drivers/net/wireless/mwifiex/11n.c

   1 /*
   2  * Marvell Wireless LAN device driver: 802.11n
   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  * Fills HT capability information field, AMPDU Parameters field, HT extended
  30  * capability field, and supported MCS set fields.
  31  *
  32  * HT capability information field, AMPDU Parameters field, supported MCS set
  33  * fields are retrieved from cfg80211 stack
  34  *
  35  * RD responder bit to set to clear in the extended capability header.
  36  */
  37 int mwifiex_fill_cap_info(struct mwifiex_private *priv, u8 radio_type,
  38                           struct ieee80211_ht_cap *ht_cap)
  39 {
  40         uint16_t ht_ext_cap = le16_to_cpu(ht_cap->extended_ht_cap_info);
  41         struct ieee80211_supported_band *sband =
  42                                         priv->wdev.wiphy->bands[radio_type];
  43
  44         if (WARN_ON_ONCE(!sband)) {
  45                 mwifiex_dbg(priv->adapter, ERROR, "Invalid radio type!\n");
  46                 return -EINVAL;
  47         }
  48
  49         ht_cap->ampdu_params_info =
  50                 (sband->ht_cap.ampdu_factor &
  51                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
  52                 ((sband->ht_cap.ampdu_density <<
  53                  IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT) &
  54                  IEEE80211_HT_AMPDU_PARM_DENSITY);
  55
  56         memcpy((u8 *)&ht_cap->mcs, &sband->ht_cap.mcs,
  57                sizeof(sband->ht_cap.mcs));
  58
  59         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
  60             (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
  61              (priv->adapter->sec_chan_offset !=
  62                                         IEEE80211_HT_PARAM_CHA_SEC_NONE)))
  63                 /* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
  64                 SETHT_MCS32(ht_cap->mcs.rx_mask);
  65
  66         /* Clear RD responder bit */
  67         ht_ext_cap &= ~IEEE80211_HT_EXT_CAP_RD_RESPONDER;
  68
  69         ht_cap->cap_info = cpu_to_le16(sband->ht_cap.cap);
  70         ht_cap->extended_ht_cap_info = cpu_to_le16(ht_ext_cap);
  71
  72         if (ISSUPP_BEAMFORMING(priv->adapter->hw_dot_11n_dev_cap))
  73                 ht_cap->tx_BF_cap_info = cpu_to_le32(MWIFIEX_DEF_11N_TX_BF_CAP);
  74
  75         return 0;
  76 }
  77
  78 /*
  79  * This function returns the pointer to an entry in BA Stream
  80  * table which matches the requested BA status.
  81  */
  82 static struct mwifiex_tx_ba_stream_tbl *
  83 mwifiex_get_ba_status(struct mwifiex_private *priv,
  84                       enum mwifiex_ba_status ba_status)
  85 {
  86         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
  87         unsigned long flags;
  88
  89         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
  90         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
  91                 if (tx_ba_tsr_tbl->ba_status == ba_status) {
  92                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
  93                                                flags);
  94                         return tx_ba_tsr_tbl;
  95                 }
  96         }
  97         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
  98         return NULL;
  99 }
 100
 101 /*
 102  * This function handles the command response of delete a block
 103  * ack request.
 104  *
 105  * The function checks the response success status and takes action
 106  * accordingly (send an add BA request in case of success, or recreate
 107  * the deleted stream in case of failure, if the add BA was also
 108  * initiated by us).
 109  */
 110 int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
 111                           struct host_cmd_ds_command *resp)
 112 {
 113         int tid;
 114         struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
 115         struct host_cmd_ds_11n_delba *del_ba = &resp->params.del_ba;
 116         uint16_t del_ba_param_set = le16_to_cpu(del_ba->del_ba_param_set);
 117
 118         tid = del_ba_param_set >> DELBA_TID_POS;
 119         if (del_ba->del_result == BA_RESULT_SUCCESS) {
 120                 mwifiex_del_ba_tbl(priv, tid, del_ba->peer_mac_addr,
 121                                    TYPE_DELBA_SENT,
 122                                    INITIATOR_BIT(del_ba_param_set));
 123
 124                 tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
 125                 if (tx_ba_tbl)
 126                         mwifiex_send_addba(priv, tx_ba_tbl->tid,
 127                                            tx_ba_tbl->ra);
 128         } else { /*
 129                   * In case of failure, recreate the deleted stream in case
 130                   * we initiated the ADDBA
 131                   */
 132                 if (!INITIATOR_BIT(del_ba_param_set))
 133                         return 0;
 134
 135                 mwifiex_create_ba_tbl(priv, del_ba->peer_mac_addr, tid,
 136                                       BA_SETUP_INPROGRESS);
 137
 138                 tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
 139
 140                 if (tx_ba_tbl)
 141                         mwifiex_del_ba_tbl(priv, tx_ba_tbl->tid, tx_ba_tbl->ra,
 142                                            TYPE_DELBA_SENT, true);
 143         }
 144
 145         return 0;
 146 }
 147
 148 /*
 149  * This function handles the command response of add a block
 150  * ack request.
