[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / scsi / scsi.h

/*
 * This header file contains public constants and structures used by
 * the scsi code for linux.
 *
 * For documentation on the OPCODES, MESSAGES, and SENSE values,
 * please consult the SCSI standard.
 */
#ifndef _SCSI_SCSI_H
#define _SCSI_SCSI_H

#include <linux/types.h>

/*
 * The maximum number of SG segments that we will put inside a
 * scatterlist (unless chaining is used). Should ideally fit inside a
 * single page, to avoid a higher order allocation.  We could define this
 * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order.  The
 * minimum value is 32
 */
#define SCSI_MAX_SG_SEGMENTS	128

/*
 * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
 * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
 */
#ifdef ARCH_HAS_SG_CHAIN
#define SCSI_MAX_SG_CHAIN_SEGMENTS	2048
#else
#define SCSI_MAX_SG_CHAIN_SEGMENTS	SCSI_MAX_SG_SEGMENTS
#endif

/*
 *	SCSI command lengths
 */

extern const unsigned char scsi_command_size[8];
#define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7]

/*
 * 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

/*
 *      SCSI opcodes
 */

#define TEST_UNIT_READY       0x00
#define REZERO_UNIT           0x01
#define REQUEST_SENSE         0x03
#define FORMAT_UNIT           0x04
#define READ_BLOCK_LIMITS     0x05
#define REASSIGN_BLOCKS       0x07
#define INITIALIZE_ELEMENT_STATUS 0x07
#define READ_6                0x08
#define WRITE_6               0x0a
#define SEEK_6                0x0b
#define READ_REVERSE          0x0f
#define WRITE_FILEMARKS       0x10
#define SPACE                 0x11
#define INQUIRY               0x12
#define RECOVER_BUFFERED_DATA 0x14
#define MODE_SELECT           0x15
#define RESERVE               0x16
#define RELEASE               0x17
#define COPY                  0x18
#define ERASE                 0x19
#define MODE_SENSE            0x1a
#define START_STOP            0x1b
#define RECEIVE_DIAGNOSTIC    0x1c
#define SEND_DIAGNOSTIC       0x1d
#define ALLOW_MEDIUM_REMOVAL  0x1e

#define SET_WINDOW            0x24
#define READ_CAPACITY         0x25
#define READ_10               0x28
#define WRITE_10              0x2a
#define SEEK_10               0x2b
#define POSITION_TO_ELEMENT   0x2b
#define WRITE_VERIFY          0x2e
#define VERIFY                0x2f
#define SEARCH_HIGH           0x30
#define SEARCH_EQUAL          0x31
#define SEARCH_LOW            0x32
#define SET_LIMITS            0x33
#define PRE_FETCH             0x34
#define READ_POSITION         0x34
#define SYNCHRONIZE_CACHE     0x35
#define LOCK_UNLOCK_CACHE     0x36
#define READ_DEFECT_DATA      0x37
#define MEDIUM_SCAN           0x38
#define COMPARE               0x39
#define COPY_VERIFY           0x3a
#define WRITE_BUFFER          0x3b
#define READ_BUFFER           0x3c
#define UPDATE_BLOCK          0x3d
#define READ_LONG             0x3e
#define WRITE_LONG            0x3f
#define CHANGE_DEFINITION     0x40
#define WRITE_SAME            0x41
#define READ_TOC              0x43
#define LOG_SELECT            0x4c
#define LOG_SENSE             0x4d
#define MODE_SELECT_10        0x55
#define RESERVE_10            0x56
#define RELEASE_10            0x57
#define MODE_SENSE_10         0x5a
#define PERSISTENT_RESERVE_IN 0x5e
#define PERSISTENT_RESERVE_OUT 0x5f
#define REPORT_LUNS           0xa0
#define MAINTENANCE_IN        0xa3
#define MOVE_MEDIUM           0xa5
#define EXCHANGE_MEDIUM       0xa6
#define READ_12               0xa8
#define WRITE_12              0xaa
#define WRITE_VERIFY_12       0xae
#define SEARCH_HIGH_12        0xb0
#define SEARCH_EQUAL_12       0xb1
#define SEARCH_LOW_12         0xb2
#define READ_ELEMENT_STATUS   0xb8
#define SEND_VOLUME_TAG       0xb6
#define WRITE_LONG_2          0xea
#define READ_16               0x88
#define WRITE_16              0x8a
#define VERIFY_16	      0x8f
#define SERVICE_ACTION_IN     0x9e
/* values for service action in */
#define	SAI_READ_CAPACITY_16  0x10
/* values for maintenance in */
#define MI_REPORT_TARGET_PGS  0x0a

