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mwifiex: remove redundant scan operation
[linux-2.6-block.git] / drivers / net / wireless / mwifiex / scan.c
CommitLineData
5e6e3a92
BZ		 1/*
2 * Marvell Wireless LAN device driver: scan ioctl and command handling
3 *
4 * Copyright (C) 2011, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20#include "decl.h"
21#include "ioctl.h"
22#include "util.h"
23#include "fw.h"
24#include "main.h"
25#include "11n.h"
26#include "cfg80211.h"
27
28/* The maximum number of channels the firmware can scan per command */
29#define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14
30
31#define MWIFIEX_CHANNELS_PER_SCAN_CMD 4
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) +
128 RSN_GTK_OUI_OFFSET);
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
151 if (((bss_desc->bcn_wpa_ie) && ((*(bss_desc->bcn_wpa_ie)).
152 vend_hdr.element_id == WLAN_EID_WPA))) {
153 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
154 oui = &mwifiex_wpa_oui[cipher][0];
155 ret = mwifiex_search_oui_in_ie(iebody, oui);
156 if (ret)
157 return ret;
158 }
159 return ret;
160}
161
162/*
163 * This function compares two SSIDs and checks if they match.
164 */
165s32
166mwifiex_ssid_cmp(struct mwifiex_802_11_ssid *ssid1,
167 struct mwifiex_802_11_ssid *ssid2)
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
179mwifiex_is_network_compatible_for_wapi(struct mwifiex_private *priv,
180 struct mwifiex_bssdescriptor *bss_desc)
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
196mwifiex_is_network_compatible_for_no_sec(struct mwifiex_private *priv,
197 struct mwifiex_bssdescriptor *bss_desc)
198{
199 if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED
200 && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled
201 && ((!bss_desc->bcn_wpa_ie) ||
202 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
203 WLAN_EID_WPA))
204 && ((!bss_desc->bcn_rsn_ie) ||
205 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
206 WLAN_EID_RSN))
2be50b8d
YAP		 207 && !priv->sec_info.encryption_mode
208 && !bss_desc->privacy) {
5e6e3a92
BZ		 209 return true;
210 }
211 return false;
212}
213
214/*
215 * This function checks if static WEP is enabled in driver and scanned network
216 * is compatible with it.
217 */
218static bool
219mwifiex_is_network_compatible_for_static_wep(struct mwifiex_private *priv,
220 struct mwifiex_bssdescriptor *bss_desc)
221{
222 if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_ENABLED
223 && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled
224 && bss_desc->privacy) {
225 return true;
226 }
227 return false;
228}
229
230/*
231 * This function checks if wpa is enabled in driver and scanned network is
232 * compatible with it.
233 */
234static bool
235mwifiex_is_network_compatible_for_wpa(struct mwifiex_private *priv,
7c6fa2a8 236 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92
BZ		 237{
238 if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED
239 && priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled
240 && ((bss_desc->bcn_wpa_ie) && ((*(bss_desc->bcn_wpa_ie)).vend_hdr.
241 element_id == WLAN_EID_WPA))
242 /*
243 * Privacy bit may NOT be set in some APs like
244 * LinkSys WRT54G && bss_desc->privacy
245 */
246 ) {
7c6fa2a8 247 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
5e6e3a92 248 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
7c6fa2a8 249 "EncMode=%#x privacy=%#x\n", __func__,
5e6e3a92
BZ		 250 (bss_desc->bcn_wpa_ie) ?
251 (*(bss_desc->bcn_wpa_ie)).
252 vend_hdr.element_id : 0,
253 (bss_desc->bcn_rsn_ie) ?
254 (*(bss_desc->bcn_rsn_ie)).
255 ieee_hdr.element_id : 0,
256 (priv->sec_info.wep_status ==
257 MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d",
258 (priv->sec_info.wpa_enabled) ? "e" : "d",
259 (priv->sec_info.wpa2_enabled) ? "e" : "d",
260 priv->sec_info.encryption_mode,
261 bss_desc->privacy);
262 return true;
263 }
264 return false;
265}
266
267/*
268 * This function checks if wpa2 is enabled in driver and scanned network is
269 * compatible with it.
270 */
271static bool
272mwifiex_is_network_compatible_for_wpa2(struct mwifiex_private *priv,
7c6fa2a8 273 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92
BZ		 274{
275 if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED
276 && !priv->sec_info.wpa_enabled && priv->sec_info.wpa2_enabled
277 && ((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.
278 element_id == WLAN_EID_RSN))
279 /*
280 * Privacy bit may NOT be set in some APs like
281 * LinkSys WRT54G && bss_desc->privacy
282 */
283 ) {
7c6fa2a8 284 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
5e6e3a92 285 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
7c6fa2a8 286 "EncMode=%#x privacy=%#x\n", __func__,
5e6e3a92
BZ		 287 (bss_desc->bcn_wpa_ie) ?
288 (*(bss_desc->bcn_wpa_ie)).
289 vend_hdr.element_id : 0,
290 (bss_desc->bcn_rsn_ie) ?
291 (*(bss_desc->bcn_rsn_ie)).
292 ieee_hdr.element_id : 0,
293 (priv->sec_info.wep_status ==
294 MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d",
295 (priv->sec_info.wpa_enabled) ? "e" : "d",
296 (priv->sec_info.wpa2_enabled) ? "e" : "d",
297 priv->sec_info.encryption_mode,
298 bss_desc->privacy);
299 return true;
300 }
301 return false;
302}
303
304/*
305 * This function checks if adhoc AES is enabled in driver and scanned network is
306 * compatible with it.
307 */
308static bool
309mwifiex_is_network_compatible_for_adhoc_aes(struct mwifiex_private *priv,
310 struct mwifiex_bssdescriptor *bss_desc)
311{
312 if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED
313 && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled
314 && ((!bss_desc->bcn_wpa_ie) || ((*(bss_desc->bcn_wpa_ie)).vend_hdr.
315 element_id != WLAN_EID_WPA))
316 && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.
317 element_id != WLAN_EID_RSN))
2be50b8d
YAP		 318 && !priv->sec_info.encryption_mode
319 && bss_desc->privacy) {
5e6e3a92
BZ		 320 return true;
321 }
322 return false;
323}
324
325/*
326 * This function checks if dynamic WEP is enabled in driver and scanned network
327 * is compatible with it.
328 */
329static bool
330mwifiex_is_network_compatible_for_dynamic_wep(struct mwifiex_private *priv,
7c6fa2a8 331 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92
BZ		 332{
333 if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED
334 && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled
335 && ((!bss_desc->bcn_wpa_ie) || ((*(bss_desc->bcn_wpa_ie)).vend_hdr.
336 element_id != WLAN_EID_WPA))
337 && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.
338 element_id != WLAN_EID_RSN))
2be50b8d
YAP		 339 && priv->sec_info.encryption_mode
340 && bss_desc->privacy) {
5e6e3a92 341 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
7c6fa2a8 342 "WEP: wpa_ie=%#x wpa2_ie=%#x "
5e6e3a92 343 "EncMode=%#x privacy=%#x\n",
7c6fa2a8 344 __func__,
5e6e3a92
BZ		 345 (bss_desc->bcn_wpa_ie) ?
346 (*(bss_desc->bcn_wpa_ie)).
347 vend_hdr.element_id : 0,
348 (bss_desc->bcn_rsn_ie) ?
349 (*(bss_desc->bcn_rsn_ie)).
350 ieee_hdr.element_id : 0,
351 priv->sec_info.encryption_mode,
352 bss_desc->privacy);
353 return true;
354 }
355 return false;
356}
357
358/*
359 * This function checks if a scanned network is compatible with the driver
360 * settings.
361 *
362 * WEP WPA WPA2 ad-hoc encrypt Network
363 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
364 * 0 0 0 0 NONE 0 0 0 yes No security
365 * 0 1 0 0 x 1x 1 x yes WPA (disable
366 * HT if no AES)
367 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
368 * HT if no AES)
369 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
370 * 1 0 0 0 NONE 1 0 0 yes Static WEP
371 * (disable HT)
372 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
373 *
374 * Compatibility is not matched while roaming, except for mode.
