1 /* Marvell Wireless LAN device driver: TDLS handling
2  *
3  * Copyright (C) 2014, Marvell International Ltd.
4  *
5  * This software file (the "File") is distributed by Marvell International
6  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
7  * (the "License").  You may use, redistribute and/or modify this File in
8  * accordance with the terms and conditions of the License, a copy of which
9  * is available on the worldwide web at
10  * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
11  *
12  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
13  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
14  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
15  * this warranty disclaimer.
16  */
17 
18 #include "main.h"
19 #include "wmm.h"
20 #include "11n.h"
21 #include "11n_rxreorder.h"
22 #include "11ac.h"
23 
24 #define TDLS_REQ_FIX_LEN      6
25 #define TDLS_RESP_FIX_LEN     8
26 #define TDLS_CONFIRM_FIX_LEN  6
27 #define MWIFIEX_TDLS_WMM_INFO_SIZE 7
28 
29 static void mwifiex_restore_tdls_packets(struct mwifiex_private *priv,
30 					 const u8 *mac, u8 status)
31 {
32 	struct mwifiex_ra_list_tbl *ra_list;
33 	struct list_head *tid_list;
34 	struct sk_buff *skb, *tmp;
35 	struct mwifiex_txinfo *tx_info;
36 	u32 tid;
37 	u8 tid_down;
38 
39 	mwifiex_dbg(priv->adapter, DATA, "%s: %pM\n", __func__, mac);
40 	spin_lock_bh(&priv->wmm.ra_list_spinlock);
41 
42 	skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) {
43 		if (!ether_addr_equal(mac, skb->data))
44 			continue;
45 
46 		__skb_unlink(skb, &priv->tdls_txq);
47 		tx_info = MWIFIEX_SKB_TXCB(skb);
48 		tid = skb->priority;
49 		tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
50 
51 		if (mwifiex_is_tdls_link_setup(status)) {
52 			ra_list = mwifiex_wmm_get_queue_raptr(priv, tid, mac);
53 			ra_list->tdls_link = true;
54 			tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
55 		} else {
56 			tid_list = &priv->wmm.tid_tbl_ptr[tid_down].ra_list;
57 			ra_list = list_first_entry_or_null(tid_list,
58 					struct mwifiex_ra_list_tbl, list);
59 			tx_info->flags &= ~MWIFIEX_BUF_FLAG_TDLS_PKT;
60 		}
61 
62 		if (!ra_list) {
63 			mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
64 			continue;
65 		}
66 
67 		skb_queue_tail(&ra_list->skb_head, skb);
68 
69 		ra_list->ba_pkt_count++;
70 		ra_list->total_pkt_count++;
71 
72 		if (atomic_read(&priv->wmm.highest_queued_prio) <
73 						       tos_to_tid_inv[tid_down])
74 			atomic_set(&priv->wmm.highest_queued_prio,
75 				   tos_to_tid_inv[tid_down]);
76 
77 		atomic_inc(&priv->wmm.tx_pkts_queued);
78 	}
79 
80 	spin_unlock_bh(&priv->wmm.ra_list_spinlock);
81 	return;
82 }
83 
84 static void mwifiex_hold_tdls_packets(struct mwifiex_private *priv,
85 				      const u8 *mac)
86 {
87 	struct mwifiex_ra_list_tbl *ra_list;
88 	struct list_head *ra_list_head;
89 	struct sk_buff *skb, *tmp;
90 	int i;
91 
92 	mwifiex_dbg(priv->adapter, DATA, "%s: %pM\n", __func__, mac);
93 	spin_lock_bh(&priv->wmm.ra_list_spinlock);
94 
95 	for (i = 0; i < MAX_NUM_TID; i++) {
96 		if (!list_empty(&priv->wmm.tid_tbl_ptr[i].ra_list)) {
97 			ra_list_head = &priv->wmm.tid_tbl_ptr[i].ra_list;
98 			list_for_each_entry(ra_list, ra_list_head, list) {
99 				skb_queue_walk_safe(&ra_list->skb_head, skb,
100 						    tmp) {
101 					if (!ether_addr_equal(mac, skb->data))
102 						continue;
103 					__skb_unlink(skb, &ra_list->skb_head);
104 					atomic_dec(&priv->wmm.tx_pkts_queued);
105 					ra_list->total_pkt_count--;
106 					skb_queue_tail(&priv->tdls_txq, skb);
107 				}
108 			}
109 		}
110 	}
111 
112 	spin_unlock_bh(&priv->wmm.ra_list_spinlock);
113 	return;
114 }
115 
116 /* This function appends rate TLV to scan config command. */
117 static int
118 mwifiex_tdls_append_rates_ie(struct mwifiex_private *priv,
119 			     struct sk_buff *skb)
120 {
121 	u8 rates[MWIFIEX_SUPPORTED_RATES], *pos;
122 	u16 rates_size, supp_rates_size, ext_rates_size;
123 
124 	memset(rates, 0, sizeof(rates));
125 	rates_size = mwifiex_get_supported_rates(priv, rates);
126 
127 	supp_rates_size = min_t(u16, rates_size, MWIFIEX_TDLS_SUPPORTED_RATES);
128 
129 	if (skb_tailroom(skb) < rates_size + 4) {
130 		mwifiex_dbg(priv->adapter, ERROR,
131 			    "Insufficient space while adding rates\n");
132 		return -ENOMEM;
133 	}
134 
135 	pos = skb_put(skb, supp_rates_size + 2);
136 	*pos++ = WLAN_EID_SUPP_RATES;
137 	*pos++ = supp_rates_size;
138 	memcpy(pos, rates, supp_rates_size);
139 
140 	if (rates_size > MWIFIEX_TDLS_SUPPORTED_RATES) {
141 		ext_rates_size = rates_size - MWIFIEX_TDLS_SUPPORTED_RATES;
142 		pos = skb_put(skb, ext_rates_size + 2);
143 		*pos++ = WLAN_EID_EXT_SUPP_RATES;
144 		*pos++ = ext_rates_size;
145 		memcpy(pos, rates + MWIFIEX_TDLS_SUPPORTED_RATES,
146 		       ext_rates_size);
147 	}
148 
149 	return 0;
150 }
151 
152 static void mwifiex_tdls_add_aid(struct mwifiex_private *priv,
153 				struct sk_buff *skb)
154 {
155 	struct ieee_types_assoc_rsp *assoc_rsp;
156 	u8 *pos;
157 
158 	assoc_rsp = (struct ieee_types_assoc_rsp *)&priv->assoc_rsp_buf;
159 	pos = skb_put(skb, 4);
160 	*pos++ = WLAN_EID_AID;
161 	*pos++ = 2;
162 	memcpy(pos, &assoc_rsp->a_id, sizeof(assoc_rsp->a_id));
163 
164 	return;
165 }
166 
167 static int mwifiex_tdls_add_vht_capab(struct mwifiex_private *priv,
168 				      struct sk_buff *skb)
169 {
170 	struct ieee80211_vht_cap vht_cap;
171 	u8 *pos;
172 
173 	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
174 	*pos++ = WLAN_EID_VHT_CAPABILITY;
175 	*pos++ = sizeof(struct ieee80211_vht_cap);
176 
177 	memset(&vht_cap, 0, sizeof(struct ieee80211_vht_cap));
178 
179 	mwifiex_fill_vht_cap_tlv(priv, &vht_cap, priv->curr_bss_params.band);
180 	memcpy(pos, &vht_cap, sizeof(vht_cap));
181 
182 	return 0;
183 }
184 
185 static int
186 mwifiex_tdls_add_ht_oper(struct mwifiex_private *priv, const u8 *mac,
187 			 u8 vht_enabled, struct sk_buff *skb)
188 {
189 	struct ieee80211_ht_operation *ht_oper;
190 	struct mwifiex_sta_node *sta_ptr;
191 	struct mwifiex_bssdescriptor *bss_desc =
192 					&priv->curr_bss_params.bss_descriptor;
193 	u8 *pos;
194 
195 	sta_ptr = mwifiex_get_sta_entry(priv, mac);
196 	if (unlikely(!sta_ptr)) {
197 		mwifiex_dbg(priv->adapter, ERROR,
198 			    "TDLS peer station not found in list\n");
199 		return -1;
200 	}
201 
202 	if (!(le16_to_cpu(sta_ptr->tdls_cap.ht_capb.cap_info))) {
203 		mwifiex_dbg(priv->adapter, WARN,
204 			    "TDLS peer doesn't support ht capabilities\n");
205 		return 0;
206 	}
207 
