drivers/staging/rtl8192e/rtl819x_TSProc.c

   1 /******************************************************************************
   2  * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
   3  *
   4  * This program is distributed in the hope that it will be useful, but WITHOUT
   5  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   6  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   7  * more details.
   8  *
   9  * You should have received a copy of the GNU General Public License along with
  10  * this program; if not, write to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  12  *
  13  * The full GNU General Public License is included in this distribution in the
  14  * file called LICENSE.
  15  *
  16  * Contact Information:
  17  * wlanfae <wlanfae@realtek.com>
  18 ******************************************************************************/
  19 #include "rtllib.h"
  20 #include <linux/etherdevice.h>
  21 #include "rtl819x_TS.h"
  22
  23 static void TsSetupTimeOut(unsigned long data)
  24 {
  25 }
  26
  27 static void TsInactTimeout(unsigned long data)
  28 {
  29 }
  30
  31 static void RxPktPendingTimeout(unsigned long data)
  32 {
  33         struct rx_ts_record *pRxTs = (struct rx_ts_record *)data;
  34         struct rtllib_device *ieee = container_of(pRxTs, struct rtllib_device,
  35                                                   RxTsRecord[pRxTs->num]);
  36
  37         struct rx_reorder_entry *pReorderEntry = NULL;
  38
  39         unsigned long flags = 0;
  40         u8 index = 0;
  41         bool bPktInBuf = false;
  42
  43         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
  44         if (pRxTs->RxTimeoutIndicateSeq != 0xffff) {
  45                 while (!list_empty(&pRxTs->RxPendingPktList)) {
  46                         pReorderEntry = (struct rx_reorder_entry *)
  47                                         list_entry(pRxTs->RxPendingPktList.prev,
  48                                         struct rx_reorder_entry, List);
  49                         if (index == 0)
  50                                 pRxTs->RxIndicateSeq = pReorderEntry->SeqNum;
  51
  52                         if (SN_LESS(pReorderEntry->SeqNum, pRxTs->RxIndicateSeq) ||
  53                                 SN_EQUAL(pReorderEntry->SeqNum, pRxTs->RxIndicateSeq)) {
  54                                 list_del_init(&pReorderEntry->List);
  55
  56                                 if (SN_EQUAL(pReorderEntry->SeqNum,
  57                                     pRxTs->RxIndicateSeq))
  58                                         pRxTs->RxIndicateSeq =
  59                                               (pRxTs->RxIndicateSeq + 1) % 4096;
  60
  61                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate"
  62                                              " SeqNum: %d\n", __func__,
  63                                              pReorderEntry->SeqNum);
  64                                 ieee->stats_IndicateArray[index] =
  65                                                          pReorderEntry->prxb;
  66                                 index++;
  67
  68                                 list_add_tail(&pReorderEntry->List,
  69                                               &ieee->RxReorder_Unused_List);
  70                         } else {
  71                                 bPktInBuf = true;
  72                                 break;
  73                         }
  74                 }
  75         }
  76
  77         if (index > 0) {
  78                 pRxTs->RxTimeoutIndicateSeq = 0xffff;
  79
  80                 if (index > REORDER_WIN_SIZE) {
  81                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
  82                                      " Rx Reorer struct buffer full!!\n");
  83                         spin_unlock_irqrestore(&(ieee->reorder_spinlock),
  84                                                flags);
  85                         return;
  86                 }
