[linux.git] / include / scsi / scsi.h

/*
 * This header file contains public constants and structures used by
 * the SCSI initiator code.
 */
#ifndef _SCSI_SCSI_H
#define _SCSI_SCSI_H

#include <linux/types.h>
#include <linux/scatterlist.h>
#include <linux/kernel.h>
#include <scsi/scsi_common.h>
#include <scsi/scsi_proto.h>

struct scsi_cmnd;

enum scsi_timeouts {
	SCSI_DEFAULT_EH_TIMEOUT		= 10 * HZ,
};

/*
 * DIX-capable adapters effectively support infinite chaining for the
 * protection information scatterlist
 */
#define SCSI_MAX_PROT_SG_SEGMENTS	0xFFFF

/*
 * Special value for scanning to specify scanning or rescanning of all
 * possible channels, (target) ids, or luns on a given shost.
 */
#define SCAN_WILD_CARD	~0

#ifdef CONFIG_ACPI
struct acpi_bus_type;

extern int
scsi_register_acpi_bus_type(struct acpi_bus_type *bus);

extern void
scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus);
#endif

/** scsi_status_is_good - check the status return.
 *
 * @status: the status passed up from the driver (including host and
 *          driver components)
 *
 * This returns true for known good conditions that may be treated as
 * command completed normally
 */
static inline int scsi_status_is_good(int status)
{
	/*
	 * FIXME: bit0 is listed as reserved in SCSI-2, but is
	 * significant in SCSI-3.  For now, we follow the SCSI-2
	 * behaviour and ignore reserved bits.
	 */
	status &= 0xfe;
	return ((status == SAM_STAT_GOOD) ||
		(status == SAM_STAT_INTERMEDIATE) ||
		(status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
		/* FIXME: this is obsolete in SAM-3 */
		(status == SAM_STAT_COMMAND_TERMINATED));
}


/*
 * standard mode-select header prepended to all mode-select commands
 */

struct ccs_modesel_head {
	__u8 _r1;			/* reserved */
	__u8 medium;		/* device-specific medium type */
	__u8 _r2;			/* reserved */
	__u8 block_desc_length;	/* block descriptor length */
	__u8 density;		/* device-specific density code */
	__u8 number_blocks_hi;	/* number of blocks in this block desc */
	__u8 number_blocks_med;
	__u8 number_blocks_lo;
	__u8 _r3;
	__u8 block_length_hi;	/* block length for blocks in this desc */
	__u8 block_length_med;
	__u8 block_length_lo;
};

/*
 * The Well Known LUNS (SAM-3) in our int representation of a LUN
 */
#define SCSI_W_LUN_BASE 0xc100
#define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
#define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
#define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)

static inline int scsi_is_wlun(u64 lun)
{
	return (lun & 0xff00) == SCSI_W_LUN_BASE;
}


/*
 *  MESSAGE CODES
 */

#define COMMAND_COMPLETE    0x00
#define EXTENDED_MESSAGE    0x01
#define     EXTENDED_MODIFY_DATA_POINTER    0x00
#define     EXTENDED_SDTR                   0x01
#define     EXTENDED_EXTENDED_IDENTIFY      0x02    /* SCSI-I only */
#define     EXTENDED_WDTR                   0x03
#define     EXTENDED_PPR                    0x04
#define     EXTENDED_MODIFY_BIDI_DATA_PTR   0x05
#define SAVE_POINTERS       0x02
#define RESTORE_POINTERS    0x03
#define DISCONNECT          0x04
#define INITIATOR_ERROR     0x05
#define ABORT_TASK_SET      0x06
#define MESSAGE_REJECT      0x07
#define NOP                 0x08
#define MSG_PARITY_ERROR    0x09
#define LINKED_CMD_COMPLETE 0x0a
#define LINKED_FLG_CMD_COMPLETE 0x0b
#define TARGET_RESET        0x0c
#define ABORT_TASK          0x0d
#define CLEAR_TASK_SET      0x0e
#define INITIATE_RECOVERY   0x0f            /* SCSI-II only */
#define RELEASE_RECOVERY    0x10            /* SCSI-II only */
#define CLEAR_ACA           0x16
#define LOGICAL_UNIT_RESET  0x17
#define SIMPLE_QUEUE_TAG    0x20
#define HEAD_OF_QUEUE_TAG   0x21
#define ORDERED_QUEUE_TAG   0x22
#define IGNORE_WIDE_RESIDUE 0x23
#define ACA                 0x24
#define QAS_REQUEST         0x55

