208 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _SCSI_PRIV_H3#define _SCSI_PRIV_H4 5#include <linux/device.h>6#include <scsi/scsi_device.h>7#include <linux/sbitmap.h>8 9struct bsg_device;10struct request_queue;11struct request;12struct scsi_cmnd;13struct scsi_device;14struct scsi_target;15struct scsi_host_template;16struct Scsi_Host;17struct scsi_nl_hdr;18 19#define SCSI_CMD_RETRIES_NO_LIMIT -120 21/*22 * Error codes used by scsi-ml internally. These must not be used by drivers.23 */24enum scsi_ml_status {25 SCSIML_STAT_OK = 0x00,26 SCSIML_STAT_RESV_CONFLICT = 0x01, /* Reservation conflict */27 SCSIML_STAT_NOSPC = 0x02, /* Space allocation on the dev failed */28 SCSIML_STAT_MED_ERROR = 0x03, /* Medium error */29 SCSIML_STAT_TGT_FAILURE = 0x04, /* Permanent target failure */30 SCSIML_STAT_DL_TIMEOUT = 0x05, /* Command Duration Limit timeout */31};32 33static inline u8 scsi_ml_byte(int result)34{35 return (result >> 8) & 0xff;36}37 38/*39 * Scsi Error Handler Flags40 */41#define SCSI_EH_ABORT_SCHEDULED 0x0002 /* Abort has been scheduled */42 43#define SCSI_SENSE_VALID(scmd) \44 (((scmd)->sense_buffer[0] & 0x70) == 0x70)45 46/* hosts.c */47extern int scsi_init_hosts(void);48extern void scsi_exit_hosts(void);49 50/* scsi.c */51int scsi_init_sense_cache(struct Scsi_Host *shost);52void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd);53#ifdef CONFIG_SCSI_LOGGING54void scsi_log_send(struct scsi_cmnd *cmd);55void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);56#else57static inline void scsi_log_send(struct scsi_cmnd *cmd) 58 { };59static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)60 { };61#endif62 63/* scsi_devinfo.c */64 65/* list of keys for the lists */66enum scsi_devinfo_key {67 SCSI_DEVINFO_GLOBAL = 0,68 SCSI_DEVINFO_SPI,69};70 71extern blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,72 const unsigned char *vendor,73 const unsigned char *model);74extern blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,75 const unsigned char *vendor,76 const unsigned char *model,77 enum scsi_devinfo_key key);78extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor,79 char *model, char *strflags,80 blist_flags_t flags,81 enum scsi_devinfo_key key);82extern int scsi_dev_info_list_del_keyed(char *vendor, char *model,83 enum scsi_devinfo_key key);84extern int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name);85extern int scsi_dev_info_remove_list(enum scsi_devinfo_key key);86 87extern int __init scsi_init_devinfo(void);88extern void scsi_exit_devinfo(void);89 90/* scsi_error.c */91extern void scmd_eh_abort_handler(struct work_struct *work);92extern enum blk_eh_timer_return scsi_timeout(struct request *req);93extern int scsi_error_handler(void *host);94extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd);95extern void scsi_eh_wakeup(struct Scsi_Host *shost, unsigned int busy);96extern void scsi_eh_scmd_add(struct scsi_cmnd *);97void scsi_eh_ready_devs(struct Scsi_Host *shost,98 struct list_head *work_q,99 struct list_head *done_q);100int scsi_eh_get_sense(struct list_head *work_q,101 struct list_head *done_q);102bool scsi_noretry_cmd(struct scsi_cmnd *scmd);103void scsi_eh_done(struct scsi_cmnd *scmd);104 105/* scsi_lib.c */106extern void scsi_device_unbusy(struct scsi_device *sdev, struct scsi_cmnd *cmd);107extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason);108extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);109extern void scsi_run_host_queues(struct Scsi_Host *shost);110extern void scsi_requeue_run_queue(struct work_struct *work);111extern void