// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
 * Copyright (C) 2024-2026 Intel Corporation
 */

#include <net/mac80211.h>

#include "tlc.h"
#include "hcmd.h"
#include "sta.h"
#include "phy.h"
#include "iface.h"

#include "fw/api/rs.h"
#include "fw/api/context.h"
#include "fw/api/dhc.h"

static u8 iwl_mld_fw_bw_from_sta_bw(enum ieee80211_sta_rx_bandwidth bandwidth)
{
        switch (bandwidth) {
        case IEEE80211_STA_RX_BW_320:
                return IWL_TLC_MNG_CH_WIDTH_320MHZ;
        case IEEE80211_STA_RX_BW_160:
                return IWL_TLC_MNG_CH_WIDTH_160MHZ;
        case IEEE80211_STA_RX_BW_80:
                return IWL_TLC_MNG_CH_WIDTH_80MHZ;
        case IEEE80211_STA_RX_BW_40:
                return IWL_TLC_MNG_CH_WIDTH_40MHZ;
        case IEEE80211_STA_RX_BW_20:
        default:
                return IWL_TLC_MNG_CH_WIDTH_20MHZ;
        }
}

struct iwl_mld_tlc_sta_capa {
        u16 non_ht_rates;
        u16 max_amsdu_len;
        u8 rx_nss;
        enum ieee80211_sta_rx_bandwidth bandwidth;
        enum ieee80211_smps_mode smps_mode;
        const struct ieee80211_sta_ht_cap *ht_cap;
        const struct ieee80211_sta_vht_cap *vht_cap;
        const struct ieee80211_sta_he_cap *he_cap;
        const struct ieee80211_sta_eht_cap *eht_cap;
        const struct ieee80211_sta_uhr_cap *uhr_cap;

        const struct ieee80211_sta_he_cap *own_he_cap;
        const struct ieee80211_sta_eht_cap *own_eht_cap;
        const struct ieee80211_sta_uhr_cap *own_uhr_cap;
};

static __le16
iwl_mld_get_tlc_cmd_flags(struct iwl_mld *mld,
                          struct iwl_mld_tlc_sta_capa *capa)
{
        const struct ieee80211_sta_ht_cap *ht_cap = capa->ht_cap;
        const struct ieee80211_sta_vht_cap *vht_cap = capa->vht_cap;
        const struct ieee80211_sta_he_cap *he_cap = capa->he_cap;
        const struct ieee80211_sta_eht_cap *eht_cap = capa->eht_cap;
        const struct ieee80211_sta_uhr_cap *uhr_cap = capa->uhr_cap;
        const struct ieee80211_sta_he_cap *own_he_cap = capa->own_he_cap;
        const struct ieee80211_sta_eht_cap *own_eht_cap = capa->own_eht_cap;
        const struct ieee80211_sta_uhr_cap *own_uhr_cap = capa->own_uhr_cap;
        bool has_vht = vht_cap && vht_cap->vht_supported;
        u16 flags = 0;

        /* STBC flags */
        if (mld->cfg->ht_params.stbc &&
            (hweight8(iwl_mld_get_valid_tx_ant(mld)) > 1)) {
                if (he_cap && he_cap->has_he &&
                    he_cap->he_cap_elem.phy_cap_info[2] &
                                IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ)
                        flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
                else if (vht_cap &&
                         vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
                        flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
                else if (ht_cap && ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)
                        flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
        }

        /* LDPC */
        if (mld->cfg->ht_params.ldpc &&
            ((ht_cap && ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING) ||
             (has_vht && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))))
                flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;

        if (he_cap && he_cap->has_he &&
            (he_cap->he_cap_elem.phy_cap_info[1] &
                        IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
                flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;

        if (own_he_cap &&
            !(own_he_cap->he_cap_elem.phy_cap_info[1] &
                        IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
                flags &= ~IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;

        /* DCM */
        if (he_cap && he_cap->has_he &&
            (he_cap->he_cap_elem.phy_cap_info[3] &
             IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK &&
             own_he_cap &&
             own_he_cap->he_cap_elem.phy_cap_info[3] &
                        IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_TX_MASK))
                flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK;

        /* Extra EHT LTF */
        if (own_eht_cap &&
            own_eht_cap->eht_cap_elem.phy_cap_info[5] &
                        IEEE80211_EHT_PHY_CAP5_SUPP_EXTRA_EHT_LTF &&
            eht_cap && eht_cap->has_eht &&
            eht_cap->eht_cap_elem.phy_cap_info[5] &
                        IEEE80211_EHT_PHY_CAP5_SUPP_EXTRA_EHT_LTF) {
                flags |= IWL_TLC_MNG_CFG_FLAGS_EHT_EXTRA_LTF_MSK;
        }

