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_private *priv,
 181                                  u8 queue_priority[])
 182 {
 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
 191 /*
 192  * This function initializes WMM priority queues.
 193  */
 194 void
 195 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
 196                                    struct ieee_types_wmm_parameter *wmm_ie)
 197 {
 198         u16 cw_min, avg_back_off, tmp[4];
 199         u32 i, j, num_ac;
 200         u8 ac_idx;
 201
 202         if (!wmm_ie || !priv->wmm_enabled) {
 203                 /* WMM is not enabled, just set the defaults and return */
 204                 mwifiex_wmm_default_queue_priorities(priv);
 205                 return;
 206         }
 207
 208         dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
 209                 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
 210                 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
 211                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
 212                 wmm_ie->reserved);
 213
 214         for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
 215                 cw_min = (1 << (wmm_ie->ac_params[num_ac].ecw_bitmap &
 216                         MWIFIEX_ECW_MIN)) - 1;
 217                 avg_back_off = (cw_min >> 1) +
 218                         (wmm_ie->ac_params[num_ac].aci_aifsn_bitmap &
 219                         MWIFIEX_AIFSN);
 220
 221                 ac_idx = wmm_aci_to_qidx_map[(wmm_ie->ac_params[num_ac].
 222                                              aci_aifsn_bitmap &
 223                                              MWIFIEX_ACI) >> 5];
 224                 priv->wmm.queue_priority[ac_idx] = ac_idx;
 225                 tmp[ac_idx] = avg_back_off;
 226
 227                 dev_dbg(priv->adapter->dev, "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
 228                        (1 << ((wmm_ie->ac_params[num_ac].ecw_bitmap &
 229                        MWIFIEX_ECW_MAX) >> 4)) - 1,
 230                        cw_min, avg_back_off);
 231                 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
 232         }
 233
 234         /* Bubble sort */
 235         for (i = 0; i < num_ac; i++) {
 236                 for (j = 1; j < num_ac - i; j++) {
 237                         if (tmp[j - 1] > tmp[j]) {
 238                                 swap(tmp[j - 1], tmp[j]);
 239                                 swap(priv->wmm.queue_priority[j - 1],
 240                                      priv->wmm.queue_priority[j]);
 241                         } else if (tmp[j - 1] == tmp[j]) {
 242                                 if (priv->wmm.queue_priority[j - 1]
 243                                     < priv->wmm.queue_priority[j])
 244                                         swap(priv->wmm.queue_priority[j - 1],
 245                                              priv->wmm.queue_priority[j]);
 246                         }
 247                 }
 248         }
 249
 250         mwifiex_wmm_queue_priorities_tid(priv, priv->wmm.queue_priority);
 251 }
 252
 253 /*
 254  * This function evaluates whether or not an AC is to be downgraded.
 255  *
 256  * In case the AC is not enabled, the highest AC is returned that is
 257  * enabled and does not require admission control.
 258  */
 259 static enum mwifiex_wmm_ac_e
 260 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
 261                               enum mwifiex_wmm_ac_e eval_ac)
 262 {
 263         int down_ac;
 264         enum mwifiex_wmm_ac_e ret_ac;
 265         struct mwifiex_wmm_ac_status *ac_status;
 266
 267         ac_status = &priv->wmm.ac_status[eval_ac];
 268
 269         if (!ac_status->disabled)
 270                 /* Okay to use this AC, its enabled */
 271                 return eval_ac;
 272
 273         /* Setup a default return value of the lowest priority */
 274         ret_ac = WMM_AC_BK;
 275
 276         /*
 277          *  Find the highest AC that is enabled and does not require
 278          *  admission control. The spec disallows downgrading to an AC,
 279          *  which is enabled due to a completed admission control.
 280          *  Unadmitted traffic is not to be sent on an AC with admitted
 281          *  traffic.
 282          */
 283         for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
 284                 ac_status = &priv->wmm.ac_status[down_ac];
 285
 286                 if (!ac_status->disabled && !ac_status->flow_required)
 287                         /* AC is enabled and does not require admission
 288                            control */
 289                         ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
 290         }
 291
 292         return ret_ac;
 293 }
 294
 295 /*
 296  * This function downgrades WMM priority queue.
