drivers/net/wireless/mwifiex/wmm.c

   1 /*
   2  * Marvell Wireless LAN device driver: WMM
   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
  28
  29 /* Maximum value FW can accept for driver delay in packet transmission */
  30 #define DRV_PKT_DELAY_TO_FW_MAX   512
  31
  32
  33 #define WMM_QUEUED_PACKET_LOWER_LIMIT   180
  34
  35 #define WMM_QUEUED_PACKET_UPPER_LIMIT   200
  36
  37 /* Offset for TOS field in the IP header */
  38 #define IPTOS_OFFSET 5
  39
  40 /* WMM information IE */
  41 static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
  42         0x00, 0x50, 0xf2, 0x02,
  43         0x00, 0x01, 0x00
  44 };
  45
  46 static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
  47         WMM_AC_BK,
  48         WMM_AC_VI,
  49         WMM_AC_VO
  50 };
  51
  52 static u8 tos_to_tid[] = {
  53         /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */
  54         0x01,                   /* 0 1 0 AC_BK */
  55         0x02,                   /* 0 0 0 AC_BK */
  56         0x00,                   /* 0 0 1 AC_BE */
  57         0x03,                   /* 0 1 1 AC_BE */
  58         0x04,                   /* 1 0 0 AC_VI */
  59         0x05,                   /* 1 0 1 AC_VI */
  60         0x06,                   /* 1 1 0 AC_VO */
  61         0x07                    /* 1 1 1 AC_VO */
  62 };
  63
  64 /*
  65  * This table inverses the tos_to_tid operation to get a priority
  66  * which is in sequential order, and can be compared.
  67  * Use this to compare the priority of two different TIDs.
  68  */
  69 static u8 tos_to_tid_inv[] = {
  70         0x02,  /* from tos_to_tid[2] = 0 */
  71         0x00,  /* from tos_to_tid[0] = 1 */
  72         0x01,  /* from tos_to_tid[1] = 2 */
  73         0x03,
  74         0x04,
  75         0x05,
  76         0x06,
  77         0x07};
  78
  79 static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} };
  80
  81 /*
  82  * This function debug prints the priority parameters for a WMM AC.
  83  */
  84 static void
  85 mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param)
  86 {
  87         const char *ac_str[] = { "BK", "BE", "VI", "VO" };
  88
  89         pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, "
  90                  "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
  91                  ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap
  92                                              & MWIFIEX_ACI) >> 5]],
  93                  (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5,
  94                  (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4,
  95                  ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN,
  96                  ac_param->ecw_bitmap & MWIFIEX_ECW_MIN,
  97                  (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4,
  98                  le16_to_cpu(ac_param->tx_op_limit));
  99 }
 100
 101 /*
 102  * This function allocates a route address list.
 103  *
 104  * The function also initializes the list with the provided RA.
 105  */
 106 static struct mwifiex_ra_list_tbl *
 107 mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, u8 *ra)
 108 {
 109         struct mwifiex_ra_list_tbl *ra_list;
 110
 111         ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC);
 112
 113         if (!ra_list) {
 114                 dev_err(adapter->dev, "%s: failed to alloc ra_list\n",
 115                         __func__);
 116                 return NULL;
 117         }
 118         INIT_LIST_HEAD(&ra_list->list);
 119         skb_queue_head_init(&ra_list->skb_head);
 120
 121         memcpy(ra_list->ra, ra, ETH_ALEN);
 122
 123         ra_list->total_pkts_size = 0;
 124
 125         dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list);
 126
 127         return ra_list;
 128 }
 129
 130 /*
 131  * This function allocates and adds a RA list for all TIDs
 132  * with the given RA.
 133  */
 134 void
 135 mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
 136 {
 137         int i;
 138         struct mwifiex_ra_list_tbl *ra_list;
 139         struct mwifiex_adapter *adapter = priv->adapter;
 140
 141         for (i = 0; i < MAX_NUM_TID; ++i) {
 142                 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
 143                 dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);
 144
 145                 if (!ra_list)
 146                         break;
 147
 148                 if (!mwifiex_queuing_ra_based(priv))
 149                         ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
 150                 else
 151                         ra_list->is_11n_enabled = false;
 152
 153                 dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
 154                         ra_list, ra_list->is_11n_enabled);
 155
 156                 list_add_tail(&ra_list->list,
 157                               &priv->wmm.tid_tbl_ptr[i].ra_list);
 158
 159                 if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
 160                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
 161         }
 162 }
 163
 164 /*
 165  * This function sets the WMM queue priorities to their default values.
 166  */
 167 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
 168 {
 169         /* Default queue priorities: VO->VI->BE->BK */
 170         priv->wmm.queue_priority[0] = WMM_AC_VO;
 171         priv->wmm.queue_priority[1] = WMM_AC_VI;
 172         priv->wmm.queue_priority[2] = WMM_AC_BE;
 173         priv->wmm.queue_priority[3] = WMM_AC_BK;
 174 }
 175
 176 /*
 177  * This function map ACs to TIDs.
