ddi_dma_numwin - retrieve number of DMA windows
#include <sys/ddi.h> #include <sys/sunddi.h> int ddi_dma_numwin(ddi_dma_handle_t handle, uint_t *nwinp);
The DMA handle previously allocated by a call to ddi_dma_alloc_handle(9F).
Upon a successful return, nwinp will contain the number of DMA windows for this object.
Solaris DDI specific (Solaris DDI).
ddi_dma_numwin() returns the number of DMA windows for a DMA object if partial resource allocation was permitted.
ddi_dma_numwin() returns:
Successfully filled in the number of DMA windows.
DMA windows are not activated.
ddi_dma_numwin() can be called from user, kernel, or interrupt context.
ddi_dma_addr_bind_handle(9F), ddi_dma_alloc_handle(9F), ddi_dma_buf_bind_handle(9F), ddi_dma_unbind_handle(9F)