2 * This header file contains public constants and structures used by
3 * the scsi code for linux.
5 * For documentation on the OPCODES, MESSAGES, and SENSE values,
6 * please consult the SCSI standard.
11 #include <linux/types.h>
14 * The maximum sg list length SCSI can cope with
15 * (currently must be a power of 2 between 32 and 256)
17 #define SCSI_MAX_PHYS_SEGMENTS MAX_PHYS_SEGMENTS
21 * SCSI command lengths
24 extern const unsigned char scsi_command_size[8];
25 #define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7]
28 * Special value for scanning to specify scanning or rescanning of all
29 * possible channels, (target) ids, or luns on a given shost.
31 #define SCAN_WILD_CARD ~0
37 #define TEST_UNIT_READY 0x00
38 #define REZERO_UNIT 0x01
39 #define REQUEST_SENSE 0x03
40 #define FORMAT_UNIT 0x04
41 #define READ_BLOCK_LIMITS 0x05
42 #define REASSIGN_BLOCKS 0x07
43 #define INITIALIZE_ELEMENT_STATUS 0x07
47 #define READ_REVERSE 0x0f
48 #define WRITE_FILEMARKS 0x10
51 #define RECOVER_BUFFERED_DATA 0x14
52 #define MODE_SELECT 0x15
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
63 #define SET_WINDOW 0x24
64 #define READ_CAPACITY 0x25
68 #define POSITION_TO_ELEMENT 0x2b
69 #define WRITE_VERIFY 0x2e
71 #define SEARCH_HIGH 0x30
72 #define SEARCH_EQUAL 0x31
73 #define SEARCH_LOW 0x32
74 #define SET_LIMITS 0x33
75 #define PRE_FETCH 0x34
76 #define READ_POSITION 0x34
77 #define SYNCHRONIZE_CACHE 0x35
78 #define LOCK_UNLOCK_CACHE 0x36
79 #define READ_DEFECT_DATA 0x37
80 #define MEDIUM_SCAN 0x38
82 #define COPY_VERIFY 0x3a
83 #define WRITE_BUFFER 0x3b
84 #define READ_BUFFER 0x3c
85 #define UPDATE_BLOCK 0x3d
86 #define READ_LONG 0x3e
87 #define WRITE_LONG 0x3f
88 #define CHANGE_DEFINITION 0x40
89 #define WRITE_SAME 0x41
91 #define LOG_SELECT 0x4c
92 #define LOG_SENSE 0x4d
93 #define MODE_SELECT_10 0x55
94 #define RESERVE_10 0x56
95 #define RELEASE_10 0x57
96 #define MODE_SENSE_10 0x5a
97 #define PERSISTENT_RESERVE_IN 0x5e
98 #define PERSISTENT_RESERVE_OUT 0x5f
99 #define REPORT_LUNS 0xa0
100 #define MAINTENANCE_IN 0xa3
101 #define MOVE_MEDIUM 0xa5
102 #define EXCHANGE_MEDIUM 0xa6
104 #define WRITE_12 0xaa
105 #define WRITE_VERIFY_12 0xae
106 #define SEARCH_HIGH_12 0xb0
107 #define SEARCH_EQUAL_12 0xb1
108 #define SEARCH_LOW_12 0xb2
109 #define READ_ELEMENT_STATUS 0xb8
110 #define SEND_VOLUME_TAG 0xb6
111 #define WRITE_LONG_2 0xea
113 #define WRITE_16 0x8a
114 #define VERIFY_16 0x8f
115 #define SERVICE_ACTION_IN 0x9e
116 /* values for service action in */
117 #define SAI_READ_CAPACITY_16 0x10
118 /* values for maintenance in */
119 #define MI_REPORT_TARGET_PGS 0x0a
121 /* Values for T10/04-262r7 */
122 #define ATA_16 0x85 /* 16-byte pass-thru */
123 #define ATA_12 0xa1 /* 12-byte pass-thru */
126 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
127 * T10/1561-D Revision 4 Draft dated 7th November 2002.
129 #define SAM_STAT_GOOD 0x00
130 #define SAM_STAT_CHECK_CONDITION 0x02
131 #define SAM_STAT_CONDITION_MET 0x04
132 #define SAM_STAT_BUSY 0x08
133 #define SAM_STAT_INTERMEDIATE 0x10
134 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
135 #define SAM_STAT_RESERVATION_CONFLICT 0x18
136 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
137 #define SAM_STAT_TASK_SET_FULL 0x28
138 #define SAM_STAT_ACA_ACTIVE 0x30
139 #define SAM_STAT_TASK_ABORTED 0x40
141 /** scsi_status_is_good - check the status return.
