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 * Special value for scanning to specify scanning or rescanning of all
34 * possible channels, (target) ids, or luns on a given shost.
36 #define SCAN_WILD_CARD ~0
42 #define TEST_UNIT_READY 0x00
43 #define REZERO_UNIT 0x01
44 #define REQUEST_SENSE 0x03
45 #define FORMAT_UNIT 0x04
46 #define READ_BLOCK_LIMITS 0x05
47 #define REASSIGN_BLOCKS 0x07
48 #define INITIALIZE_ELEMENT_STATUS 0x07
52 #define READ_REVERSE 0x0f
53 #define WRITE_FILEMARKS 0x10
56 #define RECOVER_BUFFERED_DATA 0x14
57 #define MODE_SELECT 0x15
62 #define MODE_SENSE 0x1a
63 #define START_STOP 0x1b
64 #define RECEIVE_DIAGNOSTIC 0x1c
65 #define SEND_DIAGNOSTIC 0x1d
66 #define ALLOW_MEDIUM_REMOVAL 0x1e
68 #define SET_WINDOW 0x24
69 #define READ_CAPACITY 0x25
73 #define POSITION_TO_ELEMENT 0x2b
74 #define WRITE_VERIFY 0x2e
76 #define SEARCH_HIGH 0x30
77 #define SEARCH_EQUAL 0x31
78 #define SEARCH_LOW 0x32
79 #define SET_LIMITS 0x33
80 #define PRE_FETCH 0x34
81 #define READ_POSITION 0x34
82 #define SYNCHRONIZE_CACHE 0x35
83 #define LOCK_UNLOCK_CACHE 0x36
84 #define READ_DEFECT_DATA 0x37
85 #define MEDIUM_SCAN 0x38
87 #define COPY_VERIFY 0x3a
88 #define WRITE_BUFFER 0x3b
89 #define READ_BUFFER 0x3c
90 #define UPDATE_BLOCK 0x3d
91 #define READ_LONG 0x3e
92 #define WRITE_LONG 0x3f
93 #define CHANGE_DEFINITION 0x40
94 #define WRITE_SAME 0x41
96 #define LOG_SELECT 0x4c
97 #define LOG_SENSE 0x4d
98 #define XDWRITEREAD_10 0x53
99 #define MODE_SELECT_10 0x55
100 #define RESERVE_10 0x56
101 #define RELEASE_10 0x57
102 #define MODE_SENSE_10 0x5a
103 #define PERSISTENT_RESERVE_IN 0x5e
104 #define PERSISTENT_RESERVE_OUT 0x5f
105 #define VARIABLE_LENGTH_CMD 0x7f
106 #define REPORT_LUNS 0xa0
107 #define MAINTENANCE_IN 0xa3
108 #define MOVE_MEDIUM 0xa5
109 #define EXCHANGE_MEDIUM 0xa6
111 #define WRITE_12 0xaa
112 #define WRITE_VERIFY_12 0xae
113 #define SEARCH_HIGH_12 0xb0
114 #define SEARCH_EQUAL_12 0xb1
115 #define SEARCH_LOW_12 0xb2
116 #define READ_ELEMENT_STATUS 0xb8
117 #define SEND_VOLUME_TAG 0xb6
118 #define WRITE_LONG_2 0xea
120 #define WRITE_16 0x8a
121 #define VERIFY_16 0x8f
122 #define SERVICE_ACTION_IN 0x9e
123 /* values for service action in */
124 #define SAI_READ_CAPACITY_16 0x10
125 /* values for maintenance in */
126 #define MI_REPORT_TARGET_PGS 0x0a
128 /* Values for T10/04-262r7 */
129 #define ATA_16 0x85 /* 16-byte pass-thru */
130 #define ATA_12 0xa1 /* 12-byte pass-thru */
133 * SCSI command lengths
136 #define SCSI_MAX_VARLEN_CDB_SIZE 260
138 /* defined in T10 SCSI Primary Commands-2 (SPC2) */
139 struct scsi_varlen_cdb_hdr {
140 u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */
143 u8 additional_cdb_length; /* total cdb length - 8 */
144 __be16 service_action;
145 /* service specific data follows */
148 static inline unsigned
149 scsi_varlen_cdb_length(const void *hdr)
151 return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
154 extern const unsigned char scsi_command_size_tbl[8];
155 #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
157 static inline unsigned
158 scsi_command_size(const unsigned char *cmnd)
160 return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
161 scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
165 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
166 * T10/1561-D Revision 4 Draft dated 7th November 2002.
168 #define SAM_STAT_GOOD 0x00
169 #define SAM_STAT_CHECK_CONDITION 0x02
170 #define SAM_STAT_CONDITION_MET 0x04
171 #define SAM_STAT_BUSY 0x08
172 #define SAM_STAT_INTERMEDIATE 0x10
173 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
174 #define SAM_STAT_RESERVATION_CONFLICT 0x18
175 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
176 #define SAM_STAT_TASK_SET_FULL 0x28
177 #define SAM_STAT_ACA_ACTIVE 0x30
178 #define SAM_STAT_TASK_ABORTED 0x40
180 /** scsi_status_is_good - check the status return.