375 */
376static s32
7c6fa2a8
AK		 377mwifiex_is_network_compatible(struct mwifiex_private *priv,
378 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
5e6e3a92
BZ		 379{
380 struct mwifiex_adapter *adapter = priv->adapter;
5e6e3a92 381
5e6e3a92
BZ		 382 bss_desc->disable_11n = false;
383
384 /* Don't check for compatibility if roaming */
eecd8250
BZ		 385 if (priv->media_connected && (priv->bss_mode == NL80211_IFTYPE_STATION)
386 && (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
7c6fa2a8 387 return 0;
5e6e3a92
BZ		 388
389 if (priv->wps.session_enable) {
390 dev_dbg(adapter->dev,
391 "info: return success directly in WPS period\n");
7c6fa2a8 392 return 0;
5e6e3a92
BZ		 393 }
394
395 if (mwifiex_is_network_compatible_for_wapi(priv, bss_desc)) {
396 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
7c6fa2a8 397 return 0;
5e6e3a92
BZ		 398 }
399
400 if (bss_desc->bss_mode == mode) {
401 if (mwifiex_is_network_compatible_for_no_sec(priv, bss_desc)) {
402 /* No security */
7c6fa2a8 403 return 0;
5e6e3a92
BZ		 404 } else if (mwifiex_is_network_compatible_for_static_wep(priv,
405 bss_desc)) {
406 /* Static WEP enabled */
407 dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
408 bss_desc->disable_11n = true;
7c6fa2a8
AK		 409 return 0;
410 } else if (mwifiex_is_network_compatible_for_wpa(priv,
411 bss_desc)) {
5e6e3a92
BZ		 412 /* WPA enabled */
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(bss_desc,
420 CIPHER_SUITE_TKIP)) {
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;
5e6e3a92 430 } else if (mwifiex_is_network_compatible_for_wpa2(priv,
7c6fa2a8 431 bss_desc)) {
5e6e3a92
BZ		 432 /* WPA2 enabled */
433 if (((priv->adapter->config_bands & BAND_GN
434 || priv->adapter->config_bands & BAND_AN)
435 && bss_desc->bcn_ht_cap)
436 && !mwifiex_is_rsn_oui_present(bss_desc,
437 CIPHER_SUITE_CCMP)) {
438
439 if (mwifiex_is_rsn_oui_present(bss_desc,
440 CIPHER_SUITE_TKIP)) {
441 dev_dbg(adapter->dev,
442 "info: Disable 11n if AES "
443 "is not supported by AP\n");
444 bss_desc->disable_11n = true;
445 } else {
446 return -1;
447 }
448 }
7c6fa2a8 449 return 0;
5e6e3a92
BZ		 450 } else if (mwifiex_is_network_compatible_for_adhoc_aes(priv,
451 bss_desc)) {
452 /* Ad-hoc AES enabled */
7c6fa2a8 453 return 0;
5e6e3a92 454 } else if (mwifiex_is_network_compatible_for_dynamic_wep(priv,
7c6fa2a8 455 bss_desc)) {
5e6e3a92 456 /* Dynamic WEP enabled */
7c6fa2a8 457 return 0;
5e6e3a92
BZ		 458 }
459
460 /* Security doesn't match */
7c6fa2a8 461 dev_dbg(adapter->dev, "info: %s: failed: "
5e6e3a92
BZ		 462 "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s EncMode"
463 "=%#x privacy=%#x\n",
7c6fa2a8 464 __func__,
5e6e3a92
BZ		 465 (bss_desc->bcn_wpa_ie) ?
466 (*(bss_desc->bcn_wpa_ie)).vend_hdr.
467 element_id : 0,
468 (bss_desc->bcn_rsn_ie) ?
469 (*(bss_desc->bcn_rsn_ie)).ieee_hdr.
470 element_id : 0,
471 (priv->sec_info.wep_status ==
472 MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d",
473 (priv->sec_info.wpa_enabled) ? "e" : "d",
474 (priv->sec_info.wpa2_enabled) ? "e" : "d",
475 priv->sec_info.encryption_mode, bss_desc->privacy);
476 return -1;
477 }
478
479 /* Mode doesn't match */
480 return -1;
481}
482
5e6e3a92
BZ		 483/*
484 * This function creates a channel list for the driver to scan, based
485 * on region/band information.
486 *
487 * This routine is used for any scan that is not provided with a
488 * specific channel list to scan.
489 */
490static void
491mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
492 const struct mwifiex_user_scan_cfg
493 *user_scan_in,
494 struct mwifiex_chan_scan_param_set
495 *scan_chan_list,
496 u8 filtered_scan)
497{
498 enum ieee80211_band band;
499 struct ieee80211_supported_band *sband;
500 struct ieee80211_channel *ch;
501 struct mwifiex_adapter *adapter = priv->adapter;
502 int chan_idx = 0, i;
5e6e3a92
BZ		 503
504 for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
505
506 if (!priv->wdev->wiphy->bands[band])
507 continue;
508
509 sband = priv->wdev->wiphy->bands[band];
510
d06b7b9e 511 for (i = 0; (i < sband->n_channels) ; i++) {
5e6e3a92
BZ		 512 ch = &sband->channels[i];
513 if (ch->flags & IEEE80211_CHAN_DISABLED)
514 continue;
515 scan_chan_list[chan_idx].radio_type = band;
186630c2 516
5e6e3a92
BZ		 517 if (user_scan_in &&
518 user_scan_in->chan_list[0].scan_time)
519 scan_chan_list[chan_idx].max_scan_time =
520 cpu_to_le16((u16) user_scan_in->
521 chan_list[0].scan_time);
186630c2 522 else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
5e6e3a92
BZ		 523 scan_chan_list[chan_idx].max_scan_time =
524 cpu_to_le16(adapter->passive_scan_time);
525 else
526 scan_chan_list[chan_idx].max_scan_time =
527 cpu_to_le16(adapter->active_scan_time);
186630c2
AK		 528
529 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
5e6e3a92
BZ		 530 scan_chan_list[chan_idx].chan_scan_mode_bitmap
531 |= MWIFIEX_PASSIVE_SCAN;
532 else
533 scan_chan_list[chan_idx].chan_scan_mode_bitmap
534 &= ~MWIFIEX_PASSIVE_SCAN;
535 scan_chan_list[chan_idx].chan_number =
536 (u32) ch->hw_value;
537 if (filtered_scan) {
538 scan_chan_list[chan_idx].max_scan_time =
539 cpu_to_le16(adapter->specific_scan_time);
540 scan_chan_list[chan_idx].chan_scan_mode_bitmap
541 |= MWIFIEX_DISABLE_CHAN_FILT;
542 }
d06b7b9e 543 chan_idx++;
5e6e3a92
BZ		 544 }
545
546 }
547}
548
549/*
550 * This function constructs and sends multiple scan config commands to
551 * the firmware.
552 *
553 * Previous routines in the code flow have created a scan command configuration
554 * with any requested TLVs. This function splits the channel TLV into maximum
555 * channels supported per scan lists and sends the portion of the channel TLV,
556 * along with the other TLVs, to the firmware.
557 */
558static int
600f5d90 559mwifiex_scan_channel_list(struct mwifiex_private *priv,
5e6e3a92
BZ		 560 u32 max_chan_per_scan, u8 filtered_scan,
561 struct mwifiex_scan_cmd_config *scan_cfg_out,
562 struct mwifiex_ie_types_chan_list_param_set
563 *chan_tlv_out,
564 struct mwifiex_chan_scan_param_set *scan_chan_list)
565{
566 int ret = 0;
567 struct mwifiex_chan_scan_param_set *tmp_chan_list;
568 struct mwifiex_chan_scan_param_set *start_chan;
569
570 u32 tlv_idx;
571 u32 total_scan_time;
572 u32 done_early;
573
574 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
575 dev_dbg(priv->adapter->dev,
576 "info: Scan: Null detect: %p, %p, %p\n",
577 scan_cfg_out, chan_tlv_out, scan_chan_list);
578 return -1;
579 }
580
581 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
582
583 /* Set the temp channel struct pointer to the start of the desired
584 list */
585 tmp_chan_list = scan_chan_list;
586
587 /* Loop through the desired channel list, sending a new firmware scan
588 commands for each max_chan_per_scan channels (or for 1,6,11
589 individually if configured accordingly) */
590 while (tmp_chan_list->chan_number) {
591
592 tlv_idx = 0;
593 total_scan_time = 0;
594 chan_tlv_out->header.len = 0;
595 start_chan = tmp_chan_list;
596 done_early = false;
597
598 /*
599 * Construct the Channel TLV for the scan command. Continue to
600 * insert channel TLVs until:
601 * - the tlv_idx hits the maximum configured per scan command
602 * - the next channel to insert is 0 (end of desired channel
603 * list)
604 * - done_early is set (controlling individual scanning of
605 * 1,6,11)
606 */
607 while (tlv_idx < max_chan_per_scan
608 && tmp_chan_list->chan_number && !done_early) {
609
610 dev_dbg(priv->adapter->dev,
611 "info: Scan: Chan(%3d), Radio(%d),"
612 " Mode(%d, %d), Dur(%d)\n",
613 tmp_chan_list->chan_number,
614 tmp_chan_list->radio_type,
615 tmp_chan_list->chan_scan_mode_bitmap
616 & MWIFIEX_PASSIVE_SCAN,
617 (tmp_chan_list->chan_scan_mode_bitmap
618 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
619 le16_to_cpu(tmp_chan_list->max_scan_time));
620
621 /* Copy the current channel TLV to the command being
622 prepared */
623 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
624 tmp_chan_list,
625 sizeof(chan_tlv_out->chan_scan_param));
626
627 /* Increment the TLV header length by the size
628 appended */
629 chan_tlv_out->header.len =
630 cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) +
631 (sizeof(chan_tlv_out->chan_scan_param)));
632
633 /*
634 * The tlv buffer length is set to the number of bytes
635 * of the between the channel tlv pointer and the start
636 * of the tlv buffer. This compensates for any TLVs
637 * that were appended before the channel list.
