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 <linux/kref.h>
  18 #include <net/mac80211.h>
  19 #include "ieee80211_i.h"
  20 #include "sta_info.h"
  21
  22 struct rate_control_ref {
  23         struct ieee80211_local *local;
  24         struct rate_control_ops *ops;
  25         void *priv;
  26         struct kref kref;
  27 };
  28
  29 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
  30                            struct sta_info *sta,
  31                            struct ieee80211_tx_rate_control *txrc);
  32 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
  33 void rate_control_put(struct rate_control_ref *ref);
  34
  35 static inline void rate_control_tx_status(struct ieee80211_local *local,
  36                                           struct ieee80211_supported_band *sband,
  37                                           struct sta_info *sta,
  38                                           struct sk_buff *skb)
  39 {
  40         struct rate_control_ref *ref = local->rate_ctrl;
  41         struct ieee80211_sta *ista = &sta->sta;
  42         void *priv_sta = sta->rate_ctrl_priv;
  43
  44         if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  45                 return;
  46
  47         ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  48 }
  49
  50
  51 static inline void rate_control_rate_init(struct sta_info *sta)
  52 {
  53         struct ieee80211_local *local = sta->sdata->local;
  54         struct rate_control_ref *ref = sta->rate_ctrl;
  55         struct ieee80211_sta *ista = &sta->sta;
  56         void *priv_sta = sta->rate_ctrl_priv;
  57         struct ieee80211_supported_band *sband;
  58
  59         if (!ref)
  60                 return;
  61
  62         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
  63
  64         ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
  65         set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
  66 }
  67
  68 static inline void rate_control_rate_update(struct ieee80211_local *local,
  69                                     struct ieee80211_supported_band *sband,
  70                                     struct sta_info *sta, u32 changed,
  71                                     enum nl80211_channel_type oper_chan_type)
  72 {
  73         struct rate_control_ref *ref = local->rate_ctrl;
  74         struct ieee80211_sta *ista = &sta->sta;
  75         void *priv_sta = sta->rate_ctrl_priv;
  76
  77         if (ref && ref->ops->rate_update)
  78                 ref->ops->rate_update(ref->priv, sband, ista,
  79                                       priv_sta, changed, oper_chan_type);
  80 }
  81
  82 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  83                                            struct ieee80211_sta *sta,
  84                                            gfp_t gfp)
  85 {
  86         return ref->ops->alloc_sta(ref->priv, sta, gfp);
  87 }
  88
  89 static inline void rate_control_free_sta(struct sta_info *sta)
  90 {
  91         struct rate_control_ref *ref = sta->rate_ctrl;
  92         struct ieee80211_sta *ista = &sta->sta;
  93         void *priv_sta = sta->rate_ctrl_priv;
  94
  95         ref->ops->free_sta(ref->priv, ista, priv_sta);
  96 }
  97
  98 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
  99 {
 100 #ifdef CONFIG_MAC80211_DEBUGFS
 101         struct rate_control_ref *ref = sta->rate_ctrl;
 102         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
 103                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 104                                           sta->debugfs.dir);
 105 #endif
 106 }
 107
 108 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 109 {
 110 #ifdef CONFIG_MAC80211_DEBUGFS
 111         struct rate_control_ref *ref = sta->rate_ctrl;
 112         if (ref && ref->ops->remove_sta_debugfs)
 113                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 114 #endif
 115 }
 116
 117 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
 118  * first available algorithm. */
 119 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 120                                  const char *name);
 121 void rate_control_deinitialize(struct ieee80211_local *local);
 122
 123
 124 /* Rate control algorithms */
 125 #ifdef CONFIG_MAC80211_RC_PID
 126 extern int rc80211_pid_init(void);
 127 extern void rc80211_pid_exit(void);
 128 #else
 129 static inline int rc80211_pid_init(void)
 130 {
 131         return 0;
 132 }
 133 static inline void rc80211_pid_exit(void)
 134 {
 135 }
 136 #endif
 137
 138 #ifdef CONFIG_MAC80211_RC_MINSTREL
 139 extern int rc80211_minstrel_init(void);
 140 extern void rc80211_minstrel_exit(void);
 141 #else
 142 static inline int rc80211_minstrel_init(void)
 143 {
 144         return 0;
 145 }
 146 static inline void rc80211_minstrel_exit(void)
 147 {
 148 }
 149 #endif
 150
 151 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 152 extern int rc80211_minstrel_ht_init(void);
 153 extern void rc80211_minstrel_ht_exit(void);
 154 #else
 155 static inline int rc80211_minstrel_ht_init(void)
 156 {
 157         return 0;
 158 }
 159 static inline void rc80211_minstrel_ht_exit(void)
 160 {
 161 }
 162 #endif
 163
 164
 165 #endif /* IEEE80211_RATE_H */