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f0706e82 JB |
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> | |
d0709a65 | 17 | #include <linux/kref.h> |
f0706e82 JB |
18 | #include <net/mac80211.h> |
19 | #include "ieee80211_i.h" | |
20 | #include "sta_info.h" | |
21 | ||
8318d78a | 22 | /* TODO: kdoc */ |
1abbe498 MN |
23 | struct rate_selection { |
24 | /* Selected transmission rate */ | |
25 | struct ieee80211_rate *rate; | |
26 | /* Non-ERP rate to use if mac80211 decides it cannot use an ERP rate */ | |
f0706e82 | 27 | struct ieee80211_rate *nonerp; |
1abbe498 MN |
28 | /* probe with this rate, or NULL for no probing */ |
29 | struct ieee80211_rate *probe; | |
f0706e82 JB |
30 | }; |
31 | ||
f0706e82 JB |
32 | struct rate_control_ops { |
33 | struct module *module; | |
34 | const char *name; | |
35 | void (*tx_status)(void *priv, struct net_device *dev, | |
36 | struct sk_buff *skb, | |
37 | struct ieee80211_tx_status *status); | |
1abbe498 | 38 | void (*get_rate)(void *priv, struct net_device *dev, |
8318d78a JB |
39 | struct ieee80211_supported_band *band, |
40 | struct sk_buff *skb, | |
1abbe498 | 41 | struct rate_selection *sel); |
f0706e82 JB |
42 | void (*rate_init)(void *priv, void *priv_sta, |
43 | struct ieee80211_local *local, struct sta_info *sta); | |
44 | void (*clear)(void *priv); | |
45 | ||
46 | void *(*alloc)(struct ieee80211_local *local); | |
47 | void (*free)(void *priv); | |
48 | void *(*alloc_sta)(void *priv, gfp_t gfp); | |
49 | void (*free_sta)(void *priv, void *priv_sta); | |
50 | ||
51 | int (*add_attrs)(void *priv, struct kobject *kobj); | |
52 | void (*remove_attrs)(void *priv, struct kobject *kobj); | |
e9f207f0 JB |
53 | void (*add_sta_debugfs)(void *priv, void *priv_sta, |
54 | struct dentry *dir); | |
55 | void (*remove_sta_debugfs)(void *priv, void *priv_sta); | |
f0706e82 JB |
56 | }; |
57 | ||
58 | struct rate_control_ref { | |
59 | struct rate_control_ops *ops; | |
60 | void *priv; | |
61 | struct kref kref; | |
62 | }; | |
63 | ||
64 | int ieee80211_rate_control_register(struct rate_control_ops *ops); | |
65 | void ieee80211_rate_control_unregister(struct rate_control_ops *ops); | |
66 | ||
67 | /* Get a reference to the rate control algorithm. If `name' is NULL, get the | |
68 | * first available algorithm. */ | |
69 | struct rate_control_ref *rate_control_alloc(const char *name, | |
70 | struct ieee80211_local *local); | |
1abbe498 | 71 | void rate_control_get_rate(struct net_device *dev, |
8318d78a JB |
72 | struct ieee80211_supported_band *sband, |
73 | struct sk_buff *skb, | |
1abbe498 | 74 | struct rate_selection *sel); |
f0706e82 JB |
75 | struct rate_control_ref *rate_control_get(struct rate_control_ref *ref); |
76 | void rate_control_put(struct rate_control_ref *ref); | |
77 | ||
1abbe498 | 78 | static inline void rate_control_tx_status(struct net_device *dev, |
f0706e82 JB |
79 | struct sk_buff *skb, |
80 | struct ieee80211_tx_status *status) | |
81 | { | |
1abbe498 | 82 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
f0706e82 | 83 | struct rate_control_ref *ref = local->rate_ctrl; |
f0706e82 | 84 | |
1abbe498 | 85 | ref->ops->tx_status(ref->priv, dev, skb, status); |
f0706e82 JB |
86 | } |
87 | ||
88 | ||
89 | static inline void rate_control_rate_init(struct sta_info *sta, | |
90 | struct ieee80211_local *local) | |
91 | { | |
92 | struct rate_control_ref *ref = sta->rate_ctrl; | |
