RIO_DMA_PREP_XFER(9) | RapidIO driver interface | RIO_DMA_PREP_XFER(9) |
NAME¶
rio_dma_prep_xfer - RapidIO specific wrapper for device_prep_slave_sg callback defined by DMAENGINE.
SYNOPSIS¶
struct dma_async_tx_descriptor * rio_dma_prep_xfer(struct dma_chan * dchan, u16 destid, struct rio_dma_data * data, enum dma_transfer_direction direction, unsigned long flags);
ARGUMENTS¶
struct dma_chan * dchan
u16 destid
struct rio_dma_data * data
enum dma_transfer_direction direction
unsigned long flags
DESCRIPTION¶
Initializes RapidIO capable DMA channel for the specified data transfer. Uses DMA channel private extension to pass information related to remote target RIO device.
RETURN¶
pointer to DMA transaction descriptor if successful, error-valued pointer or NULL if failed.
AUTHOR¶
Matt Porter <mporter@kernel.crashing.org>, <mporter@mvista.com>
COPYRIGHT¶
June 2017 | Kernel Hackers Manual 4.11 |