Add basic tests for the spi_flash subsystem.
Signed-off-by: Liam Beguin liambeguin@gmail.com --- test/py/tests/test_sf.py | 217 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 217 insertions(+) create mode 100644 test/py/tests/test_sf.py
diff --git a/test/py/tests/test_sf.py b/test/py/tests/test_sf.py new file mode 100644 index 000000000000..8bd1623ff303 --- /dev/null +++ b/test/py/tests/test_sf.py @@ -0,0 +1,217 @@ +# Copyright (c) 2017, Xiphos Systems Corp. All rights reserved. +# +# SPDX-License-Identifier: GPL-2.0 + +import re +import pytest +import random +import u_boot_utils + +""" +Note: This test relies on boardenv_* containing configuration values to define +which SPI Flash areas are available for testing. Without this, this test will +be automatically skipped. +For example: + +# A list of sections of Flash memory to be tested. +env__sf_configs = ( + { + # Where in SPI Flash should the test operate. + 'offset': 0x00000000, + # This value is optional. + # If present, specifies the [[bus:]cs] argument used in `sf probe` + # If missing, defaults to 0. + 'id': '0:1', + # This value is optional. + # If set as a number, specifies the speed of the SPI Flash. + # If set as an array of 2, specifies a range for a random speed. + # If missing, defaults to 0. + 'speed': 1000000, + # This value is optional. + # If present, specifies the size to use for read/write operations. + # If missing, the SPI Flash page size is used as a default (based on + # the `sf probe` output). + 'len': 0x10000, + # This value is optional. + # If present, specifies if the test can write to Flash offset + # If missing, defaults to False. + 'writeable': False, + # This value is optional. + # If present, specifies the expected CRC32 value of the flash area. + # If missing, extra check is ignored. + 'crc32': 0xCAFECAFE, + }, +) +""" + +def sf_prepare(u_boot_console, env__sf_config): + """Check global state of the SPI Flash before running any test. + + Args: + u_boot_console: A U-Boot console connection. + env__sf_config: The single SPI Flash device configuration on which to + run the tests. + + Returns: + sf_params: a dictionnary of SPI Flash parameters. + """ + + sf_params = {} + sf_params['ram_base'] = u_boot_utils.find_ram_base(u_boot_console) + + probe_id = env__sf_config.get('id', 0) + speed = env__sf_config.get('speed', 0) + if isinstance(speed, int): + sf_params['speed'] = speed + else: + assert len(speed) == 2, "If speed is a list, it must have 2 entries" + sf_params['speed'] = random.randint(speed[0], speed[1]) + + cmd = 'sf probe %d %d' % (probe_id, sf_params['speed']) + + output = u_boot_console.run_command(cmd) + assert 'SF: Detected' in output, 'No Flash device available' + + m = re.search('page size (.+?) Bytes', output) + assert m, 'SPI Flash page size not recognized' + sf_params['page_size'] = int(m.group(1)) + + m = re.search('erase size (.+?) KiB', output) + assert m, 'SPI Flash erase size not recognized' + sf_params['erase_size'] = int(m.group(1)) + sf_params['erase_size'] *= 1024 + + m = re.search('total (.+?) MiB', output) + assert m, 'SPI Flash total size not recognized' + sf_params['total_size'] = int(m.group(1)) + sf_params['total_size'] *= 1024 * 1024 + + assert 'offset' in env__sf_config, \ + ''offset' is required for this test.' + sf_params['len'] = env__sf_config.get('len', sf_params['erase_size']) + + assert not env__sf_config['offset'] % sf_params['erase_size'], \ + 'offset not multiple of erase size.' + assert not sf_params['len'] % sf_params['erase_size'], \ + 'erase length not multiple of erase size.' + + assert not (env__sf_config.get('writeable', False) and + 'crc32' in env__sf_config), \ + 'Cannot check crc32 on writeable sections' + + return sf_params + +def sf_read(u_boot_console, env__sf_config, sf_params): + """Helper function used to read and compute the CRC32 value of a section of + SPI