scripts/gdb/linux/genpd.py

   1 # SPDX-License-Identifier: GPL-2.0
   2 #
   3 # Copyright (c) NXP 2019
   4
   5 import gdb
   6 import sys
   7
   8 from linux.utils import CachedType
   9 from linux.lists import list_for_each_entry
  10
  11 generic_pm_domain_type = CachedType('struct generic_pm_domain')
  12 pm_domain_data_type = CachedType('struct pm_domain_data')
  13 device_link_type = CachedType('struct device_link')
  14
  15
  16 def kobject_get_path(kobj):
  17     path = kobj['name'].string()
  18     parent = kobj['parent']
  19     if parent:
  20         path = kobject_get_path(parent) + '/' + path
  21     return path
  22
  23
  24 def rtpm_status_str(dev):
  25     if dev['power']['runtime_error']:
  26         return 'error'
  27     if dev['power']['disable_depth']:
  28         return 'unsupported'
  29     _RPM_STATUS_LOOKUP = [
  30         "active",
  31         "resuming",
  32         "suspended",
  33         "suspending"
  34     ]
  35     return _RPM_STATUS_LOOKUP[dev['power']['runtime_status']]
  36
  37
  38 class LxGenPDSummary(gdb.Command):
  39     '''Print genpd summary
  40
  41 Output is similar to /sys/kernel/debug/pm_genpd/pm_genpd_summary'''
  42
  43     def __init__(self):
  44         super(LxGenPDSummary, self).__init__('lx-genpd-summary', gdb.COMMAND_DATA)
  45
  46     def summary_one(self, genpd):
  47         if genpd['status'] == 0:
  48             status_string = 'on'
  49         else:
  50             status_string = 'off-{}'.format(genpd['state_idx'])
  51
  52         child_names = []
  53         for link in list_for_each_entry(
  54                 genpd['parent_links'],
  55                 device_link_type.get_type().pointer(),
  56                 'parent_node'):
  57             child_names.append(link['child']['name'])
  58
  59         gdb.write('%-30s  %-15s %s\n' % (
  60                 genpd['name'].string(),
  61                 status_string,
  62                 ', '.join(child_names)))
  63
  64         # Print devices in domain
  65         for pm_data in list_for_each_entry(genpd['dev_list'],
  66                         pm_domain_data_type.get_type().pointer(),
  67                         'list_node'):
  68             dev = pm_data['dev']
  69             kobj_path = kobject_get_path(dev['kobj'])
  70             gdb.write('    %-50s  %s\n' % (kobj_path, rtpm_status_str(dev)))
  71
  72     def invoke(self, arg, from_tty):
  73         gdb.write('domain                          status          children\n');
  74         gdb.write('    /device                                             runtime status\n');
  75         gdb.write('----------------------------------------------------------------------\n');
  76         for genpd in list_for_each_entry(
  77                 gdb.parse_and_eval('&gpd_list'),
  78                 generic_pm_domain_type.get_type().pointer(),
  79                 'gpd_list_node'):
  80             self.summary_one(genpd)
  81
  82
  83 LxGenPDSummary()