#include <sys/conf.h> #include <sys/ddi.h> #include <sys/sunddi.h>int ddi_dma_curwin(ddi_dma_handle_t handle, off_t *offp, uint_t *lenp);
Solaris SPARC DDI specific (Solaris SPARC DDI).
The DMA handle filled in by a call to ddi_dma_setup(9F).
A pointer to a value which will be filled in with the current offset from the beginning of the object that is mapped for DMA.
A pointer to a value which will be filled in with the size, in bytes, of the current window onto the object that is mapped for DMA.
ddi_dma_curwin() reports the current DMA window offset and size. If a DMA mapping allows partial mapping, that is if the DDI_DMA_PARTIAL flag in the ddi_dma_req(9S) structure is set, its current (effective) DMA window offset and size can be obtained by a call to ddi_dma_curwin().
The current length and offset can be established.
ddi_dma_curwin() can be called from user or interrupt context.