| /* SPDX-License-Identifier: GPL-2.0 */ | |
| #ifndef _SCSI_SCSI_DEVICE_H | |
| #define _SCSI_SCSI_DEVICE_H | |
| #include <linux/list.h> | |
| #include <linux/spinlock.h> | |
| #include <linux/workqueue.h> | |
| #include <linux/blk-mq.h> | |
| #include <scsi/scsi.h> | |
| #include <scsi/scsi_common.h> | |
| #include <linux/atomic.h> | |
| #include <linux/sbitmap.h> | |
| struct bsg_device; | |
| struct device; | |
| struct request_queue; | |
| struct scsi_cmnd; | |
| struct scsi_lun; | |
| struct scsi_sense_hdr; | |
| typedef __u64 __bitwise blist_flags_t; | |
| #define SCSI_SENSE_BUFFERSIZE 96 | |
| struct scsi_mode_data { | |
| __u32 length; | |
| __u16 block_descriptor_length; | |
| __u8 medium_type; | |
| __u8 device_specific; | |
| __u8 header_length; | |
| __u8 longlba:1; | |
| }; | |
| /* | |
| * sdev state: If you alter this, you also need to alter scsi_sysfs.c | |
| * (for the ascii descriptions) and the state model enforcer: | |
| * scsi_lib:scsi_device_set_state(). | |
| */ | |
| enum scsi_device_state { | |
| SDEV_CREATED = 1, /* device created but not added to sysfs | |
| * Only internal commands allowed (for inq) */ | |
| SDEV_RUNNING, /* device properly configured | |
| * All commands allowed */ | |
| SDEV_CANCEL, /* beginning to delete device | |
| * Only error handler commands allowed */ | |
| SDEV_DEL, /* device deleted | |
| * no commands allowed */ | |
| SDEV_QUIESCE, /* Device quiescent. No block commands | |
| * will be accepted, only specials (which | |
| * originate in the mid-layer) */ | |
| SDEV_OFFLINE, /* Device offlined (by error handling or | |
| * user request */ | |
| SDEV_TRANSPORT_OFFLINE, /* Offlined by transport class error handler */ | |
| SDEV_BLOCK, /* Device blocked by scsi lld. No | |
| * scsi commands from user or midlayer | |
| * should be issued to the scsi | |
| * lld. */ | |
| SDEV_CREATED_BLOCK, /* same as above but for created devices */ | |
| }; | |
| enum scsi_scan_mode { | |
| SCSI_SCAN_INITIAL = 0, | |
| SCSI_SCAN_RESCAN, | |
| SCSI_SCAN_MANUAL, | |
| }; | |
| enum scsi_device_event { | |
| SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */ | |
| SDEV_EVT_INQUIRY_CHANGE_REPORTED, /* 3F 03 UA reported */ | |
| SDEV_EVT_CAPACITY_CHANGE_REPORTED, /* 2A 09 UA reported */ | |
| SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED, /* 38 07 UA reported */ | |
| SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED, /* 2A 01 UA reported */ | |
| SDEV_EVT_LUN_CHANGE_REPORTED, /* 3F 0E UA reported */ | |
| SDEV_EVT_ALUA_STATE_CHANGE_REPORTED, /* 2A 06 UA reported */ | |
| SDEV_EVT_POWER_ON_RESET_OCCURRED, /* 29 00 UA reported */ | |
| SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE, | |
| SDEV_EVT_LAST = SDEV_EVT_POWER_ON_RESET_OCCURRED, | |
| SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1 | |
| }; | |
| struct scsi_event { | |
| enum scsi_device_event evt_type; | |
| struct list_head node; | |
| /* put union of data structures, for non-simple event types, | |
| * here | |
| */ | |
| }; | |
| /** | |
| * struct scsi_vpd - SCSI Vital Product Data | |
| * @rcu: For kfree_rcu(). | |
| * @len: Length in bytes of @data. | |
| * @data: VPD data as defined in various T10 SCSI standard documents. | |
| */ | |
| struct scsi_vpd { | |
| struct rcu_head rcu; | |
| int len; | |
| unsigned char data[]; | |
| }; | |
| struct scsi_device { | |
| struct Scsi_Host *host; | |
| struct request_queue *request_queue; | |
| /* the next two are protected by the host->host_lock */ | |
