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#include <linux/kernel.h> 14 15struct scsi_cmnd; 16 17enum scsi_timeouts { 18 SCSI_DEFAULT_EH_TIMEOUT = 10 * HZ, 19}; 20 21/* 22 * The maximum number of SG segments that we will put inside a 23 * scatterlist (unless chaining is used). Should ideally fit inside a 24 * single page, to avoid a higher order allocation. We could define this 25 * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The 26 * minimum value is 32 27 */ 28#define SCSI_MAX_SG_SEGMENTS 128 29 30/* 31 * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit 32 * is totally arbitrary, a setting of 2048 will get you at least 8mb ios. 33 */ 34#ifdef CONFIG_ARCH_HAS_SG_CHAIN 35#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048 36#else 37#define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS 38#endif 39 40/* 41 * DIX-capable adapters effectively support infinite chaining for the 42 * protection information scatterlist 43 */ 44#define SCSI_MAX_PROT_SG_SEGMENTS 0xFFFF 45 46/* 47 * Special value for scanning to specify scanning or rescanning of all 48 * possible channels, (target) ids, or luns on a given shost. 49 */ 50#define SCAN_WILD_CARD ~0 51 52/* 53 * SCSI opcodes 54 */ 55 56#define TEST_UNIT_READY 0x00 57#define REZERO_UNIT 0x01 58#define REQUEST_SENSE 0x03 59#define FORMAT_UNIT 0x04 60#define READ_BLOCK_LIMITS 0x05 61#define REASSIGN_BLOCKS 0x07 62#define INITIALIZE_ELEMENT_STATUS 0x07 63#define READ_6 0x08 64#define WRITE_6 0x0a 65#define SEEK_6 0x0b 66#define READ_REVERSE 0x0f 67#define WRITE_FILEMARKS 0x10 68#define SPACE 0x11 69#define INQUIRY 0x12 70#define RECOVER_BUFFERED_DATA 0x14 71#define MODE_SELECT 0x15 72#define RESERVE 0x16 73#define RELEASE 0x17 74#define COPY 0x18 75#define ERASE 0x19 76#define MODE_SENSE 0x1a 77#define START_STOP 0x1b 78#define RECEIVE_DIAGNOSTIC 0x1c 79#define SEND_DIAGNOSTIC 0x1d 80#define ALLOW_MEDIUM_REMOVAL 0x1e 81 82#define READ_FORMAT_CAPACITIES 0x23 83#define SET_WINDOW 0x24 84#define READ_CAPACITY 0x25 85#define READ_10 0x28 86#define WRITE_10 0x2a 87#define SEEK_10 0x2b 88#define POSITION_TO_ELEMENT 0x2b 89#define WRITE_VERIFY 0x2e 90#define VERIFY 0x2f 91#define SEARCH_HIGH 0x30 92#define SEARCH_EQUAL 0x31 93#define SEARCH_LOW 0x32 94#define SET_LIMITS 0x33 95#define PRE_FETCH 0x34 96#define READ_POSITION 0x34 97#define SYNCHRONIZE_CACHE 0x35 98#define LOCK_UNLOCK_CACHE 0x36 99#define READ_DEFECT_DATA 0x37 100#define MEDIUM_SCAN 0x38 101#define COMPARE 0x39 102#define COPY_VERIFY 0x3a 103#define WRITE_BUFFER 0x3b 104#define READ_BUFFER 0x3c 105#define UPDATE_BLOCK 0x3d 106#define READ_LONG 0x3e 107#define WRITE_LONG 0x3f 108#define CHANGE_DEFINITION 0x40 109#define WRITE_SAME 0x41 110#define UNMAP 0x42 111#define READ_TOC 0x43 112#define READ_HEADER 0x44 113#define GET_EVENT_STATUS_NOTIFICATION 0x4a 114#define LOG_SELECT 0x4c 115#define LOG_SENSE 0x4d 116#define XDWRITEREAD_10 0x53 117#define MODE_SELECT_10 0x55 118#define RESERVE_10 0x56 119#define RELEASE_10 0x57 120#define MODE_SENSE_10 0x5a 121#define PERSISTENT_RESERVE_IN 0x5e 122#define PERSISTENT_RESERVE_OUT 0x5f 123#define VARIABLE_LENGTH_CMD 0x7f 124#define REPORT_LUNS 0xa0 125#define SECURITY_PROTOCOL_IN 0xa2 126#define MAINTENANCE_IN 0xa3 127#define MAINTENANCE_OUT 0xa4 