drivers/net/wireless/mwifiex/tdls.c

   1 /* Marvell Wireless LAN device driver: TDLS handling
   2  *
   3  * Copyright (C) 2014, Marvell International Ltd.
   4  *
   5  * This software file (the "File") is distributed by Marvell International
   6  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   7  * (the "License").  You may use, redistribute and/or modify this File in
   8  * accordance with the terms and conditions of the License, a copy of which
   9  * is available on the worldwide web at
  10  * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  11  *
  12  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  13  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  14  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  15  * this warranty disclaimer.
  16  */
  17
  18 #include "main.h"
  19 #include "wmm.h"
  20 #include "11n.h"
  21 #include "11n_rxreorder.h"
  22 #include "11ac.h"
  23
  24 #define TDLS_REQ_FIX_LEN      6
  25 #define TDLS_RESP_FIX_LEN     8
  26 #define TDLS_CONFIRM_FIX_LEN  6
  27 #define MWIFIEX_TDLS_WMM_INFO_SIZE 7
  28
  29 static void mwifiex_restore_tdls_packets(struct mwifiex_private *priv,
  30                                          const u8 *mac, u8 status)
  31 {
  32         struct mwifiex_ra_list_tbl *ra_list;
  33         struct list_head *tid_list;
  34         struct sk_buff *skb, *tmp;
  35         struct mwifiex_txinfo *tx_info;
  36         unsigned long flags;
  37         u32 tid;
  38         u8 tid_down;
  39
  40         mwifiex_dbg(priv->adapter, DATA, "%s: %pM\n", __func__, mac);
  41         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
  42
  43         skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) {
  44                 if (!ether_addr_equal(mac, skb->data))
  45                         continue;
  46
  47                 __skb_unlink(skb, &priv->tdls_txq);
  48                 tx_info = MWIFIEX_SKB_TXCB(skb);
  49                 tid = skb->priority;
  50                 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
  51
  52                 if (status == TDLS_SETUP_COMPLETE) {
  53                         ra_list = mwifiex_wmm_get_queue_raptr(priv, tid, mac);
  54                         ra_list->tdls_link = true;
  55                         tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
  56                 } else {
  57                         tid_list = &priv->wmm.tid_tbl_ptr[tid_down].ra_list;
  58                         if (!list_empty(tid_list))
  59                                 ra_list = list_first_entry(tid_list,
  60                                               struct mwifiex_ra_list_tbl, list);
  61                         else
  62                                 ra_list = NULL;
  63                         tx_info->flags &= ~MWIFIEX_BUF_FLAG_TDLS_PKT;
  64                 }
  65
  66                 if (!ra_list) {
  67                         mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
  68                         continue;
  69                 }
  70
  71                 skb_queue_tail(&ra_list->skb_head, skb);
  72
  73                 ra_list->ba_pkt_count++;
  74                 ra_list->total_pkt_count++;
  75
  76                 if (atomic_read(&priv->wmm.highest_queued_prio) <
  77                                                        tos_to_tid_inv[tid_down])
  78                         atomic_set(&priv->wmm.highest_queued_prio,
  79                                    tos_to_tid_inv[tid_down]);
  80
  81                 atomic_inc(&priv->wmm.tx_pkts_queued);
  82         }
  83
  84         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
  85         return;
  86 }
  87
  88 static void mwifiex_hold_tdls_packets(struct mwifiex_private *priv,
  89                                       const u8 *mac)
  90 {
  91         struct mwifiex_ra_list_tbl *ra_list;
  92         struct list_head *ra_list_head;
  93         struct sk_buff *skb, *tmp;
  94         unsigned long flags;
  95         int i;
  96
  97         mwifiex_dbg(priv->adapter, DATA, "%s: %pM\n", __func__, mac);
  98         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
  99
 100         for (i = 0; i < MAX_NUM_TID; i++) {
 101                 if (!list_empty(&priv->wmm.tid_tbl_ptr[i].ra_list)) {
 102                         ra_list_head = &priv->wmm.tid_tbl_ptr[i].ra_list;
 103                         list_for_each_entry(ra_list, ra_list_head, list) {
 104                                 skb_queue_walk_safe(&ra_list->skb_head, skb,
 105                                                     tmp) {
 106                                         if (!ether_addr_equal(mac, skb->data))
 107                                                 continue;
 108                                         __skb_unlink(skb, &ra_list->skb_head);
 109                                         atomic_dec(&priv->wmm.tx_pkts_queued);
 110                                         ra_list->total_pkt_count--;
 111                                         skb_queue_tail(&priv->tdls_txq, skb);
 112                                 }
 113                         }
 114                 }
 115         }
 116
 117         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 118         return;
 119 }
 120
 121 /* This function appends rate TLV to scan config command. */
 122 static int
 123 mwifiex_tdls_append_rates_ie(struct mwifiex_private *priv,
 124                              struct sk_buff *skb)
 125 {
 126         u8 rates[MWIFIEX_SUPPORTED_RATES], *pos;
 127         u16 rates_size, supp_rates_size, ext_rates_size;
 128
 129         memset(rates, 0, sizeof(rates));
 130         rates_size = mwifiex_get_supported_rates(priv, rates);
 131
 132         supp_rates_size = min_t(u16, rates_size, MWIFIEX_TDLS_SUPPORTED_RATES);
 133
 134         if (skb_tailroom(skb) < rates_size + 4) {
 135                 mwifiex_dbg(priv->adapter, ERROR,
 136                             "Insuffient space while adding rates\n");
 137                 return -ENOMEM;
 138         }
 139
 140         pos = skb_put(skb, supp_rates_size + 2);
 141         *pos++ = WLAN_EID_SUPP_RATES;
 142         *pos++ = supp_rates_size;
 143         memcpy(pos, rates, supp_rates_size);
 144
 145         if (rates_size > MWIFIEX_TDLS_SUPPORTED_RATES) {
 146                 ext_rates_size = rates_size - MWIFIEX_TDLS_SUPPORTED_RATES;
 147                 pos = skb_put(skb, ext_rates_size + 2);
 148                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 149                 *pos++ = ext_rates_size;
 150                 memcpy(pos, rates + MWIFIEX_TDLS_SUPPORTED_RATES,
 151                        ext_rates_size);
 152         }
 153
 154         return 0;
 155 }
 156
 157 static void mwifiex_tdls_add_aid(struct mwifiex_private *priv,
 158                                 struct sk_buff *skb)
 159 {
 160         struct ieee_types_assoc_rsp *assoc_rsp;
 161         u8 *pos;
 162
 163         assoc_rsp = (struct ieee_types_assoc_rsp *)&priv->assoc_rsp_buf;
 164         pos = (void *)skb_put(skb, 4);
 165         *pos++ = WLAN_EID_AID;
 166         *pos++ = 2;
 167         *pos++ = le16_to_cpu(assoc_rsp->a_id);
 168
 169         return;
 170 }
 171
 172 static int mwifiex_tdls_add_vht_capab(struct mwifiex_private *priv,
 173                                       struct sk_buff *skb)
 174 {
 175         struct ieee80211_vht_cap vht_cap;
 176         u8 *pos;
 177
 178         pos = (void *)skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 179         *pos++ = WLAN_EID_VHT_CAPABILITY;
 180         *pos++ = sizeof(struct ieee80211_vht_cap);
 181
 182         memset(&vht_cap, 0, sizeof(struct ieee80211_vht_cap));
 183
 184         mwifiex_fill_vht_cap_tlv(priv, &vht_cap, priv->curr_bss_params.band);
 185         memcpy(pos, &vht_cap, sizeof(vht_cap));
 186
 187         return 0;
 188 }
 189
 190 static int
 191 mwifiex_tdls_add_ht_oper(struct mwifiex_private *priv, const u8 *mac,
