Root/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
23static void TsSetupTimeOut(unsigned long data)
24{
25}
26
27static void TsInactTimeout(unsigned long data)
28{
29}
30
31static 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
99static 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
111static 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
120static 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
132static 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
140void 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
217static 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
228static 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
286static 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
309bool 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_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
421static 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
462void 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}
500EXPORT_SYMBOL(RemovePeerTS);
501
502void RemoveAllTS(struct rtllib_device *ieee)
503{
504    struct ts_common_info *pTS, *pTmpTS;
505
506    list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Pending_List, List) {
507        RemoveTsEntry(ieee, pTS, TX_DIR);
508        list_del_init(&pTS->List);
509        list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
510    }
511
512    list_for_each_entry_safe(pTS, pTmpTS, &ieee->Tx_TS_Admit_List, List) {
513        RemoveTsEntry(ieee, pTS, TX_DIR);
514        list_del_init(&pTS->List);
515        list_add_tail(&pTS->List, &ieee->Tx_TS_Unused_List);
516    }
517
518    list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Pending_List, List) {
519        RemoveTsEntry(ieee, pTS, RX_DIR);
520        list_del_init(&pTS->List);
521        list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
522    }
523
524    list_for_each_entry_safe(pTS, pTmpTS, &ieee->Rx_TS_Admit_List, List) {
525        RemoveTsEntry(ieee, pTS, RX_DIR);
526        list_del_init(&pTS->List);
527        list_add_tail(&pTS->List, &ieee->Rx_TS_Unused_List);
528    }
529}
530
531void TsStartAddBaProcess(struct rtllib_device *ieee, struct tx_ts_record *pTxTS)
532{
533    if (pTxTS->bAddBaReqInProgress == false) {
534        pTxTS->bAddBaReqInProgress = true;
535
536        if (pTxTS->bAddBaReqDelayed) {
537            RTLLIB_DEBUG(RTLLIB_DL_BA, "TsStartAddBaProcess(): "
538                     "Delayed Start ADDBA after 60 sec!!\n");
539            mod_timer(&pTxTS->TsAddBaTimer, jiffies +
540                  MSECS(TS_ADDBA_DELAY));
541        } else {
542            RTLLIB_DEBUG(RTLLIB_DL_BA, "TsStartAddBaProcess(): "
543                     "Immediately Start ADDBA now!!\n");
544            mod_timer(&pTxTS->TsAddBaTimer, jiffies+10);
545        }
546    } else
547        RTLLIB_DEBUG(RTLLIB_DL_BA, "%s()==>BA timer is already added\n",
548                 __func__);
549}
550

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