drivers/staging/rtl8723bs/hal/rtl8723bs_recv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   5  *
   6  ******************************************************************************/
   7 #define _RTL8723BS_RECV_C_
   8
   9 #include <drv_types.h>
  10 #include <rtw_debug.h>
  11 #include <rtl8723b_hal.h>
  12
  13 static void initrecvbuf(struct recv_buf *precvbuf, struct adapter *padapter)
  14 {
  15         INIT_LIST_HEAD(&precvbuf->list);
  16         spin_lock_init(&precvbuf->recvbuf_lock);
  17
  18         precvbuf->adapter = padapter;
  19 }
  20
  21 static void update_recvframe_attrib(struct adapter *padapter,
  22                                     union recv_frame *precvframe,
  23                                     struct recv_stat *prxstat)
  24 {
  25         struct rx_pkt_attrib *pattrib;
  26         struct recv_stat report;
  27         PRXREPORT prxreport = (PRXREPORT)&report;
  28
  29         report.rxdw0 = prxstat->rxdw0;
  30         report.rxdw1 = prxstat->rxdw1;
  31         report.rxdw2 = prxstat->rxdw2;
  32         report.rxdw3 = prxstat->rxdw3;
  33         report.rxdw4 = prxstat->rxdw4;
  34         report.rxdw5 = prxstat->rxdw5;
  35
  36         pattrib = &precvframe->u.hdr.attrib;
  37         memset(pattrib, 0, sizeof(struct rx_pkt_attrib));
  38
  39         /*  update rx report to recv_frame attribute */
  40         pattrib->pkt_rpt_type = prxreport->c2h_ind ? C2H_PACKET : NORMAL_RX;
  41 /*      DBG_871X("%s: pkt_rpt_type =%d\n", __func__, pattrib->pkt_rpt_type); */
  42
  43         if (pattrib->pkt_rpt_type == NORMAL_RX) {
  44                 /*  Normal rx packet */
  45                 /*  update rx report to recv_frame attribute */
  46                 pattrib->pkt_len = (u16)prxreport->pktlen;
  47                 pattrib->drvinfo_sz = (u8)(prxreport->drvinfosize << 3);
  48                 pattrib->physt = (u8)prxreport->physt;
  49
  50                 pattrib->crc_err = (u8)prxreport->crc32;
  51                 pattrib->icv_err = (u8)prxreport->icverr;
  52
  53                 pattrib->bdecrypted = (u8)(prxreport->swdec ? 0 : 1);
  54                 pattrib->encrypt = (u8)prxreport->security;
  55
  56                 pattrib->qos = (u8)prxreport->qos;
  57                 pattrib->priority = (u8)prxreport->tid;
  58
  59                 pattrib->amsdu = (u8)prxreport->amsdu;
  60
  61                 pattrib->seq_num = (u16)prxreport->seq;
  62                 pattrib->frag_num = (u8)prxreport->frag;
  63                 pattrib->mfrag = (u8)prxreport->mf;
  64                 pattrib->mdata = (u8)prxreport->md;
  65
  66                 pattrib->data_rate = (u8)prxreport->rx_rate;
  67         } else {
  68                 pattrib->pkt_len = (u16)prxreport->pktlen;
  69         }
  70 }
  71
  72 /*
  73  * Notice:
  74  *Before calling this function,
  75  *precvframe->u.hdr.rx_data should be ready!
