drivers/net/wireless/intel/iwlwifi/mvm/coex.c - third_party/kernel - Git at Google

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
  * Copyright (C) 2013-2014, 2018-2020, 2022 Intel Corporation
  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
  */
 #include <linux/ieee80211.h>
 #include <linux/etherdevice.h>
 #include <net/mac80211.h>

 #include "fw/api/coex.h"
 #include "iwl-modparams.h"
 #include "mvm.h"
 #include "iwl-debug.h"

 /* 20MHz / 40MHz below / 40Mhz above*/
 static const __le64 iwl_ci_mask[][3] = {
 	/* dummy entry for channel 0 */
 	{cpu_to_le64(0), cpu_to_le64(0), cpu_to_le64(0)},
 	{
 		cpu_to_le64(0x0000001FFFULL),
 		cpu_to_le64(0x0ULL),
 		cpu_to_le64(0x00007FFFFFULL),
 	},
 	{
 		cpu_to_le64(0x000000FFFFULL),
 		cpu_to_le64(0x0ULL),
 		cpu_to_le64(0x0003FFFFFFULL),
 	},
 	{
 		cpu_to_le64(0x000003FFFCULL),
 		cpu_to_le64(0x0ULL),
 		cpu_to_le64(0x000FFFFFFCULL),
 	},
 	{
 		cpu_to_le64(0x00001FFFE0ULL),
 		cpu_to_le64(0x0ULL),
 		cpu_to_le64(0x007FFFFFE0ULL),
 	},
 	{
 		cpu_to_le64(0x00007FFF80ULL),
 		cpu_to_le64(0x00007FFFFFULL),
 		cpu_to_le64(0x01FFFFFF80ULL),
 	},
 	{
 		cpu_to_le64(0x0003FFFC00ULL),
 		cpu_to_le64(0x0003FFFFFFULL),
 		cpu_to_le64(0x0FFFFFFC00ULL),
 	},
 	{
 		cpu_to_le64(0x000FFFF000ULL),
 		cpu_to_le64(0x000FFFFFFCULL),
 		cpu_to_le64(0x3FFFFFF000ULL),
 	},
 	{
 		cpu_to_le64(0x007FFF8000ULL),
 		cpu_to_le64(0x007FFFFFE0ULL),
 		cpu_to_le64(0xFFFFFF8000ULL),
 	},
 	{
 		cpu_to_le64(0x01FFFE0000ULL),
 		cpu_to_le64(0x01FFFFFF80ULL),
 		cpu_to_le64(0xFFFFFE0000ULL),
 	},
 	{
 		cpu_to_le64(0x0FFFF00000ULL),
 		cpu_to_le64(0x0FFFFFFC00ULL),
 		cpu_to_le64(0x0ULL),
 	},
 	{
 		cpu_to_le64(0x3FFFC00000ULL),
 		cpu_to_le64(0x3FFFFFF000ULL),
 		cpu_to_le64(0x0)
 	},
 	{
 		cpu_to_le64(0xFFFE000000ULL),
 		cpu_to_le64(0xFFFFFF8000ULL),
 		cpu_to_le64(0x0)
 	},
 	{
 		cpu_to_le64(0xFFF8000000ULL),
 		cpu_to_le64(0xFFFFFE0000ULL),
 		cpu_to_le64(0x0)
 	},
 	{
 		cpu_to_le64(0xFE00000000ULL),
 		cpu_to_le64(0x0ULL),
 		cpu_to_le64(0x0ULL)
 	},
 };

 static enum iwl_bt_coex_lut_type
 iwl_get_coex_type(struct iwl_mvm *mvm, const struct ieee80211_vif *vif)
 {
 	struct ieee80211_chanctx_conf *chanctx_conf;
 	enum iwl_bt_coex_lut_type ret;
 	u16 phy_ctx_id;
 	u32 primary_ch_phy_id, secondary_ch_phy_id;

 	/*
 	 * Checking that we hold mvm->mutex is a good idea, but the rate
 	 * control can't acquire the mutex since it runs in Tx path.
 	 * So this is racy in that case, but in the worst case, the AMPDU
 	 * size limit will be wrong for a short time which is not a big
 	 * issue.
 	 */

 	rcu_read_lock();

 	chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);

 	if (!chanctx_conf ||
 	     chanctx_conf->def.chan->band != NL80211_BAND_2GHZ) {
 		rcu_read_unlock();
 		return BT_COEX_INVALID_LUT;
 	}

 	ret = BT_COEX_TX_DIS_LUT;

 	if (mvm->cfg->bt_shared_single_ant) {
 		rcu_read_unlock();
 		return ret;
 	}

 	phy_ctx_id = *((u16 *)chanctx_conf->drv_priv);
 	primary_ch_phy_id = le32_to_cpu(mvm->last_bt_ci_cmd.primary_ch_phy_id);
 	secondary_ch_phy_id =
 		le32_to_cpu(mvm->last_bt_ci_cmd.secondary_ch_phy_id);

 	if (primary_ch_phy_id == phy_ctx_id)
 		ret = le32_to_cpu(mvm->last_bt_notif.primary_ch_lut);
 	else if (secondary_ch_phy_id == phy_ctx_id)
 		ret = le32_to_cpu(mvm->last_bt_notif.secondary_ch_lut);
 	/* else - default = TX TX disallowed */

 	rcu_read_unlock();

 	return ret;
 }

 int iwl_mvm_send_bt_init_conf(struct iwl_mvm *mvm)
 {
 	struct iwl_bt_coex_cmd bt_cmd = {};
 	u32 mode;

 	lockdep_assert_held(&mvm->mutex);

