Lane error detection and lane removal mechanism to reduce the probability of data corruption

摘要

Method, apparatus, and systems for detecting lane errors and removing errant lanes in multi-lane links. Data comprising link packets is split into a plurality of bitstreams and transmitted over respective lanes of a multi-lane link in parallel. The bitstream data is received at multiple receive lanes of a receiver port and processed to reassemble link packets and to calculate a CRC over the data received on each lane. The link packets include a transmitted CRC that is compared to a received CRC to detect link packet errors. Upon detection of a link packet error, per-lane or per transfer group CRC values are stored, and a retry request is issued to retransmit the bad packet. In conjunction with receipt of the retransmitted packet, per-lane or per transfer group CRC values are recalculated over the received data and compared with the stored per-lane or per transfer group CRC values to detect the lane causing the link packet error.

主权项

1. An apparatus, comprising:
a link interface including, a receive port comprising a plurality of receive lanes, each configured to receive a respective bitstream of a plurality of bitstreams transmitted in parallel from a transmit port of a link interface peer; and circuitry and logic to,
process the plurality of bitstreams as they are received and extract data comprising link packets transmitted from the link interface peer;detect a bad received link packet; anddetect an errant receive lane that caused the bad received link packet.