  87                 rtllib_indicate_packets(ieee, ieee->stats_IndicateArray, index);
  88                 bPktInBuf = false;
  89         }
  90
  91         if (bPktInBuf && (pRxTs->RxTimeoutIndicateSeq == 0xffff)) {
  92                 pRxTs->RxTimeoutIndicateSeq = pRxTs->RxIndicateSeq;
  93                 mod_timer(&pRxTs->RxPktPendingTimer,  jiffies +
  94                           MSECS(ieee->pHTInfo->RxReorderPendingTime));
  95         }
  96         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
  97 }
  98
  99 static void TsAddBaProcess(unsigned long data)
 100 {
 101         struct tx_ts_record *pTxTs = (struct tx_ts_record *)data;
 102         u8 num = pTxTs->num;
 103         struct rtllib_device *ieee = container_of(pTxTs, struct rtllib_device,
 104                                      TxTsRecord[num]);
 105
 106         TsInitAddBA(ieee, pTxTs, BA_POLICY_IMMEDIATE, false);
 107         RTLLIB_DEBUG(RTLLIB_DL_BA, "TsAddBaProcess(): ADDBA Req is "
 108                      "started!!\n");
 109 }
 110
 111 static void ResetTsCommonInfo(struct ts_common_info *pTsCommonInfo)
 112 {
 113         memset(pTsCommonInfo->Addr, 0, 6);
 114         memset(&pTsCommonInfo->TSpec, 0, sizeof(union tspec_body));
 115         memset(&pTsCommonInfo->TClass, 0, sizeof(union qos_tclas)*TCLAS_NUM);
 116         pTsCommonInfo->TClasProc = 0;
 117         pTsCommonInfo->TClasNum = 0;
 118 }
 119
 120 static void ResetTxTsEntry(struct tx_ts_record *pTS)
 121 {
 122         ResetTsCommonInfo(&pTS->TsCommonInfo);
 123         pTS->TxCurSeq = 0;
 124         pTS->bAddBaReqInProgress = false;
 125         pTS->bAddBaReqDelayed = false;
 126         pTS->bUsingBa = false;
 127         pTS->bDisable_AddBa = false;
 128         ResetBaEntry(&pTS->TxAdmittedBARecord);
 129         ResetBaEntry(&pTS->TxPendingBARecord);
 130 }
 131
 132 static void ResetRxTsEntry(struct rx_ts_record *pTS)
 133 {
 134         ResetTsCommonInfo(&pTS->TsCommonInfo);
 135         pTS->RxIndicateSeq = 0xffff;
 136         pTS->RxTimeoutIndicateSeq = 0xffff;
 137         ResetBaEntry(&pTS->RxAdmittedBARecord);
 138 }
 139
 140 void TSInitialize(struct rtllib_device *ieee)
 141 {
 142         struct tx_ts_record *pTxTS  = ieee->TxTsRecord;
 143         struct rx_ts_record *pRxTS  = ieee->RxTsRecord;
 144         struct rx_reorder_entry *pRxReorderEntry = ieee->RxReorderEntry;
 145         u8                              count = 0;
 146         RTLLIB_DEBUG(RTLLIB_DL_TS, "==========>%s()\n", __func__);
 147         INIT_LIST_HEAD(&ieee->Tx_TS_Admit_List);
 148         INIT_LIST_HEAD(&ieee->Tx_TS_Pending_List);
 149         INIT_LIST_HEAD(&ieee->Tx_TS_Unused_List);
 150
 151         for (count = 0; count < TOTAL_TS_NUM; count++) {
 152                 pTxTS->num = count;
 153                 _setup_timer(&pTxTS->TsCommonInfo.SetupTimer,
 154                             TsSetupTimeOut,
 155                             (unsigned long) pTxTS);
 156
 157                 _setup_timer(&pTxTS->TsCommonInfo.InactTimer,
 158                             TsInactTimeout,
 159                             (unsigned long) pTxTS);
 160
 161                 _setup_timer(&pTxTS->TsAddBaTimer,
 162                             TsAddBaProcess,
 163                             (unsigned long) pTxTS);
 164
 165                 _setup_timer(&pTxTS->TxPendingBARecord.Timer,
 166                             BaSetupTimeOut,
 167                             (unsigned long) pTxTS);
 168                 _setup_timer(&pTxTS->TxAdmittedBARecord.Timer,
 169                             TxBaInactTimeout,
 170                             (unsigned long) pTxTS);
 171
 172                 ResetTxTsEntry(pTxTS);
 173                 list_add_tail(&pTxTS->TsCommonInfo.List,
 174                                 &ieee->Tx_TS_Unused_List);
 175                 pTxTS++;
 176         }
 177
 178         INIT_LIST_HEAD(&ieee->Rx_TS_Admit_List);
 179         INIT_LIST_HEAD(&ieee->Rx_TS_Pending_List);
 180         INIT_LIST_HEAD(&ieee->Rx_TS_Unused_List);
