FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/iwlwifi/mvm/sta.h

     /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
     /*
      * Copyright (C) 2012-2014, 2018-2021 Intel Corporation
      * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
      * Copyright (C) 2015-2016 Intel Deutschland GmbH
      */
     #ifndef __sta_h__
     #define __sta_h__
     
    #include <linux/spinlock.h>
    #include <net/mac80211.h>
    #include <linux/wait.h>
    
    #include "iwl-trans.h" /* for IWL_MAX_TID_COUNT */
    #include "fw-api.h" /* IWL_MVM_STATION_COUNT_MAX */
    #include "rs.h"
    
    struct iwl_mvm;
    struct iwl_mvm_vif;
    
    /**
     * DOC: DQA - Dynamic Queue Allocation -introduction
     *
     * Dynamic Queue Allocation (AKA "DQA") is a feature implemented in iwlwifi
     * driver to allow dynamic allocation of queues on-demand, rather than allocate
     * them statically ahead of time. Ideally, we would like to allocate one queue
     * per RA/TID, thus allowing an AP - for example - to send BE traffic to STA2
     * even if it also needs to send traffic to a sleeping STA1, without being
     * blocked by the sleeping station.
     *
     * Although the queues in DQA mode are dynamically allocated, there are still
     * some queues that are statically allocated:
     *      TXQ #0 - command queue
     *      TXQ #1 - aux frames
     *      TXQ #2 - P2P device frames
     *      TXQ #3 - P2P GO/SoftAP GCAST/BCAST frames
     *      TXQ #4 - BSS DATA frames queue
     *      TXQ #5-8 - Non-QoS and MGMT frames queue pool
     *      TXQ #9 - P2P GO/SoftAP probe responses
     *      TXQ #10-31 - DATA frames queue pool
     * The queues are dynamically taken from either the MGMT frames queue pool or
     * the DATA frames one. See the %iwl_mvm_dqa_txq for more information on every
     * queue.
     *
     * When a frame for a previously unseen RA/TID comes in, it needs to be deferred
     * until a queue is allocated for it, and only then can be TXed. Therefore, it
     * is placed into %iwl_mvm_tid_data.deferred_tx_frames, and a worker called
     * %mvm->add_stream_wk later allocates the queues and TXes the deferred frames.
     *
     * For convenience, MGMT is considered as if it has TID=8, and go to the MGMT
     * queues in the pool. If there is no longer a free MGMT queue to allocate, a
     * queue will be allocated from the DATA pool instead. Since QoS NDPs can create
     * a problem for aggregations, they too will use a MGMT queue.
     *
     * When adding a STA, a DATA queue is reserved for it so that it can TX from
     * it. If no such free queue exists for reserving, the STA addition will fail.
     *
     * If the DATA queue pool gets exhausted, no new STA will be accepted, and if a
     * new RA/TID comes in for an existing STA, one of the STA's queues will become
     * shared and will serve more than the single TID (but always for the same RA!).
     *
     * When a RA/TID needs to become aggregated, no new queue is required to be
     * allocated, only mark the queue as aggregated via the ADD_STA command. Note,
     * however, that a shared queue cannot be aggregated, and only after the other
     * TIDs become inactive and are removed - only then can the queue be
     * reconfigured and become aggregated.
     *
     * When removing a station, its queues are returned to the pool for reuse. Here
     * we also need to make sure that we are synced with the worker thread that TXes
     * the deferred frames so we don't get into a situation where the queues are
     * removed and then the worker puts deferred frames onto the released queues or
     * tries to allocate new queues for a STA we don't need anymore.
     */
    
