F-Tile Ethernet Intel® FPGA Hard IP User Guide

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ID 683023
Date 10/04/2021
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Document Table of Contents
Document Table of Contents x
1. Overview 2. Getting Started 3. F-Tile Ethernet Intel® FPGA Hard IP Parameters 4. Functional Description 5. Clocks 6. Resets 7. Interface Overview 8. Configuration Registers 9. Supported Modules and IPs 10. Supported Tools 11. F-Tile Ethernet Intel® FPGA Hard IP User Guide Archives 12. Document Revision History
1. Overview x
1.1. Ethernet System in F-Tile Overview 1.2. F-Tile Ethernet Intel® FPGA Hard IP Overview
1.2. F-Tile Ethernet Intel® FPGA Hard IP Overview x
1.2.1. Device Family Support 1.2.2. Resource Utilization 1.2.3. Release Information
2. Getting Started x
2.1. Installing and Licensing F-Tile Ethernet Intel® FPGA Hard IP Cores 2.2. Specifying the IP Core Parameters and Options 2.3. Reference and System PLL Clock for your IP Design 2.4. Generated File Structure 2.5. Generating Tile Files 2.6. IP Core Testbenches
4. Functional Description x
4.1. Datapath Description 4.2. F-Tile Ethernet Intel® FPGA Hard IP MAC 4.3. PCS, OTN, and FlexE Modes 4.4. Precision Time Protocol 4.5. Auto-Negotiation and Link Training
4.2. F-Tile Ethernet Intel® FPGA Hard IP MAC x
4.2.1. MAC TX Datapath 4.2.2. MAC RX Datapath 4.2.3. Congestion and Flow Control Using PAUSE or Priority Flow Control (PFC) 4.2.4. Link Fault Signaling 4.2.5. Order of Ethernet Transmission
4.2.1. MAC TX Datapath x
4.2.1.1. TX Preamble, Start, and SFD Insertion 4.2.1.2. Source Address Insertion 4.2.1.3. Length/Type Field Processing 4.2.1.4. Frame Padding 4.2.1.5. Frame Check Sequence (CRC-32) Insertion 4.2.1.6. Inter-Packet Gap Generation and Insertion
4.2.2. MAC RX Datapath x
4.2.2.1. RX Preamble Processing 4.2.2.2. RX Strict SFD Checking 4.2.2.3. RX FCS Checking 4.2.2.4. RX Malformed Packet Handling 4.2.2.5. Removing PAD Bytes and FCS Bytes from RX Frames 4.2.2.6. RX Undersized Frames, Oversized Frames, and Frames with Length Errors 4.2.2.7. Inter-Packet Gap
4.2.3. Congestion and Flow Control Using PAUSE or Priority Flow Control (PFC) x
4.2.3.1. Conditions Triggering XOFF Frame Transmission 4.2.3.2. Conditions Triggering XON Frame Transmission 4.2.3.3. Pause Control and Generation Interface 4.2.3.4. Pause Control Frame Filtering
4.3. PCS, OTN, and FlexE Modes x
4.3.1. PCS Mode 4.3.2. OTN Mode 4.3.3. FlexE Mode
4.4. Precision Time Protocol x
4.4.1. Features 4.4.2. PTP Timestamp Accuracy 4.4.3. PTP Client Flow 4.4.4. RX Virtual Lane Offset Calculation for No FEC Variants 4.4.5. Virtual Lane Order and Offset Values 4.4.6. UI Adjustment 4.4.7. Reference Time Interval 4.4.8. Minimum and Maximum Reference Time (TAM) Interval for UI Measurement (Hardware) 4.4.9. UI Value and PMA Delay 4.4.10. Routing Delay Adjustment for Advanced Timestamp Accuracy Mode
4.4.3. PTP Client Flow x
4.4.3.1. PTP TX Client Flow 4.4.3.2. PTP RX Client Flow
4.4.6. UI Adjustment x
4.4.6.1. TX UI Adjustment 4.4.6.2. RX UI Adjustment
5. Clocks x
5.1. Clock Connections in Single Instance Operation 5.2. Clock Connections in Multiple Instance Operation 5.3. Clock Connections in MAC Asynchronous FIFO Operation 5.4. Clock Connections in PTP-Based Synchronous and Asynchronous Operation 5.5. Clock Connections in Synchronous Ethernet Operation 5.6. Custom Cadence
6. Resets x
6.1. Reset Signals 6.2. Reset Sequence
7. Interface Overview x
