PCIe NOP DLLP Event Signaling for Trigger-Based Debugging
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Solution Overview
Problem
Existing PCIe-based storage devices lack effective mechanisms to detect and manage trigger points of events during data communication, which hinders efficient debugging and maintenance.
Innovation Solution
A PCIe interface device that generates and transmits No Operation (NOP) data link layer packets (DLLPs) containing event information, allowing external devices to perform dump operations and monitor communication environments for accurate debugging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing PCIe-based storage devices use conventional data communication without event trigger detection mechanisms, then the device structure remains simple, but effective debugging and maintenance become difficult
Solution Approach 1:
The patent introduces an intermediary mechanism using NOP DLLP packets as mediators between the PCIe device and external debugging systems. These packets carry event information and trigger signals without disrupting normal data communication, enabling debugging functionality while maintaining device operational simplicity
Solution Approach 2:
The patent implements feedback mechanisms where the device monitors its own operational state and sends feedback signals through NOP DLLP packets to external devices. This enables real-time event detection and trigger-based debugging, improving ease of operation while adding controlled complexity through standardized feedback protocols
2Measurement precision
If PCIe devices transmit data continuously without event-triggered mechanisms, then data communication is simple, but precise detection of event trigger points becomes difficult
Solution Approach 1:
The patent segments the data communication mechanism into two independent parts: normal data transmission and event trigger signaling. By separating these functions and using NOP DLLP packets specifically for event triggers, the system achieves precise event detection without complicating the overall communication mechanism
Solution Approach 2:
The patent uses distinct packet types (NOP DLLP with specific event information fields) as visual identifiers analogous to color changes. This allows external devices to easily distinguish and detect event trigger points in the data stream, improving measurement precision while maintaining clear communication protocols
3Loss of information
If no dump operation mechanism is implemented, then the system remains simple, but storing information about data and packets during specific time periods becomes impossible
Solution Approach 1:
The patent implements preliminary action by having external devices ready to perform dump operations upon receiving trigger signals. The system pre-configures the capability to store information during specific time periods without adding complex real-time decision logic, thus retaining information while managing system complexity through pre-established protocols
Data Source
AI summary
Provided herein is a PCIe interface device. The PCIe interface device may include a NOP DLLP generator configured to generate a No Operation (NOP) data link layer packet (DLLP) including event information representing an event in response to the occurrence of the event and a transmitter configured to transmit the NOP DLLP to an external device through a link including a plurality of lanes.