drivers/staging/rtl8712/rtl871x_xmit.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  * rtl871x_xmit.c
   4  *
   5  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
   6  * Linux device driver for RTL8192SU
   7  *
   8  * Modifications for inclusion into the Linux staging tree are
   9  * Copyright(c) 2010 Larry Finger. All rights reserved.
  10  *
  11  * Contact information:
  12  * WLAN FAE <wlanfae@realtek.com>
  13  * Larry Finger <Larry.Finger@lwfinger.net>
  14  *
  15  ******************************************************************************/
  16
  17 #define _RTL871X_XMIT_C_
  18
  19 #include "osdep_service.h"
  20 #include "drv_types.h"
  21 #include "osdep_intf.h"
  22 #include "usb_ops.h"
  23
  24 #include <linux/usb.h>
  25 #include <linux/ieee80211.h>
  26
  27 static const u8 P802_1H_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0xf8};
  28 static const u8 RFC1042_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0x00};
  29 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry);
  30 static void alloc_hwxmits(struct _adapter *padapter);
  31 static void free_hwxmits(struct _adapter *padapter);
  32
  33 static void _init_txservq(struct tx_servq *ptxservq)
  34 {
  35         INIT_LIST_HEAD(&ptxservq->tx_pending);
  36         _init_queue(&ptxservq->sta_pending);
  37         ptxservq->qcnt = 0;
  38 }
  39
  40 void _r8712_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv)
  41 {
  42         memset((unsigned char *)psta_xmitpriv, 0,
  43                  sizeof(struct sta_xmit_priv));
  44         spin_lock_init(&psta_xmitpriv->lock);
  45         _init_txservq(&psta_xmitpriv->be_q);
  46         _init_txservq(&psta_xmitpriv->bk_q);
  47         _init_txservq(&psta_xmitpriv->vi_q);
  48         _init_txservq(&psta_xmitpriv->vo_q);
  49         INIT_LIST_HEAD(&psta_xmitpriv->legacy_dz);
  50         INIT_LIST_HEAD(&psta_xmitpriv->apsd);
  51 }
  52
  53 int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
  54                           struct _adapter *padapter)
  55 {
  56         sint i;
  57         struct xmit_buf *pxmitbuf;
  58         struct xmit_frame *pxframe;
  59         int j;
  60
  61         memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv));
  62         spin_lock_init(&pxmitpriv->lock);
  63         /*
  64          *Please insert all the queue initialization using _init_queue below
  65          */
  66         pxmitpriv->adapter = padapter;
  67         _init_queue(&pxmitpriv->be_pending);
  68         _init_queue(&pxmitpriv->bk_pending);
  69         _init_queue(&pxmitpriv->vi_pending);
  70         _init_queue(&pxmitpriv->vo_pending);
  71         _init_queue(&pxmitpriv->bm_pending);
  72         _init_queue(&pxmitpriv->legacy_dz_queue);
  73         _init_queue(&pxmitpriv->apsd_queue);
  74         _init_queue(&pxmitpriv->free_xmit_queue);
  75         /*
  76          * Please allocate memory with sz = (struct xmit_frame) * NR_XMITFRAME,
  77          * and initialize free_xmit_frame below.
  78          * Please also apply  free_txobj to link_up all the xmit_frames...
  79          */
  80         pxmitpriv->pallocated_frame_buf =
  81                 kmalloc(NR_XMITFRAME * sizeof(struct xmit_frame) + 4,
  82                         GFP_ATOMIC);
  83         if (!pxmitpriv->pallocated_frame_buf) {
  84                 pxmitpriv->pxmit_frame_buf = NULL;
  85                 return -ENOMEM;
  86         }
  87         pxmitpriv->pxmit_frame_buf = pxmitpriv->pallocated_frame_buf + 4 -
  88                         ((addr_t) (pxmitpriv->pallocated_frame_buf) & 3);
  89         pxframe = (struct xmit_frame *) pxmitpriv->pxmit_frame_buf;
  90         for (i = 0; i < NR_XMITFRAME; i++) {
  91                 INIT_LIST_HEAD(&(pxframe->list));
  92                 pxframe->padapter = padapter;
  93                 pxframe->frame_tag = DATA_FRAMETAG;
  94                 pxframe->pkt = NULL;
  95                 pxframe->buf_addr = NULL;
  96                 pxframe->pxmitbuf = NULL;
  97                 list_add_tail(&(pxframe->list),
  98                                  &(pxmitpriv->free_xmit_queue.queue));
  99                 pxframe++;
 100         }
 101         pxmitpriv->free_xmitframe_cnt = NR_XMITFRAME;
 102         /*
 103          * init xmit hw_txqueue
 104          */
 105         _r8712_init_hw_txqueue(&pxmitpriv->be_txqueue, BE_QUEUE_INX);
 106         _r8712_init_hw_txqueue(&pxmitpriv->bk_txqueue, BK_QUEUE_INX);
 107         _r8712_init_hw_txqueue(&pxmitpriv->vi_txqueue, VI_QUEUE_INX);
 108         _r8712_init_hw_txqueue(&pxmitpriv->vo_txqueue, VO_QUEUE_INX);
 109         _r8712_init_hw_txqueue(&pxmitpriv->bmc_txqueue, BMC_QUEUE_INX);
 110         pxmitpriv->frag_len = MAX_FRAG_THRESHOLD;
 111         pxmitpriv->txirp_cnt = 1;
 112         /*per AC pending irp*/
 113         pxmitpriv->beq_cnt = 0;
 114         pxmitpriv->bkq_cnt = 0;