182 * @status: the status passed up from the driver (including host and
185 * This returns true for known good conditions that may be treated as
186 * command completed normally
188 static inline int scsi_status_is_good(int status)
191 * FIXME: bit0 is listed as reserved in SCSI-2, but is
192 * significant in SCSI-3. For now, we follow the SCSI-2
193 * behaviour and ignore reserved bits.
196 return ((status == SAM_STAT_GOOD) ||
197 (status == SAM_STAT_INTERMEDIATE) ||
198 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
199 /* FIXME: this is obsolete in SAM-3 */
200 (status == SAM_STAT_COMMAND_TERMINATED));
204 * Status codes. These are deprecated as they are shifted 1 bit right
205 * from those found in the SCSI standards. This causes confusion for
206 * applications that are ported to several OSes. Prefer SAM Status codes
211 #define CHECK_CONDITION 0x01
212 #define CONDITION_GOOD 0x02
214 #define INTERMEDIATE_GOOD 0x08
215 #define INTERMEDIATE_C_GOOD 0x0a
216 #define RESERVATION_CONFLICT 0x0c
217 #define COMMAND_TERMINATED 0x11
218 #define QUEUE_FULL 0x14
219 #define ACA_ACTIVE 0x18
220 #define TASK_ABORTED 0x20
222 #define STATUS_MASK 0xfe
228 #define NO_SENSE 0x00
229 #define RECOVERED_ERROR 0x01
230 #define NOT_READY 0x02
231 #define MEDIUM_ERROR 0x03
232 #define HARDWARE_ERROR 0x04
233 #define ILLEGAL_REQUEST 0x05
234 #define UNIT_ATTENTION 0x06
235 #define DATA_PROTECT 0x07
236 #define BLANK_CHECK 0x08
237 #define COPY_ABORTED 0x0a
238 #define ABORTED_COMMAND 0x0b
239 #define VOLUME_OVERFLOW 0x0d
240 #define MISCOMPARE 0x0e
245 * Please keep them in 0x%02x format for $MODALIAS to work
248 #define TYPE_DISK 0x00
249 #define TYPE_TAPE 0x01
250 #define TYPE_PRINTER 0x02
251 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */
252 #define TYPE_WORM 0x04 /* Treated as ROM by our system */
253 #define TYPE_ROM 0x05
254 #define TYPE_SCANNER 0x06
255 #define TYPE_MOD 0x07 /* Magneto-optical disk -
256 * - treated as TYPE_DISK */
257 #define TYPE_MEDIUM_CHANGER 0x08
258 #define TYPE_COMM 0x09 /* Communications device */
259 #define TYPE_RAID 0x0c
260 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
261 #define TYPE_RBC 0x0e
262 #define TYPE_NO_LUN 0x7f
264 /* SCSI protocols; these are taken from SPC-3 section 7.5 */
266 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */
267 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */
268 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */
269 SCSI_PROTOCOL_SBP = 3, /* firewire */
270 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */
271 SCSI_PROTOCOL_ISCSI = 5,
272 SCSI_PROTOCOL_SAS = 6,
273 SCSI_PROTOCOL_ADT = 7, /* Media Changers */
274 SCSI_PROTOCOL_ATA = 8,
275 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
278 /* Returns a human-readable name for the device */
279 extern const char * scsi_device_type(unsigned type);
282 * standard mode-select header prepended to all mode-select commands
285 struct ccs_modesel_head {
286 __u8 _r1; /* reserved */
287 __u8 medium; /* device-specific medium type */
288 __u8 _r2; /* reserved */
289 __u8 block_desc_length; /* block descriptor length */
290 __u8 density; /* device-specific density code */
291 __u8 number_blocks_hi; /* number of blocks in this block desc */
292 __u8 number_blocks_med;
293 __u8 number_blocks_lo;
295 __u8 block_length_hi; /* block length for blocks in this desc */
296 __u8 block_length_med;
297 __u8 block_length_lo;
301 * ScsiLun: 8 byte LUN.
