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                 atomic_set(&priv->wmm.tx_pkts_queued, 0);
 408                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 409         }
 410 }
 411
 412 /*
 413  * This function checks if WMM Tx queue is empty.
 414  */
 415 int
 416 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
 417 {
 418         int i;
 419         struct mwifiex_private *priv;
 420
 421         for (i = 0; i < adapter->priv_num; ++i) {
 422                 priv = adapter->priv[i];
 423                 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
 424                                 return false;
 425         }
 426
 427         return true;
 428 }
 429
 430 /*
 431  * This function deletes all packets in an RA list node.
 432  *
 433  * The packet sent completion callback handler are called with
 434  * status failure, after they are dequeued to ensure proper
 435  * cleanup. The RA list node itself is freed at the end.
 436  */
 437 static void
 438 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
 439                                     struct mwifiex_ra_list_tbl *ra_list)
 440 {
 441         struct mwifiex_adapter *adapter = priv->adapter;
 442         struct sk_buff *skb, *tmp;
 443
 444         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
 445                 mwifiex_write_data_complete(adapter, skb, -1);
 446 }
 447
 448 /*
 449  * This function deletes all packets in an RA list.
 450  *
 451  * Each nodes in the RA list are freed individually first, and then
 452  * the RA list itself is freed.
 453  */
 454 static void
 455 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
 456                                struct list_head *ra_list_head)
 457 {
 458         struct mwifiex_ra_list_tbl *ra_list;
 459
 460         list_for_each_entry(ra_list, ra_list_head, list)
 461                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 462 }
 463
 464 /*
 465  * This function deletes all packets in all RA lists.
 466  */
 467 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
 468 {
 469         int i;
 470
 471         for (i = 0; i < MAX_NUM_TID; i++)
 472                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
 473                                                                        ra_list);
 474
 475         atomic_set(&priv->wmm.tx_pkts_queued, 0);
 476         atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 477 }
 478
 479 /*
 480  * This function deletes all route addresses from all RA lists.
 481  */
 482 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 483 {
 484         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
 485         int i;
 486
 487         for (i = 0; i < MAX_NUM_TID; ++i) {
 488                 dev_dbg(priv->adapter->dev,
 489                         "info: ra_list: freeing buf for tid %d\n", i);
 490                 list_for_each_entry_safe(ra_list, tmp_node,
 491                                          &priv->wmm.tid_tbl_ptr[i].ra_list,
 492                                          list) {
 493                         list_del(&ra_list->list);
 494                         kfree(ra_list);
 495                 }
 496
 497                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
 498
 499                 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 500         }
 501 }
 502
 503 /*
 504  * This function cleans up the Tx and Rx queues.
 505  *
 506  * Cleanup includes -
 507  *      - All packets in RA lists
 508  *      - All entries in Rx reorder table
 509  *      - All entries in Tx BA stream table
 510  *      - MPA buffer (if required)
 511  *      - All RA lists
 512  */
 513 void
 514 mwifiex_clean_txrx(struct mwifiex_private *priv)
 515 {
 516         unsigned long flags;
 517
 518         mwifiex_11n_cleanup_reorder_tbl(priv);
 519         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 520
 521         mwifiex_wmm_cleanup_queues(priv);
 522         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
 523
 524         if (priv->adapter->if_ops.cleanup_mpa_buf)
 525                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
 526
 527         mwifiex_wmm_delete_all_ralist(priv);
 528         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 529
 530         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 531 }
 532
 533 /*
 534  * This function retrieves a particular RA list node, matching with the
 535  * given TID and RA address.
 536  */
 537 static struct mwifiex_ra_list_tbl *
 538 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
 539                             u8 *ra_addr)
 540 {
 541         struct mwifiex_ra_list_tbl *ra_list;
 542
 543         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
 544                             list) {
 545                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
 546                         return ra_list;
 547         }
 548
 549         return NULL;
 550 }
 551
 552 /*
 553  * This function retrieves an RA list node for a given TID and
 554  * RA address pair.
 555  *
 556  * If no such node is found, a new node is added first and then
 557  * retrieved.
 558  */
 559 static struct mwifiex_ra_list_tbl *
 560 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
 561 {
 562         struct mwifiex_ra_list_tbl *ra_list;
 563
 564         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 565         if (ra_list)
 566                 return ra_list;
 567         mwifiex_ralist_add(priv, ra_addr);
 568
 569         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 570 }
 571
 572 /*
 573  * This function checks if a particular RA list node exists in a given TID
 574  * table index.
