example/fb2CG: Add example design for fb2CG@KU15P

Signed-off-by: Alex Forencich <alex@alexforencich.com>

example/fb2CG/fpga/tb/fpga_core/Makefile

@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: MIT
+#
+# Copyright (c) 2020-2025 FPGA Ninja, LLC
+#
+# Authors:
+# - Alex Forencich
+
+TOPLEVEL_LANG = verilog
+
+SIM ?= verilator
+WAVES ?= 0
+
+COCOTB_HDL_TIMEUNIT = 1ns
+COCOTB_HDL_TIMEPRECISION = 1ps
+
+DUT      = fpga_core
+COCOTB_TEST_MODULES = test_$(DUT)
+COCOTB_TOPLEVEL     = $(DUT)
+MODULE   = $(COCOTB_TEST_MODULES)
+TOPLEVEL = $(COCOTB_TOPLEVEL)
+VERILOG_SOURCES += ../../rtl/$(DUT).sv
+VERILOG_SOURCES += ../../lib/taxi/rtl/eth/us/taxi_eth_mac_25g_us.f
+VERILOG_SOURCES += ../../lib/taxi/rtl/axis/taxi_axis_async_fifo.f
+VERILOG_SOURCES += ../../lib/taxi/rtl/sync/taxi_sync_reset.sv
+VERILOG_SOURCES += ../../lib/taxi/rtl/sync/taxi_sync_signal.sv
+VERILOG_SOURCES += ../../lib/taxi/rtl/io/taxi_led_sreg.sv
+
+# handle file list files
+process_f_file = $(call process_f_files,$(addprefix $(dir $1),$(shell cat $1)))
+process_f_files = $(foreach f,$1,$(if $(filter %.f,$f),$(call process_f_file,$f),$f))
+uniq_base = $(if $1,$(call uniq_base,$(foreach f,$1,$(if $(filter-out $(notdir $(lastword $1)),$(notdir $f)),$f,))) $(lastword $1))
+VERILOG_SOURCES := $(call uniq_base,$(call process_f_files,$(VERILOG_SOURCES)))
+
+# module parameters
+export PARAM_SIM := "1'b1"
+export PARAM_VENDOR := "\"XILINX\""
+export PARAM_FAMILY := "\"kintexuplus\""
+
+ifeq ($(SIM), icarus)
+	PLUSARGS += -fst
+
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-P $(COCOTB_TOPLEVEL).$(subst PARAM_,,$(v))=$($(v)))
+else ifeq ($(SIM), verilator)
+	COMPILE_ARGS += $(foreach v,$(filter PARAM_%,$(.VARIABLES)),-G$(subst PARAM_,,$(v))=$($(v)))
+
+	ifeq ($(WAVES), 1)
+		COMPILE_ARGS += --trace-fst
+		VERILATOR_TRACE = 1
+	endif
+endif
+
+include $(shell cocotb-config --makefiles)/Makefile.sim

