drivers/net/wireless/mwifiex/wmm.c

   1 /*
   2  * Marvell Wireless LAN device driver: WMM
   3  *
   4  * Copyright (C) 2011-2014, 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 static bool disable_tx_amsdu;
  41 module_param(disable_tx_amsdu, bool, 0644);
  42
  43 /* WMM information IE */
  44 static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
  45         0x00, 0x50, 0xf2, 0x02,
  46         0x00, 0x01, 0x00
  47 };
  48
  49 static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
  50         WMM_AC_BK,
  51         WMM_AC_VI,
  52         WMM_AC_VO
  53 };
  54
  55 static u8 tos_to_tid[] = {
  56         /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */
  57         0x01,                   /* 0 1 0 AC_BK */
  58         0x02,                   /* 0 0 0 AC_BK */
  59         0x00,                   /* 0 0 1 AC_BE */
  60         0x03,                   /* 0 1 1 AC_BE */
  61         0x04,                   /* 1 0 0 AC_VI */
  62         0x05,                   /* 1 0 1 AC_VI */
  63         0x06,                   /* 1 1 0 AC_VO */
  64         0x07                    /* 1 1 1 AC_VO */
  65 };
  66
  67 static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} };
  68
  69 /*
  70  * This function debug prints the priority parameters for a WMM AC.
  71  */
  72 static void
  73 mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param)
  74 {
  75         const char *ac_str[] = { "BK", "BE", "VI", "VO" };
  76
  77         pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, "
  78                  "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
  79                  ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap
  80                                              & MWIFIEX_ACI) >> 5]],
  81                  (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5,
  82                  (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4,
  83                  ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN,
  84                  ac_param->ecw_bitmap & MWIFIEX_ECW_MIN,
  85                  (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4,
  86                  le16_to_cpu(ac_param->tx_op_limit));
  87 }
  88
  89 /*
  90  * This function allocates a route address list.
  91  *
  92  * The function also initializes the list with the provided RA.
  93  */
  94 static struct mwifiex_ra_list_tbl *
  95 mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, const u8 *ra)
  96 {
  97         struct mwifiex_ra_list_tbl *ra_list;
  98
  99         ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC);
 100         if (!ra_list)
 101                 return NULL;
 102
 103         INIT_LIST_HEAD(&ra_list->list);
 104         skb_queue_head_init(&ra_list->skb_head);
 105
 106         memcpy(ra_list->ra, ra, ETH_ALEN);
 107
 108         ra_list->total_pkt_count = 0;
 109
 110         mwifiex_dbg(adapter, INFO, "info: allocated ra_list %p\n", ra_list);
 111
 112         return ra_list;
 113 }
 114
 115 /* This function returns random no between 16 and 32 to be used as threshold
 116  * for no of packets after which BA setup is initiated.
 117  */
 118 static u8 mwifiex_get_random_ba_threshold(void)
 119 {
 120         u32 sec, usec;
 121         struct timeval ba_tstamp;
 122         u8 ba_threshold;
 123
 124         /* setup ba_packet_threshold here random number between
 125          * [BA_SETUP_PACKET_OFFSET,
 126          * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
 127          */
 128
 129         do_gettimeofday(&ba_tstamp);
 130         sec = (ba_tstamp.tv_sec & 0xFFFF) + (ba_tstamp.tv_sec >> 16);
 131         usec = (ba_tstamp.tv_usec & 0xFFFF) + (ba_tstamp.tv_usec >> 16);
 132         ba_threshold = (((sec << 16) + usec) % BA_SETUP_MAX_PACKET_THRESHOLD)
 133                                                       + BA_SETUP_PACKET_OFFSET;
 134
 135         return ba_threshold;
 136 }
 137
 138 /*
 139  * This function allocates and adds a RA list for all TIDs
 140  * with the given RA.
 141  */
 142 void mwifiex_ralist_add(struct mwifiex_private *priv, const u8 *ra)
 143 {
 144         int i;
 145         struct mwifiex_ra_list_tbl *ra_list;
 146         struct mwifiex_adapter *adapter = priv->adapter;
 147         struct mwifiex_sta_node *node;
 148         unsigned long flags;
 149
 150
 151         for (i = 0; i < MAX_NUM_TID; ++i) {
 152                 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
 153                 mwifiex_dbg(adapter, INFO,
 154                             "info: created ra_list %p\n", ra_list);
 155
 156                 if (!ra_list)
 157                         break;
 158
 159                 ra_list->is_11n_enabled = 0;
 160                 ra_list->tdls_link = false;
 161                 ra_list->ba_status = BA_SETUP_NONE;
 162                 ra_list->amsdu_in_ampdu = false;
 163                 if (!mwifiex_queuing_ra_based(priv)) {
 164                         if (mwifiex_get_tdls_link_status(priv, ra) ==
 165                             TDLS_SETUP_COMPLETE) {
 166                                 ra_list->tdls_link = true;
 167                                 ra_list->is_11n_enabled =
 168                                         mwifiex_tdls_peer_11n_enabled(priv, ra);
 169                         } else {
 170                                 ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
 171                         }
 172                 } else {
 173                         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 174                         node = mwifiex_get_sta_entry(priv, ra);
 175                         ra_list->is_11n_enabled =
 176                                       mwifiex_is_sta_11n_enabled(priv, node);
 177                         if (ra_list->is_11n_enabled)
 178                                 ra_list->max_amsdu = node->max_amsdu;
 179                         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 180                 }
 181
 182                 mwifiex_dbg(adapter, DATA, "data: ralist %p: is_11n_enabled=%d\n",
 183                             ra_list, ra_list->is_11n_enabled);
 184
 185                 if (ra_list->is_11n_enabled) {
 186                         ra_list->ba_pkt_count = 0;
 187                         ra_list->ba_packet_thr =
 188                                               mwifiex_get_random_ba_threshold();
 189                 }
 190                 list_add_tail(&ra_list->list,
 191                               &priv->wmm.tid_tbl_ptr[i].ra_list);
 192         }
 193 }
 194
 195 /*
 196  * This function sets the WMM queue priorities to their default values.