 575  */
 576 int
 577 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
 578                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
 579 {
 580         struct mwifiex_ra_list_tbl *rlist;
 581
 582         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
 583                             list) {
 584                 if (rlist == ra_list)
 585                         return true;
 586         }
 587
 588         return false;
 589 }
 590
 591 /*
 592  * This function adds a packet to WMM queue.
 593  *
 594  * In disconnected state the packet is immediately dropped and the
 595  * packet send completion callback is called with status failure.
 596  *
 597  * Otherwise, the correct RA list node is located and the packet
 598  * is queued at the list tail.
 599  */
 600 void
 601 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
 602                             struct sk_buff *skb)
 603 {
 604         struct mwifiex_adapter *adapter = priv->adapter;
 605         u32 tid;
 606         struct mwifiex_ra_list_tbl *ra_list;
 607         u8 ra[ETH_ALEN], tid_down;
 608         unsigned long flags;
 609
 610         if (!priv->media_connected) {
 611                 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
 612                 mwifiex_write_data_complete(adapter, skb, -1);
 613                 return;
 614         }
 615
 616         tid = skb->priority;
 617
 618         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 619
 620         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 621
 622         /* In case of infra as we have already created the list during
 623            association we just don't have to call get_queue_raptr, we will
 624            have only 1 raptr for a tid in case of infra */
 625         if (!mwifiex_queuing_ra_based(priv)) {
 626                 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
 627                         ra_list = list_first_entry(
 628                                 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
 629                                 struct mwifiex_ra_list_tbl, list);
 630                 else
 631                         ra_list = NULL;
 632         } else {
 633                 memcpy(ra, skb->data, ETH_ALEN);
 634                 if (ra[0] & 0x01)
 635                         memset(ra, 0xff, ETH_ALEN);
 636                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
 637         }
 638
 639         if (!ra_list) {
 640                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 641                 mwifiex_write_data_complete(adapter, skb, -1);
 642                 return;
 643         }
 644
 645         skb_queue_tail(&ra_list->skb_head, skb);
 646
 647         ra_list->total_pkts_size += skb->len;
 648
 649         atomic_inc(&priv->wmm.tx_pkts_queued);
 650
 651         if (atomic_read(&priv->wmm.highest_queued_prio) <
 652                                                 tos_to_tid_inv[tid_down])
 653                 atomic_set(&priv->wmm.highest_queued_prio,
 654                            tos_to_tid_inv[tid_down]);
 655
 656         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 657 }
 658
 659 /*
 660  * This function processes the get WMM status command response from firmware.
 661  *
 662  * The response may contain multiple TLVs -
 663  *      - AC Queue status TLVs
 664  *      - Current WMM Parameter IE TLV
 665  *      - Admission Control action frame TLVs
 666  *
 667  * This function parses the TLVs and then calls further specific functions
 668  * to process any changes in the queue prioritize or state.
 669  */
 670 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
 671                                const struct host_cmd_ds_command *resp)
 672 {
 673         u8 *curr = (u8 *) &resp->params.get_wmm_status;
 674         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
 675         int valid = true;
 676
 677         struct mwifiex_ie_types_data *tlv_hdr;
 678         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
 679         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
 680         struct mwifiex_wmm_ac_status *ac_status;
 681
 682         dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
 683                 resp_len);
 684
 685         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
 686                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
 687                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
 688
 689                 switch (le16_to_cpu(tlv_hdr->header.type)) {
 690                 case TLV_TYPE_WMMQSTATUS:
 691                         tlv_wmm_qstatus =
 692                                 (struct mwifiex_ie_types_wmm_queue_status *)
 693                                 tlv_hdr;
 694                         dev_dbg(priv->adapter->dev,
 695                                 "info: CMD_RESP: WMM_GET_STATUS:"
 696                                 " QSTATUS TLV: %d, %d, %d\n",
 697                                 tlv_wmm_qstatus->queue_index,
 698                                 tlv_wmm_qstatus->flow_required,
 699                                 tlv_wmm_qstatus->disabled);
 700
 701                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
 702                                                          queue_index];
 703                         ac_status->disabled = tlv_wmm_qstatus->disabled;
 704                         ac_status->flow_required =
 705                                                 tlv_wmm_qstatus->flow_required;
 706                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
 707                         break;
 708
 709                 case WLAN_EID_VENDOR_SPECIFIC:
 710                         /*
 711                          * Point the regular IEEE IE 2 bytes into the Marvell IE
 712                          *   and setup the IEEE IE type and length byte fields
 713                          */
 714
 715                         wmm_param_ie =
 716                                 (struct ieee_types_wmm_parameter *) (curr +
 717                                                                     2);
 718                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
 719                         wmm_param_ie->vend_hdr.element_id =
 720                                                 WLAN_EID_VENDOR_SPECIFIC;
 721
 722                         dev_dbg(priv->adapter->dev,
 723                                 "info: CMD_RESP: WMM_GET_STATUS:"
 724                                 " WMM Parameter Set Count: %d\n",
 725                                 wmm_param_ie->qos_info_bitmap &
 726                                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
 727
 728                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
 729                                wmm_ie, wmm_param_ie,
 730                                wmm_param_ie->vend_hdr.len + 2);
 731
 732                         break;
 733
 734                 default:
 735                         valid = false;
 736                         break;
 737                 }
 738
 739                 curr += (tlv_len + sizeof(tlv_hdr->header));
 740                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
 741         }
 742
 743         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
 744         mwifiex_wmm_setup_ac_downgrade(priv);
 745
 746         return 0;
 747 }
 748
 749 /*
 750  * Callback handler from the command module to allow insertion of a WMM TLV.
