openwrt/target/linux/package/ieee80211-dscape/src/rate_control.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #ifndef RATE_CONTROL
  11 #define RATE_CONTROL
  12
  13 #define RATE_CONTROL_NUM_DOWN 20
  14 #define RATE_CONTROL_NUM_UP   15
  15
  16
  17 struct rate_control_extra {
  18         /* values from rate_control_get_rate() to the caller: */
  19         struct ieee80211_rate *probe; /* probe with this rate, or NULL for no
  20                                        * probing */
  21         int startidx, endidx, rateidx;
  22         struct ieee80211_rate *nonerp;
  23         int nonerp_idx;
  24
  25         /* parameters from the caller to rate_control_get_rate(): */
  26         int mgmt_data; /* this is data frame that is used for management
  27                         * (e.g., IEEE 802.1X EAPOL) */
  28         u16 ethertype;
  29 };
  30
  31
  32 struct rate_control_ops {
  33         const char *name;
  34         void (*tx_status)(struct net_device *dev, struct sk_buff *skb,
  35                           struct ieee80211_tx_status *status);
  36         struct ieee80211_rate *
  37         (*get_rate)(struct net_device *dev, struct sk_buff *skb,
  38                     struct rate_control_extra *extra);
  39         void (*rate_init)(struct ieee80211_local *local, struct sta_info *sta);
  40         void (*clear)(void *priv);
  41         int (*status_sta)(struct ieee80211_local *local,
  42                           struct sta_info *sta, char *buf);
  43         int (*status_global)(struct ieee80211_local *local, char *buf);
  44
  45         void * (*alloc)(struct ieee80211_local *local);
  46         void (*free)(void *priv);
  47         void * (*alloc_sta)(void);
  48         void (*free_sta)(void *priv);
  49 };
  50
  51
  52 int ieee80211_rate_control_register(struct rate_control_ops *ops);
  53 void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
  54
  55
  56 static inline void rate_control_tx_status(struct net_device *dev,
  57                                           struct sk_buff *skb,
  58                                           struct ieee80211_tx_status *status)
  59 {
  60         struct ieee80211_local *local = dev->priv;
  61         local->rate_ctrl->tx_status(dev, skb, status);
  62 }
  63
  64
  65 static inline struct ieee80211_rate *
  66 rate_control_get_rate(struct net_device *dev, struct sk_buff *skb,
  67                       struct rate_control_extra *extra)
  68 {
  69         struct ieee80211_local *local = dev->priv;
  70         return local->rate_ctrl->get_rate(dev, skb, extra);
  71 }
  72
  73
  74 static inline void rate_control_rate_init(struct ieee80211_local *local,
  75                                           struct sta_info *sta)
  76 {
  77         local->rate_ctrl->rate_init(local, sta);
  78 }
  79
  80
  81 static inline void rate_control_clear(struct ieee80211_local *local)
  82 {
  83         local->rate_ctrl->clear(local->rate_ctrl_priv);
  84 }
  85
  86
  87 static inline int rate_control_status_sta(struct ieee80211_local *local,
  88                                           struct sta_info *sta, char *buf)
  89 {
  90         return local->rate_ctrl->status_sta(local, sta, buf);
  91 }
  92
  93
  94 static inline int rate_control_status_global(struct ieee80211_local *local,
  95                                              char *buf)
  96 {
  97         return local->rate_ctrl->status_global(local, buf);
  98 }
  99
 100
 101 static inline void * rate_control_alloc(struct ieee80211_local *local)
 102 {
 103         return local->rate_ctrl->alloc(local);
 104 }
 105
 106
 107 static inline void rate_control_free(struct ieee80211_local *local)
 108 {
 109         if (local->rate_ctrl == NULL || local->rate_ctrl_priv == NULL)
 110                 return;
 111         local->rate_ctrl->free(local->rate_ctrl_priv);
 112         local->rate_ctrl_priv = NULL;
 113 }
 114
 115
 116 static inline void * rate_control_alloc_sta(struct ieee80211_local *local)
 117 {
 118         return local->rate_ctrl->alloc_sta();
 119 }
 120
 121
 122 static inline void rate_control_free_sta(struct ieee80211_local *local,
 123                                          void *priv)
 124 {
 125         local->rate_ctrl->free_sta(priv);
 126 }
 127
 128 #endif /* RATE_CONTROL */