Method and device for online adjusting link parameter

Abstract

An embodiment of the invention discloses a method and a device for online adjusting a link parameter. The method comprises the following steps that: for a data transmission link established between two PCIe chips, the number of link errors recorded in a register of two PCIe chips can be real-time monitored through a PCIe link online adjustment logic module; a target value of the link error is obtained according to the number of link errors recorded in the register; and when the target value exceeds a threshold value, which means that the link parameter is already not suitable for demand of a current link, a request for adjusting the link parameter is sent to an equalizer, so as to trigger the equalizer to enter a link parameter adjustment mode. It can be appreciated that according to the technical solution of the method and the device, the online adjustment of the link parameter can be implemented, therefore, reliability of the link under different conditions is ensured.

Description

technical field [0001] The invention relates to the technical field of high-speed links, in particular to a method and device for online adjustment of link parameters. Background technique [0002] PCIe belongs to high-speed serial point-to-point dual-channel high-bandwidth transmission. The connected devices allocate exclusive channel bandwidth and do not share bus bandwidth. It mainly supports active power management, error reporting, end-to-end reliable transmission, hot swapping and quality of service ( QOS) and other functions. Its main advantage is the high data transmission rate, the current highest 16X 2.0 version can reach 10GB / s, and there is still considerable development potential. PCI Express also has a variety of specifications, from PCI Express 1X to PCI Express 16X, which can meet the needs of low-speed devices and high-speed devices that will appear in a certain period of time in the future. The latest interface of PCI-Express is the PCIe 3.0 interface, wh...

AI Technical Summary

Problems solved by technology

[0003] However, during the operation process after the link is established, due to changes in the environment, link, chip and other uncertain factors, the optimal parameters initially adjusted cannot fully guarantee the reliability of the link under any circumstances.

That is, the link parameters initially set may not be suitable for the requirements of the current link. If the link still operates according to the link parameters set initially, the reliability of the link will be affected

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