 297  */
 298 void
 299 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
 300 {
 301         int ac_val;
 302
 303         dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
 304                         "BK(0), BE(1), VI(2), VO(3)\n");
 305
 306         if (!priv->wmm_enabled) {
 307                 /* WMM is not enabled, default priorities */
 308                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
 309                         priv->wmm.ac_down_graded_vals[ac_val] =
 310                                 (enum mwifiex_wmm_ac_e) ac_val;
 311         } else {
 312                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
 313                         priv->wmm.ac_down_graded_vals[ac_val]
 314                                 = mwifiex_wmm_eval_downgrade_ac(priv,
 315                                                 (enum mwifiex_wmm_ac_e) ac_val);
 316                         dev_dbg(priv->adapter->dev, "info: WMM: AC PRIO %d maps to %d\n",
 317                                 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
 318                 }
 319         }
 320 }
 321
 322 /*
 323  * This function converts the IP TOS field to an WMM AC
 324  * Queue assignment.
 325  */
 326 static enum mwifiex_wmm_ac_e
 327 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
 328 {
 329         /* Map of TOS UP values to WMM AC */
 330         const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
 331                 WMM_AC_BK,
 332                 WMM_AC_BK,
 333                 WMM_AC_BE,
 334                 WMM_AC_VI,
 335                 WMM_AC_VI,
 336                 WMM_AC_VO,
 337                 WMM_AC_VO
 338         };
 339
 340         if (tos >= ARRAY_SIZE(tos_to_ac))
 341                 return WMM_AC_BE;
 342
 343         return tos_to_ac[tos];
 344 }
 345
 346 /*
 347  * This function evaluates a given TID and downgrades it to a lower
 348  * TID if the WMM Parameter IE received from the AP indicates that the
 349  * AP is disabled (due to call admission control (ACM bit). Mapping
 350  * of TID to AC is taken care of internally.
 351  */
 352 static u8
 353 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
 354 {
 355         enum mwifiex_wmm_ac_e ac, ac_down;
 356         u8 new_tid;
 357
 358         ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
 359         ac_down = priv->wmm.ac_down_graded_vals[ac];
 360
 361         /* Send the index to tid array, picking from the array will be
 362          * taken care by dequeuing function
 363          */
 364         new_tid = ac_to_tid[ac_down][tid % 2];
 365
 366         return new_tid;
 367 }
 368
 369 /*
 370  * This function initializes the WMM state information and the
 371  * WMM data path queues.
 372  */
 373 void
 374 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
 375 {
 376         int i, j;
 377         struct mwifiex_private *priv;
 378
 379         for (j = 0; j < adapter->priv_num; ++j) {
 380                 priv = adapter->priv[j];
 381                 if (!priv)
 382                         continue;
 383
 384                 for (i = 0; i < MAX_NUM_TID; ++i) {
 385                         priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
 386                         priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
 387                         priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
 388                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 389                 }
 390
 391                 priv->aggr_prio_tbl[6].amsdu
 392                         = priv->aggr_prio_tbl[6].ampdu_ap
 393                         = priv->aggr_prio_tbl[6].ampdu_user
 394                         = BA_STREAM_NOT_ALLOWED;
 395
 396                 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
 397                         = priv->aggr_prio_tbl[7].ampdu_user
 398                         = BA_STREAM_NOT_ALLOWED;
 399
 400                 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
 401                 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
 402                 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
 403         }
 404 }
 405
 406 /*
 407  * This function checks if WMM Tx queue is empty.
 408  */
 409 int
 410 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
 411 {
 412         int i, j;
 413         struct mwifiex_private *priv;
 414
 415         for (j = 0; j < adapter->priv_num; ++j) {
 416                 priv = adapter->priv[j];
 417                 if (priv) {
 418                         for (i = 0; i < MAX_NUM_TID; i++)
 419                                 if (!mwifiex_wmm_is_ra_list_empty(adapter,
 420                                              &priv->wmm.tid_tbl_ptr[i].ra_list))
 421                                         return false;
 422                 }
 423         }
 424
 425         return true;
 426 }
 427
 428 /*
 429  * This function deletes all packets in an RA list node.
