Verilog Ethernet Components Readme

For more information and updates: http://alexforencich.com/wiki/en/verilog/ethernet/start

GitHub repository: https://github.com/alexforencich/verilog-ethernet

Introduction

Collection of Ethernet-related components for gigabit, 10G, and 25G packet processing (8 bit and 64 bit datapaths). Includes modules for handling Ethernet frames as well as IP, UDP, and ARP and the components for constructing a complete UDP/IP stack. Includes MAC modules for gigabit and 10G/25G, a 10G/25G PCS/PMA PHY module, and a 10G/25G combination MAC/PCS/PMA module. Includes various PTP related components for implementing systems that require precise time synchronization. Also includes full cocotb testbenches that utilize cocotbext-eth.

For IP and ARP support only, use ip_complete (1G) or ip_complete_64 (10G/25G).

For UDP, IP, and ARP support, use udp_complete (1G) or udp_complete_64 (10G/25G).

Top level gigabit and 10G/25G MAC modules are eth_mac_*, with various interfaces and with/without FIFOs. Top level 10G/25G PCS/PMA PHY module is eth_phy_10g. Top level 10G/25G MAC/PCS/PMA combination module is eth_mac_phy_10g.

PTP components include a configurable PTP clock (ptp_clock), a PTP clock CDC module (ptp_clock_cdc) for transferring PTP time across clock domains, and a configurable PTP period output module for precisely generating arbitrary frequencies from PTP time.

Example designs implementing a simple UDP echo server are included for the following boards:

• Alpha Data ADM-PCIE-9V3 (Xilinx Virtex UltraScale+ XCVU3P)
• Digilent Arty A7 (Xilinx Artix 7 XC7A35T)
• Digilent Atlys (Xilinx Spartan 6 XC6SLX45)
• Intel Cyclone 10 LP (Intel Cyclone 10 10CL025YU256I7G)
• Terasic DE2-115 (Intel Cyclone IV E EP4CE115F29C7)
• Terasic DE5-Net (Intel Stratix V 5SGXEA7N2F45C2)
• Exablaze ExaNIC X10 (Xilinx Kintex UltraScale XCKU035)
• Exablaze ExaNIC X25 (Xilinx Kintex UltraScale+ XCKU3P)
• HiTech Global HTG-V6HXT-100GIG-565 (Xilinx Virtex 6 XC6VHX565T)
• Silicom [email protected] (Xilinx Kintex UltraScale+ XCKU15P)
• Xilinx KC705 (Xilinx Kintex 7 XC7K325T)
• Xilinx ML605 (Xilinx Virtex 6 XC6VLX240T)
• NetFPGA SUME (Xilinx Virtex 7 XC7V690T)
• Digilent Nexys Video (Xilinx Artix 7 XC7XC7A200T)
• Xilinx Alveo U50 (Xilinx Virtex UltraScale+ XCU50)
• Xilinx Alveo U200 (Xilinx Virtex UltraScale+ XCU200)
• Xilinx Alveo U250 (Xilinx Virtex UltraScale+ XCU250)
• Xilinx Alveo U280 (Xilinx Virtex UltraScale+ XCU280)
• Xilinx VCU108 (Xilinx Virtex UltraScale XCVU095)
• Xilinx VCU118 (Xilinx Virtex UltraScale+ XCVU9P)
• Xilinx VCU1525 (Xilinx Virtex UltraScale+ XCVU9P)
• Xilinx ZCU102 (Xilinx Zynq UltraScale+ XCZU9EG)
• Xilinx ZCU106 (Xilinx Zynq UltraScale+ XCZU7EV)

Documentation

arp module

ARP handling logic with parametrizable retry timeout parameters and parametrizable datapath.

arp_cache module

Basic hash-based cache for ARP entries. Parametrizable depth.

arp_eth_rx module

ARP frame receiver with parametrizable datapath.

arp_eth_tx module

ARP frame transmitter with parametrizable datapath.

axis_eth_fcs module

Ethernet frame check sequence calculator.

axis_eth_fcs_64 module

Ethernet frame check sequence calculator with 64 bit datapath for 10G/25G Ethernet.

axis_eth_fcs_check module

Ethernet frame check sequence checker.

