/******************************************************************************
 *
 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 *
 ******************************************************************************/
#define _RTW_XMIT_C_

#include <osdep_service.h>
#include <drv_types.h>
#include <wifi.h>
#include <osdep_intf.h>
#include <ip.h>
#include <usb_ops.h>
#include <usb_osintf.h>

static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 };
static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 };

static void _init_txservq(struct tx_servq *ptxservq)
{
_func_enter_;
        _rtw_init_listhead(&ptxservq->tx_pending);
        _rtw_init_queue(&ptxservq->sta_pending);
        ptxservq->qcnt = 0;
_func_exit_;
}

void    _rtw_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv)
{
_func_enter_;
        _rtw_memset((unsigned char *)psta_xmitpriv, 0, sizeof (struct sta_xmit_priv));
        _rtw_spinlock_init(&psta_xmitpriv->lock);
        _init_txservq(&psta_xmitpriv->be_q);
        _init_txservq(&psta_xmitpriv->bk_q);
        _init_txservq(&psta_xmitpriv->vi_q);
        _init_txservq(&psta_xmitpriv->vo_q);
        _rtw_init_listhead(&psta_xmitpriv->legacy_dz);
        _rtw_init_listhead(&psta_xmitpriv->apsd);

_func_exit_;
}

s32     _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
{
        int i;
        struct xmit_buf *pxmitbuf;
        struct xmit_frame *pxframe;
        int     res = _SUCCESS;
        u32 max_xmit_extbuf_size = MAX_XMIT_EXTBUF_SZ;
        u32 num_xmit_extbuf = NR_XMIT_EXTBUFF;

_func_enter_;

        /*  We don't need to memset padapter->XXX to zero, because adapter is allocated by rtw_zvmalloc(). */

        _rtw_spinlock_init(&pxmitpriv->lock);
        _rtw_init_sema(&pxmitpriv->xmit_sema, 0);
        _rtw_init_sema(&pxmitpriv->terminate_xmitthread_sema, 0);

        /*
        Please insert all the queue initializaiton using _rtw_init_queue below
        */

        pxmitpriv->adapter = padapter;

        _rtw_init_queue(&pxmitpriv->be_pending);
        _rtw_init_queue(&pxmitpriv->bk_pending);
        _rtw_init_queue(&pxmitpriv->vi_pending);
        _rtw_init_queue(&pxmitpriv->vo_pending);
        _rtw_init_queue(&pxmitpriv->bm_pending);

        _rtw_init_queue(&pxmitpriv->free_xmit_queue);

        /*
        Please allocate memory with the sz = (struct xmit_frame) * NR_XMITFRAME,
        and initialize free_xmit_frame below.
        Please also apply  free_txobj to link_up all the xmit_frames...
        */

        pxmitpriv->pallocated_frame_buf = rtw_zvmalloc(NR_XMITFRAME * sizeof(struct xmit_frame) + 4);

        if (pxmitpriv->pallocated_frame_buf  == NULL) {
                pxmitpriv->pxmit_frame_buf = NULL;
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("alloc xmit_frame fail!\n"));
                res = _FAIL;
                goto exit;
        }
        pxmitpriv->pxmit_frame_buf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitpriv->pallocated_frame_buf), 4);
        /* pxmitpriv->pxmit_frame_buf = pxmitpriv->pallocated_frame_buf + 4 - */
        /*                                              ((size_t) (pxmitpriv->pallocated_frame_buf) &3); */

        pxframe = (struct xmit_frame *)pxmitpriv->pxmit_frame_buf;

        for (i = 0; i < NR_XMITFRAME; i++) {
                _rtw_init_listhead(&(pxframe->list));

                pxframe->padapter = padapter;
                pxframe->frame_tag = NULL_FRAMETAG;

                pxframe->pkt = NULL;

                pxframe->buf_addr = NULL;
                pxframe->pxmitbuf = NULL;

                rtw_list_insert_tail(&(pxframe->list), &(pxmitpriv->free_xmit_queue.queue));

                pxframe++;
        }

        pxmitpriv->free_xmitframe_cnt = NR_XMITFRAME;

        pxmitpriv->frag_len = MAX_FRAG_THRESHOLD;

        /* init xmit_buf */
        _rtw_init_queue(&pxmitpriv->free_xmitbuf_queue);
        _rtw_init_queue(&pxmitpriv->pending_xmitbuf_queue);

        pxmitpriv->pallocated_xmitbuf = rtw_zvmalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4);

        if (pxmitpriv->pallocated_xmitbuf  == NULL) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("alloc xmit_buf fail!\n"));
                res = _FAIL;
                goto exit;
        }

        pxmitpriv->pxmitbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitpriv->pallocated_xmitbuf), 4);
        /* pxmitpriv->pxmitbuf = pxmitpriv->pallocated_xmitbuf + 4 - */
        /*                                              ((size_t) (pxmitpriv->pallocated_xmitbuf) &3); */

        pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;

        for (i = 0; i < NR_XMITBUFF; i++) {
                _rtw_init_listhead(&pxmitbuf->list);

                pxmitbuf->priv_data = NULL;
                pxmitbuf->padapter = padapter;
                pxmitbuf->ext_tag = false;

                /* Tx buf allocation may fail sometimes, so sleep and retry. */
                res = rtw_os_xmit_resource_alloc(padapter, pxmitbuf, (MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ));
                if (res == _FAIL) {
                        rtw_msleep_os(10);
                        res = rtw_os_xmit_resource_alloc(padapter, pxmitbuf, (MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ));
                        if (res == _FAIL) {
                                goto exit;
                        }
                }

                pxmitbuf->flags = XMIT_VO_QUEUE;

                rtw_list_insert_tail(&pxmitbuf->list, &(pxmitpriv->free_xmitbuf_queue.queue));
                pxmitbuf++;
        }

        pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF;

        /*  Init xmit extension buff */
        _rtw_init_queue(&pxmitpriv->free_xmit_extbuf_queue);

        pxmitpriv->pallocated_xmit_extbuf = rtw_zvmalloc(num_xmit_extbuf * sizeof(struct xmit_buf) + 4);

        if (pxmitpriv->pallocated_xmit_extbuf  == NULL) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("alloc xmit_extbuf fail!\n"));
                res = _FAIL;
                goto exit;
        }

        pxmitpriv->pxmit_extbuf = (u8 *)N_BYTE_ALIGMENT((size_t)(pxmitpriv->pallocated_xmit_extbuf), 4);

        pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmit_extbuf;

        for (i = 0; i < num_xmit_extbuf; i++) {
                _rtw_init_listhead(&pxmitbuf->list);

                pxmitbuf->priv_data = NULL;
                pxmitbuf->padapter = padapter;
                pxmitbuf->ext_tag = true;

                res = rtw_os_xmit_resource_alloc(padapter, pxmitbuf, max_xmit_extbuf_size + XMITBUF_ALIGN_SZ);
                if (res == _FAIL) {
                        res = _FAIL;
                        goto exit;
                }

                rtw_list_insert_tail(&pxmitbuf->list, &(pxmitpriv->free_xmit_extbuf_queue.queue));
                pxmitbuf++;
        }

        pxmitpriv->free_xmit_extbuf_cnt = num_xmit_extbuf;

        rtw_alloc_hwxmits(padapter);
        rtw_init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);

        for (i = 0; i < 4; i++)
                pxmitpriv->wmm_para_seq[i] = i;

        pxmitpriv->txirp_cnt = 1;

        _rtw_init_sema(&(pxmitpriv->tx_retevt), 0);

        /* per AC pending irp */
        pxmitpriv->beq_cnt = 0;
        pxmitpriv->bkq_cnt = 0;
        pxmitpriv->viq_cnt = 0;
        pxmitpriv->voq_cnt = 0;

        pxmitpriv->ack_tx = false;
        _rtw_mutex_init(&pxmitpriv->ack_tx_mutex);
        rtw_sctx_init(&pxmitpriv->ack_tx_ops, 0);

        rtw_hal_init_xmit_priv(padapter);

exit:

_func_exit_;

        return res;
}

static void  rtw_mfree_xmit_priv_lock (struct xmit_priv *pxmitpriv)
{
        _rtw_spinlock_free(&pxmitpriv->lock);
        _rtw_free_sema(&pxmitpriv->xmit_sema);
        _rtw_free_sema(&pxmitpriv->terminate_xmitthread_sema);

        _rtw_spinlock_free(&pxmitpriv->be_pending.lock);
        _rtw_spinlock_free(&pxmitpriv->bk_pending.lock);
        _rtw_spinlock_free(&pxmitpriv->vi_pending.lock);
        _rtw_spinlock_free(&pxmitpriv->vo_pending.lock);
        _rtw_spinlock_free(&pxmitpriv->bm_pending.lock);

        _rtw_spinlock_free(&pxmitpriv->free_xmit_queue.lock);
        _rtw_spinlock_free(&pxmitpriv->free_xmitbuf_queue.lock);
        _rtw_spinlock_free(&pxmitpriv->pending_xmitbuf_queue.lock);
}

void _rtw_free_xmit_priv (struct xmit_priv *pxmitpriv)
{
        int i;
        struct adapter *padapter = pxmitpriv->adapter;
        struct xmit_frame *pxmitframe = (struct xmit_frame *)pxmitpriv->pxmit_frame_buf;
        struct xmit_buf *pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
        u32 max_xmit_extbuf_size = MAX_XMIT_EXTBUF_SZ;
        u32 num_xmit_extbuf = NR_XMIT_EXTBUFF;

 _func_enter_;

        rtw_hal_free_xmit_priv(padapter);

        rtw_mfree_xmit_priv_lock(pxmitpriv);

        if (pxmitpriv->pxmit_frame_buf == NULL)
                goto out;

        for (i = 0; i < NR_XMITFRAME; i++) {
                rtw_os_xmit_complete(padapter, pxmitframe);

                pxmitframe++;
        }

        for (i = 0; i < NR_XMITBUFF; i++) {
                rtw_os_xmit_resource_free(padapter, pxmitbuf, (MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ));
                pxmitbuf++;
        }

        if (pxmitpriv->pallocated_frame_buf)
                rtw_vmfree(pxmitpriv->pallocated_frame_buf, NR_XMITFRAME * sizeof(struct xmit_frame) + 4);

        if (pxmitpriv->pallocated_xmitbuf)
                rtw_vmfree(pxmitpriv->pallocated_xmitbuf, NR_XMITBUFF * sizeof(struct xmit_buf) + 4);

