LANE ERROR DETECTION AND LANE REMOVAL MECHANISM TO REDUCE THE PROBABILITY OF DATA CORRUPTION

摘要

A method, apparatus and system for detecting lane errors and eliminating erroneous lanes in a multi-lane link are disclosed. The data including the link packet is divided into a plurality of bit streams and transmitted in parallel through each lane of the multi-lane link. The bitstream data is received at multiple receive lanes of the receive port, processed to reassemble the link packet and calculate the CRC for the data received on each lane. The link packet includes a transmit CRC that is compared to the receive CRC to detect a link packet error. Upon detection of a link packet error, the CRC value for each lane or transport group is stored, and a retry request is issued to retransmit a bad packet. With regard to the receipt of the retransmitted packet, the CRC value for each lane or transmission group is recalculated for the received data and compared with the stored CRC value for each lane or transmission group to detect the lane that caused the link packet error do.