Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

[deliverable/linux.git] / drivers / net / wireless / mwifiex / sta_ioctl.c

/*
 * Marvell Wireless LAN device driver: functions for station ioctl
 *
 * 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"
#include "cfg80211.h"

/*
 * Copies the multicast address list from device to driver.
 *
 * This function does not validate the destination memory for
 * size, and the calling function must ensure enough memory is
 * available.
 */
int mwifiex_copy_mcast_addr(struct mwifiex_multicast_list *mlist,
                            struct net_device *dev)
{
        int i = 0;
        struct netdev_hw_addr *ha;

        netdev_for_each_mc_addr(ha, dev)
                memcpy(&mlist->mac_list[i++], ha->addr, ETH_ALEN);

        return i;
}

/*
 * Wait queue completion handler.
 *
 * This function waits on a cmd wait queue. It also cancels the pending
 * request after waking up, in case of errors.
 */
int mwifiex_wait_queue_complete(struct mwifiex_adapter *adapter)
{
        bool cancel_flag = false;
        int status;
        struct cmd_ctrl_node *cmd_queued;

        if (!adapter->cmd_queued)
                return 0;

        cmd_queued = adapter->cmd_queued;
        adapter->cmd_queued = NULL;

        dev_dbg(adapter->dev, "cmd pending\n");
        atomic_inc(&adapter->cmd_pending);

        /* Status pending, wake up main process */
        queue_work(adapter->workqueue, &adapter->main_work);

        /* Wait for completion */
        wait_event_interruptible(adapter->cmd_wait_q.wait,
                                 *(cmd_queued->condition));
        if (!*(cmd_queued->condition))
                cancel_flag = true;

        if (cancel_flag) {
                mwifiex_cancel_pending_ioctl(adapter);
                dev_dbg(adapter->dev, "cmd cancel\n");
        }

        status = adapter->cmd_wait_q.status;
        adapter->cmd_wait_q.status = 0;

        return status;
}

/*
 * This function prepares the correct firmware command and
 * issues it to set the multicast list.
 *
 * This function can be used to enable promiscuous mode, or enable all
 * multicast packets, or to enable selective multicast.
 */
int mwifiex_request_set_multicast_list(struct mwifiex_private *priv,
                                struct mwifiex_multicast_list *mcast_list)
{
        int ret = 0;
        u16 old_pkt_filter;

        old_pkt_filter = priv->curr_pkt_filter;

        if (mcast_list->mode == MWIFIEX_PROMISC_MODE) {
                dev_dbg(priv->adapter->dev, "info: Enable Promiscuous mode\n");
                priv->curr_pkt_filter |= HostCmd_ACT_MAC_PROMISCUOUS_ENABLE;
                priv->curr_pkt_filter &=
                        ~HostCmd_ACT_MAC_ALL_MULTICAST_ENABLE;
        } else {
                /* Multicast */
                priv->curr_pkt_filter &= ~HostCmd_ACT_MAC_PROMISCUOUS_ENABLE;
                if (mcast_list->mode == MWIFIEX_MULTICAST_MODE) {
                        dev_dbg(priv->adapter->dev,
                                "info: Enabling All Multicast!\n");
                        priv->curr_pkt_filter |=
                                HostCmd_ACT_MAC_ALL_MULTICAST_ENABLE;
                } else {
                        priv->curr_pkt_filter &=
                                ~HostCmd_ACT_MAC_ALL_MULTICAST_ENABLE;
                        if (mcast_list->num_multicast_addr) {
                                dev_dbg(priv->adapter->dev,
                                        "info: Set multicast list=%d\n",
                                       mcast_list->num_multicast_addr);
                                /* Set multicast addresses to firmware */
                                if (old_pkt_filter == priv->curr_pkt_filter) {
                                        /* Send request to firmware */
                                        ret = mwifiex_send_cmd_async(priv,
                                                HostCmd_CMD_MAC_MULTICAST_ADR,
                                                HostCmd_ACT_GEN_SET, 0,
                                                mcast_list);
                                } else {
                                        /* Send request to firmware */
                                        ret = mwifiex_send_cmd_async(priv,
                                                HostCmd_CMD_MAC_MULTICAST_ADR,
                                                HostCmd_ACT_GEN_SET, 0,
                                                mcast_list);
                                }
                        }
                }
        }
        dev_dbg(priv->adapter->dev,
                "info: old_pkt_filter=%#x, curr_pkt_filter=%#x\n",
               old_pkt_filter, priv->curr_pkt_filter);
        if (old_pkt_filter != priv->curr_pkt_filter) {
                ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_MAC_CONTROL,
                                             HostCmd_ACT_GEN_SET,
                                             0, &priv->curr_pkt_filter);
        }

        return ret;
}

/*
 * This function fills bss descriptor structure using provided
 * information.
 */
int mwifiex_fill_new_bss_desc(struct mwifiex_private *priv,
                              u8 *bssid, s32 rssi, u8 *ie_buf,
                              size_t ie_len, u16 beacon_period,
                              u16 cap_info_bitmap, u8 band,
                              struct mwifiex_bssdescriptor *bss_desc)
{
        int ret;

        memcpy(bss_desc->mac_address, bssid, ETH_ALEN);
        bss_desc->rssi = rssi;
        bss_desc->beacon_buf = ie_buf;
        bss_desc->beacon_buf_size = ie_len;
        bss_desc->beacon_period = beacon_period;
        bss_desc->cap_info_bitmap = cap_info_bitmap;
        bss_desc->bss_band = band;
        if (bss_desc->cap_info_bitmap & WLAN_CAPABILITY_PRIVACY) {
                dev_dbg(priv->adapter->dev, "info: InterpretIE: AP WEP enabled\n");
                bss_desc->privacy = MWIFIEX_802_11_PRIV_FILTER_8021X_WEP;
        } else {
                bss_desc->privacy = MWIFIEX_802_11_PRIV_FILTER_ACCEPT_ALL;
        }
        if (bss_desc->cap_info_bitmap & WLAN_CAPABILITY_IBSS)
                bss_desc->bss_mode = NL80211_IFTYPE_ADHOC;
        else
                bss_desc->bss_mode = NL80211_IFTYPE_STATION;

        ret = mwifiex_update_bss_desc_with_ie(priv->adapter, bss_desc,
                                              ie_buf, ie_len);