208 	pos = skb_put(skb, sizeof(struct ieee80211_ht_operation) + 2);
209 	*pos++ = WLAN_EID_HT_OPERATION;
210 	*pos++ = sizeof(struct ieee80211_ht_operation);
211 	ht_oper = (void *)pos;
212 
213 	ht_oper->primary_chan = bss_desc->channel;
214 
215 	/* follow AP's channel bandwidth */
216 	if (ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&
217 	    bss_desc->bcn_ht_cap &&
218 	    ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_oper->ht_param))
219 		ht_oper->ht_param = bss_desc->bcn_ht_oper->ht_param;
220 
221 	if (vht_enabled) {
222 		ht_oper->ht_param =
223 			  mwifiex_get_sec_chan_offset(bss_desc->channel);
224 		ht_oper->ht_param |= BIT(2);
225 	}
226 
227 	memcpy(&sta_ptr->tdls_cap.ht_oper, ht_oper,
228 	       sizeof(struct ieee80211_ht_operation));
229 
230 	return 0;
231 }
232 
233 static int mwifiex_tdls_add_vht_oper(struct mwifiex_private *priv,
234 				     const u8 *mac, struct sk_buff *skb)
235 {
236 	struct mwifiex_bssdescriptor *bss_desc;
237 	struct ieee80211_vht_operation *vht_oper;
238 	struct ieee80211_vht_cap *vht_cap, *ap_vht_cap = NULL;
239 	struct mwifiex_sta_node *sta_ptr;
240 	struct mwifiex_adapter *adapter = priv->adapter;
241 	u8 supp_chwd_set, peer_supp_chwd_set;
242 	u8 *pos, ap_supp_chwd_set, chan_bw;
243 	u16 mcs_map_user, mcs_map_resp, mcs_map_result;
244 	u16 mcs_user, mcs_resp, nss;
245 	u32 usr_vht_cap_info;
246 
247 	bss_desc = &priv->curr_bss_params.bss_descriptor;
248 
249 	sta_ptr = mwifiex_get_sta_entry(priv, mac);
250 	if (unlikely(!sta_ptr)) {
251 		mwifiex_dbg(adapter, ERROR,
252 			    "TDLS peer station not found in list\n");
253 		return -1;
254 	}
255 
256 	if (!(le32_to_cpu(sta_ptr->tdls_cap.vhtcap.vht_cap_info))) {
257 		mwifiex_dbg(adapter, WARN,
258 			    "TDLS peer doesn't support vht capabilities\n");
259 		return 0;
260 	}
261 
262 	if (!mwifiex_is_bss_in_11ac_mode(priv)) {
263 		if (sta_ptr->tdls_cap.extcap.ext_capab[7] &
264 		   WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
265 			mwifiex_dbg(adapter, WARN,
266 				    "TDLS peer doesn't support wider bandwidth\n");
267 			return 0;
268 		}
269 	} else {
270 		ap_vht_cap = bss_desc->bcn_vht_cap;
271 	}
272 
273 	pos = skb_put(skb, sizeof(struct ieee80211_vht_operation) + 2);
274 	*pos++ = WLAN_EID_VHT_OPERATION;
275 	*pos++ = sizeof(struct ieee80211_vht_operation);
276 	vht_oper = (struct ieee80211_vht_operation *)pos;
277 
278 	if (bss_desc->bss_band & BAND_A)
279 		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
280 	else
281 		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
282 
283 	/* find the minimum bandwidth between AP/TDLS peers */
284 	vht_cap = &sta_ptr->tdls_cap.vhtcap;
285 	supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);
286 	peer_supp_chwd_set =
287 			 GET_VHTCAP_CHWDSET(le32_to_cpu(vht_cap->vht_cap_info));
288 	supp_chwd_set = min_t(u8, supp_chwd_set, peer_supp_chwd_set);
289 
290 	/* We need check AP's bandwidth when TDLS_WIDER_BANDWIDTH is off */
291 
292 	if (ap_vht_cap && sta_ptr->tdls_cap.extcap.ext_capab[7] &
293 	    WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
294 		ap_supp_chwd_set =
295 		      GET_VHTCAP_CHWDSET(le32_to_cpu(ap_vht_cap->vht_cap_info));
296 		supp_chwd_set = min_t(u8, supp_chwd_set, ap_supp_chwd_set);
297 	}
298 
299 	switch (supp_chwd_set) {
300 	case IEEE80211_VHT_CHANWIDTH_80MHZ:
301 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
302 		break;
303 	case IEEE80211_VHT_CHANWIDTH_160MHZ:
304 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
305 		break;
306 	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
307 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
308 		break;
309 	default:
310 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
311 		break;
312 	}
313 
314 	mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
315 	mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.rx_mcs_map);
316 	mcs_map_result = 0;
317 
318 	for (nss = 1; nss <= 8; nss++) {
319 		mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
320 		mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
321 
322 		if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) ||
323 		    (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED))
324 			SET_VHTNSSMCS(mcs_map_result, nss,
325 				      IEEE80211_VHT_MCS_NOT_SUPPORTED);
326 		else
327 			SET_VHTNSSMCS(mcs_map_result, nss,
328 				      min_t(u16, mcs_user, mcs_resp));
329 	}
330 
331 	vht_oper->basic_mcs_set = cpu_to_le16(mcs_map_result);
332 
333 	switch (vht_oper->chan_width) {
334 	case IEEE80211_VHT_CHANWIDTH_80MHZ:
335 		chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
336 		break;
337 	case IEEE80211_VHT_CHANWIDTH_160MHZ:
338 		chan_bw = IEEE80211_VHT_CHANWIDTH_160MHZ;
339 		break;
340 	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
341 		chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
342 		break;
343 	default:
344 		chan_bw = IEEE80211_VHT_CHANWIDTH_USE_HT;
345 		break;
346 	}
347 	vht_oper->center_freq_seg0_idx =
348 			mwifiex_get_center_freq_index(priv, BAND_AAC,
349 						      bss_desc->channel,
350 						      chan_bw);
351 
352 	return 0;
353 }
354 
355 static void mwifiex_tdls_add_ext_capab(struct mwifiex_private *priv,
356 				       struct sk_buff *skb)
357 {
358 	struct ieee_types_extcap *extcap;
359 
360 	extcap = skb_put(skb, sizeof(struct ieee_types_extcap));
361 	extcap->ieee_hdr.element_id = WLAN_EID_EXT_CAPABILITY;
362 	extcap->ieee_hdr.len = 8;
363 	memset(extcap->ext_capab, 0, 8);
364 	extcap->ext_capab[4] |= WLAN_EXT_CAPA5_TDLS_ENABLED;
365 	extcap->ext_capab[3] |= WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH;
366 
367 	if (priv->adapter->is_hw_11ac_capable)
368 		extcap->ext_capab[7] |= WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED;
369 }
370 
371 static void mwifiex_tdls_add_qos_capab(struct sk_buff *skb)
372 {
373 	u8 *pos = skb_put(skb, 3);
374 
375 	*pos++ = WLAN_EID_QOS_CAPA;
376 	*pos++ = 1;
377 	*pos++ = MWIFIEX_TDLS_DEF_QOS_CAPAB;
378 }
379 
380 static void
381 mwifiex_tdls_add_wmm_param_ie(struct mwifiex_private *priv, struct sk_buff *skb)
382 {
383 	struct ieee80211_wmm_param_ie *wmm;
384 	u8 ac_vi[] = {0x42, 0x43, 0x5e, 0x00};
385 	u8 ac_vo[] = {0x62, 0x32, 0x2f, 0x00};
386 	u8 ac_be[] = {0x03, 0xa4, 0x00, 0x00};
387 	u8 ac_bk[] = {0x27, 0xa4, 0x00, 0x00};
388 
389 	wmm = skb_put_zero(skb, sizeof(*wmm));
390 
391 	wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
392 	wmm->len = sizeof(*wmm) - 2;
393 	wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
