X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Fnet%2Fmac80211.h;h=45d7d44d7cbe401ff92050f31531c2526a774b30;hb=fda1021477b390506ebed0225eaa6d31a903e2b7;hp=38dc1cd102709ef2bbe1b5cf83ef458d059a3a1f;hpb=5cff20e6c5a6591a79d3b027af222870f52bb550;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 38dc1cd..45d7d44 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -3,7 +3,7 @@ * * Copyright 2002-2005, Devicescape Software, Inc. * Copyright 2006-2007 Jiri Benc - * Copyright 2007-2008 Johannes Berg + * Copyright 2007-2010 Johannes Berg * * 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 @@ -73,20 +73,19 @@ */ /** - * struct ieee80211_ht_bss_info - describing BSS's HT characteristics + * DOC: mac80211 workqueue * - * This structure describes most essential parameters needed - * to describe 802.11n HT characteristics in a BSS. + * 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. * - * @primary_channel: channel number of primery channel - * @bss_cap: 802.11n's general BSS capabilities (e.g. channel width) - * @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection) */ -struct ieee80211_ht_bss_info { - u8 primary_channel; - u8 bss_cap; /* use IEEE80211_HT_IE_CHA_ */ - u8 bss_op_mode; /* use IEEE80211_HT_IE_ */ -}; /** * enum ieee80211_max_queues - maximum number of queues @@ -108,25 +107,14 @@ enum ieee80211_max_queues { * 2^n-1 in the range 1..32767] * @cw_max: maximum contention window [like @cw_min] * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled + * @uapsd: is U-APSD mode enabled for the queue */ struct ieee80211_tx_queue_params { u16 txop; u16 cw_min; u16 cw_max; u8 aifs; -}; - -/** - * struct ieee80211_tx_queue_stats - transmit queue statistics - * - * @len: number of packets in queue - * @limit: queue length limit - * @count: number of frames sent - */ -struct ieee80211_tx_queue_stats { - unsigned int len; - unsigned int limit; - unsigned int count; + bool uapsd; }; struct ieee80211_low_level_stats { @@ -171,14 +159,6 @@ enum ieee80211_bss_change { }; /** - * struct ieee80211_bss_ht_conf - BSS's changing HT configuration - * @operation_mode: HT operation mode (like in &struct ieee80211_ht_info) - */ -struct ieee80211_bss_ht_conf { - u16 operation_mode; -}; - -/** * struct ieee80211_bss_conf - holds the BSS's changing parameters * * This structure keeps information about a BSS (and an association @@ -193,16 +173,18 @@ struct ieee80211_bss_ht_conf { * @use_short_slot: use short slot time (only relevant for ERP); * if the hardware cannot handle this it must set the * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag - * @dtim_period: num of beacons before the next DTIM, for PSM + * @dtim_period: num of beacons before the next DTIM, for beaconing, + * not valid in station mode (cf. hw conf ps_dtim_period) * @timestamp: beacon timestamp * @beacon_int: beacon interval * @assoc_capability: capabilities taken from assoc resp - * @ht: BSS's HT configuration * @basic_rates: bitmap of basic rates, each bit stands for an * index into the rate table configured by the driver in * the current band. * @bssid: The BSSID for this BSS * @enable_beacon: whether beaconing should be enabled or not + * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). + * This field is only valid when the channel type is one of the HT types. */ struct ieee80211_bss_conf { const u8 *bssid; @@ -219,7 +201,7 @@ struct ieee80211_bss_conf { u16 assoc_capability; u64 timestamp; u32 basic_rates; - struct ieee80211_bss_ht_conf ht; + u16 ht_operation_mode; }; /** @@ -227,7 +209,7 @@ struct ieee80211_bss_conf { * * These flags are used with the @flags member of &ieee80211_tx_info. * - * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. + * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence * number to this frame, taking care of not overwriting the fragment * number and increasing the sequence number only when the @@ -247,7 +229,14 @@ struct ieee80211_bss_conf { * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted - * because the destination STA was in powersave mode. + * because the destination STA was in powersave mode. Note that to + * avoid race conditions, the filter must be set by the hardware or + * firmware upon receiving a frame that indicates that the station + * went to sleep (must be done on device to filter frames already on + * the queue) and may only be unset after mac80211 gives the OK for + * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), + * since only then is it guaranteed that no more frames are in the + * hardware queue. * @IEEE80211_TX_STAT_ACK: Frame was acknowledged * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status * is for the whole aggregation. @@ -256,12 +245,28 @@ struct ieee80211_bss_conf { * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be * set by rate control algorithms to indicate probe rate, will * be cleared for fragmented frames (except on the last fragment) - * @IEEE80211_TX_INTFL_RCALGO: mac80211 internal flag, do not test or - * set this flag in the driver; indicates that the rate control - * algorithm was used and should be notified of TX status * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, * used to indicate that a pending frame requires TX processing before * 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. + * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the + * transmit function after the current frame, this can be used + * by drivers to kick the DMA queue only if unset or when the + * queue gets full. + * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted + * after TX status because the destination was asleep, it must not + * be modified again (no seqno assignment, crypto, etc.) + * @IEEE80211_TX_INTFL_HAS_RADIOTAP: This frame was injected and still + * has a radiotap header at skb->data. + * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 + * MLME command (internal to mac80211 to figure out whether to send TX + * status to user space) */ enum mac80211_tx_control_flags { IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), @@ -277,8 +282,14 @@ enum mac80211_tx_control_flags { IEEE80211_TX_STAT_AMPDU = BIT(10), IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), - 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), + IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), + IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), + IEEE80211_TX_INTFL_HAS_RADIOTAP = BIT(20), + IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), }; /** @@ -336,6 +347,21 @@ enum mac80211_rate_control_flags { * * When used for transmit status reporting, the driver should * always report the rate along with the flags it used. + * + * &struct ieee80211_tx_info contains an array of these structs + * in the control information, and it will be filled by the rate + * control algorithm according to what should be sent. For example, + * if this array contains, in the format { , } the + * information + * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } + * then this means that the frame should be transmitted + * up to twice at rate 3, up to twice at rate 2, and up to four + * times at rate 1 if it doesn't get acknowledged. Say it gets + * acknowledged by the peer after the fifth attempt, the status + * information should then contain + * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... + * since it was transmitted twice at rate 3, twice at rate 2 + * and once at rate 1 after which we received an acknowledgement. */ struct ieee80211_tx_rate { s8 idx; @@ -361,10 +387,12 @@ struct ieee80211_tx_rate { * @control: union for control data * @status: union for status data * @driver_data: array of driver_data pointers - * @ampdu_ack_len: number of aggregated frames. + * @ampdu_ack_len: number of acked aggregated frames. * relevant only if IEEE80211_TX_STATUS_AMPDU was set. * @ampdu_ack_map: block ack bit map for the aggregation. * relevant only if IEEE80211_TX_STATUS_AMPDU was set. + * @ampdu_len: number of aggregated frames. + * relevant only if IEEE80211_TX_STATUS_AMPDU was set. * @ack_signal: signal strength of the ACK frame */ struct ieee80211_tx_info { @@ -399,7 +427,8 @@ struct ieee80211_tx_info { u8 ampdu_ack_len; u64 ampdu_ack_map; int ack_signal; - /* 8 bytes free */ + u8 ampdu_len; + /* 7 bytes free */ } status; struct { struct ieee80211_tx_rate driver_rates[ @@ -417,6 +446,11 @@ 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 * @@ -460,7 +494,6 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. * Use together with %RX_FLAG_MMIC_STRIPPED. * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. - * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, * verification has been done by the hardware. * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. @@ -477,11 +510,13 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index * @RX_FLAG_40MHZ: HT40 (40 MHz) was used * @RX_FLAG_SHORT_GI: Short guard interval was used + * @RX_FLAG_INTERNAL_CMTR: set internally after frame was reported + * on cooked monitor to avoid double-reporting it for multiple + * virtual interfaces */ enum mac80211_rx_flags { RX_FLAG_MMIC_ERROR = 1<<0, RX_FLAG_DECRYPTED = 1<<1, - RX_FLAG_RADIOTAP = 1<<2, RX_FLAG_MMIC_STRIPPED = 1<<3, RX_FLAG_IV_STRIPPED = 1<<4, RX_FLAG_FAILED_FCS_CRC = 1<<5, @@ -491,6 +526,7 @@ enum mac80211_rx_flags { RX_FLAG_HT = 1<<9, RX_FLAG_40MHZ = 1<<10, RX_FLAG_SHORT_GI = 1<<11, + RX_FLAG_INTERNAL_CMTR = 1<<12, }; /** @@ -498,7 +534,7 @@ 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. @@ -508,7 +544,6 @@ enum mac80211_rx_flags { * unspecified depending on the hardware capabilities flags * @IEEE80211_HW_SIGNAL_* * @noise: noise when receiving this frame, in dBm. - * @qual: overall signal quality indication, in percent (0-100). * @antenna: antenna used * @rate_idx: index of data rate into band's supported rates or MCS index if * HT rates are use (RX_FLAG_HT) @@ -520,7 +555,6 @@ struct ieee80211_rx_status { int freq; int signal; int noise; - int qual; int antenna; int rate_idx; int flag; @@ -531,8 +565,16 @@ struct ieee80211_rx_status { * * Flags to define PHY configuration options * - * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) - * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only) + * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this + * to determine for example whether to calculate timestamps for packets + * or not, do not use instead of filter flags! + * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). + * This is the power save mode defined by IEEE 802.11-2007 section 11.2, + * meaning that the hardware still wakes up for beacons, is able to + * transmit frames and receive the possible acknowledgment frames. + * Not to be confused with hardware specific wakeup/sleep states, + * driver is responsible for that. See the section "Powersave support" + * for more. * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set * the driver should be prepared to handle configuration requests but * may turn the device off as much as possible. Typically, this flag will @@ -540,7 +582,7 @@ struct ieee80211_rx_status { * it can also be unset in that case when monitor interfaces are active. */ enum ieee80211_conf_flags { - IEEE80211_CONF_RADIOTAP = (1<<0), + IEEE80211_CONF_MONITOR = (1<<0), IEEE80211_CONF_PS = (1<<1), IEEE80211_CONF_IDLE = (1<<2), }; @@ -549,21 +591,19 @@ enum ieee80211_conf_flags { /** * enum ieee80211_conf_changed - denotes which configuration changed * - * @IEEE80211_CONF_CHANGE_RADIO_ENABLED: the value of radio_enabled changed - * @_IEEE80211_CONF_CHANGE_BEACON_INTERVAL: DEPRECATED * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed - * @IEEE80211_CONF_CHANGE_RADIOTAP: the radiotap flag changed + * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed * @IEEE80211_CONF_CHANGE_POWER: the TX power changed * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed + * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed */ enum ieee80211_conf_changed { - IEEE80211_CONF_CHANGE_RADIO_ENABLED = BIT(0), - _IEEE80211_CONF_CHANGE_BEACON_INTERVAL = BIT(1), + IEEE80211_CONF_CHANGE_SMPS = BIT(1), IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), - IEEE80211_CONF_CHANGE_RADIOTAP = BIT(3), + IEEE80211_CONF_CHANGE_MONITOR = BIT(3), IEEE80211_CONF_CHANGE_PS = BIT(4), IEEE80211_CONF_CHANGE_POWER = BIT(5), IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), @@ -571,13 +611,24 @@ enum ieee80211_conf_changed { IEEE80211_CONF_CHANGE_IDLE = BIT(8), }; -static inline __deprecated enum ieee80211_conf_changed -__IEEE80211_CONF_CHANGE_BEACON_INTERVAL(void) -{ - return _IEEE80211_CONF_CHANGE_BEACON_INTERVAL; -} -#define IEEE80211_CONF_CHANGE_BEACON_INTERVAL \ - __IEEE80211_CONF_CHANGE_BEACON_INTERVAL() +/** + * enum ieee80211_smps_mode - spatial multiplexing power save mode + * + * @IEEE80211_SMPS_AUTOMATIC: automatic + * @IEEE80211_SMPS_OFF: off + * @IEEE80211_SMPS_STATIC: static + * @IEEE80211_SMPS_DYNAMIC: dynamic + * @IEEE80211_SMPS_NUM_MODES: internal, don't use + */ +enum ieee80211_smps_mode { + IEEE80211_SMPS_AUTOMATIC, + IEEE80211_SMPS_OFF, + IEEE80211_SMPS_STATIC, + IEEE80211_SMPS_DYNAMIC, + + /* keep last */ + IEEE80211_SMPS_NUM_MODES, +}; /** * struct ieee80211_conf - configuration of the device @@ -586,15 +637,15 @@ __IEEE80211_CONF_CHANGE_BEACON_INTERVAL(void) * * @flags: configuration flags defined above * - * @radio_enabled: when zero, driver is required to switch off the radio. - * @beacon_int: beacon interval (TODO make interface config) - * * @listen_interval: listen interval in units of beacon interval * @max_sleep_period: the maximum number of beacon intervals to sleep for * before checking the beacon for a TIM bit (managed mode only); this * value will be only achievable between DTIM frames, the hardware * needs to check for the multicast traffic bit in DTIM beacons. * This variable is valid only when the CONF_PS flag is set. + * @ps_dtim_period: The