Bandwidth allocation method and apparatus for PCIe external plug-in card, and device and storage medium

A method for allocating a bandwidth for a Peripheral Component Interconnect Express (PCIe) external plug-in card, comprising:

• configuring a Platform Controller Hub (PCH) of a system to connect with a connector, an adapter card and a PCIe external plug-in card successively through an Inter-Integrated Circuit (I2C) bus;
• in response to that the system is powered on, enabling the PCH to obtain a preset configuration information stored in the PCIe external plug-in card through the I2C bus;
• and
• enabling the PCH to determine a target bandwidth according to the preset configuration information, and allocate a bandwidth for the PCIe external plug-in card based on the target bandwidth,
• wherein the configuring the PCH to connect with the connector, the adapter card and the PCIe external plug-in card successively through the I2C bus, comprises:
• configuring two input ends of an arbitration chip to respectively connect with the PCH and the baseboard management controller through the I2C bus;
• configuring an output end of the arbitration chip to connect with the connector, the adapter card and the PCIe external plug-in card successively through the I2C bus;
• in response to that the system is powered on, selecting, by the arbitration chip, the PCH as inputting after strobing of the arbitration chip is powered on;
• and
• in response to that the PCH completes allocating the bandwidth, selecting, by the arbitration chip, the baseboard management controller as the inputting, and
• wherein the enabling the PCH to obtain the preset configuration information stored in the PCIe external plug-in card through the I2C bus, comprises:
• in response to that the arbitration chip selects the PCH as the inputting after the strobing of the arbitration chip is powered on, sending, by the PCH, a second read request to the PCIe external plug-in card through the I2C bus;
• and
• in response to the second read request, returning, by the PCIe external plug-in card, the preset configuration information to the PCH through the I2C bus.

A computer device for allocating a bandwidth for a PCIe external plug-in card, comprising:

• a memory and one or more processors, wherein the memory stores computer-readable instructions, and in response to that the computer-readable instructions are executed by the one or more processors, the computer-readable instructions make the one or more processors to
• configure a PCH of a system to connect with a connector, an adapter card and a PCIe external plug-in card successively through an I2C bus;
• in response to that the system is powered on, enable the PCH to obtain preset configuration information stored in the PCIe external plug-in card through the I2C bus;
• and
• enable the PCH to determine a target bandwidth according to the preset configuration information, and allocate a bandwidth for the PCIe external plug-in card based on the target bandwidth,
• wherein the configuring the PCH to connect with the connector, the adapter card and the PCIe external plug-in card successively through the I2C bus, comprises:
• configuring the PCH to connect with a baseboard management controller through the I2C bus;
• and
• configuring the baseboard management controller to connect with the connector, the adapter card and the PCIe external plug-in card successively through the I2C bus, and
• wherein the enabling the PCH to obtain the preset configuration information stored in the PCIe external plug-in card through the I2C bus, comprises:
• in response to that the system is powered on, sending, by the baseboard management controller, a first read request to the PCIe external plug-in card through the I2C bus;
• in response to the first read request, returning, by the PCIe external plug-in card, the preset configuration information to the baseboard management controller through the I2C bus;
• and
• receiving the preset configuration information and sending the preset configuration information to the PCH, by the baseboard management controller.