PCI (peripheral component interconnect) resource traversal method and system

Abstract

A PCI (peripheral component interconnect) resource traversal method comprises the following steps of: according to a PCI data structure stored in a kernel system, acquiring data information of a PCI main bus, and setting the PCI main bus as a current PCI bus; scanning all PCI devices under the current PCI bus; recording all the PCI devices, recording relevant information of positions of the PCI devices at the PCI bus into a single data structural body; judging whether bridges exist in the PCI devices; when the bridges exist in the PCI devices, judging whether all the bridges are not connected with downlink buses; and when the bridges are connected with the downlink buses, acquiring the downlink buses connected on all the bridges one by one, and setting the downlink buses as the current PCI buses one by one. The invention further provides a PCI resource traversal system. Through the PCI resource traversal method and the PCI resource traversal system, PCI resource traversal can be quickly realized, and resources of a computer can be saved safely and reliably.

Description

technical field [0001] The invention relates to a PCI resource traversal method and system. Background technique [0002] PCI, the full name is Peripheral Component Interconnect, a peripheral component interconnection standard, which is a standard used to define a local bus. For servers and storage systems, the PCI bus occupies most of the resources and is one of the most important test points in manufacturing. The most important thing to do in the test is to ensure the integrity of the PCI bus in the operating system, so how to obtain all the PCI bus resources of the operating system is the key. [0003] The usual traversal method is to scan all possible buses in the operating system, as well as all possible devices under each bus and all possible functions under each device, so that a complete PCI resource traversal of the operating system needs to scan 256*32* 8 times. Although this traversal method can ensure that no PCI devices are missed, it has the problem of too m...

AI Technical Summary

Problems solved by technology

Although these two methods have the least number of traversals and do not waste time scanning for non-existing PCI devices, they have unstable factors.

When reading and writing PCI system files repeatedly, if a certain stress test level is reached, some data in the configuration space of some PCI devices cannot be read sometimes.

Moreover, the lspci tool not only has the function of traversal, but also has other functions that may not be used, so there is also a waste of resources

This is a bad choice for factory test mode where the test system size is critical

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