rate.h 4.0 KB
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/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005, Devicescape Software, Inc.
 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
 *
 * 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.
 */

#ifndef IEEE80211_RATE_H
#define IEEE80211_RATE_H

#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/types.h>
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#include <linux/kref.h>
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#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "sta_info.h"

struct rate_control_ref {
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	struct ieee80211_local *local;
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	struct rate_control_ops *ops;
	void *priv;
	struct kref kref;
};

/* Get a reference to the rate control algorithm. If `name' is NULL, get the
 * first available algorithm. */
struct rate_control_ref *rate_control_alloc(const char *name,
					    struct ieee80211_local *local);
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void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
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			   struct sta_info *sta,
			   struct ieee80211_tx_rate_control *txrc);
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struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
void rate_control_put(struct rate_control_ref *ref);

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static inline void rate_control_tx_status(struct ieee80211_local *local,
					  struct ieee80211_supported_band *sband,
					  struct sta_info *sta,
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					  struct sk_buff *skb)
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{
	struct rate_control_ref *ref = local->rate_ctrl;
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	struct ieee80211_sta *ista = &sta->sta;
	void *priv_sta = sta->rate_ctrl_priv;
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	ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
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}


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static inline void rate_control_rate_init(struct sta_info *sta)
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{
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	struct ieee80211_local *local = sta->sdata->local;
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	struct rate_control_ref *ref = sta->rate_ctrl;
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	struct ieee80211_sta *ista = &sta->sta;
	void *priv_sta = sta->rate_ctrl_priv;
	struct ieee80211_supported_band *sband;

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	if (!ref)
		return;

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	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];

	ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
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}

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static inline void rate_control_rate_update(struct ieee80211_local *local,
				    struct ieee80211_supported_band *sband,
				    struct sta_info *sta, u32 changed)
{
	struct rate_control_ref *ref = local->rate_ctrl;
	struct ieee80211_sta *ista = &sta->sta;
	void *priv_sta = sta->rate_ctrl_priv;

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	if (ref && ref->ops->rate_update)
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		ref->ops->rate_update(ref->priv, sband, ista,
				      priv_sta, changed);
}
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static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
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					   struct ieee80211_sta *sta,
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					   gfp_t gfp)
{
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	return ref->ops->alloc_sta(ref->priv, sta, gfp);
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}

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static inline void rate_control_free_sta(struct sta_info *sta)
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{
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	struct rate_control_ref *ref = sta->rate_ctrl;
	struct ieee80211_sta *ista = &sta->sta;
	void *priv_sta = sta->rate_ctrl_priv;

	ref->ops->free_sta(ref->priv, ista, priv_sta);
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}

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static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
{
#ifdef CONFIG_MAC80211_DEBUGFS
	struct rate_control_ref *ref = sta->rate_ctrl;
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	if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
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		ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
					  sta->debugfs.dir);
#endif
}

static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
{
#ifdef CONFIG_MAC80211_DEBUGFS
	struct rate_control_ref *ref = sta->rate_ctrl;
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	if (ref && ref->ops->remove_sta_debugfs)
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		ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
#endif
}

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/* functions for rate control related to a device */
int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
				 const char *name);
void rate_control_deinitialize(struct ieee80211_local *local);

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/* Rate control algorithms */
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#ifdef CONFIG_MAC80211_RC_PID
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extern int rc80211_pid_init(void);
extern void rc80211_pid_exit(void);
#else
static inline int rc80211_pid_init(void)
{
	return 0;
}
static inline void rc80211_pid_exit(void)
{
}
#endif

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#ifdef CONFIG_MAC80211_RC_MINSTREL
extern int rc80211_minstrel_init(void);
extern void rc80211_minstrel_exit(void);
#else
static inline int rc80211_minstrel_init(void)
{
	return 0;
}
static inline void rc80211_minstrel_exit(void)
{
}
#endif


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#endif /* IEEE80211_RATE_H */