[mirror_ubuntu-artful-kernel.git] / net / mac802154 / main.c

/*
 * Copyright (C) 2007-2012 Siemens AG
 *
 * Written by:
 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
 *
 * Based on the code from 'linux-zigbee.sourceforge.net' project.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>

#include <net/netlink.h>
#include <linux/nl802154.h>
#include <net/mac802154.h>
#include <net/ieee802154_netdev.h>
#include <net/route.h>
#include <net/cfg802154.h>

#include "ieee802154_i.h"

int mac802154_slave_open(struct net_device *dev)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct mac802154_sub_if_data *subif;
	struct mac802154_priv *ipriv = priv->hw;
	int res = 0;

	ASSERT_RTNL();

	if (priv->type == IEEE802154_DEV_WPAN) {
		mutex_lock(&priv->hw->slaves_mtx);
		list_for_each_entry(subif, &priv->hw->slaves, list) {
			if (subif != priv && subif->type == priv->type &&
			    subif->running) {
				mutex_unlock(&priv->hw->slaves_mtx);
				return -EBUSY;
			}
		}
		mutex_unlock(&priv->hw->slaves_mtx);
	}

	mutex_lock(&priv->hw->slaves_mtx);
	priv->running = true;
	mutex_unlock(&priv->hw->slaves_mtx);

	if (ipriv->open_count++ == 0) {
		res = ipriv->ops->start(&ipriv->hw);
		WARN_ON(res);
		if (res)
			goto err;
	}

	if (ipriv->ops->ieee_addr) {
		__le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);

		res = ipriv->ops->ieee_addr(&ipriv->hw, addr);
		WARN_ON(res);
		if (res)
			goto err;
		mac802154_dev_set_ieee_addr(dev);
	}

	netif_start_queue(dev);
	return 0;
err:
	priv->hw->open_count--;

	return res;
}

int mac802154_slave_close(struct net_device *dev)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct mac802154_priv *ipriv = priv->hw;

	ASSERT_RTNL();

	netif_stop_queue(dev);

	mutex_lock(&priv->hw->slaves_mtx);
	priv->running = false;
	mutex_unlock(&priv->hw->slaves_mtx);

	if (!--ipriv->open_count)
		ipriv->ops->stop(&ipriv->hw);

	return 0;
}

static int
mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
{
	struct mac802154_sub_if_data *priv;
	struct mac802154_priv *ipriv;
	int err;

	ipriv = wpan_phy_priv(phy);

	priv = netdev_priv(dev);
	priv->dev = dev;
	priv->hw = ipriv;

	dev->needed_headroom = ipriv->hw.extra_tx_headroom;

	SET_NETDEV_DEV(dev, &ipriv->phy->dev);

	mutex_lock(&ipriv->slaves_mtx);
	if (!ipriv->running) {
		mutex_unlock(&ipriv->slaves_mtx);
		return -ENODEV;
	}
	mutex_unlock(&ipriv->slaves_mtx);

	err = register_netdev(dev);
	if (err < 0)
		return err;

	rtnl_lock();
	mutex_lock(&ipriv->slaves_mtx);
	list_add_tail_rcu(&priv->list, &ipriv->slaves);
	mutex_unlock(&ipriv->slaves_mtx);
	rtnl_unlock();

	return 0;
}

static void
mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev)
{
	struct mac802154_sub_if_data *sdata;

	ASSERT_RTNL();

	sdata = netdev_priv(dev);

	BUG_ON(sdata->hw->phy != phy);

	mutex_lock(&sdata->hw->slaves_mtx);
	list_del_rcu(&sdata->list);
	mutex_unlock(&sdata->hw->slaves_mtx);

	synchronize_rcu();
	unregister_netdevice(sdata->dev);
}

static struct net_device *
mac802154_add_iface(struct wpan_phy *phy, const char *name, int type)
{
	struct net_device *dev;
	int err = -ENOMEM;

