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 70 ieee80211_sta_set_rx_nss(sta); 71 72 ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista, 73 priv_sta); 74 rcu_read_unlock(); 75 set_sta_flag(sta, WLAN_STA_RATE_CONTROL); 76 } 77 78 static inline void rate_control_rate_update(struct ieee80211_local *local, 79 struct ieee80211_supported_band *sband, 80 struct sta_info *sta, u32 changed) 81 { 82 struct rate_control_ref *ref = local->rate_ctrl; 83 struct ieee80211_sta *ista = &sta->sta; 84 void *priv_sta = sta->rate_ctrl_priv; 85 struct ieee80211_chanctx_conf *chanctx_conf; 86 87 if (ref && ref->ops->rate_update) { 88 rcu_read_lock(); 89 90 chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf); 91 if (WARN_ON(!chanctx_conf)) { 92 rcu_read_unlock(); 93 return; 94 } 95 96 ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def, 97 ista, priv_sta, changed); 98 rcu_read_unlock(); 99 } 100 drv_sta_rc_update(local, sta->sdata, &sta->sta, changed); 101 } 102 103 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, 104 struct ieee80211_sta *sta, 105 gfp_t gfp) 106 { 107 return ref->ops->alloc_sta(ref->priv, sta, gfp); 108 } 109 110 static inline void rate_control_free_sta(struct sta_info *sta) 111 { 112 struct rate_control_ref *ref = sta->rate_ctrl; 113 struct ieee80211_sta *ista = &sta->sta; 114 void *priv_sta = sta->rate_ctrl_priv; 115 116 ref->ops->free_sta(ref->priv, ista, priv_sta); 117 } 118 119 static inline void rate_control_add_sta_debugfs(struct sta_info *sta) 120 { 121 #ifdef CONFIG_MAC80211_DEBUGFS 122 struct rate_control_ref *ref = sta->rate_ctrl; 123 if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs) 124 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv, 125 sta->debugfs.dir); 126 #endif 127 } 128 129 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta) 130 { 131 #ifdef CONFIG_MAC80211_DEBUGFS 132 struct rate_control_ref *ref = sta->rate_ctrl; 133 if (ref && ref->ops->remove_sta_debugfs) 134 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv); 135 #endif 136 } 137 138 /* Get a reference to the rate control algorithm. If `name' is NULL, get the 139 * first available algorithm. */ 140 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, 141 const char *name); 142 void rate_control_deinitialize(struct ieee80211_local *local); 143 144 145 /* Rate control algorithms */ 146 #ifdef CONFIG_MAC80211_RC_PID 147 extern int rc80211_pid_init(void); 148 extern void rc80211_pid_exit(void); 149 #else 150 static inline int rc80211_pid_init(void) 151 { 152 return 0; 153 } 154 static inline void rc80211_pid_exit(void) 155 { 156 } 157 #endif 158 159 #ifdef CONFIG_MAC80211_RC_MINSTREL 160 extern int rc80211_minstrel_init(void); 161 extern void rc80211_minstrel_exit(void); 162 #else 163 static inline int rc80211_minstrel_init(void) 164 { 165 return 0; 166 } 167 static inline void rc80211_minstrel_exit(void) 168 { 169 } 170 #endif 171 172 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT 173 extern int rc80211_minstrel_ht_init(void); 174 extern void rc80211_minstrel_ht_exit(void); 175 #else 176 static inline int rc80211_minstrel_ht_init(void) 177 { 178 return 0; 179 } 180 static inline void rc80211_minstrel_ht_exit(void) 181 { 182 } 183 #endif 184 185 186 #endif /* IEEE80211_RATE_H */ 187