Virtualization bridge device

US7979592B1 · kind B1 · utility

Assignee

• Emulex Design and Manufacturing Corporation · US

Inventors

• Christopher J. Pettey · Cedar Park, US
• Stephen D. Glaser · San Francisco, US
• Asif Khan · Cedar Park, US
• Jon Nalley · Leander, US
• Stephen P. Rousset · Round Rock, US
• Tom Saeger · Leander, US
• Robert Haskell Utley · Round Rock, US

Key dates

• Filing date: Feb 9, 2008
• Grant date: Jul 12, 2011
• Expiry date: Mar 27, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F13/404
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A computer system includes a shared I/O device including functions providing access to device local memory space, and a plurality of roots coupled to the shared I/O device via a switch fabric. A first root assigns a first address in a first root memory space to a first function. A second root assigns a second address in a second root memory space to a second function. The switch fabric maps the first root memory space to a first portion of device local memory space and the second root memory space to a second portion of device local memory space. Subsequently, the switch receives a data transaction request from the first root targeted to the first address, translates the first address to a corresponding location in the first portion of the device local memory space based on the mapping, and routes the data transaction request to the I/O device.