 	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS)) {
 		switch (mvm->bt_force_ant_mode) {
 		case BT_FORCE_ANT_BT:
 			mode = BT_COEX_BT;
 			break;
 		case BT_FORCE_ANT_WIFI:
 			mode = BT_COEX_WIFI;
 			break;
 		default:
 			WARN_ON(1);
 			mode = 0;
 		}

 		bt_cmd.mode = cpu_to_le32(mode);
 		goto send_cmd;
 	}

 	bt_cmd.mode = cpu_to_le32(BT_COEX_NW);

 	if (IWL_MVM_BT_COEX_SYNC2SCO)
 		bt_cmd.enabled_modules |=
 			cpu_to_le32(BT_COEX_SYNC2SCO_ENABLED);

 	if (iwl_mvm_is_mplut_supported(mvm))
 		bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_MPLUT_ENABLED);

 	bt_cmd.enabled_modules |= cpu_to_le32(BT_COEX_HIGH_BAND_RET);

 send_cmd:
 	memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
 	memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));

 	return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, 0, sizeof(bt_cmd), &bt_cmd);
 }

 static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
 				       bool enable)
 {
 	struct iwl_bt_coex_reduced_txp_update_cmd cmd = {};
 	struct iwl_mvm_sta *mvmsta;
 	u32 value;

 	mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
 	if (!mvmsta)
 		return 0;

 	/* nothing to do */
 	if (mvmsta->bt_reduced_txpower == enable)
 		return 0;

 	value = mvmsta->sta_id;

 	if (enable)
 		value |= BT_REDUCED_TX_POWER_BIT;

 	IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n",
 		       enable ? "en" : "dis", sta_id);

 	cmd.reduced_txp = cpu_to_le32(value);
 	mvmsta->bt_reduced_txpower = enable;

 	return iwl_mvm_send_cmd_pdu(mvm, BT_COEX_UPDATE_REDUCED_TXP,
 				    CMD_ASYNC, sizeof(cmd), &cmd);
 }

 struct iwl_bt_iterator_data {
 	struct iwl_bt_coex_profile_notif *notif;
 	struct iwl_mvm *mvm;
 	struct ieee80211_chanctx_conf *primary;
 	struct ieee80211_chanctx_conf *secondary;
 	bool primary_ll;
 	u8 primary_load;
 	u8 secondary_load;
 };

 static inline
 void iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm *mvm,
 				       struct ieee80211_vif *vif,
 				       bool enable, int rssi)
 {
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

 	mvmvif->bf_data.last_bt_coex_event = rssi;
 	mvmvif->bf_data.bt_coex_max_thold =
 		enable ? -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH : 0;
 	mvmvif->bf_data.bt_coex_min_thold =
 		enable ? -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH : 0;
 }

 #define MVM_COEX_TCM_PERIOD (HZ * 10)

 static void iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm *mvm,
 					 struct iwl_bt_iterator_data *data)
 {
 	unsigned long now = jiffies;

 	if (!time_after(now, mvm->bt_coex_last_tcm_ts + MVM_COEX_TCM_PERIOD))
 		return;

 	mvm->bt_coex_last_tcm_ts = now;

 	/* We assume here that we don't have more than 2 vifs on 2.4GHz */

 	/* if the primary is low latency, it will stay primary */
 	if (data->primary_ll)
 		return;

 	if (data->primary_load >= data->secondary_load)
 		return;

 	swap(data->primary, data->secondary);
 }

 /* must be called under rcu_read_lock */
 static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac,
 				      struct ieee80211_vif *vif)
 {
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	struct iwl_bt_iterator_data *data = _data;
 	struct iwl_mvm *mvm = data->mvm;
 	struct ieee80211_chanctx_conf *chanctx_conf;
 	/* default smps_mode is AUTOMATIC - only used for client modes */
 	enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
 	u32 bt_activity_grading, min_ag_for_static_smps;
 	int ave_rssi;

 	lockdep_assert_held(&mvm->mutex);

 	switch (vif->type) {
 	case NL80211_IFTYPE_STATION:
 		break;
 	case NL80211_IFTYPE_AP:
 		if (!mvmvif->ap_ibss_active)
 			return;
 		break;
 	default:
 		return;
 	}

 	chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);

 	/* If channel context is invalid or not on 2.4GHz .. */
 	if ((!chanctx_conf ||
 	     chanctx_conf->def.chan->band != NL80211_BAND_2GHZ)) {
 		if (vif->type == NL80211_IFTYPE_STATION) {
 			/* ... relax constraints and disable rssi events */
 			iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
 					    smps_mode);
 			iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
 						    false);
 			iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
 		}
 		return;
 	}

 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2))
 		min_ag_for_static_smps = BT_VERY_HIGH_TRAFFIC;
 	else
 		min_ag_for_static_smps = BT_HIGH_TRAFFIC;

 	bt_activity_grading = le32_to_cpu(data->notif->bt_activity_grading);
 	if (bt_activity_grading >= min_ag_for_static_smps)
 		smps_mode = IEEE80211_SMPS_STATIC;
 	else if (bt_activity_grading >= BT_LOW_TRAFFIC)
 		smps_mode = IEEE80211_SMPS_DYNAMIC;

 	/* relax SMPS constraints for next association */
 	if (!vif->cfg.assoc)
 		smps_mode = IEEE80211_SMPS_AUTOMATIC;

 	if (mvmvif->phy_ctxt &&
 	    (mvm->last_bt_notif.rrc_status & BIT(mvmvif->phy_ctxt->id)))
 		smps_mode = IEEE80211_SMPS_AUTOMATIC;

