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Copyright 2014 Garrett D'Amore <garrett@damore.org>
Copyright (c) 1994, Sun Microsystems, Inc.
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ddi_dma_burstsizes - find out the allowed burst sizes for a DMA mapping

#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>



int ddi_dma_burstsizes(ddi_dma_handle_t handle);

illumos DDI specific (illumos DDI). handle ddi_dma_burstsizes() returns the allowed burst sizes for a DMA mapping. This value is derived from the dma_attr_burstsizes member of the ddi_dma_attr(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. ddi_dma_burstsizes() returns a binary encoded value of the allowable DMA burst sizes. See ddi_dma_attr(9S) for a discussion of DMA burst sizes. This function can be called from user or interrupt context. ddi_dma_alloc_handle(9F), ddi_dma_attr(9S)

Writing Device Drivers