 197  */
 198 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
 199 {
 200         /* Default queue priorities: VO->VI->BE->BK */
 201         priv->wmm.queue_priority[0] = WMM_AC_VO;
 202         priv->wmm.queue_priority[1] = WMM_AC_VI;
 203         priv->wmm.queue_priority[2] = WMM_AC_BE;
 204         priv->wmm.queue_priority[3] = WMM_AC_BK;
 205 }
 206
 207 /*
 208  * This function map ACs to TIDs.
 209  */
 210 static void
 211 mwifiex_wmm_queue_priorities_tid(struct mwifiex_private *priv)
 212 {
 213         struct mwifiex_wmm_desc *wmm = &priv->wmm;
 214         u8 *queue_priority = wmm->queue_priority;
 215         int i;
 216
 217         for (i = 0; i < 4; ++i) {
 218                 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
 219                 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
 220         }
 221
 222         for (i = 0; i < MAX_NUM_TID; ++i)
 223                 priv->tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
 224
 225         atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
 226 }
 227
 228 /*
 229  * This function initializes WMM priority queues.
 230  */
 231 void
 232 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
 233                                    struct ieee_types_wmm_parameter *wmm_ie)
 234 {
 235         u16 cw_min, avg_back_off, tmp[4];
 236         u32 i, j, num_ac;
 237         u8 ac_idx;
 238
 239         if (!wmm_ie || !priv->wmm_enabled) {
 240                 /* WMM is not enabled, just set the defaults and return */
 241                 mwifiex_wmm_default_queue_priorities(priv);
 242                 return;
 243         }
 244
 245         mwifiex_dbg(priv->adapter, INFO,
 246                     "info: WMM Parameter IE: version=%d,\t"
 247                     "qos_info Parameter Set Count=%d, Reserved=%#x\n",
 248                     wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
 249                     IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
 250                     wmm_ie->reserved);
 251
 252         for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
 253                 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
 254                 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
 255                 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
 256                 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
 257
 258                 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
 259                 priv->wmm.queue_priority[ac_idx] = ac_idx;
 260                 tmp[ac_idx] = avg_back_off;
 261
 262                 mwifiex_dbg(priv->adapter, INFO,
 263                             "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
 264                             (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
 265                             cw_min, avg_back_off);
 266                 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
 267         }
 268
 269         /* Bubble sort */
 270         for (i = 0; i < num_ac; i++) {
 271                 for (j = 1; j < num_ac - i; j++) {
 272                         if (tmp[j - 1] > tmp[j]) {
 273                                 swap(tmp[j - 1], tmp[j]);
 274                                 swap(priv->wmm.queue_priority[j - 1],
 275                                      priv->wmm.queue_priority[j]);
 276                         } else if (tmp[j - 1] == tmp[j]) {
 277                                 if (priv->wmm.queue_priority[j - 1]
 278                                     < priv->wmm.queue_priority[j])
 279                                         swap(priv->wmm.queue_priority[j - 1],
 280                                              priv->wmm.queue_priority[j]);
 281                         }
 282                 }
 283         }
 284
 285         mwifiex_wmm_queue_priorities_tid(priv);
 286 }
 287
 288 /*
 289  * This function evaluates whether or not an AC is to be downgraded.
 290  *
 291  * In case the AC is not enabled, the highest AC is returned that is
 292  * enabled and does not require admission control.
 293  */
 294 static enum mwifiex_wmm_ac_e
 295 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
 296                               enum mwifiex_wmm_ac_e eval_ac)
 297 {
 298         int down_ac;
 299         enum mwifiex_wmm_ac_e ret_ac;
 300         struct mwifiex_wmm_ac_status *ac_status;
 301
 302         ac_status = &priv->wmm.ac_status[eval_ac];
 303
 304         if (!ac_status->disabled)
 305                 /* Okay to use this AC, its enabled */
 306                 return eval_ac;
 307
 308         /* Setup a default return value of the lowest priority */
 309         ret_ac = WMM_AC_BK;
 310
 311         /*
 312          *  Find the highest AC that is enabled and does not require
 313          *  admission control. The spec disallows downgrading to an AC,
 314          *  which is enabled due to a completed admission control.
 315          *  Unadmitted traffic is not to be sent on an AC with admitted
 316          *  traffic.
 317          */
 318         for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
 319                 ac_status = &priv->wmm.ac_status[down_ac];
 320
 321                 if (!ac_status->disabled && !ac_status->flow_required)
 322                         /* AC is enabled and does not require admission
 323                            control */
 324                         ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
 325         }
 326
 327         return ret_ac;
 328 }
 329
 330 /*
 331  * This function downgrades WMM priority queue.
