mwifiex: use correct firmware command to get power limits

[mirror_ubuntu-jammy-kernel.git] / drivers / net / wireless / mwifiex / sta_cmdresp.c

/*
 * Marvell Wireless LAN device driver: station command response handling
 *
 * 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 "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"
#include "11n.h"


/*
 * This function handles the command response error case.
 *
 * For scan response error, the function cancels all the pending
 * scan commands and generates an event to inform the applications
 * of the scan completion.
 *
 * For Power Save command failure, we do not retry enter PS
 * command in case of Ad-hoc mode.
 *
 * For all other response errors, the current command buffer is freed
 * and returned to the free command queue.
 */
static void
mwifiex_process_cmdresp_error(struct mwifiex_private *priv,
                              struct host_cmd_ds_command *resp)
{
        struct cmd_ctrl_node *cmd_node = NULL, *tmp_node;
        struct mwifiex_adapter *adapter = priv->adapter;
        struct host_cmd_ds_802_11_ps_mode_enh *pm;
        unsigned long flags;

        dev_err(adapter->dev, "CMD_RESP: cmd %#x error, result=%#x\n",
                resp->command, resp->result);

        if (adapter->curr_cmd->wait_q_enabled)
                adapter->cmd_wait_q.status = -1;

        switch (le16_to_cpu(resp->command)) {
        case HostCmd_CMD_802_11_PS_MODE_ENH:
                pm = &resp->params.psmode_enh;
                dev_err(adapter->dev,
                        "PS_MODE_ENH cmd failed: result=0x%x action=0x%X\n",
                        resp->result, le16_to_cpu(pm->action));
                /* We do not re-try enter-ps command in ad-hoc mode. */
                if (le16_to_cpu(pm->action) == EN_AUTO_PS &&
                    (le16_to_cpu(pm->params.ps_bitmap) & BITMAP_STA_PS) &&
                    priv->bss_mode == NL80211_IFTYPE_ADHOC)
                        adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;

                break;
        case HostCmd_CMD_802_11_SCAN:
                /* Cancel all pending scan command */
                spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
                list_for_each_entry_safe(cmd_node, tmp_node,
                                         &adapter->scan_pending_q, list) {
                        list_del(&cmd_node->list);
                        spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
                                               flags);
                        mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
                        spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
                }
                spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);

                spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
                adapter->scan_processing = false;
                spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
                if (priv->report_scan_result)
                        priv->report_scan_result = false;
                if (priv->scan_pending_on_block) {
                        priv->scan_pending_on_block = false;
                        up(&priv->async_sem);
                }
                break;

        case HostCmd_CMD_MAC_CONTROL:
                break;

        default:
                break;
        }
        /* Handling errors here */
        mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);

        spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
        adapter->curr_cmd = NULL;
        spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
}

/*
 * This function handles the command response of get RSSI info.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the following parameters in driver -
 *      - Last data and beacon RSSI value
 *      - Average data and beacon RSSI value
 *      - Last data and beacon NF value
 *      - Average data and beacon NF value
 *
 * The parameters are send to the application as well, along with
 * calculated SNR values.
 */
static int mwifiex_ret_802_11_rssi_info(struct mwifiex_private *priv,
                                        struct host_cmd_ds_command *resp)
{
        struct host_cmd_ds_802_11_rssi_info_rsp *rssi_info_rsp =
                                                &resp->params.rssi_info_rsp;
        struct mwifiex_ds_misc_subsc_evt subsc_evt;

        priv->data_rssi_last = le16_to_cpu(rssi_info_rsp->data_rssi_last);
        priv->data_nf_last = le16_to_cpu(rssi_info_rsp->data_nf_last);

        priv->data_rssi_avg = le16_to_cpu(rssi_info_rsp->data_rssi_avg);
        priv->data_nf_avg = le16_to_cpu(rssi_info_rsp->data_nf_avg);

        priv->bcn_rssi_last = le16_to_cpu(rssi_info_rsp->bcn_rssi_last);
        priv->bcn_nf_last = le16_to_cpu(rssi_info_rsp->bcn_nf_last);

        priv->bcn_rssi_avg = le16_to_cpu(rssi_info_rsp->bcn_rssi_avg);
        priv->bcn_nf_avg = le16_to_cpu(rssi_info_rsp->bcn_nf_avg);

        if (priv->subsc_evt_rssi_state == EVENT_HANDLED)
                return 0;

