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Add IP modules (8 bit datapath)

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Alex Forencich 2014-09-19 17:35:51 -07:00
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rtl/ip_eth_rx.v Normal file
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/*
Copyright (c) 2014 Alex Forencich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
// Language: Verilog 2001
`timescale 1ns / 1ps
/*
* IP ethernet frame receiver (Ethernet frame in, IP frame out)
*/
module ip_eth_rx
(
input wire clk,
input wire rst,
/*
* Ethernet frame input
*/
input wire input_eth_hdr_valid,
output wire input_eth_hdr_ready,
input wire [47:0] input_eth_dest_mac,
input wire [47:0] input_eth_src_mac,
input wire [15:0] input_eth_type,
input wire [7:0] input_eth_payload_tdata,
input wire input_eth_payload_tvalid,
output wire input_eth_payload_tready,
input wire input_eth_payload_tlast,
input wire input_eth_payload_tuser,
/*
* IP frame output
*/
output wire output_ip_hdr_valid,
input wire output_ip_hdr_ready,
output wire [47:0] output_eth_dest_mac,
output wire [47:0] output_eth_src_mac,
output wire [15:0] output_eth_type,
output wire [3:0] output_ip_version,
output wire [3:0] output_ip_ihl,
output wire [5:0] output_ip_dscp,
output wire [1:0] output_ip_ecn,
output wire [15:0] output_ip_length,
output wire [15:0] output_ip_identification,
output wire [2:0] output_ip_flags,
output wire [12:0] output_ip_fragment_offset,
output wire [7:0] output_ip_ttl,
output wire [7:0] output_ip_protocol,
output wire [15:0] output_ip_header_checksum,
output wire [31:0] output_ip_source_ip,
output wire [31:0] output_ip_dest_ip,
output wire [7:0] output_ip_payload_tdata,
output wire output_ip_payload_tvalid,
input wire output_ip_payload_tready,
output wire output_ip_payload_tlast,
output wire output_ip_payload_tuser,
/*
* Status signals
*/
output wire busy,
output wire error_header_early_termination,
output wire error_payload_early_termination,
output wire error_invalid_header,
output wire error_invalid_checksum
);
/*
IP Frame
Field Length
Destination MAC address 6 octets
Source MAC address 6 octets
Ethertype (0x0800) 2 octets
Version (4) 4 bits
IHL (5-15) 4 bits
DSCP (0) 6 bits
ECN (0) 2 bits
length 2 octets
identification (0?) 2 octets
flags (010) 3 bits
fragment offset (0) 13 bits
time to live (64?) 1 octet
protocol 1 octet
header checksum 2 octets
source IP 4 octets
destination IP 4 octets
options (IHL-5)*4 octets
payload length octets
This module receives an Ethernet frame with decoded fields and decodes
the AXI packet format. If the Ethertype does not match, the packet is
discarded.
*/
localparam [2:0]
STATE_IDLE = 3'd0,
STATE_READ_HEADER = 3'd1,
STATE_READ_PAYLOAD_IDLE = 3'd2,
STATE_READ_PAYLOAD_TRANSFER = 3'd3,
STATE_READ_PAYLOAD_TRANSFER_WAIT = 3'd4,
STATE_READ_PAYLOAD_TRANSFER_LAST = 3'd5,
STATE_READ_PAYLOAD_TRANSFER_WAIT_LAST = 3'd6,
STATE_WAIT_LAST = 3'd7;
reg [2:0] state_reg = STATE_IDLE, state_next;
// datapath control signals
reg store_eth_hdr;
reg store_ip_version_ihl;
reg store_ip_dscp_ecn;
reg store_ip_length_0;
reg store_ip_length_1;
reg store_ip_identification_0;
reg store_ip_identification_1;
reg store_ip_flags_fragment_offset_0;
reg store_ip_flags_fragment_offset_1;
reg store_ip_ttl;
reg store_ip_protocol;
reg store_ip_header_checksum_0;
reg store_ip_header_checksum_1;
reg store_ip_source_ip_0;
reg store_ip_source_ip_1;
reg store_ip_source_ip_2;
reg store_ip_source_ip_3;
reg store_ip_dest_ip_0;
reg store_ip_dest_ip_1;
reg store_ip_dest_ip_2;
reg store_ip_dest_ip_3;
reg transfer_in_out;
reg transfer_in_temp;
reg transfer_temp_out;
reg assert_tlast;
reg assert_tuser;
reg [15:0] frame_ptr_reg = 0, frame_ptr_next;
reg [15:0] hdr_sum_reg = 0, hdr_sum_next;
reg input_eth_hdr_ready_reg = 0;
reg input_eth_payload_tready_reg = 0;
reg output_ip_hdr_valid_reg = 0, output_ip_hdr_valid_next;
reg [47:0] output_eth_dest_mac_reg = 0;
reg [47:0] output_eth_src_mac_reg = 0;
reg [15:0] output_eth_type_reg = 0;
reg [3:0] output_ip_version_reg = 0;
reg [3:0] output_ip_ihl_reg = 0;
reg [5:0] output_ip_dscp_reg = 0;
reg [1:0] output_ip_ecn_reg = 0;
reg [15:0] output_ip_length_reg = 0;
reg [15:0] output_ip_identification_reg = 0;
reg [2:0] output_ip_flags_reg = 0;
reg [12:0] output_ip_fragment_offset_reg = 0;
reg [7:0] output_ip_ttl_reg = 0;
reg [7:0] output_ip_protocol_reg = 0;
reg [15:0] output_ip_header_checksum_reg = 0;
reg [31:0] output_ip_source_ip_reg = 0;
reg [31:0] output_ip_dest_ip_reg = 0;
reg [7:0] output_ip_payload_tdata_reg = 0;
reg output_ip_payload_tvalid_reg = 0;
reg output_ip_payload_tlast_reg = 0;
reg output_ip_payload_tuser_reg = 0;
reg busy_reg = 0;
reg error_header_early_termination_reg = 0, error_header_early_termination_next;
reg error_payload_early_termination_reg = 0, error_payload_early_termination_next;
reg error_invalid_header_reg = 0, error_invalid_header_next;
reg error_invalid_checksum_reg = 0, error_invalid_checksum_next;
reg [7:0] temp_ip_payload_tdata_reg = 0;
reg temp_ip_payload_tlast_reg = 0;
reg temp_ip_payload_tuser_reg = 0;
assign input_eth_hdr_ready = input_eth_hdr_ready_reg;
assign input_eth_payload_tready = input_eth_payload_tready_reg;
assign output_eth_dest_mac = output_eth_dest_mac_reg;
assign output_eth_src_mac = output_eth_src_mac_reg;
assign output_eth_type = output_eth_type_reg;
assign output_ip_hdr_valid = output_ip_hdr_valid_reg;
assign output_ip_version = output_ip_version_reg;
assign output_ip_ihl = output_ip_ihl_reg;
assign output_ip_dscp = output_ip_dscp_reg;
assign output_ip_ecn = output_ip_ecn_reg;
assign output_ip_length = output_ip_length_reg;
assign output_ip_identification = output_ip_identification_reg;
assign output_ip_flags = output_ip_flags_reg;
assign output_ip_fragment_offset = output_ip_fragment_offset_reg;
assign output_ip_ttl = output_ip_ttl_reg;
assign output_ip_protocol = output_ip_protocol_reg;
assign output_ip_header_checksum = output_ip_header_checksum_reg;
assign output_ip_source_ip = output_ip_source_ip_reg;
assign output_ip_dest_ip = output_ip_dest_ip_reg;
assign output_ip_payload_tdata = output_ip_payload_tdata_reg;
assign output_ip_payload_tvalid = output_ip_payload_tvalid_reg;
assign output_ip_payload_tlast = output_ip_payload_tlast_reg;
assign output_ip_payload_tuser = output_ip_payload_tuser_reg;
assign busy = busy_reg;
assign error_header_early_termination = error_header_early_termination_reg;
assign error_payload_early_termination = error_payload_early_termination_reg;
assign error_invalid_header = error_invalid_header_reg;
assign error_invalid_checksum = error_invalid_checksum_reg;
function [15:0] add1c16b;
parameter WIDTH = 16;
input [15:0] a, b;
reg [16:0] t;
begin
t = a+b;
add1c16b = t[15:0] + t[16];
end
endfunction
always @* begin
state_next = 2'bz;
transfer_in_out = 0;
transfer_in_temp = 0;
transfer_temp_out = 0;
assert_tlast = 0;
assert_tuser = 0;
store_eth_hdr = 0;
store_ip_version_ihl = 0;
store_ip_dscp_ecn = 0;
store_ip_length_0 = 0;
store_ip_length_1 = 0;
store_ip_identification_0 = 0;
store_ip_identification_1 = 0;
store_ip_flags_fragment_offset_0 = 0;
store_ip_flags_fragment_offset_1 = 0;
store_ip_ttl = 0;
store_ip_protocol = 0;
store_ip_header_checksum_0 = 0;
store_ip_header_checksum_1 = 0;
store_ip_source_ip_0 = 0;
store_ip_source_ip_1 = 0;
store_ip_source_ip_2 = 0;
store_ip_source_ip_3 = 0;
store_ip_dest_ip_0 = 0;
store_ip_dest_ip_1 = 0;
store_ip_dest_ip_2 = 0;
store_ip_dest_ip_3 = 0;
frame_ptr_next = frame_ptr_reg;
hdr_sum_next = hdr_sum_reg;
output_ip_hdr_valid_next = output_ip_hdr_valid_reg & ~output_ip_hdr_ready;
error_header_early_termination_next = 0;
error_payload_early_termination_next = 0;
error_invalid_header_next = 0;
error_invalid_checksum_next = 0;
case (state_reg)
STATE_IDLE: begin
// idle state - wait for header
frame_ptr_next = 0;
hdr_sum_next = 0;
if (input_eth_hdr_ready & input_eth_hdr_valid) begin
frame_ptr_next = 0;
store_eth_hdr = 1;
state_next = STATE_READ_HEADER;
end else begin
state_next = STATE_IDLE;
end
end
STATE_READ_HEADER: begin
// read header state
if (input_eth_payload_tvalid) begin
// word transfer in - store it
frame_ptr_next = frame_ptr_reg+1;
state_next = STATE_READ_HEADER;
if (frame_ptr_reg[0]) begin
hdr_sum_next = add1c16b(hdr_sum_reg, {8'd0, input_eth_payload_tdata});
end else begin
hdr_sum_next = add1c16b(hdr_sum_reg, {input_eth_payload_tdata, 8'd0});
end
case (frame_ptr_reg)
8'h00: store_ip_version_ihl = 1;
8'h01: store_ip_dscp_ecn = 1;
8'h02: store_ip_length_1 = 1;
8'h03: store_ip_length_0 = 1;
8'h04: store_ip_identification_1 = 1;
8'h05: store_ip_identification_0 = 1;
8'h06: store_ip_flags_fragment_offset_1 = 1;
8'h07: store_ip_flags_fragment_offset_0 = 1;
8'h08: store_ip_ttl = 1;
8'h09: store_ip_protocol = 1;
8'h0A: store_ip_header_checksum_1 = 1;
8'h0B: store_ip_header_checksum_0 = 1;
8'h0C: store_ip_source_ip_3 = 1;
8'h0D: store_ip_source_ip_2 = 1;
8'h0E: store_ip_source_ip_1 = 1;
8'h0F: store_ip_source_ip_0 = 1;
8'h10: store_ip_dest_ip_3 = 1;
8'h11: store_ip_dest_ip_2 = 1;
8'h12: store_ip_dest_ip_1 = 1;
8'h13: begin
store_ip_dest_ip_0 = 1;
if (output_ip_version_reg != 4 || output_ip_ihl_reg != 5) begin
error_invalid_header_next = 1;
state_next = STATE_WAIT_LAST;
end else if (hdr_sum_next != 16'hffff) begin
error_invalid_checksum_next = 1;
state_next = STATE_WAIT_LAST;
end else begin
output_ip_hdr_valid_next = 1;
state_next = STATE_READ_PAYLOAD_IDLE;
end
end
endcase
if (input_eth_payload_tlast) begin
state_next = STATE_IDLE;
error_header_early_termination_next = 1;
end
end else begin
state_next = STATE_READ_HEADER;
end
end
STATE_READ_PAYLOAD_IDLE: begin
// idle; no data in registers
if (input_eth_payload_tvalid) begin
// word transfer in - store it in output register
transfer_in_out = 1;
frame_ptr_next = frame_ptr_reg+1;
if (input_eth_payload_tlast) begin
if (frame_ptr_next != output_ip_length_reg) begin
// end of frame, but length does not match
assert_tuser = 1;
error_payload_early_termination_next = 1;
end
state_next = STATE_READ_PAYLOAD_TRANSFER_LAST;
end else begin
if (frame_ptr_next == output_ip_length_reg) begin
// not end of frame, but we have the entire payload
state_next = STATE_READ_PAYLOAD_TRANSFER_WAIT_LAST;
end else begin
state_next = STATE_READ_PAYLOAD_TRANSFER;
end
end
end else begin
state_next = STATE_READ_PAYLOAD_IDLE;
end
end
STATE_READ_PAYLOAD_TRANSFER: begin
// read payload; data in output register
if (input_eth_payload_tvalid & output_ip_payload_tready) begin
// word transfer through - update output register
transfer_in_out = 1;
frame_ptr_next = frame_ptr_reg+1;
if (input_eth_payload_tlast) begin
