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 == NULL) {
  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  == NULL)
 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 == NULL)
 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         uint i;
 188         struct pkt_file pktfile;
 189         struct sta_info *psta = NULL;
 190         struct ethhdr etherhdr;
 191
 192         struct tx_cmd txdesc;
 193
 194         sint bmcast;
 195         struct sta_priv         *pstapriv = &padapter->stapriv;
 196         struct security_priv    *psecuritypriv = &padapter->securitypriv;
 197         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 198         struct qos_priv         *pqospriv = &pmlmepriv->qospriv;
 199
 200         _r8712_open_pktfile(pkt, &pktfile);
 201
 202         i = _r8712_pktfile_read(&pktfile, (unsigned char *)&etherhdr, ETH_HLEN);
 203
 204         pattrib->ether_type = ntohs(etherhdr.h_proto);
 205
 206 {
 207         u8 bool;
 208         /*If driver xmit ARP packet, driver can set ps mode to initial
 209          * setting. It stands for getting DHCP or fix IP.*/
 210         if (pattrib->ether_type == 0x0806) {
 211                 if (padapter->pwrctrlpriv.pwr_mode !=
 212                     padapter->registrypriv.power_mgnt) {
 213                         _cancel_timer(&(pmlmepriv->dhcp_timer), &bool);
 214                         r8712_set_ps_mode(padapter, padapter->registrypriv.
 215                                 power_mgnt, padapter->registrypriv.smart_ps);
 216                 }
 217         }
 218 }
 219         memcpy(pattrib->dst, &etherhdr.h_dest, ETH_ALEN);
 220         memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);
 221         pattrib->pctrl = 0;
 222         if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
 223             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
 224                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 225                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 226         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 227                 memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
 228                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 229         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 230                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 231                 memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
 232         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
 233                 /*firstly, filter packet not belongs to mp*/
 234                 if (pattrib->ether_type != 0x8712)
 235                         return _FAIL;
 236                 /* for mp storing the txcmd per packet,
 237                  * according to the info of txcmd to update pattrib */
 238                 /*get MP_TXDESC_SIZE bytes txcmd per packet*/
 239                 i = _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 (ETH_P_IP == pattrib->ether_type) {
 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                 u8 tmp[24];
 251
 252                 _r8712_pktfile_read(&pktfile, &tmp[0], 24);
 253                 pattrib->dhcp_pkt = 0;
 254                 if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
 255                         if (ETH_P_IP == pattrib->ether_type) {/* IP header*/
 256                                 if (((tmp[21] == 68) && (tmp[23] == 67)) ||
 257                                         ((tmp[21] == 67) && (tmp[23] == 68))) {
 258                                         /* 68 : UDP BOOTP client
 259                                          * 67 : UDP BOOTP server
 260                                          * Use low rate to send DHCP packet.*/
 261                                         pattrib->dhcp_pkt = 1;
 262                                 }
 263                         }
 264                 }
 265         }
 266         bmcast = IS_MCAST(pattrib->ra);
 267         /* get sta_info*/
 268         if (bmcast) {
 269                 psta = r8712_get_bcmc_stainfo(padapter);
 270                 pattrib->mac_id = 4;
 271         } else {
 272                 if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
 273                         psta = r8712_get_stainfo(pstapriv,
 274                                                  get_bssid(pmlmepriv));
 275                         pattrib->mac_id = 5;
 276                 } else {
 277                         psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 278                         if (psta == NULL)  /* drop the pkt */
 279                                 return _FAIL;
 280                         if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
 281                                 pattrib->mac_id = 5;
 282                         else
 283                                 pattrib->mac_id = psta->mac_id;
 284                 }
 285         }
 286
 287         if (psta) {
 288                 pattrib->psta = psta;
