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 15 struct scsi_cmnd; 16 17 enum 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 WRITE_12 0xaa 132 #define READ_MEDIA_SERIAL_NUMBER 0xab 133 #define WRITE_VERIFY_12 0xae 134 #define VERIFY_12 0xaf 135 #define SEARCH_HIGH_12 0xb0 136 #define SEARCH_EQUAL_12 0xb1 137 #define SEARCH_LOW_12 0xb2 138 #define SECURITY_PROTOCOL_OUT 0xb5 139 #define READ_ELEMENT_STATUS 0xb8 140 #define SEND_VOLUME_TAG 0xb6 141 #define WRITE_LONG_2 0xea 142 #define EXTENDED_COPY 0x83 143 #define RECEIVE_COPY_RESULTS 0x84 144 #define ACCESS_CONTROL_IN 0x86 145 #define ACCESS_CONTROL_OUT 0x87 146 #define READ_16 0x88 147 #define COMPARE_AND_WRITE 0x89 148 #define WRITE_16 0x8a 149 #define READ_ATTRIBUTE 0x8c 150 #define WRITE_ATTRIBUTE 0x8d 151 #define VERIFY_16 0x8f 152 #define SYNCHRONIZE_CACHE_16 0x91 153 #define WRITE_SAME_16 0x93 154 #define SERVICE_ACTION_IN 0x9e 155 /* values for service action in */ 156 #define SAI_READ_CAPACITY_16 0x10 157 #define SAI_GET_LBA_STATUS 0x12 158 #define SAI_REPORT_REFERRALS 0x13 159 /* values for VARIABLE_LENGTH_CMD service action codes 160 * see spc4r17 Section D.3.5, table D.7 and D.8 */ 161 #define VLC_SA_RECEIVE_CREDENTIAL 0x1800 162 /* values for maintenance in */ 163 #define MI_REPORT_IDENTIFYING_INFORMATION 0x05 164 #define MI_REPORT_TARGET_PGS 0x0a 165 #define MI_REPORT_ALIASES 0x0b 166 #define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c 167 #define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d 168 #define MI_REPORT_PRIORITY 0x0e 169 #define MI_REPORT_TIMESTAMP 0x0f 170 #define MI_MANAGEMENT_PROTOCOL_IN 0x10 171 /* value for MI_REPORT_TARGET_PGS ext header */ 172 #define MI_EXT_HDR_PARAM_FMT 0x20 173 /* values for maintenance out */ 174 #define MO_SET_IDENTIFYING_INFORMATION 0x06 175 #define MO_SET_TARGET_PGS 0x0a 176 #define MO_CHANGE_ALIASES 0x0b 177 #define MO_SET_PRIORITY 0x0e 178 #define MO_SET_TIMESTAMP 0x0f 179 #define MO_MANAGEMENT_PROTOCOL_OUT 0x10 180 /* values for variable length command */ 181 #define XDREAD_32 0x03 182 #define XDWRITE_32 0x04 183 #define XPWRITE_32 0x06 184 #define XDWRITEREAD_32 0x07 185 #define READ_32 0x09 186 #define VERIFY_32 0x0a 187 #define WRITE_32 0x0b 188 #define WRITE_SAME_32 0x0d 189 190 /* Values for T10/04-262r7 */ 191 #define ATA_16 0x85 /* 16-byte pass-thru */ 192 #define ATA_12 0xa1 /* 12-byte pass-thru */ 193 194 /* 195 * SCSI command lengths 196 */ 197 198 #define SCSI_MAX_VARLEN_CDB_SIZE 260 199 200 /* defined in T10 SCSI Primary Commands-2 (SPC2) */ 201 struct scsi_varlen_cdb_hdr { 202 __u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */ 203 __u8 control; 204 __u8 misc[5]; 205 __u8 additional_cdb_length; /* total cdb length - 8 */ 206 __be16 service_action; 207 /* service specific data follows */ 208 }; 209 210 static inline unsigned 211 scsi_varlen_cdb_length(const void *hdr) 212 { 213 return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8; 214 } 215 216 extern const unsigned char scsi_command_size_tbl[8]; 217 #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7] 218 219 static inline unsigned 220 scsi_command_size(const unsigned char *cmnd) 221 { 222 return (cmnd[0] == VARIABLE_LENGTH_CMD) ? 223 scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]); 224 } 225 226 #ifdef CONFIG_ACPI 227 struct acpi_bus_type; 228 229 extern int 230 scsi_register_acpi_bus_type(struct acpi_bus_type *bus); 231 232 extern void 233 scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus); 234 #endif 235 236 /* 237 * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft 238 * T10/1561-D Revision 4 Draft dated 7th November 2002. 