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_11n_get_tx_ba_stream_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 =
 105                 (struct host_cmd_ds_11n_delba *) &resp->params.del_ba;
 106         uint16_t del_ba_param_set = le16_to_cpu(del_ba->del_ba_param_set);
 107
 108         tid = del_ba_param_set >> DELBA_TID_POS;
 109         if (del_ba->del_result == BA_RESULT_SUCCESS) {
 110                 mwifiex_11n_delete_ba_stream_tbl(priv, tid,
 111                                 del_ba->peer_mac_addr, TYPE_DELBA_SENT,
 112                                 INITIATOR_BIT(del_ba_param_set));
 113
 114                 tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_status(priv,
 115                                                 BA_STREAM_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                         mwifiex_11n_create_tx_ba_stream_tbl(priv,
 125                                         del_ba->peer_mac_addr, tid,
 126                                         BA_STREAM_SETUP_INPROGRESS);
 127
 128                         tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_status(priv,
 129                                         BA_STREAM_SETUP_INPROGRESS);
 130                         if (tx_ba_tbl)
 131                                 mwifiex_11n_delete_ba_stream_tbl(priv,
 132                                                 tx_ba_tbl->tid, tx_ba_tbl->ra,
 133                                                 TYPE_DELBA_SENT, true);
 134                 }
 135         }
 136
 137         return 0;
 138 }
 139
 140 /*
 141  * This function handles the command response of add a block
 142  * ack request.
 143  *
 144  * Handling includes changing the header fields to CPU formats, checking
 145  * the response success status and taking actions accordingly (delete the
 146  * BA stream table in case of failure).
 147  */
 148 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
 149                               struct host_cmd_ds_command *resp)
 150 {
 151         int tid;
 152         struct host_cmd_ds_11n_addba_rsp *add_ba_rsp =
 153                 (struct host_cmd_ds_11n_addba_rsp *) &resp->params.add_ba_rsp;
 154         struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
 155
 156         add_ba_rsp->ssn = cpu_to_le16((le16_to_cpu(add_ba_rsp->ssn))
 157                         & SSN_MASK);
 158
 159         tid = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
 160                 & IEEE80211_ADDBA_PARAM_TID_MASK)
 161                 >> BLOCKACKPARAM_TID_POS;
 162         if (le16_to_cpu(add_ba_rsp->status_code) == BA_RESULT_SUCCESS) {
 163                 tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_tbl(priv, tid,
 164                                                 add_ba_rsp->peer_mac_addr);
 165                 if (tx_ba_tbl) {
 166                         dev_dbg(priv->adapter->dev, "info: BA stream complete\n");
 167                         tx_ba_tbl->ba_status = BA_STREAM_SETUP_COMPLETE;
 168                 } else {
 169                         dev_err(priv->adapter->dev, "BA stream not created\n");
 170                 }
 171         } else {
 172                 mwifiex_11n_delete_ba_stream_tbl(priv, tid,
 173                                                 add_ba_rsp->peer_mac_addr,
 174                                                 TYPE_DELBA_SENT, true);
 175                 if (add_ba_rsp->add_rsp_result != BA_RESULT_TIMEOUT)
 176                         priv->aggr_prio_tbl[tid].ampdu_ap =
 177                                 BA_STREAM_NOT_ALLOWED;
 178         }
 179
 180         return 0;
 181 }
 182
 183 /*
 184  * This function handles the command response of 11n configuration request.
 185  *
 186  * Handling includes changing the header fields into CPU format.
 187  */
 188 int mwifiex_ret_11n_cfg(struct host_cmd_ds_command *resp,
 189                         struct mwifiex_ds_11n_tx_cfg *tx_cfg)
 190 {
 191         struct host_cmd_ds_11n_cfg *htcfg = &resp->params.htcfg;
 192
 193         if (tx_cfg) {
 194                 tx_cfg->tx_htcap = le16_to_cpu(htcfg->ht_tx_cap);
 195                 tx_cfg->tx_htinfo = le16_to_cpu(htcfg->ht_tx_info);
 196         }
 197         return 0;
 198 }
 199
 200 /*
 201  * This function prepares command of reconfigure Tx buffer.
