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_WPA))) {
 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_WPA)) &&
 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)).vend_hdr.element_id == WLAN_EID_WPA))
 241            /*
 242             * Privacy bit may NOT be set in some APs like
 243             * LinkSys WRT54G && bss_desc->privacy
 244             */
 245          ) {
 246                 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
 247                         " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
 248                         "EncMode=%#x privacy=%#x\n", __func__,
 249                         (bss_desc->bcn_wpa_ie) ?
 250                         (*(bss_desc->bcn_wpa_ie)).
 251                         vend_hdr.element_id : 0,
 252                         (bss_desc->bcn_rsn_ie) ?
 253                         (*(bss_desc->bcn_rsn_ie)).
 254                         ieee_hdr.element_id : 0,
 255                         (priv->sec_info.wep_enabled) ? "e" : "d",
 256                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 257                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 258                         priv->sec_info.encryption_mode,
 259                         bss_desc->privacy);
 260                 return true;
 261         }
 262         return false;
 263 }
 264
 265 /*
 266  * This function checks if wpa2 is enabled in driver and scanned network is
 267  * compatible with it.
 268  */
 269 static bool
 270 mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
 271                     struct mwifiex_bssdescriptor *bss_desc)
 272 {
 273         if (!priv->sec_info.wep_enabled &&
 274             !priv->sec_info.wpa_enabled &&
 275             priv->sec_info.wpa2_enabled &&
 276             ((bss_desc->bcn_rsn_ie) &&
 277              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
 278                 /*
 279                  * Privacy bit may NOT be set in some APs like
 280                  * LinkSys WRT54G && bss_desc->privacy
 281                  */
 282                 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
 283                         " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
 284                         "EncMode=%#x privacy=%#x\n", __func__,
 285                         (bss_desc->bcn_wpa_ie) ?
 286                         (*(bss_desc->bcn_wpa_ie)).
 287                         vend_hdr.element_id : 0,
 288                         (bss_desc->bcn_rsn_ie) ?
 289                         (*(bss_desc->bcn_rsn_ie)).
 290                         ieee_hdr.element_id : 0,
 291                         (priv->sec_info.wep_enabled) ? "e" : "d",
 292                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 293                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 294                         priv->sec_info.encryption_mode,
 295                         bss_desc->privacy);
 296                 return true;
 297         }
 298         return false;
 299 }
 300
 301 /*
 302  * This function checks if adhoc AES is enabled in driver and scanned network is
 303  * compatible with it.
 304  */
 305 static bool
 306 mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
 307                          struct mwifiex_bssdescriptor *bss_desc)
 308 {
 309         if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 310             !priv->sec_info.wpa2_enabled &&
 311             ((!bss_desc->bcn_wpa_ie) ||
 312              ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) &&
 313             ((!bss_desc->bcn_rsn_ie) ||
 314              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
 315             !priv->sec_info.encryption_mode && bss_desc->privacy) {
 316                 return true;
 317         }
 318         return false;
 319 }
 320
 321 /*
 322  * This function checks if dynamic WEP is enabled in driver and scanned network
 323  * is compatible with it.
 324  */
 325 static bool
 326 mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
 327                            struct mwifiex_bssdescriptor *bss_desc)
 328 {
 329         if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
 330             !priv->sec_info.wpa2_enabled &&
 331             ((!bss_desc->bcn_wpa_ie) ||
 332              ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) &&
 333             ((!bss_desc->bcn_rsn_ie) ||
 334              ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
 335             priv->sec_info.encryption_mode && bss_desc->privacy) {
 336                 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
 337                         "WEP: wpa_ie=%#x wpa2_ie=%#x "
 338                         "EncMode=%#x privacy=%#x\n",
 339                         __func__,
 340                         (bss_desc->bcn_wpa_ie) ?
 341                         (*(bss_desc->bcn_wpa_ie)).
 342                         vend_hdr.element_id : 0,
 343                         (bss_desc->bcn_rsn_ie) ?
 344                         (*(bss_desc->bcn_rsn_ie)).
 345                         ieee_hdr.element_id : 0,
 346                         priv->sec_info.encryption_mode,
 347                         bss_desc->privacy);
 348                 return true;
 349         }
 350         return false;
 351 }
 352
 353 /*
 354  * This function checks if a scanned network is compatible with the driver
 355  * settings.
 356  *
 357  *   WEP     WPA    WPA2   ad-hoc encrypt                  Network
 358  * enabled enabled enabled  AES    mode   Privacy WPA WPA2 Compatible
 359  *    0       0       0      0     NONE      0     0   0   yes No security
 360  *    0       1       0      0      x        1x    1   x   yes WPA (disable
 361  *                                                         HT if no AES)
 362  *    0       0       1      0      x        1x    x   1   yes WPA2 (disable
 363  *                                                         HT if no AES)
 364  *    0       0       0      1     NONE      1     0   0   yes Ad-hoc AES
 365  *    1       0       0      0     NONE      1     0   0   yes Static WEP
 366  *                                                         (disable HT)
 367  *    0       0       0      0    !=NONE     1     0   0   yes Dynamic WEP
 368  *
 369  * Compatibility is not matched while roaming, except for mode.
 370  */
 371 static s32
 372 mwifiex_is_network_compatible(struct mwifiex_private *priv,
 373                               struct mwifiex_bssdescriptor *bss_desc, u32 mode)
 374 {
 375         struct mwifiex_adapter *adapter = priv->adapter;
 376
 377         bss_desc->disable_11n = false;
 378
 379         /* Don't check for compatibility if roaming */
 380         if (priv->media_connected &&
 381             (priv->bss_mode == NL80211_IFTYPE_STATION) &&
 382             (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
 383                 return 0;
 384
 385         if (priv->wps.session_enable) {
 386                 dev_dbg(adapter->dev,
 387                         "info: return success directly in WPS period\n");
 388                 return 0;
 389         }
 390
 391         if (mwifiex_is_bss_wapi(priv, bss_desc)) {
 392                 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
 393                 return 0;
 394         }
 395
 396         if (bss_desc->bss_mode == mode) {
 397                 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
 398                         /* No security */
 399                         return 0;
 400                 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
 401                         /* Static WEP enabled */
 402                         dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
 403                         bss_desc->disable_11n = true;
 404                         return 0;
 405                 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
 406                         /* WPA enabled */
 407                         if (((priv->adapter->config_bands & BAND_GN ||
 408                               priv->adapter->config_bands & BAND_AN) &&
 409                              bss_desc->bcn_ht_cap) &&
 410                             !mwifiex_is_wpa_oui_present(bss_desc,
 411                                                          CIPHER_SUITE_CCMP)) {
 412
 413                                 if (mwifiex_is_wpa_oui_present
 414                                                 (bss_desc, CIPHER_SUITE_TKIP)) {
 415                                         dev_dbg(adapter->dev,
 416                                                 "info: Disable 11n if AES "
 417                                                 "is not supported by AP\n");
 418                                         bss_desc->disable_11n = true;
 419                                 } else {
 420                                         return -1;
 421                                 }
 422                         }
 423                         return 0;
 424                 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
 425                         /* WPA2 enabled */
 426                         if (((priv->adapter->config_bands & BAND_GN ||
 427                               priv->adapter->config_bands & BAND_AN) &&
 428                              bss_desc->bcn_ht_cap) &&
 429                             !mwifiex_is_rsn_oui_present(bss_desc,
 430                                                         CIPHER_SUITE_CCMP)) {
 431
 432                                 if (mwifiex_is_rsn_oui_present
 433                                                 (bss_desc, CIPHER_SUITE_TKIP)) {
 434                                         dev_dbg(adapter->dev,
 435                                                 "info: Disable 11n if AES "
 436                                                 "is not supported by AP\n");
 437                                         bss_desc->disable_11n = true;
 438                                 } else {
 439                                         return -1;
 440                                 }
 441                         }
 442                         return 0;
 443                 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
 444                         /* Ad-hoc AES enabled */
 445                         return 0;
 446                 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
 447                         /* Dynamic WEP enabled */
 448                         return 0;
 449                 }
 450
 451                 /* Security doesn't match */
 452                 dev_dbg(adapter->dev,
 453                         "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s "
 454                         "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__,
 455                         (bss_desc->bcn_wpa_ie) ?
