drivers/scsi/scsi_priv.h

   1 #ifndef _SCSI_PRIV_H
   2 #define _SCSI_PRIV_H
   3
   4 #include <linux/config.h>
   5 #include <linux/device.h>
   6
   7 struct request_queue;
   8 struct scsi_cmnd;
   9 struct scsi_device;
  10 struct scsi_host_template;
  11 struct scsi_request;
  12 struct Scsi_Host;
  13
  14
  15 /*
  16  * Magic values for certain scsi structs. Shouldn't ever be used.
  17  */
  18 #define SCSI_CMND_MAGIC         0xE25C23A5
  19 #define SCSI_REQ_MAGIC          0x75F6D354
  20
  21 /*
  22  * Scsi Error Handler Flags
  23  */
  24 #define SCSI_EH_CANCEL_CMD      0x0001  /* Cancel this cmd */
  25
  26 #define SCSI_SENSE_VALID(scmd) \
  27         (((scmd)->sense_buffer[0] & 0x70) == 0x70)
  28
  29 /* hosts.c */
  30 extern int scsi_init_hosts(void);
  31 extern void scsi_exit_hosts(void);
  32
  33 /* scsi.c */
  34 extern int scsi_dispatch_cmd(struct scsi_cmnd *cmd);
  35 extern int scsi_setup_command_freelist(struct Scsi_Host *shost);
  36 extern void scsi_destroy_command_freelist(struct Scsi_Host *shost);
  37 extern void scsi_init_cmd_from_req(struct scsi_cmnd *cmd,
  38                 struct scsi_request *sreq);
  39 extern void __scsi_release_request(struct scsi_request *sreq);
  40 extern void __scsi_done(struct scsi_cmnd *cmd);
  41 extern int scsi_retry_command(struct scsi_cmnd *cmd);
  42 #ifdef CONFIG_SCSI_LOGGING
  43 void scsi_log_send(struct scsi_cmnd *cmd);
  44 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
  45 #else
  46 static inline void scsi_log_send(struct scsi_cmnd *cmd)
  47         { };
  48 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
  49         { };
  50 #endif
  51
  52 /* scsi_devinfo.c */
  53 extern int scsi_get_device_flags(struct scsi_device *sdev,
  54                                  const unsigned char *vendor,
  55                                  const unsigned char *model);
  56 extern int __init scsi_init_devinfo(void);
  57 extern void scsi_exit_devinfo(void);
  58
  59 /* scsi_error.c */
  60 extern void scsi_add_timer(struct scsi_cmnd *, int,
  61                 void (*)(struct scsi_cmnd *));
  62 extern int scsi_delete_timer(struct scsi_cmnd *);
  63 extern void scsi_times_out(struct scsi_cmnd *cmd);
  64 extern int scsi_error_handler(void *host);
  65 extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
  66 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
  67 extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
  68
  69 /* scsi_lib.c */
  70 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
  71 extern void scsi_setup_cmd_retry(struct scsi_cmnd *cmd);
  72 extern void scsi_device_unbusy(struct scsi_device *sdev);
  73 extern int scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
  74 extern void scsi_next_command(struct scsi_cmnd *cmd);
  75 extern void scsi_run_host_queues(struct Scsi_Host *shost);
  76 extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
  77 extern void scsi_free_queue(struct request_queue *q);
  78 extern int scsi_init_queue(void);
  79 extern void scsi_exit_queue(void);
  80
  81 /* scsi_proc.c */
  82 #ifdef CONFIG_SCSI_PROC_FS
  83 extern void scsi_proc_hostdir_add(struct scsi_host_template *);
  84 extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
  85 extern void scsi_proc_host_add(struct Scsi_Host *);
  86 extern void scsi_proc_host_rm(struct Scsi_Host *);
  87 extern int scsi_init_procfs(void);
  88 extern void scsi_exit_procfs(void);
  89 #else
  90 # define scsi_proc_hostdir_add(sht)     do { } while (0)
  91 # define scsi_proc_hostdir_rm(sht)      do { } while (0)
  92 # define scsi_proc_host_add(shost)      do { } while (0)
  93 # define scsi_proc_host_rm(shost)       do { } while (0)
  94 # define scsi_init_procfs()             (0)
  95 # define scsi_exit_procfs()             do { } while (0)
  96 #endif /* CONFIG_PROC_FS */
  97
  98 /* scsi_scan.c */
  99 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
 100                                    unsigned int, unsigned int, int);
 101 extern void scsi_forget_host(struct Scsi_Host *);
 102 extern void scsi_rescan_device(struct device *);
 103
 104 /* scsi_sysctl.c */
 105 #ifdef CONFIG_SYSCTL
 106 extern int scsi_init_sysctl(void);
 107 extern void scsi_exit_sysctl(void);
 108 #else
 109 # define scsi_init_sysctl()             (0)
 110 # define scsi_exit_sysctl()             do { } while (0)
 111 #endif /* CONFIG_SYSCTL */
 112
 113 /* scsi_sysfs.c */
 114 extern int scsi_sysfs_add_sdev(struct scsi_device *);
 115 extern int scsi_sysfs_add_host(struct Scsi_Host *);
 116 extern int scsi_sysfs_register(void);
 117 extern void scsi_sysfs_unregister(void);
 118 extern void scsi_sysfs_device_initialize(struct scsi_device *);
 119 extern int scsi_sysfs_target_initialize(struct scsi_device *);
 120 extern struct scsi_transport_template blank_transport_template;
 121 extern void __scsi_remove_device(struct scsi_device *);
 122
 123 extern struct bus_type scsi_bus_type;
 124
 125 /*
 126  * internal scsi timeout functions: for use by mid-layer and transport
 127  * classes.
 128  */
 129
 130 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT   (HZ*60)
 131 extern int scsi_internal_device_block(struct scsi_device *sdev);
 132 extern int scsi_internal_device_unblock(struct scsi_device *sdev);
 133
 134 #endif /* _SCSI_PRIV_H */