128#define MOVE_MEDIUM 0xa5 129#define EXCHANGE_MEDIUM 0xa6 130#define READ_12 0xa8 131#define SERVICE_ACTION_OUT_12 0xa9 132#define WRITE_12 0xaa 133#define READ_MEDIA_SERIAL_NUMBER 0xab /* Obsolete with SPC-2 */ 134#define SERVICE_ACTION_IN_12 0xab 135#define WRITE_VERIFY_12 0xae 136#define VERIFY_12 0xaf 137#define SEARCH_HIGH_12 0xb0 138#define SEARCH_EQUAL_12 0xb1 139#define SEARCH_LOW_12 0xb2 140#define SECURITY_PROTOCOL_OUT 0xb5 141#define READ_ELEMENT_STATUS 0xb8 142#define SEND_VOLUME_TAG 0xb6 143#define WRITE_LONG_2 0xea 144#define EXTENDED_COPY 0x83 145#define RECEIVE_COPY_RESULTS 0x84 146#define ACCESS_CONTROL_IN 0x86 147#define ACCESS_CONTROL_OUT 0x87 148#define READ_16 0x88 149#define COMPARE_AND_WRITE 0x89 150#define WRITE_16 0x8a 151#define READ_ATTRIBUTE 0x8c 152#define WRITE_ATTRIBUTE 0x8d 153#define VERIFY_16 0x8f 154#define SYNCHRONIZE_CACHE_16 0x91 155#define WRITE_SAME_16 0x93 156#define SERVICE_ACTION_BIDIRECTIONAL 0x9d 157#define SERVICE_ACTION_IN_16 0x9e 158#define SERVICE_ACTION_OUT_16 0x9f 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/* Vendor specific CDBs start here */ 199#define VENDOR_SPECIFIC_CDB 0xc0 200 201/* 202 * SCSI command lengths 203 */ 204 205#define SCSI_MAX_VARLEN_CDB_SIZE 260 206 207/* defined in T10 SCSI Primary Commands-2 (SPC2) */ 208struct scsi_varlen_cdb_hdr { 209 __u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */ 210 __u8 control; 211 __u8 misc[5]; 212 __u8 additional_cdb_length; /* total cdb length - 8 */ 213 __be16 service_action; 214 /* service specific data follows */ 215}; 216 217static inline unsigned 218scsi_varlen_cdb_length(const void *hdr) 219{ 220 return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8; 221} 222 223extern const unsigned char scsi_command_size_tbl[8]; 224#define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7] 225 226static inline unsigned 227scsi_command_size(const unsigned char *cmnd) 228{ 229 return (cmnd[0] == VARIABLE_LENGTH_CMD) ? 230 scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]); 231} 232 233#ifdef CONFIG_ACPI 234struct acpi_bus_type; 235 236extern int 237scsi_register_acpi_bus_type(struct acpi_bus_type *bus); 238 239extern void 240scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus); 241#endif 242 243/* 244 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft 245 * T10/1561-D Revision 4 Draft dated 7th November 2002. 246 */ 247#define SAM_STAT_GOOD 0x00 248#define SAM_STAT_CHECK_CONDITION 0x02 249#define SAM_STAT_CONDITION_MET 0x04 250#define SAM_STAT_BUSY 0x08 251#define SAM_STAT_INTERMEDIATE 0x10 252#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14 253#define SAM_STAT_RESERVATION_CONFLICT 0x18 254#define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */ 255#define SAM_STAT_TASK_SET_FULL 0x28 256#define SAM_STAT_ACA_ACTIVE 0x30 257#define SAM_STAT_TASK_ABORTED 0x40 258 259/** scsi_status_is_good - check the status return. 