// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
 * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 * Copyright (C) 2015-2017      Intel Deutschland GmbH
 * Copyright (C) 2018-2026 Intel Corporation
 *
 * utilities for mac80211
 */

#include <net/mac80211.h>
#include <linux/netdevice.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/bitmap.h>
#include <linux/crc32.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include <kunit/visibility.h>

#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "mesh.h"
#include "wme.h"
#include "led.h"
#include "wep.h"

/* privid for wiphys to determine whether they belong to us or not */
const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;

struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
{
        struct ieee80211_local *local;

        local = wiphy_priv(wiphy);
        return &local->hw;
}
EXPORT_SYMBOL(wiphy_to_ieee80211_hw);

const struct ieee80211_conn_settings ieee80211_conn_settings_unlimited = {
        .mode = IEEE80211_CONN_MODE_EHT,
        .bw_limit = IEEE80211_CONN_BW_LIMIT_320,
};

u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
                        enum nl80211_iftype type)
{
        __le16 fc = hdr->frame_control;

        if (ieee80211_is_data(fc)) {
                if (len < 24) /* drop incorrect hdr len (data) */
                        return NULL;

                if (ieee80211_has_a4(fc))
                        return NULL;
                if (ieee80211_has_tods(fc))
                        return hdr->addr1;
                if (ieee80211_has_fromds(fc))
                        return hdr->addr2;

                return hdr->addr3;
        }

        if (ieee80211_is_s1g_beacon(fc)) {
                struct ieee80211_ext *ext = (void *) hdr;

                return ext->u.s1g_beacon.sa;
        }

        if (ieee80211_is_mgmt(fc)) {
                if (len < 24) /* drop incorrect hdr len (mgmt) */
                        return NULL;
                return hdr->addr3;
        }

        if (ieee80211_is_ctl(fc)) {
                if (ieee80211_is_pspoll(fc))
                        return hdr->addr1;

                if (ieee80211_is_back_req(fc)) {
                        switch (type) {
                        case NL80211_IFTYPE_STATION:
                                return hdr->addr2;
                        case NL80211_IFTYPE_AP:
                        case NL80211_IFTYPE_AP_VLAN:
                                return hdr->addr1;
                        default:
                                break; /* fall through to the return */
                        }
                }
        }

        return NULL;
}

void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
{
        struct sk_buff *skb;
        struct ieee80211_hdr *hdr;

        skb_queue_walk(&tx->skbs, skb) {
                hdr = (struct ieee80211_hdr *) skb->data;
                hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
        }
}

int ieee80211_frame_duration(enum nl80211_band band, size_t len,
                             int rate, int erp, int short_preamble)
{
        int dur;

        /* calculate duration (in microseconds, rounded up to next higher
         * integer if it includes a fractional microsecond) to send frame of
         * len bytes (does not include FCS) at the given rate. Duration will
         * also include SIFS.
         *
         * rate is in 100 kbps, so divident is multiplied by 10 in the
         * DIV_ROUND_UP() operations.
         */

        if (band == NL80211_BAND_5GHZ || erp) {
                /*
                 * OFDM:
                 *
                 * N_DBPS = DATARATE x 4
                 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
                 *      (16 = SIGNAL time, 6 = tail bits)
                 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
                 *
                 * T_SYM = 4 usec
                 * 802.11a - 18.5.2: aSIFSTime = 16 usec
                 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
                 *      signal ext = 6 usec
                 */
                dur = 16; /* SIFS + signal ext */
                dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
                dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */

                /* rates should already consider the channel bandwidth,
                 * don't apply divisor again.
                 */
                dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
                                        4 * rate); /* T_SYM x N_SYM */
        } else {
                /*
                 * 802.11b or 802.11g with 802.11b compatibility:
                 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
                 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
                 *
                 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
                 * aSIFSTime = 10 usec
                 * aPreambleLength = 144 usec or 72 usec with short preamble
                 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
                 */
                dur = 10; /* aSIFSTime = 10 usec */
                dur += short_preamble ? (72 + 24) : (144 + 48);

                dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
        }

        return dur;
}

/* Exported duration function for driver use */
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
                                        struct ieee80211_vif *vif,
                                        enum nl80211_band band,
                                        size_t frame_len,
                                        struct ieee80211_rate *rate)
{
        struct ieee80211_sub_if_data *sdata;
        u16 dur;
        int erp;
        bool short_preamble = false;

        erp = 0;
        if (vif) {
                sdata = vif_to_sdata(vif);
                short_preamble = sdata->vif.bss_conf.use_short_preamble;
                if (sdata->deflink.operating_11g_mode)
                        erp = rate->flags & IEEE80211_RATE_ERP_G;
        }

        dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
                                       short_preamble);

        return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_generic_frame_duration);

__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
                              struct ieee80211_vif *vif, size_t frame_len,
                              const struct ieee80211_tx_info *frame_txctl)
{
        struct ieee80211_local *local = hw_to_local(hw);
        struct ieee80211_rate *rate;
        struct ieee80211_sub_if_data *sdata;
        bool short_preamble;
        int erp, bitrate;
        u16 dur;
        struct ieee80211_supported_band *sband;

        sband = local->hw.wiphy->bands[frame_txctl->band];

        short_preamble = false;

        rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];

        erp = 0;
        if (vif) {
                sdata = vif_to_sdata(vif);
                short_preamble = sdata->vif.bss_conf.use_short_preamble;
                if (sdata->deflink.operating_11g_mode)
                        erp = rate->flags & IEEE80211_RATE_ERP_G;
        }

        bitrate = rate->bitrate;

        /* CTS duration */
        dur = ieee80211_frame_duration(sband->band, 10, bitrate,
                                       erp, short_preamble);
        /* Data frame duration */
        dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
                                        erp, short_preamble);
        /* ACK duration */
        dur += ieee80211_frame_duration(sband->band, 10, bitrate,
                                        erp, short_preamble);

        return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_rts_duration);

__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
                                    struct ieee80211_vif *vif,
                                    size_t frame_len,
                                    const struct ieee80211_tx_info *frame_txctl)
{
        struct ieee80211_local *local = hw_to_local(hw);
        struct ieee80211_rate *rate;
        struct ieee80211_sub_if_data *sdata;
        bool short_preamble;
        int erp, bitrate;
        u16 dur;
        struct ieee80211_supported_band *sband;

        sband = local->hw.wiphy->bands[frame_txctl->band];

        short_preamble = false;

        rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
        erp = 0;
        if (vif) {
                sdata = vif_to_sdata(vif);
                short_preamble = sdata->vif.bss_conf.use_short_preamble;
                if (sdata->deflink.operating_11g_mode)
                        erp = rate->flags & IEEE80211_RATE_ERP_G;
        }

        bitrate = rate->bitrate;

        /* Data frame duration */
        dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
                                       erp, short_preamble);
        if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
                /* ACK duration */
                dur += ieee80211_frame_duration(sband->band, 10, bitrate,
                                                erp, short_preamble);
        }

        return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_ctstoself_duration);

static void wake_tx_push_queue(struct ieee80211_local *local,
                               struct ieee80211_sub_if_data *sdata,
                               struct ieee80211_txq *queue)
{
        struct ieee80211_tx_control control = {
                .sta = queue->sta,
        };
        struct sk_buff *skb;

        while (1) {
                skb = ieee80211_tx_dequeue(&local->hw, queue);
                if (!skb)
                        break;

                drv_tx(local, &control, skb);
        }
}

/* wake_tx_queue handler for driver not implementing a custom one*/
void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
                                    struct ieee80211_txq *txq)
{
        struct ieee80211_local *local = hw_to_local(hw);
        struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
        struct ieee80211_txq *queue;

        spin_lock(&local->handle_wake_tx_queue_lock);

        /* Use ieee80211_next_txq() for airtime fairness accounting */
        ieee80211_txq_schedule_start(hw, txq->ac);
        while ((queue = ieee80211_next_txq(hw, txq->ac))) {
                wake_tx_push_queue(local, sdata, queue);
                ieee80211_return_txq(hw, queue, false);
        }
        ieee80211_txq_schedule_end(hw, txq->ac);
        spin_unlock(&local->handle_wake_tx_queue_lock);
}
EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue);

static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
{
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_vif *vif = &sdata->vif;
        struct fq *fq = &local->fq;
        struct ps_data *ps = NULL;
        struct txq_info *txqi;
        struct sta_info *sta;
        int i;

        local_bh_disable();
        spin_lock(&fq->lock);

        if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
                goto out;

        if (sdata->vif.type == NL80211_IFTYPE_AP)
                ps = &sdata->bss->ps;

        list_for_each_entry_rcu(sta, &local->sta_list, list) {
                if (sdata != sta->sdata)
                        continue;

                for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
                        struct ieee80211_txq *txq = sta->sta.txq[i];

                        if (!txq)
                                continue;

                        txqi = to_txq_info(txq);

                        if (ac != txq->ac)
                                continue;

                        if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY,
                                                &txqi->flags))
                                continue;

                        spin_unlock(&fq->lock);
                        drv_wake_tx_queue(local, txqi);
                        spin_lock(&fq->lock);
                }
        }

        if (!vif->txq)
                goto out;

        txqi = to_txq_info(vif->txq);

        if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) ||
            (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
                goto out;

        spin_unlock(&fq->lock);

        drv_wake_tx_queue(local, txqi);
        local_bh_enable();
        return;
out:
        spin_unlock(&fq->lock);
        local_bh_enable();
}

static void
__releases(&local->queue_stop_reason_lock)
__acquires(&local->queue_stop_reason_lock)
_ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
{
        struct ieee80211_sub_if_data *sdata;
        int n_acs = IEEE80211_NUM_ACS;
        int i;

        rcu_read_lock();

        if (local->hw.queues < IEEE80211_NUM_ACS)
                n_acs = 1;

        for (i = 0; i < local->hw.queues; i++) {
                if (local->queue_stop_reasons[i])
                        continue;

                spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
                list_for_each_entry_rcu(sdata, &local->interfaces, list) {
                        int ac;

                        for (ac = 0; ac < n_acs; ac++) {
                                int ac_queue = sdata->vif.hw_queue[ac];

                                if (ac_queue == i ||
                                    sdata->vif.cab_queue == i)
                                        __ieee80211_wake_txqs(sdata, ac);
                        }
                }
                spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
        }

        rcu_read_unlock();
}

void ieee80211_wake_txqs(struct tasklet_struct *t)
{
        struct ieee80211_local *local = from_tasklet(local, t,
                                                     wake_txqs_tasklet);
        unsigned long flags;

        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
        _ieee80211_wake_txqs(local, &flags);
        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
                                   enum queue_stop_reason reason,
                                   bool refcounted,
                                   unsigned long *flags)
{
        struct ieee80211_local *local = hw_to_local(hw);

        if (WARN_ON(queue >= hw->queues))
                return;

        if (!test_bit(reason, &local->queue_stop_reasons[queue]))
                return;

        if (!refcounted) {
                local->q_stop_reasons[queue][reason] = 0;
        } else {
                local->q_stop_reasons[queue][reason]--;
                if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
                        local->q_stop_reasons[queue][reason] = 0;
        }

        if (local->q_stop_reasons[queue][reason] == 0)
                __clear_bit(reason, &local->queue_stop_reasons[queue]);

        trace_wake_queue(local, queue, reason,
                         local->q_stop_reasons[queue][reason]);

        if (local->queue_stop_reasons[queue] != 0)
                /* someone still has this queue stopped */
                return;

        if (!skb_queue_empty(&local->pending[queue]))
                tasklet_schedule(&local->tx_pending_tasklet);

        /*
         * Calling _ieee80211_wake_txqs here can be a problem because it may
         * release queue_stop_reason_lock which has been taken by
         * __ieee80211_wake_queue's caller. It is certainly not very nice to
         * release someone's lock, but it is fine because all the callers of
         * __ieee80211_wake_queue call it right before releasing the lock.
         */
        if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
                tasklet_schedule(&local->wake_txqs_tasklet);
        else
                _ieee80211_wake_txqs(local, flags);
}

void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
                                    enum queue_stop_reason reason,
                                    bool refcounted)
{
        struct ieee80211_local *local = hw_to_local(hw);
        unsigned long flags;

        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
        __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
{
        ieee80211_wake_queue_by_reason(hw, queue,
                                       IEEE80211_QUEUE_STOP_REASON_DRIVER,
                                       false);
}
EXPORT_SYMBOL(ieee80211_wake_queue);

static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
                                   enum queue_stop_reason reason,
                                   bool refcounted)
{
        struct ieee80211_local *local = hw_to_local(hw);

        if (WARN_ON(queue >= hw->queues))
                return;

        if (!refcounted)
                local->q_stop_reasons[queue][reason] = 1;
        else
                local->q_stop_reasons[queue][reason]++;

        trace_stop_queue(local, queue, reason,
                         local->q_stop_reasons[queue][reason]);

        set_bit(reason, &local->queue_stop_reasons[queue]);
}

void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
                                    enum queue_stop_reason reason,
                                    bool refcounted)
{
        struct ieee80211_local *local = hw_to_local(hw);
        unsigned long flags;

        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
        __ieee80211_stop_queue(hw, queue, reason, refcounted);
        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
{
        ieee80211_stop_queue_by_reason(hw, queue,
                                       IEEE80211_QUEUE_STOP_REASON_DRIVER,
                                       false);
}
EXPORT_SYMBOL(ieee80211_stop_queue);

void ieee80211_add_pending_skb(struct ieee80211_local *local,
                               struct sk_buff *skb)
{
        struct ieee80211_hw *hw = &local->hw;
        unsigned long flags;
        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
        int queue = info->hw_queue;

        if (WARN_ON(!info->control.vif)) {
                ieee80211_free_txskb(&local->hw, skb);
                return;
        }

        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
        __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
                               false);
        __skb_queue_tail(&local->pending[queue], skb);
        __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
                               false, &flags);
        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_add_pending_skbs(struct ieee80211_local *local,
                                struct sk_buff_head *skbs)
{
        struct ieee80211_hw *hw = &local->hw;
        struct sk_buff *skb;
        unsigned long flags;
        int queue, i;

        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
        while ((skb = skb_dequeue(skbs))) {
                struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

                if (WARN_ON(!info->control.vif)) {
                        ieee80211_free_txskb(&local->hw, skb);
                        continue;
                }

                queue = info->hw_queue;

                __ieee80211_stop_queue(hw, queue,
                                IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
                                false);

                __skb_queue_tail(&local->pending[queue], skb);
        }

        for (i = 0; i < hw->queues; i++)
                __ieee80211_wake_queue(hw, i,
                        IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
                        false, &flags);
        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
                                     unsigned long queues,
                                     enum queue_stop_reason reason,
                                     bool refcounted)
{
        struct ieee80211_local *local = hw_to_local(hw);
        unsigned long flags;
        int i;

        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);

        for_each_set_bit(i, &queues, hw->queues)
                __ieee80211_stop_queue(hw, i, reason, refcounted);

        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_stop_queues(struct ieee80211_hw *hw)
{
        ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
                                        false);
}
EXPORT_SYMBOL(ieee80211_stop_queues);

int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
{
        struct ieee80211_local *local = hw_to_local(hw);
        unsigned long flags;
        int ret;

        if (WARN_ON(queue >= hw->queues))
                return true;

        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
        ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
                       &local->queue_stop_reasons[queue]);
        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
        return ret;
}
EXPORT_SYMBOL(ieee80211_queue_stopped);

void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
                                     unsigned long queues,
                                     enum queue_stop_reason reason,
                                     bool refcounted)
{
        struct ieee80211_local *local = hw_to_local(hw);
        unsigned long flags;
        int i;

        spin_lock_irqsave(&local->queue_stop_reason_lock, flags);

        for_each_set_bit(i, &queues, hw->queues)
                __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);

        spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_wake_queues(struct ieee80211_hw *hw)
{
        ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
                                        false);
}
EXPORT_SYMBOL(ieee80211_wake_queues);

unsigned int
ieee80211_get_vif_queues(struct ieee80211_local *local,
                         struct ieee80211_sub_if_data *sdata)
{
        unsigned int queues;

        if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
                int ac;

                queues = 0;

                for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
                        if (sdata->vif.hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
                                queues |= BIT(sdata->vif.hw_queue[ac]);
                if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
                        queues |= BIT(sdata->vif.cab_queue);
        } else {
                /* all queues */
                queues = BIT(local->hw.queues) - 1;
        }

        return queues;
}

void __ieee80211_flush_queues(struct ieee80211_local *local,
                              struct ieee80211_sub_if_data *sdata,
                              unsigned int queues, bool drop)
{
        if (!local->ops->flush && !drop)
                return;

