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tc_dma.c revision 1.3 
      1 /* $NetBSD: tc_dma.c,v 1.3 1997/09/02 13:20:27 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 <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     41 
     42 __KERNEL_RCSID(0, "$NetBSD: tc_dma.c,v 1.3 1997/09/02 13:20:27 thorpej Exp $");
     43 
     44 #include <sys/param.h>
     45 #include <sys/device.h>
     46 
     47 #define _ALPHA_BUS_DMA_PRIVATE
     48 #include <machine/bus.h>
     49 
     50 #include <dev/tc/tcvar.h>
     51 
     52 bus_dma_tag_t (*tc_dma_get_tag_func) __P((int));
     53 
     54 int	tc_bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t, void *,
     55 	    bus_size_t, struct proc *, int));
     56 int	tc_bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t, bus_dmamap_t,
     57 	    struct mbuf *, int));
     58 int	tc_bus_dmamap_load_uio_direct __P((bus_dma_tag_t, bus_dmamap_t,
     59 	    struct uio *, int));
     60 int	tc_bus_dmamap_load_raw_direct __P((bus_dma_tag_t, bus_dmamap_t,
     61 	    bus_dma_segment_t *, int, bus_size_t, int));
     62 
     63 
     64 struct alpha_bus_dma_tag tc_dmat_direct = {
     65 	NULL,				/* _cookie */
     66 	NULL,				/* _get_tag */
     67 	_bus_dmamap_create,
     68 	_bus_dmamap_destroy,
     69 	tc_bus_dmamap_load_direct,
     70 	tc_bus_dmamap_load_mbuf_direct,
     71 	tc_bus_dmamap_load_uio_direct,
     72 	tc_bus_dmamap_load_raw_direct,
     73 	_bus_dmamap_unload,
     74 	NULL,				/* _dmamap_sync */
     75 	_bus_dmamem_alloc,
     76 	_bus_dmamem_free,
     77 	_bus_dmamem_map,
     78 	_bus_dmamem_unmap,
     79 	_bus_dmamem_mmap,
     80 };
     81 
     82 void
     83 tc_dma_init()
     84 {
     85 
     86 	/* XXX XXX BEGIN XXX XXX */
     87 	{							/* XXX */
     88 		extern vm_offset_t alpha_XXX_dmamap_or;		/* XXX */
     89 		alpha_XXX_dmamap_or = 0;			/* XXX */
     90 	}							/* XXX */
     91 	/* XXX XXX END XXX XXX */
     92 }
     93 
     94 /*
     95  * Load a TurboChannel direct-mapped DMA map with a linear buffer.
     96  */
     97 int
     98 tc_bus_dmamap_load_direct(t, map, buf, buflen, p, flags)
     99 	bus_dma_tag_t t;
    100 	bus_dmamap_t map;
    101 	void *buf;
    102 	bus_size_t buflen;
    103 	struct proc *p;
    104 	int flags;
    105 {
    106 
    107 	return (_bus_dmamap_load_direct_common(t, map, buf, buflen, p,
    108 	    flags, 0));
    109 }
    110 
    111 /*
    112  * Load a TurboChannel direct-mapped DMA map with an mbuf chain.
    113  */
    114 int
    115 tc_bus_dmamap_load_mbuf_direct(t, map, m, flags)
    116 	bus_dma_tag_t t;
    117 	bus_dmamap_t map;
    118 	struct mbuf *m;
    119 	int flags;
    120 {
    121 
    122 	return (_bus_dmamap_load_mbuf_direct_common(t, map, m,
    123 	    flags, 0));
    124 }
    125 
    126 /*
    127  * Load a TurboChannel direct-mapped DMA map with a uio.
    128  */
    129 int
    130 tc_bus_dmamap_load_uio_direct(t, map, uio, flags)
    131 	bus_dma_tag_t t;
    132 	bus_dmamap_t map;
    133 	struct uio *uio;
    134 	int flags;
    135 {
    136 
    137 	return (_bus_dmamap_load_uio_direct_common(t, map, uio,
    138 	    flags, 0));
    139 }
    140 
    141 /*
    142  * Load a TurboChannel direct-mapped DMA map with raw memory.
    143  */
    144 int
    145 tc_bus_dmamap_load_raw_direct(t, map, segs, nsegs, size, flags)
    146 	bus_dma_tag_t t;
    147 	bus_dmamap_t map;
    148 	bus_dma_segment_t *segs;
    149 	int nsegs;
    150 	bus_size_t size;
    151 	int flags;
    152 {
    153 
    154 	return (_bus_dmamap_load_raw_direct_common(t, map, segs, nsegs,
    155 	    size, flags, 0));
    156 }
    157