108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Van Jacobson of Lawrence Berkeley Laboratory.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)scsivar.h 7.1 (Berkeley) 5/8/90
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* $Id: scsivar.h,v 1.8 1994/02/28 06:06:29 chopps Exp $
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*/
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/*
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* The largest single request will be MAXPHYS bytes which will require
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* at most MAXPHYS/NBPG+1 chain elements to describe, i.e. if none of
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* the buffer pages are physically contiguous (MAXPHYS/NBPG) and the
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* buffer is not page aligned (+1).
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*/
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#define DMAMAXIO (MAXPHYS/NBPG+1)
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struct dma_chain {
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int dc_count;
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char *dc_addr;
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};
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struct scsi_softc {
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struct amiga_ctlr *sc_ac;
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struct devqueue sc_dq;
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struct devqueue sc_sq;
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dmafree_t dmafree;
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dmago_t dmago;
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dmanext_t dmanext;
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dmastop_t dmastop;
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char *dmabuffer;
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char *dmausrbuf;
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u_long dmausrlen;
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u_long dmamask;
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u_short bankmask;
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u_char sc_flags;
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u_long sc_clock_freq;
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/* one for each target */
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struct syncpar {
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u_char state;
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u_char period, offset;
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} sc_sync[8];
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u_char sc_scsi_addr;
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u_char sc_stat[2];
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u_char sc_msg[7];
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void *sc_hwaddr; /* pointer to controller-specific DMA registers */
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u_short dmatimo;
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u_short sc_cmd;
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int sc_tc;
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struct dma_chain *sc_cur;
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struct dma_chain *sc_last;
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struct dma_chain sc_chain[DMAMAXIO];
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};
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/* sc_flags */
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#define SCSI_IO 0x80 /* DMA I/O in progress */
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#define SCSI_ALIVE 0x01 /* controller initialized */
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#ifdef DEBUG
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#define SCSI_PAD 0x02 /* 'padded' transfer in progress */
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#endif
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#define SCSI_SELECTED 0x04 /* bus is in selected state. Needed for
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correct abort procedure. */
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#define SCSI_DMA24 0x10 /* controller can only DMA to ZorroII
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address space */
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#define SCSI_READ24 0x20 /* DMA input needs to be copied from
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ZorroII buffer to real buffer */
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#define SCSI_INTR 0x40 /* SCSI interrupt expected */
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/* sync states */
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#define SYNC_START 0 /* no sync handshake started */
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#define SYNC_SENT 1 /* we sent sync request, no answer yet */
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#define SYNC_DONE 2 /* target accepted our (or inferior) settings,
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or it rejected the request and we stay async */
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#ifdef DEBUG
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#define DDB_FOLLOW 0x04
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#define DDB_IO 0x08
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#endif
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