| struct list_head siblings; /* list of all devices on this host */ | |
| struct list_head same_target_siblings; /* just the devices sharing same target id */ | |
| struct sbitmap budget_map; | |
| atomic_t device_blocked; /* Device returned QUEUE_FULL. */ | |
| atomic_t restarts; | |
| spinlock_t list_lock; | |
| struct list_head starved_entry; | |
| unsigned short queue_depth; /* How deep of a queue we want */ | |
| unsigned short max_queue_depth; /* max queue depth */ | |
| unsigned short last_queue_full_depth; /* These two are used by */ | |
| unsigned short last_queue_full_count; /* scsi_track_queue_full() */ | |
| unsigned long last_queue_full_time; /* last queue full time */ | |
| unsigned long queue_ramp_up_period; /* ramp up period in jiffies */ | |
| #define SCSI_DEFAULT_RAMP_UP_PERIOD (120 * HZ) | |
| unsigned long last_queue_ramp_up; /* last queue ramp up time */ | |
| unsigned int id, channel; | |
| u64 lun; | |
| unsigned int manufacturer; /* Manufacturer of device, for using | |
| * vendor-specific cmd's */ | |
| unsigned sector_size; /* size in bytes */ | |
| void *hostdata; /* available to low-level driver */ | |
| unsigned char type; | |
| char scsi_level; | |
| char inq_periph_qual; /* PQ from INQUIRY data */ | |
| struct mutex inquiry_mutex; | |
| unsigned char inquiry_len; /* valid bytes in 'inquiry' */ | |
| unsigned char * inquiry; /* INQUIRY response data */ | |
| char vendor[INQUIRY_VENDOR_LEN + 1]; | |
| char model[INQUIRY_MODEL_LEN + 1]; | |
| char rev[INQUIRY_REVISION_LEN + 1]; | |
| #define SCSI_DEFAULT_VPD_LEN 255 /* default SCSI VPD page size (max) */ | |
| struct scsi_vpd __rcu *vpd_pg0; | |
| struct scsi_vpd __rcu *vpd_pg83; | |
| struct scsi_vpd __rcu *vpd_pg80; | |
| struct scsi_vpd __rcu *vpd_pg89; | |
| struct scsi_vpd __rcu *vpd_pgb0; | |
| struct scsi_vpd __rcu *vpd_pgb1; | |
| struct scsi_vpd __rcu *vpd_pgb2; | |
| struct scsi_vpd __rcu *vpd_pgb7; | |
| struct scsi_target *sdev_target; | |
| blist_flags_t sdev_bflags; /* black/white flags as also found in | |
| * scsi_devinfo.[hc]. For now used only to | |
| * pass settings from sdev_init to scsi | |
| * core. */ | |
| unsigned int eh_timeout; /* Error handling timeout */ | |
| /* | |
| * If true, let the high-level device driver (sd) manage the device | |
| * power state for system suspend/resume (suspend to RAM and | |
| * hibernation) operations. | |
| */ | |
| unsigned manage_system_start_stop:1; | |
| /* | |
| * If true, let the high-level device driver (sd) manage the device | |
| * power state for runtime device suspand and resume operations. | |
| */ | |
| unsigned manage_runtime_start_stop:1; | |
| /* | |
| * If true, let the high-level device driver (sd) manage the device | |
| * power state for system shutdown (power off) operations. | |
| */ | |
| unsigned manage_shutdown:1; | |
| /* | |
| * If true, let the high-level device driver (sd) manage the device | |
| * power state for system restart (reboot) operations. | |
| */ | |
| unsigned manage_restart:1; | |
| /* | |
| * If set and if the device is runtime suspended, ask the high-level | |
| * device driver (sd) to force a runtime resume of the device. | |
| */ | |
| unsigned force_runtime_start_on_system_start:1; | |
| /* | |
| * Set if the device is an ATA device. | |
| */ | |
| unsigned is_ata:1; | |
| unsigned removable:1; | |
| unsigned changed:1; /* Data invalid due to media change */ | |
| unsigned busy:1; /* Used to prevent races */ | |
| unsigned lockable:1; /* Able to prevent media removal */ | |