/* Values for T10/04-262r7 */
#define	ATA_16		      0x85	/* 16-byte pass-thru */
#define	ATA_12		      0xa1	/* 12-byte pass-thru */

/*
 *  SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
 *  T10/1561-D Revision 4 Draft dated 7th November 2002.
 */
#define SAM_STAT_GOOD            0x00
#define SAM_STAT_CHECK_CONDITION 0x02
#define SAM_STAT_CONDITION_MET   0x04
#define SAM_STAT_BUSY            0x08
#define SAM_STAT_INTERMEDIATE    0x10
#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
#define SAM_STAT_RESERVATION_CONFLICT 0x18
#define SAM_STAT_COMMAND_TERMINATED 0x22	/* obsolete in SAM-3 */
#define SAM_STAT_TASK_SET_FULL   0x28
#define SAM_STAT_ACA_ACTIVE      0x30
#define SAM_STAT_TASK_ABORTED    0x40

/** 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));
}

/*
 *  Status codes. These are deprecated as they are shifted 1 bit right
 *  from those found in the SCSI standards. This causes confusion for
 *  applications that are ported to several OSes. Prefer SAM Status codes
 *  above.
 */

#define GOOD                 0x00
#define CHECK_CONDITION      0x01
#define CONDITION_GOOD       0x02
#define BUSY                 0x04
#define INTERMEDIATE_GOOD    0x08
#define INTERMEDIATE_C_GOOD  0x0a
#define RESERVATION_CONFLICT 0x0c
#define COMMAND_TERMINATED   0x11
#define QUEUE_FULL           0x14
#define ACA_ACTIVE           0x18
#define TASK_ABORTED         0x20

#define STATUS_MASK          0xfe

/*
 *  SENSE KEYS
 */

#define NO_SENSE            0x00
#define RECOVERED_ERROR     0x01
#define NOT_READY           0x02
#define MEDIUM_ERROR        0x03
#define HARDWARE_ERROR      0x04
#define ILLEGAL_REQUEST     0x05
#define UNIT_ATTENTION      0x06
#define DATA_PROTECT        0x07
#define BLANK_CHECK         0x08
#define COPY_ABORTED        0x0a
#define ABORTED_COMMAND     0x0b
#define VOLUME_OVERFLOW     0x0d
#define MISCOMPARE          0x0e


/*
 *  DEVICE TYPES
 *  Please keep them in 0x%02x format for $MODALIAS to work
 */

#define TYPE_DISK           0x00
#define TYPE_TAPE           0x01
#define TYPE_PRINTER        0x02
#define TYPE_PROCESSOR      0x03    /* HP scanners use this */
#define TYPE_WORM           0x04    /* Treated as ROM by our system */
#define TYPE_ROM            0x05
#define TYPE_SCANNER        0x06
#define TYPE_MOD            0x07    /* Magneto-optical disk - 
				     * - treated as TYPE_DISK */
#define TYPE_MEDIUM_CHANGER 0x08
#define TYPE_COMM           0x09    /* Communications device */
#define TYPE_RAID           0x0c
#define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
#define TYPE_RBC	    0x0e
#define TYPE_NO_LUN         0x7f

/* Returns a human-readable name for the device */
extern const char * scsi_device_type(unsigned type);