/* Old SCSI2 names, don't use in new code */
#define BUS_DEVICE_RESET    TARGET_RESET
#define ABORT               ABORT_TASK_SET

/*
 * Host byte codes
 */

#define DID_OK          0x00	/* NO error                                */
#define DID_NO_CONNECT  0x01	/* Couldn't connect before timeout period  */
#define DID_BUS_BUSY    0x02	/* BUS stayed busy through time out period */
#define DID_TIME_OUT    0x03	/* TIMED OUT for other reason              */
#define DID_BAD_TARGET  0x04	/* BAD target.                             */
#define DID_ABORT       0x05	/* Told to abort for some other reason     */
#define DID_PARITY      0x06	/* Parity error                            */
#define DID_ERROR       0x07	/* Internal error                          */
#define DID_RESET       0x08	/* Reset by somebody.                      */
#define DID_BAD_INTR    0x09	/* Got an interrupt we weren't expecting.  */
#define DID_PASSTHROUGH 0x0a	/* Force command past mid-layer            */
#define DID_SOFT_ERROR  0x0b	/* The low level driver just wish a retry  */
#define DID_IMM_RETRY   0x0c	/* Retry without decrementing retry count  */
#define DID_REQUEUE	0x0d	/* Requeue command (no immediate retry) also
				 * without decrementing the retry count	   */
#define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
				      * and the driver blocked the port to
				      * recover the link. Transport class will
				      * retry or fail IO */
#define DID_TRANSPORT_FAILFAST	0x0f /* Transport class fastfailed the io */
#define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on
				 * other paths */
#define DID_NEXUS_FAILURE 0x11  /* Permanent nexus failure, retry on other
				 * paths might yield different results */
#define DID_ALLOC_FAILURE 0x12  /* Space allocation on the device failed */
#define DID_MEDIUM_ERROR  0x13  /* Medium error */
#define DRIVER_OK       0x00	/* Driver status                           */

/*
 *  These indicate the error that occurred, and what is available.
 */

#define DRIVER_BUSY         0x01
#define DRIVER_SOFT         0x02
#define DRIVER_MEDIA        0x03
#define DRIVER_ERROR        0x04

#define DRIVER_INVALID      0x05
#define DRIVER_TIMEOUT      0x06
#define DRIVER_HARD         0x07
#define DRIVER_SENSE	    0x08

/*
 * Internal return values.
 */

#define NEEDS_RETRY     0x2001
#define SUCCESS         0x2002
#define FAILED          0x2003
#define QUEUED          0x2004
#define SOFT_ERROR      0x2005
#define ADD_TO_MLQUEUE  0x2006
#define TIMEOUT_ERROR   0x2007
#define SCSI_RETURN_NOT_HANDLED   0x2008
#define FAST_IO_FAIL	0x2009

/*
 * Midlevel queue return values.
 */
#define SCSI_MLQUEUE_HOST_BUSY   0x1055
#define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
#define SCSI_MLQUEUE_EH_RETRY    0x1057
#define SCSI_MLQUEUE_TARGET_BUSY 0x1058

/*
 *  Use these to separate status msg and our bytes
 *
 *  These are set by:
 *
 *      status byte = set from target device
 *      msg_byte    = return status from host adapter itself.
 *      host_byte   = set by low-level driver to indicate status.
 *      driver_byte = set by mid-level.
 */
#define status_byte(result) (((result) >> 1) & 0x7f)
#define msg_byte(result)    (((result) >> 8) & 0xff)
#define host_byte(result)   (((result) >> 16) & 0xff)
#define driver_byte(result) (((result) >> 24) & 0xff)

#define sense_class(sense)  (((sense) >> 4) & 0x7)
#define sense_error(sense)  ((sense) & 0xf)
#define sense_valid(sense)  ((sense) & 0x80)

/*
 * default timeouts
*/
#define FORMAT_UNIT_TIMEOUT		(2 * 60 * 60 * HZ)
#define START_STOP_TIMEOUT		(60 * HZ)
#define MOVE_MEDIUM_TIMEOUT		(5 * 60 * HZ)
#define READ_ELEMENT_STATUS_TIMEOUT	(5 * 60 * HZ)
#define READ_DEFECT_DATA_TIMEOUT	(60 * HZ )


