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 =
 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_del_ba_tbl(priv, tid, del_ba->peer_mac_addr,
 111                                    TYPE_DELBA_SENT,
 112                                    INITIATOR_BIT(del_ba_param_set));
 113
 114                 tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
 115                 if (tx_ba_tbl)
 116                         mwifiex_send_addba(priv, tx_ba_tbl->tid,
 117                                            tx_ba_tbl->ra);
 118         } else { /*
 119                   * In case of failure, recreate the deleted stream in case
 120                   * we initiated the ADDBA
 121                   */
 122                 if (!INITIATOR_BIT(del_ba_param_set))
 123                         return 0;
 124
 125                 mwifiex_create_ba_tbl(priv, del_ba->peer_mac_addr, tid,
 126                                       BA_SETUP_INPROGRESS);
 127
 128                 tx_ba_tbl = mwifiex_get_ba_status(priv, BA_SETUP_INPROGRESS);
 129
 130                 if (tx_ba_tbl)
 131                         mwifiex_del_ba_tbl(priv, tx_ba_tbl->tid, tx_ba_tbl->ra,
 132                                            TYPE_DELBA_SENT, true);
 133         }
 134
 135         return 0;
 136 }
 137
 138 /*
 139  * This function handles the command response of add a block
 140  * ack request.
 141  *
 142  * Handling includes changing the header fields to CPU formats, checking
 143  * the response success status and taking actions accordingly (delete the
 144  * BA stream table in case of failure).
 145  */
 146 int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
 147                               struct host_cmd_ds_command *resp)
 148 {
 149         int tid;
 150         struct host_cmd_ds_11n_addba_rsp *add_ba_rsp =
 151                 (struct host_cmd_ds_11n_addba_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 handles the command response of 11n configuration request.
 182  *
 183  * Handling includes changing the header fields into CPU format.
 184  */
 185 int mwifiex_ret_11n_cfg(struct host_cmd_ds_command *resp,
 186                         struct mwifiex_ds_11n_tx_cfg *tx_cfg)
 187 {
 188         struct host_cmd_ds_11n_cfg *htcfg = &resp->params.htcfg;
 189
 190         if (tx_cfg) {
 191                 tx_cfg->tx_htcap = le16_to_cpu(htcfg->ht_tx_cap);
 192                 tx_cfg->tx_htinfo = le16_to_cpu(htcfg->ht_tx_info);
 193         }
 194         return 0;
 195 }
 196
 197 /*
 198  * This function prepares command of reconfigure Tx buffer.
 199  *
 200  * Preparation includes -
 201  *      - Setting command ID, action and proper size
 202  *      - Setting Tx buffer size (for SET only)
 203  *      - Ensuring correct endian-ness
 204  */
 205 int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
 206                              struct host_cmd_ds_command *cmd, int cmd_action,
 207                              u16 *buf_size)
 208 {
 209         struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
 210         u16 action = (u16) cmd_action;
 211
 212         cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
 213         cmd->size =
 214                 cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
 215         tx_buf->action = cpu_to_le16(action);
 216         switch (action) {
 217         case HostCmd_ACT_GEN_SET:
 218                 dev_dbg(priv->adapter->dev, "cmd: set tx_buf=%d\n", *buf_size);
 219                 tx_buf->buff_size = cpu_to_le16(*buf_size);
 220                 break;
 221         case HostCmd_ACT_GEN_GET:
 222         default:
 223                 tx_buf->buff_size = 0;
 224                 break;
 225         }
 226         return 0;
 227 }
 228
 229 /*
 230  * This function prepares command of AMSDU aggregation control.
