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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 	const 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 
rate_control_tx_status(struct ieee80211_local * local,struct ieee80211_supported_band * sband,struct sta_info * sta,struct sk_buff * skb)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 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
41 
42 	if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
43 		return;
44 
45 	spin_lock_bh(&sta->rate_ctrl_lock);
46 	if (ref->ops->tx_status)
47 		ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
48 	else
49 		ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
50 	spin_unlock_bh(&sta->rate_ctrl_lock);
51 }
52 
53 static inline void
rate_control_tx_status_noskb(struct ieee80211_local * local,struct ieee80211_supported_band * sband,struct sta_info * sta,struct ieee80211_tx_info * info)54 rate_control_tx_status_noskb(struct ieee80211_local *local,
55 			     struct ieee80211_supported_band *sband,
56 			     struct sta_info *sta,
57 			     struct ieee80211_tx_info *info)
58 {
59 	struct rate_control_ref *ref = local->rate_ctrl;
60 	struct ieee80211_sta *ista = &sta->sta;
61 	void *priv_sta = sta->rate_ctrl_priv;
62 
63 	if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
64 		return;
65 
66 	if (WARN_ON_ONCE(!ref->ops->tx_status_noskb))
67 		return;
68 
69 	spin_lock_bh(&sta->rate_ctrl_lock);
70 	ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
71 	spin_unlock_bh(&sta->rate_ctrl_lock);
72 }
73 
74 void rate_control_rate_init(struct sta_info *sta);
75 void rate_control_rate_update(struct ieee80211_local *local,
76 				    struct ieee80211_supported_band *sband,
77 				    struct sta_info *sta, u32 changed);
78 
rate_control_alloc_sta(struct rate_control_ref * ref,struct sta_info * sta,gfp_t gfp)79 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
80 					   struct sta_info *sta, gfp_t gfp)
81 {
82 	spin_lock_init(&sta->rate_ctrl_lock);
83 	return ref->ops->alloc_sta(ref->priv, &sta->sta, gfp);
84 }
85 
rate_control_free_sta(struct sta_info * sta)86 static inline void rate_control_free_sta(struct sta_info *sta)
87 {
88 	struct rate_control_ref *ref = sta->rate_ctrl;
89 	struct ieee80211_sta *ista = &sta->sta;
90 	void *priv_sta = sta->rate_ctrl_priv;
91 
92 	ref->ops->free_sta(ref->priv, ista, priv_sta);
93 }
94 
rate_control_add_sta_debugfs(struct sta_info * sta)95 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
96 {
97 #ifdef CONFIG_MAC80211_DEBUGFS
98 	struct rate_control_ref *ref = sta->rate_ctrl;
99 	if (ref && sta->debugfs_dir && ref->ops->add_sta_debugfs)
100 		ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
101 					  sta->debugfs_dir);
102 #endif
103 }
104 
rate_control_remove_sta_debugfs(struct sta_info * sta)105 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
106 {
107 #ifdef CONFIG_MAC80211_DEBUGFS
108 	struct rate_control_ref *ref = sta->rate_ctrl;
109 	if (ref && ref->ops->remove_sta_debugfs)
110 		ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
111 #endif
112 }
113 
114 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
115  * first available algorithm. */
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_MINSTREL
123 int rc80211_minstrel_init(void);
124 void rc80211_minstrel_exit(void);
125 #else
rc80211_minstrel_init(void)126 static inline int rc80211_minstrel_init(void)
127 {
128 	return 0;
129 }
rc80211_minstrel_exit(void)130 static inline void rc80211_minstrel_exit(void)
131 {
132 }
133 #endif
134 
135 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
136 int rc80211_minstrel_ht_init(void);
137 void rc80211_minstrel_ht_exit(void);
138 #else
rc80211_minstrel_ht_init(void)139 static inline int rc80211_minstrel_ht_init(void)
140 {
141 	return 0;
142 }
rc80211_minstrel_ht_exit(void)143 static inline void rc80211_minstrel_ht_exit(void)
144 {
145 }
146 #endif
147 
148 
149 #endif /* IEEE80211_RATE_H */
150