 332  */
 333 void
 334 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
 335 {
 336         int ac_val;
 337
 338         mwifiex_dbg(priv->adapter, INFO, "info: WMM: AC Priorities:\t"
 339                     "BK(0), BE(1), VI(2), VO(3)\n");
 340
 341         if (!priv->wmm_enabled) {
 342                 /* WMM is not enabled, default priorities */
 343                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
 344                         priv->wmm.ac_down_graded_vals[ac_val] =
 345                                                 (enum mwifiex_wmm_ac_e) ac_val;
 346         } else {
 347                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
 348                         priv->wmm.ac_down_graded_vals[ac_val]
 349                                 = mwifiex_wmm_eval_downgrade_ac(priv,
 350                                                 (enum mwifiex_wmm_ac_e) ac_val);
 351                         mwifiex_dbg(priv->adapter, INFO,
 352                                     "info: WMM: AC PRIO %d maps to %d\n",
 353                                     ac_val,
 354                                     priv->wmm.ac_down_graded_vals[ac_val]);
 355                 }
 356         }
 357 }
 358
 359 /*
 360  * This function converts the IP TOS field to an WMM AC
 361  * Queue assignment.
 362  */
 363 static enum mwifiex_wmm_ac_e
 364 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
 365 {
 366         /* Map of TOS UP values to WMM AC */
 367         const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
 368                 WMM_AC_BK,
 369                 WMM_AC_BK,
 370                 WMM_AC_BE,
 371                 WMM_AC_VI,
 372                 WMM_AC_VI,
 373                 WMM_AC_VO,
 374                 WMM_AC_VO
 375         };
 376
 377         if (tos >= ARRAY_SIZE(tos_to_ac))
 378                 return WMM_AC_BE;
 379
 380         return tos_to_ac[tos];
 381 }
 382
 383 /*
 384  * This function evaluates a given TID and downgrades it to a lower
 385  * TID if the WMM Parameter IE received from the AP indicates that the
 386  * AP is disabled (due to call admission control (ACM bit). Mapping
 387  * of TID to AC is taken care of internally.
 388  */
 389 u8 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
 390 {
 391         enum mwifiex_wmm_ac_e ac, ac_down;
 392         u8 new_tid;
 393
 394         ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
 395         ac_down = priv->wmm.ac_down_graded_vals[ac];
 396
 397         /* Send the index to tid array, picking from the array will be
 398          * taken care by dequeuing function
 399          */
 400         new_tid = ac_to_tid[ac_down][tid % 2];
 401
 402         return new_tid;
 403 }
 404
 405 /*
 406  * This function initializes the WMM state information and the
 407  * WMM data path queues.
 408  */
 409 void
 410 mwifiex_wmm_init(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                         continue;
 419
 420                 for (i = 0; i < MAX_NUM_TID; ++i) {
 421                         if (!disable_tx_amsdu &&
 422                             adapter->tx_buf_size > MWIFIEX_TX_DATA_BUF_SIZE_2K)
 423                                 priv->aggr_prio_tbl[i].amsdu =
 424                                                         priv->tos_to_tid_inv[i];
 425                         else
 426                                 priv->aggr_prio_tbl[i].amsdu =
 427                                                         BA_STREAM_NOT_ALLOWED;
 428                         priv->aggr_prio_tbl[i].ampdu_ap =
 429                                                         priv->tos_to_tid_inv[i];
 430                         priv->aggr_prio_tbl[i].ampdu_user =
 431                                                         priv->tos_to_tid_inv[i];
 432                 }
 433
 434                 priv->aggr_prio_tbl[6].amsdu
 435                                         = priv->aggr_prio_tbl[6].ampdu_ap
 436                                         = priv->aggr_prio_tbl[6].ampdu_user
 437                                         = BA_STREAM_NOT_ALLOWED;
 438
 439                 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
 440                                         = priv->aggr_prio_tbl[7].ampdu_user
 441                                         = BA_STREAM_NOT_ALLOWED;
 442
 443                 mwifiex_set_ba_params(priv);
 444                 mwifiex_reset_11n_rx_seq_num(priv);
 445
 446                 atomic_set(&priv->wmm.tx_pkts_queued, 0);
 447                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 448         }
 449 }
 450
 451 /*
 452  * This function checks if WMM Tx queue is empty.
 453  */
 454 int
 455 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
 456 {
 457         int i;
 458         struct mwifiex_private *priv;
 459
 460         for (i = 0; i < adapter->priv_num; ++i) {
 461                 priv = adapter->priv[i];
 462                 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
 463                         return false;
 464         }
 465
 466         return true;
 467 }
 468
 469 /*
 470  * This function deletes all packets in an RA list node.
 471  *
 472  * The packet sent completion callback handler are called with
 473  * status failure, after they are dequeued to ensure proper
 474  * cleanup. The RA list node itself is freed at the end.
 475  */
 476 static void
 477 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
 478                                     struct mwifiex_ra_list_tbl *ra_list)
 479 {
 480         struct mwifiex_adapter *adapter = priv->adapter;
 481         struct sk_buff *skb, *tmp;
 482
 483         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
 484                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 485 }
 486
 487 /*
 488  * This function deletes all packets in an RA list.
 489  *
 490  * Each nodes in the RA list are freed individually first, and then
 491  * the RA list itself is freed.
 492  */
 493 static void
 494 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
 495                                struct list_head *ra_list_head)
 496 {
 497         struct mwifiex_ra_list_tbl *ra_list;
 498
 499         list_for_each_entry(ra_list, ra_list_head, list)
 500                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 501 }
 502
 503 /*
 504  * This function deletes all packets in all RA lists.
 505  */
 506 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
 507 {
 508         int i;
 509
 510         for (i = 0; i < MAX_NUM_TID; i++)
 511                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
 512                                                                        ra_list);
 513
 514         atomic_set(&priv->wmm.tx_pkts_queued, 0);
 515         atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 516 }
 517
 518 /*
 519  * This function deletes all route addresses from all RA lists.
