man/man9f/scsi_setup_cdb.9f

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 SCSI_SETUP_CDB 9F "Jan 16, 2006"
 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
illumos DDI specific (illumos 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)