25G Ethernet Arria® 10 FPGA IP User Guide

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ID 683639
Date 7/25/2024
Public
Document Table of Contents
Document Table of Contents x
1. About the 25G Ethernet Intel FPGA IP 2. Getting Started 3. 25G Ethernet Intel FPGA IP Parameters 4. Functional Description 5. Reset 6. Interfaces and Signal Descriptions 7. Control, Status, and Statistics Register Descriptions 8. Debugging the Link 9. 25G Ethernet Arria® 10 FPGA IP User Guide Archive 10. Document Revision History for the 25G Ethernet Arria® 10 FPGA IP User Guide
1. About the 25G Ethernet Intel FPGA IP x
1.1. Release Information 1.2. 25G Ethernet Intel FPGA IP Supported Features 1.3. 25G Ethernet Intel FPGA IP Core Device Family and Speed Grade Support 1.4. IP Core Verification 1.5. Performance and Resource Utilization
1.3. 25G Ethernet Intel FPGA IP Core Device Family and Speed Grade Support x
1.3.1. Device Family Support 1.3.2. 25G Ethernet Intel FPGA IP Core Device Speed Grade Support
1.4. IP Core Verification x
1.4.1. Simulation Environment 1.4.2. Compilation Checking 1.4.3. Hardware Testing
2. Getting Started x
2.1. Installing and Licensing Intel® FPGA IP Cores 2.2. Specifying the 25G Ethernet Intel FPGA IP Core Parameters and Options 2.3. Simulating the IP Core 2.4. Generated File Structure 2.5. Integrating Your IP Core in Your Design 2.6. Compiling the Full Design and Programming the FPGA
2.1. Installing and Licensing Intel® FPGA IP Cores x
2.1.1. Intel® FPGA IP Evaluation Mode
2.5. Integrating Your IP Core in Your Design x
2.5.1. Pin Assignments 2.5.2. Adding the Transceiver PLL 2.5.3. Handling Potential Jitter in Arria® 10 Devices 2.5.4. Adding the External Time-of-Day Module for Variations with 1588 PTP Feature 2.5.5. Placement Settings for the Core
4. Functional Description x
4.1. 25G Ethernet Intel FPGA IP Core Functional Description 4.2. User Interface to Ethernet Transmission
4.1. 25G Ethernet Intel FPGA IP Core Functional Description x
4.1.1. 25G Ethernet Intel FPGA IP Core TX MAC Datapath 4.1.2. 25 GbE TX PCS 4.1.3. 25G Ethernet Intel FPGA IP Core RX MAC Datapath 4.1.4. Link Fault Signaling Interface 4.1.5. 25 GbE RX PCS 4.1.6. Flow Control 4.1.7. 1588 Precision Time Protocol Interfaces
4.1.1. 25G Ethernet Intel FPGA IP Core TX MAC Datapath x
4.1.1.1. Frame Padding 4.1.1.2. Preamble Insertion 4.1.1.3. Inter-Packet Gap Generation and Insertion 4.1.1.4. Frame Check Sequence (CRC32) Insertion
4.1.2. 25 GbE TX PCS x
4.1.2.1. TX RSFEC
4.1.3. 25G Ethernet Intel FPGA IP Core RX MAC Datapath x
4.1.3.1. IP Core Preamble Processing 4.1.3.2. IP Core Malformed Packet Handling 4.1.3.3. Length/Type Field Processing 4.1.3.4. RX CRC Checking and Dynamic Forwarding
4.1.3.3. Length/Type Field Processing x
4.1.3.3.1. Length Checking
4.1.5. 25 GbE RX PCS x
4.1.5.1. RX RSFEC
4.1.6. Flow Control x
4.1.6.1. TX Pause/PFC Flow Control Frame Transmission Request 4.1.6.2. XON/XOFF Pause Frames
4.1.7. 1588 Precision Time Protocol Interfaces x
4.1.7.1. Implementing a 1588 System That Includes a 25G Ethernet Intel FPGA IP Core 4.1.7.2. PTP Receive Functionality 4.1.7.3. PTP Transmit Functionality 4.1.7.4. External Time-of-Day Module for 1588 PTP Variations 4.1.7.5. PTP Timestamp and TOD Formats
4.2. User Interface to Ethernet Transmission x
4.2.1. Order of Transmission 4.2.2. Bit Order For TX and RX Datapaths
6. Interfaces and Signal Descriptions x
6.1. TX MAC Interface to User Logic 6.2. RX MAC Interface to User Logic 6.3. Transceivers 6.4. Transceiver Reconfiguration Signals 6.5. Avalon® Memory-Mapped Management Interface 6.6. 1588 PTP Interface Signals 6.7. Miscellaneous Status and Debug Signals 6.8. Reset Signals
7. Control, Status, and Statistics Register Descriptions x
7.1. PHY Registers 7.2. TX MAC Registers 7.3. RX MAC Registers 7.4. Pause/PFC Flow Control Registers 7.5. Statistics Registers 7.6. 1588 PTP Registers 7.7. TX Reed-Solomon FEC Registers 7.8. RX Reed-Solomon FEC Registers
7.5. Statistics Registers x
7.5.1. TX Statistics Registers 7.5.2. RX Statistics Registers
8. Debugging the Link x
8.1. Error Insertion Test and Debugging
1. About the 25G Ethernet Intel FPGA IP
2. Getting Started
3. 25G Ethernet Intel FPGA IP Parameters
4. Functional Description
5. Reset
6. Interfaces and Signal Descriptions
7. Control, Status, and Statistics Register Descriptions
8. Debugging the Link
9. 25G Ethernet Arria® 10 FPGA IP User Guide Archive
10. Document Revision History for the 25G Ethernet Arria® 10 FPGA IP User Guide

