/*
 * Marvell Wireless LAN device driver: CFG80211
 *
 * Copyright (C) 2011, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include "cfg80211.h"
#include "main.h"

static char *reg_alpha2;
module_param(reg_alpha2, charp, 0);

static const struct ieee80211_iface_limit mwifiex_ap_sta_limits[] = {
        {
                .max = 2, .types = BIT(NL80211_IFTYPE_STATION) |
                                   BIT(NL80211_IFTYPE_P2P_GO) |
                                   BIT(NL80211_IFTYPE_P2P_CLIENT),
        },
        {
                .max = 1, .types = BIT(NL80211_IFTYPE_AP),
        },
};

static const struct ieee80211_iface_combination mwifiex_iface_comb_ap_sta = {
        .limits = mwifiex_ap_sta_limits,
        .num_different_channels = 1,
        .n_limits = ARRAY_SIZE(mwifiex_ap_sta_limits),
        .max_interfaces = MWIFIEX_MAX_BSS_NUM,
        .beacon_int_infra_match = true,
};

static const struct ieee80211_regdomain mwifiex_world_regdom_custom = {
        .n_reg_rules = 7,
        .alpha2 =  "99",
        .reg_rules = {
                /* Channel 1 - 11 */
                REG_RULE(2412-10, 2462+10, 40, 3, 20, 0),
                /* Channel 12 - 13 */
                REG_RULE(2467-10, 2472+10, 20, 3, 20,
                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
                /* Channel 14 */
                REG_RULE(2484-10, 2484+10, 20, 3, 20,
                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS |
                         NL80211_RRF_NO_OFDM),
                /* Channel 36 - 48 */
                REG_RULE(5180-10, 5240+10, 40, 3, 20,
                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
                /* Channel 149 - 165 */
                REG_RULE(5745-10, 5825+10, 40, 3, 20,
                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
                /* Channel 52 - 64 */
                REG_RULE(5260-10, 5320+10, 40, 3, 30,
                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS |
                         NL80211_RRF_DFS),
                /* Channel 100 - 140 */
                REG_RULE(5500-10, 5700+10, 40, 3, 30,
                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS |
                         NL80211_RRF_DFS),
        }
};

/*
 * This function maps the nl802.11 channel type into driver channel type.
 *
 * The mapping is as follows -
 *      NL80211_CHAN_NO_HT     -> IEEE80211_HT_PARAM_CHA_SEC_NONE
 *      NL80211_CHAN_HT20      -> IEEE80211_HT_PARAM_CHA_SEC_NONE
 *      NL80211_CHAN_HT40PLUS  -> IEEE80211_HT_PARAM_CHA_SEC_ABOVE
 *      NL80211_CHAN_HT40MINUS -> IEEE80211_HT_PARAM_CHA_SEC_BELOW
 *      Others                 -> IEEE80211_HT_PARAM_CHA_SEC_NONE
 */
u8 mwifiex_chan_type_to_sec_chan_offset(enum nl80211_channel_type chan_type)
{
        switch (chan_type) {
        case NL80211_CHAN_NO_HT:
        case NL80211_CHAN_HT20:
                return IEEE80211_HT_PARAM_CHA_SEC_NONE;
        case NL80211_CHAN_HT40PLUS:
                return IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
        case NL80211_CHAN_HT40MINUS:
                return IEEE80211_HT_PARAM_CHA_SEC_BELOW;
        default:
                return IEEE80211_HT_PARAM_CHA_SEC_NONE;
        }
}

/*
 * This function checks whether WEP is set.
 */
static int
mwifiex_is_alg_wep(u32 cipher)
{
        switch (cipher) {
        case WLAN_CIPHER_SUITE_WEP40:
        case WLAN_CIPHER_SUITE_WEP104:
                return 1;
        default:
                break;
        }

        return 0;
}

/*
 * This function retrieves the private structure from kernel wiphy structure.
 */
static void *mwifiex_cfg80211_get_adapter(struct wiphy *wiphy)
{
        return (void *) (*(unsigned long *) wiphy_priv(wiphy));
}

/*
 * CFG802.11 operation handler to delete a network key.
 */
static int
mwifiex_cfg80211_del_key(struct wiphy *wiphy, struct net_device *netdev,
                         u8 key_index, bool pairwise, const u8 *mac_addr)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(netdev);
        const u8 bc_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
        const u8 *peer_mac = pairwise ? mac_addr : bc_mac;

        if (mwifiex_set_encode(priv, NULL, NULL, 0, key_index, peer_mac, 1)) {
                wiphy_err(wiphy, "deleting the crypto keys\n");
                return -EFAULT;
        }

        wiphy_dbg(wiphy, "info: crypto keys deleted\n");
        return 0;
}

/*
 * This function forms an skb for management frame.
 */
static int
mwifiex_form_mgmt_frame(struct sk_buff *skb, const u8 *buf, size_t len)
{
        u8 addr[ETH_ALEN] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
        u16 pkt_len;
        u32 tx_control = 0, pkt_type = PKT_TYPE_MGMT;
        struct timeval tv;

        pkt_len = len + ETH_ALEN;

        skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN +
                    MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(pkt_len));
        memcpy(skb_push(skb, sizeof(pkt_len)), &pkt_len, sizeof(pkt_len));

        memcpy(skb_push(skb, sizeof(tx_control)),
               &tx_control, sizeof(tx_control));

        memcpy(skb_push(skb, sizeof(pkt_type)), &pkt_type, sizeof(pkt_type));

        /* Add packet data and address4 */
        memcpy(skb_put(skb, sizeof(struct ieee80211_hdr_3addr)), buf,
               sizeof(struct ieee80211_hdr_3addr));
        memcpy(skb_put(skb, ETH_ALEN), addr, ETH_ALEN);
        memcpy(skb_put(skb, len - sizeof(struct ieee80211_hdr_3addr)),
               buf + sizeof(struct ieee80211_hdr_3addr),
               len - sizeof(struct ieee80211_hdr_3addr));

        skb->priority = LOW_PRIO_TID;
        do_gettimeofday(&tv);
        skb->tstamp = timeval_to_ktime(tv);

        return 0;
}

/*
 * CFG802.11 operation handler to transmit a management frame.
 */
static int
mwifiex_cfg80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
                         struct ieee80211_channel *chan, bool offchan,
                         unsigned int wait, const u8 *buf, size_t len,
                         bool no_cck, bool dont_wait_for_ack, u64 *cookie)
{
        struct sk_buff *skb;
        u16 pkt_len;
        const struct ieee80211_mgmt *mgmt;
        struct mwifiex_txinfo *tx_info;
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(wdev->netdev);

        if (!buf || !len) {
                wiphy_err(wiphy, "invalid buffer and length\n");
                return -EFAULT;
        }

        mgmt = (const struct ieee80211_mgmt *)buf;
        if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_STA &&
            ieee80211_is_probe_resp(mgmt->frame_control)) {
                /* Since we support offload probe resp, we need to skip probe
                 * resp in AP or GO mode */
                wiphy_dbg(wiphy,
                          "info: skip to send probe resp in AP or GO mode\n");
                return 0;
        }

        pkt_len = len + ETH_ALEN;
        skb = dev_alloc_skb(MWIFIEX_MIN_DATA_HEADER_LEN +
                            MWIFIEX_MGMT_FRAME_HEADER_SIZE +
                            pkt_len + sizeof(pkt_len));

        if (!skb) {
                wiphy_err(wiphy, "allocate skb failed for management frame\n");
                return -ENOMEM;
        }

        tx_info = MWIFIEX_SKB_TXCB(skb);
        tx_info->bss_num = priv->bss_num;
        tx_info->bss_type = priv->bss_type;

        mwifiex_form_mgmt_frame(skb, buf, len);
        mwifiex_queue_tx_pkt(priv, skb);

        *cookie = prandom_u32() | 1;
        cfg80211_mgmt_tx_status(wdev, *cookie, buf, len, true, GFP_ATOMIC);

        wiphy_dbg(wiphy, "info: management frame transmitted\n");
        return 0;
}

/*
 * CFG802.11 operation handler to register a mgmt frame.
 */
static void
mwifiex_cfg80211_mgmt_frame_register(struct wiphy *wiphy,
                                     struct wireless_dev *wdev,
                                     u16 frame_type, bool reg)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(wdev->netdev);
        u32 mask;

        if (reg)
                mask = priv->mgmt_frame_mask | BIT(frame_type >> 4);
        else
                mask = priv->mgmt_frame_mask & ~BIT(frame_type >> 4);

        if (mask != priv->mgmt_frame_mask) {
                priv->mgmt_frame_mask = mask;
                mwifiex_send_cmd_async(priv, HostCmd_CMD_MGMT_FRAME_REG,
                                       HostCmd_ACT_GEN_SET, 0,
                                       &priv->mgmt_frame_mask);
                wiphy_dbg(wiphy, "info: mgmt frame registered\n");
        }
}

/*
 * CFG802.11 operation handler to remain on channel.
 */
static int
mwifiex_cfg80211_remain_on_channel(struct wiphy *wiphy,
                                   struct wireless_dev *wdev,
                                   struct ieee80211_channel *chan,
                                   unsigned int duration, u64 *cookie)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(wdev->netdev);
        int ret;

        if (!chan || !cookie) {
                wiphy_err(wiphy, "Invalid parameter for ROC\n");
                return -EINVAL;
        }

        if (priv->roc_cfg.cookie) {
                wiphy_dbg(wiphy, "info: ongoing ROC, cookie = 0x%llu\n",
                          priv->roc_cfg.cookie);
                return -EBUSY;
        }

        ret = mwifiex_remain_on_chan_cfg(priv, HostCmd_ACT_GEN_SET, chan,
                                         duration);

        if (!ret) {
                *cookie = prandom_u32() | 1;
                priv->roc_cfg.cookie = *cookie;
                priv->roc_cfg.chan = *chan;

                cfg80211_ready_on_channel(wdev, *cookie, chan,
                                          duration, GFP_ATOMIC);

                wiphy_dbg(wiphy, "info: ROC, cookie = 0x%llx\n", *cookie);
        }

        return ret;
}

/*
 * CFG802.11 operation handler to cancel remain on channel.
 */
static int
mwifiex_cfg80211_cancel_remain_on_channel(struct wiphy *wiphy,
                                          struct wireless_dev *wdev, u64 cookie)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(wdev->netdev);
        int ret;

        if (cookie != priv->roc_cfg.cookie)
                return -ENOENT;

        ret = mwifiex_remain_on_chan_cfg(priv, HostCmd_ACT_GEN_REMOVE,
                                         &priv->roc_cfg.chan, 0);

        if (!ret) {
                cfg80211_remain_on_channel_expired(wdev, cookie,
                                                   &priv->roc_cfg.chan,
                                                   GFP_ATOMIC);

                memset(&priv->roc_cfg, 0, sizeof(struct mwifiex_roc_cfg));

                wiphy_dbg(wiphy, "info: cancel ROC, cookie = 0x%llx\n", cookie);
        }

        return ret;
}

/*
 * CFG802.11 operation handler to set Tx power.
 */
static int
mwifiex_cfg80211_set_tx_power(struct wiphy *wiphy,
                              struct wireless_dev *wdev,
                              enum nl80211_tx_power_setting type,
                              int mbm)
{
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);
        struct mwifiex_private *priv;
        struct mwifiex_power_cfg power_cfg;
        int dbm = MBM_TO_DBM(mbm);

        if (type == NL80211_TX_POWER_FIXED) {
                power_cfg.is_power_auto = 0;
                power_cfg.power_level = dbm;
        } else {
                power_cfg.is_power_auto = 1;
        }

        priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);

        return mwifiex_set_tx_power(priv, &power_cfg);
}

/*
 * CFG802.11 operation handler to set Power Save option.
 *
 * The timeout value, if provided, is currently ignored.
 */
static int
mwifiex_cfg80211_set_power_mgmt(struct wiphy *wiphy,
                                struct net_device *dev,
                                bool enabled, int timeout)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
        u32 ps_mode;

        if (timeout)
                wiphy_dbg(wiphy,
                          "info: ignore timeout value for IEEE Power Save\n");

        ps_mode = enabled;

        return mwifiex_drv_set_power(priv, &ps_mode);
}

/*
 * CFG802.11 operation handler to set the default network key.
 */
static int
mwifiex_cfg80211_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
                                 u8 key_index, bool unicast,
                                 bool multicast)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(netdev);

