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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _SCSI_SCSI_DEVICE_H3#define _SCSI_SCSI_DEVICE_H4 5#include <linux/list.h>6#include <linux/spinlock.h>7#include <linux/workqueue.h>8#include <linux/blk-mq.h>9#include <scsi/scsi.h>10#include <linux/atomic.h>11#include <linux/sbitmap.h>12 13struct bsg_device;14struct device;15struct request_queue;16struct scsi_cmnd;17struct scsi_lun;18struct scsi_sense_hdr;19 20typedef __u64 __bitwise blist_flags_t;21 22#define SCSI_SENSE_BUFFERSIZE 9623 24struct scsi_mode_data {25 __u32 length;26 __u16 block_descriptor_length;27 __u8 medium_type;28 __u8 device_specific;29 __u8 header_length;30 __u8 longlba:1;31};32 33/*34 * sdev state: If you alter this, you also need to alter scsi_sysfs.c35 * (for the ascii descriptions) and the state model enforcer:36 * scsi_lib:scsi_device_set_state().37 */38enum scsi_device_state {39 SDEV_CREATED = 1, /* device created but not added to sysfs40 * Only internal commands allowed (for inq) */41 SDEV_RUNNING, /* device properly configured42 * All commands allowed */43 SDEV_CANCEL, /* beginning to delete device44 * Only error handler commands allowed */45 SDEV_DEL, /* device deleted 46 * no commands allowed */47 SDEV_QUIESCE, /* Device quiescent. No block commands48 * will be accepted, only specials (which49 * originate in the mid-layer) */50 SDEV_OFFLINE, /* Device offlined (by error handling or51 * user request */52 SDEV_TRANSPORT_OFFLINE, /* Offlined by transport class error handler */53 SDEV_BLOCK, /* Device blocked by scsi lld. No54 * scsi commands from user or midlayer55 * should be issued to the scsi56 * lld. */57 SDEV_CREATED_BLOCK, /* same as above but for created devices */58};59 60enum scsi_scan_mode {61 SCSI_SCAN_INITIAL = 0,62 SCSI_SCAN_RESCAN,63 SCSI_SCAN_MANUAL,64};65 66enum scsi_device_event {67 SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */68 SDEV_EVT_INQUIRY_CHANGE_REPORTED, /* 3F 03 UA reported */69 SDEV_EVT_CAPACITY_CHANGE_REPORTED, /* 2A 09 UA reported */70 SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED, /* 38 07 UA reported */71 SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED, /* 2A 01 UA reported */72 SDEV_EVT_LUN_CHANGE_REPORTED, /* 3F 0E UA reported */73 SDEV_EVT_ALUA_STATE_CHANGE_REPORTED, /* 2A 06 UA reported */74 SDEV_EVT_POWER_ON_RESET_OCCURRED, /* 29 00 UA reported */75 76 SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE,77 SDEV_EVT_LAST = SDEV_EVT_POWER_ON_RESET_OCCURRED,78 79 SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 180};81 82struct scsi_event {83 enum scsi_device_event evt_type;84 struct list_head node;85 86 /* put union of data structures, for non-simple event types,87 * here88 */89};90 91/**92 * struct scsi_vpd - SCSI Vital Product Data93 * @rcu: For kfree_rcu().94 * @len: Length in bytes of @data.95 * @data: VPD data as defined in various T10 SCSI standard documents.96 */97struct scsi_vpd {98 struct rcu_head rcu;99 int len;100 unsigned char data[];101};102 103struct scsi_device {104 struct Scsi_Host *host;105 struct request_queue *request_queue;106 107 /* the next two are protected by the host->host_lock */108 struct list_head siblings; /* list of all devices on this host */109 struct list_head same_target_siblings; /* just the devices sharing same target id */110 111 struct sbitmap budget_map;112 atomic_t device_blocked; /* Device returned QUEUE_FULL. */113 114 atomic_t restarts;115 spinlock_t list_lock;116 struct list_head starved_entry;117 unsigned short queue_depth; /* How deep of a queue we want */118 unsigned short max_queue_depth; /* max queue depth */119 unsigned short last_queue_full_depth; /* These two are used by */120 unsigned short last_queue_full_count; /* scsi_track_queue_full() */121 unsigned long last_queue_full_time; /* last queue full time */122 unsigned long queue_ramp_up_period; /* ramp up period in jiffies */123#define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ)124 125 unsigned long last_queue_ramp_up; /* last queue ramp up time */126 127 unsigned int id, channel;128 u64 lun;129 unsigned int manufacturer; /* Manufacturer of device, for