drivers/staging/rtl8712/rtl871x_xmit.c

   1 /******************************************************************************
   2  * rtl871x_xmit.c
   3  *
   4  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
   5  * Linux device driver for RTL8192SU
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  19  *
  20  * Modifications for inclusion into the Linux staging tree are
  21  * Copyright(c) 2010 Larry Finger. All rights reserved.
  22  *
  23  * Contact information:
  24  * WLAN FAE <wlanfae@realtek.com>
  25  * Larry Finger <Larry.Finger@lwfinger.net>
  26  *
  27  ******************************************************************************/
  28
  29 #define _RTL871X_XMIT_C_
  30
  31 #include "osdep_service.h"
  32 #include "drv_types.h"
  33 #include "rtl871x_byteorder.h"
  34 #include "wifi.h"
  35 #include "osdep_intf.h"
  36 #include "usb_ops.h"
  37
  38
  39 static const u8 P802_1H_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0xf8};
  40 static const u8 RFC1042_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0x00};
  41 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry);
  42 static void alloc_hwxmits(struct _adapter *padapter);
  43 static void free_hwxmits(struct _adapter *padapter);
  44
  45 static void _init_txservq(struct tx_servq *ptxservq)
  46 {
  47         _init_listhead(&ptxservq->tx_pending);
  48         _init_queue(&ptxservq->sta_pending);
  49         ptxservq->qcnt = 0;
  50 }
  51
  52 void _r8712_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv)
  53 {
  54         memset((unsigned char *)psta_xmitpriv, 0,
  55                  sizeof(struct sta_xmit_priv));
  56         spin_lock_init(&psta_xmitpriv->lock);
  57         _init_txservq(&psta_xmitpriv->be_q);
  58         _init_txservq(&psta_xmitpriv->bk_q);
  59         _init_txservq(&psta_xmitpriv->vi_q);
  60         _init_txservq(&psta_xmitpriv->vo_q);
  61         _init_listhead(&psta_xmitpriv->legacy_dz);
  62         _init_listhead(&psta_xmitpriv->apsd);
  63 }
  64
  65 sint _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
  66                            struct _adapter *padapter)
  67 {
  68         sint i;
  69         struct xmit_buf *pxmitbuf;
  70         struct xmit_frame *pxframe;
  71
  72         memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv));
  73         spin_lock_init(&pxmitpriv->lock);
  74         sema_init(&pxmitpriv->xmit_sema, 0);
  75         sema_init(&pxmitpriv->terminate_xmitthread_sema, 0);
  76         /*
  77         Please insert all the queue initializaiton using _init_queue below
  78         */
  79         pxmitpriv->adapter = padapter;
  80         _init_queue(&pxmitpriv->be_pending);
  81         _init_queue(&pxmitpriv->bk_pending);
  82         _init_queue(&pxmitpriv->vi_pending);
  83         _init_queue(&pxmitpriv->vo_pending);
  84         _init_queue(&pxmitpriv->bm_pending);
  85         _init_queue(&pxmitpriv->legacy_dz_queue);
  86         _init_queue(&pxmitpriv->apsd_queue);
  87         _init_queue(&pxmitpriv->free_xmit_queue);
  88         /*
  89         Please allocate memory with the sz = (struct xmit_frame) * NR_XMITFRAME,
  90         and initialize free_xmit_frame below.
  91         Please also apply  free_txobj to link_up all the xmit_frames...
  92         */
  93         pxmitpriv->pallocated_frame_buf = _malloc(NR_XMITFRAME *
  94                                           sizeof(struct xmit_frame) + 4);
  95         if (pxmitpriv->pallocated_frame_buf == NULL) {
  96                 pxmitpriv->pxmit_frame_buf = NULL;
  97                 return _FAIL;
  98         }
  99         pxmitpriv->pxmit_frame_buf = pxmitpriv->pallocated_frame_buf + 4 -
 100                         ((addr_t) (pxmitpriv->pallocated_frame_buf) & 3);
 101         pxframe = (struct xmit_frame *) pxmitpriv->pxmit_frame_buf;
 102         for (i = 0; i < NR_XMITFRAME; i++) {
 103                 _init_listhead(&(pxframe->list));
 104                 pxframe->padapter = padapter;
 105                 pxframe->frame_tag = DATA_FRAMETAG;
 106                 pxframe->pkt = NULL;
 107                 pxframe->buf_addr = NULL;
 108                 pxframe->pxmitbuf = NULL;
 109                 list_insert_tail(&(pxframe->list),
 110                                  &(pxmitpriv->free_xmit_queue.queue));
 111                 pxframe++;
 112         }
 113         pxmitpriv->free_xmitframe_cnt = NR_XMITFRAME;
 114         /*
 115                 init xmit hw_txqueue
 116         */
 117         _r8712_init_hw_txqueue(&pxmitpriv->be_txqueue, BE_QUEUE_INX);
 118         _r8712_init_hw_txqueue(&pxmitpriv->bk_txqueue, BK_QUEUE_INX);
 119         _r8712_init_hw_txqueue(&pxmitpriv->vi_txqueue, VI_QUEUE_INX);