 751  *
 752  * If the BSS we are associating to supports WMM, this function adds the
 753  * required WMM Information IE to the association request command buffer in
 754  * the form of a Marvell extended IEEE IE.
 755  */
 756 u32
 757 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
 758                                     u8 **assoc_buf,
 759                                     struct ieee_types_wmm_parameter *wmm_ie,
 760                                     struct ieee80211_ht_cap *ht_cap)
 761 {
 762         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
 763         u32 ret_len = 0;
 764
 765         /* Null checks */
 766         if (!assoc_buf)
 767                 return 0;
 768         if (!(*assoc_buf))
 769                 return 0;
 770
 771         if (!wmm_ie)
 772                 return 0;
 773
 774         dev_dbg(priv->adapter->dev,
 775                 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
 776                 wmm_ie->vend_hdr.element_id);
 777
 778         if ((priv->wmm_required ||
 779              (ht_cap && (priv->adapter->config_bands & BAND_GN ||
 780              priv->adapter->config_bands & BAND_AN))) &&
 781             wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
 782                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
 783                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
 784                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
 785                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
 786                        le16_to_cpu(wmm_tlv->header.len));
 787                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
 788                         memcpy((u8 *) (wmm_tlv->wmm_ie
 789                                        + le16_to_cpu(wmm_tlv->header.len)
 790                                        - sizeof(priv->wmm_qosinfo)),
 791                                &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
 792
 793                 ret_len = sizeof(wmm_tlv->header)
 794                           + le16_to_cpu(wmm_tlv->header.len);
 795
 796                 *assoc_buf += ret_len;
 797         }
 798
 799         return ret_len;
 800 }
 801
 802 /*
 803  * This function computes the time delay in the driver queues for a
 804  * given packet.
 805  *
 806  * When the packet is received at the OS/Driver interface, the current
 807  * time is set in the packet structure. The difference between the present
 808  * time and that received time is computed in this function and limited
 809  * based on pre-compiled limits in the driver.
 810  */
 811 u8
 812 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
 813                                   const struct sk_buff *skb)
 814 {
 815         u8 ret_val;
 816         struct timeval out_tstamp, in_tstamp;
 817         u32 queue_delay;
 818
 819         do_gettimeofday(&out_tstamp);
 820         in_tstamp = ktime_to_timeval(skb->tstamp);
 821
 822         queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
 823         queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
 824
 825         /*
 826          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
 827          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
 828          *
 829          * Pass max value if queue_delay is beyond the uint8 range
 830          */
 831         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
 832
 833         dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
 834                                 " %d ms sent to FW\n", queue_delay, ret_val);
 835
 836         return ret_val;
 837 }
 838
 839 /*
 840  * This function retrieves the highest priority RA list table pointer.
