selftests/bpf: Add a test for objects stuck in free_by_rcu_ttracegrafted

Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first
free_bulk() starts RCU tasks trace GP and the rest of the elements are
freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear
in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and
waiting_for_gp_ttrace lists are empty.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

1 files changed, 1879 insertions, 0 deletions

diff --git a/net/wireless/chan.c b/net/wireless/chan.c
new file mode 100644
index 000000000..7f6af1790
--- /dev/null
+++ b/net/wireless/chan.c
@@ -0,0 +1,1879 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This file contains helper code to handle channel
+ * settings and keeping track of what is possible at
+ * any point in time.
+ *
+ * Copyright 2009	Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2013-2014  Intel Mobile Communications GmbH
+ * Copyright 2018-2026	Intel Corporation
+ */
+
+#include <linux/export.h>
+#include <linux/bitfield.h>
+#include <net/cfg80211.h>
+#include "core.h"
+#include "rdev-ops.h"
+
+static bool cfg80211_valid_60g_freq(u32 freq)
+{
+	return freq >= 58320 && freq <= 70200;
+}
+
+void cfg80211_chandef_create(struct cfg80211_chan_def *chandef,
+			     struct ieee80211_channel *chan,
+			     enum nl80211_channel_type chan_type)
+{
+	if (WARN_ON(!chan))
+		return;
+
+	*chandef = (struct cfg80211_chan_def) {
+		.chan = chan,
+	};
+
+	WARN_ON(chan->band == NL80211_BAND_60GHZ ||
+		chan->band == NL80211_BAND_S1GHZ);
+
+	switch (chan_type) {
+	case NL80211_CHAN_NO_HT:
+		chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
+		chandef->center_freq1 = chan->center_freq;
+		break;
+	case NL80211_CHAN_HT20:
+		chandef->width = NL80211_CHAN_WIDTH_20;
+		chandef->center_freq1 = chan->center_freq;
+		break;
+	case NL80211_CHAN_HT40PLUS:
+		chandef->width = NL80211_CHAN_WIDTH_40;
+		chandef->center_freq1 = chan->center_freq + 10;
+		break;
+	case NL80211_CHAN_HT40MINUS:
+		chandef->width = NL80211_CHAN_WIDTH_40;
+		chandef->center_freq1 = chan->center_freq - 10;
+		break;
+	default:
+		WARN_ON(1);
+	}
+}
+EXPORT_SYMBOL(cfg80211_chandef_create);
+
+static u32 cfg80211_get_start_freq(const struct cfg80211_chan_def *chandef,
+				   u32 cf)
+{
+	u32 start_freq, center_freq, bandwidth;
+
+	center_freq = MHZ_TO_KHZ((cf == 1) ?
+			chandef->center_freq1 : chandef->center_freq2);
+	bandwidth = MHZ_TO_KHZ(cfg80211_chandef_get_width(chandef));
+
+	if (bandwidth <= MHZ_TO_KHZ(20))
+		start_freq = center_freq;
+	else
+		start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10);
+
+	return start_freq;
+}
+
+static u32 cfg80211_get_end_freq(const struct cfg80211_chan_def *chandef,
+				 u32 cf)
+{
+	u32 end_freq, center_freq, bandwidth;
+
+	center_freq = MHZ_TO_KHZ((cf == 1) ?
+			chandef->center_freq1 : chandef->center_freq2);
+	bandwidth = MHZ_TO_KHZ(cfg80211_chandef_get_width(chandef));
+
+	if (bandwidth <= MHZ_TO_KHZ(20))
+		end_freq = center_freq;
+	else
+		end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10);
+
+	return end_freq;
+}
+
+#define for_each_subchan(chandef, freq, cf)				\
+	for (u32 punctured = chandef->punctured,			\
+	     cf = 1, freq = cfg80211_get_start_freq(chandef, cf);	\
+	     freq <= cfg80211_get_end_freq(chandef, cf);		\
+	     freq += MHZ_TO_KHZ(20),					\
+	     ((cf == 1 && chandef->center_freq2 != 0 &&			\
+	       freq > cfg80211_get_end_freq(chandef, cf)) ?		\
+	      (cf++, freq = cfg80211_get_start_freq(chandef, cf),	\
+	       punctured = 0) : (punctured >>= 1)))			\
+		if (!(punctured & 1))
+
+#define for_each_s1g_subchan(chandef, freq_khz)                   \
+	for (freq_khz = cfg80211_s1g_get_start_freq_khz(chandef); \
+	     freq_khz <= cfg80211_s1g_get_end_freq_khz(chandef);  \
+	     freq_khz += MHZ_TO_KHZ(1))
+
+struct cfg80211_per_bw_puncturing_values {
+	u8 len;
+	const u16 *valid_values;
+};
+
+static const u16 puncturing_values_80mhz[] = {
+	0x8, 0x4, 0x2, 0x1
+};
+
+static const u16 puncturing_values_160mhz[] = {
+	 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1, 0xc0, 0x30, 0xc, 0x3
+};
+
+static const u16 puncturing_values_320mhz[] = {
+	0xc000, 0x3000, 0xc00, 0x300, 0xc0, 0x30, 0xc, 0x3, 0xf000, 0xf00,
+	0xf0, 0xf, 0xfc00, 0xf300, 0xf0c0, 0xf030, 0xf00c, 0xf003, 0xc00f,
+	0x300f, 0xc0f, 0x30f, 0xcf, 0x3f
+};
+
+#define CFG80211_PER_BW_VALID_PUNCTURING_VALUES(_bw) \
+	{ \
+		.len = ARRAY_SIZE(puncturing_values_ ## _bw ## mhz), \
+		.valid_values = puncturing_values_ ## _bw ## mhz \
+	}
+
+static const struct cfg80211_per_bw_puncturing_values per_bw_puncturing[] = {
+	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(80),
+	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(160),
+	CFG80211_PER_BW_VALID_PUNCTURING_VALUES(320)
+};
+
+static bool valid_puncturing_bitmap(const struct cfg80211_chan_def *chandef,
+				    u32 primary_center, u32 punctured)
+{
+	u32 idx, i, start_freq;
+
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_80:
+		idx = 0;
+		start_freq = chandef->center_freq1 - 40;
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		idx = 1;
+		start_freq = chandef->center_freq1 - 80;
+		break;
+	case NL80211_CHAN_WIDTH_320:
+		idx = 2;
+		start_freq = chandef->center_freq1 - 160;
+		break;
+	default:
+		return punctured == 0;
+	}
+
+	if (!punctured)
+		return true;
+
+	/* check if primary channel is punctured */
+	if (punctured & (u16)BIT((primary_center - start_freq) / 20))
+		return false;
+
+	for (i = 0; i < per_bw_puncturing[idx].len; i++) {
+		if (per_bw_puncturing[idx].valid_values[i] == punctured)
+			return true;
+	}
+
+	return false;
+}
+
+static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef)
+{
+	int max_contiguous = 0;
+	int num_of_enabled = 0;
+	int contiguous = 0;
+	int i;
+
+	if (!chandef->edmg.channels || !chandef->edmg.bw_config)
+		return false;
+
+	if (!cfg80211_valid_60g_freq(chandef->chan->center_freq))
+		return false;
+
+	for (i = 0; i < 6; i++) {
+		if (chandef->edmg.channels & BIT(i)) {
+			contiguous++;
+			num_of_enabled++;
+		} else {
+			contiguous = 0;
+		}
+
+		max_contiguous = max(contiguous, max_contiguous);
+	}
+	/* basic verification of edmg configuration according to
+	 * IEEE P802.11ay/D4.0 section 9.4.2.251
+	 */
+	/* check bw_config against contiguous edmg channels */
+	switch (chandef->edmg.bw_config) {
+	case IEEE80211_EDMG_BW_CONFIG_4:
+	case IEEE80211_EDMG_BW_CONFIG_8:
+	case IEEE80211_EDMG_BW_CONFIG_12:
+		if (max_contiguous < 1)
+			return false;
+		break;
+	case IEEE80211_EDMG_BW_CONFIG_5:
+	case IEEE80211_EDMG_BW_CONFIG_9:
+	case IEEE80211_EDMG_BW_CONFIG_13:
+		if (max_contiguous < 2)
+			return false;
+		break;
+	case IEEE80211_EDMG_BW_CONFIG_6:
+	case IEEE80211_EDMG_BW_CONFIG_10:
+	case IEEE80211_EDMG_BW_CONFIG_14:
+		if (max_contiguous < 3)
+			return false;
+		break;
+	case IEEE80211_EDMG_BW_CONFIG_7:
+	case IEEE80211_EDMG_BW_CONFIG_11:
+	case IEEE80211_EDMG_BW_CONFIG_15:
+		if (max_contiguous < 4)
+			return false;
+		break;
+
+	default:
+		return false;
+	}
+
+	/* check bw_config against aggregated (non contiguous) edmg channels */
+	switch (chandef->edmg.bw_config) {
+	case IEEE80211_EDMG_BW_CONFIG_4:
+	case IEEE80211_EDMG_BW_CONFIG_5:
+	case IEEE80211_EDMG_BW_CONFIG_6:
+	case IEEE80211_EDMG_BW_CONFIG_7:
+		break;
+	case IEEE80211_EDMG_BW_CONFIG_8:
+	case IEEE80211_EDMG_BW_CONFIG_9:
+	case IEEE80211_EDMG_BW_CONFIG_10:
+	case IEEE80211_EDMG_BW_CONFIG_11:
+		if (num_of_enabled < 2)
+			return false;
+		break;
+	case IEEE80211_EDMG_BW_CONFIG_12:
+	case IEEE80211_EDMG_BW_CONFIG_13:
+	case IEEE80211_EDMG_BW_CONFIG_14:
+	case IEEE80211_EDMG_BW_CONFIG_15:
+		if (num_of_enabled < 4 || max_contiguous < 2)
+			return false;
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width)
+{
+	int mhz;
+
+	switch (chan_width) {
+	case NL80211_CHAN_WIDTH_1:
+		mhz = 1;
+		break;
+	case NL80211_CHAN_WIDTH_2:
+		mhz = 2;
+		break;
+	case NL80211_CHAN_WIDTH_4:
+		mhz = 4;
+		break;
+	case NL80211_CHAN_WIDTH_8:
+		mhz = 8;
+		break;
+	case NL80211_CHAN_WIDTH_16:
+		mhz = 16;
+		break;
+	case NL80211_CHAN_WIDTH_20:
+	case NL80211_CHAN_WIDTH_20_NOHT:
+		mhz = 20;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+		mhz = 40;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+	case NL80211_CHAN_WIDTH_80:
+		mhz = 80;
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		mhz = 160;
+		break;
+	case NL80211_CHAN_WIDTH_320:
+		mhz = 320;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return -1;
+	}
+	return mhz;
+}
+EXPORT_SYMBOL(nl80211_chan_width_to_mhz);
+
+static bool cfg80211_valid_center_freq(u32 center,
+				       enum nl80211_chan_width width)
+{
+	int bw;
+	int step;
+
+	/* We only do strict verification on 6 GHz */
+	if (center < 5955 || center > 7215)
+		return true;
+
+	bw = nl80211_chan_width_to_mhz(width);
+	if (bw < 0)
+		return false;
+
+	/* Validate that the channels bw is entirely within the 6 GHz band */
+	if (center - bw / 2 < 5945 || center + bw / 2 > 7225)
+		return false;
+
+	/* With 320 MHz the permitted channels overlap */
+	if (bw == 320)
+		step = 160;
+	else
+		step = bw;
+
+	/*
+	 * Valid channels are packed from lowest frequency towards higher ones.
+	 * So test that the lower frequency aligns with one of these steps.
+	 */
+	return (center - bw / 2 - 5945) % step == 0;
+}
+
+static bool
+cfg80211_chandef_valid_control_freq(const struct cfg80211_chan_def *chandef,
+				    u32 control_freq)
+{
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_20:
+	case NL80211_CHAN_WIDTH_20_NOHT:
+	case NL80211_CHAN_WIDTH_1:
+	case NL80211_CHAN_WIDTH_2:
+	case NL80211_CHAN_WIDTH_4:
+	case NL80211_CHAN_WIDTH_8:
+	case NL80211_CHAN_WIDTH_16:
+		/* checked separately */
+		break;
+	case NL80211_CHAN_WIDTH_320:
+		if (chandef->center_freq1 == control_freq + 150 ||
+		    chandef->center_freq1 == control_freq + 130 ||
+		    chandef->center_freq1 == control_freq + 110 ||
+		    chandef->center_freq1 == control_freq + 90 ||
+		    chandef->center_freq1 == control_freq - 90 ||
+		    chandef->center_freq1 == control_freq - 110 ||
+		    chandef->center_freq1 == control_freq - 130 ||
+		    chandef->center_freq1 == control_freq - 150)
+			break;
+		fallthrough;
+	case NL80211_CHAN_WIDTH_160:
+		if (chandef->center_freq1 == control_freq + 70 ||
+		    chandef->center_freq1 == control_freq + 50 ||
+		    chandef->center_freq1 == control_freq - 50 ||
+		    chandef->center_freq1 == control_freq - 70)
+			break;
+		fallthrough;
+	case NL80211_CHAN_WIDTH_80P80:
+	case NL80211_CHAN_WIDTH_80:
+		if (chandef->center_freq1 == control_freq + 30 ||
+		    chandef->center_freq1 == control_freq - 30)
+			break;
+		fallthrough;
+	case NL80211_CHAN_WIDTH_40:
+		if (chandef->center_freq1 == control_freq + 10 ||
+		    chandef->center_freq1 == control_freq - 10)
+			break;
+		fallthrough;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
+{
+	u32 control_freq, control_freq_khz, start_khz, end_khz;
+
+	if (!chandef->chan)
+		return false;
+
+	if (chandef->freq1_offset >= 1000)
+		return false;
+
+	control_freq = chandef->chan->center_freq;
+
+	if (cfg80211_chandef_is_s1g(chandef) &&
+	    chandef->width != NL80211_CHAN_WIDTH_1 &&
+	    chandef->width != NL80211_CHAN_WIDTH_2 &&
+	    chandef->width != NL80211_CHAN_WIDTH_4 &&
+	    chandef->width != NL80211_CHAN_WIDTH_8 &&
+	    chandef->width != NL80211_CHAN_WIDTH_16)
+		return false;
+
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_20:
+	case NL80211_CHAN_WIDTH_20_NOHT:
+		if (ieee80211_chandef_to_khz(chandef) !=
+		    ieee80211_channel_to_khz(chandef->chan))
+			return false;
+		if (chandef->center_freq2)
+			return false;
+		break;
+	case NL80211_CHAN_WIDTH_1:
+	case NL80211_CHAN_WIDTH_2:
+	case NL80211_CHAN_WIDTH_4:
+	case NL80211_CHAN_WIDTH_8:
+	case NL80211_CHAN_WIDTH_16:
+		if (!cfg80211_chandef_is_s1g(chandef))
+			return false;
+		if (chandef->center_freq2)
+			return false;
+
+		control_freq_khz = ieee80211_channel_to_khz(chandef->chan);
+		start_khz = cfg80211_s1g_get_start_freq_khz(chandef);
+		end_khz = cfg80211_s1g_get_end_freq_khz(chandef);
+
+		if (control_freq_khz < start_khz || control_freq_khz > end_khz)
+			return false;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+		if (!chandef->center_freq2)
+			return false;
+		/* adjacent is not allowed -- that's a 160 MHz channel */
+		if (chandef->center_freq1 - chandef->center_freq2 == 80 ||
+		    chandef->center_freq2 - chandef->center_freq1 == 80)
+			return false;
+		break;
+	default:
+		if (chandef->center_freq2)
+			return false;
+		break;
+	}
+
+	if (!cfg80211_chandef_valid_control_freq(chandef, control_freq))
+		return false;
+
+	if (chandef->npca_chan) {
+		switch (chandef->width) {
+		case NL80211_CHAN_WIDTH_80:
+		case NL80211_CHAN_WIDTH_160:
+		case NL80211_CHAN_WIDTH_320:
+			break;
+		default:
+			return false;
+		}
+	} else if (chandef->npca_punctured) {