| unsigned locked:1; /* Media removal disabled */ | |
| unsigned borken:1; /* Tell the Seagate driver to be | |
| * painfully slow on this device */ | |
| unsigned disconnect:1; /* can disconnect */ | |
| unsigned soft_reset:1; /* Uses soft reset option */ | |
| unsigned sdtr:1; /* Device supports SDTR messages */ | |
| unsigned wdtr:1; /* Device supports WDTR messages */ | |
| unsigned ppr:1; /* Device supports PPR messages */ | |
| unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ | |
| unsigned simple_tags:1; /* simple queue tag messages are enabled */ | |
| unsigned was_reset:1; /* There was a bus reset on the bus for | |
| * this device */ | |
| unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN | |
| * because we did a bus reset. */ | |
| unsigned use_10_for_rw:1; /* first try 10-byte read / write */ | |
| unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */ | |
| unsigned set_dbd_for_ms:1; /* Set "DBD" field in mode sense */ | |
| unsigned read_before_ms:1; /* perform a READ before MODE SENSE */ | |
| unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */ | |
| unsigned no_write_same:1; /* no WRITE SAME command */ | |
| unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */ | |
| unsigned use_16_for_sync:1; /* Use sync (16) over sync (10) */ | |
| unsigned skip_ms_page_8:1; /* do not use MODE SENSE page 0x08 */ | |
| unsigned skip_ms_page_3f:1; /* do not use MODE SENSE page 0x3f */ | |
| unsigned skip_vpd_pages:1; /* do not read VPD pages */ | |
| unsigned try_vpd_pages:1; /* attempt to read VPD pages */ | |
| unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ | |
| unsigned no_start_on_add:1; /* do not issue start on add */ | |
| unsigned allow_restart:1; /* issue START_UNIT in error handler */ | |
| unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ | |
| unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ | |
| unsigned select_no_atn:1; | |
| unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ | |
| unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ | |
| unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ | |
| unsigned last_sector_bug:1; /* do not use multisector accesses on | |
| SD_LAST_BUGGY_SECTORS */ | |
| unsigned no_read_disc_info:1; /* Avoid READ_DISC_INFO cmds */ | |
| unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */ | |
| unsigned try_rc_10_first:1; /* Try READ_CAPACACITY_10 first */ | |
| unsigned security_supported:1; /* Supports Security Protocols */ | |
| unsigned is_visible:1; /* is the device visible in sysfs */ | |
| unsigned wce_default_on:1; /* Cache is ON by default */ | |
| unsigned no_dif:1; /* T10 PI (DIF) should be disabled */ | |
| unsigned broken_fua:1; /* Don't set FUA bit */ | |
| unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */ | |
| unsigned unmap_limit_for_ws:1; /* Use the UNMAP limit for WRITE SAME */ | |
| unsigned rpm_autosuspend:1; /* Enable runtime autosuspend at device | |
| * creation time */ | |
| unsigned ignore_media_change:1; /* Ignore MEDIA CHANGE on resume */ | |
| unsigned silence_suspend:1; /* Do not print runtime PM related messages */ | |
| unsigned no_vpd_size:1; /* No VPD size reported in header */ | |
| unsigned cdl_supported:1; /* Command duration limits supported */ | |
| unsigned cdl_enable:1; /* Enable/disable Command duration limits */ | |
| unsigned int queue_stopped; /* request queue is quiesced */ | |
| bool offline_already; /* Device offline message logged */ | |
