1 /*
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>
12
13 #ifdef __KERNEL__
14 #include <linux/scatterlist.h>
15 #include <linux/kernel.h>
16
17 struct scsi_cmnd;
18
19 enum scsi_timeouts {
20 SCSI_DEFAULT_EH_TIMEOUT = 10 * HZ,
21 };
22
23 /*
24 * The maximum number of SG segments that we will put inside a
25 * scatterlist (unless chaining is used). Should ideally fit inside a
26 * single page, to avoid a higher order allocation. We could define this
27 * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The
28 * minimum value is 32
29 */
30 #define SCSI_MAX_SG_SEGMENTS 128
31
32 /*
33 * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
34 * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
35 */
36 #ifdef CONFIG_ARCH_HAS_SG_CHAIN
37 #define SCSI_MAX_SG_CHAIN_SEGMENTS 2048
38 #else
39 #define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS
40 #endif
41
42 /*
43 * DIX-capable adapters effectively support infinite chaining for the
44 * protection information scatterlist
45 */
46 #define SCSI_MAX_PROT_SG_SEGMENTS 0xFFFF
47
48 /*
49 * Special value for scanning to specify scanning or rescanning of all
50 * possible channels, (target) ids, or luns on a given shost.
51 */
52 #define SCAN_WILD_CARD ~0
53 #endif /* __KERNEL__ */
54
55 /*
56 * SCSI opcodes
57 */
58
59 #define TEST_UNIT_READY 0x00
60 #define REZERO_UNIT 0x01
61 #define REQUEST_SENSE 0x03
62 #define FORMAT_UNIT 0x04
63 #define READ_BLOCK_LIMITS 0x05
64 #define REASSIGN_BLOCKS 0x07
65 #define INITIALIZE_ELEMENT_STATUS 0x07
66 #define READ_6 0x08
67 #define WRITE_6 0x0a
68 #define SEEK_6 0x0b
69 #define READ_REVERSE 0x0f
70 #define WRITE_FILEMARKS 0x10
71 #define SPACE 0x11
72 #define INQUIRY 0x12
73 #define RECOVER_BUFFERED_DATA 0x14
74 #define MODE_SELECT 0x15
75 #define RESERVE 0x16
76 #define RELEASE 0x17
77 #define COPY 0x18
78 #define ERASE 0x19
79 #define MODE_SENSE 0x1a
80 #define START_STOP 0x1b
81 #define RECEIVE_DIAGNOSTIC 0x1c
82 #define SEND_DIAGNOSTIC 0x1d
83 #define ALLOW_MEDIUM_REMOVAL 0x1e
84
85 #define READ_FORMAT_CAPACITIES 0x23
86 #define SET_WINDOW 0x24
87 #define READ_CAPACITY 0x25
88 #define READ_10 0x28
89 #define WRITE_10 0x2a
90 #define SEEK_10 0x2b
91 #define POSITION_TO_ELEMENT 0x2b
92 #define WRITE_VERIFY 0x2e
93 #define VERIFY 0x2f
94 #define SEARCH_HIGH 0x30
95 #define SEARCH_EQUAL 0x31
96 #define SEARCH_LOW 0x32
97 #define SET_LIMITS 0x33
98 #define PRE_FETCH 0x34
99 #define READ_POSITION 0x34
100 #define SYNCHRONIZE_CACHE 0x35
101 #define LOCK_UNLOCK_CACHE 0x36
102 #define READ_DEFECT_DATA 0x37
103 #define MEDIUM_SCAN 0x38
104 #define COMPARE 0x39
105 #define COPY_VERIFY 0x3a
106 #define WRITE_BUFFER 0x3b
107 #define READ_BUFFER 0x3c
108 #define UPDATE_BLOCK 0x3d
109 #define READ_LONG 0x3e
110 #define WRITE_LONG 0x3f
111 #define CHANGE_DEFINITION 0x40
112 #define WRITE_SAME 0x41
113 #define UNMAP 0x42
114 #define READ_TOC 0x43
115 #define READ_HEADER 0x44
116 #define GET_EVENT_STATUS_NOTIFICATION 0x4a
117 #define LOG_SELECT 0x4c
118 #define LOG_SENSE 0x4d
119 #define XDWRITEREAD_10 0x53
120 #define MODE_SELECT_10 0x55
121 #define RESERVE_10 0x56
122 #define RELEASE_10 0x57
123 #define MODE_SENSE_10 0x5a
124 #define PERSISTENT_RESERVE_IN 0x5e
125 #define PERSISTENT_RESERVE_OUT 0x5f
126 #define VARIABLE_LENGTH_CMD 0x7f
127 #define REPORT_LUNS 0xa0
128 #define SECURITY_PROTOCOL_IN 0xa2
129 #define MAINTENANCE_IN 0xa3
130 #define MAINTENANCE_OUT 0xa4
131 #define MOVE_MEDIUM 0xa5
132 #define EXCHANGE_MEDIUM 0xa6
133 #define READ_12 0xa8
134 #define WRITE_12 0xaa
135 #define READ_MEDIA_SERIAL_NUMBER 0xab
