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>
16 * The maximum number of SG segments that we will put inside a
17 * scatterlist (unless chaining is used). Should ideally fit inside a
18 * single page, to avoid a higher order allocation. We could define this
19 * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The
22 #define SCSI_MAX_SG_SEGMENTS 128
25 * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
26 * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
28 #ifdef ARCH_HAS_SG_CHAIN
29 #define SCSI_MAX_SG_CHAIN_SEGMENTS 2048
31 #define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS
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 XDWRITEREAD_10 0x53
101 #define MODE_SELECT_10 0x55
102 #define RESERVE_10 0x56
103 #define RELEASE_10 0x57
104 #define MODE_SENSE_10 0x5a
105 #define PERSISTENT_RESERVE_IN 0x5e
106 #define PERSISTENT_RESERVE_OUT 0x5f
107 #define VARIABLE_LENGTH_CMD 0x7f
108 #define REPORT_LUNS 0xa0
109 #define MAINTENANCE_IN 0xa3
110 #define MAINTENANCE_OUT 0xa4
111 #define MOVE_MEDIUM 0xa5
112 #define EXCHANGE_MEDIUM 0xa6
114 #define WRITE_12 0xaa
115 #define WRITE_VERIFY_12 0xae
116 #define SEARCH_HIGH_12 0xb0
117 #define SEARCH_EQUAL_12 0xb1
118 #define SEARCH_LOW_12 0xb2
119 #define READ_ELEMENT_STATUS 0xb8
120 #define SEND_VOLUME_TAG 0xb6
121 #define WRITE_LONG_2 0xea
123 #define WRITE_16 0x8a
124 #define VERIFY_16 0x8f
125 #define SERVICE_ACTION_IN 0x9e
126 /* values for service action in */
127 #define SAI_READ_CAPACITY_16 0x10
128 /* values for maintenance in */
129 #define MI_REPORT_TARGET_PGS 0x0a
130 /* values for maintenance out */
131 #define MO_SET_TARGET_PGS 0x0a
133 /* Values for T10/04-262r7 */
134 #define ATA_16 0x85 /* 16-byte pass-thru */
135 #define ATA_12 0xa1 /* 12-byte pass-thru */
138 * SCSI command lengths
141 #define SCSI_MAX_VARLEN_CDB_SIZE 260
143 /* defined in T10 SCSI Primary Commands-2 (SPC2) */
144 struct scsi_varlen_cdb_hdr {
145 u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */
148 u8 additional_cdb_length; /* total cdb length - 8 */
149 __be16 service_action;
150 /* service specific data follows */
153 static inline unsigned
154 scsi_varlen_cdb_length(const void *hdr)
156 return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
159 extern const unsigned char scsi_command_size_tbl[8];
160 #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
162 static inline unsigned
163 scsi_command_size(const unsigned char *cmnd)
165 return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
166 scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
170 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
171 * T10/1561-D Revision 4 Draft dated 7th November 2002.
173 #define SAM_STAT_GOOD 0x00
174 #define SAM_STAT_CHECK_CONDITION 0x02
175 #define SAM_STAT_CONDITION_MET 0x04
176 #define SAM_STAT_BUSY 0x08
177 #define SAM_STAT_INTERMEDIATE 0x10
178 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
179 #define SAM_STAT_RESERVATION_CONFLICT 0x18
180 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
181 #define SAM_STAT_TASK_SET_FULL 0x28
182 #define SAM_STAT_ACA_ACTIVE 0x30
183 #define SAM_STAT_TASK_ABORTED 0x40
185 /** scsi_status_is_good - check the status return.
187 * @status: the status passed up from the driver (including host and
190 * This returns true for known good conditions that may be treated as
191 * command completed normally
193 static inline int scsi_status_is_good(int status)
196 * FIXME: bit0 is listed as reserved in SCSI-2, but is
197 * significant in SCSI-3. For now, we follow the SCSI-2
198 * behaviour and ignore reserved bits.
