scsi.h

早期freebsd实现

#define SCSI_CORRECTABLE_ERROR		0x18
#define SCSI_FILE_MARK			0x1c
#define SCSI_INVALID_COMMAND		0x20
#define SCSI_UNIT_ATTENTION		0x30
#define SCSI_END_OF_MEDIA		0x34

/*
 * The standard "extended" sense data returned by SCSI devices.  This
 * has an error field of 0x70, for a "class 7" error.
 */
typedef struct ScsiClass7Sense {
#if BYTE_ORDER == BIG_ENDIAN
	u_char	valid		:1;	/* Sense data is valid */
	u_char	error7		:7;	/* == 0x70 */
	u_char	pad1;			/* Also "segment number" for copy */
	u_char	fileMark	:1;	/* File mark on device */
	u_char	endOfMedia	:1;	/* End of media reached */
	u_char	badBlockLen	:1;	/* Block length mis-match (Exabyte) */
	u_char	pad2		:1;
	u_char	key		:4;	/* Sense keys defined below */
	u_char	info1;			/* Information byte 1 */
	u_char	info2;			/* Information byte 2 */
	u_char	info3;			/* Information byte 3 */
	u_char	info4;			/* Information byte 4 */
	u_char	length;			/* Number of additional info bytes */
#else
	u_char	error7		:7;	/* == 0x70 */
	u_char	valid		:1;	/* Sense data is valid */
	u_char	pad1;			/* Also "segment number" for copy */
	u_char	key		:4;	/* Sense keys defined below */
	u_char	pad2		:1;
	u_char	badBlockLen	:1;	/* Block length mis-match (Exabyte) */
	u_char	endOfMedia	:1;	/* End of media reached */
	u_char	fileMark	:1;	/* File mark on device */
	u_char	info1;			/* Information byte 1 */
	u_char	info2;			/* Information byte 2 */
	u_char	info3;			/* Information byte 3 */
	u_char	info4;			/* Information byte 4 */
	u_char	length;			/* Number of additional info bytes */
#endif
} ScsiClass7Sense;			/* 8 Bytes */

/*
 * Key values for standardized sense class 7. 
 */
#define SCSI_CLASS7_NO_SENSE		0
#define SCSI_CLASS7_RECOVERABLE		1
#define SCSI_CLASS7_NOT_READY		2
#define SCSI_CLASS7_MEDIA_ERROR		3
#define SCSI_CLASS7_HARDWARE_ERROR	4
#define SCSI_CLASS7_ILLEGAL_REQUEST	5

/*
 * These seem to have different meanings to different vendors....
 */
#define SCSI_CLASS7_MEDIA_CHANGE	6
#define SCSI_CLASS7_UNIT_ATTN		6

#define SCSI_CLASS7_WRITE_PROTECT	7
#define SCSI_CLASS7_BLANK_CHECK		8
#define SCSI_CLASS7_VENDOR		9
#define SCSI_CLASS7_POWER_UP_FAILURE	10
#define SCSI_CLASS7_ABORT		11
#define SCSI_CLASS7_EQUAL		12
#define SCSI_CLASS7_OVERFLOW		13
#define SCSI_CLASS7_RESERVED_14		14
#define SCSI_CLASS7_RESERVED_15		15

/*
 * Data return by the SCSI inquiry command. 
 */
typedef struct ScsiInquiryData {
#if BYTE_ORDER == BIG_ENDIAN
	u_char	type;		/* Peripheral Device type. See below. */
	u_char	rmb:1;		/* Removable Medium bit. */
	u_char	qualifier:7;	/* Device type qualifier. */
	u_char	version;	/* Version info. */
	u_char	reserved:4;	/* reserved. */
	u_char	format:4;	/* Response format. */
	u_char	length;		/* length of data returned. */
	u_char	reserved2[2];	/* Reserved */
	u_char	flags;		/* SCSI II flags (see below) */
	u_char	vendorID[8];	/* Vendor ID (ASCII) */
	u_char	productID[16];	/* Product ID (ASCII) */
	u_char	revLevel[4];	/* Revision level (ASCII) */
	u_char	revData[8];	/* Revision data (ASCII) */
#else
	u_char	type;		/* Peripheral Device type. See below. */
	u_char	qualifier:7;	/* Device type qualifier. */
	u_char	rmb:1;		/* Removable Medium bit. */
	u_char	version;	/* Version info. */
	u_char	format:4;	/* Response format. */
	u_char	reserved:4;	/* reserved. */
	u_char	length;		/* length of data returned. */
	u_char	reserved2[2];	/* Reserved */
	u_char	flags;		/* SCSI II flags (see below) */
	u_char	vendorID[8];	/* Vendor ID (ASCII) */
	u_char	productID[16];	/* Product ID (ASCII) */
	u_char	revLevel[4];	/* Revision level (ASCII) */
	u_char	revData[8];	/* Revision data (ASCII) */
#endif
} ScsiInquiryData;