394 	wmm->oui[1] = 0x50;
395 	wmm->oui[2] = 0xf2;
396 	wmm->oui_type = 2; /* WME */
397 	wmm->oui_subtype = 1; /* WME param */
398 	wmm->version = 1; /* WME ver */
399 	wmm->qos_info = 0; /* U-APSD not in use */
400 
401 	/* use default WMM AC parameters for TDLS link*/
402 	memcpy(&wmm->ac[0], ac_be, sizeof(ac_be));
403 	memcpy(&wmm->ac[1], ac_bk, sizeof(ac_bk));
404 	memcpy(&wmm->ac[2], ac_vi, sizeof(ac_vi));
405 	memcpy(&wmm->ac[3], ac_vo, sizeof(ac_vo));
406 }
407 
408 static void
409 mwifiex_add_wmm_info_ie(struct mwifiex_private *priv, struct sk_buff *skb,
410 			u8 qosinfo)
411 {
412 	u8 *buf;
413 
414 	buf = skb_put(skb,
415 		      MWIFIEX_TDLS_WMM_INFO_SIZE + sizeof(struct ieee_types_header));
416 
417 	*buf++ = WLAN_EID_VENDOR_SPECIFIC;
418 	*buf++ = 7; /* len */
419 	*buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
420 	*buf++ = 0x50;
421 	*buf++ = 0xf2;
422 	*buf++ = 2; /* WME */
423 	*buf++ = 0; /* WME info */
424 	*buf++ = 1; /* WME ver */
425 	*buf++ = qosinfo; /* U-APSD no in use */
426 }
427 
428 static void mwifiex_tdls_add_bss_co_2040(struct sk_buff *skb)
429 {
430 	struct ieee_types_bss_co_2040 *bssco;
431 
432 	bssco = skb_put(skb, sizeof(struct ieee_types_bss_co_2040));
433 	bssco->ieee_hdr.element_id = WLAN_EID_BSS_COEX_2040;
434 	bssco->ieee_hdr.len = sizeof(struct ieee_types_bss_co_2040) -
435 			      sizeof(struct ieee_types_header);
436 	bssco->bss_2040co = 0x01;
437 }
438 
439 static void mwifiex_tdls_add_supported_chan(struct sk_buff *skb)
440 {
441 	struct ieee_types_generic *supp_chan;
442 	u8 chan_supp[] = {1, 11};
443 
444 	supp_chan = skb_put(skb,
445 			    (sizeof(struct ieee_types_header) + sizeof(chan_supp)));
446 	supp_chan->ieee_hdr.element_id = WLAN_EID_SUPPORTED_CHANNELS;
447 	supp_chan->ieee_hdr.len = sizeof(chan_supp);
448 	memcpy(supp_chan->data, chan_supp, sizeof(chan_supp));
449 }
450 
451 static void mwifiex_tdls_add_oper_class(struct sk_buff *skb)
452 {
453 	struct ieee_types_generic *reg_class;
454 	u8 rc_list[] = {1,
455 		1, 2, 3, 4, 12, 22, 23, 24, 25, 27, 28, 29, 30, 32, 33};
456 	reg_class = skb_put(skb,
457 			    (sizeof(struct ieee_types_header) + sizeof(rc_list)));
458 	reg_class->ieee_hdr.element_id = WLAN_EID_SUPPORTED_REGULATORY_CLASSES;
459 	reg_class->ieee_hdr.len = sizeof(rc_list);
460 	memcpy(reg_class->data, rc_list, sizeof(rc_list));
461 }
462 
463 static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
464 					const u8 *peer, u8 action_code,
465 					u8 dialog_token,
466 					u16 status_code, struct sk_buff *skb)
467 {
468 	struct ieee80211_tdls_data *tf;
469 	int ret;
470 	u16 capab;
471 	struct ieee80211_ht_cap *ht_cap;
472 	u8 radio, *pos;
473 
474 	capab = priv->curr_bss_params.bss_descriptor.cap_info_bitmap;
475 
476 	tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
477 	memcpy(tf->da, peer, ETH_ALEN);
478 	memcpy(tf->sa, priv->curr_addr, ETH_ALEN);
479 	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
480 	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
481 
482 	switch (action_code) {
483 	case WLAN_TDLS_SETUP_REQUEST:
484 		tf->category = WLAN_CATEGORY_TDLS;
485 		tf->action_code = WLAN_TDLS_SETUP_REQUEST;
486 		skb_put(skb, sizeof(tf->u.setup_req));
487 		tf->u.setup_req.dialog_token = dialog_token;
488 		tf->u.setup_req.capability = cpu_to_le16(capab);
489 		ret = mwifiex_tdls_append_rates_ie(priv, skb);
490 		if (ret) {
491 			dev_kfree_skb_any(skb);
492 			return ret;
493 		}
494 
495 		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
496 		*pos++ = WLAN_EID_HT_CAPABILITY;
497 		*pos++ = sizeof(struct ieee80211_ht_cap);
498 		ht_cap = (void *)pos;
499 		radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
500 		ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
501 		if (ret) {
502 			dev_kfree_skb_any(skb);
503 			return ret;
504 		}
505 
506 		if (priv->adapter->is_hw_11ac_capable) {
507 			ret = mwifiex_tdls_add_vht_capab(priv, skb);
508 			if (ret) {
509 				dev_kfree_skb_any(skb);
510 				return ret;
511 			}
512 			mwifiex_tdls_add_aid(priv, skb);
513 		}
514 
515 		mwifiex_tdls_add_ext_capab(priv, skb);
516 		mwifiex_tdls_add_bss_co_2040(skb);
517 		mwifiex_tdls_add_supported_chan(skb);
518 		mwifiex_tdls_add_oper_class(skb);
519 		mwifiex_add_wmm_info_ie(priv, skb, 0);
520 		break;
521 
522 	case WLAN_TDLS_SETUP_RESPONSE:
523 		tf->category = WLAN_CATEGORY_TDLS;
524 		tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
525 		skb_put(skb, sizeof(tf->u.setup_resp));
526 		tf->u.setup_resp.status_code = cpu_to_le16(status_code);
527 		tf->u.setup_resp.dialog_token = dialog_token;
528 		tf->u.setup_resp.capability = cpu_to_le16(capab);
529 		ret = mwifiex_tdls_append_rates_ie(priv, skb);
530 		if (ret) {
531 			dev_kfree_skb_any(skb);
532 			return ret;
533 		}
534 
535 		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
536 		*pos++ = WLAN_EID_HT_CAPABILITY;
537 		*pos++ = sizeof(struct ieee80211_ht_cap);
538 		ht_cap = (void *)pos;
539 		radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
540 		ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
541 		if (ret) {
542 			dev_kfree_skb_any(skb);
543 			return ret;
544 		}
545 
546 		if (priv->adapter->is_hw_11ac_capable) {
547 			ret = mwifiex_tdls_add_vht_capab(priv, skb);
548 			if (ret) {
549 				dev_kfree_skb_any(skb);
550 				return ret;
551 			}
552 			mwifiex_tdls_add_aid(priv, skb);
553 		}
554 
555 		mwifiex_tdls_add_ext_capab(priv, skb);
556 		mwifiex_tdls_add_bss_co_2040(skb);
557 		mwifiex_tdls_add_supported_chan(skb);
558 		mwifiex_tdls_add_oper_class(skb);
559 		mwifiex_add_wmm_info_ie(priv, skb, 0);
560 		break;
561 
562 	case WLAN_TDLS_SETUP_CONFIRM:
563 		tf->category = WLAN_CATEGORY_TDLS;
564 		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
565 		skb_put(skb, sizeof(tf->u.setup_cfm));
566 		tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
567 		tf->u.setup_cfm.dialog_token = dialog_token;
568 
569 		mwifiex_tdls_add_wmm_param_ie(priv, skb);
570 		if (priv->adapter->is_hw_11ac_capable) {
571 			ret = mwifiex_tdls_add_vht_oper(priv, peer, skb);
572 			if (ret) {
573 				dev_kfree_skb_any(skb);
574 				return ret;
575 			}
576 			ret = mwifiex_tdls_add_ht_oper(priv, peer, 1, skb);
577 			if (ret) {
578 				dev_kfree_skb_any(skb);
579 				return ret;
580 			}
581 		} else {
582 			ret = mwifiex_tdls_add_ht_oper(priv, peer, 0, skb);
583 			if (ret) {
584 				dev_kfree_skb_any(skb);
585 				return ret;
586 			}
587 		}
588 		break;
589 
590 	case WLAN_TDLS_TEARDOWN:
591 		tf->category = WLAN_CATEGORY_TDLS;
592 		tf->action_code = WLAN_TDLS_TEARDOWN;
593 		skb_put(skb, sizeof(tf->u.teardown));
594 		tf->u.teardown.reason_code = cpu_to_le16(status_code);
595 		break;
596 
597 	case WLAN_TDLS_DISCOVERY_REQUEST:
598 		tf->category = WLAN_CATEGORY_TDLS;
599 		tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
600 		skb_put(skb, sizeof(tf->u.discover_req));
601 		tf->u.discover_req.dialog_token = dialog_token;
602 		break;
603 	default:
604 		mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS frame type.\n");
605 		return -EINVAL;
606 	}
607 
608 	return 0;
609 }
610 
611 static void
612 mwifiex_tdls_add_link_ie(struct sk_buff *skb, const u8 *src_addr,
613 			 const u8 *peer, const u8 *bssid)
614 {
615 	struct ieee80211_tdls_lnkie *lnkid;
616 
617 	lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
618 	lnkid->ie_type = WLAN_EID_LINK_ID;
619 	lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) -
620 			sizeof(struct ieee_types_header);
621 
622 	memcpy(lnkid->bssid, bssid, ETH_ALEN);
623 	memcpy(lnkid->init_sta, src_addr, ETH_ALEN);
624 	memcpy(lnkid->resp_sta, peer, ETH_ALEN);
625 }
626 
627 int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv, const u8 *peer,
628 				 u8 action_code, u8 dialog_token,
629 				 u16 status_code, const u8 *extra_ies,
630 				 size_t extra_ies_len)
631 {
632 	struct sk_buff *skb;
633 	struct mwifiex_txinfo *tx_info;
634 	int ret;
635 	u16 skb_len;
636 
637 	skb_len = MWIFIEX_MIN_DATA_HEADER_LEN +
638 		  max(sizeof(struct ieee80211_mgmt),
639 		      sizeof(struct ieee80211_tdls_data)) +
640 		  MWIFIEX_MGMT_FRAME_HEADER_SIZE +
641 		  MWIFIEX_SUPPORTED_RATES +
642 		  3 + /* Qos Info */
643 		  sizeof(struct ieee_types_extcap) +
644 		  sizeof(struct ieee80211_ht_cap) +
645 		  sizeof(struct ieee_types_bss_co_2040) +
646 		  sizeof(struct ieee80211_ht_operation) +
647 		  sizeof(struct ieee80211_tdls_lnkie) +
648 		  (2 * (sizeof(struct ieee_types_header))) +
649 		   MWIFIEX_SUPPORTED_CHANNELS +
650 		   MWIFIEX_OPERATING_CLASSES +
651 		  sizeof(struct ieee80211_wmm_param_ie) +
652 		  extra_ies_len;
653 
654 	if (priv->adapter->is_hw_11ac_capable)
655 		skb_len += sizeof(struct ieee_types_vht_cap) +
656 			   sizeof(struct ieee_types_vht_oper) +
657 			   sizeof(struct ieee_types_aid);
658 
659 	skb = dev_alloc_skb(skb_len);
660 	if (!skb) {
661 		mwifiex_dbg(priv->adapter, ERROR,
662 			    "allocate skb failed for management frame\n");
663 		return -ENOMEM;
664 	}
665 	skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
666 
667 	switch (action_code) {
668 	case WLAN_TDLS_SETUP_REQUEST:
669 	case WLAN_TDLS_SETUP_CONFIRM:
670 	case WLAN_TDLS_TEARDOWN:
671 	case WLAN_TDLS_DISCOVERY_REQUEST:
672 		ret = mwifiex_prep_tdls_encap_data(priv, peer, action_code,
673 						   dialog_token, status_code,
674 						   skb);
675 		if (ret) {
676 			dev_kfree_skb_any(skb);
677 			return ret;
678 		}
679 		if (extra_ies_len)
680 			skb_put_data(skb, extra_ies, extra_ies_len);
681 		mwifiex_tdls_add_link_ie(skb, priv->curr_addr, peer,
682 					 priv->cfg_bssid);
683 		break;
684 	case WLAN_TDLS_SETUP_RESPONSE:
685 		ret = mwifiex_prep_tdls_encap_data(priv, peer, action_code,
686 						   dialog_token, status_code,
687 						   skb);
688 		if (ret) {
689 			dev_kfree_skb_any(skb);
690 			return ret;
691 		}
692 		if (extra_ies_len)
693 			skb_put_data(skb, extra_ies, extra_ies_len);
694 		mwifiex_tdls_add_link_ie(skb, peer, priv->curr_addr,
695 					 priv->cfg_bssid);
696 		break;
697 	}
698 
699 	switch (action_code) {
700 	case WLAN_TDLS_SETUP_REQUEST:
701 	case WLAN_TDLS_SETUP_RESPONSE:
702 		skb->priority = MWIFIEX_PRIO_BK;
703 		break;
704 	default:
705 		skb->priority = MWIFIEX_PRIO_VI;
706 		break;
707 	}
708 
709 	tx_info = MWIFIEX_SKB_TXCB(skb);
710 	memset(tx_info, 0, sizeof(*tx_info));
711 	tx_info->bss_num = priv->bss_num;
712 	tx_info->bss_type = priv->bss_type;
713 
714 	__net_timestamp(skb);
715 	mwifiex_queue_tx_pkt(priv, skb);
716 
717 	/* Delay 10ms to make sure tdls setup confirm/teardown frame
718 	 * is received by peer
719 	*/
720 	if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
721 	    action_code == WLAN_TDLS_TEARDOWN)
722 		msleep_interruptible(10);
723 
724 	return 0;
725 }
726 
727 static int
728 mwifiex_construct_tdls_action_frame(struct mwifiex_private *priv,
729 				    const u8 *peer,
730 				    u8 action_code, u8 dialog_token,
731 				    u16 status_code, struct sk_buff *skb)
732 {
733 	struct ieee80211_mgmt *mgmt;
734 	int ret;
735 	u16 capab;
736 	struct ieee80211_ht_cap *ht_cap;
737 	u8 radio, *pos;
738 
739 	capab = priv->curr_bss_params.bss_descriptor.cap_info_bitmap;
740 
741 	mgmt = skb_put(skb, offsetof(struct ieee80211_mgmt, u));
742 
743 	memset(mgmt, 0, 24);
744 	memcpy(mgmt->da, peer, ETH_ALEN);
745 	memcpy(mgmt->sa, priv->curr_addr, ETH_ALEN);
746 	memcpy(mgmt->bssid, priv->cfg_bssid, ETH_ALEN);
747 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
748 					  IEEE80211_STYPE_ACTION);
749 
750 	/* add address 4 */
751 	pos = skb_put(skb, ETH_ALEN);
752 
753 	switch (action_code) {
754 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
755 		skb_put(skb, sizeof(mgmt->u.action.u.tdls_discover_resp) + 1);
756 		mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
757 		mgmt->u.action.u.tdls_discover_resp.action_code =
758 					      WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
759 		mgmt->u.action.u.tdls_discover_resp.dialog_token =
760 								   dialog_token;
761 		mgmt->u.action.u.tdls_discover_resp.capability =
762 							     cpu_to_le16(capab);
763 		/* move back for addr4 */
764 		memmove(pos + ETH_ALEN, &mgmt->u.action.category,
765 			sizeof(mgmt->u.action.u.tdls_discover_resp));
766 		/* init address 4 */
767 		eth_broadcast_addr(pos);
768 
769 		ret = mwifiex_tdls_append_rates_ie(priv, skb);
770 		if (ret) {
771 			dev_kfree_skb_any(skb);
772 			return ret;
773 		}
774 
775 		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
776 		*pos++ = WLAN_EID_HT_CAPABILITY;
777 		*pos++ = sizeof(struct ieee80211_ht_cap);
778 		ht_cap = (void *)pos;
779 		radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
780 		ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
781 		if (ret) {
782 			dev_kfree_skb_any(skb);
783 			return ret;
784 		}
785 
786 		if (priv->adapter->is_hw_11ac_capable) {
787 			ret = mwifiex_tdls_add_vht_capab(priv, skb);
788 			if (ret) {
789 				dev_kfree_skb_any(skb);
790 				return ret;
791 			}
