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 5.11 29 Sep 1994 ddi_dma_numwin(9F)