'\" te
.\"  Copyright (c) 2007, 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 bp_copyin 9F "16 Oct 2007" "SunOS 5.11" "Kernel Functions for Drivers"
.SH NAME
bp_copyin \- copy from a buf(9S) into a driver buffer
.SH SYNOPSIS
.LP
.nf
#include <sys/types.h>
#include <sys/buf.h>




\fBint\fR \fBbp_copyin\fR(\fBstruct buf *\fR\fIbp\fR, \fBvoid *\fR\fIdriverbuf\fR, \fBoffset_t\fR \fIoffset\fR, 
     \fBsize_t\fR \fIsize\fR);
.fi

.SH INTERFACE LEVEL
.sp
.LP
Architecture independent level 1 (DDI/DKI).
.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIbp\fR\fR
.ad
.RS 13n
.rt  
Pointer to the buffer header structure to copy from.
.RE

.sp
.ne 2
.mk
.na
\fB\fIdriverbuf\fR\fR
.ad
.RS 13n
.rt  
Driver buffer to copy to.
.RE

.sp
.ne 2
.mk
.na
\fB\fIoffset\fR\fR
.ad
.RS 13n
.rt  
Offset into \fIbp\fR where to start copying.
.RE

.sp
.ne 2
.mk
.na
\fB\fIsize\fR\fR
.ad
.RS 13n
.rt  
Size of copy.
.RE

.SH DESCRIPTION
.sp
.LP
The \fBbp_copyin()\fR function copies \fIsize\fR bytes into the memory
associated with \fIbp\fR to the destination driver buffer \fIdriverbuf\fR. The
\fIoffset\fR only applies to \fIbp\fR.
.SH RETURN VALUES
.sp
.LP
Under normal conditions, 0 is returned to indicate a successful copy.
Otherwise, -1 is returned if \fIbp\fR references invalid pages.
.SH CONTEXT
.sp
.LP
The \fBbp_copyin()\fR function can be called from user or kernel context only.
.SH SEE ALSO
.sp
.LP
\fBbp_copyout\fR(9F), \fBbp_mapin\fR(9F), \fBbp_mapout\fR(9F),
\fBddi_copyout\fR(9F), \fBbuf\fR(9S)