scsivar.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef	SCSIVAR_INCLUDE
#define	SCSIVAR_INCLUDE	1

/*
 *	1/3/91	(ULTRIX)	@(#)scsivar.h	4.5
 */

/************************************************************************
 *									*
 *			Copyright (c) 1986, 1988 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.	*
 *									*
 ************************************************************************/

/************************************************************************
 * scsivar.h	06-Jun-88
 *
 * Modification History
 *
 * 20-Nov-90	Robin Miller
 *   o	Added support for 10-byte READ/WRITE CDB's.
 *   o	Added SCSI Group definitions for use by sz_cdb_length() funtion.
 *   o	Removed all CD-ROM audio commands (conflict with psuedo commands).
 *
 * 16-Aug-90	Robin Miller
 *	Added commands to support audio portion of CD-ROM's.
 *
 * 05-Jul-90	Bill Dallas
 *	Got rid of some of the mbz fields and renamed
 *
 * 13-Nov-89    Janet L. Schank
 *      Added the define DEFAULT_SCSIID which is used as the system's
 *      default scsi id.
 *
 * 16-Jul-89	Fred Canter
 *	Add sz_rzmodsns_dt to datfmt structure. So mode sense can
 *	be used to get disk geometry.
 *
 * 14-Jul-89	Fred Canter
 *	Merged Dynamic BBR and error log changes.
 *
 * 13-Jul-89	Fred Canter
 *	Remove pf bit from mode sense command structure. Adding it
 *	was an error.
 *
 * 23-Jun-89	John A. Gallant
 *	Added read/write long structure definitions
 *
 * 24-May-89	Fred Canter
 *	Added PF bit to mode select structure (for new rzdisk).
 *
 * 17-Dec-88	Fred Canter
 *	Added pseudo commands to resolve the conflict between
 *	SZ_UNLOAD and SZ_SSUNIT both being opcode 0x1b.
 *
 * 03-Nov-88	Alan Frechette
 *	Added in support for disk maintainence. Added the commands
 *	FORMAT UNIT, REASSIGN BLOCK, READ DEFECT DATA, and VERIFY DATA.
 *	Changed values of the pseudo opcodes because they conflicted
 *	with READ DEFECT DATA.
 *
 * 16-Oct-88	Fred Canter
 *	Clean up comments.
 *
 * 28-Sep-88	Fred Canter
 *	Clean up comments.
 *
 * 21-Aug-88	Fred Canter
 *	Added new message definitions as part of message error handling.
 *
 * 16-Aug-88	Fred Canter
 *	Merge 5380 and SII SCSI drivers.
 *
 * 08-Aug-88	Fred Canter
 *	Add SZ_BUSY status code.
 *
 * 18-Jul-88	Fred Canter
 *	Added extended message handling.
 *
 * 28-Jun-88	Fred Canter
 *	Add new error code for improved ??command() error handling.
 *
 * 18-Jun-88	Fred Canter
 *	Changed max request sense data length from 11 to 20 to
 *	allow receiving all available sense data.
 *
 * 06-Jun-88	Fred Canter
 *	Created this header file for scsi.c from stcvar.h.
 *
 ************************************************************************/


/*
 * Some commands are common to disks and tapes, some are not.
 * Disk unique commands begin with "d_", tape commands with "t_".
 * Common commands have no "_" before the name.
 */
struct sz_cmdfmt {
    u_char opcode;			/* SCSI comand opcode		      */
    /*
     * Overlaid portion of commands
     */
    union {
	/* 
	 * TEST UNIT READY Command
	 * READ BLOCK LIMITS Command
	 */
	struct sz_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 sz_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 sz_sense_cm {
	    u_char		:5;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	pgcode:6;	/* Page code			      */
	    u_char	pcf:2;		/* PCF 			              */
	    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;
	/*
	 * TAPE specific:
	 * 	READ Command
	 * 	WRITE Command
	 * 	RECOVER BUFFERED DATA Command
	 */
	struct sz_trw_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				      */
	}t_rw;
	/*
	 * DISK specific:
	 * 	READ Command
	 * 	WRITE Command
	 * 	RECOVER BUFFERED DATA Command
	 *	READ DEFECT DATA Command
	 *	FORMAT UNIT Command
	 *	REASSIGN BLOCK Command
	 *	VERIFY DATA Command
	 */
	struct sz_drw_cm {
	    u_char	lbaddr2:5;	/* Logical Block Address (MSB)	      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	lbaddr1;	/* Logical Block Address	      */
	    u_char	lbaddr0;	/* Logical Block Address (LSB)	      */
	    u_char	xferlen;	/* Transfer Length (# of LBNs)	      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz:2;		/* Must be Zero (VU)		      */
	    u_char	pad[16];	/* Pad				      */
	}d_rw;

	/*
	 * Disk Read / Write 10-byte CDB.
	 */
	struct sz_drw10_cm {
	    u_char reladr	: 1;	/* Relative Address bit		[1] */
	    u_char		: 4;	/* Reserved			    */
	    u_char lun		: 3;	/* Logical Unit Number		    */
	    u_char lbaddr3;		/* Logical Block Address	[2] */
	    u_char lbaddr2;		/* Logical Block Address	[3] */
	    u_char lbaddr1;		/* Logical Block Address	[4] */
	    u_char lbaddr0;		/* Logical Block Address	[5] */
	    u_char		: 8;	/* Reserved			[6] */
	    u_char xferlen1;		/* Transfer Length    		[7] */
	    u_char xferlen0;		/* Transfer Length    		[8] */
	    u_char link		: 1;	/* Link				[9] */
	    u_char flag		: 1;	/* Flag				    */
	    u_char		: 4;	/* Reserved			    */
	    u_char mbz		: 2;	/* Must be Zero			    */
	    u_char pad[12];		/* Pad				    */
	} d_rw10;

	struct sz_drdd_cm {
	    u_char		:5;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	dlf:3;		/* Defect List Format  		      */
	    u_char	g:1;		/* Grown Defect List Bit	      */
	    u_char	m:1;		/* Manufacturers Defect List Bit      */
	    u_char		:3;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	alclen1;	/* Allocation Length  		      */
	    u_char	alclen0;	/* 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[12];	/* Pad				      */
	}d_rdd;
	struct sz_dfu_cm {
	    u_char	dlf:3;		/* Defect List Format  		      */
	    u_char	cmplst:1;	/* Complete List Bit		      */
	    u_char	fmtdat:1;	/* Format Data Bit		      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	pattern;	/* Format Data Pattern 		      */
	    u_char	interleave1;	/* Interleave Factor 		      */
	    u_char	interleave0;	/* Interleave Factor 		      */
	    u_char	control;	/* Control Byte  		      */
	    u_char	pad[16];	/* Pad				      */
	}d_fu;
	struct sz_drb_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	control;	/* Control Byte  		      */
	    u_char	pad[16];	/* Pad				      */
	}d_rb;
	struct sz_dvd_cm {
	    u_char	reladr:1;	/* Relative Address bit		      */
	    u_char	bytchk:1;	/* Byte Check			      */
	    u_char		:3;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	lbaddr3;	/* Logical Block Address	      */
	    u_char	lbaddr2;	/* Logical Block Address	      */
	    u_char	lbaddr1;	/* Logical Block Address	      */
	    u_char	lbaddr0;	/* Logical Block Address	      */
	    u_char		:8;	/* Reserved			      */
	    u_char	verflen1;	/* Verification Length		      */
	    u_char	verflen0;	/* Verification 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[12];	/* Pad				      */
	}d_vd;

	/*
	 * WRITE FILEMARKS Command
	 */
	struct sz_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 sz_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)			      */