 430  *
 431  * The packet sent completion callback handler are called with
 432  * status failure, after they are dequeued to ensure proper
 433  * cleanup. The RA list node itself is freed at the end.
 434  */
 435 static void
 436 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
 437                                     struct mwifiex_ra_list_tbl *ra_list)
 438 {
 439         struct mwifiex_adapter *adapter = priv->adapter;
 440         struct sk_buff *skb, *tmp;
 441
 442         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
 443                 mwifiex_write_data_complete(adapter, skb, -1);
 444 }
 445
 446 /*
 447  * This function deletes all packets in an RA list.
 448  *
 449  * Each nodes in the RA list are freed individually first, and then
 450  * the RA list itself is freed.
 451  */
 452 static void
 453 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
 454                                struct list_head *ra_list_head)
 455 {
 456         struct mwifiex_ra_list_tbl *ra_list;
 457
 458         list_for_each_entry(ra_list, ra_list_head, list)
 459                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 460 }
 461
 462 /*
 463  * This function deletes all packets in all RA lists.
 464  */
 465 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
 466 {
 467         int i;
 468
 469         for (i = 0; i < MAX_NUM_TID; i++)
 470                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
 471                                                      ra_list);
 472 }
 473
 474 /*
 475  * This function deletes all route addresses from all RA lists.
 476  */
 477 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 478 {
 479         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
 480         int i;
 481
 482         for (i = 0; i < MAX_NUM_TID; ++i) {
 483                 dev_dbg(priv->adapter->dev,
 484                                 "info: ra_list: freeing buf for tid %d\n", i);
 485                 list_for_each_entry_safe(ra_list, tmp_node,
 486                                 &priv->wmm.tid_tbl_ptr[i].ra_list, list) {
 487                         list_del(&ra_list->list);
 488                         kfree(ra_list);
 489                 }
 490
 491                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
 492
 493                 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 494         }
 495 }
 496
 497 /*
 498  * This function cleans up the Tx and Rx queues.
 499  *
 500  * Cleanup includes -
 501  *      - All packets in RA lists
 502  *      - All entries in Rx reorder table
 503  *      - All entries in Tx BA stream table
 504  *      - MPA buffer (if required)
 505  *      - All RA lists
 506  */
 507 void
 508 mwifiex_clean_txrx(struct mwifiex_private *priv)
 509 {
 510         unsigned long flags;
 511
 512         mwifiex_11n_cleanup_reorder_tbl(priv);
 513         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 514
 515         mwifiex_wmm_cleanup_queues(priv);
 516         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
 517
 518         if (priv->adapter->if_ops.cleanup_mpa_buf)
 519                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
 520
 521         mwifiex_wmm_delete_all_ralist(priv);
 522         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 523
 524         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 525 }
 526
 527 /*
 528  * This function retrieves a particular RA list node, matching with the
 529  * given TID and RA address.
 530  */
 531 static struct mwifiex_ra_list_tbl *
 532 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
 533                             u8 *ra_addr)
 534 {
 535         struct mwifiex_ra_list_tbl *ra_list;
 536
 537         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
 538                             list) {
 539                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
 540                         return ra_list;
 541         }
 542
 543         return NULL;
 544 }
 545
 546 /*
 547  * This function retrieves an RA list node for a given TID and
 548  * RA address pair.
 549  *
 550  * If no such node is found, a new node is added first and then
 551  * retrieved.
 552  */
 553 static struct mwifiex_ra_list_tbl *
 554 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
 555 {
 556         struct mwifiex_ra_list_tbl *ra_list;
 557
 558         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 559         if (ra_list)
 560                 return ra_list;
 561         mwifiex_ralist_add(priv, ra_addr);
 562
 563         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 564 }
 565
 566 /*
 567  * This function checks if a particular RA list node exists in a given TID
 568  * table index.
 569  */
 570 int
 571 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
 572                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
 573 {
 574         struct mwifiex_ra_list_tbl *rlist;
 575
 576         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
 577                             list) {
 578                 if (rlist == ra_list)
 579                         return true;
 580         }
 581
 582         return false;
 583 }
 584
 585 /*
 586  * This function adds a packet to WMM queue.
 587  *
 588  * In disconnected state the packet is immediately dropped and the
 589  * packet send completion callback is called with status failure.
