Methods, systems, and computer program product for a PCI implementation handling multiple packets

摘要

Disclosed are peripheral component interconnect (PCI) implementations and methods for implementing PCI implementations handling posted transaction layer packets (TLPs) and completion TLPs. PCI implementations include one or more receive buffers storing completion TLPs and posted TLPs, a set of write and read pointers for the receive buffers, a token manager to associate ordering tokens with posted TLPs, and a pointer-based ordering mechanism to determine an order for handling posted and completion TLPs. PCI implementations may further include an identification-based ordering mechanism to revise the order. The methods identify a completion TLP and multiple posted TLPs, associate a posted TLP with an ordering token, and determine the order for handling the completion and posted TLPs with at least the pointer-based ordering mechanism. The methods may further optionally revise the order with at least the identification-based ordering mechanism.