1 /*
2  * Implement cfg80211 ("iw") support.
3  *
4  * Copyright (C) 2009 M&N Solutions GmbH, 61191 Rosbach, Germany
5  * Holger Schurig <hs4233@mail.mn-solutions.de>
6  *
7  */
8 
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 
11 #include <linux/hardirq.h>
12 #include <linux/sched.h>
13 #include <linux/wait.h>
14 #include <linux/slab.h>
15 #include <linux/ieee80211.h>
16 #include <net/cfg80211.h>
17 #include <asm/unaligned.h>
18 
19 #include "decl.h"
20 #include "cfg.h"
21 #include "cmd.h"
22 #include "mesh.h"
23 
24 
25 #define CHAN2G(_channel, _freq, _flags) {        \
26 	.band             = IEEE80211_BAND_2GHZ, \
27 	.center_freq      = (_freq),             \
28 	.hw_value         = (_channel),          \
29 	.flags            = (_flags),            \
30 	.max_antenna_gain = 0,                   \
31 	.max_power        = 30,                  \
32 }
33 
34 static struct ieee80211_channel lbs_2ghz_channels[] = {
35 	CHAN2G(1,  2412, 0),
36 	CHAN2G(2,  2417, 0),
37 	CHAN2G(3,  2422, 0),
38 	CHAN2G(4,  2427, 0),
39 	CHAN2G(5,  2432, 0),
40 	CHAN2G(6,  2437, 0),
41 	CHAN2G(7,  2442, 0),
42 	CHAN2G(8,  2447, 0),
43 	CHAN2G(9,  2452, 0),
44 	CHAN2G(10, 2457, 0),
45 	CHAN2G(11, 2462, 0),
46 	CHAN2G(12, 2467, 0),
47 	CHAN2G(13, 2472, 0),
48 	CHAN2G(14, 2484, 0),
49 };
50 
51 #define RATETAB_ENT(_rate, _hw_value, _flags) { \
52 	.bitrate  = (_rate),                    \
53 	.hw_value = (_hw_value),                \
54 	.flags    = (_flags),                   \
55 }
56 
57 
58 /* Table 6 in section 3.2.1.1 */
59 static struct ieee80211_rate lbs_rates[] = {
60 	RATETAB_ENT(10,  0,  0),
61 	RATETAB_ENT(20,  1,  0),
62 	RATETAB_ENT(55,  2,  0),
63 	RATETAB_ENT(110, 3,  0),
64 	RATETAB_ENT(60,  9,  0),
65 	RATETAB_ENT(90,  6,  0),
66 	RATETAB_ENT(120, 7,  0),
67 	RATETAB_ENT(180, 8,  0),
68 	RATETAB_ENT(240, 9,  0),
69 	RATETAB_ENT(360, 10, 0),
70 	RATETAB_ENT(480, 11, 0),
71 	RATETAB_ENT(540, 12, 0),
72 };
73 
74 static struct ieee80211_supported_band lbs_band_2ghz = {
75 	.channels = lbs_2ghz_channels,
76 	.n_channels = ARRAY_SIZE(lbs_2ghz_channels),
77 	.bitrates = lbs_rates,
78 	.n_bitrates = ARRAY_SIZE(lbs_rates),
79 };
80 
81 
82 static const u32 cipher_suites[] = {
83 	WLAN_CIPHER_SUITE_WEP40,
84 	WLAN_CIPHER_SUITE_WEP104,
85 	WLAN_CIPHER_SUITE_TKIP,
86 	WLAN_CIPHER_SUITE_CCMP,
87 };
88 
89 /* Time to stay on the channel */
90 #define LBS_DWELL_PASSIVE 100
91 #define LBS_DWELL_ACTIVE  40
92 
93 
94 /***************************************************************************
95  * Misc utility functions
96  *
97  * TLVs are Marvell specific. They are very similar to IEs, they have the
98  * same structure: type, length, data*. The only difference: for IEs, the
99  * type and length are u8, but for TLVs they're __le16.
100  */
101 
102 /*
103  * Convert NL80211's auth_type to the one from Libertas, see chapter 5.9.1
104  * in the firmware spec
105  */
106 static int lbs_auth_to_authtype(enum nl80211_auth_type auth_type)
107 {
108 	int ret = -ENOTSUPP;
109 
110 	switch (auth_type) {
111 	case NL80211_AUTHTYPE_OPEN_SYSTEM:
112 	case NL80211_AUTHTYPE_SHARED_KEY:
113 		ret = auth_type;
114 		break;
115 	case NL80211_AUTHTYPE_AUTOMATIC:
116 		ret = NL80211_AUTHTYPE_OPEN_SYSTEM;
117 		break;
118 	case NL80211_AUTHTYPE_NETWORK_EAP:
119 		ret = 0x80;
120 		break;
121 	default:
122 		/* silence compiler */
123 		break;
124 	}
125 	return ret;
126 }
127 
128 
129 /*
130  * Various firmware commands need the list of supported rates, but with
131  * the hight-bit set for basic rates
132  */
133 static int lbs_add_rates(u8 *rates)
134 {
135 	size_t i;
136 
137 	for (i = 0; i < ARRAY_SIZE(lbs_rates); i++) {
138 		u8 rate = lbs_rates[i].bitrate / 5;
139 		if (rate == 0x02 || rate == 0x04 ||
140 		    rate == 0x0b || rate == 0x16)
141 			rate |= 0x80;
142 		rates[i] = rate;
143 	}
144 	return ARRAY_SIZE(lbs_rates);
145 }
146 
147 
148 /***************************************************************************
149  * TLV utility functions
150  *
151  * TLVs are Marvell specific. They are very similar to IEs, they have the
152  * same structure: type, length, data*. The only difference: for IEs, the
153  * type and length are u8, but for TLVs they're __le16.
154  */
155 
156 
157 /*
158  * Add ssid TLV
159  */
160 #define LBS_MAX_SSID_TLV_SIZE			\
161 	(sizeof(struct mrvl_ie_header)		\
162 	 + IEEE80211_MAX_SSID_LEN)
163 
164 static int lbs_add_ssid_tlv(u8 *tlv, const u8 *ssid, int ssid_len)
165 {
166 	struct mrvl_ie_ssid_param_set *ssid_tlv = (void *)tlv;
167 
168 	/*
169 	 * TLV-ID SSID  00 00
170 	 * length       06 00
171 	 * ssid         4d 4e 54 45 53 54
172 	 */
173 	ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
174 	ssid_tlv->header.len = cpu_to_le16(ssid_len);
175 	memcpy(ssid_tlv->ssid, ssid, ssid_len);
176 	return sizeof(ssid_tlv->header) + ssid_len;
177 }
178 
179 
180 /*
181  * Add channel list TLV (section 8.4.2)
182  *
183  * Actual channel data comes from priv->wdev->wiphy->channels.
184  */
185 #define LBS_MAX_CHANNEL_LIST_TLV_SIZE					\
186 	(sizeof(struct mrvl_ie_header)					\
187 	 + (LBS_SCAN_BEFORE_NAP * sizeof(struct chanscanparamset)))
188 
189 static int lbs_add_channel_list_tlv(struct lbs_private *priv, u8 *tlv,
190 				    int last_channel, int active_scan)
191 {
192 	int chanscanparamsize = sizeof(struct chanscanparamset) *
193 		(last_channel - priv->scan_channel);
194 
195 	struct mrvl_ie_header *header = (void *) tlv;
196 
197 	/*
198 	 * TLV-ID CHANLIST  01 01
199 	 * length           0e 00
200 	 * channel          00 01 00 00 00 64 00
201 	 *   radio type     00
202 	 *   channel           01
203 	 *   scan type            00
204 	 *   min scan time           00 00
205 	 *   max scan time                 64 00
206 	 * channel 2        00 02 00 00 00 64 00
207 	 *
208 	 */
209 
210 	header->type = cpu_to_le16(TLV_TYPE_CHANLIST);
211 	header->len  = cpu_to_le16(chanscanparamsize);
212 	tlv += sizeof(struct mrvl_ie_header);
213 
214 	/* lbs_deb_scan("scan: channels %d to %d\n", priv->scan_channel,
215 		     last_channel); */
216 	memset(tlv, 0, chanscanparamsize);
217 
218 	while (priv->scan_channel < last_channel) {
219 		struct chanscanparamset *param = (void *) tlv;
220 
221 		param->radiotype = CMD_SCAN_RADIO_TYPE_BG;
222 		param->channumber =
223 			priv->scan_req->channels[priv->scan_channel]->hw_value;
224 		if (active_scan) {
225 			param->maxscantime = cpu_to_le16(LBS_DWELL_ACTIVE);
226 		} else {
227 			param->chanscanmode.passivescan = 1;
228 			param->maxscantime = cpu_to_le16(LBS_DWELL_PASSIVE);
229 		}
230 		tlv += sizeof(struct chanscanparamset);
231 		priv->scan_channel++;
232 	}
233 	return sizeof(struct mrvl_ie_header) + chanscanparamsize;
234 }
235 
236 
237 /*
238  * Add rates TLV
239  *
240  * The rates are in lbs_bg_rates[], but for the 802.11b
241  * rates the high bit is set. We add this TLV only because
242  * there's a firmware which otherwise doesn't report all
243  * APs in range.
244  */
245 #define LBS_MAX_RATES_TLV_SIZE			\
246 	(sizeof(struct mrvl_ie_header)		\
247 	 + (ARRAY_SIZE(lbs_rates)))
248 
249 /* Adds a TLV with all rates the hardware supports */
250 static int lbs_add_supported_rates_tlv(u8 *tlv)
251 {
252 	size_t i;
253 	struct mrvl_ie_rates_param_set *rate_tlv = (void *)tlv;
254 
255 	/*
256 	 * TLV-ID RATES  01 00
257 	 * length        0e 00
258 	 * rates         82 84 8b 96 0c 12 18 24 30 48 60 6c
259 	 */
260 	rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES);
261 	tlv += sizeof(rate_tlv->header);
262 	i = lbs_add_rates(tlv);
263 	tlv += i;
264 	rate_tlv->header.len = cpu_to_le16(i);
265 	return sizeof(rate_tlv->header) + i;
266 }
267 
268 /* Add common rates from a TLV and return the new end of the TLV */
269 static u8 *
270 add_ie_rates(u8 *tlv, const u8 *ie, int *nrates)
271 {
272 	int hw, ap, ap_max = ie[1];
273 	u8 hw_rate;
274 
275 	/* Advance past IE header */
276 	ie += 2;
277 
278 	lbs_deb_hex(LBS_DEB_ASSOC, "AP IE Rates", (u8 *) ie, ap_max);
279 
280 	for (hw = 0; hw < ARRAY_SIZE(lbs_rates); hw++) {
281 		hw_rate = lbs_rates[hw].bitrate / 5;
282 		for (ap = 0; ap < ap_max; ap++) {
283 			if (hw_rate == (ie[ap] & 0x7f)) {
284 				*tlv++ = ie[ap];
285 				*nrates = *nrates + 1;
286 			}
287 		}
288 	}
289 	return tlv;
290 }
291 
292 /*
293  * Adds a TLV with all rates the hardware *and* BSS supports.