 590  *
 591  * Otherwise, the correct RA list node is located and the packet
 592  * is queued at the list tail.
 593  */
 594 void
 595 mwifiex_wmm_add_buf_txqueue(struct mwifiex_adapter *adapter,
 596                             struct sk_buff *skb)
 597 {
 598         struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
 599         struct mwifiex_private *priv = adapter->priv[tx_info->bss_index];
 600         u32 tid;
 601         struct mwifiex_ra_list_tbl *ra_list;
 602         u8 ra[ETH_ALEN], tid_down;
 603         unsigned long flags;
 604
 605         if (!priv->media_connected) {
 606                 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
 607                 mwifiex_write_data_complete(adapter, skb, -1);
 608                 return;
 609         }
 610
 611         tid = skb->priority;
 612
 613         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 614
 615         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 616
 617         /* In case of infra as we have already created the list during
 618            association we just don't have to call get_queue_raptr, we will
 619            have only 1 raptr for a tid in case of infra */
 620         if (!mwifiex_queuing_ra_based(priv)) {
 621                 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
 622                         ra_list = list_first_entry(
 623                                 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
 624                                 struct mwifiex_ra_list_tbl, list);
 625                 else
 626                         ra_list = NULL;
 627         } else {
 628                 memcpy(ra, skb->data, ETH_ALEN);
 629                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
 630         }
 631
 632         if (!ra_list) {
 633                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 634                 mwifiex_write_data_complete(adapter, skb, -1);
 635                 return;
 636         }
 637
 638         skb_queue_tail(&ra_list->skb_head, skb);
 639
 640         ra_list->total_pkts_size += skb->len;
 641
 642         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 643 }
 644
 645 /*
 646  * This function processes the get WMM status command response from firmware.
 647  *
 648  * The response may contain multiple TLVs -
 649  *      - AC Queue status TLVs
 650  *      - Current WMM Parameter IE TLV
 651  *      - Admission Control action frame TLVs
 652  *
 653  * This function parses the TLVs and then calls further specific functions
 654  * to process any changes in the queue prioritize or state.
 655  */
 656 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
 657                                const struct host_cmd_ds_command *resp)
 658 {
 659         u8 *curr = (u8 *) &resp->params.get_wmm_status;
 660         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
 661         int valid = true;
 662
 663         struct mwifiex_ie_types_data *tlv_hdr;
 664         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
 665         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
 666         struct mwifiex_wmm_ac_status *ac_status;
 667
 668         dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
 669                         resp_len);
 670
 671         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
 672                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
 673                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
 674
 675                 switch (le16_to_cpu(tlv_hdr->header.type)) {
 676                 case TLV_TYPE_WMMQSTATUS:
 677                         tlv_wmm_qstatus =
 678                                 (struct mwifiex_ie_types_wmm_queue_status *)
 679                                 tlv_hdr;
 680                         dev_dbg(priv->adapter->dev,
 681                                 "info: CMD_RESP: WMM_GET_STATUS:"
 682                                 " QSTATUS TLV: %d, %d, %d\n",
 683                                tlv_wmm_qstatus->queue_index,
 684                                tlv_wmm_qstatus->flow_required,
 685                                tlv_wmm_qstatus->disabled);
 686
 687                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
 688                                                          queue_index];
 689                         ac_status->disabled = tlv_wmm_qstatus->disabled;
 690                         ac_status->flow_required =
 691                                 tlv_wmm_qstatus->flow_required;
 692                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
 693                         break;
 694
 695                 case WLAN_EID_VENDOR_SPECIFIC:
 696                         /*
 697                          * Point the regular IEEE IE 2 bytes into the Marvell IE
 698                          *   and setup the IEEE IE type and length byte fields
 699                          */
 700
 701                         wmm_param_ie =
 702                                 (struct ieee_types_wmm_parameter *) (curr +
 703                                                                     2);
 704                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
 705                         wmm_param_ie->vend_hdr.element_id =
 706                                                 WLAN_EID_VENDOR_SPECIFIC;
 707
 708                         dev_dbg(priv->adapter->dev,
 709                                 "info: CMD_RESP: WMM_GET_STATUS:"
 710                                 " WMM Parameter Set Count: %d\n",
 711                                 wmm_param_ie->qos_info_bitmap &
 712                                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
 713
 714                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
 715                                wmm_ie, wmm_param_ie,
 716                                wmm_param_ie->vend_hdr.len + 2);
 717
 718                         break;
 719
 720                 default:
 721                         valid = false;
 722                         break;
 723                 }
 724
 725                 curr += (tlv_len + sizeof(tlv_hdr->header));
 726                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
 727         }
 728
 729         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
 730         mwifiex_wmm_setup_ac_downgrade(priv);
 731
 732         return 0;
 733 }
 734
 735 /*
 736  * Callback handler from the command module to allow insertion of a WMM TLV.