if (frame_ptr_next != output_ip_length_reg) begin
// end of frame, but length does not match
assert_tuser = 1;
error_payload_early_termination_next = 1;
end
state_next = STATE_READ_PAYLOAD_TRANSFER_LAST;
end else begin
if (frame_ptr_next == output_ip_length_reg) begin
// not end of frame, but we have the entire payload
state_next = STATE_READ_PAYLOAD_TRANSFER_WAIT_LAST;
end else begin
state_next = STATE_READ_PAYLOAD_TRANSFER;
end
end
end else if (~input_eth_payload_tvalid & output_ip_payload_tready) begin
// word transfer out - go back to idle
state_next = STATE_READ_PAYLOAD_IDLE;
end else if (input_eth_payload_tvalid & ~output_ip_payload_tready) begin
// word transfer in - store in temp
transfer_in_temp = 1;
frame_ptr_next = frame_ptr_reg+1;
state_next = STATE_READ_PAYLOAD_TRANSFER_WAIT;
end else begin
state_next = STATE_READ_PAYLOAD_TRANSFER;
end
end
STATE_READ_PAYLOAD_TRANSFER_WAIT: begin
// read payload; data in both output and temp registers
if (output_ip_payload_tready) begin
// transfer out - move temp to output
transfer_temp_out = 1;
if (temp_ip_payload_tlast_reg) begin
if (frame_ptr_next != output_ip_length_reg) begin
// end of frame, but length does not match
assert_tuser = 1;
error_payload_early_termination_next = 1;
end
state_next = STATE_READ_PAYLOAD_TRANSFER_LAST;
end else begin
if (frame_ptr_next == output_ip_length_reg) begin
// not end of frame, but we have the entire payload
state_next = STATE_READ_PAYLOAD_TRANSFER_WAIT_LAST;
end else begin
state_next = STATE_READ_PAYLOAD_TRANSFER;
end
end
end else begin
state_next = STATE_READ_PAYLOAD_TRANSFER_WAIT;
end
end
STATE_READ_PAYLOAD_TRANSFER_LAST: begin
// read last payload word; data in output register; do not accept new data
if (output_ip_payload_tready) begin
// word transfer out - done
state_next = STATE_IDLE;
end else begin
state_next = STATE_READ_PAYLOAD_TRANSFER_LAST;
end
end
STATE_READ_PAYLOAD_TRANSFER_WAIT_LAST: begin
// wait for end of frame; data in output register; read and discard
if (input_eth_payload_tvalid) begin
if (input_eth_payload_tlast) begin
// assert tlast and transfer tuser
assert_tlast = 1;
assert_tuser = input_eth_payload_tuser;
state_next = STATE_READ_PAYLOAD_TRANSFER_LAST;
end else begin
state_next = STATE_READ_PAYLOAD_TRANSFER_WAIT_LAST;
end
end else begin
state_next = STATE_READ_PAYLOAD_TRANSFER_WAIT_LAST;
end
end
STATE_WAIT_LAST: begin
// wait for end of frame; read and discard
if (input_eth_payload_tvalid) begin
if (input_eth_payload_tlast) begin
state_next = STATE_IDLE;
end else begin
state_next = STATE_WAIT_LAST;
end
end else begin
state_next = STATE_WAIT_LAST;
end
end
endcase
end
always @(posedge clk or posedge rst) begin
if (rst) begin
state_reg <= STATE_IDLE;
frame_ptr_reg <= 0;
hdr_sum_reg <= 0;
input_eth_hdr_ready_reg <= 0;
input_eth_payload_tready_reg <= 0;
output_ip_hdr_valid_reg <= 0;
output_eth_dest_mac_reg <= 0;
output_eth_src_mac_reg <= 0;
output_eth_type_reg <= 0;
output_ip_version_reg <= 0;
output_ip_ihl_reg <= 0;
output_ip_dscp_reg <= 0;
output_ip_ecn_reg <= 0;
output_ip_length_reg <= 0;
output_ip_identification_reg <= 0;
output_ip_flags_reg <= 0;
output_ip_fragment_offset_reg <= 0;
output_ip_ttl_reg <= 0;
output_ip_protocol_reg <= 0;
output_ip_header_checksum_reg <= 0;
output_ip_source_ip_reg <= 0;
output_ip_dest_ip_reg <= 0;
output_ip_payload_tdata_reg <= 0;
output_ip_payload_tvalid_reg <= 0;
output_ip_payload_tlast_reg <= 0;
output_ip_payload_tuser_reg <= 0;
temp_ip_payload_tdata_reg <= 0;
temp_ip_payload_tlast_reg <= 0;
temp_ip_payload_tuser_reg <= 0;
busy_reg <= 0;
error_header_early_termination_reg <= 0;
error_payload_early_termination_reg <= 0;
error_invalid_header_reg <= 0;
error_invalid_checksum_reg <= 0;
end else begin
state_reg <= state_next;
frame_ptr_reg <= frame_ptr_next;
hdr_sum_reg <= hdr_sum_next;
output_ip_hdr_valid_reg <= output_ip_hdr_valid_next;
error_header_early_termination_reg <= error_header_early_termination_next;
error_payload_early_termination_reg <= error_payload_early_termination_next;
error_invalid_header_reg <= error_invalid_header_next;
error_invalid_checksum_reg <= error_invalid_checksum_next;
busy_reg <= state_next != STATE_IDLE;
// generate valid outputs
case (state_next)
STATE_IDLE: begin
// idle; accept new data
input_eth_hdr_ready_reg <= ~output_ip_hdr_valid;
input_eth_payload_tready_reg <= 0;
output_ip_payload_tvalid_reg <= 0;
end
STATE_READ_HEADER: begin
// read header; accept new data
input_eth_hdr_ready_reg <= 0;
input_eth_payload_tready_reg <= 1;
output_ip_payload_tvalid_reg <= 0;
end
STATE_READ_PAYLOAD_IDLE: begin
// read payload; no data in registers; accept new data
input_eth_hdr_ready_reg <= 0;
input_eth_payload_tready_reg <= 1;
output_ip_payload_tvalid_reg <= 0;
end
STATE_READ_PAYLOAD_TRANSFER: begin
// read payload; data in output register; accept new data
input_eth_hdr_ready_reg <= 0;
input_eth_payload_tready_reg <= 1;
output_ip_payload_tvalid_reg <= 1;
end
STATE_READ_PAYLOAD_TRANSFER_WAIT: begin
// read payload; data in output and temp registers; do not accept new data
input_eth_hdr_ready_reg <= 0;
input_eth_payload_tready_reg <= 0;
output_ip_payload_tvalid_reg <= 1;
end
STATE_READ_PAYLOAD_TRANSFER_LAST: begin
// read last payload word; data in output register; do not accept new data
input_eth_hdr_ready_reg <= 0;
input_eth_payload_tready_reg <= 0;
output_ip_payload_tvalid_reg <= 1;
end
STATE_READ_PAYLOAD_TRANSFER_WAIT_LAST: begin
// wait for end of frame; data in output register; read and discard
input_eth_hdr_ready_reg <= 0;
input_eth_payload_tready_reg <= 1;
output_ip_payload_tvalid_reg <= 0;
end
STATE_WAIT_LAST: begin
// wait for end of frame; read and discard
input_eth_hdr_ready_reg <= 0;
input_eth_payload_tready_reg <= 1;
output_ip_payload_tvalid_reg <= 0;
end
endcase
// datapath
if (store_eth_hdr) begin
output_eth_dest_mac_reg <= input_eth_dest_mac;
output_eth_src_mac_reg <= input_eth_src_mac;
output_eth_type_reg <= input_eth_type;
end
if (store_ip_version_ihl) {output_ip_version_reg, output_ip_ihl_reg} <= input_eth_payload_tdata;
if (store_ip_dscp_ecn) {output_ip_dscp_reg, output_ip_ecn_reg} <= input_eth_payload_tdata;
if (store_ip_length_0) output_ip_length_reg[ 7: 0] <= input_eth_payload_tdata;
if (store_ip_length_1) output_ip_length_reg[15: 8] <= input_eth_payload_tdata;
if (store_ip_identification_0) output_ip_identification_reg[ 7: 0] <= input_eth_payload_tdata;
if (store_ip_identification_1) output_ip_identification_reg[15: 8] <= input_eth_payload_tdata;
if (store_ip_flags_fragment_offset_0) output_ip_fragment_offset_reg[ 7:0] <= input_eth_payload_tdata;
if (store_ip_flags_fragment_offset_1) {output_ip_flags_reg, output_ip_fragment_offset_reg[12:8]} <= input_eth_payload_tdata;
if (store_ip_ttl) output_ip_ttl_reg <= input_eth_payload_tdata;
if (store_ip_protocol) output_ip_protocol_reg <= input_eth_payload_tdata;
if (store_ip_header_checksum_0) output_ip_header_checksum_reg[ 7: 0] <= input_eth_payload_tdata;
if (store_ip_header_checksum_1) output_ip_header_checksum_reg[15: 8] <= input_eth_payload_tdata;
if (store_ip_source_ip_0) output_ip_source_ip_reg[ 7: 0] <= input_eth_payload_tdata;
if (store_ip_source_ip_1) output_ip_source_ip_reg[15: 8] <= input_eth_payload_tdata;
if (store_ip_source_ip_2) output_ip_source_ip_reg[23:16] <= input_eth_payload_tdata;
if (store_ip_source_ip_3) output_ip_source_ip_reg[31:24] <= input_eth_payload_tdata;
if (store_ip_dest_ip_0) output_ip_dest_ip_reg[ 7: 0] <= input_eth_payload_tdata;
if (store_ip_dest_ip_1) output_ip_dest_ip_reg[15: 8] <= input_eth_payload_tdata;
if (store_ip_dest_ip_2) output_ip_dest_ip_reg[23:16] <= input_eth_payload_tdata;
if (store_ip_dest_ip_3) output_ip_dest_ip_reg[31:24] <= input_eth_payload_tdata;
if (transfer_in_out) begin
output_ip_payload_tdata_reg <= input_eth_payload_tdata;
output_ip_payload_tlast_reg <= input_eth_payload_tlast;
output_ip_payload_tuser_reg <= input_eth_payload_tuser;
end else if (transfer_in_temp) begin
temp_ip_payload_tdata_reg <= input_eth_payload_tdata;
temp_ip_payload_tlast_reg <= input_eth_payload_tlast;
temp_ip_payload_tuser_reg <= input_eth_payload_tuser;
end else if (transfer_temp_out) begin
output_ip_payload_tdata_reg <= temp_ip_payload_tdata_reg;
output_ip_payload_tlast_reg <= temp_ip_payload_tlast_reg;
output_ip_payload_tuser_reg <= temp_ip_payload_tuser_reg;
end
if (assert_tlast) output_ip_payload_tlast_reg <= 1;
if (assert_tuser) output_ip_payload_tuser_reg <= 1;
end
end
endmodule

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/*
Copyright (c) 2014 Alex Forencich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
// Language: Verilog 2001
`timescale 1ns / 1ps
/*
* IP ethernet frame transmitter (IP frame in, Ethernet frame out)
*/
module ip_eth_tx
(
input wire clk,
input wire rst,
/*
* IP frame input
*/
input wire input_ip_hdr_valid,
output wire input_ip_hdr_ready,
input wire [47:0] input_eth_dest_mac,
input wire [47:0] input_eth_src_mac,
input wire [15:0] input_eth_type,
input wire [5:0] input_ip_dscp,
input wire [1:0] input_ip_ecn,
input wire [15:0] input_ip_length,
input wire [15:0] input_ip_identification,
input wire [2:0] input_ip_flags,
input wire [12:0] input_ip_fragment_offset,
input wire [7:0] input_ip_ttl,
input wire [7:0] input_ip_protocol,
input wire [31:0] input_ip_source_ip,
input wire [31:0] input_ip_dest_ip,
input wire [7:0] input_ip_payload_tdata,
input wire input_ip_payload_tvalid,
output wire input_ip_payload_tready,
input wire input_ip_payload_tlast,
input wire input_ip_payload_tuser,
/*
* Ethernet frame output
*/
output wire output_eth_hdr_valid,
input wire output_eth_hdr_ready,
output wire [47:0] output_eth_dest_mac,
output wire [47:0] output_eth_src_mac,
output wire [15:0] output_eth_type,
output wire [7:0] output_eth_payload_tdata,
output wire output_eth_payload_tvalid,
input wire output_eth_payload_tready,
output wire output_eth_payload_tlast,
output wire output_eth_payload_tuser,
/*
* Status signals
*/
output wire busy,
output wire error_payload_early_termination
);
/*
IP Frame
Field Length
Destination MAC address 6 octets
Source MAC address 6 octets
Ethertype (0x0800) 2 octets
Version (4) 4 bits
IHL (5-15) 4 bits
DSCP (0) 6 bits
ECN (0) 2 bits
length 2 octets
identification (0?) 2 octets
flags (010) 3 bits
fragment offset (0) 13 bits
time to live (64?) 1 octet
protocol 1 octet
header checksum 2 octets
source IP 4 octets
destination IP 4 octets
options (IHL-5)*4 octets
payload length octets
This module receives an Ethernet frame with decoded fields and decodes
the AXI packet format. If the Ethertype does not match, the packet is
discarded.
