Manual Pages for UNIX Operating System command usage for man ddi_dma_curwin

Kernel Functions for Drivers                   ddi_dma_curwin(9F)



NAME
     ddi_dma_curwin - report current DMA window offset and size

SYNOPSIS
     #include 
     #include 
     #include 



     int ddi_dma_curwin(ddi_dma_handle_t handle, off_t *offp, uint_t *lenp);


INTERFACE LEVEL
     This interface is  obsolete.  ddi_dma_getwin(9F)  should  be
     used instead.

PARAMETERS
     handle    The  DMA  handle  filled   in   by   a   call   to
               ddi_dma_setup(9F).


     offp      A pointer to a value which will be filled in  with
               the  current  offset  from  the  beginning  of the
               object that is mapped for DMA.


     lenp      A pointer to a value which will be filled in  with
               the size, in bytes, of the current window onto the
               object that is mapped for DMA.


DESCRIPTION
     The ddi_dma_curwin() function reports the current DMA window
     offset  and  size.  If a DMA mapping allows partial mapping,
     that is if the DDI_DMA_PARTIAL flag in  the  ddi_dma_req(9S)
     structure  is set, its current (effective) DMA window offset
     and size can be obtained by a call to ddi_dma_curwin().

RETURN VALUES
     The ddi_dma_curwin() function returns:

     DDI_SUCCESS    The current length and offset  can  be  esta-
                    blished.


     DDI_FAILURE    Otherwise.


CONTEXT
     The ddi_dma_curwin()  function  can  be  called  from  user,
     interrupt, or kernel context.



SunOS 5.11          Last change: 16 Jan 2006                    1






Kernel Functions for Drivers                   ddi_dma_curwin(9F)



ATTRIBUTES
     See attributes(5) for a description of the following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Stability Level             | Obsolete                    |
    |_____________________________|_____________________________|


SEE ALSO
     attributes(5),    ddi_dma_getwin(9F),    ddi_dma_movwin(9F),
     ddi_dma_setup(9F), ddi_dma_req(9S)


     Writing Device Drivers




































SunOS 5.11          Last change: 16 Jan 2006                    2