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mwifiex: do not declare wdev as pointer
[deliverable/linux.git] / drivers / net / wireless / 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
79/*
80 * This function parses a given IE for a given OUI.
81 *
82 * This is used to parse a WPA/RSN IE to find if it has
83 * a given oui in PTK.
84 */
85static u8
86mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
87{
88 u8 count;
89
90 count = iebody->ptk_cnt[0];
91
92 /* There could be multiple OUIs for PTK hence
93 1) Take the length.
94 2) Check all the OUIs for AES.
95 3) If one of them is AES then pass success. */
96 while (count) {
97 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
98 return MWIFIEX_OUI_PRESENT;
99
100 --count;
101 if (count)
102 iebody = (struct ie_body *) ((u8 *) iebody +
103 sizeof(iebody->ptk_body));
104 }
105
106 pr_debug("info: %s: OUI is not found in PTK\n", __func__);
107 return MWIFIEX_OUI_NOT_PRESENT;
108}
109
110/*
111 * This function checks if a given OUI is present in a RSN IE.
112 *
113 * The function first checks if a RSN IE is present or not in the
114 * BSS descriptor. It tries to locate the OUI only if such an IE is
115 * present.
116 */
117static u8
118mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
119{
270e58e8
YAP		 120 u8 *oui;
121 struct ie_body *iebody;
5e6e3a92
BZ		 122 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
123
124 if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
125 ieee_hdr.element_id == WLAN_EID_RSN))) {
126 iebody = (struct ie_body *)
127 (((u8 *) bss_desc->bcn_rsn_ie->data) +
cff23cec 128 RSN_GTK_OUI_OFFSET);
5e6e3a92
BZ		 129 oui = &mwifiex_rsn_oui[cipher][0];
130 ret = mwifiex_search_oui_in_ie(iebody, oui);
131 if (ret)
132 return ret;
133 }
134 return ret;
135}
136
137/*
138 * This function checks if a given OUI is present in a WPA IE.
139 *
140 * The function first checks if a WPA IE is present or not in the
141 * BSS descriptor. It tries to locate the OUI only if such an IE is
142 * present.
143 */
144static u8
145mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
146{
270e58e8
YAP		 147 u8 *oui;
148 struct ie_body *iebody;
5e6e3a92
BZ		 149 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
150
cff23cec
YAP		 151 if (((bss_desc->bcn_wpa_ie) &&
152 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
04b2312a 153 WLAN_EID_VENDOR_SPECIFIC))) {
5e6e3a92
BZ		 154 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
155 oui = &mwifiex_wpa_oui[cipher][0];
156 ret = mwifiex_search_oui_in_ie(iebody, oui);
157 if (ret)
158 return ret;
159 }
160 return ret;
161}
162
163/*
164 * This function compares two SSIDs and checks if they match.
165 */
166s32
b9be5f39 167mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
5e6e3a92
BZ		 168{
169 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
170 return -1;
171 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
172}
173
5e6e3a92
BZ		 174/*
175 * This function checks if wapi is enabled in driver and scanned network is
176 * compatible with it.
177 */
178static bool
cff23cec
YAP		 179mwifiex_is_bss_wapi(struct mwifiex_private *priv,
180 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92
BZ		 181{
182 if (priv->sec_info.wapi_enabled &&
183 (bss_desc->bcn_wapi_ie &&
184 ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
185 WLAN_EID_BSS_AC_ACCESS_DELAY))) {
186 return true;
187 }
188 return false;
189}
190
191/*
192 * This function checks if driver is configured with no security mode and
193 * scanned network is compatible with it.
194 */
195static bool
cff23cec
YAP		 196mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
197 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 198{
5eb02e44
AK		 199 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
200 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
5e6e3a92 201 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
04b2312a 202 WLAN_EID_VENDOR_SPECIFIC)) &&
cff23cec 203 ((!bss_desc->bcn_rsn_ie) ||
5e6e3a92 204 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
cff23cec
YAP		 205 WLAN_EID_RSN)) &&
206 !priv->sec_info.encryption_mode && !bss_desc->privacy) {
5e6e3a92
BZ		 207 return true;
208 }
209 return false;
210}
211
212/*
213 * This function checks if static WEP is enabled in driver and scanned network
214 * is compatible with it.
215 */
216static bool
cff23cec
YAP		 217mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
218 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 219{
5eb02e44
AK		 220 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
221 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
5e6e3a92
BZ		 222 return true;
223 }
224 return false;
225}
226
227/*
228 * This function checks if wpa is enabled in driver and scanned network is
229 * compatible with it.
230 */
231static bool
cff23cec
YAP		 232mwifiex_is_bss_wpa(struct mwifiex_private *priv,
233 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 234{
5eb02e44
AK		 235 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
236 !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
04b2312a
AS		 237 ((*(bss_desc->bcn_wpa_ie)).
238 vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC))
5e6e3a92
BZ		 239 /*
240 * Privacy bit may NOT be set in some APs like
241 * LinkSys WRT54G && bss_desc->privacy
242 */
243 ) {
7c6fa2a8 244 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
5e6e3a92 245 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
7c6fa2a8 246 "EncMode=%#x privacy=%#x\n", __func__,
5e6e3a92
BZ		 247 (bss_desc->bcn_wpa_ie) ?
248 (*(bss_desc->bcn_wpa_ie)).
249 vend_hdr.element_id : 0,
250 (bss_desc->bcn_rsn_ie) ?
251 (*(bss_desc->bcn_rsn_ie)).
252 ieee_hdr.element_id : 0,
5eb02e44 253 (priv->sec_info.wep_enabled) ? "e" : "d",
5e6e3a92
BZ		 254 (priv->sec_info.wpa_enabled) ? "e" : "d",
255 (priv->sec_info.wpa2_enabled) ? "e" : "d",
256 priv->sec_info.encryption_mode,
257 bss_desc->privacy);
258 return true;
259 }
260 return false;
261}
262
263/*
264 * This function checks if wpa2 is enabled in driver and scanned network is
265 * compatible with it.
266 */
267static bool
cff23cec
YAP		 268mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
269 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 270{
cff23cec
YAP		 271 if (!priv->sec_info.wep_enabled &&
272 !priv->sec_info.wpa_enabled &&
273 priv->sec_info.wpa2_enabled &&
274 ((bss_desc->bcn_rsn_ie) &&
275 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
276 /*
277 * Privacy bit may NOT be set in some APs like
278 * LinkSys WRT54G && bss_desc->privacy
279 */
7c6fa2a8 280 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
5e6e3a92 281 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
7c6fa2a8 282 "EncMode=%#x privacy=%#x\n", __func__,
5e6e3a92
BZ		 283 (bss_desc->bcn_wpa_ie) ?
284 (*(bss_desc->bcn_wpa_ie)).
285 vend_hdr.element_id : 0,
286 (bss_desc->bcn_rsn_ie) ?
287 (*(bss_desc->bcn_rsn_ie)).
288 ieee_hdr.element_id : 0,
5eb02e44 289 (priv->sec_info.wep_enabled) ? "e" : "d",
5e6e3a92
BZ		 290 (priv->sec_info.wpa_enabled) ? "e" : "d",
291 (priv->sec_info.wpa2_enabled) ? "e" : "d",
292 priv->sec_info.encryption_mode,
293 bss_desc->privacy);
294 return true;
295 }
296 return false;
297}
298
299/*
300 * This function checks if adhoc AES is enabled in driver and scanned network is
301 * compatible with it.
302 */
303static bool
cff23cec
YAP		 304mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
305 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 306{
5eb02e44 307 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec
YAP		 308 !priv->sec_info.wpa2_enabled &&
309 ((!bss_desc->bcn_wpa_ie) ||
04b2312a
AS		 310 ((*(bss_desc->bcn_wpa_ie)).
311 vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
cff23cec
YAP		 312 ((!bss_desc->bcn_rsn_ie) ||
313 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
314 !priv->sec_info.encryption_mode && bss_desc->privacy) {
5e6e3a92
BZ		 315 return true;
316 }
317 return false;
318}
319
320/*
321 * This function checks if dynamic WEP is enabled in driver and scanned network
322 * is compatible with it.
323 */
324static bool
cff23cec
YAP		 325mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
326 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 327{
5eb02e44 328 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec
YAP		 329 !priv->sec_info.wpa2_enabled &&
330 ((!bss_desc->bcn_wpa_ie) ||
04b2312a
AS		 331 ((*(bss_desc->bcn_wpa_ie)).
332 vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
cff23cec
YAP		 333 ((!bss_desc->bcn_rsn_ie) ||
334 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
335 priv->sec_info.encryption_mode && bss_desc->privacy) {
5e6e3a92 336 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
7c6fa2a8 337 "WEP: wpa_ie=%#x wpa2_ie=%#x "
5e6e3a92 338 "EncMode=%#x privacy=%#x\n",
7c6fa2a8 339 __func__,
5e6e3a92
BZ		 340 (bss_desc->bcn_wpa_ie) ?
341 (*(bss_desc->bcn_wpa_ie)).
342 vend_hdr.element_id : 0,
343 (bss_desc->bcn_rsn_ie) ?
344 (*(bss_desc->bcn_rsn_ie)).
345 ieee_hdr.element_id : 0,
346 priv->sec_info.encryption_mode,
347 bss_desc->privacy);
348 return true;
349 }
350 return false;
351}
352
353/*
354 * This function checks if a scanned network is compatible with the driver
355 * settings.
356 *
357 * WEP WPA WPA2 ad-hoc encrypt Network
358 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
359 * 0 0 0 0 NONE 0 0 0 yes No security
360 * 0 1 0 0 x 1x 1 x yes WPA (disable
361 * HT if no AES)
362 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
363 * HT if no AES)
364 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
365 * 1 0 0 0 NONE 1 0 0 yes Static WEP
366 * (disable HT)
367 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
368 *
369 * Compatibility is not matched while roaming, except for mode.
