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448 lines
16 KiB
Verilog
448 lines
16 KiB
Verilog
/*
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Copyright (c) 2014 Alex Forencich
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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// Language: Verilog 2001
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`timescale 1ns / 1ps
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/*
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* IPv4 and ARP block, ethernet frame interface (64 bit datapath)
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*/
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module ip_complete_64 #(
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parameter ARP_CACHE_ADDR_WIDTH = 2,
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parameter ARP_REQUEST_RETRY_COUNT = 4,
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parameter ARP_REQUEST_RETRY_INTERVAL = 156250000*2,
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parameter ARP_REQUEST_TIMEOUT = 156250000*30
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)
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(
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input wire clk,
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input wire rst,
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/*
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* Ethernet frame input
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*/
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input wire input_eth_hdr_valid,
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output wire input_eth_hdr_ready,
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input wire [47:0] input_eth_dest_mac,
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input wire [47:0] input_eth_src_mac,
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input wire [15:0] input_eth_type,
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input wire [63:0] input_eth_payload_tdata,
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input wire [7:0] input_eth_payload_tkeep,
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input wire input_eth_payload_tvalid,
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output wire input_eth_payload_tready,
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input wire input_eth_payload_tlast,
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input wire input_eth_payload_tuser,
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/*
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* Ethernet frame output
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*/
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output wire output_eth_hdr_valid,
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input wire output_eth_hdr_ready,
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output wire [47:0] output_eth_dest_mac,
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output wire [47:0] output_eth_src_mac,
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output wire [15:0] output_eth_type,
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output wire [63:0] output_eth_payload_tdata,
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output wire [7:0] output_eth_payload_tkeep,
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output wire output_eth_payload_tvalid,
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input wire output_eth_payload_tready,
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output wire output_eth_payload_tlast,
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output wire output_eth_payload_tuser,
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/*
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* IP input
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*/
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input wire input_ip_hdr_valid,
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output wire input_ip_hdr_ready,
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input wire [5:0] input_ip_dscp,
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input wire [1:0] input_ip_ecn,
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input wire [15:0] input_ip_length,
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input wire [7:0] input_ip_ttl,
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input wire [7:0] input_ip_protocol,
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input wire [31:0] input_ip_source_ip,
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input wire [31:0] input_ip_dest_ip,
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input wire [63:0] input_ip_payload_tdata,
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input wire [7:0] input_ip_payload_tkeep,
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input wire input_ip_payload_tvalid,
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output wire input_ip_payload_tready,
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input wire input_ip_payload_tlast,
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input wire input_ip_payload_tuser,
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/*
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* IP output
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*/
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output wire output_ip_hdr_valid,
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input wire output_ip_hdr_ready,
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output wire [47:0] output_ip_eth_dest_mac,
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output wire [47:0] output_ip_eth_src_mac,
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output wire [15:0] output_ip_eth_type,
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output wire [3:0] output_ip_version,
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output wire [3:0] output_ip_ihl,
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output wire [5:0] output_ip_dscp,
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output wire [1:0] output_ip_ecn,
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output wire [15:0] output_ip_length,
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output wire [15:0] output_ip_identification,
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output wire [2:0] output_ip_flags,
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output wire [12:0] output_ip_fragment_offset,
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output wire [7:0] output_ip_ttl,
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output wire [7:0] output_ip_protocol,
