drivers/net/ieee802154/fakelb.c - kernel/msm-4.9 - Gitiles

 /*
  * Loopback IEEE 802.15.4 interface
  *
  * Copyright 2007-2012 Siemens AG
  *
  * 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.
  *
  * Written by:
  * Sergey Lapin <slapin@ossfans.org>
  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
  * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
  */

 #include <linux/module.h>
 #include <linux/timer.h>
 #include <linux/platform_device.h>
 #include <linux/netdevice.h>
 #include <linux/device.h>
 #include <linux/spinlock.h>
 #include <net/mac802154.h>
 #include <net/wpan-phy.h>

 static int numlbs = 1;

 struct fakelb_dev_priv {
 	struct ieee802154_dev *dev;

 	struct list_head list;
 	struct fakelb_priv *fake;

 	spinlock_t lock;
 	bool working;
 };

 struct fakelb_priv {
 	struct list_head list;
 	rwlock_t lock;
 };

 static int
 fakelb_hw_ed(struct ieee802154_dev *dev, u8 *level)
 {
 	might_sleep();
 	BUG_ON(!level);
 	*level = 0xbe;

 	return 0;
 }

 static int
 fakelb_hw_channel(struct ieee802154_dev *dev, int page, int channel)
 {
 	pr_debug("set channel to %d\n", channel);

 	might_sleep();
 	dev->phy->current_page = page;
 	dev->phy->current_channel = channel;

 	return 0;
 }

 static void
 fakelb_hw_deliver(struct fakelb_dev_priv *priv, struct sk_buff *skb)
 {
 	struct sk_buff *newskb;

 	spin_lock(&priv->lock);
 	if (priv->working) {
 		newskb = pskb_copy(skb, GFP_ATOMIC);
 		ieee802154_rx_irqsafe(priv->dev, newskb, 0xcc);
 	}
 	spin_unlock(&priv->lock);
 }

 static int
 fakelb_hw_xmit(struct ieee802154_dev *dev, struct sk_buff *skb)
 {
 	struct fakelb_dev_priv *priv = dev->priv;
 	struct fakelb_priv *fake = priv->fake;

 	might_sleep();

 	read_lock_bh(&fake->lock);
 	if (priv->list.next == priv->list.prev) {
 		/* we are the only one device */
 		fakelb_hw_deliver(priv, skb);
 	} else {
 		struct fakelb_dev_priv *dp;
 		list_for_each_entry(dp, &priv->fake->list, list) {
 			if (dp != priv &&
 			    (dp->dev->phy->current_channel ==
 			     priv->dev->phy->current_channel))
 				fakelb_hw_deliver(dp, skb);
 		}
 	}
 	read_unlock_bh(&fake->lock);

 	return 0;
 }

 static int
 fakelb_hw_start(struct ieee802154_dev *dev) {
 	struct fakelb_dev_priv *priv = dev->priv;
 	int ret = 0;

 	spin_lock(&priv->lock);
 	if (priv->working)
 		ret = -EBUSY;
 	else
 		priv->working = 1;
 	spin_unlock(&priv->lock);

 	return ret;
 }

 static void
 fakelb_hw_stop(struct ieee802154_dev *dev) {
 	struct fakelb_dev_priv *priv = dev->priv;

 	spin_lock(&priv->lock);
 	priv->working = 0;
 	spin_unlock(&priv->lock);
 }

 static struct ieee802154_ops fakelb_ops = {
 	.owner = THIS_MODULE,
 	.xmit = fakelb_hw_xmit,
 	.ed = fakelb_hw_ed,
 	.set_channel = fakelb_hw_channel,
 	.start = fakelb_hw_start,
 	.stop = fakelb_hw_stop,
 };

 /* Number of dummy devices to be set up by this module. */
 module_param(numlbs, int, 0);
 MODULE_PARM_DESC(numlbs, " number of pseudo devices");

 static int fakelb_add_one(struct device *dev, struct fakelb_priv *fake)
 {
 	struct fakelb_dev_priv *priv;
 	int err;
 	struct ieee802154_dev *ieee;

 	ieee = ieee802154_alloc_device(sizeof(*priv), &fakelb_ops);
 	if (!ieee)
 		return -ENOMEM;

 	priv = ieee->priv;
 	priv->dev = ieee;