        return ret;
}

/*
 * In Ad-Hoc mode, the IBSS is created if not found in scan list.
 * In both Ad-Hoc and infra mode, an deauthentication is performed
 * first.
 */
int mwifiex_bss_start(struct mwifiex_private *priv, struct cfg80211_bss *bss,
                      struct cfg80211_ssid *req_ssid)
{
        int ret;
        struct mwifiex_adapter *adapter = priv->adapter;
        struct mwifiex_bssdescriptor *bss_desc = NULL;
        u8 *beacon_ie = NULL;

        priv->scan_block = false;

        if (bss) {
                /* Allocate and fill new bss descriptor */
                bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
                                GFP_KERNEL);
                if (!bss_desc) {
                        dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
                        return -ENOMEM;
                }

                beacon_ie = kmemdup(bss->information_elements,
                                        bss->len_beacon_ies, GFP_KERNEL);
                if (!beacon_ie) {
                        kfree(bss_desc);
                        dev_err(priv->adapter->dev, " failed to alloc beacon_ie\n");
                        return -ENOMEM;
                }

                ret = mwifiex_fill_new_bss_desc(priv, bss->bssid, bss->signal,
                                                beacon_ie, bss->len_beacon_ies,
                                                bss->beacon_interval,
                                                bss->capability,
                                                *(u8 *)bss->priv, bss_desc);
                if (ret)
                        goto done;
        }

        if (priv->bss_mode == NL80211_IFTYPE_STATION) {
                /* Infra mode */
                ret = mwifiex_deauthenticate(priv, NULL);
                if (ret)
                        goto done;

                ret = mwifiex_check_network_compatibility(priv, bss_desc);
                if (ret)
                        goto done;

                dev_dbg(adapter->dev, "info: SSID found in scan list ... "
                                      "associating...\n");

                if (!netif_queue_stopped(priv->netdev))
                        mwifiex_stop_net_dev_queue(priv->netdev, adapter);
                if (netif_carrier_ok(priv->netdev))
                        netif_carrier_off(priv->netdev);

                /* Clear any past association response stored for
                 * application retrieval */
                priv->assoc_rsp_size = 0;
                ret = mwifiex_associate(priv, bss_desc);

                /* If auth type is auto and association fails using open mode,
                 * try to connect using shared mode */
                if (ret == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
                    priv->sec_info.is_authtype_auto &&
                    priv->sec_info.wep_enabled) {
                        priv->sec_info.authentication_mode =
                                                NL80211_AUTHTYPE_SHARED_KEY;
                        ret = mwifiex_associate(priv, bss_desc);
                }

                if (bss)
                        cfg80211_put_bss(bss);
        } else {
                /* Adhoc mode */
                /* If the requested SSID matches current SSID, return */
                if (bss_desc && bss_desc->ssid.ssid_len &&
                    (!mwifiex_ssid_cmp(&priv->curr_bss_params.bss_descriptor.
                                       ssid, &bss_desc->ssid))) {
                        kfree(bss_desc);
                        kfree(beacon_ie);
                        return 0;
                }

                /* Exit Adhoc mode first */
                dev_dbg(adapter->dev, "info: Sending Adhoc Stop\n");
                ret = mwifiex_deauthenticate(priv, NULL);
                if (ret)
                        goto done;

                priv->adhoc_is_link_sensed = false;

                ret = mwifiex_check_network_compatibility(priv, bss_desc);

                if (!netif_queue_stopped(priv->netdev))
                        mwifiex_stop_net_dev_queue(priv->netdev, adapter);
                if (netif_carrier_ok(priv->netdev))
                        netif_carrier_off(priv->netdev);

                if (!ret) {
                        dev_dbg(adapter->dev, "info: network found in scan"
                                                        " list. Joining...\n");
                        ret = mwifiex_adhoc_join(priv, bss_desc);
                        if (bss)
                                cfg80211_put_bss(bss);
                } else {
                        dev_dbg(adapter->dev, "info: Network not found in "
                                "the list, creating adhoc with ssid = %s\n",
                                req_ssid->ssid);
                        ret = mwifiex_adhoc_start(priv, req_ssid);
                }
        }

done:
        kfree(bss_desc);
        kfree(beacon_ie);
        return ret;
}

/*
 * IOCTL request handler to set host sleep configuration.
 *
 * This function prepares the correct firmware command and
 * issues it.
 */
static int mwifiex_set_hs_params(struct mwifiex_private *priv, u16 action,
                                 int cmd_type, struct mwifiex_ds_hs_cfg *hs_cfg)

{
        struct mwifiex_adapter *adapter = priv->adapter;
        int status = 0;
        u32 prev_cond = 0;

        if (!hs_cfg)
                return -ENOMEM;

        switch (action) {
        case HostCmd_ACT_GEN_SET:
                if (adapter->pps_uapsd_mode) {
                        dev_dbg(adapter->dev, "info: Host Sleep IOCTL"
                                " is blocked in UAPSD/PPS mode\n");
                        status = -1;
                        break;
                }
                if (hs_cfg->is_invoke_hostcmd) {
                        if (hs_cfg->conditions == HOST_SLEEP_CFG_CANCEL) {
                                if (!adapter->is_hs_configured)
                                        /* Already cancelled */
                                        break;
                                /* Save previous condition */
                                prev_cond = le32_to_cpu(adapter->hs_cfg
                                                        .conditions);
                                adapter->hs_cfg.conditions =
                                                cpu_to_le32(hs_cfg->conditions);
                        } else if (hs_cfg->conditions) {
                                adapter->hs_cfg.conditions =
                                                cpu_to_le32(hs_cfg->conditions);
                                adapter->hs_cfg.gpio = (u8)hs_cfg->gpio;
                                if (hs_cfg->gap)
                                        adapter->hs_cfg.gap = (u8)hs_cfg->gap;
                        } else if (adapter->hs_cfg.conditions
                                   == cpu_to_le32(HOST_SLEEP_CFG_CANCEL)) {
                                /* Return failure if no parameters for HS
                                   enable */
                                status = -1;
                                break;
                        }
                        if (cmd_type == MWIFIEX_SYNC_CMD)
                                status = mwifiex_send_cmd_sync(priv,
                                                HostCmd_CMD_802_11_HS_CFG_ENH,
                                                HostCmd_ACT_GEN_SET, 0,
                                                &adapter->hs_cfg);
                        else
                                status = mwifiex_send_cmd_async(priv,
                                                HostCmd_CMD_802_11_HS_CFG_ENH,
                                                HostCmd_ACT_GEN_SET, 0,
                                                &adapter->hs_cfg);
                        if (hs_cfg->conditions == HOST_SLEEP_CFG_CANCEL)
                                /* Restore previous condition */
                                adapter->hs_cfg.conditions =
                                                cpu_to_le32(prev_cond);
                } else {
                        adapter->hs_cfg.conditions =
                                                cpu_to_le32(hs_cfg->conditions);
                        adapter->hs_cfg.gpio = (u8)hs_cfg->gpio;
                        adapter->hs_cfg.gap = (u8)hs_cfg->gap;
                }
                break;
        case HostCmd_ACT_GEN_GET:
                hs_cfg->conditions = le32_to_cpu(adapter->hs_cfg.conditions);
                hs_cfg->gpio = adapter->hs_cfg.gpio;
                hs_cfg->gap = adapter->hs_cfg.gap;
                break;
        default:
                status = -1;
                break;
        }

