/******************************************************************************
 * rtl8712_xmit.c
 *
 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
 * Linux device driver for RTL8192SU
 *
 * 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
 *
 * Modifications for inclusion into the Linux staging tree are
 * Copyright(c) 2010 Larry Finger. All rights reserved.
 *
 * Contact information:
 * WLAN FAE <wlanfae@realtek.com>
 * Larry Finger <Larry.Finger@lwfinger.net>
 *
 ******************************************************************************/

#define _RTL8712_XMIT_C_

#include "osdep_service.h"
#include "drv_types.h"
#include "wifi.h"
#include "osdep_intf.h"
#include "usb_ops.h"

static void dump_xframe(struct _adapter *padapter,
                        struct xmit_frame *pxmitframe);
static void update_txdesc(struct xmit_frame *pxmitframe, uint *pmem, int sz);

sint _r8712_init_hw_txqueue(struct hw_txqueue *phw_txqueue, u8 ac_tag)
{
        phw_txqueue->ac_tag = ac_tag;
        switch (ac_tag) {
        case BE_QUEUE_INX:
                phw_txqueue->ff_hwaddr = RTL8712_DMA_BEQ;
                break;
        case BK_QUEUE_INX:
                phw_txqueue->ff_hwaddr = RTL8712_DMA_BKQ;
                break;
        case VI_QUEUE_INX:
                phw_txqueue->ff_hwaddr = RTL8712_DMA_VIQ;
                break;
        case VO_QUEUE_INX:
                phw_txqueue->ff_hwaddr = RTL8712_DMA_VOQ;
                break;
        case BMC_QUEUE_INX:
                phw_txqueue->ff_hwaddr = RTL8712_DMA_BEQ;
                break;
        }
        return _SUCCESS;
}

int r8712_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;
}

static u32 get_ff_hwaddr(struct xmit_frame *pxmitframe)
{
        u32 addr = 0;
        struct pkt_attrib *pattrib = &pxmitframe->attrib;
        struct _adapter *padapter = pxmitframe->padapter;
        struct dvobj_priv *pdvobj = &padapter->dvobjpriv;

        if (pxmitframe->frame_tag == TXAGG_FRAMETAG) {
                addr = RTL8712_DMA_H2CCMD;
        } else if (pxmitframe->frame_tag == MGNT_FRAMETAG) {
                addr = RTL8712_DMA_MGTQ;
        } else if (pdvobj->nr_endpoint == 6) {
                switch (pattrib->priority) {
                case 0:
                case 3:
                        addr = RTL8712_DMA_BEQ;
                        break;
                case 1:
                case 2:
                        addr = RTL8712_DMA_BKQ;
                        break;
                case 4:
                case 5:
                        addr = RTL8712_DMA_VIQ;
                        break;
                case 6:
                case 7:
                        addr = RTL8712_DMA_VOQ;
                        break;
                case 0x10:
                case 0x11:
                case 0x12:
                case 0x13:
                        addr = RTL8712_DMA_H2CCMD;
                        break;
                default:
                        addr = RTL8712_DMA_BEQ;
                        break;
                }
        } else if (pdvobj->nr_endpoint == 4) {
                switch (pattrib->qsel) {
                case 0:
                case 3:
                case 1:
                case 2:
                        addr = RTL8712_DMA_BEQ;/*RTL8712_EP_LO;*/
                        break;
                case 4:
                case 5:
                case 6:
                case 7:
                        addr = RTL8712_DMA_VOQ;/*RTL8712_EP_HI;*/
                        break;
                case 0x10:
                case 0x11:
                case 0x12:
                case 0x13:
                        addr = RTL8712_DMA_H2CCMD;
                        break;
                default:
                        addr = RTL8712_DMA_BEQ;/*RTL8712_EP_LO;*/
                        break;
                }
        }
        return addr;
}

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 = &pframe_queue->queue;
        xmitframe_plist = xmitframe_phead->next;
        if (!end_of_queue_search(xmitframe_phead, xmitframe_plist)) {
                pxmitframe = container_of(xmitframe_plist,
                                          struct xmit_frame, list);
                list_del_init(&pxmitframe->list);
                ptxservq->qcnt--;
                phwxmit->txcmdcnt++;
        }
        return pxmitframe;
}

static struct xmit_frame *dequeue_xframe_ex(struct xmit_priv *pxmitpriv,
                                     struct hw_xmit *phwxmit_i, sint 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;
        int i, inx[4];
        int j, acirp_cnt[4];

