101 lines
3.8 KiB
C
101 lines
3.8 KiB
C
/* $NetBSD: sivar.h,v 1.6 1997/10/17 03:33:47 gwr Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Adam Glass, David Jones, and Gordon W. Ross.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This file defines the interface between si.c and
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* the bus-specific files: si_obio.c, si_vme.c
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*/
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/*
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* Transfers smaller than this are done using PIO
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* (on assumption they're not worth DMA overhead)
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*/
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#define MIN_DMA_LEN 128
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/*
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* Transfers lager than 65535 bytes need to be split-up.
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* (Some of the FIFO logic has only 16 bits counters.)
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* Make the size an integer multiple of the page size
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* to avoid buf/cluster remap problems. (paranoid?)
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*/
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#define MAX_DMA_LEN 0xE000
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/*
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* This structure is used to keep track of mapped DMA requests.
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*/
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struct si_dma_handle {
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int dh_flags;
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#define SIDH_BUSY 1 /* This DH is in use */
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#define SIDH_OUT 2 /* DMA does data out (write) */
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u_char * dh_addr; /* KVA of start of buffer */
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int dh_maplen; /* Length of KVA mapping. */
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void * dh_dvma; /* VA of buffer in DVMA space */
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};
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/*
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* The first structure member has to be the ncr5380_softc
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* so we can just cast to go back and fourth between them.
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*/
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struct si_softc {
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struct ncr5380_softc ncr_sc;
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volatile struct si_regs *sc_regs;
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int sc_adapter_type;
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int sc_adapter_iv_am; /* int. vec + address modifier */
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int sc_options; /* options for this instance */
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int sc_reqlen; /* requested transfer length */
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struct si_dma_handle *sc_dma;
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/* DMA command block for the OBIO controller. */
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void *sc_dmacmd;
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};
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/* Options for disconnect/reselect, DMA, and interrupts. */
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#define SI_NO_DISCONNECT 0xff
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#define SI_NO_PARITY_CHK 0xff00
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#define SI_FORCE_POLLING 0x10000
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#define SI_DISABLE_DMA 0x20000
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/* The options are taken from the config file (PR#1929) */
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extern int si_debug;
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void si_attach __P((struct si_softc *));
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int si_intr __P((void *));
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void si_dma_alloc __P((struct ncr5380_softc *));
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void si_dma_free __P((struct ncr5380_softc *));
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void si_dma_poll __P((struct ncr5380_softc *));
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