using 130 * vendor-specific cmd's */131 unsigned sector_size; /* size in bytes */132 133 void *hostdata; /* available to low-level driver */134 unsigned char type;135 char scsi_level;136 char inq_periph_qual; /* PQ from INQUIRY data */ 137 struct mutex inquiry_mutex;138 unsigned char inquiry_len; /* valid bytes in 'inquiry' */139 unsigned char * inquiry; /* INQUIRY response data */140 const char * vendor; /* [back_compat] point into 'inquiry' ... */141 const char * model; /* ... after scan; point to static string */142 const char * rev; /* ... "nullnullnullnull" before scan */143 144#define SCSI_DEFAULT_VPD_LEN 255 /* default SCSI VPD page size (max) */145 struct scsi_vpd __rcu *vpd_pg0;146 struct scsi_vpd __rcu *vpd_pg83;147 struct scsi_vpd __rcu *vpd_pg80;148 struct scsi_vpd __rcu *vpd_pg89;149 struct scsi_vpd __rcu *vpd_pgb0;150 struct scsi_vpd __rcu *vpd_pgb1;151 struct scsi_vpd __rcu *vpd_pgb2;152 struct scsi_vpd __rcu *vpd_pgb7;153 154 struct scsi_target *sdev_target;155 156 blist_flags_t sdev_bflags; /* black/white flags as also found in157 * scsi_devinfo.[hc]. For now used only to158 * pass settings from slave_alloc to scsi159 * core. */160 unsigned int eh_timeout; /* Error handling timeout */161 162 /*163 * If true, let the high-level device driver (sd) manage the device164 * power state for system suspend/resume (suspend to RAM and165 * hibernation) operations.166 */167 unsigned manage_system_start_stop:1;168 169 /*170 * If true, let the high-level device driver (sd) manage the device171 * power state for runtime device suspand and resume operations.172 */173 unsigned manage_runtime_start_stop:1;174 175 /*176 * If true, let the high-level device driver (sd) manage the device177 * power state for system shutdown (power off) operations.178 */179 unsigned manage_shutdown:1;180 181 /*182 * If set and if the device is runtime suspended, ask the high-level183 * device driver (sd) to force a runtime resume of the device.184 */185 unsigned force_runtime_start_on_system_start:1;186 187 unsigned removable:1;188 unsigned changed:1; /* Data invalid due to media change */189 unsigned busy:1; /* Used to prevent races */190 unsigned lockable:1; /* Able to prevent media removal */191 unsigned locked:1; /* Media removal disabled */192 unsigned borken:1; /* Tell the Seagate driver to be 193 * painfully slow on this device */194 unsigned disconnect:1; /* can disconnect */195 unsigned soft_reset:1; /* Uses soft reset option */196 unsigned sdtr:1; /* Device supports SDTR messages */197 unsigned wdtr:1; /* Device supports WDTR messages */198 unsigned ppr:1; /* Device supports PPR messages */199 unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */200 unsigned simple_tags:1; /* simple queue tag messages are enabled */201 unsigned was_reset:1; /* There was a bus reset on the bus for 202 * this device */203 unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN204 * because we did a bus reset. */205 unsigned use_10_for_rw:1; /* first try 10-byte read / write */206 unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */207 unsigned set_dbd_for_ms:1; /* Set "DBD" field in mode sense */208 unsigned read_before_ms:1; /* perform a READ before MODE SENSE */209 unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */210 unsigned no_write_same:1; /* no WRITE SAME command */211 unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */212 unsigned use_16_for_sync:1; /* Use sync (16) over sync (10) */213 unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */214 unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */215 unsigned skip_vpd_pages:1; /* do not read VPD pages */216 unsigned try_vpd_pages:1; /* attempt to read VPD pages */217 unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */218 unsigned no_start_on_add:1; /* do not issue start on add */219 unsigned allow_restart:1; /* issue START_UNIT in error handler */220 unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */221 unsigned no_uld_attach:1; /* disable connecting to upper level drivers */222 unsigned select_no_atn:1;223 unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */224 unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */225 unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */226 unsigned last_sector_bug:1; /* do not use multisector accesses on227 SD_LAST_BUGGY_SECTORS */228 unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */229 unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */230 unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */231 unsigned security_supported:1; /* Supports Security Protocols */232 unsigned is_visible:1; /* is the device visible in sysfs */233 unsigned wce_default_on:1; /* Cache is ON by default */234 unsigned no_dif:1; /* T10 PI (DIF) should be disabled */235 unsigned broken_fua:1; /* Don't set FUA bit */236 unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */237 unsigned unmap_limit_for_ws:1; /* Use the UNMAP limit for WRITE SAME */238 unsigned rpm_autosuspend:1; /* Enable runtime autosuspend at device239 * creation time */240 unsigned ignore_media_change:1; /* Ignore MEDIA CHANGE on resume */241 unsigned silence_suspend:1; /* Do not print runtime PM related messages */242 unsigned no_vpd_size:1; /* No VPD size reported in header */243 244 unsigned cdl_supported:1; /* Command duration limits supported */245 unsigned cdl_enable:1; /* Enable/disable Command duration limits */246 247 unsigned int queue_stopped; /* request queue is quiesced */248 bool offline_already; /* Device offline message logged */249 250 atomic_t disk_events_disable_depth; /* disable depth for disk events */251 252 DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */253 DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */254 struct list_head event_list; /* asserted events */255 struct work_struct event_work;256 257 unsigned int max_device_blocked; /* what device_blocked counts down from */258#define SCSI_DEFAULT_DEVICE_BLOCKED 3259 260 atomic_t iorequest_cnt;261 atomic_t iodone_cnt;262 atomic_t ioerr_cnt;263 atomic_t iotmo_cnt;264 265 struct device sdev_gendev,266 sdev_dev;267 268 struct work_struct requeue_work;269 270 struct scsi_device_handler *handler;271 void *handler_data;272 273 size_t dma_drain_len;274 void *dma_drain_buf;275 276 unsigned int sg_timeout;277 unsigned int sg_reserved_size;278 279 struct bsg_device *bsg_dev;280 unsigned char access_state;281 struct mutex state_mutex;282 enum scsi_device_state sdev_state;283 struct task_struct *quiesced_by;284 unsigned long sdev_data[];285} __attribute__((aligned(sizeof(unsigned long))));286 287#define to_scsi_device(d) \288 container_of(d, struct scsi_device, sdev_gendev)289#define class_to_sdev(d) \290 container_of(d, struct scsi_device, sdev_dev)291#define transport_class_to_sdev(class_dev) \292 to_scsi_device(class_dev->parent)293 294#define sdev_dbg(sdev, fmt, a...) \295 dev_dbg(&(sdev)->sdev_gendev, fmt, ##a)296 297/*298 * like scmd_printk, but the device name is passed in299 * as a string pointer300 */301__printf(4, 5) void302sdev_prefix_printk(const char *, const struct scsi_device *, const char *,303 const char *, ...);304 305#define sdev_printk(l, sdev, fmt, a...) \306 sdev_prefix_printk(l, sdev, NULL, fmt, ##a)307 308__printf(3, 4) void309scmd_printk(const char *, const struct scsi_cmnd *, const char *, ...);310 311#define scmd_dbg(scmd, fmt, a...) \312 do { \313 struct request *__rq = scsi_cmd_to_rq((scmd)); \314 \315 if (__rq->q->disk) \316 sdev_dbg((scmd)->device, "[%s] " fmt, \317 __rq->q->disk->disk_name, ##a); \318 else \319 sdev_dbg((scmd)->device, fmt, ##a); \320 } while (0)321 322enum scsi_target_state {323 STARGET_CREATED = 1,324 STARGET_RUNNING,325 STARGET_REMOVE,326 STARGET_CREATED_REMOVE,327 STARGET_DEL,328};329 330/*331 * scsi_target: representation of a scsi target, for now, this is only332 * used for single_lun devices. If no one has active IO to the target,333 * starget_sdev_user is NULL, else it points to the active sdev.334 */335struct scsi_target {336 struct scsi_device *starget_sdev_user;337 struct list_head siblings;338 struct list_head devices;339 struct device dev;340 struct kref reap_ref; /* last put renders target invisible */341 unsigned int channel;342 unsigned int id; /* target id ... replace343 * scsi_device.id eventually */344 unsigned int