drivers/staging/rtl8712/rtl871x

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This source file includes following definitions.
_init_txservq
_r8712_init_sta_xmit_priv
_r8712_init_xmit_priv
_free_xmit_priv
r8712_update_attrib
xmitframe_addmic
xmitframe_swencrypt
make_wlanhdr
r8712_put_snap
r8712_xmitframe_coalesce
r8712_update_protection
r8712_alloc_xmitbuf
r8712_free_xmitbuf
r8712_alloc_xmitframe
r8712_free_xmitframe
r8712_free_xmitframe_ex
r8712_free_xmitframe_queue
get_sta_pending
r8712_xmit_classifier
alloc_hwxmits
free_hwxmits
init_hwxmits
xmitframe_xmitbuf_attach
r8712_pre_xmit
   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 "wifi.h"
  22 #include "osdep_intf.h"
  23 #include "usb_ops.h"
  24 
  25 
  26 static const u8 P802_1H_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0xf8};
  27 static const u8 RFC1042_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0x00};
  28 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry);
  29 static void alloc_hwxmits(struct _adapter *padapter);
  30 static void free_hwxmits(struct _adapter *padapter);
  31 
  32 static void _init_txservq(struct tx_servq *ptxservq)
  33 {
  34         INIT_LIST_HEAD(&ptxservq->tx_pending);
  35         _init_queue(&ptxservq->sta_pending);
  36         ptxservq->qcnt = 0;
  37 }
  38 
  39 void _r8712_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv)
  40 {
  41         memset((unsigned char *)psta_xmitpriv, 0,
  42                  sizeof(struct sta_xmit_priv));
  43         spin_lock_init(&psta_xmitpriv->lock);
  44         _init_txservq(&psta_xmitpriv->be_q);
  45         _init_txservq(&psta_xmitpriv->bk_q);
  46         _init_txservq(&psta_xmitpriv->vi_q);
  47         _init_txservq(&psta_xmitpriv->vo_q);
  48         INIT_LIST_HEAD(&psta_xmitpriv->legacy_dz);
  49         INIT_LIST_HEAD(&psta_xmitpriv->apsd);
  50 }
  51 
  52 int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
  53                           struct _adapter *padapter)
  54 {
  55         sint i;
  56         struct xmit_buf *pxmitbuf;
  57         struct xmit_frame *pxframe;
  58 
  59         memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv));
  60         spin_lock_init(&pxmitpriv->lock);
  61         /*
  62          *Please insert all the queue initialization using _init_queue below
  63          */
  64         pxmitpriv->adapter = padapter;
  65         _init_queue(&pxmitpriv->be_pending);
  66         _init_queue(&pxmitpriv->bk_pending);
  67         _init_queue(&pxmitpriv->vi_pending);
  68         _init_queue(&pxmitpriv->vo_pending);
  69         _init_queue(&pxmitpriv->bm_pending);
  70         _init_queue(&pxmitpriv->legacy_dz_queue);
  71         _init_queue(&pxmitpriv->apsd_queue);
  72         _init_queue(&pxmitpriv->free_xmit_queue);
  73         /*
  74          * Please allocate memory with the sz = (struct xmit_frame) * NR_XMITFRAME,
  75          * and initialize free_xmit_frame below.
  76          * Please also apply  free_txobj to link_up all the xmit_frames...
  77          */
  78         pxmitpriv->pallocated_frame_buf =
  79                 kmalloc(NR_XMITFRAME * sizeof(struct xmit_frame) + 4, GFP_ATOMIC);
  80         if (!pxmitpriv->pallocated_frame_buf) {
  81                 pxmitpriv->pxmit_frame_buf = NULL;
  82                 return -ENOMEM;
  83         }
  84         pxmitpriv->pxmit_frame_buf = pxmitpriv->pallocated_frame_buf + 4 -
  85                         ((addr_t) (pxmitpriv->pallocated_frame_buf) & 3);
  86         pxframe = (struct xmit_frame *) pxmitpriv->pxmit_frame_buf;
  87         for (i = 0; i < NR_XMITFRAME; i++) {
  88                 INIT_LIST_HEAD(&(pxframe->list));
  89                 pxframe->padapter = padapter;
  90                 pxframe->frame_tag = DATA_FRAMETAG;
  91                 pxframe->pkt = NULL;
  92                 pxframe->buf_addr = NULL;
  93                 pxframe->pxmitbuf = NULL;
  94                 list_add_tail(&(pxframe->list),
  95                                  &(pxmitpriv->free_xmit_queue.queue));
  96                 pxframe++;
  97         }
  98         pxmitpriv->free_xmitframe_cnt = NR_XMITFRAME;
  99         /*
 100          * init xmit hw_txqueue
 101          */
 102         _r8712_init_hw_txqueue(&pxmitpriv->be_txqueue, BE_QUEUE_INX);
