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 #include <linux/scatterlist.h>
13 
14 struct scsi_cmnd;
15 
16 /*
17  * The maximum number of SG segments that we will put inside a
18  * scatterlist (unless chaining is used). Should ideally fit inside a
19  * single page, to avoid a higher order allocation.  We could define this
20  * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order.  The
21  * minimum value is 32
22  */
23 #define SCSI_MAX_SG_SEGMENTS	128
24 
25 /*
26  * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
27  * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
28  */
29 #ifdef ARCH_HAS_SG_CHAIN
30 #define SCSI_MAX_SG_CHAIN_SEGMENTS	2048
31 #else
32 #define SCSI_MAX_SG_CHAIN_SEGMENTS	SCSI_MAX_SG_SEGMENTS
33 #endif
34 
35 /*
36  * DIX-capable adapters effectively support infinite chaining for the
37  * protection information scatterlist
38  */
39 #define SCSI_MAX_PROT_SG_SEGMENTS	0xFFFF
40 
41 /*
42  * Special value for scanning to specify scanning or rescanning of all
43  * possible channels, (target) ids, or luns on a given shost.
44  */
45 #define SCAN_WILD_CARD	~0
46 
47 /*
48  *      SCSI opcodes
49  */
50 
51 #define TEST_UNIT_READY       0x00
52 #define REZERO_UNIT           0x01
53 #define REQUEST_SENSE         0x03
54 #define FORMAT_UNIT           0x04
55 #define READ_BLOCK_LIMITS     0x05
56 #define REASSIGN_BLOCKS       0x07
57 #define INITIALIZE_ELEMENT_STATUS 0x07
58 #define READ_6                0x08
59 #define WRITE_6               0x0a
60 #define SEEK_6                0x0b
61 #define READ_REVERSE          0x0f
62 #define WRITE_FILEMARKS       0x10
63 #define SPACE                 0x11
64 #define INQUIRY               0x12
65 #define RECOVER_BUFFERED_DATA 0x14
66 #define MODE_SELECT           0x15
67 #define RESERVE               0x16
68 #define RELEASE               0x17
69 #define COPY                  0x18
70 #define ERASE                 0x19
71 #define MODE_SENSE            0x1a
72 #define START_STOP            0x1b
73 #define RECEIVE_DIAGNOSTIC    0x1c
74 #define SEND_DIAGNOSTIC       0x1d
75 #define ALLOW_MEDIUM_REMOVAL  0x1e
76 
77 #define READ_FORMAT_CAPACITIES 0x23
78 #define SET_WINDOW            0x24
79 #define READ_CAPACITY         0x25
80 #define READ_10               0x28
81 #define WRITE_10              0x2a
82 #define SEEK_10               0x2b
83 #define POSITION_TO_ELEMENT   0x2b
84 #define WRITE_VERIFY          0x2e
85 #define VERIFY                0x2f
86 #define SEARCH_HIGH           0x30
87 #define SEARCH_EQUAL          0x31
88 #define SEARCH_LOW            0x32
89 #define SET_LIMITS            0x33
90 #define PRE_FETCH             0x34
91 #define READ_POSITION         0x34
92 #define SYNCHRONIZE_CACHE     0x35
93 #define LOCK_UNLOCK_CACHE     0x36
94 #define READ_DEFECT_DATA      0x37
95 #define MEDIUM_SCAN           0x38
96 #define COMPARE               0x39
97 #define COPY_VERIFY           0x3a
98 #define WRITE_BUFFER          0x3b
99 #define READ_BUFFER           0x3c
100 #define UPDATE_BLOCK          0x3d
101 #define READ_LONG             0x3e
102 #define WRITE_LONG            0x3f
103 #define CHANGE_DEFINITION     0x40
104 #define WRITE_SAME            0x41
105 #define UNMAP		      0x42
106 #define READ_TOC              0x43
107 #define READ_HEADER           0x44
108 #define GET_EVENT_STATUS_NOTIFICATION 0x4a
109 #define LOG_SELECT            0x4c
110 #define LOG_SENSE             0x4d
111 #define XDWRITEREAD_10        0x53
112 #define MODE_SELECT_10        0x55
113 #define RESERVE_10            0x56
114 #define RELEASE_10            0x57
115 #define MODE_SENSE_10         0x5a
116 #define PERSISTENT_RESERVE_IN 0x5e
117 #define PERSISTENT_RESERVE_OUT 0x5f
118 #define VARIABLE_LENGTH_CMD   0x7f