	switch (type) {
	case IEEE802154_DEV_MONITOR:
		dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
				   name, NET_NAME_UNKNOWN,
				   mac802154_monitor_setup);
		break;
	case IEEE802154_DEV_WPAN:
		dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
				   name, NET_NAME_UNKNOWN,
				   mac802154_wpan_setup);
		break;
	default:
		dev = NULL;
		err = -EINVAL;
		break;
	}
	if (!dev)
		goto err;

	err = mac802154_netdev_register(phy, dev);
	if (err)
		goto err_free;

	dev_hold(dev); /* we return an incremented device refcount */
	return dev;

err_free:
	free_netdev(dev);
err:
	return ERR_PTR(err);
}

static int mac802154_set_txpower(struct wpan_phy *phy, int db)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_txpower(&priv->hw, db);
}

static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_lbt(&priv->hw, on);
}

static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_cca_mode(&priv->hw, mode);
}

static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_cca_ed_level(&priv->hw, level);
}

static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
				     u8 max_be, u8 retries)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
}

static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
{
	struct mac802154_priv *priv = wpan_phy_priv(phy);

	return priv->ops->set_frame_retries(&priv->hw, retries);
}

struct ieee802154_dev *
ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
{
	struct wpan_phy *phy;
	struct mac802154_priv *priv;
	size_t priv_size;

	if (!ops || !ops->xmit || !ops->ed || !ops->start ||
	    !ops->stop || !ops->set_channel) {
		pr_err("undefined IEEE802.15.4 device operations\n");
		return NULL;
	}

	/* Ensure 32-byte alignment of our private data and hw private data.
	 * We use the wpan_phy priv data for both our mac802154_priv and for
	 * the driver's private data
	 *
	 * in memory it'll be like this:
	 *
	 * +-----------------------+
	 * | struct wpan_phy       |
	 * +-----------------------+
	 * | struct mac802154_priv |
	 * +-----------------------+
	 * | driver's private data |
	 * +-----------------------+
	 *
	 * Due to ieee802154 layer isn't aware of driver and MAC structures,
	 * so lets align them here.
	 */

	priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;

	phy = wpan_phy_alloc(priv_size);
	if (!phy) {
		pr_err("failure to allocate master IEEE802.15.4 device\n");
		return NULL;
	}

	priv = wpan_phy_priv(phy);
	priv->phy = phy;
	priv->hw.phy = priv->phy;
	priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
	priv->ops = ops;

	INIT_LIST_HEAD(&priv->slaves);
	mutex_init(&priv->slaves_mtx);

	return &priv->hw;
}
EXPORT_SYMBOL(ieee802154_alloc_device);

void ieee802154_free_device(struct ieee802154_dev *hw)
{
	struct mac802154_priv *priv = mac802154_to_priv(hw);

	BUG_ON(!list_empty(&priv->slaves));

	mutex_destroy(&priv->slaves_mtx);

	wpan_phy_free(priv->phy);
}
EXPORT_SYMBOL(ieee802154_free_device);

int ieee802154_register_device(struct ieee802154_dev *dev)
{
	struct mac802154_priv *priv = mac802154_to_priv(dev);
	int rc = -ENOSYS;

	if (dev->flags & IEEE802154_HW_TXPOWER) {
		if (!priv->ops->set_txpower)
			goto out;

		priv->phy->set_txpower = mac802154_set_txpower;
	}

	if (dev->flags & IEEE802154_HW_LBT) {
		if (!priv->ops->set_lbt)
			goto out;

		priv->phy->set_lbt = mac802154_set_lbt;
	}

	if (dev->flags & IEEE802154_HW_CCA_MODE) {
		if (!priv->ops->set_cca_mode)
			goto out;

		priv->phy->set_cca_mode = mac802154_set_cca_mode;
	}

	if (dev->flags & IEEE802154_HW_CCA_ED_LEVEL) {
		if (!priv->ops->set_cca_ed_level)
			goto out;

		priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
	}

	if (dev->flags & IEEE802154_HW_CSMA_PARAMS) {
		if (!priv->ops->set_csma_params)
			goto out;

		priv->phy->set_csma_params = mac802154_set_csma_params;
	}

	if (dev->flags & IEEE802154_HW_FRAME_RETRIES) {
		if (!priv->ops->set_frame_retries)
			goto out;