        /*entry indx: 0->vo, 1->vi, 2->be, 3->bk.*/
        inx[0] = 0; acirp_cnt[0] = pxmitpriv->voq_cnt;
        inx[1] = 1; acirp_cnt[1] = pxmitpriv->viq_cnt;
        inx[2] = 2; acirp_cnt[2] = pxmitpriv->beq_cnt;
        inx[3] = 3; acirp_cnt[3] = pxmitpriv->bkq_cnt;
        for (i = 0; i < 4; i++) {
                for (j = i + 1; j < 4; j++) {
                        if (acirp_cnt[j] < acirp_cnt[i]) {
                                swap(acirp_cnt[i], acirp_cnt[j]);
                                swap(inx[i], inx[j]);
                        }
                }
        }
        spin_lock_irqsave(&pxmitpriv->lock, irqL0);
        for (i = 0; i < entry; i++) {
                phwxmit = phwxmit_i + inx[i];
                sta_phead = &phwxmit->sta_queue->queue;
                sta_plist = sta_phead->next;
                while (!end_of_queue_search(sta_phead, sta_plist)) {
                        ptxservq = container_of(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--;
                                goto exit_dequeue_xframe_ex;
                        }
                        sta_plist = sta_plist->next;
                        /*Remove sta node when there are no pending packets.*/
                        if (list_empty(&pframe_queue->queue)) {
                                /* must be done after sta_plist->next
                                 * and before break
                                 */
                                list_del_init(&ptxservq->tx_pending);
                        }
                }
        }
exit_dequeue_xframe_ex:
        spin_unlock_irqrestore(&pxmitpriv->lock, irqL0);
        return pxmitframe;
}

void r8712_do_queue_select(struct _adapter *padapter,
                           struct pkt_attrib *pattrib)
{
        unsigned int qsel = 0;
        struct dvobj_priv *pdvobj = &padapter->dvobjpriv;

        if (pdvobj->nr_endpoint == 6) {
                qsel = (unsigned int) pattrib->priority;
        } else if (pdvobj->nr_endpoint == 4) {
                qsel = (unsigned int) pattrib->priority;
                if (qsel == 0 || qsel == 3)
                        qsel = 3;
                else if (qsel == 1 || qsel == 2)
                        qsel = 1;
                else if (qsel == 4 || qsel == 5)
                        qsel = 5;
                else if (qsel == 6 || qsel == 7)
                        qsel = 7;
                else
                        qsel = 3;
        }
        pattrib->qsel = qsel;
}

#ifdef CONFIG_R8712_TX_AGGR
u8 r8712_construct_txaggr_cmd_desc(struct xmit_buf *pxmitbuf)
{
        struct tx_desc *ptx_desc = (struct tx_desc *)pxmitbuf->pbuf;

        /* Fill up TxCmd Descriptor according as USB FW Tx Aaggregation info.*/
        /* dw0 */
        ptx_desc->txdw0 = cpu_to_le32(CMD_HDR_SZ & 0xffff);
        ptx_desc->txdw0 |=
                cpu_to_le32(((TXDESC_SIZE + OFFSET_SZ) << OFFSET_SHT) &
                            0x00ff0000);
        ptx_desc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);

        /* dw1 */
        ptx_desc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) & 0x00001f00);

        return _SUCCESS;
}

u8 r8712_construct_txaggr_cmd_hdr(struct xmit_buf *pxmitbuf)
{
        struct xmit_frame *pxmitframe = (struct xmit_frame *)
                pxmitbuf->priv_data;
        struct _adapter *padapter = pxmitframe->padapter;
        struct cmd_priv *pcmdpriv = &(padapter->cmdpriv);
        struct cmd_hdr *pcmd_hdr = (struct cmd_hdr  *)
                (pxmitbuf->pbuf + TXDESC_SIZE);