 115         pxmitpriv->viq_cnt = 0;
 116         pxmitpriv->voq_cnt = 0;
 117         /*init xmit_buf*/
 118         _init_queue(&pxmitpriv->free_xmitbuf_queue);
 119         _init_queue(&pxmitpriv->pending_xmitbuf_queue);
 120         pxmitpriv->pallocated_xmitbuf =
 121                 kmalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4, GFP_ATOMIC);
 122         if (!pxmitpriv->pallocated_xmitbuf)
 123                 goto clean_up_frame_buf;
 124         pxmitpriv->pxmitbuf = pxmitpriv->pallocated_xmitbuf + 4 -
 125                               ((addr_t)(pxmitpriv->pallocated_xmitbuf) & 3);
 126         pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
 127         for (i = 0; i < NR_XMITBUFF; i++) {
 128                 INIT_LIST_HEAD(&pxmitbuf->list);
 129                 pxmitbuf->pallocated_buf =
 130                         kmalloc(MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ, GFP_ATOMIC);
 131                 if (!pxmitbuf->pallocated_buf) {
 132                         j = 0;
 133                         goto clean_up_alloc_buf;
 134                 }
 135                 pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
 136                                  ((addr_t) (pxmitbuf->pallocated_buf) &
 137                                  (XMITBUF_ALIGN_SZ - 1));
 138                 if (r8712_xmit_resource_alloc(padapter, pxmitbuf)) {
 139                         j = 1;
 140                         goto clean_up_alloc_buf;
 141                 }
 142                 list_add_tail(&pxmitbuf->list,
 143                                  &(pxmitpriv->free_xmitbuf_queue.queue));
 144                 pxmitbuf++;
 145         }
 146         pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF;
 147         INIT_WORK(&padapter->wk_filter_rx_ff0, r8712_SetFilter);
 148         alloc_hwxmits(padapter);
 149         init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
 150         tasklet_setup(&pxmitpriv->xmit_tasklet, r8712_xmit_bh);
 151         return 0;
 152
 153 clean_up_alloc_buf:
 154         if (j) {
 155                 /* failure happened in r8712_xmit_resource_alloc()
 156                  * delete extra pxmitbuf->pallocated_buf
 157                  */
 158                 kfree(pxmitbuf->pallocated_buf);
 159         }
 160         for (j = 0; j < i; j++) {
 161                 int k;
 162
 163                 pxmitbuf--;                     /* reset pointer */
 164                 kfree(pxmitbuf->pallocated_buf);
 165                 for (k = 0; k < 8; k++)         /* delete xmit urb's */
 166                         usb_free_urb(pxmitbuf->pxmit_urb[k]);
 167         }
 168         kfree(pxmitpriv->pallocated_xmitbuf);
 169         pxmitpriv->pallocated_xmitbuf = NULL;
 170 clean_up_frame_buf:
 171         kfree(pxmitpriv->pallocated_frame_buf);
 172         pxmitpriv->pallocated_frame_buf = NULL;
 173         return -ENOMEM;
 174 }
 175
 176 void _free_xmit_priv(struct xmit_priv *pxmitpriv)
 177 {
 178         int i;
 179         struct _adapter *padapter = pxmitpriv->adapter;
 180         struct xmit_frame *pxmitframe = (struct xmit_frame *)
 181                                         pxmitpriv->pxmit_frame_buf;
 182         struct xmit_buf *pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
 183
 184         if (!pxmitpriv->pxmit_frame_buf)
 185                 return;
 186         for (i = 0; i < NR_XMITFRAME; i++) {
 187                 r8712_xmit_complete(padapter, pxmitframe);
 188                 pxmitframe++;
 189         }
 190         for (i = 0; i < NR_XMITBUFF; i++) {
 191                 r8712_xmit_resource_free(padapter, pxmitbuf);
 192                 kfree(pxmitbuf->pallocated_buf);
 193                 pxmitbuf++;
 194         }
 195         kfree(pxmitpriv->pallocated_frame_buf);
 196         kfree(pxmitpriv->pallocated_xmitbuf);
 197         free_hwxmits(padapter);
 198 }
 199
 200 int r8712_update_attrib(struct _adapter *padapter, _pkt *pkt,
 201                         struct pkt_attrib *pattrib)
 202 {
 203         struct pkt_file pktfile;
 204         struct sta_info *psta = NULL;
 205         struct ethhdr etherhdr;
 206
 207         struct tx_cmd txdesc;
 208
 209         bool bmcast;
 210         struct sta_priv         *pstapriv = &padapter->stapriv;
 211         struct security_priv    *psecuritypriv = &padapter->securitypriv;
 212         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 213         struct qos_priv         *pqospriv = &pmlmepriv->qospriv;
 214
 215         _r8712_open_pktfile(pkt, &pktfile);
 216
 217         _r8712_pktfile_read(&pktfile, (unsigned char *)&etherhdr, ETH_HLEN);
 218
 219         pattrib->ether_type = ntohs(etherhdr.h_proto);
 220
 221         /*
 222          * If driver xmit ARP packet, driver can set ps mode to initial
 223          * setting. It stands for getting DHCP or fix IP.
