DEVICE LEVEL ENABLEMENT OF A COMMUNICATIONS PROTOCOL

• US 20140047110A1
• Filed: 10/22/2013
• Published: 02/13/2014
• Est. Priority Date: 09/24/2009
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Candelaria, Susan K., Hathorn, Roger G., Kalos, Matthew J., Peterson, Beth A.
• Granted Patent: US 9,584,268 B2
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 1/244 test sequence generators
• CPC Class Codes: H04L 41/0803 Configuration setting
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities

Abstract

An apparatus, system, and method are disclosed for device level enablement of a communications protocol. An adapter compatibility module determines an adapter compatibility status for a plurality of host adapters. A positive adapter compatibility status indicates that each host adapter in the plurality of host adapters is compatible with a communications protocol. A processor compatibility module determines a processor compatibility status for one or more processors. The one or more processors coordinate data transfers to and from the plurality of host adapters. A positive processor compatibility status indicates that each of the one or more processors is compatible with the communications protocol. A compatibility summary module determines a compatibility summary for the plurality of host adapters and the one or more processors. The compatibility summary indicates a positive compatibility relative to the communications protocol in response to a positive processor compatibility status and a positive adapter compatibility status.

Claims

1. An apparatus for device level enablement of a communications protocol, the apparatus comprising:

an adapter compatibility module configured to determine an adapter compatibility status for a plurality of host adapters;

a processor compatibility module configured to determine a processor compatibility status for one or more processors that coordinate data transfers to and from the plurality of host adapters; and

a compatibility summary module configured to determine a compatibility summary for the plurality of host adapters and the one or more processors, the compatibility summary indicating a positive compatibility relative to a communications protocol in response to a positive processor compatibility status indicating that each of the one or more processors is compatible with the communications protocol and a positive adapter compatibility status indicating that each host adapter in the plurality of host adapters is compatible with the communications protocol.

2. The apparatus of claim 1, further comprising a status message module configured to provide the compatibility summary to each host adapter in the plurality of host adapters, each of the plurality of host adapters configured to transmit the compatibility summary over a communications channel.

3. The apparatus of claim 2, wherein the status message module provides the compatibility summary to each host adapter in the plurality of host adapters using an internal message delivery system.

4. The apparatus of claim 2, wherein the status message module provides the compatibility summary to each host adapter in the plurality of host adapters using a peripheral component interconnect write operation that writes the compatibility summary to a host adapter.

5. The apparatus of claim 2, wherein the status message module provides the compatibility summary to each host adapter in the plurality of host adapters using a direct memory access write operation that writes the compatibility summary to a host adapter.

6. The apparatus of claim 1, further comprising a code update module configured to update one or more host adapters from the plurality of host adapters such that the one or more host adapters are compatible with the communications protocol, the one or more host adapters further configured to report a positive compatibility with the communications protocol to the adapter compatibility module in response to the update.

7. The apparatus of claim 1, further comprising a summary update module configured to update the compatibility summary in response to a change in the adapter compatibility status.

8. The apparatus of claim 7, wherein the change in the adapter compatibility status comprises an addition of a host adapter to the plurality of host adapters that is incompatible with the communications protocol.

9. The apparatus of claim 1, wherein the compatibility summary comprises one or more compatibility flags.

10. The apparatus of claim 9, wherein each of the plurality of host adapters is configured to transmit the one or more compatibility flags over a communications channel during a handshake procedure.

11. The apparatus of claim 10, wherein the handshake procedure comprises a fibre process login procedure, and each of the plurality of host adapters are configured to transmit the one or more compatibility flags over the communications channel in a process login response.

12. The apparatus of claim 1, wherein the one or more processors comprise at least two groups of symmetric multiprocessors, each group of symmetric multiprocessors reporting a group compatibility status to the processor compatibility module.

13. The apparatus of claim 12, wherein each group of symmetric multiprocessors comprises a central electronic complex that coordinates data transfers between the plurality of host adapters and one or more data storage devices.

14. The apparatus of claim 1, wherein each host adapter in the plurality of host adapters comprises a fibre channel host adapter.

15. The apparatus of claim 14, wherein the communications protocol comprises a fibre channel extension protocol that comprises an additional feature over an existing fibre channel protocol, and the communications channel comprises a fibre communications channel.

