Kernel Functions for Drivers               ddidmaburstsizes(9F)



NAME
     ddidmaburstsizes - find out the allowed burst sizes for  a
     DMA mapping

SYNOPSIS
     #include 
     #include 
     #include 



     int ddidmaburstsizes(ddidmahandlet handle);


INTERFACE LEVEL
     Solaris DI specific (Solaris DI).

PARAMETERS
     handle     A DMA handle that was filled in by  a  successful
                call to ddidmasetup(9F).


DESCRIPTION
     ddidmaburstsizes() returns the allowed burst sizes  for  a
     DMA  mapping. This value is derived from the dlimburstsizes
     member of the ddidmalimsparc(9S) structure, but it  shows
     the  allowable  burstsizes  after imposing on it the limita-
     tions of other device layers in  addition  to  device's  own
     limitations.

RETURN VALUES
     ddidmaburstsizes() returns a binary encoded value  of  the
     allowable  DMA  burst sizes. See ddidmalimsparc(9S) for a
     discussion of DMA burst sizes.

CONTEXT
     This function can be called from user or interrupt context.

SEE ALSO
     ddidmadevalign(9F),                     ddidmasetup(9F),
     ddidmalimsparc(9S), ddidmareq(9S)


     Writing Device Drivers











SunOS 5.11           Last change: 1 Feb 1994                    1