    /**
     * DOC: station table - introduction
     *
     * The station table is a list of data structure that reprensent the stations.
     * In STA/P2P client mode, the driver will hold one station for the AP/ GO.
     * In GO/AP mode, the driver will have as many stations as associated clients.
     * All these stations are reflected in the fw's station table. The driver
     * keeps the fw's station table up to date with the ADD_STA command. Stations
     * can be removed by the REMOVE_STA command.
     *
     * All the data related to a station is held in the structure %iwl_mvm_sta
     * which is embed in the mac80211's %ieee80211_sta (in the drv_priv) area.
     * This data includes the index of the station in the fw, per tid information
     * (sequence numbers, Block-ack state machine, etc...). The stations are
     * created and deleted by the %sta_state callback from %ieee80211_ops.
     *
     * The driver holds a map: %fw_id_to_mac_id that allows to fetch a
     * %ieee80211_sta (and the %iwl_mvm_sta embedded into it) based on a fw
     * station index. That way, the driver is able to get the tid related data in
     * O(1) in time sensitive paths (Tx / Tx response / BA notification). These
     * paths are triggered by the fw, and the driver needs to get a pointer to the
     * %ieee80211 structure. This map helps to get that pointer quickly.
     */
    
    /**
    * DOC: station table - locking
    *
    * As stated before, the station is created / deleted by mac80211's %sta_state
    * callback from %ieee80211_ops which can sleep. The next paragraph explains
    * the locking of a single stations, the next ones relates to the station
    * table.
    *
    * The station holds the sequence number per tid. So this data needs to be
    * accessed in the Tx path (which is softIRQ). It also holds the Block-Ack
    * information (the state machine / and the logic that checks if the queues
    * were drained), so it also needs to be accessible from the Tx response flow.
    * In short, the station needs to be access from sleepable context as well as
    * from tasklets, so the station itself needs a spinlock.
    *
    * The writers of %fw_id_to_mac_id map are serialized by the global mutex of
    * the mvm op_mode. This is possible since %sta_state can sleep.
    * The pointers in this map are RCU protected, hence we won't replace the
    * station while we have Tx / Tx response / BA notification running.
    *
    * If a station is deleted while it still has packets in its A-MPDU queues,
    * then the reclaim flow will notice that there is no station in the map for
    * sta_id and it will dump the responses.
    */
   
   /**
    * DOC: station table - internal stations
    *
    * The FW needs a few internal stations that are not reflected in
    * mac80211, such as broadcast station in AP / GO mode, or AUX sta for
    * scanning and P2P device (during the GO negotiation).
    * For these kind of stations we have %iwl_mvm_int_sta struct which holds the
    * data relevant for them from both %iwl_mvm_sta and %ieee80211_sta.
    * Usually the data for these stations is static, so no locking is required,
    * and no TID data as this is also not needed.
    * One thing to note, is that these stations have an ID in the fw, but not
    * in mac80211. In order to "reserve" them a sta_id in %fw_id_to_mac_id
    * we fill ERR_PTR(EINVAL) in this mapping and all other dereferencing of
    * pointers from this mapping need to check that the value is not error
    * or NULL.
    *
    * Currently there is only one auxiliary station for scanning, initialized
    * on init.
    */
   
   /**
    * DOC: station table - AP Station in STA mode
    *
    * %iwl_mvm_vif includes the index of the AP station in the fw's STA table:
    * %ap_sta_id. To get the point to the corresponding %ieee80211_sta,
    * &fw_id_to_mac_id can be used. Due to the way the fw works, we must not remove
    * the AP station from the fw before setting the MAC context as unassociated.
    * Hence, %fw_id_to_mac_id[%ap_sta_id] will be NULLed when the AP station is
    * removed by mac80211, but the station won't be removed in the fw until the
    * VIF is set as unassociated. Then, %ap_sta_id will be invalidated.
    */
   
   /**
    * DOC: station table - Drain vs. Flush
    *
    * Flush means that all the frames in the SCD queue are dumped regardless the
    * station to which they were sent. We do that when we disassociate and before
    * we remove the STA of the AP. The flush can be done synchronously against the
    * fw.
    * Drain means that the fw will drop all the frames sent to a specific station.
    * This is useful when a client (if we are IBSS / GO or AP) disassociates.
    */
   
