ddi_dma_burstsizes(9F) Kernel Functions for Drivers ddi_dma_burstsizes(9F)
NAME
ddi_dma_burstsizes - find out the allowed burst sizes for a DMA mapping
SYNOPSIS
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
int ddi_dma_burstsizes(ddi_dma_handle_t handle);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
handle A DMA handle that was filled in by a successful call to ddi_dma_setup(9F).
DESCRIPTION
ddi_dma_burstsizes() returns the allowed burst sizes for a DMA mapping. This value is derived from the dlim_burstsizes member of the
ddi_dma_lim_sparc(9S) structure, but it shows the allowable burstsizes after imposing on it the limitations of other device layers in addi-
tion to device's own limitations.
RETURN VALUES
ddi_dma_burstsizes() returns a binary encoded value of the allowable DMA burst sizes. See ddi_dma_lim_sparc(9S) for a discussion of DMA
burst sizes.
CONTEXT
This function can be called from user or interrupt context.
SEE ALSO
ddi_dma_devalign(9F), ddi_dma_setup(9F), ddi_dma_lim_sparc(9S), ddi_dma_req(9S)
Writing Device Drivers
SunOS 5.10 1 Feb 1994 ddi_dma_burstsizes(9F)
