sys/arch/sun3/dev/sivar.h

   1 /*      $NetBSD: sivar.h,v 1.10 2007/02/04 01:38:34 tsutsui Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Adam Glass, David Jones, and Gordon W. Ross.
   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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * This file defines the interface between si.c and
  34  * the bus-specific files: si_obio.c, si_vme.c
  35  */
  36
  37 /*
  38  * Transfers smaller than this are done using PIO
  39  * (on assumption they're not worth DMA overhead)
  40  */
  41 #define MIN_DMA_LEN 128
  42
  43 /*
  44  * Transfers lager than 65535 bytes need to be split-up.
  45  * (Some of the FIFO logic has only 16 bits counters.)
  46  * Make the size an integer multiple of the page size
  47  * to avoid buf/cluster remap problems.  (paranoid?)
  48  */
  49 #define MAX_DMA_LEN 0xE000
  50
  51 /*
  52  * This structure is used to keep track of mapped DMA requests.
  53  */
  54 struct si_dma_handle {
  55         int             dh_flags;
  56 #define SIDH_BUSY       1               /* This DH is in use */
  57 #define SIDH_OUT        2               /* DMA does data out (write) */
  58         vaddr_t         dh_dmaaddr;     /* VA of buffer in DVMA space */
  59         vsize_t         dh_dmalen;      /* Length of KVA mapping. */
  60 };
  61
  62 /*
  63  * The first structure member has to be the ncr5380_softc
  64  * so we can just cast to go back and fourth between them.
  65  */
  66 struct si_softc {
  67         struct ncr5380_softc    ncr_sc;
  68         bus_space_tag_t         sc_bst;
  69         bus_space_handle_t      sc_bsh;
  70         volatile struct si_regs *sc_regs;
  71         bus_dma_tag_t           sc_dmat;
  72         bus_dmamap_t            sc_dmap;
  73         int             sc_adapter_type;
  74         int             sc_adapter_iv_am;       /* int. vec + address modifier */
  75         int     sc_options;                     /* options for this instance */
  76         int     sc_reqlen;              /* requested transfer length */
  77         struct si_dma_handle *sc_dma;
  78         /* DMA command block for the OBIO controller. */
  79         void *sc_dmacmd;
  80 };
  81
  82 /* Options for disconnect/reselect, DMA, and interrupts. */
  83 #define SI_NO_DISCONNECT    0xff
  84 #define SI_NO_PARITY_CHK  0xff00
  85 #define SI_FORCE_POLLING 0x10000
  86 #define SI_DISABLE_DMA   0x20000
  87 /* The options are taken from the config file (PR#1929) */
  88
  89 extern int si_debug;
  90
  91 void si_attach(struct si_softc *);
  92 int  si_intr(void *);
  93
  94 void si_dma_alloc(struct ncr5380_softc *);
  95 void si_dma_free(struct ncr5380_softc *);
  96 void si_dma_poll(struct ncr5380_softc *);