Timer control for peripheral component interconnect express components implemented with thunderbolt controllers

US11132319B2 · kind B2 · utility

Assignee

• Intel Corporation · US

Inventors

• Christopher Wing Hong Ngau · Bukit Mertajam, MY
• Hooi Kar Loo · Bayan Lepas, MY
• Poh Thiam Teoh · Bandar Baru Sungai Buloh, MY
• Shashitheren Kerisnan · Bukit Mertajam, MY
• Maxim Dan · Haifa, IL
• Chee Siang Chow · Merang, MY

Key dates

• Filing date: Jan 12, 2018
• Grant date: Sep 28, 2021
• Expiry date: Jan 29, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B10/27
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Aspects of the embodiments are directed to systems, methods, and devices for controlling power management entry. A PCIe root port controller can be configured to receive, at a downstream port of the root port controller, from an upstream switch port, a first power management entry request; reject the first power management entry request; transmit a negative acknowledgement message to the upstream switch port; initiate a timer for at least 20 microseconds; during the 20 microseconds, ignore any power management entry requests received from the upstream switch port; receive, after the expiration of the 20 microseconds, a subsequent power management entry request; accept the subsequent power management entry request; and transmit an acknowledgement of the acceptance of the subsequent power management entry request to the upstream switch port.