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hpcdma.h revision 1.7 
      1 /*	$NetBSD: hpcdma.h,v 1.7 2008/04/28 20:23:34 martin Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001 Wayne Knowles
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Wayne Knowles
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SGIMIPS_HPC_DMA_H
     33 #define _SGIMIPS_HPC_DMA_H
     34 
     35 #include <machine/bus.h>
     36 
     37 struct hpc_dma_softc {
     38 	bus_space_tag_t		sc_bst;
     39 	bus_space_handle_t	sc_bsh;
     40 	bus_dma_tag_t		sc_dmat;
     41 
     42 	u_int32_t		sc_flags;
     43 #define	HPCDMA_READ	0x20		/* direction of transfer */
     44 #define	HPCDMA_LOADED	0x40		/* bus_dmamap loaded */
     45 #define	HPCDMA_ACTIVE	0x80		/* DMA engine is busy */
     46 	u_int32_t		sc_dmacmd;
     47 	int			sc_ndesc;
     48 	bus_dmamap_t		sc_dmamap;
     49 	struct hpc_dma_desc    *sc_desc_kva;	/* Virtual address */
     50 	struct hpc_dma_desc    *sc_desc_pa;	/* Physical address */
     51 	ssize_t			sc_dlen;	/* number of bytes transfered */
     52 	struct hpc_values       *hpc;		/* constants for HPC1/3 */
     53 };
     54 
     55 
     56 void hpcdma_init(struct hpc_attach_args *, struct hpc_dma_softc *, int);
     57 void hpcdma_sglist_create(struct hpc_dma_softc *, bus_dmamap_t);
     58 void hpcdma_cntl(struct hpc_dma_softc *, u_int32_t);
     59 void hpcdma_reset(struct hpc_dma_softc *);
     60 void hpcdma_flush(struct hpc_dma_softc *);
     61 
     62 #endif /* _SGIMIPS_HPC_DMA_H */
     63