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 /* This function returns random no between 16 and 32 to be used as threshold
 131  * for no of packets after which BA setup is initiated.
 132  */
 133 static u8 mwifiex_get_random_ba_threshold(void)
 134 {
 135         u32 sec, usec;
 136         struct timeval ba_tstamp;
 137         u8 ba_threshold;
 138
 139         /* setup ba_packet_threshold here random number between
 140          * [BA_SETUP_PACKET_OFFSET,
 141          * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
 142          */
 143
 144         do_gettimeofday(&ba_tstamp);
 145         sec = (ba_tstamp.tv_sec & 0xFFFF) + (ba_tstamp.tv_sec >> 16);
 146         usec = (ba_tstamp.tv_usec & 0xFFFF) + (ba_tstamp.tv_usec >> 16);
 147         ba_threshold = (((sec << 16) + usec) % BA_SETUP_MAX_PACKET_THRESHOLD)
 148                                                       + BA_SETUP_PACKET_OFFSET;
 149
 150         return ba_threshold;
 151 }
 152
 153 /*
 154  * This function allocates and adds a RA list for all TIDs
 155  * with the given RA.
 156  */
 157 void
 158 mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
 159 {
 160         int i;
 161         struct mwifiex_ra_list_tbl *ra_list;
 162         struct mwifiex_adapter *adapter = priv->adapter;
 163         struct mwifiex_sta_node *node;
 164         unsigned long flags;
 165
 166         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 167         node = mwifiex_get_sta_entry(priv, ra);
 168         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 169
 170         for (i = 0; i < MAX_NUM_TID; ++i) {
 171                 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
 172                 dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);
 173
 174                 if (!ra_list)
 175                         break;
 176
 177                 ra_list->is_11n_enabled = 0;
 178                 if (!mwifiex_queuing_ra_based(priv)) {
 179                         ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
 180                 } else {
 181                         ra_list->is_11n_enabled =
 182                                       mwifiex_is_sta_11n_enabled(priv, node);
 183                         if (ra_list->is_11n_enabled)
 184                                 ra_list->max_amsdu = node->max_amsdu;
 185                 }
 186
 187                 dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
 188                         ra_list, ra_list->is_11n_enabled);
 189
 190                 if (ra_list->is_11n_enabled) {
 191                         ra_list->pkt_count = 0;
 192                         ra_list->ba_packet_thr =
 193                                               mwifiex_get_random_ba_threshold();
 194                 }
 195                 list_add_tail(&ra_list->list,
 196                               &priv->wmm.tid_tbl_ptr[i].ra_list);
 197
 198                 if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
 199                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
 200         }
 201 }
 202
 203 /*
 204  * This function sets the WMM queue priorities to their default values.
 205  */
 206 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
 207 {
 208         /* Default queue priorities: VO->VI->BE->BK */
 209         priv->wmm.queue_priority[0] = WMM_AC_VO;
 210         priv->wmm.queue_priority[1] = WMM_AC_VI;
 211         priv->wmm.queue_priority[2] = WMM_AC_BE;
 212         priv->wmm.queue_priority[3] = WMM_AC_BK;
 213 }
 214
 215 /*
 216  * This function map ACs to TIDs.
 217  */
 218 static void
 219 mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
 220 {
 221         u8 *queue_priority = wmm->queue_priority;
 222         int i;
 223
 224         for (i = 0; i < 4; ++i) {
 225                 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
 226                 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
 227         }
 228
 229         for (i = 0; i < MAX_NUM_TID; ++i)
 230                 tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
 231
 232         atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
 233 }
 234
 235 /*
 236  * This function initializes WMM priority queues.
 237  */
 238 void
 239 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
 240                                    struct ieee_types_wmm_parameter *wmm_ie)
 241 {
 242         u16 cw_min, avg_back_off, tmp[4];
 243         u32 i, j, num_ac;
 244         u8 ac_idx;
 245
 246         if (!wmm_ie || !priv->wmm_enabled) {
 247                 /* WMM is not enabled, just set the defaults and return */
 248                 mwifiex_wmm_default_queue_priorities(priv);
 249                 return;
 250         }
 251
 252         dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
 253                 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
 254                 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
 255                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
 256                 wmm_ie->reserved);
 257
 258         for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
 259                 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
 260                 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
 261                 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
 262                 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
 263
 264                 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
 265                 priv->wmm.queue_priority[ac_idx] = ac_idx;
 266                 tmp[ac_idx] = avg_back_off;
 267
 268                 dev_dbg(priv->adapter->dev,
 269                         "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
 270                         (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
 271                         cw_min, avg_back_off);
 272                 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
 273         }
 274
 275         /* Bubble sort */
 276         for (i = 0; i < num_ac; i++) {
 277                 for (j = 1; j < num_ac - i; j++) {
 278                         if (tmp[j - 1] > tmp[j]) {
 279                                 swap(tmp[j - 1], tmp[j]);
 280                                 swap(priv->wmm.queue_priority[j - 1],
 281                                      priv->wmm.queue_priority[j]);
 282                         } else if (tmp[j - 1] == tmp[j]) {
 283                                 if (priv->wmm.queue_priority[j - 1]
 284                                     < priv->wmm.queue_priority[j])
 285                                         swap(priv->wmm.queue_priority[j - 1],
 286                                              priv->wmm.queue_priority[j]);
 287                         }
 288                 }
 289         }
 290
 291         mwifiex_wmm_queue_priorities_tid(&priv->wmm);
 292 }
 293
 294 /*
 295  * This function evaluates whether or not an AC is to be downgraded.