 202  *
 203  * Preparation includes -
 204  *      - Setting command ID, action and proper size
 205  *      - Setting Tx buffer size (for SET only)
 206  *      - Ensuring correct endian-ness
 207  */
 208 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
 209                              struct host_cmd_ds_command *cmd, int cmd_action,
 210                              u16 *buf_size)
 211 {
 212         struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
 213         u16 action = (u16) cmd_action;
 214
 215         cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
 216         cmd->size =
 217                 cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
 218         tx_buf->action = cpu_to_le16(action);
 219         switch (action) {
 220         case HostCmd_ACT_GEN_SET:
 221                 dev_dbg(priv->adapter->dev, "cmd: set tx_buf=%d\n", *buf_size);
 222                 tx_buf->buff_size = cpu_to_le16(*buf_size);
 223                 break;
 224         case HostCmd_ACT_GEN_GET:
 225         default:
 226                 tx_buf->buff_size = 0;
 227                 break;
 228         }
 229         return 0;
 230 }
 231
 232 /*
 233  * This function prepares command of AMSDU aggregation control.
 234  *
 235  * Preparation includes -
 236  *      - Setting command ID, action and proper size
 237  *      - Setting AMSDU control parameters (for SET only)
 238  *      - Ensuring correct endian-ness
 239  */
 240 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
 241                                 int cmd_action,
 242                                 struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
 243 {
 244         struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 245                 &cmd->params.amsdu_aggr_ctrl;
 246         u16 action = (u16) cmd_action;
 247
 248         cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
 249         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
 250                                 + S_DS_GEN);
 251         amsdu_ctrl->action = cpu_to_le16(action);
 252         switch (action) {
 253         case HostCmd_ACT_GEN_SET:
 254                 amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
 255                 amsdu_ctrl->curr_buf_size = 0;
 256                 break;
 257         case HostCmd_ACT_GEN_GET:
 258         default:
 259                 amsdu_ctrl->curr_buf_size = 0;
 260                 break;
 261         }
 262         return 0;
 263 }
 264
 265 /*
 266  * This function handles the command response of AMSDU aggregation
 267  * control request.
 268  *
 269  * Handling includes changing the header fields into CPU format.
 270  */
 271 int mwifiex_ret_amsdu_aggr_ctrl(struct host_cmd_ds_command *resp,
 272                                 struct mwifiex_ds_11n_amsdu_aggr_ctrl
 273                                 *amsdu_aggr_ctrl)
 274 {
 275         struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 276                 &resp->params.amsdu_aggr_ctrl;
 277
 278         if (amsdu_aggr_ctrl) {
 279                 amsdu_aggr_ctrl->enable = le16_to_cpu(amsdu_ctrl->enable);
 280                 amsdu_aggr_ctrl->curr_buf_size =
 281                         le16_to_cpu(amsdu_ctrl->curr_buf_size);
 282         }
 283         return 0;
 284 }
 285
 286 /*
 287  * This function prepares 11n configuration command.
 288  *
 289  * Preparation includes -
 290  *      - Setting command ID, action and proper size
 291  *      - Setting HT Tx capability and HT Tx information fields
 292  *      - Ensuring correct endian-ness
 293  */
 294 int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd, u16 cmd_action,
 295                         struct mwifiex_ds_11n_tx_cfg *txcfg)
 296 {
 297         struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
 298
 299         cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
 300         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
 301         htcfg->action = cpu_to_le16(cmd_action);
 302         htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
 303         htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
 304         return 0;
 305 }
 306
 307 /*
 308  * This function appends an 11n TLV to a buffer.
 309  *
 310  * Buffer allocation is responsibility of the calling
 311  * function. No size validation is made here.
