linux-2.6.33/device_add() の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-2.6.33/device_add() へ行く。
  • 1 (2010-06-09 (水) 16:19:46)

---

参照元†

• linux-2.6.33/platform_device_add()

説明†

• パス: linux-2.6.33/drivers/base/core.c

• FIXME: これは何？
  • 説明

引数†

• struct device *dev
  • linux-2.6.33/device

返り値†

• int

参考†

実装†

/**
 * device_add - add device to device hierarchy.
 * @dev: device.
 *
 * This is part 2 of device_register(), though may be called
 * separately _iff_ device_initialize() has been called separately.
 *
 * This adds @dev to the kobject hierarchy via kobject_add(), adds it
 * to the global and sibling lists for the device, then
 * adds it to the other relevant subsystems of the driver model.
 *
 * NOTE: _Never_ directly free @dev after calling this function, even
 * if it returned an error! Always use put_device() to give up your
 * reference instead.
 */
int device_add(struct device *dev)
{
	struct device *parent = NULL;
	struct class_interface *class_intf;

• • linux-2.6.33/device

• linux-2.6.33/class_interface

	int error = -EINVAL;

	dev = get_device(dev);
	if (!dev)
		goto done;

• • linux-2.6.33/get_device()

	if (!dev->p) {
		error = device_private_init(dev);
		if (error)
			goto done;
	}

• dev->p は struct device_private 型
  • linux-2.6.33/device_private
  • linux-2.6.33/device_private_init()

	/*
	 * for statically allocated devices, which should all be converted
	 * some day, we need to initialize the name. We prevent reading back
	 * the name, and force the use of dev_name()
	 */
	if (dev->init_name) {
		dev_set_name(dev, "%s", dev->init_name);
		dev->init_name = NULL;
	}

• • linux-2.6.33/dev_set_name()

	if (!dev_name(dev)) {
		error = -EINVAL;
		goto name_error;
	}

• • linux-2.6.33/dev_name()

	pr_debug("device: '%s': %s\n", dev_name(dev), __func__);

• • linux-2.6.33/pr_debug()

	parent = get_device(dev->parent);
	setup_parent(dev, parent);

• • linux-2.6.33/get_device()

• linux-2.6.33/setup_parent()

	/* use parent numa_node */
	if (parent)
		set_dev_node(dev, dev_to_node(parent));

• • linux-2.6.33/set_dev_node()
  • linux-2.6.33/dev_to_node()

	/* first, register with generic layer. */
	/* we require the name to be set before, and pass NULL */
	error = kobject_add(&dev->kobj, dev->kobj.parent, NULL);
	if (error)
		goto Error;

• dev->kobj は kobject 型
  • linux-2.6.33/kobject_add()
  • linux-2.6.33/kobject

	/* notify platform of device entry */
	if (platform_notify)
		platform_notify(dev);

• • linux-2.6.33/platform_notify()

	error = device_create_file(dev, &uevent_attr);
	if (error)
		goto attrError;

• • linux-2.6.33/device_create_file()

	if (MAJOR(dev->devt)) {
		error = device_create_file(dev, &devt_attr);
		if (error)
			goto ueventattrError;

		error = device_create_sys_dev_entry(dev);
		if (error)
			goto devtattrError;

• dev->devt は dev_t 型
  • linux-2.6.33/dev_t
  • linux-2.6.33/MAJOR()
  • linux-2.6.33/device_create_sys_dev_entry()

		devtmpfs_create_node(dev);

• • linux-2.6.33/devtmpfs_create_node()

	}

	error = device_add_class_symlinks(dev);
	if (error)
		goto SymlinkError;

• • linux-2.6.33/device_add_class_symlinks()

	error = device_add_attrs(dev);
	if (error)
		goto AttrsError;

• • linux-2.6.33/device_add_attrs()

	error = bus_add_device(dev);
	if (error)
		goto BusError;

• • linux-2.6.33/bus_add_device()

	error = dpm_sysfs_add(dev);
	if (error)
		goto DPMError;

• • linux-2.6.33/dpm_sysfs_add()

	device_pm_add(dev);

• • linux-2.6.33/device_pm_add()

	/* Notify clients of device addition.  This call must come
	 * after dpm_sysf_add() and before kobject_uevent().
	 */
	if (dev->bus)
		blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
					     BUS_NOTIFY_ADD_DEVICE, dev);

• dev->bus は struct bus_type 型
  • linux-2.6.33/bus_type
  • linux-2.6.33/blocking_notifier_call_chain()

	kobject_uevent(&dev->kobj, KOBJ_ADD);
	bus_probe_device(dev);
	if (parent)
		klist_add_tail(&dev->p->knode_parent,
			       &parent->p->klist_children);

• • linux-2.6.33/kobject_uevent()

• linux-2.6.33/bus_probe_device()

• • linux-2.6.33/klist_add_tail()

	if (dev->class) {
		mutex_lock(&dev->class->p->class_mutex);
		/* tie the class to the device */
		klist_add_tail(&dev->knode_class,
			       &dev->class->p->class_devices);

• dev->class は struct class 型
  • linux-2.6.33/class
  • linux-2.6.33/mutex_lock()
  • linux-2.6.33/klist_add_tail()

		/* notify any interfaces that the device is here */
		list_for_each_entry(class_intf,
				    &dev->class->p->class_interfaces, node)
			if (class_intf->add_dev)
				class_intf->add_dev(dev, class_intf);
		mutex_unlock(&dev->class->p->class_mutex);

• • linux-2.6.33/list_for_each_entry()
• class_intf は struct class_interface * 型のローカル変数
  • linux-2.6.33/class_interface
  • linux-2.6.33/mutex_unlock()

	}
done:
	put_device(dev);
	return error;

• • linux-2.6.33/put_device()

 DPMError:
	bus_remove_device(dev);

• • linux-2.6.33/bus_remove_device()

 BusError:
	device_remove_attrs(dev);

• • linux-2.6.33/device_remove_attrs()

 AttrsError:
	device_remove_class_symlinks(dev);

• • linux-2.6.33/device_remove_class_symlinks()

 SymlinkError:
	if (MAJOR(dev->devt))
		devtmpfs_delete_node(dev);
	if (MAJOR(dev->devt))
		device_remove_sys_dev_entry(dev);

• • linux-2.6.33/devtmpfs_delete_node()

• linux-2.6.33/device_remove_sys_dev_entry()

 devtattrError:
	if (MAJOR(dev->devt))
		device_remove_file(dev, &devt_attr);

• • linux-2.6.33/device_remove_file()

 ueventattrError:
	device_remove_file(dev, &uevent_attr);

• • linux-2.6.33/device_remove_file()

 attrError:
	kobject_uevent(&dev->kobj, KOBJ_REMOVE);
	kobject_del(&dev->kobj);

• • linux-2.6.33/kobject_uevent()

• linux-2.6.33/kobject_del()

 Error:
	cleanup_device_parent(dev);
	if (parent)
		put_device(parent);

• • linux-2.6.33/cleanup_device_parent()

• linux-2.6.33/put_device()

name_error:
	kfree(dev->p);
	dev->p = NULL;
	goto done;

• • linux-2.6.33/kfree()

}

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