DTIM period of the AP we're connected to, for use + * in power saving. Power saving will not be enabled until a beacon + * has been received and the DTIM period is known. * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the * powersave documentation below. This variable is valid only when * the CONF_PS flag is set. @@ -610,20 +661,24 @@ __IEEE80211_CONF_CHANGE_BEACON_INTERVAL(void) * @short_frame_max_tx_count: Maximum number of transmissions for a "short" * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the * number of transmissions not the number of retries + * + * @smps_mode: spatial multiplexing powersave mode; note that + * %IEEE80211_SMPS_STATIC is used when the device is not + * configured for an HT channel */ struct ieee80211_conf { - int beacon_int; u32 flags; int power_level, dynamic_ps_timeout; int max_sleep_period; u16 listen_interval; - bool radio_enabled; + u8 ps_dtim_period; u8 long_frame_max_tx_count, short_frame_max_tx_count; struct ieee80211_channel *channel; enum nl80211_channel_type channel_type; + enum ieee80211_smps_mode smps_mode; }; /** @@ -635,12 +690,14 @@ struct ieee80211_conf { * @type: type of this virtual interface * @bss_conf: BSS configuration for this interface, either our own * or the BSS we're associated to + * @addr: address of this interface * @drv_priv: data area for driver use, will always be aligned to * sizeof(void *). */ struct ieee80211_vif { enum nl80211_iftype type; struct ieee80211_bss_conf bss_conf; + u8 addr[ETH_ALEN]; /* must be last */ u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); }; @@ -654,33 +711,6 @@ static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) } /** - * struct ieee80211_if_init_conf - initial configuration of an interface - * - * @vif: pointer to a driver-use per-interface structure. The pointer - * itself is also used for various functions including - * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). - * @type: one of &enum nl80211_iftype constants. Determines the type of - * added/removed interface. - * @mac_addr: pointer to MAC address of the interface. This pointer is valid - * until the interface is removed (i.e. it cannot be used after - * remove_interface() callback was called for this interface). - * - * This structure is used in add_interface() and remove_interface() - * callbacks of &struct ieee80211_hw. - * - * When you allow multiple interfaces to be added to your PHY, take care - * that the hardware can actually handle multiple MAC addresses. However, - * also take care that when there's no interface left with mac_addr != %NULL - * you remove the MAC address from the device to avoid acknowledging packets - * in pure monitor mode. - */ -struct ieee80211_if_init_conf { - enum nl80211_iftype type; - struct ieee80211_vif *vif; - void *mac_addr; -}; - -/** * enum ieee80211_key_alg - key algorithm * @ALG_WEP: WEP40 or WEP104 * @ALG_TKIP: TKIP @@ -695,16 +725,6 @@ enum ieee80211_key_alg { }; /** - * enum ieee80211_key_len - key length - * @LEN_WEP40: WEP 5-byte long key - * @LEN_WEP104: WEP 13-byte long key - */ -enum ieee80211_key_len { - LEN_WEP40 = 5, - LEN_WEP104 = 13, -}; - -/** * enum ieee80211_key_flags - key flags * * These flags are used for communication about keys between the driver @@ -785,7 +805,7 @@ enum set_key_cmd { * mac80211, any ieee80211_sta pointer you get access to must * either be protected by rcu_read_lock() explicitly or implicitly, * or you must take good care to not use such a pointer after a - * call to your sta_notify callback that removed it. + * call to your sta_remove callback that removed it. * * @addr: MAC address * @aid: AID we assigned to the station if we're an AP @@ -811,8 +831,8 @@ struct ieee80211_sta { * indicates addition and removal of a station to station table, * or if a associated station made a power state transition. * - * @STA_NOTIFY_ADD: a station was added to the station table - * @STA_NOTIFY_REMOVE: a station being removed from the station table + * @STA_NOTIFY_ADD: (DEPRECATED) a station was added to the station table + * @STA_NOTIFY_REMOVE: (DEPRECATED) a station being removed from the station table * @STA_NOTIFY_SLEEP: a station is now sleeping * @STA_NOTIFY_AWAKE: a sleeping station woke up */ @@ -845,6 +865,19 @@ enum ieee80211_tkip_key_type { * any particular flags. There are some exceptions to this rule, * however, so you are advised to review these flags carefully. * + * @IEEE80211_HW_HAS_RATE_CONTROL: + * The hardware or firmware includes rate control, and cannot be + * controlled by the stack. As such, no rate control algorithm + * should be instantiated, and the TX rate reported to userspace + * will be taken from the TX status instead of the rate control + * algorithm. + * Note that this requires that the driver implement a number of + * callbacks so it has the correct information, it needs to have + * the @set_rts_threshold callback and must look at the BSS config + * @use_cts_prot for G/N protection, @use_short_slot for slot + * timing in 2.4 GHz and @use_short_preamble for preambles for + * CCK frames. + * * @IEEE80211_HW_RX_INCLUDES_FCS: * Indicates that received frames passed to the stack include * the FCS at the end. @@ -901,8 +934,29 @@ enum ieee80211_tkip_key_type { * @IEEE80211_HW_BEACON_FILTER: * Hardware supports dropping of irrelevant beacon frames to * avoid waking up cpu. + * + * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: + * Hardware supports static spatial multiplexing powersave, + * ie. can turn off all but one chain even on HT connections + * that should be using more chains. + * + * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: + * Hardware supports dynamic spatial multiplexing powersave, + * ie. can turn off all but one chain and then wake the rest + * up as required after, for example, rts/cts handshake. + * + * @IEEE80211_HW_SUPPORTS_UAPSD: + * Hardware supports Unscheduled Automatic Power Save Delivery + * (U-APSD) in managed mode. The mode is configured with + * conf_tx() operation. + * + * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: + * Hardware can provide ack status reports of Tx frames to + * the stack. + * */ enum ieee80211_hw_flags { + IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, @@ -917,6 +971,10 @@ enum ieee80211_hw_flags { IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, IEEE80211_HW_MFP_CAPABLE = 1<<13, IEEE80211_HW_BEACON_FILTER = 1<<14, + IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, + IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, + IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, + IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, }; /** @@ -933,12 +991,6 @@ 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. * @@ -974,7 +1026,6 @@ 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; @@ -1102,18 +1153,24 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, * * mac80211 has support for various powersave implementations. * - * First, it