drivers/net/wireless/mwifiex/scan.c

   1 /*
   2  * Marvell Wireless LAN device driver: scan ioctl and command handling
   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 "11n.h"
  26 #include "cfg80211.h"
  27
  28 /* The maximum number of channels the firmware can scan per command */
  29 #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN   14
  30
  31 #define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD       4
  32 #define MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD    15
  33 #define MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD   27
  34 #define MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD   35
  35
  36 /* Memory needed to store a max sized Channel List TLV for a firmware scan */
  37 #define CHAN_TLV_MAX_SIZE  (sizeof(struct mwifiex_ie_types_header)         \
  38                                 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN     \
  39                                 *sizeof(struct mwifiex_chan_scan_param_set)))
  40
  41 /* Memory needed to store supported rate */
  42 #define RATE_TLV_MAX_SIZE   (sizeof(struct mwifiex_ie_types_rates_param_set) \
  43                                 + HOSTCMD_SUPPORTED_RATES)
  44
  45 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware
  46         scan */
  47 #define WILDCARD_SSID_TLV_MAX_SIZE  \
  48         (MWIFIEX_MAX_SSID_LIST_LENGTH *                                 \
  49                 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params)   \
  50                         + IEEE80211_MAX_SSID_LEN))
  51
  52 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
  53 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config)        \
  54                                 + sizeof(struct mwifiex_ie_types_num_probes)   \
  55                                 + sizeof(struct mwifiex_ie_types_htcap)       \
  56                                 + CHAN_TLV_MAX_SIZE                 \
  57                                 + RATE_TLV_MAX_SIZE                 \
  58                                 + WILDCARD_SSID_TLV_MAX_SIZE)
  59
  60
  61 union mwifiex_scan_cmd_config_tlv {
  62         /* Scan configuration (variable length) */
  63         struct mwifiex_scan_cmd_config config;
  64         /* Max allocated block */
  65         u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
  66 };
  67
  68 enum cipher_suite {
  69         CIPHER_SUITE_TKIP,
  70         CIPHER_SUITE_CCMP,
  71         CIPHER_SUITE_MAX
  72 };
  73 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
  74         { 0x00, 0x50, 0xf2, 0x02 },     /* TKIP */
  75         { 0x00, 0x50, 0xf2, 0x04 },     /* AES  */
  76 };
  77 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
  78         { 0x00, 0x0f, 0xac, 0x02 },     /* TKIP */
  79         { 0x00, 0x0f, 0xac, 0x04 },     /* AES  */
  80 };
  81
  82 /*
  83  * This function parses a given IE for a given OUI.
  84  *
  85  * This is used to parse a WPA/RSN IE to find if it has
  86  * a given oui in PTK.
  87  */
  88 static u8
  89 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
  90 {
  91         u8 count;
  92
  93         count = iebody->ptk_cnt[0];
  94
  95         /* There could be multiple OUIs for PTK hence
  96            1) Take the length.
  97            2) Check all the OUIs for AES.
  98            3) If one of them is AES then pass success. */
  99         while (count) {
 100                 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
 101                         return MWIFIEX_OUI_PRESENT;
 102
 103                 --count;
 104                 if (count)
 105                         iebody = (struct ie_body *) ((u8 *) iebody +
 106                                                 sizeof(iebody->ptk_body));
 107         }
 108
 109         pr_debug("info: %s: OUI is not found in PTK\n", __func__);
 110         return MWIFIEX_OUI_NOT_PRESENT;
 111 }
 112
 113 /*
 114  * This function checks if a given OUI is present in a RSN IE.
 115  *
 116  * The function first checks if a RSN IE is present or not in the
 117  * BSS descriptor. It tries to locate the OUI only if such an IE is
 118  * present.
 119  */
 120 static u8
 121 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
 122 {
 123         u8 *oui;
 124         struct ie_body *iebody;
 125         u8 ret = MWIFIEX_OUI_NOT_PRESENT;
 126
 127         if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
 128                                         ieee_hdr.element_id == WLAN_EID_RSN))) {
 129                 iebody = (struct ie_body *)
 130                          (((u8 *) bss_desc->bcn_rsn_ie->data) +
 131                           RSN_GTK_OUI_OFFSET);
 132                 oui = &mwifiex_rsn_oui[cipher][0];
 133                 ret = mwifiex_search_oui_in_ie(iebody, oui);
 134                 if (ret)
 135                         return ret;
 136         }
 137         return ret;
 138 }
 139
 140 /*
 141  * This function checks if a given OUI is present in a WPA IE.
 142  *
 143  * The function first checks if a WPA IE is present or not in the
 144  * BSS descriptor. It tries to locate the OUI only if such an IE is
 145  * present.
 146  */
 147 static u8
 148 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
 149 {
 150         u8 *oui;
 151         struct ie_body *iebody;
 152         u8 ret = MWIFIEX_OUI_NOT_PRESENT;
 153
 154         if (((bss_desc->bcn_wpa_ie) &&
 155              ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
 156               WLAN_EID_VENDOR_SPECIFIC))) {
 157                 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
 158                 oui = &mwifiex_wpa_oui[cipher][0];
 159                 ret = mwifiex_search_oui_in_ie(iebody, oui);
 160                 if (ret)
 161                         return ret;
 162         }
 163         return ret;
 164 }
 165
 166 /*
 167  * This function compares two SSIDs and checks if they match.
 168  */
 169 s32
 170 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
 171 {
 172         if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
 173                 return -1;
 174         return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
 175 }
 176
 177 /*
 178  * This function checks if wapi is enabled in driver and scanned network is
 179  * compatible with it.
 180  */
 181 static bool
 182 mwifiex_is_bss_wapi(struct mwifiex_private *priv,
 183                     struct mwifiex_bssdescriptor *bss_desc)
 184 {
 185         if (priv->sec_info.wapi_enabled &&
 186             (bss_desc->bcn_wapi_ie &&
 187              ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
 188                         WLAN_EID_BSS_AC_ACCESS_DELAY))) {
 189                 return true;
 190         }
 191         return false;
 192 }
 193
 194 /*
 195  * This function checks if driver is configured with no security mode and
 196  * scanned network is compatible with it.
 197  */
 198 static bool
 199 mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
 200                       struct mwifiex_bssdescriptor *bss_desc)
 201 {
 202         if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 203             !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
 204                 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
 205                  WLAN_EID_VENDOR_SPECIFIC)) &&
 206             ((!bss_desc->bcn_rsn_ie) ||
 207                 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
 208                  WLAN_EID_RSN)) &&
 209             !priv->sec_info.encryption_mode && !bss_desc->privacy) {
 210                 return true;
 211         }
 212         return false;
 213 }
 214
 215 /*
 216  * This function checks if static WEP is enabled in driver and scanned network
 217  * is compatible with it.
 218  */
 219 static bool
 220 mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
 221                           struct mwifiex_bssdescriptor *bss_desc)
 222 {
 223         if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 224             !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
 225                 return true;
 226         }
 227         return false;
 228 }
 229
 230 /*
 231  * This function checks if wpa is enabled in driver and scanned network is
 232  * compatible with it.
 233  */
 234 static bool
 235 mwifiex_is_bss_wpa(struct mwifiex_private *priv,
 236                    struct mwifiex_bssdescriptor *bss_desc)
 237 {
 238         if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
 239             !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
 240             ((*(bss_desc->bcn_wpa_ie)).
 241              vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC))
 242            /*
 243             * Privacy bit may NOT be set in some APs like
 244             * LinkSys WRT54G && bss_desc->privacy
 245             */
 246          ) {
 247                 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
 248                         " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
 249                         "EncMode=%#x privacy=%#x\n", __func__,
 250                         (bss_desc->bcn_wpa_ie) ?
 251                         (*(bss_desc->bcn_wpa_ie)).
 252                         vend_hdr.element_id : 0,
 253                         (bss_desc->bcn_rsn_ie) ?
 254                         (*(bss_desc->bcn_rsn_ie)).
 255                         ieee_hdr.element_id : 0,
 256                         (priv->sec_info.wep_enabled) ? "e" : "d",
 257                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 258                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 259                         priv->sec_info.encryption_mode,
 260                         bss_desc->privacy);
 261                 return true;
 262         }
 263         return false;
 264 }
 265
 266 /*
 267  * This function checks if wpa2 is enabled in driver and scanned network is
 268  * compatible with it.
 269  */
 270 static bool
 271 mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
 272                     struct mwifiex_bssdescriptor *bss_desc)
 273 {
 274         if (!priv->sec_info.wep_enabled &&
 275             !priv->sec_info.wpa_enabled &&
 276             priv->sec_info.wpa2_enabled &&
 277             ((bss_desc->bcn_rsn_ie) &&
 278              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
 279                 /*
 280                  * Privacy bit may NOT be set in some APs like
 281                  * LinkSys WRT54G && bss_desc->privacy
 282                  */
 283                 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
 284                         " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
 285                         "EncMode=%#x privacy=%#x\n", __func__,
 286                         (bss_desc->bcn_wpa_ie) ?
 287                         (*(bss_desc->bcn_wpa_ie)).
 288                         vend_hdr.element_id : 0,
 289                         (bss_desc->bcn_rsn_ie) ?
 290                         (*(bss_desc->bcn_rsn_ie)).
 291                         ieee_hdr.element_id : 0,
 292                         (priv->sec_info.wep_enabled) ? "e" : "d",
 293                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 294                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 295                         priv->sec_info.encryption_mode,
 296                         bss_desc->privacy);
 297                 return true;
 298         }
 299         return false;
 300 }
 301
 302 /*
 303  * This function checks if adhoc AES is enabled in driver and scanned network is
 304  * compatible with it.
 305  */
 306 static bool
 307 mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
 308                          struct mwifiex_bssdescriptor *bss_desc)
 309 {
 310         if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 311             !priv->sec_info.wpa2_enabled &&
 312             ((!bss_desc->bcn_wpa_ie) ||
 313              ((*(bss_desc->bcn_wpa_ie)).
 314               vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
 315             ((!bss_desc->bcn_rsn_ie) ||
 316              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
 317             !priv->sec_info.encryption_mode && bss_desc->privacy) {
 318                 return true;
 319         }
 320         return false;
 321 }
 322
 323 /*
 324  * This function checks if dynamic WEP is enabled in driver and scanned network
 325  * is compatible with it.
 326  */
 327 static bool
 328 mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
 329                            struct mwifiex_bssdescriptor *bss_desc)
 330 {
 331         if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 332             !priv->sec_info.wpa2_enabled &&
 333             ((!bss_desc->bcn_wpa_ie) ||
 334              ((*(bss_desc->bcn_wpa_ie)).
