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         if (!ra_list)
 113                 return NULL;
 114
 115         INIT_LIST_HEAD(&ra_list->list);
 116         skb_queue_head_init(&ra_list->skb_head);
 117
 118         memcpy(ra_list->ra, ra, ETH_ALEN);
 119
 120         ra_list->total_pkts_size = 0;
 121
 122         dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list);
 123
 124         return ra_list;
 125 }
 126
 127 /* This function returns random no between 16 and 32 to be used as threshold
 128  * for no of packets after which BA setup is initiated.
 129  */
 130 static u8 mwifiex_get_random_ba_threshold(void)
 131 {
 132         u32 sec, usec;
 133         struct timeval ba_tstamp;
 134         u8 ba_threshold;
 135
 136         /* setup ba_packet_threshold here random number between
 137          * [BA_SETUP_PACKET_OFFSET,
 138          * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
 139          */
 140
 141         do_gettimeofday(&ba_tstamp);
 142         sec = (ba_tstamp.tv_sec & 0xFFFF) + (ba_tstamp.tv_sec >> 16);
 143         usec = (ba_tstamp.tv_usec & 0xFFFF) + (ba_tstamp.tv_usec >> 16);
 144         ba_threshold = (((sec << 16) + usec) % BA_SETUP_MAX_PACKET_THRESHOLD)
 145                                                       + BA_SETUP_PACKET_OFFSET;
 146
 147         return ba_threshold;
 148 }
 149
 150 /*
 151  * This function allocates and adds a RA list for all TIDs
 152  * with the given RA.
 153  */
 154 void
 155 mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
 156 {
 157         int i;
 158         struct mwifiex_ra_list_tbl *ra_list;
 159         struct mwifiex_adapter *adapter = priv->adapter;
 160         struct mwifiex_sta_node *node;
 161         unsigned long flags;
 162
 163         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 164         node = mwifiex_get_sta_entry(priv, ra);
 165         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 166
 167         for (i = 0; i < MAX_NUM_TID; ++i) {
 168                 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
 169                 dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);
 170
 171                 if (!ra_list)
 172                         break;
 173
 174                 ra_list->is_11n_enabled = 0;
 175                 if (!mwifiex_queuing_ra_based(priv)) {
 176                         ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
 177                 } else {
 178                         ra_list->is_11n_enabled =
 179                                       mwifiex_is_sta_11n_enabled(priv, node);
 180                         if (ra_list->is_11n_enabled)
 181                                 ra_list->max_amsdu = node->max_amsdu;
 182                 }
 183
 184                 dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
 185                         ra_list, ra_list->is_11n_enabled);
 186
 187                 if (ra_list->is_11n_enabled) {
 188                         ra_list->pkt_count = 0;
 189                         ra_list->ba_packet_thr =
 190                                               mwifiex_get_random_ba_threshold();
 191                 }
 192                 list_add_tail(&ra_list->list,
 193                               &priv->wmm.tid_tbl_ptr[i].ra_list);
 194
 195                 if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
 196                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
 197         }
 198 }
 199
 200 /*
 201  * This function sets the WMM queue priorities to their default values.
 202  */
 203 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
 204 {
 205         /* Default queue priorities: VO->VI->BE->BK */
 206         priv->wmm.queue_priority[0] = WMM_AC_VO;
 207         priv->wmm.queue_priority[1] = WMM_AC_VI;
 208         priv->wmm.queue_priority[2] = WMM_AC_BE;
 209         priv->wmm.queue_priority[3] = WMM_AC_BK;
 210 }
 211
 212 /*
 213  * This function map ACs to TIDs.
 214  */
 215 static void
 216 mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
 217 {
 218         u8 *queue_priority = wmm->queue_priority;
 219         int i;
 220
 221         for (i = 0; i < 4; ++i) {
 222                 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
 223                 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
 224         }
 225
 226         for (i = 0; i < MAX_NUM_TID; ++i)
 227                 tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
 228
 229         atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
 230 }
 231
 232 /*
 233  * This function initializes WMM priority queues.