axis_eth_fcs_insert module

Ethernet frame check sequence inserter.

axis_gmii_rx module

AXI stream GMII/MII frame receiver with clock enable and MII select.

axis_gmii_tx module

AXI stream GMII/MII frame transmitter with clock enable and MII select.

axis_xgmii_rx_32 module

AXI stream XGMII frame receiver with 32 bit datapath.

axis_xgmii_rx_64 module

AXI stream XGMII frame receiver with 64 bit datapath.

axis_xgmii_tx_32 module

AXI stream XGMII frame transmitter with 32 bit datapath.

axis_xgmii_tx_64 module

AXI stream XGMII frame transmitter with 64 bit datapath.

eth_arb_mux module

Ethernet frame arbitrated muliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

eth_axis_rx module

Ethernet frame receiver with parametrizable datapath.

eth_axis_tx module

Ethernet frame transmitter with parametrizable datapath.

eth_demux module

Ethernet frame demuliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

eth_mac_1g module

Gigabit Ethernet MAC with GMII interface.

eth_mac_1g_fifo module

Gigabit Ethernet MAC with GMII interface and FIFOs.

eth_mac_1g_gmii module

Tri-mode Ethernet MAC with GMII/MII interface and automatic PHY rate adaptation logic.

eth_mac_1g_gmii_fifo module

Tri-mode Ethernet MAC with GMII/MII interface, FIFOs, and automatic PHY rate adaptation logic.

eth_mac_1g_rgmii module

Tri-mode Ethernet MAC with RGMII interface and automatic PHY rate adaptation logic.

eth_mac_1g_rgmii_fifo module

Tri-mode Ethernet MAC with RGMII interface, FIFOs, and automatic PHY rate adaptation logic.

eth_mac_10g module

10G/25G Ethernet MAC with XGMII interface. Datapath selectable between 32 and 64 bits.

eth_mac_10g_fifo module

10G/25G Ethernet MAC with XGMII interface and FIFOs. Datapath selectable between 32 and 64 bits.

eth_mac_mii module

Ethernet MAC with MII interface.

eth_mac_mii_fifo module

Ethernet MAC with MII interface and FIFOs.

eth_mac_phy_10g module

10G/25G Ethernet MAC/PHY combination module with SERDES interface.

eth_mac_phy_10g_fifo module

10G/25G Ethernet MAC/PHY combination module with SERDES interface and FIFOs.

eth_mac_phy_10g_rx module

10G/25G Ethernet MAC/PHY combination module with SERDES interface, RX path.

eth_mac_phy_10g_tx module

10G/25G Ethernet MAC/PHY combination module with SERDES interface, TX path.

eth_mux module

Ethernet frame muliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

eth_phy_10g module

10G/25G Ethernet PCS/PMA PHY.

eth_phy_10g_rx module

10G/25G Ethernet PCS/PMA PHY receive-side logic.

eth_phy_10g_rx_ber_mon module

10G/25G Ethernet PCS/PMA PHY BER monitor.

eth_phy_10g_rx_frame_sync module

10G/25G Ethernet PCS/PMA PHY frame synchronizer.

eth_phy_10g_tx module

10G/25G Ethernet PCS/PMA PHY transmit-side logic.

gmii_phy_if module

GMII/MII PHY interface and clocking logic.

ip module

IPv4 block with 8 bit data width for gigabit Ethernet. Manages IPv4 packet transmssion and reception. Interfaces with ARP module for MAC address lookup.

ip_64 module

IPv4 block with 64 bit data width for 10G/25G Ethernet. Manages IPv4 packet transmssion and reception. Interfaces with ARP module for MAC address lookup.

ip_arb_mux module

IP frame arbitrated muliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

ip_complete module

IPv4 module with ARP integration.

Top level for gigabit IP stack.

ip_complete_64 module

IPv4 module with ARP integration and 64 bit data width for 10G/25G Ethernet.

