From f5d196d03e5f3529be8b86d350e507390dbee22f Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Fri, 22 Jan 2016 12:30:14 -0700 Subject: test/py: add DFU test Add a test of DFU functionality to the Python test suite. The test starts DFU in U-Boot, waits for USB device enumeration on the host, executes dfu-util multiple times to test various transfer sizes, many of which trigger USB driver edge cases, and finally aborts the DFU command in U-Boot. This test mirrors the functionality previously available via the shell scripts in test/dfu, and hence those are removed too. Signed-off-by: Stephen Warren Acked-by: Lukasz Majewski Acked-by: Simon Glass --- test/py/tests/test_dfu.py | 262 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 262 insertions(+) create mode 100644 test/py/tests/test_dfu.py (limited to 'test/py/tests') diff --git a/test/py/tests/test_dfu.py b/test/py/tests/test_dfu.py new file mode 100644 index 0000000000..cc4b8d8e04 --- /dev/null +++ b/test/py/tests/test_dfu.py @@ -0,0 +1,262 @@ +# Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. +# +# SPDX-License-Identifier: GPL-2.0 + +# Test U-Boot's "dfu" command. The test starts DFU in U-Boot, waits for USB +# device enumeration on the host, executes dfu-util multiple times to test +# various transfer sizes, many of which trigger USB driver edge cases, and +# finally aborts the "dfu" command in U-Boot. + +import os +import os.path +import pytest +import u_boot_utils + +''' +Note: This test relies on: + +a) boardenv_* to contain configuration values to define which USB ports are +available for testing. Without this, this test will be automatically skipped. +For example: + +env__usb_dev_ports = ( + { + "tgt_usb_ctlr": "0", + "host_usb_dev_node": "/dev/usbdev-p2371-2180", + # This parameter is optional /if/ you only have a single board + # attached to your host at a time. + "host_usb_port_path": "3-13", + }, +) + +env__dfu_configs = ( + # eMMC, partition 1 + { + "alt_info": "/dfu_test.bin ext4 0 1;/dfu_dummy.bin ext4 0 1", + "cmd_params": "mmc 0", + }, +) +b) udev rules to set permissions on devices nodes, so that sudo is not +required. For example: + +ACTION=="add", SUBSYSTEM=="block", SUBSYSTEMS=="usb", KERNELS=="3-13", MODE:="666" + +(You may wish to change the group ID instead of setting the permissions wide +open. All that matters is that the user ID running the test can access the +device.) +''' + +# The set of file sizes to test. These values trigger various edge-cases such +# as one less than, equal to, and one greater than typical USB max packet +# sizes, and similar boundary conditions. +test_sizes = ( + 64 - 1, + 64, + 64 + 1, + 128 - 1, + 128, + 128 + 1, + 960 - 1, + 960, + 960 + 1, + 4096 - 1, + 4096, + 4096 + 1, + 1024 * 1024 - 1, + 1024 * 1024, + 8 * 1024 * 1024, +) + +first_usb_dev_port = None + +@pytest.mark.buildconfigspec('cmd_dfu') +def test_dfu(u_boot_console, env__usb_dev_port, env__dfu_config): + '''Test the "dfu" command; the host system must be able to enumerate a USB + device when "dfu" is running, various DFU transfers are tested, and the + USB device must disappear when "dfu" is aborted. + + Args: + u_boot_console: A U-Boot console connection. + env__usb_dev_port: The single USB device-mode port specification on + which to run the test. See the file-level comment above for + details of the format. + env__dfu_config: The single DFU (memory region) configuration on which + to run the test. See the file-level comment above for details + of the format. + + Returns: + Nothing. + ''' + + def start_dfu(): + '''Start U-Boot's dfu shell command. + + This also waits for the host-side USB enumeration process to complete. + + Args: + None. + + Returns: + Nothing. + ''' + + u_boot_console.log.action( + 'Starting long-running U-Boot dfu shell command') + + cmd = 'setenv dfu_alt_info "%s"' % env__dfu_config['alt_info'] + u_boot_console.run_command(cmd) + + cmd = 'dfu 0 ' + env__dfu_config['cmd_params'] + u_boot_console.run_command(cmd, wait_for_prompt=False) + u_boot_console.log.action('Waiting for DFU USB device to appear') + fh = u_boot_utils.wait_until_open_succeeds( + env__usb_dev_port['host_usb_dev_node']) + fh.close() + + def stop_dfu(ignore_errors): + '''Stop U-Boot's dfu