drivers/staging/csr/unifi_pdu_processing.c



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/*
 * ---------------------------------------------------------------------------
 * FILE:     unifi_pdu_processing.c
 *
 * PURPOSE:
 *      This file provides the PDU handling functionality before it gets sent to unfi and after
 *      receiving a PDU from unifi
 *
 * Copyright (C) 2010 by Cambridge Silicon Radio Ltd.
 *
 * Refer to LICENSE.txt included with this source code for details on
 * the license terms.
 *
 * ---------------------------------------------------------------------------
 */

#include <linux/types.h>
#include <linux/etherdevice.h>
#include <linux/vmalloc.h>

#include "csr_wifi_hip_unifi.h"
#include "csr_wifi_hip_conversions.h"
#include "csr_time.h"
#include "unifi_priv.h"
#include <net/pkt_sched.h>

#ifdef CSR_SUPPORT_SME
static void _update_buffered_pkt_params_after_alignment(unifi_priv_t *priv, bulk_data_param_t *bulkdata,
                                                        tx_buffered_packets_t* buffered_pkt)
{
    struct sk_buff *skb ;
    u32 align_offset;

    if (priv == NULL || bulkdata == NULL || buffered_pkt == NULL){
        return;
    }

    skb = (struct sk_buff*)bulkdata->d[0].os_net_buf_ptr;
    align_offset = (u32)(long)(bulkdata->d[0].os_data_ptr) & (CSR_WIFI_ALIGN_BYTES-1);
    if(align_offset){
        skb_pull(skb,align_offset);
    }

    buffered_pkt->bulkdata.os_data_ptr = bulkdata->d[0].os_data_ptr;
    buffered_pkt->bulkdata.data_length = bulkdata->d[0].data_length;
    buffered_pkt->bulkdata.os_net_buf_ptr = bulkdata->d[0].os_net_buf_ptr;
    buffered_pkt->bulkdata.net_buf_length = bulkdata->d[0].net_buf_length;
}
#endif

void
unifi_frame_ma_packet_req(unifi_priv_t *priv, CSR_PRIORITY priority,
                          CSR_RATE TransmitRate, CSR_CLIENT_TAG hostTag,
                          u16 interfaceTag, CSR_TRANSMISSION_CONTROL transmissionControl,
                          CSR_PROCESS_ID leSenderProcessId, u8 *peerMacAddress,
                          CSR_SIGNAL *signal)
{

    CSR_MA_PACKET_REQUEST *req = &signal->u.MaPacketRequest;
    netInterface_priv_t *interfacePriv;
    u8 ba_session_idx = 0;
    ba_session_tx_struct *ba_session = NULL;
    u8 *ba_addr = NULL;

    interfacePriv = priv->interfacePriv[interfaceTag];

	unifi_trace(priv, UDBG5,
		"In unifi_frame_ma_packet_req, Frame for Peer: %pMF\n",
		peerMacAddress);
    signal->SignalPrimitiveHeader.SignalId = CSR_MA_PACKET_REQUEST_ID;
    signal->SignalPrimitiveHeader.ReceiverProcessId = 0;
    signal->SignalPrimitiveHeader.SenderProcessId = leSenderProcessId;

    /* Fill the MA-PACKET.req */
    req->Priority = priority;
    unifi_trace(priv, UDBG3, "Tx Frame with Priority: 0x%x\n", req->Priority);

    /* A value of 0 is used for auto selection of rates. But for P2P GO case
     * for action frames the rate is governed by SME. Hence instead of 0,
     * the rate is filled in with the value passed here
     */
    req->TransmitRate = TransmitRate;

    /* packets from netdev then no confirm required but packets from
     * Nme/Sme eapol data frames requires the confirmation
     */
    req->TransmissionControl = transmissionControl;
    req->VirtualInterfaceIdentifier =
           uf_get_vif_identifier(interfacePriv->interfaceMode,interfaceTag);
    memcpy(req->Ra.x, peerMacAddress, ETH_ALEN);

    if (hostTag == 0xffffffff) {
        req->HostTag = interfacePriv->tag++;
        req->HostTag |= 0x40000000;
        unifi_trace(priv, UDBG3, "new host tag assigned = 0x%x\n", req->HostTag);
        interfacePriv->tag &= 0x0fffffff;
    } else {
        req->HostTag = hostTag;
        unifi_trace(priv, UDBG3, "host tag got from SME  = 0x%x\n", req->HostTag);
    }
    /* check if BA session exists for the peer MAC address on same tID */
    if(interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_AP ||
       interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_P2PGO){
        ba_addr = peerMacAddress;
    }else{
        ba_addr = interfacePriv->bssid.a;
    }
    for (ba_session_idx=0; ba_session_idx < MAX_SUPPORTED_BA_SESSIONS_TX; ba_session_idx++){
        ba_session = interfacePriv->ba_session_tx[ba_session_idx];
        if (ba_session){
           if ((!memcmp(ba_session->macAddress.a, ba_addr, ETH_ALEN)) && (ba_session->tID == priority)){
                req->TransmissionControl |= CSR_ALLOW_BA;
                break;
            }
        }
    }

    unifi_trace(priv, UDBG5, "leaving unifi_frame_ma_packet_req\n");
}

#ifdef CSR_SUPPORT_SME

#define TRANSMISSION_CONTROL_TRIGGER_MASK 0x0001
#define TRANSMISSION_CONTROL_EOSP_MASK 0x0002

static
int frame_and_send_queued_pdu(unifi_priv_t* priv,tx_buffered_packets_t* buffered_pkt,
            CsrWifiRouterCtrlStaInfo_t *staRecord,u8 moreData , u8 eosp)
{

    CSR_SIGNAL signal;
    bulk_data_param_t bulkdata;
    int result;
    u8 toDs, fromDs, macHeaderLengthInBytes = MAC_HEADER_SIZE;
    u8 *qc;
    u16 *fc = (u16*)(buffered_pkt->bulkdata.os_data_ptr);
    unsigned long lock_flags;
    unifi_trace(priv, UDBG3, "frame_and_send_queued_pdu with moreData: %d , EOSP: %d\n",moreData,eosp);
    unifi_frame_ma_packet_req(priv, buffered_pkt->priority, buffered_pkt->rate, buffered_pkt->hostTag,
               buffered_pkt->interfaceTag, buffered_pkt->transmissionControl,
               buffered_pkt->leSenderProcessId, buffered_pkt->peerMacAddress.a, &signal);
    bulkdata.d[0].os_data_ptr = buffered_pkt->bulkdata.os_data_ptr;
    bulkdata.d[0].data_length = buffered_pkt->bulkdata.data_length;
    bulkdata.d[0].os_net_buf_ptr = buffered_pkt->bulkdata.os_net_buf_ptr;
    bulkdata.d[0].net_buf_length = buffered_pkt->bulkdata.net_buf_length;
    bulkdata.d[1].os_data_ptr = NULL;
    bulkdata.d[1].data_length = 0;
    bulkdata.d[1].os_net_buf_ptr =0;
    bulkdata.d[1].net_buf_length =0;

    if(moreData) {
        *fc |= cpu_to_le16(IEEE802_11_FC_MOREDATA_MASK);
    } else {
        *fc &= cpu_to_le16(~IEEE802_11_FC_MOREDATA_MASK);
    }

    if((staRecord != NULL)&& (staRecord->wmmOrQosEnabled == TRUE))
    {
        unifi_trace(priv, UDBG3, "frame_and_send_queued_pdu WMM Enabled: %d \n",staRecord->wmmOrQosEnabled);

        toDs = (*fc & cpu_to_le16(IEEE802_11_FC_TO_DS_MASK))?1 : 0;
        fromDs = (*fc & cpu_to_le16(IEEE802_11_FC_FROM_DS_MASK))? 1: 0;

        switch(le16_to_cpu(*fc) & IEEE80211_FC_SUBTYPE_MASK)
        {
            case IEEE802_11_FC_TYPE_QOS_DATA & IEEE80211_FC_SUBTYPE_MASK:
            case IEEE802_11_FC_TYPE_QOS_NULL & IEEE80211_FC_SUBTYPE_MASK:
                /* If both are set then the Address4 exists (only for AP) */
                if (fromDs && toDs) {
                    /* 6 is the size of Address4 field */
                    macHeaderLengthInBytes += (QOS_CONTROL_HEADER_SIZE + 6);
                } else {
                    macHeaderLengthInBytes += QOS_CONTROL_HEADER_SIZE;
                }

                /* If order bit set then HT control field is the part of MAC header */
                if (*fc & cpu_to_le16(IEEE80211_FC_ORDER_MASK)) {
                    macHeaderLengthInBytes += HT_CONTROL_HEADER_SIZE;
                    qc = (u8*)(buffered_pkt->bulkdata.os_data_ptr + (macHeaderLengthInBytes-6));
                } else {
                    qc = (u8*)(buffered_pkt->bulkdata.os_data_ptr + (macHeaderLengthInBytes-2));
                }
                *qc = eosp ? *qc | (1 << 4) : *qc & (~(1 << 4));
                break;
            default:
                if (fromDs && toDs)
                    macHeaderLengthInBytes += 6;
        }

    }
    result = ul_send_signal_unpacked(priv, &signal, &bulkdata);
    if(result){
        _update_buffered_pkt_params_after_alignment(priv, &bulkdata,buffered_pkt);
    }

