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 #include "driver-ops.h" 21 22 struct rate_control_ref { 23 struct ieee80211_local *local; 24 struct rate_control_ops *ops; 25 void *priv; 26 }; 27 28 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata, 29 struct sta_info *sta, 30 struct ieee80211_tx_rate_control *txrc); 31 32 static inline void rate_control_tx_status(struct ieee80211_local *local, 33 struct ieee80211_supported_band *sband, 34 struct sta_info *sta, 35 struct sk_buff *skb) 36 { 37 struct rate_control_ref *ref = local->rate_ctrl; 38 struct ieee80211_sta *ista = &sta->sta; 39 void *priv_sta = sta->rate_ctrl_priv; 40 41 if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) 42 return; 43 44 ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb); 45 } 46 47 48 static inline void rate_control_rate_init(struct sta_info *sta) 49 { 50 struct ieee80211_local *local = sta->sdata->local; 51 struct rate_control_ref *ref = sta->rate_ctrl; 52 struct ieee80211_sta *ista = &sta->sta; 53 void *priv_sta = sta->rate_ctrl_priv; 54 struct ieee80211_supported_band *sband; 55 struct ieee80211_chanctx_conf *chanctx_conf; 56 57 if (!ref) 58 return; 59 60 rcu_read_lock(); 61 62 chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf); 63 if (WARN_ON(!chanctx_conf)) { 64 rcu_read_unlock(); 65 return; 66 } 67 68 sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band]; 69 rcu_read_unlock(); 70 71 ref->ops->rate_init(ref->priv, sband, ista, priv_sta); 72 set_sta_flag(sta, WLAN_STA_RATE_CONTROL); 73 } 74 75 static inline void rate_control_rate_update(struct ieee80211_local *local, 76 struct ieee80211_supported_band *sband, 77 struct sta_info *sta, u32 changed) 78 { 79 struct rate_control_ref *ref = local->rate_ctrl; 80 struct ieee80211_sta *ista = &sta->sta; 81 void *priv_sta = sta->rate_ctrl_priv; 82 83 if (ref && ref->ops->rate_update) 84 ref->ops->rate_update(ref->priv, sband, ista, 85 priv_sta, changed); 86 drv_sta_rc_update(local, sta->sdata, &sta->sta, changed); 87 } 88 89 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, 90 struct ieee80211_sta *sta, 91 gfp_t gfp) 92 { 93 return ref->ops->alloc_sta(ref->priv, sta, gfp); 94 } 95 96 static inline void rate_control_free_sta(struct sta_info *sta) 97 { 98 struct rate_control_ref *ref = sta->rate_ctrl; 99 struct ieee80211_sta *ista = &sta->sta; 100 void *priv_sta = sta->rate_ctrl_priv; 101 102 ref->ops->free_sta(ref->priv, ista, priv_sta); 103 } 104 105 static inline void rate_control_add_sta_debugfs(struct sta_info *sta) 106 { 107 #ifdef CONFIG_MAC80211_DEBUGFS 108 struct rate_control_ref *ref = sta->rate_ctrl; 109 if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs) 110 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv, 111 sta->debugfs.dir); 112 #endif 113 } 114 115 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta) 116 { 117 #ifdef CONFIG_MAC80211_DEBUGFS 118 struct rate_control_ref *ref = sta->rate_ctrl; 119 if (ref && ref->ops->remove_sta_debugfs) 120 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv); 121 #endif 122 } 123 124 /* Get a reference to the rate control algorithm. If `name' is NULL, get the 125 * first available algorithm. */ 126 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, 127 const char *name); 128 void rate_control_deinitialize(struct ieee80211_local *local); 129 130 131 /* Rate control algorithms */ 132 #ifdef CONFIG_MAC80211_RC_PID 133 extern int rc80211_pid_init(void); 134 extern void rc80211_pid_exit(void); 135 #else 136 static inline int rc80211_pid_init(void) 137 { 138 return 0; 139 } 140 static inline void rc80211_pid_exit(void) 141 { 142 } 143 #endif 144 145 #ifdef CONFIG_MAC80211_RC_MINSTREL 146 extern int rc80211_minstrel_init(void); 147 extern void rc80211_minstrel_exit(void); 148 #else 149 static inline int rc80211_minstrel_init(void) 150 { 151 return 0; 152 } 153 static inline void rc80211_minstrel_exit(void) 154 { 155 } 156 #endif 157 158 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT 159 extern int rc80211_minstrel_ht_init(void); 160 extern void rc80211_minstrel_ht_exit(void); 161 #else 162 static inline int rc80211_minstrel_ht_init(void) 163 { 164 return 0; 165 } 166 static inline void rc80211_minstrel_ht_exit(void) 167 { 168 } 169 #endif 170 171 172 #endif /* IEEE80211_RATE_H */ 173