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 static int disable_tx_aggregation = 1;
  82 module_param(disable_tx_aggregation, int, 0644);
  83
  84 /*
  85  * This function debug prints the priority parameters for a WMM AC.
  86  */
  87 static void
  88 mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param)
  89 {
  90         const char *ac_str[] = { "BK", "BE", "VI", "VO" };
  91
  92         pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, "
  93                  "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
  94                  ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap
  95                                              & MWIFIEX_ACI) >> 5]],
  96                  (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5,
  97                  (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4,
  98                  ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN,
  99                  ac_param->ecw_bitmap & MWIFIEX_ECW_MIN,
 100                  (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4,
 101                  le16_to_cpu(ac_param->tx_op_limit));
 102 }
 103
 104 /*
 105  * This function allocates a route address list.
 106  *
 107  * The function also initializes the list with the provided RA.
 108  */
 109 static struct mwifiex_ra_list_tbl *
 110 mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, u8 *ra)
 111 {
 112         struct mwifiex_ra_list_tbl *ra_list;
 113
 114         ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC);
 115
 116         if (!ra_list) {
 117                 dev_err(adapter->dev, "%s: failed to alloc ra_list\n",
 118                         __func__);
 119                 return NULL;
 120         }
 121         INIT_LIST_HEAD(&ra_list->list);
 122         skb_queue_head_init(&ra_list->skb_head);
 123
 124         memcpy(ra_list->ra, ra, ETH_ALEN);
 125
 126         ra_list->total_pkts_size = 0;
 127
 128         dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list);
 129
 130         return ra_list;
 131 }
 132
 133 /*
 134  * This function allocates and adds a RA list for all TIDs
 135  * with the given RA.
 136  */
 137 void
 138 mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
 139 {
 140         int i;
 141         struct mwifiex_ra_list_tbl *ra_list;
 142         struct mwifiex_adapter *adapter = priv->adapter;
 143
 144         for (i = 0; i < MAX_NUM_TID; ++i) {
 145                 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
 146                 dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);
 147
 148                 if (!ra_list)
 149                         break;
 150
 151                 if (!mwifiex_queuing_ra_based(priv))
 152                         ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
 153                 else
 154                         ra_list->is_11n_enabled = false;
 155
 156                 dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
 157                         ra_list, ra_list->is_11n_enabled);
 158
 159                 list_add_tail(&ra_list->list,
 160                               &priv->wmm.tid_tbl_ptr[i].ra_list);
 161
 162                 if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
 163                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
 164         }
 165 }
 166
 167 /*
 168  * This function sets the WMM queue priorities to their default values.
 169  */
 170 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
 171 {
 172         /* Default queue priorities: VO->VI->BE->BK */
 173         priv->wmm.queue_priority[0] = WMM_AC_VO;
 174         priv->wmm.queue_priority[1] = WMM_AC_VI;
 175         priv->wmm.queue_priority[2] = WMM_AC_BE;
 176         priv->wmm.queue_priority[3] = WMM_AC_BK;
 177 }
 178
 179 /*
 180  * This function map ACs to TIDs.
 181  */
 182 static void
 183 mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
 184 {
 185         u8 *queue_priority = wmm->queue_priority;
 186         int i;
 187
 188         for (i = 0; i < 4; ++i) {
 189                 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
 190                 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
 191         }
 192
 193         for (i = 0; i < MAX_NUM_TID; ++i)
 194                 tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
 195
 196         atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
 197 }
 198
 199 /*
 200  * This function initializes WMM priority queues.
 201  */
 202 void
 203 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
 204                                    struct ieee_types_wmm_parameter *wmm_ie)
 205 {
 206         u16 cw_min, avg_back_off, tmp[4];
 207         u32 i, j, num_ac;
 208         u8 ac_idx;
 209
 210         if (!wmm_ie || !priv->wmm_enabled) {
 211                 /* WMM is not enabled, just set the defaults and return */
 212                 mwifiex_wmm_default_queue_priorities(priv);
 213                 return;
 214         }
 215
 216         dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
 217                 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
 218                 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
 219                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
 220                 wmm_ie->reserved);
 221
 222         for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
 223                 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
 224                 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
 225                 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
 226                 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
 227
 228                 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
 229                 priv->wmm.queue_priority[ac_idx] = ac_idx;
 230                 tmp[ac_idx] = avg_back_off;
 231
 232                 dev_dbg(priv->adapter->dev,
 233                         "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
 234                         (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
 235                         cw_min, avg_back_off);
 236                 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
 237         }
 238
 239         /* Bubble sort */
 240         for (i = 0; i < num_ac; i++) {
 241                 for (j = 1; j < num_ac - i; j++) {
 242                         if (tmp[j - 1] > tmp[j]) {
 243                                 swap(tmp[j - 1], tmp[j]);
 244                                 swap(priv->wmm.queue_priority[j - 1],
 245                                      priv->wmm.queue_priority[j]);
 246                         } else if (tmp[j - 1] == tmp[j]) {
 247                                 if (priv->wmm.queue_priority[j - 1]
 248                                     < priv->wmm.queue_priority[j])
 249                                         swap(priv->wmm.queue_priority[j - 1],
 250                                              priv->wmm.queue_priority[j]);
 251                         }
 252                 }
 253         }
 254
 255         mwifiex_wmm_queue_priorities_tid(&priv->wmm);
 256 }
 257
 258 /*
 259  * This function evaluates whether or not an AC is to be downgraded.