136 #define WRITE_VERIFY_12 0xae
137 #define VERIFY_12 0xaf
138 #define SEARCH_HIGH_12 0xb0
139 #define SEARCH_EQUAL_12 0xb1
140 #define SEARCH_LOW_12 0xb2
141 #define SECURITY_PROTOCOL_OUT 0xb5
142 #define READ_ELEMENT_STATUS 0xb8
143 #define SEND_VOLUME_TAG 0xb6
144 #define WRITE_LONG_2 0xea
145 #define EXTENDED_COPY 0x83
146 #define RECEIVE_COPY_RESULTS 0x84
147 #define ACCESS_CONTROL_IN 0x86
148 #define ACCESS_CONTROL_OUT 0x87
149 #define READ_16 0x88
150 #define COMPARE_AND_WRITE 0x89
151 #define WRITE_16 0x8a
152 #define READ_ATTRIBUTE 0x8c
153 #define WRITE_ATTRIBUTE 0x8d
154 #define VERIFY_16 0x8f
155 #define SYNCHRONIZE_CACHE_16 0x91
156 #define WRITE_SAME_16 0x93
157 #define SERVICE_ACTION_IN 0x9e
158 #ifdef __KERNEL__
159 /* values for service action in */
160 #define SAI_READ_CAPACITY_16 0x10
161 #define SAI_GET_LBA_STATUS 0x12
162 #define SAI_REPORT_REFERRALS 0x13
163 /* values for VARIABLE_LENGTH_CMD service action codes
164 * see spc4r17 Section D.3.5, table D.7 and D.8 */
165 #define VLC_SA_RECEIVE_CREDENTIAL 0x1800
166 /* values for maintenance in */
167 #define MI_REPORT_IDENTIFYING_INFORMATION 0x05
168 #define MI_REPORT_TARGET_PGS 0x0a
169 #define MI_REPORT_ALIASES 0x0b
170 #define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
171 #define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
172 #define MI_REPORT_PRIORITY 0x0e
173 #define MI_REPORT_TIMESTAMP 0x0f
174 #define MI_MANAGEMENT_PROTOCOL_IN 0x10
175 /* value for MI_REPORT_TARGET_PGS ext header */
176 #define MI_EXT_HDR_PARAM_FMT 0x20
177 /* values for maintenance out */
178 #define MO_SET_IDENTIFYING_INFORMATION 0x06
179 #define MO_SET_TARGET_PGS 0x0a
180 #define MO_CHANGE_ALIASES 0x0b
181 #define MO_SET_PRIORITY 0x0e
182 #define MO_SET_TIMESTAMP 0x0f
183 #define MO_MANAGEMENT_PROTOCOL_OUT 0x10
184 /* values for variable length command */
185 #define XDREAD_32 0x03
186 #define XDWRITE_32 0x04
187 #define XPWRITE_32 0x06
188 #define XDWRITEREAD_32 0x07
189 #define READ_32 0x09
190 #define VERIFY_32 0x0a
191 #define WRITE_32 0x0b
192 #define WRITE_SAME_32 0x0d
193
194 /* Values for T10/04-262r7 */
195 #define ATA_16 0x85 /* 16-byte pass-thru */
196 #define ATA_12 0xa1 /* 12-byte pass-thru */
197
198 /*
199 * SCSI command lengths
200 */
201
202 #define SCSI_MAX_VARLEN_CDB_SIZE 260
203
204 /* defined in T10 SCSI Primary Commands-2 (SPC2) */
205 struct scsi_varlen_cdb_hdr {
206 __u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */
207 __u8 control;
208 __u8 misc[5];
209 __u8 additional_cdb_length; /* total cdb length - 8 */
210 __be16 service_action;
211 /* service specific data follows */
212 };
213
214 static inline unsigned
scsi_varlen_cdb_length(const void * hdr)215 scsi_varlen_cdb_length(const void *hdr)
216 {
217 return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
218 }
219
220 extern const unsigned char scsi_command_size_tbl[8];
221 #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
222
223 static inline unsigned
scsi_command_size(const unsigned char * cmnd)224 scsi_command_size(const unsigned char *cmnd)
225 {
226 return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
227 scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
228 }
229
230 #ifdef CONFIG_ACPI
231 struct acpi_bus_type;
232
233 extern int
234 scsi_register_acpi_bus_type(struct acpi_bus_type *bus);
235
236 extern void
237 scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus);
238 #endif
239
240 /*
241 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
242 * T10/1561-D Revision 4 Draft dated 7th November 2002.
