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 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 /* 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 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 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 */ 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 } 278 279 /* 280 * Status codes. These are deprecated as they are shifted 1 bit right 281 * from those found in the SCSI standards. This causes confusion for 282 * applications that are ported to several OSes. Prefer SAM Status codes 283 * above. 284 */ 285 286 #define GOOD 0x00 287 #define CHECK_CONDITION 0x01 288 #define CONDITION_GOOD 0x02 289 #define BUSY 0x04 290 #define INTERMEDIATE_GOOD 0x08 291 #define INTERMEDIATE_C_GOOD 0x0a 292 #define RESERVATION_CONFLICT 0x0c 293 #define COMMAND_TERMINATED 0x11 294 #define QUEUE_FULL 0x14 295 #define ACA_ACTIVE 0x18 296 #define TASK_ABORTED 0x20 297 298 #define STATUS_MASK 0xfe 299 300 /* 301 * SENSE KEYS 302 */ 303 304 #define NO_SENSE 0x00 305 #define RECOVERED_ERROR 0x01 306 #define NOT_READY 0x02 307 #define MEDIUM_ERROR 0x03 308 #define HARDWARE_ERROR 0x04 309 #define ILLEGAL_REQUEST 0x05 310 #define UNIT_ATTENTION 0x06 311 #define DATA_PROTECT 0x07 312 #define BLANK_CHECK 0x08 313 #define COPY_ABORTED 0x0a 314 #define ABORTED_COMMAND 0x0b 315 #define VOLUME_OVERFLOW 0x0d 316 #define MISCOMPARE 0x0e 317 318 319 /* 320 * DEVICE TYPES 321 * Please keep them in 0x%02x format for $MODALIAS to work 322 */ 323 324 #define TYPE_DISK 0x00 325 #define TYPE_TAPE 0x01 326 #define TYPE_PRINTER 0x02 327 #define TYPE_PROCESSOR 0x03 /* HP scanners use this */ 328 #define TYPE_WORM 0x04 /* Treated as ROM by our system */ 329 #define TYPE_ROM 0x05 330 #define TYPE_SCANNER 0x06 331 #define TYPE_MOD 0x07 /* Magneto-optical disk - 332 * - treated as TYPE_DISK */ 333 #define TYPE_MEDIUM_CHANGER 0x08 334 #define TYPE_COMM 0x09 /* Communications device */ 335 #define TYPE_RAID 0x0c 336 #define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */ 337 #define TYPE_RBC 0x0e 338 #define TYPE_OSD 0x11 339 #define TYPE_ZBC 0x14 340 #define TYPE_WLUN 0x1e /* well-known logical unit */ 341 #define TYPE_NO_LUN 0x7f 342 343 /* SCSI protocols; these are taken from SPC-3 section 7.5 */ 344 enum scsi_protocol { 345 SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */ 346 SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */ 347 SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */ 348 SCSI_PROTOCOL_SBP = 3, /* firewire */ 349 SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */ 350 SCSI_PROTOCOL_ISCSI = 5, 351 SCSI_PROTOCOL_SAS = 6, 352 SCSI_PROTOCOL_ADT = 7, /* Media Changers */ 353 SCSI_PROTOCOL_ATA = 8, 354 SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */ 355 }; 356 357 /* Returns a human-readable name for the device */ 358 extern const char * scsi_device_type(unsigned type); 359 360 /* 361 * standard mode-select header prepended to all mode-select commands 362 */ 363 364 struct ccs_modesel_head { 365 __u8 _r1; /* reserved */ 366 __u8 medium; /* device-specific medium type */ 367 __u8 _r2; /* reserved */ 368 __u8 block_desc_length; /* block descriptor length */ 369 __u8 density; /* device-specific density code */ 370 __u8 number_blocks_hi; /* number of blocks in this block desc */ 371 __u8 number_blocks_med; 372 __u8 number_blocks_lo; 373 __u8 _r3; 374 __u8 block_length_hi; /* block length for blocks in this desc */ 375 __u8 