370 */
371static s32
7c6fa2a8
AK		 372mwifiex_is_network_compatible(struct mwifiex_private *priv,
373 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
5e6e3a92
BZ		 374{
375 struct mwifiex_adapter *adapter = priv->adapter;
5e6e3a92 376
5e6e3a92
BZ		 377 bss_desc->disable_11n = false;
378
379 /* Don't check for compatibility if roaming */
cff23cec
YAP		 380 if (priv->media_connected &&
381 (priv->bss_mode == NL80211_IFTYPE_STATION) &&
382 (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
7c6fa2a8 383 return 0;
5e6e3a92
BZ		 384
385 if (priv->wps.session_enable) {
386 dev_dbg(adapter->dev,
387 "info: return success directly in WPS period\n");
7c6fa2a8 388 return 0;
5e6e3a92
BZ		 389 }
390
2a7305c8
AK		 391 if (bss_desc->chan_sw_ie_present) {
392 dev_err(adapter->dev,
393 "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
394 return -1;
395 }
396
cff23cec 397 if (mwifiex_is_bss_wapi(priv, bss_desc)) {
5e6e3a92 398 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
7c6fa2a8 399 return 0;
5e6e3a92
BZ		 400 }
401
402 if (bss_desc->bss_mode == mode) {
cff23cec 403 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
5e6e3a92 404 /* No security */
7c6fa2a8 405 return 0;
cff23cec 406 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
5e6e3a92
BZ		 407 /* Static WEP enabled */
408 dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
409 bss_desc->disable_11n = true;
7c6fa2a8 410 return 0;
cff23cec 411 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
5e6e3a92 412 /* WPA enabled */
cff23cec
YAP		 413 if (((priv->adapter->config_bands & BAND_GN ||
414 priv->adapter->config_bands & BAND_AN) &&
415 bss_desc->bcn_ht_cap) &&
416 !mwifiex_is_wpa_oui_present(bss_desc,
417 CIPHER_SUITE_CCMP)) {
418
419 if (mwifiex_is_wpa_oui_present
420 (bss_desc, CIPHER_SUITE_TKIP)) {
5e6e3a92
BZ		 421 dev_dbg(adapter->dev,
422 "info: Disable 11n if AES "
423 "is not supported by AP\n");
424 bss_desc->disable_11n = true;
425 } else {
426 return -1;
427 }
428 }
7c6fa2a8 429 return 0;
cff23cec 430 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
5e6e3a92 431 /* WPA2 enabled */
cff23cec
YAP		 432 if (((priv->adapter->config_bands & BAND_GN ||
433 priv->adapter->config_bands & BAND_AN) &&
434 bss_desc->bcn_ht_cap) &&
435 !mwifiex_is_rsn_oui_present(bss_desc,
436 CIPHER_SUITE_CCMP)) {
437
438 if (mwifiex_is_rsn_oui_present
439 (bss_desc, CIPHER_SUITE_TKIP)) {
5e6e3a92
BZ		 440 dev_dbg(adapter->dev,
441 "info: Disable 11n if AES "
442 "is not supported by AP\n");
443 bss_desc->disable_11n = true;
444 } else {
445 return -1;
446 }
447 }
7c6fa2a8 448 return 0;
cff23cec 449 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
5e6e3a92 450 /* Ad-hoc AES enabled */
7c6fa2a8 451 return 0;
cff23cec 452 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
5e6e3a92 453 /* Dynamic WEP enabled */
7c6fa2a8 454 return 0;
5e6e3a92
BZ		 455 }
456
457 /* Security doesn't match */
cff23cec
YAP		 458 dev_dbg(adapter->dev,
459 "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s "
460 "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__,
461 (bss_desc->bcn_wpa_ie) ?
462 (*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id : 0,
463 (bss_desc->bcn_rsn_ie) ?
464 (*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id : 0,
465 (priv->sec_info.wep_enabled) ? "e" : "d",
466 (priv->sec_info.wpa_enabled) ? "e" : "d",
467 (priv->sec_info.wpa2_enabled) ? "e" : "d",
468 priv->sec_info.encryption_mode, bss_desc->privacy);
5e6e3a92
BZ		 469 return -1;
470 }
471
472 /* Mode doesn't match */
473 return -1;
474}
475
5e6e3a92
BZ		 476/*
477 * This function creates a channel list for the driver to scan, based
478 * on region/band information.
479 *
480 * This routine is used for any scan that is not provided with a
481 * specific channel list to scan.
482 */
658f37b7 483static int
5e6e3a92 484mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
cff23cec
YAP		 485 const struct mwifiex_user_scan_cfg
486 *user_scan_in,
487 struct mwifiex_chan_scan_param_set
488 *scan_chan_list,
489 u8 filtered_scan)
5e6e3a92
BZ		 490{
491 enum ieee80211_band band;
492 struct ieee80211_supported_band *sband;
493 struct ieee80211_channel *ch;
494 struct mwifiex_adapter *adapter = priv->adapter;
495 int chan_idx = 0, i;
5e6e3a92
BZ		 496
497 for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
498
4facc34a 499 if (!priv->wdev.wiphy->bands[band])
5e6e3a92
BZ		 500 continue;
501
4facc34a 502 sband = priv->wdev.wiphy->bands[band];
5e6e3a92 503
d06b7b9e 504 for (i = 0; (i < sband->n_channels) ; i++) {
5e6e3a92
BZ		 505 ch = &sband->channels[i];
506 if (ch->flags & IEEE80211_CHAN_DISABLED)
507 continue;
508 scan_chan_list[chan_idx].radio_type = band;
186630c2 509
5e6e3a92 510 if (user_scan_in &&
cff23cec 511 user_scan_in->chan_list[0].scan_time)
5e6e3a92
BZ		 512 scan_chan_list[chan_idx].max_scan_time =
513 cpu_to_le16((u16) user_scan_in->
514 chan_list[0].scan_time);
8fe02e16 515 else if (ch->flags & IEEE80211_CHAN_NO_IR)
5e6e3a92
BZ		 516 scan_chan_list[chan_idx].max_scan_time =
517 cpu_to_le16(adapter->passive_scan_time);
518 else
519 scan_chan_list[chan_idx].max_scan_time =
520 cpu_to_le16(adapter->active_scan_time);
186630c2 521
8fe02e16 522 if (ch->flags & IEEE80211_CHAN_NO_IR)
5e6e3a92
BZ		 523 scan_chan_list[chan_idx].chan_scan_mode_bitmap
524 |= MWIFIEX_PASSIVE_SCAN;
525 else
526 scan_chan_list[chan_idx].chan_scan_mode_bitmap
527 &= ~MWIFIEX_PASSIVE_SCAN;
528 scan_chan_list[chan_idx].chan_number =
529 (u32) ch->hw_value;
530 if (filtered_scan) {
531 scan_chan_list[chan_idx].max_scan_time =
532 cpu_to_le16(adapter->specific_scan_time);
533 scan_chan_list[chan_idx].chan_scan_mode_bitmap
534 |= MWIFIEX_DISABLE_CHAN_FILT;
535 }
d06b7b9e 536 chan_idx++;
5e6e3a92
BZ		 537 }
538
539 }
658f37b7 540 return chan_idx;
5e6e3a92
BZ		 541}
542
78dfca62
AP		 543/* This function appends rate TLV to scan config command. */
544static int
545mwifiex_append_rate_tlv(struct mwifiex_private *priv,
546 struct mwifiex_scan_cmd_config *scan_cfg_out,
547 u8 radio)
548{
549 struct mwifiex_ie_types_rates_param_set *rates_tlv;
550 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos;
551 u32 rates_size;
552
553 memset(rates, 0, sizeof(rates));
554
555 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len;
556
557 if (priv->scan_request)
558 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates,
559 radio);
560 else
561 rates_size = mwifiex_get_supported_rates(priv, rates);
562
563 dev_dbg(priv->adapter->dev, "info: SCAN_CMD: Rates size = %d\n",
564 rates_size);
565 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos;
566 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
567 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
568 memcpy(rates_tlv->rates, rates, rates_size);
569 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size;
570
571 return rates_size;
572}
573
5e6e3a92
BZ		 574/*
575 * This function constructs and sends multiple scan config commands to
576 * the firmware.
577 *
578 * Previous routines in the code flow have created a scan command configuration
579 * with any requested TLVs. This function splits the channel TLV into maximum
580 * channels supported per scan lists and sends the portion of the channel TLV,
581 * along with the other TLVs, to the firmware.
582 */
583static int
600f5d90 584mwifiex_scan_channel_list(struct mwifiex_private *priv,
5e6e3a92
BZ		 585 u32 max_chan_per_scan, u8 filtered_scan,
586 struct mwifiex_scan_cmd_config *scan_cfg_out,
587 struct mwifiex_ie_types_chan_list_param_set
588 *chan_tlv_out,
589 struct mwifiex_chan_scan_param_set *scan_chan_list)
590{
1845bd3a 591 struct mwifiex_adapter *adapter = priv->adapter;
5e6e3a92
BZ		 592 int ret = 0;
593 struct mwifiex_chan_scan_param_set *tmp_chan_list;
594 struct mwifiex_chan_scan_param_set *start_chan;
1845bd3a
AK		 595 struct cmd_ctrl_node *cmd_node, *tmp_node;
596 unsigned long flags;
21f58d20 597 u32 tlv_idx, rates_size, cmd_no;
5e6e3a92
BZ		 598 u32 total_scan_time;
599 u32 done_early;
78dfca62 600 u8 radio_type;
5e6e3a92
BZ		 601
602 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
603 dev_dbg(priv->adapter->dev,
604 "info: Scan: Null detect: %p, %p, %p\n",
605 scan_cfg_out, chan_tlv_out, scan_chan_list);
606 return -1;
607 }
608
b887664d
AK		 609 /* Check csa channel expiry before preparing scan list */
610 mwifiex_11h_get_csa_closed_channel(priv);
611
5e6e3a92
BZ		 612 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
613
614 /* Set the temp channel struct pointer to the start of the desired
615 list */
616 tmp_chan_list = scan_chan_list;
617
618 /* Loop through the desired channel list, sending a new firmware scan
619 commands for each max_chan_per_scan channels (or for 1,6,11
620 individually if configured accordingly) */
621 while (tmp_chan_list->chan_number) {
622
623 tlv_idx = 0;
624 total_scan_time = 0;
78dfca62 625 radio_type = 0;
5e6e3a92
BZ		 626 chan_tlv_out->header.len = 0;
627 start_chan = tmp_chan_list;
628 done_early = false;
629
630 /*
631 * Construct the Channel TLV for the scan command. Continue to
632 * insert channel TLVs until:
633 * - the tlv_idx hits the maximum configured per scan command
634 * - the next channel to insert is 0 (end of desired channel
635 * list)
636 * - done_early is set (controlling individual scanning of
637 * 1,6,11)
638 */
cff23cec
YAP		 639 while (tlv_idx < max_chan_per_scan &&
640 tmp_chan_list->chan_number && !done_early) {
5e6e3a92 641
b887664d
AK		 642 if (tmp_chan_list->chan_number == priv->csa_chan) {
643 tmp_chan_list++;
644 continue;
645 }
646
78dfca62 647 radio_type = tmp_chan_list->radio_type;
5e6e3a92
BZ		 648 dev_dbg(priv->adapter->dev,
649 "info: Scan: Chan(%3d), Radio(%d),"
650 " Mode(%d, %d), Dur(%d)\n",
cff23cec
YAP		 651 tmp_chan_list->chan_number,
652 tmp_chan_list->radio_type,
653 tmp_chan_list->chan_scan_mode_bitmap
654 & MWIFIEX_PASSIVE_SCAN,
655 (tmp_chan_list->chan_scan_mode_bitmap
656 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
657 le16_to_cpu(tmp_chan_list->max_scan_time));
5e6e3a92
BZ		 658
659 /* Copy the current channel TLV to the command being
660 prepared */
661 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
662 tmp_chan_list,
663 sizeof(chan_tlv_out->chan_scan_param));
664
665 /* Increment the TLV header length by the size
666 appended */
5570a914
WY		 667 le16_add_cpu(&chan_tlv_out->header.len,
668 sizeof(chan_tlv_out->chan_scan_param));
5e6e3a92
BZ		 669
670 /*
671 * The tlv buffer length is set to the number of bytes
672 * of the between the channel tlv pointer and the start
673 * of the tlv buffer. This compensates for any TLVs
674 * that were appended before the channel list.
