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mwifiex: correct channel stat buffer overflows
[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / marvell / mwifiex / scan.c
CommitLineData
5e6e3a92
BZ		 1/*
2 * Marvell Wireless LAN device driver: scan ioctl and command handling
3 *
65da33f5 4 * Copyright (C) 2011-2014, Marvell International Ltd.
5e6e3a92
BZ		 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
658f37b7 31#define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4
5e6e3a92
BZ		 32
33/* Memory needed to store a max sized Channel List TLV for a firmware scan */
34#define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
35 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
36 *sizeof(struct mwifiex_chan_scan_param_set)))
37
38/* Memory needed to store supported rate */
39#define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
40 + HOSTCMD_SUPPORTED_RATES)
41
42/* Memory needed to store a max number/size WildCard SSID TLV for a firmware
43 scan */
44#define WILDCARD_SSID_TLV_MAX_SIZE \
45 (MWIFIEX_MAX_SSID_LIST_LENGTH * \
46 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
47 + IEEE80211_MAX_SSID_LEN))
48
49/* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
50#define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
51 + sizeof(struct mwifiex_ie_types_num_probes) \
52 + sizeof(struct mwifiex_ie_types_htcap) \
53 + CHAN_TLV_MAX_SIZE \
54 + RATE_TLV_MAX_SIZE \
55 + WILDCARD_SSID_TLV_MAX_SIZE)
56
57
58union mwifiex_scan_cmd_config_tlv {
59 /* Scan configuration (variable length) */
60 struct mwifiex_scan_cmd_config config;
61 /* Max allocated block */
62 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
63};
64
65enum cipher_suite {
66 CIPHER_SUITE_TKIP,
67 CIPHER_SUITE_CCMP,
68 CIPHER_SUITE_MAX
69};
70static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
73};
74static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
77};
78
679b687b
AF		 79static void
80_dbg_security_flags(int log_level, const char *func, const char *desc,
81 struct mwifiex_private *priv,
82 struct mwifiex_bssdescriptor *bss_desc)
83{
84 _mwifiex_dbg(priv->adapter, log_level,
85 "info: %s: %s:\twpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\tEncMode=%#x privacy=%#x\n",
86 func, desc,
87 bss_desc->bcn_wpa_ie ?
88 bss_desc->bcn_wpa_ie->vend_hdr.element_id : 0,
89 bss_desc->bcn_rsn_ie ?
90 bss_desc->bcn_rsn_ie->ieee_hdr.element_id : 0,
91 priv->sec_info.wep_enabled ? "e" : "d",
92 priv->sec_info.wpa_enabled ? "e" : "d",
93 priv->sec_info.wpa2_enabled ? "e" : "d",
94 priv->sec_info.encryption_mode,
95 bss_desc->privacy);
96}
97#define dbg_security_flags(mask, desc, priv, bss_desc) \
98 _dbg_security_flags(MWIFIEX_DBG_##mask, desc, __func__, priv, bss_desc)
99
38329568
AF		 100static bool
101has_ieee_hdr(struct ieee_types_generic *ie, u8 key)
102{
103 return (ie && ie->ieee_hdr.element_id == key);
104}
105
106static bool
107has_vendor_hdr(struct ieee_types_vendor_specific *ie, u8 key)
108{
109 return (ie && ie->vend_hdr.element_id == key);
110}
111
5e6e3a92
BZ		 112/*
113 * This function parses a given IE for a given OUI.
114 *
115 * This is used to parse a WPA/RSN IE to find if it has
116 * a given oui in PTK.
117 */
118static u8
119mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
120{
121 u8 count;
122
123 count = iebody->ptk_cnt[0];
124
125 /* There could be multiple OUIs for PTK hence
126 1) Take the length.
127 2) Check all the OUIs for AES.
128 3) If one of them is AES then pass success. */
129 while (count) {
130 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
131 return MWIFIEX_OUI_PRESENT;
132
133 --count;
134 if (count)
135 iebody = (struct ie_body *) ((u8 *) iebody +
136 sizeof(iebody->ptk_body));
137 }
138
139 pr_debug("info: %s: OUI is not found in PTK\n", __func__);
140 return MWIFIEX_OUI_NOT_PRESENT;
141}
142
143/*
144 * This function checks if a given OUI is present in a RSN IE.
145 *
146 * The function first checks if a RSN IE is present or not in the
147 * BSS descriptor. It tries to locate the OUI only if such an IE is
148 * present.
149 */
150static u8
151mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
152{
270e58e8
YAP		 153 u8 *oui;
154 struct ie_body *iebody;
5e6e3a92
BZ		 155 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
156
38329568 157 if (has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) {
5e6e3a92
BZ		 158 iebody = (struct ie_body *)
159 (((u8 *) bss_desc->bcn_rsn_ie->data) +
cff23cec 160 RSN_GTK_OUI_OFFSET);
5e6e3a92
BZ		 161 oui = &mwifiex_rsn_oui[cipher][0];
162 ret = mwifiex_search_oui_in_ie(iebody, oui);
163 if (ret)
164 return ret;
165 }
166 return ret;
167}
168
169/*
170 * This function checks if a given OUI is present in a WPA IE.
171 *
172 * The function first checks if a WPA IE is present or not in the
173 * BSS descriptor. It tries to locate the OUI only if such an IE is
174 * present.
175 */
176static u8
177mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
178{
270e58e8
YAP		 179 u8 *oui;
180 struct ie_body *iebody;
5e6e3a92
BZ		 181 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
182
38329568 183 if (has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)) {
5e6e3a92
BZ		 184 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
185 oui = &mwifiex_wpa_oui[cipher][0];
186 ret = mwifiex_search_oui_in_ie(iebody, oui);
187 if (ret)
188 return ret;
189 }
190 return ret;
191}
192
193/*
194 * This function compares two SSIDs and checks if they match.
195 */
196s32
b9be5f39 197mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
5e6e3a92
BZ		 198{
199 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
200 return -1;
201 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
202}
203
5e6e3a92
BZ		 204/*
205 * This function checks if wapi is enabled in driver and scanned network is
206 * compatible with it.
207 */
208static bool
cff23cec
YAP		 209mwifiex_is_bss_wapi(struct mwifiex_private *priv,
210 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92
BZ		 211{
212 if (priv->sec_info.wapi_enabled &&
38329568 213 has_ieee_hdr(bss_desc->bcn_wapi_ie, WLAN_EID_BSS_AC_ACCESS_DELAY))
5e6e3a92 214 return true;
5e6e3a92
BZ		 215 return false;
216}
217
218/*
219 * This function checks if driver is configured with no security mode and
220 * scanned network is compatible with it.
221 */
222static bool
cff23cec
YAP		 223mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
224 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 225{
5eb02e44 226 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
0a233c98 227 !priv->sec_info.wpa2_enabled &&
38329568
AF		 228 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
229 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
cff23cec 230 !priv->sec_info.encryption_mode && !bss_desc->privacy) {
5e6e3a92
BZ		 231 return true;
232 }
233 return false;
234}
235
236/*
237 * This function checks if static WEP is enabled in driver and scanned network
238 * is compatible with it.
239 */
240static bool
cff23cec
YAP		 241mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
242 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 243{
5eb02e44
AK		 244 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
245 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
5e6e3a92
BZ		 246 return true;
247 }
248 return false;
249}
250
251/*
252 * This function checks if wpa is enabled in driver and scanned network is
253 * compatible with it.
254 */
255static bool
cff23cec
YAP		 256mwifiex_is_bss_wpa(struct mwifiex_private *priv,
257 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 258{
5eb02e44 259 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
0a233c98 260 !priv->sec_info.wpa2_enabled &&
38329568 261 has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)
5e6e3a92
BZ		 262 /*
263 * Privacy bit may NOT be set in some APs like
264 * LinkSys WRT54G && bss_desc->privacy
265 */
266 ) {
679b687b 267 dbg_security_flags(INFO, "WPA", priv, bss_desc);
5e6e3a92
BZ		 268 return true;
269 }
270 return false;
271}
272
273/*
274 * This function checks if wpa2 is enabled in driver and scanned network is
275 * compatible with it.
276 */
277static bool
cff23cec
YAP		 278mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
279 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 280{
0a233c98 281 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec 282 priv->sec_info.wpa2_enabled &&
38329568 283 has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) {
cff23cec
YAP		 284 /*
285 * Privacy bit may NOT be set in some APs like
286 * LinkSys WRT54G && bss_desc->privacy
287 */
679b687b 288 dbg_security_flags(INFO, "WAP2", priv, bss_desc);
5e6e3a92
BZ		 289 return true;
290 }
291 return false;
292}
293
294/*
295 * This function checks if adhoc AES is enabled in driver and scanned network is
296 * compatible with it.
297 */
298static bool
cff23cec
YAP		 299mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
300 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 301{
5eb02e44 302 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec 303 !priv->sec_info.wpa2_enabled &&
38329568
AF		 304 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
305 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
cff23cec 306 !priv->sec_info.encryption_mode && bss_desc->privacy) {
5e6e3a92
BZ		 307 return true;
308 }
309 return false;
310}
311
312/*
313 * This function checks if dynamic WEP is enabled in driver and scanned network
314 * is compatible with it.
315 */
316static bool
cff23cec
YAP		 317mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
318 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 319{
5eb02e44 320 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec 321 !priv->sec_info.wpa2_enabled &&
38329568
AF		 322 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
323 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
cff23cec 324 priv->sec_info.encryption_mode && bss_desc->privacy) {
679b687b 325 dbg_security_flags(INFO, "dynamic", priv, bss_desc);
5e6e3a92
BZ		 326 return true;
327 }
328 return false;
329}
330
331/*
332 * This function checks if a scanned network is compatible with the driver
333 * settings.
334 *
335 * WEP WPA WPA2 ad-hoc encrypt Network
336 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
337 * 0 0 0 0 NONE 0 0 0 yes No security
338 * 0 1 0 0 x 1x 1 x yes WPA (disable
339 * HT if no AES)
340 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
341 * HT if no AES)
342 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
343 * 1 0 0 0 NONE 1 0 0 yes Static WEP
344 * (disable HT)
345 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
346 *
347 * Compatibility is not matched while roaming, except for mode.
348 */
349static s32
7c6fa2a8
AK		 350mwifiex_is_network_compatible(struct mwifiex_private *priv,
351 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
5e6e3a92
BZ		 352{
353 struct mwifiex_adapter *adapter = priv->adapter;
5e6e3a92 354
5e6e3a92
BZ		 355 bss_desc->disable_11n = false;
356
357 /* Don't check for compatibility if roaming */
cff23cec
YAP		 358 if (priv->media_connected &&
359 (priv->bss_mode == NL80211_IFTYPE_STATION) &&
360 (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
7c6fa2a8 361 return 0;
5e6e3a92
BZ		 362
363 if (priv->wps.session_enable) {
acebe8c1
ZL		 364 mwifiex_dbg(adapter, IOCTL,
365 "info: return success directly in WPS period\n");
7c6fa2a8 366 return 0;
5e6e3a92
BZ		 367 }
368
2a7305c8 369 if (bss_desc->chan_sw_ie_present) {
acebe8c1
ZL		 370 mwifiex_dbg(adapter, INFO,
371 "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
2a7305c8
AK		 372 return -1;
373 }
374
cff23cec 375 if (mwifiex_is_bss_wapi(priv, bss_desc)) {
acebe8c1
ZL		 376 mwifiex_dbg(adapter, INFO,
377 "info: return success for WAPI AP\n");
7c6fa2a8 378 return 0;
5e6e3a92
BZ		 379 }
380
381 if (bss_desc->bss_mode == mode) {
cff23cec 382 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
5e6e3a92 383 /* No security */
7c6fa2a8 384 return 0;
cff23cec 385 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
5e6e3a92 386 /* Static WEP enabled */
acebe8c1
ZL		 387 mwifiex_dbg(adapter, INFO,
388 "info: Disable 11n in WEP mode.\n");
5e6e3a92 389 bss_desc->disable_11n = true;
7c6fa2a8 390 return 0;
cff23cec 391 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
5e6e3a92 392 /* WPA enabled */
cff23cec
YAP		 393 if (((priv->adapter->config_bands & BAND_GN ||
394 priv->adapter->config_bands & BAND_AN) &&
395 bss_desc->bcn_ht_cap) &&
396 !mwifiex_is_wpa_oui_present(bss_desc,
397 CIPHER_SUITE_CCMP)) {
398
399 if (mwifiex_is_wpa_oui_present
400 (bss_desc, CIPHER_SUITE_TKIP)) {
acebe8c1
ZL		 401 mwifiex_dbg(adapter, INFO,
402 "info: Disable 11n if AES\t"
403 "is not supported by AP\n");
5e6e3a92
BZ		 404 bss_desc->disable_11n = true;
405 } else {
406 return -1;
407 }
408 }
7c6fa2a8 409 return 0;
cff23cec 410 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
5e6e3a92 411 /* WPA2 enabled */
cff23cec
YAP		 412 if (((priv->adapter->config_bands & BAND_GN ||
413 priv->adapter->config_bands & BAND_AN) &&
414 bss_desc->bcn_ht_cap) &&
415 !mwifiex_is_rsn_oui_present(bss_desc,
416 CIPHER_SUITE_CCMP)) {
417
418 if (mwifiex_is_rsn_oui_present
419 (bss_desc, CIPHER_SUITE_TKIP)) {
acebe8c1
ZL		 420 mwifiex_dbg(adapter, INFO,
421 "info: Disable 11n if AES\t"
422 "is not supported by AP\n");
5e6e3a92
BZ		 423 bss_desc->disable_11n = true;
424 } else {
425 return -1;
426 }
427 }
7c6fa2a8 428 return 0;
cff23cec 429 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
5e6e3a92 430 /* Ad-hoc AES enabled */
7c6fa2a8 431 return 0;
cff23cec 432 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
5e6e3a92 433 /* Dynamic WEP enabled */
7c6fa2a8 434 return 0;
5e6e3a92
BZ		 435 }
436
437 /* Security doesn't match */
679b687b 438 dbg_security_flags(ERROR, "failed", priv, bss_desc);
5e6e3a92
BZ		 439 return -1;
440 }
441
442 /* Mode doesn't match */
443 return -1;
444}
445
5e6e3a92
BZ		 446/*
447 * This function creates a channel list for the driver to scan, based
448 * on region/band information.
