drivers/scsi/scsi_priv.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _SCSI_PRIV_H
   3 #define _SCSI_PRIV_H
   4
   5 #include <linux/device.h>
   6 #include <scsi/scsi_device.h>
   7 #include <linux/sbitmap.h>
   8
   9 struct bsg_device;
  10 struct request_queue;
  11 struct request;
  12 struct scsi_cmnd;
  13 struct scsi_device;
  14 struct scsi_target;
  15 struct scsi_host_template;
  16 struct Scsi_Host;
  17 struct scsi_nl_hdr;
  18
  19 #define SCSI_CMD_RETRIES_NO_LIMIT -1
  20
  21 /*
  22  * Error codes used by scsi-ml internally. These must not be used by drivers.
  23  */
  24 enum 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
  33 static inline u8 scsi_ml_byte(int result)
  34 {
  35         return (result >> 8) & 0xff;
  36 }
  37
  38 /*
  39  * Scsi Error Handler Flags
  40  */
  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 */
  47 extern int scsi_init_hosts(void);
  48 extern void scsi_exit_hosts(void);
  49
  50 /* scsi.c */
  51 int scsi_init_sense_cache(struct Scsi_Host *shost);
  52 void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd);
  53 #ifdef CONFIG_SCSI_LOGGING
  54 void scsi_log_send(struct scsi_cmnd *cmd);
  55 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
  56 #else
  57 static inline void scsi_log_send(struct scsi_cmnd *cmd)
  58         { };
  59 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
  60         { };
  61 #endif
  62
  63 /* scsi_devinfo.c */
  64
  65 /* list of keys for the lists */
  66 enum scsi_devinfo_key {
  67         SCSI_DEVINFO_GLOBAL = 0,
  68         SCSI_DEVINFO_SPI,
  69 };
  70
  71 extern blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
  72                                            const unsigned char *vendor,
  73                                            const unsigned char *model);
  74 extern 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);
  78 extern 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);
  82 extern int scsi_dev_info_list_del_keyed(char *vendor, char *model,
  83                                         enum scsi_devinfo_key key);
  84 extern int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name);
  85 extern int scsi_dev_info_remove_list(enum scsi_devinfo_key key);
  86
  87 extern int __init scsi_init_devinfo(void);
  88 extern void scsi_exit_devinfo(void);
  89
  90 /* scsi_error.c */
  91 extern void scmd_eh_abort_handler(struct work_struct *work);
  92 extern enum blk_eh_timer_return scsi_timeout(struct request *req);
  93 extern int scsi_error_handler(void *host);
  94 extern enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *cmd);
  95 extern void scsi_eh_wakeup(struct Scsi_Host *shost, unsigned int busy);
  96 extern void scsi_eh_scmd_add(struct scsi_cmnd *);
  97 void scsi_eh_ready_devs(struct Scsi_Host *shost,
  98                         struct list_head *work_q,
  99                         struct list_head *done_q);
 100 int scsi_eh_get_sense(struct list_head *work_q,
 101                       struct list_head *done_q);
 102 bool scsi_noretry_cmd(struct scsi_cmnd *scmd);
 103 void scsi_eh_done(struct scsi_cmnd *scmd);
 104
 105 /* scsi_lib.c */
 106 extern void scsi_device_unbusy(struct scsi_device *sdev, struct scsi_cmnd *cmd);
 107 extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
 108 extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
 109 extern void scsi_run_host_queues(struct Scsi_Host *shost);
 110 extern void scsi_requeue_run_queue(struct work_struct *work);
 111 extern void scsi_start_queue(struct scsi_device *sdev);