675 */
676 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
677 scan_cfg_out->tlv_buf);
678
679 /* Add the size of the channel tlv header and the data
680 length */
681 scan_cfg_out->tlv_buf_len +=
682 (sizeof(chan_tlv_out->header)
683 + le16_to_cpu(chan_tlv_out->header.len));
684
685 /* Increment the index to the channel tlv we are
686 constructing */
687 tlv_idx++;
688
689 /* Count the total scan time per command */
690 total_scan_time +=
691 le16_to_cpu(tmp_chan_list->max_scan_time);
692
693 done_early = false;
694
695 /* Stop the loop if the *current* channel is in the
696 1,6,11 set and we are not filtering on a BSSID
697 or SSID. */
cff23cec
YAP		 698 if (!filtered_scan &&
699 (tmp_chan_list->chan_number == 1 ||
700 tmp_chan_list->chan_number == 6 ||
701 tmp_chan_list->chan_number == 11))
5e6e3a92
BZ		 702 done_early = true;
703
704 /* Increment the tmp pointer to the next channel to
705 be scanned */
706 tmp_chan_list++;
707
708 /* Stop the loop if the *next* channel is in the 1,6,11
709 set. This will cause it to be the only channel
710 scanned on the next interation */
cff23cec
YAP		 711 if (!filtered_scan &&
712 (tmp_chan_list->chan_number == 1 ||
713 tmp_chan_list->chan_number == 6 ||
714 tmp_chan_list->chan_number == 11))
5e6e3a92
BZ		 715 done_early = true;
716 }
717
718 /* The total scan time should be less than scan command timeout
719 value */
720 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
721 dev_err(priv->adapter->dev, "total scan time %dms"
722 " is over limit (%dms), scan skipped\n",
723 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
724 ret = -1;
725 break;
726 }
727
78dfca62
AP		 728 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out,
729 radio_type);
730
5e6e3a92
BZ		 731 priv->adapter->scan_channels = start_chan;
732
733 /* Send the scan command to the firmware with the specified
734 cfg */
21f58d20
AK		 735 if (priv->adapter->ext_scan)
736 cmd_no = HostCmd_CMD_802_11_SCAN_EXT;
737 else
738 cmd_no = HostCmd_CMD_802_11_SCAN;
739
fa0ecbb9
BZ		 740 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET,
741 0, scan_cfg_out, false);
78dfca62
AP		 742
743 /* rate IE is updated per scan command but same starting
744 * pointer is used each time so that rate IE from earlier
745 * scan_cfg_out->buf is overwritten with new one.
746 */
747 scan_cfg_out->tlv_buf_len -=
748 sizeof(struct mwifiex_ie_types_header) + rates_size;
749
1845bd3a
AK		 750 if (ret) {
751 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
752 list_for_each_entry_safe(cmd_node, tmp_node,
753 &adapter->scan_pending_q,
754 list) {
755 list_del(&cmd_node->list);
756 cmd_node->wait_q_enabled = false;
757 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
758 }
759 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
760 flags);
5e6e3a92 761 break;
1845bd3a 762 }
5e6e3a92
BZ		 763 }
764
765 if (ret)
766 return -1;
767
768 return 0;
769}
770
771/*
772 * This function constructs a scan command configuration structure to use
773 * in scan commands.
774 *
775 * Application layer or other functions can invoke network scanning
776 * with a scan configuration supplied in a user scan configuration structure.
777 * This structure is used as the basis of one or many scan command configuration
778 * commands that are sent to the command processing module and eventually to the
779 * firmware.
780 *
781 * This function creates a scan command configuration structure based on the
782 * following user supplied parameters (if present):
783 * - SSID filter
784 * - BSSID filter
785 * - Number of Probes to be sent
786 * - Channel list
787 *
788 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
789 * If the number of probes is not set, adapter default setting is used.
790 */
791static void
cff23cec
YAP		 792mwifiex_config_scan(struct mwifiex_private *priv,
793 const struct mwifiex_user_scan_cfg *user_scan_in,
794 struct mwifiex_scan_cmd_config *scan_cfg_out,
795 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
796 struct mwifiex_chan_scan_param_set *scan_chan_list,
797 u8 *max_chan_per_scan, u8 *filtered_scan,
798 u8 *scan_current_only)
5e6e3a92
BZ		 799{
800 struct mwifiex_adapter *adapter = priv->adapter;
801 struct mwifiex_ie_types_num_probes *num_probes_tlv;
cb91be87 802 struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv;
5e6e3a92 803 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
21f58d20 804 struct mwifiex_ie_types_bssid_list *bssid_tlv;
5e6e3a92
BZ		 805 u8 *tlv_pos;
806 u32 num_probes;
807 u32 ssid_len;
808 u32 chan_idx;
658f37b7 809 u32 chan_num;
5e6e3a92
BZ		 810 u32 scan_type;
811 u16 scan_dur;
812 u8 channel;
813 u8 radio_type;
be0b281e 814 int i;
5e6e3a92 815 u8 ssid_filter;
5e6e3a92
BZ		 816 struct mwifiex_ie_types_htcap *ht_cap;
817
818 /* The tlv_buf_len is calculated for each scan command. The TLVs added
819 in this routine will be preserved since the routine that sends the
820 command will append channelTLVs at *chan_list_out. The difference
821 between the *chan_list_out and the tlv_buf start will be used to
822 calculate the size of anything we add in this routine. */
823 scan_cfg_out->tlv_buf_len = 0;
824
825 /* Running tlv pointer. Assigned to chan_list_out at end of function
826 so later routines know where channels can be added to the command
827 buf */
828 tlv_pos = scan_cfg_out->tlv_buf;
829
830 /* Initialize the scan as un-filtered; the flag is later set to TRUE
831 below if a SSID or BSSID filter is sent in the command */
832 *filtered_scan = false;
833
834 /* Initialize the scan as not being only on the current channel. If
835 the channel list is customized, only contains one channel, and is
836 the active channel, this is set true and data flow is not halted. */
837 *scan_current_only = false;
838
839 if (user_scan_in) {
840
841 /* Default the ssid_filter flag to TRUE, set false under
842 certain wildcard conditions and qualified by the existence
843 of an SSID list before marking the scan as filtered */
844 ssid_filter = true;
845
846 /* Set the BSS type scan filter, use Adapter setting if
847 unset */
848 scan_cfg_out->bss_mode =
849 (user_scan_in->bss_mode ? (u8) user_scan_in->
850 bss_mode : (u8) adapter->scan_mode);
851
852 /* Set the number of probes to send, use Adapter setting
853 if unset */
854 num_probes =
855 (user_scan_in->num_probes ? user_scan_in->
856 num_probes : adapter->scan_probes);
857
858 /*
859 * Set the BSSID filter to the incoming configuration,
860 * if non-zero. If not set, it will remain disabled
861 * (all zeros).
862 */
863 memcpy(scan_cfg_out->specific_bssid,
864 user_scan_in->specific_bssid,
865 sizeof(scan_cfg_out->specific_bssid));
866
21f58d20
AK		 867 if (adapter->ext_scan &&
868 !is_zero_ether_addr(scan_cfg_out->specific_bssid)) {
869 bssid_tlv =
870 (struct mwifiex_ie_types_bssid_list *)tlv_pos;
871 bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID);
872 bssid_tlv->header.len = cpu_to_le16(ETH_ALEN);
873 memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid,
874 ETH_ALEN);
875 tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list);
876 }
877
be0b281e
AK		 878 for (i = 0; i < user_scan_in->num_ssids; i++) {
879 ssid_len = user_scan_in->ssid_list[i].ssid_len;
5e6e3a92
BZ		 880
881 wildcard_ssid_tlv =
882 (struct mwifiex_ie_types_wildcard_ssid_params *)
883 tlv_pos;
884 wildcard_ssid_tlv->header.type =
885 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
886 wildcard_ssid_tlv->header.len = cpu_to_le16(
887 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
888 max_ssid_length)));
fada1058 889
be0b281e
AK		 890 /*
891 * max_ssid_length = 0 tells firmware to perform
892 * specific scan for the SSID filled, whereas
893 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
894 * wildcard scan.
895 */
896 if (ssid_len)
897 wildcard_ssid_tlv->max_ssid_length = 0;
898 else
899 wildcard_ssid_tlv->max_ssid_length =
900 IEEE80211_MAX_SSID_LEN;
5e6e3a92
BZ		 901
902 memcpy(wildcard_ssid_tlv->ssid,
be0b281e 903 user_scan_in->ssid_list[i].ssid, ssid_len);
5e6e3a92
BZ		 904
905 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
906 + le16_to_cpu(wildcard_ssid_tlv->header.len));
907
be0b281e
AK		 908 dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
909 i, wildcard_ssid_tlv->ssid,
5e6e3a92
BZ		 910 wildcard_ssid_tlv->max_ssid_length);
911
912 /* Empty wildcard ssid with a maxlen will match many or
913 potentially all SSIDs (maxlen == 32), therefore do
914 not treat the scan as
915 filtered. */
916 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
917 ssid_filter = false;
5e6e3a92
BZ		 918 }
919
920 /*
921 * The default number of channels sent in the command is low to
922 * ensure the response buffer from the firmware does not
923 * truncate scan results. That is not an issue with an SSID
924 * or BSSID filter applied to the scan results in the firmware.
925 */
cff23cec 926 if ((i && ssid_filter) ||
84f6a95a 927 !is_zero_ether_addr(scan_cfg_out->specific_bssid))
5e6e3a92 928 *filtered_scan = true;
8eda10ea
AP		 929
930 if (user_scan_in->scan_chan_gap) {
931 dev_dbg(adapter->dev, "info: scan: channel gap = %d\n",
932 user_scan_in->scan_chan_gap);
933 *max_chan_per_scan =
934 MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
935
936 chan_gap_tlv = (void *)tlv_pos;
937 chan_gap_tlv->header.type =
938 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP);
939 chan_gap_tlv->header.len =
940 cpu_to_le16(sizeof(chan_gap_tlv->chan_gap));
941 chan_gap_tlv->chan_gap =
942 cpu_to_le16((user_scan_in->scan_chan_gap));
943 tlv_pos +=
944 sizeof(struct mwifiex_ie_types_scan_chan_gap);
945 }
5e6e3a92
BZ		 946 } else {
947 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
948 num_probes = adapter->scan_probes;
949 }
950
951 /*
952 * If a specific BSSID or SSID is used, the number of channels in the
953 * scan command will be increased to the absolute maximum.
954 */
955 if (*filtered_scan)
956 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
957 else
658f37b7 958 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
5e6e3a92
BZ		 959
960 /* If the input config or adapter has the number of Probes set,
961 add tlv */
962 if (num_probes) {
963
964 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
cff23cec 965 num_probes);
5e6e3a92
BZ		 966
967 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
968 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
969 num_probes_tlv->header.len =
970 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
971 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
972
973 tlv_pos += sizeof(num_probes_tlv->header) +
974 le16_to_cpu(num_probes_tlv->header.len);
975
976 }
977
cff23cec
YAP		 978 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
979 (priv->adapter->config_bands & BAND_GN ||
980 priv->adapter->config_bands & BAND_AN)) {
5e6e3a92
BZ		 981 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
982 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
983 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
984 ht_cap->header.len =
985 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
a46b7b5c
AK		 986 radio_type =
987 mwifiex_band_to_radio_type(priv->adapter->config_bands);
341b8800 988 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
5e6e3a92
BZ		 989 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
990 }
991
992 /* Append vendor specific IE TLV */
993 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
994
995 /*
996 * Set the output for the channel TLV to the address in the tlv buffer
997 * past any TLVs that were added in this function (SSID, num_probes).
