ddi_dma_numwin(9F) manual page
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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);
- 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.
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:
- DDI_SUCCESS
- Successfully
filled in the number of DMA
windows.
- DDI_FAILURE
- 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)
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