 120         _r8712_init_hw_txqueue(&pxmitpriv->vo_txqueue, VO_QUEUE_INX);
 121         _r8712_init_hw_txqueue(&pxmitpriv->bmc_txqueue, BMC_QUEUE_INX);
 122         pxmitpriv->frag_len = MAX_FRAG_THRESHOLD;
 123         pxmitpriv->txirp_cnt = 1;
 124         sema_init(&(pxmitpriv->tx_retevt), 0);
 125         /*per AC pending irp*/
 126         pxmitpriv->beq_cnt = 0;
 127         pxmitpriv->bkq_cnt = 0;
 128         pxmitpriv->viq_cnt = 0;
 129         pxmitpriv->voq_cnt = 0;
 130         /*init xmit_buf*/
 131         _init_queue(&pxmitpriv->free_xmitbuf_queue);
 132         _init_queue(&pxmitpriv->pending_xmitbuf_queue);
 133         pxmitpriv->pallocated_xmitbuf = _malloc(NR_XMITBUFF *
 134                                         sizeof(struct xmit_buf) + 4);
 135         if (pxmitpriv->pallocated_xmitbuf  == NULL)
 136                 return _FAIL;
 137         pxmitpriv->pxmitbuf = pxmitpriv->pallocated_xmitbuf + 4 -
 138                               ((addr_t)(pxmitpriv->pallocated_xmitbuf) & 3);
 139         pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
 140         for (i = 0; i < NR_XMITBUFF; i++) {
 141                 _init_listhead(&pxmitbuf->list);
 142                 pxmitbuf->pallocated_buf = _malloc(MAX_XMITBUF_SZ +
 143                                            XMITBUF_ALIGN_SZ);
 144                 if (pxmitbuf->pallocated_buf == NULL)
 145                         return _FAIL;
 146                 pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
 147                                  ((addr_t) (pxmitbuf->pallocated_buf) &
 148                                  (XMITBUF_ALIGN_SZ - 1));
 149                 r8712_xmit_resource_alloc(padapter, pxmitbuf);
 150                 list_insert_tail(&pxmitbuf->list,
 151                                  &(pxmitpriv->free_xmitbuf_queue.queue));
 152                 pxmitbuf++;
 153         }
 154         pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF;
 155         _init_workitem(&padapter->wkFilterRxFF0, r8712_SetFilter, padapter);
 156         alloc_hwxmits(padapter);
 157         init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
 158         tasklet_init(&pxmitpriv->xmit_tasklet,
 159                 (void(*)(unsigned long))r8712_xmit_bh,
 160                 (unsigned long)padapter);
 161         return _SUCCESS;
 162 }
 163
 164 void _free_xmit_priv(struct xmit_priv *pxmitpriv)
 165 {
 166         int i;
 167         struct _adapter *padapter = pxmitpriv->adapter;
 168         struct xmit_frame *pxmitframe = (struct xmit_frame *)
 169                                         pxmitpriv->pxmit_frame_buf;
 170         struct xmit_buf *pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
 171
 172         if (pxmitpriv->pxmit_frame_buf == NULL)
 173                 return;
 174         for (i = 0; i < NR_XMITFRAME; i++) {
 175                 r8712_xmit_complete(padapter, pxmitframe);
 176                 pxmitframe++;
 177         }
 178         for (i = 0; i < NR_XMITBUFF; i++) {
 179                 r8712_xmit_resource_free(padapter, pxmitbuf);
 180                 kfree(pxmitbuf->pallocated_buf);
 181                 pxmitbuf++;
 182         }
 183         kfree(pxmitpriv->pallocated_frame_buf);
 184         kfree(pxmitpriv->pallocated_xmitbuf);
 185         free_hwxmits(padapter);
 186 }
 187
 188 sint r8712_update_attrib(struct _adapter *padapter, _pkt *pkt,
 189                    struct pkt_attrib *pattrib)
 190 {
 191         uint i;
 192         struct pkt_file pktfile;
 193         struct sta_info *psta = NULL;
 194         struct ethhdr etherhdr;
 195
 196         struct tx_cmd txdesc;
 197
 198         sint bmcast;
 199         struct sta_priv         *pstapriv = &padapter->stapriv;
 200         struct security_priv    *psecuritypriv = &padapter->securitypriv;
 201         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 202         struct qos_priv         *pqospriv = &pmlmepriv->qospriv;
 203
 204         _r8712_open_pktfile(pkt, &pktfile);
 205
 206         i = _r8712_pktfile_read(&pktfile, (unsigned char *)&etherhdr, ETH_HLEN);
 207
 208         pattrib->ether_type = ntohs(etherhdr.h_proto);
 209
 210 {
 211         u8 bool;
 212         /*If driver xmit ARP packet, driver can set ps mode to initial
 213          * setting. It stands for getting DHCP or fix IP.*/
 214         if (pattrib->ether_type == 0x0806) {
 215                 if (padapter->pwrctrlpriv.pwr_mode !=
 216                     padapter->registrypriv.power_mgnt) {
 217                         _cancel_timer(&(pmlmepriv->dhcp_timer), &bool);
 218                         r8712_set_ps_mode(padapter, padapter->registrypriv.
