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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_addresssd_address;/* Routing information */
dev_info_t*sd_dev;/* Cross-reference to our dev_info_t */
kmutex_tsd_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_tsd_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.

See Also

detach(9E) , probe(9E) , makecom(9F) , mutex(9F) , scsi_probe(9F) , scsi_extended_sense(9S) , scsi_pkt(9S)


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