Backports generated from 4.11 kernel

Initial commit.

Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>

1 files changed, 3471 insertions, 0 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
new file mode 100644
index 0000000..ac59fbd
--- /dev/null
+++ b/net/mac80211/util.c
@@ -0,0 +1,3471 @@
+/*
+ * 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) 2015-2016	Intel Deutschland GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 "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;
+	BUG_ON(!wiphy);
+
+	local = wiphy_priv(wiphy);
+	return &local->hw;
+}
+EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
+
+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 shift)
+{
+	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.
+	 *
+	 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
+	 * is assumed to be 0 otherwise.
+	 */
+
+	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 */
+
+		/* IEEE 802.11-2012 18.3.2.4: all values above are:
+		 *  * times 4 for 5 MHz
+		 *  * times 2 for 10 MHz
+		 */
+		dur *= 1 << shift;
+
+		/* 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, shift = 0;
+	bool short_preamble = false;
+
+	erp = 0;
+	if (vif) {
+		sdata = vif_to_sdata(vif);
+		short_preamble = sdata->vif.bss_conf.use_short_preamble;
+		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
+			erp = rate->flags & IEEE80211_RATE_ERP_G;
+		shift = ieee80211_vif_get_shift(vif);
+	}
+
+	dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
+				       short_preamble, shift);
+
+	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, shift = 0, 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->flags & IEEE80211_SDATA_OPERATING_GMODE)
+			erp = rate->flags & IEEE80211_RATE_ERP_G;
+		shift = ieee80211_vif_get_shift(vif);
+	}
+
+	bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
+
+	/* CTS duration */
+	dur = ieee80211_frame_duration(sband->band, 10, bitrate,
+				       erp, short_preamble, shift);
+	/* Data frame duration */
+	dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
+					erp, short_preamble, shift);
+	/* ACK duration */
+	dur += ieee80211_frame_duration(sband->band, 10, bitrate,
+					erp, short_preamble, shift);
+
+	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, shift = 0, 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->flags & IEEE80211_SDATA_OPERATING_GMODE)
+			erp = rate->flags & IEEE80211_RATE_ERP_G;
+		shift = ieee80211_vif_get_shift(vif);
+	}
+
+	bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
+
+	/* Data frame duration */
+	dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
+				       erp, short_preamble, shift);
+	if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
+		/* ACK duration */
+		dur += ieee80211_frame_duration(sband->band, 10, bitrate,
+						erp, short_preamble, shift);
+	}
+
+	return cpu_to_le16(dur);
+}
+EXPORT_SYMBOL(ieee80211_ctstoself_duration);
+
+void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
+{
+	struct ieee80211_sub_if_data *sdata;
+	int n_acs = IEEE80211_NUM_ACS;
+
+	if (local->ops->wake_tx_queue)
+		return;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		n_acs = 1;
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		int ac;
+
+		if (!sdata->dev)
+			continue;
+
+		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
+		    local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
+			continue;
+
+		for (ac = 0; ac < n_acs; ac++) {
+			int ac_queue = sdata->vif.hw_queue[ac];
+
+			if (ac_queue == queue ||
+			    (sdata->vif.cab_queue == queue &&
+			     local->queue_stop_reasons[ac_queue] == 0 &&
+			     skb_queue_empty(&local->pending[ac_queue])))
+				netif_wake_subqueue(sdata->dev, ac);
+		}
+	}
+}
+
+static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
+				   enum queue_stop_reason reason,
+				   bool refcounted)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_wake_queue(local, queue, reason);
+
+	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]);
+
+	if (local->queue_stop_reasons[queue] != 0)
+		/* someone still has this queue stopped */
+		return;
+
+	if (skb_queue_empty(&local->pending[queue])) {
+		rcu_read_lock();
+		ieee80211_propagate_queue_wake(local, queue);
+		rcu_read_unlock();
+	} else
+		tasklet_schedule(&local->tx_pending_tasklet);
+}
+
+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);
+	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);
+	struct ieee80211_sub_if_data *sdata;
+	int n_acs = IEEE80211_NUM_ACS;
+
+	trace_stop_queue(local, queue, reason);
+
+	if (WARN_ON(queue >= hw->queues))
+		return;
+
+	if (!refcounted)
+		local->q_stop_reasons[queue][reason] = 1;
+	else
+		local->q_stop_reasons[queue][reason]++;
+
+	if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
+		return;
+
+	if (local->ops->wake_tx_queue)
+		return;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		n_acs = 1;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		int ac;
+
+		if (!sdata->dev)
+			continue;
+
+		for (ac = 0; ac < n_acs; ac++) {
+			if (sdata->vif.hw_queue[ac] == queue ||
+			    sdata->vif.cab_queue == queue)
+				netif_stop_subqueue(sdata->dev, ac);
+		}
+	}
+	rcu_read_unlock();
+}
+
+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);
+	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);
+	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);
+
+	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);
+
+static 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++)
+			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)
+		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);
+
+	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);
+}
+
+void ieee80211_stop_vif_queues(struct ieee80211_local *local,
+			       struct ieee80211_sub_if_data *sdata,
+			       enum queue_stop_reason reason)
+{
+	ieee80211_stop_queues_by_reason(&local->hw,
+					ieee80211_get_vif_queues(local, sdata),
+					reason, true);
+}
+
+void ieee80211_wake_vif_queues(struct ieee80211_local *local,
+			       struct ieee80211_sub_if_data *sdata,
+			       enum queue_stop_reason reason)
+{
+	ieee80211_wake_queues_by_reason(&local->hw,
+					ieee80211_get_vif_queues(local, sdata),
+					reason, true);
+}
+
+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) {
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_MONITOR:
+			if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
+				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 (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_rtnl_is_held());
+	if (sdata &&
+	    (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);
+
+void ieee80211_iterate_active_interfaces_rtnl(
+	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);
+
+	ASSERT_RTNL();
+
+	__iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
+			     iterator, data);
+}
+EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
+
+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) {