  76  */
  77 static void update_recvframe_phyinfo(union recv_frame *precvframe,
  78                                      struct phy_stat *pphy_status)
  79 {
  80         struct adapter *padapter = precvframe->u.hdr.adapter;
  81         struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib;
  82         struct hal_com_data *p_hal_data = GET_HAL_DATA(padapter);
  83         struct odm_phy_info *p_phy_info =
  84                 (struct odm_phy_info *)(&pattrib->phy_info);
  85
  86         u8 *wlanhdr;
  87         u8 *my_bssid;
  88         u8 *rx_bssid;
  89         u8 *rx_ra;
  90         u8 *my_hwaddr;
  91         u8 *sa = NULL;
  92
  93         struct odm_packet_info pkt_info = {
  94                 .data_rate   = 0x00,
  95                 .station_id  = 0x00,
  96                 .bssid_match = false,
  97                 .to_self     = false,
  98                 .is_beacon   = false,
  99         };
 100
 101         /* _irqL                irqL; */
 102         struct sta_priv *pstapriv;
 103         struct sta_info *psta;
 104
 105         wlanhdr = get_recvframe_data(precvframe);
 106         my_bssid = get_bssid(&padapter->mlmepriv);
 107         rx_bssid = get_hdr_bssid(wlanhdr);
 108         pkt_info.bssid_match = ((!IsFrameTypeCtrl(wlanhdr)) &&
 109                                 !pattrib->icv_err && !pattrib->crc_err &&
 110                                 ether_addr_equal(rx_bssid, my_bssid));
 111
 112         rx_ra = get_ra(wlanhdr);
 113         my_hwaddr = myid(&padapter->eeprompriv);
 114         pkt_info.to_self = pkt_info.bssid_match &&
 115                 ether_addr_equal(rx_ra, my_hwaddr);
 116
 117
 118         pkt_info.is_beacon = pkt_info.bssid_match &&
 119                 (GetFrameSubType(wlanhdr) == WIFI_BEACON);
 120
 121         sa = get_ta(wlanhdr);
 122
 123         pkt_info.station_id = 0xFF;
 124
 125         pstapriv = &padapter->stapriv;
 126         psta = rtw_get_stainfo(pstapriv, sa);
 127         if (psta) {
 128                 pkt_info.station_id = psta->mac_id;
 129                 /* DBG_8192C("%s ==> StationID(%d)\n",
 130                  *        __func__, pkt_info.station_id); */
 131         }
 132         pkt_info.data_rate = pattrib->data_rate;
 133
 134         /* rtl8723b_query_rx_phy_status(precvframe, pphy_status); */
 135         /* spin_lock_bh(&p_hal_data->odm_stainfo_lock); */
 136         ODM_PhyStatusQuery(&p_hal_data->odmpriv, p_phy_info,
 137                            (u8 *)pphy_status, &(pkt_info));
 138         if (psta)
 139                 psta->rssi = pattrib->phy_info.RecvSignalPower;
 140         /* spin_unlock_bh(&p_hal_data->odm_stainfo_lock); */
 141         precvframe->u.hdr.psta = NULL;
 142         if (
 143                 pkt_info.bssid_match &&
 144                 (check_fwstate(&padapter->mlmepriv, WIFI_AP_STATE) == true)
 145         ) {
 146                 if (psta) {
 147                         precvframe->u.hdr.psta = psta;
 148                         rtl8723b_process_phy_info(padapter, precvframe);
 149                 }
 150         } else if (pkt_info.to_self || pkt_info.is_beacon) {
 151                 u32 adhoc_state = WIFI_ADHOC_STATE | WIFI_ADHOC_MASTER_STATE;
 152                 if (check_fwstate(&padapter->mlmepriv, adhoc_state))
 153                         if (psta)
 154                                 precvframe->u.hdr.psta = psta;
 155                 rtl8723b_process_phy_info(padapter, precvframe);
 156         }
 157 }
 158
 159 static void rtl8723bs_c2h_packet_handler(struct adapter *padapter,
 160                                          u8 *pbuf, u16 length)
 161 {
 162         u8 *tmp = NULL;
 163         u8 res = false;
 164
 165         if (length == 0)
 166                 return;
 167
 168         /* DBG_871X("+%s() length =%d\n", __func__, length); */
 169
 170         tmp = rtw_zmalloc(length);
 171         if (!tmp)
 172                 return;
 173
 174         memcpy(tmp, pbuf, length);
 175
 176         res = rtw_c2h_packet_wk_cmd(padapter, tmp, length);
 177
 178         if (!res)
 179                 kfree(tmp);
 180
 181         /* DBG_871X("-%s res(%d)\n", __func__, res); */
 182 }
 183
 184 static inline union recv_frame *try_alloc_recvframe(struct recv_priv *precvpriv,
 185                                                     struct recv_buf *precvbuf)
 186 {
 187         union recv_frame *precvframe;
 188
 189         precvframe = rtw_alloc_recvframe(&precvpriv->free_recv_queue);
 190         if (!precvframe) {
 191                 DBG_8192C("%s: no enough recv frame!\n", __func__);
 192                 rtw_enqueue_recvbuf_to_head(precvbuf,
 193                                             &precvpriv->recv_buf_pending_queue);
 194
 195                 /*  The case of can't allocate recvframe should be temporary, */