        /* Fill up Cmd Header for USB FW Tx Aggregation.*/
        /* dw0 */
        pcmd_hdr->cmd_dw0 = cpu_to_le32((GEN_CMD_CODE(_AMSDU_TO_AMPDU) << 16) |
                                        (pcmdpriv->cmd_seq << 24));
        pcmdpriv->cmd_seq++;

        return _SUCCESS;
}

u8 r8712_append_mpdu_unit(struct xmit_buf *pxmitbuf,
                        struct xmit_frame *pxmitframe)
{
        struct _adapter *padapter = pxmitframe->padapter;
        struct tx_desc *ptx_desc = (struct tx_desc *)pxmitbuf->pbuf;
        int last_txcmdsz = 0;
        int padding_sz = 0;

        /* 802.3->802.11 converter */
        r8712_xmitframe_coalesce(padapter, pxmitframe->pkt, pxmitframe);
        /* free skb struct */
        r8712_xmit_complete(padapter, pxmitframe);
        if (pxmitframe->attrib.ether_type != 0x0806) {
                if ((pxmitframe->attrib.ether_type != 0x888e) &&
                        (pxmitframe->attrib.dhcp_pkt != 1)) {
                        r8712_issue_addbareq_cmd(padapter,
                                        pxmitframe->attrib.priority);
                }
        }
        pxmitframe->last[0] = 1;
        update_txdesc(pxmitframe, (uint *)(pxmitframe->buf_addr),
                pxmitframe->attrib.last_txcmdsz);
        /*padding zero */
        last_txcmdsz = pxmitframe->attrib.last_txcmdsz;
        padding_sz = (8 - (last_txcmdsz % 8));
        if ((last_txcmdsz % 8) != 0) {
                int i;

                for (i = 0; i < padding_sz; i++)
                        *(pxmitframe->buf_addr + TXDESC_SIZE + last_txcmdsz +
                          i) = 0;
        }
        /* Add the new mpdu's length */
        ptx_desc->txdw0 = cpu_to_le32((ptx_desc->txdw0 & 0xffff0000) |
                ((ptx_desc->txdw0 & 0x0000ffff) +
                        ((TXDESC_SIZE + last_txcmdsz + padding_sz) &
                         0x0000ffff)));

        return _SUCCESS;
}


u8 r8712_xmitframe_aggr_1st(struct xmit_buf *pxmitbuf,
                        struct xmit_frame *pxmitframe)
{
        /* linux complete context doesn't need to protect */
        pxmitframe->pxmitbuf = pxmitbuf;
        pxmitbuf->priv_data = pxmitframe;
        pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
        /* buffer addr assoc */
        pxmitframe->buf_addr = pxmitbuf->pbuf + TXDESC_SIZE + CMD_HDR_SZ;
        /*RTL8712_DMA_H2CCMD */
        r8712_construct_txaggr_cmd_desc(pxmitbuf);
        r8712_construct_txaggr_cmd_hdr(pxmitbuf);
        if (r8712_append_mpdu_unit(pxmitbuf, pxmitframe) == _SUCCESS)
                pxmitbuf->aggr_nr = 1;

        return _SUCCESS;
}

u16 r8712_xmitframe_aggr_next(struct xmit_buf *pxmitbuf,
                        struct xmit_frame *pxmitframe)
{
        pxmitframe->pxmitbuf = pxmitbuf;
        pxmitbuf->priv_data = pxmitframe;
        pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
        /* buffer addr assoc */
        pxmitframe->buf_addr = pxmitbuf->pbuf + TXDESC_SIZE +
                (((struct tx_desc *)pxmitbuf->pbuf)->txdw0 & 0x0000ffff);
        if (r8712_append_mpdu_unit(pxmitbuf, pxmitframe) == _SUCCESS) {
                r8712_free_xmitframe_ex(&pxmitframe->padapter->xmitpriv,
                                        pxmitframe);
                pxmitbuf->aggr_nr++;
        }

        return TXDESC_SIZE +
                (((struct tx_desc *)pxmitbuf->pbuf)->txdw0 & 0x0000ffff);
}

u8 r8712_dump_aggr_xframe(struct xmit_buf *pxmitbuf,
                        struct xmit_frame *pxmitframe)
{
        struct _adapter *padapter = pxmitframe->padapter;
        struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
        struct tx_desc *ptxdesc = pxmitbuf->pbuf;
        struct cmd_hdr *pcmd_hdr = (struct cmd_hdr *)
                (pxmitbuf->pbuf + TXDESC_SIZE);
        u16 total_length = (u16) (ptxdesc->txdw0 & 0xffff);

