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 sta_info *sta, 35 struct ieee80211_tx_rate_control *txrc); 36 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref); 37 void rate_control_put(struct rate_control_ref *ref); 38 39 static 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 54 static 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 67 static 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 80 static 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 87 static 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 96 static 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 } 105 106 static 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 */ 116 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, 117 const char *name); 118 void rate_control_deinitialize(struct ieee80211_local *local); 119 120 121 /* Rate control algorithms */ 122 #ifdef CONFIG_MAC80211_RC_PID 123 extern int rc80211_pid_init(void); 124 extern void rc80211_pid_exit(void); 125 #else 126 static inline int rc80211_pid_init(void) 127 { 128 return 0; 129 } 130 static inline void rc80211_pid_exit(void) 131 { 132 } 133 #endif 134 135 #ifdef CONFIG_MAC80211_RC_MINSTREL 136 extern int rc80211_minstrel_init(void); 137 extern void rc80211_minstrel_exit(void); 138 #else 139 static inline int rc80211_minstrel_init(void) 140 { 141 return 0; 142 } 143 static inline void rc80211_minstrel_exit(void) 144 { 145 } 146 #endif 147 148 149 #endif /* IEEE80211_RATE_H */ 150