        /*
         * If no queue was set, or if the HW doesn't support
         * IEEE80211_HW_QUEUE_CONTROL - flush all queues
         */
        if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
                queues = ieee80211_get_vif_queues(local, sdata);

        ieee80211_stop_queues_by_reason(&local->hw, queues,
                                        IEEE80211_QUEUE_STOP_REASON_FLUSH,
                                        false);

        if (drop) {
                struct sta_info *sta;

                /* Purge the queues, so the frames on them won't be
                 * sent during __ieee80211_wake_queue()
                 */
                list_for_each_entry(sta, &local->sta_list, list) {
                        if (sdata != sta->sdata)
                                continue;
                        ieee80211_purge_sta_txqs(sta);
                }
        }

        if (local->ops->flush)
                drv_flush(local, sdata, queues, drop);

        ieee80211_wake_queues_by_reason(&local->hw, queues,
                                        IEEE80211_QUEUE_STOP_REASON_FLUSH,
                                        false);
}

void ieee80211_flush_queues(struct ieee80211_local *local,
                            struct ieee80211_sub_if_data *sdata, bool drop)
{
        __ieee80211_flush_queues(local, sdata, 0, drop);
}

static void __iterate_interfaces(struct ieee80211_local *local,
                                 u32 iter_flags,
                                 void (*iterator)(void *data, u8 *mac,
                                                  struct ieee80211_vif *vif),
                                 void *data)
{
        struct ieee80211_sub_if_data *sdata;
        bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;

        list_for_each_entry_rcu(sdata, &local->interfaces, list,
                                lockdep_is_held(&local->iflist_mtx) ||
                                lockdep_is_held(&local->hw.wiphy->mtx)) {
                switch (sdata->vif.type) {
                case NL80211_IFTYPE_MONITOR:
                        if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
                            !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
                                continue;
                        break;
                case NL80211_IFTYPE_AP_VLAN:
                        continue;
                default:
                        break;
                }
                if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
                    active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
                        continue;
                if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
                    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
                        continue;
                if (ieee80211_sdata_running(sdata) || !active_only)
                        iterator(data, sdata->vif.addr,
                                 &sdata->vif);
        }

        sdata = rcu_dereference_check(local->monitor_sdata,
                                      lockdep_is_held(&local->iflist_mtx) ||
                                      lockdep_is_held(&local->hw.wiphy->mtx));
        if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
            (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
             sdata->flags & IEEE80211_SDATA_IN_DRIVER))
                iterator(data, sdata->vif.addr, &sdata->vif);
}

void ieee80211_iterate_interfaces(
        struct ieee80211_hw *hw, u32 iter_flags,
        void (*iterator)(void *data, u8 *mac,
                         struct ieee80211_vif *vif),
        void *data)
{
        struct ieee80211_local *local = hw_to_local(hw);

        mutex_lock(&local->iflist_mtx);
        __iterate_interfaces(local, iter_flags, iterator, data);
        mutex_unlock(&local->iflist_mtx);
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);

void ieee80211_iterate_active_interfaces_atomic(
        struct ieee80211_hw *hw, u32 iter_flags,
        void (*iterator)(void *data, u8 *mac,
                         struct ieee80211_vif *vif),
        void *data)
{
        struct ieee80211_local *local = hw_to_local(hw);

        rcu_read_lock();
        __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
                             iterator, data);
        rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);

struct ieee80211_vif *
__ieee80211_iterate_interfaces(struct ieee80211_hw *hw,
                               struct ieee80211_vif *prev,
                               u32 iter_flags)
{
        bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
        struct ieee80211_sub_if_data *sdata = NULL, *monitor;
        struct ieee80211_local *local = hw_to_local(hw);

        lockdep_assert_wiphy(hw->wiphy);

        if (prev)
                sdata = vif_to_sdata(prev);

        monitor = rcu_dereference_check(local->monitor_sdata,
                                        lockdep_is_held(&hw->wiphy->mtx));
        if (monitor && monitor == sdata)
                return NULL;

        sdata = list_prepare_entry(sdata, &local->interfaces, list);
        list_for_each_entry_continue(sdata, &local->interfaces, list) {
                switch (sdata->vif.type) {
                case NL80211_IFTYPE_MONITOR:
                        if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
                            !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
                                continue;
                        break;
                case NL80211_IFTYPE_AP_VLAN:
                        continue;
                default:
                        break;
                }
                if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
                    active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
                        continue;
                if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
                    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
                        continue;
                if (ieee80211_sdata_running(sdata) || !active_only)
                        return &sdata->vif;
        }

        if (monitor && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
            (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
             monitor->flags & IEEE80211_SDATA_IN_DRIVER))
                return &monitor->vif;

        return NULL;
}
EXPORT_SYMBOL_GPL(__ieee80211_iterate_interfaces);

static void __iterate_stations(struct ieee80211_local *local,
                               void (*iterator)(void *data,
                                                struct ieee80211_sta *sta),
                               void *data)
{
        struct sta_info *sta;

        list_for_each_entry_rcu(sta, &local->sta_list, list,
                                lockdep_is_held(&local->hw.wiphy->mtx)) {
                if (!sta->uploaded)
                        continue;

                iterator(data, &sta->sta);
        }
}

void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
                        void (*iterator)(void *data,
                                         struct ieee80211_sta *sta),
                        void *data)
{
        struct ieee80211_local *local = hw_to_local(hw);

        rcu_read_lock();
        __iterate_stations(local, iterator, data);
        rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);

struct ieee80211_sta *
__ieee80211_iterate_stations(struct ieee80211_hw *hw,
                             struct ieee80211_sta *prev)
{
        struct ieee80211_local *local = hw_to_local(hw);
        struct sta_info *sta = NULL;

        lockdep_assert_wiphy(local->hw.wiphy);

        if (prev)
                sta = container_of(prev, struct sta_info, sta);

        sta = list_prepare_entry(sta, &local->sta_list, list);
        list_for_each_entry_continue(sta, &local->sta_list, list) {
                if (!sta->uploaded)
                        continue;

                return &sta->sta;
        }

        return NULL;
}
EXPORT_SYMBOL_GPL(__ieee80211_iterate_stations);

struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
{
        struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);

        if (!ieee80211_sdata_running(sdata) ||
            !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
                return NULL;
        return &sdata->vif;
}
EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);

struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
{
        if (!vif)
                return NULL;

        return &vif_to_sdata(vif)->wdev;
}
EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);

/*
 * Nothing should have been stuffed into the workqueue during
 * the suspend->resume cycle. Since we can't check each caller
 * of this function if we are already quiescing / suspended,
 * check here and don't WARN since this can actually happen when
 * the rx path (for example) is racing against __ieee80211_suspend
 * and suspending / quiescing was set after the rx path checked
 * them.
 */
static bool ieee80211_can_queue_work(struct ieee80211_local *local)
{
        if (local->quiescing || (local->suspended && !local->resuming)) {
                pr_warn("queueing ieee80211 work while going to suspend\n");
                return false;
        }

        return true;
}

void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
{
        struct ieee80211_local *local = hw_to_local(hw);

        if (!ieee80211_can_queue_work(local))
                return;

        queue_work(local->workqueue, work);
}
EXPORT_SYMBOL(ieee80211_queue_work);

void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
                                  struct delayed_work *dwork,
                                  unsigned long delay)
{
        struct ieee80211_local *local = hw_to_local(hw);

        if (!ieee80211_can_queue_work(local))
                return;

        queue_delayed_work(local->workqueue, dwork, delay);
}
EXPORT_SYMBOL(ieee80211_queue_delayed_work);

void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
                                           struct ieee80211_tx_queue_params
                                           *qparam, int ac)
{
        struct ieee80211_chanctx_conf *chanctx_conf;
        const struct ieee80211_reg_rule *rrule;
        const struct ieee80211_wmm_ac *wmm_ac;
        u16 center_freq = 0;

        if (sdata->vif.type != NL80211_IFTYPE_AP &&
            sdata->vif.type != NL80211_IFTYPE_STATION)
                return;

        rcu_read_lock();
        chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
        if (chanctx_conf)
                center_freq = chanctx_conf->def.chan->center_freq;

        if (!center_freq) {
                rcu_read_unlock();
                return;
        }

        rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));

        if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
                rcu_read_unlock();
                return;
        }

        if (sdata->vif.type == NL80211_IFTYPE_AP)
                wmm_ac = &rrule->wmm_rule.ap[ac];
        else
                wmm_ac = &rrule->wmm_rule.client[ac];
        qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
        qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
        qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
        qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
        rcu_read_unlock();
}

void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
                               bool bss_notify, bool enable_qos)
{
        struct ieee80211_sub_if_data *sdata = link->sdata;
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_tx_queue_params qparam;
        struct ieee80211_chanctx_conf *chanctx_conf;
        int ac;
        bool use_11b;
        bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
        int aCWmin, aCWmax;

        if (!local->ops->conf_tx)
                return;

        if (local->hw.queues < IEEE80211_NUM_ACS)
                return;

        memset(&qparam, 0, sizeof(qparam));

        rcu_read_lock();
        chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
        use_11b = (chanctx_conf &&
                   chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
                 !link->operating_11g_mode;
        rcu_read_unlock();

        is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);

        /* Set defaults according to 802.11-2007 Table 7-37 */
        aCWmax = 1023;
        if (use_11b)
                aCWmin = 31;
        else
                aCWmin = 15;

        /* Configure old 802.11b/g medium access rules. */
        qparam.cw_max = aCWmax;
        qparam.cw_min = aCWmin;
        qparam.txop = 0;
        qparam.aifs = 2;

        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
                /* Update if QoS is enabled. */
                if (enable_qos) {
                        switch (ac) {
                        case IEEE80211_AC_BK:
                                qparam.cw_max = aCWmax;
                                qparam.cw_min = aCWmin;
                                qparam.txop = 0;
                                if (is_ocb)
                                        qparam.aifs = 9;
                                else
                                        qparam.aifs = 7;
                                break;
                        /* never happens but let's not leave undefined */
                        default:
                        case IEEE80211_AC_BE:
                                qparam.cw_max = aCWmax;
                                qparam.cw_min = aCWmin;
                                qparam.txop = 0;
                                if (is_ocb)
                                        qparam.aifs = 6;
                                else
                                        qparam.aifs = 3;
                                break;
                        case IEEE80211_AC_VI:
                                qparam.cw_max = aCWmin;
                                qparam.cw_min = (aCWmin + 1) / 2 - 1;
                                if (is_ocb)
                                        qparam.txop = 0;
                                else if (use_11b)
                                        qparam.txop = 6016/32;
                                else
                                        qparam.txop = 3008/32;

                                if (is_ocb)
                                        qparam.aifs = 3;
                                else
                                        qparam.aifs = 2;
                                break;
                        case IEEE80211_AC_VO:
                                qparam.cw_max = (aCWmin + 1) / 2 - 1;
                                qparam.cw_min = (aCWmin + 1) / 4 - 1;
                                if (is_ocb)
                                        qparam.txop = 0;
                                else if (use_11b)
                                        qparam.txop = 3264/32;
                                else
                                        qparam.txop = 1504/32;
                                qparam.aifs = 2;
                                break;
                        }
                }
                ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);

                qparam.uapsd = false;

                link->tx_conf[ac] = qparam;
                drv_conf_tx(local, link, ac, &qparam);
        }

        if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
            sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
            sdata->vif.type != NL80211_IFTYPE_NAN) {
                link->conf->qos = enable_qos;
                if (bss_notify)
                        ieee80211_link_info_change_notify(sdata, link,
                                                          BSS_CHANGED_QOS);
        }
}

void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
                         u16 transaction, u16 auth_alg, u16 status,
                         const u8 *extra, size_t extra_len, const u8 *da,
                         const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
                         u32 tx_flags)
{
        struct ieee80211_local *local = sdata->local;
        struct sk_buff *skb;
        struct ieee80211_mgmt *mgmt;
        bool multi_link = ieee80211_vif_is_mld(&sdata->vif);
        struct {
                u8 id;
                u8 len;
                u8 ext_id;
                struct ieee80211_multi_link_elem ml;
                struct ieee80211_mle_basic_common_info basic;
        } __packed mle = {
                .id = WLAN_EID_EXTENSION,
                .len = sizeof(mle) - 2,
                .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
                .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
                .basic.len = sizeof(mle.basic),
        };
        bool add_mle;
        int err;

        add_mle = (multi_link &&
                   !cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK,
                                           extra, extra_len));

        /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
        skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
                            24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
                            add_mle * sizeof(mle));
        if (!skb)
                return;

        skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);

        mgmt = skb_put_zero(skb, 24 + 6);
        mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
                                          IEEE80211_STYPE_AUTH);
        memcpy(mgmt->da, da, ETH_ALEN);
        memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
        memcpy(mgmt->bssid, bssid, ETH_ALEN);
        mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
        mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
        mgmt->u.auth.status_code = cpu_to_le16(status);
        if (extra)
                skb_put_data(skb, extra, extra_len);

        if (add_mle) {
                memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
                skb_put_data(skb, &mle, sizeof(mle));
        }

        if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
                mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
                err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
                if (WARN_ON(err)) {
                        kfree_skb(skb);
                        return;
                }
        }

        IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
                                        tx_flags;
        ieee80211_tx_skb(sdata, skb);
}

void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
                                    const u8 *da, const u8 *bssid,
                                    u16 stype, u16 reason,
                                    bool send_frame, u8 *frame_buf)
{
        struct ieee80211_local *local = sdata->local;
        struct sk_buff *skb;
        struct ieee80211_mgmt *mgmt = (void *)frame_buf;

        /* build frame */
        mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
        mgmt->duration = 0; /* initialize only */
        mgmt->seq_ctrl = 0; /* initialize only */
        memcpy(mgmt->da, da, ETH_ALEN);
        memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
        memcpy(mgmt->bssid, bssid, ETH_ALEN);
        /* u.deauth.reason_code == u.disassoc.reason_code */
        mgmt->u.deauth.reason_code = cpu_to_le16(reason);

        if (send_frame) {
                skb = dev_alloc_skb(local->hw.extra_tx_headroom +
                                    IEEE80211_DEAUTH_FRAME_LEN);
                if (!skb)
                        return;

                skb_reserve(skb, local->hw.extra_tx_headroom);

                /* copy in frame */
                skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);

                if (sdata->vif.type != NL80211_IFTYPE_STATION ||
                    !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
                        IEEE80211_SKB_CB(skb)->flags |=
                                IEEE80211_TX_INTFL_DONT_ENCRYPT;

                ieee80211_tx_skb(sdata, skb);
        }
}

static int ieee80211_put_s1g_cap(struct sk_buff *skb,
                                 struct ieee80211_sta_s1g_cap *s1g_cap)
{
        if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_s1g_cap))
                return -ENOBUFS;

        skb_put_u8(skb, WLAN_EID_S1G_CAPABILITIES);
        skb_put_u8(skb, sizeof(struct ieee80211_s1g_cap));

        skb_put_data(skb, &s1g_cap->cap, sizeof(s1g_cap->cap));
        skb_put_data(skb, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs));

        return 0;
}

static int ieee80211_put_preq_ies_band(struct sk_buff *skb,
                                       struct ieee80211_sub_if_data *sdata,
                                       const u8 *ie, size_t ie_len,
                                       size_t *offset,
                                       enum nl80211_band band,
                                       u32 rate_mask,
                                       struct cfg80211_chan_def *chandef,
                                       u32 flags)
{
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_supported_band *sband;
        int i, err;
        size_t noffset;
        bool have_80mhz = false;

        *offset = 0;

        sband = local->hw.wiphy->bands[band];
        if (WARN_ON_ONCE(!sband))
                return 0;

