xref: /openbmc/linux/net/mac80211/rate.h (revision 6774def6)
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 #include "driver-ops.h"
21 
22 struct rate_control_ref {
23 	struct ieee80211_local *local;
24 	const struct rate_control_ops *ops;
25 	void *priv;
26 };
27 
28 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
29 			   struct sta_info *sta,
30 			   struct ieee80211_tx_rate_control *txrc);
31 
32 static inline void rate_control_tx_status(struct ieee80211_local *local,
33 					  struct ieee80211_supported_band *sband,
34 					  struct sta_info *sta,
35 					  struct sk_buff *skb)
36 {
37 	struct rate_control_ref *ref = local->rate_ctrl;
38 	struct ieee80211_sta *ista = &sta->sta;
39 	void *priv_sta = sta->rate_ctrl_priv;
40 
41 	if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
42 		return;
43 
44 	ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
45 }
46 
47 
48 static inline void rate_control_rate_init(struct sta_info *sta)
49 {
50 	struct ieee80211_local *local = sta->sdata->local;
51 	struct rate_control_ref *ref = sta->rate_ctrl;
52 	struct ieee80211_sta *ista = &sta->sta;
53 	void *priv_sta = sta->rate_ctrl_priv;
54 	struct ieee80211_supported_band *sband;
55 	struct ieee80211_chanctx_conf *chanctx_conf;
56 
57 	ieee80211_sta_set_rx_nss(sta);
58 
59 	if (!ref)
60 		return;
61 
62 	rcu_read_lock();
63 
64 	chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
65 	if (WARN_ON(!chanctx_conf)) {
66 		rcu_read_unlock();
67 		return;
68 	}
69 
70 	sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
71 
72 	ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista,
73 			    priv_sta);
74 	rcu_read_unlock();
75 	set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
76 }
77 
78 static inline void rate_control_rate_update(struct ieee80211_local *local,
79 				    struct ieee80211_supported_band *sband,
80 				    struct sta_info *sta, u32 changed)
81 {
82 	struct rate_control_ref *ref = local->rate_ctrl;
83 	struct ieee80211_sta *ista = &sta->sta;
84 	void *priv_sta = sta->rate_ctrl_priv;
85 	struct ieee80211_chanctx_conf *chanctx_conf;
86 
87 	if (ref && ref->ops->rate_update) {
88 		rcu_read_lock();
89 
90 		chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
91 		if (WARN_ON(!chanctx_conf)) {
92 			rcu_read_unlock();
93 			return;
94 		}
95 
96 		ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def,
97 				      ista, priv_sta, changed);
98 		rcu_read_unlock();
99 	}
100 	drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
101 }
102 
103 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
104 					   struct ieee80211_sta *sta,
105 					   gfp_t gfp)
106 {
107 	return ref->ops->alloc_sta(ref->priv, sta, gfp);
108 }
109 
110 static inline void rate_control_free_sta(struct sta_info *sta)
111 {
112 	struct rate_control_ref *ref = sta->rate_ctrl;
113 	struct ieee80211_sta *ista = &sta->sta;
114 	void *priv_sta = sta->rate_ctrl_priv;
115 
116 	ref->ops->free_sta(ref->priv, ista, priv_sta);
117 }
118 
119 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
120 {
121 #ifdef CONFIG_MAC80211_DEBUGFS
122 	struct rate_control_ref *ref = sta->rate_ctrl;
123 	if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
124 		ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
125 					  sta->debugfs.dir);
126 #endif
127 }
128 
129 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
130 {
131 #ifdef CONFIG_MAC80211_DEBUGFS
132 	struct rate_control_ref *ref = sta->rate_ctrl;
133 	if (ref && ref->ops->remove_sta_debugfs)
134 		ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
135 #endif
136 }
137 
138 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
139  * first available algorithm. */
140 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
141 				 const char *name);
142 void rate_control_deinitialize(struct ieee80211_local *local);
143 
144 
145 /* Rate control algorithms */
146 #ifdef CONFIG_MAC80211_RC_MINSTREL
147 int rc80211_minstrel_init(void);
148 void rc80211_minstrel_exit(void);
149 #else
150 static inline int rc80211_minstrel_init(void)
151 {
152 	return 0;
153 }
154 static inline void rc80211_minstrel_exit(void)
155 {
156 }
157 #endif
158 
159 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
160 int rc80211_minstrel_ht_init(void);
161 void rc80211_minstrel_ht_exit(void);
162 #else
163 static inline int rc80211_minstrel_ht_init(void)
164 {
165 	return 0;
166 }
167 static inline void rc80211_minstrel_ht_exit(void)
168 {
169 }
170 #endif
171 
172 
173 #endif /* IEEE80211_RATE_H */
174