 312  *
 313  * The function fills up the following sections, if applicable -
 314  *      - HT capability IE
 315  *      - HT information IE (with channel list)
 316  *      - 20/40 BSS Coexistence IE
 317  *      - HT Extended Capabilities IE
 318  */
 319 int
 320 mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 321                            struct mwifiex_bssdescriptor *bss_desc,
 322                            u8 **buffer)
 323 {
 324         struct mwifiex_ie_types_htcap *ht_cap;
 325         struct mwifiex_ie_types_htinfo *ht_info;
 326         struct mwifiex_ie_types_chan_list_param_set *chan_list;
 327         struct mwifiex_ie_types_2040bssco *bss_co_2040;
 328         struct mwifiex_ie_types_extcap *ext_cap;
 329         int ret_len = 0;
 330         struct ieee80211_supported_band *sband;
 331         u8 radio_type;
 332
 333         if (!buffer || !*buffer)
 334                 return ret_len;
 335
 336         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 337         sband = priv->wdev->wiphy->bands[radio_type];
 338
 339         if (bss_desc->bcn_ht_cap) {
 340                 ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
 341                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 342                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 343                 ht_cap->header.len =
 344                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 345                 memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
 346                        (u8 *)bss_desc->bcn_ht_cap,
 347                        le16_to_cpu(ht_cap->header.len));
 348
 349                 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
 350
 351                 *buffer += sizeof(struct mwifiex_ie_types_htcap);
 352                 ret_len += sizeof(struct mwifiex_ie_types_htcap);
 353         }
 354
 355         if (bss_desc->bcn_ht_info) {
 356                 if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 357                         ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
 358                         memset(ht_info, 0,
 359                                sizeof(struct mwifiex_ie_types_htinfo));
 360                         ht_info->header.type =
 361                                         cpu_to_le16(WLAN_EID_HT_INFORMATION);
 362                         ht_info->header.len =
 363                                 cpu_to_le16(sizeof(struct ieee80211_ht_info));
 364
 365                         memcpy((u8 *) ht_info +
 366                                sizeof(struct mwifiex_ie_types_header),
 367                                (u8 *) bss_desc->bcn_ht_info +
 368                                sizeof(struct ieee_types_header),
 369                                le16_to_cpu(ht_info->header.len));
 370
 371                         if (!(sband->ht_cap.cap &
 372                                         IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 373                                 ht_info->ht_info.ht_param &=
 374                                         ~(IEEE80211_HT_PARAM_CHAN_WIDTH_ANY |
 375                                         IEEE80211_HT_PARAM_CHA_SEC_OFFSET);
 376
 377                         *buffer += sizeof(struct mwifiex_ie_types_htinfo);
 378                         ret_len += sizeof(struct mwifiex_ie_types_htinfo);
 379                 }
 380
 381                 chan_list =
 382                         (struct mwifiex_ie_types_chan_list_param_set *) *buffer;
 383                 memset(chan_list, 0,
 384                        sizeof(struct mwifiex_ie_types_chan_list_param_set));
 385                 chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 386                 chan_list->header.len = cpu_to_le16(
 387                         sizeof(struct mwifiex_ie_types_chan_list_param_set) -
 388                         sizeof(struct mwifiex_ie_types_header));
 389                 chan_list->chan_scan_param[0].chan_number =
 390                         bss_desc->bcn_ht_info->control_chan;
 391                 chan_list->chan_scan_param[0].radio_type =
 392                         mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 393
 394                 if ((sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
 395                         && (bss_desc->bcn_ht_info->ht_param &
 396                                 IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
 397                         SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
 398                                           radio_type,
 399                                           (bss_desc->bcn_ht_info->ht_param &
 400                                           IEEE80211_HT_PARAM_CHA_SEC_OFFSET));
 401
 402                 *buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 403                 ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 404         }
 405
 406         if (bss_desc->bcn_bss_co_2040) {
 407                 bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
 408                 memset(bss_co_2040, 0,
 409                        sizeof(struct mwifiex_ie_types_2040bssco));
 410                 bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
 411                 bss_co_2040->header.len =
 412                        cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));
 413
 414                 memcpy((u8 *) bss_co_2040 +
 415                        sizeof(struct mwifiex_ie_types_header),
 416                        (u8 *) bss_desc->bcn_bss_co_2040 +
 417                        sizeof(struct ieee_types_header),
 418                        le16_to_cpu(bss_co_2040->header.len));
 419
 420                 *buffer += sizeof(struct mwifiex_ie_types_2040bssco);
 421                 ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
 422         }
 423
 424         if (bss_desc->bcn_ext_cap) {
 425                 ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
 426                 memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
 427                 ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
 428                 ext_cap->header.len = cpu_to_le16(sizeof(ext_cap->ext_cap));
 429
 430                 memcpy((u8 *) ext_cap +
 431                        sizeof(struct mwifiex_ie_types_header),
 432                        (u8 *) bss_desc->bcn_ext_cap +
 433                        sizeof(struct ieee_types_header),
 434                        le16_to_cpu(ext_cap->header.len));
 435
 436                 *buffer += sizeof(struct mwifiex_ie_types_extcap);
 437                 ret_len += sizeof(struct mwifiex_ie_types_extcap);
 438         }
 439
 440         return ret_len;
 441 }
 442
 443 /*
 444  * This function reconfigures the Tx buffer size in firmware.