119 #define REPORT_LUNS           0xa0
120 #define SECURITY_PROTOCOL_IN  0xa2
121 #define MAINTENANCE_IN        0xa3
122 #define MAINTENANCE_OUT       0xa4
123 #define MOVE_MEDIUM           0xa5
124 #define EXCHANGE_MEDIUM       0xa6
125 #define READ_12               0xa8
126 #define WRITE_12              0xaa
127 #define READ_MEDIA_SERIAL_NUMBER 0xab
128 #define WRITE_VERIFY_12       0xae
129 #define VERIFY_12	      0xaf
130 #define SEARCH_HIGH_12        0xb0
131 #define SEARCH_EQUAL_12       0xb1
132 #define SEARCH_LOW_12         0xb2
133 #define SECURITY_PROTOCOL_OUT 0xb5
134 #define READ_ELEMENT_STATUS   0xb8
135 #define SEND_VOLUME_TAG       0xb6
136 #define WRITE_LONG_2          0xea
137 #define EXTENDED_COPY         0x83
138 #define RECEIVE_COPY_RESULTS  0x84
139 #define ACCESS_CONTROL_IN     0x86
140 #define ACCESS_CONTROL_OUT    0x87
141 #define READ_16               0x88
142 #define WRITE_16              0x8a
143 #define READ_ATTRIBUTE        0x8c
144 #define WRITE_ATTRIBUTE	      0x8d
145 #define VERIFY_16	      0x8f
146 #define SYNCHRONIZE_CACHE_16  0x91
147 #define WRITE_SAME_16	      0x93
148 #define SERVICE_ACTION_IN     0x9e
149 /* values for service action in */
150 #define	SAI_READ_CAPACITY_16  0x10
151 #define SAI_GET_LBA_STATUS    0x12
152 /* values for VARIABLE_LENGTH_CMD service action codes
153  * see spc4r17 Section D.3.5, table D.7 and D.8 */
154 #define VLC_SA_RECEIVE_CREDENTIAL 0x1800
155 /* values for maintenance in */
156 #define MI_REPORT_IDENTIFYING_INFORMATION 0x05
157 #define MI_REPORT_TARGET_PGS  0x0a
158 #define MI_REPORT_ALIASES     0x0b
159 #define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
160 #define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
161 #define MI_REPORT_PRIORITY   0x0e
162 #define MI_REPORT_TIMESTAMP  0x0f
163 #define MI_MANAGEMENT_PROTOCOL_IN 0x10
164 /* values for maintenance out */
165 #define MO_SET_IDENTIFYING_INFORMATION 0x06
166 #define MO_SET_TARGET_PGS     0x0a
167 #define MO_CHANGE_ALIASES     0x0b
168 #define MO_SET_PRIORITY       0x0e
169 #define MO_SET_TIMESTAMP      0x0f
170 #define MO_MANAGEMENT_PROTOCOL_OUT 0x10
171 /* values for variable length command */
172 #define XDREAD_32	      0x03
173 #define XDWRITE_32	      0x04
174 #define XPWRITE_32	      0x06
175 #define XDWRITEREAD_32	      0x07
176 #define READ_32		      0x09
177 #define VERIFY_32	      0x0a
178 #define WRITE_32	      0x0b
179 #define WRITE_SAME_32	      0x0d
180 
181 /* Values for T10/04-262r7 */
182 #define	ATA_16		      0x85	/* 16-byte pass-thru */
183 #define	ATA_12		      0xa1	/* 12-byte pass-thru */
184 
185 /*
186  *	SCSI command lengths
187  */
188 
189 #define SCSI_MAX_VARLEN_CDB_SIZE 260
190 
191 /* defined in T10 SCSI Primary Commands-2 (SPC2) */
192 struct scsi_varlen_cdb_hdr {
193 	__u8 opcode;        /* opcode always == VARIABLE_LENGTH_CMD */
194 	__u8 control;
195 	__u8 misc[5];
196 	__u8 additional_cdb_length;         /* total cdb length - 8 */
197 	__be16 service_action;
198 	/* service specific data follows */
199 };
200 
201 static inline unsigned
scsi_varlen_cdb_length(const void * hdr)202 scsi_varlen_cdb_length(const void *hdr)
203 {
204 	return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
205 }
206 
207 extern const unsigned char scsi_command_size_tbl[8];
208 #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
209 
210 static inline unsigned
scsi_command_size(const unsigned char * cmnd)211 scsi_command_size(const unsigned char *cmnd)
212 {
213 	return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
214 		scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
215 }
216 
217 /*
218  *  SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
219  *  T10/1561-D Revision 4 Draft dated 7th November 2002.