 234  */
 235 void
 236 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
 237                                    struct ieee_types_wmm_parameter *wmm_ie)
 238 {
 239         u16 cw_min, avg_back_off, tmp[4];
 240         u32 i, j, num_ac;
 241         u8 ac_idx;
 242
 243         if (!wmm_ie || !priv->wmm_enabled) {
 244                 /* WMM is not enabled, just set the defaults and return */
 245                 mwifiex_wmm_default_queue_priorities(priv);
 246                 return;
 247         }
 248
 249         dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
 250                 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
 251                 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
 252                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
 253                 wmm_ie->reserved);
 254
 255         for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
 256                 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
 257                 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
 258                 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
 259                 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
 260
 261                 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
 262                 priv->wmm.queue_priority[ac_idx] = ac_idx;
 263                 tmp[ac_idx] = avg_back_off;
 264
 265                 dev_dbg(priv->adapter->dev,
 266                         "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
 267                         (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
 268                         cw_min, avg_back_off);
 269                 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
 270         }
 271
 272         /* Bubble sort */
 273         for (i = 0; i < num_ac; i++) {
 274                 for (j = 1; j < num_ac - i; j++) {
 275                         if (tmp[j - 1] > tmp[j]) {
 276                                 swap(tmp[j - 1], tmp[j]);
 277                                 swap(priv->wmm.queue_priority[j - 1],
 278                                      priv->wmm.queue_priority[j]);
 279                         } else if (tmp[j - 1] == tmp[j]) {
 280                                 if (priv->wmm.queue_priority[j - 1]
 281                                     < priv->wmm.queue_priority[j])
 282                                         swap(priv->wmm.queue_priority[j - 1],
 283                                              priv->wmm.queue_priority[j]);
 284                         }
 285                 }
 286         }
 287
 288         mwifiex_wmm_queue_priorities_tid(&priv->wmm);
 289 }
 290
 291 /*
 292  * This function evaluates whether or not an AC is to be downgraded.
 293  *
 294  * In case the AC is not enabled, the highest AC is returned that is
 295  * enabled and does not require admission control.
 296  */
 297 static enum mwifiex_wmm_ac_e
 298 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
 299                               enum mwifiex_wmm_ac_e eval_ac)
 300 {
 301         int down_ac;
 302         enum mwifiex_wmm_ac_e ret_ac;
 303         struct mwifiex_wmm_ac_status *ac_status;
 304
 305         ac_status = &priv->wmm.ac_status[eval_ac];
 306
 307         if (!ac_status->disabled)
 308                 /* Okay to use this AC, its enabled */
 309                 return eval_ac;
 310
 311         /* Setup a default return value of the lowest priority */
 312         ret_ac = WMM_AC_BK;
 313
 314         /*
 315          *  Find the highest AC that is enabled and does not require
 316          *  admission control. The spec disallows downgrading to an AC,
 317          *  which is enabled due to a completed admission control.
 318          *  Unadmitted traffic is not to be sent on an AC with admitted
 319          *  traffic.
 320          */
 321         for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
 322                 ac_status = &priv->wmm.ac_status[down_ac];
 323
 324                 if (!ac_status->disabled && !ac_status->flow_required)
 325                         /* AC is enabled and does not require admission
 326                            control */
 327                         ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
 328         }
 329
 330         return ret_ac;
 331 }
 332
 333 /*
 334  * This function downgrades WMM priority queue.
 335  */
 336 void
 337 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
 338 {
 339         int ac_val;
 340
 341         dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
 342                         "BK(0), BE(1), VI(2), VO(3)\n");
 343
 344         if (!priv->wmm_enabled) {
 345                 /* WMM is not enabled, default priorities */
 346                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
 347                         priv->wmm.ac_down_graded_vals[ac_val] =
 348                                                 (enum mwifiex_wmm_ac_e) ac_val;
 349         } else {
 350                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
 351                         priv->wmm.ac_down_graded_vals[ac_val]
 352                                 = mwifiex_wmm_eval_downgrade_ac(priv,
 353                                                 (enum mwifiex_wmm_ac_e) ac_val);
 354                         dev_dbg(priv->adapter->dev,
 355                                 "info: WMM: AC PRIO %d maps to %d\n",
 356                                 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
 357                 }
 358         }
 359 }
 360
 361 /*
 362  * This function converts the IP TOS field to an WMM AC
 363  * Queue assignment.
 364  */
 365 static enum mwifiex_wmm_ac_e
 366 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
 367 {
 368         /* Map of TOS UP values to WMM AC */
 369         const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
 370                 WMM_AC_BK,
 371                 WMM_AC_BK,
 372                 WMM_AC_BE,
 373                 WMM_AC_VI,
 374                 WMM_AC_VI,
 375                 WMM_AC_VO,
 376                 WMM_AC_VO
 377         };
 378
 379         if (tos >= ARRAY_SIZE(tos_to_ac))
 380                 return WMM_AC_BE;
 381
 382         return tos_to_ac[tos];
 383 }
 384
 385 /*
 386  * This function evaluates a given TID and downgrades it to a lower
 387  * TID if the WMM Parameter IE received from the AP indicates that the
 388  * AP is disabled (due to call admission control (ACM bit). Mapping
 389  * of TID to AC is taken care of internally.
