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 #define SCSI_EH_REC_TIMEOUT     0x0002  /* EH retry timed out */
  26
  27 #define SCSI_SENSE_VALID(scmd) \
  28         (((scmd)->sense_buffer[0] & 0x70) == 0x70)
  29
  30 /*
  31  * Special value for scanning to specify scanning or rescanning of all
  32  * possible channels, (target) ids, or luns on a given shost.
  33  */
  34 #define SCAN_WILD_CARD  ~0
  35
  36 /* hosts.c */
  37 extern int scsi_init_hosts(void);
  38 extern void scsi_exit_hosts(void);
  39
  40 /* scsi.c */
  41 extern int scsi_dispatch_cmd(struct scsi_cmnd *cmd);
  42 extern int scsi_setup_command_freelist(struct Scsi_Host *shost);
  43 extern void scsi_destroy_command_freelist(struct Scsi_Host *shost);
  44 extern int scsi_insert_special_req(struct scsi_request *sreq, int);
  45 extern void scsi_init_cmd_from_req(struct scsi_cmnd *cmd,
  46                 struct scsi_request *sreq);
  47 extern void __scsi_release_request(struct scsi_request *sreq);
  48 extern void __scsi_done(struct scsi_cmnd *cmd);
  49 #ifdef CONFIG_SCSI_LOGGING
  50 void scsi_log_send(struct scsi_cmnd *cmd);
  51 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
  52 #else
  53 static inline void scsi_log_send(struct scsi_cmnd *cmd)
  54         { };
  55 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
  56         { };
  57 #endif
  58
  59 /* scsi_devinfo.c */
  60 extern int scsi_get_device_flags(struct scsi_device *sdev,
  61                                  unsigned char *vendor, unsigned char *model);
  62 extern int __init scsi_init_devinfo(void);
  63 extern void scsi_exit_devinfo(void);
  64
  65 /* scsi_error.c */
  66 extern void scsi_add_timer(struct scsi_cmnd *, int,
  67                 void (*)(struct scsi_cmnd *));
  68 extern int scsi_delete_timer(struct scsi_cmnd *);
  69 extern void scsi_times_out(struct scsi_cmnd *cmd);
  70 extern int scsi_error_handler(void *host);
  71 extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
  72 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
  73 extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
  74
  75 /* scsi_lib.c */
  76 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
  77 extern void scsi_setup_cmd_retry(struct scsi_cmnd *cmd);
  78 extern void scsi_device_unbusy(struct scsi_device *sdev);
  79 extern int scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
  80 extern void scsi_next_command(struct scsi_cmnd *cmd);
  81 extern void scsi_run_host_queues(struct Scsi_Host *shost);
  82 extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
  83 extern void scsi_free_queue(struct request_queue *q);
  84 extern int scsi_init_queue(void);
  85 extern void scsi_exit_queue(void);
  86
  87 /* scsi_proc.c */
  88 #ifdef CONFIG_SCSI_PROC_FS
  89 extern void scsi_proc_hostdir_add(struct scsi_host_template *);
  90 extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
  91 extern void scsi_proc_host_add(struct Scsi_Host *);
  92 extern void scsi_proc_host_rm(struct Scsi_Host *);
  93 extern int scsi_init_procfs(void);
  94 extern void scsi_exit_procfs(void);
  95 #else
  96 # define scsi_proc_hostdir_add(sht)     do { } while (0)
  97 # define scsi_proc_hostdir_rm(sht)      do { } while (0)
  98 # define scsi_proc_host_add(shost)      do { } while (0)
  99 # define scsi_proc_host_rm(shost)       do { } while (0)
 100 # define scsi_init_procfs()             (0)
 101 # define scsi_exit_procfs()             do { } while (0)
 102 #endif /* CONFIG_PROC_FS */
 103
 104 /* scsi_scan.c */
 105 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
 106                                    unsigned int, unsigned int, int);
 107 extern void scsi_forget_host(struct Scsi_Host *);
 108 extern void scsi_rescan_device(struct device *);
 109
 110 /* scsi_sysctl.c */
 111 #ifdef CONFIG_SYSCTL
 112 extern int scsi_init_sysctl(void);
 113 extern void scsi_exit_sysctl(void);
 114 #else
 115 # define scsi_init_sysctl()             (0)
 116 # define scsi_exit_sysctl()             do { } while (0)
 117 #endif /* CONFIG_SYSCTL */
 118
 119 /* scsi_sysfs.c */
 120 extern int scsi_sysfs_add_sdev(struct scsi_device *);
 121 extern int scsi_sysfs_add_host(struct Scsi_Host *);
 122 extern int scsi_sysfs_register(void);
 123 extern void scsi_sysfs_unregister(void);
 124 extern void scsi_sysfs_device_initialize(struct scsi_device *);
 125 extern int scsi_sysfs_target_initialize(struct scsi_device *);
 126 extern struct scsi_transport_template blank_transport_template;
 127
 128 extern struct bus_type scsi_bus_type;
 129
 130 /*
 131  * internal scsi timeout functions: for use by mid-layer and transport
 132  * classes.
 133  */
 134
 135 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT   (HZ*60)
 136 extern int scsi_internal_device_block(struct scsi_device *sdev);
 137 extern int scsi_internal_device_unblock(struct scsi_device *sdev);
 138
 139 #endif /* _SCSI_PRIV_H */