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 	unsigned long flags;
37 	u32 tid;
38 	u8 tid_down;
39 
40 	mwifiex_dbg(priv->adapter, DATA, "%s: %pM\n", __func__, mac);
41 	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
42 
43 	skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) {
44 		if (!ether_addr_equal(mac, skb->data))
45 			continue;
46 
47 		__skb_unlink(skb, &priv->tdls_txq);
48 		tx_info = MWIFIEX_SKB_TXCB(skb);
49 		tid = skb->priority;
50 		tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
51 
52 		if (mwifiex_is_tdls_link_setup(status)) {
53 			ra_list = mwifiex_wmm_get_queue_raptr(priv, tid, mac);
54 			ra_list->tdls_link = true;
55 			tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
56 		} else {
57 			tid_list = &priv->wmm.tid_tbl_ptr[tid_down].ra_list;
58 			if (!list_empty(tid_list))
59 				ra_list = list_first_entry(tid_list,
60 					      struct mwifiex_ra_list_tbl, list);
61 			else
62 				ra_list = NULL;
63 			tx_info->flags &= ~MWIFIEX_BUF_FLAG_TDLS_PKT;
64 		}
65 
66 		if (!ra_list) {
67 			mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
68 			continue;
69 		}
70 
71 		skb_queue_tail(&ra_list->skb_head, skb);
72 
73 		ra_list->ba_pkt_count++;
74 		ra_list->total_pkt_count++;
75 
76 		if (atomic_read(&priv->wmm.highest_queued_prio) <
77 						       tos_to_tid_inv[tid_down])
78 			atomic_set(&priv->wmm.highest_queued_prio,
79 				   tos_to_tid_inv[tid_down]);
80 
81 		atomic_inc(&priv->wmm.tx_pkts_queued);
82 	}
83 
84 	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
85 	return;
86 }
87 
88 static void mwifiex_hold_tdls_packets(struct mwifiex_private *priv,
89 				      const u8 *mac)
90 {
91 	struct mwifiex_ra_list_tbl *ra_list;
92 	struct list_head *ra_list_head;
93 	struct sk_buff *skb, *tmp;
94 	unsigned long flags;
95 	int i;
96 
97 	mwifiex_dbg(priv->adapter, DATA, "%s: %pM\n", __func__, mac);
98 	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
99 
100 	for (i = 0; i < MAX_NUM_TID; i++) {
101 		if (!list_empty(&priv->wmm.tid_tbl_ptr[i].ra_list)) {
102 			ra_list_head = &priv->wmm.tid_tbl_ptr[i].ra_list;
103 			list_for_each_entry(ra_list, ra_list_head, list) {
104 				skb_queue_walk_safe(&ra_list->skb_head, skb,
105 						    tmp) {
106 					if (!ether_addr_equal(mac, skb->data))
107 						continue;
108 					__skb_unlink(skb, &ra_list->skb_head);
109 					atomic_dec(&priv->wmm.tx_pkts_queued);
110 					ra_list->total_pkt_count--;
111 					skb_queue_tail(&priv->tdls_txq, skb);
112 				}
113 			}
114 		}
115 	}
116 
117 	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
118 	return;
119 }
120 
121 /* This function appends rate TLV to scan config command. */
122 static int
123 mwifiex_tdls_append_rates_ie(struct mwifiex_private *priv,
124 			     struct sk_buff *skb)
125 {
126 	u8 rates[MWIFIEX_SUPPORTED_RATES], *pos;
127 	u16 rates_size, supp_rates_size, ext_rates_size;
128 
129 	memset(rates, 0, sizeof(rates));
130 	rates_size = mwifiex_get_supported_rates(priv, rates);
131 
132 	supp_rates_size = min_t(u16, rates_size, MWIFIEX_TDLS_SUPPORTED_RATES);
133 
134 	if (skb_tailroom(skb) < rates_size + 4) {
135 		mwifiex_dbg(priv->adapter, ERROR,
136 			    "Insuffient space while adding rates\n");
137 		return -ENOMEM;
138 	}
139 
140 	pos = skb_put(skb, supp_rates_size + 2);
141 	*pos++ = WLAN_EID_SUPP_RATES;
142 	*pos++ = supp_rates_size;
143 	memcpy(pos, rates, supp_rates_size);
144 
145 	if (rates_size > MWIFIEX_TDLS_SUPPORTED_RATES) {
146 		ext_rates_size = rates_size - MWIFIEX_TDLS_SUPPORTED_RATES;
147 		pos = skb_put(skb, ext_rates_size + 2);
148 		*pos++ = WLAN_EID_EXT_SUPP_RATES;
149 		*pos++ = ext_rates_size;
150 		memcpy(pos, rates + MWIFIEX_TDLS_SUPPORTED_RATES,
151 		       ext_rates_size);
152 	}
153 
154 	return 0;
155 }
156 
157 static void mwifiex_tdls_add_aid(struct mwifiex_private *priv,
158 				struct sk_buff *skb)
159 {
160 	struct ieee_types_assoc_rsp *assoc_rsp;
161 	u8 *pos;
162 
163 	assoc_rsp = (struct ieee_types_assoc_rsp *)&priv->assoc_rsp_buf;
164 	pos = (void *)skb_put(skb, 4);
165 	*pos++ = WLAN_EID_AID;
166 	*pos++ = 2;
167 	memcpy(pos, &assoc_rsp->a_id, sizeof(assoc_rsp->a_id));
168 
169 	return;
170 }
171 
172 static int mwifiex_tdls_add_vht_capab(struct mwifiex_private *priv,
173 				      struct sk_buff *skb)
174 {
175 	struct ieee80211_vht_cap vht_cap;
176 	u8 *pos;
177 
178 	pos = (void *)skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
179 	*pos++ = WLAN_EID_VHT_CAPABILITY;
180 	*pos++ = sizeof(struct ieee80211_vht_cap);
181 
182 	memset(&vht_cap, 0, sizeof(struct ieee80211_vht_cap));
183 
184 	mwifiex_fill_vht_cap_tlv(priv, &vht_cap, priv->curr_bss_params.band);
185 	memcpy(pos, &vht_cap, sizeof(vht_cap));
186 
187 	return 0;
188 }
189 
190 static int
191 mwifiex_tdls_add_ht_oper(struct mwifiex_private *priv, const u8 *mac,
192 			 u8 vht_enabled, struct sk_buff *skb)
193 {
194 	struct ieee80211_ht_operation *ht_oper;
195 	struct mwifiex_sta_node *sta_ptr;
196 	struct mwifiex_bssdescriptor *bss_desc =
197 					&priv->curr_bss_params.bss_descriptor;
198 	u8 *pos;
199 
200 	sta_ptr = mwifiex_get_sta_entry(priv, mac);
201 	if (unlikely(!sta_ptr)) {
202 		mwifiex_dbg(priv->adapter, ERROR,
203 			    "TDLS peer station not found in list\n");
204 		return -1;
205 	}
206 
207 	if (!(le16_to_cpu(sta_ptr->tdls_cap.ht_capb.cap_info))) {
208 		mwifiex_dbg(priv->adapter, WARN,
209 			    "TDLS peer doesn't support ht capabilities\n");
210 		return 0;
211 	}
212 
213 	pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_operation) + 2);
214 	*pos++ = WLAN_EID_HT_OPERATION;
215 	*pos++ = sizeof(struct ieee80211_ht_operation);
216 	ht_oper = (void *)pos;
217 
218 	ht_oper->primary_chan = bss_desc->channel;
219 
220 	/* follow AP's channel bandwidth */
221 	if (ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&
222 	    bss_desc->bcn_ht_cap &&
223 	    ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_oper->ht_param))
224 		ht_oper->ht_param = bss_desc->bcn_ht_oper->ht_param;
225 
226 	if (vht_enabled) {
227 		ht_oper->ht_param =
228 			  mwifiex_get_sec_chan_offset(bss_desc->channel);
229 		ht_oper->ht_param |= BIT(2);
230 	}
231 
232 	memcpy(&sta_ptr->tdls_cap.ht_oper, ht_oper,
233 	       sizeof(struct ieee80211_ht_operation));
234 
235 	return 0;
236 }
237 
238 static int mwifiex_tdls_add_vht_oper(struct mwifiex_private *priv,
239 				     const u8 *mac, struct sk_buff *skb)
240 {
241 	struct mwifiex_bssdescriptor *bss_desc;
242 	struct ieee80211_vht_operation *vht_oper;
243 	struct ieee80211_vht_cap *vht_cap, *ap_vht_cap = NULL;
244 	struct mwifiex_sta_node *sta_ptr;
245 	struct mwifiex_adapter *adapter = priv->adapter;
