Method and apparatus for providing channel bonding and clock correction arbitration

• US 7,404,023 B1
• Filed: 01/14/2005
• Issued: 07/22/2008
• Est. Priority Date: 01/14/2005
• Status: Active Grant

• Current Assignee: Xilinx, Inc. (Advanced Micro Devices, Inc.)
• Original Assignee: Xilinx, Inc. (Advanced Micro Devices, Inc.)
• Inventors: Kaszynski, Robert J.
• Primary Examiner(s): KNOLL, CLIFFORD H
• Application Number:
  US11/036,495
• Time in Patent Office: 1,285 Days
• Field of Search: 375/219, 375/372, 709/238, 710/240
• US Class Current: 710/240
• CPC Class Codes: G06F 13/362 with centralised access control

Abstract

A method and apparatus for providing channel bonding and clock correction arbitration in integrated circuits are disclosed. An arbitration device analyzes indicators to determine when clock correction request or a channel bonding request occur simultaneously. Then, the arbitration device determines whether to service the simultaneously occurring clock correction request first or a channel bonding request first based upon user selected arbitration logic.

Claims

1. A method for providing channel bonding and clock correction arbitration in a programmable logic device, comprising:

analyzing indicators to determine when clock correction request or a channel bonding request occur simultaneously; and

determining whether to service the simultaneously occurring clock correction request first or a channel bonding request first based upon user selected arbitration logic.

2. The method of claim 1 further comprising modifying by a user the arbitration logic for controlling whether to service a clock correction request first or a channel bonding request first.

3. The method of claim 1 further comprising providing received data to an elastic buffer and controlling the buffer according to the determining whether to service the simultaneously occurring clock correction request first or a channel bonding request first.

4. The method of claim 1, wherein the determining whether to service a clock correction request first or a channel bonding request first comprises preventing packet corruption caused by match characters with insufficient spacing by causing a channel bonding request to be serviced first.

5. The method of claim 1, wherein the determining whether to service a clock correction request first or a channel bonding request first comprises generating packet buffer threshold indications for controlling received data in an elastic buffer.

6. The method of claim 1, wherein the determining whether to service the simultaneously occurring clock correction request first or a channel bonding request first based upon user selected arbitration logic further comprises selecting to process channel bonding requests first when the user configures the arbitration logic to service channel bonding requests first.

7. The method of claim 1, wherein the determining whether to service the simultaneously occurring clock correction request first or a channel bonding request first based upon user selected arbitration logic further comprises selecting to process clock correction requests first when the user configures the arbitration logic to service clock correction requests first.

8. The method of claim 1, wherein the determining whether to service the simultaneously occurring clock correction request first or a channel bonding request first based upon user selected arbitration logic further comprises rotating the selection of clock correction requests and channel bonding requests when the user configures the arbitration logic to service clock correction requests and channel bonding requests on a rotating basis.

9. A transceiver for receiving and transmitting data, the transceiver comprising:

an elastic buffer for receiving and buffering data therein; and

an arbitration device, operatively coupled to the elastic buffer, the arbitration device controlling overflow and underflow of the buffer, the arbitration device configured to analyze indicators to determine when a clock correction request and a channel bonding request occur simultaneously and to determine whether to service the clock correction request first or the channel bonding request first based upon user selected arbitration logic.

10. The transceiver of claim 9, wherein the arbitration device is configurable by a user to control whether to service a clock correction request first or a channel bonding request first.

11. The transceiver of claim 9 further comprises match logic device for detecting match characters.

12. The transceiver of claim 11, wherein the arbitration device determines whether to service a clock correction request first or a channel bonding request first to prevent packet corruption caused by match characters detected by the match logic device to have insufficient spacing by causing a channel bonding request to be serviced first.

13. The transceiver of claim 9 further comprises a threshold calculation device for generating packet buffer threshold indications for controlling received data in an elastic buffer.

14. The transceiver of claim 9, wherein the arbitration device is configurable to process channel bonding requests first.

15. The transceiver of claim 9, wherein the arbitration device is configurable to process clock correction requests first.

16. The transceiver of claim 9, wherein the arbitration device is configurable to rotate selection of clock correction requests and channel bonding requests.

17. A programmable logic device, comprising:

input/output blocks (IOBs) for providing interconnections between elements;

configurable logic blocks (CLBs) for implementing logical functions of the programmable logic device; and

a transceiver for receiving and transmitting data, the transceiver comprising;

an elastic buffer for receiving and buffering data therein; and

an arbitration device, operatively coupled to the elastic buffer, the arbitration device controlling overflow and underflow of the buffer, the arbitration device configured to analyze indicators to determine when a clock correction request and a channel bonding request occur simultaneously and to determine whether to service the clock correction request first or the channel bonding request first based upon user selected arbitration logic.

18. The programmable logic device of claim 17, wherein the arbitration device is configurable by a user to control whether to service a clock correction request first or a channel bonding request first.

19. The programmable logic device of claim 17 further comprises a match logic device for detecting match characters.

20. The programmable logic device of claim 19, wherein the arbitration device determines whether to service a clock correction request first or a channel bonding request first to prevent packet corruption caused by match characters detected by the match logic device to have insufficient spacing by causing a channel bonding request to be serviced first.

21. The programmable logic device of claim 17 further comprises a threshold calculation device for generating packet buffer threshold indications for controlling received data in an elastic buffer.

22. The programmable logic device of claim 17, wherein the arbitration device is configurable to process channel bonding requests first.

23. The programmable logic device of claim 17, wherein the arbitration device is configurable to process clock correction requests first.

24. The programmable logic device of claim 17, wherein the arbitration device is configurable to rotate selection of clock correction requests and channel bonding requests.

25. An article of manufacture, comprising:

a program storage medium readable by a computer, the medium tangibly embodying one or more programs of instructions executable by the computer to perform operations for providing channel bonding and clock correction arbitration in field programmable gate arrays, comprising;

analyzing indicators to determine when clock correction request or a channel bonding request occur simultaneously; and

determining whether to service the simultaneously occurring clock correction request first or a channel bonding request first based upon user selected arbitration logic.