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siopvar.h revision 1.2 
      1 /*
      2  * Copyright (c) 1990 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Van Jacobson of Lawrence Berkeley Laboratory.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	@(#)siopvar.h	7.1 (Berkeley) 5/8/90
     37  *	$Id: siopvar.h,v 1.2 1994/02/11 07:02:20 chopps Exp $
     38  */
     39 
     40 struct siop_ds {			/* Data Structure */
     41 	long	scsi_addr;		/* SCSI ID & sync */
     42 	long	idlen;			/* Identify message */
     43 	char	*idbuf;
     44 	long	cmdlen;			/* SCSI command */
     45 	char	*cmdbuf;
     46 	long	stslen;			/* Status */
     47 	char	*stsbuf;
     48 	long	msglen;			/* Message */
     49 	char	*msgbuf;
     50 	long	sdtrolen;		/* Sync Data Transfer Request out */
     51 	char	*sdtrobuf;
     52 	long	sdtrilen;		/* Sync Data Transfer Request in */
     53 	char	*sdtribuf;
     54 	struct {
     55 		long datalen;
     56 		char *databuf;
     57 	} chain[MAXPHYS/NBPG+1];
     58 };
     59 
     60 struct	siop_softc {
     61 	struct	amiga_ctlr *sc_ac;
     62 	struct	devqueue sc_dq;
     63 	struct	devqueue sc_sq;
     64 
     65 	/* should have one for each target? */
     66 	u_char	sc_istat;
     67 	u_char	sc_dstat;
     68 	u_char	sc_sstat0;
     69 	u_char	sc_sstat1;
     70 	struct siop_ds sc_ds;
     71 	u_char	sc_flags;
     72 	u_char	sc_lun;
     73 	u_long	sc_clock_freq;
     74 	/* one for each target */
     75 	struct syncpar {
     76 	  u_char state;
     77 	  u_char period, offset;
     78 	} sc_sync[8];
     79 	u_char	sc_slave;
     80 	u_char	sc_scsi_addr;
     81 	u_char	sc_stat[2];
     82 	u_char	sc_msg[8];
     83 };
     84 
     85 /* sc_flags */
     86 #define	SIOP_DMA	0x80	/* DMA I/O in progress */
     87 #define	SIOP_ALIVE	0x01	/* controller initialized */
     88 #define SIOP_SELECTED	0x04	/* bus is in selected state. Needed for
     89 				   correct abort procedure. */
     90 
     91 /* sync states */
     92 #define SYNC_START	0	/* no sync handshake started */
     93 #define SYNC_SENT	1	/* we sent sync request, no answer yet */
     94 #define SYNC_DONE	2	/* target accepted our (or inferior) settings,
     95 				   or it rejected the request and we stay async */
     96