   /**
    * DOC: station table - fw restart
    *
    * When the fw asserts, or we have any other issue that requires to reset the
    * driver, we require mac80211 to reconfigure the driver. Since the private
    * data of the stations is embed in mac80211's %ieee80211_sta, that data will
    * not be zeroed and needs to be reinitialized manually.
    * %IWL_MVM_STATUS_IN_HW_RESTART is set during restart and that will hint us
    * that we must not allocate a new sta_id but reuse the previous one. This
    * means that the stations being re-added after the reset will have the same
    * place in the fw as before the reset. We do need to zero the %fw_id_to_mac_id
    * map, since the stations aren't in the fw any more. Internal stations that
    * are not added by mac80211 will be re-added in the init flow that is called
    * after the restart: mac80211 call's %iwl_mvm_mac_start which calls to
    * %iwl_mvm_up.
    */
   
   /**
    * DOC: AP mode - PS
    *
    * When a station is asleep, the fw will set it as "asleep". All frames on
    * shared queues (i.e. non-aggregation queues) to that station will be dropped
    * by the fw (%TX_STATUS_FAIL_DEST_PS failure code).
    *
    * AMPDUs are in a separate queue that is stopped by the fw. We just need to
    * let mac80211 know when there are frames in these queues so that it can
    * properly handle trigger frames.
    *
    * When a trigger frame is received, mac80211 tells the driver to send frames
    * from the AMPDU queues or sends frames to non-aggregation queues itself,
    * depending on which ACs are delivery-enabled and what TID has frames to
    * transmit. Note that mac80211 has all the knowledge since all the non-agg
    * frames are buffered / filtered, and the driver tells mac80211 about agg
    * frames). The driver needs to tell the fw to let frames out even if the
    * station is asleep. This is done by %iwl_mvm_sta_modify_sleep_tx_count.
    *
    * When we receive a frame from that station with PM bit unset, the driver
    * needs to let the fw know that this station isn't asleep any more. This is
    * done by %iwl_mvm_sta_modify_ps_wake in response to mac80211 signaling the
    * station's wakeup.
    *
    * For a GO, the Service Period might be cut short due to an absence period
    * of the GO. In this (and all other cases) the firmware notifies us with the
    * EOSP_NOTIFICATION, and we notify mac80211 of that. Further frames that we
    * already sent to the device will be rejected again.
    *
    * See also "AP support for powersaving clients" in mac80211.h.
    */
   
   /**
    * enum iwl_mvm_agg_state
    *
    * The state machine of the BA agreement establishment / tear down.
    * These states relate to a specific RA / TID.
    *
    * @IWL_AGG_OFF: aggregation is not used
    * @IWL_AGG_QUEUED: aggregation start work has been queued
    * @IWL_AGG_STARTING: aggregation are starting (between start and oper)
    * @IWL_AGG_ON: aggregation session is up
    * @IWL_EMPTYING_HW_QUEUE_ADDBA: establishing a BA session - waiting for the
    *      HW queue to be empty from packets for this RA /TID.
    * @IWL_EMPTYING_HW_QUEUE_DELBA: tearing down a BA session - waiting for the
    *      HW queue to be empty from packets for this RA /TID.
    */
   enum iwl_mvm_agg_state {
           IWL_AGG_OFF = 0,
           IWL_AGG_QUEUED,
           IWL_AGG_STARTING,
           IWL_AGG_ON,
           IWL_EMPTYING_HW_QUEUE_ADDBA,
           IWL_EMPTYING_HW_QUEUE_DELBA,
   };
   
