Hewlett-packard Development Company, L.P.

David L Matthews

Hubert E Brinkmann

Paul V Brownell

Dwight D Riley

Barry S Basile

James Xuan Dinh

Kenneth T Chin

Hahn Norden

Kevin G Depew

John M Cagle

Hubert E Brinkmann, Jr

Paul V Brownnell

Paul V Brownall

William F Doss

Hubert Brinkmann

Paul Brownell

Embodiments of the present invention are directed to methods for virtualizing interrupt modes on behalf of interrupt-generating devices, including I/O-device controllers, so that newer interrupt-generating devices that lack older interrupt modes can be used in systems that continue to rely on older interrupt modes. In one embodiment of the present invention, a PCIe switch or PCIe-based host bridge is modified, or a new component introduced, to provide an interrupt-mode virtualizing function, or virtual interrupt-mode interface, that provides a virtual interrupt mode on behalf of interrupt-generating devices, such as I/O-device controllers, to operating systems, BIOS layers, and other components that communicate with the I/O-device controllers.

Virtual-interrupt-mode interface and method for virtualizing an interrupt mode

In one embodiment, a computer system, comprises at least one host node, at least one input/output node coupled to the host node, at least one multi-function device coupled to the input/output node via a switch, and a middle manager processor comprising logic to block an enumeration process in a host node for the multi-function devices behind the switch hierarchy, initiate an enumeration process for the multi-function devices in a manager processor separate from the host node, store a routing table for the switch hierarchy in a memory module coupled to the manager processor, and allocate, in the manager processor, endpoint device resources to the host node.

Presenting multi-function devices behind a switch hierarchy as a single function device

A blade server system and method for virtually hot plugging and virtually hot removing functions in a shared I/O environment. A management node physically hot inserts and hot removes an I/O node in the server system without a compute node being aware of the hot insert and hot removal. The management node and the compute node create and remove virtual links between the compute node and the virtual functions.

Virtual hot inserting functions in a shared I/O environment

A method and apparatus for host enumeration process. One embodiment of the method provides a bit to indicate to the host whether enumeration process should start or continue. The bit may be set when the shared resource process has been successfully completed, or the bit may be set if too much time has elapsed since the shared resource process has started, or the bit may be set if too much time has elapsed before the shared resource process is started, or the bit may be set if the shared resource process has not been performed successfully, or the bit may be set if the port is open and it is unnecessary to perform the shared resource process.

Method and apparatus for performing a host enumeration process

A method includes providing a bridge device () connected to a host computing device (--) and a peripheral device (---N,-----), the bridge device () being configured to communicatively couple the host device (--) to the peripheral device (---N,-----); and preventing execution of a hardware enumeration process () in the host device (--) until completion of a resource allocation process () in the bridge device ().

Systems and methods of communicatively coupling a host computing device and a peripheral device

Embodiments include methods, apparatus, and systems for converting resets in a shared I/O system. One embodiment includes a method that propagates a first type of reset from a host computer to a multi-function device that shares I/O operations with other hosts. The first type of reset is converted to a second type of reset to prevent the host from resetting functions bound to the other hosts at the multi-function device.

Conversion of resets sent to a shared device

A system for transforming a single root input/output virtualization (SR-IOV) function to appear as a legacy function, and a corresponding method includes a switch platform coupled between a legacy host and a SR-IOV-enabled device. The switch platform includes a processor programmed to discern configuration cycles by type and to process the configuration cycles, and one or more local registers that store data related to the configuration cycles.

System and method for transforming PCIe SR-IOV functions to appear as legacy functions

A network node within a network includes a first receive buffer, first buffer management, a second receive buffer and second buffer management. The first buffer management performs link level credit based flow control for network packets that the first buffer management places in the first receive buffer. The second buffer management performs end-to-end credit based flow control for network packets that the second buffer management receives from the first receive buffer and processes before placing data in the second receive buffer.

End-to-end flow control in a network

A computer-executed method for controlling transaction flow in a network comprises communicating transaction packets among a plurality of devices in a network fabric and subdividing a memory into a plurality of memory segments for storing received transaction cycles according to transaction packet type comprising posted, non-posted, and completion cycles. A plurality of transaction cycles are received in the memory segment plurality at a target device and transaction cycle priority is allocated according to transaction packet type wherein posted cycles have highest priority. Cycles are retrieved from the memory segment plurality in an order determined by priority.

Transaction flow control in PCI express fabric

A system is provided comprising a fabric coupling together a plurality of computing devices, wherein the fabric transfers a stream of packets between the computing devices. Each computing device comprises a Quality of Service ('QOS') filter that monitors incoming packets to filter out packets of a maintenance type and permit transfer of packets of a transaction type.

Growing community of inventors

Cypress, TX, United States of America

David L Matthews