239 */ 240 #define SAM_STAT_GOOD 0x00 241 #define SAM_STAT_CHECK_CONDITION 0x02 242 #define SAM_STAT_CONDITION_MET 0x04 243 #define SAM_STAT_BUSY 0x08 244 #define SAM_STAT_INTERMEDIATE 0x10 245 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14 246 #define SAM_STAT_RESERVATION_CONFLICT 0x18 247 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */ 248 #define SAM_STAT_TASK_SET_FULL 0x28 249 #define SAM_STAT_ACA_ACTIVE 0x30 250 #define SAM_STAT_TASK_ABORTED 0x40 251 252 /** scsi_status_is_good - check the status return. 253 * 254 * @status: the status passed up from the driver (including host and 255 * driver components) 256 * 257 * This returns true for known good conditions that may be treated as 258 * command completed normally 259 */ 260 static inline int scsi_status_is_good(int status) 261 { 262 /* 263 * FIXME: bit0 is listed as reserved in SCSI-2, but is 264 * significant in SCSI-3. For now, we follow the SCSI-2 265 * behaviour and ignore reserved bits. 266 */ 267 status &= 0xfe; 268 return ((status == SAM_STAT_GOOD) || 269 (status == SAM_STAT_INTERMEDIATE) || 270 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) || 271 /* FIXME: this is obsolete in SAM-3 */ 272 (status == SAM_STAT_COMMAND_TERMINATED)); 273 } 274 275 /* 276 * Status codes. These are deprecated as they are shifted 1 bit right 277 * from those found in the SCSI standards. This causes confusion for 278 * applications that are ported to several OSes. Prefer SAM Status codes 279 * above. 280 */ 281 282 #define GOOD 0x00 283 #define CHECK_CONDITION 0x01 284 #define CONDITION_GOOD 0x02 285 #define BUSY 0x04 286 #define INTERMEDIATE_GOOD 0x08 287 #define INTERMEDIATE_C_GOOD 0x0a 288 #define RESERVATION_CONFLICT 0x0c 289 #define COMMAND_TERMINATED 0x11 290 #define QUEUE_FULL 0x14 291 #define ACA_ACTIVE 0x18 292 #define TASK_ABORTED 0x20 293 294 #define STATUS_MASK 0xfe 295 296 /* 297 * SENSE KEYS 298 */ 299 300 #define NO_SENSE 0x00 301 #define RECOVERED_ERROR 0x01 302 #define NOT_READY 0x02 303 #define MEDIUM_ERROR 0x03 304 #define HARDWARE_ERROR 0x04 305 #define ILLEGAL_REQUEST 0x05 306 #define UNIT_ATTENTION 0x06 307 #define DATA_PROTECT 0x07 308 #define BLANK_CHECK 0x08 309 #define COPY_ABORTED 0x0a 310 #define ABORTED_COMMAND 0x0b 311 #define VOLUME_OVERFLOW 0x0d 312 #define MISCOMPARE 0x0e 313 314 315 /* 316 * DEVICE TYPES 317 * Please keep them in 0x%02x format for $MODALIAS to work 318 */ 319 320 #define TYPE_DISK 0x00 321 #define TYPE_TAPE 0x01 322 #define TYPE_PRINTER 0x02 323 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */ 324 #define TYPE_WORM 0x04 /* Treated as ROM by our system */ 325 #define TYPE_ROM 0x05 326 #define TYPE_SCANNER 0x06 327 #define TYPE_MOD 0x07 /* Magneto-optical disk - 328 * - treated as TYPE_DISK */ 329 #define TYPE_MEDIUM_CHANGER 0x08 330 #define TYPE_COMM 0x09 /* Communications device */ 331 #define TYPE_RAID 0x0c 332 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */ 333 #define TYPE_RBC 0x0e 334 #define TYPE_OSD 0x11 335 #define TYPE_ZBC 0x14 336 #define TYPE_WLUN 0x1e /* well-known logical unit */ 337 #define TYPE_NO_LUN 0x7f 338 339 /* SCSI protocols; these are taken from SPC-3 section 7.5 */ 340 enum scsi_protocol { 341 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */ 342 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */ 343 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */ 344 SCSI_PROTOCOL_SBP = 3, /* firewire */ 345 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */ 346 SCSI_PROTOCOL_ISCSI = 5, 347 SCSI_PROTOCOL_SAS = 6, 348 SCSI_PROTOCOL_ADT = 7, /* Media Changers */ 349 SCSI_PROTOCOL_ATA = 8, 350 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */ 351 }; 352 353 /* Returns a human-readable name for the device */ 354 extern const char * scsi_device_type(unsigned type); 355 356 /* 