260 * 261 * @status: the status passed up from the driver (including host and 262 * driver components) 263 * 264 * This returns true for known good conditions that may be treated as 265 * command completed normally 266 */ 267static inline int scsi_status_is_good(int status) 268{ 269 /* 270 * FIXME: bit0 is listed as reserved in SCSI-2, but is 271 * significant in SCSI-3. For now, we follow the SCSI-2 272 * behaviour and ignore reserved bits. 273 */ 274 status &= 0xfe; 275 return ((status == SAM_STAT_GOOD) || 276 (status == SAM_STAT_INTERMEDIATE) || 277 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) || 278 /* FIXME: this is obsolete in SAM-3 */ 279 (status == SAM_STAT_COMMAND_TERMINATED)); 280} 281 282/* 283 * Status codes. These are deprecated as they are shifted 1 bit right 284 * from those found in the SCSI standards. This causes confusion for 285 * applications that are ported to several OSes. Prefer SAM Status codes 286 * above. 287 */ 288 289#define GOOD 0x00 290#define CHECK_CONDITION 0x01 291#define CONDITION_GOOD 0x02 292#define BUSY 0x04 293#define INTERMEDIATE_GOOD 0x08 294#define INTERMEDIATE_C_GOOD 0x0a 295#define RESERVATION_CONFLICT 0x0c 296#define COMMAND_TERMINATED 0x11 297#define QUEUE_FULL 0x14 298#define ACA_ACTIVE 0x18 299#define TASK_ABORTED 0x20 300 301#define STATUS_MASK 0xfe 302 303/* 304 * SENSE KEYS 305 */ 306 307#define NO_SENSE 0x00 308#define RECOVERED_ERROR 0x01 309#define NOT_READY 0x02 310#define MEDIUM_ERROR 0x03 311#define HARDWARE_ERROR 0x04 312#define ILLEGAL_REQUEST 0x05 313#define UNIT_ATTENTION 0x06 314#define DATA_PROTECT 0x07 315#define BLANK_CHECK 0x08 316#define COPY_ABORTED 0x0a 317#define ABORTED_COMMAND 0x0b 318#define VOLUME_OVERFLOW 0x0d 319#define MISCOMPARE 0x0e 320 321 322/* 323 * DEVICE TYPES 324 * Please keep them in 0x%02x format for $MODALIAS to work 325 */ 326 327#define TYPE_DISK 0x00 328#define TYPE_TAPE 0x01 329#define TYPE_PRINTER 0x02 330#define TYPE_PROCESSOR 0x03 /* HP scanners use this */ 331#define TYPE_WORM 0x04 /* Treated as ROM by our system */ 332#define TYPE_ROM 0x05 333#define TYPE_SCANNER 0x06 334#define TYPE_MOD 0x07 /* Magneto-optical disk - 335 * - treated as TYPE_DISK */ 336#define TYPE_MEDIUM_CHANGER 0x08 337#define TYPE_COMM 0x09 /* Communications device */ 338#define TYPE_RAID 0x0c 339#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */ 340#define TYPE_RBC 0x0e 341#define TYPE_OSD 0x11 342#define TYPE_ZBC 0x14 343#define TYPE_WLUN 0x1e /* well-known logical unit */ 344#define TYPE_NO_LUN 0x7f 345 346/* SCSI protocols; these are taken from SPC-3 section 7.5 */ 347enum scsi_protocol { 348 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */ 349 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */ 350 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */ 351 SCSI_PROTOCOL_SBP = 3, /* firewire */ 352 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */ 353 SCSI_PROTOCOL_ISCSI = 5, 354 SCSI_PROTOCOL_SAS = 6, 355 SCSI_PROTOCOL_ADT = 7, /* Media Changers */ 356 SCSI_PROTOCOL_ATA = 8, 357 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */ 358}; 359 360/* Returns a human-readable name for the device */ 361extern const char * scsi_device_type(unsigned type); 362 363/* 364 * standard mode-select header prepended to all mode-select commands 365 */ 366 367struct 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/* 383 * ScsiLun: 8 byte LUN. 384 */ 385struct scsi_lun { 386 __u8 scsi_lun[8]; 387}; 388 389/* 390 * The Well Known LUNS (SAM-3) in our int representation of a LUN 391 */ 392#define SCSI_W_LUN_BASE 0xc100 393#define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1) 