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This interface is obsolete.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).
ddi_dma_free() 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.
ddi_dma_free() returns:
Successfully released resources
Failed to free resources
ddi_dma_free() can be called from user or interrupt 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