 219                                 power_mgnt, padapter->registrypriv.smart_ps);
 220                 }
 221         }
 222 }
 223         memcpy(pattrib->dst, &etherhdr.h_dest, ETH_ALEN);
 224         memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);
 225         pattrib->pctrl = 0;
 226         if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
 227             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
 228                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 229                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 230         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 231                 memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
 232                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 233         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 234                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 235                 memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
 236         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
 237                 /*firstly, filter packet not belongs to mp*/
 238                 if (pattrib->ether_type != 0x8712)
 239                         return _FAIL;
 240                 /* for mp storing the txcmd per packet,
 241                  * according to the info of txcmd to update pattrib */
 242                 /*get MP_TXDESC_SIZE bytes txcmd per packet*/
 243                 i = _r8712_pktfile_read(&pktfile, (u8 *)&txdesc, TXDESC_SIZE);
 244                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 245                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 246                 pattrib->pctrl = 1;
 247         }
 248         /* r8712_xmitframe_coalesce() overwrite this!*/
 249         pattrib->pktlen = pktfile.pkt_len;
 250         if (ETH_P_IP == pattrib->ether_type) {
 251                 /* The following is for DHCP and ARP packet, we use cck1M to
 252                  * tx these packets and let LPS awake some time
 253                  * to prevent DHCP protocol fail */
 254                 u8 tmp[24];
 255                 _r8712_pktfile_read(&pktfile, &tmp[0], 24);
 256                 pattrib->dhcp_pkt = 0;
 257                 if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
 258                         if (ETH_P_IP == pattrib->ether_type) {/* IP header*/
 259                                 if (((tmp[21] == 68) && (tmp[23] == 67)) ||
 260                                         ((tmp[21] == 67) && (tmp[23] == 68))) {
 261                                         /* 68 : UDP BOOTP client
 262                                          * 67 : UDP BOOTP server
 263                                          * Use low rate to send DHCP packet.*/
 264                                         pattrib->dhcp_pkt = 1;
 265                                 }
 266                         }
 267                 }
 268         }
 269         bmcast = IS_MCAST(pattrib->ra);
 270         /* get sta_info*/
 271         if (bmcast) {
 272                 psta = r8712_get_bcmc_stainfo(padapter);
 273                 pattrib->mac_id = 4;
 274         } else {
 275                 if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
 276                         psta = r8712_get_stainfo(pstapriv,
 277                                                  get_bssid(pmlmepriv));
 278                         pattrib->mac_id = 5;
 279                 } else {
 280                         psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 281                         if (psta == NULL)  /* drop the pkt */
 282                                 return _FAIL;
 283                         if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
 284                                 pattrib->mac_id = 5;
 285                         else
 286                                 pattrib->mac_id = psta->mac_id;
 287                 }
 288         }
 289
 290         if (psta) {
 291                 pattrib->psta = psta;
 292         } else {
 293                 /* if we cannot get psta => drrp the pkt */
 294                 return _FAIL;
 295         }
 296
 297         pattrib->ack_policy = 0;
 298         /* get ether_hdr_len */
 299         pattrib->pkt_hdrlen = ETH_HLEN;
 300
 301         if (pqospriv->qos_option)
 302                 r8712_set_qos(&pktfile, pattrib);
 303         else {
 304                 pattrib->hdrlen = WLAN_HDR_A3_LEN;
 305                 pattrib->subtype = WIFI_DATA_TYPE;
 306                 pattrib->priority = 0;
 307         }
 308         if (psta->ieee8021x_blocked == true) {
 309                 pattrib->encrypt = 0;
 310                 if ((pattrib->ether_type != 0x888e) &&
 311                     (check_fwstate(pmlmepriv, WIFI_MP_STATE) == false))
 312                         return _FAIL;
 313         } else
 314                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
 315         switch (pattrib->encrypt) {
 316         case _WEP40_:
 317         case _WEP104_:
 318                 pattrib->iv_len = 4;
 319                 pattrib->icv_len = 4;
 320                 break;
 321         case _TKIP_:
 322                 pattrib->iv_len = 8;
 323                 pattrib->icv_len = 4;
 324                 if (padapter->securitypriv.busetkipkey == _FAIL)
 325                         return _FAIL;
 326                 break;
 327         case _AES_:
 328                 pattrib->iv_len = 8;
 329                 pattrib->icv_len = 8;
 330                 break;
 331         default:
 332                 pattrib->iv_len = 0;
 333                 pattrib->icv_len = 0;
 334                 break;
 335         }
 336
 337         if (pattrib->encrypt &&
 338             ((padapter->securitypriv.sw_encrypt == true) ||
 339              (psecuritypriv->hw_decrypted == false)))
 340                 pattrib->bswenc = true;
 341         else
 342                 pattrib->bswenc = false;
 343         /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
 344          * some settings above.*/
 345         if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
 346                 pattrib->priority = (txdesc.txdw1 >> QSEL_SHT) & 0x1f;
 347         return _SUCCESS;
 348 }
 349
 350 static sint xmitframe_addmic(struct _adapter *padapter,
