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