diff options
Diffstat (limited to 'include/net/mac80211.h')
| -rw-r--r-- | include/net/mac80211.h | 133 |
1 files changed, 108 insertions, 25 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index c06104476973..e2fb5767e1fa 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -73,6 +73,21 @@ */ /** + * DOC: mac80211 workqueue + * + * mac80211 provides its own workqueue for drivers and internal mac80211 use. + * The workqueue is a single threaded workqueue and can only be accessed by + * helpers for sanity checking. Drivers must ensure all work added onto the + * mac80211 workqueue should be cancelled on the driver stop() callback. + * + * mac80211 will flushed the workqueue upon interface removal and during + * suspend. + * + * All work performed on the mac80211 workqueue must not acquire the RTNL lock. + * + */ + +/** * enum ieee80211_max_queues - maximum number of queues * * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. @@ -241,6 +256,11 @@ struct ieee80211_bss_conf { * it can be sent out. * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, * used to indicate that a frame was already retried due to PS + * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, + * used to indicate frame should not be encrypted + * @IEEE80211_TX_CTL_PSPOLL_RESPONSE: (internal?) + * This frame is a response to a PS-poll frame and should be sent + * although the station is in powersave mode. */ enum mac80211_tx_control_flags { IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), @@ -259,6 +279,8 @@ enum mac80211_tx_control_flags { IEEE80211_TX_INTFL_RCALGO = BIT(13), IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), IEEE80211_TX_INTFL_RETRIED = BIT(15), + IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), + IEEE80211_TX_CTL_PSPOLL_RESPONSE = BIT(17), }; /** @@ -397,6 +419,11 @@ static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) return (struct ieee80211_tx_info *)skb->cb; } +static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) +{ + return (struct ieee80211_rx_status *)skb->cb; +} + /** * ieee80211_tx_info_clear_status - clear TX status * @@ -478,7 +505,7 @@ enum mac80211_rx_flags { * * The low-level driver should provide this information (the subset * supported by hardware) to the 802.11 code with each received - * frame. + * frame, in the skb's control buffer (cb). * * @mactime: value in microseconds of the 64-bit Time Synchronization Function * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. @@ -901,12 +928,6 @@ enum ieee80211_hw_flags { * * @conf: &struct ieee80211_conf, device configuration, don't use. * - * @workqueue: single threaded workqueue available for driver use, - * allocated by mac80211 on registration and flushed when an - * interface is removed. - * NOTICE: All work performed on this workqueue must not - * acquire the RTNL lock. - * * @priv: pointer to private area that was allocated for driver use * along with this structure. * @@ -942,7 +963,6 @@ enum ieee80211_hw_flags { struct ieee80211_hw { struct ieee80211_conf conf; struct wiphy *wiphy; - struct workqueue_struct *workqueue; const char *rate_control_algorithm; void *priv; u32 flags; @@ -1224,10 +1244,13 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, * mac80211 needs to do and the amount of CPU wakeups, so you should * honour this flag if possible. * - * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then - * only those addressed to this station + * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS + * is not set then only those addressed to this station. * * @FIF_OTHER_BSS: pass frames destined to other BSSes + * + * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only + * those addressed to this station. */ enum ieee80211_filter_flags { FIF_PROMISC_IN_BSS = 1<<0, @@ -1237,6 +1260,7 @@ enum ieee80211_filter_flags { FIF_BCN_PRBRESP_PROMISC = 1<<4, FIF_CONTROL = 1<<5, FIF_OTHER_BSS = 1<<6, + FIF_PSPOLL = 1<<7, }; /** @@ -1289,7 +1313,8 @@ enum ieee80211_ampdu_mlme_action { * is disabled. This should turn off the hardware (at least * it must turn off frame reception.) * May be called right after add_interface if that rejects - * an interface. + * an interface. If you added any work onto the mac80211 workqueue + * you should ensure to cancel it on this callback. * Must be implemented. * * @add_interface: Called when a netdevice attached to the hardware is @@ -1411,6 +1436,8 @@ enum ieee80211_ampdu_mlme_action { * @rfkill_poll: Poll rfkill hardware state. If you need this, you also * need to set wiphy->rfkill_poll to %true before registration, * and need to call wiphy_rfkill_set_hw_state() in the callback. + * + * @testmode_cmd: Implement a cfg80211 test mode command. */ struct ieee80211_ops { int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); @@ -1461,6 +1488,9 @@ struct ieee80211_ops { struct ieee80211_sta *sta, u16 tid, u16 *ssn); void (*rfkill_poll)(struct ieee80211_hw *hw); +#ifdef CONFIG_NL80211_TESTMODE + int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); +#endif }; /** @@ -1606,9 +1636,11 @@ void ieee80211_free_hw(struct ieee80211_hw *hw); */ void ieee80211_restart_hw(struct ieee80211_hw *hw); -/* trick to avoid symbol clashes with the ieee80211 subsystem */ -void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, - struct ieee80211_rx_status *status); +/* + * trick to avoid symbol clashes with the ieee80211 subsystem, + * use the inline below instead + */ +void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); /** * ieee80211_rx - receive frame @@ -1624,13 +1656,10 @@ void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, * * @hw: the hardware this frame came in on * @skb: the buffer to receive, owned by mac80211 after this call - * @status: status of this frame; the status pointer need not be valid - * after this function returns */ -static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, - struct ieee80211_rx_status *status) +static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) { - __ieee80211_rx(hw, skb, status); + __ieee80211_rx(hw, skb); } /** @@ -1644,13 +1673,8 @@ static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, * * @hw: the hardware this frame came in on * @skb: the buffer to receive, owned by mac80211 after this call - * @status: status of this frame; the status pointer need not be valid - * after this function returns and is not freed by mac80211, - * it is recommended that it points to a stack area */ -void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, - struct sk_buff *skb, - struct ieee80211_rx_status *status); +void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); /** * ieee80211_tx_status - transmit status callback @@ -1917,6 +1941,31 @@ void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, void *data); /** + * ieee80211_queue_work - add work onto the mac80211 workqueue + * + * Drivers and mac80211 use this to add work onto the mac80211 workqueue. + * This helper ensures drivers are not queueing work when they should not be. + * + * @hw: the hardware struct for the interface we are adding work for + * @work: the work we want to add onto the mac80211 workqueue + */ +void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); + +/** + * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue + * + * Drivers and mac80211 use this to queue delayed work onto the mac80211 + * workqueue. + * + * @hw: the hardware struct for the interface we are adding work for + * @dwork: delayable work to queue onto the mac80211 workqueue + * @delay: number of jiffies to wait before queueing + */ +void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, + struct delayed_work *dwork, + unsigned long delay); + +/** * ieee80211_start_tx_ba_session - Start a tx Block Ack session. * @hw: pointer as obtained from ieee80211_alloc_hw(). * @ra: receiver address of the BA session recipient @@ -2090,6 +2139,29 @@ static inline int rate_supported(struct ieee80211_sta *sta, return (sta == NULL || sta->supp_rates[band] & BIT(index)); } +/** + * rate_control_send_low - helper for drivers for management/no-ack frames + * + * Rate control algorithms that agree to use the lowest rate to + * send management frames and NO_ACK data with the respective hw + * retries should use this in the beginning of their mac80211 get_rate + * callback. If true is returned the rate control can simply return. + * If false is returned we guarantee that sta and sta and priv_sta is + * not null. + * + * Rate control algorithms wishing to do more intelligent selection of + * rate for multicast/broadcast frames may choose to not use this. + * + * @sta: &struct ieee80211_sta pointer to the target destination. Note + * that this may be null. + * @priv_sta: private rate control structure. This may be null. + * @txrc: rate control information we sholud populate for mac80211. + */ +bool rate_control_send_low(struct ieee80211_sta *sta, + void *priv_sta, + struct ieee80211_tx_rate_control *txrc); + + static inline s8 rate_lowest_index(struct ieee80211_supported_band *sband, struct ieee80211_sta *sta) @@ -2106,6 +2178,17 @@ rate_lowest_index(struct ieee80211_supported_band *sband, return 0; } +static inline +bool rate_usable_index_exists(struct ieee80211_supported_band *sband, + struct ieee80211_sta *sta) +{ + unsigned int i; + + for (i = 0; i < sband->n_bitrates; i++) + if (rate_supported(sta, sband->band, i)) + return true; + return false; +} int ieee80211_rate_control_register(struct rate_control_ops *ops); void ieee80211_rate_control_unregister(struct rate_control_ops *ops); |