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
       dchan
           DMA channel to configure

       destid
           target RapidIO device destination ID

       data
           RIO specific data descriptor

       direction
           DMA data transfer direction (TO or FROM the device)

       flags
           dmaengine defined 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 AT kernel.org>, <mporter AT mvista.com>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                      RIO_DMA_PREP_XFER(9)