        if (uhr_cap && uhr_cap->has_uhr && own_uhr_cap &&
            uhr_cap->phy.cap & cpu_to_le32(IEEE80211_UHR_PHY_CAP_ELR_RX) &&
            own_uhr_cap->phy.cap & cpu_to_le32(IEEE80211_UHR_PHY_CAP_ELR_TX))
                flags |= IWL_TLC_MNG_CFG_FLAGS_UHR_ELR_1_5_MBPS_MSK |
                         IWL_TLC_MNG_CFG_FLAGS_UHR_ELR_3_MBPS_MSK;

        return cpu_to_le16(flags);
}

static u8 iwl_mld_get_fw_chains(struct iwl_mld *mld)
{
        u8 chains = iwl_mld_get_valid_tx_ant(mld);
        u8 fw_chains = 0;

        if (chains & ANT_A)
                fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK;
        if (chains & ANT_B)
                fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK;

        return fw_chains;
}

static u8 iwl_mld_get_fw_sgi(struct iwl_mld_tlc_sta_capa *capa)
{
        const struct ieee80211_sta_ht_cap *ht_cap = capa->ht_cap;
        const struct ieee80211_sta_vht_cap *vht_cap = capa->vht_cap;
        const struct ieee80211_sta_he_cap *he_cap = capa->he_cap;
        u8 sgi_chwidths = 0;

        /* If the association supports HE, HT/VHT rates will never be used for
         * Tx and therefor there's no need to set the
         * sgi-per-channel-width-support bits
         */
        if (he_cap && he_cap->has_he)
                return 0;

        if (ht_cap && ht_cap->cap & IEEE80211_HT_CAP_SGI_20)
                sgi_chwidths |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ);
        if (ht_cap && ht_cap->cap & IEEE80211_HT_CAP_SGI_40)
                sgi_chwidths |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ);
        if (vht_cap && vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80)
                sgi_chwidths |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ);
        if (vht_cap && vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160)
                sgi_chwidths |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ);

        return sgi_chwidths;
}

static int
iwl_mld_get_highest_fw_mcs(const struct ieee80211_sta_vht_cap *vht_cap,
                           int nss)
{
        u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
                (0x3 << (2 * (nss - 1)));
        rx_mcs >>= (2 * (nss - 1));

        switch (rx_mcs) {
        case IEEE80211_VHT_MCS_SUPPORT_0_7:
                return IWL_TLC_MNG_HT_RATE_MCS7;
        case IEEE80211_VHT_MCS_SUPPORT_0_8:
                return IWL_TLC_MNG_HT_RATE_MCS8;
        case IEEE80211_VHT_MCS_SUPPORT_0_9:
                return IWL_TLC_MNG_HT_RATE_MCS9;
        default:
                WARN_ON_ONCE(1);
                break;
        }

        return 0;
}

static void
iwl_mld_fill_vht_rates(struct iwl_mld_tlc_sta_capa *capa,
                       struct iwl_tlc_config_cmd *cmd)
{
        u32 supp;
        int i, highest_mcs;
        u8 max_nss = capa->rx_nss;
        struct ieee80211_vht_cap ieee_vht_cap = {
                .vht_cap_info = cpu_to_le32(capa->vht_cap->cap),
                .supp_mcs = capa->vht_cap->vht_mcs,
        };

        /* the station support only a single receive chain */
        if (capa->smps_mode == IEEE80211_SMPS_STATIC)
                max_nss = 1;

        for (i = 0; i < max_nss && i < IWL_TLC_NSS_MAX; i++) {
                int nss = i + 1;

                highest_mcs = iwl_mld_get_highest_fw_mcs(capa->vht_cap, nss);
                if (!highest_mcs)
                        continue;

                supp = BIT(highest_mcs + 1) - 1;
                if (capa->bandwidth == IEEE80211_STA_RX_BW_20)
                        supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9);

                cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80] = cpu_to_le32(supp);
                /* Check if VHT extended NSS indicates that the bandwidth/NSS
                 * configuration is supported - only for MCS 0 since we already
                 * decoded the MCS bits anyway ourselves.
                 */
                if (capa->bandwidth == IEEE80211_STA_RX_BW_160 &&
                    ieee80211_get_vht_max_nss(&ieee_vht_cap,
                                              IEEE80211_VHT_CHANWIDTH_160MHZ,
                                              0, true, nss) >= nss)
                        cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_160] =
                                cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80];
        }
}

static u32 iwl_mld_he_mac80211_mcs_to_fw_mcs(u16 mcs)
{
        switch (mcs) {
        case IEEE80211_HE_MCS_SUPPORT_0_7:
                return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1;
        case IEEE80211_HE_MCS_SUPPORT_0_9:
                return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1;
        case IEEE80211_HE_MCS_SUPPORT_0_11:
                return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1;
        case IEEE80211_HE_MCS_NOT_SUPPORTED:
                return 0;
        }