 192                          u8 vht_enabled, struct sk_buff *skb)
 193 {
 194         struct ieee80211_ht_operation *ht_oper;
 195         struct mwifiex_sta_node *sta_ptr;
 196         struct mwifiex_bssdescriptor *bss_desc =
 197                                         &priv->curr_bss_params.bss_descriptor;
 198         u8 *pos;
 199
 200         sta_ptr = mwifiex_get_sta_entry(priv, mac);
 201         if (unlikely(!sta_ptr)) {
 202                 mwifiex_dbg(priv->adapter, ERROR,
 203                             "TDLS peer station not found in list\n");
 204                 return -1;
 205         }
 206
 207         pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_operation) + 2);
 208         *pos++ = WLAN_EID_HT_OPERATION;
 209         *pos++ = sizeof(struct ieee80211_ht_operation);
 210         ht_oper = (void *)pos;
 211
 212         ht_oper->primary_chan = bss_desc->channel;
 213
 214         /* follow AP's channel bandwidth */
 215         if (ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&
 216             bss_desc->bcn_ht_cap &&
 217             ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_oper->ht_param))
 218                 ht_oper->ht_param = bss_desc->bcn_ht_oper->ht_param;
 219
 220         if (vht_enabled) {
 221                 ht_oper->ht_param =
 222                           mwifiex_get_sec_chan_offset(bss_desc->channel);
 223                 ht_oper->ht_param |= BIT(2);
 224         }
 225
 226         memcpy(&sta_ptr->tdls_cap.ht_oper, ht_oper,
 227                sizeof(struct ieee80211_ht_operation));
 228
 229         return 0;
 230 }
 231
 232 static int mwifiex_tdls_add_vht_oper(struct mwifiex_private *priv,
 233                                      const u8 *mac, struct sk_buff *skb)
 234 {
 235         struct mwifiex_bssdescriptor *bss_desc;
 236         struct ieee80211_vht_operation *vht_oper;
 237         struct ieee80211_vht_cap *vht_cap, *ap_vht_cap = NULL;
 238         struct mwifiex_sta_node *sta_ptr;
 239         struct mwifiex_adapter *adapter = priv->adapter;
 240         u8 supp_chwd_set, peer_supp_chwd_set;
 241         u8 *pos, ap_supp_chwd_set, chan_bw;
 242         u16 mcs_map_user, mcs_map_resp, mcs_map_result;
 243         u16 mcs_user, mcs_resp, nss;
 244         u32 usr_vht_cap_info;
 245
 246         bss_desc = &priv->curr_bss_params.bss_descriptor;
 247
 248         sta_ptr = mwifiex_get_sta_entry(priv, mac);
 249         if (unlikely(!sta_ptr)) {
 250                 mwifiex_dbg(adapter, ERROR,
 251                             "TDLS peer station not found in list\n");
 252                 return -1;
 253         }
 254
 255         if (!mwifiex_is_bss_in_11ac_mode(priv)) {
 256                 if (sta_ptr->tdls_cap.extcap.ext_capab[7] &
 257                    WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
 258                         mwifiex_dbg(adapter, WARN,
 259                                     "TDLS peer doesn't support wider bandwidth\n");
 260                         return 0;
 261                 }
 262         } else {
 263                 ap_vht_cap = bss_desc->bcn_vht_cap;
 264         }
 265
 266         pos = (void *)skb_put(skb, sizeof(struct ieee80211_vht_operation) + 2);
 267         *pos++ = WLAN_EID_VHT_OPERATION;
 268         *pos++ = sizeof(struct ieee80211_vht_operation);
 269         vht_oper = (struct ieee80211_vht_operation *)pos;
 270
 271         if (bss_desc->bss_band & BAND_A)
 272                 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
 273         else
 274                 usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
 275
 276         /* find the minmum bandwith between AP/TDLS peers */
 277         vht_cap = &sta_ptr->tdls_cap.vhtcap;
 278         supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);
 279         peer_supp_chwd_set =
 280                          GET_VHTCAP_CHWDSET(le32_to_cpu(vht_cap->vht_cap_info));
 281         supp_chwd_set = min_t(u8, supp_chwd_set, peer_supp_chwd_set);
 282
 283         /* We need check AP's bandwidth when TDLS_WIDER_BANDWIDTH is off */
 284
 285         if (ap_vht_cap && sta_ptr->tdls_cap.extcap.ext_capab[7] &
 286             WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
 287                 ap_supp_chwd_set =
 288                       GET_VHTCAP_CHWDSET(le32_to_cpu(ap_vht_cap->vht_cap_info));
 289                 supp_chwd_set = min_t(u8, supp_chwd_set, ap_supp_chwd_set);
 290         }
 291
 292         switch (supp_chwd_set) {
 293         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 294                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
 295                 break;
 296         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 297                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
 298                 break;
 299         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 300                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
 301                 break;
 302         default:
 303                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
 304                 break;
 305         }
 306
 307         mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
 308         mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.rx_mcs_map);
 309         mcs_map_result = 0;
 310
 311         for (nss = 1; nss <= 8; nss++) {
 312                 mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
 313                 mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
 314
 315                 if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) ||
 316                     (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED))
 317                         SET_VHTNSSMCS(mcs_map_result, nss,
 318                                       IEEE80211_VHT_MCS_NOT_SUPPORTED);
 319                 else
 320                         SET_VHTNSSMCS(mcs_map_result, nss,
 321                                       min_t(u16, mcs_user, mcs_resp));
 322         }
 323
 324         vht_oper->basic_mcs_set = cpu_to_le16(mcs_map_result);
 325
 326         switch (vht_oper->chan_width) {
 327         case IEEE80211_VHT_CHANWIDTH_80MHZ:
 328                 chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
 329                 break;
 330         case IEEE80211_VHT_CHANWIDTH_160MHZ:
 331                 chan_bw = IEEE80211_VHT_CHANWIDTH_160MHZ;
 332                 break;
 333         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
 334                 chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
 335                 break;
 336         default:
 337                 chan_bw = IEEE80211_VHT_CHANWIDTH_USE_HT;
 338                 break;
 339         }
 340         vht_oper->center_freq_seg1_idx =
 341                         mwifiex_get_center_freq_index(priv, BAND_AAC,
 342                                                       bss_desc->channel,
 343                                                       chan_bw);
 344
 345         return 0;
 346 }
 347
 348 static void mwifiex_tdls_add_ext_capab(struct mwifiex_private *priv,
 349                                        struct sk_buff *skb)
 350 {
 351         struct ieee_types_extcap *extcap;
 352
 353         extcap = (void *)skb_put(skb, sizeof(struct ieee_types_extcap));
 354         extcap->ieee_hdr.element_id = WLAN_EID_EXT_CAPABILITY;
 355         extcap->ieee_hdr.len = 8;
 356         memset(extcap->ext_capab, 0, 8);
 357         extcap->ext_capab[4] |= WLAN_EXT_CAPA5_TDLS_ENABLED;
 358
 359         if (priv->adapter->is_hw_11ac_capable)
 360                 extcap->ext_capab[7] |= WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED;
 361 }
 362
 363 static void mwifiex_tdls_add_qos_capab(struct sk_buff *skb)
 364 {
 365         u8 *pos = (void *)skb_put(skb, 3);
 366
 367         *pos++ = WLAN_EID_QOS_CAPA;
 368         *pos++ = 1;