998 * Channel TLVs will be added past this for each scan command,
999 * preserving the TLVs that were previously added.
1000 */
1001 *chan_list_out =
1002 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
1003
1004 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
1005
1006 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
1007
1008 for (chan_idx = 0;
cff23cec
YAP		 1009 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
1010 user_scan_in->chan_list[chan_idx].chan_number;
5e6e3a92
BZ		 1011 chan_idx++) {
1012
1013 channel = user_scan_in->chan_list[chan_idx].chan_number;
1014 (scan_chan_list + chan_idx)->chan_number = channel;
1015
1016 radio_type =
1017 user_scan_in->chan_list[chan_idx].radio_type;
1018 (scan_chan_list + chan_idx)->radio_type = radio_type;
1019
1020 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
1021
1022 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1023 (scan_chan_list +
1024 chan_idx)->chan_scan_mode_bitmap
1025 |= MWIFIEX_PASSIVE_SCAN;
1026 else
1027 (scan_chan_list +
1028 chan_idx)->chan_scan_mode_bitmap
1029 &= ~MWIFIEX_PASSIVE_SCAN;
1030
f3e1af3e
AK		 1031 if (*filtered_scan)
1032 (scan_chan_list +
1033 chan_idx)->chan_scan_mode_bitmap
1034 |= MWIFIEX_DISABLE_CHAN_FILT;
1035
5e6e3a92
BZ		 1036 if (user_scan_in->chan_list[chan_idx].scan_time) {
1037 scan_dur = (u16) user_scan_in->
1038 chan_list[chan_idx].scan_time;
1039 } else {
1040 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1041 scan_dur = adapter->passive_scan_time;
1042 else if (*filtered_scan)
1043 scan_dur = adapter->specific_scan_time;
1044 else
1045 scan_dur = adapter->active_scan_time;
1046 }
1047
1048 (scan_chan_list + chan_idx)->min_scan_time =
1049 cpu_to_le16(scan_dur);
1050 (scan_chan_list + chan_idx)->max_scan_time =
1051 cpu_to_le16(scan_dur);
1052 }
1053
1054 /* Check if we are only scanning the current channel */
cff23cec
YAP		 1055 if ((chan_idx == 1) &&
1056 (user_scan_in->chan_list[0].chan_number ==
1057 priv->curr_bss_params.bss_descriptor.channel)) {
5e6e3a92
BZ		 1058 *scan_current_only = true;
1059 dev_dbg(adapter->dev,
1060 "info: Scan: Scanning current channel only\n");
1061 }
658f37b7 1062 chan_num = chan_idx;
5e6e3a92
BZ		 1063 } else {
1064 dev_dbg(adapter->dev,
cff23cec 1065 "info: Scan: Creating full region channel list\n");
658f37b7
AK		 1066 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
1067 scan_chan_list,
1068 *filtered_scan);
1069 }
1070
5e6e3a92
BZ		 1071}
1072
1073/*
1074 * This function inspects the scan response buffer for pointers to
1075 * expected TLVs.
1076 *
1077 * TLVs can be included at the end of the scan response BSS information.
1078 *
1079 * Data in the buffer is parsed pointers to TLVs that can potentially
1080 * be passed back in the response.
1081 */
1082static void
1083mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1084 struct mwifiex_ie_types_data *tlv,
1085 u32 tlv_buf_size, u32 req_tlv_type,
1086 struct mwifiex_ie_types_data **tlv_data)
1087{
1088 struct mwifiex_ie_types_data *current_tlv;
1089 u32 tlv_buf_left;
1090 u32 tlv_type;
1091 u32 tlv_len;
1092
1093 current_tlv = tlv;
1094 tlv_buf_left = tlv_buf_size;
1095 *tlv_data = NULL;
1096
1097 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
cff23cec 1098 tlv_buf_size);
5e6e3a92
BZ		 1099
1100 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1101
1102 tlv_type = le16_to_cpu(current_tlv->header.type);
1103 tlv_len = le16_to_cpu(current_tlv->header.len);
1104
1105 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1106 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1107 break;
1108 }
1109
1110 if (req_tlv_type == tlv_type) {
1111 switch (tlv_type) {
1112 case TLV_TYPE_TSFTIMESTAMP:
1113 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1114 "timestamp TLV, len = %d\n", tlv_len);
2c208890 1115 *tlv_data = current_tlv;
5e6e3a92
BZ		 1116 break;
1117 case TLV_TYPE_CHANNELBANDLIST:
1118 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1119 " band list TLV, len = %d\n", tlv_len);
2c208890 1120 *tlv_data = current_tlv;
5e6e3a92
BZ		 1121 break;
1122 default:
1123 dev_err(adapter->dev,
1124 "SCAN_RESP: unhandled TLV = %d\n",
1125 tlv_type);
1126 /* Give up, this seems corrupted */
1127 return;
1128 }
1129 }
1130
1131 if (*tlv_data)
1132 break;
1133
1134
1135 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1136 current_tlv =
1137 (struct mwifiex_ie_types_data *) (current_tlv->data +
1138 tlv_len);
1139
1140 } /* while */
1141}
1142
1143/*
7c6fa2a8
AK		 1144 * This function parses provided beacon buffer and updates
1145 * respective fields in bss descriptor structure.
5e6e3a92 1146 */
9558a407
AK		 1147int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1148 struct mwifiex_bssdescriptor *bss_entry)
5e6e3a92
BZ		 1149{
1150 int ret = 0;
1151 u8 element_id;
1152 struct ieee_types_fh_param_set *fh_param_set;
1153 struct ieee_types_ds_param_set *ds_param_set;
1154 struct ieee_types_cf_param_set *cf_param_set;
1155 struct ieee_types_ibss_param_set *ibss_param_set;
5e6e3a92
BZ		 1156 u8 *current_ptr;
1157 u8 *rate;
1158 u8 element_len;
1159 u16 total_ie_len;
1160 u8 bytes_to_copy;
1161 u8 rate_size;
5e6e3a92 1162 u8 found_data_rate_ie;
7c6fa2a8 1163 u32 bytes_left;
5e6e3a92
BZ		 1164 struct ieee_types_vendor_specific *vendor_ie;
1165 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1166 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1167
1168 found_data_rate_ie = false;
1169 rate_size = 0;
9558a407
AK		 1170 current_ptr = bss_entry->beacon_buf;
1171 bytes_left = bss_entry->beacon_buf_size;
5e6e3a92
BZ		 1172
1173 /* Process variable IE */
7c6fa2a8 1174 while (bytes_left >= 2) {
5e6e3a92
BZ		 1175 element_id = *current_ptr;
1176 element_len = *(current_ptr + 1);
1177 total_ie_len = element_len + sizeof(struct ieee_types_header);
1178
7c6fa2a8 1179 if (bytes_left < total_ie_len) {
5e6e3a92
BZ		 1180 dev_err(adapter->dev, "err: InterpretIE: in processing"
1181 " IE, bytes left < IE length\n");
7c6fa2a8 1182 return -1;
5e6e3a92
BZ		 1183 }
1184 switch (element_id) {
1185 case WLAN_EID_SSID:
1186 bss_entry->ssid.ssid_len = element_len;
1187 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1188 element_len);
cff23cec
YAP		 1189 dev_dbg(adapter->dev,
1190 "info: InterpretIE: ssid: %-32s\n",
1191 bss_entry->ssid.ssid);
5e6e3a92
BZ		 1192 break;
1193
1194 case WLAN_EID_SUPP_RATES:
1195 memcpy(bss_entry->data_rates, current_ptr + 2,
1196 element_len);
1197 memcpy(bss_entry->supported_rates, current_ptr + 2,
1198 element_len);
1199 rate_size = element_len;
1200 found_data_rate_ie = true;
1201 break;
1202
1203 case WLAN_EID_FH_PARAMS:
1204 fh_param_set =
1205 (struct ieee_types_fh_param_set *) current_ptr;
1206 memcpy(&bss_entry->phy_param_set.fh_param_set,
1207 fh_param_set,
1208 sizeof(struct ieee_types_fh_param_set));
1209 break;
1210
1211 case WLAN_EID_DS_PARAMS:
1212 ds_param_set =
1213 (struct ieee_types_ds_param_set *) current_ptr;
1214
1215 bss_entry->channel = ds_param_set->current_chan;
1216
1217 memcpy(&bss_entry->phy_param_set.ds_param_set,
1218 ds_param_set,
1219 sizeof(struct ieee_types_ds_param_set));
1220 break;
1221
1222 case WLAN_EID_CF_PARAMS:
1223 cf_param_set =
1224 (struct ieee_types_cf_param_set *) current_ptr;
1225 memcpy(&bss_entry->ss_param_set.cf_param_set,
1226 cf_param_set,
1227 sizeof(struct ieee_types_cf_param_set));
1228 break;
1229
1230 case WLAN_EID_IBSS_PARAMS:
1231 ibss_param_set =
1232 (struct ieee_types_ibss_param_set *)
1233 current_ptr;
1234 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1235 ibss_param_set,
1236 sizeof(struct ieee_types_ibss_param_set));
1237 break;
1238
1239 case WLAN_EID_ERP_INFO:
1240 bss_entry->erp_flags = *(current_ptr + 2);
1241 break;
1242
2a7305c8
AK		 1243 case WLAN_EID_PWR_CONSTRAINT:
1244 bss_entry->local_constraint = *(current_ptr + 2);
1245 bss_entry->sensed_11h = true;
1246 break;
1247
1248 case WLAN_EID_CHANNEL_SWITCH:
1249 bss_entry->chan_sw_ie_present = true;
1250 case WLAN_EID_PWR_CAPABILITY:
1251 case WLAN_EID_TPC_REPORT:
1252 case WLAN_EID_QUIET:
1253 bss_entry->sensed_11h = true;
1254 break;
1255
5e6e3a92
BZ		 1256 case WLAN_EID_EXT_SUPP_RATES:
1257 /*
1258 * Only process extended supported rate
1259 * if data rate is already found.
1260 * Data rate IE should come before
1261 * extended supported rate IE
1262 */
1263 if (found_data_rate_ie) {
1264 if ((element_len + rate_size) >
1265 MWIFIEX_SUPPORTED_RATES)
1266 bytes_to_copy =
1267 (MWIFIEX_SUPPORTED_RATES -
1268 rate_size);
1269 else
1270 bytes_to_copy = element_len;
1271
1272 rate = (u8 *) bss_entry->data_rates;
1273 rate += rate_size;
1274 memcpy(rate, current_ptr + 2, bytes_to_copy);
1275
1276 rate = (u8 *) bss_entry->supported_rates;
1277 rate += rate_size;
1278 memcpy(rate, current_ptr + 2, bytes_to_copy);
1279 }
1280 break;
1281
1282 case WLAN_EID_VENDOR_SPECIFIC:
1283 vendor_ie = (struct ieee_types_vendor_specific *)
1284 current_ptr;
1285
1286 if (!memcmp
1287 (vendor_ie->vend_hdr.oui, wpa_oui,
1288 sizeof(wpa_oui))) {
1289 bss_entry->bcn_wpa_ie =
1290 (struct ieee_types_vendor_specific *)
1291 current_ptr;
cff23cec
YAP		 1292 bss_entry->wpa_offset = (u16)
1293 (current_ptr - bss_entry->beacon_buf);
5e6e3a92
BZ		 1294 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1295 sizeof(wmm_oui))) {
1296 if (total_ie_len ==
cff23cec
YAP		 1297 sizeof(struct ieee_types_wmm_parameter) ||
1298 total_ie_len ==
5e6e3a92
BZ		 1299 sizeof(struct ieee_types_wmm_info))
1300 /*
1301 * Only accept and copy the WMM IE if
1302 * it matches the size expected for the
1303 * WMM Info IE or the WMM Parameter IE.
