General input/output architecture, protocol and related methods to implement flow control

摘要

An enhanced general input/output communication architecture, protocol and related methods are presented.

主权项

1. An apparatus, comprising:
a protocol stack including layers to communicate data over an interconnect, wherein the protocol stack is implemented at least in part in hardware circuitry and the layers comprise a physical layer, a data link layer, and a transaction layer; a transmitter to transmit data on a point to point interconnect; and wherein the protocol stack is to assemble a plurality of messages, and at least one of the messages comprises a data link layer message to include a plurality of credits fields, each of the plurality of credits fields corresponds to a respective one of a plurality of credit counters and is to indicate a respective number of credits to be returned for the corresponding credit counter, and the data link layer message does not encapsulate a transaction layer packet.