 289         } else {
 290                 /* if we cannot get psta => drrp the pkt */
 291                 return _FAIL;
 292         }
 293
 294         pattrib->ack_policy = 0;
 295         /* get ether_hdr_len */
 296         pattrib->pkt_hdrlen = ETH_HLEN;
 297
 298         if (pqospriv->qos_option)
 299                 r8712_set_qos(&pktfile, pattrib);
 300         else {
 301                 pattrib->hdrlen = WLAN_HDR_A3_LEN;
 302                 pattrib->subtype = WIFI_DATA_TYPE;
 303                 pattrib->priority = 0;
 304         }
 305         if (psta->ieee8021x_blocked == true) {
 306                 pattrib->encrypt = 0;
 307                 if ((pattrib->ether_type != 0x888e) &&
 308                     (check_fwstate(pmlmepriv, WIFI_MP_STATE) == false))
 309                         return _FAIL;
 310         } else
 311                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
 312         switch (pattrib->encrypt) {
 313         case _WEP40_:
 314         case _WEP104_:
 315                 pattrib->iv_len = 4;
 316                 pattrib->icv_len = 4;
 317                 break;
 318         case _TKIP_:
 319                 pattrib->iv_len = 8;
 320                 pattrib->icv_len = 4;
 321                 if (padapter->securitypriv.busetkipkey == _FAIL)
 322                         return _FAIL;
 323                 break;
 324         case _AES_:
 325                 pattrib->iv_len = 8;
 326                 pattrib->icv_len = 8;
 327                 break;
 328         default:
 329                 pattrib->iv_len = 0;
 330                 pattrib->icv_len = 0;
 331                 break;
 332         }
 333
 334         if (pattrib->encrypt &&
 335             ((padapter->securitypriv.sw_encrypt == true) ||
 336              (psecuritypriv->hw_decrypted == false)))
 337                 pattrib->bswenc = true;
 338         else
 339                 pattrib->bswenc = false;
 340         /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
 341          * some settings above.*/
 342         if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
 343                 pattrib->priority = (txdesc.txdw1 >> QSEL_SHT) & 0x1f;
 344         return _SUCCESS;
 345 }
 346
 347 static sint xmitframe_addmic(struct _adapter *padapter,
 348                              struct xmit_frame *pxmitframe)
 349 {
 350         u32     curfragnum, length, datalen;
 351         u8      *pframe, *payload, mic[8];
 352         struct  mic_data micdata;
 353         struct  sta_info *stainfo;
 354         struct  qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
 355         struct  pkt_attrib  *pattrib = &pxmitframe->attrib;
 356         struct  security_priv *psecuritypriv = &padapter->securitypriv;
 357         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 358         u8 priority[4] = {0x0, 0x0, 0x0, 0x0};
 359         sint bmcst = IS_MCAST(pattrib->ra);
 360
 361         if (pattrib->psta)
 362                 stainfo = pattrib->psta;
 363         else
 364                 stainfo = r8712_get_stainfo(&padapter->stapriv,
 365                                             &pattrib->ra[0]);
 366         if (pattrib->encrypt == _TKIP_) {
 367                 /*encode mic code*/
 368                 if (stainfo != NULL) {
 369                         u8 null_key[16] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
 370                                            0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
 371                                            0x0, 0x0};
 372                         datalen = pattrib->pktlen - pattrib->hdrlen;
 373                         pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
 374                         if (bmcst) {
 375                                 if (!memcmp(psecuritypriv->XGrptxmickey
 376                                    [psecuritypriv->XGrpKeyid].skey,
 377                                    null_key, 16))
 378                                         return _FAIL;
 379                                 /*start to calculate the mic code*/
 380                                 r8712_secmicsetkey(&micdata,
 381                                          psecuritypriv->
 382                                          XGrptxmickey[psecuritypriv->
 383                                         XGrpKeyid].skey);
 384                         } else {
 385                                 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
 386                                             null_key, 16))
 387                                         return _FAIL;
 388                                 /* start to calculate the mic code */
 389                                 r8712_secmicsetkey(&micdata,
 390                                              &stainfo->tkiptxmickey.skey[0]);
 391                         }
 392                         if (pframe[1] & 1) {   /* ToDS==1 */
 393                                 r8712_secmicappend(&micdata,