block_length_med; 376 __u8 block_length_lo; 377 }; 378 379 /* 380 * ScsiLun: 8 byte LUN. 381 */ 382 struct scsi_lun { 383 __u8 scsi_lun[8]; 384 }; 385 386 /* 387 * The Well Known LUNS (SAM-3) in our int representation of a LUN 388 */ 389 #define SCSI_W_LUN_BASE 0xc100 390 #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1) 391 #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2) 392 #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3) 393 394 static inline int scsi_is_wlun(u64 lun) 395 { 396 return (lun & 0xff00) == SCSI_W_LUN_BASE; 397 } 398 399 400 /* 401 * MESSAGE CODES 402 */ 403 404 #define COMMAND_COMPLETE 0x00 405 #define EXTENDED_MESSAGE 0x01 406 #define EXTENDED_MODIFY_DATA_POINTER 0x00 407 #define EXTENDED_SDTR 0x01 408 #define EXTENDED_EXTENDED_IDENTIFY 0x02 /* SCSI-I only */ 409 #define EXTENDED_WDTR 0x03 410 #define EXTENDED_PPR 0x04 411 #define EXTENDED_MODIFY_BIDI_DATA_PTR 0x05 412 #define SAVE_POINTERS 0x02 413 #define RESTORE_POINTERS 0x03 414 #define DISCONNECT 0x04 415 #define INITIATOR_ERROR 0x05 416 #define ABORT_TASK_SET 0x06 417 #define MESSAGE_REJECT 0x07 418 #define NOP 0x08 419 #define MSG_PARITY_ERROR 0x09 420 #define LINKED_CMD_COMPLETE 0x0a 421 #define LINKED_FLG_CMD_COMPLETE 0x0b 422 #define TARGET_RESET 0x0c 423 #define ABORT_TASK 0x0d 424 #define CLEAR_TASK_SET 0x0e 425 #define INITIATE_RECOVERY 0x0f /* SCSI-II only */ 426 #define RELEASE_RECOVERY 0x10 /* SCSI-II only */ 427 #define CLEAR_ACA 0x16 428 #define LOGICAL_UNIT_RESET 0x17 429 #define SIMPLE_QUEUE_TAG 0x20 430 #define HEAD_OF_QUEUE_TAG 0x21 431 #define ORDERED_QUEUE_TAG 0x22 432 #define IGNORE_WIDE_RESIDUE 0x23 433 #define ACA 0x24 434 #define QAS_REQUEST 0x55 435 436 /* Old SCSI2 names, don't use in new code */ 437 #define BUS_DEVICE_RESET TARGET_RESET 438 #define ABORT ABORT_TASK_SET 439 440 /* 441 * Host byte codes 442 */ 443 444 #define DID_OK 0x00 /* NO error */ 445 #define DID_NO_CONNECT 0x01 /* Couldn't connect before timeout period */ 446 #define DID_BUS_BUSY 0x02 /* BUS stayed busy through time out period */ 447 #define DID_TIME_OUT 0x03 /* TIMED OUT for other reason */ 448 #define DID_BAD_TARGET 0x04 /* BAD target. */ 449 #define DID_ABORT 0x05 /* Told to abort for some other reason */ 450 #define DID_PARITY 0x06 /* Parity error */ 451 #define DID_ERROR 0x07 /* Internal error */ 452 #define DID_RESET 0x08 /* Reset by somebody. */ 453 #define DID_BAD_INTR 0x09 /* Got an interrupt we weren't expecting. */ 454 #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */ 455 #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */ 456 #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */ 457 #define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also 458 * without decrementing the retry count */ 459 #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution 460 * and the driver blocked the port to 461 * recover the link. Transport class will 462 * retry or fail IO */ 463 #define DID_TRANSPORT_FAILFAST 0x0f /* Transport class fastfailed the io */ 464 #define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on 465 * other paths */ 466 #define DID_NEXUS_FAILURE 0x11 /* Permanent nexus failure, retry on other 467 * paths might yield different results */ 468 #define DID_ALLOC_FAILURE 0x12 /* Space allocation on the device failed */ 469 #define DID_MEDIUM_ERROR 0x13 /* Medium error */ 470 #define DRIVER_OK 0x00 /* Driver status */ 471 472 /* 473 * These indicate the error that occurred, and what is available. 