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Achievement method, non-transparent bridge and communication system for non-transparent transmission

An implementation method and communication system technology, applied in the field of non-transparent bridges and communication systems, can solve the problems of link resource occupation and large logic overhead, and achieve the effect of reducing resource occupation and logic overhead, and being easy to understand and implement

Active Publication Date: 2009-11-25
CHENGDU HUAWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] During the research and practice of the prior art, the inventors of the present invention found that since the two sides need to negotiate to determine the master and slave and configure themselves respectively, the resource occupation and Logic overhead is high

Method used

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  • Achievement method, non-transparent bridge and communication system for non-transparent transmission
  • Achievement method, non-transparent bridge and communication system for non-transparent transmission
  • Achievement method, non-transparent bridge and communication system for non-transparent transmission

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for implementing non-transparent transmission. First, establish a link between non-transparent bridges in a "root module-terminal device" connection mode, and then use this link to implement data transmission between non-transparent bridges. Such as figure 2 As shown, the specific process can be as follows:

[0032] 101. The first non-transparent bridge establishes a first link between its own root module and the terminal device interface of the second non-transparent bridge; wherein the terminal device interface is used to connect the terminal device;

[0033] Since the first non-transparent bridge and the second non-transparent bridge adopt the "root module-terminal device" connection method, the link between them can be established according to the existing PCIE protocol, and the link is initialized At this time, the side where the first non-transparent bridge is located and the side where the second non-transparent bridge is located do not need to negotiate to...

Embodiment 2

[0044] According to the method described in the embodiment, an example will be given below for further detailed description. For the convenience of description, in the embodiment of the present invention, a master-slave dual-control system will be used as an example for description, and it is assumed that the non-transparent bridge on the master side is the first non-transparent bridge, and the non-transparent bridge on the slave side is the second non-transparent bridge. Transparent bridge.

[0045] According to the PCIE protocol, the link configuration can only be initiated by the root module or the north bridge, and does not support requests from downlink to uplink. Moreover, the terminal device only responds to the module with the CRS header type of the type 0 header in the address space definition of the request address. Therefore, if the root module finds that its downstream device is a terminal device, it will send the request downstream with a type 0 header.

[0046] Accor...

Embodiment 3

[0055] The difference from the second embodiment is that in the second embodiment, a single-link "root module-terminal device" connection is established between the non-transparent bridges on both sides. A non-transparent bridge, that is, the establishment of two links between the first non-transparent bridge and the second non-transparent bridge using the "root module-terminal device" connection mode as an example for further detailed description.

[0056] Such as Figure 4 As shown, similar to the second embodiment, in the embodiment of the present invention, the processors on both sides of the master-slave dual control system, that is, the master processor and the slave processor are respectively connected to their corresponding root complexes, and then each The root complexes are connected to the terminal device interface side of the non-transparent bridge (that is, the first non-transparent bridge and the second non-transparent bridge), because the non-transparent bridges on ...

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PUM

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Abstract

The embodiment of the invention discloses an achievement method, a non-transparent bridge and a communication system for non-transparent transmission. The embodiment employs a link that establishes the connection way of root module to terminal device between the non-transparent bridges for the connection and data transmission between the bridges, and during the establishment and configuration of the link, the two sides of the link can determine the master and slave without negotiation for configuration because of the connection way of root module to terminal device, thereby reducing the resource occupation and logic overhead; moreover, such connection way is capable of being supported by the current PCIE protocol, which is easy for users to understand and achieve.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a method for realizing non-transparent transmission, a non-transparent bridge and a communication system. Background technique [0002] PCIE (PCI-Express) is a higher development of Peripheral Component Interconnect (PCI), and is the latest bus and interface standard. [0003] The basic structure of PCIE includes Root Complex, Switch and various terminal equipment (Endpoint). Among them, the root complex can be integrated in the north bridge chip (also known as the host bridge) for the connection between the processor and memory, input / output (I / O, Input / Output) devices, etc.; the switch is used for The I / O bus provides an output terminal to support peer-to-peer communication between different terminal devices. The switch includes two or more logical PCIE-to-PCIE bridges (PCIE-PCIEBridge, P2P for short) to keep the existing PCI Compatible; the terminal device is the req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46H04L29/06
CPCH04L49/00G06F13/4027
Inventor 张恩东
Owner CHENGDU HUAWEI TECH