 181         for (count = 0; count < TOTAL_TS_NUM; count++) {
 182                 pRxTS->num = count;
 183                 INIT_LIST_HEAD(&pRxTS->RxPendingPktList);
 184
 185                 _setup_timer(&pRxTS->TsCommonInfo.SetupTimer,
 186                             TsSetupTimeOut,
 187                             (unsigned long) pRxTS);
 188
 189                 _setup_timer(&pRxTS->TsCommonInfo.InactTimer,
 190                             TsInactTimeout,
 191                             (unsigned long) pRxTS);
 192
 193                 _setup_timer(&pRxTS->RxAdmittedBARecord.Timer,
 194                             RxBaInactTimeout,
 195                             (unsigned long) pRxTS);
 196
 197                 _setup_timer(&pRxTS->RxPktPendingTimer,
 198                             RxPktPendingTimeout,
 199                             (unsigned long) pRxTS);
 200
 201                 ResetRxTsEntry(pRxTS);
 202                 list_add_tail(&pRxTS->TsCommonInfo.List,
 203                               &ieee->Rx_TS_Unused_List);
 204                 pRxTS++;
 205         }
 206         INIT_LIST_HEAD(&ieee->RxReorder_Unused_List);
 207         for (count = 0; count < REORDER_ENTRY_NUM; count++) {
 208                 list_add_tail(&pRxReorderEntry->List,
 209                               &ieee->RxReorder_Unused_List);
 210                 if (count == (REORDER_ENTRY_NUM-1))
 211                         break;
 212                 pRxReorderEntry = &ieee->RxReorderEntry[count+1];
 213         }
 214
 215 }
 216
 217 static void AdmitTS(struct rtllib_device *ieee,
 218                     struct ts_common_info *pTsCommonInfo, u32 InactTime)
 219 {
 220         del_timer_sync(&pTsCommonInfo->SetupTimer);
 221         del_timer_sync(&pTsCommonInfo->InactTimer);
 222
 223         if (InactTime != 0)
 224                 mod_timer(&pTsCommonInfo->InactTimer, jiffies +
 225                           MSECS(InactTime));
 226 }
 227
 228 static struct ts_common_info *SearchAdmitTRStream(struct rtllib_device *ieee,
 229                                                   u8 *Addr, u8 TID,
 230                                                   enum tr_select TxRxSelect)
 231 {
 232         u8      dir;
 233         bool    search_dir[4] = {0};
 234         struct list_head *psearch_list;
 235         struct ts_common_info *pRet = NULL;
 236         if (ieee->iw_mode == IW_MODE_MASTER) {
 237                 if (TxRxSelect == TX_DIR) {
 238                         search_dir[DIR_DOWN] = true;
 239                         search_dir[DIR_BI_DIR] = true;
 240                 } else {
 241                         search_dir[DIR_UP] = true;
 242                         search_dir[DIR_BI_DIR] = true;
 243                 }
 244         } else if (ieee->iw_mode == IW_MODE_ADHOC) {
 245                 if (TxRxSelect == TX_DIR)
 246                         search_dir[DIR_UP] = true;
 247                 else
 248                         search_dir[DIR_DOWN] = true;
 249         } else {
 250                 if (TxRxSelect == TX_DIR) {
 251                         search_dir[DIR_UP] = true;
 252                         search_dir[DIR_BI_DIR] = true;
 253                         search_dir[DIR_DIRECT] = true;
 254                 } else {
 255                         search_dir[DIR_DOWN] = true;
 256                         search_dir[DIR_BI_DIR] = true;
 257                         search_dir[DIR_DIRECT] = true;
 258                 }
 259         }
 260
 261         if (TxRxSelect == TX_DIR)
 262                 psearch_list = &ieee->Tx_TS_Admit_List;
 263         else
 264                 psearch_list = &ieee->Rx_TS_Admit_List;
 265
 266         for (dir = 0; dir <= DIR_BI_DIR; dir++) {
 267                 if (search_dir[dir] == false)
 268                         continue;
 269                 list_for_each_entry(pRet, psearch_list, List) {
 270                         if (memcmp(pRet->Addr, Addr, 6) == 0)
 271                                 if (pRet->TSpec.f.TSInfo.field.ucTSID == TID)
