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tc_dma.c revision 1.2 
      1 /* $NetBSD: tc_dma.c,v 1.2 1997/06/07 00:02:15 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the NetBSD
     22  *	Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 #include <machine/options.h>		/* Config options headers */
     41 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     42 
     43 __KERNEL_RCSID(0, "$NetBSD: tc_dma.c,v 1.2 1997/06/07 00:02:15 thorpej Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/device.h>
     47 
     48 #define _ALPHA_BUS_DMA_PRIVATE
     49 #include <machine/bus.h>
     50 
     51 #include <dev/tc/tcvar.h>
     52 
     53 bus_dma_tag_t (*tc_dma_get_tag_func) __P((int));
     54 
     55 int	tc_bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t, void *,
     56 	    bus_size_t, struct proc *, int));
     57 int	tc_bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t, bus_dmamap_t,
     58 	    struct mbuf *, int));
     59 int	tc_bus_dmamap_load_uio_direct __P((bus_dma_tag_t, bus_dmamap_t,
     60 	    struct uio *, int));
     61 int	tc_bus_dmamap_load_raw_direct __P((bus_dma_tag_t, bus_dmamap_t,
     62 	    bus_dma_segment_t *, int, bus_size_t, int));
     63 
     64 
     65 struct alpha_bus_dma_tag tc_dmat_direct = {
     66 	NULL,				/* _cookie */
     67 	NULL,				/* _get_tag */
     68 	_bus_dmamap_create,
     69 	_bus_dmamap_destroy,
     70 	tc_bus_dmamap_load_direct,
     71 	tc_bus_dmamap_load_mbuf_direct,
     72 	tc_bus_dmamap_load_uio_direct,
     73 	tc_bus_dmamap_load_raw_direct,
     74 	_bus_dmamap_unload,
     75 	NULL,				/* _dmamap_sync */
     76 	_bus_dmamem_alloc,
     77 	_bus_dmamem_free,
     78 	_bus_dmamem_map,
     79 	_bus_dmamem_unmap,
     80 	_bus_dmamem_mmap,
     81 };
     82 
     83 void
     84 tc_dma_init()
     85 {
     86 
     87 	/* XXX XXX BEGIN XXX XXX */
     88 	{							/* XXX */
     89 		extern vm_offset_t alpha_XXX_dmamap_or;		/* XXX */
     90 		alpha_XXX_dmamap_or = 0;			/* XXX */
     91 	}							/* XXX */
     92 	/* XXX XXX END XXX XXX */
     93 }
     94 
     95 /*
     96  * Load a TurboChannel direct-mapped DMA map with a linear buffer.
     97  */
     98 int
     99 tc_bus_dmamap_load_direct(t, map, buf, buflen, p, flags)
    100 	bus_dma_tag_t t;
    101 	bus_dmamap_t map;
    102 	void *buf;
    103 	bus_size_t buflen;
    104 	struct proc *p;
    105 	int flags;
    106 {
    107 
    108 	return (_bus_dmamap_load_direct_common(t, map, buf, buflen, p,
    109 	    flags, 0));
    110 }
    111 
    112 /*
    113  * Load a TurboChannel direct-mapped DMA map with an mbuf chain.
    114  */
    115 int
    116 tc_bus_dmamap_load_mbuf_direct(t, map, m, flags)
    117 	bus_dma_tag_t t;
    118 	bus_dmamap_t map;
    119 	struct mbuf *m;
    120 	int flags;
    121 {
    122 
    123 	return (_bus_dmamap_load_mbuf_direct_common(t, map, m,
    124 	    flags, 0));
    125 }
    126 
    127 /*
    128  * Load a TurboChannel direct-mapped DMA map with a uio.
    129  */
    130 int
    131 tc_bus_dmamap_load_uio_direct(t, map, uio, flags)
    132 	bus_dma_tag_t t;
    133 	bus_dmamap_t map;
    134 	struct uio *uio;
    135 	int flags;
    136 {
    137 
    138 	return (_bus_dmamap_load_uio_direct_common(t, map, uio,
    139 	    flags, 0));
    140 }
    141 
    142 /*
    143  * Load a TurboChannel direct-mapped DMA map with raw memory.
    144  */
    145 int
    146 tc_bus_dmamap_load_raw_direct(t, map, segs, nsegs, size, flags)
    147 	bus_dma_tag_t t;
    148 	bus_dmamap_t map;
    149 	bus_dma_segment_t *segs;
    150 	int nsegs;
    151 	bus_size_t size;
    152 	int flags;
    153 {
    154 
    155 	return (_bus_dmamap_load_raw_direct_common(t, map, segs, nsegs,
    156 	    size, flags, 0));
    157 }
    158