drivers/staging/rtl8192e/rtl819x_TSProc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
   4  *
   5  * Contact Information: wlanfae <wlanfae@realtek.com>
   6  */
   7 #include "rtllib.h"
   8 #include <linux/etherdevice.h>
   9 #include "rtl819x_TS.h"
  10
  11 static void TsSetupTimeOut(struct timer_list *unused)
  12 {
  13 }
  14
  15 static void TsInactTimeout(struct timer_list *unused)
  16 {
  17 }
  18
  19 static void RxPktPendingTimeout(struct timer_list *t)
  20 {
  21         struct rx_ts_record *pRxTs = from_timer(pRxTs, t,
  22                                                      rx_pkt_pending_timer);
  23         struct rtllib_device *ieee = container_of(pRxTs, struct rtllib_device,
  24                                                   RxTsRecord[pRxTs->num]);
  25
  26         struct rx_reorder_entry *pReorderEntry = NULL;
  27
  28         unsigned long flags = 0;
  29         u8 index = 0;
  30         bool bPktInBuf = false;
  31
  32         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
  33         if (pRxTs->rx_timeout_indicate_seq != 0xffff) {
  34                 while (!list_empty(&pRxTs->rx_pending_pkt_list)) {
  35                         pReorderEntry = (struct rx_reorder_entry *)
  36                                         list_entry(pRxTs->rx_pending_pkt_list.prev,
  37                                         struct rx_reorder_entry, List);
  38                         if (index == 0)
  39                                 pRxTs->rx_indicate_seq = pReorderEntry->SeqNum;
  40
  41                         if (SN_LESS(pReorderEntry->SeqNum,
  42                                     pRxTs->rx_indicate_seq) ||
  43                             SN_EQUAL(pReorderEntry->SeqNum,
  44                                      pRxTs->rx_indicate_seq)) {
  45                                 list_del_init(&pReorderEntry->List);
  46
  47                                 if (SN_EQUAL(pReorderEntry->SeqNum,
  48                                     pRxTs->rx_indicate_seq))
  49                                         pRxTs->rx_indicate_seq =
  50                                               (pRxTs->rx_indicate_seq + 1) % 4096;
  51
  52                                 netdev_dbg(ieee->dev,
  53                                            "%s(): Indicate SeqNum: %d\n",
  54                                            __func__, pReorderEntry->SeqNum);
  55                                 ieee->stats_IndicateArray[index] =
  56                                                          pReorderEntry->prxb;
  57                                 index++;
  58
  59                                 list_add_tail(&pReorderEntry->List,
  60                                               &ieee->RxReorder_Unused_List);
  61                         } else {
  62                                 bPktInBuf = true;
  63                                 break;
  64                         }
  65                 }
  66         }
  67
  68         if (index > 0) {
  69                 pRxTs->rx_timeout_indicate_seq = 0xffff;
  70
  71                 if (index > REORDER_WIN_SIZE) {
  72                         netdev_warn(ieee->dev,
  73                                     "%s(): Rx Reorder struct buffer full\n",
  74                                     __func__);
  75                         spin_unlock_irqrestore(&(ieee->reorder_spinlock),
  76                                                flags);
  77                         return;
  78                 }
  79                 rtllib_indicate_packets(ieee, ieee->stats_IndicateArray, index);