 456                         (*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id : 0,
 457                         (bss_desc->bcn_rsn_ie) ?
 458                         (*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id : 0,
 459                         (priv->sec_info.wep_enabled) ? "e" : "d",
 460                         (priv->sec_info.wpa_enabled) ? "e" : "d",
 461                         (priv->sec_info.wpa2_enabled) ? "e" : "d",
 462                         priv->sec_info.encryption_mode, bss_desc->privacy);
 463                 return -1;
 464         }
 465
 466         /* Mode doesn't match */
 467         return -1;
 468 }
 469
 470 /*
 471  * This function creates a channel list for the driver to scan, based
 472  * on region/band information.
 473  *
 474  * This routine is used for any scan that is not provided with a
 475  * specific channel list to scan.
 476  */
 477 static int
 478 mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
 479                                  const struct mwifiex_user_scan_cfg
 480                                                         *user_scan_in,
 481                                  struct mwifiex_chan_scan_param_set
 482                                                         *scan_chan_list,
 483                                  u8 filtered_scan)
 484 {
 485         enum ieee80211_band band;
 486         struct ieee80211_supported_band *sband;
 487         struct ieee80211_channel *ch;
 488         struct mwifiex_adapter *adapter = priv->adapter;
 489         int chan_idx = 0, i;
 490
 491         for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
 492
 493                 if (!priv->wdev->wiphy->bands[band])
 494                         continue;
 495
 496                 sband = priv->wdev->wiphy->bands[band];
 497
 498                 for (i = 0; (i < sband->n_channels) ; i++) {
 499                         ch = &sband->channels[i];
 500                         if (ch->flags & IEEE80211_CHAN_DISABLED)
 501                                 continue;
 502                         scan_chan_list[chan_idx].radio_type = band;
 503
 504                         if (user_scan_in &&
 505                             user_scan_in->chan_list[0].scan_time)
 506                                 scan_chan_list[chan_idx].max_scan_time =
 507                                         cpu_to_le16((u16) user_scan_in->
 508                                         chan_list[0].scan_time);
 509                         else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 510                                 scan_chan_list[chan_idx].max_scan_time =
 511                                         cpu_to_le16(adapter->passive_scan_time);
 512                         else
 513                                 scan_chan_list[chan_idx].max_scan_time =
 514                                         cpu_to_le16(adapter->active_scan_time);
 515
 516                         if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 517                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 518                                         |= MWIFIEX_PASSIVE_SCAN;
 519                         else
 520                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 521                                         &= ~MWIFIEX_PASSIVE_SCAN;
 522                         scan_chan_list[chan_idx].chan_number =
 523                                                         (u32) ch->hw_value;
 524                         if (filtered_scan) {
 525                                 scan_chan_list[chan_idx].max_scan_time =
 526                                 cpu_to_le16(adapter->specific_scan_time);
 527                                 scan_chan_list[chan_idx].chan_scan_mode_bitmap
 528                                         |= MWIFIEX_DISABLE_CHAN_FILT;
 529                         }
 530                         chan_idx++;
 531                 }
 532
 533         }
 534         return chan_idx;
 535 }
 536
 537 /*
 538  * This function constructs and sends multiple scan config commands to
 539  * the firmware.
 540  *
 541  * Previous routines in the code flow have created a scan command configuration
 542  * with any requested TLVs.  This function splits the channel TLV into maximum
 543  * channels supported per scan lists and sends the portion of the channel TLV,
 544  * along with the other TLVs, to the firmware.
 545  */
 546 static int
 547 mwifiex_scan_channel_list(struct mwifiex_private *priv,
 548                           u32 max_chan_per_scan, u8 filtered_scan,
 549                           struct mwifiex_scan_cmd_config *scan_cfg_out,
 550                           struct mwifiex_ie_types_chan_list_param_set
 551                           *chan_tlv_out,
 552                           struct mwifiex_chan_scan_param_set *scan_chan_list)
 553 {
 554         int ret = 0;
 555         struct mwifiex_chan_scan_param_set *tmp_chan_list;
 556         struct mwifiex_chan_scan_param_set *start_chan;
 557
 558         u32 tlv_idx;
 559         u32 total_scan_time;
 560         u32 done_early;
 561
 562         if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
 563                 dev_dbg(priv->adapter->dev,
 564                         "info: Scan: Null detect: %p, %p, %p\n",
 565                        scan_cfg_out, chan_tlv_out, scan_chan_list);
 566                 return -1;
 567         }
 568
 569         chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 570
 571         /* Set the temp channel struct pointer to the start of the desired
 572            list */
 573         tmp_chan_list = scan_chan_list;
 574
 575         /* Loop through the desired channel list, sending a new firmware scan
 576            commands for each max_chan_per_scan channels (or for 1,6,11
 577            individually if configured accordingly) */
 578         while (tmp_chan_list->chan_number) {
 579
 580                 tlv_idx = 0;
 581                 total_scan_time = 0;
 582                 chan_tlv_out->header.len = 0;
 583                 start_chan = tmp_chan_list;
 584                 done_early = false;
 585
 586                 /*
 587                  * Construct the Channel TLV for the scan command.  Continue to
 588                  * insert channel TLVs until:
 589                  *   - the tlv_idx hits the maximum configured per scan command
 590                  *   - the next channel to insert is 0 (end of desired channel
 591                  *     list)
 592                  *   - done_early is set (controlling individual scanning of
 593                  *     1,6,11)
 594                  */
 595                 while (tlv_idx < max_chan_per_scan &&
 596                        tmp_chan_list->chan_number && !done_early) {
 597
 598                         dev_dbg(priv->adapter->dev,
 599                                 "info: Scan: Chan(%3d), Radio(%d),"
 600                                 " Mode(%d, %d), Dur(%d)\n",
 601                                 tmp_chan_list->chan_number,
 602                                 tmp_chan_list->radio_type,
 603                                 tmp_chan_list->chan_scan_mode_bitmap
 604                                 & MWIFIEX_PASSIVE_SCAN,
 605                                 (tmp_chan_list->chan_scan_mode_bitmap
 606                                  & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
 607                                 le16_to_cpu(tmp_chan_list->max_scan_time));
 608
 609                         /* Copy the current channel TLV to the command being
 610                            prepared */
 611                         memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
 612                                tmp_chan_list,
 613                                sizeof(chan_tlv_out->chan_scan_param));
 614
 615                         /* Increment the TLV header length by the size
 616                            appended */
 617                         chan_tlv_out->header.len =
 618                         cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) +
 619                         (sizeof(chan_tlv_out->chan_scan_param)));
 620
 621                         /*
 622                          * The tlv buffer length is set to the number of bytes
 623                          * of the between the channel tlv pointer and the start
 624                          * of the tlv buffer.  This compensates for any TLVs
 625                          * that were appended before the channel list.
 626                          */
 627                         scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
 628                                                         scan_cfg_out->tlv_buf);
 629
 630                         /* Add the size of the channel tlv header and the data
 631                            length */
 632                         scan_cfg_out->tlv_buf_len +=
 633                                 (sizeof(chan_tlv_out->header)
 634                                  + le16_to_cpu(chan_tlv_out->header.len));
 635
 636                         /* Increment the index to the channel tlv we are
 637                            constructing */
 638                         tlv_idx++;
 639
 640                         /* Count the total scan time per command */
 641                         total_scan_time +=
 642                                 le16_to_cpu(tmp_chan_list->max_scan_time);
 643
 644                         done_early = false;
 645
 646                         /* Stop the loop if the *current* channel is in the
 647                            1,6,11 set and we are not filtering on a BSSID
 648                            or SSID. */
 649                         if (!filtered_scan &&
 650                             (tmp_chan_list->chan_number == 1 ||
 651                              tmp_chan_list->chan_number == 6 ||
 652                              tmp_chan_list->chan_number == 11))
 653                                 done_early = true;
 654
 655                         /* Increment the tmp pointer to the next channel to
 656                            be scanned */
 657                         tmp_chan_list++;
 658
 659                         /* Stop the loop if the *next* channel is in the 1,6,11
 660                            set.  This will cause it to be the only channel
 661                            scanned on the next interation */
 662                         if (!filtered_scan &&
 663                             (tmp_chan_list->chan_number == 1 ||
 664                              tmp_chan_list->chan_number == 6 ||
 665                              tmp_chan_list->chan_number == 11))
 666                                 done_early = true;
 667                 }
 668
 669                 /* The total scan time should be less than scan command timeout
 670                    value */
 671                 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
 672                         dev_err(priv->adapter->dev, "total scan time %dms"
 673                                 " is over limit (%dms), scan skipped\n",
 674                                 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
 675                         ret = -1;
 676                         break;
 677                 }
 678
 679                 priv->adapter->scan_channels = start_chan;
 680
 681                 /* Send the scan command to the firmware with the specified
 682                    cfg */
 683                 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
 684                                              HostCmd_ACT_GEN_SET, 0,
 685                                              scan_cfg_out);
 686                 if (ret)
 687                         break;
 688         }
 689
 690         if (ret)
 691                 return -1;
 692
 693         return 0;
 694 }
 695
 696 /*
 697  * This function constructs a scan command configuration structure to use
 698  * in scan commands.