 	/* 868 MHz BPSK	802.15.4-2003 */
 	ieee->phy->channels_supported[0] |= 1;
 	/* 915 MHz BPSK	802.15.4-2003 */
 	ieee->phy->channels_supported[0] |= 0x7fe;
 	/* 2.4 GHz O-QPSK 802.15.4-2003 */
 	ieee->phy->channels_supported[0] |= 0x7FFF800;
 	/* 868 MHz ASK 802.15.4-2006 */
 	ieee->phy->channels_supported[1] |= 1;
 	/* 915 MHz ASK 802.15.4-2006 */
 	ieee->phy->channels_supported[1] |= 0x7fe;
 	/* 868 MHz O-QPSK 802.15.4-2006 */
 	ieee->phy->channels_supported[2] |= 1;
 	/* 915 MHz O-QPSK 802.15.4-2006 */
 	ieee->phy->channels_supported[2] |= 0x7fe;
 	/* 2.4 GHz CSS 802.15.4a-2007 */
 	ieee->phy->channels_supported[3] |= 0x3fff;
 	/* UWB Sub-gigahertz 802.15.4a-2007 */
 	ieee->phy->channels_supported[4] |= 1;
 	/* UWB Low band 802.15.4a-2007 */
 	ieee->phy->channels_supported[4] |= 0x1e;
 	/* UWB High band 802.15.4a-2007 */
 	ieee->phy->channels_supported[4] |= 0xffe0;
 	/* 750 MHz O-QPSK 802.15.4c-2009 */
 	ieee->phy->channels_supported[5] |= 0xf;
 	/* 750 MHz MPSK 802.15.4c-2009 */
 	ieee->phy->channels_supported[5] |= 0xf0;
 	/* 950 MHz BPSK 802.15.4d-2009 */
 	ieee->phy->channels_supported[6] |= 0x3ff;
 	/* 950 MHz GFSK 802.15.4d-2009 */
 	ieee->phy->channels_supported[6] |= 0x3ffc00;

 	INIT_LIST_HEAD(&priv->list);
 	priv->fake = fake;

 	spin_lock_init(&priv->lock);

 	ieee->parent = dev;

 	err = ieee802154_register_device(ieee);
 	if (err)
 		goto err_reg;

 	write_lock_bh(&fake->lock);
 	list_add_tail(&priv->list, &fake->list);
 	write_unlock_bh(&fake->lock);

 	return 0;

 err_reg:
 	ieee802154_free_device(priv->dev);
 	return err;
 }

 static void fakelb_del(struct fakelb_dev_priv *priv)
 {
 	write_lock_bh(&priv->fake->lock);
 	list_del(&priv->list);
 	write_unlock_bh(&priv->fake->lock);

 	ieee802154_unregister_device(priv->dev);
 	ieee802154_free_device(priv->dev);
 }

 static int fakelb_probe(struct platform_device *pdev)
 {
 	struct fakelb_priv *priv;
 	struct fakelb_dev_priv *dp;
 	int err = -ENOMEM;
 	int i;

 	priv = devm_kzalloc(&pdev->dev, sizeof(struct fakelb_priv),
 			    GFP_KERNEL);
 	if (!priv)
 		goto err_alloc;

 	INIT_LIST_HEAD(&priv->list);
 	rwlock_init(&priv->lock);

 	for (i = 0; i < numlbs; i++) {
 		err = fakelb_add_one(&pdev->dev, priv);
 		if (err < 0)
 			goto err_slave;
 	}

 	platform_set_drvdata(pdev, priv);
 	dev_info(&pdev->dev, "added ieee802154 hardware\n");
 	return 0;

 err_slave:
 	list_for_each_entry(dp, &priv->list, list)
 		fakelb_del(dp);
 err_alloc:
 	return err;
 }

 static int fakelb_remove(struct platform_device *pdev)
 {
 	struct fakelb_priv *priv = platform_get_drvdata(pdev);
 	struct fakelb_dev_priv *dp, *temp;

 	list_for_each_entry_safe(dp, temp, &priv->list, list)
 		fakelb_del(dp);

 	return 0;
 }

 static struct platform_device *ieee802154fake_dev;

 static struct platform_driver ieee802154fake_driver = {
 	.probe = fakelb_probe,
 	.remove = fakelb_remove,
 	.driver = {
 			.name = "ieee802154fakelb",
 			.owner = THIS_MODULE,
 	},
 };

 static __init int fakelb_init_module(void)
 {
 	ieee802154fake_dev = platform_device_register_simple(
 			     "ieee802154fakelb", -1, NULL, 0);
 	return platform_driver_register(&ieee802154fake_driver);
 }

 static __exit void fake_remove_module(void)
 {
 	platform_driver_unregister(&ieee802154fake_driver);
 	platform_device_unregister(ieee802154fake_dev);
 }

 module_init(fakelb_init_module);
 module_exit(fake_remove_module);
 MODULE_LICENSE("GPL");
	/*
	* Loopback IEEE 802.15.4 interface
	*
	* Copyright 2007-2012 Siemens AG
	*
	* 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.
	*
	* Written by:
	* Sergey Lapin <slapin@ossfans.org>
	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	*/