        /* Resubscribe low and high rssi events with new thresholds */
        memset(&subsc_evt, 0x00, sizeof(struct mwifiex_ds_misc_subsc_evt));
        subsc_evt.events = BITMASK_BCN_RSSI_LOW | BITMASK_BCN_RSSI_HIGH;
        subsc_evt.action = HostCmd_ACT_BITWISE_SET;
        if (priv->subsc_evt_rssi_state == RSSI_LOW_RECVD) {
                subsc_evt.bcn_l_rssi_cfg.abs_value = abs(priv->bcn_rssi_avg -
                                priv->cqm_rssi_hyst);
                subsc_evt.bcn_h_rssi_cfg.abs_value = abs(priv->cqm_rssi_thold);
        } else if (priv->subsc_evt_rssi_state == RSSI_HIGH_RECVD) {
                subsc_evt.bcn_l_rssi_cfg.abs_value = abs(priv->cqm_rssi_thold);
                subsc_evt.bcn_h_rssi_cfg.abs_value = abs(priv->bcn_rssi_avg +
                                priv->cqm_rssi_hyst);
        }
        subsc_evt.bcn_l_rssi_cfg.evt_freq = 1;
        subsc_evt.bcn_h_rssi_cfg.evt_freq = 1;

        priv->subsc_evt_rssi_state = EVENT_HANDLED;

        mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SUBSCRIBE_EVENT,
                               0, 0, &subsc_evt);

        return 0;
}

/*
 * This function handles the command response of set/get SNMP
 * MIB parameters.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the parameter in driver.
 *
 * The following parameters are supported -
 *      - Fragmentation threshold
 *      - RTS threshold
 *      - Short retry limit
 */
static int mwifiex_ret_802_11_snmp_mib(struct mwifiex_private *priv,
                                       struct host_cmd_ds_command *resp,
                                       u32 *data_buf)
{
        struct host_cmd_ds_802_11_snmp_mib *smib = &resp->params.smib;
        u16 oid = le16_to_cpu(smib->oid);
        u16 query_type = le16_to_cpu(smib->query_type);
        u32 ul_temp;

        dev_dbg(priv->adapter->dev, "info: SNMP_RESP: oid value = %#x,"
                " query_type = %#x, buf size = %#x\n",
                oid, query_type, le16_to_cpu(smib->buf_size));
        if (query_type == HostCmd_ACT_GEN_GET) {
                ul_temp = le16_to_cpu(*((__le16 *) (smib->value)));
                if (data_buf)
                        *data_buf = ul_temp;
                switch (oid) {
                case FRAG_THRESH_I:
                        dev_dbg(priv->adapter->dev,
                                "info: SNMP_RESP: FragThsd =%u\n", ul_temp);
                        break;
                case RTS_THRESH_I:
                        dev_dbg(priv->adapter->dev,
                                "info: SNMP_RESP: RTSThsd =%u\n", ul_temp);
                        break;
                case SHORT_RETRY_LIM_I:
                        dev_dbg(priv->adapter->dev,
                                "info: SNMP_RESP: TxRetryCount=%u\n", ul_temp);
                        break;
                case DTIM_PERIOD_I:
                        dev_dbg(priv->adapter->dev,
                                "info: SNMP_RESP: DTIM period=%u\n", ul_temp);
                default:
                        break;
                }
        }

        return 0;
}

/*
 * This function handles the command response of get log request
 *
 * Handling includes changing the header fields into CPU format
 * and sending the received parameters to application.
 */
static int mwifiex_ret_get_log(struct mwifiex_private *priv,
                               struct host_cmd_ds_command *resp,
                               struct mwifiex_ds_get_stats *stats)
{
        struct host_cmd_ds_802_11_get_log *get_log =
                (struct host_cmd_ds_802_11_get_log *) &resp->params.get_log;

        if (stats) {
                stats->mcast_tx_frame = le32_to_cpu(get_log->mcast_tx_frame);
                stats->failed = le32_to_cpu(get_log->failed);
                stats->retry = le32_to_cpu(get_log->retry);
                stats->multi_retry = le32_to_cpu(get_log->multi_retry);
                stats->frame_dup = le32_to_cpu(get_log->frame_dup);
                stats->rts_success = le32_to_cpu(get_log->rts_success);
                stats->rts_failure = le32_to_cpu(get_log->rts_failure);
                stats->ack_failure = le32_to_cpu(get_log->ack_failure);
                stats->rx_frag = le32_to_cpu(get_log->rx_frag);
                stats->mcast_rx_frame = le32_to_cpu(get_log->mcast_rx_frame);
                stats->fcs_error = le32_to_cpu(get_log->fcs_error);
                stats->tx_frame = le32_to_cpu(get_log->tx_frame);
                stats->wep_icv_error[0] =
                        le32_to_cpu(get_log->wep_icv_err_cnt[0]);
                stats->wep_icv_error[1] =
                        le32_to_cpu(get_log->wep_icv_err_cnt[1]);
                stats->wep_icv_error[2] =
                        le32_to_cpu(get_log->wep_icv_err_cnt[2]);
                stats->wep_icv_error[3] =
                        le32_to_cpu(get_log->wep_icv_err_cnt[3]);
        }