 351                              struct xmit_frame *pxmitframe)
 352 {
 353         u32     curfragnum, length, datalen;
 354         u8      *pframe, *payload, mic[8];
 355         struct  mic_data micdata;
 356         struct  sta_info *stainfo;
 357         struct  qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
 358         struct  pkt_attrib  *pattrib = &pxmitframe->attrib;
 359         struct  security_priv *psecuritypriv = &padapter->securitypriv;
 360         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 361         u8 priority[4] = {0x0, 0x0, 0x0, 0x0};
 362         sint bmcst = IS_MCAST(pattrib->ra);
 363
 364         if (pattrib->psta)
 365                 stainfo = pattrib->psta;
 366         else
 367                 stainfo = r8712_get_stainfo(&padapter->stapriv,
 368                                             &pattrib->ra[0]);
 369         if (pattrib->encrypt == _TKIP_) {
 370                 /*encode mic code*/
 371                 if (stainfo != NULL) {
 372                         u8 null_key[16] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
 373                                            0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
 374                                            0x0, 0x0};
 375                         datalen = pattrib->pktlen - pattrib->hdrlen;
 376                         pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
 377                         if (bmcst) {
 378                                 if (!memcmp(psecuritypriv->XGrptxmickey
 379                                    [psecuritypriv->XGrpKeyid].skey,
 380                                    null_key, 16))
 381                                         return _FAIL;
 382                                 /*start to calculate the mic code*/
 383                                 r8712_secmicsetkey(&micdata,
 384                                          psecuritypriv->
 385                                          XGrptxmickey[psecuritypriv->
 386                                         XGrpKeyid].skey);
 387                         } else {
 388                                 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
 389                                             null_key, 16))
 390                                         return _FAIL;
 391                                 /* start to calculate the mic code */
 392                                 r8712_secmicsetkey(&micdata,
 393                                              &stainfo->tkiptxmickey.skey[0]);
 394                         }
 395                         if (pframe[1] & 1) {   /* ToDS==1 */
 396                                 r8712_secmicappend(&micdata,
 397                                                    &pframe[16], 6); /*DA*/
 398                                 if (pframe[1]&2)  /* From Ds==1 */
 399                                         r8712_secmicappend(&micdata,
 400                                                            &pframe[24], 6);
 401                                 else
 402                                         r8712_secmicappend(&micdata,
 403                                                            &pframe[10], 6);
 404                         } else {        /* ToDS==0 */
 405                                 r8712_secmicappend(&micdata,
 406                                                    &pframe[4], 6); /* DA */
 407                                 if (pframe[1]&2)  /* From Ds==1 */
 408                                         r8712_secmicappend(&micdata,
 409                                                            &pframe[16], 6);
 410                                 else
 411                                         r8712_secmicappend(&micdata,
 412                                                            &pframe[10], 6);
 413                         }
 414                         if (pqospriv->qos_option == 1)
 415                                         priority[0] = (u8)pxmitframe->
 416                                                       attrib.priority;
 417                         r8712_secmicappend(&micdata, &priority[0], 4);
 418                         payload = pframe;
 419                         for (curfragnum = 0; curfragnum < pattrib->nr_frags;
 420                              curfragnum++) {
 421                                 payload = (u8 *)RND4((addr_t)(payload));
 422                                 payload = payload+pattrib->
 423                                           hdrlen+pattrib->iv_len;
 424                                 if ((curfragnum + 1) == pattrib->nr_frags) {
 425                                         length = pattrib->last_txcmdsz -
 426                                                   pattrib->hdrlen -
 427                                                   pattrib->iv_len -
 428                                                   ((psecuritypriv->sw_encrypt)
 429                                                   ? pattrib->icv_len : 0);
 430                                         r8712_secmicappend(&micdata, payload,
 431                                                            length);
 432                                         payload = payload+length;
 433                                 } else{
 434                                         length = pxmitpriv->frag_len -
 435                                             pattrib->hdrlen-pattrib->iv_len -
 436                                             ((psecuritypriv->sw_encrypt) ?
 437                                             pattrib->icv_len : 0);
 438                                         r8712_secmicappend(&micdata, payload,
 439                                                            length);
 440                                         payload = payload + length +
 441                                                   pattrib->icv_len;
 442                                 }
 443                         }
 444                         r8712_secgetmic(&micdata, &(mic[0]));
 445                         /* add mic code  and add the mic code length in
 446                          * last_txcmdsz */
 447                         memcpy(payload, &(mic[0]), 8);
 448                         pattrib->last_txcmdsz += 8;
 449                         payload = payload-pattrib->last_txcmdsz + 8;
 450                 }