638 */
639 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
640 scan_cfg_out->tlv_buf);
641
642 /* Add the size of the channel tlv header and the data
643 length */
644 scan_cfg_out->tlv_buf_len +=
645 (sizeof(chan_tlv_out->header)
646 + le16_to_cpu(chan_tlv_out->header.len));
647
648 /* Increment the index to the channel tlv we are
649 constructing */
650 tlv_idx++;
651
652 /* Count the total scan time per command */
653 total_scan_time +=
654 le16_to_cpu(tmp_chan_list->max_scan_time);
655
656 done_early = false;
657
658 /* Stop the loop if the *current* channel is in the
659 1,6,11 set and we are not filtering on a BSSID
660 or SSID. */
661 if (!filtered_scan && (tmp_chan_list->chan_number == 1
662 || tmp_chan_list->chan_number == 6
663 || tmp_chan_list->chan_number == 11))
664 done_early = true;
665
666 /* Increment the tmp pointer to the next channel to
667 be scanned */
668 tmp_chan_list++;
669
670 /* Stop the loop if the *next* channel is in the 1,6,11
671 set. This will cause it to be the only channel
672 scanned on the next interation */
673 if (!filtered_scan && (tmp_chan_list->chan_number == 1
674 || tmp_chan_list->chan_number == 6
675 || tmp_chan_list->chan_number == 11))
676 done_early = true;
677 }
678
679 /* The total scan time should be less than scan command timeout
680 value */
681 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
682 dev_err(priv->adapter->dev, "total scan time %dms"
683 " is over limit (%dms), scan skipped\n",
684 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
685 ret = -1;
686 break;
687 }
688
689 priv->adapter->scan_channels = start_chan;
690
691 /* Send the scan command to the firmware with the specified
692 cfg */
600f5d90
AK		 693 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
694 HostCmd_ACT_GEN_SET, 0,
695 scan_cfg_out);
5e6e3a92
BZ		 696 if (ret)
697 break;
698 }
699
700 if (ret)
701 return -1;
702
703 return 0;
704}
705
706/*
707 * This function constructs a scan command configuration structure to use
708 * in scan commands.
709 *
710 * Application layer or other functions can invoke network scanning
711 * with a scan configuration supplied in a user scan configuration structure.
712 * This structure is used as the basis of one or many scan command configuration
713 * commands that are sent to the command processing module and eventually to the
714 * firmware.
715 *
716 * This function creates a scan command configuration structure based on the
717 * following user supplied parameters (if present):
718 * - SSID filter
719 * - BSSID filter
720 * - Number of Probes to be sent
721 * - Channel list
722 *
723 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
724 * If the number of probes is not set, adapter default setting is used.
725 */
726static void
727mwifiex_scan_setup_scan_config(struct mwifiex_private *priv,
728 const struct mwifiex_user_scan_cfg *user_scan_in,
729 struct mwifiex_scan_cmd_config *scan_cfg_out,
730 struct mwifiex_ie_types_chan_list_param_set
731 **chan_list_out,
732 struct mwifiex_chan_scan_param_set
733 *scan_chan_list,
734 u8 *max_chan_per_scan, u8 *filtered_scan,
735 u8 *scan_current_only)
736{
737 struct mwifiex_adapter *adapter = priv->adapter;
738 struct mwifiex_ie_types_num_probes *num_probes_tlv;
739 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
740 struct mwifiex_ie_types_rates_param_set *rates_tlv;
741 const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
742 u8 *tlv_pos;
743 u32 num_probes;
744 u32 ssid_len;
745 u32 chan_idx;
746 u32 scan_type;
747 u16 scan_dur;
748 u8 channel;
749 u8 radio_type;
750 u32 ssid_idx;
751 u8 ssid_filter;
752 u8 rates[MWIFIEX_SUPPORTED_RATES];
753 u32 rates_size;
754 struct mwifiex_ie_types_htcap *ht_cap;
755
756 /* The tlv_buf_len is calculated for each scan command. The TLVs added
757 in this routine will be preserved since the routine that sends the
758 command will append channelTLVs at *chan_list_out. The difference
759 between the *chan_list_out and the tlv_buf start will be used to
760 calculate the size of anything we add in this routine. */
761 scan_cfg_out->tlv_buf_len = 0;
762
763 /* Running tlv pointer. Assigned to chan_list_out at end of function
764 so later routines know where channels can be added to the command
765 buf */
766 tlv_pos = scan_cfg_out->tlv_buf;
767
768 /* Initialize the scan as un-filtered; the flag is later set to TRUE
769 below if a SSID or BSSID filter is sent in the command */
770 *filtered_scan = false;
771
772 /* Initialize the scan as not being only on the current channel. If
773 the channel list is customized, only contains one channel, and is
774 the active channel, this is set true and data flow is not halted. */
775 *scan_current_only = false;
776
777 if (user_scan_in) {
778
779 /* Default the ssid_filter flag to TRUE, set false under
780 certain wildcard conditions and qualified by the existence
781 of an SSID list before marking the scan as filtered */
782 ssid_filter = true;
783
784 /* Set the BSS type scan filter, use Adapter setting if
785 unset */
786 scan_cfg_out->bss_mode =
787 (user_scan_in->bss_mode ? (u8) user_scan_in->
788 bss_mode : (u8) adapter->scan_mode);
789
790 /* Set the number of probes to send, use Adapter setting
791 if unset */
792 num_probes =
793 (user_scan_in->num_probes ? user_scan_in->
794 num_probes : adapter->scan_probes);
795
796 /*
797 * Set the BSSID filter to the incoming configuration,
798 * if non-zero. If not set, it will remain disabled
799 * (all zeros).
800 */
801 memcpy(scan_cfg_out->specific_bssid,
802 user_scan_in->specific_bssid,
803 sizeof(scan_cfg_out->specific_bssid));
804
805 for (ssid_idx = 0;
806 ((ssid_idx < ARRAY_SIZE(user_scan_in->ssid_list))
807 && (*user_scan_in->ssid_list[ssid_idx].ssid
808 || user_scan_in->ssid_list[ssid_idx].max_len));
809 ssid_idx++) {
810
811 ssid_len = strlen(user_scan_in->ssid_list[ssid_idx].
812 ssid) + 1;
813
814 wildcard_ssid_tlv =
815 (struct mwifiex_ie_types_wildcard_ssid_params *)
816 tlv_pos;
817 wildcard_ssid_tlv->header.type =
818 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
819 wildcard_ssid_tlv->header.len = cpu_to_le16(
820 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
821 max_ssid_length)));
fada1058
AK		 822
823 /* max_ssid_length = 0 tells firmware to perform
824 specific scan for the SSID filled */
825 wildcard_ssid_tlv->max_ssid_length = 0;
5e6e3a92
BZ		 826
827 memcpy(wildcard_ssid_tlv->ssid,
828 user_scan_in->ssid_list[ssid_idx].ssid,
829 ssid_len);
830
831 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
832 + le16_to_cpu(wildcard_ssid_tlv->header.len));
833
834 dev_dbg(adapter->dev, "info: scan: ssid_list[%d]: %s, %d\n",
835 ssid_idx, wildcard_ssid_tlv->ssid,
836 wildcard_ssid_tlv->max_ssid_length);
837
838 /* Empty wildcard ssid with a maxlen will match many or
839 potentially all SSIDs (maxlen == 32), therefore do
840 not treat the scan as
841 filtered. */
842 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
843 ssid_filter = false;
844
845 }
846
847 /*
848 * The default number of channels sent in the command is low to
849 * ensure the response buffer from the firmware does not
850 * truncate scan results. That is not an issue with an SSID
851 * or BSSID filter applied to the scan results in the firmware.