 699  *
 700  * Application layer or other functions can invoke network scanning
 701  * with a scan configuration supplied in a user scan configuration structure.
 702  * This structure is used as the basis of one or many scan command configuration
 703  * commands that are sent to the command processing module and eventually to the
 704  * firmware.
 705  *
 706  * This function creates a scan command configuration structure  based on the
 707  * following user supplied parameters (if present):
 708  *      - SSID filter
 709  *      - BSSID filter
 710  *      - Number of Probes to be sent
 711  *      - Channel list
 712  *
 713  * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
 714  * If the number of probes is not set, adapter default setting is used.
 715  */
 716 static void
 717 mwifiex_config_scan(struct mwifiex_private *priv,
 718                     const struct mwifiex_user_scan_cfg *user_scan_in,
 719                     struct mwifiex_scan_cmd_config *scan_cfg_out,
 720                     struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
 721                     struct mwifiex_chan_scan_param_set *scan_chan_list,
 722                     u8 *max_chan_per_scan, u8 *filtered_scan,
 723                     u8 *scan_current_only)
 724 {
 725         struct mwifiex_adapter *adapter = priv->adapter;
 726         struct mwifiex_ie_types_num_probes *num_probes_tlv;
 727         struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
 728         struct mwifiex_ie_types_rates_param_set *rates_tlv;
 729         const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
 730         u8 *tlv_pos;
 731         u32 num_probes;
 732         u32 ssid_len;
 733         u32 chan_idx;
 734         u32 chan_num;
 735         u32 scan_type;
 736         u16 scan_dur;
 737         u8 channel;
 738         u8 radio_type;
 739         int i;
 740         u8 ssid_filter;
 741         u8 rates[MWIFIEX_SUPPORTED_RATES];
 742         u32 rates_size;
 743         struct mwifiex_ie_types_htcap *ht_cap;
 744
 745         /* The tlv_buf_len is calculated for each scan command.  The TLVs added
 746            in this routine will be preserved since the routine that sends the
 747            command will append channelTLVs at *chan_list_out.  The difference
 748            between the *chan_list_out and the tlv_buf start will be used to
 749            calculate the size of anything we add in this routine. */
 750         scan_cfg_out->tlv_buf_len = 0;
 751
 752         /* Running tlv pointer.  Assigned to chan_list_out at end of function
 753            so later routines know where channels can be added to the command
 754            buf */
 755         tlv_pos = scan_cfg_out->tlv_buf;
 756
 757         /* Initialize the scan as un-filtered; the flag is later set to TRUE
 758            below if a SSID or BSSID filter is sent in the command */
 759         *filtered_scan = false;
 760
 761         /* Initialize the scan as not being only on the current channel.  If
 762            the channel list is customized, only contains one channel, and is
 763            the active channel, this is set true and data flow is not halted. */
 764         *scan_current_only = false;
 765
 766         if (user_scan_in) {
 767
 768                 /* Default the ssid_filter flag to TRUE, set false under
 769                    certain wildcard conditions and qualified by the existence
 770                    of an SSID list before marking the scan as filtered */
 771                 ssid_filter = true;
 772
 773                 /* Set the BSS type scan filter, use Adapter setting if
 774                    unset */
 775                 scan_cfg_out->bss_mode =
 776                         (user_scan_in->bss_mode ? (u8) user_scan_in->
 777                          bss_mode : (u8) adapter->scan_mode);
 778
 779                 /* Set the number of probes to send, use Adapter setting
 780                    if unset */
 781                 num_probes =
 782                         (user_scan_in->num_probes ? user_scan_in->
 783                          num_probes : adapter->scan_probes);
 784
 785                 /*
 786                  * Set the BSSID filter to the incoming configuration,
 787                  * if non-zero.  If not set, it will remain disabled
 788                  * (all zeros).
 789                  */
 790                 memcpy(scan_cfg_out->specific_bssid,
 791                        user_scan_in->specific_bssid,
 792                        sizeof(scan_cfg_out->specific_bssid));
 793
 794                 for (i = 0; i < user_scan_in->num_ssids; i++) {
 795                         ssid_len = user_scan_in->ssid_list[i].ssid_len;
 796
 797                         wildcard_ssid_tlv =
 798                                 (struct mwifiex_ie_types_wildcard_ssid_params *)
 799                                 tlv_pos;
 800                         wildcard_ssid_tlv->header.type =
 801                                 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
 802                         wildcard_ssid_tlv->header.len = cpu_to_le16(
 803                                 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
 804                                                          max_ssid_length)));
 805
 806                         /*
 807                          * max_ssid_length = 0 tells firmware to perform
 808                          * specific scan for the SSID filled, whereas
 809                          * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
 810                          * wildcard scan.
 811                          */
 812                         if (ssid_len)
 813                                 wildcard_ssid_tlv->max_ssid_length = 0;
 814                         else
 815                                 wildcard_ssid_tlv->max_ssid_length =
 816                                                         IEEE80211_MAX_SSID_LEN;
 817
 818                         memcpy(wildcard_ssid_tlv->ssid,
 819                                user_scan_in->ssid_list[i].ssid, ssid_len);
 820
 821                         tlv_pos += (sizeof(wildcard_ssid_tlv->header)
 822                                 + le16_to_cpu(wildcard_ssid_tlv->header.len));
 823
 824                         dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
 825                                 i, wildcard_ssid_tlv->ssid,
 826                                 wildcard_ssid_tlv->max_ssid_length);
 827
 828                         /* Empty wildcard ssid with a maxlen will match many or
 829                            potentially all SSIDs (maxlen == 32), therefore do
 830                            not treat the scan as
 831                            filtered. */
 832                         if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
 833                                 ssid_filter = false;
 834                 }
 835
 836                 /*
 837                  *  The default number of channels sent in the command is low to
 838                  *  ensure the response buffer from the firmware does not
 839                  *  truncate scan results.  That is not an issue with an SSID
 840                  *  or BSSID filter applied to the scan results in the firmware.
 841                  */
 842                 if ((i && ssid_filter) ||
 843                     memcmp(scan_cfg_out->specific_bssid, &zero_mac,
 844                            sizeof(zero_mac)))
 845                         *filtered_scan = true;
 846         } else {
 847                 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
 848                 num_probes = adapter->scan_probes;
 849         }
 850
 851         /*
 852          *  If a specific BSSID or SSID is used, the number of channels in the
 853          *  scan command will be increased to the absolute maximum.
