LXR linux/include/scsi/scsi

   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
  11struct device;
  12struct request_queue;
  13struct scsi_cmnd;
  14struct scsi_lun;
  15struct scsi_sense_hdr;
  16
  17struct 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 */
  31enum 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
  53enum 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
  67struct 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
  76struct 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        unsigned char current_tag;      /* current tag */
 117        struct scsi_target      *sdev_target;   /* used only for single_lun */
 118
 119        unsigned int    sdev_bflags; /* black/white flags as also found in
 120                                 * scsi_devinfo.[hc]. For now used only to
 121                                 * pass settings from slave_alloc to scsi
 122                                 * core. */
 123        unsigned int eh_timeout; /* Error handling timeout */
 124        unsigned writeable:1;
 125        unsigned removable:1;
 126        unsigned changed:1;     /* Data invalid due to media change */
 127        unsigned busy:1;        /* Used to prevent races */
 128        unsigned lockable:1;    /* Able to prevent media removal */
 129        unsigned locked:1;      /* Media removal disabled */
 130        unsigned borken:1;      /* Tell the Seagate driver to be 
 131                                 * painfully slow on this device */
 132        unsigned disconnect:1;  /* can disconnect */
 133        unsigned soft_reset:1;  /* Uses soft reset option */
 134        unsigned sdtr:1;        /* Device supports SDTR messages */
 135        unsigned wdtr:1;        /* Device supports WDTR messages */
 136        unsigned ppr:1;         /* Device supports PPR messages */
 137        unsigned tagged_supported:1;    /* Supports SCSI-II tagged queuing */
 138        unsigned simple_tags:1; /* simple queue tag messages are enabled */
 139        unsigned ordered_tags:1;/* ordered queue tag messages are enabled */
 140        unsigned was_reset:1;   /* There was a bus reset on the bus for 
 141                                 * this device */
 142        unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN
 143                                     * because we did a bus reset. */
 144        unsigned use_10_for_rw:1; /* first try 10-byte read / write */
 145        unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
 146        unsigned no_report_opcodes:1;   /* no REPORT SUPPORTED OPERATION CODES */
 147        unsigned no_write_same:1;       /* no WRITE SAME command */
 148        unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */
 149        unsigned skip_ms_page_8:1;      /* do not use MODE SENSE page 0x08 */
 150        unsigned skip_ms_page_3f:1;     /* do not use MODE SENSE page 0x3f */
 151        unsigned skip_vpd_pages:1;      /* do not read VPD pages */
 152        unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
 153        unsigned no_start_on_add:1;     /* do not issue start on add */
 154        unsigned allow_restart:1; /* issue START_UNIT in error handler */
 155        unsigned manage_start_stop:1;   /* Let HLD (sd) manage start/stop */
 156        unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */
 157        unsigned no_uld_attach:1; /* disable connecting to upper level drivers */
 158        unsigned select_no_atn:1;
 159        unsigned fix_capacity:1;        /* READ_CAPACITY is too high by 1 */
 160        unsigned guess_capacity:1;      /* READ_CAPACITY might be too high by 1 */
 161        unsigned retry_hwerror:1;       /* Retry HARDWARE_ERROR */
 162        unsigned last_sector_bug:1;     /* do not use multisector accesses on
 163                                           SD_LAST_BUGGY_SECTORS */
 164        unsigned no_read_disc_info:1;   /* Avoid READ_DISC_INFO cmds */
 165        unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */
 166        unsigned try_rc_10_first:1;     /* Try READ_CAPACACITY_10 first */
 167        unsigned is_visible:1;  /* is the device visible in sysfs */
 168        unsigned wce_default_on:1;      /* Cache is ON by default */
 169        unsigned no_dif:1;      /* T10 PI (DIF) should be disabled */
 170
 171        atomic_t disk_events_disable_depth; /* disable depth for disk events */
 172
 173        DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
 174        DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */
 175        struct list_head event_list;    /* asserted events */
 176        struct work_struct event_work;
 177