        /* use 1st xmitframe as media */
        xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
        pcmd_hdr->cmd_dw0 = cpu_to_le32(((total_length - CMD_HDR_SZ) &
                                         0x0000ffff) | (pcmd_hdr->cmd_dw0 &
                                                        0xffff0000));

        /* urb length in cmd_dw1 */
        pcmd_hdr->cmd_dw1 = cpu_to_le32((pxmitbuf->aggr_nr & 0xff)|
                                        ((total_length + TXDESC_SIZE) << 16));
        pxmitframe->last[0] = 1;
        pxmitframe->bpending[0] = false;
        pxmitframe->mem_addr = pxmitbuf->pbuf;

        if ((pdvobj->ishighspeed && ((total_length + TXDESC_SIZE) % 0x200) ==
             0) || ((!pdvobj->ishighspeed && ((total_length + TXDESC_SIZE) %
                                              0x40) == 0))) {
                ptxdesc->txdw0 |= cpu_to_le32
                        (((TXDESC_SIZE + OFFSET_SZ + 8) << OFFSET_SHT) &
                         0x00ff0000);
                /*32 bytes for TX Desc + 8 bytes pending*/
        } else {
                ptxdesc->txdw0 |= cpu_to_le32
                        (((TXDESC_SIZE + OFFSET_SZ) << OFFSET_SHT) &
                         0x00ff0000);
                /*default = 32 bytes for TX Desc*/
        }
        r8712_write_port(pxmitframe->padapter, RTL8712_DMA_H2CCMD,
                        total_length + TXDESC_SIZE, (u8 *)pxmitframe);

        return _SUCCESS;
}

#endif

static void update_txdesc(struct xmit_frame *pxmitframe, uint *pmem, int sz)
{
        uint qsel;
        struct _adapter *padapter = pxmitframe->padapter;
        struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
        struct qos_priv *pqospriv = &pmlmepriv->qospriv;
        struct security_priv *psecuritypriv = &padapter->securitypriv;
        struct pkt_attrib *pattrib = &pxmitframe->attrib;
        struct tx_desc *ptxdesc = (struct tx_desc *)pmem;
        struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
#ifdef CONFIG_R8712_TX_AGGR
        struct cmd_priv *pcmdpriv = &padapter->cmdpriv;
#endif
        u8 blnSetTxDescOffset;
        sint bmcst = IS_MCAST(pattrib->ra);
        struct ht_priv *phtpriv = &pmlmepriv->htpriv;
        struct tx_desc txdesc_mp;

        memcpy(&txdesc_mp, ptxdesc, sizeof(struct tx_desc));
        memset(ptxdesc, 0, sizeof(struct tx_desc));
        /* offset 0 */
        ptxdesc->txdw0 |= cpu_to_le32(sz & 0x0000ffff);
        if (pdvobj->ishighspeed) {
                if (((sz + TXDESC_SIZE) % 512) == 0)
                        blnSetTxDescOffset = 1;
                else
                        blnSetTxDescOffset = 0;
        } else {
                if (((sz + TXDESC_SIZE) % 64) == 0)
                        blnSetTxDescOffset = 1;
                else
                        blnSetTxDescOffset = 0;
        }
        if (blnSetTxDescOffset) {
                /* 32 bytes for TX Desc + 8 bytes pending */
                ptxdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE + OFFSET_SZ + 8) <<
                              OFFSET_SHT) & 0x00ff0000);
        } else {
                /* default = 32 bytes for TX Desc */
                ptxdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE + OFFSET_SZ) <<
                                  OFFSET_SHT) & 0x00ff0000);
        }
        ptxdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
        if (pxmitframe->frame_tag == DATA_FRAMETAG) {
                /* offset 4 */
                ptxdesc->txdw1 |= cpu_to_le32((pattrib->mac_id) & 0x1f);