 854          */
 855         if (*filtered_scan)
 856                 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
 857         else
 858                 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
 859
 860         /* If the input config or adapter has the number of Probes set,
 861            add tlv */
 862         if (num_probes) {
 863
 864                 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
 865                         num_probes);
 866
 867                 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
 868                 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
 869                 num_probes_tlv->header.len =
 870                         cpu_to_le16(sizeof(num_probes_tlv->num_probes));
 871                 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
 872
 873                 tlv_pos += sizeof(num_probes_tlv->header) +
 874                         le16_to_cpu(num_probes_tlv->header.len);
 875
 876         }
 877
 878         /* Append rates tlv */
 879         memset(rates, 0, sizeof(rates));
 880
 881         rates_size = mwifiex_get_supported_rates(priv, rates);
 882
 883         rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
 884         rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
 885         rates_tlv->header.len = cpu_to_le16((u16) rates_size);
 886         memcpy(rates_tlv->rates, rates, rates_size);
 887         tlv_pos += sizeof(rates_tlv->header) + rates_size;
 888
 889         dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
 890
 891         if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
 892             (priv->adapter->config_bands & BAND_GN ||
 893              priv->adapter->config_bands & BAND_AN)) {
 894                 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
 895                 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
 896                 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
 897                 ht_cap->header.len =
 898                                 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
 899                 radio_type =
 900                         mwifiex_band_to_radio_type(priv->adapter->config_bands);
 901                 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
 902                 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
 903         }
 904
 905         /* Append vendor specific IE TLV */
 906         mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
 907
 908         /*
 909          * Set the output for the channel TLV to the address in the tlv buffer
 910          *   past any TLVs that were added in this function (SSID, num_probes).
 911          *   Channel TLVs will be added past this for each scan command,
 912          *   preserving the TLVs that were previously added.
 913          */
 914         *chan_list_out =
 915                 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
 916
 917         if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
 918
 919                 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
 920
 921                 for (chan_idx = 0;
 922                      chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
 923                      user_scan_in->chan_list[chan_idx].chan_number;
 924                      chan_idx++) {
 925
 926                         channel = user_scan_in->chan_list[chan_idx].chan_number;
 927                         (scan_chan_list + chan_idx)->chan_number = channel;
 928
 929                         radio_type =
 930                                 user_scan_in->chan_list[chan_idx].radio_type;
 931                         (scan_chan_list + chan_idx)->radio_type = radio_type;
 932
 933                         scan_type = user_scan_in->chan_list[chan_idx].scan_type;
 934
 935                         if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
 936                                 (scan_chan_list +
 937                                  chan_idx)->chan_scan_mode_bitmap
 938                                         |= MWIFIEX_PASSIVE_SCAN;
 939                         else
 940                                 (scan_chan_list +
 941                                  chan_idx)->chan_scan_mode_bitmap
 942                                         &= ~MWIFIEX_PASSIVE_SCAN;
 943
 944                         if (user_scan_in->chan_list[chan_idx].scan_time) {
 945                                 scan_dur = (u16) user_scan_in->
 946                                         chan_list[chan_idx].scan_time;
 947                         } else {
 948                                 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
 949                                         scan_dur = adapter->passive_scan_time;
 950                                 else if (*filtered_scan)
 951                                         scan_dur = adapter->specific_scan_time;
 952                                 else
 953                                         scan_dur = adapter->active_scan_time;
 954                         }
 955
 956                         (scan_chan_list + chan_idx)->min_scan_time =
 957                                 cpu_to_le16(scan_dur);
 958                         (scan_chan_list + chan_idx)->max_scan_time =
 959                                 cpu_to_le16(scan_dur);
 960                 }
 961
 962                 /* Check if we are only scanning the current channel */
 963                 if ((chan_idx == 1) &&
 964                     (user_scan_in->chan_list[0].chan_number ==
 965                      priv->curr_bss_params.bss_descriptor.channel)) {
 966                         *scan_current_only = true;
 967                         dev_dbg(adapter->dev,
 968                                 "info: Scan: Scanning current channel only\n");
 969                 }
 970                 chan_num = chan_idx;
 971         } else {
 972                 dev_dbg(adapter->dev,
 973                         "info: Scan: Creating full region channel list\n");
 974                 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
 975                                                             scan_chan_list,
 976                                                             *filtered_scan);
 977         }
 978
 979         /*
 980          * In associated state we will reduce the number of channels scanned per
 981          * scan command to avoid any traffic delay/loss. This number is decided
 982          * based on total number of channels to be scanned due to constraints
 983          * of command buffers.
 984          */
 985         if (priv->media_connected) {
 986                 if (chan_num < MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD)
 987                         *max_chan_per_scan = 1;
 988                 else if (chan_num < MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD)
 989                         *max_chan_per_scan = 2;
 990                 else if (chan_num < MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD)
 991                         *max_chan_per_scan = 3;
 992                 else
 993                         *max_chan_per_scan = 4;
 994         }
 995 }
 996
 997 /*
 998  * This function inspects the scan response buffer for pointers to
 999  * expected TLVs.
1000  *
1001  * TLVs can be included at the end of the scan response BSS information.
1002  *
1003  * Data in the buffer is parsed pointers to TLVs that can potentially
1004  * be passed back in the response.
1005  */
1006 static void
1007 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1008                                      struct mwifiex_ie_types_data *tlv,
1009                                      u32 tlv_buf_size, u32 req_tlv_type,
1010                                      struct mwifiex_ie_types_data **tlv_data)
1011 {
1012         struct mwifiex_ie_types_data *current_tlv;
1013         u32 tlv_buf_left;
1014         u32 tlv_type;
1015         u32 tlv_len;
1016
1017         current_tlv = tlv;
1018         tlv_buf_left = tlv_buf_size;
1019         *tlv_data = NULL;
1020
1021         dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1022                 tlv_buf_size);
1023
1024         while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1025
1026                 tlv_type = le16_to_cpu(current_tlv->header.type);
1027                 tlv_len = le16_to_cpu(current_tlv->header.len);
1028
1029                 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1030                         dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1031                         break;
1032                 }
1033
1034                 if (req_tlv_type == tlv_type) {
1035                         switch (tlv_type) {
1036                         case TLV_TYPE_TSFTIMESTAMP:
1037                                 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1038                                         "timestamp TLV, len = %d\n", tlv_len);
1039                                 *tlv_data = (struct mwifiex_ie_types_data *)
1040                                         current_tlv;
1041                                 break;
1042                         case TLV_TYPE_CHANNELBANDLIST:
1043                                 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1044                                         " band list TLV, len = %d\n", tlv_len);
1045                                 *tlv_data = (struct mwifiex_ie_types_data *)
1046                                         current_tlv;
1047                                 break;
1048                         default:
1049                                 dev_err(adapter->dev,
1050                                         "SCAN_RESP: unhandled TLV = %d\n",
1051                                        tlv_type);
1052                                 /* Give up, this seems corrupted */
1053                                 return;
1054                         }
1055                 }
1056
1057                 if (*tlv_data)
1058                         break;
1059
1060
1061                 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1062                 current_tlv =
1063                         (struct mwifiex_ie_types_data *) (current_tlv->data +
1064                                                           tlv_len);
1065
1066         }                       /* while */
1067 }
1068
1069 /*
1070  * This function parses provided beacon buffer and updates
1071  * respective fields in bss descriptor structure.