        /* Return if WEP key not configured */
        if (!priv->sec_info.wep_enabled)
                return 0;

        if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP) {
                priv->wep_key_curr_index = key_index;
        } else if (mwifiex_set_encode(priv, NULL, NULL, 0, key_index,
                                      NULL, 0)) {
                wiphy_err(wiphy, "set default Tx key index\n");
                return -EFAULT;
        }

        return 0;
}

/*
 * CFG802.11 operation handler to add a network key.
 */
static int
mwifiex_cfg80211_add_key(struct wiphy *wiphy, struct net_device *netdev,
                         u8 key_index, bool pairwise, const u8 *mac_addr,
                         struct key_params *params)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(netdev);
        struct mwifiex_wep_key *wep_key;
        const u8 bc_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
        const u8 *peer_mac = pairwise ? mac_addr : bc_mac;

        if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP &&
            (params->cipher == WLAN_CIPHER_SUITE_WEP40 ||
             params->cipher == WLAN_CIPHER_SUITE_WEP104)) {
                if (params->key && params->key_len) {
                        wep_key = &priv->wep_key[key_index];
                        memset(wep_key, 0, sizeof(struct mwifiex_wep_key));
                        memcpy(wep_key->key_material, params->key,
                               params->key_len);
                        wep_key->key_index = key_index;
                        wep_key->key_length = params->key_len;
                        priv->sec_info.wep_enabled = 1;
                }
                return 0;
        }

        if (mwifiex_set_encode(priv, params, params->key, params->key_len,
                               key_index, peer_mac, 0)) {
                wiphy_err(wiphy, "crypto keys added\n");
                return -EFAULT;
        }

        return 0;
}

/*
 * This function sends domain information to the firmware.
 *
 * The following information are passed to the firmware -
 *      - Country codes
 *      - Sub bands (first channel, number of channels, maximum Tx power)
 */
static int mwifiex_send_domain_info_cmd_fw(struct wiphy *wiphy)
{
        u8 no_of_triplet = 0;
        struct ieee80211_country_ie_triplet *t;
        u8 no_of_parsed_chan = 0;
        u8 first_chan = 0, next_chan = 0, max_pwr = 0;
        u8 i, flag = 0;
        enum ieee80211_band band;
        struct ieee80211_supported_band *sband;
        struct ieee80211_channel *ch;
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);
        struct mwifiex_private *priv;
        struct mwifiex_802_11d_domain_reg *domain_info = &adapter->domain_reg;

        /* Set country code */
        domain_info->country_code[0] = adapter->country_code[0];
        domain_info->country_code[1] = adapter->country_code[1];
        domain_info->country_code[2] = ' ';

        band = mwifiex_band_to_radio_type(adapter->config_bands);
        if (!wiphy->bands[band]) {
                wiphy_err(wiphy, "11D: setting domain info in FW\n");
                return -1;
        }

        sband = wiphy->bands[band];

        for (i = 0; i < sband->n_channels ; i++) {
                ch = &sband->channels[i];
                if (ch->flags & IEEE80211_CHAN_DISABLED)
                        continue;

                if (!flag) {
                        flag = 1;
                        first_chan = (u32) ch->hw_value;
                        next_chan = first_chan;
                        max_pwr = ch->max_power;
                        no_of_parsed_chan = 1;
                        continue;
                }

                if (ch->hw_value == next_chan + 1 &&
                    ch->max_power == max_pwr) {
                        next_chan++;
                        no_of_parsed_chan++;
                } else {
                        t = &domain_info->triplet[no_of_triplet];
                        t->chans.first_channel = first_chan;
                        t->chans.num_channels = no_of_parsed_chan;
                        t->chans.max_power = max_pwr;
                        no_of_triplet++;
                        first_chan = (u32) ch->hw_value;
                        next_chan = first_chan;
                        max_pwr = ch->max_power;
                        no_of_parsed_chan = 1;
                }
        }

        if (flag) {
                t = &domain_info->triplet[no_of_triplet];
                t->chans.first_channel = first_chan;
                t->chans.num_channels = no_of_parsed_chan;
                t->chans.max_power = max_pwr;
                no_of_triplet++;
        }

        domain_info->no_of_triplet = no_of_triplet;

        priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);

        if (mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11D_DOMAIN_INFO,
                                   HostCmd_ACT_GEN_SET, 0, NULL)) {
                wiphy_err(wiphy, "11D: setting domain info in FW\n");
                return -1;
        }

        return 0;
}

/*
 * CFG802.11 regulatory domain callback function.
 *
 * This function is called when the regulatory domain is changed due to the
 * following reasons -
 *      - Set by driver
 *      - Set by system core
 *      - Set by user
 *      - Set bt Country IE
 */
static void mwifiex_reg_notifier(struct wiphy *wiphy,
                                 struct regulatory_request *request)
{
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);

        wiphy_dbg(wiphy, "info: cfg80211 regulatory domain callback for %c%c\n",
                  request->alpha2[0], request->alpha2[1]);

        memcpy(adapter->country_code, request->alpha2, sizeof(request->alpha2));

        switch (request->initiator) {
        case NL80211_REGDOM_SET_BY_DRIVER:
        case NL80211_REGDOM_SET_BY_CORE:
        case NL80211_REGDOM_SET_BY_USER:
                break;
                /* Todo: apply driver specific changes in channel flags based
                   on the request initiator if necessary. */
        case NL80211_REGDOM_SET_BY_COUNTRY_IE:
                break;
        }
        mwifiex_send_domain_info_cmd_fw(wiphy);
}

/*
 * This function sets the fragmentation threshold.
 *
 * The fragmentation threshold value must lie between MWIFIEX_FRAG_MIN_VALUE
 * and MWIFIEX_FRAG_MAX_VALUE.
 */
static int
mwifiex_set_frag(struct mwifiex_private *priv, u32 frag_thr)
{
        if (frag_thr < MWIFIEX_FRAG_MIN_VALUE ||
            frag_thr > MWIFIEX_FRAG_MAX_VALUE)
                frag_thr = MWIFIEX_FRAG_MAX_VALUE;

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB,
                                     HostCmd_ACT_GEN_SET, FRAG_THRESH_I,
                                     &frag_thr);
}

/*
 * This function sets the RTS threshold.

 * The rts value must lie between MWIFIEX_RTS_MIN_VALUE
 * and MWIFIEX_RTS_MAX_VALUE.
 */
static int
mwifiex_set_rts(struct mwifiex_private *priv, u32 rts_thr)
{
        if (rts_thr < MWIFIEX_RTS_MIN_VALUE || rts_thr > MWIFIEX_RTS_MAX_VALUE)
                rts_thr = MWIFIEX_RTS_MAX_VALUE;

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB,
                                    HostCmd_ACT_GEN_SET, RTS_THRESH_I,
                                    &rts_thr);
}

/*
 * CFG802.11 operation handler to set wiphy parameters.
 *
 * This function can be used to set the RTS threshold and the
 * Fragmentation threshold of the driver.
 */
static int
mwifiex_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
{
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);
        struct mwifiex_private *priv;
        struct mwifiex_uap_bss_param *bss_cfg;
        int ret, bss_started, i;

        for (i = 0; i < adapter->priv_num; i++) {
                priv = adapter->priv[i];

                switch (priv->bss_role) {
                case MWIFIEX_BSS_ROLE_UAP:
                        bss_cfg = kzalloc(sizeof(struct mwifiex_uap_bss_param),
                                          GFP_KERNEL);
                        if (!bss_cfg)
                                return -ENOMEM;

                        mwifiex_set_sys_config_invalid_data(bss_cfg);

                        if (changed & WIPHY_PARAM_RTS_THRESHOLD)
                                bss_cfg->rts_threshold = wiphy->rts_threshold;
                        if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
                                bss_cfg->frag_threshold = wiphy->frag_threshold;
                        if (changed & WIPHY_PARAM_RETRY_LONG)
                                bss_cfg->retry_limit = wiphy->retry_long;

                        bss_started = priv->bss_started;

                        ret = mwifiex_send_cmd_sync(priv,
                                                    HostCmd_CMD_UAP_BSS_STOP,
                                                    HostCmd_ACT_GEN_SET, 0,
                                                    NULL);
                        if (ret) {
                                wiphy_err(wiphy, "Failed to stop the BSS\n");
                                kfree(bss_cfg);
                                return ret;
                        }

                        ret = mwifiex_send_cmd_async(priv,
                                                     HostCmd_CMD_UAP_SYS_CONFIG,
                                                     HostCmd_ACT_GEN_SET,
                                                     UAP_BSS_PARAMS_I, bss_cfg);

                        kfree(bss_cfg);

                        if (ret) {
                                wiphy_err(wiphy, "Failed to set bss config\n");
                                return ret;
                        }

                        if (!bss_started)
                                break;

                        ret = mwifiex_send_cmd_async(priv,
                                                     HostCmd_CMD_UAP_BSS_START,
                                                     HostCmd_ACT_GEN_SET, 0,
                                                     NULL);
                        if (ret) {
                                wiphy_err(wiphy, "Failed to start BSS\n");
                                return ret;
                        }

                        break;
                case MWIFIEX_BSS_ROLE_STA:
                        if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
                                ret = mwifiex_set_rts(priv,
                                                      wiphy->rts_threshold);
                                if (ret)
                                        return ret;
                        }
                        if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
                                ret = mwifiex_set_frag(priv,
                                                       wiphy->frag_threshold);
                                if (ret)
                                        return ret;
                        }
                        break;
                }
        }

        return 0;
}

static int
mwifiex_cfg80211_deinit_p2p(struct mwifiex_private *priv)
{
        u16 mode = P2P_MODE_DISABLE;

        if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_STA)
                mwifiex_set_bss_role(priv, MWIFIEX_BSS_ROLE_STA);

        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_P2P_MODE_CFG,
                                  HostCmd_ACT_GEN_SET, 0, &mode))
                return -1;

        return 0;
}

/*
 * This function initializes the functionalities for P2P client.
 * The P2P client initialization sequence is:
 * disable -> device -> client
 */
static int
mwifiex_cfg80211_init_p2p_client(struct mwifiex_private *priv)
{
        u16 mode;

        if (mwifiex_cfg80211_deinit_p2p(priv))
                return -1;

        mode = P2P_MODE_DEVICE;
        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_P2P_MODE_CFG,
                                  HostCmd_ACT_GEN_SET, 0, &mode))
                return -1;

        mode = P2P_MODE_CLIENT;
        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_P2P_MODE_CFG,
                                  HostCmd_ACT_GEN_SET, 0, &mode))
                return -1;

        return 0;
}

/*
 * This function initializes the functionalities for P2P GO.
 * The P2P GO initialization sequence is:
 * disable -> device -> GO
 */
static int
mwifiex_cfg80211_init_p2p_go(struct mwifiex_private *priv)
{
        u16 mode;

        if (mwifiex_cfg80211_deinit_p2p(priv))
                return -1;

        mode = P2P_MODE_DEVICE;
        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_P2P_MODE_CFG,
                                  HostCmd_ACT_GEN_SET, 0, &mode))
                return -1;

        mode = P2P_MODE_GO;
        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_P2P_MODE_CFG,
                                  HostCmd_ACT_GEN_SET, 0, &mode))
                return -1;

        if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_UAP)
                mwifiex_set_bss_role(priv, MWIFIEX_BSS_ROLE_UAP);

        return 0;
}

/*
 * CFG802.11 operation handler to change interface type.
 */
static int
mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
                                     struct net_device *dev,
                                     enum nl80211_iftype type, u32 *flags,
                                     struct vif_params *params)
{
        int ret;
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

