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

   1 /*
   2  * Marvell Wireless LAN device driver: 802.11n
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * 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 void
  38 mwifiex_fill_cap_info(struct mwifiex_private *priv, u8 radio_type,
  39                       struct mwifiex_ie_types_htcap *ht_cap)
  40 {
  41         uint16_t ht_ext_cap = le16_to_cpu(ht_cap->ht_cap.extended_ht_cap_info);
  42         struct ieee80211_supported_band *sband =
  43                                         priv->wdev->wiphy->bands[radio_type];
  44
  45         ht_cap->ht_cap.ampdu_params_info =
  46                 (sband->ht_cap.ampdu_factor &
  47                  IEEE80211_HT_AMPDU_PARM_FACTOR) |
  48                 ((sband->ht_cap.ampdu_density <<
  49                  IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT) &
  50                  IEEE80211_HT_AMPDU_PARM_DENSITY);
  51
  52         memcpy((u8 *) &ht_cap->ht_cap.mcs, &sband->ht_cap.mcs,
  53                sizeof(sband->ht_cap.mcs));
  54
  55         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
  56             (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
  57              (priv->adapter->sec_chan_offset !=
  58                                         IEEE80211_HT_PARAM_CHA_SEC_NONE)))
  59                 /* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
  60                 SETHT_MCS32(ht_cap->ht_cap.mcs.rx_mask);
  61
  62         /* Clear RD responder bit */
  63         ht_ext_cap &= ~IEEE80211_HT_EXT_CAP_RD_RESPONDER;
  64
  65         ht_cap->ht_cap.cap_info = cpu_to_le16(sband->ht_cap.cap);
  66         ht_cap->ht_cap.extended_ht_cap_info = cpu_to_le16(ht_ext_cap);
  67 }
  68
  69 /*
  70  * This function returns the pointer to an entry in BA Stream
  71  * table which matches the requested BA status.
  72  */
  73 static struct mwifiex_tx_ba_stream_tbl *
  74 mwifiex_get_ba_status(struct mwifiex_private *priv,
  75                       enum mwifiex_ba_status ba_status)
  76 {
  77         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
  78         unsigned long flags;
  79
  80         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
  81         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
  82                 if (tx_ba_tsr_tbl->ba_status == ba_status) {
  83                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
  84                                                flags);
  85                         return tx_ba_tsr_tbl;
  86                 }
  87         }
  88         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
  89         return NULL;
  90 }
  91
  92 /*
  93  * This function handles the command response of delete a block
  94  * ack request.
  95  *
  96  * The function checks the response success status and takes action
  97  * accordingly (send an add BA request in case of success, or recreate
  98  * the deleted stream in case of failure, if the add BA was also
  99  * initiated by us).
 100  */
 101 int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
 102                           struct host_cmd_ds_command *resp)
 103 {
 104         int tid;
 105         struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
 106         struct host_cmd_ds_11n_delba *del_ba = &resp->params.del_ba;
 107         uint16_t del_ba_param_set = le16_to_cpu(del_ba->del_ba_param_set);
 108
 109         tid = del_ba_param_set >> DELBA_TID_POS;
 110         if (del_ba->del_result == BA_RESULT_SUCCESS) {
 111                 mwifiex_del_ba_tbl(priv, tid, del_ba->peer_mac_addr,
 112                                    TYPE_DELBA_SENT,
 113                                    INITIATOR_BIT(del_ba_param_set));
 114
 115                 tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
 116                 if (tx_ba_tbl)
 117                         mwifiex_send_addba(priv, tx_ba_tbl->tid,
 118                                            tx_ba_tbl->ra);
 119         } else { /*
 120                   * In case of failure, recreate the deleted stream in case
 121                   * we initiated the ADDBA
 122                   */
 123                 if (!INITIATOR_BIT(del_ba_param_set))
 124                         return 0;
 125
 126                 mwifiex_create_ba_tbl(priv, del_ba->peer_mac_addr, tid,
 127                                       BA_SETUP_INPROGRESS);
 128
 129                 tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
 130
 131                 if (tx_ba_tbl)
 132                         mwifiex_del_ba_tbl(priv, tx_ba_tbl->tid, tx_ba_tbl->ra,
 133                                            TYPE_DELBA_SENT, true);
 134         }
 135
 136         return 0;
 137 }
 138
 139 /*
 140  * This function handles the command response of add a block
 141  * ack request.