 	IWL_DEBUG_COEX(data->mvm,
 		       "mac %d: bt_activity_grading %d smps_req %d\n",
 		       mvmvif->id, bt_activity_grading, smps_mode);

 	if (vif->type == NL80211_IFTYPE_STATION)
 		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
 				    smps_mode);

 	/* low latency is always primary */
 	if (iwl_mvm_vif_low_latency(mvmvif)) {
 		data->primary_ll = true;

 		data->secondary = data->primary;
 		data->primary = chanctx_conf;
 	}

 	if (vif->type == NL80211_IFTYPE_AP) {
 		if (!mvmvif->ap_ibss_active)
 			return;

 		if (chanctx_conf == data->primary)
 			return;

 		if (!data->primary_ll) {
 			/*
 			 * downgrade the current primary no matter what its
 			 * type is.
 			 */
 			data->secondary = data->primary;
 			data->primary = chanctx_conf;
 		} else {
 			/* there is low latency vif - we will be secondary */
 			data->secondary = chanctx_conf;
 		}

 		if (data->primary == chanctx_conf)
 			data->primary_load = mvm->tcm.result.load[mvmvif->id];
 		else if (data->secondary == chanctx_conf)
 			data->secondary_load = mvm->tcm.result.load[mvmvif->id];
 		return;
 	}

 	/*
 	 * STA / P2P Client, try to be primary if first vif. If we are in low
 	 * latency mode, we are already in primary and just don't do much
 	 */
 	if (!data->primary || data->primary == chanctx_conf)
 		data->primary = chanctx_conf;
 	else if (!data->secondary)
 		/* if secondary is not NULL, it might be a GO */
 		data->secondary = chanctx_conf;

 	if (data->primary == chanctx_conf)
 		data->primary_load = mvm->tcm.result.load[mvmvif->id];
 	else if (data->secondary == chanctx_conf)
 		data->secondary_load = mvm->tcm.result.load[mvmvif->id];
 	/*
 	 * don't reduce the Tx power if one of these is true:
 	 *  we are in LOOSE
 	 *  single share antenna product
 	 *  BT is inactive
 	 *  we are not associated
 	 */
 	if (iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT ||
 	    mvm->cfg->bt_shared_single_ant || !vif->cfg.assoc ||
 	    le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF) {
 		iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false);
 		iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
 		return;
 	}

 	/* try to get the avg rssi from fw */
 	ave_rssi = mvmvif->bf_data.ave_beacon_signal;

 	/* if the RSSI isn't valid, fake it is very low */
 	if (!ave_rssi)
 		ave_rssi = -100;
 	if (ave_rssi > -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH) {
 		if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true))
 			IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
 	} else if (ave_rssi < -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH) {
 		if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
 			IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
 	}

 	/* Begin to monitor the RSSI: it may influence the reduced Tx power */
 	iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, true, ave_rssi);
 }

 static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
 {
 	struct iwl_bt_iterator_data data = {
 		.mvm = mvm,
 		.notif = &mvm->last_bt_notif,
 	};
 	struct iwl_bt_coex_ci_cmd cmd = {};
 	u8 ci_bw_idx;

 	/* Ignore updates if we are in force mode */
 	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
 		return;

 	rcu_read_lock();
 	ieee80211_iterate_active_interfaces_atomic(
 					mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 					iwl_mvm_bt_notif_iterator, &data);

 	iwl_mvm_bt_coex_tcm_based_ci(mvm, &data);

 	if (data.primary) {
 		struct ieee80211_chanctx_conf *chan = data.primary;
 		if (WARN_ON(!chan->def.chan)) {
 			rcu_read_unlock();
 			return;
 		}

 		if (chan->def.width < NL80211_CHAN_WIDTH_40) {
 			ci_bw_idx = 0;
 		} else {
 			if (chan->def.center_freq1 >
 			    chan->def.chan->center_freq)
 				ci_bw_idx = 2;
 			else
 				ci_bw_idx = 1;
 		}

 		cmd.bt_primary_ci =
 			iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
 		cmd.primary_ch_phy_id =
 			cpu_to_le32(*((u16 *)data.primary->drv_priv));
 	}

 	if (data.secondary) {
 		struct ieee80211_chanctx_conf *chan = data.secondary;
 		if (WARN_ON(!data.secondary->def.chan)) {
 			rcu_read_unlock();
 			return;
 		}

 		if (chan->def.width < NL80211_CHAN_WIDTH_40) {
 			ci_bw_idx = 0;
 		} else {
 			if (chan->def.center_freq1 >
 			    chan->def.chan->center_freq)
 				ci_bw_idx = 2;
 			else
 				ci_bw_idx = 1;
 		}

 		cmd.bt_secondary_ci =
 			iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
 		cmd.secondary_ch_phy_id =
 			cpu_to_le32(*((u16 *)data.secondary->drv_priv));
 	}

 	rcu_read_unlock();

 	/* Don't spam the fw with the same command over and over */
 	if (memcmp(&cmd, &mvm->last_bt_ci_cmd, sizeof(cmd))) {
 		if (iwl_mvm_send_cmd_pdu(mvm, BT_COEX_CI, 0,
 					 sizeof(cmd), &cmd))
 			IWL_ERR(mvm, "Failed to send BT_CI cmd\n");
 		memcpy(&mvm->last_bt_ci_cmd, &cmd, sizeof(cmd));
 	}
 }

 void iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
 			      struct iwl_rx_cmd_buffer *rxb)
 {
 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
 	struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data;