294  */
295 static int lbs_add_common_rates_tlv(u8 *tlv, struct cfg80211_bss *bss)
296 {
297 	struct mrvl_ie_rates_param_set *rate_tlv = (void *)tlv;
298 	const u8 *rates_eid, *ext_rates_eid;
299 	int n = 0;
300 
301 	rcu_read_lock();
302 	rates_eid = ieee80211_bss_get_ie(bss, WLAN_EID_SUPP_RATES);
303 	ext_rates_eid = ieee80211_bss_get_ie(bss, WLAN_EID_EXT_SUPP_RATES);
304 
305 	/*
306 	 * 01 00                   TLV_TYPE_RATES
307 	 * 04 00                   len
308 	 * 82 84 8b 96             rates
309 	 */
310 	rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES);
311 	tlv += sizeof(rate_tlv->header);
312 
313 	/* Add basic rates */
314 	if (rates_eid) {
315 		tlv = add_ie_rates(tlv, rates_eid, &n);
316 
317 		/* Add extended rates, if any */
318 		if (ext_rates_eid)
319 			tlv = add_ie_rates(tlv, ext_rates_eid, &n);
320 	} else {
321 		lbs_deb_assoc("assoc: bss had no basic rate IE\n");
322 		/* Fallback: add basic 802.11b rates */
323 		*tlv++ = 0x82;
324 		*tlv++ = 0x84;
325 		*tlv++ = 0x8b;
326 		*tlv++ = 0x96;
327 		n = 4;
328 	}
329 	rcu_read_unlock();
330 
331 	rate_tlv->header.len = cpu_to_le16(n);
332 	return sizeof(rate_tlv->header) + n;
333 }
334 
335 
336 /*
337  * Add auth type TLV.
338  *
339  * This is only needed for newer firmware (V9 and up).
340  */
341 #define LBS_MAX_AUTH_TYPE_TLV_SIZE \
342 	sizeof(struct mrvl_ie_auth_type)
343 
344 static int lbs_add_auth_type_tlv(u8 *tlv, enum nl80211_auth_type auth_type)
345 {
346 	struct mrvl_ie_auth_type *auth = (void *) tlv;
347 
348 	/*
349 	 * 1f 01  TLV_TYPE_AUTH_TYPE
350 	 * 01 00  len
351 	 * 01     auth type
352 	 */
353 	auth->header.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE);
354 	auth->header.len = cpu_to_le16(sizeof(*auth)-sizeof(auth->header));
355 	auth->auth = cpu_to_le16(lbs_auth_to_authtype(auth_type));
356 	return sizeof(*auth);
357 }
358 
359 
360 /*
361  * Add channel (phy ds) TLV
362  */
363 #define LBS_MAX_CHANNEL_TLV_SIZE \
364 	sizeof(struct mrvl_ie_header)
365 
366 static int lbs_add_channel_tlv(u8 *tlv, u8 channel)
367 {
368 	struct mrvl_ie_ds_param_set *ds = (void *) tlv;
369 
370 	/*
371 	 * 03 00  TLV_TYPE_PHY_DS
372 	 * 01 00  len
373 	 * 06     channel
374 	 */
375 	ds->header.type = cpu_to_le16(TLV_TYPE_PHY_DS);
376 	ds->header.len = cpu_to_le16(sizeof(*ds)-sizeof(ds->header));
377 	ds->channel = channel;
378 	return sizeof(*ds);
379 }
380 
381 
382 /*
383  * Add (empty) CF param TLV of the form:
384  */
385 #define LBS_MAX_CF_PARAM_TLV_SIZE		\
386 	sizeof(struct mrvl_ie_header)
387 
388 static int lbs_add_cf_param_tlv(u8 *tlv)
389 {
390 	struct mrvl_ie_cf_param_set *cf = (void *)tlv;
391 
392 	/*
393 	 * 04 00  TLV_TYPE_CF
394 	 * 06 00  len
395 	 * 00     cfpcnt
396 	 * 00     cfpperiod
397 	 * 00 00  cfpmaxduration
398 	 * 00 00  cfpdurationremaining
399 	 */
400 	cf->header.type = cpu_to_le16(TLV_TYPE_CF);
401 	cf->header.len = cpu_to_le16(sizeof(*cf)-sizeof(cf->header));
402 	return sizeof(*cf);
403 }
404 
405 /*
406  * Add WPA TLV
407  */
408 #define LBS_MAX_WPA_TLV_SIZE			\
409 	(sizeof(struct mrvl_ie_header)		\
410 	 + 128 /* TODO: I guessed the size */)
411 
412 static int lbs_add_wpa_tlv(u8 *tlv, const u8 *ie, u8 ie_len)
413 {
414 	size_t tlv_len;
415 
416 	/*
417 	 * We need just convert an IE to an TLV. IEs use u8 for the header,
418 	 *   u8      type
419 	 *   u8      len
420 	 *   u8[]    data
421 	 * but TLVs use __le16 instead:
422 	 *   __le16  type
423 	 *   __le16  len
424 	 *   u8[]    data
425 	 */
426 	*tlv++ = *ie++;
427 	*tlv++ = 0;
428 	tlv_len = *tlv++ = *ie++;
429 	*tlv++ = 0;
430 	while (tlv_len--)
431 		*tlv++ = *ie++;
432 	/* the TLV is two bytes larger than the IE */
433 	return ie_len + 2;
434 }
435 
436 /*
437  * Set Channel
438  */
439 
440 static int lbs_cfg_set_monitor_channel(struct wiphy *wiphy,
441 				       struct cfg80211_chan_def *chandef)
442 {
443 	struct lbs_private *priv = wiphy_priv(wiphy);
444 	int ret = -ENOTSUPP;
445 
446 	lbs_deb_enter_args(LBS_DEB_CFG80211, "freq %d, type %d",
447 			   chandef->chan->center_freq,
448 			   cfg80211_get_chandef_type(chandef));
449 
450 	if (cfg80211_get_chandef_type(chandef) != NL80211_CHAN_NO_HT)
451 		goto out;
452 
453 	ret = lbs_set_channel(priv, chandef->chan->hw_value);
454 
455  out:
456 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
457 	return ret;
458 }
459 
460 static int lbs_cfg_set_mesh_channel(struct wiphy *wiphy,
461 				    struct net_device *netdev,
462 				    struct ieee80211_channel *channel)
463 {
464 	struct lbs_private *priv = wiphy_priv(wiphy);
465 	int ret = -ENOTSUPP;
466 
467 	lbs_deb_enter_args(LBS_DEB_CFG80211, "iface %s freq %d",
468 			   netdev_name(netdev), channel->center_freq);
469 
470 	if (netdev != priv->mesh_dev)
471 		goto out;
472 
473 	ret = lbs_mesh_set_channel(priv, channel->hw_value);
474 
475  out:
476 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
477 	return ret;
478 }
479 
480 
481 
482 /*
483  * Scanning
484  */
485 
486 /*
487  * When scanning, the firmware doesn't send a nul packet with the power-safe
488  * bit to the AP. So we cannot stay away from our current channel too long,
489  * otherwise we loose data. So take a "nap" while scanning every other
490  * while.
491  */
492 #define LBS_SCAN_BEFORE_NAP 4
493 
494 
495 /*
496  * When the firmware reports back a scan-result, it gives us an "u8 rssi",
497  * which isn't really an RSSI, as it becomes larger when moving away from
498  * the AP. Anyway, we need to convert that into mBm.
499  */
500 #define LBS_SCAN_RSSI_TO_MBM(rssi) \
501 	((-(int)rssi + 3)*100)
502 
503 static int lbs_ret_scan(struct lbs_private *priv, unsigned long dummy,
504 	struct cmd_header *resp)
505 {
506 	struct cfg80211_bss *bss;
507 	struct cmd_ds_802_11_scan_rsp *scanresp = (void *)resp;
508 	int bsssize;
509 	const u8 *pos;
510 	const u8 *tsfdesc;
511 	int tsfsize;
512 	int i;
513 	int ret = -EILSEQ;
514 
515 	lbs_deb_enter(LBS_DEB_CFG80211);
516 
517 	bsssize = get_unaligned_le16(&scanresp->bssdescriptsize);
518 
519 	lbs_deb_scan("scan response: %d BSSs (%d bytes); resp size %d bytes\n",
520 			scanresp->nr_sets, bsssize, le16_to_cpu(resp->size));
521 
522 	if (scanresp->nr_sets == 0) {
523 		ret = 0;
524 		goto done;
525 	}
526 
527 	/*
528 	 * The general layout of the scan response is described in chapter
529 	 * 5.7.1. Basically we have a common part, then any number of BSS
530 	 * descriptor sections. Finally we have section with the same number
531 	 * of TSFs.
