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         u64 ns;
 121         /* setup ba_packet_threshold here random number between
 122          * [BA_SETUP_PACKET_OFFSET,
 123          * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
 124          */
 125         ns = ktime_get_ns();
 126         ns += (ns >> 32) + (ns >> 16);
 127
 128         return ((u8)ns % BA_SETUP_MAX_PACKET_THRESHOLD) + BA_SETUP_PACKET_OFFSET;
 129 }
 130
 131 /*
 132  * This function allocates and adds a RA list for all TIDs
 133  * with the given RA.
 134  */
 135 void mwifiex_ralist_add(struct mwifiex_private *priv, const u8 *ra)
 136 {
 137         int i;
 138         struct mwifiex_ra_list_tbl *ra_list;
 139         struct mwifiex_adapter *adapter = priv->adapter;
 140         struct mwifiex_sta_node *node;
 141         unsigned long flags;
 142
 143
 144         for (i = 0; i < MAX_NUM_TID; ++i) {
 145                 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
 146                 mwifiex_dbg(adapter, INFO,
 147                             "info: created ra_list %p\n", ra_list);
 148
 149                 if (!ra_list)
 150                         break;
 151
 152                 ra_list->is_11n_enabled = 0;
 153                 ra_list->tdls_link = false;
 154                 ra_list->ba_status = BA_SETUP_NONE;
 155                 ra_list->amsdu_in_ampdu = false;
 156                 ra_list->tx_paused = false;
 157                 if (!mwifiex_queuing_ra_based(priv)) {
 158                         if (mwifiex_is_tdls_link_setup
 159                                 (mwifiex_get_tdls_link_status(priv, ra))) {
 160                                 ra_list->tdls_link = true;
 161                                 ra_list->is_11n_enabled =
 162                                         mwifiex_tdls_peer_11n_enabled(priv, ra);
 163                         } else {
 164                                 ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
 165                         }
 166                 } else {
 167                         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 168                         node = mwifiex_get_sta_entry(priv, ra);
 169                         ra_list->is_11n_enabled =
 170                                       mwifiex_is_sta_11n_enabled(priv, node);
 171                         if (ra_list->is_11n_enabled)
 172                                 ra_list->max_amsdu = node->max_amsdu;
 173                         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 174                 }
 175
 176                 mwifiex_dbg(adapter, DATA, "data: ralist %p: is_11n_enabled=%d\n",
 177                             ra_list, ra_list->is_11n_enabled);
 178
 179                 if (ra_list->is_11n_enabled) {
 180                         ra_list->ba_pkt_count = 0;
 181                         ra_list->ba_packet_thr =
 182                                               mwifiex_get_random_ba_threshold();
 183                 }
 184                 list_add_tail(&ra_list->list,
 185                               &priv->wmm.tid_tbl_ptr[i].ra_list);
 186         }
 187 }
 188
 189 /*
 190  * This function sets the WMM queue priorities to their default values.
 191  */
 192 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
 193 {
 194         /* Default queue priorities: VO->VI->BE->BK */
 195         priv->wmm.queue_priority[0] = WMM_AC_VO;
 196         priv->wmm.queue_priority[1] = WMM_AC_VI;
 197         priv->wmm.queue_priority[2] = WMM_AC_BE;
 198         priv->wmm.queue_priority[3] = WMM_AC_BK;
 199 }
 200
 201 /*
 202  * This function map ACs to TIDs.
 203  */
 204 static void
 205 mwifiex_wmm_queue_priorities_tid(struct mwifiex_private *priv)
 206 {
 207         struct mwifiex_wmm_desc *wmm = &priv->wmm;
 208         u8 *queue_priority = wmm->queue_priority;
 209         int i;
 210
 211         for (i = 0; i < 4; ++i) {
 212                 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
 213                 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
 214         }
 215
 216         for (i = 0; i < MAX_NUM_TID; ++i)
 217                 priv->tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
 218
 219         atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
 220 }
 221
 222 /*
 223  * This function initializes WMM priority queues.
 224  */
 225 void
 226 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
 227                                    struct ieee_types_wmm_parameter *wmm_ie)
 228 {
 229         u16 cw_min, avg_back_off, tmp[4];
 230         u32 i, j, num_ac;
 231         u8 ac_idx;
 232
 233         if (!wmm_ie || !priv->wmm_enabled) {
 234                 /* WMM is not enabled, just set the defaults and return */
 235                 mwifiex_wmm_default_queue_priorities(priv);
 236                 return;
 237         }
 238
 239         mwifiex_dbg(priv->adapter, INFO,
 240                     "info: WMM Parameter IE: version=%d,\t"
 241                     "qos_info Parameter Set Count=%d, Reserved=%#x\n",
 242                     wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
 243                     IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
 244                     wmm_ie->reserved);
 245
 246         for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
 247                 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
 248                 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
 249                 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
 250                 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
 251
 252                 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
 253                 priv->wmm.queue_priority[ac_idx] = ac_idx;
 254                 tmp[ac_idx] = avg_back_off;
 255
 256                 mwifiex_dbg(priv->adapter, INFO,
 257                             "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
 258                             (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
 259                             cw_min, avg_back_off);
 260                 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
 261         }
 262
 263         /* Bubble sort */
 264         for (i = 0; i < num_ac; i++) {
 265                 for (j = 1; j < num_ac - i; j++) {
 266                         if (tmp[j - 1] > tmp[j]) {
 267                                 swap(tmp[j - 1], tmp[j]);
 268                                 swap(priv->wmm.queue_priority[j - 1],
 269                                      priv->wmm.queue_priority[j]);
 270                         } else if (tmp[j - 1] == tmp[j]) {
 271                                 if (priv->wmm.queue_priority[j - 1]
 272                                     < priv->wmm.queue_priority[j])
 273                                         swap(priv->wmm.queue_priority[j - 1],
 274                                              priv->wmm.queue_priority[j]);
 275                         }
 276                 }
 277         }
 278
 279         mwifiex_wmm_queue_priorities_tid(priv);
 280 }
 281
 282 /*
 283  * This function evaluates whether or not an AC is to be downgraded.