 260  *
 261  * In case the AC is not enabled, the highest AC is returned that is
 262  * enabled and does not require admission control.
 263  */
 264 static enum mwifiex_wmm_ac_e
 265 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
 266                               enum mwifiex_wmm_ac_e eval_ac)
 267 {
 268         int down_ac;
 269         enum mwifiex_wmm_ac_e ret_ac;
 270         struct mwifiex_wmm_ac_status *ac_status;
 271
 272         ac_status = &priv->wmm.ac_status[eval_ac];
 273
 274         if (!ac_status->disabled)
 275                 /* Okay to use this AC, its enabled */
 276                 return eval_ac;
 277
 278         /* Setup a default return value of the lowest priority */
 279         ret_ac = WMM_AC_BK;
 280
 281         /*
 282          *  Find the highest AC that is enabled and does not require
 283          *  admission control. The spec disallows downgrading to an AC,
 284          *  which is enabled due to a completed admission control.
 285          *  Unadmitted traffic is not to be sent on an AC with admitted
 286          *  traffic.
 287          */
 288         for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
 289                 ac_status = &priv->wmm.ac_status[down_ac];
 290
 291                 if (!ac_status->disabled && !ac_status->flow_required)
 292                         /* AC is enabled and does not require admission
 293                            control */
 294                         ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
 295         }
 296
 297         return ret_ac;
 298 }
 299
 300 /*
 301  * This function downgrades WMM priority queue.
 302  */
 303 void
 304 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
 305 {
 306         int ac_val;
 307
 308         dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
 309                         "BK(0), BE(1), VI(2), VO(3)\n");
 310
 311         if (!priv->wmm_enabled) {
 312                 /* WMM is not enabled, default priorities */
 313                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
 314                         priv->wmm.ac_down_graded_vals[ac_val] =
 315                                                 (enum mwifiex_wmm_ac_e) ac_val;
 316         } else {
 317                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
 318                         priv->wmm.ac_down_graded_vals[ac_val]
 319                                 = mwifiex_wmm_eval_downgrade_ac(priv,
 320                                                 (enum mwifiex_wmm_ac_e) ac_val);
 321                         dev_dbg(priv->adapter->dev,
 322                                 "info: WMM: AC PRIO %d maps to %d\n",
 323                                 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
 324                 }
 325         }
 326 }
 327
 328 /*
 329  * This function converts the IP TOS field to an WMM AC
 330  * Queue assignment.
 331  */
 332 static enum mwifiex_wmm_ac_e
 333 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
 334 {
 335         /* Map of TOS UP values to WMM AC */
 336         const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
 337                 WMM_AC_BK,
 338                 WMM_AC_BK,
 339                 WMM_AC_BE,
 340                 WMM_AC_VI,
 341                 WMM_AC_VI,
 342                 WMM_AC_VO,
 343                 WMM_AC_VO
 344         };
 345
 346         if (tos >= ARRAY_SIZE(tos_to_ac))
 347                 return WMM_AC_BE;
 348
 349         return tos_to_ac[tos];
 350 }
 351
 352 /*
 353  * This function evaluates a given TID and downgrades it to a lower
 354  * TID if the WMM Parameter IE received from the AP indicates that the
 355  * AP is disabled (due to call admission control (ACM bit). Mapping
 356  * of TID to AC is taken care of internally.
 357  */
 358 static u8
 359 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
 360 {
 361         enum mwifiex_wmm_ac_e ac, ac_down;
 362         u8 new_tid;
 363
 364         ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
 365         ac_down = priv->wmm.ac_down_graded_vals[ac];
 366
 367         /* Send the index to tid array, picking from the array will be
 368          * taken care by dequeuing function
 369          */
 370         new_tid = ac_to_tid[ac_down][tid % 2];
 371
 372         return new_tid;
 373 }
 374
 375 /*
 376  * This function initializes the WMM state information and the
 377  * WMM data path queues.
