Offloading processing tasks to a peripheral device

• US 20070098010A1
• Filed: 10/28/2005
• Published: 05/03/2007
• Est. Priority Date: 10/28/2005
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Dabagh, Alireza, Dube, Aditya, Liu, Fengfen
• Granted Patent: US 7,656,894 B2
• Time in Patent Office: Days
• US Class Current: 370/463
• CPC Class Codes: G06F 2209/509 Offload
• CPC Class Codes: G06F 9/5044 considering hardware capabilities
• CPC Class Codes: H04L 69/32 Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level

Abstract

In one embodiment, to determine what tasks may be offloaded to a peripheral hardware device (e.g., to be performed in hardware on the peripheral device, rather than on the CPU(s) of the host computer), an indication from the at least one peripheral hardware device may be provided, without the peripheral hardware device first being queried to determine the task offload capabilities provided by the peripheral hardware device. In another embodiment, a data packet may be sent to the at least one peripheral device with an indication to the at least one peripheral device to perform at least one task offloading capability on the data packet, without first sending a command to the at least one peripheral device to enable the at least one task offloading capability.

Claims

1. In a computer system having at least one software component and at least one peripheral hardware device, a method comprising:

receiving, at the at least one software component, an indication from the at least one peripheral hardware device of the task offloading capabilities of the at least one peripheral device, without the at least one software component initiating a query to determine the task offload capabilities of the peripheral hardware device.

2. The method of claim 1, further comprising:

experiencing a change in the task offloading capabilities of the at least one peripheral device; and

receiving, at the at least one software component, an indication of the change in the offloading capabilities of the at least one peripheral device.

3. The method of claim 1, wherein the at least one peripheral device is at least one network interface card.

4. The method of claim 1, wherein the at least one software component is part of an operating system that executes on the computer system.

5. The method of claim 1, wherein the at least one software component is an interface to a network protocol.

6. The method of claim 1, wherein the task offloading capabilities include at least one of the group comprising:

checksum calculation offloading, large packet segmentation offloading, and encryption offloading.

7. The method of claim 1, further comprising:

sending a data packet from the at least one software component to the at least one peripheral device with an indication to the at least one peripheral device to perform at least one of the task offloading capabilities on the data packet.

8. At least one computer-readable medium encoded with instructions that, when executed on a computer system having at least one software component and at least one peripheral hardware device, perform a method comprising:

receiving, at the at least one software component, an indication from the at least one peripheral hardware device of the task offloading capabilities of the at least one peripheral device, without the at least one software component initiating a query to determine the task offload capabilities of the peripheral hardware device.

9. The at least one computer readable medium of claim 8, wherein the method further comprises:

experiencing a change in the task offloading capabilities of the at least one peripheral device; and

receiving, at the at least one software component, an indication of the change in the offloading capabilities of the at least one peripheral device.

10. The at least one computer readable medium of claim 8, wherein the at least one peripheral device is at least one network interface card.

11. The at least one computer readable medium of claim 8, wherein the at least one software component is part of an operating system that executes on the computer system.

12. The at least one computer readable medium of claim 8, wherein the at least one software component is an interface to a network protocol.

13. The at least one computer readable medium of claim 8, wherein the task offloading capabilities include at least one of the group comprising:

checksum calculation offloading, large packet segmentation offloading, and encryption offloading.

14. The at least one computer readable medium of claim 8, wherein the method further comprises:

sending a data packet from the at least one software component to the at least one peripheral device with an indication to the at least one peripheral device to perform at least one of the task offloading capabilities on the data packet.

15. In a computer system having at least one software component and at least one peripheral hardware device having at least one task offloading capability, a method comprising:

sending a data packet from the at least one software component to the at least one peripheral device with an indication to the at least one peripheral device to perform the at least one task offloading capability on the data packet, without first sending a command to the at least one peripheral device to enable the at least one task offloading capability in the at least one peripheral device.

16. The method of claim 15, wherein the at least one peripheral device is at least one network interface card.

17. The method of claim 15, wherein the at least one software component is part of an operating system that executes on the computer system.

18. The method of claim 15, wherein the at least one software component is an interface to a network protocol.

19. The method of claim 15, wherein the at least one task offloading capability includes at least one of the group comprising:

checksum calculation offloading, large packet segmentation offloading, and encryption offloading.

20. The method of claim 15, wherein the indication to the at least one peripheral device to perform the at least one task offloading capability is provided in a net buffer list that includes metadata about data in the data packet.