243 */
244 #define SAM_STAT_GOOD 0x00
245 #define SAM_STAT_CHECK_CONDITION 0x02
246 #define SAM_STAT_CONDITION_MET 0x04
247 #define SAM_STAT_BUSY 0x08
248 #define SAM_STAT_INTERMEDIATE 0x10
249 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
250 #define SAM_STAT_RESERVATION_CONFLICT 0x18
251 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */
252 #define SAM_STAT_TASK_SET_FULL 0x28
253 #define SAM_STAT_ACA_ACTIVE 0x30
254 #define SAM_STAT_TASK_ABORTED 0x40
255
256 /** scsi_status_is_good - check the status return.
257 *
258 * @status: the status passed up from the driver (including host and
259 * driver components)
260 *
261 * This returns true for known good conditions that may be treated as
262 * command completed normally
263 */
scsi_status_is_good(int status)264 static inline int scsi_status_is_good(int status)
265 {
266 /*
267 * FIXME: bit0 is listed as reserved in SCSI-2, but is
268 * significant in SCSI-3. For now, we follow the SCSI-2
269 * behaviour and ignore reserved bits.
270 */
271 status &= 0xfe;
272 return ((status == SAM_STAT_GOOD) ||
273 (status == SAM_STAT_INTERMEDIATE) ||
274 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
275 /* FIXME: this is obsolete in SAM-3 */
276 (status == SAM_STAT_COMMAND_TERMINATED));
277 }
278 #endif /* __KERNEL__ */
279
280 /*
281 * Status codes. These are deprecated as they are shifted 1 bit right
282 * from those found in the SCSI standards. This causes confusion for
283 * applications that are ported to several OSes. Prefer SAM Status codes
284 * above.
285 */
286
287 #define GOOD 0x00
288 #define CHECK_CONDITION 0x01
289 #define CONDITION_GOOD 0x02
290 #define BUSY 0x04
291 #define INTERMEDIATE_GOOD 0x08
292 #define INTERMEDIATE_C_GOOD 0x0a
293 #define RESERVATION_CONFLICT 0x0c
294 #define COMMAND_TERMINATED 0x11
295 #define QUEUE_FULL 0x14
296 #define ACA_ACTIVE 0x18
297 #define TASK_ABORTED 0x20
298
299 #define STATUS_MASK 0xfe
300
301 /*
302 * SENSE KEYS
303 */
304
305 #define NO_SENSE 0x00
306 #define RECOVERED_ERROR 0x01
307 #define NOT_READY 0x02
308 #define MEDIUM_ERROR 0x03
309 #define HARDWARE_ERROR 0x04
310 #define ILLEGAL_REQUEST 0x05
311 #define UNIT_ATTENTION 0x06
312 #define DATA_PROTECT 0x07
313 #define BLANK_CHECK 0x08
314 #define COPY_ABORTED 0x0a
315 #define ABORTED_COMMAND 0x0b
316 #define VOLUME_OVERFLOW 0x0d
317 #define MISCOMPARE 0x0e
318
319
320 /*
321 * DEVICE TYPES
322 * Please keep them in 0x%02x format for $MODALIAS to work
323 */
324
325 #define TYPE_DISK 0x00
326 #define TYPE_TAPE 0x01
327 #define TYPE_PRINTER 0x02
328 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */
329 #define TYPE_WORM 0x04 /* Treated as ROM by our system */
330 #define TYPE_ROM 0x05
331 #define TYPE_SCANNER 0x06
332 #define TYPE_MOD 0x07 /* Magneto-optical disk -
333 * - treated as TYPE_DISK */
334 #define TYPE_MEDIUM_CHANGER 0x08
335 #define TYPE_COMM 0x09 /* Communications device */
336 #define TYPE_RAID 0x0c
337 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */
338 #define TYPE_RBC 0x0e
339 #define TYPE_OSD 0x11
340 #define TYPE_ZBC 0x14
341 #define TYPE_WLUN 0x1e /* well-known logical unit */
342 #define TYPE_NO_LUN 0x7f
343
344 #ifdef __KERNEL__
345 /* SCSI protocols; these are taken from SPC-3 section 7.5 */
346 enum scsi_protocol {
347 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */
348 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */
349 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */
350 SCSI_PROTOCOL_SBP = 3, /* firewire */
351 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */
352 SCSI_PROTOCOL_ISCSI = 5,
353 SCSI_PROTOCOL_SAS = 6,
354 SCSI_PROTOCOL_ADT = 7, /* Media Changers */
355 SCSI_PROTOCOL_ATA = 8,
356 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
357 };
358
359 /* Returns a human-readable name for the device */
360 extern const char * scsi_device_type(unsigned type);
361 #endif
362
363 /*
364 * standard mode-select header prepended to all mode-select commands
365 */