532 	 *
533 	 * cmd_ds_802_11_scan_rsp
534 	 *   cmd_header
535 	 *   pos_size
536 	 *   nr_sets
537 	 *   bssdesc 1
538 	 *     bssid
539 	 *     rssi
540 	 *     timestamp
541 	 *     intvl
542 	 *     capa
543 	 *     IEs
544 	 *   bssdesc 2
545 	 *   bssdesc n
546 	 *   MrvlIEtypes_TsfFimestamp_t
547 	 *     TSF for BSS 1
548 	 *     TSF for BSS 2
549 	 *     TSF for BSS n
550 	 */
551 
552 	pos = scanresp->bssdesc_and_tlvbuffer;
553 
554 	lbs_deb_hex(LBS_DEB_SCAN, "SCAN_RSP", scanresp->bssdesc_and_tlvbuffer,
555 			scanresp->bssdescriptsize);
556 
557 	tsfdesc = pos + bsssize;
558 	tsfsize = 4 + 8 * scanresp->nr_sets;
559 	lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TSF", (u8 *) tsfdesc, tsfsize);
560 
561 	/* Validity check: we expect a Marvell-Local TLV */
562 	i = get_unaligned_le16(tsfdesc);
563 	tsfdesc += 2;
564 	if (i != TLV_TYPE_TSFTIMESTAMP) {
565 		lbs_deb_scan("scan response: invalid TSF Timestamp %d\n", i);
566 		goto done;
567 	}
568 
569 	/*
570 	 * Validity check: the TLV holds TSF values with 8 bytes each, so
571 	 * the size in the TLV must match the nr_sets value
572 	 */
573 	i = get_unaligned_le16(tsfdesc);
574 	tsfdesc += 2;
575 	if (i / 8 != scanresp->nr_sets) {
576 		lbs_deb_scan("scan response: invalid number of TSF timestamp "
577 			     "sets (expected %d got %d)\n", scanresp->nr_sets,
578 			     i / 8);
579 		goto done;
580 	}
581 
582 	for (i = 0; i < scanresp->nr_sets; i++) {
583 		const u8 *bssid;
584 		const u8 *ie;
585 		int left;
586 		int ielen;
587 		int rssi;
588 		u16 intvl;
589 		u16 capa;
590 		int chan_no = -1;
591 		const u8 *ssid = NULL;
592 		u8 ssid_len = 0;
593 
594 		int len = get_unaligned_le16(pos);
595 		pos += 2;
596 
597 		/* BSSID */
598 		bssid = pos;
599 		pos += ETH_ALEN;
600 		/* RSSI */
601 		rssi = *pos++;
602 		/* Packet time stamp */
603 		pos += 8;
604 		/* Beacon interval */
605 		intvl = get_unaligned_le16(pos);
606 		pos += 2;
607 		/* Capabilities */
608 		capa = get_unaligned_le16(pos);
609 		pos += 2;
610 
611 		/* To find out the channel, we must parse the IEs */
612 		ie = pos;
613 		/*
614 		 * 6+1+8+2+2: size of BSSID, RSSI, time stamp, beacon
615 		 * interval, capabilities
616 		 */
617 		ielen = left = len - (6 + 1 + 8 + 2 + 2);
618 		while (left >= 2) {
619 			u8 id, elen;
620 			id = *pos++;
621 			elen = *pos++;
622 			left -= 2;
623 			if (elen > left) {
624 				lbs_deb_scan("scan response: invalid IE fmt\n");
625 				goto done;
626 			}
627 
628 			if (id == WLAN_EID_DS_PARAMS)
629 				chan_no = *pos;
630 			if (id == WLAN_EID_SSID) {
631 				ssid = pos;
632 				ssid_len = elen;
633 			}
634 			left -= elen;
635 			pos += elen;
636 		}
637 
638 		/* No channel, no luck */
639 		if (chan_no != -1) {
640 			struct wiphy *wiphy = priv->wdev->wiphy;
641 			int freq = ieee80211_channel_to_frequency(chan_no,
642 							IEEE80211_BAND_2GHZ);
643 			struct ieee80211_channel *channel =
644 				ieee80211_get_channel(wiphy, freq);
645 
646 			lbs_deb_scan("scan: %pM, capa %04x, chan %2d, %*pE, %d dBm\n",
647 				     bssid, capa, chan_no, ssid_len, ssid,
648 				     LBS_SCAN_RSSI_TO_MBM(rssi)/100);
649 
650 			if (channel &&
651 			    !(channel->flags & IEEE80211_CHAN_DISABLED)) {
652 				bss = cfg80211_inform_bss(wiphy, channel,
653 					CFG80211_BSS_FTYPE_UNKNOWN,
654 					bssid, get_unaligned_le64(tsfdesc),
655 					capa, intvl, ie, ielen,
656 					LBS_SCAN_RSSI_TO_MBM(rssi),
657 					GFP_KERNEL);
658 				cfg80211_put_bss(wiphy, bss);
659 			}
660 		} else
661 			lbs_deb_scan("scan response: missing BSS channel IE\n");
662 
663 		tsfdesc += 8;
664 	}
665 	ret = 0;
666 
667  done:
668 	lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
669 	return ret;
670 }
671 
672 
673 /*
674  * Our scan command contains a TLV, consting of a SSID TLV, a channel list
675  * TLV and a rates TLV. Determine the maximum size of them:
676  */
677 #define LBS_SCAN_MAX_CMD_SIZE			\
678 	(sizeof(struct cmd_ds_802_11_scan)	\
679 	 + LBS_MAX_SSID_TLV_SIZE		\
680 	 + LBS_MAX_CHANNEL_LIST_TLV_SIZE	\
681 	 + LBS_MAX_RATES_TLV_SIZE)
682 
683 /*
684  * Assumes priv->scan_req is initialized and valid
685  * Assumes priv->scan_channel is initialized
686  */
687 static void lbs_scan_worker(struct work_struct *work)
688 {
689 	struct lbs_private *priv =
690 		container_of(work, struct lbs_private, scan_work.work);
691 	struct cmd_ds_802_11_scan *scan_cmd;
692 	u8 *tlv; /* pointer into our current, growing TLV storage area */
693 	int last_channel;
694 	int running, carrier;
695 
696 	lbs_deb_enter(LBS_DEB_SCAN);
697 
698 	scan_cmd = kzalloc(LBS_SCAN_MAX_CMD_SIZE, GFP_KERNEL);
699 	if (scan_cmd == NULL)
700 		goto out_no_scan_cmd;
701 
702 	/* prepare fixed part of scan command */
703 	scan_cmd->bsstype = CMD_BSS_TYPE_ANY;
704 
705 	/* stop network while we're away from our main channel */
706 	running = !netif_queue_stopped(priv->dev);
707 	carrier = netif_carrier_ok(priv->dev);
708 	if (running)
709 		netif_stop_queue(priv->dev);
710 	if (carrier)
711 		netif_carrier_off(priv->dev);
712 
713 	/* prepare fixed part of scan command */
714 	tlv = scan_cmd->tlvbuffer;
715 
716 	/* add SSID TLV */
717 	if (priv->scan_req->n_ssids && priv->scan_req->ssids[0].ssid_len > 0)
718 		tlv += lbs_add_ssid_tlv(tlv,
719 					priv->scan_req->ssids[0].ssid,
720 					priv->scan_req->ssids[0].ssid_len);
721 
722 	/* add channel TLVs */
723 	last_channel = priv->scan_channel + LBS_SCAN_BEFORE_NAP;
724 	if (last_channel > priv->scan_req->n_channels)
725 		last_channel = priv->scan_req->n_channels;
726 	tlv += lbs_add_channel_list_tlv(priv, tlv, last_channel,
727 		priv->scan_req->n_ssids);
728 
729 	/* add rates TLV */
730 	tlv += lbs_add_supported_rates_tlv(tlv);
731 
732 	if (priv->scan_channel < priv->scan_req->n_channels) {
733 		cancel_delayed_work(&priv->scan_work);
734 		if (netif_running(priv->dev))
735 			queue_delayed_work(priv->work_thread, &priv->scan_work,
736 				msecs_to_jiffies(300));
737 	}
738 
739 	/* This is the final data we are about to send */
740 	scan_cmd->hdr.size = cpu_to_le16(tlv - (u8 *)scan_cmd);
741 	lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd,
742 		    sizeof(*scan_cmd));
743 	lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer,
744 		    tlv - scan_cmd->tlvbuffer);
745 
746 	__lbs_cmd(priv, CMD_802_11_SCAN, &scan_cmd->hdr,
747 		le16_to_cpu(scan_cmd->hdr.size),
748 		lbs_ret_scan, 0);
749 
750 	if (priv->scan_channel >= priv->scan_req->n_channels) {
751 		/* Mark scan done */
752 		cancel_delayed_work(&priv->scan_work);
753 		lbs_scan_done(priv);
754 	}
755 
756 	/* Restart network */
757 	if (carrier)
758 		netif_carrier_on(priv->dev);
759 	if (running && !priv->tx_pending_len)
760 		netif_wake_queue(priv->dev);
761 
762 	kfree(scan_cmd);
763 
764 	/* Wake up anything waiting on scan completion */
765 	if (priv->scan_req == NULL) {
766 		lbs_deb_scan("scan: waking up waiters\n");
767 		wake_up_all(&priv->scan_q);
768 	}
769 
770  out_no_scan_cmd:
771 	lbs_deb_leave(LBS_DEB_SCAN);
772 }
773 
774 static void _internal_start_scan(struct lbs_private *priv, bool internal,
775 	struct cfg80211_scan_request *request)
776 {
777 	lbs_deb_enter(LBS_DEB_CFG80211);
778 
779 	lbs_deb_scan("scan: ssids %d, channels %d, ie_len %zd\n",
780 		request->n_ssids, request->n_channels, request->ie_len);
781 
782 	priv->scan_channel = 0;
783 	priv->scan_req = request;
784 	priv->internal_scan = internal;
785 
786 	queue_delayed_work(priv->work_thread, &priv->scan_work,
787 		msecs_to_jiffies(50));
788 
789 	lbs_deb_leave(LBS_DEB_CFG80211);
790 }
791 
792 /*
793  * Clean up priv->scan_req.  Should be used to handle the allocation details.
794  */
795 void lbs_scan_done(struct lbs_private *priv)
796 {
797 	WARN_ON(!priv->scan_req);
798 
799 	if (priv->internal_scan)
800 		kfree(priv->scan_req);
801 	else
802 		cfg80211_scan_done(priv->scan_req, false);
803 
804 	priv->scan_req = NULL;
805 }
806 
807 static int lbs_cfg_scan(struct wiphy *wiphy,
808 	struct cfg80211_scan_request *request)
809 {
810 	struct lbs_private *priv = wiphy_priv(wiphy);
811 	int ret = 0;
812 
813 	lbs_deb_enter(LBS_DEB_CFG80211);
814 
815 	if (priv->scan_req || delayed_work_pending(&priv->scan_work)) {
816 		/* old scan request not yet processed */
817 		ret = -EAGAIN;
818 		goto out;
819 	}
820 
821 	_internal_start_scan(priv, false, request);
822 
823 	if (priv->surpriseremoved)
824 		ret = -EIO;
825 
826  out:
827 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
828 	return ret;
829 }
830 
831 
832 
833 
834 /*
835  * Events
836  */
837 
838 void lbs_send_disconnect_notification(struct lbs_private *priv,
839 				      bool locally_generated)
840 {
841 	lbs_deb_enter(LBS_DEB_CFG80211);
842 
843 	cfg80211_disconnected(priv->dev, 0, NULL, 0, locally_generated,
844 			      GFP_KERNEL);
845 
846 	lbs_deb_leave(LBS_DEB_CFG80211);
847 }
848 
849 void lbs_send_mic_failureevent(struct lbs_private *priv, u32 event)
850 {
851 	lbs_deb_enter(LBS_DEB_CFG80211);
852 
853 	cfg80211_michael_mic_failure(priv->dev,
854 		priv->assoc_bss,
855 		event == MACREG_INT_CODE_MIC_ERR_MULTICAST ?
