Fibre channel interface controller that performs non-blocking output and input of fibre channel data frames and acknowledgement frames to and from a fibre channel
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United States of America Patent
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Sep 14, 2004
Issued Date -
N/A
app pub date -
Dec 30, 1999
filing date -
Dec 30, 1999
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Expired
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Abstract
A method and system for non-blocking processing of data frames and link-control frames within an interface controller component of a fiber channel node. Separate FIFO queues are provided for queuing incoming FC data frames and ACK frames and a separate FIFO queue and list are provided for queuing outgoing FC data frames and buffering outgoing ACK frames. An outbound sequence manager component of the interface controller directly processes incoming ACK frames, transforming them into end-to-end credits that allow the outbound sequence manager to transmit additional FC data frames to the remote node that sent the processed ACK frame. Thus, processing of ACK frames, unlike in prior art interface controller implementations, is neither delayed nor blocked by previously received, but as yet unprocessed, FC data frames.
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