1ddi_dma_numwin(9F)       Kernel Functions for Drivers       ddi_dma_numwin(9F)
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NAME

6       ddi_dma_numwin - retrieve number of DMA windows
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SYNOPSIS

9       #include <sys/ddi.h>
10       #include <sys/sunddi.h>
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14       int ddi_dma_numwin(ddi_dma_handle_t handle, uint_t *nwinp);
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PARAMETERS

18       handle     The    DMA   handle   previously  allocated  by  a  call  to
19                  ddi_dma_alloc_handle(9F).
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22       nwinp      Upon a successful return,  nwinp will contain the number  of
23                  DMA windows for this object.
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INTERFACE LEVEL

27       Solaris DDI specific (Solaris DDI).
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DESCRIPTION

30       ddi_dma_numwin()  returns  the number of  DMA windows for a  DMA object
31       if partial resource allocation was permitted.
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RETURN VALUES

34       ddi_dma_numwin() returns:
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36       DDI_SUCCESS     Successfully filled in the number of  DMA windows.
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39       DDI_FAILURE     DMA windows are not activated.
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CONTEXT

43       ddi_dma_numwin() can be called from user, kernel, or interrupt context.
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SEE ALSO

46       ddi_dma_addr_bind_handle(9F),                 ddi_dma_alloc_handle(9F),
47       ddi_dma_buf_bind_handle(9F), ddi_dma_unbind_handle(9F)
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50       Writing Device Drivers
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54SunOS 5.11                        29 Sep 1994               ddi_dma_numwin(9F)