 390  */
 391 static u8
 392 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
 393 {
 394         enum mwifiex_wmm_ac_e ac, ac_down;
 395         u8 new_tid;
 396
 397         ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
 398         ac_down = priv->wmm.ac_down_graded_vals[ac];
 399
 400         /* Send the index to tid array, picking from the array will be
 401          * taken care by dequeuing function
 402          */
 403         new_tid = ac_to_tid[ac_down][tid % 2];
 404
 405         return new_tid;
 406 }
 407
 408 /*
 409  * This function initializes the WMM state information and the
 410  * WMM data path queues.
 411  */
 412 void
 413 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
 414 {
 415         int i, j;
 416         struct mwifiex_private *priv;
 417
 418         for (j = 0; j < adapter->priv_num; ++j) {
 419                 priv = adapter->priv[j];
 420                 if (!priv)
 421                         continue;
 422
 423                 for (i = 0; i < MAX_NUM_TID; ++i) {
 424                         priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
 425                         priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
 426                         priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
 427                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 428                 }
 429
 430                 priv->aggr_prio_tbl[6].amsdu
 431                                         = priv->aggr_prio_tbl[6].ampdu_ap
 432                                         = priv->aggr_prio_tbl[6].ampdu_user
 433                                         = BA_STREAM_NOT_ALLOWED;
 434
 435                 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
 436                                         = priv->aggr_prio_tbl[7].ampdu_user
 437                                         = BA_STREAM_NOT_ALLOWED;
 438
 439                 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
 440                 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
 441                 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
 442
 443                 mwifiex_reset_11n_rx_seq_num(priv);
 444
 445                 atomic_set(&priv->wmm.tx_pkts_queued, 0);
 446                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 447         }
 448 }
 449
 450 /*
 451  * This function checks if WMM Tx queue is empty.
 452  */
 453 int
 454 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
 455 {
 456         int i;
 457         struct mwifiex_private *priv;
 458
 459         for (i = 0; i < adapter->priv_num; ++i) {
 460                 priv = adapter->priv[i];
 461                 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
 462                         return false;
 463         }
 464
 465         return true;
 466 }
 467
 468 /*
 469  * This function deletes all packets in an RA list node.
 470  *
 471  * The packet sent completion callback handler are called with
 472  * status failure, after they are dequeued to ensure proper
 473  * cleanup. The RA list node itself is freed at the end.
 474  */
 475 static void
 476 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
 477                                     struct mwifiex_ra_list_tbl *ra_list)
 478 {
 479         struct mwifiex_adapter *adapter = priv->adapter;
 480         struct sk_buff *skb, *tmp;
 481
 482         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
 483                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 484 }
 485
 486 /*
 487  * This function deletes all packets in an RA list.
 488  *
 489  * Each nodes in the RA list are freed individually first, and then
 490  * the RA list itself is freed.
 491  */
 492 static void
 493 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
 494                                struct list_head *ra_list_head)
 495 {
 496         struct mwifiex_ra_list_tbl *ra_list;
 497
 498         list_for_each_entry(ra_list, ra_list_head, list)
 499                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 500 }
 501
 502 /*
 503  * This function deletes all packets in all RA lists.
 504  */
 505 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
 506 {
 507         int i;
 508
 509         for (i = 0; i < MAX_NUM_TID; i++)
 510                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
 511                                                                        ra_list);
 512
 513         atomic_set(&priv->wmm.tx_pkts_queued, 0);
 514         atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 515 }
 516
 517 /*
 518  * This function deletes all route addresses from all RA lists.
 519  */
 520 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 521 {
 522         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
 523         int i;
 524
 525         for (i = 0; i < MAX_NUM_TID; ++i) {
 526                 dev_dbg(priv->adapter->dev,
 527                         "info: ra_list: freeing buf for tid %d\n", i);
 528                 list_for_each_entry_safe(ra_list, tmp_node,
 529                                          &priv->wmm.tid_tbl_ptr[i].ra_list,
 530                                          list) {
 531                         list_del(&ra_list->list);
 532                         kfree(ra_list);
 533                 }
 534
 535                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
 536
 537                 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
 538         }
 539 }
 540
 541 /*
 542  * This function cleans up the Tx and Rx queues.
 543  *
 544  * Cleanup includes -
 545  *      - All packets in RA lists
 546  *      - All entries in Rx reorder table
 547  *      - All entries in Tx BA stream table
 548  *      - MPA buffer (if required)
 549  *      - All RA lists
 550  */
 551 void
 552 mwifiex_clean_txrx(struct mwifiex_private *priv)
 553 {
 554         unsigned long flags;
 555
 556         mwifiex_11n_cleanup_reorder_tbl(priv);
 557         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 558
 559         mwifiex_wmm_cleanup_queues(priv);
 560         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
 561
 562         if (priv->adapter->if_ops.cleanup_mpa_buf)
 563                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
 564
 565         mwifiex_wmm_delete_all_ralist(priv);
 566         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 567
 568         if (priv->adapter->if_ops.clean_pcie_ring)
 569                 priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
 570         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 571 }
 572
 573 /*
 574  * This function retrieves a particular RA list node, matching with the
 575  * given TID and RA address.