1072  */
1073 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1074                                     struct mwifiex_bssdescriptor *bss_entry)
1075 {
1076         int ret = 0;
1077         u8 element_id;
1078         struct ieee_types_fh_param_set *fh_param_set;
1079         struct ieee_types_ds_param_set *ds_param_set;
1080         struct ieee_types_cf_param_set *cf_param_set;
1081         struct ieee_types_ibss_param_set *ibss_param_set;
1082         u8 *current_ptr;
1083         u8 *rate;
1084         u8 element_len;
1085         u16 total_ie_len;
1086         u8 bytes_to_copy;
1087         u8 rate_size;
1088         u8 found_data_rate_ie;
1089         u32 bytes_left;
1090         struct ieee_types_vendor_specific *vendor_ie;
1091         const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1092         const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1093
1094         found_data_rate_ie = false;
1095         rate_size = 0;
1096         current_ptr = bss_entry->beacon_buf;
1097         bytes_left = bss_entry->beacon_buf_size;
1098
1099         /* Process variable IE */
1100         while (bytes_left >= 2) {
1101                 element_id = *current_ptr;
1102                 element_len = *(current_ptr + 1);
1103                 total_ie_len = element_len + sizeof(struct ieee_types_header);
1104
1105                 if (bytes_left < total_ie_len) {
1106                         dev_err(adapter->dev, "err: InterpretIE: in processing"
1107                                 " IE, bytes left < IE length\n");
1108                         return -1;
1109                 }
1110                 switch (element_id) {
1111                 case WLAN_EID_SSID:
1112                         bss_entry->ssid.ssid_len = element_len;
1113                         memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1114                                element_len);
1115                         dev_dbg(adapter->dev,
1116                                 "info: InterpretIE: ssid: %-32s\n",
1117                                 bss_entry->ssid.ssid);
1118                         break;
1119
1120                 case WLAN_EID_SUPP_RATES:
1121                         memcpy(bss_entry->data_rates, current_ptr + 2,
1122                                element_len);
1123                         memcpy(bss_entry->supported_rates, current_ptr + 2,
1124                                element_len);
1125                         rate_size = element_len;
1126                         found_data_rate_ie = true;
1127                         break;
1128
1129                 case WLAN_EID_FH_PARAMS:
1130                         fh_param_set =
1131                                 (struct ieee_types_fh_param_set *) current_ptr;
1132                         memcpy(&bss_entry->phy_param_set.fh_param_set,
1133                                fh_param_set,
1134                                sizeof(struct ieee_types_fh_param_set));
1135                         break;
1136
1137                 case WLAN_EID_DS_PARAMS:
1138                         ds_param_set =
1139                                 (struct ieee_types_ds_param_set *) current_ptr;
1140
1141                         bss_entry->channel = ds_param_set->current_chan;
1142
1143                         memcpy(&bss_entry->phy_param_set.ds_param_set,
1144                                ds_param_set,
1145                                sizeof(struct ieee_types_ds_param_set));
1146                         break;
1147
1148                 case WLAN_EID_CF_PARAMS:
1149                         cf_param_set =
1150                                 (struct ieee_types_cf_param_set *) current_ptr;
1151                         memcpy(&bss_entry->ss_param_set.cf_param_set,
1152                                cf_param_set,
1153                                sizeof(struct ieee_types_cf_param_set));
1154                         break;
1155
1156                 case WLAN_EID_IBSS_PARAMS:
1157                         ibss_param_set =
1158                                 (struct ieee_types_ibss_param_set *)
1159                                 current_ptr;
1160                         memcpy(&bss_entry->ss_param_set.ibss_param_set,
1161                                ibss_param_set,
1162                                sizeof(struct ieee_types_ibss_param_set));
1163                         break;
1164
1165                 case WLAN_EID_ERP_INFO:
1166                         bss_entry->erp_flags = *(current_ptr + 2);
1167                         break;
1168
1169                 case WLAN_EID_EXT_SUPP_RATES:
1170                         /*
1171                          * Only process extended supported rate
1172                          * if data rate is already found.
1173                          * Data rate IE should come before
1174                          * extended supported rate IE
1175                          */
1176                         if (found_data_rate_ie) {
1177                                 if ((element_len + rate_size) >
1178                                     MWIFIEX_SUPPORTED_RATES)
1179                                         bytes_to_copy =
1180                                                 (MWIFIEX_SUPPORTED_RATES -
1181                                                  rate_size);
1182                                 else
1183                                         bytes_to_copy = element_len;
1184
1185                                 rate = (u8 *) bss_entry->data_rates;
1186                                 rate += rate_size;
1187                                 memcpy(rate, current_ptr + 2, bytes_to_copy);
1188
1189                                 rate = (u8 *) bss_entry->supported_rates;
1190                                 rate += rate_size;
1191                                 memcpy(rate, current_ptr + 2, bytes_to_copy);
1192                         }
1193                         break;
1194
1195                 case WLAN_EID_VENDOR_SPECIFIC:
1196                         vendor_ie = (struct ieee_types_vendor_specific *)
1197                                         current_ptr;
1198
1199                         if (!memcmp
1200                             (vendor_ie->vend_hdr.oui, wpa_oui,
1201                              sizeof(wpa_oui))) {
1202                                 bss_entry->bcn_wpa_ie =
1203                                         (struct ieee_types_vendor_specific *)
1204                                         current_ptr;
1205                                 bss_entry->wpa_offset = (u16)
1206                                         (current_ptr - bss_entry->beacon_buf);
1207                         } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1208                                     sizeof(wmm_oui))) {
1209                                 if (total_ie_len ==
1210                                     sizeof(struct ieee_types_wmm_parameter) ||
1211                                     total_ie_len ==
1212                                     sizeof(struct ieee_types_wmm_info))
1213                                         /*
1214                                          * Only accept and copy the WMM IE if
1215                                          * it matches the size expected for the
1216                                          * WMM Info IE or the WMM Parameter IE.
1217                                          */
1218                                         memcpy((u8 *) &bss_entry->wmm_ie,
1219                                                current_ptr, total_ie_len);
1220                         }
1221                         break;
1222                 case WLAN_EID_RSN:
1223                         bss_entry->bcn_rsn_ie =
1224                                 (struct ieee_types_generic *) current_ptr;
1225                         bss_entry->rsn_offset = (u16) (current_ptr -
1226                                                         bss_entry->beacon_buf);
1227                         break;
1228                 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1229                         bss_entry->bcn_wapi_ie =
1230                                 (struct ieee_types_generic *) current_ptr;
1231                         bss_entry->wapi_offset = (u16) (current_ptr -
1232                                                         bss_entry->beacon_buf);
1233                         break;
1234                 case WLAN_EID_HT_CAPABILITY:
1235                         bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1236                                         (current_ptr +
1237                                         sizeof(struct ieee_types_header));
1238                         bss_entry->ht_cap_offset = (u16) (current_ptr +
1239                                         sizeof(struct ieee_types_header) -
1240                                         bss_entry->beacon_buf);
1241                         break;
1242                 case WLAN_EID_HT_INFORMATION:
1243                         bss_entry->bcn_ht_info = (struct ieee80211_ht_info *)
1244                                         (current_ptr +
1245                                         sizeof(struct ieee_types_header));
1246                         bss_entry->ht_info_offset = (u16) (current_ptr +
1247                                         sizeof(struct ieee_types_header) -
1248                                         bss_entry->beacon_buf);
1249                         break;
1250                 case WLAN_EID_BSS_COEX_2040:
1251                         bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr +
1252                                         sizeof(struct ieee_types_header));
1253                         bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1254                                         sizeof(struct ieee_types_header) -
1255                                                 bss_entry->beacon_buf);
1256                         break;
1257                 case WLAN_EID_EXT_CAPABILITY:
1258                         bss_entry->bcn_ext_cap = (u8 *) (current_ptr +
1259                                         sizeof(struct ieee_types_header));
1260                         bss_entry->ext_cap_offset = (u16) (current_ptr +
1261                                         sizeof(struct ieee_types_header) -
1262                                         bss_entry->beacon_buf);
1263                         break;
1264                 default:
1265                         break;
1266                 }
1267
1268                 current_ptr += element_len + 2;
1269
1270                 /* Need to account for IE ID and IE Len */
1271                 bytes_left -= (element_len + 2);
1272
1273         }       /* while (bytes_left > 2) */
1274         return ret;
1275 }
1276
1277 /*
1278  * This function converts radio type scan parameter to a band configuration
1279  * to be used in join command.
1280  */
1281 static u8
1282 mwifiex_radio_type_to_band(u8 radio_type)
1283 {
1284         switch (radio_type) {
1285         case HostCmd_SCAN_RADIO_TYPE_A:
1286                 return BAND_A;
1287         case HostCmd_SCAN_RADIO_TYPE_BG:
1288         default:
1289                 return BAND_G;
1290         }
1291 }
1292
1293 /*
1294  * This is an internal function used to start a scan based on an input
1295  * configuration.
1296  *
1297  * This uses the input user scan configuration information when provided in
1298  * order to send the appropriate scan commands to firmware to populate or
1299  * update the internal driver scan table.