#ifdef CONFIG_R8712_TX_AGGR
                /* dirty workaround, need to check if it is aggr cmd. */
                if ((u8 *)pmem != (u8 *)pxmitframe->pxmitbuf->pbuf) {
                        ptxdesc->txdw0 |= cpu_to_le32
                                ((0x3 << TYPE_SHT) & TYPE_MSK);
                        qsel = (uint)(pattrib->qsel & 0x0000001f);
                        if (qsel == 2)
                                qsel = 0;
                        ptxdesc->txdw1 |= cpu_to_le32
                                ((qsel << QSEL_SHT) & 0x00001f00);
                        ptxdesc->txdw2 = cpu_to_le32
                                ((qsel << RTS_RC_SHT) & 0x001f0000);
                        ptxdesc->txdw6 |= cpu_to_le32
                                ((0x5 << RSVD6_SHT) & RSVD6_MSK);
                } else {
                        ptxdesc->txdw0 |= cpu_to_le32
                                ((0x3 << TYPE_SHT) & TYPE_MSK);
                        ptxdesc->txdw1 |= cpu_to_le32
                                ((0x13 << QSEL_SHT) & 0x00001f00);
                        qsel = (uint)(pattrib->qsel & 0x0000001f);
                        if (qsel == 2)
                                qsel = 0;
                        ptxdesc->txdw2 = cpu_to_le32
                                ((qsel << RTS_RC_SHT) & 0x0001f000);
                        ptxdesc->txdw7 |= cpu_to_le32
                                (pcmdpriv->cmd_seq << 24);
                        pcmdpriv->cmd_seq++;
                }
                pattrib->qsel = 0x13;
#else
                qsel = (uint)(pattrib->qsel & 0x0000001f);
                ptxdesc->txdw1 |= cpu_to_le32((qsel << QSEL_SHT) & 0x00001f00);
#endif
                if (!pqospriv->qos_option)
                        ptxdesc->txdw1 |= cpu_to_le32(BIT(16));/*Non-QoS*/
                if ((pattrib->encrypt > 0) && !pattrib->bswenc) {
                        switch (pattrib->encrypt) {     /*SEC_TYPE*/
                        case _WEP40_:
                        case _WEP104_:
                                ptxdesc->txdw1 |= cpu_to_le32((0x01 << 22) &
                                                  0x00c00000);
                                /*KEY_ID when WEP is used;*/
                                ptxdesc->txdw1 |= cpu_to_le32((psecuritypriv->
                                                  PrivacyKeyIndex << 17) &
                                                  0x00060000);
                                break;
                        case _TKIP_:
                        case _TKIP_WTMIC_:
                                ptxdesc->txdw1 |= cpu_to_le32((0x02 << 22) &
                                                  0x00c00000);
                                break;
                        case _AES_:
                                ptxdesc->txdw1 |= cpu_to_le32((0x03 << 22) &
                                                  0x00c00000);
                                break;
                        case _NO_PRIVACY_:
                        default:
                                break;
                        }
                }
                /*offset 8*/
                if (bmcst)
                        ptxdesc->txdw2 |= cpu_to_le32(BMC);

                /*offset 12*/
                /* f/w will increase the seqnum by itself, driver pass the
                 * correct priority to fw
                 * fw will check the correct priority for increasing the
                 * seqnum per tid. about usb using 4-endpoint, qsel points out
                 * the correct mapping between AC&Endpoint,
                 * the purpose is that correct mapping lets the MAC release
                 * the AC Queue list correctly.
                 */
                ptxdesc->txdw3 = cpu_to_le32((pattrib->priority << SEQ_SHT) &
                                 0x0fff0000);
                if ((pattrib->ether_type != 0x888e) &&
                    (pattrib->ether_type != 0x0806) &&
                    (pattrib->dhcp_pkt != 1)) {
                        /*Not EAP & ARP type data packet*/
                        if (phtpriv->ht_option == 1) { /*B/G/N Mode*/
                                if (phtpriv->ampdu_enable != true)
                                        ptxdesc->txdw2 |= cpu_to_le32(BK);
                        }
                } else {
                        /* EAP data packet and ARP packet.
                         * Use the 1M data rate to send the EAP/ARP packet.
                         * This will maybe make the handshake smooth.
                         */
                        /*driver uses data rate*/
                        ptxdesc->txdw4 = cpu_to_le32(0x80000000);
                        ptxdesc->txdw5 = cpu_to_le32(0x001f8000);/*1M*/
                }
                if (pattrib->pctrl == 1) { /* mp tx packets */
                        struct tx_desc *ptxdesc_mp;