220  */
221 #define SAM_STAT_GOOD            0x00
222 #define SAM_STAT_CHECK_CONDITION 0x02
223 #define SAM_STAT_CONDITION_MET   0x04
224 #define SAM_STAT_BUSY            0x08
225 #define SAM_STAT_INTERMEDIATE    0x10
226 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
227 #define SAM_STAT_RESERVATION_CONFLICT 0x18
228 #define SAM_STAT_COMMAND_TERMINATED 0x22	/* obsolete in SAM-3 */
229 #define SAM_STAT_TASK_SET_FULL   0x28
230 #define SAM_STAT_ACA_ACTIVE      0x30
231 #define SAM_STAT_TASK_ABORTED    0x40
232 
233 /** scsi_status_is_good - check the status return.
234  *
235  * @status: the status passed up from the driver (including host and
236  *          driver components)
237  *
238  * This returns true for known good conditions that may be treated as
239  * command completed normally
240  */
scsi_status_is_good(int status)241 static inline int scsi_status_is_good(int status)
242 {
243 	/*
244 	 * FIXME: bit0 is listed as reserved in SCSI-2, but is
245 	 * significant in SCSI-3.  For now, we follow the SCSI-2
246 	 * behaviour and ignore reserved bits.
247 	 */
248 	status &= 0xfe;
249 	return ((status == SAM_STAT_GOOD) ||
250 		(status == SAM_STAT_INTERMEDIATE) ||
251 		(status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
252 		/* FIXME: this is obsolete in SAM-3 */
253 		(status == SAM_STAT_COMMAND_TERMINATED));
254 }
255 
256 /*
257  *  Status codes. These are deprecated as they are shifted 1 bit right
258  *  from those found in the SCSI standards. This causes confusion for
259  *  applications that are ported to several OSes. Prefer SAM Status codes
260  *  above.