93 | ref->ops->rate_init(ref->priv, sta->rate_ctrl_priv, local, sta); | |
94 | } | |
95 | ||
96 | ||
97 | static inline void rate_control_clear(struct ieee80211_local *local) | |
98 | { | |
99 | struct rate_control_ref *ref = local->rate_ctrl; | |
100 | ref->ops->clear(ref->priv); | |
101 | } | |
102 | ||
103 | static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, | |
104 | gfp_t gfp) | |
105 | { | |
106 | return ref->ops->alloc_sta(ref->priv, gfp); | |
107 | } | |
108 | ||
109 | static inline void rate_control_free_sta(struct rate_control_ref *ref, | |
110 | void *priv) | |
111 | { | |
112 | ref->ops->free_sta(ref->priv, priv); | |
113 | } | |
114 | ||
e9f207f0 JB |
115 | static inline void rate_control_add_sta_debugfs(struct sta_info *sta) |
116 | { | |
117 | #ifdef CONFIG_MAC80211_DEBUGFS | |
118 | struct rate_control_ref *ref = sta->rate_ctrl; | |
119 | if (sta->debugfs.dir && ref->ops->add_sta_debugfs) | |
120 | ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv, | |
121 | sta->debugfs.dir); | |
122 | #endif | |
123 | } | |
124 | ||
125 | static inline void rate_control_remove_sta_debugfs(struct sta_info *sta) | |
126 | { | |
127 | #ifdef CONFIG_MAC80211_DEBUGFS | |
128 | struct rate_control_ref *ref = sta->rate_ctrl; | |
129 | if (ref->ops->remove_sta_debugfs) | |
130 | ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv); | |
131 | #endif | |
132 | } | |
133 | ||
8318d78a JB |
134 | static inline int rate_supported(struct sta_info *sta, |
135 | enum ieee80211_band band, | |
136 | int index) | |
1abbe498 | 137 | { |
8318d78a | 138 | return (sta == NULL || sta->supp_rates[band] & BIT(index)); |
1abbe498 MN |
139 | } |
140 | ||
141 | static inline int | |
8318d78a JB |
142 | rate_lowest_index(struct ieee80211_local *local, |
143 | struct ieee80211_supported_band *sband, | |
1abbe498 MN |
144 | struct sta_info *sta) |
145 | { | |
146 | int i; | |
147 | ||
8318d78a JB |
148 | for (i = 0; i < sband->n_bitrates; i++) |
149 | if (rate_supported(sta, sband->band, i)) | |
1abbe498 | 150 | return i; |
1abbe498 MN |
151 | |
152 | /* warn when we cannot find a rate. */ | |
153 | WARN_ON(1); | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
158 | static inline struct ieee80211_rate * | |
8318d78a JB |
159 | rate_lowest(struct ieee80211_local *local, |
160 | struct ieee80211_supported_band *sband, | |
1abbe498 MN |
161 | struct sta_info *sta) |
162 | { | |
8318d78a | 163 | return &sband->bitrates[rate_lowest_index(local, sband, sta)]; |
1abbe498 MN |
164 | } |
165 | ||
ff688089 JB |
166 | |
167 | /* functions for rate control related to a device */ | |
168 | int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, | |
169 | const char *name); | |
170 | void rate_control_deinitialize(struct ieee80211_local *local); | |
171 | ||
4b475898 JB |
172 | |
173 | /* Rate control algorithms */ | |
4b475898 JB |
174 | #if defined(RC80211_PID_COMPILE) || \ |
175 | (defined(CONFIG_MAC80211_RC_PID) && \ | |
176 | !defined(CONFIG_MAC80211_RC_PID_MODULE)) | |
177 | extern int rc80211_pid_init(void); | |
178 | extern void rc80211_pid_exit(void); | |
179 | #else | |
180 | static inline int rc80211_pid_init(void) | |
181 | { | |
182 | return 0; | |
183 | } | |
184 | static inline void rc80211_pid_exit(void) | |
185 | { | |
186 | } | |
187 | #endif | |
188 | ||
f0706e82 | 189 | #endif /* IEEE80211_RATE_H */ |