*/
localparam [2:0]
STATE_IDLE = 3'd0,
STATE_WRITE_HEADER = 3'd1,
STATE_WRITE_PAYLOAD_IDLE = 3'd2,
STATE_WRITE_PAYLOAD_TRANSFER = 3'd3,
STATE_WRITE_PAYLOAD_TRANSFER_WAIT = 3'd4,
STATE_WRITE_PAYLOAD_TRANSFER_LAST = 3'd5,
STATE_WRITE_PAYLOAD_TRANSFER_WAIT_LAST = 3'd6,
STATE_WAIT_LAST = 3'd7;
reg [2:0] state_reg = STATE_IDLE, state_next;
// datapath control signals
reg store_ip_hdr;
reg [7:0] write_hdr_data;
reg write_hdr_out;
reg transfer_in_out;
reg transfer_in_temp;
reg transfer_temp_out;
reg assert_tlast;
reg assert_tuser;
reg [15:0] frame_ptr_reg = 0, frame_ptr_next;
reg [15:0] hdr_sum_reg = 0, hdr_sum_next;
reg [15:0] payload_len_reg = 0, payload_len_next;
reg [5:0] ip_dscp_reg = 0;
reg [1:0] ip_ecn_reg = 0;
reg [15:0] ip_length_reg = 0;
reg [15:0] ip_identification_reg = 0;
reg [2:0] ip_flags_reg = 0;
reg [12:0] ip_fragment_offset_reg = 0;
reg [7:0] ip_ttl_reg = 0;
reg [7:0] ip_protocol_reg = 0;
reg [31:0] ip_source_ip_reg = 0;
reg [31:0] ip_dest_ip_reg = 0;
reg input_ip_hdr_ready_reg = 0;
reg input_ip_payload_tready_reg = 0;
reg output_eth_hdr_valid_reg = 0, output_eth_hdr_valid_next;
reg [47:0] output_eth_dest_mac_reg = 0;
reg [47:0] output_eth_src_mac_reg = 0;
reg [15:0] output_eth_type_reg = 0;
reg [7:0] output_eth_payload_tdata_reg = 0;
reg output_eth_payload_tvalid_reg = 0;
reg output_eth_payload_tlast_reg = 0;
reg output_eth_payload_tuser_reg = 0;
reg busy_reg = 0;
reg error_payload_early_termination_reg = 0, error_payload_early_termination_next;
reg [7:0] temp_eth_payload_tdata_reg = 0;
reg temp_eth_payload_tlast_reg = 0;
reg temp_eth_payload_tuser_reg = 0;
assign input_ip_hdr_ready = input_ip_hdr_ready_reg;
assign input_ip_payload_tready = input_ip_payload_tready_reg;
assign output_eth_hdr_valid = output_eth_hdr_valid_reg;
assign output_eth_dest_mac = output_eth_dest_mac_reg;
assign output_eth_src_mac = output_eth_src_mac_reg;
assign output_eth_type = output_eth_type_reg;
assign output_eth_payload_tdata = output_eth_payload_tdata_reg;
assign output_eth_payload_tvalid = output_eth_payload_tvalid_reg;
assign output_eth_payload_tlast = output_eth_payload_tlast_reg;
assign output_eth_payload_tuser = output_eth_payload_tuser_reg;
assign busy = busy_reg;
assign error_payload_early_termination = error_payload_early_termination_reg;
function [15:0] add1c16b;
parameter WIDTH = 16;
input [15:0] a, b;
reg [16:0] t;
begin
t = a+b;
add1c16b = t[15:0] + t[16];
end
endfunction
always @* begin
state_next = 2'bz;
store_ip_hdr = 0;
write_hdr_data = 0;
write_hdr_out = 0;
transfer_in_out = 0;
transfer_in_temp = 0;
transfer_temp_out = 0;
assert_tlast = 0;
assert_tuser = 0;
frame_ptr_next = frame_ptr_reg;
hdr_sum_next = hdr_sum_reg;
payload_len_next = payload_len_reg;
output_eth_hdr_valid_next = output_eth_hdr_valid_reg & ~output_eth_hdr_ready;
error_payload_early_termination_next = 0;
case (state_reg)
STATE_IDLE: begin
// idle state - wait for data
frame_ptr_next = 0;
if (input_ip_hdr_valid & input_ip_hdr_ready) begin
store_ip_hdr = 1;
write_hdr_out = 1;
write_hdr_data = {4'd4, 4'd5}; // ip_version, ip_ihl
output_eth_hdr_valid_next = 1;
frame_ptr_next = 1;
state_next = STATE_WRITE_HEADER;
end else begin
state_next = STATE_IDLE;
end
end
STATE_WRITE_HEADER: begin
// read header state
if (output_eth_payload_tready) begin
// word transfer out
frame_ptr_next = frame_ptr_reg+1;
state_next = STATE_WRITE_HEADER;
write_hdr_out = 1;
case (frame_ptr_reg)
8'h01: begin
write_hdr_data = {ip_dscp_reg, ip_ecn_reg};
hdr_sum_next = {4'd4, 4'd5, ip_dscp_reg, ip_ecn_reg};
end
8'h02: begin
write_hdr_data = ip_length_reg[15: 8];
hdr_sum_next = add1c16b(hdr_sum_reg, ip_length_reg);
end
8'h03: begin
write_hdr_data = ip_length_reg[ 7: 0];
hdr_sum_next = add1c16b(hdr_sum_reg, ip_identification_reg);
end
8'h04: begin
write_hdr_data = ip_identification_reg[15: 8];
hdr_sum_next = add1c16b(hdr_sum_reg, {ip_flags_reg, ip_fragment_offset_reg});
end
8'h05: begin
write_hdr_data = ip_identification_reg[ 7: 0];
hdr_sum_next = add1c16b(hdr_sum_reg, {ip_ttl_reg, ip_protocol_reg});
end
8'h06: begin
write_hdr_data = {ip_flags_reg, ip_fragment_offset_reg[12:8]};
hdr_sum_next = add1c16b(hdr_sum_reg, ip_source_ip_reg[31:16]);
end
8'h07: begin
write_hdr_data = ip_fragment_offset_reg[ 7: 0];
hdr_sum_next = add1c16b(hdr_sum_reg, ip_source_ip_reg[15:0]);
end
8'h08: begin
write_hdr_data = ip_ttl_reg;
hdr_sum_next = add1c16b(hdr_sum_reg, ip_dest_ip_reg[31:16]);
end
8'h09: begin
write_hdr_data = ip_protocol_reg;
hdr_sum_next = add1c16b(hdr_sum_reg, ip_dest_ip_reg[15:0]);
end
8'h0A: write_hdr_data = ~hdr_sum_reg[15: 8];
8'h0B: write_hdr_data = ~hdr_sum_reg[ 7: 0];
8'h0C: write_hdr_data = ip_source_ip_reg[31:24];
8'h0D: write_hdr_data = ip_source_ip_reg[23:16];
8'h0E: write_hdr_data = ip_source_ip_reg[15: 8];
8'h0F: write_hdr_data = ip_source_ip_reg[ 7: 0];
8'h10: write_hdr_data = ip_dest_ip_reg[31:24];
8'h11: write_hdr_data = ip_dest_ip_reg[23:16];
8'h12: write_hdr_data = ip_dest_ip_reg[15: 8];
8'h13: begin
write_hdr_data = ip_dest_ip_reg[ 7: 0];
state_next = STATE_WRITE_PAYLOAD_TRANSFER;
end
endcase
end else begin
state_next = STATE_WRITE_HEADER;
end
end
STATE_WRITE_PAYLOAD_IDLE: begin
// idle; no data in registers
if (input_ip_payload_tvalid) begin
// word transfer in - store it in output register
transfer_in_out = 1;
frame_ptr_next = frame_ptr_reg+1;
if (input_ip_payload_tlast) begin
if (frame_ptr_next != ip_length_reg) begin
// end of frame, but length does not match
assert_tuser = 1;
error_payload_early_termination_next = 1;
end
state_next = STATE_WRITE_PAYLOAD_TRANSFER_LAST;
end else begin
if (frame_ptr_next == ip_length_reg) begin
// not end of frame, but we have the entire payload
state_next = STATE_WRITE_PAYLOAD_TRANSFER_WAIT_LAST;
end else begin
state_next = STATE_WRITE_PAYLOAD_TRANSFER;
end
end
end else begin
state_next = STATE_WRITE_PAYLOAD_IDLE;
end
end
STATE_WRITE_PAYLOAD_TRANSFER: begin
// write payload; data in output register
if (input_ip_payload_tvalid & output_eth_payload_tready) begin
// word transfer through - update output register
transfer_in_out = 1;
frame_ptr_next = frame_ptr_reg+1;
if (input_ip_payload_tlast) begin
if (frame_ptr_next != ip_length_reg) begin
// end of frame, but length does not match
assert_tuser = 1;
error_payload_early_termination_next = 1;
end
state_next = STATE_WRITE_PAYLOAD_TRANSFER_LAST;
end else begin
if (frame_ptr_next == ip_length_reg) begin
// not end of frame, but we have the entire payload
state_next = STATE_WRITE_PAYLOAD_TRANSFER_WAIT_LAST;
end else begin
state_next = STATE_WRITE_PAYLOAD_TRANSFER;
end
end
end else if (~input_ip_payload_tvalid & output_eth_payload_tready) begin
// word transfer out - go back to idle
state_next = STATE_WRITE_PAYLOAD_IDLE;
end else if (input_ip_payload_tvalid & ~output_eth_payload_tready) begin
// word transfer in - store in temp
transfer_in_temp = 1;
frame_ptr_next = frame_ptr_reg+1;
state_next = STATE_WRITE_PAYLOAD_TRANSFER_WAIT;
end else begin
state_next = STATE_WRITE_PAYLOAD_TRANSFER;
end
end
STATE_WRITE_PAYLOAD_TRANSFER_WAIT: begin
// write payload; data in both output and temp registers
if (output_eth_payload_tready) begin
// transfer out - move temp to output
transfer_temp_out = 1;
if (temp_eth_payload_tlast_reg) begin
if (frame_ptr_next != ip_length_reg) begin
// end of frame, but length does not match
assert_tuser = 1;
error_payload_early_termination_next = 1;
end
state_next = STATE_WRITE_PAYLOAD_TRANSFER_LAST;
end else begin
if (frame_ptr_next == ip_length_reg) begin
// not end of frame, but we have the entire payload
state_next = STATE_WRITE_PAYLOAD_TRANSFER_WAIT_LAST;
end else begin
state_next = STATE_WRITE_PAYLOAD_TRANSFER;
end
end
end else begin
state_next = STATE_WRITE_PAYLOAD_TRANSFER_WAIT;
end
end
STATE_WRITE_PAYLOAD_TRANSFER_LAST: begin
// write last payload word; data in output register; do not accept new data
if (output_eth_payload_tready) begin
// word transfer out - done
state_next = STATE_IDLE;
end else begin
state_next = STATE_WRITE_PAYLOAD_TRANSFER_LAST;
end
end
STATE_WRITE_PAYLOAD_TRANSFER_WAIT_LAST: begin
// wait for end of frame; data in output register; read and discard
if (input_ip_payload_tvalid) begin
if (input_ip_payload_tlast) begin
// assert tlast and transfer tuser
assert_tlast = 1;
assert_tuser = input_ip_payload_tuser;
state_next = STATE_WRITE_PAYLOAD_TRANSFER_LAST;
end else begin
state_next = STATE_WRITE_PAYLOAD_TRANSFER_WAIT_LAST;
end
end else begin
state_next = STATE_WRITE_PAYLOAD_TRANSFER_WAIT_LAST;
end
end
STATE_WAIT_LAST: begin
// wait for end of frame; read and discard
if (input_ip_payload_tvalid) begin
if (input_ip_payload_tlast) begin
state_next = STATE_IDLE;
end else begin
state_next = STATE_WAIT_LAST;
end
end else begin
state_next = STATE_WAIT_LAST;
end
end
endcase
end
always @(posedge clk or posedge rst) begin
if (rst) begin
state_reg <= STATE_IDLE;
frame_ptr_reg <= 0;
hdr_sum_reg <= 0;
payload_len_reg <= 0;
input_ip_hdr_ready_reg <= 0;
input_ip_payload_tready_reg <= 0;
ip_dscp_reg <= 0;
ip_ecn_reg <= 0;
ip_length_reg <= 0;
ip_identification_reg <= 0;
ip_flags_reg <= 0;
ip_fragment_offset_reg <= 0;
ip_ttl_reg <= 0;
ip_protocol_reg <= 0;
ip_source_ip_reg <= 0;
ip_dest_ip_reg <= 0;
output_eth_hdr_valid_reg <= 0;
output_eth_dest_mac_reg <= 0;
output_eth_src_mac_reg <= 0;
output_eth_type_reg <= 0;
output_eth_payload_tdata_reg <= 0;
output_eth_payload_tvalid_reg <= 0;
output_eth_payload_tlast_reg <= 0;
output_eth_payload_tuser_reg <= 0;
temp_eth_payload_tdata_reg <= 0;
temp_eth_payload_tlast_reg <= 0;
temp_eth_payload_tuser_reg <= 0;
busy_reg <= 0;
error_payload_early_termination_reg <= 0;
end else begin
state_reg <= state_next;
frame_ptr_reg <= frame_ptr_next;
hdr_sum_reg <= hdr_sum_next;
payload_len_reg <= payload_len_next;
output_eth_hdr_valid_reg <= output_eth_hdr_valid_next;