856 			NL80211_KEYTYPE_GROUP :
857 			NL80211_KEYTYPE_PAIRWISE,
858 		-1,
859 		NULL,
860 		GFP_KERNEL);
861 
862 	lbs_deb_leave(LBS_DEB_CFG80211);
863 }
864 
865 
866 
867 
868 /*
869  * Connect/disconnect
870  */
871 
872 
873 /*
874  * This removes all WEP keys
875  */
876 static int lbs_remove_wep_keys(struct lbs_private *priv)
877 {
878 	struct cmd_ds_802_11_set_wep cmd;
879 	int ret;
880 
881 	lbs_deb_enter(LBS_DEB_CFG80211);
882 
883 	memset(&cmd, 0, sizeof(cmd));
884 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
885 	cmd.keyindex = cpu_to_le16(priv->wep_tx_key);
886 	cmd.action = cpu_to_le16(CMD_ACT_REMOVE);
887 
888 	ret = lbs_cmd_with_response(priv, CMD_802_11_SET_WEP, &cmd);
889 
890 	lbs_deb_leave(LBS_DEB_CFG80211);
891 	return ret;
892 }
893 
894 /*
895  * Set WEP keys
896  */
897 static int lbs_set_wep_keys(struct lbs_private *priv)
898 {
899 	struct cmd_ds_802_11_set_wep cmd;
900 	int i;
901 	int ret;
902 
903 	lbs_deb_enter(LBS_DEB_CFG80211);
904 
905 	/*
906 	 * command         13 00
907 	 * size            50 00
908 	 * sequence        xx xx
909 	 * result          00 00
910 	 * action          02 00     ACT_ADD
911 	 * transmit key    00 00
912 	 * type for key 1  01        WEP40
913 	 * type for key 2  00
914 	 * type for key 3  00
915 	 * type for key 4  00
916 	 * key 1           39 39 39 39 39 00 00 00
917 	 *                 00 00 00 00 00 00 00 00
918 	 * key 2           00 00 00 00 00 00 00 00
919 	 *                 00 00 00 00 00 00 00 00
920 	 * key 3           00 00 00 00 00 00 00 00
921 	 *                 00 00 00 00 00 00 00 00
922 	 * key 4           00 00 00 00 00 00 00 00
923 	 */
924 	if (priv->wep_key_len[0] || priv->wep_key_len[1] ||
925 	    priv->wep_key_len[2] || priv->wep_key_len[3]) {
926 		/* Only set wep keys if we have at least one of them */
927 		memset(&cmd, 0, sizeof(cmd));
928 		cmd.hdr.size = cpu_to_le16(sizeof(cmd));
929 		cmd.keyindex = cpu_to_le16(priv->wep_tx_key);
930 		cmd.action = cpu_to_le16(CMD_ACT_ADD);
931 
932 		for (i = 0; i < 4; i++) {
933 			switch (priv->wep_key_len[i]) {
934 			case WLAN_KEY_LEN_WEP40:
935 				cmd.keytype[i] = CMD_TYPE_WEP_40_BIT;
936 				break;
937 			case WLAN_KEY_LEN_WEP104:
938 				cmd.keytype[i] = CMD_TYPE_WEP_104_BIT;
939 				break;
940 			default:
941 				cmd.keytype[i] = 0;
942 				break;
943 			}
944 			memcpy(cmd.keymaterial[i], priv->wep_key[i],
945 			       priv->wep_key_len[i]);
946 		}
947 
948 		ret = lbs_cmd_with_response(priv, CMD_802_11_SET_WEP, &cmd);
949 	} else {
950 		/* Otherwise remove all wep keys */
951 		ret = lbs_remove_wep_keys(priv);
952 	}
953 
954 	lbs_deb_leave(LBS_DEB_CFG80211);
955 	return ret;
956 }
957 
958 
959 /*
960  * Enable/Disable RSN status
961  */
962 static int lbs_enable_rsn(struct lbs_private *priv, int enable)
963 {
964 	struct cmd_ds_802_11_enable_rsn cmd;
965 	int ret;
966 
967 	lbs_deb_enter_args(LBS_DEB_CFG80211, "%d", enable);
968 
969 	/*
970 	 * cmd       2f 00
971 	 * size      0c 00
972 	 * sequence  xx xx
973 	 * result    00 00
974 	 * action    01 00    ACT_SET
975 	 * enable    01 00
976 	 */
977 	memset(&cmd, 0, sizeof(cmd));
978 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
979 	cmd.action = cpu_to_le16(CMD_ACT_SET);
980 	cmd.enable = cpu_to_le16(enable);
981 
982 	ret = lbs_cmd_with_response(priv, CMD_802_11_ENABLE_RSN, &cmd);
983 
984 	lbs_deb_leave(LBS_DEB_CFG80211);
985 	return ret;
986 }
987 
988 
989 /*
990  * Set WPA/WPA key material
991  */
992 
993 /*
994  * like "struct cmd_ds_802_11_key_material", but with cmd_header. Once we
995  * get rid of WEXT, this should go into host.h
996  */
997 
998 struct cmd_key_material {
999 	struct cmd_header hdr;
1000 
1001 	__le16 action;
1002 	struct MrvlIEtype_keyParamSet param;
1003 } __packed;
1004 
1005 static int lbs_set_key_material(struct lbs_private *priv,
1006 				int key_type, int key_info,
1007 				const u8 *key, u16 key_len)
1008 {
1009 	struct cmd_key_material cmd;
1010 	int ret;
1011 
1012 	lbs_deb_enter(LBS_DEB_CFG80211);
1013 
1014 	/*
1015 	 * Example for WPA (TKIP):
1016 	 *
1017 	 * cmd       5e 00
1018 	 * size      34 00
1019 	 * sequence  xx xx
1020 	 * result    00 00
1021 	 * action    01 00
1022 	 * TLV type  00 01    key param
1023 	 * length    00 26
1024 	 * key type  01 00    TKIP
1025 	 * key info  06 00    UNICAST | ENABLED
1026 	 * key len   20 00
1027 	 * key       32 bytes
1028 	 */
1029 	memset(&cmd, 0, sizeof(cmd));
1030 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1031 	cmd.action = cpu_to_le16(CMD_ACT_SET);
1032 	cmd.param.type = cpu_to_le16(TLV_TYPE_KEY_MATERIAL);
1033 	cmd.param.length = cpu_to_le16(sizeof(cmd.param) - 4);
1034 	cmd.param.keytypeid = cpu_to_le16(key_type);
1035 	cmd.param.keyinfo = cpu_to_le16(key_info);
1036 	cmd.param.keylen = cpu_to_le16(key_len);
1037 	if (key && key_len)
1038 		memcpy(cmd.param.key, key, key_len);
1039 
1040 	ret = lbs_cmd_with_response(priv, CMD_802_11_KEY_MATERIAL, &cmd);
1041 
1042 	lbs_deb_leave(LBS_DEB_CFG80211);
1043 	return ret;
1044 }
1045 
1046 
1047 /*
1048  * Sets the auth type (open, shared, etc) in the firmware. That
1049  * we use CMD_802_11_AUTHENTICATE is misleading, this firmware
1050  * command doesn't send an authentication frame at all, it just
1051  * stores the auth_type.
1052  */
1053 static int lbs_set_authtype(struct lbs_private *priv,
1054 			    struct cfg80211_connect_params *sme)
1055 {
1056 	struct cmd_ds_802_11_authenticate cmd;
1057 	int ret;
1058 
1059 	lbs_deb_enter_args(LBS_DEB_CFG80211, "%d", sme->auth_type);
1060 
1061 	/*
1062 	 * cmd        11 00
1063 	 * size       19 00
1064 	 * sequence   xx xx
1065 	 * result     00 00
1066 	 * BSS id     00 13 19 80 da 30
1067 	 * auth type  00
1068 	 * reserved   00 00 00 00 00 00 00 00 00 00
1069 	 */
1070 	memset(&cmd, 0, sizeof(cmd));
1071 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1072 	if (sme->bssid)
1073 		memcpy(cmd.bssid, sme->bssid, ETH_ALEN);
1074 	/* convert auth_type */
1075 	ret = lbs_auth_to_authtype(sme->auth_type);
1076 	if (ret < 0)
1077 		goto done;
1078 
1079 	cmd.authtype = ret;
1080 	ret = lbs_cmd_with_response(priv, CMD_802_11_AUTHENTICATE, &cmd);
1081 
1082  done:
1083 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
1084 	return ret;
1085 }
1086 
1087 
1088 /*
1089  * Create association request
1090  */
1091 #define LBS_ASSOC_MAX_CMD_SIZE                     \
1092 	(sizeof(struct cmd_ds_802_11_associate)    \
1093 	 - 512 /* cmd_ds_802_11_associate.iebuf */ \
1094 	 + LBS_MAX_SSID_TLV_SIZE                   \
1095 	 + LBS_MAX_CHANNEL_TLV_SIZE                \
1096 	 + LBS_MAX_CF_PARAM_TLV_SIZE               \
1097 	 + LBS_MAX_AUTH_TYPE_TLV_SIZE              \
1098 	 + LBS_MAX_WPA_TLV_SIZE)
1099 
1100 static int lbs_associate(struct lbs_private *priv,
1101 		struct cfg80211_bss *bss,
1102 		struct cfg80211_connect_params *sme)
1103 {
1104 	struct cmd_ds_802_11_associate_response *resp;
1105 	struct cmd_ds_802_11_associate *cmd = kzalloc(LBS_ASSOC_MAX_CMD_SIZE,
1106 						      GFP_KERNEL);
1107 	const u8 *ssid_eid;
1108 	size_t len, resp_ie_len;
1109 	int status;
1110 	int ret;
1111 	u8 *pos;
1112 	u8 *tmp;
1113 
1114 	lbs_deb_enter(LBS_DEB_CFG80211);
1115 
1116 	if (!cmd) {
1117 		ret = -ENOMEM;
1118 		goto done;
1119 	}
1120 	pos = &cmd->iebuf[0];
1121 
1122 	/*
1123 	 * cmd              50 00
1124 	 * length           34 00
1125 	 * sequence         xx xx
1126 	 * result           00 00
1127 	 * BSS id           00 13 19 80 da 30
1128 	 * capabilities     11 00
1129 	 * listen interval  0a 00
1130 	 * beacon interval  00 00
1131 	 * DTIM period      00
1132 	 * TLVs             xx   (up to 512 bytes)
1133 	 */
1134 	cmd->hdr.command = cpu_to_le16(CMD_802_11_ASSOCIATE);
1135 
1136 	/* Fill in static fields */
1137 	memcpy(cmd->bssid, bss->bssid, ETH_ALEN);
1138 	cmd->listeninterval = cpu_to_le16(MRVDRV_DEFAULT_LISTEN_INTERVAL);
1139 	cmd->capability = cpu_to_le16(bss->capability);
1140 
1141 	/* add SSID TLV */
1142 	rcu_read_lock();
1143 	ssid_eid = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1144 	if (ssid_eid)
1145 		pos += lbs_add_ssid_tlv(pos, ssid_eid + 2, ssid_eid[1]);
1146 	else
1147 		lbs_deb_assoc("no SSID\n");
1148 	rcu_read_unlock();
1149 
1150 	/* add DS param TLV */
1151 	if (bss->channel)
1152 		pos += lbs_add_channel_tlv(pos, bss->channel->hw_value);
1153 	else
1154 		lbs_deb_assoc("no channel\n");
1155 
1156 	/* add (empty) CF param TLV */
1157 	pos += lbs_add_cf_param_tlv(pos);
1158 
1159 	/* add rates TLV */
1160 	tmp = pos + 4; /* skip Marvell IE header */
1161 	pos += lbs_add_common_rates_tlv(pos, bss);
1162 	lbs_deb_hex(LBS_DEB_ASSOC, "Common Rates", tmp, pos - tmp);
1163 
1164 	/* add auth type TLV */
1165 	if (MRVL_FW_MAJOR_REV(priv->fwrelease) >= 9)
1166 		pos += lbs_add_auth_type_tlv(pos, sme->auth_type);
1167 
1168 	/* add WPA/WPA2 TLV */
1169 	if (sme->ie && sme->ie_len)
1170 		pos += lbs_add_wpa_tlv(pos, sme->ie, sme->ie_len);
1171 
1172 	len = (sizeof(*cmd) - sizeof(cmd->iebuf)) +
1173 		(u16)(pos - (u8 *) &cmd->iebuf);
1174 	cmd->hdr.size = cpu_to_le16(len);
1175 
1176 	lbs_deb_hex(LBS_DEB_ASSOC, "ASSOC_CMD", (u8 *) cmd,
1177 			le16_to_cpu(cmd->hdr.size));
1178 
1179 	/* store for later use */
1180 	memcpy(priv->assoc_bss, bss->bssid, ETH_ALEN);
1181 
1182 	ret = lbs_cmd_with_response(priv, CMD_802_11_ASSOCIATE, cmd);
1183 	if (ret)
1184 		goto done;
1185 
1186 	/* generate connect message to cfg80211 */
1187 
1188 	resp = (void *) cmd; /* recast for easier field access */
1189 	status = le16_to_cpu(resp->statuscode);
1190 
1191 	/* Older FW versions map the IEEE 802.11 Status Code in the association
1192 	 * response to the following values returned in resp->statuscode:
1193 	 *
1194 	 *    IEEE Status Code                Marvell Status Code
1195 	 *    0                       ->      0x0000 ASSOC_RESULT_SUCCESS
1196 	 *    13                      ->      0x0004 ASSOC_RESULT_AUTH_REFUSED
1197 	 *    14                      ->      0x0004 ASSOC_RESULT_AUTH_REFUSED
1198 	 *    15                      ->      0x0004 ASSOC_RESULT_AUTH_REFUSED
1199 	 *    16                      ->      0x0004 ASSOC_RESULT_AUTH_REFUSED
1200 	 *    others                  ->      0x0003 ASSOC_RESULT_REFUSED
1201 	 *
1202 	 * Other response codes:
1203 	 *    0x0001 -> ASSOC_RESULT_INVALID_PARAMETERS (unused)
1204 	 *    0x0002 -> ASSOC_RESULT_TIMEOUT (internal timer expired waiting for
1205 	 *                                    association response from the AP)
1206 	 */
1207 	if (MRVL_FW_MAJOR_REV(priv->fwrelease) <= 8) {
1208 		switch (status) {
1209 		case 0:
1210 			break;
1211 		case 1:
1212 			lbs_deb_assoc("invalid association parameters\n");
1213 			status = WLAN_STATUS_CAPS_UNSUPPORTED;
1214 			break;
1215 		case 2:
1216 			lbs_deb_assoc("timer expired while waiting for AP\n");
1217 			status = WLAN_STATUS_AUTH_TIMEOUT;
1218 			break;
1219 		case 3:
1220 			lbs_deb_assoc("association refused by AP\n");
1221 			status = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1222 			break;
1223 		case 4:
1224 			lbs_deb_assoc("authentication refused by AP\n");
1225 			status = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1226 			break;
1227 		default:
1228 			lbs_deb_assoc("association failure %d\n", status);
1229 			/* v5 OLPC firmware does return the AP status code if
1230 			 * it's not one of the values above.  Let that through.
