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scsi_device(9s)

scsi_device(9S)         Kernel & Driver Data Structures        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 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 info. */
         dev_info_t                 *sd_dev;    /* Cross-ref. to */
                                                /* dev_info_t */
         kmutex_t                   sd_mutex;   /* Mutex for this dev. */
         struct scsi_inquiry        *sd_inq;    /* scsi_inquiry data struc. */
         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 se‐
       rialize 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 ALSO
       detach(9E), probe(9E), makecom(9F), mutex(9F), scsi_probe(9F), scsi_ex‐
       tended_sense(9S), scsi_pkt(9S)


       Writing Device Drivers in Oracle Solaris 11.4

Oracle Solaris 11.4               19 Feb 1993                  scsi_device(9S)
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