207 lines
6.7 KiB
C
207 lines
6.7 KiB
C
/* $NetBSD: siopvar.h,v 1.2 1999/02/21 18:10:10 scw Exp $ */
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/*
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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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* @(#)siopvar.h 7.1 (Berkeley) 5/8/90
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*/
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#ifndef _SIOPVAR_H_
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#define _SIOPVAR_H_
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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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/*
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* Data Structure for SCRIPTS program
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*/
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struct siop_ds {
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long scsi_addr; /* SCSI ID & sync */
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long idlen; /* Identify message */
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char *idbuf;
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long cmdlen; /* SCSI command */
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char *cmdbuf;
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long stslen; /* Status */
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char *stsbuf;
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long msglen; /* Message */
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char *msgbuf;
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long msginlen; /* Message in */
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char *msginbuf;
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long extmsglen; /* Extended message in */
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char *extmsgbuf;
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long synmsglen; /* Sync transfer request */
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char *synmsgbuf;
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struct {
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long datalen;
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char *databuf;
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} chain[DMAMAXIO];
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};
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/*
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* ACB. Holds additional information for each SCSI command Comments: We
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* need a separate scsi command block because we may need to overwrite it
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* with a request sense command. Basicly, we refrain from fiddling with
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* the scsi_xfer struct (except do the expected updating of return values).
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* We'll generally update: xs->{flags,resid,error,sense,status} and
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* occasionally xs->retries.
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*/
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struct siop_acb {
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TAILQ_ENTRY(siop_acb) chain;
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struct scsipi_xfer *xs; /* SCSI xfer ctrl block from above */
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int flags; /* Status */
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#define ACB_FREE 0x00
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#define ACB_ACTIVE 0x01
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#define ACB_DONE 0x04
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#define ACB_CHKSENSE 0x08
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struct scsi_generic cmd; /* SCSI command block */
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struct siop_ds ds;
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void *iob_buf;
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u_long iob_curbuf;
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u_long iob_len, iob_curlen;
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u_char msgout[6];
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u_char msg[6];
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u_char stat[1];
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u_char status;
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u_char dummy[2];
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int clen;
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char *daddr; /* Saved data pointer */
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int dleft; /* Residue */
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};
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/*
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* Some info about each (possible) target on the SCSI bus. This should
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* probably have been a "per target+lunit" structure, but we'll leave it at
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* this for now. Is there a way to reliably hook it up to sc->fordriver??
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*/
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struct siop_tinfo {
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int cmds; /* #commands processed */
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int dconns; /* #disconnects */
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int touts; /* #timeouts */
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int perrs; /* #parity errors */
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int senses; /* #request sense commands sent */
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ushort lubusy; /* What local units/subr. are busy? */
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u_char flags;
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u_char period; /* Period suggestion */
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u_char offset; /* Offset suggestion */
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} tinfo_t;
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struct siop_softc {
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struct device sc_dev;
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u_char sc_istat;
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u_char sc_dstat;
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u_char sc_sstat0;
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u_char sc_sstat1;
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u_long sc_intcode;
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struct scsipi_link sc_link; /* proto for sub devices */
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struct scsipi_adapter sc_adapter;
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u_long sc_scriptspa; /* physical address of scripts */
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siop_regmap_p sc_siopp; /* the SIOP */
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u_long sc_active; /* number of active I/O's */
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/* Lists of command blocks */
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TAILQ_HEAD(acb_list, siop_acb) free_list,
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ready_list,
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nexus_list;
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struct siop_acb *sc_nexus; /* current command */
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#define SIOP_NACB 8
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struct siop_acb *sc_acb; /* the real command blocks */
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struct siop_tinfo sc_tinfo[8];
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u_short sc_clock_freq;
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u_char sc_dcntl;
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u_char sc_ctest7;
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u_short sc_tcp[4];
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u_char sc_flags;
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u_char sc_sien;
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u_char sc_dien;
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u_char sc_minsync;
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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 sxfer;
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u_char sbcl;
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} sc_sync[8];
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};
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/* sc_flags */
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#define SIOP_INTSOFF 0x80 /* Interrupts turned off */
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#define SIOP_INTDEFER 0x40 /* Level 6 interrupt has been deferred */
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#define SIOP_ALIVE 0x01 /* controller initialized */
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#define SIOP_SELECTED 0x04 /* bus is in selected state. Needed for
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correct abort procedure. */
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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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#define MSG_CMD_COMPLETE 0x00
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#define MSG_EXT_MESSAGE 0x01
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#define MSG_SAVE_DATA_PTR 0x02
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#define MSG_RESTORE_PTR 0x03
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#define MSG_DISCONNECT 0x04
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#define MSG_INIT_DETECT_ERROR 0x05
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#define MSG_ABORT 0x06
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#define MSG_REJECT 0x07
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#define MSG_NOOP 0x08
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#define MSG_PARITY_ERROR 0x09
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#define MSG_BUS_DEVICE_RESET 0x0C
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#define MSG_IDENTIFY 0x80
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#define MSG_IDENTIFY_DR 0xc0 /* (disconnect/reconnect allowed) */
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#define MSG_SYNC_REQ 0x01
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#define STS_CHECKCOND 0x02 /* Check Condition (ie., read sense) */
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#define STS_CONDMET 0x04 /* Condition Met (ie., search worked) */
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#define STS_BUSY 0x08
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#define STS_INTERMED 0x10 /* Intermediate status sent */
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#define STS_EXT 0x80 /* Extended status valid */
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void siop_minphys __P((struct buf *bp));
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int siop_scsicmd __P((struct scsipi_xfer *));
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void siopinitialize __P((struct siop_softc *));
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void siopintr __P((struct siop_softc *));
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#ifdef DEBUG
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void siop_dump __P((struct siop_softc *));
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#endif
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#endif /* _SIOPVAR_H */
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