| atomic_t ua_new_media_ctr; /* Counter for New Media UNIT ATTENTIONs */ | |
| atomic_t ua_por_ctr; /* Counter for Power On / Reset UAs */ | |
| atomic_t disk_events_disable_depth; /* disable depth for disk events */ | |
| DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ | |
| DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */ | |
| struct list_head event_list; /* asserted events */ | |
| struct work_struct event_work; | |
| unsigned int max_device_blocked; /* what device_blocked counts down from */ | |
| #define SCSI_DEFAULT_DEVICE_BLOCKED 3 | |
| atomic_t iorequest_cnt; | |
| atomic_t iodone_cnt; | |
| atomic_t ioerr_cnt; | |
| atomic_t iotmo_cnt; | |
| struct device sdev_gendev, | |
| sdev_dev; | |
| struct work_struct requeue_work; | |
| struct scsi_device_handler *handler; | |
| void *handler_data; | |
| size_t dma_drain_len; | |
| void *dma_drain_buf; | |
| unsigned int sg_timeout; | |
| unsigned int sg_reserved_size; | |
| struct bsg_device *bsg_dev; | |
| unsigned char access_state; | |
| struct mutex state_mutex; | |
| enum scsi_device_state sdev_state; | |
| struct task_struct *quiesced_by; | |
| unsigned long sdev_data[]; | |
| } __attribute__((aligned(sizeof(unsigned long)))); | |
| #define to_scsi_device(d) \ | |
| container_of(d, struct scsi_device, sdev_gendev) | |
| #define class_to_sdev(d) \ | |
| container_of(d, struct scsi_device, sdev_dev) | |
| #define transport_class_to_sdev(class_dev) \ | |
| to_scsi_device(class_dev->parent) | |
| #define sdev_dbg(sdev, fmt, a...) \ | |
| dev_dbg(&(sdev)->sdev_gendev, fmt, ##a) | |
| /* | |
| * like scmd_printk, but the device name is passed in | |
| * as a string pointer | |
| */ | |
| __printf(4, 5) void | |
| sdev_prefix_printk(const char *, const struct scsi_device *, const char *, | |
| const char *, ...); | |
| #define sdev_printk(l, sdev, fmt, a...) \ | |
| sdev_prefix_printk(l, sdev, NULL, fmt, ##a) | |
| __printf(3, 4) void scmd_printk(const char *, struct scsi_cmnd *, const char *, | |
| ...); | |
| #define scmd_dbg(scmd, fmt, a...) \ | |
| do { \ | |
| struct request *__rq = scsi_cmd_to_rq((scmd)); \ | |
| \ | |
| if (__rq->q->disk) \ | |
| sdev_dbg((scmd)->device, "[%s] " fmt, \ | |
| __rq->q->disk->disk_name, ##a); \ | |
| else \ | |
| sdev_dbg((scmd)->device, fmt, ##a); \ | |
| } while (0) | |
| enum scsi_target_state { | |
| STARGET_CREATED = 1, | |
| STARGET_RUNNING, | |
| STARGET_REMOVE, | |
| STARGET_CREATED_REMOVE, | |
| STARGET_DEL, | |
| }; | |
| /* | |
| * scsi_target: representation of a scsi target, for now, this is only | |
| * used for single_lun devices. If no one has active IO to the target, | |
| * starget_sdev_user is NULL, else it points to the active sdev. | |
| */ | |
| struct scsi_target { | |
| struct scsi_device *starget_sdev_user; | |
| struct list_head siblings; | |
| struct list_head devices; | |
| struct device dev; | |
| struct kref reap_ref; /* last put renders target invisible */ | |
| unsigned int channel; | |
| unsigned int id; /* target id ... replace | |
| * scsi_device.id eventually */ | |
| unsigned int create:1; /* signal that it needs to be added */ | |
| unsigned int single_lun:1; /* Indicates we should only | |
| * allow I/O to one of the luns | |
| * for the device at a time. */ | |
| unsigned int pdt_1f_for_no_lun:1; /* PDT = 0x1f | |
| * means no lun present. */ | |
| unsigned int no_report_luns:1; /* Don't use | |
| * REPORT LUNS for scanning. */ | |
| unsigned int expecting_lun_change:1; /* A device has reported | |