        return status;
}

/*
 * Sends IOCTL request to cancel the existing Host Sleep configuration.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int mwifiex_cancel_hs(struct mwifiex_private *priv, int cmd_type)
{
        struct mwifiex_ds_hs_cfg hscfg;

        hscfg.conditions = HOST_SLEEP_CFG_CANCEL;
        hscfg.is_invoke_hostcmd = true;

        return mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_SET,
                                    cmd_type, &hscfg);
}
EXPORT_SYMBOL_GPL(mwifiex_cancel_hs);

/*
 * Sends IOCTL request to cancel the existing Host Sleep configuration.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int mwifiex_enable_hs(struct mwifiex_adapter *adapter)
{
        struct mwifiex_ds_hs_cfg hscfg;

        if (adapter->hs_activated) {
                dev_dbg(adapter->dev, "cmd: HS Already actived\n");
                return true;
        }

        adapter->hs_activate_wait_q_woken = false;

        memset(&hscfg, 0, sizeof(struct mwifiex_ds_hs_cfg));
        hscfg.is_invoke_hostcmd = true;

        if (mwifiex_set_hs_params(mwifiex_get_priv(adapter,
                                                   MWIFIEX_BSS_ROLE_STA),
                                  HostCmd_ACT_GEN_SET, MWIFIEX_SYNC_CMD,
                                  &hscfg)) {
                dev_err(adapter->dev, "IOCTL request HS enable failed\n");
                return false;
        }

        wait_event_interruptible(adapter->hs_activate_wait_q,
                                 adapter->hs_activate_wait_q_woken);

        return true;
}
EXPORT_SYMBOL_GPL(mwifiex_enable_hs);

/*
 * IOCTL request handler to get BSS information.
 *
 * This function collates the information from different driver structures
 * to send to the user.
 */
int mwifiex_get_bss_info(struct mwifiex_private *priv,
                         struct mwifiex_bss_info *info)
{
        struct mwifiex_adapter *adapter = priv->adapter;
        struct mwifiex_bssdescriptor *bss_desc;

        if (!info)
                return -1;

        bss_desc = &priv->curr_bss_params.bss_descriptor;

        info->bss_mode = priv->bss_mode;

        memcpy(&info->ssid, &bss_desc->ssid, sizeof(struct cfg80211_ssid));

        memcpy(&info->bssid, &bss_desc->mac_address, ETH_ALEN);

        info->bss_chan = bss_desc->channel;

        info->region_code = adapter->region_code;

        info->media_connected = priv->media_connected;

        info->max_power_level = priv->max_tx_power_level;
        info->min_power_level = priv->min_tx_power_level;

        info->adhoc_state = priv->adhoc_state;

        info->bcn_nf_last = priv->bcn_nf_last;

        if (priv->sec_info.wep_enabled)
                info->wep_status = true;
        else
                info->wep_status = false;

        info->is_hs_configured = adapter->is_hs_configured;
        info->is_deep_sleep = adapter->is_deep_sleep;

        return 0;
}

/*
 * The function disables auto deep sleep mode.
 */
int mwifiex_disable_auto_ds(struct mwifiex_private *priv)
{
        struct mwifiex_ds_auto_ds auto_ds;

        auto_ds.auto_ds = DEEP_SLEEP_OFF;

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_PS_MODE_ENH,
                                     DIS_AUTO_PS, BITMAP_AUTO_DS, &auto_ds);
}
EXPORT_SYMBOL_GPL(mwifiex_disable_auto_ds);

/*
 * IOCTL request handler to set/get active channel.
 *
 * This function performs validity checking on channel/frequency
 * compatibility and returns failure if not valid.
 */
int mwifiex_bss_set_channel(struct mwifiex_private *priv,
                            struct mwifiex_chan_freq_power *chan)
{
        struct mwifiex_adapter *adapter = priv->adapter;
        struct mwifiex_chan_freq_power *cfp = NULL;

        if (!chan)
                return -1;

        if (!chan->channel && !chan->freq)
                return -1;
        if (adapter->adhoc_start_band & BAND_AN)
                adapter->adhoc_start_band = BAND_G | BAND_B | BAND_GN;
        else if (adapter->adhoc_start_band & BAND_A)
                adapter->adhoc_start_band = BAND_G | BAND_B;
        if (chan->channel) {
                if (chan->channel <= MAX_CHANNEL_BAND_BG)
                        cfp = mwifiex_get_cfp(priv, 0, (u16) chan->channel, 0);
                if (!cfp) {
                        cfp = mwifiex_get_cfp(priv, BAND_A,
                                              (u16) chan->channel, 0);
                        if (cfp) {
                                if (adapter->adhoc_11n_enabled)
                                        adapter->adhoc_start_band = BAND_A
                                                                    | BAND_AN;
                                else
                                        adapter->adhoc_start_band = BAND_A;
                        }
                }
        } else {
                if (chan->freq <= MAX_FREQUENCY_BAND_BG)
                        cfp = mwifiex_get_cfp(priv, 0, 0, chan->freq);
                if (!cfp) {
                        cfp = mwifiex_get_cfp(priv, BAND_A, 0, chan->freq);
                        if (cfp) {
                                if (adapter->adhoc_11n_enabled)
                                        adapter->adhoc_start_band = BAND_A
                                                                    | BAND_AN;
                                else
                                        adapter->adhoc_start_band = BAND_A;
                        }
                }
        }
        if (!cfp || !cfp->channel) {
                dev_err(adapter->dev, "invalid channel/freq\n");
                return -1;
        }
        priv->adhoc_channel = (u8) cfp->channel;
        chan->channel = cfp->channel;
        chan->freq = cfp->freq;

        return 0;
}

/*
 * IOCTL request handler to set/get Ad-Hoc channel.
 *
 * This function prepares the correct firmware command and
 * issues it to set or get the ad-hoc channel.
 */
static int mwifiex_bss_ioctl_ibss_channel(struct mwifiex_private *priv,
                                          u16 action, u16 *channel)
{
        if (action == HostCmd_ACT_GEN_GET) {
                if (!priv->media_connected) {
                        *channel = priv->adhoc_channel;
                        return 0;
                }
        } else {
                priv->adhoc_channel = (u8) *channel;
        }

