'\" te
.\" Copyright (c) 1994, Sun Microsystems, Inc.
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.TH DDI_DMA_UNBIND_HANDLE 9F "Sep 26, 1994"
.SH NAME
ddi_dma_unbind_handle \- unbinds the address in a DMA handle
.SH SYNOPSIS
.nf
#include <sys/ddi.h>
#include <sys/sunddi.h>



\fBint\fR \fBddi_dma_unbind_handle\fR(\fBddi_dma_handle_t\fR \fIhandle\fR);
.fi

.SH PARAMETERS
.ne 2
.na
\fB\fIhandle\fR \fR
.ad
.RS 11n
The  \fBDMA\fR handle previously allocated by a call to
\fBddi_dma_alloc_handle\fR(9F).
.RE

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH DESCRIPTION
\fBddi_dma_unbind_handle()\fR frees all  \fBDMA\fR resources associated with an
existing  \fBDMA\fR handle.  When a  \fBDMA\fR transfer completes, the driver
should call \fBddi_dma_unbind_handle()\fR to free system  \fBDMA\fR resources
established by a call to \fBddi_dma_buf_bind_handle\fR(9F) or
\fBddi_dma_addr_bind_handle\fR(9F). \fBddi_dma_unbind_handle()\fR does an
implicit \fBddi_dma_sync\fR(9F) making further synchronization steps
unnecessary.
.SH RETURN VALUES
.ne 2
.na
\fB\fBDDI_SUCCESS\fR \fR
.ad
.RS 16n
on success
.RE

.sp
.ne 2
.na
\fB\fBDDI_FAILURE\fR \fR
.ad
.RS 16n
on failure
.RE

.SH CONTEXT
\fBddi_dma_unbind_handle()\fR can be called from user, kernel, or interrupt
context.
.SH SEE ALSO
.BR ddi_dma_addr_bind_handle (9F),
.BR ddi_dma_alloc_handle (9F),
.BR ddi_dma_buf_bind_handle (9F),
.BR ddi_dma_free_handle (9F),
.BR ddi_dma_sync (9F)
.sp
.LP
\fIWriting Device Drivers\fR