7.1. Status Interface 7.2. TX MAC Avalon ST Client Interface 7.3. RX MAC Avalon ST Aligned Client Interface 7.4. TX MAC Segmented Client Interface 7.5. RX MAC Segmented Client Interface 7.6. MAC Flow Control Interface 7.7. PCS Mode TX Interface 7.8. PCS Mode RX Interface 7.9. FlexE and OTN Mode TX Interface 7.10. FlexE and OTN Mode RX Interface 7.11. Custom Rate Interface 7.12. Reconfiguration Interfaces 7.13. Precision Time Protocol Interface
7.2. TX MAC Avalon ST Client Interface x
7.2.1. TX MAC Avalon ST Client Interface with Disabled Preamble Passthrough 7.2.2. TX MAC Avalon ST Client Interface with Enabled Preamble Passthrough 7.2.3. Using MAC Avalon ST skip_crc Signal to Control Source Address, PAD, and CRC Insertion 7.2.4. Using MAC Avalon ST i_tx_error Signal to Mark Packets Invalid
7.3. RX MAC Avalon ST Aligned Client Interface x
7.3.1. RX MAC Avalon ST Client Interface with Disabled Preamble Passthrough 7.3.2. RX MAC Avalon ST Client Interface with Enabled Passthrough and RX CRC Forwarding 7.3.3. RX MAC Adapter Limitations 7.3.4. RX MAC Avalon ST Client Interface Status
7.4. TX MAC Segmented Client Interface x
7.4.1. TX MAC Segmented Client Interface with Disabled Preamble Passthrough 7.4.2. TX MAC Segmented Client Interface with Enabled Preamble Passthrough 7.4.3. Using MAC Segmented skip_crc Signal to Control Source Address, PAD, and CRC Insertion 7.4.4. Using MAC Segmented i_tx_mac_error to Mark Packets Invalid
7.5. RX MAC Segmented Client Interface x
7.5.1. RX MAC Segmented Client Interface with Disabled Preamble Passthrough 7.5.2. RX MAC Segmented Client Interface with Enabled Passthrough and RX CRC Forwarding 7.5.3. RX MAC Segmented Client Interface Status and Errors
7.12. Reconfiguration Interfaces x
7.12.1. Ethernet Reconfiguration Interfaces 7.12.2. Transceiver Reconfiguration Interfaces
7.13. Precision Time Protocol Interface x
7.13.1. Time-of-Day Interface 7.13.2. TX 2-Step Timestamp Interface 7.13.3. TX 1-Step Timestamp Interface 7.13.4. RX Timestamp Interface 7.13.5. PTP Status Interface 7.13.6. PTP Tile Interface
7.13.3. TX 1-Step Timestamp Interface x
7.13.3.1. PTP Field Offset for 1-Step Operation
8. Configuration Registers x
8.1. Ethernet Avalon® Memory-Mapped Interface Address Space 8.2. Transceiver Avalon® Memory-Mapped Interface Address Space
8.1. Ethernet Avalon® Memory-Mapped Interface Address Space x
8.1.1. Ethernet Hard IP Core CSRs 8.1.2. FEC and Transceiver Control and Status Registers
9. Supported Modules and IPs x
9.1. F-Tile Auto-Negotiation and Link Training For Ethernet Intel® FPGA IP 9.2. PTP Tile Adapter
9.1. F-Tile Auto-Negotiation and Link Training For Ethernet Intel® FPGA IP x
9.1.1. Overview 9.1.2. Release Information 9.1.3. Functional Description 9.1.4. Parameters 9.1.5. Clocks and Resets 9.1.6. Registers
9.2. PTP Tile Adapter x
9.2.1. Overview 9.2.2. Clocks, Reset, and Interface Ports 9.2.3. PTP Asymmetry Delay Reconfiguration Interface 9.2.4. PTP Peer-to-Peer MeanPathDelay Reconfiguration Interface
10. Supported Tools x
10.1. F-Tile Channel Placement Tool 10.2. Ethernet Toolkit Overview
10.2. Ethernet Toolkit Overview x
10.2.1. Features
1. Overview
2. Getting Started
3. F-Tile Ethernet Intel® FPGA Hard IP Parameters
4. Functional Description
5. Clocks
6. Resets
7. Interface Overview
8. Configuration Registers
9. Supported Modules and IPs
10. Supported Tools
11. F-Tile Ethernet Intel® FPGA Hard IP User Guide Archives
12. Document Revision History

