scsi_device(9S)

NAME

scsi_device − SCSI device structure

SYNOPSIS

#include <sys/scsi/scsi.h>

INTERFACE LEVEL

SPARC architecture specific (SPARC DDI).

DESCRIPTION

The scsi_device structure stores common information about each SCSI logical unit, including pointers to areas that contain both generic and device specific information. There is one scsi_device structure for each logical unit attached to the system.

STRUCTURE ELEMENTS

struct scsi_address	sd_address;	/∗ target/lun address ∗/
dev_info_t	∗sd_dev;	/∗ Cross-reference to our dev_info_t ∗/
kmutex_t	sd_mutex;	/∗ Mutex for this device ∗/
struct scsi_inquiry	∗sd_inq;	/∗ scsi_inquiry data structure ∗/
struct scsi_extended_sense	∗sd_sense;	/∗ extended request sense buffer ∗/
caddr_t	sd_private;	/∗ Target drivers private data ∗/

sd_address contains the routing information that the target driver copies into a scsi_pkt(9S) structure. The SCSA library routines use this information to determine which host adapter and SCSI bus a command is intended for.

sd_dev is a pointer to the corresponding dev_info structure.

sd_mutex is a mutual exclusion lock for this device. It is be used to serialize uccess to a device. See mutex(9F).

sd_inq is initially NULL (zero). After executing scsi_slave(9F) this field contains the inquiry data associated with the particular device.

sd_sense is initially NULL (zero). After executing a REQUEST SENSE command, this field contains the sense information associated with the particular device.

sd_private is reserved for the use of target drivers and should generally be used to point to target specific data structures.

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