'\" te
.\" Copyright 2014 Garrett D'Amore <garrett@damore.org>
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.TH DDI_DMA_BURSTSIZES 9F "May 24, 2014"
.SH NAME
ddi_dma_burstsizes \- find out the allowed burst sizes for a DMA mapping
.SH SYNOPSIS
.nf
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>



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

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH PARAMETERS
.ne 2
.na
\fB\fIhandle\fR \fR
.ad
.RS 11n
A \fBDMA\fR handle.
.RE

.SH DESCRIPTION
\fBddi_dma_burstsizes()\fR returns the allowed burst sizes for a \fBDMA\fR
mapping. This value is derived from the \fBdma_attr_burstsizes\fR member of the
\fBddi_dma_attr\fR(9S) structure, but it shows the allowable burstsizes
\fBafter\fR imposing on it the limitations of other device layers in addition
to device's own limitations.
.SH RETURN VALUES
\fBddi_dma_burstsizes()\fR returns a binary encoded value of the allowable
\fBDMA\fR burst sizes. See \fBddi_dma_attr\fR(9S) for a discussion of
\fBDMA\fR burst sizes.
.SH CONTEXT
This function can be called from user or interrupt context.
.SH SEE ALSO
\fBddi_dma_alloc_handle\fR(9F), \fBddi_dma_attr\fR(9S)
.sp
.LP
\fIWriting Device Drivers\fR