   /**
    * struct iwl_mvm_tid_data - holds the states for each RA / TID
    * @seq_number: the next WiFi sequence number to use
    * @next_reclaimed: the WiFi sequence number of the next packet to be acked.
    *      This is basically (last acked packet++).
    * @rate_n_flags: Rate at which Tx was attempted. Holds the data between the
    *      Tx response (TX_CMD), and the block ack notification (COMPRESSED_BA).
    * @lq_color: the color of the LQ command as it appears in tx response.
    * @amsdu_in_ampdu_allowed: true if A-MSDU in A-MPDU is allowed.
    * @state: state of the BA agreement establishment / tear down.
    * @txq_id: Tx queue used by the BA session / DQA
    * @ssn: the first packet to be sent in AGG HW queue in Tx AGG start flow, or
    *      the first packet to be sent in legacy HW queue in Tx AGG stop flow.
    *      Basically when next_reclaimed reaches ssn, we can tell mac80211 that
    *      we are ready to finish the Tx AGG stop / start flow.
    * @tx_time: medium time consumed by this A-MPDU
    * @tpt_meas_start: time of the throughput measurements start, is reset every HZ
    * @tx_count_last: number of frames transmitted during the last second
    * @tx_count: counts the number of frames transmitted since the last reset of
    *       tpt_meas_start
    */
   struct iwl_mvm_tid_data {
           u16 seq_number;
           u16 next_reclaimed;
           /* The rest is Tx AGG related */
           u32 rate_n_flags;
           u8 lq_color;
           bool amsdu_in_ampdu_allowed;
           enum iwl_mvm_agg_state state;
           u16 txq_id;
           u16 ssn;
           u16 tx_time;
           unsigned long tpt_meas_start;
           u32 tx_count_last;
           u32 tx_count;
   };
   
   struct iwl_mvm_key_pn {
           struct rcu_head rcu_head;
           struct {
                   u8 pn[IWL_MAX_TID_COUNT][IEEE80211_CCMP_PN_LEN];
           } ____cacheline_aligned_in_smp q[];
   };
   
   /**
    * enum iwl_mvm_rxq_notif_type - Internal message identifier
    *
    * @IWL_MVM_RXQ_EMPTY: empty sync notification
    * @IWL_MVM_RXQ_NOTIF_DEL_BA: notify RSS queues of delBA
    * @IWL_MVM_RXQ_NSSN_SYNC: notify all the RSS queues with the new NSSN
    */
   enum iwl_mvm_rxq_notif_type {
           IWL_MVM_RXQ_EMPTY,
           IWL_MVM_RXQ_NOTIF_DEL_BA,
           IWL_MVM_RXQ_NSSN_SYNC,
   };
   
   /**
    * struct iwl_mvm_internal_rxq_notif - Internal representation of the data sent
    * in &iwl_rxq_sync_cmd. Should be DWORD aligned.
    * FW is agnostic to the payload, so there are no endianity requirements.
    *
    * @type: value from &iwl_mvm_rxq_notif_type
    * @sync: ctrl path is waiting for all notifications to be received
    * @cookie: internal cookie to identify old notifications
    * @data: payload
    */
   struct iwl_mvm_internal_rxq_notif {
           u16 type;
           u16 sync;
           u32 cookie;
           u8 data[];
   } __packed;
   
   struct iwl_mvm_delba_data {
           u32 baid;
   } __packed;
   
   struct iwl_mvm_nssn_sync_data {
           u32 baid;
           u32 nssn;
   } __packed;
   
   /**
    * struct iwl_mvm_rxq_dup_data - per station per rx queue data
    * @last_seq: last sequence per tid for duplicate packet detection
    * @last_sub_frame: last subframe packet
    */
   struct iwl_mvm_rxq_dup_data {
           __le16 last_seq[IWL_MAX_TID_COUNT + 1];
           u8 last_sub_frame[IWL_MAX_TID_COUNT + 1];
   } ____cacheline_aligned_in_smp;
   