        /* For direct scan add S1G IE and consider its override bits */
        if (band == NL80211_BAND_S1GHZ)
                return ieee80211_put_s1g_cap(skb, &sband->s1g_cap);

        err = ieee80211_put_srates_elem(skb, sband, 0,
                                        ~rate_mask, WLAN_EID_SUPP_RATES);
        if (err)
                return err;

        /* insert "request information" if in custom IEs */
        if (ie && ie_len) {
                static const u8 before_extrates[] = {
                        WLAN_EID_SSID,
                        WLAN_EID_SUPP_RATES,
                        WLAN_EID_REQUEST,
                };
                noffset = ieee80211_ie_split(ie, ie_len,
                                             before_extrates,
                                             ARRAY_SIZE(before_extrates),
                                             *offset);
                if (skb_tailroom(skb) < noffset - *offset)
                        return -ENOBUFS;
                skb_put_data(skb, ie + *offset, noffset - *offset);
                *offset = noffset;
        }

        err = ieee80211_put_srates_elem(skb, sband, 0,
                                        ~rate_mask, WLAN_EID_EXT_SUPP_RATES);
        if (err)
                return err;

        if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
                if (skb_tailroom(skb) < 3)
                        return -ENOBUFS;
                skb_put_u8(skb, WLAN_EID_DS_PARAMS);
                skb_put_u8(skb, 1);
                skb_put_u8(skb,
                           ieee80211_frequency_to_channel(chandef->chan->center_freq));
        }

        if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
                return 0;

        /* insert custom IEs that go before HT */
        if (ie && ie_len) {
                static const u8 before_ht[] = {
                        /*
                         * no need to list the ones split off already
                         * (or generated here)
                         */
                        WLAN_EID_DS_PARAMS,
                        WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
                };
                noffset = ieee80211_ie_split(ie, ie_len,
                                             before_ht, ARRAY_SIZE(before_ht),
                                             *offset);
                if (skb_tailroom(skb) < noffset - *offset)
                        return -ENOBUFS;
                skb_put_data(skb, ie + *offset, noffset - *offset);
                *offset = noffset;
        }

        if (sband->ht_cap.ht_supported) {
                u8 *pos;

                if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
                        return -ENOBUFS;

                pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
                ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
                                          sband->ht_cap.cap);
        }

        /* insert custom IEs that go before VHT */
        if (ie && ie_len) {
                static const u8 before_vht[] = {
                        /*
                         * no need to list the ones split off already
                         * (or generated here)
                         */
                        WLAN_EID_BSS_COEX_2040,
                        WLAN_EID_EXT_CAPABILITY,
                        WLAN_EID_SSID_LIST,
                        WLAN_EID_CHANNEL_USAGE,
                        WLAN_EID_INTERWORKING,
                        WLAN_EID_MESH_ID,
                        /* 60 GHz (Multi-band, DMG, MMS) can't happen */
                };
                noffset = ieee80211_ie_split(ie, ie_len,
                                             before_vht, ARRAY_SIZE(before_vht),
                                             *offset);
                if (skb_tailroom(skb) < noffset - *offset)
                        return -ENOBUFS;
                skb_put_data(skb, ie + *offset, noffset - *offset);
                *offset = noffset;
        }

        /* Check if any channel in this sband supports at least 80 MHz */
        for (i = 0; i < sband->n_channels; i++) {
                if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
                                                IEEE80211_CHAN_NO_80MHZ))
                        continue;

                have_80mhz = true;
                break;
        }

        if (sband->vht_cap.vht_supported && have_80mhz) {
                u8 *pos;

                if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
                        return -ENOBUFS;

                pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
                ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
                                           sband->vht_cap.cap);
        }

        /* insert custom IEs that go before HE */
        if (ie && ie_len) {
                static const u8 before_he[] = {
                        /*
                         * no need to list the ones split off before VHT
                         * or generated here
                         */
                        WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
                        WLAN_EID_AP_CSN,
                        /* TODO: add 11ah/11aj/11ak elements */
                };
                noffset = ieee80211_ie_split(ie, ie_len,
                                             before_he, ARRAY_SIZE(before_he),
                                             *offset);
                if (skb_tailroom(skb) < noffset - *offset)
                        return -ENOBUFS;
                skb_put_data(skb, ie + *offset, noffset - *offset);
                *offset = noffset;
        }

        if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
                                         IEEE80211_CHAN_NO_HE)) {
                err = ieee80211_put_he_cap(skb, sdata, sband, NULL);
                if (err)
                        return err;
        }

        if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
                                         IEEE80211_CHAN_NO_HE |
                                         IEEE80211_CHAN_NO_EHT)) {
                err = ieee80211_put_eht_cap(skb, sdata, sband, NULL);
                if (err)
                        return err;
        }

        err = ieee80211_put_he_6ghz_cap(skb, sdata, IEEE80211_SMPS_OFF);
        if (err)
                return err;

        if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
                                         IEEE80211_CHAN_NO_UHR)) {
                err = ieee80211_put_uhr_cap(skb, sdata, sband);
                if (err)
                        return err;
        }

        /*
         * If adding more here, adjust code in main.c
         * that calculates local->scan_ies_len.
         */

        return 0;
}

static int ieee80211_put_preq_ies(struct sk_buff *skb,
                                  struct ieee80211_sub_if_data *sdata,
                                  struct ieee80211_scan_ies *ie_desc,
                                  const u8 *ie, size_t ie_len,
                                  u8 bands_used, u32 *rate_masks,
                                  struct cfg80211_chan_def *chandef,
                                  u32 flags)
{
        size_t custom_ie_offset = 0;
        int i, err;

        memset(ie_desc, 0, sizeof(*ie_desc));

        for (i = 0; i < NUM_NL80211_BANDS; i++) {
                if (bands_used & BIT(i)) {
                        ie_desc->ies[i] = skb_tail_pointer(skb);
                        err = ieee80211_put_preq_ies_band(skb, sdata,
                                                          ie, ie_len,
                                                          &custom_ie_offset,
                                                          i, rate_masks[i],
                                                          chandef, flags);
                        if (err)
                                return err;
                        ie_desc->len[i] = skb_tail_pointer(skb) -
                                          ie_desc->ies[i];
                }
        }

        /* add any remaining custom IEs */
        if (ie && ie_len) {
                if (WARN_ONCE(skb_tailroom(skb) < ie_len - custom_ie_offset,
                              "not enough space for preq custom IEs\n"))
                        return -ENOBUFS;
                ie_desc->common_ies = skb_tail_pointer(skb);
                skb_put_data(skb, ie + custom_ie_offset,
                             ie_len - custom_ie_offset);
                ie_desc->common_ie_len = skb_tail_pointer(skb) -
                                         ie_desc->common_ies;
        }

        return 0;
};

int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
                             size_t buffer_len,
                             struct ieee80211_scan_ies *ie_desc,
                             const u8 *ie, size_t ie_len,
                             u8 bands_used, u32 *rate_masks,
                             struct cfg80211_chan_def *chandef,
                             u32 flags)
{
        struct sk_buff *skb = alloc_skb(buffer_len, GFP_KERNEL);
        uintptr_t offs;
        int ret, i;
        u8 *start;

        if (!skb)
                return -ENOMEM;

        start = skb_tail_pointer(skb);
        memset(start, 0, skb_tailroom(skb));
        ret = ieee80211_put_preq_ies(skb, sdata, ie_desc, ie, ie_len,
                                     bands_used, rate_masks, chandef,
                                     flags);
        if (ret < 0) {
                goto out;
        }

        if (skb->len > buffer_len) {
                ret = -ENOBUFS;
                goto out;
        }

        memcpy(buffer, start, skb->len);

        /* adjust ie_desc for copy */
        for (i = 0; i < NUM_NL80211_BANDS; i++) {
                offs = ie_desc->ies[i] - start;
                ie_desc->ies[i] = buffer + offs;
        }
        offs = ie_desc->common_ies - start;
        ie_desc->common_ies = buffer + offs;

        ret = skb->len;
out:
        consume_skb(skb);
        return ret;
}

struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
                                          const u8 *src, const u8 *dst,
                                          u32 ratemask,
                                          struct ieee80211_channel *chan,
                                          const u8 *ssid, size_t ssid_len,
                                          const u8 *ie, size_t ie_len,
                                          u32 flags)
{
        struct ieee80211_local *local = sdata->local;
        struct cfg80211_chan_def chandef;
        struct sk_buff *skb;
        struct ieee80211_mgmt *mgmt;
        u32 rate_masks[NUM_NL80211_BANDS] = {};
        struct ieee80211_scan_ies dummy_ie_desc;

        /*
         * Do not send DS Channel parameter for directed probe requests
         * in order to maximize the chance that we get a response.  Some
         * badly-behaved APs don't respond when this parameter is included.
         */
        chandef.width = sdata->vif.bss_conf.chanreq.oper.width;
        if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
                chandef.chan = NULL;
        else
                chandef.chan = chan;

        skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
                                     local->scan_ies_len + ie_len);
        if (!skb)
                return NULL;

        rate_masks[chan->band] = ratemask;
        ieee80211_put_preq_ies(skb, sdata, &dummy_ie_desc,
                               ie, ie_len, BIT(chan->band),
                               rate_masks, &chandef, flags);

        if (dst) {
                mgmt = (struct ieee80211_mgmt *) skb->data;
                memcpy(mgmt->da, dst, ETH_ALEN);
                memcpy(mgmt->bssid, dst, ETH_ALEN);
        }

        IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;

        return skb;
}

u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
                            struct ieee802_11_elems *elems,
                            enum nl80211_band band, u32 *basic_rates)
{
        struct ieee80211_supported_band *sband;
        size_t num_rates;
        u32 supp_rates;
        int i, j;

        sband = sdata->local->hw.wiphy->bands[band];
        if (WARN_ON(!sband))
                return 1;

        num_rates = sband->n_bitrates;
        supp_rates = 0;
        for (i = 0; i < elems->supp_rates_len +
                     elems->ext_supp_rates_len; i++) {
                u8 rate = 0;
                int own_rate;
                bool is_basic;
                if (i < elems->supp_rates_len)
                        rate = elems->supp_rates[i];
                else if (elems->ext_supp_rates)
                        rate = elems->ext_supp_rates
                                [i - elems->supp_rates_len];
                own_rate = 5 * (rate & 0x7f);
                is_basic = !!(rate & 0x80);

                if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
                        continue;

                for (j = 0; j < num_rates; j++) {
                        int brate = sband->bitrates[j].bitrate;

                        if (brate == own_rate) {
                                supp_rates |= BIT(j);
                                if (basic_rates && is_basic)
                                        *basic_rates |= BIT(j);
                        }
                }
        }
        return supp_rates;
}

void ieee80211_stop_device(struct ieee80211_local *local, bool suspend)
{
        local_bh_disable();
        ieee80211_handle_queued_frames(local);
        local_bh_enable();

        ieee80211_led_radio(local, false);
        ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);

        wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);

        flush_workqueue(local->workqueue);
        wiphy_work_flush(local->hw.wiphy, NULL);
        drv_stop(local, suspend);
}

static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
                                           bool aborted)
{
        /* It's possible that we don't handle the scan completion in
         * time during suspend, so if it's still marked as completed
         * here, queue the work and flush it to clean things up.
         * Instead of calling the worker function directly here, we
         * really queue it to avoid potential races with other flows
         * scheduling the same work.
         */
        if (test_bit(SCAN_COMPLETED, &local->scanning)) {
                /* If coming from reconfiguration failure, abort the scan so
                 * we don't attempt to continue a partial HW scan - which is
                 * possible otherwise if (e.g.) the 2.4 GHz portion was the
                 * completed scan, and a 5 GHz portion is still pending.
                 */
                if (aborted)
                        set_bit(SCAN_ABORTED, &local->scanning);
                wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0);
                wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
        }
}

static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
{
        struct ieee80211_sub_if_data *sdata;
        struct ieee80211_chanctx *ctx;

        lockdep_assert_wiphy(local->hw.wiphy);

        /*
         * We get here if during resume the device can't be restarted properly.
         * We might also get here if this happens during HW reset, which is a
         * slightly different situation and we need to drop all connections in
         * the latter case.
         *
         * Ask cfg80211 to turn off all interfaces, this will result in more
         * warnings but at least we'll then get into a clean stopped state.
         */

        local->resuming = false;
        local->suspended = false;
        local->in_reconfig = false;
        local->reconfig_failure = true;

        ieee80211_flush_completed_scan(local, true);

        /* scheduled scan clearly can't be running any more, but tell
         * cfg80211 and clear local state
         */
        ieee80211_sched_scan_end(local);

        list_for_each_entry(sdata, &local->interfaces, list)
                sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;

        /* Mark channel contexts as not being in the driver any more to avoid
         * removing them from the driver during the shutdown process...
         */
        list_for_each_entry(ctx, &local->chanctx_list, list)
                ctx->driver_present = false;
}

static void ieee80211_assign_chanctx(struct ieee80211_local *local,
                                     struct ieee80211_sub_if_data *sdata,
                                     struct ieee80211_link_data *link)
{
        struct ieee80211_chanctx_conf *conf;
        struct ieee80211_chanctx *ctx;

        lockdep_assert_wiphy(local->hw.wiphy);

        conf = rcu_dereference_protected(link->conf->chanctx_conf,
                                         lockdep_is_held(&local->hw.wiphy->mtx));
        if (conf) {
                ctx = container_of(conf, struct ieee80211_chanctx, conf);
                drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
        }
}

static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
{
        struct ieee80211_local *local = sdata->local;
        struct sta_info *sta;

        lockdep_assert_wiphy(local->hw.wiphy);

        /* add STAs back */
        list_for_each_entry(sta, &local->sta_list, list) {
                enum ieee80211_sta_state state;

                if (!sta->uploaded || sta->sdata != sdata)
                        continue;

                for (state = IEEE80211_STA_NOTEXIST;
                     state < sta->sta_state; state++)
                        WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
                                              state + 1));
        }
}

static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
{
        struct cfg80211_nan_func *func, **funcs;
        int res, id, i = 0;

        res = drv_start_nan(sdata->local, sdata,
                            &sdata->u.nan.conf);
        if (WARN_ON(res))
                return res;

        funcs = kzalloc_objs(*funcs, sdata->local->hw.max_nan_de_entries + 1);
        if (!funcs)
                return -ENOMEM;

        /* Add all the functions:
         * This is a little bit ugly. We need to call a potentially sleeping
         * callback for each NAN function, so we can't hold the spinlock.
         */
        spin_lock_bh(&sdata->u.nan.func_lock);

        idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
                funcs[i++] = func;

        spin_unlock_bh(&sdata->u.nan.func_lock);

        for (i = 0; funcs[i]; i++) {
                res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
                if (WARN_ON(res))
                        ieee80211_nan_func_terminated(&sdata->vif,
                                                      funcs[i]->instance_id,
                                                      NL80211_NAN_FUNC_TERM_REASON_ERROR,
                                                      GFP_KERNEL);
        }

        kfree(funcs);

        return 0;
}

static void ieee80211_reconfig_ap_links(struct ieee80211_local *local,
                                        struct ieee80211_sub_if_data *sdata,
                                        u64 changed)
{
        int link_id;

        for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
                struct ieee80211_link_data *link;

                if (!(sdata->vif.active_links & BIT(link_id)))
                        continue;

                link = sdata_dereference(sdata->link[link_id], sdata);
                if (!link)
                        continue;

                if (rcu_access_pointer(link->u.ap.beacon))
                        drv_start_ap(local, sdata, link->conf);

                if (!link->conf->enable_beacon)
                        continue;

                changed |= BSS_CHANGED_BEACON |
                           BSS_CHANGED_BEACON_ENABLED;

                ieee80211_link_info_change_notify(sdata, link, changed);
        }
}

int ieee80211_reconfig(struct ieee80211_local *local)
{
        struct ieee80211_hw *hw = &local->hw;
        struct ieee80211_sub_if_data *sdata;
        struct ieee80211_chanctx *ctx;
        struct sta_info *sta;
        int res, i;
        bool reconfig_due_to_wowlan = false;
        struct ieee80211_sub_if_data *sched_scan_sdata;
        struct cfg80211_sched_scan_request *sched_scan_req;
        bool sched_scan_stopped = false;
        bool suspended = local->suspended;
        bool in_reconfig = false;

        lockdep_assert_wiphy(local->hw.wiphy);

