drivers/net/wireless/mwifiex/11n_rxreorder.c

   1 /*
   2  * Marvell Wireless LAN device driver: 802.11n RX Re-ordering
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27 #include "11n_rxreorder.h"
  28
  29 /*
  30  * This function dispatches all packets in the Rx reorder table until the
  31  * start window.
  32  *
  33  * There could be holes in the buffer, which are skipped by the function.
  34  * Since the buffer is linear, the function uses rotation to simulate
  35  * circular buffer.
  36  */
  37 static void
  38 mwifiex_11n_dispatch_pkt(struct mwifiex_private *priv,
  39                          struct mwifiex_rx_reorder_tbl *tbl, int start_win)
  40 {
  41         int pkt_to_send, i;
  42         void *rx_tmp_ptr;
  43         unsigned long flags;
  44
  45         pkt_to_send = (start_win > tbl->start_win) ?
  46                       min((start_win - tbl->start_win), tbl->win_size) :
  47                       tbl->win_size;
  48
  49         for (i = 0; i < pkt_to_send; ++i) {
  50                 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
  51                 rx_tmp_ptr = NULL;
  52                 if (tbl->rx_reorder_ptr[i]) {
  53                         rx_tmp_ptr = tbl->rx_reorder_ptr[i];
  54                         tbl->rx_reorder_ptr[i] = NULL;
  55                 }
  56                 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
  57                 if (rx_tmp_ptr) {
  58                         if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
  59                                 mwifiex_handle_uap_rx_forward(priv, rx_tmp_ptr);
  60                         else
  61                                 mwifiex_process_rx_packet(priv, rx_tmp_ptr);
  62                 }
  63         }
  64
  65         spin_lock_irqsave(&priv->rx_pkt_lock, flags);
  66         /*
  67          * We don't have a circular buffer, hence use rotation to simulate
  68          * circular buffer
  69          */
  70         for (i = 0; i < tbl->win_size - pkt_to_send; ++i) {
  71                 tbl->rx_reorder_ptr[i] = tbl->rx_reorder_ptr[pkt_to_send + i];
  72                 tbl->rx_reorder_ptr[pkt_to_send + i] = NULL;
  73         }
  74
  75         tbl->start_win = start_win;
  76         spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
  77 }
  78
  79 /*
  80  * This function dispatches all packets in the Rx reorder table until
  81  * a hole is found.
  82  *
  83  * The start window is adjusted automatically when a hole is located.
  84  * Since the buffer is linear, the function uses rotation to simulate
  85  * circular buffer.
  86  */
  87 static void
  88 mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv,
  89                               struct mwifiex_rx_reorder_tbl *tbl)
  90 {
  91         int i, j, xchg;
  92         void *rx_tmp_ptr;
  93         unsigned long flags;
  94
  95         for (i = 0; i < tbl->win_size; ++i) {
  96                 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
  97                 if (!tbl->rx_reorder_ptr[i]) {
  98                         spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
  99                         break;
 100                 }
 101                 rx_tmp_ptr = tbl->rx_reorder_ptr[i];
 102                 tbl->rx_reorder_ptr[i] = NULL;
 103                 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
 104
 105                 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
 106                         mwifiex_handle_uap_rx_forward(priv, rx_tmp_ptr);
 107                 else
 108                         mwifiex_process_rx_packet(priv, rx_tmp_ptr);
 109         }
 110
 111         spin_lock_irqsave(&priv->rx_pkt_lock, flags);
 112         /*
 113          * We don't have a circular buffer, hence use rotation to simulate
 114          * circular buffer
 115          */
 116         if (i > 0) {
 117                 xchg = tbl->win_size - i;
 118                 for (j = 0; j < xchg; ++j) {
 119                         tbl->rx_reorder_ptr[j] = tbl->rx_reorder_ptr[i + j];
 120                         tbl->rx_reorder_ptr[i + j] = NULL;
 121                 }
 122         }
 123         tbl->start_win = (tbl->start_win + i) & (MAX_TID_VALUE - 1);
 124         spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
 125 }
 126
 127 /*
 128  * This function deletes the Rx reorder table and frees the memory.