scsi_start_queue(struct scsi_device *sdev);112extern int scsi_mq_setup_tags(struct Scsi_Host *shost);113extern void scsi_mq_free_tags(struct kref *kref);114extern void scsi_exit_queue(void);115extern void scsi_evt_thread(struct work_struct *work);116 117/* scsi_proc.c */118#ifdef CONFIG_SCSI_PROC_FS119extern int scsi_proc_hostdir_add(const struct scsi_host_template *);120extern void scsi_proc_hostdir_rm(const struct scsi_host_template *);121extern void scsi_proc_host_add(struct Scsi_Host *);122extern void scsi_proc_host_rm(struct Scsi_Host *);123extern int scsi_init_procfs(void);124extern void scsi_exit_procfs(void);125#else126# define scsi_proc_hostdir_add(sht) 0127# define scsi_proc_hostdir_rm(sht) do { } while (0)128# define scsi_proc_host_add(shost) do { } while (0)129# define scsi_proc_host_rm(shost) do { } while (0)130# define scsi_init_procfs() (0)131# define scsi_exit_procfs() do { } while (0)132#endif /* CONFIG_PROC_FS */133 134/* scsi_scan.c */135void scsi_enable_async_suspend(struct device *dev);136extern int scsi_complete_async_scans(void);137extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,138 unsigned int, u64, enum scsi_scan_mode);139extern void scsi_forget_host(struct Scsi_Host *);140 141/* scsi_sysctl.c */142#ifdef CONFIG_SYSCTL143extern int scsi_init_sysctl(void);144extern void scsi_exit_sysctl(void);145#else146# define scsi_init_sysctl() (0)147# define scsi_exit_sysctl() do { } while (0)148#endif /* CONFIG_SYSCTL */149 150/* scsi_sysfs.c */151extern int scsi_sysfs_add_sdev(struct scsi_device *);152extern int scsi_sysfs_add_host(struct Scsi_Host *);153extern int scsi_sysfs_register(void);154extern void scsi_sysfs_unregister(void);155extern void scsi_sysfs_device_initialize(struct scsi_device *);156extern struct scsi_transport_template blank_transport_template;157extern void __scsi_remove_device(struct scsi_device *);158 159extern const struct bus_type scsi_bus_type;160extern const struct attribute_group *scsi_shost_groups[];161 162/* scsi_netlink.c */163#ifdef CONFIG_SCSI_NETLINK164extern void scsi_netlink_init(void);165extern void scsi_netlink_exit(void);166extern struct sock *scsi_nl_sock;167#else168static inline void scsi_netlink_init(void) {}169static inline void scsi_netlink_exit(void) {}170#endif171 172/* scsi_pm.c */173#ifdef CONFIG_PM174extern const struct dev_pm_ops scsi_bus_pm_ops;175 176extern void scsi_autopm_get_target(struct scsi_target *);177extern void scsi_autopm_put_target(struct scsi_target *);178extern int scsi_autopm_get_host(struct Scsi_Host *);179extern void scsi_autopm_put_host(struct Scsi_Host *);180#else181static inline void scsi_autopm_get_target(struct scsi_target *t) {}182static inline void scsi_autopm_put_target(struct scsi_target *t) {}183static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; }184static inline void scsi_autopm_put_host(struct Scsi_Host *h) {}185#endif /* CONFIG_PM */186 187/* scsi_dh.c */188#ifdef CONFIG_SCSI_DH189void scsi_dh_add_device(struct scsi_device *sdev);190void scsi_dh_release_device(struct scsi_device *sdev);191#else192static inline void scsi_dh_add_device(struct scsi_device *sdev) { }193static inline void scsi_dh_release_device(struct scsi_device *sdev) { }194#endif195 196struct bsg_device *scsi_bsg_register_queue(struct scsi_device *sdev);197 198extern int scsi_device_max_queue_depth(struct scsi_device *sdev);199 200/* 201 * internal scsi timeout functions: for use by mid-layer and transport202 * classes.203 */204 205#define SCSI_DEVICE_BLOCK_MAX_TIMEOUT 600 /* units in seconds */206 207#endif /* _SCSI_PRIV_H */208