        /*  free xmit extension buff */
        _rtw_spinlock_free(&pxmitpriv->free_xmit_extbuf_queue.lock);

        pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmit_extbuf;
        for (i = 0; i < num_xmit_extbuf; i++) {
                rtw_os_xmit_resource_free(padapter, pxmitbuf, (max_xmit_extbuf_size + XMITBUF_ALIGN_SZ));
                pxmitbuf++;
        }

        if (pxmitpriv->pallocated_xmit_extbuf) {
                rtw_vmfree(pxmitpriv->pallocated_xmit_extbuf, num_xmit_extbuf * sizeof(struct xmit_buf) + 4);
        }

        rtw_free_hwxmits(padapter);

        _rtw_mutex_free(&pxmitpriv->ack_tx_mutex);

out:

_func_exit_;
}

static void update_attrib_vcs_info(struct adapter *padapter, struct xmit_frame *pxmitframe)
{
        u32     sz;
        struct pkt_attrib       *pattrib = &pxmitframe->attrib;
        struct sta_info *psta = pattrib->psta;
        struct mlme_ext_priv    *pmlmeext = &(padapter->mlmeextpriv);
        struct mlme_ext_info    *pmlmeinfo = &(pmlmeext->mlmext_info);

        if (pattrib->nr_frags != 1)
                sz = padapter->xmitpriv.frag_len;
        else /* no frag */
                sz = pattrib->last_txcmdsz;

        /*  (1) RTS_Threshold is compared to the MPDU, not MSDU. */
        /*  (2) If there are more than one frag in  this MSDU, only the first frag uses protection frame. */
        /*              Other fragments are protected by previous fragment. */
        /*              So we only need to check the length of first fragment. */
        if (pmlmeext->cur_wireless_mode < WIRELESS_11_24N  || padapter->registrypriv.wifi_spec) {
                if (sz > padapter->registrypriv.rts_thresh) {
                        pattrib->vcs_mode = RTS_CTS;
                } else {
                        if (psta->rtsen)
                                pattrib->vcs_mode = RTS_CTS;
                        else if (psta->cts2self)
                                pattrib->vcs_mode = CTS_TO_SELF;
                        else
                                pattrib->vcs_mode = NONE_VCS;
                }
        } else {
                while (true) {
                        /* IOT action */
                        if ((pmlmeinfo->assoc_AP_vendor == HT_IOT_PEER_ATHEROS) && pattrib->ampdu_en &&
                            (padapter->securitypriv.dot11PrivacyAlgrthm == _AES_)) {
                                pattrib->vcs_mode = CTS_TO_SELF;
                                break;
                        }

                        /* check ERP protection */
                        if (psta->rtsen || psta->cts2self) {
                                if (psta->rtsen)
                                        pattrib->vcs_mode = RTS_CTS;
                                else if (psta->cts2self)
                                        pattrib->vcs_mode = CTS_TO_SELF;

                                break;
                        }

                        /* check HT op mode */
                        if (pattrib->ht_en) {
                                u8 htopmode = pmlmeinfo->HT_protection;
                                if ((pmlmeext->cur_bwmode && (htopmode == 2 || htopmode == 3)) ||
                                    (!pmlmeext->cur_bwmode && htopmode == 3)) {
                                        pattrib->vcs_mode = RTS_CTS;
                                        break;
                                }
                        }

                        /* check rts */
                        if (sz > padapter->registrypriv.rts_thresh) {
                                pattrib->vcs_mode = RTS_CTS;
                                break;
                        }

                        /* to do list: check MIMO power save condition. */

                        /* check AMPDU aggregation for TXOP */
                        if (pattrib->ampdu_en) {
                                pattrib->vcs_mode = RTS_CTS;
                                break;
                        }

                        pattrib->vcs_mode = NONE_VCS;
                        break;
                }
        }
}

static void update_attrib_phy_info(struct pkt_attrib *pattrib, struct sta_info *psta)
{
        /*if (psta->rtsen)
                pattrib->vcs_mode = RTS_CTS;
        else if (psta->cts2self)
                pattrib->vcs_mode = CTS_TO_SELF;
        else
                pattrib->vcs_mode = NONE_VCS;*/

        pattrib->mdata = 0;
        pattrib->eosp = 0;
        pattrib->triggered = 0;

        /* qos_en, ht_en, init rate, , bw, ch_offset, sgi */
        pattrib->qos_en = psta->qos_option;

        pattrib->raid = psta->raid;
        pattrib->ht_en = psta->htpriv.ht_option;
        pattrib->bwmode = psta->htpriv.bwmode;
        pattrib->ch_offset = psta->htpriv.ch_offset;
        pattrib->sgi = psta->htpriv.sgi;
        pattrib->ampdu_en = false;
        pattrib->retry_ctrl = false;
}

u8      qos_acm(u8 acm_mask, u8 priority)
{
        u8      change_priority = priority;

        switch (priority) {
        case 0:
        case 3:
                if (acm_mask & BIT(1))
                        change_priority = 1;
                break;
        case 1:
        case 2:
                break;
        case 4:
        case 5:
                if (acm_mask & BIT(2))
                        change_priority = 0;
                break;
        case 6:
        case 7:
                if (acm_mask & BIT(3))
                        change_priority = 5;
                break;
        default:
                DBG_88E("qos_acm(): invalid pattrib->priority: %d!!!\n", priority);
                break;
        }

        return change_priority;
}

static void set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib)
{
        struct ethhdr etherhdr;
        struct iphdr ip_hdr;
        s32 user_prio = 0;

        _rtw_open_pktfile(ppktfile->pkt, ppktfile);
        _rtw_pktfile_read(ppktfile, (unsigned char *)&etherhdr, ETH_HLEN);

        /*  get user_prio from IP hdr */
        if (pattrib->ether_type == 0x0800) {
                _rtw_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr));
/*              user_prio = (ntohs(ip_hdr.tos) >> 5) & 0x3; */
                user_prio = ip_hdr.tos >> 5;
        } else if (pattrib->ether_type == 0x888e) {
                /*  "When priority processing of data frames is supported, */
                /*  a STA's SME should send EAPOL-Key frames at the highest priority." */
                user_prio = 7;
        }

        pattrib->priority = user_prio;
        pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN;
        pattrib->subtype = WIFI_QOS_DATA_TYPE;
}

static s32 update_attrib(struct adapter *padapter, struct sk_buff *pkt, struct pkt_attrib *pattrib)
{
        struct pkt_file pktfile;
        struct sta_info *psta = NULL;
        struct ethhdr etherhdr;

        int bmcast;
        struct sta_priv         *pstapriv = &padapter->stapriv;
        struct security_priv    *psecuritypriv = &padapter->securitypriv;
        struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
        struct qos_priv         *pqospriv = &pmlmepriv->qospriv;
        int res = _SUCCESS;

 _func_enter_;

        _rtw_open_pktfile(pkt, &pktfile);
        _rtw_pktfile_read(&pktfile, (u8 *)&etherhdr, ETH_HLEN);

        pattrib->ether_type = ntohs(etherhdr.h_proto);

        memcpy(pattrib->dst, &etherhdr.h_dest, ETH_ALEN);
        memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);

        pattrib->pctrl = 0;

        if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
            check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
                memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
                memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
        } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
                memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
                memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
        } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
                memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
                memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
        }

        pattrib->pktlen = pktfile.pkt_len;

        if (ETH_P_IP == pattrib->ether_type) {
                /*  The following is for DHCP and ARP packet, we use cck1M to tx these packets and let LPS awake some time */
                /*  to prevent DHCP protocol fail */
                u8 tmp[24];
                _rtw_pktfile_read(&pktfile, &tmp[0], 24);
                pattrib->dhcp_pkt = 0;
                if (pktfile.pkt_len > 282) {/* MINIMUM_DHCP_PACKET_SIZE) { */
                        if (ETH_P_IP == pattrib->ether_type) {/*  IP header */
                                if (((tmp[21] == 68) && (tmp[23] == 67)) ||
                                    ((tmp[21] == 67) && (tmp[23] == 68))) {
                                        /*  68 : UDP BOOTP client */
                                        /*  67 : UDP BOOTP server */
                                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("====================== update_attrib: get DHCP Packet\n"));
                                        /*  Use low rate to send DHCP packet. */
                                        pattrib->dhcp_pkt = 1;
                                }
                        }
                }
        } else if (0x888e == pattrib->ether_type) {
                DBG_88E_LEVEL(_drv_info_, "send eapol packet\n");
        }

        if ((pattrib->ether_type == 0x888e) || (pattrib->dhcp_pkt == 1))
                rtw_set_scan_deny(padapter, 3000);

        /*  If EAPOL , ARP , OR DHCP packet, driver must be in active mode. */
        if ((pattrib->ether_type == 0x0806) || (pattrib->ether_type == 0x888e) || (pattrib->dhcp_pkt == 1))
                rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_SPECIAL_PACKET, 1);

        bmcast = IS_MCAST(pattrib->ra);

        /*  get sta_info */
        if (bmcast) {
                psta = rtw_get_bcmc_stainfo(padapter);
        } else {
                psta = rtw_get_stainfo(pstapriv, pattrib->ra);
                if (psta == NULL) { /*  if we cannot get psta => drrp the pkt */
                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_alert_, ("\nupdate_attrib => get sta_info fail, ra: %pM\n", (pattrib->ra)));
                        res = _FAIL;
                        goto exit;
                } else if ((check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) && (!(psta->state & _FW_LINKED))) {
                        res = _FAIL;
                        goto exit;
                }
        }

        if (psta) {
                pattrib->mac_id = psta->mac_id;
                /* DBG_88E("%s ==> mac_id(%d)\n", __func__, pattrib->mac_id); */
                pattrib->psta = psta;
        } else {
                /*  if we cannot get psta => drop the pkt */
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_alert_, ("\nupdate_attrib => get sta_info fail, ra:%pM\n", (pattrib->ra)));
                res = _FAIL;
                goto exit;
        }

        pattrib->ack_policy = 0;
        /*  get ether_hdr_len */
        pattrib->pkt_hdrlen = ETH_HLEN;/* pattrib->ether_type == 0x8100) ? (14 + 4): 14; vlan tag */

        pattrib->hdrlen = WLAN_HDR_A3_LEN;
        pattrib->subtype = WIFI_DATA_TYPE;
        pattrib->priority = 0;

        if (check_fwstate(pmlmepriv, WIFI_AP_STATE|WIFI_ADHOC_STATE|WIFI_ADHOC_MASTER_STATE)) {
                if (psta->qos_option)
                        set_qos(&pktfile, pattrib);
        } else {
                if (pqospriv->qos_option) {
                        set_qos(&pktfile, pattrib);

