Home | History | Annotate | Line # | Download | only in tc
tc_dma.c revision 1.4 
      1 /* $NetBSD: tc_dma.c,v 1.4 1998/01/19 02:53:03 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1997, 1998 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 1.4 1998/01/19 02:53:03 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 int	tc_bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t, void *,
     53 	    bus_size_t, struct proc *, int));
     54 int	tc_bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t, bus_dmamap_t,
     55 	    struct mbuf *, int));
     56 int	tc_bus_dmamap_load_uio_direct __P((bus_dma_tag_t, bus_dmamap_t,
     57 	    struct uio *, int));
     58 int	tc_bus_dmamap_load_raw_direct __P((bus_dma_tag_t, bus_dmamap_t,
     59 	    bus_dma_segment_t *, int, bus_size_t, int));
     60 
     61 
     62 struct alpha_bus_dma_tag tc_dmat_direct = {
     63 	NULL,				/* _cookie */
     64 	NULL,				/* _get_tag */
     65 	_bus_dmamap_create,
     66 	_bus_dmamap_destroy,
     67 	tc_bus_dmamap_load_direct,
     68 	tc_bus_dmamap_load_mbuf_direct,
     69 	tc_bus_dmamap_load_uio_direct,
     70 	tc_bus_dmamap_load_raw_direct,
     71 	_bus_dmamap_unload,
     72 	NULL,				/* _dmamap_sync */
     73 	_bus_dmamem_alloc,
     74 	_bus_dmamem_free,
     75 	_bus_dmamem_map,
     76 	_bus_dmamem_unmap,
     77 	_bus_dmamem_mmap,
     78 };
     79 
     80 void
     81 tc_dma_init()
     82 {
     83 
     84 	/* XXX XXX BEGIN XXX XXX */
     85 	{							/* XXX */
     86 		extern vm_offset_t alpha_XXX_dmamap_or;		/* XXX */
     87 		alpha_XXX_dmamap_or = 0;			/* XXX */
     88 	}							/* XXX */
     89 	/* XXX XXX END XXX XXX */
     90 }
     91 
     92 /*
     93  * Load a TurboChannel direct-mapped DMA map with a linear buffer.
     94  */
     95 int
     96 tc_bus_dmamap_load_direct(t, map, buf, buflen, p, flags)
     97 	bus_dma_tag_t t;
     98 	bus_dmamap_t map;
     99 	void *buf;
    100 	bus_size_t buflen;
    101 	struct proc *p;
    102 	int flags;
    103 {
    104 
    105 	return (_bus_dmamap_load_direct_common(t, map, buf, buflen, p,
    106 	    flags, 0));
    107 }
    108 
    109 /*
    110  * Load a TurboChannel direct-mapped DMA map with an mbuf chain.
    111  */
    112 int
    113 tc_bus_dmamap_load_mbuf_direct(t, map, m, flags)
    114 	bus_dma_tag_t t;
    115 	bus_dmamap_t map;
    116 	struct mbuf *m;
    117 	int flags;
    118 {
    119 
    120 	return (_bus_dmamap_load_mbuf_direct_common(t, map, m,
    121 	    flags, 0));
    122 }
    123 
    124 /*
    125  * Load a TurboChannel direct-mapped DMA map with a uio.
    126  */
    127 int
    128 tc_bus_dmamap_load_uio_direct(t, map, uio, flags)
    129 	bus_dma_tag_t t;
    130 	bus_dmamap_t map;
    131 	struct uio *uio;
    132 	int flags;
    133 {
    134 
    135 	return (_bus_dmamap_load_uio_direct_common(t, map, uio,
    136 	    flags, 0));
    137 }
    138 
    139 /*
    140  * Load a TurboChannel direct-mapped DMA map with raw memory.
    141  */
    142 int
    143 tc_bus_dmamap_load_raw_direct(t, map, segs, nsegs, size, flags)
    144 	bus_dma_tag_t t;
    145 	bus_dmamap_t map;
    146 	bus_dma_segment_t *segs;
    147 	int nsegs;
    148 	bus_size_t size;
    149 	int flags;
    150 {
    151 
    152 	return (_bus_dmamap_load_raw_direct_common(t, map, segs, nsegs,
    153 	    size, flags, 0));
    154 }
    155