852 */
853 if ((ssid_idx && ssid_filter)
854 || memcmp(scan_cfg_out->specific_bssid, &zero_mac,
855 sizeof(zero_mac)))
856 *filtered_scan = true;
857 } else {
858 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
859 num_probes = adapter->scan_probes;
860 }
861
862 /*
863 * If a specific BSSID or SSID is used, the number of channels in the
864 * scan command will be increased to the absolute maximum.
865 */
866 if (*filtered_scan)
867 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
868 else
869 *max_chan_per_scan = MWIFIEX_CHANNELS_PER_SCAN_CMD;
870
871 /* If the input config or adapter has the number of Probes set,
872 add tlv */
873 if (num_probes) {
874
875 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
876 num_probes);
877
878 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
879 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
880 num_probes_tlv->header.len =
881 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
882 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
883
884 tlv_pos += sizeof(num_probes_tlv->header) +
885 le16_to_cpu(num_probes_tlv->header.len);
886
887 }
888
889 /* Append rates tlv */
890 memset(rates, 0, sizeof(rates));
891
892 rates_size = mwifiex_get_supported_rates(priv, rates);
893
894 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
895 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
896 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
897 memcpy(rates_tlv->rates, rates, rates_size);
898 tlv_pos += sizeof(rates_tlv->header) + rates_size;
899
900 dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
901
902 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info)
903 && (priv->adapter->config_bands & BAND_GN
904 || priv->adapter->config_bands & BAND_AN)) {
905 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
906 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
907 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
908 ht_cap->header.len =
909 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
a46b7b5c
AK		 910 radio_type =
911 mwifiex_band_to_radio_type(priv->adapter->config_bands);
912 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
5e6e3a92
BZ		 913 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
914 }
915
916 /* Append vendor specific IE TLV */
917 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
918
919 /*
920 * Set the output for the channel TLV to the address in the tlv buffer
921 * past any TLVs that were added in this function (SSID, num_probes).
922 * Channel TLVs will be added past this for each scan command,
923 * preserving the TLVs that were previously added.
924 */
925 *chan_list_out =
926 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
927
928 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
929
930 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
931
932 for (chan_idx = 0;
933 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX
934 && user_scan_in->chan_list[chan_idx].chan_number;
935 chan_idx++) {
936
937 channel = user_scan_in->chan_list[chan_idx].chan_number;
938 (scan_chan_list + chan_idx)->chan_number = channel;
939
940 radio_type =
941 user_scan_in->chan_list[chan_idx].radio_type;
942 (scan_chan_list + chan_idx)->radio_type = radio_type;
943
944 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
945
946 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
947 (scan_chan_list +
948 chan_idx)->chan_scan_mode_bitmap
949 |= MWIFIEX_PASSIVE_SCAN;
950 else
951 (scan_chan_list +
952 chan_idx)->chan_scan_mode_bitmap
953 &= ~MWIFIEX_PASSIVE_SCAN;
954
955 if (user_scan_in->chan_list[chan_idx].scan_time) {
956 scan_dur = (u16) user_scan_in->
957 chan_list[chan_idx].scan_time;
958 } else {
959 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
960 scan_dur = adapter->passive_scan_time;
961 else if (*filtered_scan)
962 scan_dur = adapter->specific_scan_time;
963 else
964 scan_dur = adapter->active_scan_time;
965 }
966
967 (scan_chan_list + chan_idx)->min_scan_time =
968 cpu_to_le16(scan_dur);
969 (scan_chan_list + chan_idx)->max_scan_time =
970 cpu_to_le16(scan_dur);
971 }
972
973 /* Check if we are only scanning the current channel */
974 if ((chan_idx == 1)
975 && (user_scan_in->chan_list[0].chan_number
976 == priv->curr_bss_params.bss_descriptor.channel)) {
977 *scan_current_only = true;
978 dev_dbg(adapter->dev,
979 "info: Scan: Scanning current channel only\n");
980 }
981
982 } else {
983 dev_dbg(adapter->dev,
984 "info: Scan: Creating full region channel list\n");
985 mwifiex_scan_create_channel_list(priv, user_scan_in,
986 scan_chan_list,
987 *filtered_scan);
988 }
989}
990
991/*
992 * This function inspects the scan response buffer for pointers to
993 * expected TLVs.
994 *
995 * TLVs can be included at the end of the scan response BSS information.
996 *
997 * Data in the buffer is parsed pointers to TLVs that can potentially
998 * be passed back in the response.
999 */
1000static void
1001mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1002 struct mwifiex_ie_types_data *tlv,
1003 u32 tlv_buf_size, u32 req_tlv_type,
1004 struct mwifiex_ie_types_data **tlv_data)
1005{
1006 struct mwifiex_ie_types_data *current_tlv;
1007 u32 tlv_buf_left;
1008 u32 tlv_type;
1009 u32 tlv_len;
1010
1011 current_tlv = tlv;
1012 tlv_buf_left = tlv_buf_size;
1013 *tlv_data = NULL;
1014
1015 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1016 tlv_buf_size);
1017
1018 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1019
1020 tlv_type = le16_to_cpu(current_tlv->header.type);
1021 tlv_len = le16_to_cpu(current_tlv->header.len);
1022
1023 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1024 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1025 break;
1026 }
1027
1028 if (req_tlv_type == tlv_type) {
1029 switch (tlv_type) {
1030 case TLV_TYPE_TSFTIMESTAMP:
1031 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1032 "timestamp TLV, len = %d\n", tlv_len);
1033 *tlv_data = (struct mwifiex_ie_types_data *)
1034 current_tlv;
1035 break;
1036 case TLV_TYPE_CHANNELBANDLIST:
1037 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1038 " band list TLV, len = %d\n", tlv_len);
1039 *tlv_data = (struct mwifiex_ie_types_data *)
1040 current_tlv;
1041 break;
1042 default:
1043 dev_err(adapter->dev,
1044 "SCAN_RESP: unhandled TLV = %d\n",
1045 tlv_type);
1046 /* Give up, this seems corrupted */
1047 return;
1048 }
1049 }
1050
1051 if (*tlv_data)
1052 break;
1053
1054
1055 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1056 current_tlv =
1057 (struct mwifiex_ie_types_data *) (current_tlv->data +
1058 tlv_len);
1059
1060 } /* while */
1061}
1062
1063/*
7c6fa2a8
AK		 1064 * This function parses provided beacon buffer and updates
1065 * respective fields in bss descriptor structure.
5e6e3a92 1066 */
7c6fa2a8
AK		 1067int
1068mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1069 struct mwifiex_bssdescriptor *bss_entry,
1070 u8 *ie_buf, u32 ie_len)
5e6e3a92
BZ		 1071{
1072 int ret = 0;
1073 u8 element_id;
1074 struct ieee_types_fh_param_set *fh_param_set;
1075 struct ieee_types_ds_param_set *ds_param_set;
1076 struct ieee_types_cf_param_set *cf_param_set;
1077 struct ieee_types_ibss_param_set *ibss_param_set;
5e6e3a92
BZ		 1078 u8 *current_ptr;
1079 u8 *rate;
1080 u8 element_len;
1081 u16 total_ie_len;
1082 u8 bytes_to_copy;
1083 u8 rate_size;
5e6e3a92 1084 u8 found_data_rate_ie;
7c6fa2a8 1085 u32 bytes_left;
5e6e3a92
BZ		 1086 struct ieee_types_vendor_specific *vendor_ie;
1087 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1088 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1089
1090 found_data_rate_ie = false;
1091 rate_size = 0;
7c6fa2a8
AK		 1092 current_ptr = ie_buf;
1093 bytes_left = ie_len;
1094 bss_entry->beacon_buf = ie_buf;
1095 bss_entry->beacon_buf_size = ie_len;
5e6e3a92
BZ		 1096
1097 /* Process variable IE */
7c6fa2a8 1098 while (bytes_left >= 2) {
5e6e3a92
BZ		 1099 element_id = *current_ptr;
1100 element_len = *(current_ptr + 1);
1101 total_ie_len = element_len + sizeof(struct ieee_types_header);
1102
7c6fa2a8 1103 if (bytes_left < total_ie_len) {
5e6e3a92
BZ		 1104 dev_err(adapter->dev, "err: InterpretIE: in processing"
1105 " IE, bytes left < IE length\n");
7c6fa2a8 1106 return -1;
5e6e3a92
BZ		 1107 }
1108 switch (element_id) {
1109 case WLAN_EID_SSID:
1110 bss_entry->ssid.ssid_len = element_len;
1111 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1112 element_len);
7c6fa2a8
AK		 1113 dev_dbg(adapter->dev, "info: InterpretIE: ssid: "
1114 "%-32s\n", bss_entry->ssid.ssid);
5e6e3a92
BZ		 1115 break;
1116
1117 case WLAN_EID_SUPP_RATES:
1118 memcpy(bss_entry->data_rates, current_ptr + 2,
1119 element_len);
1120 memcpy(bss_entry->supported_rates, current_ptr + 2,
1121 element_len);
1122 rate_size = element_len;
1123 found_data_rate_ie = true;
1124 break;
1125
1126 case WLAN_EID_FH_PARAMS:
1127 fh_param_set =
1128 (struct ieee_types_fh_param_set *) current_ptr;
1129 memcpy(&bss_entry->phy_param_set.fh_param_set,
1130 fh_param_set,
1131 sizeof(struct ieee_types_fh_param_set));
1132 break;
1133
1134 case WLAN_EID_DS_PARAMS:
1135 ds_param_set =
1136 (struct ieee_types_ds_param_set *) current_ptr;
1137
1138 bss_entry->channel = ds_param_set->current_chan;
1139
1140 memcpy(&bss_entry->phy_param_set.ds_param_set,
1141 ds_param_set,
1142 sizeof(struct ieee_types_ds_param_set));
1143 break;
1144
1145 case WLAN_EID_CF_PARAMS:
1146 cf_param_set =
1147 (struct ieee_types_cf_param_set *) current_ptr;
1148 memcpy(&bss_entry->ss_param_set.cf_param_set,
1149 cf_param_set,
1150 sizeof(struct ieee_types_cf_param_set));
1151 break;
1152
1153 case WLAN_EID_IBSS_PARAMS:
1154 ibss_param_set =
1155 (struct ieee_types_ibss_param_set *)
1156 current_ptr;
1157 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1158 ibss_param_set,
1159 sizeof(struct ieee_types_ibss_param_set));
1160 break;
1161
1162 case WLAN_EID_ERP_INFO:
1163 bss_entry->erp_flags = *(current_ptr + 2);
1164 break;
1165
1166 case WLAN_EID_EXT_SUPP_RATES:
1167 /*
1168 * Only process extended supported rate
1169 * if data rate is already found.