                        if (pmlmepriv->acm_mask != 0)
                                pattrib->priority = qos_acm(pmlmepriv->acm_mask, pattrib->priority);
                }
        }

        if (psta->ieee8021x_blocked) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("\n psta->ieee8021x_blocked == true\n"));

                pattrib->encrypt = 0;

                if ((pattrib->ether_type != 0x888e) && !check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("\npsta->ieee8021x_blocked == true,  pattrib->ether_type(%.4x) != 0x888e\n", pattrib->ether_type));
                        res = _FAIL;
                        goto exit;
                }
        } else {
                GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);

                switch (psecuritypriv->dot11AuthAlgrthm) {
                case dot11AuthAlgrthm_Open:
                case dot11AuthAlgrthm_Shared:
                case dot11AuthAlgrthm_Auto:
                        pattrib->key_idx = (u8)psecuritypriv->dot11PrivacyKeyIndex;
                        break;
                case dot11AuthAlgrthm_8021X:
                        if (bmcast)
                                pattrib->key_idx = (u8)psecuritypriv->dot118021XGrpKeyid;
                        else
                                pattrib->key_idx = 0;
                        break;
                default:
                        pattrib->key_idx = 0;
                        break;
                }
        }

        switch (pattrib->encrypt) {
        case _WEP40_:
        case _WEP104_:
                pattrib->iv_len = 4;
                pattrib->icv_len = 4;
                break;
        case _TKIP_:
                pattrib->iv_len = 8;
                pattrib->icv_len = 4;

                if (padapter->securitypriv.busetkipkey == _FAIL) {
                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_,
                                 ("\npadapter->securitypriv.busetkipkey(%d) == _FAIL drop packet\n",
                                 padapter->securitypriv.busetkipkey));
                        res = _FAIL;
                        goto exit;
                }
                break;
        case _AES_:
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("pattrib->encrypt=%d (_AES_)\n", pattrib->encrypt));
                pattrib->iv_len = 8;
                pattrib->icv_len = 8;
                break;
        default:
                pattrib->iv_len = 0;
                pattrib->icv_len = 0;
                break;
        }

        RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_,
                 ("update_attrib: encrypt=%d  securitypriv.sw_encrypt=%d\n",
                  pattrib->encrypt, padapter->securitypriv.sw_encrypt));

        if (pattrib->encrypt &&
            (padapter->securitypriv.sw_encrypt || !psecuritypriv->hw_decrypted)) {
                pattrib->bswenc = true;
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_,
                         ("update_attrib: encrypt=%d securitypriv.hw_decrypted=%d bswenc = true\n",
                          pattrib->encrypt, padapter->securitypriv.sw_encrypt));
        } else {
                pattrib->bswenc = false;
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("update_attrib: bswenc = false\n"));
        }

        rtw_set_tx_chksum_offload(pkt, pattrib);

        update_attrib_phy_info(pattrib, psta);

exit:

_func_exit_;

        return res;
}

static s32 xmitframe_addmic(struct adapter *padapter, struct xmit_frame *pxmitframe)
{
        int curfragnum, length;
        u8      *pframe, *payload, mic[8];
        struct  mic_data micdata;
        struct  sta_info *stainfo;
        struct  pkt_attrib *pattrib = &pxmitframe->attrib;
        struct  security_priv   *psecuritypriv = &padapter->securitypriv;
        struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
        u8 priority[4] = {0x0, 0x0, 0x0, 0x0};
        u8 hw_hdr_offset = 0;
        int bmcst = IS_MCAST(pattrib->ra);

        if (pattrib->psta)
                stainfo = pattrib->psta;
        else
                stainfo = rtw_get_stainfo(&padapter->stapriv , &pattrib->ra[0]);

_func_enter_;

        hw_hdr_offset = TXDESC_SIZE + (pxmitframe->pkt_offset * PACKET_OFFSET_SZ);;

        if (pattrib->encrypt == _TKIP_) {/* if (psecuritypriv->dot11PrivacyAlgrthm == _TKIP_PRIVACY_) */
                /* encode mic code */
                if (stainfo != NULL) {
                        u8 null_key[16] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
                                           0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
                                           0x0, 0x0};

                        pframe = pxmitframe->buf_addr + hw_hdr_offset;

                        if (bmcst) {
                                if (_rtw_memcmp(psecuritypriv->dot118021XGrptxmickey[psecuritypriv->dot118021XGrpKeyid].skey, null_key, 16))
                                        return _FAIL;
                                /* start to calculate the mic code */
                                rtw_secmicsetkey(&micdata, psecuritypriv->dot118021XGrptxmickey[psecuritypriv->dot118021XGrpKeyid].skey);
                        } else {
                                if (_rtw_memcmp(&stainfo->dot11tkiptxmickey.skey[0], null_key, 16) == true) {
                                        /* DbgPrint("\nxmitframe_addmic:stainfo->dot11tkiptxmickey == 0\n"); */
                                        /* rtw_msleep_os(10); */
                                        return _FAIL;
                                }
                                /* start to calculate the mic code */
                                rtw_secmicsetkey(&micdata, &stainfo->dot11tkiptxmickey.skey[0]);
                        }

                        if (pframe[1]&1) {   /* ToDS == 1 */
                                rtw_secmicappend(&micdata, &pframe[16], 6);  /* DA */
                                if (pframe[1]&2)  /* From Ds == 1 */
                                        rtw_secmicappend(&micdata, &pframe[24], 6);
                                else
                                rtw_secmicappend(&micdata, &pframe[10], 6);
                        } else {        /* ToDS == 0 */
                                rtw_secmicappend(&micdata, &pframe[4], 6);   /* DA */
                                if (pframe[1]&2)  /* From Ds == 1 */
                                        rtw_secmicappend(&micdata, &pframe[16], 6);
                                else
                                        rtw_secmicappend(&micdata, &pframe[10], 6);
                        }

                        if (pattrib->qos_en)
                                priority[0] = (u8)pxmitframe->attrib.priority;

                        rtw_secmicappend(&micdata, &priority[0], 4);

                        payload = pframe;

                        for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) {
                                payload = (u8 *)RND4((size_t)(payload));
                                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_,
                                         ("=== curfragnum=%d, pframe = 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x, 0x%.2x,!!!\n",
                                         curfragnum, *payload, *(payload+1),
                                         *(payload+2), *(payload+3),
                                         *(payload+4), *(payload+5),
                                         *(payload+6), *(payload+7)));

                                payload = payload+pattrib->hdrlen+pattrib->iv_len;
                                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_,
                                         ("curfragnum=%d pattrib->hdrlen=%d pattrib->iv_len=%d",
                                         curfragnum, pattrib->hdrlen, pattrib->iv_len));
                                if ((curfragnum+1) == pattrib->nr_frags) {
                                        length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-((pattrib->bswenc) ? pattrib->icv_len : 0);
                                        rtw_secmicappend(&micdata, payload, length);
                                        payload = payload+length;
                                } else {
                                        length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-((pattrib->bswenc) ? pattrib->icv_len : 0);
                                        rtw_secmicappend(&micdata, payload, length);
                                        payload = payload+length+pattrib->icv_len;
                                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("curfragnum=%d length=%d pattrib->icv_len=%d", curfragnum, length, pattrib->icv_len));
                                }
                        }
                        rtw_secgetmic(&micdata, &(mic[0]));
                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("xmitframe_addmic: before add mic code!!!\n"));
                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("xmitframe_addmic: pattrib->last_txcmdsz=%d!!!\n", pattrib->last_txcmdsz));
                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("xmitframe_addmic: mic[0]=0x%.2x , mic[1]=0x%.2x , mic[2]= 0x%.2x, mic[3]=0x%.2x\n\
  mic[4]= 0x%.2x , mic[5]= 0x%.2x , mic[6]= 0x%.2x , mic[7]= 0x%.2x !!!!\n",
                                mic[0], mic[1], mic[2], mic[3], mic[4], mic[5], mic[6], mic[7]));
                        /* add mic code  and add the mic code length in last_txcmdsz */

                        memcpy(payload, &(mic[0]), 8);
                        pattrib->last_txcmdsz += 8;

                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("\n ======== last pkt ========\n"));
                        payload = payload-pattrib->last_txcmdsz+8;
                        for (curfragnum = 0; curfragnum < pattrib->last_txcmdsz; curfragnum = curfragnum+8)
                                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_,
                                                 (" %.2x,  %.2x,  %.2x,  %.2x,  %.2x,  %.2x,  %.2x,  %.2x ",
                                                 *(payload+curfragnum), *(payload+curfragnum+1),
                                                 *(payload+curfragnum+2), *(payload+curfragnum+3),
                                                 *(payload+curfragnum+4), *(payload+curfragnum+5),
                                                 *(payload+curfragnum+6), *(payload+curfragnum+7)));
                        } else {
                                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("xmitframe_addmic: rtw_get_stainfo==NULL!!!\n"));
                        }
        }

_func_exit_;

        return _SUCCESS;
}

static s32 xmitframe_swencrypt(struct adapter *padapter, struct xmit_frame *pxmitframe)
{
        struct  pkt_attrib       *pattrib = &pxmitframe->attrib;

_func_enter_;

        if (pattrib->bswenc) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_alert_, ("### xmitframe_swencrypt\n"));
                switch (pattrib->encrypt) {
                case _WEP40_:
                case _WEP104_:
                        rtw_wep_encrypt(padapter, (u8 *)pxmitframe);
                        break;
                case _TKIP_:
                        rtw_tkip_encrypt(padapter, (u8 *)pxmitframe);
                        break;
                case _AES_:
                        rtw_aes_encrypt(padapter, (u8 *)pxmitframe);
                        break;
                default:
                        break;
                }
        } else {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_notice_, ("### xmitframe_hwencrypt\n"));
        }

_func_exit_;

        return _SUCCESS;
}

s32 rtw_make_wlanhdr (struct adapter *padapter , u8 *hdr, struct pkt_attrib *pattrib)
{
        u16 *qc;

        struct rtw_ieee80211_hdr *pwlanhdr = (struct rtw_ieee80211_hdr *)hdr;
        struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
        struct qos_priv *pqospriv = &pmlmepriv->qospriv;
        u8 qos_option = false;

        int res = _SUCCESS;
        u16 *fctrl = &pwlanhdr->frame_ctl;

        struct sta_info *psta;

        int bmcst = IS_MCAST(pattrib->ra);

_func_enter_;

        if (pattrib->psta) {
                psta = pattrib->psta;
        } else {
                if (bmcst) {
                        psta = rtw_get_bcmc_stainfo(padapter);
                } else {
                        psta = rtw_get_stainfo(&padapter->stapriv, pattrib->ra);
                }
        }

        _rtw_memset(hdr, 0, WLANHDR_OFFSET);

        SetFrameSubType(fctrl, pattrib->subtype);

        if (pattrib->subtype & WIFI_DATA_TYPE) {
                if ((check_fwstate(pmlmepriv,  WIFI_STATION_STATE) == true)) {
                        /* to_ds = 1, fr_ds = 0; */
                        /* Data transfer to AP */
                        SetToDs(fctrl);
                        memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv), ETH_ALEN);
                        memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
                        memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);

