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#ifndef MAC80211_MQ_COMPAT_H
#define MAC80211_MQ_COMPAT_H
#include "wme.h"
/*
* Copyright 2008 Luis R. Rodriguez <lrodriguez@atheros.com>
*
* CONFIG_NETDEVICES_MULTIQUEUE backport support for kernels <= 2.6.22
*
* Older kernels we use the old skb callback queue as they don't support
* CONFIG_NETDEVICES_MULTIQUEUE. CONFIG_NETDEVICES_MULTIQUEUE was
* added in the kernel to help support on the network stack multiple
* hardware TX queues.
*
* This is an internal mac80211 hack as its using internal mac80211 data
* structures to keep track of queue for the skb.
*
* Please realize there is a penalty for using this -- you don't get
* to schedule each hardware queue separately, so consider upgrading
* for better performance on 802.11n. Since this is using what we *used*
* to use this also of course means older kernels that weren't using MQ
* support for 802.11n are also affected. This means <= 2.6.26.
*/
#define IEEE80211_DEV_TO_LOCAL(dev) \
((struct ieee80211_local *)(IEEE80211_DEV_TO_SUB_IF(dev))->local)
/* This was stripped out after MQ patch for mac80211, let bring it
* back to life */
enum ieee80211_link_state_t {
IEEE80211_LINK_STATE_XOFF = 0,
IEEE80211_LINK_STATE_PENDING,
};
/* Note: skb_[get|set]_queue_mapping() was added as of 2.6.24 in
* include/linux/skbuff.h. We port this and add it into
* include/net/mac80211.h through compat.diff as this could
* be used by mac80211 drivers as well. We don't add it to
* compat.h as we don't want things which require on
* mac80211.h in compat.h */
/* These are helpers which used to be in mac80211 prior to
* CONFIG_NETDEVICES_MULTIQUEUE being demanded for CONFIG_MAC80211_QOS
* The way we fix this for older kernels is resort to the old work. */
static inline int __ieee80211_queue_stopped(struct ieee80211_local *local,
int queue)
{
return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
}
static inline int __ieee80211_queue_pending(const struct ieee80211_local *local,
int queue)
{
return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]);
}
/* Internal mac80211 hack, note we remove "const" qualifier to net_device
* to make compiler shutup as <= 2.6.22 doesn't set net_device as const on
* netdev_priv() */
static inline int __netif_subqueue_stopped(struct net_device *dev,
u16 queue_index)
{
return __ieee80211_queue_stopped(IEEE80211_DEV_TO_LOCAL(dev), queue_index);
}
static inline int netif_subqueue_stopped(struct net_device *dev,
struct sk_buff *skb)
{
return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}
/* we port this with the penalty performance that we schedule all queues
* as well, this isn't exactly MQ support :). We port this to let
* our compat.diff be smaller as well.
* XXX: We can probably just run __netif_schedule() here */
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
if (!ieee80211_qdisc_installed(dev)) {
if (queue_index == 0)
netif_wake_queue(dev);
} else
__netif_schedule(dev);
}
/* Backport to use old internal mac80211 queue state. "const" qualifier
* remvoved as netdev_priv() doesn't pass us a const in older kernels. */
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
set_bit(IEEE80211_LINK_STATE_XOFF,
&IEEE80211_DEV_TO_LOCAL(dev)->state[queue_index]);
}
#endif /* MAC80211_MQ_COMPAT_H */
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