Top level for 10G/25G IP stack.

ip_demux module

IP frame demuliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

ip_eth_rx module

IP frame receiver.

ip_eth_rx_64 module

IP frame receiver with 64 bit datapath for 10G/25G Ethernet.

ip_eth_tx module

IP frame transmitter.

ip_eth_tx_64 module

IP frame transmitter with 64 bit datapath for 10G/25G Ethernet.

ip_mux module

IP frame muliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

lfsr module

Fully parametrizable combinatorial parallel LFSR/CRC module.

mii_phy_if module

MII PHY interface and clocking logic.

ptp_clock module

PTP clock module with PPS output. Generates both 64 bit and 96 bit timestamp formats. Fine frequeny adjustment supported with configurable fractional nanoseconds field.

ptp_clock_cdc module

PTP clock CDC module with PPS output. Use this module to transfer and deskew a free-running PTP clock across clock domains. Supports both 64 and 96 bit timestamp formats.

ptp_ts_extract module

PTP timestamp extract module. Use this module to extract a PTP timestamp embedded in the tuser sideband signal of an AXI stream interface.

ptp_perout module

PTP period output module. Generates a pulse output, configurable in absolute start time, period, and width, based on PTP time from a PTP clock.

rgmii_phy_if module

RGMII PHY interface and clocking logic.

udp module

UDP block with 8 bit data width for gigabit Ethernet. Manages UDP packet transmssion and reception.

udp_64 module

UDP block with 64 bit data width for 10G/25G Ethernet. Manages UDP packet transmssion and reception.

udp_arb_mux module

UDP frame arbitrated muliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

udp_checksum_gen module

UDP checksum generator module. Calculates UDP length, IP length, and UDP checksum fields.

udp_checksum_gen_64 module

UDP checksum generator module with 64 bit datapath. Calculates UDP length, IP length, and UDP checksum fields.

udp_complete module

UDP module with IPv4 and ARP integration.

Top level for gigabit UDP stack.

udp_complete_64 module

UDP module with IPv4 and ARP integration and 64 bit data width for 10G Ethernet.

Top level for 10G/25G UDP stack.

udp_demux module

UDP frame demuliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

udp_ip_rx module

UDP frame receiver.

udp_ip_rx_64 module

UDP frame receiver with 64 bit datapath for 10G/25G Ethernet.

udp_ip_tx module

UDP frame transmitter.

udp_ip_tx_64 module

UDP frame transmitter with 64 bit datapath for 10G/25G Ethernet.

udp_mux module

UDP frame muliplexer with parametrizable data width and port count. Supports priority and round-robin arbitration.

xgmii_baser_dec_64 module

XGMII 10GBASE-R decoder for 10G PCS/PMA PHY.

xgmii_baser_enc_64 module

XGMII 10GBASE-R encoder for 10G PCS/PMA PHY.

xgmii_deinterleave module

XGMII de-interleaver for interfacing with PHY cores that interleave the control and data lines.

xgmii_interleave module

XGMII interleaver for interfacing with PHY cores that interleave the control and data lines.

Common signals

tdata   : Data (width generally DATA_WIDTH)
tkeep   : Data word valid (width generally KEEP_WIDTH, present on _64 modules)
tvalid  : Data valid
tready  : Sink ready
tlast   : End-of-frame
tuser   : Bad frame (valid with tlast & tvalid)