1231 			 */
1232 			break;
1233 		}
1234 	}
1235 
1236 	lbs_deb_assoc("status %d, statuscode 0x%04x, capability 0x%04x, "
1237 		      "aid 0x%04x\n", status, le16_to_cpu(resp->statuscode),
1238 		      le16_to_cpu(resp->capability), le16_to_cpu(resp->aid));
1239 
1240 	resp_ie_len = le16_to_cpu(resp->hdr.size)
1241 		- sizeof(resp->hdr)
1242 		- 6;
1243 	cfg80211_connect_result(priv->dev,
1244 				priv->assoc_bss,
1245 				sme->ie, sme->ie_len,
1246 				resp->iebuf, resp_ie_len,
1247 				status,
1248 				GFP_KERNEL);
1249 
1250 	if (status == 0) {
1251 		/* TODO: get rid of priv->connect_status */
1252 		priv->connect_status = LBS_CONNECTED;
1253 		netif_carrier_on(priv->dev);
1254 		if (!priv->tx_pending_len)
1255 			netif_tx_wake_all_queues(priv->dev);
1256 	}
1257 
1258 	kfree(cmd);
1259 done:
1260 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
1261 	return ret;
1262 }
1263 
1264 static struct cfg80211_scan_request *
1265 _new_connect_scan_req(struct wiphy *wiphy, struct cfg80211_connect_params *sme)
1266 {
1267 	struct cfg80211_scan_request *creq = NULL;
1268 	int i, n_channels = ieee80211_get_num_supported_channels(wiphy);
1269 	enum ieee80211_band band;
1270 
1271 	creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
1272 		       n_channels * sizeof(void *),
1273 		       GFP_ATOMIC);
1274 	if (!creq)
1275 		return NULL;
1276 
1277 	/* SSIDs come after channels */
1278 	creq->ssids = (void *)&creq->channels[n_channels];
1279 	creq->n_channels = n_channels;
1280 	creq->n_ssids = 1;
1281 
1282 	/* Scan all available channels */
1283 	i = 0;
1284 	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1285 		int j;
1286 
1287 		if (!wiphy->bands[band])
1288 			continue;
1289 
1290 		for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
1291 			/* ignore disabled channels */
1292 			if (wiphy->bands[band]->channels[j].flags &
1293 						IEEE80211_CHAN_DISABLED)
1294 				continue;
1295 
1296 			creq->channels[i] = &wiphy->bands[band]->channels[j];
1297 			i++;
1298 		}
1299 	}
1300 	if (i) {
1301 		/* Set real number of channels specified in creq->channels[] */
1302 		creq->n_channels = i;
1303 
1304 		/* Scan for the SSID we're going to connect to */
1305 		memcpy(creq->ssids[0].ssid, sme->ssid, sme->ssid_len);
1306 		creq->ssids[0].ssid_len = sme->ssid_len;
1307 	} else {
1308 		/* No channels found... */
1309 		kfree(creq);
1310 		creq = NULL;
1311 	}
1312 
1313 	return creq;
1314 }
1315 
1316 static int lbs_cfg_connect(struct wiphy *wiphy, struct net_device *dev,
1317 			   struct cfg80211_connect_params *sme)
1318 {
1319 	struct lbs_private *priv = wiphy_priv(wiphy);
1320 	struct cfg80211_bss *bss = NULL;
1321 	int ret = 0;
1322 	u8 preamble = RADIO_PREAMBLE_SHORT;
1323 
1324 	if (dev == priv->mesh_dev)
1325 		return -EOPNOTSUPP;
1326 
1327 	lbs_deb_enter(LBS_DEB_CFG80211);
1328 
1329 	if (!sme->bssid) {
1330 		struct cfg80211_scan_request *creq;
1331 
1332 		/*
1333 		 * Scan for the requested network after waiting for existing
1334 		 * scans to finish.
1335 		 */
1336 		lbs_deb_assoc("assoc: waiting for existing scans\n");
1337 		wait_event_interruptible_timeout(priv->scan_q,
1338 						 (priv->scan_req == NULL),
1339 						 (15 * HZ));
1340 
1341 		creq = _new_connect_scan_req(wiphy, sme);
1342 		if (!creq) {
1343 			ret = -EINVAL;
1344 			goto done;
1345 		}
1346 
1347 		lbs_deb_assoc("assoc: scanning for compatible AP\n");
1348 		_internal_start_scan(priv, true, creq);
1349 
1350 		lbs_deb_assoc("assoc: waiting for scan to complete\n");
1351 		wait_event_interruptible_timeout(priv->scan_q,
1352 						 (priv->scan_req == NULL),
1353 						 (15 * HZ));
1354 		lbs_deb_assoc("assoc: scanning completed\n");
1355 	}
1356 
1357 	/* Find the BSS we want using available scan results */
1358 	bss = cfg80211_get_bss(wiphy, sme->channel, sme->bssid,
1359 		sme->ssid, sme->ssid_len, IEEE80211_BSS_TYPE_ESS,
1360 		IEEE80211_PRIVACY_ANY);
1361 	if (!bss) {
1362 		wiphy_err(wiphy, "assoc: bss %pM not in scan results\n",
1363 			  sme->bssid);
1364 		ret = -ENOENT;
1365 		goto done;
1366 	}
1367 	lbs_deb_assoc("trying %pM\n", bss->bssid);
1368 	lbs_deb_assoc("cipher 0x%x, key index %d, key len %d\n",
1369 		      sme->crypto.cipher_group,
1370 		      sme->key_idx, sme->key_len);
1371 
1372 	/* As this is a new connection, clear locally stored WEP keys */
1373 	priv->wep_tx_key = 0;
1374 	memset(priv->wep_key, 0, sizeof(priv->wep_key));
1375 	memset(priv->wep_key_len, 0, sizeof(priv->wep_key_len));
1376 
1377 	/* set/remove WEP keys */
1378 	switch (sme->crypto.cipher_group) {
1379 	case WLAN_CIPHER_SUITE_WEP40:
1380 	case WLAN_CIPHER_SUITE_WEP104:
1381 		/* Store provided WEP keys in priv-> */
1382 		priv->wep_tx_key = sme->key_idx;
1383 		priv->wep_key_len[sme->key_idx] = sme->key_len;
1384 		memcpy(priv->wep_key[sme->key_idx], sme->key, sme->key_len);
1385 		/* Set WEP keys and WEP mode */
1386 		lbs_set_wep_keys(priv);
1387 		priv->mac_control |= CMD_ACT_MAC_WEP_ENABLE;
1388 		lbs_set_mac_control(priv);
1389 		/* No RSN mode for WEP */
1390 		lbs_enable_rsn(priv, 0);
1391 		break;
1392 	case 0: /* there's no WLAN_CIPHER_SUITE_NONE definition */
1393 		/*
1394 		 * If we don't have no WEP, no WPA and no WPA2,
1395 		 * we remove all keys like in the WPA/WPA2 setup,
1396 		 * we just don't set RSN.
