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                 /* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
  58                 SETHT_MCS32(ht_cap->ht_cap.mcs.rx_mask);
  59
  60         /* Clear RD responder bit */
  61         ht_ext_cap &= ~IEEE80211_HT_EXT_CAP_RD_RESPONDER;
  62
  63         ht_cap->ht_cap.cap_info = cpu_to_le16(sband->ht_cap.cap);
  64         ht_cap->ht_cap.extended_ht_cap_info = cpu_to_le16(ht_ext_cap);
  65 }
  66
  67 /*
  68  * This function returns the pointer to an entry in BA Stream
  69  * table which matches the requested BA status.
  70  */
  71 static struct mwifiex_tx_ba_stream_tbl *
  72 mwifiex_get_ba_status(struct mwifiex_private *priv,
  73                       enum mwifiex_ba_status ba_status)
  74 {
  75         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
  76         unsigned long flags;
  77
  78         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
  79         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
  80                 if (tx_ba_tsr_tbl->ba_status == ba_status) {
  81                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
  82                                                flags);
  83                         return tx_ba_tsr_tbl;
  84                 }
  85         }
  86         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
  87         return NULL;
  88 }
  89
  90 /*
  91  * This function handles the command response of delete a block
  92  * ack request.
  93  *
  94  * The function checks the response success status and takes action
  95  * accordingly (send an add BA request in case of success, or recreate
  96  * the deleted stream in case of failure, if the add BA was also
  97  * initiated by us).
  98  */
  99 int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
 100                           struct host_cmd_ds_command *resp)
 101 {
 102         int tid;
 103         struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
 104         struct host_cmd_ds_11n_delba *del_ba = &resp->params.del_ba;
 105         uint16_t del_ba_param_set = le16_to_cpu(del_ba->del_ba_param_set);
 106
 107         tid = del_ba_param_set >> DELBA_TID_POS;
 108         if (del_ba->del_result == BA_RESULT_SUCCESS) {
 109                 mwifiex_del_ba_tbl(priv, tid, del_ba->peer_mac_addr,
 110                                    TYPE_DELBA_SENT,
 111                                    INITIATOR_BIT(del_ba_param_set));
 112
 113                 tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
 114                 if (tx_ba_tbl)
 115                         mwifiex_send_addba(priv, tx_ba_tbl->tid,
 116                                            tx_ba_tbl->ra);
 117         } else { /*
 118                   * In case of failure, recreate the deleted stream in case
 119                   * we initiated the ADDBA
 120                   */
 121                 if (!INITIATOR_BIT(del_ba_param_set))
 122                         return 0;
 123
 124                 mwifiex_create_ba_tbl(priv, del_ba->peer_mac_addr, tid,
 125                                       BA_SETUP_INPROGRESS);
 126
 127                 tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
 128
 129                 if (tx_ba_tbl)
 130                         mwifiex_del_ba_tbl(priv, tx_ba_tbl->tid, tx_ba_tbl->ra,
 131                                            TYPE_DELBA_SENT, true);
 132         }
 133
 134         return 0;
 135 }
 136
 137 /*
 138  * This function handles the command response of add a block
 139  * ack request.
 140  *
 141  * Handling includes changing the header fields to CPU formats, checking
 142  * the response success status and taking actions accordingly (delete the
 143  * BA stream table in case of failure).
 144  */
 145 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
 146                               struct host_cmd_ds_command *resp)
 147 {
 148         int tid;
 149         struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
 150         struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
 151
 152         add_ba_rsp->ssn = cpu_to_le16((le16_to_cpu(add_ba_rsp->ssn))
 153                         & SSN_MASK);
 154
 155         tid = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
 156                 & IEEE80211_ADDBA_PARAM_TID_MASK)
 157                 >> BLOCKACKPARAM_TID_POS;
 158         if (le16_to_cpu(add_ba_rsp->status_code) == BA_RESULT_SUCCESS) {
 159                 tx_ba_tbl = mwifiex_get_ba_tbl(priv, tid,
 160                                                 add_ba_rsp->peer_mac_addr);
 161                 if (tx_ba_tbl) {
 162                         dev_dbg(priv->adapter->dev, "info: BA stream complete\n");
 163                         tx_ba_tbl->ba_status = BA_SETUP_COMPLETE;
 164                 } else {
 165                         dev_err(priv->adapter->dev, "BA stream not created\n");
 166                 }
 167         } else {
 168                 mwifiex_del_ba_tbl(priv, tid, add_ba_rsp->peer_mac_addr,
 169                                    TYPE_DELBA_SENT, true);
 170                 if (add_ba_rsp->add_rsp_result != BA_RESULT_TIMEOUT)
 171                         priv->aggr_prio_tbl[tid].ampdu_ap =
 172                                 BA_STREAM_NOT_ALLOWED;
 173         }
 174
 175         return 0;
 176 }
 177
 178 /*
 179  * This function prepares command of reconfigure Tx buffer.