 335               vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
 336             ((!bss_desc->bcn_rsn_ie) ||
 337              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
 338             priv->sec_info.encryption_mode && bss_desc->privacy) {
 339                 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
 340                         "WEP: wpa_ie=%#x wpa2_ie=%#x "
 341                         "EncMode=%#x privacy=%#x\n",
 342                         __func__,
 343                         (bss_desc->bcn_wpa_ie) ?
 344                         (*(bss_desc->bcn_wpa_ie)).
 345                         vend_hdr.element_id : 0,
 346                         (bss_desc->bcn_rsn_ie) ?
 347                         (*(bss_desc->bcn_rsn_ie)).
 348                         ieee_hdr.element_id : 0,
 349                         priv->sec_info.encryption_mode,
 350                         bss_desc->privacy);
 351                 return true;
 352         }
 353         return false;
 354 }
 355
 356 /*
 357  * This function checks if a scanned network is compatible with the driver
 358  * settings.
 359  *
 360  *   WEP     WPA    WPA2   ad-hoc encrypt                  Network
 361  * enabled enabled enabled  AES    mode   Privacy WPA WPA2 Compatible
 362  *    0       0       0      0     NONE      0     0   0   yes No security
 363  *    0       1       0      0      x        1x    1   x   yes WPA (disable
 364  *                                                         HT if no AES)
 365  *    0       0       1      0      x        1x    x   1   yes WPA2 (disable
 366  *                                                         HT if no AES)
 367  *    0       0       0      1     NONE      1     0   0   yes Ad-hoc AES
 368  *    1       0       0      0     NONE      1     0   0   yes Static WEP
 369  *                                                         (disable HT)
 370  *    0       0       0      0    !=NONE     1     0   0   yes Dynamic WEP
 371  *
 372  * Compatibility is not matched while roaming, except for mode.
 373  */
 374 static s32
 375 mwifiex_is_network_compatible(struct mwifiex_private *priv,
 376                               struct mwifiex_bssdescriptor *bss_desc, u32 mode)
 377 {
 378         struct mwifiex_adapter *adapter = priv->adapter;
 379
 380         bss_desc->disable_11n = false;
 381
 382         /* Don't check for compatibility if roaming */
 383         if (priv->media_connected &&
 384             (priv->bss_mode == NL80211_IFTYPE_STATION) &&
 385             (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
 386                 return 0;
 387
 388         if (priv->wps.session_enable) {
 389                 dev_dbg(adapter->dev,
 390                         "info: return success directly in WPS period\n");
 391                 return 0;
 392         }
 393
 394         if (bss_desc->chan_sw_ie_present) {
 395                 dev_err(adapter->dev,
 396                         "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
 397                 return -1;
 398         }
 399
 400         if (mwifiex_is_bss_wapi(priv, bss_desc)) {
 401                 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
 402                 return 0;
 403         }
 404
 405         if (bss_desc->bss_mode == mode) {
 406                 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
 407                         /* No security */
 408                         return 0;
 409                 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
 410                         /* Static WEP enabled */
 411                         dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
 412                         bss_desc->disable_11n = true;
 413                         return 0;
 414                 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
 415                         /* WPA enabled */
 416                         if (((priv->adapter->config_bands & BAND_GN ||
 417                               priv->adapter->config_bands & BAND_AN) &&
 418                              bss_desc->bcn_ht_cap) &&
 419                             !mwifiex_is_wpa_oui_present(bss_desc,
 420                                                          CIPHER_SUITE_CCMP)) {
 421
 422                                 if (mwifiex_is_wpa_oui_present
 423                                                 (bss_desc, CIPHER_SUITE_TKIP)) {
 424                                         dev_dbg(adapter->dev,
 425                                                 "info: Disable 11n if AES "
 426                                                 "is not supported by AP\n");
 427                                         bss_desc->disable_11n = true;
 428                                 } else {
 429                                         return -1;
 430                                 }
 431                         }
 432                         return 0;
 433                 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
 434                         /* WPA2 enabled */
 435                         if (((priv->adapter->config_bands & BAND_GN ||
 436                               priv->adapter->config_bands & BAND_AN) &&
 437                              bss_desc->bcn_ht_cap) &&
 438                             !mwifiex_is_rsn_oui_present(bss_desc,
 439                                                         CIPHER_SUITE_CCMP)) {
 440
 441                                 if (mwifiex_is_rsn_oui_present
 442                                                 (bss_desc, CIPHER_SUITE_TKIP)) {
 443                                         dev_dbg(adapter->dev,
 444                                                 "info: Disable 11n if AES "
 445                                                 "is not supported by AP\n");
 446                                         bss_desc->disable_11n = true;
 447                                 } else {
 448                                         return -1;
 449                                 }
 450                         }
 451                         return 0;
 452                 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
 453                         /* Ad-hoc AES enabled */
 454                         return 0;
 455                 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
 456                         /* Dynamic WEP enabled */
 457                         return 0;
 458                 }
 459
 460                 /* Security doesn't match */
 461                 dev_dbg(adapter->dev,
 462                         "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s "
 463                         "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__,
 464                         (bss_desc->bcn_wpa_ie) ?
 465                         (*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id : 0,
 466                         (bss_desc->bcn_rsn_ie) ?
 467                         (*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id : 0,
 468                         (priv->sec_info.wep_enabled) ? "e" : "d",
 469                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 470                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 471                         priv->sec_info.encryption_mode, bss_desc->privacy);
 472                 return -1;
 473         }
 474
 475         /* Mode doesn't match */
 476         return -1;
 477 }
 478
 479 /*
 480  * This function creates a channel list for the driver to scan, based
 481  * on region/band information.
 482  *
 483  * This routine is used for any scan that is not provided with a
 484  * specific channel list to scan.
 485  */
 486 static int
 487 mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
 488                                  const struct mwifiex_user_scan_cfg
 489                                                         *user_scan_in,
 490                                  struct mwifiex_chan_scan_param_set
 491                                                         *scan_chan_list,
 492                                  u8 filtered_scan)
 493 {
 494         enum ieee80211_band band;
 495         struct ieee80211_supported_band *sband;
 496         struct ieee80211_channel *ch;
 497         struct mwifiex_adapter *adapter = priv->adapter;
 498         int chan_idx = 0, i;
 499
 500         for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
 501
 502                 if (!priv->wdev->wiphy->bands[band])
 503                         continue;
 504
 505                 sband = priv->wdev->wiphy->bands[band];
 506
 507                 for (i = 0; (i < sband->n_channels) ; i++) {
 508                         ch = &sband->channels[i];
 509                         if (ch->flags & IEEE80211_CHAN_DISABLED)
 510                                 continue;
 511                         scan_chan_list[chan_idx].radio_type = band;
 512
 513                         if (user_scan_in &&
 514                             user_scan_in->chan_list[0].scan_time)
 515                                 scan_chan_list[chan_idx].max_scan_time =
 516                                         cpu_to_le16((u16) user_scan_in->
 517                                         chan_list[0].scan_time);
 518                         else if (ch->flags & IEEE80211_CHAN_NO_IR)
 519                                 scan_chan_list[chan_idx].max_scan_time =
 520                                         cpu_to_le16(adapter->passive_scan_time);
 521                         else
 522                                 scan_chan_list[chan_idx].max_scan_time =
 523                                         cpu_to_le16(adapter->active_scan_time);
 524
 525                         if (ch->flags & IEEE80211_CHAN_NO_IR)
 526                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 527                                         |= MWIFIEX_PASSIVE_SCAN;
 528                         else
 529                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 530                                         &= ~MWIFIEX_PASSIVE_SCAN;
 531                         scan_chan_list[chan_idx].chan_number =
 532                                                         (u32) ch->hw_value;
 533                         if (filtered_scan) {
 534                                 scan_chan_list[chan_idx].max_scan_time =
 535                                 cpu_to_le16(adapter->specific_scan_time);
 536                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 537                                         |= MWIFIEX_DISABLE_CHAN_FILT;
 538                         }
 539                         chan_idx++;
 540                 }
 541
 542         }
 543         return chan_idx;
 544 }
 545
 546 /* This function appends rate TLV to scan config command. */
 547 static int
 548 mwifiex_append_rate_tlv(struct mwifiex_private *priv,
 549                         struct mwifiex_scan_cmd_config *scan_cfg_out,
 550                         u8 radio)
 551 {
 552         struct mwifiex_ie_types_rates_param_set *rates_tlv;
 553         u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos;
 554         u32 rates_size;
 555
 556         memset(rates, 0, sizeof(rates));
 557
 558         tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len;
 559
 560         if (priv->scan_request)
 561                 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates,
 562                                                              radio);
 563         else
 564                 rates_size = mwifiex_get_supported_rates(priv, rates);
 565
 566         dev_dbg(priv->adapter->dev, "info: SCAN_CMD: Rates size = %d\n",
 567                 rates_size);
 568         rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos;
 569         rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
 570         rates_tlv->header.len = cpu_to_le16((u16) rates_size);
 571         memcpy(rates_tlv->rates, rates, rates_size);
 572         scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size;
 573
 574         return rates_size;
 575 }
 576
 577 /*
 578  * This function constructs and sends multiple scan config commands to
 579  * the firmware.
 580  *
 581  * Previous routines in the code flow have created a scan command configuration
 582  * with any requested TLVs.  This function splits the channel TLV into maximum
 583  * channels supported per scan lists and sends the portion of the channel TLV,
 584  * along with the other TLVs, to the firmware.