                        if (pqospriv->qos_option)
                                qos_option = true;
                } else if (check_fwstate(pmlmepriv,  WIFI_AP_STATE)) {
                        /* to_ds = 0, fr_ds = 1; */
                        SetFrDs(fctrl);
                        memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
                        memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv), ETH_ALEN);
                        memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);

                        if (psta->qos_option)
                                qos_option = true;
                } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
                           check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
                        memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
                        memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
                        memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv), ETH_ALEN);

                        if (psta->qos_option)
                                qos_option = true;
                } else {
                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("fw_state:%x is not allowed to xmit frame\n", get_fwstate(pmlmepriv)));
                        res = _FAIL;
                        goto exit;
                }

                if (pattrib->mdata)
                        SetMData(fctrl);

                if (pattrib->encrypt)
                        SetPrivacy(fctrl);

                if (qos_option) {
                        qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);

                        if (pattrib->priority)
                                SetPriority(qc, pattrib->priority);

                        SetEOSP(qc, pattrib->eosp);

                        SetAckpolicy(qc, pattrib->ack_policy);
                }

                /* TODO: fill HT Control Field */

                /* Update Seq Num will be handled by f/w */
                if (psta) {
                        psta->sta_xmitpriv.txseq_tid[pattrib->priority]++;
                        psta->sta_xmitpriv.txseq_tid[pattrib->priority] &= 0xFFF;

                        pattrib->seqnum = psta->sta_xmitpriv.txseq_tid[pattrib->priority];

                        SetSeqNum(hdr, pattrib->seqnum);

                        /* check if enable ampdu */
                        if (pattrib->ht_en && psta->htpriv.ampdu_enable) {
                                if (psta->htpriv.agg_enable_bitmap & BIT(pattrib->priority))
                                pattrib->ampdu_en = true;
                        }

                        /* re-check if enable ampdu by BA_starting_seqctrl */
                        if (pattrib->ampdu_en) {
                                u16 tx_seq;

                                tx_seq = psta->BA_starting_seqctrl[pattrib->priority & 0x0f];

                                /* check BA_starting_seqctrl */
                                if (SN_LESS(pattrib->seqnum, tx_seq)) {
                                        pattrib->ampdu_en = false;/* AGG BK */
                                } else if (SN_EQUAL(pattrib->seqnum, tx_seq)) {
                                        psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (tx_seq+1)&0xfff;

                                        pattrib->ampdu_en = true;/* AGG EN */
                                } else {
                                        psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (pattrib->seqnum+1)&0xfff;
                                        pattrib->ampdu_en = true;/* AGG EN */
                                }
                        }
                }
        }
exit:

_func_exit_;
        return res;
}

s32 rtw_txframes_pending(struct adapter *padapter)
{
        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;

        return ((_rtw_queue_empty(&pxmitpriv->be_pending) == false) ||
                         (_rtw_queue_empty(&pxmitpriv->bk_pending) == false) ||
                         (_rtw_queue_empty(&pxmitpriv->vi_pending) == false) ||
                         (_rtw_queue_empty(&pxmitpriv->vo_pending) == false));
}

s32 rtw_txframes_sta_ac_pending(struct adapter *padapter, struct pkt_attrib *pattrib)
{
        struct sta_info *psta;
        struct tx_servq *ptxservq;
        int priority = pattrib->priority;

        psta = pattrib->psta;

        switch (priority) {
        case 1:
        case 2:
                ptxservq = &(psta->sta_xmitpriv.bk_q);
                break;
        case 4:
        case 5:
                ptxservq = &(psta->sta_xmitpriv.vi_q);
                break;
        case 6:
        case 7:
                ptxservq = &(psta->sta_xmitpriv.vo_q);
                break;
        case 0:
        case 3:
        default:
                ptxservq = &(psta->sta_xmitpriv.be_q);
                break;
        }

        return ptxservq->qcnt;
}

/*
 * Calculate wlan 802.11 packet MAX size from pkt_attrib
 * This function doesn't consider fragment case
 */
u32 rtw_calculate_wlan_pkt_size_by_attribue(struct pkt_attrib *pattrib)
{
        u32     len = 0;

        len = pattrib->hdrlen + pattrib->iv_len; /*  WLAN Header and IV */
        len += SNAP_SIZE + sizeof(u16); /*  LLC */
        len += pattrib->pktlen;
        if (pattrib->encrypt == _TKIP_)
                len += 8; /*  MIC */
        len += ((pattrib->bswenc) ? pattrib->icv_len : 0); /*  ICV */

        return len;
}

/*

This sub-routine will perform all the following:

1. remove 802.3 header.
2. create wlan_header, based on the info in pxmitframe
3. append sta's iv/ext-iv
4. append LLC
5. move frag chunk from pframe to pxmitframe->mem
6. apply sw-encrypt, if necessary.

*/
s32 rtw_xmitframe_coalesce(struct adapter *padapter, struct sk_buff *pkt, struct xmit_frame *pxmitframe)
{
        struct pkt_file pktfile;
        s32 frg_inx, frg_len, mpdu_len, llc_sz, mem_sz;
        size_t addr;
        u8 *pframe, *mem_start;
        u8 hw_hdr_offset;
        struct sta_info         *psta;
        struct xmit_priv        *pxmitpriv = &padapter->xmitpriv;
        struct pkt_attrib       *pattrib = &pxmitframe->attrib;
        u8 *pbuf_start;
        s32 bmcst = IS_MCAST(pattrib->ra);
        s32 res = _SUCCESS;

_func_enter_;

        psta = rtw_get_stainfo(&padapter->stapriv, pattrib->ra);

        if (psta == NULL)
                return _FAIL;

        if (pxmitframe->buf_addr == NULL) {
                DBG_88E("==> %s buf_addr == NULL\n", __func__);
                return _FAIL;
        }

        pbuf_start = pxmitframe->buf_addr;

        hw_hdr_offset =  TXDESC_SIZE + (pxmitframe->pkt_offset * PACKET_OFFSET_SZ);

        mem_start = pbuf_start +        hw_hdr_offset;

        if (rtw_make_wlanhdr(padapter, mem_start, pattrib) == _FAIL) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("rtw_xmitframe_coalesce: rtw_make_wlanhdr fail; drop pkt\n"));
                DBG_88E("rtw_xmitframe_coalesce: rtw_make_wlanhdr fail; drop pkt\n");
                res = _FAIL;
                goto exit;
        }

        _rtw_open_pktfile(pkt, &pktfile);
        _rtw_pktfile_read(&pktfile, NULL, pattrib->pkt_hdrlen);

        frg_inx = 0;
        frg_len = pxmitpriv->frag_len - 4;/* 2346-4 = 2342 */

        while (1) {
                llc_sz = 0;

                mpdu_len = frg_len;

                pframe = mem_start;

                SetMFrag(mem_start);

                pframe += pattrib->hdrlen;
                mpdu_len -= pattrib->hdrlen;

                /* adding icv, if necessary... */
                if (pattrib->iv_len) {
                        if (psta != NULL) {
                                switch (pattrib->encrypt) {
                                case _WEP40_:
                                case _WEP104_:
                                        WEP_IV(pattrib->iv, psta->dot11txpn, pattrib->key_idx);
                                        break;
                                case _TKIP_:
                                        if (bmcst)
                                                TKIP_IV(pattrib->iv, psta->dot11txpn, pattrib->key_idx);
                                        else
                                                TKIP_IV(pattrib->iv, psta->dot11txpn, 0);
                                        break;
                                case _AES_:
                                        if (bmcst)
                                                AES_IV(pattrib->iv, psta->dot11txpn, pattrib->key_idx);
                                        else
                                                AES_IV(pattrib->iv, psta->dot11txpn, 0);
                                        break;
                                }
                        }

                        memcpy(pframe, pattrib->iv, pattrib->iv_len);

                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_notice_,
                                 ("rtw_xmitframe_coalesce: keyid=%d pattrib->iv[3]=%.2x pframe=%.2x %.2x %.2x %.2x\n",
                                  padapter->securitypriv.dot11PrivacyKeyIndex, pattrib->iv[3], *pframe, *(pframe+1), *(pframe+2), *(pframe+3)));

                        pframe += pattrib->iv_len;

                        mpdu_len -= pattrib->iv_len;
                }

                if (frg_inx == 0) {
                        llc_sz = rtw_put_snap(pframe, pattrib->ether_type);
                        pframe += llc_sz;
                        mpdu_len -= llc_sz;
                }

                if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
                        mpdu_len -= pattrib->icv_len;
                }

                if (bmcst) {
                        /*  don't do fragment to broadcat/multicast packets */
                        mem_sz = _rtw_pktfile_read(&pktfile, pframe, pattrib->pktlen);
                } else {
                        mem_sz = _rtw_pktfile_read(&pktfile, pframe, mpdu_len);
                }

                pframe += mem_sz;

                if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
                        memcpy(pframe, pattrib->icv, pattrib->icv_len);
                        pframe += pattrib->icv_len;
                }

                frg_inx++;

                if (bmcst || rtw_endofpktfile(&pktfile)) {
                        pattrib->nr_frags = frg_inx;

                        pattrib->last_txcmdsz = pattrib->hdrlen + pattrib->iv_len + ((pattrib->nr_frags == 1) ? llc_sz : 0) +
                                                ((pattrib->bswenc) ? pattrib->icv_len : 0) + mem_sz;

                        ClearMFrag(mem_start);

                        break;
                } else {
                        RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("%s: There're still something in packet!\n", __func__));
                }

                addr = (size_t)(pframe);

                mem_start = (unsigned char *)RND4(addr) + hw_hdr_offset;
                memcpy(mem_start, pbuf_start + hw_hdr_offset, pattrib->hdrlen);
        }

        if (xmitframe_addmic(padapter, pxmitframe) == _FAIL) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("xmitframe_addmic(padapter, pxmitframe) == _FAIL\n"));
                DBG_88E("xmitframe_addmic(padapter, pxmitframe) == _FAIL\n");
                res = _FAIL;
                goto exit;
        }

        xmitframe_swencrypt(padapter, pxmitframe);

        if (!bmcst)
                update_attrib_vcs_info(padapter, pxmitframe);
        else
                pattrib->vcs_mode = NONE_VCS;

exit:

_func_exit_;

        return res;
}

/* Logical Link Control(LLC) SubNetwork Attachment Point(SNAP) header
 * IEEE LLC/SNAP header contains 8 octets
 * First 3 octets comprise the LLC portion
 * SNAP portion, 5 octets, is divided into two fields:
 *      Organizationally Unique Identifier(OUI), 3 octets,
 *      type, defined by that organization, 2 octets.
 */
s32 rtw_put_snap(u8 *data, u16 h_proto)
{
        struct ieee80211_snap_hdr *snap;
        u8 *oui;