 576  */
 577 static struct mwifiex_ra_list_tbl *
 578 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
 579                             u8 *ra_addr)
 580 {
 581         struct mwifiex_ra_list_tbl *ra_list;
 582
 583         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
 584                             list) {
 585                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
 586                         return ra_list;
 587         }
 588
 589         return NULL;
 590 }
 591
 592 /*
 593  * This function retrieves an RA list node for a given TID and
 594  * RA address pair.
 595  *
 596  * If no such node is found, a new node is added first and then
 597  * retrieved.
 598  */
 599 static struct mwifiex_ra_list_tbl *
 600 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
 601 {
 602         struct mwifiex_ra_list_tbl *ra_list;
 603
 604         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 605         if (ra_list)
 606                 return ra_list;
 607         mwifiex_ralist_add(priv, ra_addr);
 608
 609         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 610 }
 611
 612 /*
 613  * This function checks if a particular RA list node exists in a given TID
 614  * table index.
 615  */
 616 int
 617 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
 618                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
 619 {
 620         struct mwifiex_ra_list_tbl *rlist;
 621
 622         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
 623                             list) {
 624                 if (rlist == ra_list)
 625                         return true;
 626         }
 627
 628         return false;
 629 }
 630
 631 /*
 632  * This function adds a packet to WMM queue.
 633  *
 634  * In disconnected state the packet is immediately dropped and the
 635  * packet send completion callback is called with status failure.
 636  *
 637  * Otherwise, the correct RA list node is located and the packet
 638  * is queued at the list tail.
 639  */
 640 void
 641 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
 642                             struct sk_buff *skb)
 643 {
 644         struct mwifiex_adapter *adapter = priv->adapter;
 645         u32 tid;
 646         struct mwifiex_ra_list_tbl *ra_list;
 647         u8 ra[ETH_ALEN], tid_down;
 648         unsigned long flags;
 649
 650         if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
 651                 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
 652                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 653                 return;
 654         }
 655
 656         tid = skb->priority;
 657
 658         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 659
 660         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 661
 662         /* In case of infra as we have already created the list during
 663            association we just don't have to call get_queue_raptr, we will
 664            have only 1 raptr for a tid in case of infra */
 665         if (!mwifiex_queuing_ra_based(priv) &&
 666             !mwifiex_is_skb_mgmt_frame(skb)) {
 667                 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
 668                         ra_list = list_first_entry(
 669                                 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
 670                                 struct mwifiex_ra_list_tbl, list);
 671                 else
 672                         ra_list = NULL;
 673         } else {
 674                 memcpy(ra, skb->data, ETH_ALEN);
 675                 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
 676                         memset(ra, 0xff, ETH_ALEN);
 677                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
 678         }
 679
 680         if (!ra_list) {
 681                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 682                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 683                 return;
 684         }
 685
 686         skb_queue_tail(&ra_list->skb_head, skb);
 687
 688         ra_list->total_pkts_size += skb->len;
 689         ra_list->pkt_count++;
 690
 691         atomic_inc(&priv->wmm.tx_pkts_queued);
 692
 693         if (atomic_read(&priv->wmm.highest_queued_prio) <
 694                                                 tos_to_tid_inv[tid_down])
 695                 atomic_set(&priv->wmm.highest_queued_prio,
 696                            tos_to_tid_inv[tid_down]);
 697
 698         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 699 }
 700
 701 /*
 702  * This function processes the get WMM status command response from firmware.
 703  *
 704  * The response may contain multiple TLVs -
 705  *      - AC Queue status TLVs
 706  *      - Current WMM Parameter IE TLV
 707  *      - Admission Control action frame TLVs
 708  *
 709  * This function parses the TLVs and then calls further specific functions
 710  * to process any changes in the queue prioritize or state.