 284  *
 285  * In case the AC is not enabled, the highest AC is returned that is
 286  * enabled and does not require admission control.
 287  */
 288 static enum mwifiex_wmm_ac_e
 289 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
 290                               enum mwifiex_wmm_ac_e eval_ac)
 291 {
 292         int down_ac;
 293         enum mwifiex_wmm_ac_e ret_ac;
 294         struct mwifiex_wmm_ac_status *ac_status;
 295
 296         ac_status = &priv->wmm.ac_status[eval_ac];
 297
 298         if (!ac_status->disabled)
 299                 /* Okay to use this AC, its enabled */
 300                 return eval_ac;
 301
 302         /* Setup a default return value of the lowest priority */
 303         ret_ac = WMM_AC_BK;
 304
 305         /*
 306          *  Find the highest AC that is enabled and does not require
 307          *  admission control. The spec disallows downgrading to an AC,
 308          *  which is enabled due to a completed admission control.
 309          *  Unadmitted traffic is not to be sent on an AC with admitted
 310          *  traffic.
 311          */
 312         for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
 313                 ac_status = &priv->wmm.ac_status[down_ac];
 314
 315                 if (!ac_status->disabled && !ac_status->flow_required)
 316                         /* AC is enabled and does not require admission
 317                            control */
 318                         ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
 319         }
 320
 321         return ret_ac;
 322 }
 323
 324 /*
 325  * This function downgrades WMM priority queue.
 326  */
 327 void
 328 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
 329 {
 330         int ac_val;
 331
 332         mwifiex_dbg(priv->adapter, INFO, "info: WMM: AC Priorities:\t"
 333                     "BK(0), BE(1), VI(2), VO(3)\n");
 334
 335         if (!priv->wmm_enabled) {
 336                 /* WMM is not enabled, default priorities */
 337                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
 338                         priv->wmm.ac_down_graded_vals[ac_val] =
 339                                                 (enum mwifiex_wmm_ac_e) ac_val;
 340         } else {
 341                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
 342                         priv->wmm.ac_down_graded_vals[ac_val]
 343                                 = mwifiex_wmm_eval_downgrade_ac(priv,
 344                                                 (enum mwifiex_wmm_ac_e) ac_val);
 345                         mwifiex_dbg(priv->adapter, INFO,
 346                                     "info: WMM: AC PRIO %d maps to %d\n",
 347                                     ac_val,
 348                                     priv->wmm.ac_down_graded_vals[ac_val]);
 349                 }
 350         }
 351 }
 352
 353 /*
 354  * This function converts the IP TOS field to an WMM AC
 355  * Queue assignment.
 356  */
 357 static enum mwifiex_wmm_ac_e
 358 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
 359 {
 360         /* Map of TOS UP values to WMM AC */
 361         const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
 362                 WMM_AC_BK,
 363                 WMM_AC_BK,
 364                 WMM_AC_BE,
 365                 WMM_AC_VI,
 366                 WMM_AC_VI,
 367                 WMM_AC_VO,
 368                 WMM_AC_VO
 369         };
 370
 371         if (tos >= ARRAY_SIZE(tos_to_ac))
 372                 return WMM_AC_BE;
 373
 374         return tos_to_ac[tos];
 375 }
 376
 377 /*
 378  * This function evaluates a given TID and downgrades it to a lower
 379  * TID if the WMM Parameter IE received from the AP indicates that the
 380  * AP is disabled (due to call admission control (ACM bit). Mapping
 381  * of TID to AC is taken care of internally.
 382  */
 383 u8 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
 384 {
 385         enum mwifiex_wmm_ac_e ac, ac_down;
 386         u8 new_tid;
 387
 388         ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
 389         ac_down = priv->wmm.ac_down_graded_vals[ac];
 390
 391         /* Send the index to tid array, picking from the array will be
 392          * taken care by dequeuing function
 393          */
 394         new_tid = ac_to_tid[ac_down][tid % 2];
 395
 396         return new_tid;
 397 }
 398
 399 /*
 400  * This function initializes the WMM state information and the
 401  * WMM data path queues.
 402  */
 403 void
 404 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
 405 {
 406         int i, j;
 407         struct mwifiex_private *priv;
 408
 409         for (j = 0; j < adapter->priv_num; ++j) {
 410                 priv = adapter->priv[j];
 411                 if (!priv)
 412                         continue;
 413
 414                 for (i = 0; i < MAX_NUM_TID; ++i) {
 415                         if (!disable_tx_amsdu &&
 416                             adapter->tx_buf_size > MWIFIEX_TX_DATA_BUF_SIZE_2K)
 417                                 priv->aggr_prio_tbl[i].amsdu =
 418                                                         priv->tos_to_tid_inv[i];
 419                         else
 420                                 priv->aggr_prio_tbl[i].amsdu =
 421                                                         BA_STREAM_NOT_ALLOWED;
 422                         priv->aggr_prio_tbl[i].ampdu_ap =
 423                                                         priv->tos_to_tid_inv[i];
 424                         priv->aggr_prio_tbl[i].ampdu_user =
 425                                                         priv->tos_to_tid_inv[i];
 426                 }
 427
 428                 priv->aggr_prio_tbl[6].amsdu
 429                                         = priv->aggr_prio_tbl[6].ampdu_ap
 430                                         = priv->aggr_prio_tbl[6].ampdu_user
 431                                         = BA_STREAM_NOT_ALLOWED;
 432
 433                 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
 434                                         = priv->aggr_prio_tbl[7].ampdu_user
 435                                         = BA_STREAM_NOT_ALLOWED;
 436
 437                 mwifiex_set_ba_params(priv);
 438                 mwifiex_reset_11n_rx_seq_num(priv);
 439
 440                 atomic_set(&priv->wmm.tx_pkts_queued, 0);
 441                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 442         }
 443 }
 444
 445 int mwifiex_bypass_txlist_empty(struct mwifiex_adapter *adapter)
 446 {
 447         return atomic_read(&adapter->bypass_tx_pending) ? false : true;
 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 && !priv->port_open)
 462                         continue;
 463                 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
 464                         return false;
 465         }
 466
 467         return true;
 468 }
 469
 470 /*
 471  * This function deletes all packets in an RA list node.
