ddi_dma_free(9F)					   Kernel Functions for Drivers 					  ddi_dma_free(9F)

NAME

       ddi_dma_free - release system DMA resources

SYNOPSIS

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

       int ddi_dma_free(ddi_dma_handle_t handle);

INTERFACE LEVEL

       This interface is obsolete. ddi_dma_free_handle(9F) should be used instead.

PARAMETERS

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

DESCRIPTION

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

RETURN VALUES

       ddi_dma_free() returns:

       DDI_SUCCESS     Successfully released resources

       DDI_FAILURE     Failed to free resources

CONTEXT

       ddi_dma_free() can be called from user or interrupt context.

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Stability Level 	     |Obsolete			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5), ddi_dma_addr_setup(9F), ddi_dma_buf_setup(9F), ddi_dma_free_handle(9F), ddi_dma_htoc(9F), ddi_dma_sync(9F), ddi_dma_req(9S)

       Writing Device Drivers

SunOS 5.10							    27 Sep 2002 						  ddi_dma_free(9F)