1 #ifndef _SCSI_SCSI_DEVICE_H 2 #define _SCSI_SCSI_DEVICE_H 3 4 #include <linux/list.h> 5 #include <linux/spinlock.h> 6 #include <linux/workqueue.h> 7 #include <linux/blkdev.h> 8 #include <scsi/scsi.h> 9 #include <linux/atomic.h> 10 11 struct device; 12 struct request_queue; 13 struct scsi_cmnd; 14 struct scsi_lun; 15 struct scsi_sense_hdr; 16 17 struct scsi_mode_data { 18 __u32 length; 19 __u16 block_descriptor_length; 20 __u8 medium_type; 21 __u8 device_specific; 22 __u8 header_length; 23 __u8 longlba:1; 24 }; 25 26 /* 27 * sdev state: If you alter this, you also need to alter scsi_sysfs.c 28 * (for the ascii descriptions) and the state model enforcer: 29 * scsi_lib:scsi_device_set_state(). 30 */ 31 enum scsi_device_state { 32 SDEV_CREATED = 1, /* device created but not added to sysfs 33 * Only internal commands allowed (for inq) */ 34 SDEV_RUNNING, /* device properly configured 35 * All commands allowed */ 36 SDEV_CANCEL, /* beginning to delete device 37 * Only error handler commands allowed */ 38 SDEV_DEL, /* device deleted 39 * no commands allowed */ 40 SDEV_QUIESCE, /* Device quiescent. No block commands 41 * will be accepted, only specials (which 42 * originate in the mid-layer) */ 43 SDEV_OFFLINE, /* Device offlined (by error handling or 44 * user request */ 45 SDEV_TRANSPORT_OFFLINE, /* Offlined by transport class error handler */ 46 SDEV_BLOCK, /* Device blocked by scsi lld. No 47 * scsi commands from user or midlayer 48 * should be issued to the scsi 49 * lld. */ 50 SDEV_CREATED_BLOCK, /* same as above but for created devices */ 51 }; 52 53 enum scsi_device_event { 54 SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */ 55 SDEV_EVT_INQUIRY_CHANGE_REPORTED, /* 3F 03 UA reported */ 56 SDEV_EVT_CAPACITY_CHANGE_REPORTED, /* 2A 09 UA reported */ 57 SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED, /* 38 07 UA reported */ 58 SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED, /* 2A 01 UA reported */ 59 SDEV_EVT_LUN_CHANGE_REPORTED, /* 3F 0E UA reported */ 60 61 SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE, 62 SDEV_EVT_LAST = SDEV_EVT_LUN_CHANGE_REPORTED, 63 64 SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1 65 }; 66 67 struct scsi_event { 68 enum scsi_device_event evt_type; 69 struct list_head node; 70 71 /* put union of data structures, for non-simple event types, 72 * here 73 */ 74 }; 75 76 struct scsi_device { 77 struct Scsi_Host *host; 78 struct request_queue *request_queue; 79 80 /* the next two are protected by the host->host_lock */ 81 struct list_head siblings; /* list of all devices on this host */ 82 struct list_head same_target_siblings; /* just the devices sharing same target id */ 83 84 /* this is now protected by the request_queue->queue_lock */ 85 unsigned int device_busy; /* commands actually active on 86 * low-level. protected by queue_lock. */ 87 spinlock_t list_lock; 88 struct list_head cmd_list; /* queue of in use SCSI Command structures */ 89 struct list_head starved_entry; 90 struct scsi_cmnd *current_cmnd; /* currently active command */ 91 unsigned short queue_depth; /* How deep of a queue we want */ 92 unsigned short max_queue_depth; /* max queue depth */ 93 unsigned short last_queue_full_depth; /* These two are used by */ 94 unsigned short last_queue_full_count; /* scsi_track_queue_full() */ 95 unsigned long last_queue_full_time; /* last queue full time */ 96 unsigned long queue_ramp_up_period; /* ramp up period in jiffies */ 97 #define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ) 98 99 unsigned long last_queue_ramp_up; /* last queue ramp up time */ 100 101 unsigned int id, lun, channel; 102 103 unsigned int manufacturer; /* Manufacturer of device, for using 104 * vendor-specific cmd's */ 105 unsigned sector_size; /* size in bytes */ 106 107 void *hostdata; /* available to low-level driver */ 108 char type; 109 char scsi_level; 110 char inq_periph_qual; /* PQ from INQUIRY data */ 111 unsigned char inquiry_len; /* valid bytes in 'inquiry' */ 112 unsigned char * inquiry; /* INQUIRY response data */ 113 const char * vendor; /* [back_compat] point into 'inquiry' ... */ 114 const char * model; /* ... after scan; point to static string */ 115 const char * rev; /* ... "nullnullnullnull" before scan */ 116 117 #define SCSI_VPD_PG_LEN 255 118 int vpd_pg83_len; 119 unsigned char *vpd_pg83; 120 int vpd_pg80_len; 121 unsigned char *vpd_pg80; 122 unsigned char current_tag; /* current tag */ 123 struct scsi_target *sdev_target; /* used only for single_lun */ 124 125 unsigned int sdev_bflags; /* black/white flags as also found in 126 * scsi_devinfo.