'\" te
.\"  Copyright (c) 2006, Sun Microsystems, Inc. , All Rights Reserved
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.TH SCSI_SETUP_CDB 9F "Jan 16, 2006"
.SH NAME
scsi_setup_cdb \- setup SCSI command descriptor block (CDB)
.SH SYNOPSIS
.nf
\fBint\fR \fBscsi_setup_cdb\fR(\fBunion scsi_cdb\fR \fI*cdbp\fR, \fBuchar_t\fR \fIcmd\fR, \fBuint_t\fR \fIaddr\fR,
     \fBuint_t\fR \fIcnt\fR, \fBuint_t\fR \fIothr_cdb_data\fR);
.fi

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH PARAMETERS
.ne 2
.na
\fB\fIcdbp\fR\fR
.ad
.RS 17n
Pointer to command descriptor block.
.RE

.sp
.ne 2
.na
\fB\fIcmd\fR\fR
.ad
.RS 17n
The first byte of the \fBSCSI\fR group 0, 1, 2, 4, or 5 \fBCDB\fR.
.RE

.sp
.ne 2
.na
\fB\fIaddr\fR\fR
.ad
.RS 17n
Pointer to the location of the data.
.RE

.sp
.ne 2
.na
\fB\fIcnt\fR\fR
.ad
.RS 17n
Data transfer length in units defined by the SCSI device type. For sequential
devices \fIcnt\fR is the number of bytes. For block devices, \fIcnt\fR is the
number of blocks.
.RE

.sp
.ne 2
.na
\fB\fIothr_cdb_data\fR\fR
.ad
.RS 17n
Additional \fBCDB\fR data.
.RE

.SH DESCRIPTION
The \fBscsi_setup_cdb()\fR function initializes a group 0, 1, 2, 4, or 5 type
of command descriptor block pointed to by  \fIcdbp\fR using \fIcmd\fR,
\fIaddr\fR, \fIcnt\fR, \fIothr_cdb_data\fR.
.sp
.LP
\fIaddr\fR should be set to 0 for commands having no addressing information
(for example, group 0 READ command for sequential access devices).
\fIothr_cdb_data\fR should be additional \fBCDB\fR data for Group 4 commands;
otherwise, it should be set to 0.
.sp
.LP
The \fBscsi_setup_cdb()\fR function does not set the \fBLUN\fR bits in
\fBCDB\fR[1] as the  \fBmakecom\fR(9F) functions do.  Also, the fixed bit for
sequential access device commands is not set.
.SH RETURN VALUES
The \fBscsi_setup_cdb()\fR function returns:
.sp
.ne 2
.na
\fB\fB1\fR\fR
.ad
.RS 5n
Upon success.
.RE

.sp
.ne 2
.na
\fB\fB0\fR\fR
.ad
.RS 5n
Upon failure.
.RE

.SH CONTEXT
These functions can be called from a user, interrupt, or kernel context.
.SH SEE ALSO
.BR makecom (9F),
.BR scsi_pkt (9S)
.sp
.LP
\fIWriting Device Drivers\fR
.sp
.LP
\fIAmerican National Standard Small Computer System Interface-2 (SCSI-2)\fR
.sp
.LP
\fIAmerican National Standard SCSI-3 Primary Commands (SPC)\fR