1397 		 *
1398 		 * Therefore: fall-through
1399 		 */
1400 	case WLAN_CIPHER_SUITE_TKIP:
1401 	case WLAN_CIPHER_SUITE_CCMP:
1402 		/* Remove WEP keys and WEP mode */
1403 		lbs_remove_wep_keys(priv);
1404 		priv->mac_control &= ~CMD_ACT_MAC_WEP_ENABLE;
1405 		lbs_set_mac_control(priv);
1406 
1407 		/* clear the WPA/WPA2 keys */
1408 		lbs_set_key_material(priv,
1409 			KEY_TYPE_ID_WEP, /* doesn't matter */
1410 			KEY_INFO_WPA_UNICAST,
1411 			NULL, 0);
1412 		lbs_set_key_material(priv,
1413 			KEY_TYPE_ID_WEP, /* doesn't matter */
1414 			KEY_INFO_WPA_MCAST,
1415 			NULL, 0);
1416 		/* RSN mode for WPA/WPA2 */
1417 		lbs_enable_rsn(priv, sme->crypto.cipher_group != 0);
1418 		break;
1419 	default:
1420 		wiphy_err(wiphy, "unsupported cipher group 0x%x\n",
1421 			  sme->crypto.cipher_group);
1422 		ret = -ENOTSUPP;
1423 		goto done;
1424 	}
1425 
1426 	ret = lbs_set_authtype(priv, sme);
1427 	if (ret == -ENOTSUPP) {
1428 		wiphy_err(wiphy, "unsupported authtype 0x%x\n", sme->auth_type);
1429 		goto done;
1430 	}
1431 
1432 	lbs_set_radio(priv, preamble, 1);
1433 
1434 	/* Do the actual association */
1435 	ret = lbs_associate(priv, bss, sme);
1436 
1437  done:
1438 	if (bss)
1439 		cfg80211_put_bss(wiphy, bss);
1440 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
1441 	return ret;
1442 }
1443 
1444 int lbs_disconnect(struct lbs_private *priv, u16 reason)
1445 {
1446 	struct cmd_ds_802_11_deauthenticate cmd;
1447 	int ret;
1448 
1449 	memset(&cmd, 0, sizeof(cmd));
1450 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1451 	/* Mildly ugly to use a locally store my own BSSID ... */
1452 	memcpy(cmd.macaddr, &priv->assoc_bss, ETH_ALEN);
1453 	cmd.reasoncode = cpu_to_le16(reason);
1454 
1455 	ret = lbs_cmd_with_response(priv, CMD_802_11_DEAUTHENTICATE, &cmd);
1456 	if (ret)
1457 		return ret;
1458 
1459 	cfg80211_disconnected(priv->dev,
1460 			reason,
1461 			NULL, 0, true,
1462 			GFP_KERNEL);
1463 	priv->connect_status = LBS_DISCONNECTED;
1464 
1465 	return 0;
1466 }
1467 
1468 static int lbs_cfg_disconnect(struct wiphy *wiphy, struct net_device *dev,
1469 	u16 reason_code)
1470 {
1471 	struct lbs_private *priv = wiphy_priv(wiphy);
1472 
1473 	if (dev == priv->mesh_dev)
1474 		return -EOPNOTSUPP;
1475 
1476 	lbs_deb_enter_args(LBS_DEB_CFG80211, "reason_code %d", reason_code);
1477 
1478 	/* store for lbs_cfg_ret_disconnect() */
1479 	priv->disassoc_reason = reason_code;
1480 
1481 	return lbs_disconnect(priv, reason_code);
1482 }
1483 
1484 static int lbs_cfg_set_default_key(struct wiphy *wiphy,
1485 				   struct net_device *netdev,
1486 				   u8 key_index, bool unicast,
1487 				   bool multicast)
1488 {
1489 	struct lbs_private *priv = wiphy_priv(wiphy);
1490 
1491 	if (netdev == priv->mesh_dev)
1492 		return -EOPNOTSUPP;
1493 
1494 	lbs_deb_enter(LBS_DEB_CFG80211);
1495 
1496 	if (key_index != priv->wep_tx_key) {
1497 		lbs_deb_assoc("set_default_key: to %d\n", key_index);
1498 		priv->wep_tx_key = key_index;
1499 		lbs_set_wep_keys(priv);
1500 	}
1501 
1502 	return 0;
1503 }
1504 
1505 
1506 static int lbs_cfg_add_key(struct wiphy *wiphy, struct net_device *netdev,
1507 			   u8 idx, bool pairwise, const u8 *mac_addr,
1508 			   struct key_params *params)
1509 {
1510 	struct lbs_private *priv = wiphy_priv(wiphy);
1511 	u16 key_info;
1512 	u16 key_type;
1513 	int ret = 0;
1514 
1515 	if (netdev == priv->mesh_dev)
1516 		return -EOPNOTSUPP;
1517 
1518 	lbs_deb_enter(LBS_DEB_CFG80211);
1519 
1520 	lbs_deb_assoc("add_key: cipher 0x%x, mac_addr %pM\n",
1521 		      params->cipher, mac_addr);
1522 	lbs_deb_assoc("add_key: key index %d, key len %d\n",
1523 		      idx, params->key_len);
1524 	if (params->key_len)
1525 		lbs_deb_hex(LBS_DEB_CFG80211, "KEY",
1526 			    params->key, params->key_len);
1527 
1528 	lbs_deb_assoc("add_key: seq len %d\n", params->seq_len);
1529 	if (params->seq_len)
1530 		lbs_deb_hex(LBS_DEB_CFG80211, "SEQ",
1531 			    params->seq, params->seq_len);
1532 
1533 	switch (params->cipher) {
1534 	case WLAN_CIPHER_SUITE_WEP40:
1535 	case WLAN_CIPHER_SUITE_WEP104:
1536 		/* actually compare if something has changed ... */
1537 		if ((priv->wep_key_len[idx] != params->key_len) ||
1538 			memcmp(priv->wep_key[idx],
1539 			       params->key, params->key_len) != 0) {
1540 			priv->wep_key_len[idx] = params->key_len;
1541 			memcpy(priv->wep_key[idx],
1542 			       params->key, params->key_len);
1543 			lbs_set_wep_keys(priv);
1544 		}
1545 		break;
1546 	case WLAN_CIPHER_SUITE_TKIP:
1547 	case WLAN_CIPHER_SUITE_CCMP:
1548 		key_info = KEY_INFO_WPA_ENABLED | ((idx == 0)
1549 						   ? KEY_INFO_WPA_UNICAST
1550 						   : KEY_INFO_WPA_MCAST);
1551 		key_type = (params->cipher == WLAN_CIPHER_SUITE_TKIP)
1552 			? KEY_TYPE_ID_TKIP
1553 			: KEY_TYPE_ID_AES;
1554 		lbs_set_key_material(priv,
1555 				     key_type,
1556 				     key_info,
1557 				     params->key, params->key_len);
1558 		break;
1559 	default:
1560 		wiphy_err(wiphy, "unhandled cipher 0x%x\n", params->cipher);
1561 		ret = -ENOTSUPP;
1562 		break;
1563 	}
1564 
1565 	return ret;
1566 }
1567 
1568 
1569 static int lbs_cfg_del_key(struct wiphy *wiphy, struct net_device *netdev,
1570 			   u8 key_index, bool pairwise, const u8 *mac_addr)
1571 {
1572 
1573 	lbs_deb_enter(LBS_DEB_CFG80211);
1574 
1575 	lbs_deb_assoc("del_key: key_idx %d, mac_addr %pM\n",
1576 		      key_index, mac_addr);
1577 
1578 #ifdef TODO
1579 	struct lbs_private *priv = wiphy_priv(wiphy);
1580 	/*
1581 	 * I think can keep this a NO-OP, because:
1582 
1583 	 * - we clear all keys whenever we do lbs_cfg_connect() anyway
1584 	 * - neither "iw" nor "wpa_supplicant" won't call this during
1585 	 *   an ongoing connection
1586 	 * - TODO: but I have to check if this is still true when
1587 	 *   I set the AP to periodic re-keying
1588 	 * - we've not kzallec() something when we've added a key at
1589 	 *   lbs_cfg_connect() or lbs_cfg_add_key().
1590 	 *
1591 	 * This causes lbs_cfg_del_key() only called at disconnect time,
1592 	 * where we'd just waste time deleting a key that is not going
1593 	 * to be used anyway.
1594 	 */
1595 	if (key_index < 3 && priv->wep_key_len[key_index]) {
1596 		priv->wep_key_len[key_index] = 0;
1597 		lbs_set_wep_keys(priv);
1598 	}
1599 #endif
1600 
1601 	return 0;
1602 }
1603 
1604 
1605 /*
1606  * Get station
1607  */
1608 
1609 static int lbs_cfg_get_station(struct wiphy *wiphy, struct net_device *dev,
1610 			       const u8 *mac, struct station_info *sinfo)
1611 {
1612 	struct lbs_private *priv = wiphy_priv(wiphy);
1613 	s8 signal, noise;
1614 	int ret;
1615 	size_t i;
1616 
1617 	lbs_deb_enter(LBS_DEB_CFG80211);
1618 
1619 	sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES) |
1620 			 BIT(NL80211_STA_INFO_TX_PACKETS) |
1621 			 BIT(NL80211_STA_INFO_RX_BYTES) |
1622 			 BIT(NL80211_STA_INFO_RX_PACKETS);
1623 	sinfo->tx_bytes = priv->dev->stats.tx_bytes;
1624 	sinfo->tx_packets = priv->dev->stats.tx_packets;
1625 	sinfo->rx_bytes = priv->dev->stats.rx_bytes;
1626 	sinfo->rx_packets = priv->dev->stats.rx_packets;
1627 
1628 	/* Get current RSSI */
1629 	ret = lbs_get_rssi(priv, &signal, &noise);
1630 	if (ret == 0) {
1631 		sinfo->signal = signal;
1632 		sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
1633 	}
1634 
1635 	/* Convert priv->cur_rate from hw_value to NL80211 value */
1636 	for (i = 0; i < ARRAY_SIZE(lbs_rates); i++) {
1637 		if (priv->cur_rate == lbs_rates[i].hw_value) {
1638 			sinfo->txrate.legacy = lbs_rates[i].bitrate;
1639 			sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
1640 			break;
1641 		}
1642 	}
1643 
1644 	return 0;
1645 }
1646 
1647 
1648 
1649 
1650 /*
1651  * Change interface
1652  */
1653 
1654 static int lbs_change_intf(struct wiphy *wiphy, struct net_device *dev,
1655 	enum nl80211_iftype type, u32 *flags,
1656 	       struct vif_params *params)
1657 {
1658 	struct lbs_private *priv = wiphy_priv(wiphy);
1659 	int ret = 0;
1660 
1661 	if (dev == priv->mesh_dev)
1662 		return -EOPNOTSUPP;
1663 
1664 	switch (type) {
1665 	case NL80211_IFTYPE_MONITOR:
1666 	case NL80211_IFTYPE_STATION:
1667 	case NL80211_IFTYPE_ADHOC:
1668 		break;
1669 	default:
1670 		return -EOPNOTSUPP;
1671 	}
1672 
1673 	lbs_deb_enter(LBS_DEB_CFG80211);
1674 
1675 	if (priv->iface_running)
1676 		ret = lbs_set_iface_type(priv, type);
1677 
1678 	if (!ret)
1679 		priv->wdev->iftype = type;
1680 
1681 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
1682 	return ret;
1683 }
1684 
1685 
1686 
1687 /*
1688  * IBSS (Ad-Hoc)
1689  */
1690 
1691 /*
1692  * The firmware needs the following bits masked out of the beacon-derived
1693  * capability field when associating/joining to a BSS:
1694  *  9 (QoS), 11 (APSD), 12 (unused), 14 (unused), 15 (unused)
1695  */
1696 #define CAPINFO_MASK (~(0xda00))
1697 
1698 
1699 static void lbs_join_post(struct lbs_private *priv,
1700 			  struct cfg80211_ibss_params *params,
1701 			  u8 *bssid, u16 capability)
1702 {
1703 	u8 fake_ie[2 + IEEE80211_MAX_SSID_LEN + /* ssid */
1704 		   2 + 4 +                      /* basic rates */
1705 		   2 + 1 +                      /* DS parameter */
1706 		   2 + 2 +                      /* atim */
1707 		   2 + 8];                      /* extended rates */
1708 	u8 *fake = fake_ie;
1709 	struct cfg80211_bss *bss;
1710 
1711 	lbs_deb_enter(LBS_DEB_CFG80211);
1712 
1713 	/*
1714 	 * For cfg80211_inform_bss, we'll need a fake IE, as we can't get
1715 	 * the real IE from the firmware. So we fabricate a fake IE based on
1716 	 * what the firmware actually sends (sniffed with wireshark).
