SCSI_SETUP_CDB(9F) Kernel Functions for Drivers SCSI_SETUP_CDB(9F)


NAME


scsi_setup_cdb - setup SCSI command descriptor block (CDB)

SYNOPSIS


int scsi_setup_cdb(union scsi_cdb *cdbp, uchar_t cmd, uint_t addr,
uint_t cnt, uint_t othr_cdb_data);


INTERFACE LEVEL


Solaris DDI specific (Solaris DDI).

PARAMETERS


cdbp
Pointer to command descriptor block.


cmd
The first byte of the SCSI group 0, 1, 2, 4, or 5 CDB.


addr
Pointer to the location of the data.


cnt
Data transfer length in units defined by the SCSI device
type. For sequential devices cnt is the number of bytes.
For block devices, cnt is the number of blocks.


othr_cdb_data
Additional CDB data.


DESCRIPTION


The scsi_setup_cdb() function initializes a group 0, 1, 2, 4, or 5 type
of command descriptor block pointed to by cdbp using cmd, addr, cnt,
othr_cdb_data.


addr should be set to 0 for commands having no addressing information
(for example, group 0 READ command for sequential access devices).
othr_cdb_data should be additional CDB data for Group 4 commands;
otherwise, it should be set to 0.


The scsi_setup_cdb() function does not set the LUN bits in CDB[1] as the
makecom(9F) functions do. Also, the fixed bit for sequential access
device commands is not set.

RETURN VALUES


The scsi_setup_cdb() function returns:

1
Upon success.


0
Upon failure.


CONTEXT


These functions can be called from a user, interrupt, or kernel context.

SEE ALSO


makecom(9F), scsi_pkt(9S)


Writing Device Drivers


American National Standard Small Computer System Interface-2 (SCSI-2)


American National Standard SCSI-3 Primary Commands (SPC)


January 16, 2006 SCSI_SETUP_CDB(9F)