Dynamic scanning method of pcie devices supporting multiple rcs under linux system

Abstract

The invention discloses a PCIE (peripheral component interface express) device dynamic scanning method supporting multi RC (remote control) in a Linux system. The PCIE device dynamic scanning method supporting the plurality of the multi RC in the Linux system includes: electrifying the Linux system, distributing continuous bus number resources to each RC controller according to the number of RC controllers of the Linux system, traversing each RC controller exists in the Linux system, recording bus number information corresponding to each RC controller to a global array, and deleting a default PCIE device or a default PCIE bridge device in each RC controller so as to release resources distributed by the Linux system in a default mode, and the RC controller root bus number as a judgement standard to scan or unload the PCIE device dynamic according to corresponding RC controller bus number information recorded in the global array. By adopting the PCIE device dynamic scanning method supporting the plurality of the multi RC in the Linux system, expandability of the Linux system is improved due to the fact that each RC controller and PCIE bridge device are newly distributed the continuous bus number resources, and safety of the Linux system is improved due to the fact that the scanning or unloading of the PCIE device under the RC controller root bus number is controlled separately, and simultaneously, stability of the Linux system is enhanced due to the fact that a linkage state is detected and controlled the scanning process.

Description

technical field [0001] The invention relates to the field of embedded system application technology, in particular to a dynamic scanning method for a PCIE (Peripheral Component Interconnect Express, high-speed peripheral component interconnection) device supporting multiple RCs (Rootcomplex, root components) under a Linux system. Background technique [0002] At present, the Linux system is widely used in the development of embedded products. With the development of embedded technology, the integration of product design is getting higher and higher. In high-end communication equipment, the embedded Linux system needs to support various types of PCIE Some PCIE devices need to configure their power supply and clock according to a certain sequence after the system starts normally to work normally; some PCIE devices need to be uninstalled when the system is running normally. [0003] Usually, the Linux system kernel will automatically scan PCIE devices when starting, and configu...

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Problems solved by technology

[0015] The technical problem to be solved by the present invention is the problem of low scalability, poor security and stability of the dynamic scanning and unloading technology of existing PCIE equipment

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