 378  */
 379 void
 380 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
 381 {
 382         int i, j;
 383         struct mwifiex_private *priv;
 384
 385         for (j = 0; j < adapter->priv_num; ++j) {
 386                 priv = adapter->priv[j];
 387                 if (!priv)
 388                         continue;
 389
 390                 for (i = 0; i < MAX_NUM_TID; ++i) {
 391                         priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
 392                         priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
 393                         priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
 394                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 395                 }
 396
 397                 priv->aggr_prio_tbl[6].amsdu
 398                                         = priv->aggr_prio_tbl[6].ampdu_ap
 399                                         = priv->aggr_prio_tbl[6].ampdu_user
 400                                         = BA_STREAM_NOT_ALLOWED;
 401
 402                 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
 403                                         = priv->aggr_prio_tbl[7].ampdu_user
 404                                         = BA_STREAM_NOT_ALLOWED;
 405
 406                 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
 407                 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
 408                 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
 409
 410                 mwifiex_reset_11n_rx_seq_num(priv);
 411
 412                 atomic_set(&priv->wmm.tx_pkts_queued, 0);
 413                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 414         }
 415 }
 416
 417 /*
 418  * This function checks if WMM Tx queue is empty.
 419  */
 420 int
 421 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
 422 {
 423         int i;
 424         struct mwifiex_private *priv;
 425
 426         for (i = 0; i < adapter->priv_num; ++i) {
 427                 priv = adapter->priv[i];
 428                 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
 429                                 return false;
 430         }
 431
 432         return true;
 433 }
 434
 435 /*
 436  * This function deletes all packets in an RA list node.
 437  *
 438  * The packet sent completion callback handler are called with
 439  * status failure, after they are dequeued to ensure proper
 440  * cleanup. The RA list node itself is freed at the end.
 441  */
 442 static void
 443 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
 444                                     struct mwifiex_ra_list_tbl *ra_list)
 445 {
 446         struct mwifiex_adapter *adapter = priv->adapter;
 447         struct sk_buff *skb, *tmp;
 448
 449         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
 450                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 451 }
 452
 453 /*
 454  * This function deletes all packets in an RA list.
 455  *
 456  * Each nodes in the RA list are freed individually first, and then
 457  * the RA list itself is freed.
 458  */
 459 static void
 460 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
 461                                struct list_head *ra_list_head)
 462 {
 463         struct mwifiex_ra_list_tbl *ra_list;
 464
 465         list_for_each_entry(ra_list, ra_list_head, list)
 466                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 467 }
 468
 469 /*
 470  * This function deletes all packets in all RA lists.
 471  */
 472 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
 473 {
 474         int i;
 475
 476         for (i = 0; i < MAX_NUM_TID; i++)
 477                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
 478                                                                        ra_list);
 479
 480         atomic_set(&priv->wmm.tx_pkts_queued, 0);
 481         atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 482 }
 483
 484 /*
 485  * This function deletes all route addresses from all RA lists.
 486  */
 487 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 488 {
 489         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
 490         int i;
 491
 492         for (i = 0; i < MAX_NUM_TID; ++i) {
 493                 dev_dbg(priv->adapter->dev,
 494                         "info: ra_list: freeing buf for tid %d\n", i);
 495                 list_for_each_entry_safe(ra_list, tmp_node,
 496                                          &priv->wmm.tid_tbl_ptr[i].ra_list,
 497                                          list) {
 498                         list_del(&ra_list->list);
 499                         kfree(ra_list);
 500                 }
 501
 502                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
 503
 504                 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 505         }
 506 }
 507
 508 /*
 509  * This function cleans up the Tx and Rx queues.
 510  *
 511  * Cleanup includes -
 512  *      - All packets in RA lists
 513  *      - All entries in Rx reorder table
 514  *      - All entries in Tx BA stream table
 515  *      - MPA buffer (if required)
 516  *      - All RA lists
 517  */
 518 void
 519 mwifiex_clean_txrx(struct mwifiex_private *priv)
 520 {
 521         unsigned long flags;
 522
 523         mwifiex_11n_cleanup_reorder_tbl(priv);
 524         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 525
 526         mwifiex_wmm_cleanup_queues(priv);
 527         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
 528
 529         if (priv->adapter->if_ops.cleanup_mpa_buf)
 530                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
 531
 532         mwifiex_wmm_delete_all_ralist(priv);
 533         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 534
 535         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 536 }
 537
 538 /*
 539  * This function retrieves a particular RA list node, matching with the
 540  * given TID and RA address.
