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/* $NetBSD: siopvar.h,v 1.11 1995/08/18 15:28:14 chopps Exp $ */
/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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.
*
* @(#)siopvar.h 7.1 (Berkeley) 5/8/90
*/
#ifndef _SIOPVAR_H_
#define _SIOPVAR_H_
/*
* The largest single request will be MAXPHYS bytes which will require
* at most MAXPHYS/NBPG+1 chain elements to describe, i.e. if none of
* the buffer pages are physically contiguous (MAXPHYS/NBPG) and the
* buffer is not page aligned (+1).
*/
#define DMAMAXIO (MAXPHYS/NBPG+1)
/*
* Data Structure for SCRIPTS program
*/
struct siop_ds {
/*00*/ long scsi_addr; /* SCSI ID & sync */
/*04*/ long idlen; /* Identify message */
/*08*/ char *idbuf;
/*0c*/ long cmdlen; /* SCSI command */
/*10*/ char *cmdbuf;
/*14*/ long stslen; /* Status */
/*18*/ char *stsbuf;
/*1c*/ long msglen; /* Message */
/*20*/ char *msgbuf;
/*24*/ long msginlen; /* Message in */
/*28*/ char *msginbuf;
/*2c*/ long extmsglen; /* Extended message in */
/*30*/ char *extmsgbuf;
/*34*/ long synmsglen; /* Sync transfer request */
/*38*/ char *synmsgbuf;
struct {
/*3c*/ long datalen;
/*40*/ char *databuf;
} chain[DMAMAXIO];
};
/*
* ACB. Holds additional information for each SCSI command Comments: We
* need a separate scsi command block because we may need to overwrite it
* with a request sense command. Basicly, we refrain from fiddling with
* the scsi_xfer struct (except do the expected updating of return values).
* We'll generally update: xs->{flags,resid,error,sense,status} and
* occasionally xs->retries.
*/
struct siop_acb {
/*00*/ TAILQ_ENTRY(siop_acb) chain;
/*08*/ struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */
/*0c*/ int flags; /* Status */
#define ACB_FREE 0x00
#define ACB_ACTIVE 0x01
#define ACB_DONE 0x04
#define ACB_CHKSENSE 0x08
/*10*/ struct scsi_generic cmd; /* SCSI command block */
/*1c*/ struct siop_ds ds;
/*a0*/ void *iob_buf;
/*a4*/ u_long iob_curbuf;
/*a8*/ u_long iob_len, iob_curlen;
/*b0*/ u_char msgout[6];
/*b6*/ u_char msg[6];
/*bc*/ u_char stat[1];
/*bd*/ u_char status;
/*be*/ u_char dummy[2];
/*c0*/ int clen;
/*c4*/ char *daddr; /* Saved data pointer */
/*c8*/ int dleft; /* Residue */
};
/*
* Some info about each (possible) target on the SCSI bus. This should
* probably have been a "per target+lunit" structure, but we'll leave it at
* this for now. Is there a way to reliably hook it up to sc->fordriver??
*/
struct siop_tinfo {
int cmds; /* #commands processed */
int dconns; /* #disconnects */
int touts; /* #timeouts */
int perrs; /* #parity errors */
int senses; /* #request sense commands sent */
ushort lubusy; /* What local units/subr. are busy? */
u_char flags;
u_char period; /* Period suggestion */
u_char offset; /* Offset suggestion */
} tinfo_t;
struct siop_softc {
struct device sc_dev;
struct intrhand sc_ih;
struct evcnt sc_intrcnt;
u_char sc_istat;
u_char sc_dstat;
u_char sc_sstat0;
u_char sc_sstat1;
u_long sc_intcode;
struct scsi_link sc_link; /* proto for sub devices */
u_long sc_scriptspa; /* physical address of scripts */
siop_regmap_p sc_siopp; /* the SIOP */
u_long sc_active; /* number of active I/O's */
/* Lists of command blocks */
TAILQ_HEAD(acb_list, siop_acb) free_list,
ready_list,
nexus_list;
struct siop_acb *sc_nexus; /* current command */
struct siop_acb sc_acb[8]; /* the real command blocks */
struct siop_tinfo sc_tinfo[8];
u_short sc_clock_freq;
u_char sc_dcntl;
u_char sc_ctest7;
u_short sc_tcp[4];
u_char sc_flags;
u_char sc_sien;
u_char sc_dien;
u_char sc_minsync;
/* one for each target */
struct syncpar {
u_char state;
u_char sxfer;
u_char sbcl;
} sc_sync[8];
};
/* sc_flags */
#define SIOP_INTSOFF 0x80 /* Interrupts turned off */
#define SIOP_INTDEFER 0x40 /* Level 6 interrupt has been deferred */
#define SIOP_ALIVE 0x01 /* controller initialized */
#define SIOP_SELECTED 0x04 /* bus is in selected state. Needed for
correct abort procedure. */
/* sync states */
#define SYNC_START 0 /* no sync handshake started */
#define SYNC_SENT 1 /* we sent sync request, no answer yet */
#define SYNC_DONE 2 /* target accepted our (or inferior) settings,
or it rejected the request and we stay async */
#define MSG_CMD_COMPLETE 0x00
#define MSG_EXT_MESSAGE 0x01
#define MSG_SAVE_DATA_PTR 0x02
#define MSG_RESTORE_PTR 0x03
#define MSG_DISCONNECT 0x04
#define MSG_INIT_DETECT_ERROR 0x05
#define MSG_ABORT 0x06
#define MSG_REJECT 0x07
#define MSG_NOOP 0x08
#define MSG_PARITY_ERROR 0x09
#define MSG_BUS_DEVICE_RESET 0x0C
#define MSG_IDENTIFY 0x80
#define MSG_IDENTIFY_DR 0xc0 /* (disconnect/reconnect allowed) */
#define MSG_SYNC_REQ 0x01
#define STS_CHECKCOND 0x02 /* Check Condition (ie., read sense) */
#define STS_CONDMET 0x04 /* Condition Met (ie., search worked) */
#define STS_BUSY 0x08
#define STS_INTERMED 0x10 /* Intermediate status sent */
#define STS_EXT 0x80 /* Extended status valid */
void siop_minphys __P((struct buf *bp));
int siop_scsicmd __P((struct scsi_xfer *));
#endif /* _SIOPVAR_H */
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