        switch (dev->ieee80211_ptr->iftype) {
        case NL80211_IFTYPE_ADHOC:
                switch (type) {
                case NL80211_IFTYPE_STATION:
                        break;
                case NL80211_IFTYPE_UNSPECIFIED:
                        wiphy_warn(wiphy, "%s: kept type as IBSS\n", dev->name);
                case NL80211_IFTYPE_ADHOC:      /* This shouldn't happen */
                        return 0;
                case NL80211_IFTYPE_AP:
                default:
                        wiphy_err(wiphy, "%s: changing to %d not supported\n",
                                  dev->name, type);
                        return -EOPNOTSUPP;
                }
                break;
        case NL80211_IFTYPE_STATION:
                switch (type) {
                case NL80211_IFTYPE_ADHOC:
                        break;
                case NL80211_IFTYPE_P2P_CLIENT:
                        if (mwifiex_cfg80211_init_p2p_client(priv))
                                return -EFAULT;
                        dev->ieee80211_ptr->iftype = type;
                        return 0;
                case NL80211_IFTYPE_P2P_GO:
                        if (mwifiex_cfg80211_init_p2p_go(priv))
                                return -EFAULT;
                        dev->ieee80211_ptr->iftype = type;
                        return 0;
                case NL80211_IFTYPE_UNSPECIFIED:
                        wiphy_warn(wiphy, "%s: kept type as STA\n", dev->name);
                case NL80211_IFTYPE_STATION:    /* This shouldn't happen */
                        return 0;
                case NL80211_IFTYPE_AP:
                default:
                        wiphy_err(wiphy, "%s: changing to %d not supported\n",
                                  dev->name, type);
                        return -EOPNOTSUPP;
                }
                break;
        case NL80211_IFTYPE_AP:
                switch (type) {
                case NL80211_IFTYPE_UNSPECIFIED:
                        wiphy_warn(wiphy, "%s: kept type as AP\n", dev->name);
                case NL80211_IFTYPE_AP:         /* This shouldn't happen */
                        return 0;
                case NL80211_IFTYPE_ADHOC:
                case NL80211_IFTYPE_STATION:
                default:
                        wiphy_err(wiphy, "%s: changing to %d not supported\n",
                                  dev->name, type);
                        return -EOPNOTSUPP;
                }
                break;
        case NL80211_IFTYPE_P2P_CLIENT:
        case NL80211_IFTYPE_P2P_GO:
                switch (type) {
                case NL80211_IFTYPE_STATION:
                        if (mwifiex_cfg80211_deinit_p2p(priv))
                                return -EFAULT;
                        dev->ieee80211_ptr->iftype = type;
                        return 0;
                default:
                        return -EOPNOTSUPP;
                }
                break;
        default:
                wiphy_err(wiphy, "%s: unknown iftype: %d\n",
                          dev->name, dev->ieee80211_ptr->iftype);
                return -EOPNOTSUPP;
        }

        dev->ieee80211_ptr->iftype = type;
        priv->bss_mode = type;
        mwifiex_deauthenticate(priv, NULL);

        priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;

        ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_SET_BSS_MODE,
                                    HostCmd_ACT_GEN_SET, 0, NULL);

        return ret;
}

static void
mwifiex_parse_htinfo(struct mwifiex_private *priv, u8 tx_htinfo,
                     struct rate_info *rate)
{
        struct mwifiex_adapter *adapter = priv->adapter;

        if (adapter->is_hw_11ac_capable) {
                /* bit[1-0]: 00=LG 01=HT 10=VHT */
                if (tx_htinfo & BIT(0)) {
                        /* HT */
                        rate->mcs = priv->tx_rate;
                        rate->flags |= RATE_INFO_FLAGS_MCS;
                }
                if (tx_htinfo & BIT(1)) {
                        /* VHT */
                        rate->mcs = priv->tx_rate & 0x0F;
                        rate->flags |= RATE_INFO_FLAGS_VHT_MCS;
                }

                if (tx_htinfo & (BIT(1) | BIT(0))) {
                        /* HT or VHT */
                        switch (tx_htinfo & (BIT(3) | BIT(2))) {
                        case 0:
                                /* This will be 20MHz */
                                break;
                        case (BIT(2)):
                                rate->flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
                                break;
                        case (BIT(3)):
                                rate->flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
                                break;
                        case (BIT(3) | BIT(2)):
                                rate->flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
                                break;
                        }

                        if (tx_htinfo & BIT(4))
                                rate->flags |= RATE_INFO_FLAGS_SHORT_GI;

                        if ((priv->tx_rate >> 4) == 1)
                                rate->nss = 2;
                        else
                                rate->nss = 1;
                }
        } else {
                /*
                 * Bit 0 in tx_htinfo indicates that current Tx rate
                 * is 11n rate. Valid MCS index values for us are 0 to 15.
                 */
                if ((tx_htinfo & BIT(0)) && (priv->tx_rate < 16)) {
                        rate->mcs = priv->tx_rate;
                        rate->flags |= RATE_INFO_FLAGS_MCS;
                        if (tx_htinfo & BIT(1))
                                rate->flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
                        if (tx_htinfo & BIT(2))
                                rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
                }
        }
}

/*
 * This function dumps the station information on a buffer.
 *
 * The following information are shown -
 *      - Total bytes transmitted
 *      - Total bytes received
 *      - Total packets transmitted
 *      - Total packets received
 *      - Signal quality level
 *      - Transmission rate
 */
static int
mwifiex_dump_station_info(struct mwifiex_private *priv,
                          struct station_info *sinfo)
{
        u32 rate;

        sinfo->filled = STATION_INFO_RX_BYTES | STATION_INFO_TX_BYTES |
                        STATION_INFO_RX_PACKETS | STATION_INFO_TX_PACKETS |
                        STATION_INFO_TX_BITRATE |
                        STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG;

        /* Get signal information from the firmware */
        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_RSSI_INFO,
                                  HostCmd_ACT_GEN_GET, 0, NULL)) {
                dev_err(priv->adapter->dev, "failed to get signal information\n");
                return -EFAULT;
        }

        if (mwifiex_drv_get_data_rate(priv, &rate)) {
                dev_err(priv->adapter->dev, "getting data rate\n");
                return -EFAULT;
        }

        /* Get DTIM period information from firmware */
        mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_SNMP_MIB,
                              HostCmd_ACT_GEN_GET, DTIM_PERIOD_I,
                              &priv->dtim_period);

        mwifiex_parse_htinfo(priv, priv->tx_htinfo, &sinfo->txrate);

        sinfo->signal_avg = priv->bcn_rssi_avg;
        sinfo->rx_bytes = priv->stats.rx_bytes;
        sinfo->tx_bytes = priv->stats.tx_bytes;
        sinfo->rx_packets = priv->stats.rx_packets;
        sinfo->tx_packets = priv->stats.tx_packets;
        sinfo->signal = priv->bcn_rssi_avg;
        /* bit rate is in 500 kb/s units. Convert it to 100kb/s units */
        sinfo->txrate.legacy = rate * 5;

        if (priv->bss_mode == NL80211_IFTYPE_STATION) {
                sinfo->filled |= STATION_INFO_BSS_PARAM;
                sinfo->bss_param.flags = 0;
                if (priv->curr_bss_params.bss_descriptor.cap_info_bitmap &
                                                WLAN_CAPABILITY_SHORT_PREAMBLE)
                        sinfo->bss_param.flags |=
                                        BSS_PARAM_FLAGS_SHORT_PREAMBLE;
                if (priv->curr_bss_params.bss_descriptor.cap_info_bitmap &
                                                WLAN_CAPABILITY_SHORT_SLOT_TIME)
                        sinfo->bss_param.flags |=
                                        BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
                sinfo->bss_param.dtim_period = priv->dtim_period;
                sinfo->bss_param.beacon_interval =
                        priv->curr_bss_params.bss_descriptor.beacon_period;
        }

        return 0;
}

/*
 * CFG802.11 operation handler to get station information.
 *
 * This function only works in connected mode, and dumps the
 * requested station information, if available.
 */
static int
mwifiex_cfg80211_get_station(struct wiphy *wiphy, struct net_device *dev,
                             u8 *mac, struct station_info *sinfo)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

        if (!priv->media_connected)
                return -ENOENT;
        if (memcmp(mac, priv->cfg_bssid, ETH_ALEN))
                return -ENOENT;

        return mwifiex_dump_station_info(priv, sinfo);
}

/*

 * CFG802.11 operation handler to dump station information.
 */
static int
mwifiex_cfg80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
                              int idx, u8 *mac, struct station_info *sinfo)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

        if (!priv->media_connected || idx)
                return -ENOENT;

        memcpy(mac, priv->cfg_bssid, ETH_ALEN);

        return mwifiex_dump_station_info(priv, sinfo);
}

/* Supported rates to be advertised to the cfg80211 */
static struct ieee80211_rate mwifiex_rates[] = {
        {.bitrate = 10, .hw_value = 2, },
        {.bitrate = 20, .hw_value = 4, },
        {.bitrate = 55, .hw_value = 11, },
        {.bitrate = 110, .hw_value = 22, },
        {.bitrate = 60, .hw_value = 12, },
        {.bitrate = 90, .hw_value = 18, },
        {.bitrate = 120, .hw_value = 24, },
        {.bitrate = 180, .hw_value = 36, },
        {.bitrate = 240, .hw_value = 48, },
        {.bitrate = 360, .hw_value = 72, },
        {.bitrate = 480, .hw_value = 96, },
        {.bitrate = 540, .hw_value = 108, },
};

/* Channel definitions to be advertised to cfg80211 */
static struct ieee80211_channel mwifiex_channels_2ghz[] = {
        {.center_freq = 2412, .hw_value = 1, },
        {.center_freq = 2417, .hw_value = 2, },
        {.center_freq = 2422, .hw_value = 3, },
        {.center_freq = 2427, .hw_value = 4, },
        {.center_freq = 2432, .hw_value = 5, },
        {.center_freq = 2437, .hw_value = 6, },
        {.center_freq = 2442, .hw_value = 7, },
        {.center_freq = 2447, .hw_value = 8, },
        {.center_freq = 2452, .hw_value = 9, },
        {.center_freq = 2457, .hw_value = 10, },
        {.center_freq = 2462, .hw_value = 11, },
        {.center_freq = 2467, .hw_value = 12, },
        {.center_freq = 2472, .hw_value = 13, },
        {.center_freq = 2484, .hw_value = 14, },
};

static struct ieee80211_supported_band mwifiex_band_2ghz = {
        .channels = mwifiex_channels_2ghz,
        .n_channels = ARRAY_SIZE(mwifiex_channels_2ghz),
        .bitrates = mwifiex_rates,
        .n_bitrates = ARRAY_SIZE(mwifiex_rates),
};

static struct ieee80211_channel mwifiex_channels_5ghz[] = {
        {.center_freq = 5040, .hw_value = 8, },
        {.center_freq = 5060, .hw_value = 12, },
        {.center_freq = 5080, .hw_value = 16, },
        {.center_freq = 5170, .hw_value = 34, },
        {.center_freq = 5190, .hw_value = 38, },
        {.center_freq = 5210, .hw_value = 42, },
        {.center_freq = 5230, .hw_value = 46, },
        {.center_freq = 5180, .hw_value = 36, },
        {.center_freq = 5200, .hw_value = 40, },
        {.center_freq = 5220, .hw_value = 44, },
        {.center_freq = 5240, .hw_value = 48, },
        {.center_freq = 5260, .hw_value = 52, },
        {.center_freq = 5280, .hw_value = 56, },
        {.center_freq = 5300, .hw_value = 60, },
        {.center_freq = 5320, .hw_value = 64, },
        {.center_freq = 5500, .hw_value = 100, },
        {.center_freq = 5520, .hw_value = 104, },
        {.center_freq = 5540, .hw_value = 108, },
        {.center_freq = 5560, .hw_value = 112, },
        {.center_freq = 5580, .hw_value = 116, },
        {.center_freq = 5600, .hw_value = 120, },
        {.center_freq = 5620, .hw_value = 124, },
        {.center_freq = 5640, .hw_value = 128, },
        {.center_freq = 5660, .hw_value = 132, },
        {.center_freq = 5680, .hw_value = 136, },
        {.center_freq = 5700, .hw_value = 140, },
        {.center_freq = 5745, .hw_value = 149, },
        {.center_freq = 5765, .hw_value = 153, },
        {.center_freq = 5785, .hw_value = 157, },
        {.center_freq = 5805, .hw_value = 161, },
        {.center_freq = 5825, .hw_value = 165, },
};

static struct ieee80211_supported_band mwifiex_band_5ghz = {
        .channels = mwifiex_channels_5ghz,
        .n_channels = ARRAY_SIZE(mwifiex_channels_5ghz),
        .bitrates = mwifiex_rates + 4,
        .n_bitrates = ARRAY_SIZE(mwifiex_rates) - 4,
};