 520  */
 521 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 522 {
 523         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
 524         int i;
 525
 526         for (i = 0; i < MAX_NUM_TID; ++i) {
 527                 mwifiex_dbg(priv->adapter, INFO,
 528                             "info: ra_list: freeing buf for tid %d\n", i);
 529                 list_for_each_entry_safe(ra_list, tmp_node,
 530                                          &priv->wmm.tid_tbl_ptr[i].ra_list,
 531                                          list) {
 532                         list_del(&ra_list->list);
 533                         kfree(ra_list);
 534                 }
 535
 536                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
 537         }
 538 }
 539
 540 static int mwifiex_free_ack_frame(int id, void *p, void *data)
 541 {
 542         pr_warn("Have pending ack frames!\n");
 543         kfree_skb(p);
 544         return 0;
 545 }
 546
 547 /*
 548  * This function cleans up the Tx and Rx queues.
 549  *
 550  * Cleanup includes -
 551  *      - All packets in RA lists
 552  *      - All entries in Rx reorder table
 553  *      - All entries in Tx BA stream table
 554  *      - MPA buffer (if required)
 555  *      - All RA lists
 556  */
 557 void
 558 mwifiex_clean_txrx(struct mwifiex_private *priv)
 559 {
 560         unsigned long flags;
 561         struct sk_buff *skb, *tmp;
 562
 563         mwifiex_11n_cleanup_reorder_tbl(priv);
 564         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 565
 566         mwifiex_wmm_cleanup_queues(priv);
 567         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
 568
 569         if (priv->adapter->if_ops.cleanup_mpa_buf)
 570                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
 571
 572         mwifiex_wmm_delete_all_ralist(priv);
 573         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 574
 575         if (priv->adapter->if_ops.clean_pcie_ring &&
 576             !priv->adapter->surprise_removed)
 577                 priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
 578         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 579
 580         skb_queue_walk_safe(&priv->tdls_txq, skb, tmp)
 581                 mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
 582
 583         idr_for_each(&priv->ack_status_frames, mwifiex_free_ack_frame, NULL);
 584         idr_destroy(&priv->ack_status_frames);
 585 }
 586
 587 /*
 588  * This function retrieves a particular RA list node, matching with the
 589  * given TID and RA address.
 590  */
 591 struct mwifiex_ra_list_tbl *
 592 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
 593                             const u8 *ra_addr)
 594 {
 595         struct mwifiex_ra_list_tbl *ra_list;
 596
 597         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
 598                             list) {
 599                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
 600                         return ra_list;
 601         }
 602
 603         return NULL;
 604 }
 605
 606 /*
 607  * This function retrieves an RA list node for a given TID and
 608  * RA address pair.
 609  *
 610  * If no such node is found, a new node is added first and then
 611  * retrieved.
 612  */
 613 struct mwifiex_ra_list_tbl *
 614 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid,
 615                             const u8 *ra_addr)
 616 {
 617         struct mwifiex_ra_list_tbl *ra_list;
 618
 619         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 620         if (ra_list)
 621                 return ra_list;
 622         mwifiex_ralist_add(priv, ra_addr);
 623
 624         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 625 }
 626
 627 /*
 628  * This function deletes RA list nodes for given mac for all TIDs.
 629  * Function also decrements TX pending count accordingly.
 630  */
 631 void
 632 mwifiex_wmm_del_peer_ra_list(struct mwifiex_private *priv, const u8 *ra_addr)
 633 {
 634         struct mwifiex_ra_list_tbl *ra_list;
 635         unsigned long flags;
 636         int i;
 637
 638         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 639
 640         for (i = 0; i < MAX_NUM_TID; ++i) {
 641                 ra_list = mwifiex_wmm_get_ralist_node(priv, i, ra_addr);
 642
 643                 if (!ra_list)
 644                         continue;
 645                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 646                 atomic_sub(ra_list->total_pkt_count, &priv->wmm.tx_pkts_queued);
 647                 list_del(&ra_list->list);
 648                 kfree(ra_list);
 649         }
 650         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 651 }
 652
 653 /*
 654  * This function checks if a particular RA list node exists in a given TID
 655  * table index.
 656  */
 657 int
 658 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
 659                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
 660 {
 661         struct mwifiex_ra_list_tbl *rlist;
 662
 663         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
 664                             list) {
 665                 if (rlist == ra_list)
 666                         return true;
 667         }
 668
 669         return false;
 670 }
 671
 672 /*
 673  * This function adds a packet to WMM queue.
 674  *
 675  * In disconnected state the packet is immediately dropped and the
 676  * packet send completion callback is called with status failure.
 677  *
 678  * Otherwise, the correct RA list node is located and the packet
 679  * is queued at the list tail.