 369         *pos++ = MWIFIEX_TDLS_DEF_QOS_CAPAB;
 370 }
 371
 372 static void
 373 mwifiex_tdls_add_wmm_param_ie(struct mwifiex_private *priv, struct sk_buff *skb)
 374 {
 375         struct ieee80211_wmm_param_ie *wmm;
 376         u8 ac_vi[] = {0x42, 0x43, 0x5e, 0x00};
 377         u8 ac_vo[] = {0x62, 0x32, 0x2f, 0x00};
 378         u8 ac_be[] = {0x03, 0xa4, 0x00, 0x00};
 379         u8 ac_bk[] = {0x27, 0xa4, 0x00, 0x00};
 380
 381         wmm = (void *)skb_put(skb, sizeof(*wmm));
 382         memset(wmm, 0, sizeof(*wmm));
 383
 384         wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
 385         wmm->len = sizeof(*wmm) - 2;
 386         wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
 387         wmm->oui[1] = 0x50;
 388         wmm->oui[2] = 0xf2;
 389         wmm->oui_type = 2; /* WME */
 390         wmm->oui_subtype = 1; /* WME param */
 391         wmm->version = 1; /* WME ver */
 392         wmm->qos_info = 0; /* U-APSD not in use */
 393
 394         /* use default WMM AC parameters for TDLS link*/
 395         memcpy(&wmm->ac[0], ac_be, sizeof(ac_be));
 396         memcpy(&wmm->ac[1], ac_bk, sizeof(ac_bk));
 397         memcpy(&wmm->ac[2], ac_vi, sizeof(ac_vi));
 398         memcpy(&wmm->ac[3], ac_vo, sizeof(ac_vo));
 399 }
 400
 401 static void
 402 mwifiex_add_wmm_info_ie(struct mwifiex_private *priv, struct sk_buff *skb,
 403                         u8 qosinfo)
 404 {
 405         u8 *buf;
 406
 407         buf = (void *)skb_put(skb, MWIFIEX_TDLS_WMM_INFO_SIZE +
 408                               sizeof(struct ieee_types_header));
 409
 410         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
 411         *buf++ = 7; /* len */
 412         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
 413         *buf++ = 0x50;
 414         *buf++ = 0xf2;
 415         *buf++ = 2; /* WME */
 416         *buf++ = 0; /* WME info */
 417         *buf++ = 1; /* WME ver */
 418         *buf++ = qosinfo; /* U-APSD no in use */
 419 }
 420
 421 static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
 422                                         const u8 *peer, u8 action_code,
 423                                         u8 dialog_token,
 424                                         u16 status_code, struct sk_buff *skb)
 425 {
 426         struct ieee80211_tdls_data *tf;
 427         int ret;
 428         u16 capab;
 429         struct ieee80211_ht_cap *ht_cap;
 430         u8 radio, *pos;
 431
 432         capab = priv->curr_bss_params.bss_descriptor.cap_info_bitmap;
 433
 434         tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
 435         memcpy(tf->da, peer, ETH_ALEN);
 436         memcpy(tf->sa, priv->curr_addr, ETH_ALEN);
 437         tf->ether_type = cpu_to_be16(ETH_P_TDLS);
 438         tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
 439
 440         switch (action_code) {
 441         case WLAN_TDLS_SETUP_REQUEST:
 442                 tf->category = WLAN_CATEGORY_TDLS;
 443                 tf->action_code = WLAN_TDLS_SETUP_REQUEST;
 444                 skb_put(skb, sizeof(tf->u.setup_req));
 445                 tf->u.setup_req.dialog_token = dialog_token;
 446                 tf->u.setup_req.capability = cpu_to_le16(capab);
 447                 ret = mwifiex_tdls_append_rates_ie(priv, skb);
 448                 if (ret) {
 449                         dev_kfree_skb_any(skb);
 450                         return ret;
 451                 }
 452
 453                 pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 454                 *pos++ = WLAN_EID_HT_CAPABILITY;
 455                 *pos++ = sizeof(struct ieee80211_ht_cap);
 456                 ht_cap = (void *)pos;
 457                 radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
 458                 ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
 459                 if (ret) {
 460                         dev_kfree_skb_any(skb);
 461                         return ret;
 462                 }
 463
 464                 if (priv->adapter->is_hw_11ac_capable) {
 465                         ret = mwifiex_tdls_add_vht_capab(priv, skb);
 466                         if (ret) {
 467                                 dev_kfree_skb_any(skb);
 468                                 return ret;
 469                         }
 470                         mwifiex_tdls_add_aid(priv, skb);
 471                 }
 472
 473                 mwifiex_tdls_add_ext_capab(priv, skb);
 474                 mwifiex_tdls_add_qos_capab(skb);
 475                 mwifiex_add_wmm_info_ie(priv, skb, 0);
 476                 break;
 477
 478         case WLAN_TDLS_SETUP_RESPONSE:
 479                 tf->category = WLAN_CATEGORY_TDLS;
 480                 tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
 481                 skb_put(skb, sizeof(tf->u.setup_resp));
 482                 tf->u.setup_resp.status_code = cpu_to_le16(status_code);
 483                 tf->u.setup_resp.dialog_token = dialog_token;
 484                 tf->u.setup_resp.capability = cpu_to_le16(capab);
 485                 ret = mwifiex_tdls_append_rates_ie(priv, skb);
 486                 if (ret) {
 487                         dev_kfree_skb_any(skb);
 488                         return ret;
 489                 }
 490
 491                 pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 492                 *pos++ = WLAN_EID_HT_CAPABILITY;
 493                 *pos++ = sizeof(struct ieee80211_ht_cap);
 494                 ht_cap = (void *)pos;
 495                 radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
 496                 ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
 497                 if (ret) {
 498                         dev_kfree_skb_any(skb);
 499                         return ret;
 500                 }
 501
 502                 if (priv->adapter->is_hw_11ac_capable) {
 503                         ret = mwifiex_tdls_add_vht_capab(priv, skb);
 504                         if (ret) {
 505                                 dev_kfree_skb_any(skb);
 506                                 return ret;
 507                         }
 508                         mwifiex_tdls_add_aid(priv, skb);
 509                 }
 510
 511                 mwifiex_tdls_add_ext_capab(priv, skb);
 512                 mwifiex_tdls_add_qos_capab(skb);
 513                 mwifiex_add_wmm_info_ie(priv, skb, 0);
 514                 break;
 515
 516         case WLAN_TDLS_SETUP_CONFIRM:
 517                 tf->category = WLAN_CATEGORY_TDLS;
 518                 tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
 519                 skb_put(skb, sizeof(tf->u.setup_cfm));
 520                 tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
 521                 tf->u.setup_cfm.dialog_token = dialog_token;
 522
 523                 mwifiex_tdls_add_wmm_param_ie(priv, skb);
 524                 if (priv->adapter->is_hw_11ac_capable) {
 525                         ret = mwifiex_tdls_add_vht_oper(priv, peer, skb);
 526                         if (ret) {
 527                                 dev_kfree_skb_any(skb);
 528                                 return ret;
 529                         }
 530                         ret = mwifiex_tdls_add_ht_oper(priv, peer, 1, skb);
 531                         if (ret) {
 532                                 dev_kfree_skb_any(skb);
 533                                 return ret;
 534                         }
 535                 } else {
 536                         ret = mwifiex_tdls_add_ht_oper(priv, peer, 0, skb);
 537                         if (ret) {
 538                                 dev_kfree_skb_any(skb);
 539                                 return ret;
 540                         }
 541                 }
 542                 break;
 543
 544         case WLAN_TDLS_TEARDOWN:
 545                 tf->category = WLAN_CATEGORY_TDLS;
 546                 tf->action_code = WLAN_TDLS_TEARDOWN;
