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         struct ieee_types_header *hdr;
 296         u8 radio_type;
 297
 298         if (!buffer || !*buffer)
 299                 return ret_len;
 300
 301         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 302         sband = priv->wdev->wiphy->bands[radio_type];
 303
 304         if (bss_desc->bcn_ht_cap) {
 305                 ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
 306                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 307                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 308                 ht_cap->header.len =
 309                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 310                 memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
 311                        (u8 *)bss_desc->bcn_ht_cap,
 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                 hdr = (void *)bss_desc->bcn_ext_cap;
 392                 ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
 393                 memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
 394                 ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
 395                 ext_cap->header.len = cpu_to_le16(hdr->len);
 396
 397                 memcpy((u8 *)ext_cap->ext_capab,
 398                        bss_desc->bcn_ext_cap + sizeof(struct ieee_types_header),
 399                        le16_to_cpu(ext_cap->header.len));
 400
 401                 if (hdr->len > 3 &&
 402                     ext_cap->ext_capab[3] & WLAN_EXT_CAPA4_INTERWORKING_ENABLED)
 403                         priv->hs2_enabled = true;
 404                 else
 405                         priv->hs2_enabled = false;
 406
 407                 *buffer += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
 408                 ret_len += sizeof(struct mwifiex_ie_types_extcap) + hdr->len;
 409         }
 410
 411         return ret_len;
 412 }
 413
 414 /*
 415  * This function checks if the given pointer is valid entry of
 416  * Tx BA Stream table.
 417  */
 418 static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
 419                                 struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
 420 {
 421         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 422
 423         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 424                 if (tx_ba_tsr_tbl == tx_tbl_ptr)
 425                         return true;
 426         }
 427
 428         return false;
 429 }
 430
 431 /*
 432  * This function deletes the given entry in Tx BA Stream table.
 433  *
 434  * The function also performs a validity check on the supplied
 435  * pointer before trying to delete.
 436  */
 437 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
 438                                 struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
 439 {
 440         if (!tx_ba_tsr_tbl &&
 441             mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
 442                 return;
 443
 444         dev_dbg(priv->adapter->dev, "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
 445
 446         list_del(&tx_ba_tsr_tbl->list);
 447
 448         kfree(tx_ba_tsr_tbl);
 449 }
 450
 451 /*
 452  * This function deletes all the entries in Tx BA Stream table.
 453  */
 454 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
 455 {
 456         int i;
 457         struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
 458         unsigned long flags;
 459
 460         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 461         list_for_each_entry_safe(del_tbl_ptr, tmp_node,
 462                                  &priv->tx_ba_stream_tbl_ptr, list)
 463                 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
 464         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 465
 466         INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 467
 468         for (i = 0; i < MAX_NUM_TID; ++i)
 469                 priv->aggr_prio_tbl[i].ampdu_ap =
 470                         priv->aggr_prio_tbl[i].ampdu_user;
 471 }
 472
 473 /*
 474  * This function returns the pointer to an entry in BA Stream
 475  * table which matches the given RA/TID pair.
 476  */
 477 struct mwifiex_tx_ba_stream_tbl *
 478 mwifiex_get_ba_tbl(struct mwifiex_private *priv, int tid, u8 *ra)
 479 {
 480         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 481         unsigned long flags;
 482
 483         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 484         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 485                 if (ether_addr_equal_unaligned(tx_ba_tsr_tbl->ra, ra) &&
 486                     tx_ba_tsr_tbl->tid == tid) {
 487                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 488                                                flags);
 489                         return tx_ba_tsr_tbl;
 490                 }
 491         }
 492         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 493         return NULL;
 494 }
 495
 496 /*
 497  * This function creates an entry in Tx BA stream table for the
 498  * given RA/TID pair.
 499  */
 500 void mwifiex_create_ba_tbl(struct mwifiex_private *priv, u8 *ra, int tid,
 501                            enum mwifiex_ba_status ba_status)
 502 {
 503         struct mwifiex_tx_ba_stream_tbl *new_node;
 504         unsigned long flags;
 505
 506         if (!mwifiex_get_ba_tbl(priv, tid, ra)) {
 507                 new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
 508                                    GFP_ATOMIC);
 509                 if (!new_node)
 510                         return;
 511
 512                 INIT_LIST_HEAD(&new_node->list);
 513
 514                 new_node->tid = tid;
 515                 new_node->ba_status = ba_status;
 516                 memcpy(new_node->ra, ra, ETH_ALEN);
 517
 518                 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 519                 list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
 520                 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 521         }
 522 }
 523
 524 /*
 525  * This function sends an add BA request to the given TID/RA pair.
 526  */
 527 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
 528 {
 529         struct host_cmd_ds_11n_addba_req add_ba_req;
 530         static u8 dialog_tok;
 531         int ret;
 532
 533         dev_dbg(priv->adapter->dev, "cmd: %s: tid %d\n", __func__, tid);
 534
 535         add_ba_req.block_ack_param_set = cpu_to_le16(
 536                 (u16) ((tid << BLOCKACKPARAM_TID_POS) |
 537                          (priv->add_ba_param.