/*
 * 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;
};

/*
 * ScsiLun: 8 byte LUN.
 */
struct scsi_lun {
	__u8 scsi_lun[8];
};

/*
 *  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 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

#define SUGGEST_RETRY       0x10
#define SUGGEST_ABORT       0x20
#define SUGGEST_REMAP       0x30
#define SUGGEST_DIE         0x40
#define SUGGEST_SENSE       0x80
#define SUGGEST_IS_OK       0xff

#define DRIVER_MASK         0x0f
#define SUGGEST_MASK        0xf0

/*
 * 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

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

/*
 *  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 suggestion(result)  (driver_byte(result) & SUGGEST_MASK)

#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	/*
	2	* This header file contains public constants and structures used by
	3	* the scsi code for linux.
	4	*
	5	* For documentation on the OPCODES, MESSAGES, and SENSE values,
	6	* please consult the SCSI standard.
	7	*/
	8	#ifndef _SCSI_SCSI_H
	9	#define _SCSI_SCSI_H
	10
	11	#include <linux/types.h>
	12
d3f46f39 JB	13	/*
	14	* The maximum number of SG segments that we will put inside a
	15	* scatterlist (unless chaining is used). Should ideally fit inside a
	16	* single page, to avoid a higher order allocation. We could define this
	17	* to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The
	18	* minimum value is 32
	19	*/
	20	#define SCSI_MAX_SG_SEGMENTS 128
	21
	22	/*
	23	* Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
	24	* is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
	25	*/
	26	#ifdef ARCH_HAS_SG_CHAIN
	27	#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048
	28	#else
	29	#define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS
	30	#endif
	31
1da177e4 LT	32	/*
	33	* SCSI command lengths
	34	*/
	35
	36	extern const unsigned char scsi_command_size[8];
	37	#define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7]
	38
e02f3f59 CH	39	/*
	40	* Special value for scanning to specify scanning or rescanning of all
	41	* possible channels, (target) ids, or luns on a given shost.
	42	*/
	43	#define SCAN_WILD_CARD ~0
	44
1da177e4 LT	45	/*
	46	* SCSI opcodes
	47	*/
	48
	49	#define TEST_UNIT_READY 0x00
	50	#define REZERO_UNIT 0x01
	51	#define REQUEST_SENSE 0x03
	52	#define FORMAT_UNIT 0x04
	53	#define READ_BLOCK_LIMITS 0x05
	54	#define REASSIGN_BLOCKS 0x07
daa6eda6	55	#define INITIALIZE_ELEMENT_STATUS 0x07
1da177e4 LT	56	#define READ_6 0x08
	57	#define WRITE_6 0x0a
	58	#define SEEK_6 0x0b
	59	#define READ_REVERSE 0x0f
	60	#define WRITE_FILEMARKS 0x10
	61	#define SPACE 0x11
	62	#define INQUIRY 0x12
	63	#define RECOVER_BUFFERED_DATA 0x14
	64	#define MODE_SELECT 0x15
	65	#define RESERVE 0x16
	66	#define RELEASE 0x17
	67	#define COPY 0x18
	68	#define ERASE 0x19
	69	#define MODE_SENSE 0x1a
	70	#define START_STOP 0x1b
	71	#define RECEIVE_DIAGNOSTIC 0x1c
	72	#define SEND_DIAGNOSTIC 0x1d
	73	#define ALLOW_MEDIUM_REMOVAL 0x1e
	74
	75	#define SET_WINDOW 0x24
	76	#define READ_CAPACITY 0x25
	77	#define READ_10 0x28