 296  *
 297  * In case the AC is not enabled, the highest AC is returned that is
 298  * enabled and does not require admission control.
 299  */
 300 static enum mwifiex_wmm_ac_e
 301 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
 302                               enum mwifiex_wmm_ac_e eval_ac)
 303 {
 304         int down_ac;
 305         enum mwifiex_wmm_ac_e ret_ac;
 306         struct mwifiex_wmm_ac_status *ac_status;
 307
 308         ac_status = &priv->wmm.ac_status[eval_ac];
 309
 310         if (!ac_status->disabled)
 311                 /* Okay to use this AC, its enabled */
 312                 return eval_ac;
 313
 314         /* Setup a default return value of the lowest priority */
 315         ret_ac = WMM_AC_BK;
 316
 317         /*
 318          *  Find the highest AC that is enabled and does not require
 319          *  admission control. The spec disallows downgrading to an AC,
 320          *  which is enabled due to a completed admission control.
 321          *  Unadmitted traffic is not to be sent on an AC with admitted
 322          *  traffic.
 323          */
 324         for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
 325                 ac_status = &priv->wmm.ac_status[down_ac];
 326
 327                 if (!ac_status->disabled && !ac_status->flow_required)
 328                         /* AC is enabled and does not require admission
 329                            control */
 330                         ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
 331         }
 332
 333         return ret_ac;
 334 }
 335
 336 /*
 337  * This function downgrades WMM priority queue.
 338  */
 339 void
 340 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
 341 {
 342         int ac_val;
 343
 344         dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
 345                         "BK(0), BE(1), VI(2), VO(3)\n");
 346
 347         if (!priv->wmm_enabled) {
 348                 /* WMM is not enabled, default priorities */
 349                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
 350                         priv->wmm.ac_down_graded_vals[ac_val] =
 351                                                 (enum mwifiex_wmm_ac_e) ac_val;
 352         } else {
 353                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
 354                         priv->wmm.ac_down_graded_vals[ac_val]
 355                                 = mwifiex_wmm_eval_downgrade_ac(priv,
 356                                                 (enum mwifiex_wmm_ac_e) ac_val);
 357                         dev_dbg(priv->adapter->dev,
 358                                 "info: WMM: AC PRIO %d maps to %d\n",
 359                                 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
 360                 }
 361         }
 362 }
 363
 364 /*
 365  * This function converts the IP TOS field to an WMM AC
 366  * Queue assignment.
 367  */
 368 static enum mwifiex_wmm_ac_e
 369 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
 370 {
 371         /* Map of TOS UP values to WMM AC */
 372         const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
 373                 WMM_AC_BK,
 374                 WMM_AC_BK,
 375                 WMM_AC_BE,
 376                 WMM_AC_VI,
 377                 WMM_AC_VI,
 378                 WMM_AC_VO,
 379                 WMM_AC_VO
 380         };
 381
 382         if (tos >= ARRAY_SIZE(tos_to_ac))
 383                 return WMM_AC_BE;
 384
 385         return tos_to_ac[tos];
 386 }
 387
 388 /*
 389  * This function evaluates a given TID and downgrades it to a lower
 390  * TID if the WMM Parameter IE received from the AP indicates that the
 391  * AP is disabled (due to call admission control (ACM bit). Mapping
 392  * of TID to AC is taken care of internally.
 393  */
 394 static u8
 395 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
 396 {
 397         enum mwifiex_wmm_ac_e ac, ac_down;
 398         u8 new_tid;
 399
 400         ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
 401         ac_down = priv->wmm.ac_down_graded_vals[ac];
 402
 403         /* Send the index to tid array, picking from the array will be
 404          * taken care by dequeuing function
 405          */
 406         new_tid = ac_to_tid[ac_down][tid % 2];
 407
 408         return new_tid;
 409 }
 410
 411 /*
 412  * This function initializes the WMM state information and the
 413  * WMM data path queues.
