[PATCH 3/4] Extend the DMA-engine API.

[Dan Williams]

On 7/10/07, Zhang Wei <wei.zhang at freescale.com> wrote:
> Add channel wait queue and transfer callback dma_xfer_callback().
> If the DMA controller and driver support interrupt, when the
> transfer is finished, it will wakeup the wait queue
> and call the callback function of the channel.
>
> Add dma_async_raw_xfer() to API and device_raw_xfer() to struct dma_device
> for RAW physical address DMA transfer, which will be used at transfer
> between I/O address and memory address.
>

Please review the async_tx API patch series[1], it should meet your
needs.  What you call "raw" mode support is now default for the
dmaengine driver interface.  I plan to request that this series be
merged for 2.6.23.

Regards,
Dan

[1]http://marc.info/?l=linux-raid&w=2&r=1&s=md-accel&q=b