	78	#define WRITE_10 0x2a
	79	#define SEEK_10 0x2b
daa6eda6	80	#define POSITION_TO_ELEMENT 0x2b
1da177e4 LT	81	#define WRITE_VERIFY 0x2e
	82	#define VERIFY 0x2f
	83	#define SEARCH_HIGH 0x30
	84	#define SEARCH_EQUAL 0x31
	85	#define SEARCH_LOW 0x32
	86	#define SET_LIMITS 0x33
	87	#define PRE_FETCH 0x34
	88	#define READ_POSITION 0x34
	89	#define SYNCHRONIZE_CACHE 0x35
	90	#define LOCK_UNLOCK_CACHE 0x36
	91	#define READ_DEFECT_DATA 0x37
	92	#define MEDIUM_SCAN 0x38
	93	#define COMPARE 0x39
	94	#define COPY_VERIFY 0x3a
	95	#define WRITE_BUFFER 0x3b
	96	#define READ_BUFFER 0x3c
	97	#define UPDATE_BLOCK 0x3d
	98	#define READ_LONG 0x3e
	99	#define WRITE_LONG 0x3f
	100	#define CHANGE_DEFINITION 0x40
	101	#define WRITE_SAME 0x41
	102	#define READ_TOC 0x43
	103	#define LOG_SELECT 0x4c
	104	#define LOG_SENSE 0x4d
	105	#define MODE_SELECT_10 0x55
	106	#define RESERVE_10 0x56
	107	#define RELEASE_10 0x57
	108	#define MODE_SENSE_10 0x5a
	109	#define PERSISTENT_RESERVE_IN 0x5e
	110	#define PERSISTENT_RESERVE_OUT 0x5f
	111	#define REPORT_LUNS 0xa0
5a09e398	112	#define MAINTENANCE_IN 0xa3
1da177e4	113	#define MOVE_MEDIUM 0xa5
daa6eda6	114	#define EXCHANGE_MEDIUM 0xa6
1da177e4 LT	115	#define READ_12 0xa8
	116	#define WRITE_12 0xaa
	117	#define WRITE_VERIFY_12 0xae
	118	#define SEARCH_HIGH_12 0xb0
	119	#define SEARCH_EQUAL_12 0xb1
	120	#define SEARCH_LOW_12 0xb2
	121	#define READ_ELEMENT_STATUS 0xb8
	122	#define SEND_VOLUME_TAG 0xb6
	123	#define WRITE_LONG_2 0xea
	124	#define READ_16 0x88
	125	#define WRITE_16 0x8a
	126	#define VERIFY_16 0x8f
	127	#define SERVICE_ACTION_IN 0x9e
	128	/* values for service action in */
	129	#define SAI_READ_CAPACITY_16 0x10
5a09e398 HR	130	/* values for maintenance in */
5a09e398 HR	131	#define MI_REPORT_TARGET_PGS 0x0a
1da177e4	132
b095518e JG	133	/* Values for T10/04-262r7 */
	134	#define ATA_16 0x85 /* 16-byte pass-thru */
	135	#define ATA_12 0xa1 /* 12-byte pass-thru */
1da177e4 LT	136
	137	/*
	138	* SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
	139	* T10/1561-D Revision 4 Draft dated 7th November 2002.
	140	*/
	141	#define SAM_STAT_GOOD 0x00
	142	#define SAM_STAT_CHECK_CONDITION 0x02
	143	#define SAM_STAT_CONDITION_MET 0x04
	144	#define SAM_STAT_BUSY 0x08
	145	#define SAM_STAT_INTERMEDIATE 0x10
	146	#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
	147	#define SAM_STAT_RESERVATION_CONFLICT 0x18
	148	#define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
	149	#define SAM_STAT_TASK_SET_FULL 0x28
	150	#define SAM_STAT_ACA_ACTIVE 0x30
	151	#define SAM_STAT_TASK_ABORTED 0x40
	152
	153	/** scsi_status_is_good - check the status return.
	154	*
	155	* @status: the status passed up from the driver (including host and
	156	* driver components)
	157	*
	158	* This returns true for known good conditions that may be treated as
	159	* command completed normally
	160	*/
	161	static inline int scsi_status_is_good(int status)
	162	{
	163	/*
	164	* FIXME: bit0 is listed as reserved in SCSI-2, but is
	165	* significant in SCSI-3. For now, we follow the SCSI-2
	166	* behaviour and ignore reserved bits.
	167	*/
	168	status &= 0xfe;