/* Supported crypto cipher suits to be advertised to cfg80211 */
static const u32 mwifiex_cipher_suites[] = {
        WLAN_CIPHER_SUITE_WEP40,
        WLAN_CIPHER_SUITE_WEP104,
        WLAN_CIPHER_SUITE_TKIP,
        WLAN_CIPHER_SUITE_CCMP,
        WLAN_CIPHER_SUITE_AES_CMAC,
};

/* Supported mgmt frame types to be advertised to cfg80211 */
static const struct ieee80211_txrx_stypes
mwifiex_mgmt_stypes[NUM_NL80211_IFTYPES] = {
        [NL80211_IFTYPE_STATION] = {
                .tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
                      BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
                .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
                      BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
        },
        [NL80211_IFTYPE_AP] = {
                .tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
                      BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
                .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
                      BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
        },
        [NL80211_IFTYPE_P2P_CLIENT] = {
                .tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
                      BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
                .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
                      BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
        },
        [NL80211_IFTYPE_P2P_GO] = {
                .tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
                      BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
                .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
                      BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
        },
};

/*
 * CFG802.11 operation handler for setting bit rates.
 *
 * Function configures data rates to firmware using bitrate mask
 * provided by cfg80211.
 */
static int mwifiex_cfg80211_set_bitrate_mask(struct wiphy *wiphy,
                                struct net_device *dev,
                                const u8 *peer,
                                const struct cfg80211_bitrate_mask *mask)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
        u16 bitmap_rates[MAX_BITMAP_RATES_SIZE];
        enum ieee80211_band band;

        if (!priv->media_connected) {
                dev_err(priv->adapter->dev,
                        "Can not set Tx data rate in disconnected state\n");
                return -EINVAL;
        }

        band = mwifiex_band_to_radio_type(priv->curr_bss_params.band);

        memset(bitmap_rates, 0, sizeof(bitmap_rates));

        /* Fill HR/DSSS rates. */
        if (band == IEEE80211_BAND_2GHZ)
                bitmap_rates[0] = mask->control[band].legacy & 0x000f;

        /* Fill OFDM rates */
        if (band == IEEE80211_BAND_2GHZ)
                bitmap_rates[1] = (mask->control[band].legacy & 0x0ff0) >> 4;
        else
                bitmap_rates[1] = mask->control[band].legacy;

        /* Fill MCS rates */
        bitmap_rates[2] = mask->control[band].mcs[0];
        if (priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2)
                bitmap_rates[2] |= mask->control[band].mcs[1] << 8;

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_TX_RATE_CFG,
                                     HostCmd_ACT_GEN_SET, 0, bitmap_rates);
}

/*
 * CFG802.11 operation handler for connection quality monitoring.
 *
 * This function subscribes/unsubscribes HIGH_RSSI and LOW_RSSI
 * events to FW.
 */
static int mwifiex_cfg80211_set_cqm_rssi_config(struct wiphy *wiphy,
                                                struct net_device *dev,
                                                s32 rssi_thold, u32 rssi_hyst)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
        struct mwifiex_ds_misc_subsc_evt subsc_evt;

        priv->cqm_rssi_thold = rssi_thold;
        priv->cqm_rssi_hyst = rssi_hyst;

        memset(&subsc_evt, 0x00, sizeof(struct mwifiex_ds_misc_subsc_evt));
        subsc_evt.events = BITMASK_BCN_RSSI_LOW | BITMASK_BCN_RSSI_HIGH;

        /* Subscribe/unsubscribe low and high rssi events */
        if (rssi_thold && rssi_hyst) {
                subsc_evt.action = HostCmd_ACT_BITWISE_SET;
                subsc_evt.bcn_l_rssi_cfg.abs_value = abs(rssi_thold);
                subsc_evt.bcn_h_rssi_cfg.abs_value = abs(rssi_thold);
                subsc_evt.bcn_l_rssi_cfg.evt_freq = 1;
                subsc_evt.bcn_h_rssi_cfg.evt_freq = 1;
                return mwifiex_send_cmd_sync(priv,
                                             HostCmd_CMD_802_11_SUBSCRIBE_EVENT,
                                             0, 0, &subsc_evt);
        } else {
                subsc_evt.action = HostCmd_ACT_BITWISE_CLR;
                return mwifiex_send_cmd_sync(priv,
                                             HostCmd_CMD_802_11_SUBSCRIBE_EVENT,
                                             0, 0, &subsc_evt);
        }

        return 0;
}

/* cfg80211 operation handler for change_beacon.
 * Function retrieves and sets modified management IEs to FW.
 */
static int mwifiex_cfg80211_change_beacon(struct wiphy *wiphy,
                                          struct net_device *dev,
                                          struct cfg80211_beacon_data *data)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

        if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_UAP) {
                wiphy_err(wiphy, "%s: bss_type mismatched\n", __func__);
                return -EINVAL;
        }

        if (!priv->bss_started) {
                wiphy_err(wiphy, "%s: bss not started\n", __func__);
                return -EINVAL;
        }

        if (mwifiex_set_mgmt_ies(priv, data)) {
                wiphy_err(wiphy, "%s: setting mgmt ies failed\n", __func__);
                return -EFAULT;
        }

        return 0;
}

/* cfg80211 operation handler for del_station.
 * Function deauthenticates station which value is provided in mac parameter.
 * If mac is NULL/broadcast, all stations in associated station list are
 * deauthenticated. If bss is not started or there are no stations in
 * associated stations list, no action is taken.
 */
static int
mwifiex_cfg80211_del_station(struct wiphy *wiphy, struct net_device *dev,
                             u8 *mac)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
        struct mwifiex_sta_node *sta_node;
        unsigned long flags;

        if (list_empty(&priv->sta_list) || !priv->bss_started)
                return 0;

        if (!mac || is_broadcast_ether_addr(mac)) {
                wiphy_dbg(wiphy, "%s: NULL/broadcast mac address\n", __func__);
                list_for_each_entry(sta_node, &priv->sta_list, list) {
                        if (mwifiex_send_cmd_sync(priv,
                                                  HostCmd_CMD_UAP_STA_DEAUTH,
                                                  HostCmd_ACT_GEN_SET, 0,
                                                  sta_node->mac_addr))
                                return -1;
                        mwifiex_uap_del_sta_data(priv, sta_node);
                }
        } else {
                wiphy_dbg(wiphy, "%s: mac address %pM\n", __func__, mac);
                spin_lock_irqsave(&priv->sta_list_spinlock, flags);
                sta_node = mwifiex_get_sta_entry(priv, mac);
                spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
                if (sta_node) {
                        if (mwifiex_send_cmd_sync(priv,
                                                  HostCmd_CMD_UAP_STA_DEAUTH,
                                                  HostCmd_ACT_GEN_SET, 0,
                                                  sta_node->mac_addr))
                                return -1;
                        mwifiex_uap_del_sta_data(priv, sta_node);
                }
        }

        return 0;
}

static int
mwifiex_cfg80211_set_antenna(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant)
{
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);
        struct mwifiex_private *priv = mwifiex_get_priv(adapter,
                                                        MWIFIEX_BSS_ROLE_ANY);
        struct mwifiex_ds_ant_cfg ant_cfg;

        if (!tx_ant || !rx_ant)
                return -EOPNOTSUPP;

        if (adapter->hw_dev_mcs_support != HT_STREAM_2X2) {
                /* Not a MIMO chip. User should provide specific antenna number
                 * for Tx/Rx path or enable all antennas for diversity
                 */
                if (tx_ant != rx_ant)
                        return -EOPNOTSUPP;

                if ((tx_ant & (tx_ant - 1)) &&
                    (tx_ant != BIT(adapter->number_of_antenna) - 1))
                        return -EOPNOTSUPP;

                if ((tx_ant == BIT(adapter->number_of_antenna) - 1) &&
                    (priv->adapter->number_of_antenna > 1)) {
                        tx_ant = RF_ANTENNA_AUTO;
                        rx_ant = RF_ANTENNA_AUTO;
                }
        }

        ant_cfg.tx_ant = tx_ant;
        ant_cfg.rx_ant = rx_ant;

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_RF_ANTENNA,
                                     HostCmd_ACT_GEN_SET, 0, &ant_cfg);
}

/* cfg80211 operation handler for stop ap.
 * Function stops BSS running at uAP interface.
 */
static int mwifiex_cfg80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

        if (mwifiex_del_mgmt_ies(priv))
                wiphy_err(wiphy, "Failed to delete mgmt IEs!\n");

        priv->ap_11n_enabled = 0;

        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_UAP_BSS_STOP,
                                  HostCmd_ACT_GEN_SET, 0, NULL)) {
                wiphy_err(wiphy, "Failed to stop the BSS\n");
                return -1;
        }

        return 0;
}

/* cfg80211 operation handler for start_ap.
 * Function sets beacon period, DTIM period, SSID and security into
 * AP config structure.
 * AP is configured with these settings and BSS is started.
 */
static int mwifiex_cfg80211_start_ap(struct wiphy *wiphy,
                                     struct net_device *dev,
                                     struct cfg80211_ap_settings *params)
{
        struct mwifiex_uap_bss_param *bss_cfg;
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
        u8 config_bands = 0;

        if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_UAP)
                return -1;
        if (mwifiex_set_mgmt_ies(priv, &params->beacon))
                return -1;

        bss_cfg = kzalloc(sizeof(struct mwifiex_uap_bss_param), GFP_KERNEL);
        if (!bss_cfg)
                return -ENOMEM;

        mwifiex_set_sys_config_invalid_data(bss_cfg);

        if (params->beacon_interval)
                bss_cfg->beacon_period = params->beacon_interval;
        if (params->dtim_period)
                bss_cfg->dtim_period = params->dtim_period;

        if (params->ssid && params->ssid_len) {
                memcpy(bss_cfg->ssid.ssid, params->ssid, params->ssid_len);
                bss_cfg->ssid.ssid_len = params->ssid_len;
        }

        switch (params->hidden_ssid) {
        case NL80211_HIDDEN_SSID_NOT_IN_USE:
                bss_cfg->bcast_ssid_ctl = 1;
                break;
        case NL80211_HIDDEN_SSID_ZERO_LEN:
                bss_cfg->bcast_ssid_ctl = 0;
                break;
        case NL80211_HIDDEN_SSID_ZERO_CONTENTS:
                /* firmware doesn't support this type of hidden SSID */
        default:
                kfree(bss_cfg);
                return -EINVAL;
        }

        bss_cfg->channel = ieee80211_frequency_to_channel(
                                params->chandef.chan->center_freq);

        /* Set appropriate bands */
        if (params->chandef.chan->band == IEEE80211_BAND_2GHZ) {
                bss_cfg->band_cfg = BAND_CONFIG_BG;
                config_bands = BAND_B | BAND_G;

                if (params->chandef.width > NL80211_CHAN_WIDTH_20_NOHT)
                        config_bands |= BAND_GN;

                if (params->chandef.width > NL80211_CHAN_WIDTH_40)
                        config_bands |= BAND_GAC;
        } else {
                bss_cfg->band_cfg = BAND_CONFIG_A;
                config_bands = BAND_A;

                if (params->chandef.width > NL80211_CHAN_WIDTH_20_NOHT)
                        config_bands |= BAND_AN;

                if (params->chandef.width > NL80211_CHAN_WIDTH_40)
                        config_bands |= BAND_AAC;
        }

        if (!((config_bands | priv->adapter->fw_bands) &
              ~priv->adapter->fw_bands))
                priv->adapter->config_bands = config_bands;

        mwifiex_set_uap_rates(bss_cfg, params);
        mwifiex_send_domain_info_cmd_fw(wiphy);

        if (mwifiex_set_secure_params(priv, bss_cfg, params)) {
                kfree(bss_cfg);
                wiphy_err(wiphy, "Failed to parse secuirty parameters!\n");
                return -1;
        }

        mwifiex_set_ht_params(priv, bss_cfg, params);

        if (priv->adapter->is_hw_11ac_capable) {
                mwifiex_set_vht_params(priv, bss_cfg, params);
                mwifiex_set_vht_width(priv, params->chandef.width,
                                      priv->ap_11ac_enabled);
        }

        if (priv->ap_11ac_enabled)
                mwifiex_set_11ac_ba_params(priv);
        else
                mwifiex_set_ba_params(priv);

        mwifiex_set_wmm_params(priv, bss_cfg, params);

        if (params->inactivity_timeout > 0) {
                /* sta_ao_timer/ps_sta_ao_timer is in unit of 100ms */
                bss_cfg->sta_ao_timer = 10 * params->inactivity_timeout;
                bss_cfg->ps_sta_ao_timer = 10 * params->inactivity_timeout;
        }