| * a 3F/0E UA, other devices on | |
| * the same target will also. */ | |
| /* commands actually active on LLD. */ | |
| atomic_t target_busy; | |
| atomic_t target_blocked; | |
| /* | |
| * LLDs should set this in the sdev_init host template callout. | |
| * If set to zero then there is not limit. | |
| */ | |
| unsigned int can_queue; | |
| unsigned int max_target_blocked; | |
| #define SCSI_DEFAULT_TARGET_BLOCKED 3 | |
| char scsi_level; | |
| enum scsi_target_state state; | |
| void *hostdata; /* available to low-level driver */ | |
| unsigned long starget_data[]; /* for the transport */ | |
| /* starget_data must be the last element!!!! */ | |
| } __attribute__((aligned(sizeof(unsigned long)))); | |
| #define to_scsi_target(d) container_of(d, struct scsi_target, dev) | |
| static inline struct scsi_target *scsi_target(struct scsi_device *sdev) | |
| { | |
| return to_scsi_target(sdev->sdev_gendev.parent); | |
| } | |
| #define transport_class_to_starget(class_dev) \ | |
| to_scsi_target(class_dev->parent) | |
| #define starget_printk(prefix, starget, fmt, a...) \ | |
| dev_printk(prefix, &(starget)->dev, fmt, ##a) | |
| extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, | |
| uint, uint, u64, void *hostdata); | |
| extern int scsi_add_device(struct Scsi_Host *host, uint channel, | |
| uint target, u64 lun); | |
| extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); | |
| extern void scsi_remove_device(struct scsi_device *); | |
| extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); | |
| void scsi_attach_vpd(struct scsi_device *sdev); | |
| void scsi_cdl_check(struct scsi_device *sdev); | |
| int scsi_cdl_enable(struct scsi_device *sdev, bool enable); | |
| extern int __must_check scsi_device_get(struct scsi_device *); | |
| extern void scsi_device_put(struct scsi_device *); | |
| extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, | |
| uint, uint, u64); | |
| extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, | |
| uint, uint, u64); | |
| extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, | |
| u64); | |
| extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, | |
| u64); | |
| extern void starget_for_each_device(struct scsi_target *, void *, | |
| void (*fn)(struct scsi_device *, void *)); | |
| extern void __starget_for_each_device(struct scsi_target *, void *, | |
| void (*fn)(struct scsi_device *, | |
| void *)); | |
| /* only exposed to implement shost_for_each_device */ | |
| extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, | |
| struct scsi_device *); | |
| /** | |
| * shost_for_each_device - iterate over all devices of a host | |
| * @sdev: the &struct scsi_device to use as a cursor | |
| * @shost: the &struct scsi_host to iterate over | |
| * | |
| * Iterator that returns each device attached to @shost. This loop | |
| * takes a reference on each device and releases it at the end. If | |
| * you break out of the loop, you must call scsi_device_put(sdev). | |
| */ | |
| #define shost_for_each_device(sdev, shost) \ | |
| for ((sdev) = __scsi_iterate_devices((shost), NULL); \ | |
| (sdev); \ | |
| (sdev) = __scsi_iterate_devices((shost), (sdev))) | |
| /** | |
| * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) | |
| * @sdev: the &struct scsi_device to use as a cursor | |
| * @shost: the &struct scsi_host to iterate over | |
| * | |
| * Iterator that returns each device attached to @shost. It does _not_ | |
| * take a reference on the scsi_device, so the whole loop must be | |
