Commit 8207d4a8 authored by Leonard Crestez's avatar Leonard Crestez Committed by Linus Torvalds

scripts/gdb: add lx-genpd-summary command

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.comSigned-off-by: default avatarLeonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: default avatarStephen 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5515e9a6
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) NXP 2019
import gdb
import sys
from linux.utils import CachedType
from linux.lists import list_for_each_entry
generic_pm_domain_type = CachedType('struct generic_pm_domain')
pm_domain_data_type = CachedType('struct pm_domain_data')
device_link_type = CachedType('struct device_link')
def kobject_get_path(kobj):
path = kobj['name'].string()
parent = kobj['parent']
if parent:
path = kobject_get_path(parent) + '/' + path
return path
def rtpm_status_str(dev):
if dev['power']['runtime_error']:
return 'error'
if dev['power']['disable_depth']:
return 'unsupported'
_RPM_STATUS_LOOKUP = [
"active",
"resuming",
"suspended",
"suspending"
]
return _RPM_STATUS_LOOKUP[dev['power']['runtime_status']]
class LxGenPDSummary(gdb.Command):
'''Print genpd summary
Output is similar to /sys/kernel/debug/pm_genpd/pm_genpd_summary'''
def __init__(self):
super(LxGenPDSummary, self).__init__('lx-genpd-summary', gdb.COMMAND_DATA)
def summary_one(self, genpd):
if genpd['status'] == 0:
status_string = 'on'
else:
status_string = 'off-{}'.format(genpd['state_idx'])
slave_names = []
for link in list_for_each_entry(
genpd['master_links'],
device_link_type.get_type().pointer(),
'master_node'):
slave_names.apend(link['slave']['name'])
gdb.write('%-30s %-15s %s\n' % (
genpd['name'].string(),
status_string,
', '.join(slave_names)))
# Print devices in domain
for pm_data in list_for_each_entry(genpd['dev_list'],
pm_domain_data_type.get_type().pointer(),
'list_node'):
dev = pm_data['dev']
kobj_path = kobject_get_path(dev['kobj'])
gdb.write(' %-50s %s\n' % (kobj_path, rtpm_status_str(dev)))
def invoke(self, arg, from_tty):
gdb.write('domain status slaves\n');
gdb.write(' /device runtime status\n');
gdb.write('----------------------------------------------------------------------\n');
for genpd in list_for_each_entry(
gdb.parse_and_eval('&gpd_list'),
generic_pm_domain_type.get_type().pointer(),
'gpd_list_node'):
self.summary_one(genpd)
LxGenPDSummary()
...@@ -35,3 +35,4 @@ else: ...@@ -35,3 +35,4 @@ else:
import linux.constants import linux.constants
import linux.timerlist import linux.timerlist
import linux.clk import linux.clk
import linux.genpd
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