Man page 9 : rio_dma_prep_slave_sg

rio_dma_prep_slave_sg - RapidIO specific wrapper for device_prep_slave_sg callback defined by DMAENGINE.

struct dma_async_tx_descriptor * rio_dma_prep_slave_sg(struct rio_dev *  rdev , struct dma_chan *  dchan , struct rio_dma_data *  data , enum dma_transfer_direction  direction , unsigned long  flags );

rdev
    RIO device control structure

dchan
    DMA channel to configure

data
    RIO specific data descriptor

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

flags
    dmaengine defined flags

Initializes RapidIO capable DMA channel for the specified data transfer. Uses DMA channel private extension to pass information related to remote target RIO device. Returns pointer to DMA transaction descriptor or NULL if failed.

Matt Porter <>, <>
    Author.