| * protected by shost->host_lock. | |
| * | |
| * Note: The only reason to use this is because you need to access the | |
| * device list in interrupt context. Otherwise you really want to use | |
| * shost_for_each_device instead. | |
| */ | |
| #define __shost_for_each_device(sdev, shost) \ | |
| list_for_each_entry((sdev), &((shost)->__devices), siblings) | |
| extern int scsi_change_queue_depth(struct scsi_device *, int); | |
| extern int scsi_track_queue_full(struct scsi_device *, int); | |
| extern int scsi_set_medium_removal(struct scsi_device *, char); | |
| int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, | |
| int subpage, unsigned char *buffer, int len, int timeout, | |
| int retries, struct scsi_mode_data *data, | |
| struct scsi_sense_hdr *); | |
| extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, | |
| unsigned char *buffer, int len, int timeout, | |
| int retries, struct scsi_mode_data *data, | |
| struct scsi_sense_hdr *); | |
| extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, | |
| int retries, struct scsi_sense_hdr *sshdr); | |
| extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, | |
| int buf_len); | |
| int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer, | |
| unsigned int len, unsigned char opcode, | |
| unsigned short sa); | |
| extern int scsi_device_set_state(struct scsi_device *sdev, | |
| enum scsi_device_state state); | |
| extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, | |
| gfp_t gfpflags); | |
| extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); | |
| extern void sdev_evt_send_simple(struct scsi_device *sdev, | |
| enum scsi_device_event evt_type, gfp_t gfpflags); | |
| extern int scsi_device_quiesce(struct scsi_device *sdev); | |
| extern void scsi_device_resume(struct scsi_device *sdev); | |
| extern void scsi_target_quiesce(struct scsi_target *); | |
| extern void scsi_target_resume(struct scsi_target *); | |
| extern void scsi_scan_target(struct device *parent, unsigned int channel, | |
| unsigned int id, u64 lun, | |
| enum scsi_scan_mode rescan); | |
| extern void scsi_target_reap(struct scsi_target *); | |
| void scsi_block_targets(struct Scsi_Host *shost, struct device *dev); | |
| extern void scsi_target_unblock(struct device *, enum scsi_device_state); | |
| extern void scsi_remove_target(struct device *); | |
| extern const char *scsi_device_state_name(enum scsi_device_state); | |
| extern int scsi_is_sdev_device(const struct device *); | |
| extern int scsi_is_target_device(const struct device *); | |
| extern void scsi_sanitize_inquiry_string(unsigned char *s, int len); | |
| /* | |
| * scsi_execute_cmd users can set scsi_failure.result to have | |
| * scsi_check_passthrough fail/retry a command. scsi_failure.result can be a | |
| * specific host byte or message code, or SCMD_FAILURE_RESULT_ANY can be used | |
| * to match any host or message code. | |
| */ | |
| #define SCMD_FAILURE_RESULT_ANY 0x7fffffff | |
| /* | |
| * Set scsi_failure.result to SCMD_FAILURE_STAT_ANY to fail/retry any failure | |
| * scsi_status_is_good returns false for. | |
| */ | |
| #define SCMD_FAILURE_STAT_ANY 0xff | |
| /* | |
| * The following can be set to the scsi_failure sense, asc and ascq fields to | |
| * match on any sense, ASC, or ASCQ value. | |
| */ | |
| #define SCMD_FAILURE_SENSE_ANY 0xff | |
| #define SCMD_FAILURE_ASC_ANY 0xff | |
| #define SCMD_FAILURE_ASCQ_ANY 0xff | |
| /* Always retry a matching failure. */ | |
| #define SCMD_FAILURE_NO_LIMIT -1 | |
