1 files changed, 265 insertions, 0 deletions
diff --git a/net/mac802154/main.c b/net/mac802154/main.c
new file mode 100644
index 000000000000..86e533ed3775
--- /dev/null
+++ b/net/mac802154/main.c
@@ -0,0 +1,265 @@
+/*
+ * 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"
+
+static int
+mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
+{
+	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
+	struct ieee802154_local *local;
+	int err;
+
+	local = wpan_phy_priv(phy);
+
+	sdata->dev = dev;
+	sdata->local = local;
+
+	dev->needed_headroom = local->hw.extra_tx_headroom;
+
+	SET_NETDEV_DEV(dev, &local->phy->dev);
+
+	err = register_netdev(dev);
+	if (err < 0)
+		return err;
+
+	rtnl_lock();
+	mutex_lock(&local->iflist_mtx);
+	list_add_tail_rcu(&sdata->list, &local->interfaces);
+	mutex_unlock(&local->iflist_mtx);
+	rtnl_unlock();
+
+	return 0;
+}
+
+static void
+mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev)
+{
+	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
+
+	ASSERT_RTNL();
+
+	BUG_ON(sdata->local->phy != phy);
+
+	mutex_lock(&sdata->local->iflist_mtx);
+	list_del_rcu(&sdata->list);
+	mutex_unlock(&sdata->local->iflist_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 ieee802154_sub_if_data),
+				   name, NET_NAME_UNKNOWN,
+				   mac802154_monitor_setup);
+		break;
+	case IEEE802154_DEV_WPAN:
+		dev = alloc_netdev(sizeof(struct ieee802154_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 void ieee802154_tasklet_handler(unsigned long data)
+{
+	struct ieee802154_local *local = (struct ieee802154_local *)data;
+	struct sk_buff *skb;
+
+	while ((skb = skb_dequeue(&local->skb_queue))) {
+		switch (skb->pkt_type) {
+		case IEEE802154_RX_MSG:
+			/* Clear skb->pkt_type in order to not confuse kernel
+			 * netstack.
+			 */
+			skb->pkt_type = 0;
+			ieee802154_rx(&local->hw, skb);
+			break;
+		default:
+			WARN(1, "mac802154: Packet is of unknown type %d\n",
+			     skb->pkt_type);
+			kfree_skb(skb);
+			break;
+		}
+	}
+}
+
+struct ieee802154_hw *
+ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
+{
+	struct wpan_phy *phy;
+	struct ieee802154_local *local;
+	size_t priv_size;
+
+	if (!ops || !(ops->xmit_async || ops->xmit_sync) || !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 ieee802154_local and for
+	 * the driver's private data
+	 *
+	 * in memory it'll be like this:
+	 *
+	 * +-------------------------+
+	 * | struct wpan_phy         |
+	 * +-------------------------+
+	 * | struct ieee802154_local |
+	 * +-------------------------+
+	 * | 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(*local), 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;
+	}
+
+	local = wpan_phy_priv(phy);
+	local->phy = phy;
+	local->hw.phy = local->phy;
+	local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
+	local->ops = ops;
+
+	INIT_LIST_HEAD(&local->interfaces);
+	mutex_init(&local->iflist_mtx);
+
+	tasklet_init(&local->tasklet,
+		     ieee802154_tasklet_handler,
+		     (unsigned long)local);
+
+	skb_queue_head_init(&local->skb_queue);
+
+	return &local->hw;
+}
+EXPORT_SYMBOL(ieee802154_alloc_hw);
+
+void ieee802154_free_hw(struct ieee802154_hw *hw)
+{
+	struct ieee802154_local *local = hw_to_local(hw);
+
+	BUG_ON(!list_empty(&local->interfaces));
+
+	mutex_destroy(&local->iflist_mtx);
+
+	wpan_phy_free(local->phy);
+}
+EXPORT_SYMBOL(ieee802154_free_hw);
+
+int ieee802154_register_hw(struct ieee802154_hw *hw)
+{
+	struct ieee802154_local *local = hw_to_local(hw);
+	int rc = -ENOSYS;
+
+	local->workqueue =
+		create_singlethread_workqueue(wpan_phy_name(local->phy));
+	if (!local->workqueue) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	wpan_phy_set_dev(local->phy, local->hw.parent);
+
+	local->phy->add_iface = mac802154_add_iface;
+	local->phy->del_iface = mac802154_del_iface;
+
+	rc = wpan_phy_register(local->phy);
+	if (rc < 0)
+		goto out_wq;
+
+	return 0;
+
+out_wq:
+	destroy_workqueue(local->workqueue);
+out:
+	return rc;
+}
+EXPORT_SYMBOL(ieee802154_register_hw);
+
+void ieee802154_unregister_hw(struct ieee802154_hw *hw)
+{
+	struct ieee802154_local *local = hw_to_local(hw);
+	struct ieee802154_sub_if_data *sdata, *next;
+
+	tasklet_kill(&local->tasklet);
+	flush_workqueue(local->workqueue);
+	destroy_workqueue(local->workqueue);
+
+	rtnl_lock();
+
+	list_for_each_entry_safe(sdata, next, &local->interfaces, list) {
+		mutex_lock(&sdata->local->iflist_mtx);
+		list_del(&sdata->list);
+		mutex_unlock(&sdata->local->iflist_mtx);
+
+		unregister_netdevice(sdata->dev);
+	}
+
+	rtnl_unlock();
+
+	wpan_phy_unregister(local->phy);
+}
+EXPORT_SYMBOL(ieee802154_unregister_hw);
+
+MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
+MODULE_LICENSE("GPL v2");