246 	u8 supp_chwd_set, peer_supp_chwd_set;
247 	u8 *pos, ap_supp_chwd_set, chan_bw;
248 	u16 mcs_map_user, mcs_map_resp, mcs_map_result;
249 	u16 mcs_user, mcs_resp, nss;
250 	u32 usr_vht_cap_info;
251 
252 	bss_desc = &priv->curr_bss_params.bss_descriptor;
253 
254 	sta_ptr = mwifiex_get_sta_entry(priv, mac);
255 	if (unlikely(!sta_ptr)) {
256 		mwifiex_dbg(adapter, ERROR,
257 			    "TDLS peer station not found in list\n");
258 		return -1;
259 	}
260 
261 	if (!(le32_to_cpu(sta_ptr->tdls_cap.vhtcap.vht_cap_info))) {
262 		mwifiex_dbg(adapter, WARN,
263 			    "TDLS peer doesn't support vht capabilities\n");
264 		return 0;
265 	}
266 
267 	if (!mwifiex_is_bss_in_11ac_mode(priv)) {
268 		if (sta_ptr->tdls_cap.extcap.ext_capab[7] &
269 		   WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
270 			mwifiex_dbg(adapter, WARN,
271 				    "TDLS peer doesn't support wider bandwidth\n");
272 			return 0;
273 		}
274 	} else {
275 		ap_vht_cap = bss_desc->bcn_vht_cap;
276 	}
277 
278 	pos = (void *)skb_put(skb, sizeof(struct ieee80211_vht_operation) + 2);
279 	*pos++ = WLAN_EID_VHT_OPERATION;
280 	*pos++ = sizeof(struct ieee80211_vht_operation);
281 	vht_oper = (struct ieee80211_vht_operation *)pos;
282 
283 	if (bss_desc->bss_band & BAND_A)
284 		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
285 	else
286 		usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
287 
288 	/* find the minimum bandwidth between AP/TDLS peers */
289 	vht_cap = &sta_ptr->tdls_cap.vhtcap;
290 	supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);
291 	peer_supp_chwd_set =
292 			 GET_VHTCAP_CHWDSET(le32_to_cpu(vht_cap->vht_cap_info));
293 	supp_chwd_set = min_t(u8, supp_chwd_set, peer_supp_chwd_set);
294 
295 	/* We need check AP's bandwidth when TDLS_WIDER_BANDWIDTH is off */
296 
297 	if (ap_vht_cap && sta_ptr->tdls_cap.extcap.ext_capab[7] &
298 	    WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
299 		ap_supp_chwd_set =
300 		      GET_VHTCAP_CHWDSET(le32_to_cpu(ap_vht_cap->vht_cap_info));
301 		supp_chwd_set = min_t(u8, supp_chwd_set, ap_supp_chwd_set);
302 	}
303 
304 	switch (supp_chwd_set) {
305 	case IEEE80211_VHT_CHANWIDTH_80MHZ:
306 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
307 		break;
308 	case IEEE80211_VHT_CHANWIDTH_160MHZ:
309 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
310 		break;
311 	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
312 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
313 		break;
314 	default:
315 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
316 		break;
317 	}
318 
319 	mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
320 	mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.rx_mcs_map);
321 	mcs_map_result = 0;
322 
323 	for (nss = 1; nss <= 8; nss++) {
324 		mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
325 		mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
326 
327 		if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) ||
328 		    (mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED))
329 			SET_VHTNSSMCS(mcs_map_result, nss,
330 				      IEEE80211_VHT_MCS_NOT_SUPPORTED);
331 		else
332 			SET_VHTNSSMCS(mcs_map_result, nss,
333 				      min_t(u16, mcs_user, mcs_resp));
334 	}
335 
336 	vht_oper->basic_mcs_set = cpu_to_le16(mcs_map_result);
337 
338 	switch (vht_oper->chan_width) {
339 	case IEEE80211_VHT_CHANWIDTH_80MHZ:
340 		chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
341 		break;
342 	case IEEE80211_VHT_CHANWIDTH_160MHZ:
343 		chan_bw = IEEE80211_VHT_CHANWIDTH_160MHZ;
344 		break;
345 	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
346 		chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
347 		break;
348 	default:
349 		chan_bw = IEEE80211_VHT_CHANWIDTH_USE_HT;
350 		break;
351 	}
352 	vht_oper->center_freq_seg1_idx =
353 			mwifiex_get_center_freq_index(priv, BAND_AAC,
354 						      bss_desc->channel,
355 						      chan_bw);
356 
357 	return 0;
358 }
359 
360 static void mwifiex_tdls_add_ext_capab(struct mwifiex_private *priv,
361 				       struct sk_buff *skb)
362 {
363 	struct ieee_types_extcap *extcap;
364 
365 	extcap = (void *)skb_put(skb, sizeof(struct ieee_types_extcap));
366 	extcap->ieee_hdr.element_id = WLAN_EID_EXT_CAPABILITY;
367 	extcap->ieee_hdr.len = 8;
368 	memset(extcap->ext_capab, 0, 8);
369 	extcap->ext_capab[4] |= WLAN_EXT_CAPA5_TDLS_ENABLED;
370 	extcap->ext_capab[3] |= WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH;
371 
372 	if (priv->adapter->is_hw_11ac_capable)
373 		extcap->ext_capab[7] |= WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED;
374 }
375 
376 static void mwifiex_tdls_add_qos_capab(struct sk_buff *skb)
377 {
378 	u8 *pos = (void *)skb_put(skb, 3);
379 
380 	*pos++ = WLAN_EID_QOS_CAPA;
381 	*pos++ = 1;
382 	*pos++ = MWIFIEX_TDLS_DEF_QOS_CAPAB;
383 }
384 
385 static void
386 mwifiex_tdls_add_wmm_param_ie(struct mwifiex_private *priv, struct sk_buff *skb)
387 {
388 	struct ieee80211_wmm_param_ie *wmm;
389 	u8 ac_vi[] = {0x42, 0x43, 0x5e, 0x00};
390 	u8 ac_vo[] = {0x62, 0x32, 0x2f, 0x00};
391 	u8 ac_be[] = {0x03, 0xa4, 0x00, 0x00};
392 	u8 ac_bk[] = {0x27, 0xa4, 0x00, 0x00};
393 
394 	wmm = (void *)skb_put(skb, sizeof(*wmm));
395 	memset(wmm, 0, sizeof(*wmm));
396 
397 	wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
398 	wmm->len = sizeof(*wmm) - 2;
399 	wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
400 	wmm->oui[1] = 0x50;
401 	wmm->oui[2] = 0xf2;
402 	wmm->oui_type = 2; /* WME */
403 	wmm->oui_subtype = 1; /* WME param */
404 	wmm->version = 1; /* WME ver */
405 	wmm->qos_info = 0; /* U-APSD not in use */
406 
407 	/* use default WMM AC parameters for TDLS link*/
408 	memcpy(&wmm->ac[0], ac_be, sizeof(ac_be));
409 	memcpy(&wmm->ac[1], ac_bk, sizeof(ac_bk));
410 	memcpy(&wmm->ac[2], ac_vi, sizeof(ac_vi));
411 	memcpy(&wmm->ac[3], ac_vo, sizeof(ac_vo));
412 }
413 
414 static void
415 mwifiex_add_wmm_info_ie(struct mwifiex_private *priv, struct sk_buff *skb,
416 			u8 qosinfo)
417 {
418 	u8 *buf;
419 
420 	buf = (void *)skb_put(skb, MWIFIEX_TDLS_WMM_INFO_SIZE +
421 			      sizeof(struct ieee_types_header));
422 
423 	*buf++ = WLAN_EID_VENDOR_SPECIFIC;
424 	*buf++ = 7; /* len */
425 	*buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
426 	*buf++ = 0x50;
427 	*buf++ = 0xf2;
428 	*buf++ = 2; /* WME */
429 	*buf++ = 0; /* WME info */
430 	*buf++ = 1; /* WME ver */
431 	*buf++ = qosinfo; /* U-APSD no in use */
432 }
433 
434 static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
435 					const u8 *peer, u8 action_code,
436 					u8 dialog_token,
437 					u16 status_code, struct sk_buff *skb)
438 {
