scsi_device(9S) Data Structures for Drivers scsi_device(9S)NAMEscsi_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 ini‐
tializes 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 nor‐
mally 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/logical unit num‐
ber (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 gener‐
ally be used to point to target specific data structures.
SEE ALSOdetach(9E), probe(9E), makecom(9F), mutex(9F), scsi_probe(9F),
scsi_extended_sense(9S), scsi_pkt(9S)
Writing Device Drivers
SunOS 5.10 19 Feb 1993 scsi_device(9S)