can support hardware that handles all powersaving by - * itself, such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS - * hardware flag. In that case, it will be told about the desired - * powersave mode depending on the association status, and the driver - * must take care of sending nullfunc frames when necessary, i.e. when - * entering and leaving powersave mode. The driver is required to look at - * the AID in beacons and signal to the AP that it woke up when it finds - * traffic directed to it. This mode supports dynamic PS by simply - * enabling/disabling PS. - * - * Additionally, such hardware may set the %IEEE80211_HW_SUPPORTS_DYNAMIC_PS - * flag to indicate that it can support dynamic PS mode itself (see below). + * First, it can support hardware that handles all powersaving by itself, + * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware + * flag. In that case, it will be told about the desired powersave mode + * with the %IEEE80211_CONF_PS flag depending on the association status. + * The hardware must take care of sending nullfunc frames when necessary, + * i.e. when entering and leaving powersave mode. The hardware is required + * to look at the AID in beacons and signal to the AP that it woke up when + * it finds traffic directed to it. + * + * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in + * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused + * with hardware wakeup and sleep states. Driver is responsible for waking + * up the hardware before issueing commands to the hardware and putting it + * back to sleep at approriate times. + * + * When PS is enabled, hardware needs to wakeup for beacons and receive the + * buffered multicast/broadcast frames after the beacon. Also it must be + * possible to send frames and receive the acknowledment frame. * * Other hardware designs cannot send nullfunc frames by themselves and also * need software support for parsing the TIM bitmap. This is also supported @@ -1121,14 +1178,35 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still * required to pass up beacons. The hardware is still required to handle * waking up for multicast traffic; if it cannot the driver must handle that - * as best as it can, mac80211 is too slow. - * - * Dynamic powersave mode is an extension to normal powersave mode in which - * the hardware stays awake for a user-specified period of time after sending - * a frame so that reply frames need not be buffered and therefore delayed - * to the next wakeup. This can either be supported by hardware, in which case - * the driver needs to look at the @dynamic_ps_timeout hardware configuration - * value, or by the stack if all nullfunc handling is in the stack. + * as best as it can, mac80211 is too slow to do that. + * + * Dynamic powersave is an extension to normal powersave in which the + * hardware stays awake for a user-specified period of time after sending a + * frame so that reply frames need not be buffered and therefore delayed to + * the next wakeup. It's compromise of getting good enough latency when + * there's data traffic and still saving significantly power in idle + * periods. + * + * Dynamic powersave is supported by simply mac80211 enabling and disabling + * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS + * flag and mac80211 will handle everything automatically. Additionally, + * hardware having support for the dynamic PS feature may set the + * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support + * dynamic PS mode itself. The driver needs to look at the + * @dynamic_ps_timeout hardware configuration value and use it that value + * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable + * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS + * enabled whenever user has enabled powersave. + * + * Driver informs U-APSD client support by enabling + * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the + * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS + * Nullfunc frames and stay awake until the service period has ended. To + * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames + * from that AC are transmitted with powersave enabled. + * + * Note: U-APSD client mode is not yet supported with + * %IEEE80211_HW_PS_NULLFUNC_STACK. */ /** @@ -1192,6 +1270,31 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, */ /** + * DOC: Spatial multiplexing power save + * + * SMPS (Spatial multiplexing power save) is a mechanism to conserve + * power in an 802.11n implementation. For details on the mechanism + * and rationale, please refer to 802.11 (as amended by 802.11n-2009) + * "11.2.3 SM power save". + * + * The mac80211 implementation is capable of sending action frames + * to update the AP about the station's SMPS mode, and will instruct + * the driver to enter the specific mode. It will also announce the + * requested SMPS mode during the association handshake. Hardware + * support for this feature is required, and can be indicated by + * hardware flags. + * + * The default mode will be "automatic", which nl80211/cfg80211 + * defines to be dynamic SMPS in (regular) powersave, and SMPS + * turned off otherwise. + * + * To support this feature, the driver must set the appropriate + * hardware support flags, and handle the SMPS flag to the config() + * operation. It will then with this mechanism be instructed to + * enter the requested SMPS mode while associated to an HT AP. + */ + +/** * DOC: Frame filtering * * mac80211 requires to see many management frames for proper @@ -1204,10 +1307,13 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, * the driver's configure_filter() function which frames should be * passed to mac80211 and which should be filtered out. * - * The configure_filter() callback is invoked with the parameters - * @mc_count and @mc_list for the combined multicast address list - * of all virtual interfaces, @changed_flags telling which flags - * were changed and @total_flags with the new flag states. + * Before configure_filter() is invoked, the prepare_multicast() + * callback is invoked with the parameters @mc_count and @mc_list + * for the combined multicast address list of all virtual interfaces. + * It's use is optional, and it returns a u64 that is passed to + * configure_filter(). Additionally, configure_filter() has the + * arguments @changed_flags telling which flags were changed and + * @total_flags with the new flag states. * * If your device has no multicast address filters your driver will * need to check both the %FIF_ALLMULTI flag and the @mc_count @@ -1256,10 +1362,13 @@ 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, @@ -1269,6 +1378,7 @@ enum ieee80211_filter_flags { FIF_BCN_PRBRESP_PROMISC = 1<<4, FIF_CONTROL = 1<<5, FIF_OTHER_BSS = 1<<6, + FIF_PSPOLL = 1<<7, }; /** @@ -1276,6 +1386,12 @@ enum ieee80211_filter_flags { * * These flags are used with the ampdu_action() callback in * &struct ieee80211_ops to indicate