394#define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2) 395#define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3) 396 397static inline int scsi_is_wlun(u64 lun) 398{ 399 return (lun & 0xff00) == SCSI_W_LUN_BASE; 400} 401 402 403/* 404 * MESSAGE CODES 405 */ 406 407#define COMMAND_COMPLETE 0x00 408#define EXTENDED_MESSAGE 0x01 409#define EXTENDED_MODIFY_DATA_POINTER 0x00 410#define EXTENDED_SDTR 0x01 411#define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */ 412#define EXTENDED_WDTR 0x03 413#define EXTENDED_PPR 0x04 414#define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05 415#define SAVE_POINTERS 0x02 416#define RESTORE_POINTERS 0x03 417#define DISCONNECT 0x04 418#define INITIATOR_ERROR 0x05 419#define ABORT_TASK_SET 0x06 420#define MESSAGE_REJECT 0x07 421#define NOP 0x08 422#define MSG_PARITY_ERROR 0x09 423#define LINKED_CMD_COMPLETE 0x0a 424#define LINKED_FLG_CMD_COMPLETE 0x0b 425#define TARGET_RESET 0x0c 426#define ABORT_TASK 0x0d 427#define CLEAR_TASK_SET 0x0e 428#define INITIATE_RECOVERY 0x0f /* SCSI-II only */ 429#define RELEASE_RECOVERY 0x10 /* SCSI-II only */ 430#define CLEAR_ACA 0x16 431#define LOGICAL_UNIT_RESET 0x17 432#define SIMPLE_QUEUE_TAG 0x20 433#define HEAD_OF_QUEUE_TAG 0x21 434#define ORDERED_QUEUE_TAG 0x22 435#define IGNORE_WIDE_RESIDUE 0x23 436#define ACA 0x24 437#define QAS_REQUEST 0x55 438 439/* Old SCSI2 names, don't use in new code */ 440#define BUS_DEVICE_RESET TARGET_RESET 441#define ABORT ABORT_TASK_SET 442 443/* 444 * Host byte codes 445 */ 446 447#define DID_OK 0x00 /* NO error */ 448#define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */ 449#define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */ 450#define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */ 451#define DID_BAD_TARGET 0x04 /* BAD target. */ 452#define DID_ABORT 0x05 /* Told to abort for some other reason */ 453#define DID_PARITY 0x06 /* Parity error */ 454#define DID_ERROR 0x07 /* Internal error */ 455#define DID_RESET 0x08 /* Reset by somebody. */ 456#define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */ 457#define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */ 458#define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */ 459#define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */ 460#define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also 461 * without decrementing the retry count */ 462#define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution 463 * and the driver blocked the port to 464 * recover the link. Transport class will 465 * retry or fail IO */ 466#define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */ 467#define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on 468 * other paths */ 469#define DID_NEXUS_FAILURE 0x11 /* Permanent nexus failure, retry on other 470 * paths might yield different results */ 471#define DID_ALLOC_FAILURE 0x12 /* Space allocation on the device failed */ 472#define DID_MEDIUM_ERROR 0x13 /* Medium error */ 473#define DRIVER_OK 0x00 /* Driver status */ 474 475/* 476 * These indicate the error that occurred, and what is available. 