[hc]. For now used only to 127 * pass settings from slave_alloc to scsi 128 * core. */ 129 unsigned int eh_timeout; /* Error handling timeout */ 130 unsigned writeable:1; 131 unsigned removable:1; 132 unsigned changed:1; /* Data invalid due to media change */ 133 unsigned busy:1; /* Used to prevent races */ 134 unsigned lockable:1; /* Able to prevent media removal */ 135 unsigned locked:1; /* Media removal disabled */ 136 unsigned borken:1; /* Tell the Seagate driver to be 137 * painfully slow on this device */ 138 unsigned disconnect:1; /* can disconnect */ 139 unsigned soft_reset:1; /* Uses soft reset option */ 140 unsigned sdtr:1; /* Device supports SDTR messages */ 141 unsigned wdtr:1; /* Device supports WDTR messages */ 142 unsigned ppr:1; /* Device supports PPR messages */ 143 unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ 144 unsigned simple_tags:1; /* simple queue tag messages are enabled */ 145 unsigned ordered_tags:1;/* ordered queue tag messages are enabled */ 146 unsigned was_reset:1; /* There was a bus reset on the bus for 147 * this device */ 148 unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN 149 * because we did a bus reset. */ 150 unsigned use_10_for_rw:1; /* first try 10-byte read / write */ 151 unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ 152 unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */ 153 unsigned no_write_same:1; /* no WRITE SAME command */ 154 unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */ 155 unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */ 156 unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */ 157 unsigned skip_vpd_pages:1; /* do not read VPD pages */ 158 unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ 159 unsigned no_start_on_add:1; /* do not issue start on add */ 160 unsigned allow_restart:1; /* issue START_UNIT in error handler */ 161 unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */ 162 unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ 163 unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ 164 unsigned select_no_atn:1; 165 unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ 166 unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ 167 unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ 168 unsigned last_sector_bug:1; /* do not use multisector accesses on 169 SD_LAST_BUGGY_SECTORS */ 170 unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */ 171 unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */ 172 unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */ 173 unsigned is_visible:1; /* is the device visible in sysfs */ 174 unsigned wce_default_on:1; /* Cache is ON by default */ 175 unsigned no_dif:1; /* T10 PI (DIF) should be disabled */ 176 177 atomic_t disk_events_disable_depth; /* disable depth for disk events */ 178 179 DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ 180 DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */ 181 struct list_head event_list; /* asserted events */ 182 struct work_struct event_work; 183 184 unsigned int device_blocked; /* Device returned QUEUE_FULL. */ 185 186 unsigned int max_device_blocked; /* what device_blocked counts down from */ 187 #define SCSI_DEFAULT_DEVICE_BLOCKED 3 188 189 atomic_t iorequest_cnt; 190 atomic_t iodone_cnt; 191 atomic_t ioerr_cnt; 192 193 struct device sdev_gendev, 194 sdev_dev; 195 196 struct execute_work ew; /* used to get process context on put */ 197 struct work_struct requeue_work; 198 199 struct scsi_dh_data *scsi_dh_data; 200 enum scsi_device_state sdev_state; 201 unsigned long sdev_data[0]; 202 } __attribute__((aligned(sizeof(unsigned long)))); 203 204 struct scsi_dh_devlist { 205 char *vendor; 206 char *model; 207 }; 208 209 typedef void (*activate_complete)(void *, int); 210 struct