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_RF_CHANNEL,
                                     action, 0, channel);
}

/*
 * IOCTL request handler to change Ad-Hoc channel.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 *
 * The function follows the following steps to perform the change -
 *      - Get current IBSS information
 *      - Get current channel
 *      - If no change is required, return
 *      - If not connected, change channel and return
 *      - If connected,
 *          - Disconnect
 *          - Change channel
 *          - Perform specific SSID scan with same SSID
 *          - Start/Join the IBSS
 */
int
mwifiex_drv_change_adhoc_chan(struct mwifiex_private *priv, u16 channel)
{
        int ret;
        struct mwifiex_bss_info bss_info;
        struct mwifiex_ssid_bssid ssid_bssid;
        u16 curr_chan = 0;
        struct cfg80211_bss *bss = NULL;
        struct ieee80211_channel *chan;
        enum ieee80211_band band;

        memset(&bss_info, 0, sizeof(bss_info));

        /* Get BSS information */
        if (mwifiex_get_bss_info(priv, &bss_info))
                return -1;

        /* Get current channel */
        ret = mwifiex_bss_ioctl_ibss_channel(priv, HostCmd_ACT_GEN_GET,
                                             &curr_chan);

        if (curr_chan == channel) {
                ret = 0;
                goto done;
        }
        dev_dbg(priv->adapter->dev, "cmd: updating channel from %d to %d\n",
                curr_chan, channel);

        if (!bss_info.media_connected) {
                ret = 0;
                goto done;
        }

        /* Do disonnect */
        memset(&ssid_bssid, 0, ETH_ALEN);
        ret = mwifiex_deauthenticate(priv, ssid_bssid.bssid);

        ret = mwifiex_bss_ioctl_ibss_channel(priv, HostCmd_ACT_GEN_SET,
                                             &channel);

        /* Do specific SSID scanning */
        if (mwifiex_request_scan(priv, &bss_info.ssid)) {
                ret = -1;
                goto done;
        }

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

        /* Find the BSS we want using available scan results */
        bss = cfg80211_get_bss(priv->wdev->wiphy, chan, bss_info.bssid,
                               bss_info.ssid.ssid, bss_info.ssid.ssid_len,
                               WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
        if (!bss)
                wiphy_warn(priv->wdev->wiphy, "assoc: bss %pM not in scan results\n",
                           bss_info.bssid);

        ret = mwifiex_bss_start(priv, bss, &bss_info.ssid);
done:
        return ret;
}

/*
 * IOCTL request handler to get rate.
 *
 * This function prepares the correct firmware command and
 * issues it to get the current rate if it is connected,
 * otherwise, the function returns the lowest supported rate
 * for the band.
 */
static int mwifiex_rate_ioctl_get_rate_value(struct mwifiex_private *priv,
                                             struct mwifiex_rate_cfg *rate_cfg)
{
        rate_cfg->is_rate_auto = priv->is_data_rate_auto;
        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_TX_RATE_QUERY,
                                     HostCmd_ACT_GEN_GET, 0, NULL);
}

/*
 * IOCTL request handler to set rate.
 *
 * This function prepares the correct firmware command and
 * issues it to set the current rate.
 *
 * The function also performs validation checking on the supplied value.
 */
static int mwifiex_rate_ioctl_set_rate_value(struct mwifiex_private *priv,
                                             struct mwifiex_rate_cfg *rate_cfg)
{
        u8 rates[MWIFIEX_SUPPORTED_RATES];
        u8 *rate;
        int rate_index, ret;
        u16 bitmap_rates[MAX_BITMAP_RATES_SIZE];
        u32 i;
        struct mwifiex_adapter *adapter = priv->adapter;

        if (rate_cfg->is_rate_auto) {
                memset(bitmap_rates, 0, sizeof(bitmap_rates));
                /* Support all HR/DSSS rates */
                bitmap_rates[0] = 0x000F;
                /* Support all OFDM rates */
                bitmap_rates[1] = 0x00FF;
                /* Support all HT-MCSs rate */
                for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates) - 3; i++)
                        bitmap_rates[i + 2] = 0xFFFF;
                bitmap_rates[9] = 0x3FFF;
        } else {
                memset(rates, 0, sizeof(rates));
                mwifiex_get_active_data_rates(priv, rates);
                rate = rates;
                for (i = 0; (rate[i] && i < MWIFIEX_SUPPORTED_RATES); i++) {
                        dev_dbg(adapter->dev, "info: rate=%#x wanted=%#x\n",
                                rate[i], rate_cfg->rate);
                        if ((rate[i] & 0x7f) == (rate_cfg->rate & 0x7f))
                                break;
                }
                if ((i == MWIFIEX_SUPPORTED_RATES) || !rate[i]) {
                        dev_err(adapter->dev, "fixed data rate %#x is out "
                               "of range\n", rate_cfg->rate);
                        return -1;
                }
                memset(bitmap_rates, 0, sizeof(bitmap_rates));

                rate_index = mwifiex_data_rate_to_index(rate_cfg->rate);

                /* Only allow b/g rates to be set */
                if (rate_index >= MWIFIEX_RATE_INDEX_HRDSSS0 &&
                    rate_index <= MWIFIEX_RATE_INDEX_HRDSSS3) {
                        bitmap_rates[0] = 1 << rate_index;
                } else {
                        rate_index -= 1; /* There is a 0x00 in the table */
                        if (rate_index >= MWIFIEX_RATE_INDEX_OFDM0 &&
                            rate_index <= MWIFIEX_RATE_INDEX_OFDM7)
                                bitmap_rates[1] = 1 << (rate_index -
                                                   MWIFIEX_RATE_INDEX_OFDM0);
                }
        }

        ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_TX_RATE_CFG,
                                    HostCmd_ACT_GEN_SET, 0, bitmap_rates);

        return ret;
}

/*
 * IOCTL request handler to set/get rate.
 *
 * This function can be used to set/get either the rate value or the
 * rate index.
 */
static int mwifiex_rate_ioctl_cfg(struct mwifiex_private *priv,
                                  struct mwifiex_rate_cfg *rate_cfg)
{
        int status;

        if (!rate_cfg)
                return -1;

        if (rate_cfg->action == HostCmd_ACT_GEN_GET)
                status = mwifiex_rate_ioctl_get_rate_value(priv, rate_cfg);
        else
                status = mwifiex_rate_ioctl_set_rate_value(priv, rate_cfg);

        return status;
}

/*
 * Sends IOCTL request to get the data rate.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int mwifiex_drv_get_data_rate(struct mwifiex_private *priv,
                              struct mwifiex_rate_cfg *rate)
{
        int ret;

        memset(rate, 0, sizeof(struct mwifiex_rate_cfg));
        rate->action = HostCmd_ACT_GEN_GET;
        ret = mwifiex_rate_ioctl_cfg(priv, rate);

        if (!ret) {
                if (rate->is_rate_auto)
                        rate->rate = mwifiex_index_to_data_rate(priv,
                                                                priv->tx_rate,
                                                                priv->tx_htinfo
                                                                );
                else
                        rate->rate = priv->data_rate;
        } else {
                ret = -1;
        }

        return ret;
}

/*
 * IOCTL request handler to set tx power configuration.
 *
 * This function prepares the correct firmware command and
 * issues it.
 *
 * For non-auto power mode, all the following power groups are set -
 *      - Modulation class HR/DSSS
 *      - Modulation class OFDM
 *      - Modulation class HTBW20
 *      - Modulation class HTBW40
 */
int mwifiex_set_tx_power(struct mwifiex_private *priv,
                         struct mwifiex_power_cfg *power_cfg)
{
        int ret;
        struct host_cmd_ds_txpwr_cfg *txp_cfg;
        struct mwifiex_types_power_group *pg_tlv;
        struct mwifiex_power_group *pg;
        u8 *buf;
        u16 dbm = 0;

        if (!power_cfg->is_power_auto) {
                dbm = (u16) power_cfg->power_level;
                if ((dbm < priv->min_tx_power_level) ||
                    (dbm > priv->max_tx_power_level)) {
                        dev_err(priv->adapter->dev, "txpower value %d dBm"
                                " is out of range (%d dBm-%d dBm)\n",
                                dbm, priv->min_tx_power_level,
                                priv->max_tx_power_level);
                        return -1;
                }
        }
        buf = kzalloc(MWIFIEX_SIZE_OF_CMD_BUFFER, GFP_KERNEL);
        if (!buf) {
                dev_err(priv->adapter->dev, "%s: failed to alloc cmd buffer\n",
                        __func__);
                return -ENOMEM;
        }

        txp_cfg = (struct host_cmd_ds_txpwr_cfg *) buf;
        txp_cfg->action = cpu_to_le16(HostCmd_ACT_GEN_SET);
        if (!power_cfg->is_power_auto) {
                txp_cfg->mode = cpu_to_le32(1);
                pg_tlv = (struct mwifiex_types_power_group *)
                         (buf + sizeof(struct host_cmd_ds_txpwr_cfg));
                pg_tlv->type = TLV_TYPE_POWER_GROUP;
                pg_tlv->length = 4 * sizeof(struct mwifiex_power_group);
                pg = (struct mwifiex_power_group *)
                     (buf + sizeof(struct host_cmd_ds_txpwr_cfg)
                      + sizeof(struct mwifiex_types_power_group));
                /* Power group for modulation class HR/DSSS */
                pg->first_rate_code = 0x00;
                pg->last_rate_code = 0x03;
                pg->modulation_class = MOD_CLASS_HR_DSSS;
                pg->power_step = 0;
                pg->power_min = (s8) dbm;
                pg->power_max = (s8) dbm;
                pg++;
                /* Power group for modulation class OFDM */
                pg->first_rate_code = 0x00;
                pg->last_rate_code = 0x07;
                pg->modulation_class = MOD_CLASS_OFDM;
                pg->power_step = 0;
                pg->power_min = (s8) dbm;
                pg->power_max = (s8) dbm;
                pg++;
                /* Power group for modulation class HTBW20 */
                pg->first_rate_code = 0x00;
                pg->last_rate_code = 0x20;
                pg->modulation_class = MOD_CLASS_HT;
                pg->power_step = 0;
                pg->power_min = (s8) dbm;
                pg->power_max = (s8) dbm;
                pg->ht_bandwidth = HT_BW_20;
                pg++;
                /* Power group for modulation class HTBW40 */
                pg->first_rate_code = 0x00;
                pg->last_rate_code = 0x20;
                pg->modulation_class = MOD_CLASS_HT;
                pg->power_step = 0;
                pg->power_min = (s8) dbm;
                pg->power_max = (s8) dbm;
                pg->ht_bandwidth = HT_BW_40;
        }
        ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_TXPWR_CFG,
                                    HostCmd_ACT_GEN_SET, 0, buf);

        kfree(buf);
        return ret;
}

/*
 * IOCTL request handler to get power save mode.
 *
 * This function prepares the correct firmware command and
 * issues it.
 */
int mwifiex_drv_set_power(struct mwifiex_private *priv, u32 *ps_mode)
{
        int ret;
        struct mwifiex_adapter *adapter = priv->adapter;
        u16 sub_cmd;

        if (*ps_mode)
                adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_PSP;
        else
                adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
        sub_cmd = (*ps_mode) ? EN_AUTO_PS : DIS_AUTO_PS;
        ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_PS_MODE_ENH,
                                    sub_cmd, BITMAP_STA_PS, NULL);
        if ((!ret) && (sub_cmd == DIS_AUTO_PS))
                ret = mwifiex_send_cmd_async(priv,
                                             HostCmd_CMD_802_11_PS_MODE_ENH,
                                             GET_PS, 0, NULL);

        return ret;
}

/*
 * IOCTL request handler to set/reset WPA IE.
 *
 * The supplied WPA IE is treated as a opaque buffer. Only the first field
 * is checked to determine WPA version. If buffer length is zero, the existing
 * WPA IE is reset.
 */
static int mwifiex_set_wpa_ie_helper(struct mwifiex_private *priv,
                                     u8 *ie_data_ptr, u16 ie_len)
{
        if (ie_len) {
                if (ie_len > sizeof(priv->wpa_ie)) {
                        dev_err(priv->adapter->dev,
                                "failed to copy WPA IE, too big\n");
                        return -1;
                }
                memcpy(priv->wpa_ie, ie_data_ptr, ie_len);
                priv->wpa_ie_len = (u8) ie_len;
                dev_dbg(priv->adapter->dev, "cmd: Set Wpa_ie_len=%d IE=%#x\n",
                        priv->wpa_ie_len, priv->wpa_ie[0]);

