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TOMOYO Linux Cross Reference
Linux/net/mac80211/rate.h

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  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 static inline void rate_control_rate_init(struct sta_info *sta)
 75 {
 76         struct ieee80211_local *local = sta->sdata->local;
 77         struct rate_control_ref *ref = sta->rate_ctrl;
 78         struct ieee80211_sta *ista = &sta->sta;
 79         void *priv_sta = sta->rate_ctrl_priv;
 80         struct ieee80211_supported_band *sband;
 81         struct ieee80211_chanctx_conf *chanctx_conf;
 82 
 83         ieee80211_sta_set_rx_nss(sta);
 84 
 85         if (!ref)
 86                 return;
 87 
 88         rcu_read_lock();
 89 
 90         chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
 91         if (WARN_ON(!chanctx_conf)) {
 92                 rcu_read_unlock();
 93                 return;
 94         }
 95 
 96         sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
 97 
 98         spin_lock_bh(&sta->rate_ctrl_lock);
 99         ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista,
100                             priv_sta);
101         spin_unlock_bh(&sta->rate_ctrl_lock);
102         rcu_read_unlock();
103         set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
104 }
105 
106 static inline void rate_control_rate_update(struct ieee80211_local *local,
107                                     struct ieee80211_supported_band *sband,
108                                     struct sta_info *sta, u32 changed)
109 {
110         struct rate_control_ref *ref = local->rate_ctrl;
111         struct ieee80211_sta *ista = &sta->sta;
112         void *priv_sta = sta->rate_ctrl_priv;
113         struct ieee80211_chanctx_conf *chanctx_conf;
114 
115         if (ref && ref->ops->rate_update) {
116                 rcu_read_lock();
117 
118                 chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
119                 if (WARN_ON(!chanctx_conf)) {
120                         rcu_read_unlock();
121                         return;
122                 }
123 
124                 spin_lock_bh(&sta->rate_ctrl_lock);
125                 ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def,
126                                       ista, priv_sta, changed);
127                 spin_unlock_bh(&sta->rate_ctrl_lock);
128                 rcu_read_unlock();
129         }
130         drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
131 }
132 
133 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
134                                            struct sta_info *sta, gfp_t gfp)
135 {
136         spin_lock_init(&sta->rate_ctrl_lock);
137         return ref->ops->alloc_sta(ref->priv, &sta->sta, gfp);
138 }
139 
140 static inline void rate_control_free_sta(struct sta_info *sta)
141 {
142         struct rate_control_ref *ref = sta->rate_ctrl;
143         struct ieee80211_sta *ista = &sta->sta;
144         void *priv_sta = sta->rate_ctrl_priv;
145 
146         ref->ops->free_sta(ref->priv, ista, priv_sta);
147 }
148 
149 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
150 {
151 #ifdef CONFIG_MAC80211_DEBUGFS
152         struct rate_control_ref *ref = sta->rate_ctrl;
153         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
154                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
155                                           sta->debugfs.dir);
156 #endif
157 }
158 
159 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
160 {
161 #ifdef CONFIG_MAC80211_DEBUGFS
162         struct rate_control_ref *ref = sta->rate_ctrl;
163         if (ref && ref->ops->remove_sta_debugfs)
164                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
165 #endif
166 }
167 
168 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
169  * first available algorithm. */
170 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
171                                  const char *name);
172 void rate_control_deinitialize(struct ieee80211_local *local);
173 
174 
175 /* Rate control algorithms */
176 #ifdef CONFIG_MAC80211_RC_MINSTREL
177 int rc80211_minstrel_init(void);
178 void rc80211_minstrel_exit(void);
179 #else
180 static inline int rc80211_minstrel_init(void)
181 {
182         return 0;
183 }
184 static inline void rc80211_minstrel_exit(void)
185 {
186 }
187 #endif
188 
189 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
190 int rc80211_minstrel_ht_init(void);
191 void rc80211_minstrel_ht_exit(void);
192 #else
193 static inline int rc80211_minstrel_ht_init(void)
194 {
195         return 0;
196 }
197 static inline void rc80211_minstrel_ht_exit(void)
198 {
199 }
200 #endif
201 
202 
203 #endif /* IEEE80211_RATE_H */
204 

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