                        ptxdesc_mp = &txdesc_mp;
                        /* offset 8 */
                        ptxdesc->txdw2 = ptxdesc_mp->txdw2;
                        if (bmcst)
                                ptxdesc->txdw2 |= cpu_to_le32(BMC);
                        ptxdesc->txdw2 |= cpu_to_le32(BK);
                        /* offset 16 */
                        ptxdesc->txdw4 = ptxdesc_mp->txdw4;
                        /* offset 20 */
                        ptxdesc->txdw5 = ptxdesc_mp->txdw5;
                        pattrib->pctrl = 0;/* reset to zero; */
                }
        } else if (pxmitframe->frame_tag == MGNT_FRAMETAG) {
                /* offset 4 */
                ptxdesc->txdw1 |= cpu_to_le32((0x05) & 0x1f);/*CAM_ID(MAC_ID), default=5;*/
                qsel = (uint)(pattrib->qsel & 0x0000001f);
                ptxdesc->txdw1 |= cpu_to_le32((qsel << QSEL_SHT) & 0x00001f00);
                ptxdesc->txdw1 |= cpu_to_le32(BIT(16));/* Non-QoS */
                /* offset 8 */
                if (bmcst)
                        ptxdesc->txdw2 |= cpu_to_le32(BMC);
                /* offset 12 */
                /* f/w will increase the seqnum by itself, driver pass the
                 * correct priority to fw
                 * fw will check the correct priority for increasing the seqnum
                 * per tid. about usb using 4-endpoint, qsel points out the
                 * correct mapping between AC&Endpoint,
                 * the purpose is that correct mapping let the MAC releases
                 * the AC Queue list correctly.
                 */
                ptxdesc->txdw3 = cpu_to_le32((pattrib->priority << SEQ_SHT) &
                                              0x0fff0000);
                /* offset 16 */
                ptxdesc->txdw4 = cpu_to_le32(0x80002040);/*gtest*/
                /* offset 20 */
                ptxdesc->txdw5 = cpu_to_le32(0x001f8000);/* gtest 1M */
        } else if (pxmitframe->frame_tag == TXAGG_FRAMETAG) {
                /* offset 4 */
                qsel = 0x13;
                ptxdesc->txdw1 |= cpu_to_le32((qsel << QSEL_SHT) & 0x00001f00);
        } else {
                /* offset 4 */
                qsel = (uint)(pattrib->priority & 0x0000001f);
                ptxdesc->txdw1 |= cpu_to_le32((qsel << QSEL_SHT) & 0x00001f00);
                /*offset 8*/
                /*offset 12*/
                ptxdesc->txdw3 = cpu_to_le32((pattrib->seqnum << SEQ_SHT) &
                                              0x0fff0000);
                /*offset 16*/
                ptxdesc->txdw4 = cpu_to_le32(0x80002040);/*gtest*/
                /*offset 20*/
                ptxdesc->txdw5 = cpu_to_le32(0x001f9600);/*gtest*/
        }
}

int r8712_xmitframe_complete(struct _adapter *padapter,
                             struct xmit_priv *pxmitpriv,
                             struct xmit_buf *pxmitbuf)
{
        struct hw_xmit *phwxmits;
        sint hwentry;
        struct xmit_frame *pxmitframe = NULL;
#ifdef CONFIG_R8712_TX_AGGR
        struct xmit_frame *p2ndxmitframe = NULL;
#else
        int res = _SUCCESS, xcnt = 0;
#endif

        phwxmits = pxmitpriv->hwxmits;
        hwentry = pxmitpriv->hwxmit_entry;
        if (!pxmitbuf) {
                pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
                if (!pxmitbuf)
                        return false;
#ifdef CONFIG_R8712_TX_AGGR
                pxmitbuf->aggr_nr = 0;
#endif
        }
        /* 1st frame dequeued */
        pxmitframe = dequeue_xframe_ex(pxmitpriv, phwxmits, hwentry);
        /* need to remember the 1st frame */
        if (pxmitframe != NULL) {

#ifdef CONFIG_R8712_TX_AGGR
                /* 1. dequeue 2nd frame
                 * 2. aggr if 2nd xframe is dequeued, else dump directly
                 */
                if (AGGR_NR_HIGH_BOUND > 1)
                        p2ndxmitframe = dequeue_xframe_ex(pxmitpriv, phwxmits,
                                                        hwentry);
                if (pxmitframe->frame_tag != DATA_FRAMETAG) {
                        r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
                        return false;
                }
                if (p2ndxmitframe != NULL)
                        if (p2ndxmitframe->frame_tag != DATA_FRAMETAG) {
                                r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
                                return false;
                        }
                r8712_xmitframe_aggr_1st(pxmitbuf, pxmitframe);
                if (p2ndxmitframe != NULL) {
                        u16 total_length;