/*
 * The SCSI Peripheral type ID codes as return by the SCSI_INQUIRY command.
 *
 * SCSI_DISK_TYPE - Direct Access Device.
 * SCSI_TAPE_TYPE - Sequential Access Device.
 * SCSI_PRINTER_TYPE - Printer Device.
 * SCSI_HOST_TYPE - Processor Device.
 * SCSI_WORM_TYPE - Write-Once Read-Multiple Device.
 * SCSI_ROM_TYPE - Read-Only Direct Access Device.
 * SCSI_SCANNER_TYPE - Scanner device.
 * SCSI_OPTICAL_MEM_TYPE - Optical memory device.
 * SCSI_MEDIUM_CHANGER_TYPE - Medium changer device.
 * SCSI_COMMUNICATIONS_TYPE - Communications device.
 * SCSI_NODEVICE_TYPE - Logical Unit not present or implemented.
 *
 * Note that codes 0xa-0x7e are reserved and 0x80-0xff are vendor unique.
 */
#define	SCSI_DISK_TYPE			0
#define	SCSI_TAPE_TYPE			1
#define	SCSI_PRINTER_TYPE		2
#define	SCSI_HOST_TYPE			3
#define	SCSI_WORM_TYPE			4
#define	SCSI_ROM_TYPE			5
#define	SCSI_SCANNER_TYPE		6
#define	SCSI_OPTICAL_MEM_TYPE		7
#define	SCSI_MEDIUM_CHANGER_TYPE	8
#define	SCSI_COMMUNICATIONS_TYPE	9
#define	SCSI_NODEVICE_TYPE		0x7f

/*
 * The SCSI I & II inquiry flags.
 *
 * SCSI_REL_ADR - Relative addressing supported.
 * SCSI_WIDE_32 - 32 bit wide SCSI bus transfers supported.
 * SCSI_WIDE_16 - 16 bit wide SCSI bus transfers supported.
 * SCSI_SYNC - Synchronous data transfers supported.
 * SCSI_LINKED - Linked commands supported.
 * SCSI_CMD_QUEUE - Tagged command queuing supported.
 * SCSI_SOFT_RESET - Soft RESET alternative suported.
 */
#define SCSI_REL_ADR		0x80
#define SCSI_WIDE_32		0x40
#define SCSI_WIDE_16		0x20
#define SCSI_SYNC		0x10
#define SCSI_LINKED		0x08
#define SCSI_CMD_QUEUE		0x02
#define SCSI_SOFT_RESET		0x01

/*
 * Standard header for SCSI_MODE_SENSE and SCSI_MODE_SELECT commands for tapes.
 */
typedef struct ScsiTapeModeSelectHdr {
	u_char	len;		/* length */
	u_char	media;		/* media type */
#if BYTE_ORDER == BIG_ENDIAN
	u_char	writeprot:1;	/* Write protected media */
	u_char	bufferedMode:3;	/* Type of buffer to be done. */
	u_char	speed:4;	/* Drive speed. */
#else
	u_char	speed:4;	/* Drive speed. */
	u_char	bufferedMode:3;	/* Type of buffer to be done. */
	u_char	writeprot:1;	/* Write protected media */
#endif
	u_char	length;		/* Block descriptor length. */
	u_char	density;	/* tape density code */
	u_char	blocks_2;	/* number of blocks (MSB) */
	u_char	blocks_1;	/* number of blocks */
	u_char	blocks_0;	/* number of blocks (LSB) */
	u_char	reserved;	/* */
	u_char	block_size2;	/* Tape block size (MSB) */
	u_char	block_size1;	/* Tape block size */
	u_char	block_size0;	/* Tape block size (LSB) */
	u_char	vendor[6];	/* vendor specific data */
} ScsiTapeModeSelectHdr;

