Apparatus and method for point-to-point interconnect testing

A system comprises:

• a processor;
• a chipset coupled to the processor, the chipset comprising:
• an input/output (I/O) hub, including a link controller to couple an end-point device to the chipset via an interconnect;
• a test plug in card coupled between the end-point and the chipset, the card including a controller to drive a selected test value on at least one lane of the interconnect during retraining of the interconnect in response to a reset and to detect a lane break condition if at least one initial link training value does not match a corresponding link training value following retraining of the interconnect in response to the reset;
• and
• a wireless transmitter and receiver circuitry coupled to the chipset.

A method comprising:

• driving a selected test value on at least one lane of a point-to-point link;
• causing the point-to-point to reset;
• and
• detecting a lane break condition if at least one initial link training value does not match a corresponding link training value following retraining of the link in response to the reset.

An article of manufacture having a machine accessible medium including associated data, wherein the data, when executed, results in the machine performing:

• determining an initial link width value of a point-to-point link following link training of the point-to-point link;
• selecting a respective test value for one or more lanes of the point-to-point link according to a link width value;
• driving at least one respective test value on at least one lane of the link during retraining of the point-to-point link in response to a reset;
• and
• comparing at least one initial link training value to a corresponding link training value following the retraining of the link in response to the reset.