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 <linux/async.h>
   7 #include <scsi/scsi_device.h>
   8
   9 struct request_queue;
  10 struct request;
  11 struct scsi_cmnd;
  12 struct scsi_device;
  13 struct scsi_target;
  14 struct scsi_host_template;
  15 struct Scsi_Host;
  16 struct scsi_nl_hdr;
  17
  18
  19 /*
  20  * Scsi Error Handler Flags
  21  */
  22 #define SCSI_EH_ABORT_SCHEDULED 0x0002  /* Abort has been scheduled */
  23
  24 #define SCSI_SENSE_VALID(scmd) \
  25         (((scmd)->sense_buffer[0] & 0x70) == 0x70)
  26
  27 /* hosts.c */
  28 extern int scsi_init_hosts(void);
  29 extern void scsi_exit_hosts(void);
  30
  31 /* scsi.c */
  32 extern bool scsi_use_blk_mq;
  33 int scsi_init_sense_cache(struct Scsi_Host *shost);
  34 void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd);
  35 #ifdef CONFIG_SCSI_LOGGING
  36 void scsi_log_send(struct scsi_cmnd *cmd);
  37 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
  38 #else
  39 static inline void scsi_log_send(struct scsi_cmnd *cmd)
  40         { };
  41 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
  42         { };
  43 #endif
  44
  45 /* scsi_devinfo.c */
  46
  47 /* list of keys for the lists */
  48 enum scsi_devinfo_key {
  49         SCSI_DEVINFO_GLOBAL = 0,
  50         SCSI_DEVINFO_SPI,
  51 };
  52
  53 extern blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
  54                                            const unsigned char *vendor,
  55                                            const unsigned char *model);
  56 extern blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
  57                                                  const unsigned char *vendor,
  58                                                  const unsigned char *model,
  59                                                  enum scsi_devinfo_key key);
  60 extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor,
  61                                         char *model, char *strflags,
  62                                         blist_flags_t flags,
  63                                         enum scsi_devinfo_key key);
  64 extern int scsi_dev_info_list_del_keyed(char *vendor, char *model,
  65                                         enum scsi_devinfo_key key);
  66 extern int scsi_dev_info_add_list(enum scsi_devinfo_key key, const char *name);
  67 extern int scsi_dev_info_remove_list(enum scsi_devinfo_key key);
  68
  69 extern int __init scsi_init_devinfo(void);
  70 extern void scsi_exit_devinfo(void);
  71
  72 /* scsi_error.c */
  73 extern void scmd_eh_abort_handler(struct work_struct *work);
  74 extern enum blk_eh_timer_return scsi_times_out(struct request *req);
  75 extern int scsi_error_handler(void *host);
  76 extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
  77 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
  78 extern void scsi_eh_scmd_add(struct scsi_cmnd *);
  79 void scsi_eh_ready_devs(struct Scsi_Host *shost,
  80                         struct list_head *work_q,
  81                         struct list_head *done_q);
  82 int scsi_eh_get_sense(struct list_head *work_q,
  83                       struct list_head *done_q);
  84 int scsi_noretry_cmd(struct scsi_cmnd *scmd);
  85
  86 /* scsi_lib.c */
  87 extern void scsi_add_cmd_to_list(struct scsi_cmnd *cmd);
  88 extern void scsi_del_cmd_from_list(struct scsi_cmnd *cmd);
  89 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
  90 extern void scsi_device_unbusy(struct scsi_device *sdev, struct scsi_cmnd *cmd);
  91 extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
  92 extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
  93 extern void scsi_run_host_queues(struct Scsi_Host *shost);
  94 extern void scsi_requeue_run_queue(struct work_struct *work);
  95 extern struct request_queue *scsi_mq_alloc_queue(struct scsi_device *sdev);
  96 extern void scsi_start_queue(struct scsi_device *sdev);