 151  *
 152  * Handling includes changing the header fields to CPU formats, checking
 153  * the response success status and taking actions accordingly (delete the
 154  * BA stream table in case of failure).
 155  */
 156 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
 157                               struct host_cmd_ds_command *resp)
 158 {
 159         int tid, tid_down;
 160         struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
 161         struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
 162         struct mwifiex_ra_list_tbl *ra_list;
 163         u16 block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
 164
 165         add_ba_rsp->ssn = cpu_to_le16((le16_to_cpu(add_ba_rsp->ssn))
 166                         & SSN_MASK);
 167
 168         tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
 169                >> BLOCKACKPARAM_TID_POS;
 170
 171         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 172         ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, add_ba_rsp->
 173                 peer_mac_addr);
 174         if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) {
 175                 if (ra_list) {
 176                         ra_list->ba_status = BA_SETUP_NONE;
 177                         ra_list->amsdu_in_ampdu = false;
 178                 }
 179                 mwifiex_del_ba_tbl(priv, tid, add_ba_rsp->peer_mac_addr,
 180                                    TYPE_DELBA_SENT, true);
 181                 if (add_ba_rsp->add_rsp_result != BA_RESULT_TIMEOUT)
 182                         priv->aggr_prio_tbl[tid].ampdu_ap =
 183                                 BA_STREAM_NOT_ALLOWED;
 184                 return 0;
 185         }
 186
 187         tx_ba_tbl = mwifiex_get_ba_tbl(priv, tid, add_ba_rsp->peer_mac_addr);
 188         if (tx_ba_tbl) {
 189                 mwifiex_dbg(priv->adapter, EVENT, "info: BA stream complete\n");
 190                 tx_ba_tbl->ba_status = BA_SETUP_COMPLETE;
 191                 if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
 192                     priv->add_ba_param.tx_amsdu &&
 193                     (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
 194                         tx_ba_tbl->amsdu = true;
 195                 else
 196                         tx_ba_tbl->amsdu = false;
 197                 if (ra_list) {
 198                         ra_list->amsdu_in_ampdu = tx_ba_tbl->amsdu;
 199                         ra_list->ba_status = BA_SETUP_COMPLETE;
 200                 }
 201         } else {
 202                 mwifiex_dbg(priv->adapter, ERROR, "BA stream not created\n");
 203         }
 204
 205         return 0;
 206 }
 207
 208 /*
 209  * This function prepares command of reconfigure Tx buffer.
 210  *
 211  * Preparation includes -
 212  *      - Setting command ID, action and proper size
 213  *      - Setting Tx buffer size (for SET only)
 214  *      - Ensuring correct endian-ness
 215  */
 216 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
 217                              struct host_cmd_ds_command *cmd, int cmd_action,
 218                              u16 *buf_size)
 219 {
 220         struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
 221         u16 action = (u16) cmd_action;
 222
 223         cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
 224         cmd->size =
 225                 cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
 226         tx_buf->action = cpu_to_le16(action);
 227         switch (action) {
 228         case HostCmd_ACT_GEN_SET:
 229                 mwifiex_dbg(priv->adapter, CMD,
 230                             "cmd: set tx_buf=%d\n", *buf_size);
 231                 tx_buf->buff_size = cpu_to_le16(*buf_size);
 232                 break;
 233         case HostCmd_ACT_GEN_GET:
 234         default:
 235                 tx_buf->buff_size = 0;
 236                 break;
 237         }
 238         return 0;
 239 }
 240
 241 /*
 242  * This function prepares command of AMSDU aggregation control.