                if (priv->wpa_ie[0] == WLAN_EID_WPA) {
                        priv->sec_info.wpa_enabled = true;
                } else if (priv->wpa_ie[0] == WLAN_EID_RSN) {
                        priv->sec_info.wpa2_enabled = true;
                } else {
                        priv->sec_info.wpa_enabled = false;
                        priv->sec_info.wpa2_enabled = false;
                }
        } else {
                memset(priv->wpa_ie, 0, sizeof(priv->wpa_ie));
                priv->wpa_ie_len = 0;
                dev_dbg(priv->adapter->dev, "info: reset wpa_ie_len=%d IE=%#x\n",
                        priv->wpa_ie_len, priv->wpa_ie[0]);
                priv->sec_info.wpa_enabled = false;
                priv->sec_info.wpa2_enabled = false;
        }

        return 0;
}

/*
 * IOCTL request handler to set/reset WAPI IE.
 *
 * The supplied WAPI IE is treated as a opaque buffer. Only the first field
 * is checked to internally enable WAPI. If buffer length is zero, the existing
 * WAPI IE is reset.
 */
static int mwifiex_set_wapi_ie(struct mwifiex_private *priv,
                               u8 *ie_data_ptr, u16 ie_len)
{
        if (ie_len) {
                if (ie_len > sizeof(priv->wapi_ie)) {
                        dev_dbg(priv->adapter->dev,
                                "info: failed to copy WAPI IE, too big\n");
                        return -1;
                }
                memcpy(priv->wapi_ie, ie_data_ptr, ie_len);
                priv->wapi_ie_len = ie_len;
                dev_dbg(priv->adapter->dev, "cmd: Set wapi_ie_len=%d IE=%#x\n",
                        priv->wapi_ie_len, priv->wapi_ie[0]);

                if (priv->wapi_ie[0] == WLAN_EID_BSS_AC_ACCESS_DELAY)
                        priv->sec_info.wapi_enabled = true;
        } else {
                memset(priv->wapi_ie, 0, sizeof(priv->wapi_ie));
                priv->wapi_ie_len = ie_len;
                dev_dbg(priv->adapter->dev,
                        "info: Reset wapi_ie_len=%d IE=%#x\n",
                       priv->wapi_ie_len, priv->wapi_ie[0]);
                priv->sec_info.wapi_enabled = false;
        }
        return 0;
}

/*
 * IOCTL request handler to set WAPI key.
 *
 * This function prepares the correct firmware command and
 * issues it.
 */
static int mwifiex_sec_ioctl_set_wapi_key(struct mwifiex_private *priv,
                               struct mwifiex_ds_encrypt_key *encrypt_key)
{

        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_KEY_MATERIAL,
                                     HostCmd_ACT_GEN_SET, KEY_INFO_ENABLED,
                                     encrypt_key);
}

/*
 * IOCTL request handler to set WEP network key.
 *
 * This function prepares the correct firmware command and
 * issues it, after validation checks.
 */
static int mwifiex_sec_ioctl_set_wep_key(struct mwifiex_private *priv,
                              struct mwifiex_ds_encrypt_key *encrypt_key)
{
        int ret;
        struct mwifiex_wep_key *wep_key;
        int index;

        if (priv->wep_key_curr_index >= NUM_WEP_KEYS)
                priv->wep_key_curr_index = 0;
        wep_key = &priv->wep_key[priv->wep_key_curr_index];
        index = encrypt_key->key_index;
        if (encrypt_key->key_disable) {
                priv->sec_info.wep_enabled = 0;
        } else if (!encrypt_key->key_len) {
                /* Copy the required key as the current key */
                wep_key = &priv->wep_key[index];
                if (!wep_key->key_length) {
                        dev_err(priv->adapter->dev,
                                "key not set, so cannot enable it\n");
                        return -1;
                }
                priv->wep_key_curr_index = (u16) index;
                priv->sec_info.wep_enabled = 1;
        } else {
                wep_key = &priv->wep_key[index];
                memset(wep_key, 0, sizeof(struct mwifiex_wep_key));
                /* Copy the key in the driver */
                memcpy(wep_key->key_material,
                       encrypt_key->key_material,
                       encrypt_key->key_len);
                wep_key->key_index = index;
                wep_key->key_length = encrypt_key->key_len;
                priv->sec_info.wep_enabled = 1;
        }
        if (wep_key->key_length) {
                /* Send request to firmware */
                ret = mwifiex_send_cmd_async(priv,
                                             HostCmd_CMD_802_11_KEY_MATERIAL,
                                             HostCmd_ACT_GEN_SET, 0, NULL);
                if (ret)
                        return ret;
        }
        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;

        ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_MAC_CONTROL,
                                    HostCmd_ACT_GEN_SET, 0,
                                    &priv->curr_pkt_filter);

        return ret;
}

/*
 * IOCTL request handler to set WPA key.
 *
 * This function prepares the correct firmware command and
 * issues it, after validation checks.
 *
 * Current driver only supports key length of up to 32 bytes.
 *
 * This function can also be used to disable a currently set key.
 */
static int mwifiex_sec_ioctl_set_wpa_key(struct mwifiex_private *priv,
                              struct mwifiex_ds_encrypt_key *encrypt_key)
{
        int ret;
        u8 remove_key = false;
        struct host_cmd_ds_802_11_key_material *ibss_key;

