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 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
20 #define SCSI_MAX_SG_SEGMENTS 128
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.
26 #ifdef ARCH_HAS_SG_CHAIN
27 #define SCSI_MAX_SG_CHAIN_SEGMENTS 2048
29 #define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS
33 * SCSI command lengths
36 extern const unsigned char scsi_command_size[8];
37 #define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7]
40 * Special value for scanning to specify scanning or rescanning of all
41 * possible channels, (target) ids, or luns on a given shost.
43 #define SCAN_WILD_CARD ~0
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
55 #define INITIALIZE_ELEMENT_STATUS 0x07
59 #define READ_REVERSE 0x0f
60 #define WRITE_FILEMARKS 0x10
63 #define RECOVER_BUFFERED_DATA 0x14
64 #define MODE_SELECT 0x15
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
75 #define SET_WINDOW 0x24
76 #define READ_CAPACITY 0x25
80 #define POSITION_TO_ELEMENT 0x2b
81 #define WRITE_VERIFY 0x2e
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
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 XDWRITEREAD_10 0x53
106 #define MODE_SELECT_10 0x55
107 #define RESERVE_10 0x56
108 #define RELEASE_10 0x57
109 #define MODE_SENSE_10 0x5a
110 #define PERSISTENT_RESERVE_IN 0x5e
111 #define PERSISTENT_RESERVE_OUT 0x5f
112 #define REPORT_LUNS 0xa0
113 #define MAINTENANCE_IN 0xa3
114 #define MOVE_MEDIUM 0xa5
115 #define EXCHANGE_MEDIUM 0xa6
117 #define WRITE_12 0xaa
118 #define WRITE_VERIFY_12 0xae
119 #define SEARCH_HIGH_12 0xb0
120 #define SEARCH_EQUAL_12 0xb1
121 #define SEARCH_LOW_12 0xb2
122 #define READ_ELEMENT_STATUS 0xb8
123 #define SEND_VOLUME_TAG 0xb6
124 #define WRITE_LONG_2 0xea
126 #define WRITE_16 0x8a
127 #define VERIFY_16 0x8f
128 #define SERVICE_ACTION_IN 0x9e
129 /* values for service action in */
130 #define SAI_READ_CAPACITY_16 0x10
131 /* values for maintenance in */
132 #define MI_REPORT_TARGET_PGS 0x0a
134 /* Values for T10/04-262r7 */
135 #define ATA_16 0x85 /* 16-byte pass-thru */
136 #define ATA_12 0xa1 /* 12-byte pass-thru */
139 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
140 * T10/1561-D Revision 4 Draft dated 7th November 2002.
142 #define SAM_STAT_GOOD 0x00
143 #define SAM_STAT_CHECK_CONDITION 0x02
144 #define SAM_STAT_CONDITION_MET 0x04
145 #define SAM_STAT_BUSY 0x08
146 #define SAM_STAT_INTERMEDIATE 0x10
147 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
148 #define SAM_STAT_RESERVATION_CONFLICT 0x18
149 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
150 #define SAM_STAT_TASK_SET_FULL 0x28
151 #define SAM_STAT_ACA_ACTIVE 0x30
152 #define SAM_STAT_TASK_ABORTED 0x40
154 /** scsi_status_is_good - check the status return.
156 * @status: the status passed up from the driver (including host and
159 * This returns true for known good conditions that may be treated as
160 * command completed normally
162 static inline int scsi_status_is_good(int status)
165 * FIXME: bit0 is listed as reserved in SCSI-2, but is
166 * significant in SCSI-3. For now, we follow the SCSI-2
167 * behaviour and ignore reserved bits.