Source Files

rtl/arp.v                       : ARP handling logic
rtl/arp_cache.v                 : ARP LRU cache
rtl/arp_eth_rx.v                : ARP frame receiver
rtl/arp_eth_tx.v                : ARP frame transmitter
rtl/eth_arb_mux.py              : Ethernet frame arbitrated multiplexer generator
rtl/axis_eth_fcs.v              : Ethernet FCS calculator
rtl/axis_eth_fcs_64.v           : Ethernet FCS calculator (64 bit)
rtl/axis_eth_fcs_insert.v       : Ethernet FCS inserter
rtl/axis_eth_fcs_check.v        : Ethernet FCS checker
rtl/axis_gmii_rx.v              : AXI stream GMII/MII receiver
rtl/axis_gmii_tx.v              : AXI stream GMII/MII transmitter
rtl/axis_xgmii_rx_32.v          : AXI stream XGMII receiver (32 bit)
rtl/axis_xgmii_rx_64.v          : AXI stream XGMII receiver (64 bit)
rtl/axis_xgmii_tx_32.v          : AXI stream XGMII transmitter (32 bit)
rtl/axis_xgmii_tx_64.v          : AXI stream XGMII transmitter (64 bit)
rtl/eth_arb_mux.v               : Ethernet frame arbitrated multiplexer
rtl/eth_axis_rx.v               : Ethernet frame receiver
rtl/eth_axis_tx.v               : Ethernet frame transmitter
rtl/eth_demux.v                 : Ethernet frame demultiplexer
rtl/eth_mac_1g.v                : Gigabit Ethernet GMII MAC
rtl/eth_mac_1g_fifo.v           : Gigabit Ethernet GMII MAC with FIFO
rtl/eth_mac_1g_gmii.v           : Tri-mode Ethernet GMII/MII MAC
rtl/eth_mac_1g_gmii_fifo.v      : Tri-mode Ethernet GMII/MII MAC with FIFO
rtl/eth_mac_1g_rgmii.v          : Tri-mode Ethernet RGMII MAC
rtl/eth_mac_1g_rgmii_fifo.v     : Tri-mode Ethernet RGMII MAC with FIFO
rtl/eth_mac_10g.v               : 10G/25G Ethernet XGMII MAC
rtl/eth_mac_10g_fifo.v          : 10G/25G Ethernet XGMII MAC with FIFO
rtl/eth_mac_mii.v               : Ethernet MII MAC
rtl/eth_mac_mii_fifo.v          : Ethernet MII MAC with FIFO
rtl/eth_mac_phy_10g.v           : 10G/25G Ethernet XGMII MAC/PHY
rtl/eth_mac_phy_10g_fifo.v      : 10G/25G Ethernet XGMII MAC/PHY with FIFO
rtl/eth_mac_phy_10g_rx.v        : 10G/25G Ethernet XGMII MAC/PHY RX with FIFO
rtl/eth_mac_phy_10g_tx.v        : 10G/25G Ethernet XGMII MAC/PHY TX with FIFO
rtl/eth_mux.v                   : Ethernet frame multiplexer
rtl/gmii_phy_if.v               : GMII PHY interface
rtl/iddr.v                      : Generic DDR input register
rtl/ip.v                        : IPv4 block
rtl/ip_64.v                     : IPv4 block (64 bit)
rtl/ip_arb_mux.v                : IP frame arbitrated multiplexer
rtl/ip_complete.v               : IPv4 stack (IP-ARP integration)
rtl/ip_complete_64.v            : IPv4 stack (IP-ARP integration) (64 bit)
rtl/ip_demux.v                  : IP frame demultiplexer
rtl/ip_eth_rx.v                 : IPv4 frame receiver
rtl/ip_eth_rx_64.v              : IPv4 frame receiver (64 bit)
rtl/ip_eth_tx.v                 : IPv4 frame transmitter
rtl/ip_eth_tx_64.v              : IPv4 frame transmitter (64 bit)
rtl/ip_mux.v                    : IP frame multiplexer
rtl/lfsr.v                      : Generic LFSR/CRC module
rtl/mii_phy_if.v                : MII PHY interface
rtl/oddr.v                      : Generic DDR output register
rtl/ptp_clock.v                 : PTP clock
rtl/ptp_clock_cdc.v             : PTP clock CDC
rtl/ptp_ts_extract.v            : PTP timestamp extract
rtl/ptp_perout.v                : PTP period out
rtl/rgmii_phy_if.v              : RGMII PHY interface
rtl/ssio_ddr_in.v               : Generic source synchronous IO DDR input module
rtl/ssio_ddr_in_diff.v          : Generic source synchronous IO DDR differential input module
rtl/ssio_ddr_out.v              : Generic source synchronous IO DDR output module
rtl/ssio_ddr_out_diff.v         : Generic source synchronous IO DDR differential output module
rtl/ssio_sdr_in.v               : Generic source synchronous IO SDR input module
rtl/ssio_sdr_in_diff.v          : Generic source synchronous IO SDR differential input module
rtl/ssio_sdr_out.v              : Generic source synchronous IO SDR output module
rtl/ssio_sdr_out_diff.v         : Generic source synchronous IO SDR differential output module
rtl/udp.v                       : UDP block
rtl/udp_64.v                    : UDP block (64 bit)
rtl/udp_arb_mux.v               : UDP frame arbitrated multiplexer
rtl/udp_checksum_gen.v          : UDP checksum generator
rtl/udp_checksum_gen_64.v       : UDP checksum generator (64 bit)
rtl/udp_complete.v              : UDP stack (IP-ARP-UDP)
rtl/udp_complete_64.v           : UDP stack (IP-ARP-UDP) (64 bit)
rtl/udp_demux.v                 : UDP frame demultiplexer
rtl/udp_ip_rx.v                 : UDP frame receiver
rtl/udp_ip_rx_64.v              : UDP frame receiver (64 bit)
rtl/udp_ip_tx.v                 : UDP frame transmitter
rtl/udp_ip_tx_64.v              : UDP frame transmitter (64 bit)
rtl/udp_mux.v                   : UDP frame multiplexer
rtl/xgmii_baser_dec_64.v        : XGMII 10GBASE-R decoder
rtl/xgmii_baser_enc_64.v        : XGMII 10GBASE-R encoder
rtl/xgmii_deinterleave.v        : XGMII data/control de-interleaver
rtl/xgmii_interleave.v          : XGMII data/control interleaver