439 	struct ieee80211_tdls_data *tf;
440 	int ret;
441 	u16 capab;
442 	struct ieee80211_ht_cap *ht_cap;
443 	u8 radio, *pos;
444 
445 	capab = priv->curr_bss_params.bss_descriptor.cap_info_bitmap;
446 
447 	tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
448 	memcpy(tf->da, peer, ETH_ALEN);
449 	memcpy(tf->sa, priv->curr_addr, ETH_ALEN);
450 	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
451 	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
452 
453 	switch (action_code) {
454 	case WLAN_TDLS_SETUP_REQUEST:
455 		tf->category = WLAN_CATEGORY_TDLS;
456 		tf->action_code = WLAN_TDLS_SETUP_REQUEST;
457 		skb_put(skb, sizeof(tf->u.setup_req));
458 		tf->u.setup_req.dialog_token = dialog_token;
459 		tf->u.setup_req.capability = cpu_to_le16(capab);
460 		ret = mwifiex_tdls_append_rates_ie(priv, skb);
461 		if (ret) {
462 			dev_kfree_skb_any(skb);
463 			return ret;
464 		}
465 
466 		pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
467 		*pos++ = WLAN_EID_HT_CAPABILITY;
468 		*pos++ = sizeof(struct ieee80211_ht_cap);
469 		ht_cap = (void *)pos;
470 		radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
471 		ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
472 		if (ret) {
473 			dev_kfree_skb_any(skb);
474 			return ret;
475 		}
476 
477 		if (priv->adapter->is_hw_11ac_capable) {
478 			ret = mwifiex_tdls_add_vht_capab(priv, skb);
479 			if (ret) {
480 				dev_kfree_skb_any(skb);
481 				return ret;
482 			}
483 			mwifiex_tdls_add_aid(priv, skb);
484 		}
485 
486 		mwifiex_tdls_add_ext_capab(priv, skb);
487 		mwifiex_tdls_add_qos_capab(skb);
488 		mwifiex_add_wmm_info_ie(priv, skb, 0);
489 		break;
490 
491 	case WLAN_TDLS_SETUP_RESPONSE:
492 		tf->category = WLAN_CATEGORY_TDLS;
493 		tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
494 		skb_put(skb, sizeof(tf->u.setup_resp));
495 		tf->u.setup_resp.status_code = cpu_to_le16(status_code);
496 		tf->u.setup_resp.dialog_token = dialog_token;
497 		tf->u.setup_resp.capability = cpu_to_le16(capab);
498 		ret = mwifiex_tdls_append_rates_ie(priv, skb);
499 		if (ret) {
500 			dev_kfree_skb_any(skb);
501 			return ret;
502 		}
503 
504 		pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
505 		*pos++ = WLAN_EID_HT_CAPABILITY;
506 		*pos++ = sizeof(struct ieee80211_ht_cap);
507 		ht_cap = (void *)pos;
508 		radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
509 		ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
510 		if (ret) {
511 			dev_kfree_skb_any(skb);
512 			return ret;
513 		}
514 
515 		if (priv->adapter->is_hw_11ac_capable) {
516 			ret = mwifiex_tdls_add_vht_capab(priv, skb);
517 			if (ret) {
518 				dev_kfree_skb_any(skb);
519 				return ret;
520 			}
521 			mwifiex_tdls_add_aid(priv, skb);
522 		}
523 
524 		mwifiex_tdls_add_ext_capab(priv, skb);
525 		mwifiex_tdls_add_qos_capab(skb);
526 		mwifiex_add_wmm_info_ie(priv, skb, 0);
527 		break;
528 
529 	case WLAN_TDLS_SETUP_CONFIRM:
530 		tf->category = WLAN_CATEGORY_TDLS;
531 		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
532 		skb_put(skb, sizeof(tf->u.setup_cfm));
533 		tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
534 		tf->u.setup_cfm.dialog_token = dialog_token;
535 
536 		mwifiex_tdls_add_wmm_param_ie(priv, skb);
537 		if (priv->adapter->is_hw_11ac_capable) {
538 			ret = mwifiex_tdls_add_vht_oper(priv, peer, skb);
539 			if (ret) {
540 				dev_kfree_skb_any(skb);
541 				return ret;
542 			}
543 			ret = mwifiex_tdls_add_ht_oper(priv, peer, 1, skb);
544 			if (ret) {
545 				dev_kfree_skb_any(skb);
546 				return ret;
547 			}
548 		} else {
549 			ret = mwifiex_tdls_add_ht_oper(priv, peer, 0, skb);
550 			if (ret) {
551 				dev_kfree_skb_any(skb);
552 				return ret;
553 			}
554 		}
555 		break;
556 
557 	case WLAN_TDLS_TEARDOWN:
558 		tf->category = WLAN_CATEGORY_TDLS;
559 		tf->action_code = WLAN_TDLS_TEARDOWN;
560 		skb_put(skb, sizeof(tf->u.teardown));
561 		tf->u.teardown.reason_code = cpu_to_le16(status_code);
562 		break;
563 
564 	case WLAN_TDLS_DISCOVERY_REQUEST:
565 		tf->category = WLAN_CATEGORY_TDLS;
566 		tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
567 		skb_put(skb, sizeof(tf->u.discover_req));
568 		tf->u.discover_req.dialog_token = dialog_token;
569 		break;
570 	default:
571 		mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS frame type.\n");
572 		return -EINVAL;
573 	}
574 
575 	return 0;
576 }
577 
578 static void
579 mwifiex_tdls_add_link_ie(struct sk_buff *skb, const u8 *src_addr,
580 			 const u8 *peer, const u8 *bssid)
581 {
582 	struct ieee80211_tdls_lnkie *lnkid;
583 
584 	lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
585 	lnkid->ie_type = WLAN_EID_LINK_ID;
586 	lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) -
587 			sizeof(struct ieee_types_header);
588 
589 	memcpy(lnkid->bssid, bssid, ETH_ALEN);
590 	memcpy(lnkid->init_sta, src_addr, ETH_ALEN);
591 	memcpy(lnkid->resp_sta, peer, ETH_ALEN);
592 }
593 
594 int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv, const u8 *peer,
595 				 u8 action_code, u8 dialog_token,
596 				 u16 status_code, const u8 *extra_ies,
597 				 size_t extra_ies_len)
598 {
599 	struct sk_buff *skb;
600 	struct mwifiex_txinfo *tx_info;
601 	int ret;
602 	u16 skb_len;
603 
604 	skb_len = MWIFIEX_MIN_DATA_HEADER_LEN +
605 		  max(sizeof(struct ieee80211_mgmt),
606 		      sizeof(struct ieee80211_tdls_data)) +
607 		  MWIFIEX_MGMT_FRAME_HEADER_SIZE +
608 		  MWIFIEX_SUPPORTED_RATES +
609 		  3 + /* Qos Info */
610 		  sizeof(struct ieee_types_extcap) +
611 		  sizeof(struct ieee80211_ht_cap) +
612 		  sizeof(struct ieee_types_bss_co_2040) +
613 		  sizeof(struct ieee80211_ht_operation) +
614 		  sizeof(struct ieee80211_tdls_lnkie) +
615 		  sizeof(struct ieee80211_wmm_param_ie) +
616 		  extra_ies_len;
617 
618 	if (priv->adapter->is_hw_11ac_capable)
619 		skb_len += sizeof(struct ieee_types_vht_cap) +
620 			   sizeof(struct ieee_types_vht_oper) +
621 			   sizeof(struct ieee_types_aid);
622 
623 	skb = dev_alloc_skb(skb_len);
624 	if (!skb) {
625 		mwifiex_dbg(priv->adapter, ERROR,
626 			    "allocate skb failed for management frame\n");
627 		return -ENOMEM;
628 	}
629 	skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
630 
631 	switch (action_code) {
632 	case WLAN_TDLS_SETUP_REQUEST:
633 	case WLAN_TDLS_SETUP_CONFIRM:
634 	case WLAN_TDLS_TEARDOWN:
635 	case WLAN_TDLS_DISCOVERY_REQUEST:
636 		ret = mwifiex_prep_tdls_encap_data(priv, peer, action_code,
637 						   dialog_token, status_code,
638 						   skb);
639 		if (ret) {
640 			dev_kfree_skb_any(skb);
641 			return ret;
642 		}
643 		if (extra_ies_len)
644 			memcpy(skb_put(skb, extra_ies_len), extra_ies,