        return 0;
}

/*
 * This function handles the command response of set/get Tx rate
 * configurations.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the following parameters in driver -
 *      - DSSS rate bitmap
 *      - OFDM rate bitmap
 *      - HT MCS rate bitmaps
 *
 * Based on the new rate bitmaps, the function re-evaluates if
 * auto data rate has been activated. If not, it sends another
 * query to the firmware to get the current Tx data rate and updates
 * the driver value.
 */
static int mwifiex_ret_tx_rate_cfg(struct mwifiex_private *priv,
                                   struct host_cmd_ds_command *resp,
                                   struct mwifiex_rate_cfg *ds_rate)
{
        struct host_cmd_ds_tx_rate_cfg *rate_cfg = &resp->params.tx_rate_cfg;
        struct mwifiex_rate_scope *rate_scope;
        struct mwifiex_ie_types_header *head;
        u16 tlv, tlv_buf_len;
        u8 *tlv_buf;
        u32 i;
        int ret = 0;

        tlv_buf = (u8 *) ((u8 *) rate_cfg) +
                        sizeof(struct host_cmd_ds_tx_rate_cfg);
        tlv_buf_len = *(u16 *) (tlv_buf + sizeof(u16));

        while (tlv_buf && tlv_buf_len > 0) {
                tlv = (*tlv_buf);
                tlv = tlv | (*(tlv_buf + 1) << 8);

                switch (tlv) {
                case TLV_TYPE_RATE_SCOPE:
                        rate_scope = (struct mwifiex_rate_scope *) tlv_buf;
                        priv->bitmap_rates[0] =
                                le16_to_cpu(rate_scope->hr_dsss_rate_bitmap);
                        priv->bitmap_rates[1] =
                                le16_to_cpu(rate_scope->ofdm_rate_bitmap);
                        for (i = 0;
                             i <
                             sizeof(rate_scope->ht_mcs_rate_bitmap) /
                             sizeof(u16); i++)
                                priv->bitmap_rates[2 + i] =
                                        le16_to_cpu(rate_scope->
                                                    ht_mcs_rate_bitmap[i]);
                        break;
                        /* Add RATE_DROP tlv here */
                }

                head = (struct mwifiex_ie_types_header *) tlv_buf;
                tlv_buf += le16_to_cpu(head->len) + sizeof(*head);
                tlv_buf_len -= le16_to_cpu(head->len);
        }

        priv->is_data_rate_auto = mwifiex_is_rate_auto(priv);

        if (priv->is_data_rate_auto)
                priv->data_rate = 0;
        else
                ret = mwifiex_send_cmd_async(priv,
                                          HostCmd_CMD_802_11_TX_RATE_QUERY,
                                          HostCmd_ACT_GEN_GET, 0, NULL);

        if (!ds_rate)
                return ret;

        if (le16_to_cpu(rate_cfg->action) == HostCmd_ACT_GEN_GET) {
                if (priv->is_data_rate_auto) {
                        ds_rate->is_rate_auto = 1;
                return ret;
        }
        ds_rate->rate = mwifiex_get_rate_index(priv->bitmap_rates,
                                               sizeof(priv->bitmap_rates));

        if (ds_rate->rate >= MWIFIEX_RATE_BITMAP_OFDM0 &&
            ds_rate->rate <= MWIFIEX_RATE_BITMAP_OFDM7)
                ds_rate->rate -= (MWIFIEX_RATE_BITMAP_OFDM0 -
                                  MWIFIEX_RATE_INDEX_OFDM0);

        if (ds_rate->rate >= MWIFIEX_RATE_BITMAP_MCS0 &&
            ds_rate->rate <= MWIFIEX_RATE_BITMAP_MCS127)
                ds_rate->rate -= (MWIFIEX_RATE_BITMAP_MCS0 -
                                  MWIFIEX_RATE_INDEX_MCS0);
        }

        return ret;
}

/*
 * This function handles the command response of get Tx power level.
 *
 * Handling includes saving the maximum and minimum Tx power levels
 * in driver, as well as sending the values to user.
 */
static int mwifiex_get_power_level(struct mwifiex_private *priv, void *data_buf)
{
        int length, max_power = -1, min_power = -1;
        struct mwifiex_types_power_group *pg_tlv_hdr;
        struct mwifiex_power_group *pg;

        if (!data_buf)
                return -1;

        pg_tlv_hdr = (struct mwifiex_types_power_group *)
                ((u8 *) data_buf + sizeof(struct host_cmd_ds_txpwr_cfg));
        pg = (struct mwifiex_power_group *)
                ((u8 *) pg_tlv_hdr + sizeof(struct mwifiex_types_power_group));
        length = pg_tlv_hdr->length;
        if (length > 0) {
                max_power = pg->power_max;
                min_power = pg->power_min;
                length -= sizeof(struct mwifiex_power_group);
        }
        while (length) {
                pg++;
                if (max_power < pg->power_max)
                        max_power = pg->power_max;