 414  */
 415 void
 416 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
 417 {
 418         int i, j;
 419         struct mwifiex_private *priv;
 420
 421         for (j = 0; j < adapter->priv_num; ++j) {
 422                 priv = adapter->priv[j];
 423                 if (!priv)
 424                         continue;
 425
 426                 for (i = 0; i < MAX_NUM_TID; ++i) {
 427                         priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
 428                         priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
 429                         priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
 430                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 431                 }
 432
 433                 priv->aggr_prio_tbl[6].amsdu
 434                                         = priv->aggr_prio_tbl[6].ampdu_ap
 435                                         = priv->aggr_prio_tbl[6].ampdu_user
 436                                         = BA_STREAM_NOT_ALLOWED;
 437
 438                 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
 439                                         = priv->aggr_prio_tbl[7].ampdu_user
 440                                         = BA_STREAM_NOT_ALLOWED;
 441
 442                 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
 443                 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
 444                 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
 445
 446                 mwifiex_reset_11n_rx_seq_num(priv);
 447
 448                 atomic_set(&priv->wmm.tx_pkts_queued, 0);
 449                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 450         }
 451 }
 452
 453 /*
 454  * This function checks if WMM Tx queue is empty.
 455  */
 456 int
 457 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
 458 {
 459         int i;
 460         struct mwifiex_private *priv;
 461
 462         for (i = 0; i < adapter->priv_num; ++i) {
 463                 priv = adapter->priv[i];
 464                 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
 465                         return false;
 466         }
 467
 468         return true;
 469 }
 470
 471 /*
 472  * This function deletes all packets in an RA list node.
 473  *
 474  * The packet sent completion callback handler are called with
 475  * status failure, after they are dequeued to ensure proper
 476  * cleanup. The RA list node itself is freed at the end.
 477  */
 478 static void
 479 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
 480                                     struct mwifiex_ra_list_tbl *ra_list)
 481 {
 482         struct mwifiex_adapter *adapter = priv->adapter;
 483         struct sk_buff *skb, *tmp;
 484
 485         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
 486                 mwifiex_write_data_complete(adapter, skb, -1);
 487 }
 488
 489 /*
 490  * This function deletes all packets in an RA list.
 491  *
 492  * Each nodes in the RA list are freed individually first, and then
 493  * the RA list itself is freed.
 494  */
 495 static void
 496 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
 497                                struct list_head *ra_list_head)
 498 {
 499         struct mwifiex_ra_list_tbl *ra_list;
 500
 501         list_for_each_entry(ra_list, ra_list_head, list)
 502                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 503 }
 504
 505 /*
 506  * This function deletes all packets in all RA lists.
 507  */
 508 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
 509 {
 510         int i;
 511
 512         for (i = 0; i < MAX_NUM_TID; i++)
 513                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
 514                                                                        ra_list);
 515
 516         atomic_set(&priv->wmm.tx_pkts_queued, 0);
 517         atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 518 }
 519
 520 /*
 521  * This function deletes all route addresses from all RA lists.
 522  */
 523 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 524 {
 525         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
 526         int i;
 527
 528         for (i = 0; i < MAX_NUM_TID; ++i) {
 529                 dev_dbg(priv->adapter->dev,
 530                         "info: ra_list: freeing buf for tid %d\n", i);
 531                 list_for_each_entry_safe(ra_list, tmp_node,
 532                                          &priv->wmm.tid_tbl_ptr[i].ra_list,
 533                                          list) {
 534                         list_del(&ra_list->list);
 535                         kfree(ra_list);
 536                 }
 537
 538                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
 539
 540                 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 541         }
 542 }
 543
 544 /*
 545  * This function cleans up the Tx and Rx queues.
 546  *
 547  * Cleanup includes -
 548  *      - All packets in RA lists
 549  *      - All entries in Rx reorder table
 550  *      - All entries in Tx BA stream table
 551  *      - MPA buffer (if required)
 552  *      - All RA lists
 553  */
 554 void
 555 mwifiex_clean_txrx(struct mwifiex_private *priv)
 556 {
 557         unsigned long flags;
 558
 559         mwifiex_11n_cleanup_reorder_tbl(priv);
 560         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 561
 562         mwifiex_wmm_cleanup_queues(priv);
 563         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
 564
 565         if (priv->adapter->if_ops.cleanup_mpa_buf)
 566                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
 567
 568         mwifiex_wmm_delete_all_ralist(priv);
 569         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 570
 571         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 572 }
 573
 574 /*
 575  * This function retrieves a particular RA list node, matching with the
 576  * given TID and RA address.
