Affiliated Asynchronous Errors

The term “affiliated” is used because the event is associated (or affiliated) with a specific SQ, RQ, CQ, or EEC. The term “error” is used because it is an error, but the HCA is unable to report the error in a CQE. The affected QP or EEC is transitioned to the Error state. The currently defined error types are:

• CQ Error. An error occurred when the HCA was attempting to write a CQE to a CQ. If any SQ or RQ associated with the CQ should subsequently attempt to post a CQE to that CQ, it results in the reporting of this error. CQEs can no longer be posted to the CQ, and it is not guaranteed that CQEs already present in the CQ at the time that the error occurred can be retrieved successfully. Possible causes include a CQ overrun or a CQ protection error.

• Local Work Queue Catastrophic Error. An error while accessing or processing WQEs on a SQ or RQ prevents the reporting of completions. This error is generated when a SQ or RQ associated with the CQ that caused the CQ Error (see the previous bullet item) attempts to use that CQ.

• Local EEC Catastrophic Error. An error while accessing or processing an EEC prevents the successful posting of CQEs to RD QP CQs.

• Path Migration Request Error. An incoming path migration request to this QP or EEC was not accepted. Refer to “Automatic Path Migration” on page 575 for a detailed description of Automatic Path Migration.