create:1; /* signal that it needs to be added */345 unsigned int single_lun:1; /* Indicates we should only346 * allow I/O to one of the luns347 * for the device at a time. */348 unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f349 * means no lun present. */350 unsigned int no_report_luns:1; /* Don't use351 * REPORT LUNS for scanning. */352 unsigned int expecting_lun_change:1; /* A device has reported353 * a 3F/0E UA, other devices on354 * the same target will also. */355 /* commands actually active on LLD. */356 atomic_t target_busy;357 atomic_t target_blocked;358 359 /*360 * LLDs should set this in the slave_alloc host template callout.361 * If set to zero then there is not limit.362 */363 unsigned int can_queue;364 unsigned int max_target_blocked;365#define SCSI_DEFAULT_TARGET_BLOCKED 3366 367 char scsi_level;368 enum scsi_target_state state;369 void *hostdata; /* available to low-level driver */370 unsigned long starget_data[]; /* for the transport */371 /* starget_data must be the last element!!!! */372} __attribute__((aligned(sizeof(unsigned long))));373 374#define to_scsi_target(d) container_of(d, struct scsi_target, dev)375static inline struct scsi_target *scsi_target(struct scsi_device *sdev)376{377 return to_scsi_target(sdev->sdev_gendev.parent);378}379#define transport_class_to_starget(class_dev) \380 to_scsi_target(class_dev->parent)381 382#define starget_printk(prefix, starget, fmt, a...) \383 dev_printk(prefix, &(starget)->dev, fmt, ##a)384 385extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,386 uint, uint, u64, void *hostdata);387extern int scsi_add_device(struct Scsi_Host *host, uint channel,388 uint target, u64 lun);389extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh);390extern void scsi_remove_device(struct scsi_device *);391extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh);392void scsi_attach_vpd(struct scsi_device *sdev);393void scsi_cdl_check(struct scsi_device *sdev);394int scsi_cdl_enable(struct scsi_device *sdev, bool enable);395 396extern struct scsi_device *scsi_device_from_queue(struct request_queue *q);397extern int __must_check scsi_device_get(struct scsi_device *);398extern void scsi_device_put(struct scsi_device *);399extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *,400 uint, uint, u64);401extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *,402 uint, uint, u64);403extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *,404 u64);405extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *,406 u64);407extern void starget_for_each_device(struct scsi_target *, void *,408 void (*fn)(struct scsi_device *, void *));409extern void __starget_for_each_device(struct scsi_target *, void *,410 void (*fn)(struct scsi_device *,411 void *));412 413/* only exposed to implement shost_for_each_device */414extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,415 struct scsi_device *);416 417/**418 * shost_for_each_device - iterate over all devices of a host419 * @sdev: the &struct scsi_device to use as a cursor420 * @shost: the &struct scsi_host to iterate over421 *422 * Iterator that returns each device attached to @shost. This loop423 * takes a reference on each device and releases it at the end. If424 * you break out of the loop, you must call scsi_device_put(sdev).425 */426#define shost_for_each_device(sdev, shost) \427 for ((sdev) = __scsi_iterate_devices((shost), NULL); \428 (sdev); \429 (sdev) = __scsi_iterate_devices((shost), (sdev)))430 431/**432 * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)433 * @sdev: the &struct scsi_device to use as a cursor434 * @shost: the &struct scsi_host to iterate over435 *436 * Iterator that returns each device attached to @shost. It does _not_437 * take a reference on the scsi_device, so the whole loop must be438 * protected by shost->host_lock.439 *440 * Note: The only reason to use this is because you need to access the441 * device list in interrupt context. Otherwise you really want to use442 * shost_for_each_device instead.443 */444#define __shost_for_each_device(sdev, shost) \445 list_for_each_entry((sdev), &((shost)->__devices), siblings)446 447extern int