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]
31 #define MAX_SCSI_DEVICE_CODE 15
32 extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
35 * Special value for scanning to specify scanning or rescanning of all
36 * possible channels, (target) ids, or luns on a given shost.
38 #define SCAN_WILD_CARD ~0
44 #define TEST_UNIT_READY 0x00
45 #define REZERO_UNIT 0x01
46 #define REQUEST_SENSE 0x03
47 #define FORMAT_UNIT 0x04
48 #define READ_BLOCK_LIMITS 0x05
49 #define REASSIGN_BLOCKS 0x07
50 #define INITIALIZE_ELEMENT_STATUS 0x07
54 #define READ_REVERSE 0x0f
55 #define WRITE_FILEMARKS 0x10
58 #define RECOVER_BUFFERED_DATA 0x14
59 #define MODE_SELECT 0x15
64 #define MODE_SENSE 0x1a
65 #define START_STOP 0x1b
66 #define RECEIVE_DIAGNOSTIC 0x1c
67 #define SEND_DIAGNOSTIC 0x1d
68 #define ALLOW_MEDIUM_REMOVAL 0x1e
70 #define SET_WINDOW 0x24
71 #define READ_CAPACITY 0x25
75 #define POSITION_TO_ELEMENT 0x2b
76 #define WRITE_VERIFY 0x2e
78 #define SEARCH_HIGH 0x30
79 #define SEARCH_EQUAL 0x31
80 #define SEARCH_LOW 0x32
81 #define SET_LIMITS 0x33
82 #define PRE_FETCH 0x34
83 #define READ_POSITION 0x34
84 #define SYNCHRONIZE_CACHE 0x35
85 #define LOCK_UNLOCK_CACHE 0x36
86 #define READ_DEFECT_DATA 0x37
87 #define MEDIUM_SCAN 0x38
89 #define COPY_VERIFY 0x3a
90 #define WRITE_BUFFER 0x3b
91 #define READ_BUFFER 0x3c
92 #define UPDATE_BLOCK 0x3d
93 #define READ_LONG 0x3e
94 #define WRITE_LONG 0x3f
95 #define CHANGE_DEFINITION 0x40
96 #define WRITE_SAME 0x41
98 #define LOG_SELECT 0x4c
99 #define LOG_SENSE 0x4d
100 #define MODE_SELECT_10 0x55
101 #define RESERVE_10 0x56
102 #define RELEASE_10 0x57
103 #define MODE_SENSE_10 0x5a
104 #define PERSISTENT_RESERVE_IN 0x5e
105 #define PERSISTENT_RESERVE_OUT 0x5f
106 #define REPORT_LUNS 0xa0
107 #define MOVE_MEDIUM 0xa5
108 #define EXCHANGE_MEDIUM 0xa6
110 #define WRITE_12 0xaa
111 #define WRITE_VERIFY_12 0xae
112 #define SEARCH_HIGH_12 0xb0
113 #define SEARCH_EQUAL_12 0xb1
114 #define SEARCH_LOW_12 0xb2
115 #define READ_ELEMENT_STATUS 0xb8
116 #define SEND_VOLUME_TAG 0xb6
117 #define WRITE_LONG_2 0xea
119 #define WRITE_16 0x8a
120 #define VERIFY_16 0x8f
121 #define SERVICE_ACTION_IN 0x9e
122 /* values for service action in */
123 #define SAI_READ_CAPACITY_16 0x10
125 /* Values for T10/04-262r7 */
126 #define ATA_16 0x85 /* 16-byte pass-thru */
127 #define ATA_12 0xa1 /* 12-byte pass-thru */
130 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
131 * T10/1561-D Revision 4 Draft dated 7th November 2002.
133 #define SAM_STAT_GOOD 0x00
134 #define SAM_STAT_CHECK_CONDITION 0x02
135 #define SAM_STAT_CONDITION_MET 0x04
136 #define SAM_STAT_BUSY 0x08
137 #define SAM_STAT_INTERMEDIATE 0x10
138 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
139 #define SAM_STAT_RESERVATION_CONFLICT 0x18
140 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
141 #define SAM_STAT_TASK_SET_FULL 0x28
142 #define SAM_STAT_ACA_ACTIVE 0x30
143 #define SAM_STAT_TASK_ABORTED 0x40
145 /** scsi_status_is_good - check the status return.
