131 lines
4.2 KiB
C
131 lines
4.2 KiB
C
/*-
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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: 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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#ifndef howmany
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#define howmany(x, y) (((x)+((y)-1))/(y)) // x/y的上界
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#endif
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#define rounddown(x, y) (((x)/(y))*(y)) // 比x小，y的最大的倍数
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#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */ // 比x大，y的最小倍数
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#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
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#define powerof2(x) ((((x)-1)&(x))==0) // 是否是2的次方
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typedef uint32_t bus_addr_t;
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typedef uint32_t bus_size_t;
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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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area_id BufArea;
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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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area_id BufArea;
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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 ((caddr_t)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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#ifndef __HAIKU__
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static __inline void
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fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op)
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{
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bus_dmamap_sync(dma->dma_tag, dma->dma_map, op);
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}
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static __inline void
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fwdma_sync_multiseg(struct fwdma_alloc_multi *am,
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int start, int end, bus_dmasync_op_t op)
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{
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struct fwdma_seg *seg, *eseg;
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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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for (; seg <= eseg; seg ++)
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bus_dmamap_sync(am->dma_tag, seg->dma_map, 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, bus_dmasync_op_t 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[0];
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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, op);
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}
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void *fwdma_malloc(int, bus_size_t, struct fwdma_alloc *, int);
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void fwdma_free(struct fwdma_alloc *);
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void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int);
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void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t);
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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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#endif /*__HAIKU__*/
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#endif /* _FWDMA_H*/
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