scsi_all.h

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/*
 * Largely written by Julian Elischer ([e-mail])
 * for TRW Financial Systems.
 *
 * TRW Financial Systems, in accordance with their agreement with Carnegie
 * Mellon University, makes this software available to CMU to distribute
 * or use in any manner that they see fit as long as this message is kept with
 * the software. For this reason TFS also grants any other persons or
 * organisations permission to use or modify this software.
 *
 * TFS supplies this software to be publicly redistributed
 * on the understanding that TFS is not responsible for the correct
 * functioning of this software in any circumstances.
 *
 * Ported to run under 386BSD by Julian Elischer ([e-mail]) Sept 1992
 *
 *	$Id: scsi_all.h,v 1.6.2.1 1999/05/09 01:27:31 ken Exp $
 */

/*
 * SCSI general  interface description
 */

#ifndef	_SCSI_SCSI_ALL_H
#define _SCSI_SCSI_ALL_H 1

#include <sys/cdefs.h>

/*
 * SCSI command format
 */

/*
 * Define dome bits that are in ALL (or a lot of) scsi commands
 */
#define SCSI_CTL_LINK		0x01
#define SCSI_CTL_FLAG		0x02
#define SCSI_CTL_VENDOR		0xC0
#define	SCSI_CMD_LUN		0xA0	/* these two should not be needed */
#define	SCSI_CMD_LUN_SHIFT	5	/* LUN in the cmd is no longer SCSI */

#define SCSI_MAX_CDBLEN		16	/* 
					 * 16 byte commands are in the 
					 * SCSI-3 spec 
					 */
#if defined(CAM_MAX_CDBLEN) && (CAM_MAX_CDBLEN < SCSI_MAX_CDBLEN)
#error "CAM_MAX_CDBLEN cannot be less than SCSI_MAX_CDBLEN"
#endif

/*
 * This type defines actions to be taken when a particular sense code is
 * received.  Right now, these flags are only defined to take up 16 bits,
 * but can be expanded in the future if necessary.
 */
typedef enum {
	SS_NOP      = 0x000000,	/* Do nothing */
	SS_RETRY    = 0x010000,	/* Retry the command */
	SS_FAIL     = 0x020000,	/* Bail out */
	SS_START    = 0x030000,	/* Send a Start Unit command to the device,
				 * then retry the original command.
				 */
	SS_TUR      = 0x040000,	/* Send a Test Unit Ready command to the
				 * device, then retry the original command.
				 */
	SS_MANUAL   = 0x050000,	/* 
				 * This error must be handled manually,
				 * i.e. the code must look at the asc and 
				 * ascq values and determine the proper
				 * course of action.
				 */
	SS_TURSTART = 0x060000, /*
				 * Send a Test Unit Ready command to the
				 * device, and if that fails, send a start 
				 * unit.
				 */
	SS_MASK     = 0xff0000
} scsi_sense_action;

typedef enum {
	SSQ_NONE		= 0x0000,
	SSQ_DECREMENT_COUNT	= 0x0100,  /* Decrement the retry count */
	SSQ_MANY		= 0x0200,  /* send lots of recovery commands */
	SSQ_RANGE		= 0x0400,  /*
					    * Yes, this is a hack.  Basically,
					    * if this flag is set then it
					    * represents an ascq range.  The
					    * "correct" way to implement the
					    * ranges might be to add a special
					    * field to the sense code table,
					    * but that would take up a lot of
					    * additional space.  This solution
					    * isn't as elegant, but is more 
					    * space efficient.
					    */
	SSQ_PRINT_SENSE		= 0x0800,
	SSQ_MASK		= 0xff00
} scsi_sense_action_qualifier;

/* Mask for error status values */
#define SS_ERRMASK	0xff

/* The default error action */
#define SS_DEF		SS_RETRY|SSQ_DECREMENT_COUNT|SSQ_PRINT_SENSE|EIO

/* Default error action, without an error return value */
#define SS_NEDEF	SS_RETRY|SSQ_DECREMENT_COUNT|SSQ_PRINT_SENSE