261  */
262 
263 #define GOOD                 0x00
264 #define CHECK_CONDITION      0x01
265 #define CONDITION_GOOD       0x02
266 #define BUSY                 0x04
267 #define INTERMEDIATE_GOOD    0x08
268 #define INTERMEDIATE_C_GOOD  0x0a
269 #define RESERVATION_CONFLICT 0x0c
270 #define COMMAND_TERMINATED   0x11
271 #define QUEUE_FULL           0x14
272 #define ACA_ACTIVE           0x18
273 #define TASK_ABORTED         0x20
274 
275 #define STATUS_MASK          0xfe
276 
277 /*
278  *  SENSE KEYS
279  */
280 
281 #define NO_SENSE            0x00
282 #define RECOVERED_ERROR     0x01
283 #define NOT_READY           0x02
284 #define MEDIUM_ERROR        0x03
285 #define HARDWARE_ERROR      0x04
286 #define ILLEGAL_REQUEST     0x05
287 #define UNIT_ATTENTION      0x06
288 #define DATA_PROTECT        0x07
289 #define BLANK_CHECK         0x08
290 #define COPY_ABORTED        0x0a
291 #define ABORTED_COMMAND     0x0b
292 #define VOLUME_OVERFLOW     0x0d
293 #define MISCOMPARE          0x0e
294 
295 
296 /*
297  *  DEVICE TYPES
298  *  Please keep them in 0x%02x format for $MODALIAS to work
299  */
300 
301 #define TYPE_DISK           0x00
302 #define TYPE_TAPE           0x01
303 #define TYPE_PRINTER        0x02
304 #define TYPE_PROCESSOR      0x03    /* HP scanners use this */
305 #define TYPE_WORM           0x04    /* Treated as ROM by our system */
306 #define TYPE_ROM            0x05
307 #define TYPE_SCANNER        0x06
308 #define TYPE_MOD            0x07    /* Magneto-optical disk -
309 				     * - treated as TYPE_DISK */
310 #define TYPE_MEDIUM_CHANGER 0x08
311 #define TYPE_COMM           0x09    /* Communications device */
312 #define TYPE_RAID           0x0c
313 #define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
314 #define TYPE_RBC	    0x0e
315 #define TYPE_OSD            0x11
316 #define TYPE_NO_LUN         0x7f
317 
318 /* SCSI protocols; these are taken from SPC-3 section 7.5 */
319 enum scsi_protocol {
320 	SCSI_PROTOCOL_FCP = 0,	/* Fibre Channel */
321 	SCSI_PROTOCOL_SPI = 1,	/* parallel SCSI */
322 	SCSI_PROTOCOL_SSA = 2,	/* Serial Storage Architecture - Obsolete */
323 	SCSI_PROTOCOL_SBP = 3,	/* firewire */
324 	SCSI_PROTOCOL_SRP = 4,	/* Infiniband RDMA */
325 	SCSI_PROTOCOL_ISCSI = 5,
326 	SCSI_PROTOCOL_SAS = 6,
327 	SCSI_PROTOCOL_ADT = 7,	/* Media Changers */
328 	SCSI_PROTOCOL_ATA = 8,
329 	SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
330 };
331 
332 /* Returns a human-readable name for the device */
333 extern const char * scsi_device_type(unsigned type);
334 
335 /*
336  * standard mode-select header prepended to all mode-select commands
337  */
338 
339 struct ccs_modesel_head {
340 	__u8 _r1;			/* reserved */
341 	__u8 medium;		/* device-specific medium type */
342 	__u8 _r2;			/* reserved */
343 	__u8 block_desc_length;	/* block descriptor length */
344 	__u8 density;		/* device-specific density code */
345 	__u8 number_blocks_hi;	/* number of blocks in this block desc */
346 	__u8 number_blocks_med;
347 	__u8 number_blocks_lo;
348 	__u8 _r3;
349 	__u8 block_length_hi;	/* block length for blocks in this desc */
350 	__u8 block_length_med;
351 	__u8 block_length_lo;
352 };
353 
354 /*
355  * ScsiLun: 8 byte LUN.
