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)) {
75 u16 crc = crc_ccitt(0, skb->data, skb->len);
77 put_unaligned_le16(crc, skb_put(skb, 2));
80 if (skb_cow_head(skb, local->hw.extra_tx_headroom))
83 /* Stop the netif queue on each sub_if_data object. */
84 ieee802154_stop_queue(&local->hw);
86 /* async is priority, otherwise sync is fallback */
87 if (local->ops->xmit_async) {
88 ret = drv_xmit_async(local, skb);
90 ieee802154_wake_queue(&local->hw);
94 dev->stats.tx_packets++;
95 dev->stats.tx_bytes += skb->len;
98 queue_work(local->workqueue, &local->tx_work);
109 ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev)
111 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
113 skb->skb_iif = dev->ifindex;
115 return ieee802154_tx(sdata->local, skb);
119 ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev)
121 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
124 rc = mac802154_llsec_encrypt(&sdata->sec, skb);
126 netdev_warn(dev, "encryption failed: %i\n", rc);
131 skb->skb_iif = dev->ifindex;
133 return ieee802154_tx(sdata->local, skb);