 547                 skb_put(skb, sizeof(tf->u.teardown));
 548                 tf->u.teardown.reason_code = cpu_to_le16(status_code);
 549                 break;
 550
 551         case WLAN_TDLS_DISCOVERY_REQUEST:
 552                 tf->category = WLAN_CATEGORY_TDLS;
 553                 tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
 554                 skb_put(skb, sizeof(tf->u.discover_req));
 555                 tf->u.discover_req.dialog_token = dialog_token;
 556                 break;
 557         default:
 558                 mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS frame type.\n");
 559                 return -EINVAL;
 560         }
 561
 562         return 0;
 563 }
 564
 565 static void
 566 mwifiex_tdls_add_link_ie(struct sk_buff *skb, const u8 *src_addr,
 567                          const u8 *peer, const u8 *bssid)
 568 {
 569         struct ieee80211_tdls_lnkie *lnkid;
 570
 571         lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
 572         lnkid->ie_type = WLAN_EID_LINK_ID;
 573         lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) -
 574                         sizeof(struct ieee_types_header);
 575
 576         memcpy(lnkid->bssid, bssid, ETH_ALEN);
 577         memcpy(lnkid->init_sta, src_addr, ETH_ALEN);
 578         memcpy(lnkid->resp_sta, peer, ETH_ALEN);
 579 }
 580
 581 int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv, const u8 *peer,
 582                                  u8 action_code, u8 dialog_token,
 583                                  u16 status_code, const u8 *extra_ies,
 584                                  size_t extra_ies_len)
 585 {
 586         struct sk_buff *skb;
 587         struct mwifiex_txinfo *tx_info;
 588         int ret;
 589         u16 skb_len;
 590
 591         skb_len = MWIFIEX_MIN_DATA_HEADER_LEN +
 592                   max(sizeof(struct ieee80211_mgmt),
 593                       sizeof(struct ieee80211_tdls_data)) +
 594                   MWIFIEX_MGMT_FRAME_HEADER_SIZE +
 595                   MWIFIEX_SUPPORTED_RATES +
 596                   3 + /* Qos Info */
 597                   sizeof(struct ieee_types_extcap) +
 598                   sizeof(struct ieee80211_ht_cap) +
 599                   sizeof(struct ieee_types_bss_co_2040) +
 600                   sizeof(struct ieee80211_ht_operation) +
 601                   sizeof(struct ieee80211_tdls_lnkie) +
 602                   sizeof(struct ieee80211_wmm_param_ie) +
 603                   extra_ies_len;
 604
 605         if (priv->adapter->is_hw_11ac_capable)
 606                 skb_len += sizeof(struct ieee_types_vht_cap) +
 607                            sizeof(struct ieee_types_vht_oper) +
 608                            sizeof(struct ieee_types_aid);
 609
 610         skb = dev_alloc_skb(skb_len);
 611         if (!skb) {
 612                 mwifiex_dbg(priv->adapter, ERROR,
 613                             "allocate skb failed for management frame\n");
 614                 return -ENOMEM;
 615         }
 616         skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
 617
 618         switch (action_code) {
 619         case WLAN_TDLS_SETUP_REQUEST:
 620         case WLAN_TDLS_SETUP_CONFIRM:
 621         case WLAN_TDLS_TEARDOWN:
 622         case WLAN_TDLS_DISCOVERY_REQUEST:
 623                 ret = mwifiex_prep_tdls_encap_data(priv, peer, action_code,
 624                                                    dialog_token, status_code,
 625                                                    skb);
 626                 if (ret) {
 627                         dev_kfree_skb_any(skb);
 628                         return ret;
 629                 }
 630                 if (extra_ies_len)
 631                         memcpy(skb_put(skb, extra_ies_len), extra_ies,
 632                                extra_ies_len);
 633                 mwifiex_tdls_add_link_ie(skb, priv->curr_addr, peer,
 634                                          priv->cfg_bssid);
 635                 break;
 636         case WLAN_TDLS_SETUP_RESPONSE:
 637                 ret = mwifiex_prep_tdls_encap_data(priv, peer, action_code,
 638                                                    dialog_token, status_code,
 639                                                    skb);
 640                 if (ret) {
 641                         dev_kfree_skb_any(skb);
 642                         return ret;
 643                 }
 644                 if (extra_ies_len)
 645                         memcpy(skb_put(skb, extra_ies_len), extra_ies,
 646                                extra_ies_len);
 647                 mwifiex_tdls_add_link_ie(skb, peer, priv->curr_addr,
 648                                          priv->cfg_bssid);
 649                 break;
 650         }
 651
 652         switch (action_code) {
 653         case WLAN_TDLS_SETUP_REQUEST:
 654         case WLAN_TDLS_SETUP_RESPONSE:
 655                 skb->priority = MWIFIEX_PRIO_BK;
 656                 break;
 657         default:
 658                 skb->priority = MWIFIEX_PRIO_VI;
 659                 break;
 660         }
 661
 662         tx_info = MWIFIEX_SKB_TXCB(skb);
 663         memset(tx_info, 0, sizeof(*tx_info));
 664         tx_info->bss_num = priv->bss_num;
 665         tx_info->bss_type = priv->bss_type;
 666
 667         __net_timestamp(skb);
 668         mwifiex_queue_tx_pkt(priv, skb);
 669
 670         return 0;
 671 }
 672
 673 static int
 674 mwifiex_construct_tdls_action_frame(struct mwifiex_private *priv,
 675                                     const u8 *peer,
 676                                     u8 action_code, u8 dialog_token,
 677                                     u16 status_code, struct sk_buff *skb)
 678 {
 679         struct ieee80211_mgmt *mgmt;
 680         u8 bc_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 681         int ret;
 682         u16 capab;
 683         struct ieee80211_ht_cap *ht_cap;
 684         u8 radio, *pos;
 685
 686         capab = priv->curr_bss_params.bss_descriptor.cap_info_bitmap;
 687
 688         mgmt = (void *)skb_put(skb, offsetof(struct ieee80211_mgmt, u));
 689
 690         memset(mgmt, 0, 24);
 691         memcpy(mgmt->da, peer, ETH_ALEN);
 692         memcpy(mgmt->sa, priv->curr_addr, ETH_ALEN);
 693         memcpy(mgmt->bssid, priv->cfg_bssid, ETH_ALEN);
 694         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 695                                           IEEE80211_STYPE_ACTION);
 696
 697         /* add address 4 */
 698         pos = skb_put(skb, ETH_ALEN);
 699
 700         switch (action_code) {
 701         case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 702                 skb_put(skb, sizeof(mgmt->u.action.u.tdls_discover_resp) + 1);
 703                 mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
 704                 mgmt->u.action.u.tdls_discover_resp.action_code =
 705                                               WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
 706                 mgmt->u.action.u.tdls_discover_resp.dialog_token =
 707                                                                    dialog_token;
 708                 mgmt->u.action.u.tdls_discover_resp.capability =
 709                                                              cpu_to_le16(capab);
 710                 /* move back for addr4 */
 711                 memmove(pos + ETH_ALEN, &mgmt->u.action.category,
 712                         sizeof(mgmt->u.action.u.tdls_discover_resp));
 713                 /* init address 4 */
 714                 memcpy(pos, bc_addr, ETH_ALEN);
 715
 716                 ret = mwifiex_tdls_append_rates_ie(priv, skb);
 717                 if (ret) {
 718                         dev_kfree_skb_any(skb);
 719                         return ret;
 720                 }
 721
 722                 pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 723                 *pos++ = WLAN_EID_HT_CAPABILITY;
