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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 addition 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

Index

NAME

SYNOPSIS

INTERFACE LEVEL

PARAMETERS

DESCRIPTION

RETURN VALUES

CONTEXT

SEE ALSO

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