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