 272                                         if (pRet->TSpec.f.TSInfo.field.ucDirection == dir)
 273                                                 break;
 274
 275                 }
 276                 if (&pRet->List  != psearch_list)
 277                         break;
 278         }
 279
 280         if (pRet && &pRet->List  != psearch_list)
 281                 return pRet ;
 282         else
 283                 return NULL;
 284 }
 285
 286 static void MakeTSEntry(struct ts_common_info *pTsCommonInfo, u8 *Addr,
 287                         union tspec_body *pTSPEC, union qos_tclas *pTCLAS,
 288                         u8 TCLAS_Num, u8 TCLAS_Proc)
 289 {
 290         u8      count;
 291
 292         if (pTsCommonInfo == NULL)
 293                 return;
 294
 295         memcpy(pTsCommonInfo->Addr, Addr, 6);
 296
 297         if (pTSPEC != NULL)
 298                 memcpy((u8 *)(&(pTsCommonInfo->TSpec)), (u8 *)pTSPEC,
 299                         sizeof(union tspec_body));
 300
 301         for (count = 0; count < TCLAS_Num; count++)
 302                 memcpy((u8 *)(&(pTsCommonInfo->TClass[count])),
 303                        (u8 *)pTCLAS, sizeof(union qos_tclas));
 304
 305         pTsCommonInfo->TClasProc = TCLAS_Proc;
 306         pTsCommonInfo->TClasNum = TCLAS_Num;
 307 }
 308
 309 bool GetTs(struct rtllib_device *ieee, struct ts_common_info **ppTS,
 310            u8 *Addr, u8 TID, enum tr_select TxRxSelect, bool bAddNewTs)
 311 {
 312         u8      UP = 0;
 313         if (is_broadcast_ether_addr(Addr) || is_multicast_ether_addr(Addr)) {
 314                 RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR! get TS for Broadcast or "
 315                              "Multicast\n");
 316                 return false;
 317         }
 318         if (ieee->current_network.qos_data.supported == 0) {
 319                 UP = 0;
 320         } else {
 321                 if (!IsACValid(TID)) {
 322                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR! in %s(), TID(%d) is "
 323                                      "not valid\n", __func__, TID);
 324                         return false;
 325                 }
 326
 327                 switch (TID) {
 328                 case 0:
 329                 case 3:
 330                         UP = 0;
 331                         break;
 332                 case 1:
 333                 case 2:
 334                         UP = 2;
 335                         break;
 336                 case 4:
 337                 case 5:
 338                         UP = 5;
 339                         break;
 340                 case 6:
 341                 case 7:
 342                         UP = 7;
 343                         break;
 344                 }
 345         }
 346
 347         *ppTS = SearchAdmitTRStream(ieee, Addr, UP, TxRxSelect);
 348         if (*ppTS != NULL) {
 349                 return true;
 350         } else {
 351                 if (bAddNewTs == false) {
 352                         RTLLIB_DEBUG(RTLLIB_DL_TS, "add new TS failed"
 353                                      "(tid:%d)\n", UP);
 354                         return false;
 355                 } else {
 356                         union tspec_body TSpec;
 357                         union qos_tsinfo *pTSInfo = &TSpec.f.TSInfo;
 358                         struct list_head *pUnusedList =
 359                                 (TxRxSelect == TX_DIR) ?
 360                                 (&ieee->Tx_TS_Unused_List) :
 361                                 (&ieee->Rx_TS_Unused_List);
 362
 363                         struct list_head *pAddmitList =
 364                                 (TxRxSelect == TX_DIR) ?
 365                                 (&ieee->Tx_TS_Admit_List) :
 366                                 (&ieee->Rx_TS_Admit_List);
 367
 368                         enum direction_value Dir =
 369                                  (ieee->iw_mode == IW_MODE_MASTER) ?
