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solaris:ddi_dma_free.9f

ddi_dma_free


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This interface is obsolete.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(7) for a description of the following attributes:

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


solaris/ddi_dma_free.9f.txt · Last modified: 2023/07/19 08:57 by A User Not Logged in