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output wire [15:0] output_ip_header_checksum,
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output wire [31:0] output_ip_source_ip,
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output wire [31:0] output_ip_dest_ip,
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output wire [63:0] output_ip_payload_tdata,
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output wire [7:0] output_ip_payload_tkeep,
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output wire output_ip_payload_tvalid,
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input wire output_ip_payload_tready,
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output wire output_ip_payload_tlast,
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output wire output_ip_payload_tuser,
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/*
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* Status
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*/
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output wire rx_busy,
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output wire tx_busy,
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output wire rx_error_header_early_termination,
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output wire rx_error_payload_early_termination,
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output wire rx_error_invalid_header,
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output wire rx_error_invalid_checksum,
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output wire tx_error_payload_early_termination,
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output wire tx_error_arp_failed,
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/*
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* Configuration
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*/
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input wire [47:0] local_mac,
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input wire [31:0] local_ip,
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input wire [31:0] gateway_ip,
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input wire [31:0] subnet_mask,
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input wire clear_arp_cache
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);
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/*
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This module integrates the IP and ARP modules for a complete IP stack
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*/
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wire arp_request_valid;
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wire [31:0] arp_request_ip;
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wire arp_response_valid;
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wire arp_response_error;
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wire [47:0] arp_response_mac;
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wire ip_rx_eth_hdr_valid;
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wire ip_rx_eth_hdr_ready;
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wire [47:0] ip_rx_eth_dest_mac;
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wire [47:0] ip_rx_eth_src_mac;
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wire [15:0] ip_rx_eth_type;
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wire [63:0] ip_rx_eth_payload_tdata;
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wire [7:0] ip_rx_eth_payload_tkeep;
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wire ip_rx_eth_payload_tvalid;
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wire ip_rx_eth_payload_tready;
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wire ip_rx_eth_payload_tlast;
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wire ip_rx_eth_payload_tuser;
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wire ip_tx_eth_hdr_valid;
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wire ip_tx_eth_hdr_ready;
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wire [47:0] ip_tx_eth_dest_mac;
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wire [47:0] ip_tx_eth_src_mac;
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wire [15:0] ip_tx_eth_type;
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wire [63:0] ip_tx_eth_payload_tdata;
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wire [7:0] ip_tx_eth_payload_tkeep;
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wire ip_tx_eth_payload_tvalid;
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wire ip_tx_eth_payload_tready;
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wire ip_tx_eth_payload_tlast;
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wire ip_tx_eth_payload_tuser;
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wire arp_rx_eth_hdr_valid;
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wire arp_rx_eth_hdr_ready;
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wire [47:0] arp_rx_eth_dest_mac;
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wire [47:0] arp_rx_eth_src_mac;
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wire [15:0] arp_rx_eth_type;
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wire [63:0] arp_rx_eth_payload_tdata;
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wire [7:0] arp_rx_eth_payload_tkeep;
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wire arp_rx_eth_payload_tvalid;
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wire arp_rx_eth_payload_tready;
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wire arp_rx_eth_payload_tlast;
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wire arp_rx_eth_payload_tuser;
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wire arp_tx_eth_hdr_valid;
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wire arp_tx_eth_hdr_ready;
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wire [47:0] arp_tx_eth_dest_mac;
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wire [47:0] arp_tx_eth_src_mac;
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wire [15:0] arp_tx_eth_type;
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wire [63:0] arp_tx_eth_payload_tdata;
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wire [7:0] arp_tx_eth_payload_tkeep;
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wire arp_tx_eth_payload_tvalid;
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wire arp_tx_eth_payload_tready;
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wire arp_tx_eth_payload_tlast;
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wire arp_tx_eth_payload_tuser;
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/*
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* Input classifier (eth_type)
