Amazon.com, Inc.
Peer-to-peer PCI topology

Abstract:

Provided are systems and methods for enabling peer-to-peer communications between peripheral devices. In various implementations, a computing system can include a PCI switch device. The first PCI switch device can include a first port and be communicatively coupled to a first root complex port. The first PCI switch device can have access to a first PCI endpoint address range. The computing system can further include a second PCI switch device. The second PCI switch device can include a second port, connected to the first port. The second PCI switch device can be communicatively coupled to a second root complex port that is different from the first root complex port. The second PCI switch device can receive a transaction addressed to the first PCI endpoint address range, and identify the transaction as associated with the second port. The second PCI switch device can subsequently transmit the transaction using the second port.