792 			mwifiex_tdls_add_aid(priv, skb);
793 		}
794 
795 		mwifiex_tdls_add_ext_capab(priv, skb);
796 		mwifiex_tdls_add_bss_co_2040(skb);
797 		mwifiex_tdls_add_supported_chan(skb);
798 		mwifiex_tdls_add_qos_capab(skb);
799 		mwifiex_tdls_add_oper_class(skb);
800 		break;
801 	default:
802 		mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS action frame type\n");
803 		return -EINVAL;
804 	}
805 
806 	return 0;
807 }
808 
809 int mwifiex_send_tdls_action_frame(struct mwifiex_private *priv, const u8 *peer,
810 				   u8 action_code, u8 dialog_token,
811 				   u16 status_code, const u8 *extra_ies,
812 				   size_t extra_ies_len)
813 {
814 	struct sk_buff *skb;
815 	struct mwifiex_txinfo *tx_info;
816 	u8 *pos;
817 	u32 pkt_type, tx_control;
818 	u16 pkt_len, skb_len;
819 
820 	skb_len = MWIFIEX_MIN_DATA_HEADER_LEN +
821 		  max(sizeof(struct ieee80211_mgmt),
822 		      sizeof(struct ieee80211_tdls_data)) +
823 		  MWIFIEX_MGMT_FRAME_HEADER_SIZE +
824 		  MWIFIEX_SUPPORTED_RATES +
825 		  sizeof(struct ieee_types_extcap) +
826 		  sizeof(struct ieee80211_ht_cap) +
827 		  sizeof(struct ieee_types_bss_co_2040) +
828 		  sizeof(struct ieee80211_ht_operation) +
829 		  sizeof(struct ieee80211_tdls_lnkie) +
830 		  extra_ies_len +
831 		  3 + /* Qos Info */
832 		  ETH_ALEN; /* Address4 */
833 
834 	if (priv->adapter->is_hw_11ac_capable)
835 		skb_len += sizeof(struct ieee_types_vht_cap) +
836 			   sizeof(struct ieee_types_vht_oper) +
837 			   sizeof(struct ieee_types_aid);
838 
839 	skb = dev_alloc_skb(skb_len);
840 	if (!skb) {
841 		mwifiex_dbg(priv->adapter, ERROR,
842 			    "allocate skb failed for management frame\n");
843 		return -ENOMEM;
844 	}
845 
846 	skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
847 
848 	pkt_type = PKT_TYPE_MGMT;
849 	tx_control = 0;
850 	pos = skb_put_zero(skb,
851 			   MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(pkt_len));
852 	memcpy(pos, &pkt_type, sizeof(pkt_type));
853 	memcpy(pos + sizeof(pkt_type), &tx_control, sizeof(tx_control));
854 
855 	if (mwifiex_construct_tdls_action_frame(priv, peer, action_code,
856 						dialog_token, status_code,
857 						skb)) {
858 		dev_kfree_skb_any(skb);
859 		return -EINVAL;
860 	}
861 
862 	if (extra_ies_len)
863 		skb_put_data(skb, extra_ies, extra_ies_len);
864 
865 	/* the TDLS link IE is always added last we are the responder */
866 
867 	mwifiex_tdls_add_link_ie(skb, peer, priv->curr_addr,
868 				 priv->cfg_bssid);
869 
870 	skb->priority = MWIFIEX_PRIO_VI;
871 
872 	tx_info = MWIFIEX_SKB_TXCB(skb);
873 	memset(tx_info, 0, sizeof(*tx_info));
874 	tx_info->bss_num = priv->bss_num;
875 	tx_info->bss_type = priv->bss_type;
876 	tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
877 
878 	pkt_len = skb->len - MWIFIEX_MGMT_FRAME_HEADER_SIZE - sizeof(pkt_len);
879 	memcpy(skb->data + MWIFIEX_MGMT_FRAME_HEADER_SIZE, &pkt_len,
880 	       sizeof(pkt_len));
881 	__net_timestamp(skb);
882 	mwifiex_queue_tx_pkt(priv, skb);
883 
884 	return 0;
885 }
886 
887 /* This function process tdls action frame from peer.
888  * Peer capabilities are stored into station node structure.
889  */
890 void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
891 				       u8 *buf, int len)
892 {
893 	struct mwifiex_sta_node *sta_ptr;
894 	u8 *peer, *pos, *end;
895 	u8 i, action, basic;
896 	u16 cap = 0;
897 	int ies_len = 0;
898 
899 	if (len < (sizeof(struct ethhdr) + 3))
900 		return;
901 	if (*(buf + sizeof(struct ethhdr)) != WLAN_TDLS_SNAP_RFTYPE)
902 		return;
903 	if (*(buf + sizeof(struct ethhdr) + 1) != WLAN_CATEGORY_TDLS)
904 		return;
905 
906 	peer = buf + ETH_ALEN;
907 	action = *(buf + sizeof(struct ethhdr) + 2);
908 	mwifiex_dbg(priv->adapter, DATA,
909 		    "rx:tdls action: peer=%pM, action=%d\n", peer, action);
910 
911 	switch (action) {
912 	case WLAN_TDLS_SETUP_REQUEST:
913 		if (len < (sizeof(struct ethhdr) + TDLS_REQ_FIX_LEN))
914 			return;
915 
916 		pos = buf + sizeof(struct ethhdr) + 4;
917 		/* payload 1+ category 1 + action 1 + dialog 1 */
918 		cap = get_unaligned_le16(pos);
919 		ies_len = len - sizeof(struct ethhdr) - TDLS_REQ_FIX_LEN;
920 		pos += 2;
921 		break;
922 
923 	case WLAN_TDLS_SETUP_RESPONSE:
924 		if (len < (sizeof(struct ethhdr) + TDLS_RESP_FIX_LEN))
925 			return;
926 		/* payload 1+ category 1 + action 1 + dialog 1 + status code 2*/
927 		pos = buf + sizeof(struct ethhdr) + 6;
928 		cap = get_unaligned_le16(pos);
929 		ies_len = len - sizeof(struct ethhdr) - TDLS_RESP_FIX_LEN;
930 		pos += 2;
931 		break;
932 
933 	case WLAN_TDLS_SETUP_CONFIRM:
934 		if (len < (sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN))
935 			return;
936 		pos = buf + sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN;
937 		ies_len = len - sizeof(struct ethhdr) - TDLS_CONFIRM_FIX_LEN;
938 		break;
939 	default:
940 		mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS frame type.\n");
941 		return;
942 	}
943 
944 	sta_ptr = mwifiex_add_sta_entry(priv, peer);
945 	if (!sta_ptr)
946 		return;
947 
948 	sta_ptr->tdls_cap.capab = cpu_to_le16(cap);
949 
950 	for (end = pos + ies_len; pos + 1 < end; pos += 2 + pos[1]) {
951 		u8 ie_len = pos[1];
952 
953 		if (pos + 2 + ie_len > end)
954 			break;
955 
956 		switch (*pos) {
957 		case WLAN_EID_SUPP_RATES:
958 			if (ie_len > sizeof(sta_ptr->tdls_cap.rates))
959 				return;
960 			sta_ptr->tdls_cap.rates_len = ie_len;
961 			for (i = 0; i < ie_len; i++)
962 				sta_ptr->tdls_cap.rates[i] = pos[i + 2];
963 			break;
964 
965 		case WLAN_EID_EXT_SUPP_RATES:
966 			if (ie_len > sizeof(sta_ptr->tdls_cap.rates))
967 				return;
968 			basic = sta_ptr->tdls_cap.rates_len;
969 			if (ie_len > sizeof(sta_ptr->tdls_cap.rates) - basic)
970 				return;
971 			for (i = 0; i < ie_len; i++)
972 				sta_ptr->tdls_cap.rates[basic + i] = pos[i + 2];
973 			sta_ptr->tdls_cap.rates_len += ie_len;
974 			break;
975 		case WLAN_EID_HT_CAPABILITY:
976 			if (ie_len != sizeof(struct ieee80211_ht_cap))
977 				return;
978 			/* copy the ie's value into ht_capb*/
979 			memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos + 2,
980 			       sizeof(struct ieee80211_ht_cap));
981 			sta_ptr->is_11n_enabled = 1;
982 			break;
983 		case WLAN_EID_HT_OPERATION:
984 			if (ie_len != sizeof(struct ieee80211_ht_operation))
985 				return;
986 			/* copy the ie's value into ht_oper*/
987 			memcpy(&sta_ptr->tdls_cap.ht_oper, pos + 2,
988 			       sizeof(struct ieee80211_ht_operation));
989 			break;
990 		case WLAN_EID_BSS_COEX_2040:
991 			if (ie_len != sizeof(pos[2]))