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*/
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wire input_select_ip = (input_eth_type == 16'h0800);
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wire input_select_arp = (input_eth_type == 16'h0806);
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wire input_select_none = ~(input_select_ip | input_select_arp);
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reg input_select_ip_reg = 0;
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reg input_select_arp_reg = 0;
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reg input_select_none_reg = 0;
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always @(posedge clk) begin
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if (rst) begin
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input_select_ip_reg <= 0;
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input_select_arp_reg <= 0;
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input_select_none_reg <= 0;
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end else begin
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if (input_eth_payload_tvalid) begin
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if ((~input_select_ip_reg & ~input_select_arp_reg & ~input_select_none_reg) |
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(input_eth_payload_tvalid & input_eth_payload_tready & input_eth_payload_tlast)) begin
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input_select_ip_reg <= input_select_ip;
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input_select_arp_reg <= input_select_arp;
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input_select_none_reg <= input_select_none;
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end
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end else begin
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input_select_ip_reg <= 0;
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input_select_arp_reg <= 0;
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input_select_none_reg <= 0;
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end
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end
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end
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assign ip_rx_eth_hdr_valid = input_select_ip & input_eth_hdr_valid;
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assign ip_rx_eth_dest_mac = input_eth_dest_mac;
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assign ip_rx_eth_src_mac = input_eth_src_mac;
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assign ip_rx_eth_type = 16'h0800;
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assign ip_rx_eth_payload_tdata = input_eth_payload_tdata;
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assign ip_rx_eth_payload_tkeep = input_eth_payload_tkeep;
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assign ip_rx_eth_payload_tvalid = input_select_ip_reg & input_eth_payload_tvalid;
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assign ip_rx_eth_payload_tlast = input_eth_payload_tlast;
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assign ip_rx_eth_payload_tuser = input_eth_payload_tuser;
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assign arp_rx_eth_hdr_valid = input_select_arp & input_eth_hdr_valid;
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assign arp_rx_eth_dest_mac = input_eth_dest_mac;
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assign arp_rx_eth_src_mac = input_eth_src_mac;
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assign arp_rx_eth_type = 16'h0806;
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assign arp_rx_eth_payload_tdata = input_eth_payload_tdata;
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assign arp_rx_eth_payload_tkeep = input_eth_payload_tkeep;
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assign arp_rx_eth_payload_tvalid = input_select_arp_reg & input_eth_payload_tvalid;
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assign arp_rx_eth_payload_tlast = input_eth_payload_tlast;
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assign arp_rx_eth_payload_tuser = input_eth_payload_tuser;
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assign input_eth_hdr_ready = arp_rx_eth_hdr_ready & ip_rx_eth_hdr_ready;
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assign input_eth_payload_tready = (input_select_ip_reg & ip_rx_eth_payload_tready) |
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(input_select_arp_reg & arp_rx_eth_payload_tready) |
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input_select_none_reg;
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/*
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* Output arbiter
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*/
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eth_arb_mux_64_2
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eth_arb_mux_2_inst (
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.clk(clk),
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.rst(rst),
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// Ethernet frame inputs
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// ARP input (highest priority)
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.input_0_eth_hdr_valid(arp_tx_eth_hdr_valid),
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.input_0_eth_hdr_ready(arp_tx_eth_hdr_ready),
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.input_0_eth_dest_mac(arp_tx_eth_dest_mac),
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.input_0_eth_src_mac(arp_tx_eth_src_mac),
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.input_0_eth_type(arp_tx_eth_type),
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.input_0_eth_payload_tdata(arp_tx_eth_payload_tdata),
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.input_0_eth_payload_tkeep(arp_tx_eth_payload_tkeep),
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.input_0_eth_payload_tvalid(arp_tx_eth_payload_tvalid),
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.input_0_eth_payload_tready(arp_tx_eth_payload_tready),
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.input_0_eth_payload_tlast(arp_tx_eth_payload_tlast),
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.input_0_eth_payload_tuser(arp_tx_eth_payload_tuser),
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// IP input (lowest priority)
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.input_1_eth_hdr_valid(ip_tx_eth_hdr_valid),
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.input_1_eth_hdr_ready(ip_tx_eth_hdr_ready),