1300  */
1301 int mwifiex_scan_networks(struct mwifiex_private *priv,
1302                           const struct mwifiex_user_scan_cfg *user_scan_in)
1303 {
1304         int ret;
1305         struct mwifiex_adapter *adapter = priv->adapter;
1306         struct cmd_ctrl_node *cmd_node;
1307         union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1308         struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1309         u32 buf_size;
1310         struct mwifiex_chan_scan_param_set *scan_chan_list;
1311         u8 filtered_scan;
1312         u8 scan_current_chan_only;
1313         u8 max_chan_per_scan;
1314         unsigned long flags;
1315
1316         if (adapter->scan_processing) {
1317                 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1318                 return -EBUSY;
1319         }
1320
1321         if (priv->scan_block) {
1322                 dev_err(adapter->dev,
1323                         "cmd: Scan is blocked during association...\n");
1324                 return -EBUSY;
1325         }
1326
1327         spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1328         adapter->scan_processing = true;
1329         spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1330
1331         scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1332                                                                 GFP_KERNEL);
1333         if (!scan_cfg_out) {
1334                 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
1335                 ret = -ENOMEM;
1336                 goto done;
1337         }
1338
1339         buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
1340                                                 MWIFIEX_USER_SCAN_CHAN_MAX;
1341         scan_chan_list = kzalloc(buf_size, GFP_KERNEL);
1342         if (!scan_chan_list) {
1343                 dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
1344                 kfree(scan_cfg_out);
1345                 ret = -ENOMEM;
1346                 goto done;
1347         }
1348
1349         mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1350                             &chan_list_out, scan_chan_list, &max_chan_per_scan,
1351                             &filtered_scan, &scan_current_chan_only);
1352
1353         ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1354                                         &scan_cfg_out->config, chan_list_out,
1355                                         scan_chan_list);
1356
1357         /* Get scan command from scan_pending_q and put to cmd_pending_q */
1358         if (!ret) {
1359                 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1360                 if (!list_empty(&adapter->scan_pending_q)) {
1361                         cmd_node = list_first_entry(&adapter->scan_pending_q,
1362                                                     struct cmd_ctrl_node, list);
1363                         list_del(&cmd_node->list);
1364                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1365                                                flags);
1366                         adapter->cmd_queued = cmd_node;
1367                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1368                                                         true);
1369                         queue_work(adapter->workqueue, &adapter->main_work);
1370                 } else {
1371                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1372                                                flags);
1373                 }
1374         }
1375
1376         kfree(scan_cfg_out);
1377         kfree(scan_chan_list);
1378 done:
1379         if (ret) {
1380                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1381                 adapter->scan_processing = false;
1382                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1383         }
1384         return ret;
1385 }
1386
1387 /*
1388  * This function prepares a scan command to be sent to the firmware.
1389  *
1390  * This uses the scan command configuration sent to the command processing
1391  * module in command preparation stage to configure a scan command structure
1392  * to send to firmware.
1393  *
1394  * The fixed fields specifying the BSS type and BSSID filters as well as a
1395  * variable number/length of TLVs are sent in the command to firmware.
1396  *
1397  * Preparation also includes -
1398  *      - Setting command ID, and proper size
1399  *      - Ensuring correct endian-ness
1400  */
1401 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1402                             struct mwifiex_scan_cmd_config *scan_cfg)
1403 {
1404         struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1405
1406         /* Set fixed field variables in scan command */
1407         scan_cmd->bss_mode = scan_cfg->bss_mode;
1408         memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1409                sizeof(scan_cmd->bssid));
1410         memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1411
1412         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1413
1414         /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1415         cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1416                                           + sizeof(scan_cmd->bssid)
1417                                           + scan_cfg->tlv_buf_len + S_DS_GEN));
1418
1419         return 0;
1420 }
1421
1422 /*
1423  * This function checks compatibility of requested network with current
1424  * driver settings.
1425  */
1426 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1427                                         struct mwifiex_bssdescriptor *bss_desc)
1428 {
1429         int ret = -1;
1430
1431         if (!bss_desc)
1432                 return -1;
1433
1434         if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1435                              (u16) bss_desc->channel, 0))) {
1436                 switch (priv->bss_mode) {
1437                 case NL80211_IFTYPE_STATION:
1438                 case NL80211_IFTYPE_ADHOC:
1439                         ret = mwifiex_is_network_compatible(priv, bss_desc,
1440                                                             priv->bss_mode);
1441                         if (ret)
1442                                 dev_err(priv->adapter->dev,
1443                                         "Incompatible network settings\n");
1444                                 break;
1445                 default:
1446                                 ret = 0;
1447                 }
1448         }
1449
1450         return ret;
1451 }
1452
1453 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1454                                           struct cfg80211_bss *bss)
1455 {
1456         struct mwifiex_bssdescriptor *bss_desc;
1457         int ret;
1458         unsigned long flags;
1459
1460         /* Allocate and fill new bss descriptor */
1461         bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
1462                         GFP_KERNEL);
1463         if (!bss_desc) {
1464                 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
1465                 return -ENOMEM;
1466         }
1467
1468         ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1469         if (ret)
1470                 goto done;
1471
1472         ret = mwifiex_check_network_compatibility(priv, bss_desc);
1473         if (ret)
1474                 goto done;
1475
1476         /* Update current bss descriptor parameters */
1477         spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1478         priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL;
1479         priv->curr_bss_params.bss_descriptor.wpa_offset = 0;
1480         priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL;
1481         priv->curr_bss_params.bss_descriptor.rsn_offset = 0;
1482         priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL;
1483         priv->curr_bss_params.bss_descriptor.wapi_offset = 0;
1484         priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL;
1485         priv->curr_bss_params.bss_descriptor.ht_cap_offset =
1486                 0;
1487         priv->curr_bss_params.bss_descriptor.bcn_ht_info = NULL;
1488         priv->curr_bss_params.bss_descriptor.ht_info_offset =
1489                 0;
1490         priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 =
1491                 NULL;
1492         priv->curr_bss_params.bss_descriptor.
1493                 bss_co_2040_offset = 0;
1494         priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL;
1495         priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0;
1496         priv->curr_bss_params.bss_descriptor.beacon_buf = NULL;
1497         priv->curr_bss_params.bss_descriptor.beacon_buf_size =
1498                 0;
1499
1500         /* Make a copy of current BSSID descriptor */
1501         memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1502                sizeof(priv->curr_bss_params.bss_descriptor));
1503         mwifiex_save_curr_bcn(priv);
1504         spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1505
1506 done:
1507         kfree(bss_desc);
1508         return 0;
1509 }
1510
1511 /*
1512  * This function handles the command response of scan.
1513  *
1514  * The response buffer for the scan command has the following
1515  * memory layout:
1516  *
1517  *      .-------------------------------------------------------------.
1518  *      |  Header (4 * sizeof(t_u16)):  Standard command response hdr |
1519  *      .-------------------------------------------------------------.
1520  *      |  BufSize (t_u16) : sizeof the BSS Description data          |
1521  *      .-------------------------------------------------------------.
1522  *      |  NumOfSet (t_u8) : Number of BSS Descs returned             |
1523  *      .-------------------------------------------------------------.
1524  *      |  BSSDescription data (variable, size given in BufSize)      |
1525  *      .-------------------------------------------------------------.
1526  *      |  TLV data (variable, size calculated using Header->Size,    |
1527  *      |            BufSize and sizeof the fixed fields above)       |
1528  *      .-------------------------------------------------------------.