 243  *
 244  * Preparation includes -
 245  *      - Setting command ID, action and proper size
 246  *      - Setting AMSDU control parameters (for SET only)
 247  *      - Ensuring correct endian-ness
 248  */
 249 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
 250                                 int cmd_action,
 251                                 struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
 252 {
 253         struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 254                 &cmd->params.amsdu_aggr_ctrl;
 255         u16 action = (u16) cmd_action;
 256
 257         cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
 258         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
 259                                 + S_DS_GEN);
 260         amsdu_ctrl->action = cpu_to_le16(action);
 261         switch (action) {
 262         case HostCmd_ACT_GEN_SET:
 263                 amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
 264                 amsdu_ctrl->curr_buf_size = 0;
 265                 break;
 266         case HostCmd_ACT_GEN_GET:
 267         default:
 268                 amsdu_ctrl->curr_buf_size = 0;
 269                 break;
 270         }
 271         return 0;
 272 }
 273
 274 /*
 275  * This function prepares 11n configuration command.
 276  *
 277  * Preparation includes -
 278  *      - Setting command ID, action and proper size
 279  *      - Setting HT Tx capability and HT Tx information fields
 280  *      - Ensuring correct endian-ness
 281  */
 282 int mwifiex_cmd_11n_cfg(struct mwifiex_private *priv,
 283                         struct host_cmd_ds_command *cmd, u16 cmd_action,
 284                         struct mwifiex_ds_11n_tx_cfg *txcfg)
 285 {
 286         struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
 287
 288         cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
 289         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
 290         htcfg->action = cpu_to_le16(cmd_action);
 291         htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
 292         htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
 293
 294         if (priv->adapter->is_hw_11ac_capable)
 295                 htcfg->misc_config = cpu_to_le16(txcfg->misc_config);
 296
 297         return 0;
 298 }
 299
 300 /*
 301  * This function appends an 11n TLV to a buffer.
 302  *
 303  * Buffer allocation is responsibility of the calling
 304  * function. No size validation is made here.
 305  *
 306  * The function fills up the following sections, if applicable -
 307  *      - HT capability IE
 308  *      - HT information IE (with channel list)
 309  *      - 20/40 BSS Coexistence IE
 310  *      - HT Extended Capabilities IE
 311  */
 312 int
 313 mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 314                            struct mwifiex_bssdescriptor *bss_desc,
 315                            u8 **buffer)
 316 {
 317         struct mwifiex_ie_types_htcap *ht_cap;
 318         struct mwifiex_ie_types_htinfo *ht_info;
 319         struct mwifiex_ie_types_chan_list_param_set *chan_list;
 320         struct mwifiex_ie_types_2040bssco *bss_co_2040;
 321         struct mwifiex_ie_types_extcap *ext_cap;
 322         int ret_len = 0;
 323         struct ieee80211_supported_band *sband;
 324         struct ieee_types_header *hdr;
 325         u8 radio_type;
 326
 327         if (!buffer || !*buffer)
 328                 return ret_len;
 329
 330         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 331         sband = priv->wdev.wiphy->bands[radio_type];
 332
 333         if (bss_desc->bcn_ht_cap) {
 334                 ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
 335                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 336                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 337                 ht_cap->header.len =
 338                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 339                 memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
 340                        (u8 *)bss_desc->bcn_ht_cap,
 341                        le16_to_cpu(ht_cap->header.len));
 342
 343                 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
 344
 345                 *buffer += sizeof(struct mwifiex_ie_types_htcap);
 346                 ret_len += sizeof(struct mwifiex_ie_types_htcap);
 347         }
 348
 349         if (bss_desc->bcn_ht_oper) {
 350                 if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 351                         ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
 352                         memset(ht_info, 0,
 353                                sizeof(struct mwifiex_ie_types_htinfo));
 354                         ht_info->header.type =
 355                                         cpu_to_le16(WLAN_EID_HT_OPERATION);
 356                         ht_info->header.len =
 357                                 cpu_to_le16(
 358                                         sizeof(struct ieee80211_ht_operation));
 359
 360                         memcpy((u8 *) ht_info +
 361                                sizeof(struct mwifiex_ie_types_header),
 362                                (u8 *)bss_desc->bcn_ht_oper,
 363                                le16_to_cpu(ht_info->header.len));
 364
 365                         if (!(sband->ht_cap.cap &
 366                                         IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 367                                 ht_info->ht_oper.ht_param &=
 368                                         ~(IEEE80211_HT_PARAM_CHAN_WIDTH_ANY |
 369                                         IEEE80211_HT_PARAM_CHA_SEC_OFFSET);
 370
 371                         *buffer += sizeof(struct mwifiex_ie_types_htinfo);
 372                         ret_len += sizeof(struct mwifiex_ie_types_htinfo);