                if (min_power > pg->power_min)
                        min_power = pg->power_min;

                length -= sizeof(struct mwifiex_power_group);
        }
        if (pg_tlv_hdr->length > 0) {
                priv->min_tx_power_level = (u8) min_power;
                priv->max_tx_power_level = (u8) max_power;
        }

        return 0;
}

/*
 * This function handles the command response of set/get Tx power
 * configurations.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the current Tx power level in driver.
 */
static int mwifiex_ret_tx_power_cfg(struct mwifiex_private *priv,
                                    struct host_cmd_ds_command *resp)
{
        struct mwifiex_adapter *adapter = priv->adapter;
        struct host_cmd_ds_txpwr_cfg *txp_cfg = &resp->params.txp_cfg;
        struct mwifiex_types_power_group *pg_tlv_hdr;
        struct mwifiex_power_group *pg;
        u16 action = le16_to_cpu(txp_cfg->action);

        switch (action) {
        case HostCmd_ACT_GEN_GET:
                pg_tlv_hdr = (struct mwifiex_types_power_group *)
                        ((u8 *) txp_cfg +
                         sizeof(struct host_cmd_ds_txpwr_cfg));

                pg = (struct mwifiex_power_group *)
                        ((u8 *) pg_tlv_hdr +
                         sizeof(struct mwifiex_types_power_group));

                if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING)
                        mwifiex_get_power_level(priv, txp_cfg);

                priv->tx_power_level = (u16) pg->power_min;
                break;

        case HostCmd_ACT_GEN_SET:
                if (!le32_to_cpu(txp_cfg->mode))
                        break;

                pg_tlv_hdr = (struct mwifiex_types_power_group *)
                        ((u8 *) txp_cfg +
                         sizeof(struct host_cmd_ds_txpwr_cfg));

                pg = (struct mwifiex_power_group *)
                        ((u8 *) pg_tlv_hdr +
                         sizeof(struct mwifiex_types_power_group));

                if (pg->power_max == pg->power_min)
                        priv->tx_power_level = (u16) pg->power_min;
                break;
        default:
                dev_err(adapter->dev, "CMD_RESP: unknown cmd action %d\n",
                        action);
                return 0;
        }
        dev_dbg(adapter->dev,
                "info: Current TxPower Level = %d, Max Power=%d, Min Power=%d\n",
               priv->tx_power_level, priv->max_tx_power_level,
               priv->min_tx_power_level);

        return 0;
}

/*
 * This function handles the command response of get RF Tx power.
 */
static int mwifiex_ret_rf_tx_power(struct mwifiex_private *priv,
                                   struct host_cmd_ds_command *resp)
{
        struct host_cmd_ds_rf_tx_pwr *txp = &resp->params.txp;
        u16 action = le16_to_cpu(txp->action);

        priv->tx_power_level = le16_to_cpu(txp->cur_level);

        if (action == HostCmd_ACT_GEN_GET) {
                priv->max_tx_power_level = txp->max_power;
                priv->min_tx_power_level = txp->min_power;
        }

        dev_dbg(priv->adapter->dev,
                "Current TxPower Level=%d, Max Power=%d, Min Power=%d\n",
                priv->tx_power_level, priv->max_tx_power_level,
                priv->min_tx_power_level);

        return 0;
}

/*
 * This function handles the command response of set/get MAC address.
 *
 * Handling includes saving the MAC address in driver.
 */
static int mwifiex_ret_802_11_mac_address(struct mwifiex_private *priv,
                                          struct host_cmd_ds_command *resp)
{
        struct host_cmd_ds_802_11_mac_address *cmd_mac_addr =
                                                        &resp->params.mac_addr;

        memcpy(priv->curr_addr, cmd_mac_addr->mac_addr, ETH_ALEN);

        dev_dbg(priv->adapter->dev,
                "info: set mac address: %pM\n", priv->curr_addr);

        return 0;
}

/*
 * This function handles the command response of set/get MAC multicast
 * address.
 */
static int mwifiex_ret_mac_multicast_adr(struct mwifiex_private *priv,
                                         struct host_cmd_ds_command *resp)
{
        return 0;
}

