ddi_dma_free(9F) Kernel Functions for Drivers 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This interface is obsolete.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
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.
RETURN VALUES
ddi_dma_free() returns:
DDI_SUCCESS Successfully released resources
DDI_FAILURE Failed to free resources
CONTEXT
ddi_dma_free() can be called from user or interrupt context.
ATTRIBUTES
See attributes(5) for a description of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Stability Level |Obsolete |
+-----------------------------+-----------------------------+
SEE ALSO
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)
Writing Device Drivers
SunOS 5.10 27 Sep 2002 ddi_dma_free(9F)
