mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-29 23:46:41 +07:00
6001d5223d
This patch holds rtnl lock while sync xmit inside of workqueue. Otherwise we could down the interface while worker xmit handling. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
151 lines
3.6 KiB
C
151 lines
3.6 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 <net/rtnetlink.h>
|
|
#include <net/ieee802154_netdev.h>
|
|
#include <net/mac802154.h>
|
|
#include <net/cfg802154.h>
|
|
|
|
#include "ieee802154_i.h"
|
|
|
|
/* IEEE 802.15.4 transceivers can sleep during the xmit session, so process
|
|
* packets through the workqueue.
|
|
*/
|
|
struct wpan_xmit_cb {
|
|
struct sk_buff *skb;
|
|
struct work_struct work;
|
|
struct ieee802154_local *local;
|
|
};
|
|
|
|
static inline struct wpan_xmit_cb *wpan_xmit_cb(const struct sk_buff *skb)
|
|
{
|
|
BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct wpan_xmit_cb));
|
|
|
|
return (struct wpan_xmit_cb *)skb->cb;
|
|
}
|
|
|
|
static void mac802154_xmit_worker(struct work_struct *work)
|
|
{
|
|
struct wpan_xmit_cb *cb = container_of(work, struct wpan_xmit_cb, work);
|
|
struct ieee802154_local *local = cb->local;
|
|
struct sk_buff *skb = cb->skb;
|
|
int res;
|
|
|
|
rtnl_lock();
|
|
|
|
/* check if ifdown occurred while schedule */
|
|
if (!netif_running(skb->dev))
|
|
goto err_tx;
|
|
|
|
res = local->ops->xmit_sync(&local->hw, skb);
|
|
if (res)
|
|
goto err_tx;
|
|
|
|
ieee802154_xmit_complete(&local->hw, skb);
|
|
|
|
rtnl_unlock();
|
|
|
|
return;
|
|
|
|
err_tx:
|
|
/* Restart the netif queue on each sub_if_data object. */
|
|
ieee802154_wake_queue(&local->hw);
|
|
rtnl_unlock();
|
|
kfree_skb(skb);
|
|
pr_debug("transmission failed\n");
|
|
}
|
|
|
|
static netdev_tx_t
|
|
mac802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
|
|
{
|
|
struct wpan_xmit_cb *cb = wpan_xmit_cb(skb);
|
|
int ret;
|
|
|
|
mac802154_monitors_rx(local, skb);
|
|
|
|
if (!(local->hw.flags & IEEE802154_HW_OMIT_CKSUM)) {
|
|
u16 crc = crc_ccitt(0, skb->data, skb->len);
|
|
u8 *data = skb_put(skb, 2);
|
|
|
|
data[0] = crc & 0xff;
|
|
data[1] = crc >> 8;
|
|
}
|
|
|
|
if (skb_cow_head(skb, local->hw.extra_tx_headroom))
|
|
goto err_tx;
|
|
|
|
/* 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) {
|
|
ret = local->ops->xmit_async(&local->hw, skb);
|
|
if (ret) {
|
|
ieee802154_wake_queue(&local->hw);
|
|
goto err_tx;
|
|
}
|
|
} else {
|
|
INIT_WORK(&cb->work, mac802154_xmit_worker);
|
|
cb->skb = skb;
|
|
cb->local = local;
|
|
|
|
queue_work(local->workqueue, &cb->work);
|
|
}
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
err_tx:
|
|
kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
netdev_tx_t mac802154_monitor_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;
|
|
dev->stats.tx_packets++;
|
|
dev->stats.tx_bytes += skb->len;
|
|
|
|
return mac802154_tx(sdata->local, skb);
|
|
}
|
|
|
|
netdev_tx_t mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
|
|
int rc;
|
|
|
|
rc = mac802154_llsec_encrypt(&sdata->sec, skb);
|
|
if (rc) {
|
|
pr_warn("encryption failed: %i\n", rc);
|
|
kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
skb->skb_iif = dev->ifindex;
|
|
dev->stats.tx_packets++;
|
|
dev->stats.tx_bytes += skb->len;
|
|
|
|
return mac802154_tx(sdata->local, skb);
|
|
}
|