Patents by Inventor Jeffrey David Duncan

Jeffrey David Duncan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Direct data transfer for device drivers
    Patent number: 8719466
    Abstract: A method for performing direct memory access includes obtaining, by a application executing on a host, a kernel address space identifier of a first driver kernel memory. The application sends the kernel address space identifier to a second device driver. The second device driver obtains, using the kernel address space identifier, a cookie structure binding the first driver kernel memory to a second device driver address space for the first driver kernel memory. The application sends a request for a direct memory access operation. The request includes a location identifier of a location storing a data object in the first driver kernel memory. Based on the cookie structure, the second device driver performs, using the location identifier, the direct memory access operation to transfer the data object from the first driver kernel memory to a second driver kernel memory.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: May 6, 2014
    Assignee: Oracle International Corporation
    Inventors: Jeffrey David Duncan, Damon Neil Clark
  • DIRECT DATA TRANSFER FOR DEVICE DRIVERS
    Publication number: 20130159564
    Abstract: A method for performing direct memory access includes obtaining, by a application executing on a host, a kernel address space identifier of a first driver kernel memory. The application sends the kernel address space identifier to a second device driver. The second device driver obtains, using the kernel address space identifier, a cookie structure binding the first driver kernel memory to a second device driver address space for the first driver kernel memory. The application sends a request for a direct memory access operation. The request includes a location identifier of a location storing a data object in the first driver kernel memory. Based on the cookie structure, the second device driver performs, using the location identifier, the direct memory access operation to transfer the data object from the first driver kernel memory to a second driver kernel memory.
    Type: Application
    Filed: December 16, 2011
    Publication date: June 20, 2013
    Applicant: ORACLE INTERNATIONAL COOPERATION
    Inventors: Jeffrey David Duncan, Damon Neil Clark