	169	return ((status == SAM_STAT_GOOD) \|\|
	170	(status == SAM_STAT_INTERMEDIATE) \|\|
	171	(status == SAM_STAT_INTERMEDIATE_CONDITION_MET) \|\|
	172	/* FIXME: this is obsolete in SAM-3 */
	173	(status == SAM_STAT_COMMAND_TERMINATED));
	174	}
	175
	176	/*
	177	* Status codes. These are deprecated as they are shifted 1 bit right
	178	* from those found in the SCSI standards. This causes confusion for
	179	* applications that are ported to several OSes. Prefer SAM Status codes
	180	* above.
	181	*/
	182
	183	#define GOOD 0x00
	184	#define CHECK_CONDITION 0x01
	185	#define CONDITION_GOOD 0x02
	186	#define BUSY 0x04
	187	#define INTERMEDIATE_GOOD 0x08
	188	#define INTERMEDIATE_C_GOOD 0x0a
	189	#define RESERVATION_CONFLICT 0x0c
	190	#define COMMAND_TERMINATED 0x11
	191	#define QUEUE_FULL 0x14
	192	#define ACA_ACTIVE 0x18
	193	#define TASK_ABORTED 0x20
	194
	195	#define STATUS_MASK 0xfe
	196
	197	/*
	198	* SENSE KEYS
	199	*/
200
201	#define NO_SENSE 0x00
202	#define RECOVERED_ERROR 0x01
203	#define NOT_READY 0x02
204	#define MEDIUM_ERROR 0x03
205	#define HARDWARE_ERROR 0x04
206	#define ILLEGAL_REQUEST 0x05
207	#define UNIT_ATTENTION 0x06
208	#define DATA_PROTECT 0x07
209	#define BLANK_CHECK 0x08
210	#define COPY_ABORTED 0x0a
211	#define ABORTED_COMMAND 0x0b
212	#define VOLUME_OVERFLOW 0x0d
213	#define MISCOMPARE 0x0e
214
215
216	/*
217	* DEVICE TYPES
d7b8bcb0	218	* Please keep them in 0x%02x format for $MODALIAS to work
1da177e4 LT	219	*/
	220
	221	#define TYPE_DISK 0x00
	222	#define TYPE_TAPE 0x01
	223	#define TYPE_PRINTER 0x02
	224	#define TYPE_PROCESSOR 0x03 /* HP scanners use this */
	225	#define TYPE_WORM 0x04 /* Treated as ROM by our system */
	226	#define TYPE_ROM 0x05
	227	#define TYPE_SCANNER 0x06
	228	#define TYPE_MOD 0x07 /* Magneto-optical disk -
	229	* - treated as TYPE_DISK */
	230	#define TYPE_MEDIUM_CHANGER 0x08
	231	#define TYPE_COMM 0x09 /* Communications device */
1da177e4	232	#define TYPE_RAID 0x0c
7f602c53	233	#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
631e8a13	234	#define TYPE_RBC 0x0e
1da177e4 LT	235	#define TYPE_NO_LUN 0x7f
1da177e4 LT	236
4ff36718 MW	237	/* Returns a human-readable name for the device */
	238	extern const char * scsi_device_type(unsigned type);
	239
1da177e4 LT	240	/*
	241	* standard mode-select header prepended to all mode-select commands
	242	*/
	243
	244	struct ccs_modesel_head {
	245	__u8 _r1; /* reserved */
	246	__u8 medium; /* device-specific medium type */
	247	__u8 _r2; /* reserved */
	248	__u8 block_desc_length; /* block descriptor length */
	249	__u8 density; /* device-specific density code */
	250	__u8 number_blocks_hi; /* number of blocks in this block desc */
	251	__u8 number_blocks_med;
	252	__u8 number_blocks_lo;
	253	__u8 _r3;
	254	__u8 block_length_hi; /* block length for blocks in this desc */
	255	__u8 block_length_med;
	256	__u8 block_length_lo;
	257	};
	258
	259	/*
	260	* ScsiLun: 8 byte LUN.
	261	*/
	262	struct scsi_lun {
	263	__u8 scsi_lun[8];
	264	};
	265
	266	/*
	267	* MESSAGE CODES
	268	*/
	269
	270	#define COMMAND_COMPLETE 0x00
	271	#define EXTENDED_MESSAGE 0x01