 142  *
 143  * Handling includes changing the header fields to CPU formats, checking
 144  * the response success status and taking actions accordingly (delete the
 145  * BA stream table in case of failure).
 146  */
 147 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
 148                               struct host_cmd_ds_command *resp)
 149 {
 150         int tid;
 151         struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
 152         struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
 153
 154         add_ba_rsp->ssn = cpu_to_le16((le16_to_cpu(add_ba_rsp->ssn))
 155                         & SSN_MASK);
 156
 157         tid = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
 158                 & IEEE80211_ADDBA_PARAM_TID_MASK)
 159                 >> BLOCKACKPARAM_TID_POS;
 160         if (le16_to_cpu(add_ba_rsp->status_code) == BA_RESULT_SUCCESS) {
 161                 tx_ba_tbl = mwifiex_get_ba_tbl(priv, tid,
 162                                                 add_ba_rsp->peer_mac_addr);
 163                 if (tx_ba_tbl) {
 164                         dev_dbg(priv->adapter->dev, "info: BA stream complete\n");
 165                         tx_ba_tbl->ba_status = BA_SETUP_COMPLETE;
 166                 } else {
 167                         dev_err(priv->adapter->dev, "BA stream not created\n");
 168                 }
 169         } else {
 170                 mwifiex_del_ba_tbl(priv, tid, add_ba_rsp->peer_mac_addr,
 171                                    TYPE_DELBA_SENT, true);
 172                 if (add_ba_rsp->add_rsp_result != BA_RESULT_TIMEOUT)
 173                         priv->aggr_prio_tbl[tid].ampdu_ap =
 174                                 BA_STREAM_NOT_ALLOWED;
 175         }
 176
 177         return 0;
 178 }
 179
 180 /*
 181  * This function prepares command of reconfigure Tx buffer.
 182  *
 183  * Preparation includes -
 184  *      - Setting command ID, action and proper size
 185  *      - Setting Tx buffer size (for SET only)
 186  *      - Ensuring correct endian-ness
 187  */
 188 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
 189                              struct host_cmd_ds_command *cmd, int cmd_action,
 190                              u16 *buf_size)
 191 {
 192         struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
 193         u16 action = (u16) cmd_action;
 194
 195         cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
 196         cmd->size =
 197                 cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
 198         tx_buf->action = cpu_to_le16(action);
 199         switch (action) {
 200         case HostCmd_ACT_GEN_SET:
 201                 dev_dbg(priv->adapter->dev, "cmd: set tx_buf=%d\n", *buf_size);
 202                 tx_buf->buff_size = cpu_to_le16(*buf_size);
 203                 break;
 204         case HostCmd_ACT_GEN_GET:
 205         default:
 206                 tx_buf->buff_size = 0;
 207                 break;
 208         }
 209         return 0;
 210 }
 211
 212 /*
 213  * This function prepares command of AMSDU aggregation control.
 214  *
 215  * Preparation includes -
 216  *      - Setting command ID, action and proper size
 217  *      - Setting AMSDU control parameters (for SET only)
 218  *      - Ensuring correct endian-ness
 219  */
 220 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
 221                                 int cmd_action,
 222                                 struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
 223 {
 224         struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 225                 &cmd->params.amsdu_aggr_ctrl;
 226         u16 action = (u16) cmd_action;
 227
 228         cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
 229         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
 230                                 + S_DS_GEN);
 231         amsdu_ctrl->action = cpu_to_le16(action);
 232         switch (action) {
 233         case HostCmd_ACT_GEN_SET:
 234                 amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
 235                 amsdu_ctrl->curr_buf_size = 0;
 236                 break;
 237         case HostCmd_ACT_GEN_GET:
 238         default:
 239                 amsdu_ctrl->curr_buf_size = 0;
 240                 break;
 241         }
 242         return 0;
 243 }
 244
 245 /*
 246  * This function prepares 11n configuration command.
 247  *
 248  * Preparation includes -
 249  *      - Setting command ID, action and proper size
 250  *      - Setting HT Tx capability and HT Tx information fields
 251  *      - Ensuring correct endian-ness
 252  */
 253 int mwifiex_cmd_11n_cfg(struct mwifiex_private *priv,
 254                         struct host_cmd_ds_command *cmd, u16 cmd_action,
 255                         struct mwifiex_ds_11n_tx_cfg *txcfg)
 256 {
 257         struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
 258
 259         cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
 260         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
 261         htcfg->action = cpu_to_le16(cmd_action);
 262         htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
 263         htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
 264
 265         if (priv->adapter->is_hw_11ac_capable)
 266                 htcfg->misc_config = cpu_to_le16(txcfg->misc_config);
 267
 268         return 0;
 269 }
 270
 271 /*
 272  * This function appends an 11n TLV to a buffer.
