#!/usr/bin/env python """ Copyright (c) 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 xgmii_ep import baser_serdes_ep module = 'eth_phy_10g_rx' testbench = 'test_%s_64' % module srcs = [] srcs.append("../rtl/%s.v" % module) srcs.append("../rtl/eth_phy_10g_rx_ber_mon.v") srcs.append("../rtl/eth_phy_10g_rx_frame_sync.v") srcs.append("../rtl/xgmii_baser_dec_64.v") srcs.append("../rtl/lfsr.v") srcs.append("%s.v" % testbench) src = ' '.join(srcs) build_cmd = "iverilog -o %s.vvp %s" % (testbench, src) def bench(): # Parameters DATA_WIDTH = 64 CTRL_WIDTH = (DATA_WIDTH/8) HDR_WIDTH = 2 BIT_REVERSE = 0 SCRAMBLER_DISABLE = 0 COUNT_125US = 1250/6.4 # Inputs clk = Signal(bool(0)) rst = Signal(bool(0)) current_test = Signal(intbv(0)[8:]) serdes_rx_data = Signal(intbv(0)[DATA_WIDTH:]) serdes_rx_hdr = Signal(intbv(1)[HDR_WIDTH:]) serdes_rx_data_int = Signal(intbv(0)[DATA_WIDTH:]) serdes_rx_hdr_int = Signal(intbv(1)[HDR_WIDTH:]) # Outputs xgmii_rxd = Signal(intbv(0)[DATA_WIDTH:]) xgmii_rxc = Signal(intbv(0)[CTRL_WIDTH:]) serdes_rx_bitslip = Signal(bool(0)) rx_block_lock = Signal(bool(0)) rx_high_ber = Signal(bool(0)) # sources and sinks source = baser_serdes_ep.BaseRSerdesSource() source_logic = source.create_logic( clk, tx_data=serdes_rx_data_int, tx_header=serdes_rx_hdr_int, name='source' ) sink = xgmii_ep.XGMIISink() sink_logic = sink.create_logic( clk, rst, rxd=xgmii_rxd, rxc=xgmii_rxc, name='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, xgmii_rxd=xgmii_rxd, xgmii_rxc=xgmii_rxc, serdes_rx_data=serdes_rx_data, serdes_rx_hdr=serdes_rx_hdr, serdes_rx_bitslip=serdes_rx_bitslip, rx_block_lock=rx_block_lock, rx_high_ber=rx_high_ber ) @always(delay(4)) def clkgen(): clk.next = not clk load_bit_offset = [] @instance def shift_bits(): bit_offset = 0 last_data = 0 while True: yield clk.posedge if load_bit_offset: bit_offset = load_bit_offset.pop(0) if serdes_rx_bitslip: bit_offset += 1 bit_offset = bit_offset % 66 data = int(serdes_rx_data_int) << 2 | int(serdes_rx_hdr_int) out_data = ((last_data | data << 66) >> 66-bit_offset) & 0x3ffffffffffffffff last_data = data serdes_rx_data.next = out_data >> 2 serdes_rx_hdr.next = out_data & 3 @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 # testbench stimulus for payload_len in list(range(16,34)): yield clk.posedge print("test 1: test packet, length %d" % payload_len) current_test.next = 1 test_frame = bytearray(range(payload_len)) xgmii_frame = xgmii_ep.XGMIIFrame(b'\x55\x55\x55\x55\x55\x55\x55\xD5'+test_frame) source.send(xgmii_frame) yield sink.wait() rx_frame = sink.recv() assert rx_frame.data == xgmii_frame.data assert sink.empty() yield delay(100) yield clk.posedge print("test 2: back-to-back packets, length %d" % payload_len) current_test.next = 2 test_frame1 = bytearray(range(payload_len)) test_frame2 = bytearray(range(payload_len)) xgmii_frame1 = xgmii_ep.XGMIIFrame(b'\x55\x55\x55\x55\x55\x55\x55\xD5'+test_frame1) xgmii_frame2 = xgmii_ep.XGMIIFrame(b'\x55\x55\x55\x55\x55\x55\x55\xD5'+test_frame2) source.send(xgmii_frame1) source.send(xgmii_frame2) yield sink.wait() rx_frame = sink.recv() assert rx_frame.data == xgmii_frame1.data yield sink.wait() rx_frame = sink.recv() assert rx_frame.data == xgmii_frame2.data assert sink.empty() yield delay(100) yield clk.posedge print("test 3: errored frame, length %d" % payload_len) current_test.next = 3 test_frame1 = bytearray(range(payload_len)) test_frame2 = bytearray(range(payload_len)) xgmii_frame1 = xgmii_ep.XGMIIFrame(b'\x55\x55\x55\x55\x55\x55\x55\xD5'+test_frame1) xgmii_frame2 = xgmii_ep.XGMIIFrame(b'\x55\x55\x55\x55\x55\x55\x55\xD5'+test_frame2) xgmii_frame1.error = 1 source.send(xgmii_frame1) source.send(xgmii_frame2) yield sink.wait() rx_frame = sink.recv() #assert rx_frame.data == xgmii_frame1.data yield sink.wait() rx_frame = sink.recv() assert rx_frame.data == xgmii_frame2.data assert sink.empty() yield delay(100) yield clk.posedge print("test 4: test frame sync") current_test.next = 4 assert rx_block_lock load_bit_offset.append(33) yield delay(600) assert not rx_block_lock assert rx_high_ber yield delay(3000) assert rx_block_lock yield delay(2000) assert not rx_high_ber yield delay(100) raise StopSimulation return instances() def test_bench(): sim = Simulation(bench()) sim.run() if __name__ == '__main__': print("Running test...") test_bench()