PCIe link quick starting method and device

Abstract

The invention provides a PCIe (Peripheral Component Interconnect Express) link quick starting method, which is applied to an abnormal starting process of a system and comprises the following steps of: configuring an equalization mode of a PCIe link into a mode of skipping an equalization Skip EQ (Skip Equal Quality); reading an equalization EQ parameter stored during the last starting; and applying the equalization EQ parameter stored in the last starting to the current PCIe link. An automatic equalization Auto EQ process is executed by adopting a first starting process after a hardware environment is changed, and a current equalization EQ parameter is stored into a nonvolatile memory NVRAM of a basic input / output system BIOS; when the system is started abnormally, the link signal equalization mode is selected, and the previous starting parameter is used, so that the starting time for link retraining is greatly reduced. The technology can be used for quickly starting the equipment, reducing the abnormal starting time of the server, and also can be used for PCIe link stability verification.

Description

technical field [0001] The invention relates to the technical field of CPU processors, in particular to a PCIe link quick start method and device. Background technique [0002] During the startup process of the PCIe link, due to the need to balance different rate points during the startup process, as the bandwidth of the PCIe link increases, the startup time is also getting longer, especially since November 2011, PCIe4. After the advent of the PCIe 0 protocol, the bandwidth has doubled compared with PCIe3. However, for some scenarios that require fast startup, the longer startup time of the PCIe link will have a very bad impact on user experience. Therefore, shortening the link startup time is particularly important. Contents of the invention [0003] The method and device for starting the PCIe link provided by the present invention can quickly start the PCIe link and improve the starting efficiency. [0004] In the first aspect, the present invention provides a PCIe lin...

AI Technical Summary

Problems solved by technology

[0002] During the startup process of the PCIe link, due to the need to balance different speed points during the startup process, as the bandwidth of the PCIe link increases, the startup time is also getting longer, especially since November 2011, PCIe4. 0 protocol, the bandwidth is doubled compared with PCIe3.

However, for some scenarios that require fast startup, the longer startup time of the PCIe link will have a very bad impact on user experience, so shortening the link startup time is particularly important

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