/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2013 - 2014, 2018 - 2020 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2013 - 2014, 2018 - 2020 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/

#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->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->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->bss_conf.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->bss_conf.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);
}