 737  *
 738  * If the BSS we are associating to supports WMM, this function adds the
 739  * required WMM Information IE to the association request command buffer in
 740  * the form of a Marvell extended IEEE IE.
 741  */
 742 u32
 743 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
 744                                     u8 **assoc_buf,
 745                                     struct ieee_types_wmm_parameter *wmm_ie,
 746                                     struct ieee80211_ht_cap *ht_cap)
 747 {
 748         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
 749         u32 ret_len = 0;
 750
 751         /* Null checks */
 752         if (!assoc_buf)
 753                 return 0;
 754         if (!(*assoc_buf))
 755                 return 0;
 756
 757         if (!wmm_ie)
 758                 return 0;
 759
 760         dev_dbg(priv->adapter->dev, "info: WMM: process assoc req:"
 761                         "bss->wmmIe=0x%x\n",
 762                         wmm_ie->vend_hdr.element_id);
 763
 764         if ((priv->wmm_required
 765              || (ht_cap && (priv->adapter->config_bands & BAND_GN
 766                      || priv->adapter->config_bands & BAND_AN))
 767             )
 768             && wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
 769                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
 770                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
 771                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
 772                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
 773                         le16_to_cpu(wmm_tlv->header.len));
 774                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
 775                         memcpy((u8 *) (wmm_tlv->wmm_ie
 776                                         + le16_to_cpu(wmm_tlv->header.len)
 777                                          - sizeof(priv->wmm_qosinfo)),
 778                                         &priv->wmm_qosinfo,
 779                                         sizeof(priv->wmm_qosinfo));
 780
 781                 ret_len = sizeof(wmm_tlv->header)
 782                         + le16_to_cpu(wmm_tlv->header.len);
 783
 784                 *assoc_buf += ret_len;
 785         }
 786
 787         return ret_len;
 788 }
 789
 790 /*
 791  * This function computes the time delay in the driver queues for a
 792  * given packet.
 793  *
 794  * When the packet is received at the OS/Driver interface, the current
 795  * time is set in the packet structure. The difference between the present
 796  * time and that received time is computed in this function and limited
 797  * based on pre-compiled limits in the driver.
 798  */
 799 u8
 800 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
 801                                         const struct sk_buff *skb)
 802 {
 803         u8 ret_val = 0;
 804         struct timeval out_tstamp, in_tstamp;
 805         u32 queue_delay;
 806
 807         do_gettimeofday(&out_tstamp);
 808         in_tstamp = ktime_to_timeval(skb->tstamp);
 809
 810         queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
 811         queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
 812
 813         /*
 814          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
 815          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
 816          *
 817          * Pass max value if queue_delay is beyond the uint8 range
 818          */
 819         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
 820
 821         dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
 822                                 " %d ms sent to FW\n", queue_delay, ret_val);
 823
 824         return ret_val;
 825 }
 826
 827 /*
 828  * This function retrieves the highest priority RA list table pointer.