 178  */
 179 static void
 180 mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
 181 {
 182         u8 *queue_priority = wmm->queue_priority;
 183         int i;
 184
 185         for (i = 0; i < 4; ++i) {
 186                 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
 187                 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
 188         }
 189
 190         for (i = 0; i < MAX_NUM_TID; ++i)
 191                 tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
 192
 193         atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
 194 }
 195
 196 /*
 197  * This function initializes WMM priority queues.
 198  */
 199 void
 200 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
 201                                    struct ieee_types_wmm_parameter *wmm_ie)
 202 {
 203         u16 cw_min, avg_back_off, tmp[4];
 204         u32 i, j, num_ac;
 205         u8 ac_idx;
 206
 207         if (!wmm_ie || !priv->wmm_enabled) {
 208                 /* WMM is not enabled, just set the defaults and return */
 209                 mwifiex_wmm_default_queue_priorities(priv);
 210                 return;
 211         }
 212
 213         dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
 214                 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
 215                 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
 216                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
 217                 wmm_ie->reserved);
 218
 219         for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
 220                 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
 221                 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
 222                 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
 223                 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
 224
 225                 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
 226                 priv->wmm.queue_priority[ac_idx] = ac_idx;
 227                 tmp[ac_idx] = avg_back_off;
 228
 229                 dev_dbg(priv->adapter->dev,
 230                         "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
 231                         (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
 232                         cw_min, avg_back_off);
 233                 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
 234         }
 235
 236         /* Bubble sort */
 237         for (i = 0; i < num_ac; i++) {
 238                 for (j = 1; j < num_ac - i; j++) {
 239                         if (tmp[j - 1] > tmp[j]) {
 240                                 swap(tmp[j - 1], tmp[j]);
 241                                 swap(priv->wmm.queue_priority[j - 1],
 242                                      priv->wmm.queue_priority[j]);
 243                         } else if (tmp[j - 1] == tmp[j]) {
 244                                 if (priv->wmm.queue_priority[j - 1]
 245                                     < priv->wmm.queue_priority[j])
 246                                         swap(priv->wmm.queue_priority[j - 1],
 247                                              priv->wmm.queue_priority[j]);
 248                         }
 249                 }
 250         }
 251
 252         mwifiex_wmm_queue_priorities_tid(&priv->wmm);
 253 }
 254
 255 /*
 256  * This function evaluates whether or not an AC is to be downgraded.
 257  *
 258  * In case the AC is not enabled, the highest AC is returned that is
 259  * enabled and does not require admission control.
 260  */
 261 static enum mwifiex_wmm_ac_e
 262 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
 263                               enum mwifiex_wmm_ac_e eval_ac)
 264 {
 265         int down_ac;
 266         enum mwifiex_wmm_ac_e ret_ac;
 267         struct mwifiex_wmm_ac_status *ac_status;
 268
 269         ac_status = &priv->wmm.ac_status[eval_ac];
 270
 271         if (!ac_status->disabled)
 272                 /* Okay to use this AC, its enabled */
 273                 return eval_ac;
 274
 275         /* Setup a default return value of the lowest priority */
 276         ret_ac = WMM_AC_BK;
 277
 278         /*
 279          *  Find the highest AC that is enabled and does not require
 280          *  admission control. The spec disallows downgrading to an AC,
 281          *  which is enabled due to a completed admission control.
 282          *  Unadmitted traffic is not to be sent on an AC with admitted
 283          *  traffic.
 284          */
 285         for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
 286                 ac_status = &priv->wmm.ac_status[down_ac];
 287
 288                 if (!ac_status->disabled && !ac_status->flow_required)
 289                         /* AC is enabled and does not require admission
 290                            control */
 291                         ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
 292         }
 293
 294         return ret_ac;
 295 }
 296
 297 /*
 298  * This function downgrades WMM priority queue.
 299  */
 300 void
 301 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
 302 {
 303         int ac_val;
 304
 305         dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
 306                         "BK(0), BE(1), VI(2), VO(3)\n");
 307
 308         if (!priv->wmm_enabled) {
 309                 /* WMM is not enabled, default priorities */
 310                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
 311                         priv->wmm.ac_down_graded_vals[ac_val] =
 312                                                 (enum mwifiex_wmm_ac_e) ac_val;
 313         } else {
 314                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
 315                         priv->wmm.ac_down_graded_vals[ac_val]
 316                                 = mwifiex_wmm_eval_downgrade_ac(priv,
 317                                                 (enum mwifiex_wmm_ac_e) ac_val);
 318                         dev_dbg(priv->adapter->dev,
 319                                 "info: WMM: AC PRIO %d maps to %d\n",
 320                                 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
 321                 }
 322         }
 323 }
 324
 325 /*
 326  * This function converts the IP TOS field to an WMM AC
 327  * Queue assignment.