+		return false;
+	}
+
+	if (!cfg80211_valid_center_freq(chandef->center_freq1, chandef->width))
+		return false;
+
+	if (chandef->width == NL80211_CHAN_WIDTH_80P80 &&
+	    !cfg80211_valid_center_freq(chandef->center_freq2, chandef->width))
+		return false;
+
+	/* channel 14 is only for IEEE 802.11b */
+	if (chandef->center_freq1 == 2484 &&
+	    chandef->width != NL80211_CHAN_WIDTH_20_NOHT)
+		return false;
+
+	if (cfg80211_chandef_is_edmg(chandef) &&
+	    !cfg80211_edmg_chandef_valid(chandef))
+		return false;
+
+	if (!cfg80211_chandef_is_s1g(chandef) && chandef->s1g_primary_2mhz)
+		return false;
+
+	return valid_puncturing_bitmap(chandef, control_freq,
+				       chandef->punctured);
+}
+EXPORT_SYMBOL(cfg80211_chandef_valid);
+
+int cfg80211_chandef_primary(const struct cfg80211_chan_def *c,
+			     enum nl80211_chan_width primary_chan_width,
+			     u16 *punctured)
+{
+	int pri_width = nl80211_chan_width_to_mhz(primary_chan_width);
+	int width = cfg80211_chandef_get_width(c);
+	u32 control = c->chan->center_freq;
+	u32 center = c->center_freq1;
+	u16 _punct = 0;
+
+	if (WARN_ON_ONCE(pri_width < 0 || width < 0))
+		return -1;
+
+	/* not intended to be called this way, can't determine */
+	if (WARN_ON_ONCE(pri_width > width))
+		return -1;
+
+	if (!punctured)
+		punctured = &_punct;
+
+	*punctured = c->punctured;
+
+	while (width > pri_width) {
+		unsigned int bits_to_drop = width / 20 / 2;
+
+		if (control > center) {
+			center += width / 4;
+			*punctured >>= bits_to_drop;
+		} else {
+			center -= width / 4;
+			*punctured &= (1 << bits_to_drop) - 1;
+		}
+		width /= 2;
+	}
+
+	return center;
+}
+EXPORT_SYMBOL(cfg80211_chandef_primary);
+
+bool cfg80211_chandef_npca_valid(struct wiphy *wiphy,
+				 const struct cfg80211_chan_def *chandef,
+				 const struct ieee80211_uhr_npca_info *npca)
+{
+	struct cfg80211_chan_def tmp = *chandef;
+	bool pri_upper, npca_upper;
+	u32 cf1;
+
+	if (chandef->npca_chan || chandef->npca_punctured)
+		return false;
+
+	if (!npca)
+		return true;
+
+	if (cfg80211_chandef_add_npca(wiphy, &tmp, npca))
+		return false;
+
+	if (!cfg80211_chandef_valid_control_freq(&tmp,
+						 tmp.npca_chan->center_freq))
+		return false;
+
+	cf1 = tmp.center_freq1;
+	pri_upper = tmp.chan->center_freq > cf1;
+	npca_upper = tmp.npca_chan->center_freq > cf1;
+
+	if (pri_upper == npca_upper)
+		return false;
+
+	if (!valid_puncturing_bitmap(&tmp,
+				     tmp.npca_chan->center_freq,
+				     tmp.npca_punctured) ||
+	    (tmp.punctured & tmp.npca_punctured) != tmp.punctured)
+		return false;
+
+	return true;
+}
+EXPORT_SYMBOL(cfg80211_chandef_npca_valid);
+
+int cfg80211_chandef_add_npca(struct wiphy *wiphy,
+			      struct cfg80211_chan_def *chandef,
+			      const struct ieee80211_uhr_npca_info *npca)
+{
+	struct cfg80211_chan_def new_chandef = *chandef;
+	u32 width, npca_freq;
+	u8 offs;
+
+	if (chandef->npca_chan || chandef->npca_punctured)
+		return -EINVAL;
+
+	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
+		return -EINVAL;
+
+	if (!npca)
+		return 0;
+
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_80:
+	case NL80211_CHAN_WIDTH_160:
+	case NL80211_CHAN_WIDTH_320:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	offs = le32_get_bits(npca->params,
+			     IEEE80211_UHR_NPCA_PARAMS_PRIMARY_CHAN_OFFS);
+
+	width = cfg80211_chandef_get_width(chandef);
+	npca_freq = chandef->center_freq1 - width / 2 + 10 + 20 * offs;
+	new_chandef.npca_chan = ieee80211_get_channel(wiphy, npca_freq);
+	if (!new_chandef.npca_chan)
+		return -EINVAL;
+
+	if (npca->params & cpu_to_le32(IEEE80211_UHR_NPCA_PARAMS_DIS_SUBCH_BMAP_PRES))
+		new_chandef.npca_punctured = le16_to_cpu(npca->dis_subch_bmap[0]);
+
+	if (!cfg80211_chandef_valid(&new_chandef))
+		return -EINVAL;
+
+	*chandef = new_chandef;
+	return 0;
+}
+EXPORT_SYMBOL(cfg80211_chandef_add_npca);
+
+int cfg80211_chandef_add_dbe(struct cfg80211_chan_def *chandef,
+			     const struct ieee80211_uhr_dbe_info *dbe)
+{
+	struct cfg80211_chan_def new_chandef = *chandef;
+	u16 starting_freq, bw_mhz, start_old, start_new;
+	u8 bw, punct_shift;
+	int offset, index;
+
+	if (!dbe)
+		return 0;
+
+	if (!cfg80211_chandef_valid(chandef))
+		return -EINVAL;
+
+	if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT)
+		return -EINVAL;
+
+	bw = u8_get_bits(dbe->params, IEEE80211_UHR_DBE_OPER_BANDWIDTH);
+
+	switch (chandef->chan->band) {
+	case NL80211_BAND_5GHZ:
+		if (bw > IEEE80211_UHR_DBE_OPER_BW_160)
+			return -EINVAL;
+		if (chandef->chan->center_freq < 5745)
+			starting_freq = 5180; /* channel 36 */
+		else
+			starting_freq = 5745; /* channel 149 */
+		break;
+	case NL80211_BAND_6GHZ:
+		starting_freq = 5955; /* channel 1 center */
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (bw) {
+	case IEEE80211_UHR_DBE_OPER_BW_320_2:
+	case IEEE80211_UHR_DBE_OPER_BW_320_1:
+		if (chandef->width == NL80211_CHAN_WIDTH_160)
+			break;
+		fallthrough;
+	case IEEE80211_UHR_DBE_OPER_BW_160:
+		if (chandef->width == NL80211_CHAN_WIDTH_80)
+			break;
+		fallthrough;
+	case IEEE80211_UHR_DBE_OPER_BW_80:
+		if (chandef->width == NL80211_CHAN_WIDTH_40)
+			break;
+		fallthrough;
+	case IEEE80211_UHR_DBE_OPER_BW_40:
+		if (chandef->width == NL80211_CHAN_WIDTH_20)
+			break;
+		fallthrough;
+	default:
+		return -EINVAL;
+	}
+
+	switch (bw) {
+	case IEEE80211_UHR_DBE_OPER_BW_320_2:
+		/* 320-2 starts shifted by 160 */
+		starting_freq += 160;
+		fallthrough;
+	case IEEE80211_UHR_DBE_OPER_BW_320_1:
+		new_chandef.width = NL80211_CHAN_WIDTH_320;
+		bw_mhz = 320;
+		break;
+	case IEEE80211_UHR_DBE_OPER_BW_160:
+		new_chandef.width = NL80211_CHAN_WIDTH_160;
+		bw_mhz = 160;
+		break;
+	case IEEE80211_UHR_DBE_OPER_BW_80:
+		new_chandef.width = NL80211_CHAN_WIDTH_80;
+		bw_mhz = 80;
+		break;
+	case IEEE80211_UHR_DBE_OPER_BW_40:
+		new_chandef.width = NL80211_CHAN_WIDTH_40;
+		bw_mhz = 40;
+		break;
+	}
+
+	/* this should only happen for 320-2 and misconfigured AP */
+	if (chandef->chan->center_freq < starting_freq)
+		return -EINVAL;
+
+	offset = chandef->chan->center_freq - starting_freq;
+	index = offset / bw_mhz;
+	start_new = starting_freq - 10 + index * bw_mhz;
+	new_chandef.center_freq1 = start_new + bw_mhz / 2;
+
+	start_old = chandef->center_freq1 -
+		    cfg80211_chandef_get_width(chandef) / 2;
+
+	/*
+	 * If the DBE channel extends downward below the lower
+	 * edge of the BSS channel, we need to shift puncturing
+	 * bitmaps up to adjust for that.