		priv->phy->set_frame_retries = mac802154_set_frame_retries;
	}

	priv->dev_workqueue =
		create_singlethread_workqueue(wpan_phy_name(priv->phy));
	if (!priv->dev_workqueue) {
		rc = -ENOMEM;
		goto out;
	}

	wpan_phy_set_dev(priv->phy, priv->hw.parent);

	priv->phy->add_iface = mac802154_add_iface;
	priv->phy->del_iface = mac802154_del_iface;

	rc = wpan_phy_register(priv->phy);
	if (rc < 0)
		goto out_wq;

	rtnl_lock();

	mutex_lock(&priv->slaves_mtx);
	priv->running = MAC802154_DEVICE_RUN;
	mutex_unlock(&priv->slaves_mtx);

	rtnl_unlock();

	return 0;

out_wq:
	destroy_workqueue(priv->dev_workqueue);
out:
	return rc;
}
EXPORT_SYMBOL(ieee802154_register_device);

void ieee802154_unregister_device(struct ieee802154_dev *dev)
{
	struct mac802154_priv *priv = mac802154_to_priv(dev);
	struct mac802154_sub_if_data *sdata, *next;

	flush_workqueue(priv->dev_workqueue);
	destroy_workqueue(priv->dev_workqueue);

	rtnl_lock();

	mutex_lock(&priv->slaves_mtx);
	priv->running = MAC802154_DEVICE_STOPPED;
	mutex_unlock(&priv->slaves_mtx);

	list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
		mutex_lock(&sdata->hw->slaves_mtx);
		list_del(&sdata->list);
		mutex_unlock(&sdata->hw->slaves_mtx);

		unregister_netdevice(sdata->dev);
	}

	rtnl_unlock();

	wpan_phy_unregister(priv->phy);
}
EXPORT_SYMBOL(ieee802154_unregister_device);

MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
1010f540	1	/*
	2	* Copyright (C) 2007-2012 Siemens AG
	3	*
	4	* Written by:
	5	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	6	*
	7	* Based on the code from 'linux-zigbee.sourceforge.net' project.
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2
	11	* as published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
1010f540	17	*/
	18
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/netdevice.h>
	22
62610ad2	23	#include <net/netlink.h>
62610ad2	24	#include <linux/nl802154.h>
1010f540	25	#include <net/mac802154.h>
b70ab2e8	26	#include <net/ieee802154_netdev.h>
1010f540	27	#include <net/route.h>
5ad60d36	28	#include <net/cfg802154.h>
1010f540	29
0f1556bc	30	#include "ieee802154_i.h"
1010f540	31
62610ad2	32	int mac802154_slave_open(struct net_device *dev)
	33	{
	34	struct mac802154_sub_if_data *priv = netdev_priv(dev);
336908f6	35	struct mac802154_sub_if_data *subif;
62610ad2	36	struct mac802154_priv *ipriv = priv->hw;
	37	int res = 0;
	38
336908f6 PB	39	ASSERT_RTNL();
	40
	41	if (priv->type == IEEE802154_DEV_WPAN) {
	42	mutex_lock(&priv->hw->slaves_mtx);
	43	list_for_each_entry(subif, &priv->hw->slaves, list) {
	44	if (subif != priv && subif->type == priv->type &&
	45	subif->running) {
	46	mutex_unlock(&priv->hw->slaves_mtx);
	47	return -EBUSY;
	48	}
	49	}
	50	mutex_unlock(&priv->hw->slaves_mtx);
	51	}
	52
	53	mutex_lock(&priv->hw->slaves_mtx);
	54	priv->running = true;
	55	mutex_unlock(&priv->hw->slaves_mtx);
	56
62610ad2	57	if (ipriv->open_count++ == 0) {
	58	res = ipriv->ops->start(&ipriv->hw);
	59	WARN_ON(res);
	60	if (res)
	61	goto err;
	62	}
	63
	64	if (ipriv->ops->ieee_addr) {
b70ab2e8 PB	65	__le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);
	66
	67	res = ipriv->ops->ieee_addr(&ipriv->hw, addr);
62610ad2	68	WARN_ON(res);
	69	if (res)
	70	goto err;
	71	mac802154_dev_set_ieee_addr(dev);
	72	}
	73
	74	netif_start_queue(dev);
	75	return 0;
	76	err:
	77	priv->hw->open_count--;
	78
	79	return res;
	80	}
	81
	82	int mac802154_slave_close(struct net_device *dev)
	83	{
	84	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	85	struct mac802154_priv *ipriv = priv->hw;
	86
336908f6 PB	87	ASSERT_RTNL();
336908f6 PB	88
62610ad2	89	netif_stop_queue(dev);
62610ad2	90
336908f6 PB	91	mutex_lock(&priv->hw->slaves_mtx);
	92	priv->running = false;
	93	mutex_unlock(&priv->hw->slaves_mtx);
	94
62610ad2	95	if (!--ipriv->open_count)
	96	ipriv->ops->stop(&ipriv->hw);
	97
	98	return 0;
	99	}
	100
	101	static int
	102	mac802154_netdev_register(struct wpan_phy phy, struct net_device dev)
	103	{
	104	struct mac802154_sub_if_data *priv;
	105	struct mac802154_priv *ipriv;
	106	int err;
	107
	108	ipriv = wpan_phy_priv(phy);
	109
	110	priv = netdev_priv(dev);
	111	priv->dev = dev;
	112	priv->hw = ipriv;
	113
	114	dev->needed_headroom = ipriv->hw.extra_tx_headroom;
	115
	116	SET_NETDEV_DEV(dev, &ipriv->phy->dev);
	117
	118	mutex_lock(&ipriv->slaves_mtx);
	119	if (!ipriv->running) {
	120	mutex_unlock(&ipriv->slaves_mtx);
	121	return -ENODEV;
	122	}
	123	mutex_unlock(&ipriv->slaves_mtx);
	124
	125	err = register_netdev(dev);
	126	if (err < 0)
	127	return err;
	128
	129	rtnl_lock();
	130	mutex_lock(&ipriv->slaves_mtx);
	131	list_add_tail_rcu(&priv->list, &ipriv->slaves);
	132	mutex_unlock(&ipriv->slaves_mtx);
	133	rtnl_unlock();
	134
	135	return 0;
	136	}
	137
	138	static void
	139	mac802154_del_iface(struct wpan_phy phy, struct net_device dev)
	140	{
	141	struct mac802154_sub_if_data *sdata;
4710d806	142
62610ad2	143	ASSERT_RTNL();
	144
	145	sdata = netdev_priv(dev);
	146
	147	BUG_ON(sdata->hw->phy != phy);
	148
	149	mutex_lock(&sdata->hw->slaves_mtx);
	150	list_del_rcu(&sdata->list);