 585  */
 586 static int
 587 mwifiex_scan_channel_list(struct mwifiex_private *priv,
 588                           u32 max_chan_per_scan, u8 filtered_scan,
 589                           struct mwifiex_scan_cmd_config *scan_cfg_out,
 590                           struct mwifiex_ie_types_chan_list_param_set
 591                           *chan_tlv_out,
 592                           struct mwifiex_chan_scan_param_set *scan_chan_list)
 593 {
 594         struct mwifiex_adapter *adapter = priv->adapter;
 595         int ret = 0;
 596         struct mwifiex_chan_scan_param_set *tmp_chan_list;
 597         struct mwifiex_chan_scan_param_set *start_chan;
 598         struct cmd_ctrl_node *cmd_node, *tmp_node;
 599         unsigned long flags;
 600         u32 tlv_idx, rates_size, cmd_no;
 601         u32 total_scan_time;
 602         u32 done_early;
 603         u8 radio_type;
 604
 605         if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
 606                 dev_dbg(priv->adapter->dev,
 607                         "info: Scan: Null detect: %p, %p, %p\n",
 608                        scan_cfg_out, chan_tlv_out, scan_chan_list);
 609                 return -1;
 610         }
 611
 612         /* Check csa channel expiry before preparing scan list */
 613         mwifiex_11h_get_csa_closed_channel(priv);
 614
 615         chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 616
 617         /* Set the temp channel struct pointer to the start of the desired
 618            list */
 619         tmp_chan_list = scan_chan_list;
 620
 621         /* Loop through the desired channel list, sending a new firmware scan
 622            commands for each max_chan_per_scan channels (or for 1,6,11
 623            individually if configured accordingly) */
 624         while (tmp_chan_list->chan_number) {
 625
 626                 tlv_idx = 0;
 627                 total_scan_time = 0;
 628                 radio_type = 0;
 629                 chan_tlv_out->header.len = 0;
 630                 start_chan = tmp_chan_list;
 631                 done_early = false;
 632
 633                 /*
 634                  * Construct the Channel TLV for the scan command.  Continue to
 635                  * insert channel TLVs until:
 636                  *   - the tlv_idx hits the maximum configured per scan command
 637                  *   - the next channel to insert is 0 (end of desired channel
 638                  *     list)
 639                  *   - done_early is set (controlling individual scanning of
 640                  *     1,6,11)
 641                  */
 642                 while (tlv_idx < max_chan_per_scan &&
 643                        tmp_chan_list->chan_number && !done_early) {
 644
 645                         if (tmp_chan_list->chan_number == priv->csa_chan) {
 646                                 tmp_chan_list++;
 647                                 continue;
 648                         }
 649
 650                         radio_type = tmp_chan_list->radio_type;
 651                         dev_dbg(priv->adapter->dev,
 652                                 "info: Scan: Chan(%3d), Radio(%d),"
 653                                 " Mode(%d, %d), Dur(%d)\n",
 654                                 tmp_chan_list->chan_number,
 655                                 tmp_chan_list->radio_type,
 656                                 tmp_chan_list->chan_scan_mode_bitmap
 657                                 & MWIFIEX_PASSIVE_SCAN,
 658                                 (tmp_chan_list->chan_scan_mode_bitmap
 659                                  & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
 660                                 le16_to_cpu(tmp_chan_list->max_scan_time));
 661
 662                         /* Copy the current channel TLV to the command being
 663                            prepared */
 664                         memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
 665                                tmp_chan_list,
 666                                sizeof(chan_tlv_out->chan_scan_param));
 667
 668                         /* Increment the TLV header length by the size
 669                            appended */
 670                         le16_add_cpu(&chan_tlv_out->header.len,
 671                                      sizeof(chan_tlv_out->chan_scan_param));
 672
 673                         /*
 674                          * The tlv buffer length is set to the number of bytes
 675                          * of the between the channel tlv pointer and the start
 676                          * of the tlv buffer.  This compensates for any TLVs
 677                          * that were appended before the channel list.
 678                          */
 679                         scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
 680                                                         scan_cfg_out->tlv_buf);
 681
 682                         /* Add the size of the channel tlv header and the data
 683                            length */
 684                         scan_cfg_out->tlv_buf_len +=
 685                                 (sizeof(chan_tlv_out->header)
 686                                  + le16_to_cpu(chan_tlv_out->header.len));
 687
 688                         /* Increment the index to the channel tlv we are
 689                            constructing */
 690                         tlv_idx++;
 691
 692                         /* Count the total scan time per command */
 693                         total_scan_time +=
 694                                 le16_to_cpu(tmp_chan_list->max_scan_time);
 695
 696                         done_early = false;
 697
 698                         /* Stop the loop if the *current* channel is in the
 699                            1,6,11 set and we are not filtering on a BSSID
 700                            or SSID. */
 701                         if (!filtered_scan &&
 702                             (tmp_chan_list->chan_number == 1 ||
 703                              tmp_chan_list->chan_number == 6 ||
 704                              tmp_chan_list->chan_number == 11))
 705                                 done_early = true;
 706
 707                         /* Increment the tmp pointer to the next channel to
 708                            be scanned */
 709                         tmp_chan_list++;
 710
 711                         /* Stop the loop if the *next* channel is in the 1,6,11
 712                            set.  This will cause it to be the only channel
 713                            scanned on the next interation */
 714                         if (!filtered_scan &&
 715                             (tmp_chan_list->chan_number == 1 ||
 716                              tmp_chan_list->chan_number == 6 ||
 717                              tmp_chan_list->chan_number == 11))
 718                                 done_early = true;
 719                 }
 720
 721                 /* The total scan time should be less than scan command timeout
 722                    value */
 723                 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
 724                         dev_err(priv->adapter->dev, "total scan time %dms"
 725                                 " is over limit (%dms), scan skipped\n",
 726                                 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
 727                         ret = -1;
 728                         break;
 729                 }
 730
 731                 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out,
 732                                                      radio_type);
 733
 734                 priv->adapter->scan_channels = start_chan;
 735
 736                 /* Send the scan command to the firmware with the specified
 737                    cfg */
 738                 if (priv->adapter->ext_scan)
 739                         cmd_no = HostCmd_CMD_802_11_SCAN_EXT;
 740                 else
 741                         cmd_no = HostCmd_CMD_802_11_SCAN;
 742
 743                 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET,
 744                                        0, scan_cfg_out, false);
 745
 746                 /* rate IE is updated per scan command but same starting
 747                  * pointer is used each time so that rate IE from earlier
 748                  * scan_cfg_out->buf is overwritten with new one.
 749                  */
 750                 scan_cfg_out->tlv_buf_len -=
 751                             sizeof(struct mwifiex_ie_types_header) + rates_size;
 752
 753                 if (ret) {
 754                         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
 755                         list_for_each_entry_safe(cmd_node, tmp_node,
 756                                                  &adapter->scan_pending_q,
 757                                                  list) {
 758                                 list_del(&cmd_node->list);
 759                                 cmd_node->wait_q_enabled = false;
 760                                 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
 761                         }
 762                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
 763                                                flags);
 764                         break;
 765                 }
 766         }
 767
 768         if (ret)
 769                 return -1;
 770
 771         return 0;
 772 }
 773
 774 /*
 775  * This function constructs a scan command configuration structure to use
 776  * in scan commands.
 777  *
 778  * Application layer or other functions can invoke network scanning
 779  * with a scan configuration supplied in a user scan configuration structure.
 780  * This structure is used as the basis of one or many scan command configuration
 781  * commands that are sent to the command processing module and eventually to the
 782  * firmware.
 783  *
 784  * This function creates a scan command configuration structure  based on the
 785  * following user supplied parameters (if present):
 786  *      - SSID filter
 787  *      - BSSID filter
 788  *      - Number of Probes to be sent
 789  *      - Channel list
 790  *
 791  * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
 792  * If the number of probes is not set, adapter default setting is used.
 793  */
 794 static void
 795 mwifiex_config_scan(struct mwifiex_private *priv,
 796                     const struct mwifiex_user_scan_cfg *user_scan_in,
 797                     struct mwifiex_scan_cmd_config *scan_cfg_out,
 798                     struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
 799                     struct mwifiex_chan_scan_param_set *scan_chan_list,
 800                     u8 *max_chan_per_scan, u8 *filtered_scan,
 801                     u8 *scan_current_only)
 802 {
 803         struct mwifiex_adapter *adapter = priv->adapter;
 804         struct mwifiex_ie_types_num_probes *num_probes_tlv;
 805         struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
 806         struct mwifiex_ie_types_bssid_list *bssid_tlv;
 807         u8 *tlv_pos;
 808         u32 num_probes;
 809         u32 ssid_len;
 810         u32 chan_idx;
 811         u32 chan_num;
 812         u32 scan_type;
 813         u16 scan_dur;
 814         u8 channel;
 815         u8 radio_type;
 816         int i;
 817         u8 ssid_filter;
 818         struct mwifiex_ie_types_htcap *ht_cap;
 819
 820         /* The tlv_buf_len is calculated for each scan command.  The TLVs added
 821            in this routine will be preserved since the routine that sends the
 822            command will append channelTLVs at *chan_list_out.  The difference
 823            between the *chan_list_out and the tlv_buf start will be used to
 824            calculate the size of anything we add in this routine. */
 825         scan_cfg_out->tlv_buf_len = 0;
 826
 827         /* Running tlv pointer.  Assigned to chan_list_out at end of function
 828            so later routines know where channels can be added to the command
 829            buf */
 830         tlv_pos = scan_cfg_out->tlv_buf;
 831
 832         /* Initialize the scan as un-filtered; the flag is later set to TRUE
 833            below if a SSID or BSSID filter is sent in the command */
 834         *filtered_scan = false;
 835
 836         /* Initialize the scan as not being only on the current channel.  If
 837            the channel list is customized, only contains one channel, and is
 838            the active channel, this is set true and data flow is not halted. */
 839         *scan_current_only = false;
 840
 841         if (user_scan_in) {
 842
 843                 /* Default the ssid_filter flag to TRUE, set false under
 844                    certain wildcard conditions and qualified by the existence
 845                    of an SSID list before marking the scan as filtered */
 846                 ssid_filter = true;
 847
 848                 /* Set the BSS type scan filter, use Adapter setting if
 849                    unset */
 850                 scan_cfg_out->bss_mode =
 851                         (user_scan_in->bss_mode ? (u8) user_scan_in->
 852                          bss_mode : (u8) adapter->scan_mode);
 853
 854                 /* Set the number of probes to send, use Adapter setting
 855                    if unset */
 856                 num_probes =
 857                         (user_scan_in->num_probes ? user_scan_in->
 858                          num_probes : adapter->scan_probes);
 859
 860                 /*
 861                  * Set the BSSID filter to the incoming configuration,
 862                  * if non-zero.  If not set, it will remain disabled
 863                  * (all zeros).