645 			       extra_ies_len);
646 		mwifiex_tdls_add_link_ie(skb, priv->curr_addr, peer,
647 					 priv->cfg_bssid);
648 		break;
649 	case WLAN_TDLS_SETUP_RESPONSE:
650 		ret = mwifiex_prep_tdls_encap_data(priv, peer, action_code,
651 						   dialog_token, status_code,
652 						   skb);
653 		if (ret) {
654 			dev_kfree_skb_any(skb);
655 			return ret;
656 		}
657 		if (extra_ies_len)
658 			memcpy(skb_put(skb, extra_ies_len), extra_ies,
659 			       extra_ies_len);
660 		mwifiex_tdls_add_link_ie(skb, peer, priv->curr_addr,
661 					 priv->cfg_bssid);
662 		break;
663 	}
664 
665 	switch (action_code) {
666 	case WLAN_TDLS_SETUP_REQUEST:
667 	case WLAN_TDLS_SETUP_RESPONSE:
668 		skb->priority = MWIFIEX_PRIO_BK;
669 		break;
670 	default:
671 		skb->priority = MWIFIEX_PRIO_VI;
672 		break;
673 	}
674 
675 	tx_info = MWIFIEX_SKB_TXCB(skb);
676 	memset(tx_info, 0, sizeof(*tx_info));
677 	tx_info->bss_num = priv->bss_num;
678 	tx_info->bss_type = priv->bss_type;
679 
680 	__net_timestamp(skb);
681 	mwifiex_queue_tx_pkt(priv, skb);
682 
683 	/* Delay 10ms to make sure tdls setup confirm/teardown frame
684 	 * is received by peer
685 	*/
686 	if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
687 	    action_code == WLAN_TDLS_TEARDOWN)
688 		msleep_interruptible(10);
689 
690 	return 0;
691 }
692 
693 static int
694 mwifiex_construct_tdls_action_frame(struct mwifiex_private *priv,
695 				    const u8 *peer,
696 				    u8 action_code, u8 dialog_token,
697 				    u16 status_code, struct sk_buff *skb)
698 {
699 	struct ieee80211_mgmt *mgmt;
700 	u8 bc_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
701 	int ret;
702 	u16 capab;
703 	struct ieee80211_ht_cap *ht_cap;
704 	u8 radio, *pos;
705 
706 	capab = priv->curr_bss_params.bss_descriptor.cap_info_bitmap;
707 
708 	mgmt = (void *)skb_put(skb, offsetof(struct ieee80211_mgmt, u));
709 
710 	memset(mgmt, 0, 24);
711 	memcpy(mgmt->da, peer, ETH_ALEN);
712 	memcpy(mgmt->sa, priv->curr_addr, ETH_ALEN);
713 	memcpy(mgmt->bssid, priv->cfg_bssid, ETH_ALEN);
714 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
715 					  IEEE80211_STYPE_ACTION);
716 
717 	/* add address 4 */
718 	pos = skb_put(skb, ETH_ALEN);
719 
720 	switch (action_code) {
721 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
722 		skb_put(skb, sizeof(mgmt->u.action.u.tdls_discover_resp) + 1);
723 		mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
724 		mgmt->u.action.u.tdls_discover_resp.action_code =
725 					      WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
726 		mgmt->u.action.u.tdls_discover_resp.dialog_token =
727 								   dialog_token;
728 		mgmt->u.action.u.tdls_discover_resp.capability =
729 							     cpu_to_le16(capab);
730 		/* move back for addr4 */
731 		memmove(pos + ETH_ALEN, &mgmt->u.action.category,
732 			sizeof(mgmt->u.action.u.tdls_discover_resp));
733 		/* init address 4 */
734 		memcpy(pos, bc_addr, ETH_ALEN);
735 
736 		ret = mwifiex_tdls_append_rates_ie(priv, skb);
737 		if (ret) {
738 			dev_kfree_skb_any(skb);
739 			return ret;
740 		}
741 
742 		pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
743 		*pos++ = WLAN_EID_HT_CAPABILITY;
744 		*pos++ = sizeof(struct ieee80211_ht_cap);
745 		ht_cap = (void *)pos;
746 		radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
747 		ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
748 		if (ret) {
749 			dev_kfree_skb_any(skb);
750 			return ret;
751 		}
752 
753 		if (priv->adapter->is_hw_11ac_capable) {
754 			ret = mwifiex_tdls_add_vht_capab(priv, skb);
755 			if (ret) {
756 				dev_kfree_skb_any(skb);
757 				return ret;
758 			}
759 			mwifiex_tdls_add_aid(priv, skb);
760 		}
761 
762 		mwifiex_tdls_add_ext_capab(priv, skb);
763 		mwifiex_tdls_add_qos_capab(skb);
764 		break;
765 	default:
766 		mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS action frame type\n");
767 		return -EINVAL;
768 	}
769 
770 	return 0;
771 }
772 
773 int mwifiex_send_tdls_action_frame(struct mwifiex_private *priv, const u8 *peer,
774 				   u8 action_code, u8 dialog_token,
775 				   u16 status_code, const u8 *extra_ies,
776 				   size_t extra_ies_len)
777 {
778 	struct sk_buff *skb;
779 	struct mwifiex_txinfo *tx_info;
780 	u8 *pos;
781 	u32 pkt_type, tx_control;
782 	u16 pkt_len, skb_len;
783 
784 	skb_len = MWIFIEX_MIN_DATA_HEADER_LEN +
785 		  max(sizeof(struct ieee80211_mgmt),
786 		      sizeof(struct ieee80211_tdls_data)) +
787 		  MWIFIEX_MGMT_FRAME_HEADER_SIZE +
788 		  MWIFIEX_SUPPORTED_RATES +
789 		  sizeof(struct ieee_types_extcap) +
790 		  sizeof(struct ieee80211_ht_cap) +
791 		  sizeof(struct ieee_types_bss_co_2040) +
792 		  sizeof(struct ieee80211_ht_operation) +
793 		  sizeof(struct ieee80211_tdls_lnkie) +
794 		  extra_ies_len +
795 		  3 + /* Qos Info */
796 		  ETH_ALEN; /* Address4 */
797 
798 	if (priv->adapter->is_hw_11ac_capable)
799 		skb_len += sizeof(struct ieee_types_vht_cap) +
800 			   sizeof(struct ieee_types_vht_oper) +
801 			   sizeof(struct ieee_types_aid);
802 
803 	skb = dev_alloc_skb(skb_len);
804 	if (!skb) {
805 		mwifiex_dbg(priv->adapter, ERROR,
806 			    "allocate skb failed for management frame\n");
807 		return -ENOMEM;
808 	}
809 
810 	skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
811 
812 	pkt_type = PKT_TYPE_MGMT;
813 	tx_control = 0;
814 	pos = skb_put(skb, MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(pkt_len));
815 	memset(pos, 0, MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(pkt_len));
816 	memcpy(pos, &pkt_type, sizeof(pkt_type));
817 	memcpy(pos + sizeof(pkt_type), &tx_control, sizeof(tx_control));
818 
819 	if (mwifiex_construct_tdls_action_frame(priv, peer, action_code,
820 						dialog_token, status_code,
821 						skb)) {
822 		dev_kfree_skb_any(skb);
823 		return -EINVAL;
824 	}
825 
826 	if (extra_ies_len)
827 		memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
828 
829 	/* the TDLS link IE is always added last we are the responder */
830 
831 	mwifiex_tdls_add_link_ie(skb, peer, priv->curr_addr,
832 				 priv->cfg_bssid);
833 
834 	skb->priority = MWIFIEX_PRIO_VI;
835 
836 	tx_info = MWIFIEX_SKB_TXCB(skb);
837 	memset(tx_info, 0, sizeof(*tx_info));
838 	tx_info->bss_num = priv->bss_num;
839 	tx_info->bss_type = priv->bss_type;
840 	tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
841 
842 	pkt_len = skb->len - MWIFIEX_MGMT_FRAME_HEADER_SIZE - sizeof(pkt_len);
843 	memcpy(skb->data + MWIFIEX_MGMT_FRAME_HEADER_SIZE, &pkt_len,
844 	       sizeof(pkt_len));
845 	__net_timestamp(skb);
846 	mwifiex_queue_tx_pkt(priv, skb);
847 
848 	return 0;
849 }
850 
851 /* This function process tdls action frame from peer.