	272	#define EXTENDED_MODIFY_DATA_POINTER 0x00
	273	#define EXTENDED_SDTR 0x01
	274	#define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
	275	#define EXTENDED_WDTR 0x03
	276	#define EXTENDED_PPR 0x04
	277	#define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
	278	#define SAVE_POINTERS 0x02
	279	#define RESTORE_POINTERS 0x03
	280	#define DISCONNECT 0x04
	281	#define INITIATOR_ERROR 0x05
	282	#define ABORT_TASK_SET 0x06
	283	#define MESSAGE_REJECT 0x07
	284	#define NOP 0x08
	285	#define MSG_PARITY_ERROR 0x09
	286	#define LINKED_CMD_COMPLETE 0x0a
	287	#define LINKED_FLG_CMD_COMPLETE 0x0b
	288	#define TARGET_RESET 0x0c
	289	#define ABORT_TASK 0x0d
	290	#define CLEAR_TASK_SET 0x0e
	291	#define INITIATE_RECOVERY 0x0f /* SCSI-II only */
	292	#define RELEASE_RECOVERY 0x10 /* SCSI-II only */
	293	#define CLEAR_ACA 0x16
	294	#define LOGICAL_UNIT_RESET 0x17
	295	#define SIMPLE_QUEUE_TAG 0x20
	296	#define HEAD_OF_QUEUE_TAG 0x21
	297	#define ORDERED_QUEUE_TAG 0x22
	298	#define IGNORE_WIDE_RESIDUE 0x23
	299	#define ACA 0x24
	300	#define QAS_REQUEST 0x55
	301
	302	/* Old SCSI2 names, don't use in new code */
	303	#define BUS_DEVICE_RESET TARGET_RESET
304	#define ABORT ABORT_TASK_SET
305
306	/*
307	* Host byte codes
308	*/
309
310	#define DID_OK 0x00 /* NO error */
311	#define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
312	#define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
313	#define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
314	#define DID_BAD_TARGET 0x04 /* BAD target. */
315	#define DID_ABORT 0x05 /* Told to abort for some other reason */
316	#define DID_PARITY 0x06 /* Parity error */
317	#define DID_ERROR 0x07 /* Internal error */
318	#define DID_RESET 0x08 /* Reset by somebody. */
319	#define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
320	#define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
321	#define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
322	#define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
bf341919 JB	323	#define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
bf341919 JB	324	* without decrementing the retry count */
1da177e4 LT	325	#define DRIVER_OK 0x00 /* Driver status */
	326
	327	/*
	328	* These indicate the error that occurred, and what is available.
	329	*/
	330
	331	#define DRIVER_BUSY 0x01
	332	#define DRIVER_SOFT 0x02
	333	#define DRIVER_MEDIA 0x03
	334	#define DRIVER_ERROR 0x04
	335
	336	#define DRIVER_INVALID 0x05
	337	#define DRIVER_TIMEOUT 0x06
	338	#define DRIVER_HARD 0x07
	339	#define DRIVER_SENSE 0x08
	340
	341	#define SUGGEST_RETRY 0x10
	342	#define SUGGEST_ABORT 0x20
	343	#define SUGGEST_REMAP 0x30
	344	#define SUGGEST_DIE 0x40
	345	#define SUGGEST_SENSE 0x80
	346	#define SUGGEST_IS_OK 0xff
	347
	348	#define DRIVER_MASK 0x0f
	349	#define SUGGEST_MASK 0xf0
	350
	351	/*
	352	* Internal return values.
	353	*/
	354
	355	#define NEEDS_RETRY 0x2001
	356	#define SUCCESS 0x2002
	357	#define FAILED 0x2003
	358	#define QUEUED 0x2004
	359	#define SOFT_ERROR 0x2005
	360	#define ADD_TO_MLQUEUE 0x2006
	361	#define TIMEOUT_ERROR 0x2007
	362
