Automatic PCIe Bus Configuration via Peripheral Lane Requests
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Solution Overview
Problem
Existing PCIe bus configurations require manual changes to the motherboard and operating system settings when peripherals are added or replaced, which is inefficient and prone to errors.
Innovation Solution
A system and method for automatic configuration of a PCIe bus using a bus controller that receives lane requests from peripheral devices, with peripheral-monitoring logic circuits and main logic circuits communicating over a serial bus to configure the bus accordingly, allowing for bifurcation without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual configuration of PCIe bus settings is used, then configuration accuracy is maintained, but operation efficiency deteriorates due to required manual changes when peripherals are added or replaced
Solution Approach 1:
The system enables self-service configuration where the PCIe bus automatically configures itself based on peripheral device requests. The bus controller receives lane requests from peripheral devices and autonomously adjusts bus parameters without requiring manual intervention, allowing the system to reconfigure itself when devices are added or removed.
Solution Approach 2:
The implementation incorporates feedback mechanisms where peripheral devices communicate their lane requirements to the bus controller, which then adjusts the bus configuration accordingly. This closed-loop feedback system ensures the bus configuration continuously adapts to current peripheral needs without manual input.
2Productivity
If automatic configuration is implemented, then operation efficiency improves, but system complexity increases due to additional logic circuits and communication protocols
Solution Approach 1:
The bus controller is designed with multi-functionality, handling both traditional PCIe bus management and automatic configuration tasks. The controller integrates multiple functions including receiving peripheral requests, interpreting lane requirements, and executing reconfiguration, thereby managing complexity through functional consolidation rather than proliferation of separate components.
3Adaptability or versatility
If PCIe bus supports bifurcation, then adaptability improves for different peripheral configurations, but configuration complexity increases requiring precise lane allocation
Solution Approach 1:
The PCIe bus configuration is made dynamic through automatic adaptation to peripheral device needs. The system transitions from static manual configuration to dynamic self-adjusting configuration where bus parameters such as lane allocation are continuously optimized based on real-time peripheral requests and system state.
Data Source
AI summary
A computer system includes a system bus having multiple lanes, one or more peripheral devices, and a bus controller. The peripheral devices are coupled to the system bus. The bus controller is configured to receive, from one or more of the peripheral devices, respective indications of numbers of the lanes requested by the peripheral devices, and to configure the system bus in response to the indications.