 180  *
 181  * Preparation includes -
 182  *      - Setting command ID, action and proper size
 183  *      - Setting Tx buffer size (for SET only)
 184  *      - Ensuring correct endian-ness
 185  */
 186 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
 187                              struct host_cmd_ds_command *cmd, int cmd_action,
 188                              u16 *buf_size)
 189 {
 190         struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
 191         u16 action = (u16) cmd_action;
 192
 193         cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
 194         cmd->size =
 195                 cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
 196         tx_buf->action = cpu_to_le16(action);
 197         switch (action) {
 198         case HostCmd_ACT_GEN_SET:
 199                 dev_dbg(priv->adapter->dev, "cmd: set tx_buf=%d\n", *buf_size);
 200                 tx_buf->buff_size = cpu_to_le16(*buf_size);
 201                 break;
 202         case HostCmd_ACT_GEN_GET:
 203         default:
 204                 tx_buf->buff_size = 0;
 205                 break;
 206         }
 207         return 0;
 208 }
 209
 210 /*
 211  * This function prepares command of AMSDU aggregation control.
 212  *
 213  * Preparation includes -
 214  *      - Setting command ID, action and proper size
 215  *      - Setting AMSDU control parameters (for SET only)
 216  *      - Ensuring correct endian-ness
 217  */
 218 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
 219                                 int cmd_action,
 220                                 struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
 221 {
 222         struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 223                 &cmd->params.amsdu_aggr_ctrl;
 224         u16 action = (u16) cmd_action;
 225
 226         cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
 227         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
 228                                 + S_DS_GEN);
 229         amsdu_ctrl->action = cpu_to_le16(action);
 230         switch (action) {
 231         case HostCmd_ACT_GEN_SET:
 232                 amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
 233                 amsdu_ctrl->curr_buf_size = 0;
 234                 break;
 235         case HostCmd_ACT_GEN_GET:
 236         default:
 237                 amsdu_ctrl->curr_buf_size = 0;
 238                 break;
 239         }
 240         return 0;
 241 }
 242
 243 /*
 244  * This function prepares 11n configuration command.
 245  *
 246  * Preparation includes -
 247  *      - Setting command ID, action and proper size
 248  *      - Setting HT Tx capability and HT Tx information fields
 249  *      - Ensuring correct endian-ness
 250  */
 251 int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd, u16 cmd_action,
 252                         struct mwifiex_ds_11n_tx_cfg *txcfg)
 253 {
 254         struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
 255
 256         cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
 257         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
 258         htcfg->action = cpu_to_le16(cmd_action);
 259         htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
 260         htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
 261         return 0;
 262 }
 263
 264 /*
 265  * This function appends an 11n TLV to a buffer.
 266  *
 267  * Buffer allocation is responsibility of the calling
 268  * function. No size validation is made here.
