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
  22 struct rate_control_ref {
  23         struct ieee80211_local *local;
  24         const struct rate_control_ops *ops;
  25         void *priv;
  26 };
  27
  28 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
  29                            struct sta_info *sta,
  30                            struct ieee80211_tx_rate_control *txrc);
  31
  32 static 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         if (ref->ops->tx_status)
  46                 ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  47         else
  48                 ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
  49 }
  50
  51
  52 static inline void rate_control_rate_init(struct sta_info *sta)
  53 {
  54         struct ieee80211_local *local = sta->sdata->local;
  55         struct rate_control_ref *ref = sta->rate_ctrl;
  56         struct ieee80211_sta *ista = &sta->sta;
  57         void *priv_sta = sta->rate_ctrl_priv;
  58         struct ieee80211_supported_band *sband;
  59         struct ieee80211_chanctx_conf *chanctx_conf;
  60
  61         ieee80211_sta_set_rx_nss(sta);
  62
  63         if (!ref)
  64                 return;
  65
  66         rcu_read_lock();
  67
  68         chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
  69         if (WARN_ON(!chanctx_conf)) {
  70                 rcu_read_unlock();
  71                 return;
  72         }
  73
  74         sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
  75
  76         ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista,
  77                             priv_sta);
  78         rcu_read_unlock();
  79         set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
  80 }
  81
  82 static inline void rate_control_rate_update(struct ieee80211_local *local,
  83                                     struct ieee80211_supported_band *sband,
  84                                     struct sta_info *sta, u32 changed)
  85 {
  86         struct rate_control_ref *ref = local->rate_ctrl;
  87         struct ieee80211_sta *ista = &sta->sta;
  88         void *priv_sta = sta->rate_ctrl_priv;
  89         struct ieee80211_chanctx_conf *chanctx_conf;
  90
  91         if (ref && ref->ops->rate_update) {
  92                 rcu_read_lock();
  93
  94                 chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
  95                 if (WARN_ON(!chanctx_conf)) {
  96                         rcu_read_unlock();
  97                         return;
  98                 }
  99
 100                 ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def,
 101                                       ista, priv_sta, changed);
 102                 rcu_read_unlock();
 103         }
 104         drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
 105 }
 106
 107 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
 108                                            struct ieee80211_sta *sta,
 109                                            gfp_t gfp)
 110 {
 111         return ref->ops->alloc_sta(ref->priv, sta, gfp);
 112 }
 113
 114 static inline void rate_control_free_sta(struct sta_info *sta)
 115 {
 116         struct rate_control_ref *ref = sta->rate_ctrl;
 117         struct ieee80211_sta *ista = &sta->sta;
 118         void *priv_sta = sta->rate_ctrl_priv;
 119
 120         ref->ops->free_sta(ref->priv, ista, priv_sta);
 121 }
 122
 123 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
 124 {
 125 #ifdef CONFIG_MAC80211_DEBUGFS
 126         struct rate_control_ref *ref = sta->rate_ctrl;
 127         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
 128                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 129                                           sta->debugfs.dir);
 130 #endif
 131 }
 132
 133 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 134 {
 135 #ifdef CONFIG_MAC80211_DEBUGFS
 136         struct rate_control_ref *ref = sta->rate_ctrl;
 137         if (ref && ref->ops->remove_sta_debugfs)
 138                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 139 #endif
 140 }
 141
 142 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
 143  * first available algorithm. */
 144 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 145                                  const char *name);
 146 void rate_control_deinitialize(struct ieee80211_local *local);
 147
 148
 149 /* Rate control algorithms */
 150 #ifdef CONFIG_MAC80211_RC_MINSTREL
 151 int rc80211_minstrel_init(void);
 152 void rc80211_minstrel_exit(void);
 153 #else
 154 static inline int rc80211_minstrel_init(void)
 155 {
 156         return 0;
 157 }
 158 static inline void rc80211_minstrel_exit(void)
 159 {
 160 }
 161 #endif
 162
 163 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 164 int rc80211_minstrel_ht_init(void);
 165 void rc80211_minstrel_ht_exit(void);
 166 #else
 167 static inline int rc80211_minstrel_ht_init(void)
 168 {
 169         return 0;
 170 }
 171 static inline void rc80211_minstrel_ht_exit(void)
 172 {
 173 }
 174 #endif
 175
 176
 177 #endif /* IEEE80211_RATE_H */