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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> | |
17 | #include <net/mac80211.h> | |
18 | #include "ieee80211_i.h" | |
19 | #include "sta_info.h" | |
20 | ||
8318d78a | 21 | /* TODO: kdoc */ |
1abbe498 MN |
22 | struct rate_selection { |
23 | /* Selected transmission rate */ | |
24 | struct ieee80211_rate *rate; | |
25 | /* Non-ERP rate to use if mac80211 decides it cannot use an ERP rate */ | |
f0706e82 | 26 | struct ieee80211_rate *nonerp; |
1abbe498 MN |
27 | /* probe with this rate, or NULL for no probing */ |
28 | struct ieee80211_rate *probe; | |
f0706e82 JB |
29 | }; |
30 | ||
f0706e82 JB |
31 | struct rate_control_ops { |
32 | struct module *module; | |
33 | const char *name; | |
34 | void (*tx_status)(void *priv, struct net_device *dev, | |
35 | struct sk_buff *skb, | |
36 | struct ieee80211_tx_status *status); | |
1abbe498 | 37 | void (*get_rate)(void *priv, struct net_device *dev, |
8318d78a JB |
38 | struct ieee80211_supported_band *band, |
39 | struct sk_buff *skb, | |
1abbe498 | 40 | struct rate_selection *sel); |
f0706e82 JB |
41 | void (*rate_init)(void *priv, void *priv_sta, |
42 | struct ieee80211_local *local, struct sta_info *sta); | |
43 | void (*clear)(void *priv); | |
44 | ||
45 | void *(*alloc)(struct ieee80211_local *local); | |
46 | void (*free)(void *priv); | |
47 | void *(*alloc_sta)(void *priv, gfp_t gfp); | |
48 | void (*free_sta)(void *priv, void *priv_sta); | |
49 | ||
50 | int (*add_attrs)(void *priv, struct kobject *kobj); | |
51 | void (*remove_attrs)(void *priv, struct kobject *kobj); | |
e9f207f0 JB |
52 | void (*add_sta_debugfs)(void *priv, void *priv_sta, |
53 | struct dentry *dir); | |
54 | void (*remove_sta_debugfs)(void *priv, void *priv_sta); | |
f0706e82 JB |
55 | }; |
56 | ||
57 | struct rate_control_ref { | |
58 | struct rate_control_ops *ops; | |
59 | void *priv; | |
60 | struct kref kref; | |
61 | }; | |
62 | ||
63 | int ieee80211_rate_control_register(struct rate_control_ops *ops); | |
64 | void ieee80211_rate_control_unregister(struct rate_control_ops *ops); | |
65 | ||
66 | /* Get a reference to the rate control algorithm. If `name' is NULL, get the | |
67 | * first available algorithm. */ | |
68 | struct rate_control_ref *rate_control_alloc(const char *name, | |
69 | struct ieee80211_local *local); | |
1abbe498 | 70 | void rate_control_get_rate(struct net_device *dev, |
8318d78a JB |
71 | struct ieee80211_supported_band *sband, |
72 | struct sk_buff *skb, | |
1abbe498 | 73 | struct rate_selection *sel); |
f0706e82 JB |
74 | struct rate_control_ref *rate_control_get(struct rate_control_ref *ref); |
75 | void rate_control_put(struct rate_control_ref *ref); | |
76 | ||
1abbe498 | 77 | static inline void rate_control_tx_status(struct net_device *dev, |
f0706e82 JB |
78 | struct sk_buff *skb, |
79 | struct ieee80211_tx_status *status) | |
80 | { | |
1abbe498 | 81 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
f0706e82 | 82 | struct rate_control_ref *ref = local->rate_ctrl; |
f0706e82 | 83 | |
1abbe498 | 84 | ref->ops->tx_status(ref->priv, dev, skb, status); |
f0706e82 JB |
85 | } |
86 | ||
87 | ||
88 | static inline void rate_control_rate_init(struct sta_info *sta, | |
89 | struct ieee80211_local *local) | |
90 | { | |
91 | struct rate_control_ref *ref = sta->rate_ctrl; | |
92 | ref->ops->rate_init(ref->priv, sta->rate_ctrl_priv, local, sta); | |
93 | } | |
94 | ||
95 | ||
96 | static inline void rate_control_clear(struct ieee80211_local *local) | |
97 | { | |
98 | struct rate_control_ref *ref = local->rate_ctrl; | |