shell command from executing. + + This also waits for the host-side USB de-enumeration process to + complete. + + Args: + ignore_errors: Ignore any errors. This is useful if an error has + already been detected, and the code is performing best-effort + cleanup. In this case, we do not want to mask the original + error by "honoring" any new errors. + + Returns: + Nothing. + ''' + + try: + u_boot_console.log.action( + 'Stopping long-running U-Boot dfu shell command') + u_boot_console.ctrlc() + u_boot_console.log.action( + 'Waiting for DFU USB device to disappear') + u_boot_utils.wait_until_file_open_fails( + env__usb_dev_port['host_usb_dev_node'], ignore_errors) + except: + if not ignore_errors: + raise + + def run_dfu_util(alt_setting, fn, up_dn_load_arg): + '''Invoke dfu-util on the host. + + Args: + alt_setting: The DFU "alternate setting" identifier to interact + with. + fn: The host-side file name to transfer. + up_dn_load_arg: '-U' or '-D' depending on whether a DFU upload or + download operation should be performed. + + Returns: + Nothing. + ''' + + cmd = ['dfu-util', '-a', str(alt_setting), up_dn_load_arg, fn] + if 'host_usb_port_path' in env__usb_dev_port: + cmd += ['-p', env__usb_dev_port['host_usb_port_path']] + u_boot_utils.run_and_log(u_boot_console, cmd) + u_boot_console.wait_for('Ctrl+C to exit ...') + + def dfu_write(alt_setting, fn): + '''Write a file to the target board using DFU. + + Args: + alt_setting: The DFU "alternate setting" identifier to interact + with. + fn: The host-side file name to transfer. + + Returns: + Nothing. + ''' + + run_dfu_util(alt_setting, fn, '-D') + + def dfu_read(alt_setting, fn): + '''Read a file from the target board using DFU. + + Args: + alt_setting: The DFU "alternate setting" identifier to interact + with. + fn: The host-side file name to transfer. + + Returns: + Nothing. + ''' + + # dfu-util fails reads/uploads if the host file already exists + if os.path.exists(fn): + os.remove(fn) + run_dfu_util(alt_setting, fn, '-U') + + def dfu_write_read_check(size): + '''Test DFU transfers of a specific size of data + + This function first writes data to the board then reads it back and + compares the written and read back data. Measures are taken to avoid + certain types of false positives. + + Args: + size: The data size to test. + + Returns: + Nothing. + ''' + + test_f = u_boot_utils.PersistentRandomFile(u_boot_console, + 'dfu_%d.bin' % size, size) + readback_fn = u_boot_console.config.result_dir + '/dfu_readback.bin' + + u_boot_console.log.action('Writing test data to DFU primary ' + + 'altsetting') + dfu_write(0, test_f.abs_fn) + + u_boot_console.log.action('Writing dummy data to DFU secondary ' + + 'altsetting to clear DFU buffers') + dfu_write(1, dummy_f.abs_fn) + + u_boot_console.log.action('Reading DFU primary altsetting for ' + + 'comparison') + dfu_read(0, readback_fn) + + u_boot_console.log.action('Comparing written and read data') + written_hash = test_f.content_hash + read_back_hash = u_boot_utils.md5sum_file(readback_fn, size) + assert(written_hash == read_back_hash) + + # This test may be executed against multiple USB ports. The test takes a + # long time, so we don't want to do the whole thing each time. Instead, + # execute the full test on the first USB port, and perform a very limited + # test on other ports. In the limited case, we solely validate that the + # host PC can enumerate the U-Boot USB device. + global first_usb_dev_port + if not first_usb_dev_port: + first_usb_dev_port = env__usb_dev_port + if env__usb_dev_port == first_usb_dev_port: + sizes = test_sizes + else: + sizes = [] + + dummy_f = u_boot_utils.PersistentRandomFile(u_boot_console, + 'dfu_dummy.bin', 1024) + + ignore_cleanup_errors = True + try: + start_dfu() + + u_boot_console.log.action( + 'Overwriting DFU primary altsetting with dummy data') + dfu_write(0, dummy_f.abs_fn) + + for size in sizes: + with u_boot_console.log.section("Data size %d" % size): + dfu_write_read_check(size) + # Make the status of each sub-test obvious. If the test didn't + # pass, an exception was thrown so this code isn't executed. + u_boot_console.log.status_pass('OK') + ignore_cleanup_errors = False + finally: + stop_dfu(ignore_cleanup_errors) -- cgit