/*
 * This function initializes the private structure parameters.
 *
 * The following wait queues are initialized -
 *      - IOCTL wait queue
 *      - Command wait queue
 *      - Statistics wait queue
 *
 * ...and the following default parameters are set -
 *      - Current key index     : Set to 0
 *      - Rate index            : Set to auto
 *      - Media connected       : Set to disconnected
 *      - Adhoc link sensed     : Set to false
 *      - Nick name             : Set to null
 *      - Number of Tx timeout  : Set to 0
 *      - Device address        : Set to current address
 *      - Rx histogram statistc : Set to 0
 *
 * In addition, the CFG80211 work queue is also created.
 */
void mwifiex_init_priv_params(struct mwifiex_private *priv,
                              struct net_device *dev)
{
    dev->netdev_ops = &mwifiex_netdev_ops;
    dev->destructor = free_netdev;
    /* Initialize private structure */
    priv->current_key_index = 0;
    priv->media_connected = false;
    memset(priv->mgmt_ie, 0,
           sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
    priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
    priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
    priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
    priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
    priv->num_tx_timeout = 0;
    ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);
    memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);

    if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
            GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
        priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
        if (priv->hist_data)
            mwifiex_hist_data_reset(priv);
    }
}

/* This function cleans up the USB driver.
 *
 * The following major steps are followed in .disconnect for cleanup:
 *      - Resume the device if its suspended
 *      - Disconnect the device if connected
 *      - Shutdown the firmware
 *      - Unregister the device from USB bus.
 */
static void mwifiex_usb_cleanup_module(void)
{
	if (!down_interruptible(&add_remove_card_sem))
		up(&add_remove_card_sem);

	if (usb_card) {
		struct mwifiex_adapter *adapter = usb_card->adapter;
		int i;

		/* In case driver is removed when asynchronous FW downloading is
		 * in progress
		 */
		wait_for_completion(&adapter->fw_load);

#ifdef CONFIG_PM
		if (adapter->is_suspended)
			mwifiex_usb_resume(usb_card->intf);
#endif
		for (i = 0; i < adapter->priv_num; i++)
			if ((GET_BSS_ROLE(adapter->priv[i]) ==
			     MWIFIEX_BSS_ROLE_STA) &&
			    adapter->priv[i]->media_connected)
				mwifiex_deauthenticate(adapter->priv[i], NULL);

		mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
							  MWIFIEX_BSS_ROLE_ANY),
					 MWIFIEX_FUNC_SHUTDOWN);
	}

	usb_deregister(&mwifiex_usb_driver);
}

/**
 *  @brief This function will check if unicast packet need be dropped
 *
 *  @param priv    A pointer to mlan_private
 *  @param mac     mac address to find in station list table
 *
 *  @return	       MLAN_STATUS_FAILURE -- drop packet, otherwise forward to network stack
 */
static mlan_status
wlan_check_unicast_packet(mlan_private * priv, t_u8 * mac)
{
    int j;
    sta_node *sta_ptr = MNULL;
    pmlan_adapter pmadapter = priv->adapter;
    pmlan_private pmpriv = MNULL;
    t_u8 pkt_type = 0;
    mlan_status ret = MLAN_STATUS_SUCCESS;
    ENTER();
    for (j = 0; j < MLAN_MAX_BSS_NUM; ++j) {
        if ((pmpriv = pmadapter->priv[j])) {
            if (GET_BSS_ROLE(pmpriv) == MLAN_BSS_ROLE_STA)
                continue;
            sta_ptr = wlan_get_station_entry(pmpriv, mac);
            if (sta_ptr) {
                if (pmpriv == priv)
                    pkt_type = PKT_INTRA_UCAST;
                else
                    pkt_type = PKT_INTER_UCAST;
                break;
            }
        }
    }
    if ((pkt_type == PKT_INTRA_UCAST) && (priv->pkt_fwd & PKT_FWD_INTRA_UCAST)) {
        PRINTM(MDATA, "Drop INTRA_UCAST packet\n");
        ret = MLAN_STATUS_FAILURE;
    } else if ((pkt_type == PKT_INTER_UCAST) &&
               (priv->pkt_fwd & PKT_FWD_INTER_UCAST)) {
        PRINTM(MDATA, "Drop INTER_UCAST packet\n");
        ret = MLAN_STATUS_FAILURE;
    }
    LEAVE();
    return ret;
}

/**
 *  @brief This function gets if priv is a station (STA)
 *
 *  @param pmpriv       Pointer to mlan_private structure
 *
 *  @return             MTRUE or MFALSE
 */
t_bool
wlan_is_station(mlan_private * pmpriv)
{
    ENTER();
    LEAVE();
    return (GET_BSS_ROLE(pmpriv) == MLAN_BSS_ROLE_STA) ? MTRUE : MFALSE;
}