 711  */
 712 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
 713                                const struct host_cmd_ds_command *resp)
 714 {
 715         u8 *curr = (u8 *) &resp->params.get_wmm_status;
 716         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
 717         int valid = true;
 718
 719         struct mwifiex_ie_types_data *tlv_hdr;
 720         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
 721         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
 722         struct mwifiex_wmm_ac_status *ac_status;
 723
 724         dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
 725                 resp_len);
 726
 727         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
 728                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
 729                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
 730
 731                 switch (le16_to_cpu(tlv_hdr->header.type)) {
 732                 case TLV_TYPE_WMMQSTATUS:
 733                         tlv_wmm_qstatus =
 734                                 (struct mwifiex_ie_types_wmm_queue_status *)
 735                                 tlv_hdr;
 736                         dev_dbg(priv->adapter->dev,
 737                                 "info: CMD_RESP: WMM_GET_STATUS:"
 738                                 " QSTATUS TLV: %d, %d, %d\n",
 739                                 tlv_wmm_qstatus->queue_index,
 740                                 tlv_wmm_qstatus->flow_required,
 741                                 tlv_wmm_qstatus->disabled);
 742
 743                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
 744                                                          queue_index];
 745                         ac_status->disabled = tlv_wmm_qstatus->disabled;
 746                         ac_status->flow_required =
 747                                                 tlv_wmm_qstatus->flow_required;
 748                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
 749                         break;
 750
 751                 case WLAN_EID_VENDOR_SPECIFIC:
 752                         /*
 753                          * Point the regular IEEE IE 2 bytes into the Marvell IE
 754                          *   and setup the IEEE IE type and length byte fields
 755                          */
 756
 757                         wmm_param_ie =
 758                                 (struct ieee_types_wmm_parameter *) (curr +
 759                                                                     2);
 760                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
 761                         wmm_param_ie->vend_hdr.element_id =
 762                                                 WLAN_EID_VENDOR_SPECIFIC;
 763
 764                         dev_dbg(priv->adapter->dev,
 765                                 "info: CMD_RESP: WMM_GET_STATUS:"
 766                                 " WMM Parameter Set Count: %d\n",
 767                                 wmm_param_ie->qos_info_bitmap &
 768                                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
 769
 770                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
 771                                wmm_ie, wmm_param_ie,
 772                                wmm_param_ie->vend_hdr.len + 2);
 773
 774                         break;
 775
 776                 default:
 777                         valid = false;
 778                         break;
 779                 }
 780
 781                 curr += (tlv_len + sizeof(tlv_hdr->header));
 782                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
 783         }
 784
 785         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
 786         mwifiex_wmm_setup_ac_downgrade(priv);
 787
 788         return 0;
 789 }
 790
 791 /*
 792  * Callback handler from the command module to allow insertion of a WMM TLV.
 793  *
 794  * If the BSS we are associating to supports WMM, this function adds the
 795  * required WMM Information IE to the association request command buffer in
 796  * the form of a Marvell extended IEEE IE.
 797  */
 798 u32
 799 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
 800                                     u8 **assoc_buf,
 801                                     struct ieee_types_wmm_parameter *wmm_ie,
 802                                     struct ieee80211_ht_cap *ht_cap)
 803 {
 804         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
 805         u32 ret_len = 0;
 806
 807         /* Null checks */
 808         if (!assoc_buf)
 809                 return 0;
 810         if (!(*assoc_buf))
 811                 return 0;
 812
 813         if (!wmm_ie)
 814                 return 0;
 815
 816         dev_dbg(priv->adapter->dev,
 817                 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
 818                 wmm_ie->vend_hdr.element_id);
 819
 820         if ((priv->wmm_required ||
 821              (ht_cap && (priv->adapter->config_bands & BAND_GN ||
 822              priv->adapter->config_bands & BAND_AN))) &&
 823             wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
 824                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
 825                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
 826                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
 827                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
 828                        le16_to_cpu(wmm_tlv->header.len));
 829                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
 830                         memcpy((u8 *) (wmm_tlv->wmm_ie
 831                                        + le16_to_cpu(wmm_tlv->header.len)
 832                                        - sizeof(priv->wmm_qosinfo)),
 833                                &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
 834
 835                 ret_len = sizeof(wmm_tlv->header)
 836                           + le16_to_cpu(wmm_tlv->header.len);
 837
 838                 *assoc_buf += ret_len;
 839         }
 840
 841         return ret_len;
 842 }
 843
 844 /*
 845  * This function computes the time delay in the driver queues for a
 846  * given packet.
 847  *
 848  * When the packet is received at the OS/Driver interface, the current
 849  * time is set in the packet structure. The difference between the present
 850  * time and that received time is computed in this function and limited
 851  * based on pre-compiled limits in the driver.
 852  */
 853 u8
 854 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
 855                                   const struct sk_buff *skb)
 856 {
 857         u8 ret_val;
 858         struct timeval out_tstamp, in_tstamp;
 859         u32 queue_delay;
 860
 861         do_gettimeofday(&out_tstamp);
 862         in_tstamp = ktime_to_timeval(skb->tstamp);
 863
 864         queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
 865         queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
 866
 867         /*
 868          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
 869          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
 870          *
 871          * Pass max value if queue_delay is beyond the uint8 range
 872          */
 873         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
 874
 875         dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
 876                                 " %d ms sent to FW\n", queue_delay, ret_val);
 877
 878         return ret_val;
 879 }
 880
 881 /*
 882  * This function retrieves the highest priority RA list table pointer.
