blob: 1418e9010f3e6c4be4cfce67ab645bfa2eeca1af [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This header file contains public constants and structures used by
3 * the scsi code for linux.
4 *
5 * For documentation on the OPCODES, MESSAGES, and SENSE values,
6 * please consult the SCSI standard.
7 */
8#ifndef _SCSI_SCSI_H
9#define _SCSI_SCSI_H
10
11#include <linux/types.h>
James Bottomleyf290f192009-02-08 21:59:48 -060012
13struct scsi_cmnd;
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
15/*
James Bottomleyd3f46f32008-01-15 11:11:46 -060016 * 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
20 * minimum value is 32
21 */
22#define SCSI_MAX_SG_SEGMENTS 128
23
24/*
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.
27 */
28#ifdef ARCH_HAS_SG_CHAIN
29#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048
30#else
31#define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS
32#endif
33
34/*
Christoph Hellwige02f3f52006-01-13 19:04:00 +010035 * Special value for scanning to specify scanning or rescanning of all
36 * possible channels, (target) ids, or luns on a given shost.
37 */
38#define SCAN_WILD_CARD ~0
39
40/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 * SCSI opcodes
42 */
43
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
Gerd Knorr daa6eda2005-05-10 10:59:13 +020050#define INITIALIZE_ELEMENT_STATUS 0x07
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define READ_6 0x08
52#define WRITE_6 0x0a
53#define SEEK_6 0x0b
54#define READ_REVERSE 0x0f
55#define WRITE_FILEMARKS 0x10
56#define SPACE 0x11
57#define INQUIRY 0x12
58#define RECOVER_BUFFERED_DATA 0x14
59#define MODE_SELECT 0x15
60#define RESERVE 0x16
61#define RELEASE 0x17
62#define COPY 0x18
63#define ERASE 0x19
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
69
Michal Nazarewicz0a6a7172010-10-07 14:46:15 +020070#define READ_FORMAT_CAPACITIES 0x23
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#define SET_WINDOW 0x24
72#define READ_CAPACITY 0x25
73#define READ_10 0x28
74#define WRITE_10 0x2a
75#define SEEK_10 0x2b
Gerd Knorr daa6eda2005-05-10 10:59:13 +020076#define POSITION_TO_ELEMENT 0x2b
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#define WRITE_VERIFY 0x2e
78#define VERIFY 0x2f
79#define SEARCH_HIGH 0x30
80#define SEARCH_EQUAL 0x31
81#define SEARCH_LOW 0x32
82#define SET_LIMITS 0x33
83#define PRE_FETCH 0x34
84#define READ_POSITION 0x34
85#define SYNCHRONIZE_CACHE 0x35
86#define LOCK_UNLOCK_CACHE 0x36
87#define READ_DEFECT_DATA 0x37
88#define MEDIUM_SCAN 0x38
89#define COMPARE 0x39
90#define COPY_VERIFY 0x3a
91#define WRITE_BUFFER 0x3b
92#define READ_BUFFER 0x3c
93#define UPDATE_BLOCK 0x3d
94#define READ_LONG 0x3e
95#define WRITE_LONG 0x3f
96#define CHANGE_DEFINITION 0x40
97#define WRITE_SAME 0x41
Martin K. Petersenf57e4502009-10-15 14:43:23 -040098#define UNMAP 0x42
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#define READ_TOC 0x43
Michal Nazarewicz0a6a7172010-10-07 14:46:15 +0200100#define READ_HEADER 0x44
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101#define LOG_SELECT 0x4c
102#define LOG_SENSE 0x4d
FUJITA Tomonoric639d142008-01-23 01:32:01 +0900103#define XDWRITEREAD_10 0x53
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104#define MODE_SELECT_10 0x55
105#define RESERVE_10 0x56
106#define RELEASE_10 0x57
107#define MODE_SENSE_10 0x5a
108#define PERSISTENT_RESERVE_IN 0x5e
109#define PERSISTENT_RESERVE_OUT 0x5f
Boaz Harroshdb4742d2008-04-30 11:27:26 +0300110#define VARIABLE_LENGTH_CMD 0x7f
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111#define REPORT_LUNS 0xa0
Hannes Reinecke5a09e392006-10-20 09:58:47 +0200112#define MAINTENANCE_IN 0xa3
