LXR linux/net/mac80211/rate.h

   1/*
   2 * Copyright 2002-2005, Instant802 Networks, Inc.
   3 * Copyright 2005, Devicescape Software, Inc.
   4 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#ifndef IEEE80211_RATE_H
  12#define IEEE80211_RATE_H
  13
  14#include <linux/netdevice.h>
  15#include <linux/skbuff.h>
  16#include <linux/types.h>
  17#include <net/mac80211.h>
  18#include "ieee80211_i.h"
  19#include "sta_info.h"
  20#include "driver-ops.h"
  21
  22struct rate_control_ref {
  23        struct ieee80211_local *local;
  24        const struct rate_control_ops *ops;
  25        void *priv;
  26};
  27
  28void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
  29                           struct sta_info *sta,
  30                           struct ieee80211_tx_rate_control *txrc);
  31
  32static inline void rate_control_tx_status(struct ieee80211_local *local,
  33                                          struct ieee80211_supported_band *sband,
  34                                          struct sta_info *sta,
  35                                          struct sk_buff *skb)
  36{
  37        struct rate_control_ref *ref = local->rate_ctrl;
  38        struct ieee80211_sta *ista = &sta->sta;
  39        void *priv_sta = sta->rate_ctrl_priv;
  40        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  41
  42        if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  43                return;
  44
  45        spin_lock_bh(&sta->rate_ctrl_lock);
  46        if (ref->ops->tx_status)
  47                ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  48        else
  49                ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
  50        spin_unlock_bh(&sta->rate_ctrl_lock);
  51}
  52
  53static inline void
  54rate_control_tx_status_noskb(struct ieee80211_local *local,
  55                             struct ieee80211_supported_band *sband,
  56                             struct sta_info *sta,
  57                             struct ieee80211_tx_info *info)
  58{
  59        struct rate_control_ref *ref = local->rate_ctrl;
  60        struct ieee80211_sta *ista = &sta->sta;
  61        void *priv_sta = sta->rate_ctrl_priv;
  62
  63        if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  64                return;
  65
  66        if (WARN_ON_ONCE(!ref->ops->tx_status_noskb))
  67                return;
  68
  69        spin_lock_bh(&sta->rate_ctrl_lock);
  70        ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
  71        spin_unlock_bh(&sta->rate_ctrl_lock);
  72}
  73
  74void rate_control_rate_init(struct sta_info *sta);
  75void rate_control_rate_update(struct ieee80211_local *local,
  76                                    struct ieee80211_supported_band *sband,
  77                                    struct sta_info *sta, u32 changed);
  78
  79static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  80                                           struct sta_info *sta, gfp_t gfp)
  81{
  82        spin_lock_init(&sta->rate_ctrl_lock);
  83        return ref->ops->alloc_sta(ref->priv, &sta->sta, gfp);
  84}
  85
  86static inline void rate_control_free_sta(struct sta_info *sta)
  87{
  88        struct rate_control_ref *ref = sta->rate_ctrl;
  89        struct ieee80211_sta *ista = &sta->sta;
  90        void *priv_sta = sta->rate_ctrl_priv;
  91
  92        ref->ops->free_sta(ref->priv, ista, priv_sta);
  93}
  94
  95static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
  96{
  97#ifdef CONFIG_MAC80211_DEBUGFS
  98        struct rate_control_ref *ref = sta->rate_ctrl;
  99        if (ref && sta->debugfs_dir && ref->ops->add_sta_debugfs)
 100                ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 101                                          sta->debugfs_dir);
 102#endif
 103}
 104
 105static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 106{
 107#ifdef CONFIG_MAC80211_DEBUGFS
 108        struct rate_control_ref *ref = sta->rate_ctrl;
 109        if (ref && ref->ops->remove_sta_debugfs)
 110                ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 111#endif
 112}
 113
 114/* Get a reference to the rate control algorithm. If `name' is NULL, get the
 115 * first available algorithm. */
 116int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 117                                 const char *name);
 118void rate_control_deinitialize(struct ieee80211_local *local);
 119
 120
 121/* Rate control algorithms */
 122#ifdef CONFIG_MAC80211_RC_MINSTREL
 123int rc80211_minstrel_init(void);
 124void rc80211_minstrel_exit(void);
 125#else
 126static inline int rc80211_minstrel_init(void)
 127{
 128        return 0;
 129}
 130static inline void rc80211_minstrel_exit(void)
 131{
 132}
 133#endif
 134
 135#ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 136int rc80211_minstrel_ht_init(void);
 137void rc80211_minstrel_ht_exit(void);
 138#else
 139static inline int rc80211_minstrel_ht_init(void)
 140{
 141        return 0;
 142}
 143static inline void rc80211_minstrel_ht_exit(void)
 144{
 145}
 146#endif
 147
 148
 149#endif /* IEEE80211_RATE_H */
 150