+		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_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)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	if (!vif)
+		return NULL;
+
+	sdata = vif_to_sdata(vif);
+
+	if (!ieee80211_sdata_running(sdata) ||
+	    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
+		return NULL;
+
+	return &sdata->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);
+
+u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
+			       struct ieee802_11_elems *elems,
+			       u64 filter, u32 crc)
+{
+	size_t left = len;
+	const u8 *pos = start;
+	bool calc_crc = filter != 0;
+	DECLARE_BITMAP(seen_elems, 256);
+	const u8 *ie;
+
+	bitmap_zero(seen_elems, 256);
+	memset(elems, 0, sizeof(*elems));
+	elems->ie_start = start;
+	elems->total_len = len;
+
+	while (left >= 2) {
+		u8 id, elen;
+		bool elem_parse_failed;
+
+		id = *pos++;
+		elen = *pos++;
+		left -= 2;
+
+		if (elen > left) {
+			elems->parse_error = true;
+			break;
+		}
+
+		switch (id) {
+		case WLAN_EID_SSID:
+		case WLAN_EID_SUPP_RATES:
+		case WLAN_EID_FH_PARAMS:
+		case WLAN_EID_DS_PARAMS:
+		case WLAN_EID_CF_PARAMS:
+		case WLAN_EID_TIM:
+		case WLAN_EID_IBSS_PARAMS:
+		case WLAN_EID_CHALLENGE:
+		case WLAN_EID_RSN:
+		case WLAN_EID_ERP_INFO:
+		case WLAN_EID_EXT_SUPP_RATES:
+		case WLAN_EID_HT_CAPABILITY:
+		case WLAN_EID_HT_OPERATION:
+		case WLAN_EID_VHT_CAPABILITY:
+		case WLAN_EID_VHT_OPERATION:
+		case WLAN_EID_MESH_ID:
+		case WLAN_EID_MESH_CONFIG:
+		case WLAN_EID_PEER_MGMT:
+		case WLAN_EID_PREQ:
+		case WLAN_EID_PREP:
+		case WLAN_EID_PERR:
+		case WLAN_EID_RANN:
+		case WLAN_EID_CHANNEL_SWITCH:
+		case WLAN_EID_EXT_CHANSWITCH_ANN:
+		case WLAN_EID_COUNTRY:
+		case WLAN_EID_PWR_CONSTRAINT:
+		case WLAN_EID_TIMEOUT_INTERVAL:
+		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
+		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
+		case WLAN_EID_CHAN_SWITCH_PARAM:
+		case WLAN_EID_EXT_CAPABILITY:
+		case WLAN_EID_CHAN_SWITCH_TIMING:
+		case WLAN_EID_LINK_ID:
+		/*
+		 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
+		 * that if the content gets bigger it might be needed more than once
+		 */
+			if (test_bit(id, seen_elems)) {
+				elems->parse_error = true;
+				left -= elen;
+				pos += elen;
+				continue;
+			}
+			break;
+		}
+
+		if (calc_crc && id < 64 && (filter & (1ULL << id)))
+			crc = crc32_be(crc, pos - 2, elen + 2);
+
+		elem_parse_failed = false;
+
+		switch (id) {
+		case WLAN_EID_LINK_ID:
+			if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->lnk_id = (void *)(pos - 2);
+			break;
+		case WLAN_EID_CHAN_SWITCH_TIMING:
+			if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->ch_sw_timing = (void *)pos;
+			break;
+		case WLAN_EID_EXT_CAPABILITY:
+			elems->ext_capab = pos;
+			elems->ext_capab_len = elen;
+			break;
+		case WLAN_EID_SSID:
+			elems->ssid = pos;
+			elems->ssid_len = elen;
+			break;
+		case WLAN_EID_SUPP_RATES:
+			elems->supp_rates = pos;
+			elems->supp_rates_len = elen;
+			break;
+		case WLAN_EID_DS_PARAMS:
+			if (elen >= 1)
+				elems->ds_params = pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_TIM:
+			if (elen >= sizeof(struct ieee80211_tim_ie)) {
+				elems->tim = (void *)pos;
+				elems->tim_len = elen;
+			} else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_CHALLENGE:
+			elems->challenge = pos;
+			elems->challenge_len = elen;
+			break;
+		case WLAN_EID_VENDOR_SPECIFIC:
+			if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
+			    pos[2] == 0xf2) {
+				/* Microsoft OUI (00:50:F2) */
+
+				if (calc_crc)
+					crc = crc32_be(crc, pos - 2, elen + 2);
+
+				if (elen >= 5 && pos[3] == 2) {
+					/* OUI Type 2 - WMM IE */
+					if (pos[4] == 0) {
+						elems->wmm_info = pos;
+						elems->wmm_info_len = elen;
+					} else if (pos[4] == 1) {
+						elems->wmm_param = pos;
+						elems->wmm_param_len = elen;
+					}
+				}
+			}
+			break;
+		case WLAN_EID_RSN:
+			elems->rsn = pos;
+			elems->rsn_len = elen;
+			break;
+		case WLAN_EID_ERP_INFO:
+			if (elen >= 1)
+				elems->erp_info = pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_EXT_SUPP_RATES:
+			elems->ext_supp_rates = pos;
+			elems->ext_supp_rates_len = elen;
+			break;
+		case WLAN_EID_HT_CAPABILITY:
+			if (elen >= sizeof(struct ieee80211_ht_cap))
+				elems->ht_cap_elem = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_HT_OPERATION:
+			if (elen >= sizeof(struct ieee80211_ht_operation))
+				elems->ht_operation = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_VHT_CAPABILITY:
+			if (elen >= sizeof(struct ieee80211_vht_cap))
+				elems->vht_cap_elem = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_VHT_OPERATION:
+			if (elen >= sizeof(struct ieee80211_vht_operation))
+				elems->vht_operation = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_OPMODE_NOTIF:
+			if (elen > 0)
+				elems->opmode_notif = pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_MESH_ID:
+			elems->mesh_id = pos;
+			elems->mesh_id_len = elen;
+			break;
+		case WLAN_EID_MESH_CONFIG:
+			if (elen >= sizeof(struct ieee80211_meshconf_ie))
+				elems->mesh_config = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_PEER_MGMT:
+			elems->peering = pos;
+			elems->peering_len = elen;
+			break;
+		case WLAN_EID_MESH_AWAKE_WINDOW:
+			if (elen >= 2)
+				elems->awake_window = (void *)pos;
+			break;
+		case WLAN_EID_PREQ:
+			elems->preq = pos;
+			elems->preq_len = elen;
+			break;
+		case WLAN_EID_PREP:
+			elems->prep = pos;
+			elems->prep_len = elen;
+			break;
+		case WLAN_EID_PERR:
+			elems->perr = pos;
+			elems->perr_len = elen;
+			break;
+		case WLAN_EID_RANN:
+			if (elen >= sizeof(struct ieee80211_rann_ie))
+				elems->rann = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		case WLAN_EID_CHANNEL_SWITCH:
+			if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->ch_switch_ie = (void *)pos;
+			break;
+		case WLAN_EID_EXT_CHANSWITCH_ANN:
+			if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->ext_chansw_ie = (void *)pos;
+			break;
+		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
+			if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->sec_chan_offs = (void *)pos;
+			break;
+		case WLAN_EID_CHAN_SWITCH_PARAM:
+			if (elen !=
+			    sizeof(*elems->mesh_chansw_params_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->mesh_chansw_params_ie = (void *)pos;
+			break;
+		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
+			if (!action ||
+			    elen != sizeof(*elems->wide_bw_chansw_ie)) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->wide_bw_chansw_ie = (void *)pos;
+			break;
+		case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
+			if (action) {
+				elem_parse_failed = true;
+				break;
+			}
+			/*
+			 * This is a bit tricky, but as we only care about
+			 * the wide bandwidth channel switch element, so
+			 * just parse it out manually.