449 *
450 * This routine is used for any scan that is not provided with a
451 * specific channel list to scan.
452 */
658f37b7 453static int
5e6e3a92 454mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
cff23cec
YAP		 455 const struct mwifiex_user_scan_cfg
456 *user_scan_in,
457 struct mwifiex_chan_scan_param_set
458 *scan_chan_list,
459 u8 filtered_scan)
5e6e3a92 460{
57fbcce3 461 enum nl80211_band band;
5e6e3a92
BZ		 462 struct ieee80211_supported_band *sband;
463 struct ieee80211_channel *ch;
464 struct mwifiex_adapter *adapter = priv->adapter;
465 int chan_idx = 0, i;
5e6e3a92 466
57fbcce3 467 for (band = 0; (band < NUM_NL80211_BANDS) ; band++) {
5e6e3a92 468
4facc34a 469 if (!priv->wdev.wiphy->bands[band])
5e6e3a92
BZ		 470 continue;
471
4facc34a 472 sband = priv->wdev.wiphy->bands[band];
5e6e3a92 473
d06b7b9e 474 for (i = 0; (i < sband->n_channels) ; i++) {
5e6e3a92
BZ		 475 ch = &sband->channels[i];
476 if (ch->flags & IEEE80211_CHAN_DISABLED)
477 continue;
478 scan_chan_list[chan_idx].radio_type = band;
186630c2 479
5e6e3a92 480 if (user_scan_in &&
cff23cec 481 user_scan_in->chan_list[0].scan_time)
5e6e3a92
BZ		 482 scan_chan_list[chan_idx].max_scan_time =
483 cpu_to_le16((u16) user_scan_in->
484 chan_list[0].scan_time);
8fe02e16 485 else if (ch->flags & IEEE80211_CHAN_NO_IR)
5e6e3a92
BZ		 486 scan_chan_list[chan_idx].max_scan_time =
487 cpu_to_le16(adapter->passive_scan_time);
488 else
489 scan_chan_list[chan_idx].max_scan_time =
490 cpu_to_le16(adapter->active_scan_time);
186630c2 491
8fe02e16 492 if (ch->flags & IEEE80211_CHAN_NO_IR)
5e6e3a92 493 scan_chan_list[chan_idx].chan_scan_mode_bitmap
2375fa2b 494 |= (MWIFIEX_PASSIVE_SCAN |
495 MWIFIEX_HIDDEN_SSID_REPORT);
5e6e3a92
BZ		 496 else
497 scan_chan_list[chan_idx].chan_scan_mode_bitmap
498 &= ~MWIFIEX_PASSIVE_SCAN;
499 scan_chan_list[chan_idx].chan_number =
500 (u32) ch->hw_value;
1b499cb7
AK		 501
502 scan_chan_list[chan_idx].chan_scan_mode_bitmap
503 |= MWIFIEX_DISABLE_CHAN_FILT;
504
5e6e3a92
BZ		 505 if (filtered_scan) {
506 scan_chan_list[chan_idx].max_scan_time =
507 cpu_to_le16(adapter->specific_scan_time);
5e6e3a92 508 }
d06b7b9e 509 chan_idx++;
5e6e3a92
BZ		 510 }
511
512 }
658f37b7 513 return chan_idx;
5e6e3a92
BZ		 514}
515
0c9b7f22
XH		 516/* This function creates a channel list tlv for bgscan config, based
517 * on region/band information.
518 */
519static int
520mwifiex_bgscan_create_channel_list(struct mwifiex_private *priv,
521 const struct mwifiex_bg_scan_cfg
522 *bgscan_cfg_in,
523 struct mwifiex_chan_scan_param_set
524 *scan_chan_list)
525{
57fbcce3 526 enum nl80211_band band;
0c9b7f22
XH		 527 struct ieee80211_supported_band *sband;
528 struct ieee80211_channel *ch;
529 struct mwifiex_adapter *adapter = priv->adapter;
530 int chan_idx = 0, i;
531
57fbcce3 532 for (band = 0; (band < NUM_NL80211_BANDS); band++) {
0c9b7f22
XH		 533 if (!priv->wdev.wiphy->bands[band])
534 continue;
535
536 sband = priv->wdev.wiphy->bands[band];
537
538 for (i = 0; (i < sband->n_channels) ; i++) {
539 ch = &sband->channels[i];
540 if (ch->flags & IEEE80211_CHAN_DISABLED)
541 continue;
542 scan_chan_list[chan_idx].radio_type = band;
543
544 if (bgscan_cfg_in->chan_list[0].scan_time)
545 scan_chan_list[chan_idx].max_scan_time =
546 cpu_to_le16((u16)bgscan_cfg_in->
547 chan_list[0].scan_time);
548 else if (ch->flags & IEEE80211_CHAN_NO_IR)
549 scan_chan_list[chan_idx].max_scan_time =
550 cpu_to_le16(adapter->passive_scan_time);
551 else
552 scan_chan_list[chan_idx].max_scan_time =
553 cpu_to_le16(adapter->
554 specific_scan_time);
555
556 if (ch->flags & IEEE80211_CHAN_NO_IR)
557 scan_chan_list[chan_idx].chan_scan_mode_bitmap
558 |= MWIFIEX_PASSIVE_SCAN;
559 else
560 scan_chan_list[chan_idx].chan_scan_mode_bitmap
561 &= ~MWIFIEX_PASSIVE_SCAN;
562
563 scan_chan_list[chan_idx].chan_number =
564 (u32)ch->hw_value;
565 chan_idx++;
566 }
567 }
568 return chan_idx;
569}
570
78dfca62
AP		 571/* This function appends rate TLV to scan config command. */
572static int
573mwifiex_append_rate_tlv(struct mwifiex_private *priv,
574 struct mwifiex_scan_cmd_config *scan_cfg_out,
575 u8 radio)
576{
577 struct mwifiex_ie_types_rates_param_set *rates_tlv;
578 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos;
579 u32 rates_size;
580
581 memset(rates, 0, sizeof(rates));
582
583 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len;
584
585 if (priv->scan_request)
586 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates,
587 radio);
588 else
589 rates_size = mwifiex_get_supported_rates(priv, rates);
590
acebe8c1
ZL		 591 mwifiex_dbg(priv->adapter, CMD,
592 "info: SCAN_CMD: Rates size = %d\n",
78dfca62
AP		 593 rates_size);
594 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos;
595 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
596 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
597 memcpy(rates_tlv->rates, rates, rates_size);
598 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size;
599
600 return rates_size;
601}
602
5e6e3a92
BZ		 603/*
604 * This function constructs and sends multiple scan config commands to
605 * the firmware.
606 *
607 * Previous routines in the code flow have created a scan command configuration
608 * with any requested TLVs. This function splits the channel TLV into maximum
609 * channels supported per scan lists and sends the portion of the channel TLV,
610 * along with the other TLVs, to the firmware.
611 */
612static int
600f5d90 613mwifiex_scan_channel_list(struct mwifiex_private *priv,
5e6e3a92
BZ		 614 u32 max_chan_per_scan, u8 filtered_scan,
615 struct mwifiex_scan_cmd_config *scan_cfg_out,
616 struct mwifiex_ie_types_chan_list_param_set
617 *chan_tlv_out,
618 struct mwifiex_chan_scan_param_set *scan_chan_list)
619{
1845bd3a 620 struct mwifiex_adapter *adapter = priv->adapter;
5e6e3a92
BZ		 621 int ret = 0;
622 struct mwifiex_chan_scan_param_set *tmp_chan_list;
623 struct mwifiex_chan_scan_param_set *start_chan;
21f58d20 624 u32 tlv_idx, rates_size, cmd_no;
5e6e3a92
BZ		 625 u32 total_scan_time;
626 u32 done_early;
78dfca62 627 u8 radio_type;
5e6e3a92
BZ		 628
629 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
acebe8c1
ZL		 630 mwifiex_dbg(priv->adapter, ERROR,
631 "info: Scan: Null detect: %p, %p, %p\n",
632 scan_cfg_out, chan_tlv_out, scan_chan_list);
5e6e3a92
BZ		 633 return -1;
634 }
635
b887664d
AK		 636 /* Check csa channel expiry before preparing scan list */
637 mwifiex_11h_get_csa_closed_channel(priv);
638
5e6e3a92
BZ		 639 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
640
641 /* Set the temp channel struct pointer to the start of the desired
642 list */
643 tmp_chan_list = scan_chan_list;
644
645 /* Loop through the desired channel list, sending a new firmware scan
646 commands for each max_chan_per_scan channels (or for 1,6,11
647 individually if configured accordingly) */
648 while (tmp_chan_list->chan_number) {
649
650 tlv_idx = 0;
651 total_scan_time = 0;
78dfca62 652 radio_type = 0;
5e6e3a92
BZ		 653 chan_tlv_out->header.len = 0;
654 start_chan = tmp_chan_list;
655 done_early = false;
656
657 /*
658 * Construct the Channel TLV for the scan command. Continue to
659 * insert channel TLVs until:
660 * - the tlv_idx hits the maximum configured per scan command
661 * - the next channel to insert is 0 (end of desired channel
662 * list)
663 * - done_early is set (controlling individual scanning of
664 * 1,6,11)
665 */
cff23cec
YAP		 666 while (tlv_idx < max_chan_per_scan &&
667 tmp_chan_list->chan_number && !done_early) {
5e6e3a92 668
b887664d
AK		 669 if (tmp_chan_list->chan_number == priv->csa_chan) {
670 tmp_chan_list++;
671 continue;
672 }
673
78dfca62 674 radio_type = tmp_chan_list->radio_type;
acebe8c1
ZL		 675 mwifiex_dbg(priv->adapter, INFO,
676 "info: Scan: Chan(%3d), Radio(%d),\t"
677 "Mode(%d, %d), Dur(%d)\n",
678 tmp_chan_list->chan_number,
679 tmp_chan_list->radio_type,
680 tmp_chan_list->chan_scan_mode_bitmap
681 & MWIFIEX_PASSIVE_SCAN,
682 (tmp_chan_list->chan_scan_mode_bitmap
683 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
684 le16_to_cpu(tmp_chan_list->max_scan_time));
5e6e3a92
BZ		 685
686 /* Copy the current channel TLV to the command being
687 prepared */
688 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
689 tmp_chan_list,
690 sizeof(chan_tlv_out->chan_scan_param));
691
692 /* Increment the TLV header length by the size
693 appended */
5653c646
DM		 694 le16_unaligned_add_cpu(&chan_tlv_out->header.len,
695 sizeof(
696 chan_tlv_out->chan_scan_param));
5e6e3a92
BZ		 697
698 /*
699 * The tlv buffer length is set to the number of bytes
700 * of the between the channel tlv pointer and the start
701 * of the tlv buffer. This compensates for any TLVs
702 * that were appended before the channel list.
703 */
704 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
705 scan_cfg_out->tlv_buf);
706
707 /* Add the size of the channel tlv header and the data
708 length */
709 scan_cfg_out->tlv_buf_len +=
710 (sizeof(chan_tlv_out->header)
711 + le16_to_cpu(chan_tlv_out->header.len));
712
713 /* Increment the index to the channel tlv we are
714 constructing */
715 tlv_idx++;
716
717 /* Count the total scan time per command */
718 total_scan_time +=
719 le16_to_cpu(tmp_chan_list->max_scan_time);
720
721 done_early = false;
722
723 /* Stop the loop if the *current* channel is in the
724 1,6,11 set and we are not filtering on a BSSID
725 or SSID. */
cff23cec
YAP		 726 if (!filtered_scan &&
727 (tmp_chan_list->chan_number == 1 ||
728 tmp_chan_list->chan_number == 6 ||
729 tmp_chan_list->chan_number == 11))
5e6e3a92
BZ		 730 done_early = true;
731
732 /* Increment the tmp pointer to the next channel to
733 be scanned */
734 tmp_chan_list++;
735
736 /* Stop the loop if the *next* channel is in the 1,6,11
737 set. This will cause it to be the only channel
738 scanned on the next interation */
cff23cec
YAP		 739 if (!filtered_scan &&
740 (tmp_chan_list->chan_number == 1 ||
741 tmp_chan_list->chan_number == 6 ||
742 tmp_chan_list->chan_number == 11))
5e6e3a92
BZ		 743 done_early = true;
744 }
745
746 /* The total scan time should be less than scan command timeout
747 value */
748 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
acebe8c1
ZL		 749 mwifiex_dbg(priv->adapter, ERROR,
750 "total scan time %dms\t"
751 "is over limit (%dms), scan skipped\n",
752 total_scan_time,
753 MWIFIEX_MAX_TOTAL_SCAN_TIME);
5e6e3a92
BZ		 754 ret = -1;
755 break;
756 }
757
78dfca62
AP		 758 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out,
759 radio_type);
760
5e6e3a92
BZ		 761 priv->adapter->scan_channels = start_chan;
762
763 /* Send the scan command to the firmware with the specified
764 cfg */
21f58d20
AK		 765 if (priv->adapter->ext_scan)
766 cmd_no = HostCmd_CMD_802_11_SCAN_EXT;
767 else
768 cmd_no = HostCmd_CMD_802_11_SCAN;
769
fa0ecbb9
BZ		 770 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET,
771 0, scan_cfg_out, false);
78dfca62
AP		 772
773 /* rate IE is updated per scan command but same starting
774 * pointer is used each time so that rate IE from earlier
775 * scan_cfg_out->buf is overwritten with new one.
776 */
777 scan_cfg_out->tlv_buf_len -=
778 sizeof(struct mwifiex_ie_types_header) + rates_size;
779
1845bd3a 780 if (ret) {
c70ca8cb 781 mwifiex_cancel_pending_scan_cmd(adapter);
5e6e3a92 782 break;
1845bd3a 783 }
5e6e3a92
BZ		 784 }
785
786 if (ret)
787 return -1;
788
789 return 0;
790}
791
792/*
793 * This function constructs a scan command configuration structure to use
794 * in scan commands.
795 *
796 * Application layer or other functions can invoke network scanning
797 * with a scan configuration supplied in a user scan configuration structure.
798 * This structure is used as the basis of one or many scan command configuration
799 * commands that are sent to the command processing module and eventually to the
800 * firmware.
