scsivar.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

	    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)			      */
	    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;
	/*
	 * 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 control	: 5;	/* Diagnostic control bits.	[1] */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 8;	/* Reserved.			[2] */
	    u_char param_len1;		/* Allocation length (MSB).	[3] */
	    u_char param_len0;		/* Allocation length (LSB).	[4] */
	    u_char link		: 1;	/* Link.			[5] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz2		: 2;	/* Vendor Unique.		    */
	    u_char pad[16];		/* Pad.				    */
	} diag;
	/*
	 * RECEIVE DIAGNOSTIC RESULT Command
	 */
	struct sz_recdiag_cm {
	    u_char		: 5;	/* Reserved.			[1] */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 8;	/* Reserved.			[2] */
	    u_char alloc_len1;		/* Allocation length (MSB).	[3] */
	    u_char alloc_len0;		/* Allocation length (LSB).	[4] */
	    u_char link		: 1;	/* Link.			[5] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz2		: 2;	/* Vendor Unique.		    */
	    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 mbz 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 nbz2 now its the density code  */
	    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;

	/*
	 * PREVENT/ALLOW MEDIUM REMOVAL Command
	 */
	 struct sz_medremoval_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 prevent	: 1;	/* Prevent = 1, Allow = 0.	[4] */
	    u_char		: 7;	/* Reserved.			    */
	    u_char link		: 1;	/* Link.			[5] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz		: 2;	/* Must be Zero.		    */
	    u_char pad[16];		/* Pad.				    */
	} mr;

	/*
	 * START/STOP UNIT Command
	 */
	 struct sz_ssu_cm {
	    u_char immed	: 1;	/* Immediate 1 = True		[1] */
	    u_char		: 4;	/* Reserved.			    */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 8;	/* Reserved.			[2] */
	    u_char		: 8;	/* Reserved.			[3] */
	    u_char start	: 1;	/* Start = 1, Stop = 0.		[4] */
	    u_char loej		: 1;	/* Load/Eject = 1, 0 = No Affect.   */
	    u_char		: 6;	/* Reserved.			    */
	    u_char link		: 1;	/* Link.			[5] */
	    u_char flag		: 1;	/* Flag.			    */
	    u_char		: 4;	/* Reserved.			    */
	    u_char mbz		: 2;	/* Must be Zero.		    */
	    u_char pad[16];		/* Pad.				    */
	} ssu;

	/*
	 * DISK specific:
	 *	READ CAPACITY Command
	 *	Read/Write Long
	 */
	 struct sz_rdcap_cm {
	    u_char	reladr:1;	/* RelAdr (TODO1: spec don't 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;

	/*
	 * CD-ROM: Play Audio MSF Command.
	 */
	 struct sz_play_audio_msf_cm {
	    u_char		: 5;	/* Reserved.			[1] */
	    u_char lun		: 3;	/* Logical Unit Number.		    */
	    u_char		: 8;	/* Reserved.			[2] */
	    u_char starting_M_unit;	/* Starting M-unit.		[3] */
	    u_char starting_S_unit;	/* Starting S-unit.		[4] */
	    u_char starting_F_unit;	/* Starting F-unit.		[5] */
	    u_char ending_M_unit;	/* Ending M-unit.		[6] */
	    u_char ending_S_unit;	/* Ending S-unit.		[7] */
	    u_char ending_F_unit;	/* Ending F-unit.		[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.				    */
	} msf;

	/*
	 * CD-ROM: Play Audio Track/Index Command.
	 */
	 struct sz_play_audio_ti_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 ending_track;	/* Ending Track.		[7] */
	    u_char ending_index;	/* Ending Index			[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.				    */
	} ti;

	/*
	 * CD-ROM: Play Audio Track Relative Command.
	 */
	 struct sz_play_audio_tr_cm {
	    u_char		: 5;	/* Reserved.			[1] */
	    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 starting_track;	/* Starting Track.		[6] */
	    u_char xfer_len1;		/* Transfer Length    		[7] */
	    u_char xfer_len0;		/* Transfer Length    		[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.				    */
	} tr;

	/*
	 * CD-ROM: Pause/Resume Command.
	 */
	 struct sz_pause_resume_cm {
	    u_char		: 5;	/* Reserved.			[1] */
	    u_char lun		: 3;	/* Logical Unit Number.		    */