 231  *
 232  * Preparation includes -
 233  *      - Setting command ID, action and proper size
 234  *      - Setting AMSDU control parameters (for SET only)
 235  *      - Ensuring correct endian-ness
 236  */
 237 int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
 238                                 int cmd_action,
 239                                 struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
 240 {
 241         struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 242                 &cmd->params.amsdu_aggr_ctrl;
 243         u16 action = (u16) cmd_action;
 244
 245         cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
 246         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
 247                                 + S_DS_GEN);
 248         amsdu_ctrl->action = cpu_to_le16(action);
 249         switch (action) {
 250         case HostCmd_ACT_GEN_SET:
 251                 amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
 252                 amsdu_ctrl->curr_buf_size = 0;
 253                 break;
 254         case HostCmd_ACT_GEN_GET:
 255         default:
 256                 amsdu_ctrl->curr_buf_size = 0;
 257                 break;
 258         }
 259         return 0;
 260 }
 261
 262 /*
 263  * This function handles the command response of AMSDU aggregation
 264  * control request.
 265  *
 266  * Handling includes changing the header fields into CPU format.
 267  */
 268 int mwifiex_ret_amsdu_aggr_ctrl(struct host_cmd_ds_command *resp,
 269                                 struct mwifiex_ds_11n_amsdu_aggr_ctrl
 270                                 *amsdu_aggr_ctrl)
 271 {
 272         struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
 273                 &resp->params.amsdu_aggr_ctrl;
 274
 275         if (amsdu_aggr_ctrl) {
 276                 amsdu_aggr_ctrl->enable = le16_to_cpu(amsdu_ctrl->enable);
 277                 amsdu_aggr_ctrl->curr_buf_size =
 278                         le16_to_cpu(amsdu_ctrl->curr_buf_size);
 279         }
 280         return 0;
 281 }
 282
 283 /*
 284  * This function prepares 11n configuration command.
 285  *
 286  * Preparation includes -
 287  *      - Setting command ID, action and proper size
 288  *      - Setting HT Tx capability and HT Tx information fields
 289  *      - Ensuring correct endian-ness
 290  */
 291 int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd, u16 cmd_action,
 292                         struct mwifiex_ds_11n_tx_cfg *txcfg)
 293 {
 294         struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;
 295
 296         cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
 297         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
 298         htcfg->action = cpu_to_le16(cmd_action);
 299         htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
 300         htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
 301         return 0;
 302 }
 303
 304 /*
 305  * This function appends an 11n TLV to a buffer.
 306  *
 307  * Buffer allocation is responsibility of the calling
 308  * function. No size validation is made here.
 309  *
 310  * The function fills up the following sections, if applicable -
 311  *      - HT capability IE
 312  *      - HT information IE (with channel list)
 313  *      - 20/40 BSS Coexistence IE
 314  *      - HT Extended Capabilities IE
 315  */
 316 int
 317 mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 318                            struct mwifiex_bssdescriptor *bss_desc,
 319                            u8 **buffer)
 320 {
 321         struct mwifiex_ie_types_htcap *ht_cap;
 322         struct mwifiex_ie_types_htinfo *ht_info;
 323         struct mwifiex_ie_types_chan_list_param_set *chan_list;
 324         struct mwifiex_ie_types_2040bssco *bss_co_2040;
 325         struct mwifiex_ie_types_extcap *ext_cap;
 326         int ret_len = 0;
 327         struct ieee80211_supported_band *sband;
 328         u8 radio_type;
 329
 330         if (!buffer || !*buffer)
 331                 return ret_len;
 332
 333         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 334         sband = priv->wdev->wiphy->bands[radio_type];
 335
 336         if (bss_desc->bcn_ht_cap) {
 337                 ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
 338                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 339                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 340                 ht_cap->header.len =
 341                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 342                 memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
 343                        (u8 *) bss_desc->bcn_ht_cap +
 344                        sizeof(struct ieee_types_header),
 345                        le16_to_cpu(ht_cap->header.len));
 346
 347                 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
 348
 349                 *buffer += sizeof(struct mwifiex_ie_types_htcap);
 350                 ret_len += sizeof(struct mwifiex_ie_types_htcap);
 351         }
 352
 353         if (bss_desc->bcn_ht_oper) {
