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LEARN ABOUT XFREE86

ddi_dma_numwin

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

NAME

       ddi_dma_numwin - retrieve number of DMA windows

SYNOPSIS

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

       int ddi_dma_numwin(ddi_dma_handle_t handle, uint_t *nwinp);

PARAMETERS

       handle	       The  DMA handle previously allocated by a call to  ddi_dma_alloc_handle(9F).

       nwinp	       Upon a successful return,  nwinp will contain the number of  DMA windows for this object.

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

DESCRIPTION

       ddi_dma_numwin() returns the number of  DMA windows for a  DMA object if partial resource allocation was permitted.

RETURN VALUES

       ddi_dma_numwin() returns:

       DDI_SUCCESS	       Successfully filled in the number of  DMA windows.

       DDI_FAILURE	       DMA windows are not activated.

CONTEXT

       ddi_dma_numwin() can be called from user, kernel, or interrupt context.

SEE ALSO

       ddi_dma_addr_bind_handle(9F), ddi_dma_alloc_handle(9F), ddi_dma_buf_bind_handle(9F), ddi_dma_unbind_handle(9F)

       Writing Device Drivers

SunOS 5.10							    29 Sep 1994 						ddi_dma_numwin(9F)