 883  */
 884 static struct mwifiex_ra_list_tbl *
 885 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 886                                      struct mwifiex_private **priv, int *tid)
 887 {
 888         struct mwifiex_private *priv_tmp;
 889         struct mwifiex_ra_list_tbl *ptr, *head;
 890         struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
 891         struct mwifiex_tid_tbl *tid_ptr;
 892         atomic_t *hqp;
 893         int is_list_empty;
 894         unsigned long flags;
 895         int i, j;
 896
 897         for (j = adapter->priv_num - 1; j >= 0; --j) {
 898                 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
 899                                   flags);
 900                 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
 901                                            .bss_prio_head);
 902                 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
 903                                        flags);
 904                 if (is_list_empty)
 905                         continue;
 906
 907                 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
 908                     (struct mwifiex_bss_prio_node *)
 909                     &adapter->bss_prio_tbl[j].bss_prio_head) {
 910                         adapter->bss_prio_tbl[j].bss_prio_cur =
 911                                 list_first_entry(&adapter->bss_prio_tbl[j]
 912                                                  .bss_prio_head,
 913                                                  struct mwifiex_bss_prio_node,
 914                                                  list);
 915                 }
 916
 917                 bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
 918                 bssprio_head = bssprio_node;
 919
 920                 do {
 921                         priv_tmp = bssprio_node->priv;
 922                         hqp = &priv_tmp->wmm.highest_queued_prio;
 923
 924                         for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
 925
 926                                 tid_ptr = &(priv_tmp)->wmm.
 927                                         tid_tbl_ptr[tos_to_tid[i]];
 928
 929                                 /* For non-STA ra_list_curr may be NULL */
 930                                 if (!tid_ptr->ra_list_curr)
 931                                         continue;
 932
 933                                 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
 934                                                   flags);
 935                                 is_list_empty =
 936                                         list_empty(&adapter->bss_prio_tbl[j]
 937                                                    .bss_prio_head);
 938                                 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
 939                                                        flags);
 940                                 if (is_list_empty)
 941                                         continue;
 942
 943                                 /*
 944                                  * Always choose the next ra we transmitted
 945                                  * last time, this way we pick the ra's in
 946                                  * round robin fashion.
 947                                  */
 948                                 ptr = list_first_entry(
 949                                                 &tid_ptr->ra_list_curr->list,
 950                                                 struct mwifiex_ra_list_tbl,
 951                                                 list);
 952
 953                                 head = ptr;
 954                                 if (ptr == (struct mwifiex_ra_list_tbl *)
 955                                                 &tid_ptr->ra_list) {
 956                                         /* Get next ra */
 957                                         ptr = list_first_entry(&ptr->list,
 958                                             struct mwifiex_ra_list_tbl, list);
 959                                         head = ptr;
 960                                 }
 961
 962                                 do {
 963                                         is_list_empty =
 964                                                 skb_queue_empty(&ptr->skb_head);
 965
 966                                         if (!is_list_empty)
 967                                                 goto found;
 968
 969                                         /* Get next ra */
 970                                         ptr = list_first_entry(&ptr->list,
 971                                                  struct mwifiex_ra_list_tbl,
 972                                                  list);
 973                                         if (ptr ==
 974                                             (struct mwifiex_ra_list_tbl *)
 975                                             &tid_ptr->ra_list)
 976                                                 ptr = list_first_entry(
 977                                                     &ptr->list,
 978                                                     struct mwifiex_ra_list_tbl,
 979                                                     list);
 980                                 } while (ptr != head);
 981                         }
 982
 983                         /* No packet at any TID for this priv. Mark as such
 984                          * to skip checking TIDs for this priv (until pkt is
 985                          * added).
 986                          */
 987                         atomic_set(hqp, NO_PKT_PRIO_TID);
 988
 989                         /* Get next bss priority node */
 990                         bssprio_node = list_first_entry(&bssprio_node->list,
 991                                                 struct mwifiex_bss_prio_node,
 992                                                 list);
 993
 994                         if (bssprio_node ==
 995                             (struct mwifiex_bss_prio_node *)
 996                             &adapter->bss_prio_tbl[j].bss_prio_head)
 997                                 /* Get next bss priority node */
 998                                 bssprio_node = list_first_entry(
 999                                                 &bssprio_node->list,
1000                                                 struct mwifiex_bss_prio_node,
1001                                                 list);
1002                 } while (bssprio_node != bssprio_head);
1003         }
1004         return NULL;
1005
1006 found:
1007         spin_lock_irqsave(&priv_tmp->wmm.ra_list_spinlock, flags);
1008         if (atomic_read(hqp) > i)
1009                 atomic_set(hqp, i);
1010         spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags);
1011
1012         *priv = priv_tmp;
1013         *tid = tos_to_tid[i];
1014
1015         return ptr;
1016 }
1017
1018 /*
1019  * This function checks if 11n aggregation is possible.