 864                  */
 865                 memcpy(scan_cfg_out->specific_bssid,
 866                        user_scan_in->specific_bssid,
 867                        sizeof(scan_cfg_out->specific_bssid));
 868
 869                 if (adapter->ext_scan &&
 870                     !is_zero_ether_addr(scan_cfg_out->specific_bssid)) {
 871                         bssid_tlv =
 872                                 (struct mwifiex_ie_types_bssid_list *)tlv_pos;
 873                         bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID);
 874                         bssid_tlv->header.len = cpu_to_le16(ETH_ALEN);
 875                         memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid,
 876                                ETH_ALEN);
 877                         tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list);
 878                 }
 879
 880                 for (i = 0; i < user_scan_in->num_ssids; i++) {
 881                         ssid_len = user_scan_in->ssid_list[i].ssid_len;
 882
 883                         wildcard_ssid_tlv =
 884                                 (struct mwifiex_ie_types_wildcard_ssid_params *)
 885                                 tlv_pos;
 886                         wildcard_ssid_tlv->header.type =
 887                                 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
 888                         wildcard_ssid_tlv->header.len = cpu_to_le16(
 889                                 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
 890                                                          max_ssid_length)));
 891
 892                         /*
 893                          * max_ssid_length = 0 tells firmware to perform
 894                          * specific scan for the SSID filled, whereas
 895                          * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
 896                          * wildcard scan.
 897                          */
 898                         if (ssid_len)
 899                                 wildcard_ssid_tlv->max_ssid_length = 0;
 900                         else
 901                                 wildcard_ssid_tlv->max_ssid_length =
 902                                                         IEEE80211_MAX_SSID_LEN;
 903
 904                         memcpy(wildcard_ssid_tlv->ssid,
 905                                user_scan_in->ssid_list[i].ssid, ssid_len);
 906
 907                         tlv_pos += (sizeof(wildcard_ssid_tlv->header)
 908                                 + le16_to_cpu(wildcard_ssid_tlv->header.len));
 909
 910                         dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
 911                                 i, wildcard_ssid_tlv->ssid,
 912                                 wildcard_ssid_tlv->max_ssid_length);
 913
 914                         /* Empty wildcard ssid with a maxlen will match many or
 915                            potentially all SSIDs (maxlen == 32), therefore do
 916                            not treat the scan as
 917                            filtered. */
 918                         if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
 919                                 ssid_filter = false;
 920                 }
 921
 922                 /*
 923                  *  The default number of channels sent in the command is low to
 924                  *  ensure the response buffer from the firmware does not
 925                  *  truncate scan results.  That is not an issue with an SSID
 926                  *  or BSSID filter applied to the scan results in the firmware.
 927                  */
 928                 if ((i && ssid_filter) ||
 929                     !is_zero_ether_addr(scan_cfg_out->specific_bssid))
 930                         *filtered_scan = true;
 931         } else {
 932                 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
 933                 num_probes = adapter->scan_probes;
 934         }
 935
 936         /*
 937          *  If a specific BSSID or SSID is used, the number of channels in the
 938          *  scan command will be increased to the absolute maximum.
 939          */
 940         if (*filtered_scan)
 941                 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
 942         else
 943                 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
 944
 945         /* If the input config or adapter has the number of Probes set,
 946            add tlv */
 947         if (num_probes) {
 948
 949                 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
 950                         num_probes);
 951
 952                 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
 953                 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
 954                 num_probes_tlv->header.len =
 955                         cpu_to_le16(sizeof(num_probes_tlv->num_probes));
 956                 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
 957
 958                 tlv_pos += sizeof(num_probes_tlv->header) +
 959                         le16_to_cpu(num_probes_tlv->header.len);
 960
 961         }
 962
 963         if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
 964             (priv->adapter->config_bands & BAND_GN ||
 965              priv->adapter->config_bands & BAND_AN)) {
 966                 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
 967                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 968                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 969                 ht_cap->header.len =
 970                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 971                 radio_type =
 972                         mwifiex_band_to_radio_type(priv->adapter->config_bands);
 973                 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
 974                 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
 975         }
 976
 977         /* Append vendor specific IE TLV */
 978         mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
 979
 980         /*
 981          * Set the output for the channel TLV to the address in the tlv buffer
 982          *   past any TLVs that were added in this function (SSID, num_probes).
 983          *   Channel TLVs will be added past this for each scan command,
 984          *   preserving the TLVs that were previously added.
 985          */
 986         *chan_list_out =
 987                 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
 988
 989         if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
 990
 991                 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
 992
 993                 for (chan_idx = 0;
 994                      chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
 995                      user_scan_in->chan_list[chan_idx].chan_number;
 996                      chan_idx++) {
 997
 998                         channel = user_scan_in->chan_list[chan_idx].chan_number;
 999                         (scan_chan_list + chan_idx)->chan_number = channel;
1000
1001                         radio_type =
1002                                 user_scan_in->chan_list[chan_idx].radio_type;
1003                         (scan_chan_list + chan_idx)->radio_type = radio_type;
1004
1005                         scan_type = user_scan_in->chan_list[chan_idx].scan_type;
1006
1007                         if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1008                                 (scan_chan_list +
1009                                  chan_idx)->chan_scan_mode_bitmap
1010                                         |= MWIFIEX_PASSIVE_SCAN;
1011                         else
1012                                 (scan_chan_list +
1013                                  chan_idx)->chan_scan_mode_bitmap
1014                                         &= ~MWIFIEX_PASSIVE_SCAN;
1015
1016                         if (*filtered_scan)
1017                                 (scan_chan_list +
1018                                  chan_idx)->chan_scan_mode_bitmap
1019                                         |= MWIFIEX_DISABLE_CHAN_FILT;
1020
1021                         if (user_scan_in->chan_list[chan_idx].scan_time) {
1022                                 scan_dur = (u16) user_scan_in->
1023                                         chan_list[chan_idx].scan_time;
1024                         } else {
1025                                 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1026                                         scan_dur = adapter->passive_scan_time;
1027                                 else if (*filtered_scan)
1028                                         scan_dur = adapter->specific_scan_time;
1029                                 else
1030                                         scan_dur = adapter->active_scan_time;
1031                         }
1032
1033                         (scan_chan_list + chan_idx)->min_scan_time =
1034                                 cpu_to_le16(scan_dur);
1035                         (scan_chan_list + chan_idx)->max_scan_time =
1036                                 cpu_to_le16(scan_dur);
1037                 }
1038
1039                 /* Check if we are only scanning the current channel */
1040                 if ((chan_idx == 1) &&
1041                     (user_scan_in->chan_list[0].chan_number ==
1042                      priv->curr_bss_params.bss_descriptor.channel)) {
1043                         *scan_current_only = true;
1044                         dev_dbg(adapter->dev,
1045                                 "info: Scan: Scanning current channel only\n");
1046                 }
1047                 chan_num = chan_idx;
1048         } else {
1049                 dev_dbg(adapter->dev,
1050                         "info: Scan: Creating full region channel list\n");
1051                 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
1052                                                             scan_chan_list,
1053                                                             *filtered_scan);
1054         }
1055
1056         /*
1057          * In associated state we will reduce the number of channels scanned per
1058          * scan command to avoid any traffic delay/loss. This number is decided
1059          * based on total number of channels to be scanned due to constraints
1060          * of command buffers.
1061          */
1062         if (priv->media_connected) {
1063                 if (chan_num < MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD)
1064                         *max_chan_per_scan = 1;
1065                 else if (chan_num < MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD)
1066                         *max_chan_per_scan = 2;
1067                 else if (chan_num < MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD)
1068                         *max_chan_per_scan = 3;
1069                 else
1070                         *max_chan_per_scan = 4;
1071         }
1072 }
1073
1074 /*
1075  * This function inspects the scan response buffer for pointers to
1076  * expected TLVs.
1077  *
1078  * TLVs can be included at the end of the scan response BSS information.
1079  *
1080  * Data in the buffer is parsed pointers to TLVs that can potentially
1081  * be passed back in the response.
1082  */
1083 static void
1084 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1085                                      struct mwifiex_ie_types_data *tlv,
1086                                      u32 tlv_buf_size, u32 req_tlv_type,
1087                                      struct mwifiex_ie_types_data **tlv_data)
1088 {
1089         struct mwifiex_ie_types_data *current_tlv;
1090         u32 tlv_buf_left;
1091         u32 tlv_type;
1092         u32 tlv_len;
1093
1094         current_tlv = tlv;
1095         tlv_buf_left = tlv_buf_size;
1096         *tlv_data = NULL;
1097
1098         dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1099                 tlv_buf_size);
1100
1101         while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1102
1103                 tlv_type = le16_to_cpu(current_tlv->header.type);
1104                 tlv_len = le16_to_cpu(current_tlv->header.len);
1105
1106                 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1107                         dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1108                         break;
1109                 }
1110
1111                 if (req_tlv_type == tlv_type) {
1112                         switch (tlv_type) {
1113                         case TLV_TYPE_TSFTIMESTAMP:
1114                                 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1115                                         "timestamp TLV, len = %d\n", tlv_len);
1116                                 *tlv_data = current_tlv;
1117                                 break;
1118                         case TLV_TYPE_CHANNELBANDLIST:
1119                                 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1120                                         " band list TLV, len = %d\n", tlv_len);
1121                                 *tlv_data = current_tlv;
1122                                 break;
1123                         default:
1124                                 dev_err(adapter->dev,
1125                                         "SCAN_RESP: unhandled TLV = %d\n",
1126                                        tlv_type);
1127                                 /* Give up, this seems corrupted */
1128                                 return;
1129                         }
1130                 }
1131
1132                 if (*tlv_data)
1133                         break;
1134
1135
1136                 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1137                 current_tlv =
1138                         (struct mwifiex_ie_types_data *) (current_tlv->data +
1139                                                           tlv_len);
1140
1141         }                       /* while */
1142 }
1143
1144 /*
1145  * This function parses provided beacon buffer and updates
1146  * respective fields in bss descriptor structure.