 829  */
 830 static struct mwifiex_ra_list_tbl *
 831 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 832                                      struct mwifiex_private **priv, int *tid)
 833 {
 834         struct mwifiex_private *priv_tmp;
 835         struct mwifiex_ra_list_tbl *ptr, *head;
 836         struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
 837         struct mwifiex_tid_tbl *tid_ptr;
 838         int is_list_empty;
 839         unsigned long flags;
 840         int i, j;
 841
 842         for (j = adapter->priv_num - 1; j >= 0; --j) {
 843                 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
 844                                 flags);
 845                 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
 846                                 .bss_prio_head);
 847                 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
 848                                 flags);
 849                 if (is_list_empty)
 850                         continue;
 851
 852                 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
 853                     (struct mwifiex_bss_prio_node *)
 854                     &adapter->bss_prio_tbl[j].bss_prio_head) {
 855                         bssprio_node =
 856                                 list_first_entry(&adapter->bss_prio_tbl[j]
 857                                                  .bss_prio_head,
 858                                                  struct mwifiex_bss_prio_node,
 859                                                  list);
 860                         bssprio_head = bssprio_node;
 861                 } else {
 862                         bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
 863                         bssprio_head = bssprio_node;
 864                 }
 865
 866                 do {
 867                         priv_tmp = bssprio_node->priv;
 868
 869                         for (i = HIGH_PRIO_TID; i >= LOW_PRIO_TID; --i) {
 870
 871                                 tid_ptr = &(priv_tmp)->wmm.
 872                                         tid_tbl_ptr[tos_to_tid[i]];
 873
 874                                 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
 875                                                   flags);
 876                                 is_list_empty =
 877                                         list_empty(&adapter->bss_prio_tbl[j]
 878                                                    .bss_prio_head);
 879                                 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
 880                                                        flags);
 881                                 if (is_list_empty)
 882                                         continue;
 883
 884                                 /*
 885                                  * Always choose the next ra we transmitted
 886                                  * last time, this way we pick the ra's in
 887                                  * round robin fashion.
 888                                  */
 889                                 ptr = list_first_entry(
 890                                                 &tid_ptr->ra_list_curr->list,
 891                                                 struct mwifiex_ra_list_tbl,
 892                                                 list);
 893
 894                                 head = ptr;
 895                                 if (ptr == (struct mwifiex_ra_list_tbl *)
 896                                                 &tid_ptr->ra_list) {
 897                                         /* Get next ra */
 898                                         ptr = list_first_entry(&ptr->list,
 899                                             struct mwifiex_ra_list_tbl, list);
 900                                         head = ptr;
 901                                 }
 902
 903                                 do {
 904                                         is_list_empty =
 905                                                 skb_queue_empty(&ptr->skb_head);
 906                                         if (!is_list_empty) {
 907                                                 *priv = priv_tmp;
 908                                                 *tid = tos_to_tid[i];
 909                                                 return ptr;
 910                                         }
 911                                         /* Get next ra */
 912                                         ptr = list_first_entry(&ptr->list,
 913                                                  struct mwifiex_ra_list_tbl,
 914                                                  list);
 915                                         if (ptr ==
 916                                             (struct mwifiex_ra_list_tbl *)
 917                                             &tid_ptr->ra_list)
 918                                                 ptr = list_first_entry(
 919                                                     &ptr->list,
 920                                                     struct mwifiex_ra_list_tbl,
 921                                                     list);
 922                                 } while (ptr != head);
 923                         }
 924
 925                         /* Get next bss priority node */
 926                         bssprio_node = list_first_entry(&bssprio_node->list,
 927                                                 struct mwifiex_bss_prio_node,
 928                                                 list);
 929
 930                         if (bssprio_node ==
 931                             (struct mwifiex_bss_prio_node *)
 932                             &adapter->bss_prio_tbl[j].bss_prio_head)
 933                                 /* Get next bss priority node */
 934                                 bssprio_node = list_first_entry(
 935                                                 &bssprio_node->list,
 936                                                 struct mwifiex_bss_prio_node,
 937                                                 list);
 938                 } while (bssprio_node != bssprio_head);
 939         }
 940         return NULL;
 941 }
 942
 943 /*
 944  * This function gets the number of packets in the Tx queue of a
 945  * particular RA list.
 946  */
 947 static int
 948 mwifiex_num_pkts_in_txq(struct mwifiex_private *priv,
 949                         struct mwifiex_ra_list_tbl *ptr, int max_buf_size)
 950 {
 951         int count = 0, total_size = 0;
 952         struct sk_buff *skb, *tmp;
 953
 954         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
 955                 total_size += skb->len;
 956                 if (total_size < max_buf_size)
 957                         ++count;
 958                 else
 959                         break;
 960         }
 961
 962         return count;
 963 }
 964
 965 /*
 966  * This function sends a single packet to firmware for transmission.
