'\" te
.\"  Copyright (c) 2006 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_GET_DRIVER_PRIVATE 9F "Jan 16, 2006"
.SH NAME
ddi_get_driver_private, ddi_set_driver_private \- get or set the address of the
device's private data area
.SH SYNOPSIS
.LP
.nf
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>



\fBvoid\fR \fBddi_set_driver_private\fR(\fBdev_info_t *\fR\fIdip\fR, \fBvoid\fR *\fIdata\fR);
.fi

.LP
.nf
\fBvoid\fR *\fBddi_get_driver_private\fR(\fBdev_info_t *\fR\fIdip\fR);
.fi

.SH INTERFACE LEVEL
.sp
.LP
Solaris DDI specific (Solaris DDI).
.SH PARAMETERS
.sp
.LP
\fBddi_get_driver_private()\fR
.sp
.ne 2
.na
\fB\fIdip\fR\fR
.ad
.RS 7n
Pointer to device information  structure to get from.
.RE

.sp
.LP
\fBddi_set_driver_private()\fR
.sp
.ne 2
.na
\fB\fIdip\fR\fR
.ad
.RS 8n
Pointer to device information structure to set.
.RE

.sp
.ne 2
.na
\fB\fIdata\fR\fR
.ad
.RS 8n
Data area address to set.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBddi_get_driver_private()\fR function returns the address of the device's
private data area from the device information structure pointed to by
\fIdip\fR.
.sp
.LP
The \fBddi_set_driver_private()\fR function sets the address of the device's
private data area in the device information structure pointed to by \fIdip\fR
with the value of \fIdata\fR.
.SH RETURN VALUES
.sp
.LP
The \fBddi_get_driver_private()\fR function returns the contents of
\fBdevi_driver_data\fR. If \fBddi_set_driver_private()\fR has not been
previously called with \fIdip\fR, an unpredictable value is returned.
.SH CONTEXT
.sp
.LP
These functions can be called from user , interrupt, or kernel context.
.SH SEE ALSO
.sp
.LP
\fIWriting Device Drivers\fR