852  * Peer capabilities are stored into station node structure.
853  */
854 void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
855 				       u8 *buf, int len)
856 {
857 	struct mwifiex_sta_node *sta_ptr;
858 	u8 *peer, *pos, *end;
859 	u8 i, action, basic;
860 	__le16 cap = 0;
861 	int ie_len = 0;
862 
863 	if (len < (sizeof(struct ethhdr) + 3))
864 		return;
865 	if (*(buf + sizeof(struct ethhdr)) != WLAN_TDLS_SNAP_RFTYPE)
866 		return;
867 	if (*(buf + sizeof(struct ethhdr) + 1) != WLAN_CATEGORY_TDLS)
868 		return;
869 
870 	peer = buf + ETH_ALEN;
871 	action = *(buf + sizeof(struct ethhdr) + 2);
872 	mwifiex_dbg(priv->adapter, DATA,
873 		    "rx:tdls action: peer=%pM, action=%d\n", peer, action);
874 
875 	switch (action) {
876 	case WLAN_TDLS_SETUP_REQUEST:
877 		if (len < (sizeof(struct ethhdr) + TDLS_REQ_FIX_LEN))
878 			return;
879 
880 		pos = buf + sizeof(struct ethhdr) + 4;
881 		/* payload 1+ category 1 + action 1 + dialog 1 */
882 		cap = cpu_to_le16(*(u16 *)pos);
883 		ie_len = len - sizeof(struct ethhdr) - TDLS_REQ_FIX_LEN;
884 		pos += 2;
885 		break;
886 
887 	case WLAN_TDLS_SETUP_RESPONSE:
888 		if (len < (sizeof(struct ethhdr) + TDLS_RESP_FIX_LEN))
889 			return;
890 		/* payload 1+ category 1 + action 1 + dialog 1 + status code 2*/
891 		pos = buf + sizeof(struct ethhdr) + 6;
892 		cap = cpu_to_le16(*(u16 *)pos);
893 		ie_len = len - sizeof(struct ethhdr) - TDLS_RESP_FIX_LEN;
894 		pos += 2;
895 		break;
896 
897 	case WLAN_TDLS_SETUP_CONFIRM:
898 		if (len < (sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN))
899 			return;
900 		pos = buf + sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN;
901 		ie_len = len - sizeof(struct ethhdr) - TDLS_CONFIRM_FIX_LEN;
902 		break;
903 	default:
904 		mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS frame type.\n");
905 		return;
906 	}
907 
908 	sta_ptr = mwifiex_add_sta_entry(priv, peer);
909 	if (!sta_ptr)
910 		return;
911 
912 	sta_ptr->tdls_cap.capab = cap;
913 
914 	for (end = pos + ie_len; pos + 1 < end; pos += 2 + pos[1]) {
915 		if (pos + 2 + pos[1] > end)
916 			break;
917 
918 		switch (*pos) {
919 		case WLAN_EID_SUPP_RATES:
920 			sta_ptr->tdls_cap.rates_len = pos[1];
921 			for (i = 0; i < pos[1]; i++)
922 				sta_ptr->tdls_cap.rates[i] = pos[i + 2];
923 			break;
924 
925 		case WLAN_EID_EXT_SUPP_RATES:
926 			basic = sta_ptr->tdls_cap.rates_len;
927 			for (i = 0; i < pos[1]; i++)
928 				sta_ptr->tdls_cap.rates[basic + i] = pos[i + 2];
929 			sta_ptr->tdls_cap.rates_len += pos[1];
930 			break;
931 		case WLAN_EID_HT_CAPABILITY:
932 			memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos,
933 			       sizeof(struct ieee80211_ht_cap));
934 			sta_ptr->is_11n_enabled = 1;
935 			break;
936 		case WLAN_EID_HT_OPERATION:
937 			memcpy(&sta_ptr->tdls_cap.ht_oper, pos,
938 			       sizeof(struct ieee80211_ht_operation));
939 			break;
940 		case WLAN_EID_BSS_COEX_2040:
941 			sta_ptr->tdls_cap.coex_2040 = pos[2];
942 			break;
943 		case WLAN_EID_EXT_CAPABILITY:
944 			memcpy((u8 *)&sta_ptr->tdls_cap.extcap, pos,
945 			       sizeof(struct ieee_types_header) +
946 			       min_t(u8, pos[1], 8));
947 			break;
948 		case WLAN_EID_RSN:
949 			memcpy((u8 *)&sta_ptr->tdls_cap.rsn_ie, pos,
950 			       sizeof(struct ieee_types_header) +
951 			       min_t(u8, pos[1], IEEE_MAX_IE_SIZE -
952 				     sizeof(struct ieee_types_header)));
953 			break;
954 		case WLAN_EID_QOS_CAPA:
955 			sta_ptr->tdls_cap.qos_info = pos[2];
956 			break;
957 		case WLAN_EID_VHT_OPERATION:
958 			if (priv->adapter->is_hw_11ac_capable)
959 				memcpy(&sta_ptr->tdls_cap.vhtoper, pos,
960 				       sizeof(struct ieee80211_vht_operation));
961 			break;
962 		case WLAN_EID_VHT_CAPABILITY:
963 			if (priv->adapter->is_hw_11ac_capable) {
964 				memcpy((u8 *)&sta_ptr->tdls_cap.vhtcap, pos,
965 				       sizeof(struct ieee80211_vht_cap));
966 				sta_ptr->is_11ac_enabled = 1;
967 			}
968 			break;
969 		case WLAN_EID_AID:
970 			if (priv->adapter->is_hw_11ac_capable)
971 				sta_ptr->tdls_cap.aid =
972 					      le16_to_cpu(*(__le16 *)(pos + 2));
973 		default:
974 			break;
975 		}
976 	}
977 
978 	return;
979 }
980 
981 static int
982 mwifiex_tdls_process_config_link(struct mwifiex_private *priv, const u8 *peer)
983 {
984 	struct mwifiex_sta_node *sta_ptr;
985 	struct mwifiex_ds_tdls_oper tdls_oper;
986 
987 	memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
988 	sta_ptr = mwifiex_get_sta_entry(priv, peer);
989 
990 	if (!sta_ptr || sta_ptr->tdls_status == TDLS_SETUP_FAILURE) {
991 		mwifiex_dbg(priv->adapter, ERROR,
992 			    "link absent for peer %pM; cannot config\n", peer);
993 		return -EINVAL;
994 	}
995 
996 	memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
997 	tdls_oper.tdls_action = MWIFIEX_TDLS_CONFIG_LINK;
998 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
999 				HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
1000 }
1001 
1002 static int
1003 mwifiex_tdls_process_create_link(struct mwifiex_private *priv, const u8 *peer)
1004 {
1005 	struct mwifiex_sta_node *sta_ptr;
1006 	struct mwifiex_ds_tdls_oper tdls_oper;
1007 
1008 	memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1009 	sta_ptr = mwifiex_get_sta_entry(priv, peer);
1010 
1011 	if (sta_ptr && sta_ptr->tdls_status == TDLS_SETUP_INPROGRESS) {
1012 		mwifiex_dbg(priv->adapter, WARN,
1013 			    "Setup already in progress for peer %pM\n", peer);
1014 		return 0;
1015 	}
1016 
1017 	sta_ptr = mwifiex_add_sta_entry(priv, peer);
1018 	if (!sta_ptr)
1019 		return -ENOMEM;
1020 
1021 	sta_ptr->tdls_status = TDLS_SETUP_INPROGRESS;
1022 	mwifiex_hold_tdls_packets(priv, peer);