+	 */
+	if (start_new < start_old)
+		punct_shift = (start_old - start_new) / 20;
+	else
+		punct_shift = 0;
+
+	new_chandef.punctured <<= punct_shift;
+	new_chandef.npca_punctured <<= punct_shift;
+
+	if (dbe->params & IEEE80211_UHR_DBE_OPER_DIS_SUBCHANNEL_BITMAP_PRES) {
+		u16 punct_mask = ((1 << (bw_mhz / 40)) - 1) << punct_shift;
+		u16 punctured = le16_to_cpu(dbe->dis_subch_bmap[0]);
+
+		if ((punctured & punct_mask) != (new_chandef.punctured & punct_mask))
+			return -EINVAL;
+
+		new_chandef.punctured = punctured;
+	}
+
+	if (!cfg80211_chandef_valid(&new_chandef))
+		return -EINVAL;
+
+	/*
+	 * If e.g. a 40 MHz BSS channel (erroneously) occupies the center of the
+	 * DBE 80 MHz channel, they would be incompatible; check and reject.
+	 */
+	if (!cfg80211_chandef_compatible(&new_chandef, chandef))
+		return -EINVAL;
+
+	*chandef = new_chandef;
+	return 0;
+}
+EXPORT_SYMBOL(cfg80211_chandef_add_dbe);
+
+static const struct cfg80211_chan_def *
+check_chandef_primary_compat(const struct cfg80211_chan_def *c1,
+			     const struct cfg80211_chan_def *c2,
+			     enum nl80211_chan_width primary_chan_width)
+{
+	u16 punct_c1 = 0, punct_c2 = 0;
+
+	/* check primary is compatible -> error if not */
+	if (cfg80211_chandef_primary(c1, primary_chan_width, &punct_c1) !=
+	    cfg80211_chandef_primary(c2, primary_chan_width, &punct_c2))
+		return ERR_PTR(-EINVAL);
+
+	if (punct_c1 != punct_c2)
+		return ERR_PTR(-EINVAL);
+
+	/* assumes c1 is smaller width, if that was just checked -> done */
+	if (c1->width == primary_chan_width)
+		return c2;
+
+	/* otherwise continue checking the next width */
+	return NULL;
+}
+
+static const struct cfg80211_chan_def *
+_cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1,
+			     const struct cfg80211_chan_def *c2)
+{
+	const struct cfg80211_chan_def *ret;
+
+	/* If they are identical, return */
+	if (cfg80211_chandef_identical(c1, c2))
+		return c2;
+
+	/* otherwise, must have same control channel */
+	if (c1->chan != c2->chan)
+		return NULL;
+
+	/*
+	 * If they have the same width, but aren't identical,
+	 * then they can't be compatible.
+	 */
+	if (c1->width == c2->width)
+		return NULL;
+
+	/*
+	 * We need NPCA to be compatible for some scenarios such as
+	 * multiple APs, but in this case userspace should configure
+	 * identical chandefs including NPCA, even if perhaps one of
+	 * the AP interfaces doesn't even advertise it.
+	 */
+	if (c1->npca_chan || c2->npca_chan)
+		return NULL;
+
+	/*
+	 * can't be compatible if one of them is S1G
+	 * but they don't have the same width.
+	 */
+#define IS_S1G(width)	((width) == NL80211_CHAN_WIDTH_1 || \
+			 (width) == NL80211_CHAN_WIDTH_2 || \
+			 (width) == NL80211_CHAN_WIDTH_4 || \
+			 (width) == NL80211_CHAN_WIDTH_8 || \
+			 (width) == NL80211_CHAN_WIDTH_16)
+
+	if (IS_S1G(c1->width) || IS_S1G(c2->width))
+		return NULL;
+
+	/*
+	 * Make sure that c1 is always the narrower one, so that later
+	 * we either return NULL or c2 and don't have to check both
+	 * directions.
+	 */
+	if (c1->width > c2->width)
+		swap(c1, c2);
+
+	/*
+	 * No further checks needed if the "narrower" one is only 20 MHz.
+	 * Here "narrower" includes being a 20 MHz non-HT channel vs. a
+	 * 20 MHz HT (or later) one.
+	 */
+	if (c1->width <= NL80211_CHAN_WIDTH_20)
+		return c2;
+
+	ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_40);
+	if (ret)
+		return ret;
+
+	ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_80);
+	if (ret)
+		return ret;
+
+	/*
+	 * If c1 is 80+80, then c2 is 160 or higher, but that cannot
+	 * match. If c2 was also 80+80 it was already either accepted
+	 * or rejected above (identical or not, respectively.)
+	 */
+	if (c1->width == NL80211_CHAN_WIDTH_80P80)
+		return NULL;
+
+	ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_160);
+	if (ret)
+		return ret;
+
+	/*
+	 * Getting here would mean they're both wider than 160, have the
+	 * same primary 160, but are not identical - this cannot happen
+	 * since they must be 320 (no wider chandefs exist, at least yet.)