 /* Decrement the packet counts queued in driver */
    if (result != -ENOSPC) {
        /* protect entire counter updation by disabling preemption */
        if (!priv->noOfPktQueuedInDriver) {
            unifi_error(priv, "packets queued in driver 0 still decrementing\n");
        } else {
            spin_lock_irqsave(&priv->tx_q_lock,lock_flags);
            priv->noOfPktQueuedInDriver--;
            spin_unlock_irqrestore(&priv->tx_q_lock,lock_flags);
        }
        /* Sta Record is available for all unicast (except genericMgt Frames) & in other case its NULL */
        if (staRecord) {
            spin_lock_irqsave(&priv->staRecord_lock,lock_flags);
            if (!staRecord->noOfPktQueued) {
                unifi_error(priv, "packets queued in driver per station is 0 still decrementing\n");
            } else {
                staRecord->noOfPktQueued--;
            }
            /* if the STA alive probe frame has failed then reset the saved host tag */
            if (result){
                if (staRecord->nullDataHostTag == buffered_pkt->hostTag){
                    staRecord->nullDataHostTag = INVALID_HOST_TAG;
                }
            }
            spin_unlock_irqrestore(&priv->staRecord_lock,lock_flags);
        }

    }
    return result;
}
#ifdef CSR_SUPPORT_SME
static
void set_eosp_transmit_ctrl(unifi_priv_t *priv, struct list_head *txList)
{
    /* dequeue the tx data packets from the appropriate queue */
    tx_buffered_packets_t *tx_q_item = NULL;
    struct list_head *listHead;
    struct list_head *placeHolder;
    unsigned long lock_flags;


    unifi_trace(priv, UDBG5, "entering set_eosp_transmit_ctrl\n");
    /* check for list empty */
    if (list_empty(txList)) {
        unifi_warning(priv, "In set_eosp_transmit_ctrl, the list is empty\n");
        return;
    }

    /* return the last node , and modify it. */

    spin_lock_irqsave(&priv->tx_q_lock,lock_flags);
    list_for_each_prev_safe(listHead, placeHolder, txList) {
        tx_q_item = list_entry(listHead, tx_buffered_packets_t, q);
        tx_q_item->transmissionControl |= TRANSMISSION_CONTROL_EOSP_MASK;
        tx_q_item->transmissionControl = (tx_q_item->transmissionControl & ~(CSR_NO_CONFIRM_REQUIRED));
        unifi_trace(priv, UDBG1,
                "set_eosp_transmit_ctrl Transmission Control = 0x%x hostTag = 0x%x \n",tx_q_item->transmissionControl,tx_q_item->hostTag);
        unifi_trace(priv,UDBG3,"in set_eosp_transmit_ctrl no.of buffered frames %d\n",priv->noOfPktQueuedInDriver);
        break;
    }
    spin_unlock_irqrestore(&priv->tx_q_lock,lock_flags);
    unifi_trace(priv, UDBG1,"List Empty %d\n",list_empty(txList));
    unifi_trace(priv, UDBG5, "leaving set_eosp_transmit_ctrl\n");
    return;
}

static
void send_vif_availibility_rsp(unifi_priv_t *priv,CSR_VIF_IDENTIFIER vif,CSR_RESULT_CODE resultCode)
{
    CSR_SIGNAL signal;
    CSR_MA_VIF_AVAILABILITY_RESPONSE *rsp;
    bulk_data_param_t *bulkdata = NULL;
    int r;

    unifi_trace(priv, UDBG3, "send_vif_availibility_rsp : invoked with resultCode = %d \n", resultCode);

    memset(&signal,0,sizeof(CSR_SIGNAL));
    rsp = &signal.u.MaVifAvailabilityResponse;
    rsp->VirtualInterfaceIdentifier = vif;
    rsp->ResultCode = resultCode;
    signal.SignalPrimitiveHeader.SignalId = CSR_MA_VIF_AVAILABILITY_RESPONSE_ID;
    signal.SignalPrimitiveHeader.ReceiverProcessId = 0;
    signal.SignalPrimitiveHeader.SenderProcessId = priv->netdev_client->sender_id;

    /* Send the signal to UniFi */
    r = ul_send_signal_unpacked(priv, &signal, bulkdata);
    if(r) {
        unifi_error(priv,"Availibility response sending failed %x status %d\n",vif,r);
    }
    else {
        unifi_trace(priv, UDBG3, "send_vif_availibility_rsp : status = %d \n", r);
    }
}
#endif

static
void verify_and_accomodate_tx_packet(unifi_priv_t *priv)
{
    tx_buffered_packets_t *tx_q_item;
    unsigned long lock_flags;
    struct list_head *listHead, *list;
    struct list_head *placeHolder;
    u8 i, j,eospFramedeleted=0;
    u8 thresholdExcedeDueToBroadcast = TRUE;
    /* it will be made it interface Specific in the future when multi interfaces are supported ,
    right now interface 0 is considered */
    netInterface_priv_t *interfacePriv = priv->interfacePriv[0];
    CsrWifiRouterCtrlStaInfo_t *staInfo = NULL;

    unifi_trace(priv, UDBG3, "entering verify_and_accomodate_tx_packet\n");

    for(i = 0; i < UNIFI_MAX_CONNECTIONS; i++) {
        staInfo = interfacePriv->staInfo[i];
            if (staInfo && (staInfo->noOfPktQueued >= CSR_WIFI_DRIVER_MAX_PKT_QUEUING_THRESHOLD_PER_PEER)) {
            /* remove the first(oldest) packet from the all the access catogory, since data
             * packets for station record crossed the threshold limit (64 for AP supporting
             * 8 peers)
             */
            unifi_trace(priv,UDBG3,"number of station pkts queued=  %d for sta id = %d\n", staInfo->noOfPktQueued, staInfo->aid);
            for(j = 0; j < MAX_ACCESS_CATOGORY; j++) {
                list = &staInfo->dataPdu[j];
                spin_lock_irqsave(&priv->tx_q_lock,lock_flags);
                list_for_each_safe(listHead, placeHolder, list) {
                    tx_q_item = list_entry(listHead, tx_buffered_packets_t, q);
                    list_del(listHead);
                    thresholdExcedeDueToBroadcast = FALSE;
                    unifi_net_data_free(priv, &tx_q_item->bulkdata);
                    kfree(tx_q_item);
                    tx_q_item = NULL;
                    if (!priv->noOfPktQueuedInDriver) {
                        unifi_error(priv, "packets queued in driver 0 still decrementing in %s\n", __FUNCTION__);
                    } else {
                        /* protection provided by spinlock */
                        priv->noOfPktQueuedInDriver--;

                    }
                    /* Sta Record is available for all unicast (except genericMgt Frames) & in other case its NULL */
                    if (!staInfo->noOfPktQueued) {
                        unifi_error(priv, "packets queued in driver per station is 0 still decrementing in %s\n", __FUNCTION__);
                    } else {
                        spin_lock(&priv->staRecord_lock);
                        staInfo->noOfPktQueued--;
                        spin_unlock(&priv->staRecord_lock);
                    }
                    break;
                }
                spin_unlock_irqrestore(&priv->tx_q_lock,lock_flags);
            }
        }
    }
    if (thresholdExcedeDueToBroadcast &&  interfacePriv->noOfbroadcastPktQueued > CSR_WIFI_DRIVER_MINIMUM_BROADCAST_PKT_THRESHOLD ) {
        /* Remove the packets from genericMulticastOrBroadCastFrames queue
         * (the max packets in driver is reached due to broadcast/multicast frames)
         */
        spin_lock_irqsave(&priv->tx_q_lock,lock_flags);
        list_for_each_safe(listHead, placeHolder, &interfacePriv->genericMulticastOrBroadCastFrames) {
            tx_q_item = list_entry(listHead, tx_buffered_packets_t, q);
            if(eospFramedeleted){
                tx_q_item->transmissionControl |= TRANSMISSION_CONTROL_EOSP_MASK;
                tx_q_item->transmissionControl = (tx_q_item->transmissionControl & ~(CSR_NO_CONFIRM_REQUIRED));
                unifi_trace(priv, UDBG1,"updating eosp for next packet hostTag:= 0x%x ",tx_q_item->hostTag);
                eospFramedeleted =0;
                break;
            }

            if(tx_q_item->transmissionControl & TRANSMISSION_CONTROL_EOSP_MASK ){
               eospFramedeleted = 1;
            }
            unifi_trace(priv,UDBG1, "freeing of multicast packets ToC = 0x%x hostTag = 0x%x \n",tx_q_item->transmissionControl,tx_q_item->hostTag);
            list_del(listHead);
            unifi_net_data_free(priv, &tx_q_item->bulkdata);
            kfree(tx_q_item);
            priv->noOfPktQueuedInDriver--;
            spin_lock(&priv->staRecord_lock);
            interfacePriv->noOfbroadcastPktQueued--;
            spin_unlock(&priv->staRecord_lock);
            if(!eospFramedeleted){
                break;
            }
        }
        spin_unlock_irqrestore(&priv->tx_q_lock,lock_flags);
    }
    unifi_trace(priv, UDBG3, "leaving verify_and_accomodate_tx_packet\n");
}

static
CsrResult enque_tx_data_pdu(unifi_priv_t *priv, bulk_data_param_t *bulkdata,
                            struct list_head *list, CSR_SIGNAL *signal,
                            u8 requeueOnSamePos)
{

    /* queue the tx data packets on to appropriate queue */
    CSR_MA_PACKET_REQUEST *req = &signal->u.MaPacketRequest;
    tx_buffered_packets_t *tx_q_item;
    unsigned long lock_flags;

    unifi_trace(priv, UDBG5, "entering enque_tx_data_pdu\n");
    if(!list) {
       unifi_error(priv,"List is not specified\n");
       return CSR_RESULT_FAILURE;
    }

    /* Removes aged packets & adds the incoming packet */
    if (priv->noOfPktQueuedInDriver >= CSR_WIFI_DRIVER_SUPPORT_FOR_MAX_PKT_QUEUEING) {
        unifi_trace(priv,UDBG3,"number of pkts queued=  %d \n", priv->noOfPktQueuedInDriver);
        verify_and_accomodate_tx_packet(priv);
    }


    tx_q_item = (tx_buffered_packets_t *)kmalloc(sizeof(tx_buffered_packets_t), GFP_ATOMIC);
    if (tx_q_item == NULL) {
        unifi_error(priv,
                "Failed to allocate %d bytes for tx packet record\n",
                sizeof(tx_buffered_packets_t));
        return CSR_RESULT_FAILURE;
    }