which action is needed. + * + * Note that drivers MUST be able to deal with a TX aggregation + * session being stopped even before they OK'ed starting it by + * calling ieee80211_start_tx_ba_cb(_irqsafe), because the peer + * might receive the addBA frame and send a delBA right away! + * * @IEEE80211_AMPDU_RX_START: start Rx aggregation * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation * @IEEE80211_AMPDU_TX_START: start Tx aggregation @@ -1315,14 +1431,15 @@ enum ieee80211_ampdu_mlme_action { * When the device is started it should not have a MAC address * to avoid acknowledging frames before a non-monitor device * is added. - * Must be implemented. + * Must be implemented and can sleep. * * @stop: Called after last netdevice attached to the hardware * 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. - * Must be implemented. + * an interface. If you added any work onto the mac80211 workqueue + * you should ensure to cancel it on this callback. + * Must be implemented and can sleep. * * @add_interface: Called when a netdevice attached to the hardware is * enabled. Because it is not called for monitor mode devices, @start @@ -1332,7 +1449,7 @@ enum ieee80211_ampdu_mlme_action { * interface is given in the conf parameter. * The callback may refuse to add an interface by returning a * negative error code (which will be seen in userspace.) - * Must be implemented. + * Must be implemented and can sleep. * * @remove_interface: Notifies a driver that an interface is going down. * The @stop callback is called after this if it is the last interface @@ -1341,36 +1458,43 @@ enum ieee80211_ampdu_mlme_action { * must be cleared so the device no longer acknowledges packets, * the mac_addr member of the conf structure is, however, set to the * MAC address of the device going away. - * Hence, this callback must be implemented. + * Hence, this callback must be implemented. It can sleep. * * @config: Handler for configuration requests. IEEE 802.11 code calls this * function to change hardware configuration, e.g., channel. * This function should never fail but returns a negative error code - * if it does. + * if it does. The callback can sleep. * * @bss_info_changed: Handler for configuration requests related to BSS * parameters that may vary during BSS's lifespan, and may affect low * level driver (e.g. assoc/disassoc status, erp parameters). * This function should not be used if no BSS has been set, unless * for association indication. The @changed parameter indicates which - * of the bss parameters has changed when a call is made. + * of the bss parameters has changed when a call is made. The callback + * can sleep. + * + * @prepare_multicast: Prepare for multicast filter configuration. + * This callback is optional, and its return value is passed + * to configure_filter(). This callback must be atomic. * * @configure_filter: Configure the device's RX filter. * See the section "Frame filtering" for more information. - * This callback must be implemented and atomic. + * This callback must be implemented and can sleep. * * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit * must be set or cleared for a given STA. Must be atomic. * * @set_key: See the section "Hardware crypto acceleration" - * This callback can sleep, and is only called between add_interface - * and remove_interface calls, i.e. while the given virtual interface + * This callback is only called between add_interface and + * remove_interface calls, i.e. while the given virtual interface * is enabled. * Returns a negative error code if the key can't be added. + * The callback can sleep. * * @update_tkip_key: See the section "Hardware crypto acceleration" * This callback will be called in the context of Rx. Called for drivers * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. + * The callback must be atomic. * * @hw_scan: Ask the hardware to service the scan request, no need to start * the scan state machine in stack. The scan must honour the channel @@ -1384,53 +1508,64 @@ enum ieee80211_ampdu_mlme_action { * When the scan finishes, ieee80211_scan_completed() must be called; * note that it also must be called when the scan cannot finish due to * any error unless this callback returned a negative error code. + * The callback can sleep. * * @sw_scan_start: Notifier function that is called just before a software scan * is started. Can be NULL, if the driver doesn't need this notification. + * The callback can sleep. * - * @sw_scan_complete: Notifier function that is called just after a software scan - * finished. Can be NULL, if the driver doesn't need this notification. + * @sw_scan_complete: Notifier function that is called just after a + * software scan finished. Can be NULL, if the driver doesn't need + * this notification. + * The callback can sleep. * * @get_stats: Return low-level statistics. * Returns zero if statistics are available. + * The callback can sleep. * * @get_tkip_seq: If your device implements TKIP encryption in hardware this * callback should be provided to read the TKIP transmit IVs (both IV32 * and IV16) for the given key from hardware. + * The callback must be atomic. * * @set_rts_threshold: Configuration of RTS threshold (if device needs it) + * The callback can sleep. + * + * @sta_add: Notifies low level driver about addition of an associated station, + * AP, IBSS/WDS/mesh peer etc. This callback can sleep. + * + * @sta_remove: Notifies low level driver about removal of an associated + * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. * - * @sta_notify: Notifies low level driver about addition, removal or power - * state transition of an associated station, AP, IBSS/WDS/mesh peer etc. - * Must be atomic. + * @sta_notify: Notifies low level driver about power state transition of an + * associated station, AP, IBSS/WDS/mesh peer etc. Must be atomic. * * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), * bursting) for a hardware TX queue. * Returns a negative error code on failure. - * - * @get_tx_stats: Get statistics of the current TX queue status. This is used - * to get number of currently queued packets (queue length), maximum queue - * size (limit), and total number of packets sent using each TX queue - * (count). The 'stats' pointer points to an array that has hw->queues - * items. + * The callback can sleep. * * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, * this is only used for IBSS mode BSSID merging and debugging. Is not a * required function. + * The callback can sleep. * * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. * Currently, this is only used for IBSS mode debugging. Is not a * required function. + * The callback can sleep. * * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize * with other STAs in the IBSS. This is only used in IBSS mode. This * function is optional if the firmware/hardware takes full care of * TSF synchronization. + * The callback can