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nextdmavar.h revision 1.1 
      1 /*	$NetBSD: nextdmavar.h,v 1.1 1998/06/09 07:53:05 dbj Exp $	*/
      2 /*
      3  * Copyright (c) 1998 Darrin B. Jewell
      4  * 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  *      This product includes software developed by Darrin B. Jewell
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 
     33 struct nextdma_config {
     34 	bus_space_tag_t nd_bst;				/* bus space tag */
     35 	bus_space_tag_t nd_bsh;				/* bus space handle for device */
     36 
     37   u_long nd_intr;               /* NEXT_I_ values from cpu.h */
     38 
     39 	bus_dma_tag_t nd_dmat;
     40 
     41 	/* This is called to get another map to dma */
     42 	bus_dmamap_t (*nd_continue_cb) __P((void *));
     43 	/* This is called when a map has completed dma */
     44 	void (*nd_completed_cb) __P((bus_dmamap_t, void *));
     45 	/* This is called when dma shuts down */
     46 	void (*nd_shutdown_cb)  __P((void *));
     47 
     48 	int nd_chaining_flag;					/* true if this interface chains */
     49 
     50 	void *nd_cb_arg;							/* callback argument */
     51 
     52 	struct generic_bus_dma_tag _nd_dmat; /* should probably be elsewhere */
     53 	bus_dmamap_t _nd_map;					/* map currently in dd_next */
     54 	int          _nd_idx;					/* idx of segment currently in dd_next */
     55 	bus_dmamap_t _nd_map_cont;    /* map needed to continue DMA */
     56 	int          _nd_idx_cont;		/* segment index to continue DMA */
     57 };
     58 
     59 
     60 /* Configure the interface & initialize private structure vars */
     61 void nextdma_config __P((struct nextdma_config *));
     62 void nextdma_init __P((struct nextdma_config *));
     63 void nextdma_start __P((struct nextdma_config *, u_long));
     64 
     65 /* query to see if nextdma is finished */
     66 int nextdma_finished __P((	struct nextdma_config *));
     67 void nextdma_reset __P((struct nextdma_config *));
     68