'\" te
.\" Copyright (c) 2002, Sun Microsystems, Inc. All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH ddi_driver_major 9F "18 Jun 2001" "SunOS 5.11" "Kernel Functions for Drivers"
.SH NAME
ddi_driver_major \- return driver's major device number
.SH SYNOPSIS
.LP
.nf
#include <sys/ddi.h>
#include <sys/sunddi.h>

\fBmajor_t\fR \fBddi_driver_major\fR(\fBdev_info_t *\fR\fIdip\fR);
.fi

.SH INTERFACE LEVEL
.sp
.LP
Solaris DDI specific (Solaris DDI)
.SH DESCRIPTION
.sp
.LP
\fBddi_driver_major()\fR returns the major device number for the driver
associated with the supplied \fBdev_info node\fR. This value can then be used
as an argument to \fBmakedevice\fR(9F) to construct a complete \fBdev_t\fR.
.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIdip\fR\fR
.ad
.RS 7n
.rt  
A pointer to the device's \fBdev_info\fR structure.
.RE

.SH RETURN VALUES
.sp
.LP
\fBddi_driver_major()\fR returns the major number of the driver bound to a
device, if any, or \fBDDI_MAJOR_T_NONE\fR otherwise.
.SH CONTEXT
.sp
.LP
\fBddi_driver_major()\fR can be called from kernel or interrupt context.
.SH SEE ALSO
.sp
.LP
\fBddi_driver_name\fR(9F)
.sp
.LP
\fIWriting Device Drivers\fR