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 if (!ref) 63 return; 64 65 sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; 66 67 ref->ops->rate_init(ref->priv, sband, ista, priv_sta); 68 } 69 70 static inline void rate_control_rate_update(struct ieee80211_local *local, 71 struct ieee80211_supported_band *sband, 72 struct sta_info *sta, u32 changed) 73 { 74 struct rate_control_ref *ref = local->rate_ctrl; 75 struct ieee80211_sta *ista = &sta->sta; 76 void *priv_sta = sta->rate_ctrl_priv; 77 78 if (ref && ref->ops->rate_update) 79 ref->ops->rate_update(ref->priv, sband, ista, 80 priv_sta, changed); 81 } 82 83 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, 84 struct ieee80211_sta *sta, 85 gfp_t gfp) 86 { 87 return ref->ops->alloc_sta(ref->priv, sta, gfp); 88 } 89 90 static inline void rate_control_free_sta(struct sta_info *sta) 91 { 92 struct rate_control_ref *ref = sta->rate_ctrl; 93 struct ieee80211_sta *ista = &sta->sta; 94 void *priv_sta = sta->rate_ctrl_priv; 95 96 ref->ops->free_sta(ref->priv, ista, priv_sta); 97 } 98 99 static inline void rate_control_add_sta_debugfs(struct sta_info *sta) 100 { 101 #ifdef CONFIG_MAC80211_DEBUGFS 102 struct rate_control_ref *ref = sta->rate_ctrl; 103 if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs) 104 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv, 105 sta->debugfs.dir); 106 #endif 107 } 108 109 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta) 110 { 111 #ifdef CONFIG_MAC80211_DEBUGFS 112 struct rate_control_ref *ref = sta->rate_ctrl; 113 if (ref && ref->ops->remove_sta_debugfs) 114 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv); 115 #endif 116 } 117 118 /* functions for rate control related to a device */ 119 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, 120 const char *name); 121 void rate_control_deinitialize(struct ieee80211_local *local); 122 123 124 /* Rate control algorithms */ 125 #ifdef CONFIG_MAC80211_RC_PID 126 extern int rc80211_pid_init(void); 127 extern void rc80211_pid_exit(void); 128 #else 129 static inline int rc80211_pid_init(void) 130 { 131 return 0; 132 } 133 static inline void rc80211_pid_exit(void) 134 { 135 } 136 #endif 137 138 #ifdef CONFIG_MAC80211_RC_MINSTREL 139 extern int rc80211_minstrel_init(void); 140 extern void rc80211_minstrel_exit(void); 141 #else 142 static inline int rc80211_minstrel_init(void) 143 { 144 return 0; 145 } 146 static inline void rc80211_minstrel_exit(void) 147 { 148 } 149 #endif 150 151 152 #endif /* IEEE80211_RATE_H */ 153