142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
/*
|
|
* Copyright 2007-2012 Siemens AG
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* Written by:
|
|
* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
|
|
* Sergey Lapin <slapin@ossfans.org>
|
|
* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
|
|
* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
|
|
*/
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/crc-ccitt.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#include <net/rtnetlink.h>
|
|
#include <net/ieee802154_netdev.h>
|
|
#include <net/mac802154.h>
|
|
#include <net/cfg802154.h>
|
|
|
|
#include "ieee802154_i.h"
|
|
#include "driver-ops.h"
|
|
|
|
void ieee802154_xmit_worker(struct work_struct *work)
|
|
{
|
|
struct ieee802154_local *local =
|
|
container_of(work, struct ieee802154_local, tx_work);
|
|
struct sk_buff *skb = local->tx_skb;
|
|
struct net_device *dev = skb->dev;
|
|
int res;
|
|
|
|
res = drv_xmit_sync(local, skb);
|
|
if (res)
|
|
goto err_tx;
|
|
|
|
dev->stats.tx_packets++;
|
|
dev->stats.tx_bytes += skb->len;
|
|
|
|
ieee802154_xmit_complete(&local->hw, skb, false);
|
|
|
|
return;
|
|
|
|
err_tx:
|
|
/* Restart the netif queue on each sub_if_data object. */
|
|
ieee802154_wake_queue(&local->hw);
|
|
kfree_skb(skb);
|
|
netdev_dbg(dev, "transmission failed\n");
|
|
}
|
|
|
|
static netdev_tx_t
|
|
ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
|
|
{
|
|
struct net_device *dev = skb->dev;
|
|
int ret;
|
|
|
|
if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) {
|
|
struct sk_buff *nskb;
|
|
u16 crc;
|
|
|
|
if (unlikely(skb_tailroom(skb) < IEEE802154_FCS_LEN)) {
|
|
nskb = skb_copy_expand(skb, 0, IEEE802154_FCS_LEN,
|
|
GFP_ATOMIC);
|
|
if (likely(nskb)) {
|
|
consume_skb(skb);
|
|
skb = nskb;
|
|
} else {
|
|
goto err_tx;
|
|
}
|
|
}
|
|
|
|
crc = crc_ccitt(0, skb->data, skb->len);
|
|
put_unaligned_le16(crc, skb_put(skb, 2));
|
|
}
|
|
|
|
/* Stop the netif queue on each sub_if_data object. */
|
|
ieee802154_stop_queue(&local->hw);
|
|
|
|
/* async is priority, otherwise sync is fallback */
|
|
if (local->ops->xmit_async) {
|
|
unsigned int len = skb->len;
|
|
|
|
ret = drv_xmit_async(local, skb);
|
|
if (ret) {
|
|
ieee802154_wake_queue(&local->hw);
|
|
goto err_tx;
|
|
}
|
|
|
|
dev->stats.tx_packets++;
|
|
dev->stats.tx_bytes += len;
|
|
} else {
|
|
local->tx_skb = skb;
|
|
queue_work(local->workqueue, &local->tx_work);
|
|
}
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
err_tx:
|
|
kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
netdev_tx_t
|
|
ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
|
|
|
|
skb->skb_iif = dev->ifindex;
|
|
|
|
return ieee802154_tx(sdata->local, skb);
|
|
}
|
|
|
|
netdev_tx_t
|
|
ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
|
|
int rc;
|
|
|
|
/* TODO we should move it to wpan_dev_hard_header and dev_hard_header
|
|
* functions. The reason is wireshark will show a mac header which is
|
|
* with security fields but the payload is not encrypted.
|
|
*/
|
|
rc = mac802154_llsec_encrypt(&sdata->sec, skb);
|
|
if (rc) {
|
|
netdev_warn(dev, "encryption failed: %i\n", rc);
|
|
kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
skb->skb_iif = dev->ifindex;
|
|
|
|
return ieee802154_tx(sdata->local, skb);
|
|
}
|