 354                 if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
 355                         ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
 356                         memset(ht_info, 0,
 357                                sizeof(struct mwifiex_ie_types_htinfo));
 358                         ht_info->header.type =
 359                                         cpu_to_le16(WLAN_EID_HT_OPERATION);
 360                         ht_info->header.len =
 361                                 cpu_to_le16(
 362                                         sizeof(struct ieee80211_ht_operation));
 363
 364                         memcpy((u8 *) ht_info +
 365                                sizeof(struct mwifiex_ie_types_header),
 366                                (u8 *) bss_desc->bcn_ht_oper +
 367                                sizeof(struct ieee_types_header),
 368                                le16_to_cpu(ht_info->header.len));
 369
 370                         if (!(sband->ht_cap.cap &
 371                                         IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 372                                 ht_info->ht_oper.ht_param &=
 373                                         ~(IEEE80211_HT_PARAM_CHAN_WIDTH_ANY |
 374                                         IEEE80211_HT_PARAM_CHA_SEC_OFFSET);
 375
 376                         *buffer += sizeof(struct mwifiex_ie_types_htinfo);
 377                         ret_len += sizeof(struct mwifiex_ie_types_htinfo);
 378                 }
 379
 380                 chan_list =
 381                         (struct mwifiex_ie_types_chan_list_param_set *) *buffer;
 382                 memset(chan_list, 0,
 383                        sizeof(struct mwifiex_ie_types_chan_list_param_set));
 384                 chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 385                 chan_list->header.len = cpu_to_le16(
 386                         sizeof(struct mwifiex_ie_types_chan_list_param_set) -
 387                         sizeof(struct mwifiex_ie_types_header));
 388                 chan_list->chan_scan_param[0].chan_number =
 389                         bss_desc->bcn_ht_oper->primary_chan;
 390                 chan_list->chan_scan_param[0].radio_type =
 391                         mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
 392
 393                 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
 394                     bss_desc->bcn_ht_oper->ht_param &
 395                     IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)
 396                         SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
 397                                           radio_type,
 398                                           (bss_desc->bcn_ht_oper->ht_param &
 399                                           IEEE80211_HT_PARAM_CHA_SEC_OFFSET));
 400
 401                 *buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 402                 ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
 403         }
 404
 405         if (bss_desc->bcn_bss_co_2040) {
 406                 bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
 407                 memset(bss_co_2040, 0,
 408                        sizeof(struct mwifiex_ie_types_2040bssco));
 409                 bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
 410                 bss_co_2040->header.len =
 411                        cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));
 412
 413                 memcpy((u8 *) bss_co_2040 +
 414                        sizeof(struct mwifiex_ie_types_header),
 415                        (u8 *) bss_desc->bcn_bss_co_2040 +
 416                        sizeof(struct ieee_types_header),
 417                        le16_to_cpu(bss_co_2040->header.len));
 418
 419                 *buffer += sizeof(struct mwifiex_ie_types_2040bssco);
 420                 ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
 421         }
 422
 423         if (bss_desc->bcn_ext_cap) {
 424                 ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
 425                 memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
 426                 ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
 427                 ext_cap->header.len = cpu_to_le16(sizeof(ext_cap->ext_cap));
 428
 429                 memcpy((u8 *) ext_cap +
 430                        sizeof(struct mwifiex_ie_types_header),
 431                        (u8 *) bss_desc->bcn_ext_cap +
 432                        sizeof(struct ieee_types_header),
 433                        le16_to_cpu(ext_cap->header.len));
 434
 435                 *buffer += sizeof(struct mwifiex_ie_types_extcap);
 436                 ret_len += sizeof(struct mwifiex_ie_types_extcap);
 437         }
 438
 439         return ret_len;
 440 }
 441
 442 /*
 443  * This function reconfigures the Tx buffer size in firmware.
 444  *
 445  * This function prepares a firmware command and issues it, if
 446  * the current Tx buffer size is different from the one requested.
 447  * Maximum configurable Tx buffer size is limited by the HT capability
 448  * field value.