 394                                                    &pframe[16], 6); /*DA*/
 395                                 if (pframe[1]&2)  /* From Ds==1 */
 396                                         r8712_secmicappend(&micdata,
 397                                                            &pframe[24], 6);
 398                                 else
 399                                         r8712_secmicappend(&micdata,
 400                                                            &pframe[10], 6);
 401                         } else {        /* ToDS==0 */
 402                                 r8712_secmicappend(&micdata,
 403                                                    &pframe[4], 6); /* DA */
 404                                 if (pframe[1]&2)  /* From Ds==1 */
 405                                         r8712_secmicappend(&micdata,
 406                                                            &pframe[16], 6);
 407                                 else
 408                                         r8712_secmicappend(&micdata,
 409                                                            &pframe[10], 6);
 410                         }
 411                         if (pqospriv->qos_option == 1)
 412                                         priority[0] = (u8)pxmitframe->
 413                                                       attrib.priority;
 414                         r8712_secmicappend(&micdata, &priority[0], 4);
 415                         payload = pframe;
 416                         for (curfragnum = 0; curfragnum < pattrib->nr_frags;
 417                              curfragnum++) {
 418                                 payload = (u8 *)RND4((addr_t)(payload));
 419                                 payload = payload+pattrib->
 420                                           hdrlen+pattrib->iv_len;
 421                                 if ((curfragnum + 1) == pattrib->nr_frags) {
 422                                         length = pattrib->last_txcmdsz -
 423                                                   pattrib->hdrlen -
 424                                                   pattrib->iv_len -
 425                                                   ((psecuritypriv->sw_encrypt)
 426                                                   ? pattrib->icv_len : 0);
 427                                         r8712_secmicappend(&micdata, payload,
 428                                                            length);
 429                                         payload = payload+length;
 430                                 } else{
 431                                         length = pxmitpriv->frag_len -
 432                                             pattrib->hdrlen-pattrib->iv_len -
 433                                             ((psecuritypriv->sw_encrypt) ?
 434                                             pattrib->icv_len : 0);
 435                                         r8712_secmicappend(&micdata, payload,
 436                                                            length);
 437                                         payload = payload + length +
 438                                                   pattrib->icv_len;
 439                                 }
 440                         }
 441                         r8712_secgetmic(&micdata, &(mic[0]));
 442                         /* add mic code  and add the mic code length in
 443                          * last_txcmdsz */
 444                         memcpy(payload, &(mic[0]), 8);
 445                         pattrib->last_txcmdsz += 8;
 446                         payload = payload-pattrib->last_txcmdsz + 8;
 447                 }
 448         }
 449         return _SUCCESS;
 450 }
 451
 452 static sint xmitframe_swencrypt(struct _adapter *padapter,
 453                                 struct xmit_frame *pxmitframe)
 454 {
 455         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 456
 457         if (pattrib->bswenc) {
 458                 switch (pattrib->encrypt) {
 459                 case _WEP40_:
 460                 case _WEP104_:
 461                         r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
 462                         break;
 463                 case _TKIP_:
 464                         r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
 465                         break;
 466                 case _AES_:
 467                         r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
 468                         break;
 469                 default:
 470                                 break;
 471                 }
 472         }
 473         return _SUCCESS;
 474 }
 475
 476 static sint make_wlanhdr(struct _adapter *padapter , u8 *hdr,
 477                          struct pkt_attrib *pattrib)
 478 {
 479         u16 *qc;
 480
 481         struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
 482         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 483         struct qos_priv *pqospriv = &pmlmepriv->qospriv;