7.12.1. Ethernet Reconfiguration Interfaces

You access Ethernet control and status registers of the F-Tile Ethernet Intel® FPGA Hard IP during normal operation using an Avalon® memory-mapped interface. The interface responds regardless of the link status. It also responds when the IP core is in a reset state driven by any reset signal or soft reset other than the i_reconfig_reset signal.
Note: The Avalon® memory-mapped interfaces are word-addressed. The address always aligns to 32-bit words. All register access described in this user guide is byte-based access. You need to convert each word address to a byte address by shifting right by two (dividing by 4). To access individual bytes, use the byte enable signals.
Table 52.  Ethernet Reconfiguration InterfaceThe signals in this interface are clocked by the i_reconfig_clk clock and reset by the i_reconfig_reset signal. This clock and reset are used for all the reconfiguration interfaces in the IP core.
Port Name Width Description

i_reconfig_eth_addr[13:0]

14 bits

Address bus for Ethernet control and status registers.

i_reconfig_eth_read

1 bit

Read request signal for Ethernet control and status registers.

i_reconfig_eth_write

1 bit

Write request signal for Ethernet control and status registers.

i_reconfig_eth_byteenable[3:0]

4 bits

Byte enable for Ethernet read and write request signals.

o_reconfig_eth_readdata[31:0]

32 bits

Read data from reads to Ethernet control and status registers.

o_reconfig_eth_readdata_valid

1 bit

Read data from Ethernet control and status registers is valid.

i_reconfig_eth_writedata[31:0]

32 bits

Write data for Ethernet control and status registers.

o_reconfig_eth_waitrequest

1 bit

Avalon® memory-mapped interface stalling signal for operations on Ethernet control and status registers.

Figure 47. Performing a Avalon® Memory-Mapped Interface Write on the Ethernet Reconfiguration Interface
The figure above shows how to write data using the Ethernet reconfiguration Avalon® memory-mapped interface.
  • When write begins while o_reconfig_eth_waitrequest is high, you must hold the write request (i_reconfig_eth_write) until o_reconfig_eth_waitrequest deasserts.

    A: When o_reconfig_eth_waitrequest deasserts, also deassert write on the next cycle.

  • When write begins while o_reconfig_eth_waitrequest is low:
    • B: The o_reconfig_eth_waitrequest signal asserts on the same clock cycle.
    • The write request holds until o_reconfig_eth_waitrequest deasserts.
    • C: On the next clock cycle after o_reconfig_eth_waitrequest deasserts, the write request (i_reconfig_eth_write)deasserts.
  • Write request can take a variable amount of time to complete.
  • You cannot perform read and write requests at the same time.
  • When multiple configuration bits are at the same address, a you need to perform a Read-Modify-Write operation to change the desired bits without changing the remaining configurations at the same location.
Figure 48. Performing a Avalon® Memory-Mapped Interface Read on the Ethernet Reconfiguration Interface
The figure above shows how to read data using the Ethernet reconfiguration Avalon® memory-mapped interface.
    • A: When read begins while o_reconfig_eth_waitrequest is high, you must hold the read request (i_reconfig_eth_read) until o_reconfig_eth_waitrequest deasserts.

      Then, the requested read data is available on the read port on the cycle when o_reconfig_eth_readdata_valid is high.

    • When read begins while o_reconfig_eth_waitrequest is low:
      • B: The o_reconfig_eth_waitrequest signal asserts on the same clock cycle as the read request (i_reconfig_eth_read).
      • C: The read request holds until o_reconfig_eth_waitrequest deasserts.

        Then, the requested read data is available on the read cycle when o_reconfig_eth_readdata_valid is high.

  • Read request can take a variable amount of time to complete.
  • You cannot perform read and write requests at the same time.
  • The Avalon® memory-mapped interface processes one read request at a time.
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