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.input_1_eth_dest_mac(ip_tx_eth_dest_mac),
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.input_1_eth_src_mac(ip_tx_eth_src_mac),
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.input_1_eth_type(ip_tx_eth_type),
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.input_1_eth_payload_tdata(ip_tx_eth_payload_tdata),
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.input_1_eth_payload_tkeep(ip_tx_eth_payload_tkeep),
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.input_1_eth_payload_tvalid(ip_tx_eth_payload_tvalid),
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.input_1_eth_payload_tready(ip_tx_eth_payload_tready),
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.input_1_eth_payload_tlast(ip_tx_eth_payload_tlast),
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.input_1_eth_payload_tuser(ip_tx_eth_payload_tuser),
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// Ethernet frame output
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.output_eth_hdr_valid(output_eth_hdr_valid),
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.output_eth_hdr_ready(output_eth_hdr_ready),
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.output_eth_dest_mac(output_eth_dest_mac),
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.output_eth_src_mac(output_eth_src_mac),
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.output_eth_type(output_eth_type),
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.output_eth_payload_tdata(output_eth_payload_tdata),
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.output_eth_payload_tkeep(output_eth_payload_tkeep),
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.output_eth_payload_tvalid(output_eth_payload_tvalid),
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.output_eth_payload_tready(output_eth_payload_tready),
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.output_eth_payload_tlast(output_eth_payload_tlast),
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.output_eth_payload_tuser(output_eth_payload_tuser)
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);
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/*
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* IP module
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*/
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ip_64
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ip_inst (
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.clk(clk),
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.rst(rst),
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// Ethernet frame input
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.input_eth_hdr_valid(ip_rx_eth_hdr_valid),
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.input_eth_hdr_ready(ip_rx_eth_hdr_ready),
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.input_eth_dest_mac(ip_rx_eth_dest_mac),
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.input_eth_src_mac(ip_rx_eth_src_mac),
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.input_eth_type(ip_rx_eth_type),
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.input_eth_payload_tdata(ip_rx_eth_payload_tdata),
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.input_eth_payload_tkeep(ip_rx_eth_payload_tkeep),
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.input_eth_payload_tvalid(ip_rx_eth_payload_tvalid),
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.input_eth_payload_tready(ip_rx_eth_payload_tready),
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.input_eth_payload_tlast(ip_rx_eth_payload_tlast),
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.input_eth_payload_tuser(ip_rx_eth_payload_tuser),
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// Ethernet frame output
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.output_eth_hdr_valid(ip_tx_eth_hdr_valid),
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.output_eth_hdr_ready(ip_tx_eth_hdr_ready),
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.output_eth_dest_mac(ip_tx_eth_dest_mac),
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.output_eth_src_mac(ip_tx_eth_src_mac),
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.output_eth_type(ip_tx_eth_type),
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.output_eth_payload_tdata(ip_tx_eth_payload_tdata),
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.output_eth_payload_tkeep(ip_tx_eth_payload_tkeep),
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.output_eth_payload_tvalid(ip_tx_eth_payload_tvalid),
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.output_eth_payload_tready(ip_tx_eth_payload_tready),
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.output_eth_payload_tlast(ip_tx_eth_payload_tlast),
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.output_eth_payload_tuser(ip_tx_eth_payload_tuser),
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// IP frame output
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.output_ip_hdr_valid(output_ip_hdr_valid),
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.output_ip_hdr_ready(output_ip_hdr_ready),
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.output_ip_eth_dest_mac(output_ip_eth_dest_mac),
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.output_ip_eth_src_mac(output_ip_eth_src_mac),
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.output_ip_eth_type(output_ip_eth_type),
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.output_ip_version(output_ip_version),
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.output_ip_ihl(output_ip_ihl),
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.output_ip_dscp(output_ip_dscp),
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.output_ip_ecn(output_ip_ecn),
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.output_ip_length(output_ip_length),
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.output_ip_identification(output_ip_identification),
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.output_ip_flags(output_ip_flags),
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.output_ip_fragment_offset(output_ip_fragment_offset),
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.output_ip_ttl(output_ip_ttl),
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.output_ip_protocol(output_ip_protocol),
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.output_ip_header_checksum(output_ip_header_checksum),
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.output_ip_source_ip(output_ip_source_ip),
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.output_ip_dest_ip(output_ip_dest_ip),
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.output_ip_payload_tdata(output_ip_payload_tdata),
