// SPDX-License-Identifier: CERN-OHL-S-2.0 /* Copyright (c) 2015-2025 FPGA Ninja, LLC Authors: - Alex Forencich */ `resetall `timescale 1ns / 1ps `default_nettype none /* * 1G Ethernet MAC with GMII interface */ module taxi_eth_mac_1g_gmii # ( parameter logic SIM = 1'b0, parameter string VENDOR = "XILINX", parameter string FAMILY = "virtex7", parameter logic PADDING_EN = 1'b1, parameter MIN_FRAME_LEN = 64, parameter logic PTP_TS_EN = 1'b0, parameter PTP_TS_W = 96, parameter logic PFC_EN = 1'b0, parameter logic PAUSE_EN = PFC_EN, parameter logic STAT_EN = 1'b0, parameter STAT_TX_LEVEL = 1, parameter STAT_RX_LEVEL = STAT_TX_LEVEL, parameter STAT_ID_BASE = 0, parameter STAT_UPDATE_PERIOD = 1024, parameter logic STAT_STR_EN = 1'b0, parameter logic [8*8-1:0] STAT_PREFIX_STR = "MAC" ) ( input wire logic gtx_clk, input wire logic gtx_rst, output wire logic rx_clk, output wire logic rx_rst, output wire logic tx_clk, output wire logic tx_rst, /* * Transmit interface (AXI stream) */ taxi_axis_if.snk s_axis_tx, taxi_axis_if.src m_axis_tx_cpl, /* * Receive interface (AXI stream) */ taxi_axis_if.src m_axis_rx, /* * GMII interface */ input wire logic gmii_rx_clk, input wire logic [7:0] gmii_rxd, input wire logic gmii_rx_dv, input wire logic gmii_rx_er, input wire logic mii_tx_clk, output wire logic gmii_tx_clk, output wire logic [7:0] gmii_txd, output wire logic gmii_tx_en, output wire logic gmii_tx_er, /* * PTP */ input wire logic [PTP_TS_W-1:0] tx_ptp_ts = '0, input wire logic [PTP_TS_W-1:0] rx_ptp_ts = '0, /* * Link-level Flow Control (LFC) (IEEE 802.3 annex 31B PAUSE) */ input wire logic tx_lfc_req = 1'b0, input wire logic tx_lfc_resend = 1'b0, input wire logic rx_lfc_en = 1'b0, output wire logic rx_lfc_req, input wire logic rx_lfc_ack = 1'b0, /* * Priority Flow Control (PFC) (IEEE 802.3 annex 31D PFC) */ input wire logic [7:0] tx_pfc_req = '0, input wire logic tx_pfc_resend = 1'b0, input wire logic [7:0] rx_pfc_en = '0, output wire logic [7:0] rx_pfc_req, input wire logic [7:0] rx_pfc_ack = '0, /* * Pause interface */ input wire logic tx_lfc_pause_en = 1'b0, input wire logic tx_pause_req = 1'b0, output wire logic tx_pause_ack, /* * Statistics */ input wire logic stat_clk, input wire logic stat_rst, taxi_axis_if.src m_axis_stat, /* * Status */ output wire logic tx_start_packet, output wire logic stat_tx_byte, output wire logic [15:0] stat_tx_pkt_len, output wire logic stat_tx_pkt_ucast, output wire logic stat_tx_pkt_mcast, output wire logic stat_tx_pkt_bcast, output wire logic stat_tx_pkt_vlan, output wire logic stat_tx_pkt_good, output wire logic stat_tx_pkt_bad, output wire logic stat_tx_err_oversize, output wire logic stat_tx_err_user, output wire logic