sleep. * * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. * This is needed only for IBSS mode and the result of this function is * used to determine whether to reply to Probe Requests. * Returns non-zero if this device sent the last beacon. + * The callback can sleep. * * @ampdu_action: Perform a certain A-MPDU action * The RA/TID combination determines the destination and TID we want @@ -1439,32 +1574,53 @@ enum ieee80211_ampdu_mlme_action { * is the first frame we expect to perform the action on. Notice * that TX/RX_STOP can pass NULL for this parameter. * Returns a negative error code on failure. + * The callback must be atomic. + * + * @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. + * The callback can sleep. + * + * @set_coverage_class: Set slot time for given coverage class as specified + * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout + * accordingly. This callback is not required and may sleep. + * + * @testmode_cmd: Implement a cfg80211 test mode command. + * The callback can sleep. + * + * @flush: Flush all pending frames from the hardware queue, making sure + * that the hardware queues are empty. If the parameter @drop is set + * to %true, pending frames may be dropped. The callback can sleep. */ struct ieee80211_ops { int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); int (*start)(struct ieee80211_hw *hw); void (*stop)(struct ieee80211_hw *hw); int (*add_interface)(struct ieee80211_hw *hw, - struct ieee80211_if_init_conf *conf); + struct ieee80211_vif *vif); void (*remove_interface)(struct ieee80211_hw *hw, - struct ieee80211_if_init_conf *conf); + struct ieee80211_vif *vif); int (*config)(struct ieee80211_hw *hw, u32 changed); void (*bss_info_changed)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *info, u32 changed); + u64 (*prepare_multicast)(struct ieee80211_hw *hw, + int mc_count, struct dev_addr_list *mc_list); void (*configure_filter)(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, - int mc_count, struct dev_addr_list *mc_list); + u64 multicast); int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set); int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key); void (*update_tkip_key)(struct ieee80211_hw *hw, - struct ieee80211_key_conf *conf, const u8 *address, - u32 iv32, u16 *phase1key); + struct ieee80211_vif *vif, + struct ieee80211_key_conf *conf, + struct ieee80211_sta *sta, + u32 iv32, u16 *phase1key); int (*hw_scan)(struct ieee80211_hw *hw, struct cfg80211_scan_request *req); void (*sw_scan_start)(struct ieee80211_hw *hw); @@ -1474,19 +1630,29 @@ struct ieee80211_ops { void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, u32 *iv32, u16 *iv16); int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); + int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_sta *sta); + int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_sta *sta); void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum sta_notify_cmd, struct ieee80211_sta *sta); int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, const struct ieee80211_tx_queue_params *params); - int (*get_tx_stats)(struct ieee80211_hw *hw, - struct ieee80211_tx_queue_stats *stats); u64 (*get_tsf)(struct ieee80211_hw *hw); void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf); void (*reset_tsf)(struct ieee80211_hw *hw); int (*tx_last_beacon)(struct ieee80211_hw *hw); int (*ampdu_action)(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, enum ieee80211_ampdu_mlme_action action, struct ieee80211_sta *sta, u16 tid, u16 *ssn); + + void (*rfkill_poll)(struct ieee80211_hw *hw); + void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); +#ifdef CONFIG_NL80211_TESTMODE + int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); +#endif + void (*flush)(struct ieee80211_hw *hw, bool drop); }; /** @@ -1632,32 +1798,23 @@ 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); - /** * ieee80211_rx - receive frame * * Use this function to hand received frames to mac80211. The receive - * buffer in @skb must start with an IEEE 802.11 header or a radiotap - * header if %RX_FLAG_RADIOTAP is set in the @status flags. + * buffer in @skb must start with an IEEE 802.11 header. * * This function may not be called in IRQ context. Calls to this function - * for a single hardware must be synchronized against each other. Calls - * to this function and ieee80211_rx_irqsafe() may not be mixed for a - * single hardware. + * for a single hardware must be synchronized against each other. Calls to + * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be + * mixed for a single hardware. + * + * In process context use instead ieee80211_rx_ni(). * * @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) -{ - __ieee80211_rx(hw, skb, status); -} +void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); /** * ieee80211_rx_irqsafe - receive frame @@ -1665,18 +1822,39 @@ static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, * Like ieee80211_rx() but can be called in IRQ context * (internally defers to a tasklet.) * - * Calls to this function and ieee80211_rx() may not be mixed for a - * single hardware. + * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not + * be mixed for a single hardware. * * @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_rx_ni - receive frame (in process context) + * + * Like ieee80211_rx() but can be called in process context + * (internally disables bottom halves). + * + * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may + * not be mixed for a single hardware. + * + * @hw: the hardware this frame came in on + * @skb: the buffer to receive, owned by mac80211 after this call + */ +static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, + struct sk_buff *skb) +{ + local_bh_disable(); + ieee80211_rx(hw, skb); + local_bh_enable(); +} + +/* + * The TX headroom reserved by mac80211 for its own tx_status functions. + * This is enough for the radiotap header. + */ +#define IEEE80211_TX_STATUS_HEADROOM 13 /** * ieee80211_tx_status - transmit status callback @@ -1712,24 +1890,97 @@ void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); /** - * ieee80211_beacon_get - beacon generation function + * ieee80211_beacon_get_tim - beacon generation function * @hw: pointer obtained from ieee80211_alloc_hw(). - * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. + * @vif: &struct ieee80211_vif pointer from the add_interface callback. + * @tim_offset: pointer to variable that will receive the TIM IE offset. + * Set to 0 if invalid (in non-AP modes). + * @tim_length: pointer to variable that will receive the TIM IE length, + * (including the ID and length bytes!). + * Set to 0 if invalid (in non-AP modes). + * + * If the driver implements beaconing modes, it must use this function to + * obtain the beacon frame/template. * * If the beacon frames are generated by the host system (i.e., not in - * hardware/firmware), the low-level driver uses this function to receive - * the