 328  */
 329 static enum mwifiex_wmm_ac_e
 330 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
 331 {
 332         /* Map of TOS UP values to WMM AC */
 333         const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
 334                 WMM_AC_BK,
 335                 WMM_AC_BK,
 336                 WMM_AC_BE,
 337                 WMM_AC_VI,
 338                 WMM_AC_VI,
 339                 WMM_AC_VO,
 340                 WMM_AC_VO
 341         };
 342
 343         if (tos >= ARRAY_SIZE(tos_to_ac))
 344                 return WMM_AC_BE;
 345
 346         return tos_to_ac[tos];
 347 }
 348
 349 /*
 350  * This function evaluates a given TID and downgrades it to a lower
 351  * TID if the WMM Parameter IE received from the AP indicates that the
 352  * AP is disabled (due to call admission control (ACM bit). Mapping
 353  * of TID to AC is taken care of internally.
 354  */
 355 static u8
 356 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
 357 {
 358         enum mwifiex_wmm_ac_e ac, ac_down;
 359         u8 new_tid;
 360
 361         ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
 362         ac_down = priv->wmm.ac_down_graded_vals[ac];
 363
 364         /* Send the index to tid array, picking from the array will be
 365          * taken care by dequeuing function
 366          */
 367         new_tid = ac_to_tid[ac_down][tid % 2];
 368
 369         return new_tid;
 370 }
 371
 372 /*
 373  * This function initializes the WMM state information and the
 374  * WMM data path queues.
 375  */
 376 void
 377 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
 378 {
 379         int i, j;
 380         struct mwifiex_private *priv;
 381
 382         for (j = 0; j < adapter->priv_num; ++j) {
 383                 priv = adapter->priv[j];
 384                 if (!priv)
 385                         continue;
 386
 387                 for (i = 0; i < MAX_NUM_TID; ++i) {
 388                         priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
 389                         priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
 390                         priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
 391                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 392                 }
 393
 394                 priv->aggr_prio_tbl[6].amsdu
 395                                         = priv->aggr_prio_tbl[6].ampdu_ap
 396                                         = priv->aggr_prio_tbl[6].ampdu_user
 397                                         = BA_STREAM_NOT_ALLOWED;
 398
 399                 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
 400                                         = priv->aggr_prio_tbl[7].ampdu_user
 401                                         = BA_STREAM_NOT_ALLOWED;
 402
 403                 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
 404                 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
 405                 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
 406
 407                 mwifiex_reset_11n_rx_seq_num(priv);
 408
 409                 atomic_set(&priv->wmm.tx_pkts_queued, 0);
 410                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 411         }
 412 }
 413
 414 /*
 415  * This function checks if WMM Tx queue is empty.
 416  */
 417 int
 418 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
 419 {
 420         int i;
 421         struct mwifiex_private *priv;
 422
 423         for (i = 0; i < adapter->priv_num; ++i) {
 424                 priv = adapter->priv[i];
 425                 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
 426                                 return false;
 427         }
 428
 429         return true;
 430 }
 431
 432 /*
 433  * This function deletes all packets in an RA list node.
 434  *
 435  * The packet sent completion callback handler are called with
 436  * status failure, after they are dequeued to ensure proper
 437  * cleanup. The RA list node itself is freed at the end.
 438  */
 439 static void
 440 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
 441                                     struct mwifiex_ra_list_tbl *ra_list)
 442 {
 443         struct mwifiex_adapter *adapter = priv->adapter;
 444         struct sk_buff *skb, *tmp;
 445
 446         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
 447                 mwifiex_write_data_complete(adapter, skb, -1);
 448 }
 449
 450 /*
 451  * This function deletes all packets in an RA list.
 452  *
 453  * Each nodes in the RA list are freed individually first, and then
 454  * the RA list itself is freed.
 455  */
 456 static void
 457 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
 458                                struct list_head *ra_list_head)
 459 {
 460         struct mwifiex_ra_list_tbl *ra_list;
 461
 462         list_for_each_entry(ra_list, ra_list_head, list)
 463                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 464 }
 465
 466 /*
 467  * This function deletes all packets in all RA lists.
 468  */
 469 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
 470 {
 471         int i;
 472
 473         for (i = 0; i < MAX_NUM_TID; i++)
 474                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
 475                                                                        ra_list);
 476
 477         atomic_set(&priv->wmm.tx_pkts_queued, 0);
 478         atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 479 }
 480
 481 /*
 482  * This function deletes all route addresses from all RA lists.