   /**
    * struct iwl_mvm_sta - representation of a station in the driver
    * @sta_id: the index of the station in the fw (will be replaced by id_n_color)
    * @tfd_queue_msk: the tfd queues used by the station
    * @mac_id_n_color: the MAC context this station is linked to
    * @tid_disable_agg: bitmap: if bit(tid) is set, the fw won't send ampdus for
    *      tid.
    * @max_agg_bufsize: the maximal size of the AGG buffer for this station
    * @sta_type: station type
    * @sta_state: station state according to enum %ieee80211_sta_state
    * @bt_reduced_txpower: is reduced tx power enabled for this station
    * @next_status_eosp: the next reclaimed packet is a PS-Poll response and
    *      we need to signal the EOSP
    * @lock: lock to protect the whole struct. Since %tid_data is access from Tx
    * and from Tx response flow, it needs a spinlock.
    * @tid_data: per tid data + mgmt. Look at %iwl_mvm_tid_data.
    * @tid_to_baid: a simple map of TID to baid
    * @lq_sta: holds rate scaling data, either for the case when RS is done in
    *      the driver - %rs_drv or in the FW - %rs_fw.
    * @reserved_queue: the queue reserved for this STA for DQA purposes
    *      Every STA has is given one reserved queue to allow it to operate. If no
    *      such queue can be guaranteed, the STA addition will fail.
    * @tx_protection: reference counter for controlling the Tx protection.
    * @tt_tx_protection: is thermal throttling enable Tx protection?
    * @disable_tx: is tx to this STA disabled?
    * @amsdu_enabled: bitmap of TX AMSDU allowed TIDs.
    *      In case TLC offload is not active it is either 0xFFFF or 0.
    * @max_amsdu_len: max AMSDU length
    * @orig_amsdu_len: used to save the original amsdu_len when it is changed via
    *      debugfs.  If it's set to 0, it means that it is it's not set via
    *      debugfs.
    * @agg_tids: bitmap of tids whose status is operational aggregated (IWL_AGG_ON)
    * @sleep_tx_count: the number of frames that we told the firmware to let out
    *      even when that station is asleep. This is useful in case the queue
    *      gets empty before all the frames were sent, which can happen when
    *      we are sending frames from an AMPDU queue and there was a hole in
    *      the BA window. To be used for UAPSD only.
    * @ptk_pn: per-queue PTK PN data structures
    * @dup_data: per queue duplicate packet detection data
    * @deferred_traffic_tid_map: indication bitmap of deferred traffic per-TID
    * @tx_ant: the index of the antenna to use for data tx to this station. Only
    *      used during connection establishment (e.g. for the 4 way handshake
    *      exchange).
    * @pairwise_cipher: used to feed iwlmei upon authorization
    *
    * When mac80211 creates a station it reserves some space (hw->sta_data_size)
    * in the structure for use by driver. This structure is placed in that
    * space.
    *
    */
   struct iwl_mvm_sta {
           u32 sta_id;
           u32 tfd_queue_msk;
           u32 mac_id_n_color;
           u16 tid_disable_agg;
           u16 max_agg_bufsize;
           enum iwl_sta_type sta_type;
           enum ieee80211_sta_state sta_state;
           bool bt_reduced_txpower;
           bool next_status_eosp;
           spinlock_t lock;
           struct iwl_mvm_tid_data tid_data[IWL_MAX_TID_COUNT + 1];
           u8 tid_to_baid[IWL_MAX_TID_COUNT];
           union {
                   struct iwl_lq_sta_rs_fw rs_fw;
                   struct iwl_lq_sta rs_drv;
           } lq_sta;
           struct ieee80211_vif *vif;
           struct iwl_mvm_key_pn __rcu *ptk_pn[4];
           struct iwl_mvm_rxq_dup_data *dup_data;
   
           u8 reserved_queue;
   
           /* Temporary, until the new TLC will control the Tx protection */
           s8 tx_protection;
           bool tt_tx_protection;
   
           bool disable_tx;
           u16 amsdu_enabled;
           u16 max_amsdu_len;
           u16 orig_amsdu_len;
           bool sleeping;
           u8 agg_tids;
           u8 sleep_tx_count;
           u8 avg_energy;
           u8 tx_ant;
           u32 pairwise_cipher;
   };
   
   u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data);
   
   static inline struct iwl_mvm_sta *
   iwl_mvm_sta_from_mac80211(struct ieee80211_sta *sta)
   {
           return (void *)sta->drv_priv;
   }
   
