stcvar.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*
 *	7/2/90	(ULTRIX)	@(#)stcvar.h	4.1
 */

/************************************************************************
 *									*
 *			Copyright (c) 1986 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *                                                                      *
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/

/************************************************************************
 * stcvar.h	06-Jun-86
 *
 * Modification History
 *
 * 20-Aug-87	darrell
 *	Added the structure definition for the RECEIVE DIAGNOSTIC
 *	RESULT data.
 *
 * 03-Mar-87	darrell
 *	Fixed an oversight where the command and data structures where
 *	allocating space.
 *
 * 27-Jan-87	darrell
 *	Changed the st_modsel_cm structure to reflect the change in
 *	V32 TZK50 ucode that defines a vendor unique bit that disables
 *	reselect timeouts.
 *
 * 15-Jan-87	darrell
 *	Added definitions and structure changes to support the
 *	rewrite of stc.c that is being sbmitted at the same
 *	time.
 *
 * 26-Sep-86	darrell
 *	Added more constant definitions and a macro to timeout 
 *	spin loops.
 *
 *  5-Sep-86	darrell
 *	Added more constant definition.
 *
 *  4-Sep-86	darrell
 *	First semi-working driver.
 *
 *  6-Aug-86	darrell
 *	Updated for first pass of real driver (compiles but not debugged).
 *
 * 06-Jun-86	darrell 
 *	creation of this file.
 *
 ************************************************************************/


struct st_cmdfmt {
    u_char opcode;			/* SCSI comand opcode		      */
    /*
     * Overlaid portion of commands
     */
    union {
	/* 
	 * TEST UNIT READY Command
	 * READ BLOCK LIMITS Command
	 */
	struct st_tur_cm {
	    u_char		:5;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:4;		/* Flag				      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}tur;
	/*
	 * REWIND Command
	 */
	struct st_rewind_cm {
	    u_char	immed:1;	/* Immediate			      */
	    u_char		:4;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}rwd;
	/*
	 * REQUEST SENSE Command
	 * MODE SENSE Command
	 * INQUIRY Command
	 */
	struct st_sense_cm {
	    u_char		:5;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	alclen;		/* Allocation Length		      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}sense;
	/*
	 * READ Command
	 * WRITE Command
	 * RECOVER BUFFERED DATA Command
	 */
	struct st_rw_cm {
	    u_char	fixed:1;	/* Fixed			      */
	    u_char		:4;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	xferlen2;	/* Transfer Length (MSB)	      */
	    u_char	xferlen1;	/* Transfer Length		      */
	    u_char	xferlen0;	/* Transfer Length (LSB)	      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}rw;
	/*
	 * WRITE FILEMARKS Command
	 */
	struct st_wfm_cm {
	    u_char		:5;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	numoffmks2;	/* Number of Filemarks (MSB)	      */
	    u_char	numoffmks1;	/* Number of Filemarks		      */
	    u_char	numoffmks0;	/* Number of Filemarks (LSB)	      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}wfm;
	/*
	 * SPACE Command
	 */
	struct st_space_cm {
	    u_char	code:2;		/* Fixed			      */
	    u_char		:3;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	count2;		/* Count (MSB)			      */
	    u_char	count1;		/* Count			      */
	    u_char	count0;		/* Count (LSB)			      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}space;
	/*
	 * VERIFY Command
	 */
	struct st_vfy_cm {
	    u_char	fixed:1;	/* Fixed			      */
	    u_char	bytcmp:1;	/* Byte Compare			      */
	    u_char		:3;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	verflen2;	/* Verification Length (MSB)	      */
	    u_char	verflen1;	/* Verification Length		      */
	    u_char	verflen0;	/* Verification Length (LSB)	      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}vfy;
	/*
	 * ERASE Command
	 */
	struct st_era_cm {
	    u_char	longbit:1;	/* Long				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}erase;
	/*
	 * LOAD/UNLOAD Command
	 */
	struct st_ld_cm {
	    u_char	immed:1;	/* Immediate			      */
	    u_char		:4;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	load:1;		/* Load				      */
	    u_char	reten:1;	/* Retention			      */
	    u_char		:6;	/* Reserved			      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}ld;
	/*
	 * SEND DIAGNOSTIC Command
	 */
	struct st_snd_diag_cm {
	    u_char	unitofl:1;	/* Unit Offline			      */
	    u_char	devofl:1;	/* Device Offline		      */
	    u_char	selftst:1;	/* Self Test			      */
	    u_char		:2;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char	mbz1[2];	/* Must be Zero			      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}diag;
	/*
	 * RECEIVE DIAGNOSTIC RESULT Command
	 */
	struct st_recdiag_cm {
	    u_char		:5;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char	aloclen1;	/* Allocation Length (MSB)	      */
	    u_char	aloclen0;	/* Allocation Length (LSB)_	      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	    u_char	pad[16];	/* Pad				      */
	}recdiag;
	/*
	 * MODE SELECT Command
	 */
	struct st_modsel_cm {
	    u_char		:5;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	pll;		/* Parameter List Length	      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero			      */
	/* Parameter List Header	*/
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	mbz1:4;		/* Must be Zero			      */
	    u_char	bufmode:3;	/* Buffered Mode		      */
	    u_char		:1;	/* Reserved			      */
	    u_char	rdeclen;	/* Record Descriptor Length	      */
	/* Parameter List Block Descriptor */
	    u_char	mbz2;		/* Must be Zero			      */
	    u_char	numofrec2;	/* Number of Records (MSB)	      */
	    u_char	numofrec1;	/* Number of Records 		      */
	    u_char	numofrec0;	/* Number of Records (LSB)	      */
	    u_char		:8;	/* Reserved			      */
	    u_char	reclen2;	/* Record Length (MSB)		      */
	    u_char	reclen1;	/* Record Length 		      */
	    u_char	reclen0;	/* Record Length (LSB)		      */
	    u_char	vulen;		/* Vendor Unique Length		      */
	    u_char	nof:3;		/* Enable Fillers		      */
	    u_char	mbz3:3;		/* Must be Zero			      */
	    u_char	notimo:1;	/* Disable Reselect timeouts	      */
	    u_char	vu7:1;		/* Direct Track Access		      */
	    u_char	pad[2];		/* Pad				      */
	}modsel;
	/*
	 * Track SELECT Command
	 */