 541  */
 542 static struct mwifiex_ra_list_tbl *
 543 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
 544                             u8 *ra_addr)
 545 {
 546         struct mwifiex_ra_list_tbl *ra_list;
 547
 548         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
 549                             list) {
 550                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
 551                         return ra_list;
 552         }
 553
 554         return NULL;
 555 }
 556
 557 /*
 558  * This function retrieves an RA list node for a given TID and
 559  * RA address pair.
 560  *
 561  * If no such node is found, a new node is added first and then
 562  * retrieved.
 563  */
 564 static struct mwifiex_ra_list_tbl *
 565 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
 566 {
 567         struct mwifiex_ra_list_tbl *ra_list;
 568
 569         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 570         if (ra_list)
 571                 return ra_list;
 572         mwifiex_ralist_add(priv, ra_addr);
 573
 574         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 575 }
 576
 577 /*
 578  * This function checks if a particular RA list node exists in a given TID
 579  * table index.
 580  */
 581 int
 582 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
 583                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
 584 {
 585         struct mwifiex_ra_list_tbl *rlist;
 586
 587         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
 588                             list) {
 589                 if (rlist == ra_list)
 590                         return true;
 591         }
 592
 593         return false;
 594 }
 595
 596 /*
 597  * This function adds a packet to WMM queue.
 598  *
 599  * In disconnected state the packet is immediately dropped and the
 600  * packet send completion callback is called with status failure.
 601  *
 602  * Otherwise, the correct RA list node is located and the packet
 603  * is queued at the list tail.
 604  */
 605 void
 606 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
 607                             struct sk_buff *skb)
 608 {
 609         struct mwifiex_adapter *adapter = priv->adapter;
 610         u32 tid;
 611         struct mwifiex_ra_list_tbl *ra_list;
 612         u8 ra[ETH_ALEN], tid_down;
 613         unsigned long flags;
 614
 615         if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
 616                 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
 617                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 618                 return;
 619         }
 620
 621         tid = skb->priority;
 622
 623         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 624
 625         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 626
 627         /* In case of infra as we have already created the list during
 628            association we just don't have to call get_queue_raptr, we will
 629            have only 1 raptr for a tid in case of infra */
 630         if (!mwifiex_queuing_ra_based(priv) &&
 631             !mwifiex_is_skb_mgmt_frame(skb)) {
 632                 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
 633                         ra_list = list_first_entry(
 634                                 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
 635                                 struct mwifiex_ra_list_tbl, list);
 636                 else
 637                         ra_list = NULL;
 638         } else {
 639                 memcpy(ra, skb->data, ETH_ALEN);
 640                 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
 641                         memset(ra, 0xff, ETH_ALEN);
 642                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
 643         }
 644
 645         if (!ra_list) {
 646                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 647                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 648                 return;
 649         }
 650
 651         skb_queue_tail(&ra_list->skb_head, skb);
 652
 653         ra_list->total_pkts_size += skb->len;
 654
 655         atomic_inc(&priv->wmm.tx_pkts_queued);
 656
 657         if (atomic_read(&priv->wmm.highest_queued_prio) <
 658                                                 tos_to_tid_inv[tid_down])
 659                 atomic_set(&priv->wmm.highest_queued_prio,
 660                            tos_to_tid_inv[tid_down]);
 661
 662         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 663 }
 664
 665 /*
 666  * This function processes the get WMM status command response from firmware.
 667  *
 668  * The response may contain multiple TLVs -
 669  *      - AC Queue status TLVs
 670  *      - Current WMM Parameter IE TLV
 671  *      - Admission Control action frame TLVs
 672  *
 673  * This function parses the TLVs and then calls further specific functions
 674  * to process any changes in the queue prioritize or state.