next beacon frame from the 802.11 code. The low-level is responsible - * for calling this function before beacon data is needed (e.g., based on - * hardware interrupt). Returned skb is used only once and low-level driver - * is responsible for freeing it. + * hardware/firmware), the driver uses this function to get each beacon + * frame from mac80211 -- it is responsible for calling this function + * before the beacon is needed (e.g. based on hardware interrupt). + * + * If the beacon frames are generated by the device, then the driver + * must use the returned beacon as the template and change the TIM IE + * according to the current DTIM parameters/TIM bitmap. + * + * The driver is responsible for freeing the returned skb. + */ +struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + u16 *tim_offset, u16 *tim_length); + +/** + * ieee80211_beacon_get - beacon generation function + * @hw: pointer obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback. + * + * See ieee80211_beacon_get_tim(). */ -struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, +static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); +} + +/** + * ieee80211_pspoll_get - retrieve a PS Poll template + * @hw: pointer obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback. + * + * Creates a PS Poll a template which can, for example, uploaded to + * hardware. The template must be updated after association so that correct + * AID, BSSID and MAC address is used. + * + * Note: Caller (or hardware) is responsible for setting the + * &IEEE80211_FCTL_PM bit. + */ +struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif); /** + * ieee80211_nullfunc_get - retrieve a nullfunc template + * @hw: pointer obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback. + * + * Creates a Nullfunc template which can, for example, uploaded to + * hardware. The template must be updated after association so that correct + * BSSID and address is used. + * + * Note: Caller (or hardware) is responsible for setting the + * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. + */ +struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, + struct ieee80211_vif *vif); + +/** + * ieee80211_probereq_get - retrieve a Probe Request template + * @hw: pointer obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback. + * @ssid: SSID buffer + * @ssid_len: length of SSID + * @ie: buffer containing all IEs except SSID for the template + * @ie_len: length of the IE buffer + * + * Creates a Probe Request template which can, for example, be uploaded to + * hardware. + */ +struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + const u8 *ssid, size_t ssid_len, + const u8 *ie, size_t ie_len); + +/** * ieee80211_rts_get - RTS frame generation function * @hw: pointer obtained from ieee80211_alloc_hw(). - * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. + * @vif: &struct ieee80211_vif pointer from the add_interface callback. * @frame: pointer to the frame that is going to be protected by the RTS. * @frame_len: the frame length (in octets). * @frame_txctl: &struct ieee80211_tx_info of the frame. @@ -1748,7 +1999,7 @@ void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, /** * ieee80211_rts_duration - Get the duration field for an RTS frame * @hw: pointer obtained from ieee80211_alloc_hw(). - * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. + * @vif: &struct ieee80211_vif pointer from the add_interface callback. * @frame_len: the length of the frame that is going to be protected by the RTS. * @frame_txctl: &struct ieee80211_tx_info of the frame. * @@ -1763,7 +2014,7 @@ __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, /** * ieee80211_ctstoself_get - CTS-to-self frame generation function * @hw: pointer obtained from ieee80211_alloc_hw(). - * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. + * @vif: &struct ieee80211_vif pointer from the add_interface callback. * @frame: pointer to the frame that is going to be protected by the CTS-to-self. * @frame_len: the frame length (in octets). * @frame_txctl: &struct ieee80211_tx_info of the frame. @@ -1783,7 +2034,7 @@ void ieee80211_ctstoself_get(struct ieee80211_hw *hw, /** * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame * @hw: pointer obtained from ieee80211_alloc_hw(). - * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. + * @vif: &struct ieee80211_vif pointer from the add_interface callback. * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. * @frame_txctl: &struct ieee80211_tx_info of the frame. * @@ -1799,7 +2050,7 @@ __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, /** * ieee80211_generic_frame_duration - Calculate the duration field for a frame * @hw: pointer obtained from ieee80211_alloc_hw(). - * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. + * @vif: &struct ieee80211_vif pointer from the add_interface callback. * @frame_len: the length of the frame. * @rate: the rate at which the frame is going to be transmitted. * @@ -1814,7 +2065,7 @@ __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, /** * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames * @hw: pointer as obtained from ieee80211_alloc_hw(). - * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. + * @vif: &struct ieee80211_vif pointer from the add_interface callback. * * Function for accessing buffered broadcast and multicast frames. If * hardware/firmware does not implement buffering of broadcast/multicast @@ -1835,24 +2086,6 @@ struct sk_buff * ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); /** - * ieee80211_get_hdrlen_from_skb - get header length from data - * - * Given an skb with a raw 802.11 header at the data pointer this function - * returns the 802.11 header length in bytes (not including encryption - * headers). If the data in the sk_buff is too short to contain a valid 802.11 - * header the function returns 0. - * - * @skb: the frame - */ -unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); - -/** - * ieee80211_hdrlen - get header length in bytes from frame control - * @fc: frame control field in little-endian format - */ -unsigned int ieee80211_hdrlen(__le16 fc); - -/** * ieee80211_get_tkip_key - get a TKIP rc4 for skb * * This function computes a TKIP rc4 key for an skb. It computes @@ -1961,9 +2194,33 @@ 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 + * @sta: the station for which to start a BA session * @tid: the TID to BA on. * * Return: success if addBA request was sent, failure otherwise @@ -1972,22 +2229,22 @@ void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, * the need to start aggregation on a certain RA/TID, the session level * will be managed by the mac80211. */ -int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); +int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid); /** * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. - * @hw: pointer as obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback * @ra: receiver address of the BA session recipient. * @tid: the TID to BA on. * * This function must be called by low level driver once it has * finished with preparations for the BA session. */ -void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); +void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid); /** * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. - * @hw: pointer as obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback * @ra: receiver address of the BA session recipient. * @tid: the TID to BA on. * @@ -1995,13 +2252,12 @@ void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); * finished with preparations for the BA session. * This version of the function is IRQ-safe. */ -void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, +void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, u16 tid); /** * ieee80211_stop_tx_ba_session - Stop a Block Ack session. - * @hw: pointer as obtained from ieee80211_alloc_hw(). - * @ra: receiver address of the BA session recipient + * @sta: the station whose BA session to stop * @tid: the TID to stop BA. * @initiator: if indicates initiator DELBA frame will be sent. * @@ -2011,24 +2267,23 @@ void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, * the need to stop aggregation on a certain RA/TID, the session level * will be managed by the mac80211. */ -int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, - u8 *ra, u16 tid, +int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid, enum ieee80211_back_parties initiator); /** * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. - * @hw: pointer as obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback * @ra: receiver address of the BA session recipient. * @tid: the desired TID to BA on. * * This function must be called by low level driver once it has * finished with preparations for the BA session tear down. */ -void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); +void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid); /** * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. - * @hw: pointer as obtained from ieee80211_alloc_hw(). + * @vif: &struct ieee80211_vif pointer from the add_interface callback * @ra: receiver address of the BA session recipient. * @tid: the desired TID to BA on. * @@ -2036,25 +2291,78 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); * finished with preparations for the BA session tear down. * This version of the function is IRQ-safe. */ -void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, +void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, u16 tid); /** * ieee80211_find_sta - find a station * - * @hw: pointer as obtained from ieee80211_alloc_hw() + * @vif: virtual interface to look for station on * @addr: station's address * * This function must be called under RCU lock and the * resulting pointer is only valid under RCU lock as well. */ -struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw, +struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, const u8 *addr); /** + * ieee80211_find_sta_by_hw - find a station on hardware + * + * @hw: pointer as obtained from ieee80211_alloc_hw() + * @addr: station's address + * + * This function must be called under RCU lock and the + * resulting pointer is only valid under RCU lock as well. + * + * NOTE: This function should not be used! When mac80211 is converted + * internally to properly keep track of stations on multiple + * virtual interfaces, it will not always know which station to + * return here since a single address might be used by multiple + * logical stations (e.g. consider a station connecting to another + * BSSID on the same AP hardware without disconnecting first). + * + * DO NOT USE THIS FUNCTION. + */ +struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw, + const u8 *addr); + +/** + * ieee80211_sta_block_awake - block station from waking up + * @hw: the hardware + * @pubsta: the station + * @block: whether to block or unblock + * + * Some devices require that all frames that are on the queues + * for a specific station that went to sleep are flushed before + * a poll response or frames after the station woke up can be + * delivered to that it. Note that such frames must be rejected + * by the driver as filtered, with the appropriate status flag. + * + * This function allows implementing this mode in a race-free + * manner. + * + * To do this, a driver must keep track of the number of frames + * still enqueued for a specific station. If this number is not + * zero when the station goes to sleep, the driver must call + * this function to force mac80211 to consider the station to + * be asleep regardless of the station's actual state. Once the + * number of outstanding frames reaches zero, the driver must + * call this function again to unblock the station. That will + * cause mac80211 to be able to send ps-poll responses, and if + * the station queried in the meantime then frames will also + * be sent out as a result of this. Additionally, the driver + * will be notified that the station woke up some time after + * it is unblocked, regardless of whether the station actually + * woke up while blocked or not. + */ +void ieee80211_sta_block_awake(struct ieee80211_hw *hw, + struct ieee80211_sta *pubsta, bool block); + +/** * ieee80211_beacon_loss - inform hardware does not receive beacons * - * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. + * @vif: &struct ieee80211_vif pointer from the add_interface callback. * * When beacon filtering is enabled with IEEE80211_HW_BEACON_FILTERING and * IEEE80211_CONF_PS is set, the driver needs to inform whenever the @@ -2088,8 +2396,12 @@ enum rate_control_changed { * @short_preamble: whether mac80211 will request short-preamble transmission * if the selected rate supports it * @max_rate_idx: user-requested maximum rate (not MCS for now) + * (deprecated; this will be removed once drivers get updated to use + * rate_idx_mask) + * @rate_idx_mask: user-requested rate mask (not MCS for now) * @skb: the skb that will be transmitted, the control information in it needs * to be filled in + * @ap: whether this frame is sent out in AP mode */ struct ieee80211_tx_rate_control { struct ieee80211_hw *hw; @@ -2099,6 +2411,8 @@ struct ieee80211_tx_rate_control { struct ieee80211_tx_rate reported_rate; bool rts, short_preamble; u8 max_rate_idx; + u32 rate_idx_mask; + bool ap; }; struct rate_control_ops { @@ -2112,7 +2426,8 @@ struct rate_control_ops { struct ieee80211_sta *sta, void *priv_sta); void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, struct ieee80211_sta *sta, - void *priv_sta, u32 changed); + void *priv_sta, u32 changed, + enum nl80211_channel_type oper_chan_type); void (*free_sta)(void *priv, struct ieee80211_sta *sta, void *priv_sta); @@ -2134,6 +2449,29 @@ 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) @@ -2150,6 +2488,17 @@ 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);