   /**
    * struct iwl_mvm_int_sta - representation of an internal station (auxiliary or
    * broadcast)
    * @sta_id: the index of the station in the fw (will be replaced by id_n_color)
    * @type: station type
    * @tfd_queue_msk: the tfd queues used by the station
    */
   struct iwl_mvm_int_sta {
           u32 sta_id;
           enum iwl_sta_type type;
           u32 tfd_queue_msk;
   };
   
   /**
    * Send the STA info to the FW.
    *
    * @mvm: the iwl_mvm* to use
    * @sta: the STA
    * @update: this is true if the FW is being updated about a STA it already knows
    *      about. Otherwise (if this is a new STA), this should be false.
    * @flags: if update==true, this marks what is being changed via ORs of values
    *      from enum iwl_sta_modify_flag. Otherwise, this is ignored.
    */
   int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
                              bool update, unsigned int flags);
   int iwl_mvm_add_sta(struct iwl_mvm *mvm,
                       struct ieee80211_vif *vif,
                       struct ieee80211_sta *sta);
   
   static inline int iwl_mvm_update_sta(struct iwl_mvm *mvm,
                                        struct ieee80211_vif *vif,
                                        struct ieee80211_sta *sta)
   {
           return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
   }
   
   int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
                                     struct iwl_mvm_sta *mvm_sta);
   int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
                      struct ieee80211_vif *vif,
                      struct ieee80211_sta *sta);
   int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
                         struct ieee80211_vif *vif,
                         u8 sta_id);
   int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
                           struct ieee80211_vif *vif,
                           struct ieee80211_sta *sta,
                           struct ieee80211_key_conf *keyconf,
                           u8 key_offset);
   int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
                              struct ieee80211_vif *vif,
                              struct ieee80211_sta *sta,
                              struct ieee80211_key_conf *keyconf);
   
   void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
                                struct ieee80211_vif *vif,
                                struct ieee80211_key_conf *keyconf,
                                struct ieee80211_sta *sta, u32 iv32,
                                u16 *phase1key);
   
   void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
                              struct iwl_rx_cmd_buffer *rxb);
   
   /* AMPDU */
   int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
                          int tid, u16 ssn, bool start, u16 buf_size, u16 timeout);
   int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                           struct ieee80211_sta *sta, u16 tid, u16 *ssn);
   int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                               struct ieee80211_sta *sta, u16 tid, u16 buf_size,
                               bool amsdu);
   int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                               struct ieee80211_sta *sta, u16 tid);
   int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                               struct ieee80211_sta *sta, u16 tid);
   
   int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
                          int tid, u8 queue, bool start);
   
   int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id);
   int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm);
   
   int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
                                struct iwl_mvm_int_sta *sta,
                                       u32 qmask, enum nl80211_iftype iftype,
                                       enum iwl_sta_type type);
   void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta);
   int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm);
   
   void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
                                   struct ieee80211_sta *sta);
   void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
                                          struct ieee80211_sta *sta,
                                          enum ieee80211_frame_release_type reason,
                                          u16 cnt, u16 tids, bool more_data,
                                          bool single_sta_queue);
   int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
                         bool drain);
   void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
                                      struct iwl_mvm_sta *mvmsta, bool disable);
   void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
                                         struct ieee80211_sta *sta,
                                         bool disable);
   void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
                                          struct iwl_mvm_vif *mvmvif,
                                          bool disable);
   void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
   void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk);
   int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                            struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
                            u8 *key, u32 key_len);
   void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm,
                                      struct ieee80211_vif *vif,
                                      u32 mac_id);
   #endif /* __sta_h__ */

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