998cf7a935b66f80b01600816fb81205d97759ea
[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
48         if (!ref)
49                 return;
50
51         ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
52 }
53
54
55 static inline void rate_control_rate_init(struct sta_info *sta)
56 {
57         struct ieee80211_local *local = sta->sdata->local;
58         struct rate_control_ref *ref = sta->rate_ctrl;
59         struct ieee80211_sta *ista = &sta->sta;
60         void *priv_sta = sta->rate_ctrl_priv;
61         struct ieee80211_supported_band *sband;
62
63         if (!ref)
64                 return;
65
66         sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
67
68         ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
69 }
70
71 static inline void rate_control_rate_update(struct ieee80211_local *local,
72                                     struct ieee80211_supported_band *sband,
73                                     struct sta_info *sta, u32 changed)
74 {
75         struct rate_control_ref *ref = local->rate_ctrl;
76         struct ieee80211_sta *ista = &sta->sta;
77         void *priv_sta = sta->rate_ctrl_priv;
78
79         if (ref && ref->ops->rate_update)
80                 ref->ops->rate_update(ref->priv, sband, ista,
81                                       priv_sta, changed);
82 }
83
84 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
85                                            struct ieee80211_sta *sta,
86                                            gfp_t gfp)
87 {
88         return ref->ops->alloc_sta(ref->priv, sta, gfp);
89 }
90
91 static inline void rate_control_free_sta(struct sta_info *sta)
92 {
93         struct rate_control_ref *ref = sta->rate_ctrl;
94         struct ieee80211_sta *ista = &sta->sta;
95         void *priv_sta = sta->rate_ctrl_priv;
96
97         ref->ops->free_sta(ref->priv, ista, priv_sta);
98 }
99
100 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
101 {
102 #ifdef CONFIG_MAC80211_DEBUGFS
103         struct rate_control_ref *ref = sta->rate_ctrl;
104         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
105                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
106                                           sta->debugfs.dir);
107 #endif
108 }
109
110 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
111 {
112 #ifdef CONFIG_MAC80211_DEBUGFS
113         struct rate_control_ref *ref = sta->rate_ctrl;
114         if (ref && ref->ops->remove_sta_debugfs)
115                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
116 #endif
117 }
118
119 /* functions for rate control related to a device */
120 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
121                                  const char *name);
122 void rate_control_deinitialize(struct ieee80211_local *local);
123
124
125 /* Rate control algorithms */
126 #ifdef CONFIG_MAC80211_RC_PID
127 extern int rc80211_pid_init(void);
128 extern void rc80211_pid_exit(void);
129 #else
130 static inline int rc80211_pid_init(void)
131 {
132         return 0;
133 }
134 static inline void rc80211_pid_exit(void)
135 {
136 }
137 #endif
138
139 #ifdef CONFIG_MAC80211_RC_MINSTREL
140 extern int rc80211_minstrel_init(void);
141 extern void rc80211_minstrel_exit(void);
142 #else
143 static inline int rc80211_minstrel_init(void)
144 {
145         return 0;
146 }
147 static inline void rc80211_minstrel_exit(void)
148 {
149 }
150 #endif
151
152
153 #endif /* IEEE80211_RATE_H */