drivers/scsi/scsi_priv.h

   1 #ifndef _SCSI_PRIV_H
   2 #define _SCSI_PRIV_H
   3
   4 #include <linux/device.h>
   5 #include <linux/async.h>
   6 #include <scsi/scsi_device.h>
   7
   8 struct request_queue;
   9 struct request;
  10 struct scsi_cmnd;
  11 struct scsi_device;
  12 struct scsi_target;
  13 struct scsi_host_template;
  14 struct Scsi_Host;
  15 struct scsi_nl_hdr;
  16
  17
  18 /*
  19  * Scsi Error Handler Flags
  20  */
  21 #define SCSI_EH_CANCEL_CMD      0x0001  /* Cancel this cmd */
  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 {
  49         SCSI_DEVINFO_GLOBAL = 0,
  50         SCSI_DEVINFO_SPI,
  51 };
  52
  53 extern int scsi_get_device_flags(struct scsi_device *sdev,
  54                                  const unsigned char *vendor,
  55                                  const unsigned char *model);
  56 extern int scsi_get_device_flags_keyed(struct scsi_device *sdev,
  57                                        const unsigned char *vendor,
  58                                        const unsigned char *model, int key);
  59 extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor,
  60                                         char *model, char *strflags,
  61                                         int flags, int key);
  62 extern int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key);
  63 extern int scsi_dev_info_add_list(int key, const char *name);
  64 extern int scsi_dev_info_remove_list(int key);
  65
  66 extern int __init scsi_init_devinfo(void);
  67 extern void scsi_exit_devinfo(void);
  68
  69 /* scsi_error.c */
  70 extern void scmd_eh_abort_handler(struct work_struct *work);
  71 extern enum blk_eh_timer_return scsi_times_out(struct request *req);
  72 extern int scsi_error_handler(void *host);
  73 extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
  74 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
  75 extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
  76 void scsi_eh_ready_devs(struct Scsi_Host *shost,
  77                         struct list_head *work_q,
  78                         struct list_head *done_q);
  79 int scsi_eh_get_sense(struct list_head *work_q,
  80                       struct list_head *done_q);
  81 int scsi_noretry_cmd(struct scsi_cmnd *scmd);
  82
  83 /* scsi_lib.c */
  84 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
  85 extern void scsi_device_unbusy(struct scsi_device *sdev);
  86 extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
  87 extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
  88 extern void scsi_run_host_queues(struct Scsi_Host *shost);
  89 extern void scsi_requeue_run_queue(struct work_struct *work);
  90 extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
  91 extern struct request_queue *scsi_mq_alloc_queue(struct scsi_device *sdev);
  92 extern int scsi_mq_setup_tags(struct Scsi_Host *shost);
  93 extern void scsi_mq_destroy_tags(struct Scsi_Host *shost);
  94 extern int scsi_init_queue(void);
  95 extern void scsi_exit_queue(void);
  96 extern void scsi_evt_thread(struct work_struct *work);
  97 struct request_queue;
  98 struct request;
  99
 100 /* scsi_proc.c */
 101 #ifdef CONFIG_SCSI_PROC_FS
 102 extern void scsi_proc_hostdir_add(struct scsi_host_template *);
 103 extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
 104 extern void scsi_proc_host_add(struct Scsi_Host *);
 105 extern void scsi_proc_host_rm(struct Scsi_Host *);
 106 extern int scsi_init_procfs(void);
 107 extern void scsi_exit_procfs(void);
 108 #else
 109 # define scsi_proc_hostdir_add(sht)     do { } while (0)
 110 # define scsi_proc_hostdir_rm(sht)      do { } while (0)
 111 # define scsi_proc_host_add(shost)      do { } while (0)
 112 # define scsi_proc_host_rm(shost)       do { } while (0)
 113 # define scsi_init_procfs()             (0)
 114 # define scsi_exit_procfs()             do { } while (0)
 115 #endif /* CONFIG_PROC_FS */
 116
 117 /* scsi_scan.c */
 118 extern char scsi_scan_type[];
 119 extern int scsi_complete_async_scans(void);
 120 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
 121                                    unsigned int, u64, enum scsi_scan_mode);
 122 extern void scsi_forget_host(struct Scsi_Host *);
 123 extern void scsi_rescan_device(struct device *);
 124
 125 /* scsi_sysctl.c */
 126 #ifdef CONFIG_SYSCTL
 127 extern int scsi_init_sysctl(void);
 128 extern void scsi_exit_sysctl(void);
 129 #else
 130 # define scsi_init_sysctl()             (0)
 131 # define scsi_exit_sysctl()             do { } while (0)
 132 #endif /* CONFIG_SYSCTL */
 133
 134 /* scsi_sysfs.c */
 135 extern int scsi_sysfs_add_sdev(struct scsi_device *);
 136 extern int scsi_sysfs_add_host(struct Scsi_Host *);
 137 extern int scsi_sysfs_register(void);
 138 extern void scsi_sysfs_unregister(void);
 139 extern void scsi_sysfs_device_initialize(struct scsi_device *);
 140 extern int scsi_sysfs_target_initialize(struct scsi_device *);
 141 extern struct scsi_transport_template blank_transport_template;
 142 extern void __scsi_remove_device(struct scsi_device *);
 143
 144 extern struct bus_type scsi_bus_type;
 145 extern const struct attribute_group *scsi_sysfs_shost_attr_groups[];
 146
 147 /* scsi_netlink.c */
 148 #ifdef CONFIG_SCSI_NETLINK
 149 extern void scsi_netlink_init(void);
 150 extern void scsi_netlink_exit(void);
 151 extern struct sock *scsi_nl_sock;
 152 #else
 153 static inline void scsi_netlink_init(void) {}
 154 static inline void scsi_netlink_exit(void) {}
 155 #endif
 156
 157 /* scsi_pm.c */
 158 #ifdef CONFIG_PM
 159 extern const struct dev_pm_ops scsi_bus_pm_ops;
 160
 161 extern void scsi_autopm_get_target(struct scsi_target *);
 162 extern void scsi_autopm_put_target(struct scsi_target *);
 163 extern int scsi_autopm_get_host(struct Scsi_Host *);
 164 extern void scsi_autopm_put_host(struct Scsi_Host *);
 165 #else
 166 static inline void scsi_autopm_get_target(struct scsi_target *t) {}
 167 static inline void scsi_autopm_put_target(struct scsi_target *t) {}
 168 static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; }
 169 static inline void scsi_autopm_put_host(struct Scsi_Host *h) {}
 170 #endif /* CONFIG_PM */
 171
 172 extern struct async_domain scsi_sd_pm_domain;
 173 extern struct async_domain scsi_sd_probe_domain;
 174
 175 /* scsi_dh.c */
 176 #ifdef CONFIG_SCSI_DH
 177 int scsi_dh_add_device(struct scsi_device *sdev);
 178 void scsi_dh_release_device(struct scsi_device *sdev);
 179 #else
 180 static inline int scsi_dh_add_device(struct scsi_device *sdev) { return 0; }
 181 static inline void scsi_dh_release_device(struct scsi_device *sdev) { }
 182 #endif
 183 static inline void scsi_dh_remove_device(struct scsi_device *sdev) { }
 184
 185 /*
 186  * internal scsi timeout functions: for use by mid-layer and transport
 187  * classes.
 188  */
 189
 190 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT   600     /* units in seconds */
 191 extern int scsi_internal_device_block(struct scsi_device *sdev);
 192 extern int scsi_internal_device_unblock(struct scsi_device *sdev,
 193                                         enum scsi_device_state new_state);
 194
 195 #endif /* _SCSI_PRIV_H */