1147  */
1148 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1149                                     struct mwifiex_bssdescriptor *bss_entry)
1150 {
1151         int ret = 0;
1152         u8 element_id;
1153         struct ieee_types_fh_param_set *fh_param_set;
1154         struct ieee_types_ds_param_set *ds_param_set;
1155         struct ieee_types_cf_param_set *cf_param_set;
1156         struct ieee_types_ibss_param_set *ibss_param_set;
1157         u8 *current_ptr;
1158         u8 *rate;
1159         u8 element_len;
1160         u16 total_ie_len;
1161         u8 bytes_to_copy;
1162         u8 rate_size;
1163         u8 found_data_rate_ie;
1164         u32 bytes_left;
1165         struct ieee_types_vendor_specific *vendor_ie;
1166         const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1167         const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1168
1169         found_data_rate_ie = false;
1170         rate_size = 0;
1171         current_ptr = bss_entry->beacon_buf;
1172         bytes_left = bss_entry->beacon_buf_size;
1173
1174         /* Process variable IE */
1175         while (bytes_left >= 2) {
1176                 element_id = *current_ptr;
1177                 element_len = *(current_ptr + 1);
1178                 total_ie_len = element_len + sizeof(struct ieee_types_header);
1179
1180                 if (bytes_left < total_ie_len) {
1181                         dev_err(adapter->dev, "err: InterpretIE: in processing"
1182                                 " IE, bytes left < IE length\n");
1183                         return -1;
1184                 }
1185                 switch (element_id) {
1186                 case WLAN_EID_SSID:
1187                         bss_entry->ssid.ssid_len = element_len;
1188                         memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1189                                element_len);
1190                         dev_dbg(adapter->dev,
1191                                 "info: InterpretIE: ssid: %-32s\n",
1192                                 bss_entry->ssid.ssid);
1193                         break;
1194
1195                 case WLAN_EID_SUPP_RATES:
1196                         memcpy(bss_entry->data_rates, current_ptr + 2,
1197                                element_len);
1198                         memcpy(bss_entry->supported_rates, current_ptr + 2,
1199                                element_len);
1200                         rate_size = element_len;
1201                         found_data_rate_ie = true;
1202                         break;
1203
1204                 case WLAN_EID_FH_PARAMS:
1205                         fh_param_set =
1206                                 (struct ieee_types_fh_param_set *) current_ptr;
1207                         memcpy(&bss_entry->phy_param_set.fh_param_set,
1208                                fh_param_set,
1209                                sizeof(struct ieee_types_fh_param_set));
1210                         break;
1211
1212                 case WLAN_EID_DS_PARAMS:
1213                         ds_param_set =
1214                                 (struct ieee_types_ds_param_set *) current_ptr;
1215
1216                         bss_entry->channel = ds_param_set->current_chan;
1217
1218                         memcpy(&bss_entry->phy_param_set.ds_param_set,
1219                                ds_param_set,
1220                                sizeof(struct ieee_types_ds_param_set));
1221                         break;
1222
1223                 case WLAN_EID_CF_PARAMS:
1224                         cf_param_set =
1225                                 (struct ieee_types_cf_param_set *) current_ptr;
1226                         memcpy(&bss_entry->ss_param_set.cf_param_set,
1227                                cf_param_set,
1228                                sizeof(struct ieee_types_cf_param_set));
1229                         break;
1230
1231                 case WLAN_EID_IBSS_PARAMS:
1232                         ibss_param_set =
1233                                 (struct ieee_types_ibss_param_set *)
1234                                 current_ptr;
1235                         memcpy(&bss_entry->ss_param_set.ibss_param_set,
1236                                ibss_param_set,
1237                                sizeof(struct ieee_types_ibss_param_set));
1238                         break;
1239
1240                 case WLAN_EID_ERP_INFO:
1241                         bss_entry->erp_flags = *(current_ptr + 2);
1242                         break;
1243
1244                 case WLAN_EID_PWR_CONSTRAINT:
1245                         bss_entry->local_constraint = *(current_ptr + 2);
1246                         bss_entry->sensed_11h = true;
1247                         break;
1248
1249                 case WLAN_EID_CHANNEL_SWITCH:
1250                         bss_entry->chan_sw_ie_present = true;
1251                 case WLAN_EID_PWR_CAPABILITY:
1252                 case WLAN_EID_TPC_REPORT:
1253                 case WLAN_EID_QUIET:
1254                         bss_entry->sensed_11h = true;
1255                     break;
1256
1257                 case WLAN_EID_EXT_SUPP_RATES:
1258                         /*
1259                          * Only process extended supported rate
1260                          * if data rate is already found.
1261                          * Data rate IE should come before
1262                          * extended supported rate IE
1263                          */
1264                         if (found_data_rate_ie) {
1265                                 if ((element_len + rate_size) >
1266                                     MWIFIEX_SUPPORTED_RATES)
1267                                         bytes_to_copy =
1268                                                 (MWIFIEX_SUPPORTED_RATES -
1269                                                  rate_size);
1270                                 else
1271                                         bytes_to_copy = element_len;
1272
1273                                 rate = (u8 *) bss_entry->data_rates;
1274                                 rate += rate_size;
1275                                 memcpy(rate, current_ptr + 2, bytes_to_copy);
1276
1277                                 rate = (u8 *) bss_entry->supported_rates;
1278                                 rate += rate_size;
1279                                 memcpy(rate, current_ptr + 2, bytes_to_copy);
1280                         }
1281                         break;
1282
1283                 case WLAN_EID_VENDOR_SPECIFIC:
1284                         vendor_ie = (struct ieee_types_vendor_specific *)
1285                                         current_ptr;
1286
1287                         if (!memcmp
1288                             (vendor_ie->vend_hdr.oui, wpa_oui,
1289                              sizeof(wpa_oui))) {
1290                                 bss_entry->bcn_wpa_ie =
1291                                         (struct ieee_types_vendor_specific *)
1292                                         current_ptr;
1293                                 bss_entry->wpa_offset = (u16)
1294                                         (current_ptr - bss_entry->beacon_buf);
1295                         } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1296                                     sizeof(wmm_oui))) {
1297                                 if (total_ie_len ==
1298                                     sizeof(struct ieee_types_wmm_parameter) ||
1299                                     total_ie_len ==
1300                                     sizeof(struct ieee_types_wmm_info))
1301                                         /*
1302                                          * Only accept and copy the WMM IE if
1303                                          * it matches the size expected for the
1304                                          * WMM Info IE or the WMM Parameter IE.
1305                                          */
1306                                         memcpy((u8 *) &bss_entry->wmm_ie,
1307                                                current_ptr, total_ie_len);
1308                         }
1309                         break;
1310                 case WLAN_EID_RSN:
1311                         bss_entry->bcn_rsn_ie =
1312                                 (struct ieee_types_generic *) current_ptr;
1313                         bss_entry->rsn_offset = (u16) (current_ptr -
1314                                                         bss_entry->beacon_buf);
1315                         break;
1316                 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1317                         bss_entry->bcn_wapi_ie =
1318                                 (struct ieee_types_generic *) current_ptr;
1319                         bss_entry->wapi_offset = (u16) (current_ptr -
1320                                                         bss_entry->beacon_buf);
1321                         break;
1322                 case WLAN_EID_HT_CAPABILITY:
1323                         bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1324                                         (current_ptr +
1325                                         sizeof(struct ieee_types_header));
1326                         bss_entry->ht_cap_offset = (u16) (current_ptr +
1327                                         sizeof(struct ieee_types_header) -
1328                                         bss_entry->beacon_buf);
1329                         break;
1330                 case WLAN_EID_HT_OPERATION:
1331                         bss_entry->bcn_ht_oper =
1332                                 (struct ieee80211_ht_operation *)(current_ptr +
1333                                         sizeof(struct ieee_types_header));
1334                         bss_entry->ht_info_offset = (u16) (current_ptr +
1335                                         sizeof(struct ieee_types_header) -
1336                                         bss_entry->beacon_buf);
1337                         break;
1338                 case WLAN_EID_VHT_CAPABILITY:
1339                         bss_entry->disable_11ac = false;
1340                         bss_entry->bcn_vht_cap =
1341                                 (void *)(current_ptr +
1342                                          sizeof(struct ieee_types_header));
1343                         bss_entry->vht_cap_offset =
1344                                         (u16)((u8 *)bss_entry->bcn_vht_cap -
1345                                               bss_entry->beacon_buf);
1346                         break;
1347                 case WLAN_EID_VHT_OPERATION:
1348                         bss_entry->bcn_vht_oper =
1349                                 (void *)(current_ptr +
1350                                          sizeof(struct ieee_types_header));
1351                         bss_entry->vht_info_offset =
1352                                         (u16)((u8 *)bss_entry->bcn_vht_oper -
1353                                               bss_entry->beacon_buf);
1354                         break;
1355                 case WLAN_EID_BSS_COEX_2040:
1356                         bss_entry->bcn_bss_co_2040 = current_ptr +
1357                                 sizeof(struct ieee_types_header);
1358                         bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1359                                         sizeof(struct ieee_types_header) -
1360                                                 bss_entry->beacon_buf);
1361                         break;
1362                 case WLAN_EID_EXT_CAPABILITY:
1363                         bss_entry->bcn_ext_cap = current_ptr +
1364                                 sizeof(struct ieee_types_header);
1365                         bss_entry->ext_cap_offset = (u16) (current_ptr +
1366                                         sizeof(struct ieee_types_header) -
1367                                         bss_entry->beacon_buf);
1368                         break;
1369                 case WLAN_EID_OPMODE_NOTIF:
1370                         bss_entry->oper_mode =
1371                                 (void *)(current_ptr +
1372                                          sizeof(struct ieee_types_header));
1373                         bss_entry->oper_mode_offset =
1374                                         (u16)((u8 *)bss_entry->oper_mode -
1375                                               bss_entry->beacon_buf);
1376                         break;
1377                 default:
1378                         break;
1379                 }
1380
1381                 current_ptr += element_len + 2;
1382
1383                 /* Need to account for IE ID and IE Len */
1384                 bytes_left -= (element_len + 2);
1385
1386         }       /* while (bytes_left > 2) */
1387         return ret;
1388 }
1389
1390 /*
1391  * This function converts radio type scan parameter to a band configuration
1392  * to be used in join command.
1393  */
1394 static u8
1395 mwifiex_radio_type_to_band(u8 radio_type)
1396 {
1397         switch (radio_type) {
1398         case HostCmd_SCAN_RADIO_TYPE_A:
1399                 return BAND_A;
1400         case HostCmd_SCAN_RADIO_TYPE_BG:
1401         default:
1402                 return BAND_G;
1403         }
1404 }
1405
1406 /*
1407  * This is an internal function used to start a scan based on an input
1408  * configuration.
1409  *
1410  * This uses the input user scan configuration information when provided in
1411  * order to send the appropriate scan commands to firmware to populate or
1412  * update the internal driver scan table.