992 				return;
993 			sta_ptr->tdls_cap.coex_2040 = pos[2];
994 			break;
995 		case WLAN_EID_EXT_CAPABILITY:
996 			if (ie_len < sizeof(struct ieee_types_header))
997 				return;
998 			if (ie_len > 8)
999 				return;
1000 			memcpy((u8 *)&sta_ptr->tdls_cap.extcap, pos,
1001 			       sizeof(struct ieee_types_header) +
1002 			       min_t(u8, ie_len, 8));
1003 			break;
1004 		case WLAN_EID_RSN:
1005 			if (ie_len < sizeof(struct ieee_types_header))
1006 				return;
1007 			if (ie_len > IEEE_MAX_IE_SIZE -
1008 			    sizeof(struct ieee_types_header))
1009 				return;
1010 			memcpy((u8 *)&sta_ptr->tdls_cap.rsn_ie, pos,
1011 			       sizeof(struct ieee_types_header) +
1012 			       min_t(u8, ie_len, IEEE_MAX_IE_SIZE -
1013 				     sizeof(struct ieee_types_header)));
1014 			break;
1015 		case WLAN_EID_QOS_CAPA:
1016 			if (ie_len != sizeof(pos[2]))
1017 				return;
1018 			sta_ptr->tdls_cap.qos_info = pos[2];
1019 			break;
1020 		case WLAN_EID_VHT_OPERATION:
1021 			if (priv->adapter->is_hw_11ac_capable) {
1022 				if (ie_len !=
1023 				    sizeof(struct ieee80211_vht_operation))
1024 					return;
1025 				/* copy the ie's value into vhtoper*/
1026 				memcpy(&sta_ptr->tdls_cap.vhtoper, pos + 2,
1027 				       sizeof(struct ieee80211_vht_operation));
1028 			}
1029 			break;
1030 		case WLAN_EID_VHT_CAPABILITY:
1031 			if (priv->adapter->is_hw_11ac_capable) {
1032 				if (ie_len != sizeof(struct ieee80211_vht_cap))
1033 					return;
1034 				/* copy the ie's value into vhtcap*/
1035 				memcpy((u8 *)&sta_ptr->tdls_cap.vhtcap, pos + 2,
1036 				       sizeof(struct ieee80211_vht_cap));
1037 				sta_ptr->is_11ac_enabled = 1;
1038 			}
1039 			break;
1040 		case WLAN_EID_AID:
1041 			if (priv->adapter->is_hw_11ac_capable) {
1042 				if (ie_len != sizeof(u16))
1043 					return;
1044 				sta_ptr->tdls_cap.aid =
1045 					get_unaligned_le16((pos + 2));
1046 			}
1047 			break;
1048 		default:
1049 			break;
1050 		}
1051 	}
1052 
1053 	return;
1054 }
1055 
1056 static int
1057 mwifiex_tdls_process_config_link(struct mwifiex_private *priv, const u8 *peer)
1058 {
1059 	struct mwifiex_sta_node *sta_ptr;
1060 	struct mwifiex_ds_tdls_oper tdls_oper;
1061 
1062 	memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1063 	sta_ptr = mwifiex_get_sta_entry(priv, peer);
1064 
1065 	if (!sta_ptr || sta_ptr->tdls_status == TDLS_SETUP_FAILURE) {
1066 		mwifiex_dbg(priv->adapter, ERROR,
1067 			    "link absent for peer %pM; cannot config\n", peer);
1068 		return -EINVAL;
1069 	}
1070 
1071 	memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
1072 	tdls_oper.tdls_action = MWIFIEX_TDLS_CONFIG_LINK;
1073 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1074 				HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
1075 }
1076 
1077 static int
1078 mwifiex_tdls_process_create_link(struct mwifiex_private *priv, const u8 *peer)
1079 {
1080 	struct mwifiex_sta_node *sta_ptr;
1081 	struct mwifiex_ds_tdls_oper tdls_oper;
1082 
1083 	memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1084 	sta_ptr = mwifiex_get_sta_entry(priv, peer);
1085 
1086 	if (sta_ptr && sta_ptr->tdls_status == TDLS_SETUP_INPROGRESS) {
1087 		mwifiex_dbg(priv->adapter, WARN,
1088 			    "Setup already in progress for peer %pM\n", peer);
1089 		return 0;
1090 	}
1091 
1092 	sta_ptr = mwifiex_add_sta_entry(priv, peer);
1093 	if (!sta_ptr)
1094 		return -ENOMEM;
1095 
1096 	sta_ptr->tdls_status = TDLS_SETUP_INPROGRESS;
1097 	mwifiex_hold_tdls_packets(priv, peer);
1098 	memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
1099 	tdls_oper.tdls_action = MWIFIEX_TDLS_CREATE_LINK;
1100 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1101 				HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
1102 }
1103 
1104 static int
1105 mwifiex_tdls_process_disable_link(struct mwifiex_private *priv, const u8 *peer)
1106 {
1107 	struct mwifiex_sta_node *sta_ptr;
1108 	struct mwifiex_ds_tdls_oper tdls_oper;
1109 
1110 	memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1111 	sta_ptr = mwifiex_get_sta_entry(priv, peer);
1112 
1113 	if (sta_ptr) {
1114 		if (sta_ptr->is_11n_enabled) {
1115 			mwifiex_11n_cleanup_reorder_tbl(priv);
1116 			spin_lock_bh(&priv->wmm.ra_list_spinlock);
1117 			mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1118 			spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1119 		}
1120 		mwifiex_del_sta_entry(priv, peer);
1121 	}
1122 
1123 	mwifiex_restore_tdls_packets(priv, peer, TDLS_LINK_TEARDOWN);
1124 	mwifiex_auto_tdls_update_peer_status(priv, peer, TDLS_NOT_SETUP);
1125 	memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
1126 	tdls_oper.tdls_action = MWIFIEX_TDLS_DISABLE_LINK;
1127 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1128 				HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
1129 }
1130 
1131 static int
1132 mwifiex_tdls_process_enable_link(struct mwifiex_private *priv, const u8 *peer)
1133 {
1134 	struct mwifiex_sta_node *sta_ptr;
1135 	struct ieee80211_mcs_info mcs;
1136 	int i;
1137 
1138 	sta_ptr = mwifiex_get_sta_entry(priv, peer);
1139 
1140 	if (sta_ptr && (sta_ptr->tdls_status != TDLS_SETUP_FAILURE)) {
1141 		mwifiex_dbg(priv->adapter, MSG,
1142 			    "tdls: enable link %pM success\n", peer);
1143 
1144 		sta_ptr->tdls_status = TDLS_SETUP_COMPLETE;
1145 
1146 		mcs = sta_ptr->tdls_cap.ht_capb.mcs;
1147 		if (mcs.rx_mask[0] != 0xff)
1148 			sta_ptr->is_11n_enabled = true;
1149 		if (sta_ptr->is_11n_enabled) {
1150 			if (le16_to_cpu(sta_ptr->tdls_cap.ht_capb.cap_info) &
1151 			    IEEE80211_HT_CAP_MAX_AMSDU)
1152 				sta_ptr->max_amsdu =
1153 					MWIFIEX_TX_DATA_BUF_SIZE_8K;
1154 			else
1155 				sta_ptr->max_amsdu =
1156 					MWIFIEX_TX_DATA_BUF_SIZE_4K;
1157 
1158 			for (i = 0; i < MAX_NUM_TID; i++)
1159 				sta_ptr->ampdu_sta[i] =
1160 					      priv->aggr_prio_tbl[i].ampdu_user;
1161 		} else {
1162 			for (i = 0; i < MAX_NUM_TID; i++)
1163 				sta_ptr->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
1164 		}
1165 		if (sta_ptr->tdls_cap.extcap.ext_capab[3] &
1166 		    WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH) {
1167 			mwifiex_config_tdls_enable(priv);
1168 			mwifiex_config_tdls_cs_params(priv);
1169 		}
1170 
1171 		memset(sta_ptr->rx_seq, 0xff, sizeof(sta_ptr->rx_seq));
1172 		mwifiex_restore_tdls_packets(priv, peer, TDLS_SETUP_COMPLETE);
1173 		mwifiex_auto_tdls_update_peer_status(priv, peer,
1174 						     TDLS_SETUP_COMPLETE);
1175 	} else {
1176 		mwifiex_dbg(priv->adapter, ERROR,