Hannes Reinecke057ea7c2008-07-17 16:53:21 -0700113#define MAINTENANCE_OUT 0xa4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114#define MOVE_MEDIUM 0xa5
Gerd Knorr daa6eda2005-05-10 10:59:13 +0200115#define EXCHANGE_MEDIUM 0xa6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116#define READ_12 0xa8
117#define WRITE_12 0xaa
118#define WRITE_VERIFY_12 0xae
Martin K. Petersen59c31b62010-03-23 01:13:28 -0400119#define VERIFY_12 0xaf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120#define SEARCH_HIGH_12 0xb0
121#define SEARCH_EQUAL_12 0xb1
122#define SEARCH_LOW_12 0xb2
123#define READ_ELEMENT_STATUS 0xb8
124#define SEND_VOLUME_TAG 0xb6
125#define WRITE_LONG_2 0xea
126#define READ_16 0x88
127#define WRITE_16 0x8a
128#define VERIFY_16 0x8f
Martin K. Petersenf57e4502009-10-15 14:43:23 -0400129#define WRITE_SAME_16 0x93
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130#define SERVICE_ACTION_IN 0x9e
131/* values for service action in */
132#define SAI_READ_CAPACITY_16 0x10
Martin K. Petersenf57e4502009-10-15 14:43:23 -0400133#define SAI_GET_LBA_STATUS 0x12
Hannes Reinecke5a09e392006-10-20 09:58:47 +0200134/* values for maintenance in */
135#define MI_REPORT_TARGET_PGS 0x0a
Hannes Reinecke057ea7c2008-07-17 16:53:21 -0700136/* values for maintenance out */
137#define MO_SET_TARGET_PGS 0x0a
Martin K. Petersen4e7392e2009-09-20 16:49:38 -0400138/* values for variable length command */
139#define READ_32 0x09
Martin K. Petersen59c31b62010-03-23 01:13:28 -0400140#define VERIFY_32 0x0a
Martin K. Petersen4e7392e2009-09-20 16:49:38 -0400141#define WRITE_32 0x0b
Martin K. Petersenf57e4502009-10-15 14:43:23 -0400142#define WRITE_SAME_32 0x0d
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Jeff Garzikb0955182005-05-12 15:45:22 -0400144/* Values for T10/04-262r7 */
145#define ATA_16 0x85 /* 16-byte pass-thru */
146#define ATA_12 0xa1 /* 12-byte pass-thru */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
148/*
Boaz Harroshdb4742d2008-04-30 11:27:26 +0300149 * SCSI command lengths
150 */
151
152#define SCSI_MAX_VARLEN_CDB_SIZE 260
153
154/* defined in T10 SCSI Primary Commands-2 (SPC2) */
155struct scsi_varlen_cdb_hdr {
Peter Korsgaard083c8c12010-08-10 18:01:24 -0700156 __u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */
157 __u8 control;
158 __u8 misc[5];
159 __u8 additional_cdb_length; /* total cdb length - 8 */
Boaz Harroshdb4742d2008-04-30 11:27:26 +0300160 __be16 service_action;
161 /* service specific data follows */
162};
163
164static inline unsigned
165scsi_varlen_cdb_length(const void *hdr)
166{
167 return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
168}
169
170extern const unsigned char scsi_command_size_tbl[8];
171#define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
172
173static inline unsigned
174scsi_command_size(const unsigned char *cmnd)
175{
176 return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
177 scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
178}
179
180/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
182 * T10/1561-D Revision 4 Draft dated 7th November 2002.
183 */
184#define SAM_STAT_GOOD 0x00
185#define SAM_STAT_CHECK_CONDITION 0x02
186#define SAM_STAT_CONDITION_MET 0x04
187#define SAM_STAT_BUSY 0x08
188#define SAM_STAT_INTERMEDIATE 0x10
189#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
190#define SAM_STAT_RESERVATION_CONFLICT 0x18
191#define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
192#define SAM_STAT_TASK_SET_FULL 0x28
193#define SAM_STAT_ACA_ACTIVE 0x30
194#define SAM_STAT_TASK_ABORTED 0x40
195
196/** scsi_status_is_good - check the status return.
