MACsec Intel® FPGA IP User Guide

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ID 736108
Date 3/31/2024
Public
Document Table of Contents
Document Table of Contents x
1. Introduction 2. Interface Overview 3. Parameters 4. Designing with the IP Core 5. Functional Description 6. Configuration Registers for MACsec IP 7. MACsec Intel® FPGA IP Example Design 8. MACsec Intel FPGA IP User Guide Archives 9. Document Revision History for the MACsec Intel FPGA IP User Guide
1. Introduction x
1.1. Terminology 1.2. IP Core Overview 1.3. Release Information 1.4. Device Family Support 1.5. Device Speed Grade Support and Theoretical Throughput 1.6. Resource Utilization
1.2. IP Core Overview x
1.2.1. IP Description 1.2.2. IP Core Applications
1.2.2. IP Core Applications x
1.2.2.1. SmartNIC 1.2.2.2. Ethernet Bridge + Inline MACsec
2. Interface Overview x
2.1. Block Diagram 2.2. Interfaces 2.3. Clocking Domains
2.2. Interfaces x
2.2.1. IP Interface Signals 2.2.2. IP Interface Signal Timing Diagram/Waveforms 2.2.3. Clocks, Resets, and Interrupts
2.2.1. IP Interface Signals x
2.2.1.1. Common Port Mux Interface 2.2.1.2. Common Port Demux Interface 2.2.1.3. Controlled Port Mux Interface 2.2.1.4. Controlled Port Demux Interface 2.2.1.5. Uncontrolled Port RX Interface 2.2.1.6. Uncontrolled Port TX Interface 2.2.1.7. Management Interface 2.2.1.8. Decrypt Port Mux Management Interface 2.2.1.9. Decrypt Port Demux Management Interface 2.2.1.10. Encrypt Port Mux Management Interface 2.2.1.11. Encrypt Port Demux Management Interface 2.2.1.12. Crypto IP Management Bus 2.2.1.13. Miscellaneous Control Signals
2.2.2. IP Interface Signal Timing Diagram/Waveforms x
2.2.2.1. Common Port Mux Interface Waveform 2.2.2.2. Common Port Demux Interface Waveform 2.2.2.3. Controlled Port Mux Interface Waveform 2.2.2.4. Controlled Port Demux Interface Waveform 2.2.2.5. Uncontrolled Port RX Interface Waveform 2.2.2.6. Uncontrolled Port TX Interface Waveform 2.2.2.7. Crypto RX Waveform 2.2.2.8. Crypto TX Waveform 2.2.2.9. MACsec Management Interface (Read) 2.2.2.10. MACsec Management Interface (Write)
3. Parameters x
3.1. MACsec Intel FPGA IP Parameter Settings
4. Designing with the IP Core x
4.1. Installing and Licensing Intel® FPGA IP Cores 4.2. Specifying the IP Core Parameters and Options 4.3. Generated File Structure 4.4. Reset Transactions 4.5. MACsec Software Initialization Sequence
4.1. Installing and Licensing Intel® FPGA IP Cores x
4.1.1. Intel® FPGA IP Evaluation Mode
5. Functional Description x
5.1. AXI-ST Common/Controlled/Uncontrolled Ports 5.2. Packet Parser and Classifier 5.3. SA Lookup and Update 5.4. Encryption Framer/DeFramer 5.5. Decryption Framer/Deframer 5.6. Packet Aggregator/Disaggregator 5.7. Cryptographic AES 5.8. Error Handling 5.9. Packet Statistics
5.1. AXI-ST Common/Controlled/Uncontrolled Ports x
5.1.1. AXI-ST Single Packet Mode 5.1.2. AXI-ST Multi Packet Mode 5.1.3. User Interface Data Streaming 5.1.4. AXI-ST Ready Latency 5.1.5. Port and Secure Channel Mapping 5.1.6. Port and Crypto Channel Mapping 5.1.7. Minimum Packet Size 5.1.8. Byte Ordering 5.1.9. Controlled/Uncontrolled Port Muxing
5.1.3. User Interface Data Streaming x
5.1.3.1. Single Packet Mode Data Stream 5.1.3.2. Multi Packet Mode Data Stream
5.2. Packet Parser and Classifier x
5.2.1. Packet Parser 5.2.2. Packet Classifier
5.3. SA Lookup and Update x
5.3.1. Packet Actions 5.3.2. Packet Buffer 5.3.3. New Channel Assignment 5.3.4. Anti-Replay Protection
5.3.1. Packet Actions x
5.3.1.1. Packet Encrypt 5.3.1.2. Packet Decrypt 5.3.1.3. Packet Discard 5.3.1.4. PDU Validation
5.4. Encryption Framer/DeFramer x
5.4.1. Channel Allocation 5.4.2. Packet Framer 5.4.3. VLAN Tagging
5.4.2. Packet Framer x
5.4.2.1. Bypass Packet 5.4.2.2. Stream Interleaving
5.4.3. VLAN Tagging x
5.4.3.1. No VLAN Tag 5.4.3.2. VLAN Tag (Not in Clear) 5.4.3.3. VLAN Tag (Clear)
5.5. Decryption Framer/Deframer x
5.5.1. XPN Recovery 5.5.2. Replay Check Update 5.5.3. Packet Deframer
5.6. Packet Aggregator/Disaggregator x
5.6.1. Packet Aggregator 5.6.2. Packet Disaggregator
5.7. Cryptographic AES x
5.7.1. Register Address Ordering 5.7.2. Byte Order Swapping 5.7.3. Byte Ordering
5.8. Error Handling x
5.8.1. Packet Error Handling 5.8.2. Memory Blocks ECC Errors 5.8.3. Crypto Errors 5.8.4. System-Level Errors
7. MACsec Intel® FPGA IP Example Design x
7.1. Simulation Requirements 7.2. Steps to Run Simulation 7.3. Port Configurations 7.4. Multi Interface Buffering Muxing/Demuxing 7.5. 4x25 GbE (Encryption + Decryption) 7.6. Packet Generator/Checker 7.7. Clocking
1. Introduction
2. Interface Overview
3. Parameters
4. Designing with the IP Core
5. Functional Description
6. Configuration Registers for MACsec IP
7. MACsec Intel® FPGA IP Example Design
8. MACsec Intel FPGA IP User Guide Archives
9. Document Revision History for the MACsec Intel FPGA IP User Guide