 	IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
 	IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);
 	IWL_DEBUG_COEX(mvm, "\tBT primary_ch_lut %d\n",
 		       le32_to_cpu(notif->primary_ch_lut));
 	IWL_DEBUG_COEX(mvm, "\tBT secondary_ch_lut %d\n",
 		       le32_to_cpu(notif->secondary_ch_lut));
 	IWL_DEBUG_COEX(mvm, "\tBT activity grading %d\n",
 		       le32_to_cpu(notif->bt_activity_grading));

 	/* remember this notification for future use: rssi fluctuations */
 	memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));

 	iwl_mvm_bt_coex_notif_handle(mvm);
 }

 void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 			   enum ieee80211_rssi_event_data rssi_event)
 {
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	int ret;

 	lockdep_assert_held(&mvm->mutex);

 	/* Ignore updates if we are in force mode */
 	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
 		return;

 	/*
 	 * Rssi update while not associated - can happen since the statistics
 	 * are handled asynchronously
 	 */
 	if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA)
 		return;

 	/* No BT - reports should be disabled */
 	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF)
 		return;

 	IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
 		       rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");

 	/*
 	 * Check if rssi is good enough for reduced Tx power, but not in loose
 	 * scheme.
 	 */
 	if (rssi_event == RSSI_EVENT_LOW || mvm->cfg->bt_shared_single_ant ||
 	    iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT)
 		ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
 						  false);
 	else
 		ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true);

 	if (ret)
 		IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");
 }

 #define LINK_QUAL_AGG_TIME_LIMIT_DEF	(4000)
 #define LINK_QUAL_AGG_TIME_LIMIT_BT_ACT	(1200)

 u16 iwl_mvm_coex_agg_time_limit(struct iwl_mvm *mvm,
 				struct ieee80211_sta *sta)
 {
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 	struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
 	enum iwl_bt_coex_lut_type lut_type;

 	if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
 		return LINK_QUAL_AGG_TIME_LIMIT_DEF;

 	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
 	    BT_HIGH_TRAFFIC)
 		return LINK_QUAL_AGG_TIME_LIMIT_DEF;

 	lut_type = iwl_get_coex_type(mvm, mvmsta->vif);

 	if (lut_type == BT_COEX_LOOSE_LUT || lut_type == BT_COEX_INVALID_LUT)
 		return LINK_QUAL_AGG_TIME_LIMIT_DEF;

 	/* tight coex, high bt traffic, reduce AGG time limit */
 	return LINK_QUAL_AGG_TIME_LIMIT_BT_ACT;
 }

 bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
 				     struct ieee80211_sta *sta)
 {
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
 	struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
 	enum iwl_bt_coex_lut_type lut_type;

 	if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
 		return true;

 	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
 	    BT_HIGH_TRAFFIC)
 		return true;

 	/*
 	 * In Tight / TxTxDis, BT can't Rx while we Tx, so use both antennas
 	 * since BT is already killed.
 	 * In Loose, BT can Rx while we Tx, so forbid MIMO to let BT Rx while
 	 * we Tx.
 	 * When we are in 5GHz, we'll get BT_COEX_INVALID_LUT allowing MIMO.
 	 */
 	lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
 	return lut_type != BT_COEX_LOOSE_LUT;
 }

 bool iwl_mvm_bt_coex_is_ant_avail(struct iwl_mvm *mvm, u8 ant)
 {
 	/* there is no other antenna, shared antenna is always available */
 	if (mvm->cfg->bt_shared_single_ant)
 		return true;

 	if (ant & mvm->cfg->non_shared_ant)
 		return true;

 	return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
 		BT_HIGH_TRAFFIC;
 }

 bool iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm *mvm)
 {
 	/* there is no other antenna, shared antenna is always available */
 	if (mvm->cfg->bt_shared_single_ant)
 		return true;

 	return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) < BT_HIGH_TRAFFIC;
 }

 bool iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm *mvm,
 				    enum nl80211_band band)
 {
 	u32 bt_activity = le32_to_cpu(mvm->last_bt_notif.bt_activity_grading);

 	if (band != NL80211_BAND_2GHZ)
 		return false;

 	return bt_activity >= BT_LOW_TRAFFIC;
 }

 u8 iwl_mvm_bt_coex_get_single_ant_msk(struct iwl_mvm *mvm, u8 enabled_ants)
 {
 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) &&
 	    (mvm->cfg->non_shared_ant & enabled_ants))
 		return mvm->cfg->non_shared_ant;

 	return first_antenna(enabled_ants);
 }

 u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
 			   struct ieee80211_tx_info *info, u8 ac)
 {
 	__le16 fc = hdr->frame_control;
 	bool mplut_enabled = iwl_mvm_is_mplut_supported(mvm);

 	if (info->band != NL80211_BAND_2GHZ)
 		return 0;

 	if (unlikely(mvm->bt_tx_prio))
 		return mvm->bt_tx_prio - 1;

 	if (likely(ieee80211_is_data(fc))) {
 		if (likely(ieee80211_is_data_qos(fc))) {
 			switch (ac) {
 			case IEEE80211_AC_BE:
 				return mplut_enabled ? 1 : 0;
 			case IEEE80211_AC_VI:
 				return mplut_enabled ? 2 : 3;
 			case IEEE80211_AC_VO:
 				return 3;
 			default:
 				return 0;
 			}
 		} else if (is_multicast_ether_addr(hdr->addr1)) {
 			return 3;
 		} else
 			return 0;
 	} else if (ieee80211_is_mgmt(fc)) {
 		return ieee80211_is_disassoc(fc) ? 0 : 3;
 	} else if (ieee80211_is_ctl(fc)) {
 		/* ignore cfend and cfendack frames as we never send those */
 		return 3;
 	}

 	return 0;
 }

 void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm)
 {
 	iwl_mvm_bt_coex_notif_handle(mvm);
 }
	// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
	/*
	* Copyright (C) 2013-2014, 2018-2020, 2022 Intel Corporation
	* Copyright (C) 2013-2015 Intel Mobile Communications GmbH
	*/
	#include <linux/ieee80211.h>
	#include <linux/etherdevice.h>
	#include <net/mac80211.h>