 472  *
 473  * The packet sent completion callback handler are called with
 474  * status failure, after they are dequeued to ensure proper
 475  * cleanup. The RA list node itself is freed at the end.
 476  */
 477 static void
 478 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
 479                                     struct mwifiex_ra_list_tbl *ra_list)
 480 {
 481         struct mwifiex_adapter *adapter = priv->adapter;
 482         struct sk_buff *skb, *tmp;
 483
 484         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
 485                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 486 }
 487
 488 /*
 489  * This function deletes all packets in an RA list.
 490  *
 491  * Each nodes in the RA list are freed individually first, and then
 492  * the RA list itself is freed.
 493  */
 494 static void
 495 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
 496                                struct list_head *ra_list_head)
 497 {
 498         struct mwifiex_ra_list_tbl *ra_list;
 499
 500         list_for_each_entry(ra_list, ra_list_head, list)
 501                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 502 }
 503
 504 /*
 505  * This function deletes all packets in all RA lists.
 506  */
 507 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
 508 {
 509         int i;
 510
 511         for (i = 0; i < MAX_NUM_TID; i++)
 512                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
 513                                                                        ra_list);
 514
 515         atomic_set(&priv->wmm.tx_pkts_queued, 0);
 516         atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 517 }
 518
 519 /*
 520  * This function deletes all route addresses from all RA lists.
 521  */
 522 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
 523 {
 524         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
 525         int i;
 526
 527         for (i = 0; i < MAX_NUM_TID; ++i) {
 528                 mwifiex_dbg(priv->adapter, INFO,
 529                             "info: ra_list: freeing buf for tid %d\n", i);
 530                 list_for_each_entry_safe(ra_list, tmp_node,
 531                                          &priv->wmm.tid_tbl_ptr[i].ra_list,
 532                                          list) {
 533                         list_del(&ra_list->list);
 534                         kfree(ra_list);
 535                 }
 536
 537                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
 538         }
 539 }
 540
 541 static int mwifiex_free_ack_frame(int id, void *p, void *data)
 542 {
 543         pr_warn("Have pending ack frames!\n");
 544         kfree_skb(p);
 545         return 0;
 546 }
 547
 548 /*
 549  * This function cleans up the Tx and Rx queues.
 550  *
 551  * Cleanup includes -
 552  *      - All packets in RA lists
 553  *      - All entries in Rx reorder table
 554  *      - All entries in Tx BA stream table
 555  *      - MPA buffer (if required)
 556  *      - All RA lists
 557  */
 558 void
 559 mwifiex_clean_txrx(struct mwifiex_private *priv)
 560 {
 561         unsigned long flags;
 562         struct sk_buff *skb, *tmp;
 563
 564         mwifiex_11n_cleanup_reorder_tbl(priv);
 565         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 566
 567         mwifiex_wmm_cleanup_queues(priv);
 568         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
 569
 570         if (priv->adapter->if_ops.cleanup_mpa_buf)
 571                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
 572
 573         mwifiex_wmm_delete_all_ralist(priv);
 574         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 575
 576         if (priv->adapter->if_ops.clean_pcie_ring &&
 577             !priv->adapter->surprise_removed)
 578                 priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
 579         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 580
 581         skb_queue_walk_safe(&priv->tdls_txq, skb, tmp)
 582                 mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
 583
 584         skb_queue_walk_safe(&priv->bypass_txq, skb, tmp)
 585                 mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
 586         atomic_set(&priv->adapter->bypass_tx_pending, 0);
 587
 588         idr_for_each(&priv->ack_status_frames, mwifiex_free_ack_frame, NULL);
 589         idr_destroy(&priv->ack_status_frames);
 590 }
 591
 592 /*
 593  * This function retrieves a particular RA list node, matching with the
 594  * given TID and RA address.
