55a2d06517
This patch removes an unnecessary include of driver-ops header file. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
266 lines
6.1 KiB
C
266 lines
6.1 KiB
C
/*
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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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#include <net/netlink.h>
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#include <linux/nl802154.h>
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#include <net/mac802154.h>
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#include <net/ieee802154_netdev.h>
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#include <net/route.h>
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#include <net/cfg802154.h>
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#include "ieee802154_i.h"
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static int
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mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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struct ieee802154_local *local;
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int err;
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local = wpan_phy_priv(phy);
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sdata->dev = dev;
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sdata->local = local;
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dev->needed_headroom = local->hw.extra_tx_headroom;
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SET_NETDEV_DEV(dev, &local->phy->dev);
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err = register_netdev(dev);
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if (err < 0)
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return err;
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rtnl_lock();
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mutex_lock(&local->iflist_mtx);
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list_add_tail_rcu(&sdata->list, &local->interfaces);
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mutex_unlock(&local->iflist_mtx);
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rtnl_unlock();
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return 0;
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}
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static void
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mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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ASSERT_RTNL();
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BUG_ON(sdata->local->phy != phy);
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mutex_lock(&sdata->local->iflist_mtx);
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list_del_rcu(&sdata->list);
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mutex_unlock(&sdata->local->iflist_mtx);
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synchronize_rcu();
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unregister_netdevice(sdata->dev);
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}
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static struct net_device *
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mac802154_add_iface(struct wpan_phy *phy, const char *name, int type)
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{
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struct net_device *dev;
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int err = -ENOMEM;
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switch (type) {
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case IEEE802154_DEV_MONITOR:
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dev = alloc_netdev(sizeof(struct ieee802154_sub_if_data),
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name, NET_NAME_UNKNOWN,
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mac802154_monitor_setup);
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break;
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case IEEE802154_DEV_WPAN:
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dev = alloc_netdev(sizeof(struct ieee802154_sub_if_data),
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name, NET_NAME_UNKNOWN,
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mac802154_wpan_setup);
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break;
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default:
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dev = NULL;
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err = -EINVAL;
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break;
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}
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if (!dev)
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goto err;
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err = mac802154_netdev_register(phy, dev);
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if (err)
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goto err_free;
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dev_hold(dev); /* we return an incremented device refcount */
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return dev;
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err_free:
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free_netdev(dev);
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err:
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return ERR_PTR(err);
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}
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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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struct ieee802154_hw *
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ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
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{
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struct wpan_phy *phy;
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struct ieee802154_local *local;
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size_t priv_size;
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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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pr_err("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 ieee802154_local 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 ieee802154_local |
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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 align them here.
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*/
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priv_size = ALIGN(sizeof(*local), 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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pr_err("failure to allocate master IEEE802.15.4 device\n");
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return NULL;
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}
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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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INIT_LIST_HEAD(&local->interfaces);
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mutex_init(&local->iflist_mtx);
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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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return &local->hw;
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}
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EXPORT_SYMBOL(ieee802154_alloc_hw);
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void ieee802154_free_hw(struct ieee802154_hw *hw)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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BUG_ON(!list_empty(&local->interfaces));
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mutex_destroy(&local->iflist_mtx);
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wpan_phy_free(local->phy);
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}
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EXPORT_SYMBOL(ieee802154_free_hw);
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int ieee802154_register_hw(struct ieee802154_hw *hw)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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int rc = -ENOSYS;
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local->workqueue =
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create_singlethread_workqueue(wpan_phy_name(local->phy));
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if (!local->workqueue) {
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rc = -ENOMEM;
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goto out;
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}
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wpan_phy_set_dev(local->phy, local->hw.parent);
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local->phy->add_iface = mac802154_add_iface;
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local->phy->del_iface = mac802154_del_iface;
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rc = wpan_phy_register(local->phy);
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if (rc < 0)
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goto out_wq;
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return 0;
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out_wq:
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destroy_workqueue(local->workqueue);
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out:
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return rc;
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}
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EXPORT_SYMBOL(ieee802154_register_hw);
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void ieee802154_unregister_hw(struct ieee802154_hw *hw)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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struct ieee802154_sub_if_data *sdata, *next;
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tasklet_kill(&local->tasklet);
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flush_workqueue(local->workqueue);
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destroy_workqueue(local->workqueue);
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rtnl_lock();
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list_for_each_entry_safe(sdata, next, &local->interfaces, list) {
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mutex_lock(&sdata->local->iflist_mtx);
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list_del(&sdata->list);
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mutex_unlock(&sdata->local->iflist_mtx);
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unregister_netdevice(sdata->dev);
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}
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rtnl_unlock();
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wpan_phy_unregister(local->phy);
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}
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EXPORT_SYMBOL(ieee802154_unregister_hw);
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MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
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MODULE_LICENSE("GPL v2");
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