 273  *
 274  * Buffer allocation is responsibility of the calling
 275  * function. No size validation is made here.
 276  *
 277  * The function fills up the following sections, if applicable -
 278  *      - HT capability IE
 279  *      - HT information IE (with channel list)
 280  *      - 20/40 BSS Coexistence IE
 281  *      - HT Extended Capabilities IE
 282  */
 283 int
 284 mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 285                            struct mwifiex_bssdescriptor *bss_desc,
 286                            u8 **buffer)
 287 {
 288         struct mwifiex_ie_types_htcap *ht_cap;
 289         struct mwifiex_ie_types_htinfo *ht_info;
 290         struct mwifiex_ie_types_chan_list_param_set *chan_list;
 291         struct mwifiex_ie_types_2040bssco *bss_co_2040;
 292         struct mwifiex_ie_types_extcap *ext_cap;
 293         int ret_len = 0;
 294         struct ieee80211_supported_band *sband;
 295         u8 radio_type;
 296
 297         if (!buffer || !*buffer)
 298                 return ret_len;
 299
 300         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 301         sband = priv->wdev->wiphy->bands[radio_type];
 302
 303         if (bss_desc->bcn_ht_cap) {
 304                 ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
 305                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 306                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 307                 ht_cap->header.len =
 308                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 309                 memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
 310                        (u8 *) bss_desc->bcn_ht_cap +
 311                        sizeof(struct ieee_types_header),
 312                        le16_to_cpu(ht_cap->header.len));
 313
 314                 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
 315
 316                 *buffer += sizeof(struct mwifiex_ie_types_htcap);
 317                 ret_len += sizeof(struct mwifiex_ie_types_htcap);
 318         }
 319
 320         if (bss_desc->bcn_ht_oper) {
 321                 if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 322                         ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
 323                         memset(ht_info, 0,
 324                                sizeof(struct mwifiex_ie_types_htinfo));
 325                         ht_info->header.type =
 326                                         cpu_to_le16(WLAN_EID_HT_OPERATION);
 327                         ht_info->header.len =
 328                                 cpu_to_le16(
 329                                         sizeof(struct ieee80211_ht_operation));
 330
 331                         memcpy((u8 *) ht_info +
 332                                sizeof(struct mwifiex_ie_types_header),
 333                                (u8 *) bss_desc->bcn_ht_oper +
 334                                sizeof(struct ieee_types_header),
 335                                le16_to_cpu(ht_info->header.len));
 336
 337                         if (!(sband->ht_cap.cap &
 338                                         IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 339                                 ht_info->ht_oper.ht_param &=
 340                                         ~(IEEE80211_HT_PARAM_CHAN_WIDTH_ANY |
 341                                         IEEE80211_HT_PARAM_CHA_SEC_OFFSET);
 342
 343                         *buffer += sizeof(struct mwifiex_ie_types_htinfo);
 344                         ret_len += sizeof(struct mwifiex_ie_types_htinfo);
 345                 }
 346
 347                 chan_list =
 348                         (struct mwifiex_ie_types_chan_list_param_set *) *buffer;
 349                 memset(chan_list, 0,
 350                        sizeof(struct mwifiex_ie_types_chan_list_param_set));
 351                 chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 352                 chan_list->header.len = cpu_to_le16(
 353                         sizeof(struct mwifiex_ie_types_chan_list_param_set) -
 354                         sizeof(struct mwifiex_ie_types_header));
 355                 chan_list->chan_scan_param[0].chan_number =
 356                         bss_desc->bcn_ht_oper->primary_chan;
 357                 chan_list->chan_scan_param[0].radio_type =
 358                         mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 359
 360                 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
 361                     bss_desc->bcn_ht_oper->ht_param &
 362                     IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)
 363                         SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
 364                                           radio_type,
 365                                           (bss_desc->bcn_ht_oper->ht_param &
 366                                           IEEE80211_HT_PARAM_CHA_SEC_OFFSET));
 367
 368                 *buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 369                 ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 370         }
 371
 372         if (bss_desc->bcn_bss_co_2040) {
 373                 bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
 374                 memset(bss_co_2040, 0,
 375                        sizeof(struct mwifiex_ie_types_2040bssco));
 376                 bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
 377                 bss_co_2040->header.len =
 378                        cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));