801 *
802 * This function creates a scan command configuration structure based on the
803 * following user supplied parameters (if present):
804 * - SSID filter
805 * - BSSID filter
806 * - Number of Probes to be sent
807 * - Channel list
808 *
809 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
810 * If the number of probes is not set, adapter default setting is used.
811 */
812static void
cff23cec
YAP		 813mwifiex_config_scan(struct mwifiex_private *priv,
814 const struct mwifiex_user_scan_cfg *user_scan_in,
815 struct mwifiex_scan_cmd_config *scan_cfg_out,
816 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
817 struct mwifiex_chan_scan_param_set *scan_chan_list,
818 u8 *max_chan_per_scan, u8 *filtered_scan,
819 u8 *scan_current_only)
5e6e3a92
BZ		 820{
821 struct mwifiex_adapter *adapter = priv->adapter;
822 struct mwifiex_ie_types_num_probes *num_probes_tlv;
cb91be87 823 struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv;
c2a8f0ff 824 struct mwifiex_ie_types_random_mac *random_mac_tlv;
5e6e3a92 825 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
21f58d20 826 struct mwifiex_ie_types_bssid_list *bssid_tlv;
5e6e3a92
BZ		 827 u8 *tlv_pos;
828 u32 num_probes;
829 u32 ssid_len;
830 u32 chan_idx;
831 u32 scan_type;
832 u16 scan_dur;
833 u8 channel;
834 u8 radio_type;
be0b281e 835 int i;
5e6e3a92 836 u8 ssid_filter;
5e6e3a92 837 struct mwifiex_ie_types_htcap *ht_cap;
40d7412b 838 struct mwifiex_ie_types_bss_mode *bss_mode;
c2a8f0ff 839 const u8 zero_mac[6] = {0, 0, 0, 0, 0, 0};
5e6e3a92
BZ		 840
841 /* The tlv_buf_len is calculated for each scan command. The TLVs added
842 in this routine will be preserved since the routine that sends the
843 command will append channelTLVs at *chan_list_out. The difference
844 between the *chan_list_out and the tlv_buf start will be used to
845 calculate the size of anything we add in this routine. */
846 scan_cfg_out->tlv_buf_len = 0;
847
848 /* Running tlv pointer. Assigned to chan_list_out at end of function
849 so later routines know where channels can be added to the command
850 buf */
851 tlv_pos = scan_cfg_out->tlv_buf;
852
853 /* Initialize the scan as un-filtered; the flag is later set to TRUE
854 below if a SSID or BSSID filter is sent in the command */
855 *filtered_scan = false;
856
857 /* Initialize the scan as not being only on the current channel. If
858 the channel list is customized, only contains one channel, and is
859 the active channel, this is set true and data flow is not halted. */
860 *scan_current_only = false;
861
862 if (user_scan_in) {
5653c646 863 u8 tmpaddr[ETH_ALEN];
5e6e3a92
BZ		 864
865 /* Default the ssid_filter flag to TRUE, set false under
866 certain wildcard conditions and qualified by the existence
867 of an SSID list before marking the scan as filtered */
868 ssid_filter = true;
869
870 /* Set the BSS type scan filter, use Adapter setting if
871 unset */
872 scan_cfg_out->bss_mode =
2ccf7cef 873 (u8)(user_scan_in->bss_mode ?: adapter->scan_mode);
5e6e3a92
BZ		 874
875 /* Set the number of probes to send, use Adapter setting
876 if unset */
2ccf7cef 877 num_probes = user_scan_in->num_probes ?: adapter->scan_probes;
5e6e3a92
BZ		 878
879 /*
880 * Set the BSSID filter to the incoming configuration,
881 * if non-zero. If not set, it will remain disabled
882 * (all zeros).
883 */
884 memcpy(scan_cfg_out->specific_bssid,
885 user_scan_in->specific_bssid,
886 sizeof(scan_cfg_out->specific_bssid));
887
5653c646
DM		 888 memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN);
889
21f58d20 890 if (adapter->ext_scan &&
5653c646 891 !is_zero_ether_addr(tmpaddr)) {
21f58d20
AK		 892 bssid_tlv =
893 (struct mwifiex_ie_types_bssid_list *)tlv_pos;
894 bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID);
895 bssid_tlv->header.len = cpu_to_le16(ETH_ALEN);
896 memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid,
897 ETH_ALEN);
898 tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list);
899 }
900
be0b281e
AK		 901 for (i = 0; i < user_scan_in->num_ssids; i++) {
902 ssid_len = user_scan_in->ssid_list[i].ssid_len;
5e6e3a92
BZ		 903
904 wildcard_ssid_tlv =
905 (struct mwifiex_ie_types_wildcard_ssid_params *)
906 tlv_pos;
907 wildcard_ssid_tlv->header.type =
908 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
909 wildcard_ssid_tlv->header.len = cpu_to_le16(
910 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
911 max_ssid_length)));
fada1058 912
be0b281e
AK		 913 /*
914 * max_ssid_length = 0 tells firmware to perform
915 * specific scan for the SSID filled, whereas
916 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
917 * wildcard scan.
918 */
919 if (ssid_len)
920 wildcard_ssid_tlv->max_ssid_length = 0;
921 else
922 wildcard_ssid_tlv->max_ssid_length =
923 IEEE80211_MAX_SSID_LEN;
5e6e3a92 924
0c6303cc
AN		 925 if (!memcmp(user_scan_in->ssid_list[i].ssid,
926 "DIRECT-", 7))
927 wildcard_ssid_tlv->max_ssid_length = 0xfe;
928
5e6e3a92 929 memcpy(wildcard_ssid_tlv->ssid,
be0b281e 930 user_scan_in->ssid_list[i].ssid, ssid_len);
5e6e3a92
BZ		 931
932 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
933 + le16_to_cpu(wildcard_ssid_tlv->header.len));
934
acebe8c1
ZL		 935 mwifiex_dbg(adapter, INFO,
936 "info: scan: ssid[%d]: %s, %d\n",
937 i, wildcard_ssid_tlv->ssid,
938 wildcard_ssid_tlv->max_ssid_length);
5e6e3a92
BZ		 939
940 /* Empty wildcard ssid with a maxlen will match many or
941 potentially all SSIDs (maxlen == 32), therefore do
942 not treat the scan as
943 filtered. */
944 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
945 ssid_filter = false;
5e6e3a92
BZ		 946 }
947
948 /*
949 * The default number of channels sent in the command is low to
950 * ensure the response buffer from the firmware does not
951 * truncate scan results. That is not an issue with an SSID
952 * or BSSID filter applied to the scan results in the firmware.
953 */
5653c646 954 memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN);
cff23cec 955 if ((i && ssid_filter) ||
5653c646 956 !is_zero_ether_addr(tmpaddr))
5e6e3a92 957 *filtered_scan = true;
8eda10ea
AP		 958
959 if (user_scan_in->scan_chan_gap) {
acebe8c1
ZL		 960 mwifiex_dbg(adapter, INFO,
961 "info: scan: channel gap = %d\n",
962 user_scan_in->scan_chan_gap);
8eda10ea
AP		 963 *max_chan_per_scan =
964 MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
965
966 chan_gap_tlv = (void *)tlv_pos;
967 chan_gap_tlv->header.type =
968 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP);
969 chan_gap_tlv->header.len =
970 cpu_to_le16(sizeof(chan_gap_tlv->chan_gap));
971 chan_gap_tlv->chan_gap =
972 cpu_to_le16((user_scan_in->scan_chan_gap));
973 tlv_pos +=
974 sizeof(struct mwifiex_ie_types_scan_chan_gap);
975 }
c2a8f0ff
GB		 976
977 if (!ether_addr_equal(user_scan_in->random_mac, zero_mac)) {
978 random_mac_tlv = (void *)tlv_pos;
979 random_mac_tlv->header.type =
980 cpu_to_le16(TLV_TYPE_RANDOM_MAC);
981 random_mac_tlv->header.len =
982 cpu_to_le16(sizeof(random_mac_tlv->mac));
983 ether_addr_copy(random_mac_tlv->mac,
984 user_scan_in->random_mac);
985 tlv_pos +=
986 sizeof(struct mwifiex_ie_types_random_mac);
987 }
5e6e3a92
BZ		 988 } else {
989 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
990 num_probes = adapter->scan_probes;
991 }
992
993 /*
994 * If a specific BSSID or SSID is used, the number of channels in the
995 * scan command will be increased to the absolute maximum.
996 */
0a5cc497 997 if (*filtered_scan) {
5e6e3a92 998 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
0a5cc497
AK		 999 } else {
1000 if (!priv->media_connected)
1001 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
1002 else
1003 *max_chan_per_scan =
1004 MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD / 2;
1005 }
5e6e3a92 1006
40d7412b
AN		 1007 if (adapter->ext_scan) {
1008 bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos;
1009 bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE);
1010 bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode));
1011 bss_mode->bss_mode = scan_cfg_out->bss_mode;
1012 tlv_pos += sizeof(bss_mode->header) +
1013 le16_to_cpu(bss_mode->header.len);
1014 }
1015
5e6e3a92
BZ		 1016 /* If the input config or adapter has the number of Probes set,
1017 add tlv */
1018 if (num_probes) {
1019
acebe8c1
ZL		 1020 mwifiex_dbg(adapter, INFO,
1021 "info: scan: num_probes = %d\n",
1022 num_probes);
5e6e3a92
BZ		 1023
1024 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
1025 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
1026 num_probes_tlv->header.len =
1027 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
1028 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
1029
1030 tlv_pos += sizeof(num_probes_tlv->header) +
1031 le16_to_cpu(num_probes_tlv->header.len);
1032
1033 }
1034
cff23cec
YAP		 1035 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
1036 (priv->adapter->config_bands & BAND_GN ||
1037 priv->adapter->config_bands & BAND_AN)) {
5e6e3a92
BZ		 1038 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
1039 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
1040 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
1041 ht_cap->header.len =
1042 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
a46b7b5c
AK		 1043 radio_type =
1044 mwifiex_band_to_radio_type(priv->adapter->config_bands);
341b8800 1045 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
5e6e3a92
BZ		 1046 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
1047 }
1048
1049 /* Append vendor specific IE TLV */
1050 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
1051
1052 /*
1053 * Set the output for the channel TLV to the address in the tlv buffer
1054 * past any TLVs that were added in this function (SSID, num_probes).
1055 * Channel TLVs will be added past this for each scan command,
1056 * preserving the TLVs that were previously added.
1057 */
1058 *chan_list_out =
1059 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
1060
1061 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
1062
acebe8c1
ZL		 1063 mwifiex_dbg(adapter, INFO,
1064 "info: Scan: Using supplied channel list\n");
5e6e3a92
BZ		 1065
1066 for (chan_idx = 0;
cff23cec
YAP		 1067 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
1068 user_scan_in->chan_list[chan_idx].chan_number;
5e6e3a92
BZ		 1069 chan_idx++) {
1070
1071 channel = user_scan_in->chan_list[chan_idx].chan_number;
948ad6b3 1072 scan_chan_list[chan_idx].chan_number = channel;
5e6e3a92
BZ		 1073
1074 radio_type =
1075 user_scan_in->chan_list[chan_idx].radio_type;
948ad6b3 1076 scan_chan_list[chan_idx].radio_type = radio_type;
5e6e3a92
BZ		 1077
1078 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
1079
1080 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
948ad6b3 1081 scan_chan_list[chan_idx].chan_scan_mode_bitmap
2375fa2b 1082 |= (MWIFIEX_PASSIVE_SCAN |
1083 MWIFIEX_HIDDEN_SSID_REPORT);
5e6e3a92 1084 else
948ad6b3 1085 scan_chan_list[chan_idx].chan_scan_mode_bitmap
5e6e3a92
BZ		 1086 &= ~MWIFIEX_PASSIVE_SCAN;
1087
1b499cb7
AK		 1088 scan_chan_list[chan_idx].chan_scan_mode_bitmap
1089 |= MWIFIEX_DISABLE_CHAN_FILT;
f3e1af3e 1090
5e6e3a92
BZ		 1091 if (user_scan_in->chan_list[chan_idx].scan_time) {
1092 scan_dur = (u16) user_scan_in->
1093 chan_list[chan_idx].scan_time;
1094 } else {
1095 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1096 scan_dur = adapter->passive_scan_time;
1097 else if (*filtered_scan)
1098 scan_dur = adapter->specific_scan_time;
1099 else
1100 scan_dur = adapter->active_scan_time;
1101 }
1102
948ad6b3 1103 scan_chan_list[chan_idx].min_scan_time =
5e6e3a92 1104 cpu_to_le16(scan_dur);
948ad6b3 1105 scan_chan_list[chan_idx].max_scan_time =
5e6e3a92
BZ		 1106 cpu_to_le16(scan_dur);
1107 }
1108
1109 /* Check if we are only scanning the current channel */
cff23cec
YAP		 1110 if ((chan_idx == 1) &&
1111 (user_scan_in->chan_list[0].chan_number ==
1112 priv->curr_bss_params.bss_descriptor.channel)) {
5e6e3a92 1113 *scan_current_only = true;
acebe8c1
ZL		 1114 mwifiex_dbg(adapter, INFO,
1115 "info: Scan: Scanning current channel only\n");
5e6e3a92 1116 }
5e6e3a92 1117 } else {
acebe8c1
ZL		 1118 mwifiex_dbg(adapter, INFO,
1119 "info: Scan: Creating full region channel list\n");
8ac91341
KR		 1120 mwifiex_scan_create_channel_list(priv, user_scan_in,
1121 scan_chan_list,
1122 *filtered_scan);
658f37b7
AK		 1123 }
1124
5e6e3a92
BZ		 1125}
1126
1127/*
1128 * This function inspects the scan response buffer for pointers to
1129 * expected TLVs.
1130 *
1131 * TLVs can be included at the end of the scan response BSS information.
1132 *
1133 * Data in the buffer is parsed pointers to TLVs that can potentially
1134 * be passed back in the response.