	#include <linux/module.h>
	#include <linux/timer.h>
	#include <linux/platform_device.h>
	#include <linux/netdevice.h>
	#include <linux/device.h>
	#include <linux/spinlock.h>
	#include <net/mac802154.h>
	#include <net/wpan-phy.h>

	static int numlbs = 1;

	struct fakelb_dev_priv {
	struct ieee802154_dev *dev;

	struct list_head list;
	struct fakelb_priv *fake;

	spinlock_t lock;
	bool working;
	};

	struct fakelb_priv {
	struct list_head list;
	rwlock_t lock;
	};

	static int
	fakelb_hw_ed(struct ieee802154_dev dev, u8 level)
	{
	might_sleep();
	BUG_ON(!level);
	*level = 0xbe;

	return 0;
	}

	static int
	fakelb_hw_channel(struct ieee802154_dev *dev, int page, int channel)
	{
	pr_debug("set channel to %d\n", channel);

	might_sleep();
	dev->phy->current_page = page;
	dev->phy->current_channel = channel;

	return 0;
	}

	static void
	fakelb_hw_deliver(struct fakelb_dev_priv priv, struct sk_buff skb)
	{
	struct sk_buff *newskb;

	spin_lock(&priv->lock);
	if (priv->working) {
	newskb = pskb_copy(skb, GFP_ATOMIC);
	ieee802154_rx_irqsafe(priv->dev, newskb, 0xcc);
	}
	spin_unlock(&priv->lock);
	}

	static int
	fakelb_hw_xmit(struct ieee802154_dev dev, struct sk_buff skb)
	{
	struct fakelb_dev_priv *priv = dev->priv;
	struct fakelb_priv *fake = priv->fake;

	might_sleep();

	read_lock_bh(&fake->lock);
	if (priv->list.next == priv->list.prev) {
	/* we are the only one device */
	fakelb_hw_deliver(priv, skb);
	} else {
	struct fakelb_dev_priv *dp;
	list_for_each_entry(dp, &priv->fake->list, list) {
	if (dp != priv &&
	(dp->dev->phy->current_channel ==
	priv->dev->phy->current_channel))
	fakelb_hw_deliver(dp, skb);
	}
	}
	read_unlock_bh(&fake->lock);

	return 0;
	}

	static int
	fakelb_hw_start(struct ieee802154_dev *dev) {
	struct fakelb_dev_priv *priv = dev->priv;
	int ret = 0;

	spin_lock(&priv->lock);
	if (priv->working)
	ret = -EBUSY;
	else
	priv->working = 1;
	spin_unlock(&priv->lock);

	return ret;
	}

	static void
	fakelb_hw_stop(struct ieee802154_dev *dev) {
	struct fakelb_dev_priv *priv = dev->priv;

	spin_lock(&priv->lock);
	priv->working = 0;
	spin_unlock(&priv->lock);
	}

	static struct ieee802154_ops fakelb_ops = {
	.owner = THIS_MODULE,
	.xmit = fakelb_hw_xmit,
	.ed = fakelb_hw_ed,
	.set_channel = fakelb_hw_channel,
	.start = fakelb_hw_start,
	.stop = fakelb_hw_stop,
	};

	/* Number of dummy devices to be set up by this module. */
	module_param(numlbs, int, 0);
	MODULE_PARM_DESC(numlbs, " number of pseudo devices");

	static int fakelb_add_one(struct device dev, struct fakelb_priv fake)
	{
	struct fakelb_dev_priv *priv;
	int err;
	struct ieee802154_dev *ieee;

	ieee = ieee802154_alloc_device(sizeof(*priv), &fakelb_ops);
	if (!ieee)
	return -ENOMEM;

	priv = ieee->priv;
	priv->dev = ieee;