 483  */
 484 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 485 {
 486         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
 487         int i;
 488
 489         for (i = 0; i < MAX_NUM_TID; ++i) {
 490                 dev_dbg(priv->adapter->dev,
 491                         "info: ra_list: freeing buf for tid %d\n", i);
 492                 list_for_each_entry_safe(ra_list, tmp_node,
 493                                          &priv->wmm.tid_tbl_ptr[i].ra_list,
 494                                          list) {
 495                         list_del(&ra_list->list);
 496                         kfree(ra_list);
 497                 }
 498
 499                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
 500
 501                 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 502         }
 503 }
 504
 505 /*
 506  * This function cleans up the Tx and Rx queues.
 507  *
 508  * Cleanup includes -
 509  *      - All packets in RA lists
 510  *      - All entries in Rx reorder table
 511  *      - All entries in Tx BA stream table
 512  *      - MPA buffer (if required)
 513  *      - All RA lists
 514  */
 515 void
 516 mwifiex_clean_txrx(struct mwifiex_private *priv)
 517 {
 518         unsigned long flags;
 519
 520         mwifiex_11n_cleanup_reorder_tbl(priv);
 521         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 522
 523         mwifiex_wmm_cleanup_queues(priv);
 524         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
 525
 526         if (priv->adapter->if_ops.cleanup_mpa_buf)
 527                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
 528
 529         mwifiex_wmm_delete_all_ralist(priv);
 530         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 531
 532         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 533 }
 534
 535 /*
 536  * This function retrieves a particular RA list node, matching with the
 537  * given TID and RA address.
 538  */
 539 static struct mwifiex_ra_list_tbl *
 540 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
 541                             u8 *ra_addr)
 542 {
 543         struct mwifiex_ra_list_tbl *ra_list;
 544
 545         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
 546                             list) {
 547                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
 548                         return ra_list;
 549         }
 550
 551         return NULL;
 552 }
 553
 554 /*
 555  * This function retrieves an RA list node for a given TID and
 556  * RA address pair.
 557  *
 558  * If no such node is found, a new node is added first and then
 559  * retrieved.
 560  */
 561 static struct mwifiex_ra_list_tbl *
 562 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
 563 {
 564         struct mwifiex_ra_list_tbl *ra_list;
 565
 566         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 567         if (ra_list)
 568                 return ra_list;
 569         mwifiex_ralist_add(priv, ra_addr);
 570
 571         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 572 }
 573
 574 /*
 575  * This function checks if a particular RA list node exists in a given TID
 576  * table index.
 577  */
 578 int
 579 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
 580                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
 581 {
 582         struct mwifiex_ra_list_tbl *rlist;
 583
 584         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
 585                             list) {
 586                 if (rlist == ra_list)
 587                         return true;
 588         }
 589
 590         return false;
 591 }
 592
 593 /*
 594  * This function adds a packet to WMM queue.
 595  *
 596  * In disconnected state the packet is immediately dropped and the
 597  * packet send completion callback is called with status failure.
 598  *
 599  * Otherwise, the correct RA list node is located and the packet
 600  * is queued at the list tail.
 601  */
 602 void
 603 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
 604                             struct sk_buff *skb)
 605 {
 606         struct mwifiex_adapter *adapter = priv->adapter;
 607         u32 tid;
 608         struct mwifiex_ra_list_tbl *ra_list;
 609         u8 ra[ETH_ALEN], tid_down;
 610         unsigned long flags;
 611
 612         if (!priv->media_connected) {
 613                 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
 614                 mwifiex_write_data_complete(adapter, skb, -1);
 615                 return;
 616         }
 617
 618         tid = skb->priority;
 619
 620         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 621
 622         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 623
 624         /* In case of infra as we have already created the list during
 625            association we just don't have to call get_queue_raptr, we will
 626            have only 1 raptr for a tid in case of infra */
 627         if (!mwifiex_queuing_ra_based(priv)) {
 628                 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
 629                         ra_list = list_first_entry(
 630                                 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
 631                                 struct mwifiex_ra_list_tbl, list);
 632                 else
 633                         ra_list = NULL;
 634         } else {
 635                 memcpy(ra, skb->data, ETH_ALEN);
 636                 if (ra[0] & 0x01)
 637                         memset(ra, 0xff, ETH_ALEN);
 638                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
 639         }
 640
 641         if (!ra_list) {
 642                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 643                 mwifiex_write_data_complete(adapter, skb, -1);
 644                 return;
 645         }
 646
 647         skb_queue_tail(&ra_list->skb_head, skb);
 648
 649         ra_list->total_pkts_size += skb->len;
 650
 651         atomic_inc(&priv->wmm.tx_pkts_queued);
 652
 653         if (atomic_read(&priv->wmm.highest_queued_prio) <
 654                                                 tos_to_tid_inv[tid_down])
 655                 atomic_set(&priv->wmm.highest_queued_prio,
 656                            tos_to_tid_inv[tid_down]);
 657
 658         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 659 }
 660
 661 /*
 662  * This function processes the get WMM status command response from firmware.
