Query: ddi_dma_free
OS: xfree86
Section: 9f
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
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This interface is obsolete.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)
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