Method and system for processing network and storage data

• US 7,720,064 B1
• Filed: 12/21/2007
• Issued: 05/18/2010
• Est. Priority Date: 12/21/2007
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: QLogic Corporation (Marvell Technology Group Limited)
• Inventors: Rohde, Derek
• Primary Examiner(s): Shah; Chirag G
• Assistant Examiner(s): Van; Jenkey
• Application Number:
  US11/963,566
• Time in Patent Office: 879 Days
• Field of Search: None
• US Class Current: 370/389
• CPC Class Codes: G06F 13/102 where the programme performs an interfacing function, e.g. device driver G06F13/105 takes precedence; scheduling within device drivers G06F9/52; contention policies within device drivers G06F9/4881
• 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 69/12 Protocol engines
• 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
• CPC Class Codes: H04L 69/323 in the physical layer [OSI layer 1]
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC

Abstract

Method and system for transmitting data using a network protocol and a storage protocol via an adapter is provided. The method includes receiving an input output control block (IOCB) from a host system for transferring data stored in a host system memory; acquiring data from the host system memory; copying a header template in a local memory of the adapter, wherein the header template is created by a driver executed by the host system; creating a header for the network protocol and a header for the storage protocol; wherein a first module for the adapter creates the network protocol packet header and the first modules uses an assist module to create the storage protocol packet header; and creating a packet to transfer a portion of the acquired data, wherein a packet size is based on a payload size for the storage.

Claims

1. A method for transmitting data using a network protocol and a storage protocol via an adapter, comprising:

receiving an input output control block (IOCB) from a host system for transferring data stored in a host system memory, the IOCB including a field indicative of offload processing to be performed by the adapter, wherein the adapter receives the IOCB;

determining if the offload processing operation is to be performed by the adapter based upon the field indicative of offload processing;

acquiring data from the host system memory, wherein the adapter acquires the data from the host system based on a memory address embedded in the IOCB;

copying a header template from the host system memory to a local memory of the adapter, wherein the header template is created by a driver executed by the host system;

using the copied header template, creating a header for the network protocol and a header for the storage protocol;

wherein a first module for the adapter creates the network protocol packet header and the first module uses an assist module to create the storage protocol packet header;

creating a packet to transfer a portion of the acquired data, wherein a packet size is based on a payload size for the storage protocol indicated by a field in the IOCB; and

transmitting data packets until a sequence offload is complete.

2. The method of claim 1, further comprising:

decrementing a data monitoring counter every time a packet is sent.

3. The method of claim 2, further comprising:

sending data packets until the data monitoring counter indicates that all the packets have been transmitted.

4. The method of claim 1, wherein the adapter is a Fibre Channel over Ethernet (FCOE) adapter.

5. The method of claim 4, wherein the network protocol is Ethernet and the storage protocol is Fibre Channel.

6. The method of claim 4, wherein the first module is an Ethernet core and the assist module is a Fibre Channel assist module.

7. The method of claim 4, wherein the adapter creates FCOE packets that are trans-mitted over an Ethernet network link.

8. The method of claim 2, wherein the data monitoring counter is maintained by the adapter.

9. A system for transmitting data using a network protocol and a storage protocol, comprising:

a host system, the host system creates an input output control block (IOCB) to transfer data stored in the host system memory, the IOCB including a field indicative of offload processing to be performed by an adapter coupled to the host system;

a driver executed in the host system creates a header template for each sequence for transferring the data; and

the adapter coupled to a network link, the adapter (a) receives the IOCB from the host system and determines if the offload processing operation is to be per-formed based upon the field indicative of offload processing;

(b) copies the data and the header template from the host system memory to a local adapter memory;

(c) uses the copied header template and creates a header for the network protocol using a network processing module and a header for the storage protocol using a storage assist module, (d) creates individual packets whose size are limited by a payload size indicated by a field in the IOCB; and

(e) transmits the packets to a destination via a network interface using the network link.

10. The system of claim 9, wherein the adapter maintains a data monitoring counter, which is decremented every time a packet is sent via a network link and data packets are sent until the data monitoring counter indicates that all the packets have been transmitted.

11. The system of claim 9, wherein the adapter is a Fibre Channel over Ethernet (FCOE) adapter.

12. The system of claim 11, wherein the network protocol is Ethernet and the storage protocol is Fibre Channel.

13. The system of claim 11, wherein the first module is an Ethernet core and the assist module is a Fibre Channel assist module.

14. The system of claim 11, wherein the adapter creates FCOE packets that are transmitted over an Ethernet network link.

15. An adapter for transmitting data using a network protocol and a storage protocol, comprising:

an interface for communicating with a host system that is configured to create an input output control block (IOCB) to transfer data stored in the host system memory, the IOCB including a field indicative of offload processing to be performed by the adapter and executes a driver for creating a header template for each sequence for transferring the data;

a core module that copies the data and the header template from the host system memory to a local adapter memory; and

creates a header for the network protocol, using the copied header template; and

a storage protocol assist module that creates a header for the storage protocol, using the copied header template and interfaces with the core module;

wherein the core module creates individual packets whose size are limited by a payload size indicated by a field in the IOCB; and

transmits the packets to a destination via a network interface using a network link.

16. The adapter of claim 15, wherein a data monitoring counter maintained by the adapter is decremented every time a packet is sent via the network link and data packets are sent until the data monitoring counter indicates that all the packets have been transmitted.

17. The adapter of claim 15, wherein the adapter is a Fibre Channel over Ethernet (FCOE) adapter.

18. The adapter of claim 17, wherein the network protocol is Ethernet and the storage protocol is Fibre Channel.

19. The adapter of claim 17, wherein the core module is an Ethernet core and the assist module is a Fibre Channel assist module.

20. The adapter of claim 17, wherein the adapter creates FCOE packets that are trans-mitted over an Ethernet network link.