 663  *
 664  * The response may contain multiple TLVs -
 665  *      - AC Queue status TLVs
 666  *      - Current WMM Parameter IE TLV
 667  *      - Admission Control action frame TLVs
 668  *
 669  * This function parses the TLVs and then calls further specific functions
 670  * to process any changes in the queue prioritize or state.
 671  */
 672 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
 673                                const struct host_cmd_ds_command *resp)
 674 {
 675         u8 *curr = (u8 *) &resp->params.get_wmm_status;
 676         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
 677         int valid = true;
 678
 679         struct mwifiex_ie_types_data *tlv_hdr;
 680         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
 681         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
 682         struct mwifiex_wmm_ac_status *ac_status;
 683
 684         dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
 685                 resp_len);
 686
 687         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
 688                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
 689                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
 690
 691                 switch (le16_to_cpu(tlv_hdr->header.type)) {
 692                 case TLV_TYPE_WMMQSTATUS:
 693                         tlv_wmm_qstatus =
 694                                 (struct mwifiex_ie_types_wmm_queue_status *)
 695                                 tlv_hdr;
 696                         dev_dbg(priv->adapter->dev,
 697                                 "info: CMD_RESP: WMM_GET_STATUS:"
 698                                 " QSTATUS TLV: %d, %d, %d\n",
 699                                 tlv_wmm_qstatus->queue_index,
 700                                 tlv_wmm_qstatus->flow_required,
 701                                 tlv_wmm_qstatus->disabled);
 702
 703                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
 704                                                          queue_index];
 705                         ac_status->disabled = tlv_wmm_qstatus->disabled;
 706                         ac_status->flow_required =
 707                                                 tlv_wmm_qstatus->flow_required;
 708                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
 709                         break;
 710
 711                 case WLAN_EID_VENDOR_SPECIFIC:
 712                         /*
 713                          * Point the regular IEEE IE 2 bytes into the Marvell IE
 714                          *   and setup the IEEE IE type and length byte fields
 715                          */
 716
 717                         wmm_param_ie =
 718                                 (struct ieee_types_wmm_parameter *) (curr +
 719                                                                     2);
 720                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
 721                         wmm_param_ie->vend_hdr.element_id =
 722                                                 WLAN_EID_VENDOR_SPECIFIC;
 723
 724                         dev_dbg(priv->adapter->dev,
 725                                 "info: CMD_RESP: WMM_GET_STATUS:"
 726                                 " WMM Parameter Set Count: %d\n",
 727                                 wmm_param_ie->qos_info_bitmap &
 728                                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
 729
 730                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
 731                                wmm_ie, wmm_param_ie,
 732                                wmm_param_ie->vend_hdr.len + 2);
 733
 734                         break;
 735
 736                 default:
 737                         valid = false;
 738                         break;
 739                 }
 740
 741                 curr += (tlv_len + sizeof(tlv_hdr->header));
 742                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
 743         }
 744
 745         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
 746         mwifiex_wmm_setup_ac_downgrade(priv);
 747
 748         return 0;
 749 }
 750
 751 /*
 752  * Callback handler from the command module to allow insertion of a WMM TLV.
 753  *
 754  * If the BSS we are associating to supports WMM, this function adds the
 755  * required WMM Information IE to the association request command buffer in
 756  * the form of a Marvell extended IEEE IE.
 757  */
 758 u32
 759 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
 760                                     u8 **assoc_buf,
 761                                     struct ieee_types_wmm_parameter *wmm_ie,
 762                                     struct ieee80211_ht_cap *ht_cap)
 763 {
 764         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
 765         u32 ret_len = 0;
 766
 767         /* Null checks */
 768         if (!assoc_buf)
 769                 return 0;
 770         if (!(*assoc_buf))
 771                 return 0;
 772
 773         if (!wmm_ie)
 774                 return 0;
 775
 776         dev_dbg(priv->adapter->dev,
 777                 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
 778                 wmm_ie->vend_hdr.element_id);
 779
 780         if ((priv->wmm_required ||
 781              (ht_cap && (priv->adapter->config_bands & BAND_GN ||
 782              priv->adapter->config_bands & BAND_AN))) &&
 783             wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
 784                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
 785                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
 786                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
 787                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
 788                        le16_to_cpu(wmm_tlv->header.len));
 789                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
 790                         memcpy((u8 *) (wmm_tlv->wmm_ie
 791                                        + le16_to_cpu(wmm_tlv->header.len)
 792                                        - sizeof(priv->wmm_qosinfo)),
 793                                &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
 794
 795                 ret_len = sizeof(wmm_tlv->header)
 796                           + le16_to_cpu(wmm_tlv->header.len);
 797
 798                 *assoc_buf += ret_len;
 799         }
 800
 801         return ret_len;
 802 }
 803
 804 /*
 805  * This function computes the time delay in the driver queues for a
 806  * given packet.
