18d60a0d49
This patch uses the queue utility helpers inside the xmit worker of mac802154 subsystem. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/*
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* Copyright 2007-2012 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by:
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Sergey Lapin <slapin@ossfans.org>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/crc-ccitt.h>
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#include <net/ieee802154_netdev.h>
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#include <net/mac802154.h>
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#include <net/cfg802154.h>
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#include "ieee802154_i.h"
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/* IEEE 802.15.4 transceivers can sleep during the xmit session, so process
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* packets through the workqueue.
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*/
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struct wpan_xmit_cb {
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struct sk_buff *skb;
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struct work_struct work;
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struct ieee802154_local *local;
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};
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static inline struct wpan_xmit_cb *wpan_xmit_cb(const struct sk_buff *skb)
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{
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BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct wpan_xmit_cb));
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return (struct wpan_xmit_cb *)skb->cb;
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}
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static void mac802154_xmit_worker(struct work_struct *work)
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{
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struct wpan_xmit_cb *cb = container_of(work, struct wpan_xmit_cb, work);
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struct ieee802154_local *local = cb->local;
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struct sk_buff *skb = cb->skb;
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int res;
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res = local->ops->xmit(&local->hw, skb);
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if (res)
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pr_debug("transmission failed\n");
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/* Restart the netif queue on each sub_if_data object. */
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ieee802154_xmit_complete(&local->hw, skb);
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}
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static netdev_tx_t
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mac802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
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{
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struct wpan_xmit_cb *cb = wpan_xmit_cb(skb);
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mac802154_monitors_rx(local, skb);
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if (!(local->hw.flags & IEEE802154_HW_OMIT_CKSUM)) {
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u16 crc = crc_ccitt(0, skb->data, skb->len);
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u8 *data = skb_put(skb, 2);
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data[0] = crc & 0xff;
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data[1] = crc >> 8;
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}
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if (skb_cow_head(skb, local->hw.extra_tx_headroom))
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goto err_tx;
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/* Stop the netif queue on each sub_if_data object. */
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ieee802154_stop_queue(&local->hw);
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INIT_WORK(&cb->work, mac802154_xmit_worker);
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cb->skb = skb;
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cb->local = local;
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queue_work(local->workqueue, &cb->work);
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return NETDEV_TX_OK;
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err_tx:
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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netdev_tx_t mac802154_monitor_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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skb->skb_iif = dev->ifindex;
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dev->stats.tx_packets++;
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dev->stats.tx_bytes += skb->len;
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return mac802154_tx(sdata->local, skb);
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}
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netdev_tx_t mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
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int rc;
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rc = mac802154_llsec_encrypt(&sdata->sec, skb);
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if (rc) {
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pr_warn("encryption failed: %i\n", rc);
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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skb->skb_iif = dev->ifindex;
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dev->stats.tx_packets++;
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dev->stats.tx_bytes += skb->len;
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return mac802154_tx(sdata->local, skb);
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}
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