1023 	memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
1024 	tdls_oper.tdls_action = MWIFIEX_TDLS_CREATE_LINK;
1025 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1026 				HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
1027 }
1028 
1029 static int
1030 mwifiex_tdls_process_disable_link(struct mwifiex_private *priv, const u8 *peer)
1031 {
1032 	struct mwifiex_sta_node *sta_ptr;
1033 	struct mwifiex_ds_tdls_oper tdls_oper;
1034 	unsigned long flags;
1035 
1036 	memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1037 	sta_ptr = mwifiex_get_sta_entry(priv, peer);
1038 
1039 	if (sta_ptr) {
1040 		if (sta_ptr->is_11n_enabled) {
1041 			mwifiex_11n_cleanup_reorder_tbl(priv);
1042 			spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
1043 					  flags);
1044 			mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1045 			spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1046 					       flags);
1047 		}
1048 		mwifiex_del_sta_entry(priv, peer);
1049 	}
1050 
1051 	mwifiex_restore_tdls_packets(priv, peer, TDLS_LINK_TEARDOWN);
1052 	mwifiex_auto_tdls_update_peer_status(priv, peer, TDLS_NOT_SETUP);
1053 	memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
1054 	tdls_oper.tdls_action = MWIFIEX_TDLS_DISABLE_LINK;
1055 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1056 				HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
1057 }
1058 
1059 static int
1060 mwifiex_tdls_process_enable_link(struct mwifiex_private *priv, const u8 *peer)
1061 {
1062 	struct mwifiex_sta_node *sta_ptr;
1063 	struct ieee80211_mcs_info mcs;
1064 	unsigned long flags;
1065 	int i;
1066 
1067 	sta_ptr = mwifiex_get_sta_entry(priv, peer);
1068 
1069 	if (sta_ptr && (sta_ptr->tdls_status != TDLS_SETUP_FAILURE)) {
1070 		mwifiex_dbg(priv->adapter, MSG,
1071 			    "tdls: enable link %pM success\n", peer);
1072 
1073 		sta_ptr->tdls_status = TDLS_SETUP_COMPLETE;
1074 
1075 		mcs = sta_ptr->tdls_cap.ht_capb.mcs;
1076 		if (mcs.rx_mask[0] != 0xff)
1077 			sta_ptr->is_11n_enabled = true;
1078 		if (sta_ptr->is_11n_enabled) {
1079 			if (le16_to_cpu(sta_ptr->tdls_cap.ht_capb.cap_info) &
1080 			    IEEE80211_HT_CAP_MAX_AMSDU)
1081 				sta_ptr->max_amsdu =
1082 					MWIFIEX_TX_DATA_BUF_SIZE_8K;
1083 			else
1084 				sta_ptr->max_amsdu =
1085 					MWIFIEX_TX_DATA_BUF_SIZE_4K;
1086 
1087 			for (i = 0; i < MAX_NUM_TID; i++)
1088 				sta_ptr->ampdu_sta[i] =
1089 					      priv->aggr_prio_tbl[i].ampdu_user;
1090 		} else {
1091 			for (i = 0; i < MAX_NUM_TID; i++)
1092 				sta_ptr->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
1093 		}
1094 		if (sta_ptr->tdls_cap.extcap.ext_capab[3] &
1095 		    WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH) {
1096 			mwifiex_config_tdls_enable(priv);
1097 			mwifiex_config_tdls_cs_params(priv);
1098 		}
1099 
1100 		memset(sta_ptr->rx_seq, 0xff, sizeof(sta_ptr->rx_seq));
1101 		mwifiex_restore_tdls_packets(priv, peer, TDLS_SETUP_COMPLETE);
1102 		mwifiex_auto_tdls_update_peer_status(priv, peer,
1103 						     TDLS_SETUP_COMPLETE);
1104 	} else {
1105 		mwifiex_dbg(priv->adapter, ERROR,
1106 			    "tdls: enable link %pM failed\n", peer);
1107 		if (sta_ptr) {
1108 			mwifiex_11n_cleanup_reorder_tbl(priv);
1109 			spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
1110 					  flags);
1111 			mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1112 			spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1113 					       flags);
1114 			mwifiex_del_sta_entry(priv, peer);
1115 		}
1116 		mwifiex_restore_tdls_packets(priv, peer, TDLS_LINK_TEARDOWN);
1117 		mwifiex_auto_tdls_update_peer_status(priv, peer,
1118 						     TDLS_NOT_SETUP);
1119 
1120 		return -1;
1121 	}
1122 
1123 	return 0;
1124 }
1125 
1126 int mwifiex_tdls_oper(struct mwifiex_private *priv, const u8 *peer, u8 action)
1127 {
1128 	switch (action) {
1129 	case MWIFIEX_TDLS_ENABLE_LINK:
1130 		return mwifiex_tdls_process_enable_link(priv, peer);
1131 	case MWIFIEX_TDLS_DISABLE_LINK:
1132 		return mwifiex_tdls_process_disable_link(priv, peer);
1133 	case MWIFIEX_TDLS_CREATE_LINK:
1134 		return mwifiex_tdls_process_create_link(priv, peer);
1135 	case MWIFIEX_TDLS_CONFIG_LINK:
1136 		return mwifiex_tdls_process_config_link(priv, peer);
1137 	}
1138 	return 0;
1139 }
1140 
1141 int mwifiex_get_tdls_link_status(struct mwifiex_private *priv, const u8 *mac)
1142 {
1143 	struct mwifiex_sta_node *sta_ptr;
1144 
1145 	sta_ptr = mwifiex_get_sta_entry(priv, mac);
1146 	if (sta_ptr)
1147 		return sta_ptr->tdls_status;
1148 
1149 	return TDLS_NOT_SETUP;
1150 }
1151 
1152 int mwifiex_get_tdls_list(struct mwifiex_private *priv,
1153 			  struct tdls_peer_info *buf)
1154 {
1155 	struct mwifiex_sta_node *sta_ptr;
1156 	struct tdls_peer_info *peer = buf;
1157 	int count = 0;
1158 	unsigned long flags;
1159 
1160 	if (!ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
1161 		return 0;
1162 
1163 	/* make sure we are in station mode and connected */
1164 	if (!(priv->bss_type == MWIFIEX_BSS_TYPE_STA && priv->media_connected))
1165 		return 0;
1166 
1167 	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
1168 	list_for_each_entry(sta_ptr, &priv->sta_list, list) {
1169 		if (mwifiex_is_tdls_link_setup(sta_ptr->tdls_status)) {
1170 			ether_addr_copy(peer->peer_addr, sta_ptr->mac_addr);
1171 			peer++;
1172 			count++;
1173 			if (count >= MWIFIEX_MAX_TDLS_PEER_SUPPORTED)
1174 				break;
1175 		}
1176 	}
1177 	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
1178 
1179 	return count;
1180 }
1181 
1182 void mwifiex_disable_all_tdls_links(struct mwifiex_private *priv)
1183 {
1184 	struct mwifiex_sta_node *sta_ptr;