170 return ((status == SAM_STAT_GOOD) ||
171 (status == SAM_STAT_INTERMEDIATE) ||
172 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
173 /* FIXME: this is obsolete in SAM-3 */
174 (status == SAM_STAT_COMMAND_TERMINATED));
178 * Status codes. These are deprecated as they are shifted 1 bit right
179 * from those found in the SCSI standards. This causes confusion for
180 * applications that are ported to several OSes. Prefer SAM Status codes
185 #define CHECK_CONDITION 0x01
186 #define CONDITION_GOOD 0x02
188 #define INTERMEDIATE_GOOD 0x08
189 #define INTERMEDIATE_C_GOOD 0x0a
190 #define RESERVATION_CONFLICT 0x0c
191 #define COMMAND_TERMINATED 0x11
192 #define QUEUE_FULL 0x14
193 #define ACA_ACTIVE 0x18
194 #define TASK_ABORTED 0x20
196 #define STATUS_MASK 0xfe
202 #define NO_SENSE 0x00
203 #define RECOVERED_ERROR 0x01
204 #define NOT_READY 0x02
205 #define MEDIUM_ERROR 0x03
206 #define HARDWARE_ERROR 0x04
207 #define ILLEGAL_REQUEST 0x05
208 #define UNIT_ATTENTION 0x06
209 #define DATA_PROTECT 0x07
210 #define BLANK_CHECK 0x08
211 #define COPY_ABORTED 0x0a
212 #define ABORTED_COMMAND 0x0b
213 #define VOLUME_OVERFLOW 0x0d
214 #define MISCOMPARE 0x0e
219 * Please keep them in 0x%02x format for $MODALIAS to work
222 #define TYPE_DISK 0x00
223 #define TYPE_TAPE 0x01
224 #define TYPE_PRINTER 0x02
225 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */
226 #define TYPE_WORM 0x04 /* Treated as ROM by our system */
227 #define TYPE_ROM 0x05
228 #define TYPE_SCANNER 0x06
229 #define TYPE_MOD 0x07 /* Magneto-optical disk -
230 * - treated as TYPE_DISK */
231 #define TYPE_MEDIUM_CHANGER 0x08
232 #define TYPE_COMM 0x09 /* Communications device */
233 #define TYPE_RAID 0x0c
234 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
235 #define TYPE_RBC 0x0e
236 #define TYPE_NO_LUN 0x7f
238 /* SCSI protocols; these are taken from SPC-3 section 7.5 */
240 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */
241 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */
242 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */
243 SCSI_PROTOCOL_SBP = 3, /* firewire */
244 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */
245 SCSI_PROTOCOL_ISCSI = 5,
246 SCSI_PROTOCOL_SAS = 6,
247 SCSI_PROTOCOL_ADT = 7, /* Media Changers */
248 SCSI_PROTOCOL_ATA = 8,
249 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
252 /* Returns a human-readable name for the device */
253 extern const char * scsi_device_type(unsigned type);
256 * standard mode-select header prepended to all mode-select commands
259 struct ccs_modesel_head {
260 __u8 _r1; /* reserved */
261 __u8 medium; /* device-specific medium type */
262 __u8 _r2; /* reserved */
263 __u8 block_desc_length; /* block descriptor length */
264 __u8 density; /* device-specific density code */
265 __u8 number_blocks_hi; /* number of blocks in this block desc */
266 __u8 number_blocks_med;
267 __u8 number_blocks_lo;
269 __u8 block_length_hi; /* block length for blocks in this desc */
270 __u8 block_length_med;
271 __u8 block_length_lo;
275 * ScsiLun: 8 byte LUN.
285 #define COMMAND_COMPLETE 0x00
286 #define EXTENDED_MESSAGE 0x01
287 #define EXTENDED_MODIFY_DATA_POINTER 0x00
288 #define EXTENDED_SDTR 0x01
289 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
290 #define EXTENDED_WDTR 0x03
291 #define EXTENDED_PPR 0x04
292 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
293 #define SAVE_POINTERS 0x02
294 #define RESTORE_POINTERS 0x03
295 #define DISCONNECT 0x04
296 #define INITIATOR_ERROR 0x05
297 #define ABORT_TASK_SET 0x06
298 #define MESSAGE_REJECT 0x07
300 #define MSG_PARITY_ERROR 0x09
301 #define LINKED_CMD_COMPLETE 0x0a
302 #define LINKED_FLG_CMD_COMPLETE 0x0b
303 #define TARGET_RESET 0x0c
304 #define ABORT_TASK 0x0d
305 #define CLEAR_TASK_SET 0x0e
306 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */
307 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */
308 #define CLEAR_ACA 0x16
309 #define LOGICAL_UNIT_RESET 0x17
310 #define SIMPLE_QUEUE_TAG 0x20
311 #define HEAD_OF_QUEUE_TAG 0x21
312 #define ORDERED_QUEUE_TAG 0x22
313 #define IGNORE_WIDE_RESIDUE 0x23
315 #define QAS_REQUEST 0x55
317 /* Old SCSI2 names, don't use in new code */
318 #define BUS_DEVICE_RESET TARGET_RESET
319 #define ABORT ABORT_TASK_SET
325 #define DID_OK 0x00 /* NO error */
326 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
327 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
328 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
329 #define DID_BAD_TARGET 0x04 /* BAD target. */
330 #define DID_ABORT 0x05 /* Told to abort for some other reason */
331 #define DID_PARITY 0x06 /* Parity error */
332 #define DID_ERROR 0x07 /* Internal error */
333 #define DID_RESET 0x08 /* Reset by somebody. */
334 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
335 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
336 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
337 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
338 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
339 * without decrementing the retry count */
340 #define DRIVER_OK 0x00 /* Driver status */
343 * These indicate the error that occurred, and what is available.