| struct scsi_failure { | |
| int result; | |
| u8 sense; | |
| u8 asc; | |
| u8 ascq; | |
| /* | |
| * Number of times scsi_execute_cmd will retry the failure. It does | |
| * not count for the total_allowed. | |
| */ | |
| s8 allowed; | |
| /* Number of times the failure has been retried. */ | |
| s8 retries; | |
| }; | |
| struct scsi_failures { | |
| /* | |
| * If a scsi_failure does not have a retry limit setup this limit will | |
| * be used. | |
| */ | |
| int total_allowed; | |
| int total_retries; | |
| struct scsi_failure *failure_definitions; | |
| }; | |
| /* Optional arguments to scsi_execute_cmd */ | |
| struct scsi_exec_args { | |
| unsigned char *sense; /* sense buffer */ | |
| unsigned int sense_len; /* sense buffer len */ | |
| struct scsi_sense_hdr *sshdr; /* decoded sense header */ | |
| blk_mq_req_flags_t req_flags; /* BLK_MQ_REQ flags */ | |
| int scmd_flags; /* SCMD flags */ | |
| int *resid; /* residual length */ | |
| struct scsi_failures *failures; /* failures to retry */ | |
| }; | |
| int scsi_execute_cmd(struct scsi_device *sdev, const unsigned char *cmd, | |
| blk_opf_t opf, void *buffer, unsigned int bufflen, | |
| int timeout, int retries, | |
| const struct scsi_exec_args *args); | |
| void scsi_failures_reset_retries(struct scsi_failures *failures); | |
| struct scsi_cmnd *scsi_get_internal_cmd(struct scsi_device *sdev, | |
| enum dma_data_direction data_direction, | |
| blk_mq_req_flags_t flags); | |
| void scsi_put_internal_cmd(struct scsi_cmnd *scmd); | |
| extern void sdev_disable_disk_events(struct scsi_device *sdev); | |
| extern void sdev_enable_disk_events(struct scsi_device *sdev); | |
| extern int scsi_vpd_lun_id(struct scsi_device *, char *, size_t); | |
| extern int scsi_vpd_lun_serial(struct scsi_device *, char *, size_t); | |
| extern int scsi_vpd_tpg_id(struct scsi_device *, int *); | |
| #ifdef CONFIG_PM | |
| extern int scsi_autopm_get_device(struct scsi_device *); | |
| extern void scsi_autopm_put_device(struct scsi_device *); | |
| #else | |
| static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; } | |
| static inline void scsi_autopm_put_device(struct scsi_device *d) {} | |
| #endif /* CONFIG_PM */ | |
| static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) | |
| { | |
| return device_reprobe(&sdev->sdev_gendev); | |
| } | |
| static inline unsigned int sdev_channel(struct scsi_device *sdev) | |
| { | |
| return sdev->channel; | |
| } | |
| static inline unsigned int sdev_id(struct scsi_device *sdev) | |
| { | |
| return sdev->id; | |
| } | |
| #define scmd_id(scmd) sdev_id((scmd)->device) | |
| #define scmd_channel(scmd) sdev_channel((scmd)->device) | |
| /** | |
| * scsi_device_is_pseudo_dev() - Whether a device is a pseudo SCSI device. | |
| * @sdev: SCSI device to examine | |
| * | |
| * A pseudo SCSI device can be used to allocate SCSI commands but does not show | |
| * up in sysfs. Additionally, the logical unit information in *@sdev is made up. | |
| * | |
| * This function tests the LUN number instead of comparing @sdev with | |
| * @sdev->host->pseudo_sdev because this function may be called before | |
| * @sdev->host->pseudo_sdev has been initialized. | |
| */ | |
| static inline bool scsi_device_is_pseudo_dev(struct scsi_device *sdev) | |
| { | |
| return sdev->lun == U64_MAX; | |
| } | |
| /* | |
| * checks for positions of the SCSI state machine | |
| */ | |
| static inline int scsi_device_online(struct scsi_device *sdev) | |
| { | |