1413  */
1414 int mwifiex_scan_networks(struct mwifiex_private *priv,
1415                           const struct mwifiex_user_scan_cfg *user_scan_in)
1416 {
1417         int ret;
1418         struct mwifiex_adapter *adapter = priv->adapter;
1419         struct cmd_ctrl_node *cmd_node;
1420         union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1421         struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1422         struct mwifiex_chan_scan_param_set *scan_chan_list;
1423         u8 filtered_scan;
1424         u8 scan_current_chan_only;
1425         u8 max_chan_per_scan;
1426         unsigned long flags;
1427
1428         if (adapter->scan_processing) {
1429                 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1430                 return -EBUSY;
1431         }
1432
1433         if (priv->scan_block) {
1434                 dev_err(adapter->dev,
1435                         "cmd: Scan is blocked during association...\n");
1436                 return -EBUSY;
1437         }
1438
1439         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1440         adapter->scan_processing = true;
1441         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1442
1443         scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1444                                GFP_KERNEL);
1445         if (!scan_cfg_out) {
1446                 ret = -ENOMEM;
1447                 goto done;
1448         }
1449
1450         scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX,
1451                                  sizeof(struct mwifiex_chan_scan_param_set),
1452                                  GFP_KERNEL);
1453         if (!scan_chan_list) {
1454                 kfree(scan_cfg_out);
1455                 ret = -ENOMEM;
1456                 goto done;
1457         }
1458
1459         mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1460                             &chan_list_out, scan_chan_list, &max_chan_per_scan,
1461                             &filtered_scan, &scan_current_chan_only);
1462
1463         ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1464                                         &scan_cfg_out->config, chan_list_out,
1465                                         scan_chan_list);
1466
1467         /* Get scan command from scan_pending_q and put to cmd_pending_q */
1468         if (!ret) {
1469                 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1470                 if (!list_empty(&adapter->scan_pending_q)) {
1471                         cmd_node = list_first_entry(&adapter->scan_pending_q,
1472                                                     struct cmd_ctrl_node, list);
1473                         list_del(&cmd_node->list);
1474                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1475                                                flags);
1476                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1477                                                         true);
1478                         queue_work(adapter->workqueue, &adapter->main_work);
1479
1480                         /* Perform internal scan synchronously */
1481                         if (!priv->scan_request) {
1482                                 dev_dbg(adapter->dev, "wait internal scan\n");
1483                                 mwifiex_wait_queue_complete(adapter, cmd_node);
1484                         }
1485                 } else {
1486                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1487                                                flags);
1488                 }
1489         }
1490
1491         kfree(scan_cfg_out);
1492         kfree(scan_chan_list);
1493 done:
1494         if (ret) {
1495                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1496                 adapter->scan_processing = false;
1497                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1498         }
1499         return ret;
1500 }
1501
1502 /*
1503  * This function prepares a scan command to be sent to the firmware.
1504  *
1505  * This uses the scan command configuration sent to the command processing
1506  * module in command preparation stage to configure a scan command structure
1507  * to send to firmware.
1508  *
1509  * The fixed fields specifying the BSS type and BSSID filters as well as a
1510  * variable number/length of TLVs are sent in the command to firmware.
1511  *
1512  * Preparation also includes -
1513  *      - Setting command ID, and proper size
1514  *      - Ensuring correct endian-ness
1515  */
1516 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1517                             struct mwifiex_scan_cmd_config *scan_cfg)
1518 {
1519         struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1520
1521         /* Set fixed field variables in scan command */
1522         scan_cmd->bss_mode = scan_cfg->bss_mode;
1523         memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1524                sizeof(scan_cmd->bssid));
1525         memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1526
1527         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1528
1529         /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1530         cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1531                                           + sizeof(scan_cmd->bssid)
1532                                           + scan_cfg->tlv_buf_len + S_DS_GEN));
1533
1534         return 0;
1535 }
1536
1537 /*
1538  * This function checks compatibility of requested network with current
1539  * driver settings.
1540  */
1541 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1542                                         struct mwifiex_bssdescriptor *bss_desc)
1543 {
1544         int ret = -1;
1545
1546         if (!bss_desc)
1547                 return -1;
1548
1549         if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1550                              (u16) bss_desc->channel, 0))) {
1551                 switch (priv->bss_mode) {
1552                 case NL80211_IFTYPE_STATION:
1553                 case NL80211_IFTYPE_ADHOC:
1554                         ret = mwifiex_is_network_compatible(priv, bss_desc,
1555                                                             priv->bss_mode);
1556                         if (ret)
1557                                 dev_err(priv->adapter->dev,
1558                                         "Incompatible network settings\n");
1559                         break;
1560                 default:
1561                         ret = 0;
1562                 }
1563         }
1564
1565         return ret;
1566 }
1567
1568 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1569                                           struct cfg80211_bss *bss)
1570 {
1571         struct mwifiex_bssdescriptor *bss_desc;
1572         int ret;
1573         unsigned long flags;
1574
1575         /* Allocate and fill new bss descriptor */
1576         bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL);
1577         if (!bss_desc)
1578                 return -ENOMEM;
1579
1580         ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1581         if (ret)
1582                 goto done;
1583
1584         ret = mwifiex_check_network_compatibility(priv, bss_desc);
1585         if (ret)
1586                 goto done;
1587
1588         spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1589         /* Make a copy of current BSSID descriptor */
1590         memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1591                sizeof(priv->curr_bss_params.bss_descriptor));
1592
1593         /* The contents of beacon_ie will be copied to its own buffer
1594          * in mwifiex_save_curr_bcn()
1595          */
1596         mwifiex_save_curr_bcn(priv);
1597         spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1598
1599 done:
1600         /* beacon_ie buffer was allocated in function
1601          * mwifiex_fill_new_bss_desc(). Free it now.
1602          */
1603         kfree(bss_desc->beacon_buf);
1604         kfree(bss_desc);
1605         return 0;
1606 }
1607
1608 static int
1609 mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
1610                                   u32 *bytes_left, u64 fw_tsf, u8 *radio_type,
1611                                   bool ext_scan, s32 rssi_val)
1612 {
1613         struct mwifiex_adapter *adapter = priv->adapter;
1614         struct mwifiex_chan_freq_power *cfp;
1615         struct cfg80211_bss *bss;
1616         u8 bssid[ETH_ALEN];
1617         s32 rssi;
1618         const u8 *ie_buf;
1619         size_t ie_len;
1620         u16 channel = 0;
1621         u16 beacon_size = 0;
1622         u32 curr_bcn_bytes;
1623         u32 freq;
1624         u16 beacon_period;
1625         u16 cap_info_bitmap;
1626         u8 *current_ptr;
1627         u64 timestamp;
1628         struct mwifiex_fixed_bcn_param *bcn_param;
1629         struct mwifiex_bss_priv *bss_priv;
1630
1631         if (*bytes_left >= sizeof(beacon_size)) {
1632                 /* Extract & convert beacon size from command buffer */
1633                 memcpy(&beacon_size, *bss_info, sizeof(beacon_size));
1634                 *bytes_left -= sizeof(beacon_size);
1635                 *bss_info += sizeof(beacon_size);
1636         }
1637
1638         if (!beacon_size || beacon_size > *bytes_left) {
1639                 *bss_info += *bytes_left;
1640                 *bytes_left = 0;
1641                 return -EFAULT;
1642         }
1643
1644         /* Initialize the current working beacon pointer for this BSS
1645          * iteration
1646          */
1647         current_ptr = *bss_info;
1648
1649         /* Advance the return beacon pointer past the current beacon */
1650         *bss_info += beacon_size;
1651         *bytes_left -= beacon_size;
1652
1653         curr_bcn_bytes = beacon_size;
1654
1655         /* First 5 fields are bssid, RSSI(for legacy scan only),
1656          * time stamp, beacon interval, and capability information
1657          */
1658         if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
1659             sizeof(struct mwifiex_fixed_bcn_param)) {
1660                 dev_err(adapter->dev, "InterpretIE: not enough bytes left\n");
1661                 return -EFAULT;
1662         }
1663
1664         memcpy(bssid, current_ptr, ETH_ALEN);
1665         current_ptr += ETH_ALEN;
1666         curr_bcn_bytes -= ETH_ALEN;
1667
1668         if (!ext_scan) {
1669                 rssi = (s32) *current_ptr;
1670                 rssi = (-rssi) * 100;           /* Convert dBm to mBm */
1671                 current_ptr += sizeof(u8);
1672                 curr_bcn_bytes -= sizeof(u8);
1673                 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
1674         } else {
1675                 rssi = rssi_val;
1676         }
1677
1678         bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr;
1679         current_ptr += sizeof(*bcn_param);
1680         curr_bcn_bytes -= sizeof(*bcn_param);
1681
1682         timestamp = le64_to_cpu(bcn_param->timestamp);
1683         beacon_period = le16_to_cpu(bcn_param->beacon_period);
1684
1685         cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1686         dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1687                 cap_info_bitmap);
1688
1689         /* Rest of the current buffer are IE's */
1690         ie_buf = current_ptr;
1691         ie_len = curr_bcn_bytes;
1692         dev_dbg(adapter->dev, "info: InterpretIE: IELength for this AP = %d\n",
1693                 curr_bcn_bytes);
1694
1695         while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1696                 u8 element_id, element_len;
1697
1698                 element_id = *current_ptr;
1699                 element_len = *(current_ptr + 1);
1700                 if (curr_bcn_bytes < element_len +
1701                                 sizeof(struct ieee_types_header)) {
1702                         dev_err(adapter->dev,
1703                                 "%s: bytes left < IE length\n", __func__);
1704                         return -EFAULT;
1705                 }
1706                 if (element_id == WLAN_EID_DS_PARAMS) {
1707                         channel = *(current_ptr +
1708                                     sizeof(struct ieee_types_header));
1709                         break;
1710                 }
1711
1712                 current_ptr += element_len + sizeof(struct ieee_types_header);
1713                 curr_bcn_bytes -= element_len +
1714                                         sizeof(struct ieee_types_header);
1715         }
1716
1717         if (channel) {
1718                 struct ieee80211_channel *chan;
1719                 u8 band;
1720
1721                 /* Skip entry if on csa closed channel */
1722                 if (channel == priv->csa_chan) {
1723                         dev_dbg(adapter->dev,
1724                                 "Dropping entry on csa closed channel\n");
1725                         return 0;
1726                 }
1727
1728                 band = BAND_G;
1729                 if (radio_type)
1730                         band = mwifiex_radio_type_to_band(*radio_type &
1731                                                           (BIT(0) | BIT(1)));
1732
1733                 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1734
1735                 freq = cfp ? cfp->freq : 0;
1736
1737                 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1738
1739                 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1740                         bss = cfg80211_inform_bss(priv->wdev->wiphy,
1741                                             chan, bssid, timestamp,
1742                                             cap_info_bitmap, beacon_period,
1743                                             ie_buf, ie_len, rssi, GFP_KERNEL);
1744                         bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1745                         bss_priv->band = band;
1746                         bss_priv->fw_tsf = fw_tsf;
1747                         if (priv->media_connected &&
1748                             !memcmp(bssid, priv->curr_bss_params.bss_descriptor
1749                                     .mac_address, ETH_ALEN))
1750                                 mwifiex_update_curr_bss_params(priv, bss);
1751                         cfg80211_put_bss(priv->wdev->wiphy, bss);
1752                 }
1753         } else {
1754                 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1755         }
1756
1757         return 0;
1758 }
1759
1760 static void mwifiex_check_next_scan_command(struct mwifiex_private *priv)
1761 {
1762         struct mwifiex_adapter *adapter = priv->adapter;
1763         struct cmd_ctrl_node *cmd_node;
1764         unsigned long flags;
1765
1766         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1767         if (list_empty(&adapter->scan_pending_q)) {
1768                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1769                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1770                 adapter->scan_processing = false;
1771                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1772
1773                 /* Need to indicate IOCTL complete */
1774                 if (adapter->curr_cmd->wait_q_enabled) {
1775                         adapter->cmd_wait_q.status = 0;
1776                         if (!priv->scan_request) {
1777                                 dev_dbg(adapter->dev,
1778                                         "complete internal scan\n");
1779                                 mwifiex_complete_cmd(adapter,
1780                                                      adapter->curr_cmd);
1781                         }
1782                 }
1783                 if (priv->report_scan_result)
1784                         priv->report_scan_result = false;
1785
1786                 if (priv->scan_request) {
1787                         dev_dbg(adapter->dev, "info: notifying scan done\n");
1788                         cfg80211_scan_done(priv->scan_request, 0);
1789                         priv->scan_request = NULL;
1790                 } else {
1791                         priv->scan_aborting = false;
1792                         dev_dbg(adapter->dev, "info: scan already aborted\n");
1793                 }
1794         } else {
1795                 if ((priv->scan_aborting && !priv->scan_request) ||
1796                     priv->scan_block) {
1797                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1798                                                flags);
1799                         adapter->scan_delay_cnt = MWIFIEX_MAX_SCAN_DELAY_CNT;
1800                         mod_timer(&priv->scan_delay_timer, jiffies);
1801                         dev_dbg(priv->adapter->dev,
1802                                 "info: %s: triggerring scan abort\n", __func__);
1803                 } else if (!mwifiex_wmm_lists_empty(adapter) &&
1804                            (priv->scan_request && (priv->scan_request->flags &
1805                                             NL80211_SCAN_FLAG_LOW_PRIORITY))) {
1806                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1807                                                flags);
1808                         adapter->scan_delay_cnt = 1;
1809                         mod_timer(&priv->scan_delay_timer, jiffies +
1810                                   msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
1811                         dev_dbg(priv->adapter->dev,
1812                                 "info: %s: deferring scan\n", __func__);
1813                 } else {
1814                         /* Get scan command from scan_pending_q and put to
1815                          * cmd_pending_q
1816                          */
1817                         cmd_node = list_first_entry(&adapter->scan_pending_q,
1818                                                     struct cmd_ctrl_node, list);
1819                         list_del(&cmd_node->list);
1820                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1821                                                flags);
1822                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1823                                                         true);
1824                 }
1825         }
1826
1827         return;
1828 }
1829
1830 /*
1831  * This function handles the command response of scan.
