2012-05-15 22:50:20 +02:00
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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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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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2012-05-15 22:50:28 +02:00
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#include <net/netlink.h>
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#include <linux/nl802154.h>
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2012-05-15 22:50:20 +02:00
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#include <net/mac802154.h>
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2014-03-14 21:23:59 +01:00
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#include <net/ieee802154_netdev.h>
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2012-05-15 22:50:20 +02:00
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#include <net/route.h>
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2014-10-25 09:41:02 +02:00
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#include <net/cfg802154.h>
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2012-05-15 22:50:20 +02:00
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2014-10-25 09:41:00 +02:00
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#include "ieee802154_i.h"
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2014-11-02 04:18:36 +01:00
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#include "cfg.h"
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2012-05-15 22:50:20 +02:00
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2014-10-27 17:13:30 +01:00
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static void ieee802154_tasklet_handler(unsigned long data)
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{
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struct ieee802154_local *local = (struct ieee802154_local *)data;
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struct sk_buff *skb;
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while ((skb = skb_dequeue(&local->skb_queue))) {
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switch (skb->pkt_type) {
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case IEEE802154_RX_MSG:
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/* Clear skb->pkt_type in order to not confuse kernel
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* netstack.
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*/
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skb->pkt_type = 0;
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ieee802154_rx(&local->hw, skb);
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break;
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default:
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WARN(1, "mac802154: Packet is of unknown type %d\n",
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skb->pkt_type);
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kfree_skb(skb);
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break;
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}
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}
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}
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2014-10-25 17:16:34 +02:00
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struct ieee802154_hw *
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2014-10-28 18:21:18 +01:00
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ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
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2012-05-15 22:50:20 +02:00
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{
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struct wpan_phy *phy;
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2014-10-25 17:16:35 +02:00
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struct ieee802154_local *local;
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2012-05-15 22:50:20 +02:00
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size_t priv_size;
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2014-10-26 09:37:08 +01:00
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if (!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed ||
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!ops->start || !ops->stop || !ops->set_channel) {
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2013-10-30 08:28:07 +01:00
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pr_err("undefined IEEE802.15.4 device operations\n");
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2012-05-15 22:50:20 +02:00
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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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2014-10-25 17:16:35 +02:00
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* We use the wpan_phy priv data for both our ieee802154_local and for
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2012-05-15 22:50:20 +02:00
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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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2014-10-25 17:16:35 +02:00
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* +-------------------------+
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* | struct wpan_phy |
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* +-------------------------+
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* | struct ieee802154_local |
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* +-------------------------+
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* | driver's private data |
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* +-------------------------+
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2012-05-15 22:50:20 +02:00
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*
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* Due to ieee802154 layer isn't aware of driver and MAC structures,
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2014-10-25 05:25:08 +02:00
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* so lets align them here.
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2012-05-15 22:50:20 +02:00
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*/
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2014-10-25 17:16:35 +02:00
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priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
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2012-05-15 22:50:20 +02:00
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2014-11-09 08:36:47 +01:00
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phy = wpan_phy_new(&mac802154_config_ops, priv_size);
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2012-05-15 22:50:20 +02:00
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if (!phy) {
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2013-10-30 08:28:07 +01:00
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pr_err("failure to allocate master IEEE802.15.4 device\n");
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2012-05-15 22:50:20 +02:00
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return NULL;
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}
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2014-11-12 03:36:51 +01:00
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phy->privid = mac802154_wpan_phy_privid;
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2014-10-25 17:16:35 +02:00
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local = wpan_phy_priv(phy);
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local->phy = phy;
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local->hw.phy = local->phy;
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local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
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local->ops = ops;
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2012-05-15 22:50:20 +02:00
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2014-10-25 17:16:38 +02:00
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INIT_LIST_HEAD(&local->interfaces);
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mutex_init(&local->iflist_mtx);
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2012-05-15 22:50:20 +02:00
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2014-10-27 17:13:30 +01:00
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tasklet_init(&local->tasklet,
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ieee802154_tasklet_handler,
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(unsigned long)local);
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skb_queue_head_init(&local->skb_queue);
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2014-10-25 17:16:35 +02:00
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return &local->hw;
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2012-05-15 22:50:20 +02:00
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}
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2014-10-25 17:16:34 +02:00