        /* nothing to do if HW shouldn't run */
        if (!local->open_count)
                goto wake_up;

#ifdef CONFIG_PM
        if (suspended)
                local->resuming = true;

        if (local->wowlan) {
                /*
                 * In the wowlan case, both mac80211 and the device
                 * are functional when the resume op is called, so
                 * clear local->suspended so the device could operate
                 * normally (e.g. pass rx frames).
                 */
                local->suspended = false;
                res = drv_resume(local);
                local->wowlan = false;
                if (res < 0) {
                        local->resuming = false;
                        return res;
                }
                if (res == 0)
                        goto wake_up;
                WARN_ON(res > 1);
                /*
                 * res is 1, which means the driver requested
                 * to go through a regular reset on wakeup.
                 * restore local->suspended in this case.
                 */
                reconfig_due_to_wowlan = true;
                local->suspended = true;
        }
#endif

        /*
         * In case of hw_restart during suspend (without wowlan),
         * cancel restart work, as we are reconfiguring the device
         * anyway.
         * Note that restart_work is scheduled on a frozen workqueue,
         * so we can't deadlock in this case.
         */
        if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
                cancel_work_sync(&local->restart_work);

        local->started = false;

        /*
         * Upon resume hardware can sometimes be goofy due to
         * various platform / driver / bus issues, so restarting
         * the device may at times not work immediately. Propagate
         * the error.
         */
        res = drv_start(local);
        if (res) {
                if (suspended)
                        WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
                else
                        WARN(1, "Hardware became unavailable during restart.\n");
                ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
                                                IEEE80211_QUEUE_STOP_REASON_SUSPEND,
                                                false);
                ieee80211_handle_reconfig_failure(local);
                return res;
        }

        /* setup fragmentation threshold */
        drv_set_frag_threshold(local, -1, hw->wiphy->frag_threshold);

        /* setup RTS threshold */
        if (hw->wiphy->n_radio > 0) {
                for (i = 0; i < hw->wiphy->n_radio; i++) {
                        u32 rts_threshold =
                                hw->wiphy->radio_cfg[i].rts_threshold;

                        drv_set_rts_threshold(local, i, rts_threshold);
                }
        } else {
                drv_set_rts_threshold(local, -1, hw->wiphy->rts_threshold);
        }

        /* reset coverage class */
        drv_set_coverage_class(local, -1, hw->wiphy->coverage_class);

        ieee80211_led_radio(local, true);
        ieee80211_mod_tpt_led_trig(local,
                                   IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);

        /* add interfaces */
        sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
        if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
                /* in HW restart it exists already */
                WARN_ON(local->resuming);
                res = drv_add_interface(local, sdata);
                if (WARN_ON(res)) {
                        RCU_INIT_POINTER(local->monitor_sdata, NULL);
                        synchronize_net();
                        kfree(sdata);
                }
        }

        list_for_each_entry(sdata, &local->interfaces, list) {
                if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
                    !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
                        continue;
                if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
                    ieee80211_sdata_running(sdata)) {
                        res = drv_add_interface(local, sdata);
                        if (WARN_ON(res))
                                break;
                }
        }

        /* If adding any of the interfaces failed above, roll back and
         * report failure.
         */
        if (res) {
                list_for_each_entry_continue_reverse(sdata, &local->interfaces,
                                                     list) {
                        if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
                            !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
                                continue;
                        if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
                            ieee80211_sdata_running(sdata))
                                drv_remove_interface(local, sdata);
                }
                ieee80211_handle_reconfig_failure(local);
                return res;
        }

        /* add channel contexts */
        list_for_each_entry(ctx, &local->chanctx_list, list)
                if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
                        WARN_ON(drv_add_chanctx(local, ctx));

        sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
        if (sdata && ieee80211_sdata_running(sdata))
                ieee80211_assign_chanctx(local, sdata, &sdata->deflink);

        /* reconfigure hardware */
        ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_LISTEN_INTERVAL |
                                       IEEE80211_CONF_CHANGE_MONITOR |
                                       IEEE80211_CONF_CHANGE_PS |
                                       IEEE80211_CONF_CHANGE_RETRY_LIMITS |
                                       IEEE80211_CONF_CHANGE_IDLE);

        ieee80211_configure_filter(local);

        /* Finally also reconfigure all the BSS information */
        list_for_each_entry(sdata, &local->interfaces, list) {
                /* common change flags for all interface types - link only */
                u64 changed = BSS_CHANGED_ERP_CTS_PROT |
                              BSS_CHANGED_ERP_PREAMBLE |
                              BSS_CHANGED_ERP_SLOT |
                              BSS_CHANGED_HT |
                              BSS_CHANGED_BASIC_RATES |
                              BSS_CHANGED_BEACON_INT |
                              BSS_CHANGED_BSSID |
                              BSS_CHANGED_CQM |
                              BSS_CHANGED_QOS |
                              BSS_CHANGED_TXPOWER |
                              BSS_CHANGED_MCAST_RATE;
                struct ieee80211_link_data *link = NULL;
                unsigned int link_id;
                u32 active_links = 0;

                if (!ieee80211_sdata_running(sdata))
                        continue;

                if (ieee80211_vif_is_mld(&sdata->vif)) {
                        struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS] = {
                                [0] = &sdata->vif.bss_conf,
                        };

                        if (sdata->vif.type == NL80211_IFTYPE_STATION) {
                                /* start with a single active link */
                                active_links = sdata->vif.active_links;
                                link_id = ffs(active_links) - 1;
                                sdata->vif.active_links = BIT(link_id);
                        }

                        drv_change_vif_links(local, sdata, 0,
                                             sdata->vif.active_links,
                                             old);
                }

                sdata->restart_active_links = active_links;

                for (link_id = 0;
                     link_id < ARRAY_SIZE(sdata->vif.link_conf);
                     link_id++) {
                        if (!ieee80211_vif_link_active(&sdata->vif, link_id))
                                continue;

                        link = sdata_dereference(sdata->link[link_id], sdata);
                        if (!link)
                                continue;

                        ieee80211_assign_chanctx(local, sdata, link);
                }

                switch (sdata->vif.type) {
                case NL80211_IFTYPE_AP_VLAN:
                case NL80211_IFTYPE_MONITOR:
                        break;
                case NL80211_IFTYPE_ADHOC:
                        if (sdata->vif.cfg.ibss_joined)
                                WARN_ON(drv_join_ibss(local, sdata));
                        fallthrough;
                default:
                        ieee80211_reconfig_stations(sdata);
                        fallthrough;
                case NL80211_IFTYPE_AP: /* AP stations are handled later */
                        for (i = 0; i < IEEE80211_NUM_ACS; i++)
                                drv_conf_tx(local, &sdata->deflink, i,
                                            &sdata->deflink.tx_conf[i]);
                        break;
                }

                if (sdata->vif.bss_conf.mu_mimo_owner)
                        changed |= BSS_CHANGED_MU_GROUPS;

                if (!ieee80211_vif_is_mld(&sdata->vif))
                        changed |= BSS_CHANGED_IDLE;

                switch (sdata->vif.type) {
                case NL80211_IFTYPE_STATION:
                        if (!ieee80211_vif_is_mld(&sdata->vif)) {
                                changed |= BSS_CHANGED_ASSOC |
                                           BSS_CHANGED_ARP_FILTER |
                                           BSS_CHANGED_PS;

                                /* Re-send beacon info report to the driver */
                                if (sdata->deflink.u.mgd.have_beacon)
                                        changed |= BSS_CHANGED_BEACON_INFO;

                                if (sdata->vif.bss_conf.max_idle_period ||
                                    sdata->vif.bss_conf.protected_keep_alive)
                                        changed |= BSS_CHANGED_KEEP_ALIVE;

                                ieee80211_bss_info_change_notify(sdata,
                                                                 changed);
                        } else if (!WARN_ON(!link)) {
                                ieee80211_link_info_change_notify(sdata, link,
                                                                  changed);
                                changed = BSS_CHANGED_ASSOC |
                                          BSS_CHANGED_IDLE |
                                          BSS_CHANGED_PS |
                                          BSS_CHANGED_ARP_FILTER;
                                ieee80211_vif_cfg_change_notify(sdata, changed);
                        }
                        break;
                case NL80211_IFTYPE_OCB:
                        changed |= BSS_CHANGED_OCB;
                        ieee80211_bss_info_change_notify(sdata, changed);
                        break;
                case NL80211_IFTYPE_ADHOC:
                        changed |= BSS_CHANGED_IBSS;
                        fallthrough;
                case NL80211_IFTYPE_AP:
                        changed |= BSS_CHANGED_P2P_PS;

                        if (ieee80211_vif_is_mld(&sdata->vif))
                                ieee80211_vif_cfg_change_notify(sdata,
                                                                BSS_CHANGED_SSID);
                        else
                                changed |= BSS_CHANGED_SSID;

                        if (sdata->vif.bss_conf.ftm_responder == 1 &&
                            wiphy_ext_feature_isset(sdata->local->hw.wiphy,
                                        NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
                                changed |= BSS_CHANGED_FTM_RESPONDER;

                        if (sdata->vif.type == NL80211_IFTYPE_AP) {
                                changed |= BSS_CHANGED_AP_PROBE_RESP;

                                if (ieee80211_vif_is_mld(&sdata->vif)) {
                                        ieee80211_reconfig_ap_links(local,
                                                                    sdata,
                                                                    changed);
                                        break;
                                }

                                if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
                                        drv_start_ap(local, sdata,
                                                     sdata->deflink.conf);
                        }
                        fallthrough;
                case NL80211_IFTYPE_MESH_POINT:
                        if (sdata->vif.bss_conf.enable_beacon) {
                                changed |= BSS_CHANGED_BEACON |
                                           BSS_CHANGED_BEACON_ENABLED;
                                ieee80211_bss_info_change_notify(sdata, changed);
                        }
                        break;
                case NL80211_IFTYPE_NAN:
                        res = ieee80211_reconfig_nan(sdata);
                        if (res < 0) {
                                ieee80211_handle_reconfig_failure(local);
                                return res;
                        }
                        break;
                case NL80211_IFTYPE_AP_VLAN:
                case NL80211_IFTYPE_MONITOR:
                case NL80211_IFTYPE_P2P_DEVICE:
                        /* nothing to do */
                        break;
                case NL80211_IFTYPE_UNSPECIFIED:
                case NUM_NL80211_IFTYPES:
                case NL80211_IFTYPE_P2P_CLIENT:
                case NL80211_IFTYPE_P2P_GO:
                case NL80211_IFTYPE_WDS:
                        WARN_ON(1);
                        break;
                }
        }

        ieee80211_recalc_ps(local);

        /*
         * The sta might be in psm against the ap (e.g. because
         * this was the state before a hw restart), so we
         * explicitly send a null packet in order to make sure
         * it'll sync against the ap (and get out of psm).
         */
        if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
                list_for_each_entry(sdata, &local->interfaces, list) {
                        if (sdata->vif.type != NL80211_IFTYPE_STATION)
                                continue;
                        if (!sdata->u.mgd.associated)
                                continue;

                        ieee80211_send_nullfunc(local, sdata, false);
                }
        }

        /* APs are now beaconing, add back stations */
        list_for_each_entry(sdata, &local->interfaces, list) {
                if (!ieee80211_sdata_running(sdata))
                        continue;

                switch (sdata->vif.type) {
                case NL80211_IFTYPE_AP_VLAN:
                case NL80211_IFTYPE_AP:
                        ieee80211_reconfig_stations(sdata);
                        break;
                default:
                        break;
                }
        }

        /* add back keys */
        list_for_each_entry(sdata, &local->interfaces, list)
                ieee80211_reenable_keys(sdata);

        /* re-enable multi-link for client interfaces */
        list_for_each_entry(sdata, &local->interfaces, list) {
                if (sdata->restart_active_links)
                        ieee80211_set_active_links(&sdata->vif,
                                                   sdata->restart_active_links);
                /*
                 * If a link switch was scheduled before the restart, and ran
                 * before reconfig, it will do nothing, so re-schedule.
                 */
                if (sdata->desired_active_links)
                        wiphy_work_queue(sdata->local->hw.wiphy,
                                         &sdata->activate_links_work);
        }

        /* Reconfigure sched scan if it was interrupted by FW restart */
        sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
                                                lockdep_is_held(&local->hw.wiphy->mtx));
        sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
                                                lockdep_is_held(&local->hw.wiphy->mtx));
        if (sched_scan_sdata && sched_scan_req)
                /*
                 * Sched scan stopped, but we don't want to report it. Instead,
                 * we're trying to reschedule. However, if more than one scan
                 * plan was set, we cannot reschedule since we don't know which
                 * scan plan was currently running (and some scan plans may have
                 * already finished).
                 */
                if (sched_scan_req->n_scan_plans > 1 ||
                    __ieee80211_request_sched_scan_start(sched_scan_sdata,
                                                         sched_scan_req)) {
                        RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
                        RCU_INIT_POINTER(local->sched_scan_req, NULL);
                        sched_scan_stopped = true;
                }

        if (sched_scan_stopped)
                cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);

 wake_up:
        /*
         * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
         * sessions can be established after a resume.
         *
         * Also tear down aggregation sessions since reconfiguring
         * them in a hardware restart scenario is not easily done
         * right now, and the hardware will have lost information
         * about the sessions, but we and the AP still think they
         * are active. This is really a workaround though.
         */
        if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
                list_for_each_entry(sta, &local->sta_list, list) {
                        if (!local->resuming)
                                ieee80211_sta_tear_down_BA_sessions(
                                                sta, AGG_STOP_LOCAL_REQUEST);
                        clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
                }
        }

        /*
         * If this is for hw restart things are still running.
         * We may want to change that later, however.
         */
        if (local->open_count && (!suspended || reconfig_due_to_wowlan))
                drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);

        if (local->in_reconfig) {
                in_reconfig = local->in_reconfig;
                local->in_reconfig = false;
                barrier();

                ieee80211_reconfig_roc(local);

                /* Requeue all works */
                list_for_each_entry(sdata, &local->interfaces, list) {
                        if (ieee80211_sdata_running(sdata))
                                wiphy_work_queue(local->hw.wiphy, &sdata->work);
                }
        }

        ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
                                        IEEE80211_QUEUE_STOP_REASON_SUSPEND,
                                        false);

        if (in_reconfig) {
                list_for_each_entry(sdata, &local->interfaces, list) {
                        if (!ieee80211_sdata_running(sdata))
                                continue;
                        if (sdata->vif.type == NL80211_IFTYPE_STATION)
                                ieee80211_sta_restart(sdata);
                }
        }

        /* Passing NULL means an interface is picked for configuration */
        if (local->virt_monitors > 0 &&
            local->virt_monitors == local->open_count)
                ieee80211_add_virtual_monitor(local, NULL);

        if (!suspended)
                return 0;

#ifdef CONFIG_PM
        /* first set suspended false, then resuming */
        local->suspended = false;
        mb();
        local->resuming = false;

        ieee80211_flush_completed_scan(local, false);

        if (local->open_count && !reconfig_due_to_wowlan)
                drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);

        list_for_each_entry(sdata, &local->interfaces, list) {
                if (!ieee80211_sdata_running(sdata))
                        continue;
                if (sdata->vif.type == NL80211_IFTYPE_STATION)
                        ieee80211_sta_restart(sdata);
        }

        mod_timer(&local->sta_cleanup, jiffies + 1);
#else
        WARN_ON(1);
#endif

        return 0;
}

static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
{
        struct ieee80211_sub_if_data *sdata;
        struct ieee80211_local *local;
        struct ieee80211_key *key;

        if (WARN_ON(!vif))
                return;

        sdata = vif_to_sdata(vif);
        local = sdata->local;

        lockdep_assert_wiphy(local->hw.wiphy);

        if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
                    !local->resuming))
                return;

        if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
                    !local->in_reconfig))
                return;

        if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
                return;

        sdata->flags |= flag;

        list_for_each_entry(key, &sdata->key_list, list)
                key->flags |= KEY_FLAG_TAINTED;
}

void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
{
        ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
}
EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);

void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
{
        ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
}
EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);

void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
                           struct ieee80211_link_data *link)
{
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_chanctx_conf *chanctx_conf;
        struct ieee80211_chanctx *chanctx;

        lockdep_assert_wiphy(local->hw.wiphy);

        chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
                                                 lockdep_is_held(&local->hw.wiphy->mtx));

