PCIe (Peripheral Component Interface Express) switchboard and working method thereof

Abstract

The embodiment of the invention provides a PCIe (Peripheral Component Interface Express) switchboard and a working method thereof, relating to the technical field of communication, and aiming that the PCIe switchboard is not influenced by processor reset when the PCIe switchboard forwards data. The switchboard comprises a processor, a PCIe switch chip, a clock and a power supply, wherein the PCIe switch chip comprises an uplink port and a downlink port; the PCIe switch chip is used for shielding a thermal reset command broadcasted by the processor, and the memory address space of the downlink port of the PCIe switch chip is utilized to forward the data; the processor is connected with the uplink port of the PCIe switch chip and is used for broadcasting the thermal reset command before the processor resets, carrying out device enumeration after the processor resets, and distributing the memory address space for the enumerated devices; and when the PCIe switch chip is enumerated, the processor only distributes the memory address space for the uplink port of the PCIe switch chip. The switchboard can be applied to the PCIe switching technology.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a PCIe switch and a working method thereof. Background technique [0002] With the development of PCIe (Peripheral Component Interconnect Express, Peripheral Component Interconnection Standard Extension) technology, it has become a general trend to interconnect multiple devices between boards through the PCIe protocol for data forwarding, and this technology requires the use of PCIe switches. Currently, the hardware of a PCIe switch mainly includes a processor, a memory, a PCIe switch (switch) chip, a clock, a power supply, and the like. The software of the PCIe switch mainly includes the operating system and necessary drivers and management software. Generally, a PCIe switch chip is connected with multiple forwarding devices to form a PCIe tree, and performs data forwarding for multiple devices connected to it in a P2P (point-to-point) working mode. The processor can tra...

AI Technical Summary

Problems solved by technology

[0003] During the data forwarding process of the PCIe switch, when the processor is reset due to a fault, it will broadcast a hot reset (hot reset) command throughout the PCIe tree, thereby resetting the PCIe switch chip, and the data forwarding of the PCIe switch is therefore interrupted

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