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corundum/tb/test_arp.py
Alex Forencich 2e9602b5b4 Update testbenches to use wait
2018-07-02 18:20:07 -07:00

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#!/usr/bin/env python
"""
Copyright (c) 2014-2018 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
import axis_ep
import eth_ep
import arp_ep
module = 'arp'
testbench = 'test_%s' % module
srcs = []
srcs.append("../rtl/%s.v" % module)
srcs.append("../rtl/lfsr.v")
srcs.append("../rtl/arp_cache.v")
srcs.append("../rtl/arp_eth_rx.v")
srcs.append("../rtl/arp_eth_tx.v")
srcs.append("%s.v" % testbench)
src = ' '.join(srcs)
build_cmd = "iverilog -o %s.vvp %s" % (testbench, src)
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_eth_payload_tready = Signal(bool(0))
output_eth_hdr_ready = Signal(bool(0))
arp_request_valid = Signal(bool(0))
arp_request_ip = Signal(intbv(0)[32:])
arp_response_ready = Signal(bool(0))
local_mac = Signal(intbv(0)[48:])
local_ip = Signal(intbv(0)[32:])
gateway_ip = Signal(intbv(0)[32:])
subnet_mask = Signal(intbv(0)[32:])
clear_cache = Signal(bool(0))
# Outputs
input_eth_hdr_ready = Signal(bool(0))
input_eth_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))
arp_request_ready = Signal(bool(0))
arp_response_valid = Signal(bool(0))
arp_response_error = Signal(bool(0))
arp_response_mac = Signal(intbv(0)[48:])
# sources and sinks
eth_source_pause = Signal(bool(0))
eth_sink_pause = Signal(bool(0))
eth_source = eth_ep.EthFrameSource()
eth_source_logic = eth_source.create_logic(
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,
pause=eth_source_pause,
name='eth_source'
)
eth_sink = eth_ep.EthFrameSink()
eth_sink_logic = eth_sink.create_logic(
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,
pause=eth_sink_pause,
name='eth_sink'
)
arp_request_source = axis_ep.AXIStreamSource()
arp_request_source_logic = arp_request_source.create_logic(
clk,
rst,
tdata=(arp_request_ip,),
tvalid=arp_request_valid,
tready=arp_request_ready,
name='arp_request_source'
)
arp_response_sink = axis_ep.AXIStreamSink()
arp_response_sink_logic = arp_response_sink.create_logic(
clk,
rst,
tdata=(arp_response_error, arp_response_mac),
tvalid=arp_response_valid,
tready=arp_response_ready,
name='arp_response_sink'
)
# DUT
if os.system(build_cmd):
raise Exception("Error running build command")
dut = Cosimulation(
"vvp -m myhdl %s.vvp -lxt2" % testbench,
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_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,
arp_request_valid=arp_request_valid,
arp_request_ready=arp_request_ready,
arp_request_ip=arp_request_ip,
arp_response_valid=arp_response_valid,
arp_response_ready=arp_response_ready,
arp_response_error=arp_response_error,
arp_response_mac=arp_response_mac,
local_mac=local_mac,
local_ip=local_ip,
gateway_ip=gateway_ip,
subnet_mask=subnet_mask,
clear_cache=clear_cache
)
@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
local_mac.next = 0xDAD1D2D3D4D5
local_ip.next = 0xc0a80165
gateway_ip.next = 0xc0a80101
subnet_mask.next = 0xFFFFFF00
yield clk.posedge
print("test 1: ARP request")
current_test.next = 1
test_frame = arp_ep.ARPFrame()
test_frame.eth_dest_mac = 0xFFFFFFFFFFFF
test_frame.eth_src_mac = 0x5A5152535455
test_frame.eth_type = 0x0806
test_frame.arp_htype = 0x0001
test_frame.arp_ptype = 0x0800
test_frame.arp_hlen = 6
test_frame.arp_plen = 4
test_frame.arp_oper = 1
test_frame.arp_sha = 0x5A5152535455
test_frame.arp_spa = 0xc0a80164
test_frame.arp_tha = 0x000000000000
test_frame.arp_tpa = 0xc0a80165
eth_source.send(test_frame.build_eth())
yield eth_sink.wait()
rx_frame = eth_sink.recv()
check_frame = arp_ep.ARPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame.eth_dest_mac == 0x5A5152535455
assert check_frame.eth_src_mac == 0xDAD1D2D3D4D5
assert check_frame.eth_type == 0x0806
assert check_frame.arp_htype == 0x0001
assert check_frame.arp_ptype == 0x0800
assert check_frame.arp_hlen == 6
assert check_frame.arp_plen == 4
assert check_frame.arp_oper == 2
assert check_frame.arp_sha == 0xDAD1D2D3D4D5
assert check_frame.arp_spa == 0xc0a80165
assert check_frame.arp_tha == 0x5A5152535455
assert check_frame.arp_tpa == 0xc0a80164
yield delay(100)
yield clk.posedge
print("test 2: Cached read")
current_test.next = 2
arp_request_source.send([(0xc0a80164,)])
yield arp_response_sink.wait()