366
367 struct ccs_modesel_head {
368 __u8 _r1; /* reserved */
369 __u8 medium; /* device-specific medium type */
370 __u8 _r2; /* reserved */
371 __u8 block_desc_length; /* block descriptor length */
372 __u8 density; /* device-specific density code */
373 __u8 number_blocks_hi; /* number of blocks in this block desc */
374 __u8 number_blocks_med;
375 __u8 number_blocks_lo;
376 __u8 _r3;
377 __u8 block_length_hi; /* block length for blocks in this desc */
378 __u8 block_length_med;
379 __u8 block_length_lo;
380 };
381
382 #ifdef __KERNEL__
383 /*
384 * ScsiLun: 8 byte LUN.
385 */
386 struct scsi_lun {
387 __u8 scsi_lun[8];
388 };
389
390 /*
391 * The Well Known LUNS (SAM-3) in our int representation of a LUN
392 */
393 #define SCSI_W_LUN_BASE 0xc100
394 #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
395 #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
396 #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
397
scsi_is_wlun(u64 lun)398 static inline int scsi_is_wlun(u64 lun)
399 {
400 return (lun & 0xff00) == SCSI_W_LUN_BASE;
401 }
402 #endif
403
404 /*
405 * MESSAGE CODES
406 */
407
408 #define COMMAND_COMPLETE 0x00
409 #define EXTENDED_MESSAGE 0x01
410 #define EXTENDED_MODIFY_DATA_POINTER 0x00
411 #define EXTENDED_SDTR 0x01
412 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */
413 #define EXTENDED_WDTR 0x03
414 #define EXTENDED_PPR 0x04
415 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05
416 #define SAVE_POINTERS 0x02
417 #define RESTORE_POINTERS 0x03
418 #define DISCONNECT 0x04
419 #define INITIATOR_ERROR 0x05
420 #define ABORT_TASK_SET 0x06
421 #define MESSAGE_REJECT 0x07
422 #define NOP 0x08
423 #define MSG_PARITY_ERROR 0x09
424 #define LINKED_CMD_COMPLETE 0x0a
425 #define LINKED_FLG_CMD_COMPLETE 0x0b
426 #define TARGET_RESET 0x0c
427 #define ABORT_TASK 0x0d
428 #define CLEAR_TASK_SET 0x0e
429 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */
430 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */
431 #define CLEAR_ACA 0x16
432 #define LOGICAL_UNIT_RESET 0x17
433 #define SIMPLE_QUEUE_TAG 0x20
434 #define HEAD_OF_QUEUE_TAG 0x21
435 #define ORDERED_QUEUE_TAG 0x22
436 #define IGNORE_WIDE_RESIDUE 0x23
437 #define ACA 0x24
438 #define QAS_REQUEST 0x55
439
440 /* Old SCSI2 names, don't use in new code */
441 #define BUS_DEVICE_RESET TARGET_RESET
442 #define ABORT ABORT_TASK_SET
443
444 #ifdef __KERNEL__
445 /*
446 * Host byte codes
447 */
448
449 #define DID_OK 0x00 /* NO error */
450 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */
451 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */
452 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */
453 #define DID_BAD_TARGET 0x04 /* BAD target. */
454 #define DID_ABORT 0x05 /* Told to abort for some other reason */
455 #define DID_PARITY 0x06 /* Parity error */
456 #define DID_ERROR 0x07 /* Internal error */
457 #define DID_RESET 0x08 /* Reset by somebody. */
458 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */
459 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */
460 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */
461 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */
462 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also
463 * without decrementing the retry count */
464 #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
465 * and the driver blocked the port to
466 * recover the link. Transport class will
467 * retry or fail IO */
468 #define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */
469 #define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on
470 * other paths */
471 #define DID_NEXUS_FAILURE 0x11 /* Permanent nexus failure, retry on other
472 * paths might yield different results */
473 #define DID_ALLOC_FAILURE 0x12 /* Space allocation on the device failed */
474 #define DID_MEDIUM_ERROR 0x13 /* Medium error */
475 #define DRIVER_OK 0x00 /* Driver status */
476
477 /*
478 * These indicate the error that occurred, and what is available.