 680  */
 681 void
 682 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
 683                             struct sk_buff *skb)
 684 {
 685         struct mwifiex_adapter *adapter = priv->adapter;
 686         u32 tid;
 687         struct mwifiex_ra_list_tbl *ra_list;
 688         u8 ra[ETH_ALEN], tid_down;
 689         unsigned long flags;
 690         struct list_head list_head;
 691         int tdls_status = TDLS_NOT_SETUP;
 692         struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
 693         struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
 694
 695         memcpy(ra, eth_hdr->h_dest, ETH_ALEN);
 696
 697         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
 698             ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) {
 699                 if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS)
 700                         mwifiex_dbg(adapter, DATA,
 701                                     "TDLS setup packet for %pM.\t"
 702                                     "Don't block\n", ra);
 703                 else if (memcmp(priv->cfg_bssid, ra, ETH_ALEN))
 704                         tdls_status = mwifiex_get_tdls_link_status(priv, ra);
 705         }
 706
 707         if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
 708                 mwifiex_dbg(adapter, DATA, "data: drop packet in disconnect\n");
 709                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 710                 return;
 711         }
 712
 713         tid = skb->priority;
 714
 715         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 716
 717         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 718
 719         /* In case of infra as we have already created the list during
 720            association we just don't have to call get_queue_raptr, we will
 721            have only 1 raptr for a tid in case of infra */
 722         if (!mwifiex_queuing_ra_based(priv) &&
 723             !mwifiex_is_skb_mgmt_frame(skb)) {
 724                 switch (tdls_status) {
 725                 case TDLS_SETUP_COMPLETE:
 726                         ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down,
 727                                                               ra);
 728                         tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
 729                         break;
 730                 case TDLS_SETUP_INPROGRESS:
 731                         skb_queue_tail(&priv->tdls_txq, skb);
 732                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
 733                                                flags);
 734                         return;
 735                 default:
 736                         list_head = priv->wmm.tid_tbl_ptr[tid_down].ra_list;
 737                         if (!list_empty(&list_head))
 738                                 ra_list = list_first_entry(
 739                                         &list_head, struct mwifiex_ra_list_tbl,
 740                                         list);
 741                         else
 742                                 ra_list = NULL;
 743                         break;
 744                 }
 745         } else {
 746                 memcpy(ra, skb->data, ETH_ALEN);
 747                 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
 748                         eth_broadcast_addr(ra);
 749                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
 750         }
 751
 752         if (!ra_list) {
 753                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 754                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 755                 return;
 756         }
 757
 758         skb_queue_tail(&ra_list->skb_head, skb);
 759
 760         ra_list->ba_pkt_count++;
 761         ra_list->total_pkt_count++;
 762
 763         if (atomic_read(&priv->wmm.highest_queued_prio) <
 764                                                 priv->tos_to_tid_inv[tid_down])
 765                 atomic_set(&priv->wmm.highest_queued_prio,
 766                            priv->tos_to_tid_inv[tid_down]);
 767
 768         atomic_inc(&priv->wmm.tx_pkts_queued);
 769
 770         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 771 }
 772
 773 /*
 774  * This function processes the get WMM status command response from firmware.
 775  *
 776  * The response may contain multiple TLVs -
 777  *      - AC Queue status TLVs
 778  *      - Current WMM Parameter IE TLV
 779  *      - Admission Control action frame TLVs
 780  *
 781  * This function parses the TLVs and then calls further specific functions
 782  * to process any changes in the queue prioritize or state.
 783  */
 784 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
 785                                const struct host_cmd_ds_command *resp)
 786 {
 787         u8 *curr = (u8 *) &resp->params.get_wmm_status;
 788         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
 789         int mask = IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK;
 790         bool valid = true;
 791
 792         struct mwifiex_ie_types_data *tlv_hdr;
 793         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
 794         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
 795         struct mwifiex_wmm_ac_status *ac_status;
 796
 797         mwifiex_dbg(priv->adapter, INFO,
 798                     "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
 799                     resp_len);
 800
 801         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
 802                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
 803                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
 804
 805                 if (resp_len < tlv_len + sizeof(tlv_hdr->header))
 806                         break;
 807
 808                 switch (le16_to_cpu(tlv_hdr->header.type)) {
 809                 case TLV_TYPE_WMMQSTATUS:
 810                         tlv_wmm_qstatus =
 811                                 (struct mwifiex_ie_types_wmm_queue_status *)
 812                                 tlv_hdr;
 813                         mwifiex_dbg(priv->adapter, CMD,
 814                                     "info: CMD_RESP: WMM_GET_STATUS:\t"
 815                                     "QSTATUS TLV: %d, %d, %d\n",
 816                                     tlv_wmm_qstatus->queue_index,
 817                                     tlv_wmm_qstatus->flow_required,
 818                                     tlv_wmm_qstatus->disabled);
 819
 820                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
 821                                                          queue_index];
 822                         ac_status->disabled = tlv_wmm_qstatus->disabled;
 823                         ac_status->flow_required =
 824                                                 tlv_wmm_qstatus->flow_required;
 825                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
 826                         break;
 827
 828                 case WLAN_EID_VENDOR_SPECIFIC:
 829                         /*
 830                          * Point the regular IEEE IE 2 bytes into the Marvell IE
 831                          *   and setup the IEEE IE type and length byte fields
 832                          */
 833
 834                         wmm_param_ie =
 835                                 (struct ieee_types_wmm_parameter *) (curr +
 836                                                                     2);
 837                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
 838                         wmm_param_ie->vend_hdr.element_id =
 839                                                 WLAN_EID_VENDOR_SPECIFIC;
 840
 841                         mwifiex_dbg(priv->adapter, CMD,
 842                                     "info: CMD_RESP: WMM_GET_STATUS:\t"
 843                                     "WMM Parameter Set Count: %d\n",
 844                                     wmm_param_ie->qos_info_bitmap & mask);
 845
 846                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
 847                                wmm_ie, wmm_param_ie,
 848                                wmm_param_ie->vend_hdr.len + 2);
 849
 850                         break;
 851
 852                 default:
 853                         valid = false;
 854                         break;
 855                 }
 856
 857                 curr += (tlv_len + sizeof(tlv_hdr->header));
 858                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
 859         }
 860
 861         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
 862         mwifiex_wmm_setup_ac_downgrade(priv);
 863
 864         return 0;
 865 }
 866
 867 /*
 868  * Callback handler from the command module to allow insertion of a WMM TLV.
