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RIO_DMA_PREP_SLAVE_S(9) RapidIO driver interface RIO_DMA_PREP_SLAVE_S(9)

NAME

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

SYNOPSIS

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);

ARGUMENTS

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

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. Returns pointer to DMA transaction descriptor or NULL if failed.

AUTHOR

Matt Porter <mporter@kernel.crashing.org>, <mporter@mvista.com>
Author.

COPYRIGHT

February 2017 Kernel Hackers Manual 3.16