 595  */
 596 struct mwifiex_ra_list_tbl *
 597 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
 598                             const u8 *ra_addr)
 599 {
 600         struct mwifiex_ra_list_tbl *ra_list;
 601
 602         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
 603                             list) {
 604                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
 605                         return ra_list;
 606         }
 607
 608         return NULL;
 609 }
 610
 611 void mwifiex_update_ralist_tx_pause(struct mwifiex_private *priv, u8 *mac,
 612                                     u8 tx_pause)
 613 {
 614         struct mwifiex_ra_list_tbl *ra_list;
 615         u32 pkt_cnt = 0, tx_pkts_queued;
 616         unsigned long flags;
 617         int i;
 618
 619         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 620
 621         for (i = 0; i < MAX_NUM_TID; ++i) {
 622                 ra_list = mwifiex_wmm_get_ralist_node(priv, i, mac);
 623                 if (ra_list && ra_list->tx_paused != tx_pause) {
 624                         pkt_cnt += ra_list->total_pkt_count;
 625                         ra_list->tx_paused = tx_pause;
 626                         if (tx_pause)
 627                                 priv->wmm.pkts_paused[i] +=
 628                                         ra_list->total_pkt_count;
 629                         else
 630                                 priv->wmm.pkts_paused[i] -=
 631                                         ra_list->total_pkt_count;
 632                 }
 633         }
 634
 635         if (pkt_cnt) {
 636                 tx_pkts_queued = atomic_read(&priv->wmm.tx_pkts_queued);
 637                 if (tx_pause)
 638                         tx_pkts_queued -= pkt_cnt;
 639                 else
 640                         tx_pkts_queued += pkt_cnt;
 641
 642                 atomic_set(&priv->wmm.tx_pkts_queued, tx_pkts_queued);
 643                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 644         }
 645         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 646 }
 647
 648 /* This function update non-tdls peer ralist tx_pause while
 649  * tdls channel swithing
 650  */
 651 void mwifiex_update_ralist_tx_pause_in_tdls_cs(struct mwifiex_private *priv,
 652                                                u8 *mac, u8 tx_pause)
 653 {
 654         struct mwifiex_ra_list_tbl *ra_list;
 655         u32 pkt_cnt = 0, tx_pkts_queued;
 656         unsigned long flags;
 657         int i;
 658
 659         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 660
 661         for (i = 0; i < MAX_NUM_TID; ++i) {
 662                 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[i].ra_list,
 663                                     list) {
 664                         if (!memcmp(ra_list->ra, mac, ETH_ALEN))
 665                                 continue;
 666
 667                         if (ra_list && ra_list->tx_paused != tx_pause) {
 668                                 pkt_cnt += ra_list->total_pkt_count;
 669                                 ra_list->tx_paused = tx_pause;
 670                                 if (tx_pause)
 671                                         priv->wmm.pkts_paused[i] +=
 672                                                 ra_list->total_pkt_count;
 673                                 else
 674                                         priv->wmm.pkts_paused[i] -=
 675                                                 ra_list->total_pkt_count;
 676                         }
 677                 }
 678         }
 679
 680         if (pkt_cnt) {
 681                 tx_pkts_queued = atomic_read(&priv->wmm.tx_pkts_queued);
 682                 if (tx_pause)
 683                         tx_pkts_queued -= pkt_cnt;
 684                 else
 685                         tx_pkts_queued += pkt_cnt;
 686
 687                 atomic_set(&priv->wmm.tx_pkts_queued, tx_pkts_queued);
 688                 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
 689         }
 690         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 691 }
 692
 693 /*
 694  * This function retrieves an RA list node for a given TID and
 695  * RA address pair.
 696  *
 697  * If no such node is found, a new node is added first and then
 698  * retrieved.
 699  */
 700 struct mwifiex_ra_list_tbl *
 701 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid,
 702                             const u8 *ra_addr)
 703 {
 704         struct mwifiex_ra_list_tbl *ra_list;
 705
 706         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 707         if (ra_list)
 708                 return ra_list;
 709         mwifiex_ralist_add(priv, ra_addr);
 710
 711         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
 712 }
 713
 714 /*
 715  * This function deletes RA list nodes for given mac for all TIDs.
 716  * Function also decrements TX pending count accordingly.
 717  */
 718 void
 719 mwifiex_wmm_del_peer_ra_list(struct mwifiex_private *priv, const u8 *ra_addr)
 720 {
 721         struct mwifiex_ra_list_tbl *ra_list;
 722         unsigned long flags;
 723         int i;
 724
 725         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 726
 727         for (i = 0; i < MAX_NUM_TID; ++i) {
 728                 ra_list = mwifiex_wmm_get_ralist_node(priv, i, ra_addr);
 729
 730                 if (!ra_list)
 731                         continue;
 732                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
 733                 atomic_sub(ra_list->total_pkt_count, &priv->wmm.tx_pkts_queued);
 734                 list_del(&ra_list->list);
 735                 kfree(ra_list);
 736         }
 737         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 738 }
 739
 740 /*
 741  * This function checks if a particular RA list node exists in a given TID
 742  * table index.
 743  */
 744 int
 745 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
 746                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
 747 {
 748         struct mwifiex_ra_list_tbl *rlist;
 749
 750         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
 751                             list) {
 752                 if (rlist == ra_list)
 753                         return true;
 754         }
 755
 756         return false;
 757 }
 758
 759 /*
 760  * This function adds a packet to bypass TX queue.
 761  * This is special TX queue for packets which can be sent even when port_open
 762  * is false.
 763  */
 764 void
 765 mwifiex_wmm_add_buf_bypass_txqueue(struct mwifiex_private *priv,
 766                                    struct sk_buff *skb)
 767 {
 768         skb_queue_tail(&priv->bypass_txq, skb);
 769 }
 770
 771 /*
 772  * This function adds a packet to WMM queue.
 773  *
 774  * In disconnected state the packet is immediately dropped and the
 775  * packet send completion callback is called with status failure.
 776  *
 777  * Otherwise, the correct RA list node is located and the packet
 778  * is queued at the list tail.
