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 /* value for MI_REPORT_TARGET_PGS ext header */ 165 #define MI_EXT_HDR_PARAM_FMT 0x20 166 /* values for maintenance out */ 167 #define MO_SET_IDENTIFYING_INFORMATION 0x06 168 #define MO_SET_TARGET_PGS 0x0a 169 #define MO_CHANGE_ALIASES 0x0b 170 #define MO_SET_PRIORITY 0x0e 171 #define MO_SET_TIMESTAMP 0x0f 172 #define MO_MANAGEMENT_PROTOCOL_OUT 0x10 173 /* values for variable length command */ 174 #define XDREAD_32 0x03 175 #define XDWRITE_32 0x04 176 #define XPWRITE_32 0x06 177 #define XDWRITEREAD_32 0x07 178 #define READ_32 0x09 179 #define VERIFY_32 0x0a 180 #define WRITE_32 0x0b 181 #define WRITE_SAME_32 0x0d 182 183 /* Values for T10/04-262r7 */ 184 #define ATA_16 0x85 /* 16-byte pass-thru */ 185 #define ATA_12 0xa1 /* 12-byte pass-thru */ 186 187 /* 188 * SCSI command lengths 189 */ 190 191 #define SCSI_MAX_VARLEN_CDB_SIZE 260 192 193 /* defined in T10 SCSI Primary Commands-2 (SPC2) */ 194 struct scsi_varlen_cdb_hdr { 195 __u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */ 196 __u8 control; 197 __u8 misc[5]; 198 __u8 additional_cdb_length; /* total cdb length - 8 */ 199 __be16 service_action; 200 /* service specific data follows */ 201 }; 202 203 static inline unsigned 204 scsi_varlen_cdb_length(const void *hdr) 205 { 206 return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8; 207 } 208 209 extern const unsigned char scsi_command_size_tbl[8]; 210 #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7] 211 212 static inline unsigned 213 scsi_command_size(const unsigned char *cmnd) 214 { 215 return (cmnd[0] == VARIABLE_LENGTH_CMD) ? 216 scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]); 217 } 218 219 #ifdef CONFIG_ACPI 220 struct acpi_bus_type; 221 222 extern int 223 scsi_register_acpi_bus_type(struct acpi_bus_type *bus); 224 225 extern void 226 scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus); 227 #endif 228 229 /* 230 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft 231 * T10/1561-D Revision 4 Draft dated 7th November 2002. 232 */ 233 #define SAM_STAT_GOOD 0x00 234 #define SAM_STAT_CHECK_CONDITION 0x02 235 #define SAM_STAT_CONDITION_MET 0x04 236 #define SAM_STAT_BUSY 0x08 237 #define SAM_STAT_INTERMEDIATE 0x10 238 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14 239 #define SAM_STAT_RESERVATION_CONFLICT 0x18 240 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */ 241 #define SAM_STAT_TASK_SET_FULL 0x28 242 #define SAM_STAT_ACA_ACTIVE 0x30 243 #define SAM_STAT_TASK_ABORTED 0x40 244 245 /** scsi_status_is_good - check the status return. 246 * 247 * @status: the status passed up from the driver (including host and 248 * driver components) 249 * 250 * This returns true for known good conditions that may be treated as 251 * command completed normally 252 */ 253 static inline int scsi_status_is_good(int status) 254 { 255 /* 256 * FIXME: bit0 is listed as reserved in SCSI-2, but is 257 * significant in SCSI-3. For now, we follow the SCSI-2 258 * behaviour and ignore reserved bits. 259 */ 260 status &= 0xfe; 261 return ((status == SAM_STAT_GOOD) || 262 (status == SAM_STAT_INTERMEDIATE) || 263 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) || 264 /* FIXME: this is obsolete in SAM-3 */ 265 (status == SAM_STAT_COMMAND_TERMINATED)); 266 } 267 268 /* 269 * Status codes. These are deprecated as they are shifted 1 bit right 270 * from those found in the SCSI standards. This causes confusion for 271 * applications that are ported to several OSes. Prefer SAM Status codes 272 * above. 273 */ 274 275 #define GOOD 0x00 276 #define CHECK_CONDITION 0x01 277 #define CONDITION_GOOD 0x02 278 #define BUSY 0x04 279 #define INTERMEDIATE_GOOD 0x08 280 #define INTERMEDIATE_C_GOOD 0x0a 281 #define RESERVATION_CONFLICT 0x0c 282 #define COMMAND_TERMINATED 0x11 283 #define QUEUE_FULL 0x14 284 #define ACA_ACTIVE 0x18 285 #define TASK_ABORTED 0x20 286 287 #define STATUS_MASK 0xfe 288 289 /* 290 * SENSE KEYS 291 */ 292 293 #define NO_SENSE 0x00 294 #define RECOVERED_ERROR 0x01 295 #define NOT_READY 0x02 296 #define MEDIUM_ERROR 0x03 297 #define HARDWARE_ERROR 0x04 298 #define ILLEGAL_REQUEST 0x05 299 #define UNIT_ATTENTION 0x06 300 #define DATA_PROTECT 0x07 301 #define BLANK_CHECK 0x08 302 #define COPY_ABORTED 0x0a 303 #define ABORTED_COMMAND 0x0b 304 #define VOLUME_OVERFLOW 0x0d 305 #define MISCOMPARE 0x0e 306 307 308 /* 309 * DEVICE TYPES 310 * Please keep them in 0x%02x format for $MODALIAS to work 311 */ 312 313 #define TYPE_DISK 0x00 314 #define TYPE_TAPE 0x01 315 #define TYPE_PRINTER 0x02 316 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */ 317 #define TYPE_WORM 0x04 /* Treated as ROM by our system */ 318 #define TYPE_ROM 0x05 319 #define TYPE_SCANNER 0x06 320 #define TYPE_MOD 0x07 /* Magneto-optical disk - 321 * - treated as TYPE_DISK */ 322 #define TYPE_MEDIUM_CHANGER 0x08 323 #define TYPE_COMM 0x09 /* Communications device */ 324 #define TYPE_RAID 0x0c 325 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */ 326 #define TYPE_RBC 0x0e 327 #define TYPE_OSD 0x11 328 #define TYPE_NO_LUN 0x7f 329 330 /* SCSI protocols; these are taken from SPC-3 section 7.5 */ 331 enum scsi_protocol { 332 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */ 333 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */ 334 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */ 335 SCSI_PROTOCOL_SBP = 3, /* firewire */ 336 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */ 337 SCSI_PROTOCOL_ISCSI = 5, 338 SCSI_PROTOCOL_SAS = 6, 339 SCSI_PROTOCOL_ADT = 7, /* Media Changers */ 340 SCSI_PROTOCOL_ATA = 8, 341 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */ 342 }; 343 344 /* Returns a human-readable name for the device */ 345 extern const char * scsi_device_type(unsigned type); 346 347 /* 348 * standard mode-select header prepended to all mode-select commands 349 */ 350 351 struct ccs_modesel_head { 352 __u8 _r1; /* reserved */ 353 __u8 medium; /* device-specific medium type */ 354 __u8 _r2; /* reserved */ 355 __u8 block_desc_length; /* block descriptor length */ 356 __u8 density; /* device-specific density code */ 357 __u8 number_blocks_hi; /* number of blocks in this block desc */ 358 __u8 number_blocks_med; 359 __u8 number_blocks_lo; 360 __u8 _r3; 361 __u8 block_length_hi; /* block length for blocks in this desc */ 362 __u8 block_length_med; 363 __u8 block_length_lo; 364 }; 365 366 /* 367 * ScsiLun: 8 byte LUN. 368 */ 369 struct scsi_lun { 370 __u8 scsi_lun[8]; 371 }; 372 373 /* 374 * The Well Known LUNS (SAM-3) in our int representation of a LUN 375 */ 376 #define SCSI_W_LUN_BASE 0xc100 377 #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1) 378 #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2) 379 #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3) 380 381 static inline int scsi_is_wlun(unsigned int lun) 382 { 383 return (lun & 0xff00) == SCSI_W_LUN_BASE; 384 } 385 386 387 /* 388 * MESSAGE CODES 389 */ 390 391 #define COMMAND_COMPLETE 0x00 392 #define EXTENDED_MESSAGE 0x01 393 #define EXTENDED_MODIFY_DATA_POINTER 0x00 394 #define EXTENDED_SDTR 0x01 395 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */ 396 #define EXTENDED_WDTR 0x03 397 #define EXTENDED_PPR 0x04 398 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05 399 #define SAVE_POINTERS 0x02 400 #define RESTORE_POINTERS 0x03 401 #define DISCONNECT 0x04 402 #define INITIATOR_ERROR 0x05 403 #define ABORT_TASK_SET 0x06 404 #define MESSAGE_REJECT 0x07 405 #define NOP 0x08 406 #define MSG_PARITY_ERROR 0x09 407 #define LINKED_CMD_COMPLETE 0x0a 408 #define LINKED_FLG_CMD_COMPLETE 0x0b 409 #define TARGET_RESET 0x0c 410 #define ABORT_TASK 0x0d 411 #define CLEAR_TASK_SET 0x0e 412 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */ 413 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */ 414 #define CLEAR_ACA 0x16 415 #define LOGICAL_UNIT_RESET 0x17 416 #define SIMPLE_QUEUE_TAG 0x20 417 #define HEAD_OF_QUEUE_TAG 0x21 418 #define ORDERED_QUEUE_TAG 0x22 419 #define IGNORE_WIDE_RESIDUE 0x23 420 #define ACA 0x24 421 #define QAS_REQUEST 0x55 422 423 /* Old SCSI2 names, don't use in new code */ 424 #define BUS_DEVICE_RESET TARGET_RESET 425 #define ABORT ABORT_TASK_SET 426 427 /* 428 * Host byte codes 429 */ 430 431 #define DID_OK 0x00 /* NO error */ 432 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */ 433 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */ 434 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */ 435 #define DID_BAD_TARGET 0x04 /* BAD target. */ 436 #define DID_ABORT 0x05 /* Told to abort for some other reason */ 437 #define DID_PARITY 0x06 /* Parity error */ 438 #define DID_ERROR 0x07 /* Internal error */ 439 #define DID_RESET 0x08 /* Reset by somebody. */ 440 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */ 