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         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         ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
  72         set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
  73 }
  74
  75 static inline void rate_control_rate_update(struct ieee80211_local *local,
  76                                     struct ieee80211_supported_band *sband,
  77                                     struct sta_info *sta, u32 changed)
  78 {
  79         struct rate_control_ref *ref = local->rate_ctrl;
  80         struct ieee80211_sta *ista = &sta->sta;
  81         void *priv_sta = sta->rate_ctrl_priv;
  82
  83         if (ref && ref->ops->rate_update)
  84                 ref->ops->rate_update(ref->priv, sband, ista,
  85                                       priv_sta, changed);
  86         drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
  87 }
  88
  89 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  90                                            struct ieee80211_sta *sta,
  91                                            gfp_t gfp)
  92 {
  93         return ref->ops->alloc_sta(ref->priv, sta, gfp);
  94 }
  95
  96 static inline void rate_control_free_sta(struct sta_info *sta)
  97 {
  98         struct rate_control_ref *ref = sta->rate_ctrl;
  99         struct ieee80211_sta *ista = &sta->sta;
 100         void *priv_sta = sta->rate_ctrl_priv;
 101
 102         ref->ops->free_sta(ref->priv, ista, priv_sta);
 103 }
 104
 105 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
 106 {
 107 #ifdef CONFIG_MAC80211_DEBUGFS
 108         struct rate_control_ref *ref = sta->rate_ctrl;
 109         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
 110                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 111                                           sta->debugfs.dir);
 112 #endif
 113 }
 114
 115 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 116 {
 117 #ifdef CONFIG_MAC80211_DEBUGFS
 118         struct rate_control_ref *ref = sta->rate_ctrl;
 119         if (ref && ref->ops->remove_sta_debugfs)
 120                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 121 #endif
 122 }
 123
 124 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
 125  * first available algorithm. */
 126 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 127                                  const char *name);
 128 void rate_control_deinitialize(struct ieee80211_local *local);
 129
 130
 131 /* Rate control algorithms */
 132 #ifdef CONFIG_MAC80211_RC_PID
 133 extern int rc80211_pid_init(void);
 134 extern void rc80211_pid_exit(void);
 135 #else
 136 static inline int rc80211_pid_init(void)
 137 {
 138         return 0;
 139 }
 140 static inline void rc80211_pid_exit(void)
 141 {
 142 }
 143 #endif
 144
 145 #ifdef CONFIG_MAC80211_RC_MINSTREL
 146 extern int rc80211_minstrel_init(void);
 147 extern void rc80211_minstrel_exit(void);
 148 #else
 149 static inline int rc80211_minstrel_init(void)
 150 {
 151         return 0;
 152 }
 153 static inline void rc80211_minstrel_exit(void)
 154 {
 155 }
 156 #endif
 157
 158 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 159 extern int rc80211_minstrel_ht_init(void);
 160 extern void rc80211_minstrel_ht_exit(void);
 161 #else
 162 static inline int rc80211_minstrel_ht_init(void)
 163 {
 164         return 0;
 165 }
 166 static inline void rc80211_minstrel_ht_exit(void)
 167 {
 168 }
 169 #endif
 170
 171
 172 #endif /* IEEE80211_RATE_H */