 103         _r8712_init_hw_txqueue(&pxmitpriv->bk_txqueue, BK_QUEUE_INX);
 104         _r8712_init_hw_txqueue(&pxmitpriv->vi_txqueue, VI_QUEUE_INX);
 105         _r8712_init_hw_txqueue(&pxmitpriv->vo_txqueue, VO_QUEUE_INX);
 106         _r8712_init_hw_txqueue(&pxmitpriv->bmc_txqueue, BMC_QUEUE_INX);
 107         pxmitpriv->frag_len = MAX_FRAG_THRESHOLD;
 108         pxmitpriv->txirp_cnt = 1;
 109         /*per AC pending irp*/
 110         pxmitpriv->beq_cnt = 0;
 111         pxmitpriv->bkq_cnt = 0;
 112         pxmitpriv->viq_cnt = 0;
 113         pxmitpriv->voq_cnt = 0;
 114         /*init xmit_buf*/
 115         _init_queue(&pxmitpriv->free_xmitbuf_queue);
 116         _init_queue(&pxmitpriv->pending_xmitbuf_queue);
 117         pxmitpriv->pallocated_xmitbuf =
 118                 kmalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4, GFP_ATOMIC);
 119         if (!pxmitpriv->pallocated_xmitbuf) {
 120                 kfree(pxmitpriv->pallocated_frame_buf);
 121                 pxmitpriv->pallocated_frame_buf = NULL;
 122                 return -ENOMEM;
 123         }
 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 = kmalloc(MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ,
 130                                                    GFP_ATOMIC);
 131                 if (!pxmitbuf->pallocated_buf)
 132                         return -ENOMEM;
 133                 pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
 134                                  ((addr_t) (pxmitbuf->pallocated_buf) &
 135                                  (XMITBUF_ALIGN_SZ - 1));
 136                 if (r8712_xmit_resource_alloc(padapter, pxmitbuf))
 137                         return -ENOMEM;
 138                 list_add_tail(&pxmitbuf->list,
 139                                  &(pxmitpriv->free_xmitbuf_queue.queue));
 140                 pxmitbuf++;
 141         }
 142         pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF;
 143         INIT_WORK(&padapter->wk_filter_rx_ff0, r8712_SetFilter);
 144         alloc_hwxmits(padapter);
 145         init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
 146         tasklet_init(&pxmitpriv->xmit_tasklet,
 147                 (void(*)(unsigned long))r8712_xmit_bh,
 148                 (unsigned long)padapter);
 149         return 0;
 150 }
 151 
 152 void _free_xmit_priv(struct xmit_priv *pxmitpriv)
 153 {
 154         int i;
 155         struct _adapter *padapter = pxmitpriv->adapter;
 156         struct xmit_frame *pxmitframe = (struct xmit_frame *)
 157                                         pxmitpriv->pxmit_frame_buf;
 158         struct xmit_buf *pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
 159 
 160         if (pxmitpriv->pxmit_frame_buf == NULL)
 161                 return;
 162         for (i = 0; i < NR_XMITFRAME; i++) {
 163                 r8712_xmit_complete(padapter, pxmitframe);
 164                 pxmitframe++;
 165         }
 166         for (i = 0; i < NR_XMITBUFF; i++) {
 167                 r8712_xmit_resource_free(padapter, pxmitbuf);
 168                 kfree(pxmitbuf->pallocated_buf);
 169                 pxmitbuf++;
 170         }
 171         kfree(pxmitpriv->pallocated_frame_buf);
 172         kfree(pxmitpriv->pallocated_xmitbuf);
 173         free_hwxmits(padapter);
 174 }
 175 
 176 int r8712_update_attrib(struct _adapter *padapter, _pkt *pkt,
 177                         struct pkt_attrib *pattrib)
 178 {
 179         struct pkt_file pktfile;
 180         struct sta_info *psta = NULL;
 181         struct ethhdr etherhdr;
 182 
 183         struct tx_cmd txdesc;
 184 
 185         bool bmcast;
 186         struct sta_priv         *pstapriv = &padapter->stapriv;
 187         struct security_priv    *psecuritypriv = &padapter->securitypriv;
 188         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 189         struct qos_priv         *pqospriv = &pmlmepriv->qospriv;
 190 
 191         _r8712_open_pktfile(pkt, &pktfile);
 192 
 193         _r8712_pktfile_read(&pktfile, (unsigned char *)&etherhdr, ETH_HLEN);
 194 
 195         pattrib->ether_type = ntohs(etherhdr.h_proto);
 196 
 197         /*
 198          * If driver xmit ARP packet, driver can set ps mode to initial
 199          * setting. It stands for getting DHCP or fix IP.
