mac802154: allocation of ieee802154 device
An interface to allocate and register ieee802154 compatible device. The allocated device has the following representation in memory: +-----------------------+ | struct wpan_phy | +-----------------------+ | struct mac802154_priv | +-----------------------+ | driver's private data | +-----------------------+ Used by device drivers to register new instance in the stack. Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>wifi-calibration
alex.bluesman.smirnov@gmail.com
David S. Miller
parent
0afd7ad9de
commit
1010f54018
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@ -123,4 +123,11 @@ struct ieee802154_ops {
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u8 addr[IEEE802154_ADDR_LEN]);
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};
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/* Basic interface to register ieee802154 device */
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struct ieee802154_dev *
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ieee802154_alloc_device(size_t priv_data_lex, struct ieee802154_ops *ops);
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void ieee802154_free_device(struct ieee802154_dev *dev);
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int ieee802154_register_device(struct ieee802154_dev *dev);
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void ieee802154_unregister_device(struct ieee802154_dev *dev);
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#endif /* NET_MAC802154_H */
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@ -211,6 +211,7 @@ source "net/econet/Kconfig"
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source "net/wanrouter/Kconfig"
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source "net/phonet/Kconfig"
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source "net/ieee802154/Kconfig"
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source "net/mac802154/Kconfig"
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source "net/sched/Kconfig"
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source "net/dcb/Kconfig"
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source "net/dns_resolver/Kconfig"
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@ -60,6 +60,7 @@ ifneq ($(CONFIG_DCB),)
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obj-y += dcb/
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endif
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obj-$(CONFIG_IEEE802154) += ieee802154/
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obj-$(CONFIG_MAC802154) += mac802154/
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ifeq ($(CONFIG_NET),y)
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obj-$(CONFIG_SYSCTL) += sysctl_net.o
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@ -0,0 +1,16 @@
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config MAC802154
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tristate "Generic IEEE 802.15.4 Soft Networking Stack (mac802154)"
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depends on IEEE802154 && EXPERIMENTAL
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select CRC_CCITT
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---help---
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This option enables the hardware independent IEEE 802.15.4
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networking stack for SoftMAC devices (the ones implementing
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only PHY level of IEEE 802.15.4 standard).
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Note: this implementation is neither certified, nor feature
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complete! Compatibility with other implementations hasn't
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been tested yet!
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If you plan to use HardMAC IEEE 802.15.4 devices, you can
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say N here. Alternatievly you can say M to compile it as
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module.
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@ -0,0 +1,2 @@
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obj-$(CONFIG_MAC802154) += mac802154.o
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mac802154-objs := ieee802154_dev.o
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@ -0,0 +1,149 @@
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/*
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* Copyright (C) 2007-2012 Siemens AG
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*
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* Written by:
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*
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* Based on the code from 'linux-zigbee.sourceforge.net' project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <net/mac802154.h>
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#include <net/route.h>
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#include <net/wpan-phy.h>
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#include "mac802154.h"
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struct ieee802154_dev *
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ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
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{
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struct wpan_phy *phy;
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struct mac802154_priv *priv;
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size_t priv_size;
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if (!ops || !ops->xmit || !ops->ed || !ops->start ||
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!ops->stop || !ops->set_channel) {
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printk(KERN_ERR
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"undefined IEEE802.15.4 device operations\n");
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return NULL;
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}
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/* Ensure 32-byte alignment of our private data and hw private data.
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* We use the wpan_phy priv data for both our mac802154_priv and for
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* the driver's private data
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*
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* in memory it'll be like this:
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*
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* +-----------------------+
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* | struct wpan_phy |
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* +-----------------------+
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* | struct mac802154_priv |
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* +-----------------------+
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* | driver's private data |
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* +-----------------------+
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*
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* Due to ieee802154 layer isn't aware of driver and MAC structures,
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* so lets allign them here.
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*/
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priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
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phy = wpan_phy_alloc(priv_size);
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if (!phy) {
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printk(KERN_ERR
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"failure to allocate master IEEE802.15.4 device\n");
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return NULL;
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}
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priv = wpan_phy_priv(phy);
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priv->hw.phy = priv->phy = phy;
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priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
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priv->ops = ops;
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INIT_LIST_HEAD(&priv->slaves);
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mutex_init(&priv->slaves_mtx);
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return &priv->hw;
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}
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EXPORT_SYMBOL(ieee802154_alloc_device);
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void ieee802154_free_device(struct ieee802154_dev *hw)
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{
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struct mac802154_priv *priv = mac802154_to_priv(hw);
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wpan_phy_free(priv->phy);
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mutex_destroy(&priv->slaves_mtx);
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}
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EXPORT_SYMBOL(ieee802154_free_device);
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int ieee802154_register_device(struct ieee802154_dev *dev)
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{
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struct mac802154_priv *priv = mac802154_to_priv(dev);
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int rc = -ENOMEM;
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priv->dev_workqueue =
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create_singlethread_workqueue(wpan_phy_name(priv->phy));
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if (!priv->dev_workqueue)
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goto out;
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wpan_phy_set_dev(priv->phy, priv->hw.parent);
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rc = wpan_phy_register(priv->phy);
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if (rc < 0)
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goto out_wq;
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rtnl_lock();
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mutex_lock(&priv->slaves_mtx);
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priv->running = MAC802154_DEVICE_RUN;
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mutex_unlock(&priv->slaves_mtx);
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rtnl_unlock();
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return 0;
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out_wq:
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destroy_workqueue(priv->dev_workqueue);
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out:
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return rc;
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}
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EXPORT_SYMBOL(ieee802154_register_device);
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void ieee802154_unregister_device(struct ieee802154_dev *dev)
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{
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struct mac802154_priv *priv = mac802154_to_priv(dev);
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flush_workqueue(priv->dev_workqueue);
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destroy_workqueue(priv->dev_workqueue);
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rtnl_lock();
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mutex_lock(&priv->slaves_mtx);
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priv->running = MAC802154_DEVICE_STOPPED;
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mutex_unlock(&priv->slaves_mtx);
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rtnl_unlock();
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wpan_phy_unregister(priv->phy);
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}
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EXPORT_SYMBOL(ieee802154_unregister_device);
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MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
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MODULE_LICENSE("GPL v2");
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@ -0,0 +1,63 @@
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/*
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* Copyright (C) 2007-2012 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Written by:
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* Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#ifndef MAC802154_H
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#define MAC802154_H
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/* mac802154 device private data */
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struct mac802154_priv {
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struct ieee802154_dev hw;
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struct ieee802154_ops *ops;
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/* ieee802154 phy */
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struct wpan_phy *phy;
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int open_count;
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/* As in mac80211 slaves list is modified:
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* 1) under the RTNL
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* 2) protected by slaves_mtx;
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* 3) in an RCU manner
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*
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* So atomic readers can use any of this protection methods.
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*/
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struct list_head slaves;
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struct mutex slaves_mtx;
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/* This one is used for scanning and other jobs not to be interfered
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* with serial driver.
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*/
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struct workqueue_struct *dev_workqueue;
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/* SoftMAC device is registered and running. One can add subinterfaces.
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* This flag should be modified under slaves_mtx and RTNL, so you can
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* read them using any of protection methods.
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*/
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bool running;
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};
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#define MAC802154_DEVICE_STOPPED 0x00
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#define MAC802154_DEVICE_RUN 0x01
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#define mac802154_to_priv(_hw) container_of(_hw, struct mac802154_priv, hw)
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#endif /* MAC802154_H */
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