1304 */
1305 memcpy((u8 *) &bss_entry->wmm_ie,
1306 current_ptr, total_ie_len);
1307 }
1308 break;
1309 case WLAN_EID_RSN:
1310 bss_entry->bcn_rsn_ie =
1311 (struct ieee_types_generic *) current_ptr;
1312 bss_entry->rsn_offset = (u16) (current_ptr -
1313 bss_entry->beacon_buf);
1314 break;
1315 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1316 bss_entry->bcn_wapi_ie =
1317 (struct ieee_types_generic *) current_ptr;
1318 bss_entry->wapi_offset = (u16) (current_ptr -
1319 bss_entry->beacon_buf);
1320 break;
1321 case WLAN_EID_HT_CAPABILITY:
1322 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1323 (current_ptr +
1324 sizeof(struct ieee_types_header));
1325 bss_entry->ht_cap_offset = (u16) (current_ptr +
1326 sizeof(struct ieee_types_header) -
1327 bss_entry->beacon_buf);
1328 break;
074d46d1
JB		 1329 case WLAN_EID_HT_OPERATION:
1330 bss_entry->bcn_ht_oper =
1331 (struct ieee80211_ht_operation *)(current_ptr +
5e6e3a92
BZ		 1332 sizeof(struct ieee_types_header));
1333 bss_entry->ht_info_offset = (u16) (current_ptr +
1334 sizeof(struct ieee_types_header) -
1335 bss_entry->beacon_buf);
1336 break;
a5f39056
YAP		 1337 case WLAN_EID_VHT_CAPABILITY:
1338 bss_entry->disable_11ac = false;
1339 bss_entry->bcn_vht_cap =
1340 (void *)(current_ptr +
1341 sizeof(struct ieee_types_header));
1342 bss_entry->vht_cap_offset =
1343 (u16)((u8 *)bss_entry->bcn_vht_cap -
1344 bss_entry->beacon_buf);
1345 break;
1346 case WLAN_EID_VHT_OPERATION:
1347 bss_entry->bcn_vht_oper =
1348 (void *)(current_ptr +
1349 sizeof(struct ieee_types_header));
1350 bss_entry->vht_info_offset =
1351 (u16)((u8 *)bss_entry->bcn_vht_oper -
1352 bss_entry->beacon_buf);
1353 break;
5e6e3a92 1354 case WLAN_EID_BSS_COEX_2040:
cf831ffe
AK		 1355 bss_entry->bcn_bss_co_2040 = current_ptr;
1356 bss_entry->bss_co_2040_offset =
1357 (u16) (current_ptr - bss_entry->beacon_buf);
5e6e3a92
BZ		 1358 break;
1359 case WLAN_EID_EXT_CAPABILITY:
cf831ffe
AK		 1360 bss_entry->bcn_ext_cap = current_ptr;
1361 bss_entry->ext_cap_offset =
1362 (u16) (current_ptr - bss_entry->beacon_buf);
5e6e3a92 1363 break;
a5f39056 1364 case WLAN_EID_OPMODE_NOTIF:
cf831ffe 1365 bss_entry->oper_mode = (void *)current_ptr;
a5f39056
YAP		 1366 bss_entry->oper_mode_offset =
1367 (u16)((u8 *)bss_entry->oper_mode -
1368 bss_entry->beacon_buf);
1369 break;
5e6e3a92
BZ		 1370 default:
1371 break;
1372 }
1373
1374 current_ptr += element_len + 2;
1375
1376 /* Need to account for IE ID and IE Len */
7c6fa2a8 1377 bytes_left -= (element_len + 2);
5e6e3a92 1378
7c6fa2a8 1379 } /* while (bytes_left > 2) */
5e6e3a92
BZ		 1380 return ret;
1381}
1382
5e6e3a92
BZ		 1383/*
1384 * This function converts radio type scan parameter to a band configuration
1385 * to be used in join command.
1386 */
1387static u8
1388mwifiex_radio_type_to_band(u8 radio_type)
1389{
5e6e3a92
BZ		 1390 switch (radio_type) {
1391 case HostCmd_SCAN_RADIO_TYPE_A:
636c4598 1392 return BAND_A;
5e6e3a92
BZ		 1393 case HostCmd_SCAN_RADIO_TYPE_BG:
1394 default:
636c4598 1395 return BAND_G;
5e6e3a92 1396 }
5e6e3a92
BZ		 1397}
1398
5e6e3a92
BZ		 1399/*
1400 * This is an internal function used to start a scan based on an input
1401 * configuration.
1402 *
1403 * This uses the input user scan configuration information when provided in
1404 * order to send the appropriate scan commands to firmware to populate or
1405 * update the internal driver scan table.
1406 */
1a1fb970
AK		 1407int mwifiex_scan_networks(struct mwifiex_private *priv,
1408 const struct mwifiex_user_scan_cfg *user_scan_in)
5e6e3a92 1409{
c2476335 1410 int ret;
5e6e3a92 1411 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8
YAP		 1412 struct cmd_ctrl_node *cmd_node;
1413 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
5e6e3a92 1414 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
5e6e3a92 1415 struct mwifiex_chan_scan_param_set *scan_chan_list;
5e6e3a92
BZ		 1416 u8 filtered_scan;
1417 u8 scan_current_chan_only;
1418 u8 max_chan_per_scan;
1419 unsigned long flags;
1420
600f5d90 1421 if (adapter->scan_processing) {
c2476335
BZ		 1422 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1423 return -EBUSY;
5e6e3a92
BZ		 1424 }
1425
600f5d90 1426 if (priv->scan_block) {
c2476335 1427 dev_err(adapter->dev,
5e6e3a92 1428 "cmd: Scan is blocked during association...\n");
c2476335 1429 return -EBUSY;
5e6e3a92
BZ		 1430 }
1431
e00483f7
AK		 1432 if (adapter->surprise_removed || adapter->is_cmd_timedout) {
1433 dev_err(adapter->dev,
1434 "Ignore scan. Card removed or firmware in bad state\n");
1435 return -EFAULT;
1436 }
1437
c2476335
BZ		 1438 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1439 adapter->scan_processing = true;
1440 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1441
5e6e3a92 1442 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
0d2e7a5c 1443 GFP_KERNEL);
5e6e3a92 1444 if (!scan_cfg_out) {
061f2e69
AK		 1445 ret = -ENOMEM;
1446 goto done;
5e6e3a92
BZ		 1447 }
1448
0d2e7a5c
JP		 1449 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX,
1450 sizeof(struct mwifiex_chan_scan_param_set),
1451 GFP_KERNEL);
5e6e3a92 1452 if (!scan_chan_list) {
5e6e3a92 1453 kfree(scan_cfg_out);
061f2e69
AK		 1454 ret = -ENOMEM;
1455 goto done;
5e6e3a92
BZ		 1456 }
1457
cff23cec
YAP		 1458 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1459 &chan_list_out, scan_chan_list, &max_chan_per_scan,
1460 &filtered_scan, &scan_current_chan_only);
5e6e3a92 1461
600f5d90
AK		 1462 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1463 &scan_cfg_out->config, chan_list_out,
1464 scan_chan_list);
5e6e3a92
BZ		 1465
1466 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1467 if (!ret) {
1468 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1469 if (!list_empty(&adapter->scan_pending_q)) {
1470 cmd_node = list_first_entry(&adapter->scan_pending_q,
cff23cec 1471 struct cmd_ctrl_node, list);
5e6e3a92
BZ		 1472 list_del(&cmd_node->list);
1473 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
cff23cec 1474 flags);
5e6e3a92
BZ		 1475 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1476 true);
1a1fb970 1477 queue_work(adapter->workqueue, &adapter->main_work);
00d7ea11
AK		 1478
1479 /* Perform internal scan synchronously */
21de979e
BZ		 1480 if (!priv->scan_request) {
1481 dev_dbg(adapter->dev, "wait internal scan\n");
00d7ea11 1482 mwifiex_wait_queue_complete(adapter, cmd_node);
21de979e 1483 }
5e6e3a92
BZ		 1484 } else {
1485 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1486 flags);
1487 }
5e6e3a92
BZ		 1488 }
1489
1490 kfree(scan_cfg_out);
1491 kfree(scan_chan_list);
061f2e69
AK		 1492done:
1493 if (ret) {
1494 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1495 adapter->scan_processing = false;
1496 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1497 }
5e6e3a92
BZ		 1498 return ret;
1499}
1500
1501/*
1502 * This function prepares a scan command to be sent to the firmware.
1503 *
1504 * This uses the scan command configuration sent to the command processing
1505 * module in command preparation stage to configure a scan command structure
1506 * to send to firmware.
1507 *
1508 * The fixed fields specifying the BSS type and BSSID filters as well as a
1509 * variable number/length of TLVs are sent in the command to firmware.
1510 *
1511 * Preparation also includes -
1512 * - Setting command ID, and proper size
1513 * - Ensuring correct endian-ness
1514 */
a5ffddb7
AK		 1515int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1516 struct mwifiex_scan_cmd_config *scan_cfg)
5e6e3a92
BZ		 1517{
1518 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
5e6e3a92
BZ		 1519
1520 /* Set fixed field variables in scan command */
1521 scan_cmd->bss_mode = scan_cfg->bss_mode;
1522 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1523 sizeof(scan_cmd->bssid));
1524 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1525
1526 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1527
1528 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1529 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1530 + sizeof(scan_cmd->bssid)
1531 + scan_cfg->tlv_buf_len + S_DS_GEN));
1532
1533 return 0;
1534}
1535
7c6fa2a8
AK		 1536/*
1537 * This function checks compatibility of requested network with current
1538 * driver settings.