AXI Stream Interface Example

transfer with header data

              __    __    __    __    __    __    __
clk        __/  \__/  \__/  \__/  \__/  \__/  \__/  \__
           ______________                   ___________
hdr_ready                \_________________/
                    _____ 
hdr_valid  ________/     \_____________________________
                    _____
hdr_data   XXXXXXXXX_HDR_XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                    ___________ _____ _____
tdata      XXXXXXXXX_A0________X_A1__X_A2__XXXXXXXXXXXX
                    ___________ _____ _____
tkeep      XXXXXXXXX_K0________X_K1__X_K2__XXXXXXXXXXXX
                    _______________________
tvalid     ________/                       \___________
                          _________________
tready     ______________/                 \___________
                                      _____
tlast      __________________________/     \___________

tuser      ____________________________________________

two byte transfer with sink pause after each byte

          __    __    __    __    __    __    __    __    __
clk    __/  \__/  \__/  \__/  \__/  \__/  \__/  \__/  \__/  \__
                _____ _________________
tdata  XXXXXXXXX_D0__X_D1______________XXXXXXXXXXXXXXXXXXXXXXXX
                _____ _________________
tkeep  XXXXXXXXX_K0__X_K1______________XXXXXXXXXXXXXXXXXXXXXXXX
                _______________________
tvalid ________/                       \_______________________
       ______________             _____             ___________
tready               \___________/     \___________/
                      _________________
tlast  ______________/                 \_______________________

tuser  ________________________________________________________

two back-to-back packets, no pauses

          __    __    __    __    __    __    __    __    __
clk    __/  \__/  \__/  \__/  \__/  \__/  \__/  \__/  \__/  \__
                _____ _____ _____ _____ _____ _____
tdata  XXXXXXXXX_A0__X_A1__X_A2__X_B0__X_B1__X_B2__XXXXXXXXXXXX
                _____ _____ _____ _____ _____ _____
tkeep  XXXXXXXXX_K0__X_K1__X_K2__X_K0__X_K1__X_K2__XXXXXXXXXXXX
                ___________________________________
tvalid ________/                                   \___________
       ________________________________________________________
tready
                            _____             _____
tlast  ____________________/     \___________/     \___________

tuser  ________________________________________________________

bad frame

          __    __    __    __    __    __
clk    __/  \__/  \__/  \__/  \__/  \__/  \__
                _____ _____ _____
tdata  XXXXXXXXX_A0__X_A1__X_A2__XXXXXXXXXXXX
                _____ _____ _____
tkeep  XXXXXXXXX_K0__X_K1__X_K2__XXXXXXXXXXXX
                _________________
tvalid ________/                 \___________
       ______________________________________
tready
                            _____
tlast  ____________________/     \___________
                            _____
tuser  ____________________/     \___________

Testing

Running the included testbenches requires cocotb, cocotbext-axi, cocotbext-eth, and Icarus Verilog. The testbenches can be run with pytest directly (requires cocotb-test), pytest via tox, or via cocotb makefiles.