_alloc_multi *am;
 186         struct fwdma_seg *seg;
 187         bus_size_t ssize;
 188         int nseg, size;
 189
 190         if (esize > PAGE_SIZE) {
 191                 /* round up to PAGE_SIZE */
 192                 esize = ssize = roundup2(esize, PAGE_SIZE);
 193                 nseg = n;
 194         } else {
 195                 /* allocate PAGE_SIZE segment for small elements */
 196                 ssize = rounddown(PAGE_SIZE, esize);
 197                 nseg = howmany(n, ssize / esize);
 198         }
 199         size = sizeof (struct fwdma_alloc_multi) +
 200             sizeof (struct fwdma_seg) * nseg;
 201         am = (struct fwdma_alloc_multi *)malloc(size, M_FW, M_WAITOK);
 202         if (am == NULL) {
 203                 printf("fwdma_malloc_multiseg: malloc failed\n");
 204                 return(NULL);
 205         }
 206         memset(am, 0, size);
 207         am->ssize = ssize;
 208         am->esize = esize;
 209         am->nseg = 0;
 210         if (fw_bus_dma_tag_create(
 211                         /*parent*/ fc->dmat,
 212                         /*alignment*/ alignment,
 213                         /*boundary*/ 0,
 214                         /*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
 215                         /*highaddr*/ BUS_SPACE_MAXADDR,
 216                         /*filter*/NULL, /*filterarg*/NULL,
 217                         /*maxsize*/ ssize,
 218                         /*nsegments*/ 1,
 219                         /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
 220                         /*flags*/ BUS_DMA_ALLOCNOW,
 221                         /*lockfunc*/busdma_lock_mutex,
 222                         /*lockarg*/FW_GMTX(fc),
 223                         &am->fw_dma_tag)) {
 224                 printf("fwdma_malloc_multiseg: tag_create failed\n");
 225                 free(am, M_FW);
 226                 return(NULL);
 227         }
 228
 229 #if 0
 230 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 231         printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg);
 232 #else
 233         printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg);
 234 #endif
 235 #endif
 236         for (seg = &am->seg[0]; nseg --; seg ++) {
 237                 seg->v_addr = fwdma_malloc_size(am->fw_dma_tag, &seg->dma_map,
 238                         ssize, &seg->bus_addr, flag);
 239                 if (seg->v_addr == NULL) {
 240                         printf("fwdma_malloc_multi: malloc_size failed %d\n",
 241                                 am->nseg);
 242                         fwdma_free_multiseg(am);
 243                         return(NULL);
 244                 }
 245                 am->nseg++;
 246         }
 247         return(am);
 248 }
 249
 250 void
 251 fwdma_free_multiseg(struct fwdma_alloc_multi *am)
 252 {
 253         struct fwdma_seg *seg;
 254
 255         for (seg = &am->seg[0]; am->nseg --; seg ++) {
 256                 fwdma_free_size(am->fw_dma_tag, seg->dma_map,
 257                         seg->v_addr, am->ssize);
 258         }
 259         fw_bus_dma_tag_destroy(am->fw_dma_tag);
 260         free(am, M_FW);
 261 }