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)

SunOS 5.11							    16 Jan 2006 						scsi_setup_cdb(9F)