Integrated network interface supporting multiple data transfer protocols

• US 20050066045A1
• Filed: 09/03/2003
• Published: 03/24/2005
• Est. Priority Date: 09/03/2003
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Chang, Kiwon, Johnson, Neil James, Clayton, Shawn Adam
• Application Number:
  US10/653,767
• Publication Number:
  US 20050066045A1
• Time in Patent Office: Days
• US Class Current: 709/230
• CPC Class Codes: H04J 3/0688 Change of the master or reference, e.g. take-over or failure of the master
• CPC Class Codes: H04L 43/0894 Packet rate
• CPC Class Codes: H04L 43/18 Protocol analysers
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols

Abstract

An integrated network interface device that supports data exchange in two or more high-speed network data transfer protocols that are based on different standards of network data transfer architectures, wherein an incoming data stream formatted in accordance with a particular network data transfer standard is processed into data not subject to the network data transfer standard to be output for further processing by a host. In one aspect, a network interface device is provided with a set of shared or common protocol independent physical link components that are used to identify the operating protocol of the incoming data, and a set of dynamically or statically re-configurable, shared or common protocol independent data transfer processing components that support data exchange via the physical link components for all the supported protocols, which may include a protocol specific link interface for each supported protocol.

Claims

1. An integrated network interface device, comprising:

protocol specific components capable of separately supporting data exchanges with a network in at least two supported protocols based on different network data transfer standards; and

protocol independent components capable of working in conjunction with the protocol specific components to process data exchanges in the supported protocols;

wherein the protocol specific components and protocol independent components are configured to enable data exchanges with the network based on at least one of the supported protocols, wherein a data stream received from the network which is based on a protocol in accordance with a particular network data transfer standard is processed into data not subject to any network data transfer standard.

2. The integrated network interface device as in claim 1, wherein at least two sets of protocol independent components are provided, each working in conjunction with a protocol specific component.

3. The integrated network interface device as in claim 2, wherein the different network data transfer standards are high speed standards allowing data exchanges at speeds at least on the order of 10 Gbits/s.

4. The integrated network interface device as in claim 1, wherein the protocol independent components are common to the protocol specific components.

5. The integrated network interface device as in claim 4, wherein the protocol independent components comprise physical link components that apply a reference data rate corresponding to the protocol of the data stream.

6. The integrated network interface device as in claim 5, wherein the protocol independent components comprise a re-configurable protocol independent data transfer processing component that support data exchange via the physical link components for the supported protocols.

7. The integrated network interface device as in claim 6, wherein the protocol specific components include a protocol specific link interface for each supported protocol, and wherein the protocol specific link interface corresponding to the protocol of the data stream receives the data stream from the physical link components at the corresponding reference data rate.

8. The integrated network interface device as in claim 6, wherein the physical link components are configured to identify the protocol of the data stream;

and

wherein the protocol independent data transfer processing component is structured to be configurable dynamically to operate in accordance with the protocol of the data stream identified by the physical link components.

9. The integrated network interface device as in claim 8, wherein the physical link components set the corresponding reference data rate for the identified protocol of the data stream.

10. The integrated network interface device as in claim 9, wherein the physical link components comprise a component for generating different reference clock signals for each supported protocol.

11. The integrated network interface device as in claim 6, wherein the physical link components further comprise a link monitor and speed selector component.

12. The integrated network interface device as in claim 11, wherein the link monitor and speed selector component comprises:

means for monitoring the presence of the data stream;

means for recovering actual data frequency of the data stream;

means for providing reference clock rates;

means for selecting a reference clock rate to be based for a reference data frequency for the data stream;

means for locking the data stream to a reference data frequency based on the selected reference clock rate;

means for matching the locked reference data frequency to the actual data frequency of the data stream; and

means for determining a link condition for the data stream if there is a match.

13. The integrated network interface device as in claim 6, wherein the protocol independent components further comprise a protocol independent media interface layer component for handling the data stream at a frame level.

14. The integrated network interface device as in claim 6, wherein the protocol independent data transfer processing component comprises one or more protocol independent processing units for receiving and implementing firmware code for protocol specific processing of the data stream.

15. The integrated network interface device as in claim 14, wherein the protocol independent data transfer processing component is implemented in an ASIC.

16. The integrated network interface device as in claim 6, wherein the protocol independent data transfer processing component is structured to be configurable statically to set the physical link components to work with one of the supported protocols prior to receiving the data stream.

17. The integrated network interface device as in claim 16, wherein the protocol independent data transfer processing component is structured to be configurable statically by configuration of at least one of hardware, software and firmware.

18. The integrated network interface device as in claim 17, wherein the protocol independent data transfer processing component is structured to be configurable statically by at least one of a user or a manufacturer.

19. The integrated network interface device as in claim 1, further comprising a host bus interface.

20. A multi-protocol network device comprising:

an integrated network interface device as in claim 1;

and

a host interface for interfacing the integrated network interface device with a host network element.

21. The multi-protocol network device as in claim 20, wherein the integrated network interface device and the host interface are implemented on a host bus adaptor (HBA).

22. A multi-protocol network device as in claim 20, wherein the host interface is a PCI bus interface.

23. A network element comprising:

the multi-protocol network device as in claim 20;

and

system components, including a system bus to which the multi-protocol network device is interfaced.

24. The network element as in claim 23, wherein the multi-protocol network device is configured as a host bus adaptor (HBA).

25. The network element as in claim 24, wherein the system bus is a PCI bus.

26. The network element as in claim 23, wherein the network element is configured as at least one of a server computer and a storage device.

27. A storage area network (SAN) comprising:

a data exchange network; and

the server computer of claim 26 and one or more storage devices coupled to the data exchange network using the integrated network interface device in the server computer.

28. The storage area network (SAN) as in claim 26, wherein the data exchange network is structure to support different data exchange protocols based on block level, frame and/or packet-based protocols.

29. The storage area network (SAN) as in claim 28, wherein the data exchange network is structure to support data exchange protocols based on at least two of the following network data transfer standards:

fibre channel (FC), iSCSI, and Ethernet.

30. A method of interfacing a network interface device to a network, comprising the steps of:

providing protocol specific components capable of separately supporting data exchanges with a network in at least two supported protocols based on different network data transfer standards;

providing protocol independent components capable of working in conjunction with the protocol specific components to process data exchanges in the supported protocols;

configuring the protocol specific components and protocol independent components to enable data exchanges with the network based on at least one of the supported protocols; and

processing a data stream received from the network which is based on a protocol in accordance with a particular network data transfer standard into data not subject to any network data transfer standard.

31. The method of claim 30, further comprising the step of identifying the protocol of the data stream, wherein the step of configuring the protocol independent components configures the protocol independent components dynamically to operate in accordance with the identified protocol of the data stream.

32. The method of claim 30, wherein the step of configuring the protocol independent components configures the protocol independent components statically to set the protocol independent components to work with one of the supported protocols prior to receiving the data stream.

33. A method of storage area networking, comprising the steps of:

providing one or more storage devices in a data exchange network;

providing a server computer having an network interface device;

interfacing the network interface device with the data exchange network using the method of claim 30.