 451         }
 452         return _SUCCESS;
 453 }
 454
 455 static sint xmitframe_swencrypt(struct _adapter *padapter,
 456                                 struct xmit_frame *pxmitframe)
 457 {
 458         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 459
 460         if (pattrib->bswenc) {
 461                 switch (pattrib->encrypt) {
 462                 case _WEP40_:
 463                 case _WEP104_:
 464                         r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
 465                         break;
 466                 case _TKIP_:
 467                         r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
 468                         break;
 469                 case _AES_:
 470                         r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
 471                         break;
 472                 default:
 473                                 break;
 474                 }
 475         }
 476         return _SUCCESS;
 477 }
 478
 479 static sint make_wlanhdr(struct _adapter *padapter , u8 *hdr,
 480                          struct pkt_attrib *pattrib)
 481 {
 482         u16 *qc;
 483
 484         struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
 485         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 486         struct qos_priv *pqospriv = &pmlmepriv->qospriv;
 487         u16 *fctrl = &pwlanhdr->frame_ctl;
 488         memset(hdr, 0, WLANHDR_OFFSET);
 489         SetFrameSubType(fctrl, pattrib->subtype);
 490         if (pattrib->subtype & WIFI_DATA_TYPE) {
 491                 if ((check_fwstate(pmlmepriv,  WIFI_STATION_STATE) == true)) {
 492                         /* to_ds = 1, fr_ds = 0; */
 493                         SetToDs(fctrl);
 494                         memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv),
 495                                 ETH_ALEN);
 496                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 497                         memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
 498                 } else if ((check_fwstate(pmlmepriv, WIFI_AP_STATE) == true)) {
 499                         /* to_ds = 0, fr_ds = 1; */
 500                         SetFrDs(fctrl);
 501                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 502                         memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv),
 503                                 ETH_ALEN);
 504                         memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);
 505                 } else if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true)
 506                            || (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)
 507                            == true)) {
 508                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 509                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 510                         memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
 511                                 ETH_ALEN);
 512                 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
 513                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 514                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 515                         memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
 516                                 ETH_ALEN);
 517                 } else
 518                         return _FAIL;
 519
 520                 if (pattrib->encrypt)
 521                         SetPrivacy(fctrl);
 522                 if (pqospriv->qos_option) {
 523                         qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
 524                         if (pattrib->priority)
 525                                 SetPriority(qc, pattrib->priority);
 526                         SetAckpolicy(qc, pattrib->ack_policy);
 527                 }
 528                 /* TODO: fill HT Control Field */
 529                 /* Update Seq Num will be handled by f/w */
 530                 {
 531                         struct sta_info *psta;
 532
 533                         sint bmcst = IS_MCAST(pattrib->ra);
 534                         if (pattrib->psta)
 535                                 psta = pattrib->psta;
 536                         else {
 537                                 if (bmcst)
 538                                         psta = r8712_get_bcmc_stainfo(padapter);
 539                                 else
 540                                         psta =
 541                                          r8712_get_stainfo(&padapter->stapriv,
 542                                          pattrib->ra);
 543                         }
 544                         if (psta) {
 545                                 psta->sta_xmitpriv.txseq_tid
 546                                                   [pattrib->priority]++;
 547                                 psta->sta_xmitpriv.txseq_tid[pattrib->priority]
 548                                                    &= 0xFFF;
 549                                 pattrib->seqnum = psta->sta_xmitpriv.
 550                                                   txseq_tid[pattrib->priority];
 551                                 SetSeqNum(hdr, pattrib->seqnum);
 552                         }
 553                 }
 554         }
 555         return _SUCCESS;
 556 }
 557
 558 static sint r8712_put_snap(u8 *data, u16 h_proto)
 559 {
 560         struct ieee80211_snap_hdr *snap;
 561         const u8 *oui;
 562
 563         snap = (struct ieee80211_snap_hdr *)data;
 564         snap->dsap = 0xaa;
 565         snap->ssap = 0xaa;
 566         snap->ctrl = 0x03;
 567         if (h_proto == 0x8137 || h_proto == 0x80f3)
 568                 oui = P802_1H_OUI;
 569         else
 570                 oui = RFC1042_OUI;
 571         snap->oui[0] = oui[0];
 572         snap->oui[1] = oui[1];
 573         snap->oui[2] = oui[2];
 574         *(u16 *)(data + SNAP_SIZE) = htons(h_proto);
 575         return SNAP_SIZE + sizeof(u16);
 576 }
 577
 578 /*
 579  * This sub-routine will perform all the following:
 580  * 1. remove 802.3 header.
 581  * 2. create wlan_header, based on the info in pxmitframe
 582  * 3. append sta's iv/ext-iv
 583  * 4. append LLC
 584  * 5. move frag chunk from pframe to pxmitframe->mem
 585  * 6. apply sw-encrypt, if necessary.