+	 */
+	WARN_ON_ONCE(1);
+
+	return NULL;
+}
+
+const struct cfg80211_chan_def *
+cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1,
+			    const struct cfg80211_chan_def *c2)
+{
+	const struct cfg80211_chan_def *ret;
+
+	ret = _cfg80211_chandef_compatible(c1, c2);
+	if (IS_ERR(ret))
+		return NULL;
+	return ret;
+}
+EXPORT_SYMBOL(cfg80211_chandef_compatible);
+
+void cfg80211_set_dfs_state(struct wiphy *wiphy,
+			    const struct cfg80211_chan_def *chandef,
+			    enum nl80211_dfs_state dfs_state)
+{
+	struct ieee80211_channel *c;
+	int width;
+
+	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
+		return;
+
+	width = cfg80211_chandef_get_width(chandef);
+	if (width < 0)
+		return;
+
+	for_each_subchan(chandef, freq, cf) {
+		c = ieee80211_get_channel_khz(wiphy, freq);
+		if (!c || !(c->flags & IEEE80211_CHAN_RADAR))
+			continue;
+
+		c->dfs_state = dfs_state;
+		c->dfs_state_entered = jiffies;
+	}
+}
+
+void cfg80211_set_cac_state(struct wiphy *wiphy,
+			    const struct cfg80211_chan_def *chandef,
+			    bool cac_ongoing)
+{
+	struct ieee80211_channel *c;
+	int width;
+	u64 cac_time;
+
+	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
+		return;
+
+	width = cfg80211_chandef_get_width(chandef);
+	if (width < 0)
+		return;
+
+	/* Get the same timestamp for all subchannels */
+	cac_time = cac_ongoing ? ktime_get_boottime_ns() : 0;
+
+	for_each_subchan(chandef, freq, cf) {
+		c = ieee80211_get_channel_khz(wiphy, freq);
+		if (!c)
+			continue;
+
+		c->cac_start_time = cac_time;
+	}
+}
+
+static bool
+cfg80211_dfs_permissive_check_wdev(struct cfg80211_registered_device *rdev,
+				   enum nl80211_iftype iftype,
+				   struct wireless_dev *wdev,
+				   struct ieee80211_channel *chan)
+{
+	unsigned int link_id;
+
+	for_each_valid_link(wdev, link_id) {
+		struct ieee80211_channel *other_chan = NULL;
+		struct cfg80211_chan_def chandef = {};
+		int ret;
+
+		/* In order to avoid daisy chaining only allow BSS STA */
+		if (wdev->iftype != NL80211_IFTYPE_STATION ||
+		    !wdev->links[link_id].client.current_bss)
+			continue;
+
+		other_chan =
+			wdev->links[link_id].client.current_bss->pub.channel;
+
+		if (!other_chan)
+			continue;
+
+		if (chan == other_chan)
+			return true;
+
+		/* continue if we can't get the channel */
+		ret = rdev_get_channel(rdev, wdev, link_id, &chandef);
+		if (ret)
+			continue;
+
+		if (cfg80211_is_sub_chan(&chandef, chan, false))
+			return true;
+	}
+
+	return false;
+}
+
+/*
+ * Check if P2P GO is allowed to operate on a DFS channel
+ */
+static bool cfg80211_dfs_permissive_chan(struct wiphy *wiphy,
+					 enum nl80211_iftype iftype,
+					 struct ieee80211_channel *chan)
+{
+	struct wireless_dev *wdev;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	lockdep_assert_held(&rdev->wiphy.mtx);
+
+	if (!wiphy_ext_feature_isset(&rdev->wiphy,
+				     NL80211_EXT_FEATURE_DFS_CONCURRENT) ||
+	    !(chan->flags & IEEE80211_CHAN_DFS_CONCURRENT))
+		return false;
+
+	/* only valid for P2P GO */
+	if (iftype != NL80211_IFTYPE_P2P_GO)
+		return false;
+
+	/*
+	 * Allow only if there's a concurrent BSS
+	 */
+	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
+		bool ret = cfg80211_dfs_permissive_check_wdev(rdev, iftype,
+							      wdev, chan);
+		if (ret)
+			return ret;
+	}
+
+	return false;
+}
+
+static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,
+					   const struct cfg80211_chan_def *chandef,
+					   enum nl80211_iftype iftype)
+{
+	struct ieee80211_channel *c;
+
+	/* DFS is not required for S1G */
+	if (cfg80211_chandef_is_s1g(chandef))
+		return 0;
+
+	for_each_subchan(chandef, freq, cf) {
+		c = ieee80211_get_channel_khz(wiphy, freq);
+		if (!c)
+			return -EINVAL;
+
+		if (c->flags & IEEE80211_CHAN_RADAR &&
+		    !cfg80211_dfs_permissive_chan(wiphy, iftype, c))
+			return 1;
+	}
+
+	return 0;
+}
+
+
+int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
+				  const struct cfg80211_chan_def *chandef,
+				  enum nl80211_iftype iftype)
+{
+	int width;
+	int ret;
+
+	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
+		return -EINVAL;
+
+	switch (iftype) {
+	case NL80211_IFTYPE_ADHOC:
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_P2P_GO:
+	case NL80211_IFTYPE_MESH_POINT:
+	case NL80211_IFTYPE_NAN:
+		width = cfg80211_chandef_get_width(chandef);
+		if (width < 0)
+			return -EINVAL;
+
+		ret = cfg80211_get_chans_dfs_required(wiphy, chandef, iftype);
+
+		return (ret > 0) ? BIT(chandef->width) : ret;
+		break;
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_OCB:
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_MONITOR:
+	case NL80211_IFTYPE_AP_VLAN:
+	case NL80211_IFTYPE_P2P_DEVICE:
+	case NL80211_IFTYPE_NAN_DATA:
+	case NL80211_IFTYPE_PD:
+		break;
+	case NL80211_IFTYPE_WDS:
+	case NL80211_IFTYPE_UNSPECIFIED:
+	case NUM_NL80211_IFTYPES:
+		WARN_ON(1);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(cfg80211_chandef_dfs_required);
+
+bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
+				 const struct cfg80211_chan_def *chandef)
+{
+	struct ieee80211_channel *c;
+	int width, count = 0;
+
+	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
+		return false;
+
+	width = cfg80211_chandef_get_width(chandef);
+	if (width < 0)
+		return false;
+
+	/*
+	 * Check entire range of channels for the bandwidth.
+	 * Check all channels are DFS channels (DFS_USABLE or
+	 * DFS_AVAILABLE). Return number of usable channels
+	 * (require CAC). Allow DFS and non-DFS channel mix.
+	 */
+	for_each_subchan(chandef, freq, cf) {
+		c = ieee80211_get_channel_khz(wiphy, freq);
+		if (!c)
+			return false;
+
+		if (c->flags & IEEE80211_CHAN_DISABLED)
+			return false;
+
+		if (c->flags & IEEE80211_CHAN_RADAR) {
+			if (c->dfs_state == NL80211_DFS_UNAVAILABLE)
+				return false;
+
+			if (c->dfs_state == NL80211_DFS_USABLE)
+				count++;
+		}
+	}
+
+	return count > 0;
+}
+EXPORT_SYMBOL(cfg80211_chandef_dfs_usable);
+
+/*
+ * Checks if center frequency of chan falls with in the bandwidth
+ * range of chandef.