1185 	struct mwifiex_ds_tdls_oper tdls_oper;
1186 	unsigned long flags;
1187 
1188 	if (list_empty(&priv->sta_list))
1189 		return;
1190 
1191 	list_for_each_entry(sta_ptr, &priv->sta_list, list) {
1192 		memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
1193 
1194 		if (sta_ptr->is_11n_enabled) {
1195 			mwifiex_11n_cleanup_reorder_tbl(priv);
1196 			spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
1197 					  flags);
1198 			mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
1199 			spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1200 					       flags);
1201 		}
1202 
1203 		mwifiex_restore_tdls_packets(priv, sta_ptr->mac_addr,
1204 					     TDLS_LINK_TEARDOWN);
1205 		memcpy(&tdls_oper.peer_mac, sta_ptr->mac_addr, ETH_ALEN);
1206 		tdls_oper.tdls_action = MWIFIEX_TDLS_DISABLE_LINK;
1207 		if (mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
1208 				     HostCmd_ACT_GEN_SET, 0, &tdls_oper, false))
1209 			mwifiex_dbg(priv->adapter, ERROR,
1210 				    "Disable link failed for TDLS peer %pM",
1211 				    sta_ptr->mac_addr);
1212 	}
1213 
1214 	mwifiex_del_all_sta_list(priv);
1215 }
1216 
1217 int mwifiex_tdls_check_tx(struct mwifiex_private *priv, struct sk_buff *skb)
1218 {
1219 	struct mwifiex_auto_tdls_peer *peer;
1220 	unsigned long flags;
1221 	u8 mac[ETH_ALEN];
1222 
1223 	ether_addr_copy(mac, skb->data);
1224 
1225 	spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1226 	list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1227 		if (!memcmp(mac, peer->mac_addr, ETH_ALEN)) {
1228 			if (peer->rssi <= MWIFIEX_TDLS_RSSI_HIGH &&
1229 			    peer->tdls_status == TDLS_NOT_SETUP &&
1230 			    (peer->failure_count <
1231 			     MWIFIEX_TDLS_MAX_FAIL_COUNT)) {
1232 				peer->tdls_status = TDLS_SETUP_INPROGRESS;
1233 				mwifiex_dbg(priv->adapter, INFO,
1234 					    "setup TDLS link, peer=%pM rssi=%d\n",
1235 					    peer->mac_addr, peer->rssi);
1236 
1237 				cfg80211_tdls_oper_request(priv->netdev,
1238 							   peer->mac_addr,
1239 							   NL80211_TDLS_SETUP,
1240 							   0, GFP_ATOMIC);
1241 				peer->do_setup = false;
1242 				priv->check_tdls_tx = false;
1243 			} else if (peer->failure_count <
1244 				   MWIFIEX_TDLS_MAX_FAIL_COUNT &&
1245 				   peer->do_discover) {
1246 				mwifiex_send_tdls_data_frame(priv,
1247 							     peer->mac_addr,
1248 						    WLAN_TDLS_DISCOVERY_REQUEST,
1249 							     1, 0, NULL, 0);
1250 				peer->do_discover = false;
1251 			}
1252 		}
1253 	}
1254 	spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1255 
1256 	return 0;
1257 }
1258 
1259 void mwifiex_flush_auto_tdls_list(struct mwifiex_private *priv)
1260 {
1261 	struct mwifiex_auto_tdls_peer *peer, *tmp_node;
1262 	unsigned long flags;
1263 
1264 	spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1265 	list_for_each_entry_safe(peer, tmp_node, &priv->auto_tdls_list, list) {
1266 		list_del(&peer->list);
1267 		kfree(peer);
1268 	}
1269 
1270 	INIT_LIST_HEAD(&priv->auto_tdls_list);
1271 	spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1272 	priv->check_tdls_tx = false;
1273 }
1274 
1275 void mwifiex_add_auto_tdls_peer(struct mwifiex_private *priv, const u8 *mac)
1276 {
1277 	struct mwifiex_auto_tdls_peer *tdls_peer;
1278 	unsigned long flags;
1279 
1280 	if (!priv->adapter->auto_tdls)
1281 		return;
1282 
1283 	spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1284 	list_for_each_entry(tdls_peer, &priv->auto_tdls_list, list) {
1285 		if (!memcmp(tdls_peer->mac_addr, mac, ETH_ALEN)) {
1286 			tdls_peer->tdls_status = TDLS_SETUP_INPROGRESS;
1287 			tdls_peer->rssi_jiffies = jiffies;
1288 			spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1289 			return;
1290 		}
1291 	}
1292 
1293 	/* create new TDLS peer */
1294 	tdls_peer = kzalloc(sizeof(*tdls_peer), GFP_ATOMIC);
1295 	if (tdls_peer) {
1296 		ether_addr_copy(tdls_peer->mac_addr, mac);
1297 		tdls_peer->tdls_status = TDLS_SETUP_INPROGRESS;
1298 		tdls_peer->rssi_jiffies = jiffies;
1299 		INIT_LIST_HEAD(&tdls_peer->list);
1300 		list_add_tail(&tdls_peer->list, &priv->auto_tdls_list);
1301 		mwifiex_dbg(priv->adapter, INFO,
1302 			    "Add auto TDLS peer= %pM to list\n", mac);
1303 	}
1304 
1305 	spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1306 }
1307 
1308 void mwifiex_auto_tdls_update_peer_status(struct mwifiex_private *priv,
1309 					  const u8 *mac, u8 link_status)
1310 {
1311 	struct mwifiex_auto_tdls_peer *peer;
1312 	unsigned long flags;
1313 
1314 	if (!priv->adapter->auto_tdls)
1315 		return;
1316 
1317 	spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1318 	list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1319 		if (!memcmp(peer->mac_addr, mac, ETH_ALEN)) {
1320 			if ((link_status == TDLS_NOT_SETUP) &&
1321 			    (peer->tdls_status == TDLS_SETUP_INPROGRESS))
1322 				peer->failure_count++;
1323 			else if (mwifiex_is_tdls_link_setup(link_status))
1324 				peer->failure_count = 0;
1325 
1326 			peer->tdls_status = link_status;
1327 			break;
1328 		}
1329 	}
1330 	spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1331 }
1332 
1333 void mwifiex_auto_tdls_update_peer_signal(struct mwifiex_private *priv,
1334 					  u8 *mac, s8 snr, s8 nflr)
1335 {
1336 	struct mwifiex_auto_tdls_peer *peer;
1337 	unsigned long flags;
1338 
1339 	if (!priv->adapter->auto_tdls)
1340 		return;
1341 
1342 	spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1343 	list_for_each_entry(peer, &priv->auto_tdls_list, list) {
1344 		if (!memcmp(peer->mac_addr, mac, ETH_ALEN)) {
1345 			peer->rssi = nflr - snr;
1346 			peer->rssi_jiffies = jiffies;
1347 			break;
1348 		}
1349 	}