 224          */
 225         if (pattrib->ether_type == 0x0806) {
 226                 if (padapter->pwrctrlpriv.pwr_mode !=
 227                     padapter->registrypriv.power_mgnt) {
 228                         del_timer_sync(&pmlmepriv->dhcp_timer);
 229                         r8712_set_ps_mode(padapter,
 230                                           padapter->registrypriv.power_mgnt,
 231                                           padapter->registrypriv.smart_ps);
 232                 }
 233         }
 234
 235         memcpy(pattrib->dst, &etherhdr.h_dest, ETH_ALEN);
 236         memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);
 237         pattrib->pctrl = 0;
 238         if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
 239             check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
 240                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 241                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 242         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 243                 memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
 244                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 245         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 246                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 247                 memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
 248         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 249                 /*firstly, filter packet not belongs to mp*/
 250                 if (pattrib->ether_type != 0x8712)
 251                         return -EINVAL;
 252                 /* for mp storing the txcmd per packet,
 253                  * according to the info of txcmd to update pattrib
 254                  */
 255                 /*get MP_TXDESC_SIZE bytes txcmd per packet*/
 256                 _r8712_pktfile_read(&pktfile, (u8 *)&txdesc, TXDESC_SIZE);
 257                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 258                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 259                 pattrib->pctrl = 1;
 260         }
 261         /* r8712_xmitframe_coalesce() overwrite this!*/
 262         pattrib->pktlen = pktfile.pkt_len;
 263         if (pattrib->ether_type == ETH_P_IP) {
 264                 /* The following is for DHCP and ARP packet, we use cck1M to
 265                  * tx these packets and let LPS awake some time
 266                  * to prevent DHCP protocol fail
 267                  */
 268                 u8 tmp[24];
 269
 270                 _r8712_pktfile_read(&pktfile, &tmp[0], 24);
 271                 pattrib->dhcp_pkt = 0;
 272                 if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
 273                         if (pattrib->ether_type == ETH_P_IP) {/* IP header*/
 274                                 if (((tmp[21] == 68) && (tmp[23] == 67)) ||
 275                                         ((tmp[21] == 67) && (tmp[23] == 68))) {
 276                                         /* 68 : UDP BOOTP client
 277                                          * 67 : UDP BOOTP server
 278                                          * Use low rate to send DHCP packet.
 279                                          */
 280                                         pattrib->dhcp_pkt = 1;
 281                                 }
 282                         }
 283                 }
 284         }
 285         bmcast = is_multicast_ether_addr(pattrib->ra);
 286         /* get sta_info*/
 287         if (bmcast) {
 288                 psta = r8712_get_bcmc_stainfo(padapter);
 289                 pattrib->mac_id = 4;
 290         } else {
 291                 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 292                         psta = r8712_get_stainfo(pstapriv,
 293                                                  get_bssid(pmlmepriv));
 294                         pattrib->mac_id = 5;
 295                 } else {
 296                         psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 297                         if (!psta)  /* drop the pkt */
 298                                 return -ENOMEM;
 299                         if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
 300                                 pattrib->mac_id = 5;
 301                         else
 302                                 pattrib->mac_id = psta->mac_id;
 303                 }
 304         }
 305
 306         if (psta) {
 307                 pattrib->psta = psta;
 308         } else {
 309                 /* if we cannot get psta => drrp the pkt */
 310                 return -ENOMEM;
 311         }
 312
 313         pattrib->ack_policy = 0;
 314         /* get ether_hdr_len */
 315         pattrib->pkt_hdrlen = ETH_HLEN;
 316
 317         if (pqospriv->qos_option) {
 318                 r8712_set_qos(&pktfile, pattrib);
 319         } else {
 320                 pattrib->hdrlen = WLAN_HDR_A3_LEN;
 321                 pattrib->subtype = IEEE80211_FTYPE_DATA;
 322                 pattrib->priority = 0;
 323         }
 324         if (psta->ieee8021x_blocked) {
 325                 pattrib->encrypt = 0;
 326                 if ((pattrib->ether_type != 0x888e) &&
 327                     !check_fwstate(pmlmepriv, WIFI_MP_STATE))
 328                         return -EINVAL;
 329         } else {
 330                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
 331         }
 332         switch (pattrib->encrypt) {
 333         case _WEP40_:
 334         case _WEP104_:
 335                 pattrib->iv_len = 4;
 336                 pattrib->icv_len = 4;
 337                 break;
 338         case _TKIP_:
 339                 pattrib->iv_len = 8;
 340                 pattrib->icv_len = 4;
 341                 if (padapter->securitypriv.busetkipkey == _FAIL)
 342                         return -EINVAL;
 343                 break;
 344         case _AES_:
 345                 pattrib->iv_len = 8;
 346                 pattrib->icv_len = 8;
 347                 break;
 348         default:
 349                 pattrib->iv_len = 0;
 350                 pattrib->icv_len = 0;
 351                 break;
 352         }
 353
 354         if (pattrib->encrypt &&
 355             (padapter->securitypriv.sw_encrypt ||
 356             !psecuritypriv->hw_decrypted))
 357                 pattrib->bswenc = true;
 358         else
 359                 pattrib->bswenc = false;
 360         /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
 361          * some settings above.