1135 */
1136static void
1137mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1138 struct mwifiex_ie_types_data *tlv,
1139 u32 tlv_buf_size, u32 req_tlv_type,
1140 struct mwifiex_ie_types_data **tlv_data)
1141{
1142 struct mwifiex_ie_types_data *current_tlv;
1143 u32 tlv_buf_left;
1144 u32 tlv_type;
1145 u32 tlv_len;
1146
1147 current_tlv = tlv;
1148 tlv_buf_left = tlv_buf_size;
1149 *tlv_data = NULL;
1150
acebe8c1
ZL		 1151 mwifiex_dbg(adapter, INFO,
1152 "info: SCAN_RESP: tlv_buf_size = %d\n",
1153 tlv_buf_size);
5e6e3a92
BZ		 1154
1155 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1156
1157 tlv_type = le16_to_cpu(current_tlv->header.type);
1158 tlv_len = le16_to_cpu(current_tlv->header.len);
1159
1160 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
acebe8c1
ZL		 1161 mwifiex_dbg(adapter, ERROR,
1162 "SCAN_RESP: TLV buffer corrupt\n");
5e6e3a92
BZ		 1163 break;
1164 }
1165
1166 if (req_tlv_type == tlv_type) {
1167 switch (tlv_type) {
1168 case TLV_TYPE_TSFTIMESTAMP:
acebe8c1
ZL		 1169 mwifiex_dbg(adapter, INFO,
1170 "info: SCAN_RESP: TSF\t"
1171 "timestamp TLV, len = %d\n",
1172 tlv_len);
2c208890 1173 *tlv_data = current_tlv;
5e6e3a92
BZ		 1174 break;
1175 case TLV_TYPE_CHANNELBANDLIST:
acebe8c1
ZL		 1176 mwifiex_dbg(adapter, INFO,
1177 "info: SCAN_RESP: channel\t"
1178 "band list TLV, len = %d\n",
1179 tlv_len);
2c208890 1180 *tlv_data = current_tlv;
5e6e3a92
BZ		 1181 break;
1182 default:
acebe8c1
ZL		 1183 mwifiex_dbg(adapter, ERROR,
1184 "SCAN_RESP: unhandled TLV = %d\n",
1185 tlv_type);
5e6e3a92
BZ		 1186 /* Give up, this seems corrupted */
1187 return;
1188 }
1189 }
1190
1191 if (*tlv_data)
1192 break;
1193
1194
1195 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1196 current_tlv =
1197 (struct mwifiex_ie_types_data *) (current_tlv->data +
1198 tlv_len);
1199
1200 } /* while */
1201}
1202
1203/*
7c6fa2a8
AK		 1204 * This function parses provided beacon buffer and updates
1205 * respective fields in bss descriptor structure.
5e6e3a92 1206 */
9558a407
AK		 1207int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1208 struct mwifiex_bssdescriptor *bss_entry)
5e6e3a92
BZ		 1209{
1210 int ret = 0;
1211 u8 element_id;
1212 struct ieee_types_fh_param_set *fh_param_set;
1213 struct ieee_types_ds_param_set *ds_param_set;
1214 struct ieee_types_cf_param_set *cf_param_set;
1215 struct ieee_types_ibss_param_set *ibss_param_set;
5e6e3a92
BZ		 1216 u8 *current_ptr;
1217 u8 *rate;
1218 u8 element_len;
1219 u16 total_ie_len;
1220 u8 bytes_to_copy;
1221 u8 rate_size;
5e6e3a92 1222 u8 found_data_rate_ie;
7c6fa2a8 1223 u32 bytes_left;
5e6e3a92
BZ		 1224 struct ieee_types_vendor_specific *vendor_ie;
1225 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1226 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1227
1228 found_data_rate_ie = false;
1229 rate_size = 0;
9558a407
AK		 1230 current_ptr = bss_entry->beacon_buf;
1231 bytes_left = bss_entry->beacon_buf_size;
5e6e3a92
BZ		 1232
1233 /* Process variable IE */
7c6fa2a8 1234 while (bytes_left >= 2) {
5e6e3a92
BZ		 1235 element_id = *current_ptr;
1236 element_len = *(current_ptr + 1);
1237 total_ie_len = element_len + sizeof(struct ieee_types_header);
1238
7c6fa2a8 1239 if (bytes_left < total_ie_len) {
acebe8c1
ZL		 1240 mwifiex_dbg(adapter, ERROR,
1241 "err: InterpretIE: in processing\t"
1242 "IE, bytes left < IE length\n");
7c6fa2a8 1243 return -1;
5e6e3a92
BZ		 1244 }
1245 switch (element_id) {
1246 case WLAN_EID_SSID:
1247 bss_entry->ssid.ssid_len = element_len;
1248 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1249 element_len);
acebe8c1
ZL		 1250 mwifiex_dbg(adapter, INFO,
1251 "info: InterpretIE: ssid: %-32s\n",
1252 bss_entry->ssid.ssid);
5e6e3a92
BZ		 1253 break;
1254
1255 case WLAN_EID_SUPP_RATES:
1256 memcpy(bss_entry->data_rates, current_ptr + 2,
1257 element_len);
1258 memcpy(bss_entry->supported_rates, current_ptr + 2,
1259 element_len);
1260 rate_size = element_len;
1261 found_data_rate_ie = true;
1262 break;
1263
1264 case WLAN_EID_FH_PARAMS:
1265 fh_param_set =
1266 (struct ieee_types_fh_param_set *) current_ptr;
1267 memcpy(&bss_entry->phy_param_set.fh_param_set,
1268 fh_param_set,
1269 sizeof(struct ieee_types_fh_param_set));
1270 break;
1271
1272 case WLAN_EID_DS_PARAMS:
1273 ds_param_set =
1274 (struct ieee_types_ds_param_set *) current_ptr;
1275
1276 bss_entry->channel = ds_param_set->current_chan;
1277
1278 memcpy(&bss_entry->phy_param_set.ds_param_set,
1279 ds_param_set,
1280 sizeof(struct ieee_types_ds_param_set));
1281 break;
1282
1283 case WLAN_EID_CF_PARAMS:
1284 cf_param_set =
1285 (struct ieee_types_cf_param_set *) current_ptr;
1286 memcpy(&bss_entry->ss_param_set.cf_param_set,
1287 cf_param_set,
1288 sizeof(struct ieee_types_cf_param_set));
1289 break;
1290
1291 case WLAN_EID_IBSS_PARAMS:
1292 ibss_param_set =
1293 (struct ieee_types_ibss_param_set *)
1294 current_ptr;
1295 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1296 ibss_param_set,
1297 sizeof(struct ieee_types_ibss_param_set));
1298 break;
1299
1300 case WLAN_EID_ERP_INFO:
1301 bss_entry->erp_flags = *(current_ptr + 2);
1302 break;
1303
2a7305c8
AK		 1304 case WLAN_EID_PWR_CONSTRAINT:
1305 bss_entry->local_constraint = *(current_ptr + 2);
1306 bss_entry->sensed_11h = true;
1307 break;
1308
1309 case WLAN_EID_CHANNEL_SWITCH:
1310 bss_entry->chan_sw_ie_present = true;
1311 case WLAN_EID_PWR_CAPABILITY:
1312 case WLAN_EID_TPC_REPORT:
1313 case WLAN_EID_QUIET:
1314 bss_entry->sensed_11h = true;
1315 break;
1316
5e6e3a92
BZ		 1317 case WLAN_EID_EXT_SUPP_RATES:
1318 /*
1319 * Only process extended supported rate
1320 * if data rate is already found.
1321 * Data rate IE should come before
1322 * extended supported rate IE
1323 */
1324 if (found_data_rate_ie) {
1325 if ((element_len + rate_size) >
1326 MWIFIEX_SUPPORTED_RATES)
1327 bytes_to_copy =
1328 (MWIFIEX_SUPPORTED_RATES -
1329 rate_size);
1330 else
1331 bytes_to_copy = element_len;
1332
1333 rate = (u8 *) bss_entry->data_rates;
1334 rate += rate_size;
1335 memcpy(rate, current_ptr + 2, bytes_to_copy);
1336
1337 rate = (u8 *) bss_entry->supported_rates;
1338 rate += rate_size;
1339 memcpy(rate, current_ptr + 2, bytes_to_copy);
1340 }
1341 break;
1342
1343 case WLAN_EID_VENDOR_SPECIFIC:
1344 vendor_ie = (struct ieee_types_vendor_specific *)
1345 current_ptr;
1346
1347 if (!memcmp
1348 (vendor_ie->vend_hdr.oui, wpa_oui,
1349 sizeof(wpa_oui))) {
1350 bss_entry->bcn_wpa_ie =
1351 (struct ieee_types_vendor_specific *)
1352 current_ptr;
cff23cec
YAP		 1353 bss_entry->wpa_offset = (u16)
1354 (current_ptr - bss_entry->beacon_buf);
5e6e3a92
BZ		 1355 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1356 sizeof(wmm_oui))) {
1357 if (total_ie_len ==
cff23cec
YAP		 1358 sizeof(struct ieee_types_wmm_parameter) ||
1359 total_ie_len ==
5e6e3a92
BZ		 1360 sizeof(struct ieee_types_wmm_info))
1361 /*
1362 * Only accept and copy the WMM IE if
1363 * it matches the size expected for the
1364 * WMM Info IE or the WMM Parameter IE.
1365 */
1366 memcpy((u8 *) &bss_entry->wmm_ie,
1367 current_ptr, total_ie_len);
1368 }
1369 break;
1370 case WLAN_EID_RSN:
1371 bss_entry->bcn_rsn_ie =
1372 (struct ieee_types_generic *) current_ptr;
1373 bss_entry->rsn_offset = (u16) (current_ptr -
1374 bss_entry->beacon_buf);
1375 break;
1376 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1377 bss_entry->bcn_wapi_ie =
1378 (struct ieee_types_generic *) current_ptr;
1379 bss_entry->wapi_offset = (u16) (current_ptr -
1380 bss_entry->beacon_buf);
1381 break;
1382 case WLAN_EID_HT_CAPABILITY:
1383 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1384 (current_ptr +
1385 sizeof(struct ieee_types_header));
1386 bss_entry->ht_cap_offset = (u16) (current_ptr +
1387 sizeof(struct ieee_types_header) -
1388 bss_entry->beacon_buf);
1389 break;
074d46d1
JB		 1390 case WLAN_EID_HT_OPERATION:
1391 bss_entry->bcn_ht_oper =
1392 (struct ieee80211_ht_operation *)(current_ptr +
5e6e3a92
BZ		 1393 sizeof(struct ieee_types_header));
1394 bss_entry->ht_info_offset = (u16) (current_ptr +
1395 sizeof(struct ieee_types_header) -
1396 bss_entry->beacon_buf);
1397 break;
a5f39056
YAP		 1398 case WLAN_EID_VHT_CAPABILITY:
1399 bss_entry->disable_11ac = false;
1400 bss_entry->bcn_vht_cap =
1401 (void *)(current_ptr +
1402 sizeof(struct ieee_types_header));
1403 bss_entry->vht_cap_offset =
1404 (u16)((u8 *)bss_entry->bcn_vht_cap -
1405 bss_entry->beacon_buf);
1406 break;
1407 case WLAN_EID_VHT_OPERATION:
1408 bss_entry->bcn_vht_oper =
1409 (void *)(current_ptr +
1410 sizeof(struct ieee_types_header));
1411 bss_entry->vht_info_offset =
1412 (u16)((u8 *)bss_entry->bcn_vht_oper -
1413 bss_entry->beacon_buf);
1414 break;
5e6e3a92 1415 case WLAN_EID_BSS_COEX_2040:
cf831ffe
AK		 1416 bss_entry->bcn_bss_co_2040 = current_ptr;
1417 bss_entry->bss_co_2040_offset =
1418 (u16) (current_ptr - bss_entry->beacon_buf);
5e6e3a92
BZ		 1419 break;
1420 case WLAN_EID_EXT_CAPABILITY:
cf831ffe
AK		 1421 bss_entry->bcn_ext_cap = current_ptr;
1422 bss_entry->ext_cap_offset =
1423 (u16) (current_ptr - bss_entry->beacon_buf);
5e6e3a92 1424 break;
a5f39056 1425 case WLAN_EID_OPMODE_NOTIF:
cf831ffe 1426 bss_entry->oper_mode = (void *)current_ptr;
a5f39056
YAP		 1427 bss_entry->oper_mode_offset =
1428 (u16)((u8 *)bss_entry->oper_mode -
1429 bss_entry->beacon_buf);
1430 break;
5e6e3a92
BZ		 1431 default:
1432 break;
1433 }
1434
1435 current_ptr += element_len + 2;
1436
1437 /* Need to account for IE ID and IE Len */
7c6fa2a8 1438 bytes_left -= (element_len + 2);
5e6e3a92 1439
7c6fa2a8 1440 } /* while (bytes_left > 2) */
5e6e3a92
BZ		 1441 return ret;
1442}
1443
5e6e3a92
BZ		 1444/*
1445 * This function converts radio type scan parameter to a band configuration
1446 * to be used in join command.
1447 */
1448static u8
1449mwifiex_radio_type_to_band(u8 radio_type)
1450{
5e6e3a92
BZ		 1451 switch (radio_type) {
1452 case HostCmd_SCAN_RADIO_TYPE_A:
636c4598 1453 return BAND_A;
5e6e3a92
BZ		 1454 case HostCmd_SCAN_RADIO_TYPE_BG:
1455 default:
636c4598 1456 return BAND_G;
5e6e3a92 1457 }
5e6e3a92
BZ		 1458}
1459
5e6e3a92
BZ		 1460/*
1461 * This is an internal function used to start a scan based on an input
1462 * configuration.
1463 *
1464 * This uses the input user scan configuration information when provided in
1465 * order to send the appropriate scan commands to firmware to populate or
1466 * update the internal driver scan table.