	363	/*
	364	* Midlevel queue return values.
	365	*/
	366	#define SCSI_MLQUEUE_HOST_BUSY 0x1055
	367	#define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
	368	#define SCSI_MLQUEUE_EH_RETRY 0x1057
	369
	370	/*
	371	* Use these to separate status msg and our bytes
	372	*
	373	* These are set by:
	374	*
	375	* status byte = set from target device
	376	* msg_byte = return status from host adapter itself.
	377	* host_byte = set by low-level driver to indicate status.
	378	* driver_byte = set by mid-level.
	379	*/
	380	#define status_byte(result) (((result) >> 1) & 0x7f)
	381	#define msg_byte(result) (((result) >> 8) & 0xff)
	382	#define host_byte(result) (((result) >> 16) & 0xff)
	383	#define driver_byte(result) (((result) >> 24) & 0xff)
	384	#define suggestion(result) (driver_byte(result) & SUGGEST_MASK)
	385
	386	#define sense_class(sense) (((sense) >> 4) & 0x7)
	387	#define sense_error(sense) ((sense) & 0xf)
	388	#define sense_valid(sense) ((sense) & 0x80);
389
b6651129 CH	390	/*
	391	* default timeouts
	392	*/
	393	#define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
	394	#define START_STOP_TIMEOUT (60 * HZ)
	395	#define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
	396	#define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
	397	#define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
	398
1da177e4 LT	399
	400	#define IDENTIFY_BASE 0x80
	401	#define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE \|\
	402	((can_disconnect) ? 0x40 : 0) \|\
	403	((lun) & 0x07))
	404
	405	/*
	406	* struct scsi_device::scsi_level values. For SCSI devices other than those
	407	* prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
	408	* where "resp" is a byte array of the response to an INQUIRY. The scsi_level
	409	* variable is visible to the user via sysfs.
	410	*/
	411
	412	#define SCSI_UNKNOWN 0
	413	#define SCSI_1 1
	414	#define SCSI_1_CCS 2
	415	#define SCSI_2 3
	416	#define SCSI_3 4 /* SPC */
	417	#define SCSI_SPC_2 5
	418	#define SCSI_SPC_3 6
	419
	420	/*
	421	* INQ PERIPHERAL QUALIFIERS
	422	*/
	423	#define SCSI_INQ_PQ_CON 0x00
	424	#define SCSI_INQ_PQ_NOT_CON 0x01
	425	#define SCSI_INQ_PQ_NOT_CAP 0x03
	426
	427
	428	/*
	429	* Here are some scsi specific ioctl commands which are sometimes useful.
	430	*
	431	* Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
	432	*/
	433
	434	/* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
	435	#define SCSI_IOCTL_GET_IDLUN 0x5382
	436
	437	/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
	438
	439	/* Used to obtain the host number of a device. */
	440	#define SCSI_IOCTL_PROBE_HOST 0x5385
	441
	442	/* Used to obtain the bus number for a device */
	443	#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
	444
	445	/* Used to obtain the PCI location of a device */
	446	#define SCSI_IOCTL_GET_PCI 0x5387
	447
2908d778	448	/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
4a531e8c	449	static inline __u32 scsi_to_u32(__u8 *ptr)
2908d778 JB	450	{
	451	return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
	452	}
	453
1da177e4	454	#endif /* _SCSI_SCSI_H */