Flash memory. + + Args: + u_boot_console: A U-Boot console connection. + env__sf_config: The single SPI Flash device configuration on which to + run the tests. + sf_params: SPI Flash parameters. + + Returns: + CRC32 value of SPI Flash section + """ + + addr = sf_params['ram_base'] + offset = env__sf_config['offset'] + count = sf_params['len'] + pattern = random.randint(0, 0xFF) + crc_expected = env__sf_config.get('crc32', None) + + cmd = 'mw.b %08x %02x %x' % (addr, pattern, count) + u_boot_console.run_command(cmd) + crc_pattern = u_boot_utils.crc32(u_boot_console, addr, count) + if crc_expected: + assert crc_pattern != crc_expected + + cmd = 'sf read %08x %08x %x' % (addr, offset, count) + response = u_boot_console.run_command(cmd) + assert 'Read: OK' in response, 'Read operation failed' + crc_readback = u_boot_utils.crc32(u_boot_console, addr, count) + assert crc_pattern != crc_readback, 'sf read did not update RAM content.' + if crc_expected: + assert crc_readback == crc_expected + + return crc_readback + +def sf_update(u_boot_console, env__sf_config, sf_params): + """Helper function used to update a section of SPI Flash memory. + + Args: + u_boot_console: A U-Boot console connection. + env__sf_config: The single SPI Flash device configuration on which to + run the tests. + + Returns: + CRC32 value of SPI Flash section + """ + + addr = sf_params['ram_base'] + offset = env__sf_config['offset'] + count = sf_params['len'] + pattern = int(random.random() * 0xFF) + + cmd = 'mw.b %08x %02x %x' % (addr, pattern, count) + u_boot_console.run_command(cmd) + crc_pattern = u_boot_utils.crc32(u_boot_console, addr, count) + + cmd = 'sf update %08x %08x %x' % (addr, offset, count) + u_boot_console.run_command(cmd) + crc_readback = sf_read(u_boot_console, env__sf_config, sf_params) + + assert crc_readback == crc_pattern + +@pytest.mark.buildconfigspec('cmd_sf') +@pytest.mark.buildconfigspec('cmd_crc32') +@pytest.mark.buildconfigspec('cmd_memory') +def test_sf_read(u_boot_console, env__sf_config): + sf_params = sf_prepare(u_boot_console, env__sf_config) + sf_read(u_boot_console, env__sf_config, sf_params) + +@pytest.mark.buildconfigspec('cmd_sf') +@pytest.mark.buildconfigspec('cmd_crc32') +@pytest.mark.buildconfigspec('cmd_memory') +def test_sf_read_twice(u_boot_console, env__sf_config): + sf_params = sf_prepare(u_boot_console, env__sf_config) + + crc1 = sf_read(u_boot_console, env__sf_config, sf_params) + sf_params['ram_base'] += 0x100 + crc2 = sf_read(u_boot_console, env__sf_config, sf_params) + + assert crc1 == crc2, 'CRC32 of two successive read operation do not match' + +@pytest.mark.buildconfigspec('cmd_sf') +@pytest.mark.buildconfigspec('cmd_crc32') +@pytest.mark.buildconfigspec('cmd_memory') +def test_sf_erase(u_boot_console, env__sf_config): + if not env__sf_config.get('writeable', False): + pytest.skip('Flash config is tagged as not writeable') + + sf_params = sf_prepare(u_boot_console, env__sf_config) + addr = sf_params['ram_base'] + offset = env__sf_config['offset'] + count = sf_params['len'] + + cmd = 'sf erase %08x %x' % (offset, count) + output = u_boot_console.run_command(cmd) + assert 'Erased: OK' in output, 'Erase operation failed' + + cmd = 'mw.b %08x ff %x' % (addr, count) + u_boot_console.run_command(cmd) + crc_ffs = u_boot_utils.crc32(u_boot_console, addr, count) + + crc_read = sf_read(u_boot_console, env__sf_config, sf_params) + assert crc_ffs == crc_read, 'Unexpected CRC32 after erase operation.' + +@pytest.mark.buildconfigspec('cmd_sf') +@pytest.mark.buildconfigspec('cmd_crc32') +@pytest.mark.buildconfigspec('cmd_memory') +def test_sf_update(u_boot_console, env__sf_config): + if not env__sf_config.get('writeable', False): + pytest.skip('Flash config is tagged as not writeable') + + sf_params = sf_prepare(u_boot_console, env__sf_config) + sf_update(u_boot_console, env__sf_config, sf_params)