	/* 868 MHz BPSK 802.15.4-2003 */
	ieee->phy->channels_supported[0] \|= 1;
	/* 915 MHz BPSK 802.15.4-2003 */
	ieee->phy->channels_supported[0] \|= 0x7fe;
	/* 2.4 GHz O-QPSK 802.15.4-2003 */
	ieee->phy->channels_supported[0] \|= 0x7FFF800;
	/* 868 MHz ASK 802.15.4-2006 */
	ieee->phy->channels_supported[1] \|= 1;
	/* 915 MHz ASK 802.15.4-2006 */
	ieee->phy->channels_supported[1] \|= 0x7fe;
	/* 868 MHz O-QPSK 802.15.4-2006 */
	ieee->phy->channels_supported[2] \|= 1;
	/* 915 MHz O-QPSK 802.15.4-2006 */
	ieee->phy->channels_supported[2] \|= 0x7fe;
	/* 2.4 GHz CSS 802.15.4a-2007 */
	ieee->phy->channels_supported[3] \|= 0x3fff;
	/* UWB Sub-gigahertz 802.15.4a-2007 */
	ieee->phy->channels_supported[4] \|= 1;
	/* UWB Low band 802.15.4a-2007 */
	ieee->phy->channels_supported[4] \|= 0x1e;
	/* UWB High band 802.15.4a-2007 */
	ieee->phy->channels_supported[4] \|= 0xffe0;
	/* 750 MHz O-QPSK 802.15.4c-2009 */
	ieee->phy->channels_supported[5] \|= 0xf;
	/* 750 MHz MPSK 802.15.4c-2009 */
	ieee->phy->channels_supported[5] \|= 0xf0;
	/* 950 MHz BPSK 802.15.4d-2009 */
	ieee->phy->channels_supported[6] \|= 0x3ff;
	/* 950 MHz GFSK 802.15.4d-2009 */
	ieee->phy->channels_supported[6] \|= 0x3ffc00;

	INIT_LIST_HEAD(&priv->list);
	priv->fake = fake;

	spin_lock_init(&priv->lock);

	ieee->parent = dev;

	err = ieee802154_register_device(ieee);
	if (err)
	goto err_reg;

	write_lock_bh(&fake->lock);
	list_add_tail(&priv->list, &fake->list);
	write_unlock_bh(&fake->lock);

	return 0;

	err_reg:
	ieee802154_free_device(priv->dev);
	return err;
	}

	static void fakelb_del(struct fakelb_dev_priv *priv)
	{
	write_lock_bh(&priv->fake->lock);
	list_del(&priv->list);
	write_unlock_bh(&priv->fake->lock);

	ieee802154_unregister_device(priv->dev);
	ieee802154_free_device(priv->dev);
	}

	static int fakelb_probe(struct platform_device *pdev)
	{
	struct fakelb_priv *priv;
	struct fakelb_dev_priv *dp;
	int err = -ENOMEM;
	int i;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct fakelb_priv),
	GFP_KERNEL);
	if (!priv)
	goto err_alloc;

	INIT_LIST_HEAD(&priv->list);
	rwlock_init(&priv->lock);

	for (i = 0; i < numlbs; i++) {
	err = fakelb_add_one(&pdev->dev, priv);
	if (err < 0)
	goto err_slave;
	}

	platform_set_drvdata(pdev, priv);
	dev_info(&pdev->dev, "added ieee802154 hardware\n");
	return 0;

	err_slave:
	list_for_each_entry(dp, &priv->list, list)
	fakelb_del(dp);
	err_alloc:
	return err;
	}

	static int fakelb_remove(struct platform_device *pdev)
	{
	struct fakelb_priv *priv = platform_get_drvdata(pdev);
	struct fakelb_dev_priv dp, temp;

	list_for_each_entry_safe(dp, temp, &priv->list, list)
	fakelb_del(dp);

	return 0;
	}

	static struct platform_device *ieee802154fake_dev;

	static struct platform_driver ieee802154fake_driver = {
	.probe = fakelb_probe,
	.remove = fakelb_remove,
	.driver = {
	.name = "ieee802154fakelb",
	.owner = THIS_MODULE,
	},
	};

	static __init int fakelb_init_module(void)
	{
	ieee802154fake_dev = platform_device_register_simple(
	"ieee802154fakelb", -1, NULL, 0);
	return platform_driver_register(&ieee802154fake_driver);
	}

	static __exit void fake_remove_module(void)
	{
	platform_driver_unregister(&ieee802154fake_driver);
	platform_device_unregister(ieee802154fake_dev);
	}

	module_init(fakelb_init_module);
	module_exit(fake_remove_module);
	MODULE_LICENSE("GPL");