143 * @status: the status passed up from the driver (including host and
146 * This returns true for known good conditions that may be treated as
147 * command completed normally
149 static inline int scsi_status_is_good(int status)
152 * FIXME: bit0 is listed as reserved in SCSI-2, but is
153 * significant in SCSI-3. For now, we follow the SCSI-2
154 * behaviour and ignore reserved bits.
157 return ((status == SAM_STAT_GOOD) ||
158 (status == SAM_STAT_INTERMEDIATE) ||
159 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
160 /* FIXME: this is obsolete in SAM-3 */
161 (status == SAM_STAT_COMMAND_TERMINATED));
165 * Status codes. These are deprecated as they are shifted 1 bit right
166 * from those found in the SCSI standards. This causes confusion for
167 * applications that are ported to several OSes. Prefer SAM Status codes
172 #define CHECK_CONDITION 0x01
173 #define CONDITION_GOOD 0x02
175 #define INTERMEDIATE_GOOD 0x08
176 #define INTERMEDIATE_C_GOOD 0x0a
177 #define RESERVATION_CONFLICT 0x0c
178 #define COMMAND_TERMINATED 0x11
179 #define QUEUE_FULL 0x14
180 #define ACA_ACTIVE 0x18
181 #define TASK_ABORTED 0x20
183 #define STATUS_MASK 0xfe
189 #define NO_SENSE 0x00
190 #define RECOVERED_ERROR 0x01
191 #define NOT_READY 0x02
192 #define MEDIUM_ERROR 0x03
193 #define HARDWARE_ERROR 0x04
194 #define ILLEGAL_REQUEST 0x05
195 #define UNIT_ATTENTION 0x06
196 #define DATA_PROTECT 0x07
197 #define BLANK_CHECK 0x08
198 #define COPY_ABORTED 0x0a
199 #define ABORTED_COMMAND 0x0b
200 #define VOLUME_OVERFLOW 0x0d
201 #define MISCOMPARE 0x0e
208 #define TYPE_DISK 0x00
209 #define TYPE_TAPE 0x01
210 #define TYPE_PRINTER 0x02
211 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */
212 #define TYPE_WORM 0x04 /* Treated as ROM by our system */
213 #define TYPE_ROM 0x05
214 #define TYPE_SCANNER 0x06
215 #define TYPE_MOD 0x07 /* Magneto-optical disk -
216 * - treated as TYPE_DISK */
217 #define TYPE_MEDIUM_CHANGER 0x08
218 #define TYPE_COMM 0x09 /* Communications device */
219 #define TYPE_RAID 0x0c
220 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
221 #define TYPE_RBC 0x0e
222 #define TYPE_NO_LUN 0x7f
224 /* Returns a human-readable name for the device */
225 extern const char * scsi_device_type(unsigned type);
228 * standard mode-select header prepended to all mode-select commands
231 struct ccs_modesel_head {
232 __u8 _r1; /* reserved */
233 __u8 medium; /* device-specific medium type */
234 __u8 _r2; /* reserved */
235 __u8 block_desc_length; /* block descriptor length */
236 __u8 density; /* device-specific density code */
237 __u8 number_blocks_hi; /* number of blocks in this block desc */
238 __u8 number_blocks_med;
239 __u8 number_blocks_lo;
241 __u8 block_length_hi; /* block length for blocks in this desc */
242 __u8 block_length_med;
243 __u8 block_length_lo;
247 * ScsiLun: 8 byte LUN.