#define IDENTIFY_BASE       0x80
#define IDENTIFY(can_disconnect, lun)   (IDENTIFY_BASE |\
		     ((can_disconnect) ?  0x40 : 0) |\
		     ((lun) & 0x07))

/*
 *  struct scsi_device::scsi_level values. For SCSI devices other than those
 *  prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
 *  where "resp" is a byte array of the response to an INQUIRY. The scsi_level
 *  variable is visible to the user via sysfs.
 */

#define SCSI_UNKNOWN    0
#define SCSI_1          1
#define SCSI_1_CCS      2
#define SCSI_2          3
#define SCSI_3          4        /* SPC */
#define SCSI_SPC_2      5
#define SCSI_SPC_3      6

/*
 * INQ PERIPHERAL QUALIFIERS
 */
#define SCSI_INQ_PQ_CON         0x00
#define SCSI_INQ_PQ_NOT_CON     0x01
#define SCSI_INQ_PQ_NOT_CAP     0x03


/*
 * Here are some scsi specific ioctl commands which are sometimes useful.
 *
 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
 */

/* Used to obtain PUN and LUN info.  Conflicts with CDROMAUDIOBUFSIZ */
#define SCSI_IOCTL_GET_IDLUN		0x5382

/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */

/* Used to obtain the host number of a device. */
#define SCSI_IOCTL_PROBE_HOST		0x5385

/* Used to obtain the bus number for a device */
#define SCSI_IOCTL_GET_BUS_NUMBER	0x5386

/* Used to obtain the PCI location of a device */
#define SCSI_IOCTL_GET_PCI		0x5387

/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
static inline __u32 scsi_to_u32(__u8 *ptr)
{
	return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
}

