DDI_DMA_NUMWIN(9F)DDI_DMA_NUMWIN(9F)NAMEddi_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).
DESCRIPTIONddi_dma_numwin() returns the number of DMA windows for a DMA object if
partial resource allocation was permitted.
RETURN VALUESddi_dma_numwin() returns:
DDI_SUCCESS
Successfully filled in the number of DMA windows.
DDI_FAILURE
DMA windows are not activated.
CONTEXTddi_dma_numwin() can be called from user, kernel, or interrupt context.
SEE ALSOddi_dma_addr_bind_handle(9F), ddi_dma_alloc_handle(9F),
ddi_dma_buf_bind_handle(9F), ddi_dma_unbind_handle(9F)
Writing Device Drivers
Sep 29, 1994 DDI_DMA_NUMWIN(9F)