/*
 * This function associates to a specific BSS discovered in a scan.
 *
 * It clears any past association response stored for application
 * retrieval and calls the command preparation routine to send the
 * command to firmware.
 */
int mwifiex_associate(struct mwifiex_private *priv,
		      struct mwifiex_bssdescriptor *bss_desc)
{
	u8 current_bssid[ETH_ALEN];

	/* Return error if the adapter is not STA role or table entry
	 * is not marked as infra.
	 */
	if ((GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_STA) ||
	    (bss_desc->bss_mode != NL80211_IFTYPE_STATION))
		return -1;

	if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info) &&
	    !bss_desc->disable_11n && !bss_desc->disable_11ac &&
	    priv->adapter->config_bands & BAND_AAC)
		mwifiex_set_11ac_ba_params(priv);
	else
		mwifiex_set_ba_params(priv);

	memcpy(&current_bssid,
	       &priv->curr_bss_params.bss_descriptor.mac_address,
	       sizeof(current_bssid));

	/* Clear any past association response stored for application
	   retrieval */
	priv->assoc_rsp_size = 0;

	return mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_ASSOCIATE,
				    HostCmd_ACT_GEN_SET, 0, bss_desc);
}

/*
 * This function cleans up the SDIO driver.
 *
 * The following major steps are followed for cleanup -
 *      - Resume the device if its suspended
 *      - Disconnect the device if connected
 *      - Shutdown the firmware
 *      - Unregister the device from SDIO bus.
 */
static void
mwifiex_sdio_cleanup_module(void)
{
	struct mwifiex_adapter *adapter = g_adapter;
	int i;

	if (down_interruptible(&add_remove_card_sem))
		goto exit_sem_err;

	if (!adapter || !adapter->priv_num)
		goto exit;

	if (adapter->is_suspended)
		mwifiex_sdio_resume(adapter->dev);

	for (i = 0; i < adapter->priv_num; i++)
		if ((GET_BSS_ROLE(adapter->priv[i]) == MWIFIEX_BSS_ROLE_STA) &&
		    adapter->priv[i]->media_connected)
			mwifiex_deauthenticate(adapter->priv[i], NULL);

	if (!adapter->surprise_removed)
		mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
							  MWIFIEX_BSS_ROLE_ANY),
					 MWIFIEX_FUNC_SHUTDOWN);

exit:
	up(&add_remove_card_sem);

exit_sem_err:
	sdio_unregister_driver(&mwifiex_sdio);
}

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

	return mwifiex_sta_init_cmd(priv, false);
}

/*
 * This function sends a packet to device.
 *
 * It processes the packet to add the TxPD, checks condition and
 * sends the processed packet to firmware for transmission.
 *
 * On successful completion, the function calls the completion callback
 * and logs the time.
 */
int mwifiex_process_tx(struct mwifiex_private *priv, struct sk_buff *skb,
		       struct mwifiex_tx_param *tx_param)
{
	int ret = -1;
	struct mwifiex_adapter *adapter = priv->adapter;
	u8 *head_ptr;
	struct txpd *local_tx_pd = NULL;

	head_ptr = (u8 *) mwifiex_process_sta_txpd(priv, skb);
	if (head_ptr) {
		if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
			local_tx_pd =
				(struct txpd *) (head_ptr + INTF_HEADER_LEN);

		ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
					     skb->data, skb->len, tx_param);
	}

	switch (ret) {
	case -EBUSY:
		if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
			(adapter->pps_uapsd_mode) &&
			(adapter->tx_lock_flag)) {
				priv->adapter->tx_lock_flag = false;
				local_tx_pd->flags = 0;
		}
		dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
		break;
	case -1:
		adapter->data_sent = false;
		dev_err(adapter->dev, "mwifiex_write_data_async failed: 0x%X\n",
		       ret);
		adapter->dbg.num_tx_host_to_card_failure++;
		mwifiex_write_data_complete(adapter, skb, ret);
		break;
	case -EINPROGRESS:
		adapter->data_sent = false;
		break;
	case 0:
		mwifiex_write_data_complete(adapter, skb, ret);
		break;
	default:
		break;
	}

	return ret;
}

/* Enable or disable the 11h extensions in the firmware */
int mwifiex_11h_activate(struct mwifiex_private *priv, bool flag)
{
	u32 enable = flag;