 675  */
 676 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
 677                                const struct host_cmd_ds_command *resp)
 678 {
 679         u8 *curr = (u8 *) &resp->params.get_wmm_status;
 680         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
 681         int valid = true;
 682
 683         struct mwifiex_ie_types_data *tlv_hdr;
 684         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
 685         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
 686         struct mwifiex_wmm_ac_status *ac_status;
 687
 688         dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
 689                 resp_len);
 690
 691         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
 692                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
 693                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
 694
 695                 switch (le16_to_cpu(tlv_hdr->header.type)) {
 696                 case TLV_TYPE_WMMQSTATUS:
 697                         tlv_wmm_qstatus =
 698                                 (struct mwifiex_ie_types_wmm_queue_status *)
 699                                 tlv_hdr;
 700                         dev_dbg(priv->adapter->dev,
 701                                 "info: CMD_RESP: WMM_GET_STATUS:"
 702                                 " QSTATUS TLV: %d, %d, %d\n",
 703                                 tlv_wmm_qstatus->queue_index,
 704                                 tlv_wmm_qstatus->flow_required,
 705                                 tlv_wmm_qstatus->disabled);
 706
 707                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
 708                                                          queue_index];
 709                         ac_status->disabled = tlv_wmm_qstatus->disabled;
 710                         ac_status->flow_required =
 711                                                 tlv_wmm_qstatus->flow_required;
 712                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
 713                         break;
 714
 715                 case WLAN_EID_VENDOR_SPECIFIC:
 716                         /*
 717                          * Point the regular IEEE IE 2 bytes into the Marvell IE
 718                          *   and setup the IEEE IE type and length byte fields
 719                          */
 720
 721                         wmm_param_ie =
 722                                 (struct ieee_types_wmm_parameter *) (curr +
 723                                                                     2);
 724                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
 725                         wmm_param_ie->vend_hdr.element_id =
 726                                                 WLAN_EID_VENDOR_SPECIFIC;
 727
 728                         dev_dbg(priv->adapter->dev,
 729                                 "info: CMD_RESP: WMM_GET_STATUS:"
 730                                 " WMM Parameter Set Count: %d\n",
 731                                 wmm_param_ie->qos_info_bitmap &
 732                                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
 733
 734                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
 735                                wmm_ie, wmm_param_ie,
 736                                wmm_param_ie->vend_hdr.len + 2);
 737
 738                         break;
 739
 740                 default:
 741                         valid = false;
 742                         break;
 743                 }
 744
 745                 curr += (tlv_len + sizeof(tlv_hdr->header));
 746                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
 747         }
 748
 749         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
 750         mwifiex_wmm_setup_ac_downgrade(priv);
 751
 752         return 0;
 753 }
 754
 755 /*
 756  * Callback handler from the command module to allow insertion of a WMM TLV.
 757  *
 758  * If the BSS we are associating to supports WMM, this function adds the
 759  * required WMM Information IE to the association request command buffer in
 760  * the form of a Marvell extended IEEE IE.
 761  */
 762 u32
 763 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
 764                                     u8 **assoc_buf,
 765                                     struct ieee_types_wmm_parameter *wmm_ie,
 766                                     struct ieee80211_ht_cap *ht_cap)
 767 {
 768         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
 769         u32 ret_len = 0;
 770
 771         /* Null checks */
 772         if (!assoc_buf)
 773                 return 0;
 774         if (!(*assoc_buf))
 775                 return 0;
 776
 777         if (!wmm_ie)
 778                 return 0;
 779
 780         dev_dbg(priv->adapter->dev,
 781                 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
 782                 wmm_ie->vend_hdr.element_id);
 783
 784         if ((priv->wmm_required ||
 785              (ht_cap && (priv->adapter->config_bands & BAND_GN ||
 786              priv->adapter->config_bands & BAND_AN))) &&
 787             wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
 788                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
 789                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
 790                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
 791                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
 792                        le16_to_cpu(wmm_tlv->header.len));
 793                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
 794                         memcpy((u8 *) (wmm_tlv->wmm_ie
 795                                        + le16_to_cpu(wmm_tlv->header.len)
 796                                        - sizeof(priv->wmm_qosinfo)),
 797                                &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
 798
 799                 ret_len = sizeof(wmm_tlv->header)
 800                           + le16_to_cpu(wmm_tlv->header.len);
 801
 802                 *assoc_buf += ret_len;
 803         }
 804
 805         return ret_len;
 806 }
 807
 808 /*
 809  * This function computes the time delay in the driver queues for a
 810  * given packet.
 811  *
 812  * When the packet is received at the OS/Driver interface, the current
 813  * time is set in the packet structure. The difference between the present
 814  * time and that received time is computed in this function and limited
 815  * based on pre-compiled limits in the driver.
 816  */
 817 u8
 818 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
 819                                   const struct sk_buff *skb)
 820 {
 821         u8 ret_val;
 822         struct timeval out_tstamp, in_tstamp;
 823         u32 queue_delay;
 824
 825         do_gettimeofday(&out_tstamp);
 826         in_tstamp = ktime_to_timeval(skb->tstamp);
 827
 828         queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
 829         queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
 830
 831         /*
 832          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
 833          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
 834          *
 835          * Pass max value if queue_delay is beyond the uint8 range
 836          */
 837         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
 838
 839         dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
 840                                 " %d ms sent to FW\n", queue_delay, ret_val);
 841
 842         return ret_val;
 843 }
 844
 845 /*
 846  * This function retrieves the highest priority RA list table pointer.