 269  *
 270  * The function fills up the following sections, if applicable -
 271  *      - HT capability IE
 272  *      - HT information IE (with channel list)
 273  *      - 20/40 BSS Coexistence IE
 274  *      - HT Extended Capabilities IE
 275  */
 276 int
 277 mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 278                            struct mwifiex_bssdescriptor *bss_desc,
 279                            u8 **buffer)
 280 {
 281         struct mwifiex_ie_types_htcap *ht_cap;
 282         struct mwifiex_ie_types_htinfo *ht_info;
 283         struct mwifiex_ie_types_chan_list_param_set *chan_list;
 284         struct mwifiex_ie_types_2040bssco *bss_co_2040;
 285         struct mwifiex_ie_types_extcap *ext_cap;
 286         int ret_len = 0;
 287         struct ieee80211_supported_band *sband;
 288         u8 radio_type;
 289
 290         if (!buffer || !*buffer)
 291                 return ret_len;
 292
 293         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 294         sband = priv->wdev->wiphy->bands[radio_type];
 295
 296         if (bss_desc->bcn_ht_cap) {
 297                 ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
 298                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 299                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 300                 ht_cap->header.len =
 301                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 302                 memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
 303                        (u8 *) bss_desc->bcn_ht_cap +
 304                        sizeof(struct ieee_types_header),
 305                        le16_to_cpu(ht_cap->header.len));
 306
 307                 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
 308
 309                 *buffer += sizeof(struct mwifiex_ie_types_htcap);
 310                 ret_len += sizeof(struct mwifiex_ie_types_htcap);
 311         }
 312
 313         if (bss_desc->bcn_ht_oper) {
 314                 if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 315                         ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
 316                         memset(ht_info, 0,
 317                                sizeof(struct mwifiex_ie_types_htinfo));
 318                         ht_info->header.type =
 319                                         cpu_to_le16(WLAN_EID_HT_OPERATION);
 320                         ht_info->header.len =
 321                                 cpu_to_le16(
 322                                         sizeof(struct ieee80211_ht_operation));
 323
 324                         memcpy((u8 *) ht_info +
 325                                sizeof(struct mwifiex_ie_types_header),
 326                                (u8 *) bss_desc->bcn_ht_oper +
 327                                sizeof(struct ieee_types_header),
 328                                le16_to_cpu(ht_info->header.len));
 329
 330                         if (!(sband->ht_cap.cap &
 331                                         IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 332                                 ht_info->ht_oper.ht_param &=
 333                                         ~(IEEE80211_HT_PARAM_CHAN_WIDTH_ANY |
 334                                         IEEE80211_HT_PARAM_CHA_SEC_OFFSET);
 335
 336                         *buffer += sizeof(struct mwifiex_ie_types_htinfo);
 337                         ret_len += sizeof(struct mwifiex_ie_types_htinfo);
 338                 }
 339
 340                 chan_list =
 341                         (struct mwifiex_ie_types_chan_list_param_set *) *buffer;
 342                 memset(chan_list, 0,
 343                        sizeof(struct mwifiex_ie_types_chan_list_param_set));
 344                 chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 345                 chan_list->header.len = cpu_to_le16(
 346                         sizeof(struct mwifiex_ie_types_chan_list_param_set) -
 347                         sizeof(struct mwifiex_ie_types_header));
 348                 chan_list->chan_scan_param[0].chan_number =
 349                         bss_desc->bcn_ht_oper->primary_chan;
 350                 chan_list->chan_scan_param[0].radio_type =
 351                         mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 352
 353                 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
 354                     bss_desc->bcn_ht_oper->ht_param &
 355                     IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)
 356                         SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
 357                                           radio_type,
 358                                           (bss_desc->bcn_ht_oper->ht_param &
 359                                           IEEE80211_HT_PARAM_CHA_SEC_OFFSET));
 360
 361                 *buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 362                 ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 363         }
 364
 365         if (bss_desc->bcn_bss_co_2040) {
 366                 bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
 367                 memset(bss_co_2040, 0,
 368                        sizeof(struct mwifiex_ie_types_2040bssco));
 369                 bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
 370                 bss_co_2040->header.len =
 371                        cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));
 372
 373                 memcpy((u8 *) bss_co_2040 +
 374                        sizeof(struct mwifiex_ie_types_header),
 375                        bss_desc->bcn_bss_co_2040 +
 376                        sizeof(struct ieee_types_header),
 377                        le16_to_cpu(bss_co_2040->header.len));
 378
 379                 *buffer += sizeof(struct mwifiex_ie_types_2040bssco);
 380                 ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
 381         }
 382
 383         if (bss_desc->bcn_ext_cap) {
 384                 ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
 385                 memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
 386                 ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
 387                 ext_cap->header.len = cpu_to_le16(sizeof(ext_cap->ext_cap));
 388
 389                 memcpy((u8 *)ext_cap + sizeof(struct mwifiex_ie_types_header),
 390                        bss_desc->bcn_ext_cap + sizeof(struct ieee_types_header),
 391                        le16_to_cpu(ext_cap->header.len));
 392
 393                 *buffer += sizeof(struct mwifiex_ie_types_extcap);
 394                 ret_len += sizeof(struct mwifiex_ie_types_extcap);
 395         }
 396
 397         return ret_len;
 398 }
 399
 400 /*
 401  * This function reconfigures the Tx buffer size in firmware.
 402  *
 403  * This function prepares a firmware command and issues it, if
 404  * the current Tx buffer size is different from the one requested.
 405  * Maximum configurable Tx buffer size is limited by the HT capability
 406  * field value.
