DDI_DMA_UNBIND_HANDLE(9F) Kernel Functions for Drivers DDI_DMA_UNBIND_HANDLE(9F)

ddi_dma_unbind_handle - unbinds the address in a DMA handle

#include <sys/ddi.h>
#include <sys/sunddi.h>
int ddi_dma_unbind_handle(ddi_dma_handle_t handle);

handle
The DMA handle previously allocated by a call to ddi_dma_alloc_handle(9F).

illumos DDI specific (illumos DDI).

ddi_dma_unbind_handle() frees all DMA resources associated with an existing DMA handle. When a DMA transfer completes, the driver should call ddi_dma_unbind_handle() to free system DMA resources established by a call to ddi_dma_buf_bind_handle(9F) or ddi_dma_addr_bind_handle(9F). ddi_dma_unbind_handle() does an implicit ddi_dma_sync(9F) making further synchronization steps unnecessary.

DDI_SUCCESS
on success

DDI_FAILURE

on failure

ddi_dma_unbind_handle() can be called from user, kernel, or interrupt context.

ddi_dma_addr_bind_handle(9F), ddi_dma_alloc_handle(9F), ddi_dma_buf_bind_handle(9F), ddi_dma_free_handle(9F), ddi_dma_sync(9F)

Writing Device Drivers

September 26, 1994 OmniOS