+ */
+bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
+			  struct ieee80211_channel *chan,
+			  bool primary_only)
+{
+	int width;
+	u32 freq;
+
+	if (!chandef->chan)
+		return false;
+
+	if (chandef->chan->center_freq == chan->center_freq)
+		return true;
+
+	if (primary_only)
+		return false;
+
+	width = cfg80211_chandef_get_width(chandef);
+	if (width <= 20)
+		return false;
+
+	for (freq = chandef->center_freq1 - width / 2 + 10;
+	     freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) {
+		if (chan->center_freq == freq)
+			return true;
+	}
+
+	if (!chandef->center_freq2)
+		return false;
+
+	for (freq = chandef->center_freq2 - width / 2 + 10;
+	     freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) {
+		if (chan->center_freq == freq)
+			return true;
+	}
+
+	return false;
+}
+
+bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev)
+{
+	unsigned int link;
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	switch (wdev->iftype) {
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_P2P_GO:
+		for_each_valid_link(wdev, link) {
+			if (wdev->links[link].ap.beacon_interval)
+				return true;
+		}
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		if (wdev->u.ibss.ssid_len)
+			return true;
+		break;
+	case NL80211_IFTYPE_MESH_POINT:
+		if (wdev->u.mesh.id_len)
+			return true;
+		break;
+	case NL80211_IFTYPE_STATION:
+	case NL80211_IFTYPE_OCB:
+	case NL80211_IFTYPE_P2P_CLIENT:
+	case NL80211_IFTYPE_MONITOR:
+	case NL80211_IFTYPE_AP_VLAN:
+	case NL80211_IFTYPE_P2P_DEVICE:
+	/* Can NAN type be considered as beaconing interface? */
+	case NL80211_IFTYPE_NAN:
+	case NL80211_IFTYPE_NAN_DATA:
+	case NL80211_IFTYPE_PD:
+		break;
+	case NL80211_IFTYPE_UNSPECIFIED:
+	case NL80211_IFTYPE_WDS:
+	case NUM_NL80211_IFTYPES:
+		WARN_ON(1);
+	}
+
+	return false;
+}
+
+bool cfg80211_wdev_on_sub_chan(struct wireless_dev *wdev,
+			       struct ieee80211_channel *chan,
+			       bool primary_only)
+{
+	unsigned int link;
+
+	switch (wdev->iftype) {
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_P2P_GO:
+		for_each_valid_link(wdev, link) {
+			if (cfg80211_is_sub_chan(&wdev->links[link].ap.chandef,
+						 chan, primary_only))
+				return true;
+		}
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		return cfg80211_is_sub_chan(&wdev->u.ibss.chandef, chan,
+					    primary_only);
+	case NL80211_IFTYPE_MESH_POINT:
+		return cfg80211_is_sub_chan(&wdev->u.mesh.chandef, chan,
+					    primary_only);
+	default:
+		break;
+	}
+
+	return false;
+}
+
+static bool cfg80211_is_wiphy_oper_chan(struct wiphy *wiphy,
+					struct ieee80211_channel *chan)
+{
+	struct wireless_dev *wdev;
+
+	lockdep_assert_wiphy(wiphy);
+
+	list_for_each_entry(wdev, &wiphy->wdev_list, list) {
+		if (!cfg80211_beaconing_iface_active(wdev))
+			continue;
+
+		if (cfg80211_wdev_on_sub_chan(wdev, chan, false))
+			return true;
+	}
+
+	return false;
+}
+
+static bool
+cfg80211_offchan_chain_is_active(struct cfg80211_registered_device *rdev,
+				 struct ieee80211_channel *channel)
+{
+	if (!rdev->background_radar_wdev)
+		return false;
+
+	if (!cfg80211_chandef_valid(&rdev->background_radar_chandef))
+		return false;
+
+	return cfg80211_is_sub_chan(&rdev->background_radar_chandef, channel,
+				    false);
+}
+
+bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
+				  struct ieee80211_channel *chan)
+{
+	struct cfg80211_registered_device *rdev;
+
+	ASSERT_RTNL();
+
+	if (!(chan->flags & IEEE80211_CHAN_RADAR))
+		return false;
+
+	for_each_rdev(rdev) {
+		bool found;
+
+		if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
+			continue;
+
+		guard(wiphy)(&rdev->wiphy);
+
+		found = cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan) ||
+			cfg80211_offchan_chain_is_active(rdev, chan);
+
+		if (found)
+			return true;
+	}
+
+	return false;
+}
+
+static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy,
+				const struct cfg80211_chan_def *chandef)
+{
+	struct ieee80211_channel *c;
+	int width;
+	bool dfs_offload;
+
+	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
+		return false;
+
+	width = cfg80211_chandef_get_width(chandef);
+	if (width < 0)
+		return false;
+
+	dfs_offload = wiphy_ext_feature_isset(wiphy,
+					      NL80211_EXT_FEATURE_DFS_OFFLOAD);
+
+	/*
+	 * Check entire range of channels for the bandwidth.
+	 * If any channel in between is disabled or has not
+	 * had gone through CAC return false
+	 */
+	for_each_subchan(chandef, freq, cf) {
+		c = ieee80211_get_channel_khz(wiphy, freq);
+		if (!c)
+			return false;
+
+		if (c->flags & IEEE80211_CHAN_DISABLED)
+			return false;
+
+		if ((c->flags & IEEE80211_CHAN_RADAR) &&
+		    (c->dfs_state != NL80211_DFS_AVAILABLE) &&
+		    !(c->dfs_state == NL80211_DFS_USABLE && dfs_offload))
+			return false;
+	}
+
+	return true;
+}
+
+unsigned int
+cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
+			      const struct cfg80211_chan_def *chandef)
+{
+	struct ieee80211_channel *c;
+	int width;
+	unsigned int t1 = 0, t2 = 0;
+
+	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
+		return 0;
+
+	width = cfg80211_chandef_get_width(chandef);
+	if (width < 0)
+		return 0;
+
+	for_each_subchan(chandef, freq, cf) {
+		c = ieee80211_get_channel_khz(wiphy, freq);
+		if (!c || (c->flags & IEEE80211_CHAN_DISABLED)) {
+			if (cf == 1)
+				t1 = INT_MAX;
+			else
+				t2 = INT_MAX;
+			continue;
+		}
+
+		if (!(c->flags & IEEE80211_CHAN_RADAR))
+			continue;
+
+		if (cf == 1 && c->dfs_cac_ms > t1)
+			t1 = c->dfs_cac_ms;
+
+		if (cf == 2 && c->dfs_cac_ms > t2)
+			t2 = c->dfs_cac_ms;
+	}
+
+	if (t1 == INT_MAX && t2 == INT_MAX)
+		return 0;
+
+	if (t1 == INT_MAX)
+		return t2;
+
+	if (t2 == INT_MAX)
+		return t1;
+
+	return max(t1, t2);
+}
+EXPORT_SYMBOL(cfg80211_chandef_dfs_cac_time);
+
+/* check if the operating channels are valid and supported */
+static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels,
+				 enum ieee80211_edmg_bw_config edmg_bw_config,
+				 int primary_channel,
+				 struct ieee80211_edmg *edmg_cap)
+{
+	struct ieee80211_channel *chan;
+	int i, freq;
+	int channels_counter = 0;
+
+	if (!edmg_channels && !edmg_bw_config)
+		return true;
+
+	if ((!edmg_channels && edmg_bw_config) ||
+	    (edmg_channels && !edmg_bw_config))
+		return false;
+
+	if (!(edmg_channels & BIT(primary_channel - 1)))
+		return false;
+
+	/* 60GHz channels 1..6 */
+	for (i = 0; i < 6; i++) {
+		if (!(edmg_channels & BIT(i)))
+			continue;
+
+		if (!(edmg_cap->channels & BIT(i)))
+			return false;
+
+		channels_counter++;
+
+		freq = ieee80211_channel_to_frequency(i + 1,
+						      NL80211_BAND_60GHZ);
+		chan = ieee80211_get_channel(wiphy, freq);
+		if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
+			return false;
+	}
+
+	/* IEEE802.11 allows max 4 channels */
+	if (channels_counter > 4)
+		return false;
+
+	/* check bw_config is a subset of what driver supports
+	 * (see IEEE P802.11ay/D4.0 section 9.4.2.251, Table 13)
+	 */
+	if ((edmg_bw_config % 4) > (edmg_cap->bw_config % 4))
+		return false;
+
+	if (edmg_bw_config > edmg_cap->bw_config)
+		return false;
+
+	return true;
+}
+
+static bool cfg80211_s1g_usable(struct wiphy *wiphy,
