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Name

Synopsis

#include <sys/conf.h>

#include <sys/ddi.h>

#include <sys/sunddi.h>

int ddi_dma_curwin(ddi_dma_handle_t handle, off_t *offp,u_int *lenp);

Interface Level

Solaris SPARC DDI specific (Solaris SPARC DDI).

Arguments

handle

The DMA handle filled in by a call to ddi_dma_setup(9F) .

offp

A pointer to a value which will be filled in with the current offset from the beginning of the object that is mapped for DMA.

lenp

A pointer to a value which will be filled in with the size, in bytes, of the current window onto the object that is mapped for DMA.

Description

ddi_dma_curwin() reports the current DMA window offset and size. If a DMA mapping allows partial mapping, that is if the DDI_DMA_PARTIAL flag in the ddi_dma_req(9S) structure is set, its current (effective) DMA window offset and size can be obtained by a call to ddi_dma_curwin().

Return Values

ddi_dma_curwin() returns:

DDI_SUCCESS

The current length and offset can be established.

DDI_FAILURE

Otherwise.

Context

ddi_dma_curwin() can be called from user or interrupt context.

See Also

Table of Contents

• Name
• Synopsis
• Interface Level
• Arguments
• Description
• Return Values
• Context
• See Also