346 #define DRIVER_BUSY 0x01
347 #define DRIVER_SOFT 0x02
348 #define DRIVER_MEDIA 0x03
349 #define DRIVER_ERROR 0x04
351 #define DRIVER_INVALID 0x05
352 #define DRIVER_TIMEOUT 0x06
353 #define DRIVER_HARD 0x07
354 #define DRIVER_SENSE 0x08
356 #define SUGGEST_RETRY 0x10
357 #define SUGGEST_ABORT 0x20
358 #define SUGGEST_REMAP 0x30
359 #define SUGGEST_DIE 0x40
360 #define SUGGEST_SENSE 0x80
361 #define SUGGEST_IS_OK 0xff
363 #define DRIVER_MASK 0x0f
364 #define SUGGEST_MASK 0xf0
367 * Internal return values.
370 #define NEEDS_RETRY 0x2001
371 #define SUCCESS 0x2002
372 #define FAILED 0x2003
373 #define QUEUED 0x2004
374 #define SOFT_ERROR 0x2005
375 #define ADD_TO_MLQUEUE 0x2006
376 #define TIMEOUT_ERROR 0x2007
379 * Midlevel queue return values.
381 #define SCSI_MLQUEUE_HOST_BUSY 0x1055
382 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
383 #define SCSI_MLQUEUE_EH_RETRY 0x1057
386 * Use these to separate status msg and our bytes
390 * status byte = set from target device
391 * msg_byte = return status from host adapter itself.
392 * host_byte = set by low-level driver to indicate status.
393 * driver_byte = set by mid-level.
395 #define status_byte(result) (((result) >> 1) & 0x7f)
396 #define msg_byte(result) (((result) >> 8) & 0xff)
397 #define host_byte(result) (((result) >> 16) & 0xff)
398 #define driver_byte(result) (((result) >> 24) & 0xff)
399 #define suggestion(result) (driver_byte(result) & SUGGEST_MASK)
401 #define sense_class(sense) (((sense) >> 4) & 0x7)
402 #define sense_error(sense) ((sense) & 0xf)
403 #define sense_valid(sense) ((sense) & 0x80);
408 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
409 #define START_STOP_TIMEOUT (60 * HZ)
410 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
411 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
412 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
415 #define IDENTIFY_BASE 0x80
416 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
417 ((can_disconnect) ? 0x40 : 0) |\
421 * struct scsi_device::scsi_level values. For SCSI devices other than those
422 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
423 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level
424 * variable is visible to the user via sysfs.
427 #define SCSI_UNKNOWN 0
431 #define SCSI_3 4 /* SPC */
436 * INQ PERIPHERAL QUALIFIERS
438 #define SCSI_INQ_PQ_CON 0x00
439 #define SCSI_INQ_PQ_NOT_CON 0x01
440 #define SCSI_INQ_PQ_NOT_CAP 0x03
444 * Here are some scsi specific ioctl commands which are sometimes useful.
446 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
449 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
450 #define SCSI_IOCTL_GET_IDLUN 0x5382
452 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
454 /* Used to obtain the host number of a device. */
455 #define SCSI_IOCTL_PROBE_HOST 0x5385
457 /* Used to obtain the bus number for a device */
458 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
460 /* Used to obtain the PCI location of a device */
461 #define SCSI_IOCTL_GET_PCI 0x5387
463 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
464 static inline __u32 scsi_to_u32(__u8 *ptr)
466 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
469 #endif /* _SCSI_SCSI_H */