1467 */
1a1fb970
AK		 1468int mwifiex_scan_networks(struct mwifiex_private *priv,
1469 const struct mwifiex_user_scan_cfg *user_scan_in)
5e6e3a92 1470{
c2476335 1471 int ret;
5e6e3a92 1472 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8
YAP		 1473 struct cmd_ctrl_node *cmd_node;
1474 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
5e6e3a92 1475 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
5e6e3a92 1476 struct mwifiex_chan_scan_param_set *scan_chan_list;
5e6e3a92
BZ		 1477 u8 filtered_scan;
1478 u8 scan_current_chan_only;
1479 u8 max_chan_per_scan;
1480 unsigned long flags;
1481
600f5d90 1482 if (adapter->scan_processing) {
acebe8c1
ZL		 1483 mwifiex_dbg(adapter, WARN,
1484 "cmd: Scan already in process...\n");
c2476335 1485 return -EBUSY;
5e6e3a92
BZ		 1486 }
1487
600f5d90 1488 if (priv->scan_block) {
acebe8c1
ZL		 1489 mwifiex_dbg(adapter, WARN,
1490 "cmd: Scan is blocked during association...\n");
c2476335 1491 return -EBUSY;
5e6e3a92
BZ		 1492 }
1493
e00483f7 1494 if (adapter->surprise_removed || adapter->is_cmd_timedout) {
acebe8c1
ZL		 1495 mwifiex_dbg(adapter, ERROR,
1496 "Ignore scan. Card removed or firmware in bad state\n");
e00483f7
AK		 1497 return -EFAULT;
1498 }
1499
c2476335
BZ		 1500 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1501 adapter->scan_processing = true;
1502 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1503
5e6e3a92 1504 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
0d2e7a5c 1505 GFP_KERNEL);
5e6e3a92 1506 if (!scan_cfg_out) {
061f2e69
AK		 1507 ret = -ENOMEM;
1508 goto done;
5e6e3a92
BZ		 1509 }
1510
0d2e7a5c
JP		 1511 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX,
1512 sizeof(struct mwifiex_chan_scan_param_set),
1513 GFP_KERNEL);
5e6e3a92 1514 if (!scan_chan_list) {
5e6e3a92 1515 kfree(scan_cfg_out);
061f2e69
AK		 1516 ret = -ENOMEM;
1517 goto done;
5e6e3a92
BZ		 1518 }
1519
cff23cec
YAP		 1520 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1521 &chan_list_out, scan_chan_list, &max_chan_per_scan,
1522 &filtered_scan, &scan_current_chan_only);
5e6e3a92 1523
600f5d90
AK		 1524 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1525 &scan_cfg_out->config, chan_list_out,
1526 scan_chan_list);
5e6e3a92
BZ		 1527
1528 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1529 if (!ret) {
1530 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1531 if (!list_empty(&adapter->scan_pending_q)) {
1532 cmd_node = list_first_entry(&adapter->scan_pending_q,
cff23cec 1533 struct cmd_ctrl_node, list);
5e6e3a92
BZ		 1534 list_del(&cmd_node->list);
1535 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
cff23cec 1536 flags);
5e6e3a92
BZ		 1537 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1538 true);
1a1fb970 1539 queue_work(adapter->workqueue, &adapter->main_work);
00d7ea11
AK		 1540
1541 /* Perform internal scan synchronously */
21de979e 1542 if (!priv->scan_request) {
acebe8c1
ZL		 1543 mwifiex_dbg(adapter, INFO,
1544 "wait internal scan\n");
00d7ea11 1545 mwifiex_wait_queue_complete(adapter, cmd_node);
21de979e 1546 }
5e6e3a92
BZ		 1547 } else {
1548 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1549 flags);
1550 }
5e6e3a92
BZ		 1551 }
1552
1553 kfree(scan_cfg_out);
1554 kfree(scan_chan_list);
061f2e69
AK		 1555done:
1556 if (ret) {
1557 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1558 adapter->scan_processing = false;
1559 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1560 }
5e6e3a92
BZ		 1561 return ret;
1562}
1563
1564/*
1565 * This function prepares a scan command to be sent to the firmware.
1566 *
1567 * This uses the scan command configuration sent to the command processing
1568 * module in command preparation stage to configure a scan command structure
1569 * to send to firmware.
1570 *
1571 * The fixed fields specifying the BSS type and BSSID filters as well as a
1572 * variable number/length of TLVs are sent in the command to firmware.
1573 *
1574 * Preparation also includes -
1575 * - Setting command ID, and proper size
1576 * - Ensuring correct endian-ness
1577 */
a5ffddb7
AK		 1578int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1579 struct mwifiex_scan_cmd_config *scan_cfg)
5e6e3a92
BZ		 1580{
1581 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
5e6e3a92
BZ		 1582
1583 /* Set fixed field variables in scan command */
1584 scan_cmd->bss_mode = scan_cfg->bss_mode;
1585 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1586 sizeof(scan_cmd->bssid));
1587 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1588
1589 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1590
1591 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1592 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1593 + sizeof(scan_cmd->bssid)
1594 + scan_cfg->tlv_buf_len + S_DS_GEN));
1595
1596 return 0;
1597}
1598
7c6fa2a8
AK		 1599/*
1600 * This function checks compatibility of requested network with current
1601 * driver settings.
1602 */
1603int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1604 struct mwifiex_bssdescriptor *bss_desc)
1605{
1606 int ret = -1;
1607
1608 if (!bss_desc)
1609 return -1;
1610
6685d109
YAP		 1611 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1612 (u16) bss_desc->channel, 0))) {
7c6fa2a8
AK		 1613 switch (priv->bss_mode) {
1614 case NL80211_IFTYPE_STATION:
1615 case NL80211_IFTYPE_ADHOC:
1616 ret = mwifiex_is_network_compatible(priv, bss_desc,
1617 priv->bss_mode);
1618 if (ret)
acebe8c1
ZL		 1619 mwifiex_dbg(priv->adapter, ERROR,
1620 "Incompatible network settings\n");
2f9279b5 1621 break;
7c6fa2a8 1622 default:
2f9279b5 1623 ret = 0;
7c6fa2a8
AK		 1624 }
1625 }
1626
1627 return ret;
1628}
1629
2375fa2b 1630/* This function checks if SSID string contains all zeroes or length is zero */
1631static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid)
1632{
1633 int idx;
1634
1635 for (idx = 0; idx < ssid->ssid_len; idx++) {
1636 if (ssid->ssid[idx])
1637 return false;
1638 }
1639
1640 return true;
1641}
1642
1643/* This function checks if any hidden SSID found in passive scan channels
1644 * and save those channels for specific SSID active scan
1645 */
1646static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv,
1647 struct cfg80211_bss *bss)
1648{
1649 struct mwifiex_bssdescriptor *bss_desc;
1650 int ret;
1651 int chid;
1652
1653 /* Allocate and fill new bss descriptor */
1654 bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL);
1655 if (!bss_desc)
1656 return -ENOMEM;
1657
1658 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1659 if (ret)
1660 goto done;
1661
1662 if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) {
1663 mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n");
1664 for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) {
1665 if (priv->hidden_chan[chid].chan_number ==
1666 bss->channel->hw_value)
1667 break;
1668
1669 if (!priv->hidden_chan[chid].chan_number) {
1670 priv->hidden_chan[chid].chan_number =
1671 bss->channel->hw_value;
1672 priv->hidden_chan[chid].radio_type =
1673 bss->channel->band;
1674 priv->hidden_chan[chid].scan_type =
1675 MWIFIEX_SCAN_TYPE_ACTIVE;
1676 break;
1677 }
1678 }
1679 }
1680
1681done:
5ff26222
RL		 1682 /* beacon_ie buffer was allocated in function
1683 * mwifiex_fill_new_bss_desc(). Free it now.
1684 */
1685 kfree(bss_desc->beacon_buf);
2375fa2b 1686 kfree(bss_desc);
1687 return 0;
1688}
1689
9558a407
AK		 1690static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1691 struct cfg80211_bss *bss)
7c6fa2a8 1692{
db652e4b 1693 struct mwifiex_bssdescriptor *bss_desc;
7c6fa2a8
AK		 1694 int ret;
1695 unsigned long flags;
7c6fa2a8
AK		 1696
1697 /* Allocate and fill new bss descriptor */
0d2e7a5c
JP		 1698 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL);
1699 if (!bss_desc)
7c6fa2a8 1700 return -ENOMEM;
5982b47a 1701
9558a407 1702 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
7c6fa2a8
AK		 1703 if (ret)
1704 goto done;
1705
1706 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1707 if (ret)
1708 goto done;
1709
7c6fa2a8 1710 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
7c6fa2a8
AK		 1711 /* Make a copy of current BSSID descriptor */
1712 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
cff23cec 1713 sizeof(priv->curr_bss_params.bss_descriptor));
d837a2ae
BZ		 1714
1715 /* The contents of beacon_ie will be copied to its own buffer
1716 * in mwifiex_save_curr_bcn()
1717 */
7c6fa2a8
AK		 1718 mwifiex_save_curr_bcn(priv);
1719 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1720
1721done:
d837a2ae
BZ		 1722 /* beacon_ie buffer was allocated in function
1723 * mwifiex_fill_new_bss_desc(). Free it now.
1724 */
1725 kfree(bss_desc->beacon_buf);
7c6fa2a8 1726 kfree(bss_desc);
7c6fa2a8
AK		 1727 return 0;
1728}
1729
3b4d5c64
AK		 1730static int
1731mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
1732 u32 *bytes_left, u64 fw_tsf, u8 *radio_type,
21f58d20 1733 bool ext_scan, s32 rssi_val)
3b4d5c64
AK		 1734{
1735 struct mwifiex_adapter *adapter = priv->adapter;
1736 struct mwifiex_chan_freq_power *cfp;
1737 struct cfg80211_bss *bss;
1738 u8 bssid[ETH_ALEN];
1739 s32 rssi;
1740 const u8 *ie_buf;
1741 size_t ie_len;
1742 u16 channel = 0;
1743 u16 beacon_size = 0;
1744 u32 curr_bcn_bytes;
1745 u32 freq;
1746 u16 beacon_period;
1747 u16 cap_info_bitmap;
1748 u8 *current_ptr;
1749 u64 timestamp;
1750 struct mwifiex_fixed_bcn_param *bcn_param;
1751 struct mwifiex_bss_priv *bss_priv;
1752
1753 if (*bytes_left >= sizeof(beacon_size)) {
1754 /* Extract & convert beacon size from command buffer */
5653c646 1755 beacon_size = get_unaligned_le16((*bss_info));
3b4d5c64
AK		 1756 *bytes_left -= sizeof(beacon_size);
1757 *bss_info += sizeof(beacon_size);
1758 }
1759
1760 if (!beacon_size || beacon_size > *bytes_left) {
1761 *bss_info += *bytes_left;
1762 *bytes_left = 0;
1763 return -EFAULT;
1764 }
1765
1766 /* Initialize the current working beacon pointer for this BSS
1767 * iteration
1768 */
1769 current_ptr = *bss_info;
1770
1771 /* Advance the return beacon pointer past the current beacon */
1772 *bss_info += beacon_size;
1773 *bytes_left -= beacon_size;
1774
1775 curr_bcn_bytes = beacon_size;
1776
1777 /* First 5 fields are bssid, RSSI(for legacy scan only),
1778 * time stamp, beacon interval, and capability information
1779 */
1780 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
1781 sizeof(struct mwifiex_fixed_bcn_param)) {
acebe8c1
ZL		 1782 mwifiex_dbg(adapter, ERROR,
1783 "InterpretIE: not enough bytes left\n");
3b4d5c64
AK		 1784 return -EFAULT;
1785 }
1786
1787 memcpy(bssid, current_ptr, ETH_ALEN);
1788 current_ptr += ETH_ALEN;
1789 curr_bcn_bytes -= ETH_ALEN;
1790
1791 if (!ext_scan) {
45d18c56 1792 rssi = (s32) *current_ptr;
3b4d5c64
AK		 1793 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1794 current_ptr += sizeof(u8);
1795 curr_bcn_bytes -= sizeof(u8);
acebe8c1
ZL		 1796 mwifiex_dbg(adapter, INFO,
1797 "info: InterpretIE: RSSI=%d\n", rssi);
21f58d20
AK		 1798 } else {
1799 rssi = rssi_val;
3b4d5c64
AK		 1800 }
1801
1802 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr;
1803 current_ptr += sizeof(*bcn_param);
1804 curr_bcn_bytes -= sizeof(*bcn_param);
1805
1806 timestamp = le64_to_cpu(bcn_param->timestamp);
1807 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1808
1809 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
acebe8c1
ZL		 1810 mwifiex_dbg(adapter, INFO,
1811 "info: InterpretIE: capabilities=0x%X\n",
1812 cap_info_bitmap);
3b4d5c64
AK		 1813
1814 /* Rest of the current buffer are IE's */
1815 ie_buf = current_ptr;
1816 ie_len = curr_bcn_bytes;
acebe8c1
ZL		 1817 mwifiex_dbg(adapter, INFO,
1818 "info: InterpretIE: IELength for this AP = %d\n",
1819 curr_bcn_bytes);
3b4d5c64
AK		 1820
1821 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1822 u8 element_id, element_len;
1823
1824 element_id = *current_ptr;
1825 element_len = *(current_ptr + 1);
1826 if (curr_bcn_bytes < element_len +
1827 sizeof(struct ieee_types_header)) {
acebe8c1
ZL		 1828 mwifiex_dbg(adapter, ERROR,
1829 "%s: bytes left < IE length\n", __func__);
3b4d5c64
AK		 1830 return -EFAULT;
1831 }
1832 if (element_id == WLAN_EID_DS_PARAMS) {
1833 channel = *(current_ptr +
1834 sizeof(struct ieee_types_header));
1835 break;
1836 }
1837
1838 current_ptr += element_len + sizeof(struct ieee_types_header);
1839 curr_bcn_bytes -= element_len +
1840 sizeof(struct ieee_types_header);
1841 }
1842
1843 if (channel) {
1844 struct ieee80211_channel *chan;
1845 u8 band;
1846
1847 /* Skip entry if on csa closed channel */
1848 if (channel == priv->csa_chan) {
acebe8c1
ZL		 1849 mwifiex_dbg(adapter, WARN,
1850 "Dropping entry on csa closed channel\n");
3b4d5c64
AK		 1851 return 0;
1852 }
1853
1854 band = BAND_G;
1855 if (radio_type)
1856 band = mwifiex_radio_type_to_band(*radio_type &
1857 (BIT(0) | BIT(1)));
1858
1859 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1860
1861 freq = cfp ? cfp->freq : 0;
1862
4facc34a 1863 chan = ieee80211_get_channel(priv->wdev.wiphy, freq);
3b4d5c64
AK		 1864
1865 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
4facc34a 1866 bss = cfg80211_inform_bss(priv->wdev.wiphy,
5bc8c1f2
JB		 1867 chan, CFG80211_BSS_FTYPE_UNKNOWN,
1868 bssid, timestamp,
3b4d5c64
AK		 1869 cap_info_bitmap, beacon_period,
1870 ie_buf, ie_len, rssi, GFP_KERNEL);
02421dd3
XH		 1871 if (bss) {
1872 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1873 bss_priv->band = band;
1874 bss_priv->fw_tsf = fw_tsf;
1875 if (priv->media_connected &&
1876 !memcmp(bssid, priv->curr_bss_params.