197 *
198 * @status: the status passed up from the driver (including host and
199 * driver components)
200 *
201 * This returns true for known good conditions that may be treated as
202 * command completed normally
203 */
204static inline int scsi_status_is_good(int status)
205{
206 /*
207 * FIXME: bit0 is listed as reserved in SCSI-2, but is
208 * significant in SCSI-3. For now, we follow the SCSI-2
209 * behaviour and ignore reserved bits.
210 */
211 status &= 0xfe;
212 return ((status == SAM_STAT_GOOD) ||
213 (status == SAM_STAT_INTERMEDIATE) ||
214 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
215 /* FIXME: this is obsolete in SAM-3 */
216 (status == SAM_STAT_COMMAND_TERMINATED));
217}
218
219/*
220 * Status codes. These are deprecated as they are shifted 1 bit right
221 * from those found in the SCSI standards. This causes confusion for
222 * applications that are ported to several OSes. Prefer SAM Status codes
223 * above.
224 */
225
226#define GOOD 0x00
227#define CHECK_CONDITION 0x01
228#define CONDITION_GOOD 0x02
229#define BUSY 0x04
230#define INTERMEDIATE_GOOD 0x08
231#define INTERMEDIATE_C_GOOD 0x0a
232#define RESERVATION_CONFLICT 0x0c
233#define COMMAND_TERMINATED 0x11
234#define QUEUE_FULL 0x14
235#define ACA_ACTIVE 0x18
236#define TASK_ABORTED 0x20
237
238#define STATUS_MASK 0xfe
239
240/*
241 * SENSE KEYS
242 */
243
244#define NO_SENSE 0x00
245#define RECOVERED_ERROR 0x01
246#define NOT_READY 0x02
247#define MEDIUM_ERROR 0x03
248#define HARDWARE_ERROR 0x04
249#define ILLEGAL_REQUEST 0x05
250#define UNIT_ATTENTION 0x06
251#define DATA_PROTECT 0x07
252#define BLANK_CHECK 0x08
253#define COPY_ABORTED 0x0a
254#define ABORTED_COMMAND 0x0b
255#define VOLUME_OVERFLOW 0x0d
256#define MISCOMPARE 0x0e
257
258
259/*
260 * DEVICE TYPES
Michael Tokarevd7b8bcb2006-10-27 16:02:37 +0400261 * Please keep them in 0x%02x format for $MODALIAS to work
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 */
263
264#define TYPE_DISK 0x00
265#define TYPE_TAPE 0x01
266#define TYPE_PRINTER 0x02
267#define TYPE_PROCESSOR 0x03 /* HP scanners use this */
268#define TYPE_WORM 0x04 /* Treated as ROM by our system */
269#define TYPE_ROM 0x05
270#define TYPE_SCANNER 0x06
271#define TYPE_MOD 0x07 /* Magneto-optical disk -
272 * - treated as TYPE_DISK */
273#define TYPE_MEDIUM_CHANGER 0x08
274#define TYPE_COMM 0x09 /* Communications device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275#define TYPE_RAID 0x0c
James Bottomley7f602c52005-05-21 10:24:37 -0500276#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
Al Viro 631e8a12005-05-16 01:59:55 +0100277#define TYPE_RBC 0x0e
Boaz Harrosh82443a52009-01-25 16:51:33 +0200278#define TYPE_OSD 0x11
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279#define TYPE_NO_LUN 0x7f
280
James Bottomley89dddbc2008-02-03 15:32:59 -0600281/* SCSI protocols; these are taken from SPC-3 section 7.5 */
282enum scsi_protocol {
283 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */
284 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */
285 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */
286 SCSI_PROTOCOL_SBP = 3, /* firewire */
287 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */
288 SCSI_PROTOCOL_ISCSI = 5,
289 SCSI_PROTOCOL_SAS = 6,
290 SCSI_PROTOCOL_ADT = 7, /* Media Changers */
291 SCSI_PROTOCOL_ATA = 8,
292 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
293};
294
Matthew Wilcox4ff36712006-07-04 12:15:20 -0600295/* Returns a human-readable name for the device */
296extern const char * scsi_device_type(unsigned type);
297
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298/*
299 * standard mode-select header prepended to all mode-select commands
300 */
301
302struct ccs_modesel_head {
303 __u8 _r1; /* reserved */
304 __u8 medium; /* device-specific medium type */
305 __u8 _r2; /* reserved */
306 __u8 block_desc_length; /* block descriptor length */
307 __u8 density; /* device-specific density code */
308 __u8 number_blocks_hi; /* number of blocks in this block desc */
309 __u8 number_blocks_med;
310 __u8 number_blocks_lo;
311 __u8 _r3;
312 __u8 block_length_hi; /* block length for blocks in this desc */
313 __u8 block_length_med;
314 __u8 block_length_lo;
315};
316
317/*
318 * ScsiLun: 8 byte LUN.