  80                 bPktInBuf = false;
  81         }
  82
  83         if (bPktInBuf && (pRxTs->rx_timeout_indicate_seq == 0xffff)) {
  84                 pRxTs->rx_timeout_indicate_seq = pRxTs->rx_indicate_seq;
  85                 mod_timer(&pRxTs->rx_pkt_pending_timer,  jiffies +
  86                           msecs_to_jiffies(ieee->pHTInfo->RxReorderPendingTime)
  87                           );
  88         }
  89         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
  90 }
  91
  92 static void TsAddBaProcess(struct timer_list *t)
  93 {
  94         struct tx_ts_record *pTxTs = from_timer(pTxTs, t, TsAddBaTimer);
  95         u8 num = pTxTs->num;
  96         struct rtllib_device *ieee = container_of(pTxTs, struct rtllib_device,
  97                                      TxTsRecord[num]);
  98
  99         TsInitAddBA(ieee, pTxTs, BA_POLICY_IMMEDIATE, false);
 100         netdev_dbg(ieee->dev, "%s(): ADDBA Req is started\n", __func__);
 101 }
 102
 103 static void ResetTsCommonInfo(struct ts_common_info *pTsCommonInfo)
 104 {
 105         eth_zero_addr(pTsCommonInfo->Addr);
 106         memset(&pTsCommonInfo->TSpec, 0, sizeof(union tspec_body));
 107         memset(&pTsCommonInfo->TClass, 0, sizeof(union qos_tclas) * TCLAS_NUM);
 108         pTsCommonInfo->TClasProc = 0;
 109         pTsCommonInfo->TClasNum = 0;
 110 }
 111
 112 static void ResetTxTsEntry(struct tx_ts_record *pTS)
 113 {
 114         ResetTsCommonInfo(&pTS->TsCommonInfo);
 115         pTS->TxCurSeq = 0;
 116         pTS->bAddBaReqInProgress = false;
 117         pTS->bAddBaReqDelayed = false;
 118         pTS->bUsingBa = false;
 119         pTS->bDisable_AddBa = false;
 120         ResetBaEntry(&pTS->TxAdmittedBARecord);
 121         ResetBaEntry(&pTS->TxPendingBARecord);
 122 }
 123
 124 static void ResetRxTsEntry(struct rx_ts_record *pTS)
 125 {
 126         ResetTsCommonInfo(&pTS->ts_common_info);
 127         pTS->rx_indicate_seq = 0xffff;
 128         pTS->rx_timeout_indicate_seq = 0xffff;
 129         ResetBaEntry(&pTS->rx_admitted_ba_record);
 130 }
 131
 132 void TSInitialize(struct rtllib_device *ieee)
 133 {
 134         struct tx_ts_record *pTxTS  = ieee->TxTsRecord;
 135         struct rx_ts_record *pRxTS  = ieee->RxTsRecord;
 136         struct rx_reorder_entry *pRxReorderEntry = ieee->RxReorderEntry;
 137         u8                              count = 0;
 138
 139         INIT_LIST_HEAD(&ieee->Tx_TS_Admit_List);
 140         INIT_LIST_HEAD(&ieee->Tx_TS_Pending_List);
 141         INIT_LIST_HEAD(&ieee->Tx_TS_Unused_List);
 142
 143         for (count = 0; count < TOTAL_TS_NUM; count++) {
 144                 pTxTS->num = count;
 145                 timer_setup(&pTxTS->TsCommonInfo.SetupTimer, TsSetupTimeOut,
 146                             0);
 147
 148                 timer_setup(&pTxTS->TsCommonInfo.InactTimer, TsInactTimeout,
 149                             0);
 150
 151                 timer_setup(&pTxTS->TsAddBaTimer, TsAddBaProcess, 0);
 152
 153                 timer_setup(&pTxTS->TxPendingBARecord.timer, BaSetupTimeOut,
 154                             0);
 155                 timer_setup(&pTxTS->TxAdmittedBARecord.timer,
 156                             TxBaInactTimeout, 0);
 157
 158                 ResetTxTsEntry(pTxTS);
 159                 list_add_tail(&pTxTS->TsCommonInfo.List,
 160                                 &ieee->Tx_TS_Unused_List);
 161                 pTxTS++;
 162         }
 163
 164         INIT_LIST_HEAD(&ieee->Rx_TS_Admit_List);
 165         INIT_LIST_HEAD(&ieee->Rx_TS_Pending_List);
