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/* $NetBSD: sivar.h,v 1.3 1996/11/20 18:57:01 gwr Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Adam Glass, David Jones, and Gordon W. Ross.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This file defines the interface between si.c and
* the bus-specific files: si_obio.c, si_vme.c
*/
/*
* Transfers smaller than this are done using PIO
* (on assumption they're not worth DMA overhead)
*/
#define MIN_DMA_LEN 128
/*
* Transfers lager than 65535 bytes need to be split-up.
* (Some of the FIFO logic has only 16 bits counters.)
* Make the size an integer multiple of the page size
* to avoid buf/cluster remap problems. (paranoid?)
*/
#define MAX_DMA_LEN 0xE000
/*
* This structure is used to keep track of mapped DMA requests.
*/
struct si_dma_handle {
int dh_flags;
#define SIDH_BUSY 1 /* This DH is in use */
#define SIDH_OUT 2 /* DMA does data out (write) */
u_char * dh_addr; /* KVA of start of buffer */
int dh_maplen; /* Length of KVA mapping. */
long dh_dvma; /* VA of buffer in DVMA space */
};
/*
* The first structure member has to be the ncr5380_softc
* so we can just cast to go back and fourth between them.
*/
struct si_softc {
struct ncr5380_softc ncr_sc;
volatile struct si_regs *sc_regs;
int sc_adapter_type;
int sc_adapter_iv_am; /* int. vec + address modifier */
int sc_options; /* options for this instance */
int sc_reqlen; /* requested transfer length */
struct si_dma_handle *sc_dma;
/* DMA command block for the OBIO controller. */
void *sc_dmacmd;
};
/* Options. Interesting values are: 1,3,7 */
#define SI_ENABLE_DMA 1 /* Use DMA (maybe polled) */
#define SI_DMA_INTR 2 /* DMA completion interrupts */
#define SI_DO_RESELECT 4 /* Allow disconnect/reselect */
/* The options are taken from the config file (PR#1929) */
extern int si_debug;
void si_attach __P((struct si_softc *));
int si_intr __P((void *));
void si_reset_adapter __P((struct ncr5380_softc *));
void si_dma_alloc __P((struct ncr5380_softc *));
void si_dma_free __P((struct ncr5380_softc *));
void si_dma_poll __P((struct ncr5380_softc *));
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