 869  *
 870  * If the BSS we are associating to supports WMM, this function adds the
 871  * required WMM Information IE to the association request command buffer in
 872  * the form of a Marvell extended IEEE IE.
 873  */
 874 u32
 875 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
 876                                     u8 **assoc_buf,
 877                                     struct ieee_types_wmm_parameter *wmm_ie,
 878                                     struct ieee80211_ht_cap *ht_cap)
 879 {
 880         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
 881         u32 ret_len = 0;
 882
 883         /* Null checks */
 884         if (!assoc_buf)
 885                 return 0;
 886         if (!(*assoc_buf))
 887                 return 0;
 888
 889         if (!wmm_ie)
 890                 return 0;
 891
 892         mwifiex_dbg(priv->adapter, INFO,
 893                     "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
 894                     wmm_ie->vend_hdr.element_id);
 895
 896         if ((priv->wmm_required ||
 897              (ht_cap && (priv->adapter->config_bands & BAND_GN ||
 898              priv->adapter->config_bands & BAND_AN))) &&
 899             wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
 900                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
 901                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
 902                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
 903                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
 904                        le16_to_cpu(wmm_tlv->header.len));
 905                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
 906                         memcpy((u8 *) (wmm_tlv->wmm_ie
 907                                        + le16_to_cpu(wmm_tlv->header.len)
 908                                        - sizeof(priv->wmm_qosinfo)),
 909                                &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
 910
 911                 ret_len = sizeof(wmm_tlv->header)
 912                           + le16_to_cpu(wmm_tlv->header.len);
 913
 914                 *assoc_buf += ret_len;
 915         }
 916
 917         return ret_len;
 918 }
 919
 920 /*
 921  * This function computes the time delay in the driver queues for a
 922  * given packet.
 923  *
 924  * When the packet is received at the OS/Driver interface, the current
 925  * time is set in the packet structure. The difference between the present
 926  * time and that received time is computed in this function and limited
 927  * based on pre-compiled limits in the driver.
 928  */
 929 u8
 930 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
 931                                   const struct sk_buff *skb)
 932 {
 933         u32 queue_delay = ktime_to_ms(net_timedelta(skb->tstamp));
 934         u8 ret_val;
 935
 936         /*
 937          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
 938          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
 939          *
 940          * Pass max value if queue_delay is beyond the uint8 range
 941          */
 942         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
 943
 944         mwifiex_dbg(priv->adapter, DATA, "data: WMM: Pkt Delay: %d ms,\t"
 945                     "%d ms sent to FW\n", queue_delay, ret_val);
 946
 947         return ret_val;
 948 }
 949
 950 /*
 951  * This function retrieves the highest priority RA list table pointer.
 952  */
 953 static struct mwifiex_ra_list_tbl *
 954 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
 955                                      struct mwifiex_private **priv, int *tid)
 956 {
 957         struct mwifiex_private *priv_tmp;
 958         struct mwifiex_ra_list_tbl *ptr;
 959         struct mwifiex_tid_tbl *tid_ptr;
 960         atomic_t *hqp;
 961         unsigned long flags_ra;
 962         int i, j;
 963
 964         /* check the BSS with highest priority first */
 965         for (j = adapter->priv_num - 1; j >= 0; --j) {
 966                 /* iterate over BSS with the equal priority */
 967                 list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur,
 968                                     &adapter->bss_prio_tbl[j].bss_prio_head,
 969                                     list) {
 970
 971                         priv_tmp = adapter->bss_prio_tbl[j].bss_prio_cur->priv;
 972
 973                         if (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0)
 974                                 continue;
 975
 976                         /* iterate over the WMM queues of the BSS */
 977                         hqp = &priv_tmp->wmm.highest_queued_prio;
 978                         for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
 979
 980                                 spin_lock_irqsave(&priv_tmp->wmm.
 981                                                   ra_list_spinlock, flags_ra);
 982
 983                                 tid_ptr = &(priv_tmp)->wmm.
 984                                         tid_tbl_ptr[tos_to_tid[i]];
 985
 986                                 /* iterate over receiver addresses */
 987                                 list_for_each_entry(ptr, &tid_ptr->ra_list,
 988                                                     list) {
 989
 990                                         if (!skb_queue_empty(&ptr->skb_head))
 991                                                 /* holds both locks */
 992                                                 goto found;
 993                                 }
 994
 995                                 spin_unlock_irqrestore(&priv_tmp->wmm.
 996                                                        ra_list_spinlock,
 997                                                        flags_ra);
 998                         }
 999                 }
1000
1001         }
1002
1003         return NULL;
1004
1005 found:
1006         /* holds ra_list_spinlock */
1007         if (atomic_read(hqp) > i)
1008                 atomic_set(hqp, i);
1009         spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags_ra);
1010
1011         *priv = priv_tmp;
1012         *tid = tos_to_tid[i];
1013
1014         return ptr;
1015 }
1016
1017 /* This functions rotates ra and bss lists so packets are picked round robin.
1018  *
1019  * After a packet is successfully transmitted, rotate the ra list, so the ra
1020  * next to the one transmitted, will come first in the list. This way we pick
1021  * the ra' in a round robin fashion. Same applies to bss nodes of equal
1022  * priority.
1023  *
1024  * Function also increments wmm.packets_out counter.