/*
 * This function handles the command response of get Tx rate query.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the Tx rate and HT information parameters in driver.
 *
 * Both rate configuration and current data rate can be retrieved
 * with this request.
 */
static int mwifiex_ret_802_11_tx_rate_query(struct mwifiex_private *priv,
                                            struct host_cmd_ds_command *resp)
{
        priv->tx_rate = resp->params.tx_rate.tx_rate;
        priv->tx_htinfo = resp->params.tx_rate.ht_info;
        if (!priv->is_data_rate_auto)
                priv->data_rate =
                        mwifiex_index_to_data_rate(priv, priv->tx_rate,
                                                   priv->tx_htinfo);

        return 0;
}

/*
 * This function handles the command response of a deauthenticate
 * command.
 *
 * If the deauthenticated MAC matches the current BSS MAC, the connection
 * state is reset.
 */
static int mwifiex_ret_802_11_deauthenticate(struct mwifiex_private *priv,
                                             struct host_cmd_ds_command *resp)
{
        struct mwifiex_adapter *adapter = priv->adapter;

        adapter->dbg.num_cmd_deauth++;
        if (!memcmp(resp->params.deauth.mac_addr,
                    &priv->curr_bss_params.bss_descriptor.mac_address,
                    sizeof(resp->params.deauth.mac_addr)))
                mwifiex_reset_connect_state(priv);

        return 0;
}

/*
 * This function handles the command response of ad-hoc stop.
 *
 * The function resets the connection state in driver.
 */
static int mwifiex_ret_802_11_ad_hoc_stop(struct mwifiex_private *priv,
                                          struct host_cmd_ds_command *resp)
{
        mwifiex_reset_connect_state(priv);
        return 0;
}

/*
 * This function handles the command response of set/get key material.
 *
 * Handling includes updating the driver parameters to reflect the
 * changes.
 */
static int mwifiex_ret_802_11_key_material(struct mwifiex_private *priv,
                                           struct host_cmd_ds_command *resp)
{
        struct host_cmd_ds_802_11_key_material *key =
                                                &resp->params.key_material;

        if (le16_to_cpu(key->action) == HostCmd_ACT_GEN_SET) {
                if ((le16_to_cpu(key->key_param_set.key_info) & KEY_MCAST)) {
                        dev_dbg(priv->adapter->dev, "info: key: GTK is set\n");
                        priv->wpa_is_gtk_set = true;
                        priv->scan_block = false;
                }
        }

        memset(priv->aes_key.key_param_set.key, 0,
               sizeof(key->key_param_set.key));
        priv->aes_key.key_param_set.key_len = key->key_param_set.key_len;
        memcpy(priv->aes_key.key_param_set.key, key->key_param_set.key,
               le16_to_cpu(priv->aes_key.key_param_set.key_len));

        return 0;
}

/*
 * This function handles the command response of get 11d domain information.
 */
static int mwifiex_ret_802_11d_domain_info(struct mwifiex_private *priv,
                                           struct host_cmd_ds_command *resp)
{
        struct host_cmd_ds_802_11d_domain_info_rsp *domain_info =
                &resp->params.domain_info_resp;
        struct mwifiex_ietypes_domain_param_set *domain = &domain_info->domain;
        u16 action = le16_to_cpu(domain_info->action);
        u8 no_of_triplet;

        no_of_triplet = (u8) ((le16_to_cpu(domain->header.len)
                                - IEEE80211_COUNTRY_STRING_LEN)
                              / sizeof(struct ieee80211_country_ie_triplet));

        dev_dbg(priv->adapter->dev,
                "info: 11D Domain Info Resp: no_of_triplet=%d\n",
                no_of_triplet);

        if (no_of_triplet > MWIFIEX_MAX_TRIPLET_802_11D) {
                dev_warn(priv->adapter->dev,
                         "11D: invalid number of triplets %d returned\n",
                         no_of_triplet);
                return -1;
        }

        switch (action) {
        case HostCmd_ACT_GEN_SET:  /* Proc Set Action */
                break;
        case HostCmd_ACT_GEN_GET:
                break;
        default:
                dev_err(priv->adapter->dev,
                        "11D: invalid action:%d\n", domain_info->action);
                return -1;
        }

        return 0;
}

/*
 * This function handles the command response of get RF channel.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the new channel in driver.
 */
static int mwifiex_ret_802_11_rf_channel(struct mwifiex_private *priv,
                                         struct host_cmd_ds_command *resp,
                                         u16 *data_buf)
{
        struct host_cmd_ds_802_11_rf_channel *rf_channel =
                &resp->params.rf_channel;
        u16 new_channel = le16_to_cpu(rf_channel->current_channel);

        if (priv->curr_bss_params.bss_descriptor.channel != new_channel) {
                dev_dbg(priv->adapter->dev, "cmd: Channel Switch: %d to %d\n",
                        priv->curr_bss_params.bss_descriptor.channel,
                        new_channel);
                /* Update the channel again */
                priv->curr_bss_params.bss_descriptor.channel = new_channel;
        }

        if (data_buf)
                *data_buf = new_channel;

        return 0;
}

/*
 * This function handles the command response of get extended version.
 *
 * Handling includes forming the extended version string and sending it
 * to application.
 */
static int mwifiex_ret_ver_ext(struct mwifiex_private *priv,
                               struct host_cmd_ds_command *resp,
                               struct host_cmd_ds_version_ext *version_ext)
{
        struct host_cmd_ds_version_ext *ver_ext = &resp->params.verext;

        if (version_ext) {
                version_ext->version_str_sel = ver_ext->version_str_sel;
                memcpy(version_ext->version_str, ver_ext->version_str,
                       sizeof(char) * 128);
                memcpy(priv->version_str, ver_ext->version_str, 128);
        }
        return 0;
}