_func_enter_;

        snap = (struct ieee80211_snap_hdr *)data;
        snap->dsap = 0xaa;
        snap->ssap = 0xaa;
        snap->ctrl = 0x03;

        if (h_proto == 0x8137 || h_proto == 0x80f3)
                oui = P802_1H_OUI;
        else
                oui = RFC1042_OUI;

        snap->oui[0] = oui[0];
        snap->oui[1] = oui[1];
        snap->oui[2] = oui[2];

        *(__be16 *)(data + SNAP_SIZE) = htons(h_proto);

_func_exit_;

        return SNAP_SIZE + sizeof(u16);
}

void rtw_update_protection(struct adapter *padapter, u8 *ie, uint ie_len)
{
        uint    protection;
        u8      *perp;
        int      erp_len;
        struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
        struct  registry_priv *pregistrypriv = &padapter->registrypriv;

_func_enter_;

        switch (pxmitpriv->vcs_setting) {
        case DISABLE_VCS:
                pxmitpriv->vcs = NONE_VCS;
                break;
        case ENABLE_VCS:
                break;
        case AUTO_VCS:
        default:
                perp = rtw_get_ie(ie, _ERPINFO_IE_, &erp_len, ie_len);
                if (perp == NULL) {
                        pxmitpriv->vcs = NONE_VCS;
                } else {
                        protection = (*(perp + 2)) & BIT(1);
                        if (protection) {
                                if (pregistrypriv->vcs_type == RTS_CTS)
                                        pxmitpriv->vcs = RTS_CTS;
                                else
                                        pxmitpriv->vcs = CTS_TO_SELF;
                        } else {
                                pxmitpriv->vcs = NONE_VCS;
                        }
                }
                break;
        }

_func_exit_;
}

void rtw_count_tx_stats(struct adapter *padapter, struct xmit_frame *pxmitframe, int sz)
{
        struct sta_info *psta = NULL;
        struct stainfo_stats *pstats = NULL;
        struct xmit_priv        *pxmitpriv = &padapter->xmitpriv;
        struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;

        if ((pxmitframe->frame_tag&0x0f) == DATA_FRAMETAG) {
                pxmitpriv->tx_bytes += sz;
                pmlmepriv->LinkDetectInfo.NumTxOkInPeriod += pxmitframe->agg_num;

                psta = pxmitframe->attrib.psta;
                if (psta) {
                        pstats = &psta->sta_stats;
                        pstats->tx_pkts += pxmitframe->agg_num;
                        pstats->tx_bytes += sz;
                }
        }
}

struct xmit_buf *rtw_alloc_xmitbuf_ext(struct xmit_priv *pxmitpriv)
{
        unsigned long irql;
        struct xmit_buf *pxmitbuf =  NULL;
        struct list_head *plist, *phead;
        struct __queue *pfree_queue = &pxmitpriv->free_xmit_extbuf_queue;

_func_enter_;

        _enter_critical(&pfree_queue->lock, &irql);

        if (_rtw_queue_empty(pfree_queue) == true) {
                pxmitbuf = NULL;
        } else {
                phead = get_list_head(pfree_queue);

                plist = get_next(phead);

                pxmitbuf = LIST_CONTAINOR(plist, struct xmit_buf, list);

                rtw_list_delete(&(pxmitbuf->list));
        }

        if (pxmitbuf !=  NULL) {
                pxmitpriv->free_xmit_extbuf_cnt--;

                pxmitbuf->priv_data = NULL;
                /* pxmitbuf->ext_tag = true; */

                if (pxmitbuf->sctx) {
                        DBG_88E("%s pxmitbuf->sctx is not NULL\n", __func__);
                        rtw_sctx_done_err(&pxmitbuf->sctx, RTW_SCTX_DONE_BUF_ALLOC);
                }
        }

        _exit_critical(&pfree_queue->lock, &irql);

_func_exit_;

        return pxmitbuf;
}

s32 rtw_free_xmitbuf_ext(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
{
        unsigned long irql;
        struct __queue *pfree_queue = &pxmitpriv->free_xmit_extbuf_queue;

_func_enter_;

        if (pxmitbuf == NULL)
                return _FAIL;

        _enter_critical(&pfree_queue->lock, &irql);

        rtw_list_delete(&pxmitbuf->list);

        rtw_list_insert_tail(&(pxmitbuf->list), get_list_head(pfree_queue));
        pxmitpriv->free_xmit_extbuf_cnt++;

        _exit_critical(&pfree_queue->lock, &irql);

_func_exit_;

        return _SUCCESS;
}

struct xmit_buf *rtw_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
{
        unsigned long irql;
        struct xmit_buf *pxmitbuf =  NULL;
        struct list_head *plist, *phead;
        struct __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;

_func_enter_;

        /* DBG_88E("+rtw_alloc_xmitbuf\n"); */

        _enter_critical(&pfree_xmitbuf_queue->lock, &irql);

        if (_rtw_queue_empty(pfree_xmitbuf_queue) == true) {
                pxmitbuf = NULL;
        } else {
                phead = get_list_head(pfree_xmitbuf_queue);

                plist = get_next(phead);

                pxmitbuf = LIST_CONTAINOR(plist, struct xmit_buf, list);

                rtw_list_delete(&(pxmitbuf->list));
        }

        if (pxmitbuf !=  NULL) {
                pxmitpriv->free_xmitbuf_cnt--;
                pxmitbuf->priv_data = NULL;
                if (pxmitbuf->sctx) {
                        DBG_88E("%s pxmitbuf->sctx is not NULL\n", __func__);
                        rtw_sctx_done_err(&pxmitbuf->sctx, RTW_SCTX_DONE_BUF_ALLOC);
                }
        }
        _exit_critical(&pfree_xmitbuf_queue->lock, &irql);

_func_exit_;

        return pxmitbuf;
}

s32 rtw_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
{
        unsigned long irql;
        struct __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;

_func_enter_;
        if (pxmitbuf == NULL)
                return _FAIL;

        if (pxmitbuf->sctx) {
                DBG_88E("%s pxmitbuf->sctx is not NULL\n", __func__);
                rtw_sctx_done_err(&pxmitbuf->sctx, RTW_SCTX_DONE_BUF_FREE);
        }

        if (pxmitbuf->ext_tag) {
                rtw_free_xmitbuf_ext(pxmitpriv, pxmitbuf);
        } else {
                _enter_critical(&pfree_xmitbuf_queue->lock, &irql);

                rtw_list_delete(&pxmitbuf->list);

                rtw_list_insert_tail(&(pxmitbuf->list), get_list_head(pfree_xmitbuf_queue));

                pxmitpriv->free_xmitbuf_cnt++;
                _exit_critical(&pfree_xmitbuf_queue->lock, &irql);
        }

_func_exit_;

        return _SUCCESS;
}

/*
Calling context:
1. OS_TXENTRY
2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)

If we turn on USE_RXTHREAD, then, no need for critical section.
Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...

Must be very very cautious...

*/

struct xmit_frame *rtw_alloc_xmitframe(struct xmit_priv *pxmitpriv)/* _queue *pfree_xmit_queue) */
{
        /*
                Please remember to use all the osdep_service api,
                and lock/unlock or _enter/_exit critical to protect
                pfree_xmit_queue
        */

        unsigned long irql;
        struct xmit_frame *pxframe = NULL;
        struct list_head *plist, *phead;
        struct __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;

_func_enter_;

        _enter_critical_bh(&pfree_xmit_queue->lock, &irql);

        if (_rtw_queue_empty(pfree_xmit_queue) == true) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("rtw_alloc_xmitframe:%d\n", pxmitpriv->free_xmitframe_cnt));
                pxframe =  NULL;
        } else {
                phead = get_list_head(pfree_xmit_queue);

                plist = get_next(phead);

                pxframe = LIST_CONTAINOR(plist, struct xmit_frame, list);

                rtw_list_delete(&(pxframe->list));
        }

        if (pxframe !=  NULL) { /* default value setting */
                pxmitpriv->free_xmitframe_cnt--;

                RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("rtw_alloc_xmitframe():free_xmitframe_cnt=%d\n", pxmitpriv->free_xmitframe_cnt));

                pxframe->buf_addr = NULL;
                pxframe->pxmitbuf = NULL;

                _rtw_memset(&pxframe->attrib, 0, sizeof(struct pkt_attrib));
                /* pxframe->attrib.psta = NULL; */

                pxframe->frame_tag = DATA_FRAMETAG;

                pxframe->pkt = NULL;
                pxframe->pkt_offset = 1;/* default use pkt_offset to fill tx desc */

                pxframe->agg_num = 1;
                pxframe->ack_report = 0;
        }

        _exit_critical_bh(&pfree_xmit_queue->lock, &irql);

_func_exit_;

        return pxframe;
}

s32 rtw_free_xmitframe(struct xmit_priv *pxmitpriv, struct xmit_frame *pxmitframe)
{
        unsigned long irql;
        struct __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
        struct adapter *padapter = pxmitpriv->adapter;
        struct sk_buff *pndis_pkt = NULL;

_func_enter_;

        if (pxmitframe == NULL) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("====== rtw_free_xmitframe():pxmitframe == NULL!!!!!!!!!!\n"));
                goto exit;
        }

        _enter_critical_bh(&pfree_xmit_queue->lock, &irql);

        rtw_list_delete(&pxmitframe->list);

        if (pxmitframe->pkt) {
                pndis_pkt = pxmitframe->pkt;
                pxmitframe->pkt = NULL;
        }

        rtw_list_insert_tail(&pxmitframe->list, get_list_head(pfree_xmit_queue));

        pxmitpriv->free_xmitframe_cnt++;
        RT_TRACE(_module_rtl871x_xmit_c_, _drv_debug_, ("rtw_free_xmitframe():free_xmitframe_cnt=%d\n", pxmitpriv->free_xmitframe_cnt));

        _exit_critical_bh(&pfree_xmit_queue->lock, &irql);

        if (pndis_pkt)
                rtw_os_pkt_complete(padapter, pndis_pkt);

exit:

_func_exit_;

        return _SUCCESS;
}

void rtw_free_xmitframe_queue(struct xmit_priv *pxmitpriv, struct __queue *pframequeue)
{
        unsigned long irql;
        struct list_head *plist, *phead;
        struct  xmit_frame      *pxmitframe;

_func_enter_;

        _enter_critical_bh(&(pframequeue->lock), &irql);

        phead = get_list_head(pframequeue);
        plist = get_next(phead);

        while (!rtw_end_of_queue_search(phead, plist)) {
                pxmitframe = LIST_CONTAINOR(plist, struct xmit_frame, list);

                plist = get_next(plist);

                rtw_free_xmitframe(pxmitpriv, pxmitframe);
        }
        _exit_critical_bh(&(pframequeue->lock), &irql);