1020  */
1021 static int
1022 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
1023                                     struct mwifiex_ra_list_tbl *ptr,
1024                                     int max_buf_size)
1025 {
1026         int count = 0, total_size = 0;
1027         struct sk_buff *skb, *tmp;
1028         int max_amsdu_size;
1029
1030         if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled &&
1031             ptr->is_11n_enabled)
1032                 max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
1033         else
1034                 max_amsdu_size = max_buf_size;
1035
1036         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
1037                 total_size += skb->len;
1038                 if (total_size >= max_amsdu_size)
1039                         break;
1040                 if (++count >= MIN_NUM_AMSDU)
1041                         return true;
1042         }
1043
1044         return false;
1045 }
1046
1047 /*
1048  * This function sends a single packet to firmware for transmission.
1049  */
1050 static void
1051 mwifiex_send_single_packet(struct mwifiex_private *priv,
1052                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1053                            unsigned long ra_list_flags)
1054                            __releases(&priv->wmm.ra_list_spinlock)
1055 {
1056         struct sk_buff *skb, *skb_next;
1057         struct mwifiex_tx_param tx_param;
1058         struct mwifiex_adapter *adapter = priv->adapter;
1059         struct mwifiex_txinfo *tx_info;
1060
1061         if (skb_queue_empty(&ptr->skb_head)) {
1062                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1063                                        ra_list_flags);
1064                 dev_dbg(adapter->dev, "data: nothing to send\n");
1065                 return;
1066         }
1067
1068         skb = skb_dequeue(&ptr->skb_head);
1069
1070         tx_info = MWIFIEX_SKB_TXCB(skb);
1071         dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1072
1073         ptr->total_pkts_size -= skb->len;
1074
1075         if (!skb_queue_empty(&ptr->skb_head))
1076                 skb_next = skb_peek(&ptr->skb_head);
1077         else
1078                 skb_next = NULL;
1079
1080         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1081
1082         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1083                                 sizeof(struct txpd) : 0);
1084
1085         if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1086                 /* Queue the packet back at the head */
1087                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1088
1089                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1090                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1091                                                ra_list_flags);
1092                         mwifiex_write_data_complete(adapter, skb, 0, -1);
1093                         return;
1094                 }
1095
1096                 skb_queue_tail(&ptr->skb_head, skb);
1097
1098                 ptr->total_pkts_size += skb->len;
1099                 ptr->pkt_count++;
1100                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1101                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1102                                        ra_list_flags);
1103         } else {
1104                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1105                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1106                         priv->wmm.packets_out[ptr_index]++;
1107                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1108                 }
1109                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1110                         list_first_entry(
1111                                 &adapter->bss_prio_tbl[priv->bss_priority]
1112                                 .bss_prio_cur->list,
1113                                 struct mwifiex_bss_prio_node,
1114                                 list);
1115                 atomic_dec(&priv->wmm.tx_pkts_queued);
1116                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1117                                        ra_list_flags);
1118         }
1119 }
1120
1121 /*
1122  * This function checks if the first packet in the given RA list
1123  * is already processed or not.
1124  */
1125 static int
1126 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1127                          struct mwifiex_ra_list_tbl *ptr)
1128 {
1129         struct sk_buff *skb;
1130         struct mwifiex_txinfo *tx_info;
1131
1132         if (skb_queue_empty(&ptr->skb_head))
1133                 return false;
1134
1135         skb = skb_peek(&ptr->skb_head);
1136
1137         tx_info = MWIFIEX_SKB_TXCB(skb);
1138         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1139                 return true;
1140
1141         return false;
1142 }
1143
1144 /*
1145  * This function sends a single processed packet to firmware for
1146  * transmission.