/*
 * This function handles the command response of register access.
 *
 * The register value and offset are returned to the user. For EEPROM
 * access, the byte count is also returned.
 */
static int mwifiex_ret_reg_access(u16 type, struct host_cmd_ds_command *resp,
                                  void *data_buf)
{
        struct mwifiex_ds_reg_rw *reg_rw;
        struct mwifiex_ds_read_eeprom *eeprom;
        union reg {
                struct host_cmd_ds_mac_reg_access *mac;
                struct host_cmd_ds_bbp_reg_access *bbp;
                struct host_cmd_ds_rf_reg_access *rf;
                struct host_cmd_ds_pmic_reg_access *pmic;
                struct host_cmd_ds_802_11_eeprom_access *eeprom;
        } r;

        if (!data_buf)
                return 0;

        reg_rw = data_buf;
        eeprom = data_buf;
        switch (type) {
        case HostCmd_CMD_MAC_REG_ACCESS:
                r.mac = (struct host_cmd_ds_mac_reg_access *)
                        &resp->params.mac_reg;
                reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.mac->offset));
                reg_rw->value = r.mac->value;
                break;
        case HostCmd_CMD_BBP_REG_ACCESS:
                r.bbp = (struct host_cmd_ds_bbp_reg_access *)
                        &resp->params.bbp_reg;
                reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.bbp->offset));
                reg_rw->value = cpu_to_le32((u32) r.bbp->value);
                break;

        case HostCmd_CMD_RF_REG_ACCESS:
                r.rf = (struct host_cmd_ds_rf_reg_access *)
                       &resp->params.rf_reg;
                reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.rf->offset));
                reg_rw->value = cpu_to_le32((u32) r.bbp->value);
                break;
        case HostCmd_CMD_PMIC_REG_ACCESS:
                r.pmic = (struct host_cmd_ds_pmic_reg_access *)
                         &resp->params.pmic_reg;
                reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.pmic->offset));
                reg_rw->value = cpu_to_le32((u32) r.pmic->value);
                break;
        case HostCmd_CMD_CAU_REG_ACCESS:
                r.rf = (struct host_cmd_ds_rf_reg_access *)
                       &resp->params.rf_reg;
                reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.rf->offset));
                reg_rw->value = cpu_to_le32((u32) r.rf->value);
                break;
        case HostCmd_CMD_802_11_EEPROM_ACCESS:
                r.eeprom = (struct host_cmd_ds_802_11_eeprom_access *)
                           &resp->params.eeprom;
                pr_debug("info: EEPROM read len=%x\n", r.eeprom->byte_count);
                if (le16_to_cpu(eeprom->byte_count) <
                    le16_to_cpu(r.eeprom->byte_count)) {
                        eeprom->byte_count = cpu_to_le16(0);
                        pr_debug("info: EEPROM read length is too big\n");
                        return -1;
                }
                eeprom->offset = r.eeprom->offset;
                eeprom->byte_count = r.eeprom->byte_count;
                if (le16_to_cpu(eeprom->byte_count) > 0)
                        memcpy(&eeprom->value, &r.eeprom->value,
                               le16_to_cpu(r.eeprom->byte_count));

                break;
        default:
                return -1;
        }
        return 0;
}

/*
 * This function handles the command response of get IBSS coalescing status.
 *
 * If the received BSSID is different than the current one, the current BSSID,
 * beacon interval, ATIM window and ERP information are updated, along with
 * changing the ad-hoc state accordingly.
 */
static int mwifiex_ret_ibss_coalescing_status(struct mwifiex_private *priv,
                                              struct host_cmd_ds_command *resp)
{
        struct host_cmd_ds_802_11_ibss_status *ibss_coal_resp =
                                        &(resp->params.ibss_coalescing);
        u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };

        if (le16_to_cpu(ibss_coal_resp->action) == HostCmd_ACT_GEN_SET)
                return 0;

        dev_dbg(priv->adapter->dev,
                "info: new BSSID %pM\n", ibss_coal_resp->bssid);