+			 */
+			ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
+					      pos, elen);
+			if (ie) {
+				if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
+					elems->wide_bw_chansw_ie =
+						(void *)(ie + 2);
+				else
+					elem_parse_failed = true;
+			}
+			break;
+		case WLAN_EID_COUNTRY:
+			elems->country_elem = pos;
+			elems->country_elem_len = elen;
+			break;
+		case WLAN_EID_PWR_CONSTRAINT:
+			if (elen != 1) {
+				elem_parse_failed = true;
+				break;
+			}
+			elems->pwr_constr_elem = pos;
+			break;
+		case WLAN_EID_CISCO_VENDOR_SPECIFIC:
+			/* Lots of different options exist, but we only care
+			 * about the Dynamic Transmit Power Control element.
+			 * First check for the Cisco OUI, then for the DTPC
+			 * tag (0x00).
+			 */
+			if (elen < 4) {
+				elem_parse_failed = true;
+				break;
+			}
+
+			if (pos[0] != 0x00 || pos[1] != 0x40 ||
+			    pos[2] != 0x96 || pos[3] != 0x00)
+				break;
+
+			if (elen != 6) {
+				elem_parse_failed = true;
+				break;
+			}
+
+			if (calc_crc)
+				crc = crc32_be(crc, pos - 2, elen + 2);
+
+			elems->cisco_dtpc_elem = pos;
+			break;
+		case WLAN_EID_TIMEOUT_INTERVAL:
+			if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
+				elems->timeout_int = (void *)pos;
+			else
+				elem_parse_failed = true;
+			break;
+		default:
+			break;
+		}
+
+		if (elem_parse_failed)
+			elems->parse_error = true;
+		else
+			__set_bit(id, seen_elems);
+
+		left -= elen;
+		pos += elen;
+	}
+
+	if (left != 0)
+		elems->parse_error = true;
+
+	return crc;
+}
+
+void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
+			       bool bss_notify, bool enable_qos)
+{
+	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(sdata->vif.chanctx_conf);
+	use_11b = (chanctx_conf &&
+		   chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
+		 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
+	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;
+
+	/* Confiure 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;
+			}
+		}
+
+		qparam.uapsd = false;
+
+		sdata->tx_conf[ac] = qparam;
+		drv_conf_tx(local, sdata, ac, &qparam);
+	}
+
+	if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+	    sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
+	    sdata->vif.type != NL80211_IFTYPE_NAN) {
+		sdata->vif.bss_conf.qos = enable_qos;
+		if (bss_notify)
+			ieee80211_bss_info_change_notify(sdata,
+							 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;
+	int err;
+
+	/* 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);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
+
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
+	memset(mgmt, 0, 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)
+		memcpy(skb_put(skb, extra_len), extra, extra_len);
+
+	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);
+		WARN_ON(err);
+	}
+
+	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 *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, bssid, 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 */
+		memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
+		       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_build_preq_ies_band(struct ieee80211_local *local,
+					 u8 *buffer, size_t buffer_len,
+					 const u8 *ie, size_t ie_len,
+					 enum nl80211_band band,
+					 u32 rate_mask,
+					 struct cfg80211_chan_def *chandef,
+					 size_t *offset)
+{
+	struct ieee80211_supported_band *sband;
+	u8 *pos = buffer, *end = buffer + buffer_len;
+	size_t noffset;
+	int supp_rates_len, i;
+	u8 rates[32];
+	int num_rates;
+	int ext_rates_len;
+	int shift;
+	u32 rate_flags;
+	bool have_80mhz = false;
+
+	*offset = 0;
+
+	sband = local->hw.wiphy->bands[band];
+	if (WARN_ON_ONCE(!sband))
+		return 0;
+
+	rate_flags = ieee80211_chandef_rate_flags(chandef);
+	shift = ieee80211_chandef_get_shift(chandef);
+
+	num_rates = 0;
+	for (i = 0; i < sband->n_bitrates; i++) {
+		if ((BIT(i) & rate_mask) == 0)
+			continue; /* skip rate */
+		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+			continue;
+
+		rates[num_rates++] =
+			(u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
+					  (1 << shift) * 5);
+	}
+
+	supp_rates_len = min_t(int, num_rates, 8);
+
+	if (end - pos < 2 + supp_rates_len)
+		goto out_err;
+	*pos++ = WLAN_EID_SUPP_RATES;
+	*pos++ = supp_rates_len;
+	memcpy(pos, rates, supp_rates_len);
+	pos += supp_rates_len;
+
+	/* 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 (end - pos < noffset - *offset)
+			goto out_err;
+		memcpy(pos, ie + *offset, noffset - *offset);
+		pos += noffset - *offset;
+		*offset = noffset;
+	}
+
+	ext_rates_len = num_rates - supp_rates_len;
+	if (ext_rates_len > 0) {
+		if (end - pos < 2 + ext_rates_len)
+			goto out_err;
+		*pos++ = WLAN_EID_EXT_SUPP_RATES;
+		*pos++ = ext_rates_len;
+		memcpy(pos, rates + supp_rates_len, ext_rates_len);
+		pos += ext_rates_len;
+	}
+
+	if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
+		if (end - pos < 3)
+			goto out_err;
+		*pos++ = WLAN_EID_DS_PARAMS;
+		*pos++ = 1;
+		*pos++ = ieee80211_frequency_to_channel(
+				chandef->chan->center_freq);
+	}
+
+	/* insert custom IEs that go before HT */
+	if (ie && ie_len) {
+		static const u8 before_ht[] = {
+			WLAN_EID_SSID,
+			WLAN_EID_SUPP_RATES,
+			WLAN_EID_REQUEST,
+			WLAN_EID_EXT_SUPP_RATES,
+			WLAN_EID_DS_PARAMS,
+			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+		};
+		noffset = ieee80211_ie_split(ie, ie_len,
+					     before_ht, ARRAY_SIZE(before_ht),
+					     *offset);
+		if (end - pos < noffset - *offset)
+			goto out_err;
+		memcpy(pos, ie + *offset, noffset - *offset);
+		pos += noffset - *offset;
+		*offset = noffset;
+	}
+
+	if (sband->ht_cap.ht_supported) {
+		if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
+			goto out_err;
+		pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
+						sband->ht_cap.cap);
+	}
+
+	/*
+	 * If adding more here, adjust code in main.c
+	 * that calculates local->scan_ies_len.