 200          */
 201         if (pattrib->ether_type == 0x0806) {
 202                 if (padapter->pwrctrlpriv.pwr_mode !=
 203                     padapter->registrypriv.power_mgnt) {
 204                         del_timer_sync(&pmlmepriv->dhcp_timer);
 205                         r8712_set_ps_mode(padapter,
 206                                           padapter->registrypriv.power_mgnt,
 207                                           padapter->registrypriv.smart_ps);
 208                 }
 209         }
 210 
 211         memcpy(pattrib->dst, &etherhdr.h_dest, ETH_ALEN);
 212         memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);
 213         pattrib->pctrl = 0;
 214         if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
 215             check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
 216                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 217                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 218         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 219                 memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
 220                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 221         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 222                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 223                 memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
 224         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 225                 /*firstly, filter packet not belongs to mp*/
 226                 if (pattrib->ether_type != 0x8712)
 227                         return -EINVAL;
 228                 /* for mp storing the txcmd per packet,
 229                  * according to the info of txcmd to update pattrib
 230                  */
 231                 /*get MP_TXDESC_SIZE bytes txcmd per packet*/
 232                 _r8712_pktfile_read(&pktfile, (u8 *)&txdesc, TXDESC_SIZE);
 233                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 234                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 235                 pattrib->pctrl = 1;
 236         }
 237         /* r8712_xmitframe_coalesce() overwrite this!*/
 238         pattrib->pktlen = pktfile.pkt_len;
 239         if (pattrib->ether_type == ETH_P_IP) {
 240                 /* The following is for DHCP and ARP packet, we use cck1M to
 241                  * tx these packets and let LPS awake some time
 242                  * to prevent DHCP protocol fail
 243                  */
 244                 u8 tmp[24];
 245 
 246                 _r8712_pktfile_read(&pktfile, &tmp[0], 24);
 247                 pattrib->dhcp_pkt = 0;
 248                 if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
 249                         if (pattrib->ether_type == ETH_P_IP) {/* IP header*/
 250                                 if (((tmp[21] == 68) && (tmp[23] == 67)) ||
 251                                         ((tmp[21] == 67) && (tmp[23] == 68))) {
 252                                         /* 68 : UDP BOOTP client
 253                                          * 67 : UDP BOOTP server
 254                                          * Use low rate to send DHCP packet.
 255                                          */
 256                                         pattrib->dhcp_pkt = 1;
 257                                 }
 258                         }
 259                 }
 260         }
 261         bmcast = is_multicast_ether_addr(pattrib->ra);
 262         /* get sta_info*/
 263         if (bmcast) {
 264                 psta = r8712_get_bcmc_stainfo(padapter);
 265                 pattrib->mac_id = 4;
 266         } else {
 267                 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 268                         psta = r8712_get_stainfo(pstapriv,
 269                                                  get_bssid(pmlmepriv));
 270                         pattrib->mac_id = 5;
 271                 } else {
 272                         psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 273                         if (psta == NULL)  /* drop the pkt */
 274                                 return -ENOMEM;
 275                         if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
 276                                 pattrib->mac_id = 5;
 277                         else
 278                                 pattrib->mac_id = psta->mac_id;
 279                 }
 280         }
 281 
 282         if (psta) {
 283                 pattrib->psta = psta;
 284         } else {
 285                 /* if we cannot get psta => drrp the pkt */
 286                 return -ENOMEM;
 287         }
 288 
 289         pattrib->ack_policy = 0;
 290         /* get ether_hdr_len */
 291         pattrib->pkt_hdrlen = ETH_HLEN;
 292 
 293         if (pqospriv->qos_option) {
 294                 r8712_set_qos(&pktfile, pattrib);
 295         } else {
 296                 pattrib->hdrlen = WLAN_HDR_A3_LEN;
 297                 pattrib->subtype = WIFI_DATA_TYPE;
 298                 pattrib->priority = 0;
 299         }
 300         if (psta->ieee8021x_blocked) {
 301                 pattrib->encrypt = 0;
 302                 if ((pattrib->ether_type != 0x888e) &&
 303                     !check_fwstate(pmlmepriv, WIFI_MP_STATE))
 304                         return -EINVAL;
 305         } else {
 306                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
 307         }
 308         switch (pattrib->encrypt) {
 309         case _WEP40_:
 310         case _WEP104_:
 311                 pattrib->iv_len = 4;
 312                 pattrib->icv_len = 4;
 313                 break;
 314         case _TKIP_:
 315                 pattrib->iv_len = 8;
 316                 pattrib->icv_len = 4;
 317                 if (padapter->securitypriv.busetkipkey == _FAIL)
 318                         return -EINVAL;
 319                 break;
 320         case _AES_:
 321                 pattrib->iv_len = 8;
 322                 pattrib->icv_len = 8;
 323                 break;
 324         default:
 325                 pattrib->iv_len = 0;
 326                 pattrib->icv_len = 0;
 327                 break;
 328         }
 329 
 330         if (pattrib->encrypt &&
 331             (padapter->securitypriv.sw_encrypt ||
 332             !psecuritypriv->hw_decrypted))
 333                 pattrib->bswenc = true;
 334         else
 335                 pattrib->bswenc = false;
 336         /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
 337          * some settings above.