 847  */
 848 static struct mwifiex_ra_list_tbl *
 849 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 850                                      struct mwifiex_private **priv, int *tid)
 851 {
 852         struct mwifiex_private *priv_tmp;
 853         struct mwifiex_ra_list_tbl *ptr, *head;
 854         struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
 855         struct mwifiex_tid_tbl *tid_ptr;
 856         atomic_t *hqp;
 857         int is_list_empty;
 858         unsigned long flags;
 859         int i, j;
 860
 861         for (j = adapter->priv_num - 1; j >= 0; --j) {
 862                 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
 863                                   flags);
 864                 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
 865                                            .bss_prio_head);
 866                 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
 867                                        flags);
 868                 if (is_list_empty)
 869                         continue;
 870
 871                 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
 872                     (struct mwifiex_bss_prio_node *)
 873                     &adapter->bss_prio_tbl[j].bss_prio_head) {
 874                         bssprio_node =
 875                                 list_first_entry(&adapter->bss_prio_tbl[j]
 876                                                  .bss_prio_head,
 877                                                  struct mwifiex_bss_prio_node,
 878                                                  list);
 879                         bssprio_head = bssprio_node;
 880                 } else {
 881                         bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
 882                         bssprio_head = bssprio_node;
 883                 }
 884
 885                 do {
 886                         priv_tmp = bssprio_node->priv;
 887                         hqp = &priv_tmp->wmm.highest_queued_prio;
 888
 889                         for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
 890
 891                                 tid_ptr = &(priv_tmp)->wmm.
 892                                         tid_tbl_ptr[tos_to_tid[i]];
 893
 894                                 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
 895                                                   flags);
 896                                 is_list_empty =
 897                                         list_empty(&adapter->bss_prio_tbl[j]
 898                                                    .bss_prio_head);
 899                                 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
 900                                                        flags);
 901                                 if (is_list_empty)
 902                                         continue;
 903
 904                                 /*
 905                                  * Always choose the next ra we transmitted
 906                                  * last time, this way we pick the ra's in
 907                                  * round robin fashion.
 908                                  */
 909                                 ptr = list_first_entry(
 910                                                 &tid_ptr->ra_list_curr->list,
 911                                                 struct mwifiex_ra_list_tbl,
 912                                                 list);
 913
 914                                 head = ptr;
 915                                 if (ptr == (struct mwifiex_ra_list_tbl *)
 916                                                 &tid_ptr->ra_list) {
 917                                         /* Get next ra */
 918                                         ptr = list_first_entry(&ptr->list,
 919                                             struct mwifiex_ra_list_tbl, list);
 920                                         head = ptr;
 921                                 }
 922
 923                                 do {
 924                                         is_list_empty =
 925                                                 skb_queue_empty(&ptr->skb_head);
 926
 927                                         if (!is_list_empty)
 928                                                 goto found;
 929
 930                                         /* Get next ra */
 931                                         ptr = list_first_entry(&ptr->list,
 932                                                  struct mwifiex_ra_list_tbl,
 933                                                  list);
 934                                         if (ptr ==
 935                                             (struct mwifiex_ra_list_tbl *)
 936                                             &tid_ptr->ra_list)
 937                                                 ptr = list_first_entry(
 938                                                     &ptr->list,
 939                                                     struct mwifiex_ra_list_tbl,
 940                                                     list);
 941                                 } while (ptr != head);
 942                         }
 943
 944                         /* No packet at any TID for this priv. Mark as such
 945                          * to skip checking TIDs for this priv (until pkt is
 946                          * added).
 947                          */
 948                         atomic_set(hqp, NO_PKT_PRIO_TID);
 949
 950                         /* Get next bss priority node */
 951                         bssprio_node = list_first_entry(&bssprio_node->list,
 952                                                 struct mwifiex_bss_prio_node,
 953                                                 list);
 954
 955                         if (bssprio_node ==
 956                             (struct mwifiex_bss_prio_node *)
 957                             &adapter->bss_prio_tbl[j].bss_prio_head)
 958                                 /* Get next bss priority node */
 959                                 bssprio_node = list_first_entry(
 960                                                 &bssprio_node->list,
 961                                                 struct mwifiex_bss_prio_node,
 962                                                 list);
 963                 } while (bssprio_node != bssprio_head);
 964         }
 965         return NULL;
 966
 967 found:
 968         spin_lock_irqsave(&priv_tmp->wmm.ra_list_spinlock, flags);
 969         if (atomic_read(hqp) > i)
 970                 atomic_set(hqp, i);
 971         spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags);
 972
 973         *priv = priv_tmp;
 974         *tid = tos_to_tid[i];
 975
 976         return ptr;
 977 }
 978
 979 /*
 980  * This function checks if 11n aggregation is possible.