 724                 *pos++ = sizeof(struct ieee80211_ht_cap);
 725                 ht_cap = (void *)pos;
 726                 radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
 727                 ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
 728                 if (ret) {
 729                         dev_kfree_skb_any(skb);
 730                         return ret;
 731                 }
 732
 733                 if (priv->adapter->is_hw_11ac_capable) {
 734                         ret = mwifiex_tdls_add_vht_capab(priv, skb);
 735                         if (ret) {
 736                                 dev_kfree_skb_any(skb);
 737                                 return ret;
 738                         }
 739                         mwifiex_tdls_add_aid(priv, skb);
 740                 }
 741
 742                 mwifiex_tdls_add_ext_capab(priv, skb);
 743                 mwifiex_tdls_add_qos_capab(skb);
 744                 break;
 745         default:
 746                 mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS action frame type\n");
 747                 return -EINVAL;
 748         }
 749
 750         return 0;
 751 }
 752
 753 int mwifiex_send_tdls_action_frame(struct mwifiex_private *priv, const u8 *peer,
 754                                    u8 action_code, u8 dialog_token,
 755                                    u16 status_code, const u8 *extra_ies,
 756                                    size_t extra_ies_len)
 757 {
 758         struct sk_buff *skb;
 759         struct mwifiex_txinfo *tx_info;
 760         u8 *pos;
 761         u32 pkt_type, tx_control;
 762         u16 pkt_len, skb_len;
 763
 764         skb_len = MWIFIEX_MIN_DATA_HEADER_LEN +
 765                   max(sizeof(struct ieee80211_mgmt),
 766                       sizeof(struct ieee80211_tdls_data)) +
 767                   MWIFIEX_MGMT_FRAME_HEADER_SIZE +
 768                   MWIFIEX_SUPPORTED_RATES +
 769                   sizeof(struct ieee_types_extcap) +
 770                   sizeof(struct ieee80211_ht_cap) +
 771                   sizeof(struct ieee_types_bss_co_2040) +
 772                   sizeof(struct ieee80211_ht_operation) +
 773                   sizeof(struct ieee80211_tdls_lnkie) +
 774                   extra_ies_len +
 775                   3 + /* Qos Info */
 776                   ETH_ALEN; /* Address4 */
 777
 778         if (priv->adapter->is_hw_11ac_capable)
 779                 skb_len += sizeof(struct ieee_types_vht_cap) +
 780                            sizeof(struct ieee_types_vht_oper) +
 781                            sizeof(struct ieee_types_aid);
 782
 783         skb = dev_alloc_skb(skb_len);
 784         if (!skb) {
 785                 mwifiex_dbg(priv->adapter, ERROR,
 786                             "allocate skb failed for management frame\n");
 787                 return -ENOMEM;
 788         }
 789
 790         skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
 791
 792         pkt_type = PKT_TYPE_MGMT;
 793         tx_control = 0;
 794         pos = skb_put(skb, MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(pkt_len));
 795         memset(pos, 0, MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(pkt_len));
 796         memcpy(pos, &pkt_type, sizeof(pkt_type));
 797         memcpy(pos + sizeof(pkt_type), &tx_control, sizeof(tx_control));
 798
 799         if (mwifiex_construct_tdls_action_frame(priv, peer, action_code,
 800                                                 dialog_token, status_code,
 801                                                 skb)) {
 802                 dev_kfree_skb_any(skb);
 803                 return -EINVAL;
 804         }
 805
 806         if (extra_ies_len)
 807                 memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
 808
 809         /* the TDLS link IE is always added last we are the responder */
 810
 811         mwifiex_tdls_add_link_ie(skb, peer, priv->curr_addr,
 812                                  priv->cfg_bssid);
 813
 814         skb->priority = MWIFIEX_PRIO_VI;
 815
 816         tx_info = MWIFIEX_SKB_TXCB(skb);
 817         memset(tx_info, 0, sizeof(*tx_info));
 818         tx_info->bss_num = priv->bss_num;
 819         tx_info->bss_type = priv->bss_type;
 820         tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
 821
 822         pkt_len = skb->len - MWIFIEX_MGMT_FRAME_HEADER_SIZE - sizeof(pkt_len);
 823         memcpy(skb->data + MWIFIEX_MGMT_FRAME_HEADER_SIZE, &pkt_len,
 824                sizeof(pkt_len));
 825         __net_timestamp(skb);
 826         mwifiex_queue_tx_pkt(priv, skb);
 827
 828         return 0;
 829 }
 830
 831 /* This function process tdls action frame from peer.
 832  * Peer capabilities are stored into station node structure.
 833  */
 834 void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
 835                                        u8 *buf, int len)
 836 {
 837         struct mwifiex_sta_node *sta_ptr;
 838         u8 *peer, *pos, *end;
 839         u8 i, action, basic;
 840         __le16 cap = 0;
 841         int ie_len = 0;
 842
 843         if (len < (sizeof(struct ethhdr) + 3))
 844                 return;
 845         if (*(buf + sizeof(struct ethhdr)) != WLAN_TDLS_SNAP_RFTYPE)
 846                 return;
 847         if (*(buf + sizeof(struct ethhdr) + 1) != WLAN_CATEGORY_TDLS)
 848                 return;
 849
 850         peer = buf + ETH_ALEN;
 851         action = *(buf + sizeof(struct ethhdr) + 2);
 852         mwifiex_dbg(priv->adapter, DATA,
 853                     "rx:tdls action: peer=%pM, action=%d\n", peer, action);
 854
 855         switch (action) {
 856         case WLAN_TDLS_SETUP_REQUEST:
 857                 if (len < (sizeof(struct ethhdr) + TDLS_REQ_FIX_LEN))
 858                         return;
 859
 860                 pos = buf + sizeof(struct ethhdr) + 4;
 861                 /* payload 1+ category 1 + action 1 + dialog 1 */
 862                 cap = cpu_to_le16(*(u16 *)pos);
 863                 ie_len = len - sizeof(struct ethhdr) - TDLS_REQ_FIX_LEN;
 864                 pos += 2;
 865                 break;
 866
 867         case WLAN_TDLS_SETUP_RESPONSE:
 868                 if (len < (sizeof(struct ethhdr) + TDLS_RESP_FIX_LEN))
 869                         return;
 870                 /* payload 1+ category 1 + action 1 + dialog 1 + status code 2*/
 871                 pos = buf + sizeof(struct ethhdr) + 6;
 872                 cap = cpu_to_le16(*(u16 *)pos);
 873                 ie_len = len - sizeof(struct ethhdr) - TDLS_RESP_FIX_LEN;
 874                 pos += 2;
 875                 break;
 876
 877         case WLAN_TDLS_SETUP_CONFIRM:
 878                 if (len < (sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN))
 879                         return;
 880                 pos = buf + sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN;
 881                 ie_len = len - sizeof(struct ethhdr) - TDLS_CONFIRM_FIX_LEN;
 882                 break;
 883         default:
 884                 mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS frame type.\n");
 885                 return;
 886         }
 887
 888         sta_ptr = mwifiex_add_sta_entry(priv, peer);
 889         if (!sta_ptr)
 890                 return;
 891
 892         sta_ptr->tdls_cap.capab = cap;
 893
 894         for (end = pos + ie_len; pos + 1 < end; pos += 2 + pos[1]) {
 895                 if (pos + 2 + pos[1] > end)
 896                         break;
 897
 898                 switch (*pos) {
 899                 case WLAN_EID_SUPP_RATES:
 900                         sta_ptr->tdls_cap.rates_len = pos[1];
 901                         for (i = 0; i < pos[1]; i++)
 902                                 sta_ptr->tdls_cap.rates[i] = pos[i + 2];
 903                         break;
 904
 905                 case WLAN_EID_EXT_SUPP_RATES:
 906                         basic = sta_ptr->tdls_cap.rates_len;