        /* If rsp has NULL BSSID, Just return..... No Action */
        if (!memcmp(ibss_coal_resp->bssid, zero_mac, ETH_ALEN)) {
                dev_warn(priv->adapter->dev, "new BSSID is NULL\n");
                return 0;
        }

        /* If BSSID is diff, modify current BSS parameters */
        if (memcmp(priv->curr_bss_params.bss_descriptor.mac_address,
                   ibss_coal_resp->bssid, ETH_ALEN)) {
                /* BSSID */
                memcpy(priv->curr_bss_params.bss_descriptor.mac_address,
                       ibss_coal_resp->bssid, ETH_ALEN);

                /* Beacon Interval */
                priv->curr_bss_params.bss_descriptor.beacon_period
                        = le16_to_cpu(ibss_coal_resp->beacon_interval);

                /* ERP Information */
                priv->curr_bss_params.bss_descriptor.erp_flags =
                        (u8) le16_to_cpu(ibss_coal_resp->use_g_rate_protect);

                priv->adhoc_state = ADHOC_COALESCED;
        }

        return 0;
}

/*
 * This function handles the command response for subscribe event command.
 */
static int mwifiex_ret_subsc_evt(struct mwifiex_private *priv,
                                 struct host_cmd_ds_command *resp,
                                 struct mwifiex_ds_misc_subsc_evt *sub_event)
{
        struct host_cmd_ds_802_11_subsc_evt *cmd_sub_event =
                (struct host_cmd_ds_802_11_subsc_evt *)&resp->params.subsc_evt;

        /* For every subscribe event command (Get/Set/Clear), FW reports the
         * current set of subscribed events*/
        dev_dbg(priv->adapter->dev, "Bitmap of currently subscribed events: %16x\n",
                le16_to_cpu(cmd_sub_event->events));

        /*Return the subscribed event info for a Get request*/
        if (sub_event)
                sub_event->events = le16_to_cpu(cmd_sub_event->events);

        return 0;
}

/*
 * This function handles the command responses.
 *
 * This is a generic function, which calls command specific
 * response handlers based on the command ID.
 */
int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv, u16 cmdresp_no,
                                struct host_cmd_ds_command *resp)
{
        int ret = 0;
        struct mwifiex_adapter *adapter = priv->adapter;
        void *data_buf = adapter->curr_cmd->data_buf;