	151	mutex_unlock(&sdata->hw->slaves_mtx);
	152
	153	synchronize_rcu();
	154	unregister_netdevice(sdata->dev);
	155	}
	156
	157	static struct net_device *
	158	mac802154_add_iface(struct wpan_phy phy, const char name, int type)
	159	{
	160	struct net_device *dev;
	161	int err = -ENOMEM;
	162
62610ad2	163	switch (type) {
0606069d	164	case IEEE802154_DEV_MONITOR:
0606069d	165	dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
c835a677 TG	166	name, NET_NAME_UNKNOWN,
c835a677 TG	167	mac802154_monitor_setup);
0606069d	168	break;
32bad7e3	169	case IEEE802154_DEV_WPAN:
32bad7e3	170	dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
c835a677 TG	171	name, NET_NAME_UNKNOWN,
c835a677 TG	172	mac802154_wpan_setup);
32bad7e3	173	break;
62610ad2	174	default:
	175	dev = NULL;
	176	err = -EINVAL;
	177	break;
	178	}
	179	if (!dev)
	180	goto err;
	181
	182	err = mac802154_netdev_register(phy, dev);
	183	if (err)
	184	goto err_free;
	185
	186	dev_hold(dev); /* we return an incremented device refcount */
	187	return dev;
	188
	189	err_free:
	190	free_netdev(dev);
	191	err:
	192	return ERR_PTR(err);
	193	}
	194
9b2777d6 PB	195	static int mac802154_set_txpower(struct wpan_phy *phy, int db)
	196	{
	197	struct mac802154_priv *priv = wpan_phy_priv(phy);
	198
9b2777d6 PB	199	return priv->ops->set_txpower(&priv->hw, db);
	200	}
	201
84dda3c6 PB	202	static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
	203	{
	204	struct mac802154_priv *priv = wpan_phy_priv(phy);
	205
84dda3c6 PB	206	return priv->ops->set_lbt(&priv->hw, on);
	207	}
	208
ba08fea5 PB	209	static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
	210	{
	211	struct mac802154_priv *priv = wpan_phy_priv(phy);
	212
ba08fea5 PB	213	return priv->ops->set_cca_mode(&priv->hw, mode);
	214	}
	215
6ca00197 PB	216	static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
	217	{
	218	struct mac802154_priv *priv = wpan_phy_priv(phy);
	219
6ca00197 PB	220	return priv->ops->set_cca_ed_level(&priv->hw, level);
	221	}
	222
4244db1b PB	223	static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
	224	u8 max_be, u8 retries)
	225	{
	226	struct mac802154_priv *priv = wpan_phy_priv(phy);
	227
4244db1b PB	228	return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
	229	}
	230
	231	static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
	232	{
	233	struct mac802154_priv *priv = wpan_phy_priv(phy);
	234
4244db1b PB	235	return priv->ops->set_frame_retries(&priv->hw, retries);
	236	}
	237
1010f540	238	struct ieee802154_dev *
	239	ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
	240	{
	241	struct wpan_phy *phy;
	242	struct mac802154_priv *priv;
	243	size_t priv_size;
	244
	245	if (!ops \|\| !ops->xmit \|\| !ops->ed \|\| !ops->start \|\|
	246	!ops->stop \|\| !ops->set_channel) {
83a1a7ce	247	pr_err("undefined IEEE802.15.4 device operations\n");
1010f540	248	return NULL;
	249	}
	250
	251	/* Ensure 32-byte alignment of our private data and hw private data.
	252	* We use the wpan_phy priv data for both our mac802154_priv and for
	253	* the driver's private data
	254	*
	255	* in memory it'll be like this:
	256	*
	257	* +-----------------------+
	258	* \| struct wpan_phy \|
	259	* +-----------------------+
	260	* \| struct mac802154_priv \|
	261	* +-----------------------+
	262	* \| driver's private data \|
	263	* +-----------------------+
	264	*
	265	* Due to ieee802154 layer isn't aware of driver and MAC structures,
139f14ad	266	* so lets align them here.
1010f540	267	*/
	268
	269	priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
	270
	271	phy = wpan_phy_alloc(priv_size);
	272	if (!phy) {
83a1a7ce	273	pr_err("failure to allocate master IEEE802.15.4 device\n");