+				const struct cfg80211_chan_def *chandef)
+{
+	u32 freq_khz;
+	const struct ieee80211_channel *chan;
+	u32 pri_khz = ieee80211_channel_to_khz(chandef->chan);
+	u32 end_khz = cfg80211_s1g_get_end_freq_khz(chandef);
+	u32 start_khz = cfg80211_s1g_get_start_freq_khz(chandef);
+	int width_mhz = cfg80211_chandef_get_width(chandef);
+	u32 prohibited_flags = IEEE80211_CHAN_DISABLED;
+
+	if (width_mhz >= 16)
+		prohibited_flags |= IEEE80211_CHAN_NO_16MHZ;
+	if (width_mhz >= 8)
+		prohibited_flags |= IEEE80211_CHAN_NO_8MHZ;
+	if (width_mhz >= 4)
+		prohibited_flags |= IEEE80211_CHAN_NO_4MHZ;
+
+	if (chandef->chan->flags & IEEE80211_CHAN_S1G_NO_PRIMARY)
+		return false;
+
+	if (pri_khz < start_khz || pri_khz > end_khz)
+		return false;
+
+	for_each_s1g_subchan(chandef, freq_khz) {
+		chan = ieee80211_get_channel_khz(wiphy, freq_khz);
+		if (!chan || (chan->flags & prohibited_flags))
+			return false;
+	}
+
+	if (chandef->s1g_primary_2mhz) {
+		u32 sib_khz;
+		const struct ieee80211_channel *sibling;
+
+		sibling = cfg80211_s1g_get_primary_sibling(wiphy, chandef);
+		if (!sibling)
+			return false;
+
+		if (sibling->flags & IEEE80211_CHAN_S1G_NO_PRIMARY)
+			return false;
+
+		sib_khz = ieee80211_channel_to_khz(sibling);
+		if (sib_khz < start_khz || sib_khz > end_khz)
+			return false;
+	}
+
+	return true;
+}
+
+bool _cfg80211_chandef_usable(struct wiphy *wiphy,
+			      const struct cfg80211_chan_def *chandef,
+			      u32 prohibited_flags,
+			      u32 permitting_flags)
+{
+	struct ieee80211_sta_ht_cap *ht_cap;
+	struct ieee80211_sta_vht_cap *vht_cap;
+	struct ieee80211_edmg *edmg_cap;
+	u32 width, control_freq, cap;
+	bool ext_nss_cap, support_80_80 = false, support_320 = false;
+	const struct ieee80211_sband_iftype_data *iftd;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_channel *c;
+	int i;
+
+	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
+		return false;
+
+	ht_cap = &wiphy->bands[chandef->chan->band]->ht_cap;
+	vht_cap = &wiphy->bands[chandef->chan->band]->vht_cap;
+	edmg_cap = &wiphy->bands[chandef->chan->band]->edmg_cap;
+	ext_nss_cap = __le16_to_cpu(vht_cap->vht_mcs.tx_highest) &
+			IEEE80211_VHT_EXT_NSS_BW_CAPABLE;
+
+	if (cfg80211_chandef_is_s1g(chandef))
+		return cfg80211_s1g_usable(wiphy, chandef);
+
+	if (edmg_cap->channels &&
+	    !cfg80211_edmg_usable(wiphy,
+				  chandef->edmg.channels,
+				  chandef->edmg.bw_config,
+				  chandef->chan->hw_value,
+				  edmg_cap))
+		return false;
+
+	control_freq = chandef->chan->center_freq;
+
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_20:
+		if (!ht_cap->ht_supported &&
+		    chandef->chan->band != NL80211_BAND_6GHZ)
+			return false;
+		fallthrough;
+	case NL80211_CHAN_WIDTH_20_NOHT:
+		prohibited_flags |= IEEE80211_CHAN_NO_20MHZ;
+		width = 20;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+		width = 40;
+		if (chandef->chan->band == NL80211_BAND_6GHZ)
+			break;
+		if (!ht_cap->ht_supported)
+			return false;
+		if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
+		    ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)
+			return false;
+		if (chandef->center_freq1 < control_freq &&
+		    chandef->chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
+			return false;
+		if (chandef->center_freq1 > control_freq &&
+		    chandef->chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
+			return false;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+		cap = vht_cap->cap;
+		support_80_80 =
+			(cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
+			(cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
+			 cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
+			(ext_nss_cap &&
+			 u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1);
+		if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80)
+			return false;
+		fallthrough;
+	case NL80211_CHAN_WIDTH_80:
+		prohibited_flags |= IEEE80211_CHAN_NO_80MHZ;
+		width = 80;
+		if (chandef->chan->band == NL80211_BAND_6GHZ)
+			break;
+		if (!vht_cap->vht_supported)
+			return false;
+		break;
+	case NL80211_CHAN_WIDTH_160:
+		prohibited_flags |= IEEE80211_CHAN_NO_160MHZ;
+		width = 160;
+		if (chandef->chan->band == NL80211_BAND_6GHZ)
+			break;
+		if (!vht_cap->vht_supported)
+			return false;
+		cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
+		if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
+		    cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ &&
+		    !(ext_nss_cap &&
+		      (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)))
+			return false;
+		break;
+	case NL80211_CHAN_WIDTH_320:
+		prohibited_flags |= IEEE80211_CHAN_NO_320MHZ;
+		width = 320;
+
+		if (chandef->chan->band != NL80211_BAND_6GHZ)
+			return false;
+
+		sband = wiphy->bands[NL80211_BAND_6GHZ];
+		if (!sband)
+			return false;
+
+		for_each_sband_iftype_data(sband, i, iftd) {
+			if (!iftd->eht_cap.has_eht)
+				continue;
+
+			if (iftd->eht_cap.eht_cap_elem.phy_cap_info[0] &
+			    IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) {
+				support_320 = true;
+				break;
+			}
+		}
+
+		if (!support_320)
+			return false;
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return false;
+	}
+
+	/*
+	 * TODO: What if there are only certain 80/160/80+80 MHz channels
+	 *	 allowed by the driver, or only certain combinations?
+	 *	 For 40 MHz the driver can set the NO_HT40 flags, but for
+	 *	 80/160 MHz and in particular 80+80 MHz this isn't really
+	 *	 feasible and we only have NO_80MHZ/NO_160MHZ so far but
+	 *	 no way to cover 80+80 MHz or more complex restrictions.
+	 *	 Note that such restrictions also need to be advertised to
+	 *	 userspace, for example for P2P channel selection.
+	 */
+
+	if (width > 20)
+		prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
+
+	/* 5 and 10 MHz are only defined for the OFDM PHY */
+	if (width < 20)
+		prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
+
+	for_each_subchan(chandef, freq, cf) {
+		c = ieee80211_get_channel_khz(wiphy, freq);
+		if (!c)
+			return false;
+		if (c->flags & permitting_flags)
+			continue;
+		if (c->flags & prohibited_flags)
+			return false;
+	}
+
+	return true;
+}
+
+bool cfg80211_chandef_usable(struct wiphy *wiphy,
+			     const struct cfg80211_chan_def *chandef,
+			     u32 prohibited_flags)
+{
+	return _cfg80211_chandef_usable(wiphy, chandef, prohibited_flags, 0);
+}
+EXPORT_SYMBOL(cfg80211_chandef_usable);
+
+static bool cfg80211_ir_permissive_check_wdev(enum nl80211_iftype iftype,
+					      struct wireless_dev *wdev,
+					      struct ieee80211_channel *chan)
+{
+	struct ieee80211_channel *other_chan = NULL;
+	unsigned int link_id;
+	int r1, r2;
+
+	for_each_valid_link(wdev, link_id) {
+		if (wdev->iftype == NL80211_IFTYPE_STATION &&
+		    wdev->links[link_id].client.current_bss)
+			other_chan = wdev->links[link_id].client.current_bss->pub.channel;
+
+		/*
+		 * If a GO already operates on the same GO_CONCURRENT channel,
+		 * this one (maybe the same one) can beacon as well. We allow
+		 * the operation even if the station we relied on with
+		 * GO_CONCURRENT is disconnected now. But then we must make sure
+		 * we're not outdoor on an indoor-only channel.