_func_exit_;
}

s32 rtw_xmitframe_enqueue(struct adapter *padapter, struct xmit_frame *pxmitframe)
{
        if (rtw_xmit_classifier(padapter, pxmitframe) == _FAIL) {
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_,
                         ("rtw_xmitframe_enqueue: drop xmit pkt for classifier fail\n"));
/*              pxmitframe->pkt = NULL; */
                return _FAIL;
        }

        return _SUCCESS;
}

static struct xmit_frame *dequeue_one_xmitframe(struct xmit_priv *pxmitpriv, struct hw_xmit *phwxmit, struct tx_servq *ptxservq, struct __queue *pframe_queue)
{
        struct list_head *xmitframe_plist, *xmitframe_phead;
        struct  xmit_frame      *pxmitframe = NULL;

        xmitframe_phead = get_list_head(pframe_queue);
        xmitframe_plist = get_next(xmitframe_phead);

        while (!rtw_end_of_queue_search(xmitframe_phead, xmitframe_plist)) {
                pxmitframe = LIST_CONTAINOR(xmitframe_plist, struct xmit_frame, list);

                xmitframe_plist = get_next(xmitframe_plist);

                rtw_list_delete(&pxmitframe->list);

                ptxservq->qcnt--;

                break;

                pxmitframe = NULL;
        }

        return pxmitframe;
}

struct xmit_frame *rtw_dequeue_xframe(struct xmit_priv *pxmitpriv, struct hw_xmit *phwxmit_i, int entry)
{
        unsigned long irql0;
        struct list_head *sta_plist, *sta_phead;
        struct hw_xmit *phwxmit;
        struct tx_servq *ptxservq = NULL;
        struct __queue *pframe_queue = NULL;
        struct xmit_frame *pxmitframe = NULL;
        struct adapter *padapter = pxmitpriv->adapter;
        struct registry_priv    *pregpriv = &padapter->registrypriv;
        int i, inx[4];

_func_enter_;

        inx[0] = 0; inx[1] = 1; inx[2] = 2; inx[3] = 3;

        if (pregpriv->wifi_spec == 1) {
                int j;

                for (j = 0; j < 4; j++)
                        inx[j] = pxmitpriv->wmm_para_seq[j];
        }

        _enter_critical_bh(&pxmitpriv->lock, &irql0);

        for (i = 0; i < entry; i++) {
                phwxmit = phwxmit_i + inx[i];

                sta_phead = get_list_head(phwxmit->sta_queue);
                sta_plist = get_next(sta_phead);

                while (!rtw_end_of_queue_search(sta_phead, sta_plist)) {
                        ptxservq = LIST_CONTAINOR(sta_plist, struct tx_servq, tx_pending);

                        pframe_queue = &ptxservq->sta_pending;

                        pxmitframe = dequeue_one_xmitframe(pxmitpriv, phwxmit, ptxservq, pframe_queue);

                        if (pxmitframe) {
                                phwxmit->accnt--;

                                /* Remove sta node when there are no pending packets. */
                                if (_rtw_queue_empty(pframe_queue)) /* must be done after get_next and before break */
                                        rtw_list_delete(&ptxservq->tx_pending);
                                goto exit;
                        }

                        sta_plist = get_next(sta_plist);
                }
        }
exit:
        _exit_critical_bh(&pxmitpriv->lock, &irql0);
_func_exit_;
        return pxmitframe;
}

struct tx_servq *rtw_get_sta_pending(struct adapter *padapter, struct sta_info *psta, int up, u8 *ac)
{
        struct tx_servq *ptxservq;

_func_enter_;
        switch (up) {
        case 1:
        case 2:
                ptxservq = &(psta->sta_xmitpriv.bk_q);
                *(ac) = 3;
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("rtw_get_sta_pending : BK\n"));
                break;
        case 4:
        case 5:
                ptxservq = &(psta->sta_xmitpriv.vi_q);
                *(ac) = 1;
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("rtw_get_sta_pending : VI\n"));
                break;
        case 6:
        case 7:
                ptxservq = &(psta->sta_xmitpriv.vo_q);
                *(ac) = 0;
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("rtw_get_sta_pending : VO\n"));
                break;
        case 0:
        case 3:
        default:
                ptxservq = &(psta->sta_xmitpriv.be_q);
                *(ac) = 2;
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("rtw_get_sta_pending : BE\n"));
        break;
        }

_func_exit_;

        return ptxservq;
}

/*
 * Will enqueue pxmitframe to the proper queue,
 * and indicate it to xx_pending list.....
 */
s32 rtw_xmit_classifier(struct adapter *padapter, struct xmit_frame *pxmitframe)
{
        /* unsigned long irql0; */
        u8      ac_index;
        struct sta_info *psta;
        struct tx_servq *ptxservq;
        struct pkt_attrib       *pattrib = &pxmitframe->attrib;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct hw_xmit  *phwxmits =  padapter->xmitpriv.hwxmits;
        int res = _SUCCESS;

_func_enter_;

        if (pattrib->psta) {
                psta = pattrib->psta;
        } else {
                psta = rtw_get_stainfo(pstapriv, pattrib->ra);
        }

        if (psta == NULL) {
                res = _FAIL;
                DBG_88E("rtw_xmit_classifier: psta == NULL\n");
                RT_TRACE(_module_rtl871x_xmit_c_, _drv_err_, ("rtw_xmit_classifier: psta == NULL\n"));
                goto exit;
        }

        ptxservq = rtw_get_sta_pending(padapter, psta, pattrib->priority, (u8 *)(&ac_index));

        if (rtw_is_list_empty(&ptxservq->tx_pending))
                rtw_list_insert_tail(&ptxservq->tx_pending, get_list_head(phwxmits[ac_index].sta_queue));

        rtw_list_insert_tail(&pxmitframe->list, get_list_head(&ptxservq->sta_pending));
        ptxservq->qcnt++;
        phwxmits[ac_index].accnt++;
exit:

_func_exit_;

        return res;
}

void rtw_alloc_hwxmits(struct adapter *padapter)
{
        struct hw_xmit *hwxmits;
        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;

        pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;

        pxmitpriv->hwxmits = (struct hw_xmit *)rtw_zmalloc(sizeof(struct hw_xmit) * pxmitpriv->hwxmit_entry);

        hwxmits = pxmitpriv->hwxmits;

        if (pxmitpriv->hwxmit_entry == 5) {
                hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
                hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
                hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
                hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
                hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
        } else if (pxmitpriv->hwxmit_entry == 4) {
                hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
                hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
                hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
                hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
        } else {
        }
}

void rtw_free_hwxmits(struct adapter *padapter)
{
        struct hw_xmit *hwxmits;
        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;

        hwxmits = pxmitpriv->hwxmits;
        kfree(hwxmits);
}

void rtw_init_hwxmits(struct hw_xmit *phwxmit, int entry)
{
        int i;
_func_enter_;
        for (i = 0; i < entry; i++, phwxmit++)
                phwxmit->accnt = 0;
_func_exit_;
}

static int rtw_br_client_tx(struct adapter *padapter, struct sk_buff **pskb)
{
        struct sk_buff *skb = *pskb;
        unsigned long irql;
        int res, is_vlan_tag = 0, i, do_nat25 = 1;
        unsigned short vlan_hdr = 0;
        void *br_port = NULL;

        rcu_read_lock();
        br_port = rcu_dereference(padapter->pnetdev->rx_handler_data);
        rcu_read_unlock();
        _enter_critical_bh(&padapter->br_ext_lock, &irql);
        if (!(skb->data[0] & 1) && br_port &&
            memcmp(skb->data+MACADDRLEN, padapter->br_mac, MACADDRLEN) &&
            *((__be16 *)(skb->data+MACADDRLEN*2)) != __constant_htons(ETH_P_8021Q) &&
            *((__be16 *)(skb->data+MACADDRLEN*2)) == __constant_htons(ETH_P_IP) &&
            !memcmp(padapter->scdb_mac, skb->data+MACADDRLEN, MACADDRLEN) && padapter->scdb_entry) {
                memcpy(skb->data+MACADDRLEN, GET_MY_HWADDR(padapter), MACADDRLEN);
                padapter->scdb_entry->ageing_timer = jiffies;
                _exit_critical_bh(&padapter->br_ext_lock, &irql);
        } else {
                if (*((__be16 *)(skb->data+MACADDRLEN*2)) == __constant_htons(ETH_P_8021Q)) {
                        is_vlan_tag = 1;
                        vlan_hdr = *((unsigned short *)(skb->data+MACADDRLEN*2+2));
                        for (i = 0; i < 6; i++)
                                *((unsigned short *)(skb->data+MACADDRLEN*2+2-i*2)) = *((unsigned short *)(skb->data+MACADDRLEN*2-2-i*2));
                        skb_pull(skb, 4);
                }
                if (!memcmp(skb->data+MACADDRLEN, padapter->br_mac, MACADDRLEN) &&
                    (*((__be16 *)(skb->data+MACADDRLEN*2)) == __constant_htons(ETH_P_IP)))
                        memcpy(padapter->br_ip, skb->data+WLAN_ETHHDR_LEN+12, 4);

                if (*((__be16 *)(skb->data+MACADDRLEN*2)) == __constant_htons(ETH_P_IP)) {
                        if (memcmp(padapter->scdb_mac, skb->data+MACADDRLEN, MACADDRLEN)) {
                                padapter->scdb_entry = (struct nat25_network_db_entry *)scdb_findEntry(padapter,
                                                        skb->data+MACADDRLEN, skb->data+WLAN_ETHHDR_LEN+12);
                                if (padapter->scdb_entry) {
                                        memcpy(padapter->scdb_mac, skb->data+MACADDRLEN, MACADDRLEN);
                                        memcpy(padapter->scdb_ip, skb->data+WLAN_ETHHDR_LEN+12, 4);
                                        padapter->scdb_entry->ageing_timer = jiffies;
                                        do_nat25 = 0;
                                }
                        } else {
                                if (padapter->scdb_entry) {
                                        padapter->scdb_entry->ageing_timer = jiffies;
                                        do_nat25 = 0;
                                } else {
                                        memset(padapter->scdb_mac, 0, MACADDRLEN);
                                        memset(padapter->scdb_ip, 0, 4);
                                }
                        }
                }
                _exit_critical_bh(&padapter->br_ext_lock, &irql);
                if (do_nat25) {
                        if (nat25_db_handle(padapter, skb, NAT25_CHECK) == 0) {
                                struct sk_buff *newskb;

                                if (is_vlan_tag) {
                                        skb_push(skb, 4);
                                        for (i = 0; i < 6; i++)
                                                *((unsigned short *)(skb->data+i*2)) = *((unsigned short *)(skb->data+4+i*2));
                                        *((__be16 *)(skb->data+MACADDRLEN*2)) = __constant_htons(ETH_P_8021Q);
                                        *((unsigned short *)(skb->data+MACADDRLEN*2+2)) = vlan_hdr;
                                }