474 */ 475 476 #define DRIVER_BUSY 0x01 477 #define DRIVER_SOFT 0x02 478 #define DRIVER_MEDIA 0x03 479 #define DRIVER_ERROR 0x04 480 481 #define DRIVER_INVALID 0x05 482 #define DRIVER_TIMEOUT 0x06 483 #define DRIVER_HARD 0x07 484 #define DRIVER_SENSE 0x08 485 486 /* 487 * Internal return values. 488 */ 489 490 #define NEEDS_RETRY 0x2001 491 #define SUCCESS 0x2002 492 #define FAILED 0x2003 493 #define QUEUED 0x2004 494 #define SOFT_ERROR 0x2005 495 #define ADD_TO_MLQUEUE 0x2006 496 #define TIMEOUT_ERROR 0x2007 497 #define SCSI_RETURN_NOT_HANDLED 0x2008 498 #define FAST_IO_FAIL 0x2009 499 500 /* 501 * Midlevel queue return values. 502 */ 503 #define SCSI_MLQUEUE_HOST_BUSY 0x1055 504 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056 505 #define SCSI_MLQUEUE_EH_RETRY 0x1057 506 #define SCSI_MLQUEUE_TARGET_BUSY 0x1058 507 508 /* 509 * Use these to separate status msg and our bytes 510 * 511 * These are set by: 512 * 513 * status byte = set from target device 514 * msg_byte = return status from host adapter itself. 515 * host_byte = set by low-level driver to indicate status. 516 * driver_byte = set by mid-level. 517 */ 518 #define status_byte(result) (((result) >> 1) & 0x7f) 519 #define msg_byte(result) (((result) >> 8) & 0xff) 520 #define host_byte(result) (((result) >> 16) & 0xff) 521 #define driver_byte(result) (((result) >> 24) & 0xff) 522 523 #define sense_class(sense) (((sense) >> 4) & 0x7) 524 #define sense_error(sense) ((sense) & 0xf) 525 #define sense_valid(sense) ((sense) & 0x80) 526 527 /* 528 * default timeouts 529 */ 530 #define FORMAT_UNIT_TIMEOUT (2 * 60 * 60 * HZ) 531 #define START_STOP_TIMEOUT (60 * HZ) 532 #define MOVE_MEDIUM_TIMEOUT (5 * 60 * HZ) 533 #define READ_ELEMENT_STATUS_TIMEOUT (5 * 60 * HZ) 534 #define READ_DEFECT_DATA_TIMEOUT (60 * HZ ) 535 536 537 #define IDENTIFY_BASE 0x80 538 #define IDENTIFY(can_disconnect, lun) (IDENTIFY_BASE |\ 539 ((can_disconnect) ? 0x40 : 0) |\ 540 ((lun) & 0x07)) 541 542 /* 543 * struct scsi_device::scsi_level values. For SCSI devices other than those 544 * prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1) 545 * where "resp" is a byte array of the response to an INQUIRY. The scsi_level 546 * variable is visible to the user via sysfs. 547 */ 548 549 #define SCSI_UNKNOWN 0 550 #define SCSI_1 1 551 #define SCSI_1_CCS 2 552 #define SCSI_2 3 553 #define SCSI_3 4 /* SPC */ 554 #define SCSI_SPC_2 5 555 #define SCSI_SPC_3 6 556 557 /* 558 * INQ PERIPHERAL QUALIFIERS 559 */ 560 #define SCSI_INQ_PQ_CON 0x00 561 #define SCSI_INQ_PQ_NOT_CON 0x01 562 #define SCSI_INQ_PQ_NOT_CAP 0x03 563 564 565 /* 566 * Here are some scsi specific ioctl commands which are sometimes useful. 567 * 568 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 569 */ 570 571 /* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */ 572 #define SCSI_IOCTL_GET_IDLUN 0x5382 573 574 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */ 575 576 /* Used to obtain the host number of a device. */ 577 #define SCSI_IOCTL_PROBE_HOST 0x5385 578 579 /* Used to obtain the bus number for a device */ 580 #define SCSI_IOCTL_GET_BUS_NUMBER 0x5386 581 582 /* Used to obtain the PCI location of a device */ 583 #define SCSI_IOCTL_GET_PCI 0x5387 584 585 /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */ 586 static inline __u32 scsi_to_u32(__u8 *ptr) 587 { 588 return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3]; 589 } 590 591 #endif /* _SCSI_SCSI_H */ 592