example/fb2CG/fpga/tb/fpga_core/baser.py

@@ -0,0 +1 @@
+../../lib/taxi/tb/eth/baser.py

example/fb2CG/fpga/tb/fpga_core/test_fpga_core.py

@@ -0,0 +1,198 @@
+#!/usr/bin/env python
+# SPDX-License-Identifier: MIT
+"""
+
+Copyright (c) 2020-2025 FPGA Ninja, LLC
+
+Authors:
+- Alex Forencich
+
+"""
+
+import logging
+import os
+import sys
+
+import cocotb_test.simulator
+
+import cocotb
+from cocotb.log import SimLog
+from cocotb.clock import Clock
+from cocotb.triggers import RisingEdge, Combine
+
+from cocotbext.eth import XgmiiFrame
+
+try:
+    from baser import BaseRSerdesSource, BaseRSerdesSink
+except ImportError:
+    # attempt import from current directory
+    sys.path.insert(0, os.path.join(os.path.dirname(__file__)))
+    try:
+        from baser import BaseRSerdesSource, BaseRSerdesSink
+    finally:
+        del sys.path[0]
+
+
+class TB:
+    def __init__(self, dut):
+        self.dut = dut
+
+        self.log = SimLog("cocotb.tb")
+        self.log.setLevel(logging.DEBUG)
+
+        cocotb.start_soon(Clock(dut.clk_125mhz, 8, units="ns").start())
+        cocotb.start_soon(Clock(dut.qsfp_0_mgt_refclk_p, 6.206, units="ns").start())
+        cocotb.start_soon(Clock(dut.qsfp_1_mgt_refclk_p, 6.206, units="ns").start())
+
+        self.qsfp_sources = []
+        self.qsfp_sinks = []
+
+        for inst in dut.gty_quad:
+            for ch in inst.mac_inst.ch:
+                cocotb.start_soon(Clock(ch.ch_inst.tx_clk, 2.56, units="ns").start())
+                cocotb.start_soon(Clock(ch.ch_inst.rx_clk, 2.56, units="ns").start())
+
+                self.qsfp_sources.append(BaseRSerdesSource(ch.ch_inst.serdes_rx_data, ch.ch_inst.serdes_rx_hdr, ch.ch_inst.rx_clk, slip=ch.ch_inst.serdes_rx_bitslip, reverse=True))
+                self.qsfp_sinks.append(BaseRSerdesSink(ch.ch_inst.serdes_tx_data, ch.ch_inst.serdes_tx_hdr, ch.ch_inst.tx_clk, reverse=True))
+
+        dut.qsfp_0_mod_prsnt_n.setimmediatevalue(0)
+        dut.qsfp_0_intr_n.setimmediatevalue(0)
+        dut.qsfp_1_mod_prsnt_n.setimmediatevalue(0)
+        dut.qsfp_1_intr_n.setimmediatevalue(0)
+
+    async def init(self):
+
+        self.dut.rst_125mhz.setimmediatevalue(0)
+
+        for k in range(10):
+            await RisingEdge(self.dut.clk_125mhz)
+
+        self.dut.rst_125mhz.value = 1
+
+        for k in range(10):
+            await RisingEdge(self.dut.clk_125mhz)
+
+        self.dut.rst_125mhz.value = 0
+
+        for k in range(10):
+            await RisingEdge(self.dut.clk_125mhz)
+
+
+async def mac_test(tb, source, sink):
+    tb.log.info("Test MAC")
+
+    tb.log.info("Multiple small packets")
+
+    count = 64
+
+    pkts = [bytearray([(x+k) % 256 for x in range(60)]) for k in range(count)]
+
+    for p in pkts:
+        await source.send(XgmiiFrame.from_payload(p))
+
+    for k in range(count):
+        rx_frame = await sink.recv()
+
+        tb.log.info("RX frame: %s", rx_frame)
+
+        assert rx_frame.get_payload() == pkts[k]
+        assert rx_frame.check_fcs()
+
+    tb.log.info("Multiple large packets")
+
+    count = 32
+
+    pkts = [bytearray([(x+k) % 256 for x in range(1514)]) for k in range(count)]
+
+    for p in pkts:
+        await source.send(XgmiiFrame.from_payload(p))
+
+    for k in range(count):
+        rx_frame = await sink.recv()
+
+        tb.log.info("RX frame: %s", rx_frame)
+
+        assert rx_frame.get_payload() == pkts[k]
+        assert rx_frame.check_fcs()
+
+    tb.log.info("MAC test done")
+
+
+@cocotb.test()
+async def run_test(dut):
+
+    tb = TB(dut)
+
+    await tb.init()
+
+    tests = []
+
+    for k in range(len(tb.qsfp_sources)):
+        tb.log.info("Start QSFP %d MAC loopback test", k)
+
+        tests.append(cocotb.start_soon(mac_test(tb, tb.qsfp_sources[k], tb.qsfp_sinks[k])))
+
+    await Combine(*tests)
+
+    await RisingEdge(dut.clk_125mhz)
+    await RisingEdge(dut.clk_125mhz)
+
+
+# cocotb-test
+
+tests_dir = os.path.abspath(os.path.dirname(__file__))
+rtl_dir = os.path.abspath(os.path.join(tests_dir, '..', '..', 'rtl'))
+lib_dir = os.path.abspath(os.path.join(rtl_dir, '..', 'lib'))
+
+
+def process_f_files(files):
+    lst = {}
+    for f in files:
+        if f[-2:].lower() == '.f':
+            with open(f, 'r') as fp:
+                l = fp.read().split()
+            for f in process_f_files([os.path.join(os.path.dirname(f), x) for x in l]):
+                lst[os.path.basename(f)] = f
+        else:
+            lst[os.path.basename(f)] = f
+    return list(lst.values())
+
+
+def test_fpga_core(request):
+    dut = "fpga_core"
+    module = os.path.splitext(os.path.basename(__file__))[0]
+    toplevel = dut
+
+    verilog_sources = [
+        os.path.join(rtl_dir, f"{dut}.sv"),
+        os.path.join(lib_dir, "taxi", "rtl", "eth", "us", "taxi_eth_mac_25g_us.f"),
+        os.path.join(lib_dir, "taxi", "rtl", "axis", "taxi_axis_async_fifo.f"),
+        os.path.join(lib_dir, "taxi", "rtl", "sync", "taxi_sync_reset.sv"),
+        os.path.join(lib_dir, "taxi", "rtl", "sync", "taxi_sync_signal.sv"),
+        os.path.join(lib_dir, "taxi", "rtl", "io", "taxi_debounce_switch.sv"),
+        os.path.join(lib_dir, "taxi", "rtl", "io", "taxi_led_sreg.sv"),
+    ]
+
+    verilog_sources = process_f_files(verilog_sources)
+
+    parameters = {}
+
+    parameters['SIM'] = "1'b1"
+    parameters['VENDOR'] = "\"XILINX\""
+    parameters['FAMILY'] = "\"kintexuplus\""
+
+    extra_env = {f'PARAM_{k}': str(v) for k, v in parameters.items()}
+
+    sim_build = os.path.join(tests_dir, "sim_build",
+        request.node.name.replace('[', '-').replace(']', ''))
+
+    cocotb_test.simulator.run(
+        simulator="verilator",
+        python_search=[tests_dir],
+        verilog_sources=verilog_sources,
+        toplevel=toplevel,
+        module=module,
+        parameters=parameters,
+        sim_build=sim_build,
+        extra_env=extra_env,
+    )