scsivar.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

	    u_char		: 8;	/* Reserved.			[2] */
	    u_char		: 8;	/* Reserved.			[3] */
	    u_char 		: 8;	/* Reserved.			[4] */
	    u_char 		: 8;	/* Reserved.			[5] */
	    u_char		: 8;	/* Reserved.			[6] */
	    u_char 		: 8;	/* Reserved.			[7] */
	    u_char resume	: 1;	/* Resume = 1, Pause = 0.	[8] */
	    u_char 		: 7;	/* Reserved.			    */
	    u_char link		: 1;	/* Link.			[9] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz2		: 2;	/* Vendor Unique.		    */
	    u_char pad[12];		/* Pad.				    */
	} pr;

	/*
	 * CD-ROM: Read TOC Command.
	 */
	 struct sz_read_toc_cm {
	    u_char		: 1;	/* Reserved.			[1] */
	    u_char msf		: 1;	/* Report address in MSF format.    */
	    u_char		: 3;	/* Reserved.			    */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 8;	/* Reserved.			[2] */
	    u_char		: 8;	/* Reserved.			[3] */
	    u_char 		: 8;	/* Reserved.			[4] */
	    u_char 		: 8;	/* Reserved.			[5] */
	    u_char starting_track;	/* Reserved.			[6] */
	    u_char alloc_len1;		/* Allocation length (MSB).	[7] */
	    u_char alloc_len0;		/* Allocation length (LSB).	[8] */
	    u_char link		: 1;	/* Link.			[9] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz2		: 2;	/* Vendor Unique.		    */
	    u_char pad[12];		/* Pad.				    */
	} toc;

	/*
	 * CD-ROM: Read Sub-Channel Command.
	 */
	 struct sz_read_subc_cm {
	    u_char		: 1;	/* Reserved.			[1] */
	    u_char msf		: 1;	/* Report address in MSF format.    */
	    u_char		: 3;	/* Reserved.			    */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 6;	/* Reserved.			[2] */
	    u_char subQ		: 1;	/* Sub-Q Channel Data.		    */
	    u_char		: 1;	/* Reserved.			    */
	    u_char data_format;		/* Reserved.			[3] */
	    u_char 		: 8;	/* Reserved.			[4] */
	    u_char 		: 8;	/* Reserved.			[5] */
	    u_char track_number;	/* Reserved.			[6] */
	    u_char alloc_len1;		/* Allocation length (MSB).	[7] */
	    u_char alloc_len0;		/* Allocation length (LSB).	[8] */
	    u_char link		: 1;	/* Link.			[9] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz2		: 2;	/* Vendor Unique.		    */
	    u_char pad[12];		/* Pad.				    */
	} sch;

	/*
	 * CD-ROM: Read Header Command/
	 */
	struct sz_read_header_cm {
	    u_char		: 1;	/* Reserved.			[1] */
	    u_char msf		: 1;	/* Report address in MSF format.    */
	    u_char		: 3;	/* 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 alloc_len1;		/* Allocation Length MSB.	[7] */
	    u_char alloc_len0;		/* Allocation Length LSB.	[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.				    */
	} rh;

	/*
	 * CD-ROM: Play Track Command.
	 */
	 struct sz_play_track_cm {
	    u_char		: 5;	/* Reserved.			[1] */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 8;	/* Reserved.			[2] */
	    u_char		: 8;	/* Reserved.			[3] */
	    u_char starting_track;	/* Starting track.		[4] */
	    u_char starting_index;	/* Starting index.		[5] */
	    u_char		: 8;	/* Reserved.			[6] */
	    u_char		: 8;	/* Reserved.			[7] */
	    u_char number_indexes;	/* Number of indexes.		[8] */
	    u_char link		: 1;	/* Link.			[9] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz2		: 2;	/* Vendor Unique.		    */
	    u_char pad[12];		/* Pad.				    */
	} pt;

	/*
	 * CD-ROM: Playback Control/Status Command.
	 */
	 struct sz_playback_cm {
	    u_char		: 5;	/* Reserved.			[1] */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 8;	/* Reserved.			[2] */
	    u_char		: 8;	/* Reserved.			[3] */
	    u_char 		: 8;	/* Reserved.			[4] */
	    u_char 		: 8;	/* Reserved.			[5] */
	    u_char		: 8;	/* Reserved.			[6] */
	    u_char alloc_len1;		/* Allocation length (MSB).	[7] */
	    u_char alloc_len0;		/* Allocation length (LSB).	[8] */
	    u_char link		: 1;	/* Link.			[9] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz2		: 2;	/* Vendor Unique.		    */
	    u_char pad[12];		/* Pad.				    */
	} pb;