 129  *
 130  * The function stops the associated timer and dispatches all the
 131  * pending packets in the Rx reorder table before deletion.
 132  */
 133 static void
 134 mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv,
 135                              struct mwifiex_rx_reorder_tbl *tbl)
 136 {
 137         unsigned long flags;
 138
 139         if (!tbl)
 140                 return;
 141
 142         mwifiex_11n_dispatch_pkt(priv, tbl, (tbl->start_win + tbl->win_size) &
 143                                             (MAX_TID_VALUE - 1));
 144
 145         del_timer(&tbl->timer_context.timer);
 146
 147         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 148         list_del(&tbl->list);
 149         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 150
 151         kfree(tbl->rx_reorder_ptr);
 152         kfree(tbl);
 153 }
 154
 155 /*
 156  * This function returns the pointer to an entry in Rx reordering
 157  * table which matches the given TA/TID pair.
 158  */
 159 struct mwifiex_rx_reorder_tbl *
 160 mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta)
 161 {
 162         struct mwifiex_rx_reorder_tbl *tbl;
 163         unsigned long flags;
 164
 165         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 166         list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) {
 167                 if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) {
 168                         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
 169                                                flags);
 170                         return tbl;
 171                 }
 172         }
 173         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 174
 175         return NULL;
 176 }
 177
 178 /* This function retrieves the pointer to an entry in Rx reordering
 179  * table which matches the given TA and deletes it.
 180  */
 181 void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta)
 182 {
 183         struct mwifiex_rx_reorder_tbl *tbl, *tmp;
 184         unsigned long flags;
 185
 186         if (!ta)
 187                 return;
 188
 189         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 190         list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) {
 191                 if (!memcmp(tbl->ta, ta, ETH_ALEN)) {
 192                         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
 193                                                flags);
 194                         mwifiex_del_rx_reorder_entry(priv, tbl);
 195                         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 196                 }
 197         }
 198         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 199
 200         return;
 201 }
 202
 203 /*
 204  * This function finds the last sequence number used in the packets
 205  * buffered in Rx reordering table.
 206  */
 207 static int
 208 mwifiex_11n_find_last_seq_num(struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr)
 209 {
 210         int i;
 211
 212         for (i = (rx_reorder_tbl_ptr->win_size - 1); i >= 0; --i)
 213                 if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
 214                         return i;
 215
 216         return -1;
 217 }
 218
 219 /*
 220  * This function flushes all the packets in Rx reordering table.
 221  *
 222  * The function checks if any packets are currently buffered in the
 223  * table or not. In case there are packets available, it dispatches
 224  * them and then dumps the Rx reordering table.
 225  */
 226 static void
 227 mwifiex_flush_data(unsigned long context)
 228 {
 229         struct reorder_tmr_cnxt *ctx =
 230                 (struct reorder_tmr_cnxt *) context;
 231         int start_win;
 232
 233         start_win = mwifiex_11n_find_last_seq_num(ctx->ptr);
 234
 235         if (start_win < 0)
 236                 return;
 237
 238         dev_dbg(ctx->priv->adapter->dev, "info: flush data %d\n", start_win);
 239         mwifiex_11n_dispatch_pkt(ctx->priv, ctx->ptr,
 240                                  (ctx->ptr->start_win + start_win + 1) &
 241                                  (MAX_TID_VALUE - 1));
 242 }
 243
 244 /*
 245  * This function creates an entry in Rx reordering table for the
 246  * given TA/TID.
 247  *
 248  * The function also initializes the entry with sequence number, window
 249  * size as well as initializes the timer.
 250  *
 251  * If the received TA/TID pair is already present, all the packets are
 252  * dispatched and the window size is moved until the SSN.