 841  */
 842 static struct mwifiex_ra_list_tbl *
 843 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 844                                      struct mwifiex_private **priv, int *tid)
 845 {
 846         struct mwifiex_private *priv_tmp;
 847         struct mwifiex_ra_list_tbl *ptr, *head;
 848         struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
 849         struct mwifiex_tid_tbl *tid_ptr;
 850         atomic_t *hqp;
 851         int is_list_empty;
 852         unsigned long flags;
 853         int i, j;
 854
 855         for (j = adapter->priv_num - 1; j >= 0; --j) {
 856                 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
 857                                   flags);
 858                 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
 859                                            .bss_prio_head);
 860                 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
 861                                        flags);
 862                 if (is_list_empty)
 863                         continue;
 864
 865                 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
 866                     (struct mwifiex_bss_prio_node *)
 867                     &adapter->bss_prio_tbl[j].bss_prio_head) {
 868                         bssprio_node =
 869                                 list_first_entry(&adapter->bss_prio_tbl[j]
 870                                                  .bss_prio_head,
 871                                                  struct mwifiex_bss_prio_node,
 872                                                  list);
 873                         bssprio_head = bssprio_node;
 874                 } else {
 875                         bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
 876                         bssprio_head = bssprio_node;
 877                 }
 878
 879                 do {
 880                         priv_tmp = bssprio_node->priv;
 881                         hqp = &priv_tmp->wmm.highest_queued_prio;
 882
 883                         for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
 884
 885                                 tid_ptr = &(priv_tmp)->wmm.
 886                                         tid_tbl_ptr[tos_to_tid[i]];
 887
 888                                 /* For non-STA ra_list_curr may be NULL */
 889                                 if (!tid_ptr->ra_list_curr)
 890                                         continue;
 891
 892                                 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
 893                                                   flags);
 894                                 is_list_empty =
 895                                         list_empty(&adapter->bss_prio_tbl[j]
 896                                                    .bss_prio_head);
 897                                 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
 898                                                        flags);
 899                                 if (is_list_empty)
 900                                         continue;
 901
 902                                 /*
 903                                  * Always choose the next ra we transmitted
 904                                  * last time, this way we pick the ra's in
 905                                  * round robin fashion.
 906                                  */
 907                                 ptr = list_first_entry(
 908                                                 &tid_ptr->ra_list_curr->list,
 909                                                 struct mwifiex_ra_list_tbl,
 910                                                 list);
 911
 912                                 head = ptr;
 913                                 if (ptr == (struct mwifiex_ra_list_tbl *)
 914                                                 &tid_ptr->ra_list) {
 915                                         /* Get next ra */
 916                                         ptr = list_first_entry(&ptr->list,
 917                                             struct mwifiex_ra_list_tbl, list);
 918                                         head = ptr;
 919                                 }
 920
 921                                 do {
 922                                         is_list_empty =
 923                                                 skb_queue_empty(&ptr->skb_head);
 924
 925                                         if (!is_list_empty)
 926                                                 goto found;
 927
 928                                         /* Get next ra */
 929                                         ptr = list_first_entry(&ptr->list,
 930                                                  struct mwifiex_ra_list_tbl,
 931                                                  list);
 932                                         if (ptr ==
 933                                             (struct mwifiex_ra_list_tbl *)
 934                                             &tid_ptr->ra_list)
 935                                                 ptr = list_first_entry(
 936                                                     &ptr->list,
 937                                                     struct mwifiex_ra_list_tbl,
 938                                                     list);
 939                                 } while (ptr != head);
 940                         }
 941
 942                         /* No packet at any TID for this priv. Mark as such
 943                          * to skip checking TIDs for this priv (until pkt is
 944                          * added).
 945                          */
 946                         atomic_set(hqp, NO_PKT_PRIO_TID);
 947
 948                         /* Get next bss priority node */
 949                         bssprio_node = list_first_entry(&bssprio_node->list,
 950                                                 struct mwifiex_bss_prio_node,
 951                                                 list);
 952
 953                         if (bssprio_node ==
 954                             (struct mwifiex_bss_prio_node *)
 955                             &adapter->bss_prio_tbl[j].bss_prio_head)
 956                                 /* Get next bss priority node */
 957                                 bssprio_node = list_first_entry(
 958                                                 &bssprio_node->list,
 959                                                 struct mwifiex_bss_prio_node,
 960                                                 list);
 961                 } while (bssprio_node != bssprio_head);
 962         }
 963         return NULL;
 964
 965 found:
 966         spin_lock_irqsave(&priv_tmp->wmm.ra_list_spinlock, flags);
 967         if (atomic_read(hqp) > i)
 968                 atomic_set(hqp, i);
 969         spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags);
 970
 971         *priv = priv_tmp;
 972         *tid = tos_to_tid[i];
 973
 974         return ptr;
 975 }
 976
 977 /*
 978  * This function checks if 11n aggregation is possible.