	/* enable master mode radar detection on AP interface */
	if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) && enable)
		enable |= MWIFIEX_MASTER_RADAR_DET_MASK;

	return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_SNMP_MIB,
				HostCmd_ACT_GEN_SET, DOT11H_I, &enable, true);
}

/*
 * Adds TxPD to AMSDU header.
 *
 * Each AMSDU packet will contain one TxPD at the beginning,
 * followed by multiple AMSDU subframes.
 */
static void
mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv,
			    struct sk_buff *skb)
{
	struct txpd *local_tx_pd;
	struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
	unsigned int pad;
	int headroom = (priv->adapter->iface_type ==
			MWIFIEX_USB) ? 0 : INTF_HEADER_LEN;

	pad = ((void *)skb->data - sizeof(*local_tx_pd) -
		headroom - NULL) & (MWIFIEX_DMA_ALIGN_SZ - 1);
	skb_push(skb, pad);

	skb_push(skb, sizeof(*local_tx_pd));

	local_tx_pd = (struct txpd *) skb->data;
	memset(local_tx_pd, 0, sizeof(struct txpd));

	/* Original priority has been overwritten */
	local_tx_pd->priority = (u8) skb->priority;
	local_tx_pd->pkt_delay_2ms =
		mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
	local_tx_pd->bss_num = priv->bss_num;
	local_tx_pd->bss_type = priv->bss_type;
	/* Always zero as the data is followed by struct txpd */
	local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd) +
						 pad);
	local_tx_pd->tx_pkt_type = cpu_to_le16(PKT_TYPE_AMSDU);
	local_tx_pd->tx_pkt_length = cpu_to_le16(skb->len -
						 sizeof(*local_tx_pd) -
						 pad);

	if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT)
		local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET;

	if (local_tx_pd->tx_control == 0)
		/* TxCtrl set by user or default */
		local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);

	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
	    priv->adapter->pps_uapsd_mode) {
		if (true == mwifiex_check_last_packet_indication(priv)) {
			priv->adapter->tx_lock_flag = true;
			local_tx_pd->flags =
				MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
		}
	}
}

/**
 *  @brief This function will process the rx packet and 
 *  		forward it to kernel/upper layer
 *  
 *  @param priv    	A pointer to mlan_private
 *  @param payload  A pointer to rx packet payload
 *
 *  @return 	   	MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE
 */
static mlan_status
wlan_11n_dispatch_pkt(t_void * priv, t_void * payload)
{
    mlan_status ret = MLAN_STATUS_SUCCESS;
#ifdef STA_SUPPORT
    pmlan_adapter pmadapter = ((pmlan_private) priv)->adapter;
#endif
#ifdef UAP_SUPPORT
    if (GET_BSS_ROLE((mlan_private *) priv) == MLAN_BSS_ROLE_UAP)
        return wlan_process_uap_rx_packet(priv, (pmlan_buffer) payload);
#endif /* UAP_SUPPORT */
#ifdef STA_SUPPORT
    ret = wlan_process_rx_packet(pmadapter, (pmlan_buffer) payload);
#endif
    return ret;
}

static void mwifiex_usb_disconnect(struct usb_interface *intf)
{
	struct usb_card_rec *card = usb_get_intfdata(intf);
	struct mwifiex_adapter *adapter;
	int i;

	if (!card || !card->adapter) {
		pr_err("%s: card or card->adapter is NULL\n", __func__);
		return;
	}

	adapter = card->adapter;
	if (!adapter->priv_num)
		return;

	/* In case driver is removed when asynchronous FW downloading is
	 * in progress
	 */
	wait_for_completion(&adapter->fw_load);

	if (user_rmmod) {
#ifdef CONFIG_PM
		if (adapter->is_suspended)
			mwifiex_usb_resume(intf);
#endif
		for (i = 0; i < adapter->priv_num; i++)
			if ((GET_BSS_ROLE(adapter->priv[i]) ==
			     MWIFIEX_BSS_ROLE_STA) &&
			    adapter->priv[i]->media_connected)
				mwifiex_deauthenticate(adapter->priv[i], NULL);

		mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
							  MWIFIEX_BSS_ROLE_ANY),
					 MWIFIEX_FUNC_SHUTDOWN);
	}

	mwifiex_usb_free(card);

	dev_dbg(adapter->dev, "%s: removing card\n", __func__);
	mwifiex_remove_card(adapter, &add_remove_card_sem);

	usb_set_intfdata(intf, NULL);
	usb_put_dev(interface_to_usbdev(intf));
	kfree(card);