        /* Current driver only supports key length of up to 32 bytes */
        if (encrypt_key->key_len > WLAN_MAX_KEY_LEN) {
                dev_err(priv->adapter->dev, "key length too long\n");
                return -1;
        }

        if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
                /*
                 * IBSS/WPA-None uses only one key (Group) for both receiving
                 * and sending unicast and multicast packets.
                 */
                /* Send the key as PTK to firmware */
                encrypt_key->key_index = MWIFIEX_KEY_INDEX_UNICAST;
                ret = mwifiex_send_cmd_async(priv,
                                             HostCmd_CMD_802_11_KEY_MATERIAL,
                                             HostCmd_ACT_GEN_SET,
                                             KEY_INFO_ENABLED, encrypt_key);
                if (ret)
                        return ret;

                ibss_key = &priv->aes_key;
                memset(ibss_key, 0,
                       sizeof(struct host_cmd_ds_802_11_key_material));
                /* Copy the key in the driver */
                memcpy(ibss_key->key_param_set.key, encrypt_key->key_material,
                       encrypt_key->key_len);
                memcpy(&ibss_key->key_param_set.key_len, &encrypt_key->key_len,
                       sizeof(ibss_key->key_param_set.key_len));
                ibss_key->key_param_set.key_type_id
                        = cpu_to_le16(KEY_TYPE_ID_TKIP);
                ibss_key->key_param_set.key_info = cpu_to_le16(KEY_ENABLED);

                /* Send the key as GTK to firmware */
                encrypt_key->key_index = ~MWIFIEX_KEY_INDEX_UNICAST;
        }

        if (!encrypt_key->key_index)
                encrypt_key->key_index = MWIFIEX_KEY_INDEX_UNICAST;

        if (remove_key)
                ret = mwifiex_send_cmd_sync(priv,
                                            HostCmd_CMD_802_11_KEY_MATERIAL,
                                            HostCmd_ACT_GEN_SET,
                                            !KEY_INFO_ENABLED, encrypt_key);
        else
                ret = mwifiex_send_cmd_sync(priv,
                                            HostCmd_CMD_802_11_KEY_MATERIAL,
                                            HostCmd_ACT_GEN_SET,
                                            KEY_INFO_ENABLED, encrypt_key);

        return ret;
}

/*
 * IOCTL request handler to set/get network keys.
 *
 * This is a generic key handling function which supports WEP, WPA
 * and WAPI.
 */
static int
mwifiex_sec_ioctl_encrypt_key(struct mwifiex_private *priv,
                              struct mwifiex_ds_encrypt_key *encrypt_key)
{
        int status;

        if (encrypt_key->is_wapi_key)
                status = mwifiex_sec_ioctl_set_wapi_key(priv, encrypt_key);
        else if (encrypt_key->key_len > WLAN_KEY_LEN_WEP104)
                status = mwifiex_sec_ioctl_set_wpa_key(priv, encrypt_key);
        else
                status = mwifiex_sec_ioctl_set_wep_key(priv, encrypt_key);
        return status;
}

/*
 * This function returns the driver version.
 */
int
mwifiex_drv_get_driver_version(struct mwifiex_adapter *adapter, char *version,
                               int max_len)
{
        union {
                u32 l;
                u8 c[4];
        } ver;
        char fw_ver[32];

        ver.l = adapter->fw_release_number;
        sprintf(fw_ver, "%u.%u.%u.p%u", ver.c[2], ver.c[1], ver.c[0], ver.c[3]);

        snprintf(version, max_len, driver_version, fw_ver);

        dev_dbg(adapter->dev, "info: MWIFIEX VERSION: %s\n", version);

        return 0;
}

/*
 * Sends IOCTL request to set encoding parameters.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int mwifiex_set_encode(struct mwifiex_private *priv, const u8 *key,
                        int key_len, u8 key_index, int disable)
{
        struct mwifiex_ds_encrypt_key encrypt_key;

        memset(&encrypt_key, 0, sizeof(struct mwifiex_ds_encrypt_key));
        encrypt_key.key_len = key_len;
        if (!disable) {
                encrypt_key.key_index = key_index;
                if (key_len)
                        memcpy(encrypt_key.key_material, key, key_len);
        } else {
                encrypt_key.key_disable = true;
        }

        return mwifiex_sec_ioctl_encrypt_key(priv, &encrypt_key);
}

/*
 * Sends IOCTL request to get extended version.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int
mwifiex_get_ver_ext(struct mwifiex_private *priv)
{
        struct mwifiex_ver_ext ver_ext;

        memset(&ver_ext, 0, sizeof(struct host_cmd_ds_version_ext));
        if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_VERSION_EXT,
                                  HostCmd_ACT_GEN_GET, 0, &ver_ext))
                return -1;

        return 0;
}

/*
 * Sends IOCTL request to get statistics information.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int
mwifiex_get_stats_info(struct mwifiex_private *priv,
                       struct mwifiex_ds_get_stats *log)
{
        return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_GET_LOG,
                                     HostCmd_ACT_GEN_GET, 0, log);
}

/*
 * IOCTL request handler to read/write register.
 *
 * This function prepares the correct firmware command and
 * issues it.
 *
 * Access to the following registers are supported -
 *      - MAC
 *      - BBP
 *      - RF
 *      - PMIC
 *      - CAU
 */
static int mwifiex_reg_mem_ioctl_reg_rw(struct mwifiex_private *priv,
                                        struct mwifiex_ds_reg_rw *reg_rw,
                                        u16 action)
{
        u16 cmd_no;

        switch (le32_to_cpu(reg_rw->type)) {
        case MWIFIEX_REG_MAC:
                cmd_no = HostCmd_CMD_MAC_REG_ACCESS;
                break;
        case MWIFIEX_REG_BBP:
                cmd_no = HostCmd_CMD_BBP_REG_ACCESS;
                break;
        case MWIFIEX_REG_RF:
                cmd_no = HostCmd_CMD_RF_REG_ACCESS;
                break;
        case MWIFIEX_REG_PMIC:
                cmd_no = HostCmd_CMD_PMIC_REG_ACCESS;
                break;
        case MWIFIEX_REG_CAU:
                cmd_no = HostCmd_CMD_CAU_REG_ACCESS;
                break;
        default:
                return -1;
        }

        return mwifiex_send_cmd_sync(priv, cmd_no, action, 0, reg_rw);

}

/*
 * Sends IOCTL request to write to a register.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int
mwifiex_reg_write(struct mwifiex_private *priv, u32 reg_type,
                  u32 reg_offset, u32 reg_value)
{
        struct mwifiex_ds_reg_rw reg_rw;

        reg_rw.type = cpu_to_le32(reg_type);
        reg_rw.offset = cpu_to_le32(reg_offset);
        reg_rw.value = cpu_to_le32(reg_value);

        return mwifiex_reg_mem_ioctl_reg_rw(priv, &reg_rw, HostCmd_ACT_GEN_SET);
}

/*
 * Sends IOCTL request to read from a register.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int
mwifiex_reg_read(struct mwifiex_private *priv, u32 reg_type,
                 u32 reg_offset, u32 *value)
{
        int ret;
        struct mwifiex_ds_reg_rw reg_rw;

        reg_rw.type = cpu_to_le32(reg_type);
        reg_rw.offset = cpu_to_le32(reg_offset);
        ret = mwifiex_reg_mem_ioctl_reg_rw(priv, &reg_rw, HostCmd_ACT_GEN_GET);

        if (ret)
                goto done;