1170 * Data rate IE should come before
1171 * extended supported rate IE
1172 */
1173 if (found_data_rate_ie) {
1174 if ((element_len + rate_size) >
1175 MWIFIEX_SUPPORTED_RATES)
1176 bytes_to_copy =
1177 (MWIFIEX_SUPPORTED_RATES -
1178 rate_size);
1179 else
1180 bytes_to_copy = element_len;
1181
1182 rate = (u8 *) bss_entry->data_rates;
1183 rate += rate_size;
1184 memcpy(rate, current_ptr + 2, bytes_to_copy);
1185
1186 rate = (u8 *) bss_entry->supported_rates;
1187 rate += rate_size;
1188 memcpy(rate, current_ptr + 2, bytes_to_copy);
1189 }
1190 break;
1191
1192 case WLAN_EID_VENDOR_SPECIFIC:
1193 vendor_ie = (struct ieee_types_vendor_specific *)
1194 current_ptr;
1195
1196 if (!memcmp
1197 (vendor_ie->vend_hdr.oui, wpa_oui,
1198 sizeof(wpa_oui))) {
1199 bss_entry->bcn_wpa_ie =
1200 (struct ieee_types_vendor_specific *)
1201 current_ptr;
1202 bss_entry->wpa_offset = (u16) (current_ptr -
1203 bss_entry->beacon_buf);
1204 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1205 sizeof(wmm_oui))) {
1206 if (total_ie_len ==
1207 sizeof(struct ieee_types_wmm_parameter)
1208 || total_ie_len ==
1209 sizeof(struct ieee_types_wmm_info))
1210 /*
1211 * Only accept and copy the WMM IE if
1212 * it matches the size expected for the
1213 * WMM Info IE or the WMM Parameter IE.
1214 */
1215 memcpy((u8 *) &bss_entry->wmm_ie,
1216 current_ptr, total_ie_len);
1217 }
1218 break;
1219 case WLAN_EID_RSN:
1220 bss_entry->bcn_rsn_ie =
1221 (struct ieee_types_generic *) current_ptr;
1222 bss_entry->rsn_offset = (u16) (current_ptr -
1223 bss_entry->beacon_buf);
1224 break;
1225 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1226 bss_entry->bcn_wapi_ie =
1227 (struct ieee_types_generic *) current_ptr;
1228 bss_entry->wapi_offset = (u16) (current_ptr -
1229 bss_entry->beacon_buf);
1230 break;
1231 case WLAN_EID_HT_CAPABILITY:
1232 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1233 (current_ptr +
1234 sizeof(struct ieee_types_header));
1235 bss_entry->ht_cap_offset = (u16) (current_ptr +
1236 sizeof(struct ieee_types_header) -
1237 bss_entry->beacon_buf);
1238 break;
1239 case WLAN_EID_HT_INFORMATION:
1240 bss_entry->bcn_ht_info = (struct ieee80211_ht_info *)
1241 (current_ptr +
1242 sizeof(struct ieee_types_header));
1243 bss_entry->ht_info_offset = (u16) (current_ptr +
1244 sizeof(struct ieee_types_header) -
1245 bss_entry->beacon_buf);
1246 break;
1247 case WLAN_EID_BSS_COEX_2040:
1248 bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr +
1249 sizeof(struct ieee_types_header));
1250 bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1251 sizeof(struct ieee_types_header) -
1252 bss_entry->beacon_buf);
1253 break;
1254 case WLAN_EID_EXT_CAPABILITY:
1255 bss_entry->bcn_ext_cap = (u8 *) (current_ptr +
1256 sizeof(struct ieee_types_header));
1257 bss_entry->ext_cap_offset = (u16) (current_ptr +
1258 sizeof(struct ieee_types_header) -
1259 bss_entry->beacon_buf);
1260 break;
5e6e3a92
BZ		 1261 default:
1262 break;
1263 }
1264
1265 current_ptr += element_len + 2;
1266
1267 /* Need to account for IE ID and IE Len */
7c6fa2a8 1268 bytes_left -= (element_len + 2);
5e6e3a92 1269
7c6fa2a8 1270 } /* while (bytes_left > 2) */
5e6e3a92
BZ		 1271 return ret;
1272}
1273
5e6e3a92
BZ		 1274/*
1275 * This function converts radio type scan parameter to a band configuration
1276 * to be used in join command.
1277 */
1278static u8
1279mwifiex_radio_type_to_band(u8 radio_type)
1280{
5e6e3a92
BZ		 1281 switch (radio_type) {
1282 case HostCmd_SCAN_RADIO_TYPE_A:
636c4598 1283 return BAND_A;
5e6e3a92
BZ		 1284 case HostCmd_SCAN_RADIO_TYPE_BG:
1285 default:
636c4598 1286 return BAND_G;
5e6e3a92 1287 }
5e6e3a92
BZ		 1288}
1289
5e6e3a92
BZ		 1290/*
1291 * This is an internal function used to start a scan based on an input
1292 * configuration.
1293 *
1294 * This uses the input user scan configuration information when provided in
1295 * order to send the appropriate scan commands to firmware to populate or
1296 * update the internal driver scan table.
1297 */
711825a0
AK		 1298static int mwifiex_scan_networks(struct mwifiex_private *priv,
1299 const struct mwifiex_user_scan_cfg *user_scan_in)
5e6e3a92
BZ		 1300{
1301 int ret = 0;
1302 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8
YAP		 1303 struct cmd_ctrl_node *cmd_node;
1304 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
5e6e3a92
BZ		 1305 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1306 u32 buf_size;
1307 struct mwifiex_chan_scan_param_set *scan_chan_list;
5e6e3a92
BZ		 1308 u8 filtered_scan;
1309 u8 scan_current_chan_only;
1310 u8 max_chan_per_scan;
1311 unsigned long flags;
1312
600f5d90 1313 if (adapter->scan_processing) {
5e6e3a92
BZ		 1314 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1315 return ret;
1316 }
1317
1318 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1319 adapter->scan_processing = true;
1320 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1321
600f5d90 1322 if (priv->scan_block) {
5e6e3a92
BZ		 1323 dev_dbg(adapter->dev,
1324 "cmd: Scan is blocked during association...\n");
1325 return ret;
1326 }
1327
1328 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1329 GFP_KERNEL);
1330 if (!scan_cfg_out) {
1331 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
b53575ec 1332 return -ENOMEM;
5e6e3a92
BZ		 1333 }
1334
1335 buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
1336 MWIFIEX_USER_SCAN_CHAN_MAX;
1337 scan_chan_list = kzalloc(buf_size, GFP_KERNEL);
1338 if (!scan_chan_list) {
1339 dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
1340 kfree(scan_cfg_out);
b53575ec 1341 return -ENOMEM;
5e6e3a92
BZ		 1342 }
1343
5e6e3a92
BZ		 1344 mwifiex_scan_setup_scan_config(priv, user_scan_in,
1345 &scan_cfg_out->config, &chan_list_out,
1346 scan_chan_list, &max_chan_per_scan,
1347 &filtered_scan, &scan_current_chan_only);
1348
600f5d90
AK		 1349 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1350 &scan_cfg_out->config, chan_list_out,
1351 scan_chan_list);
5e6e3a92
BZ		 1352
1353 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1354 if (!ret) {
1355 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1356 if (!list_empty(&adapter->scan_pending_q)) {
1357 cmd_node = list_first_entry(&adapter->scan_pending_q,
1358 struct cmd_ctrl_node, list);
1359 list_del(&cmd_node->list);
1360 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1361 flags);
efaaa8b8 1362 adapter->cmd_queued = cmd_node;
5e6e3a92
BZ		 1363 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1364 true);
1365 } else {
1366 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1367 flags);
1368 }
5e6e3a92
BZ		 1369 } else {
1370 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1371 adapter->scan_processing = true;
1372 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1373 }
1374
1375 kfree(scan_cfg_out);
1376 kfree(scan_chan_list);
1377 return ret;
1378}
1379
711825a0
AK		 1380/*
1381 * Sends IOCTL request to start a scan with user configurations.