 807  *
 808  * When the packet is received at the OS/Driver interface, the current
 809  * time is set in the packet structure. The difference between the present
 810  * time and that received time is computed in this function and limited
 811  * based on pre-compiled limits in the driver.
 812  */
 813 u8
 814 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
 815                                   const struct sk_buff *skb)
 816 {
 817         u8 ret_val;
 818         struct timeval out_tstamp, in_tstamp;
 819         u32 queue_delay;
 820
 821         do_gettimeofday(&out_tstamp);
 822         in_tstamp = ktime_to_timeval(skb->tstamp);
 823
 824         queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
 825         queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
 826
 827         /*
 828          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
 829          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
 830          *
 831          * Pass max value if queue_delay is beyond the uint8 range
 832          */
 833         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
 834
 835         dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
 836                                 " %d ms sent to FW\n", queue_delay, ret_val);
 837
 838         return ret_val;
 839 }
 840
 841 /*
 842  * This function retrieves the highest priority RA list table pointer.
 843  */
 844 static struct mwifiex_ra_list_tbl *
 845 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 846                                      struct mwifiex_private **priv, int *tid)
 847 {
 848         struct mwifiex_private *priv_tmp;
 849         struct mwifiex_ra_list_tbl *ptr, *head;
 850         struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
 851         struct mwifiex_tid_tbl *tid_ptr;
 852         atomic_t *hqp;
 853         int is_list_empty;
 854         unsigned long flags;
 855         int i, j;
 856
 857         for (j = adapter->priv_num - 1; j >= 0; --j) {
 858                 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
 859                                   flags);
 860                 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
 861                                            .bss_prio_head);
 862                 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
 863                                        flags);
 864                 if (is_list_empty)
 865                         continue;
 866
 867                 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
 868                     (struct mwifiex_bss_prio_node *)
 869                     &adapter->bss_prio_tbl[j].bss_prio_head) {
 870                         bssprio_node =
 871                                 list_first_entry(&adapter->bss_prio_tbl[j]
 872                                                  .bss_prio_head,
 873                                                  struct mwifiex_bss_prio_node,
 874                                                  list);
 875                         bssprio_head = bssprio_node;
 876                 } else {
 877                         bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
 878                         bssprio_head = bssprio_node;
 879                 }
 880
 881                 do {
 882                         priv_tmp = bssprio_node->priv;
 883                         hqp = &priv_tmp->wmm.highest_queued_prio;
 884
 885                         for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
 886
 887                                 tid_ptr = &(priv_tmp)->wmm.
 888                                         tid_tbl_ptr[tos_to_tid[i]];
 889
 890                                 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
 891                                                   flags);
 892                                 is_list_empty =
 893                                         list_empty(&adapter->bss_prio_tbl[j]
 894                                                    .bss_prio_head);
 895                                 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
 896                                                        flags);
 897                                 if (is_list_empty)
 898                                         continue;
 899
 900                                 /*
 901                                  * Always choose the next ra we transmitted
 902                                  * last time, this way we pick the ra's in
 903                                  * round robin fashion.
 904                                  */
 905                                 ptr = list_first_entry(
 906                                                 &tid_ptr->ra_list_curr->list,
 907                                                 struct mwifiex_ra_list_tbl,
 908                                                 list);
 909
 910                                 head = ptr;
 911                                 if (ptr == (struct mwifiex_ra_list_tbl *)
 912                                                 &tid_ptr->ra_list) {
 913                                         /* Get next ra */
 914                                         ptr = list_first_entry(&ptr->list,
 915                                             struct mwifiex_ra_list_tbl, list);
 916                                         head = ptr;
 917                                 }
 918
 919                                 do {
 920                                         is_list_empty =
 921                                                 skb_queue_empty(&ptr->skb_head);
 922
 923                                         if (!is_list_empty)
 924                                                 goto found;
 925
 926                                         /* Get next ra */
 927                                         ptr = list_first_entry(&ptr->list,
 928                                                  struct mwifiex_ra_list_tbl,
 929                                                  list);
 930                                         if (ptr ==
 931                                             (struct mwifiex_ra_list_tbl *)
 932                                             &tid_ptr->ra_list)
 933                                                 ptr = list_first_entry(
 934                                                     &ptr->list,
 935                                                     struct mwifiex_ra_list_tbl,
 936                                                     list);
 937                                 } while (ptr != head);
 938                         }
 939
 940                         /* No packet at any TID for this priv. Mark as such
 941                          * to skip checking TIDs for this priv (until pkt is
 942                          * added).