	#include "fw/api/coex.h"
	#include "iwl-modparams.h"
	#include "mvm.h"
	#include "iwl-debug.h"

	/* 20MHz / 40MHz below / 40Mhz above*/
	static const __le64 iwl_ci_mask[][3] = {
	/* dummy entry for channel 0 */
	{cpu_to_le64(0), cpu_to_le64(0), cpu_to_le64(0)},
	{
	cpu_to_le64(0x0000001FFFULL),
	cpu_to_le64(0x0ULL),
	cpu_to_le64(0x00007FFFFFULL),
	},
	{
	cpu_to_le64(0x000000FFFFULL),
	cpu_to_le64(0x0ULL),
	cpu_to_le64(0x0003FFFFFFULL),
	},
	{
	cpu_to_le64(0x000003FFFCULL),
	cpu_to_le64(0x0ULL),
	cpu_to_le64(0x000FFFFFFCULL),
	},
	{
	cpu_to_le64(0x00001FFFE0ULL),
	cpu_to_le64(0x0ULL),
	cpu_to_le64(0x007FFFFFE0ULL),
	},
	{
	cpu_to_le64(0x00007FFF80ULL),
	cpu_to_le64(0x00007FFFFFULL),
	cpu_to_le64(0x01FFFFFF80ULL),
	},
	{
	cpu_to_le64(0x0003FFFC00ULL),
	cpu_to_le64(0x0003FFFFFFULL),
	cpu_to_le64(0x0FFFFFFC00ULL),
	},
	{
	cpu_to_le64(0x000FFFF000ULL),
	cpu_to_le64(0x000FFFFFFCULL),
	cpu_to_le64(0x3FFFFFF000ULL),
	},
	{
	cpu_to_le64(0x007FFF8000ULL),
	cpu_to_le64(0x007FFFFFE0ULL),
	cpu_to_le64(0xFFFFFF8000ULL),
	},
	{
	cpu_to_le64(0x01FFFE0000ULL),
	cpu_to_le64(0x01FFFFFF80ULL),
	cpu_to_le64(0xFFFFFE0000ULL),
	},
	{
	cpu_to_le64(0x0FFFF00000ULL),
	cpu_to_le64(0x0FFFFFFC00ULL),
	cpu_to_le64(0x0ULL),
	},
	{
	cpu_to_le64(0x3FFFC00000ULL),
	cpu_to_le64(0x3FFFFFF000ULL),
	cpu_to_le64(0x0)
	},
	{
	cpu_to_le64(0xFFFE000000ULL),
	cpu_to_le64(0xFFFFFF8000ULL),
	cpu_to_le64(0x0)
	},
	{
	cpu_to_le64(0xFFF8000000ULL),
	cpu_to_le64(0xFFFFFE0000ULL),
	cpu_to_le64(0x0)
	},
	{
	cpu_to_le64(0xFE00000000ULL),
	cpu_to_le64(0x0ULL),
	cpu_to_le64(0x0ULL)
	},
	};

	static enum iwl_bt_coex_lut_type
	iwl_get_coex_type(struct iwl_mvm mvm, const struct ieee80211_vif vif)
	{
	struct ieee80211_chanctx_conf *chanctx_conf;
	enum iwl_bt_coex_lut_type ret;
	u16 phy_ctx_id;
	u32 primary_ch_phy_id, secondary_ch_phy_id;

	/*
	* Checking that we hold mvm->mutex is a good idea, but the rate
	* control can't acquire the mutex since it runs in Tx path.
	* So this is racy in that case, but in the worst case, the AMPDU
	* size limit will be wrong for a short time which is not a big
	* issue.
	*/

	rcu_read_lock();

	chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);

	if (!chanctx_conf \|\|
	chanctx_conf->def.chan->band != NL80211_BAND_2GHZ) {
	rcu_read_unlock();
	return BT_COEX_INVALID_LUT;
	}

	ret = BT_COEX_TX_DIS_LUT;

	if (mvm->cfg->bt_shared_single_ant) {
	rcu_read_unlock();
	return ret;
	}

	phy_ctx_id = ((u16 )chanctx_conf->drv_priv);
	primary_ch_phy_id = le32_to_cpu(mvm->last_bt_ci_cmd.primary_ch_phy_id);
	secondary_ch_phy_id =
	le32_to_cpu(mvm->last_bt_ci_cmd.secondary_ch_phy_id);

	if (primary_ch_phy_id == phy_ctx_id)
	ret = le32_to_cpu(mvm->last_bt_notif.primary_ch_lut);
	else if (secondary_ch_phy_id == phy_ctx_id)
	ret = le32_to_cpu(mvm->last_bt_notif.secondary_ch_lut);
	/* else - default = TX TX disallowed */

	rcu_read_unlock();

	return ret;
	}

	int iwl_mvm_send_bt_init_conf(struct iwl_mvm *mvm)
	{
	struct iwl_bt_coex_cmd bt_cmd = {};
	u32 mode;

	lockdep_assert_held(&mvm->mutex);