        /*
         * This function can be called from a work, thus it may be possible
         * that the chanctx_conf is removed (due to a disconnection, for
         * example).
         * So nothing should be done in such case.
         */
        if (!chanctx_conf)
                return;

        chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
        ieee80211_recalc_smps_chanctx(local, chanctx);
}

void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
                                  int link_id)
{
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_chanctx_conf *chanctx_conf;
        struct ieee80211_chanctx *chanctx;
        int i;

        lockdep_assert_wiphy(local->hw.wiphy);

        for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
                struct ieee80211_bss_conf *bss_conf;

                if (link_id >= 0 && link_id != i)
                        continue;

                rcu_read_lock();
                bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
                if (!bss_conf) {
                        rcu_read_unlock();
                        continue;
                }

                chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
                                                         lockdep_is_held(&local->hw.wiphy->mtx));
                /*
                 * Since we hold the wiphy mutex (checked above)
                 * we can take the chanctx_conf pointer out of the
                 * RCU critical section, it cannot go away without
                 * the mutex. Just the way we reached it could - in
                 * theory - go away, but we don't really care and
                 * it really shouldn't happen anyway.
                 */
                rcu_read_unlock();

                if (!chanctx_conf)
                        return;

                chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
                                       conf);
                ieee80211_recalc_chanctx_min_def(local, chanctx);
        }
}

size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
{
        size_t pos = offset;

        while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
                pos += 2 + ies[pos + 1];

        return pos;
}

u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
                              u16 cap)
{
        __le16 tmp;

        *pos++ = WLAN_EID_HT_CAPABILITY;
        *pos++ = sizeof(struct ieee80211_ht_cap);
        memset(pos, 0, sizeof(struct ieee80211_ht_cap));

        /* capability flags */
        tmp = cpu_to_le16(cap);
        memcpy(pos, &tmp, sizeof(u16));
        pos += sizeof(u16);

        /* AMPDU parameters */
        *pos++ = ht_cap->ampdu_factor |
                 (ht_cap->ampdu_density <<
                        IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);

        /* MCS set */
        memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
        pos += sizeof(ht_cap->mcs);

        /* extended capabilities */
        pos += sizeof(__le16);

        /* BF capabilities */
        pos += sizeof(__le32);

        /* antenna selection */
        pos += sizeof(u8);

        return pos;
}

u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
                               u32 cap)
{
        __le32 tmp;

        *pos++ = WLAN_EID_VHT_CAPABILITY;
        *pos++ = sizeof(struct ieee80211_vht_cap);
        memset(pos, 0, sizeof(struct ieee80211_vht_cap));

        /* capability flags */
        tmp = cpu_to_le32(cap);
        memcpy(pos, &tmp, sizeof(u32));
        pos += sizeof(u32);

        /* VHT MCS set */
        memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
        pos += sizeof(vht_cap->vht_mcs);

        return pos;
}

/* this may return more than ieee80211_put_he_6ghz_cap() will need */
u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata)
{
        const struct ieee80211_sta_he_cap *he_cap;
        struct ieee80211_supported_band *sband;
        u8 n;

        sband = ieee80211_get_sband(sdata);
        if (!sband)
                return 0;

        he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
        if (!he_cap)
                return 0;

        n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
        return 2 + 1 +
               sizeof(he_cap->he_cap_elem) + n +
               ieee80211_he_ppe_size(he_cap->ppe_thres[0],
                                     he_cap->he_cap_elem.phy_cap_info);
}

static void
ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings *conn,
                              const struct ieee80211_sta_he_cap *he_cap,
                              struct ieee80211_he_cap_elem *elem)
{
        u8 ru_limit, max_ru;

        *elem = he_cap->he_cap_elem;

        switch (conn->bw_limit) {
        case IEEE80211_CONN_BW_LIMIT_20:
                ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_242;
                break;
        case IEEE80211_CONN_BW_LIMIT_40:
                ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_484;
                break;
        case IEEE80211_CONN_BW_LIMIT_80:
                ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_996;
                break;
        default:
                ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_2x996;
                break;
        }

        max_ru = elem->phy_cap_info[8] & IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
        max_ru = min(max_ru, ru_limit);
        elem->phy_cap_info[8] &= ~IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
        elem->phy_cap_info[8] |= max_ru;

        if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) {
                elem->phy_cap_info[0] &=
                        ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
                          IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
                elem->phy_cap_info[9] &=
                        ~IEEE80211_HE_PHY_CAP9_LONGER_THAN_16_SIGB_OFDM_SYM;
        }

        if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
                elem->phy_cap_info[0] &=
                        ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
                          IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G);
                elem->phy_cap_info[5] &=
                        ~IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK;
                elem->phy_cap_info[7] &=
                        ~(IEEE80211_HE_PHY_CAP7_STBC_TX_ABOVE_80MHZ |
                          IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ);
        }
}

int ieee80211_put_he_cap(struct sk_buff *skb,
                         struct ieee80211_sub_if_data *sdata,
                         const struct ieee80211_supported_band *sband,
                         const struct ieee80211_conn_settings *conn)
{
        const struct ieee80211_sta_he_cap *he_cap;
        struct ieee80211_he_cap_elem elem;
        u8 *len;
        u8 n;
        u8 ie_len;

        if (!conn)
                conn = &ieee80211_conn_settings_unlimited;

        he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
        if (!he_cap)
                return 0;

        /* modify on stack first to calculate 'n' and 'ie_len' correctly */
        ieee80211_get_adjusted_he_cap(conn, he_cap, &elem);

        n = ieee80211_he_mcs_nss_size(&elem);
        ie_len = 2 + 1 +
                 sizeof(he_cap->he_cap_elem) + n +
                 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
                                       he_cap->he_cap_elem.phy_cap_info);

        if (skb_tailroom(skb) < ie_len)
                return -ENOBUFS;

        skb_put_u8(skb, WLAN_EID_EXTENSION);
        len = skb_put(skb, 1); /* We'll set the size later below */
        skb_put_u8(skb, WLAN_EID_EXT_HE_CAPABILITY);

        /* Fixed data */
        skb_put_data(skb, &elem, sizeof(elem));

        skb_put_data(skb, &he_cap->he_mcs_nss_supp, n);

        /* Check if PPE Threshold should be present */
        if ((he_cap->he_cap_elem.phy_cap_info[6] &
             IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
                goto end;

        /*
         * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
         * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
         */
        n = hweight8(he_cap->ppe_thres[0] &
                     IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
        n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
                   IEEE80211_PPE_THRES_NSS_POS));

        /*
         * Each pair is 6 bits, and we need to add the 7 "header" bits to the
         * total size.
         */
        n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
        n = DIV_ROUND_UP(n, 8);

        /* Copy PPE Thresholds */
        skb_put_data(skb, &he_cap->ppe_thres, n);

end:
        *len = skb_tail_pointer(skb) - len - 1;
        return 0;
}

int ieee80211_put_reg_conn(struct sk_buff *skb,
                           enum ieee80211_channel_flags flags)
{
        u8 reg_conn = IEEE80211_REG_CONN_LPI_VALID |
                      IEEE80211_REG_CONN_LPI_VALUE |
                      IEEE80211_REG_CONN_SP_VALID;

        if (!(flags & IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT))
                reg_conn |= IEEE80211_REG_CONN_SP_VALUE;

        skb_put_u8(skb, WLAN_EID_EXTENSION);
        skb_put_u8(skb, 1 + sizeof(reg_conn));
        skb_put_u8(skb, WLAN_EID_EXT_NON_AP_STA_REG_CON);
        skb_put_u8(skb, reg_conn);
        return 0;
}

int ieee80211_put_he_6ghz_cap(struct sk_buff *skb,
                              struct ieee80211_sub_if_data *sdata,
                              enum ieee80211_smps_mode smps_mode)
{
        struct ieee80211_supported_band *sband;
        const struct ieee80211_sband_iftype_data *iftd;
        enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
        __le16 cap;

        if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
                                          BIT(NL80211_BAND_6GHZ),
                                          IEEE80211_CHAN_NO_HE))
                return 0;

        sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];

        iftd = ieee80211_get_sband_iftype_data(sband, iftype);
        if (!iftd)
                return 0;

        /* Check for device HE 6 GHz capability before adding element */
        if (!iftd->he_6ghz_capa.capa)
                return 0;

        cap = iftd->he_6ghz_capa.capa;
        cap &= cpu_to_le16(~IEEE80211_HE_6GHZ_CAP_SM_PS);

        switch (smps_mode) {
        case IEEE80211_SMPS_AUTOMATIC:
        case IEEE80211_SMPS_NUM_MODES:
                WARN_ON(1);
                fallthrough;
        case IEEE80211_SMPS_OFF:
                cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
                break;
        case IEEE80211_SMPS_STATIC:
                cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
                break;
        case IEEE80211_SMPS_DYNAMIC:
                cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
                break;
        }

        if (skb_tailroom(skb) < 2 + 1 + sizeof(cap))
                return -ENOBUFS;

        skb_put_u8(skb, WLAN_EID_EXTENSION);
        skb_put_u8(skb, 1 + sizeof(cap));
        skb_put_u8(skb, WLAN_EID_EXT_HE_6GHZ_CAPA);
        skb_put_data(skb, &cap, sizeof(cap));
        return 0;
}

u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
                               const struct cfg80211_chan_def *chandef,
                               u16 prot_mode, bool rifs_mode)
{
        struct ieee80211_ht_operation *ht_oper;
        /* Build HT Information */
        *pos++ = WLAN_EID_HT_OPERATION;
        *pos++ = sizeof(struct ieee80211_ht_operation);
        ht_oper = (struct ieee80211_ht_operation *)pos;
        ht_oper->primary_chan = ieee80211_frequency_to_channel(
                                        chandef->chan->center_freq);
        switch (chandef->width) {
        case NL80211_CHAN_WIDTH_160:
        case NL80211_CHAN_WIDTH_80P80:
        case NL80211_CHAN_WIDTH_80:
        case NL80211_CHAN_WIDTH_40:
                if (chandef->center_freq1 > chandef->chan->center_freq)
                        ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
                else
                        ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
                break;
        case NL80211_CHAN_WIDTH_320:
                /* HT information element should not be included on 6GHz */
                WARN_ON(1);
                return pos;
        default:
                ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
                break;
        }
        if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
            chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
            chandef->width != NL80211_CHAN_WIDTH_20)
                ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;

        if (rifs_mode)
                ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;

        ht_oper->operation_mode = cpu_to_le16(prot_mode);
        ht_oper->stbc_param = 0x0000;

        /* It seems that Basic MCS set and Supported MCS set
           are identical for the first 10 bytes */
        memset(&ht_oper->basic_set, 0, 16);
        memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);

        return pos + sizeof(struct ieee80211_ht_operation);
}

void ieee80211_ie_build_wide_bw_cs(u8 *pos,
                                   const struct cfg80211_chan_def *chandef)
{
        *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
        *pos++ = 3;                                     /* IE length */
        /* New channel width */
        switch (chandef->width) {
        case NL80211_CHAN_WIDTH_80:
                *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
                break;
        case NL80211_CHAN_WIDTH_160:
                *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
                break;
        case NL80211_CHAN_WIDTH_80P80:
                *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
                break;
        case NL80211_CHAN_WIDTH_320:
                /* The behavior is not defined for 320 MHz channels */
                WARN_ON(1);
                fallthrough;
        default:
                *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
        }

        /* new center frequency segment 0 */
        *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
        /* new center frequency segment 1 */
        if (chandef->center_freq2)
                *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
        else
                *pos++ = 0;
}

u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
                                const struct cfg80211_chan_def *chandef)
{
        struct ieee80211_vht_operation *vht_oper;

        *pos++ = WLAN_EID_VHT_OPERATION;
        *pos++ = sizeof(struct ieee80211_vht_operation);
        vht_oper = (struct ieee80211_vht_operation *)pos;
        vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
                                                        chandef->center_freq1);
        if (chandef->center_freq2)
                vht_oper->center_freq_seg1_idx =
                        ieee80211_frequency_to_channel(chandef->center_freq2);
        else
                vht_oper->center_freq_seg1_idx = 0x00;

        switch (chandef->width) {
        case NL80211_CHAN_WIDTH_160:
                /*
                 * Convert 160 MHz channel width to new style as interop
                 * workaround.
                 */
                vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
                vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
                if (chandef->chan->center_freq < chandef->center_freq1)
                        vht_oper->center_freq_seg0_idx -= 8;
                else
                        vht_oper->center_freq_seg0_idx += 8;
                break;
        case NL80211_CHAN_WIDTH_80P80:
                /*
                 * Convert 80+80 MHz channel width to new style as interop
                 * workaround.
                 */
                vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
                break;
        case NL80211_CHAN_WIDTH_80:
                vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
                break;
        case NL80211_CHAN_WIDTH_320:
                /* VHT information element should not be included on 6GHz */
                WARN_ON(1);
                return pos;
        default:
                vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
                break;
        }

        /* don't require special VHT peer rates */
        vht_oper->basic_mcs_set = cpu_to_le16(0xffff);

        return pos + sizeof(struct ieee80211_vht_operation);
}

u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef)
{
        struct ieee80211_he_operation *he_oper;
        struct ieee80211_he_6ghz_oper *he_6ghz_op;
        struct cfg80211_chan_def he_chandef;
        u32 he_oper_params;
        u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);

        if (chandef->chan->band == NL80211_BAND_6GHZ)
                ie_len += sizeof(struct ieee80211_he_6ghz_oper);

        *pos++ = WLAN_EID_EXTENSION;
        *pos++ = ie_len;
        *pos++ = WLAN_EID_EXT_HE_OPERATION;

        he_oper_params = 0;
        he_oper_params |= u32_encode_bits(1023, /* disabled */
                                IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
        he_oper_params |= u32_encode_bits(1,
                                IEEE80211_HE_OPERATION_ER_SU_DISABLE);
        he_oper_params |= u32_encode_bits(1,
                                IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
        if (chandef->chan->band == NL80211_BAND_6GHZ)
                he_oper_params |= u32_encode_bits(1,
                                IEEE80211_HE_OPERATION_6GHZ_OP_INFO);

        he_oper = (struct ieee80211_he_operation *)pos;
        he_oper->he_oper_params = cpu_to_le32(he_oper_params);

        /* don't require special HE peer rates */
        he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
        pos += sizeof(struct ieee80211_he_operation);

        if (chandef->chan->band != NL80211_BAND_6GHZ)
                goto out;

        cfg80211_chandef_create(&he_chandef, chandef->chan, NL80211_CHAN_NO_HT);
        he_chandef.center_freq1 = chandef->center_freq1;
        he_chandef.center_freq2 = chandef->center_freq2;
        he_chandef.width = chandef->width;

        /* TODO add VHT operational */
        he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
        he_6ghz_op->minrate = 6; /* 6 Mbps */
        he_6ghz_op->primary =
                ieee80211_frequency_to_channel(he_chandef.chan->center_freq);
        he_6ghz_op->ccfs0 =
                ieee80211_frequency_to_channel(he_chandef.center_freq1);
        if (he_chandef.center_freq2)
                he_6ghz_op->ccfs1 =
                        ieee80211_frequency_to_channel(he_chandef.center_freq2);
        else
                he_6ghz_op->ccfs1 = 0;

        switch (he_chandef.width) {
        case NL80211_CHAN_WIDTH_320:
                /* Downgrade EHT 320 MHz BW to 160 MHz for HE and set new
                 * center_freq1
                 */
                ieee80211_chandef_downgrade(&he_chandef, NULL);
                he_6ghz_op->ccfs0 =
                        ieee80211_frequency_to_channel(he_chandef.center_freq1);
                fallthrough;
        case NL80211_CHAN_WIDTH_160:
                /* Convert 160 MHz channel width to new style as interop
                 * workaround.
                 */
                he_6ghz_op->control =
                        IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
                he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
                if (he_chandef.chan->center_freq < he_chandef.center_freq1)
                        he_6ghz_op->ccfs0 -= 8;
                else
                        he_6ghz_op->ccfs0 += 8;
                fallthrough;
        case NL80211_CHAN_WIDTH_80P80:
                he_6ghz_op->control =
                        IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
                break;
        case NL80211_CHAN_WIDTH_80:
                he_6ghz_op->control =
                        IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
                break;
        case NL80211_CHAN_WIDTH_40:
                he_6ghz_op->control =
                        IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
                break;
        default:
                he_6ghz_op->control =
                        IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
                break;
        }

        pos += sizeof(struct ieee80211_he_6ghz_oper);

out:
        return pos;
}

u8 *ieee80211_ie_build_eht_oper(u8 *pos, const struct cfg80211_chan_def *chandef,
                                const struct ieee80211_sta_eht_cap *eht_cap)

