kernel/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 static inline void
  52 rate_control_tx_status_noskb(struct ieee80211_local *local,
  53                              struct ieee80211_supported_band *sband,
  54                              struct sta_info *sta,
  55                              struct ieee80211_tx_info *info)
  56 {
  57         struct rate_control_ref *ref = local->rate_ctrl;
  58         struct ieee80211_sta *ista = &sta->sta;
  59         void *priv_sta = sta->rate_ctrl_priv;
  60
  61         if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  62                 return;
  63
  64         if (WARN_ON_ONCE(!ref->ops->tx_status_noskb))
  65                 return;
  66
  67         ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
  68 }
  69
  70 static inline void rate_control_rate_init(struct sta_info *sta)
  71 {
  72         struct ieee80211_local *local = sta->sdata->local;
  73         struct rate_control_ref *ref = sta->rate_ctrl;
  74         struct ieee80211_sta *ista = &sta->sta;
  75         void *priv_sta = sta->rate_ctrl_priv;
  76         struct ieee80211_supported_band *sband;
  77         struct ieee80211_chanctx_conf *chanctx_conf;
  78
  79         ieee80211_sta_set_rx_nss(sta);
  80
  81         if (!ref)
  82                 return;
  83
  84         rcu_read_lock();
  85
  86         chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
  87         if (WARN_ON(!chanctx_conf)) {
  88                 rcu_read_unlock();
  89                 return;
  90         }
  91
  92         sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
  93
  94         ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista,
  95                             priv_sta);
  96         rcu_read_unlock();
  97         set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
  98 }
  99
 100 static inline void rate_control_rate_update(struct ieee80211_local *local,
 101                                     struct ieee80211_supported_band *sband,
 102                                     struct sta_info *sta, u32 changed)
 103 {
 104         struct rate_control_ref *ref = local->rate_ctrl;
 105         struct ieee80211_sta *ista = &sta->sta;
 106         void *priv_sta = sta->rate_ctrl_priv;
 107         struct ieee80211_chanctx_conf *chanctx_conf;
 108
 109         if (ref && ref->ops->rate_update) {
 110                 rcu_read_lock();
 111
 112                 chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
 113                 if (WARN_ON(!chanctx_conf)) {
 114                         rcu_read_unlock();
 115                         return;
 116                 }
 117
 118                 ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def,
 119                                       ista, priv_sta, changed);
 120                 rcu_read_unlock();
 121         }
 122         drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
 123 }
 124
 125 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
 126                                            struct ieee80211_sta *sta,
 127                                            gfp_t gfp)
 128 {
 129         return ref->ops->alloc_sta(ref->priv, sta, gfp);
 130 }
 131
 132 static inline void rate_control_free_sta(struct sta_info *sta)
 133 {
 134         struct rate_control_ref *ref = sta->rate_ctrl;
 135         struct ieee80211_sta *ista = &sta->sta;
 136         void *priv_sta = sta->rate_ctrl_priv;
 137
 138         ref->ops->free_sta(ref->priv, ista, priv_sta);
 139 }
 140
 141 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
 142 {
 143 #ifdef CONFIG_MAC80211_DEBUGFS
 144         struct rate_control_ref *ref = sta->rate_ctrl;
 145         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
 146                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 147                                           sta->debugfs.dir);
 148 #endif
 149 }
 150
 151 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 152 {
 153 #ifdef CONFIG_MAC80211_DEBUGFS
 154         struct rate_control_ref *ref = sta->rate_ctrl;
 155         if (ref && ref->ops->remove_sta_debugfs)
 156                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 157 #endif
 158 }
 159
 160 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
 161  * first available algorithm. */
 162 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 163                                  const char *name);
 164 void rate_control_deinitialize(struct ieee80211_local *local);
 165
 166
 167 /* Rate control algorithms */
 168 #ifdef CONFIG_MAC80211_RC_MINSTREL
 169 int rc80211_minstrel_init(void);
 170 void rc80211_minstrel_exit(void);
 171 #else
 172 static inline int rc80211_minstrel_init(void)
 173 {
 174         return 0;
 175 }
 176 static inline void rc80211_minstrel_exit(void)
 177 {
 178 }
 179 #endif
 180
 181 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 182 int rc80211_minstrel_ht_init(void);
 183 void rc80211_minstrel_ht_exit(void);
 184 #else
 185 static inline int rc80211_minstrel_ht_init(void)
 186 {
 187         return 0;
 188 }
 189 static inline void rc80211_minstrel_ht_exit(void)
 190 {
 191 }
 192 #endif
 193
 194
 195 #endif /* IEEE80211_RATE_H */