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 /* hosts.c */
  62 extern int scsi_init_hosts(void);
  63 extern void scsi_exit_hosts(void);
  64
  65 /* scsi.c */
  66 extern int scsi_dispatch_cmd(struct scsi_cmnd *cmd);
  67 extern int scsi_setup_command_freelist(struct Scsi_Host *shost);
  68 extern void scsi_destroy_command_freelist(struct Scsi_Host *shost);
  69 extern void scsi_done(struct scsi_cmnd *cmd);
  70 extern int scsi_retry_command(struct scsi_cmnd *cmd);
  71 extern int scsi_insert_special_req(struct scsi_request *sreq, int);
  72 extern void scsi_init_cmd_from_req(struct scsi_cmnd *cmd,
  73                 struct scsi_request *sreq);
  74 extern void __scsi_release_request(struct scsi_request *sreq);
  75 extern void __scsi_done(struct scsi_cmnd *cmd);
  76 #ifdef CONFIG_SCSI_LOGGING
  77 void scsi_log_send(struct scsi_cmnd *cmd);
  78 void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
  79 #else
  80 static inline void scsi_log_send(struct scsi_cmnd *cmd)
  81         { };
  82 static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
  83         { };
  84 #endif
  85
  86 /* scsi_devinfo.c */
  87 extern int scsi_get_device_flags(struct scsi_device *sdev,
  88                                  unsigned char *vendor, unsigned char *model);
  89 extern int __init scsi_init_devinfo(void);
  90 extern void scsi_exit_devinfo(void);
  91
  92 /* scsi_error.c */
  93 extern void scsi_times_out(struct scsi_cmnd *cmd);
  94 extern int scsi_error_handler(void *host);
  95 extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
  96 extern void scsi_eh_wakeup(struct Scsi_Host *shost);
  97 extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
  98
  99 /* scsi_lib.c */
 100 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
 101 extern void scsi_setup_cmd_retry(struct scsi_cmnd *cmd);
 102 extern void scsi_device_unbusy(struct scsi_device *sdev);
 103 extern int scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
 104 extern void scsi_next_command(struct scsi_cmnd *cmd);
 105 extern void scsi_run_host_queues(struct Scsi_Host *shost);
 106 extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
 107 extern void scsi_free_queue(struct request_queue *q);
 108 extern int scsi_init_queue(void);
 109 extern void scsi_exit_queue(void);
 110
 111 /* scsi_proc.c */
 112 #ifdef CONFIG_SCSI_PROC_FS
 113 extern void scsi_proc_hostdir_add(struct scsi_host_template *);
 114 extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
 115 extern void scsi_proc_host_add(struct Scsi_Host *);
 116 extern void scsi_proc_host_rm(struct Scsi_Host *);
 117 extern int scsi_init_procfs(void);
 118 extern void scsi_exit_procfs(void);
 119 #else
 120 # define scsi_proc_hostdir_add(sht)     do { } while (0)
 121 # define scsi_proc_hostdir_rm(sht)      do { } while (0)
 122 # define scsi_proc_host_add(shost)      do { } while (0)
 123 # define scsi_proc_host_rm(shost)       do { } while (0)
 124 # define scsi_init_procfs()             (0)
 125 # define scsi_exit_procfs()             do { } while (0)
 126 #endif /* CONFIG_PROC_FS */
 127
 128 /* scsi_scan.c */
 129 extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
 130                                    unsigned int, unsigned int, int);
 131 extern void scsi_forget_host(struct Scsi_Host *);
 132 extern void scsi_rescan_device(struct device *);
 133
 134 /* scsi_sysctl.c */
 135 #ifdef CONFIG_SYSCTL
 136 extern int scsi_init_sysctl(void);
 137 extern void scsi_exit_sysctl(void);
 138 #else
 139 # define scsi_init_sysctl()             (0)
 140 # define scsi_exit_sysctl()             do { } while (0)
 141 #endif /* CONFIG_SYSCTL */
 142
 143 /* scsi_sysfs.c */
 144 extern void scsi_device_dev_release(struct device *);
 145 extern int scsi_sysfs_add_sdev(struct scsi_device *);
 146 extern int scsi_sysfs_add_host(struct Scsi_Host *);
 147 extern int scsi_sysfs_register(void);
 148 extern void scsi_sysfs_unregister(void);
 149 extern void scsi_sysfs_device_initialize(struct scsi_device *);
 150 extern int scsi_sysfs_target_initialize(struct scsi_device *);
 151 extern struct scsi_transport_template blank_transport_template;
 152
 153 extern struct class sdev_class;
 154 extern struct bus_type scsi_bus_type;
 155
 156 /*
 157  * internal scsi timeout functions: for use by mid-layer and transport
 158  * classes.
 159  */
 160
 161 #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT   (HZ*60)
 162 extern int scsi_internal_device_block(struct scsi_device *sdev);
 163 extern int scsi_internal_device_unblock(struct scsi_device *sdev);
 164
 165 #endif /* _SCSI_PRIV_H */