	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS)) {
	switch (mvm->bt_force_ant_mode) {
	case BT_FORCE_ANT_BT:
	mode = BT_COEX_BT;
	break;
	case BT_FORCE_ANT_WIFI:
	mode = BT_COEX_WIFI;
	break;
	default:
	WARN_ON(1);
	mode = 0;
	}

	bt_cmd.mode = cpu_to_le32(mode);
	goto send_cmd;
	}

	bt_cmd.mode = cpu_to_le32(BT_COEX_NW);

	if (IWL_MVM_BT_COEX_SYNC2SCO)
	bt_cmd.enabled_modules \|=
	cpu_to_le32(BT_COEX_SYNC2SCO_ENABLED);

	if (iwl_mvm_is_mplut_supported(mvm))
	bt_cmd.enabled_modules \|= cpu_to_le32(BT_COEX_MPLUT_ENABLED);

	bt_cmd.enabled_modules \|= cpu_to_le32(BT_COEX_HIGH_BAND_RET);

	send_cmd:
	memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
	memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));

	return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, 0, sizeof(bt_cmd), &bt_cmd);
	}

	static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
	bool enable)
	{
	struct iwl_bt_coex_reduced_txp_update_cmd cmd = {};
	struct iwl_mvm_sta *mvmsta;
	u32 value;

	mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
	if (!mvmsta)
	return 0;

	/* nothing to do */
	if (mvmsta->bt_reduced_txpower == enable)
	return 0;

	value = mvmsta->sta_id;

	if (enable)
	value \|= BT_REDUCED_TX_POWER_BIT;

	IWL_DEBUG_COEX(mvm, "%sable reduced Tx Power for sta %d\n",
	enable ? "en" : "dis", sta_id);

	cmd.reduced_txp = cpu_to_le32(value);
	mvmsta->bt_reduced_txpower = enable;

	return iwl_mvm_send_cmd_pdu(mvm, BT_COEX_UPDATE_REDUCED_TXP,
	CMD_ASYNC, sizeof(cmd), &cmd);
	}

	struct iwl_bt_iterator_data {
	struct iwl_bt_coex_profile_notif *notif;
	struct iwl_mvm *mvm;
	struct ieee80211_chanctx_conf *primary;
	struct ieee80211_chanctx_conf *secondary;
	bool primary_ll;
	u8 primary_load;
	u8 secondary_load;
	};

	static inline
	void iwl_mvm_bt_coex_enable_rssi_event(struct iwl_mvm *mvm,
	struct ieee80211_vif *vif,
	bool enable, int rssi)
	{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	mvmvif->bf_data.last_bt_coex_event = rssi;
	mvmvif->bf_data.bt_coex_max_thold =
	enable ? -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH : 0;
	mvmvif->bf_data.bt_coex_min_thold =
	enable ? -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH : 0;
	}

	#define MVM_COEX_TCM_PERIOD (HZ * 10)

	static void iwl_mvm_bt_coex_tcm_based_ci(struct iwl_mvm *mvm,
	struct iwl_bt_iterator_data *data)
	{
	unsigned long now = jiffies;

	if (!time_after(now, mvm->bt_coex_last_tcm_ts + MVM_COEX_TCM_PERIOD))
	return;

	mvm->bt_coex_last_tcm_ts = now;

	/* We assume here that we don't have more than 2 vifs on 2.4GHz */

	/* if the primary is low latency, it will stay primary */
	if (data->primary_ll)
	return;

	if (data->primary_load >= data->secondary_load)
	return;

	swap(data->primary, data->secondary);
	}

	/* must be called under rcu_read_lock */
	static void iwl_mvm_bt_notif_iterator(void _data, u8 mac,
	struct ieee80211_vif *vif)
	{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_bt_iterator_data *data = _data;
	struct iwl_mvm *mvm = data->mvm;
	struct ieee80211_chanctx_conf *chanctx_conf;
	/* default smps_mode is AUTOMATIC - only used for client modes */
	enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
	u32 bt_activity_grading, min_ag_for_static_smps;
	int ave_rssi;

	lockdep_assert_held(&mvm->mutex);

	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
	break;
	case NL80211_IFTYPE_AP:
	if (!mvmvif->ap_ibss_active)
	return;
	break;
	default:
	return;
	}

	chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);

	/* If channel context is invalid or not on 2.4GHz .. */
	if ((!chanctx_conf \|\|
	chanctx_conf->def.chan->band != NL80211_BAND_2GHZ)) {
	if (vif->type == NL80211_IFTYPE_STATION) {
	/* ... relax constraints and disable rssi events */
	iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
	smps_mode);
	iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
	false);
	iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
	}
	return;
	}

	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2))
	min_ag_for_static_smps = BT_VERY_HIGH_TRAFFIC;
	else
	min_ag_for_static_smps = BT_HIGH_TRAFFIC;

	bt_activity_grading = le32_to_cpu(data->notif->bt_activity_grading);
	if (bt_activity_grading >= min_ag_for_static_smps)
	smps_mode = IEEE80211_SMPS_STATIC;
	else if (bt_activity_grading >= BT_LOW_TRAFFIC)
	smps_mode = IEEE80211_SMPS_DYNAMIC;