busy_reg <= state_next != STATE_IDLE;
error_payload_early_termination_reg <= error_payload_early_termination_next;
// generate valid outputs
case (state_next)
STATE_IDLE: begin
// idle; accept new data
input_ip_hdr_ready_reg <= 1;
input_ip_payload_tready_reg <= 0;
output_eth_payload_tvalid_reg <= 0;
end
STATE_WRITE_HEADER: begin
// write header
input_ip_hdr_ready_reg <= 0;
input_ip_payload_tready_reg <= 0;
output_eth_payload_tvalid_reg <= 1;
end
STATE_WRITE_PAYLOAD_IDLE: begin
// write payload; no data in registers; accept new data
input_ip_hdr_ready_reg <= 0;
input_ip_payload_tready_reg <= 1;
output_eth_payload_tvalid_reg <= 0;
end
STATE_WRITE_PAYLOAD_TRANSFER: begin
// write payload; data in output register; accept new data
input_ip_hdr_ready_reg <= 0;
input_ip_payload_tready_reg <= 1;
output_eth_payload_tvalid_reg <= 1;
end
STATE_WRITE_PAYLOAD_TRANSFER_WAIT: begin
// write payload; data in output and temp registers; do not accept new data
input_ip_hdr_ready_reg <= 0;
input_ip_payload_tready_reg <= 0;
output_eth_payload_tvalid_reg <= 1;
end
STATE_WRITE_PAYLOAD_TRANSFER_LAST: begin
// write last payload word; data in output register; do not accept new data
input_ip_hdr_ready_reg <= 0;
input_ip_payload_tready_reg <= 0;
output_eth_payload_tvalid_reg <= 1;
end
STATE_WRITE_PAYLOAD_TRANSFER_WAIT_LAST: begin
// wait for end of frame; data in output register; read and discard
input_ip_hdr_ready_reg <= 0;
input_ip_payload_tready_reg <= 1;
output_eth_payload_tvalid_reg <= 0;
end
STATE_WAIT_LAST: begin
// wait for end of frame; read and discard
input_ip_hdr_ready_reg <= 0;
input_ip_payload_tready_reg <= 1;
output_eth_payload_tvalid_reg <= 0;
end
endcase
if (store_ip_hdr) begin
output_eth_dest_mac_reg <= input_eth_dest_mac;
output_eth_src_mac_reg <= input_eth_src_mac;
output_eth_type_reg <= input_eth_type;
ip_dscp_reg <= input_ip_dscp;
ip_ecn_reg <= input_ip_ecn;
ip_length_reg <= input_ip_length;
ip_identification_reg <= input_ip_identification;
ip_flags_reg <= input_ip_flags;
ip_fragment_offset_reg <= input_ip_fragment_offset;
ip_ttl_reg <= input_ip_ttl;
ip_protocol_reg <= input_ip_protocol;
ip_source_ip_reg <= input_ip_source_ip;
ip_dest_ip_reg <= input_ip_dest_ip;
end
if (write_hdr_out) begin
output_eth_payload_tdata_reg <= write_hdr_data;
output_eth_payload_tlast_reg <= 0;
output_eth_payload_tuser_reg <= 0;
end else if (transfer_in_out) begin
output_eth_payload_tdata_reg <= input_ip_payload_tdata;
output_eth_payload_tlast_reg <= input_ip_payload_tlast;
output_eth_payload_tuser_reg <= input_ip_payload_tuser;
end else if (transfer_in_temp) begin
temp_eth_payload_tdata_reg <= input_ip_payload_tdata;
temp_eth_payload_tlast_reg <= input_ip_payload_tlast;
temp_eth_payload_tuser_reg <= input_ip_payload_tuser;
end else if (transfer_temp_out) begin
output_eth_payload_tdata_reg <= temp_eth_payload_tdata_reg;
output_eth_payload_tlast_reg <= temp_eth_payload_tlast_reg;
output_eth_payload_tuser_reg <= temp_eth_payload_tuser_reg;
end
if (assert_tlast) output_eth_payload_tlast_reg <= 1;
if (assert_tuser) output_eth_payload_tuser_reg <= 1;
end
end
endmodule

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"""
Copyright (c) 2014 Alex Forencich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
"""
from myhdl import *
import axis_ep
import eth_ep
from Queue import Queue
import struct
class IPFrame(object):
def __init__(self, payload='',
eth_dest_mac=0,
eth_src_mac=0,
eth_type=0,
ip_version=4,
ip_ihl=5,
ip_dscp=0,
ip_ecn=0,
ip_length=None,
ip_identification=0,
ip_flags=2,
ip_fragment_offset=0,
ip_ttl=64,
ip_protocol=0x11,
ip_header_checksum=None,
ip_source_ip=0xc0a80164,
ip_dest_ip=0xc0a80165):
self._payload = axis_ep.AXIStreamFrame()
self.eth_dest_mac = eth_dest_mac
self.eth_src_mac = eth_src_mac
self.eth_type = eth_type
self.ip_version = ip_version
self.ip_ihl = ip_ihl
self.ip_dscp = ip_dscp
self.ip_ecn = ip_ecn
self.ip_length = ip_length
self.ip_identification = ip_identification
self.ip_flags = ip_flags
self.ip_fragment_offset = ip_fragment_offset
self.ip_ttl = ip_ttl
self.ip_protocol = ip_protocol
self.ip_header_checksum = ip_header_checksum
self.ip_source_ip = ip_source_ip
self.ip_dest_ip = ip_dest_ip
if type(payload) is dict:
self.payload = axis_ep.AXIStreamFrame(payload['ip_payload'])
self.eth_dest_mac = payload['eth_dest_mac']
self.eth_src_mac = payload['eth_src_mac']
self.eth_type = payload['eth_type']
self.ip_version = payload['ip_version']
self.ip_ihl = payload['ip_ihl']
self.ip_dscp = payload['ip_dscp']
self.ip_ecn = payload['ip_ecn']
self.ip_length = payload['ip_length']
self.ip_identification = payload['ip_identification']
self.ip_flags = payload['ip_flags']
self.ip_fragment_offset = payload['ip_fragment_offset']
self.ip_ttl = payload['ip_ttl']
self.ip_protocol = payload['ip_protocol']
self.ip_header_checksum = payload['ip_header_checksum']
self.ip_source_ip = payload['ip_source_ip']
self.ip_dest_ip = payload['ip_dest_ip']
if type(payload) is bytes:
payload = bytearray(payload)
if type(payload) is bytearray or type(payload) is axis_ep.AXIStreamFrame:
self.payload = axis_ep.AXIStreamFrame(payload)
if type(payload) is IPFrame:
self.payload = axis_ep.AXIStreamFrame(payload.payload)
self.eth_dest_mac = payload.eth_dest_mac
self.eth_src_mac = payload.eth_src_mac
self.eth_type = payload.eth_type
self.ip_version = payload.ip_version
self.ip_ihl = payload.ip_ihl
self.ip_dscp = payload.ip_dscp
self.ip_ecn = payload.ip_ecn
self.ip_length = payload.ip_length
self.ip_identification = payload.ip_identification
self.ip_flags = payload.ip_flags
self.ip_fragment_offset = payload.ip_fragment_offset
self.ip_ttl = payload.ip_ttl
self.ip_protocol = payload.ip_protocol
self.ip_header_checksum = payload.ip_header_checksum
self.ip_source_ip = payload.ip_source_ip
self.ip_dest_ip = payload.ip_dest_ip
@property
def payload(self):
return self._payload
@payload.setter
def payload(self, value):
self._payload = axis_ep.AXIStreamFrame(value)
def update_length(self):
self.ip_length = len(self.payload.data) + 20
def checksum(self):
cksum = self.ip_version << 12 | self.ip_ihl << 8 | self.ip_dscp << 2 | self.ip_ecn
cksum += self.ip_length
cksum += self.ip_identification
cksum += self.ip_flags << 13 | self.ip_fragment_offset
cksum += self.ip_ttl << 8 | self.ip_protocol
cksum += self.ip_source_ip & 0xffff
cksum += (self.ip_source_ip >> 16) & 0xffff
cksum += self.ip_dest_ip & 0xffff
cksum += (self.ip_dest_ip >> 16) & 0xffff
cksum = (cksum & 0xffff) + (cksum >> 16)
cksum = (cksum & 0xffff) + (cksum >> 16)
return ~cksum & 0xffff
def update_checksum(self):
self.ip_header_checksum = self.checksum()
def build(self):
if self.ip_length is None:
self.update_length()
if self.ip_header_checksum is None:
self.update_checksum()
def build_axis(self):
return self.build_eth().build_axis()
def build_eth(self):
self.build()
data = ''
data += struct.pack('B', self.ip_version << 4 | self.ip_ihl)
data += struct.pack('B', self.ip_dscp << 2 | self.ip_ecn)
data += struct.pack('>H', self.ip_length)
data += struct.pack('>H', self.ip_identification)
data += struct.pack('>H', self.ip_flags << 13 | self.ip_fragment_offset)
data += struct.pack('B', self.ip_ttl)
data += struct.pack('B', self.ip_protocol)
data += struct.pack('>H', self.ip_header_checksum)
data += struct.pack('>L', self.ip_source_ip)
data += struct.pack('>L', self.ip_dest_ip)
data += self.payload.data
return eth_ep.EthFrame(data, self.eth_dest_mac, self.eth_src_mac, self.eth_type)
def parse_axis(self, data):
frame = eth_ep.EthFrame()
frame.parse_axis(data)
self.parse_eth(frame)
def parse_eth(self, data):
self.eth_src_mac = data.eth_src_mac
self.eth_dest_mac = data.eth_dest_mac
self.eth_type = data.eth_type
v = struct.unpack('B', data.payload.data[0:1])[0]
self.ip_version = (v >> 4) & 0xF
self.ip_ihl = v & 0xF
v = struct.unpack('B', data.payload.data[1:2])[0]
self.ip_dscp = (v >> 2) & 0x3F
self.ip_ecn = v & 0x3
self.ip_length = struct.unpack('>H', data.payload.data[2:4])[0]
self.ip_identification = struct.unpack('>H', data.payload.data[4:6])[0]
v = struct.unpack('>H', data.payload.data[6:8])[0]
self.ip_flags = (v >> 13) & 0x7
self.ip_fragment_offset = v & 0x1FFF
self.ip_ttl = struct.unpack('B', data.payload.data[8:9])[0]
self.ip_protocol = struct.unpack('B', data.payload.data[9:10])[0]
self.ip_header_checksum = struct.unpack('>H', data.payload.data[10:12])[0]
self.ip_source_ip = struct.unpack('>L', data.payload.data[12:16])[0]
self.ip_dest_ip = struct.unpack('>L', data.payload.data[16:20])[0]
self.payload = axis_ep.AXIStreamFrame(data.payload.data[20:])
def __eq__(self, other):
if type(other) is IPFrame:
return (self.eth_src_mac == other.eth_src_mac and
self.eth_dest_mac == other.eth_dest_mac and
self.eth_type == other.eth_type and
self.ip_version == other.ip_version and
self.ip_ihl == other.ip_ihl and
self.ip_dscp == other.ip_dscp and
self.ip_ecn == other.ip_ecn and
self.ip_length == other.ip_length and
self.ip_identification == other.ip_identification and
self.ip_flags == other.ip_flags and
self.ip_fragment_offset == other.ip_fragment_offset and
self.ip_ttl == other.ip_ttl and
self.ip_protocol == other.ip_protocol and
self.ip_header_checksum == other.ip_header_checksum and
self.ip_source_ip == other.ip_source_ip and
self.ip_dest_ip == other.ip_dest_ip and
self.payload == other.payload)
def __repr__(self):
return (('IPFrame(payload=%s, ' % repr(self.payload)) +
('eth_dest_mac=0x%012x, ' % self.eth_dest_mac) +
('eth_src_mac=0x%012x, ' % self.eth_src_mac) +
('eth_type=0x%04x, ' % self.eth_type) +
('ip_version=%d, ' % self.ip_version) +
('ip_ihl=%d, ' % self.ip_ihl) +
('ip_dscp=%d, ' % self.ip_dscp) +
('ip_ecn=%d, ' % self.ip_ecn) +
('ip_length=%d, ' % self.ip_length) +
('ip_identification=%d, ' % self.ip_identification) +
('ip_flags=%d, ' % self.ip_flags) +