1.2. 25G Ethernet Intel FPGA IP Supported Features

The 25G Ethernet Intel FPGA IP is designed to the 25G & 50G Ethernet Specification, Draft 1.6 from the 25 Gigabit Ethernet Consortium and designed to the IEEE 802.3by 25Gb Ethernet specification, as well as the IEEE 802.3ba-2012 High Speed Ethernet Standard available on the IEEE website (www.ieee.org). The MAC provides RX cut-through frame processing to optimize latency. The IP supports the following features:

  • PHY features:
    • Soft PCS logic that interfaces seamlessly to Arria® 10 FPGA 25.78125 gigabits per second (Gbps) serial transceivers.
    • IEEE 802.3-2018 Ethernet Standard Clause 108 optional soft Reed-Solomon forward error correction (RS-FEC).
  • Frame structure control features:
    • Support for jumbo packets, defined as packets greater than 1500 bytes.
    • Receive (RX) CRC removal and pass-through control.
    • Transmit (TX) CRC generation and insertion.
    • RX and TX preamble pass-through option for applications that require proprietary user management information transfer.
    • TX automatic frame padding to meet the 64-byte minimum Ethernet frame length.
  • Frame monitoring and statistics:
    • RX CRC checking and error reporting.
    • RX malformed packet checking per IEEE specification.
    • Optional statistics counters.
    • Optional fault signaling detects and reports local fault and generates remote fault, with IEEE 802.3ba-2012 Ethernet Standard Clause 46 support.
    • Unidirectional transport as defined in Clause 66 of the IEEE 802.3-2012 Ethernet Standard.
  • Flow control:
    • Standard IEEE 802.3 Clause 31 and Priority-Based IEEE 802.1Qbb flow control.
  • Precision Time Protocol support:
    • Optional support for the IEEE Standard 1588-2008 Precision Clock Synchronization Protocol (1588 PTP). This feature supports PHY operating speed with a constant timestamp accuracy of ± 3 ns and a dynamic timestamp accuracy of ± 1 ns.
  • Debug and testability features:
    • Programmable serial PMA local loopback (TX to RX) at the serial transceiver for self-diagnostic testing.
    • TX error insertion capability.
    • Optional access to Native PHY Debug Master Endpoint (NPDME) for serial link debugging or monitoring PHY signal integrity.
  • User system interfaces:
    • Avalon® memory-mapped management interface to access the IP control and status registers.
    • Avalon® streaming data path interface connects to client logic.
    • Configurable ready latency of 0 or 3 clock cycles for Avalon® streaming TX interface.
    • Hardware and software reset control.

For a detailed specification of the Ethernet protocol refer to the IEEE 802.3 Ethernet Standard.

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