sys/dev/ieee1394/fwdma.h

   1 /*      $NetBSD: fwdma.h,v 1.4 2006/02/16 20:17:19 perry 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  * $FreeBSD: /repoman/r/ncvs/src/sys/dev/firewire/fwdma.h,v 1.3 2005/01/06 01:42:41 imp Exp $
  36  */
  37
  38 struct fwdma_alloc {
  39         fw_bus_dma_tag_t        fw_dma_tag;
  40         bus_dmamap_t    dma_map;
  41         void *          v_addr;
  42         bus_addr_t      bus_addr;
  43 };
  44
  45 struct fwdma_seg {
  46         bus_dmamap_t    dma_map;
  47         void *          v_addr;
  48         bus_addr_t      bus_addr;
  49 };
  50
  51 struct fwdma_alloc_multi {
  52         bus_size_t      ssize;
  53         bus_size_t      esize;
  54         int             nseg;
  55         fw_bus_dma_tag_t        fw_dma_tag;
  56         struct fwdma_seg seg[0];
  57 };
  58
  59 static __inline void *
  60 fwdma_v_addr(struct fwdma_alloc_multi *am, int index)
  61 {
  62         bus_size_t ssize = am->ssize;
  63         int offset = am->esize * index;
  64
  65         return ((char *)am->seg[offset / ssize].v_addr + (offset % ssize));
  66 }
  67
  68 static __inline bus_addr_t
  69 fwdma_bus_addr(struct fwdma_alloc_multi *am, int index)
  70 {
  71         bus_size_t ssize = am->ssize;
  72         int offset = am->esize * index;
  73
  74         return (am->seg[offset / ssize].bus_addr + (offset % ssize));
  75 }
  76
  77 static __inline void
  78 fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op)
  79 {
  80         fw_bus_dmamap_sync(dma->fw_dma_tag, dma->dma_map, op);
  81 }
  82
  83 static __inline void
  84 fwdma_sync_multiseg(struct fwdma_alloc_multi *am,
  85                         int start, int end, bus_dmasync_op_t op)
  86 {
  87         struct fwdma_seg *seg, *eseg;
  88
  89         seg = &am->seg[am->esize * start / am->ssize];
  90         eseg = &am->seg[am->esize * end / am->ssize];
  91         for (; seg <= eseg; seg ++)
  92                 fw_bus_dmamap_sync(am->fw_dma_tag, seg->dma_map, op);
  93 }
  94
  95 static __inline void
  96 fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op)
  97 {
  98         struct fwdma_seg *seg;
  99         int i;
 100
 101         seg = &am->seg[0];
 102         for (i = 0; i < am->nseg; i++, seg++)
 103                 fw_bus_dmamap_sync(am->fw_dma_tag, seg->dma_map, op);
 104 }
 105
 106 void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int);
 107 void fwdma_free(struct firewire_comm *, struct fwdma_alloc *);
 108 void *fwdma_malloc_size(
 109         fw_bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int);
 110 void fwdma_free_size(fw_bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t);
 111 struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *,
 112         int, int, int, int);
 113 void fwdma_free_multiseg(struct fwdma_alloc_multi *);
 114