1382 *
1383 * This function allocates the IOCTL request buffer, fills it
1384 * with requisite parameters and calls the IOCTL handler.
1385 *
1386 * Upon completion, it also generates a wireless event to notify
1387 * applications.
1388 */
1389int mwifiex_set_user_scan_ioctl(struct mwifiex_private *priv,
1390 struct mwifiex_user_scan_cfg *scan_req)
1391{
1392 int status;
1393
711825a0 1394 status = mwifiex_scan_networks(priv, scan_req);
38c9d664 1395 queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
711825a0
AK		 1396
1397 return status;
1398}
1399
5e6e3a92
BZ		 1400/*
1401 * This function prepares a scan command to be sent to the firmware.
1402 *
1403 * This uses the scan command configuration sent to the command processing
1404 * module in command preparation stage to configure a scan command structure
1405 * to send to firmware.
1406 *
1407 * The fixed fields specifying the BSS type and BSSID filters as well as a
1408 * variable number/length of TLVs are sent in the command to firmware.
1409 *
1410 * Preparation also includes -
1411 * - Setting command ID, and proper size
1412 * - Ensuring correct endian-ness
1413 */
a5ffddb7
AK		 1414int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1415 struct mwifiex_scan_cmd_config *scan_cfg)
5e6e3a92
BZ		 1416{
1417 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
5e6e3a92
BZ		 1418
1419 /* Set fixed field variables in scan command */
1420 scan_cmd->bss_mode = scan_cfg->bss_mode;
1421 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1422 sizeof(scan_cmd->bssid));
1423 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1424
1425 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1426
1427 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1428 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1429 + sizeof(scan_cmd->bssid)
1430 + scan_cfg->tlv_buf_len + S_DS_GEN));
1431
1432 return 0;
1433}
1434
7c6fa2a8
AK		 1435/*
1436 * This function checks compatibility of requested network with current
1437 * driver settings.
1438 */
1439int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1440 struct mwifiex_bssdescriptor *bss_desc)
1441{
1442 int ret = -1;
1443
1444 if (!bss_desc)
1445 return -1;
1446
1447 if ((mwifiex_get_cfp_by_band_and_channel_from_cfg80211(priv,
1448 (u8) bss_desc->bss_band, (u16) bss_desc->channel))) {
1449 switch (priv->bss_mode) {
1450 case NL80211_IFTYPE_STATION:
1451 case NL80211_IFTYPE_ADHOC:
1452 ret = mwifiex_is_network_compatible(priv, bss_desc,
1453 priv->bss_mode);
1454 if (ret)
1455 dev_err(priv->adapter->dev, "cannot find ssid "
1456 "%s\n", bss_desc->ssid.ssid);
1457 break;
1458 default:
1459 ret = 0;
1460 }
1461 }
1462
1463 return ret;
1464}
1465
1466static int
5116f3ce
AK		 1467mwifiex_update_curr_bss_params(struct mwifiex_private *priv, u8 *bssid,
1468 s32 rssi, const u8 *ie_buf, size_t ie_len,
1469 u16 beacon_period, u16 cap_info_bitmap, u8 band)
7c6fa2a8 1470{
db652e4b 1471 struct mwifiex_bssdescriptor *bss_desc;
7c6fa2a8
AK		 1472 int ret;
1473 unsigned long flags;
1474 u8 *beacon_ie;
1475
1476 /* Allocate and fill new bss descriptor */
1477 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
1478 GFP_KERNEL);
1479 if (!bss_desc) {
1480 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
1481 return -ENOMEM;
1482 }
5982b47a
YAP		 1483
1484 beacon_ie = kmemdup(ie_buf, ie_len, GFP_KERNEL);
f7503230 1485 if (!beacon_ie) {
db652e4b 1486 kfree(bss_desc);
f7503230 1487 dev_err(priv->adapter->dev, " failed to alloc beacon_ie\n");
7c6fa2a8
AK		 1488 return -ENOMEM;
1489 }
7c6fa2a8
AK		 1490
1491 ret = mwifiex_fill_new_bss_desc(priv, bssid, rssi, beacon_ie,
1492 ie_len, beacon_period,
5116f3ce 1493 cap_info_bitmap, band, bss_desc);
7c6fa2a8
AK		 1494 if (ret)
1495 goto done;
1496
1497 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1498 if (ret)
1499 goto done;
1500
1501 /* Update current bss descriptor parameters */
1502 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1503 priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL;
1504 priv->curr_bss_params.bss_descriptor.wpa_offset = 0;
1505 priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL;
1506 priv->curr_bss_params.bss_descriptor.rsn_offset = 0;
1507 priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL;
1508 priv->curr_bss_params.bss_descriptor.wapi_offset = 0;
1509 priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL;
1510 priv->curr_bss_params.bss_descriptor.ht_cap_offset =
1511 0;
1512 priv->curr_bss_params.bss_descriptor.bcn_ht_info = NULL;
1513 priv->curr_bss_params.bss_descriptor.ht_info_offset =
1514 0;
1515 priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 =
1516 NULL;
1517 priv->curr_bss_params.bss_descriptor.
1518 bss_co_2040_offset = 0;
1519 priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL;
1520 priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0;
1521 priv->curr_bss_params.bss_descriptor.beacon_buf = NULL;
1522 priv->curr_bss_params.bss_descriptor.beacon_buf_size =
1523 0;
1524
1525 /* Make a copy of current BSSID descriptor */
1526 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1527 sizeof(priv->curr_bss_params.bss_descriptor));
1528 mwifiex_save_curr_bcn(priv);
1529 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1530
1531done:
1532 kfree(bss_desc);
1533 kfree(beacon_ie);
1534 return 0;
1535}
1536
5e6e3a92
BZ		 1537/*
1538 * This function handles the command response of scan.
1539 *
1540 * The response buffer for the scan command has the following
1541 * memory layout:
1542 *
1543 * .-------------------------------------------------------------.
1544 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1545 * .-------------------------------------------------------------.
1546 * | BufSize (t_u16) : sizeof the BSS Description data |
1547 * .-------------------------------------------------------------.
1548 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1549 * .-------------------------------------------------------------.
1550 * | BSSDescription data (variable, size given in BufSize) |
1551 * .-------------------------------------------------------------.
1552 * | TLV data (variable, size calculated using Header->Size, |
1553 * | BufSize and sizeof the fixed fields above) |
1554 * .-------------------------------------------------------------.