        *value = le32_to_cpu(reg_rw.value);

done:
        return ret;
}

/*
 * Sends IOCTL request to read from EEPROM.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int
mwifiex_eeprom_read(struct mwifiex_private *priv, u16 offset, u16 bytes,
                    u8 *value)
{
        int ret;
        struct mwifiex_ds_read_eeprom rd_eeprom;

        rd_eeprom.offset = cpu_to_le16((u16) offset);
        rd_eeprom.byte_count = cpu_to_le16((u16) bytes);

        /* Send request to firmware */
        ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_EEPROM_ACCESS,
                                    HostCmd_ACT_GEN_GET, 0, &rd_eeprom);

        if (!ret)
                memcpy(value, rd_eeprom.value, MAX_EEPROM_DATA);
        return ret;
}

/*
 * This function sets a generic IE. In addition to generic IE, it can
 * also handle WPA, WPA2 and WAPI IEs.
 */
static int
mwifiex_set_gen_ie_helper(struct mwifiex_private *priv, u8 *ie_data_ptr,
                          u16 ie_len)
{
        int ret = 0;
        struct ieee_types_vendor_header *pvendor_ie;
        const u8 wpa_oui[] = { 0x00, 0x50, 0xf2, 0x01 };
        const u8 wps_oui[] = { 0x00, 0x50, 0xf2, 0x04 };

        /* If the passed length is zero, reset the buffer */
        if (!ie_len) {
                priv->gen_ie_buf_len = 0;
                priv->wps.session_enable = false;

                return 0;
        } else if (!ie_data_ptr) {
                return -1;
        }
        pvendor_ie = (struct ieee_types_vendor_header *) ie_data_ptr;
        /* Test to see if it is a WPA IE, if not, then it is a gen IE */
        if (((pvendor_ie->element_id == WLAN_EID_WPA) &&
             (!memcmp(pvendor_ie->oui, wpa_oui, sizeof(wpa_oui)))) ||
            (pvendor_ie->element_id == WLAN_EID_RSN)) {

                /* IE is a WPA/WPA2 IE so call set_wpa function */
                ret = mwifiex_set_wpa_ie_helper(priv, ie_data_ptr, ie_len);
                priv->wps.session_enable = false;

                return ret;
        } else if (pvendor_ie->element_id == WLAN_EID_BSS_AC_ACCESS_DELAY) {
                /* IE is a WAPI IE so call set_wapi function */
                ret = mwifiex_set_wapi_ie(priv, ie_data_ptr, ie_len);

                return ret;
        }
        /*
         * Verify that the passed length is not larger than the
         * available space remaining in the buffer
         */
        if (ie_len < (sizeof(priv->gen_ie_buf) - priv->gen_ie_buf_len)) {

                /* Test to see if it is a WPS IE, if so, enable
                 * wps session flag
                 */
                pvendor_ie = (struct ieee_types_vendor_header *) ie_data_ptr;
                if ((pvendor_ie->element_id == WLAN_EID_VENDOR_SPECIFIC) &&
                    (!memcmp(pvendor_ie->oui, wps_oui, sizeof(wps_oui)))) {
                        priv->wps.session_enable = true;
                        dev_dbg(priv->adapter->dev,
                                "info: WPS Session Enabled.\n");
                }

                /* Append the passed data to the end of the
                   genIeBuffer */
                memcpy(priv->gen_ie_buf + priv->gen_ie_buf_len, ie_data_ptr,
                       ie_len);
                /* Increment the stored buffer length by the
                   size passed */
                priv->gen_ie_buf_len += ie_len;
        } else {
                /* Passed data does not fit in the remaining
                   buffer space */
                ret = -1;
        }

        /* Return 0, or -1 for error case */
        return ret;
}

/*
 * IOCTL request handler to set/get generic IE.
 *
 * In addition to various generic IEs, this function can also be
 * used to set the ARP filter.
 */
static int mwifiex_misc_ioctl_gen_ie(struct mwifiex_private *priv,
                                     struct mwifiex_ds_misc_gen_ie *gen_ie,
                                     u16 action)
{
        struct mwifiex_adapter *adapter = priv->adapter;

        switch (gen_ie->type) {
        case MWIFIEX_IE_TYPE_GEN_IE:
                if (action == HostCmd_ACT_GEN_GET) {
                        gen_ie->len = priv->wpa_ie_len;
                        memcpy(gen_ie->ie_data, priv->wpa_ie, gen_ie->len);
                } else {
                        mwifiex_set_gen_ie_helper(priv, gen_ie->ie_data,
                                                  (u16) gen_ie->len);
                }
                break;
        case MWIFIEX_IE_TYPE_ARP_FILTER:
                memset(adapter->arp_filter, 0, sizeof(adapter->arp_filter));
                if (gen_ie->len > ARP_FILTER_MAX_BUF_SIZE) {
                        adapter->arp_filter_size = 0;
                        dev_err(adapter->dev, "invalid ARP filter size\n");
                        return -1;
                } else {
                        memcpy(adapter->arp_filter, gen_ie->ie_data,
                               gen_ie->len);
                        adapter->arp_filter_size = gen_ie->len;
                }
                break;
        default:
                dev_err(adapter->dev, "invalid IE type\n");
                return -1;
        }
        return 0;
}

/*
 * Sends IOCTL request to set a generic IE.
 *
 * This function allocates the IOCTL request buffer, fills it
 * with requisite parameters and calls the IOCTL handler.
 */
int
mwifiex_set_gen_ie(struct mwifiex_private *priv, u8 *ie, int ie_len)
{
        struct mwifiex_ds_misc_gen_ie gen_ie;

        if (ie_len > IEEE_MAX_IE_SIZE)
                return -EFAULT;

        gen_ie.type = MWIFIEX_IE_TYPE_GEN_IE;
        gen_ie.len = ie_len;
        memcpy(gen_ie.ie_data, ie, ie_len);
        if (mwifiex_misc_ioctl_gen_ie(priv, &gen_ie, HostCmd_ACT_GEN_SET))
                return -EFAULT;

        return 0;
}