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//
// Copyright 2014 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: LGPL-3.0-or-later
//
// Adapts from internal VITA to ethernet packets. Also handles ZPU and ethernet crossover interfaces.
module x300_eth_interface #(
parameter [15:0] PROTOVER = {8'd1, 8'd0},
parameter MTU = 10,
parameter NODE_INST = 0,
parameter RT_TBL_SIZE = 6,
parameter BASE = 0
) (
input clk, input reset,
input [15:0] device_id,
input set_stb, input [7:0] set_addr, input [31:0] set_data,
// Eth ports
output [63:0] eth_tx_tdata, output [3:0] eth_tx_tuser, output eth_tx_tlast, output eth_tx_tvalid, input eth_tx_tready,
input [63:0] eth_rx_tdata, input [3:0] eth_rx_tuser, input eth_rx_tlast, input eth_rx_tvalid, output eth_rx_tready,
// Vita router interface
output [63:0] e2v_tdata, output e2v_tlast, output e2v_tvalid, input e2v_tready,
input [63:0] v2e_tdata, input v2e_tlast, input v2e_tvalid, output v2e_tready,
// ZPU
output [63:0] e2z_tdata, output [3:0] e2z_tuser, output e2z_tlast, output e2z_tvalid, input e2z_tready,
input [63:0] z2e_tdata, input [3:0] z2e_tuser, input z2e_tlast, input z2e_tvalid, output z2e_tready
);
// UNUSED: BASE to BASE+7
localparam MY_ETH_ADDR_LO_REG = BASE + 8;
localparam MY_ETH_ADDR_HI_REG = BASE + 9;
localparam MY_IP_ADDR_REG = BASE + 10;
localparam MY_UDP_PORT_REG = BASE + 11;
// UNUSED: BASE+12 to BASE+15
wire [47:0] my_eth_addr;
wire [31:0] my_ipv4_addr;
wire [15:0] my_udp_chdr_port;
// MAC address for the dispatcher module.
// This value is used to determine if the packet is meant
// for this device should be consumed
setting_reg #(.my_addr(MY_ETH_ADDR_LO_REG), .awidth(8), .width(32)) sr_my_mac_lsb
(.clk(clk),.rst(reset),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out(my_eth_addr[31:0]),.changed());
setting_reg #(.my_addr(MY_ETH_ADDR_HI_REG), .awidth(8), .width(16)) sr_my_mac_msb
(.clk(clk),.rst(reset),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out(my_eth_addr[47:32]),.changed());
// IP address for the dispatcher module.
// This value is used to determine if the packet is addressed
// to this device
setting_reg #(.my_addr(MY_IP_ADDR_REG), .awidth(8), .width(32)) sr_my_ip
(.clk(clk),.rst(reset),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out(my_ipv4_addr[31:0]),.changed());
// This module supports one destinatio port
setting_reg #(.my_addr(MY_UDP_PORT_REG), .awidth(8), .width(16)) sr_udp_port
(.clk(clk),.rst(reset),.strobe(set_stb),.addr(set_addr),
.in(set_data),.out({my_udp_chdr_port[15:0]}),.changed());
eth_ipv4_chdr64_adapter #(
.PROTOVER (PROTOVER),
.MTU (MTU),
.CPU_FIFO_SIZE (MTU),
.RT_TBL_SIZE (RT_TBL_SIZE),
.NODE_INST (NODE_INST),
.DROP_UNKNOWN_MAC(1)
) eth_adapter_i (
.clk (clk ),
.rst (reset ),
.device_id (device_id ),
.s_mac_tdata (eth_rx_tdata ),
.s_mac_tuser (eth_rx_tuser ),
.s_mac_tlast (eth_rx_tlast ),
.s_mac_tvalid (eth_rx_tvalid ),
.s_mac_tready (eth_rx_tready ),
.m_mac_tdata (eth_tx_tdata ),
.m_mac_tuser (eth_tx_tuser ),
.m_mac_tlast (eth_tx_tlast ),
.m_mac_tvalid (eth_tx_tvalid ),
.m_mac_tready (eth_tx_tready ),
.s_chdr_tdata (v2e_tdata ),
.s_chdr_tlast (v2e_tlast ),
.s_chdr_tvalid (v2e_tvalid ),
.s_chdr_tready (v2e_tready ),
.m_chdr_tdata (e2v_tdata ),
.m_chdr_tlast (e2v_tlast ),
.m_chdr_tvalid (e2v_tvalid ),
.m_chdr_tready (e2v_tready ),
.s_cpu_tdata ({z2e_tdata[7:0], z2e_tdata[15:8],
z2e_tdata[23:16], z2e_tdata[31:24],
z2e_tdata[39:32], z2e_tdata[47:40],
z2e_tdata[55:48], z2e_tdata[63:56]}),
.s_cpu_tuser (z2e_tuser ),
.s_cpu_tlast (z2e_tlast ),
.s_cpu_tvalid (z2e_tvalid ),
.s_cpu_tready (z2e_tready ),
.m_cpu_tdata ({e2z_tdata[7:0], e2z_tdata[15:8],
e2z_tdata[23:16], e2z_tdata[31:24],
e2z_tdata[39:32], e2z_tdata[47:40],
e2z_tdata[55:48], e2z_tdata[63:56]}),
.m_cpu_tuser (e2z_tuser ),
.m_cpu_tlast (e2z_tlast ),
.m_cpu_tvalid (e2z_tvalid ),
.m_cpu_tready (e2z_tready ),
.my_eth_addr (my_eth_addr ),
.my_ipv4_addr (my_ipv4_addr ),
.my_udp_chdr_port(my_udp_chdr_port)
);
endmodule // x300_eth_interface
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