Platform Interface Layer for FPGA Accelerator Protocol Abstraction
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Solution Overview
Problem
In data centers, programming field-programmable gate arrays (FPGAs) to communicate effectively with processors is burdensome due to the need to manage multiple interfaces and protocols, particularly when workload demands change, requiring frequent updates to acceleration function units (AFUs) to adapt to new demands and standards.
Innovation Solution
A standardized platform interface layer (PIL) is introduced, which operates independently of the AFU and is programmed onto an FPGA, using the Core Cache Interface Protocol (CCI-P) to simplify communication between AFUs and processors, allowing for easy migration across different FPGA platforms and reducing the burden on programmers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple interfaces and protocols are used for FPGA communication, then communication compatibility across different platforms is improved, but programming complexity and burden increase
Solution Approach 1:
The patent introduces a platform interface layer (PIL) as an intermediary component between the acceleration function unit (AFU) and the processor. This PIL handles protocol conversion and interface management, allowing the AFU to communicate with different processor platforms through a standardized interface. The PIL translates between the simplified AFU interface and various platform-specific protocols, thereby maintaining communication compatibility while shielding the AFU programmer from protocol complexity.
Solution Approach 2:
The communication system is segmented into distinct functional layers: the AFU layer that focuses purely on acceleration functions, the PIL layer that handles interface and protocol management, and the platform-specific implementation layer. This segmentation allows each layer to be developed and maintained independently, reducing the programming burden on AFU developers while maintaining multi-platform compatibility.
2Adaptability or versatility
If AFUs are updated frequently to adapt to new demands, then adaptability to workload changes is improved, but development and deployment time increase
Solution Approach 1:
The patent creates a universal PIL that can handle multiple communication protocols and interface types. This universal interface layer allows the same AFU to be deployed across different processor platforms and workload requirements without modification. When workload demands change, only the PIL configuration needs to be updated, not the entire AFU, significantly reducing development and deployment time while maintaining adaptability.
Solution Approach 2:
The PIL is pre-configured with knowledge of multiple platform interfaces and communication protocols. This preliminary preparation allows for rapid adaptation to new workload demands, as the infrastructure for handling different protocols is already in place and can be activated through configuration rather than requiring new development work.
3Measurement precision
If platform-specific programming is required, then communication precision is improved, but portability across different FPGAs decreases
Solution Approach 1:
The PIL serves as a mediator that preserves communication precision by implementing platform-specific protocol handling while presenting a unified interface to the AFU. The PIL ensures that precise, platform-specific communication requirements are met through its implementation layer, while the AFU programmer works with a simplified, platform-agnostic interface, thereby maintaining both precision and portability.
Data Source
AI summary
There is disclosed in one example an accelerator apparatus, including: a programmable region capable of being programmed to provide an accelerator function unit (AFU); and a platform interface layer (PIL) to communicatively couple to the AFU via an intra-accelerator protocol, and to provide multiplexed communication with a processor via a plurality of platform interconnect interfaces, wherein the PIL is to provide abstracted communication services for the AFU to communicate with the processor.