package/d80211/src/ieee80211_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/d80211.h>
  18 #include "ieee80211_i.h"
  19 #include "sta_info.h"
  20
  21 #define RATE_CONTROL_NUM_DOWN 20
  22 #define RATE_CONTROL_NUM_UP   15
  23
  24
  25 struct rate_control_extra {
  26         /* values from rate_control_get_rate() to the caller: */
  27         struct ieee80211_rate *probe; /* probe with this rate, or NULL for no
  28                                        * probing */
  29         int startidx, endidx, rateidx;
  30         struct ieee80211_rate *nonerp;
  31         int nonerp_idx;
  32
  33         /* parameters from the caller to rate_control_get_rate(): */
  34         int mgmt_data; /* this is data frame that is used for management
  35                         * (e.g., IEEE 802.1X EAPOL) */
  36         u16 ethertype;
  37 };
  38
  39
  40 struct rate_control_ops {
  41         struct module *module;
  42         const char *name;
  43         void (*tx_status)(void *priv, struct net_device *dev,
  44                           struct sk_buff *skb,
  45                           struct ieee80211_tx_status *status);
  46         struct ieee80211_rate *(*get_rate)(void *priv, struct net_device *dev,
  47                                            struct sk_buff *skb,
  48                                            struct rate_control_extra *extra);
  49         void (*rate_init)(void *priv, void *priv_sta,
  50                           struct ieee80211_local *local, struct sta_info *sta);
  51         void (*clear)(void *priv);
  52
  53         void *(*alloc)(struct ieee80211_local *local);
  54         void (*free)(void *priv);
  55         void *(*alloc_sta)(void *priv, gfp_t gfp);
  56         void (*free_sta)(void *priv, void *priv_sta);
  57
  58         int (*add_attrs)(void *priv, struct kobject *kobj);
  59         void (*remove_attrs)(void *priv, struct kobject *kobj);
  60         int (*add_sta_attrs)(void *priv, void *priv_sta,
  61                              struct kobject *kobj);
  62         void (*remove_sta_attrs)(void *priv, void *priv_sta,
  63                                  struct kobject *kobj);
  64 };
  65
  66 struct rate_control_ref {
  67         struct rate_control_ops *ops;
  68         void *priv;
  69         struct kref kref;
  70 };
  71
  72 int ieee80211_rate_control_register(struct rate_control_ops *ops);
  73 void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
  74
  75 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
  76  * first available algorithm. */
  77 struct rate_control_ref *rate_control_alloc(const char *name,
  78                                             struct ieee80211_local *local);
  79 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
  80 void rate_control_put(struct rate_control_ref *ref);
  81
  82 static inline void rate_control_tx_status(struct ieee80211_local *local,
  83                                           struct net_device *dev,
  84                                           struct sk_buff *skb,
  85                                           struct ieee80211_tx_status *status)
  86 {
  87         struct rate_control_ref *ref = local->rate_ctrl;
  88         ref->ops->tx_status(ref->priv, dev, skb, status);
  89 }
  90
  91
  92 static inline struct ieee80211_rate *
  93 rate_control_get_rate(struct ieee80211_local *local, struct net_device *dev,
  94                       struct sk_buff *skb, struct rate_control_extra *extra)
  95 {
  96         struct rate_control_ref *ref = local->rate_ctrl;
  97         return ref->ops->get_rate(ref->priv, dev, skb, extra);
  98 }
  99
 100
 101 static inline void rate_control_rate_init(struct sta_info *sta,
 102                                           struct ieee80211_local *local)
 103 {
 104         struct rate_control_ref *ref = sta->rate_ctrl;
 105         ref->ops->rate_init(ref->priv, sta->rate_ctrl_priv, local, sta);
 106 }
 107
 108
 109 static inline void rate_control_clear(struct ieee80211_local *local)
 110 {
 111         struct rate_control_ref *ref = local->rate_ctrl;
 112         ref->ops->clear(ref->priv);
 113 }
 114
 115 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
 116                                            gfp_t gfp)
 117 {
 118         return ref->ops->alloc_sta(ref->priv, gfp);
 119 }
 120
 121 static inline void rate_control_free_sta(struct rate_control_ref *ref,
 122                                          void *priv)
 123 {
 124         ref->ops->free_sta(ref->priv, priv);
 125 }
 126
 127 static inline int rate_control_add_attrs(struct rate_control_ref *ref,
 128                                          struct kobject *kobj)
 129 {
 130         if (ref->ops->add_attrs)
 131                 return ref->ops->add_attrs(ref->priv, kobj);
 132         return 0;
 133 }
 134
 135 static inline void rate_control_remove_attrs(struct rate_control_ref *ref,
 136                                              struct kobject *kobj)
 137 {
 138         if (ref->ops->remove_attrs)
 139                 ref->ops->remove_attrs(ref->priv, kobj);
 140 }
 141
 142 static inline int rate_control_add_sta_attrs(struct sta_info *sta,
 143                                              struct kobject *kobj)
 144 {
 145         struct rate_control_ref *ref = sta->rate_ctrl;
 146         if (ref->ops->add_sta_attrs)
 147                 return ref->ops->add_sta_attrs(ref->priv, sta->rate_ctrl_priv,
 148                                                kobj);
 149         return 0;
 150 }
 151
 152 static inline void rate_control_remove_sta_attrs(struct sta_info *sta,
 153                                                  struct kobject *kobj)
 154 {
 155         struct rate_control_ref *ref = sta->rate_ctrl;
 156         if (ref->ops->remove_sta_attrs)
 157                 ref->ops->remove_sta_attrs(ref->priv, sta->rate_ctrl_priv,
 158                                            kobj);
 159 }
 160
 161 #endif /* IEEE80211_RATE_H */