NAME

ddi_dma_htoc - convert a DMA handle to a DMA address cookie

SYNOPSIS

#include <sys/conf.h>

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

int ddi_dma_htoc(ddi_dma_handle_t handle, off_t off, ddi_dma_cookie_t * cookiep);

ARGUMENTS

handle

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

off

An offset into the object that handle maps.

cookiep

A pointer to a ddi_dma_cookie(9S) structure.

INTERFACE LEVEL

Solaris SPARC DDI specific (Solaris SPARC DDI).

DESCRIPTION

ddi_dma_htoc( ) takes a DMA handle (established by ddi_dma_setup(9F)), and fills in the cookie pointed to by cookiep with the appropriate address, length, and bus type to be used to program the DMA engine.

RETURN VALUES

ddi_dma_htoc( ) returns:

DDI_SUCCESS

Successfully filled in the cookie pointed to by cookiep.

DDI_FAILURE

Failed to successfully fill in the cookie.

CONTEXT

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

SEE ALSO

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

Writing Device Drivers