        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_UAP_BSS_STOP,
                                  HostCmd_ACT_GEN_SET, 0, NULL)) {
                wiphy_err(wiphy, "Failed to stop the BSS\n");
                kfree(bss_cfg);
                return -1;
        }

        if (mwifiex_send_cmd_async(priv, HostCmd_CMD_UAP_SYS_CONFIG,
                                   HostCmd_ACT_GEN_SET,
                                   UAP_BSS_PARAMS_I, bss_cfg)) {
                wiphy_err(wiphy, "Failed to set the SSID\n");
                kfree(bss_cfg);
                return -1;
        }

        kfree(bss_cfg);

        if (mwifiex_send_cmd_async(priv, HostCmd_CMD_UAP_BSS_START,
                                   HostCmd_ACT_GEN_SET, 0, NULL)) {
                wiphy_err(wiphy, "Failed to start the BSS\n");
                return -1;
        }

        if (priv->sec_info.wep_enabled)
                priv->curr_pkt_filter |= HostCmd_ACT_MAC_WEP_ENABLE;
        else
                priv->curr_pkt_filter &= ~HostCmd_ACT_MAC_WEP_ENABLE;

        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_MAC_CONTROL,
                                  HostCmd_ACT_GEN_SET, 0,
                                  &priv->curr_pkt_filter))
                return -1;

        return 0;
}

/*
 * CFG802.11 operation handler for disconnection request.
 *
 * This function does not work when there is already a disconnection
 * procedure going on.
 */
static int
mwifiex_cfg80211_disconnect(struct wiphy *wiphy, struct net_device *dev,
                            u16 reason_code)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

        if (mwifiex_deauthenticate(priv, NULL))
                return -EFAULT;

        wiphy_dbg(wiphy, "info: successfully disconnected from %pM:"
                " reason code %d\n", priv->cfg_bssid, reason_code);

        memset(priv->cfg_bssid, 0, ETH_ALEN);
        priv->hs2_enabled = false;

        return 0;
}

/*
 * This function informs the CFG802.11 subsystem of a new IBSS.
 *
 * The following information are sent to the CFG802.11 subsystem
 * to register the new IBSS. If we do not register the new IBSS,
 * a kernel panic will result.
 *      - SSID
 *      - SSID length
 *      - BSSID
 *      - Channel
 */
static int mwifiex_cfg80211_inform_ibss_bss(struct mwifiex_private *priv)
{
        struct ieee80211_channel *chan;
        struct mwifiex_bss_info bss_info;
        struct cfg80211_bss *bss;
        int ie_len;
        u8 ie_buf[IEEE80211_MAX_SSID_LEN + sizeof(struct ieee_types_header)];
        enum ieee80211_band band;

        if (mwifiex_get_bss_info(priv, &bss_info))
                return -1;

        ie_buf[0] = WLAN_EID_SSID;
        ie_buf[1] = bss_info.ssid.ssid_len;

        memcpy(&ie_buf[sizeof(struct ieee_types_header)],
               &bss_info.ssid.ssid, bss_info.ssid.ssid_len);
        ie_len = ie_buf[1] + sizeof(struct ieee_types_header);

        band = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
        chan = __ieee80211_get_channel(priv->wdev->wiphy,
                        ieee80211_channel_to_frequency(bss_info.bss_chan,
                                                       band));

        bss = cfg80211_inform_bss(priv->wdev->wiphy, chan,
                                  bss_info.bssid, 0, WLAN_CAPABILITY_IBSS,
                                  0, ie_buf, ie_len, 0, GFP_KERNEL);
        cfg80211_put_bss(priv->wdev->wiphy, bss);
        memcpy(priv->cfg_bssid, bss_info.bssid, ETH_ALEN);

        return 0;
}

/*
 * This function connects with a BSS.
 *
 * This function handles both Infra and Ad-Hoc modes. It also performs
 * validity checking on the provided parameters, disconnects from the
 * current BSS (if any), sets up the association/scan parameters,
 * including security settings, and performs specific SSID scan before
 * trying to connect.
 *
 * For Infra mode, the function returns failure if the specified SSID
 * is not found in scan table. However, for Ad-Hoc mode, it can create
 * the IBSS if it does not exist. On successful completion in either case,
 * the function notifies the CFG802.11 subsystem of the new BSS connection.
 */
static int
mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len, u8 *ssid,
                       u8 *bssid, int mode, struct ieee80211_channel *channel,
                       struct cfg80211_connect_params *sme, bool privacy)
{
        struct cfg80211_ssid req_ssid;
        int ret, auth_type = 0;
        struct cfg80211_bss *bss = NULL;
        u8 is_scanning_required = 0;

        memset(&req_ssid, 0, sizeof(struct cfg80211_ssid));

        req_ssid.ssid_len = ssid_len;
        if (ssid_len > IEEE80211_MAX_SSID_LEN) {
                dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
                return -EINVAL;
        }

        memcpy(req_ssid.ssid, ssid, ssid_len);
        if (!req_ssid.ssid_len || req_ssid.ssid[0] < 0x20) {
                dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
                return -EINVAL;
        }

        /* disconnect before try to associate */
        mwifiex_deauthenticate(priv, NULL);

        /* As this is new association, clear locally stored
         * keys and security related flags */
        priv->sec_info.wpa_enabled = false;
        priv->sec_info.wpa2_enabled = false;
        priv->wep_key_curr_index = 0;
        priv->sec_info.encryption_mode = 0;
        priv->sec_info.is_authtype_auto = 0;
        ret = mwifiex_set_encode(priv, NULL, NULL, 0, 0, NULL, 1);

        if (mode == NL80211_IFTYPE_ADHOC) {
                /* "privacy" is set only for ad-hoc mode */
                if (privacy) {
                        /*
                         * Keep WLAN_CIPHER_SUITE_WEP104 for now so that
                         * the firmware can find a matching network from the
                         * scan. The cfg80211 does not give us the encryption
                         * mode at this stage so just setting it to WEP here.
                         */
                        priv->sec_info.encryption_mode =
                                        WLAN_CIPHER_SUITE_WEP104;
                        priv->sec_info.authentication_mode =
                                        NL80211_AUTHTYPE_OPEN_SYSTEM;
                }

                goto done;
        }

        /* Now handle infra mode. "sme" is valid for infra mode only */
        if (sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
                auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
                priv->sec_info.is_authtype_auto = 1;
        } else {
                auth_type = sme->auth_type;
        }

        if (sme->crypto.n_ciphers_pairwise) {
                priv->sec_info.encryption_mode =
                                                sme->crypto.ciphers_pairwise[0];
                priv->sec_info.authentication_mode = auth_type;
        }

        if (sme->crypto.cipher_group) {
                priv->sec_info.encryption_mode = sme->crypto.cipher_group;
                priv->sec_info.authentication_mode = auth_type;
        }
        if (sme->ie)
                ret = mwifiex_set_gen_ie(priv, sme->ie, sme->ie_len);

        if (sme->key) {
                if (mwifiex_is_alg_wep(priv->sec_info.encryption_mode)) {
                        dev_dbg(priv->adapter->dev,
                                "info: setting wep encryption"
                                " with key len %d\n", sme->key_len);
                        priv->wep_key_curr_index = sme->key_idx;
                        ret = mwifiex_set_encode(priv, NULL, sme->key,
                                                 sme->key_len, sme->key_idx,
                                                 NULL, 0);
                }
        }
done:
        /*
         * Scan entries are valid for some time (15 sec). So we can save one
         * active scan time if we just try cfg80211_get_bss first. If it fails
         * then request scan and cfg80211_get_bss() again for final output.
         */
        while (1) {
                if (is_scanning_required) {
                        /* Do specific SSID scanning */
                        if (mwifiex_request_scan(priv, &req_ssid)) {
                                dev_err(priv->adapter->dev, "scan error\n");
                                return -EFAULT;
                        }
                }

                /* Find the BSS we want using available scan results */
                if (mode == NL80211_IFTYPE_ADHOC)
                        bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
                                               bssid, ssid, ssid_len,
                                               WLAN_CAPABILITY_IBSS,
                                               WLAN_CAPABILITY_IBSS);
                else
                        bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
                                               bssid, ssid, ssid_len,
                                               WLAN_CAPABILITY_ESS,
                                               WLAN_CAPABILITY_ESS);

                if (!bss) {
                        if (is_scanning_required) {
                                dev_warn(priv->adapter->dev,
                                         "assoc: requested bss not found in scan results\n");
                                break;
                        }
                        is_scanning_required = 1;
                } else {
                        dev_dbg(priv->adapter->dev,
                                "info: trying to associate to '%s' bssid %pM\n",
                                (char *) req_ssid.ssid, bss->bssid);
                        memcpy(&priv->cfg_bssid, bss->bssid, ETH_ALEN);
                        break;
                }
        }

        ret = mwifiex_bss_start(priv, bss, &req_ssid);
        if (ret)
                return ret;

        if (mode == NL80211_IFTYPE_ADHOC) {
                /* Inform the BSS information to kernel, otherwise
                 * kernel will give a panic after successful assoc */
                if (mwifiex_cfg80211_inform_ibss_bss(priv))
                        return -EFAULT;
        }

        return ret;
}

/*
 * CFG802.11 operation handler for association request.
 *
 * This function does not work when the current mode is set to Ad-Hoc, or
 * when there is already an association procedure going on. The given BSS
 * information is used to associate.
 */
static int
mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
                         struct cfg80211_connect_params *sme)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
        int ret;

        if (GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_STA) {
                wiphy_err(wiphy,
                          "%s: reject infra assoc request in non-STA role\n",
                          dev->name);
                return -EINVAL;
        }

        wiphy_dbg(wiphy, "info: Trying to associate to %s and bssid %pM\n",
                  (char *) sme->ssid, sme->bssid);

        ret = mwifiex_cfg80211_assoc(priv, sme->ssid_len, sme->ssid, sme->bssid,
                                     priv->bss_mode, sme->channel, sme, 0);
        if (!ret) {
                cfg80211_connect_result(priv->netdev, priv->cfg_bssid, NULL, 0,
                                        NULL, 0, WLAN_STATUS_SUCCESS,
                                        GFP_KERNEL);
                dev_dbg(priv->adapter->dev,
                        "info: associated to bssid %pM successfully\n",
                        priv->cfg_bssid);
        } else {
                dev_dbg(priv->adapter->dev,
                        "info: association to bssid %pM failed\n",
                        priv->cfg_bssid);
                memset(priv->cfg_bssid, 0, ETH_ALEN);

                if (ret > 0)
                        cfg80211_connect_result(priv->netdev, priv->cfg_bssid,
                                                NULL, 0, NULL, 0, ret,
                                                GFP_KERNEL);
                else
                        cfg80211_connect_result(priv->netdev, priv->cfg_bssid,
                                                NULL, 0, NULL, 0,
                                                WLAN_STATUS_UNSPECIFIED_FAILURE,
                                                GFP_KERNEL);
        }

        return 0;
}

/*
 * This function sets following parameters for ibss network.
 *  -  channel
 *  -  start band
 *  -  11n flag
 *  -  secondary channel offset
 */
static int mwifiex_set_ibss_params(struct mwifiex_private *priv,
                                   struct cfg80211_ibss_params *params)
{
        struct wiphy *wiphy = priv->wdev->wiphy;
        struct mwifiex_adapter *adapter = priv->adapter;
        int index = 0, i;
        u8 config_bands = 0;

        if (params->chandef.chan->band == IEEE80211_BAND_2GHZ) {
                if (!params->basic_rates) {
                        config_bands = BAND_B | BAND_G;
                } else {
                        for (i = 0; i < mwifiex_band_2ghz.n_bitrates; i++) {
                                /*
                                 * Rates below 6 Mbps in the table are CCK
                                 * rates; 802.11b and from 6 they are OFDM;
                                 * 802.11G
                                 */
                                if (mwifiex_rates[i].bitrate == 60) {
                                        index = 1 << i;
                                        break;
                                }
                        }

