Recently at Imgtec we had to provide GLES API buffers with DMA transfer
capabilities to device memory. We had access to a Xilinx CDMA IP module,
but even though the hardware supports scatter-gather operations,
the driver did not. This patch series' goal is to extend the driver
to support SG transfers on CDMA devices.

It also fixes a couple of issues I found in the driver: lack of support
for HW descriptors allocated in an extended address space (above 32 bits)
and an unusual race condition when closing a DMA channel.

Adrian Larumbe (4):
  dmaengine: xilinx_dma: Add extended address support in CDMA
  dmaengine: xilinx_dma: Add channel configuration setting callback
  dmaengine: xilinx_dma: Add CDMA SG transfer support
  dmaengine: xilinx_dma: Add device synchronisation callback

 drivers/dma/xilinx/xilinx_dma.c | 186 ++++++++++++++++++++++++++++++--
 1 file changed, 177 insertions(+), 9 deletions(-)

-- 
2.17.1


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