 981  */
 982 static int
 983 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
 984                                     struct mwifiex_ra_list_tbl *ptr,
 985                                     int max_buf_size)
 986 {
 987         int count = 0, total_size = 0;
 988         struct sk_buff *skb, *tmp;
 989
 990         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
 991                 total_size += skb->len;
 992                 if (total_size >= max_buf_size)
 993                         break;
 994                 if (++count >= MIN_NUM_AMSDU)
 995                         return true;
 996         }
 997
 998         return false;
 999 }
1000
1001 /*
1002  * This function sends a single packet to firmware for transmission.
1003  */
1004 static void
1005 mwifiex_send_single_packet(struct mwifiex_private *priv,
1006                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1007                            unsigned long ra_list_flags)
1008                            __releases(&priv->wmm.ra_list_spinlock)
1009 {
1010         struct sk_buff *skb, *skb_next;
1011         struct mwifiex_tx_param tx_param;
1012         struct mwifiex_adapter *adapter = priv->adapter;
1013         struct mwifiex_txinfo *tx_info;
1014
1015         if (skb_queue_empty(&ptr->skb_head)) {
1016                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1017                                        ra_list_flags);
1018                 dev_dbg(adapter->dev, "data: nothing to send\n");
1019                 return;
1020         }
1021
1022         skb = skb_dequeue(&ptr->skb_head);
1023
1024         tx_info = MWIFIEX_SKB_TXCB(skb);
1025         dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1026
1027         ptr->total_pkts_size -= skb->len;
1028
1029         if (!skb_queue_empty(&ptr->skb_head))
1030                 skb_next = skb_peek(&ptr->skb_head);
1031         else
1032                 skb_next = NULL;
1033
1034         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1035
1036         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1037                                 sizeof(struct txpd) : 0);
1038
1039         if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1040                 /* Queue the packet back at the head */
1041                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1042
1043                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1044                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1045                                                ra_list_flags);
1046                         mwifiex_write_data_complete(adapter, skb, 0, -1);
1047                         return;
1048                 }
1049
1050                 skb_queue_tail(&ptr->skb_head, skb);
1051
1052                 ptr->total_pkts_size += skb->len;
1053                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1054                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1055                                        ra_list_flags);
1056         } else {
1057                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1058                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1059                         priv->wmm.packets_out[ptr_index]++;
1060                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1061                 }
1062                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1063                         list_first_entry(
1064                                 &adapter->bss_prio_tbl[priv->bss_priority]
1065                                 .bss_prio_cur->list,
1066                                 struct mwifiex_bss_prio_node,
1067                                 list);
1068                 atomic_dec(&priv->wmm.tx_pkts_queued);
1069                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1070                                        ra_list_flags);
1071         }
1072 }
1073
1074 /*
1075  * This function checks if the first packet in the given RA list
1076  * is already processed or not.
1077  */
1078 static int
1079 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1080                          struct mwifiex_ra_list_tbl *ptr)
1081 {
1082         struct sk_buff *skb;
1083         struct mwifiex_txinfo *tx_info;
1084
1085         if (skb_queue_empty(&ptr->skb_head))
1086                 return false;
1087
1088         skb = skb_peek(&ptr->skb_head);
1089
1090         tx_info = MWIFIEX_SKB_TXCB(skb);
1091         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1092                 return true;
1093
1094         return false;
1095 }
1096
1097 /*
1098  * This function sends a single processed packet to firmware for
1099  * transmission.