 979  */
 980 static int
 981 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
 982                                     struct mwifiex_ra_list_tbl *ptr,
 983                                     int max_buf_size)
 984 {
 985         int count = 0, total_size = 0;
 986         struct sk_buff *skb, *tmp;
 987
 988         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
 989                 total_size += skb->len;
 990                 if (total_size >= max_buf_size)
 991                         break;
 992                 if (++count >= MIN_NUM_AMSDU)
 993                         return true;
 994         }
 995
 996         return false;
 997 }
 998
 999 /*
1000  * This function sends a single packet to firmware for transmission.
1001  */
1002 static void
1003 mwifiex_send_single_packet(struct mwifiex_private *priv,
1004                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1005                            unsigned long ra_list_flags)
1006                            __releases(&priv->wmm.ra_list_spinlock)
1007 {
1008         struct sk_buff *skb, *skb_next;
1009         struct mwifiex_tx_param tx_param;
1010         struct mwifiex_adapter *adapter = priv->adapter;
1011         struct mwifiex_txinfo *tx_info;
1012
1013         if (skb_queue_empty(&ptr->skb_head)) {
1014                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1015                                        ra_list_flags);
1016                 dev_dbg(adapter->dev, "data: nothing to send\n");
1017                 return;
1018         }
1019
1020         skb = skb_dequeue(&ptr->skb_head);
1021
1022         tx_info = MWIFIEX_SKB_TXCB(skb);
1023         dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1024
1025         ptr->total_pkts_size -= skb->len;
1026
1027         if (!skb_queue_empty(&ptr->skb_head))
1028                 skb_next = skb_peek(&ptr->skb_head);
1029         else
1030                 skb_next = NULL;
1031
1032         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1033
1034         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1035                                 sizeof(struct txpd) : 0);
1036
1037         if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1038                 /* Queue the packet back at the head */
1039                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1040
1041                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1042                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1043                                                ra_list_flags);
1044                         mwifiex_write_data_complete(adapter, skb, -1);
1045                         return;
1046                 }
1047
1048                 skb_queue_tail(&ptr->skb_head, skb);
1049
1050                 ptr->total_pkts_size += skb->len;
1051                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1052                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1053                                        ra_list_flags);
1054         } else {
1055                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1056                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1057                         priv->wmm.packets_out[ptr_index]++;
1058                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1059                 }
1060                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1061                         list_first_entry(
1062                                 &adapter->bss_prio_tbl[priv->bss_priority]
1063                                 .bss_prio_cur->list,
1064                                 struct mwifiex_bss_prio_node,
1065                                 list);
1066                 atomic_dec(&priv->wmm.tx_pkts_queued);
1067                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1068                                        ra_list_flags);
1069         }
1070 }
1071
1072 /*
1073  * This function checks if the first packet in the given RA list
1074  * is already processed or not.
1075  */
1076 static int
1077 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1078                          struct mwifiex_ra_list_tbl *ptr)
1079 {
1080         struct sk_buff *skb;
1081         struct mwifiex_txinfo *tx_info;
1082
1083         if (skb_queue_empty(&ptr->skb_head))
1084                 return false;
1085
1086         skb = skb_peek(&ptr->skb_head);
1087
1088         tx_info = MWIFIEX_SKB_TXCB(skb);
1089         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1090                 return true;
1091
1092         return false;
1093 }
1094
1095 /*
1096  * This function sends a single processed packet to firmware for
1097  * transmission.
