MACsec Intel® FPGA IP User Guide

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ID 736108
Date 10/21/2022
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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. MACsec Intel® FPGA IP Example Design 6. Functional Description 7. Configuration Registers for MACsec IP 8. 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. Crypto RX Interface 2.2.1.8. Crypto TX Interface 2.2.1.9. Management Interface 2.2.1.10. Decrypt Port Mux Management Interface 2.2.1.11. Decrypt Port Demux Management Interface 2.2.1.12. Encrypt Port Mux Management Interface 2.2.1.13. Encrypt Port Demux Management Interface 2.2.1.14. Crypto IP Management Bus
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 4.6. MACsec Software Rekeying
4.1. Installing and Licensing Intel® FPGA IP Cores x
4.1.1. Intel® FPGA IP Evaluation Mode
5. MACsec Intel® FPGA IP Example Design x
5.1. Port Configurations 5.2. Multi Interface Buffering Muxing/Demuxing 5.3. 2x25 GbE (Encryption + Decryption) 5.4. Packet Generator/Checker 5.5. Clocking
6. Functional Description x
6.1. AXI-ST Common/Controlled/Uncontrolled Ports 6.2. Packet Parser and Classifier 6.3. SA Lookup and Update 6.4. Encryption Framer/DeFramer 6.5. Decryption Framer/Deframer 6.6. Packet Aggregator/Disaggregator 6.7. Cryptographic AES 6.8. Error Handling 6.9. Packet Statistics
6.1. AXI-ST Common/Controlled/Uncontrolled Ports x
6.1.1. AXI-ST Single Packet Mode 6.1.2. AXI-ST Multi Packet Mode 6.1.3. User Interface Data Streaming 6.1.4. AXI-ST Ready Latency 6.1.5. Port and Secure Channel Mapping 6.1.6. Port and Crypto Channel Mapping 6.1.7. Minimum Packet Size 6.1.8. Byte Ordering 6.1.9. Controlled/Uncontrolled Port Muxing
6.1.3. User Interface Data Streaming x
6.1.3.1. Single Packet Mode Data Stream 6.1.3.2. Multi Packet Mode Data Stream
6.2. Packet Parser and Classifier x
6.2.1. Packet Parser 6.2.2. Packet Classifier
6.3. SA Lookup and Update x
6.3.1. Packet Actions 6.3.2. Packet Buffer 6.3.3. New Channel Assignment 6.3.4. Anti-Replay Protection
6.3.1. Packet Actions x
6.3.1.1. Packet Encrypt 6.3.1.2. Packet Decrypt 6.3.1.3. Packet Discard
6.3.1.3. Packet Discard x
6.3.1.3.1. PDU Validation
6.4. Encryption Framer/DeFramer x
6.4.1. Channel Allocation 6.4.2. Packet Framer 6.4.3. VLAN Tagging
6.4.2. Packet Framer x
6.4.2.1. Bypass Packet 6.4.2.2. Stream Interleaving
6.4.3. VLAN Tagging x
6.4.3.1. No VLAN Tag 6.4.3.2. VLAN Tag (Not in Clear) 6.4.3.3. VLAN Tag (Clear)
6.5. Decryption Framer/Deframer x
6.5.1. XPN Recovery 6.5.2. Replay Check Update 6.5.3. Packet Deframer
6.6. Packet Aggregator/Disaggregator x
6.6.1. Packet Aggregator 6.6.2. Packet Disaggregator
6.7. Cryptographic AES x
6.7.1. Register Address Ordering 6.7.2. Byte Order Swapping 6.7.3. Byte Ordering
6.8. Error Handling x
6.8.1. Packet Error Handling 6.8.2. Memory Blocks ECC Errors 6.8.3. Crypto Errors 6.8.4. System-Level Errors
1. Introduction
2. Interface Overview
3. Parameters
4. Designing with the IP Core
5. MACsec Intel® FPGA IP Example Design
6. Functional Description
7. Configuration Registers for MACsec IP
8. Document Revision History for the MACsec Intel FPGA IP User Guide

6.1.3.2. Multi Packet Mode Data Stream

The example below shows user interface data stream into the MACsec IP as two full packets in Multi Packet Mode. These packets originate from port/stream 0 (based on TID). The data payload of the packets is sent in consecutive cycles without interleaving. In cycle 2, the 2nd packet from port/stream 0 begins at the 5th segment, after an idle segment at the 4th segment following an end of packet from the 1st packet. The start and end of the 1st and 2nd packets can be derived through the TLAST, Tuser_last_segment<N> and TKEEP signals.
Table 32.  Multi Packet Mode with Two Full Packets
AXI-ST Cycle 0 Cycle 1 Cycle 2 Cycle 3 Cycle 4 Cycle 5
TID (TID[5:0]) 0 0 0 0 0 0
TVALID 1 1 1 1 1 1
TLAST 0 0 1 0 0 1
TKEEP All 1 All 1

1111_1111

1111_1111

1111_1111

0000_0000

1111_1111

1111_1111

1111_1111

1111_1111

 All 1 All 1

0000_0000

1111_1111

1111_1111

1111_1111

1111_1111

1111_1111

1111_1111

1111_1111
Tuser_last_segment<N> (N from 7 to 0) All 0 All 0 0000_1000 All 0 All 0 0100_0000
TDATA Data Data Data Data Data Data

The example below shows 4 packets interleaved on the user interface streaming data into the MACsec IP. These packets originate from port/stream 0, 2, 3 (based on TID) and interleaving happens every 64B word. The packet from port/stream 0 enters the MACsec IP in cycle 0 and 4, and packets from port/stream 2 enter the MACsec IP in cycle 1, 3, 6, while packets from port/stream 3 enter the MACsec IP in cycle 2 and 5.

The start and end of packet from each port/stream packet can be derived through the TLAST, Tuser_last_segment<N> and TKEEP signals. In Multi Packet Mode we have 2 packets in the same cycle (for example, cycle 3).
Table 33.  Multi Packet Mode with Four Packets Interleaved
AXI-ST Cycle 0 Cycle 1 Cycle 2 Cycle 3 Cycle 4 Cycle 5 Cycle 6
TID (TID[5:0]) 0 2 3 2 0 3 2
TVALID 1 1 1 1 1 1 1
TLAST 0 0 0 1 1 1 1
TKEEP All 1 All 1 All 1

1111_1111

1111_1111

1111_1111

0000_0000

1111_1111

1111_1111

1111_1111

1111_1111

 All 1 All 1 All 1
Tuser_last_segment<N> (N from 7 to 0) All 0 All 0 All 0 0000_1000 1000_0000 1000_0000 1000_0000
TDATA Data Data Data Data Data Data Data
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