 178        unsigned int device_blocked;    /* Device returned QUEUE_FULL. */
 179
 180        unsigned int max_device_blocked; /* what device_blocked counts down from  */
 181#define SCSI_DEFAULT_DEVICE_BLOCKED     3
 182
 183        atomic_t iorequest_cnt;
 184        atomic_t iodone_cnt;
 185        atomic_t ioerr_cnt;
 186
 187        struct device           sdev_gendev,
 188                                sdev_dev;
 189
 190        struct execute_work     ew; /* used to get process context on put */
 191        struct work_struct      requeue_work;
 192
 193        struct scsi_dh_data     *scsi_dh_data;
 194        enum scsi_device_state sdev_state;
 195        unsigned long           sdev_data[0];
 196} __attribute__((aligned(sizeof(unsigned long))));
 197
 198struct scsi_dh_devlist {
 199        char *vendor;
 200        char *model;
 201};
 202
 203typedef void (*activate_complete)(void *, int);
 204struct scsi_device_handler {
 205        /* Used by the infrastructure */
 206        struct list_head list; /* list of scsi_device_handlers */
 207
 208        /* Filled by the hardware handler */
 209        struct module *module;
 210        const char *name;
 211        const struct scsi_dh_devlist *devlist;
 212        int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
 213        int (*attach)(struct scsi_device *);
 214        void (*detach)(struct scsi_device *);
 215        int (*activate)(struct scsi_device *, activate_complete, void *);
 216        int (*prep_fn)(struct scsi_device *, struct request *);
 217        int (*set_params)(struct scsi_device *, const char *);
 218        bool (*match)(struct scsi_device *);
 219};
 220
 221struct scsi_dh_data {
 222        struct scsi_device_handler *scsi_dh;
 223        struct scsi_device *sdev;
 224        struct kref kref;
 225        char buf[0];
 226};
 227
 228#define to_scsi_device(d)       \
 229        container_of(d, struct scsi_device, sdev_gendev)
 230#define class_to_sdev(d)        \
 231        container_of(d, struct scsi_device, sdev_dev)
 232#define transport_class_to_sdev(class_dev) \
 233        to_scsi_device(class_dev->parent)
 234
 235#define sdev_printk(prefix, sdev, fmt, a...)    \
 236        dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
 237
 238#define scmd_printk(prefix, scmd, fmt, a...)                            \
 239        (scmd)->request->rq_disk ?                                      \
 240        sdev_printk(prefix, (scmd)->device, "[%s] " fmt,                \
 241                    (scmd)->request->rq_disk->disk_name, ##a) :         \
 242        sdev_printk(prefix, (scmd)->device, fmt, ##a)
 243
 244enum scsi_target_state {
 245        STARGET_CREATED = 1,
 246        STARGET_RUNNING,
 247        STARGET_DEL,
 248};
 249
 250/*
 251 * scsi_target: representation of a scsi target, for now, this is only
 252 * used for single_lun devices. If no one has active IO to the target,
 253 * starget_sdev_user is NULL, else it points to the active sdev.
 254 */
 255struct scsi_target {
 256        struct scsi_device      *starget_sdev_user;
 257        struct list_head        siblings;
 258        struct list_head        devices;
 259        struct device           dev;
 260        unsigned int            reap_ref; /* protected by the host lock */
 261        unsigned int            channel;
 262        unsigned int            id; /* target id ... replace
 263                                     * scsi_device.id eventually */
 264        unsigned int            create:1; /* signal that it needs to be added */
 265        unsigned int            single_lun:1;   /* Indicates we should only
 266                                                 * allow I/O to one of the luns
 267                                                 * for the device at a time. */
 268        unsigned int            pdt_1f_for_no_lun:1;    /* PDT = 0x1f
 269                                                 * means no lun present. */
 270        unsigned int            no_report_luns:1;       /* Don't use
 271                                                 * REPORT LUNS for scanning. */
 272        unsigned int            expecting_lun_change:1; /* A device has reported
 273                                                 * a 3F/0E UA, other devices on
 274                                                 * the same target will also. */
 275        /* commands actually active on LLD. protected by host lock. */
 276        unsigned int            target_busy;
 277        /*
 278         * LLDs should set this in the slave_alloc host template callout.
 279         * If set to zero then there is not limit.