    /* disable the preemption */
    spin_lock_irqsave(&priv->tx_q_lock,lock_flags);
    INIT_LIST_HEAD(&tx_q_item->q);
    /* fill the tx_q structure members */
    tx_q_item->bulkdata.os_data_ptr = bulkdata->d[0].os_data_ptr;
    tx_q_item->bulkdata.data_length = bulkdata->d[0].data_length;
    tx_q_item->bulkdata.os_net_buf_ptr = bulkdata->d[0].os_net_buf_ptr;
    tx_q_item->bulkdata.net_buf_length = bulkdata->d[0].net_buf_length;
    tx_q_item->interfaceTag = req->VirtualInterfaceIdentifier & 0xff;
    tx_q_item->hostTag = req->HostTag;
    tx_q_item->leSenderProcessId = signal->SignalPrimitiveHeader.SenderProcessId;
    tx_q_item->transmissionControl = req->TransmissionControl;
    tx_q_item->priority = req->Priority;
    tx_q_item->rate = req->TransmitRate;
    memcpy(tx_q_item->peerMacAddress.a, req->Ra.x, ETH_ALEN);


    if (requeueOnSamePos) {
        list_add(&tx_q_item->q, list);
    } else {
        list_add_tail(&tx_q_item->q, list);
    }

    /* Count of packet queued in driver */
    priv->noOfPktQueuedInDriver++;
    spin_unlock_irqrestore(&priv->tx_q_lock,lock_flags);
    unifi_trace(priv, UDBG5, "leaving enque_tx_data_pdu\n");
    return CSR_RESULT_SUCCESS;
}

#ifdef CSR_WIFI_REQUEUE_PACKET_TO_HAL
CsrResult unifi_reque_ma_packet_request (void *ospriv, u32 host_tag,
                                         u16 txStatus, bulk_data_desc_t *bulkDataDesc)
{
    CsrResult status = CSR_RESULT_SUCCESS;
    unifi_priv_t *priv = (unifi_priv_t*)ospriv;
    netInterface_priv_t *interfacePriv;
    struct list_head *list = NULL;
    CsrWifiRouterCtrlStaInfo_t *staRecord = NULL;
    bulk_data_param_t bulkData;
    CSR_SIGNAL signal;
    CSR_PRIORITY priority = 0;
    u16 interfaceTag = 0;
    unifi_TrafficQueue priority_q;
    u16 frameControl = 0, frameType = 0;
    unsigned long lock_flags;

    interfacePriv = priv->interfacePriv[interfaceTag];

    /* If the current mode is not AP or P2PGO then just return failure
     * to clear the hip slot
     */
    if(!((interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_AP) ||
        (interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_P2PGO))) {
        return CSR_RESULT_FAILURE;
    }

    unifi_trace(priv, UDBG6, "unifi_reque_ma_packet_request: host_tag = 0x%x\n", host_tag);

    staRecord = CsrWifiRouterCtrlGetStationRecordFromPeerMacAddress(priv,
                                                                    (((u8 *) bulkDataDesc->os_data_ptr) + 4),
                                                                    interfaceTag);
    if (NULL == staRecord) {
        unifi_trace(priv, UDBG5, "unifi_reque_ma_packet_request: Invalid STA record \n");
        return CSR_RESULT_FAILURE;
    }

    /* Update TIM if MA-PACKET.cfm fails with status as Tx-retry-limit or No-BSS and then just return failure
     * to clear the hip slot associated with the Packet
     */
    if (CSR_TX_RETRY_LIMIT == txStatus || CSR_TX_NO_BSS == txStatus) {
        if (staRecord->timSet == CSR_WIFI_TIM_RESET || staRecord->timSet == CSR_WIFI_TIM_RESETTING)
        {
            unifi_trace(priv, UDBG2, "unifi_reque_ma_packet_request: CFM failed with Retry Limit or No BSS-->update TIM\n");
            if (!staRecord->timRequestPendingFlag) {
                update_tim(priv, staRecord->aid, 1, interfaceTag, staRecord->assignedHandle);
            }
            else {
                /* Cache the TimSet value so that it will processed immidiatly after
                 * completing the current setTim Request
                 */
                staRecord->updateTimReqQueued = 1;
                unifi_trace(priv, UDBG6, "unifi_reque_ma_packet_request: One more UpdateTim Request(:%d)Queued for AID %x\n",
                                         staRecord->updateTimReqQueued, staRecord->aid);
            }
        }
        return CSR_RESULT_FAILURE;
    }
    else if ((CSR_TX_LIFETIME == txStatus) ||  (CSR_TX_BLOCK_ACK_TIMEOUT == txStatus) ||
             (CSR_TX_FAIL_TRANSMISSION_VIF_INTERRUPTED == txStatus) ||
             (CSR_TX_REJECTED_PEER_STATION_SLEEPING == txStatus)    ||
             (CSR_TX_REJECTED_DTIM_STARTED == txStatus)) {
        /* Extract the Frame control and the frame type */
        frameControl = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(bulkDataDesc->os_data_ptr);
        frameType =  ((frameControl & IEEE80211_FC_TYPE_MASK) >> FRAME_CONTROL_TYPE_FIELD_OFFSET);

        /* Mgmt frames will not be re-queued for Tx
         * so just return failure to clear the hip slot
         */
        if (IEEE802_11_FRAMETYPE_MANAGEMENT == frameType) {
            return CSR_RESULT_FAILURE;
        }
        else if (IEEE802_11_FRAMETYPE_DATA == frameType) {
            /* QOS NULL and DATA NULL frames will not be re-queued for Tx
             * so just return failure to clear the hip slot
             */
            if ((((frameControl & IEEE80211_FC_SUBTYPE_MASK) >> FRAME_CONTROL_SUBTYPE_FIELD_OFFSET) == QOS_DATA_NULL) ||
                (((frameControl & IEEE80211_FC_SUBTYPE_MASK) >> FRAME_CONTROL_SUBTYPE_FIELD_OFFSET)== DATA_NULL )) {
                return CSR_RESULT_FAILURE;
            }
        }

        /* Extract the Packet priority */
        if (TRUE == staRecord->wmmOrQosEnabled) {
            u16 qosControl = 0;
            u8  dataFrameType = 0;

            dataFrameType =((frameControl & IEEE80211_FC_SUBTYPE_MASK) >> 4);

            if (dataFrameType == QOS_DATA) {
                /* QoS control field is offset from frame control by 2 (frame control)
                 * + 2 (duration/ID) + 2 (sequence control) + 3*ETH_ALEN or 4*ETH_ALEN
                 */
                if((frameControl & IEEE802_11_FC_TO_DS_MASK) && (frameControl & IEEE802_11_FC_FROM_DS_MASK)) {
                    qosControl= CSR_GET_UINT16_FROM_LITTLE_ENDIAN(bulkDataDesc->os_data_ptr + 30);
                }
                else {
                    qosControl = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(bulkDataDesc->os_data_ptr + 24);
                }
            }

            priority = (CSR_PRIORITY)(qosControl & IEEE802_11_QC_TID_MASK);

            if (priority < CSR_QOS_UP0 || priority > CSR_QOS_UP7) {
                unifi_trace(priv, UDBG5, "unifi_reque_ma_packet_request: Invalid priority:%x \n", priority);
                return CSR_RESULT_FAILURE;
            }
        }
        else {
            priority = CSR_CONTENTION;
        }

        /* Frame Bulk data to requeue it back to HAL Queues */
        bulkData.d[0].os_data_ptr    = bulkDataDesc->os_data_ptr;
        bulkData.d[0].data_length    = bulkDataDesc->data_length;
        bulkData.d[0].os_net_buf_ptr = bulkDataDesc->os_net_buf_ptr;
        bulkData.d[0].net_buf_length = bulkDataDesc->net_buf_length;

        bulkData.d[1].os_data_ptr    = NULL;
        bulkData.d[1].os_net_buf_ptr = NULL;
        bulkData.d[1].data_length    = bulkData.d[1].net_buf_length = 0;

        /* Initialize signal to zero */
        memset(&signal, 0, sizeof(CSR_SIGNAL));

        /* Frame MA Packet Req */
        unifi_frame_ma_packet_req(priv, priority, 0, host_tag,
                              interfaceTag, CSR_NO_CONFIRM_REQUIRED,
                              priv->netdev_client->sender_id,
                              staRecord->peerMacAddress.a, &signal);

        /* Find the Q-Priority */
        priority_q = unifi_frame_priority_to_queue(priority);
        list = &staRecord->dataPdu[priority_q];

        /* Place the Packet on to HAL Queue */
        status = enque_tx_data_pdu(priv, &bulkData, list, &signal, TRUE);

        /* Update the Per-station queued packet counter */
        if (!status) {
            spin_lock_irqsave(&priv->staRecord_lock, lock_flags);
            staRecord->noOfPktQueued++;
            spin_unlock_irqrestore(&priv->staRecord_lock, lock_flags);
        }
    }
    else {
        /* Packet will not be re-queued for any of the other MA Packet Tx failure
         * reasons so just return failure to clear the hip slot
         */
        return CSR_RESULT_FAILURE;
    }

    return status;
}
#endif

static void is_all_ac_deliver_enabled_and_moredata(CsrWifiRouterCtrlStaInfo_t *staRecord, u8 *allDeliveryEnabled, u8 *dataAvailable)
{
    u8 i;
    *allDeliveryEnabled = TRUE;
    for (i = 0 ;i < MAX_ACCESS_CATOGORY; i++) {
        if (!IS_DELIVERY_ENABLED(staRecord->powersaveMode[i])) {
            /* One is is not Delivery Enabled */
            *allDeliveryEnabled = FALSE;
            break;
        }
    }
    if (*allDeliveryEnabled) {
        *dataAvailable = (!list_empty(&staRecord->dataPdu[0]) || !list_empty(&staRecord->dataPdu[1])
                          ||!list_empty(&staRecord->dataPdu[2]) ||!list_empty(&staRecord->dataPdu[3])
                          ||!list_empty(&staRecord->mgtFrames));
    }
}