 586  */
 587 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
 588                         struct xmit_frame *pxmitframe)
 589 {
 590         struct pkt_file pktfile;
 591
 592         sint    frg_len, mpdu_len, llc_sz;
 593         u32     mem_sz;
 594         u8      frg_inx;
 595         addr_t addr;
 596         u8 *pframe, *mem_start, *ptxdesc;
 597         struct sta_info         *psta;
 598         struct security_priv    *psecuritypriv = &padapter->securitypriv;
 599         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 600         struct xmit_priv        *pxmitpriv = &padapter->xmitpriv;
 601         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 602         u8 *pbuf_start;
 603         sint bmcst = IS_MCAST(pattrib->ra);
 604
 605         if (pattrib->psta == NULL)
 606                 return _FAIL;
 607         psta = pattrib->psta;
 608         if (pxmitframe->buf_addr == NULL)
 609                 return _FAIL;
 610         pbuf_start = pxmitframe->buf_addr;
 611         ptxdesc = pbuf_start;
 612         mem_start = pbuf_start + TXDESC_OFFSET;
 613         if (make_wlanhdr(padapter, mem_start, pattrib) == _FAIL)
 614                 return _FAIL;
 615         _r8712_open_pktfile(pkt, &pktfile);
 616         _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
 617         if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
 618                 /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
 619                 if (pattrib->ether_type == 0x8712) {
 620                         /* take care -  update_txdesc overwrite this */
 621                         _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
 622                 }
 623         }
 624         pattrib->pktlen = pktfile.pkt_len;
 625         frg_inx = 0;
 626         frg_len = pxmitpriv->frag_len - 4;
 627         while (1) {
 628                 llc_sz = 0;
 629                 mpdu_len = frg_len;
 630                 pframe = mem_start;
 631                 SetMFrag(mem_start);
 632                 pframe += pattrib->hdrlen;
 633                 mpdu_len -= pattrib->hdrlen;
 634                 /* adding icv, if necessary...*/
 635                 if (pattrib->iv_len) {
 636                         if (psta != NULL) {
 637                                 switch (pattrib->encrypt) {
 638                                 case _WEP40_:
 639                                 case _WEP104_:
 640                                         WEP_IV(pattrib->iv, psta->txpn,
 641                                                (u8)psecuritypriv->
 642                                                PrivacyKeyIndex);
 643                                         break;
 644                                 case _TKIP_:
 645                                         if (bmcst)
 646                                                 TKIP_IV(pattrib->iv,
 647                                                     psta->txpn,
 648                                                     (u8)psecuritypriv->
 649                                                     XGrpKeyid);
 650                                         else
 651                                                 TKIP_IV(pattrib->iv, psta->txpn,
 652                                                         0);
 653                                         break;
 654                                 case _AES_:
 655                                         if (bmcst)
 656                                                 AES_IV(pattrib->iv, psta->txpn,
 657                                                     (u8)psecuritypriv->
 658                                                     XGrpKeyid);
 659                                         else
 660                                                 AES_IV(pattrib->iv, psta->txpn,
 661                                                        0);
 662                                         break;
 663                                 }
 664                         }
 665                         memcpy(pframe, pattrib->iv, pattrib->iv_len);
 666                         pframe += pattrib->iv_len;
 667                         mpdu_len -= pattrib->iv_len;
 668                 }
 669                 if (frg_inx == 0) {
 670                         llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
 671                         pframe += llc_sz;
 672                         mpdu_len -= llc_sz;
 673                 }
 674                 if ((pattrib->icv_len > 0) && (pattrib->bswenc))
 675                         mpdu_len -= pattrib->icv_len;
 676                 if (bmcst)
 677                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 678                                  pattrib->pktlen);
 679                 else
 680                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 681                                  mpdu_len);
 682                 pframe += mem_sz;
 683                 if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
 684                         memcpy(pframe, pattrib->icv, pattrib->icv_len);
 685                         pframe += pattrib->icv_len;
 686                 }
 687                 frg_inx++;
 688                 if (bmcst || (r8712_endofpktfile(&pktfile) == true)) {
 689                         pattrib->nr_frags = frg_inx;
 690                         pattrib->last_txcmdsz = pattrib->hdrlen +
 691                                                 pattrib->iv_len +
 692                                                 ((pattrib->nr_frags == 1) ?
 693                                                 llc_sz : 0) +
 694                                                 ((pattrib->bswenc) ?
 695                                                 pattrib->icv_len : 0) + mem_sz;
 696                         ClearMFrag(mem_start);
 697                         break;
 698                 }
 699                 addr = (addr_t)(pframe);
 700                 mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
 701                 memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
 702         }
 703
 704         if (xmitframe_addmic(padapter, pxmitframe) == _FAIL)
 705                 return _FAIL;
 706         xmitframe_swencrypt(padapter, pxmitframe);
 707         return _SUCCESS;
 708 }
 709
 710 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
 711 {
 712         uint    protection;
 713         u8      *perp;
 714         sint     erp_len;
 715         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 716         struct  registry_priv *pregistrypriv = &padapter->registrypriv;
 717
 718         switch (pxmitpriv->vcs_setting) {
 719         case DISABLE_VCS:
 720                 pxmitpriv->vcs = NONE_VCS;
 721                 break;
 722         case ENABLE_VCS:
 723                 break;
 724         case AUTO_VCS:
 725         default:
 726                 perp = r8712_get_ie(ie, _ERPINFO_IE_, &erp_len, ie_len);
 727                 if (perp == NULL)
 728                         pxmitpriv->vcs = NONE_VCS;
 729                 else {
 730                         protection = (*(perp + 2)) & BIT(1);
 731                         if (protection) {
 732                                 if (pregistrypriv->vcs_type == RTS_CTS)
 733                                         pxmitpriv->vcs = RTS_CTS;
 734                                 else
 735                                         pxmitpriv->vcs = CTS_TO_SELF;
 736                         } else
 737                                 pxmitpriv->vcs = NONE_VCS;
 738                 }
 739                 break;
 740         }
 741 }
 742
 743 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
 744 {
 745         unsigned long irqL;
 746         struct xmit_buf *pxmitbuf =  NULL;
 747         struct list_head *plist, *phead;
 748         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 749
 750         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 751         if (_queue_empty(pfree_xmitbuf_queue) == true)
 752                 pxmitbuf = NULL;
 753         else {
 754                 phead = get_list_head(pfree_xmitbuf_queue);
 755                 plist = get_next(phead);
 756                 pxmitbuf = LIST_CONTAINOR(plist, struct xmit_buf, list);
 757                 list_delete(&(pxmitbuf->list));
 758         }
 759         if (pxmitbuf !=  NULL)
 760                 pxmitpriv->free_xmitbuf_cnt--;
 761         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 762         return pxmitbuf;
 763 }
 764
 765 int r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
 766 {
 767         unsigned long irqL;
 768         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 769
 770         if (pxmitbuf == NULL)
 771                 return _FAIL;
 772         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 773         list_delete(&pxmitbuf->list);
 774         list_insert_tail(&(pxmitbuf->list), get_list_head(pfree_xmitbuf_queue));
 775         pxmitpriv->free_xmitbuf_cnt++;
 776         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 777         return _SUCCESS;