 943                          */
 944                         atomic_set(hqp, NO_PKT_PRIO_TID);
 945
 946                         /* Get next bss priority node */
 947                         bssprio_node = list_first_entry(&bssprio_node->list,
 948                                                 struct mwifiex_bss_prio_node,
 949                                                 list);
 950
 951                         if (bssprio_node ==
 952                             (struct mwifiex_bss_prio_node *)
 953                             &adapter->bss_prio_tbl[j].bss_prio_head)
 954                                 /* Get next bss priority node */
 955                                 bssprio_node = list_first_entry(
 956                                                 &bssprio_node->list,
 957                                                 struct mwifiex_bss_prio_node,
 958                                                 list);
 959                 } while (bssprio_node != bssprio_head);
 960         }
 961         return NULL;
 962
 963 found:
 964         spin_lock_irqsave(&priv_tmp->wmm.ra_list_spinlock, flags);
 965         if (atomic_read(hqp) > i)
 966                 atomic_set(hqp, i);
 967         spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags);
 968
 969         *priv = priv_tmp;
 970         *tid = tos_to_tid[i];
 971
 972         return ptr;
 973 }
 974
 975 /*
 976  * This function checks if 11n aggregation is possible.
 977  */
 978 static int
 979 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
 980                                     struct mwifiex_ra_list_tbl *ptr,
 981                                     int max_buf_size)
 982 {
 983         int count = 0, total_size = 0;
 984         struct sk_buff *skb, *tmp;
 985
 986         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
 987                 total_size += skb->len;
 988                 if (total_size >= max_buf_size)
 989                         break;
 990                 if (++count >= MIN_NUM_AMSDU)
 991                         return true;
 992         }
 993
 994         return false;
 995 }
 996
 997 /*
 998  * This function sends a single packet to firmware for transmission.
 999  */
1000 static void
1001 mwifiex_send_single_packet(struct mwifiex_private *priv,
1002                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1003                            unsigned long ra_list_flags)
1004                            __releases(&priv->wmm.ra_list_spinlock)
1005 {
1006         struct sk_buff *skb, *skb_next;
1007         struct mwifiex_tx_param tx_param;
1008         struct mwifiex_adapter *adapter = priv->adapter;
1009         struct mwifiex_txinfo *tx_info;
1010
1011         if (skb_queue_empty(&ptr->skb_head)) {
1012                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1013                                        ra_list_flags);
1014                 dev_dbg(adapter->dev, "data: nothing to send\n");
1015                 return;
1016         }
1017
1018         skb = skb_dequeue(&ptr->skb_head);
1019
1020         tx_info = MWIFIEX_SKB_TXCB(skb);
1021         dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1022
1023         ptr->total_pkts_size -= skb->len;
1024
1025         if (!skb_queue_empty(&ptr->skb_head))
1026                 skb_next = skb_peek(&ptr->skb_head);
1027         else
1028                 skb_next = NULL;
1029
1030         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1031
1032         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1033                                 sizeof(struct txpd) : 0);
1034
1035         if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1036                 /* Queue the packet back at the head */
1037                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1038
1039                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1040                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1041                                                ra_list_flags);
1042                         mwifiex_write_data_complete(adapter, skb, -1);
1043                         return;
1044                 }
1045
1046                 skb_queue_tail(&ptr->skb_head, skb);
1047
1048                 ptr->total_pkts_size += skb->len;
1049                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1050                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1051                                        ra_list_flags);
1052         } else {
1053                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1054                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1055                         priv->wmm.packets_out[ptr_index]++;
1056                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1057                 }
1058                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1059                         list_first_entry(
1060                                 &adapter->bss_prio_tbl[priv->bss_priority]
1061                                 .bss_prio_cur->list,
1062                                 struct mwifiex_bss_prio_node,
1063                                 list);
1064                 atomic_dec(&priv->wmm.tx_pkts_queued);
1065                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1066                                        ra_list_flags);
1067         }
1068 }
1069
1070 /*
1071  * This function checks if the first packet in the given RA list
1072  * is already processed or not.
1073  */
1074 static int
1075 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1076                          struct mwifiex_ra_list_tbl *ptr)
1077 {
1078         struct sk_buff *skb;
1079         struct mwifiex_txinfo *tx_info;
1080
1081         if (skb_queue_empty(&ptr->skb_head))
1082                 return false;
1083
1084         skb = skb_peek(&ptr->skb_head);
1085
1086         tx_info = MWIFIEX_SKB_TXCB(skb);
1087         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1088                 return true;
1089
1090         return false;
1091 }
1092
1093 /*
1094  * This function sends a single processed packet to firmware for
1095  * transmission.