 484         u16 *fctrl = &pwlanhdr->frame_ctl;
 485
 486         memset(hdr, 0, WLANHDR_OFFSET);
 487         SetFrameSubType(fctrl, pattrib->subtype);
 488         if (pattrib->subtype & WIFI_DATA_TYPE) {
 489                 if ((check_fwstate(pmlmepriv,  WIFI_STATION_STATE) == true)) {
 490                         /* to_ds = 1, fr_ds = 0; */
 491                         SetToDs(fctrl);
 492                         memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv),
 493                                 ETH_ALEN);
 494                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 495                         memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
 496                 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
 497                         /* to_ds = 0, fr_ds = 1; */
 498                         SetFrDs(fctrl);
 499                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 500                         memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv),
 501                                 ETH_ALEN);
 502                         memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);
 503                 } else if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true)
 504                            || (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)
 505                            == true)) {
 506                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 507                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 508                         memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
 509                                 ETH_ALEN);
 510                 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
 511                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 512                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 513                         memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
 514                                 ETH_ALEN);
 515                 } else
 516                         return _FAIL;
 517
 518                 if (pattrib->encrypt)
 519                         SetPrivacy(fctrl);
 520                 if (pqospriv->qos_option) {
 521                         qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
 522                         if (pattrib->priority)
 523                                 SetPriority(qc, pattrib->priority);
 524                         SetAckpolicy(qc, pattrib->ack_policy);
 525                 }
 526                 /* TODO: fill HT Control Field */
 527                 /* Update Seq Num will be handled by f/w */
 528                 {
 529                         struct sta_info *psta;
 530                         sint bmcst = IS_MCAST(pattrib->ra);
 531
 532                         if (pattrib->psta)
 533                                 psta = pattrib->psta;
 534                         else {
 535                                 if (bmcst)
 536                                         psta = r8712_get_bcmc_stainfo(padapter);
 537                                 else
 538                                         psta =
 539                                          r8712_get_stainfo(&padapter->stapriv,
 540                                          pattrib->ra);
 541                         }
 542                         if (psta) {
 543                                 psta->sta_xmitpriv.txseq_tid
 544                                                   [pattrib->priority]++;
 545                                 psta->sta_xmitpriv.txseq_tid[pattrib->priority]
 546                                                    &= 0xFFF;
 547                                 pattrib->seqnum = psta->sta_xmitpriv.
 548                                                   txseq_tid[pattrib->priority];
 549                                 SetSeqNum(hdr, pattrib->seqnum);
 550                         }
 551                 }
 552         }
 553         return _SUCCESS;
 554 }
 555
 556 static sint r8712_put_snap(u8 *data, u16 h_proto)
 557 {
 558         struct ieee80211_snap_hdr *snap;
 559         const u8 *oui;
 560
 561         snap = (struct ieee80211_snap_hdr *)data;
 562         snap->dsap = 0xaa;
 563         snap->ssap = 0xaa;
 564         snap->ctrl = 0x03;
 565         if (h_proto == 0x8137 || h_proto == 0x80f3)
 566                 oui = P802_1H_OUI;
 567         else
 568                 oui = RFC1042_OUI;
 569         snap->oui[0] = oui[0];
 570         snap->oui[1] = oui[1];
 571         snap->oui[2] = oui[2];
 572         *(u16 *)(data + SNAP_SIZE) = htons(h_proto);
 573         return SNAP_SIZE + sizeof(u16);
 574 }
 575
 576 /*
 577  * This sub-routine will perform all the following:
 578  * 1. remove 802.3 header.
 579  * 2. create wlan_header, based on the info in pxmitframe
 580  * 3. append sta's iv/ext-iv
 581  * 4. append LLC
 582  * 5. move frag chunk from pframe to pxmitframe->mem
 583  * 6. apply sw-encrypt, if necessary.