	return;
}

/*
 * Packet send completion callback handler.
 *
 * It either frees the buffer directly or forwards it to another
 * completion callback which checks conditions, updates statistics,
 * wakes up stalled traffic queue if required, and then frees the buffer.
 */
int mwifiex_write_data_complete(struct mwifiex_adapter *adapter,
				struct sk_buff *skb, int status)
{
	struct mwifiex_private *priv, *tpriv;
	struct mwifiex_txinfo *tx_info;
	int i;

	if (!skb)
		return 0;

	tx_info = MWIFIEX_SKB_TXCB(skb);
	priv = mwifiex_get_priv_by_id(adapter, tx_info->bss_num,
				      tx_info->bss_type);
	if (!priv)
		goto done;

	mwifiex_set_trans_start(priv->netdev);
	if (!status) {
		priv->stats.tx_packets++;
		priv->stats.tx_bytes += skb->len;
	} else {
		priv->stats.tx_errors++;
	}

	if (atomic_dec_return(&adapter->tx_pending) >= LOW_TX_PENDING)
		goto done;

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

		tpriv = adapter->priv[i];

		if ((GET_BSS_ROLE(tpriv) == MWIFIEX_BSS_ROLE_STA) &&
		    (tpriv->media_connected)) {
			if (netif_queue_stopped(tpriv->netdev))
				mwifiex_wake_up_net_dev_queue(tpriv->netdev,
							      adapter);
		}
	}
done:
	dev_kfree_skb_any(skb);

	return 0;
}

/**
 *  @brief Update the TxPktLength field in TxPD after the complete AMSDU
 *  packet is formed
 *
 *  @param priv     A pointer to mlan_private structure
 *  @param mbuf     TxPD buffer
 *
 *  @return         N/A
 */
static INLINE void
wlan_11n_update_pktlen_amsdu_txpd(mlan_private * priv, pmlan_buffer mbuf)
{
	TxPD *ptx_pd;
	ENTER();

	ptx_pd = (TxPD *) mbuf->pbuf;
	ptx_pd->tx_pkt_length =
		(t_u16) wlan_cpu_to_le16(mbuf->data_len - sizeof(TxPD));
#ifdef STA_SUPPORT
	if ((GET_BSS_ROLE(priv) == MLAN_BSS_ROLE_STA) &&
	    (priv->adapter->pps_uapsd_mode)) {
		if (MTRUE == wlan_check_last_packet_indication(priv)) {
			priv->adapter->tx_lock_flag = MTRUE;
			ptx_pd->flags |= MRVDRV_TxPD_POWER_MGMT_LAST_PACKET;
		}
	}
#endif /* STA_SUPPORT */
	LEAVE();
}

void mwifiex_process_tx_pause_event(struct mwifiex_private *priv,
				    struct sk_buff *event_skb)
{
	struct mwifiex_ie_types_header *tlv;
	u16 tlv_type, tlv_len;
	int tlv_buf_left;

	if (!priv->media_connected) {
		mwifiex_dbg(priv->adapter, ERROR,
			    "tx_pause event while disconnected; bss_role=%d\n",
			    priv->bss_role);
		return;
	}

	tlv_buf_left = event_skb->len - sizeof(u32);
	tlv = (void *)event_skb->data + sizeof(u32);

	while (tlv_buf_left >= (int)sizeof(struct mwifiex_ie_types_header)) {
		tlv_type = le16_to_cpu(tlv->type);
		tlv_len  = le16_to_cpu(tlv->len);
		if ((sizeof(struct mwifiex_ie_types_header) + tlv_len) >
		    tlv_buf_left) {
			mwifiex_dbg(priv->adapter, ERROR,
				    "wrong tlv: tlvLen=%d, tlvBufLeft=%d\n",
				    tlv_len, tlv_buf_left);
			break;
		}
		if (tlv_type == TLV_TYPE_TX_PAUSE) {
			if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
				mwifiex_process_sta_tx_pause(priv, tlv);
			else
				mwifiex_process_uap_tx_pause(priv, tlv);
		}

		tlv_buf_left -= sizeof(struct mwifiex_ie_types_header) +
				tlv_len;
		tlv = (void *)((u8 *)tlv + tlv_len +
			       sizeof(struct mwifiex_ie_types_header));
	}

}

/*
 * SDIO remove.
 *
 * This function removes the interface and frees up the card structure.
 */
static void
mwifiex_sdio_remove(struct sdio_func *func)
{
	struct sdio_mmc_card *card;
	struct mwifiex_adapter *adapter;
	struct mwifiex_private *priv;
	int i;

	pr_debug("info: SDIO func num=%d\n", func->num);

	card = sdio_get_drvdata(func);
	if (!card)
		return;

	adapter = card->adapter;
	if (!adapter || !adapter->priv_num)
		return;