319 */
320struct scsi_lun {
321 __u8 scsi_lun[8];
322};
323
324/*
James Bottomley01b291b2008-08-21 15:14:14 -0500325 * The Well Known LUNS (SAM-3) in our int representation of a LUN
326 */
327#define SCSI_W_LUN_BASE 0xc100
328#define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
329#define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
330#define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
331
332static inline int scsi_is_wlun(unsigned int lun)
333{
334 return (lun & 0xff00) == SCSI_W_LUN_BASE;
335}
336
337
338/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 * MESSAGE CODES
340 */
341
342#define COMMAND_COMPLETE 0x00
343#define EXTENDED_MESSAGE 0x01
344#define EXTENDED_MODIFY_DATA_POINTER 0x00
345#define EXTENDED_SDTR 0x01
346#define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
347#define EXTENDED_WDTR 0x03
348#define EXTENDED_PPR 0x04
349#define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
350#define SAVE_POINTERS 0x02
351#define RESTORE_POINTERS 0x03
352#define DISCONNECT 0x04
353#define INITIATOR_ERROR 0x05
354#define ABORT_TASK_SET 0x06
355#define MESSAGE_REJECT 0x07
356#define NOP 0x08
357#define MSG_PARITY_ERROR 0x09
358#define LINKED_CMD_COMPLETE 0x0a
359#define LINKED_FLG_CMD_COMPLETE 0x0b
360#define TARGET_RESET 0x0c
361#define ABORT_TASK 0x0d
362#define CLEAR_TASK_SET 0x0e
363#define INITIATE_RECOVERY 0x0f /* SCSI-II only */
364#define RELEASE_RECOVERY 0x10 /* SCSI-II only */
365#define CLEAR_ACA 0x16
366#define LOGICAL_UNIT_RESET 0x17
367#define SIMPLE_QUEUE_TAG 0x20
368#define HEAD_OF_QUEUE_TAG 0x21
369#define ORDERED_QUEUE_TAG 0x22
370#define IGNORE_WIDE_RESIDUE 0x23
371#define ACA 0x24
372#define QAS_REQUEST 0x55
373
374/* Old SCSI2 names, don't use in new code */
375#define BUS_DEVICE_RESET TARGET_RESET
376#define ABORT ABORT_TASK_SET
377
378/*
379 * Host byte codes
380 */
381
382#define DID_OK 0x00 /* NO error */
383#define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
384#define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
385#define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
386#define DID_BAD_TARGET 0x04 /* BAD target. */
387#define DID_ABORT 0x05 /* Told to abort for some other reason */
388#define DID_PARITY 0x06 /* Parity error */
389#define DID_ERROR 0x07 /* Internal error */
390#define DID_RESET 0x08 /* Reset by somebody. */
391#define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
392#define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
393#define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
394#define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
bf341912005-04-12 17:49:09 -0500395#define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
396 * without decrementing the retry count */
Mike Christiea4dfaa62008-08-19 18:45:25 -0500397#define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
398 * and the driver blocked the port to
399 * recover the link. Transport class will
400 * retry or fail IO */
401#define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402#define DRIVER_OK 0x00 /* Driver status */
403
404/*
405 * These indicate the error that occurred, and what is available.