 370                                  ((TxRxSelect == TX_DIR) ? DIR_DOWN : DIR_UP) :
 371                                  ((TxRxSelect == TX_DIR) ? DIR_UP : DIR_DOWN);
 372                         RTLLIB_DEBUG(RTLLIB_DL_TS, "to add Ts\n");
 373                         if (!list_empty(pUnusedList)) {
 374                                 (*ppTS) = list_entry(pUnusedList->next,
 375                                           struct ts_common_info, List);
 376                                 list_del_init(&(*ppTS)->List);
 377                                 if (TxRxSelect == TX_DIR) {
 378                                         struct tx_ts_record *tmp =
 379                                                 container_of(*ppTS,
 380                                                 struct tx_ts_record,
 381                                                 TsCommonInfo);
 382                                         ResetTxTsEntry(tmp);
 383                                 } else {
 384                                         struct rx_ts_record *tmp =
 385                                                  container_of(*ppTS,
 386                                                  struct rx_ts_record,
 387                                                  TsCommonInfo);
 388                                         ResetRxTsEntry(tmp);
 389                                 }
 390
 391                                 RTLLIB_DEBUG(RTLLIB_DL_TS, "to init current TS"
 392                                              ", UP:%d, Dir:%d, addr: %pM"
 393                                              " ppTs=%p\n", UP, Dir,
 394                                               Addr, *ppTS);
 395                                 pTSInfo->field.ucTrafficType = 0;
 396                                 pTSInfo->field.ucTSID = UP;
 397                                 pTSInfo->field.ucDirection = Dir;
 398                                 pTSInfo->field.ucAccessPolicy = 1;
 399                                 pTSInfo->field.ucAggregation = 0;
 400                                 pTSInfo->field.ucPSB = 0;
 401                                 pTSInfo->field.ucUP = UP;
 402                                 pTSInfo->field.ucTSInfoAckPolicy = 0;
 403                                 pTSInfo->field.ucSchedule = 0;
 404
 405                                 MakeTSEntry(*ppTS, Addr, &TSpec, NULL, 0, 0);
 406                                 AdmitTS(ieee, *ppTS, 0);
 407                                 list_add_tail(&((*ppTS)->List), pAddmitList);
 408
 409                                 return true;
 410                         } else {
 411                                 RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!in function "
 412                                              "%s() There is not enough dir=%d"
 413                                              "(0=up down=1) TS record to be "
 414                                              "used!!", __func__, Dir);
 415                                 return false;
 416                         }
 417                 }
 418         }
 419 }
 420
 421 static void RemoveTsEntry(struct rtllib_device *ieee, struct ts_common_info *pTs,
 422                           enum tr_select TxRxSelect)
 423 {
 424         del_timer_sync(&pTs->SetupTimer);
 425         del_timer_sync(&pTs->InactTimer);
 426         TsInitDelBA(ieee, pTs, TxRxSelect);
 427
 428         if (TxRxSelect == RX_DIR) {
 429                 struct rx_reorder_entry *pRxReorderEntry;
 430                 struct rx_ts_record *pRxTS = (struct rx_ts_record *)pTs;
 431
 432                 if (timer_pending(&pRxTS->RxPktPendingTimer))
 433                         del_timer_sync(&pRxTS->RxPktPendingTimer);
 434
 435                 while (!list_empty(&pRxTS->RxPendingPktList)) {
 436                         pRxReorderEntry = (struct rx_reorder_entry *)
 437                                         list_entry(pRxTS->RxPendingPktList.prev,
 438                                         struct rx_reorder_entry, List);
 439                         RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Delete SeqNum "
 440                                      "%d!\n", __func__,
 441                                      pRxReorderEntry->SeqNum);
 442                         list_del_init(&pRxReorderEntry->List);
 443                         {
 444                                 int i = 0;
 445                                 struct rtllib_rxb *prxb = pRxReorderEntry->prxb;
 446                                 if (unlikely(!prxb))
 447                                         return;
 448                                 for (i = 0; i < prxb->nr_subframes; i++)
