1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Implementation of mac80211 API.
  4 *
  5 * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
  6 * Copyright (c) 2010, ST-Ericsson
  7 */
  8#include <linux/etherdevice.h>
  9#include <net/mac80211.h>
 10
 11#include "sta.h"
 12#include "wfx.h"
 13#include "fwio.h"
 14#include "bh.h"
 15#include "key.h"
 16#include "scan.h"
 17#include "debug.h"
 18#include "hif_tx.h"
 19#include "hif_tx_mib.h"
 20
 21#define HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES 2
 22
 23void wfx_cooling_timeout_work(struct work_struct *work)
 24{
 25	struct wfx_dev *wdev = container_of(to_delayed_work(work), struct wfx_dev,
 26					    cooling_timeout_work);
 27
 28	wdev->chip_frozen = true;
 29	wfx_tx_unlock(wdev);
 30}
 31
 32void wfx_suspend_hot_dev(struct wfx_dev *wdev, enum sta_notify_cmd cmd)
 33{
 34	if (cmd == STA_NOTIFY_AWAKE) {
 35		/* Device recover normal temperature */
 36		if (cancel_delayed_work(&wdev->cooling_timeout_work))
 37			wfx_tx_unlock(wdev);
 38	} else {
 39		/* Device is too hot */
 40		schedule_delayed_work(&wdev->cooling_timeout_work, 10 * HZ);
 41		wfx_tx_lock(wdev);
 42	}
 43}
 44
 45static void wfx_filter_beacon(struct wfx_vif *wvif, bool filter_beacon)
 46{
 47	static const struct wfx_hif_ie_table_entry filter_ies[] = {
 48		{
 49			.ie_id        = WLAN_EID_VENDOR_SPECIFIC,
 50			.has_changed  = 1,
 51			.no_longer    = 1,
 52			.has_appeared = 1,
 53			.oui          = { 0x50, 0x6F, 0x9A },
 54		}, {
 55			.ie_id        = WLAN_EID_HT_OPERATION,
 56			.has_changed  = 1,
 57			.no_longer    = 1,
 58			.has_appeared = 1,
 59		}, {
 60			.ie_id        = WLAN_EID_ERP_INFO,
 61			.has_changed  = 1,
 62			.no_longer    = 1,
 63			.has_appeared = 1,
 64		}, {
 65			.ie_id        = WLAN_EID_CHANNEL_SWITCH,
 66			.has_changed  = 1,
 67			.no_longer    = 1,
 68			.has_appeared = 1,
 69		}
 70	};
 71
 72	if (!filter_beacon) {
 73		wfx_hif_beacon_filter_control(wvif, 0, 1);
 74	} else {
 75		wfx_hif_set_beacon_filter_table(wvif, ARRAY_SIZE(filter_ies), filter_ies);
 76		wfx_hif_beacon_filter_control(wvif, HIF_BEACON_FILTER_ENABLE, 0);
 77	}
 78}
 79
 80void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
 81			  unsigned int *total_flags, u64 unused)
 82{
 83	bool filter_bssid, filter_prbreq, filter_beacon;
 84	struct ieee80211_vif *vif = NULL;
 85	struct wfx_dev *wdev = hw->priv;
 86	struct wfx_vif *wvif = NULL;
 87
 88	/* Notes:
 89	 *   - Probe responses (FIF_BCN_PRBRESP_PROMISC) are never filtered
 90	 *   - PS-Poll (FIF_PSPOLL) are never filtered
 91	 *   - RTS, CTS and Ack (FIF_CONTROL) are always filtered
 92	 *   - Broken frames (FIF_FCSFAIL and FIF_PLCPFAIL) are always filtered
 93	 *   - Firmware does (yet) allow to forward unicast traffic sent to other stations (aka.