 445  *
 446  * This function prepares a firmware command and issues it, if
 447  * the current Tx buffer size is different from the one requested.
 448  * Maximum configurable Tx buffer size is limited by the HT capability
 449  * field value.
 450  */
 451 void
 452 mwifiex_cfg_tx_buf(struct mwifiex_private *priv,
 453                    struct mwifiex_bssdescriptor *bss_desc)
 454 {
 455         u16 max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 456         u16 tx_buf, curr_tx_buf_size = 0;
 457
 458         if (bss_desc->bcn_ht_cap) {
 459                 if (le16_to_cpu(bss_desc->bcn_ht_cap->cap_info) &
 460                                 IEEE80211_HT_CAP_MAX_AMSDU)
 461                         max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_8K;
 462                 else
 463                         max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 464         }
 465
 466         tx_buf = min(priv->adapter->max_tx_buf_size, max_amsdu);
 467
 468         dev_dbg(priv->adapter->dev, "info: max_amsdu=%d, max_tx_buf=%d\n",
 469                         max_amsdu, priv->adapter->max_tx_buf_size);
 470
 471         if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_2K)
 472                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 473         else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_4K)
 474                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 475         else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_8K)
 476                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_8K;
 477         if (curr_tx_buf_size != tx_buf)
 478                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
 479                                        HostCmd_ACT_GEN_SET, 0, &tx_buf);
 480 }
 481
 482 /*
 483  * This function checks if the given pointer is valid entry of
 484  * Tx BA Stream table.
 485  */
 486 static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
 487                                 struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
 488 {
 489         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 490
 491         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 492                 if (tx_ba_tsr_tbl == tx_tbl_ptr)
 493                         return true;
 494         }
 495
 496         return false;
 497 }
 498
 499 /*
 500  * This function deletes the given entry in Tx BA Stream table.
 501  *
 502  * The function also performs a validity check on the supplied
 503  * pointer before trying to delete.
 504  */
 505 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
 506                                 struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
 507 {
 508         if (!tx_ba_tsr_tbl &&
 509                         mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
 510                 return;
 511
 512         dev_dbg(priv->adapter->dev, "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
 513
 514         list_del(&tx_ba_tsr_tbl->list);
 515
 516         kfree(tx_ba_tsr_tbl);
 517 }
 518
 519 /*
 520  * This function deletes all the entries in Tx BA Stream table.
 521  */
 522 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
 523 {
 524         int i;
 525         struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
 526         unsigned long flags;
 527
 528         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 529         list_for_each_entry_safe(del_tbl_ptr, tmp_node,
 530                                  &priv->tx_ba_stream_tbl_ptr, list)
 531                 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
 532         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 533
 534         INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 535
 536         for (i = 0; i < MAX_NUM_TID; ++i)
 537                 priv->aggr_prio_tbl[i].ampdu_ap =
 538                         priv->aggr_prio_tbl[i].ampdu_user;
 539 }
 540
 541 /*
 542  * This function returns the pointer to an entry in BA Stream
 543  * table which matches the given RA/TID pair.
 544  */
 545 struct mwifiex_tx_ba_stream_tbl *
 546 mwifiex_11n_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
 547                                  int tid, u8 *ra)
 548 {
 549         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 550         unsigned long flags;
 551
 552         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 553         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 554                 if ((!memcmp(tx_ba_tsr_tbl->ra, ra, ETH_ALEN))
 555                     && (tx_ba_tsr_tbl->tid == tid)) {
 556                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 557                                                flags);
 558                         return tx_ba_tsr_tbl;
 559                 }
 560         }
 561         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 562         return NULL;
 563 }
 564
 565 /*
 566  * This function creates an entry in Tx BA stream table for the
 567  * given RA/TID pair.
