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/rtnetlink.h>
25 #include <net/ieee802154_netdev.h>
26 #include <net/mac802154.h>
27 #include <net/cfg802154.h>
29 #include "ieee802154_i.h"
31 /* IEEE 802.15.4 transceivers can sleep during the xmit session, so process
32 * packets through the workqueue.
36 struct work_struct work;
37 struct ieee802154_local *local;
40 static inline struct wpan_xmit_cb *wpan_xmit_cb(const struct sk_buff *skb)
42 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct wpan_xmit_cb));
44 return (struct wpan_xmit_cb *)skb->cb;
47 static void mac802154_xmit_worker(struct work_struct *work)
49 struct wpan_xmit_cb *cb = container_of(work, struct wpan_xmit_cb, work);
50 struct ieee802154_local *local = cb->local;
51 struct sk_buff *skb = cb->skb;
56 /* check if ifdown occurred while schedule */
57 if (!netif_running(skb->dev))
60 res = local->ops->xmit_sync(&local->hw, skb);
64 ieee802154_xmit_complete(&local->hw, skb);
71 /* Restart the netif queue on each sub_if_data object. */
72 ieee802154_wake_queue(&local->hw);
75 netdev_dbg(skb->dev, "transmission failed\n");
79 mac802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
81 struct wpan_xmit_cb *cb = wpan_xmit_cb(skb);
84 mac802154_monitors_rx(local, skb);
86 if (!(local->hw.flags & IEEE802154_HW_OMIT_CKSUM)) {
87 __le16 crc = cpu_to_le16(crc_ccitt(0, skb->data, skb->len));
89 memcpy(skb_put(skb, 2), &crc, 2);
92 if (skb_cow_head(skb, local->hw.extra_tx_headroom))
95 /* Stop the netif queue on each sub_if_data object. */
96 ieee802154_stop_queue(&local->hw);
98 /* async is priority, otherwise sync is fallback */
99 if (local->ops->xmit_async) {
100 ret = local->ops->xmit_async(&local->hw, skb);
102 ieee802154_wake_queue(&local->hw);
106 INIT_WORK(&cb->work, mac802154_xmit_worker);
110 queue_work(local->workqueue, &cb->work);
120 netdev_tx_t mac802154_monitor_xmit(struct sk_buff *skb, struct net_device *dev)
122 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
124 skb->skb_iif = dev->ifindex;
125 dev->stats.tx_packets++;
126 dev->stats.tx_bytes += skb->len;
128 return mac802154_tx(sdata->local, skb);
131 netdev_tx_t mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev)
133 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
136 rc = mac802154_llsec_encrypt(&sdata->sec, skb);
138 netdev_warn(dev, "encryption failed: %i\n", rc);
143 skb->skb_iif = dev->ifindex;
144 dev->stats.tx_packets++;
145 dev->stats.tx_bytes += skb->len;
147 return mac802154_tx(sdata->local, skb);