 362          */
 363         if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
 364                 pattrib->priority =
 365                     (le32_to_cpu(txdesc.txdw1) >> QSEL_SHT) & 0x1f;
 366         return 0;
 367 }
 368
 369 static int xmitframe_addmic(struct _adapter *padapter,
 370                             struct xmit_frame *pxmitframe)
 371 {
 372         u32     curfragnum, length;
 373         u8      *pframe, *payload, mic[8];
 374         struct  mic_data micdata;
 375         struct  sta_info *stainfo;
 376         struct  qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
 377         struct  pkt_attrib  *pattrib = &pxmitframe->attrib;
 378         struct  security_priv *psecpriv = &padapter->securitypriv;
 379         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 380         u8 priority[4] = {};
 381         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 382
 383         if (pattrib->psta)
 384                 stainfo = pattrib->psta;
 385         else
 386                 stainfo = r8712_get_stainfo(&padapter->stapriv,
 387                                             &pattrib->ra[0]);
 388         if (pattrib->encrypt == _TKIP_) {
 389                 /*encode mic code*/
 390                 if (stainfo) {
 391                         u8 null_key[16] = {};
 392
 393                         pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
 394                         if (bmcst) {
 395                                 if (!memcmp(psecpriv->XGrptxmickey
 396                                    [psecpriv->XGrpKeyid].skey,
 397                                    null_key, 16))
 398                                         return -ENOMEM;
 399                                 /*start to calculate the mic code*/
 400                                 r8712_secmicsetkey(&micdata,
 401                                         psecpriv->XGrptxmickey
 402                                         [psecpriv->XGrpKeyid].skey);
 403                         } else {
 404                                 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
 405                                             null_key, 16))
 406                                         return -ENOMEM;
 407                                 /* start to calculate the mic code */
 408                                 r8712_secmicsetkey(&micdata,
 409                                              &stainfo->tkiptxmickey.skey[0]);
 410                         }
 411                         if (pframe[1] & 1) {   /* ToDS==1 */
 412                                 r8712_secmicappend(&micdata,
 413                                                    &pframe[16], 6); /*DA*/
 414                                 if (pframe[1] & 2)  /* From Ds==1 */
 415                                         r8712_secmicappend(&micdata,
 416                                                            &pframe[24], 6);
 417                                 else
 418                                         r8712_secmicappend(&micdata,
 419                                                            &pframe[10], 6);
 420                         } else {        /* ToDS==0 */
 421                                 r8712_secmicappend(&micdata,
 422                                                    &pframe[4], 6); /* DA */
 423                                 if (pframe[1] & 2)  /* From Ds==1 */
 424                                         r8712_secmicappend(&micdata,
 425                                                            &pframe[16], 6);
 426                                 else
 427                                         r8712_secmicappend(&micdata,
 428                                                            &pframe[10], 6);
 429                         }
 430                         if (pqospriv->qos_option == 1)
 431                                 priority[0] = (u8)pxmitframe->attrib.priority;
 432                         r8712_secmicappend(&micdata, &priority[0], 4);
 433                         payload = pframe;
 434                         for (curfragnum = 0; curfragnum < pattrib->nr_frags;
 435                              curfragnum++) {
 436                                 payload = (u8 *)RND4((addr_t)(payload));
 437                                 payload += pattrib->hdrlen + pattrib->iv_len;
 438                                 if ((curfragnum + 1) == pattrib->nr_frags) {
 439                                         length = pattrib->last_txcmdsz -
 440                                                   pattrib->hdrlen -
 441                                                   pattrib->iv_len -
 442                                                   ((psecpriv->sw_encrypt)
 443                                                   ? pattrib->icv_len : 0);
 444                                         r8712_secmicappend(&micdata, payload,
 445                                                            length);
 446                                         payload = payload + length;
 447                                 } else {
 448                                         length = pxmitpriv->frag_len -
 449                                             pattrib->hdrlen - pattrib->iv_len -
 450                                             ((psecpriv->sw_encrypt) ?
