[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 sg list length SCSI can cope with
 *	(currently must be a power of 2 between 32 and 256)
 */
#define SCSI_MAX_PHYS_SEGMENTS	MAX_PHYS_SEGMENTS


/*
 *	SCSI command lengths
 */

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

/*
 *	SCSI device types
 */

#define MAX_SCSI_DEVICE_CODE 14
extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];

/*
 *      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 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 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 MOVE_MEDIUM           0xa5
#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


/*
 *  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
 */

#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_ENCLOSURE      0x0d    /* Enclosure Services Device */
#define TYPE_RAID           0x0c
#define TYPE_NO_LUN         0x7f

/*
 * 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 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);


#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

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