7.3. Port Configurations

The MACsec ED user interface supports a maximum of 4 AXI-ST input and output ports. The number of ports is configured during IP generation time through Quartus GUI as shown in Available MACsec Design Example Variant. The bandwidth supported by the MACsec IP is 200Gbps and therefore the aggregated bandwidth of all ports should not exceed 200Gbps. In the scenario where the desired bandwidth exceeds the port bandwidth, backpressure occurs to avoid a buffer overflow.

The number of input ports always match the number of output ports. Traffic entering the MACsec IP input port leaves the IP output port with the same index. For example, traffic entering input port 0 leaves at output port 0.

The AXI-ST TID is used to indicate the Port ID and this ID is tagged along with the packet flowing through the MACsec lane to identify the destination output Controlled port or Common port. The AXI-ST TID value is fixed in a Multi Interface Buffering Mux/Demux based on the MAX TX TID parameter value. The MUX/DEMUX is always in store-forward mode while it is being assigned. For example, in a 2 Tx port 2 Rx port configuration, TID 0 and 1 are assigned internally to Tx port 0 and port 1, while TID 2 and 3 are assigned internally to Rx port 0 and port 1. It is not necessary to assign any value to the AXI-ST TID signal when sending the request into the Multi Interface Buffering Mux/Demux. Refer to Port and Crypto Channel Mapping for some examples of how TID is assigned based on the MAX TX TID parameter.

For F-tile Ethernet Hard IP, the default value of maximum packet size is set to 1518. In order to match the maximum packet size between Ethernet and MACsec, MAX_TX_SIZE_CONFIG and MAX_RX_SIZE_CONFIG CSRs in the Ethernet Hard IP are required to be configured to 9600.

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