 451                                             pattrib->icv_len : 0);
 452                                         r8712_secmicappend(&micdata, payload,
 453                                                            length);
 454                                         payload = payload + length +
 455                                                   pattrib->icv_len;
 456                                 }
 457                         }
 458                         r8712_secgetmic(&micdata, &(mic[0]));
 459                         /* add mic code  and add the mic code length in
 460                          * last_txcmdsz
 461                          */
 462                         memcpy(payload, &(mic[0]), 8);
 463                         pattrib->last_txcmdsz += 8;
 464                         payload = payload - pattrib->last_txcmdsz + 8;
 465                 }
 466         }
 467         return 0;
 468 }
 469
 470 static sint xmitframe_swencrypt(struct _adapter *padapter,
 471                                 struct xmit_frame *pxmitframe)
 472 {
 473         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 474
 475         if (pattrib->bswenc) {
 476                 switch (pattrib->encrypt) {
 477                 case _WEP40_:
 478                 case _WEP104_:
 479                         r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
 480                         break;
 481                 case _TKIP_:
 482                         r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
 483                         break;
 484                 case _AES_:
 485                         r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
 486                         break;
 487                 default:
 488                                 break;
 489                 }
 490         }
 491         return _SUCCESS;
 492 }
 493
 494 static int make_wlanhdr(struct _adapter *padapter, u8 *hdr,
 495                         struct pkt_attrib *pattrib)
 496 {
 497         u16 *qc;
 498
 499         struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
 500         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 501         struct qos_priv *pqospriv = &pmlmepriv->qospriv;
 502         __le16 *fctrl = &pwlanhdr->frame_control;
 503         u8 *bssid;
 504
 505         memset(hdr, 0, WLANHDR_OFFSET);
 506         SetFrameSubType(fctrl, pattrib->subtype);
 507         if (!(pattrib->subtype & IEEE80211_FTYPE_DATA))
 508                 return 0;
 509
 510         bssid = get_bssid(pmlmepriv);
 511
 512         if (check_fwstate(pmlmepriv,  WIFI_STATION_STATE)) {
 513                 /* to_ds = 1, fr_ds = 0; */
 514                 SetToDs(fctrl);
 515                 ether_addr_copy(pwlanhdr->addr1, bssid);
 516                 ether_addr_copy(pwlanhdr->addr2, pattrib->src);
 517                 ether_addr_copy(pwlanhdr->addr3, pattrib->dst);
 518         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 519                 /* to_ds = 0, fr_ds = 1; */
 520                 SetFrDs(fctrl);
 521                 ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
 522                 ether_addr_copy(pwlanhdr->addr2, bssid);
 523                 ether_addr_copy(pwlanhdr->addr3, pattrib->src);
 524         } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
 525                    check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
 526                 ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
 527                 ether_addr_copy(pwlanhdr->addr2, pattrib->src);
 528                 ether_addr_copy(pwlanhdr->addr3, bssid);
 529         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 530                 ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
 531                 ether_addr_copy(pwlanhdr->addr2, pattrib->src);
 532                 ether_addr_copy(pwlanhdr->addr3, bssid);
 533         } else {
 534                 return -EINVAL;
 535         }
 536
 537         if (pattrib->encrypt)
 538                 SetPrivacy(fctrl);
 539         if (pqospriv->qos_option) {
 540                 qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
 541                 if (pattrib->priority)
 542                         SetPriority(qc, pattrib->priority);
 543                 SetAckpolicy(qc, pattrib->ack_policy);
 544         }
 545         /* TODO: fill HT Control Field */
 546         /* Update Seq Num will be handled by f/w */
 547         {
 548                 struct sta_info *psta;
 549                 bool bmcst = is_multicast_ether_addr(pattrib->ra);
 550
 551                 if (pattrib->psta)
 552                         psta = pattrib->psta;
 553                 else if (bmcst)
 554                         psta = r8712_get_bcmc_stainfo(padapter);
 555                 else
 556                         psta = r8712_get_stainfo(&padapter->stapriv,
 557                                                  pattrib->ra);
 558
 559                 if (psta) {
 560                         u16 *txtid = psta->sta_xmitpriv.txseq_tid;
 561
 562                         txtid[pattrib->priority]++;
 563                         txtid[pattrib->priority] &= 0xFFF;
 564                         pattrib->seqnum = txtid[pattrib->priority];
 565                         SetSeqNum(hdr, pattrib->seqnum);
 566                 }
 567         }
 568
 569         return 0;
 570 }
 571
 572 static sint r8712_put_snap(u8 *data, u16 h_proto)
 573 {
 574         struct ieee80211_snap_hdr *snap;
 575         const u8 *oui;
 576
 577         snap = (struct ieee80211_snap_hdr *)data;
 578         snap->dsap = 0xaa;
 579         snap->ssap = 0xaa;
 580         snap->ctrl = 0x03;
 581         if (h_proto == 0x8137 || h_proto == 0x80f3)
 582                 oui = P802_1H_OUI;
 583         else
 584                 oui = RFC1042_OUI;
 585         snap->oui[0] = oui[0];
 586         snap->oui[1] = oui[1];
 587         snap->oui[2] = oui[2];
 588         *(__be16 *)(data + SNAP_SIZE) = htons(h_proto);
 589         return SNAP_SIZE + sizeof(u16);
 590 }
 591
 592 /*
 593  * This sub-routine will perform all the following:
 594  * 1. remove 802.3 header.
 595  * 2. create wlan_header, based on the info in pxmitframe
 596  * 3. append sta's iv/ext-iv
 597  * 4. append LLC
 598  * 5. move frag chunk from pframe to pxmitframe->mem
 599  * 6. apply sw-encrypt, if necessary.