147 * @status: the status passed up from the driver (including host and
150 * This returns true for known good conditions that may be treated as
151 * command completed normally
153 static inline int scsi_status_is_good(int status)
156 * FIXME: bit0 is listed as reserved in SCSI-2, but is
157 * significant in SCSI-3. For now, we follow the SCSI-2
158 * behaviour and ignore reserved bits.
161 return ((status == SAM_STAT_GOOD) ||
162 (status == SAM_STAT_INTERMEDIATE) ||
163 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
164 /* FIXME: this is obsolete in SAM-3 */
165 (status == SAM_STAT_COMMAND_TERMINATED));
169 * Status codes. These are deprecated as they are shifted 1 bit right
170 * from those found in the SCSI standards. This causes confusion for
171 * applications that are ported to several OSes. Prefer SAM Status codes
176 #define CHECK_CONDITION 0x01
177 #define CONDITION_GOOD 0x02
179 #define INTERMEDIATE_GOOD 0x08
180 #define INTERMEDIATE_C_GOOD 0x0a
181 #define RESERVATION_CONFLICT 0x0c
182 #define COMMAND_TERMINATED 0x11
183 #define QUEUE_FULL 0x14
184 #define ACA_ACTIVE 0x18
185 #define TASK_ABORTED 0x20
187 #define STATUS_MASK 0xfe
193 #define NO_SENSE 0x00
194 #define RECOVERED_ERROR 0x01
195 #define NOT_READY 0x02
196 #define MEDIUM_ERROR 0x03
197 #define HARDWARE_ERROR 0x04
198 #define ILLEGAL_REQUEST 0x05
199 #define UNIT_ATTENTION 0x06
200 #define DATA_PROTECT 0x07
201 #define BLANK_CHECK 0x08
202 #define COPY_ABORTED 0x0a
203 #define ABORTED_COMMAND 0x0b
204 #define VOLUME_OVERFLOW 0x0d
205 #define MISCOMPARE 0x0e
212 #define TYPE_DISK 0x00
213 #define TYPE_TAPE 0x01
214 #define TYPE_PRINTER 0x02
215 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */
216 #define TYPE_WORM 0x04 /* Treated as ROM by our system */
217 #define TYPE_ROM 0x05
218 #define TYPE_SCANNER 0x06
219 #define TYPE_MOD 0x07 /* Magneto-optical disk -
220 * - treated as TYPE_DISK */
221 #define TYPE_MEDIUM_CHANGER 0x08
222 #define TYPE_COMM 0x09 /* Communications device */
223 #define TYPE_RAID 0x0c
224 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
225 #define TYPE_RBC 0x0e
226 #define TYPE_NO_LUN 0x7f
229 * standard mode-select header prepended to all mode-select commands
232 struct ccs_modesel_head {
233 __u8 _r1; /* reserved */
234 __u8 medium; /* device-specific medium type */
235 __u8 _r2; /* reserved */
236 __u8 block_desc_length; /* block descriptor length */
237 __u8 density; /* device-specific density code */
238 __u8 number_blocks_hi; /* number of blocks in this block desc */
239 __u8 number_blocks_med;
240 __u8 number_blocks_lo;
242 __u8 block_length_hi; /* block length for blocks in this desc */
243 __u8 block_length_med;
244 __u8 block_length_lo;
248 * ScsiLun: 8 byte LUN.
258 #define COMMAND_COMPLETE 0x00
259 #define EXTENDED_MESSAGE 0x01
260 #define EXTENDED_MODIFY_DATA_POINTER 0x00
261 #define EXTENDED_SDTR 0x01
262 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
263 #define EXTENDED_WDTR 0x03
264 #define EXTENDED_PPR 0x04
265 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
266 #define SAVE_POINTERS 0x02
267 #define RESTORE_POINTERS 0x03
268 #define DISCONNECT 0x04
269 #define INITIATOR_ERROR 0x05
270 #define ABORT_TASK_SET 0x06
271 #define MESSAGE_REJECT 0x07
273 #define MSG_PARITY_ERROR 0x09
274 #define LINKED_CMD_COMPLETE 0x0a
275 #define LINKED_FLG_CMD_COMPLETE 0x0b
276 #define TARGET_RESET 0x0c
277 #define ABORT_TASK 0x0d
278 #define CLEAR_TASK_SET 0x0e
279 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */
280 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */
281 #define CLEAR_ACA 0x16
282 #define LOGICAL_UNIT_RESET 0x17
283 #define SIMPLE_QUEUE_TAG 0x20
284 #define HEAD_OF_QUEUE_TAG 0x21
285 #define ORDERED_QUEUE_TAG 0x22
286 #define IGNORE_WIDE_RESIDUE 0x23
288 #define QAS_REQUEST 0x55
290 /* Old SCSI2 names, don't use in new code */
291 #define BUS_DEVICE_RESET TARGET_RESET
292 #define ABORT ABORT_TASK_SET
298 #define DID_OK 0x00 /* NO error */
299 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
300 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
301 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
302 #define DID_BAD_TARGET 0x04 /* BAD target. */
303 #define DID_ABORT 0x05 /* Told to abort for some other reason */
304 #define DID_PARITY 0x06 /* Parity error */
305 #define DID_ERROR 0x07 /* Internal error */
306 #define DID_RESET 0x08 /* Reset by somebody. */
307 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
308 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
309 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
310 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
311 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
312 * without decrementing the retry count */
313 #define DRIVER_OK 0x00 /* Driver status */
316 * These indicate the error that occurred, and what is available.