1100  */
1101 static void
1102 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1103                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1104                               unsigned long ra_list_flags)
1105                                 __releases(&priv->wmm.ra_list_spinlock)
1106 {
1107         struct mwifiex_tx_param tx_param;
1108         struct mwifiex_adapter *adapter = priv->adapter;
1109         int ret = -1;
1110         struct sk_buff *skb, *skb_next;
1111         struct mwifiex_txinfo *tx_info;
1112
1113         if (skb_queue_empty(&ptr->skb_head)) {
1114                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1115                                        ra_list_flags);
1116                 return;
1117         }
1118
1119         skb = skb_dequeue(&ptr->skb_head);
1120
1121         if (!skb_queue_empty(&ptr->skb_head))
1122                 skb_next = skb_peek(&ptr->skb_head);
1123         else
1124                 skb_next = NULL;
1125
1126         tx_info = MWIFIEX_SKB_TXCB(skb);
1127
1128         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1129         tx_param.next_pkt_len =
1130                 ((skb_next) ? skb_next->len +
1131                  sizeof(struct txpd) : 0);
1132         ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, skb,
1133                                            &tx_param);
1134         switch (ret) {
1135         case -EBUSY:
1136                 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1137                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1138
1139                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1140                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1141                                                ra_list_flags);
1142                         mwifiex_write_data_complete(adapter, skb, 0, -1);
1143                         return;
1144                 }
1145
1146                 skb_queue_tail(&ptr->skb_head, skb);
1147
1148                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1149                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1150                                        ra_list_flags);
1151                 break;
1152         case -1:
1153                 adapter->data_sent = false;
1154                 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1155                 adapter->dbg.num_tx_host_to_card_failure++;
1156                 mwifiex_write_data_complete(adapter, skb, 0, ret);
1157                 break;
1158         case -EINPROGRESS:
1159                 adapter->data_sent = false;
1160         default:
1161                 break;
1162         }
1163         if (ret != -EBUSY) {
1164                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1165                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1166                         priv->wmm.packets_out[ptr_index]++;
1167                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1168                 }
1169                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1170                         list_first_entry(
1171                                 &adapter->bss_prio_tbl[priv->bss_priority]
1172                                 .bss_prio_cur->list,
1173                                 struct mwifiex_bss_prio_node,
1174                                 list);
1175                 atomic_dec(&priv->wmm.tx_pkts_queued);
1176                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1177                                        ra_list_flags);
1178         }
1179 }
1180
1181 /*
1182  * This function dequeues a packet from the highest priority list
1183  * and transmits it.
1184  */
1185 static int
1186 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1187 {
1188         struct mwifiex_ra_list_tbl *ptr;
1189         struct mwifiex_private *priv = NULL;
1190         int ptr_index = 0;
1191         u8 ra[ETH_ALEN];
1192         int tid_del = 0, tid = 0;
1193         unsigned long flags;
1194
1195         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1196         if (!ptr)
1197                 return -1;
1198
1199         tid = mwifiex_get_tid(ptr);
1200
1201         dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1202
1203         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1204         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1205                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1206                 return -1;
1207         }
1208
1209         if (mwifiex_is_ptr_processed(priv, ptr)) {
1210                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1211                 /* ra_list_spinlock has been freed in
1212                    mwifiex_send_processed_packet() */
1213                 return 0;
1214         }
1215
1216         if (!ptr->is_11n_enabled ||
1217             disable_tx_aggregation ||
1218             mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
1219             priv->wps.session_enable ||
1220             ((priv->sec_info.wpa_enabled ||
1221               priv->sec_info.wpa2_enabled) &&
1222              !priv->wpa_is_gtk_set)) {
1223                 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1224                 /* ra_list_spinlock has been freed in
1225                    mwifiex_send_single_packet() */
1226         } else {
1227                 if (mwifiex_is_ampdu_allowed(priv, tid)) {
1228                         if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1229                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1230                                                       BA_SETUP_INPROGRESS);
1231                                 mwifiex_send_addba(priv, tid, ptr->ra);
1232                         } else if (mwifiex_find_stream_to_delete
1233                                    (priv, tid, &tid_del, ra)) {
1234                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1235                                                       BA_SETUP_INPROGRESS);
1236                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1237                         }
1238                 }
1239                 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1240                     mwifiex_is_11n_aggragation_possible(priv, ptr,
1241                                                         adapter->tx_buf_size))
1242                         mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1243                                                   ptr_index, flags);
1244                         /* ra_list_spinlock has been freed in
1245                            mwifiex_11n_aggregate_pkt() */
1246                 else
1247                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1248                         /* ra_list_spinlock has been freed in
1249                            mwifiex_send_single_packet() */
1250         }
1251         return 0;
1252 }
1253
1254 /*
1255  * This function transmits the highest priority packet awaiting in the
1256  * WMM Queues.
1257  */
1258 void
1259 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1260 {
1261         do {
1262                 /* Check if busy */
1263                 if (adapter->data_sent || adapter->tx_lock_flag)
1264                         break;
1265
1266                 if (mwifiex_dequeue_tx_packet(adapter))
1267                         break;
1268         } while (!mwifiex_wmm_lists_empty(adapter));
1269 }