1539 */
1540int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1541 struct mwifiex_bssdescriptor *bss_desc)
1542{
1543 int ret = -1;
1544
1545 if (!bss_desc)
1546 return -1;
1547
6685d109
YAP		 1548 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1549 (u16) bss_desc->channel, 0))) {
7c6fa2a8
AK		 1550 switch (priv->bss_mode) {
1551 case NL80211_IFTYPE_STATION:
1552 case NL80211_IFTYPE_ADHOC:
1553 ret = mwifiex_is_network_compatible(priv, bss_desc,
1554 priv->bss_mode);
1555 if (ret)
06975884
AK		 1556 dev_err(priv->adapter->dev,
1557 "Incompatible network settings\n");
2f9279b5 1558 break;
7c6fa2a8 1559 default:
2f9279b5 1560 ret = 0;
7c6fa2a8
AK		 1561 }
1562 }
1563
1564 return ret;
1565}
1566
9558a407
AK		 1567static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1568 struct cfg80211_bss *bss)
7c6fa2a8 1569{
db652e4b 1570 struct mwifiex_bssdescriptor *bss_desc;
7c6fa2a8
AK		 1571 int ret;
1572 unsigned long flags;
7c6fa2a8
AK		 1573
1574 /* Allocate and fill new bss descriptor */
0d2e7a5c
JP		 1575 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL);
1576 if (!bss_desc)
7c6fa2a8 1577 return -ENOMEM;
5982b47a 1578
9558a407 1579 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
7c6fa2a8
AK		 1580 if (ret)
1581 goto done;
1582
1583 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1584 if (ret)
1585 goto done;
1586
7c6fa2a8 1587 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
7c6fa2a8
AK		 1588 /* Make a copy of current BSSID descriptor */
1589 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
cff23cec 1590 sizeof(priv->curr_bss_params.bss_descriptor));
d837a2ae
BZ		 1591
1592 /* The contents of beacon_ie will be copied to its own buffer
1593 * in mwifiex_save_curr_bcn()
1594 */
7c6fa2a8
AK		 1595 mwifiex_save_curr_bcn(priv);
1596 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1597
1598done:
d837a2ae
BZ		 1599 /* beacon_ie buffer was allocated in function
1600 * mwifiex_fill_new_bss_desc(). Free it now.
1601 */
1602 kfree(bss_desc->beacon_buf);
7c6fa2a8 1603 kfree(bss_desc);
7c6fa2a8
AK		 1604 return 0;
1605}
1606
3b4d5c64
AK		 1607static int
1608mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
1609 u32 *bytes_left, u64 fw_tsf, u8 *radio_type,
21f58d20 1610 bool ext_scan, s32 rssi_val)
3b4d5c64
AK		 1611{
1612 struct mwifiex_adapter *adapter = priv->adapter;
1613 struct mwifiex_chan_freq_power *cfp;
1614 struct cfg80211_bss *bss;
1615 u8 bssid[ETH_ALEN];
1616 s32 rssi;
1617 const u8 *ie_buf;
1618 size_t ie_len;
1619 u16 channel = 0;
1620 u16 beacon_size = 0;
1621 u32 curr_bcn_bytes;
1622 u32 freq;
1623 u16 beacon_period;
1624 u16 cap_info_bitmap;
1625 u8 *current_ptr;
1626 u64 timestamp;
1627 struct mwifiex_fixed_bcn_param *bcn_param;
1628 struct mwifiex_bss_priv *bss_priv;
1629
1630 if (*bytes_left >= sizeof(beacon_size)) {
1631 /* Extract & convert beacon size from command buffer */
798ea8ee 1632 beacon_size = le16_to_cpu(*(__le16 *)(*bss_info));
3b4d5c64
AK		 1633 *bytes_left -= sizeof(beacon_size);
1634 *bss_info += sizeof(beacon_size);
1635 }
1636
1637 if (!beacon_size || beacon_size > *bytes_left) {
1638 *bss_info += *bytes_left;
1639 *bytes_left = 0;
1640 return -EFAULT;
1641 }
1642
1643 /* Initialize the current working beacon pointer for this BSS
1644 * iteration
1645 */
1646 current_ptr = *bss_info;
1647
1648 /* Advance the return beacon pointer past the current beacon */
1649 *bss_info += beacon_size;
1650 *bytes_left -= beacon_size;
1651
1652 curr_bcn_bytes = beacon_size;
1653
1654 /* First 5 fields are bssid, RSSI(for legacy scan only),
1655 * time stamp, beacon interval, and capability information
1656 */
1657 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
1658 sizeof(struct mwifiex_fixed_bcn_param)) {
1659 dev_err(adapter->dev, "InterpretIE: not enough bytes left\n");
1660 return -EFAULT;
1661 }
1662
1663 memcpy(bssid, current_ptr, ETH_ALEN);
1664 current_ptr += ETH_ALEN;
1665 curr_bcn_bytes -= ETH_ALEN;
1666
1667 if (!ext_scan) {
45d18c56 1668 rssi = (s32) *current_ptr;
3b4d5c64
AK		 1669 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1670 current_ptr += sizeof(u8);
1671 curr_bcn_bytes -= sizeof(u8);
1672 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
21f58d20
AK		 1673 } else {
1674 rssi = rssi_val;
3b4d5c64
AK		 1675 }
1676
1677 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr;
1678 current_ptr += sizeof(*bcn_param);
1679 curr_bcn_bytes -= sizeof(*bcn_param);
1680
1681 timestamp = le64_to_cpu(bcn_param->timestamp);
1682 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1683
1684 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1685 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1686 cap_info_bitmap);
1687
1688 /* Rest of the current buffer are IE's */
1689 ie_buf = current_ptr;
1690 ie_len = curr_bcn_bytes;
1691 dev_dbg(adapter->dev, "info: InterpretIE: IELength for this AP = %d\n",
1692 curr_bcn_bytes);
1693
1694 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1695 u8 element_id, element_len;
1696
1697 element_id = *current_ptr;
1698 element_len = *(current_ptr + 1);
1699 if (curr_bcn_bytes < element_len +
1700 sizeof(struct ieee_types_header)) {
1701 dev_err(adapter->dev,
1702 "%s: bytes left < IE length\n", __func__);
1703 return -EFAULT;
1704 }
1705 if (element_id == WLAN_EID_DS_PARAMS) {
1706 channel = *(current_ptr +
1707 sizeof(struct ieee_types_header));
1708 break;
1709 }
1710
1711 current_ptr += element_len + sizeof(struct ieee_types_header);
1712 curr_bcn_bytes -= element_len +
1713 sizeof(struct ieee_types_header);
1714 }
1715
1716 if (channel) {
1717 struct ieee80211_channel *chan;
1718 u8 band;
1719
1720 /* Skip entry if on csa closed channel */
1721 if (channel == priv->csa_chan) {
1722 dev_dbg(adapter->dev,
1723 "Dropping entry on csa closed channel\n");
1724 return 0;
1725 }
1726
1727 band = BAND_G;
1728 if (radio_type)
1729 band = mwifiex_radio_type_to_band(*radio_type &
1730 (BIT(0) | BIT(1)));
1731
1732 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1733
1734 freq = cfp ? cfp->freq : 0;
1735
4facc34a 1736 chan = ieee80211_get_channel(priv->wdev.wiphy, freq);
3b4d5c64
AK		 1737
1738 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
4facc34a 1739 bss = cfg80211_inform_bss(priv->wdev.wiphy,
5bc8c1f2
JB		 1740 chan, CFG80211_BSS_FTYPE_UNKNOWN,
1741 bssid, timestamp,
3b4d5c64
AK		 1742 cap_info_bitmap, beacon_period,
1743 ie_buf, ie_len, rssi, GFP_KERNEL);
1744 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1745 bss_priv->band = band;
1746 bss_priv->fw_tsf = fw_tsf;
1747 if (priv->media_connected &&
1748 !memcmp(bssid, priv->curr_bss_params.bss_descriptor
1749 .mac_address, ETH_ALEN))
1750 mwifiex_update_curr_bss_params(priv, bss);
4facc34a 1751 cfg80211_put_bss(priv->wdev.wiphy, bss);
3b4d5c64
AK		 1752 }
1753 } else {
1754 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1755 }
1756
1757 return 0;
1758}
1759
21445049
AP		 1760static void mwifiex_complete_scan(struct mwifiex_private *priv)
1761{
1762 struct mwifiex_adapter *adapter = priv->adapter;
1763
bf354433 1764 adapter->survey_idx = 0;
21445049
AP		 1765 if (adapter->curr_cmd->wait_q_enabled) {
1766 adapter->cmd_wait_q.status = 0;
1767 if (!priv->scan_request) {
1768 dev_dbg(adapter->dev, "complete internal scan\n");
1769 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1770 }
1771 }
1772}
1773
d44b5c2f
AK		 1774static void mwifiex_check_next_scan_command(struct mwifiex_private *priv)
1775{
1776 struct mwifiex_adapter *adapter = priv->adapter;
d8d91253 1777 struct cmd_ctrl_node *cmd_node, *tmp_node;
d44b5c2f
AK		 1778 unsigned long flags;
1779
1780 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1781 if (list_empty(&adapter->scan_pending_q)) {
1782 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1783 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1784 adapter->scan_processing = false;
1785 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1786
21445049
AP		 1787 if (!adapter->ext_scan)
1788 mwifiex_complete_scan(priv);
1789
d44b5c2f
AK		 1790 if (priv->scan_request) {
1791 dev_dbg(adapter->dev, "info: notifying scan done\n");
1792 cfg80211_scan_done(priv->scan_request, 0);
1793 priv->scan_request = NULL;
1794 } else {
1795 priv->scan_aborting = false;
1796 dev_dbg(adapter->dev, "info: scan already aborted\n");
1797 }
d8d91253
AK		 1798 } else if ((priv->scan_aborting && !priv->scan_request) ||
1799 priv->scan_block) {
1800 list_for_each_entry_safe(cmd_node, tmp_node,
1801 &adapter->scan_pending_q, list) {
d44b5c2f 1802 list_del(&cmd_node->list);
d8d91253
AK		 1803 mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
1804 }
1805 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1806
1807 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1808 adapter->scan_processing = false;
1809 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1810
1811 if (priv->scan_request) {
1812 dev_dbg(adapter->dev, "info: aborting scan\n");
1813 cfg80211_scan_done(priv->scan_request, 1);
1814 priv->scan_request = NULL;
1815 } else {
1816 priv->scan_aborting = false;
1817 dev_dbg(adapter->dev, "info: scan already aborted\n");
d44b5c2f 1818 }
d8d91253
AK		 1819 } else {
1820 /* Get scan command from scan_pending_q and put to
1821 * cmd_pending_q
1822 */
1823 cmd_node = list_first_entry(&adapter->scan_pending_q,
1824 struct cmd_ctrl_node, list);
1825 list_del(&cmd_node->list);
1826 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1827 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
d44b5c2f
AK		 1828 }
1829
1830 return;
1831}
1832
5e6e3a92
BZ		 1833/*
1834 * This function handles the command response of scan.
1835 *
1836 * The response buffer for the scan command has the following
1837 * memory layout:
1838 *
1839 * .-------------------------------------------------------------.
1840 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1841 * .-------------------------------------------------------------.
1842 * | BufSize (t_u16) : sizeof the BSS Description data |
1843 * .-------------------------------------------------------------.
1844 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1845 * .-------------------------------------------------------------.
1846 * | BSSDescription data (variable, size given in BufSize) |
1847 * .-------------------------------------------------------------.
1848 * | TLV data (variable, size calculated using Header->Size, |
1849 * | BufSize and sizeof the fixed fields above) |
1850 * .-------------------------------------------------------------.
