mac80211: rate control status only for controlled packets
[linux-2.6.git] / net / mac80211 / rate.h
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 */