scsi_change_queue_depth(struct scsi_device *, int);448extern int scsi_track_queue_full(struct scsi_device *, int);449 450extern int scsi_set_medium_removal(struct scsi_device *, char);451 452int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,453 int subpage, unsigned char *buffer, int len, int timeout,454 int retries, struct scsi_mode_data *data,455 struct scsi_sense_hdr *);456extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,457 unsigned char *buffer, int len, int timeout,458 int retries, struct scsi_mode_data *data,459 struct scsi_sense_hdr *);460extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout,461 int retries, struct scsi_sense_hdr *sshdr);462extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf,463 int buf_len);464int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,465 unsigned int len, unsigned char opcode,466 unsigned short sa);467extern int scsi_device_set_state(struct scsi_device *sdev,468 enum scsi_device_state state);469extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,470 gfp_t gfpflags);471extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt);472extern void sdev_evt_send_simple(struct scsi_device *sdev,473 enum scsi_device_event evt_type, gfp_t gfpflags);474extern int scsi_device_quiesce(struct scsi_device *sdev);475extern void scsi_device_resume(struct scsi_device *sdev);476extern void scsi_target_quiesce(struct scsi_target *);477extern void scsi_target_resume(struct scsi_target *);478extern void scsi_scan_target(struct device *parent, unsigned int channel,479 unsigned int id, u64 lun,480 enum scsi_scan_mode rescan);481extern void scsi_target_reap(struct scsi_target *);482void scsi_block_targets(struct Scsi_Host *shost, struct device *dev);483extern void scsi_target_unblock(struct device *, enum scsi_device_state);484extern void scsi_remove_target(struct device *);485extern const char *scsi_device_state_name(enum scsi_device_state);486extern int scsi_is_sdev_device(const struct device *);487extern int scsi_is_target_device(const struct device *);488extern void scsi_sanitize_inquiry_string(unsigned char *s, int len);489 490/*491 * scsi_execute_cmd users can set scsi_failure.result to have492 * scsi_check_passthrough fail/retry a command. scsi_failure.result can be a493 * specific host byte or message code, or SCMD_FAILURE_RESULT_ANY can be used494 * to match any host or message code.495 */496#define SCMD_FAILURE_RESULT_ANY 0x7fffffff497/*498 * Set scsi_failure.result to SCMD_FAILURE_STAT_ANY to fail/retry any failure499 * scsi_status_is_good returns false for.500 */501#define SCMD_FAILURE_STAT_ANY 0xff502/*503 * The following can be set to the scsi_failure sense, asc and ascq fields to504 * match on any sense, ASC, or ASCQ value.505 */506#define SCMD_FAILURE_SENSE_ANY 0xff507#define SCMD_FAILURE_ASC_ANY 0xff508#define SCMD_FAILURE_ASCQ_ANY 0xff509/* Always retry a matching failure. */510#define SCMD_FAILURE_NO_LIMIT -1511 512struct scsi_failure {513 int result;514 u8 sense;515 u8 asc;516 u8 ascq;517 /*518 * Number of times scsi_execute_cmd will retry the failure. It does519 * not count for the total_allowed.520 */521 s8 allowed;522 /* Number of times the failure has been retried. */523 s8 retries;524};525 526struct scsi_failures {527 /*528 * If a scsi_failure does not have a retry limit setup this limit will529 * be used.530 */531 int total_allowed;532 int total_retries;533 struct scsi_failure *failure_definitions;534};535 536/* Optional arguments to scsi_execute_cmd */537struct scsi_exec_args {538 unsigned char *sense; /* sense buffer */539 unsigned int sense_len; /* sense buffer len */540 struct scsi_sense_hdr *sshdr; /* decoded sense header */541 blk_mq_req_flags_t req_flags; /* BLK_MQ_REQ flags */542 int scmd_flags; /* SCMD flags */543 int *resid; /* residual length */544 struct scsi_failures *failures; /* failures to retry */545};546 547int scsi_execute_cmd(struct scsi_device *sdev, const unsigned char *cmd,548 blk_opf_t opf, void *buffer, unsigned int bufflen,549 int timeout, int retries,550 const struct scsi_exec_args *args);551void scsi_failures_reset_retries(struct scsi_failures *failures);552 553extern