1717 	 */
1718 	/* Fake SSID IE */
1719 	*fake++ = WLAN_EID_SSID;
1720 	*fake++ = params->ssid_len;
1721 	memcpy(fake, params->ssid, params->ssid_len);
1722 	fake += params->ssid_len;
1723 	/* Fake supported basic rates IE */
1724 	*fake++ = WLAN_EID_SUPP_RATES;
1725 	*fake++ = 4;
1726 	*fake++ = 0x82;
1727 	*fake++ = 0x84;
1728 	*fake++ = 0x8b;
1729 	*fake++ = 0x96;
1730 	/* Fake DS channel IE */
1731 	*fake++ = WLAN_EID_DS_PARAMS;
1732 	*fake++ = 1;
1733 	*fake++ = params->chandef.chan->hw_value;
1734 	/* Fake IBSS params IE */
1735 	*fake++ = WLAN_EID_IBSS_PARAMS;
1736 	*fake++ = 2;
1737 	*fake++ = 0; /* ATIM=0 */
1738 	*fake++ = 0;
1739 	/* Fake extended rates IE, TODO: don't add this for 802.11b only,
1740 	 * but I don't know how this could be checked */
1741 	*fake++ = WLAN_EID_EXT_SUPP_RATES;
1742 	*fake++ = 8;
1743 	*fake++ = 0x0c;
1744 	*fake++ = 0x12;
1745 	*fake++ = 0x18;
1746 	*fake++ = 0x24;
1747 	*fake++ = 0x30;
1748 	*fake++ = 0x48;
1749 	*fake++ = 0x60;
1750 	*fake++ = 0x6c;
1751 	lbs_deb_hex(LBS_DEB_CFG80211, "IE", fake_ie, fake - fake_ie);
1752 
1753 	bss = cfg80211_inform_bss(priv->wdev->wiphy,
1754 				  params->chandef.chan,
1755 				  CFG80211_BSS_FTYPE_UNKNOWN,
1756 				  bssid,
1757 				  0,
1758 				  capability,
1759 				  params->beacon_interval,
1760 				  fake_ie, fake - fake_ie,
1761 				  0, GFP_KERNEL);
1762 	cfg80211_put_bss(priv->wdev->wiphy, bss);
1763 
1764 	memcpy(priv->wdev->ssid, params->ssid, params->ssid_len);
1765 	priv->wdev->ssid_len = params->ssid_len;
1766 
1767 	cfg80211_ibss_joined(priv->dev, bssid, params->chandef.chan,
1768 			     GFP_KERNEL);
1769 
1770 	/* TODO: consider doing this at MACREG_INT_CODE_LINK_SENSED time */
1771 	priv->connect_status = LBS_CONNECTED;
1772 	netif_carrier_on(priv->dev);
1773 	if (!priv->tx_pending_len)
1774 		netif_wake_queue(priv->dev);
1775 
1776 	lbs_deb_leave(LBS_DEB_CFG80211);
1777 }
1778 
1779 static int lbs_ibss_join_existing(struct lbs_private *priv,
1780 	struct cfg80211_ibss_params *params,
1781 	struct cfg80211_bss *bss)
1782 {
1783 	const u8 *rates_eid;
1784 	struct cmd_ds_802_11_ad_hoc_join cmd;
1785 	u8 preamble = RADIO_PREAMBLE_SHORT;
1786 	int ret = 0;
1787 
1788 	lbs_deb_enter(LBS_DEB_CFG80211);
1789 
1790 	/* TODO: set preamble based on scan result */
1791 	ret = lbs_set_radio(priv, preamble, 1);
1792 	if (ret)
1793 		goto out;
1794 
1795 	/*
1796 	 * Example CMD_802_11_AD_HOC_JOIN command:
1797 	 *
1798 	 * command         2c 00         CMD_802_11_AD_HOC_JOIN
1799 	 * size            65 00
1800 	 * sequence        xx xx
1801 	 * result          00 00
1802 	 * bssid           02 27 27 97 2f 96
1803 	 * ssid            49 42 53 53 00 00 00 00
1804 	 *                 00 00 00 00 00 00 00 00
1805 	 *                 00 00 00 00 00 00 00 00
1806 	 *                 00 00 00 00 00 00 00 00
1807 	 * type            02            CMD_BSS_TYPE_IBSS
1808 	 * beacon period   64 00
1809 	 * dtim period     00
1810 	 * timestamp       00 00 00 00 00 00 00 00
1811 	 * localtime       00 00 00 00 00 00 00 00
1812 	 * IE DS           03
1813 	 * IE DS len       01
1814 	 * IE DS channel   01
1815 	 * reserveed       00 00 00 00
1816 	 * IE IBSS         06
1817 	 * IE IBSS len     02
1818 	 * IE IBSS atim    00 00
1819 	 * reserved        00 00 00 00
1820 	 * capability      02 00
1821 	 * rates           82 84 8b 96 0c 12 18 24 30 48 60 6c 00
1822 	 * fail timeout    ff 00
1823 	 * probe delay     00 00
1824 	 */
1825 	memset(&cmd, 0, sizeof(cmd));
1826 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1827 
1828 	memcpy(cmd.bss.bssid, bss->bssid, ETH_ALEN);
1829 	memcpy(cmd.bss.ssid, params->ssid, params->ssid_len);
1830 	cmd.bss.type = CMD_BSS_TYPE_IBSS;
1831 	cmd.bss.beaconperiod = cpu_to_le16(params->beacon_interval);
1832 	cmd.bss.ds.header.id = WLAN_EID_DS_PARAMS;
1833 	cmd.bss.ds.header.len = 1;
1834 	cmd.bss.ds.channel = params->chandef.chan->hw_value;
1835 	cmd.bss.ibss.header.id = WLAN_EID_IBSS_PARAMS;
1836 	cmd.bss.ibss.header.len = 2;
1837 	cmd.bss.ibss.atimwindow = 0;
1838 	cmd.bss.capability = cpu_to_le16(bss->capability & CAPINFO_MASK);
1839 
1840 	/* set rates to the intersection of our rates and the rates in the
1841 	   bss */
1842 	rcu_read_lock();
1843 	rates_eid = ieee80211_bss_get_ie(bss, WLAN_EID_SUPP_RATES);
1844 	if (!rates_eid) {
1845 		lbs_add_rates(cmd.bss.rates);
1846 	} else {
1847 		int hw, i;
1848 		u8 rates_max = rates_eid[1];
1849 		u8 *rates = cmd.bss.rates;
1850 		for (hw = 0; hw < ARRAY_SIZE(lbs_rates); hw++) {
1851 			u8 hw_rate = lbs_rates[hw].bitrate / 5;
1852 			for (i = 0; i < rates_max; i++) {
1853 				if (hw_rate == (rates_eid[i+2] & 0x7f)) {
1854 					u8 rate = rates_eid[i+2];
1855 					if (rate == 0x02 || rate == 0x04 ||
1856 					    rate == 0x0b || rate == 0x16)
1857 						rate |= 0x80;
1858 					*rates++ = rate;
1859 				}
1860 			}
1861 		}
1862 	}
1863 	rcu_read_unlock();
1864 
1865 	/* Only v8 and below support setting this */
1866 	if (MRVL_FW_MAJOR_REV(priv->fwrelease) <= 8) {
1867 		cmd.failtimeout = cpu_to_le16(MRVDRV_ASSOCIATION_TIME_OUT);
1868 		cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME);
1869 	}
1870 	ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_JOIN, &cmd);
1871 	if (ret)
1872 		goto out;
1873 
1874 	/*
1875 	 * This is a sample response to CMD_802_11_AD_HOC_JOIN:
1876 	 *
1877 	 * response        2c 80
1878 	 * size            09 00
1879 	 * sequence        xx xx
1880 	 * result          00 00
1881 	 * reserved        00
1882 	 */
1883 	lbs_join_post(priv, params, bss->bssid, bss->capability);
1884 
1885  out:
1886 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
1887 	return ret;
1888 }
1889 
1890 
1891 
1892 static int lbs_ibss_start_new(struct lbs_private *priv,
1893 	struct cfg80211_ibss_params *params)
1894 {
1895 	struct cmd_ds_802_11_ad_hoc_start cmd;
1896 	struct cmd_ds_802_11_ad_hoc_result *resp =
1897 		(struct cmd_ds_802_11_ad_hoc_result *) &cmd;
1898 	u8 preamble = RADIO_PREAMBLE_SHORT;
1899 	int ret = 0;
1900 	u16 capability;
1901 
1902 	lbs_deb_enter(LBS_DEB_CFG80211);
1903 
1904 	ret = lbs_set_radio(priv, preamble, 1);
1905 	if (ret)
1906 		goto out;
1907 
1908 	/*
1909 	 * Example CMD_802_11_AD_HOC_START command:
1910 	 *
1911 	 * command         2b 00         CMD_802_11_AD_HOC_START
1912 	 * size            b1 00
1913 	 * sequence        xx xx
1914 	 * result          00 00
1915 	 * ssid            54 45 53 54 00 00 00 00
1916 	 *                 00 00 00 00 00 00 00 00
1917 	 *                 00 00 00 00 00 00 00 00
1918 	 *                 00 00 00 00 00 00 00 00
1919 	 * bss type        02
1920 	 * beacon period   64 00
1921 	 * dtim period     00
1922 	 * IE IBSS         06
1923 	 * IE IBSS len     02
1924 	 * IE IBSS atim    00 00
1925 	 * reserved        00 00 00 00
1926 	 * IE DS           03
1927 	 * IE DS len       01
1928 	 * IE DS channel   01
1929 	 * reserved        00 00 00 00
1930 	 * probe delay     00 00
1931 	 * capability      02 00
1932 	 * rates           82 84 8b 96   (basic rates with have bit 7 set)
1933 	 *                 0c 12 18 24 30 48 60 6c
1934 	 * padding         100 bytes
1935 	 */
1936 	memset(&cmd, 0, sizeof(cmd));
1937 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1938 	memcpy(cmd.ssid, params->ssid, params->ssid_len);
1939 	cmd.bsstype = CMD_BSS_TYPE_IBSS;
1940 	cmd.beaconperiod = cpu_to_le16(params->beacon_interval);
1941 	cmd.ibss.header.id = WLAN_EID_IBSS_PARAMS;
1942 	cmd.ibss.header.len = 2;
1943 	cmd.ibss.atimwindow = 0;
1944 	cmd.ds.header.id = WLAN_EID_DS_PARAMS;
1945 	cmd.ds.header.len = 1;
1946 	cmd.ds.channel = params->chandef.chan->hw_value;
1947 	/* Only v8 and below support setting probe delay */
1948 	if (MRVL_FW_MAJOR_REV(priv->fwrelease) <= 8)
1949 		cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME);
1950 	/* TODO: mix in WLAN_CAPABILITY_PRIVACY */
1951 	capability = WLAN_CAPABILITY_IBSS;
1952 	cmd.capability = cpu_to_le16(capability);
1953 	lbs_add_rates(cmd.rates);
1954 
1955 
1956 	ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_START, &cmd);
1957 	if (ret)
1958 		goto out;
1959 
1960 	/*
1961 	 * This is a sample response to CMD_802_11_AD_HOC_JOIN:
1962 	 *
1963 	 * response        2b 80
1964 	 * size            14 00
1965 	 * sequence        xx xx
1966 	 * result          00 00
1967 	 * reserved        00