 967  */
 968 static void
 969 mwifiex_send_single_packet(struct mwifiex_private *priv,
 970                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
 971                            unsigned long ra_list_flags)
 972                            __releases(&priv->wmm.ra_list_spinlock)
 973 {
 974         struct sk_buff *skb, *skb_next;
 975         struct mwifiex_tx_param tx_param;
 976         struct mwifiex_adapter *adapter = priv->adapter;
 977         int status = 0;
 978         struct mwifiex_txinfo *tx_info;
 979
 980         if (skb_queue_empty(&ptr->skb_head)) {
 981                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
 982                                        ra_list_flags);
 983                 dev_dbg(adapter->dev, "data: nothing to send\n");
 984                 return;
 985         }
 986
 987         skb = skb_dequeue(&ptr->skb_head);
 988
 989         tx_info = MWIFIEX_SKB_TXCB(skb);
 990         dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
 991
 992         ptr->total_pkts_size -= skb->len;
 993
 994         if (!skb_queue_empty(&ptr->skb_head))
 995                 skb_next = skb_peek(&ptr->skb_head);
 996         else
 997                 skb_next = NULL;
 998
 999         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1000
1001         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1002                                 sizeof(struct txpd) : 0);
1003
1004         status = mwifiex_process_tx(priv, skb, &tx_param);
1005
1006         if (status == -EBUSY) {
1007                 /* Queue the packet back at the head */
1008                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1009
1010                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1011                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1012                                                ra_list_flags);
1013                         mwifiex_write_data_complete(adapter, skb, -1);
1014                         return;
1015                 }
1016
1017                 skb_queue_tail(&ptr->skb_head, skb);
1018
1019                 ptr->total_pkts_size += skb->len;
1020                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1021                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1022                                        ra_list_flags);
1023         } else {
1024                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1025                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1026                         priv->wmm.packets_out[ptr_index]++;
1027                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1028                 }
1029                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1030                         list_first_entry(
1031                                 &adapter->bss_prio_tbl[priv->bss_priority]
1032                                 .bss_prio_cur->list,
1033                                 struct mwifiex_bss_prio_node,
1034                                 list);
1035                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1036                                        ra_list_flags);
1037         }
1038 }
1039
1040 /*
1041  * This function checks if the first packet in the given RA list
1042  * is already processed or not.
1043  */
1044 static int
1045 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1046                          struct mwifiex_ra_list_tbl *ptr)
1047 {
1048         struct sk_buff *skb;
1049         struct mwifiex_txinfo *tx_info;
1050
1051         if (skb_queue_empty(&ptr->skb_head))
1052                 return false;
1053
1054         skb = skb_peek(&ptr->skb_head);
1055
1056         tx_info = MWIFIEX_SKB_TXCB(skb);
1057         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1058                 return true;
1059
1060         return false;
1061 }
1062
1063 /*
1064  * This function sends a single processed packet to firmware for
1065  * transmission.
1066  */
1067 static void
1068 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1069                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1070                               unsigned long ra_list_flags)
1071                                 __releases(&priv->wmm.ra_list_spinlock)
1072 {
1073         struct mwifiex_tx_param tx_param;
1074         struct mwifiex_adapter *adapter = priv->adapter;
1075         int ret = -1;
1076         struct sk_buff *skb, *skb_next;
1077         struct mwifiex_txinfo *tx_info;
1078
1079         if (skb_queue_empty(&ptr->skb_head)) {
1080                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1081                                        ra_list_flags);
1082                 return;
1083         }
1084
1085         skb = skb_dequeue(&ptr->skb_head);
1086
1087         if (!skb_queue_empty(&ptr->skb_head))
1088                 skb_next = skb_peek(&ptr->skb_head);
1089         else
1090                 skb_next = NULL;
1091
1092         tx_info = MWIFIEX_SKB_TXCB(skb);
1093
1094         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1095         tx_param.next_pkt_len =
1096                 ((skb_next) ? skb_next->len +
1097                  sizeof(struct txpd) : 0);
1098         ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1099                                            skb->data, skb->len, &tx_param);
1100         switch (ret) {
1101         case -EBUSY:
1102                 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1103                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1104
1105                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1106                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1107                                                ra_list_flags);
1108                         mwifiex_write_data_complete(adapter, skb, -1);
1109                         return;
1110                 }
1111
1112                 skb_queue_tail(&ptr->skb_head, skb);
1113
1114                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1115                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1116                                        ra_list_flags);
1117                 break;
1118         case -1:
1119                 adapter->data_sent = false;
1120                 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1121                 adapter->dbg.num_tx_host_to_card_failure++;
1122                 mwifiex_write_data_complete(adapter, skb, ret);
1123                 break;
1124         case -EINPROGRESS:
1125                 adapter->data_sent = false;
1126         default:
1127                 break;
1128         }
1129         if (ret != -EBUSY) {
1130                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1131                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1132                         priv->wmm.packets_out[ptr_index]++;
1133                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1134                 }
1135                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1136                         list_first_entry(
1137                                 &adapter->bss_prio_tbl[priv->bss_priority]
1138                                 .bss_prio_cur->list,
1139                                 struct mwifiex_bss_prio_node,
1140                                 list);
1141                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1142                                        ra_list_flags);
1143         }
1144 }
1145
1146 /*
1147  * This function dequeues a packet from the highest priority list
1148  * and transmits it.
