NetBSD/sys/arch/sun3/dev/sivar.h

90 lines
3.3 KiB
C

/* $NetBSD: sivar.h,v 1.1 1996/03/26 15:01:15 gwr Exp $ */
/*
* Copyright (c) 1995 David Jones, Gordon W. Ross
* All rights reserved.
*
* 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. The name of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* 4. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* David Jones and Gordon Ross
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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_reqlen; /* requested transfer length */
struct si_dma_handle *sc_dma;
/* DMA command block for the OBIO controller. */
void *sc_dmacmd;
};
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 *));