 338          */
 339         if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
 340                 pattrib->priority =
 341                     (le32_to_cpu(txdesc.txdw1) >> QSEL_SHT) & 0x1f;
 342         return 0;
 343 }
 344 
 345 static int xmitframe_addmic(struct _adapter *padapter,
 346                             struct xmit_frame *pxmitframe)
 347 {
 348         u32     curfragnum, length;
 349         u8      *pframe, *payload, mic[8];
 350         struct  mic_data micdata;
 351         struct  sta_info *stainfo;
 352         struct  qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
 353         struct  pkt_attrib  *pattrib = &pxmitframe->attrib;
 354         struct  security_priv *psecuritypriv = &padapter->securitypriv;
 355         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 356         u8 priority[4] = {0x0, 0x0, 0x0, 0x0};
 357         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 358 
 359         if (pattrib->psta)
 360                 stainfo = pattrib->psta;
 361         else
 362                 stainfo = r8712_get_stainfo(&padapter->stapriv,
 363                                             &pattrib->ra[0]);
 364         if (pattrib->encrypt == _TKIP_) {
 365                 /*encode mic code*/
 366                 if (stainfo != NULL) {
 367                         u8 null_key[16] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
 368                                            0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
 369                                            0x0, 0x0};
 370                         pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
 371                         if (bmcst) {
 372                                 if (!memcmp(psecuritypriv->XGrptxmickey
 373                                    [psecuritypriv->XGrpKeyid].skey,
 374                                    null_key, 16))
 375                                         return -ENOMEM;
 376                                 /*start to calculate the mic code*/
 377                                 r8712_secmicsetkey(&micdata,
 378                                          psecuritypriv->
 379                                          XGrptxmickey[psecuritypriv->
 380                                         XGrpKeyid].skey);
 381                         } else {
 382                                 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
 383                                             null_key, 16))
 384                                         return -ENOMEM;
 385                                 /* start to calculate the mic code */
 386                                 r8712_secmicsetkey(&micdata,
 387                                              &stainfo->tkiptxmickey.skey[0]);
 388                         }
 389                         if (pframe[1] & 1) {   /* ToDS==1 */
 390                                 r8712_secmicappend(&micdata,
 391                                                    &pframe[16], 6); /*DA*/
 392                                 if (pframe[1] & 2)  /* From Ds==1 */
 393                                         r8712_secmicappend(&micdata,
 394                                                            &pframe[24], 6);
 395                                 else
 396                                         r8712_secmicappend(&micdata,
 397                                                            &pframe[10], 6);
 398                         } else {        /* ToDS==0 */
 399                                 r8712_secmicappend(&micdata,
 400                                                    &pframe[4], 6); /* DA */
 401                                 if (pframe[1] & 2)  /* From Ds==1 */
 402                                         r8712_secmicappend(&micdata,
 403                                                            &pframe[16], 6);
 404                                 else
 405                                         r8712_secmicappend(&micdata,
 406                                                            &pframe[10], 6);
 407                         }
 408                         if (pqospriv->qos_option == 1)
 409                                 priority[0] = (u8)pxmitframe->attrib.priority;
 410                         r8712_secmicappend(&micdata, &priority[0], 4);
 411                         payload = pframe;
 412                         for (curfragnum = 0; curfragnum < pattrib->nr_frags;
 413                              curfragnum++) {
 414                                 payload = (u8 *)RND4((addr_t)(payload));
 415                                 payload += pattrib->hdrlen + pattrib->iv_len;
 416                                 if ((curfragnum + 1) == pattrib->nr_frags) {
 417                                         length = pattrib->last_txcmdsz -
 418                                                   pattrib->hdrlen -
 419                                                   pattrib->iv_len -
 420                                                   ((psecuritypriv->sw_encrypt)
 421                                                   ? pattrib->icv_len : 0);
 422                                         r8712_secmicappend(&micdata, payload,
 423                                                            length);
 424                                         payload = payload + length;
 425                                 } else {
 426                                         length = pxmitpriv->frag_len -
 427                                             pattrib->hdrlen - pattrib->iv_len -
 428                                             ((psecuritypriv->sw_encrypt) ?