                                newskb = skb_copy(skb, GFP_ATOMIC);
                                if (newskb == NULL) {
                                        DEBUG_ERR("TX DROP: skb_copy fail!\n");
                                        return -1;
                                }
                                dev_kfree_skb_any(skb);

                                *pskb = skb = newskb;
                                if (is_vlan_tag) {
                                        vlan_hdr = *((unsigned short *)(skb->data+MACADDRLEN*2+2));
                                        for (i = 0; i < 6; i++)
                                                *((unsigned short *)(skb->data+MACADDRLEN*2+2-i*2)) = *((unsigned short *)(skb->data+MACADDRLEN*2-2-i*2));
                                        skb_pull(skb, 4);
                                }
                        }

                        if (skb_is_nonlinear(skb))
                                DEBUG_ERR("%s(): skb_is_nonlinear!!\n", __func__);

                        res = skb_linearize(skb);
                        if (res < 0) {
                                        DEBUG_ERR("TX DROP: skb_linearize fail!\n");
                                        return -1;
                        }

                        res = nat25_db_handle(padapter, skb, NAT25_INSERT);
                        if (res < 0) {
                                if (res == -2) {
                                        DEBUG_ERR("TX DROP: nat25_db_handle fail!\n");
                                        return -1;
                                }
                                return 0;
                        }
                }

                memcpy(skb->data+MACADDRLEN, GET_MY_HWADDR(padapter), MACADDRLEN);

                dhcp_flag_bcast(padapter, skb);

                if (is_vlan_tag) {
                        skb_push(skb, 4);
                        for (i = 0; i < 6; i++)
                                *((unsigned short *)(skb->data+i*2)) = *((unsigned short *)(skb->data+4+i*2));
                        *((__be16 *)(skb->data+MACADDRLEN*2)) = __constant_htons(ETH_P_8021Q);
                        *((unsigned short *)(skb->data+MACADDRLEN*2+2)) = vlan_hdr;
                }
        }

        /*  check if SA is equal to our MAC */
        if (memcmp(skb->data+MACADDRLEN, GET_MY_HWADDR(padapter), MACADDRLEN)) {
                DEBUG_ERR("TX DROP: untransformed frame SA:%02X%02X%02X%02X%02X%02X!\n",
                          skb->data[6], skb->data[7], skb->data[8], skb->data[9], skb->data[10], skb->data[11]);
                        return -1;
        }
        return 0;
}

u32 rtw_get_ff_hwaddr(struct xmit_frame *pxmitframe)
{
        u32 addr;
        struct pkt_attrib *pattrib = &pxmitframe->attrib;

        switch (pattrib->qsel) {
        case 0:
        case 3:
                addr = BE_QUEUE_INX;
                break;
        case 1:
        case 2:
                addr = BK_QUEUE_INX;
                break;
        case 4:
        case 5:
                addr = VI_QUEUE_INX;
                break;
        case 6:
        case 7:
                addr = VO_QUEUE_INX;
                break;
        case 0x10:
                addr = BCN_QUEUE_INX;
                break;
        case 0x11:/* BC/MC in PS (HIQ) */
                addr = HIGH_QUEUE_INX;
                break;
        case 0x12:
        default:
                addr = MGT_QUEUE_INX;
                break;
        }

        return addr;
}

static void do_queue_select(struct adapter      *padapter, struct pkt_attrib *pattrib)
{
        u8 qsel;

        qsel = pattrib->priority;
        RT_TRACE(_module_rtl871x_xmit_c_, _drv_info_, ("### do_queue_select priority=%d , qsel = %d\n", pattrib->priority , qsel));

        pattrib->qsel = qsel;
}

/*
 * The main transmit(tx) entry
 *
 * Return
 *      1       enqueue
 *      0       success, hardware will handle this xmit frame(packet)
 *      <0      fail
 */
s32 rtw_xmit(struct adapter *padapter, struct sk_buff **ppkt)
{
#ifdef CONFIG_88EU_AP_MODE
        unsigned long irql0;
#endif
        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
        struct xmit_frame *pxmitframe = NULL;
        struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
        void *br_port = NULL;
        s32 res;

        pxmitframe = rtw_alloc_xmitframe(pxmitpriv);
        if (pxmitframe == NULL) {
                RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit: no more pxmitframe\n"));
                DBG_88E("DBG_TX_DROP_FRAME %s no more pxmitframe\n", __func__);
                return -1;
        }

        rcu_read_lock();
        br_port = rcu_dereference(padapter->pnetdev->rx_handler_data);
        rcu_read_unlock();

        if (br_port && check_fwstate(pmlmepriv, WIFI_STATION_STATE|WIFI_ADHOC_STATE)) {
                res = rtw_br_client_tx(padapter, ppkt);
                if (res == -1) {
                        rtw_free_xmitframe(pxmitpriv, pxmitframe);
                        return -1;
                }
        }

        res = update_attrib(padapter, *ppkt, &pxmitframe->attrib);

        if (res == _FAIL) {
                RT_TRACE(_module_xmit_osdep_c_, _drv_err_, ("rtw_xmit: update attrib fail\n"));
                rtw_free_xmitframe(pxmitpriv, pxmitframe);
                return -1;
        }
        pxmitframe->pkt = *ppkt;

        rtw_led_control(padapter, LED_CTL_TX);

        do_queue_select(padapter, &pxmitframe->attrib);

#ifdef CONFIG_88EU_AP_MODE
        _enter_critical_bh(&pxmitpriv->lock, &irql0);
        if (xmitframe_enqueue_for_sleeping_sta(padapter, pxmitframe)) {
                _exit_critical_bh(&pxmitpriv->lock, &irql0);
                return 1;
        }
        _exit_critical_bh(&pxmitpriv->lock, &irql0);
#endif

        if (rtw_hal_xmit(padapter, pxmitframe) == false)
                return 1;

        return 0;
}

#if defined(CONFIG_88EU_AP_MODE)

int xmitframe_enqueue_for_sleeping_sta(struct adapter *padapter, struct xmit_frame *pxmitframe)
{
        unsigned long irql;
        int ret = false;
        struct sta_info *psta = NULL;

        struct sta_priv *pstapriv = &padapter->stapriv;
        struct pkt_attrib *pattrib = &pxmitframe->attrib;
        struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
        int bmcst = IS_MCAST(pattrib->ra);

        if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == false)
            return ret;

        if (pattrib->psta)
                psta = pattrib->psta;
        else
                psta = rtw_get_stainfo(pstapriv, pattrib->ra);

        if (psta == NULL)
                return ret;

        if (pattrib->triggered == 1) {
                if (bmcst)
                        pattrib->qsel = 0x11;/* HIQ */
                return ret;
        }

        if (bmcst) {
                _enter_critical_bh(&psta->sleep_q.lock, &irql);

                if (pstapriv->sta_dz_bitmap) {/* if any one sta is in ps mode */
                        rtw_list_delete(&pxmitframe->list);

                        rtw_list_insert_tail(&pxmitframe->list, get_list_head(&psta->sleep_q));

                        psta->sleepq_len++;

                        pstapriv->tim_bitmap |= BIT(0);/*  */
                        pstapriv->sta_dz_bitmap |= BIT(0);

                        update_beacon(padapter, _TIM_IE_, NULL, false);/* tx bc/mc packets after upate bcn */

                        ret = true;
                }

                _exit_critical_bh(&psta->sleep_q.lock, &irql);

                return ret;
        }

        _enter_critical_bh(&psta->sleep_q.lock, &irql);

        if (psta->state&WIFI_SLEEP_STATE) {
                u8 wmmps_ac = 0;

                if (pstapriv->sta_dz_bitmap&BIT(psta->aid)) {
                        rtw_list_delete(&pxmitframe->list);

                        rtw_list_insert_tail(&pxmitframe->list, get_list_head(&psta->sleep_q));

                        psta->sleepq_len++;

                        switch (pattrib->priority) {
                        case 1:
                        case 2:
                                wmmps_ac = psta->uapsd_bk&BIT(0);
                                break;
                        case 4:
                        case 5:
                                wmmps_ac = psta->uapsd_vi&BIT(0);
                                break;
                        case 6:
                        case 7:
                                wmmps_ac = psta->uapsd_vo&BIT(0);
                                break;
                        case 0:
                        case 3:
                        default:
                                wmmps_ac = psta->uapsd_be&BIT(0);
                                break;
                        }

                        if (wmmps_ac)
                                psta->sleepq_ac_len++;

                        if (((psta->has_legacy_ac) && (!wmmps_ac)) ||
                            ((!psta->has_legacy_ac) && (wmmps_ac))) {
                                pstapriv->tim_bitmap |= BIT(psta->aid);

                                if (psta->sleepq_len == 1) {
                                        /* upate BCN for TIM IE */
                                        update_beacon(padapter, _TIM_IE_, NULL, false);
                                }
                        }
                        ret = true;
                }
        }

        _exit_critical_bh(&psta->sleep_q.lock, &irql);

        return ret;
}

static void dequeue_xmitframes_to_sleeping_queue(struct adapter *padapter, struct sta_info *psta, struct __queue *pframequeue)
{
        struct list_head *plist, *phead;
        u8      ac_index;
        struct tx_servq *ptxservq;
        struct pkt_attrib       *pattrib;
        struct xmit_frame       *pxmitframe;
        struct hw_xmit *phwxmits =  padapter->xmitpriv.hwxmits;

        phead = get_list_head(pframequeue);
        plist = get_next(phead);

        while (!rtw_end_of_queue_search(phead, plist)) {
                pxmitframe = LIST_CONTAINOR(plist, struct xmit_frame, list);

                plist = get_next(plist);

                xmitframe_enqueue_for_sleeping_sta(padapter, pxmitframe);

                pattrib = &pxmitframe->attrib;

                ptxservq = rtw_get_sta_pending(padapter, psta, pattrib->priority, (u8 *)(&ac_index));

                ptxservq->qcnt--;
                phwxmits[ac_index].accnt--;
        }
}

void stop_sta_xmit(struct adapter *padapter, struct sta_info *psta)
{
        unsigned long irql0;
        struct sta_info *psta_bmc;
        struct sta_xmit_priv *pstaxmitpriv;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;

        pstaxmitpriv = &psta->sta_xmitpriv;

        /* for BC/MC Frames */
        psta_bmc = rtw_get_bcmc_stainfo(padapter);