 196                 /*  schedule again and hope recvframe is available next time. */
 197                 tasklet_schedule(&precvpriv->recv_tasklet);
 198         }
 199
 200         return precvframe;
 201 }
 202
 203 static inline bool rx_crc_err(struct recv_priv *precvpriv,
 204                               struct hal_com_data *p_hal_data,
 205                               struct rx_pkt_attrib *pattrib,
 206                               union recv_frame *precvframe)
 207 {
 208         /*  fix Hardware RX data error, drop whole recv_buffer */
 209         if ((!(p_hal_data->ReceiveConfig & RCR_ACRC32)) && pattrib->crc_err) {
 210                 DBG_8192C("%s()-%d: RX Warning! rx CRC ERROR !!\n",
 211                           __func__, __LINE__);
 212                 rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
 213                 return true;
 214         }
 215
 216         return false;
 217 }
 218
 219 static inline bool pkt_exceeds_tail(struct recv_priv *precvpriv,
 220                                     u8 *end, u8 *tail,
 221                                     union recv_frame *precvframe)
 222 {
 223         if (end > tail) {
 224                 DBG_8192C("%s()-%d: : next pkt len(%p,%d) exceed ptail(%p)!\n",
 225                           __func__, __LINE__, ptr, pkt_offset, precvbuf->ptail);
 226                 rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
 227                 return true;
 228         }
 229
 230         return false;
 231 }
 232
 233 static void rtl8723bs_recv_tasklet(struct tasklet_struct *t)
 234 {
 235         struct adapter *padapter = from_tasklet(padapter, t,
 236                                                 recvpriv.recv_tasklet);
 237         struct hal_com_data *p_hal_data;
 238         struct recv_priv *precvpriv;
 239         struct recv_buf *precvbuf;
 240         union recv_frame *precvframe;
 241         struct rx_pkt_attrib *pattrib;
 242         struct __queue *recv_buf_queue;
 243         u8 *ptr;
 244         u32 pkt_offset, skb_len, alloc_sz;
 245         _pkt *pkt_copy = NULL;
 246         u8 shift_sz = 0, rx_report_sz = 0;
 247
 248         p_hal_data = GET_HAL_DATA(padapter);
 249         precvpriv = &padapter->recvpriv;
 250         recv_buf_queue = &precvpriv->recv_buf_pending_queue;
 251
 252         do {
 253                 precvbuf = rtw_dequeue_recvbuf(recv_buf_queue);
 254                 if (!precvbuf)
 255                         break;
 256
 257                 ptr = precvbuf->pdata;
 258
 259                 while (ptr < precvbuf->ptail) {
 260                         precvframe = try_alloc_recvframe(precvpriv, precvbuf);
 261                         if (!precvframe)
 262                                 return;
 263
 264                         /* rx desc parsing */
 265                         update_recvframe_attrib(padapter, precvframe,
 266                                                 (struct recv_stat *)ptr);
 267
 268                         pattrib = &precvframe->u.hdr.attrib;
 269
 270                         if (rx_crc_err(precvpriv, p_hal_data,
 271                                        pattrib, precvframe))
 272                                 break;
 273
 274                         rx_report_sz = RXDESC_SIZE + pattrib->drvinfo_sz;
 275                         pkt_offset = rx_report_sz +
 276                                 pattrib->shift_sz +
 277                                 pattrib->pkt_len;
 278
 279                         if (pkt_exceeds_tail(precvpriv, ptr + pkt_offset,
 280                                              precvbuf->ptail, precvframe))
 281                                 break;
 282
 283                         if ((pattrib->crc_err) || (pattrib->icv_err)) {
 284                                 DBG_8192C("%s: crc_err =%d icv_err =%d, skip!\n",
 285                                           __func__, pattrib->crc_err,
 286                                           pattrib->icv_err);
 287                                 rtw_free_recvframe(precvframe,
 288                                                    &precvpriv->free_recv_queue);
 289                         } else {
 290                                 /*      Modified by Albert 20101213 */
 291                                 /*      For 8 bytes IP header alignment. */
 292                                 if (pattrib->qos)       /*      Qos data, wireless lan header length is 26 */
 293                                         shift_sz = 6;
 294                                 else
 295                                         shift_sz = 0;
 296
 297                                 skb_len = pattrib->pkt_len;
 298
 299                                 /*  for first fragment packet, driver need allocate 1536+drvinfo_sz+RXDESC_SIZE to defrag packet. */