	/*
	 * CD-ROM: Set Address Format Command.
	 */
	 struct sz_set_address_format_cm {
	    u_char		: 5;	/* Reserved.			[1] */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 8;	/* Reserved.			[2] */
	    u_char		: 8;	/* Reserved.			[3] */
	    u_char 		: 8;	/* Reserved.			[4] */
	    u_char 		: 8;	/* Reserved.			[5] */
	    u_char		: 8;	/* Reserved.			[6] */
	    u_char		: 8;	/* Reserved.			[7] */
	    u_char lbamsf	: 1;	/* Address Format 0/1 = LBA/MSF	[8] */
	    u_char		: 7;	/* Reserved.			    */
	    u_char link		: 1;	/* Link.			[9] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz2		: 2;	/* Vendor Unique.		    */
	    u_char pad[12];		/* Pad.				    */
	} saf;

    }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 {		/* CD-ROM 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
	 */
	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
	 */
	struct sz_modsns_dt {
	/* Parameter List Header	*/
	    u_char	sdlen;		/* Sense Data Length		      */
	    u_char	mbz1:8;		/* Must be Zero			      */
	    u_char	speed:4;	/* was mbz2 now speed 		      */
	    u_char	bufmode:3;	/* Buffered Mode		      */
	    u_char	wp:1;		/* Write Protect		      */
	    u_char	bdeclen;	/* Block Descriptor Length	      */
	/* Parameter List Block Descriptor */
	    u_char	density;	/* WAS mbz3 now density(tapes)        */
	    u_char	numofblk2;	/* Number of Blocks (MSB)	      */
	    u_char	numofblk1;	/* Number of Blocks 		      */
	    u_char	numofblk0;	/* Number of Blocks (LSB)	      */
	    u_char		:8;	/* Reserved			      */
	    u_char	blklen2;	/* Block Length (MSB)		      */
	    u_char	blklen1;	/* Block Length 		      */
	    u_char	blklen0;	/* Block Length (LSB)		      */
	    u_char	vulen;		/* Vendor Unique Length		      */
	    u_char	nof:2;		/* Enable Fillers		      */
	    u_char	mbz4:5;		/* Must be Zero			      */
	    u_char	vu7:1;		/* Direct Track Access		      */
	    u_char	pad[6];		/* Pad				      */
	    u_char	pad1[24];
	}modsns;
	/*
	 * MODE SENSE Data for DISKS
	 */
	struct sz_rzmodsns_dt {
	/* Parameter List Header	*/
	    u_char	sdlen;		/* Sense Data Length		      */
	    u_char	medtyp;		/* Medium Type			      */
	    u_char		: 7;	/* Reserved			      */
	    u_char	wp	: 1;	/* Write Protect		      */
	    u_char	bdlen;		/* Block Descriptor Length	      */
	/* Parameter List Block Descriptor */
	    u_char	dencode;	/* Density Code			      */
	    u_char	nblks2;		/* Number of Blocks (MSB)	      */
	    u_char	nblks1;		/* Number of Blocks 		      */
	    u_char	nblks0;		/* Number of Blocks (LSB)	      */
	    u_char		: 8;	/* Reserved			      */
	    u_char	blklen2;	/* Block Length (MSB)		      */
	    u_char	blklen1;	/* Block Length 		      */
	    u_char	blklen0;	/* Block Length (LSB)		      */
	/* Parameter List Page Data (32 bytes, one page only) */
	    u_char	mspage[32];	/* Page header and data		      */
	}rzmodsns;
	/*
	 * RECEIVE DIAGNOSTIC RESULT Data
	 */
	struct sz_recdiag_dt {
	    u_char	ctlr_hd_rev;	/* Controller hardware revision level */
	    u_char	ctlr_fw_rev;	/* Controller firmware revision level */
	    u_char	ctlr_selftest;	/* Controller selftest  0 = Passed    */
					/*                      1 = Failed    */
	    u_char	drv_hw_rev;	/* Drive hardware revision level      */
	    u_char	drv_fw_rev;	/* Drive firmware revision level      */
	    u_char	drv_selftest;	/* Drive selftest  0 = Passed	      */
					/*		  xx = Failure Code   */
	/* TODO1: why no pad? */
	}recdiag;
    }dat;
};

/*
 * Define Masks for SCSI Group Codes.
 */
#define	SCSI_GROUP_0		0x00	/* SCSI Group Code 0.		*/
#define SCSI_GROUP_1		0x20	/* SCSI Group Code 1.		*/