        WARN(1, "invalid HE MCS %d\n", mcs);
        return 0;
}

static void
iwl_mld_fill_he_rates(struct iwl_mld_tlc_sta_capa *capa,
                      struct iwl_tlc_config_cmd *cmd)
{
        const struct ieee80211_sta_he_cap *he_cap = capa->he_cap;
        u16 mcs_160 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
        u16 mcs_80 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
        u16 tx_mcs_80 = le16_to_cpu(capa->own_he_cap->he_mcs_nss_supp.tx_mcs_80);
        u16 tx_mcs_160 = le16_to_cpu(capa->own_he_cap->he_mcs_nss_supp.tx_mcs_160);
        int i;
        u8 nss = capa->rx_nss;

        /* the station support only a single receive chain */
        if (capa->smps_mode == IEEE80211_SMPS_STATIC)
                nss = 1;

        for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
                u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3;
                u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3;
                u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3;
                u16 _tx_mcs_80 = (tx_mcs_80 >> (2 * i)) & 0x3;

                /* If one side doesn't support - mark both as not supporting */
                if (_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
                    _tx_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
                        _mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
                        _tx_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
                }
                if (_mcs_80 > _tx_mcs_80)
                        _mcs_80 = _tx_mcs_80;
                cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80] =
                        cpu_to_le32(iwl_mld_he_mac80211_mcs_to_fw_mcs(_mcs_80));

                /* If one side doesn't support - mark both as not supporting */
                if (_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
                    _tx_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
                        _mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
                        _tx_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
                }
                if (_mcs_160 > _tx_mcs_160)
                        _mcs_160 = _tx_mcs_160;
                cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_160] =
                        cpu_to_le32(iwl_mld_he_mac80211_mcs_to_fw_mcs(_mcs_160));
        }
}

static void iwl_mld_set_eht_mcs(__le32 ht_rates[][3],
                                enum IWL_TLC_MCS_PER_BW bw,
                                u8 max_nss, u32 mcs_msk)
{
        if (max_nss >= 2)
                ht_rates[IWL_TLC_NSS_2][bw] |= cpu_to_le32(mcs_msk);

        if (max_nss >= 1)
                ht_rates[IWL_TLC_NSS_1][bw] |= cpu_to_le32(mcs_msk);
}

static const
struct ieee80211_eht_mcs_nss_supp_bw *
iwl_mld_get_eht_mcs_of_bw(enum IWL_TLC_MCS_PER_BW bw,
                          const struct ieee80211_eht_mcs_nss_supp *eht_mcs)
{
        switch (bw) {
        case IWL_TLC_MCS_PER_BW_80:
                return &eht_mcs->bw._80;
        case IWL_TLC_MCS_PER_BW_160:
                return &eht_mcs->bw._160;
        case IWL_TLC_MCS_PER_BW_320:
                return &eht_mcs->bw._320;
        default:
                return NULL;
        }
}

static u8 iwl_mld_get_eht_max_nss(u8 rx_nss, u8 tx_nss)
{
        u8 tx = u8_get_bits(tx_nss, IEEE80211_EHT_MCS_NSS_TX);
        u8 rx = u8_get_bits(rx_nss, IEEE80211_EHT_MCS_NSS_RX);
        /* the max nss that can be used,
         * is the min with our tx capa and the peer rx capa.
         */
        return min(tx, rx);
}

#define MAX_NSS_MCS(mcs_num, rx, tx) \
        iwl_mld_get_eht_max_nss((rx)->rx_tx_mcs ##mcs_num## _max_nss, \
                                (tx)->rx_tx_mcs ##mcs_num## _max_nss)

static void
iwl_mld_fill_eht_rates(struct ieee80211_vif *vif,
                       struct iwl_mld_tlc_sta_capa *capa,
                       struct iwl_tlc_config_cmd *cmd)
{
        /* peer RX mcs capa */
        const struct ieee80211_eht_mcs_nss_supp *eht_rx_mcs =
                &capa->eht_cap->eht_mcs_nss_supp;
        /* our TX mcs capa */
        const struct ieee80211_eht_mcs_nss_supp *eht_tx_mcs =
                &capa->own_eht_cap->eht_mcs_nss_supp;

        enum IWL_TLC_MCS_PER_BW bw;
        struct ieee80211_eht_mcs_nss_supp_20mhz_only mcs_rx_20;
        struct ieee80211_eht_mcs_nss_supp_20mhz_only mcs_tx_20;

        /* peer is 20 MHz only */
        if (vif->type == NL80211_IFTYPE_AP &&
            !(capa->he_cap->he_cap_elem.phy_cap_info[0] &
              IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) {
                mcs_rx_20 = eht_rx_mcs->only_20mhz;
        } else {
                mcs_rx_20.rx_tx_mcs7_max_nss =
                        eht_rx_mcs->bw._80.rx_tx_mcs9_max_nss;
                mcs_rx_20.rx_tx_mcs9_max_nss =
                        eht_rx_mcs->bw._80.rx_tx_mcs9_max_nss;
                mcs_rx_20.rx_tx_mcs11_max_nss =
                        eht_rx_mcs->bw._80.rx_tx_mcs11_max_nss;
                mcs_rx_20.rx_tx_mcs13_max_nss =
                        eht_rx_mcs->bw._80.rx_tx_mcs13_max_nss;
        }