1096  */
1097 static void
1098 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1099                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1100                               unsigned long ra_list_flags)
1101                                 __releases(&priv->wmm.ra_list_spinlock)
1102 {
1103         struct mwifiex_tx_param tx_param;
1104         struct mwifiex_adapter *adapter = priv->adapter;
1105         int ret = -1;
1106         struct sk_buff *skb, *skb_next;
1107         struct mwifiex_txinfo *tx_info;
1108
1109         if (skb_queue_empty(&ptr->skb_head)) {
1110                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1111                                        ra_list_flags);
1112                 return;
1113         }
1114
1115         skb = skb_dequeue(&ptr->skb_head);
1116
1117         if (!skb_queue_empty(&ptr->skb_head))
1118                 skb_next = skb_peek(&ptr->skb_head);
1119         else
1120                 skb_next = NULL;
1121
1122         tx_info = MWIFIEX_SKB_TXCB(skb);
1123
1124         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1125         tx_param.next_pkt_len =
1126                 ((skb_next) ? skb_next->len +
1127                  sizeof(struct txpd) : 0);
1128         ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, skb,
1129                                            &tx_param);
1130         switch (ret) {
1131         case -EBUSY:
1132                 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1133                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1134
1135                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1136                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1137                                                ra_list_flags);
1138                         mwifiex_write_data_complete(adapter, skb, -1);
1139                         return;
1140                 }
1141
1142                 skb_queue_tail(&ptr->skb_head, skb);
1143
1144                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1145                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1146                                        ra_list_flags);
1147                 break;
1148         case -1:
1149                 adapter->data_sent = false;
1150                 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1151                 adapter->dbg.num_tx_host_to_card_failure++;
1152                 mwifiex_write_data_complete(adapter, skb, ret);
1153                 break;
1154         case -EINPROGRESS:
1155                 adapter->data_sent = false;
1156         default:
1157                 break;
1158         }
1159         if (ret != -EBUSY) {
1160                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1161                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1162                         priv->wmm.packets_out[ptr_index]++;
1163                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1164                 }
1165                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1166                         list_first_entry(
1167                                 &adapter->bss_prio_tbl[priv->bss_priority]
1168                                 .bss_prio_cur->list,
1169                                 struct mwifiex_bss_prio_node,
1170                                 list);
1171                 atomic_dec(&priv->wmm.tx_pkts_queued);
1172                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1173                                        ra_list_flags);
1174         }
1175 }
1176
1177 /*
1178  * This function dequeues a packet from the highest priority list
1179  * and transmits it.
1180  */
1181 static int
1182 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1183 {
1184         struct mwifiex_ra_list_tbl *ptr;
1185         struct mwifiex_private *priv = NULL;
1186         int ptr_index = 0;
1187         u8 ra[ETH_ALEN];
1188         int tid_del = 0, tid = 0;
1189         unsigned long flags;
1190
1191         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1192         if (!ptr)
1193                 return -1;
1194
1195         tid = mwifiex_get_tid(ptr);
1196
1197         dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1198
1199         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1200         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1201                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1202                 return -1;
1203         }
1204
1205         if (mwifiex_is_ptr_processed(priv, ptr)) {
1206                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1207                 /* ra_list_spinlock has been freed in
1208                    mwifiex_send_processed_packet() */
1209                 return 0;
1210         }
1211
1212         if (!ptr->is_11n_enabled ||
1213             mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
1214             priv->wps.session_enable ||
1215             ((priv->sec_info.wpa_enabled ||
1216               priv->sec_info.wpa2_enabled) &&
1217              !priv->wpa_is_gtk_set)) {
1218                 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1219                 /* ra_list_spinlock has been freed in
1220                    mwifiex_send_single_packet() */
1221         } else {
1222                 if (mwifiex_is_ampdu_allowed(priv, tid)) {
1223                         if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1224                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1225                                                       BA_SETUP_INPROGRESS);
1226                                 mwifiex_send_addba(priv, tid, ptr->ra);
1227                         } else if (mwifiex_find_stream_to_delete
1228                                    (priv, tid, &tid_del, ra)) {
1229                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1230                                                       BA_SETUP_INPROGRESS);
1231                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1232                         }
1233                 }
1234                 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1235                     mwifiex_is_11n_aggragation_possible(priv, ptr,
1236                                                         adapter->tx_buf_size))
1237                         mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1238                                                   ptr_index, flags);
1239                         /* ra_list_spinlock has been freed in
1240                            mwifiex_11n_aggregate_pkt() */
1241                 else
1242                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1243                         /* ra_list_spinlock has been freed in
1244                            mwifiex_send_single_packet() */
1245         }
1246         return 0;
1247 }
1248
1249 /*
1250  * This function transmits the highest priority packet awaiting in the
1251  * WMM Queues.
1252  */
1253 void
1254 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1255 {
1256         do {
1257                 /* Check if busy */
1258                 if (adapter->data_sent || adapter->tx_lock_flag)
1259                         break;
1260
1261                 if (mwifiex_dequeue_tx_packet(adapter))
1262                         break;
1263         } while (!mwifiex_wmm_lists_empty(adapter));
1264 }