        /* If the command is not successful, cleanup and return failure */
        if (resp->result != HostCmd_RESULT_OK) {
                mwifiex_process_cmdresp_error(priv, resp);
                return -1;
        }
        /* Command successful, handle response */
        switch (cmdresp_no) {
        case HostCmd_CMD_GET_HW_SPEC:
                ret = mwifiex_ret_get_hw_spec(priv, resp);
                break;
        case HostCmd_CMD_MAC_CONTROL:
                break;
        case HostCmd_CMD_802_11_MAC_ADDRESS:
                ret = mwifiex_ret_802_11_mac_address(priv, resp);
                break;
        case HostCmd_CMD_MAC_MULTICAST_ADR:
                ret = mwifiex_ret_mac_multicast_adr(priv, resp);
                break;
        case HostCmd_CMD_TX_RATE_CFG:
                ret = mwifiex_ret_tx_rate_cfg(priv, resp, data_buf);
                break;
        case HostCmd_CMD_802_11_SCAN:
                ret = mwifiex_ret_802_11_scan(priv, resp);
                adapter->curr_cmd->wait_q_enabled = false;
                break;
        case HostCmd_CMD_802_11_BG_SCAN_QUERY:
                ret = mwifiex_ret_802_11_scan(priv, resp);
                dev_dbg(adapter->dev,
                        "info: CMD_RESP: BG_SCAN result is ready!\n");
                break;
        case HostCmd_CMD_TXPWR_CFG:
                ret = mwifiex_ret_tx_power_cfg(priv, resp);
                break;
        case HostCmd_CMD_RF_TX_PWR:
                ret = mwifiex_ret_rf_tx_power(priv, resp);
                break;
        case HostCmd_CMD_802_11_PS_MODE_ENH:
                ret = mwifiex_ret_enh_power_mode(priv, resp, data_buf);
                break;
        case HostCmd_CMD_802_11_HS_CFG_ENH:
                ret = mwifiex_ret_802_11_hs_cfg(priv, resp);
                break;
        case HostCmd_CMD_802_11_ASSOCIATE:
                ret = mwifiex_ret_802_11_associate(priv, resp);
                break;
        case HostCmd_CMD_802_11_DEAUTHENTICATE:
                ret = mwifiex_ret_802_11_deauthenticate(priv, resp);
                break;
        case HostCmd_CMD_802_11_AD_HOC_START:
        case HostCmd_CMD_802_11_AD_HOC_JOIN:
                ret = mwifiex_ret_802_11_ad_hoc(priv, resp);
                break;
        case HostCmd_CMD_802_11_AD_HOC_STOP:
                ret = mwifiex_ret_802_11_ad_hoc_stop(priv, resp);
                break;
        case HostCmd_CMD_802_11_GET_LOG:
                ret = mwifiex_ret_get_log(priv, resp, data_buf);
                break;
        case HostCmd_CMD_RSSI_INFO:
                ret = mwifiex_ret_802_11_rssi_info(priv, resp);
                break;
        case HostCmd_CMD_802_11_SNMP_MIB:
                ret = mwifiex_ret_802_11_snmp_mib(priv, resp, data_buf);
                break;
        case HostCmd_CMD_802_11_TX_RATE_QUERY:
                ret = mwifiex_ret_802_11_tx_rate_query(priv, resp);
                break;
        case HostCmd_CMD_802_11_RF_CHANNEL:
                ret = mwifiex_ret_802_11_rf_channel(priv, resp, data_buf);
                break;
        case HostCmd_CMD_VERSION_EXT:
                ret = mwifiex_ret_ver_ext(priv, resp, data_buf);
                break;
        case HostCmd_CMD_FUNC_INIT:
        case HostCmd_CMD_FUNC_SHUTDOWN:
                break;
        case HostCmd_CMD_802_11_KEY_MATERIAL:
                ret = mwifiex_ret_802_11_key_material(priv, resp);
                break;
        case HostCmd_CMD_802_11D_DOMAIN_INFO:
                ret = mwifiex_ret_802_11d_domain_info(priv, resp);
                break;
        case HostCmd_CMD_11N_ADDBA_REQ:
                ret = mwifiex_ret_11n_addba_req(priv, resp);
                break;
        case HostCmd_CMD_11N_DELBA:
                ret = mwifiex_ret_11n_delba(priv, resp);
                break;
        case HostCmd_CMD_11N_ADDBA_RSP:
                ret = mwifiex_ret_11n_addba_resp(priv, resp);
                break;
        case HostCmd_CMD_RECONFIGURE_TX_BUFF:
                adapter->tx_buf_size = (u16) le16_to_cpu(resp->params.
                                                             tx_buf.buff_size);
                adapter->tx_buf_size = (adapter->tx_buf_size
                                        / MWIFIEX_SDIO_BLOCK_SIZE)
                                       * MWIFIEX_SDIO_BLOCK_SIZE;
                adapter->curr_tx_buf_size = adapter->tx_buf_size;
                dev_dbg(adapter->dev,
                        "cmd: max_tx_buf_size=%d, tx_buf_size=%d\n",
                        adapter->max_tx_buf_size, adapter->tx_buf_size);

                if (adapter->if_ops.update_mp_end_port)
                        adapter->if_ops.update_mp_end_port(adapter,
                                le16_to_cpu(resp->params.tx_buf.mp_end_port));
                break;
        case HostCmd_CMD_AMSDU_AGGR_CTRL:
                ret = mwifiex_ret_amsdu_aggr_ctrl(resp, data_buf);
                break;
        case HostCmd_CMD_WMM_GET_STATUS:
                ret = mwifiex_ret_wmm_get_status(priv, resp);
                break;
        case HostCmd_CMD_802_11_IBSS_COALESCING_STATUS:
                ret = mwifiex_ret_ibss_coalescing_status(priv, resp);
                break;
        case HostCmd_CMD_MAC_REG_ACCESS:
        case HostCmd_CMD_BBP_REG_ACCESS:
        case HostCmd_CMD_RF_REG_ACCESS:
        case HostCmd_CMD_PMIC_REG_ACCESS:
        case HostCmd_CMD_CAU_REG_ACCESS:
        case HostCmd_CMD_802_11_EEPROM_ACCESS:
                ret = mwifiex_ret_reg_access(cmdresp_no, resp, data_buf);
                break;
        case HostCmd_CMD_SET_BSS_MODE:
                break;
        case HostCmd_CMD_11N_CFG:
                ret = mwifiex_ret_11n_cfg(resp, data_buf);
                break;
        case HostCmd_CMD_PCIE_DESC_DETAILS:
                break;
        case HostCmd_CMD_802_11_SUBSCRIBE_EVENT:
                ret = mwifiex_ret_subsc_evt(priv, resp, data_buf);
                break;
        case HostCmd_CMD_UAP_SYS_CONFIG:
                break;
        case HostCmd_CMD_UAP_BSS_START:
                priv->bss_started = 1;
                break;
        case HostCmd_CMD_UAP_BSS_STOP:
                priv->bss_started = 0;
                break;
        default:
                dev_err(adapter->dev, "CMD_RESP: unknown cmd response %#x\n",
                        resp->command);
                break;
        }

        return ret;
}