Content-type: text/html Man page of ddi_dma_free

ddi_dma_free

Section: Kernel Functions for Drivers (9F)
Updated: 16 Jan 2006
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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This interface is obsolete.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_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

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 kernel context.  

ATTRIBUTES

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

ATTRIBUTE TYPEATTRIBUTE VALUE
Stability LevelObsolete

 

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


 

Index

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

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Time: 02:39:43 GMT, October 02, 2010