Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[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 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
30                            struct sta_info *sta,
31                            struct ieee80211_tx_rate_control *txrc);
32 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
33 void rate_control_put(struct rate_control_ref *ref);
34
35 static inline void rate_control_tx_status(struct ieee80211_local *local,
36                                           struct ieee80211_supported_band *sband,
37                                           struct sta_info *sta,
38                                           struct sk_buff *skb)
39 {
40         struct rate_control_ref *ref = local->rate_ctrl;
41         struct ieee80211_sta *ista = &sta->sta;
42         void *priv_sta = sta->rate_ctrl_priv;
43
44         if (!ref)
45                 return;
46
47         ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
48 }
49
50
51 static inline void rate_control_rate_init(struct sta_info *sta)
52 {
53         struct ieee80211_local *local = sta->sdata->local;
54         struct rate_control_ref *ref = sta->rate_ctrl;
55         struct ieee80211_sta *ista = &sta->sta;
56         void *priv_sta = sta->rate_ctrl_priv;
57         struct ieee80211_supported_band *sband;
58
59         if (!ref)
60                 return;
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                                     enum nl80211_channel_type oper_chan_type)
71 {
72         struct rate_control_ref *ref = local->rate_ctrl;
73         struct ieee80211_sta *ista = &sta->sta;
74         void *priv_sta = sta->rate_ctrl_priv;
75
76         if (ref && ref->ops->rate_update)
77                 ref->ops->rate_update(ref->priv, sband, ista,
78                                       priv_sta, changed, oper_chan_type);
79 }
80
81 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
82                                            struct ieee80211_sta *sta,
83                                            gfp_t gfp)
84 {
85         return ref->ops->alloc_sta(ref->priv, sta, gfp);
86 }
87
88 static inline void rate_control_free_sta(struct sta_info *sta)
89 {
90         struct rate_control_ref *ref = sta->rate_ctrl;
91         struct ieee80211_sta *ista = &sta->sta;
92         void *priv_sta = sta->rate_ctrl_priv;
93
94         ref->ops->free_sta(ref->priv, ista, priv_sta);
95 }
96
97 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
98 {
99 #ifdef CONFIG_MAC80211_DEBUGFS
100         struct rate_control_ref *ref = sta->rate_ctrl;
101         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
102                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
103                                           sta->debugfs.dir);
104 #endif
105 }
106
107 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
108 {
109 #ifdef CONFIG_MAC80211_DEBUGFS
110         struct rate_control_ref *ref = sta->rate_ctrl;
111         if (ref && ref->ops->remove_sta_debugfs)
112                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
113 #endif
114 }
115
116 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
117  * first available algorithm. */
118 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
119                                  const char *name);
120 void rate_control_deinitialize(struct ieee80211_local *local);
121
122
123 /* Rate control algorithms */
124 #ifdef CONFIG_MAC80211_RC_PID
125 extern int rc80211_pid_init(void);
126 extern void rc80211_pid_exit(void);
127 #else
128 static inline int rc80211_pid_init(void)
129 {
130         return 0;
131 }
132 static inline void rc80211_pid_exit(void)
133 {
134 }
135 #endif
136
137 #ifdef CONFIG_MAC80211_RC_MINSTREL
138 extern int rc80211_minstrel_init(void);
139 extern void rc80211_minstrel_exit(void);
140 #else
141 static inline int rc80211_minstrel_init(void)
142 {
143         return 0;
144 }
145 static inline void rc80211_minstrel_exit(void)
146 {
147 }
148 #endif
149
150
151 #endif /* IEEE80211_RATE_H */