 253  */
 254 static void
 255 mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta,
 256                                   int tid, int win_size, int seq_num)
 257 {
 258         int i;
 259         struct mwifiex_rx_reorder_tbl *tbl, *new_node;
 260         u16 last_seq = 0;
 261         unsigned long flags;
 262         struct mwifiex_sta_node *node;
 263
 264         /*
 265          * If we get a TID, ta pair which is already present dispatch all the
 266          * the packets and move the window size until the ssn
 267          */
 268         tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
 269         if (tbl) {
 270                 mwifiex_11n_dispatch_pkt(priv, tbl, seq_num);
 271                 return;
 272         }
 273         /* if !tbl then create one */
 274         new_node = kzalloc(sizeof(struct mwifiex_rx_reorder_tbl), GFP_KERNEL);
 275         if (!new_node)
 276                 return;
 277
 278         INIT_LIST_HEAD(&new_node->list);
 279         new_node->tid = tid;
 280         memcpy(new_node->ta, ta, ETH_ALEN);
 281         new_node->start_win = seq_num;
 282
 283         if (mwifiex_queuing_ra_based(priv)) {
 284                 dev_dbg(priv->adapter->dev,
 285                         "info: AP/ADHOC:last_seq=%d start_win=%d\n",
 286                         last_seq, new_node->start_win);
 287                 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) {
 288                         node = mwifiex_get_sta_entry(priv, ta);
 289                         if (node)
 290                                 last_seq = node->rx_seq[tid];
 291                 }
 292         } else {
 293                 last_seq = priv->rx_seq[tid];
 294         }
 295
 296         if (last_seq != MWIFIEX_DEF_11N_RX_SEQ_NUM &&
 297             last_seq >= new_node->start_win)
 298                 new_node->start_win = last_seq + 1;
 299
 300         new_node->win_size = win_size;
 301         new_node->flags = 0;
 302
 303         new_node->rx_reorder_ptr = kzalloc(sizeof(void *) * win_size,
 304                                         GFP_KERNEL);
 305         if (!new_node->rx_reorder_ptr) {
 306                 kfree((u8 *) new_node);
 307                 dev_err(priv->adapter->dev,
 308                         "%s: failed to alloc reorder_ptr\n", __func__);
 309                 return;
 310         }
 311
 312         new_node->timer_context.ptr = new_node;
 313         new_node->timer_context.priv = priv;
 314
 315         init_timer(&new_node->timer_context.timer);
 316         new_node->timer_context.timer.function = mwifiex_flush_data;
 317         new_node->timer_context.timer.data =
 318                         (unsigned long) &new_node->timer_context;
 319
 320         for (i = 0; i < win_size; ++i)
 321                 new_node->rx_reorder_ptr[i] = NULL;
 322
 323         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 324         list_add_tail(&new_node->list, &priv->rx_reorder_tbl_ptr);
 325         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 326 }
 327
 328 /*
 329  * This function prepares command for adding a BA request.
 330  *
 331  * Preparation includes -
 332  *      - Setting command ID and proper size
 333  *      - Setting add BA request buffer
 334  *      - Ensuring correct endian-ness
 335  */
 336 int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf)
 337 {
 338         struct host_cmd_ds_11n_addba_req *add_ba_req = &cmd->params.add_ba_req;
 339
 340         cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_REQ);
 341         cmd->size = cpu_to_le16(sizeof(*add_ba_req) + S_DS_GEN);
 342         memcpy(add_ba_req, data_buf, sizeof(*add_ba_req));
 343
 344         return 0;
 345 }
 346
 347 /*
 348  * This function prepares command for adding a BA response.