1877 bss_descriptor.mac_address,
1878 ETH_ALEN))
1879 mwifiex_update_curr_bss_params(priv,
1880 bss);
1881 cfg80211_put_bss(priv->wdev.wiphy, bss);
1882 }
2375fa2b 1883
1884 if ((chan->flags & IEEE80211_CHAN_RADAR) ||
1885 (chan->flags & IEEE80211_CHAN_NO_IR)) {
1886 mwifiex_dbg(adapter, INFO,
1887 "radar or passive channel %d\n",
1888 channel);
1889 mwifiex_save_hidden_ssid_channels(priv, bss);
1890 }
3b4d5c64
AK		 1891 }
1892 } else {
acebe8c1 1893 mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n");
3b4d5c64
AK		 1894 }
1895
1896 return 0;
1897}
1898
21445049
AP		 1899static void mwifiex_complete_scan(struct mwifiex_private *priv)
1900{
1901 struct mwifiex_adapter *adapter = priv->adapter;
1902
bf354433 1903 adapter->survey_idx = 0;
21445049
AP		 1904 if (adapter->curr_cmd->wait_q_enabled) {
1905 adapter->cmd_wait_q.status = 0;
1906 if (!priv->scan_request) {
acebe8c1
ZL		 1907 mwifiex_dbg(adapter, INFO,
1908 "complete internal scan\n");
21445049
AP		 1909 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1910 }
1911 }
1912}
1913
2375fa2b 1914/* This function checks if any hidden SSID found in passive scan channels
1915 * and do specific SSID active scan for those channels
1916 */
1917static int
1918mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv)
1919{
1920 int ret;
1921 struct mwifiex_adapter *adapter = priv->adapter;
1922 u8 id = 0;
1923 struct mwifiex_user_scan_cfg *user_scan_cfg;
1924
16d25da9
AK		 1925 if (adapter->active_scan_triggered || !priv->scan_request ||
1926 priv->scan_aborting) {
2375fa2b 1927 adapter->active_scan_triggered = false;
1928 return 0;
1929 }
1930
1931 if (!priv->hidden_chan[0].chan_number) {
1932 mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n");
1933 return 0;
1934 }
1935 user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL);
1936
1937 if (!user_scan_cfg)
1938 return -ENOMEM;
1939
1940 memset(user_scan_cfg, 0, sizeof(*user_scan_cfg));
1941
1942 for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) {
1943 if (!priv->hidden_chan[id].chan_number)
1944 break;
1945 memcpy(&user_scan_cfg->chan_list[id],
1946 &priv->hidden_chan[id],
1947 sizeof(struct mwifiex_user_scan_chan));
1948 }
1949
1950 adapter->active_scan_triggered = true;
c2a8f0ff 1951 ether_addr_copy(user_scan_cfg->random_mac, priv->random_mac);
2375fa2b 1952 user_scan_cfg->num_ssids = priv->scan_request->n_ssids;
1953 user_scan_cfg->ssid_list = priv->scan_request->ssids;
1954
1955 ret = mwifiex_scan_networks(priv, user_scan_cfg);
1956 kfree(user_scan_cfg);
1957
1958 memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan));
1959
1960 if (ret) {
1961 dev_err(priv->adapter->dev, "scan failed: %d\n", ret);
1962 return ret;
1963 }
1964
1965 return 0;
1966}
d44b5c2f
AK		 1967static void mwifiex_check_next_scan_command(struct mwifiex_private *priv)
1968{
1969 struct mwifiex_adapter *adapter = priv->adapter;
c70ca8cb 1970 struct cmd_ctrl_node *cmd_node;
d44b5c2f
AK		 1971 unsigned long flags;
1972
1973 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1974 if (list_empty(&adapter->scan_pending_q)) {
1975 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
c70ca8cb 1976
d44b5c2f
AK		 1977 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1978 adapter->scan_processing = false;
1979 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1980
2375fa2b 1981 mwifiex_active_scan_req_for_passive_chan(priv);
1982
21445049
AP		 1983 if (!adapter->ext_scan)
1984 mwifiex_complete_scan(priv);
1985
d44b5c2f 1986 if (priv->scan_request) {
1d76250b
AS		 1987 struct cfg80211_scan_info info = {
1988 .aborted = false,
1989 };
1990
acebe8c1
ZL		 1991 mwifiex_dbg(adapter, INFO,
1992 "info: notifying scan done\n");
1d76250b 1993 cfg80211_scan_done(priv->scan_request, &info);
d44b5c2f 1994 priv->scan_request = NULL;
09e672a1 1995 priv->scan_aborting = false;
d44b5c2f
AK		 1996 } else {
1997 priv->scan_aborting = false;
acebe8c1
ZL		 1998 mwifiex_dbg(adapter, INFO,
1999 "info: scan already aborted\n");
d44b5c2f 2000 }
d8d91253
AK		 2001 } else if ((priv->scan_aborting && !priv->scan_request) ||
2002 priv->scan_block) {
d8d91253
AK		 2003 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2004
c70ca8cb
AF		 2005 mwifiex_cancel_pending_scan_cmd(adapter);
2006
d8d91253
AK		 2007 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
2008 adapter->scan_processing = false;
2009 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
2010
2375fa2b 2011 if (!adapter->active_scan_triggered) {
2012 if (priv->scan_request) {
1d76250b
AS		 2013 struct cfg80211_scan_info info = {
2014 .aborted = true,
2015 };
2016
2375fa2b 2017 mwifiex_dbg(adapter, INFO,
2018 "info: aborting scan\n");
1d76250b 2019 cfg80211_scan_done(priv->scan_request, &info);
2375fa2b 2020 priv->scan_request = NULL;
09e672a1 2021 priv->scan_aborting = false;
2375fa2b 2022 } else {
2023 priv->scan_aborting = false;
2024 mwifiex_dbg(adapter, INFO,
2025 "info: scan already aborted\n");
2026 }
d44b5c2f 2027 }
d8d91253
AK		 2028 } else {
2029 /* Get scan command from scan_pending_q and put to
2030 * cmd_pending_q
2031 */
2032 cmd_node = list_first_entry(&adapter->scan_pending_q,
2033 struct cmd_ctrl_node, list);
2034 list_del(&cmd_node->list);
2035 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2036 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
d44b5c2f
AK		 2037 }
2038
2039 return;
2040}
2041
a9c790ba
XH		 2042void mwifiex_cancel_scan(struct mwifiex_adapter *adapter)
2043{
2044 struct mwifiex_private *priv;
2045 unsigned long cmd_flags;
2046 int i;
2047
2048 mwifiex_cancel_pending_scan_cmd(adapter);
2049
2050 if (adapter->scan_processing) {
2051 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
2052 adapter->scan_processing = false;
2053 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
2054 for (i = 0; i < adapter->priv_num; i++) {
2055 priv = adapter->priv[i];
2056 if (!priv)
2057 continue;
2058 if (priv->scan_request) {
88b3ec52
DM		 2059 struct cfg80211_scan_info info = {
2060 .aborted = true,
2061 };
2062
a9c790ba
XH		 2063 mwifiex_dbg(adapter, INFO,
2064 "info: aborting scan\n");
88b3ec52 2065 cfg80211_scan_done(priv->scan_request, &info);
a9c790ba 2066 priv->scan_request = NULL;
09e672a1 2067 priv->scan_aborting = false;
a9c790ba
XH		 2068 }
2069 }
2070 }
2071}
2072
5e6e3a92
BZ		 2073/*
2074 * This function handles the command response of scan.
2075 *
2076 * The response buffer for the scan command has the following
2077 * memory layout:
2078 *
2079 * .-------------------------------------------------------------.
2080 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
2081 * .-------------------------------------------------------------.
2082 * | BufSize (t_u16) : sizeof the BSS Description data |
2083 * .-------------------------------------------------------------.
2084 * | NumOfSet (t_u8) : Number of BSS Descs returned |
2085 * .-------------------------------------------------------------.
2086 * | BSSDescription data (variable, size given in BufSize) |
2087 * .-------------------------------------------------------------.
2088 * | TLV data (variable, size calculated using Header->Size, |
2089 * | BufSize and sizeof the fixed fields above) |
2090 * .-------------------------------------------------------------.
2091 */
2092int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
600f5d90 2093 struct host_cmd_ds_command *resp)
5e6e3a92
BZ		 2094{
2095 int ret = 0;
2096 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8 2097 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
5e6e3a92
BZ		 2098 struct mwifiex_ie_types_data *tlv_data;
2099 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
2100 u8 *bss_info;
2101 u32 scan_resp_size;
2102 u32 bytes_left;
5e6e3a92
BZ		 2103 u32 idx;
2104 u32 tlv_buf_size;
5e6e3a92
BZ		 2105 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
2106 struct chan_band_param_set *chan_band;
5e6e3a92 2107 u8 is_bgscan_resp;
3b4d5c64
AK		 2108 __le64 fw_tsf = 0;
2109 u8 *radio_type;
7d7f07d8 2110 struct cfg80211_wowlan_nd_match *pmatch;
2111 struct cfg80211_sched_scan_request *nd_config = NULL;
5e6e3a92
BZ		 2112
2113 is_bgscan_resp = (le16_to_cpu(resp->command)
cff23cec 2114 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
5e6e3a92
BZ		 2115 if (is_bgscan_resp)
2116 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
2117 else
2118 scan_rsp = &resp->params.scan_resp;
2119
2120
67a50035 2121 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
acebe8c1
ZL		 2122 mwifiex_dbg(adapter, ERROR,
2123 "SCAN_RESP: too many AP returned (%d)\n",
2124 scan_rsp->number_of_sets);
5e6e3a92 2125 ret = -1;
8a7d7cbf 2126 goto check_next_scan;
5e6e3a92
BZ		 2127 }
2128
b887664d
AK		 2129 /* Check csa channel expiry before parsing scan response */
2130 mwifiex_11h_get_csa_closed_channel(priv);
2131
5e6e3a92 2132 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
acebe8c1
ZL		 2133 mwifiex_dbg(adapter, INFO,
2134 "info: SCAN_RESP: bss_descript_size %d\n",
2135 bytes_left);
5e6e3a92
BZ		 2136
2137 scan_resp_size = le16_to_cpu(resp->size);
2138
acebe8c1
ZL		 2139 mwifiex_dbg(adapter, INFO,
2140 "info: SCAN_RESP: returned %d APs before parsing\n",
2141 scan_rsp->number_of_sets);
5e6e3a92 2142
5e6e3a92
BZ		 2143 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
2144
2145 /*
2146 * The size of the TLV buffer is equal to the entire command response
2147 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
2148 * BSS Descriptions (bss_descript_size as bytesLef) and the command
2149 * response header (S_DS_GEN)
2150 */
2151 tlv_buf_size = scan_resp_size - (bytes_left
2152 + sizeof(scan_rsp->bss_descript_size)
2153 + sizeof(scan_rsp->number_of_sets)
2154 + S_DS_GEN);
2155
2156 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
2157 bss_desc_and_tlv_buffer +
2158 bytes_left);
2159
2160 /* Search the TLV buffer space in the scan response for any valid
2161 TLVs */
2162 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
2163 TLV_TYPE_TSFTIMESTAMP,
2164 (struct mwifiex_ie_types_data **)
2165 &tsf_tlv);
2166
2167 /* Search the TLV buffer space in the scan response for any valid
2168 TLVs */
2169 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
2170 TLV_TYPE_CHANNELBANDLIST,
2171 (struct mwifiex_ie_types_data **)
2172 &chan_band_tlv);
2173
7d7f07d8 2174#ifdef CONFIG_PM
2175 if (priv->wdev.wiphy->wowlan_config)
2176 nd_config = priv->wdev.wiphy->wowlan_config->nd_config;
2177#endif
2178
2179 if (nd_config) {
2180 adapter->nd_info =
2181 kzalloc(sizeof(struct cfg80211_wowlan_nd_match) +
2182 sizeof(struct cfg80211_wowlan_nd_match *) *
2183 scan_rsp->number_of_sets, GFP_ATOMIC);
2184
2185 if (adapter->nd_info)
2186 adapter->nd_info->n_matches = scan_rsp->number_of_sets;
2187 }
2188
5e6e3a92 2189 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
5e6e3a92
BZ		 2190 /*
2191 * If the TSF TLV was appended to the scan results, save this
b5abcf02
AK		 2192 * entry's TSF value in the fw_tsf field. It is the firmware's
2193 * TSF value at the time the beacon or probe response was
2194 * received.
5e6e3a92 2195 */
7c6fa2a8 2196 if (tsf_tlv)
b5abcf02
AK		 2197 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
2198 sizeof(fw_tsf));
7c6fa2a8 2199
3b4d5c64
AK		 2200 if (chan_band_tlv) {
2201 chan_band = &chan_band_tlv->chan_band_param[idx];
2202 radio_type = &chan_band->radio_type;
7c6fa2a8 2203 } else {
3b4d5c64 2204 radio_type = NULL;
7c6fa2a8 2205 }
3b4d5c64 2206
7d7f07d8 2207 if (chan_band_tlv && adapter->nd_info) {
2208 adapter->nd_info->matches[idx] =
b7116576
CJ		 2209 kzalloc(sizeof(*pmatch) + sizeof(u32),
2210 GFP_ATOMIC);
7d7f07d8 2211
2212 pmatch = adapter->nd_info->matches[idx];
2213
efdf0e39 2214 if (pmatch) {
b7116576
CJ		 2215 pmatch->n_channels = 1;
2216 pmatch->channels[0] = chan_band->chan_number;
7d7f07d8 2217 }
2218 }
2219
3b4d5c64
AK		 2220 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
2221 &bytes_left,
2222 le64_to_cpu(fw_tsf),
21f58d20 2223 radio_type, false, 0);
3b4d5c64
AK		 2224 if (ret)
2225 goto check_next_scan;
7c6fa2a8 2226 }
5e6e3a92 2227
8a7d7cbf 2228check_next_scan:
d44b5c2f 2229 mwifiex_check_next_scan_command(priv);
5e6e3a92
BZ		 2230 return ret;
2231}
2232
21f58d20
AK		 2233/*
2234 * This function prepares an extended scan command to be sent to the firmware
2235 *
2236 * This uses the scan command configuration sent to the command processing
2237 * module in command preparation stage to configure a extended scan command
2238 * structure to send to firmware.
