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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 | ||
21 | #define RATE_CONTROL_NUM_DOWN 20 | |
22 | #define RATE_CONTROL_NUM_UP 15 | |
23 | ||
24 | ||
25 | struct rate_control_extra { | |
26 | /* values from rate_control_get_rate() to the caller: */ | |
27 | struct ieee80211_rate *probe; /* probe with this rate, or NULL for no | |
28 | * probing */ | |
29 | struct ieee80211_rate *nonerp; | |
30 | ||
31 | /* parameters from the caller to rate_control_get_rate(): */ | |
32 | struct ieee80211_hw_mode *mode; | |
33 | int mgmt_data; /* this is data frame that is used for management | |
34 | * (e.g., IEEE 802.1X EAPOL) */ | |
35 | u16 ethertype; | |
36 | }; | |
37 | ||
38 | ||
39 | struct rate_control_ops { | |
40 | struct module *module; | |
41 | const char *name; | |
42 | void (*tx_status)(void *priv, struct net_device *dev, | |
43 | struct sk_buff *skb, | |
44 | struct ieee80211_tx_status *status); | |
45 | struct ieee80211_rate *(*get_rate)(void *priv, struct net_device *dev, | |
46 | struct sk_buff *skb, | |
47 | struct rate_control_extra *extra); | |
48 | void (*rate_init)(void *priv, void *priv_sta, | |
49 | struct ieee80211_local *local, struct sta_info *sta); | |
50 | void (*clear)(void *priv); | |
51 | ||
52 | void *(*alloc)(struct ieee80211_local *local); | |
53 | void (*free)(void *priv); | |
54 | void *(*alloc_sta)(void *priv, gfp_t gfp); | |
55 | void (*free_sta)(void *priv, void *priv_sta); | |
56 | ||
57 | int (*add_attrs)(void *priv, struct kobject *kobj); | |
58 | void (*remove_attrs)(void *priv, struct kobject *kobj); | |
59 | }; | |
60 | ||
61 | struct rate_control_ref { | |
62 | struct rate_control_ops *ops; | |
63 | void *priv; | |
64 | struct kref kref; | |
65 | }; | |
66 | ||
67 | int ieee80211_rate_control_register(struct rate_control_ops *ops); | |
68 | void ieee80211_rate_control_unregister(struct rate_control_ops *ops); | |
69 | ||
70 | /* Get a reference to the rate control algorithm. If `name' is NULL, get the | |
71 | * first available algorithm. */ | |
72 | struct rate_control_ref *rate_control_alloc(const char *name, | |
73 | struct ieee80211_local *local); | |
74 | struct rate_control_ref *rate_control_get(struct rate_control_ref *ref); | |
75 | void rate_control_put(struct rate_control_ref *ref); | |
76 | ||
77 | static inline void rate_control_tx_status(struct ieee80211_local *local, | |
78 | struct net_device *dev, | |
79 | struct sk_buff *skb, | |
80 | struct ieee80211_tx_status *status) | |
81 | { | |
82 | struct rate_control_ref *ref = local->rate_ctrl; | |
83 | ref->ops->tx_status(ref->priv, dev, skb, status); | |
84 | } | |
85 | ||
86 | ||
87 | static inline struct ieee80211_rate * | |
88 | rate_control_get_rate(struct ieee80211_local *local, struct net_device *dev, | |
89 | struct sk_buff *skb, struct rate_control_extra *extra) | |
90 | { | |
91 | struct rate_control_ref *ref = local->rate_ctrl; | |
92 | return ref->ops->get_rate(ref->priv, dev, skb, extra); | |
93 | } | |
94 | ||
95 | ||
96 | static inline void rate_control_rate_init(struct sta_info *sta, | |
97 | struct ieee80211_local *local) | |
98 | { | |
99 | struct rate_control_ref *ref = sta->rate_ctrl; | |
100 | ref->ops->rate_init(ref->priv, sta->rate_ctrl_priv, local, sta); | |
101 | } | |
102 | ||
103 | ||
104 | static inline void rate_control_clear(struct ieee80211_local *local) | |
105 | { | |
106 | struct rate_control_ref *ref = local->rate_ctrl; | |
107 | ref->ops->clear(ref->priv); | |
108 | } | |
109 | ||
110 | static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, | |
111 | gfp_t gfp) | |
112 | { | |
113 | return ref->ops->alloc_sta(ref->priv, gfp); | |
114 | } | |
115 | ||
116 | static inline void rate_control_free_sta(struct rate_control_ref *ref, | |
117 | void *priv) | |
118 | { | |
119 | ref->ops->free_sta(ref->priv, priv); | |
120 | } | |
121 | ||
122 | #endif /* IEEE80211_RATE_H */ |