forked from mirrors/linux
8207d4a88e
This is like /sys/kernel/debug/pm/pm_genpd_summary except it's accessible through a debugger. This can be useful if the target crashes or hangs because power domains were not properly enabled. Link: http://lkml.kernel.org/r/f9ee627a0d4f94b894aa202fee8a98444049bed8.1561492937.git.leonard.crestez@nxp.com Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
83 lines
2.5 KiB
Python
83 lines
2.5 KiB
Python
# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) NXP 2019
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import gdb
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import sys
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from linux.utils import CachedType
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from linux.lists import list_for_each_entry
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generic_pm_domain_type = CachedType('struct generic_pm_domain')
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pm_domain_data_type = CachedType('struct pm_domain_data')
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device_link_type = CachedType('struct device_link')
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def kobject_get_path(kobj):
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path = kobj['name'].string()
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parent = kobj['parent']
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if parent:
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path = kobject_get_path(parent) + '/' + path
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return path
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def rtpm_status_str(dev):
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if dev['power']['runtime_error']:
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return 'error'
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if dev['power']['disable_depth']:
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return 'unsupported'
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_RPM_STATUS_LOOKUP = [
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"active",
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"resuming",
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"suspended",
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"suspending"
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]
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return _RPM_STATUS_LOOKUP[dev['power']['runtime_status']]
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class LxGenPDSummary(gdb.Command):
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'''Print genpd summary
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Output is similar to /sys/kernel/debug/pm_genpd/pm_genpd_summary'''
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def __init__(self):
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super(LxGenPDSummary, self).__init__('lx-genpd-summary', gdb.COMMAND_DATA)
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def summary_one(self, genpd):
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if genpd['status'] == 0:
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status_string = 'on'
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else:
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status_string = 'off-{}'.format(genpd['state_idx'])
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slave_names = []
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for link in list_for_each_entry(
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genpd['master_links'],
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device_link_type.get_type().pointer(),
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'master_node'):
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slave_names.apend(link['slave']['name'])
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gdb.write('%-30s %-15s %s\n' % (
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genpd['name'].string(),
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status_string,
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', '.join(slave_names)))
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# Print devices in domain
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for pm_data in list_for_each_entry(genpd['dev_list'],
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pm_domain_data_type.get_type().pointer(),
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'list_node'):
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dev = pm_data['dev']
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kobj_path = kobject_get_path(dev['kobj'])
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gdb.write(' %-50s %s\n' % (kobj_path, rtpm_status_str(dev)))
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def invoke(self, arg, from_tty):
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gdb.write('domain status slaves\n');
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gdb.write(' /device runtime status\n');
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gdb.write('----------------------------------------------------------------------\n');
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for genpd in list_for_each_entry(
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gdb.parse_and_eval('&gpd_list'),
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generic_pm_domain_type.get_type().pointer(),
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'gpd_list_node'):
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self.summary_one(genpd)
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LxGenPDSummary()
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