99 | ref->ops->clear(ref->priv); | |
100 | } | |
101 | ||
102 | static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, | |
103 | gfp_t gfp) | |
104 | { | |
105 | return ref->ops->alloc_sta(ref->priv, gfp); | |
106 | } | |
107 | ||
108 | static inline void rate_control_free_sta(struct rate_control_ref *ref, | |
109 | void *priv) | |
110 | { | |
111 | ref->ops->free_sta(ref->priv, priv); | |
112 | } | |
113 | ||
e9f207f0 JB |
114 | static inline void rate_control_add_sta_debugfs(struct sta_info *sta) |
115 | { | |
116 | #ifdef CONFIG_MAC80211_DEBUGFS | |
117 | struct rate_control_ref *ref = sta->rate_ctrl; | |
118 | if (sta->debugfs.dir && ref->ops->add_sta_debugfs) | |
119 | ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv, | |
120 | sta->debugfs.dir); | |
121 | #endif | |
122 | } | |
123 | ||
124 | static inline void rate_control_remove_sta_debugfs(struct sta_info *sta) | |
125 | { | |
126 | #ifdef CONFIG_MAC80211_DEBUGFS | |
127 | struct rate_control_ref *ref = sta->rate_ctrl; | |
128 | if (ref->ops->remove_sta_debugfs) | |
129 | ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv); | |
130 | #endif | |
131 | } | |
132 | ||
8318d78a JB |
133 | static inline int rate_supported(struct sta_info *sta, |
134 | enum ieee80211_band band, | |
135 | int index) | |
1abbe498 | 136 | { |
8318d78a | 137 | return (sta == NULL || sta->supp_rates[band] & BIT(index)); |
1abbe498 MN |
138 | } |
139 | ||
140 | static inline int | |
8318d78a JB |
141 | rate_lowest_index(struct ieee80211_local *local, |
142 | struct ieee80211_supported_band *sband, | |
1abbe498 MN |
143 | struct sta_info *sta) |
144 | { | |
145 | int i; | |
146 | ||
8318d78a JB |
147 | for (i = 0; i < sband->n_bitrates; i++) |
148 | if (rate_supported(sta, sband->band, i)) | |
1abbe498 | 149 | return i; |
1abbe498 MN |
150 | |
151 | /* warn when we cannot find a rate. */ | |
152 | WARN_ON(1); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | static inline struct ieee80211_rate * | |
8318d78a JB |
158 | rate_lowest(struct ieee80211_local *local, |
159 | struct ieee80211_supported_band *sband, | |
1abbe498 MN |
160 | struct sta_info *sta) |
161 | { | |
8318d78a | 162 | return &sband->bitrates[rate_lowest_index(local, sband, sta)]; |
1abbe498 MN |
163 | } |
164 | ||
ff688089 JB |
165 | |
166 | /* functions for rate control related to a device */ | |
167 | int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, | |
168 | const char *name); | |
169 | void rate_control_deinitialize(struct ieee80211_local *local); | |
170 | ||
4b475898 JB |
171 | |
172 | /* Rate control algorithms */ | |
173 | #if defined(RC80211_SIMPLE_COMPILE) || \ | |
174 | (defined(CONFIG_MAC80211_RC_SIMPLE) && \ | |
175 | !defined(CONFIG_MAC80211_RC_SIMPLE_MODULE)) | |
176 | extern int rc80211_simple_init(void); | |
177 | extern void rc80211_simple_exit(void); | |
178 | #else | |
179 | static inline int rc80211_simple_init(void) | |
180 | { | |
181 | return 0; | |
182 | } | |
183 | static inline void rc80211_simple_exit(void) | |
184 | { | |
185 | } | |
186 | #endif | |
187 | ||
188 | #if defined(RC80211_PID_COMPILE) || \ | |
189 | (defined(CONFIG_MAC80211_RC_PID) && \ | |
190 | !defined(CONFIG_MAC80211_RC_PID_MODULE)) | |
191 | extern int rc80211_pid_init(void); | |
192 | extern void rc80211_pid_exit(void); | |
193 | #else | |
194 | static inline int rc80211_pid_init(void) | |
195 | { | |
196 | return 0; | |
197 | } | |
198 | static inline void rc80211_pid_exit(void) | |
199 | { | |
200 | } | |
201 | #endif | |
202 | ||
f0706e82 | 203 | #endif /* IEEE80211_RATE_H */ |