 778 }
 779
 780 /*
 781 Calling context:
 782 1. OS_TXENTRY
 783 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
 784
 785 If we turn on USE_RXTHREAD, then, no need for critical section.
 786 Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
 787
 788 Must be very very cautious...
 789
 790 */
 791
 792 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
 793 {
 794         /*
 795                 Please remember to use all the osdep_service api,
 796                 and lock/unlock or _enter/_exit critical to protect
 797                 pfree_xmit_queue
 798         */
 799         unsigned long irqL;
 800         struct xmit_frame *pxframe = NULL;
 801         struct list_head *plist, *phead;
 802         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 803
 804         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 805         if (_queue_empty(pfree_xmit_queue) == true)
 806                 pxframe =  NULL;
 807         else {
 808                 phead = get_list_head(pfree_xmit_queue);
 809                 plist = get_next(phead);
 810                 pxframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
 811                 list_delete(&(pxframe->list));
 812         }
 813         if (pxframe !=  NULL) {
 814                 pxmitpriv->free_xmitframe_cnt--;
 815                 pxframe->buf_addr = NULL;
 816                 pxframe->pxmitbuf = NULL;
 817                 pxframe->attrib.psta = NULL;
 818                 pxframe->pkt = NULL;
 819         }
 820         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 821         return pxframe;
 822 }
 823
 824 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
 825                           struct xmit_frame *pxmitframe)
 826 {
 827         unsigned long irqL;
 828         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 829         struct _adapter *padapter = pxmitpriv->adapter;
 830         struct sk_buff *pndis_pkt = NULL;
 831
 832         if (pxmitframe == NULL)
 833                 return;
 834         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 835         list_delete(&pxmitframe->list);
 836         if (pxmitframe->pkt) {
 837                 pndis_pkt = pxmitframe->pkt;
 838                 pxmitframe->pkt = NULL;
 839         }
 840         list_insert_tail(&pxmitframe->list, get_list_head(pfree_xmit_queue));
 841         pxmitpriv->free_xmitframe_cnt++;
 842         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 843         if (netif_queue_stopped(padapter->pnetdev))
 844                 netif_wake_queue(padapter->pnetdev);
 845 }
 846
 847 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
 848                       struct xmit_frame *pxmitframe)
 849 {
 850         if (pxmitframe == NULL)
 851                 return;
 852         if (pxmitframe->frame_tag == DATA_FRAMETAG)
 853                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 854 }
 855
 856 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
 857                                 struct  __queue *pframequeue)
 858 {
 859         unsigned long irqL;
 860         struct list_head *plist, *phead;
 861         struct  xmit_frame      *pxmitframe;
 862
 863         spin_lock_irqsave(&(pframequeue->lock), irqL);
 864         phead = get_list_head(pframequeue);
 865         plist = get_next(phead);
 866         while (end_of_queue_search(phead, plist) == false) {
 867                 pxmitframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
 868                 plist = get_next(plist);
 869                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 870         }
 871         spin_unlock_irqrestore(&(pframequeue->lock), irqL);
 872 }
 873
 874 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
 875                                                struct  __queue **ppstapending,
 876                                                struct sta_info *psta, sint up)
 877 {
 878
 879         struct tx_servq *ptxservq;
 880         struct hw_xmit *phwxmits =  padapter->xmitpriv.hwxmits;
 881
 882         switch (up) {
 883         case 1:
 884         case 2:
 885                 ptxservq = &(psta->sta_xmitpriv.bk_q);
 886                 *ppstapending = &padapter->xmitpriv.bk_pending;
 887                 (phwxmits+3)->accnt++;
 888                 break;
 889         case 4:
 890         case 5:
 891                 ptxservq = &(psta->sta_xmitpriv.vi_q);
 892                 *ppstapending = &padapter->xmitpriv.vi_pending;
 893                 (phwxmits+1)->accnt++;
 894                 break;
 895         case 6:
 896         case 7:
 897                 ptxservq = &(psta->sta_xmitpriv.vo_q);
 898                 *ppstapending = &padapter->xmitpriv.vo_pending;
 899                 (phwxmits+0)->accnt++;
 900                 break;
 901         case 0:
 902         case 3:
 903         default:
 904                 ptxservq = &(psta->sta_xmitpriv.be_q);
 905                 *ppstapending = &padapter->xmitpriv.be_pending;
 906                 (phwxmits + 2)->accnt++;
 907                 break;
 908         }
 909         return ptxservq;
 910 }
 911
 912 /*
 913  * Will enqueue pxmitframe to the proper queue, and indicate it
 914  * to xx_pending list.....