        _enter_critical_bh(&pxmitpriv->lock, &irql0);

        psta->state |= WIFI_SLEEP_STATE;

        pstapriv->sta_dz_bitmap |= BIT(psta->aid);

        dequeue_xmitframes_to_sleeping_queue(padapter, psta, &pstaxmitpriv->vo_q.sta_pending);
        rtw_list_delete(&(pstaxmitpriv->vo_q.tx_pending));

        dequeue_xmitframes_to_sleeping_queue(padapter, psta, &pstaxmitpriv->vi_q.sta_pending);
        rtw_list_delete(&(pstaxmitpriv->vi_q.tx_pending));

        dequeue_xmitframes_to_sleeping_queue(padapter, psta, &pstaxmitpriv->be_q.sta_pending);
        rtw_list_delete(&(pstaxmitpriv->be_q.tx_pending));

        dequeue_xmitframes_to_sleeping_queue(padapter, psta, &pstaxmitpriv->bk_q.sta_pending);
        rtw_list_delete(&(pstaxmitpriv->bk_q.tx_pending));

        /* for BC/MC Frames */
        pstaxmitpriv = &psta_bmc->sta_xmitpriv;
        dequeue_xmitframes_to_sleeping_queue(padapter, psta_bmc, &pstaxmitpriv->be_q.sta_pending);
        rtw_list_delete(&(pstaxmitpriv->be_q.tx_pending));

        _exit_critical_bh(&pxmitpriv->lock, &irql0);
}

void wakeup_sta_to_xmit(struct adapter *padapter, struct sta_info *psta)
{
        unsigned long irql;
        u8 update_mask = 0, wmmps_ac = 0;
        struct sta_info *psta_bmc;
        struct list_head *xmitframe_plist, *xmitframe_phead;
        struct xmit_frame *pxmitframe = NULL;
        struct sta_priv *pstapriv = &padapter->stapriv;

        _enter_critical_bh(&psta->sleep_q.lock, &irql);

        xmitframe_phead = get_list_head(&psta->sleep_q);
        xmitframe_plist = get_next(xmitframe_phead);

        while (!rtw_end_of_queue_search(xmitframe_phead, xmitframe_plist)) {
                pxmitframe = LIST_CONTAINOR(xmitframe_plist, struct xmit_frame, list);

                xmitframe_plist = get_next(xmitframe_plist);

                rtw_list_delete(&pxmitframe->list);

                switch (pxmitframe->attrib.priority) {
                case 1:
                case 2:
                        wmmps_ac = psta->uapsd_bk&BIT(1);
                        break;
                case 4:
                case 5:
                        wmmps_ac = psta->uapsd_vi&BIT(1);
                        break;
                case 6:
                case 7:
                        wmmps_ac = psta->uapsd_vo&BIT(1);
                        break;
                case 0:
                case 3:
                default:
                        wmmps_ac = psta->uapsd_be&BIT(1);
                        break;
                }

                psta->sleepq_len--;
                if (psta->sleepq_len > 0)
                        pxmitframe->attrib.mdata = 1;
                else
                        pxmitframe->attrib.mdata = 0;

                if (wmmps_ac) {
                        psta->sleepq_ac_len--;
                        if (psta->sleepq_ac_len > 0) {
                                pxmitframe->attrib.mdata = 1;
                                pxmitframe->attrib.eosp = 0;
                        } else {
                                pxmitframe->attrib.mdata = 0;
                                pxmitframe->attrib.eosp = 1;
                        }
                }

                pxmitframe->attrib.triggered = 1;

                _exit_critical_bh(&psta->sleep_q.lock, &irql);
                if (rtw_hal_xmit(padapter, pxmitframe))
                        rtw_os_xmit_complete(padapter, pxmitframe);
                _enter_critical_bh(&psta->sleep_q.lock, &irql);
        }

        if (psta->sleepq_len == 0) {
                pstapriv->tim_bitmap &= ~BIT(psta->aid);

                update_mask = BIT(0);

                if (psta->state&WIFI_SLEEP_STATE)
                        psta->state ^= WIFI_SLEEP_STATE;

                if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
                        psta->expire_to = pstapriv->expire_to;
                        psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
                }

                pstapriv->sta_dz_bitmap &= ~BIT(psta->aid);
        }

        _exit_critical_bh(&psta->sleep_q.lock, &irql);

        /* for BC/MC Frames */
        psta_bmc = rtw_get_bcmc_stainfo(padapter);
        if (!psta_bmc)
                return;

        if ((pstapriv->sta_dz_bitmap&0xfffe) == 0x0) { /* no any sta in ps mode */
                _enter_critical_bh(&psta_bmc->sleep_q.lock, &irql);

                xmitframe_phead = get_list_head(&psta_bmc->sleep_q);
                xmitframe_plist = get_next(xmitframe_phead);

                while (!rtw_end_of_queue_search(xmitframe_phead, xmitframe_plist)) {
                        pxmitframe = LIST_CONTAINOR(xmitframe_plist, struct xmit_frame, list);

                        xmitframe_plist = get_next(xmitframe_plist);

                        rtw_list_delete(&pxmitframe->list);

                        psta_bmc->sleepq_len--;
                        if (psta_bmc->sleepq_len > 0)
                                pxmitframe->attrib.mdata = 1;
                        else
                                pxmitframe->attrib.mdata = 0;

                        pxmitframe->attrib.triggered = 1;

                        _exit_critical_bh(&psta_bmc->sleep_q.lock, &irql);
                        if (rtw_hal_xmit(padapter, pxmitframe))
                                rtw_os_xmit_complete(padapter, pxmitframe);
                        _enter_critical_bh(&psta_bmc->sleep_q.lock, &irql);
                }

                if (psta_bmc->sleepq_len == 0) {
                        pstapriv->tim_bitmap &= ~BIT(0);
                        pstapriv->sta_dz_bitmap &= ~BIT(0);

                        update_mask |= BIT(1);
                }

                _exit_critical_bh(&psta_bmc->sleep_q.lock, &irql);
        }

        if (update_mask)
                update_beacon(padapter, _TIM_IE_, NULL, false);
}

void xmit_delivery_enabled_frames(struct adapter *padapter, struct sta_info *psta)
{
        unsigned long irql;
        u8 wmmps_ac = 0;
        struct list_head *xmitframe_plist, *xmitframe_phead;
        struct xmit_frame *pxmitframe = NULL;
        struct sta_priv *pstapriv = &padapter->stapriv;

        _enter_critical_bh(&psta->sleep_q.lock, &irql);

        xmitframe_phead = get_list_head(&psta->sleep_q);
        xmitframe_plist = get_next(xmitframe_phead);

        while (!rtw_end_of_queue_search(xmitframe_phead, xmitframe_plist)) {
                pxmitframe = LIST_CONTAINOR(xmitframe_plist, struct xmit_frame, list);

                xmitframe_plist = get_next(xmitframe_plist);

                switch (pxmitframe->attrib.priority) {
                case 1:
                case 2:
                        wmmps_ac = psta->uapsd_bk&BIT(1);
                        break;
                case 4:
                case 5:
                        wmmps_ac = psta->uapsd_vi&BIT(1);
                        break;
                case 6:
                case 7:
                        wmmps_ac = psta->uapsd_vo&BIT(1);
                        break;
                case 0:
                case 3:
                default:
                        wmmps_ac = psta->uapsd_be&BIT(1);
                        break;
                }

                if (!wmmps_ac)
                        continue;

                rtw_list_delete(&pxmitframe->list);

                psta->sleepq_len--;
                psta->sleepq_ac_len--;

                if (psta->sleepq_ac_len > 0) {
                        pxmitframe->attrib.mdata = 1;
                        pxmitframe->attrib.eosp = 0;
                } else {
                        pxmitframe->attrib.mdata = 0;
                        pxmitframe->attrib.eosp = 1;
                }

                pxmitframe->attrib.triggered = 1;

                if (rtw_hal_xmit(padapter, pxmitframe) == true)
                        rtw_os_xmit_complete(padapter, pxmitframe);

                if ((psta->sleepq_ac_len == 0) && (!psta->has_legacy_ac) && (wmmps_ac)) {
                        pstapriv->tim_bitmap &= ~BIT(psta->aid);

                        /* upate BCN for TIM IE */
                        update_beacon(padapter, _TIM_IE_, NULL, false);
                }
        }

        _exit_critical_bh(&psta->sleep_q.lock, &irql);
}

#endif

void rtw_sctx_init(struct submit_ctx *sctx, int timeout_ms)
{
        sctx->timeout_ms = timeout_ms;
        sctx->submit_time = rtw_get_current_time();
        init_completion(&sctx->done);
        sctx->status = RTW_SCTX_SUBMITTED;
}

int rtw_sctx_wait(struct submit_ctx *sctx)
{
        int ret = _FAIL;
        unsigned long expire;
        int status = 0;

        expire = sctx->timeout_ms ? msecs_to_jiffies(sctx->timeout_ms) : MAX_SCHEDULE_TIMEOUT;
        if (!wait_for_completion_timeout(&sctx->done, expire)) {
                /* timeout, do something?? */
                status = RTW_SCTX_DONE_TIMEOUT;
                DBG_88E("%s timeout\n", __func__);
        } else {
                status = sctx->status;
        }

        if (status == RTW_SCTX_DONE_SUCCESS)
                ret = _SUCCESS;

        return ret;
}

static bool rtw_sctx_chk_waring_status(int status)
{
        switch (status) {
        case RTW_SCTX_DONE_UNKNOWN:
        case RTW_SCTX_DONE_BUF_ALLOC:
        case RTW_SCTX_DONE_BUF_FREE:

        case RTW_SCTX_DONE_DRV_STOP:
        case RTW_SCTX_DONE_DEV_REMOVE:
                return true;
        default:
                return false;
        }
}

void rtw_sctx_done_err(struct submit_ctx **sctx, int status)
{
        if (*sctx) {
                if (rtw_sctx_chk_waring_status(status))
                        DBG_88E("%s status:%d\n", __func__, status);
                (*sctx)->status = status;
                complete(&((*sctx)->done));
                *sctx = NULL;
        }
}

void rtw_sctx_done(struct submit_ctx **sctx)
{
        rtw_sctx_done_err(sctx, RTW_SCTX_DONE_SUCCESS);
}

int rtw_ack_tx_wait(struct xmit_priv *pxmitpriv, u32 timeout_ms)
{
        struct submit_ctx *pack_tx_ops = &pxmitpriv->ack_tx_ops;

        pack_tx_ops->submit_time = rtw_get_current_time();
        pack_tx_ops->timeout_ms = timeout_ms;
        pack_tx_ops->status = RTW_SCTX_SUBMITTED;

        return rtw_sctx_wait(pack_tx_ops);
}

void rtw_ack_tx_done(struct xmit_priv *pxmitpriv, int status)
{
        struct submit_ctx *pack_tx_ops = &pxmitpriv->ack_tx_ops;

        if (pxmitpriv->ack_tx)
                rtw_sctx_done_err(&pack_tx_ops, status);
        else
                DBG_88E("%s ack_tx not set\n", __func__);
}