  97 extern int scsi_mq_setup_tags(struct Scsi_Host *shost);
  98 extern void scsi_mq_destroy_tags(struct Scsi_Host *shost);
  99 extern int scsi_init_queue(void);
 100 extern void scsi_exit_queue(void);
 101 extern void scsi_evt_thread(struct work_struct *work);
 102 struct request_queue;
 103 struct request;
 104
 105 /* scsi_proc.c */
 106 #ifdef CONFIG_SCSI_PROC_FS
 107 extern void scsi_proc_hostdir_add(struct scsi_host_template *);
 108 extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
 109 extern void scsi_proc_host_add(struct Scsi_Host *);
 110 extern void scsi_proc_host_rm(struct Scsi_Host *);
 111 extern int scsi_init_procfs(void);
 112 extern void scsi_exit_procfs(void);
 113 #else
 114 # define scsi_proc_hostdir_add(sht)     do { } while (0)
 115 # define scsi_proc_hostdir_rm(sht)      do { } while (0)
 116 # define scsi_proc_host_add(shost)      do { } while (0)
 117 # define scsi_proc_host_rm(shost)       do { } while (0)
 118 # define scsi_init_procfs()             (0)
 119 # define scsi_exit_procfs()             do { } while (0)
 120 #endif /* CONFIG_PROC_FS */
 121
 122 /* scsi_scan.c */
 123 extern char scsi_scan_type[];
 124 extern int scsi_complete_async_scans(void);
 125 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
 126                                    unsigned int, u64, enum scsi_scan_mode);
 127 extern void scsi_forget_host(struct Scsi_Host *);
 128 extern void scsi_rescan_device(struct device *);
 129
 130 /* scsi_sysctl.c */
 131 #ifdef CONFIG_SYSCTL
 132 extern int scsi_init_sysctl(void);
 133 extern void scsi_exit_sysctl(void);
 134 #else
 135 # define scsi_init_sysctl()             (0)
 136 # define scsi_exit_sysctl()             do { } while (0)
 137 #endif /* CONFIG_SYSCTL */
 138
 139 /* scsi_sysfs.c */
 140 extern int scsi_sysfs_add_sdev(struct scsi_device *);
 141 extern int scsi_sysfs_add_host(struct Scsi_Host *);
 142 extern int scsi_sysfs_register(void);
 143 extern void scsi_sysfs_unregister(void);
 144 extern void scsi_sysfs_device_initialize(struct scsi_device *);
 145 extern int scsi_sysfs_target_initialize(struct scsi_device *);
 146 extern struct scsi_transport_template blank_transport_template;
 147 extern void __scsi_remove_device(struct scsi_device *);
 148
 149 extern struct bus_type scsi_bus_type;
 150 extern const struct attribute_group *scsi_sysfs_shost_attr_groups[];
 151
 152 /* scsi_netlink.c */
 153 #ifdef CONFIG_SCSI_NETLINK
 154 extern void scsi_netlink_init(void);
 155 extern void scsi_netlink_exit(void);
 156 extern struct sock *scsi_nl_sock;
 157 #else
 158 static inline void scsi_netlink_init(void) {}
 159 static inline void scsi_netlink_exit(void) {}
 160 #endif
 161
 162 /* scsi_pm.c */
 163 #ifdef CONFIG_PM
 164 extern const struct dev_pm_ops scsi_bus_pm_ops;
 165
 166 extern void scsi_autopm_get_target(struct scsi_target *);
 167 extern void scsi_autopm_put_target(struct scsi_target *);
 168 extern int scsi_autopm_get_host(struct Scsi_Host *);
 169 extern void scsi_autopm_put_host(struct Scsi_Host *);
 170 #else
 171 static inline void scsi_autopm_get_target(struct scsi_target *t) {}
 172 static inline void scsi_autopm_put_target(struct scsi_target *t) {}
 173 static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; }
 174 static inline void scsi_autopm_put_host(struct Scsi_Host *h) {}
 175 #endif /* CONFIG_PM */
 176
 177 extern struct async_domain scsi_sd_pm_domain;
 178
 179 /* scsi_dh.c */
 180 #ifdef CONFIG_SCSI_DH
 181 void scsi_dh_add_device(struct scsi_device *sdev);
 182 void scsi_dh_release_device(struct scsi_device *sdev);
 183 #else
 184 static inline void scsi_dh_add_device(struct scsi_device *sdev) { }
 185 static inline void scsi_dh_release_device(struct scsi_device *sdev) { }
 186 #endif
 187
 188 /*
 189  * internal scsi timeout functions: for use by mid-layer and transport
 190  * classes.
 191  */
 192
 193 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT   600     /* units in seconds */
 194
 195 #endif /* _SCSI_PRIV_H */