1010f540	274	return NULL;
	275	}
	276
	277	priv = wpan_phy_priv(phy);
4710d806 VB	278	priv->phy = phy;
4710d806 VB	279	priv->hw.phy = priv->phy;
1010f540	280	priv->hw.priv = (char )priv + ALIGN(sizeof(priv), NETDEV_ALIGN);
	281	priv->ops = ops;
	282
	283	INIT_LIST_HEAD(&priv->slaves);
	284	mutex_init(&priv->slaves_mtx);
	285
	286	return &priv->hw;
	287	}
	288	EXPORT_SYMBOL(ieee802154_alloc_device);
	289
	290	void ieee802154_free_device(struct ieee802154_dev *hw)
	291	{
	292	struct mac802154_priv *priv = mac802154_to_priv(hw);
	293
62610ad2	294	BUG_ON(!list_empty(&priv->slaves));
62610ad2	295
1010f540	296	mutex_destroy(&priv->slaves_mtx);
1e9f9545 KK	297
1e9f9545 KK	298	wpan_phy_free(priv->phy);
1010f540	299	}
	300	EXPORT_SYMBOL(ieee802154_free_device);
	301
	302	int ieee802154_register_device(struct ieee802154_dev *dev)
	303	{
	304	struct mac802154_priv *priv = mac802154_to_priv(dev);
640985ec AA	305	int rc = -ENOSYS;
	306
	307	if (dev->flags & IEEE802154_HW_TXPOWER) {
	308	if (!priv->ops->set_txpower)
	309	goto out;
	310
	311	priv->phy->set_txpower = mac802154_set_txpower;
	312	}
	313
	314	if (dev->flags & IEEE802154_HW_LBT) {
	315	if (!priv->ops->set_lbt)
	316	goto out;
	317
	318	priv->phy->set_lbt = mac802154_set_lbt;
	319	}
	320
	321	if (dev->flags & IEEE802154_HW_CCA_MODE) {
	322	if (!priv->ops->set_cca_mode)
	323	goto out;
	324
	325	priv->phy->set_cca_mode = mac802154_set_cca_mode;
	326	}
	327
	328	if (dev->flags & IEEE802154_HW_CCA_ED_LEVEL) {
	329	if (!priv->ops->set_cca_ed_level)
	330	goto out;
	331
	332	priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
	333	}
	334
	335	if (dev->flags & IEEE802154_HW_CSMA_PARAMS) {
	336	if (!priv->ops->set_csma_params)
	337	goto out;
	338
	339	priv->phy->set_csma_params = mac802154_set_csma_params;
	340	}
	341
	342	if (dev->flags & IEEE802154_HW_FRAME_RETRIES) {
	343	if (!priv->ops->set_frame_retries)
	344	goto out;
	345
	346	priv->phy->set_frame_retries = mac802154_set_frame_retries;
	347	}
1010f540	348
	349	priv->dev_workqueue =
	350	create_singlethread_workqueue(wpan_phy_name(priv->phy));
640985ec AA	351	if (!priv->dev_workqueue) {
640985ec AA	352	rc = -ENOMEM;
1010f540	353	goto out;
640985ec	354	}
1010f540	355
	356	wpan_phy_set_dev(priv->phy, priv->hw.parent);
	357
62610ad2	358	priv->phy->add_iface = mac802154_add_iface;
	359	priv->phy->del_iface = mac802154_del_iface;
	360
1010f540	361	rc = wpan_phy_register(priv->phy);
	362	if (rc < 0)
	363	goto out_wq;
	364
	365	rtnl_lock();
	366
	367	mutex_lock(&priv->slaves_mtx);
	368	priv->running = MAC802154_DEVICE_RUN;
	369	mutex_unlock(&priv->slaves_mtx);
	370
	371	rtnl_unlock();
	372
	373	return 0;
	374
	375	out_wq:
	376	destroy_workqueue(priv->dev_workqueue);
	377	out:
	378	return rc;
	379	}
	380	EXPORT_SYMBOL(ieee802154_register_device);
	381
	382	void ieee802154_unregister_device(struct ieee802154_dev *dev)
	383	{
	384	struct mac802154_priv *priv = mac802154_to_priv(dev);
62610ad2	385	struct mac802154_sub_if_data sdata, next;
1010f540	386
	387	flush_workqueue(priv->dev_workqueue);
	388	destroy_workqueue(priv->dev_workqueue);
	389
	390	rtnl_lock();
	391
	392	mutex_lock(&priv->slaves_mtx);
	393	priv->running = MAC802154_DEVICE_STOPPED;
	394	mutex_unlock(&priv->slaves_mtx);
	395
62610ad2	396	list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
	397	mutex_lock(&sdata->hw->slaves_mtx);
	398	list_del(&sdata->list);
	399	mutex_unlock(&sdata->hw->slaves_mtx);
	400
	401	unregister_netdevice(sdata->dev);
	402	}
	403
1010f540	404	rtnl_unlock();
	405
	406	wpan_phy_unregister(priv->phy);
	407	}
	408	EXPORT_SYMBOL(ieee802154_unregister_device);
	409
	410	MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
	411	MODULE_LICENSE("GPL v2");