 449  */
 450 void
 451 mwifiex_cfg_tx_buf(struct mwifiex_private *priv,
 452                    struct mwifiex_bssdescriptor *bss_desc)
 453 {
 454         u16 max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 455         u16 tx_buf, curr_tx_buf_size = 0;
 456
 457         if (bss_desc->bcn_ht_cap) {
 458                 if (le16_to_cpu(bss_desc->bcn_ht_cap->cap_info) &
 459                                 IEEE80211_HT_CAP_MAX_AMSDU)
 460                         max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_8K;
 461                 else
 462                         max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 463         }
 464
 465         tx_buf = min(priv->adapter->max_tx_buf_size, max_amsdu);
 466
 467         dev_dbg(priv->adapter->dev, "info: max_amsdu=%d, max_tx_buf=%d\n",
 468                 max_amsdu, priv->adapter->max_tx_buf_size);
 469
 470         if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_2K)
 471                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 472         else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_4K)
 473                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
 474         else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_8K)
 475                 curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_8K;
 476         if (curr_tx_buf_size != tx_buf)
 477                 mwifiex_send_cmd_async(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
 478                                        HostCmd_ACT_GEN_SET, 0, &tx_buf);
 479 }
 480
 481 /*
 482  * This function checks if the given pointer is valid entry of
 483  * Tx BA Stream table.
 484  */
 485 static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
 486                                 struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
 487 {
 488         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 489
 490         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 491                 if (tx_ba_tsr_tbl == tx_tbl_ptr)
 492                         return true;
 493         }
 494
 495         return false;
 496 }
 497
 498 /*
 499  * This function deletes the given entry in Tx BA Stream table.
 500  *
 501  * The function also performs a validity check on the supplied
 502  * pointer before trying to delete.
 503  */
 504 void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
 505                                 struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
 506 {
 507         if (!tx_ba_tsr_tbl &&
 508             mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
 509                 return;
 510
 511         dev_dbg(priv->adapter->dev, "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);
 512
 513         list_del(&tx_ba_tsr_tbl->list);
 514
 515         kfree(tx_ba_tsr_tbl);
 516 }
 517
 518 /*
 519  * This function deletes all the entries in Tx BA Stream table.
 520  */
 521 void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
 522 {
 523         int i;
 524         struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
 525         unsigned long flags;
 526
 527         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 528         list_for_each_entry_safe(del_tbl_ptr, tmp_node,
 529                                  &priv->tx_ba_stream_tbl_ptr, list)
 530                 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
 531         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 532
 533         INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 534
 535         for (i = 0; i < MAX_NUM_TID; ++i)
 536                 priv->aggr_prio_tbl[i].ampdu_ap =
 537                         priv->aggr_prio_tbl[i].ampdu_user;
 538 }
 539
 540 /*
 541  * This function returns the pointer to an entry in BA Stream
 542  * table which matches the given RA/TID pair.
 543  */
 544 struct mwifiex_tx_ba_stream_tbl *
 545 mwifiex_get_ba_tbl(struct mwifiex_private *priv, int tid, u8 *ra)
 546 {
 547         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 548         unsigned long flags;
 549
 550         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 551         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 552                 if (!memcmp(tx_ba_tsr_tbl->ra, ra, ETH_ALEN) &&
 553                     tx_ba_tsr_tbl->tid == tid) {
 554                         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
 555                                                flags);
 556                         return tx_ba_tsr_tbl;
 557                 }
 558         }
 559         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 560         return NULL;
 561 }
 562
 563 /*
 564  * This function creates an entry in Tx BA stream table for the
 565  * given RA/TID pair.
 566  */
 567 void mwifiex_create_ba_tbl(struct mwifiex_private *priv, u8 *ra, int tid,
 568                            enum mwifiex_ba_status ba_status)
 569 {
 570         struct mwifiex_tx_ba_stream_tbl *new_node;
 571         unsigned long flags;
 572
 573         if (!mwifiex_get_ba_tbl(priv, tid, ra)) {
 574                 new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
 575                                    GFP_ATOMIC);
 576                 if (!new_node) {
 577                         dev_err(priv->adapter->dev,
 578                                 "%s: failed to alloc new_node\n", __func__);
 579                         return;
 580                 }
 581
 582                 INIT_LIST_HEAD(&new_node->list);
 583
 584                 new_node->tid = tid;
 585                 new_node->ba_status = ba_status;
 586                 memcpy(new_node->ra, ra, ETH_ALEN);
 587
 588                 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 589                 list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
 590                 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 591         }
 592 }
 593
 594 /*
 595  * This function sends an add BA request to the given TID/RA pair.