 449                                         dev_kfree_skb(prxb->subframes[i]);
 450                                 kfree(prxb);
 451                                 prxb = NULL;
 452                         }
 453                         list_add_tail(&pRxReorderEntry->List,
 454                                       &ieee->RxReorder_Unused_List);
 455                 }
 456         } else {
 457                 struct tx_ts_record *pTxTS = (struct tx_ts_record *)pTs;
 458                 del_timer_sync(&pTxTS->TsAddBaTimer);
 459         }
 460 }
 461
 462 void RemovePeerTS(struct rtllib_device *ieee, u8 *Addr)
 463 {
 464         struct ts_common_info *pTS, *pTmpTS;
 465         printk(KERN_INFO "===========>RemovePeerTS, %pM\n", Addr);
 466
 467         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Pending_List, List) {
 468                 if (memcmp(pTS->Addr, Addr, 6) == 0) {
 469                         RemoveTsEntry(ieee, pTS, TX_DIR);
 470                         list_del_init(&pTS->List);
 471                         list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
 472                 }
 473         }
 474
 475         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Admit_List, List) {
 476                 if (memcmp(pTS->Addr, Addr, 6) == 0) {
 477                         printk(KERN_INFO "====>remove Tx_TS_admin_list\n");
 478                         RemoveTsEntry(ieee, pTS, TX_DIR);
 479                         list_del_init(&pTS->List);
 480                         list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
 481                 }
 482         }
 483
 484         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Pending_List, List) {
 485                 if (memcmp(pTS->Addr, Addr, 6) == 0) {
 486                         RemoveTsEntry(ieee, pTS, RX_DIR);
 487                         list_del_init(&pTS->List);
 488                         list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
 489                 }
 490         }
 491
 492         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Admit_List, List) {
 493                 if (memcmp(pTS->Addr, Addr, 6) == 0) {
 494                         RemoveTsEntry(ieee, pTS, RX_DIR);
 495                         list_del_init(&pTS->List);
 496                         list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
 497                 }
 498         }
 499 }
 500
 501 void RemoveAllTS(struct rtllib_device *ieee)
 502 {
 503         struct ts_common_info *pTS, *pTmpTS;
 504
 505         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Pending_List, List) {
 506                 RemoveTsEntry(ieee, pTS, TX_DIR);
 507                 list_del_init(&pTS->List);
 508                 list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
 509         }
 510
 511         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Admit_List, List) {
 512                 RemoveTsEntry(ieee, pTS, TX_DIR);
 513                 list_del_init(&pTS->List);
 514                 list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
 515         }
 516
 517         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Pending_List, List) {
 518                 RemoveTsEntry(ieee, pTS, RX_DIR);
 519                 list_del_init(&pTS->List);
 520                 list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
 521         }
 522
 523         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Admit_List, List) {
 524                 RemoveTsEntry(ieee, pTS, RX_DIR);
 525                 list_del_init(&pTS->List);
 526                 list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
 527         }
 528 }
 529
 530 void TsStartAddBaProcess(struct rtllib_device *ieee, struct tx_ts_record *pTxTS)
 531 {
 532         if (pTxTS->bAddBaReqInProgress == false) {
 533                 pTxTS->bAddBaReqInProgress = true;
 534
 535                 if (pTxTS->bAddBaReqDelayed) {
 536                         RTLLIB_DEBUG(RTLLIB_DL_BA, "TsStartAddBaProcess(): "
 537                                      "Delayed Start ADDBA after 60 sec!!\n");
 538                         mod_timer(&pTxTS->TsAddBaTimer, jiffies +
 539                                   MSECS(TS_ADDBA_DELAY));
 540                 } else {
 541                         RTLLIB_DEBUG(RTLLIB_DL_BA, "TsStartAddBaProcess(): "
 542                                      "Immediately Start ADDBA now!!\n");
 543                         mod_timer(&pTxTS->TsAddBaTimer, jiffies+10);
 544                 }
 545         } else
 546                 RTLLIB_DEBUG(RTLLIB_DL_BA, "%s()==>BA timer is already added\n",
 547                              __func__);
 548 }