1832  *
1833  * The response buffer for the scan command has the following
1834  * memory layout:
1835  *
1836  *      .-------------------------------------------------------------.
1837  *      |  Header (4 * sizeof(t_u16)):  Standard command response hdr |
1838  *      .-------------------------------------------------------------.
1839  *      |  BufSize (t_u16) : sizeof the BSS Description data          |
1840  *      .-------------------------------------------------------------.
1841  *      |  NumOfSet (t_u8) : Number of BSS Descs returned             |
1842  *      .-------------------------------------------------------------.
1843  *      |  BSSDescription data (variable, size given in BufSize)      |
1844  *      .-------------------------------------------------------------.
1845  *      |  TLV data (variable, size calculated using Header->Size,    |
1846  *      |            BufSize and sizeof the fixed fields above)       |
1847  *      .-------------------------------------------------------------.
1848  */
1849 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1850                             struct host_cmd_ds_command *resp)
1851 {
1852         int ret = 0;
1853         struct mwifiex_adapter *adapter = priv->adapter;
1854         struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1855         struct mwifiex_ie_types_data *tlv_data;
1856         struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1857         u8 *bss_info;
1858         u32 scan_resp_size;
1859         u32 bytes_left;
1860         u32 idx;
1861         u32 tlv_buf_size;
1862         struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1863         struct chan_band_param_set *chan_band;
1864         u8 is_bgscan_resp;
1865         __le64 fw_tsf = 0;
1866         u8 *radio_type;
1867
1868         is_bgscan_resp = (le16_to_cpu(resp->command)
1869                           == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1870         if (is_bgscan_resp)
1871                 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1872         else
1873                 scan_rsp = &resp->params.scan_resp;
1874
1875
1876         if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1877                 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1878                         scan_rsp->number_of_sets);
1879                 ret = -1;
1880                 goto check_next_scan;
1881         }
1882
1883         /* Check csa channel expiry before parsing scan response */
1884         mwifiex_11h_get_csa_closed_channel(priv);
1885
1886         bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1887         dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1888                 bytes_left);
1889
1890         scan_resp_size = le16_to_cpu(resp->size);
1891
1892         dev_dbg(adapter->dev,
1893                 "info: SCAN_RESP: returned %d APs before parsing\n",
1894                 scan_rsp->number_of_sets);
1895
1896         bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1897
1898         /*
1899          * The size of the TLV buffer is equal to the entire command response
1900          *   size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1901          *   BSS Descriptions (bss_descript_size as bytesLef) and the command
1902          *   response header (S_DS_GEN)
1903          */
1904         tlv_buf_size = scan_resp_size - (bytes_left
1905                                          + sizeof(scan_rsp->bss_descript_size)
1906                                          + sizeof(scan_rsp->number_of_sets)
1907                                          + S_DS_GEN);
1908
1909         tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1910                                                  bss_desc_and_tlv_buffer +
1911                                                  bytes_left);
1912
1913         /* Search the TLV buffer space in the scan response for any valid
1914            TLVs */
1915         mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1916                                              TLV_TYPE_TSFTIMESTAMP,
1917                                              (struct mwifiex_ie_types_data **)
1918                                              &tsf_tlv);
1919
1920         /* Search the TLV buffer space in the scan response for any valid
1921            TLVs */
1922         mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1923                                              TLV_TYPE_CHANNELBANDLIST,
1924                                              (struct mwifiex_ie_types_data **)
1925                                              &chan_band_tlv);
1926
1927         for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1928                 /*
1929                  * If the TSF TLV was appended to the scan results, save this
1930                  * entry's TSF value in the fw_tsf field. It is the firmware's
1931                  * TSF value at the time the beacon or probe response was
1932                  * received.
1933                  */
1934                 if (tsf_tlv)
1935                         memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1936                                sizeof(fw_tsf));
1937
1938                 if (chan_band_tlv) {
1939                         chan_band = &chan_band_tlv->chan_band_param[idx];
1940                         radio_type = &chan_band->radio_type;
1941                 } else {
1942                         radio_type = NULL;
1943                 }
1944
1945                 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
1946                                                         &bytes_left,
1947                                                         le64_to_cpu(fw_tsf),
1948                                                         radio_type, false, 0);
1949                 if (ret)
1950                         goto check_next_scan;
1951         }
1952
1953 check_next_scan:
1954         mwifiex_check_next_scan_command(priv);
1955         return ret;
1956 }
1957
1958 /*
1959  * This function prepares an extended scan command to be sent to the firmware
1960  *
1961  * This uses the scan command configuration sent to the command processing
1962  * module in command preparation stage to configure a extended scan command
1963  * structure to send to firmware.
1964  */
1965 int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv,
1966                                 struct host_cmd_ds_command *cmd,
1967                                 void *data_buf)
1968 {
1969         struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan;
1970         struct mwifiex_scan_cmd_config *scan_cfg = data_buf;
1971
1972         memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1973
1974         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT);
1975
1976         /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1977         cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved)
1978                                       + scan_cfg->tlv_buf_len + S_DS_GEN));
1979
1980         return 0;
1981 }
1982
1983 /* This function handles the command response of extended scan */
1984 int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv)
1985 {
1986         dev_dbg(priv->adapter->dev, "info: EXT scan returns successfully\n");
1987         return 0;
1988 }
1989
1990 /* This function This function handles the event extended scan report. It
1991  * parses extended scan results and informs to cfg80211 stack.