 349  *
 350  * Preparation includes -
 351  *      - Setting command ID and proper size
 352  *      - Setting add BA response buffer
 353  *      - Ensuring correct endian-ness
 354  */
 355 int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv,
 356                                   struct host_cmd_ds_command *cmd,
 357                                   struct host_cmd_ds_11n_addba_req
 358                                   *cmd_addba_req)
 359 {
 360         struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &cmd->params.add_ba_rsp;
 361         u8 tid;
 362         int win_size;
 363         uint16_t block_ack_param_set;
 364
 365         cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_RSP);
 366         cmd->size = cpu_to_le16(sizeof(*add_ba_rsp) + S_DS_GEN);
 367
 368         memcpy(add_ba_rsp->peer_mac_addr, cmd_addba_req->peer_mac_addr,
 369                ETH_ALEN);
 370         add_ba_rsp->dialog_token = cmd_addba_req->dialog_token;
 371         add_ba_rsp->block_ack_tmo = cmd_addba_req->block_ack_tmo;
 372         add_ba_rsp->ssn = cmd_addba_req->ssn;
 373
 374         block_ack_param_set = le16_to_cpu(cmd_addba_req->block_ack_param_set);
 375         tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
 376                 >> BLOCKACKPARAM_TID_POS;
 377         add_ba_rsp->status_code = cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT);
 378         block_ack_param_set &= ~IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK;
 379         /* We donot support AMSDU inside AMPDU, hence reset the bit */
 380         block_ack_param_set &= ~BLOCKACKPARAM_AMSDU_SUPP_MASK;
 381         block_ack_param_set |= (priv->add_ba_param.rx_win_size <<
 382                                              BLOCKACKPARAM_WINSIZE_POS);
 383         add_ba_rsp->block_ack_param_set = cpu_to_le16(block_ack_param_set);
 384         win_size = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
 385                                         & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
 386                                         >> BLOCKACKPARAM_WINSIZE_POS;
 387         cmd_addba_req->block_ack_param_set = cpu_to_le16(block_ack_param_set);
 388
 389         mwifiex_11n_create_rx_reorder_tbl(priv, cmd_addba_req->peer_mac_addr,
 390                                           tid, win_size,
 391                                           le16_to_cpu(cmd_addba_req->ssn));
 392         return 0;
 393 }
 394
 395 /*
 396  * This function prepares command for deleting a BA request.
 397  *
 398  * Preparation includes -
 399  *      - Setting command ID and proper size
 400  *      - Setting del BA request buffer
 401  *      - Ensuring correct endian-ness
 402  */
 403 int mwifiex_cmd_11n_delba(struct host_cmd_ds_command *cmd, void *data_buf)
 404 {
 405         struct host_cmd_ds_11n_delba *del_ba = &cmd->params.del_ba;
 406
 407         cmd->command = cpu_to_le16(HostCmd_CMD_11N_DELBA);
 408         cmd->size = cpu_to_le16(sizeof(*del_ba) + S_DS_GEN);
 409         memcpy(del_ba, data_buf, sizeof(*del_ba));
 410
 411         return 0;
 412 }
 413
 414 /*
 415  * This function identifies if Rx reordering is needed for a received packet.
 416  *
 417  * In case reordering is required, the function will do the reordering
 418  * before sending it to kernel.
 419  *
 420  * The Rx reorder table is checked first with the received TID/TA pair. If
 421  * not found, the received packet is dispatched immediately. But if found,
 422  * the packet is reordered and all the packets in the updated Rx reordering
 423  * table is dispatched until a hole is found.
 424  *
 425  * For sequence number less than the starting window, the packet is dropped.