{
        const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss =
                                        &eht_cap->eht_mcs_nss_supp.only_20mhz;
        struct ieee80211_eht_operation *eht_oper;
        struct ieee80211_eht_operation_info *eht_oper_info;
        u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional);
        u8 eht_oper_info_len =
                offsetof(struct ieee80211_eht_operation_info, optional);
        u8 chan_width = 0;

        *pos++ = WLAN_EID_EXTENSION;
        *pos++ = 1 + eht_oper_len + eht_oper_info_len;
        *pos++ = WLAN_EID_EXT_EHT_OPERATION;

        eht_oper = (struct ieee80211_eht_operation *)pos;

        memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss));
        eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT;
        pos += eht_oper_len;

        eht_oper_info =
                (struct ieee80211_eht_operation_info *)eht_oper->optional;

        eht_oper_info->ccfs0 =
                ieee80211_frequency_to_channel(chandef->center_freq1);
        if (chandef->center_freq2)
                eht_oper_info->ccfs1 =
                        ieee80211_frequency_to_channel(chandef->center_freq2);
        else
                eht_oper_info->ccfs1 = 0;

        switch (chandef->width) {
        case NL80211_CHAN_WIDTH_320:
                chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
                eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
                if (chandef->chan->center_freq < chandef->center_freq1)
                        eht_oper_info->ccfs0 -= 16;
                else
                        eht_oper_info->ccfs0 += 16;
                break;
        case NL80211_CHAN_WIDTH_160:
                eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
                if (chandef->chan->center_freq < chandef->center_freq1)
                        eht_oper_info->ccfs0 -= 8;
                else
                        eht_oper_info->ccfs0 += 8;
                fallthrough;
        case NL80211_CHAN_WIDTH_80P80:
                chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ;
                break;
        case NL80211_CHAN_WIDTH_80:
                chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ;
                break;
        case NL80211_CHAN_WIDTH_40:
                chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ;
                break;
        default:
                chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ;
                break;
        }
        eht_oper_info->control = chan_width;
        pos += eht_oper_info_len;

        /* TODO: eht_oper_info->optional */

        return pos;
}

bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
                               struct cfg80211_chan_def *chandef)
{
        enum nl80211_channel_type channel_type;

        if (!ht_oper)
                return false;

        switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
        case IEEE80211_HT_PARAM_CHA_SEC_NONE:
                channel_type = NL80211_CHAN_HT20;
                break;
        case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
                channel_type = NL80211_CHAN_HT40PLUS;
                break;
        case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
                channel_type = NL80211_CHAN_HT40MINUS;
                break;
        default:
                return false;
        }

        cfg80211_chandef_create(chandef, chandef->chan, channel_type);
        return true;
}

bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
                                const struct ieee80211_vht_operation *oper,
                                const struct ieee80211_ht_operation *htop,
                                struct cfg80211_chan_def *chandef)
{
        struct cfg80211_chan_def new = *chandef;
        int cf0, cf1;
        int ccfs0, ccfs1, ccfs2;
        int ccf0, ccf1;
        u32 vht_cap;
        bool support_80_80 = false;
        bool support_160 = false;
        u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
                                          IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
        u8 supp_chwidth = u32_get_bits(vht_cap_info,
                                       IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);

        if (!oper || !htop)
                return false;

        vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
        support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
                                  IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
        support_80_80 = ((vht_cap &
                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
                        (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
                         vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
                        ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
                                    IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
        ccfs0 = oper->center_freq_seg0_idx;
        ccfs1 = oper->center_freq_seg1_idx;
        ccfs2 = (le16_to_cpu(htop->operation_mode) &
                                IEEE80211_HT_OP_MODE_CCFS2_MASK)
                        >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;

        ccf0 = ccfs0;

        /* if not supported, parse as though we didn't understand it */
        if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
                ext_nss_bw_supp = 0;

        /*
         * Cf. IEEE 802.11 Table 9-250
         *
         * We really just consider that because it's inefficient to connect
         * at a higher bandwidth than we'll actually be able to use.
         */
        switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
        default:
        case 0x00:
                ccf1 = 0;
                support_160 = false;
                support_80_80 = false;
                break;
        case 0x01:
                support_80_80 = false;
                fallthrough;
        case 0x02:
        case 0x03:
                ccf1 = ccfs2;
                break;
        case 0x10:
                ccf1 = ccfs1;
                break;
        case 0x11:
        case 0x12:
                if (!ccfs1)
                        ccf1 = ccfs2;
                else
                        ccf1 = ccfs1;
                break;
        case 0x13:
        case 0x20:
        case 0x23:
                ccf1 = ccfs1;
                break;
        }

        cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
        cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);

        switch (oper->chan_width) {
        case IEEE80211_VHT_CHANWIDTH_USE_HT:
                /* just use HT information directly */
                break;
        case IEEE80211_VHT_CHANWIDTH_80MHZ:
                new.width = NL80211_CHAN_WIDTH_80;
                new.center_freq1 = cf0;
                /* If needed, adjust based on the newer interop workaround. */
                if (ccf1) {
                        unsigned int diff;

                        diff = abs(ccf1 - ccf0);
                        if ((diff == 8) && support_160) {
                                new.width = NL80211_CHAN_WIDTH_160;
                                new.center_freq1 = cf1;
                        } else if ((diff > 8) && support_80_80) {
                                new.width = NL80211_CHAN_WIDTH_80P80;
                                new.center_freq2 = cf1;
                        }
                }
                break;
        case IEEE80211_VHT_CHANWIDTH_160MHZ:
                /* deprecated encoding */
                new.width = NL80211_CHAN_WIDTH_160;
                new.center_freq1 = cf0;
                break;
        case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
                /* deprecated encoding */
                new.width = NL80211_CHAN_WIDTH_80P80;
                new.center_freq1 = cf0;
                new.center_freq2 = cf1;
                break;
        default:
                return false;
        }

        if (!cfg80211_chandef_valid(&new))
                return false;

        *chandef = new;
        return true;
}

void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info,
                                struct cfg80211_chan_def *chandef)
{
        chandef->center_freq1 =
                ieee80211_channel_to_frequency(info->ccfs0,
                                               chandef->chan->band);

        switch (u8_get_bits(info->control,
                            IEEE80211_EHT_OPER_CHAN_WIDTH)) {
        case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
                chandef->width = NL80211_CHAN_WIDTH_20;
                break;
        case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
                chandef->width = NL80211_CHAN_WIDTH_40;
                break;
        case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
                chandef->width = NL80211_CHAN_WIDTH_80;
                break;
        case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
                chandef->width = NL80211_CHAN_WIDTH_160;
                chandef->center_freq1 =
                        ieee80211_channel_to_frequency(info->ccfs1,
                                                       chandef->chan->band);
                break;
        case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
                chandef->width = NL80211_CHAN_WIDTH_320;
                chandef->center_freq1 =
                        ieee80211_channel_to_frequency(info->ccfs1,
                                                       chandef->chan->band);
                break;
        }
}

bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_local *local,
                                    const struct ieee80211_he_operation *he_oper,
                                    const struct ieee80211_eht_operation *eht_oper,
                                    struct cfg80211_chan_def *chandef)
{
        struct cfg80211_chan_def he_chandef = *chandef;
        const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
        u32 freq;

        if (chandef->chan->band != NL80211_BAND_6GHZ)
                return true;

        if (!he_oper)
                return false;

        he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
        if (!he_6ghz_oper)
                return false;

        /*
         * The EHT operation IE does not contain the primary channel so the
         * primary channel frequency should be taken from the 6 GHz operation
         * information.
         */
        freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
                                              NL80211_BAND_6GHZ);
        he_chandef.chan = ieee80211_get_channel(local->hw.wiphy, freq);

        if (!he_chandef.chan)
                return false;

        if (!eht_oper ||
            !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
                switch (u8_get_bits(he_6ghz_oper->control,
                                    IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
                case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
                        he_chandef.width = NL80211_CHAN_WIDTH_20;
                        break;
                case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
                        he_chandef.width = NL80211_CHAN_WIDTH_40;
                        break;
                case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
                        he_chandef.width = NL80211_CHAN_WIDTH_80;
                        break;
                case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
                        he_chandef.width = NL80211_CHAN_WIDTH_80;
                        if (!he_6ghz_oper->ccfs1)
                                break;
                        if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8)
                                he_chandef.width = NL80211_CHAN_WIDTH_160;
                        else
                                he_chandef.width = NL80211_CHAN_WIDTH_80P80;
                        break;
                }

                if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
                        he_chandef.center_freq1 =
                                ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
                                                               NL80211_BAND_6GHZ);
                } else {
                        he_chandef.center_freq1 =
                                ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
                                                               NL80211_BAND_6GHZ);
                        he_chandef.center_freq2 =
                                ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
                                                               NL80211_BAND_6GHZ);
                }
        } else {
                ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
                                           &he_chandef);
                he_chandef.punctured =
                        ieee80211_eht_oper_dis_subchan_bitmap(eht_oper);
        }

        if (!cfg80211_chandef_valid(&he_chandef))
                return false;

        *chandef = he_chandef;

        return true;
}

bool ieee80211_chandef_s1g_oper(struct ieee80211_local *local,
                                const struct ieee80211_s1g_oper_ie *oper,
                                struct cfg80211_chan_def *chandef)
{
        u32 oper_khz, pri_1mhz_khz, pri_2mhz_khz;

        if (!oper)
                return false;

        switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
        case IEEE80211_S1G_CHANWIDTH_1MHZ:
                chandef->width = NL80211_CHAN_WIDTH_1;
                break;
        case IEEE80211_S1G_CHANWIDTH_2MHZ:
                chandef->width = NL80211_CHAN_WIDTH_2;
                break;
        case IEEE80211_S1G_CHANWIDTH_4MHZ:
                chandef->width = NL80211_CHAN_WIDTH_4;
                break;
        case IEEE80211_S1G_CHANWIDTH_8MHZ:
                chandef->width = NL80211_CHAN_WIDTH_8;
                break;
        case IEEE80211_S1G_CHANWIDTH_16MHZ:
                chandef->width = NL80211_CHAN_WIDTH_16;
                break;
        default:
                return false;
        }

        chandef->s1g_primary_2mhz = false;

        switch (u8_get_bits(oper->ch_width, S1G_OPER_CH_WIDTH_PRIMARY)) {
        case IEEE80211_S1G_PRI_CHANWIDTH_1MHZ:
                pri_1mhz_khz = ieee80211_channel_to_freq_khz(
                        oper->primary_ch, NL80211_BAND_S1GHZ);
                break;
        case IEEE80211_S1G_PRI_CHANWIDTH_2MHZ:
                chandef->s1g_primary_2mhz = true;
                pri_2mhz_khz = ieee80211_channel_to_freq_khz(
                        oper->primary_ch, NL80211_BAND_S1GHZ);

                if (u8_get_bits(oper->ch_width, S1G_OPER_CH_PRIMARY_LOCATION) ==
                    S1G_2M_PRIMARY_LOCATION_LOWER)
                        pri_1mhz_khz = pri_2mhz_khz - 500;
                else
                        pri_1mhz_khz = pri_2mhz_khz + 500;
                break;
        default:
                return false;
        }

        oper_khz = ieee80211_channel_to_freq_khz(oper->oper_ch,
                                                 NL80211_BAND_S1GHZ);
        chandef->center_freq1 = KHZ_TO_MHZ(oper_khz);
        chandef->freq1_offset = oper_khz % 1000;
        chandef->chan =
                ieee80211_get_channel_khz(local->hw.wiphy, pri_1mhz_khz);

        return chandef->chan;
}

int ieee80211_put_srates_elem(struct sk_buff *skb,
                              const struct ieee80211_supported_band *sband,
                              u32 basic_rates, u32 masked_rates,
                              u8 element_id)
{
        u8 i, rates, skip;

        rates = 0;
        for (i = 0; i < sband->n_bitrates; i++) {
                if (masked_rates & BIT(i))
                        continue;
                rates++;
        }

        if (element_id == WLAN_EID_SUPP_RATES) {
                rates = min_t(u8, rates, 8);
                skip = 0;
        } else {
                skip = 8;
                if (rates <= skip)
                        return 0;
                rates -= skip;
        }

        if (skb_tailroom(skb) < rates + 2)
                return -ENOBUFS;

        skb_put_u8(skb, element_id);
        skb_put_u8(skb, rates);

        for (i = 0; i < sband->n_bitrates && rates; i++) {
                int rate;
                u8 basic;

                if (masked_rates & BIT(i))
                        continue;

                if (skip > 0) {
                        skip--;
                        continue;
                }

                basic = basic_rates & BIT(i) ? 0x80 : 0;

                rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
                skb_put_u8(skb, basic | (u8)rate);
                rates--;
        }

        WARN(rates > 0, "rates confused: rates:%d, element:%d\n",
             rates, element_id);

        return 0;
}

int ieee80211_ave_rssi(struct ieee80211_vif *vif, int link_id)
{
        struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
        struct ieee80211_link_data *link_data;

        if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
                return 0;

        if (link_id < 0)
                link_data = &sdata->deflink;
        else
                link_data = wiphy_dereference(sdata->local->hw.wiphy,
                                              sdata->link[link_id]);

        if (WARN_ON_ONCE(!link_data))
                return -99;

        return -ewma_beacon_signal_read(&link_data->u.mgd.ave_beacon_signal);
}
EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);

u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
{
        if (!mcs)
                return 1;

        /* TODO: consider rx_highest */

        if (mcs->rx_mask[3])
                return 4;
        if (mcs->rx_mask[2])
                return 3;
        if (mcs->rx_mask[1])
                return 2;
        return 1;
}

/**
 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
 * @local: mac80211 hw info struct
 * @status: RX status
 * @mpdu_len: total MPDU length (including FCS)
 * @mpdu_offset: offset into MPDU to calculate timestamp at
 *
 * This function calculates the RX timestamp at the given MPDU offset, taking
 * into account what the RX timestamp was. An offset of 0 will just normalize
 * the timestamp to TSF at beginning of MPDU reception.
 *
 * Returns: the calculated timestamp
 */
u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
                                     struct ieee80211_rx_status *status,
                                     unsigned int mpdu_len,
                                     unsigned int mpdu_offset)
{
        u64 ts = status->mactime;
        bool mactime_plcp_start;
        struct rate_info ri;
        u16 rate;
        u8 n_ltf;

        if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
                return 0;

        mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) ==
                                RX_FLAG_MACTIME_PLCP_START;

        memset(&ri, 0, sizeof(ri));

        ri.bw = status->bw;

        /* Fill cfg80211 rate info */
        switch (status->encoding) {
        case RX_ENC_EHT:
                ri.flags |= RATE_INFO_FLAGS_EHT_MCS;
                ri.mcs = status->rate_idx;
                ri.nss = status->nss;
                ri.eht_ru_alloc = status->eht.ru;
                if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
                        ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
                /* TODO/FIXME: is this right? handle other PPDUs */
                if (mactime_plcp_start) {
                        mpdu_offset += 2;
                        ts += 36;
                }
                break;
        case RX_ENC_HE:
                ri.flags |= RATE_INFO_FLAGS_HE_MCS;
                ri.mcs = status->rate_idx;
                ri.nss = status->nss;
                ri.he_ru_alloc = status->he_ru;
                if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
                        ri.flags |= RATE_INFO_FLAGS_SHORT_GI;

                /*
                 * See P802.11ax_D6.0, section 27.3.4 for
                 * VHT PPDU format.
                 */
                if (mactime_plcp_start) {
                        mpdu_offset += 2;
                        ts += 36;