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EXPORT_SYMBOL(ieee802154_alloc_hw);
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2012-05-15 22:50:20 +02:00
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2014-10-25 17:16:34 +02:00
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void ieee802154_free_hw(struct ieee802154_hw *hw)
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2012-05-15 22:50:20 +02:00
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{
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2014-10-25 17:16:39 +02:00
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struct ieee802154_local *local = hw_to_local(hw);
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2012-05-15 22:50:20 +02:00
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2014-10-25 17:16:38 +02:00
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BUG_ON(!list_empty(&local->interfaces));
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2012-05-15 22:50:28 +02:00
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2014-10-25 17:16:38 +02:00
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mutex_destroy(&local->iflist_mtx);
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2012-12-14 02:03:03 +01:00
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2014-10-25 17:16:35 +02:00
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wpan_phy_free(local->phy);
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2012-05-15 22:50:20 +02:00
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}
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2014-10-25 17:16:34 +02:00
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EXPORT_SYMBOL(ieee802154_free_hw);
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2012-05-15 22:50:20 +02:00
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2014-10-25 17:16:34 +02:00
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int ieee802154_register_hw(struct ieee802154_hw *hw)
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2012-05-15 22:50:20 +02:00
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{
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2014-10-25 17:16:39 +02:00
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struct ieee802154_local *local = hw_to_local(hw);
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2014-11-05 20:51:19 +01:00
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struct net_device *dev;
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2014-07-03 00:20:43 +02:00
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int rc = -ENOSYS;
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2014-10-25 17:16:41 +02:00
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local->workqueue =
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2014-10-25 17:16:35 +02:00
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create_singlethread_workqueue(wpan_phy_name(local->phy));
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2014-10-25 17:16:41 +02:00
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if (!local->workqueue) {
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2014-07-03 00:20:43 +02:00
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rc = -ENOMEM;
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2012-05-15 22:50:20 +02:00
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goto out;
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2014-07-03 00:20:43 +02:00
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}
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2012-05-15 22:50:20 +02:00
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2014-10-25 17:16:35 +02:00
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wpan_phy_set_dev(local->phy, local->hw.parent);
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2012-05-15 22:50:20 +02:00
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2014-10-25 17:16:35 +02:00
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rc = wpan_phy_register(local->phy);
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2012-05-15 22:50:20 +02:00
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if (rc < 0)
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goto out_wq;
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2014-11-05 20:51:19 +01:00
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rtnl_lock();
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dev = ieee802154_if_add(local, "wpan%d", NULL, IEEE802154_DEV_WPAN);
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if (IS_ERR(dev)) {
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rtnl_unlock();
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rc = PTR_ERR(dev);
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goto out_wq;
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}
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rtnl_unlock();
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2012-05-15 22:50:20 +02:00
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return 0;
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out_wq:
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2014-10-25 17:16:41 +02:00
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destroy_workqueue(local->workqueue);
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2012-05-15 22:50:20 +02:00
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out:
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return rc;
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}
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2014-10-25 17:16:34 +02:00
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EXPORT_SYMBOL(ieee802154_register_hw);
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2012-05-15 22:50:20 +02:00
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2014-10-25 17:16:34 +02:00
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void ieee802154_unregister_hw(struct ieee802154_hw *hw)
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2012-05-15 22:50:20 +02:00
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{
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2014-10-25 17:16:39 +02:00
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struct ieee802154_local *local = hw_to_local(hw);
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2012-05-15 22:50:20 +02:00
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2014-10-27 17:13:30 +01:00
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tasklet_kill(&local->tasklet);
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2014-10-25 17:16:41 +02:00
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flush_workqueue(local->workqueue);
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destroy_workqueue(local->workqueue);
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2012-05-15 22:50:20 +02:00
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rtnl_lock();
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2014-11-12 03:36:48 +01:00
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ieee802154_remove_interfaces(local);
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2012-05-15 22:50:28 +02:00
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2012-05-15 22:50:20 +02:00
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rtnl_unlock();
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2014-10-25 17:16:35 +02:00
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wpan_phy_unregister(local->phy);
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2012-05-15 22:50:20 +02:00
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}
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2014-10-25 17:16:34 +02:00
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EXPORT_SYMBOL(ieee802154_unregister_hw);
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2012-05-15 22:50:20 +02:00
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2014-11-12 03:36:53 +01:00
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static int __init ieee802154_init(void)
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{
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return ieee802154_iface_init();
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}
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static void __exit ieee802154_exit(void)
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{
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ieee802154_iface_exit();
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rcu_barrier();
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}
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subsys_initcall(ieee802154_init);
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module_exit(ieee802154_exit);
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2014-11-12 03:36:52 +01:00
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MODULE_DESCRIPTION("IEEE 802.15.4 subsystem");
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2012-05-15 22:50:20 +02:00
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MODULE_LICENSE("GPL v2");
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