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      1 /*	$NetBSD: hpcdma.h,v 1.12 2019/12/27 09:41:49 msaitoh 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _SGIMIPS_HPC_DMA_H
     40 #define _SGIMIPS_HPC_DMA_H
     41 
     42 #include <sys/bus.h>
     43 
     44 struct hpc_dma_softc {
     45 	bus_space_tag_t		sc_bst;
     46 	bus_space_handle_t	sc_bsh;
     47 	bus_dma_tag_t		sc_dmat;
     48 
     49 	uint32_t		sc_flags;
     50 #define	HPCDMA_READ	0x20		/* direction of transfer */
     51 #define	HPCDMA_LOADED	0x40		/* bus_dmamap loaded */
     52 #define	HPCDMA_ACTIVE	0x80		/* DMA engine is busy */
     53 	uint32_t		sc_dmacmd;
     54 	int			sc_ndesc;
     55 	bus_dmamap_t		sc_dmamap;
     56 	struct hpc_dma_desc    *sc_desc_kva;	/* Virtual address */
     57 	bus_addr_t		sc_desc_pa;	/* DMA address */
     58 	ssize_t			sc_dlen;	/* # of bytes transferred */
     59 	struct hpc_values       *hpc;		/* constants for HPC1/3 */
     60 };
     61 
     62 
     63 void hpcdma_init(struct hpc_attach_args *, struct hpc_dma_softc *, int);
     64 void hpcdma_sglist_create(struct hpc_dma_softc *, bus_dmamap_t);
     65 void hpcdma_cntl(struct hpc_dma_softc *, uint32_t);
     66 void hpcdma_reset(struct hpc_dma_softc *);
     67 void hpcdma_flush(struct hpc_dma_softc *);
     68 
     69 #endif /* _SGIMIPS_HPC_DMA_H */
     70