/*
 * ---------------------------------------------------------------------------
 *  uf_handle_tim_cfm
 *
 *
 *      This function updates tim status in host depending confirm status from firmware
 *
 *  Arguments:
 *      priv            Pointer to device private context struct
 *      cfm             CSR_MLME_SET_TIM_CONFIRM
 *      receiverProcessId SenderProcessID to fetch handle & timSet status
 *
 * ---------------------------------------------------------------------------
 */
void uf_handle_tim_cfm(unifi_priv_t *priv, CSR_MLME_SET_TIM_CONFIRM *cfm, u16 receiverProcessId)
{
    u8 handle = CSR_WIFI_GET_STATION_HANDLE_FROM_RECEIVER_ID(receiverProcessId);
    u8 timSetStatus = CSR_WIFI_GET_TIMSET_STATE_FROM_RECEIVER_ID(receiverProcessId);
    u16 interfaceTag = (cfm->VirtualInterfaceIdentifier & 0xff);
    netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
    CsrWifiRouterCtrlStaInfo_t *staRecord = NULL;
    /* This variable holds what TIM value we wanted to set in firmware */
    u16 timSetValue = 0;
    /* Irrespective of interface the count maintained */
    static u8 retryCount = 0;
    unsigned long lock_flags;
    unifi_trace(priv, UDBG3, "entering %s, handle = %x, timSetStatus = %x\n", __FUNCTION__, handle, timSetStatus);

    if (interfaceTag >= CSR_WIFI_NUM_INTERFACES) {
        unifi_warning(priv, "bad interfaceTag = %x\n", interfaceTag);
        return;
    }

    if ((handle != CSR_WIFI_BROADCAST_OR_MULTICAST_HANDLE) && (handle >= UNIFI_MAX_CONNECTIONS)) {
        unifi_warning(priv, "bad station Handle = %x\n", handle);
        return;
    }

    if (handle != CSR_WIFI_BROADCAST_OR_MULTICAST_HANDLE) {
        spin_lock_irqsave(&priv->staRecord_lock,lock_flags);
        if ((staRecord = ((CsrWifiRouterCtrlStaInfo_t *) (interfacePriv->staInfo[handle]))) == NULL) {
            spin_unlock_irqrestore(&priv->staRecord_lock,lock_flags);
            unifi_warning(priv, "uf_handle_tim_cfm: station record is NULL  handle = %x\n", handle);
            return;
        }
       spin_unlock_irqrestore(&priv->staRecord_lock,lock_flags);
    }
    switch(timSetStatus)
    {
        case CSR_WIFI_TIM_SETTING:
            timSetValue = CSR_WIFI_TIM_SET;
            break;
        case CSR_WIFI_TIM_RESETTING:
            timSetValue = CSR_WIFI_TIM_RESET;
            break;
        default:
            unifi_warning(priv, "timSet state is %x: Debug\n", timSetStatus);
            return;
    }

    /* check TIM confirm for success/failures */
    switch(cfm->ResultCode)
    {
        case CSR_RC_SUCCESS:
            if (handle != CSR_WIFI_BROADCAST_OR_MULTICAST_HANDLE) {
                /* Unicast frame & station record available */
                if (timSetStatus == staRecord->timSet) {
                    staRecord->timSet = timSetValue;
                    /* fh_cmd_q can also be full at some point of time!,
                     * resetting count as queue is cleaned by firmware at this point
                     */
                    retryCount = 0;
                    unifi_trace(priv, UDBG2, "tim (%s) successfully in firmware\n", (timSetValue)?"SET":"RESET");
                } else {
                    unifi_trace(priv, UDBG3, "receiver processID = %x, success: request & confirm states are not matching in TIM cfm: Debug status = %x, staRecord->timSet = %x, handle = %x\n",
                                 receiverProcessId, timSetStatus, staRecord->timSet, handle);
                }

                /* Reset TIM pending flag to send next TIM request */
                staRecord->timRequestPendingFlag = FALSE;

                /* Make sure that one more UpdateTim request is queued, if Queued its value
                 * should be CSR_WIFI_TIM_SET or CSR_WIFI_TIM_RESET
                 */
                if (0xFF != staRecord->updateTimReqQueued)
                {
                    /* Process the UpdateTim Request which is queued while previous UpdateTim was in progress */
                    if (staRecord->timSet != staRecord->updateTimReqQueued)
                    {
                       unifi_trace(priv, UDBG2, "uf_handle_tim_cfm : Processing Queued UpdateTimReq \n");

                       update_tim(priv, staRecord->aid, staRecord->updateTimReqQueued, interfaceTag, handle);

                       staRecord->updateTimReqQueued = 0xFF;
                    }
                }
            } else {

                interfacePriv->bcTimSet = timSetValue;
                /* fh_cmd_q can also be full at some point of time!,
                 * resetting count as queue is cleaned by firmware at this point
                 */
                retryCount = 0;
                unifi_trace(priv, UDBG3, "tim (%s) successfully for broadcast frame in firmware\n", (timSetValue)?"SET":"RESET");

                /* Reset DTIM pending flag to send next DTIM request */
                interfacePriv->bcTimSetReqPendingFlag = FALSE;

                /* Make sure that one more UpdateDTim request is queued, if Queued its value
                 * should be CSR_WIFI_TIM_SET or CSR_WIFI_TIM_RESET
                 */
                if (0xFF != interfacePriv->bcTimSetReqQueued)
                {
                    /* Process the UpdateTim Request which is queued while previous UpdateTim was in progress */
                    if (interfacePriv->bcTimSet != interfacePriv->bcTimSetReqQueued)
                    {
                        unifi_trace(priv, UDBG2, "uf_handle_tim_cfm : Processing Queued UpdateDTimReq \n");

                        update_tim(priv, 0, interfacePriv->bcTimSetReqQueued, interfaceTag, 0xFFFFFFFF);

                        interfacePriv->bcTimSetReqQueued = 0xFF;
                    }
                }

            }
            break;
        case CSR_RC_INVALID_PARAMETERS:
        case CSR_RC_INSUFFICIENT_RESOURCE:
            /* check for max retry limit & send again
             * MAX_RETRY_LIMIT is not maintained for each set of transactions..Its generic
             * If failure crosses this Limit, we have to take a call to FIX
             */
            if (retryCount > UNIFI_MAX_RETRY_LIMIT) {
                u8 moreData = FALSE;
                retryCount = 0;
                /* Because of continuos traffic in fh_cmd_q the tim set request is failing (exceeding retry limit)
                 * but if we didn't synchronize our timSet varible state with firmware then it can cause below issues
                 * cond 1. We want to SET tim in firmware if its fails & max retry limit reached
                 *   -> If host set's the timSet to 1, we wont try to send(as max retry reached) update tim but
                 *   firmware is not updated with queue(TIM) status so it wont set TIM in beacon finally host start piling
                 *    up data & wont try to set tim in firmware (This can cause worser performance)
                 * cond 2. We want to reset tim in firmware it fails & reaches max retry limit
                 *   -> If host sets the timSet to Zero, it wont try to set a TIM request unless we wont have any packets
                 *   to be queued, so beacon unnecessarily advertizes the TIM
                 */

                if(staRecord) {
                    if(!staRecord->wmmOrQosEnabled) {
                        moreData = (!list_empty(&staRecord->dataPdu[UNIFI_TRAFFIC_Q_CONTENTION]) ||
                                !list_empty(&staRecord->dataPdu[UNIFI_TRAFFIC_Q_VO]) ||
                                !list_empty(&staRecord->mgtFrames));
                    } else {
                        /* Peer is QSTA */
                        u8 allDeliveryEnabled = 0, dataAvailable = 0;
                        /* Check if all AC's are Delivery Enabled */
                        is_all_ac_deliver_enabled_and_moredata(staRecord, &allDeliveryEnabled, &dataAvailable);
                        /*check for more data in non-delivery enabled queues*/
                        moreData = (uf_is_more_data_for_non_delivery_ac(staRecord) || (allDeliveryEnabled && dataAvailable));

                    }
                    /* To avoid cond 1 & 2, check internal Queues status, if we have more Data then set RESET the timSet(0),
                     *  so we are trying to be in sync with firmware & next packets before queuing atleast try to
                     *  set TIM in firmware otherwise it SET timSet(1)
                     */
                    if (moreData) {
                        staRecord->timSet = CSR_WIFI_TIM_RESET;
                    } else {
                        staRecord->timSet = CSR_WIFI_TIM_SET;
                    }
                } else {
                    /* Its a broadcast frames */
                    moreData = (!list_empty(&interfacePriv->genericMulticastOrBroadCastMgtFrames) ||
                               !list_empty(&interfacePriv->genericMulticastOrBroadCastFrames));
                    if (moreData) {
                        update_tim(priv, 0, CSR_WIFI_TIM_SET, interfaceTag, 0xFFFFFFFF);
                    } else {
                        update_tim(priv, 0, CSR_WIFI_TIM_RESET, interfaceTag, 0xFFFFFFFF);
                    }
                }

                unifi_error(priv, "no of error's for TIM setting crossed the Limit: verify\n");
                return;
            }
            retryCount++;