stat_tx_err_underflow, output wire logic rx_start_packet, output wire logic stat_rx_byte, output wire logic [15:0] stat_rx_pkt_len, output wire logic stat_rx_pkt_fragment, output wire logic stat_rx_pkt_jabber, output wire logic stat_rx_pkt_ucast, output wire logic stat_rx_pkt_mcast, output wire logic stat_rx_pkt_bcast, output wire logic stat_rx_pkt_vlan, output wire logic stat_rx_pkt_good, output wire logic stat_rx_pkt_bad, output wire logic stat_rx_err_oversize, output wire logic stat_rx_err_bad_fcs, output wire logic stat_rx_err_bad_block, output wire logic stat_rx_err_framing, output wire logic stat_rx_err_preamble, input wire logic stat_rx_fifo_drop = 1'b0, output wire logic [1:0] link_speed, output wire logic stat_tx_mcf, output wire logic stat_rx_mcf, output wire logic stat_tx_lfc_pkt, output wire logic stat_tx_lfc_xon, output wire logic stat_tx_lfc_xoff, output wire logic stat_tx_lfc_paused, output wire logic stat_tx_pfc_pkt, output wire logic [7:0] stat_tx_pfc_xon, output wire logic [7:0] stat_tx_pfc_xoff, output wire logic [7:0] stat_tx_pfc_paused, output wire logic stat_rx_lfc_pkt, output wire logic stat_rx_lfc_xon, output wire logic stat_rx_lfc_xoff, output wire logic stat_rx_lfc_paused, output wire logic stat_rx_pfc_pkt, output wire logic [7:0] stat_rx_pfc_xon, output wire logic [7:0] stat_rx_pfc_xoff, output wire logic [7:0] stat_rx_pfc_paused, /* * Configuration */ input wire logic [15:0] cfg_tx_max_pkt_len = 16'd1518, input wire logic [7:0] cfg_tx_ifg = 8'd12, input wire logic cfg_tx_enable = 1'b1, input wire logic [15:0] cfg_rx_max_pkt_len = 16'd1518, input wire logic cfg_rx_enable = 1'b1, input wire logic [47:0] cfg_mcf_rx_eth_dst_mcast = 48'h01_80_C2_00_00_01, input wire logic cfg_mcf_rx_check_eth_dst_mcast = 1'b1, input wire logic [47:0] cfg_mcf_rx_eth_dst_ucast = 48'd0, input wire logic cfg_mcf_rx_check_eth_dst_ucast = 1'b0, input wire logic [47:0] cfg_mcf_rx_eth_src = 48'd0, input wire logic cfg_mcf_rx_check_eth_src = 1'b0, input wire logic [15:0] cfg_mcf_rx_eth_type = 16'h8808, input wire logic [15:0] cfg_mcf_rx_opcode_lfc = 16'h0001, input wire logic cfg_mcf_rx_check_opcode_lfc = 1'b1, input wire logic [15:0] cfg_mcf_rx_opcode_pfc = 16'h0101, input wire logic cfg_mcf_rx_check_opcode_pfc = 1'b1, input wire logic cfg_mcf_rx_forward = 1'b0, input wire logic cfg_mcf_rx_enable = 1'b0, input wire logic [47:0] cfg_tx_lfc_eth_dst = 48'h01_80_C2_00_00_01, input wire logic [47:0] cfg_tx_lfc_eth_src = 48'h80_23_31_43_54_4C, input wire logic [15:0] cfg_tx_lfc_eth_type = 16'h8808, input wire logic [15:0] cfg_tx_lfc_opcode = 16'h0001, input wire logic cfg_tx_lfc_en = 1'b0, input wire logic [15:0] cfg_tx_lfc_quanta = 16'hffff, input wire logic [15:0] cfg_tx_lfc_refresh = 16'h7fff, input wire logic [47:0] cfg_tx_pfc_eth_dst = 48'h01_80_C2_00_00_01, input wire logic [47:0] cfg_tx_pfc_eth_src = 48'h80_23_31_43_54_4C, input wire logic [15:0] cfg_tx_pfc_eth_type = 16'h8808, input wire logic [15:0] cfg_tx_pfc_opcode = 16'h0101, input wire logic cfg_tx_pfc_en = 1'b0, input wire logic [15:0] cfg_tx_pfc_quanta[8] = '{8{16'hffff}}, input wire logic [15:0] cfg_tx_pfc_refresh[8] = '{8{16'h7fff}}, input wire logic [15:0] cfg_rx_lfc_opcode = 16'h0001, input wire logic cfg_rx_lfc_en = 1'b0, input wire logic [15:0] cfg_rx_pfc_opcode = 16'h0101, input wire logic cfg_rx_pfc_en = 1'b0 ); reg [1:0] link_speed_reg = 2'b10; reg mii_select_reg = 1'b0; wire tx_mii_select_sync; taxi_sync_signal #( .WIDTH(1), .N(2) ) tx_mii_select_sync_inst ( .clk(tx_clk), .in(mii_select_reg), .out(tx_mii_select_sync) ); wire rx_mii_select_sync; taxi_sync_signal #( .WIDTH(1), .N(2) ) rx_mii_select_sync_inst ( .clk(rx_clk), .in(mii_select_reg), .out(rx_mii_select_sync) ); // PHY speed detection reg [2:0] rx_prescale = 3'd0; always_ff @(posedge rx_clk) begin rx_prescale <= rx_prescale + 3'd1; end wire rx_prescale_sync; taxi_sync_signal #( .WIDTH(1), .N(2) ) rx_prescale_sync_inst ( .clk(gtx_clk), .in(rx_prescale[2]), .out(rx_prescale_sync) ); reg [6:0] rx_speed_count_1 = 0; reg [1:0] rx_speed_count_2 = 0; reg rx_prescale_sync_last_reg = 1'b0; always_ff @(posedge gtx_clk) begin rx_prescale_sync_last_reg <= rx_prescale_sync; rx_speed_count_1 <= rx_speed_count_1 + 1; if (rx_prescale_sync ^ rx_prescale_sync_last_reg) begin rx_speed_count_2 <= rx_speed_count_2 + 1; end if (&rx_speed_count_1) begin // reference count overflow - 10M rx_speed_count_1 <= 0; rx_speed_count_2 <= 0; link_speed_reg <= 2'b00; mii_select_reg <= 1'b1; end if (&rx_speed_count_2) begin // prescaled count overflow - 100M or 1000M rx_speed_count_1 <= 0; rx_speed_count_2 <= 0; if (rx_speed_count_1[6:5] != 0) begin // large reference count - 100M link_speed_reg <= 2'b01; mii_select_reg <= 1'b1; end else begin // small reference count - 1000M link_speed_reg <= 2'b10; mii_select_reg <= 1'b0; end end if (gtx_rst) begin rx_speed_count_1 <= 0; rx_speed_count_2 <= 0; link_speed_reg <= 2'b10; mii_select_reg <= 1'b0; end end assign link_speed = link_speed_reg; wire [7:0] mac_gmii_rxd; wire mac_gmii_rx_dv; wire mac_gmii_rx_er; wire [7:0] mac_gmii_txd; wire mac_gmii_tx_en; wire mac_gmii_tx_er; taxi_gmii_phy_if #( .SIM(SIM), .VENDOR(VENDOR), .FAMILY(FAMILY) ) gmii_phy_if_inst ( .gtx_clk(gtx_clk), .gtx_rst(gtx_rst), /* * GMII interface to MAC */ .mac_gmii_rx_clk(rx_clk), .mac_gmii_rx_rst(rx_rst), .mac_gmii_rxd(mac_gmii_rxd), .mac_gmii_rx_dv(mac_gmii_rx_dv), .mac_gmii_rx_er(mac_gmii_rx_er), .mac_gmii_tx_clk(tx_clk), .mac_gmii_tx_rst(tx_rst), .mac_gmii_txd(mac_gmii_txd), .mac_gmii_tx_en(mac_gmii_tx_en), .mac_gmii_tx_er(mac_gmii_tx_er), /* * GMII