 779  */
 780 void
 781 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
 782                             struct sk_buff *skb)
 783 {
 784         struct mwifiex_adapter *adapter = priv->adapter;
 785         u32 tid;
 786         struct mwifiex_ra_list_tbl *ra_list;
 787         u8 ra[ETH_ALEN], tid_down;
 788         unsigned long flags;
 789         struct list_head list_head;
 790         int tdls_status = TDLS_NOT_SETUP;
 791         struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
 792         struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
 793
 794         memcpy(ra, eth_hdr->h_dest, ETH_ALEN);
 795
 796         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
 797             ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) {
 798                 if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS)
 799                         mwifiex_dbg(adapter, DATA,
 800                                     "TDLS setup packet for %pM.\t"
 801                                     "Don't block\n", ra);
 802                 else if (memcmp(priv->cfg_bssid, ra, ETH_ALEN))
 803                         tdls_status = mwifiex_get_tdls_link_status(priv, ra);
 804         }
 805
 806         if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
 807                 mwifiex_dbg(adapter, DATA, "data: drop packet in disconnect\n");
 808                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 809                 return;
 810         }
 811
 812         tid = skb->priority;
 813
 814         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
 815
 816         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 817
 818         /* In case of infra as we have already created the list during
 819            association we just don't have to call get_queue_raptr, we will
 820            have only 1 raptr for a tid in case of infra */
 821         if (!mwifiex_queuing_ra_based(priv) &&
 822             !mwifiex_is_skb_mgmt_frame(skb)) {
 823                 switch (tdls_status) {
 824                 case TDLS_SETUP_COMPLETE:
 825                 case TDLS_CHAN_SWITCHING:
 826                 case TDLS_IN_BASE_CHAN:
 827                 case TDLS_IN_OFF_CHAN:
 828                         ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down,
 829                                                               ra);
 830                         tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
 831                         break;
 832                 case TDLS_SETUP_INPROGRESS:
 833                         skb_queue_tail(&priv->tdls_txq, skb);
 834                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
 835                                                flags);
 836                         return;
 837                 default:
 838                         list_head = priv->wmm.tid_tbl_ptr[tid_down].ra_list;
 839                         if (!list_empty(&list_head))
 840                                 ra_list = list_first_entry(
 841                                         &list_head, struct mwifiex_ra_list_tbl,
 842                                         list);
 843                         else
 844                                 ra_list = NULL;
 845                         break;
 846                 }
 847         } else {
 848                 memcpy(ra, skb->data, ETH_ALEN);
 849                 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
 850                         eth_broadcast_addr(ra);
 851                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
 852         }
 853
 854         if (!ra_list) {
 855                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 856                 mwifiex_write_data_complete(adapter, skb, 0, -1);
 857                 return;
 858         }
 859
 860         skb_queue_tail(&ra_list->skb_head, skb);
 861
 862         ra_list->ba_pkt_count++;
 863         ra_list->total_pkt_count++;
 864
 865         if (atomic_read(&priv->wmm.highest_queued_prio) <
 866                                                 priv->tos_to_tid_inv[tid_down])
 867                 atomic_set(&priv->wmm.highest_queued_prio,
 868                            priv->tos_to_tid_inv[tid_down]);
 869
 870         if (ra_list->tx_paused)
 871                 priv->wmm.pkts_paused[tid_down]++;
 872         else
 873                 atomic_inc(&priv->wmm.tx_pkts_queued);
 874
 875         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 876 }
 877
 878 /*
 879  * This function processes the get WMM status command response from firmware.
 880  *
 881  * The response may contain multiple TLVs -
 882  *      - AC Queue status TLVs
 883  *      - Current WMM Parameter IE TLV
 884  *      - Admission Control action frame TLVs
 885  *
 886  * This function parses the TLVs and then calls further specific functions
 887  * to process any changes in the queue prioritize or state.
 888  */
 889 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
 890                                const struct host_cmd_ds_command *resp)
 891 {
 892         u8 *curr = (u8 *) &resp->params.get_wmm_status;
 893         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
 894         int mask = IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK;
 895         bool valid = true;
 896
 897         struct mwifiex_ie_types_data *tlv_hdr;
 898         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
 899         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
 900         struct mwifiex_wmm_ac_status *ac_status;
 901
 902         mwifiex_dbg(priv->adapter, INFO,
 903                     "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
 904                     resp_len);
 905
 906         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
 907                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
 908                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
 909
 910                 if (resp_len < tlv_len + sizeof(tlv_hdr->header))
 911                         break;
 912
 913                 switch (le16_to_cpu(tlv_hdr->header.type)) {
 914                 case TLV_TYPE_WMMQSTATUS:
 915                         tlv_wmm_qstatus =
 916                                 (struct mwifiex_ie_types_wmm_queue_status *)
 917                                 tlv_hdr;
 918                         mwifiex_dbg(priv->adapter, CMD,
 919                                     "info: CMD_RESP: WMM_GET_STATUS:\t"
 920                                     "QSTATUS TLV: %d, %d, %d\n",
 921                                     tlv_wmm_qstatus->queue_index,
 922                                     tlv_wmm_qstatus->flow_required,
 923                                     tlv_wmm_qstatus->disabled);
 924
 925                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
 926                                                          queue_index];
 927                         ac_status->disabled = tlv_wmm_qstatus->disabled;
 928                         ac_status->flow_required =
 929                                                 tlv_wmm_qstatus->flow_required;
 930                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
 931                         break;
 932
 933                 case WLAN_EID_VENDOR_SPECIFIC:
 934                         /*
 935                          * Point the regular IEEE IE 2 bytes into the Marvell IE
 936                          *   and setup the IEEE IE type and length byte fields
 937                          */
 938
 939                         wmm_param_ie =
 940                                 (struct ieee_types_wmm_parameter *) (curr +
 941                                                                     2);
 942                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
 943                         wmm_param_ie->vend_hdr.element_id =
 944                                                 WLAN_EID_VENDOR_SPECIFIC;
 945
 946                         mwifiex_dbg(priv->adapter, CMD,
 947                                     "info: CMD_RESP: WMM_GET_STATUS:\t"
 948                                     "WMM Parameter Set Count: %d\n",
 949                                     wmm_param_ie->qos_info_bitmap & mask);
 950
 951                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
 952                                wmm_ie, wmm_param_ie,
 953                                wmm_param_ie->vend_hdr.len + 2);
 954
 955                         break;
 956
 957                 default:
 958                         valid = false;
 959                         break;
 960                 }
 961
 962                 curr += (tlv_len + sizeof(tlv_hdr->header));
 963                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
 964         }
 965
 966         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
 967         mwifiex_wmm_setup_ac_downgrade(priv);
 968
 969         return 0;
 970 }
 971
 972 /*
 973  * Callback handler from the command module to allow insertion of a WMM TLV.
 974  *
 975  * If the BSS we are associating to supports WMM, this function adds the
 976  * required WMM Information IE to the association request command buffer in
 977  * the form of a Marvell extended IEEE IE.