                        total_length = r8712_xmitframe_aggr_next(
                                pxmitbuf, p2ndxmitframe);
                        do {
                                p2ndxmitframe = dequeue_xframe_ex(
                                        pxmitpriv, phwxmits, hwentry);
                                if (p2ndxmitframe != NULL)
                                        total_length =
                                                r8712_xmitframe_aggr_next(
                                                        pxmitbuf,
                                                        p2ndxmitframe);
                                else
                                        break;
                        } while (total_length <= 0x1800 &&
                                pxmitbuf->aggr_nr <= AGGR_NR_HIGH_BOUND);
                }
                if (pxmitbuf->aggr_nr > 0)
                        r8712_dump_aggr_xframe(pxmitbuf, pxmitframe);

#else

                xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
                if (pxmitframe->frame_tag == DATA_FRAMETAG) {
                        if (pxmitframe->attrib.priority <= 15)
                                res = r8712_xmitframe_coalesce(padapter,
                                        pxmitframe->pkt, pxmitframe);
                        /* always return ndis_packet after
                         * r8712_xmitframe_coalesce
                         */
                        r8712_xmit_complete(padapter, pxmitframe);
                }
                if (res == _SUCCESS)
                        dump_xframe(padapter, pxmitframe);
                else
                        r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
                xcnt++;
#endif

        } else { /* pxmitframe == NULL && p2ndxmitframe == NULL */
                r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
                return false;
        }
        return true;
}

static void dump_xframe(struct _adapter *padapter,
                        struct xmit_frame *pxmitframe)
{
        int t, sz, w_sz;
        u8 *mem_addr;
        u32 ff_hwaddr;
        struct pkt_attrib *pattrib = &pxmitframe->attrib;
        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
        struct security_priv *psecuritypriv = &padapter->securitypriv;

        if (pxmitframe->attrib.ether_type != 0x0806) {
                if (pxmitframe->attrib.ether_type != 0x888e)
                        r8712_issue_addbareq_cmd(padapter, pattrib->priority);
        }
        mem_addr = pxmitframe->buf_addr;
        for (t = 0; t < pattrib->nr_frags; t++) {
                if (t != (pattrib->nr_frags - 1)) {
                        sz = pxmitpriv->frag_len;
                        sz = sz - 4 - (psecuritypriv->sw_encrypt ? 0 :
                             pattrib->icv_len);
                        pxmitframe->last[t] = 0;
                } else {
                        sz = pattrib->last_txcmdsz;
                        pxmitframe->last[t] = 1;
                }
                update_txdesc(pxmitframe, (uint *)mem_addr, sz);
                w_sz = sz + TXDESC_SIZE;
                pxmitframe->mem_addr = mem_addr;
                pxmitframe->bpending[t] = false;
                ff_hwaddr = get_ff_hwaddr(pxmitframe);
#ifdef CONFIG_R8712_TX_AGGR
                r8712_write_port(padapter, RTL8712_DMA_H2CCMD, w_sz,
                                (unsigned char *)pxmitframe);
#else
                r8712_write_port(padapter, ff_hwaddr, w_sz,
                           (unsigned char *)pxmitframe);
#endif
                mem_addr += w_sz;
                mem_addr = (u8 *)RND4(((addr_t)(mem_addr)));
        }
}

int r8712_xmit_direct(struct _adapter *padapter, struct xmit_frame *pxmitframe)
{
        int res = _SUCCESS;

        res = r8712_xmitframe_coalesce(padapter, pxmitframe->pkt, pxmitframe);
        pxmitframe->pkt = NULL;
        if (res == _SUCCESS)
                dump_xframe(padapter, pxmitframe);
        return res;
}

int r8712_xmit_enqueue(struct _adapter *padapter, struct xmit_frame *pxmitframe)
{
        if (r8712_xmit_classifier(padapter, pxmitframe) == _FAIL) {
                pxmitframe->pkt = NULL;
                return _FAIL;
        }
        return _SUCCESS;
}