 577  */
 578 static struct mwifiex_ra_list_tbl *
 579 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
 580                             u8 *ra_addr)
 581 {
 582         struct mwifiex_ra_list_tbl *ra_list;
 583
 584         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
 585                             list) {
 586                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
 587                         return ra_list;
 588         }
 589
 590         return NULL;
 591 }
 592
 593 /*
 594  * This function retrieves an RA list node for a given TID and
 595  * RA address pair.
 596  *
 597  * If no such node is found, a new node is added first and then
 598  * retrieved.
 599  */
 600 static struct mwifiex_ra_list_tbl *
 601 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
 602 {
 603         struct mwifiex_ra_list_tbl *ra_list;
 604
 605         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 606         if (ra_list)
 607                 return ra_list;
 608         mwifiex_ralist_add(priv, ra_addr);
 609
 610         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 611 }
 612
 613 /*
 614  * This function checks if a particular RA list node exists in a given TID
 615  * table index.
 616  */
 617 int
 618 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
 619                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
 620 {
 621         struct mwifiex_ra_list_tbl *rlist;
 622
 623         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
 624                             list) {
 625                 if (rlist == ra_list)
 626                         return true;
 627         }
 628
 629         return false;
 630 }
 631
 632 /*
 633  * This function adds a packet to WMM queue.
 634  *
 635  * In disconnected state the packet is immediately dropped and the
 636  * packet send completion callback is called with status failure.
 637  *
 638  * Otherwise, the correct RA list node is located and the packet
 639  * is queued at the list tail.
 640  */
 641 void
 642 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
 643                             struct sk_buff *skb)
 644 {
 645         struct mwifiex_adapter *adapter = priv->adapter;
 646         u32 tid;
 647         struct mwifiex_ra_list_tbl *ra_list;
 648         u8 ra[ETH_ALEN], tid_down;
 649         unsigned long flags;
 650
 651         if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
 652                 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
 653                 mwifiex_write_data_complete(adapter, skb, -1);
 654                 return;
 655         }
 656
 657         tid = skb->priority;
 658
 659         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 660
 661         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 662
 663         /* In case of infra as we have already created the list during
 664            association we just don't have to call get_queue_raptr, we will
 665            have only 1 raptr for a tid in case of infra */
 666         if (!mwifiex_queuing_ra_based(priv) &&
 667             !mwifiex_is_skb_mgmt_frame(skb)) {
 668                 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
 669                         ra_list = list_first_entry(
 670                                 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
 671                                 struct mwifiex_ra_list_tbl, list);
 672                 else
 673                         ra_list = NULL;
 674         } else {
 675                 memcpy(ra, skb->data, ETH_ALEN);
 676                 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
 677                         memset(ra, 0xff, ETH_ALEN);
 678                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
 679         }
 680
 681         if (!ra_list) {
 682                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 683                 mwifiex_write_data_complete(adapter, skb, -1);
 684                 return;
 685         }
 686
 687         skb_queue_tail(&ra_list->skb_head, skb);
 688
 689         ra_list->total_pkts_size += skb->len;
 690         ra_list->pkt_count++;
 691
 692         atomic_inc(&priv->wmm.tx_pkts_queued);
 693
 694         if (atomic_read(&priv->wmm.highest_queued_prio) <
 695                                                 tos_to_tid_inv[tid_down])
 696                 atomic_set(&priv->wmm.highest_queued_prio,
 697                            tos_to_tid_inv[tid_down]);
 698
 699         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 700 }
 701
 702 /*
 703  * This function processes the get WMM status command response from firmware.
 704  *
 705  * The response may contain multiple TLVs -
 706  *      - AC Queue status TLVs
 707  *      - Current WMM Parameter IE TLV
 708  *      - Admission Control action frame TLVs
 709  *
 710  * This function parses the TLVs and then calls further specific functions
 711  * to process any changes in the queue prioritize or state.