 166         INIT_LIST_HEAD(&ieee->Rx_TS_Unused_List);
 167         for (count = 0; count < TOTAL_TS_NUM; count++) {
 168                 pRxTS->num = count;
 169                 INIT_LIST_HEAD(&pRxTS->rx_pending_pkt_list);
 170
 171                 timer_setup(&pRxTS->ts_common_info.SetupTimer, TsSetupTimeOut,
 172                             0);
 173
 174                 timer_setup(&pRxTS->ts_common_info.InactTimer, TsInactTimeout,
 175                             0);
 176
 177                 timer_setup(&pRxTS->rx_admitted_ba_record.timer,
 178                             RxBaInactTimeout, 0);
 179
 180                 timer_setup(&pRxTS->rx_pkt_pending_timer, RxPktPendingTimeout, 0);
 181
 182                 ResetRxTsEntry(pRxTS);
 183                 list_add_tail(&pRxTS->ts_common_info.List,
 184                               &ieee->Rx_TS_Unused_List);
 185                 pRxTS++;
 186         }
 187         INIT_LIST_HEAD(&ieee->RxReorder_Unused_List);
 188         for (count = 0; count < REORDER_ENTRY_NUM; count++) {
 189                 list_add_tail(&pRxReorderEntry->List,
 190                               &ieee->RxReorder_Unused_List);
 191                 if (count == (REORDER_ENTRY_NUM - 1))
 192                         break;
 193                 pRxReorderEntry = &ieee->RxReorderEntry[count + 1];
 194         }
 195 }
 196
 197 static void AdmitTS(struct rtllib_device *ieee,
 198                     struct ts_common_info *pTsCommonInfo, u32 InactTime)
 199 {
 200         del_timer_sync(&pTsCommonInfo->SetupTimer);
 201         del_timer_sync(&pTsCommonInfo->InactTimer);
 202
 203         if (InactTime != 0)
 204                 mod_timer(&pTsCommonInfo->InactTimer, jiffies +
 205                           msecs_to_jiffies(InactTime));
 206 }
 207
 208 static struct ts_common_info *SearchAdmitTRStream(struct rtllib_device *ieee,
 209                                                   u8 *Addr, u8 TID,
 210                                                   enum tr_select TxRxSelect)
 211 {
 212         u8      dir;
 213         bool    search_dir[4] = {0};
 214         struct list_head *psearch_list;
 215         struct ts_common_info *pRet = NULL;
 216
 217         if (ieee->iw_mode == IW_MODE_MASTER) {
 218                 if (TxRxSelect == TX_DIR) {
 219                         search_dir[DIR_DOWN] = true;
 220                         search_dir[DIR_BI_DIR] = true;
 221                 } else {
 222                         search_dir[DIR_UP] = true;
 223                         search_dir[DIR_BI_DIR] = true;
 224                 }
 225         } else if (ieee->iw_mode == IW_MODE_ADHOC) {
 226                 if (TxRxSelect == TX_DIR)
 227                         search_dir[DIR_UP] = true;
 228                 else
 229                         search_dir[DIR_DOWN] = true;
 230         } else {
 231                 if (TxRxSelect == TX_DIR) {
 232                         search_dir[DIR_UP] = true;
 233                         search_dir[DIR_BI_DIR] = true;
 234                         search_dir[DIR_DIRECT] = true;
 235                 } else {
 236                         search_dir[DIR_DOWN] = true;
 237                         search_dir[DIR_BI_DIR] = true;
 238                         search_dir[DIR_DIRECT] = true;
 239                 }
 240         }
 241
 242         if (TxRxSelect == TX_DIR)
 243                 psearch_list = &ieee->Tx_TS_Admit_List;
 244         else
 245                 psearch_list = &ieee->Rx_TS_Admit_List;
 246
 247         for (dir = 0; dir <= DIR_BI_DIR; dir++) {