1177 			    "tdls: enable link %pM failed\n", peer);
1178 		if (sta_ptr) {
1179 			mwifiex_11n_cleanup_reorder_tbl(priv);
1180 			spin_lock_bh(&priv->wmm.ra_list_spinlock);
1181 			mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1182 			spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1183 			mwifiex_del_sta_entry(priv, peer);
1184 		}
1185 		mwifiex_restore_tdls_packets(priv, peer, TDLS_LINK_TEARDOWN);
1186 		mwifiex_auto_tdls_update_peer_status(priv, peer,
1187 						     TDLS_NOT_SETUP);
1188 
1189 		return -1;
1190 	}
1191 
1192 	return 0;
1193 }
1194 
1195 int mwifiex_tdls_oper(struct mwifiex_private *priv, const u8 *peer, u8 action)
1196 {
1197 	switch (action) {
1198 	case MWIFIEX_TDLS_ENABLE_LINK:
1199 		return mwifiex_tdls_process_enable_link(priv, peer);
1200 	case MWIFIEX_TDLS_DISABLE_LINK:
1201 		return mwifiex_tdls_process_disable_link(priv, peer);
1202 	case MWIFIEX_TDLS_CREATE_LINK:
1203 		return mwifiex_tdls_process_create_link(priv, peer);
1204 	case MWIFIEX_TDLS_CONFIG_LINK:
1205 		return mwifiex_tdls_process_config_link(priv, peer);
1206 	}
1207 	return 0;
1208 }
1209 
1210 int mwifiex_get_tdls_link_status(struct mwifiex_private *priv, const u8 *mac)
1211 {
1212 	struct mwifiex_sta_node *sta_ptr;
1213 
1214 	sta_ptr = mwifiex_get_sta_entry(priv, mac);
1215 	if (sta_ptr)
1216 		return sta_ptr->tdls_status;
1217 
1218 	return TDLS_NOT_SETUP;
1219 }
1220 
1221 int mwifiex_get_tdls_list(struct mwifiex_private *priv,
1222 			  struct tdls_peer_info *buf)
1223 {
1224 	struct mwifiex_sta_node *sta_ptr;
1225 	struct tdls_peer_info *peer = buf;
1226 	int count = 0;
1227 
1228 	if (!ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
1229 		return 0;
1230 
1231 	/* make sure we are in station mode and connected */
1232 	if (!(priv->bss_type == MWIFIEX_BSS_TYPE_STA && priv->media_connected))
1233 		return 0;
1234 
1235 	spin_lock_bh(&priv->sta_list_spinlock);
1236 	list_for_each_entry(sta_ptr, &priv->sta_list, list) {
1237 		if (mwifiex_is_tdls_link_setup(sta_ptr->tdls_status)) {
1238 			ether_addr_copy(peer->peer_addr, sta_ptr->mac_addr);
1239 			peer++;
1240 			count++;
1241 			if (count >= MWIFIEX_MAX_TDLS_PEER_SUPPORTED)
1242 				break;
1243 		}
1244 	}
1245 	spin_unlock_bh(&priv->sta_list_spinlock);
1246 
1247 	return count;
1248 }
1249 
1250 void mwifiex_disable_all_tdls_links(struct mwifiex_private *priv)
1251 {
1252 	struct mwifiex_sta_node *sta_ptr;
1253 	struct mwifiex_ds_tdls_oper tdls_oper;
1254 
1255 	if (list_empty(&priv->sta_list))
1256 		return;
1257 
1258 	list_for_each_entry(sta_ptr, &priv->sta_list, list) {
1259 		memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1260 
1261 		if (sta_ptr->is_11n_enabled) {
1262 			mwifiex_11n_cleanup_reorder_tbl(priv);
1263 			spin_lock_bh(&priv->wmm.ra_list_spinlock);
1264 			mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1265 			spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1266 		}
1267 
1268 		mwifiex_restore_tdls_packets(priv, sta_ptr->mac_addr,
1269 					     TDLS_LINK_TEARDOWN);
1270 		memcpy(&tdls_oper.peer_mac, sta_ptr->mac_addr, ETH_ALEN);
1271 		tdls_oper.tdls_action = MWIFIEX_TDLS_DISABLE_LINK;
1272 		if (mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1273 				     HostCmd_ACT_GEN_SET, 0, &tdls_oper, false))
1274 			mwifiex_dbg(priv->adapter, ERROR,
1275 				    "Disable link failed for TDLS peer %pM",
1276 				    sta_ptr->mac_addr);
1277 	}
1278 
1279 	mwifiex_del_all_sta_list(priv);
1280 }
1281 
1282 int mwifiex_tdls_check_tx(struct mwifiex_private *priv, struct sk_buff *skb)
1283 {
1284 	struct mwifiex_auto_tdls_peer *peer;
1285 	u8 mac[ETH_ALEN];
1286 
1287 	ether_addr_copy(mac, skb->data);
1288 
1289 	spin_lock_bh(&priv->auto_tdls_lock);
1290 	list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1291 		if (!memcmp(mac, peer->mac_addr, ETH_ALEN)) {
1292 			if (peer->rssi <= MWIFIEX_TDLS_RSSI_HIGH &&
1293 			    peer->tdls_status == TDLS_NOT_SETUP &&
1294 			    (peer->failure_count <
1295 			     MWIFIEX_TDLS_MAX_FAIL_COUNT)) {
1296 				peer->tdls_status = TDLS_SETUP_INPROGRESS;
1297 				mwifiex_dbg(priv->adapter, INFO,
1298 					    "setup TDLS link, peer=%pM rssi=%d\n",
1299 					    peer->mac_addr, peer->rssi);
1300 
1301 				cfg80211_tdls_oper_request(priv->netdev,
1302 							   peer->mac_addr,
1303 							   NL80211_TDLS_SETUP,
1304 							   0, GFP_ATOMIC);
1305 				peer->do_setup = false;
1306 				priv->check_tdls_tx = false;
1307 			} else if (peer->failure_count <
1308 				   MWIFIEX_TDLS_MAX_FAIL_COUNT &&
1309 				   peer->do_discover) {
1310 				mwifiex_send_tdls_data_frame(priv,
1311 							     peer->mac_addr,
1312 						    WLAN_TDLS_DISCOVERY_REQUEST,
1313 							     1, 0, NULL, 0);
1314 				peer->do_discover = false;
1315 			}
1316 		}
1317 	}
1318 	spin_unlock_bh(&priv->auto_tdls_lock);
1319 
1320 	return 0;
1321 }
1322 
1323 void mwifiex_flush_auto_tdls_list(struct mwifiex_private *priv)
1324 {
1325 	struct mwifiex_auto_tdls_peer *peer, *tmp_node;
1326 
1327 	spin_lock_bh(&priv->auto_tdls_lock);
1328 	list_for_each_entry_safe(peer, tmp_node, &priv->auto_tdls_list, list) {
1329 		list_del(&peer->list);
1330 		kfree(peer);
1331 	}
1332 
1333 	INIT_LIST_HEAD(&priv->auto_tdls_list);
1334 	spin_unlock_bh(&priv->auto_tdls_lock);
1335 	priv->check_tdls_tx = false;
1336 }
1337 
1338 void mwifiex_add_auto_tdls_peer(struct mwifiex_private *priv, const u8 *mac)
1339 {
1340 	struct mwifiex_auto_tdls_peer *tdls_peer;
1341 
1342 	if (!priv->adapter->auto_tdls)
1343 		return;
1344 
1345 	spin_lock_bh(&priv->auto_tdls_lock);
1346 	list_for_each_entry(tdls_peer, &priv->auto_tdls_list, list) {
1347 		if (!memcmp(tdls_peer->mac_addr, mac, ETH_ALEN)) {
1348 			tdls_peer->tdls_status = TDLS_SETUP_INPROGRESS;
1349 			tdls_peer->rssi_jiffies = jiffies;
1350 			spin_unlock_bh(&priv->auto_tdls_lock);
1351 			return;
1352 		}
1353 	}
1354 
1355 	/* create new TDLS peer */
1356 	tdls_peer = kzalloc(sizeof(*tdls_peer), GFP_ATOMIC);
1357 	if (tdls_peer) {
1358 		ether_addr_copy(tdls_peer->mac_addr, mac);
1359 		tdls_peer->tdls_status = TDLS_SETUP_INPROGRESS;
1360 		tdls_peer->rssi_jiffies = jiffies;
1361 		INIT_LIST_HEAD(&tdls_peer->list);
1362 		list_add_tail(&tdls_peer->list, &priv->auto_tdls_list);
1363 		mwifiex_dbg(priv->adapter, INFO,
1364 			    "Add auto TDLS peer= %pM to list\n", mac);
1365 	}
1366 
1367 	spin_unlock_bh(&priv->auto_tdls_lock);
1368 }
1369 
1370 void mwifiex_auto_tdls_update_peer_status(struct mwifiex_private *priv,
1371 					  const u8 *mac, u8 link_status)