 712  */
 713 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
 714                                const struct host_cmd_ds_command *resp)
 715 {
 716         u8 *curr = (u8 *) &resp->params.get_wmm_status;
 717         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
 718         int valid = true;
 719
 720         struct mwifiex_ie_types_data *tlv_hdr;
 721         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
 722         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
 723         struct mwifiex_wmm_ac_status *ac_status;
 724
 725         dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
 726                 resp_len);
 727
 728         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
 729                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
 730                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
 731
 732                 switch (le16_to_cpu(tlv_hdr->header.type)) {
 733                 case TLV_TYPE_WMMQSTATUS:
 734                         tlv_wmm_qstatus =
 735                                 (struct mwifiex_ie_types_wmm_queue_status *)
 736                                 tlv_hdr;
 737                         dev_dbg(priv->adapter->dev,
 738                                 "info: CMD_RESP: WMM_GET_STATUS:"
 739                                 " QSTATUS TLV: %d, %d, %d\n",
 740                                 tlv_wmm_qstatus->queue_index,
 741                                 tlv_wmm_qstatus->flow_required,
 742                                 tlv_wmm_qstatus->disabled);
 743
 744                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
 745                                                          queue_index];
 746                         ac_status->disabled = tlv_wmm_qstatus->disabled;
 747                         ac_status->flow_required =
 748                                                 tlv_wmm_qstatus->flow_required;
 749                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
 750                         break;
 751
 752                 case WLAN_EID_VENDOR_SPECIFIC:
 753                         /*
 754                          * Point the regular IEEE IE 2 bytes into the Marvell IE
 755                          *   and setup the IEEE IE type and length byte fields
 756                          */
 757
 758                         wmm_param_ie =
 759                                 (struct ieee_types_wmm_parameter *) (curr +
 760                                                                     2);
 761                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
 762                         wmm_param_ie->vend_hdr.element_id =
 763                                                 WLAN_EID_VENDOR_SPECIFIC;
 764
 765                         dev_dbg(priv->adapter->dev,
 766                                 "info: CMD_RESP: WMM_GET_STATUS:"
 767                                 " WMM Parameter Set Count: %d\n",
 768                                 wmm_param_ie->qos_info_bitmap &
 769                                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
 770
 771                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
 772                                wmm_ie, wmm_param_ie,
 773                                wmm_param_ie->vend_hdr.len + 2);
 774
 775                         break;
 776
 777                 default:
 778                         valid = false;
 779                         break;
 780                 }
 781
 782                 curr += (tlv_len + sizeof(tlv_hdr->header));
 783                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
 784         }
 785
 786         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
 787         mwifiex_wmm_setup_ac_downgrade(priv);
 788
 789         return 0;
 790 }
 791
 792 /*
 793  * Callback handler from the command module to allow insertion of a WMM TLV.
 794  *
 795  * If the BSS we are associating to supports WMM, this function adds the
 796  * required WMM Information IE to the association request command buffer in
 797  * the form of a Marvell extended IEEE IE.
 798  */
 799 u32
 800 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
 801                                     u8 **assoc_buf,
 802                                     struct ieee_types_wmm_parameter *wmm_ie,
 803                                     struct ieee80211_ht_cap *ht_cap)
 804 {
 805         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
 806         u32 ret_len = 0;
 807
 808         /* Null checks */
 809         if (!assoc_buf)
 810                 return 0;
 811         if (!(*assoc_buf))
 812                 return 0;
 813
 814         if (!wmm_ie)
 815                 return 0;
 816
 817         dev_dbg(priv->adapter->dev,
 818                 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
 819                 wmm_ie->vend_hdr.element_id);
 820
 821         if ((priv->wmm_required ||
 822              (ht_cap && (priv->adapter->config_bands & BAND_GN ||
 823              priv->adapter->config_bands & BAND_AN))) &&
 824             wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
 825                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
 826                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
 827                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
 828                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
 829                        le16_to_cpu(wmm_tlv->header.len));
 830                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
 831                         memcpy((u8 *) (wmm_tlv->wmm_ie
 832                                        + le16_to_cpu(wmm_tlv->header.len)
 833                                        - sizeof(priv->wmm_qosinfo)),
 834                                &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
 835
 836                 ret_len = sizeof(wmm_tlv->header)
 837                           + le16_to_cpu(wmm_tlv->header.len);
 838
 839                 *assoc_buf += ret_len;
 840         }
 841
 842         return ret_len;
 843 }
 844
 845 /*
 846  * This function computes the time delay in the driver queues for a
 847  * given packet.
 848  *
 849  * When the packet is received at the OS/Driver interface, the current
 850  * time is set in the packet structure. The difference between the present
 851  * time and that received time is computed in this function and limited
 852  * based on pre-compiled limits in the driver.
 853  */
 854 u8
 855 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
 856                                   const struct sk_buff *skb)
 857 {
 858         u8 ret_val;
 859         struct timeval out_tstamp, in_tstamp;
 860         u32 queue_delay;
 861
 862         do_gettimeofday(&out_tstamp);
 863         in_tstamp = ktime_to_timeval(skb->tstamp);
 864
 865         queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
 866         queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
 867
 868         /*
 869          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
 870          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
 871          *
 872          * Pass max value if queue_delay is beyond the uint8 range
 873          */
 874         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
 875
 876         dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
 877                                 " %d ms sent to FW\n", queue_delay, ret_val);
 878
 879         return ret_val;
 880 }
 881
 882 /*
 883  * This function retrieves the highest priority RA list table pointer.
