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ddi_dma_free(9f)

ddi_dma_free(9F)               Kernel Functions               ddi_dma_free(9F)



NAME
       ddi_dma_free - release system DMA resources

SYNOPSIS
       #include <sys/ddi.h>
       #include <sys/sunddi.h>

       int ddi_dma_free(ddi_dma_handle_t handle);

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       This  interface  is  obsolete.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

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


DESCRIPTION
       The ddi_dma_free() function releases system DMA  resources  set  up  by
       ddi_dma_setup(9F).  When  a  DMA  transfer completes, the driver should
       free up system DMA resources established  by  a  call  to  ddi_dma_set‐
       up(9F).  This  is done by a call to ddi_dma_free(). ddi_dma_free() does
       an implicit ddi_dma_sync(9F) for you  so  any  further  synchronization
       steps are not necessary.

RETURN VALUES
       The ddi_dma_free() function returns:

       DDI_SUCCESS    Successfully released resources


       DDI_FAILURE    Failed to free resources


CONTEXT
       The ddi_dma_free() function can be called from user, interrupt, or ker‐
       nel context.

ATTRIBUTES
       See attributes(7) for a description of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE VALUE _ Stability LevelObsolete


SEE ALSO
       attributes(7),         ddi_dma_htoc(9F),        ddi_dma_addr_setup(9F),
       ddi_dma_buf_setup(9F),    ddi_dma_free_handle(9F),    ddi_dma_sync(9F),
       ddi_dma_req(9S)


       Writing Device Drivers in Oracle Solaris 11.4



Oracle Solaris 11.4               16 Jan 2006                 ddi_dma_free(9F)
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