        /* NIC is capable of 20 MHz only */
        if (!(capa->own_he_cap->he_cap_elem.phy_cap_info[0] &
              IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) {
                mcs_tx_20 = eht_tx_mcs->only_20mhz;
        } else {
                mcs_tx_20.rx_tx_mcs7_max_nss =
                        eht_tx_mcs->bw._80.rx_tx_mcs9_max_nss;
                mcs_tx_20.rx_tx_mcs9_max_nss =
                        eht_tx_mcs->bw._80.rx_tx_mcs9_max_nss;
                mcs_tx_20.rx_tx_mcs11_max_nss =
                        eht_tx_mcs->bw._80.rx_tx_mcs11_max_nss;
                mcs_tx_20.rx_tx_mcs13_max_nss =
                        eht_tx_mcs->bw._80.rx_tx_mcs13_max_nss;
        }

        /* rates for 20/40/80 MHz */
        bw = IWL_TLC_MCS_PER_BW_80;
        iwl_mld_set_eht_mcs(cmd->ht_rates, bw,
                            MAX_NSS_MCS(7, &mcs_rx_20, &mcs_tx_20),
                            GENMASK(7, 0));
        iwl_mld_set_eht_mcs(cmd->ht_rates, bw,
                            MAX_NSS_MCS(9, &mcs_rx_20, &mcs_tx_20),
                            GENMASK(9, 8));
        iwl_mld_set_eht_mcs(cmd->ht_rates, bw,
                            MAX_NSS_MCS(11, &mcs_rx_20, &mcs_tx_20),
                            GENMASK(11, 10));
        iwl_mld_set_eht_mcs(cmd->ht_rates, bw,
                            MAX_NSS_MCS(13, &mcs_rx_20, &mcs_tx_20),
                            GENMASK(13, 12));

        /* rates for 160/320 MHz */
        for (bw = IWL_TLC_MCS_PER_BW_160; bw <= IWL_TLC_MCS_PER_BW_320; bw++) {
                const struct ieee80211_eht_mcs_nss_supp_bw *mcs_rx =
                        iwl_mld_get_eht_mcs_of_bw(bw, eht_rx_mcs);
                const struct ieee80211_eht_mcs_nss_supp_bw *mcs_tx =
                        iwl_mld_get_eht_mcs_of_bw(bw, eht_tx_mcs);

                /* got unsupported index for bw */
                if (!mcs_rx || !mcs_tx)
                        continue;

                /* break out if we don't support the bandwidth */
                if (cmd->max_ch_width < (bw + IWL_TLC_MNG_CH_WIDTH_80MHZ))
                        break;

                iwl_mld_set_eht_mcs(cmd->ht_rates, bw,
                                    MAX_NSS_MCS(9, mcs_rx, mcs_tx),
                                    GENMASK(9, 0));
                iwl_mld_set_eht_mcs(cmd->ht_rates, bw,
                                    MAX_NSS_MCS(11, mcs_rx, mcs_tx),
                                    GENMASK(11, 10));
                iwl_mld_set_eht_mcs(cmd->ht_rates, bw,
                                    MAX_NSS_MCS(13, mcs_rx, mcs_tx),
                                    GENMASK(13, 12));
        }

        /* the station support only a single receive chain */
        if (capa->smps_mode == IEEE80211_SMPS_STATIC ||
            capa->rx_nss < 2)
                memset(cmd->ht_rates[IWL_TLC_NSS_2], 0,
                       sizeof(cmd->ht_rates[IWL_TLC_NSS_2]));
}

static void
iwl_mld_fill_supp_rates(struct iwl_mld *mld,
                        struct ieee80211_vif *vif,
                        struct iwl_mld_tlc_sta_capa *capa,
                        struct iwl_tlc_config_cmd *cmd)
{
        cmd->non_ht_rates = cpu_to_le16(capa->non_ht_rates);
        cmd->mode = IWL_TLC_MNG_MODE_NON_HT;