1350 	spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1351 }
1352 
1353 void mwifiex_check_auto_tdls(unsigned long context)
1354 {
1355 	struct mwifiex_private *priv = (struct mwifiex_private *)context;
1356 	struct mwifiex_auto_tdls_peer *tdls_peer;
1357 	unsigned long flags;
1358 	u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;
1359 
1360 	if (WARN_ON_ONCE(!priv || !priv->adapter)) {
1361 		pr_err("mwifiex: %s: adapter or private structure is NULL\n",
1362 		       __func__);
1363 		return;
1364 	}
1365 
1366 	if (unlikely(!priv->adapter->auto_tdls))
1367 		return;
1368 
1369 	if (!priv->auto_tdls_timer_active) {
1370 		mwifiex_dbg(priv->adapter, INFO,
1371 			    "auto TDLS timer inactive; return");
1372 		return;
1373 	}
1374 
1375 	priv->check_tdls_tx = false;
1376 
1377 	if (list_empty(&priv->auto_tdls_list)) {
1378 		mod_timer(&priv->auto_tdls_timer,
1379 			  jiffies +
1380 			  msecs_to_jiffies(MWIFIEX_TIMER_10S));
1381 		return;
1382 	}
1383 
1384 	spin_lock_irqsave(&priv->auto_tdls_lock, flags);
1385 	list_for_each_entry(tdls_peer, &priv->auto_tdls_list, list) {
1386 		if ((jiffies - tdls_peer->rssi_jiffies) >
1387 		    (MWIFIEX_AUTO_TDLS_IDLE_TIME * HZ)) {
1388 			tdls_peer->rssi = 0;
1389 			tdls_peer->do_discover = true;
1390 			priv->check_tdls_tx = true;
1391 		}
1392 
1393 		if (((tdls_peer->rssi >= MWIFIEX_TDLS_RSSI_LOW) ||
1394 		     !tdls_peer->rssi) &&
1395 		    mwifiex_is_tdls_link_setup(tdls_peer->tdls_status)) {
1396 			tdls_peer->tdls_status = TDLS_LINK_TEARDOWN;
1397 			mwifiex_dbg(priv->adapter, MSG,
1398 				    "teardown TDLS link,peer=%pM rssi=%d\n",
1399 				    tdls_peer->mac_addr, -tdls_peer->rssi);
1400 			tdls_peer->do_discover = true;
1401 			priv->check_tdls_tx = true;
1402 			cfg80211_tdls_oper_request(priv->netdev,
1403 						   tdls_peer->mac_addr,
1404 						   NL80211_TDLS_TEARDOWN,
1405 						   reason, GFP_ATOMIC);
1406 		} else if (tdls_peer->rssi &&
1407 			   tdls_peer->rssi <= MWIFIEX_TDLS_RSSI_HIGH &&
1408 			   tdls_peer->tdls_status == TDLS_NOT_SETUP &&
1409 			   tdls_peer->failure_count <
1410 			   MWIFIEX_TDLS_MAX_FAIL_COUNT) {
1411 				priv->check_tdls_tx = true;
1412 				tdls_peer->do_setup = true;
1413 				mwifiex_dbg(priv->adapter, INFO,
1414 					    "check TDLS with peer=%pM\t"
1415 					    "rssi=%d\n", tdls_peer->mac_addr,
1416 					    tdls_peer->rssi);
1417 		}
1418 	}
1419 	spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
1420 
1421 	mod_timer(&priv->auto_tdls_timer,
1422 		  jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
1423 }
1424 
1425 void mwifiex_setup_auto_tdls_timer(struct mwifiex_private *priv)
1426 {
1427 	setup_timer(&priv->auto_tdls_timer, mwifiex_check_auto_tdls,
1428 		    (unsigned long)priv);
1429 	priv->auto_tdls_timer_active = true;
1430 	mod_timer(&priv->auto_tdls_timer,
1431 		  jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
1432 }
1433 
1434 void mwifiex_clean_auto_tdls(struct mwifiex_private *priv)
1435 {
1436 	if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
1437 	    priv->adapter->auto_tdls &&
1438 	    priv->bss_type == MWIFIEX_BSS_TYPE_STA) {
1439 		priv->auto_tdls_timer_active = false;
1440 		del_timer(&priv->auto_tdls_timer);
1441 		mwifiex_flush_auto_tdls_list(priv);
1442 	}
1443 }
1444 
1445 static int mwifiex_config_tdls(struct mwifiex_private *priv, u8 enable)
1446 {
1447 	struct mwifiex_tdls_config config;
1448 
1449 	config.enable = cpu_to_le16(enable);
1450 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_CONFIG,
1451 				ACT_TDLS_CS_ENABLE_CONFIG, 0, &config, true);
1452 }
1453 
1454 int mwifiex_config_tdls_enable(struct mwifiex_private *priv)
1455 {
1456 	return mwifiex_config_tdls(priv, true);
1457 }
1458 
1459 int mwifiex_config_tdls_disable(struct mwifiex_private *priv)
1460 {
1461 	return mwifiex_config_tdls(priv, false);
1462 }
1463 
1464 int mwifiex_config_tdls_cs_params(struct mwifiex_private *priv)
1465 {
1466 	struct mwifiex_tdls_config_cs_params config_tdls_cs_params;
1467 
1468 	config_tdls_cs_params.unit_time = MWIFIEX_DEF_CS_UNIT_TIME;
1469 	config_tdls_cs_params.thr_otherlink = MWIFIEX_DEF_CS_THR_OTHERLINK;
1470 	config_tdls_cs_params.thr_directlink = MWIFIEX_DEF_THR_DIRECTLINK;
1471 
1472 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_CONFIG,
1473 				ACT_TDLS_CS_PARAMS, 0,
1474 				&config_tdls_cs_params, true);
1475 }
1476 
1477 int mwifiex_stop_tdls_cs(struct mwifiex_private *priv, const u8 *peer_mac)
1478 {
1479 	struct mwifiex_tdls_stop_cs_params stop_tdls_cs_params;
1480 
1481 	ether_addr_copy(stop_tdls_cs_params.peer_mac, peer_mac);
1482 
1483 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_CONFIG,
1484 				ACT_TDLS_CS_STOP, 0,
1485 				&stop_tdls_cs_params, true);
1486 }
1487 
1488 int mwifiex_start_tdls_cs(struct mwifiex_private *priv, const u8 *peer_mac,
1489 			  u8 primary_chan, u8 second_chan_offset, u8 band)
1490 {
1491 	struct mwifiex_tdls_init_cs_params start_tdls_cs_params;
1492 
1493 	ether_addr_copy(start_tdls_cs_params.peer_mac, peer_mac);
1494 	start_tdls_cs_params.primary_chan = primary_chan;
1495 	start_tdls_cs_params.second_chan_offset = second_chan_offset;
1496 	start_tdls_cs_params.band = band;
1497 
1498 	start_tdls_cs_params.switch_time = cpu_to_le16(MWIFIEX_DEF_CS_TIME);
1499 	start_tdls_cs_params.switch_timeout =
1500 					cpu_to_le16(MWIFIEX_DEF_CS_TIMEOUT);
1501 	start_tdls_cs_params.reg_class = MWIFIEX_DEF_CS_REG_CLASS;
1502 	start_tdls_cs_params.periodicity = MWIFIEX_DEF_CS_PERIODICITY;
1503 
1504 	return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_CONFIG,
1505 				ACT_TDLS_CS_INIT, 0,
1506 				&start_tdls_cs_params, true);
1507 }
1508