 884  */
 885 static struct mwifiex_ra_list_tbl *
 886 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 887                                      struct mwifiex_private **priv, int *tid)
 888 {
 889         struct mwifiex_private *priv_tmp;
 890         struct mwifiex_ra_list_tbl *ptr, *head;
 891         struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
 892         struct mwifiex_tid_tbl *tid_ptr;
 893         atomic_t *hqp;
 894         int is_list_empty;
 895         unsigned long flags;
 896         int i, j;
 897
 898         for (j = adapter->priv_num - 1; j >= 0; --j) {
 899                 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
 900                                   flags);
 901                 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
 902                                            .bss_prio_head);
 903                 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
 904                                        flags);
 905                 if (is_list_empty)
 906                         continue;
 907
 908                 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
 909                     (struct mwifiex_bss_prio_node *)
 910                     &adapter->bss_prio_tbl[j].bss_prio_head) {
 911                         adapter->bss_prio_tbl[j].bss_prio_cur =
 912                                 list_first_entry(&adapter->bss_prio_tbl[j]
 913                                                  .bss_prio_head,
 914                                                  struct mwifiex_bss_prio_node,
 915                                                  list);
 916                 }
 917
 918                 bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
 919                 bssprio_head = bssprio_node;
 920
 921                 do {
 922                         priv_tmp = bssprio_node->priv;
 923                         hqp = &priv_tmp->wmm.highest_queued_prio;
 924
 925                         for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
 926
 927                                 tid_ptr = &(priv_tmp)->wmm.
 928                                         tid_tbl_ptr[tos_to_tid[i]];
 929
 930                                 /* For non-STA ra_list_curr may be NULL */
 931                                 if (!tid_ptr->ra_list_curr)
 932                                         continue;
 933
 934                                 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
 935                                                   flags);
 936                                 is_list_empty =
 937                                         list_empty(&adapter->bss_prio_tbl[j]
 938                                                    .bss_prio_head);
 939                                 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
 940                                                        flags);
 941                                 if (is_list_empty)
 942                                         continue;
 943
 944                                 /*
 945                                  * Always choose the next ra we transmitted
 946                                  * last time, this way we pick the ra's in
 947                                  * round robin fashion.
 948                                  */
 949                                 ptr = list_first_entry(
 950                                                 &tid_ptr->ra_list_curr->list,
 951                                                 struct mwifiex_ra_list_tbl,
 952                                                 list);
 953
 954                                 head = ptr;
 955                                 if (ptr == (struct mwifiex_ra_list_tbl *)
 956                                                 &tid_ptr->ra_list) {
 957                                         /* Get next ra */
 958                                         ptr = list_first_entry(&ptr->list,
 959                                             struct mwifiex_ra_list_tbl, list);
 960                                         head = ptr;
 961                                 }
 962
 963                                 do {
 964                                         is_list_empty =
 965                                                 skb_queue_empty(&ptr->skb_head);
 966
 967                                         if (!is_list_empty)
 968                                                 goto found;
 969
 970                                         /* Get next ra */
 971                                         ptr = list_first_entry(&ptr->list,
 972                                                  struct mwifiex_ra_list_tbl,
 973                                                  list);
 974                                         if (ptr ==
 975                                             (struct mwifiex_ra_list_tbl *)
 976                                             &tid_ptr->ra_list)
 977                                                 ptr = list_first_entry(
 978                                                     &ptr->list,
 979                                                     struct mwifiex_ra_list_tbl,
 980                                                     list);
 981                                 } while (ptr != head);
 982                         }
 983
 984                         /* No packet at any TID for this priv. Mark as such
 985                          * to skip checking TIDs for this priv (until pkt is
 986                          * added).
 987                          */
 988                         atomic_set(hqp, NO_PKT_PRIO_TID);
 989
 990                         /* Get next bss priority node */
 991                         bssprio_node = list_first_entry(&bssprio_node->list,
 992                                                 struct mwifiex_bss_prio_node,
 993                                                 list);
 994
 995                         if (bssprio_node ==
 996                             (struct mwifiex_bss_prio_node *)
 997                             &adapter->bss_prio_tbl[j].bss_prio_head)
 998                                 /* Get next bss priority node */
 999                                 bssprio_node = list_first_entry(
1000                                                 &bssprio_node->list,
1001                                                 struct mwifiex_bss_prio_node,
1002                                                 list);
1003                 } while (bssprio_node != bssprio_head);
1004         }
1005         return NULL;
1006
1007 found:
1008         spin_lock_irqsave(&priv_tmp->wmm.ra_list_spinlock, flags);
1009         if (atomic_read(hqp) > i)
1010                 atomic_set(hqp, i);
1011         spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags);
1012
1013         *priv = priv_tmp;
1014         *tid = tos_to_tid[i];
1015
1016         return ptr;
1017 }
1018
1019 /*
1020  * This function checks if 11n aggregation is possible.