 584  */
 585 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
 586                         struct xmit_frame *pxmitframe)
 587 {
 588         struct pkt_file pktfile;
 589
 590         sint    frg_len, mpdu_len, llc_sz;
 591         u32     mem_sz;
 592         u8      frg_inx;
 593         addr_t addr;
 594         u8 *pframe, *mem_start, *ptxdesc;
 595         struct sta_info         *psta;
 596         struct security_priv    *psecuritypriv = &padapter->securitypriv;
 597         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 598         struct xmit_priv        *pxmitpriv = &padapter->xmitpriv;
 599         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 600         u8 *pbuf_start;
 601         sint bmcst = IS_MCAST(pattrib->ra);
 602
 603         if (pattrib->psta == NULL)
 604                 return _FAIL;
 605         psta = pattrib->psta;
 606         if (pxmitframe->buf_addr == NULL)
 607                 return _FAIL;
 608         pbuf_start = pxmitframe->buf_addr;
 609         ptxdesc = pbuf_start;
 610         mem_start = pbuf_start + TXDESC_OFFSET;
 611         if (make_wlanhdr(padapter, mem_start, pattrib) == _FAIL)
 612                 return _FAIL;
 613         _r8712_open_pktfile(pkt, &pktfile);
 614         _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
 615         if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
 616                 /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
 617                 if (pattrib->ether_type == 0x8712) {
 618                         /* take care -  update_txdesc overwrite this */
 619                         _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
 620                 }
 621         }
 622         pattrib->pktlen = pktfile.pkt_len;
 623         frg_inx = 0;
 624         frg_len = pxmitpriv->frag_len - 4;
 625         while (1) {
 626                 llc_sz = 0;
 627                 mpdu_len = frg_len;
 628                 pframe = mem_start;
 629                 SetMFrag(mem_start);
 630                 pframe += pattrib->hdrlen;
 631                 mpdu_len -= pattrib->hdrlen;
 632                 /* adding icv, if necessary...*/
 633                 if (pattrib->iv_len) {
 634                         if (psta != NULL) {
 635                                 switch (pattrib->encrypt) {
 636                                 case _WEP40_:
 637                                 case _WEP104_:
 638                                         WEP_IV(pattrib->iv, psta->txpn,
 639                                                (u8)psecuritypriv->
 640                                                PrivacyKeyIndex);
 641                                         break;
 642                                 case _TKIP_:
 643                                         if (bmcst)
 644                                                 TKIP_IV(pattrib->iv,
 645                                                     psta->txpn,
 646                                                     (u8)psecuritypriv->
 647                                                     XGrpKeyid);
 648                                         else
 649                                                 TKIP_IV(pattrib->iv, psta->txpn,
 650                                                         0);
 651                                         break;
 652                                 case _AES_:
 653                                         if (bmcst)
 654                                                 AES_IV(pattrib->iv, psta->txpn,
 655                                                     (u8)psecuritypriv->
 656                                                     XGrpKeyid);
 657                                         else
 658                                                 AES_IV(pattrib->iv, psta->txpn,
 659                                                        0);
 660                                         break;
 661                                 }
 662                         }
 663                         memcpy(pframe, pattrib->iv, pattrib->iv_len);
 664                         pframe += pattrib->iv_len;
 665                         mpdu_len -= pattrib->iv_len;
 666                 }
 667                 if (frg_inx == 0) {
 668                         llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
 669                         pframe += llc_sz;
 670                         mpdu_len -= llc_sz;
 671                 }
 672                 if ((pattrib->icv_len > 0) && (pattrib->bswenc))
 673                         mpdu_len -= pattrib->icv_len;
 674                 if (bmcst)
 675                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 676                                  pattrib->pktlen);
 677                 else
 678                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 679                                  mpdu_len);
 680                 pframe += mem_sz;
 681                 if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
 682                         memcpy(pframe, pattrib->icv, pattrib->icv_len);
 683                         pframe += pattrib->icv_len;
 684                 }
 685                 frg_inx++;
 686                 if (bmcst || (r8712_endofpktfile(&pktfile) == true)) {
 687                         pattrib->nr_frags = frg_inx;
 688                         pattrib->last_txcmdsz = pattrib->hdrlen +
 689                                                 pattrib->iv_len +
 690                                                 ((pattrib->nr_frags == 1) ?
 691                                                 llc_sz : 0) +
 692                                                 ((pattrib->bswenc) ?
