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

On Tue, 10 Jul 2007 17:45:11 +0800 Zhang Wei 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.

Signed-off-by: Zhang Wei <redacted>
---
 include/linux/dmaengine.h |   35 +++++++++++++++++++++++++++++++++++
 1 files changed, 35 insertions(+), 0 deletions(-)

 /**
+ * dma_async_raw_xfer - transfor data between physical addresses with callback

                           transfer

+ * @chan: DMA channel to be used
+ * @dest: destination address (physical)
+ * @src: source address (physical)
+ * @len: length
+ */
+static inline dma_cookie_t dma_async_raw_xfer(struct dma_chan *chan,
+				dma_addr_t dest, dma_addr_t src, size_t len,
+				dma_xfer_callback cb, void *data)
+{

---
~Randy
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