 429                                             pattrib->icv_len : 0);
 430                                         r8712_secmicappend(&micdata, payload,
 431                                                            length);
 432                                         payload = payload + length +
 433                                                   pattrib->icv_len;
 434                                 }
 435                         }
 436                         r8712_secgetmic(&micdata, &(mic[0]));
 437                         /* add mic code  and add the mic code length in
 438                          * last_txcmdsz
 439                          */
 440                         memcpy(payload, &(mic[0]), 8);
 441                         pattrib->last_txcmdsz += 8;
 442                         payload = payload - pattrib->last_txcmdsz + 8;
 443                 }
 444         }
 445         return 0;
 446 }
 447 
 448 static sint xmitframe_swencrypt(struct _adapter *padapter,
 449                                 struct xmit_frame *pxmitframe)
 450 {
 451         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 452 
 453         if (pattrib->bswenc) {
 454                 switch (pattrib->encrypt) {
 455                 case _WEP40_:
 456                 case _WEP104_:
 457                         r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
 458                         break;
 459                 case _TKIP_:
 460                         r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
 461                         break;
 462                 case _AES_:
 463                         r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
 464                         break;
 465                 default:
 466                                 break;
 467                 }
 468         }
 469         return _SUCCESS;
 470 }
 471 
 472 static int make_wlanhdr(struct _adapter *padapter, u8 *hdr,
 473                         struct pkt_attrib *pattrib)
 474 {
 475         u16 *qc;
 476 
 477         struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
 478         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 479         struct qos_priv *pqospriv = &pmlmepriv->qospriv;
 480         __le16 *fctrl = &pwlanhdr->frame_ctl;
 481 
 482         memset(hdr, 0, WLANHDR_OFFSET);
 483         SetFrameSubType(fctrl, pattrib->subtype);
 484         if (pattrib->subtype & WIFI_DATA_TYPE) {
 485                 if (check_fwstate(pmlmepriv,  WIFI_STATION_STATE)) {
 486                         /* to_ds = 1, fr_ds = 0; */
 487                         SetToDs(fctrl);
 488                         memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv),
 489                                 ETH_ALEN);
 490                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 491                         memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
 492                 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 493                         /* to_ds = 0, fr_ds = 1; */
 494                         SetFrDs(fctrl);
 495                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 496                         memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv),
 497                                 ETH_ALEN);
 498                         memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);
 499                 } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
 500                            check_fwstate(pmlmepriv,
 501                                          WIFI_ADHOC_MASTER_STATE)) {
 502                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 503                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 504                         memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
 505                                 ETH_ALEN);
 506                 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 507                         memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
 508                         memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
 509                         memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
 510                                 ETH_ALEN);
 511                 } else {
 512                         return -EINVAL;
 513                 }
 514 
 515                 if (pattrib->encrypt)
 516                         SetPrivacy(fctrl);
 517                 if (pqospriv->qos_option) {
 518                         qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
 519                         if (pattrib->priority)
 520                                 SetPriority(qc, pattrib->priority);
 521                         SetAckpolicy(qc, pattrib->ack_policy);
 522                 }
 523                 /* TODO: fill HT Control Field */
 524                 /* Update Seq Num will be handled by f/w */
 525                 {
 526                         struct sta_info *psta;
 527                         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 528 
 529                         if (pattrib->psta) {
 530                                 psta = pattrib->psta;
 531                         } else {
 532                                 if (bmcst)
 533                                         psta = r8712_get_bcmc_stainfo(padapter);
 534                                 else
 535                                         psta =
 536                                          r8712_get_stainfo(&padapter->stapriv,
 537                                          pattrib->ra);
 538                         }
 539                         if (psta) {
 540                                 psta->sta_xmitpriv.txseq_tid
 541                                                   [pattrib->priority]++;
 542                                 psta->sta_xmitpriv.txseq_tid[pattrib->priority]
 543                                                    &= 0xFFF;
 544                                 pattrib->seqnum = psta->sta_xmitpriv.
 545                                                   txseq_tid[pattrib->priority];
 546                                 SetSeqNum(hdr, pattrib->seqnum);
 547                         }
 548                 }
 549         }
 550         return 0;
 551 }
 552 
 553 static sint r8712_put_snap(u8 *data, u16 h_proto)
 554 {
 555         struct ieee80211_snap_hdr *snap;
 556         const u8 *oui;
 557 
 558         snap = (struct ieee80211_snap_hdr *)data;
 559         snap->dsap = 0xaa;
 560         snap->ssap = 0xaa;
 561         snap->ctrl = 0x03;
 562         if (h_proto == 0x8137 || h_proto == 0x80f3)
 563                 oui = P802_1H_OUI;
 564         else
 565                 oui = RFC1042_OUI;
 566         snap->oui[0] = oui[0];
 567         snap->oui[1] = oui[1];
 568         snap->oui[2] = oui[2];
 569         *(__be16 *)(data + SNAP_SIZE) = htons(h_proto);
 570         return SNAP_SIZE + sizeof(u16);
 571 }
 572 
 573 /*
 574  * This sub-routine will perform all the following:
 575  * 1. remove 802.3 header.
 576  * 2. create wlan_header, based on the info in pxmitframe
 577  * 3. append sta's iv/ext-iv
 578  * 4. append LLC
 579  * 5. move frag chunk from pframe to pxmitframe->mem
 580  * 6. apply sw-encrypt, if necessary.