#endif /* _SCSI_SCSI_H */
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* This header file contains public constants and structures used by
c5f1ac8b	3	* the SCSI initiator code.
1da177e4 LT	4	*/
	5	#ifndef _SCSI_SCSI_H
	6	#define _SCSI_SCSI_H
	7
	8	#include <linux/types.h>
ac61c46f	9	#include <linux/scatterlist.h>
0816c925	10	#include <linux/kernel.h>
07e38420	11	#include <scsi/scsi_common.h>
c5f1ac8b	12	#include <scsi/scsi_proto.h>
f290f197 JB	13
f290f197 JB	14	struct scsi_cmnd;
1da177e4	15
0816c925 MP	16	enum scsi_timeouts {
	17	SCSI_DEFAULT_EH_TIMEOUT = 10 * HZ,
	18	};
	19
13f05c8d MP	20	/*
	21	* DIX-capable adapters effectively support infinite chaining for the
	22	* protection information scatterlist
	23	*/
	24	#define SCSI_MAX_PROT_SG_SEGMENTS 0xFFFF
	25
e02f3f59 CH	26	/*
	27	* Special value for scanning to specify scanning or rescanning of all
	28	* possible channels, (target) ids, or luns on a given shost.
	29	*/
	30	#define SCAN_WILD_CARD ~0
	31
de50ada5 HM	32	#ifdef CONFIG_ACPI
	33	struct acpi_bus_type;
	34
	35	extern int
	36	scsi_register_acpi_bus_type(struct acpi_bus_type *bus);
	37
	38	extern void
	39	scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus);
	40	#endif
	41
1da177e4 LT	42	/** scsi_status_is_good - check the status return.
	43	*
	44	* @status: the status passed up from the driver (including host and
	45	* driver components)
	46	*
	47	* This returns true for known good conditions that may be treated as
	48	* command completed normally
	49	*/
	50	static inline int scsi_status_is_good(int status)
	51	{
	52	/*
	53	* FIXME: bit0 is listed as reserved in SCSI-2, but is
	54	* significant in SCSI-3. For now, we follow the SCSI-2
	55	* behaviour and ignore reserved bits.
	56	*/
	57	status &= 0xfe;
	58	return ((status == SAM_STAT_GOOD) \|\|
	59	(status == SAM_STAT_INTERMEDIATE) \|\|
	60	(status == SAM_STAT_INTERMEDIATE_CONDITION_MET) \|\|
	61	/* FIXME: this is obsolete in SAM-3 */
	62	(status == SAM_STAT_COMMAND_TERMINATED));
	63	}
	64
4ff36718	65
1da177e4 LT	66	/*
	67	* standard mode-select header prepended to all mode-select commands
	68	*/
	69
	70	struct ccs_modesel_head {
	71	__u8 _r1; /* reserved */
	72	__u8 medium; /* device-specific medium type */
	73	__u8 _r2; /* reserved */
	74	__u8 block_desc_length; /* block descriptor length */
	75	__u8 density; /* device-specific density code */
	76	__u8 number_blocks_hi; /* number of blocks in this block desc */
	77	__u8 number_blocks_med;
	78	__u8 number_blocks_lo;
	79	__u8 _r3;
	80	__u8 block_length_hi; /* block length for blocks in this desc */
	81	__u8 block_length_med;
	82	__u8 block_length_lo;
	83	};
	84
01b291bd JB	85	/*
	86	* The Well Known LUNS (SAM-3) in our int representation of a LUN
	87	*/
	88	#define SCSI_W_LUN_BASE 0xc100
	89	#define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
	90	#define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
	91	#define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
	92
9cb78c16	93	static inline int scsi_is_wlun(u64 lun)
01b291bd JB	94	{
	95	return (lun & 0xff00) == SCSI_W_LUN_BASE;
	96	}
	97
	98
1da177e4 LT	99	/*
	100	* MESSAGE CODES
	101	*/
	102
	103	#define COMMAND_COMPLETE 0x00
	104	#define EXTENDED_MESSAGE 0x01
	105	#define EXTENDED_MODIFY_DATA_POINTER 0x00
	106	#define EXTENDED_SDTR 0x01
	107	#define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
	108	#define EXTENDED_WDTR 0x03
	109	#define EXTENDED_PPR 0x04
	110	#define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
	111	#define SAVE_POINTERS 0x02
	112	#define RESTORE_POINTERS 0x03
	113	#define DISCONNECT 0x04
	114	#define INITIATOR_ERROR 0x05
	115	#define ABORT_TASK_SET 0x06
	116	#define MESSAGE_REJECT 0x07
	117	#define NOP 0x08
	118	#define MSG_PARITY_ERROR 0x09
	119	#define LINKED_CMD_COMPLETE 0x0a
	120	#define LINKED_FLG_CMD_COMPLETE 0x0b
	121	#define TARGET_RESET 0x0c
	122	#define ABORT_TASK 0x0d
	123	#define CLEAR_TASK_SET 0x0e
	124	#define INITIATE_RECOVERY 0x0f /* SCSI-II only */
	125	#define RELEASE_RECOVERY 0x10 /* SCSI-II only */
	126	#define CLEAR_ACA 0x16
	127	#define LOGICAL_UNIT_RESET 0x17
	128	#define SIMPLE_QUEUE_TAG 0x20
	129	#define HEAD_OF_QUEUE_TAG 0x21
	130	#define ORDERED_QUEUE_TAG 0x22
	131	#define IGNORE_WIDE_RESIDUE 0x23
	132	#define ACA 0x24
	133	#define QAS_REQUEST 0x55
	134
	135	/* Old SCSI2 names, don't use in new code */
	136	#define BUS_DEVICE_RESET TARGET_RESET
	137	#define ABORT ABORT_TASK_SET
	138
	139	/*
	140	* Host byte codes
	141	*/
	142
	143	#define DID_OK 0x00 /* NO error */
	144	#define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
	145	#define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
	146	#define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
	147	#define DID_BAD_TARGET 0x04 /* BAD target. */
	148	#define DID_ABORT 0x05 /* Told to abort for some other reason */
	149	#define DID_PARITY 0x06 /* Parity error */
	150	#define DID_ERROR 0x07 /* Internal error */
	151	#define DID_RESET 0x08 /* Reset by somebody. */