                        /*
                         * TODO:
                         * For HE MU PPDU, add the HE-SIG-B.
                         * For HE ER PPDU, add 8us for the HE-SIG-A.
                         * For HE TB PPDU, add 4us for the HE-STF.
                         * Add the HE-LTF durations - variable.
                         */
                }

                break;
        case RX_ENC_HT:
                ri.mcs = status->rate_idx;
                ri.flags |= RATE_INFO_FLAGS_MCS;
                if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
                        ri.flags |= RATE_INFO_FLAGS_SHORT_GI;

                /*
                 * See P802.11REVmd_D3.0, section 19.3.2 for
                 * HT PPDU format.
                 */
                if (mactime_plcp_start) {
                        mpdu_offset += 2;
                        if (status->enc_flags & RX_ENC_FLAG_HT_GF)
                                ts += 24;
                        else
                                ts += 32;

                        /*
                         * Add Data HT-LTFs per streams
                         * TODO: add Extension HT-LTFs, 4us per LTF
                         */
                        n_ltf = ((ri.mcs >> 3) & 3) + 1;
                        n_ltf = n_ltf == 3 ? 4 : n_ltf;
                        ts += n_ltf * 4;
                }

                break;
        case RX_ENC_VHT:
                ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
                ri.mcs = status->rate_idx;
                ri.nss = status->nss;
                if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
                        ri.flags |= RATE_INFO_FLAGS_SHORT_GI;

                /*
                 * See P802.11REVmd_D3.0, section 21.3.2 for
                 * VHT PPDU format.
                 */
                if (mactime_plcp_start) {
                        mpdu_offset += 2;
                        ts += 36;

                        /*
                         * Add VHT-LTFs per streams
                         */
                        n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
                                ri.nss + 1 : ri.nss;
                        ts += 4 * n_ltf;
                }

                break;
        default:
                WARN_ON(1);
                fallthrough;
        case RX_ENC_LEGACY: {
                struct ieee80211_supported_band *sband;

                sband = local->hw.wiphy->bands[status->band];
                ri.legacy = sband->bitrates[status->rate_idx].bitrate;

                if (mactime_plcp_start) {
                        if (status->band == NL80211_BAND_5GHZ) {
                                ts += 20;
                                mpdu_offset += 2;
                        } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
                                ts += 96;
                        } else {
                                ts += 192;
                        }
                }
                break;
                }
        }

        rate = cfg80211_calculate_bitrate(&ri);
        if (WARN_ONCE(!rate,
                      "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
                      (unsigned long long)status->flag, status->rate_idx,
                      status->nss))
                return 0;

        /* rewind from end of MPDU */
        if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END)
                ts -= mpdu_len * 8 * 10 / rate;

        ts += mpdu_offset * 8 * 10 / rate;

        return ts;
}

/* Cancel CAC for the interfaces under the specified @local. If @ctx is
 * also provided, only the interfaces using that ctx will be canceled.
 */
void ieee80211_dfs_cac_cancel(struct ieee80211_local *local,
                              struct ieee80211_chanctx *ctx)
{
        struct ieee80211_sub_if_data *sdata;
        struct cfg80211_chan_def chandef;
        struct ieee80211_link_data *link;
        struct ieee80211_chanctx_conf *chanctx_conf;
        unsigned int link_id;

        lockdep_assert_wiphy(local->hw.wiphy);

        list_for_each_entry(sdata, &local->interfaces, list) {
                for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
                     link_id++) {
                        link = sdata_dereference(sdata->link[link_id],
                                                 sdata);
                        if (!link)
                                continue;

                        chanctx_conf = sdata_dereference(link->conf->chanctx_conf,
                                                         sdata);
                        if (ctx && &ctx->conf != chanctx_conf)
                                continue;

                        wiphy_hrtimer_work_cancel(local->hw.wiphy,
                                                  &link->dfs_cac_timer_work);

                        if (!sdata->wdev.links[link_id].cac_started)
                                continue;

                        chandef = link->conf->chanreq.oper;
                        ieee80211_link_release_channel(link);
                        cfg80211_cac_event(sdata->dev, &chandef,
                                           NL80211_RADAR_CAC_ABORTED,
                                           GFP_KERNEL, link_id);
                }
        }
}

void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy,
                                       struct wiphy_work *work)
{
        struct ieee80211_local *local =
                container_of(work, struct ieee80211_local, radar_detected_work);
        struct cfg80211_chan_def chandef;
        struct ieee80211_chanctx *ctx;

        lockdep_assert_wiphy(local->hw.wiphy);

        list_for_each_entry(ctx, &local->chanctx_list, list) {
                if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
                        continue;

                if (!ctx->radar_detected)
                        continue;

                ctx->radar_detected = false;

                chandef = ctx->conf.def;

                ieee80211_dfs_cac_cancel(local, ctx);
                cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
        }
}

static void
ieee80211_radar_mark_chan_ctx_iterator(struct ieee80211_hw *hw,
                                       struct ieee80211_chanctx_conf *chanctx_conf,
                                       void *data)
{
        struct ieee80211_chanctx *ctx =
                container_of(chanctx_conf, struct ieee80211_chanctx,
                             conf);

        if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
                return;

        if (data && data != chanctx_conf)
                return;

        ctx->radar_detected = true;
}

void ieee80211_radar_detected(struct ieee80211_hw *hw,
                              struct ieee80211_chanctx_conf *chanctx_conf)
{
        struct ieee80211_local *local = hw_to_local(hw);

        trace_api_radar_detected(local);

        ieee80211_iter_chan_contexts_atomic(hw, ieee80211_radar_mark_chan_ctx_iterator,
                                            chanctx_conf);

        wiphy_work_queue(hw->wiphy, &local->radar_detected_work);
}
EXPORT_SYMBOL(ieee80211_radar_detected);

void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c,
                                 struct ieee80211_conn_settings *conn)
{
        enum nl80211_chan_width new_primary_width;
        struct ieee80211_conn_settings _ignored = {};

        /* allow passing NULL if caller doesn't care */
        if (!conn)
                conn = &_ignored;

again:
        /* no-HT indicates nothing to do */
        new_primary_width = NL80211_CHAN_WIDTH_20_NOHT;

        switch (c->width) {
        default:
        case NL80211_CHAN_WIDTH_20_NOHT:
                WARN_ON_ONCE(1);
                fallthrough;
        case NL80211_CHAN_WIDTH_20:
                c->width = NL80211_CHAN_WIDTH_20_NOHT;
                conn->mode = IEEE80211_CONN_MODE_LEGACY;
                conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
                c->punctured = 0;
                break;
        case NL80211_CHAN_WIDTH_40:
                c->width = NL80211_CHAN_WIDTH_20;
                c->center_freq1 = c->chan->center_freq;
                if (conn->mode == IEEE80211_CONN_MODE_VHT)
                        conn->mode = IEEE80211_CONN_MODE_HT;
                conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
                c->punctured = 0;
                break;
        case NL80211_CHAN_WIDTH_80:
                new_primary_width = NL80211_CHAN_WIDTH_40;
                if (conn->mode == IEEE80211_CONN_MODE_VHT)
                        conn->mode = IEEE80211_CONN_MODE_HT;
                conn->bw_limit = IEEE80211_CONN_BW_LIMIT_40;
                break;
        case NL80211_CHAN_WIDTH_80P80:
                c->center_freq2 = 0;
                c->width = NL80211_CHAN_WIDTH_80;
                conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
                break;
        case NL80211_CHAN_WIDTH_160:
                new_primary_width = NL80211_CHAN_WIDTH_80;
                conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
                break;
        case NL80211_CHAN_WIDTH_320:
                new_primary_width = NL80211_CHAN_WIDTH_160;
                conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
                break;
        case NL80211_CHAN_WIDTH_1:
        case NL80211_CHAN_WIDTH_2:
        case NL80211_CHAN_WIDTH_4:
        case NL80211_CHAN_WIDTH_8:
        case NL80211_CHAN_WIDTH_16:
                WARN_ON_ONCE(1);
                /* keep c->width */
                conn->mode = IEEE80211_CONN_MODE_S1G;
                conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
                break;
        case NL80211_CHAN_WIDTH_5:
        case NL80211_CHAN_WIDTH_10:
                WARN_ON_ONCE(1);
                /* keep c->width */
                conn->mode = IEEE80211_CONN_MODE_LEGACY;
                conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
                break;
        }

        if (new_primary_width != NL80211_CHAN_WIDTH_20_NOHT) {
                c->center_freq1 = cfg80211_chandef_primary(c, new_primary_width,
                                                           &c->punctured);
                c->width = new_primary_width;
        }

        /*
         * With an 80 MHz channel, we might have the puncturing in the primary
         * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width.
         * In that case, downgrade again.
         */
        if (!cfg80211_chandef_valid(c) && c->punctured)
                goto again;

        WARN_ON_ONCE(!cfg80211_chandef_valid(c));
}

int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
                              struct cfg80211_csa_settings *csa_settings)
{
        struct sk_buff *skb;
        struct ieee80211_mgmt *mgmt;
        struct ieee80211_local *local = sdata->local;
        int freq;
        int hdr_len = offsetofend(struct ieee80211_mgmt,
                                  u.action.u.chan_switch);
        u8 *pos;

        if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
            sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        skb = dev_alloc_skb(local->tx_headroom + hdr_len +
                            5 + /* channel switch announcement element */
                            3 + /* secondary channel offset element */
                            5 + /* wide bandwidth channel switch announcement */
                            8); /* mesh channel switch parameters element */
        if (!skb)
                return -ENOMEM;

        skb_reserve(skb, local->tx_headroom);
        mgmt = skb_put_zero(skb, hdr_len);
        mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
                                          IEEE80211_STYPE_ACTION);

        eth_broadcast_addr(mgmt->da);
        memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
        if (ieee80211_vif_is_mesh(&sdata->vif)) {
                memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
        } else {
                struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
                memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
        }
        mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
        mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
        pos = skb_put(skb, 5);
        *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
        *pos++ = 3;                                             /* IE length */
        *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
        freq = csa_settings->chandef.chan->center_freq;
        *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
        *pos++ = csa_settings->count;                           /* count */

        if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
                enum nl80211_channel_type ch_type;

                skb_put(skb, 3);
                *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
                *pos++ = 1;                                     /* IE length */
                ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
                if (ch_type == NL80211_CHAN_HT40PLUS)
                        *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
                else
                        *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
        }

        if (ieee80211_vif_is_mesh(&sdata->vif)) {
                struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

                skb_put(skb, 8);
                *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
                *pos++ = 6;                                     /* IE length */
                *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
                *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
                *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
                *pos++ |= csa_settings->block_tx ?
                          WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
                put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
                pos += 2;
                put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
                pos += 2;
        }

        if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
            csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
            csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
                skb_put(skb, 5);
                ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
        }

        ieee80211_tx_skb(sdata, skb);
        return 0;
}

static bool
ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
{
        s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
        int skip;

        if (end > 0)
                return false;

        /* One shot NOA  */
        if (data->count[i] == 1)
                return false;

        if (data->desc[i].interval == 0)
                return false;

        /* End time is in the past, check for repetitions */
        skip = DIV_ROUND_UP(-end, data->desc[i].interval);
        if (data->count[i] < 255) {
                if (data->count[i] <= skip) {
                        data->count[i] = 0;
                        return false;
                }

                data->count[i] -= skip;
        }

        data->desc[i].start += skip * data->desc[i].interval;

        return true;
}

static bool
ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
                             s32 *offset)
{
        bool ret = false;
        int i;

        for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
                s32 cur;

                if (!data->count[i])
                        continue;

                if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
                        ret = true;

                cur = data->desc[i].start - tsf;
                if (cur > *offset)
                        continue;

                cur = data->desc[i].start + data->desc[i].duration - tsf;
                if (cur > *offset)
                        *offset = cur;
        }

        return ret;
}

static u32
ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
{
        s32 offset = 0;
        int tries = 0;
        /*
         * arbitrary limit, used to avoid infinite loops when combined NoA
         * descriptors cover the full time period.
         */
        int max_tries = 5;

        ieee80211_extend_absent_time(data, tsf, &offset);
        do {
                if (!ieee80211_extend_absent_time(data, tsf, &offset))
                        break;

                tries++;
        } while (tries < max_tries);

        return offset;
}

void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
{
        u32 next_offset = BIT(31) - 1;
        int i;

        data->absent = 0;
        data->has_next_tsf = false;
        for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
                s32 start;

                if (!data->count[i])
                        continue;

                ieee80211_extend_noa_desc(data, tsf, i);
                start = data->desc[i].start - tsf;
                if (start <= 0)
                        data->absent |= BIT(i);

                if (next_offset > start)
                        next_offset = start;

                data->has_next_tsf = true;
        }

        if (data->absent)
                next_offset = ieee80211_get_noa_absent_time(data, tsf);

        data->next_tsf = tsf + next_offset;
}
EXPORT_SYMBOL(ieee80211_update_p2p_noa);

int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
                            struct ieee80211_noa_data *data, u32 tsf)
{
        int ret = 0;
        int i;

        memset(data, 0, sizeof(*data));

        for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
                const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];

                if (!desc->count || !desc->duration)
                        continue;

                data->count[i] = desc->count;
                data->desc[i].start = le32_to_cpu(desc->start_time);
                data->desc[i].duration = le32_to_cpu(desc->duration);
                data->desc[i].interval = le32_to_cpu(desc->interval);

                if (data->count[i] > 1 &&
                    data->desc[i].interval < data->desc[i].duration)
                        continue;

                ieee80211_extend_noa_desc(data, tsf, i);
                ret++;
        }

        if (ret)
                ieee80211_update_p2p_noa(data, tsf);

        return ret;
}
EXPORT_SYMBOL(ieee80211_parse_p2p_noa);

void ieee80211_recalc_dtim(struct ieee80211_sub_if_data *sdata, u64 tsf)
{
        u64 dtim_count = 0;
        u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
        u8 dtim_period = sdata->vif.bss_conf.dtim_period;
        struct ps_data *ps;
        u8 bcns_from_dtim;

        if (tsf == -1ULL || !beacon_int || !dtim_period)
                return;

        if (sdata->vif.type == NL80211_IFTYPE_AP ||
            sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
                if (!sdata->bss)
                        return;

                ps = &sdata->bss->ps;
        } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
                ps = &sdata->u.mesh.ps;
        } else {
                return;
        }

        /*
         * actually finds last dtim_count, mac80211 will update in
         * __beacon_add_tim().
         * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
         */
        do_div(tsf, beacon_int);
        bcns_from_dtim = do_div(tsf, dtim_period);
        /* just had a DTIM */
        if (!bcns_from_dtim)
                dtim_count = 0;
        else
                dtim_count = dtim_period - bcns_from_dtim;

        ps->dtim_count = dtim_count;
}

/*
 * Given a long beacon period, calculate the current index into
 * that period to determine the number of TSBTTs until the next TBTT.
 * It is completely valid to have a short beacon period that differs
 * from the dtim period (i.e a TBTT thats not a DTIM).
 */
void ieee80211_recalc_sb_count(struct ieee80211_sub_if_data *sdata, u64 tsf)
{
        u32 sb_idx;
        struct ps_data *ps = &sdata->bss->ps;
        u8 lb_period = sdata->vif.bss_conf.s1g_long_beacon_period;
        u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;

        /* No mesh / IBSS support for short beaconing */
        if (tsf == -1ULL || !lb_period ||
            (sdata->vif.type != NL80211_IFTYPE_AP &&
             sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
                return;

        /* find the current TSBTT index in our lb_period */
        do_div(tsf, beacon_int);
        sb_idx = do_div(tsf, lb_period);

        /* num TSBTTs until the next TBTT */
        ps->sb_count = sb_idx ? lb_period - sb_idx : 0;
}

static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
                                         struct ieee80211_chanctx *ctx)
{
        struct ieee80211_link_data *link;
        u8 radar_detect = 0;

        lockdep_assert_wiphy(local->hw.wiphy);

        if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
                return 0;

        for_each_sdata_link(local, link) {
                if (rcu_access_pointer(link->conf->chanctx_conf) == &ctx->conf) {
                        /*
                         * An in-place reservation context should not have any
                         * assigned links until it replaces the other context.
                         */
                        WARN_ON(ctx->replace_state ==
                                IEEE80211_CHANCTX_REPLACES_OTHER);