2239 */
2240int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv,
2241 struct host_cmd_ds_command *cmd,
2242 void *data_buf)
2243{
2244 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan;
2245 struct mwifiex_scan_cmd_config *scan_cfg = data_buf;
2246
2247 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
2248
2249 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT);
2250
2251 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
2252 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved)
2253 + scan_cfg->tlv_buf_len + S_DS_GEN));
2254
2255 return 0;
2256}
2257
0c9b7f22
XH		 2258/* This function prepares an background scan config command to be sent
2259 * to the firmware
2260 */
2261int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv,
2262 struct host_cmd_ds_command *cmd,
2263 void *data_buf)
2264{
2265 struct host_cmd_ds_802_11_bg_scan_config *bgscan_config =
2266 &cmd->params.bg_scan_config;
2267 struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf;
2268 u8 *tlv_pos = bgscan_config->tlv;
2269 u8 num_probes;
2270 u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num;
2271 int i;
2272 struct mwifiex_ie_types_num_probes *num_probes_tlv;
2273 struct mwifiex_ie_types_repeat_count *repeat_count_tlv;
fdcab083 2274 struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv;
0c9b7f22
XH		 2275 struct mwifiex_ie_types_bgscan_start_later *start_later_tlv;
2276 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
2277 struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv;
2278 struct mwifiex_chan_scan_param_set *temp_chan;
2279
2280 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG);
2281 cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN);
2282
2283 bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action);
2284 bgscan_config->enable = bgscan_cfg_in->enable;
2285 bgscan_config->bss_type = bgscan_cfg_in->bss_type;
2286 bgscan_config->scan_interval =
2287 cpu_to_le32(bgscan_cfg_in->scan_interval);
2288 bgscan_config->report_condition =
2289 cpu_to_le32(bgscan_cfg_in->report_condition);
2290
2291 /* stop sched scan */
2292 if (!bgscan_config->enable)
2293 return 0;
2294
2295 bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan;
2296
2297 num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in->
2298 num_probes : priv->adapter->scan_probes);
2299
2300 if (num_probes) {
2301 num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos;
2302 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
2303 num_probes_tlv->header.len =
2304 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
2305 num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes);
2306
2307 tlv_pos += sizeof(num_probes_tlv->header) +
2308 le16_to_cpu(num_probes_tlv->header.len);
2309 }
2310
2311 if (bgscan_cfg_in->repeat_count) {
2312 repeat_count_tlv =
2313 (struct mwifiex_ie_types_repeat_count *)tlv_pos;
2314 repeat_count_tlv->header.type =
2315 cpu_to_le16(TLV_TYPE_REPEAT_COUNT);
2316 repeat_count_tlv->header.len =
2317 cpu_to_le16(sizeof(repeat_count_tlv->repeat_count));
2318 repeat_count_tlv->repeat_count =
2319 cpu_to_le16(bgscan_cfg_in->repeat_count);
2320
2321 tlv_pos += sizeof(repeat_count_tlv->header) +
2322 le16_to_cpu(repeat_count_tlv->header.len);
2323 }
2324
fdcab083
GB		 2325 if (bgscan_cfg_in->rssi_threshold) {
2326 rssi_threshold_tlv =
2327 (struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos;
2328 rssi_threshold_tlv->header.type =
2329 cpu_to_le16(TLV_TYPE_RSSI_LOW);
2330 rssi_threshold_tlv->header.len =
2331 cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold));
2332 rssi_threshold_tlv->rssi_threshold =
2333 cpu_to_le16(bgscan_cfg_in->rssi_threshold);
2334
2335 tlv_pos += sizeof(rssi_threshold_tlv->header) +
2336 le16_to_cpu(rssi_threshold_tlv->header.len);
2337 }
2338
0c9b7f22
XH		 2339 for (i = 0; i < bgscan_cfg_in->num_ssids; i++) {
2340 ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len;
2341
2342 wildcard_ssid_tlv =
2343 (struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos;
2344 wildcard_ssid_tlv->header.type =
2345 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
2346 wildcard_ssid_tlv->header.len = cpu_to_le16(
2347 (u16)(ssid_len + sizeof(wildcard_ssid_tlv->
2348 max_ssid_length)));
2349
2350 /* max_ssid_length = 0 tells firmware to perform
2351 * specific scan for the SSID filled, whereas
2352 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
2353 * wildcard scan.
2354 */
2355 if (ssid_len)
2356 wildcard_ssid_tlv->max_ssid_length = 0;
2357 else
2358 wildcard_ssid_tlv->max_ssid_length =
2359 IEEE80211_MAX_SSID_LEN;
2360
2361 memcpy(wildcard_ssid_tlv->ssid,
2362 bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len);
2363
2364 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
2365 + le16_to_cpu(wildcard_ssid_tlv->header.len));
2366 }
2367
2368 chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos;
2369
2370 if (bgscan_cfg_in->chan_list[0].chan_number) {
2371 dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n");
2372
2373 chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
2374
2375 for (chan_idx = 0;
2376 chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX &&
2377 bgscan_cfg_in->chan_list[chan_idx].chan_number;
2378 chan_idx++) {
2379 temp_chan = chan_list_tlv->chan_scan_param + chan_idx;
2380
2381 /* Increment the TLV header length by size appended */
5653c646
DM		 2382 le16_unaligned_add_cpu(&chan_list_tlv->header.len,
2383 sizeof(
2384 chan_list_tlv->chan_scan_param));
0c9b7f22
XH		 2385
2386 temp_chan->chan_number =
2387 bgscan_cfg_in->chan_list[chan_idx].chan_number;
2388 temp_chan->radio_type =
2389 bgscan_cfg_in->chan_list[chan_idx].radio_type;
2390
2391 scan_type =
2392 bgscan_cfg_in->chan_list[chan_idx].scan_type;
2393
2394 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
2395 temp_chan->chan_scan_mode_bitmap
2396 |= MWIFIEX_PASSIVE_SCAN;
2397 else
2398 temp_chan->chan_scan_mode_bitmap
2399 &= ~MWIFIEX_PASSIVE_SCAN;
2400
2401 if (bgscan_cfg_in->chan_list[chan_idx].scan_time) {
2402 scan_dur = (u16)bgscan_cfg_in->
2403 chan_list[chan_idx].scan_time;
2404 } else {
2405 scan_dur = (scan_type ==
2406 MWIFIEX_SCAN_TYPE_PASSIVE) ?
2407 priv->adapter->passive_scan_time :
2408 priv->adapter->specific_scan_time;
2409 }
2410
2411 temp_chan->min_scan_time = cpu_to_le16(scan_dur);
2412 temp_chan->max_scan_time = cpu_to_le16(scan_dur);
2413 }
2414 } else {
2415 dev_dbg(priv->adapter->dev,
2416 "info: bgscan: Creating full region channel list\n");
2417 chan_num =
2418 mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in,
2419 chan_list_tlv->
2420 chan_scan_param);
5653c646
DM		 2421 le16_unaligned_add_cpu(&chan_list_tlv->header.len,
2422 chan_num *
0c9b7f22
XH		 2423 sizeof(chan_list_tlv->chan_scan_param[0]));
2424 }
2425
2426 tlv_pos += (sizeof(chan_list_tlv->header)
2427 + le16_to_cpu(chan_list_tlv->header.len));
2428
2429 if (bgscan_cfg_in->start_later) {
2430 start_later_tlv =
2431 (struct mwifiex_ie_types_bgscan_start_later *)tlv_pos;
2432 start_later_tlv->header.type =
2433 cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER);
2434 start_later_tlv->header.len =
2435 cpu_to_le16(sizeof(start_later_tlv->start_later));
2436 start_later_tlv->start_later =
2437 cpu_to_le16(bgscan_cfg_in->start_later);
2438
2439 tlv_pos += sizeof(start_later_tlv->header) +
2440 le16_to_cpu(start_later_tlv->header.len);
2441 }
2442
2443 /* Append vendor specific IE TLV */
2444 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos);
2445
5653c646 2446 le16_unaligned_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv);
0c9b7f22
XH		 2447
2448 return 0;
2449}
2450
2451int mwifiex_stop_bg_scan(struct mwifiex_private *priv)
2452{
2453 struct mwifiex_bg_scan_cfg *bgscan_cfg;
2454
2455 if (!priv->sched_scanning) {
2456 dev_dbg(priv->adapter->dev, "bgscan already stopped!\n");
2457 return 0;
2458 }
2459
2460 bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL);
2461 if (!bgscan_cfg)
2462 return -ENOMEM;
2463
2464 bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA;
2465 bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET;
2466 bgscan_cfg->enable = false;
2467
2468 if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG,
2469 HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) {
2470 kfree(bgscan_cfg);
2471 return -EFAULT;
2472 }
2473
2474 kfree(bgscan_cfg);
2475 priv->sched_scanning = false;
2476
2477 return 0;
2478}
2479
bf354433
AP		 2480static void
2481mwifiex_update_chan_statistics(struct mwifiex_private *priv,
2482 struct mwifiex_ietypes_chanstats *tlv_stat)
2483{
2484 struct mwifiex_adapter *adapter = priv->adapter;
2485 u8 i, num_chan;
2486 struct mwifiex_fw_chan_stats *fw_chan_stats;
2487 struct mwifiex_chan_stats chan_stats;
2488
2489 fw_chan_stats = (void *)((u8 *)tlv_stat +
2490 sizeof(struct mwifiex_ie_types_header));
2491 num_chan = le16_to_cpu(tlv_stat->header.len) /
2492 sizeof(struct mwifiex_chan_stats);
2493
2494 for (i = 0 ; i < num_chan; i++) {
0a5aa6a2
BN		 2495 if (adapter->survey_idx >= adapter->num_in_chan_stats) {
2496 mwifiex_dbg(adapter, WARN,
2497 "FW reported too many channel results (max %d)\n",
2498 adapter->num_in_chan_stats);
2499 return;
2500 }
bf354433
AP		 2501 chan_stats.chan_num = fw_chan_stats->chan_num;
2502 chan_stats.bandcfg = fw_chan_stats->bandcfg;
2503 chan_stats.flags = fw_chan_stats->flags;
2504 chan_stats.noise = fw_chan_stats->noise;
2505 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss);
2506 chan_stats.cca_scan_dur =
2507 le16_to_cpu(fw_chan_stats->cca_scan_dur);
2508 chan_stats.cca_busy_dur =
2509 le16_to_cpu(fw_chan_stats->cca_busy_dur);
acebe8c1
ZL		 2510 mwifiex_dbg(adapter, INFO,
2511 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n",
2512 chan_stats.chan_num,
2513 chan_stats.noise,
2514 chan_stats.total_bss,
2515 chan_stats.cca_scan_dur,
2516 chan_stats.cca_busy_dur);
bf354433
AP		 2517 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats,
2518 sizeof(struct mwifiex_chan_stats));
2519 fw_chan_stats++;
2520 }
2521}
2522
21f58d20 2523/* This function handles the command response of extended scan */
bf354433
AP		 2524int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv,
2525 struct host_cmd_ds_command *resp)
21f58d20 2526{
3223db20 2527 struct mwifiex_adapter *adapter = priv->adapter;
bf354433
AP		 2528 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp;
2529 struct mwifiex_ie_types_header *tlv;
2530 struct mwifiex_ietypes_chanstats *tlv_stat;
2531 u16 buf_left, type, len;
2532
3223db20
AP		 2533 struct host_cmd_ds_command *cmd_ptr;
2534 struct cmd_ctrl_node *cmd_node;
2535 unsigned long cmd_flags, scan_flags;
2536 bool complete_scan = false;
2537
acebe8c1 2538 mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n");
21445049 2539
bf354433
AP		 2540 ext_scan_resp = &resp->params.ext_scan;
2541
2542 tlv = (void *)ext_scan_resp->tlv_buffer;
2543 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN
2544 - 1);
2545
2546 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) {
2547 type = le16_to_cpu(tlv->type);
2548 len = le16_to_cpu(tlv->len);
2549
2550 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) {
acebe8c1
ZL		 2551 mwifiex_dbg(adapter, ERROR,
2552 "error processing scan response TLVs");
bf354433
AP		 2553 break;
2554 }
2555
2556 switch (type) {
2557 case TLV_TYPE_CHANNEL_STATS:
2558 tlv_stat = (void *)tlv;
2559 mwifiex_update_chan_statistics(priv, tlv_stat);
2560 break;
2561 default:
2562 break;
2563 }
2564
2565 buf_left -= len + sizeof(struct mwifiex_ie_types_header);
2566 tlv = (void *)((u8 *)tlv + len +
2567 sizeof(struct mwifiex_ie_types_header));
2568 }
2569
3223db20
AP		 2570 spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_flags);
2571 spin_lock_irqsave(&adapter->scan_pending_q_lock, scan_flags);
2572 if (list_empty(&adapter->scan_pending_q)) {
2573 complete_scan = true;
2574 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) {
2575 cmd_ptr = (void *)cmd_node->cmd_skb->data;
2576 if (le16_to_cpu(cmd_ptr->command) ==
2577 HostCmd_CMD_802_11_SCAN_EXT) {
acebe8c1
ZL		 2578 mwifiex_dbg(adapter, INFO,
2579 "Scan pending in command pending list");
3223db20
AP		 2580 complete_scan = false;
2581 break;
2582 }
2583 }
2584 }
2585 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, scan_flags);
2586 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, cmd_flags);
2587
2588 if (complete_scan)
2589 mwifiex_complete_scan(priv);
21445049 2590
21f58d20
AK		 2591 return 0;
2592}
2593
2594/* This function This function handles the event extended scan report. It
2595 * parses extended scan results and informs to cfg80211 stack.
