diff options
Diffstat (limited to 'net/mac80211/rate.h')
| -rw-r--r-- | net/mac80211/rate.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/net/mac80211/rate.h b/net/mac80211/rate.h new file mode 100644 index 000000000000..5b45f33cb766 --- /dev/null +++ b/net/mac80211/rate.h @@ -0,0 +1,189 @@ +/* + * Copyright 2002-2005, Instant802 Networks, Inc. + * Copyright 2005, Devicescape Software, Inc. + * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef IEEE80211_RATE_H +#define IEEE80211_RATE_H + +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/types.h> +#include <linux/kref.h> +#include <net/mac80211.h> +#include "ieee80211_i.h" +#include "sta_info.h" + +/* TODO: kdoc */ +struct rate_selection { + /* Selected transmission rate */ + struct ieee80211_rate *rate; + /* Non-ERP rate to use if mac80211 decides it cannot use an ERP rate */ + struct ieee80211_rate *nonerp; + /* probe with this rate, or NULL for no probing */ + struct ieee80211_rate *probe; +}; + +struct rate_control_ops { + struct module *module; + const char *name; + void (*tx_status)(void *priv, struct net_device *dev, + struct sk_buff *skb, + struct ieee80211_tx_status *status); + void (*get_rate)(void *priv, struct net_device *dev, + struct ieee80211_supported_band *band, + struct sk_buff *skb, + struct rate_selection *sel); + void (*rate_init)(void *priv, void *priv_sta, + struct ieee80211_local *local, struct sta_info *sta); + void (*clear)(void *priv); + + void *(*alloc)(struct ieee80211_local *local); + void (*free)(void *priv); + void *(*alloc_sta)(void *priv, gfp_t gfp); + void (*free_sta)(void *priv, void *priv_sta); + + int (*add_attrs)(void *priv, struct kobject *kobj); + void (*remove_attrs)(void *priv, struct kobject *kobj); + void (*add_sta_debugfs)(void *priv, void *priv_sta, + struct dentry *dir); + void (*remove_sta_debugfs)(void *priv, void *priv_sta); +}; + +struct rate_control_ref { + struct rate_control_ops *ops; + void *priv; + struct kref kref; +}; + +int ieee80211_rate_control_register(struct rate_control_ops *ops); +void ieee80211_rate_control_unregister(struct rate_control_ops *ops); + +/* Get a reference to the rate control algorithm. If `name' is NULL, get the + * first available algorithm. */ +struct rate_control_ref *rate_control_alloc(const char *name, + struct ieee80211_local *local); +void rate_control_get_rate(struct net_device *dev, + struct ieee80211_supported_band *sband, + struct sk_buff *skb, + struct rate_selection *sel); +struct rate_control_ref *rate_control_get(struct rate_control_ref *ref); +void rate_control_put(struct rate_control_ref *ref); + +static inline void rate_control_tx_status(struct net_device *dev, + struct sk_buff *skb, + struct ieee80211_tx_status *status) +{ + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct rate_control_ref *ref = local->rate_ctrl; + + ref->ops->tx_status(ref->priv, dev, skb, status); +} + + +static inline void rate_control_rate_init(struct sta_info *sta, + struct ieee80211_local *local) +{ + struct rate_control_ref *ref = sta->rate_ctrl; + ref->ops->rate_init(ref->priv, sta->rate_ctrl_priv, local, sta); +} + + +static inline void rate_control_clear(struct ieee80211_local *local) +{ + struct rate_control_ref *ref = local->rate_ctrl; + ref->ops->clear(ref->priv); +} + +static inline void *rate_control_alloc_sta(struct rate_control_ref *ref, + gfp_t gfp) +{ + return ref->ops->alloc_sta(ref->priv, gfp); +} + +static inline void rate_control_free_sta(struct rate_control_ref *ref, + void *priv) +{ + ref->ops->free_sta(ref->priv, priv); +} + +static inline void rate_control_add_sta_debugfs(struct sta_info *sta) +{ +#ifdef CONFIG_MAC80211_DEBUGFS + struct rate_control_ref *ref = sta->rate_ctrl; + if (sta->debugfs.dir && ref->ops->add_sta_debugfs) + ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv, + sta->debugfs.dir); +#endif +} + +static inline void rate_control_remove_sta_debugfs(struct sta_info *sta) +{ +#ifdef CONFIG_MAC80211_DEBUGFS + struct rate_control_ref *ref = sta->rate_ctrl; + if (ref->ops->remove_sta_debugfs) + ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv); +#endif +} + +static inline int rate_supported(struct sta_info *sta, + enum ieee80211_band band, + int index) +{ + return (sta == NULL || sta->supp_rates[band] & BIT(index)); +} + +static inline int +rate_lowest_index(struct ieee80211_local *local, + struct ieee80211_supported_band *sband, + struct sta_info *sta) +{ + int i; + + for (i = 0; i < sband->n_bitrates; i++) + if (rate_supported(sta, sband->band, i)) + return i; + + /* warn when we cannot find a rate. */ + WARN_ON(1); + + return 0; +} + +static inline struct ieee80211_rate * +rate_lowest(struct ieee80211_local *local, + struct ieee80211_supported_band *sband, + struct sta_info *sta) +{ + return &sband->bitrates[rate_lowest_index(local, sband, sta)]; +} + + +/* functions for rate control related to a device */ +int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, + const char *name); +void rate_control_deinitialize(struct ieee80211_local *local); + + +/* Rate control algorithms */ +#if defined(RC80211_PID_COMPILE) || \ + (defined(CONFIG_MAC80211_RC_PID) && \ + !defined(CONFIG_MAC80211_RC_PID_MODULE)) +extern int rc80211_pid_init(void); +extern void rc80211_pid_exit(void); +#else +static inline int rc80211_pid_init(void) +{ + return 0; +} +static inline void rc80211_pid_exit(void) +{ +} +#endif + +#endif /* IEEE80211_RATE_H */ |