LXR linux/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
  22struct 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. */
  31struct rate_control_ref *rate_control_alloc(const char *name,
  32                                            struct ieee80211_local *local);
  33void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
  34                           struct sta_info *sta,
  35                           struct ieee80211_tx_rate_control *txrc);
  36struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
  37void rate_control_put(struct rate_control_ref *ref);
  38
  39static 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        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  48
  49        if (likely(info->flags & IEEE80211_TX_INTFL_RCALGO))
  50                ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  51}
  52
  53
  54static inline void rate_control_rate_init(struct sta_info *sta)
  55{
  56        struct ieee80211_local *local = sta->sdata->local;
  57        struct rate_control_ref *ref = sta->rate_ctrl;
  58        struct ieee80211_sta *ista = &sta->sta;
  59        void *priv_sta = sta->rate_ctrl_priv;
  60        struct ieee80211_supported_band *sband;
  61
  62        sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
  63
  64        ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
  65}
  66
  67static inline void rate_control_rate_update(struct ieee80211_local *local,
  68                                    struct ieee80211_supported_band *sband,
  69                                    struct sta_info *sta, u32 changed)
  70{
  71        struct rate_control_ref *ref = local->rate_ctrl;
  72        struct ieee80211_sta *ista = &sta->sta;
  73        void *priv_sta = sta->rate_ctrl_priv;
  74
  75        if (ref->ops->rate_update)
  76                ref->ops->rate_update(ref->priv, sband, ista,
  77                                      priv_sta, changed);
  78}
  79
  80static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
  81                                           struct ieee80211_sta *sta,
  82                                           gfp_t gfp)
  83{
  84        return ref->ops->alloc_sta(ref->priv, sta, gfp);
  85}
  86
  87static inline void rate_control_free_sta(struct sta_info *sta)
  88{
  89        struct rate_control_ref *ref = sta->rate_ctrl;
  90        struct ieee80211_sta *ista = &sta->sta;
  91        void *priv_sta = sta->rate_ctrl_priv;
  92
  93        ref->ops->free_sta(ref->priv, ista, priv_sta);
  94}
  95
  96static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
  97{
  98#ifdef CONFIG_MAC80211_DEBUGFS
  99        struct rate_control_ref *ref = sta->rate_ctrl;
 100        if (sta->debugfs.dir && ref->ops->add_sta_debugfs)
 101                ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 102                                          sta->debugfs.dir);
 103#endif
 104}
 105
 106static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 107{
 108#ifdef CONFIG_MAC80211_DEBUGFS
 109        struct rate_control_ref *ref = sta->rate_ctrl;
 110        if (ref->ops->remove_sta_debugfs)
 111                ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 112#endif
 113}
 114
 115/* functions for rate control related to a device */
 116int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 117                                 const char *name);
 118void rate_control_deinitialize(struct ieee80211_local *local);
 119
 120
 121/* Rate control algorithms */
 122#ifdef CONFIG_MAC80211_RC_PID
 123extern int rc80211_pid_init(void);
 124extern void rc80211_pid_exit(void);
 125#else
 126static inline int rc80211_pid_init(void)
 127{
 128        return 0;
 129}
 130static inline void rc80211_pid_exit(void)
 131{
 132}
 133#endif
 134
 135#ifdef CONFIG_MAC80211_RC_MINSTREL
 136extern int rc80211_minstrel_init(void);
 137extern void rc80211_minstrel_exit(void);
 138#else
 139static inline int rc80211_minstrel_init(void)
 140{
 141        return 0;
 142}
 143static inline void rc80211_minstrel_exit(void)
 144{
 145}
 146#endif
 147
 148
 149#endif /* IEEE80211_RATE_H */
 150