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.output_ip_payload_tkeep(output_ip_payload_tkeep),
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.output_ip_payload_tvalid(output_ip_payload_tvalid),
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.output_ip_payload_tready(output_ip_payload_tready),
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.output_ip_payload_tlast(output_ip_payload_tlast),
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.output_ip_payload_tuser(output_ip_payload_tuser),
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// IP frame input
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.input_ip_hdr_valid(input_ip_hdr_valid),
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.input_ip_hdr_ready(input_ip_hdr_ready),
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.input_ip_dscp(input_ip_dscp),
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.input_ip_ecn(input_ip_ecn),
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.input_ip_length(input_ip_length),
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.input_ip_ttl(input_ip_ttl),
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.input_ip_protocol(input_ip_protocol),
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.input_ip_source_ip(input_ip_source_ip),
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.input_ip_dest_ip(input_ip_dest_ip),
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.input_ip_payload_tdata(input_ip_payload_tdata),
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.input_ip_payload_tkeep(input_ip_payload_tkeep),
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.input_ip_payload_tvalid(input_ip_payload_tvalid),
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.input_ip_payload_tready(input_ip_payload_tready),
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.input_ip_payload_tlast(input_ip_payload_tlast),
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.input_ip_payload_tuser(input_ip_payload_tuser),
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// ARP requests
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.arp_request_valid(arp_request_valid),
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.arp_request_ip(arp_request_ip),
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.arp_response_valid(arp_response_valid),
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.arp_response_error(arp_response_error),
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.arp_response_mac(arp_response_mac),
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// Status
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.rx_busy(rx_busy),
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.tx_busy(tx_busy),
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.rx_error_header_early_termination(rx_error_header_early_termination),
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.rx_error_payload_early_termination(rx_error_payload_early_termination),
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.rx_error_invalid_header(rx_error_invalid_header),
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.rx_error_invalid_checksum(rx_error_invalid_checksum),
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.tx_error_payload_early_termination(tx_error_payload_early_termination),
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.tx_error_arp_failed(tx_error_arp_failed),
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// Configuration
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.local_mac(local_mac),
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.local_ip(local_ip)
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);
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/*
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* ARP module
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*/
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arp_64 #(
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.CACHE_ADDR_WIDTH(ARP_CACHE_ADDR_WIDTH),
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.REQUEST_RETRY_COUNT(ARP_REQUEST_RETRY_COUNT),
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.REQUEST_RETRY_INTERVAL(ARP_REQUEST_RETRY_INTERVAL),
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.REQUEST_TIMEOUT(ARP_REQUEST_TIMEOUT)
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)
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arp_inst (
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.clk(clk),
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.rst(rst),
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// Ethernet frame input
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.input_eth_hdr_valid(arp_rx_eth_hdr_valid),
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.input_eth_hdr_ready(arp_rx_eth_hdr_ready),
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.input_eth_dest_mac(arp_rx_eth_dest_mac),
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.input_eth_src_mac(arp_rx_eth_src_mac),
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.input_eth_type(arp_rx_eth_type),
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|
.input_eth_payload_tdata(arp_rx_eth_payload_tdata),
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.input_eth_payload_tkeep(arp_rx_eth_payload_tkeep),
|
|
.input_eth_payload_tvalid(arp_rx_eth_payload_tvalid),
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|
.input_eth_payload_tready(arp_rx_eth_payload_tready),
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|
.input_eth_payload_tlast(arp_rx_eth_payload_tlast),
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|
.input_eth_payload_tuser(arp_rx_eth_payload_tuser),
|
|
// Ethernet frame output
|
|
.output_eth_hdr_valid(arp_tx_eth_hdr_valid),
|
|
.output_eth_hdr_ready(arp_tx_eth_hdr_ready),
|
|
.output_eth_dest_mac(arp_tx_eth_dest_mac),
|
|
.output_eth_src_mac(arp_tx_eth_src_mac),
|
|
.output_eth_type(arp_tx_eth_type),
|
|
.output_eth_payload_tdata(arp_tx_eth_payload_tdata),
|
|
.output_eth_payload_tkeep(arp_tx_eth_payload_tkeep),
|
|
.output_eth_payload_tvalid(arp_tx_eth_payload_tvalid),
|
|
.output_eth_payload_tready(arp_tx_eth_payload_tready),
|
|
.output_eth_payload_tlast(arp_tx_eth_payload_tlast),
|
|
.output_eth_payload_tuser(arp_tx_eth_payload_tuser),
|
|
// ARP requests
|
|
.arp_request_valid(arp_request_valid),
|
|
.arp_request_ip(arp_request_ip),
|
|
.arp_response_valid(arp_response_valid),
|
|
.arp_response_error(arp_response_error),
|
|
.arp_response_mac(arp_response_mac),
|
|
// Configuration
|
|
.local_mac(local_mac),
|
|
.local_ip(local_ip),
|
|
.gateway_ip(gateway_ip),
|
|
.subnet_mask(subnet_mask),
|
|
.clear_cache(clear_arp_cache)
|
|
);
|
|
|
|
endmodule
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