Link role determination in a dual-mode Peripheral Component Interconnect express (PCIe) device
US10482050B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2017 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | Jan 13, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/0026
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Link role determination in a dual-mode Peripheral Component Interconnect express (PCIe) device is disclosed. In this regard, determining a link role for a dual-mode PCIe device involves configuring the dual-mode PCIe device to operate in a root complex (RC) mode or an endpoint mode. The dual-mode PCIe device first performs a configuration and initiation sequence on a wire-based PCIe link in the RC mode. If the configuration and initiation sequence on the wire-based PCIe link is unsuccessful, then the dual-mode PCIe device invokes a random delay and switches to the endpoint mode at expiration of the random delay. By determining a link role of the dual-mode PCIe device based on the configuration and initiation sequence, it is possible to configure dynamically the dual-mode PCIe device to operate in the RC mode or the endpoint mode, thus allowing flexible configuration of the dual-mode PCIe device based on various application scenarios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.