        if (capa->uhr_cap && capa->uhr_cap->has_uhr && capa->own_uhr_cap) {
                cmd->mode = IWL_TLC_MNG_MODE_UHR;
                /*
                 * FIXME: spec currently inherits from EHT but has no
                 * finer MCS bits. Once that's there, need to add them
                 * to the bitmaps (and maybe copy this to UHR, or so.)
                 */
                iwl_mld_fill_eht_rates(vif, capa, cmd);
        } else if (capa->eht_cap && capa->eht_cap->has_eht &&
                   capa->own_he_cap && capa->own_eht_cap) {
                cmd->mode = IWL_TLC_MNG_MODE_EHT;
                iwl_mld_fill_eht_rates(vif, capa, cmd);
        } else if (capa->he_cap && capa->he_cap->has_he && capa->own_he_cap) {
                cmd->mode = IWL_TLC_MNG_MODE_HE;
                iwl_mld_fill_he_rates(capa, cmd);
        } else if (capa->vht_cap && capa->vht_cap->vht_supported) {
                cmd->mode = IWL_TLC_MNG_MODE_VHT;
                iwl_mld_fill_vht_rates(capa, cmd);
        } else if (capa->ht_cap && capa->ht_cap->ht_supported) {
                cmd->mode = IWL_TLC_MNG_MODE_HT;
                cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_MCS_PER_BW_80] =
                        cpu_to_le32(capa->ht_cap->mcs.rx_mask[0]);

                /* the station support only a single receive chain */
                if (capa->smps_mode == IEEE80211_SMPS_STATIC)
                        cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_MCS_PER_BW_80] =
                                0;
                else
                        cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_MCS_PER_BW_80] =
                                cpu_to_le32(capa->ht_cap->mcs.rx_mask[1]);
        }
}

static void iwl_mld_send_tlc_cmd(struct iwl_mld *mld,
                                 struct ieee80211_vif *vif,
                                 struct iwl_mld_sta *mld_sta,
                                 int fw_sta_mask, int phy_id,
                                 struct iwl_mld_tlc_sta_capa *capa)
{
        struct iwl_tlc_config_cmd cmd = {
                /* For AP mode, use 20 MHz until the STA is authorized */
                .max_ch_width = mld_sta->sta_state > IEEE80211_STA_ASSOC ?
                        iwl_mld_fw_bw_from_sta_bw(capa->bandwidth) :
                        IWL_TLC_MNG_CH_WIDTH_20MHZ,
                .flags = iwl_mld_get_tlc_cmd_flags(mld, capa),
                .chains = iwl_mld_get_fw_chains(mld),
                .sgi_ch_width_supp = iwl_mld_get_fw_sgi(capa),
                .max_mpdu_len = cpu_to_le16(capa->max_amsdu_len),
        };
        u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, TLC_MNG_CONFIG_CMD);
        u8 cmd_ver = iwl_fw_lookup_cmd_ver(mld->fw, cmd_id, 0);
        void *cmd_ptr;
        u8 cmd_size;
        int ret;

        cmd.sta_mask = cpu_to_le32(fw_sta_mask);
        cmd.phy_id = cpu_to_le32(phy_id);

        iwl_mld_fill_supp_rates(mld, vif, capa, &cmd);

        if (cmd_ver == 6) {
                cmd_ptr = &cmd;
                cmd_size = sizeof(cmd);
        } else {
                IWL_ERR(mld, "Unsupported TLC config cmd version %d\n",
                        cmd_ver);
                return;
        }

        IWL_DEBUG_RATE(mld,
                       "TLC CONFIG CMD, sta_mask=0x%x, max_ch_width=%d, mode=%d, phy_id=%d\n",
                       le32_to_cpu(cmd.sta_mask), cmd.max_ch_width, cmd.mode,
                       le32_to_cpu(cmd.phy_id));

        /* Send async since this can be called within a RCU-read section */
        ret = iwl_mld_send_cmd_with_flags_pdu(mld, cmd_id, CMD_ASYNC, cmd_ptr,
                                              cmd_size);
        if (ret)
                IWL_ERR(mld, "Failed to send TLC cmd (%d)\n", ret);
}

int iwl_mld_send_tlc_dhc(struct iwl_mld *mld, u8 sta_id, u32 type, u32 data)
{
        struct {
                struct iwl_dhc_cmd dhc;
                struct iwl_dhc_tlc_cmd tlc;
        } __packed cmd = {
                .tlc.sta_id = sta_id,
                .tlc.type = cpu_to_le32(type),
                .tlc.data[0] = cpu_to_le32(data),
                .dhc.length = cpu_to_le32(sizeof(cmd.tlc) >> 2),
                .dhc.index_and_mask =
                        cpu_to_le32(DHC_TABLE_INTEGRATION | DHC_TARGET_UMAC |
                                    DHC_INTEGRATION_TLC_DEBUG_CONFIG),
        };
        int ret;

        ret = iwl_mld_send_cmd_with_flags_pdu(mld,
                                              WIDE_ID(IWL_ALWAYS_LONG_GROUP,
                                                      DEBUG_HOST_COMMAND),
                                              CMD_ASYNC, &cmd);
        IWL_DEBUG_RATE(mld, "sta_id %d, type: 0x%X, value: 0x%X, ret%d\n",
                       sta_id, type, data, ret);
        return ret;
}

static void _iwl_mld_config_tlc_link(struct iwl_mld *mld,
                                     struct ieee80211_vif *vif,
                                     struct ieee80211_chanctx_conf *chan_ctx,
                                     u32 fw_sta_mask,
                                     struct ieee80211_link_sta *link_sta,
                                     struct iwl_mld_tlc_sta_capa *capa)
{
        struct iwl_mld_sta *mld_sta = iwl_mld_sta_from_mac80211(link_sta->sta);
        struct ieee80211_supported_band *sband;
        unsigned long rates_bitmap;
        enum nl80211_band band;
        int i;

