Kernel Functions for Drivers                     ddidmafree(9F)



NAME
     ddidmafree - release system DMA resources

SYNOPSIS
     #include 
     #include 



     int ddidmafree(ddidmahandlet handle);


INTERFACE LEVEL
     This interface is obsolete.  ddidmafreehandle(9F)  should
     be used instead.

PARAMETERS
     handle    The   handle   filled   in   by    a    call    to
               ddidmasetup(9F).


DESCRIPTION
     The ddidmafree() function releases  system  DMA  resources
     set  up by ddidmasetup(9F). When a DMA transfer completes,
     the driver should free up system DMA  resources  established
     by  a  call  to ddidmasetup(9F). This is done by a call to
     ddidmafree().    ddidmafree()    does    an     implicit
     ddidmasync(9F)  for  you  so  any  further synchronization
     steps are not necessary.

RETURN VALUES
     The ddidmafree() function returns:

     DISUCES    Successfully released resources


     DIFAILURE    Failed to free resources


CONTEXT
     The ddidmafree() function can be called from user,  inter-
     rupt, or kernel context.

ATRIBUTES
     See attributes(5) for a description of the following  attri-
     butes:









SunOS 5.11          Last change: 16 Jan 2006                    1






Kernel Functions for Drivers                     ddidmafree(9F)



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Stability Level              Obsolete                    
    


SEE ALSO
     attributes(5),                       ddidmaaddrsetup(9F),
     ddidmabufsetup(9F),              ddidmafreehandle(9F),
     ddidmahtoc(9F), ddidmasync(9F), ddidmareq(9S)


     Writing Device Drivers









































SunOS 5.11          Last change: 16 Jan 2006                    2