sta_ioctl.c

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/*
 * 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"

static int disconnect_on_suspend = 1;
module_param(disconnect_on_suspend, int, 0644);

/*
 * 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);

    /* 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,
                  struct cfg80211_bss *bss,
                  struct mwifiex_bssdescriptor *bss_desc)
{
    int ret;
    u8 *beacon_ie;
    struct mwifiex_bss_priv *bss_priv = (void *)bss->priv;

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

    memcpy(bss_desc->mac_address, bss->bssid, ETH_ALEN);
    bss_desc->rssi = bss->signal;
    bss_desc->beacon_buf = beacon_ie;
    bss_desc->beacon_buf_size = bss->len_beacon_ies;
    bss_desc->beacon_period = bss->beacon_interval;
    bss_desc->cap_info_bitmap = bss->capability;
    bss_desc->bss_band = bss_priv->band;
    bss_desc->fw_tsf = bss_priv->fw_tsf;
    bss_desc->timestamp = bss->tsf;
    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);

    kfree(beacon_ie);
    return ret;
}

static int mwifiex_process_country_ie(struct mwifiex_private *priv,
                      struct cfg80211_bss *bss)
{
    u8 *country_ie, country_ie_len;
    struct mwifiex_802_11d_domain_reg *domain_info =
                    &priv->adapter->domain_reg;

    country_ie = (u8 *)ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);

    if (!country_ie)
        return 0;

    country_ie_len = country_ie[1];
    if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
        return 0;

    domain_info->country_code[0] = country_ie[2];
    domain_info->country_code[1] = country_ie[3];
    domain_info->country_code[2] = ' ';

    country_ie_len -= IEEE80211_COUNTRY_STRING_LEN;

    domain_info->no_of_triplet =
        country_ie_len / sizeof(struct ieee80211_country_ie_triplet);

    memcpy((u8 *)domain_info->triplet,
           &country_ie[2] + IEEE80211_COUNTRY_STRING_LEN, country_ie_len);

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

    return 0;
}

/*
 * 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;

    priv->scan_block = false;

    if (bss) {
        mwifiex_process_country_ie(priv, 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;
        }

        ret = mwifiex_fill_new_bss_desc(priv, bss, 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);
            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);
    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;
    struct mwifiex_private *priv;
    int i;

    if (disconnect_on_suspend) {
        for (i = 0; i < adapter->priv_num; i++) {
            priv = adapter->priv[i];
            if (priv)
                mwifiex_deauthenticate(priv, NULL);
        }
    }

    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;

    memcpy(info->country_code, adapter->country_code,
           IEEE80211_COUNTRY_STRING_LEN);

    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);

/*
 * 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, u32 *rate)
{
    int ret;

    ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_TX_RATE_QUERY,
                    HostCmd_ACT_GEN_GET, 0, NULL);

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

    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/reset WPS IE.
 *
 * The supplied WPS IE is treated as a opaque buffer. Only the first field
 * is checked to internally enable WPS. If buffer length is zero, the existing
 * WPS IE is reset.
 */
static int mwifiex_set_wps_ie(struct mwifiex_private *priv,
                   u8 *ie_data_ptr, u16 ie_len)
{
    if (ie_len) {
        priv->wps_ie = kzalloc(MWIFIEX_MAX_VSIE_LEN, GFP_KERNEL);
        if (!priv->wps_ie)
            return -ENOMEM;
        if (ie_len > sizeof(priv->wps_ie)) {
            dev_dbg(priv->adapter->dev,
                "info: failed to copy WPS IE, too big\n");
            kfree(priv->wps_ie);
            return -1;
        }
        memcpy(priv->wps_ie, ie_data_ptr, ie_len);
        priv->wps_ie_len = ie_len;
        dev_dbg(priv->adapter->dev, "cmd: Set wps_ie_len=%d IE=%#x\n",
            priv->wps_ie_len, priv->wps_ie[0]);
    } else {
        kfree(priv->wps_ie);
        priv->wps_ie_len = ie_len;
        dev_dbg(priv->adapter->dev,
            "info: Reset wps_ie_len=%d\n", priv->wps_ie_len);
    }
    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, struct key_params *kp,
               const u8 *key, int key_len, u8 key_index,
               const u8 *mac_addr, 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 (kp && kp->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
        encrypt_key.is_igtk_key = true;

    if (!disable) {
        encrypt_key.key_index = key_index;
        if (key_len)
            memcpy(encrypt_key.key_material, key, key_len);
        if (mac_addr)
            memcpy(encrypt_key.mac_addr, mac_addr, ETH_ALEN);
        if (kp && kp->seq && kp->seq_len)
            memcpy(encrypt_key.pn, kp->seq, kp->seq_len);
    } else {
        encrypt_key.key_disable = true;
        if (mac_addr)
            memcpy(encrypt_key.mac_addr, mac_addr, ETH_ALEN);
    }

    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;
}

int
mwifiex_remain_on_chan_cfg(struct mwifiex_private *priv, u16 action,
               struct ieee80211_channel *chan,
               enum nl80211_channel_type *ct,
               unsigned int duration)
{
    struct host_cmd_ds_remain_on_chan roc_cfg;
    u8 sc;

    memset(&roc_cfg, 0, sizeof(roc_cfg));
    roc_cfg.action = cpu_to_le16(action);
    if (action == HostCmd_ACT_GEN_SET) {
        roc_cfg.band_cfg = chan->band;
        sc = mwifiex_chan_type_to_sec_chan_offset(*ct);
        roc_cfg.band_cfg |= (sc << 2);

        roc_cfg.channel =
            ieee80211_frequency_to_channel(chan->center_freq);
        roc_cfg.duration = cpu_to_le32(duration);
    }
    if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_REMAIN_ON_CHAN,
                  action, 0, &roc_cfg)) {
        dev_err(priv->adapter->dev, "failed to remain on channel\n");
        return -1;
    }

    return roc_cfg.status;
}

int
mwifiex_set_bss_role(struct mwifiex_private *priv, u8 bss_role)
{
    if (GET_BSS_ROLE(priv) == bss_role) {
        dev_dbg(priv->adapter->dev,
            "info: already in the desired role.\n");
        return 0;
    }

    mwifiex_free_priv(priv);
    mwifiex_init_priv(priv);

    priv->bss_role = bss_role;
    switch (bss_role) {
    case MWIFIEX_BSS_ROLE_UAP:
        priv->bss_mode = NL80211_IFTYPE_AP;
        break;
    case MWIFIEX_BSS_ROLE_STA:
    case MWIFIEX_BSS_ROLE_ANY:
    default:
        priv->bss_mode = NL80211_IFTYPE_STATION;
        break;
    }

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

    return mwifiex_sta_init_cmd(priv, false);
}

/*
 * 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");
            ret = mwifiex_set_wps_ie(priv, ie_data_ptr, ie_len);
        }

        /* 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;
}