scsi_device_handler { 211 /* Used by the infrastructure */ 212 struct list_head list; /* list of scsi_device_handlers */ 213 214 /* Filled by the hardware handler */ 215 struct module *module; 216 const char *name; 217 const struct scsi_dh_devlist *devlist; 218 int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *); 219 int (*attach)(struct scsi_device *); 220 void (*detach)(struct scsi_device *); 221 int (*activate)(struct scsi_device *, activate_complete, void *); 222 int (*prep_fn)(struct scsi_device *, struct request *); 223 int (*set_params)(struct scsi_device *, const char *); 224 bool (*match)(struct scsi_device *); 225 }; 226 227 struct scsi_dh_data { 228 struct scsi_device_handler *scsi_dh; 229 struct scsi_device *sdev; 230 struct kref kref; 231 char buf[0]; 232 }; 233 234 #define to_scsi_device(d) \ 235 container_of(d, struct scsi_device, sdev_gendev) 236 #define class_to_sdev(d) \ 237 container_of(d, struct scsi_device, sdev_dev) 238 #define transport_class_to_sdev(class_dev) \ 239 to_scsi_device(class_dev->parent) 240 241 #define sdev_printk(prefix, sdev, fmt, a...) \ 242 dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a) 243 244 #define sdev_dbg(sdev, fmt, a...) \ 245 dev_dbg(&(sdev)->sdev_gendev, fmt, ##a) 246 247 #define scmd_printk(prefix, scmd, fmt, a...) \ 248 (scmd)->request->rq_disk ? \ 249 sdev_printk(prefix, (scmd)->device, "[%s] " fmt, \ 250 (scmd)->request->rq_disk->disk_name, ##a) : \ 251 sdev_printk(prefix, (scmd)->device, fmt, ##a) 252 253 #define scmd_dbg(scmd, fmt, a...) \ 254 do { \ 255 if ((scmd)->request->rq_disk) \ 256 sdev_dbg((scmd)->device, "[%s] " fmt, \ 257 (scmd)->request->rq_disk->disk_name, ##a);\ 258 else \ 259 sdev_dbg((scmd)->device, fmt, ##a); \ 260 } while (0) 261 262 enum scsi_target_state { 263 STARGET_CREATED = 1, 264 STARGET_RUNNING, 265 STARGET_DEL, 266 }; 267 268 /* 269 * scsi_target: representation of a scsi target, for now, this is only 270 * used for single_lun devices. If no one has active IO to the target, 271 * starget_sdev_user is NULL, else it points to the active sdev. 272 */ 273 struct scsi_target { 274 struct scsi_device *starget_sdev_user; 275 struct list_head siblings; 276 struct list_head devices; 277 struct device dev; 278 struct kref reap_ref; /* last put renders target invisible */ 279 unsigned int channel; 280 unsigned int id; /* target id ... replace 281 * scsi_device.id eventually */ 282 unsigned int create:1; /* signal that it needs to be added */ 283 unsigned int single_lun:1; /* Indicates we should only 284 * allow I/O to one of the luns 285 * for the device at a time. */ 286 unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f 287 * means no lun present. */ 288 unsigned int no_report_luns:1; /* Don't use 289 * REPORT LUNS for scanning. */ 290 unsigned int expecting_lun_change:1; /* A device has reported 291 * a 3F/0E UA, other devices on 292 * the same target will also. */ 293 /* commands actually active on LLD. protected by host lock. */ 294 unsigned int target_busy; 295 /* 296 * LLDs should set this in the slave_alloc host template callout. 297 * If set to zero then there is not limit. 298 */ 299 unsigned int can_queue; 300 unsigned int target_blocked; 301 unsigned int max_target_blocked; 302 #define SCSI_DEFAULT_TARGET_BLOCKED 3 303 304 char scsi_level; 305 enum scsi_target_state state; 306 void *hostdata; /* available to low-level driver */ 307 unsigned long starget_data[0]; /* for the transport */ 308 /* starget_data must be the last element!!!! */ 309 } __attribute__((aligned(sizeof(unsigned long)))); 310 311 #define to_scsi_target(d) container_of(d, struct scsi_target, dev) 312 static inline struct scsi_target *scsi_target(struct scsi_device *sdev) 313 { 314 return to_scsi_target(sdev->sdev_gendev.parent); 315 } 316 #define transport_class_to_starget(class_dev) \ 317 to_scsi_target(class_dev->parent) 318 319 #define starget_printk(prefix, starget, fmt, a...) \ 320 dev_printk(prefix, &(starget)->dev, fmt, ##a) 321 322 extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, 323 uint, uint, uint, void *hostdata); 324 extern int scsi_add_device(struct Scsi_Host *host, uint channel, 325 uint target, uint lun); 326 extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); 327 extern void scsi_remove_device(struct scsi_device *); 328 extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); 329 void scsi_attach_vpd(struct scsi_device *sdev); 330 331 extern int scsi_device_get(struct scsi_device *); 332 extern void scsi_device_put(struct scsi_device *); 333 extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, 334 uint, uint, uint); 335 extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, 336 uint, uint, uint); 337 extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, 338 uint); 339 extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, 340 uint); 341 extern void starget_for_each_device(struct scsi_target *, void *, 342 void (*fn)(struct scsi_device *, void *)); 343 extern void __starget_for_each_device(struct scsi_target *, void *, 344 void (*fn)(struct scsi_device *, 345 void *)); 346 347 /* only exposed to implement shost_for_each_device */ 348 extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, 349 struct scsi_device *); 350 351 /** 352 * shost_for_each_device - iterate over all devices of a host 353 * @sdev: the &struct scsi_device to use as a cursor 354 * @shost: the &struct scsi_host to iterate over 355 * 356 * Iterator that returns each device attached to @shost. This loop 357 * takes a reference on each device and releases it at the end. If 358 * you break out of the loop, you must call scsi_device_put(sdev). 359 */ 360 #define shost_for_each_device(sdev, shost) \ 361 for ((sdev) = __scsi_iterate_devices((shost), NULL); \ 362 (sdev); \ 363 (sdev) = __scsi_iterate_devices((shost), (sdev))) 364 365 /** 366 * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) 367 * @sdev: the &struct scsi_device to use as a cursor 368 * @shost: the &struct scsi_host to iterate over 369 * 370 * Iterator that returns each device attached to @shost. It does _not_ 371 * take a reference on the scsi_device, so the whole loop must be 372 * protected by shost->host_lock. 373 * 374 * Note: The only reason to use this is because you need to access the 375 * device list in interrupt context. Otherwise you really want to use 376 * shost_for_each_device instead. 377 */ 378 #define __shost_for_each_device(sdev, shost) \ 379 list_for_each_entry((sdev), &((shost)->__devices), siblings) 380 381 extern void scsi_adjust_queue_depth(struct scsi_device *, int, int); 382 extern int scsi_track_queue_full(struct scsi_device *, int); 383 384 extern int scsi_set_medium_removal(struct scsi_device *, char); 385 386 extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, 387 unsigned char *buffer, int len, int timeout, 388 int retries, struct scsi_mode_data *data, 389 struct scsi_sense_hdr *); 390 extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, 391 int modepage, unsigned char *buffer, int len, 392 int timeout, int retries, 393 struct scsi_mode_data *data, 394 struct scsi_sense_hdr *); 395 extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, 396 int retries, struct scsi_sense_hdr *sshdr); 397 extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, 398 int buf_len); 399 extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer, 400 unsigned int len, unsigned char opcode); 401 extern int scsi_device_set_state(struct scsi_device *sdev, 402 enum scsi_device_state state); 403 extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, 404 gfp_t gfpflags); 405 extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); 406 extern void sdev_evt_send_simple(struct scsi_device *sdev, 407 enum scsi_device_event evt_type, gfp_t gfpflags); 408 extern int scsi_device_quiesce(struct scsi_device *sdev); 409 extern void scsi_device_resume(struct scsi_device *sdev); 410 extern void scsi_target_quiesce(struct scsi_target *); 411 extern void scsi_target_resume(struct scsi_target *); 412 extern void scsi_scan_target(struct device *parent, unsigned int channel, 413 unsigned int id, unsigned int lun, int rescan); 414 extern void scsi_target_reap(struct scsi_target *); 415 extern void scsi_target_block(struct device *); 416 extern void scsi_target_unblock(struct device *, enum scsi_device_state); 417 extern void scsi_remove_target(struct