 379
 380                 memcpy((u8 *) bss_co_2040 +
 381                        sizeof(struct mwifiex_ie_types_header),
 382                        bss_desc->bcn_bss_co_2040 +
 383                        sizeof(struct ieee_types_header),
 384                        le16_to_cpu(bss_co_2040->header.len));
 385
 386                 *buffer += sizeof(struct mwifiex_ie_types_2040bssco);
 387                 ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
 388         }
 389
 390         if (bss_desc->bcn_ext_cap) {
 391                 ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
 392                 memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
 393                 ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
 394                 ext_cap->header.len = cpu_to_le16(sizeof(ext_cap->ext_cap));
 395
 396                 memcpy((u8 *)ext_cap + sizeof(struct mwifiex_ie_types_header),
 397                        bss_desc->bcn_ext_cap + sizeof(struct ieee_types_header),
 398                        le16_to_cpu(ext_cap->header.len));
 399
 400                 *buffer += sizeof(struct mwifiex_ie_types_extcap);
 401                 ret_len += sizeof(struct mwifiex_ie_types_extcap);
 402         }
 403
 404         return ret_len;
 405 }
 406
 407 /*
 408  * This function checks if the given pointer is valid entry of
 409  * Tx BA Stream table.
 410  */
 411 static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
 412                                 struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
 413 {
 414         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 415
 416         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 417                 if (tx_ba_tsr_tbl == tx_tbl_ptr)
 418                         return true;
 419         }
 420
 421         return false;
 422 }
 423
 424 /*
 425  * This function deletes the given entry in Tx BA Stream table.
 426  *
 427  * The function also performs a validity check on the supplied
 428  * pointer before trying to delete.
 429  */
 430 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
 431                                 struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
 432 {
 433         if (!tx_ba_tsr_tbl &&
 434             mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
 435                 return;
 436
 437         dev_dbg(priv->adapter->dev, "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
 438
 439         list_del(&tx_ba_tsr_tbl->list);
 440
 441         kfree(tx_ba_tsr_tbl);
 442 }
 443
 444 /*
 445  * This function deletes all the entries in Tx BA Stream table.
 446  */
 447 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
 448 {
 449         int i;
 450         struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
 451         unsigned long flags;
 452
 453         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 454         list_for_each_entry_safe(del_tbl_ptr, tmp_node,
 455                                  &priv->tx_ba_stream_tbl_ptr, list)
 456                 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
 457         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 458
 459         INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 460
 461         for (i = 0; i < MAX_NUM_TID; ++i)
 462                 priv->aggr_prio_tbl[i].ampdu_ap =
 463                         priv->aggr_prio_tbl[i].ampdu_user;
 464 }
 465
 466 /*
 467  * This function returns the pointer to an entry in BA Stream
 468  * table which matches the given RA/TID pair.
 469  */
 470 struct mwifiex_tx_ba_stream_tbl *
 471 mwifiex_get_ba_tbl(struct mwifiex_private *priv, int tid, u8 *ra)
 472 {
 473         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 474         unsigned long flags;
 475
 476         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 477         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 478                 if (!memcmp(tx_ba_tsr_tbl->ra, ra, ETH_ALEN) &&
 479                     tx_ba_tsr_tbl->tid == tid) {
 480                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 481                                                flags);
 482                         return tx_ba_tsr_tbl;
 483                 }
 484         }
 485         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 486         return NULL;
 487 }
 488
 489 /*
 490  * This function creates an entry in Tx BA stream table for the
 491  * given RA/TID pair.
 492  */
 493 void mwifiex_create_ba_tbl(struct mwifiex_private *priv, u8 *ra, int tid,
 494                            enum mwifiex_ba_status ba_status)
 495 {
 496         struct mwifiex_tx_ba_stream_tbl *new_node;
 497         unsigned long flags;
 498
 499         if (!mwifiex_get_ba_tbl(priv, tid, ra)) {
 500                 new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
 501                                    GFP_ATOMIC);
 502                 if (!new_node)
 503                         return;
 504
 505                 INIT_LIST_HEAD(&new_node->list);
 506
 507                 new_node->tid = tid;
 508                 new_node->ba_status = ba_status;
 509                 memcpy(new_node->ra, ra, ETH_ALEN);
 510
 511                 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 512                 list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
 513                 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 514         }
 515 }
 516
 517 /*
 518  * This function sends an add BA request to the given TID/RA pair.