        /*
         * Note: Due to NAN, the chan_ctx here might not be the same as the
         * vif->links[link_sta->link_id] one (which is NULL in NAN), so some
         * care is needed in this function (and the 'capa' exists to make it
         * less error-prone, the other functions need not worry about it.)
         */

        if (WARN_ON(!chan_ctx))
                return;

        band = chan_ctx->def.chan->band;
        sband = mld->hw->wiphy->bands[band];

        /* Before we have information about a station, configure the A-MSDU RC
         * limit such that iwlmd and mac80211 would not be allowed to build
         * A-MSDUs.
         */
        if (mld_sta->sta_state < IEEE80211_STA_ASSOC) {
                link_sta->agg.max_rc_amsdu_len = 1;
                ieee80211_sta_recalc_aggregates(link_sta->sta);
        }

        /* non HT rates */
        rates_bitmap = link_sta->supp_rates[sband->band];
        for_each_set_bit(i, &rates_bitmap, BITS_PER_LONG)
                capa->non_ht_rates |= BIT(sband->bitrates[i].hw_value);

        capa->max_amsdu_len = link_sta->agg.max_amsdu_len;
        capa->ht_cap = &link_sta->ht_cap;
        capa->vht_cap = &link_sta->vht_cap;
        capa->he_cap = &link_sta->he_cap;
        capa->eht_cap = &link_sta->eht_cap;
        capa->uhr_cap = &link_sta->uhr_cap;

        iwl_mld_send_tlc_cmd(mld, vif, mld_sta, fw_sta_mask,
                             iwl_mld_phy_from_mac80211(chan_ctx)->fw_id,
                             capa);
}

void iwl_mld_tlc_update_phy(struct iwl_mld *mld, struct ieee80211_vif *vif,
                            struct ieee80211_bss_conf *link_conf)
{
        struct iwl_mld_link *mld_link = iwl_mld_link_from_mac80211(link_conf);
        struct ieee80211_chanctx_conf *chan_ctx;
        int link_id = link_conf->link_id;
        struct ieee80211_sta *sta;

        lockdep_assert_wiphy(mld->wiphy);

        if (WARN_ON(!mld_link))
                return;

        chan_ctx = rcu_dereference_wiphy(mld->wiphy, mld_link->chan_ctx);

        for_each_station(sta, mld->hw) {
                struct iwl_mld_sta *mld_sta = iwl_mld_sta_from_mac80211(sta);
                struct iwl_mld_link_sta *mld_link_sta;
                struct ieee80211_link_sta *link_sta;

                if (mld_sta->vif != vif)
                        continue;

                link_sta = link_sta_dereference_protected(sta, link_id);
                if (!link_sta)
                        continue;

                mld_link_sta = iwl_mld_link_sta_dereference_check(mld_sta,
                                                                  link_id);

                /* In recovery flow, the station may not be (yet) in the
                 * firmware, don't send a TLC command for a station the
                 * firmware does not know.
                 */
                if (!mld_link_sta || !mld_link_sta->in_fw)
                        continue;

                if (chan_ctx)
                        iwl_mld_config_tlc_link(mld, vif, link_conf, link_sta);
                /* TODO: else, remove the TLC object in the firmware */
        }
}

static void iwl_mld_config_tlc_nan(struct iwl_mld *mld,
                                   struct ieee80211_vif *vif,
                                   struct ieee80211_link_sta *link_sta,
                                   int fw_sta_id)
{
        struct ieee80211_nan_peer_sched *sched;
        struct iwl_mld_nan_link *nan_link;
        struct ieee80211_sta *nmi, *iter;
        struct iwl_mld_vif *nan_mld_vif;
        u32 fw_sta_mask;

        nmi = wiphy_dereference(mld->wiphy, link_sta->sta->nmi);
        if (WARN_ON(!nmi))
                return;

        sched = nmi->nan_sched;