 248                 if (!search_dir[dir])
 249                         continue;
 250                 list_for_each_entry(pRet, psearch_list, List) {
 251                         if (memcmp(pRet->Addr, Addr, 6) == 0 &&
 252                             pRet->TSpec.f.TSInfo.field.ucTSID == TID &&
 253                             pRet->TSpec.f.TSInfo.field.ucDirection == dir)
 254                                 break;
 255                 }
 256                 if (&pRet->List  != psearch_list)
 257                         break;
 258         }
 259
 260         if (pRet && &pRet->List  != psearch_list)
 261                 return pRet;
 262         return NULL;
 263 }
 264
 265 static void MakeTSEntry(struct ts_common_info *pTsCommonInfo, u8 *Addr,
 266                         union tspec_body *pTSPEC, union qos_tclas *pTCLAS,
 267                         u8 TCLAS_Num, u8 TCLAS_Proc)
 268 {
 269         u8      count;
 270
 271         if (!pTsCommonInfo)
 272                 return;
 273
 274         memcpy(pTsCommonInfo->Addr, Addr, 6);
 275
 276         if (pTSPEC)
 277                 memcpy((u8 *)(&(pTsCommonInfo->TSpec)), (u8 *)pTSPEC,
 278                         sizeof(union tspec_body));
 279
 280         for (count = 0; count < TCLAS_Num; count++)
 281                 memcpy((u8 *)(&(pTsCommonInfo->TClass[count])),
 282                        (u8 *)pTCLAS, sizeof(union qos_tclas));
 283
 284         pTsCommonInfo->TClasProc = TCLAS_Proc;
 285         pTsCommonInfo->TClasNum = TCLAS_Num;
 286 }
 287
 288 bool GetTs(struct rtllib_device *ieee, struct ts_common_info **ppTS,
 289            u8 *Addr, u8 TID, enum tr_select TxRxSelect, bool bAddNewTs)
 290 {
 291         u8      UP = 0;
 292         union tspec_body TSpec;
 293         union qos_tsinfo *pTSInfo = &TSpec.f.TSInfo;
 294         struct list_head *pUnusedList;
 295         struct list_head *pAddmitList;
 296         enum direction_value Dir;
 297
 298         if (is_multicast_ether_addr(Addr)) {
 299                 netdev_warn(ieee->dev, "Get TS for Broadcast or Multicast\n");
 300                 return false;
 301         }
 302         if (ieee->current_network.qos_data.supported == 0) {
 303                 UP = 0;
 304         } else {
 305                 switch (TID) {
 306                 case 0:
 307                 case 3:
 308                         UP = 0;
 309                         break;
 310                 case 1:
 311                 case 2:
 312                         UP = 2;
 313                         break;
 314                 case 4:
 315                 case 5:
 316                         UP = 5;
 317                         break;
 318                 case 6:
 319                 case 7:
 320                         UP = 7;
 321                         break;
 322                 default:
 323                         netdev_warn(ieee->dev, "%s(): TID(%d) is not valid\n",
 324                                     __func__, TID);
 325                         return false;
 326                 }
 327         }
 328
 329         *ppTS = SearchAdmitTRStream(ieee, Addr, UP, TxRxSelect);
 330         if (*ppTS)
 331                 return true;
 332
 333         if (!bAddNewTs) {
 334                 netdev_dbg(ieee->dev, "add new TS failed(tid:%d)\n", UP);
 335                 return false;
 336         }
 337
 338         pUnusedList = (TxRxSelect == TX_DIR) ?
 339                                 (&ieee->Tx_TS_Unused_List) :
 340                                 (&ieee->Rx_TS_Unused_List);
 341
 342         pAddmitList = (TxRxSelect == TX_DIR) ?
