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ddi_dma_coff - convert a DMA cookie to an offset within a DMA handle.

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



int ddi_dma_coff(ddi_dma_handle_t handle, ddi_dma_cookie_t *cookiep,
 off_t *offp);

Solaris SPARC DDI (Solaris SPARC DDI). This interface is obsolete.

handle

cookiep

offp

The ddi_dma_coff() function converts the values in DMA cookie pointed to by cookiep to an offset (in bytes) from the beginning of the object that the DMAhandle has mapped.

The ddi_dma_coff() function allows a driver to update a DMA cookie with values it reads from its device's DMA engine after a transfer completes and convert that value into an offset into the object that is mapped for DMA.

The ddi_dma_coff() function returns:

DDI_SUCCESS

DDI_FAILURE

The ddi_dma_coff() function can be called from user, interrupt, or kernel context.

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Obsolete

ddi_dma_setup(9F), ddi_dma_sync(9F), ddi_dma_cookie(9S)

Writing Device Drivers