 407  */
 408 void
 409 mwifiex_cfg_tx_buf(struct mwifiex_private *priv,
 410                    struct mwifiex_bssdescriptor *bss_desc)
 411 {
 412         u16 max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 413         u16 tx_buf, curr_tx_buf_size = 0;
 414
 415         if (bss_desc->bcn_ht_cap) {
 416                 if (le16_to_cpu(bss_desc->bcn_ht_cap->cap_info) &
 417                                 IEEE80211_HT_CAP_MAX_AMSDU)
 418                         max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_8K;
 419                 else
 420                         max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 421         }
 422
 423         tx_buf = min(priv->adapter->max_tx_buf_size, max_amsdu);
 424
 425         dev_dbg(priv->adapter->dev, "info: max_amsdu=%d, max_tx_buf=%d\n",
 426                 max_amsdu, priv->adapter->max_tx_buf_size);
 427
 428         if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_2K)
 429                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 430         else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_4K)
 431                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 432         else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_8K)
 433                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_8K;
 434         if (curr_tx_buf_size != tx_buf)
 435                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
 436                                        HostCmd_ACT_GEN_SET, 0, &tx_buf);
 437 }
 438
 439 /*
 440  * This function checks if the given pointer is valid entry of
 441  * Tx BA Stream table.
 442  */
 443 static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
 444                                 struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
 445 {
 446         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 447
 448         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 449                 if (tx_ba_tsr_tbl == tx_tbl_ptr)
 450                         return true;
 451         }
 452
 453         return false;
 454 }
 455
 456 /*
 457  * This function deletes the given entry in Tx BA Stream table.
 458  *
 459  * The function also performs a validity check on the supplied
 460  * pointer before trying to delete.
 461  */
 462 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
 463                                 struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
 464 {
 465         if (!tx_ba_tsr_tbl &&
 466             mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
 467                 return;
 468
 469         dev_dbg(priv->adapter->dev, "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
 470
 471         list_del(&tx_ba_tsr_tbl->list);
 472
 473         kfree(tx_ba_tsr_tbl);
 474 }
 475
 476 /*
 477  * This function deletes all the entries in Tx BA Stream table.
 478  */
 479 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
 480 {
 481         int i;
 482         struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
 483         unsigned long flags;
 484
 485         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 486         list_for_each_entry_safe(del_tbl_ptr, tmp_node,
 487                                  &priv->tx_ba_stream_tbl_ptr, list)
 488                 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
 489         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 490
 491         INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 492
 493         for (i = 0; i < MAX_NUM_TID; ++i)
 494                 priv->aggr_prio_tbl[i].ampdu_ap =
 495                         priv->aggr_prio_tbl[i].ampdu_user;
 496 }
 497
 498 /*
 499  * This function returns the pointer to an entry in BA Stream
 500  * table which matches the given RA/TID pair.
 501  */
 502 struct mwifiex_tx_ba_stream_tbl *
 503 mwifiex_get_ba_tbl(struct mwifiex_private *priv, int tid, u8 *ra)
 504 {
 505         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 506         unsigned long flags;
 507
 508         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 509         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 510                 if (!memcmp(tx_ba_tsr_tbl->ra, ra, ETH_ALEN) &&
 511                     tx_ba_tsr_tbl->tid == tid) {
 512                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 513                                                flags);
 514                         return tx_ba_tsr_tbl;
 515                 }
 516         }
 517         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 518         return NULL;
 519 }
 520
 521 /*
 522  * This function creates an entry in Tx BA stream table for the
 523  * given RA/TID pair.
 524  */
 525 void mwifiex_create_ba_tbl(struct mwifiex_private *priv, u8 *ra, int tid,
 526                            enum mwifiex_ba_status ba_status)
 527 {
 528         struct mwifiex_tx_ba_stream_tbl *new_node;
 529         unsigned long flags;
 530
 531         if (!mwifiex_get_ba_tbl(priv, tid, ra)) {
 532                 new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
 533                                    GFP_ATOMIC);
 534                 if (!new_node) {
 535                         dev_err(priv->adapter->dev,
 536                                 "%s: failed to alloc new_node\n", __func__);
 537                         return;
 538                 }
 539
 540                 INIT_LIST_HEAD(&new_node->list);
 541
 542                 new_node->tid = tid;
 543                 new_node->ba_status = ba_status;
 544                 memcpy(new_node->ra, ra, ETH_ALEN);
 545
 546                 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 547                 list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
 548                 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 549         }
 550 }
 551
 552 /*
 553  * This function sends an add BA request to the given TID/RA pair.