1021  */
1022 static int
1023 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
1024                                     struct mwifiex_ra_list_tbl *ptr,
1025                                     int max_buf_size)
1026 {
1027         int count = 0, total_size = 0;
1028         struct sk_buff *skb, *tmp;
1029         int max_amsdu_size;
1030
1031         if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled &&
1032             ptr->is_11n_enabled)
1033                 max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
1034         else
1035                 max_amsdu_size = max_buf_size;
1036
1037         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
1038                 total_size += skb->len;
1039                 if (total_size >= max_amsdu_size)
1040                         break;
1041                 if (++count >= MIN_NUM_AMSDU)
1042                         return true;
1043         }
1044
1045         return false;
1046 }
1047
1048 /*
1049  * This function sends a single packet to firmware for transmission.
1050  */
1051 static void
1052 mwifiex_send_single_packet(struct mwifiex_private *priv,
1053                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1054                            unsigned long ra_list_flags)
1055                            __releases(&priv->wmm.ra_list_spinlock)
1056 {
1057         struct sk_buff *skb, *skb_next;
1058         struct mwifiex_tx_param tx_param;
1059         struct mwifiex_adapter *adapter = priv->adapter;
1060         struct mwifiex_txinfo *tx_info;
1061
1062         if (skb_queue_empty(&ptr->skb_head)) {
1063                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1064                                        ra_list_flags);
1065                 dev_dbg(adapter->dev, "data: nothing to send\n");
1066                 return;
1067         }
1068
1069         skb = skb_dequeue(&ptr->skb_head);
1070
1071         tx_info = MWIFIEX_SKB_TXCB(skb);
1072         dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1073
1074         ptr->total_pkts_size -= skb->len;
1075
1076         if (!skb_queue_empty(&ptr->skb_head))
1077                 skb_next = skb_peek(&ptr->skb_head);
1078         else
1079                 skb_next = NULL;
1080
1081         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1082
1083         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1084                                 sizeof(struct txpd) : 0);
1085
1086         if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1087                 /* Queue the packet back at the head */
1088                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1089
1090                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1091                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1092                                                ra_list_flags);
1093                         mwifiex_write_data_complete(adapter, skb, -1);
1094                         return;
1095                 }
1096
1097                 skb_queue_tail(&ptr->skb_head, skb);
1098
1099                 ptr->total_pkts_size += skb->len;
1100                 ptr->pkt_count++;
1101                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1102                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1103                                        ra_list_flags);
1104         } else {
1105                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1106                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1107                         priv->wmm.packets_out[ptr_index]++;
1108                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1109                 }
1110                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1111                         list_first_entry(
1112                                 &adapter->bss_prio_tbl[priv->bss_priority]
1113                                 .bss_prio_cur->list,
1114                                 struct mwifiex_bss_prio_node,
1115                                 list);
1116                 atomic_dec(&priv->wmm.tx_pkts_queued);
1117                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1118                                        ra_list_flags);
1119         }
1120 }
1121
1122 /*
1123  * This function checks if the first packet in the given RA list
1124  * is already processed or not.
1125  */
1126 static int
1127 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1128                          struct mwifiex_ra_list_tbl *ptr)
1129 {
1130         struct sk_buff *skb;
1131         struct mwifiex_txinfo *tx_info;
1132
1133         if (skb_queue_empty(&ptr->skb_head))
1134                 return false;
1135
1136         skb = skb_peek(&ptr->skb_head);
1137
1138         tx_info = MWIFIEX_SKB_TXCB(skb);
1139         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1140                 return true;
1141
1142         return false;
1143 }
1144
1145 /*
1146  * This function sends a single processed packet to firmware for
1147  * transmission.
