scsivar.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

	    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 sz_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 sz_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;
	/*
	 * SSUNIT/LOAD/UNLOAD Command
	 */
	struct sz_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 sz_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 sz_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 sz_modsel_cm {
	    u_char	sp:1;		/* Save Parameters (DISK only)	      */
	    u_char	mbz0:3;		/* Reserved (all)		      */
	    u_char	pf:1;		/* Page Format			      */
	    u_char	lun:3;		/* Logical Unit Number (all)	      */
	    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	speed:4;	/* Was mbz1 now speed		      */
	    u_char	bufmode:3;	/* Buffered Mode		      */
	    u_char		:1;	/* Reserved			      */
	    u_char	rdeclen;	/* Record Descriptor Length	      */
	/* Parameter List Block Descriptor */
	    u_char	density;	/* Was mbz2 now its density 	      */
	    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
	 */
	struct sz_trksel_cm {
	    u_char		:5;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	trkval;		/* Track Value			      */
	    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				      */
	}trksel;
	/*
	 * RESERVE UNIT Command
	 * RELEASE UNIT Command
	 */
	 struct sz_runit_cm {
	    u_char		:1;	/* Reserved			      */
	    u_char	thrdpdev:3;	/* Third Party Device		      */
	    u_char	thrdp:1;	/* Third Party			      */
	    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				      */
	}runit;
	/*
	 * DISK specific:
	 *	READ CAPACITY Command
	 *	Read/Write Long
	 */
	 struct sz_rdcap_cm {
	    u_char	reladr:1;	/* RelAdr (NOTE: spec dose not say!)  */
	    u_char		:4;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	lbaddr3;	/* Logical Block Address (MSB)	      */
	    u_char	lbaddr2;	/* Logical Block Address	      */
	    u_char	lbaddr1;	/* Logical Block Address	      */
	    u_char	lbaddr0;	/* Logical Block Address (LSB)	      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	pmi:1;		/* Partial Media Indicator	      */
	    u_char		:5;	/* Reserved			      */
	    u_char	mbz1:2;		/* Vendor Unique		      */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz2:2;		/* Vendor Unique		      */
	    u_char	pad[12];	/* Pad				      */
	}rdcap;
	 struct sz_rwl_cm {
	    u_char	reladr:1;	/* RelAdr (NOTE: spec dose not say!)  */
	    u_char		:4;	/* Reserved			      */
	    u_char	lun:3;		/* Logical Unit Number		      */
	    u_char	lbaddr3:7;	/* Logical Block Address (MSB)	      */
	    u_char	phad:1;		/* Physical Address Flag              */
	    u_char	lbaddr2;	/* Logical Block Address	      */
	    u_char	lbaddr1;	/* Logical Block Address	      */
	    u_char	lbaddr0;	/* Logical Block Address (LSB)	      */
	    u_char		:8;	/* Reserved			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	dspec:8; 	/* Drive specific byte 55:0 22/23:1   */
	    u_char	link:1;		/* Link				      */
	    u_char	flag:1;		/* Flag				      */
	    u_char		:4;	/* Reserved			      */
	    u_char	mbz2:2;		/* Vendor Unique		      */
	    u_char	pad[12];	/* Pad				      */
	}rwl;
    }cmd;
};

/*
 * Data Format Structure
 */
struct sz_datfmt {
    union {
	/*
	 * Extended Sense Data Format
	 */
	struct sz_exsns_dt {
	    u_char	errcode:4;	/* Error Code			      */
	    u_char	errclass:3;	/* Error Class			      */
	    u_char	valid:1;	/* Valid			      */
	    u_char	segnum;		/* Segment Number		      */
	    u_char	snskey:4;	/* Sense Key			      */
	    u_char		:1;	/* Reserved			      */
	    u_char	ili:1;		/* Illegal Length Indicator	      */