 600  */
 601 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
 602                         struct xmit_frame *pxmitframe)
 603 {
 604         struct pkt_file pktfile;
 605
 606         sint    frg_len, mpdu_len, llc_sz;
 607         u32     mem_sz;
 608         u8      frg_inx;
 609         addr_t addr;
 610         u8 *pframe, *mem_start, *ptxdesc;
 611         struct sta_info         *psta;
 612         struct security_priv    *psecpriv = &padapter->securitypriv;
 613         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 614         struct xmit_priv        *pxmitpriv = &padapter->xmitpriv;
 615         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 616         u8 *pbuf_start;
 617         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 618
 619         if (!pattrib->psta)
 620                 return _FAIL;
 621         psta = pattrib->psta;
 622         if (!pxmitframe->buf_addr)
 623                 return _FAIL;
 624         pbuf_start = pxmitframe->buf_addr;
 625         ptxdesc = pbuf_start;
 626         mem_start = pbuf_start + TXDESC_OFFSET;
 627         if (make_wlanhdr(padapter, mem_start, pattrib))
 628                 return _FAIL;
 629         _r8712_open_pktfile(pkt, &pktfile);
 630         _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
 631         if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 632                 /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
 633                 if (pattrib->ether_type == 0x8712) {
 634                         /* take care -  update_txdesc overwrite this */
 635                         _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
 636                 }
 637         }
 638         pattrib->pktlen = pktfile.pkt_len;
 639         frg_inx = 0;
 640         frg_len = pxmitpriv->frag_len - 4;
 641         while (1) {
 642                 llc_sz = 0;
 643                 mpdu_len = frg_len;
 644                 pframe = mem_start;
 645                 SetMFrag(mem_start);
 646                 pframe += pattrib->hdrlen;
 647                 mpdu_len -= pattrib->hdrlen;
 648                 /* adding icv, if necessary...*/
 649                 if (pattrib->iv_len) {
 650                         if (psta) {
 651                                 switch (pattrib->encrypt) {
 652                                 case _WEP40_:
 653                                 case _WEP104_:
 654                                         WEP_IV(pattrib->iv, psta->txpn,
 655                                                (u8)psecpriv->PrivacyKeyIndex);
 656                                         break;
 657                                 case _TKIP_:
 658                                         if (bmcst)
 659                                                 TKIP_IV(pattrib->iv,
 660                                                     psta->txpn,
 661                                                     (u8)psecpriv->XGrpKeyid);
 662                                         else
 663                                                 TKIP_IV(pattrib->iv, psta->txpn,
 664                                                         0);
 665                                         break;
 666                                 case _AES_:
 667                                         if (bmcst)
 668                                                 AES_IV(pattrib->iv, psta->txpn,
 669                                                     (u8)psecpriv->XGrpKeyid);
 670                                         else
 671                                                 AES_IV(pattrib->iv, psta->txpn,
 672                                                        0);
 673                                         break;
 674                                 }
 675                         }
 676                         memcpy(pframe, pattrib->iv, pattrib->iv_len);
 677                         pframe += pattrib->iv_len;
 678                         mpdu_len -= pattrib->iv_len;
 679                 }
 680                 if (frg_inx == 0) {
 681                         llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
 682                         pframe += llc_sz;
 683                         mpdu_len -= llc_sz;
 684                 }
 685                 if ((pattrib->icv_len > 0) && (pattrib->bswenc))
 686                         mpdu_len -= pattrib->icv_len;
 687                 if (bmcst)
 688                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 689                                  pattrib->pktlen);
 690                 else
 691                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 692                                  mpdu_len);
 693                 pframe += mem_sz;
 694                 if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
 695                         memcpy(pframe, pattrib->icv, pattrib->icv_len);
 696                         pframe += pattrib->icv_len;
 697                 }
 698                 frg_inx++;
 699                 if (bmcst || r8712_endofpktfile(&pktfile)) {
 700                         pattrib->nr_frags = frg_inx;
 701                         pattrib->last_txcmdsz = pattrib->hdrlen +
 702                                                 pattrib->iv_len +
 703                                                 ((pattrib->nr_frags == 1) ?
 704                                                 llc_sz : 0) +
 705                                                 ((pattrib->bswenc) ?
 706                                                 pattrib->icv_len : 0) + mem_sz;
 707                         ClearMFrag(mem_start);
 708                         break;
 709                 }
 710                 addr = (addr_t)(pframe);
 711                 mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
 712                 memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
 713         }
 714
 715         if (xmitframe_addmic(padapter, pxmitframe))
 716                 return _FAIL;
 717         xmitframe_swencrypt(padapter, pxmitframe);
 718         return _SUCCESS;
 719 }
 720
 721 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
 722 {
 723         uint    protection;
 724         u8      *perp;
 725         uint    erp_len;
 726         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 727         struct  registry_priv *pregistrypriv = &padapter->registrypriv;
 728
 729         switch (pxmitpriv->vcs_setting) {
 730         case DISABLE_VCS:
 731                 pxmitpriv->vcs = NONE_VCS;
 732                 break;
 733         case ENABLE_VCS:
 734                 break;
 735         case AUTO_VCS:
 736         default:
 737                 perp = r8712_get_ie(ie, WLAN_EID_ERP_INFO, &erp_len, ie_len);
 738                 if (!perp) {
 739                         pxmitpriv->vcs = NONE_VCS;
 740                 } else {
 741                         protection = (*(perp + 2)) & BIT(1);
 742                         if (protection) {
 743                                 if (pregistrypriv->vcs_type == RTS_CTS)
 744                                         pxmitpriv->vcs = RTS_CTS;
 745                                 else
 746                                         pxmitpriv->vcs = CTS_TO_SELF;
 747                         } else {
 748                                 pxmitpriv->vcs = NONE_VCS;
 749                         }
 750                 }
 751                 break;
 752         }
 753 }
 754
 755 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
 756 {
 757         unsigned long irqL;
 758         struct xmit_buf *pxmitbuf;
 759         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 760
 761         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 762         pxmitbuf = list_first_entry_or_null(&pfree_xmitbuf_queue->queue,
 763                                             struct xmit_buf, list);
 764         if (pxmitbuf) {
 765                 list_del_init(&pxmitbuf->list);
 766                 pxmitpriv->free_xmitbuf_cnt--;
 767         }
 768         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 769         return pxmitbuf;
 770 }
 771
 772 void r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
 773 {
 774         unsigned long irqL;
 775         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 776
 777         if (!pxmitbuf)
 778                 return;
 779         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 780         list_del_init(&pxmitbuf->list);
 781         list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
 782         pxmitpriv->free_xmitbuf_cnt++;
 783         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 784 }
 785
 786 /*
 787  * Calling context:
 788  * 1. OS_TXENTRY
 789  * 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
 790  *
 791  * If we turn on USE_RXTHREAD, then, no need for critical section.