 907                         for (i = 0; i < pos[1]; i++)
 908                                 sta_ptr->tdls_cap.rates[basic + i] = pos[i + 2];
 909                         sta_ptr->tdls_cap.rates_len += pos[1];
 910                         break;
 911                 case WLAN_EID_HT_CAPABILITY:
 912                         memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos,
 913                                sizeof(struct ieee80211_ht_cap));
 914                         sta_ptr->is_11n_enabled = 1;
 915                         break;
 916                 case WLAN_EID_HT_OPERATION:
 917                         memcpy(&sta_ptr->tdls_cap.ht_oper, pos,
 918                                sizeof(struct ieee80211_ht_operation));
 919                         break;
 920                 case WLAN_EID_BSS_COEX_2040:
 921                         sta_ptr->tdls_cap.coex_2040 = pos[2];
 922                         break;
 923                 case WLAN_EID_EXT_CAPABILITY:
 924                         memcpy((u8 *)&sta_ptr->tdls_cap.extcap, pos,
 925                                sizeof(struct ieee_types_header) +
 926                                min_t(u8, pos[1], 8));
 927                         break;
 928                 case WLAN_EID_RSN:
 929                         memcpy((u8 *)&sta_ptr->tdls_cap.rsn_ie, pos,
 930                                sizeof(struct ieee_types_header) +
 931                                min_t(u8, pos[1], IEEE_MAX_IE_SIZE -
 932                                      sizeof(struct ieee_types_header)));
 933                         break;
 934                 case WLAN_EID_QOS_CAPA:
 935                         sta_ptr->tdls_cap.qos_info = pos[2];
 936                         break;
 937                 case WLAN_EID_VHT_OPERATION:
 938                         if (priv->adapter->is_hw_11ac_capable)
 939                                 memcpy(&sta_ptr->tdls_cap.vhtoper, pos,
 940                                        sizeof(struct ieee80211_vht_operation));
 941                         break;
 942                 case WLAN_EID_VHT_CAPABILITY:
 943                         if (priv->adapter->is_hw_11ac_capable) {
 944                                 memcpy((u8 *)&sta_ptr->tdls_cap.vhtcap, pos,
 945                                        sizeof(struct ieee80211_vht_cap));
 946                                 sta_ptr->is_11ac_enabled = 1;
 947                         }
 948                         break;
 949                 case WLAN_EID_AID:
 950                         if (priv->adapter->is_hw_11ac_capable)
 951                                 sta_ptr->tdls_cap.aid =
 952                                               le16_to_cpu(*(__le16 *)(pos + 2));
 953                 default:
 954                         break;
 955                 }
 956         }
 957
 958         return;
 959 }
 960
 961 static int
 962 mwifiex_tdls_process_config_link(struct mwifiex_private *priv, const u8 *peer)
 963 {
 964         struct mwifiex_sta_node *sta_ptr;
 965         struct mwifiex_ds_tdls_oper tdls_oper;
 966
 967         memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
 968         sta_ptr = mwifiex_get_sta_entry(priv, peer);
 969
 970         if (!sta_ptr || sta_ptr->tdls_status == TDLS_SETUP_FAILURE) {
 971                 mwifiex_dbg(priv->adapter, ERROR,
 972                             "link absent for peer %pM; cannot config\n", peer);
 973                 return -EINVAL;
 974         }
 975
 976         memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
 977         tdls_oper.tdls_action = MWIFIEX_TDLS_CONFIG_LINK;
 978         return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
 979                                 HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
 980 }
 981
 982 static int
 983 mwifiex_tdls_process_create_link(struct mwifiex_private *priv, const u8 *peer)
 984 {
 985         struct mwifiex_sta_node *sta_ptr;
 986         struct mwifiex_ds_tdls_oper tdls_oper;
 987
 988         memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
 989         sta_ptr = mwifiex_get_sta_entry(priv, peer);
 990
 991         if (sta_ptr && sta_ptr->tdls_status == TDLS_SETUP_INPROGRESS) {
 992                 mwifiex_dbg(priv->adapter, WARN,
 993                             "Setup already in progress for peer %pM\n", peer);
 994                 return 0;
 995         }
 996
 997         sta_ptr = mwifiex_add_sta_entry(priv, peer);
 998         if (!sta_ptr)
 999                 return -ENOMEM;
1000
1001         sta_ptr->tdls_status = TDLS_SETUP_INPROGRESS;
1002         mwifiex_hold_tdls_packets(priv, peer);
1003         memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
1004         tdls_oper.tdls_action = MWIFIEX_TDLS_CREATE_LINK;
1005         return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1006                                 HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
1007 }
1008
1009 static int
1010 mwifiex_tdls_process_disable_link(struct mwifiex_private *priv, const u8 *peer)
1011 {
1012         struct mwifiex_sta_node *sta_ptr;
1013         struct mwifiex_ds_tdls_oper tdls_oper;
1014         unsigned long flags;
1015
1016         memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1017         sta_ptr = mwifiex_get_sta_entry(priv, peer);
1018
1019         if (sta_ptr) {
1020                 if (sta_ptr->is_11n_enabled) {
1021                         mwifiex_11n_cleanup_reorder_tbl(priv);
1022                         spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
1023                                           flags);
1024                         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1025                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1026                                                flags);
1027                 }
1028                 mwifiex_del_sta_entry(priv, peer);
1029         }
1030
1031         mwifiex_restore_tdls_packets(priv, peer, TDLS_LINK_TEARDOWN);
1032         mwifiex_auto_tdls_update_peer_status(priv, peer, TDLS_NOT_SETUP);
1033         memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
1034         tdls_oper.tdls_action = MWIFIEX_TDLS_DISABLE_LINK;
1035         return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1036                                 HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
1037 }
1038
1039 static int
1040 mwifiex_tdls_process_enable_link(struct mwifiex_private *priv, const u8 *peer)
1041 {
1042         struct mwifiex_sta_node *sta_ptr;
1043         struct ieee80211_mcs_info mcs;
1044         unsigned long flags;
1045         int i;
1046
1047         sta_ptr = mwifiex_get_sta_entry(priv, peer);
1048
1049         if (sta_ptr && (sta_ptr->tdls_status != TDLS_SETUP_FAILURE)) {
1050                 mwifiex_dbg(priv->adapter, MSG,
1051                             "tdls: enable link %pM success\n", peer);
1052
1053                 sta_ptr->tdls_status = TDLS_SETUP_COMPLETE;
1054
1055                 mcs = sta_ptr->tdls_cap.ht_capb.mcs;
1056                 if (mcs.rx_mask[0] != 0xff)
1057                         sta_ptr->is_11n_enabled = true;
1058                 if (sta_ptr->is_11n_enabled) {
1059                         if (le16_to_cpu(sta_ptr->tdls_cap.ht_capb.cap_info) &
1060                             IEEE80211_HT_CAP_MAX_AMSDU)
1061                                 sta_ptr->max_amsdu =
1062                                         MWIFIEX_TX_DATA_BUF_SIZE_8K;
1063                         else
1064                                 sta_ptr->max_amsdu =
1065                                         MWIFIEX_TX_DATA_BUF_SIZE_4K;
1066
1067                         for (i = 0; i < MAX_NUM_TID; i++)
1068                                 sta_ptr->ampdu_sta[i] =
1069                                               priv->aggr_prio_tbl[i].ampdu_user;
1070                 } else {
1071                         for (i = 0; i < MAX_NUM_TID; i++)