('ip_fragment_offset=%d, ' % self.ip_fragment_offset) +
('ip_ttl=%d, ' % self.ip_ttl) +
('ip_protocol=0x%02x, ' % self.ip_protocol) +
('ip_header_checksum=%x, ' % self.ip_header_checksum) +
('ip_source_ip=0x%08x, ' % self.ip_source_ip) +
('ip_dest_ip=0x%08x)' % self.ip_dest_ip))
def IPFrameSource(clk, rst,
ip_hdr_valid=None,
ip_hdr_ready=None,
eth_dest_mac=Signal(intbv(0)[48:]),
eth_src_mac=Signal(intbv(0)[48:]),
eth_type=Signal(intbv(0)[16:]),
ip_version=Signal(intbv(4)[4:]),
ip_ihl=Signal(intbv(5)[4:]),
ip_dscp=Signal(intbv(0)[6:]),
ip_ecn=Signal(intbv(0)[2:]),
ip_length=Signal(intbv(0)[16:]),
ip_identification=Signal(intbv(0)[16:]),
ip_flags=Signal(intbv(0)[3:]),
ip_fragment_offset=Signal(intbv(0)[13:]),
ip_ttl=Signal(intbv(0)[8:]),
ip_protocol=Signal(intbv(0)[8:]),
ip_header_checksum=Signal(intbv(0)[16:]),
ip_source_ip=Signal(intbv(0)[32:]),
ip_dest_ip=Signal(intbv(0)[32:]),
ip_payload_tdata=None,
ip_payload_tkeep=Signal(bool(True)),
ip_payload_tvalid=Signal(bool(False)),
ip_payload_tready=Signal(bool(True)),
ip_payload_tlast=Signal(bool(False)),
ip_payload_tuser=Signal(bool(False)),
fifo=None,
pause=0,
name=None):
ip_hdr_ready_int = Signal(bool(False))
ip_hdr_valid_int = Signal(bool(False))
ip_payload_pause = Signal(bool(False))
ip_payload_fifo = Queue()
ip_payload_source = axis_ep.AXIStreamSource(clk,
rst,
tdata=ip_payload_tdata,
tkeep=ip_payload_tkeep,
tvalid=ip_payload_tvalid,
tready=ip_payload_tready,
tlast=ip_payload_tlast,
tuser=ip_payload_tuser,
fifo=ip_payload_fifo,
pause=ip_payload_pause)
@always_comb
def pause_logic():
ip_hdr_ready_int.next = ip_hdr_ready and not pause
ip_hdr_valid.next = ip_hdr_valid_int and not pause
ip_payload_pause.next = pause # or ip_hdr_valid_int
@instance
def logic():
frame = dict()
while True:
yield clk.posedge, rst.posedge
if rst:
ip_hdr_valid_int.next = False
else:
if ip_hdr_ready_int:
ip_hdr_valid_int.next = False
if (ip_payload_tlast and ip_hdr_ready_int and ip_hdr_valid) or not ip_hdr_valid_int:
if not fifo.empty():
frame = fifo.get()
frame = IPFrame(frame)
frame.build()
eth_dest_mac.next = frame.eth_dest_mac
eth_src_mac.next = frame.eth_src_mac
eth_type.next = frame.eth_type
ip_version.next = frame.ip_version
ip_ihl.next = frame.ip_ihl
ip_dscp.next = frame.ip_dscp
ip_ecn.next = frame.ip_ecn
ip_length.next = frame.ip_length
ip_identification.next = frame.ip_identification
ip_flags.next = frame.ip_flags
ip_fragment_offset.next = frame.ip_fragment_offset
ip_ttl.next = frame.ip_ttl
ip_protocol.next = frame.ip_protocol
ip_header_checksum.next = frame.ip_header_checksum
ip_source_ip.next = frame.ip_source_ip
ip_dest_ip.next = frame.ip_dest_ip
ip_payload_fifo.put(frame.payload)
if name is not None:
print("[%s] Sending frame %s" % (name, repr(frame)))
ip_hdr_valid_int.next = True
return logic, pause_logic, ip_payload_source
def IPFrameSink(clk, rst,
ip_hdr_valid=None,
ip_hdr_ready=None,
eth_dest_mac=Signal(intbv(0)[48:]),
eth_src_mac=Signal(intbv(0)[48:]),
eth_type=Signal(intbv(0)[16:]),
ip_version=Signal(intbv(4)[4:]),
ip_ihl=Signal(intbv(5)[4:]),
ip_dscp=Signal(intbv(0)[6:]),
ip_ecn=Signal(intbv(0)[2:]),
ip_length=Signal(intbv(0)[16:]),
ip_identification=Signal(intbv(0)[16:]),
ip_flags=Signal(intbv(0)[3:]),
ip_fragment_offset=Signal(intbv(0)[13:]),
ip_ttl=Signal(intbv(0)[8:]),
ip_protocol=Signal(intbv(0)[8:]),
ip_header_checksum=Signal(intbv(0)[16:]),
ip_source_ip=Signal(intbv(0)[32:]),
ip_dest_ip=Signal(intbv(0)[32:]),
ip_payload_tdata=None,
ip_payload_tkeep=Signal(bool(True)),
ip_payload_tvalid=Signal(bool(True)),
ip_payload_tready=Signal(bool(True)),
ip_payload_tlast=Signal(bool(True)),
ip_payload_tuser=Signal(bool(False)),
fifo=None,
pause=0,
name=None):
ip_hdr_ready_int = Signal(bool(False))
ip_hdr_valid_int = Signal(bool(False))
ip_payload_pause = Signal(bool(False))
ip_payload_fifo = Queue()
ip_header_fifo = Queue()
ip_payload_sink = axis_ep.AXIStreamSink(clk,
rst,
tdata=ip_payload_tdata,
tkeep=ip_payload_tkeep,
tvalid=ip_payload_tvalid,
tready=ip_payload_tready,
tlast=ip_payload_tlast,
tuser=ip_payload_tuser,
fifo=ip_payload_fifo,
pause=ip_payload_pause)
@always_comb
def pause_logic():
ip_hdr_ready.next = ip_hdr_ready_int and not pause
ip_hdr_valid_int.next = ip_hdr_valid and not pause
ip_payload_pause.next = pause # or ip_hdr_valid_int
@instance
def logic():
frame = IPFrame()
while True:
yield clk.posedge, rst.posedge
if rst:
ip_hdr_ready_int.next = False
frame = IPFrame()
else:
ip_hdr_ready_int.next = True
if ip_hdr_ready_int and ip_hdr_valid_int:
frame = IPFrame()
frame.eth_dest_mac = int(eth_dest_mac)
frame.eth_src_mac = int(eth_src_mac)
frame.eth_type = int(eth_type)
frame.ip_version = int(ip_version)
frame.ip_ihl = int(ip_ihl)
frame.ip_dscp = int(ip_dscp)
frame.ip_ecn = int(ip_ecn)
frame.ip_length = int(ip_length)
frame.ip_identification = int(ip_identification)
frame.ip_flags = int(ip_flags)
frame.ip_fragment_offset = int(ip_fragment_offset)
frame.ip_ttl = int(ip_ttl)
frame.ip_protocol = int(ip_protocol)
frame.ip_header_checksum = int(ip_header_checksum)
frame.ip_source_ip = int(ip_source_ip)
frame.ip_dest_ip = int(ip_dest_ip)
ip_header_fifo.put(frame)
if not ip_payload_fifo.empty() and not ip_header_fifo.empty():
frame = ip_header_fifo.get()
frame.payload = ip_payload_fifo.get()
fifo.put(frame)
if name is not None:
print("[%s] Got frame %s" % (name, repr(frame)))
frame = dict()
return logic, pause_logic, ip_payload_sink

996
tb/test_ip_eth_rx.py Executable file
View File

@ -0,0 +1,996 @@
#!/usr/bin/env python2
"""
Copyright (c) 2014 Alex Forencich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
"""
from myhdl import *
import os
from Queue import Queue
import eth_ep
import ip_ep
module = 'ip_eth_rx'
srcs = []
srcs.append("../rtl/%s.v" % module)
srcs.append("test_%s.v" % module)
src = ' '.join(srcs)
build_cmd = "iverilog -o test_%s.vvp %s" % (module, src)
def dut_ip_eth_rx(clk,
rst,
current_test,
input_eth_hdr_valid,
input_eth_hdr_ready,
input_eth_dest_mac,
input_eth_src_mac,
input_eth_type,
input_eth_payload_tdata,
input_eth_payload_tvalid,
input_eth_payload_tready,
input_eth_payload_tlast,
input_eth_payload_tuser,
output_ip_hdr_valid,
output_ip_hdr_ready,
output_eth_dest_mac,
output_eth_src_mac,
output_eth_type,
output_ip_version,
output_ip_ihl,
output_ip_dscp,
output_ip_ecn,
output_ip_length,
output_ip_identification,
output_ip_flags,
output_ip_fragment_offset,
output_ip_ttl,
output_ip_protocol,
output_ip_header_checksum,
output_ip_source_ip,
output_ip_dest_ip,
output_ip_payload_tdata,
output_ip_payload_tvalid,
output_ip_payload_tready,
output_ip_payload_tlast,
output_ip_payload_tuser,
busy,
error_header_early_termination,
error_payload_early_termination,
error_invalid_header,
error_invalid_checksum):
if os.system(build_cmd):
raise Exception("Error running build command")
return Cosimulation("vvp -m myhdl test_%s.vvp -lxt2" % module,
clk=clk,
rst=rst,
current_test=current_test,
input_eth_hdr_valid=input_eth_hdr_valid,
input_eth_hdr_ready=input_eth_hdr_ready,
input_eth_dest_mac=input_eth_dest_mac,
input_eth_src_mac=input_eth_src_mac,
input_eth_type=input_eth_type,
input_eth_payload_tdata=input_eth_payload_tdata,
input_eth_payload_tvalid=input_eth_payload_tvalid,
input_eth_payload_tready=input_eth_payload_tready,
input_eth_payload_tlast=input_eth_payload_tlast,
input_eth_payload_tuser=input_eth_payload_tuser,
output_ip_hdr_valid=output_ip_hdr_valid,
output_ip_hdr_ready=output_ip_hdr_ready,
output_eth_dest_mac=output_eth_dest_mac,
output_eth_src_mac=output_eth_src_mac,
output_eth_type=output_eth_type,
output_ip_version=output_ip_version,
output_ip_ihl=output_ip_ihl,
output_ip_dscp=output_ip_dscp,
output_ip_ecn=output_ip_ecn,
output_ip_length=output_ip_length,
output_ip_identification=output_ip_identification,
output_ip_flags=output_ip_flags,
output_ip_fragment_offset=output_ip_fragment_offset,
output_ip_ttl=output_ip_ttl,
output_ip_protocol=output_ip_protocol,
output_ip_header_checksum=output_ip_header_checksum,
output_ip_source_ip=output_ip_source_ip,
output_ip_dest_ip=output_ip_dest_ip,
output_ip_payload_tdata=output_ip_payload_tdata,
output_ip_payload_tvalid=output_ip_payload_tvalid,
output_ip_payload_tready=output_ip_payload_tready,
output_ip_payload_tlast=output_ip_payload_tlast,
output_ip_payload_tuser=output_ip_payload_tuser,
busy=busy,
error_header_early_termination=error_header_early_termination,
error_payload_early_termination=error_payload_early_termination,
error_invalid_header=error_invalid_header,
error_invalid_checksum=error_invalid_checksum)
def bench():
# Inputs
clk = Signal(bool(0))
rst = Signal(bool(0))
current_test = Signal(intbv(0)[8:])
input_eth_hdr_valid = Signal(bool(0))
input_eth_dest_mac = Signal(intbv(0)[48:])
input_eth_src_mac = Signal(intbv(0)[48:])
input_eth_type = Signal(intbv(0)[16:])
input_eth_payload_tdata = Signal(intbv(0)[8:])
input_eth_payload_tvalid = Signal(bool(0))
input_eth_payload_tlast = Signal(bool(0))
input_eth_payload_tuser = Signal(bool(0))
output_ip_hdr_ready = Signal(bool(0))
output_ip_payload_tready = Signal(bool(0))
# Outputs
input_eth_hdr_ready = Signal(bool(0))
input_eth_payload_tready = Signal(bool(0))
output_ip_hdr_valid = Signal(bool(0))
output_eth_dest_mac = Signal(intbv(0)[48:])
output_eth_src_mac = Signal(intbv(0)[48:])
output_eth_type = Signal(intbv(0)[16:])
output_ip_version = Signal(intbv(0)[4:])
output_ip_ihl = Signal(intbv(0)[4:])
output_ip_dscp = Signal(intbv(0)[6:])
output_ip_ecn = Signal(intbv(0)[2:])
output_ip_length = Signal(intbv(0)[16:])
output_ip_identification = Signal(intbv(0)[16:])
output_ip_flags = Signal(intbv(0)[3:])
output_ip_fragment_offset = Signal(intbv(0)[13:])
output_ip_ttl = Signal(intbv(0)[8:])
output_ip_protocol = Signal(intbv(0)[8:])
output_ip_header_checksum = Signal(intbv(0)[16:])
output_ip_source_ip = Signal(intbv(0)[32:])