201 return ((status == SAM_STAT_GOOD) ||
202 (status == SAM_STAT_INTERMEDIATE) ||
203 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
204 /* FIXME: this is obsolete in SAM-3 */
205 (status == SAM_STAT_COMMAND_TERMINATED));
209 * Status codes. These are deprecated as they are shifted 1 bit right
210 * from those found in the SCSI standards. This causes confusion for
211 * applications that are ported to several OSes. Prefer SAM Status codes
216 #define CHECK_CONDITION 0x01
217 #define CONDITION_GOOD 0x02
219 #define INTERMEDIATE_GOOD 0x08
220 #define INTERMEDIATE_C_GOOD 0x0a
221 #define RESERVATION_CONFLICT 0x0c
222 #define COMMAND_TERMINATED 0x11
223 #define QUEUE_FULL 0x14
224 #define ACA_ACTIVE 0x18
225 #define TASK_ABORTED 0x20
227 #define STATUS_MASK 0xfe
233 #define NO_SENSE 0x00
234 #define RECOVERED_ERROR 0x01
235 #define NOT_READY 0x02
236 #define MEDIUM_ERROR 0x03
237 #define HARDWARE_ERROR 0x04
238 #define ILLEGAL_REQUEST 0x05
239 #define UNIT_ATTENTION 0x06
240 #define DATA_PROTECT 0x07
241 #define BLANK_CHECK 0x08
242 #define COPY_ABORTED 0x0a
243 #define ABORTED_COMMAND 0x0b
244 #define VOLUME_OVERFLOW 0x0d
245 #define MISCOMPARE 0x0e
250 * Please keep them in 0x%02x format for $MODALIAS to work
253 #define TYPE_DISK 0x00
254 #define TYPE_TAPE 0x01
255 #define TYPE_PRINTER 0x02
256 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */
257 #define TYPE_WORM 0x04 /* Treated as ROM by our system */
258 #define TYPE_ROM 0x05
259 #define TYPE_SCANNER 0x06
260 #define TYPE_MOD 0x07 /* Magneto-optical disk -
261 * - treated as TYPE_DISK */
262 #define TYPE_MEDIUM_CHANGER 0x08
263 #define TYPE_COMM 0x09 /* Communications device */
264 #define TYPE_RAID 0x0c
265 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
266 #define TYPE_RBC 0x0e
267 #define TYPE_OSD 0x11
268 #define TYPE_NO_LUN 0x7f
270 /* SCSI protocols; these are taken from SPC-3 section 7.5 */
272 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */
273 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */
274 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */
275 SCSI_PROTOCOL_SBP = 3, /* firewire */
276 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */
277 SCSI_PROTOCOL_ISCSI = 5,
278 SCSI_PROTOCOL_SAS = 6,
279 SCSI_PROTOCOL_ADT = 7, /* Media Changers */
280 SCSI_PROTOCOL_ATA = 8,
281 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
284 /* Returns a human-readable name for the device */
285 extern const char * scsi_device_type(unsigned type);
288 * standard mode-select header prepended to all mode-select commands
291 struct ccs_modesel_head {
292 __u8 _r1; /* reserved */
293 __u8 medium; /* device-specific medium type */
294 __u8 _r2; /* reserved */
295 __u8 block_desc_length; /* block descriptor length */
296 __u8 density; /* device-specific density code */
297 __u8 number_blocks_hi; /* number of blocks in this block desc */
298 __u8 number_blocks_med;
299 __u8 number_blocks_lo;
301 __u8 block_length_hi; /* block length for blocks in this desc */
302 __u8 block_length_med;
303 __u8 block_length_lo;
307 * ScsiLun: 8 byte LUN.
