net/mac80211/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/mac80211.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         struct ieee80211_rate *nonerp;
  30
  31         /* parameters from the caller to rate_control_get_rate(): */
  32         struct ieee80211_hw_mode *mode;
  33         int mgmt_data; /* this is data frame that is used for management
  34                         * (e.g., IEEE 802.1X EAPOL) */
  35         u16 ethertype;
  36 };
  37
  38
  39 struct rate_control_ops {
  40         struct module *module;
  41         const char *name;
  42         void (*tx_status)(void *priv, struct net_device *dev,
  43                           struct sk_buff *skb,
  44                           struct ieee80211_tx_status *status);
  45         struct ieee80211_rate *(*get_rate)(void *priv, struct net_device *dev,
  46                                            struct sk_buff *skb,
  47                                            struct rate_control_extra *extra);
  48         void (*rate_init)(void *priv, void *priv_sta,
  49                           struct ieee80211_local *local, struct sta_info *sta);
  50         void (*clear)(void *priv);
  51
  52         void *(*alloc)(struct ieee80211_local *local);
  53         void (*free)(void *priv);
  54         void *(*alloc_sta)(void *priv, gfp_t gfp);
  55         void (*free_sta)(void *priv, void *priv_sta);
  56
  57         int (*add_attrs)(void *priv, struct kobject *kobj);
  58         void (*remove_attrs)(void *priv, struct kobject *kobj);
  59         void (*add_sta_debugfs)(void *priv, void *priv_sta,
  60                                 struct dentry *dir);
  61         void (*remove_sta_debugfs)(void *priv, void *priv_sta);
  62 };
  63
  64 struct rate_control_ref {
  65         struct rate_control_ops *ops;
  66         void *priv;
  67         struct kref kref;
  68 };
  69
  70 int ieee80211_rate_control_register(struct rate_control_ops *ops);
  71 void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
  72
  73 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
  74  * first available algorithm. */
  75 struct rate_control_ref *rate_control_alloc(const char *name,
  76                                             struct ieee80211_local *local);
  77 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
  78 void rate_control_put(struct rate_control_ref *ref);
  79
  80 static inline void rate_control_tx_status(struct ieee80211_local *local,
  81                                           struct net_device *dev,
  82                                           struct sk_buff *skb,
  83                                           struct ieee80211_tx_status *status)
  84 {
  85         struct rate_control_ref *ref = local->rate_ctrl;
  86         ref->ops->tx_status(ref->priv, dev, skb, status);
  87 }
  88
  89
  90 static inline struct ieee80211_rate *
  91 rate_control_get_rate(struct ieee80211_local *local, struct net_device *dev,
  92                       struct sk_buff *skb, struct rate_control_extra *extra)
  93 {
  94         struct rate_control_ref *ref = local->rate_ctrl;
  95         return ref->ops->get_rate(ref->priv, dev, skb, extra);
  96 }
  97
  98
  99 static inline void rate_control_rate_init(struct sta_info *sta,
 100                                           struct ieee80211_local *local)
 101 {
 102         struct rate_control_ref *ref = sta->rate_ctrl;
 103         ref->ops->rate_init(ref->priv, sta->rate_ctrl_priv, local, sta);
 104 }
 105
 106
 107 static inline void rate_control_clear(struct ieee80211_local *local)
 108 {
 109         struct rate_control_ref *ref = local->rate_ctrl;
 110         ref->ops->clear(ref->priv);
 111 }
 112
 113 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
 114                                            gfp_t gfp)
 115 {
 116         return ref->ops->alloc_sta(ref->priv, gfp);
 117 }
 118
 119 static inline void rate_control_free_sta(struct rate_control_ref *ref,
 120                                          void *priv)
 121 {
 122         ref->ops->free_sta(ref->priv, priv);
 123 }
 124
 125 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
 126 {
 127 #ifdef CONFIG_MAC80211_DEBUGFS
 128         struct rate_control_ref *ref = sta->rate_ctrl;
 129         if (sta->debugfs.dir && ref->ops->add_sta_debugfs)
 130                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 131                                           sta->debugfs.dir);
 132 #endif
 133 }
 134
 135 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 136 {
 137 #ifdef CONFIG_MAC80211_DEBUGFS
 138         struct rate_control_ref *ref = sta->rate_ctrl;
 139         if (ref->ops->remove_sta_debugfs)
 140                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 141 #endif
 142 }
 143
 144 #endif /* IEEE80211_RATE_H */