 792  * Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
 793  *
 794  * Must be very very cautious...
 795  *
 796  */
 797 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
 798 {
 799         /*
 800          * Please remember to use all the osdep_service api,
 801          * and lock/unlock or _enter/_exit critical to protect
 802          * pfree_xmit_queue
 803          */
 804         unsigned long irqL;
 805         struct xmit_frame *pxframe;
 806         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 807
 808         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 809         pxframe = list_first_entry_or_null(&pfree_xmit_queue->queue,
 810                                            struct xmit_frame, list);
 811         if (pxframe) {
 812                 list_del_init(&pxframe->list);
 813                 pxmitpriv->free_xmitframe_cnt--;
 814                 pxframe->buf_addr = NULL;
 815                 pxframe->pxmitbuf = NULL;
 816                 pxframe->attrib.psta = NULL;
 817                 pxframe->pkt = NULL;
 818         }
 819         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 820         return pxframe;
 821 }
 822
 823 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
 824                           struct xmit_frame *pxmitframe)
 825 {
 826         unsigned long irqL;
 827         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 828         struct _adapter *padapter = pxmitpriv->adapter;
 829
 830         if (!pxmitframe)
 831                 return;
 832         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 833         list_del_init(&pxmitframe->list);
 834         if (pxmitframe->pkt)
 835                 pxmitframe->pkt = NULL;
 836         list_add_tail(&pxmitframe->list, &pfree_xmit_queue->queue);
 837         pxmitpriv->free_xmitframe_cnt++;
 838         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 839         if (netif_queue_stopped(padapter->pnetdev))
 840                 netif_wake_queue(padapter->pnetdev);
 841 }
 842
 843 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
 844                       struct xmit_frame *pxmitframe)
 845 {
 846         if (!pxmitframe)
 847                 return;
 848         if (pxmitframe->frame_tag == DATA_FRAMETAG)
 849                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 850 }
 851
 852 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
 853                                 struct  __queue *pframequeue)
 854 {
 855         unsigned long irqL;
 856         struct list_head *plist, *phead;
 857         struct  xmit_frame      *pxmitframe;
 858
 859         spin_lock_irqsave(&(pframequeue->lock), irqL);
 860         phead = &pframequeue->queue;
 861         plist = phead->next;
 862         while (!end_of_queue_search(phead, plist)) {
 863                 pxmitframe = container_of(plist, struct xmit_frame, list);
 864                 plist = plist->next;
 865                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 866         }
 867         spin_unlock_irqrestore(&(pframequeue->lock), irqL);
 868 }
 869
 870 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
 871                                                struct  __queue **ppstapending,
 872                                                struct sta_info *psta, sint up)
 873 {
 874         struct tx_servq *ptxservq;
 875         struct hw_xmit *phwxmits =  padapter->xmitpriv.hwxmits;
 876
 877         switch (up) {
 878         case 1:
 879         case 2:
 880                 ptxservq = &(psta->sta_xmitpriv.bk_q);
 881                 *ppstapending = &padapter->xmitpriv.bk_pending;
 882                 (phwxmits + 3)->accnt++;
 883                 break;
 884         case 4:
 885         case 5:
 886                 ptxservq = &(psta->sta_xmitpriv.vi_q);
 887                 *ppstapending = &padapter->xmitpriv.vi_pending;
 888                 (phwxmits + 1)->accnt++;
 889                 break;
 890         case 6:
 891         case 7:
 892                 ptxservq = &(psta->sta_xmitpriv.vo_q);
 893                 *ppstapending = &padapter->xmitpriv.vo_pending;
 894                 (phwxmits + 0)->accnt++;
 895                 break;
 896         case 0:
 897         case 3:
 898         default:
 899                 ptxservq = &(psta->sta_xmitpriv.be_q);
 900                 *ppstapending = &padapter->xmitpriv.be_pending;
 901                 (phwxmits + 2)->accnt++;
 902                 break;
 903         }
 904         return ptxservq;
 905 }
 906
 907 /*
 908  * Will enqueue pxmitframe to the proper queue, and indicate it
 909  * to xx_pending list.....
