How to start pcie device scan
A technology of equipment and main equipment, applied in the field of computer communication, can solve the problem of inability to scan and identify PCIE equipment
Active Publication Date: 2022-04-15
FIBOCOM WIRELESS
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[0004] Based on this, it is necessary to provide a method for starting PCIE device scanning for the problem that the PCIE device cannot be scanned and identified during the operation of the Linux operating system.
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[0028] In order to facilitate the understanding of the present application, and to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth to facilitate a full understanding of the application, and preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the application more thorough and comprehensive. The present application can be implemented in many other ways that are different from those described here, and those skilled in the art can make similar improvements wi...
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The present application relates to a method for initiating scanning of PCIE devices, including: when a Linux operating system is started, a main device performs an initial scan on a PCIE device; acquiring identity information of the PCIE device; loading a power management driver corresponding to the identity information, and the power management driver uses To provide the interface function of the control method of supplying power to the PCIE equipment to the Linux operating system; When the Linux operating system needs to rescan and identify the target PCIE device, obtain the identity information of the target PCIE device; Call the interface function to make the power management drive Find the IO node of the BIOS program; use the IO node to make the BIOS program execute a corresponding control strategy on the target PCIE device, where the control strategy at least includes enumeration scanning. By calling the interface function provided by the power management driver, the corresponding control strategy including enumeration scanning is implemented for the target PCIE device, which overcomes the problem that the PCIE device cannot be scanned and identified during the running of the Linux operating system.
Description
technical field [0001] The present application relates to the technical field of computer communication, in particular to a method for starting PCIE device scanning. Background technique [0002] Under the Linux operating system, high-speed peripheral component interface (Peripheral Component Interface Express, PCIE) devices are initialized and scanned for identification, which only occurs after the Linux operating system is normally powered on. That is, after the Linux operating system is normally powered on, only one initial scan and enumeration of the PCIE bus tree is performed. If the PCIE device needs to be re-scanned and enumerated during the running of the Linux operating system, it is necessary to restart the system to reload the Linux operating system. [0003] During the operation of the Linux operating system, if the PCIE device is powered off and then powered on again, the Linux operating system cannot re-enumerate and scan the PCIE device, and thus cannot be use...
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IPC IPC(8): G06F9/4401
CPCG06F9/4411
Inventor 赵飞
Owner FIBOCOM WIRELESS