                        if (params->basic_rates < index) {
                                config_bands = BAND_B;
                        } else {
                                config_bands = BAND_G;
                                if (params->basic_rates % index)
                                        config_bands |= BAND_B;
                        }
                }

                if (cfg80211_get_chandef_type(&params->chandef) !=
                                                NL80211_CHAN_NO_HT)
                        config_bands |= BAND_G | BAND_GN;
        } else {
                if (cfg80211_get_chandef_type(&params->chandef) ==
                                                NL80211_CHAN_NO_HT)
                        config_bands = BAND_A;
                else
                        config_bands = BAND_AN | BAND_A;
        }

        if (!((config_bands | adapter->fw_bands) & ~adapter->fw_bands)) {
                adapter->config_bands = config_bands;
                adapter->adhoc_start_band = config_bands;

                if ((config_bands & BAND_GN) || (config_bands & BAND_AN))
                        adapter->adhoc_11n_enabled = true;
                else
                        adapter->adhoc_11n_enabled = false;
        }

        adapter->sec_chan_offset =
                mwifiex_chan_type_to_sec_chan_offset(
                        cfg80211_get_chandef_type(&params->chandef));
        priv->adhoc_channel = ieee80211_frequency_to_channel(
                                params->chandef.chan->center_freq);

        wiphy_dbg(wiphy, "info: set ibss band %d, chan %d, chan offset %d\n",
                  config_bands, priv->adhoc_channel, adapter->sec_chan_offset);

        return 0;
}

/*
 * CFG802.11 operation handler to join an IBSS.
 *
 * This function does not work in any mode other than Ad-Hoc, or if
 * a join operation is already in progress.
 */
static int
mwifiex_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
                           struct cfg80211_ibss_params *params)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
        int ret = 0;

        if (priv->bss_mode != NL80211_IFTYPE_ADHOC) {
                wiphy_err(wiphy, "request to join ibss received "
                                "when station is not in ibss mode\n");
                goto done;
        }

        wiphy_dbg(wiphy, "info: trying to join to %s and bssid %pM\n",
                  (char *) params->ssid, params->bssid);

        mwifiex_set_ibss_params(priv, params);

        ret = mwifiex_cfg80211_assoc(priv, params->ssid_len, params->ssid,
                                     params->bssid, priv->bss_mode,
                                     params->chandef.chan, NULL,
                                     params->privacy);
done:
        if (!ret) {
                cfg80211_ibss_joined(priv->netdev, priv->cfg_bssid, GFP_KERNEL);
                dev_dbg(priv->adapter->dev,
                        "info: joined/created adhoc network with bssid"
                        " %pM successfully\n", priv->cfg_bssid);
        } else {
                dev_dbg(priv->adapter->dev,
                        "info: failed creating/joining adhoc network\n");
        }

        return ret;
}

/*
 * CFG802.11 operation handler to leave an IBSS.
 *
 * This function does not work if a leave operation is
 * already in progress.
 */
static int
mwifiex_cfg80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

        wiphy_dbg(wiphy, "info: disconnecting from essid %pM\n",
                  priv->cfg_bssid);
        if (mwifiex_deauthenticate(priv, NULL))
                return -EFAULT;

        memset(priv->cfg_bssid, 0, ETH_ALEN);

        return 0;
}

/*
 * CFG802.11 operation handler for scan request.
 *
 * This function issues a scan request to the firmware based upon
 * the user specified scan configuration. On successfull completion,
 * it also informs the results.
 */
static int
mwifiex_cfg80211_scan(struct wiphy *wiphy,
                      struct cfg80211_scan_request *request)
{
        struct net_device *dev = request->wdev->netdev;
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
        int i, offset, ret;
        struct ieee80211_channel *chan;
        struct ieee_types_header *ie;
        struct mwifiex_user_scan_cfg *user_scan_cfg;

        wiphy_dbg(wiphy, "info: received scan request on %s\n", dev->name);

        if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
            atomic_read(&priv->wmm.tx_pkts_queued) >=
            MWIFIEX_MIN_TX_PENDING_TO_CANCEL_SCAN) {
                dev_dbg(priv->adapter->dev, "scan rejected due to traffic\n");
                return -EBUSY;
        }

        /* Block scan request if scan operation or scan cleanup when interface
         * is disabled is in process
         */
        if (priv->scan_request || priv->scan_aborting) {
                dev_err(priv->adapter->dev, "cmd: Scan already in process..\n");
                return -EBUSY;
        }

        user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL);
        if (!user_scan_cfg)
                return -ENOMEM;

        priv->scan_request = request;

        user_scan_cfg->num_ssids = request->n_ssids;
        user_scan_cfg->ssid_list = request->ssids;

        if (request->ie && request->ie_len) {
                offset = 0;
                for (i = 0; i < MWIFIEX_MAX_VSIE_NUM; i++) {
                        if (priv->vs_ie[i].mask != MWIFIEX_VSIE_MASK_CLEAR)
                                continue;
                        priv->vs_ie[i].mask = MWIFIEX_VSIE_MASK_SCAN;
                        ie = (struct ieee_types_header *)(request->ie + offset);
                        memcpy(&priv->vs_ie[i].ie, ie, sizeof(*ie) + ie->len);
                        offset += sizeof(*ie) + ie->len;

                        if (offset >= request->ie_len)
                                break;
                }
        }

        for (i = 0; i < min_t(u32, request->n_channels,
                              MWIFIEX_USER_SCAN_CHAN_MAX); i++) {
                chan = request->channels[i];
                user_scan_cfg->chan_list[i].chan_number = chan->hw_value;
                user_scan_cfg->chan_list[i].radio_type = chan->band;

                if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
                        user_scan_cfg->chan_list[i].scan_type =
                                                MWIFIEX_SCAN_TYPE_PASSIVE;
                else
                        user_scan_cfg->chan_list[i].scan_type =
                                                MWIFIEX_SCAN_TYPE_ACTIVE;

                user_scan_cfg->chan_list[i].scan_time = 0;
        }

        ret = mwifiex_scan_networks(priv, user_scan_cfg);
        kfree(user_scan_cfg);
        if (ret) {
                dev_err(priv->adapter->dev, "scan failed: %d\n", ret);
                priv->scan_aborting = false;
                priv->scan_request = NULL;
                return ret;
        }

        if (request->ie && request->ie_len) {
                for (i = 0; i < MWIFIEX_MAX_VSIE_NUM; i++) {
                        if (priv->vs_ie[i].mask == MWIFIEX_VSIE_MASK_SCAN) {
                                priv->vs_ie[i].mask = MWIFIEX_VSIE_MASK_CLEAR;
                                memset(&priv->vs_ie[i].ie, 0,
                                       MWIFIEX_MAX_VSIE_LEN);
                        }
                }
        }
        return 0;
}

static void mwifiex_setup_vht_caps(struct ieee80211_sta_vht_cap *vht_info,
                                   struct mwifiex_private *priv)
{
        struct mwifiex_adapter *adapter = priv->adapter;

        vht_info->vht_supported = true;

        vht_info->cap = adapter->hw_dot_11ac_dev_cap;
        /* Update MCS support for VHT */
        vht_info->vht_mcs.rx_mcs_map = cpu_to_le16(
                                adapter->hw_dot_11ac_mcs_support & 0xFFFF);
        vht_info->vht_mcs.rx_highest = 0;
        vht_info->vht_mcs.tx_mcs_map = cpu_to_le16(
                                adapter->hw_dot_11ac_mcs_support >> 16);
        vht_info->vht_mcs.tx_highest = 0;
}

/*
 * This function sets up the CFG802.11 specific HT capability fields
 * with default values.
 *
 * The following default values are set -
 *      - HT Supported = True
 *      - Maximum AMPDU length factor = IEEE80211_HT_MAX_AMPDU_64K
 *      - Minimum AMPDU spacing = IEEE80211_HT_MPDU_DENSITY_NONE
 *      - HT Capabilities supported by firmware
 *      - MCS information, Rx mask = 0xff
 *      - MCD information, Tx parameters = IEEE80211_HT_MCS_TX_DEFINED (0x01)
 */
static void
mwifiex_setup_ht_caps(struct ieee80211_sta_ht_cap *ht_info,
                      struct mwifiex_private *priv)
{
        int rx_mcs_supp;
        struct ieee80211_mcs_info mcs_set;
        u8 *mcs = (u8 *)&mcs_set;
        struct mwifiex_adapter *adapter = priv->adapter;

        ht_info->ht_supported = true;
        ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
        ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;

        memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));

        /* Fill HT capability information */
        if (ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
                ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
        else
                ht_info->cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;

        if (ISSUPP_SHORTGI20(adapter->hw_dot_11n_dev_cap))
                ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
        else
                ht_info->cap &= ~IEEE80211_HT_CAP_SGI_20;

        if (ISSUPP_SHORTGI40(adapter->hw_dot_11n_dev_cap))
                ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
        else
                ht_info->cap &= ~IEEE80211_HT_CAP_SGI_40;

        if (ISSUPP_RXSTBC(adapter->hw_dot_11n_dev_cap))
                ht_info->cap |= 1 << IEEE80211_HT_CAP_RX_STBC_SHIFT;
        else
                ht_info->cap &= ~(3 << IEEE80211_HT_CAP_RX_STBC_SHIFT);

        if (ISSUPP_TXSTBC(adapter->hw_dot_11n_dev_cap))
                ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
        else
                ht_info->cap &= ~IEEE80211_HT_CAP_TX_STBC;

        if (ISSUPP_GREENFIELD(adapter->hw_dot_11n_dev_cap))
                ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
        else
                ht_info->cap &= ~IEEE80211_HT_CAP_GRN_FLD;

        if (ISENABLED_40MHZ_INTOLERANT(adapter->hw_dot_11n_dev_cap))
                ht_info->cap |= IEEE80211_HT_CAP_40MHZ_INTOLERANT;
        else
                ht_info->cap &= ~IEEE80211_HT_CAP_40MHZ_INTOLERANT;

        if (ISSUPP_RXLDPC(adapter->hw_dot_11n_dev_cap))
                ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
        else
                ht_info->cap &= ~IEEE80211_HT_CAP_LDPC_CODING;

        ht_info->cap &= ~IEEE80211_HT_CAP_MAX_AMSDU;
        ht_info->cap |= IEEE80211_HT_CAP_SM_PS;

        rx_mcs_supp = GET_RXMCSSUPP(adapter->hw_dev_mcs_support);
        /* Set MCS for 1x1 */
        memset(mcs, 0xff, rx_mcs_supp);
        /* Clear all the other values */
        memset(&mcs[rx_mcs_supp], 0,
               sizeof(struct ieee80211_mcs_info) - rx_mcs_supp);
        if (priv->bss_mode == NL80211_IFTYPE_STATION ||
            ISSUPP_CHANWIDTH40(adapter->hw_dot_11n_dev_cap))
                /* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
                SETHT_MCS32(mcs_set.rx_mask);

        memcpy((u8 *) &ht_info->mcs, mcs, sizeof(struct ieee80211_mcs_info));

        ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
}

/*
 *  create a new virtual interface with the given name
 */
struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
                                              const char *name,
                                              enum nl80211_iftype type,
                                              u32 *flags,
                                              struct vif_params *params)
{
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);
        struct mwifiex_private *priv;
        struct net_device *dev;
        void *mdev_priv;
        struct wireless_dev *wdev;

        if (!adapter)
                return ERR_PTR(-EFAULT);

        switch (type) {
        case NL80211_IFTYPE_UNSPECIFIED:
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_ADHOC:
                priv = adapter->priv[MWIFIEX_BSS_TYPE_STA];
                if (priv->bss_mode) {
                        wiphy_err(wiphy,
                                  "cannot create multiple sta/adhoc ifaces\n");
                        return ERR_PTR(-EINVAL);
                }

                wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
                if (!wdev)
                        return ERR_PTR(-ENOMEM);

                wdev->wiphy = wiphy;
                priv->wdev = wdev;
                wdev->iftype = NL80211_IFTYPE_STATION;

                if (type == NL80211_IFTYPE_UNSPECIFIED)
                        priv->bss_mode = NL80211_IFTYPE_STATION;
                else
                        priv->bss_mode = type;

                priv->bss_type = MWIFIEX_BSS_TYPE_STA;
                priv->frame_type = MWIFIEX_DATA_FRAME_TYPE_ETH_II;
                priv->bss_priority = 0;
                priv->bss_role = MWIFIEX_BSS_ROLE_STA;
                priv->bss_num = 0;

                break;
        case NL80211_IFTYPE_AP:
                priv = adapter->priv[MWIFIEX_BSS_TYPE_UAP];

                if (priv->bss_mode) {
                        wiphy_err(wiphy, "Can't create multiple AP interfaces");
                        return ERR_PTR(-EINVAL);
                }

                wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
                if (!wdev)
                        return ERR_PTR(-ENOMEM);

                priv->wdev = wdev;
                wdev->wiphy = wiphy;
                wdev->iftype = NL80211_IFTYPE_AP;

                priv->bss_type = MWIFIEX_BSS_TYPE_UAP;
                priv->frame_type = MWIFIEX_DATA_FRAME_TYPE_ETH_II;
                priv->bss_priority = 0;
                priv->bss_role = MWIFIEX_BSS_ROLE_UAP;
                priv->bss_started = 0;
                priv->bss_num = 0;
                priv->bss_mode = type;

                break;
        case NL80211_IFTYPE_P2P_CLIENT:
                priv = adapter->priv[MWIFIEX_BSS_TYPE_P2P];

                if (priv->bss_mode) {
                        wiphy_err(wiphy, "Can't create multiple P2P ifaces");
                        return ERR_PTR(-EINVAL);
                }

                wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
                if (!wdev)
                        return ERR_PTR(-ENOMEM);

                priv->wdev = wdev;
                wdev->wiphy = wiphy;

                /* At start-up, wpa_supplicant tries to change the interface
                 * to NL80211_IFTYPE_STATION if it is not managed mode.
                 */
                wdev->iftype = NL80211_IFTYPE_P2P_CLIENT;
                priv->bss_mode = NL80211_IFTYPE_P2P_CLIENT;

                /* Setting bss_type to P2P tells firmware that this interface
                 * is receiving P2P peers found during find phase and doing
                 * action frame handshake.
                 */
                priv->bss_type = MWIFIEX_BSS_TYPE_P2P;

                priv->frame_type = MWIFIEX_DATA_FRAME_TYPE_ETH_II;
                priv->bss_priority = MWIFIEX_BSS_ROLE_STA;
                priv->bss_role = MWIFIEX_BSS_ROLE_STA;
                priv->bss_started = 0;
                priv->bss_num = 0;

                if (mwifiex_cfg80211_init_p2p_client(priv))
                        return ERR_PTR(-EFAULT);

                break;
        default:
                wiphy_err(wiphy, "type not supported\n");
                return ERR_PTR(-EINVAL);
        }

        dev = alloc_netdev_mqs(sizeof(struct mwifiex_private *), name,
                               ether_setup, IEEE80211_NUM_ACS, 1);
        if (!dev) {
                wiphy_err(wiphy, "no memory available for netdevice\n");
                priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
                return ERR_PTR(-ENOMEM);
        }

        mwifiex_init_priv_params(priv, dev);
        priv->netdev = dev;

        mwifiex_setup_ht_caps(&wiphy->bands[IEEE80211_BAND_2GHZ]->ht_cap, priv);
        if (adapter->is_hw_11ac_capable)
                mwifiex_setup_vht_caps(
                        &wiphy->bands[IEEE80211_BAND_2GHZ]->vht_cap, priv);

        if (adapter->config_bands & BAND_A)
                mwifiex_setup_ht_caps(
                        &wiphy->bands[IEEE80211_BAND_5GHZ]->ht_cap, priv);

        if ((adapter->config_bands & BAND_A) && adapter->is_hw_11ac_capable)
                mwifiex_setup_vht_caps(
                        &wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap, priv);

        dev_net_set(dev, wiphy_net(wiphy));
        dev->ieee80211_ptr = priv->wdev;
        dev->ieee80211_ptr->iftype = priv->bss_mode;
        memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
        SET_NETDEV_DEV(dev, wiphy_dev(wiphy));

        dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
        dev->watchdog_timeo = MWIFIEX_DEFAULT_WATCHDOG_TIMEOUT;
        dev->hard_header_len += MWIFIEX_MIN_DATA_HEADER_LEN;
        dev->ethtool_ops = &mwifiex_ethtool_ops;

        mdev_priv = netdev_priv(dev);
        *((unsigned long *) mdev_priv) = (unsigned long) priv;

        SET_NETDEV_DEV(dev, adapter->dev);

        /* Register network device */
        if (register_netdevice(dev)) {
                wiphy_err(wiphy, "cannot register virtual network device\n");
                free_netdev(dev);
                priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
                return ERR_PTR(-EFAULT);
        }

        sema_init(&priv->async_sem, 1);

        dev_dbg(adapter->dev, "info: %s: Marvell 802.11 Adapter\n", dev->name);

#ifdef CONFIG_DEBUG_FS
        mwifiex_dev_debugfs_init(priv);
#endif
        return wdev;
}
EXPORT_SYMBOL_GPL(mwifiex_add_virtual_intf);

/*
 * del_virtual_intf: remove the virtual interface determined by dev
 */
int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct wireless_dev *wdev)
{
        struct mwifiex_private *priv = mwifiex_netdev_get_priv(wdev->netdev);

#ifdef CONFIG_DEBUG_FS
        mwifiex_dev_debugfs_remove(priv);
#endif

        mwifiex_stop_net_dev_queue(priv->netdev, priv->adapter);

        if (netif_carrier_ok(priv->netdev))
                netif_carrier_off(priv->netdev);

        if (wdev->netdev->reg_state == NETREG_REGISTERED)
                unregister_netdevice(wdev->netdev);

        /* Clear the priv in adapter */
        priv->netdev = NULL;

        priv->media_connected = false;

        priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;

        return 0;
}
EXPORT_SYMBOL_GPL(mwifiex_del_virtual_intf);

static bool
mwifiex_is_pattern_supported(struct cfg80211_pkt_pattern *pat, s8 *byte_seq,
                             u8 max_byte_seq)
{
        int j, k, valid_byte_cnt = 0;
        bool dont_care_byte = false;

        for (j = 0; j < DIV_ROUND_UP(pat->pattern_len, 8); j++) {
                for (k = 0; k < 8; k++) {
                        if (pat->mask[j] & 1 << k) {
                                memcpy(byte_seq + valid_byte_cnt,
                                       &pat->pattern[j * 8 + k], 1);
                                valid_byte_cnt++;
                                if (dont_care_byte)
                                        return false;
                        } else {
                                if (valid_byte_cnt)
                                        dont_care_byte = true;
                        }

                        if (valid_byte_cnt > max_byte_seq)
                                return false;
                }
        }

        byte_seq[max_byte_seq] = valid_byte_cnt;

        return true;
}

#ifdef CONFIG_PM
static int mwifiex_cfg80211_suspend(struct wiphy *wiphy,
                                    struct cfg80211_wowlan *wowlan)
{
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);
        struct mwifiex_ds_mef_cfg mef_cfg;
        struct mwifiex_mef_entry *mef_entry;
        int i, filt_num = 0, ret;
        bool first_pat = true;
        u8 byte_seq[MWIFIEX_MEF_MAX_BYTESEQ + 1];
        const u8 ipv4_mc_mac[] = {0x33, 0x33};
        const u8 ipv6_mc_mac[] = {0x01, 0x00, 0x5e};
        struct mwifiex_private *priv =
                        mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA);

        if (!wowlan) {
                dev_warn(adapter->dev, "None of the WOWLAN triggers enabled\n");
                return 0;
        }

        if (!priv->media_connected) {
                dev_warn(adapter->dev,
                         "Can not configure WOWLAN in disconnected state\n");
                return 0;
        }

        mef_entry = kzalloc(sizeof(*mef_entry), GFP_KERNEL);
        if (!mef_entry)
                return -ENOMEM;

        memset(&mef_cfg, 0, sizeof(mef_cfg));
        mef_cfg.num_entries = 1;
        mef_cfg.mef_entry = mef_entry;
        mef_entry->mode = MEF_MODE_HOST_SLEEP;
        mef_entry->action = MEF_ACTION_ALLOW_AND_WAKEUP_HOST;

        for (i = 0; i < wowlan->n_patterns; i++) {
                memset(byte_seq, 0, sizeof(byte_seq));
                if (!mwifiex_is_pattern_supported(&wowlan->patterns[i],
                                                  byte_seq,
                                                  MWIFIEX_MEF_MAX_BYTESEQ)) {
                        wiphy_err(wiphy, "Pattern not supported\n");
                        kfree(mef_entry);
                        return -EOPNOTSUPP;
                }

                if (!wowlan->patterns[i].pkt_offset) {
                        if (!(byte_seq[0] & 0x01) &&
                            (byte_seq[MWIFIEX_MEF_MAX_BYTESEQ] == 1)) {
                                mef_cfg.criteria |= MWIFIEX_CRITERIA_UNICAST;
                                continue;
                        } else if (is_broadcast_ether_addr(byte_seq)) {
                                mef_cfg.criteria |= MWIFIEX_CRITERIA_BROADCAST;
                                continue;
                        } else if ((!memcmp(byte_seq, ipv4_mc_mac, 2) &&
                                    (byte_seq[MWIFIEX_MEF_MAX_BYTESEQ] == 2)) ||
                                   (!memcmp(byte_seq, ipv6_mc_mac, 3) &&
                                    (byte_seq[MWIFIEX_MEF_MAX_BYTESEQ] == 3))) {
                                mef_cfg.criteria |= MWIFIEX_CRITERIA_MULTICAST;
                                continue;
                        }
                }

                mef_entry->filter[filt_num].repeat = 1;
                mef_entry->filter[filt_num].offset =
                                                wowlan->patterns[i].pkt_offset;
                memcpy(mef_entry->filter[filt_num].byte_seq, byte_seq,
                       sizeof(byte_seq));
                mef_entry->filter[filt_num].filt_type = TYPE_EQ;

                if (first_pat)
                        first_pat = false;
                else
                        mef_entry->filter[filt_num].filt_action = TYPE_AND;

                filt_num++;
        }

        if (wowlan->magic_pkt) {
                mef_cfg.criteria |= MWIFIEX_CRITERIA_UNICAST;
                mef_entry->filter[filt_num].repeat = 16;
                memcpy(mef_entry->filter[filt_num].byte_seq, priv->curr_addr,
                       ETH_ALEN);
                mef_entry->filter[filt_num].byte_seq[MWIFIEX_MEF_MAX_BYTESEQ] =
                                                                ETH_ALEN;
                mef_entry->filter[filt_num].offset = 14;
                mef_entry->filter[filt_num].filt_type = TYPE_EQ;
                if (filt_num)
                        mef_entry->filter[filt_num].filt_action = TYPE_OR;
        }

        if (!mef_cfg.criteria)
                mef_cfg.criteria = MWIFIEX_CRITERIA_BROADCAST |
                                   MWIFIEX_CRITERIA_UNICAST |
                                   MWIFIEX_CRITERIA_MULTICAST;

        ret =  mwifiex_send_cmd_sync(priv, HostCmd_CMD_MEF_CFG,
                                     HostCmd_ACT_GEN_SET, 0,
                                     &mef_cfg);

        kfree(mef_entry);
        return ret;
}

static int mwifiex_cfg80211_resume(struct wiphy *wiphy)
{
        return 0;
}

static void mwifiex_cfg80211_set_wakeup(struct wiphy *wiphy,
                                       bool enabled)
{
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);