 343                                 (&ieee->Tx_TS_Admit_List) :
 344                                 (&ieee->Rx_TS_Admit_List);
 345
 346         Dir = (ieee->iw_mode == IW_MODE_MASTER) ?
 347                                 ((TxRxSelect == TX_DIR) ? DIR_DOWN : DIR_UP) :
 348                                 ((TxRxSelect == TX_DIR) ? DIR_UP : DIR_DOWN);
 349
 350         if (!list_empty(pUnusedList)) {
 351                 (*ppTS) = list_entry(pUnusedList->next,
 352                           struct ts_common_info, List);
 353                 list_del_init(&(*ppTS)->List);
 354                 if (TxRxSelect == TX_DIR) {
 355                         struct tx_ts_record *tmp =
 356                                 container_of(*ppTS,
 357                                 struct tx_ts_record,
 358                                 TsCommonInfo);
 359                         ResetTxTsEntry(tmp);
 360                 } else {
 361                         struct rx_ts_record *tmp =
 362                                  container_of(*ppTS,
 363                                  struct rx_ts_record,
 364                                  ts_common_info);
 365                         ResetRxTsEntry(tmp);
 366                 }
 367
 368                 netdev_dbg(ieee->dev,
 369                            "to init current TS, UP:%d, Dir:%d, addr: %pM ppTs=%p\n",
 370                            UP, Dir, Addr, *ppTS);
 371                 pTSInfo->field.ucTrafficType = 0;
 372                 pTSInfo->field.ucTSID = UP;
 373                 pTSInfo->field.ucDirection = Dir;
 374                 pTSInfo->field.ucAccessPolicy = 1;
 375                 pTSInfo->field.ucAggregation = 0;
 376                 pTSInfo->field.ucPSB = 0;
 377                 pTSInfo->field.ucUP = UP;
 378                 pTSInfo->field.ucTSInfoAckPolicy = 0;
 379                 pTSInfo->field.ucSchedule = 0;
 380
 381                 MakeTSEntry(*ppTS, Addr, &TSpec, NULL, 0, 0);
 382                 AdmitTS(ieee, *ppTS, 0);
 383                 list_add_tail(&((*ppTS)->List), pAddmitList);
 384
 385                 return true;
 386         }
 387
 388         netdev_warn(ieee->dev,
 389                     "There is not enough dir=%d(0=up down=1) TS record to be used!",
 390                     Dir);
 391         return false;
 392 }
 393
 394 static void RemoveTsEntry(struct rtllib_device *ieee,
 395                           struct ts_common_info *pTs, enum tr_select TxRxSelect)
 396 {
 397         del_timer_sync(&pTs->SetupTimer);
 398         del_timer_sync(&pTs->InactTimer);
 399         TsInitDelBA(ieee, pTs, TxRxSelect);
 400
 401         if (TxRxSelect == RX_DIR) {
 402                 struct rx_reorder_entry *pRxReorderEntry;
 403                 struct rx_ts_record *pRxTS = (struct rx_ts_record *)pTs;
 404
 405                 if (timer_pending(&pRxTS->rx_pkt_pending_timer))
 406                         del_timer_sync(&pRxTS->rx_pkt_pending_timer);
 407
 408                 while (!list_empty(&pRxTS->rx_pending_pkt_list)) {
 409                         pRxReorderEntry = (struct rx_reorder_entry *)
 410                                         list_entry(pRxTS->rx_pending_pkt_list.prev,
 411                                         struct rx_reorder_entry, List);
 412                         netdev_dbg(ieee->dev,  "%s(): Delete SeqNum %d!\n",
 413                                    __func__, pRxReorderEntry->SeqNum);
 414                         list_del_init(&pRxReorderEntry->List);
 415                         {
 416                                 int i = 0;
 417                                 struct rtllib_rxb *prxb = pRxReorderEntry->prxb;
 418
 419                                 if (unlikely(!prxb))
 420                                         return;
 421                                 for (i = 0; i < prxb->nr_subframes; i++)
 422                                         dev_kfree_skb(prxb->subframes[i]);
 423                                 kfree(prxb);
 424                                 prxb = NULL;
 425                         }
 426                         list_add_tail(&pRxReorderEntry->List,
 427                                       &ieee->RxReorder_Unused_List);
 428                 }