 693                                                 pattrib->icv_len : 0) + mem_sz;
 694                         ClearMFrag(mem_start);
 695                         break;
 696                 }
 697                 addr = (addr_t)(pframe);
 698                 mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
 699                 memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
 700         }
 701
 702         if (xmitframe_addmic(padapter, pxmitframe) == _FAIL)
 703                 return _FAIL;
 704         xmitframe_swencrypt(padapter, pxmitframe);
 705         return _SUCCESS;
 706 }
 707
 708 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
 709 {
 710         uint    protection;
 711         u8      *perp;
 712         sint     erp_len;
 713         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 714         struct  registry_priv *pregistrypriv = &padapter->registrypriv;
 715
 716         switch (pxmitpriv->vcs_setting) {
 717         case DISABLE_VCS:
 718                 pxmitpriv->vcs = NONE_VCS;
 719                 break;
 720         case ENABLE_VCS:
 721                 break;
 722         case AUTO_VCS:
 723         default:
 724                 perp = r8712_get_ie(ie, _ERPINFO_IE_, &erp_len, ie_len);
 725                 if (perp == NULL)
 726                         pxmitpriv->vcs = NONE_VCS;
 727                 else {
 728                         protection = (*(perp + 2)) & BIT(1);
 729                         if (protection) {
 730                                 if (pregistrypriv->vcs_type == RTS_CTS)
 731                                         pxmitpriv->vcs = RTS_CTS;
 732                                 else
 733                                         pxmitpriv->vcs = CTS_TO_SELF;
 734                         } else
 735                                 pxmitpriv->vcs = NONE_VCS;
 736                 }
 737                 break;
 738         }
 739 }
 740
 741 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
 742 {
 743         unsigned long irqL;
 744         struct xmit_buf *pxmitbuf =  NULL;
 745         struct list_head *plist, *phead;
 746         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 747
 748         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 749         if (list_empty(&pfree_xmitbuf_queue->queue))
 750                 pxmitbuf = NULL;
 751         else {
 752                 phead = &pfree_xmitbuf_queue->queue;
 753                 plist = phead->next;
 754                 pxmitbuf = LIST_CONTAINOR(plist, struct xmit_buf, list);
 755                 list_del_init(&(pxmitbuf->list));
 756         }
 757         if (pxmitbuf !=  NULL)
 758                 pxmitpriv->free_xmitbuf_cnt--;
 759         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 760         return pxmitbuf;
 761 }
 762
 763 int r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
 764 {
 765         unsigned long irqL;
 766         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 767
 768         if (pxmitbuf == NULL)
 769                 return _FAIL;
 770         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 771         list_del_init(&pxmitbuf->list);
 772         list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
 773         pxmitpriv->free_xmitbuf_cnt++;
 774         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 775         return _SUCCESS;
 776 }
 777
 778 /*
 779 Calling context:
 780 1. OS_TXENTRY
 781 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
 782
 783 If we turn on USE_RXTHREAD, then, no need for critical section.
 784 Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
 785
 786 Must be very very cautious...
 787
 788 */
 789
 790 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
 791 {
 792         /*
 793                 Please remember to use all the osdep_service api,
 794                 and lock/unlock or _enter/_exit critical to protect
 795                 pfree_xmit_queue
 796         */
 797         unsigned long irqL;
 798         struct xmit_frame *pxframe = NULL;
 799         struct list_head *plist, *phead;
 800         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 801
 802         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 803         if (list_empty(&pfree_xmit_queue->queue))
