| 摘要 |
A frame based data transfer device includes a receive frame parser, a receive frame processor, and a DMA engine. The receive frame parser receives a frame, stores framing information from the frame in a receive header queue, and stores an information unit from the frame in an information unit buffer. The receive frame processor is coupled to the receive header queue. The receive frame processor reads a transport layer task context as determined by a tag field in the framing information, determines how to handle the frame from the transport layer task context and framing information, generates a DMA descriptor, and stores an updated transport layer task context. The DMA engine is coupled to the information unit buffer and receive frame processor. The DMA engine reads a DMA task context, transfers the information unit to a destination memory by processing the DMA descriptor, and stores an updated DMA task context.
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