	/* relax SMPS constraints for next association */
	if (!vif->cfg.assoc)
	smps_mode = IEEE80211_SMPS_AUTOMATIC;

	if (mvmvif->phy_ctxt &&
	(mvm->last_bt_notif.rrc_status & BIT(mvmvif->phy_ctxt->id)))
	smps_mode = IEEE80211_SMPS_AUTOMATIC;

	IWL_DEBUG_COEX(data->mvm,
	"mac %d: bt_activity_grading %d smps_req %d\n",
	mvmvif->id, bt_activity_grading, smps_mode);

	if (vif->type == NL80211_IFTYPE_STATION)
	iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
	smps_mode);

	/* low latency is always primary */
	if (iwl_mvm_vif_low_latency(mvmvif)) {
	data->primary_ll = true;

	data->secondary = data->primary;
	data->primary = chanctx_conf;
	}

	if (vif->type == NL80211_IFTYPE_AP) {
	if (!mvmvif->ap_ibss_active)
	return;

	if (chanctx_conf == data->primary)
	return;

	if (!data->primary_ll) {
	/*
	* downgrade the current primary no matter what its
	* type is.
	*/
	data->secondary = data->primary;
	data->primary = chanctx_conf;
	} else {
	/* there is low latency vif - we will be secondary */
	data->secondary = chanctx_conf;
	}

	if (data->primary == chanctx_conf)
	data->primary_load = mvm->tcm.result.load[mvmvif->id];
	else if (data->secondary == chanctx_conf)
	data->secondary_load = mvm->tcm.result.load[mvmvif->id];
	return;
	}

	/*
	* STA / P2P Client, try to be primary if first vif. If we are in low
	* latency mode, we are already in primary and just don't do much
	*/
	if (!data->primary \|\| data->primary == chanctx_conf)
	data->primary = chanctx_conf;
	else if (!data->secondary)
	/* if secondary is not NULL, it might be a GO */
	data->secondary = chanctx_conf;

	if (data->primary == chanctx_conf)
	data->primary_load = mvm->tcm.result.load[mvmvif->id];
	else if (data->secondary == chanctx_conf)
	data->secondary_load = mvm->tcm.result.load[mvmvif->id];
	/*
	* don't reduce the Tx power if one of these is true:
	* we are in LOOSE
	* single share antenna product
	* BT is inactive
	* we are not associated
	*/
	if (iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT \|\|
	mvm->cfg->bt_shared_single_ant \|\| !vif->cfg.assoc \|\|
	le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF) {
	iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false);
	iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
	return;
	}

	/* try to get the avg rssi from fw */
	ave_rssi = mvmvif->bf_data.ave_beacon_signal;

	/* if the RSSI isn't valid, fake it is very low */
	if (!ave_rssi)
	ave_rssi = -100;
	if (ave_rssi > -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH) {
	if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true))
	IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
	} else if (ave_rssi < -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH) {
	if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
	IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
	}

	/* Begin to monitor the RSSI: it may influence the reduced Tx power */
	iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, true, ave_rssi);
	}

	static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
	{
	struct iwl_bt_iterator_data data = {
	.mvm = mvm,
	.notif = &mvm->last_bt_notif,
	};
	struct iwl_bt_coex_ci_cmd cmd = {};
	u8 ci_bw_idx;

	/* Ignore updates if we are in force mode */
	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
	return;

	rcu_read_lock();
	ieee80211_iterate_active_interfaces_atomic(
	mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
	iwl_mvm_bt_notif_iterator, &data);

	iwl_mvm_bt_coex_tcm_based_ci(mvm, &data);

	if (data.primary) {
	struct ieee80211_chanctx_conf *chan = data.primary;
	if (WARN_ON(!chan->def.chan)) {
	rcu_read_unlock();
	return;
	}

	if (chan->def.width < NL80211_CHAN_WIDTH_40) {
	ci_bw_idx = 0;
	} else {
	if (chan->def.center_freq1 >
	chan->def.chan->center_freq)
	ci_bw_idx = 2;
	else
	ci_bw_idx = 1;
	}

	cmd.bt_primary_ci =
	iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
	cmd.primary_ch_phy_id =
	cpu_to_le32(((u16 )data.primary->drv_priv));
	}

	if (data.secondary) {
	struct ieee80211_chanctx_conf *chan = data.secondary;
	if (WARN_ON(!data.secondary->def.chan)) {
	rcu_read_unlock();
	return;
	}

	if (chan->def.width < NL80211_CHAN_WIDTH_40) {
	ci_bw_idx = 0;
	} else {
	if (chan->def.center_freq1 >
	chan->def.chan->center_freq)
	ci_bw_idx = 2;
	else
	ci_bw_idx = 1;
	}

	cmd.bt_secondary_ci =
	iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
	cmd.secondary_ch_phy_id =
	cpu_to_le32(((u16 )data.secondary->drv_priv));
	}

	rcu_read_unlock();

	/* Don't spam the fw with the same command over and over */
	if (memcmp(&cmd, &mvm->last_bt_ci_cmd, sizeof(cmd))) {
	if (iwl_mvm_send_cmd_pdu(mvm, BT_COEX_CI, 0,
	sizeof(cmd), &cmd))
	IWL_ERR(mvm, "Failed to send BT_CI cmd\n");
	memcpy(&mvm->last_bt_ci_cmd, &cmd, sizeof(cmd));
	}
	}

	void iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
	struct iwl_rx_cmd_buffer *rxb)
	{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_bt_coex_profile_notif notif = (void )pkt->data;

	IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
	IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);
	IWL_DEBUG_COEX(mvm, "\tBT primary_ch_lut %d\n",
	le32_to_cpu(notif->primary_ch_lut));
	IWL_DEBUG_COEX(mvm, "\tBT secondary_ch_lut %d\n",
	le32_to_cpu(notif->secondary_ch_lut));
	IWL_DEBUG_COEX(mvm, "\tBT activity grading %d\n",
	le32_to_cpu(notif->bt_activity_grading));

	/* remember this notification for future use: rssi fluctuations */
	memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));

	iwl_mvm_bt_coex_notif_handle(mvm);
	}

	void iwl_mvm_bt_rssi_event(struct iwl_mvm mvm, struct ieee80211_vif vif,
	enum ieee80211_rssi_event_data rssi_event)
	{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

	lockdep_assert_held(&mvm->mutex);

	/* Ignore updates if we are in force mode */
	if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
	return;

	/*
	* Rssi update while not associated - can happen since the statistics
	* are handled asynchronously
	*/
	if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA)
	return;

	/* No BT - reports should be disabled */
	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF)
	return;

	IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
	rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");

	/*
	* Check if rssi is good enough for reduced Tx power, but not in loose
	* scheme.
	*/
	if (rssi_event == RSSI_EVENT_LOW \|\| mvm->cfg->bt_shared_single_ant \|\|
	iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT)
	ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
	false);
	else
	ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true);

	if (ret)
	IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");
	}

	#define LINK_QUAL_AGG_TIME_LIMIT_DEF (4000)
	#define LINK_QUAL_AGG_TIME_LIMIT_BT_ACT (1200)

	u16 iwl_mvm_coex_agg_time_limit(struct iwl_mvm *mvm,
	struct ieee80211_sta *sta)
	{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
	struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
	enum iwl_bt_coex_lut_type lut_type;

	if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
	return LINK_QUAL_AGG_TIME_LIMIT_DEF;

	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
	BT_HIGH_TRAFFIC)
	return LINK_QUAL_AGG_TIME_LIMIT_DEF;

	lut_type = iwl_get_coex_type(mvm, mvmsta->vif);

	if (lut_type == BT_COEX_LOOSE_LUT \|\| lut_type == BT_COEX_INVALID_LUT)
	return LINK_QUAL_AGG_TIME_LIMIT_DEF;

	/* tight coex, high bt traffic, reduce AGG time limit */
	return LINK_QUAL_AGG_TIME_LIMIT_BT_ACT;
	}

	bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
	struct ieee80211_sta *sta)
	{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
	struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
	enum iwl_bt_coex_lut_type lut_type;

	if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
	return true;

	if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
	BT_HIGH_TRAFFIC)
	return true;

	/*
	* In Tight / TxTxDis, BT can't Rx while we Tx, so use both antennas
	* since BT is already killed.
	* In Loose, BT can Rx while we Tx, so forbid MIMO to let BT Rx while
	* we Tx.
	* When we are in 5GHz, we'll get BT_COEX_INVALID_LUT allowing MIMO.
	*/
	lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
	return lut_type != BT_COEX_LOOSE_LUT;
	}

	bool iwl_mvm_bt_coex_is_ant_avail(struct iwl_mvm *mvm, u8 ant)
	{
	/* there is no other antenna, shared antenna is always available */
	if (mvm->cfg->bt_shared_single_ant)
	return true;

	if (ant & mvm->cfg->non_shared_ant)
	return true;

	return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
	BT_HIGH_TRAFFIC;
	}

	bool iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm *mvm)
	{
	/* there is no other antenna, shared antenna is always available */
	if (mvm->cfg->bt_shared_single_ant)
	return true;

	return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) < BT_HIGH_TRAFFIC;
	}

	bool iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm *mvm,
	enum nl80211_band band)
	{
	u32 bt_activity = le32_to_cpu(mvm->last_bt_notif.bt_activity_grading);

	if (band != NL80211_BAND_2GHZ)
	return false;

	return bt_activity >= BT_LOW_TRAFFIC;
	}

	u8 iwl_mvm_bt_coex_get_single_ant_msk(struct iwl_mvm *mvm, u8 enabled_ants)
	{
	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_COEX_SCHEMA_2) &&
	(mvm->cfg->non_shared_ant & enabled_ants))
	return mvm->cfg->non_shared_ant;

	return first_antenna(enabled_ants);
	}

	u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm mvm, struct ieee80211_hdr hdr,
	struct ieee80211_tx_info *info, u8 ac)
	{
	__le16 fc = hdr->frame_control;
	bool mplut_enabled = iwl_mvm_is_mplut_supported(mvm);

	if (info->band != NL80211_BAND_2GHZ)
	return 0;

	if (unlikely(mvm->bt_tx_prio))
	return mvm->bt_tx_prio - 1;

	if (likely(ieee80211_is_data(fc))) {
	if (likely(ieee80211_is_data_qos(fc))) {
	switch (ac) {
	case IEEE80211_AC_BE:
	return mplut_enabled ? 1 : 0;
	case IEEE80211_AC_VI:
	return mplut_enabled ? 2 : 3;
	case IEEE80211_AC_VO:
	return 3;
	default:
	return 0;
	}
	} else if (is_multicast_ether_addr(hdr->addr1)) {
	return 3;
	} else
	return 0;
	} else if (ieee80211_is_mgmt(fc)) {
	return ieee80211_is_disassoc(fc) ? 0 : 3;
	} else if (ieee80211_is_ctl(fc)) {
	/* ignore cfend and cfendack frames as we never send those */
	return 3;
	}

	return 0;
	}

	void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm)
	{
	iwl_mvm_bt_coex_notif_handle(mvm);
	}