/* Default error action, without sense printing or an error return value */
#define SS_NEPDEF	SS_RETRY|SSQ_DECREMENT_COUNT

struct scsi_generic
{
	u_int8_t opcode;
	u_int8_t bytes[11];
};

struct scsi_request_sense
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t unused[2];
	u_int8_t length;
	u_int8_t control;
};

struct scsi_test_unit_ready
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t unused[3];
	u_int8_t control;
};

struct scsi_send_diag
{
	u_int8_t opcode;
	u_int8_t byte2;
#define	SSD_UOL		0x01
#define	SSD_DOL		0x02
#define	SSD_SELFTEST	0x04
#define	SSD_PF		0x10
	u_int8_t unused[1];
	u_int8_t paramlen[2];
	u_int8_t control;
};

struct scsi_sense
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t unused[2];
	u_int8_t length;
	u_int8_t control;
};

struct scsi_inquiry
{
	u_int8_t opcode;
	u_int8_t byte2;
#define	SI_EVPD 0x01
	u_int8_t page_code;
	u_int8_t reserved;
	u_int8_t length;
	u_int8_t control;
};

struct scsi_mode_sense_6
{
	u_int8_t opcode;
	u_int8_t byte2;
#define	SMS_DBD				0x08
	u_int8_t page;
#define	SMS_PAGE_CODE 			0x3F
#define SMS_VENDOR_SPECIFIC_PAGE	0x00
#define SMS_DISCONNECT_RECONNECT_PAGE	0x02
#define SMS_PERIPHERAL_DEVICE_PAGE	0x09
#define SMS_CONTROL_MODE_PAGE		0x0A
#define SMS_ALL_PAGES_PAGE		0x3F
#define	SMS_PAGE_CTRL_MASK		0xC0
#define	SMS_PAGE_CTRL_CURRENT 		0x00
#define	SMS_PAGE_CTRL_CHANGEABLE 	0x40
#define	SMS_PAGE_CTRL_DEFAULT 		0x80
#define	SMS_PAGE_CTRL_SAVED 		0xC0
	u_int8_t unused;
	u_int8_t length;
	u_int8_t control;
};

struct scsi_mode_sense_10
{
	u_int8_t opcode;
	u_int8_t byte2;		/* same bits as small version */
	u_int8_t page; 		/* same bits as small version */
	u_int8_t unused[4];
	u_int8_t length[2];
	u_int8_t control;
};

struct scsi_mode_select_6
{
	u_int8_t opcode;
	u_int8_t byte2;
#define	SMS_SP	0x01
#define	SMS_PF	0x10
	u_int8_t unused[2];
	u_int8_t length;
	u_int8_t control;
};

struct scsi_mode_select_10
{
	u_int8_t opcode;
	u_int8_t byte2;		/* same bits as small version */
	u_int8_t unused[5];
	u_int8_t length[2];
	u_int8_t control;
};

/*
 * When sending a mode select to a tape drive, the medium type must be 0.
 */
struct scsi_mode_hdr_6
{
	u_int8_t datalen;
	u_int8_t medium_type;
	u_int8_t dev_specific;
	u_int8_t block_descr_len;
};

struct scsi_mode_hdr_10
{
	u_int8_t datalen[2];
	u_int8_t medium_type;
	u_int8_t dev_specific;
	u_int8_t reserved[2];
	u_int8_t block_descr_len[2];
};

struct scsi_mode_block_descr
{
	u_int8_t density_code;
	u_int8_t num_blocks[3];
	u_int8_t reserved;
	u_int8_t block_len[3];
};

struct scsi_control_page {
	u_int8_t page_code;
	u_int8_t page_length;
	u_int8_t rlec;
#define SCB_RLEC			0x01	/*Report Log Exception Cond*/
	u_int8_t queue_flags;
#define SCP_QUEUE_ALG_MASK		0xF0
#define SCP_QUEUE_ALG_RESTRICTED	0x00
#define SCP_QUEUE_ALG_UNRESTRICTED	0x10
#define SCP_QUEUE_ERR			0x02	/*Queued I/O aborted for CACs*/
#define SCP_QUEUE_DQUE			0x01	/*Queued I/O disabled*/
	u_int8_t eca_and_aen;
#define SCP_EECA			0x80	/*Enable Extended CA*/
#define SCP_RAENP			0x04	/*Ready AEN Permission*/
#define SCP_UAAENP			0x02	/*UA AEN Permission*/
#define SCP_EAENP			0x01	/*Error AEN Permission*/
	u_int8_t reserved;
	u_int8_t aen_holdoff_period[2];
};

struct scsi_reserve
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t unused[2];
	u_int8_t length;
	u_int8_t control;
};

struct scsi_release
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t unused[2];
	u_int8_t length;
	u_int8_t control;
};

struct scsi_prevent
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t unused[2];
	u_int8_t how;
	u_int8_t control;
};
#define	PR_PREVENT 0x01
#define PR_ALLOW   0x00

struct scsi_sync_cache
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t begin_lba[4];
	u_int8_t reserved;
	u_int8_t lb_count[2];
	u_int8_t control;	
};


