dc67c6b30f
This patch removes the channel hopping feature before xmit. There are several issues to provide a real channel hopping (timing requirements, etc...). We don't have any known kernelspace protocol which really use this feature. And I don't know an real user of this feature. We simply drop this feature now. This patch removes also the hold of pib lock which isn't needed by any real driver xmit callback implementation. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
134 lines
3.4 KiB
C
134 lines
3.4 KiB
C
/*
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* Copyright 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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* Written by:
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Sergey Lapin <slapin@ossfans.org>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/crc-ccitt.h>
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#include <net/ieee802154_netdev.h>
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#include <net/mac802154.h>
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#include <net/cfg802154.h>
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#include "ieee802154_i.h"
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/* IEEE 802.15.4 transceivers can sleep during the xmit session, so process
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* packets through the workqueue.
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*/
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struct wpan_xmit_cb {
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struct sk_buff *skb;
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struct work_struct work;
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struct ieee802154_local *local;
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};
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static inline struct wpan_xmit_cb *wpan_xmit_cb(const struct sk_buff *skb)
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{
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BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct wpan_xmit_cb));
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return (struct wpan_xmit_cb *)skb->cb;
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}
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static void mac802154_xmit_worker(struct work_struct *work)
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{
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struct wpan_xmit_cb *cb = container_of(work, struct wpan_xmit_cb, work);
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struct ieee802154_local *local = cb->local;
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struct ieee802154_sub_if_data *sdata;
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struct sk_buff *skb = cb->skb;
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int res;
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res = local->ops->xmit(&local->hw, skb);
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if (res)
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pr_debug("transmission failed\n");
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/* Restart the netif queue on each sub_if_data object. */
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rcu_read_lock();
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list_for_each_entry_rcu(sdata, &local->interfaces, list)
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netif_wake_queue(sdata->dev);
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rcu_read_unlock();
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dev_kfree_skb(skb);
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}
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static netdev_tx_t
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mac802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
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{
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struct ieee802154_sub_if_data *sdata;
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struct wpan_xmit_cb *cb = wpan_xmit_cb(skb);
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mac802154_monitors_rx(local, skb);
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if (!(local->hw.flags & IEEE802154_HW_OMIT_CKSUM)) {
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u16 crc = crc_ccitt(0, skb->data, skb->len);
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u8 *data = skb_put(skb, 2);
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data[0] = crc & 0xff;
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data[1] = crc >> 8;
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}
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if (skb_cow_head(skb, local->hw.extra_tx_headroom))
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goto err_tx;
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/* Stop the netif queue on each sub_if_data object. */
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rcu_read_lock();
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list_for_each_entry_rcu(sdata, &local->interfaces, list)
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netif_stop_queue(sdata->dev);
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rcu_read_unlock();
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INIT_WORK(&cb->work, mac802154_xmit_worker);
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cb->skb = skb;
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cb->local = local;
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queue_work(local->workqueue, &cb->work);
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return NETDEV_TX_OK;
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err_tx:
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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netdev_tx_t mac802154_monitor_xmit(struct sk_buff *skb, 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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skb->skb_iif = dev->ifindex;
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dev->stats.tx_packets++;
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dev->stats.tx_bytes += skb->len;
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return mac802154_tx(sdata->local, skb);
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}
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netdev_tx_t mac802154_wpan_xmit(struct sk_buff *skb, 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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int rc;
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rc = mac802154_llsec_encrypt(&sdata->sec, skb);
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if (rc) {
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pr_warn("encryption failed: %i\n", rc);
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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skb->skb_iif = dev->ifindex;
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dev->stats.tx_packets++;
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dev->stats.tx_bytes += skb->len;
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return mac802154_tx(sdata->local, skb);
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}
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