130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/* $NetBSD: fwdma.h,v 1.6 2010/03/29 03:05:27 kiyohara Exp $ */
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/*-
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* Copyright (C) 2003
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* Hidetoshi Shimokawa. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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*
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* This product includes software developed by Hidetoshi Shimokawa.
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*
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* 4. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: /repoman/r/ncvs/src/sys/dev/firewire/fwdma.h,v 1.3 2005/01/06 01:42:41 imp Exp $
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*/
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#ifndef _FWDMA_H_
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#define _FWDMA_H_
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struct fwdma_alloc {
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bus_dma_tag_t dma_tag;
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bus_dmamap_t dma_map;
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void * v_addr;
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bus_addr_t bus_addr;
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};
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struct fwdma_seg {
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bus_dmamap_t dma_map;
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void * v_addr;
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bus_addr_t bus_addr;
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};
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struct fwdma_alloc_multi {
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bus_size_t ssize;
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bus_size_t esize;
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int nseg;
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bus_dma_tag_t dma_tag;
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struct fwdma_seg seg[0];
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};
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static __inline void *
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fwdma_v_addr(struct fwdma_alloc_multi *am, int index)
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{
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bus_size_t ssize = am->ssize;
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int offset = am->esize * index;
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return (char *)am->seg[offset / ssize].v_addr + (offset % ssize);
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}
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static __inline bus_addr_t
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fwdma_bus_addr(struct fwdma_alloc_multi *am, int index)
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{
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bus_size_t ssize = am->ssize;
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int offset = am->esize * index;
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return am->seg[offset / ssize].bus_addr + (offset % ssize);
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}
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static __inline void
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fwdma_sync_multiseg(struct fwdma_alloc_multi *am, int start, int end, int op)
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{
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struct fwdma_seg *seg, *eseg;
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bus_addr_t off, eoff;
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off = (am->esize * start) % am->ssize;
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eoff = (am->esize * end) % am->ssize;
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seg = &am->seg[am->esize * start / am->ssize];
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eseg = &am->seg[am->esize * end / am->ssize];
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if (start > end) {
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for (; seg < &am->seg[am->nseg]; seg++) {
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bus_dmamap_sync(am->dma_tag, seg->dma_map,
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off, seg->dma_map->dm_mapsize - off, op);
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off = 0;
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}
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seg = am->seg;
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}
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for (; seg < eseg; seg++) {
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bus_dmamap_sync(am->dma_tag, seg->dma_map,
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off, seg->dma_map->dm_mapsize - off, op);
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off = 0;
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}
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bus_dmamap_sync(am->dma_tag, seg->dma_map,
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off, eoff - off + am->esize, op);
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}
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static __inline void
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fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, int op)
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{
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struct fwdma_seg *seg;
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int i;
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seg = am->seg;
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for (i = 0; i < am->nseg; i++, seg++)
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bus_dmamap_sync(am->dma_tag, seg->dma_map,
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0, seg->dma_map->dm_mapsize, op);
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}
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void *fwdma_malloc(device_t, bus_dma_tag_t, bus_dmamap_t *, bus_size_t, int,
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int);
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void fwdma_free(bus_dma_tag_t, bus_dmamap_t, void *);
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void *fwdma_alloc_setup(device_t, bus_dma_tag_t, bus_size_t,
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struct fwdma_alloc *, int, int);
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struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *,
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int, int, int, int);
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void fwdma_free_multiseg(struct fwdma_alloc_multi *);
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#endif /* _FWDMA_H_ */
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