 596  */
 597 int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
 598 {
 599         struct host_cmd_ds_11n_addba_req add_ba_req;
 600         static u8 dialog_tok;
 601         int ret;
 602
 603         dev_dbg(priv->adapter->dev, "cmd: %s: tid %d\n", __func__, tid);
 604
 605         add_ba_req.block_ack_param_set = cpu_to_le16(
 606                 (u16) ((tid << BLOCKACKPARAM_TID_POS) |
 607                          (priv->add_ba_param.
 608                           tx_win_size << BLOCKACKPARAM_WINSIZE_POS) |
 609                          IMMEDIATE_BLOCK_ACK));
 610         add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);
 611
 612         ++dialog_tok;
 613
 614         if (dialog_tok == 0)
 615                 dialog_tok = 1;
 616
 617         add_ba_req.dialog_token = dialog_tok;
 618         memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);
 619
 620         /* We don't wait for the response of this command */
 621         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_REQ,
 622                                      0, 0, &add_ba_req);
 623
 624         return ret;
 625 }
 626
 627 /*
 628  * This function sends a delete BA request to the given TID/RA pair.
 629  */
 630 int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
 631                        int initiator)
 632 {
 633         struct host_cmd_ds_11n_delba delba;
 634         int ret;
 635         uint16_t del_ba_param_set;
 636
 637         memset(&delba, 0, sizeof(delba));
 638         delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);
 639
 640         del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
 641         if (initiator)
 642                 del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 643         else
 644                 del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;
 645
 646         memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);
 647
 648         /* We don't wait for the response of this command */
 649         ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_DELBA,
 650                                      HostCmd_ACT_GEN_SET, 0, &delba);
 651
 652         return ret;
 653 }
 654
 655 /*
 656  * This function handles the command response of a delete BA request.
 657  */
 658 void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
 659 {
 660         struct host_cmd_ds_11n_delba *cmd_del_ba =
 661                 (struct host_cmd_ds_11n_delba *) del_ba;
 662         uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
 663         int tid;
 664
 665         tid = del_ba_param_set >> DELBA_TID_POS;
 666
 667         mwifiex_del_ba_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
 668                            TYPE_DELBA_RECEIVE, INITIATOR_BIT(del_ba_param_set));
 669 }
 670
 671 /*
 672  * This function retrieves the Rx reordering table.
 673  */
 674 int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
 675                                struct mwifiex_ds_rx_reorder_tbl *buf)
 676 {
 677         int i;
 678         struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
 679         struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
 680         int count = 0;
 681         unsigned long flags;
 682
 683         spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
 684         list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
 685                             list) {
 686                 rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
 687                 memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
 688                 rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
 689                 rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
 690                 for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
 691                         if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
 692                                 rx_reo_tbl->buffer[i] = true;
 693                         else
 694                                 rx_reo_tbl->buffer[i] = false;
 695                 }
 696                 rx_reo_tbl++;
 697                 count++;
 698
 699                 if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
 700                         break;
 701         }
 702         spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
 703
 704         return count;
 705 }
 706
 707 /*
 708  * This function retrieves the Tx BA stream table.
 709  */
 710 int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
 711                                  struct mwifiex_ds_tx_ba_stream_tbl *buf)
 712 {
 713         struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
 714         struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
 715         int count = 0;
 716         unsigned long flags;
 717
 718         spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
 719         list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
 720                 rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
 721                 dev_dbg(priv->adapter->dev, "data: %s tid=%d\n",
 722                         __func__, rx_reo_tbl->tid);
 723                 memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
 724                 rx_reo_tbl++;
 725                 count++;
 726                 if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
 727                         break;
 728         }
 729         spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
 730
 731         return count;
 732 }