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         const struct rate_control_ops *ops;
  24         void *priv;
  25 };
  26
  27 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
  28                            struct sta_info *sta,
  29                            struct ieee80211_tx_rate_control *txrc);
  30
  31 static inline void rate_control_tx_status(struct ieee80211_local *local,
  32                                           struct ieee80211_supported_band *sband,
  33                                           struct sta_info *sta,
  34                                           struct sk_buff *skb)
  35 {
  36         struct rate_control_ref *ref = local->rate_ctrl;
  37         struct ieee80211_sta *ista = &sta->sta;
  38         void *priv_sta = sta->rate_ctrl_priv;
  39         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  40
  41         if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  42                 return;
  43
  44         spin_lock_bh(&sta->rate_ctrl_lock);
  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         spin_unlock_bh(&sta->rate_ctrl_lock);
  50 }
  51
  52 static inline void
  53 rate_control_tx_status_noskb(struct ieee80211_local *local,
  54                              struct ieee80211_supported_band *sband,
  55                              struct sta_info *sta,
  56                              struct ieee80211_tx_info *info)
  57 {
  58         struct rate_control_ref *ref = local->rate_ctrl;
  59         struct ieee80211_sta *ista = &sta->sta;
  60         void *priv_sta = sta->rate_ctrl_priv;
  61
  62         if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  63                 return;
  64
  65         if (WARN_ON_ONCE(!ref->ops->tx_status_noskb))
  66                 return;
  67
  68         spin_lock_bh(&sta->rate_ctrl_lock);
  69         ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
  70         spin_unlock_bh(&sta->rate_ctrl_lock);
  71 }
  72
  73 void rate_control_rate_init(struct sta_info *sta);
  74 void rate_control_rate_update(struct ieee80211_local *local,
  75                                     struct ieee80211_supported_band *sband,
  76                                     struct sta_info *sta, u32 changed);
  77
  78 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  79                                            struct sta_info *sta, gfp_t gfp)
  80 {
  81         spin_lock_init(&sta->rate_ctrl_lock);
  82         return ref->ops->alloc_sta(ref->priv, &sta->sta, gfp);
  83 }
  84
  85 static inline void rate_control_free_sta(struct sta_info *sta)
  86 {
  87         struct rate_control_ref *ref = sta->rate_ctrl;
  88         struct ieee80211_sta *ista = &sta->sta;
  89         void *priv_sta = sta->rate_ctrl_priv;
  90
  91         ref->ops->free_sta(ref->priv, ista, priv_sta);
  92 }
  93
  94 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
  95 {
  96 #ifdef CONFIG_MAC80211_DEBUGFS
  97         struct rate_control_ref *ref = sta->rate_ctrl;
  98         if (ref && sta->debugfs_dir && ref->ops->add_sta_debugfs)
  99                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 100                                           sta->debugfs_dir);
 101 #endif
 102 }
 103
 104 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 105 {
 106 #ifdef CONFIG_MAC80211_DEBUGFS
 107         struct rate_control_ref *ref = sta->rate_ctrl;
 108         if (ref && ref->ops->remove_sta_debugfs)
 109                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 110 #endif
 111 }
 112
 113 void ieee80211_check_rate_mask(struct ieee80211_sub_if_data *sdata);
 114
 115 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
 116  * first available algorithm. */
 117 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 118                                  const char *name);
 119 void rate_control_deinitialize(struct ieee80211_local *local);
 120
 121
 122 /* Rate control algorithms */
 123 #ifdef CONFIG_MAC80211_RC_MINSTREL
 124 int rc80211_minstrel_init(void);
 125 void rc80211_minstrel_exit(void);
 126 #else
 127 static inline int rc80211_minstrel_init(void)
 128 {
 129         return 0;
 130 }
 131 static inline void rc80211_minstrel_exit(void)
 132 {
 133 }
 134 #endif
 135
 136 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 137 int rc80211_minstrel_ht_init(void);
 138 void rc80211_minstrel_ht_exit(void);
 139 #else
 140 static inline int rc80211_minstrel_ht_init(void)
 141 {
 142         return 0;
 143 }
 144 static inline void rc80211_minstrel_ht_exit(void)
 145 {
 146 }
 147 #endif
 148
 149
 150 #endif /* IEEE80211_RATE_H */