1147  */
1148 static void
1149 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1150                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1151                               unsigned long ra_list_flags)
1152                                 __releases(&priv->wmm.ra_list_spinlock)
1153 {
1154         struct mwifiex_tx_param tx_param;
1155         struct mwifiex_adapter *adapter = priv->adapter;
1156         int ret = -1;
1157         struct sk_buff *skb, *skb_next;
1158         struct mwifiex_txinfo *tx_info;
1159
1160         if (skb_queue_empty(&ptr->skb_head)) {
1161                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1162                                        ra_list_flags);
1163                 return;
1164         }
1165
1166         skb = skb_dequeue(&ptr->skb_head);
1167
1168         if (!skb_queue_empty(&ptr->skb_head))
1169                 skb_next = skb_peek(&ptr->skb_head);
1170         else
1171                 skb_next = NULL;
1172
1173         tx_info = MWIFIEX_SKB_TXCB(skb);
1174
1175         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1176
1177         if (adapter->iface_type == MWIFIEX_USB) {
1178                 adapter->data_sent = true;
1179                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
1180                                                    skb, NULL);
1181         } else {
1182                 tx_param.next_pkt_len =
1183                         ((skb_next) ? skb_next->len +
1184                          sizeof(struct txpd) : 0);
1185                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1186                                                    skb, &tx_param);
1187         }
1188
1189         switch (ret) {
1190         case -EBUSY:
1191                 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1192                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1193
1194                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1195                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1196                                                ra_list_flags);
1197                         mwifiex_write_data_complete(adapter, skb, 0, -1);
1198                         return;
1199                 }
1200
1201                 skb_queue_tail(&ptr->skb_head, skb);
1202
1203                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1204                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1205                                        ra_list_flags);
1206                 break;
1207         case -1:
1208                 if (adapter->iface_type != MWIFIEX_PCIE)
1209                         adapter->data_sent = false;
1210                 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1211                 adapter->dbg.num_tx_host_to_card_failure++;
1212                 mwifiex_write_data_complete(adapter, skb, 0, ret);
1213                 break;
1214         case -EINPROGRESS:
1215                 if (adapter->iface_type != MWIFIEX_PCIE)
1216                         adapter->data_sent = false;
1217         default:
1218                 break;
1219         }
1220         if (ret != -EBUSY) {
1221                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1222                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1223                         priv->wmm.packets_out[ptr_index]++;
1224                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1225                 }
1226                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1227                         list_first_entry(
1228                                 &adapter->bss_prio_tbl[priv->bss_priority]
1229                                 .bss_prio_cur->list,
1230                                 struct mwifiex_bss_prio_node,
1231                                 list);
1232                 atomic_dec(&priv->wmm.tx_pkts_queued);
1233                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1234                                        ra_list_flags);
1235         }
1236 }
1237
1238 /*
1239  * This function dequeues a packet from the highest priority list
1240  * and transmits it.
1241  */
1242 static int
1243 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1244 {
1245         struct mwifiex_ra_list_tbl *ptr;
1246         struct mwifiex_private *priv = NULL;
1247         int ptr_index = 0;
1248         u8 ra[ETH_ALEN];
1249         int tid_del = 0, tid = 0;
1250         unsigned long flags;
1251
1252         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1253         if (!ptr)
1254                 return -1;
1255
1256         tid = mwifiex_get_tid(ptr);
1257
1258         dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1259
1260         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1261         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1262                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1263                 return -1;
1264         }
1265
1266         if (mwifiex_is_ptr_processed(priv, ptr)) {
1267                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1268                 /* ra_list_spinlock has been freed in
1269                    mwifiex_send_processed_packet() */
1270                 return 0;
1271         }
1272
1273         if (!ptr->is_11n_enabled ||
1274             mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
1275             priv->wps.session_enable ||
1276             ((priv->sec_info.wpa_enabled ||
1277               priv->sec_info.wpa2_enabled) &&
1278              !priv->wpa_is_gtk_set)) {
1279                 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1280                 /* ra_list_spinlock has been freed in
1281                    mwifiex_send_single_packet() */
1282         } else {
1283                 if (mwifiex_is_ampdu_allowed(priv, tid) &&
1284                     ptr->pkt_count > ptr->ba_packet_thr) {
1285                         if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1286                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1287                                                       BA_SETUP_INPROGRESS);
1288                                 mwifiex_send_addba(priv, tid, ptr->ra);
1289                         } else if (mwifiex_find_stream_to_delete
1290                                    (priv, tid, &tid_del, ra)) {
1291                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1292                                                       BA_SETUP_INPROGRESS);
1293                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1294                         }
1295                 }
1296                 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1297                     mwifiex_is_11n_aggragation_possible(priv, ptr,
1298                                                         adapter->tx_buf_size))
1299                         mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1300                                                   ptr_index, flags);
1301                         /* ra_list_spinlock has been freed in
1302                            mwifiex_11n_aggregate_pkt() */
1303                 else
1304                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1305                         /* ra_list_spinlock has been freed in
1306                            mwifiex_send_single_packet() */
1307         }
1308         return 0;
1309 }
1310
1311 /*
1312  * This function transmits the highest priority packet awaiting in the
1313  * WMM Queues.
1314  */
1315 void
1316 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1317 {
1318         do {
1319                 /* Check if busy */
1320                 if (adapter->data_sent || adapter->tx_lock_flag)
1321                         break;
1322
1323                 if (mwifiex_dequeue_tx_packet(adapter))
1324                         break;
1325         } while (!mwifiex_wmm_lists_empty(adapter));
1326 }