1372 {
1373 	struct mwifiex_auto_tdls_peer *peer;
1374 
1375 	if (!priv->adapter->auto_tdls)
1376 		return;
1377 
1378 	spin_lock_bh(&priv->auto_tdls_lock);
1379 	list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1380 		if (!memcmp(peer->mac_addr, mac, ETH_ALEN)) {
1381 			if ((link_status == TDLS_NOT_SETUP) &&
1382 			    (peer->tdls_status == TDLS_SETUP_INPROGRESS))
1383 				peer->failure_count++;
1384 			else if (mwifiex_is_tdls_link_setup(link_status))
1385 				peer->failure_count = 0;
1386 
1387 			peer->tdls_status = link_status;
1388 			break;
1389 		}
1390 	}
1391 	spin_unlock_bh(&priv->auto_tdls_lock);
1392 }
1393 
1394 void mwifiex_auto_tdls_update_peer_signal(struct mwifiex_private *priv,
1395 					  u8 *mac, s8 snr, s8 nflr)
1396 {
1397 	struct mwifiex_auto_tdls_peer *peer;
1398 
1399 	if (!priv->adapter->auto_tdls)
1400 		return;
1401 
1402 	spin_lock_bh(&priv->auto_tdls_lock);
1403 	list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1404 		if (!memcmp(peer->mac_addr, mac, ETH_ALEN)) {
1405 			peer->rssi = nflr - snr;
1406 			peer->rssi_jiffies = jiffies;
1407 			break;
1408 		}
1409 	}
1410 	spin_unlock_bh(&priv->auto_tdls_lock);
1411 }
1412 
1413 void mwifiex_check_auto_tdls(struct timer_list *t)
1414 {
1415 	struct mwifiex_private *priv = from_timer(priv, t, auto_tdls_timer);
1416 	struct mwifiex_auto_tdls_peer *tdls_peer;
1417 	u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;
1418 
1419 	if (WARN_ON_ONCE(!priv || !priv->adapter)) {
1420 		pr_err("mwifiex: %s: adapter or private structure is NULL\n",
1421 		       __func__);
1422 		return;
1423 	}
1424 
1425 	if (unlikely(!priv->adapter->auto_tdls))
1426 		return;
1427 
1428 	if (!priv->auto_tdls_timer_active) {
1429 		mwifiex_dbg(priv->adapter, INFO,
1430 			    "auto TDLS timer inactive; return");
1431 		return;
1432 	}
1433 
1434 	priv->check_tdls_tx = false;
1435 
1436 	spin_lock_bh(&priv->auto_tdls_lock);
1437 	list_for_each_entry(tdls_peer, &priv->auto_tdls_list, list) {
1438 		if ((jiffies - tdls_peer->rssi_jiffies) >
1439 		    (MWIFIEX_AUTO_TDLS_IDLE_TIME * HZ)) {
1440 			tdls_peer->rssi = 0;
1441 			tdls_peer->do_discover = true;
1442 			priv->check_tdls_tx = true;
1443 		}
1444 
1445 		if (((tdls_peer->rssi >= MWIFIEX_TDLS_RSSI_LOW) ||
1446 		     !tdls_peer->rssi) &&
1447 		    mwifiex_is_tdls_link_setup(tdls_peer->tdls_status)) {
1448 			tdls_peer->tdls_status = TDLS_LINK_TEARDOWN;
1449 			mwifiex_dbg(priv->adapter, MSG,
1450 				    "teardown TDLS link,peer=%pM rssi=%d\n",
1451 				    tdls_peer->mac_addr, -tdls_peer->rssi);
1452 			tdls_peer->do_discover = true;
1453 			priv->check_tdls_tx = true;
1454 			cfg80211_tdls_oper_request(priv->netdev,
1455 						   tdls_peer->mac_addr,
1456 						   NL80211_TDLS_TEARDOWN,
1457 						   reason, GFP_ATOMIC);
1458 		} else if (tdls_peer->rssi &&
1459 			   tdls_peer->rssi <= MWIFIEX_TDLS_RSSI_HIGH &&
1460 			   tdls_peer->tdls_status == TDLS_NOT_SETUP &&
1461 			   tdls_peer->failure_count <
1462 			   MWIFIEX_TDLS_MAX_FAIL_COUNT) {
1463 				priv->check_tdls_tx = true;
1464 				tdls_peer->do_setup = true;
1465 				mwifiex_dbg(priv->adapter, INFO,
1466 					    "check TDLS with peer=%pM\t"
1467 					    "rssi=%d\n", tdls_peer->mac_addr,
1468 					    tdls_peer->rssi);
1469 		}
1470 	}
1471 	spin_unlock_bh(&priv->auto_tdls_lock);
1472 
1473 	mod_timer(&priv->auto_tdls_timer,
1474 		  jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
1475 }
1476 
1477 void mwifiex_setup_auto_tdls_timer(struct mwifiex_private *priv)
1478 {
1479 	timer_setup(&priv->auto_tdls_timer, mwifiex_check_auto_tdls, 0);
1480 	priv->auto_tdls_timer_active = true;
1481 	mod_timer(&priv->auto_tdls_timer,
1482 		  jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
1483 }
1484 
1485 void mwifiex_clean_auto_tdls(struct mwifiex_private *priv)
1486 {
1487 	if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
1488 	    priv->adapter->auto_tdls &&
1489 	    priv->bss_type == MWIFIEX_BSS_TYPE_STA) {
1490 		priv->auto_tdls_timer_active = false;
1491 		del_timer(&priv->auto_tdls_timer);
1492 		mwifiex_flush_auto_tdls_list(priv);
1493 	}
1494 }
1495 
1496 static int mwifiex_config_tdls(struct mwifiex_private *priv, u8 enable)
1497 {
1498 	struct mwifiex_tdls_config config;
1499 
1500 	config.enable = cpu_to_le16(enable);
1501 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_CONFIG,
1502 				ACT_TDLS_CS_ENABLE_CONFIG, 0, &config, true);
1503 }
1504 
1505 int mwifiex_config_tdls_enable(struct mwifiex_private *priv)
1506 {
1507 	return mwifiex_config_tdls(priv, true);
1508 }
1509 
1510 int mwifiex_config_tdls_disable(struct mwifiex_private *priv)
1511 {
1512 	return mwifiex_config_tdls(priv, false);
1513 }
1514 
1515 int mwifiex_config_tdls_cs_params(struct mwifiex_private *priv)
1516 {
1517 	struct mwifiex_tdls_config_cs_params config_tdls_cs_params;
1518 
1519 	config_tdls_cs_params.unit_time = MWIFIEX_DEF_CS_UNIT_TIME;
1520 	config_tdls_cs_params.thr_otherlink = MWIFIEX_DEF_CS_THR_OTHERLINK;
1521 	config_tdls_cs_params.thr_directlink = MWIFIEX_DEF_THR_DIRECTLINK;
1522 
1523 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_CONFIG,
1524 				ACT_TDLS_CS_PARAMS, 0,
1525 				&config_tdls_cs_params, true);
1526 }
1527 
1528 int mwifiex_stop_tdls_cs(struct mwifiex_private *priv, const u8 *peer_mac)
1529 {
1530 	struct mwifiex_tdls_stop_cs_params stop_tdls_cs_params;
1531 
1532 	ether_addr_copy(stop_tdls_cs_params.peer_mac, peer_mac);
1533 
1534 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_CONFIG,
1535 				ACT_TDLS_CS_STOP, 0,
1536 				&stop_tdls_cs_params, true);
1537 }
1538 
1539 int mwifiex_start_tdls_cs(struct mwifiex_private *priv, const u8 *peer_mac,
1540 			  u8 primary_chan, u8 second_chan_offset, u8 band)
1541 {
1542 	struct mwifiex_tdls_init_cs_params start_tdls_cs_params;
1543 
1544 	ether_addr_copy(start_tdls_cs_params.peer_mac, peer_mac);
1545 	start_tdls_cs_params.primary_chan = primary_chan;
1546 	start_tdls_cs_params.second_chan_offset = second_chan_offset;
1547 	start_tdls_cs_params.band = band;
1548 
1549 	start_tdls_cs_params.switch_time = cpu_to_le16(MWIFIEX_DEF_CS_TIME);
1550 	start_tdls_cs_params.switch_timeout =
1551 					cpu_to_le16(MWIFIEX_DEF_CS_TIMEOUT);
1552 	start_tdls_cs_params.reg_class = MWIFIEX_DEF_CS_REG_CLASS;
1553 	start_tdls_cs_params.periodicity = MWIFIEX_DEF_CS_PERIODICITY;
1554 
1555 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_CONFIG,
1556 				ACT_TDLS_CS_INIT, 0,
1557 				&start_tdls_cs_params, true);
1558 }
1559