 978  */
 979 u32
 980 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
 981                                     u8 **assoc_buf,
 982                                     struct ieee_types_wmm_parameter *wmm_ie,
 983                                     struct ieee80211_ht_cap *ht_cap)
 984 {
 985         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
 986         u32 ret_len = 0;
 987
 988         /* Null checks */
 989         if (!assoc_buf)
 990                 return 0;
 991         if (!(*assoc_buf))
 992                 return 0;
 993
 994         if (!wmm_ie)
 995                 return 0;
 996
 997         mwifiex_dbg(priv->adapter, INFO,
 998                     "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
 999                     wmm_ie->vend_hdr.element_id);
1000
1001         if ((priv->wmm_required ||
1002              (ht_cap && (priv->adapter->config_bands & BAND_GN ||
1003              priv->adapter->config_bands & BAND_AN))) &&
1004             wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
1005                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
1006                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
1007                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
1008                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
1009                        le16_to_cpu(wmm_tlv->header.len));
1010                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
1011                         memcpy((u8 *) (wmm_tlv->wmm_ie
1012                                        + le16_to_cpu(wmm_tlv->header.len)
1013                                        - sizeof(priv->wmm_qosinfo)),
1014                                &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
1015
1016                 ret_len = sizeof(wmm_tlv->header)
1017                           + le16_to_cpu(wmm_tlv->header.len);
1018
1019                 *assoc_buf += ret_len;
1020         }
1021
1022         return ret_len;
1023 }
1024
1025 /*
1026  * This function computes the time delay in the driver queues for a
1027  * given packet.
1028  *
1029  * When the packet is received at the OS/Driver interface, the current
1030  * time is set in the packet structure. The difference between the present
1031  * time and that received time is computed in this function and limited
1032  * based on pre-compiled limits in the driver.
1033  */
1034 u8
1035 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
1036                                   const struct sk_buff *skb)
1037 {
1038         u32 queue_delay = ktime_to_ms(net_timedelta(skb->tstamp));
1039         u8 ret_val;
1040
1041         /*
1042          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
1043          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
1044          *
1045          * Pass max value if queue_delay is beyond the uint8 range
1046          */
1047         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
1048
1049         mwifiex_dbg(priv->adapter, DATA, "data: WMM: Pkt Delay: %d ms,\t"
1050                     "%d ms sent to FW\n", queue_delay, ret_val);
1051
1052         return ret_val;
1053 }
1054
1055 /*
1056  * This function retrieves the highest priority RA list table pointer.
1057  */
1058 static struct mwifiex_ra_list_tbl *
1059 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
1060                                      struct mwifiex_private **priv, int *tid)
1061 {
1062         struct mwifiex_private *priv_tmp;
1063         struct mwifiex_ra_list_tbl *ptr;
1064         struct mwifiex_tid_tbl *tid_ptr;
1065         atomic_t *hqp;
1066         unsigned long flags_ra;
1067         int i, j;
1068
1069         /* check the BSS with highest priority first */
1070         for (j = adapter->priv_num - 1; j >= 0; --j) {
1071                 /* iterate over BSS with the equal priority */
1072                 list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur,
1073                                     &adapter->bss_prio_tbl[j].bss_prio_head,
1074                                     list) {
1075
1076                         priv_tmp = adapter->bss_prio_tbl[j].bss_prio_cur->priv;
1077
1078                         if (!priv_tmp->port_open ||
1079                             (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0))
1080                                 continue;
1081
1082                         /* iterate over the WMM queues of the BSS */
1083                         hqp = &priv_tmp->wmm.highest_queued_prio;
1084                         for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
1085
1086                                 spin_lock_irqsave(&priv_tmp->wmm.
1087                                                   ra_list_spinlock, flags_ra);
1088
1089                                 tid_ptr = &(priv_tmp)->wmm.
1090                                         tid_tbl_ptr[tos_to_tid[i]];
1091
1092                                 /* iterate over receiver addresses */
1093                                 list_for_each_entry(ptr, &tid_ptr->ra_list,
1094                                                     list) {
1095
1096                                         if (!ptr->tx_paused &&
1097                                             !skb_queue_empty(&ptr->skb_head))
1098                                                 /* holds both locks */
1099                                                 goto found;
1100                                 }
1101
1102                                 spin_unlock_irqrestore(&priv_tmp->wmm.
1103                                                        ra_list_spinlock,
1104                                                        flags_ra);
1105                         }
1106                 }
1107
1108         }
1109
1110         return NULL;
1111
1112 found:
1113         /* holds ra_list_spinlock */
1114         if (atomic_read(hqp) > i)
1115                 atomic_set(hqp, i);
1116         spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags_ra);
1117
1118         *priv = priv_tmp;
1119         *tid = tos_to_tid[i];
1120
1121         return ptr;
1122 }
1123
1124 /* This functions rotates ra and bss lists so packets are picked round robin.
1125  *
1126  * After a packet is successfully transmitted, rotate the ra list, so the ra
1127  * next to the one transmitted, will come first in the list. This way we pick
1128  * the ra' in a round robin fashion. Same applies to bss nodes of equal
1129  * priority.
1130  *
1131  * Function also increments wmm.packets_out counter.
1132  */
1133 void mwifiex_rotate_priolists(struct mwifiex_private *priv,
1134                                  struct mwifiex_ra_list_tbl *ra,
1135                                  int tid)
1136 {
1137         struct mwifiex_adapter *adapter = priv->adapter;
1138         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
1139         struct mwifiex_tid_tbl *tid_ptr = &priv->wmm.tid_tbl_ptr[tid];
1140         unsigned long flags;
1141
1142         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
1143         /*
1144          * dirty trick: we remove 'head' temporarily and reinsert it after
1145          * curr bss node. imagine list to stay fixed while head is moved
1146          */
1147         list_move(&tbl[priv->bss_priority].bss_prio_head,
1148                   &tbl[priv->bss_priority].bss_prio_cur->list);
1149         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
1150
1151         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1152         if (mwifiex_is_ralist_valid(priv, ra, tid)) {
1153                 priv->wmm.packets_out[tid]++;
1154                 /* same as above */
1155                 list_move(&tid_ptr->ra_list, &ra->list);
1156         }
1157         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1158 }
1159
1160 /*
1161  * This function checks if 11n aggregation is possible.