1529  */
1530 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1531                             struct host_cmd_ds_command *resp)
1532 {
1533         int ret = 0;
1534         struct mwifiex_adapter *adapter = priv->adapter;
1535         struct cmd_ctrl_node *cmd_node;
1536         struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1537         struct mwifiex_ie_types_data *tlv_data;
1538         struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1539         u8 *bss_info;
1540         u32 scan_resp_size;
1541         u32 bytes_left;
1542         u32 idx;
1543         u32 tlv_buf_size;
1544         struct mwifiex_chan_freq_power *cfp;
1545         struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1546         struct chan_band_param_set *chan_band;
1547         u8 is_bgscan_resp;
1548         unsigned long flags;
1549         struct cfg80211_bss *bss;
1550
1551         is_bgscan_resp = (le16_to_cpu(resp->command)
1552                           == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1553         if (is_bgscan_resp)
1554                 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1555         else
1556                 scan_rsp = &resp->params.scan_resp;
1557
1558
1559         if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1560                 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1561                         scan_rsp->number_of_sets);
1562                 ret = -1;
1563                 goto done;
1564         }
1565
1566         bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1567         dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1568                 bytes_left);
1569
1570         scan_resp_size = le16_to_cpu(resp->size);
1571
1572         dev_dbg(adapter->dev,
1573                 "info: SCAN_RESP: returned %d APs before parsing\n",
1574                 scan_rsp->number_of_sets);
1575
1576         bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1577
1578         /*
1579          * The size of the TLV buffer is equal to the entire command response
1580          *   size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1581          *   BSS Descriptions (bss_descript_size as bytesLef) and the command
1582          *   response header (S_DS_GEN)
1583          */
1584         tlv_buf_size = scan_resp_size - (bytes_left
1585                                          + sizeof(scan_rsp->bss_descript_size)
1586                                          + sizeof(scan_rsp->number_of_sets)
1587                                          + S_DS_GEN);
1588
1589         tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1590                                                  bss_desc_and_tlv_buffer +
1591                                                  bytes_left);
1592
1593         /* Search the TLV buffer space in the scan response for any valid
1594            TLVs */
1595         mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1596                                              TLV_TYPE_TSFTIMESTAMP,
1597                                              (struct mwifiex_ie_types_data **)
1598                                              &tsf_tlv);
1599
1600         /* Search the TLV buffer space in the scan response for any valid
1601            TLVs */
1602         mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1603                                              TLV_TYPE_CHANNELBANDLIST,
1604                                              (struct mwifiex_ie_types_data **)
1605                                              &chan_band_tlv);
1606
1607         for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1608                 u8 bssid[ETH_ALEN];
1609                 s32 rssi;
1610                 const u8 *ie_buf;
1611                 size_t ie_len;
1612                 u16 channel = 0;
1613                 u64 fw_tsf = 0;
1614                 u16 beacon_size = 0;
1615                 u32 curr_bcn_bytes;
1616                 u32 freq;
1617                 u16 beacon_period;
1618                 u16 cap_info_bitmap;
1619                 u8 *current_ptr;
1620                 u64 timestamp;
1621                 struct mwifiex_bcn_param *bcn_param;
1622                 struct mwifiex_bss_priv *bss_priv;
1623
1624                 if (bytes_left >= sizeof(beacon_size)) {
1625                         /* Extract & convert beacon size from command buffer */
1626                         memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1627                         bytes_left -= sizeof(beacon_size);
1628                         bss_info += sizeof(beacon_size);
1629                 }
1630
1631                 if (!beacon_size || beacon_size > bytes_left) {
1632                         bss_info += bytes_left;
1633                         bytes_left = 0;
1634                         return -1;
1635                 }
1636
1637                 /* Initialize the current working beacon pointer for this BSS
1638                  * iteration */
1639                 current_ptr = bss_info;
1640
1641                 /* Advance the return beacon pointer past the current beacon */
1642                 bss_info += beacon_size;
1643                 bytes_left -= beacon_size;
1644
1645                 curr_bcn_bytes = beacon_size;
1646
1647                 /*
1648                  * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1649                  *   and capability information
1650                  */
1651                 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1652                         dev_err(adapter->dev,
1653                                 "InterpretIE: not enough bytes left\n");
1654                         continue;
1655                 }
1656                 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1657                 current_ptr += sizeof(*bcn_param);
1658                 curr_bcn_bytes -= sizeof(*bcn_param);
1659
1660                 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1661
1662                 rssi = (s32) bcn_param->rssi;
1663                 rssi = (-rssi) * 100;           /* Convert dBm to mBm */
1664                 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
1665
1666                 timestamp = le64_to_cpu(bcn_param->timestamp);
1667                 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1668
1669                 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1670                 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1671                         cap_info_bitmap);
1672
1673                 /* Rest of the current buffer are IE's */
1674                 ie_buf = current_ptr;
1675                 ie_len = curr_bcn_bytes;
1676                 dev_dbg(adapter->dev,
1677                         "info: InterpretIE: IELength for this AP = %d\n",
1678                         curr_bcn_bytes);
1679
1680                 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1681                         u8 element_id, element_len;
1682
1683                         element_id = *current_ptr;
1684                         element_len = *(current_ptr + 1);
1685                         if (curr_bcn_bytes < element_len +
1686                                         sizeof(struct ieee_types_header)) {
1687                                 dev_err(priv->adapter->dev,
1688                                         "%s: bytes left < IE length\n",
1689                                         __func__);
1690                                 goto done;
1691                         }
1692                         if (element_id == WLAN_EID_DS_PARAMS) {
1693                                 channel = *(u8 *) (current_ptr +
1694                                         sizeof(struct ieee_types_header));
1695                                 break;
1696                         }
1697
1698                         current_ptr += element_len +
1699                                         sizeof(struct ieee_types_header);
1700                         curr_bcn_bytes -= element_len +
1701                                         sizeof(struct ieee_types_header);
1702                 }
1703
1704                 /*
1705                  * If the TSF TLV was appended to the scan results, save this
1706                  * entry's TSF value in the fw_tsf field. It is the firmware's
1707                  * TSF value at the time the beacon or probe response was
1708                  * received.
1709                  */
1710                 if (tsf_tlv)
1711                         memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1712                                sizeof(fw_tsf));
1713
1714                 if (channel) {
1715                         struct ieee80211_channel *chan;
1716                         u8 band;
1717
1718                         band = BAND_G;
1719                         if (chan_band_tlv) {
1720                                 chan_band =
1721                                         &chan_band_tlv->chan_band_param[idx];
1722                                 band = mwifiex_radio_type_to_band(
1723                                                 chan_band->radio_type
1724                                                 & (BIT(0) | BIT(1)));
1725                         }
1726
1727                         cfp = mwifiex_get_cfp(priv, band, channel, 0);
1728
1729                         freq = cfp ? cfp->freq : 0;
1730
1731                         chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1732
1733                         if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1734                                 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1735                                               chan, bssid, timestamp,
1736                                               cap_info_bitmap, beacon_period,
1737                                               ie_buf, ie_len, rssi, GFP_KERNEL);
1738                                 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1739                                 bss_priv->band = band;
1740                                 bss_priv->fw_tsf = fw_tsf;
1741                                 if (priv->media_connected &&
1742                                     !memcmp(bssid,
1743                                             priv->curr_bss_params.bss_descriptor
1744                                             .mac_address, ETH_ALEN))
1745                                         mwifiex_update_curr_bss_params(priv,
1746                                                                        bss);
1747                                 cfg80211_put_bss(bss);
1748                         }
1749                 } else {
1750                         dev_dbg(adapter->dev, "missing BSS channel IE\n");
1751                 }
1752         }
1753
1754         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1755         if (list_empty(&adapter->scan_pending_q)) {
1756                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1757                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1758                 adapter->scan_processing = false;
1759                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1760
1761                 /* Need to indicate IOCTL complete */
1762                 if (adapter->curr_cmd->wait_q_enabled) {
1763                         adapter->cmd_wait_q.status = 0;
1764                         mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1765                 }
1766                 if (priv->report_scan_result)
1767                         priv->report_scan_result = false;
1768                 if (priv->scan_pending_on_block) {
1769                         priv->scan_pending_on_block = false;
1770                         up(&priv->async_sem);
1771                 }
1772
1773                 if (priv->user_scan_cfg) {
1774                         dev_dbg(priv->adapter->dev,
1775                                 "info: %s: sending scan results\n", __func__);
1776                         cfg80211_scan_done(priv->scan_request, 0);
1777                         priv->scan_request = NULL;
1778                         kfree(priv->user_scan_cfg);
1779                         priv->user_scan_cfg = NULL;
1780                 }
1781         } else {
1782                 if (!mwifiex_wmm_lists_empty(adapter) &&
1783                     (priv->scan_request && (priv->scan_request->flags &
1784                                             CFG80211_SCAN_FLAG_TX_ABORT))) {
1785                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1786                                                flags);
1787                         adapter->scan_delay_cnt = 1;
1788                         mod_timer(&priv->scan_delay_timer, jiffies +
1789                                   msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
1790                         dev_dbg(priv->adapter->dev,
1791                                 "info: %s: deferring scan\n", __func__);
1792                 } else {
1793                         /* Get scan command from scan_pending_q and put to
1794                            cmd_pending_q */
1795                         cmd_node = list_first_entry(&adapter->scan_pending_q,
1796                                                     struct cmd_ctrl_node, list);
1797                         list_del(&cmd_node->list);
1798                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1799                                                flags);
1800                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1801                                                         true);
1802                 }
1803         }
1804
1805 done:
1806         return ret;
1807 }
1808
1809 /*
1810  * This function prepares command for background scan query.