311 #define COMMAND_COMPLETE 0x00
312 #define EXTENDED_MESSAGE 0x01
313 #define EXTENDED_MODIFY_DATA_POINTER 0x00
314 #define EXTENDED_SDTR 0x01
315 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
316 #define EXTENDED_WDTR 0x03
317 #define EXTENDED_PPR 0x04
318 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
319 #define SAVE_POINTERS 0x02
320 #define RESTORE_POINTERS 0x03
321 #define DISCONNECT 0x04
322 #define INITIATOR_ERROR 0x05
323 #define ABORT_TASK_SET 0x06
324 #define MESSAGE_REJECT 0x07
326 #define MSG_PARITY_ERROR 0x09
327 #define LINKED_CMD_COMPLETE 0x0a
328 #define LINKED_FLG_CMD_COMPLETE 0x0b
329 #define TARGET_RESET 0x0c
330 #define ABORT_TASK 0x0d
331 #define CLEAR_TASK_SET 0x0e
332 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */
333 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */
334 #define CLEAR_ACA 0x16
335 #define LOGICAL_UNIT_RESET 0x17
336 #define SIMPLE_QUEUE_TAG 0x20
337 #define HEAD_OF_QUEUE_TAG 0x21
338 #define ORDERED_QUEUE_TAG 0x22
339 #define IGNORE_WIDE_RESIDUE 0x23
341 #define QAS_REQUEST 0x55
343 /* Old SCSI2 names, don't use in new code */
344 #define BUS_DEVICE_RESET TARGET_RESET
345 #define ABORT ABORT_TASK_SET
351 #define DID_OK 0x00 /* NO error */
352 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
353 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
354 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
355 #define DID_BAD_TARGET 0x04 /* BAD target. */
356 #define DID_ABORT 0x05 /* Told to abort for some other reason */
357 #define DID_PARITY 0x06 /* Parity error */
358 #define DID_ERROR 0x07 /* Internal error */
359 #define DID_RESET 0x08 /* Reset by somebody. */
360 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
361 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
362 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
363 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
364 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
365 * without decrementing the retry count */
366 #define DRIVER_OK 0x00 /* Driver status */
369 * These indicate the error that occurred, and what is available.
372 #define DRIVER_BUSY 0x01
373 #define DRIVER_SOFT 0x02
374 #define DRIVER_MEDIA 0x03
375 #define DRIVER_ERROR 0x04
377 #define DRIVER_INVALID 0x05
378 #define DRIVER_TIMEOUT 0x06
379 #define DRIVER_HARD 0x07
380 #define DRIVER_SENSE 0x08
382 #define SUGGEST_RETRY 0x10
383 #define SUGGEST_ABORT 0x20
384 #define SUGGEST_REMAP 0x30
385 #define SUGGEST_DIE 0x40
386 #define SUGGEST_SENSE 0x80
387 #define SUGGEST_IS_OK 0xff
389 #define DRIVER_MASK 0x0f
390 #define SUGGEST_MASK 0xf0
393 * Internal return values.
396 #define NEEDS_RETRY 0x2001
397 #define SUCCESS 0x2002
398 #define FAILED 0x2003
399 #define QUEUED 0x2004
400 #define SOFT_ERROR 0x2005
401 #define ADD_TO_MLQUEUE 0x2006
402 #define TIMEOUT_ERROR 0x2007
405 * Midlevel queue return values.
407 #define SCSI_MLQUEUE_HOST_BUSY 0x1055
408 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
409 #define SCSI_MLQUEUE_EH_RETRY 0x1057
412 * Use these to separate status msg and our bytes
416 * status byte = set from target device
417 * msg_byte = return status from host adapter itself.
418 * host_byte = set by low-level driver to indicate status.
419 * driver_byte = set by mid-level.
421 #define status_byte(result) (((result) >> 1) & 0x7f)
422 #define msg_byte(result) (((result) >> 8) & 0xff)
423 #define host_byte(result) (((result) >> 16) & 0xff)
424 #define driver_byte(result) (((result) >> 24) & 0xff)
425 #define suggestion(result) (driver_byte(result) & SUGGEST_MASK)
427 #define sense_class(sense) (((sense) >> 4) & 0x7)
428 #define sense_error(sense) ((sense) & 0xf)
429 #define sense_valid(sense) ((sense) & 0x80);
434 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
435 #define START_STOP_TIMEOUT (60 * HZ)
436 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
437 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
438 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
441 #define IDENTIFY_BASE 0x80
442 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
443 ((can_disconnect) ? 0x40 : 0) |\
447 * struct scsi_device::scsi_level values. For SCSI devices other than those
448 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
449 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level
450 * variable is visible to the user via sysfs.
453 #define SCSI_UNKNOWN 0
457 #define SCSI_3 4 /* SPC */
462 * INQ PERIPHERAL QUALIFIERS
464 #define SCSI_INQ_PQ_CON 0x00
465 #define SCSI_INQ_PQ_NOT_CON 0x01
466 #define SCSI_INQ_PQ_NOT_CAP 0x03
470 * Here are some scsi specific ioctl commands which are sometimes useful.
472 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
475 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
476 #define SCSI_IOCTL_GET_IDLUN 0x5382
478 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
480 /* Used to obtain the host number of a device. */
481 #define SCSI_IOCTL_PROBE_HOST 0x5385
483 /* Used to obtain the bus number for a device */
484 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
486 /* Used to obtain the PCI location of a device */
487 #define SCSI_IOCTL_GET_PCI 0x5387
489 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
490 static inline __u32 scsi_to_u32(__u8 *ptr)
492 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
495 #endif /* _SCSI_SCSI_H */