16. A system for device level enablement of a communications protocol, the system comprising:

a plurality of host adapters, each host adapter configured to store a compatibility summary and to transmit the compatibility summary over a communications channel;

one or more processors configured to coordinate data transfers to and from the plurality of host adapters;

a protocol compatibility module comprising,

an adapter compatibility module configured to determine an adapter compatibility status for the plurality of host adapters;

a processor compatibility module configured to determine a processor compatibility status for the one or more processors; and

a compatibility summary module configured to determine the compatibility summary for the plurality of host adapters and the one or more processors, the compatibility summary indicating a positive compatibility relative to a communications protocol in response to a positive processor compatibility status indicating that each of the one or more processors is compatible with the communications protocol and a positive adapter compatibility status indicating that each host adapter in the plurality of host adapters is compatible with the communications protocol.

17. The system of claim 16, further comprising one or more data storage repositories, wherein the data transfers to and from the plurality of host adapters comprise data transfers between the one or more data storage repositories and the plurality of host adapters.

18. The system of claim 16, wherein the protocol compatibility module further comprises a status message module configured to provide the compatibility summary to each host adapter in the plurality of host adapters.

19. A computer program product comprising a computer readable storage medium having computer usable program code executable to perform operations for device level enablement of a communications protocol, the operations of the computer program product comprising:

determining an adapter compatibility status for a plurality of host adapters;

determining a processor compatibility status for one or more processors that coordinate data transfers to and from the plurality of host adapters; and

determining a compatibility summary for the plurality of host adapters and the one or more processors, the compatibility summary indicating a positive compatibility relative to a communications protocol in response to a positive processor compatibility status indicating that each of the one or more processors is compatible with the communications protocol and a positive adapter compatibility status indicating that each host adapter in the plurality of host adapters is compatible with the communications protocol.

20. The computer program product of claim 19, further comprising providing the compatibility summary to each host adapter in the plurality of host adapters, each of the plurality of host adapters configured to transmit the compatibility summary over a communications channel.

21. The computer program product of claim 19, wherein each host adapter in the plurality of host adapters comprises a fibre channel host adapter and the one or more processors comprise at least two groups of symmetric multiprocessors, each group of symmetric multiprocessors reporting a group compatibility status to the processor compatibility module.

22. A method for device level enablement of a communications protocol, the method comprising:

determining an adapter compatibility status for a plurality of host adapters;

determining a processor compatibility status for one or more processors that coordinate data transfers to and from the plurality of host adapters; and

determining a compatibility summary for the plurality of host adapters and the one or more processors, the compatibility summary indicating a positive compatibility relative to a communications protocol in response to a positive processor compatibility status indicating that each of the one or more processors is compatible with the communications protocol and a positive adapter compatibility status indicating that each host adapter in the plurality of host adapters is compatible with the communications protocol.

23. The method of claim 22, further comprising providing the compatibility summary to each host adapter in the plurality of host adapters, each of the plurality of host adapters configured to transmit the compatibility summary over a communications channel.

24. The method of claim 22, wherein each host adapter in the plurality of host adapters comprises a fibre channel host adapter and the one or more processors comprise at least two groups of symmetric multiprocessors, each group of symmetric multiprocessors reporting a group compatibility status to the processor compatibility module.

25. A system for device level enablement of a communications protocol, the system comprising:

one or more data storage devices;

a plurality of fibre channel host adapters, each host adapter configured to store a compatibility flag and to transmit the compatibility flag over a fibre communications channel during a fibre process login handshake procedure;

one or more central electronic complexes, each central electronic complex comprising a plurality of processors configured to coordinate data transfers between the plurality of host adapters and the one or more data storage devices;

a protocol compatibility module comprising,

an adapter compatibility module configured to determine an adapter compatibility status for the plurality of host adapters, a positive adapter compatibility status indicating that each host adapter in the plurality of host adapters is compatible with a fibre channel extension protocol;

a processor compatibility module configured to determine a processor compatibility status for each of the one or more central electronic complexes, a positive processor compatibility status indicating that each processor from a central electronic complex is compatible with the fibre channel extension protocol; and

a compatibility summary module configured to determine the compatibility flag for the plurality of host adapters and the one or more central electronic complexes, the compatibility flag indicating a positive compatibility relative to the fibre channel extension protocol in response to a positive compatibility status indicating that each of the one or more processors is compatible with the communications protocol and a positive adapter compatibility status indicating that each host adapter in the plurality of host adapters is compatible with the communications protocol.