output_ip_dest_ip = Signal(intbv(0)[32:])
output_ip_payload_tdata = Signal(intbv(0)[8:])
output_ip_payload_tvalid = Signal(bool(0))
output_ip_payload_tlast = Signal(bool(0))
output_ip_payload_tuser = Signal(bool(0))
busy = Signal(bool(0))
error_header_early_termination = Signal(bool(0))
error_payload_early_termination = Signal(bool(0))
error_invalid_header = Signal(bool(0))
error_invalid_checksum = Signal(bool(0))
# sources and sinks
source_queue = Queue()
source_pause = Signal(bool(0))
sink_queue = Queue()
sink_pause = Signal(bool(0))
source = eth_ep.EthFrameSource(clk,
rst,
eth_hdr_ready=input_eth_hdr_ready,
eth_hdr_valid=input_eth_hdr_valid,
eth_dest_mac=input_eth_dest_mac,
eth_src_mac=input_eth_src_mac,
eth_type=input_eth_type,
eth_payload_tdata=input_eth_payload_tdata,
eth_payload_tvalid=input_eth_payload_tvalid,
eth_payload_tready=input_eth_payload_tready,
eth_payload_tlast=input_eth_payload_tlast,
eth_payload_tuser=input_eth_payload_tuser,
fifo=source_queue,
pause=source_pause,
name='source')
sink = ip_ep.IPFrameSink(clk,
rst,
ip_hdr_ready=output_ip_hdr_ready,
ip_hdr_valid=output_ip_hdr_valid,
eth_dest_mac=output_eth_dest_mac,
eth_src_mac=output_eth_src_mac,
eth_type=output_eth_type,
ip_version=output_ip_version,
ip_ihl=output_ip_ihl,
ip_dscp=output_ip_dscp,
ip_ecn=output_ip_ecn,
ip_length=output_ip_length,
ip_identification=output_ip_identification,
ip_flags=output_ip_flags,
ip_fragment_offset=output_ip_fragment_offset,
ip_ttl=output_ip_ttl,
ip_protocol=output_ip_protocol,
ip_header_checksum=output_ip_header_checksum,
ip_source_ip=output_ip_source_ip,
ip_dest_ip=output_ip_dest_ip,
ip_payload_tdata=output_ip_payload_tdata,
ip_payload_tvalid=output_ip_payload_tvalid,
ip_payload_tready=output_ip_payload_tready,
ip_payload_tlast=output_ip_payload_tlast,
ip_payload_tuser=output_ip_payload_tuser,
fifo=sink_queue,
pause=sink_pause,
name='sink')
# DUT
dut = dut_ip_eth_rx(clk,
rst,
current_test,
input_eth_hdr_valid,
input_eth_hdr_ready,
input_eth_dest_mac,
input_eth_src_mac,
input_eth_type,
input_eth_payload_tdata,
input_eth_payload_tvalid,
input_eth_payload_tready,
input_eth_payload_tlast,
input_eth_payload_tuser,
output_ip_hdr_valid,
output_ip_hdr_ready,
output_eth_dest_mac,
output_eth_src_mac,
output_eth_type,
output_ip_version,
output_ip_ihl,
output_ip_dscp,
output_ip_ecn,
output_ip_length,
output_ip_identification,
output_ip_flags,
output_ip_fragment_offset,
output_ip_ttl,
output_ip_protocol,
output_ip_header_checksum,
output_ip_source_ip,
output_ip_dest_ip,
output_ip_payload_tdata,
output_ip_payload_tvalid,
output_ip_payload_tready,
output_ip_payload_tlast,
output_ip_payload_tuser,
busy,
error_header_early_termination,
error_payload_early_termination,
error_invalid_header,
error_invalid_checksum)
@always(delay(4))
def clkgen():
clk.next = not clk
@instance
def check():
yield delay(100)
yield clk.posedge
rst.next = 1
yield clk.posedge
rst.next = 0
yield clk.posedge
yield delay(100)
yield clk.posedge
yield clk.posedge
print("test 1: test packet")
current_test.next = 1
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
source_queue.put(test_frame.build_eth())
yield clk.posedge
yield output_ip_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame
yield delay(100)
yield clk.posedge
print("test 2: longer packet")
current_test.next = 2
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = bytearray(range(256))
test_frame.build()
source_queue.put(test_frame.build_eth())
yield clk.posedge
yield output_ip_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame
yield delay(100)
yield clk.posedge
print("test 3: test packet with pauses")
current_test.next = 3
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = bytearray(range(256))
test_frame.build()
source_queue.put(test_frame.build_eth())
yield clk.posedge
yield delay(128)
yield clk.posedge
source_pause.next = True
yield delay(32)
yield clk.posedge
source_pause.next = False
yield delay(64)
yield clk.posedge
sink_pause.next = True
yield delay(32)
yield clk.posedge
sink_pause.next = False
yield output_ip_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame
yield delay(100)
yield clk.posedge
print("test 4: back-to-back packets")
current_test.next = 4
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame2.build()
source_queue.put(test_frame1.build_eth())
source_queue.put(test_frame2.build_eth())
yield clk.posedge
yield output_ip_payload_tlast.posedge
yield clk.posedge
yield output_ip_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 5: alternate pause source")
current_test.next = 5
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = bytearray(range(32))
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = bytearray(range(32))
test_frame2.build()
source_queue.put(test_frame1.build_eth())
source_queue.put(test_frame2.build_eth())
yield clk.posedge
while input_eth_payload_tvalid or output_ip_payload_tvalid:
source_pause.next = True
yield clk.posedge
yield clk.posedge
yield clk.posedge
source_pause.next = False
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 6: alternate pause sink")
current_test.next = 6
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = bytearray(range(32))
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = bytearray(range(32))
test_frame2.build()
source_queue.put(test_frame1.build_eth())
source_queue.put(test_frame2.build_eth())
yield clk.posedge
while input_eth_payload_tvalid or output_ip_payload_tvalid:
sink_pause.next = True
yield clk.posedge
yield clk.posedge
yield clk.posedge
sink_pause.next = False
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 7: alternate pause source 2")
current_test.next = 7
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = bytearray(range(32))
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = bytearray(range(33))
test_frame2.build()
source_queue.put(test_frame1.build_eth())
source_queue.put(test_frame2.build_eth())
yield clk.posedge
while input_eth_payload_tvalid or output_ip_payload_tvalid:
source_pause.next = True
yield clk.posedge
yield clk.posedge
yield clk.posedge
source_pause.next = False
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 8: alternate pause sink 2")
current_test.next = 8
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = bytearray(range(33))
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = bytearray(range(33))
test_frame2.build()
source_queue.put(test_frame1.build_eth())
source_queue.put(test_frame2.build_eth())
yield clk.posedge
while input_eth_payload_tvalid or output_ip_payload_tvalid:
sink_pause.next = True
yield clk.posedge
yield clk.posedge
yield clk.posedge
sink_pause.next = False
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 9: tuser assert")
current_test.next = 9
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
eth_frame = test_frame.build_eth()
eth_frame.payload.user = 1
source_queue.put(eth_frame)
yield clk.posedge
yield output_ip_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame
assert rx_frame.payload.user[-1]
yield delay(100)
yield clk.posedge
print("test 10: truncated packet")
current_test.next = 10
eth_frame = eth_ep.EthFrame()
eth_frame.eth_dest_mac = 0xDAD1D2D3D4D5
eth_frame.eth_src_mac = 0x5A5152535455
eth_frame.eth_type = 0x0800
eth_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
source_queue.put(eth_frame)
yield clk.posedge
yield input_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
assert error_header_early_termination
yield delay(100)
yield clk.posedge
print("test 11: trailing bytes")
current_test.next = 11
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
eth_frame = test_frame.build_eth()
eth_frame.payload.data += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
source_queue.put(eth_frame)
yield clk.posedge
yield output_ip_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame
yield clk.posedge
print("test 12: trailing bytes with tuser assert")
current_test.next = 12
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
eth_frame = test_frame.build_eth()
eth_frame.payload.data += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
eth_frame.payload.user = 1
source_queue.put(eth_frame)
yield clk.posedge
yield output_ip_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
assert rx_frame == test_frame
assert rx_frame.payload.user[-1]
yield delay(100)
yield clk.posedge
print("test 13: truncated payload")
current_test.next = 13
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = 32
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02'
test_frame.build()
source_queue.put(test_frame.build_eth())
yield clk.posedge
yield output_ip_payload_tlast.posedge
yield clk.posedge
assert error_payload_early_termination
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
#assert rx_frame == test_frame
assert rx_frame.payload.user[-1]
yield delay(100)
yield clk.posedge
print("test 14: bad IHL")
current_test.next = 14
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 6
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
source_queue.put(test_frame.build_eth())
yield clk.posedge
yield delay(160)
yield clk.posedge
yield clk.posedge
assert error_invalid_header
yield input_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
yield delay(100)
yield clk.posedge
print("test 15: bad checksum")
current_test.next = 15
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = 0x1234
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
source_queue.put(test_frame.build_eth())
yield clk.posedge
yield delay(160)
yield clk.posedge
yield clk.posedge
assert error_invalid_checksum
yield input_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
yield delay(100)
raise StopSimulation
return dut, source, sink, clkgen, check
def test_bench():
sim = Simulation(bench())
sim.run()
if __name__ == '__main__':
print("Running test...")