        /* This sta might not be in the list yet as it is just getting added */
        fw_sta_mask = BIT(fw_sta_id);
        for_each_station(iter, mld->hw) {
                struct iwl_mld_sta *mld_sta = iwl_mld_sta_from_mac80211(iter);
                struct ieee80211_sta *iter_nmi;

                iter_nmi = wiphy_dereference(mld->wiphy, iter->nmi);

                if (iter_nmi == nmi)
                        fw_sta_mask |= BIT(mld_sta->deflink.fw_id);
        }

        if (WARN_ON(!mld->nan_device_vif))
                return;

        nan_mld_vif = iwl_mld_vif_from_mac80211(mld->nan_device_vif);

        for_each_mld_nan_valid_link(nan_mld_vif, nan_link) {
                struct ieee80211_chanctx_conf *chan_ctx;
                struct iwl_mld_tlc_sta_capa capa = {};
                struct cfg80211_chan_def *chandef;
                bool common_channel = false;

                chan_ctx = nan_link->chanctx;
                if (!chan_ctx)
                        continue;

                chandef = iwl_mld_get_chandef_from_chanctx(mld, chan_ctx);

                capa.smps_mode = IEEE80211_SMPS_OFF; /* always off */

                capa.rx_nss = 2; /* maximum we support */
                capa.bandwidth = ieee80211_chan_width_to_rx_bw(chandef->width);

                for (int j = 0; j < (sched ? sched->n_channels : 0); j++) {
                        enum ieee80211_sta_rx_bandwidth rx_bw;
                        enum nl80211_chan_width width;
                        int chains;

                        if (sched->channels[j].chanctx_conf != chan_ctx)
                                continue;

                        common_channel = true;

                        width = sched->channels[j].chanreq.oper.width;
                        rx_bw = ieee80211_chan_width_to_rx_bw(width);
                        capa.bandwidth = min(capa.bandwidth, rx_bw);

                        chains = sched->channels[j].needed_rx_chains;
                        capa.rx_nss = min(capa.rx_nss, chains);
                }

                /* Apply minimum parameters if there is no common channel */
                if (!common_channel) {
                        capa.bandwidth = IEEE80211_STA_RX_BW_20;
                        capa.rx_nss = 1;
                }

                capa.own_he_cap = &mld->wiphy->nan_capa.phy.he;
                /* no EHT/UHR for NAN */

                _iwl_mld_config_tlc_link(mld, vif, chan_ctx, fw_sta_mask,
                                         link_sta, &capa);
        }
}

void iwl_mld_config_tlc_link(struct iwl_mld *mld,
                             struct ieee80211_vif *vif,
                             struct ieee80211_bss_conf *link_conf,
                             struct ieee80211_link_sta *link_sta)
{
        struct iwl_mld_link *mld_link = iwl_mld_link_from_mac80211(link_conf);
        int fw_sta_id = iwl_mld_fw_sta_id_from_link_sta(mld, link_sta);
        struct ieee80211_chanctx_conf *chan_ctx;
        struct ieee80211_supported_band *sband;
        struct iwl_mld_tlc_sta_capa capa = {};
        struct cfg80211_chan_def *chandef;
        enum nl80211_band band;

        if (fw_sta_id < 0)
                return;

        if (vif->type == NL80211_IFTYPE_NAN)
                return;

        if (vif->type == NL80211_IFTYPE_NAN_DATA) {
                iwl_mld_config_tlc_nan(mld, vif, link_sta, fw_sta_id);
                return;
        }

        if (WARN_ON_ONCE(!mld_link))
                return;

        chan_ctx = rcu_dereference_wiphy(mld->wiphy, mld_link->chan_ctx);
        if (WARN_ON_ONCE(!chan_ctx))
                return;

        chandef = &iwl_mld_phy_from_mac80211(chan_ctx)->chandef;
        band = chandef->chan->band;
        sband = mld->hw->wiphy->bands[band];

        capa.smps_mode = link_sta->smps_mode;
        capa.rx_nss = link_sta->rx_nss;
        capa.bandwidth = ieee80211_chan_width_to_rx_bw(chandef->width);
        capa.bandwidth = min(capa.bandwidth, link_sta->bandwidth);
        capa.own_he_cap = ieee80211_get_he_iftype_cap_vif(sband, vif);
        capa.own_eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, vif);
        capa.own_uhr_cap = ieee80211_get_uhr_iftype_cap_vif(sband, vif);

        _iwl_mld_config_tlc_link(mld, vif, chan_ctx, BIT(fw_sta_id),
                                 link_sta, &capa);
}

void iwl_mld_config_tlc(struct iwl_mld *mld, struct ieee80211_vif *vif,
                        struct ieee80211_sta *sta)
{
        struct ieee80211_bss_conf *link;
        int link_id;

        lockdep_assert_wiphy(mld->wiphy);

        /* Note: for NAN this is only the mac80211-level deflink */
        for_each_vif_active_link(vif, link, link_id) {
                struct ieee80211_link_sta *link_sta =
                        link_sta_dereference_check(sta, link_id);

                if (!link || !link_sta)
                        continue;

                iwl_mld_config_tlc_link(mld, vif, link, link_sta);
        }
}

static u16
iwl_mld_get_amsdu_size_of_tid(struct iwl_mld *mld,
                              struct ieee80211_link_sta *link_sta,
                              unsigned int tid)
{
        struct ieee80211_sta *sta = link_sta->sta;
        struct ieee80211_vif *vif = iwl_mld_sta_from_mac80211(sta)->vif;
        const u8 tid_to_mac80211_ac[] = {
                IEEE80211_AC_BE,
                IEEE80211_AC_BK,
                IEEE80211_AC_BK,
                IEEE80211_AC_BE,
                IEEE80211_AC_VI,
                IEEE80211_AC_VI,
                IEEE80211_AC_VO,
                IEEE80211_AC_VO,
        };
        unsigned int result = link_sta->agg.max_rc_amsdu_len;
        u8 ac, txf, lmac;

        lockdep_assert_wiphy(mld->wiphy);