        device_set_wakeup_enable(adapter->dev, enabled);
}
#endif

static int mwifiex_get_coalesce_pkt_type(u8 *byte_seq)
{
        const u8 ipv4_mc_mac[] = {0x33, 0x33};
        const u8 ipv6_mc_mac[] = {0x01, 0x00, 0x5e};
        const u8 bc_mac[] = {0xff, 0xff, 0xff, 0xff};

        if ((byte_seq[0] & 0x01) &&
            (byte_seq[MWIFIEX_COALESCE_MAX_BYTESEQ] == 1))
                return PACKET_TYPE_UNICAST;
        else if (!memcmp(byte_seq, bc_mac, 4))
                return PACKET_TYPE_BROADCAST;
        else if ((!memcmp(byte_seq, ipv4_mc_mac, 2) &&
                  byte_seq[MWIFIEX_COALESCE_MAX_BYTESEQ] == 2) ||
                 (!memcmp(byte_seq, ipv6_mc_mac, 3) &&
                  byte_seq[MWIFIEX_COALESCE_MAX_BYTESEQ] == 3))
                return PACKET_TYPE_MULTICAST;

        return 0;
}

static int
mwifiex_fill_coalesce_rule_info(struct mwifiex_private *priv,
                                struct cfg80211_coalesce_rules *crule,
                                struct mwifiex_coalesce_rule *mrule)
{
        u8 byte_seq[MWIFIEX_COALESCE_MAX_BYTESEQ + 1];
        struct filt_field_param *param;
        int i;

        mrule->max_coalescing_delay = crule->delay;

        param = mrule->params;

        for (i = 0; i < crule->n_patterns; i++) {
                memset(byte_seq, 0, sizeof(byte_seq));
                if (!mwifiex_is_pattern_supported(&crule->patterns[i],
                                                  byte_seq,
                                                MWIFIEX_COALESCE_MAX_BYTESEQ)) {
                        dev_err(priv->adapter->dev, "Pattern not supported\n");
                        return -EOPNOTSUPP;
                }

                if (!crule->patterns[i].pkt_offset) {
                        u8 pkt_type;

                        pkt_type = mwifiex_get_coalesce_pkt_type(byte_seq);
                        if (pkt_type && mrule->pkt_type) {
                                dev_err(priv->adapter->dev,
                                        "Multiple packet types not allowed\n");
                                return -EOPNOTSUPP;
                        } else if (pkt_type) {
                                mrule->pkt_type = pkt_type;
                                continue;
                        }
                }

                if (crule->condition == NL80211_COALESCE_CONDITION_MATCH)
                        param->operation = RECV_FILTER_MATCH_TYPE_EQ;
                else
                        param->operation = RECV_FILTER_MATCH_TYPE_NE;

                param->operand_len = byte_seq[MWIFIEX_COALESCE_MAX_BYTESEQ];
                memcpy(param->operand_byte_stream, byte_seq,
                       param->operand_len);
                param->offset = crule->patterns[i].pkt_offset;
                param++;

                mrule->num_of_fields++;
        }

        if (!mrule->pkt_type) {
                dev_err(priv->adapter->dev,
                        "Packet type can not be determined\n");
                return -EOPNOTSUPP;
        }

        return 0;
}

static int mwifiex_cfg80211_set_coalesce(struct wiphy *wiphy,
                                         struct cfg80211_coalesce *coalesce)
{
        struct mwifiex_adapter *adapter = mwifiex_cfg80211_get_adapter(wiphy);
        int i, ret;
        struct mwifiex_ds_coalesce_cfg coalesce_cfg;
        struct mwifiex_private *priv =
                        mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA);

        memset(&coalesce_cfg, 0, sizeof(coalesce_cfg));
        if (!coalesce) {
                dev_dbg(adapter->dev,
                        "Disable coalesce and reset all previous rules\n");
                return mwifiex_send_cmd_sync(priv, HostCmd_CMD_COALESCE_CFG,
                                             HostCmd_ACT_GEN_SET, 0,
                                             &coalesce_cfg);
        }

        coalesce_cfg.num_of_rules = coalesce->n_rules;
        for (i = 0; i < coalesce->n_rules; i++) {
                ret = mwifiex_fill_coalesce_rule_info(priv, &coalesce->rules[i],
                                                      &coalesce_cfg.rule[i]);
                if (ret) {
                        dev_err(priv->adapter->dev,
                                "Recheck the patterns provided for rule %d\n",
                                i + 1);
                        return ret;
                }
        }

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_COALESCE_CFG,
                                     HostCmd_ACT_GEN_SET, 0, &coalesce_cfg);
}

/* station cfg80211 operations */
static struct cfg80211_ops mwifiex_cfg80211_ops = {
        .add_virtual_intf = mwifiex_add_virtual_intf,
        .del_virtual_intf = mwifiex_del_virtual_intf,
        .change_virtual_intf = mwifiex_cfg80211_change_virtual_intf,
        .scan = mwifiex_cfg80211_scan,
        .connect = mwifiex_cfg80211_connect,
        .disconnect = mwifiex_cfg80211_disconnect,
        .get_station = mwifiex_cfg80211_get_station,
        .dump_station = mwifiex_cfg80211_dump_station,
        .set_wiphy_params = mwifiex_cfg80211_set_wiphy_params,
        .join_ibss = mwifiex_cfg80211_join_ibss,
        .leave_ibss = mwifiex_cfg80211_leave_ibss,
        .add_key = mwifiex_cfg80211_add_key,
        .del_key = mwifiex_cfg80211_del_key,
        .mgmt_tx = mwifiex_cfg80211_mgmt_tx,
        .mgmt_frame_register = mwifiex_cfg80211_mgmt_frame_register,
        .remain_on_channel = mwifiex_cfg80211_remain_on_channel,
        .cancel_remain_on_channel = mwifiex_cfg80211_cancel_remain_on_channel,
        .set_default_key = mwifiex_cfg80211_set_default_key,
        .set_power_mgmt = mwifiex_cfg80211_set_power_mgmt,
        .set_tx_power = mwifiex_cfg80211_set_tx_power,
        .set_bitrate_mask = mwifiex_cfg80211_set_bitrate_mask,
        .start_ap = mwifiex_cfg80211_start_ap,
        .stop_ap = mwifiex_cfg80211_stop_ap,
        .change_beacon = mwifiex_cfg80211_change_beacon,
        .set_cqm_rssi_config = mwifiex_cfg80211_set_cqm_rssi_config,
        .set_antenna = mwifiex_cfg80211_set_antenna,
        .del_station = mwifiex_cfg80211_del_station,
#ifdef CONFIG_PM
        .suspend = mwifiex_cfg80211_suspend,
        .resume = mwifiex_cfg80211_resume,
        .set_wakeup = mwifiex_cfg80211_set_wakeup,
#endif
        .set_coalesce = mwifiex_cfg80211_set_coalesce,
};

#ifdef CONFIG_PM
static const struct wiphy_wowlan_support mwifiex_wowlan_support = {
        .flags = WIPHY_WOWLAN_MAGIC_PKT,
        .n_patterns = MWIFIEX_MEF_MAX_FILTERS,
        .pattern_min_len = 1,
        .pattern_max_len = MWIFIEX_MAX_PATTERN_LEN,
        .max_pkt_offset = MWIFIEX_MAX_OFFSET_LEN,
};
#endif

static bool mwifiex_is_valid_alpha2(const char *alpha2)
{
        if (!alpha2 || strlen(alpha2) != 2)
                return false;

        if (isalpha(alpha2[0]) && isalpha(alpha2[1]))
                return true;

        return false;
}

static const struct wiphy_coalesce_support mwifiex_coalesce_support = {
        .n_rules = MWIFIEX_COALESCE_MAX_RULES,
        .max_delay = MWIFIEX_MAX_COALESCING_DELAY,
        .n_patterns = MWIFIEX_COALESCE_MAX_FILTERS,
        .pattern_min_len = 1,
        .pattern_max_len = MWIFIEX_MAX_PATTERN_LEN,
        .max_pkt_offset = MWIFIEX_MAX_OFFSET_LEN,
};

/*
 * This function registers the device with CFG802.11 subsystem.
 *
 * The function creates the wireless device/wiphy, populates it with
 * default parameters and handler function pointers, and finally
 * registers the device.
 */

int mwifiex_register_cfg80211(struct mwifiex_adapter *adapter)
{
        int ret;
        void *wdev_priv;
        struct wiphy *wiphy;
        struct mwifiex_private *priv = adapter->priv[MWIFIEX_BSS_TYPE_STA];
        u8 *country_code;

        /* create a new wiphy for use with cfg80211 */
        wiphy = wiphy_new(&mwifiex_cfg80211_ops,
                          sizeof(struct mwifiex_adapter *));
        if (!wiphy) {
                dev_err(adapter->dev, "%s: creating new wiphy\n", __func__);
                return -ENOMEM;
        }
        wiphy->max_scan_ssids = MWIFIEX_MAX_SSID_LIST_LENGTH;
        wiphy->max_scan_ie_len = MWIFIEX_MAX_VSIE_LEN;
        wiphy->mgmt_stypes = mwifiex_mgmt_stypes;
        wiphy->max_remain_on_channel_duration = 5000;
        wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
                                 BIT(NL80211_IFTYPE_ADHOC) |
                                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
                                 BIT(NL80211_IFTYPE_P2P_GO) |
                                 BIT(NL80211_IFTYPE_AP);

        wiphy->bands[IEEE80211_BAND_2GHZ] = &mwifiex_band_2ghz;
        if (adapter->config_bands & BAND_A)
                wiphy->bands[IEEE80211_BAND_5GHZ] = &mwifiex_band_5ghz;
        else
                wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;

        wiphy->iface_combinations = &mwifiex_iface_comb_ap_sta;
        wiphy->n_iface_combinations = 1;

        /* Initialize cipher suits */
        wiphy->cipher_suites = mwifiex_cipher_suites;
        wiphy->n_cipher_suites = ARRAY_SIZE(mwifiex_cipher_suites);

        memcpy(wiphy->perm_addr, priv->curr_addr, ETH_ALEN);
        wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
        wiphy->flags |= WIPHY_FLAG_HAVE_AP_SME |
                        WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD |
                        WIPHY_FLAG_AP_UAPSD |
                        WIPHY_FLAG_CUSTOM_REGULATORY |
                        WIPHY_FLAG_STRICT_REGULATORY |
                        WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;

        wiphy_apply_custom_regulatory(wiphy, &mwifiex_world_regdom_custom);

#ifdef CONFIG_PM
        wiphy->wowlan = &mwifiex_wowlan_support;
#endif

        wiphy->coalesce = &mwifiex_coalesce_support;

        wiphy->probe_resp_offload = NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS |
                                    NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 |
                                    NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P;

        wiphy->available_antennas_tx = BIT(adapter->number_of_antenna) - 1;
        wiphy->available_antennas_rx = BIT(adapter->number_of_antenna) - 1;

        wiphy->features |= NL80211_FEATURE_HT_IBSS |
                           NL80211_FEATURE_INACTIVITY_TIMER |
                           NL80211_FEATURE_LOW_PRIORITY_SCAN;

        /* Reserve space for mwifiex specific private data for BSS */
        wiphy->bss_priv_size = sizeof(struct mwifiex_bss_priv);

        wiphy->reg_notifier = mwifiex_reg_notifier;

        /* Set struct mwifiex_adapter pointer in wiphy_priv */
        wdev_priv = wiphy_priv(wiphy);
        *(unsigned long *)wdev_priv = (unsigned long)adapter;

        set_wiphy_dev(wiphy, priv->adapter->dev);

        ret = wiphy_register(wiphy);
        if (ret < 0) {
                dev_err(adapter->dev,
                        "%s: wiphy_register failed: %d\n", __func__, ret);
                wiphy_free(wiphy);
                return ret;
        }

        if (reg_alpha2 && mwifiex_is_valid_alpha2(reg_alpha2)) {
                wiphy_info(wiphy, "driver hint alpha2: %2.2s\n", reg_alpha2);
                regulatory_hint(wiphy, reg_alpha2);
        } else {
                country_code = mwifiex_11d_code_2_region(adapter->region_code);
                if (country_code)
                        wiphy_info(wiphy, "ignoring F/W country code %2.2s\n",
                                   country_code);
        }

        adapter->wiphy = wiphy;
        return ret;
}