2596 */
2597int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv,
2598 void *buf)
2599{
2600 int ret = 0;
2601 struct mwifiex_adapter *adapter = priv->adapter;
2602 u8 *bss_info;
2603 u32 bytes_left, bytes_left_for_tlv, idx;
2604 u16 type, len;
2605 struct mwifiex_ie_types_data *tlv;
2606 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv;
2607 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv;
2608 u8 *radio_type;
2609 u64 fw_tsf = 0;
2610 s32 rssi = 0;
2611 struct mwifiex_event_scan_result *event_scan = buf;
2612 u8 num_of_set = event_scan->num_of_set;
2613 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result);
2614 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size);
2615
2616 if (num_of_set > MWIFIEX_MAX_AP) {
acebe8c1
ZL		 2617 mwifiex_dbg(adapter, ERROR,
2618 "EXT_SCAN: Invalid number of AP returned (%d)!!\n",
2619 num_of_set);
21f58d20
AK		 2620 ret = -1;
2621 goto check_next_scan;
2622 }
2623
2624 bytes_left = scan_resp_size;
acebe8c1
ZL		 2625 mwifiex_dbg(adapter, INFO,
2626 "EXT_SCAN: size %d, returned %d APs...",
2627 scan_resp_size, num_of_set);
868093a9
ZL		 2628 mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf,
2629 scan_resp_size +
2630 sizeof(struct mwifiex_event_scan_result));
21f58d20
AK		 2631
2632 tlv = (struct mwifiex_ie_types_data *)scan_resp;
2633
2634 for (idx = 0; idx < num_of_set && bytes_left; idx++) {
2635 type = le16_to_cpu(tlv->header.type);
2636 len = le16_to_cpu(tlv->header.len);
2637 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) {
acebe8c1
ZL		 2638 mwifiex_dbg(adapter, ERROR,
2639 "EXT_SCAN: Error bytes left < TLV length\n");
21f58d20
AK		 2640 break;
2641 }
2642 scan_rsp_tlv = NULL;
2643 scan_info_tlv = NULL;
2644 bytes_left_for_tlv = bytes_left;
2645
2646 /* BSS response TLV with beacon or probe response buffer
2647 * at the initial position of each descriptor
2648 */
2649 if (type != TLV_TYPE_BSS_SCAN_RSP)
2650 break;
2651
2652 bss_info = (u8 *)tlv;
2653 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv;
2654 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2655 bytes_left_for_tlv -=
2656 (len + sizeof(struct mwifiex_ie_types_header));
2657
2658 while (bytes_left_for_tlv >=
2659 sizeof(struct mwifiex_ie_types_header) &&
2660 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) {
2661 type = le16_to_cpu(tlv->header.type);
2662 len = le16_to_cpu(tlv->header.len);
2663 if (bytes_left_for_tlv <
2664 sizeof(struct mwifiex_ie_types_header) + len) {
acebe8c1
ZL		 2665 mwifiex_dbg(adapter, ERROR,
2666 "EXT_SCAN: Error in processing TLV,\t"
2667 "bytes left < TLV length\n");
21f58d20
AK		 2668 scan_rsp_tlv = NULL;
2669 bytes_left_for_tlv = 0;
2670 continue;
2671 }
2672 switch (type) {
2673 case TLV_TYPE_BSS_SCAN_INFO:
2674 scan_info_tlv =
2675 (struct mwifiex_ie_types_bss_scan_info *)tlv;
2676 if (len !=
2677 sizeof(struct mwifiex_ie_types_bss_scan_info) -
2678 sizeof(struct mwifiex_ie_types_header)) {
2679 bytes_left_for_tlv = 0;
2680 continue;
2681 }
2682 break;
2683 default:
2684 break;
2685 }
2686 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2687 bytes_left -=
2688 (len + sizeof(struct mwifiex_ie_types_header));
2689 bytes_left_for_tlv -=
2690 (len + sizeof(struct mwifiex_ie_types_header));
2691 }
2692
2693 if (!scan_rsp_tlv)
2694 break;
2695
2696 /* Advance pointer to the beacon buffer length and
2697 * update the bytes count so that the function
2698 * wlan_interpret_bss_desc_with_ie() can handle the
2699 * scan buffer withut any change
2700 */
2701 bss_info += sizeof(u16);
2702 bytes_left -= sizeof(u16);
2703
2704 if (scan_info_tlv) {
2705 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi));
2706 rssi *= 100; /* Convert dBm to mBm */
acebe8c1
ZL		 2707 mwifiex_dbg(adapter, INFO,
2708 "info: InterpretIE: RSSI=%d\n", rssi);
21f58d20
AK		 2709 fw_tsf = le64_to_cpu(scan_info_tlv->tsf);
2710 radio_type = &scan_info_tlv->radio_type;
2711 } else {
2712 radio_type = NULL;
2713 }
2714 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
2715 &bytes_left, fw_tsf,
2716 radio_type, true, rssi);
2717 if (ret)
2718 goto check_next_scan;
2719 }
2720
2721check_next_scan:
2722 if (!event_scan->more_event)
2723 mwifiex_check_next_scan_command(priv);
2724
2725 return ret;
2726}
2727
5e6e3a92
BZ		 2728/*
2729 * This function prepares command for background scan query.
2730 *
2731 * Preparation includes -
2732 * - Setting command ID and proper size
2733 * - Setting background scan flush parameter
2734 * - Ensuring correct endian-ness
2735 */
572e8f3e 2736int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
5e6e3a92
BZ		 2737{
2738 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
2739 &cmd->params.bg_scan_query;
2740
2741 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
2742 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
2743 + S_DS_GEN);
2744
2745 bg_query->flush = 1;
2746
2747 return 0;
2748}
2749
5e6e3a92
BZ		 2750/*
2751 * This function inserts scan command node to the scan pending queue.
2752 */
2753void
2754mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
2755 struct cmd_ctrl_node *cmd_node)
2756{
2757 struct mwifiex_adapter *adapter = priv->adapter;
2758 unsigned long flags;
2759
600f5d90 2760 cmd_node->wait_q_enabled = true;
efaaa8b8 2761 cmd_node->condition = &adapter->scan_wait_q_woken;
5e6e3a92
BZ		 2762 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
2763 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
2764 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2765}
2766
5e6e3a92
BZ		 2767/*
2768 * This function sends a scan command for all available channels to the
2769 * firmware, filtered on a specific SSID.
2770 */
2771static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
b9be5f39 2772 struct cfg80211_ssid *req_ssid)
5e6e3a92
BZ		 2773{
2774 struct mwifiex_adapter *adapter = priv->adapter;
dcd5c79c 2775 int ret;
5e6e3a92
BZ		 2776 struct mwifiex_user_scan_cfg *scan_cfg;
2777
600f5d90 2778 if (adapter->scan_processing) {
acebe8c1
ZL		 2779 mwifiex_dbg(adapter, WARN,
2780 "cmd: Scan already in process...\n");
dcd5c79c 2781 return -EBUSY;
5e6e3a92
BZ		 2782 }
2783
600f5d90 2784 if (priv->scan_block) {
acebe8c1
ZL		 2785 mwifiex_dbg(adapter, WARN,
2786 "cmd: Scan is blocked during association...\n");
dcd5c79c 2787 return -EBUSY;
5e6e3a92
BZ		 2788 }
2789
5e6e3a92 2790 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
0d2e7a5c 2791 if (!scan_cfg)
b53575ec 2792 return -ENOMEM;
5e6e3a92 2793
c2a8f0ff 2794 ether_addr_copy(scan_cfg->random_mac, priv->random_mac);
be0b281e
AK		 2795 scan_cfg->ssid_list = req_ssid;
2796 scan_cfg->num_ssids = 1;
5e6e3a92 2797
600f5d90 2798 ret = mwifiex_scan_networks(priv, scan_cfg);
5e6e3a92
BZ		 2799
2800 kfree(scan_cfg);
2801 return ret;
2802}
2803
2804/*
2805 * Sends IOCTL request to start a scan.
2806 *
2807 * This function allocates the IOCTL request buffer, fills it
2808 * with requisite parameters and calls the IOCTL handler.
2809 *
2810 * Scan command can be issued for both normal scan and specific SSID
2811 * scan, depending upon whether an SSID is provided or not.
2812 */
600f5d90 2813int mwifiex_request_scan(struct mwifiex_private *priv,
b9be5f39 2814 struct cfg80211_ssid *req_ssid)
5e6e3a92 2815{
270e58e8 2816 int ret;
5e6e3a92 2817
1abf9ae7 2818 if (mutex_lock_interruptible(&priv->async_mutex)) {
acebe8c1
ZL		 2819 mwifiex_dbg(priv->adapter, ERROR,
2820 "%s: acquire semaphore fail\n",
2821 __func__);
5e6e3a92
BZ		 2822 return -1;
2823 }
5e6e3a92 2824
efaaa8b8 2825 priv->adapter->scan_wait_q_woken = false;
5e6e3a92
BZ		 2826
2827 if (req_ssid && req_ssid->ssid_len != 0)
2828 /* Specific SSID scan */
600f5d90 2829 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
5e6e3a92
BZ		 2830 else
2831 /* Normal scan */
600f5d90
AK		 2832 ret = mwifiex_scan_networks(priv, NULL);
2833
1abf9ae7 2834 mutex_unlock(&priv->async_mutex);
600f5d90 2835
5e6e3a92
BZ		 2836 return ret;
2837}
2838
2839/*
2840 * This function appends the vendor specific IE TLV to a buffer.
2841 */
2842int
2843mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
2844 u16 vsie_mask, u8 **buffer)
2845{
2846 int id, ret_len = 0;
2847 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
2848
2849 if (!buffer)
2850 return 0;
2851 if (!(*buffer))
2852 return 0;
2853
2854 /*
2855 * Traverse through the saved vendor specific IE array and append
2856 * the selected(scan/assoc/adhoc) IE as TLV to the command
2857 */
2858 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
2859 if (priv->vs_ie[id].mask & vsie_mask) {
2860 vs_param_set =
2861 (struct mwifiex_ie_types_vendor_param_set *)
2862 *buffer;
2863 vs_param_set->header.type =
2864 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
2865 vs_param_set->header.len =
2866 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
2867 & 0x00FF) + 2);
2868 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
2869 le16_to_cpu(vs_param_set->header.len));
2870 *buffer += le16_to_cpu(vs_param_set->header.len) +
2871 sizeof(struct mwifiex_ie_types_header);
2872 ret_len += le16_to_cpu(vs_param_set->header.len) +
2873 sizeof(struct mwifiex_ie_types_header);
2874 }
2875 }
2876 return ret_len;
2877}
2878
2879/*
2880 * This function saves a beacon buffer of the current BSS descriptor.
2881 *
2882 * The current beacon buffer is saved so that it can be restored in the
2883 * following cases that makes the beacon buffer not to contain the current
2884 * ssid's beacon buffer.
2885 * - The current ssid was not found somehow in the last scan.
2886 * - The current ssid was the last entry of the scan table and overloaded.
2887 */
2888void
2889mwifiex_save_curr_bcn(struct mwifiex_private *priv)
2890{
2891 struct mwifiex_bssdescriptor *curr_bss =
2892 &priv->curr_bss_params.bss_descriptor;
2893
030fe797
AK		 2894 if (!curr_bss->beacon_buf_size)
2895 return;
5e6e3a92 2896
030fe797
AK		 2897 /* allocate beacon buffer at 1st time; or if it's size has changed */
2898 if (!priv->curr_bcn_buf ||
cff23cec 2899 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
5e6e3a92 2900 priv->curr_bcn_size = curr_bss->beacon_buf_size;
5e6e3a92 2901
030fe797 2902 kfree(priv->curr_bcn_buf);
5982b47a 2903 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
cff23cec 2904 GFP_ATOMIC);
0d2e7a5c 2905 if (!priv->curr_bcn_buf)
030fe797 2906 return;
5e6e3a92 2907 }
030fe797
AK		 2908
2909 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
cff23cec 2910 curr_bss->beacon_buf_size);
acebe8c1
ZL		 2911 mwifiex_dbg(priv->adapter, INFO,
2912 "info: current beacon saved %d\n",
2913 priv->curr_bcn_size);
7c6fa2a8
AK		 2914
2915 curr_bss->beacon_buf = priv->curr_bcn_buf;
2916
2917 /* adjust the pointers in the current BSS descriptor */
2918 if (curr_bss->bcn_wpa_ie)
2919 curr_bss->bcn_wpa_ie =
2920 (struct ieee_types_vendor_specific *)
2921 (curr_bss->beacon_buf +
2922 curr_bss->wpa_offset);
2923
2924 if (curr_bss->bcn_rsn_ie)
2925 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2926 (curr_bss->beacon_buf +
2927 curr_bss->rsn_offset);
2928
2929 if (curr_bss->bcn_ht_cap)
2930 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2931 (curr_bss->beacon_buf +
2932 curr_bss->ht_cap_offset);
2933
074d46d1
JB		 2934 if (curr_bss->bcn_ht_oper)
2935 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
7c6fa2a8
AK		 2936 (curr_bss->beacon_buf +
2937 curr_bss->ht_info_offset);
2938
a5f39056 2939 if (curr_bss->bcn_vht_cap)
d5124648
AK		 2940 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf +
2941 curr_bss->vht_cap_offset);
a5f39056
YAP		 2942
2943 if (curr_bss->bcn_vht_oper)
d5124648
AK		 2944 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf +
2945 curr_bss->vht_info_offset);
a5f39056 2946
7c6fa2a8
AK		 2947 if (curr_bss->bcn_bss_co_2040)
2948 curr_bss->bcn_bss_co_2040 =
2c208890 2949 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
7c6fa2a8
AK		 2950
2951 if (curr_bss->bcn_ext_cap)
2c208890
JP		 2952 curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
2953 curr_bss->ext_cap_offset;
a5f39056
YAP		 2954
2955 if (curr_bss->oper_mode)
2956 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
2957 curr_bss->oper_mode_offset);
5e6e3a92
BZ		 2958}
2959
2960/*
2961 * This function frees the current BSS descriptor beacon buffer.
2962 */
2963void
2964mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2965{
2966 kfree(priv->curr_bcn_buf);
2967 priv->curr_bcn_buf = NULL;
2968}
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