 373                 }
 374
 375                 chan_list =
 376                         (struct mwifiex_ie_types_chan_list_param_set *) *buffer;
 377                 memset(chan_list, 0,
 378                        sizeof(struct mwifiex_ie_types_chan_list_param_set));
 379                 chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 380                 chan_list->header.len = cpu_to_le16(
 381                         sizeof(struct mwifiex_ie_types_chan_list_param_set) -
 382                         sizeof(struct mwifiex_ie_types_header));
 383                 chan_list->chan_scan_param[0].chan_number =
 384                         bss_desc->bcn_ht_oper->primary_chan;
 385                 chan_list->chan_scan_param[0].radio_type =
 386                         mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 387
 388                 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
 389                     bss_desc->bcn_ht_oper->ht_param &
 390                     IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)
 391                         SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
 392                                           radio_type,
 393                                           (bss_desc->bcn_ht_oper->ht_param &
 394                                           IEEE80211_HT_PARAM_CHA_SEC_OFFSET));
 395
 396                 *buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 397                 ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 398         }
 399
 400         if (bss_desc->bcn_bss_co_2040) {
 401                 bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
 402                 memset(bss_co_2040, 0,
 403                        sizeof(struct mwifiex_ie_types_2040bssco));
 404                 bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
 405                 bss_co_2040->header.len =
 406                        cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));
 407
 408                 memcpy((u8 *) bss_co_2040 +
 409                        sizeof(struct mwifiex_ie_types_header),
 410                        bss_desc->bcn_bss_co_2040 +
 411                        sizeof(struct ieee_types_header),
 412                        le16_to_cpu(bss_co_2040->header.len));
 413
 414                 *buffer += sizeof(struct mwifiex_ie_types_2040bssco);
 415                 ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
 416         }
 417
 418         if (bss_desc->bcn_ext_cap) {
 419                 hdr = (void *)bss_desc->bcn_ext_cap;
 420                 ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
 421                 memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
 422                 ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
 423                 ext_cap->header.len = cpu_to_le16(hdr->len);
 424
 425                 memcpy((u8 *)ext_cap->ext_capab,
 426                        bss_desc->bcn_ext_cap + sizeof(struct ieee_types_header),
 427                        le16_to_cpu(ext_cap->header.len));
 428
 429                 if (hdr->len > 3 &&
 430                     ext_cap->ext_capab[3] & WLAN_EXT_CAPA4_INTERWORKING_ENABLED)
 431                         priv->hs2_enabled = true;
 432                 else
 433                         priv->hs2_enabled = false;
 434
 435                 *buffer += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
 436                 ret_len += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
 437         }
 438
 439         return ret_len;
 440 }
 441
 442 /*
 443  * This function checks if the given pointer is valid entry of
 444  * Tx BA Stream table.
 445  */
 446 static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
 447                                 struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
 448 {
 449         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 450
 451         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 452                 if (tx_ba_tsr_tbl == tx_tbl_ptr)
 453                         return true;
 454         }
 455
 456         return false;
 457 }
 458
 459 /*
 460  * This function deletes the given entry in Tx BA Stream table.
 461  *
 462  * The function also performs a validity check on the supplied
 463  * pointer before trying to delete.
 464  */
 465 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
 466                                 struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
 467 {
 468         if (!tx_ba_tsr_tbl &&
 469             mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
 470                 return;
 471
 472         mwifiex_dbg(priv->adapter, INFO,
 473                     "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
 474
 475         list_del(&tx_ba_tsr_tbl->list);
 476
 477         kfree(tx_ba_tsr_tbl);
 478 }
 479
 480 /*
 481  * This function deletes all the entries in Tx BA Stream table.
 482  */
 483 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
 484 {
 485         int i;
 486         struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
 487         unsigned long flags;
 488
 489         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 490         list_for_each_entry_safe(del_tbl_ptr, tmp_node,
 491                                  &priv->tx_ba_stream_tbl_ptr, list)
 492                 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
 493         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 494
 495         INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 496
 497         for (i = 0; i < MAX_NUM_TID; ++i)
 498                 priv->aggr_prio_tbl[i].ampdu_ap =
 499                         priv->aggr_prio_tbl[i].ampdu_user;
 500 }
 501
 502 /*
 503  * This function returns the pointer to an entry in BA Stream
 504  * table which matches the given RA/TID pair.