            if (handle != CSR_WIFI_BROADCAST_OR_MULTICAST_HANDLE) {
                if (timSetStatus == staRecord->timSet) {
                    unifi_warning(priv, "tim request failed, retry for AID = %x\n", staRecord->aid);
                    update_tim(priv, staRecord->aid, timSetValue, interfaceTag, handle);
                } else {
                    unifi_trace(priv, UDBG1, "failure: request & confirm states are not matching in TIM cfm: Debug status = %x, staRecord->timSet = %x\n",
                                  timSetStatus, staRecord->timSet);
                }
            } else {
                unifi_warning(priv, "tim request failed, retry for broadcast frames\n");
                update_tim(priv, 0, timSetValue, interfaceTag, 0xFFFFFFFF);
            }
            break;
        default:
            unifi_warning(priv, "tim update request failed resultcode = %x\n", cfm->ResultCode);
    }

    unifi_trace(priv, UDBG2, "leaving %s\n", __FUNCTION__);
}

/*
 * ---------------------------------------------------------------------------
 *  update_tim
 *
 *
 *      This function updates tim status in firmware for AID[1 to UNIFI_MAX_CONNECTIONS] or
 *       AID[0] for broadcast/multicast packets.
 *
 *      NOTE: The LSB (least significant BYTE) of senderId while sending this MLME premitive
 *       has been modified(utilized) as below
 *
 *       SenderID in signal's SignalPrimitiveHeader is 2 byte the lowe byte bitmap is below
 *
 *       station handle(6 bits)      timSet Status (2 bits)
 *       ---------------------       ----------------------
 *       0  0  0  0  0  0        |       0  0
 *
 * timSet Status can be one of below:
 *
 * CSR_WIFI_TIM_RESET
 * CSR_WIFI_TIM_RESETTING
 * CSR_WIFI_TIM_SET
 * CSR_WIFI_TIM_SETTING
 *
 *  Arguments:
 *      priv            Pointer to device private context struct
 *      aid             can be 1 t0 UNIFI_MAX_CONNECTIONS & 0 means multicast/broadcast
 *      setTim          value SET(1) / RESET(0)
 *      interfaceTag    the interfaceID on which activity going on
 *      handle          from  (0 <= handle < UNIFI_MAX_CONNECTIONS)
 *
 * ---------------------------------------------------------------------------
 */
void update_tim(unifi_priv_t * priv, u16 aid, u8 setTim, u16 interfaceTag, u32 handle)
{
    CSR_SIGNAL signal;
    s32 r;
    CSR_MLME_SET_TIM_REQUEST *req = &signal.u.MlmeSetTimRequest;
    bulk_data_param_t *bulkdata = NULL;
    netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
    u8 senderIdLsb = 0;
    CsrWifiRouterCtrlStaInfo_t *staRecord = NULL;
    u32 oldTimSetStatus = 0, timSetStatus = 0;

    unifi_trace(priv, UDBG5, "entering the update_tim routine\n");


    if (handle == 0xFFFFFFFF) {
        handle &= CSR_WIFI_BROADCAST_OR_MULTICAST_HANDLE;
        if (setTim == interfacePriv->bcTimSet)
        {
            unifi_trace(priv, UDBG3, "update_tim, Drop:Hdl=%x, timval=%d, globalTim=%d\n", handle, setTim, interfacePriv->bcTimSet);
            return;
        }
    } else if ((handle != 0xFFFFFFFF) && (handle >= UNIFI_MAX_CONNECTIONS)) {
        unifi_warning(priv, "bad station Handle = %x\n", handle);
        return;
    }

    if (setTim) {
        timSetStatus =  CSR_WIFI_TIM_SETTING;
    } else {
        timSetStatus =  CSR_WIFI_TIM_RESETTING;
    }

    if (handle != CSR_WIFI_BROADCAST_OR_MULTICAST_HANDLE) {
        if ((staRecord = ((CsrWifiRouterCtrlStaInfo_t *) (interfacePriv->staInfo[handle]))) == NULL) {
            unifi_warning(priv, "station record is NULL in  update_tim: handle = %x :debug\n", handle);
            return;
        }
        /* In case of signal sending failed, revert back to old state */
        oldTimSetStatus = staRecord->timSet;
        staRecord->timSet = timSetStatus;
    }

    /* pack senderID LSB */
    senderIdLsb = CSR_WIFI_PACK_SENDER_ID_LSB_FOR_TIM_REQ(handle,  timSetStatus);

    /* initialize signal to zero */
    memset(&signal, 0, sizeof(CSR_SIGNAL));

    /* Frame the MLME-SET-TIM request */
    signal.SignalPrimitiveHeader.SignalId = CSR_MLME_SET_TIM_REQUEST_ID;
    signal.SignalPrimitiveHeader.ReceiverProcessId = 0;
    CSR_COPY_UINT16_TO_LITTLE_ENDIAN(((priv->netdev_client->sender_id & 0xff00) | senderIdLsb),
                   (u8*)&signal.SignalPrimitiveHeader.SenderProcessId);

    /* set The virtual interfaceIdentifier, aid, tim value */
    req->VirtualInterfaceIdentifier = uf_get_vif_identifier(interfacePriv->interfaceMode,interfaceTag);
    req->AssociationId = aid;
    req->TimValue = setTim;


    unifi_trace(priv, UDBG2, "update_tim:AID %x,senderIdLsb = 0x%x, handle = 0x%x, timSetStatus = %x, sender proceesID = %x \n",
                aid,senderIdLsb, handle, timSetStatus, signal.SignalPrimitiveHeader.SenderProcessId);

    /* Send the signal to UniFi */
    r = ul_send_signal_unpacked(priv, &signal, bulkdata);
    if (r) {
        /* No need to free bulk data, as TIM request doesn't carries any data */
        unifi_error(priv, "Error queueing CSR_MLME_SET_TIM_REQUEST signal\n");
        if (staRecord) {
            staRecord->timSet = oldTimSetStatus ;
        }
        else
        {
            /* MLME_SET_TIM.req sending failed here for AID0, so revert back our bcTimSet status */
            interfacePriv->bcTimSet = !setTim;
        }
    }
    else {
        /* Update tim request pending flag and ensure no more TIM set requests are send
           for the same station until TIM confirm is received */
        if (staRecord) {
            staRecord->timRequestPendingFlag = TRUE;
        }
        else
        {
            /* Update tim request (for AID 0) pending flag and ensure no more DTIM set requests are send
             * for the same station until TIM confirm is received
             */
            interfacePriv->bcTimSetReqPendingFlag = TRUE;
        }
    }
    unifi_trace(priv, UDBG5, "leaving the update_tim routine\n");
}

static
void process_peer_active_transition(unifi_priv_t * priv,
                                    CsrWifiRouterCtrlStaInfo_t *staRecord,
                                    u16 interfaceTag)
{
    int r,i;
    u8 spaceAvail[4] = {TRUE,TRUE,TRUE,TRUE};
    tx_buffered_packets_t * buffered_pkt = NULL;
    unsigned long lock_flags;
    netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];

    unifi_trace(priv, UDBG5, "entering process_peer_active_transition\n");

    if(IS_DTIM_ACTIVE(interfacePriv->dtimActive,interfacePriv->multicastPduHostTag)) {
        /* giving more priority to multicast packets so delaying unicast packets*/
        unifi_trace(priv,UDBG2, "Multicast transmission is going on so resume unicast transmission after DTIM over\n");

        /* As station is active now, even though AP is not able to send frames to it
         * because of DTIM, it needs to reset the TIM here
         */
        if (!staRecord->timRequestPendingFlag){
            if((staRecord->timSet == CSR_WIFI_TIM_SET) || (staRecord->timSet == CSR_WIFI_TIM_SETTING)){
                update_tim(priv, staRecord->aid, 0, interfaceTag, staRecord->assignedHandle);
            }
        }
        else
        {
            /* Cache the TimSet value so that it will processed immidiatly after
             * completing the current setTim Request
             */
            staRecord->updateTimReqQueued = 0;
            unifi_trace(priv, UDBG6, "update_tim : One more UpdateTim Request (Tim value:%d) Queued for AID %x\n", staRecord->updateTimReqQueued,
                        staRecord->aid);
        }
        return;
    }
    while((buffered_pkt=dequeue_tx_data_pdu(priv, &staRecord->mgtFrames))) {
        buffered_pkt->transmissionControl &=
                     ~(TRANSMISSION_CONTROL_TRIGGER_MASK|TRANSMISSION_CONTROL_EOSP_MASK);
        if((r=frame_and_send_queued_pdu(priv,buffered_pkt,staRecord,0,FALSE)) == -ENOSPC) {
            unifi_trace(priv, UDBG2, "p_p_a_t:(ENOSPC) Mgt Frame queueing \n");
            /* Enqueue at the head of the queue */
            spin_lock_irqsave(&priv->tx_q_lock,lock_flags);
            list_add(&buffered_pkt->q, &staRecord->mgtFrames);
            spin_unlock_irqrestore(&priv->tx_q_lock,lock_flags);
            priv->pausedStaHandle[3]=(u8)(staRecord->assignedHandle);
            spaceAvail[3] = FALSE;
            break;
        } else {
            if(r){
                unifi_trace (priv, UDBG1, " HIP validation failure : PDU sending failed \n");
                /* the PDU failed where we can't do any thing so free the storage */
                unifi_net_data_free(priv, &buffered_pkt->bulkdata);
            }
            kfree(buffered_pkt);
        }
    }
    if (!staRecord->timRequestPendingFlag) {
        if (staRecord->txSuspend) {
            if(staRecord->timSet == CSR_WIFI_TIM_SET) {
                update_tim(priv,staRecord->aid,0,interfaceTag, staRecord->assignedHandle);
            }
            return;
        }
    }
    else
    {
        /* Cache the TimSet value so that it will processed immidiatly after
         * completing the current setTim Request
         */
        staRecord->updateTimReqQueued = 0;
        unifi_trace(priv, UDBG6, "update_tim : One more UpdateTim Request (Tim value:%d) Queued for AID %x\n", staRecord->updateTimReqQueued,
                    staRecord->aid);
    }
    for(i=3;i>=0;i--) {
        if(!spaceAvail[i])
            continue;
        unifi_trace(priv, UDBG6, "p_p_a_t:data pkt sending for AC %d \n",i);
        while((buffered_pkt=dequeue_tx_data_pdu(priv, &staRecord->dataPdu[i]))) {
           buffered_pkt->transmissionControl &=
                      ~(TRANSMISSION_CONTROL_TRIGGER_MASK|TRANSMISSION_CONTROL_EOSP_MASK);
           if((r=frame_and_send_queued_pdu(priv,buffered_pkt,staRecord,0,FALSE)) == -ENOSPC) {
               /* Clear the trigger bit transmission control*/
               /* Enqueue at the head of the queue */
               spin_lock_irqsave(&priv->tx_q_lock,lock_flags);
               list_add(&buffered_pkt->q, &staRecord->dataPdu[i]);
               spin_unlock_irqrestore(&priv->tx_q_lock,lock_flags);
               priv->pausedStaHandle[i]=(u8)(staRecord->assignedHandle);
               break;
           } else {
              if(r){
                  unifi_trace (priv, UDBG1, " HIP validation failure : PDU sending failed \n");
                  /* the PDU failed where we can't do any thing so free the storage */
                  unifi_net_data_free(priv, &buffered_pkt->bulkdata);
               }
              kfree(buffered_pkt);
           }
        }
    }
    if (!staRecord->timRequestPendingFlag){
        if((staRecord->timSet  == CSR_WIFI_TIM_SET) || (staRecord->timSet  == CSR_WIFI_TIM_SETTING)) {
            unifi_trace(priv, UDBG3, "p_p_a_t:resetting tim .....\n");
            update_tim(priv,staRecord->aid,0,interfaceTag, staRecord->assignedHandle);
        }
    }
    else
    {
        /* Cache the TimSet value so that it will processed immidiatly after
         * completing the current setTim Request
         */
        staRecord->updateTimReqQueued = 0;
        unifi_trace(priv, UDBG6, "update_tim : One more UpdateTim Request (Tim value:%d) Queued for AID %x\n", staRecord->updateTimReqQueued,
                    staRecord->aid);
    }
    unifi_trace(priv, UDBG5, "leaving process_peer_active_transition\n");
}


