NetBSD/sys/arch/next68k/dev/nextdmavar.h

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/* $NetBSD: nextdmavar.h,v 1.2 1998/07/05 07:53:45 dbj Exp $ */
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/*
* Copyright (c) 1998 Darrin B. Jewell
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Darrin B. Jewell
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
struct nextdma_config {
bus_space_tag_t nd_bst; /* bus space tag */
bus_space_handle_t nd_bsh; /* bus space handle for device */
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u_long nd_intr; /* NEXT_I_ values from cpu.h */
bus_dma_tag_t nd_dmat;
/* This is called to get another map to dma */
bus_dmamap_t (*nd_continue_cb) __P((void *));
/* This is called when a map has completed dma */
void (*nd_completed_cb) __P((bus_dmamap_t, void *));
/* This is called when dma shuts down */
void (*nd_shutdown_cb) __P((void *));
int nd_chaining_flag; /* true if this interface chains */
void *nd_cb_arg; /* callback argument */
struct generic_bus_dma_tag _nd_dmat; /* should probably be elsewhere */
bus_dmamap_t _nd_map; /* map currently in dd_next */
int _nd_idx; /* idx of segment currently in dd_next */
bus_dmamap_t _nd_map_cont; /* map needed to continue DMA */
int _nd_idx_cont; /* segment index to continue DMA */
};
/* Configure the interface & initialize private structure vars */
void nextdma_config __P((struct nextdma_config *));
void nextdma_init __P((struct nextdma_config *));
void nextdma_start __P((struct nextdma_config *, u_long));
/* query to see if nextdma is finished */
int nextdma_finished __P(( struct nextdma_config *));
void nextdma_reset __P((struct nextdma_config *));