interface to PHY */ .phy_gmii_rx_clk(gmii_rx_clk), .phy_gmii_rxd(gmii_rxd), .phy_gmii_rx_dv(gmii_rx_dv), .phy_gmii_rx_er(gmii_rx_er), .phy_mii_tx_clk(mii_tx_clk), .phy_gmii_tx_clk(gmii_tx_clk), .phy_gmii_txd(gmii_txd), .phy_gmii_tx_en(gmii_tx_en), .phy_gmii_tx_er(gmii_tx_er), .mii_select(mii_select_reg) ); taxi_eth_mac_1g #( .DATA_W(8), .PADDING_EN(PADDING_EN), .MIN_FRAME_LEN(MIN_FRAME_LEN), .PTP_TS_EN(PTP_TS_EN), .PTP_TS_W(PTP_TS_W), .PFC_EN(PFC_EN), .PAUSE_EN(PAUSE_EN), .STAT_EN(STAT_EN), .STAT_TX_LEVEL(STAT_TX_LEVEL), .STAT_RX_LEVEL(STAT_RX_LEVEL), .STAT_ID_BASE(STAT_ID_BASE), .STAT_UPDATE_PERIOD(STAT_UPDATE_PERIOD), .STAT_STR_EN(STAT_STR_EN), .STAT_PREFIX_STR(STAT_PREFIX_STR) ) eth_mac_1g_inst ( .tx_clk(tx_clk), .tx_rst(tx_rst), .rx_clk(rx_clk), .rx_rst(rx_rst), /* * Transmit interface (AXI stream) */ .s_axis_tx(s_axis_tx), .m_axis_tx_cpl(m_axis_tx_cpl), /* * Receive interface (AXI stream) */ .m_axis_rx(m_axis_rx), /* * GMII interface */ .gmii_rxd(mac_gmii_rxd), .gmii_rx_dv(mac_gmii_rx_dv), .gmii_rx_er(mac_gmii_rx_er), .gmii_txd(mac_gmii_txd), .gmii_tx_en(mac_gmii_tx_en), .gmii_tx_er(mac_gmii_tx_er), /* * PTP */ .tx_ptp_ts(tx_ptp_ts), .rx_ptp_ts(rx_ptp_ts), /* * Link-level Flow Control (LFC) (IEEE 802.3 annex 31B PAUSE) */ .tx_lfc_req(tx_lfc_req), .tx_lfc_resend(tx_lfc_resend), .rx_lfc_en(rx_lfc_en), .rx_lfc_req(rx_lfc_req), .rx_lfc_ack(rx_lfc_ack), /* * Priority Flow Control (PFC) (IEEE 802.3 annex 31D PFC) */ .tx_pfc_req(tx_pfc_req), .tx_pfc_resend(tx_pfc_resend), .rx_pfc_en(rx_pfc_en), .rx_pfc_req(rx_pfc_req), .rx_pfc_ack(rx_pfc_ack), /* * Pause interface */ .tx_lfc_pause_en(tx_lfc_pause_en), .tx_pause_req(tx_pause_req), .tx_pause_ack(tx_pause_ack), /* * Control */ .rx_clk_enable(1'b1), .tx_clk_enable(1'b1), .rx_mii_select(rx_mii_select_sync), .tx_mii_select(tx_mii_select_sync), /* * Statistics */ .stat_clk(stat_clk), .stat_rst(stat_rst), .m_axis_stat(m_axis_stat), /* * Status */ .tx_start_packet(tx_start_packet), .stat_tx_byte(stat_tx_byte), .stat_tx_pkt_len(stat_tx_pkt_len), .stat_tx_pkt_ucast(stat_tx_pkt_ucast), .stat_tx_pkt_mcast(stat_tx_pkt_mcast), .stat_tx_pkt_bcast(stat_tx_pkt_bcast), .stat_tx_pkt_vlan(stat_tx_pkt_vlan), .stat_tx_pkt_good(stat_tx_pkt_good), .stat_tx_pkt_bad(stat_tx_pkt_bad), .stat_tx_err_oversize(stat_tx_err_oversize), .stat_tx_err_user(stat_tx_err_user), .stat_tx_err_underflow(stat_tx_err_underflow), .rx_start_packet(rx_start_packet), .stat_rx_byte(stat_rx_byte), .stat_rx_pkt_len(stat_rx_pkt_len), .stat_rx_pkt_fragment(stat_rx_pkt_fragment), .stat_rx_pkt_jabber(stat_rx_pkt_jabber), .stat_rx_pkt_ucast(stat_rx_pkt_ucast), .stat_rx_pkt_mcast(stat_rx_pkt_mcast), .stat_rx_pkt_bcast(stat_rx_pkt_bcast), .stat_rx_pkt_vlan(stat_rx_pkt_vlan), .stat_rx_pkt_good(stat_rx_pkt_good), .stat_rx_pkt_bad(stat_rx_pkt_bad), .stat_rx_err_oversize(stat_rx_err_oversize), .stat_rx_err_bad_fcs(stat_rx_err_bad_fcs), .stat_rx_err_bad_block(stat_rx_err_bad_block), .stat_rx_err_framing(stat_rx_err_framing), .stat_rx_err_preamble(stat_rx_err_preamble), .stat_rx_fifo_drop(stat_rx_fifo_drop), .stat_tx_mcf(stat_tx_mcf), .stat_rx_mcf(stat_rx_mcf), .stat_tx_lfc_pkt(stat_tx_lfc_pkt), .stat_tx_lfc_xon(stat_tx_lfc_xon), .stat_tx_lfc_xoff(stat_tx_lfc_xoff), .stat_tx_lfc_paused(stat_tx_lfc_paused), .stat_tx_pfc_pkt(stat_tx_pfc_pkt), .stat_tx_pfc_xon(stat_tx_pfc_xon), .stat_tx_pfc_xoff(stat_tx_pfc_xoff), .stat_tx_pfc_paused(stat_tx_pfc_paused), .stat_rx_lfc_pkt(stat_rx_lfc_pkt), .stat_rx_lfc_xon(stat_rx_lfc_xon), .stat_rx_lfc_xoff(stat_rx_lfc_xoff), .stat_rx_lfc_paused(stat_rx_lfc_paused), .stat_rx_pfc_pkt(stat_rx_pfc_pkt), .stat_rx_pfc_xon(stat_rx_pfc_xon), .stat_rx_pfc_xoff(stat_rx_pfc_xoff), .stat_rx_pfc_paused(stat_rx_pfc_paused), /* * Configuration */ .cfg_tx_max_pkt_len(cfg_tx_max_pkt_len), .cfg_tx_ifg(cfg_tx_ifg), .cfg_tx_enable(cfg_tx_enable), .cfg_rx_max_pkt_len(cfg_rx_max_pkt_len), .cfg_rx_enable(cfg_rx_enable), .cfg_mcf_rx_eth_dst_mcast(cfg_mcf_rx_eth_dst_mcast), .cfg_mcf_rx_check_eth_dst_mcast(cfg_mcf_rx_check_eth_dst_mcast), .cfg_mcf_rx_eth_dst_ucast(cfg_mcf_rx_eth_dst_ucast), .cfg_mcf_rx_check_eth_dst_ucast(cfg_mcf_rx_check_eth_dst_ucast), .cfg_mcf_rx_eth_src(cfg_mcf_rx_eth_src), .cfg_mcf_rx_check_eth_src(cfg_mcf_rx_check_eth_src), .cfg_mcf_rx_eth_type(cfg_mcf_rx_eth_type), .cfg_mcf_rx_opcode_lfc(cfg_mcf_rx_opcode_lfc), .cfg_mcf_rx_check_opcode_lfc(cfg_mcf_rx_check_opcode_lfc), .cfg_mcf_rx_opcode_pfc(cfg_mcf_rx_opcode_pfc), .cfg_mcf_rx_check_opcode_pfc(cfg_mcf_rx_check_opcode_pfc), .cfg_mcf_rx_forward(cfg_mcf_rx_forward), .cfg_mcf_rx_enable(cfg_mcf_rx_enable), .cfg_tx_lfc_eth_dst(cfg_tx_lfc_eth_dst), .cfg_tx_lfc_eth_src(cfg_tx_lfc_eth_src), .cfg_tx_lfc_eth_type(cfg_tx_lfc_eth_type), .cfg_tx_lfc_opcode(cfg_tx_lfc_opcode), .cfg_tx_lfc_en(cfg_tx_lfc_en), .cfg_tx_lfc_quanta(cfg_tx_lfc_quanta), .cfg_tx_lfc_refresh(cfg_tx_lfc_refresh), .cfg_tx_pfc_eth_dst(cfg_tx_pfc_eth_dst), .cfg_tx_pfc_eth_src(cfg_tx_pfc_eth_src), .cfg_tx_pfc_eth_type(cfg_tx_pfc_eth_type), .cfg_tx_pfc_opcode(cfg_tx_pfc_opcode), .cfg_tx_pfc_en(cfg_tx_pfc_en), .cfg_tx_pfc_quanta(cfg_tx_pfc_quanta), .cfg_tx_pfc_refresh(cfg_tx_pfc_refresh), .cfg_rx_lfc_opcode(cfg_rx_lfc_opcode), .cfg_rx_lfc_en(cfg_rx_lfc_en), .cfg_rx_pfc_opcode(cfg_rx_pfc_opcode), .cfg_rx_pfc_en(cfg_rx_pfc_en) ); endmodule `resetall