1851 */
1852int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
600f5d90 1853 struct host_cmd_ds_command *resp)
5e6e3a92
BZ		 1854{
1855 int ret = 0;
1856 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8 1857 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
5e6e3a92
BZ		 1858 struct mwifiex_ie_types_data *tlv_data;
1859 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1860 u8 *bss_info;
1861 u32 scan_resp_size;
1862 u32 bytes_left;
5e6e3a92
BZ		 1863 u32 idx;
1864 u32 tlv_buf_size;
5e6e3a92
BZ		 1865 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1866 struct chan_band_param_set *chan_band;
5e6e3a92 1867 u8 is_bgscan_resp;
3b4d5c64
AK		 1868 __le64 fw_tsf = 0;
1869 u8 *radio_type;
5e6e3a92
BZ		 1870
1871 is_bgscan_resp = (le16_to_cpu(resp->command)
cff23cec 1872 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
5e6e3a92
BZ		 1873 if (is_bgscan_resp)
1874 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1875 else
1876 scan_rsp = &resp->params.scan_resp;
1877
1878
67a50035 1879 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
5e6e3a92 1880 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
cff23cec 1881 scan_rsp->number_of_sets);
5e6e3a92 1882 ret = -1;
8a7d7cbf 1883 goto check_next_scan;
5e6e3a92
BZ		 1884 }
1885
b887664d
AK		 1886 /* Check csa channel expiry before parsing scan response */
1887 mwifiex_11h_get_csa_closed_channel(priv);
1888
5e6e3a92
BZ		 1889 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1890 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
cff23cec 1891 bytes_left);
5e6e3a92
BZ		 1892
1893 scan_resp_size = le16_to_cpu(resp->size);
1894
1895 dev_dbg(adapter->dev,
1896 "info: SCAN_RESP: returned %d APs before parsing\n",
cff23cec 1897 scan_rsp->number_of_sets);
5e6e3a92 1898
5e6e3a92
BZ		 1899 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1900
1901 /*
1902 * The size of the TLV buffer is equal to the entire command response
1903 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1904 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1905 * response header (S_DS_GEN)
1906 */
1907 tlv_buf_size = scan_resp_size - (bytes_left
1908 + sizeof(scan_rsp->bss_descript_size)
1909 + sizeof(scan_rsp->number_of_sets)
1910 + S_DS_GEN);
1911
1912 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1913 bss_desc_and_tlv_buffer +
1914 bytes_left);
1915
1916 /* Search the TLV buffer space in the scan response for any valid
1917 TLVs */
1918 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1919 TLV_TYPE_TSFTIMESTAMP,
1920 (struct mwifiex_ie_types_data **)
1921 &tsf_tlv);
1922
1923 /* Search the TLV buffer space in the scan response for any valid
1924 TLVs */
1925 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1926 TLV_TYPE_CHANNELBANDLIST,
1927 (struct mwifiex_ie_types_data **)
1928 &chan_band_tlv);
1929
5e6e3a92 1930 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
5e6e3a92
BZ		 1931 /*
1932 * If the TSF TLV was appended to the scan results, save this
b5abcf02
AK		 1933 * entry's TSF value in the fw_tsf field. It is the firmware's
1934 * TSF value at the time the beacon or probe response was
1935 * received.
5e6e3a92 1936 */
7c6fa2a8 1937 if (tsf_tlv)
b5abcf02
AK		 1938 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1939 sizeof(fw_tsf));
7c6fa2a8 1940
3b4d5c64
AK		 1941 if (chan_band_tlv) {
1942 chan_band = &chan_band_tlv->chan_band_param[idx];
1943 radio_type = &chan_band->radio_type;
7c6fa2a8 1944 } else {
3b4d5c64 1945 radio_type = NULL;
7c6fa2a8 1946 }
3b4d5c64
AK		 1947
1948 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
1949 &bytes_left,
1950 le64_to_cpu(fw_tsf),
21f58d20 1951 radio_type, false, 0);
3b4d5c64
AK		 1952 if (ret)
1953 goto check_next_scan;
7c6fa2a8 1954 }
5e6e3a92 1955
8a7d7cbf 1956check_next_scan:
d44b5c2f 1957 mwifiex_check_next_scan_command(priv);
5e6e3a92
BZ		 1958 return ret;
1959}
1960
21f58d20
AK		 1961/*
1962 * This function prepares an extended scan command to be sent to the firmware
1963 *
1964 * This uses the scan command configuration sent to the command processing
1965 * module in command preparation stage to configure a extended scan command
1966 * structure to send to firmware.
1967 */
1968int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv,
1969 struct host_cmd_ds_command *cmd,
1970 void *data_buf)
1971{
1972 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan;
1973 struct mwifiex_scan_cmd_config *scan_cfg = data_buf;
1974
1975 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1976
1977 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT);
1978
1979 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1980 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved)
1981 + scan_cfg->tlv_buf_len + S_DS_GEN));
1982
1983 return 0;
1984}
1985
bf354433
AP		 1986static void
1987mwifiex_update_chan_statistics(struct mwifiex_private *priv,
1988 struct mwifiex_ietypes_chanstats *tlv_stat)
1989{
1990 struct mwifiex_adapter *adapter = priv->adapter;
1991 u8 i, num_chan;
1992 struct mwifiex_fw_chan_stats *fw_chan_stats;
1993 struct mwifiex_chan_stats chan_stats;
1994
1995 fw_chan_stats = (void *)((u8 *)tlv_stat +
1996 sizeof(struct mwifiex_ie_types_header));
1997 num_chan = le16_to_cpu(tlv_stat->header.len) /
1998 sizeof(struct mwifiex_chan_stats);
1999
2000 for (i = 0 ; i < num_chan; i++) {
2001 chan_stats.chan_num = fw_chan_stats->chan_num;
2002 chan_stats.bandcfg = fw_chan_stats->bandcfg;
2003 chan_stats.flags = fw_chan_stats->flags;
2004 chan_stats.noise = fw_chan_stats->noise;
2005 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss);
2006 chan_stats.cca_scan_dur =
2007 le16_to_cpu(fw_chan_stats->cca_scan_dur);
2008 chan_stats.cca_busy_dur =
2009 le16_to_cpu(fw_chan_stats->cca_busy_dur);
2010 dev_dbg(adapter->dev,
2011 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n",
2012 chan_stats.chan_num,
2013 chan_stats.noise,
2014 chan_stats.total_bss,
2015 chan_stats.cca_scan_dur,
2016 chan_stats.cca_busy_dur);
2017 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats,
2018 sizeof(struct mwifiex_chan_stats));
2019 fw_chan_stats++;
2020 }
2021}
2022
21f58d20 2023/* This function handles the command response of extended scan */
bf354433
AP		 2024int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv,
2025 struct host_cmd_ds_command *resp)
21f58d20 2026{
3223db20 2027 struct mwifiex_adapter *adapter = priv->adapter;
bf354433
AP		 2028 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp;
2029 struct mwifiex_ie_types_header *tlv;
2030 struct mwifiex_ietypes_chanstats *tlv_stat;
2031 u16 buf_left, type, len;
2032
3223db20
AP		 2033 struct host_cmd_ds_command *cmd_ptr;
2034 struct cmd_ctrl_node *cmd_node;
2035 unsigned long cmd_flags, scan_flags;
2036 bool complete_scan = false;
2037
21f58d20 2038 dev_dbg(priv->adapter->dev, "info: EXT scan returns successfully\n");
21445049 2039
bf354433
AP		 2040 ext_scan_resp = &resp->params.ext_scan;
2041
2042 tlv = (void *)ext_scan_resp->tlv_buffer;
2043 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN
2044 - 1);
2045
2046 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) {
2047 type = le16_to_cpu(tlv->type);
2048 len = le16_to_cpu(tlv->len);
2049
2050 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) {
2051 dev_err(adapter->dev,
2052 "error processing scan response TLVs");
2053 break;
2054 }
2055
2056 switch (type) {
2057 case TLV_TYPE_CHANNEL_STATS:
2058 tlv_stat = (void *)tlv;
2059 mwifiex_update_chan_statistics(priv, tlv_stat);
2060 break;
2061 default:
2062 break;
2063 }
2064
2065 buf_left -= len + sizeof(struct mwifiex_ie_types_header);
2066 tlv = (void *)((u8 *)tlv + len +
2067 sizeof(struct mwifiex_ie_types_header));
2068 }
2069
3223db20
AP		 2070 spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_flags);
2071 spin_lock_irqsave(&adapter->scan_pending_q_lock, scan_flags);
2072 if (list_empty(&adapter->scan_pending_q)) {
2073 complete_scan = true;
2074 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) {
2075 cmd_ptr = (void *)cmd_node->cmd_skb->data;
2076 if (le16_to_cpu(cmd_ptr->command) ==
2077 HostCmd_CMD_802_11_SCAN_EXT) {
2078 dev_dbg(priv->adapter->dev,
2079 "Scan pending in command pending list");
2080 complete_scan = false;
2081 break;
2082 }
2083 }
2084 }
2085 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, scan_flags);
2086 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, cmd_flags);
2087
2088 if (complete_scan)
2089 mwifiex_complete_scan(priv);
21445049 2090
21f58d20
AK		 2091 return 0;
2092}
2093
2094/* This function This function handles the event extended scan report. It
2095 * parses extended scan results and informs to cfg80211 stack.