 505  */
 506 struct mwifiex_tx_ba_stream_tbl *
 507 mwifiex_get_ba_tbl(struct mwifiex_private *priv, int tid, u8 *ra)
 508 {
 509         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 510         unsigned long flags;
 511
 512         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 513         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 514                 if (ether_addr_equal_unaligned(tx_ba_tsr_tbl->ra, ra) &&
 515                     tx_ba_tsr_tbl->tid == tid) {
 516                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 517                                                flags);
 518                         return tx_ba_tsr_tbl;
 519                 }
 520         }
 521         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 522         return NULL;
 523 }
 524
 525 /*
 526  * This function creates an entry in Tx BA stream table for the
 527  * given RA/TID pair.
 528  */
 529 void mwifiex_create_ba_tbl(struct mwifiex_private *priv, u8 *ra, int tid,
 530                            enum mwifiex_ba_status ba_status)
 531 {
 532         struct mwifiex_tx_ba_stream_tbl *new_node;
 533         struct mwifiex_ra_list_tbl *ra_list;
 534         unsigned long flags;
 535         int tid_down;
 536
 537         if (!mwifiex_get_ba_tbl(priv, tid, ra)) {
 538                 new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
 539                                    GFP_ATOMIC);
 540                 if (!new_node)
 541                         return;
 542
 543                 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
 544                 ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, ra);
 545                 if (ra_list) {
 546                         ra_list->ba_status = ba_status;
 547                         ra_list->amsdu_in_ampdu = false;
 548                 }
 549                 INIT_LIST_HEAD(&new_node->list);
 550
 551                 new_node->tid = tid;
 552                 new_node->ba_status = ba_status;
 553                 memcpy(new_node->ra, ra, ETH_ALEN);
 554
 555                 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 556                 list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
 557                 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 558         }
 559 }
 560
 561 /*
 562  * This function sends an add BA request to the given TID/RA pair.
 563  */
 564 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
 565 {
 566         struct host_cmd_ds_11n_addba_req add_ba_req;
 567         u32 tx_win_size = priv->add_ba_param.tx_win_size;
 568         static u8 dialog_tok;
 569         int ret;
 570         unsigned long flags;
 571         u16 block_ack_param_set;
 572
 573         mwifiex_dbg(priv->adapter, CMD, "cmd: %s: tid %d\n", __func__, tid);
 574
 575         if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
 576             ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
 577             priv->adapter->is_hw_11ac_capable &&
 578             memcmp(priv->cfg_bssid, peer_mac, ETH_ALEN)) {
 579                 struct mwifiex_sta_node *sta_ptr;
 580
 581                 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
 582                 sta_ptr = mwifiex_get_sta_entry(priv, peer_mac);
 583                 if (!sta_ptr) {
 584                         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 585                         mwifiex_dbg(priv->adapter, ERROR,
 586                                     "BA setup with unknown TDLS peer %pM!\n",
 587                                     peer_mac);
 588                         return -1;
 589                 }
 590                 if (sta_ptr->is_11ac_enabled)
 591                         tx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_TXWINSIZE;
 592                 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
 593         }
 594
 595         block_ack_param_set = (u16)((tid << BLOCKACKPARAM_TID_POS) |
 596                                     tx_win_size << BLOCKACKPARAM_WINSIZE_POS |
 597                                     IMMEDIATE_BLOCK_ACK);
 598
 599         /* enable AMSDU inside AMPDU */
 600         if (priv->add_ba_param.tx_amsdu &&
 601             (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
 602                 block_ack_param_set |= BLOCKACKPARAM_AMSDU_SUPP_MASK;
 603
 604         add_ba_req.block_ack_param_set = cpu_to_le16(block_ack_param_set);
 605         add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
 606
 607         ++dialog_tok;
 608
 609         if (dialog_tok == 0)
 610                 dialog_tok = 1;
 611
 612         add_ba_req.dialog_token = dialog_tok;
 613         memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
 614
 615         /* We don't wait for the response of this command */
 616         ret = mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_REQ,
 617                                0, 0, &add_ba_req, false);
 618
 619         return ret;
 620 }
 621
 622 /*
 623  * This function sends a delete BA request to the given TID/RA pair.