	/* In case driver is removed when asynchronous FW load is in progress */
	wait_for_completion(&adapter->fw_load);

	if (user_rmmod) {
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,34))
		if (adapter->is_suspended)
			mwifiex_sdio_resume(adapter->dev);
#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,34)) */

		for (i = 0; i < adapter->priv_num; i++)
			if ((GET_BSS_ROLE(adapter->priv[i]) ==
						MWIFIEX_BSS_ROLE_STA) &&
			    adapter->priv[i]->media_connected)
				mwifiex_deauthenticate(adapter->priv[i], NULL);

		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
		mwifiex_disable_auto_ds(priv);
		mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
	}

	mwifiex_remove_card(card->adapter, &add_remove_card_sem);
	kfree(card);
}

static void mwifiex_pcie_remove(struct pci_dev *pdev)
{
	struct pcie_service_card *card;
	struct mwifiex_adapter *adapter;
	struct mwifiex_private *priv;
	int i;

	card = pci_get_drvdata(pdev);
	if (!card)
		return;

	adapter = card->adapter;
	if (!adapter || !adapter->priv_num)
		return;

	if (user_rmmod) {
#ifdef CONFIG_PM
		if (adapter->is_suspended)
			mwifiex_pcie_resume(pdev);
#endif

		for (i = 0; i < adapter->priv_num; i++)
			if ((GET_BSS_ROLE(adapter->priv[i]) ==
			     MWIFIEX_BSS_ROLE_STA) &&
			    adapter->priv[i]->media_connected)
				mwifiex_deauthenticate(adapter->priv[i], NULL);

		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);

		mwifiex_disable_auto_ds(priv);

		mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
	}

	mwifiex_remove_card(card->adapter, &add_remove_card_sem);
	kfree(card);
}

static void
mwifiex_sdio_remove(struct sdio_func *func)
{
	struct sdio_mmc_card *card;
	struct mwifiex_adapter *adapter;
	struct mwifiex_private *priv;
	int i;

	pr_debug("info: SDIO func num=%d\n", func->num);

	card = sdio_get_drvdata(func);
	if (!card)
		return;

	adapter = card->adapter;
	if (!adapter || !adapter->priv_num)
		return;

	if (user_rmmod) {
		if (adapter->is_suspended)
			mwifiex_sdio_resume(adapter->dev);

		for (i = 0; i < adapter->priv_num; i++)
			if ((GET_BSS_ROLE(adapter->priv[i]) ==
						MWIFIEX_BSS_ROLE_STA) &&
			    adapter->priv[i]->media_connected)
				mwifiex_deauthenticate(adapter->priv[i], NULL);

		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
		mwifiex_disable_auto_ds(priv);
		mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
	}

	mwifiex_remove_card(card->adapter, &add_remove_card_sem);
	kfree(card);
}

/*
 * 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;
	encrypt_key.key_index = key_index;

	if (kp && kp->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
		encrypt_key.is_igtk_key = true;

	if (!disable) {
		if (key_len)
			memcpy(encrypt_key.key_material, key, key_len);
		else
			encrypt_key.is_current_wep_key = true;

		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);
			encrypt_key.pn_len = kp->seq_len;
			encrypt_key.is_rx_seq_valid = true;
		}
	} else {
		if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP)
			return 0;
		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);
}

/*
 * Adds TxPD to AMSDU header.
 *
 * Each AMSDU packet will contain one TxPD at the beginning,
 * followed by multiple AMSDU subframes.
 */
static void
mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv,
			    struct sk_buff *skb)
{
	struct txpd *local_tx_pd;

	skb_push(skb, sizeof(*local_tx_pd));

	local_tx_pd = (struct txpd *) skb->data;
	memset(local_tx_pd, 0, sizeof(struct txpd));

	/* Original priority has been overwritten */
	local_tx_pd->priority = (u8) skb->priority;
	local_tx_pd->pkt_delay_2ms =
		mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
	local_tx_pd->bss_num = priv->bss_num;
	local_tx_pd->bss_type = priv->bss_type;
	/* Always zero as the data is followed by struct txpd */
	local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
	local_tx_pd->tx_pkt_type = cpu_to_le16(PKT_TYPE_AMSDU);
	local_tx_pd->tx_pkt_length = cpu_to_le16(skb->len -
			sizeof(*local_tx_pd));

	if (local_tx_pd->tx_control == 0)
		/* TxCtrl set by user or default */
		local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);

	if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
		(priv->adapter->pps_uapsd_mode)) {
		if (true == mwifiex_check_last_packet_indication(priv)) {
			priv->adapter->tx_lock_flag = true;
			local_tx_pd->flags =
				MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
		}
	}
}