void uf_process_ma_pkt_cfm_for_ap(unifi_priv_t *priv,u16 interfaceTag, const CSR_MA_PACKET_CONFIRM *pkt_cfm)
{
    netInterface_priv_t *interfacePriv;
    u8 i;
    CsrWifiRouterCtrlStaInfo_t *staRecord = NULL;
    interfacePriv = priv->interfacePriv[interfaceTag];


    if(pkt_cfm->HostTag == interfacePriv->multicastPduHostTag) {
         unifi_trace(priv,UDBG2,"CFM for marked Multicast Tag = %x\n",interfacePriv->multicastPduHostTag);
         interfacePriv->multicastPduHostTag = 0xffffffff;
         resume_suspended_uapsd(priv,interfaceTag);
         resume_unicast_buffered_frames(priv,interfaceTag);
         if(list_empty(&interfacePriv->genericMulticastOrBroadCastMgtFrames) &&
              list_empty(&interfacePriv->genericMulticastOrBroadCastFrames)) {
            unifi_trace(priv,UDBG1,"Resetting multicastTIM");
            if (!interfacePriv->bcTimSetReqPendingFlag)
            {
                update_tim(priv,0,CSR_WIFI_TIM_RESET,interfaceTag, 0xFFFFFFFF);
            }
            else
            {
                /* Cache the DTimSet value so that it will processed immidiatly after
                 * completing the current setDTim Request
                 */
                 interfacePriv->bcTimSetReqQueued = CSR_WIFI_TIM_RESET;
                 unifi_trace(priv, UDBG2, "uf_process_ma_pkt_cfm_for_ap : One more UpdateDTim Request(%d) Queued \n",
                             interfacePriv->bcTimSetReqQueued);
            }

        }
        return;
    }

    /* Check if it is a Confirm for null data frame used
     * for probing station activity
     */
    for(i =0; i < UNIFI_MAX_CONNECTIONS; i++) {
        staRecord = (CsrWifiRouterCtrlStaInfo_t *) (interfacePriv->staInfo[i]);
        if (staRecord && (staRecord->nullDataHostTag == pkt_cfm->HostTag)) {

            unifi_trace(priv, UDBG1, "CFM for Inactive probe Null frame (tag = %x, status = %d)\n",
                                    pkt_cfm->HostTag,
                                    pkt_cfm->TransmissionStatus
                                    );
            staRecord->nullDataHostTag = INVALID_HOST_TAG;

            if(pkt_cfm->TransmissionStatus == CSR_TX_RETRY_LIMIT){
                u32 now;
                u32 inactive_time;

                unifi_trace(priv, UDBG1, "Nulldata to probe STA ALIVE Failed with retry limit\n");
                /* Recheck if there is some activity after null data is sent.
                *
                * If still there is no activity then send a disconnected indication
                * to SME to delete the station record.
                */
                if (staRecord->activity_flag){
                    return;
                }
                now = CsrTimeGet(NULL);

                if (staRecord->lastActivity > now)
                {
                    /* simple timer wrap (for 1 wrap) */
                    inactive_time = CsrTimeAdd((u32)CsrTimeSub(CSR_SCHED_TIME_MAX, staRecord->lastActivity),
                                               now);
                }
                else
                {
                    inactive_time = (u32)CsrTimeSub(now, staRecord->lastActivity);
                }

                if (inactive_time >= STA_INACTIVE_TIMEOUT_VAL)
                {
                    struct list_head send_cfm_list;
                    u8 j;

                    /* The SME/NME may be waiting for confirmation for requested frames to this station.
                     * Though this is --VERY UNLIKELY-- in case of station in active mode. But still as a
                     * a defensive check, it loops through buffered frames for this station and if confirmation
                     * is requested, send auto confirmation with failure status. Also flush the frames so
                     * that these are not processed again in PEER_DEL_REQ handler.
                     */
                    INIT_LIST_HEAD(&send_cfm_list);

                    uf_prepare_send_cfm_list_for_queued_pkts(priv,
                                                             &send_cfm_list,
                                                             &(staRecord->mgtFrames));

                    uf_flush_list(priv, &(staRecord->mgtFrames));

                    for(j = 0; j < MAX_ACCESS_CATOGORY; j++){
                        uf_prepare_send_cfm_list_for_queued_pkts(priv,
                                                                 &send_cfm_list,
                                                                 &(staRecord->dataPdu[j]));

                        uf_flush_list(priv,&(staRecord->dataPdu[j]));
                    }

                    send_auto_ma_packet_confirm(priv, staRecord->interfacePriv, &send_cfm_list);


                    unifi_warning(priv, "uf_process_ma_pkt_cfm_for_ap: Router Disconnected IND Peer (%x-%x-%x-%x-%x-%x)\n",
                                             staRecord->peerMacAddress.a[0],
                                             staRecord->peerMacAddress.a[1],
                                             staRecord->peerMacAddress.a[2],
                                             staRecord->peerMacAddress.a[3],
                                             staRecord->peerMacAddress.a[4],
                                             staRecord->peerMacAddress.a[5]);

                    CsrWifiRouterCtrlConnectedIndSend(priv->CSR_WIFI_SME_IFACEQUEUE,
                                                      0,
                                                      staRecord->interfacePriv->InterfaceTag,
                                                      staRecord->peerMacAddress,
                                                      CSR_WIFI_ROUTER_CTRL_PEER_DISCONNECTED);
                }

            }
            else if (pkt_cfm->TransmissionStatus == CSR_TX_SUCCESSFUL)
            {
                 staRecord->activity_flag = TRUE;
            }
        }
    }
}

#endif
u16 uf_get_vif_identifier (CsrWifiRouterCtrlMode mode, u16 tag)
{
    switch(mode)
    {
        case CSR_WIFI_ROUTER_CTRL_MODE_STA:
        case CSR_WIFI_ROUTER_CTRL_MODE_P2PCLI:
            return (0x02<<8|tag);

        case CSR_WIFI_ROUTER_CTRL_MODE_AP:
        case CSR_WIFI_ROUTER_CTRL_MODE_P2PGO:
            return (0x03<<8|tag);

        case CSR_WIFI_ROUTER_CTRL_MODE_IBSS:
            return (0x01<<8|tag);

        case CSR_WIFI_ROUTER_CTRL_MODE_MONITOR:
            return (0x04<<8|tag);
        case CSR_WIFI_ROUTER_CTRL_MODE_AMP:
            return (0x05<<8|tag);
        default:
            return tag;
    }
}

#ifdef CSR_SUPPORT_SME

/*
 * ---------------------------------------------------------------------------
 *  update_macheader
 *
 *
 *      These functions updates mac header for intra BSS packet
 *      routing.
 *      NOTE: This function always has to be called in rx context which
 *      is in bh thread context since GFP_KERNEL is used. In soft IRQ/ Interrupt
 *      context shouldn't be used
 *
 *  Arguments:
 *      priv            Pointer to device private context struct
 *      skb             Socket buffer containing data packet to transmit
 *      newSkb          Socket buffer containing data packet + Mac header if no sufficient headroom in skb
 *      priority        to append QOS control header in Mac header
 *      bulkdata        if newSkb allocated then bulkdata updated to send to unifi
 *      interfaceTag    the interfaceID on which activity going on
 *      macHeaderLengthInBytes no. of bytes of mac header in received frame
 *      qosDestination  used to append Qos control field
 *
 *  Returns:
 *      Zero on success or -1 on error.
 * ---------------------------------------------------------------------------
 */

static int update_macheader(unifi_priv_t *priv, struct sk_buff *skb,
                            struct sk_buff *newSkb, CSR_PRIORITY *priority,
                            bulk_data_param_t *bulkdata, u16 interfaceTag,
                            u8 macHeaderLengthInBytes,
                            u8 qosDestination)
{

    u16 *fc = NULL;
    u8 direction = 0, toDs, fromDs;
    u8 *bufPtr = NULL;
    u8 sa[ETH_ALEN], da[ETH_ALEN];
    netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
    int headroom;
    u8 macHeaderBuf[IEEE802_11_DATA_FRAME_MAC_HEADER_SIZE] = {0};

    unifi_trace(priv, UDBG5, "entering the update_macheader function\n");