 300                                 /*  modify alloc_sz for recvive crc error packet by thomas 2011-06-02 */
 301                                 if ((pattrib->mfrag == 1) && (pattrib->frag_num == 0)) {
 302                                         if (skb_len <= 1650)
 303                                                 alloc_sz = 1664;
 304                                         else
 305                                                 alloc_sz = skb_len + 14;
 306                                 } else {
 307                                         alloc_sz = skb_len;
 308                                         /*      6 is for IP header 8 bytes alignment in QoS packet case. */
 309                                         /*      8 is for skb->data 4 bytes alignment. */
 310                                         alloc_sz += 14;
 311                                 }
 312
 313                                 pkt_copy = rtw_skb_alloc(alloc_sz);
 314                                 if (!pkt_copy) {
 315                                         DBG_8192C("%s: alloc_skb fail, drop frame\n", __func__);
 316                                         rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
 317                                         break;
 318                                 }
 319
 320                                 pkt_copy->dev = padapter->pnetdev;
 321                                 precvframe->u.hdr.pkt = pkt_copy;
 322                                 skb_reserve(pkt_copy, 8 - ((SIZE_PTR)(pkt_copy->data) & 7));/* force pkt_copy->data at 8-byte alignment address */
 323                                 skb_reserve(pkt_copy, shift_sz);/* force ip_hdr at 8-byte alignment address according to shift_sz. */
 324                                 memcpy(pkt_copy->data, (ptr + rx_report_sz + pattrib->shift_sz), skb_len);
 325                                 precvframe->u.hdr.rx_head = pkt_copy->head;
 326                                 precvframe->u.hdr.rx_data = precvframe->u.hdr.rx_tail = pkt_copy->data;
 327                                 precvframe->u.hdr.rx_end = skb_end_pointer(pkt_copy);
 328
 329                                 recvframe_put(precvframe, skb_len);
 330                                 /* recvframe_pull(precvframe, drvinfo_sz + RXDESC_SIZE); */
 331
 332                                 if (p_hal_data->ReceiveConfig & RCR_APPFCS)
 333                                         recvframe_pull_tail(precvframe, IEEE80211_FCS_LEN);
 334
 335                                 /*  move to drv info position */
 336                                 ptr += RXDESC_SIZE;
 337
 338                                 /*  update drv info */
 339                                 if (p_hal_data->ReceiveConfig & RCR_APP_BA_SSN) {
 340                                         /* rtl8723s_update_bassn(padapter, pdrvinfo); */
 341                                         ptr += 4;
 342                                 }
 343
 344                                 if (pattrib->pkt_rpt_type == NORMAL_RX) { /* Normal rx packet */
 345                                         if (pattrib->physt)
 346                                                 update_recvframe_phyinfo(precvframe, (struct phy_stat *)ptr);
 347
 348                                         if (rtw_recv_entry(precvframe) != _SUCCESS) {
 349                                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_dump_, ("%s: rtw_recv_entry(precvframe) != _SUCCESS\n", __func__));
 350                                         }
 351                                 } else if (pattrib->pkt_rpt_type == C2H_PACKET) {
 352                                         C2H_EVT_HDR     C2hEvent;
 353
 354                                         u16 len_c2h = pattrib->pkt_len;
 355                                         u8 *pbuf_c2h = precvframe->u.hdr.rx_data;
 356                                         u8 *pdata_c2h;
 357
 358                                         C2hEvent.CmdID = pbuf_c2h[0];
 359                                         C2hEvent.CmdSeq = pbuf_c2h[1];
 360                                         C2hEvent.CmdLen = (len_c2h-2);
 361                                         pdata_c2h = pbuf_c2h+2;
 362
 363                                         if (C2hEvent.CmdID == C2H_CCX_TX_RPT)
 364                                                 CCX_FwC2HTxRpt_8723b(padapter, pdata_c2h, C2hEvent.CmdLen);
 365                                         else
 366                                                 rtl8723bs_c2h_packet_handler(padapter, precvframe->u.hdr.rx_data, pattrib->pkt_len);
 367
 368                                         rtw_free_recvframe(precvframe, &precvpriv->free_recv_queue);
 369                                 }
 370                         }
 371