1148  */
1149 static void
1150 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1151                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1152                               unsigned long ra_list_flags)
1153                                 __releases(&priv->wmm.ra_list_spinlock)
1154 {
1155         struct mwifiex_tx_param tx_param;
1156         struct mwifiex_adapter *adapter = priv->adapter;
1157         int ret = -1;
1158         struct sk_buff *skb, *skb_next;
1159         struct mwifiex_txinfo *tx_info;
1160
1161         if (skb_queue_empty(&ptr->skb_head)) {
1162                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1163                                        ra_list_flags);
1164                 return;
1165         }
1166
1167         skb = skb_dequeue(&ptr->skb_head);
1168
1169         if (!skb_queue_empty(&ptr->skb_head))
1170                 skb_next = skb_peek(&ptr->skb_head);
1171         else
1172                 skb_next = NULL;
1173
1174         tx_info = MWIFIEX_SKB_TXCB(skb);
1175
1176         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1177
1178         if (adapter->iface_type == MWIFIEX_USB) {
1179                 adapter->data_sent = true;
1180                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
1181                                                    skb, NULL);
1182         } else {
1183                 tx_param.next_pkt_len =
1184                         ((skb_next) ? skb_next->len +
1185                          sizeof(struct txpd) : 0);
1186                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1187                                                    skb, &tx_param);
1188         }
1189
1190         switch (ret) {
1191         case -EBUSY:
1192                 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1193                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1194
1195                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1196                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1197                                                ra_list_flags);
1198                         mwifiex_write_data_complete(adapter, skb, -1);
1199                         return;
1200                 }
1201
1202                 skb_queue_tail(&ptr->skb_head, skb);
1203
1204                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1205                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1206                                        ra_list_flags);
1207                 break;
1208         case -1:
1209                 adapter->data_sent = false;
1210                 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1211                 adapter->dbg.num_tx_host_to_card_failure++;
1212                 mwifiex_write_data_complete(adapter, skb, ret);
1213                 break;
1214         case -EINPROGRESS:
1215                 adapter->data_sent = false;
1216         default:
1217                 break;
1218         }
1219         if (ret != -EBUSY) {
1220                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1221                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1222                         priv->wmm.packets_out[ptr_index]++;
1223                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1224                 }
1225                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1226                         list_first_entry(
1227                                 &adapter->bss_prio_tbl[priv->bss_priority]
1228                                 .bss_prio_cur->list,
1229                                 struct mwifiex_bss_prio_node,
1230                                 list);
1231                 atomic_dec(&priv->wmm.tx_pkts_queued);
1232                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1233                                        ra_list_flags);
1234         }
1235 }
1236
1237 /*
1238  * This function dequeues a packet from the highest priority list
1239  * and transmits it.
1240  */
1241 static int
1242 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1243 {
1244         struct mwifiex_ra_list_tbl *ptr;
1245         struct mwifiex_private *priv = NULL;
1246         int ptr_index = 0;
1247         u8 ra[ETH_ALEN];
1248         int tid_del = 0, tid = 0;
1249         unsigned long flags;
1250
1251         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1252         if (!ptr)
1253                 return -1;
1254
1255         tid = mwifiex_get_tid(ptr);
1256
1257         dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1258
1259         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1260         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1261                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1262                 return -1;
1263         }
1264
1265         if (mwifiex_is_ptr_processed(priv, ptr)) {
1266                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1267                 /* ra_list_spinlock has been freed in
1268                    mwifiex_send_processed_packet() */
1269                 return 0;
1270         }
1271
1272         if (!ptr->is_11n_enabled ||
1273             mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
1274             priv->wps.session_enable ||
1275             ((priv->sec_info.wpa_enabled ||
1276               priv->sec_info.wpa2_enabled) &&
1277              !priv->wpa_is_gtk_set)) {
1278                 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1279                 /* ra_list_spinlock has been freed in
1280                    mwifiex_send_single_packet() */
1281         } else {
1282                 if (mwifiex_is_ampdu_allowed(priv, tid) &&
1283                     ptr->pkt_count > ptr->ba_packet_thr) {
1284                         if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1285                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1286                                                       BA_SETUP_INPROGRESS);
1287                                 mwifiex_send_addba(priv, tid, ptr->ra);
1288                         } else if (mwifiex_find_stream_to_delete
1289                                    (priv, tid, &tid_del, ra)) {
1290                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1291                                                       BA_SETUP_INPROGRESS);
1292                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1293                         }
1294                 }
1295                 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1296                     mwifiex_is_11n_aggragation_possible(priv, ptr,
1297                                                         adapter->tx_buf_size))
1298                         mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1299                                                   ptr_index, flags);
1300                         /* ra_list_spinlock has been freed in
1301                            mwifiex_11n_aggregate_pkt() */
1302                 else
1303                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1304                         /* ra_list_spinlock has been freed in
1305                            mwifiex_send_single_packet() */
1306         }
1307         return 0;
1308 }
1309
1310 /*
1311  * This function transmits the highest priority packet awaiting in the
1312  * WMM Queues.
1313  */
1314 void
1315 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1316 {
1317         do {
1318                 /* Check if busy */
1319                 if (adapter->data_sent || adapter->tx_lock_flag)
1320                         break;
1321
1322                 if (mwifiex_dequeue_tx_packet(adapter))
1323                         break;
1324         } while (!mwifiex_wmm_lists_empty(adapter));
1325 }