357 * standard mode-select header prepended to all mode-select commands 358 */ 359 360 struct ccs_modesel_head { 361 __u8 _r1; /* reserved */ 362 __u8 medium; /* device-specific medium type */ 363 __u8 _r2; /* reserved */ 364 __u8 block_desc_length; /* block descriptor length */ 365 __u8 density; /* device-specific density code */ 366 __u8 number_blocks_hi; /* number of blocks in this block desc */ 367 __u8 number_blocks_med; 368 __u8 number_blocks_lo; 369 __u8 _r3; 370 __u8 block_length_hi; /* block length for blocks in this desc */ 371 __u8 block_length_med; 372 __u8 block_length_lo; 373 }; 374 375 /* 376 * ScsiLun: 8 byte LUN. 377 */ 378 struct scsi_lun { 379 __u8 scsi_lun[8]; 380 }; 381 382 /* 383 * The Well Known LUNS (SAM-3) in our int representation of a LUN 384 */ 385 #define SCSI_W_LUN_BASE 0xc100 386 #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1) 387 #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2) 388 #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3) 389 390 static inline int scsi_is_wlun(u64 lun) 391 { 392 return (lun & 0xff00) == SCSI_W_LUN_BASE; 393 } 394 395 396 /* 397 * MESSAGE CODES 398 */ 399 400 #define COMMAND_COMPLETE 0x00 401 #define EXTENDED_MESSAGE 0x01 402 #define EXTENDED_MODIFY_DATA_POINTER 0x00 403 #define EXTENDED_SDTR 0x01 404 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */ 405 #define EXTENDED_WDTR 0x03 406 #define EXTENDED_PPR 0x04 407 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05 408 #define SAVE_POINTERS 0x02 409 #define RESTORE_POINTERS 0x03 410 #define DISCONNECT 0x04 411 #define INITIATOR_ERROR 0x05 412 #define ABORT_TASK_SET 0x06 413 #define MESSAGE_REJECT 0x07 414 #define NOP 0x08 415 #define MSG_PARITY_ERROR 0x09 416 #define LINKED_CMD_COMPLETE 0x0a 417 #define LINKED_FLG_CMD_COMPLETE 0x0b 418 #define TARGET_RESET 0x0c 419 #define ABORT_TASK 0x0d 420 #define CLEAR_TASK_SET 0x0e 421 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */ 422 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */ 423 #define CLEAR_ACA 0x16 424 #define LOGICAL_UNIT_RESET 0x17 425 #define SIMPLE_QUEUE_TAG 0x20 426 #define HEAD_OF_QUEUE_TAG 0x21 427 #define ORDERED_QUEUE_TAG 0x22 428 #define IGNORE_WIDE_RESIDUE 0x23 429 #define ACA 0x24 430 #define QAS_REQUEST 0x55 431 432 /* Old SCSI2 names, don't use in new code */ 433 #define BUS_DEVICE_RESET TARGET_RESET 434 #define ABORT ABORT_TASK_SET 435 436 /* 437 * Host byte codes 438 */ 439 440 #define DID_OK 0x00 /* NO error */ 441 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */ 442 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */ 443 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */ 444 #define DID_BAD_TARGET 0x04 /* BAD target. */ 445 #define DID_ABORT 0x05 /* Told to abort for some other reason */ 446 #define DID_PARITY 0x06 /* Parity error */ 447 #define DID_ERROR 0x07 /* Internal error */ 448 #define DID_RESET 0x08 /* Reset by somebody. */ 449 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */ 450 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */ 451 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */ 452 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */ 453 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also 454 * without decrementing the retry count */ 455 #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution 456 * and the driver blocked the port to 457 * recover the link. Transport class will 458 * retry or fail IO */ 459 #define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */ 460 #define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on 461 * other paths */ 462 #define DID_NEXUS_FAILURE 0x11 /* Permanent nexus failure, retry on other 463 * paths might yield different results */ 464 #define DID_ALLOC_FAILURE 0x12 /* Space allocation on the device failed */ 465 #define DID_MEDIUM_ERROR 0x13 /* Medium error */ 466 #define DRIVER_OK 0x00 /* Driver status */ 467 468 /* 469 * These indicate the error that occurred, and what is available. 