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fwdma.h revision 1.1 
      1 /*	$NetBSD: fwdma.h,v 1.1 2005/07/11 15:29:05 kiyohara 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 ((caddr_t)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 
    115