2096 */
2097int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv,
2098 void *buf)
2099{
2100 int ret = 0;
2101 struct mwifiex_adapter *adapter = priv->adapter;
2102 u8 *bss_info;
2103 u32 bytes_left, bytes_left_for_tlv, idx;
2104 u16 type, len;
2105 struct mwifiex_ie_types_data *tlv;
2106 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv;
2107 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv;
2108 u8 *radio_type;
2109 u64 fw_tsf = 0;
2110 s32 rssi = 0;
2111 struct mwifiex_event_scan_result *event_scan = buf;
2112 u8 num_of_set = event_scan->num_of_set;
2113 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result);
2114 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size);
2115
2116 if (num_of_set > MWIFIEX_MAX_AP) {
2117 dev_err(adapter->dev,
2118 "EXT_SCAN: Invalid number of AP returned (%d)!!\n",
2119 num_of_set);
2120 ret = -1;
2121 goto check_next_scan;
2122 }
2123
2124 bytes_left = scan_resp_size;
2125 dev_dbg(adapter->dev,
2126 "EXT_SCAN: size %d, returned %d APs...",
2127 scan_resp_size, num_of_set);
2128
2129 tlv = (struct mwifiex_ie_types_data *)scan_resp;
2130
2131 for (idx = 0; idx < num_of_set && bytes_left; idx++) {
2132 type = le16_to_cpu(tlv->header.type);
2133 len = le16_to_cpu(tlv->header.len);
2134 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) {
2135 dev_err(adapter->dev, "EXT_SCAN: Error bytes left < TLV length\n");
2136 break;
2137 }
2138 scan_rsp_tlv = NULL;
2139 scan_info_tlv = NULL;
2140 bytes_left_for_tlv = bytes_left;
2141
2142 /* BSS response TLV with beacon or probe response buffer
2143 * at the initial position of each descriptor
2144 */
2145 if (type != TLV_TYPE_BSS_SCAN_RSP)
2146 break;
2147
2148 bss_info = (u8 *)tlv;
2149 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv;
2150 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2151 bytes_left_for_tlv -=
2152 (len + sizeof(struct mwifiex_ie_types_header));
2153
2154 while (bytes_left_for_tlv >=
2155 sizeof(struct mwifiex_ie_types_header) &&
2156 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) {
2157 type = le16_to_cpu(tlv->header.type);
2158 len = le16_to_cpu(tlv->header.len);
2159 if (bytes_left_for_tlv <
2160 sizeof(struct mwifiex_ie_types_header) + len) {
2161 dev_err(adapter->dev,
2162 "EXT_SCAN: Error in processing TLV, bytes left < TLV length\n");
2163 scan_rsp_tlv = NULL;
2164 bytes_left_for_tlv = 0;
2165 continue;
2166 }
2167 switch (type) {
2168 case TLV_TYPE_BSS_SCAN_INFO:
2169 scan_info_tlv =
2170 (struct mwifiex_ie_types_bss_scan_info *)tlv;
2171 if (len !=
2172 sizeof(struct mwifiex_ie_types_bss_scan_info) -
2173 sizeof(struct mwifiex_ie_types_header)) {
2174 bytes_left_for_tlv = 0;
2175 continue;
2176 }
2177 break;
2178 default:
2179 break;
2180 }
2181 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2182 bytes_left -=
2183 (len + sizeof(struct mwifiex_ie_types_header));
2184 bytes_left_for_tlv -=
2185 (len + sizeof(struct mwifiex_ie_types_header));
2186 }
2187
2188 if (!scan_rsp_tlv)
2189 break;
2190
2191 /* Advance pointer to the beacon buffer length and
2192 * update the bytes count so that the function
2193 * wlan_interpret_bss_desc_with_ie() can handle the
2194 * scan buffer withut any change
2195 */
2196 bss_info += sizeof(u16);
2197 bytes_left -= sizeof(u16);
2198
2199 if (scan_info_tlv) {
2200 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi));
2201 rssi *= 100; /* Convert dBm to mBm */
2202 dev_dbg(adapter->dev,
2203 "info: InterpretIE: RSSI=%d\n", rssi);
2204 fw_tsf = le64_to_cpu(scan_info_tlv->tsf);
2205 radio_type = &scan_info_tlv->radio_type;
2206 } else {
2207 radio_type = NULL;
2208 }
2209 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
2210 &bytes_left, fw_tsf,
2211 radio_type, true, rssi);
2212 if (ret)
2213 goto check_next_scan;
2214 }
2215
2216check_next_scan:
2217 if (!event_scan->more_event)
2218 mwifiex_check_next_scan_command(priv);
2219
2220 return ret;
2221}
2222
5e6e3a92
BZ		 2223/*
2224 * This function prepares command for background scan query.
2225 *
2226 * Preparation includes -
2227 * - Setting command ID and proper size
2228 * - Setting background scan flush parameter
2229 * - Ensuring correct endian-ness
2230 */
572e8f3e 2231int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
5e6e3a92
BZ		 2232{
2233 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
2234 &cmd->params.bg_scan_query;
2235
2236 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
2237 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
2238 + S_DS_GEN);
2239
2240 bg_query->flush = 1;
2241
2242 return 0;
2243}
2244
5e6e3a92
BZ		 2245/*
2246 * This function inserts scan command node to the scan pending queue.
2247 */
2248void
2249mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
2250 struct cmd_ctrl_node *cmd_node)
2251{
2252 struct mwifiex_adapter *adapter = priv->adapter;
2253 unsigned long flags;
2254
600f5d90 2255 cmd_node->wait_q_enabled = true;
efaaa8b8 2256 cmd_node->condition = &adapter->scan_wait_q_woken;
5e6e3a92
BZ		 2257 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
2258 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
2259 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2260}
2261
5e6e3a92
BZ		 2262/*
2263 * This function sends a scan command for all available channels to the
2264 * firmware, filtered on a specific SSID.
2265 */
2266static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
b9be5f39 2267 struct cfg80211_ssid *req_ssid)
5e6e3a92
BZ		 2268{
2269 struct mwifiex_adapter *adapter = priv->adapter;
dcd5c79c 2270 int ret;
5e6e3a92
BZ		 2271 struct mwifiex_user_scan_cfg *scan_cfg;
2272
600f5d90 2273 if (adapter->scan_processing) {
dcd5c79c
BZ		 2274 dev_err(adapter->dev, "cmd: Scan already in process...\n");
2275 return -EBUSY;
5e6e3a92
BZ		 2276 }
2277
600f5d90 2278 if (priv->scan_block) {
dcd5c79c 2279 dev_err(adapter->dev,
5e6e3a92 2280 "cmd: Scan is blocked during association...\n");
dcd5c79c 2281 return -EBUSY;
5e6e3a92
BZ		 2282 }
2283
5e6e3a92 2284 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
0d2e7a5c 2285 if (!scan_cfg)
b53575ec 2286 return -ENOMEM;
5e6e3a92 2287
be0b281e
AK		 2288 scan_cfg->ssid_list = req_ssid;
2289 scan_cfg->num_ssids = 1;
5e6e3a92 2290
600f5d90 2291 ret = mwifiex_scan_networks(priv, scan_cfg);
5e6e3a92
BZ		 2292
2293 kfree(scan_cfg);
2294 return ret;
2295}
2296
2297/*
2298 * Sends IOCTL request to start a scan.
2299 *
2300 * This function allocates the IOCTL request buffer, fills it
2301 * with requisite parameters and calls the IOCTL handler.
2302 *
2303 * Scan command can be issued for both normal scan and specific SSID
2304 * scan, depending upon whether an SSID is provided or not.
2305 */
600f5d90 2306int mwifiex_request_scan(struct mwifiex_private *priv,
b9be5f39 2307 struct cfg80211_ssid *req_ssid)
5e6e3a92 2308{
270e58e8 2309 int ret;
5e6e3a92
BZ		 2310
2311 if (down_interruptible(&priv->async_sem)) {
2312 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
cff23cec 2313 __func__);
5e6e3a92
BZ		 2314 return -1;
2315 }
5e6e3a92 2316
efaaa8b8 2317 priv->adapter->scan_wait_q_woken = false;
5e6e3a92
BZ		 2318
2319 if (req_ssid && req_ssid->ssid_len != 0)
2320 /* Specific SSID scan */
600f5d90 2321 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
5e6e3a92
BZ		 2322 else
2323 /* Normal scan */
600f5d90
AK		 2324 ret = mwifiex_scan_networks(priv, NULL);
2325
b0e70c2f 2326 up(&priv->async_sem);
600f5d90 2327
5e6e3a92
BZ		 2328 return ret;
2329}
2330
2331/*
2332 * This function appends the vendor specific IE TLV to a buffer.
2333 */
2334int
2335mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
2336 u16 vsie_mask, u8 **buffer)
2337{
2338 int id, ret_len = 0;
2339 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
2340
2341 if (!buffer)
2342 return 0;
2343 if (!(*buffer))
2344 return 0;
2345
2346 /*
2347 * Traverse through the saved vendor specific IE array and append
2348 * the selected(scan/assoc/adhoc) IE as TLV to the command
2349 */
2350 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
2351 if (priv->vs_ie[id].mask & vsie_mask) {
2352 vs_param_set =
2353 (struct mwifiex_ie_types_vendor_param_set *)
2354 *buffer;
2355 vs_param_set->header.type =
2356 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
2357 vs_param_set->header.len =
2358 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
2359 & 0x00FF) + 2);
2360 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
2361 le16_to_cpu(vs_param_set->header.len));
2362 *buffer += le16_to_cpu(vs_param_set->header.len) +
2363 sizeof(struct mwifiex_ie_types_header);
2364 ret_len += le16_to_cpu(vs_param_set->header.len) +
2365 sizeof(struct mwifiex_ie_types_header);
2366 }
2367 }
2368 return ret_len;
2369}
2370
2371/*
2372 * This function saves a beacon buffer of the current BSS descriptor.
2373 *
2374 * The current beacon buffer is saved so that it can be restored in the
2375 * following cases that makes the beacon buffer not to contain the current
2376 * ssid's beacon buffer.
2377 * - The current ssid was not found somehow in the last scan.
2378 * - The current ssid was the last entry of the scan table and overloaded.
2379 */
2380void
2381mwifiex_save_curr_bcn(struct mwifiex_private *priv)
2382{
2383 struct mwifiex_bssdescriptor *curr_bss =
2384 &priv->curr_bss_params.bss_descriptor;
2385
030fe797
AK		 2386 if (!curr_bss->beacon_buf_size)
2387 return;
5e6e3a92 2388
030fe797
AK		 2389 /* allocate beacon buffer at 1st time; or if it's size has changed */
2390 if (!priv->curr_bcn_buf ||
cff23cec 2391 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
5e6e3a92 2392 priv->curr_bcn_size = curr_bss->beacon_buf_size;
5e6e3a92 2393
030fe797 2394 kfree(priv->curr_bcn_buf);
5982b47a 2395 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
cff23cec 2396 GFP_ATOMIC);
0d2e7a5c 2397 if (!priv->curr_bcn_buf)
030fe797 2398 return;
5e6e3a92 2399 }
030fe797
AK		 2400
2401 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
cff23cec 2402 curr_bss->beacon_buf_size);
030fe797
AK		 2403 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2404 priv->curr_bcn_size);
7c6fa2a8
AK		 2405
2406 curr_bss->beacon_buf = priv->curr_bcn_buf;
2407
2408 /* adjust the pointers in the current BSS descriptor */
2409 if (curr_bss->bcn_wpa_ie)
2410 curr_bss->bcn_wpa_ie =
2411 (struct ieee_types_vendor_specific *)
2412 (curr_bss->beacon_buf +
2413 curr_bss->wpa_offset);
2414
2415 if (curr_bss->bcn_rsn_ie)
2416 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2417 (curr_bss->beacon_buf +
2418 curr_bss->rsn_offset);
2419
2420 if (curr_bss->bcn_ht_cap)
2421 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2422 (curr_bss->beacon_buf +
2423 curr_bss->ht_cap_offset);
2424
074d46d1
JB		 2425 if (curr_bss->bcn_ht_oper)
2426 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
7c6fa2a8
AK		 2427 (curr_bss->beacon_buf +
2428 curr_bss->ht_info_offset);
2429
a5f39056 2430 if (curr_bss->bcn_vht_cap)
d5124648
AK		 2431 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf +
2432 curr_bss->vht_cap_offset);
a5f39056
YAP		 2433
2434 if (curr_bss->bcn_vht_oper)
d5124648
AK		 2435 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf +
2436 curr_bss->vht_info_offset);
a5f39056 2437
7c6fa2a8
AK		 2438 if (curr_bss->bcn_bss_co_2040)
2439 curr_bss->bcn_bss_co_2040 =
2c208890 2440 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
7c6fa2a8
AK		 2441
2442 if (curr_bss->bcn_ext_cap)
2c208890
JP		 2443 curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
2444 curr_bss->ext_cap_offset;
a5f39056
YAP		 2445
2446 if (curr_bss->oper_mode)
2447 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
2448 curr_bss->oper_mode_offset);
5e6e3a92
BZ		 2449}
2450
2451/*
2452 * This function frees the current BSS descriptor beacon buffer.
2453 */
2454void
2455mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2456{
2457 kfree(priv->curr_bcn_buf);
2458 priv->curr_bcn_buf = NULL;
2459}
Linux kernel - Deliverables
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