 426  */
 427 int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
 428                                 u16 seq_num, u16 tid,
 429                                 u8 *ta, u8 pkt_type, void *payload)
 430 {
 431         struct mwifiex_rx_reorder_tbl *tbl;
 432         int start_win, end_win, win_size;
 433         u16 pkt_index;
 434
 435         tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
 436         if (!tbl) {
 437                 if (pkt_type != PKT_TYPE_BAR) {
 438                         if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
 439                                 mwifiex_handle_uap_rx_forward(priv, payload);
 440                         else
 441                                 mwifiex_process_rx_packet(priv, payload);
 442                 }
 443                 return 0;
 444         }
 445         start_win = tbl->start_win;
 446         win_size = tbl->win_size;
 447         end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
 448         del_timer(&tbl->timer_context.timer);
 449         mod_timer(&tbl->timer_context.timer,
 450                   jiffies + msecs_to_jiffies(MIN_FLUSH_TIMER_MS * win_size));
 451
 452         /*
 453          * If seq_num is less then starting win then ignore and drop the
 454          * packet
 455          */
 456         if (tbl->flags & RXREOR_FORCE_NO_DROP) {
 457                 dev_dbg(priv->adapter->dev,
 458                         "RXREOR_FORCE_NO_DROP when HS is activated\n");
 459                 tbl->flags &= ~RXREOR_FORCE_NO_DROP;
 460         } else {
 461                 if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
 462                         if (seq_num >= ((start_win + TWOPOW11) &
 463                                         (MAX_TID_VALUE - 1)) &&
 464                             seq_num < start_win)
 465                                 return -1;
 466                 } else if ((seq_num < start_win) ||
 467                            (seq_num > (start_win + TWOPOW11))) {
 468                         return -1;
 469                 }
 470         }
 471
 472         /*
 473          * If this packet is a BAR we adjust seq_num as
 474          * WinStart = seq_num
 475          */
 476         if (pkt_type == PKT_TYPE_BAR)
 477                 seq_num = ((seq_num + win_size) - 1) & (MAX_TID_VALUE - 1);
 478
 479         if (((end_win < start_win) &&
 480              (seq_num < start_win) && (seq_num > end_win)) ||
 481             ((end_win > start_win) && ((seq_num > end_win) ||
 482                                        (seq_num < start_win)))) {
 483                 end_win = seq_num;
 484                 if (((seq_num - win_size) + 1) >= 0)
 485                         start_win = (end_win - win_size) + 1;
 486                 else
 487                         start_win = (MAX_TID_VALUE - (win_size - seq_num)) + 1;
 488                 mwifiex_11n_dispatch_pkt(priv, tbl, start_win);
 489         }
 490
 491         if (pkt_type != PKT_TYPE_BAR) {
 492                 if (seq_num >= start_win)
 493                         pkt_index = seq_num - start_win;
 494                 else
 495                         pkt_index = (seq_num+MAX_TID_VALUE) - start_win;
 496
 497                 if (tbl->rx_reorder_ptr[pkt_index])
 498                         return -1;
 499
 500                 tbl->rx_reorder_ptr[pkt_index] = payload;
 501         }
 502
 503         /*
 504          * Dispatch all packets sequentially from start_win until a
 505          * hole is found and adjust the start_win appropriately
 506          */
 507         mwifiex_11n_scan_and_dispatch(priv, tbl);
 508
 509         return 0;
 510 }
 511
 512 /*
 513  * This function deletes an entry for a given TID/TA pair.
 514  *
 515  * The TID/TA are taken from del BA event body.
 516  */
 517 void
 518 mwifiex_del_ba_tbl(struct mwifiex_private *priv, int tid, u8 *peer_mac,
 519                    u8 type, int initiator)
 520 {
 521         struct mwifiex_rx_reorder_tbl *tbl;
 522         struct mwifiex_tx_ba_stream_tbl *ptx_tbl;
 523         u8 cleanup_rx_reorder_tbl;
 524         unsigned long flags;
 525
 526         if (type == TYPE_DELBA_RECEIVE)
 527                 cleanup_rx_reorder_tbl = (initiator) ? true : false;
 528         else
 529                 cleanup_rx_reorder_tbl = (initiator) ? false : true;
 530
 531         dev_dbg(priv->adapter->dev, "event: DELBA: %pM tid=%d initiator=%d\n",
 532                 peer_mac, tid, initiator);
 533
 534         if (cleanup_rx_reorder_tbl) {
 535                 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
 536                                                                  peer_mac);
 537                 if (!tbl) {
 538                         dev_dbg(priv->adapter->dev,
 539                                 "event: TID, TA not found in table\n");
 540                         return;
 541                 }
 542                 mwifiex_del_rx_reorder_entry(priv, tbl);
 543         } else {
 544                 ptx_tbl = mwifiex_get_ba_tbl(priv, tid, peer_mac);
 545                 if (!ptx_tbl) {
 546                         dev_dbg(priv->adapter->dev,
 547                                 "event: TID, RA not found in table\n");
 548                         return;
 549                 }
 550
 551                 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 552                 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl);
 553                 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 554         }
 555 }
 556
 557 /*
 558  * This function handles the command response of an add BA response.