 280         */
 281        unsigned int            can_queue;
 282        unsigned int            target_blocked;
 283        unsigned int            max_target_blocked;
 284#define SCSI_DEFAULT_TARGET_BLOCKED     3
 285
 286        char                    scsi_level;
 287        struct execute_work     ew;
 288        enum scsi_target_state  state;
 289        void                    *hostdata; /* available to low-level driver */
 290        unsigned long           starget_data[0]; /* for the transport */
 291        /* starget_data must be the last element!!!! */
 292} __attribute__((aligned(sizeof(unsigned long))));
 293
 294#define to_scsi_target(d)       container_of(d, struct scsi_target, dev)
 295static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
 296{
 297        return to_scsi_target(sdev->sdev_gendev.parent);
 298}
 299#define transport_class_to_starget(class_dev) \
 300        to_scsi_target(class_dev->parent)
 301
 302#define starget_printk(prefix, starget, fmt, a...)      \
 303        dev_printk(prefix, &(starget)->dev, fmt, ##a)
 304
 305extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
 306                uint, uint, uint, void *hostdata);
 307extern int scsi_add_device(struct Scsi_Host *host, uint channel,
 308                           uint target, uint lun);
 309extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh);
 310extern void scsi_remove_device(struct scsi_device *);
 311extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh);
 312
 313extern int scsi_device_get(struct scsi_device *);
 314extern void scsi_device_put(struct scsi_device *);
 315extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,
 316                                              uint, uint, uint);
 317extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,
 318                                                uint, uint, uint);
 319extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,
 320                                                        uint);
 321extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *,
 322                                                          uint);
 323extern void starget_for_each_device(struct scsi_target *, void *,
 324                     void (*fn)(struct scsi_device *, void *));
 325extern void __starget_for_each_device(struct scsi_target *, void *,
 326                                      void (*fn)(struct scsi_device *,
 327                                                 void *));
 328
 329/* only exposed to implement shost_for_each_device */
 330extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
 331                                                  struct scsi_device *);
 332
 333/**
 334 * shost_for_each_device - iterate over all devices of a host
 335 * @sdev: the &struct scsi_device to use as a cursor
 336 * @shost: the &struct scsi_host to iterate over
 337 *
 338 * Iterator that returns each device attached to @shost.  This loop
 339 * takes a reference on each device and releases it at the end.  If
 340 * you break out of the loop, you must call scsi_device_put(sdev).
 341 */
 342#define shost_for_each_device(sdev, shost) \
 343        for ((sdev) = __scsi_iterate_devices((shost), NULL); \
 344             (sdev); \
 345             (sdev) = __scsi_iterate_devices((shost), (sdev)))
 346
 347/**
 348 * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)
 349 * @sdev: the &struct scsi_device to use as a cursor
 350 * @shost: the &struct scsi_host to iterate over
 351 *
 352 * Iterator that returns each device attached to @shost.  It does _not_
 353 * take a reference on the scsi_device, so the whole loop must be
 354 * protected by shost->host_lock.
 355 *
 356 * Note: The only reason to use this is because you need to access the
 357 * device list in interrupt context.  Otherwise you really want to use
 358 * shost_for_each_device instead.
 359 */
 360#define __shost_for_each_device(sdev, shost) \
 361        list_for_each_entry((sdev), &((shost)->__devices), siblings)
 362
 363extern void scsi_adjust_queue_depth(struct scsi_device *, int, int);
 364extern int scsi_track_queue_full(struct scsi_device *, int);
 365
 366extern int scsi_set_medium_removal(struct scsi_device *, char);
 367
 368extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
 369                           unsigned char *buffer, int len, int timeout,
 370                           int retries, struct scsi_mode_data *data,
 371                           struct scsi_sense_hdr *);
 372extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
 373                            int modepage, unsigned char *buffer, int len,
 374                            int timeout, int retries,
 375                            struct scsi_mode_data *data,
 376                            struct scsi_sense_hdr *);
 377extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,
 378                                int retries, struct scsi_sense_hdr *sshdr);
 379extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf,
 380                             int buf_len);
 381extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
 382                              unsigned int len, unsigned char opcode);
 383extern int scsi_device_set_state(struct scsi_device *sdev,
 384                                 enum scsi_device_state state);
 385extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,
 386                                          gfp_t gfpflags);