struct scsi_changedef
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t unused1;
	u_int8_t how;
	u_int8_t unused[4];
	u_int8_t datalen;
	u_int8_t control;
};

struct scsi_read_buffer
{
	u_int8_t opcode;
	u_int8_t byte2;
#define	RWB_MODE		0x07
#define	RWB_MODE_HDR_DATA	0x00
#define	RWB_MODE_DATA		0x02
#define	RWB_MODE_DOWNLOAD	0x04
#define	RWB_MODE_DOWNLOAD_SAVE	0x05
        u_int8_t buffer_id;
        u_int8_t offset[3];
        u_int8_t length[3];
        u_int8_t control;
};

struct scsi_write_buffer
{
	u_int8_t opcode;
	u_int8_t byte2;
	u_int8_t buffer_id;
	u_int8_t offset[3];
	u_int8_t length[3];
	u_int8_t control;
};

struct scsi_rw_6
{
	u_int8_t opcode;
	u_int8_t addr[3];
/* only 5 bits are valid in the MSB address byte */
#define	SRW_TOPADDR	0x1F
	u_int8_t length;
	u_int8_t control;
};

struct scsi_rw_10
{
	u_int8_t opcode;
#define	SRW10_RELADDR	0x01
#define SRW10_FUA	0x08
#define	SRW10_DPO	0x10
	u_int8_t byte2;
	u_int8_t addr[4];
	u_int8_t reserved;
	u_int8_t length[2];
	u_int8_t control;
};

struct scsi_rw_12
{
	u_int8_t opcode;
#define	SRW12_RELADDR	0x01
#define SRW12_FUA	0x08
#define	SRW12_DPO	0x10
	u_int8_t byte2;
	u_int8_t addr[4];
	u_int8_t reserved;
	u_int8_t length[4];
	u_int8_t control;
};

struct scsi_start_stop_unit
{
	u_int8_t opcode;
	u_int8_t byte2;
#define	SSS_IMMED		0x01
	u_int8_t reserved[2];
	u_int8_t how;
#define	SSS_START		0x01
#define	SSS_LOEJ		0x02
	u_int8_t control;
};

#define SC_SCSI_1 0x01
#define SC_SCSI_2 0x03

/*
 * Opcodes
 */

#define	TEST_UNIT_READY		0x00
#define REQUEST_SENSE		0x03
#define	READ_6			0x08
#define WRITE_6			0x0a
#define INQUIRY			0x12
#define MODE_SELECT_6		0x15
#define MODE_SENSE_6		0x1a
#define START_STOP_UNIT		0x1b
#define START_STOP		0x1b
#define RESERVE      		0x16
#define RELEASE      		0x17
#define PREVENT_ALLOW		0x1e
#define	READ_CAPACITY		0x25
#define	READ_10			0x28
#define WRITE_10		0x2a
#define POSITION_TO_ELEMENT	0x2b
#define	SYNCHRONIZE_CACHE	0x35
#define	WRITE_BUFFER            0x3b
#define	READ_BUFFER             0x3c
#define	CHANGE_DEFINITION	0x40
#define	MODE_SELECT_10		0x55
#define	MODE_SENSE_10		0x5A
#define MOVE_MEDIUM     	0xa5
#define READ_12			0xa8
#define WRITE_12		0xaa
#define READ_ELEMENT_STATUS	0xb8


/*
 * Device Types
 */
#define T_DIRECT	0x00
#define T_SEQUENTIAL	0x01
#define T_PRINTER	0x02
#define T_PROCESSOR	0x03
#define T_WORM		0x04
#define T_CDROM		0x05
#define T_SCANNER 	0x06
#define T_OPTICAL 	0x07
#define T_CHANGER	0x08
#define T_COMM		0x09
#define T_ASC0		0x0a
#define T_ASC1		0x0b
#define	T_STORARRAY	0x0c
#define	T_ENCLOSURE	0x0d
#define T_NODEVICE	0x1F
#define	T_ANY		0xFF	/* Used in Quirk table matches */

#define T_REMOV		1
#define	T_FIXED		0

struct scsi_inquiry_data
{
	u_int8_t device;
#define	SID_TYPE(inq_data) ((inq_data)->device & 0x1f)
#define	SID_QUAL(inq_data) (((inq_data)->device & 0xE0) >> 5)
#define	SID_QUAL_LU_CONNECTED	0x00	/* The specified peripheral device
					 * type is currently connected to
					 * logical unit.  If the target cannot
					 * determine whether or not a physical
					 * device is currently connected, it
					 * shall also use this peripheral
					 * qualifier when returning the INQUIRY
					 * data.  This peripheral qualifier