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>
23 #include <asm/unaligned.h>
25 #include <net/rtnetlink.h>
26 #include <net/ieee802154_netdev.h>
27 #include <net/mac802154.h>
28 #include <net/cfg802154.h>
30 #include "ieee802154_i.h"
31 #include "driver-ops.h"
33 void ieee802154_xmit_worker(struct work_struct *work)
35 struct ieee802154_local *local =
36 container_of(work, struct ieee802154_local, tx_work);
37 struct sk_buff *skb = local->tx_skb;
38 struct net_device *dev = skb->dev;
43 /* check if ifdown occurred while schedule */
44 if (!netif_running(dev))
47 res = drv_xmit_sync(local, skb);
51 ieee802154_xmit_complete(&local->hw, skb, false);
53 dev->stats.tx_packets++;
54 dev->stats.tx_bytes += skb->len;
61 /* Restart the netif queue on each sub_if_data object. */
62 ieee802154_wake_queue(&local->hw);
65 netdev_dbg(dev, "transmission failed\n");
69 ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
71 struct net_device *dev = skb->dev;
74 if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) {
78 if (unlikely(skb_tailroom(skb) < IEEE802154_FCS_LEN)) {
79 nskb = skb_copy_expand(skb, 0, IEEE802154_FCS_LEN,
89 crc = crc_ccitt(0, skb->data, skb->len);
90 put_unaligned_le16(crc, skb_put(skb, 2));
93 /* Stop the netif queue on each sub_if_data object. */
94 ieee802154_stop_queue(&local->hw);
96 /* async is priority, otherwise sync is fallback */
97 if (local->ops->xmit_async) {
98 ret = drv_xmit_async(local, skb);
100 ieee802154_wake_queue(&local->hw);
104 dev->stats.tx_packets++;
105 dev->stats.tx_bytes += skb->len;
108 queue_work(local->workqueue, &local->tx_work);
119 ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev)
121 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
123 skb->skb_iif = dev->ifindex;
125 return ieee802154_tx(sdata->local, skb);
129 ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev)
131 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
134 /* TODO we should move it to wpan_dev_hard_header and dev_hard_header
135 * functions. The reason is wireshark will show a mac header which is
136 * with security fields but the payload is not encrypted.
138 rc = mac802154_llsec_encrypt(&sdata->sec, skb);
140 netdev_warn(dev, "encryption failed: %i\n", rc);
145 skb->skb_iif = dev->ifindex;
147 return ieee802154_tx(sdata->local, skb);