+	 */
+
+	/* insert custom IEs that go before VHT */
+	if (ie && ie_len) {
+		static const u8 before_vht[] = {
+			WLAN_EID_SSID,
+			WLAN_EID_SUPP_RATES,
+			WLAN_EID_REQUEST,
+			WLAN_EID_EXT_SUPP_RATES,
+			WLAN_EID_DS_PARAMS,
+			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+			WLAN_EID_HT_CAPABILITY,
+			WLAN_EID_BSS_COEX_2040,
+			WLAN_EID_EXT_CAPABILITY,
+			WLAN_EID_SSID_LIST,
+			WLAN_EID_CHANNEL_USAGE,
+			WLAN_EID_INTERWORKING,
+			/* mesh ID can't happen here */
+			/* 60 GHz can't happen here right now */
+		};
+		noffset = ieee80211_ie_split(ie, ie_len,
+					     before_vht, ARRAY_SIZE(before_vht),
+					     *offset);
+		if (end - pos < noffset - *offset)
+			goto out_err;
+		memcpy(pos, ie + *offset, noffset - *offset);
+		pos += 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) {
+		if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
+			goto out_err;
+		pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
+						 sband->vht_cap.cap);
+	}
+
+	return pos - buffer;
+ out_err:
+	WARN_ONCE(1, "not enough space for preq IEs\n");
+	return pos - buffer;
+}
+
+int ieee80211_build_preq_ies(struct ieee80211_local *local, 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)
+{
+	size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
+	int i;
+
+	memset(ie_desc, 0, sizeof(*ie_desc));
+
+	for (i = 0; i < NUM_NL80211_BANDS; i++) {
+		if (bands_used & BIT(i)) {
+			pos += ieee80211_build_preq_ies_band(local,
+							     buffer + pos,
+							     buffer_len - pos,
+							     ie, ie_len, i,
+							     rate_masks[i],
+							     chandef,
+							     &custom_ie_offset);
+			ie_desc->ies[i] = buffer + old_pos;
+			ie_desc->len[i] = pos - old_pos;
+			old_pos = pos;
+		}
+	}
+
+	/* add any remaining custom IEs */
+	if (ie && ie_len) {
+		if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
+			      "not enough space for preq custom IEs\n"))
+			return pos;
+		memcpy(buffer + pos, ie + custom_ie_offset,
+		       ie_len - custom_ie_offset);
+		ie_desc->common_ies = buffer + pos;
+		ie_desc->common_ie_len = ie_len - custom_ie_offset;
+		pos += ie_len - custom_ie_offset;
+	}
+
+	return pos;
+};
+
+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,
+					  bool directed)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct cfg80211_chan_def chandef;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	int ies_len;
+	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.chandef.width;
+	if (directed)
+		chandef.chan = NULL;
+	else
+		chandef.chan = chan;
+
+	skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
+				     100 + ie_len);
+	if (!skb)
+		return NULL;
+
+	rate_masks[chan->band] = ratemask;
+	ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
+					   skb_tailroom(skb), &dummy_ie_desc,
+					   ie, ie_len, BIT(chan->band),
+					   rate_masks, &chandef);
+	skb_put(skb, ies_len);
+
+	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;
+}
+
+void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
+			      const u8 *src, const u8 *dst,
+			      const u8 *ssid, size_t ssid_len,
+			      const u8 *ie, size_t ie_len,
+			      u32 ratemask, bool directed, u32 tx_flags,
+			      struct ieee80211_channel *channel, bool scan)
+{
+	struct sk_buff *skb;
+
+	skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
+					ssid, ssid_len,
+					ie, ie_len, directed);
+	if (skb) {
+		IEEE80211_SKB_CB(skb)->flags |= tx_flags;
+		if (scan)
+			ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
+		else
+			ieee80211_tx_skb(sdata, 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, rate_flags;
+	int i, j, shift;
+	sband = sdata->local->hw.wiphy->bands[band];
+
+	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
+	shift = ieee80211_vif_get_shift(&sdata->vif);
+
+	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;
+			if ((rate_flags & sband->bitrates[j].flags)
+			    != rate_flags)
+				continue;
+
+			brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
+					     1 << shift);
+
+			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)
+{
+	ieee80211_led_radio(local, false);
+	ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
+
+	cancel_work_sync(&local->reconfig_filter);
+
+	flush_workqueue(local->workqueue);
+	drv_stop(local);
+}
+
+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);
+		ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
+		flush_delayed_work(&local->scan_work);
+	}
+}
+
+static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_chanctx *ctx;
+
+	/*
+	 * 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;
+
+	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...
