Exchange device, and peripheral component interconnection express (PCIe) system and initialization method thereof

Abstract

The invention discloses an exchange device, and a peripheral component interconnection express (PCIe) system and an initialization method thereof. The switch device comprises multiple PCIe upstream ports used for connection with at least one host; at least one PCIe downstream port used for connection with at least one I/O device; and a built-in processing apparatus connected with the at least one PCIe downstream port through an internal connecting line of the switch device, wherein the built-in processing apparatus is used for transmitting a configuration reading-writing message to the at least one PCIe downstream port through the internal connecting line; receiving a configuration reading-writing response message carrying a completion identification, transmitted by the at least one PCIe downstream port through the internal connecting line; and according to the completion identification carried by the configuration reading-writing response message, determining that the switch device is connected with an I/O device whose identification is the completion identification. The switch device, and the PCIe system and the initialization method thereof have quite high stability and reliability.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, to a switching device, a peripheral component interconnection high-speed system and an initialization method thereof. Background technique [0002] The Single-Root Input / Output Virtualization (SR-IOV) technology proposed by the Peripheral Component Interconnect Special Interest Group (PCI-SIG) is applied to multi-process shared input and output (Input / Output, In the scenario of the I / O) device, the SR-IOV technology virtualizes multiple virtual functions (VirtualFunction, VF) for the PCI high-speed (PCIexpress, PCIe) device for calling by the upper host. [0003] Multi-Root Input / Output Virtualization (Multi-RootInput / OutputVirtualization, MR-IOV) technology is applied to the scenario where multiple hosts share I / O devices. This technology virtualizes multiple PCI bus domains (VirtualHierarchies, VH) for multiple hosts to call . However, since this technology modifies th...

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Problems solved by technology

[0005] This technical solution requires an additional management CPU, and requires an external memory corresponding to the management CPU, and needs to provide a separate PCIe management interface, which is not suitable for product layout

also, figure 1 In the system 100 shown, only one management CPU is set for the management of the entire system, and the management link is single. Once the management link is abnormal, the entire network will be paralyzed and cannot be used, and the stability and reliability are low.

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