scsi_device(9S)

NAME

scsi_device − SCSI device structure

SYNOPSIS

#include <sys/scsi/scsi.h>

INTERFACE LEVEL

Solaris DDI specific (Solaris 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. The host adapter driver initializes part of this structure prior to probe(9E) and destroys this structure after a probe failure or successful detach(9E).

STRUCTURE MEMBERS

struct scsi_address	sd_address;	/∗ Routing information ∗/
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;	/∗ Optional request sense buffer ptr ∗/
caddr_t	sd_private;	/∗ Target drivers private data ∗/

sd_address contains the routing information that the target driver normally copies into a scsi_pkt(9S) structure using the collection of makecom(9F) functions. The SCSA library routines use this information to determine which host adapter, SCSI bus, and target/lun a command is intended for. This structure is initialized by the host adapter driver.

sd_dev is a pointer to the corresponding dev_info structure. This pointer is initialized by the host adapter driver.

sd_mutex is a mutual exclusion lock for this device. It is used to serialize access to a device. The host adapter driver initializes this mutex. See mutex(9F).

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

sd_sense is initially NULL (zero). If the target driver wants to use this field for storing REQUEST SENSE data, it should allocate an scsi_extended_sense(9S) buffer and set this field to the address of this buffer.

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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