 804                 pxframe =  NULL;
 805         else {
 806                 phead = &pfree_xmit_queue->queue;
 807                 plist = phead->next;
 808                 pxframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
 809                 list_del_init(&(pxframe->list));
 810         }
 811         if (pxframe !=  NULL) {
 812                 pxmitpriv->free_xmitframe_cnt--;
 813                 pxframe->buf_addr = NULL;
 814                 pxframe->pxmitbuf = NULL;
 815                 pxframe->attrib.psta = NULL;
 816                 pxframe->pkt = NULL;
 817         }
 818         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 819         return pxframe;
 820 }
 821
 822 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
 823                           struct xmit_frame *pxmitframe)
 824 {
 825         unsigned long irqL;
 826         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 827         struct _adapter *padapter = pxmitpriv->adapter;
 828         struct sk_buff *pndis_pkt = NULL;
 829
 830         if (pxmitframe == NULL)
 831                 return;
 832         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 833         list_del_init(&pxmitframe->list);
 834         if (pxmitframe->pkt) {
 835                 pndis_pkt = pxmitframe->pkt;
 836                 pxmitframe->pkt = NULL;
 837         }
 838         list_add_tail(&pxmitframe->list, &pfree_xmit_queue->queue);
 839         pxmitpriv->free_xmitframe_cnt++;
 840         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 841         if (netif_queue_stopped(padapter->pnetdev))
 842                 netif_wake_queue(padapter->pnetdev);
 843 }
 844
 845 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
 846                       struct xmit_frame *pxmitframe)
 847 {
 848         if (pxmitframe == NULL)
 849                 return;
 850         if (pxmitframe->frame_tag == DATA_FRAMETAG)
 851                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 852 }
 853
 854 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
 855                                 struct  __queue *pframequeue)
 856 {
 857         unsigned long irqL;
 858         struct list_head *plist, *phead;
 859         struct  xmit_frame      *pxmitframe;
 860
 861         spin_lock_irqsave(&(pframequeue->lock), irqL);
 862         phead = &pframequeue->queue;
 863         plist = phead->next;
 864         while (end_of_queue_search(phead, plist) == false) {
 865                 pxmitframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
 866                 plist = plist->next;
 867                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 868         }
 869         spin_unlock_irqrestore(&(pframequeue->lock), irqL);
 870 }
 871
 872 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
 873                                                struct  __queue **ppstapending,
 874                                                struct sta_info *psta, sint up)
 875 {
 876
 877         struct tx_servq *ptxservq;
 878         struct hw_xmit *phwxmits =  padapter->xmitpriv.hwxmits;
 879
 880         switch (up) {
 881         case 1:
 882         case 2:
 883                 ptxservq = &(psta->sta_xmitpriv.bk_q);
 884                 *ppstapending = &padapter->xmitpriv.bk_pending;
 885                 (phwxmits+3)->accnt++;
 886                 break;
 887         case 4:
 888         case 5:
 889                 ptxservq = &(psta->sta_xmitpriv.vi_q);
 890                 *ppstapending = &padapter->xmitpriv.vi_pending;
 891                 (phwxmits+1)->accnt++;
 892                 break;
 893         case 6:
 894         case 7:
 895                 ptxservq = &(psta->sta_xmitpriv.vo_q);
 896                 *ppstapending = &padapter->xmitpriv.vo_pending;
 897                 (phwxmits+0)->accnt++;
 898                 break;
 899         case 0:
 900         case 3:
 901         default:
 902                 ptxservq = &(psta->sta_xmitpriv.be_q);
 903                 *ppstapending = &padapter->xmitpriv.be_pending;
 904                 (phwxmits + 2)->accnt++;
 905                 break;
 906         }
 907         return ptxservq;
 908 }
 909
 910 /*
 911  * Will enqueue pxmitframe to the proper queue, and indicate it
 912  * to xx_pending list.....