 112 extern int scsi_mq_setup_tags(struct Scsi_Host *shost);
 113 extern void scsi_mq_free_tags(struct kref *kref);
 114 extern void scsi_exit_queue(void);
 115 extern void scsi_evt_thread(struct work_struct *work);
 116
 117 /* scsi_proc.c */
 118 #ifdef CONFIG_SCSI_PROC_FS
 119 extern int scsi_proc_hostdir_add(const struct scsi_host_template *);
 120 extern void scsi_proc_hostdir_rm(const struct scsi_host_template *);
 121 extern void scsi_proc_host_add(struct Scsi_Host *);
 122 extern void scsi_proc_host_rm(struct Scsi_Host *);
 123 extern int scsi_init_procfs(void);
 124 extern void scsi_exit_procfs(void);
 125 #else
 126 # define scsi_proc_hostdir_add(sht)     0
 127 # 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 */
 135 void scsi_enable_async_suspend(struct device *dev);
 136 extern int scsi_complete_async_scans(void);
 137 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
 138                                    unsigned int, u64, enum scsi_scan_mode);
 139 extern void scsi_forget_host(struct Scsi_Host *);
 140
 141 /* scsi_sysctl.c */
 142 #ifdef CONFIG_SYSCTL
 143 extern int scsi_init_sysctl(void);
 144 extern void scsi_exit_sysctl(void);
 145 #else
 146 # define scsi_init_sysctl()             (0)
 147 # define scsi_exit_sysctl()             do { } while (0)
 148 #endif /* CONFIG_SYSCTL */
 149
 150 /* scsi_sysfs.c */
 151 extern int scsi_sysfs_add_sdev(struct scsi_device *);
 152 extern int scsi_sysfs_add_host(struct Scsi_Host *);
 153 extern int scsi_sysfs_register(void);
 154 extern void scsi_sysfs_unregister(void);
 155 extern void scsi_sysfs_device_initialize(struct scsi_device *);
 156 extern struct scsi_transport_template blank_transport_template;
 157 extern void __scsi_remove_device(struct scsi_device *);
 158
 159 extern const struct bus_type scsi_bus_type;
 160 extern const struct attribute_group *scsi_shost_groups[];
 161
 162 /* scsi_netlink.c */
 163 #ifdef CONFIG_SCSI_NETLINK
 164 extern void scsi_netlink_init(void);
 165 extern void scsi_netlink_exit(void);
 166 extern struct sock *scsi_nl_sock;
 167 #else
 168 static inline void scsi_netlink_init(void) {}
 169 static inline void scsi_netlink_exit(void) {}
 170 #endif
 171
 172 /* scsi_pm.c */
 173 #ifdef CONFIG_PM
 174 extern const struct dev_pm_ops scsi_bus_pm_ops;
 175
 176 extern void scsi_autopm_get_target(struct scsi_target *);
 177 extern void scsi_autopm_put_target(struct scsi_target *);
 178 extern int scsi_autopm_get_host(struct Scsi_Host *);
 179 extern void scsi_autopm_put_host(struct Scsi_Host *);
 180 #else
 181 static inline void scsi_autopm_get_target(struct scsi_target *t) {}
 182 static inline void scsi_autopm_put_target(struct scsi_target *t) {}
 183 static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; }
 184 static inline void scsi_autopm_put_host(struct Scsi_Host *h) {}
 185 #endif /* CONFIG_PM */
 186
 187 /* scsi_dh.c */
 188 #ifdef CONFIG_SCSI_DH
 189 void scsi_dh_add_device(struct scsi_device *sdev);
 190 void scsi_dh_release_device(struct scsi_device *sdev);
 191 #else
 192 static inline void scsi_dh_add_device(struct scsi_device *sdev) { }
 193 static inline void scsi_dh_release_device(struct scsi_device *sdev) { }
 194 #endif
 195
 196 struct bsg_device *scsi_bsg_register_queue(struct scsi_device *sdev);
 197
 198 extern int scsi_device_max_queue_depth(struct scsi_device *sdev);
 199
 200 /*
 201  * internal scsi timeout functions: for use by mid-layer and transport
 202  * classes.
 203  */
 204
 205 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT   600     /* units in seconds */
 206
 207 #endif /* _SCSI_PRIV_H */