| 摘要 |
A system with a host bus adapter (“HBA”) having a TCP/IP offload engine is provided. The HBA includes logic for concurrently processing markers, data integrity fields (“DIFs”) and digests by using plural counters that count words in a data stream and individual routing bits are set for markers, DIFs and digests based on the plural counter values. When a counter reaches a certain threshold value, then locator bits are set for a field and the locator bits are forwarded with the data stream. A marker counter is incremented when each word in a data stream passes by the marker counter and markers can be inserted at a programmed interval. For DIF calculation an offset of a first byte in a DMA transfer and partial cyclic redundancy code value is seeded into a DIF location counter, which is incremented for each byte of data that passes by the DIF location counter.
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