        /* Don't send an AMSDU that will be longer than the TXF.
         * Add a security margin of 256 for the TX command + headers.
         * We also want to have the start of the next packet inside the
         * fifo to be able to send bursts.
         */

        if (WARN_ON(tid >= ARRAY_SIZE(tid_to_mac80211_ac)))
                return 0;

        ac = tid_to_mac80211_ac[tid];

        /* For HE redirect to trigger based fifos */
        if (link_sta->he_cap.has_he)
                ac += 4;

        txf = iwl_mld_mac80211_ac_to_fw_tx_fifo(ac);

        /* Only one link: take the lmac according to the band */
        if (hweight16(sta->valid_links) <= 1) {
                enum nl80211_band band;
                struct ieee80211_bss_conf *link =
                        wiphy_dereference(mld->wiphy,
                                          vif->link_conf[link_sta->link_id]);

                if (WARN_ON(!link || !link->chanreq.oper.chan))
                        band = NL80211_BAND_2GHZ;
                else
                        band = link->chanreq.oper.chan->band;
                lmac = iwl_mld_get_lmac_id(mld, band);

        /* More than one link but with 2 lmacs: take the minimum */
        } else if (fw_has_capa(&mld->fw->ucode_capa,
                               IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
                lmac = IWL_LMAC_5G_INDEX;
                result = min_t(unsigned int, result,
                               mld->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
                lmac = IWL_LMAC_24G_INDEX;
        /* More than one link but only one lmac */
        } else {
                lmac = IWL_LMAC_24G_INDEX;
        }

        return min_t(unsigned int, result,
                     mld->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
}

void iwl_mld_handle_tlc_notif(struct iwl_mld *mld,
                              struct iwl_rx_packet *pkt)
{
        struct iwl_tlc_update_notif *notif = (void *)pkt->data;
        struct ieee80211_link_sta *link_sta;
        u32 flags = le32_to_cpu(notif->flags);
        u32 enabled;
        u16 size;

        if (IWL_FW_CHECK(mld, notif->sta_id >= mld->fw->ucode_capa.num_stations,
                         "Invalid sta id (%d) in TLC notification\n",
                         notif->sta_id))
                return;

        link_sta = wiphy_dereference(mld->wiphy,
                                     mld->fw_id_to_link_sta[notif->sta_id]);

        if (WARN(IS_ERR_OR_NULL(link_sta),
                 "link_sta of sta id (%d) doesn't exist\n", notif->sta_id))
                return;

        if (flags & IWL_TLC_NOTIF_FLAG_RATE) {
                struct iwl_mld_link_sta *mld_link_sta =
                        iwl_mld_link_sta_from_mac80211(link_sta);
                char pretty_rate[100];

                if (WARN_ON(!mld_link_sta))
                        return;

                mld_link_sta->last_rate_n_flags = le32_to_cpu(notif->rate);

                rs_pretty_print_rate(pretty_rate, sizeof(pretty_rate),
                                     mld_link_sta->last_rate_n_flags);
                IWL_DEBUG_RATE(mld, "TLC notif: new rate = %s\n", pretty_rate);
        }

        /* We are done processing the notif */
        if (!(flags & IWL_TLC_NOTIF_FLAG_AMSDU))
                return;

        enabled = le32_to_cpu(notif->amsdu_enabled);
        size = le32_to_cpu(notif->amsdu_size);

        if (size < 2000) {
                size = 0;
                enabled = 0;
        }

        if (IWL_FW_CHECK(mld, size > link_sta->agg.max_amsdu_len,
                         "Invalid AMSDU len in TLC notif: %d (Max AMSDU len: %d)\n",
                         size, link_sta->agg.max_amsdu_len))
                return;

        link_sta->agg.max_rc_amsdu_len = size;

        for (int i = 0; i < IWL_MAX_TID_COUNT; i++) {
                if (enabled & BIT(i))
                        link_sta->agg.max_tid_amsdu_len[i] =
                                iwl_mld_get_amsdu_size_of_tid(mld, link_sta, i);
                else
                        link_sta->agg.max_tid_amsdu_len[i] = 1;
        }

        ieee80211_sta_recalc_aggregates(link_sta->sta);

        IWL_DEBUG_RATE(mld,
                       "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n",
                       le32_to_cpu(notif->amsdu_size), size, enabled);
}