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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 | ||
2e92e6f2 JB |
22 | /** |
23 | * struct rate_selection - rate selection for rate control algos | |
24 | * @rate: selected transmission rate index | |
25 | * @nonerp: Non-ERP rate to use instead if ERP cannot be used | |
26 | * @probe: rate for probing (or -1) | |
27 | * | |
28 | */ | |
1abbe498 | 29 | struct rate_selection { |
2e92e6f2 | 30 | s8 rate_idx, nonerp_idx, probe_idx; |
f0706e82 JB |
31 | }; |
32 | ||
f0706e82 JB |
33 | struct rate_control_ops { |
34 | struct module *module; | |
35 | const char *name; | |
36 | void (*tx_status)(void *priv, struct net_device *dev, | |
37 | struct sk_buff *skb, | |
38 | struct ieee80211_tx_status *status); | |
1abbe498 | 39 | void (*get_rate)(void *priv, struct net_device *dev, |
8318d78a JB |
40 | struct ieee80211_supported_band *band, |
41 | struct sk_buff *skb, | |
1abbe498 | 42 | struct rate_selection *sel); |
f0706e82 JB |
43 | void (*rate_init)(void *priv, void *priv_sta, |
44 | struct ieee80211_local *local, struct sta_info *sta); | |
45 | void (*clear)(void *priv); | |
46 | ||
47 | void *(*alloc)(struct ieee80211_local *local); | |
48 | void (*free)(void *priv); | |
49 | void *(*alloc_sta)(void *priv, gfp_t gfp); | |
50 | void (*free_sta)(void *priv, void *priv_sta); | |
51 | ||
52 | int (*add_attrs)(void *priv, struct kobject *kobj); | |
53 | void (*remove_attrs)(void *priv, struct kobject *kobj); | |
e9f207f0 JB |
54 | void (*add_sta_debugfs)(void *priv, void *priv_sta, |
55 | struct dentry *dir); | |
56 | void (*remove_sta_debugfs)(void *priv, void *priv_sta); | |
f0706e82 JB |
57 | }; |
58 | ||
59 | struct rate_control_ref { | |
60 | struct rate_control_ops *ops; | |
61 | void *priv; | |
62 | struct kref kref; | |
63 | }; | |
64 | ||
65 | int ieee80211_rate_control_register(struct rate_control_ops *ops); | |
66 | void ieee80211_rate_control_unregister(struct rate_control_ops *ops); | |
67 | ||
68 | /* Get a reference to the rate control algorithm. If `name' is NULL, get the | |
69 | * first available algorithm. */ | |
70 | struct rate_control_ref *rate_control_alloc(const char *name, | |
71 | struct ieee80211_local *local); | |
1abbe498 | 72 | void rate_control_get_rate(struct net_device *dev, |
8318d78a JB |
73 | struct ieee80211_supported_band *sband, |
74 | struct sk_buff *skb, | |
1abbe498 | 75 | struct rate_selection *sel); |
f0706e82 JB |
76 | struct rate_control_ref *rate_control_get(struct rate_control_ref *ref); |
77 | void rate_control_put(struct rate_control_ref *ref); | |
78 | ||
1abbe498 | 79 | static inline void rate_control_tx_status(struct net_device *dev, |
f0706e82 JB |
80 | struct sk_buff *skb, |
81 | struct ieee80211_tx_status *status) | |
82 | { | |
1abbe498 | 83 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
f0706e82 | 84 | struct rate_control_ref *ref = local->rate_ctrl; |
f0706e82 | 85 | |
1abbe498 | 86 | ref->ops->tx_status(ref->priv, dev, skb, status); |
f0706e82 JB |
87 | } |
88 | ||
89 | ||
90 | static inline void rate_control_rate_init(struct sta_info *sta, | |
91 | struct ieee80211_local *local) | |
92 | { | |
93 | struct rate_control_ref *ref = sta->rate_ctrl; | |
94 | ref->ops->rate_init(ref->priv, sta->rate_ctrl_priv, local, sta); | |
95 | } | |
96 | ||
97 | ||
98 | static inline void rate_control_clear(struct ieee80211_local *local) | |
99 | { | |
100 | struct rate_control_ref *ref = local->rate_ctrl; | |
101 | ref->ops->clear(ref->priv); | |
102 | } | |
103 | ||
104 | static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, | |
105 | gfp_t gfp) | |
106 | { | |
107 | return ref->ops->alloc_sta(ref->priv, gfp); | |
108 | } | |
109 | ||
110 | static inline void rate_control_free_sta(struct rate_control_ref *ref, | |
111 | void *priv) | |
112 | { | |
113 | ref->ops->free_sta(ref->priv, priv); | |
114 | } | |
115 | ||
e9f207f0 JB |
116 | static inline void rate_control_add_sta_debugfs(struct sta_info *sta) |
117 | { | |
118 | #ifdef CONFIG_MAC80211_DEBUGFS | |
119 | struct rate_control_ref *ref = sta->rate_ctrl; | |
120 | if (sta->debugfs.dir && ref->ops->add_sta_debugfs) | |
121 | ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv, | |
122 | sta->debugfs.dir); | |
123 | #endif | |
124 | } | |
125 | ||
126 | static inline void rate_control_remove_sta_debugfs(struct sta_info *sta) | |
127 | { | |
128 | #ifdef CONFIG_MAC80211_DEBUGFS | |
129 | struct rate_control_ref *ref = sta->rate_ctrl; | |
130 | if (ref->ops->remove_sta_debugfs) | |
131 | ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv); | |
132 | #endif | |
133 | } | |
134 | ||
8318d78a JB |
135 | static inline int rate_supported(struct sta_info *sta, |
136 | enum ieee80211_band band, | |
137 | int index) | |
1abbe498 | 138 | { |
8318d78a | 139 | return (sta == NULL || sta->supp_rates[band] & BIT(index)); |
1abbe498 MN |
140 | } |
141 | ||
2e92e6f2 | 142 | static inline s8 |
8318d78a JB |
143 | rate_lowest_index(struct ieee80211_local *local, |
144 | struct ieee80211_supported_band *sband, | |
1abbe498 MN |
145 | struct sta_info *sta) |
146 | { | |
147 | int i; | |
148 | ||
8318d78a JB |
149 | for (i = 0; i < sband->n_bitrates; i++) |
150 | if (rate_supported(sta, sband->band, i)) | |
1abbe498 | 151 | return i; |
1abbe498 MN |
152 | |
153 | /* warn when we cannot find a rate. */ | |
154 | WARN_ON(1); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
ff688089 JB |
159 | |
160 | /* functions for rate control related to a device */ | |
161 | int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, | |
162 | const char *name); | |
163 | void rate_control_deinitialize(struct ieee80211_local *local); | |
164 | ||
4b475898 JB |
165 | |
166 | /* Rate control algorithms */ | |
4b475898 JB |
167 | #if defined(RC80211_PID_COMPILE) || \ |
168 | (defined(CONFIG_MAC80211_RC_PID) && \ | |
169 | !defined(CONFIG_MAC80211_RC_PID_MODULE)) | |
170 | extern int rc80211_pid_init(void); | |
171 | extern void rc80211_pid_exit(void); | |
172 | #else | |
173 | static inline int rc80211_pid_init(void) | |
174 | { | |
175 | return 0; | |
176 | } | |
177 | static inline void rc80211_pid_exit(void) | |
178 | { | |
179 | } | |
180 | #endif | |
181 | ||
f0706e82 | 182 | #endif /* IEEE80211_RATE_H */ |