 624  */
 625 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
 626                        int initiator)
 627 {
 628         struct host_cmd_ds_11n_delba delba;
 629         int ret;
 630         uint16_t del_ba_param_set;
 631
 632         memset(&delba, 0, sizeof(delba));
 633         delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
 634
 635         del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
 636         if (initiator)
 637                 del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 638         else
 639                 del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 640
 641         memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
 642
 643         /* We don't wait for the response of this command */
 644         ret = mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA,
 645                                HostCmd_ACT_GEN_SET, 0, &delba, false);
 646
 647         return ret;
 648 }
 649
 650 /*
 651  * This function sends delba to specific tid
 652  */
 653 void mwifiex_11n_delba(struct mwifiex_private *priv, int tid)
 654 {
 655         struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
 656
 657         if (list_empty(&priv->rx_reorder_tbl_ptr)) {
 658                 dev_dbg(priv->adapter->dev,
 659                         "mwifiex_11n_delba: rx_reorder_tbl_ptr empty\n");
 660                 return;
 661         }
 662
 663         list_for_each_entry(rx_reor_tbl_ptr, &priv->rx_reorder_tbl_ptr, list) {
 664                 if (rx_reor_tbl_ptr->tid == tid) {
 665                         dev_dbg(priv->adapter->dev,
 666                                 "Send delba to tid=%d, %pM\n",
 667                                 tid, rx_reor_tbl_ptr->ta);
 668                         mwifiex_send_delba(priv, tid, rx_reor_tbl_ptr->ta, 0);
 669                         return;
 670                 }
 671         }
 672 }
 673
 674 /*
 675  * This function handles the command response of a delete BA request.
 676  */
 677 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
 678 {
 679         struct host_cmd_ds_11n_delba *cmd_del_ba =
 680                 (struct host_cmd_ds_11n_delba *) del_ba;
 681         uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
 682         int tid;
 683
 684         tid = del_ba_param_set >> DELBA_TID_POS;
 685
 686         mwifiex_del_ba_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
 687                            TYPE_DELBA_RECEIVE, INITIATOR_BIT(del_ba_param_set));
 688 }
 689
 690 /*
 691  * This function retrieves the Rx reordering table.
 692  */
 693 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
 694                                struct mwifiex_ds_rx_reorder_tbl *buf)
 695 {
 696         int i;
 697         struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
 698         struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
 699         int count = 0;
 700         unsigned long flags;
 701
 702         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 703         list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
 704                             list) {
 705                 rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
 706                 memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
 707                 rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
 708                 rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
 709                 for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
 710                         if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
 711                                 rx_reo_tbl->buffer[i] = true;
 712                         else
 713                                 rx_reo_tbl->buffer[i] = false;
 714                 }
 715                 rx_reo_tbl++;
 716                 count++;
 717
 718                 if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
 719                         break;
 720         }
 721         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 722
 723         return count;
 724 }
 725
 726 /*
 727  * This function retrieves the Tx BA stream table.
 728  */
 729 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
 730                                  struct mwifiex_ds_tx_ba_stream_tbl *buf)
 731 {
 732         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 733         struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
 734         int count = 0;
 735         unsigned long flags;
 736
 737         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 738         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 739                 rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
 740                 mwifiex_dbg(priv->adapter, DATA, "data: %s tid=%d\n",
 741                             __func__, rx_reo_tbl->tid);
 742                 memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
 743                 rx_reo_tbl->amsdu = tx_ba_tsr_tbl->amsdu;
 744                 rx_reo_tbl++;
 745                 count++;
 746                 if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
 747                         break;
 748         }
 749         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 750
 751         return count;
 752 }
 753
 754 /*
 755  * This function retrieves the entry for specific tx BA stream table by RA and
 756  * deletes it.
 757  */
 758 void mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private *priv, u8 *ra)
 759 {
 760         struct mwifiex_tx_ba_stream_tbl *tbl, *tmp;
 761         unsigned long flags;
 762
 763         if (!ra)
 764                 return;
 765
 766         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 767         list_for_each_entry_safe(tbl, tmp, &priv->tx_ba_stream_tbl_ptr, list) {
 768                 if (!memcmp(tbl->ra, ra, ETH_ALEN)) {
 769                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 770                                                flags);
 771                         mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, tbl);
 772                         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 773                 }
 774         }
 775         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 776
 777         return;
 778 }
 779
 780 /* This function initializes the BlockACK setup information for given
 781  * mwifiex_private structure.