1555 */
1556int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
600f5d90 1557 struct host_cmd_ds_command *resp)
5e6e3a92
BZ		 1558{
1559 int ret = 0;
1560 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8
YAP		 1561 struct cmd_ctrl_node *cmd_node;
1562 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
5e6e3a92
BZ		 1563 struct mwifiex_ie_types_data *tlv_data;
1564 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1565 u8 *bss_info;
1566 u32 scan_resp_size;
1567 u32 bytes_left;
5e6e3a92
BZ		 1568 u32 idx;
1569 u32 tlv_buf_size;
5e6e3a92
BZ		 1570 struct mwifiex_chan_freq_power *cfp;
1571 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1572 struct chan_band_param_set *chan_band;
5e6e3a92
BZ		 1573 u8 is_bgscan_resp;
1574 unsigned long flags;
5116f3ce 1575 struct cfg80211_bss *bss;
5e6e3a92
BZ		 1576
1577 is_bgscan_resp = (le16_to_cpu(resp->command)
1578 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1579 if (is_bgscan_resp)
1580 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1581 else
1582 scan_rsp = &resp->params.scan_resp;
1583
1584
67a50035 1585 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
5e6e3a92
BZ		 1586 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1587 scan_rsp->number_of_sets);
1588 ret = -1;
1589 goto done;
1590 }
1591
1592 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1593 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1594 bytes_left);
1595
1596 scan_resp_size = le16_to_cpu(resp->size);
1597
1598 dev_dbg(adapter->dev,
1599 "info: SCAN_RESP: returned %d APs before parsing\n",
1600 scan_rsp->number_of_sets);
1601
5e6e3a92
BZ		 1602 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1603
1604 /*
1605 * The size of the TLV buffer is equal to the entire command response
1606 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1607 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1608 * response header (S_DS_GEN)
1609 */
1610 tlv_buf_size = scan_resp_size - (bytes_left
1611 + sizeof(scan_rsp->bss_descript_size)
1612 + sizeof(scan_rsp->number_of_sets)
1613 + S_DS_GEN);
1614
1615 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1616 bss_desc_and_tlv_buffer +
1617 bytes_left);
1618
1619 /* Search the TLV buffer space in the scan response for any valid
1620 TLVs */
1621 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1622 TLV_TYPE_TSFTIMESTAMP,
1623 (struct mwifiex_ie_types_data **)
1624 &tsf_tlv);
1625
1626 /* Search the TLV buffer space in the scan response for any valid
1627 TLVs */
1628 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1629 TLV_TYPE_CHANNELBANDLIST,
1630 (struct mwifiex_ie_types_data **)
1631 &chan_band_tlv);
1632
5e6e3a92 1633 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
7c6fa2a8
AK		 1634 u8 bssid[ETH_ALEN];
1635 s32 rssi;
1636 const u8 *ie_buf;
1637 size_t ie_len;
1638 int channel = -1;
1639 u64 network_tsf = 0;
1640 u16 beacon_size = 0;
1641 u32 curr_bcn_bytes;
1642 u32 freq;
1643 u16 beacon_period;
1644 u16 cap_info_bitmap;
1645 u8 *current_ptr;
1646 struct mwifiex_bcn_param *bcn_param;
1647
1648 if (bytes_left >= sizeof(beacon_size)) {
1649 /* Extract & convert beacon size from command buffer */
1650 memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1651 bytes_left -= sizeof(beacon_size);
1652 bss_info += sizeof(beacon_size);
5e6e3a92
BZ		 1653 }
1654
7c6fa2a8
AK		 1655 if (!beacon_size || beacon_size > bytes_left) {
1656 bss_info += bytes_left;
1657 bytes_left = 0;
1658 return -1;
1659 }
5e6e3a92 1660
7c6fa2a8
AK		 1661 /* Initialize the current working beacon pointer for this BSS
1662 * iteration */
1663 current_ptr = bss_info;
1664
1665 /* Advance the return beacon pointer past the current beacon */
1666 bss_info += beacon_size;
1667 bytes_left -= beacon_size;
1668
1669 curr_bcn_bytes = beacon_size;
1670
1671 /*
1672 * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1673 * and capability information
1674 */
1675 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1676 dev_err(adapter->dev, "InterpretIE: not enough bytes left\n");
1677 continue;
1678 }
1679 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1680 current_ptr += sizeof(*bcn_param);
1681 curr_bcn_bytes -= sizeof(*bcn_param);
1682
1683 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1684
1685 rssi = (s32) (bcn_param->rssi);
1686 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%02X\n",
1687 rssi);
1688
1689 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1690
1691 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1692 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1693 cap_info_bitmap);
1694
1695 /* Rest of the current buffer are IE's */
1696 ie_buf = current_ptr;
1697 ie_len = curr_bcn_bytes;
1698 dev_dbg(adapter->dev, "info: InterpretIE: IELength for this AP"
1699 " = %d\n", curr_bcn_bytes);
1700
1701 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1702 u8 element_id, element_len;
1703
1704 element_id = *current_ptr;
1705 element_len = *(current_ptr + 1);
1706 if (curr_bcn_bytes < element_len +
1707 sizeof(struct ieee_types_header)) {
1708 dev_err(priv->adapter->dev, "%s: in processing"
1709 " IE, bytes left < IE length\n",
1710 __func__);
1711 goto done;
5e6e3a92 1712 }
7c6fa2a8
AK		 1713 if (element_id == WLAN_EID_DS_PARAMS) {
1714 channel = *(u8 *) (current_ptr +
1715 sizeof(struct ieee_types_header));
5e6e3a92
BZ		 1716 break;
1717 }
7c6fa2a8
AK		 1718
1719 current_ptr += element_len +
1720 sizeof(struct ieee_types_header);
1721 curr_bcn_bytes -= element_len +
1722 sizeof(struct ieee_types_header);
5e6e3a92
BZ		 1723 }
1724
5e6e3a92
BZ		 1725 /*
1726 * If the TSF TLV was appended to the scan results, save this
1727 * entry's TSF value in the networkTSF field.The networkTSF is
1728 * the firmware's TSF value at the time the beacon or probe
1729 * response was received.
1730 */
7c6fa2a8
AK		 1731 if (tsf_tlv)
1732 memcpy(&network_tsf,
1733 &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1734 sizeof(network_tsf));
1735
1736 if (channel != -1) {
1737 struct ieee80211_channel *chan;
1738 u8 band;
1739
1740 band = BAND_G;
1741 if (chan_band_tlv) {
1742 chan_band =
1743 &chan_band_tlv->chan_band_param[idx];
1744 band = mwifiex_radio_type_to_band(
1745 chan_band->radio_type
1746 & (BIT(0) | BIT(1)));
1747 }
5e6e3a92 1748
7c6fa2a8
AK		 1749 cfp = mwifiex_get_cfp_by_band_and_channel_from_cfg80211(
1750 priv, (u8)band, (u16)channel);
5e6e3a92 1751
7c6fa2a8 1752 freq = cfp ? cfp->freq : 0;
5e6e3a92 1753
7c6fa2a8 1754 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
5e6e3a92 1755
7c6fa2a8 1756 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
5116f3ce
AK		 1757 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1758 chan, bssid, network_tsf,
1759 cap_info_bitmap, beacon_period,
1760 ie_buf, ie_len, rssi, GFP_KERNEL);
1761 *(u8 *)bss->priv = band;
aa95a48d 1762 cfg80211_put_bss(bss);
5e6e3a92 1763
7c6fa2a8
AK		 1764 if (priv->media_connected && !memcmp(bssid,
1765 priv->curr_bss_params.bss_descriptor
1766 .mac_address, ETH_ALEN))
1767 mwifiex_update_curr_bss_params(priv,
1768 bssid, rssi, ie_buf,
1769 ie_len, beacon_period,
5116f3ce 1770 cap_info_bitmap, band);
7c6fa2a8
AK		 1771 }
1772 } else {
1773 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1774 }
1775 }
5e6e3a92
BZ		 1776
1777 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1778 if (list_empty(&adapter->scan_pending_q)) {
1779 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1780 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1781 adapter->scan_processing = false;
1782 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
5e6e3a92
BZ		 1783
1784 /* Need to indicate IOCTL complete */
600f5d90
AK		 1785 if (adapter->curr_cmd->wait_q_enabled) {
1786 adapter->cmd_wait_q.status = 0;
efaaa8b8 1787 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
5e6e3a92
BZ		 1788 }
1789 if (priv->report_scan_result)
1790 priv->report_scan_result = false;
1791 if (priv->scan_pending_on_block) {
1792 priv->scan_pending_on_block = false;
1793 up(&priv->async_sem);
1794 }
1795
38c9d664
AK		 1796 if (priv->user_scan_cfg) {
1797 dev_dbg(priv->adapter->dev, "info: %s: sending scan "
1798 "results\n", __func__);
1799 cfg80211_scan_done(priv->scan_request, 0);
1800 priv->scan_request = NULL;
1801 kfree(priv->user_scan_cfg);
1802 priv->user_scan_cfg = NULL;
1803 }
5e6e3a92
BZ		 1804 } else {
1805 /* Get scan command from scan_pending_q and put to
1806 cmd_pending_q */
1807 cmd_node = list_first_entry(&adapter->scan_pending_q,
1808 struct cmd_ctrl_node, list);
1809 list_del(&cmd_node->list);
1810 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1811
1812 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
1813 }
1814
1815done:
5e6e3a92
BZ		 1816 return ret;
1817}
1818
1819/*
1820 * This function prepares command for background scan query.