	152	#define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
	153	#define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
	154	#define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
	155	#define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
bf341919 JB	156	#define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
bf341919 JB	157	* without decrementing the retry count */
a4dfaa6f MC	158	#define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
	159	* and the driver blocked the port to
	160	* recover the link. Transport class will
	161	* retry or fail IO */
	162	#define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */
63583cca HR	163	#define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on
	164	* other paths */
	165	#define DID_NEXUS_FAILURE 0x11 /* Permanent nexus failure, retry on other
	166	* paths might yield different results */
a9d6ceb8	167	#define DID_ALLOC_FAILURE 0x12 /* Space allocation on the device failed */
7e782af5	168	#define DID_MEDIUM_ERROR 0x13 /* Medium error */
1da177e4 LT	169	#define DRIVER_OK 0x00 /* Driver status */
	170
	171	/*
	172	* These indicate the error that occurred, and what is available.
	173	*/
	174
	175	#define DRIVER_BUSY 0x01
	176	#define DRIVER_SOFT 0x02
	177	#define DRIVER_MEDIA 0x03
	178	#define DRIVER_ERROR 0x04
	179
	180	#define DRIVER_INVALID 0x05
	181	#define DRIVER_TIMEOUT 0x06
	182	#define DRIVER_HARD 0x07
	183	#define DRIVER_SENSE 0x08
	184
1da177e4 LT	185	/*
	186	* Internal return values.
	187	*/
	188
	189	#define NEEDS_RETRY 0x2001
	190	#define SUCCESS 0x2002
	191	#define FAILED 0x2003
	192	#define QUEUED 0x2004
	193	#define SOFT_ERROR 0x2005
	194	#define ADD_TO_MLQUEUE 0x2006
	195	#define TIMEOUT_ERROR 0x2007
a6a8d9f8	196	#define SCSI_RETURN_NOT_HANDLED 0x2008
2f2eb587	197	#define FAST_IO_FAIL 0x2009
1da177e4 LT	198
	199	/*
	200	* Midlevel queue return values.
	201	*/
	202	#define SCSI_MLQUEUE_HOST_BUSY 0x1055
	203	#define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
	204	#define SCSI_MLQUEUE_EH_RETRY 0x1057
f0c0a376	205	#define SCSI_MLQUEUE_TARGET_BUSY 0x1058
1da177e4 LT	206
	207	/*
	208	* Use these to separate status msg and our bytes
	209	*
	210	* These are set by:
	211	*
	212	* status byte = set from target device
	213	* msg_byte = return status from host adapter itself.
	214	* host_byte = set by low-level driver to indicate status.
	215	* driver_byte = set by mid-level.
	216	*/
	217	#define status_byte(result) (((result) >> 1) & 0x7f)
	218	#define msg_byte(result) (((result) >> 8) & 0xff)
	219	#define host_byte(result) (((result) >> 16) & 0xff)
	220	#define driver_byte(result) (((result) >> 24) & 0xff)
1da177e4 LT	221
	222	#define sense_class(sense) (((sense) >> 4) & 0x7)
	223	#define sense_error(sense) ((sense) & 0xf)
497888cf	224	#define sense_valid(sense) ((sense) & 0x80)
1da177e4	225
b6651129 CH	226	/*
	227	* default timeouts
	228	*/
	229	#define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
	230	#define START_STOP_TIMEOUT (60 * HZ)
	231	#define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
	232	#define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
	233	#define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
	234
1da177e4 LT	235
	236	#define IDENTIFY_BASE 0x80
	237	#define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE \|\
	238	((can_disconnect) ? 0x40 : 0) \|\
	239	((lun) & 0x07))
	240
	241	/*
	242	* struct scsi_device::scsi_level values. For SCSI devices other than those
	243	* prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
	244	* where "resp" is a byte array of the response to an INQUIRY. The scsi_level
	245	* variable is visible to the user via sysfs.
	246	*/
	247
	248	#define SCSI_UNKNOWN 0
	249	#define SCSI_1 1
	250	#define SCSI_1_CCS 2
	251	#define SCSI_2 3
	252	#define SCSI_3 4 /* SPC */
	253	#define SCSI_SPC_2 5
	254	#define SCSI_SPC_3 6
	255
	256	/*
	257	* INQ PERIPHERAL QUALIFIERS
	258	*/
	259	#define SCSI_INQ_PQ_CON 0x00
	260	#define SCSI_INQ_PQ_NOT_CON 0x01
	261	#define SCSI_INQ_PQ_NOT_CAP 0x03
	262
	263
	264	/*
	265	* Here are some scsi specific ioctl commands which are sometimes useful.
	266	*
	267	* Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
	268	*/
	269
	270	/* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
	271	#define SCSI_IOCTL_GET_IDLUN 0x5382
	272
	273	/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
	274
	275	/* Used to obtain the host number of a device. */
	276	#define SCSI_IOCTL_PROBE_HOST 0x5385
	277
	278	/* Used to obtain the bus number for a device */
	279	#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
	280
	281	/* Used to obtain the PCI location of a device */
	282	#define SCSI_IOCTL_GET_PCI 0x5387
	283
2908d778	284	/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
4a531e8c	285	static inline __u32 scsi_to_u32(__u8 *ptr)
2908d778 JB	286	{
	287	return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
	288	}
	289
1da177e4	290	#endif /* _SCSI_SCSI_H */