    /* temporary buffer for the Mac header storage */
    memcpy(macHeaderBuf, skb->data, macHeaderLengthInBytes);

    /* remove the Macheader from the skb */
    skb_pull(skb, macHeaderLengthInBytes);

    /* get the skb headroom for skb_push check */
    headroom = skb_headroom(skb);

    /*  pointer to frame control field */
    fc = (u16*) macHeaderBuf;

    toDs = (*fc & cpu_to_le16(IEEE802_11_FC_TO_DS_MASK))?1 : 0;
    fromDs = (*fc & cpu_to_le16(IEEE802_11_FC_FROM_DS_MASK))? 1: 0;
    unifi_trace(priv, UDBG5, "In update_macheader function, fromDs = %x, toDs = %x\n", fromDs, toDs);
    direction = ((fromDs | (toDs << 1)) & 0x3);

    /* Address1 or 3 from the macheader */
    memcpy(da, macHeaderBuf+4+toDs*12, ETH_ALEN);
    /* Address2, 3 or 4 from the mac header */
    memcpy(sa, macHeaderBuf+10+fromDs*(6+toDs*8), ETH_ALEN);

    unifi_trace(priv, UDBG3, "update_macheader:direction = %x\n", direction);
    /* update the toDs, fromDs & address fields in Mac header */
    switch(direction)
    {
        case 2:
            /* toDs = 1 & fromDs = 0 , toAp when frames received from peer
             * while sending this packet to Destination the Mac header changed
             * as fromDs = 1 & toDs = 0, fromAp
             */
            *fc &= cpu_to_le16(~IEEE802_11_FC_TO_DS_MASK);
            *fc |= cpu_to_le16(IEEE802_11_FC_FROM_DS_MASK);
            /* Address1: MAC address of the actual destination (4 = 2+2) */
            memcpy(macHeaderBuf + 4, da, ETH_ALEN);
            /* Address2: The MAC address of the AP (10 = 2+2+6) */
            memcpy(macHeaderBuf + 10, &interfacePriv->bssid, ETH_ALEN);
            /* Address3: MAC address of the actual source from mac header (16 = 2+2+6+6) */
            memcpy(macHeaderBuf + 16, sa, ETH_ALEN);
            break;
        case 3:
            unifi_trace(priv, UDBG3, "when both the toDs & fromDS set, NOT SUPPORTED\n");
            break;
        default:
            unifi_trace(priv, UDBG3, "problem in decoding packet in update_macheader \n");
            return -1;
    }

    /* frameType is Data always, Validation is done before calling this function */

    /* check for the souce station type */
    switch(le16_to_cpu(*fc) & IEEE80211_FC_SUBTYPE_MASK)
    {
        case IEEE802_11_FC_TYPE_QOS_DATA & IEEE80211_FC_SUBTYPE_MASK:
            /* No need to modify the qos control field */
            if (!qosDestination) {

                /* If source Sta is QOS enabled & if this bit set, then HTC is supported by
                 * peer station & htc field present in macHeader
                 */
                if (*fc & cpu_to_le16(IEEE80211_FC_ORDER_MASK)) {
                    /* HT control field present in Mac header
                     * 6 = sizeof(qosControl) + sizeof(htc)
                     */
                    macHeaderLengthInBytes -= 6;
                } else {
                    macHeaderLengthInBytes -= 2;
                }
                /* Destination STA is non qos so change subtype to DATA */
                *fc &= cpu_to_le16(~IEEE80211_FC_SUBTYPE_MASK);
                *fc |= cpu_to_le16(IEEE802_11_FC_TYPE_DATA);
                /* remove the qos control field & HTC(if present). new macHeaderLengthInBytes is less than old
                 * macHeaderLengthInBytes so no need to verify skb headroom
                 */
                if (headroom < macHeaderLengthInBytes) {
                    unifi_trace(priv, UDBG1, " sufficient headroom not there to push updated mac header \n");
                    return -1;
                }
                bufPtr = (u8 *) skb_push(skb, macHeaderLengthInBytes);

                /*  update bulk data os_data_ptr */
                bulkdata->d[0].os_data_ptr = skb->data;
                bulkdata->d[0].os_net_buf_ptr = (unsigned char*)skb;
                bulkdata->d[0].data_length = skb->len;

            } else {
                /* pointing to QOS control field */
                u8 qc;
                if (*fc & cpu_to_le16(IEEE80211_FC_ORDER_MASK)) {
                    qc = *((u8*)(macHeaderBuf + (macHeaderLengthInBytes - 4 - 2)));
                } else {
                    qc = *((u8*)(macHeaderBuf + (macHeaderLengthInBytes - 2)));
                }

                if ((qc & IEEE802_11_QC_TID_MASK) > 7) {
                    *priority = 7;
                } else {
                    *priority = qc & IEEE802_11_QC_TID_MASK;
                }

                unifi_trace(priv, UDBG1, "Incoming packet priority from QSTA is %x\n", *priority);

                if (headroom < macHeaderLengthInBytes) {
                    unifi_trace(priv, UDBG3, " sufficient headroom not there to push updated mac header \n");
                    return -1;
                }
                bufPtr = (u8 *) skb_push(skb, macHeaderLengthInBytes);
            }
            break;
        default:
            {
                bulk_data_param_t data_ptrs;
                CsrResult csrResult;
                unifi_trace(priv, UDBG5, "normal Data packet, NO QOS \n");

                if (qosDestination) {
                    u8 qc = 0;
                    unifi_trace(priv, UDBG3, "destination is QOS station \n");

                    /* Set Ma-Packet.req UP to UP0 */
                    *priority = CSR_QOS_UP0;

                    /* prepare the qos control field */
                    qc |= CSR_QOS_UP0;
                    /* no Amsdu is in ap buffer so eosp is left 0 */
                    if (da[0] & 0x1) {
                        /* multicast/broadcast frames, no acknowledgement needed */
                        qc |= 1 << 5;
                    }

                    /* update new Mac header Length with 2 = sizeof(qos control) */
                    macHeaderLengthInBytes += 2;

                    /* received DATA frame but destiantion is QOS station so update subtype to QOS*/
                    *fc &= cpu_to_le16(~IEEE80211_FC_SUBTYPE_MASK);
                    *fc |= cpu_to_le16(IEEE802_11_FC_TYPE_QOS_DATA);

                    /* appendQosControlOffset = macHeaderLengthInBytes - 2, since source sta is not QOS */
                    macHeaderBuf[macHeaderLengthInBytes - 2] = qc;
                    /* txopLimit is 0 */
                    macHeaderBuf[macHeaderLengthInBytes - 1] = 0;
                    if (headroom < macHeaderLengthInBytes) {
                        csrResult = unifi_net_data_malloc(priv, &data_ptrs.d[0], skb->len + macHeaderLengthInBytes);

                        if (csrResult != CSR_RESULT_SUCCESS) {
                            unifi_error(priv, " failed to allocate request_data. in update_macheader func\n");
                            return -1;
                        }
                        newSkb = (struct sk_buff *)(data_ptrs.d[0].os_net_buf_ptr);
                        newSkb->len = skb->len + macHeaderLengthInBytes;

                        memcpy((void*)data_ptrs.d[0].os_data_ptr + macHeaderLengthInBytes,
                                skb->data, skb->len);

                        bulkdata->d[0].os_data_ptr = newSkb->data;
                        bulkdata->d[0].os_net_buf_ptr = (unsigned char*)newSkb;
                        bulkdata->d[0].data_length = newSkb->len;

                        bufPtr = (u8*)data_ptrs.d[0].os_data_ptr;

                        /* The old skb will not be used again */
                        kfree_skb(skb);
                    } else {
                        /* skb headroom is sufficient to append Macheader */
                        bufPtr = (u8*)skb_push(skb, macHeaderLengthInBytes);
                        bulkdata->d[0].os_data_ptr = skb->data;
                        bulkdata->d[0].os_net_buf_ptr = (unsigned char*)skb;
                        bulkdata->d[0].data_length = skb->len;
                    }
                } else {
                    unifi_trace(priv, UDBG3, "destination is not a QSTA\n");
                    if (headroom < macHeaderLengthInBytes) {
                        csrResult = unifi_net_data_malloc(priv, &data_ptrs.d[0], skb->len + macHeaderLengthInBytes);

                        if (csrResult != CSR_RESULT_SUCCESS) {
                            unifi_error(priv, " failed to allocate request_data. in update_macheader func\n");
                            return -1;
                        }
                        newSkb = (struct sk_buff *)(data_ptrs.d[0].os_net_buf_ptr);
                        newSkb->len = skb->len + macHeaderLengthInBytes;

                        memcpy((void*)data_ptrs.d[0].os_data_ptr + macHeaderLengthInBytes,
                                skb->data, skb->len);

                        bulkdata->d[0].os_data_ptr = newSkb->data;
                        bulkdata->d[0].os_net_buf_ptr = (unsigned char*)newSkb;
                        bulkdata->d[0].data_length = newSkb->len;

                        bufPtr = (u8*)data_ptrs.d[0].os_data_ptr;

                        /* The old skb will not be used again */
                        kfree_skb(skb);
                    } else {
                        /* skb headroom is sufficient to append Macheader */
                        bufPtr = (u8*)skb_push(skb, macHeaderLengthInBytes);
                        bulkdata->d[0].os_data_ptr = skb->data;
                        bulkdata->d[0].os_net_buf_ptr = (unsigned char*)skb;
                        bulkdata->d[0].data_length = skb->len;
                    }
                }
            }
    }

