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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 <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 ieee80211_supported_band *sband,
  35                            struct sta_info *sta, struct sk_buff *skb,
  36                            struct rate_selection *sel);
  37 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
  38 void rate_control_put(struct rate_control_ref *ref);
  39
  40 static inline void rate_control_tx_status(struct ieee80211_local *local,
  41                                           struct ieee80211_supported_band *sband,
  42                                           struct sta_info *sta,
  43                                           struct sk_buff *skb)
  44 {
  45         struct rate_control_ref *ref = local->rate_ctrl;
  46         struct ieee80211_sta *ista = &sta->sta;
  47         void *priv_sta = sta->rate_ctrl_priv;
  48
  49         ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  50 }
  51
  52
  53 static inline void rate_control_rate_init(struct sta_info *sta)
  54 {
  55         struct ieee80211_local *local = sta->sdata->local;
  56         struct rate_control_ref *ref = sta->rate_ctrl;
  57         struct ieee80211_sta *ista = &sta->sta;
  58         void *priv_sta = sta->rate_ctrl_priv;
  59         struct ieee80211_supported_band *sband;
  60
  61         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
  62
  63         ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
  64 }
  65
  66
  67 static inline void rate_control_clear(struct ieee80211_local *local)
  68 {
  69         struct rate_control_ref *ref = local->rate_ctrl;
  70         ref->ops->clear(ref->priv);
  71 }
  72
  73 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  74                                            struct ieee80211_sta *sta,
  75                                            gfp_t gfp)
  76 {
  77         return ref->ops->alloc_sta(ref->priv, sta, gfp);
  78 }
  79
  80 static inline void rate_control_free_sta(struct sta_info *sta)
  81 {
  82         struct rate_control_ref *ref = sta->rate_ctrl;
  83         struct ieee80211_sta *ista = &sta->sta;
  84         void *priv_sta = sta->rate_ctrl_priv;
  85
  86         ref->ops->free_sta(ref->priv, ista, priv_sta);
  87 }
  88
  89 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
  90 {
  91 #ifdef CONFIG_MAC80211_DEBUGFS
  92         struct rate_control_ref *ref = sta->rate_ctrl;
  93         if (sta->debugfs.dir && ref->ops->add_sta_debugfs)
  94                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
  95                                           sta->debugfs.dir);
  96 #endif
  97 }
  98
  99 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 100 {
 101 #ifdef CONFIG_MAC80211_DEBUGFS
 102         struct rate_control_ref *ref = sta->rate_ctrl;
 103         if (ref->ops->remove_sta_debugfs)
 104                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 105 #endif
 106 }
 107
 108 /* functions for rate control related to a device */
 109 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 110                                  const char *name);
 111 void rate_control_deinitialize(struct ieee80211_local *local);
 112
 113
 114 /* Rate control algorithms */
 115 #ifdef CONFIG_MAC80211_RC_PID
 116 extern int rc80211_pid_init(void);
 117 extern void rc80211_pid_exit(void);
 118 #else
 119 static inline int rc80211_pid_init(void)
 120 {
 121         return 0;
 122 }
 123 static inline void rc80211_pid_exit(void)
 124 {
 125 }
 126 #endif
 127
 128 #endif /* IEEE80211_RATE_H */