406 */
407
408#define DRIVER_BUSY 0x01
409#define DRIVER_SOFT 0x02
410#define DRIVER_MEDIA 0x03
411#define DRIVER_ERROR 0x04
412
413#define DRIVER_INVALID 0x05
414#define DRIVER_TIMEOUT 0x06
415#define DRIVER_HARD 0x07
416#define DRIVER_SENSE 0x08
417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418/*
419 * Internal return values.
420 */
421
422#define NEEDS_RETRY 0x2001
423#define SUCCESS 0x2002
424#define FAILED 0x2003
425#define QUEUED 0x2004
426#define SOFT_ERROR 0x2005
427#define ADD_TO_MLQUEUE 0x2006
428#define TIMEOUT_ERROR 0x2007
Chandra Seetharamana6a8d9f2008-05-01 14:49:46 -0700429#define SCSI_RETURN_NOT_HANDLED 0x2008
Christof Schmitt2f2eb582010-03-24 16:50:30 +0100430#define FAST_IO_FAIL 0x2009
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432/*
433 * Midlevel queue return values.
434 */
435#define SCSI_MLQUEUE_HOST_BUSY 0x1055
436#define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
437#define SCSI_MLQUEUE_EH_RETRY 0x1057
Mike Christief0c0a372008-08-17 15:24:38 -0500438#define SCSI_MLQUEUE_TARGET_BUSY 0x1058
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
440/*
441 * Use these to separate status msg and our bytes
442 *
443 * These are set by:
444 *
445 * status byte = set from target device
446 * msg_byte = return status from host adapter itself.
447 * host_byte = set by low-level driver to indicate status.
448 * driver_byte = set by mid-level.
449 */
450#define status_byte(result) (((result) >> 1) & 0x7f)
451#define msg_byte(result) (((result) >> 8) & 0xff)
452#define host_byte(result) (((result) >> 16) & 0xff)
453#define driver_byte(result) (((result) >> 24) & 0xff)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
455#define sense_class(sense) (((sense) >> 4) & 0x7)
456#define sense_error(sense) ((sense) & 0xf)
457#define sense_valid(sense) ((sense) & 0x80);
458
b6651122005-04-03 14:52:44 -0500459/*
460 * default timeouts
461*/
462#define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
463#define START_STOP_TIMEOUT (60 * HZ)
464#define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
465#define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
466#define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
469#define IDENTIFY_BASE 0x80
470#define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
471 ((can_disconnect) ? 0x40 : 0) |\
472 ((lun) & 0x07))
473
474/*
475 * struct scsi_device::scsi_level values. For SCSI devices other than those
476 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
477 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level
478 * variable is visible to the user via sysfs.
479 */
480
481#define SCSI_UNKNOWN 0
482#define SCSI_1 1
483#define SCSI_1_CCS 2
484#define SCSI_2 3
485#define SCSI_3 4 /* SPC */
486#define SCSI_SPC_2 5
487#define SCSI_SPC_3 6
488
489/*
490 * INQ PERIPHERAL QUALIFIERS
491 */
492#define SCSI_INQ_PQ_CON 0x00
493#define SCSI_INQ_PQ_NOT_CON 0x01
494#define SCSI_INQ_PQ_NOT_CAP 0x03
495
496
497/*
498 * Here are some scsi specific ioctl commands which are sometimes useful.
499 *
500 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
501 */
502
503/* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
504#define SCSI_IOCTL_GET_IDLUN 0x5382
505
506/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
507
508/* Used to obtain the host number of a device. */
509#define SCSI_IOCTL_PROBE_HOST 0x5385
510
511/* Used to obtain the bus number for a device */
512#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
513
514/* Used to obtain the PCI location of a device */
515#define SCSI_IOCTL_GET_PCI 0x5387
516
James Bottomley2908d772006-08-29 09:22:51 -0500517/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
FUJITA Tomonori4a531e82006-10-20 09:08:18 +0900518static inline __u32 scsi_to_u32(__u8 *ptr)
James Bottomley2908d772006-08-29 09:22:51 -0500519{
520 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
521}
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523#endif /* _SCSI_SCSI_H */