	    u_char	eom:1;		/* End of Medium		      */
	    u_char	filmrk:1;	/* Filemark			      */
	    u_char	infobyte3;	/* Information Byte (MSB)	      */
	    u_char	infobyte2;	/* Information Byte 		      */
	    u_char	infobyte1;	/* Information Byte 		      */
	    u_char	infobyte0;	/* Information Byte (LSB)	      */
	    u_char	asl;		/* Additional Sense Length	      */
	    union {			/* Additional sense bytes 	      */
		struct {		/* TAPE specific bytes		      */
		    u_char ctlr;	/* Controller internal error code     */
		    u_char drv0;	/* Drive error byte		      */
		    u_char drv1;	/* Drive error byte		      */
		    u_char pad[9];	/* Pad				      */
		} tz_asb;
		struct {		/* DISK specific bytes		      */
		    u_char rb1[4];	/* Reserved bytes		      */
		    u_char asc;		/* Additional Sense Code	      */
		    u_char rb2[5];	/* Reserved bytes		      */
		    u_char pad[2];	/* Pad				      */
		} rz_asb;
		struct {		/* CDROM specific bytes		      */
		    u_char rb1[4];	/* Reserved bytes		      */
		    u_char asc;		/* Additional Sense Code	      */
		    u_char rb2;		/* Reserved byte		      */
		    u_char frufld;	/* Field Replacable Unit failed	      */
		    u_char bitp:3;	/* Bit Pointer			      */
		    u_char bpv:1;	/* Bit Pointer Valid		      */
		    u_char vu:2;	/* Vendor Unique		      */
		    u_char cd:1;	/* Command / Data		      */
		    u_char fpv:1;	/* Field Pointer Valid		      */
		    u_char fpmsb;	/* Field Pointer (MSB)		      */
		    u_char fplsb;	/* Field Pointer (LSB)		      */
		    u_char pad[2];	/* Pad				      */
		} cd_asb;
	    } asb;
	    u_char	pad1[24];
	}exsns;
	/*
	 * READ BLOCK LIMITS Data
	 */
	struct sz_rd_blklim_dt {
	    u_char		:8;	/* Reserved			      */
	    u_char	maxreclen2;	/* Maximum Record Length (MSB)	      */
	    u_char	maxreclen1;	/* Maximum Record Length 	      */
	    u_char	maxreclen0;	/* Maximum Record Length (LSB)	      */
	    u_char	minreclen1;	/* Minimum Record Length (MSB)	      */
	    u_char	minreclen0;	/* Minimum Record Length (LSB)	      */
	    u_char	pad[14];	/* Pad				      */
	    u_char	pad1[24];
	}rdblim;
	/*
	 * DISK specific:
	 *	READ CAPACITY Data
	 */
	struct sz_rdcap_dt {
	    u_char	lbaddr3;	/* Logical block Address (MSB)	      */
	    u_char	lbaddr2;	/* Logical block Address	      */
	    u_char	lbaddr1;	/* Logical block Address	      */
	    u_char	lbaddr0;	/* Logical block Address (LSB)	      */
	    u_char	blklen3;	/* Block Length (MSB)		      */
	    u_char	blklen2;	/* Block Length			      */
	    u_char	blklen1;	/* Block Length			      */
	    u_char	blklen0;	/* Block Length (LSB)		      */
	    u_char	pad[12];	/* Pad				      */
	    u_char	pad1[24];
	}rdcap;
	/*
	 * INQUIRY Data
	 *
	 * NOTE: the RRD40 returns more data than we allocate space
	 *	 for, but the extra data is not needed by the driver
	 *	 so we don't bother to read it in.
	 */
	struct sz_inq_dt {
	    u_char	perfdt;		/* Peripheral Deice Type	      */
	    u_char	devtq:7;	/* Device Type Qualifier	      */
	    u_char	rmb:1;		/* Removable Media Bit		      */
	    u_char	version;	/* Version			      */
	    u_char		:8;	/* Reserved			      */
	    u_char	addlen;		/* Additional Length		      */
	    u_char	rsvd[3];	/* Reserved			      */
	    u_char	vndrid[8];	/* Vendor ID (ASCII)		      */
	    u_char	prodid[16];	/* Product ID (ASCII)		      */
	    u_char	revlvl[4];	/* Revision level (ASCII)	      */
	    u_char	revdata[8];	/* Revision data (ASCII)	      */
	}inq;
	/*
	 * MODE SENSE Data for TAPES
	 */
	struct sz_modsns_dt {
	/* Parameter List Header	*/
	    u_char	sdlen;		/* Sense Data Length		      */
	    u_char	mbz1:8;		/* Must be Zero			      */