+	 */
+	mutex_lock(&local->chanctx_mtx);
+	list_for_each_entry(ctx, &local->chanctx_list, list)
+		ctx->driver_present = false;
+	mutex_unlock(&local->chanctx_mtx);
+
+	cfg80211_shutdown_all_interfaces(local->hw.wiphy);
+}
+
+static void ieee80211_assign_chanctx(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_chanctx_conf *conf;
+	struct ieee80211_chanctx *ctx;
+
+	if (!local->use_chanctx)
+		return;
+
+	mutex_lock(&local->chanctx_mtx);
+	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					 lockdep_is_held(&local->chanctx_mtx));
+	if (conf) {
+		ctx = container_of(conf, struct ieee80211_chanctx, conf);
+		drv_assign_vif_chanctx(local, sdata, ctx);
+	}
+	mutex_unlock(&local->chanctx_mtx);
+}
+
+static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct sta_info *sta;
+
+	/* add STAs back */
+	mutex_lock(&local->sta_mtx);
+	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));
+	}
+	mutex_unlock(&local->sta_mtx);
+}
+
+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((sdata->local->hw.max_nan_de_entries + 1) *
+			sizeof(*funcs), GFP_KERNEL);
+	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;
+}
+
+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;
+
+	/* 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_handle_reconfig_failure(local);
+		return res;
+	}
+
+	/* setup fragmentation threshold */
+	drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
+
+	/* setup RTS threshold */
+	drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
+
+	/* reset coverage class */
+	drv_set_coverage_class(local, hw->wiphy->coverage_class);
+
+	ieee80211_led_radio(local, true);
+	ieee80211_mod_tpt_led_trig(local,
+				   IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
+
+	/* add interfaces */
+	sdata = rtnl_dereference(local->monitor_sdata);
+	if (sdata) {
+		/* 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_AP_VLAN &&
+		    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+		    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_AP_VLAN &&
+			    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+			    ieee80211_sdata_running(sdata))
+				drv_remove_interface(local, sdata);
+		ieee80211_handle_reconfig_failure(local);
+		return res;
+	}
+
+	/* add channel contexts */
+	if (local->use_chanctx) {
+		mutex_lock(&local->chanctx_mtx);
+		list_for_each_entry(ctx, &local->chanctx_list, list)
+			if (ctx->replace_state !=
+			    IEEE80211_CHANCTX_REPLACES_OTHER)
+				WARN_ON(drv_add_chanctx(local, ctx));
+		mutex_unlock(&local->chanctx_mtx);
+
+		sdata = rtnl_dereference(local->monitor_sdata);
+		if (sdata && ieee80211_sdata_running(sdata))
+			ieee80211_assign_chanctx(local, sdata);
+	}
+
+	/* reconfigure hardware */
+	ieee80211_hw_config(local, ~0);
+
+	ieee80211_configure_filter(local);
+
+	/* Finally also reconfigure all the BSS information */
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		u32 changed;
+
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+
+		ieee80211_assign_chanctx(local, sdata);
+
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_AP_VLAN:
+		case NL80211_IFTYPE_MONITOR:
+			break;
+		default:
+			ieee80211_reconfig_stations(sdata);
+			/* fall through */
+		case NL80211_IFTYPE_AP: /* AP stations are handled later */
+			for (i = 0; i < IEEE80211_NUM_ACS; i++)
+				drv_conf_tx(local, sdata, i,
+					    &sdata->tx_conf[i]);
+			break;
+		}
+
+		/* common change flags for all interface types */
+		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_IDLE |
+			  BSS_CHANGED_TXPOWER;
+
+		if (sdata->vif.mu_mimo_owner)
+			changed |= BSS_CHANGED_MU_GROUPS;
+
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_STATION:
+			changed |= BSS_CHANGED_ASSOC |
+				   BSS_CHANGED_ARP_FILTER |
+				   BSS_CHANGED_PS;
+
+			/* Re-send beacon info report to the driver */
+			if (sdata->u.mgd.have_beacon)
+				changed |= BSS_CHANGED_BEACON_INFO;
+
+			sdata_lock(sdata);
+			ieee80211_bss_info_change_notify(sdata, changed);
+			sdata_unlock(sdata);
+			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;
+			/* fall through */
+		case NL80211_IFTYPE_AP:
+			changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
+
+			if (sdata->vif.type == NL80211_IFTYPE_AP) {
+				changed |= BSS_CHANGED_AP_PROBE_RESP;
+
+				if (rcu_access_pointer(sdata->u.ap.beacon))
+					drv_start_ap(local, sdata);
+			}
+
+			/* fall through */
+		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_WDS:
+		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:
+			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 */
+	mutex_lock(&local->sta_mtx);
+	list_for_each_entry(sta, &local->sta_list, list) {
+		enum ieee80211_sta_state state;
+
+		if (!sta->uploaded)
+			continue;
+
+		if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
+			continue;
+
+		for (state = IEEE80211_STA_NOTEXIST;
+		     state < sta->sta_state; state++)
+			WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
+					      state + 1));
+	}
+	mutex_unlock(&local->sta_mtx);
+
+	/* add back keys */
+	list_for_each_entry(sdata, &local->interfaces, list)
+		ieee80211_reset_crypto_tx_tailroom(sdata);
+
+	list_for_each_entry(sdata, &local->interfaces, list)
+		if (ieee80211_sdata_running(sdata))
+			ieee80211_enable_keys(sdata);
+
+	/* Reconfigure sched scan if it was interrupted by FW restart */
+	mutex_lock(&local->mtx);
+	sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
+						lockdep_is_held(&local->mtx));
+	sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
+						lockdep_is_held(&local->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;
+		}
+	mutex_unlock(&local->mtx);
+
+	if (sched_scan_stopped)
+		cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
+
+ wake_up:
+	if (local->in_reconfig) {
+		local->in_reconfig = false;
+		barrier();
+
+		/* Restart deferred ROCs */
+		mutex_lock(&local->mtx);
+		ieee80211_start_next_roc(local);
+		mutex_unlock(&local->mtx);
+	}
+
+	if (local->monitors == local->open_count && local->monitors > 0)
+		ieee80211_add_virtual_monitor(local);
+
+	/*
+	 * 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)) {
+		mutex_lock(&local->sta_mtx);
+
+		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);
+		}
+
+		mutex_unlock(&local->sta_mtx);
+	}
+
+	ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
+					false);
+
+	/*
+	 * 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 (!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;
+}
+
+void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
+{
+	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;
+
+	if (WARN_ON(!local->resuming))
+		return;
+
+	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
+		return;
+
+	sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
+
+	mutex_lock(&local->key_mtx);
+	list_for_each_entry(key, &sdata->key_list, list)
+		key->flags |= KEY_FLAG_TAINTED;
+	mutex_unlock(&local->key_mtx);
+}
+EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
+
+void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_chanctx *chanctx;
+
+	mutex_lock(&local->chanctx_mtx);
+
+	chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					lockdep_is_held(&local->chanctx_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)
+		goto unlock;
+
+	chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
+	ieee80211_recalc_smps_chanctx(local, chanctx);
+ unlock:
+	mutex_unlock(&local->chanctx_mtx);
+}
+
+void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_chanctx *chanctx;
+
+	mutex_lock(&local->chanctx_mtx);
+
+	chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					lockdep_is_held(&local->chanctx_mtx));
+
+	if (WARN_ON_ONCE(!chanctx_conf))
+		goto unlock;
+
+	chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
+	ieee80211_recalc_chanctx_min_def(local, chanctx);
+ unlock:
+	mutex_unlock(&local->chanctx_mtx);
+}
+
+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;
+}
+
+static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
+					    int rssi_min_thold,
+					    int rssi_max_thold)
+{
+	trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
+		return;
+
+	/*
+	 * Scale up threshold values before storing it, as the RSSI averaging
+	 * algorithm uses a scaled up value as well. Change this scaling
+	 * factor if the RSSI averaging algorithm changes.
