inquiry.h

来自「操作系统SunOS 4.1.3版本的源码」· C头文件 代码 · 共 173 行

#ident	"@(#)inquiry.h 1.1 92/07/30 SMI"
/*
 * Copyright (c) 1988, 1989, 1990 Sun Microsystems, Inc.
 */

#ifndef	_scsi_generic_inquiry_h
#define	_scsi_generic_inquiry_h

/*
 * SCSI Inquiry Data
 *
 * Format of data returned as a result of an INQUIRY command.
 * The actual values vary contingent on the contents of the
 * inq_rdf field- RDF_LEVEL0 means that only the first 4 bytes
 * are valid (but perhaps not even ISO, ECMA, or ANSI- essentially
 * all you can trust with level 0 is the the device type and whether
 * or not it is removable media).
 *
 * RDF_CCS means that this structure complies with CCS pseudo-spec.
 *
 * RDF_SCSI2 means that the structure complies with the SCSI-2 spec.
 *
 */



struct scsi_inquiry {

	/*
	 * byte 0
	 *
	 * Bits 7-5 are the Peripheral Device Qualifier
	 * Bits 4-0 are the Peripheral Device Type
	 *
	 */

	u_char	inq_dtype;

	/* byte 1 */
	u_char	inq_rmb		: 1,	/* removable media */
		inq_qual	: 7;	/* device type qualifier */

	/* byte 2 */
	u_char	inq_iso		: 2,	/* ISO version */
		inq_ecma	: 3,	/* ECMA version */
		inq_ansi	: 3;	/* ANSI version */

	/* byte 3 */
	u_char	inq_aenc	: 1,	/* async event notification cap. */
		inq_trmiop	: 1,	/* supports TERMINATE I/O PROC msg */
				: 2,	/* reserved */
		inq_rdf		: 4;	/* response data format */

	/* bytes 4-7 */

	u_char	inq_len;		/* additional length */
	u_char			: 8;	/* reserved */
	u_char			: 8;	/* reserved */
	u_char	inq_reladdr	: 1,	/* supports relative addressing */
		inq_wbus32	: 1,	/* supports 32 bit wide data xfers */
		inq_wbus16	: 1,	/* supports 16 bit wide data xfers */
		inq_sync	: 1,	/* supports synchronous data xfers */
		inq_linked	: 1,	/* supports linked commands */
				: 1,	/* reserved */
		inq_cmdque	: 1,	/* supports command queueing */
		inq_sftre	: 1;	/* supports Soft Reset option */

	/* bytes 8-35 */

	char	inq_vid[8];		/* vendor ID */

	char	inq_pid[16];		/* product ID */

	char	inq_revision[4];	/* revision level */

	/*
	 * Bytes 36-55 are vendor-specific.
	 * Bytes 56-95 are reserved.
	 * 96 to 'n' are vendor-specific parameter bytes
	 */
};

/*
 * Defined Peripheral Device Types
 */

#define	DTYPE_DIRECT		0x00
#define	DTYPE_SEQUENTIAL	0x01
#define	DTYPE_PRINTER		0x02
#define	DTYPE_PROCESSOR		0x03
#define	DTYPE_WORM		0x04
#define	DTYPE_RODIRECT		0x05
#define	DTYPE_SCANNER		0x06
#define	DTYPE_OPTICAL		0x07
#define	DTYPE_CHANGER		0x08
#define	DTYPE_COMM		0x09

/*
 * Device types 0x0A-0x1E are reserved
 */

#define	DTYPE_UNKNOWN		0x1F

#define	DTYPE_MASK		0x1F

/*
 * The peripheral qualifier tells us more about a particular device.
 * (DPQ == DEVICE PERIPHERAL QUALIFIER).
 */

#define	DPQ_POSSIBLE	0x00	/*
				 * The specified peripheral device type is
				 * currently connected to this logical unit.
				 * If the target cannot detrermine whether
				 * or not a physical device is currently
				 * connected, it shall also return this
				 * qualifier.
				 */

#define	DPQ_SUPPORTED	0x20	/*
				 * The target is capable of supporting the
				 * specified peripheral device type on this
				 * logical unit, however the the physical
				 * device is not currently connected to this
				 * logical unit.
				 */

#define	DPQ_NEVER	0x30	/*
				 * The target is not capable of supporting a
				 * physical device on this logical unit. For
				 * this peripheral qualifier, the peripheral
				 * device type will be set to DTYPE_UNKNOWN
				 * in order to provide compatibility with
				 * previous versions of SCSI.

#define	DPQ_VUNIQ	0x80	/*
				 * If this bit is set, this is a vendor
				 * unique qualifier.
				 */
/*
 * To maintain compatibility with previous versions
 * of inquiry data formats, if a device peripheral
 * qualifier states that the target is not capable
 * of supporting a physical device on this logical unit,
 * then the qualifier DPQ_NEVER is set, *AND* the
 * actual device type must be set to DTYPE_UNKNOWN.
 *
 * This may make for some problems with older drivers
 * that blindly check the entire first byte, where they
 * should be checking for only the least 5 bits to see
 * whether the correct type is at the specified nexus.
 */

#define	DTYPE_NOTPRESENT	(DPQ_NEVER | DTYPE_UNKNOWN)

/*
 * Defined Response Data Formats
 */

#define	RDF_LEVEL0		0x00
#define	RDF_CCS			0x01
#define	RDF_SCSI2		0x02


/*
 * Include in implementation specifuc
 * (non-generic) inquiry definitions.
 */

#include <scsi/impl/inquiry.h>

#endif	_scsi_generic_inquiry_h