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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         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 
 41         if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
 42                 return;
 43 
 44         ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
 45 }
 46 
 47 
 48 static inline void rate_control_rate_init(struct sta_info *sta)
 49 {
 50         struct ieee80211_local *local = sta->sdata->local;
 51         struct rate_control_ref *ref = sta->rate_ctrl;
 52         struct ieee80211_sta *ista = &sta->sta;
 53         void *priv_sta = sta->rate_ctrl_priv;
 54         struct ieee80211_supported_band *sband;
 55         struct ieee80211_chanctx_conf *chanctx_conf;
 56 
 57         if (!ref)
 58                 return;
 59 
 60         rcu_read_lock();
 61 
 62         chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
 63         if (WARN_ON(!chanctx_conf)) {
 64                 rcu_read_unlock();
 65                 return;
 66         }
 67 
 68         sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
 69 
 70         ieee80211_sta_set_rx_nss(sta);
 71 
 72         ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista,
 73                             priv_sta);
 74         rcu_read_unlock();
 75         set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
 76 }
 77 
 78 static inline void rate_control_rate_update(struct ieee80211_local *local,
 79                                     struct ieee80211_supported_band *sband,
 80                                     struct sta_info *sta, u32 changed)
 81 {
 82         struct rate_control_ref *ref = local->rate_ctrl;
 83         struct ieee80211_sta *ista = &sta->sta;
 84         void *priv_sta = sta->rate_ctrl_priv;
 85         struct ieee80211_chanctx_conf *chanctx_conf;
 86 
 87         if (ref && ref->ops->rate_update) {
 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                 ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def,
 97                                       ista, priv_sta, changed);
 98                 rcu_read_unlock();
 99         }
100         drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
101 }
102 
103 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
104                                            struct ieee80211_sta *sta,
105                                            gfp_t gfp)
106 {
107         return ref->ops->alloc_sta(ref->priv, sta, gfp);
108 }
109 
110 static inline void rate_control_free_sta(struct sta_info *sta)
111 {
112         struct rate_control_ref *ref = sta->rate_ctrl;
113         struct ieee80211_sta *ista = &sta->sta;
114         void *priv_sta = sta->rate_ctrl_priv;
115 
116         ref->ops->free_sta(ref->priv, ista, priv_sta);
117 }
118 
119 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
120 {
121 #ifdef CONFIG_MAC80211_DEBUGFS
122         struct rate_control_ref *ref = sta->rate_ctrl;
123         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
124                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
125                                           sta->debugfs.dir);
126 #endif
127 }
128 
129 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
130 {
131 #ifdef CONFIG_MAC80211_DEBUGFS
132         struct rate_control_ref *ref = sta->rate_ctrl;
133         if (ref && ref->ops->remove_sta_debugfs)
134                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
135 #endif
136 }
137 
138 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
139  * first available algorithm. */
140 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
141                                  const char *name);
142 void rate_control_deinitialize(struct ieee80211_local *local);
143 
144 
145 /* Rate control algorithms */
146 #ifdef CONFIG_MAC80211_RC_PID
147 extern int rc80211_pid_init(void);
148 extern void rc80211_pid_exit(void);
149 #else
150 static inline int rc80211_pid_init(void)
151 {
152         return 0;
153 }
154 static inline void rc80211_pid_exit(void)
155 {
156 }
157 #endif
158 
159 #ifdef CONFIG_MAC80211_RC_MINSTREL
160 extern int rc80211_minstrel_init(void);
161 extern void rc80211_minstrel_exit(void);
162 #else
163 static inline int rc80211_minstrel_init(void)
164 {
165         return 0;
166 }
167 static inline void rc80211_minstrel_exit(void)
168 {
169 }
170 #endif
171 
172 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
173 extern int rc80211_minstrel_ht_init(void);
174 extern void rc80211_minstrel_ht_exit(void);
175 #else
176 static inline int rc80211_minstrel_ht_init(void)
177 {
178         return 0;
179 }
180 static inline void rc80211_minstrel_ht_exit(void)
181 {
182 }
183 #endif
184 
185 
186 #endif /* IEEE80211_RATE_H */
187 

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