    /* prepare the complete skb, by pushing the MAC header to the begining of the skb->data */
    unifi_trace(priv, UDBG5, "updated Mac Header: %d \n",macHeaderLengthInBytes);
    memcpy(bufPtr, macHeaderBuf, macHeaderLengthInBytes);

    unifi_trace(priv, UDBG5, "leaving the update_macheader function\n");
    return 0;
}
/*
 * ---------------------------------------------------------------------------
 *  uf_ap_process_data_pdu
 *
 *
 *      Takes care of intra BSS admission control & routing packets within BSS
 *
 *  Arguments:
 *      priv            Pointer to device private context struct
 *      skb             Socket buffer containing data packet to transmit
 *      ehdr            ethernet header to fetch priority of packet
 *      srcStaInfo      source stations record for connection verification
 *      packed_signal
 *      signal_len
 *      signal          MA-PACKET.indication signal
 *      bulkdata        if newSkb allocated then bulkdata updated to send to unifi
 *      macHeaderLengthInBytes no. of bytes of mac header in received frame
 *
 *  Returns:
 *      Zero on success(ap processing complete) or -1 if packet also have to be sent to NETDEV.
 * ---------------------------------------------------------------------------
 */
int
uf_ap_process_data_pdu(unifi_priv_t *priv, struct sk_buff *skb,
                       struct ethhdr *ehdr, CsrWifiRouterCtrlStaInfo_t * srcStaInfo,
                       const CSR_SIGNAL *signal,
                       bulk_data_param_t *bulkdata,
                       u8 macHeaderLengthInBytes)
{
    const CSR_MA_PACKET_INDICATION *ind = &(signal->u.MaPacketIndication);
    u16 interfaceTag = (ind->VirtualInterfaceIdentifier & 0x00ff);
    struct sk_buff *newSkb = NULL;
    /* pointer to skb or private skb created using skb_copy() */
    struct sk_buff *skbPtr = skb;
    u8 sendToNetdev = FALSE;
    u8 qosDestination = FALSE;
    CSR_PRIORITY priority = CSR_CONTENTION;
    CsrWifiRouterCtrlStaInfo_t *dstStaInfo = NULL;
    netInterface_priv_t *interfacePriv;

    unifi_trace(priv, UDBG5, "entering  uf_ap_process_data_pdu %d\n",macHeaderLengthInBytes);
    /* InterfaceTag validation from MA_PACKET.indication */
    if (interfaceTag >= CSR_WIFI_NUM_INTERFACES) {
        unifi_trace(priv, UDBG1, "Interface Tag is Invalid in uf_ap_process_data_pdu\n");
        unifi_net_data_free(priv, &bulkdata->d[0]);
        return 0;
    }
    interfacePriv = priv->interfacePriv[interfaceTag];

    if((interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_P2PGO) &&
       (interfacePriv->intraBssEnabled == FALSE)) {
        unifi_trace(priv, UDBG2, "uf_ap_process_data_pdu:P2P GO intrabssEnabled?= %d\n", interfacePriv->intraBssEnabled);

        /*In P2P GO case, if intraBSS distribution Disabled then don't do IntraBSS routing */
        /* If destination in our BSS then drop otherwise give packet to netdev */
        dstStaInfo = CsrWifiRouterCtrlGetStationRecordFromPeerMacAddress(priv, ehdr->h_dest, interfaceTag);
        if (dstStaInfo) {
            unifi_net_data_free(priv, &bulkdata->d[0]);
            return 0;
        }
        /* May be associated P2PCLI trying to send the packets on backbone (Netdev) */
        return -1;
    }

    if(!memcmp(ehdr->h_dest, interfacePriv->bssid.a, ETH_ALEN)) {
        /* This packet will be given to the TCP/IP stack since this packet is for us(AP)
         * No routing needed */
        unifi_trace(priv, UDBG4, "destination address is csr_ap\n");
        return -1;
    }

    /* fetch the destination record from staion record database */
    dstStaInfo = CsrWifiRouterCtrlGetStationRecordFromPeerMacAddress(priv, ehdr->h_dest, interfaceTag);

    /* AP mode processing, & if packet is unicast */
    if(!dstStaInfo) {
        if (!(ehdr->h_dest[0] & 0x1)) {
            /* destination not in station record & its a unicast packet, so pass the packet to network stack */
            unifi_trace(priv, UDBG3, "unicast frame & destination record not exist, send to netdev proto = %x\n", htons(skb->protocol));
            return -1;
        } else {
            /* packet is multicast/broadcast */
            /* copy the skb to skbPtr, send skb to netdev & skbPtr to multicast/broad cast list */
            unifi_trace(priv, UDBG5, "skb_copy, in  uf_ap_process_data_pdu, protocol = %x\n", htons(skb->protocol));
            skbPtr = skb_copy(skb, GFP_KERNEL);
            if(skbPtr == NULL) {
                /* We don't have memory to don't send the frame in BSS*/
                unifi_notice(priv, "broacast/multicast frame can't be sent in BSS No memeory: proto = %x\n", htons(skb->protocol));
                return -1;
            }
            sendToNetdev = TRUE;
        }
    } else {

        /* validate the Peer & Destination Station record */
        if (uf_process_station_records_for_sending_data(priv, interfaceTag, srcStaInfo, dstStaInfo)) {
            unifi_notice(priv, "uf_ap_process_data_pdu: station record validation failed \n");
            interfacePriv->stats.rx_errors++;
            unifi_net_data_free(priv, &bulkdata->d[0]);
            return 0;
        }
    }

    /* BroadCast packet received and it's been sent as non QOS packets.
     * Since WMM spec not mandates broadcast/multicast to be sent as QOS data only,
     * if all Peers are QSTA
     */
    if(sendToNetdev) {
       /* BroadCast packet and it's been sent as non QOS packets */
        qosDestination = FALSE;
    } else if(dstStaInfo && (dstStaInfo->wmmOrQosEnabled == TRUE)) {
          qosDestination = TRUE;
    }

    unifi_trace(priv, UDBG3, "uf_ap_process_data_pdu QoS destination  = %s\n", (qosDestination)? "TRUE": "FALSE");

    /* packet is allowed to send to unifi, update the Mac header */
    if (update_macheader(priv, skbPtr, newSkb, &priority, bulkdata, interfaceTag, macHeaderLengthInBytes, qosDestination)) {
        interfacePriv->stats.rx_errors++;
        unifi_notice(priv, "(Packet Drop) failed to update the Mac header in uf_ap_process_data_pdu\n");
        if (sendToNetdev) {
            /*  Free's the skb_copy(skbPtr) data since packet processing failed */
            bulkdata->d[0].os_data_ptr = skbPtr->data;
            bulkdata->d[0].os_net_buf_ptr = (unsigned char*)skbPtr;
            bulkdata->d[0].data_length = skbPtr->len;
            unifi_net_data_free(priv, &bulkdata->d[0]);
        }
        return -1;
    }

    unifi_trace(priv, UDBG3, "Mac Header updated...calling uf_process_ma_packet_req \n");

    /* Packet is ready to send to unifi ,transmissionControl = 0x0004, confirmation is not needed for data packets */
    if (uf_process_ma_packet_req(priv,  ehdr->h_dest, 0xffffffff, interfaceTag, CSR_NO_CONFIRM_REQUIRED, (CSR_RATE)0,priority, priv->netdev_client->sender_id, bulkdata)) {
        if (sendToNetdev) {
            unifi_trace(priv, UDBG1, "In uf_ap_process_data_pdu, (Packet Drop) uf_process_ma_packet_req failed. freeing skb_copy data (original data sent to Netdev)\n");
            /*  Free's the skb_copy(skbPtr) data since packet processing failed */
            bulkdata->d[0].os_data_ptr = skbPtr->data;
            bulkdata->d[0].os_net_buf_ptr = (unsigned char*)skbPtr;
            bulkdata->d[0].data_length = skbPtr->len;
            unifi_net_data_free(priv, &bulkdata->d[0]);
        } else {
            /* This free's the skb data */
            unifi_trace(priv, UDBG1, "In uf_ap_process_data_pdu, (Packet Drop). Unicast data so freeing original skb \n");
            unifi_net_data_free(priv, &bulkdata->d[0]);
        }
    }
    unifi_trace(priv, UDBG5, "leaving  uf_ap_process_data_pdu\n");

    if (sendToNetdev) {
        /* The packet is multicast/broadcast, so after AP processing packet has to
         * be sent to netdev, if peer port state is open
        */
        unifi_trace(priv, UDBG4, "Packet will be routed to NetDev\n");
        return -1;
    }
    /* Ap handled the packet & its a unicast packet, no need to send to netdev */
    return 0;
}

#endif

CsrResult uf_process_ma_packet_req(unifi_priv_t *priv,
                                   u8 *peerMacAddress,
                                   CSR_CLIENT_TAG hostTag,
                                   u16 interfaceTag,
                                   CSR_TRANSMISSION_CONTROL transmissionControl,
                                   CSR_RATE TransmitRate,
                                   CSR_PRIORITY priority,
                                   CSR_PROCESS_ID leSenderProcessId,
                                   bulk_data_param_t *bulkdata)
{
    CsrResult status = CSR_RESULT_SUCCESS;
    CSR_SIGNAL signal;
    int result;
#ifdef CSR_SUPPORT_SME
   CsrWifiRouterCtrlStaInfo_t *staRecord = NULL;
    const u8 *macHdrLocation =  bulkdata->d[0].os_data_ptr;
    CsrWifiPacketType pktType;
    int frameType = 0;
    u8 queuePacketDozing = FALSE;
    u32 priority_q;
    u16 frmCtrl;
    struct list_head * list = NULL; /* List to which buffered PDUs are to be enqueued*/
    u8 setBcTim=FALSE;
    netInterface_priv_t *interfacePriv;
    u8 requeueOnSamePos = FALSE;
    u32 handle = 0xFFFFFFFF;