+	 */
+	sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
+	sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
+}
+
+void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
+				    int rssi_min_thold,
+				    int rssi_max_thold)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	WARN_ON(rssi_min_thold == rssi_max_thold ||
+		rssi_min_thold > rssi_max_thold);
+
+	_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
+				       rssi_max_thold);
+}
+EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
+
+void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	_ieee80211_enable_rssi_reports(sdata, 0, 0);
+}
+EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
+
+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;
+}
+
+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;
+	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);
+}
+
+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_seg1_idx = ieee80211_frequency_to_channel(
+							chandef->center_freq1);
+	if (chandef->center_freq2)
+		vht_oper->center_freq_seg2_idx =
+			ieee80211_frequency_to_channel(chandef->center_freq2);
+	else
+		vht_oper->center_freq_seg2_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_seg2_idx = vht_oper->center_freq_seg1_idx;
+		if (chandef->chan->center_freq < chandef->center_freq1)
+			vht_oper->center_freq_seg1_idx -= 8;
+		else
+			vht_oper->center_freq_seg1_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;
+	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);
+}
+
+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:
+		channel_type = NL80211_CHAN_NO_HT;
+		return false;
+	}
+
+	cfg80211_chandef_create(chandef, chandef->chan, channel_type);
+	return true;
+}
+
+bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
+				struct cfg80211_chan_def *chandef)
+{
+	struct cfg80211_chan_def new = *chandef;
+	int cf1, cf2;
+
+	if (!oper)
+		return false;
+
+	cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
+					     chandef->chan->band);
+	cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
+					     chandef->chan->band);
+
+	switch (oper->chan_width) {
+	case IEEE80211_VHT_CHANWIDTH_USE_HT:
+		break;
+	case IEEE80211_VHT_CHANWIDTH_80MHZ:
+		new.width = NL80211_CHAN_WIDTH_80;
+		new.center_freq1 = cf1;
+		/* If needed, adjust based on the newer interop workaround. */
+		if (oper->center_freq_seg2_idx) {
+			unsigned int diff;
+
+			diff = abs(oper->center_freq_seg2_idx -
+				   oper->center_freq_seg1_idx);
+			if (diff == 8) {
+				new.width = NL80211_CHAN_WIDTH_160;
+				new.center_freq1 = cf2;
+			} else if (diff > 8) {
+				new.width = NL80211_CHAN_WIDTH_80P80;
+				new.center_freq2 = cf2;
+			}
+		}
+		break;
+	case IEEE80211_VHT_CHANWIDTH_160MHZ:
+		new.width = NL80211_CHAN_WIDTH_160;
+		new.center_freq1 = cf1;
+		break;
+	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+		new.width = NL80211_CHAN_WIDTH_80P80;
+		new.center_freq1 = cf1;
+		new.center_freq2 = cf2;
+		break;
+	default:
+		return false;
+	}
+
+	if (!cfg80211_chandef_valid(&new))
+		return false;
+
+	*chandef = new;
+	return true;
+}
+
+int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
+			     const struct ieee80211_supported_band *sband,
+			     const u8 *srates, int srates_len, u32 *rates)
+{
+	u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
+	int shift = ieee80211_chandef_get_shift(chandef);
+	struct ieee80211_rate *br;
+	int brate, rate, i, j, count = 0;
+
+	*rates = 0;
+
+	for (i = 0; i < srates_len; i++) {
+		rate = srates[i] & 0x7f;
+
+		for (j = 0; j < sband->n_bitrates; j++) {
+			br = &sband->bitrates[j];
+			if ((rate_flags & br->flags) != rate_flags)
+				continue;
+
+			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
+			if (brate == rate) {
+				*rates |= BIT(j);
+				count++;
+				break;
+			}
+		}
+	}
+	return count;
+}
+
+int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
+			    struct sk_buff *skb, bool need_basic,
+			    enum nl80211_band band)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_supported_band *sband;
+	int rate, shift;
+	u8 i, rates, *pos;
+	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
+	u32 rate_flags;
+
+	shift = ieee80211_vif_get_shift(&sdata->vif);
+	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
+	sband = local->hw.wiphy->bands[band];
+	rates = 0;
+	for (i = 0; i < sband->n_bitrates; i++) {
+		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+			continue;
+		rates++;
+	}
+	if (rates > 8)
+		rates = 8;
+
+	if (skb_tailroom(skb) < rates + 2)
+		return -ENOMEM;
+
+	pos = skb_put(skb, rates + 2);
+	*pos++ = WLAN_EID_SUPP_RATES;
+	*pos++ = rates;
+	for (i = 0; i < rates; i++) {
+		u8 basic = 0;
+		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+			continue;
+
+		if (need_basic && basic_rates & BIT(i))
+			basic = 0x80;
+		rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
+				    5 * (1 << shift));
+		*pos++ = basic | (u8) rate;
+	}
+
+	return 0;
+}
+
+int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
+				struct sk_buff *skb, bool need_basic,
+				enum nl80211_band band)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_supported_band *sband;
+	int rate, shift;
+	u8 i, exrates, *pos;
+	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
+	u32 rate_flags;
+
+	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
+	shift = ieee80211_vif_get_shift(&sdata->vif);
+
+	sband = local->hw.wiphy->bands[band];
+	exrates = 0;
+	for (i = 0; i < sband->n_bitrates; i++) {
+		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+			continue;
+		exrates++;
+	}
+
+	if (exrates > 8)
+		exrates -= 8;
+	else
+		exrates = 0;
+
+	if (skb_tailroom(skb) < exrates + 2)
+		return -ENOMEM;
+
+	if (exrates) {
+		pos = skb_put(skb, exrates + 2);
+		*pos++ = WLAN_EID_EXT_SUPP_RATES;
+		*pos++ = exrates;
+		for (i = 8; i < sband->n_bitrates; i++) {
+			u8 basic = 0;
+			if ((rate_flags & sband->bitrates[i].flags)
+			    != rate_flags)
+				continue;
+			if (need_basic && basic_rates & BIT(i))
+				basic = 0x80;
+			rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
+					    5 * (1 << shift));
+			*pos++ = basic | (u8) rate;
+		}
+	}
+	return 0;
+}
+
+int ieee80211_ave_rssi(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
+		/* non-managed type inferfaces */
+		return 0;
+	}
+	return -ewma_beacon_signal_read(&ifmgd->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.
