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ddi_dma_curwin (9)
  • >> ddi_dma_curwin (9) ( Solaris man: Ядро )
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    NAME

    ddi_dma_curwin - report current DMA
    window offset and size
     
    

    SYNOPSIS

    #include <sys/conf.h>
    #include <sys/ddi.h>
    #include <sys/sunddi.h>
    
    
    
    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    This interface is obsolete.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 established.

    DDI_FAILURE

    Otherwise.

     

    CONTEXT

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

    ATTRIBUTES

    See attributes(5) for a description of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Stability LevelObsolete

     

    SEE ALSO

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

    Writing Device Drivers


     

    Index

    NAME
    SYNOPSIS
    INTERFACE LEVEL
    PARAMETERS
    DESCRIPTION
    RETURN VALUES
    CONTEXT
    ATTRIBUTES
    SEE ALSO


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