mirror of
https://github.com/fpganinja/taxi.git
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350 lines
8.3 KiB
Python
350 lines
8.3 KiB
Python
#!/usr/bin/env python
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# SPDX-License-Identifier: CERN-OHL-S-2.0
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"""
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Copyright (c) 2021-2025 FPGA Ninja, LLC
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Authors:
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- Alex Forencich
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"""
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import itertools
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import logging
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import os
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import random
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import cocotb_test.simulator
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import cocotb
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from cocotb.clock import Clock
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from cocotb.queue import Queue
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from cocotb.triggers import RisingEdge, Timer
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from cocotb.regression import TestFactory
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from cocotbext.axi import AxiStreamBus, AxiStreamSink
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def str2int(s):
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return int.from_bytes(s.encode('utf-8'), 'big')
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class TB(object):
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def __init__(self, dut):
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self.dut = dut
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self.log = logging.getLogger("cocotb.tb")
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self.log.setLevel(logging.DEBUG)
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cocotb.start_soon(Clock(dut.clk, 10, units="ns").start())
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self.stat_sink = AxiStreamSink(AxiStreamBus.from_entity(dut.m_axis_stat), dut.clk, dut.rst)
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for k in range(len(dut.stat_inc)):
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dut.stat_inc[k].setimmediatevalue(0)
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dut.stat_valid[k].setimmediatevalue(0)
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dut.stat_str[k].setimmediatevalue(str2int(f"STR_{k}"))
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dut.gate.setimmediatevalue(1)
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dut.update.setimmediatevalue(0)
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def set_backpressure_generator(self, generator=None):
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if generator:
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self.stat_sink.set_pause_generator(generator())
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async def cycle_reset(self):
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self.dut.rst.setimmediatevalue(0)
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await RisingEdge(self.dut.clk)
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await RisingEdge(self.dut.clk)
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self.dut.rst.value = 1
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await RisingEdge(self.dut.clk)
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await RisingEdge(self.dut.clk)
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self.dut.rst.value = 0
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await RisingEdge(self.dut.clk)
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await RisingEdge(self.dut.clk)
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async def run_test_acc(dut, backpressure_inserter=None):
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tb = TB(dut)
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stat_count = len(dut.stat_valid)
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await tb.cycle_reset()
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tb.set_backpressure_generator(backpressure_inserter)
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for n in range(10):
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await RisingEdge(dut.clk)
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dut.stat_inc.value = [k for k in range(stat_count)]
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dut.stat_valid.value = [1]*stat_count
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await RisingEdge(dut.clk)
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dut.stat_inc.value = [0]*stat_count
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dut.stat_valid.value = [0]*stat_count
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await Timer(1000, 'ns')
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await Timer(1000, 'ns')
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data = [0]*stat_count
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while not tb.stat_sink.empty():
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stat = await tb.stat_sink.recv()
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if not stat.tuser:
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assert stat.tdata[0] != 0
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data[stat.tid] += stat.tdata[0]
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print(data)
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for n in range(stat_count):
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assert data[n] == n*10
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await RisingEdge(dut.clk)
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await RisingEdge(dut.clk)
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async def run_test_max(dut, backpressure_inserter=None):
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tb = TB(dut)
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stat_count = len(dut.stat_valid)
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stat_inc_width = len(dut.stat_inc[0])
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await tb.cycle_reset()
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tb.set_backpressure_generator(backpressure_inserter)
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dut.stat_inc.value = [2**stat_inc_width-1 for k in range(stat_count)]
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dut.stat_valid.value = [1]*stat_count
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for k in range(2048):
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await RisingEdge(dut.clk)
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dut.stat_inc.value = [0]*stat_count
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dut.stat_valid.value = [0]*stat_count
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await Timer(1000, 'ns')
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data = [0]*stat_count
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while not tb.stat_sink.empty():
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stat = await tb.stat_sink.recv()
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if not stat.tuser:
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assert stat.tdata[0] != 0
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data[stat.tid] += stat.tdata[0]
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print(data)
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for n in range(stat_count):
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assert data[n] == 2048*(2**stat_inc_width-1)
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await RisingEdge(dut.clk)
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await RisingEdge(dut.clk)
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async def run_test_str(dut, backpressure_inserter=None):
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tb = TB(dut)
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stat_count = len(dut.stat_valid)
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await tb.cycle_reset()
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tb.set_backpressure_generator(backpressure_inserter)
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strings = [bytearray() for x in range(stat_count)]
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done_cnt = 0
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while done_cnt < stat_count:
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stat = await tb.stat_sink.recv()
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print(stat)
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val = stat.tdata[0]
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index = stat.tid
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ptr = (val & 0x7)*2
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b = bytearray()
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for k in range(2):
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c = (val >> (k*6 + 4)) & 0x3f
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if c & 0x20:
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c = (c & 0x1f) | 0x40
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else:
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c = (c & 0x1f) | 0x20
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b.append(c)
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if len(strings[index]) == ptr:
