diff options
Diffstat (limited to 'drivers/scsi/scsi_priv.h')
| -rw-r--r-- | drivers/scsi/scsi_priv.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h new file mode 100644 index 000000000000..aca3b39fe710 --- /dev/null +++ b/drivers/scsi/scsi_priv.h @@ -0,0 +1,165 @@ +#ifndef _SCSI_PRIV_H +#define _SCSI_PRIV_H + +#include <linux/config.h> +#include <linux/device.h> + +struct request_queue; +struct scsi_cmnd; +struct scsi_device; +struct scsi_host_template; +struct scsi_request; +struct Scsi_Host; + + +/* + * These are the values that the owner field can take. + * They are used as an indication of who the command belongs to. + */ +#define SCSI_OWNER_HIGHLEVEL 0x100 +#define SCSI_OWNER_MIDLEVEL 0x101 +#define SCSI_OWNER_LOWLEVEL 0x102 +#define SCSI_OWNER_ERROR_HANDLER 0x103 +#define SCSI_OWNER_BH_HANDLER 0x104 +#define SCSI_OWNER_NOBODY 0x105 + +/* + * Magic values for certain scsi structs. Shouldn't ever be used. + */ +#define SCSI_CMND_MAGIC 0xE25C23A5 +#define SCSI_REQ_MAGIC 0x75F6D354 + +/* + * Flag bit for the internal_timeout array + */ +#define NORMAL_TIMEOUT 0 + +/* + * Scsi Error Handler Flags + */ +#define scsi_eh_eflags_chk(scp, flags) \ + ((scp)->eh_eflags & (flags)) +#define scsi_eh_eflags_set(scp, flags) \ + do { (scp)->eh_eflags |= (flags); } while(0) +#define scsi_eh_eflags_clr(scp, flags) \ + do { (scp)->eh_eflags &= ~(flags); } while(0) +#define scsi_eh_eflags_clr_all(scp) \ + (scp->eh_eflags = 0) + +#define SCSI_EH_CANCEL_CMD 0x0001 /* Cancel this cmd */ +#define SCSI_EH_REC_TIMEOUT 0x0002 /* EH retry timed out */ + +#define SCSI_SENSE_VALID(scmd) \ + (((scmd)->sense_buffer[0] & 0x70) == 0x70) + +/* + * Special value for scanning to specify scanning or rescanning of all + * possible channels, (target) ids, or luns on a given shost. + */ +#define SCAN_WILD_CARD ~0 + +/* hosts.c */ +extern int scsi_init_hosts(void); +extern void scsi_exit_hosts(void); + +/* scsi.c */ +extern int scsi_dispatch_cmd(struct scsi_cmnd *cmd); +extern int scsi_setup_command_freelist(struct Scsi_Host *shost); +extern void scsi_destroy_command_freelist(struct Scsi_Host *shost); +extern void scsi_done(struct scsi_cmnd *cmd); +extern int scsi_retry_command(struct scsi_cmnd *cmd); +extern int scsi_insert_special_req(struct scsi_request *sreq, int); +extern void scsi_init_cmd_from_req(struct scsi_cmnd *cmd, + struct scsi_request *sreq); +extern void __scsi_release_request(struct scsi_request *sreq); +extern void __scsi_done(struct scsi_cmnd *cmd); +#ifdef CONFIG_SCSI_LOGGING +void scsi_log_send(struct scsi_cmnd *cmd); +void scsi_log_completion(struct scsi_cmnd *cmd, int disposition); +#else +static inline void scsi_log_send(struct scsi_cmnd *cmd) + { }; +static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition) + { }; +#endif + +/* scsi_devinfo.c */ +extern int scsi_get_device_flags(struct scsi_device *sdev, + unsigned char *vendor, unsigned char *model); +extern int __init scsi_init_devinfo(void); +extern void scsi_exit_devinfo(void); + +/* scsi_error.c */ +extern void scsi_times_out(struct scsi_cmnd *cmd); +extern int scsi_error_handler(void *host); +extern int scsi_decide_disposition(struct scsi_cmnd *cmd); +extern void scsi_eh_wakeup(struct Scsi_Host *shost); +extern int scsi_eh_scmd_add(struct scsi_cmnd *, int); + +/* scsi_lib.c */ +extern int scsi_maybe_unblock_host(struct scsi_device *sdev); +extern void scsi_setup_cmd_retry(struct scsi_cmnd *cmd); +extern void scsi_device_unbusy(struct scsi_device *sdev); +extern int scsi_queue_insert(struct scsi_cmnd *cmd, int reason); +extern void scsi_next_command(struct scsi_cmnd *cmd); +extern void scsi_run_host_queues(struct Scsi_Host *shost); +extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev); +extern void scsi_free_queue(struct request_queue *q); +extern int scsi_init_queue(void); +extern void scsi_exit_queue(void); + +/* scsi_proc.c */ +#ifdef CONFIG_SCSI_PROC_FS +extern void scsi_proc_hostdir_add(struct scsi_host_template *); +extern void scsi_proc_hostdir_rm(struct scsi_host_template *); +extern void scsi_proc_host_add(struct Scsi_Host *); +extern void scsi_proc_host_rm(struct Scsi_Host *); +extern int scsi_init_procfs(void); +extern void scsi_exit_procfs(void); +#else +# define scsi_proc_hostdir_add(sht) do { } while (0) +# define scsi_proc_hostdir_rm(sht) do { } while (0) +# define scsi_proc_host_add(shost) do { } while (0) +# define scsi_proc_host_rm(shost) do { } while (0) +# define scsi_init_procfs() (0) +# define scsi_exit_procfs() do { } while (0) +#endif /* CONFIG_PROC_FS */ + +/* scsi_scan.c */ +extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int, + unsigned int, unsigned int, int); +extern void scsi_forget_host(struct Scsi_Host *); +extern void scsi_rescan_device(struct device *); + +/* scsi_sysctl.c */ +#ifdef CONFIG_SYSCTL +extern int scsi_init_sysctl(void); +extern void scsi_exit_sysctl(void); +#else +# define scsi_init_sysctl() (0) +# define scsi_exit_sysctl() do { } while (0) +#endif /* CONFIG_SYSCTL */ + +/* scsi_sysfs.c */ +extern void scsi_device_dev_release(struct device *); +extern int scsi_sysfs_add_sdev(struct scsi_device *); +extern int scsi_sysfs_add_host(struct Scsi_Host *); +extern int scsi_sysfs_register(void); +extern void scsi_sysfs_unregister(void); +extern void scsi_sysfs_device_initialize(struct scsi_device *); +extern int scsi_sysfs_target_initialize(struct scsi_device *); +extern struct scsi_transport_template blank_transport_template; + +extern struct class sdev_class; +extern struct bus_type scsi_bus_type; + +/* + * internal scsi timeout functions: for use by mid-layer and transport + * classes. + */ + +#define SCSI_DEVICE_BLOCK_MAX_TIMEOUT (HZ*60) +extern int scsi_internal_device_block(struct scsi_device *sdev); +extern int scsi_internal_device_unblock(struct scsi_device *sdev); + +#endif /* _SCSI_PRIV_H */ |