1025  */
1026 void mwifiex_rotate_priolists(struct mwifiex_private *priv,
1027                                  struct mwifiex_ra_list_tbl *ra,
1028                                  int tid)
1029 {
1030         struct mwifiex_adapter *adapter = priv->adapter;
1031         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
1032         struct mwifiex_tid_tbl *tid_ptr = &priv->wmm.tid_tbl_ptr[tid];
1033         unsigned long flags;
1034
1035         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
1036         /*
1037          * dirty trick: we remove 'head' temporarily and reinsert it after
1038          * curr bss node. imagine list to stay fixed while head is moved
1039          */
1040         list_move(&tbl[priv->bss_priority].bss_prio_head,
1041                   &tbl[priv->bss_priority].bss_prio_cur->list);
1042         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
1043
1044         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1045         if (mwifiex_is_ralist_valid(priv, ra, tid)) {
1046                 priv->wmm.packets_out[tid]++;
1047                 /* same as above */
1048                 list_move(&tid_ptr->ra_list, &ra->list);
1049         }
1050         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1051 }
1052
1053 /*
1054  * This function checks if 11n aggregation is possible.
1055  */
1056 static int
1057 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
1058                                     struct mwifiex_ra_list_tbl *ptr,
1059                                     int max_buf_size)
1060 {
1061         int count = 0, total_size = 0;
1062         struct sk_buff *skb, *tmp;
1063         int max_amsdu_size;
1064
1065         if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled &&
1066             ptr->is_11n_enabled)
1067                 max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
1068         else
1069                 max_amsdu_size = max_buf_size;
1070
1071         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
1072                 total_size += skb->len;
1073                 if (total_size >= max_amsdu_size)
1074                         break;
1075                 if (++count >= MIN_NUM_AMSDU)
1076                         return true;
1077         }
1078
1079         return false;
1080 }
1081
1082 /*
1083  * This function sends a single packet to firmware for transmission.
1084  */
1085 static void
1086 mwifiex_send_single_packet(struct mwifiex_private *priv,
1087                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1088                            unsigned long ra_list_flags)
1089                            __releases(&priv->wmm.ra_list_spinlock)
1090 {
1091         struct sk_buff *skb, *skb_next;
1092         struct mwifiex_tx_param tx_param;
1093         struct mwifiex_adapter *adapter = priv->adapter;
1094         struct mwifiex_txinfo *tx_info;
1095
1096         if (skb_queue_empty(&ptr->skb_head)) {
1097                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1098                                        ra_list_flags);
1099                 mwifiex_dbg(adapter, DATA, "data: nothing to send\n");
1100                 return;
1101         }
1102
1103         skb = skb_dequeue(&ptr->skb_head);
1104
1105         tx_info = MWIFIEX_SKB_TXCB(skb);
1106         mwifiex_dbg(adapter, DATA,
1107                     "data: dequeuing the packet %p %p\n", ptr, skb);
1108
1109         ptr->total_pkt_count--;
1110
1111         if (!skb_queue_empty(&ptr->skb_head))
1112                 skb_next = skb_peek(&ptr->skb_head);
1113         else
1114                 skb_next = NULL;
1115
1116         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1117
1118         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1119                                 sizeof(struct txpd) : 0);
1120
1121         if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1122                 /* Queue the packet back at the head */
1123                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1124
1125                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1126                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1127                                                ra_list_flags);
1128                         mwifiex_write_data_complete(adapter, skb, 0, -1);
1129                         return;
1130                 }
1131
1132                 skb_queue_tail(&ptr->skb_head, skb);
1133
1134                 ptr->total_pkt_count++;
1135                 ptr->ba_pkt_count++;
1136                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1137                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1138                                        ra_list_flags);
1139         } else {
1140                 mwifiex_rotate_priolists(priv, ptr, ptr_index);
1141                 atomic_dec(&priv->wmm.tx_pkts_queued);
1142         }
1143 }
1144
1145 /*
1146  * This function checks if the first packet in the given RA list
1147  * is already processed or not.
1148  */
1149 static int
1150 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1151                          struct mwifiex_ra_list_tbl *ptr)
1152 {
1153         struct sk_buff *skb;
1154         struct mwifiex_txinfo *tx_info;
1155
1156         if (skb_queue_empty(&ptr->skb_head))
1157                 return false;
1158
1159         skb = skb_peek(&ptr->skb_head);
1160
1161         tx_info = MWIFIEX_SKB_TXCB(skb);
1162         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1163                 return true;
1164
1165         return false;
1166 }
1167
1168 /*
1169  * This function sends a single processed packet to firmware for
1170  * transmission.