1149  */
1150 static int
1151 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1152 {
1153         struct mwifiex_ra_list_tbl *ptr;
1154         struct mwifiex_private *priv = NULL;
1155         int ptr_index = 0;
1156         u8 ra[ETH_ALEN];
1157         int tid_del = 0, tid = 0;
1158         unsigned long flags;
1159
1160         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1161         if (!ptr)
1162                 return -1;
1163
1164         tid = mwifiex_get_tid(priv->adapter, ptr);
1165
1166         dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1167
1168         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1169         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1170                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1171                 return -1;
1172         }
1173
1174         if (mwifiex_is_ptr_processed(priv, ptr)) {
1175                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1176                 /* ra_list_spinlock has been freed in
1177                    mwifiex_send_processed_packet() */
1178                 return 0;
1179         }
1180
1181         if (!ptr->is_11n_enabled || mwifiex_is_ba_stream_setup(priv, ptr, tid)
1182             || ((priv->sec_info.wpa_enabled
1183                   || priv->sec_info.wpa2_enabled) && !priv->wpa_is_gtk_set)
1184                 ) {
1185                 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1186                 /* ra_list_spinlock has been freed in
1187                    mwifiex_send_single_packet() */
1188         } else {
1189                 if (mwifiex_is_ampdu_allowed(priv, ptr, tid)) {
1190                         if (mwifiex_is_ba_stream_avail(priv)) {
1191                                 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1192                                                 ptr->ra, tid,
1193                                                 BA_STREAM_SETUP_INPROGRESS);
1194                                 mwifiex_send_addba(priv, tid, ptr->ra);
1195                         } else if (mwifiex_find_stream_to_delete
1196                                    (priv, ptr, tid, &tid_del, ra)) {
1197                                 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1198                                                 ptr->ra, tid,
1199                                                 BA_STREAM_SETUP_INPROGRESS);
1200                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1201                         }
1202                 }
1203 /* Minimum number of AMSDU */
1204 #define MIN_NUM_AMSDU 2
1205                 if (mwifiex_is_amsdu_allowed(priv, ptr, tid) &&
1206                     (mwifiex_num_pkts_in_txq(priv, ptr, adapter->tx_buf_size) >=
1207                      MIN_NUM_AMSDU))
1208                         mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1209                                                   ptr_index, flags);
1210                         /* ra_list_spinlock has been freed in
1211                            mwifiex_11n_aggregate_pkt() */
1212                 else
1213                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1214                         /* ra_list_spinlock has been freed in
1215                            mwifiex_send_single_packet() */
1216         }
1217         return 0;
1218 }
1219
1220 /*
1221  * This function transmits the highest priority packet awaiting in the
1222  * WMM Queues.
1223  */
1224 void
1225 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1226 {
1227         do {
1228                 /* Check if busy */
1229                 if (adapter->data_sent || adapter->tx_lock_flag)
1230                         break;
1231
1232                 if (mwifiex_dequeue_tx_packet(adapter))
1233                         break;
1234         } while (true);
1235
1236         return;
1237 }