1ddi_dma_burstsizes(9F)   Kernel Functions for Drivers   ddi_dma_burstsizes(9F)
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NAME

6       ddi_dma_burstsizes - find out the allowed burst sizes for a DMA mapping
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SYNOPSIS

9       #include <sys/conf.h>
10       #include <sys/ddi.h>
11       #include <sys/sunddi.h>
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15       int ddi_dma_burstsizes(ddi_dma_handle_t handle);
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INTERFACE LEVEL

19       Solaris DDI specific (Solaris DDI).
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PARAMETERS

22       handle     A  DMA  handle  that  was  filled in by a successful call to
23                  ddi_dma_setup(9F).
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DESCRIPTION

27       ddi_dma_burstsizes() returns the allowed burst sizes for a DMA mapping.
28       This   value   is  derived  from  the  dlim_burstsizes  member  of  the
29       ddi_dma_lim_sparc(9S) structure, but it shows the allowable  burstsizes
30       after imposing on it the limitations of other device layers in addition
31       to device's own limitations.
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RETURN VALUES

34       ddi_dma_burstsizes() returns a binary encoded value  of  the  allowable
35       DMA  burst  sizes.  See  ddi_dma_lim_sparc(9S)  for a discussion of DMA
36       burst sizes.
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CONTEXT

39       This function can be called from user or interrupt context.
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SEE ALSO

42       ddi_dma_devalign(9F),     ddi_dma_setup(9F),     ddi_dma_lim_sparc(9S),
43       ddi_dma_req(9S)
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46       Writing Device Drivers
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50SunOS 5.11                        1 Feb 1994            ddi_dma_burstsizes(9F)