1072                                 sta_ptr->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
1073                 }
1074
1075                 memset(sta_ptr->rx_seq, 0xff, sizeof(sta_ptr->rx_seq));
1076                 mwifiex_restore_tdls_packets(priv, peer, TDLS_SETUP_COMPLETE);
1077                 mwifiex_auto_tdls_update_peer_status(priv, peer,
1078                                                      TDLS_SETUP_COMPLETE);
1079         } else {
1080                 mwifiex_dbg(priv->adapter, ERROR,
1081                             "tdls: enable link %pM failed\n", peer);
1082                 if (sta_ptr) {
1083                         mwifiex_11n_cleanup_reorder_tbl(priv);
1084                         spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
1085                                           flags);
1086                         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1087                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1088                                                flags);
1089                         mwifiex_del_sta_entry(priv, peer);
1090                 }
1091                 mwifiex_restore_tdls_packets(priv, peer, TDLS_LINK_TEARDOWN);
1092                 mwifiex_auto_tdls_update_peer_status(priv, peer,
1093                                                      TDLS_NOT_SETUP);
1094
1095                 return -1;
1096         }
1097
1098         return 0;
1099 }
1100
1101 int mwifiex_tdls_oper(struct mwifiex_private *priv, const u8 *peer, u8 action)
1102 {
1103         switch (action) {
1104         case MWIFIEX_TDLS_ENABLE_LINK:
1105                 return mwifiex_tdls_process_enable_link(priv, peer);
1106         case MWIFIEX_TDLS_DISABLE_LINK:
1107                 return mwifiex_tdls_process_disable_link(priv, peer);
1108         case MWIFIEX_TDLS_CREATE_LINK:
1109                 return mwifiex_tdls_process_create_link(priv, peer);
1110         case MWIFIEX_TDLS_CONFIG_LINK:
1111                 return mwifiex_tdls_process_config_link(priv, peer);
1112         }
1113         return 0;
1114 }
1115
1116 int mwifiex_get_tdls_link_status(struct mwifiex_private *priv, const u8 *mac)
1117 {
1118         struct mwifiex_sta_node *sta_ptr;
1119
1120         sta_ptr = mwifiex_get_sta_entry(priv, mac);
1121         if (sta_ptr)
1122                 return sta_ptr->tdls_status;
1123
1124         return TDLS_NOT_SETUP;
1125 }
1126
1127 int mwifiex_get_tdls_list(struct mwifiex_private *priv,
1128                           struct tdls_peer_info *buf)
1129 {
1130         struct mwifiex_sta_node *sta_ptr;
1131         struct tdls_peer_info *peer = buf;
1132         int count = 0;
1133         unsigned long flags;
1134
1135         if (!ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
1136                 return 0;
1137
1138         /* make sure we are in station mode and connected */
1139         if (!(priv->bss_type == MWIFIEX_BSS_TYPE_STA && priv->media_connected))
1140                 return 0;
1141
1142         spin_lock_irqsave(&priv->sta_list_spinlock, flags);
1143         list_for_each_entry(sta_ptr, &priv->sta_list, list) {
1144                 if (sta_ptr->tdls_status == TDLS_SETUP_COMPLETE) {
1145                         ether_addr_copy(peer->peer_addr, sta_ptr->mac_addr);
1146                         peer++;
1147                         count++;
1148                         if (count >= MWIFIEX_MAX_TDLS_PEER_SUPPORTED)
1149                                 break;
1150                 }
1151         }
1152         spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
1153
1154         return count;
1155 }
1156
1157 void mwifiex_disable_all_tdls_links(struct mwifiex_private *priv)
1158 {
1159         struct mwifiex_sta_node *sta_ptr;
1160         struct mwifiex_ds_tdls_oper tdls_oper;
1161         unsigned long flags;
1162
1163         if (list_empty(&priv->sta_list))
1164                 return;
1165
1166         list_for_each_entry(sta_ptr, &priv->sta_list, list) {
1167                 memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1168
1169                 if (sta_ptr->is_11n_enabled) {
1170                         mwifiex_11n_cleanup_reorder_tbl(priv);
1171                         spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
1172                                           flags);
1173                         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1174                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1175                                                flags);
1176                 }
1177
1178                 mwifiex_restore_tdls_packets(priv, sta_ptr->mac_addr,
1179                                              TDLS_LINK_TEARDOWN);
1180                 memcpy(&tdls_oper.peer_mac, sta_ptr->mac_addr, ETH_ALEN);
1181                 tdls_oper.tdls_action = MWIFIEX_TDLS_DISABLE_LINK;
1182                 if (mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1183                                      HostCmd_ACT_GEN_SET, 0, &tdls_oper, false))
1184                         mwifiex_dbg(priv->adapter, ERROR,
1185                                     "Disable link failed for TDLS peer %pM",
1186                                     sta_ptr->mac_addr);
1187         }
1188
1189         mwifiex_del_all_sta_list(priv);
1190 }
1191
1192 int mwifiex_tdls_check_tx(struct mwifiex_private *priv, struct sk_buff *skb)
1193 {
1194         struct mwifiex_auto_tdls_peer *peer;
1195         unsigned long flags;
1196         u8 mac[ETH_ALEN];
1197
1198         ether_addr_copy(mac, skb->data);
1199
1200         spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1201         list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1202                 if (!memcmp(mac, peer->mac_addr, ETH_ALEN)) {
1203                         if (peer->rssi <= MWIFIEX_TDLS_RSSI_HIGH &&
1204                             peer->tdls_status == TDLS_NOT_SETUP &&
1205                             (peer->failure_count <
1206                              MWIFIEX_TDLS_MAX_FAIL_COUNT)) {
1207                                 peer->tdls_status = TDLS_SETUP_INPROGRESS;
1208                                 mwifiex_dbg(priv->adapter, INFO,
1209                                             "setup TDLS link, peer=%pM rssi=%d\n",
1210                                             peer->mac_addr, peer->rssi);
1211
1212                                 cfg80211_tdls_oper_request(priv->netdev,
1213                                                            peer->mac_addr,
1214                                                            NL80211_TDLS_SETUP,
1215                                                            0, GFP_ATOMIC);
1216                                 peer->do_setup = false;
1217                                 priv->check_tdls_tx = false;
1218                         } else if (peer->failure_count <
1219                                    MWIFIEX_TDLS_MAX_FAIL_COUNT &&
1220                                    peer->do_discover) {
1221                                 mwifiex_send_tdls_data_frame(priv,
1222                                                              peer->mac_addr,
1223                                                     WLAN_TDLS_DISCOVERY_REQUEST,
1224                                                              1, 0, NULL, 0);
1225                                 peer->do_discover = false;
1226                         }
1227                 }
1228         }
1229         spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1230
1231         return 0;
1232 }
1233
1234 void mwifiex_flush_auto_tdls_list(struct mwifiex_private *priv)
1235 {
1236         struct mwifiex_auto_tdls_peer *peer, *tmp_node;
1237         unsigned long flags;
1238
1239         spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1240         list_for_each_entry_safe(peer, tmp_node, &priv->auto_tdls_list, list) {
1241                 list_del(&peer->list);
