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  * These are the values that the owner field can take.
  17  * They are used as an indication of who the command belongs to.
  18  */
  19 #define SCSI_OWNER_HIGHLEVEL      0x100
  20 #define SCSI_OWNER_MIDLEVEL       0x101
  21 #define SCSI_OWNER_LOWLEVEL       0x102
  22 #define SCSI_OWNER_ERROR_HANDLER  0x103
  23 #define SCSI_OWNER_BH_HANDLER     0x104
  24 #define SCSI_OWNER_NOBODY         0x105
  25
  26 /*
  27  * Magic values for certain scsi structs. Shouldn't ever be used.
  28  */
  29 #define SCSI_CMND_MAGIC         0xE25C23A5
  30 #define SCSI_REQ_MAGIC          0x75F6D354
  31
  32 /*
  33  *  Flag bit for the internal_timeout array
  34  */
  35 #define NORMAL_TIMEOUT          0
  36
  37 /*
  38  * Scsi Error Handler Flags
  39  */
  40 #define scsi_eh_eflags_chk(scp, flags) \
  41         ((scp)->eh_eflags & (flags))
  42 #define scsi_eh_eflags_set(scp, flags) \
  43         do { (scp)->eh_eflags |= (flags); } while(0)
  44 #define scsi_eh_eflags_clr(scp, flags) \
  45         do { (scp)->eh_eflags &= ~(flags); } while(0)
  46 #define scsi_eh_eflags_clr_all(scp) \
  47         (scp->eh_eflags = 0)
  48
  49 #define SCSI_EH_CANCEL_CMD      0x0001  /* Cancel this cmd */
  50 #define SCSI_EH_REC_TIMEOUT     0x0002  /* EH retry timed out */
  51
  52 #define SCSI_SENSE_VALID(scmd) \
  53         (((scmd)->sense_buffer[0] & 0x70) == 0x70)
  54
  55 /*
  56  * Special value for scanning to specify scanning or rescanning of all
  57  * possible channels, (target) ids, or luns on a given shost.
  58  */
  59 #define SCAN_WILD_CARD  ~0
  60
  61 /*
  62  * scsi_target: representation of a scsi target, for now, this is only
  63  * used for single_lun devices. If no one has active IO to the target,
  64  * starget_sdev_user is NULL, else it points to the active sdev.
  65  */
  66 struct scsi_target {
  67         struct scsi_device      *starget_sdev_user;
  68         unsigned int            starget_refcnt;
  69 };
  70
  71 /* hosts.c */
  72 extern int scsi_init_hosts(void);
  73 extern void scsi_exit_hosts(void);
  74
  75 /* scsi.c */
  76 extern int scsi_dispatch_cmd(struct scsi_cmnd *cmd);
  77 extern int scsi_setup_command_freelist(struct Scsi_Host *shost);
  78 extern void scsi_destroy_command_freelist(struct Scsi_Host *shost);
  79 extern void scsi_done(struct scsi_cmnd *cmd);
  80 extern int scsi_retry_command(struct scsi_cmnd *cmd);
  81 extern int scsi_insert_special_req(struct scsi_request *sreq, int);
  82 extern void scsi_init_cmd_from_req(struct scsi_cmnd *cmd,
  83                 struct scsi_request *sreq);
  84 extern void __scsi_release_request(struct scsi_request *sreq);
  85 extern void __scsi_done(struct scsi_cmnd *cmd);
  86 #ifdef CONFIG_SCSI_LOGGING
  87 void scsi_log_send(struct scsi_cmnd *cmd);
  88 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
  89 #else
  90 static inline void scsi_log_send(struct scsi_cmnd *cmd)
  91         { };
  92 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
  93         { };
  94 #endif
  95
  96 /* scsi_devinfo.c */
  97 extern int scsi_get_device_flags(struct scsi_device *sdev,
  98                                  unsigned char *vendor, unsigned char *model);
  99 extern int scsi_init_devinfo(void);
 100 extern void scsi_exit_devinfo(void);
 101
 102 /* scsi_error.c */
 103 extern void scsi_times_out(struct scsi_cmnd *cmd);
 104 extern int scsi_error_handler(void *host);
 105 extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
 106 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
 107 extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
 108
 109 /* scsi_lib.c */
 110 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
 111 extern void scsi_setup_cmd_retry(struct scsi_cmnd *cmd);
 112 extern void scsi_device_unbusy(struct scsi_device *sdev);
 113 extern int scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
 114 extern void scsi_next_command(struct scsi_cmnd *cmd);
 115 extern void scsi_run_host_queues(struct Scsi_Host *shost);
 116 extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
 117 extern void scsi_free_queue(struct request_queue *q);
 118 extern int scsi_init_queue(void);
 119 extern void scsi_exit_queue(void);
 120
 121 /* scsi_proc.c */
 122 #ifdef CONFIG_SCSI_PROC_FS
 123 extern void scsi_proc_hostdir_add(struct scsi_host_template *);
 124 extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
 125 extern void scsi_proc_host_add(struct Scsi_Host *);
 126 extern void scsi_proc_host_rm(struct Scsi_Host *);
 127 extern int scsi_init_procfs(void);
 128 extern void scsi_exit_procfs(void);
 129 #else
 130 # define scsi_proc_hostdir_add(sht)     do { } while (0)
 131 # define scsi_proc_hostdir_rm(sht)      do { } while (0)
 132 # define scsi_proc_host_add(shost)      do { } while (0)
 133 # define scsi_proc_host_rm(shost)       do { } while (0)
 134 # define scsi_init_procfs()             (0)
 135 # define scsi_exit_procfs()             do { } while (0)
 136 #endif /* CONFIG_PROC_FS */
 137
 138 /* scsi_scan.c */
 139 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
 140                                    unsigned int, unsigned int, int);
 141 extern void scsi_forget_host(struct Scsi_Host *);
 142 extern void scsi_rescan_device(struct device *);
 143
 144 /* scsi_sysctl.c */
 145 #ifdef CONFIG_SYSCTL
 146 extern int scsi_init_sysctl(void);
 147 extern void scsi_exit_sysctl(void);
 148 #else
 149 # define scsi_init_sysctl()             (0)
 150 # define scsi_exit_sysctl()             do { } while (0)
 151 #endif /* CONFIG_SYSCTL */
 152
 153 /* scsi_sysfs.c */
 154 extern void scsi_device_dev_release(struct device *);
 155 extern int scsi_sysfs_add_sdev(struct scsi_device *);
 156 extern int scsi_sysfs_add_host(struct Scsi_Host *);
 157 extern int scsi_sysfs_register(void);
 158 extern void scsi_sysfs_unregister(void);
 159 extern struct scsi_transport_template blank_transport_template;
 160
 161 extern struct class sdev_class;
 162 extern struct bus_type scsi_bus_type;
 163
 164 #endif /* _SCSI_PRIV_H */