1968 	 * bssid           02 2b 7b 0f 86 0e
1969 	 */
1970 	lbs_join_post(priv, params, resp->bssid, capability);
1971 
1972  out:
1973 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
1974 	return ret;
1975 }
1976 
1977 
1978 static int lbs_join_ibss(struct wiphy *wiphy, struct net_device *dev,
1979 		struct cfg80211_ibss_params *params)
1980 {
1981 	struct lbs_private *priv = wiphy_priv(wiphy);
1982 	int ret = 0;
1983 	struct cfg80211_bss *bss;
1984 
1985 	if (dev == priv->mesh_dev)
1986 		return -EOPNOTSUPP;
1987 
1988 	lbs_deb_enter(LBS_DEB_CFG80211);
1989 
1990 	if (!params->chandef.chan) {
1991 		ret = -ENOTSUPP;
1992 		goto out;
1993 	}
1994 
1995 	ret = lbs_set_channel(priv, params->chandef.chan->hw_value);
1996 	if (ret)
1997 		goto out;
1998 
1999 	/* Search if someone is beaconing. This assumes that the
2000 	 * bss list is populated already */
2001 	bss = cfg80211_get_bss(wiphy, params->chandef.chan, params->bssid,
2002 		params->ssid, params->ssid_len,
2003 		IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);
2004 
2005 	if (bss) {
2006 		ret = lbs_ibss_join_existing(priv, params, bss);
2007 		cfg80211_put_bss(wiphy, bss);
2008 	} else
2009 		ret = lbs_ibss_start_new(priv, params);
2010 
2011 
2012  out:
2013 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
2014 	return ret;
2015 }
2016 
2017 
2018 static int lbs_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2019 {
2020 	struct lbs_private *priv = wiphy_priv(wiphy);
2021 	struct cmd_ds_802_11_ad_hoc_stop cmd;
2022 	int ret = 0;
2023 
2024 	if (dev == priv->mesh_dev)
2025 		return -EOPNOTSUPP;
2026 
2027 	lbs_deb_enter(LBS_DEB_CFG80211);
2028 
2029 	memset(&cmd, 0, sizeof(cmd));
2030 	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
2031 	ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_STOP, &cmd);
2032 
2033 	/* TODO: consider doing this at MACREG_INT_CODE_ADHOC_BCN_LOST time */
2034 	lbs_mac_event_disconnected(priv, true);
2035 
2036 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
2037 	return ret;
2038 }
2039 
2040 
2041 
2042 int lbs_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2043 		       bool enabled, int timeout)
2044 {
2045 	struct lbs_private *priv = wiphy_priv(wiphy);
2046 
2047 	if  (!(priv->fwcapinfo & FW_CAPINFO_PS)) {
2048 		if (!enabled)
2049 			return 0;
2050 		else
2051 			return -EINVAL;
2052 	}
2053 	/* firmware does not work well with too long latency with power saving
2054 	 * enabled, so do not enable it if there is only polling, no
2055 	 * interrupts (like in some sdio hosts which can only
2056 	 * poll for sdio irqs)
2057 	 */
2058 	if  (priv->is_polling) {
2059 		if (!enabled)
2060 			return 0;
2061 		else
2062 			return -EINVAL;
2063 	}
2064 	if (!enabled) {
2065 		priv->psmode = LBS802_11POWERMODECAM;
2066 		if (priv->psstate != PS_STATE_FULL_POWER)
2067 			lbs_set_ps_mode(priv,
2068 					PS_MODE_ACTION_EXIT_PS,
2069 					true);
2070 		return 0;
2071 	}
2072 	if (priv->psmode != LBS802_11POWERMODECAM)
2073 		return 0;
2074 	priv->psmode = LBS802_11POWERMODEMAX_PSP;
2075 	if (priv->connect_status == LBS_CONNECTED)
2076 		lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS, true);
2077 	return 0;
2078 }
2079 
2080 /*
2081  * Initialization
2082  */
2083 
2084 static struct cfg80211_ops lbs_cfg80211_ops = {
2085 	.set_monitor_channel = lbs_cfg_set_monitor_channel,
2086 	.libertas_set_mesh_channel = lbs_cfg_set_mesh_channel,
2087 	.scan = lbs_cfg_scan,
2088 	.connect = lbs_cfg_connect,
2089 	.disconnect = lbs_cfg_disconnect,
2090 	.add_key = lbs_cfg_add_key,
2091 	.del_key = lbs_cfg_del_key,
2092 	.set_default_key = lbs_cfg_set_default_key,
2093 	.get_station = lbs_cfg_get_station,
2094 	.change_virtual_intf = lbs_change_intf,
2095 	.join_ibss = lbs_join_ibss,
2096 	.leave_ibss = lbs_leave_ibss,
2097 	.set_power_mgmt = lbs_set_power_mgmt,
2098 };
2099 
2100 
2101 /*
2102  * At this time lbs_private *priv doesn't even exist, so we just allocate
2103  * memory and don't initialize the wiphy further. This is postponed until we
2104  * can talk to the firmware and happens at registration time in
2105  * lbs_cfg_wiphy_register().
2106  */
2107 struct wireless_dev *lbs_cfg_alloc(struct device *dev)
2108 {
2109 	int ret = 0;
2110 	struct wireless_dev *wdev;
2111 
2112 	lbs_deb_enter(LBS_DEB_CFG80211);
2113 
2114 	wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
2115 	if (!wdev)
2116 		return ERR_PTR(-ENOMEM);
2117 
2118 	wdev->wiphy = wiphy_new(&lbs_cfg80211_ops, sizeof(struct lbs_private));
2119 	if (!wdev->wiphy) {
2120 		dev_err(dev, "cannot allocate wiphy\n");
2121 		ret = -ENOMEM;
2122 		goto err_wiphy_new;
2123 	}
2124 
2125 	lbs_deb_leave(LBS_DEB_CFG80211);
2126 	return wdev;
2127 
2128  err_wiphy_new:
2129 	kfree(wdev);
2130 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
2131 	return ERR_PTR(ret);
2132 }
2133 
2134 
2135 static void lbs_cfg_set_regulatory_hint(struct lbs_private *priv)
2136 {
2137 	struct region_code_mapping {
2138 		const char *cn;
2139 		int code;
2140 	};
2141 
2142 	/* Section 5.17.2 */
2143 	static const struct region_code_mapping regmap[] = {
2144 		{"US ", 0x10}, /* US FCC */
2145 		{"CA ", 0x20}, /* Canada */
2146 		{"EU ", 0x30}, /* ETSI   */
2147 		{"ES ", 0x31}, /* Spain  */
2148 		{"FR ", 0x32}, /* France */
2149 		{"JP ", 0x40}, /* Japan  */
2150 	};
2151 	size_t i;
2152 
2153 	lbs_deb_enter(LBS_DEB_CFG80211);
2154 
2155 	for (i = 0; i < ARRAY_SIZE(regmap); i++)
2156 		if (regmap[i].code == priv->regioncode) {
2157 			regulatory_hint(priv->wdev->wiphy, regmap[i].cn);
2158 			break;
2159 		}
2160 
2161 	lbs_deb_leave(LBS_DEB_CFG80211);
2162 }
2163 
2164 static void lbs_reg_notifier(struct wiphy *wiphy,
2165 			     struct regulatory_request *request)
2166 {
2167 	struct lbs_private *priv = wiphy_priv(wiphy);
2168 
2169 	lbs_deb_enter_args(LBS_DEB_CFG80211, "cfg80211 regulatory domain "
2170 			"callback for domain %c%c\n", request->alpha2[0],
2171 			request->alpha2[1]);
2172 
2173 	memcpy(priv->country_code, request->alpha2, sizeof(request->alpha2));
2174 	if (lbs_iface_active(priv))
2175 		lbs_set_11d_domain_info(priv);
2176 
2177 	lbs_deb_leave(LBS_DEB_CFG80211);
2178 }
2179 
2180 /*
2181  * This function get's called after lbs_setup_firmware() determined the
2182  * firmware capabities. So we can setup the wiphy according to our
2183  * hardware/firmware.
2184  */
2185 int lbs_cfg_register(struct lbs_private *priv)
2186 {
2187 	struct wireless_dev *wdev = priv->wdev;
2188 	int ret;
2189 
2190 	lbs_deb_enter(LBS_DEB_CFG80211);
2191 
2192 	wdev->wiphy->max_scan_ssids = 1;
2193 	wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2194 
2195 	wdev->wiphy->interface_modes =
2196 			BIT(NL80211_IFTYPE_STATION) |
2197 			BIT(NL80211_IFTYPE_ADHOC);
2198 	if (lbs_rtap_supported(priv))
2199 		wdev->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
2200 	if (lbs_mesh_activated(priv))
2201 		wdev->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MESH_POINT);
2202 
2203 	wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &lbs_band_2ghz;
2204 
2205 	/*
2206 	 * We could check priv->fwcapinfo && FW_CAPINFO_WPA, but I have
2207 	 * never seen a firmware without WPA
2208 	 */
2209 	wdev->wiphy->cipher_suites = cipher_suites;
2210 	wdev->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
2211 	wdev->wiphy->reg_notifier = lbs_reg_notifier;
2212 
2213 	ret = wiphy_register(wdev->wiphy);
2214 	if (ret < 0)
2215 		pr_err("cannot register wiphy device\n");
2216 
2217 	priv->wiphy_registered = true;
2218 
2219 	ret = register_netdev(priv->dev);
2220 	if (ret)
2221 		pr_err("cannot register network device\n");
2222 
2223 	INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);
2224 
2225 	lbs_cfg_set_regulatory_hint(priv);
2226 
2227 	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
2228 	return ret;
2229 }
2230 
2231 void lbs_scan_deinit(struct lbs_private *priv)
2232 {
2233 	lbs_deb_enter(LBS_DEB_CFG80211);
2234 	cancel_delayed_work_sync(&priv->scan_work);
2235 }
2236 
2237 
2238 void lbs_cfg_free(struct lbs_private *priv)
2239 {
2240 	struct wireless_dev *wdev = priv->wdev;
2241 
2242 	lbs_deb_enter(LBS_DEB_CFG80211);
2243 
2244 	if (!wdev)
2245 		return;
2246 
2247 	if (priv->wiphy_registered)
2248 		wiphy_unregister(wdev->wiphy);
2249 
2250 	if (wdev->wiphy)
2251 		wiphy_free(wdev->wiphy);
2252 
2253 	kfree(wdev);
2254 }
2255