test_bench()

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tb/test_ip_eth_rx.v Normal file
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@ -0,0 +1,173 @@
/*
Copyright (c) 2014 Alex Forencich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
// Language: Verilog 2001
`timescale 1 ns / 1 ps
module test_ip_eth_rx;
// Inputs
reg clk = 0;
reg rst = 0;
reg [7:0] current_test = 0;
reg input_eth_hdr_valid = 0;
reg [47:0] input_eth_dest_mac = 0;
reg [47:0] input_eth_src_mac = 0;
reg [15:0] input_eth_type = 0;
reg [7:0] input_eth_payload_tdata = 0;
reg input_eth_payload_tvalid = 0;
reg input_eth_payload_tlast = 0;
reg input_eth_payload_tuser = 0;
reg output_ip_hdr_ready = 0;
reg output_ip_payload_tready = 0;
// Outputs
wire input_eth_hdr_ready;
wire input_eth_payload_tready;
wire output_ip_hdr_valid;
wire [47:0] output_eth_dest_mac;
wire [47:0] output_eth_src_mac;
wire [15:0] output_eth_type;
wire [3:0] output_ip_version;
wire [3:0] output_ip_ihl;
wire [5:0] output_ip_dscp;
wire [1:0] output_ip_ecn;
wire [15:0] output_ip_length;
wire [15:0] output_ip_identification;
wire [2:0] output_ip_flags;
wire [12:0] output_ip_fragment_offset;
wire [7:0] output_ip_ttl;
wire [7:0] output_ip_protocol;
wire [15:0] output_ip_header_checksum;
wire [31:0] output_ip_source_ip;
wire [31:0] output_ip_dest_ip;
wire [7:0] output_ip_payload_tdata;
wire output_ip_payload_tvalid;
wire output_ip_payload_tlast;
wire output_ip_payload_tuser;
wire busy;
wire error_header_early_termination;
wire error_payload_early_termination;
wire error_invalid_header;
wire error_invalid_checksum;
initial begin
// myhdl integration
$from_myhdl(clk,
rst,
current_test,
input_eth_hdr_valid,
input_eth_dest_mac,
input_eth_src_mac,
input_eth_type,
input_eth_payload_tdata,
input_eth_payload_tvalid,
input_eth_payload_tlast,
input_eth_payload_tuser,
output_ip_hdr_ready,
output_ip_payload_tready);
$to_myhdl(input_eth_hdr_ready,
input_eth_payload_tready,
output_ip_hdr_valid,
output_eth_dest_mac,
output_eth_src_mac,
output_eth_type,
output_ip_version,
output_ip_ihl,
output_ip_dscp,
output_ip_ecn,
output_ip_length,
output_ip_identification,
output_ip_flags,
output_ip_fragment_offset,
output_ip_ttl,
output_ip_protocol,
output_ip_header_checksum,
output_ip_source_ip,
output_ip_dest_ip,
output_ip_payload_tdata,
output_ip_payload_tvalid,
output_ip_payload_tlast,
output_ip_payload_tuser,
busy,
error_header_early_termination,
error_payload_early_termination,
error_invalid_header,
error_invalid_checksum);
// dump file
$dumpfile("test_ip_eth_rx.lxt");
$dumpvars(0, test_ip_eth_rx);
end
ip_eth_rx
UUT (
.clk(clk),
.rst(rst),
// Ethernet frame input
.input_eth_hdr_valid(input_eth_hdr_valid),
.input_eth_hdr_ready(input_eth_hdr_ready),
.input_eth_dest_mac(input_eth_dest_mac),
.input_eth_src_mac(input_eth_src_mac),
.input_eth_type(input_eth_type),
.input_eth_payload_tdata(input_eth_payload_tdata),
.input_eth_payload_tvalid(input_eth_payload_tvalid),
.input_eth_payload_tready(input_eth_payload_tready),
.input_eth_payload_tlast(input_eth_payload_tlast),
.input_eth_payload_tuser(input_eth_payload_tuser),
// IP frame output
.output_ip_hdr_valid(output_ip_hdr_valid),
.output_ip_hdr_ready(output_ip_hdr_ready),
.output_eth_dest_mac(output_eth_dest_mac),
.output_eth_src_mac(output_eth_src_mac),
.output_eth_type(output_eth_type),
.output_ip_version(output_ip_version),
.output_ip_ihl(output_ip_ihl),
.output_ip_dscp(output_ip_dscp),
.output_ip_ecn(output_ip_ecn),
.output_ip_length(output_ip_length),
.output_ip_identification(output_ip_identification),
.output_ip_flags(output_ip_flags),
.output_ip_fragment_offset(output_ip_fragment_offset),
.output_ip_ttl(output_ip_ttl),
.output_ip_protocol(output_ip_protocol),
.output_ip_header_checksum(output_ip_header_checksum),
.output_ip_source_ip(output_ip_source_ip),
.output_ip_dest_ip(output_ip_dest_ip),
.output_ip_payload_tdata(output_ip_payload_tdata),
.output_ip_payload_tvalid(output_ip_payload_tvalid),
.output_ip_payload_tready(output_ip_payload_tready),
.output_ip_payload_tlast(output_ip_payload_tlast),
.output_ip_payload_tuser(output_ip_payload_tuser),
// Status signals
.busy(busy),
.error_header_early_termination(error_header_early_termination),
.error_payload_early_termination(error_payload_early_termination),
.error_invalid_header(error_invalid_header),
.error_invalid_checksum(error_invalid_checksum)
);
endmodule

945
tb/test_ip_eth_tx.py Executable file
View File

@ -0,0 +1,945 @@
#!/usr/bin/env python2
"""
Copyright (c) 2014 Alex Forencich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
"""
from myhdl import *
import os
from Queue import Queue
import eth_ep
import ip_ep
module = 'ip_eth_tx'
srcs = []
srcs.append("../rtl/%s.v" % module)
srcs.append("test_%s.v" % module)
src = ' '.join(srcs)
build_cmd = "iverilog -o test_%s.vvp %s" % (module, src)
def dut_ip_eth_tx(clk,
rst,
current_test,
input_ip_hdr_valid,
input_ip_hdr_ready,
input_eth_dest_mac,
input_eth_src_mac,
input_eth_type,
input_ip_dscp,
input_ip_ecn,
input_ip_length,
input_ip_identification,
input_ip_flags,
input_ip_fragment_offset,
input_ip_ttl,
input_ip_protocol,
input_ip_source_ip,
input_ip_dest_ip,
input_ip_payload_tdata,
input_ip_payload_tvalid,
input_ip_payload_tready,
input_ip_payload_tlast,
input_ip_payload_tuser,
output_eth_hdr_valid,
output_eth_hdr_ready,
output_eth_dest_mac,
output_eth_src_mac,
output_eth_type,
output_eth_payload_tdata,
output_eth_payload_tvalid,
output_eth_payload_tready,
output_eth_payload_tlast,
output_eth_payload_tuser,
busy,
error_payload_early_termination):
if os.system(build_cmd):
raise Exception("Error running build command")
return Cosimulation("vvp -m myhdl test_%s.vvp -lxt2" % module,
clk=clk,
rst=rst,
current_test=current_test,
input_ip_hdr_valid=input_ip_hdr_valid,
input_ip_hdr_ready=input_ip_hdr_ready,
input_eth_dest_mac=input_eth_dest_mac,
input_eth_src_mac=input_eth_src_mac,
input_eth_type=input_eth_type,
input_ip_dscp=input_ip_dscp,
input_ip_ecn=input_ip_ecn,
input_ip_length=input_ip_length,
input_ip_identification=input_ip_identification,
input_ip_flags=input_ip_flags,
input_ip_fragment_offset=input_ip_fragment_offset,
input_ip_ttl=input_ip_ttl,
input_ip_protocol=input_ip_protocol,
input_ip_source_ip=input_ip_source_ip,
input_ip_dest_ip=input_ip_dest_ip,
input_ip_payload_tdata=input_ip_payload_tdata,
input_ip_payload_tvalid=input_ip_payload_tvalid,
input_ip_payload_tready=input_ip_payload_tready,
input_ip_payload_tlast=input_ip_payload_tlast,
input_ip_payload_tuser=input_ip_payload_tuser,
output_eth_hdr_valid=output_eth_hdr_valid,
output_eth_hdr_ready=output_eth_hdr_ready,
output_eth_dest_mac=output_eth_dest_mac,
output_eth_src_mac=output_eth_src_mac,
output_eth_type=output_eth_type,
output_eth_payload_tdata=output_eth_payload_tdata,
output_eth_payload_tvalid=output_eth_payload_tvalid,
output_eth_payload_tready=output_eth_payload_tready,
output_eth_payload_tlast=output_eth_payload_tlast,
output_eth_payload_tuser=output_eth_payload_tuser,
busy=busy,
error_payload_early_termination=error_payload_early_termination)
def bench():
# Inputs
clk = Signal(bool(0))
rst = Signal(bool(0))
current_test = Signal(intbv(0)[8:])
input_ip_hdr_valid = Signal(bool(0))
input_eth_dest_mac = Signal(intbv(0)[48:])
input_eth_src_mac = Signal(intbv(0)[48:])
input_eth_type = Signal(intbv(0)[16:])
input_ip_dscp = Signal(intbv(0)[6:])
input_ip_ecn = Signal(intbv(0)[2:])
input_ip_length = Signal(intbv(0)[16:])
input_ip_identification = Signal(intbv(0)[16:])
input_ip_flags = Signal(intbv(0)[3:])
input_ip_fragment_offset = Signal(intbv(0)[13:])
input_ip_ttl = Signal(intbv(0)[8:])
input_ip_protocol = Signal(intbv(0)[8:])
input_ip_source_ip = Signal(intbv(0)[32:])
input_ip_dest_ip = Signal(intbv(0)[32:])
input_ip_payload_tdata = Signal(intbv(0)[8:])
input_ip_payload_tvalid = Signal(bool(0))
input_ip_payload_tlast = Signal(bool(0))
input_ip_payload_tuser = Signal(bool(0))
output_eth_payload_tready = Signal(bool(0))
output_eth_hdr_ready = Signal(bool(0))
# Outputs
input_ip_hdr_ready = Signal(bool(0))
input_ip_payload_tready = Signal(bool(0))
output_eth_hdr_valid = Signal(bool(0))
output_eth_dest_mac = Signal(intbv(0)[48:])
output_eth_src_mac = Signal(intbv(0)[48:])
output_eth_type = Signal(intbv(0)[16:])
output_eth_payload_tdata = Signal(intbv(0)[8:])
output_eth_payload_tvalid = Signal(bool(0))
output_eth_payload_tlast = Signal(bool(0))
output_eth_payload_tuser = Signal(bool(0))
busy = Signal(bool(0))
error_payload_early_termination = Signal(bool(0))
# sources and sinks
source_queue = Queue()
source_pause = Signal(bool(0))
sink_queue = Queue()
sink_pause = Signal(bool(0))
source = ip_ep.IPFrameSource(clk,
rst,
ip_hdr_valid=input_ip_hdr_valid,
ip_hdr_ready=input_ip_hdr_ready,
eth_dest_mac=input_eth_dest_mac,
eth_src_mac=input_eth_src_mac,
eth_type=input_eth_type,
ip_dscp=input_ip_dscp,
ip_ecn=input_ip_ecn,
ip_length=input_ip_length,
ip_identification=input_ip_identification,
ip_flags=input_ip_flags,
ip_fragment_offset=input_ip_fragment_offset,
ip_ttl=input_ip_ttl,
ip_protocol=input_ip_protocol,
ip_source_ip=input_ip_source_ip,
ip_dest_ip=input_ip_dest_ip,
ip_payload_tdata=input_ip_payload_tdata,
ip_payload_tvalid=input_ip_payload_tvalid,
ip_payload_tready=input_ip_payload_tready,
ip_payload_tlast=input_ip_payload_tlast,
ip_payload_tuser=input_ip_payload_tuser,
fifo=source_queue,
pause=source_pause,
name='source')
sink = eth_ep.EthFrameSink(clk,
rst,
eth_hdr_ready=output_eth_hdr_ready,
eth_hdr_valid=output_eth_hdr_valid,
eth_dest_mac=output_eth_dest_mac,
eth_src_mac=output_eth_src_mac,
eth_type=output_eth_type,
eth_payload_tdata=output_eth_payload_tdata,
eth_payload_tvalid=output_eth_payload_tvalid,
eth_payload_tready=output_eth_payload_tready,
eth_payload_tlast=output_eth_payload_tlast,
eth_payload_tuser=output_eth_payload_tuser,
fifo=sink_queue,
pause=sink_pause,
name='sink')
# DUT
dut = dut_ip_eth_tx(clk,
rst,
current_test,
input_ip_hdr_valid,
input_ip_hdr_ready,
input_eth_dest_mac,
input_eth_src_mac,
input_eth_type,
input_ip_dscp,
input_ip_ecn,
input_ip_length,
input_ip_identification,
input_ip_flags,
input_ip_fragment_offset,
input_ip_ttl,
input_ip_protocol,
input_ip_source_ip,
input_ip_dest_ip,
input_ip_payload_tdata,
input_ip_payload_tvalid,
input_ip_payload_tready,
input_ip_payload_tlast,
input_ip_payload_tuser,
output_eth_hdr_valid,
output_eth_hdr_ready,
output_eth_dest_mac,
output_eth_src_mac,
output_eth_type,
output_eth_payload_tdata,
output_eth_payload_tvalid,
output_eth_payload_tready,
output_eth_payload_tlast,
output_eth_payload_tuser,
busy,
error_payload_early_termination)
@always(delay(4))
def clkgen():
clk.next = not clk
@instance
def check():
yield delay(100)
yield clk.posedge
rst.next = 1
yield clk.posedge
rst.next = 0
yield clk.posedge
yield delay(100)
yield clk.posedge
output_eth_hdr_ready.next = True
yield clk.posedge