1098  */
1099 static void
1100 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1101                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1102                               unsigned long ra_list_flags)
1103                                 __releases(&priv->wmm.ra_list_spinlock)
1104 {
1105         struct mwifiex_tx_param tx_param;
1106         struct mwifiex_adapter *adapter = priv->adapter;
1107         int ret = -1;
1108         struct sk_buff *skb, *skb_next;
1109         struct mwifiex_txinfo *tx_info;
1110
1111         if (skb_queue_empty(&ptr->skb_head)) {
1112                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1113                                        ra_list_flags);
1114                 return;
1115         }
1116
1117         skb = skb_dequeue(&ptr->skb_head);
1118
1119         if (!skb_queue_empty(&ptr->skb_head))
1120                 skb_next = skb_peek(&ptr->skb_head);
1121         else
1122                 skb_next = NULL;
1123
1124         tx_info = MWIFIEX_SKB_TXCB(skb);
1125
1126         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1127
1128         if (adapter->iface_type == MWIFIEX_USB) {
1129                 adapter->data_sent = true;
1130                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
1131                                                    skb, NULL);
1132         } else {
1133                 tx_param.next_pkt_len =
1134                         ((skb_next) ? skb_next->len +
1135                          sizeof(struct txpd) : 0);
1136                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1137                                                    skb, &tx_param);
1138         }
1139
1140         switch (ret) {
1141         case -EBUSY:
1142                 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1143                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1144
1145                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1146                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1147                                                ra_list_flags);
1148                         mwifiex_write_data_complete(adapter, skb, -1);
1149                         return;
1150                 }
1151
1152                 skb_queue_tail(&ptr->skb_head, skb);
1153
1154                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1155                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1156                                        ra_list_flags);
1157                 break;
1158         case -1:
1159                 adapter->data_sent = false;
1160                 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1161                 adapter->dbg.num_tx_host_to_card_failure++;
1162                 mwifiex_write_data_complete(adapter, skb, ret);
1163                 break;
1164         case -EINPROGRESS:
1165                 adapter->data_sent = false;
1166         default:
1167                 break;
1168         }
1169         if (ret != -EBUSY) {
1170                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1171                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1172                         priv->wmm.packets_out[ptr_index]++;
1173                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1174                 }
1175                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1176                         list_first_entry(
1177                                 &adapter->bss_prio_tbl[priv->bss_priority]
1178                                 .bss_prio_cur->list,
1179                                 struct mwifiex_bss_prio_node,
1180                                 list);
1181                 atomic_dec(&priv->wmm.tx_pkts_queued);
1182                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1183                                        ra_list_flags);
1184         }
1185 }
1186
1187 /*
1188  * This function dequeues a packet from the highest priority list
1189  * and transmits it.
1190  */
1191 static int
1192 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1193 {
1194         struct mwifiex_ra_list_tbl *ptr;
1195         struct mwifiex_private *priv = NULL;
1196         int ptr_index = 0;
1197         u8 ra[ETH_ALEN];
1198         int tid_del = 0, tid = 0;
1199         unsigned long flags;
1200
1201         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1202         if (!ptr)
1203                 return -1;
1204
1205         tid = mwifiex_get_tid(ptr);
1206
1207         dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1208
1209         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1210         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1211                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1212                 return -1;
1213         }
1214
1215         if (mwifiex_is_ptr_processed(priv, ptr)) {
1216                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1217                 /* ra_list_spinlock has been freed in
1218                    mwifiex_send_processed_packet() */
1219                 return 0;
1220         }
1221
1222         if (!ptr->is_11n_enabled ||
1223             mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
1224             ((priv->sec_info.wpa_enabled ||
1225               priv->sec_info.wpa2_enabled) &&
1226              !priv->wpa_is_gtk_set)) {
1227                 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1228                 /* ra_list_spinlock has been freed in
1229                    mwifiex_send_single_packet() */
1230         } else {
1231                 if (mwifiex_is_ampdu_allowed(priv, tid)) {
1232                         if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1233                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1234                                                       BA_SETUP_INPROGRESS);
1235                                 mwifiex_send_addba(priv, tid, ptr->ra);
1236                         } else if (mwifiex_find_stream_to_delete
1237                                    (priv, tid, &tid_del, ra)) {
1238                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1239                                                       BA_SETUP_INPROGRESS);
1240                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1241                         }
1242                 }
1243                 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1244                     mwifiex_is_11n_aggragation_possible(priv, ptr,
1245                                                         adapter->tx_buf_size))
1246                         mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1247                                                   ptr_index, flags);
1248                         /* ra_list_spinlock has been freed in
1249                            mwifiex_11n_aggregate_pkt() */
1250                 else
1251                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1252                         /* ra_list_spinlock has been freed in
1253                            mwifiex_send_single_packet() */
1254         }
1255         return 0;
1256 }
1257
1258 /*
1259  * This function transmits the highest priority packet awaiting in the
1260  * WMM Queues.
1261  */
1262 void
1263 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1264 {
1265         do {
1266                 /* Check if busy */
1267                 if (adapter->data_sent || adapter->tx_lock_flag)
1268                         break;
1269
1270                 if (mwifiex_dequeue_tx_packet(adapter))
1271                         break;
1272         } while (!mwifiex_wmm_lists_empty(adapter));
1273 }