net/mac802154/ieee802154_dev.c - kernel/msm-4.9 - Gitiles

 /*
  * 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.
  *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */

 #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/wpan-phy.h>

 #include "mac802154.h"

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

 	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;

 	netif_stop_queue(dev);

 	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, mac802154_monitor_setup);
 		break;
 	case IEEE802154_DEV_WPAN:
 		dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
 				   name, 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);

 	if (!priv->ops->set_txpower)
 		return -ENOTSUPP;

 	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);

 	if (!priv->ops->set_lbt)
 		return -ENOTSUPP;

 	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);

 	if (!priv->ops->set_cca_mode)
 		return -ENOTSUPP;

 	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);

 	if (!priv->ops->set_cca_ed_level)
 		return -ENOTSUPP;

 	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);

 	if (!priv->ops->set_csma_params)
 		return -ENOTSUPP;

 	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);

 	if (!priv->ops->set_frame_retries)
 		return -ENOTSUPP;

 	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 allign 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->hw.phy = priv->phy = 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 = -ENOMEM;

 	priv->dev_workqueue =
 		create_singlethread_workqueue(wpan_phy_name(priv->phy));
 	if (!priv->dev_workqueue)
 		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;
 	priv->phy->set_txpower = mac802154_set_txpower;
 	priv->phy->set_lbt = mac802154_set_lbt;
 	priv->phy->set_cca_mode = mac802154_set_cca_mode;
 	priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
 	priv->phy->set_csma_params = mac802154_set_csma_params;
 	priv->phy->set_frame_retries = mac802154_set_frame_retries;

 	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");
	/*
	* 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.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*/

	#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/wpan-phy.h>

	#include "mac802154.h"

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

	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;

	netif_stop_queue(dev);

	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, mac802154_monitor_setup);
	break;
	case IEEE802154_DEV_WPAN:
	dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
	name, 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);

	if (!priv->ops->set_txpower)
	return -ENOTSUPP;

	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);

	if (!priv->ops->set_lbt)
	return -ENOTSUPP;

	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);

	if (!priv->ops->set_cca_mode)
	return -ENOTSUPP;

	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);

	if (!priv->ops->set_cca_ed_level)
	return -ENOTSUPP;

	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);

	if (!priv->ops->set_csma_params)
	return -ENOTSUPP;

	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);

	if (!priv->ops->set_frame_retries)
	return -ENOTSUPP;

	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 allign 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->hw.phy = priv->phy = 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 = -ENOMEM;

	priv->dev_workqueue =
	create_singlethread_workqueue(wpan_phy_name(priv->phy));
	if (!priv->dev_workqueue)
	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;
	priv->phy->set_txpower = mac802154_set_txpower;
	priv->phy->set_lbt = mac802154_set_lbt;
	priv->phy->set_cca_mode = mac802154_set_cca_mode;
	priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
	priv->phy->set_csma_params = mac802154_set_csma_params;
	priv->phy->set_frame_retries = mac802154_set_frame_retries;

	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");