yield clk.posedge
print("test 1: test packet")
current_test.next = 1
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
source_queue.put(test_frame)
yield clk.posedge
yield output_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame
yield delay(100)
yield clk.posedge
print("test 2: longer packet")
current_test.next = 2
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = bytearray(range(256))
test_frame.build()
source_queue.put(test_frame)
yield clk.posedge
yield output_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame
yield delay(100)
yield clk.posedge
print("test 3: test packet with pauses")
current_test.next = 3
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = bytearray(range(256))
test_frame.build()
source_queue.put(test_frame)
yield clk.posedge
yield delay(64)
yield clk.posedge
source_pause.next = True
yield delay(32)
yield clk.posedge
source_pause.next = False
yield delay(64)
yield clk.posedge
sink_pause.next = True
yield delay(32)
yield clk.posedge
sink_pause.next = False
yield output_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame
yield delay(100)
yield clk.posedge
print("test 4: back-to-back packets")
current_test.next = 4
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame2.build()
source_queue.put(test_frame1)
source_queue.put(test_frame2)
yield clk.posedge
yield output_eth_payload_tlast.posedge
yield clk.posedge
yield output_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 5: alternate pause source")
current_test.next = 5
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = bytearray(range(32))
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = bytearray(range(32))
test_frame2.build()
source_queue.put(test_frame1)
source_queue.put(test_frame2)
yield clk.posedge
yield clk.posedge
while input_ip_payload_tvalid or output_eth_payload_tvalid:
source_pause.next = True
yield clk.posedge
yield clk.posedge
yield clk.posedge
source_pause.next = False
yield clk.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 6: alternate pause sink")
current_test.next = 6
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = bytearray(range(32))
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = bytearray(range(32))
test_frame2.build()
source_queue.put(test_frame1)
source_queue.put(test_frame2)
yield clk.posedge
yield clk.posedge
while input_ip_payload_tvalid or output_eth_payload_tvalid:
sink_pause.next = True
yield clk.posedge
yield clk.posedge
yield clk.posedge
sink_pause.next = False
yield clk.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 7: alternate pause source 2")
current_test.next = 7
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = bytearray(range(33))
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = bytearray(range(33))
test_frame2.build()
source_queue.put(test_frame1)
source_queue.put(test_frame2)
yield clk.posedge
yield clk.posedge
while input_ip_payload_tvalid or output_eth_payload_tvalid:
source_pause.next = True
yield clk.posedge
yield clk.posedge
yield clk.posedge
source_pause.next = False
yield clk.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 8: alternate pause sink 2")
current_test.next = 8
test_frame1 = ip_ep.IPFrame()
test_frame1.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame1.eth_src_mac = 0x5A5152535455
test_frame1.eth_type = 0x0800
test_frame1.ip_version = 4
test_frame1.ip_ihl = 5
test_frame1.ip_length = None
test_frame1.ip_identification = 0
test_frame1.ip_flags = 2
test_frame1.ip_fragment_offset = 0
test_frame1.ip_ttl = 64
test_frame1.ip_protocol = 0x11
test_frame1.ip_header_checksum = None
test_frame1.ip_source_ip = 0xc0a80164
test_frame1.ip_dest_ip = 0xc0a80165
test_frame1.payload = bytearray(range(33))
test_frame1.build()
test_frame2 = ip_ep.IPFrame()
test_frame2.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame2.eth_src_mac = 0x5A5152535455
test_frame2.eth_type = 0x0800
test_frame2.ip_version = 4
test_frame2.ip_ihl = 5
test_frame2.ip_length = None
test_frame2.ip_identification = 0
test_frame2.ip_flags = 2
test_frame2.ip_fragment_offset = 0
test_frame2.ip_ttl = 64
test_frame2.ip_protocol = 0x11
test_frame2.ip_header_checksum = None
test_frame2.ip_source_ip = 0xc0a80164
test_frame2.ip_dest_ip = 0xc0a80165
test_frame2.payload = bytearray(range(33))
test_frame2.build()
source_queue.put(test_frame1)
source_queue.put(test_frame2)
yield clk.posedge
yield clk.posedge
while input_ip_payload_tvalid or output_eth_payload_tvalid:
sink_pause.next = True
yield clk.posedge
yield clk.posedge
yield clk.posedge
sink_pause.next = False
yield clk.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame1
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame2
yield delay(100)
yield clk.posedge
print("test 9: tuser assert")
current_test.next = 9
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.payload.user = 1
test_frame.build()
source_queue.put(test_frame)
yield clk.posedge
yield output_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame
assert rx_frame.payload.user[-1]
yield delay(100)
yield clk.posedge
print("test 10: trailing bytes")
current_test.next = 10
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
test_frame2 = ip_ep.IPFrame(test_frame)
test_frame2.payload.data += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
source_queue.put(test_frame2)
yield clk.posedge
yield output_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame
yield clk.posedge
print("test 11: trailing bytes with tuser assert")
current_test.next = 11
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = None
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C'
test_frame.build()
test_frame2 = ip_ep.IPFrame(test_frame)
test_frame2.payload.data += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
test_frame2.payload.user = 1
source_queue.put(test_frame2)
yield clk.posedge
yield output_eth_payload_tlast.posedge
yield clk.posedge
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame == test_frame
assert rx_frame.payload.user[-1]
yield delay(100)
yield clk.posedge
print("test 13: truncated payload")
current_test.next = 13
test_frame = ip_ep.IPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0800
test_frame.ip_version = 4
test_frame.ip_ihl = 5
test_frame.ip_length = 32
test_frame.ip_identification = 0
test_frame.ip_flags = 2
test_frame.ip_fragment_offset = 0
test_frame.ip_ttl = 64
test_frame.ip_protocol = 0x11
test_frame.ip_header_checksum = None
test_frame.ip_source_ip = 0xc0a80164
test_frame.ip_dest_ip = 0xc0a80165
test_frame.payload = '\x01\x02'
test_frame.build()
source_queue.put(test_frame)
yield clk.posedge
yield output_eth_payload_tlast.posedge
yield clk.posedge
assert error_payload_early_termination
yield clk.posedge
rx_frame = None
if not sink_queue.empty():
rx_frame = sink_queue.get()
check_frame = ip_ep.IPFrame()
check_frame.parse_eth(rx_frame)
#assert check_frame == test_frame
assert rx_frame.payload.user[-1]
yield delay(100)
raise StopSimulation
return dut, source, sink, clkgen, check
def test_bench():
sim = Simulation(bench())
sim.run()
if __name__ == '__main__':
print("Running test...")
test_bench()

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tb/test_ip_eth_tx.v Normal file
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@ -0,0 +1,155 @@
/*
Copyright (c) 2014 Alex Forencich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
// Language: Verilog 2001
`timescale 1 ns / 1 ps
module test_ip_eth_tx;
// Inputs
reg clk = 0;
reg rst = 0;
reg [7:0] current_test = 0;
reg input_ip_hdr_valid = 0;
reg [47:0] input_eth_dest_mac = 0;
reg [47:0] input_eth_src_mac = 0;
reg [15:0] input_eth_type = 0;
reg [5:0] input_ip_dscp = 0;
reg [1:0] input_ip_ecn = 0;
reg [15:0] input_ip_length = 0;
reg [15:0] input_ip_identification = 0;
reg [2:0] input_ip_flags = 0;
reg [12:0] input_ip_fragment_offset = 0;
reg [7:0] input_ip_ttl = 0;
reg [7:0] input_ip_protocol = 0;
reg [31:0] input_ip_source_ip = 0;
reg [31:0] input_ip_dest_ip = 0;
reg [7:0] input_ip_payload_tdata = 0;
reg input_ip_payload_tvalid = 0;
reg input_ip_payload_tlast = 0;
reg input_ip_payload_tuser = 0;
reg output_eth_hdr_ready = 0;
reg output_eth_payload_tready = 0;
// Outputs
wire input_ip_hdr_ready;
wire input_ip_payload_tready;
wire output_eth_hdr_valid;
wire [47:0] output_eth_dest_mac;
wire [47:0] output_eth_src_mac;
wire [15:0] output_eth_type;
wire [7:0] output_eth_payload_tdata;
wire output_eth_payload_tvalid;
wire output_eth_payload_tlast;
wire output_eth_payload_tuser;
wire busy;
wire error_payload_early_termination;
initial begin
// myhdl integration
$from_myhdl(clk,
rst,
current_test,
input_ip_hdr_valid,
input_eth_dest_mac,
input_eth_src_mac,
input_eth_type,
input_ip_dscp,
input_ip_ecn,
input_ip_length,
input_ip_identification,
input_ip_flags,
input_ip_fragment_offset,
input_ip_ttl,
input_ip_protocol,
input_ip_source_ip,
input_ip_dest_ip,
input_ip_payload_tdata,
input_ip_payload_tvalid,
input_ip_payload_tlast,
input_ip_payload_tuser,
output_eth_hdr_ready,
output_eth_payload_tready);
$to_myhdl(input_ip_hdr_ready,
input_ip_payload_tready,
output_eth_hdr_valid,
output_eth_dest_mac,
output_eth_src_mac,
output_eth_type,
output_eth_payload_tdata,
output_eth_payload_tvalid,
output_eth_payload_tlast,
output_eth_payload_tuser,
busy,
error_payload_early_termination);
// dump file
$dumpfile("test_ip_eth_tx.lxt");
$dumpvars(0, test_ip_eth_tx);
end
ip_eth_tx
UUT (
.clk(clk),
.rst(rst),
// IP frame input
.input_ip_hdr_valid(input_ip_hdr_valid),
.input_ip_hdr_ready(input_ip_hdr_ready),
.input_eth_dest_mac(input_eth_dest_mac),
.input_eth_src_mac(input_eth_src_mac),
.input_eth_type(input_eth_type),
.input_ip_dscp(input_ip_dscp),
.input_ip_ecn(input_ip_ecn),
.input_ip_length(input_ip_length),
.input_ip_identification(input_ip_identification),
.input_ip_flags(input_ip_flags),
.input_ip_fragment_offset(input_ip_fragment_offset),
.input_ip_ttl(input_ip_ttl),
.input_ip_protocol(input_ip_protocol),
.input_ip_source_ip(input_ip_source_ip),
.input_ip_dest_ip(input_ip_dest_ip),
.input_ip_payload_tdata(input_ip_payload_tdata),
.input_ip_payload_tvalid(input_ip_payload_tvalid),
.input_ip_payload_tready(input_ip_payload_tready),
.input_ip_payload_tlast(input_ip_payload_tlast),
.input_ip_payload_tuser(input_ip_payload_tuser),
// Ethernet frame output
.output_eth_hdr_valid(output_eth_hdr_valid),
.output_eth_hdr_ready(output_eth_hdr_ready),
.output_eth_dest_mac(output_eth_dest_mac),
.output_eth_src_mac(output_eth_src_mac),
.output_eth_type(output_eth_type),
.output_eth_payload_tdata(output_eth_payload_tdata),
.output_eth_payload_tvalid(output_eth_payload_tvalid),
.output_eth_payload_tready(output_eth_payload_tready),
.output_eth_payload_tlast(output_eth_payload_tlast),
.output_eth_payload_tuser(output_eth_payload_tuser),
// Status signals
.busy(busy),
.error_payload_early_termination(error_payload_early_termination)
);
endmodule