1162  */
1163 static int
1164 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
1165                                     struct mwifiex_ra_list_tbl *ptr,
1166                                     int max_buf_size)
1167 {
1168         int count = 0, total_size = 0;
1169         struct sk_buff *skb, *tmp;
1170         int max_amsdu_size;
1171
1172         if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled &&
1173             ptr->is_11n_enabled)
1174                 max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
1175         else
1176                 max_amsdu_size = max_buf_size;
1177
1178         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
1179                 total_size += skb->len;
1180                 if (total_size >= max_amsdu_size)
1181                         break;
1182                 if (++count >= MIN_NUM_AMSDU)
1183                         return true;
1184         }
1185
1186         return false;
1187 }
1188
1189 /*
1190  * This function sends a single packet to firmware for transmission.
1191  */
1192 static void
1193 mwifiex_send_single_packet(struct mwifiex_private *priv,
1194                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1195                            unsigned long ra_list_flags)
1196                            __releases(&priv->wmm.ra_list_spinlock)
1197 {
1198         struct sk_buff *skb, *skb_next;
1199         struct mwifiex_tx_param tx_param;
1200         struct mwifiex_adapter *adapter = priv->adapter;
1201         struct mwifiex_txinfo *tx_info;
1202
1203         if (skb_queue_empty(&ptr->skb_head)) {
1204                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1205                                        ra_list_flags);
1206                 mwifiex_dbg(adapter, DATA, "data: nothing to send\n");
1207                 return;
1208         }
1209
1210         skb = skb_dequeue(&ptr->skb_head);
1211
1212         tx_info = MWIFIEX_SKB_TXCB(skb);
1213         mwifiex_dbg(adapter, DATA,
1214                     "data: dequeuing the packet %p %p\n", ptr, skb);
1215
1216         ptr->total_pkt_count--;
1217
1218         if (!skb_queue_empty(&ptr->skb_head))
1219                 skb_next = skb_peek(&ptr->skb_head);
1220         else
1221                 skb_next = NULL;
1222
1223         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1224
1225         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1226                                 sizeof(struct txpd) : 0);
1227
1228         if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1229                 /* Queue the packet back at the head */
1230                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1231
1232                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1233                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1234                                                ra_list_flags);
1235                         mwifiex_write_data_complete(adapter, skb, 0, -1);
1236                         return;
1237                 }
1238
1239                 skb_queue_tail(&ptr->skb_head, skb);
1240
1241                 ptr->total_pkt_count++;
1242                 ptr->ba_pkt_count++;
1243                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1244                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1245                                        ra_list_flags);
1246         } else {
1247                 mwifiex_rotate_priolists(priv, ptr, ptr_index);
1248                 atomic_dec(&priv->wmm.tx_pkts_queued);
1249         }
1250 }
1251
1252 /*
1253  * This function checks if the first packet in the given RA list
1254  * is already processed or not.
1255  */
1256 static int
1257 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1258                          struct mwifiex_ra_list_tbl *ptr)
1259 {
1260         struct sk_buff *skb;
1261         struct mwifiex_txinfo *tx_info;
1262
1263         if (skb_queue_empty(&ptr->skb_head))
1264                 return false;
1265
1266         skb = skb_peek(&ptr->skb_head);
1267
1268         tx_info = MWIFIEX_SKB_TXCB(skb);
1269         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1270                 return true;
1271
1272         return false;
1273 }
1274
1275 /*
1276  * This function sends a single processed packet to firmware for
1277  * transmission.
1278  */
1279 static void
1280 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1281                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1282                               unsigned long ra_list_flags)
1283                                 __releases(&priv->wmm.ra_list_spinlock)
1284 {
1285         struct mwifiex_tx_param tx_param;
1286         struct mwifiex_adapter *adapter = priv->adapter;
1287         int ret = -1;
1288         struct sk_buff *skb, *skb_next;
1289         struct mwifiex_txinfo *tx_info;
1290
1291         if (skb_queue_empty(&ptr->skb_head)) {
1292                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1293                                        ra_list_flags);
1294                 return;
1295         }
1296
1297         skb = skb_dequeue(&ptr->skb_head);
1298
1299         if (adapter->data_sent || adapter->tx_lock_flag) {
1300                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1301                                        ra_list_flags);
1302                 skb_queue_tail(&adapter->tx_data_q, skb);
1303                 atomic_inc(&adapter->tx_queued);
1304                 return;
1305         }
1306
1307         if (!skb_queue_empty(&ptr->skb_head))
1308                 skb_next = skb_peek(&ptr->skb_head);
1309         else
1310                 skb_next = NULL;
1311
1312         tx_info = MWIFIEX_SKB_TXCB(skb);
1313
1314         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1315
1316         if (adapter->iface_type == MWIFIEX_USB) {
1317                 adapter->data_sent = true;
1318                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
1319                                                    skb, NULL);
1320         } else {
1321                 tx_param.next_pkt_len =
1322                         ((skb_next) ? skb_next->len +
1323                          sizeof(struct txpd) : 0);
1324                 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1325                                                    skb, &tx_param);
1326         }
1327
1328         switch (ret) {
1329         case -EBUSY:
1330                 mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
1331                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1332
1333                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1334                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1335                                                ra_list_flags);
1336                         mwifiex_write_data_complete(adapter, skb, 0, -1);
1337                         return;
1338                 }
1339
1340                 skb_queue_tail(&ptr->skb_head, skb);
1341
1342                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1343                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1344                                        ra_list_flags);
1345                 break;
1346         case -1:
1347                 if (adapter->iface_type != MWIFIEX_PCIE)
1348                         adapter->data_sent = false;
1349                 mwifiex_dbg(adapter, ERROR, "host_to_card failed: %#x\n", ret);
1350                 adapter->dbg.num_tx_host_to_card_failure++;
1351                 mwifiex_write_data_complete(adapter, skb, 0, ret);
1352                 break;
1353         case -EINPROGRESS:
1354                 if (adapter->iface_type != MWIFIEX_PCIE)
1355                         adapter->data_sent = false;
1356                 break;
1357         case 0:
1358                 mwifiex_write_data_complete(adapter, skb, 0, ret);
1359         default:
1360                 break;
1361         }
1362         if (ret != -EBUSY) {
1363                 mwifiex_rotate_priolists(priv, ptr, ptr_index);
1364                 atomic_dec(&priv->wmm.tx_pkts_queued);
1365         }
1366 }
1367
1368 /*
1369  * This function dequeues a packet from the highest priority list
1370  * and transmits it.