+ */
+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;
+	struct rate_info ri;
+	u16 rate;
+
+	if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
+		return 0;
+
+	memset(&ri, 0, sizeof(ri));
+
+	/* Fill cfg80211 rate info */
+	if (status->flag & RX_FLAG_HT) {
+		ri.mcs = status->rate_idx;
+		ri.flags |= RATE_INFO_FLAGS_MCS;
+		if (status->flag & RX_FLAG_40MHZ)
+			ri.bw = RATE_INFO_BW_40;
+		else
+			ri.bw = RATE_INFO_BW_20;
+		if (status->flag & RX_FLAG_SHORT_GI)
+			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
+	} else if (status->flag & RX_FLAG_VHT) {
+		ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
+		ri.mcs = status->rate_idx;
+		ri.nss = status->vht_nss;
+		if (status->flag & RX_FLAG_40MHZ)
+			ri.bw = RATE_INFO_BW_40;
+		else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
+			ri.bw = RATE_INFO_BW_80;
+		else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
+			ri.bw = RATE_INFO_BW_160;
+		else
+			ri.bw = RATE_INFO_BW_20;
+		if (status->flag & RX_FLAG_SHORT_GI)
+			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
+	} else {
+		struct ieee80211_supported_band *sband;
+		int shift = 0;
+		int bitrate;
+
+		if (status->flag & RX_FLAG_10MHZ) {
+			shift = 1;
+			ri.bw = RATE_INFO_BW_10;
+		} else if (status->flag & RX_FLAG_5MHZ) {
+			shift = 2;
+			ri.bw = RATE_INFO_BW_5;
+		} else {
+			ri.bw = RATE_INFO_BW_20;
+		}
+
+		sband = local->hw.wiphy->bands[status->band];
+		bitrate = sband->bitrates[status->rate_idx].bitrate;
+		ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
+
+		if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
+			/* TODO: handle HT/VHT preambles */
+			if (status->band == NL80211_BAND_5GHZ) {
+				ts += 20 << shift;
+				mpdu_offset += 2;
+			} else if (status->flag & RX_FLAG_SHORTPRE) {
+				ts += 96;
+			} else {
+				ts += 192;
+			}
+		}
+	}
+
+	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->vht_nss))
+		return 0;
+
+	/* rewind from end of MPDU */
+	if (status->flag & RX_FLAG_MACTIME_END)
+		ts -= mpdu_len * 8 * 10 / rate;
+
+	ts += mpdu_offset * 8 * 10 / rate;
+
+	return ts;
+}
+
+void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct cfg80211_chan_def chandef;
+
+	mutex_lock(&local->mtx);
+	mutex_lock(&local->iflist_mtx);
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		/* it might be waiting for the local->mtx, but then
+		 * by the time it gets it, sdata->wdev.cac_started
+		 * will no longer be true
+		 */
+		cancel_delayed_work(&sdata->dfs_cac_timer_work);
+
+		if (sdata->wdev.cac_started) {
+			chandef = sdata->vif.bss_conf.chandef;
+			ieee80211_vif_release_channel(sdata);
+			cfg80211_cac_event(sdata->dev,
+					   &chandef,
+					   NL80211_RADAR_CAC_ABORTED,
+					   GFP_KERNEL);
+		}
+	}
+	mutex_unlock(&local->iflist_mtx);
+	mutex_unlock(&local->mtx);
+}
+
+void ieee80211_dfs_radar_detected_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local, radar_detected_work);
+	struct cfg80211_chan_def chandef = local->hw.conf.chandef;
+	struct ieee80211_chanctx *ctx;
+	int num_chanctx = 0;
+
+	mutex_lock(&local->chanctx_mtx);
+	list_for_each_entry(ctx, &local->chanctx_list, list) {
+		if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
+			continue;
+
+		num_chanctx++;
+		chandef = ctx->conf.def;
+	}
+	mutex_unlock(&local->chanctx_mtx);
+
+	ieee80211_dfs_cac_cancel(local);
+
+	if (num_chanctx > 1)
+		/* XXX: multi-channel is not supported yet */
+		WARN_ON(1);
+	else
+		cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
+}
+
+void ieee80211_radar_detected(struct ieee80211_hw *hw)
+{
+	struct ieee80211_local *local = hw_to_local(hw);
+
+	trace_api_radar_detected(local);
+
+	ieee80211_queue_work(hw, &local->radar_detected_work);
+}
+EXPORT_SYMBOL(ieee80211_radar_detected);
+
+u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
+{
+	u32 ret;
+	int tmp;
+
+	switch (c->width) {
+	case NL80211_CHAN_WIDTH_20:
+		c->width = NL80211_CHAN_WIDTH_20_NOHT;
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+		c->width = NL80211_CHAN_WIDTH_20;
+		c->center_freq1 = c->chan->center_freq;
+		ret = IEEE80211_STA_DISABLE_40MHZ |
+		      IEEE80211_STA_DISABLE_VHT;
+		break;
+	case NL80211_CHAN_WIDTH_80:
+		tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
+		/* n_P40 */
+		tmp /= 2;
+		/* freq_P40 */
+		c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
+		c->width = NL80211_CHAN_WIDTH_40;
+		ret = IEEE80211_STA_DISABLE_VHT;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+		c->center_freq2 = 0;
+		c->width = NL80211_CHAN_WIDTH_80;
+		ret = IEEE80211_STA_DISABLE_80P80MHZ |
+		      IEEE80211_STA_DISABLE_160MHZ;
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		/* n_P20 */
+		tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
+		/* n_P80 */
+		tmp /= 4;
+		c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
+		c->width = NL80211_CHAN_WIDTH_80;
+		ret = IEEE80211_STA_DISABLE_80P80MHZ |
+		      IEEE80211_STA_DISABLE_160MHZ;
+		break;
+	default:
+	case NL80211_CHAN_WIDTH_20_NOHT:
+		WARN_ON_ONCE(1);
+		c->width = NL80211_CHAN_WIDTH_20_NOHT;
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		break;
+	case NL80211_CHAN_WIDTH_5:
+	case NL80211_CHAN_WIDTH_10:
+		WARN_ON_ONCE(1);
+		/* keep c->width */
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		break;
+	}
+
+	WARN_ON_ONCE(!cfg80211_chandef_valid(c));
+
+	return ret;
+}
+
+/*
+ * Returns true if smps_mode_new is strictly more restrictive than
+ * smps_mode_old.