 581  */
 582 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
 583                         struct xmit_frame *pxmitframe)
 584 {
 585         struct pkt_file pktfile;
 586 
 587         sint    frg_len, mpdu_len, llc_sz;
 588         u32     mem_sz;
 589         u8      frg_inx;
 590         addr_t addr;
 591         u8 *pframe, *mem_start, *ptxdesc;
 592         struct sta_info         *psta;
 593         struct security_priv    *psecuritypriv = &padapter->securitypriv;
 594         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 595         struct xmit_priv        *pxmitpriv = &padapter->xmitpriv;
 596         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 597         u8 *pbuf_start;
 598         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 599 
 600         if (pattrib->psta == NULL)
 601                 return _FAIL;
 602         psta = pattrib->psta;
 603         if (pxmitframe->buf_addr == NULL)
 604                 return _FAIL;
 605         pbuf_start = pxmitframe->buf_addr;
 606         ptxdesc = pbuf_start;
 607         mem_start = pbuf_start + TXDESC_OFFSET;
 608         if (make_wlanhdr(padapter, mem_start, pattrib))
 609                 return _FAIL;
 610         _r8712_open_pktfile(pkt, &pktfile);
 611         _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
 612         if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 613                 /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
 614                 if (pattrib->ether_type == 0x8712) {
 615                         /* take care -  update_txdesc overwrite this */
 616                         _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
 617                 }
 618         }
 619         pattrib->pktlen = pktfile.pkt_len;
 620         frg_inx = 0;
 621         frg_len = pxmitpriv->frag_len - 4;
 622         while (1) {
 623                 llc_sz = 0;
 624                 mpdu_len = frg_len;
 625                 pframe = mem_start;
 626                 SetMFrag(mem_start);
 627                 pframe += pattrib->hdrlen;
 628                 mpdu_len -= pattrib->hdrlen;
 629                 /* adding icv, if necessary...*/
 630                 if (pattrib->iv_len) {
 631                         if (psta != NULL) {
 632                                 switch (pattrib->encrypt) {
 633                                 case _WEP40_:
 634                                 case _WEP104_:
 635                                         WEP_IV(pattrib->iv, psta->txpn,
 636                                                (u8)psecuritypriv->
 637                                                PrivacyKeyIndex);
 638                                         break;
 639                                 case _TKIP_:
 640                                         if (bmcst)
 641                                                 TKIP_IV(pattrib->iv,
 642                                                     psta->txpn,
 643                                                     (u8)psecuritypriv->
 644                                                     XGrpKeyid);
 645                                         else
 646                                                 TKIP_IV(pattrib->iv, psta->txpn,
 647                                                         0);
 648                                         break;
 649                                 case _AES_:
 650                                         if (bmcst)
 651                                                 AES_IV(pattrib->iv, psta->txpn,
 652                                                     (u8)psecuritypriv->
 653                                                     XGrpKeyid);
 654                                         else
 655                                                 AES_IV(pattrib->iv, psta->txpn,
 656                                                        0);
 657                                         break;
 658                                 }
 659                         }
 660                         memcpy(pframe, pattrib->iv, pattrib->iv_len);
 661                         pframe += pattrib->iv_len;
 662                         mpdu_len -= pattrib->iv_len;
 663                 }
 664                 if (frg_inx == 0) {
 665                         llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
 666                         pframe += llc_sz;
 667                         mpdu_len -= llc_sz;
 668                 }
 669                 if ((pattrib->icv_len > 0) && (pattrib->bswenc))
 670                         mpdu_len -= pattrib->icv_len;
 671                 if (bmcst)
 672                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 673                                  pattrib->pktlen);
 674                 else
 675                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 676                                  mpdu_len);
 677                 pframe += mem_sz;
 678                 if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
 679                         memcpy(pframe, pattrib->icv, pattrib->icv_len);
 680                         pframe += pattrib->icv_len;
 681                 }
 682                 frg_inx++;
 683                 if (bmcst || r8712_endofpktfile(&pktfile)) {
 684                         pattrib->nr_frags = frg_inx;
 685                         pattrib->last_txcmdsz = pattrib->hdrlen +
 686                                                 pattrib->iv_len +
 687                                                 ((pattrib->nr_frags == 1) ?
 688                                                 llc_sz : 0) +
 689                                                 ((pattrib->bswenc) ?
 690                                                 pattrib->icv_len : 0) + mem_sz;
 691                         ClearMFrag(mem_start);
 692                         break;
 693                 }
 694                 addr = (addr_t)(pframe);
 695                 mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
 696                 memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
 697         }
 698 
 699         if (xmitframe_addmic(padapter, pxmitframe))
 700                 return _FAIL;
 701         xmitframe_swencrypt(padapter, pxmitframe);
 702         return _SUCCESS;
 703 }
 704 
 705 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
 706 {
 707         uint    protection;
 708         u8      *perp;
 709         uint    erp_len;
 710         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 711         struct  registry_priv *pregistrypriv = &padapter->registrypriv;
 712 
 713         switch (pxmitpriv->vcs_setting) {
 714         case DISABLE_VCS:
 715                 pxmitpriv->vcs = NONE_VCS;
 716                 break;
 717         case ENABLE_VCS:
 718                 break;
 719         case AUTO_VCS:
 720         default:
 721                 perp = r8712_get_ie(ie, _ERPINFO_IE_, &erp_len, ie_len);
 722                 if (perp == NULL) {
 723                         pxmitpriv->vcs = NONE_VCS;
 724                 } else {
 725                         protection = (*(perp + 2)) & BIT(1);
 726                         if (protection) {
 727                                 if (pregistrypriv->vcs_type == RTS_CTS)
 728                                         pxmitpriv->vcs = RTS_CTS;
 729                                 else
 730                                         pxmitpriv->vcs = CTS_TO_SELF;
 731                         } else {
 732                                 pxmitpriv->vcs = NONE_VCS;
 733                         }
 734                 }
 735                 break;
 736         }
 737 }
 738 
 739 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
 740 {
 741         unsigned long irqL;
 742         struct xmit_buf *pxmitbuf;
 743         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 744 
 745         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 746         pxmitbuf = list_first_entry_or_null(&pfree_xmitbuf_queue->queue,
 747                                             struct xmit_buf, list);
 748         if (pxmitbuf) {
 749                 list_del_init(&pxmitbuf->list);
 750                 pxmitpriv->free_xmitbuf_cnt--;
 751         }
 752         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 753         return pxmitbuf;
 754 }
 755 
 756 void r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
 757 {
 758         unsigned long irqL;
 759         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 760 
 761         if (pxmitbuf == NULL)
 762                 return;
 763         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 764         list_del_init(&pxmitbuf->list);
 765         list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
 766         pxmitpriv->free_xmitbuf_cnt++;
 767         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 768 }
 769 
 770 /*
 771  * Calling context:
 772  * 1. OS_TXENTRY
 773  * 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
 774  *
 775  * If we turn on USE_RXTHREAD, then, no need for critical section.
