2 * Copyright 2007-2012 Siemens AG
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
15 * Sergey Lapin <slapin@ossfans.org>
16 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
17 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
20 #include <linux/netdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/crc-ccitt.h>
24 #include <net/ieee802154_netdev.h>
25 #include <net/mac802154.h>
26 #include <net/cfg802154.h>
28 #include "ieee802154_i.h"
30 /* IEEE 802.15.4 transceivers can sleep during the xmit session, so process
31 * packets through the workqueue.
35 struct work_struct work;
36 struct ieee802154_local *local;
39 static inline struct wpan_xmit_cb *wpan_xmit_cb(const struct sk_buff *skb)
41 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct wpan_xmit_cb));
43 return (struct wpan_xmit_cb *)skb->cb;
46 static void mac802154_xmit_worker(struct work_struct *work)
48 struct wpan_xmit_cb *cb = container_of(work, struct wpan_xmit_cb, work);
49 struct ieee802154_local *local = cb->local;
50 struct ieee802154_sub_if_data *sdata;
51 struct sk_buff *skb = cb->skb;
54 res = local->ops->xmit(&local->hw, skb);
56 pr_debug("transmission failed\n");
58 /* Restart the netif queue on each sub_if_data object. */
60 list_for_each_entry_rcu(sdata, &local->interfaces, list)
61 netif_wake_queue(sdata->dev);
68 mac802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
70 struct ieee802154_sub_if_data *sdata;
71 struct wpan_xmit_cb *cb = wpan_xmit_cb(skb);
73 mac802154_monitors_rx(local, skb);
75 if (!(local->hw.flags & IEEE802154_HW_OMIT_CKSUM)) {
76 u16 crc = crc_ccitt(0, skb->data, skb->len);
77 u8 *data = skb_put(skb, 2);
83 if (skb_cow_head(skb, local->hw.extra_tx_headroom))
86 /* Stop the netif queue on each sub_if_data object. */
88 list_for_each_entry_rcu(sdata, &local->interfaces, list)
89 netif_stop_queue(sdata->dev);
92 INIT_WORK(&cb->work, mac802154_xmit_worker);
96 queue_work(local->workqueue, &cb->work);
105 netdev_tx_t mac802154_monitor_xmit(struct sk_buff *skb, struct net_device *dev)
107 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
109 skb->skb_iif = dev->ifindex;
110 dev->stats.tx_packets++;
111 dev->stats.tx_bytes += skb->len;
113 return mac802154_tx(sdata->local, skb);
116 netdev_tx_t mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev)
118 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
121 rc = mac802154_llsec_encrypt(&sdata->sec, skb);
123 pr_warn("encryption failed: %i\n", rc);
128 skb->skb_iif = dev->ifindex;
129 dev->stats.tx_packets++;
130 dev->stats.tx_bytes += skb->len;
132 return mac802154_tx(sdata->local, skb);