[Go to CFHT Home Page] Man Pages
Back to Software Index  BORDER=0Manpage Top Level
    ddi_dma_numwin(9F) manual page Table of Contents

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);

Arguments

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)


Table of Contents