 776  * Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
 777  *
 778  * Must be very very cautious...
 779  *
 780  */
 781 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
 782 {
 783         /*
 784          * Please remember to use all the osdep_service api,
 785          * and lock/unlock or _enter/_exit critical to protect
 786          * pfree_xmit_queue
 787          */
 788         unsigned long irqL;
 789         struct xmit_frame *pxframe;
 790         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 791 
 792         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 793         pxframe = list_first_entry_or_null(&pfree_xmit_queue->queue,
 794                                            struct xmit_frame, list);
 795         if (pxframe) {
 796                 list_del_init(&pxframe->list);
 797                 pxmitpriv->free_xmitframe_cnt--;
 798                 pxframe->buf_addr = NULL;
 799                 pxframe->pxmitbuf = NULL;
 800                 pxframe->attrib.psta = NULL;
 801                 pxframe->pkt = NULL;
 802         }
 803         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 804         return pxframe;
 805 }
 806 
 807 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
 808                           struct xmit_frame *pxmitframe)
 809 {
 810         unsigned long irqL;
 811         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 812         struct _adapter *padapter = pxmitpriv->adapter;
 813 
 814         if (pxmitframe == NULL)
 815                 return;
 816         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 817         list_del_init(&pxmitframe->list);
 818         if (pxmitframe->pkt)
 819                 pxmitframe->pkt = NULL;
 820         list_add_tail(&pxmitframe->list, &pfree_xmit_queue->queue);
 821         pxmitpriv->free_xmitframe_cnt++;
 822         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 823         if (netif_queue_stopped(padapter->pnetdev))
 824                 netif_wake_queue(padapter->pnetdev);
 825 }
 826 
 827 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
 828                       struct xmit_frame *pxmitframe)
 829 {
 830         if (pxmitframe == NULL)
 831                 return;
 832         if (pxmitframe->frame_tag == DATA_FRAMETAG)
 833                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 834 }
 835 
 836 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
 837                                 struct  __queue *pframequeue)
 838 {
 839         unsigned long irqL;
 840         struct list_head *plist, *phead;
 841         struct  xmit_frame      *pxmitframe;
 842 
 843         spin_lock_irqsave(&(pframequeue->lock), irqL);
 844         phead = &pframequeue->queue;
 845         plist = phead->next;
 846         while (!end_of_queue_search(phead, plist)) {
 847                 pxmitframe = container_of(plist, struct xmit_frame, list);
 848                 plist = plist->next;
 849                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 850         }
 851         spin_unlock_irqrestore(&(pframequeue->lock), irqL);
 852 }
 853 
 854 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
 855                                                struct  __queue **ppstapending,
 856                                                struct sta_info *psta, sint up)
 857 {
 858 
 859         struct tx_servq *ptxservq;
 860         struct hw_xmit *phwxmits =  padapter->xmitpriv.hwxmits;
 861 
 862         switch (up) {
 863         case 1:
 864         case 2:
 865                 ptxservq = &(psta->sta_xmitpriv.bk_q);
 866                 *ppstapending = &padapter->xmitpriv.bk_pending;
 867                 (phwxmits + 3)->accnt++;
 868                 break;
 869         case 4:
 870         case 5:
 871                 ptxservq = &(psta->sta_xmitpriv.vi_q);
 872                 *ppstapending = &padapter->xmitpriv.vi_pending;
 873                 (phwxmits + 1)->accnt++;
 874                 break;
 875         case 6:
 876         case 7:
 877                 ptxservq = &(psta->sta_xmitpriv.vo_q);
 878                 *ppstapending = &padapter->xmitpriv.vo_pending;
 879                 (phwxmits + 0)->accnt++;
 880                 break;
 881         case 0:
 882         case 3:
 883         default:
 884                 ptxservq = &(psta->sta_xmitpriv.be_q);
 885                 *ppstapending = &padapter->xmitpriv.be_pending;
 886                 (phwxmits + 2)->accnt++;
 887                 break;
 888         }
 889         return ptxservq;
 890 }
 891 
 892 /*
 893  * Will enqueue pxmitframe to the proper queue, and indicate it
 894  * to xx_pending list.....