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strings[index].extend(b)
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if ptr == 14:
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done_cnt += 1
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print(strings)
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for i, s in enumerate(strings):
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s = (s[0:8].strip() + b"." + s[8:].strip()).decode('ascii')
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print(s)
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assert s == f'BLK.STR_{i}'
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await RisingEdge(dut.clk)
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await RisingEdge(dut.clk)
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async def run_stress_test(dut, backpressure_inserter=None):
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tb = TB(dut)
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stat_count = len(dut.stat_valid)
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stat_inc_width = len(dut.stat_inc[0])
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await tb.cycle_reset()
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tb.set_backpressure_generator(backpressure_inserter)
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async def worker(num, queue_ref, queue_drive, count=1024):
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for k in range(count):
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count = random.randrange(1, 2**stat_inc_width)
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await queue_drive.put(count)
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await queue_ref.put((num, count))
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await Timer(random.randint(1, 100), 'ns')
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workers = []
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queue_ref = Queue()
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queue_drive = [Queue() for k in range(stat_count)]
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for k in range(stat_count):
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workers.append(cocotb.start_soon(worker(k, queue_ref, queue_drive[k], count=1024)))
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async def driver(dut, queues):
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while True:
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await RisingEdge(dut.clk)
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inc = [0]*stat_count
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valid = [0]*stat_count
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for num, queue in enumerate(queues):
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if not queue.empty():
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count = await queue.get()
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inc[num] += count
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valid[num] = 1
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dut.stat_inc.value = inc
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dut.stat_valid.value = valid
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driver = cocotb.start_soon(driver(dut, queue_drive))
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while workers:
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await workers.pop(0).join()
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await Timer(1000, 'ns')
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driver.kill()
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await Timer(1000, 'ns')
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data_ref = [0]*stat_count
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while not queue_ref.empty():
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num, count = await queue_ref.get()
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data_ref[num] += count
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print(data_ref)
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data = [0]*stat_count
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while not tb.stat_sink.empty():
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stat = await tb.stat_sink.recv()
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if not stat.tuser:
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assert stat.tdata[0] != 0
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data[stat.tid] += stat.tdata[0]
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print(data)
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assert data == data_ref
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await RisingEdge(dut.clk)
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await RisingEdge(dut.clk)
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def cycle_pause():
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return itertools.cycle([1, 1, 1, 0])
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if cocotb.SIM_NAME:
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for test in [
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run_test_acc,
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run_test_max,
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run_test_str,
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run_stress_test,
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]:
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factory = TestFactory(test)
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factory.add_option("backpressure_inserter", [None, cycle_pause])
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factory.generate_tests()
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# cocotb-test
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tests_dir = os.path.dirname(__file__)
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rtl_dir = os.path.abspath(os.path.join(tests_dir, '..', '..', '..', 'rtl'))
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def process_f_files(files):
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lst = {}
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for f in files:
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if f[-2:].lower() == '.f':
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with open(f, 'r') as fp:
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l = fp.read().split()
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for f in process_f_files([os.path.join(os.path.dirname(f), x) for x in l]):
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lst[os.path.basename(f)] = f
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else:
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lst[os.path.basename(f)] = f
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return list(lst.values())
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def test_taxi_stats_collect(request):
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dut = "taxi_stats_collect"
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module = os.path.splitext(os.path.basename(__file__))[0]
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toplevel = module
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verilog_sources = [
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os.path.join(tests_dir, f"{toplevel}.sv"),
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os.path.join(rtl_dir, "stats", f"{dut}.sv"),
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os.path.join(rtl_dir, "axis", "taxi_axis_if.sv"),
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]
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verilog_sources = process_f_files(verilog_sources)
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parameters = {}
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parameters['CNT'] = 8
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parameters['INC_W'] = 8
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parameters['ID_BASE'] = 0
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parameters['UPDATE_PERIOD'] = 128
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parameters['STR_EN'] = 1
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parameters['PREFIX_STR'] = "\"BLK\""
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parameters['STAT_INC_W'] = 16
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parameters['STAT_ID_W'] = (parameters['CNT']-1).bit_length()
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extra_env = {f'PARAM_{k}': str(v) for k, v in parameters.items()}
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sim_build = os.path.join(tests_dir, "sim_build",
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request.node.name.replace('[', '-').replace(']', ''))
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cocotb_test.simulator.run(
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simulator="verilator",
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python_search=[tests_dir],
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verilog_sources=verilog_sources,
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toplevel=toplevel,
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module=module,
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parameters=parameters,
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sim_build=sim_build,
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extra_env=extra_env,
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)
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