MACsec Intel® FPGA IP User Guide

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ID 736108
Date 3/31/2024
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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

5.8.4. System-Level Errors

Table 55.  System-Level Errors
Scenario Mitigation
Ethernet Rx received packets reported errors (Errors signal in EOP, FCS/length/Undersize/Oversize & etc)

Errors propagated together with Packet using TUSER metadata from Ethernet > Multi Interface Buffering Mux > MACsec IP > Multi Interface Buffering Demux. Packet drop in Multi Interface Buffering Demux after reassembly the full packet.

Error packets (forwarded error or ICV error) always asserts tuser.tlast_uerr_fatal at the end of packet when leaving MACSEC IP. User can decode the error signal to drop the packet in case Multi Interface Buffering Demux is not used.

Multi Interface Buffering Mux FIFO full and packet truncated Multi Interface Buffering Mux appends TLAST to the truncated packet and error inserted to the packet metadata. Packet drop at Multi Interface Buffering Demux following the above data flow.
Invalid L2 packet fields due to adversary attacks Crypto QHIP shall detect ICV comparison mismatch and MACSEC IP drops the packet.
MACsec Packets size > MAX_TX_PCKT_BYTES setting on Tx transmit lane Overload the Error Ethernet signal (tuser_client.oversize) and error propagated together with Packet to Multi Interface Buffering Demux. Packet drop in Multi Interface Buffering Demux after reassembly the full packet.
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