356  */
357 struct scsi_lun {
358 	__u8 scsi_lun[8];
359 };
360 
361 /*
362  * The Well Known LUNS (SAM-3) in our int representation of a LUN
363  */
364 #define SCSI_W_LUN_BASE 0xc100
365 #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
366 #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
367 #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
368 
scsi_is_wlun(unsigned int lun)369 static inline int scsi_is_wlun(unsigned int lun)
370 {
371 	return (lun & 0xff00) == SCSI_W_LUN_BASE;
372 }
373 
374 
375 /*
376  *  MESSAGE CODES
377  */
378 
379 #define COMMAND_COMPLETE    0x00
380 #define EXTENDED_MESSAGE    0x01
381 #define     EXTENDED_MODIFY_DATA_POINTER    0x00
382 #define     EXTENDED_SDTR                   0x01
383 #define     EXTENDED_EXTENDED_IDENTIFY      0x02    /* SCSI-I only */
384 #define     EXTENDED_WDTR                   0x03
385 #define     EXTENDED_PPR                    0x04
386 #define     EXTENDED_MODIFY_BIDI_DATA_PTR   0x05
387 #define SAVE_POINTERS       0x02
388 #define RESTORE_POINTERS    0x03
389 #define DISCONNECT          0x04
390 #define INITIATOR_ERROR     0x05
391 #define ABORT_TASK_SET      0x06
392 #define MESSAGE_REJECT      0x07
393 #define NOP                 0x08
394 #define MSG_PARITY_ERROR    0x09
395 #define LINKED_CMD_COMPLETE 0x0a
396 #define LINKED_FLG_CMD_COMPLETE 0x0b
397 #define TARGET_RESET        0x0c
398 #define ABORT_TASK          0x0d
399 #define CLEAR_TASK_SET      0x0e
400 #define INITIATE_RECOVERY   0x0f            /* SCSI-II only */
401 #define RELEASE_RECOVERY    0x10            /* SCSI-II only */
402 #define CLEAR_ACA           0x16
403 #define LOGICAL_UNIT_RESET  0x17
404 #define SIMPLE_QUEUE_TAG    0x20
405 #define HEAD_OF_QUEUE_TAG   0x21
406 #define ORDERED_QUEUE_TAG   0x22
407 #define IGNORE_WIDE_RESIDUE 0x23
408 #define ACA                 0x24
409 #define QAS_REQUEST         0x55
410 
411 /* Old SCSI2 names, don't use in new code */
412 #define BUS_DEVICE_RESET    TARGET_RESET
413 #define ABORT               ABORT_TASK_SET
414 
415 /*
416  * Host byte codes
417  */
418 
419 #define DID_OK          0x00	/* NO error                                */
420 #define DID_NO_CONNECT  0x01	/* Couldn't connect before timeout period  */
421 #define DID_BUS_BUSY    0x02	/* BUS stayed busy through time out period */
422 #define DID_TIME_OUT    0x03	/* TIMED OUT for other reason              */
423 #define DID_BAD_TARGET  0x04	/* BAD target.                             */
424 #define DID_ABORT       0x05	/* Told to abort for some other reason     */
425 #define DID_PARITY      0x06	/* Parity error                            */
426 #define DID_ERROR       0x07	/* Internal error                          */
427 #define DID_RESET       0x08	/* Reset by somebody.                      */
428 #define DID_BAD_INTR    0x09	/* Got an interrupt we weren't expecting.  */
429 #define DID_PASSTHROUGH 0x0a	/* Force command past mid-layer            */
430 #define DID_SOFT_ERROR  0x0b	/* The low level driver just wish a retry  */
431 #define DID_IMM_RETRY   0x0c	/* Retry without decrementing retry count  */
432 #define DID_REQUEUE	0x0d	/* Requeue command (no immediate retry) also
433 				 * without decrementing the retry count	   */
434 #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
435 				      * and the driver blocked the port to
436 				      * recover the link. Transport class will
437 				      * retry or fail IO */
438 #define DID_TRANSPORT_FAILFAST	0x0f /* Transport class fastfailed the io */
439 #define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on
440 				 * other paths */
441 #define DID_NEXUS_FAILURE 0x11  /* Permanent nexus failure, retry on other
442 				 * paths might yield different results */
443 #define DRIVER_OK       0x00	/* Driver status                           */
444 
445 /*
446  *  These indicate the error that occurred, and what is available.
447  */
448 
449 #define DRIVER_BUSY         0x01
450 #define DRIVER_SOFT         0x02
451 #define DRIVER_MEDIA        0x03
452 #define DRIVER_ERROR        0x04
453 
454 #define DRIVER_INVALID      0x05
455 #define DRIVER_TIMEOUT      0x06
456 #define DRIVER_HARD         0x07
457 #define DRIVER_SENSE	    0x08
458 
459 /*
460  * Internal return values.