1821 *
1822 * Preparation includes -
1823 * - Setting command ID and proper size
1824 * - Setting background scan flush parameter
1825 * - Ensuring correct endian-ness
1826 */
572e8f3e 1827int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
5e6e3a92
BZ		 1828{
1829 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1830 &cmd->params.bg_scan_query;
1831
1832 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1833 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1834 + S_DS_GEN);
1835
1836 bg_query->flush = 1;
1837
1838 return 0;
1839}
1840
5e6e3a92
BZ		 1841/*
1842 * This function inserts scan command node to the scan pending queue.
1843 */
1844void
1845mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1846 struct cmd_ctrl_node *cmd_node)
1847{
1848 struct mwifiex_adapter *adapter = priv->adapter;
1849 unsigned long flags;
1850
600f5d90 1851 cmd_node->wait_q_enabled = true;
efaaa8b8 1852 cmd_node->condition = &adapter->scan_wait_q_woken;
5e6e3a92
BZ		 1853 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1854 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1855 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1856}
1857
5e6e3a92
BZ		 1858/*
1859 * This function sends a scan command for all available channels to the
1860 * firmware, filtered on a specific SSID.
1861 */
1862static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
600f5d90 1863 struct mwifiex_802_11_ssid *req_ssid)
5e6e3a92
BZ		 1864{
1865 struct mwifiex_adapter *adapter = priv->adapter;
1866 int ret = 0;
1867 struct mwifiex_user_scan_cfg *scan_cfg;
1868
1869 if (!req_ssid)
1870 return -1;
1871
600f5d90 1872 if (adapter->scan_processing) {
5e6e3a92
BZ		 1873 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1874 return ret;
1875 }
1876
600f5d90 1877 if (priv->scan_block) {
5e6e3a92
BZ		 1878 dev_dbg(adapter->dev,
1879 "cmd: Scan is blocked during association...\n");
1880 return ret;
1881 }
1882
5e6e3a92
BZ		 1883 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1884 if (!scan_cfg) {
1885 dev_err(adapter->dev, "failed to alloc scan_cfg\n");
b53575ec 1886 return -ENOMEM;
5e6e3a92
BZ		 1887 }
1888
1889 memcpy(scan_cfg->ssid_list[0].ssid, req_ssid->ssid,
1890 req_ssid->ssid_len);
5e6e3a92 1891
600f5d90 1892 ret = mwifiex_scan_networks(priv, scan_cfg);
5e6e3a92
BZ		 1893
1894 kfree(scan_cfg);
1895 return ret;
1896}
1897
1898/*
1899 * Sends IOCTL request to start a scan.
1900 *
1901 * This function allocates the IOCTL request buffer, fills it
1902 * with requisite parameters and calls the IOCTL handler.
1903 *
1904 * Scan command can be issued for both normal scan and specific SSID
1905 * scan, depending upon whether an SSID is provided or not.
1906 */
600f5d90 1907int mwifiex_request_scan(struct mwifiex_private *priv,
5e6e3a92
BZ		 1908 struct mwifiex_802_11_ssid *req_ssid)
1909{
270e58e8 1910 int ret;
5e6e3a92
BZ		 1911
1912 if (down_interruptible(&priv->async_sem)) {
1913 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1914 __func__);
1915 return -1;
1916 }
1917 priv->scan_pending_on_block = true;
1918
efaaa8b8 1919 priv->adapter->scan_wait_q_woken = false;
5e6e3a92
BZ		 1920
1921 if (req_ssid && req_ssid->ssid_len != 0)
1922 /* Specific SSID scan */
600f5d90 1923 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
5e6e3a92
BZ		 1924 else
1925 /* Normal scan */
600f5d90
AK		 1926 ret = mwifiex_scan_networks(priv, NULL);
1927
1928 if (!ret)
1929 ret = mwifiex_wait_queue_complete(priv->adapter);
1930
5e6e3a92
BZ		 1931 if (ret == -1) {
1932 priv->scan_pending_on_block = false;
1933 up(&priv->async_sem);
1934 }
600f5d90 1935
5e6e3a92
BZ		 1936 return ret;
1937}
1938
1939/*
1940 * This function appends the vendor specific IE TLV to a buffer.
1941 */
1942int
1943mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1944 u16 vsie_mask, u8 **buffer)
1945{
1946 int id, ret_len = 0;
1947 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1948
1949 if (!buffer)
1950 return 0;
1951 if (!(*buffer))
1952 return 0;
1953
1954 /*
1955 * Traverse through the saved vendor specific IE array and append
1956 * the selected(scan/assoc/adhoc) IE as TLV to the command
1957 */
1958 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1959 if (priv->vs_ie[id].mask & vsie_mask) {
1960 vs_param_set =
1961 (struct mwifiex_ie_types_vendor_param_set *)
1962 *buffer;
1963 vs_param_set->header.type =
1964 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
1965 vs_param_set->header.len =
1966 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
1967 & 0x00FF) + 2);
1968 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
1969 le16_to_cpu(vs_param_set->header.len));
1970 *buffer += le16_to_cpu(vs_param_set->header.len) +
1971 sizeof(struct mwifiex_ie_types_header);
1972 ret_len += le16_to_cpu(vs_param_set->header.len) +
1973 sizeof(struct mwifiex_ie_types_header);
1974 }
1975 }
1976 return ret_len;
1977}
1978
1979/*
1980 * This function saves a beacon buffer of the current BSS descriptor.
1981 *
1982 * The current beacon buffer is saved so that it can be restored in the
1983 * following cases that makes the beacon buffer not to contain the current
1984 * ssid's beacon buffer.
1985 * - The current ssid was not found somehow in the last scan.
1986 * - The current ssid was the last entry of the scan table and overloaded.
1987 */
1988void
1989mwifiex_save_curr_bcn(struct mwifiex_private *priv)
1990{
1991 struct mwifiex_bssdescriptor *curr_bss =
1992 &priv->curr_bss_params.bss_descriptor;
1993
030fe797
AK		 1994 if (!curr_bss->beacon_buf_size)
1995 return;
5e6e3a92 1996
030fe797
AK		 1997 /* allocate beacon buffer at 1st time; or if it's size has changed */
1998 if (!priv->curr_bcn_buf ||
1999 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
5e6e3a92 2000 priv->curr_bcn_size = curr_bss->beacon_buf_size;
5e6e3a92 2001
030fe797 2002 kfree(priv->curr_bcn_buf);
5982b47a 2003 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
75ac9a28 2004 GFP_ATOMIC);
5e6e3a92
BZ		 2005 if (!priv->curr_bcn_buf) {
2006 dev_err(priv->adapter->dev,
2007 "failed to alloc curr_bcn_buf\n");
030fe797 2008 return;
5e6e3a92
BZ		 2009 }
2010 }
030fe797
AK		 2011
2012 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
2013 curr_bss->beacon_buf_size);
2014 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2015 priv->curr_bcn_size);
7c6fa2a8
AK		 2016
2017 curr_bss->beacon_buf = priv->curr_bcn_buf;
2018
2019 /* adjust the pointers in the current BSS descriptor */
2020 if (curr_bss->bcn_wpa_ie)
2021 curr_bss->bcn_wpa_ie =
2022 (struct ieee_types_vendor_specific *)
2023 (curr_bss->beacon_buf +
2024 curr_bss->wpa_offset);
2025
2026 if (curr_bss->bcn_rsn_ie)
2027 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2028 (curr_bss->beacon_buf +
2029 curr_bss->rsn_offset);
2030
2031 if (curr_bss->bcn_ht_cap)
2032 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2033 (curr_bss->beacon_buf +
2034 curr_bss->ht_cap_offset);
2035
2036 if (curr_bss->bcn_ht_info)
2037 curr_bss->bcn_ht_info = (struct ieee80211_ht_info *)
2038 (curr_bss->beacon_buf +
2039 curr_bss->ht_info_offset);
2040
2041 if (curr_bss->bcn_bss_co_2040)
2042 curr_bss->bcn_bss_co_2040 =
2043 (u8 *) (curr_bss->beacon_buf +
2044 curr_bss->bss_co_2040_offset);
2045
2046 if (curr_bss->bcn_ext_cap)
2047 curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf +
2048 curr_bss->ext_cap_offset);
5e6e3a92
BZ		 2049}
2050
2051/*
2052 * This function frees the current BSS descriptor beacon buffer.
2053 */
2054void
2055mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2056{
2057 kfree(priv->curr_bcn_buf);
2058 priv->curr_bcn_buf = NULL;
2059}
Linux 6.x block layer and io_uring tree(s)