device *); 418 extern void int_to_scsilun(unsigned int, struct scsi_lun *); 419 extern int scsilun_to_int(struct scsi_lun *); 420 extern const char *scsi_device_state_name(enum scsi_device_state); 421 extern int scsi_is_sdev_device(const struct device *); 422 extern int scsi_is_target_device(const struct device *); 423 extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, 424 int data_direction, void *buffer, unsigned bufflen, 425 unsigned char *sense, int timeout, int retries, 426 u64 flags, int *resid); 427 extern int scsi_execute_req_flags(struct scsi_device *sdev, 428 const unsigned char *cmd, int data_direction, void *buffer, 429 unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, 430 int retries, int *resid, u64 flags); 431 static inline int scsi_execute_req(struct scsi_device *sdev, 432 const unsigned char *cmd, int data_direction, void *buffer, 433 unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, 434 int retries, int *resid) 435 { 436 return scsi_execute_req_flags(sdev, cmd, data_direction, buffer, 437 bufflen, sshdr, timeout, retries, resid, 0); 438 } 439 extern void sdev_disable_disk_events(struct scsi_device *sdev); 440 extern void sdev_enable_disk_events(struct scsi_device *sdev); 441 442 #ifdef CONFIG_PM_RUNTIME 443 extern int scsi_autopm_get_device(struct scsi_device *); 444 extern void scsi_autopm_put_device(struct scsi_device *); 445 #else 446 static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; } 447 static inline void scsi_autopm_put_device(struct scsi_device *d) {} 448 #endif /* CONFIG_PM_RUNTIME */ 449 450 static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) 451 { 452 return device_reprobe(&sdev->sdev_gendev); 453 } 454 455 static inline unsigned int sdev_channel(struct scsi_device *sdev) 456 { 457 return sdev->channel; 458 } 459 460 static inline unsigned int sdev_id(struct scsi_device *sdev) 461 { 462 return sdev->id; 463 } 464 465 #define scmd_id(scmd) sdev_id((scmd)->device) 466 #define scmd_channel(scmd) sdev_channel((scmd)->device) 467 468 /* 469 * checks for positions of the SCSI state machine 470 */ 471 static inline int scsi_device_online(struct scsi_device *sdev) 472 { 473 return (sdev->sdev_state != SDEV_OFFLINE && 474 sdev->sdev_state != SDEV_TRANSPORT_OFFLINE && 475 sdev->sdev_state != SDEV_DEL); 476 } 477 static inline int scsi_device_blocked(struct scsi_device *sdev) 478 { 479 return sdev->sdev_state == SDEV_BLOCK || 480 sdev->sdev_state == SDEV_CREATED_BLOCK; 481 } 482 static inline int scsi_device_created(struct scsi_device *sdev) 483 { 484 return sdev->sdev_state == SDEV_CREATED || 485 sdev->sdev_state == SDEV_CREATED_BLOCK; 486 } 487 488 /* accessor functions for the SCSI parameters */ 489 static inline int scsi_device_sync(struct scsi_device *sdev) 490 { 491 return sdev->sdtr; 492 } 493 static inline int scsi_device_wide(struct scsi_device *sdev) 494 { 495 return sdev->wdtr; 496 } 497 static inline int scsi_device_dt(struct scsi_device *sdev) 498 { 499 return sdev->ppr; 500 } 501 static inline int scsi_device_dt_only(struct scsi_device *sdev) 502 { 503 if (sdev->inquiry_len < 57) 504 return 0; 505 return (sdev->inquiry[56] & 0x0c) == 0x04; 506 } 507 static inline int scsi_device_ius(struct scsi_device *sdev) 508 { 509 if (sdev->inquiry_len < 57) 510 return 0; 511 return sdev->inquiry[56] & 0x01; 512 } 513 static inline int scsi_device_qas(struct scsi_device *sdev) 514 { 515 if (sdev->inquiry_len < 57) 516 return 0; 517 return sdev->inquiry[56] & 0x02; 518 } 519 static inline int scsi_device_enclosure(struct scsi_device *sdev) 520 { 521 return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; 522 } 523 524 static inline int scsi_device_protection(struct scsi_device *sdev) 525 { 526 if (sdev->no_dif) 527 return 0; 528 529 return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); 530 } 531 532 static inline int scsi_device_tpgs(struct scsi_device *sdev) 533 { 534 return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; 535 } 536 537 #define MODULE_ALIAS_SCSI_DEVICE(type) \ 538 MODULE_ALIAS("scsi:t-" __stringify(type) "*") 539 #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" 540 541 #endif /* _SCSI_SCSI_DEVICE_H */ 542