 554  */
 555 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
 556 {
 557         struct host_cmd_ds_11n_addba_req add_ba_req;
 558         static u8 dialog_tok;
 559         int ret;
 560
 561         dev_dbg(priv->adapter->dev, "cmd: %s: tid %d\n", __func__, tid);
 562
 563         add_ba_req.block_ack_param_set = cpu_to_le16(
 564                 (u16) ((tid << BLOCKACKPARAM_TID_POS) |
 565                          (priv->add_ba_param.
 566                           tx_win_size << BLOCKACKPARAM_WINSIZE_POS) |
 567                          IMMEDIATE_BLOCK_ACK));
 568         add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
 569
 570         ++dialog_tok;
 571
 572         if (dialog_tok == 0)
 573                 dialog_tok = 1;
 574
 575         add_ba_req.dialog_token = dialog_tok;
 576         memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
 577
 578         /* We don't wait for the response of this command */
 579         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_REQ,
 580                                      0, 0, &add_ba_req);
 581
 582         return ret;
 583 }
 584
 585 /*
 586  * This function sends a delete BA request to the given TID/RA pair.
 587  */
 588 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
 589                        int initiator)
 590 {
 591         struct host_cmd_ds_11n_delba delba;
 592         int ret;
 593         uint16_t del_ba_param_set;
 594
 595         memset(&delba, 0, sizeof(delba));
 596         delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
 597
 598         del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
 599         if (initiator)
 600                 del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 601         else
 602                 del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 603
 604         memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
 605
 606         /* We don't wait for the response of this command */
 607         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_DELBA,
 608                                      HostCmd_ACT_GEN_SET, 0, &delba);
 609
 610         return ret;
 611 }
 612
 613 /*
 614  * This function handles the command response of a delete BA request.
 615  */
 616 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
 617 {
 618         struct host_cmd_ds_11n_delba *cmd_del_ba =
 619                 (struct host_cmd_ds_11n_delba *) del_ba;
 620         uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
 621         int tid;
 622
 623         tid = del_ba_param_set >> DELBA_TID_POS;
 624
 625         mwifiex_del_ba_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
 626                            TYPE_DELBA_RECEIVE, INITIATOR_BIT(del_ba_param_set));
 627 }
 628
 629 /*
 630  * This function retrieves the Rx reordering table.
 631  */
 632 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
 633                                struct mwifiex_ds_rx_reorder_tbl *buf)
 634 {
 635         int i;
 636         struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
 637         struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
 638         int count = 0;
 639         unsigned long flags;
 640
 641         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 642         list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
 643                             list) {
 644                 rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
 645                 memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
 646                 rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
 647                 rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
 648                 for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
 649                         if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
 650                                 rx_reo_tbl->buffer[i] = true;
 651                         else
 652                                 rx_reo_tbl->buffer[i] = false;
 653                 }
 654                 rx_reo_tbl++;
 655                 count++;
 656
 657                 if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
 658                         break;
 659         }
 660         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 661
 662         return count;
 663 }
 664
 665 /*
 666  * This function retrieves the Tx BA stream table.
 667  */
 668 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
 669                                  struct mwifiex_ds_tx_ba_stream_tbl *buf)
 670 {
 671         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 672         struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
 673         int count = 0;
 674         unsigned long flags;
 675
 676         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 677         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 678                 rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
 679                 dev_dbg(priv->adapter->dev, "data: %s tid=%d\n",
 680                         __func__, rx_reo_tbl->tid);
 681                 memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
 682                 rx_reo_tbl++;
 683                 count++;
 684                 if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
 685                         break;
 686         }
 687         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 688
 689         return count;
 690 }
 691
 692 /*
 693  * This function retrieves the entry for specific tx BA stream table by RA and
 694  * deletes it.
 695  */
 696 void mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private *priv, u8 *ra)
 697 {
 698         struct mwifiex_tx_ba_stream_tbl *tbl, *tmp;
 699         unsigned long flags;
 700
 701         if (!ra)
 702                 return;
 703
 704         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 705         list_for_each_entry_safe(tbl, tmp, &priv->tx_ba_stream_tbl_ptr, list) {
 706                 if (!memcmp(tbl->ra, ra, ETH_ALEN)) {
 707                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 708                                                flags);
 709                         mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, tbl);
 710                         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 711                 }
 712         }
 713         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 714
 715         return;
 716 }