Manual Pages for UNIX Operating System command usage for man ddi_dma_numwin

Kernel Functions for Drivers                   ddi_dma_numwin(9F)



NAME
     ddi_dma_numwin - retrieve number of DMA windows

SYNOPSIS
     #include 
     #include 



     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).

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  inter-
     rupt 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)


     Writing Device Drivers







SunOS 5.11          Last change: 29 Sep 1994                    1