1242                 kfree(peer);
1243         }
1244
1245         INIT_LIST_HEAD(&priv->auto_tdls_list);
1246         spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1247         priv->check_tdls_tx = false;
1248 }
1249
1250 void mwifiex_add_auto_tdls_peer(struct mwifiex_private *priv, const u8 *mac)
1251 {
1252         struct mwifiex_auto_tdls_peer *tdls_peer;
1253         unsigned long flags;
1254
1255         if (!priv->adapter->auto_tdls)
1256                 return;
1257
1258         spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1259         list_for_each_entry(tdls_peer, &priv->auto_tdls_list, list) {
1260                 if (!memcmp(tdls_peer->mac_addr, mac, ETH_ALEN)) {
1261                         tdls_peer->tdls_status = TDLS_SETUP_INPROGRESS;
1262                         tdls_peer->rssi_jiffies = jiffies;
1263                         spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1264                         return;
1265                 }
1266         }
1267
1268         /* create new TDLS peer */
1269         tdls_peer = kzalloc(sizeof(*tdls_peer), GFP_ATOMIC);
1270         if (tdls_peer) {
1271                 ether_addr_copy(tdls_peer->mac_addr, mac);
1272                 tdls_peer->tdls_status = TDLS_SETUP_INPROGRESS;
1273                 tdls_peer->rssi_jiffies = jiffies;
1274                 INIT_LIST_HEAD(&tdls_peer->list);
1275                 list_add_tail(&tdls_peer->list, &priv->auto_tdls_list);
1276                 mwifiex_dbg(priv->adapter, INFO,
1277                             "Add auto TDLS peer= %pM to list\n", mac);
1278         }
1279
1280         spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1281 }
1282
1283 void mwifiex_auto_tdls_update_peer_status(struct mwifiex_private *priv,
1284                                           const u8 *mac, u8 link_status)
1285 {
1286         struct mwifiex_auto_tdls_peer *peer;
1287         unsigned long flags;
1288
1289         if (!priv->adapter->auto_tdls)
1290                 return;
1291
1292         spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1293         list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1294                 if (!memcmp(peer->mac_addr, mac, ETH_ALEN)) {
1295                         if ((link_status == TDLS_NOT_SETUP) &&
1296                             (peer->tdls_status == TDLS_SETUP_INPROGRESS))
1297                                 peer->failure_count++;
1298                         else if (link_status == TDLS_SETUP_COMPLETE)
1299                                 peer->failure_count = 0;
1300
1301                         peer->tdls_status = link_status;
1302                         break;
1303                 }
1304         }
1305         spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1306 }
1307
1308 void mwifiex_auto_tdls_update_peer_signal(struct mwifiex_private *priv,
1309                                           u8 *mac, s8 snr, s8 nflr)
1310 {
1311         struct mwifiex_auto_tdls_peer *peer;
1312         unsigned long flags;
1313
1314         if (!priv->adapter->auto_tdls)
1315                 return;
1316
1317         spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1318         list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1319                 if (!memcmp(peer->mac_addr, mac, ETH_ALEN)) {
1320                         peer->rssi = nflr - snr;
1321                         peer->rssi_jiffies = jiffies;
1322                         break;
1323                 }
1324         }
1325         spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1326 }
1327
1328 void mwifiex_check_auto_tdls(unsigned long context)
1329 {
1330         struct mwifiex_private *priv = (struct mwifiex_private *)context;
1331         struct mwifiex_auto_tdls_peer *tdls_peer;
1332         unsigned long flags;
1333         u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;
1334
1335         if (WARN_ON_ONCE(!priv || !priv->adapter)) {
1336                 pr_err("mwifiex: %s: adapter or private structure is NULL\n",
1337                        __func__);
1338                 return;
1339         }
1340
1341         if (unlikely(!priv->adapter->auto_tdls))
1342                 return;
1343
1344         if (!priv->auto_tdls_timer_active) {
1345                 mwifiex_dbg(priv->adapter, INFO,
1346                             "auto TDLS timer inactive; return");
1347                 return;
1348         }
1349
1350         priv->check_tdls_tx = false;
1351
1352         if (list_empty(&priv->auto_tdls_list)) {
1353                 mod_timer(&priv->auto_tdls_timer,
1354                           jiffies +
1355                           msecs_to_jiffies(MWIFIEX_TIMER_10S));
1356                 return;
1357         }
1358
1359         spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1360         list_for_each_entry(tdls_peer, &priv->auto_tdls_list, list) {
1361                 if ((jiffies - tdls_peer->rssi_jiffies) >
1362                     (MWIFIEX_AUTO_TDLS_IDLE_TIME * HZ)) {
1363                         tdls_peer->rssi = 0;
1364                         tdls_peer->do_discover = true;
1365                         priv->check_tdls_tx = true;
1366                 }
1367
1368                 if (((tdls_peer->rssi >= MWIFIEX_TDLS_RSSI_LOW) ||
1369                      !tdls_peer->rssi) &&
1370                     tdls_peer->tdls_status == TDLS_SETUP_COMPLETE) {
1371                         tdls_peer->tdls_status = TDLS_LINK_TEARDOWN;
1372                         mwifiex_dbg(priv->adapter, MSG,
1373                                     "teardown TDLS link,peer=%pM rssi=%d\n",
1374                                     tdls_peer->mac_addr, -tdls_peer->rssi);
1375                         tdls_peer->do_discover = true;
1376                         priv->check_tdls_tx = true;
1377                         cfg80211_tdls_oper_request(priv->netdev,
1378                                                    tdls_peer->mac_addr,
1379                                                    NL80211_TDLS_TEARDOWN,
1380                                                    reason, GFP_ATOMIC);
1381                 } else if (tdls_peer->rssi &&
1382                            tdls_peer->rssi <= MWIFIEX_TDLS_RSSI_HIGH &&
1383                            tdls_peer->tdls_status == TDLS_NOT_SETUP &&
1384                            tdls_peer->failure_count <
1385                            MWIFIEX_TDLS_MAX_FAIL_COUNT) {
1386                                 priv->check_tdls_tx = true;
1387                                 tdls_peer->do_setup = true;
1388                                 mwifiex_dbg(priv->adapter, INFO,
1389                                             "check TDLS with peer=%pM\t"
1390                                             "rssi=%d\n", tdls_peer->mac_addr,
1391                                             tdls_peer->rssi);
1392                 }
1393         }
1394         spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1395
1396         mod_timer(&priv->auto_tdls_timer,
1397                   jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
1398 }
1399
1400 void mwifiex_setup_auto_tdls_timer(struct mwifiex_private *priv)
1401 {
1402         setup_timer(&priv->auto_tdls_timer, mwifiex_check_auto_tdls,
1403                     (unsigned long)priv);
1404         priv->auto_tdls_timer_active = true;
1405         mod_timer(&priv->auto_tdls_timer,
1406                   jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
1407 }
1408
1409 void mwifiex_clean_auto_tdls(struct mwifiex_private *priv)
1410 {
1411         if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
1412             priv->adapter->auto_tdls &&
1413             priv->bss_type == MWIFIEX_BSS_TYPE_STA) {
1414                 priv->auto_tdls_timer_active = false;
1415                 del_timer(&priv->auto_tdls_timer);
1416                 mwifiex_flush_auto_tdls_list(priv);
1417         }
1418 }