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'\" te
.\" Copyright (c) 2005, 4Front Technologies 2005\&.
.TH ossddk_dmap_set_dmabuf 9ossddk "12 Sep 2005" "SunOS 5.10" "OSS DDK Services"
.SH "NAME"
ossddk_dmap_set_dmabuf \- Set the DMA buffer virtual address
.PP
.SH "SYNOPSIS"
.nf
#include <sys/soundcard.h>
.LP
#include <sys/ossddk/ossddk.h>
.fi
.LP
\fBvoid\fR ossddk_dmap_set_dmabuf(\fBdmap_t *\fIdmap\fP, \fBunsigned char *\fIbuf\fP);
.PP
.SH "INTERFACE LEVEL"
.PP
Open Sound System specific (OSS 4.0 DDK)\&.
.PP
.SH "ARGUMENTS"
.PP
.sp
.ne 2
.mk
\fB\fIdmap\fR
.in +16n
.rt
Audio buffer handle.
.in -16n
.sp
.ne 2
.mk
\fB\fIbuf\fR
.in +16n
.rt
Kernel virtual address of the DMA buffer.
.in -16n
.PP
.SH "DESCRIPTION"
.PP
If an audio driver manages the DMA buffer itself (it has the alloc_buffer and
free_buffer methods in it's callback table) it can set the DMA buffer address
using \fIossddk_dmap_set_dmabuf\fR. The buffer size can be set using
\fIossddk_dmap_set_buffsize(9ossddk)\fR.
.PP
In addition to the virtual address the driver should usually set the physical
memory/bus address too using \fIossddk_dmap_set_phys(9ossddk)\fR.
.PP
.SH "SEE ALSO"
.PP
\fIossddk_dmap_set_phys(9ossddk)\fR.
\fIossddk_dmap_set_buffsize(9ossddk)\fR.
.LP
\fIWriting Sound Device Drivers with OSS DDK\fR
.LP
\fIOpen Sound System Programmer's Guide\fR
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