 782  */
 783 void mwifiex_set_ba_params(struct mwifiex_private *priv)
 784 {
 785         priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
 786
 787         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
 788                 priv->add_ba_param.tx_win_size =
 789                                                 MWIFIEX_UAP_AMPDU_DEF_TXWINSIZE;
 790                 priv->add_ba_param.rx_win_size =
 791                                                 MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE;
 792         } else {
 793                 priv->add_ba_param.tx_win_size =
 794                                                 MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
 795                 priv->add_ba_param.rx_win_size =
 796                                                 MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
 797         }
 798
 799         priv->add_ba_param.tx_amsdu = true;
 800         priv->add_ba_param.rx_amsdu = true;
 801
 802         return;
 803 }
 804
 805 u8 mwifiex_get_sec_chan_offset(int chan)
 806 {
 807         u8 sec_offset;
 808
 809         switch (chan) {
 810         case 36:
 811         case 44:
 812         case 52:
 813         case 60:
 814         case 100:
 815         case 108:
 816         case 116:
 817         case 124:
 818         case 132:
 819         case 140:
 820         case 149:
 821         case 157:
 822                 sec_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 823                 break;
 824         case 40:
 825         case 48:
 826         case 56:
 827         case 64:
 828         case 104:
 829         case 112:
 830         case 120:
 831         case 128:
 832         case 136:
 833         case 144:
 834         case 153:
 835         case 161:
 836                 sec_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 837                 break;
 838         case 165:
 839         default:
 840                 sec_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 841                 break;
 842         }
 843
 844         return sec_offset;
 845 }
 846
 847 /* This function will send DELBA to entries in the priv's
 848  * Tx BA stream table
 849  */
 850 static void
 851 mwifiex_send_delba_txbastream_tbl(struct mwifiex_private *priv, u8 tid)
 852 {
 853         struct mwifiex_adapter *adapter = priv->adapter;
 854         struct mwifiex_tx_ba_stream_tbl *tx_ba_stream_tbl_ptr;
 855
 856         if (list_empty(&priv->tx_ba_stream_tbl_ptr))
 857                 return;
 858
 859         list_for_each_entry(tx_ba_stream_tbl_ptr,
 860                             &priv->tx_ba_stream_tbl_ptr, list) {
 861                 if (tx_ba_stream_tbl_ptr->ba_status == BA_SETUP_COMPLETE) {
 862                         if (tid == tx_ba_stream_tbl_ptr->tid) {
 863                                 dev_dbg(adapter->dev,
 864                                         "Tx:Send delba to tid=%d, %pM\n", tid,
 865                                         tx_ba_stream_tbl_ptr->ra);
 866                                 mwifiex_send_delba(priv,
 867                                                    tx_ba_stream_tbl_ptr->tid,
 868                                                    tx_ba_stream_tbl_ptr->ra, 1);
 869                                 return;
 870                         }
 871                 }
 872         }
 873 }
 874
 875 /* This function updates all the tx_win_size
 876  */
 877 void mwifiex_update_ampdu_txwinsize(struct mwifiex_adapter *adapter)
 878 {
 879         u8 i;
 880         u32 tx_win_size;
 881         struct mwifiex_private *priv;
 882
 883         for (i = 0; i < adapter->priv_num; i++) {
 884                 if (!adapter->priv[i])
 885                         continue;
 886                 priv = adapter->priv[i];
 887                 tx_win_size = priv->add_ba_param.tx_win_size;
 888
 889                 if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
 890                         priv->add_ba_param.tx_win_size =
 891                                 MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
 892
 893                 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
 894                         priv->add_ba_param.tx_win_size =
 895                                 MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
 896
 897                 if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
 898                         priv->add_ba_param.tx_win_size =
 899                                 MWIFIEX_UAP_AMPDU_DEF_TXWINSIZE;
 900
 901                 if (adapter->coex_win_size) {
 902                         if (adapter->coex_tx_win_size)
 903                                 priv->add_ba_param.tx_win_size =
 904                                         adapter->coex_tx_win_size;
 905                 }
 906
 907                 if (tx_win_size != priv->add_ba_param.tx_win_size) {
 908                         if (!priv->media_connected)
 909                                 continue;
 910                         for (i = 0; i < MAX_NUM_TID; i++)
 911                                 mwifiex_send_delba_txbastream_tbl(priv, i);
 912                 }
 913         }
 914 }