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)