--- /dev/null
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) NXP 2019
+
+import gdb
+
+from linux.utils import CachedType
+from linux.utils import container_of
+from linux.lists import list_for_each_entry
+
+
+device_private_type = CachedType('struct device_private')
+device_type = CachedType('struct device')
+
+subsys_private_type = CachedType('struct subsys_private')
+kobject_type = CachedType('struct kobject')
+kset_type = CachedType('struct kset')
+
+bus_type = CachedType('struct bus_type')
+class_type = CachedType('struct class')
+
+
+def dev_name(dev):
+ dev_init_name = dev['init_name']
+ if dev_init_name:
+ return dev_init_name.string()
+ return dev['kobj']['name'].string()
+
+
+def kset_for_each_object(kset):
+ return list_for_each_entry(kset['list'],
+ kobject_type.get_type().pointer(), "entry")
+
+
+def for_each_bus():
+ for kobj in kset_for_each_object(gdb.parse_and_eval('bus_kset')):
+ subsys = container_of(kobj, kset_type.get_type().pointer(), 'kobj')
+ subsys_priv = container_of(subsys, subsys_private_type.get_type().pointer(), 'subsys')
+ yield subsys_priv['bus']
+
+
+def for_each_class():
+ for kobj in kset_for_each_object(gdb.parse_and_eval('class_kset')):
+ subsys = container_of(kobj, kset_type.get_type().pointer(), 'kobj')
+ subsys_priv = container_of(subsys, subsys_private_type.get_type().pointer(), 'subsys')
+ yield subsys_priv['class']
+
+
+def get_bus_by_name(name):
+ for item in for_each_bus():
+ if item['name'].string() == name:
+ return item
+ raise gdb.GdbError("Can't find bus type {!r}".format(name))
+
+
+def get_class_by_name(name):
+ for item in for_each_class():
+ if item['name'].string() == name:
+ return item
+ raise gdb.GdbError("Can't find device class {!r}".format(name))
+
+
+klist_type = CachedType('struct klist')
+klist_node_type = CachedType('struct klist_node')
+
+
+def klist_for_each(klist):
+ return list_for_each_entry(klist['k_list'],
+ klist_node_type.get_type().pointer(), 'n_node')
+
+
+def bus_for_each_device(bus):
+ for kn in klist_for_each(bus['p']['klist_devices']):
+ dp = container_of(kn, device_private_type.get_type().pointer(), 'knode_bus')
+ yield dp['device']
+
+
+def class_for_each_device(cls):
+ for kn in klist_for_each(cls['p']['klist_devices']):
+ dp = container_of(kn, device_private_type.get_type().pointer(), 'knode_class')
+ yield dp['device']
+
+
+def device_for_each_child(dev):
+ for kn in klist_for_each(dev['p']['klist_children']):
+ dp = container_of(kn, device_private_type.get_type().pointer(), 'knode_parent')
+ yield dp['device']
+
+
+def _show_device(dev, level=0, recursive=False):
+ gdb.write('{}dev {}:\t{}\n'.format('\t' * level, dev_name(dev), dev))
+ if recursive:
+ for child in device_for_each_child(dev):
+ _show_device(child, level + 1, recursive)
+
+
+class LxDeviceListBus(gdb.Command):
+ '''Print devices on a bus (or all buses if not specified)'''
+
+ def __init__(self):
+ super(LxDeviceListBus, self).__init__('lx-device-list-bus', gdb.COMMAND_DATA)
+
+ def invoke(self, arg, from_tty):
+ if not arg:
+ for bus in for_each_bus():
+ gdb.write('bus {}:\t{}\n'.format(bus['name'].string(), bus))
+ for dev in bus_for_each_device(bus):
+ _show_device(dev, level=1)
+ else:
+ bus = get_bus_by_name(arg)
+ if not bus:
+ raise gdb.GdbError("Can't find bus {!r}".format(arg))
+ for dev in bus_for_each_device(bus):
+ _show_device(dev)
+
+
+class LxDeviceListClass(gdb.Command):
+ '''Print devices in a class (or all classes if not specified)'''
+
+ def __init__(self):
+ super(LxDeviceListClass, self).__init__('lx-device-list-class', gdb.COMMAND_DATA)
+
+ def invoke(self, arg, from_tty):
+ if not arg:
+ for cls in for_each_class():
+ gdb.write("class {}:\t{}\n".format(cls['name'].string(), cls))
+ for dev in class_for_each_device(cls):
+ _show_device(dev, level=1)
+ else:
+ cls = get_class_by_name(arg)
+ for dev in class_for_each_device(cls):
+ _show_device(dev)
+
+
+class LxDeviceListTree(gdb.Command):
+ '''Print a device and its children recursively'''
+
+ def __init__(self):
+ super(LxDeviceListTree, self).__init__('lx-device-list-tree', gdb.COMMAND_DATA)
+
+ def invoke(self, arg, from_tty):
+ if not arg:
+ raise gdb.GdbError('Please provide pointer to struct device')
+ dev = gdb.parse_and_eval(arg)
+ if dev.type != device_type.get_type().pointer():
+ raise gdb.GdbError('Please provide pointer to struct device')
+ _show_device(dev, level=0, recursive=True)
+
+
+class LxDeviceFindByBusName(gdb.Function):
+ '''Find struct device by bus and name (both strings)'''
+
+ def __init__(self):
+ super(LxDeviceFindByBusName, self).__init__('lx_device_find_by_bus_name')
+
+ def invoke(self, bus, name):
+ name = name.string()
+ bus = get_bus_by_name(bus.string())
+ for dev in bus_for_each_device(bus):
+ if dev_name(dev) == name:
+ return dev
+
+
+class LxDeviceFindByClassName(gdb.Function):
+ '''Find struct device by class and name (both strings)'''
+
+ def __init__(self):
+ super(LxDeviceFindByClassName, self).__init__('lx_device_find_by_class_name')
+
+ def invoke(self, cls, name):
+ name = name.string()
+ cls = get_class_by_name(cls.string())
+ for dev in class_for_each_device(cls):
+ if dev_name(dev) == name:
+ return dev
+
+
+LxDeviceListBus()
+LxDeviceListClass()
+LxDeviceListTree()
+LxDeviceFindByBusName()
+LxDeviceFindByClassName()
projects / kernel.git / commitdiff