 568  */
 569 void mwifiex_11n_create_tx_ba_stream_tbl(struct mwifiex_private *priv,
 570                                          u8 *ra, int tid,
 571                                          enum mwifiex_ba_status ba_status)
 572 {
 573         struct mwifiex_tx_ba_stream_tbl *new_node;
 574         unsigned long flags;
 575
 576         if (!mwifiex_11n_get_tx_ba_stream_tbl(priv, tid, ra)) {
 577                 new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
 578                                    GFP_ATOMIC);
 579                 if (!new_node) {
 580                         dev_err(priv->adapter->dev,
 581                                 "%s: failed to alloc new_node\n", __func__);
 582                         return;
 583                 }
 584
 585                 INIT_LIST_HEAD(&new_node->list);
 586
 587                 new_node->tid = tid;
 588                 new_node->ba_status = ba_status;
 589                 memcpy(new_node->ra, ra, ETH_ALEN);
 590
 591                 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 592                 list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
 593                 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 594         }
 595 }
 596
 597 /*
 598  * This function sends an add BA request to the given TID/RA pair.
 599  */
 600 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
 601 {
 602         struct host_cmd_ds_11n_addba_req add_ba_req;
 603         static u8 dialog_tok;
 604         int ret;
 605
 606         dev_dbg(priv->adapter->dev, "cmd: %s: tid %d\n", __func__, tid);
 607
 608         add_ba_req.block_ack_param_set = cpu_to_le16(
 609                 (u16) ((tid << BLOCKACKPARAM_TID_POS) |
 610                          (priv->add_ba_param.
 611                           tx_win_size << BLOCKACKPARAM_WINSIZE_POS) |
 612                          IMMEDIATE_BLOCK_ACK));
 613         add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
 614
 615         ++dialog_tok;
 616
 617         if (dialog_tok == 0)
 618                 dialog_tok = 1;
 619
 620         add_ba_req.dialog_token = dialog_tok;
 621         memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
 622
 623         /* We don't wait for the response of this command */
 624         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_REQ,
 625                                      0, 0, &add_ba_req);
 626
 627         return ret;
 628 }
 629
 630 /*
 631  * This function sends a delete BA request to the given TID/RA pair.
 632  */
 633 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
 634                        int initiator)
 635 {
 636         struct host_cmd_ds_11n_delba delba;
 637         int ret;
 638         uint16_t del_ba_param_set;
 639
 640         memset(&delba, 0, sizeof(delba));
 641         delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
 642
 643         del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
 644         if (initiator)
 645                 del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 646         else
 647                 del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 648
 649         memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
 650
 651         /* We don't wait for the response of this command */
 652         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_DELBA,
 653                                      HostCmd_ACT_GEN_SET, 0, &delba);
 654
 655         return ret;
 656 }
 657
 658 /*
 659  * This function handles the command response of a delete BA request.
 660  */
 661 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
 662 {
 663         struct host_cmd_ds_11n_delba *cmd_del_ba =
 664                 (struct host_cmd_ds_11n_delba *) del_ba;
 665         uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
 666         int tid;
 667
 668         tid = del_ba_param_set >> DELBA_TID_POS;
 669
 670         mwifiex_11n_delete_ba_stream_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
 671                                          TYPE_DELBA_RECEIVE,
 672                                          INITIATOR_BIT(del_ba_param_set));
 673 }
 674
 675 /*
 676  * This function retrieves the Rx reordering table.
 677  */
 678 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
 679                                struct mwifiex_ds_rx_reorder_tbl *buf)
 680 {
 681         int i;
 682         struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
 683         struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
 684         int count = 0;
 685         unsigned long flags;
 686
 687         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 688         list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
 689                             list) {
 690                 rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
 691                 memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
 692                 rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
 693                 rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
 694                 for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
 695                         if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
 696                                 rx_reo_tbl->buffer[i] = true;
 697                         else
 698                                 rx_reo_tbl->buffer[i] = false;
 699                 }
 700                 rx_reo_tbl++;
 701                 count++;
 702
 703                 if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
 704                         break;
 705         }
 706         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 707
 708         return count;
 709 }
 710
 711 /*
 712  * This function retrieves the Tx BA stream table.
 713  */
 714 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
 715                                  struct mwifiex_ds_tx_ba_stream_tbl *buf)
 716 {
 717         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 718         struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
 719         int count = 0;
 720         unsigned long flags;
 721
 722         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 723         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 724                 rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
 725                 dev_dbg(priv->adapter->dev, "data: %s tid=%d\n",
 726                                                 __func__, rx_reo_tbl->tid);
 727                 memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
 728                 rx_reo_tbl++;
 729                 count++;
 730                 if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
 731                         break;
 732         }
 733         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 734
 735         return count;
 736 }