/*
 * Definitions of SCSI messages.
 *
 * SCSI_COMMAND_COMPLETE - After a command has completed, successfully
 *	or not, this is returned to the host from the target.
 *
 * SCSI_EXTENDED_MSG - Indicates that a multi-byte message is being sent.
 *
 * The following messages are used with connect/disconnect:
 * SCSI_SAVE_DATA_POINTER - Sent from target to host to request saving
 *	of current DMA address and count.  Indicates a pending dis-connect.
 * SCSI_RESTORE_POINTER - Sent from the target to the host to request
 *	restoring pointers saved before a disconnect
 * SCSI_DISCONNECT - Sent from the target to the host to disconnect.
 * SCSI_ABORT - Sent from the host to the target to abort current request.
 * SCSI_MESSAGE_REJECT -  Indicates receipt, by either host or target, of
 *	an unimplemented message.
 * SCSI_NO_OP - Sent from host to target if it has no real message to send.
 * SCSI_MESSAGE_PARITY_ERROR - Sent from host to target on message parity error
 * SCSI_BUS_RESET - Sent from host to target to reset all current I/O
 *
 * SCSI_IDENTIFY - The low order two bits of this message type indicate
 *	the Logical Unit of the Target which is requesting a reconnect.
 * SCSI_DIS_REC_IDENTIFY - Sent from the host to a target to indicate
 *	is supports connect/dis-connect
 *	
 */
#define SCSI_COMMAND_COMPLETE		0x00
#define SCSI_EXTENDED_MSG		0x01
#define SCSI_SAVE_DATA_POINTER		0x02
#define SCSI_RESTORE_POINTERS		0x03
#define SCSI_DISCONNECT			0x04
#define SCSI_ABORT			0x06
#define SCSI_MESSAGE_REJECT		0x07
#define SCSI_NO_OP			0x08
#define SCSI_MESSAGE_PARITY_ERROR	0x09
#define SCSI_LINKED_CMD_COMPLETE	0x0A
#define SCSI_LINKED_FLAGED_CMD_COMPLETE	0x0B
#define SCSI_BUS_RESET			0x0C

#define SCSI_IDENTIFY			0x80
#define SCSI_DIS_REC_IDENTIFY		0xc0

/*
 * Extended message types (2nd byte of SCSI_EXTENDED_MSG).
 */
#define SCSI_MODIFY_DATA_PTR		0x00
#define SCSI_SYNCHRONOUS_XFER		0x01
#define SCSI_EXTENDED_IDENTIFY		0x02 /* only in SCSI I */
#define SCSI_WIDE_XFER			0x03

/*
 * Driver ioctl's for various scsi operations.
 */
#ifndef _IOCTL_
#include <sys/ioctl.h>
#endif

/*
 * Control for SCSI "format" mode.
 *
 * "Format" mode allows a privileged process to issue direct SCSI
 * commands to a drive (it is intended primarily to allow on-line
 * formatting).  SDIOCSFORMAT with a non-zero arg will put the drive
 * into format mode; a zero arg will take it out.  When in format
 * mode, only the process that issued the SDIOCFORMAT can read or
 * write the drive.
 *
 * In format mode, process is expected to
 *	- do SDIOCSCSICOMMAND to supply cdb for next SCSI op
 *	- do read or write as appropriate for cdb
 *	- if i/o error, optionally do SDIOCSENSE to get completion
 *	  status and sense data from last scsi operation.
 */

struct scsi_fmt_cdb {
	int	len;		/* cdb length (in bytes) */
	u_char	cdb[28];	/* cdb to use on next read/write */
};

struct scsi_fmt_sense {
	u_int	status;		/* completion status of last op */
	u_char	sense[32];	/* sense data (if any) from last op */
};

#define	SDIOCSFORMAT		_IOW('S', 0x1, int)
#define	SDIOCGFORMAT		_IOR('S', 0x2, int)
#define	SDIOCSCSICOMMAND	_IOW('S', 0x3, struct scsi_fmt_cdb)
#define	SDIOCSENSE		_IOR('S', 0x4, struct scsi_fmt_sense)

#ifdef KERNEL
/*
 * Routines.
 */
extern void scsiGroup0Cmd();
extern void scsiGroup1Cmd();
#endif /* KERNEL */

#endif /* _SCSI_H */