+ */
+bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
+				   enum ieee80211_smps_mode smps_mode_new)
+{
+	if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
+			 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
+		return false;
+
+	switch (smps_mode_old) {
+	case IEEE80211_SMPS_STATIC:
+		return false;
+	case IEEE80211_SMPS_DYNAMIC:
+		return smps_mode_new == IEEE80211_SMPS_STATIC;
+	case IEEE80211_SMPS_OFF:
+		return smps_mode_new != IEEE80211_SMPS_OFF;
+	default:
+		WARN_ON(1);
+	}
+
+	return false;
+}
+
+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 = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
+			       sizeof(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 */
+			    8); /* mesh channel switch parameters element */
+	if (!skb)
+		return -ENOMEM;
+
+	skb_reserve(skb, local->tx_headroom);
+	mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
+	memset(mgmt, 0, 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;
+	}
+
+	ieee80211_tx_skb(sdata, skb);
+	return 0;
+}
+
+bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
+{
+	return !(cs == NULL || cs->cipher == 0 ||
+		 cs->hdr_len < cs->pn_len + cs->pn_off ||
+		 cs->hdr_len <= cs->key_idx_off ||
+		 cs->key_idx_shift > 7 ||
+		 cs->key_idx_mask == 0);
+}
+
+bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
+{
+	int i;
+
+	/* Ensure we have enough iftype bitmap space for all iftype values */
+	WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
+
+	for (i = 0; i < n; i++)
+		if (!ieee80211_cs_valid(&cs[i]))
+			return false;
+
+	return true;
+}
+
+const struct ieee80211_cipher_scheme *
+ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
+		 enum nl80211_iftype iftype)
+{
+	const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
+	int n = local->hw.n_cipher_schemes;
+	int i;
+	const struct ieee80211_cipher_scheme *cs = NULL;
+
+	for (i = 0; i < n; i++) {
+		if (l[i].cipher == cipher) {
+			cs = &l[i];
+			break;
+		}
+	}
+
+	if (!cs || !(cs->iftype & BIT(iftype)))
+		return NULL;
+
+	return cs;
+}
+
+int ieee80211_cs_headroom(struct ieee80211_local *local,
+			  struct cfg80211_crypto_settings *crypto,
+			  enum nl80211_iftype iftype)
+{
+	const struct ieee80211_cipher_scheme *cs;
+	int headroom = IEEE80211_ENCRYPT_HEADROOM;
+	int i;
+
+	for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
+		cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
+				      iftype);
+
+		if (cs && headroom < cs->hdr_len)
+			headroom = cs->hdr_len;
+	}
+
+	cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
+	if (cs && headroom < cs->hdr_len)
+		headroom = cs->hdr_len;
+
+	return headroom;
+}
+
+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_local *local,
+			   struct ieee80211_sub_if_data *sdata)
+{
+	u64 tsf = drv_get_tsf(local, sdata);
+	u64 dtim_count = 0;
+	u16 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;
+}
+
+static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
+					 struct ieee80211_chanctx *ctx)
+{
+	struct ieee80211_sub_if_data *sdata;
+	u8 radar_detect = 0;
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
+		return 0;
+
+	list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
+		if (sdata->reserved_radar_required)
+			radar_detect |= BIT(sdata->reserved_chandef.width);
+
+	/*
+	 * An in-place reservation context should not have any assigned vifs
+	 * until it replaces the other context.
+	 */
+	WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
+		!list_empty(&ctx->assigned_vifs));
+
+	list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
+		if (sdata->radar_required)
+			radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
+
+	return radar_detect;
+}
+
+int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
+				 const struct cfg80211_chan_def *chandef,
+				 enum ieee80211_chanctx_mode chanmode,
+				 u8 radar_detect)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_sub_if_data *sdata_iter;
+	enum nl80211_iftype iftype = sdata->wdev.iftype;
+	struct ieee80211_chanctx *ctx;
+	int total = 1;
+	struct iface_combination_params params = {
+		.radar_detect = radar_detect,
+	};
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	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 (local->hw.wiphy->software_iftypes & BIT(iftype)) {
+		if (radar_detect)
+			return -EINVAL;
+		return 0;
+	}
+
+	if (chandef)
+		params.num_different_channels = 1;
+
+	if (iftype != NL80211_IFTYPE_UNSPECIFIED)
+		params.iftype_num[iftype] = 1;
+
+	list_for_each_entry(ctx, &local->chanctx_list, list) {
+		if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
+			continue;
+		params.radar_detect |=
+			ieee80211_chanctx_radar_detect(local, ctx);
+		if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
+			params.num_different_channels++;
+			continue;
+		}
+		if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
+		    cfg80211_chandef_compatible(chandef,
+						&ctx->conf.def))
+			continue;
+		params.num_different_channels++;
+	}
+
+	list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
+		struct wireless_dev *wdev_iter;
+
+		wdev_iter = &sdata_iter->wdev;
+
+		if (sdata_iter == sdata ||
+		    !ieee80211_sdata_running(sdata_iter) ||
+		    local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
+			continue;
+
+		params.iftype_num[wdev_iter->iftype]++;
+		total++;
+	}
+
+	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)
+{
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_chanctx *ctx;
+	u32 max_num_different_channels = 1;
+	int err;
+	struct iface_combination_params params = {0};
+
+	lockdep_assert_held(&local->chanctx_mtx);
+
+	list_for_each_entry(ctx, &local->chanctx_list, list) {
+		if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
+			continue;
+
+		params.num_different_channels++;
+
+		params.radar_detect |=
+			ieee80211_chanctx_radar_detect(local, ctx);
+	}
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list)
+		params.iftype_num[sdata->wdev.iftype]++;
+
+	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;
+}
+
+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
+};