 372                         pkt_offset = round_up(pkt_offset, 8);
 373                         precvbuf->pdata += pkt_offset;
 374                         ptr = precvbuf->pdata;
 375                         precvframe = NULL;
 376                         pkt_copy = NULL;
 377                 }
 378
 379                 rtw_enqueue_recvbuf(precvbuf, &precvpriv->free_recv_buf_queue);
 380         } while (1);
 381 }
 382
 383 /*
 384  * Initialize recv private variable for hardware dependent
 385  * 1. recv buf
 386  * 2. recv tasklet
 387  *
 388  */
 389 s32 rtl8723bs_init_recv_priv(struct adapter *padapter)
 390 {
 391         s32 res;
 392         u32 i, n;
 393         struct recv_priv *precvpriv;
 394         struct recv_buf *precvbuf;
 395
 396         res = _SUCCESS;
 397         precvpriv = &padapter->recvpriv;
 398
 399         /* 3 1. init recv buffer */
 400         _rtw_init_queue(&precvpriv->free_recv_buf_queue);
 401         _rtw_init_queue(&precvpriv->recv_buf_pending_queue);
 402
 403         n = NR_RECVBUFF * sizeof(struct recv_buf) + 4;
 404         precvpriv->pallocated_recv_buf = rtw_zmalloc(n);
 405         if (!precvpriv->pallocated_recv_buf) {
 406                 res = _FAIL;
 407                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("alloc recv_buf fail!\n"));
 408                 goto exit;
 409         }
 410
 411         precvpriv->precv_buf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(precvpriv->pallocated_recv_buf), 4);
 412
 413         /*  init each recv buffer */
 414         precvbuf = (struct recv_buf *)precvpriv->precv_buf;
 415         for (i = 0; i < NR_RECVBUFF; i++) {
 416                 initrecvbuf(precvbuf, padapter);
 417
 418                 if (!precvbuf->pskb) {
 419                         SIZE_PTR tmpaddr = 0;
 420                         SIZE_PTR alignment = 0;
 421
 422                         precvbuf->pskb = rtw_skb_alloc(MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
 423
 424                         if (precvbuf->pskb) {
 425                                 precvbuf->pskb->dev = padapter->pnetdev;
 426
 427                                 tmpaddr = (SIZE_PTR)precvbuf->pskb->data;
 428                                 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
 429                                 skb_reserve(precvbuf->pskb, (RECVBUFF_ALIGN_SZ - alignment));
 430                         }
 431
 432                         if (!precvbuf->pskb) {
 433                                 DBG_871X("%s: alloc_skb fail!\n", __func__);
 434                         }
 435                 }
 436
 437                 list_add_tail(&precvbuf->list, &precvpriv->free_recv_buf_queue.queue);
 438
 439                 precvbuf++;
 440         }
 441         precvpriv->free_recv_buf_queue_cnt = i;
 442
 443         if (res == _FAIL)
 444                 goto initbuferror;
 445
 446         /* 3 2. init tasklet */
 447         tasklet_setup(&precvpriv->recv_tasklet, rtl8723bs_recv_tasklet);
 448
 449         goto exit;
 450
 451 initbuferror:
 452         precvbuf = (struct recv_buf *)precvpriv->precv_buf;
 453         if (precvbuf) {
 454                 n = precvpriv->free_recv_buf_queue_cnt;
 455                 precvpriv->free_recv_buf_queue_cnt = 0;
 456                 for (i = 0; i < n ; i++) {
 457                         list_del_init(&precvbuf->list);
 458                         rtw_os_recvbuf_resource_free(padapter, precvbuf);
 459                         precvbuf++;
 460                 }
 461                 precvpriv->precv_buf = NULL;
 462         }
 463
 464         kfree(precvpriv->pallocated_recv_buf);
 465         precvpriv->pallocated_recv_buf = NULL;
 466
 467 exit:
 468         return res;
 469 }
 470
 471 /*
 472  * Free recv private variable of hardware dependent
 473  * 1. recv buf
 474  * 2. recv tasklet
 475  *
 476  */
 477 void rtl8723bs_free_recv_priv(struct adapter *padapter)
 478 {
 479         u32 i;
 480         struct recv_priv *precvpriv;
 481         struct recv_buf *precvbuf;
 482
 483         precvpriv = &padapter->recvpriv;
 484
 485         /* 3 1. kill tasklet */
 486         tasklet_kill(&precvpriv->recv_tasklet);
 487
 488         /* 3 2. free all recv buffers */
 489         precvbuf = (struct recv_buf *)precvpriv->precv_buf;
 490         if (precvbuf) {
 491                 precvpriv->free_recv_buf_queue_cnt = 0;
 492                 for (i = 0; i < NR_RECVBUFF; i++) {
 493                         list_del_init(&precvbuf->list);
 494                         rtw_os_recvbuf_resource_free(padapter, precvbuf);
 495                         precvbuf++;
 496                 }
 497                 precvpriv->precv_buf = NULL;
 498         }
 499
 500         kfree(precvpriv->pallocated_recv_buf);
 501         precvpriv->pallocated_recv_buf = NULL;
 502 }