461  */
462 
463 #define NEEDS_RETRY     0x2001
464 #define SUCCESS         0x2002
465 #define FAILED          0x2003
466 #define QUEUED          0x2004
467 #define SOFT_ERROR      0x2005
468 #define ADD_TO_MLQUEUE  0x2006
469 #define TIMEOUT_ERROR   0x2007
470 #define SCSI_RETURN_NOT_HANDLED   0x2008
471 #define FAST_IO_FAIL	0x2009
472 #define TARGET_ERROR    0x200A
473 
474 /*
475  * Midlevel queue return values.
476  */
477 #define SCSI_MLQUEUE_HOST_BUSY   0x1055
478 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
479 #define SCSI_MLQUEUE_EH_RETRY    0x1057
480 #define SCSI_MLQUEUE_TARGET_BUSY 0x1058
481 
482 /*
483  *  Use these to separate status msg and our bytes
484  *
485  *  These are set by:
486  *
487  *      status byte = set from target device
488  *      msg_byte    = return status from host adapter itself.
489  *      host_byte   = set by low-level driver to indicate status.
490  *      driver_byte = set by mid-level.
491  */
492 #define status_byte(result) (((result) >> 1) & 0x7f)
493 #define msg_byte(result)    (((result) >> 8) & 0xff)
494 #define host_byte(result)   (((result) >> 16) & 0xff)
495 #define driver_byte(result) (((result) >> 24) & 0xff)
496 
497 #define sense_class(sense)  (((sense) >> 4) & 0x7)
498 #define sense_error(sense)  ((sense) & 0xf)
499 #define sense_valid(sense)  ((sense) & 0x80)
500 
501 /*
502  * default timeouts
503 */
504 #define FORMAT_UNIT_TIMEOUT		(2 * 60 * 60 * HZ)
505 #define START_STOP_TIMEOUT		(60 * HZ)
506 #define MOVE_MEDIUM_TIMEOUT		(5 * 60 * HZ)
507 #define READ_ELEMENT_STATUS_TIMEOUT	(5 * 60 * HZ)
508 #define READ_DEFECT_DATA_TIMEOUT	(60 * HZ )
509 
510 
511 #define IDENTIFY_BASE       0x80
512 #define IDENTIFY(can_disconnect, lun)   (IDENTIFY_BASE |\
513 		     ((can_disconnect) ?  0x40 : 0) |\
514 		     ((lun) & 0x07))
515 
516 /*
517  *  struct scsi_device::scsi_level values. For SCSI devices other than those
518  *  prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
519  *  where "resp" is a byte array of the response to an INQUIRY. The scsi_level
520  *  variable is visible to the user via sysfs.
521  */
522 
523 #define SCSI_UNKNOWN    0
524 #define SCSI_1          1
525 #define SCSI_1_CCS      2
526 #define SCSI_2          3
527 #define SCSI_3          4        /* SPC */
528 #define SCSI_SPC_2      5
529 #define SCSI_SPC_3      6
530 
531 /*
532  * INQ PERIPHERAL QUALIFIERS
533  */
534 #define SCSI_INQ_PQ_CON         0x00
535 #define SCSI_INQ_PQ_NOT_CON     0x01
536 #define SCSI_INQ_PQ_NOT_CAP     0x03
537 
538 
539 /*
540  * Here are some scsi specific ioctl commands which are sometimes useful.
541  *
542  * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
543  */
544 
545 /* Used to obtain PUN and LUN info.  Conflicts with CDROMAUDIOBUFSIZ */
546 #define SCSI_IOCTL_GET_IDLUN		0x5382
547 
548 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
549 
550 /* Used to obtain the host number of a device. */
551 #define SCSI_IOCTL_PROBE_HOST		0x5385
552 
553 /* Used to obtain the bus number for a device */
554 #define SCSI_IOCTL_GET_BUS_NUMBER	0x5386
555 
556 /* Used to obtain the PCI location of a device */
557 #define SCSI_IOCTL_GET_PCI		0x5387
558 
559 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
scsi_to_u32(__u8 * ptr)560 static inline __u32 scsi_to_u32(__u8 *ptr)
561 {
562 	return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
563 }
564 
565 #endif /* _SCSI_SCSI_H */
566