441 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */ 442 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */ 443 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */ 444 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also 445 * without decrementing the retry count */ 446 #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution 447 * and the driver blocked the port to 448 * recover the link. Transport class will 449 * retry or fail IO */ 450 #define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */ 451 #define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on 452 * other paths */ 453 #define DID_NEXUS_FAILURE 0x11 /* Permanent nexus failure, retry on other 454 * paths might yield different results */ 455 #define DRIVER_OK 0x00 /* Driver status */ 456 457 /* 458 * These indicate the error that occurred, and what is available. 459 */ 460 461 #define DRIVER_BUSY 0x01 462 #define DRIVER_SOFT 0x02 463 #define DRIVER_MEDIA 0x03 464 #define DRIVER_ERROR 0x04 465 466 #define DRIVER_INVALID 0x05 467 #define DRIVER_TIMEOUT 0x06 468 #define DRIVER_HARD 0x07 469 #define DRIVER_SENSE 0x08 470 471 /* 472 * Internal return values. 473 */ 474 475 #define NEEDS_RETRY 0x2001 476 #define SUCCESS 0x2002 477 #define FAILED 0x2003 478 #define QUEUED 0x2004 479 #define SOFT_ERROR 0x2005 480 #define ADD_TO_MLQUEUE 0x2006 481 #define TIMEOUT_ERROR 0x2007 482 #define SCSI_RETURN_NOT_HANDLED 0x2008 483 #define FAST_IO_FAIL 0x2009 484 #define TARGET_ERROR 0x200A 485 486 /* 487 * Midlevel queue return values. 488 */ 489 #define SCSI_MLQUEUE_HOST_BUSY 0x1055 490 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056 491 #define SCSI_MLQUEUE_EH_RETRY 0x1057 492 #define SCSI_MLQUEUE_TARGET_BUSY 0x1058 493 494 /* 495 * Use these to separate status msg and our bytes 496 * 497 * These are set by: 498 * 499 * status byte = set from target device 500 * msg_byte = return status from host adapter itself. 501 * host_byte = set by low-level driver to indicate status. 502 * driver_byte = set by mid-level. 503 */ 504 #define status_byte(result) (((result) >> 1) & 0x7f) 505 #define msg_byte(result) (((result) >> 8) & 0xff) 506 #define host_byte(result) (((result) >> 16) & 0xff) 507 #define driver_byte(result) (((result) >> 24) & 0xff) 508 509 #define sense_class(sense) (((sense) >> 4) & 0x7) 510 #define sense_error(sense) ((sense) & 0xf) 511 #define sense_valid(sense) ((sense) & 0x80) 512 513 /* 514 * default timeouts 515 */ 516 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ) 517 #define START_STOP_TIMEOUT (60 * HZ) 518 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ) 519 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ) 520 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ ) 521 522 523 #define IDENTIFY_BASE 0x80 524 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\ 525 ((can_disconnect) ? 0x40 : 0) |\ 526 ((lun) & 0x07)) 527 528 /* 529 * struct scsi_device::scsi_level values. For SCSI devices other than those 530 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1) 531 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level 532 * variable is visible to the user via sysfs. 533 */ 534 535 #define SCSI_UNKNOWN 0 536 #define SCSI_1 1 537 #define SCSI_1_CCS 2 538 #define SCSI_2 3 539 #define SCSI_3 4 /* SPC */ 540 #define SCSI_SPC_2 5 541 #define SCSI_SPC_3 6 542 543 /* 544 * INQ PERIPHERAL QUALIFIERS 545 */ 546 #define SCSI_INQ_PQ_CON 0x00 547 #define SCSI_INQ_PQ_NOT_CON 0x01 548 #define SCSI_INQ_PQ_NOT_CAP 0x03 549 550 551 /* 552 * Here are some scsi specific ioctl commands which are sometimes useful. 553 * 554 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 555 */ 556 557 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */ 558 #define SCSI_IOCTL_GET_IDLUN 0x5382 559 560 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */ 561 562 /* Used to obtain the host number of a device. */ 563 #define SCSI_IOCTL_PROBE_HOST 0x5385 564 565 /* Used to obtain the bus number for a device */ 566 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386 567 568 /* Used to obtain the PCI location of a device */ 569 #define SCSI_IOCTL_GET_PCI 0x5387 570 571 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */ 572 static inline __u32 scsi_to_u32(__u8 *ptr) 573 { 574 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3]; 575 } 576 577 #endif /* _SCSI_SCSI_H */ 578