 538                           tx_win_size << BLOCKACKPARAM_WINSIZE_POS) |
 539                          IMMEDIATE_BLOCK_ACK));
 540         add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
 541
 542         ++dialog_tok;
 543
 544         if (dialog_tok == 0)
 545                 dialog_tok = 1;
 546
 547         add_ba_req.dialog_token = dialog_tok;
 548         memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
 549
 550         /* We don't wait for the response of this command */
 551         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_REQ,
 552                                      0, 0, &add_ba_req);
 553
 554         return ret;
 555 }
 556
 557 /*
 558  * This function sends a delete BA request to the given TID/RA pair.
 559  */
 560 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
 561                        int initiator)
 562 {
 563         struct host_cmd_ds_11n_delba delba;
 564         int ret;
 565         uint16_t del_ba_param_set;
 566
 567         memset(&delba, 0, sizeof(delba));
 568         delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
 569
 570         del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
 571         if (initiator)
 572                 del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 573         else
 574                 del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 575
 576         memcpy(&delba.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_DELBA,
 580                                      HostCmd_ACT_GEN_SET, 0, &delba);
 581
 582         return ret;
 583 }
 584
 585 /*
 586  * This function handles the command response of a delete BA request.
 587  */
 588 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
 589 {
 590         struct host_cmd_ds_11n_delba *cmd_del_ba =
 591                 (struct host_cmd_ds_11n_delba *) del_ba;
 592         uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
 593         int tid;
 594
 595         tid = del_ba_param_set >> DELBA_TID_POS;
 596
 597         mwifiex_del_ba_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
 598                            TYPE_DELBA_RECEIVE, INITIATOR_BIT(del_ba_param_set));
 599 }
 600
 601 /*
 602  * This function retrieves the Rx reordering table.
 603  */
 604 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
 605                                struct mwifiex_ds_rx_reorder_tbl *buf)
 606 {
 607         int i;
 608         struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
 609         struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
 610         int count = 0;
 611         unsigned long flags;
 612
 613         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 614         list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
 615                             list) {
 616                 rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
 617                 memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
 618                 rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
 619                 rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
 620                 for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
 621                         if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
 622                                 rx_reo_tbl->buffer[i] = true;
 623                         else
 624                                 rx_reo_tbl->buffer[i] = false;
 625                 }
 626                 rx_reo_tbl++;
 627                 count++;
 628
 629                 if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
 630                         break;
 631         }
 632         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 633
 634         return count;
 635 }
 636
 637 /*
 638  * This function retrieves the Tx BA stream table.
 639  */
 640 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
 641                                  struct mwifiex_ds_tx_ba_stream_tbl *buf)
 642 {
 643         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 644         struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
 645         int count = 0;
 646         unsigned long flags;
 647
 648         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 649         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 650                 rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
 651                 dev_dbg(priv->adapter->dev, "data: %s tid=%d\n",
 652                         __func__, rx_reo_tbl->tid);
 653                 memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
 654                 rx_reo_tbl++;
 655                 count++;
 656                 if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
 657                         break;
 658         }
 659         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 660
 661         return count;
 662 }
 663
 664 /*
 665  * This function retrieves the entry for specific tx BA stream table by RA and
 666  * deletes it.
 667  */
 668 void mwifiex_del_tx_ba_stream_tbl_by_ra(struct mwifiex_private *priv, u8 *ra)
 669 {
 670         struct mwifiex_tx_ba_stream_tbl *tbl, *tmp;
 671         unsigned long flags;
 672
 673         if (!ra)
 674                 return;
 675
 676         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 677         list_for_each_entry_safe(tbl, tmp, &priv->tx_ba_stream_tbl_ptr, list) {
 678                 if (!memcmp(tbl->ra, ra, ETH_ALEN)) {
 679                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 680                                                flags);
 681                         mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, tbl);
 682                         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 683                 }
 684         }
 685         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 686
 687         return;
 688 }
 689
 690 /* This function initializes the BlockACK setup information for given
 691  * mwifiex_private structure.
 692  */
 693 void mwifiex_set_ba_params(struct mwifiex_private *priv)
 694 {
 695         priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
 696
 697         if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
 698                 priv->add_ba_param.tx_win_size =
 699                                                 MWIFIEX_UAP_AMPDU_DEF_TXWINSIZE;
 700                 priv->add_ba_param.rx_win_size =
 701                                                 MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE;
 702         } else {
 703                 priv->add_ba_param.tx_win_size =
 704                                                 MWIFIEX_STA_AMPDU_DEF_TXWINSIZE;
 705                 priv->add_ba_param.rx_win_size =
 706                                                 MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
 707         }
 708
 709         return;
 710 }