Name | Synopsis | Interface Level | Parameters | Description | Return Values | Context | Attributes | See Also
#include <sys/ddi.h> #include <sys/sunddi.h> int ddi_dma_free(ddi_dma_handle_t handle);
This interface is obsolete. ddi_dma_free_handle(9F) should be used instead.
The handle filled in by a call to ddi_dma_setup(9F).
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_setup(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.
The ddi_dma_free() function returns:
Successfully released resources
Failed to free resources
The ddi_dma_free() function can be called from user, interrupt, or kernel context.
See attributes(5) for a description of the following attributes:
ATTRIBUTE TYPE |
ATTRIBUTE VALUE |
---|---|
Stability Level |
Obsolete |
attributes(5), ddi_dma_addr_setup(9F), ddi_dma_buf_setup(9F), ddi_dma_free_handle(9F), ddi_dma_htoc(9F), ddi_dma_sync(9F), ddi_dma_req(9S)
Name | Synopsis | Interface Level | Parameters | Description | Return Values | Context | Attributes | See Also