+		 */
+		if (iftype == NL80211_IFTYPE_P2P_GO &&
+		    wdev->iftype == NL80211_IFTYPE_P2P_GO &&
+		    wdev->links[link_id].ap.beacon_interval &&
+		    !(chan->flags & IEEE80211_CHAN_INDOOR_ONLY))
+			other_chan = wdev->links[link_id].ap.chandef.chan;
+
+		if (!other_chan)
+			continue;
+
+		if (chan == other_chan)
+			return true;
+
+		if (chan->band != NL80211_BAND_5GHZ &&
+		    chan->band != NL80211_BAND_6GHZ)
+			continue;
+
+		r1 = cfg80211_get_unii(chan->center_freq);
+		r2 = cfg80211_get_unii(other_chan->center_freq);
+
+		if (r1 != -EINVAL && r1 == r2) {
+			/*
+			 * At some locations channels 149-165 are considered a
+			 * bundle, but at other locations, e.g., Indonesia,
+			 * channels 149-161 are considered a bundle while
+			 * channel 165 is left out and considered to be in a
+			 * different bundle. Thus, in case that there is a
+			 * station interface connected to an AP on channel 165,
+			 * it is assumed that channels 149-161 are allowed for
+			 * GO operations. However, having a station interface
+			 * connected to an AP on channels 149-161, does not
+			 * allow GO operation on channel 165.
+			 */
+			if (chan->center_freq == 5825 &&
+			    other_chan->center_freq != 5825)
+				continue;
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/*
+ * Check if the channel can be used under permissive conditions mandated by
+ * some regulatory bodies, i.e., the channel is marked with
+ * IEEE80211_CHAN_IR_CONCURRENT and there is an additional station interface
+ * associated to an AP on the same channel or on the same UNII band
+ * (assuming that the AP is an authorized master).
+ * In addition allow operation on a channel on which indoor operation is
+ * allowed, iff we are currently operating in an indoor environment.
+ */
+static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy,
+					enum nl80211_iftype iftype,
+					struct ieee80211_channel *chan)
+{
+	struct wireless_dev *wdev;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	lockdep_assert_held(&rdev->wiphy.mtx);
+
+	if (!IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) ||
+	    !(wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR))
+		return false;
+
+	/* only valid for GO and TDLS off-channel (station/p2p-CL) */
+	if (iftype != NL80211_IFTYPE_P2P_GO &&
+	    iftype != NL80211_IFTYPE_STATION &&
+	    iftype != NL80211_IFTYPE_P2P_CLIENT)
+		return false;
+
+	if (regulatory_indoor_allowed() &&
+	    (chan->flags & IEEE80211_CHAN_INDOOR_ONLY))
+		return true;
+
+	if (!(chan->flags & IEEE80211_CHAN_IR_CONCURRENT))
+		return false;
+
+	/*
+	 * Generally, it is possible to rely on another device/driver to allow
+	 * the IR concurrent relaxation, however, since the device can further
+	 * enforce the relaxation (by doing a similar verifications as this),
+	 * and thus fail the GO instantiation, consider only the interfaces of
+	 * the current registered device.
+	 */
+	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
+		bool ret;
+
+		ret = cfg80211_ir_permissive_check_wdev(iftype, wdev, chan);
+		if (ret)
+			return ret;
+	}
+
+	return false;
+}
+
+static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy,
+				     struct cfg80211_chan_def *chandef,
+				     enum nl80211_iftype iftype,
+				     u32 prohibited_flags,
+				     u32 permitting_flags)
+{
+	bool res, check_radar;
+	int dfs_required;
+
+	trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype,
+				      prohibited_flags,
+				      permitting_flags);
+
+	if (!_cfg80211_chandef_usable(wiphy, chandef,
+				      IEEE80211_CHAN_DISABLED, 0))
+		return false;
+
+	dfs_required = cfg80211_chandef_dfs_required(wiphy, chandef, iftype);
+	check_radar = dfs_required != 0;
+
+	if (dfs_required > 0 &&
+	    cfg80211_chandef_dfs_available(wiphy, chandef)) {
+		/* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */
+		prohibited_flags &= ~IEEE80211_CHAN_NO_IR;
+		check_radar = false;
+	}
+
+	if (check_radar &&
+	    !_cfg80211_chandef_usable(wiphy, chandef,
+				      IEEE80211_CHAN_RADAR, 0))
+		return false;
+
+	res = _cfg80211_chandef_usable(wiphy, chandef,
+				       prohibited_flags,
+				       permitting_flags);
+
+	trace_cfg80211_return_bool(res);
+	return res;
+}
+
+bool cfg80211_reg_check_beaconing(struct wiphy *wiphy,
+				  struct cfg80211_chan_def *chandef,
+				  struct cfg80211_beaconing_check_config *cfg)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	u32 permitting_flags = 0;
+	bool check_no_ir = true;
+
+	/*
+	 * Under certain conditions suggested by some regulatory bodies a
+	 * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag
+	 * only if such relaxations are not enabled and the conditions are not
+	 * met.
+	 */
+	if (cfg->relax) {
+		lockdep_assert_held(&rdev->wiphy.mtx);
+		check_no_ir = !cfg80211_ir_permissive_chan(wiphy, cfg->iftype,
+							   chandef->chan);
+	}
+
+	if (cfg->reg_power == IEEE80211_REG_VLP_AP)
+		permitting_flags |= IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP;
+
+	if ((cfg->iftype == NL80211_IFTYPE_P2P_GO ||
+	     cfg->iftype == NL80211_IFTYPE_AP) &&
+	    (chandef->width == NL80211_CHAN_WIDTH_20_NOHT ||
+	     chandef->width == NL80211_CHAN_WIDTH_20))
+		permitting_flags |= IEEE80211_CHAN_ALLOW_20MHZ_ACTIVITY;
+
+	return _cfg80211_reg_can_beacon(wiphy, chandef, cfg->iftype,
+					check_no_ir ? IEEE80211_CHAN_NO_IR : 0,
+					permitting_flags);
+}
+EXPORT_SYMBOL(cfg80211_reg_check_beaconing);
+
+int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
+				 struct net_device *dev,
+				 struct cfg80211_chan_def *chandef)
+{
+	if (!rdev->ops->set_monitor_channel)
+		return -EOPNOTSUPP;
+	if (!cfg80211_has_monitors_only(rdev))
+		return -EBUSY;
+
+	return rdev_set_monitor_channel(rdev, dev, chandef);
+}
+
+bool cfg80211_any_usable_channels(struct wiphy *wiphy,
+				  unsigned long sband_mask,
+				  u32 prohibited_flags)
+{
+	int idx;
+
+	prohibited_flags |= IEEE80211_CHAN_DISABLED;
+
+	for_each_set_bit(idx, &sband_mask, NUM_NL80211_BANDS) {
+		struct ieee80211_supported_band *sband = wiphy->bands[idx];
+		int chanidx;
+
+		if (!sband)
+			continue;
+
+		for (chanidx = 0; chanidx < sband->n_channels; chanidx++) {
+			struct ieee80211_channel *chan;
+
+			chan = &sband->channels[chanidx];
+
+			if (chan->flags & prohibited_flags)
+				continue;
+
+			return true;
+		}
+	}
+
+	return false;
+}
+EXPORT_SYMBOL(cfg80211_any_usable_channels);
+
+struct cfg80211_chan_def *wdev_chandef(struct wireless_dev *wdev,
+				       unsigned int link_id)
+{
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	WARN_ON(wdev->valid_links && !(wdev->valid_links & BIT(link_id)));
+	WARN_ON(!wdev->valid_links && link_id > 0);
+
+	switch (wdev->iftype) {
+	case NL80211_IFTYPE_MESH_POINT:
+		return &wdev->u.mesh.chandef;
+	case NL80211_IFTYPE_ADHOC:
+		return &wdev->u.ibss.chandef;
+	case NL80211_IFTYPE_OCB:
+		return &wdev->u.ocb.chandef;
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_P2P_GO:
+		return &wdev->links[link_id].ap.chandef;
+	default:
+		return NULL;
+	}
+}
+EXPORT_SYMBOL(wdev_chandef);