477 */ 478 479#define DRIVER_BUSY 0x01 480#define DRIVER_SOFT 0x02 481#define DRIVER_MEDIA 0x03 482#define DRIVER_ERROR 0x04 483 484#define DRIVER_INVALID 0x05 485#define DRIVER_TIMEOUT 0x06 486#define DRIVER_HARD 0x07 487#define DRIVER_SENSE 0x08 488 489/* 490 * Internal return values. 491 */ 492 493#define NEEDS_RETRY 0x2001 494#define SUCCESS 0x2002 495#define FAILED 0x2003 496#define QUEUED 0x2004 497#define SOFT_ERROR 0x2005 498#define ADD_TO_MLQUEUE 0x2006 499#define TIMEOUT_ERROR 0x2007 500#define SCSI_RETURN_NOT_HANDLED 0x2008 501#define FAST_IO_FAIL 0x2009 502 503/* 504 * Midlevel queue return values. 505 */ 506#define SCSI_MLQUEUE_HOST_BUSY 0x1055 507#define SCSI_MLQUEUE_DEVICE_BUSY 0x1056 508#define SCSI_MLQUEUE_EH_RETRY 0x1057 509#define SCSI_MLQUEUE_TARGET_BUSY 0x1058 510 511/* 512 * Use these to separate status msg and our bytes 513 * 514 * These are set by: 515 * 516 * status byte = set from target device 517 * msg_byte = return status from host adapter itself. 518 * host_byte = set by low-level driver to indicate status. 519 * driver_byte = set by mid-level. 520 */ 521#define status_byte(result) (((result) >> 1) & 0x7f) 522#define msg_byte(result) (((result) >> 8) & 0xff) 523#define host_byte(result) (((result) >> 16) & 0xff) 524#define driver_byte(result) (((result) >> 24) & 0xff) 525 526#define sense_class(sense) (((sense) >> 4) & 0x7) 527#define sense_error(sense) ((sense) & 0xf) 528#define sense_valid(sense) ((sense) & 0x80) 529 530/* 531 * default timeouts 532*/ 533#define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ) 534#define START_STOP_TIMEOUT (60 * HZ) 535#define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ) 536#define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ) 537#define READ_DEFECT_DATA_TIMEOUT (60 * HZ ) 538 539 540#define IDENTIFY_BASE 0x80 541#define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\ 542 ((can_disconnect) ? 0x40 : 0) |\ 543 ((lun) & 0x07)) 544 545/* 546 * struct scsi_device::scsi_level values. For SCSI devices other than those 547 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1) 548 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level 549 * variable is visible to the user via sysfs. 550 */ 551 552#define SCSI_UNKNOWN 0 553#define SCSI_1 1 554#define SCSI_1_CCS 2 555#define SCSI_2 3 556#define SCSI_3 4 /* SPC */ 557#define SCSI_SPC_2 5 558#define SCSI_SPC_3 6 559 560/* 561 * INQ PERIPHERAL QUALIFIERS 562 */ 563#define SCSI_INQ_PQ_CON 0x00 564#define SCSI_INQ_PQ_NOT_CON 0x01 565#define SCSI_INQ_PQ_NOT_CAP 0x03 566 567 568/* 569 * Here are some scsi specific ioctl commands which are sometimes useful. 570 * 571 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 572 */ 573 574/* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */ 575#define SCSI_IOCTL_GET_IDLUN 0x5382 576 577/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */ 578 579/* Used to obtain the host number of a device. */ 580#define SCSI_IOCTL_PROBE_HOST 0x5385 581 582/* Used to obtain the bus number for a device */ 583#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386 584 585/* Used to obtain the PCI location of a device */ 586#define SCSI_IOCTL_GET_PCI 0x5387 587 588/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */ 589static inline __u32 scsi_to_u32(__u8 *ptr) 590{ 591 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3]; 592} 593 594#endif /* _SCSI_SCSI_H */ 595