1811  *
1812  * Preparation includes -
1813  *      - Setting command ID and proper size
1814  *      - Setting background scan flush parameter
1815  *      - Ensuring correct endian-ness
1816  */
1817 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
1818 {
1819         struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1820                 &cmd->params.bg_scan_query;
1821
1822         cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1823         cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1824                                 + S_DS_GEN);
1825
1826         bg_query->flush = 1;
1827
1828         return 0;
1829 }
1830
1831 /*
1832  * This function inserts scan command node to the scan pending queue.
1833  */
1834 void
1835 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1836                        struct cmd_ctrl_node *cmd_node)
1837 {
1838         struct mwifiex_adapter *adapter = priv->adapter;
1839         unsigned long flags;
1840
1841         cmd_node->wait_q_enabled = true;
1842         cmd_node->condition = &adapter->scan_wait_q_woken;
1843         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1844         list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1845         spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1846 }
1847
1848 /*
1849  * This function sends a scan command for all available channels to the
1850  * firmware, filtered on a specific SSID.
1851  */
1852 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
1853                                       struct cfg80211_ssid *req_ssid)
1854 {
1855         struct mwifiex_adapter *adapter = priv->adapter;
1856         int ret = 0;
1857         struct mwifiex_user_scan_cfg *scan_cfg;
1858
1859         if (!req_ssid)
1860                 return -1;
1861
1862         if (adapter->scan_processing) {
1863                 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1864                 return ret;
1865         }
1866
1867         if (priv->scan_block) {
1868                 dev_dbg(adapter->dev,
1869                         "cmd: Scan is blocked during association...\n");
1870                 return ret;
1871         }
1872
1873         scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1874         if (!scan_cfg) {
1875                 dev_err(adapter->dev, "failed to alloc scan_cfg\n");
1876                 return -ENOMEM;
1877         }
1878
1879         scan_cfg->ssid_list = req_ssid;
1880         scan_cfg->num_ssids = 1;
1881
1882         ret = mwifiex_scan_networks(priv, scan_cfg);
1883
1884         kfree(scan_cfg);
1885         return ret;
1886 }
1887
1888 /*
1889  * Sends IOCTL request to start a scan.
1890  *
1891  * This function allocates the IOCTL request buffer, fills it
1892  * with requisite parameters and calls the IOCTL handler.
1893  *
1894  * Scan command can be issued for both normal scan and specific SSID
1895  * scan, depending upon whether an SSID is provided or not.
1896  */
1897 int mwifiex_request_scan(struct mwifiex_private *priv,
1898                          struct cfg80211_ssid *req_ssid)
1899 {
1900         int ret;
1901
1902         if (down_interruptible(&priv->async_sem)) {
1903                 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1904                         __func__);
1905                 return -1;
1906         }
1907         priv->scan_pending_on_block = true;
1908
1909         priv->adapter->scan_wait_q_woken = false;
1910
1911         if (req_ssid && req_ssid->ssid_len != 0)
1912                 /* Specific SSID scan */
1913                 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
1914         else
1915                 /* Normal scan */
1916                 ret = mwifiex_scan_networks(priv, NULL);
1917
1918         if (!ret)
1919                 ret = mwifiex_wait_queue_complete(priv->adapter);
1920
1921         if (ret == -1) {
1922                 priv->scan_pending_on_block = false;
1923                 up(&priv->async_sem);
1924         }
1925
1926         return ret;
1927 }
1928
1929 /*
1930  * This function appends the vendor specific IE TLV to a buffer.
1931  */
1932 int
1933 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1934                             u16 vsie_mask, u8 **buffer)
1935 {
1936         int id, ret_len = 0;
1937         struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1938
1939         if (!buffer)
1940                 return 0;
1941         if (!(*buffer))
1942                 return 0;
1943
1944         /*
1945          * Traverse through the saved vendor specific IE array and append
1946          * the selected(scan/assoc/adhoc) IE as TLV to the command
1947          */
1948         for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1949                 if (priv->vs_ie[id].mask & vsie_mask) {
1950                         vs_param_set =
1951                                 (struct mwifiex_ie_types_vendor_param_set *)
1952                                 *buffer;
1953                         vs_param_set->header.type =
1954                                 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
1955                         vs_param_set->header.len =
1956                                 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
1957                                 & 0x00FF) + 2);
1958                         memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
1959                                le16_to_cpu(vs_param_set->header.len));
1960                         *buffer += le16_to_cpu(vs_param_set->header.len) +
1961                                    sizeof(struct mwifiex_ie_types_header);
1962                         ret_len += le16_to_cpu(vs_param_set->header.len) +
1963                                    sizeof(struct mwifiex_ie_types_header);
1964                 }
1965         }
1966         return ret_len;
1967 }
1968
1969 /*
1970  * This function saves a beacon buffer of the current BSS descriptor.
1971  *
1972  * The current beacon buffer is saved so that it can be restored in the
1973  * following cases that makes the beacon buffer not to contain the current
1974  * ssid's beacon buffer.
1975  *      - The current ssid was not found somehow in the last scan.
1976  *      - The current ssid was the last entry of the scan table and overloaded.
1977  */
1978 void
1979 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
1980 {
1981         struct mwifiex_bssdescriptor *curr_bss =
1982                 &priv->curr_bss_params.bss_descriptor;
1983
1984         if (!curr_bss->beacon_buf_size)
1985                 return;
1986
1987         /* allocate beacon buffer at 1st time; or if it's size has changed */
1988         if (!priv->curr_bcn_buf ||
1989             priv->curr_bcn_size != curr_bss->beacon_buf_size) {
1990                 priv->curr_bcn_size = curr_bss->beacon_buf_size;
1991
1992                 kfree(priv->curr_bcn_buf);
1993                 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
1994                                              GFP_ATOMIC);
1995                 if (!priv->curr_bcn_buf) {
1996                         dev_err(priv->adapter->dev,
1997                                 "failed to alloc curr_bcn_buf\n");
1998                         return;
1999                 }
2000         }
2001
2002         memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
2003                curr_bss->beacon_buf_size);
2004         dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2005                 priv->curr_bcn_size);
2006
2007         curr_bss->beacon_buf = priv->curr_bcn_buf;
2008
2009         /* adjust the pointers in the current BSS descriptor */
2010         if (curr_bss->bcn_wpa_ie)
2011                 curr_bss->bcn_wpa_ie =
2012                         (struct ieee_types_vendor_specific *)
2013                         (curr_bss->beacon_buf +
2014                          curr_bss->wpa_offset);
2015
2016         if (curr_bss->bcn_rsn_ie)
2017                 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2018                         (curr_bss->beacon_buf +
2019                          curr_bss->rsn_offset);
2020
2021         if (curr_bss->bcn_ht_cap)
2022                 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2023                         (curr_bss->beacon_buf +
2024                          curr_bss->ht_cap_offset);
2025
2026         if (curr_bss->bcn_ht_info)
2027                 curr_bss->bcn_ht_info = (struct ieee80211_ht_info *)
2028                         (curr_bss->beacon_buf +
2029                          curr_bss->ht_info_offset);
2030
2031         if (curr_bss->bcn_bss_co_2040)
2032                 curr_bss->bcn_bss_co_2040 =
2033                         (u8 *) (curr_bss->beacon_buf +
2034                                         curr_bss->bss_co_2040_offset);
2035
2036         if (curr_bss->bcn_ext_cap)
2037                 curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf +
2038                                 curr_bss->ext_cap_offset);
2039 }
2040
2041 /*
2042  * This function frees the current BSS descriptor beacon buffer.
2043  */
2044 void
2045 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2046 {
2047         kfree(priv->curr_bcn_buf);
2048         priv->curr_bcn_buf = NULL;
2049 }