sys/arch/alpha/pci/a12c_dma.c

   1 /* $NetBSD: a12c_dma.c,v 1.5 2009/03/14 14:45:53 dsl 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  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Stub version -- drivers used on the A12 (primarily ade) were adapted
  35  *                 for NetBSD prior to the availability of bus_dma.
  36  *                 They employ ad-hoc support for the required sram
  37  *                 bounce buffers and are not in the NetBSD source
  38  *                 tree.  When a bus_dma if_de is available, this
  39  *                 module will need to be completed!  I certainly
  40  *                 would not mind committing if_ade, but it doesn't
  41  *                 have any lasting value.
  42  */
  43
  44 #include "opt_avalon_a12.h"             /* Config options headers */
  45 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  46
  47 __KERNEL_RCSID(0, "$NetBSD: a12c_dma.c,v 1.5 2009/03/14 14:45:53 dsl Exp $");
  48
  49 #include <sys/param.h>
  50 #include <sys/systm.h>
  51 #include <sys/kernel.h>
  52 #include <sys/device.h>
  53 #include <sys/malloc.h>
  54
  55 #include <uvm/uvm_extern.h>
  56
  57 #define _ALPHA_BUS_DMA_PRIVATE
  58 #include <machine/bus.h>
  59
  60 #include <dev/pci/pcireg.h>
  61 #include <dev/pci/pcivar.h>
  62 #include <alpha/pci/a12creg.h>
  63 #include <alpha/pci/a12cvar.h>
  64
  65 #define A12C_DMA()      /* Generate ctags(1) key */
  66
  67 bus_dma_tag_t a12c_dma_get_tag(bus_dma_tag_t, alpha_bus_t);
  68
  69
  70 int     a12c_bus_dmamap_load_direct(bus_dma_tag_t, bus_dmamap_t, void *,
  71             bus_size_t, struct proc *, int);
  72
  73 int     a12c_bus_dmamap_load_mbuf_direct(bus_dma_tag_t, bus_dmamap_t,
  74             struct mbuf *, int);
  75
  76 int     a12c_bus_dmamap_load_uio_direct(bus_dma_tag_t, bus_dmamap_t,
  77             struct uio *, int);
  78
  79 int     a12c_bus_dmamap_load_raw_direct(bus_dma_tag_t, bus_dmamap_t,
  80             bus_dma_segment_t *, int, bus_size_t, int);
  81
  82 void
  83 a12c_dma_init(struct a12c_config *ccp)
  84 {
  85 }
  86
  87 /*
  88  * Return the bus dma tag to be used for the specified bus type.
  89  * INTERNAL USE ONLY!
  90  */
  91 bus_dma_tag_t
  92 a12c_dma_get_tag(bus_dma_tag_t t, alpha_bus_t bustype)
  93 {
  94         DIE();
  95 }
  96 /*
  97  * Load a A12C direct-mapped DMA map with a linear buffer.
  98  */
  99 int
 100 a12c_bus_dmamap_load_direct(bus_dma_tag_t t, bus_dmamap_t map, void *buf, bus_size_t buflen, struct proc *p, int flags)
 101 {
 102         DIE();
 103 #if 0
 104
 105         return (_bus_dmamap_load_direct_common(t, map, buf, buflen, p,
 106             flags, A12C_DIRECT_MAPPED_BASE));
 107 #endif
 108 }
 109 /*
 110  * Load a A12C direct-mapped DMA map with an mbuf chain.
 111  */
 112 int
 113 a12c_bus_dmamap_load_mbuf_direct(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m, int flags)
 114 {
 115         DIE();
 116 #if 0
 117
 118         return (_bus_dmamap_load_mbuf_direct_common(t, map, m,
 119             flags, A12C_DIRECT_MAPPED_BASE));
 120 #endif
 121 }
 122 /*
 123  * Load a A12C direct-mapped DMA map with a uio.
 124  */
 125 int
 126 a12c_bus_dmamap_load_uio_direct(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, int flags)
 127 {
 128         DIE();
 129 #if 0
 130
 131         return (_bus_dmamap_load_uio_direct_common(t, map, uio,
 132             flags, A12C_DIRECT_MAPPED_BASE));
 133 #endif
 134 }
 135 /*
 136  * Load a A12C direct-mapped DMA map with raw memory.
 137  */
 138 int
 139 a12c_bus_dmamap_load_raw_direct(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags)
 140 {
 141         DIE();
 142 #if 0
 143
 144         return (_bus_dmamap_load_raw_direct_common(t, map, segs, nsegs,
 145             size, flags, A12C_DIRECT_MAPPED_BASE));
 146 #endif
 147 }