fwdma.c

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    1 /*      $NetBSD: fwdma.c,v 1.12 2008/01/04 21:17:59 ad 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 1.12 2008/01/04 21:17:59 ad 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 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/ieee1394/fwdma.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ieee1394/fwdma.c