 910  */
 911 int r8712_xmit_classifier(struct _adapter *padapter,
 912                           struct xmit_frame *pxmitframe)
 913 {
 914         unsigned long irqL0;
 915         struct  __queue *pstapending;
 916         struct sta_info *psta;
 917         struct tx_servq *ptxservq;
 918         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 919         struct sta_priv *pstapriv = &padapter->stapriv;
 920         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 921         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 922
 923         if (pattrib->psta) {
 924                 psta = pattrib->psta;
 925         } else {
 926                 if (bmcst) {
 927                         psta = r8712_get_bcmc_stainfo(padapter);
 928                 } else {
 929                         if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
 930                                 psta = r8712_get_stainfo(pstapriv,
 931                                        get_bssid(pmlmepriv));
 932                         else
 933                                 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 934                 }
 935         }
 936         if (!psta)
 937                 return -EINVAL;
 938         ptxservq = get_sta_pending(padapter, &pstapending,
 939                    psta, pattrib->priority);
 940         spin_lock_irqsave(&pstapending->lock, irqL0);
 941         if (list_empty(&ptxservq->tx_pending))
 942                 list_add_tail(&ptxservq->tx_pending, &pstapending->queue);
 943         list_add_tail(&pxmitframe->list, &ptxservq->sta_pending.queue);
 944         ptxservq->qcnt++;
 945         spin_unlock_irqrestore(&pstapending->lock, irqL0);
 946         return 0;
 947 }
 948
 949 static void alloc_hwxmits(struct _adapter *padapter)
 950 {
 951         struct hw_xmit *hwxmits;
 952         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 953
 954         pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
 955         pxmitpriv->hwxmits = kmalloc_array(pxmitpriv->hwxmit_entry,
 956                                 sizeof(struct hw_xmit), GFP_ATOMIC);
 957         if (!pxmitpriv->hwxmits)
 958                 return;
 959         hwxmits = pxmitpriv->hwxmits;
 960         if (pxmitpriv->hwxmit_entry == 5) {
 961                 pxmitpriv->bmc_txqueue.head = 0;
 962                 hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
 963                 hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
 964                 pxmitpriv->vo_txqueue.head = 0;
 965                 hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
 966                 hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
 967                 pxmitpriv->vi_txqueue.head = 0;
 968                 hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
 969                 hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
 970                 pxmitpriv->bk_txqueue.head = 0;
 971                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 972                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 973                 pxmitpriv->be_txqueue.head = 0;
 974                 hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
 975                 hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
 976         } else if (pxmitpriv->hwxmit_entry == 4) {
 977                 pxmitpriv->vo_txqueue.head = 0;
 978                 hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
 979                 hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
 980                 pxmitpriv->vi_txqueue.head = 0;
 981                 hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
 982                 hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
 983                 pxmitpriv->be_txqueue.head = 0;
 984                 hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
 985                 hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
 986                 pxmitpriv->bk_txqueue.head = 0;
 987                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 988                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 989         }
 990 }
 991
 992 static void free_hwxmits(struct _adapter *padapter)
 993 {
 994         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 995
 996         kfree(pxmitpriv->hwxmits);
 997 }
 998
 999 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
1000 {
1001         sint i;
1002
1003         for (i = 0; i < entry; i++, phwxmit++) {
1004                 spin_lock_init(&phwxmit->xmit_lock);
1005                 INIT_LIST_HEAD(&phwxmit->pending);
1006                 phwxmit->txcmdcnt = 0;
1007                 phwxmit->accnt = 0;
1008         }
1009 }
1010
1011 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
1012                         struct xmit_buf *pxmitbuf)
1013 {
1014         /* pxmitbuf attach to pxmitframe */
1015         pxmitframe->pxmitbuf = pxmitbuf;
1016         /* urb and irp connection */
1017         pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
1018         /* buffer addr assoc */
1019         pxmitframe->buf_addr = pxmitbuf->pbuf;
1020         /* pxmitframe attach to pxmitbuf */
1021         pxmitbuf->priv_data = pxmitframe;
1022 }
1023
1024 /*
1025  * tx_action == 0 == no frames to transmit
1026  * tx_action > 0 ==> we have frames to transmit
1027  * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1028  *                                               to transmit 1 frame.
1029  */
1030
1031 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1032 {
1033         unsigned long irqL;
1034         int ret;
1035         struct xmit_buf *pxmitbuf = NULL;
1036         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1037         struct pkt_attrib *pattrib = &pxmitframe->attrib;
1038
1039         r8712_do_queue_select(padapter, pattrib);
1040         spin_lock_irqsave(&pxmitpriv->lock, irqL);
1041         if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1042                 ret = false;
1043                 r8712_xmit_enqueue(padapter, pxmitframe);
1044                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1045                 return ret;
1046         }
1047         pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1048         if (!pxmitbuf) { /*enqueue packet*/
1049                 ret = false;
1050                 r8712_xmit_enqueue(padapter, pxmitframe);
1051                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1052         } else { /*dump packet directly*/
1053                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1054                 ret = true;
1055                 xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1056                 r8712_xmit_direct(padapter, pxmitframe);
1057         }
1058         return ret;
1059 }