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Jiri Bencf0706e822007-05-05 11:45:53 -07001/*
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>
Johannes Bergd0709a62008-02-25 16:27:46 +010017#include <linux/kref.h>
Jiri Bencf0706e822007-05-05 11:45:53 -070018#include <net/mac80211.h>
19#include "ieee80211_i.h"
20#include "sta_info.h"
21
Jiri Bencf0706e822007-05-05 11:45:53 -070022struct rate_control_ref {
Johannes Berg4b7679a2008-09-18 18:14:18 +020023 struct ieee80211_local *local;
Jiri Bencf0706e822007-05-05 11:45:53 -070024 struct rate_control_ops *ops;
25 void *priv;
26 struct kref kref;
27};
28
Jiri Bencf0706e822007-05-05 11:45:53 -070029/* Get a reference to the rate control algorithm. If `name' is NULL, get the
30 * first available algorithm. */
31struct rate_control_ref *rate_control_alloc(const char *name,
32 struct ieee80211_local *local);
Johannes Berg4b7679a2008-09-18 18:14:18 +020033void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
Johannes Berge6a98542008-10-21 12:40:02 +020034 struct sta_info *sta,
35 struct ieee80211_tx_rate_control *txrc);
Jiri Bencf0706e822007-05-05 11:45:53 -070036struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
37void rate_control_put(struct rate_control_ref *ref);
38
Johannes Berg4b7679a2008-09-18 18:14:18 +020039static inline void rate_control_tx_status(struct ieee80211_local *local,
40 struct ieee80211_supported_band *sband,
41 struct sta_info *sta,
Johannes Berge039fa42008-05-15 12:55:29 +020042 struct sk_buff *skb)
Jiri Bencf0706e822007-05-05 11:45:53 -070043{
44 struct rate_control_ref *ref = local->rate_ctrl;
Johannes Berg4b7679a2008-09-18 18:14:18 +020045 struct ieee80211_sta *ista = &sta->sta;
46 void *priv_sta = sta->rate_ctrl_priv;
Johannes Berg2b874e82009-03-23 14:10:22 +010047 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Mattias Nissler1abbe492007-12-20 13:50:07 +010048
Johannes Berg2b874e82009-03-23 14:10:22 +010049 if (likely(info->flags & IEEE80211_TX_INTFL_RCALGO))
50 ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
Jiri Bencf0706e822007-05-05 11:45:53 -070051}
52
53
Johannes Berg4b7679a2008-09-18 18:14:18 +020054static inline void rate_control_rate_init(struct sta_info *sta)
Jiri Bencf0706e822007-05-05 11:45:53 -070055{
Johannes Berg4b7679a2008-09-18 18:14:18 +020056 struct ieee80211_local *local = sta->sdata->local;
Jiri Bencf0706e822007-05-05 11:45:53 -070057 struct rate_control_ref *ref = sta->rate_ctrl;
Johannes Berg4b7679a2008-09-18 18:14:18 +020058 struct ieee80211_sta *ista = &sta->sta;
59 void *priv_sta = sta->rate_ctrl_priv;
60 struct ieee80211_supported_band *sband;
61
Johannes Bergaf65cd92009-11-17 18:18:36 +010062 if (!ref)
63 return;
64
Johannes Berg4b7679a2008-09-18 18:14:18 +020065 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
66
67 ref->ops->rate_init(ref->priv, sband, ista, priv_sta);
Jiri Bencf0706e822007-05-05 11:45:53 -070068}
69
Sujith81cb7622009-02-12 11:38:37 +053070static inline void rate_control_rate_update(struct ieee80211_local *local,
71 struct ieee80211_supported_band *sband,
72 struct sta_info *sta, u32 changed)
73{
74 struct rate_control_ref *ref = local->rate_ctrl;
75 struct ieee80211_sta *ista = &sta->sta;
76 void *priv_sta = sta->rate_ctrl_priv;
77
Johannes Bergaf65cd92009-11-17 18:18:36 +010078 if (ref && ref->ops->rate_update)
Sujith81cb7622009-02-12 11:38:37 +053079 ref->ops->rate_update(ref->priv, sband, ista,
80 priv_sta, changed);
81}
Jiri Bencf0706e822007-05-05 11:45:53 -070082
Jiri Bencf0706e822007-05-05 11:45:53 -070083static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
Johannes Berg4b7679a2008-09-18 18:14:18 +020084 struct ieee80211_sta *sta,
Jiri Bencf0706e822007-05-05 11:45:53 -070085 gfp_t gfp)
86{
Johannes Berg4b7679a2008-09-18 18:14:18 +020087 return ref->ops->alloc_sta(ref->priv, sta, gfp);
Jiri Bencf0706e822007-05-05 11:45:53 -070088}
89
Johannes Berg4b7679a2008-09-18 18:14:18 +020090static inline void rate_control_free_sta(struct sta_info *sta)
Jiri Bencf0706e822007-05-05 11:45:53 -070091{
Johannes Berg4b7679a2008-09-18 18:14:18 +020092 struct rate_control_ref *ref = sta->rate_ctrl;
93 struct ieee80211_sta *ista = &sta->sta;
94 void *priv_sta = sta->rate_ctrl_priv;
95
96 ref->ops->free_sta(ref->priv, ista, priv_sta);
Jiri Bencf0706e822007-05-05 11:45:53 -070097}
98
Jiri Bence9f207f2007-05-05 11:46:38 -070099static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
100{
101#ifdef CONFIG_MAC80211_DEBUGFS
102 struct rate_control_ref *ref = sta->rate_ctrl;
Johannes Bergaf65cd92009-11-17 18:18:36 +0100103 if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
Jiri Bence9f207f2007-05-05 11:46:38 -0700104 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
105 sta->debugfs.dir);
106#endif
107}
108
109static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
110{
111#ifdef CONFIG_MAC80211_DEBUGFS
112 struct rate_control_ref *ref = sta->rate_ctrl;
Johannes Bergaf65cd92009-11-17 18:18:36 +0100113 if (ref && ref->ops->remove_sta_debugfs)
Jiri Bence9f207f2007-05-05 11:46:38 -0700114 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
115#endif
116}
117
Johannes Bergff688082007-07-27 15:43:23 +0200118/* functions for rate control related to a device */
119int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
120 const char *name);
121void rate_control_deinitialize(struct ieee80211_local *local);
122
Johannes Berg4b475892008-01-02 15:17:03 +0100123
124/* Rate control algorithms */
Adrian Bunke5f5e732008-06-26 13:38:13 +0300125#ifdef CONFIG_MAC80211_RC_PID
Johannes Berg4b475892008-01-02 15:17:03 +0100126extern int rc80211_pid_init(void);
127extern void rc80211_pid_exit(void);
128#else
129static inline int rc80211_pid_init(void)
130{
131 return 0;
132}
133static inline void rc80211_pid_exit(void)
134{
135}
136#endif
137
Felix Fietkaucccf1292008-10-05 18:07:45 +0200138#ifdef CONFIG_MAC80211_RC_MINSTREL
139extern int rc80211_minstrel_init(void);
140extern void rc80211_minstrel_exit(void);
141#else
142static inline int rc80211_minstrel_init(void)
143{
144 return 0;
145}
146static inline void rc80211_minstrel_exit(void)
147{
148}
149#endif
150
151
Jiri Bencf0706e822007-05-05 11:45:53 -0700152#endif /* IEEE80211_RATE_H */