1992  */
1993 int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv,
1994                                          void *buf)
1995 {
1996         int ret = 0;
1997         struct mwifiex_adapter *adapter = priv->adapter;
1998         u8 *bss_info;
1999         u32 bytes_left, bytes_left_for_tlv, idx;
2000         u16 type, len;
2001         struct mwifiex_ie_types_data *tlv;
2002         struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv;
2003         struct mwifiex_ie_types_bss_scan_info *scan_info_tlv;
2004         u8 *radio_type;
2005         u64 fw_tsf = 0;
2006         s32 rssi = 0;
2007         struct mwifiex_event_scan_result *event_scan = buf;
2008         u8 num_of_set = event_scan->num_of_set;
2009         u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result);
2010         u16 scan_resp_size = le16_to_cpu(event_scan->buf_size);
2011
2012         if (num_of_set > MWIFIEX_MAX_AP) {
2013                 dev_err(adapter->dev,
2014                         "EXT_SCAN: Invalid number of AP returned (%d)!!\n",
2015                         num_of_set);
2016                 ret = -1;
2017                 goto check_next_scan;
2018         }
2019
2020         bytes_left = scan_resp_size;
2021         dev_dbg(adapter->dev,
2022                 "EXT_SCAN: size %d, returned %d APs...",
2023                 scan_resp_size, num_of_set);
2024
2025         tlv = (struct mwifiex_ie_types_data *)scan_resp;
2026
2027         for (idx = 0; idx < num_of_set && bytes_left; idx++) {
2028                 type = le16_to_cpu(tlv->header.type);
2029                 len = le16_to_cpu(tlv->header.len);
2030                 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) {
2031                         dev_err(adapter->dev, "EXT_SCAN: Error bytes left < TLV length\n");
2032                         break;
2033                 }
2034                 scan_rsp_tlv = NULL;
2035                 scan_info_tlv = NULL;
2036                 bytes_left_for_tlv = bytes_left;
2037
2038                 /* BSS response TLV with beacon or probe response buffer
2039                  * at the initial position of each descriptor
2040                  */
2041                 if (type != TLV_TYPE_BSS_SCAN_RSP)
2042                         break;
2043
2044                 bss_info = (u8 *)tlv;
2045                 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv;
2046                 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2047                 bytes_left_for_tlv -=
2048                                 (len + sizeof(struct mwifiex_ie_types_header));
2049
2050                 while (bytes_left_for_tlv >=
2051                        sizeof(struct mwifiex_ie_types_header) &&
2052                        le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) {
2053                         type = le16_to_cpu(tlv->header.type);
2054                         len = le16_to_cpu(tlv->header.len);
2055                         if (bytes_left_for_tlv <
2056                             sizeof(struct mwifiex_ie_types_header) + len) {
2057                                 dev_err(adapter->dev,
2058                                         "EXT_SCAN: Error in processing TLV, bytes left < TLV length\n");
2059                                 scan_rsp_tlv = NULL;
2060                                 bytes_left_for_tlv = 0;
2061                                 continue;
2062                         }
2063                         switch (type) {
2064                         case TLV_TYPE_BSS_SCAN_INFO:
2065                                 scan_info_tlv =
2066                                   (struct mwifiex_ie_types_bss_scan_info *)tlv;
2067                                 if (len !=
2068                                  sizeof(struct mwifiex_ie_types_bss_scan_info) -
2069                                  sizeof(struct mwifiex_ie_types_header)) {
2070                                         bytes_left_for_tlv = 0;
2071                                         continue;
2072                                 }
2073                                 break;
2074                         default:
2075                                 break;
2076                         }
2077                         tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2078                         bytes_left -=
2079                                 (len + sizeof(struct mwifiex_ie_types_header));
2080                         bytes_left_for_tlv -=
2081                                 (len + sizeof(struct mwifiex_ie_types_header));
2082                 }
2083
2084                 if (!scan_rsp_tlv)
2085                         break;
2086
2087                 /* Advance pointer to the beacon buffer length and
2088                  * update the bytes count so that the function
2089                  * wlan_interpret_bss_desc_with_ie() can handle the
2090                  * scan buffer withut any change
2091                  */
2092                 bss_info += sizeof(u16);
2093                 bytes_left -= sizeof(u16);
2094
2095                 if (scan_info_tlv) {
2096                         rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi));
2097                         rssi *= 100;           /* Convert dBm to mBm */
2098                         dev_dbg(adapter->dev,
2099                                 "info: InterpretIE: RSSI=%d\n", rssi);
2100                         fw_tsf = le64_to_cpu(scan_info_tlv->tsf);
2101                         radio_type = &scan_info_tlv->radio_type;
2102                 } else {
2103                         radio_type = NULL;
2104                 }
2105                 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
2106                                                         &bytes_left, fw_tsf,
2107                                                         radio_type, true, rssi);
2108                 if (ret)
2109                         goto check_next_scan;
2110         }
2111
2112 check_next_scan:
2113         if (!event_scan->more_event)
2114                 mwifiex_check_next_scan_command(priv);
2115
2116         return ret;
2117 }
2118
2119 /*
2120  * This function prepares command for background scan query.
2121  *
2122  * Preparation includes -
2123  *      - Setting command ID and proper size
2124  *      - Setting background scan flush parameter
2125  *      - Ensuring correct endian-ness
2126  */
2127 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
2128 {
2129         struct host_cmd_ds_802_11_bg_scan_query *bg_query =
2130                 &cmd->params.bg_scan_query;
2131
2132         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
2133         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
2134                                 + S_DS_GEN);
2135
2136         bg_query->flush = 1;
2137
2138         return 0;
2139 }
2140
2141 /*
2142  * This function inserts scan command node to the scan pending queue.
2143  */
2144 void
2145 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
2146                        struct cmd_ctrl_node *cmd_node)
2147 {
2148         struct mwifiex_adapter *adapter = priv->adapter;
2149         unsigned long flags;
2150
2151         cmd_node->wait_q_enabled = true;
2152         cmd_node->condition = &adapter->scan_wait_q_woken;
2153         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
2154         list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
2155         spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2156 }
2157
2158 /*
2159  * This function sends a scan command for all available channels to the
2160  * firmware, filtered on a specific SSID.
2161  */
2162 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
2163                                       struct cfg80211_ssid *req_ssid)
2164 {
2165         struct mwifiex_adapter *adapter = priv->adapter;
2166         int ret;
2167         struct mwifiex_user_scan_cfg *scan_cfg;
2168
2169         if (adapter->scan_processing) {
2170                 dev_err(adapter->dev, "cmd: Scan already in process...\n");
2171                 return -EBUSY;
2172         }
2173
2174         if (priv->scan_block) {
2175                 dev_err(adapter->dev,
2176                         "cmd: Scan is blocked during association...\n");
2177                 return -EBUSY;
2178         }
2179
2180         scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
2181         if (!scan_cfg)
2182                 return -ENOMEM;
2183
2184         scan_cfg->ssid_list = req_ssid;
2185         scan_cfg->num_ssids = 1;
2186
2187         ret = mwifiex_scan_networks(priv, scan_cfg);
2188
2189         kfree(scan_cfg);
2190         return ret;
2191 }
2192
2193 /*
2194  * Sends IOCTL request to start a scan.
2195  *
2196  * This function allocates the IOCTL request buffer, fills it
2197  * with requisite parameters and calls the IOCTL handler.
2198  *
2199  * Scan command can be issued for both normal scan and specific SSID
2200  * scan, depending upon whether an SSID is provided or not.
2201  */
2202 int mwifiex_request_scan(struct mwifiex_private *priv,
2203                          struct cfg80211_ssid *req_ssid)
2204 {
2205         int ret;
2206
2207         if (down_interruptible(&priv->async_sem)) {
2208                 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
2209                         __func__);
2210                 return -1;
2211         }
2212
2213         priv->adapter->scan_wait_q_woken = false;
2214
2215         if (req_ssid && req_ssid->ssid_len != 0)
2216                 /* Specific SSID scan */
2217                 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
2218         else
2219                 /* Normal scan */
2220                 ret = mwifiex_scan_networks(priv, NULL);
2221
2222         up(&priv->async_sem);
2223
2224         return ret;
2225 }
2226
2227 /*
2228  * This function appends the vendor specific IE TLV to a buffer.
2229  */
2230 int
2231 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
2232                             u16 vsie_mask, u8 **buffer)
2233 {
2234         int id, ret_len = 0;
2235         struct mwifiex_ie_types_vendor_param_set *vs_param_set;
2236
2237         if (!buffer)
2238                 return 0;
2239         if (!(*buffer))
2240                 return 0;
2241
2242         /*
2243          * Traverse through the saved vendor specific IE array and append
2244          * the selected(scan/assoc/adhoc) IE as TLV to the command
2245          */
2246         for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
2247                 if (priv->vs_ie[id].mask & vsie_mask) {
2248                         vs_param_set =
2249                                 (struct mwifiex_ie_types_vendor_param_set *)
2250                                 *buffer;
2251                         vs_param_set->header.type =
2252                                 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
2253                         vs_param_set->header.len =
2254                                 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
2255                                 & 0x00FF) + 2);
2256                         memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
2257                                le16_to_cpu(vs_param_set->header.len));
2258                         *buffer += le16_to_cpu(vs_param_set->header.len) +
2259                                    sizeof(struct mwifiex_ie_types_header);
2260                         ret_len += le16_to_cpu(vs_param_set->header.len) +
2261                                    sizeof(struct mwifiex_ie_types_header);
2262                 }
2263         }
2264         return ret_len;
2265 }
2266
2267 /*
2268  * This function saves a beacon buffer of the current BSS descriptor.
2269  *
2270  * The current beacon buffer is saved so that it can be restored in the
2271  * following cases that makes the beacon buffer not to contain the current
2272  * ssid's beacon buffer.
2273  *      - The current ssid was not found somehow in the last scan.
2274  *      - The current ssid was the last entry of the scan table and overloaded.
2275  */
2276 void
2277 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
2278 {
2279         struct mwifiex_bssdescriptor *curr_bss =
2280                 &priv->curr_bss_params.bss_descriptor;
2281
2282         if (!curr_bss->beacon_buf_size)
2283                 return;
2284
2285         /* allocate beacon buffer at 1st time; or if it's size has changed */
2286         if (!priv->curr_bcn_buf ||
2287             priv->curr_bcn_size != curr_bss->beacon_buf_size) {
2288                 priv->curr_bcn_size = curr_bss->beacon_buf_size;
2289
2290                 kfree(priv->curr_bcn_buf);
2291                 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
2292                                              GFP_ATOMIC);
2293                 if (!priv->curr_bcn_buf)
2294                         return;
2295         }
2296
2297         memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
2298                curr_bss->beacon_buf_size);
2299         dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2300                 priv->curr_bcn_size);
2301
2302         curr_bss->beacon_buf = priv->curr_bcn_buf;
2303
2304         /* adjust the pointers in the current BSS descriptor */
2305         if (curr_bss->bcn_wpa_ie)
2306                 curr_bss->bcn_wpa_ie =
2307                         (struct ieee_types_vendor_specific *)
2308                         (curr_bss->beacon_buf +
2309                          curr_bss->wpa_offset);
2310
2311         if (curr_bss->bcn_rsn_ie)
2312                 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2313                         (curr_bss->beacon_buf +
2314                          curr_bss->rsn_offset);
2315
2316         if (curr_bss->bcn_ht_cap)
2317                 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2318                         (curr_bss->beacon_buf +
2319                          curr_bss->ht_cap_offset);
2320
2321         if (curr_bss->bcn_ht_oper)
2322                 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
2323                         (curr_bss->beacon_buf +
2324                          curr_bss->ht_info_offset);
2325
2326         if (curr_bss->bcn_vht_cap)
2327                 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf +
2328                                                  curr_bss->vht_cap_offset);
2329
2330         if (curr_bss->bcn_vht_oper)
2331                 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf +
2332                                                   curr_bss->vht_info_offset);
2333
2334         if (curr_bss->bcn_bss_co_2040)
2335                 curr_bss->bcn_bss_co_2040 =
2336                         (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
2337
2338         if (curr_bss->bcn_ext_cap)
2339                 curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
2340                         curr_bss->ext_cap_offset;
2341
2342         if (curr_bss->oper_mode)
2343                 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
2344                                                curr_bss->oper_mode_offset);
2345 }
2346
2347 /*
2348  * This function frees the current BSS descriptor beacon buffer.
2349  */
2350 void
2351 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2352 {
2353         kfree(priv->curr_bcn_buf);
2354         priv->curr_bcn_buf = NULL;
2355 }