314 * The Well Known LUNS (SAM-3) in our int representation of a LUN
316 #define SCSI_W_LUN_BASE 0xc100
317 #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
318 #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
319 #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
321 static inline int scsi_is_wlun(unsigned int lun)
323 return (lun & 0xff00) == SCSI_W_LUN_BASE;
331 #define COMMAND_COMPLETE 0x00
332 #define EXTENDED_MESSAGE 0x01
333 #define EXTENDED_MODIFY_DATA_POINTER 0x00
334 #define EXTENDED_SDTR 0x01
335 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
336 #define EXTENDED_WDTR 0x03
337 #define EXTENDED_PPR 0x04
338 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
339 #define SAVE_POINTERS 0x02
340 #define RESTORE_POINTERS 0x03
341 #define DISCONNECT 0x04
342 #define INITIATOR_ERROR 0x05
343 #define ABORT_TASK_SET 0x06
344 #define MESSAGE_REJECT 0x07
346 #define MSG_PARITY_ERROR 0x09
347 #define LINKED_CMD_COMPLETE 0x0a
348 #define LINKED_FLG_CMD_COMPLETE 0x0b
349 #define TARGET_RESET 0x0c
350 #define ABORT_TASK 0x0d
351 #define CLEAR_TASK_SET 0x0e
352 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */
353 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */
354 #define CLEAR_ACA 0x16
355 #define LOGICAL_UNIT_RESET 0x17
356 #define SIMPLE_QUEUE_TAG 0x20
357 #define HEAD_OF_QUEUE_TAG 0x21
358 #define ORDERED_QUEUE_TAG 0x22
359 #define IGNORE_WIDE_RESIDUE 0x23
361 #define QAS_REQUEST 0x55
363 /* Old SCSI2 names, don't use in new code */
364 #define BUS_DEVICE_RESET TARGET_RESET
365 #define ABORT ABORT_TASK_SET
371 #define DID_OK 0x00 /* NO error */
372 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
373 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
374 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
375 #define DID_BAD_TARGET 0x04 /* BAD target. */
376 #define DID_ABORT 0x05 /* Told to abort for some other reason */
377 #define DID_PARITY 0x06 /* Parity error */
378 #define DID_ERROR 0x07 /* Internal error */
379 #define DID_RESET 0x08 /* Reset by somebody. */
380 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
381 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
382 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
383 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
384 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
385 * without decrementing the retry count */
386 #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
387 * and the driver blocked the port to
388 * recover the link. Transport class will
389 * retry or fail IO */
390 #define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */
391 #define DRIVER_OK 0x00 /* Driver status */
394 * These indicate the error that occurred, and what is available.
397 #define DRIVER_BUSY 0x01
398 #define DRIVER_SOFT 0x02
399 #define DRIVER_MEDIA 0x03
400 #define DRIVER_ERROR 0x04
402 #define DRIVER_INVALID 0x05
403 #define DRIVER_TIMEOUT 0x06
404 #define DRIVER_HARD 0x07
405 #define DRIVER_SENSE 0x08
408 * Internal return values.
411 #define NEEDS_RETRY 0x2001
412 #define SUCCESS 0x2002
413 #define FAILED 0x2003
414 #define QUEUED 0x2004
415 #define SOFT_ERROR 0x2005
416 #define ADD_TO_MLQUEUE 0x2006
417 #define TIMEOUT_ERROR 0x2007
418 #define SCSI_RETURN_NOT_HANDLED 0x2008
421 * Midlevel queue return values.
423 #define SCSI_MLQUEUE_HOST_BUSY 0x1055
424 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
425 #define SCSI_MLQUEUE_EH_RETRY 0x1057
426 #define SCSI_MLQUEUE_TARGET_BUSY 0x1058
429 * Use these to separate status msg and our bytes
433 * status byte = set from target device
434 * msg_byte = return status from host adapter itself.
435 * host_byte = set by low-level driver to indicate status.
436 * driver_byte = set by mid-level.
438 #define status_byte(result) (((result) >> 1) & 0x7f)
439 #define msg_byte(result) (((result) >> 8) & 0xff)
440 #define host_byte(result) (((result) >> 16) & 0xff)
441 #define driver_byte(result) (((result) >> 24) & 0xff)
443 #define sense_class(sense) (((sense) >> 4) & 0x7)
444 #define sense_error(sense) ((sense) & 0xf)
445 #define sense_valid(sense) ((sense) & 0x80);
450 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
451 #define START_STOP_TIMEOUT (60 * HZ)
452 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
453 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
454 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
457 #define IDENTIFY_BASE 0x80
458 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
459 ((can_disconnect) ? 0x40 : 0) |\
463 * struct scsi_device::scsi_level values. For SCSI devices other than those
464 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
465 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level
466 * variable is visible to the user via sysfs.
469 #define SCSI_UNKNOWN 0
473 #define SCSI_3 4 /* SPC */
478 * INQ PERIPHERAL QUALIFIERS
480 #define SCSI_INQ_PQ_CON 0x00
481 #define SCSI_INQ_PQ_NOT_CON 0x01
482 #define SCSI_INQ_PQ_NOT_CAP 0x03
486 * Here are some scsi specific ioctl commands which are sometimes useful.
488 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
491 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
492 #define SCSI_IOCTL_GET_IDLUN 0x5382
494 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
496 /* Used to obtain the host number of a device. */
497 #define SCSI_IOCTL_PROBE_HOST 0x5385
499 /* Used to obtain the bus number for a device */
500 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
502 /* Used to obtain the PCI location of a device */
503 #define SCSI_IOCTL_GET_PCI 0x5387
505 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
506 static inline __u32 scsi_to_u32(__u8 *ptr)
508 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
511 #endif /* _SCSI_SCSI_H */