1371  */
1372 static int
1373 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1374 {
1375         struct mwifiex_ra_list_tbl *ptr;
1376         struct mwifiex_private *priv = NULL;
1377         int ptr_index = 0;
1378         u8 ra[ETH_ALEN];
1379         int tid_del = 0, tid = 0;
1380         unsigned long flags;
1381
1382         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1383         if (!ptr)
1384                 return -1;
1385
1386         tid = mwifiex_get_tid(ptr);
1387
1388         mwifiex_dbg(adapter, DATA, "data: tid=%d\n", tid);
1389
1390         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1391         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1392                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1393                 return -1;
1394         }
1395
1396         if (mwifiex_is_ptr_processed(priv, ptr)) {
1397                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1398                 /* ra_list_spinlock has been freed in
1399                    mwifiex_send_processed_packet() */
1400                 return 0;
1401         }
1402
1403         if (!ptr->is_11n_enabled ||
1404                 ptr->ba_status ||
1405                 priv->wps.session_enable) {
1406                 if (ptr->is_11n_enabled &&
1407                         ptr->ba_status &&
1408                         ptr->amsdu_in_ampdu &&
1409                         mwifiex_is_amsdu_allowed(priv, tid) &&
1410                         mwifiex_is_11n_aggragation_possible(priv, ptr,
1411                                                         adapter->tx_buf_size))
1412                         mwifiex_11n_aggregate_pkt(priv, ptr, ptr_index, flags);
1413                         /* ra_list_spinlock has been freed in
1414                          * mwifiex_11n_aggregate_pkt()
1415                          */
1416                 else
1417                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1418                         /* ra_list_spinlock has been freed in
1419                          * mwifiex_send_single_packet()
1420                          */
1421         } else {
1422                 if (mwifiex_is_ampdu_allowed(priv, ptr, tid) &&
1423                     ptr->ba_pkt_count > ptr->ba_packet_thr) {
1424                         if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1425                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1426                                                       BA_SETUP_INPROGRESS);
1427                                 mwifiex_send_addba(priv, tid, ptr->ra);
1428                         } else if (mwifiex_find_stream_to_delete
1429                                    (priv, tid, &tid_del, ra)) {
1430                                 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1431                                                       BA_SETUP_INPROGRESS);
1432                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1433                         }
1434                 }
1435                 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1436                     mwifiex_is_11n_aggragation_possible(priv, ptr,
1437                                                         adapter->tx_buf_size))
1438                         mwifiex_11n_aggregate_pkt(priv, ptr, ptr_index, flags);
1439                         /* ra_list_spinlock has been freed in
1440                            mwifiex_11n_aggregate_pkt() */
1441                 else
1442                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1443                         /* ra_list_spinlock has been freed in
1444                            mwifiex_send_single_packet() */
1445         }
1446         return 0;
1447 }
1448
1449 void mwifiex_process_bypass_tx(struct mwifiex_adapter *adapter)
1450 {
1451         struct mwifiex_tx_param tx_param;
1452         struct sk_buff *skb;
1453         struct mwifiex_txinfo *tx_info;
1454         struct mwifiex_private *priv;
1455         int i;
1456
1457         if (adapter->data_sent || adapter->tx_lock_flag)
1458                 return;
1459
1460         for (i = 0; i < adapter->priv_num; ++i) {
1461                 priv = adapter->priv[i];
1462
1463                 if (skb_queue_empty(&priv->bypass_txq))
1464                         continue;
1465
1466                 skb = skb_dequeue(&priv->bypass_txq);
1467                 tx_info = MWIFIEX_SKB_TXCB(skb);
1468
1469                 /* no aggregation for bypass packets */
1470                 tx_param.next_pkt_len = 0;
1471
1472                 if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1473                         skb_queue_head(&priv->bypass_txq, skb);
1474                         tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1475                 } else {
1476                         atomic_dec(&adapter->bypass_tx_pending);
1477                 }
1478         }
1479 }
1480
1481 /*
1482  * This function transmits the highest priority packet awaiting in the
1483  * WMM Queues.
1484  */
1485 void
1486 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1487 {
1488         do {
1489                 if (mwifiex_dequeue_tx_packet(adapter))
1490                         break;
1491                 if (adapter->iface_type != MWIFIEX_SDIO) {
1492                         if (adapter->data_sent ||
1493                             adapter->tx_lock_flag)
1494                                 break;
1495                 } else {
1496                         if (atomic_read(&adapter->tx_queued) >=
1497                             MWIFIEX_MAX_PKTS_TXQ)
1498                                 break;
1499                 }
1500         } while (!mwifiex_wmm_lists_empty(adapter));
1501 }