470 */ 471 472 #define DRIVER_BUSY 0x01 473 #define DRIVER_SOFT 0x02 474 #define DRIVER_MEDIA 0x03 475 #define DRIVER_ERROR 0x04 476 477 #define DRIVER_INVALID 0x05 478 #define DRIVER_TIMEOUT 0x06 479 #define DRIVER_HARD 0x07 480 #define DRIVER_SENSE 0x08 481 482 /* 483 * Internal return values. 484 */ 485 486 #define NEEDS_RETRY 0x2001 487 #define SUCCESS 0x2002 488 #define FAILED 0x2003 489 #define QUEUED 0x2004 490 #define SOFT_ERROR 0x2005 491 #define ADD_TO_MLQUEUE 0x2006 492 #define TIMEOUT_ERROR 0x2007 493 #define SCSI_RETURN_NOT_HANDLED 0x2008 494 #define FAST_IO_FAIL 0x2009 495 496 /* 497 * Midlevel queue return values. 498 */ 499 #define SCSI_MLQUEUE_HOST_BUSY 0x1055 500 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056 501 #define SCSI_MLQUEUE_EH_RETRY 0x1057 502 #define SCSI_MLQUEUE_TARGET_BUSY 0x1058 503 504 /* 505 * Use these to separate status msg and our bytes 506 * 507 * These are set by: 508 * 509 * status byte = set from target device 510 * msg_byte = return status from host adapter itself. 511 * host_byte = set by low-level driver to indicate status. 512 * driver_byte = set by mid-level. 513 */ 514 #define status_byte(result) (((result) >> 1) & 0x7f) 515 #define msg_byte(result) (((result) >> 8) & 0xff) 516 #define host_byte(result) (((result) >> 16) & 0xff) 517 #define driver_byte(result) (((result) >> 24) & 0xff) 518 519 #define sense_class(sense) (((sense) >> 4) & 0x7) 520 #define sense_error(sense) ((sense) & 0xf) 521 #define sense_valid(sense) ((sense) & 0x80) 522 523 /* 524 * default timeouts 525 */ 526 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ) 527 #define START_STOP_TIMEOUT (60 * HZ) 528 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ) 529 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ) 530 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ ) 531 532 533 #define IDENTIFY_BASE 0x80 534 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\ 535 ((can_disconnect) ? 0x40 : 0) |\ 536 ((lun) & 0x07)) 537 538 /* 539 * struct scsi_device::scsi_level values. For SCSI devices other than those 540 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1) 541 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level 542 * variable is visible to the user via sysfs. 543 */ 544 545 #define SCSI_UNKNOWN 0 546 #define SCSI_1 1 547 #define SCSI_1_CCS 2 548 #define SCSI_2 3 549 #define SCSI_3 4 /* SPC */ 550 #define SCSI_SPC_2 5 551 #define SCSI_SPC_3 6 552 553 /* 554 * INQ PERIPHERAL QUALIFIERS 555 */ 556 #define SCSI_INQ_PQ_CON 0x00 557 #define SCSI_INQ_PQ_NOT_CON 0x01 558 #define SCSI_INQ_PQ_NOT_CAP 0x03 559 560 561 /* 562 * Here are some scsi specific ioctl commands which are sometimes useful. 563 * 564 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 565 */ 566 567 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */ 568 #define SCSI_IOCTL_GET_IDLUN 0x5382 569 570 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */ 571 572 /* Used to obtain the host number of a device. */ 573 #define SCSI_IOCTL_PROBE_HOST 0x5385 574 575 /* Used to obtain the bus number for a device */ 576 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386 577 578 /* Used to obtain the PCI location of a device */ 579 #define SCSI_IOCTL_GET_PCI 0x5387 580 581 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */ 582 static inline __u32 scsi_to_u32(__u8 *ptr) 583 { 584 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3]; 585 } 586 587 #endif /* _SCSI_SCSI_H */ 588