257 #define COMMAND_COMPLETE 0x00
258 #define EXTENDED_MESSAGE 0x01
259 #define EXTENDED_MODIFY_DATA_POINTER 0x00
260 #define EXTENDED_SDTR 0x01
261 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
262 #define EXTENDED_WDTR 0x03
263 #define EXTENDED_PPR 0x04
264 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
265 #define SAVE_POINTERS 0x02
266 #define RESTORE_POINTERS 0x03
267 #define DISCONNECT 0x04
268 #define INITIATOR_ERROR 0x05
269 #define ABORT_TASK_SET 0x06
270 #define MESSAGE_REJECT 0x07
272 #define MSG_PARITY_ERROR 0x09
273 #define LINKED_CMD_COMPLETE 0x0a
274 #define LINKED_FLG_CMD_COMPLETE 0x0b
275 #define TARGET_RESET 0x0c
276 #define ABORT_TASK 0x0d
277 #define CLEAR_TASK_SET 0x0e
278 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */
279 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */
280 #define CLEAR_ACA 0x16
281 #define LOGICAL_UNIT_RESET 0x17
282 #define SIMPLE_QUEUE_TAG 0x20
283 #define HEAD_OF_QUEUE_TAG 0x21
284 #define ORDERED_QUEUE_TAG 0x22
285 #define IGNORE_WIDE_RESIDUE 0x23
287 #define QAS_REQUEST 0x55
289 /* Old SCSI2 names, don't use in new code */
290 #define BUS_DEVICE_RESET TARGET_RESET
291 #define ABORT ABORT_TASK_SET
297 #define DID_OK 0x00 /* NO error */
298 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
299 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
300 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
301 #define DID_BAD_TARGET 0x04 /* BAD target. */
302 #define DID_ABORT 0x05 /* Told to abort for some other reason */
303 #define DID_PARITY 0x06 /* Parity error */
304 #define DID_ERROR 0x07 /* Internal error */
305 #define DID_RESET 0x08 /* Reset by somebody. */
306 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
307 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
308 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
309 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
310 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
311 * without decrementing the retry count */
312 #define DRIVER_OK 0x00 /* Driver status */
315 * These indicate the error that occurred, and what is available.
318 #define DRIVER_BUSY 0x01
319 #define DRIVER_SOFT 0x02
320 #define DRIVER_MEDIA 0x03
321 #define DRIVER_ERROR 0x04
323 #define DRIVER_INVALID 0x05
324 #define DRIVER_TIMEOUT 0x06
325 #define DRIVER_HARD 0x07
326 #define DRIVER_SENSE 0x08
328 #define SUGGEST_RETRY 0x10
329 #define SUGGEST_ABORT 0x20
330 #define SUGGEST_REMAP 0x30
331 #define SUGGEST_DIE 0x40
332 #define SUGGEST_SENSE 0x80
333 #define SUGGEST_IS_OK 0xff
335 #define DRIVER_MASK 0x0f
336 #define SUGGEST_MASK 0xf0
339 * Internal return values.
342 #define NEEDS_RETRY 0x2001
343 #define SUCCESS 0x2002
344 #define FAILED 0x2003
345 #define QUEUED 0x2004
346 #define SOFT_ERROR 0x2005
347 #define ADD_TO_MLQUEUE 0x2006
348 #define TIMEOUT_ERROR 0x2007
351 * Midlevel queue return values.
353 #define SCSI_MLQUEUE_HOST_BUSY 0x1055
354 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
355 #define SCSI_MLQUEUE_EH_RETRY 0x1057
358 * Use these to separate status msg and our bytes
362 * status byte = set from target device
363 * msg_byte = return status from host adapter itself.
364 * host_byte = set by low-level driver to indicate status.
365 * driver_byte = set by mid-level.
367 #define status_byte(result) (((result) >> 1) & 0x7f)
368 #define msg_byte(result) (((result) >> 8) & 0xff)
369 #define host_byte(result) (((result) >> 16) & 0xff)
370 #define driver_byte(result) (((result) >> 24) & 0xff)
371 #define suggestion(result) (driver_byte(result) & SUGGEST_MASK)
373 #define sense_class(sense) (((sense) >> 4) & 0x7)
374 #define sense_error(sense) ((sense) & 0xf)
375 #define sense_valid(sense) ((sense) & 0x80);
380 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
381 #define START_STOP_TIMEOUT (60 * HZ)
382 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
383 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
384 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
387 #define IDENTIFY_BASE 0x80
388 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
389 ((can_disconnect) ? 0x40 : 0) |\
393 * struct scsi_device::scsi_level values. For SCSI devices other than those
394 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
395 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level
396 * variable is visible to the user via sysfs.
399 #define SCSI_UNKNOWN 0
403 #define SCSI_3 4 /* SPC */
408 * INQ PERIPHERAL QUALIFIERS
410 #define SCSI_INQ_PQ_CON 0x00
411 #define SCSI_INQ_PQ_NOT_CON 0x01
412 #define SCSI_INQ_PQ_NOT_CAP 0x03
416 * Here are some scsi specific ioctl commands which are sometimes useful.
418 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
421 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
422 #define SCSI_IOCTL_GET_IDLUN 0x5382
424 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
426 /* Used to obtain the host number of a device. */
427 #define SCSI_IOCTL_PROBE_HOST 0x5385
429 /* Used to obtain the bus number for a device */
430 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
432 /* Used to obtain the PCI location of a device */
433 #define SCSI_IOCTL_GET_PCI 0x5387
435 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
436 static inline __u32 scsi_to_u32(__u8 *ptr)
438 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
441 #endif /* _SCSI_SCSI_H */