void sdev_disable_disk_events(struct scsi_device *sdev);554extern void sdev_enable_disk_events(struct scsi_device *sdev);555extern int scsi_vpd_lun_id(struct scsi_device *, char *, size_t);556extern int scsi_vpd_tpg_id(struct scsi_device *, int *);557 558#ifdef CONFIG_PM559extern int scsi_autopm_get_device(struct scsi_device *);560extern void scsi_autopm_put_device(struct scsi_device *);561#else562static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; }563static inline void scsi_autopm_put_device(struct scsi_device *d) {}564#endif /* CONFIG_PM */565 566static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)567{568 return device_reprobe(&sdev->sdev_gendev);569}570 571static inline unsigned int sdev_channel(struct scsi_device *sdev)572{573 return sdev->channel;574}575 576static inline unsigned int sdev_id(struct scsi_device *sdev)577{578 return sdev->id;579}580 581#define scmd_id(scmd) sdev_id((scmd)->device)582#define scmd_channel(scmd) sdev_channel((scmd)->device)583 584/*585 * checks for positions of the SCSI state machine586 */587static inline int scsi_device_online(struct scsi_device *sdev)588{589 return (sdev->sdev_state != SDEV_OFFLINE &&590 sdev->sdev_state != SDEV_TRANSPORT_OFFLINE &&591 sdev->sdev_state != SDEV_DEL);592}593static inline int scsi_device_blocked(struct scsi_device *sdev)594{595 return sdev->sdev_state == SDEV_BLOCK ||596 sdev->sdev_state == SDEV_CREATED_BLOCK;597}598static inline int scsi_device_created(struct scsi_device *sdev)599{600 return sdev->sdev_state == SDEV_CREATED ||601 sdev->sdev_state == SDEV_CREATED_BLOCK;602}603 604int scsi_internal_device_block_nowait(struct scsi_device *sdev);605int scsi_internal_device_unblock_nowait(struct scsi_device *sdev,606 enum scsi_device_state new_state);607 608/* accessor functions for the SCSI parameters */609static inline int scsi_device_sync(struct scsi_device *sdev)610{611 return sdev->sdtr;612}613static inline int scsi_device_wide(struct scsi_device *sdev)614{615 return sdev->wdtr;616}617static inline int scsi_device_dt(struct scsi_device *sdev)618{619 return sdev->ppr;620}621static inline int scsi_device_dt_only(struct scsi_device *sdev)622{623 if (sdev->inquiry_len < 57)624 return 0;625 return (sdev->inquiry[56] & 0x0c) == 0x04;626}627static inline int scsi_device_ius(struct scsi_device *sdev)628{629 if (sdev->inquiry_len < 57)630 return 0;631 return sdev->inquiry[56] & 0x01;632}633static inline int scsi_device_qas(struct scsi_device *sdev)634{635 if (sdev->inquiry_len < 57)636 return 0;637 return sdev->inquiry[56] & 0x02;638}639static inline int scsi_device_enclosure(struct scsi_device *sdev)640{641 return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1;642}643 644static inline int scsi_device_protection(struct scsi_device *sdev)645{646 if (sdev->no_dif)647 return 0;648 649 return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0);650}651 652static inline int scsi_device_tpgs(struct scsi_device *sdev)653{654 return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0;655}656 657/**658 * scsi_device_supports_vpd - test if a device supports VPD pages659 * @sdev: the &struct scsi_device to test660 *661 * If the 'try_vpd_pages' flag is set it takes precedence.662 * Otherwise we will assume VPD pages are supported if the663 * SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set.664 */665static inline int scsi_device_supports_vpd(struct scsi_device *sdev)666{667 /* Attempt VPD inquiry if the device blacklist explicitly calls668 * for it.669 */670 if (sdev->try_vpd_pages)671 return 1;672 /*673 * Although VPD inquiries can go to SCSI-2 type devices,674 * some USB ones crash on receiving them, and the pages675 * we currently ask for are mandatory for SPC-2 and beyond676 */677 if (sdev->scsi_level >= SCSI_SPC_2 && !sdev->skip_vpd_pages)678 return 1;679 return 0;680}681 682static inline int scsi_device_busy(struct scsi_device *sdev)683{684 return sbitmap_weight(&sdev->budget_map);685}686 687#define MODULE_ALIAS_SCSI_DEVICE(type) \688 MODULE_ALIAS("scsi:t-" __stringify(type) "*")689#define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"690 691#endif /* _SCSI_SCSI_DEVICE_H */692