1171  */
1172 static void
1173 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1174                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1175                               unsigned long ra_list_flags)
1176                                 __releases(&priv->wmm.ra_list_spinlock)
1177 {
1178         struct mwifiex_tx_param tx_param;
1179         struct mwifiex_adapter *adapter = priv->adapter;
1180         int ret = -1;
1181         struct sk_buff *skb, *skb_next;
1182         struct mwifiex_txinfo *tx_info;
1183
1184         if (skb_queue_empty(&ptr->skb_head)) {
1185                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1186                                        ra_list_flags);
1187                 return;
1188         }
1189
1190         skb = skb_dequeue(&ptr->skb_head);
1191
1192         if (adapter->data_sent || adapter->tx_lock_flag) {
1193                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1194                                        ra_list_flags);
1195                 skb_queue_tail(&adapter->tx_data_q, skb);
1196                 atomic_inc(&adapter->tx_queued);
1197                 return;
1198         }
1199
1200         if (!skb_queue_empty(&ptr->skb_head))
1201                 skb_next = skb_peek(&ptr->skb_head);
1202         else
1203                 skb_next = NULL;
1204
1205         tx_info = MWIFIEX_SKB_TXCB(skb);
1206
1207         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1208
1209         if (adapter->iface_type == MWIFIEX_USB) {
1210                 adapter->data_sent = true;
1211                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
1212                                                    skb, NULL);
1213         } else {
1214                 tx_param.next_pkt_len =
1215                         ((skb_next) ? skb_next->len +
1216                          sizeof(struct txpd) : 0);
1217                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1218                                                    skb, &tx_param);
1219         }
1220
1221         switch (ret) {
1222         case -EBUSY:
1223                 mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
1224                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1225
1226                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1227                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1228                                                ra_list_flags);
1229                         mwifiex_write_data_complete(adapter, skb, 0, -1);
1230                         return;
1231                 }
1232
1233                 skb_queue_tail(&ptr->skb_head, skb);
1234
1235                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1236                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1237                                        ra_list_flags);
1238                 break;
1239         case -1:
1240                 if (adapter->iface_type != MWIFIEX_PCIE)
1241                         adapter->data_sent = false;
1242                 mwifiex_dbg(adapter, ERROR, "host_to_card failed: %#x\n", ret);
1243                 adapter->dbg.num_tx_host_to_card_failure++;
1244                 mwifiex_write_data_complete(adapter, skb, 0, ret);
1245                 break;
1246         case -EINPROGRESS:
1247                 if (adapter->iface_type != MWIFIEX_PCIE)
1248                         adapter->data_sent = false;
1249                 break;
1250         case 0:
1251                 mwifiex_write_data_complete(adapter, skb, 0, ret);
1252         default:
1253                 break;
1254         }
1255         if (ret != -EBUSY) {
1256                 mwifiex_rotate_priolists(priv, ptr, ptr_index);
1257                 atomic_dec(&priv->wmm.tx_pkts_queued);
1258         }
1259 }
1260
1261 /*
1262  * This function dequeues a packet from the highest priority list
1263  * and transmits it.
1264  */
1265 static int
1266 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1267 {
1268         struct mwifiex_ra_list_tbl *ptr;
1269         struct mwifiex_private *priv = NULL;
1270         int ptr_index = 0;
1271         u8 ra[ETH_ALEN];
1272         int tid_del = 0, tid = 0;
1273         unsigned long flags;
1274
1275         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1276         if (!ptr)
1277                 return -1;
1278
1279         tid = mwifiex_get_tid(ptr);
1280
1281         mwifiex_dbg(adapter, DATA, "data: tid=%d\n", tid);
1282
1283         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1284         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1285                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1286                 return -1;
1287         }
1288
1289         if (mwifiex_is_ptr_processed(priv, ptr)) {
1290                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1291                 /* ra_list_spinlock has been freed in
1292                    mwifiex_send_processed_packet() */
1293                 return 0;
1294         }
1295
1296         if (!ptr->is_11n_enabled ||
1297                 ptr->ba_status ||
1298                 priv->wps.session_enable) {
1299                 if (ptr->is_11n_enabled &&
1300                         ptr->ba_status &&
1301                         ptr->amsdu_in_ampdu &&
1302                         mwifiex_is_amsdu_allowed(priv, tid) &&
1303                         mwifiex_is_11n_aggragation_possible(priv, ptr,
1304                                                         adapter->tx_buf_size))
1305                         mwifiex_11n_aggregate_pkt(priv, ptr, ptr_index, flags);
1306                         /* ra_list_spinlock has been freed in
1307                          * mwifiex_11n_aggregate_pkt()
1308                          */
1309                 else
1310                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1311                         /* ra_list_spinlock has been freed in
1312                          * mwifiex_send_single_packet()
1313                          */
1314         } else {
1315                 if (mwifiex_is_ampdu_allowed(priv, ptr, tid) &&
1316                     ptr->ba_pkt_count > ptr->ba_packet_thr) {
1317                         if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1318                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1319                                                       BA_SETUP_INPROGRESS);
1320                                 mwifiex_send_addba(priv, tid, ptr->ra);
1321                         } else if (mwifiex_find_stream_to_delete
1322                                    (priv, tid, &tid_del, ra)) {
1323                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1324                                                       BA_SETUP_INPROGRESS);
1325                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1326                         }
1327                 }
1328                 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1329                     mwifiex_is_11n_aggragation_possible(priv, ptr,
1330                                                         adapter->tx_buf_size))
1331                         mwifiex_11n_aggregate_pkt(priv, ptr, ptr_index, flags);
1332                         /* ra_list_spinlock has been freed in
1333                            mwifiex_11n_aggregate_pkt() */
1334                 else
1335                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1336                         /* ra_list_spinlock has been freed in
1337                            mwifiex_send_single_packet() */
1338         }
1339         return 0;
1340 }
1341
1342 /*
1343  * This function transmits the highest priority packet awaiting in the
1344  * WMM Queues.
1345  */
1346 void
1347 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1348 {
1349         do {
1350                 if (mwifiex_dequeue_tx_packet(adapter))
1351                         break;
1352                 if (adapter->iface_type != MWIFIEX_SDIO) {
1353                         if (adapter->data_sent ||
1354                             adapter->tx_lock_flag)
1355                                 break;
1356                 } else {
1357                         if (atomic_read(&adapter->tx_queued) >=
1358                             MWIFIEX_MAX_PKTS_TXQ)
1359                                 break;
1360                 }
1361         } while (!mwifiex_wmm_lists_empty(adapter));
1362 }