 429         } else {
 430                 struct tx_ts_record *pTxTS = (struct tx_ts_record *)pTs;
 431
 432                 del_timer_sync(&pTxTS->TsAddBaTimer);
 433         }
 434 }
 435
 436 void RemovePeerTS(struct rtllib_device *ieee, u8 *Addr)
 437 {
 438         struct ts_common_info *pTS, *pTmpTS;
 439
 440         netdev_info(ieee->dev, "===========>%s, %pM\n", __func__, Addr);
 441
 442         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Pending_List, List) {
 443                 if (memcmp(pTS->Addr, Addr, 6) == 0) {
 444                         RemoveTsEntry(ieee, pTS, TX_DIR);
 445                         list_del_init(&pTS->List);
 446                         list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
 447                 }
 448         }
 449
 450         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Admit_List, List) {
 451                 if (memcmp(pTS->Addr, Addr, 6) == 0) {
 452                         netdev_info(ieee->dev,
 453                                     "====>remove Tx_TS_admin_list\n");
 454                         RemoveTsEntry(ieee, pTS, TX_DIR);
 455                         list_del_init(&pTS->List);
 456                         list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
 457                 }
 458         }
 459
 460         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Pending_List, List) {
 461                 if (memcmp(pTS->Addr, Addr, 6) == 0) {
 462                         RemoveTsEntry(ieee, pTS, RX_DIR);
 463                         list_del_init(&pTS->List);
 464                         list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
 465                 }
 466         }
 467
 468         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Admit_List, List) {
 469                 if (memcmp(pTS->Addr, Addr, 6) == 0) {
 470                         RemoveTsEntry(ieee, pTS, RX_DIR);
 471                         list_del_init(&pTS->List);
 472                         list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
 473                 }
 474         }
 475 }
 476 EXPORT_SYMBOL(RemovePeerTS);
 477
 478 void RemoveAllTS(struct rtllib_device *ieee)
 479 {
 480         struct ts_common_info *pTS, *pTmpTS;
 481
 482         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Pending_List, List) {
 483                 RemoveTsEntry(ieee, pTS, TX_DIR);
 484                 list_del_init(&pTS->List);
 485                 list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
 486         }
 487
 488         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Admit_List, List) {
 489                 RemoveTsEntry(ieee, pTS, TX_DIR);
 490                 list_del_init(&pTS->List);
 491                 list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
 492         }
 493
 494         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Pending_List, List) {
 495                 RemoveTsEntry(ieee, pTS, RX_DIR);
 496                 list_del_init(&pTS->List);
 497                 list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
 498         }
 499
 500         list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Admit_List, List) {
 501                 RemoveTsEntry(ieee, pTS, RX_DIR);
 502                 list_del_init(&pTS->List);
 503                 list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
 504         }
 505 }
 506
 507 void TsStartAddBaProcess(struct rtllib_device *ieee, struct tx_ts_record *pTxTS)
 508 {
 509         if (pTxTS->bAddBaReqInProgress == false) {
 510                 pTxTS->bAddBaReqInProgress = true;
 511
 512                 if (pTxTS->bAddBaReqDelayed) {
 513                         netdev_dbg(ieee->dev, "Start ADDBA after 60 sec!!\n");
 514                         mod_timer(&pTxTS->TsAddBaTimer, jiffies +
 515                                   msecs_to_jiffies(TS_ADDBA_DELAY));
 516                 } else {
 517                         netdev_dbg(ieee->dev, "Immediately Start ADDBA\n");
 518                         mod_timer(&pTxTS->TsAddBaTimer, jiffies + 10);
 519                 }
 520         } else
 521                 netdev_dbg(ieee->dev, "BA timer is already added\n");
 522 }