 559  *
 560  * Handling includes changing the header fields into CPU format and
 561  * creating the stream, provided the add BA is accepted.
 562  */
 563 int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv,
 564                                struct host_cmd_ds_command *resp)
 565 {
 566         struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
 567         int tid, win_size;
 568         struct mwifiex_rx_reorder_tbl *tbl;
 569         uint16_t block_ack_param_set;
 570
 571         block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
 572
 573         tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
 574                 >> BLOCKACKPARAM_TID_POS;
 575         /*
 576          * Check if we had rejected the ADDBA, if yes then do not create
 577          * the stream
 578          */
 579         if (le16_to_cpu(add_ba_rsp->status_code) == BA_RESULT_SUCCESS) {
 580                 win_size = (block_ack_param_set &
 581                         IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
 582                         >> BLOCKACKPARAM_WINSIZE_POS;
 583
 584                 dev_dbg(priv->adapter->dev,
 585                         "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n",
 586                         add_ba_rsp->peer_mac_addr, tid,
 587                         add_ba_rsp->ssn, win_size);
 588         } else {
 589                 dev_err(priv->adapter->dev, "ADDBA RSP: failed %pM tid=%d)\n",
 590                         add_ba_rsp->peer_mac_addr, tid);
 591
 592                 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
 593                                                      add_ba_rsp->peer_mac_addr);
 594                 if (tbl)
 595                         mwifiex_del_rx_reorder_entry(priv, tbl);
 596         }
 597
 598         return 0;
 599 }
 600
 601 /*
 602  * This function handles BA stream timeout event by preparing and sending
 603  * a command to the firmware.
 604  */
 605 void mwifiex_11n_ba_stream_timeout(struct mwifiex_private *priv,
 606                                    struct host_cmd_ds_11n_batimeout *event)
 607 {
 608         struct host_cmd_ds_11n_delba delba;
 609
 610         memset(&delba, 0, sizeof(struct host_cmd_ds_11n_delba));
 611         memcpy(delba.peer_mac_addr, event->peer_mac_addr, ETH_ALEN);
 612
 613         delba.del_ba_param_set |=
 614                 cpu_to_le16((u16) event->tid << DELBA_TID_POS);
 615         delba.del_ba_param_set |= cpu_to_le16(
 616                 (u16) event->origninator << DELBA_INITIATOR_POS);
 617         delba.reason_code = cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT);
 618         mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_DELBA, 0, 0, &delba);
 619 }
 620
 621 /*
 622  * This function cleans up the Rx reorder table by deleting all the entries
 623  * and re-initializing.
 624  */
 625 void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv)
 626 {
 627         struct mwifiex_rx_reorder_tbl *del_tbl_ptr, *tmp_node;
 628         unsigned long flags;
 629
 630         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 631         list_for_each_entry_safe(del_tbl_ptr, tmp_node,
 632                                  &priv->rx_reorder_tbl_ptr, list) {
 633                 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 634                 mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr);
 635                 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 636         }
 637         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 638
 639         INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 640         mwifiex_reset_11n_rx_seq_num(priv);
 641 }
 642
 643 /*
 644  * This function updates all rx_reorder_tbl's flags.
 645  */
 646 void mwifiex_update_rxreor_flags(struct mwifiex_adapter *adapter, u8 flags)
 647 {
 648         struct mwifiex_private *priv;
 649         struct mwifiex_rx_reorder_tbl *tbl;
 650         unsigned long lock_flags;
 651         int i;
 652
 653         for (i = 0; i < adapter->priv_num; i++) {
 654                 priv = adapter->priv[i];
 655                 if (!priv)
 656                         continue;
 657                 if (list_empty(&priv->rx_reorder_tbl_ptr))
 658                         continue;
 659
 660                 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, lock_flags);
 661                 list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list)
 662                         tbl->flags = flags;
 663                 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, lock_flags);
 664         }
 665
 666         return;
 667 }