319 #define DRIVER_BUSY 0x01
320 #define DRIVER_SOFT 0x02
321 #define DRIVER_MEDIA 0x03
322 #define DRIVER_ERROR 0x04
324 #define DRIVER_INVALID 0x05
325 #define DRIVER_TIMEOUT 0x06
326 #define DRIVER_HARD 0x07
327 #define DRIVER_SENSE 0x08
329 #define SUGGEST_RETRY 0x10
330 #define SUGGEST_ABORT 0x20
331 #define SUGGEST_REMAP 0x30
332 #define SUGGEST_DIE 0x40
333 #define SUGGEST_SENSE 0x80
334 #define SUGGEST_IS_OK 0xff
336 #define DRIVER_MASK 0x0f
337 #define SUGGEST_MASK 0xf0
340 * Internal return values.
343 #define NEEDS_RETRY 0x2001
344 #define SUCCESS 0x2002
345 #define FAILED 0x2003
346 #define QUEUED 0x2004
347 #define SOFT_ERROR 0x2005
348 #define ADD_TO_MLQUEUE 0x2006
349 #define TIMEOUT_ERROR 0x2007
352 * Midlevel queue return values.
354 #define SCSI_MLQUEUE_HOST_BUSY 0x1055
355 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
356 #define SCSI_MLQUEUE_EH_RETRY 0x1057
359 * Use these to separate status msg and our bytes
363 * status byte = set from target device
364 * msg_byte = return status from host adapter itself.
365 * host_byte = set by low-level driver to indicate status.
366 * driver_byte = set by mid-level.
368 #define status_byte(result) (((result) >> 1) & 0x7f)
369 #define msg_byte(result) (((result) >> 8) & 0xff)
370 #define host_byte(result) (((result) >> 16) & 0xff)
371 #define driver_byte(result) (((result) >> 24) & 0xff)
372 #define suggestion(result) (driver_byte(result) & SUGGEST_MASK)
374 #define sense_class(sense) (((sense) >> 4) & 0x7)
375 #define sense_error(sense) ((sense) & 0xf)
376 #define sense_valid(sense) ((sense) & 0x80);
381 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
382 #define START_STOP_TIMEOUT (60 * HZ)
383 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
384 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
385 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
388 #define IDENTIFY_BASE 0x80
389 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
390 ((can_disconnect) ? 0x40 : 0) |\
394 * struct scsi_device::scsi_level values. For SCSI devices other than those
395 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
396 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level
397 * variable is visible to the user via sysfs.
400 #define SCSI_UNKNOWN 0
404 #define SCSI_3 4 /* SPC */
409 * INQ PERIPHERAL QUALIFIERS
411 #define SCSI_INQ_PQ_CON 0x00
412 #define SCSI_INQ_PQ_NOT_CON 0x01
413 #define SCSI_INQ_PQ_NOT_CAP 0x03
417 * Here are some scsi specific ioctl commands which are sometimes useful.
419 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
422 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
423 #define SCSI_IOCTL_GET_IDLUN 0x5382
425 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
427 /* Used to obtain the host number of a device. */
428 #define SCSI_IOCTL_PROBE_HOST 0x5385
430 /* Used to obtain the bus number for a device */
431 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
433 /* Used to obtain the PCI location of a device */
434 #define SCSI_IOCTL_GET_PCI 0x5387
436 #endif /* _SCSI_SCSI_H */