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134 lines
4.9 KiB
134 lines
4.9 KiB
# Copyright 2014 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import logging
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from autotest_lib.client.cros import constants
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from autotest_lib.server import autotest
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POWER_DIR = '/var/lib/power_manager'
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TMP_POWER_DIR = '/tmp/power_manager'
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POWER_DEFAULTS = '/usr/share/power_manager/board_specific'
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RESUME_CTRL_RETRIES = 3
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RESUME_GRACE_PERIOD = 10
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XMLRPC_BRINGUP_TIMEOUT_SECONDS = 60
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DARK_SUSPEND_MAX_DELAY_TIMEOUT_MILLISECONDS = 60000
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class DarkResumeUtils(object):
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"""Class containing common functionality for tests which exercise dark
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resume pathways. We set up powerd to allow dark resume and also configure
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the suspended devices so that the backchannel can stay up. We can also
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check for the number of dark resumes that have happened in a particular
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suspend request.
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"""
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def __init__(self, host, duration=0):
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"""Set up powerd preferences so we will properly go into dark resume,
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and still be able to communicate with the DUT.
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@param host: the DUT to set up dark resume for
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"""
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self._host = host
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logging.info('Setting up dark resume preferences')
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# Make temporary directory, which will be used to hold
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# temporary preferences. We want to avoid writing into
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# /var/lib so we don't have to save any state.
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logging.debug('Creating temporary powerd prefs at %s', TMP_POWER_DIR)
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host.run('mkdir -p %s' % TMP_POWER_DIR)
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logging.debug('Enabling dark resume')
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host.run('echo 0 > %s/disable_dark_resume' % TMP_POWER_DIR)
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logging.debug('setting max dark suspend delay timeout to %d msecs',
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DARK_SUSPEND_MAX_DELAY_TIMEOUT_MILLISECONDS)
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host.run('echo %d > %s/max_dark_suspend_delay_timeout_ms' %
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(DARK_SUSPEND_MAX_DELAY_TIMEOUT_MILLISECONDS, TMP_POWER_DIR))
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# bind the tmp directory to the power preference directory
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host.run('mount --bind %s %s' % (TMP_POWER_DIR, POWER_DIR))
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logging.debug('Restarting powerd with new settings')
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host.run('stop powerd; start powerd')
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logging.debug('Starting XMLRPC session to watch for dark resumes')
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self._client_proxy = self._get_xmlrpc_proxy()
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def teardown(self):
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"""Clean up changes made by DarkResumeUtils."""
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logging.info('Tearing down dark resume preferences')
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logging.debug('Cleaning up temporary powerd bind mounts')
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self._host.run('umount %s' % POWER_DIR)
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logging.debug('Restarting powerd to revert to old settings')
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self._host.run('stop powerd; start powerd')
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def suspend(self, suspend_secs):
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""" Suspends the device for |suspend_secs| without blocking for resume.
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@param suspend_secs : Sleep for seconds. Sets a RTC alarm to wake the
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system.
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"""
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logging.info('Suspending DUT (in background)...')
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self._client_proxy.suspend_bg(suspend_secs)
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def stop_resuspend_on_dark_resume(self, stop_resuspend=True):
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"""
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If |stop_resuspend| is True, stops re-suspend on seeing a dark resume.
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"""
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self._client_proxy.set_stop_resuspend(stop_resuspend)
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def count_dark_resumes(self):
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"""Return the number of dark resumes since the beginning of the test.
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This method will raise an error if the DUT is not reachable.
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@return the number of dark resumes counted by this DarkResumeUtils
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"""
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return self._client_proxy.get_dark_resume_count()
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def host_has_lid(self):
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"""Returns True if the DUT has a lid."""
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return self._client_proxy.has_lid()
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def _get_xmlrpc_proxy(self):
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"""Get a dark resume XMLRPC proxy for the host this DarkResumeUtils is
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attached to.
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The returned object has no particular type. Instead, when you call
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a method on the object, it marshalls the objects passed as arguments
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and uses them to make RPCs on the remote server. Thus, you should
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read dark_resume_xmlrpc_server.py to find out what methods are supported.
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@return proxy object for remote XMLRPC server.
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"""
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# Make sure the client library is on the device so that the proxy
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# code is there when we try to call it.
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client_at = autotest.Autotest(self._host)
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client_at.install()
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# Start up the XMLRPC proxy on the client
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proxy = self._host.rpc_server_tracker.xmlrpc_connect(
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constants.DARK_RESUME_XMLRPC_SERVER_COMMAND,
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constants.DARK_RESUME_XMLRPC_SERVER_PORT,
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command_name=
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constants.DARK_RESUME_XMLRPC_SERVER_CLEANUP_PATTERN,
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ready_test_name=
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constants.DARK_RESUME_XMLRPC_SERVER_READY_METHOD,
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timeout_seconds=XMLRPC_BRINGUP_TIMEOUT_SECONDS)
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return proxy
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