 895  */
 896 int r8712_xmit_classifier(struct _adapter *padapter,
 897                           struct xmit_frame *pxmitframe)
 898 {
 899         unsigned long irqL0;
 900         struct  __queue *pstapending;
 901         struct sta_info *psta;
 902         struct tx_servq *ptxservq;
 903         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 904         struct sta_priv *pstapriv = &padapter->stapriv;
 905         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 906         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 907 
 908         if (pattrib->psta) {
 909                 psta = pattrib->psta;
 910         } else {
 911                 if (bmcst) {
 912                         psta = r8712_get_bcmc_stainfo(padapter);
 913                 } else {
 914                         if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
 915                                 psta = r8712_get_stainfo(pstapriv,
 916                                        get_bssid(pmlmepriv));
 917                         else
 918                                 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 919                 }
 920         }
 921         if (psta == NULL)
 922                 return -EINVAL;
 923         ptxservq = get_sta_pending(padapter, &pstapending,
 924                    psta, pattrib->priority);
 925         spin_lock_irqsave(&pstapending->lock, irqL0);
 926         if (list_empty(&ptxservq->tx_pending))
 927                 list_add_tail(&ptxservq->tx_pending, &pstapending->queue);
 928         list_add_tail(&pxmitframe->list, &ptxservq->sta_pending.queue);
 929         ptxservq->qcnt++;
 930         spin_unlock_irqrestore(&pstapending->lock, irqL0);
 931         return 0;
 932 }
 933 
 934 static void alloc_hwxmits(struct _adapter *padapter)
 935 {
 936         struct hw_xmit *hwxmits;
 937         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 938 
 939         pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
 940         pxmitpriv->hwxmits = kmalloc_array(pxmitpriv->hwxmit_entry,
 941                                 sizeof(struct hw_xmit), GFP_ATOMIC);
 942         if (!pxmitpriv->hwxmits)
 943                 return;
 944         hwxmits = pxmitpriv->hwxmits;
 945         if (pxmitpriv->hwxmit_entry == 5) {
 946                 pxmitpriv->bmc_txqueue.head = 0;
 947                 hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
 948                 hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
 949                 pxmitpriv->vo_txqueue.head = 0;
 950                 hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
 951                 hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
 952                 pxmitpriv->vi_txqueue.head = 0;
 953                 hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
 954                 hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
 955                 pxmitpriv->bk_txqueue.head = 0;
 956                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 957                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 958                 pxmitpriv->be_txqueue.head = 0;
 959                 hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
 960                 hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
 961         } else if (pxmitpriv->hwxmit_entry == 4) {
 962                 pxmitpriv->vo_txqueue.head = 0;
 963                 hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
 964                 hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
 965                 pxmitpriv->vi_txqueue.head = 0;
 966                 hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
 967                 hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
 968                 pxmitpriv->be_txqueue.head = 0;
 969                 hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
 970                 hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
 971                 pxmitpriv->bk_txqueue.head = 0;
 972                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 973                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 974         }
 975 }
 976 
 977 static void free_hwxmits(struct _adapter *padapter)
 978 {
 979         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 980 
 981         kfree(pxmitpriv->hwxmits);
 982 }
 983 
 984 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
 985 {
 986         sint i;
 987 
 988         for (i = 0; i < entry; i++, phwxmit++) {
 989                 spin_lock_init(&phwxmit->xmit_lock);
 990                 INIT_LIST_HEAD(&phwxmit->pending);
 991                 phwxmit->txcmdcnt = 0;
 992                 phwxmit->accnt = 0;
 993         }
 994 }
 995 
 996 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
 997                         struct xmit_buf *pxmitbuf)
 998 {
 999         /* pxmitbuf attach to pxmitframe */
1000         pxmitframe->pxmitbuf = pxmitbuf;
1001         /* urb and irp connection */
1002         pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
1003         /* buffer addr assoc */
1004         pxmitframe->buf_addr = pxmitbuf->pbuf;
1005         /* pxmitframe attach to pxmitbuf */
1006         pxmitbuf->priv_data = pxmitframe;
1007 }
1008 
1009 /*
1010  * tx_action == 0 == no frames to transmit
1011  * tx_action > 0 ==> we have frames to transmit
1012  * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1013  *                                               to transmit 1 frame.
1014  */
1015 
1016 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1017 {
1018         unsigned long irqL;
1019         int ret;
1020         struct xmit_buf *pxmitbuf = NULL;
1021         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1022         struct pkt_attrib *pattrib = &pxmitframe->attrib;
1023 
1024         r8712_do_queue_select(padapter, pattrib);
1025         spin_lock_irqsave(&pxmitpriv->lock, irqL);
1026         if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1027                 ret = false;
1028                 r8712_xmit_enqueue(padapter, pxmitframe);
1029                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1030                 return ret;
1031         }
1032         pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1033         if (pxmitbuf == NULL) { /*enqueue packet*/
1034                 ret = false;
1035                 r8712_xmit_enqueue(padapter, pxmitframe);
1036                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1037         } else { /*dump packet directly*/
1038                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1039                 ret = true;
1040                 xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1041                 r8712_xmit_direct(padapter, pxmitframe);
1042         }
1043         return ret;
1044 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/staging/rtl8712/rtl871x_xmit.c

DEFINITIONS
