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 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
  30  * first available algorithm. */
  31 struct rate_control_ref *rate_control_alloc(const char *name,
  32                                             struct ieee80211_local *local);
  33 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
  34                            struct sta_info *sta,
  35                            struct ieee80211_tx_rate_control *txrc);
  36 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
  37 void rate_control_put(struct rate_control_ref *ref);
  38
  39 static inline void rate_control_tx_status(struct ieee80211_local *local,
  40                                           struct ieee80211_supported_band *sband,
  41                                           struct sta_info *sta,
  42                                           struct sk_buff *skb)
  43 {
  44         struct rate_control_ref *ref = local->rate_ctrl;
  45         struct ieee80211_sta *ista = &sta->sta;
  46         void *priv_sta = sta->rate_ctrl_priv;
  47
  48         ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  49 }
  50
  51
  52 static inline void rate_control_rate_init(struct sta_info *sta)
  53 {
  54         struct ieee80211_local *local = sta->sdata->local;
  55         struct rate_control_ref *ref = sta->rate_ctrl;
  56         struct ieee80211_sta *ista = &sta->sta;
  57         void *priv_sta = sta->rate_ctrl_priv;
  58         struct ieee80211_supported_band *sband;
  59
  60         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
  61
  62         ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
  63 }
  64
  65 static inline void rate_control_rate_update(struct ieee80211_local *local,
  66                                     struct ieee80211_supported_band *sband,
  67                                     struct sta_info *sta, u32 changed)
  68 {
  69         struct rate_control_ref *ref = local->rate_ctrl;
  70         struct ieee80211_sta *ista = &sta->sta;
  71         void *priv_sta = sta->rate_ctrl_priv;
  72
  73         if (ref->ops->rate_update)
  74                 ref->ops->rate_update(ref->priv, sband, ista,
  75                                       priv_sta, changed);
  76 }
  77
  78 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  79                                            struct ieee80211_sta *sta,
  80                                            gfp_t gfp)
  81 {
  82         return ref->ops->alloc_sta(ref->priv, 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 (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->ops->remove_sta_debugfs)
 109                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 110 #endif
 111 }
 112
 113 /* functions for rate control related to a device */
 114 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 115                                  const char *name);
 116 void rate_control_deinitialize(struct ieee80211_local *local);
 117
 118
 119 /* Rate control algorithms */
 120 #ifdef CONFIG_MAC80211_RC_PID
 121 extern int rc80211_pid_init(void);
 122 extern void rc80211_pid_exit(void);
 123 #else
 124 static inline int rc80211_pid_init(void)
 125 {
 126         return 0;
 127 }
 128 static inline void rc80211_pid_exit(void)
 129 {
 130 }
 131 #endif
 132
 133 #ifdef CONFIG_MAC80211_RC_MINSTREL
 134 extern int rc80211_minstrel_init(void);
 135 extern void rc80211_minstrel_exit(void);
 136 #else
 137 static inline int rc80211_minstrel_init(void)
 138 {
 139         return 0;
 140 }
 141 static inline void rc80211_minstrel_exit(void)
 142 {
 143 }
 144 #endif
 145
 146
 147 #endif /* IEEE80211_RATE_H */