 387extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt);
 388extern void sdev_evt_send_simple(struct scsi_device *sdev,
 389                          enum scsi_device_event evt_type, gfp_t gfpflags);
 390extern int scsi_device_quiesce(struct scsi_device *sdev);
 391extern void scsi_device_resume(struct scsi_device *sdev);
 392extern void scsi_target_quiesce(struct scsi_target *);
 393extern void scsi_target_resume(struct scsi_target *);
 394extern void scsi_scan_target(struct device *parent, unsigned int channel,
 395                             unsigned int id, unsigned int lun, int rescan);
 396extern void scsi_target_reap(struct scsi_target *);
 397extern void scsi_target_block(struct device *);
 398extern void scsi_target_unblock(struct device *, enum scsi_device_state);
 399extern void scsi_remove_target(struct device *);
 400extern void int_to_scsilun(unsigned int, struct scsi_lun *);
 401extern int scsilun_to_int(struct scsi_lun *);
 402extern const char *scsi_device_state_name(enum scsi_device_state);
 403extern int scsi_is_sdev_device(const struct device *);
 404extern int scsi_is_target_device(const struct device *);
 405extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
 406                        int data_direction, void *buffer, unsigned bufflen,
 407                        unsigned char *sense, int timeout, int retries,
 408                        int flag, int *resid);
 409extern int scsi_execute_req_flags(struct scsi_device *sdev,
 410        const unsigned char *cmd, int data_direction, void *buffer,
 411        unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,
 412        int retries, int *resid, int flags);
 413static inline int scsi_execute_req(struct scsi_device *sdev,
 414        const unsigned char *cmd, int data_direction, void *buffer,
 415        unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout,
 416        int retries, int *resid)
 417{
 418        return scsi_execute_req_flags(sdev, cmd, data_direction, buffer,
 419                bufflen, sshdr, timeout, retries, resid, 0);
 420}
 421extern void sdev_disable_disk_events(struct scsi_device *sdev);
 422extern void sdev_enable_disk_events(struct scsi_device *sdev);
 423
 424#ifdef CONFIG_PM_RUNTIME
 425extern int scsi_autopm_get_device(struct scsi_device *);
 426extern void scsi_autopm_put_device(struct scsi_device *);
 427#else
 428static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; }
 429static inline void scsi_autopm_put_device(struct scsi_device *d) {}
 430#endif /* CONFIG_PM_RUNTIME */
 431
 432static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)
 433{
 434        return device_reprobe(&sdev->sdev_gendev);
 435}
 436
 437static inline unsigned int sdev_channel(struct scsi_device *sdev)
 438{
 439        return sdev->channel;
 440}
 441
 442static inline unsigned int sdev_id(struct scsi_device *sdev)
 443{
 444        return sdev->id;
 445}
 446
 447#define scmd_id(scmd) sdev_id((scmd)->device)
 448#define scmd_channel(scmd) sdev_channel((scmd)->device)
 449
 450/*
 451 * checks for positions of the SCSI state machine
 452 */
 453static inline int scsi_device_online(struct scsi_device *sdev)
 454{
 455        return (sdev->sdev_state != SDEV_OFFLINE &&
 456                sdev->sdev_state != SDEV_TRANSPORT_OFFLINE &&
 457                sdev->sdev_state != SDEV_DEL);
 458}
 459static inline int scsi_device_blocked(struct scsi_device *sdev)
 460{
 461        return sdev->sdev_state == SDEV_BLOCK ||
 462                sdev->sdev_state == SDEV_CREATED_BLOCK;
 463}
 464static inline int scsi_device_created(struct scsi_device *sdev)
 465{
 466        return sdev->sdev_state == SDEV_CREATED ||
 467                sdev->sdev_state == SDEV_CREATED_BLOCK;
 468}
 469
 470/* accessor functions for the SCSI parameters */
 471static inline int scsi_device_sync(struct scsi_device *sdev)
 472{
 473        return sdev->sdtr;
 474}
 475static inline int scsi_device_wide(struct scsi_device *sdev)
 476{
 477        return sdev->wdtr;
 478}
 479static inline int scsi_device_dt(struct scsi_device *sdev)
 480{
 481        return sdev->ppr;
 482}
 483static inline int scsi_device_dt_only(struct scsi_device *sdev)
 484{
 485        if (sdev->inquiry_len < 57)
 486                return 0;
 487        return (sdev->inquiry[56] & 0x0c) == 0x04;
 488}
 489static inline int scsi_device_ius(struct scsi_device *sdev)
 490{
 491        if (sdev->inquiry_len < 57)
 492                return 0;
 493        return sdev->inquiry[56] & 0x01;
 494}
 495static inline int scsi_device_qas(struct scsi_device *sdev)
 496{
 497        if (sdev->inquiry_len < 57)
 498                return 0;
 499        return sdev->inquiry[56] & 0x02;
 500}
 501static inline int scsi_device_enclosure(struct scsi_device *sdev)
 502{
 503        return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1;
 504}
 505
 506static inline int scsi_device_protection(struct scsi_device *sdev)
 507{
 508        if (sdev->no_dif)
 509                return 0;
 510
 511        return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0);
 512}
 513
 514static inline int scsi_device_tpgs(struct scsi_device *sdev)
 515{
 516        return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0;
 517}
 518
 519#define MODULE_ALIAS_SCSI_DEVICE(type) \
 520        MODULE_ALIAS("scsi:t-" __stringify(type) "*")
 521#define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"
 522
 523#endif /* _SCSI_SCSI_DEVICE_H */
 524