 913  */
 914 sint r8712_xmit_classifier(struct _adapter *padapter,
 915                            struct xmit_frame *pxmitframe)
 916 {
 917         unsigned long irqL0;
 918         struct  __queue *pstapending;
 919         struct sta_info *psta;
 920         struct tx_servq *ptxservq;
 921         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 922         struct sta_priv *pstapriv = &padapter->stapriv;
 923         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 924         sint bmcst = IS_MCAST(pattrib->ra);
 925
 926         if (pattrib->psta)
 927                 psta = pattrib->psta;
 928         else {
 929                 if (bmcst)
 930                         psta = r8712_get_bcmc_stainfo(padapter);
 931                 else {
 932                         if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
 933                                 psta = r8712_get_stainfo(pstapriv,
 934                                        get_bssid(pmlmepriv));
 935                         else
 936                                 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 937                 }
 938         }
 939         if (psta == NULL)
 940                 return _FAIL;
 941         ptxservq = get_sta_pending(padapter, &pstapending,
 942                    psta, pattrib->priority);
 943         spin_lock_irqsave(&pstapending->lock, irqL0);
 944         if (list_empty(&ptxservq->tx_pending))
 945                 list_add_tail(&ptxservq->tx_pending, &pstapending->queue);
 946         list_add_tail(&pxmitframe->list, &ptxservq->sta_pending.queue);
 947         ptxservq->qcnt++;
 948         spin_unlock_irqrestore(&pstapending->lock, irqL0);
 949         return _SUCCESS;
 950 }
 951
 952 static void alloc_hwxmits(struct _adapter *padapter)
 953 {
 954         struct hw_xmit *hwxmits;
 955         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 956
 957         pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
 958         pxmitpriv->hwxmits = kmalloc_array(pxmitpriv->hwxmit_entry,
 959                                 sizeof(struct hw_xmit), GFP_ATOMIC);
 960         if (pxmitpriv->hwxmits == NULL)
 961                 return;
 962         hwxmits = pxmitpriv->hwxmits;
 963         if (pxmitpriv->hwxmit_entry == 5) {
 964                 pxmitpriv->bmc_txqueue.head = 0;
 965                 hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
 966                 hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
 967                 pxmitpriv->vo_txqueue.head = 0;
 968                 hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
 969                 hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
 970         pxmitpriv->vi_txqueue.head = 0;
 971                 hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
 972                 hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
 973                 pxmitpriv->bk_txqueue.head = 0;
 974                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 975                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 976                 pxmitpriv->be_txqueue.head = 0;
 977                 hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
 978                 hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
 979         } else if (pxmitpriv->hwxmit_entry == 4) {
 980                 pxmitpriv->vo_txqueue.head = 0;
 981                 hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
 982                 hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
 983                 pxmitpriv->vi_txqueue.head = 0;
 984                 hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
 985                 hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
 986                 pxmitpriv->be_txqueue.head = 0;
 987                 hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
 988                 hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
 989                 pxmitpriv->bk_txqueue.head = 0;
 990                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 991                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 992         }
 993 }
 994
 995 static void free_hwxmits(struct _adapter *padapter)
 996 {
 997         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 998
 999         kfree(pxmitpriv->hwxmits);
1000 }
1001
1002 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
1003 {
1004         sint i;
1005
1006         for (i = 0; i < entry; i++, phwxmit++) {
1007                 spin_lock_init(&phwxmit->xmit_lock);
1008                 INIT_LIST_HEAD(&phwxmit->pending);
1009                 phwxmit->txcmdcnt = 0;
1010                 phwxmit->accnt = 0;
1011         }
1012 }
1013
1014 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
1015                         struct xmit_buf *pxmitbuf)
1016 {
1017         /* pxmitbuf attach to pxmitframe */
1018         pxmitframe->pxmitbuf = pxmitbuf;
1019         /* urb and irp connection */
1020         pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
1021         /* buffer addr assoc */
1022         pxmitframe->buf_addr = pxmitbuf->pbuf;
1023         /* pxmitframe attach to pxmitbuf */
1024         pxmitbuf->priv_data = pxmitframe;
1025 }
1026
1027 /*
1028  * tx_action == 0 == no frames to transmit
1029  * tx_action > 0 ==> we have frames to transmit
1030  * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1031  *                                               to transmit 1 frame.
1032  */
1033
1034 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1035 {
1036         unsigned long irqL;
1037         int ret;
1038         struct xmit_buf *pxmitbuf = NULL;
1039         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1040         struct pkt_attrib *pattrib = &pxmitframe->attrib;
1041
1042         r8712_do_queue_select(padapter, pattrib);
1043         spin_lock_irqsave(&pxmitpriv->lock, irqL);
1044         if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1045                 ret = false;
1046                 r8712_xmit_enqueue(padapter, pxmitframe);
1047                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1048                 return ret;
1049         }
1050         pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1051         if (pxmitbuf == NULL) { /*enqueue packet*/
1052                 ret = false;
1053                 r8712_xmit_enqueue(padapter, pxmitframe);
1054                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1055         } else { /*dump packet directly*/
1056                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1057                 ret = true;
1058                 xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1059                 r8712_xmit_direct(padapter, pxmitframe);
1060         }
1061         return ret;
1062 }