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         spin_lock_bh(&sta->rate_ctrl_lock);
  46         if (ref->ops->tx_status)
  47                 ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  48         else
  49                 ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
  50         spin_unlock_bh(&sta->rate_ctrl_lock);
  51 }
  52
  53 static inline void
  54 rate_control_tx_status_noskb(struct ieee80211_local *local,
  55                              struct ieee80211_supported_band *sband,
  56                              struct sta_info *sta,
  57                              struct ieee80211_tx_info *info)
  58 {
  59         struct rate_control_ref *ref = local->rate_ctrl;
  60         struct ieee80211_sta *ista = &sta->sta;
  61         void *priv_sta = sta->rate_ctrl_priv;
  62
  63         if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  64                 return;
  65
  66         if (WARN_ON_ONCE(!ref->ops->tx_status_noskb))
  67                 return;
  68
  69         spin_lock_bh(&sta->rate_ctrl_lock);
  70         ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
  71         spin_unlock_bh(&sta->rate_ctrl_lock);
  72 }
  73
  74 void rate_control_rate_init(struct sta_info *sta);
  75 void rate_control_rate_update(struct ieee80211_local *local,
  76                                     struct ieee80211_supported_band *sband,
  77                                     struct sta_info *sta, u32 changed);
  78
  79 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  80                                            struct sta_info *sta, gfp_t gfp)
  81 {
  82         spin_lock_init(&sta->rate_ctrl_lock);
  83         return ref->ops->alloc_sta(ref->priv, &sta->sta, gfp);
  84 }
  85
  86 static inline void rate_control_free_sta(struct sta_info *sta)
  87 {
  88         struct rate_control_ref *ref = sta->rate_ctrl;
  89         struct ieee80211_sta *ista = &sta->sta;
  90         void *priv_sta = sta->rate_ctrl_priv;
  91
  92         ref->ops->free_sta(ref->priv, ista, priv_sta);
  93 }
  94
  95 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
  96 {
  97 #ifdef CONFIG_MAC80211_DEBUGFS
  98         struct rate_control_ref *ref = sta->rate_ctrl;
  99         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
 100                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 101                                           sta->debugfs.dir);
 102 #endif
 103 }
 104
 105 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 106 {
 107 #ifdef CONFIG_MAC80211_DEBUGFS
 108         struct rate_control_ref *ref = sta->rate_ctrl;
 109         if (ref && ref->ops->remove_sta_debugfs)
 110                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 111 #endif
 112 }
 113
 114 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
 115  * first available algorithm. */
 116 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 117                                  const char *name);
 118 void rate_control_deinitialize(struct ieee80211_local *local);
 119
 120
 121 /* Rate control algorithms */
 122 #ifdef CONFIG_MAC80211_RC_MINSTREL
 123 int rc80211_minstrel_init(void);
 124 void rc80211_minstrel_exit(void);
 125 #else
 126 static inline int rc80211_minstrel_init(void)
 127 {
 128         return 0;
 129 }
 130 static inline void rc80211_minstrel_exit(void)
 131 {
 132 }
 133 #endif
 134
 135 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 136 int rc80211_minstrel_ht_init(void);
 137 void rc80211_minstrel_ht_exit(void);
 138 #else
 139 static inline int rc80211_minstrel_ht_init(void)
 140 {
 141         return 0;
 142 }
 143 static inline void rc80211_minstrel_ht_exit(void)
 144 {
 145 }
 146 #endif
 147
 148
 149 #endif /* IEEE80211_RATE_H */