err, mac = arp_response_sink.recv().data[0]
assert not err
assert mac == 0x5A5152535455
yield delay(100)
yield clk.posedge
print("test 3: Unached read")
current_test.next = 3
arp_request_source.send([(0xc0a80166,)])
# wait for ARP request packet
yield eth_sink.wait()
rx_frame = eth_sink.recv()
check_frame = arp_ep.ARPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame.eth_dest_mac == 0xFFFFFFFFFFFF
assert check_frame.eth_src_mac == 0xDAD1D2D3D4D5
assert check_frame.eth_type == 0x0806
assert check_frame.arp_htype == 0x0001
assert check_frame.arp_ptype == 0x0800
assert check_frame.arp_hlen == 6
assert check_frame.arp_plen == 4
assert check_frame.arp_oper == 1
assert check_frame.arp_sha == 0xDAD1D2D3D4D5
assert check_frame.arp_spa == 0xc0a80165
assert check_frame.arp_tha == 0x000000000000
assert check_frame.arp_tpa == 0xc0a80166
# generate response
test_frame = arp_ep.ARPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0x6A6162636465
test_frame.eth_type = 0x0806
test_frame.arp_htype = 0x0001
test_frame.arp_ptype = 0x0800
test_frame.arp_hlen = 6
test_frame.arp_plen = 4
test_frame.arp_oper = 2
test_frame.arp_sha = 0x6A6162636465
test_frame.arp_spa = 0xc0a80166
test_frame.arp_tha = 0xDAD1D2D3D4D5
test_frame.arp_tpa = 0xc0a80165
eth_source.send(test_frame.build_eth())
# wait for lookup
yield arp_response_sink.wait()
err, mac = arp_response_sink.recv().data[0]
assert not err
assert mac == 0x6A6162636465
yield delay(100)
yield clk.posedge
print("test 4: Unached read, outside of subnet")
current_test.next = 4
arp_request_source.send([(0x08080808,)])
# wait for ARP request packet
yield eth_sink.wait()
rx_frame = eth_sink.recv()
check_frame = arp_ep.ARPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame.eth_dest_mac == 0xFFFFFFFFFFFF
assert check_frame.eth_src_mac == 0xDAD1D2D3D4D5
assert check_frame.eth_type == 0x0806
assert check_frame.arp_htype == 0x0001
assert check_frame.arp_ptype == 0x0800
assert check_frame.arp_hlen == 6
assert check_frame.arp_plen == 4
assert check_frame.arp_oper == 1
assert check_frame.arp_sha == 0xDAD1D2D3D4D5
assert check_frame.arp_spa == 0xc0a80165
assert check_frame.arp_tha == 0x000000000000
assert check_frame.arp_tpa == 0xc0a80101
# generate response
test_frame = arp_ep.ARPFrame()
test_frame.eth_dest_mac = 0xDAD1D2D3D4D5
test_frame.eth_src_mac = 0xAABBCCDDEEFF
test_frame.eth_type = 0x0806
test_frame.arp_htype = 0x0001
test_frame.arp_ptype = 0x0800
test_frame.arp_hlen = 6
test_frame.arp_plen = 4
test_frame.arp_oper = 2
test_frame.arp_sha = 0xAABBCCDDEEFF
test_frame.arp_spa = 0xc0a80101
test_frame.arp_tha = 0xDAD1D2D3D4D5
test_frame.arp_tpa = 0xc0a80165
eth_source.send(test_frame.build_eth())
# wait for lookup
yield arp_response_sink.wait()
err, mac = arp_response_sink.recv().data[0]
assert not err
assert mac == 0xAABBCCDDEEFF
yield delay(100)
yield clk.posedge
print("test 5: Unached read, timeout")
current_test.next = 5
arp_request_source.send([(0xc0a80167,)])
yield arp_response_sink.wait()
err, mac = arp_response_sink.recv().data[0]
assert err
# check for 4 ARP requests
assert eth_sink.count() == 4
while not eth_sink.empty():
rx_frame = eth_sink.recv()
check_frame = arp_ep.ARPFrame()
check_frame.parse_eth(rx_frame)
assert check_frame.eth_dest_mac == 0xFFFFFFFFFFFF
assert check_frame.eth_src_mac == 0xDAD1D2D3D4D5
assert check_frame.eth_type == 0x0806
assert check_frame.arp_htype == 0x0001
assert check_frame.arp_ptype == 0x0800
assert check_frame.arp_hlen == 6
assert check_frame.arp_plen == 4
assert check_frame.arp_oper == 1
assert check_frame.arp_sha == 0xDAD1D2D3D4D5
assert check_frame.arp_spa == 0xc0a80165
assert check_frame.arp_tha == 0x000000000000
assert check_frame.arp_tpa == 0xc0a80167
yield delay(100)
yield clk.posedge
print("test 6: Broadcast")
current_test.next = 6
# subnet broadcast
arp_request_source.send([(0xc0a801ff,)])
yield arp_response_sink.wait()
err, mac = arp_response_sink.recv().data[0]
assert not err
assert mac == 0xffffffffffff
# general broadcast
arp_request_source.send([(0xffffffff,)])
yield arp_response_sink.wait()
err, mac = arp_response_sink.recv().data[0]
assert not err
assert mac == 0xffffffffffff
yield delay(100)
raise StopSimulation
return instances()
def test_bench():
sim = Simulation(bench())
sim.run()
if __name__ == '__main__':
print("Running test...")
test_bench()
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