                        if (link->radar_required)
                                radar_detect |=
                                        BIT(link->conf->chanreq.oper.width);
                }

                if (link->reserved_chanctx == ctx &&
                    link->reserved_radar_required)
                        radar_detect |= BIT(link->reserved.oper.width);
        }

        return radar_detect;
}

bool ieee80211_is_radio_idx_in_scan_req(struct wiphy *wiphy,
                                        struct cfg80211_scan_request *scan_req,
                                        int radio_idx)
{
        struct ieee80211_channel *chan;
        int i, chan_radio_idx;

        for (i = 0; i < scan_req->n_channels; i++) {
                chan = scan_req->channels[i];
                chan_radio_idx = cfg80211_get_radio_idx_by_chan(wiphy, chan);

                /* The radio index either matched successfully, or an error
                 * occurred. For example, if radio-level information is
                 * missing, the same error value is returned. This
                 * typically implies a single-radio setup, in which case
                 * the operation should not be allowed.
                 */
                if (chan_radio_idx == radio_idx)
                        return true;
        }

        return false;
}

static u32
__ieee80211_get_radio_mask(struct ieee80211_sub_if_data *sdata)
{
        struct ieee80211_bss_conf *link_conf;
        struct ieee80211_chanctx_conf *conf;
        unsigned int link_id;
        u32 mask = 0;

        for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
                conf = sdata_dereference(link_conf->chanctx_conf, sdata);
                if (!conf || conf->radio_idx < 0)
                        continue;

                mask |= BIT(conf->radio_idx);
        }

        return mask;
}

u32 ieee80211_get_radio_mask(struct wiphy *wiphy, struct net_device *dev)
{
        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

        return __ieee80211_get_radio_mask(sdata);
}

static bool
ieee80211_sdata_uses_radio(struct ieee80211_sub_if_data *sdata, int radio_idx)
{
        if (radio_idx < 0)
                return true;

        return __ieee80211_get_radio_mask(sdata) & BIT(radio_idx);
}

static int
ieee80211_fill_ifcomb_params(struct ieee80211_local *local,
                             struct iface_combination_params *params,
                             const struct cfg80211_chan_def *chandef,
                             struct ieee80211_sub_if_data *sdata)
{
        struct ieee80211_sub_if_data *sdata_iter;
        struct ieee80211_chanctx *ctx;
        int total = !!sdata;

        list_for_each_entry(ctx, &local->chanctx_list, list) {
                if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
                        continue;

                if (params->radio_idx >= 0 &&
                    ctx->conf.radio_idx != params->radio_idx)
                        continue;

                params->radar_detect |=
                        ieee80211_chanctx_radar_detect(local, ctx);

                if (chandef && ctx->mode != IEEE80211_CHANCTX_EXCLUSIVE &&
                    cfg80211_chandef_compatible(chandef, &ctx->conf.def))
                        continue;

                params->num_different_channels++;
        }

        list_for_each_entry(sdata_iter, &local->interfaces, list) {
                struct wireless_dev *wdev_iter;

                wdev_iter = &sdata_iter->wdev;

                if (sdata_iter == sdata ||
                    !ieee80211_sdata_running(sdata_iter) ||
                    cfg80211_iftype_allowed(local->hw.wiphy,
                                            wdev_iter->iftype, 0, 1))
                        continue;

                if (!ieee80211_sdata_uses_radio(sdata_iter, params->radio_idx))
                        continue;

                params->iftype_num[wdev_iter->iftype]++;
                total++;
        }

        return total;
}

int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
                                 const struct cfg80211_chan_def *chandef,
                                 enum ieee80211_chanctx_mode chanmode,
                                 u8 radar_detect, int radio_idx)
{
        bool shared = chanmode == IEEE80211_CHANCTX_SHARED;
        struct ieee80211_local *local = sdata->local;
        enum nl80211_iftype iftype = sdata->wdev.iftype;
        struct iface_combination_params params = {
                .radar_detect = radar_detect,
                .radio_idx = radio_idx,
        };
        int total;

        lockdep_assert_wiphy(local->hw.wiphy);

        if (WARN_ON(hweight32(radar_detect) > 1))
                return -EINVAL;

        if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
                    !chandef->chan))
                return -EINVAL;

        if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
                return -EINVAL;

        if (sdata->vif.type == NL80211_IFTYPE_AP ||
            sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
                /*
                 * always passing this is harmless, since it'll be the
                 * same value that cfg80211 finds if it finds the same
                 * interface ... and that's always allowed
                 */
                params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
        }

        /* Always allow software iftypes */
        if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
                if (radar_detect)
                        return -EINVAL;
                return 0;
        }

        if (chandef)
                params.num_different_channels = 1;

        if (iftype != NL80211_IFTYPE_UNSPECIFIED)
                params.iftype_num[iftype] = 1;

        total = ieee80211_fill_ifcomb_params(local, &params,
                                             shared ? chandef : NULL,
                                             sdata);
        if (total == 1 && !params.radar_detect)
                return 0;

        return cfg80211_check_combinations(local->hw.wiphy, &params);
}

static void
ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
                         void *data)
{
        u32 *max_num_different_channels = data;

        *max_num_different_channels = max(*max_num_different_channels,
                                          c->num_different_channels);
}

int ieee80211_max_num_channels(struct ieee80211_local *local, int radio_idx)
{
        u32 max_num_different_channels = 1;
        int err;
        struct iface_combination_params params = {
                .radio_idx = radio_idx,
        };

        lockdep_assert_wiphy(local->hw.wiphy);

        ieee80211_fill_ifcomb_params(local, &params, NULL, NULL);

        err = cfg80211_iter_combinations(local->hw.wiphy, &params,
                                         ieee80211_iter_max_chans,
                                         &max_num_different_channels);
        if (err < 0)
                return err;

        return max_num_different_channels;
}

void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
                                struct ieee80211_sta_s1g_cap *caps,
                                struct sk_buff *skb)
{
        struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
        struct ieee80211_s1g_cap s1g_capab;
        u8 *pos;
        int i;

        if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
                return;

        if (!caps->s1g)
                return;

        memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
        memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));

        /* override the capability info */
        for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
                u8 mask = ifmgd->s1g_capa_mask.capab_info[i];

                s1g_capab.capab_info[i] &= ~mask;
                s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
        }

        /* then MCS and NSS set */
        for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
                u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];

                s1g_capab.supp_mcs_nss[i] &= ~mask;
                s1g_capab.supp_mcs_nss[i] |=
                        ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
        }

        pos = skb_put(skb, 2 + sizeof(s1g_capab));
        *pos++ = WLAN_EID_S1G_CAPABILITIES;
        *pos++ = sizeof(s1g_capab);

        memcpy(pos, &s1g_capab, sizeof(s1g_capab));
}

void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
                                  struct sk_buff *skb)
{
        u8 *pos = skb_put(skb, 3);

        *pos++ = WLAN_EID_AID_REQUEST;
        *pos++ = 1;
        *pos++ = 0;
}

u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
{
        *buf++ = WLAN_EID_VENDOR_SPECIFIC;
        *buf++ = 7; /* len */
        *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
        *buf++ = 0x50;
        *buf++ = 0xf2;
        *buf++ = 2; /* WME */
        *buf++ = 0; /* WME info */
        *buf++ = 1; /* WME ver */
        *buf++ = qosinfo; /* U-APSD no in use */

        return buf;
}

void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
                             unsigned long *frame_cnt,
                             unsigned long *byte_cnt)
{
        struct txq_info *txqi = to_txq_info(txq);
        u32 frag_cnt = 0, frag_bytes = 0;
        struct sk_buff *skb;

        skb_queue_walk(&txqi->frags, skb) {
                frag_cnt++;
                frag_bytes += skb->len;
        }

        if (frame_cnt)
                *frame_cnt = txqi->tin.backlog_packets + frag_cnt;

        if (byte_cnt)
                *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
}
EXPORT_SYMBOL(ieee80211_txq_get_depth);

const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
        IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
        IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
        IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
        IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
};

u16 ieee80211_encode_usf(int listen_interval)
{
        static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
        u16 ui, usf = 0;

        /* find greatest USF */
        while (usf < IEEE80211_MAX_USF) {
                if (listen_interval % listen_int_usf[usf + 1])
                        break;
                usf += 1;
        }
        ui = listen_interval / listen_int_usf[usf];

        /* error if there is a remainder. Should've been checked by user */
        WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
        listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
                          FIELD_PREP(LISTEN_INT_UI, ui);

        return (u16) listen_interval;
}

/* this may return more than ieee80211_put_eht_cap() will need */
u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata)
{
        const struct ieee80211_sta_he_cap *he_cap;
        const struct ieee80211_sta_eht_cap *eht_cap;
        struct ieee80211_supported_band *sband;
        bool is_ap;
        u8 n;

        sband = ieee80211_get_sband(sdata);
        if (!sband)
                return 0;

        he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
        eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
        if (!he_cap || !eht_cap)
                return 0;

        is_ap = sdata->vif.type == NL80211_IFTYPE_AP;

        n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
                                       &eht_cap->eht_cap_elem,
                                       is_ap);
        return 2 + 1 +
               sizeof(eht_cap->eht_cap_elem) + n +
               ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
                                      eht_cap->eht_cap_elem.phy_cap_info);
        return 0;
}

int ieee80211_put_eht_cap(struct sk_buff *skb,
                          struct ieee80211_sub_if_data *sdata,
                          const struct ieee80211_supported_band *sband,
                          const struct ieee80211_conn_settings *conn)
{
        const struct ieee80211_sta_he_cap *he_cap =
                ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
        const struct ieee80211_sta_eht_cap *eht_cap =
                ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
        bool for_ap = sdata->vif.type == NL80211_IFTYPE_AP;
        struct ieee80211_eht_cap_elem_fixed fixed;
        struct ieee80211_he_cap_elem he;
        u8 mcs_nss_len, ppet_len;
        u8 orig_mcs_nss_len;
        u8 ie_len;

        if (!conn)
                conn = &ieee80211_conn_settings_unlimited;

        /* Make sure we have place for the IE */
        if (!he_cap || !eht_cap)
                return 0;

        orig_mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
                                                      &eht_cap->eht_cap_elem,
                                                      for_ap);

        ieee80211_get_adjusted_he_cap(conn, he_cap, &he);

        fixed = eht_cap->eht_cap_elem;

        if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_80)
                fixed.phy_cap_info[6] &=
                        ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ;

        if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
                fixed.phy_cap_info[1] &=
                        ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_160MHZ_MASK;
                fixed.phy_cap_info[2] &=
                        ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_160MHZ_MASK;
                fixed.phy_cap_info[6] &=
                        ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ;
        }

        if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320) {
                fixed.phy_cap_info[0] &=
                        ~IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
                fixed.phy_cap_info[1] &=
                        ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_320MHZ_MASK;
                fixed.phy_cap_info[2] &=
                        ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_320MHZ_MASK;
                fixed.phy_cap_info[6] &=
                        ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ;
        }

        if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20)
                fixed.phy_cap_info[0] &=
                        ~IEEE80211_EHT_PHY_CAP0_242_TONE_RU_GT20MHZ;

        mcs_nss_len = ieee80211_eht_mcs_nss_size(&he, &fixed, for_ap);
        ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
                                          fixed.phy_cap_info);

        ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
        if (skb_tailroom(skb) < ie_len)
                return -ENOBUFS;

        skb_put_u8(skb, WLAN_EID_EXTENSION);
        skb_put_u8(skb, ie_len - 2);
        skb_put_u8(skb, WLAN_EID_EXT_EHT_CAPABILITY);
        skb_put_data(skb, &fixed, sizeof(fixed));

        if (mcs_nss_len == 4 && orig_mcs_nss_len != 4) {
                /*
                 * If the (non-AP) STA became 20 MHz only, then convert from
                 * <=80 to 20-MHz-only format, where MCSes are indicated in
                 * the groups 0-7, 8-9, 10-11, 12-13 rather than just 0-9,
                 * 10-11, 12-13. Thus, use 0-9 for 0-7 and 8-9.
                 */
                skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
                skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
                skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs11_max_nss);
                skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs13_max_nss);
        } else {
                skb_put_data(skb, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
        }

        if (ppet_len)
                skb_put_data(skb, &eht_cap->eht_ppe_thres, ppet_len);

        return 0;
}

int ieee80211_put_uhr_cap(struct sk_buff *skb,
                          struct ieee80211_sub_if_data *sdata,
                          const struct ieee80211_supported_band *sband)
{
        const struct ieee80211_sta_uhr_cap *uhr_cap =
                ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif);
        int len;

        if (!uhr_cap)
                return 0;

        len = 2 + 1 + sizeof(struct ieee80211_uhr_cap) +
              sizeof(struct ieee80211_uhr_cap_phy);

        if (skb_tailroom(skb) < len)
                return -ENOBUFS;

        skb_put_u8(skb, WLAN_EID_EXTENSION);
        skb_put_u8(skb, len - 2);
        skb_put_u8(skb, WLAN_EID_EXT_UHR_CAPA);
        skb_put_data(skb, &uhr_cap->mac, sizeof(uhr_cap->mac));
        skb_put_data(skb, &uhr_cap->phy, sizeof(uhr_cap->phy));

        return 0;
}

const char *ieee80211_conn_mode_str(enum ieee80211_conn_mode mode)
{
        static const char * const modes[] = {
                [IEEE80211_CONN_MODE_S1G] = "S1G",
                [IEEE80211_CONN_MODE_LEGACY] = "legacy",
                [IEEE80211_CONN_MODE_HT] = "HT",
                [IEEE80211_CONN_MODE_VHT] = "VHT",
                [IEEE80211_CONN_MODE_HE] = "HE",
                [IEEE80211_CONN_MODE_EHT] = "EHT",
                [IEEE80211_CONN_MODE_UHR] = "UHR",
        };

        if (WARN_ON(mode >= ARRAY_SIZE(modes)))
                return "<out of range>";

        return modes[mode] ?: "<missing string>";
}

enum ieee80211_conn_bw_limit
ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def *chandef)
{
        switch (chandef->width) {
        case NL80211_CHAN_WIDTH_20_NOHT:
        case NL80211_CHAN_WIDTH_20:
                return IEEE80211_CONN_BW_LIMIT_20;
        case NL80211_CHAN_WIDTH_40:
                return IEEE80211_CONN_BW_LIMIT_40;
        case NL80211_CHAN_WIDTH_80:
                return IEEE80211_CONN_BW_LIMIT_80;
        case NL80211_CHAN_WIDTH_80P80:
        case NL80211_CHAN_WIDTH_160:
                return IEEE80211_CONN_BW_LIMIT_160;
        case NL80211_CHAN_WIDTH_320:
                return IEEE80211_CONN_BW_LIMIT_320;
        default:
                WARN(1, "unhandled chandef width %d\n", chandef->width);
                return IEEE80211_CONN_BW_LIMIT_20;
        }
}

void ieee80211_clear_tpe(struct ieee80211_parsed_tpe *tpe)
{
        for (int i = 0; i < 2; i++) {
                tpe->max_local[i].valid = false;
                memset(tpe->max_local[i].power,
                       IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT,
                       sizeof(tpe->max_local[i].power));

                tpe->max_reg_client[i].valid = false;
                memset(tpe->max_reg_client[i].power,
                       IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT,
                       sizeof(tpe->max_reg_client[i].power));

                tpe->psd_local[i].valid = false;
                memset(tpe->psd_local[i].power,
                       IEEE80211_TPE_PSD_NO_LIMIT,
                       sizeof(tpe->psd_local[i].power));

                tpe->psd_reg_client[i].valid = false;
                memset(tpe->psd_reg_client[i].power,
                       IEEE80211_TPE_PSD_NO_LIMIT,
                       sizeof(tpe->psd_reg_client[i].power));
        }
}

bool ieee80211_vif_nan_started(struct ieee80211_vif *vif)
{
        struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

        return vif->type == NL80211_IFTYPE_NAN && sdata->u.nan.started;
}
EXPORT_SYMBOL_GPL(ieee80211_vif_nan_started);