 915  */
 916 sint r8712_xmit_classifier(struct _adapter *padapter,
 917                            struct xmit_frame *pxmitframe)
 918 {
 919         unsigned long irqL0;
 920         struct  __queue *pstapending;
 921         struct sta_info *psta;
 922         struct tx_servq *ptxservq;
 923         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 924         struct sta_priv *pstapriv = &padapter->stapriv;
 925         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 926         sint bmcst = IS_MCAST(pattrib->ra);
 927
 928         if (pattrib->psta)
 929                 psta = pattrib->psta;
 930         else {
 931                 if (bmcst)
 932                         psta = r8712_get_bcmc_stainfo(padapter);
 933                 else {
 934                         if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
 935                                 psta = r8712_get_stainfo(pstapriv,
 936                                        get_bssid(pmlmepriv));
 937                         else
 938                                 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 939                 }
 940         }
 941         if (psta == NULL)
 942                 return _FAIL;
 943         ptxservq = get_sta_pending(padapter, &pstapending,
 944                    psta, pattrib->priority);
 945         spin_lock_irqsave(&pstapending->lock, irqL0);
 946         if (is_list_empty(&ptxservq->tx_pending))
 947                 list_insert_tail(&ptxservq->tx_pending,
 948                                  get_list_head(pstapending));
 949         list_insert_tail(&pxmitframe->list,
 950                          get_list_head(&ptxservq->sta_pending));
 951         ptxservq->qcnt++;
 952         spin_unlock_irqrestore(&pstapending->lock, irqL0);
 953         return _SUCCESS;
 954 }
 955
 956 static void alloc_hwxmits(struct _adapter *padapter)
 957 {
 958         struct hw_xmit *hwxmits;
 959         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 960
 961         pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
 962         pxmitpriv->hwxmits = (struct hw_xmit *)_malloc(sizeof(struct hw_xmit) *
 963                              pxmitpriv->hwxmit_entry);
 964         if (pxmitpriv->hwxmits == NULL)
 965                 return;
 966         hwxmits = pxmitpriv->hwxmits;
 967         if (pxmitpriv->hwxmit_entry == 5) {
 968                 pxmitpriv->bmc_txqueue.head = 0;
 969                 hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
 970                 hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
 971                 pxmitpriv->vo_txqueue.head = 0;
 972                 hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
 973                 hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
 974         pxmitpriv->vi_txqueue.head = 0;
 975                 hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
 976                 hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
 977                 pxmitpriv->bk_txqueue.head = 0;
 978                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 979                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 980                 pxmitpriv->be_txqueue.head = 0;
 981                 hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
 982                 hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
 983         } else if (pxmitpriv->hwxmit_entry == 4) {
 984                 pxmitpriv->vo_txqueue.head = 0;
 985                 hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
 986                 hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
 987                 pxmitpriv->vi_txqueue.head = 0;
 988                 hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
 989                 hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
 990                 pxmitpriv->be_txqueue.head = 0;
 991                 hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
 992                 hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
 993                 pxmitpriv->bk_txqueue.head = 0;
 994                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 995                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 996         }
 997 }
 998
 999 static void free_hwxmits(struct _adapter *padapter)
1000 {
1001         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1002
1003         kfree(pxmitpriv->hwxmits);
1004 }
1005
1006 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
1007 {
1008         sint i;
1009
1010         for (i = 0; i < entry; i++, phwxmit++) {
1011                 spin_lock_init(&phwxmit->xmit_lock);
1012                 _init_listhead(&phwxmit->pending);
1013                 phwxmit->txcmdcnt = 0;
1014                 phwxmit->accnt = 0;
1015         }
1016 }
1017
1018 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
1019                         struct xmit_buf *pxmitbuf)
1020 {
1021         /* pxmitbuf attach to pxmitframe */
1022         pxmitframe->pxmitbuf = pxmitbuf;
1023         /* urb and irp connection */
1024         pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
1025         /* buffer addr assoc */
1026         pxmitframe->buf_addr = pxmitbuf->pbuf;
1027         /* pxmitframe attach to pxmitbuf */
1028         pxmitbuf->priv_data = pxmitframe;
1029 }
1030
1031 /*
1032  * tx_action == 0 == no frames to transmit
1033  * tx_action > 0 ==> we have frames to transmit
1034  * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1035  *                                               to transmit 1 frame.
1036  */
1037
1038 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1039 {
1040         unsigned long irqL;
1041         int ret;
1042         struct xmit_buf *pxmitbuf = NULL;
1043         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1044         struct pkt_attrib *pattrib = &pxmitframe->attrib;
1045
1046         r8712_do_queue_select(padapter, pattrib);
1047         spin_lock_irqsave(&pxmitpriv->lock, irqL);
1048         if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1049                 ret = false;
1050                 r8712_xmit_enqueue(padapter, pxmitframe);
1051                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1052                 return ret;
1053         }
1054         pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1055         if (pxmitbuf == NULL) { /*enqueue packet*/
1056                 ret = false;
1057                 r8712_xmit_enqueue(padapter, pxmitframe);
1058                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1059         } else { /*dump packet directly*/
1060                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1061                 ret = true;
1062                 xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1063                 r8712_xmit_direct(padapter, pxmitframe);
1064         }
1065         return ret;
1066 }