rate.h

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/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005, Devicescape Software, Inc.
 * Copyright (c) 2006 Jiri Benc <[email protected]>
 *
 * 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>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "sta_info.h"
#include "driver-ops.h"

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

void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
               struct sta_info *sta,
               struct ieee80211_tx_rate_control *txrc);

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

    if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
        return;

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


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

    if (!ref)
        return;

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

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

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;

    if (ref && ref->ops->rate_update)
        ref->ops->rate_update(ref->priv, sband, ista,
                      priv_sta, changed);
    drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
}

static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
                       struct ieee80211_sta *sta,
                       gfp_t gfp)
{
    return ref->ops->alloc_sta(ref->priv, sta, gfp);
}

static inline void rate_control_free_sta(struct sta_info *sta)
{
    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);
}

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

/* Get a reference to the rate control algorithm. If `name' is NULL, get the
 * first available algorithm. */
int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
                 const char *name);
void rate_control_deinitialize(struct ieee80211_local *local);


/* Rate control algorithms */
#ifdef CONFIG_MAC80211_RC_PID
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

#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

#ifdef CONFIG_MAC80211_RC_MINSTREL_HT
extern int rc80211_minstrel_ht_init(void);
extern void rc80211_minstrel_ht_exit(void);
#else
static inline int rc80211_minstrel_ht_init(void)
{
    return 0;
}
static inline void rc80211_minstrel_ht_exit(void)
{
}
#endif


#endif /* IEEE80211_RATE_H */