| return (sdev->sdev_state != SDEV_OFFLINE && | |
| sdev->sdev_state != SDEV_TRANSPORT_OFFLINE && | |
| sdev->sdev_state != SDEV_DEL); | |
| } | |
| static inline int scsi_device_blocked(struct scsi_device *sdev) | |
| { | |
| return sdev->sdev_state == SDEV_BLOCK || | |
| sdev->sdev_state == SDEV_CREATED_BLOCK; | |
| } | |
| static inline int scsi_device_created(struct scsi_device *sdev) | |
| { | |
| return sdev->sdev_state == SDEV_CREATED || | |
| sdev->sdev_state == SDEV_CREATED_BLOCK; | |
| } | |
| int scsi_internal_device_block_nowait(struct scsi_device *sdev); | |
| int scsi_internal_device_unblock_nowait(struct scsi_device *sdev, | |
| enum scsi_device_state new_state); | |
| /* accessor functions for the SCSI parameters */ | |
| static inline int scsi_device_sync(struct scsi_device *sdev) | |
| { | |
| return sdev->sdtr; | |
| } | |
| static inline int scsi_device_wide(struct scsi_device *sdev) | |
| { | |
| return sdev->wdtr; | |
| } | |
| static inline int scsi_device_dt(struct scsi_device *sdev) | |
| { | |
| return sdev->ppr; | |
| } | |
| static inline int scsi_device_dt_only(struct scsi_device *sdev) | |
| { | |
| if (sdev->inquiry_len < 57) | |
| return 0; | |
| return (sdev->inquiry[56] & 0x0c) == 0x04; | |
| } | |
| static inline int scsi_device_ius(struct scsi_device *sdev) | |
| { | |
| if (sdev->inquiry_len < 57) | |
| return 0; | |
| return sdev->inquiry[56] & 0x01; | |
| } | |
| static inline int scsi_device_qas(struct scsi_device *sdev) | |
| { | |
| if (sdev->inquiry_len < 57) | |
| return 0; | |
| return sdev->inquiry[56] & 0x02; | |
| } | |
| static inline int scsi_device_enclosure(struct scsi_device *sdev) | |
| { | |
| return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; | |
| } | |
| static inline int scsi_device_protection(struct scsi_device *sdev) | |
| { | |
| if (sdev->no_dif) | |
| return 0; | |
| return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); | |
| } | |
| static inline int scsi_device_tpgs(struct scsi_device *sdev) | |
| { | |
| return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; | |
| } | |
| /** | |
| * scsi_device_supports_vpd - test if a device supports VPD pages | |
| * @sdev: the &struct scsi_device to test | |
| * | |
| * If the 'try_vpd_pages' flag is set it takes precedence. | |
| * Otherwise we will assume VPD pages are supported if the | |
| * SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set. | |
| */ | |
| static inline int scsi_device_supports_vpd(struct scsi_device *sdev) | |
| { | |
| /* Attempt VPD inquiry if the device blacklist explicitly calls | |
| * for it. | |
| */ | |
| if (sdev->try_vpd_pages) | |
| return 1; | |
| /* | |
| * Although VPD inquiries can go to SCSI-2 type devices, | |
| * some USB ones crash on receiving them, and the pages | |
| * we currently ask for are mandatory for SPC-2 and beyond | |
| */ | |
| if (sdev->scsi_level >= SCSI_SPC_2 && !sdev->skip_vpd_pages) | |
| return 1; | |
| return 0; | |
| } | |
| static inline int scsi_device_busy(struct scsi_device *sdev) | |
| { | |
| return sbitmap_weight(&sdev->budget_map); | |
| } | |
| /* Macros to access the UNIT ATTENTION counters */ | |
| #define scsi_get_ua_new_media_ctr(sdev) atomic_read(&sdev->ua_new_media_ctr) | |
| #define scsi_get_ua_por_ctr(sdev) atomic_read(&sdev->ua_por_ctr) | |
| #define MODULE_ALIAS_SCSI_DEVICE(type) \ | |
| MODULE_ALIAS("scsi:t-" __stringify(type) "*") | |
| #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" | |
| #endif /* _SCSI_SCSI_DEVICE_H */ |