net/mac80211/rate.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright (c) 2006 Jiri Benc <[email protected]>
   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         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
  41         if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  42                 return;
  43
  44         ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  45 }
  46
  47
  48 static inline void rate_control_rate_init(struct sta_info *sta)
  49 {
  50         struct ieee80211_local *local = sta->sdata->local;
  51         struct rate_control_ref *ref = sta->rate_ctrl;
  52         struct ieee80211_sta *ista = &sta->sta;
  53         void *priv_sta = sta->rate_ctrl_priv;
  54         struct ieee80211_supported_band *sband;
  55         struct ieee80211_chanctx_conf *chanctx_conf;
  56
  57         if (!ref)
  58                 return;
  59
  60         rcu_read_lock();
  61
  62         chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
  63         if (WARN_ON(!chanctx_conf)) {
  64                 rcu_read_unlock();
  65                 return;
  66         }
  67
  68         sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
  69         rcu_read_unlock();
  70
  71         ieee80211_sta_set_rx_nss(sta);
  72
  73         ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
  74         set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
  75 }
  76
  77 static inline void rate_control_rate_update(struct ieee80211_local *local,
  78                                     struct ieee80211_supported_band *sband,
  79                                     struct sta_info *sta, u32 changed)
  80 {
  81         struct rate_control_ref *ref = local->rate_ctrl;
  82         struct ieee80211_sta *ista = &sta->sta;
  83         void *priv_sta = sta->rate_ctrl_priv;
  84
  85         if (ref && ref->ops->rate_update)
  86                 ref->ops->rate_update(ref->priv, sband, ista,
  87                                       priv_sta, changed);
  88         drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
  89 }
  90
  91 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  92                                            struct ieee80211_sta *sta,
  93                                            gfp_t gfp)
  94 {
  95         return ref->ops->alloc_sta(ref->priv, sta, gfp);
  96 }
  97
  98 static inline void rate_control_free_sta(struct sta_info *sta)
  99 {
 100         struct rate_control_ref *ref = sta->rate_ctrl;
 101         struct ieee80211_sta *ista = &sta->sta;
 102         void *priv_sta = sta->rate_ctrl_priv;
 103
 104         ref->ops->free_sta(ref->priv, ista, priv_sta);
 105 }
 106
 107 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
 108 {
 109 #ifdef CONFIG_MAC80211_DEBUGFS
 110         struct rate_control_ref *ref = sta->rate_ctrl;
 111         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
 112                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 113                                           sta->debugfs.dir);
 114 #endif
 115 }
 116
 117 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 118 {
 119 #ifdef CONFIG_MAC80211_DEBUGFS
 120         struct rate_control_ref *ref = sta->rate_ctrl;
 121         if (ref && ref->ops->remove_sta_debugfs)
 122                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 123 #endif
 124 }
 125
 126 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
 127  * first available algorithm. */
 128 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 129                                  const char *name);
 130 void rate_control_deinitialize(struct ieee80211_local *local);
 131
 132
 133 /* Rate control algorithms */
 134 #ifdef CONFIG_MAC80211_RC_PID
 135 extern int rc80211_pid_init(void);
 136 extern void rc80211_pid_exit(void);
 137 #else
 138 static inline int rc80211_pid_init(void)
 139 {
 140         return 0;
 141 }
 142 static inline void rc80211_pid_exit(void)
 143 {
 144 }
 145 #endif
 146
 147 #ifdef CONFIG_MAC80211_RC_MINSTREL
 148 extern int rc80211_minstrel_init(void);
 149 extern void rc80211_minstrel_exit(void);
 150 #else
 151 static inline int rc80211_minstrel_init(void)
 152 {
 153         return 0;
 154 }
 155 static inline void rc80211_minstrel_exit(void)
 156 {
 157 }
 158 #endif
 159
 160 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 161 extern int rc80211_minstrel_ht_init(void);
 162 extern void rc80211_minstrel_ht_exit(void);
 163 #else
 164 static inline int rc80211_minstrel_ht_init(void)
 165 {
 166         return 0;
 167 }
 168 static inline void rc80211_minstrel_ht_exit(void)
 169 {
 170 }
 171 #endif
 172
 173
 174 #endif /* IEEE80211_RATE_H */