 519  */
 520 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
 521 {
 522         struct host_cmd_ds_11n_addba_req add_ba_req;
 523         static u8 dialog_tok;
 524         int ret;
 525
 526         dev_dbg(priv->adapter->dev, "cmd: %s: tid %d\n", __func__, tid);
 527
 528         add_ba_req.block_ack_param_set = cpu_to_le16(
 529                 (u16) ((tid << BLOCKACKPARAM_TID_POS) |
 530                          (priv->add_ba_param.
 531                           tx_win_size << BLOCKACKPARAM_WINSIZE_POS) |
 532                          IMMEDIATE_BLOCK_ACK));
 533         add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
 534
 535         ++dialog_tok;
 536
 537         if (dialog_tok == 0)
 538                 dialog_tok = 1;
 539
 540         add_ba_req.dialog_token = dialog_tok;
 541         memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
 542
 543         /* We don't wait for the response of this command */
 544         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_REQ,
 545                                      0, 0, &add_ba_req);
 546
 547         return ret;
 548 }
 549
 550 /*
 551  * This function sends a delete BA request to the given TID/RA pair.
 552  */
 553 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
 554                        int initiator)
 555 {
 556         struct host_cmd_ds_11n_delba delba;
 557         int ret;
 558         uint16_t del_ba_param_set;
 559
 560         memset(&delba, 0, sizeof(delba));
 561         delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
 562
 563         del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
 564         if (initiator)
 565                 del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 566         else
 567                 del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 568
 569         memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
 570
 571         /* We don't wait for the response of this command */
 572         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_DELBA,
 573                                      HostCmd_ACT_GEN_SET, 0, &delba);
 574
 575         return ret;
 576 }
 577
 578 /*
 579  * This function handles the command response of a delete BA request.
 580  */
 581 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
 582 {
 583         struct host_cmd_ds_11n_delba *cmd_del_ba =
 584                 (struct host_cmd_ds_11n_delba *) del_ba;
 585         uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
 586         int tid;
 587
 588         tid = del_ba_param_set >> DELBA_TID_POS;
 589
 590         mwifiex_del_ba_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
 591                            TYPE_DELBA_RECEIVE, INITIATOR_BIT(del_ba_param_set));
 592 }
 593
 594 /*
 595  * This function retrieves the Rx reordering table.
 596  */
 597 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
 598                                struct mwifiex_ds_rx_reorder_tbl *buf)
 599 {
 600         int i;
 601         struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
 602         struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
 603         int count = 0;
 604         unsigned long flags;
 605
 606         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 607         list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
 608                             list) {
 609                 rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
 610                 memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
 611                 rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
 612                 rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
 613                 for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
 614                         if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
 615                                 rx_reo_tbl->buffer[i] = true;
 616                         else
 617                                 rx_reo_tbl->buffer[i] = false;
 618                 }
 619                 rx_reo_tbl++;
 620                 count++;
 621
 622                 if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
 623                         break;
 624         }
 625         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 626
 627         return count;
 628 }
 629
 630 /*
 631  * This function retrieves the Tx BA stream table.
 632  */
 633 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
 634                                  struct mwifiex_ds_tx_ba_stream_tbl *buf)
 635 {
 636         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 637         struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
 638         int count = 0;
 639         unsigned long flags;
 640
 641         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 642         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 643                 rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
 644                 dev_dbg(priv->adapter->dev, "data: %s tid=%d\n",
 645                         __func__, rx_reo_tbl->tid);
 646                 memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
 647                 rx_reo_tbl++;
 648                 count++;
 649                 if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
 650                         break;
 651         }
 652         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 653
 654         return count;
 655 }
 656
 657 /*
 658  * This function retrieves the entry for specific tx BA stream table by RA and
 659  * deletes it.
 660  */
 661 void mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private *priv, u8 *ra)
 662 {
 663         struct mwifiex_tx_ba_stream_tbl *tbl, *tmp;
 664         unsigned long flags;
 665
 666         if (!ra)
 667                 return;
 668
 669         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 670         list_for_each_entry_safe(tbl, tmp, &priv->tx_ba_stream_tbl_ptr, list) {
 671                 if (!memcmp(tbl->ra, ra, ETH_ALEN)) {
 672                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 673                                                flags);
 674                         mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, tbl);
 675                         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 676                 }
 677         }
 678         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 679
 680         return;
 681 }