479 */
480
481 #define DRIVER_BUSY 0x01
482 #define DRIVER_SOFT 0x02
483 #define DRIVER_MEDIA 0x03
484 #define DRIVER_ERROR 0x04
485
486 #define DRIVER_INVALID 0x05
487 #define DRIVER_TIMEOUT 0x06
488 #define DRIVER_HARD 0x07
489 #define DRIVER_SENSE 0x08
490
491 /*
492 * Internal return values.
493 */
494
495 #define NEEDS_RETRY 0x2001
496 #define SUCCESS 0x2002
497 #define FAILED 0x2003
498 #define QUEUED 0x2004
499 #define SOFT_ERROR 0x2005
500 #define ADD_TO_MLQUEUE 0x2006
501 #define TIMEOUT_ERROR 0x2007
502 #define SCSI_RETURN_NOT_HANDLED 0x2008
503 #define FAST_IO_FAIL 0x2009
504
505 /*
506 * Midlevel queue return values.
507 */
508 #define SCSI_MLQUEUE_HOST_BUSY 0x1055
509 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
510 #define SCSI_MLQUEUE_EH_RETRY 0x1057
511 #define SCSI_MLQUEUE_TARGET_BUSY 0x1058
512
513 /*
514 * Use these to separate status msg and our bytes
515 *
516 * These are set by:
517 *
518 * status byte = set from target device
519 * msg_byte = return status from host adapter itself.
520 * host_byte = set by low-level driver to indicate status.
521 * driver_byte = set by mid-level.
522 */
523 #define status_byte(result) (((result) >> 1) & 0x7f)
524 #define msg_byte(result) (((result) >> 8) & 0xff)
525 #define host_byte(result) (((result) >> 16) & 0xff)
526 #define driver_byte(result) (((result) >> 24) & 0xff)
527
528 #define sense_class(sense) (((sense) >> 4) & 0x7)
529 #define sense_error(sense) ((sense) & 0xf)
530 #define sense_valid(sense) ((sense) & 0x80)
531
532 /*
533 * default timeouts
534 */
535 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ)
536 #define START_STOP_TIMEOUT (60 * HZ)
537 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ)
538 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ)
539 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ )
540
541
542 #define IDENTIFY_BASE 0x80
543 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\
544 ((can_disconnect) ? 0x40 : 0) |\
545 ((lun) & 0x07))
546
547 /*
548 * struct scsi_device::scsi_level values. For SCSI devices other than those
549 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
550 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level
551 * variable is visible to the user via sysfs.
552 */
553
554 #define SCSI_UNKNOWN 0
555 #define SCSI_1 1
556 #define SCSI_1_CCS 2
557 #define SCSI_2 3
558 #define SCSI_3 4 /* SPC */
559 #define SCSI_SPC_2 5
560 #define SCSI_SPC_3 6
561
562 /*
563 * INQ PERIPHERAL QUALIFIERS
564 */
565 #define SCSI_INQ_PQ_CON 0x00
566 #define SCSI_INQ_PQ_NOT_CON 0x01
567 #define SCSI_INQ_PQ_NOT_CAP 0x03
568 #endif /* __KERNEL__ */
569
570 /*
571 * Here are some scsi specific ioctl commands which are sometimes useful.
572 *
573 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
574 */
575
576 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */
577 #define SCSI_IOCTL_GET_IDLUN 0x5382
578
579 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
580
581 /* Used to obtain the host number of a device. */
582 #define SCSI_IOCTL_PROBE_HOST 0x5385
583
584 /* Used to obtain the bus number for a device */
585 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
586
587 /* Used to obtain the PCI location of a device */
588 #define SCSI_IOCTL_GET_PCI 0x5387
589
590 #ifdef __KERNEL__
591 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
scsi_to_u32(__u8 * ptr)592 static inline __u32 scsi_to_u32(__u8 *ptr)
593 {
594 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
595 }
596 #endif /* __KERNEL__ */
597
598 #endif /* _SCSI_SCSI_H */
599