Method and apparatus for processing received network packets on a network interface for a computer
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-015/16
H04L-029/06
H04L-012/54
H04L-029/12
H04L-012/801
H04L-012/805
H04L-012/863
H04L-012/861
H04L-012/879
H04L-029/08
출원번호
US-0899299
(2013-05-21)
등록번호
US-9009223
(2015-04-14)
발명자
/ 주소
Boucher, Laurence B.
Blightman, Stephen E. J.
Craft, Peter K.
Higgen, David A.
Philbrick, Clive M.
Starr, Daryl D.
출원인 / 주소
Alacritech, Inc.
대리인 / 주소
Lauer, Mark
인용정보
피인용 횟수 :
0인용 특허 :
252
초록▼
An intelligent network interface card (INIC) or communication processing device (CPD) works with a host computer for data communication. The device provides a fast-path that avoids protocol processing for most messages, greatly accelerating data transfer and offloading time-intensive processing task
An intelligent network interface card (INIC) or communication processing device (CPD) works with a host computer for data communication. The device provides a fast-path that avoids protocol processing for most messages, greatly accelerating data transfer and offloading time-intensive processing tasks from the host CPU. The host retains a fallback processing capability for messages that do not fit fast-path criteria, with the device providing assistance such as validation even for slow-path messages, and messages being selected for either fast-path or slow-path processing. A context for a connection is defined that allows the device to move data, free of headers, directly to or from a destination or source in the host. The context can be passed back to the host for message processing by the host. The device contains specialized hardware circuits that are much faster at their specific tasks than a general purpose CPU. A preferred embodiment includes a trio of pipelined processors devoted to transmit, receive and utility processing, providing full duplex communication for four Fast Ethernet nodes.
대표청구항▼
1. A method of network communication for a network interface that is coupled to a computer by an input/output (I/O) bus, the method comprising: running, on the computer, a protocol processing stack including an Internet Protocol (IP) layer and a Transmission Control Protocol (TCP) layer, with an upp
1. A method of network communication for a network interface that is coupled to a computer by an input/output (I/O) bus, the method comprising: running, on the computer, a protocol processing stack including an Internet Protocol (IP) layer and a Transmission Control Protocol (TCP) layer, with an upper layer running above the TCP layer;maintaining, on the network interface, a TCP control block (TCB);receiving, by the network interface, a network packet having an IP header, a TCP header, and an upper layer header;processing the packet by the network interface, including parsing the IP header and TCP header to associate the packet with the TCB;updating, by the network interface, the TCB to reflect receiving the packet; andparsing, by the network interface, the upper layer header to determine a length of data being received in a plurality of network packets that correspond to the TCB and include the network packet. 2. A system for communication over a network, the system comprising: a computer running a protocol processing stack including an Internet Protocol (IP) layer and a Transmission Control Protocol (TCP) layer, with an upper layer running above the TCP layer; anda network interface that is coupled to the computer by an input/output (I/O) bus, the network interface including a memory storing a TCP control block (TCB) and a mechanism adapted to parse IP and TCP headers of received network packets to determine whether the received network packets correspond to the TCB, the mechanism adapted to parse an upper layer header of one of the received network packets to determine a length of data being received in the plurality of the packets that correspond to the TCB. 3. A network interface that is coupled to a computer by an input/output (I/O) bus, the network interface comprising: hardware adapted to parse Internet Protocol (IP) headers and Transmission Control Protocol (TCP) headers of received network packets to determine whether the received network packets correspond to a TCP control block (TCB) being stored on the network interface, and hardware adapted to parse an upper layer header of one of the received network packets to determine a length of data being received in a plurality of the packets that correspond to the TCB. 4. The method of claim 1, including sending the length that was determined by the network interface from the network interface to the computer. 5. The method of claim 1, including sending the data from the network interface to a buffer of the computer. 6. The method of claim 5, including allocating the buffer by a layer above the TCP layer. 7. The method of claim 1, including sending the data from the network interface to the computer without sending any IP headers or TCP headers of the plurality of network packets from the network interface to the computer. 8. The method of claim 1, including allocating a buffer of the computer based upon the length that was determined by the network interface. 9. The method of claim 1, including using the length that was determined by the network interface to determine when all of the data has been received by the network interface. 10. The method of claim 1, including using the length that was determined by the network interface to decide whether to send the data from the network interface to the computer immediately or to wait to send the data until after the network interface has received from the computer a location in a memory of the computer in which to store the data. 11. The system of claim 2, wherein the network interface includes a processor that accesses the TCB. 12. The system of claim 2, wherein the mechanism that is adapted to parse the headers of the received network packets includes specialized network processing hardware. 13. The system of claim 2, wherein the network interface includes a processor that accesses the TCB. 14. The system of claim 2, wherein the computer includes a memory buffer that is allocated for storing the data. 15. The system of claim 2, wherein the network interface includes a direct memory access (DMA) engine that is adapted to store the data in a memory buffer of the computer. 16. The network interface of claim 3, including a processor that accesses the TCB. 17. The network interface of claim 3, including a direct memory access (DMA) engine that is adapted to store the data in a memory buffer of the computer.
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