 94	 *     promiscuous mode)
 95	 */
 96	*total_flags &= FIF_BCN_PRBRESP_PROMISC | FIF_ALLMULTI | FIF_OTHER_BSS |
 97			FIF_PROBE_REQ | FIF_PSPOLL;
 98
 99	/* Filters are ignored during the scan. No frames are filtered. */
100	if (mutex_is_locked(&wdev->scan_lock))
101		return;
102
103	mutex_lock(&wdev->conf_mutex);
104	while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
105		/* Note: FIF_BCN_PRBRESP_PROMISC covers probe response and
106		 * beacons from other BSS
107		 */
108		if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
109			filter_beacon = false;
110		else
111			filter_beacon = true;
112		wfx_filter_beacon(wvif, filter_beacon);
113
114		if (*total_flags & FIF_OTHER_BSS)
115			filter_bssid = false;
116		else
117			filter_bssid = true;
118
119		vif = wvif_to_vif(wvif);
120		/* In AP mode, chip can reply to probe request itself */
121		if (*total_flags & FIF_PROBE_REQ && vif->type == NL80211_IFTYPE_AP) {
122			dev_dbg(wdev->dev, "do not forward probe request in AP mode\n");
123			*total_flags &= ~FIF_PROBE_REQ;
124		}
125
126		if (*total_flags & FIF_PROBE_REQ)
127			filter_prbreq = false;
128		else
129			filter_prbreq = true;
130		wfx_hif_set_rx_filter(wvif, filter_bssid, filter_prbreq);
131	}
132	mutex_unlock(&wdev->conf_mutex);
133}
134
135static int wfx_get_ps_timeout(struct wfx_vif *wvif, bool *enable_ps)
136{
137	struct ieee80211_channel *chan0 = NULL, *chan1 = NULL;
138	struct ieee80211_conf *conf = &wvif->wdev->hw->conf;
139	struct ieee80211_vif *vif = wvif_to_vif(wvif);
140
141	WARN(!vif->cfg.assoc && enable_ps,
142	     "enable_ps is reliable only if associated");
143	if (wdev_to_wvif(wvif->wdev, 0)) {
144		struct wfx_vif *wvif_ch0 = wdev_to_wvif(wvif->wdev, 0);
145		struct ieee80211_vif *vif_ch0 = wvif_to_vif(wvif_ch0);
146
147		chan0 = vif_ch0->bss_conf.chanreq.oper.chan;
148	}
149	if (wdev_to_wvif(wvif->wdev, 1)) {
150		struct wfx_vif *wvif_ch1 = wdev_to_wvif(wvif->wdev, 1);
151		struct ieee80211_vif *vif_ch1 = wvif_to_vif(wvif_ch1);
152
153		chan1 = vif_ch1->bss_conf.chanreq.oper.chan;
154	}
155	if (chan0 && chan1 && vif->type != NL80211_IFTYPE_AP) {
156		if (chan0->hw_value == chan1->hw_value) {
157			/* It is useless to enable PS if channels are the same. */
158			if (enable_ps)
159				*enable_ps = false;
160			if (vif->cfg.assoc && vif->cfg.ps)
161				dev_info(wvif->wdev->dev, "ignoring requested PS mode");
162			return -1;
163		}
164		/* It is necessary to enable PS if channels are different. */
165		if (enable_ps)
166			*enable_ps = true;
167		if (wfx_api_older_than(wvif->wdev, 3, 2))
168			return 0;
169		else
170			return 30;
171	}
172	if (enable_ps)
173		*enable_ps = vif->cfg.ps;
174	if (vif->cfg.assoc && vif->cfg.ps)
175		return conf->dynamic_ps_timeout;
176	else
177		return -1;
178}
179
180int wfx_update_pm(struct wfx_vif *wvif)
181{
182	struct ieee80211_vif *vif = wvif_to_vif(wvif);
183	int ps_timeout;
184	bool ps;
185
186	if (!vif->cfg.assoc)
187		return 0;
188	ps_timeout = wfx_get_ps_timeout(wvif, &ps);
189	if (!ps)
190		ps_timeout = 0;
191	WARN_ON(ps_timeout < 0);
192	if (wvif->uapsd_mask)
193		ps_timeout = 0;
194
195	if (!wait_for_completion_timeout(&wvif->set_pm_mode_complete, TU_TO_JIFFIES(512)))
196		dev_warn(wvif->wdev->dev, "timeout while waiting of set_pm_mode_complete\n");
197	return wfx_hif_set_pm(wvif, ps, ps_timeout);
198}
199
200int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
201		unsigned int link_id, u16 queue,
202		const struct ieee80211_tx_queue_params *params)
203{
204	struct wfx_dev *wdev = hw->priv;
205	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
206	int old_uapsd = wvif->uapsd_mask;
207
208	WARN_ON(queue >= hw->queues);
209
210	mutex_lock(&wdev->conf_mutex);
211	assign_bit(queue, &wvif->uapsd_mask, params->uapsd);
212	wfx_hif_set_edca_queue_params(wvif, queue, params);
213	if (vif->type == NL80211_IFTYPE_STATION &&
214	    old_uapsd != wvif->uapsd_mask) {
215		wfx_hif_set_uapsd_info(wvif, wvif->uapsd_mask);
216		wfx_update_pm(wvif);
217	}
218	mutex_unlock(&wdev->conf_mutex);
219	return 0;
220}
221
222int wfx_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
223{
224	struct wfx_dev *wdev = hw->priv;
225	struct wfx_vif *wvif = NULL;
226
227	while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
228		wfx_hif_rts_threshold(wvif, value);
229	return 0;
230}
231
232void wfx_event_report_rssi(struct wfx_vif *wvif, u8 raw_rcpi_rssi)
233{
234	/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
235	 * RSSI = RCPI / 2 - 110
236	 */
237	struct ieee80211_vif *vif = wvif_to_vif(wvif);
238	int rcpi_rssi;
239	int cqm_evt;
240
241	rcpi_rssi = raw_rcpi_rssi / 2 - 110;
242	if (rcpi_rssi <= vif->bss_conf.cqm_rssi_thold)
243		cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
244	else
245		cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
246	ieee80211_cqm_rssi_notify(vif, cqm_evt, rcpi_rssi, GFP_KERNEL);
247}
248
249static void wfx_beacon_loss_work(struct work_struct *work)
250{
251	struct wfx_vif *wvif = container_of(to_delayed_work(work), struct wfx_vif,
252					    beacon_loss_work);
253	struct ieee80211_vif *vif = wvif_to_vif(wvif);
254	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
255
256	ieee80211_beacon_loss(vif);
257	schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(bss_conf->beacon_int));
258}
259
260void wfx_set_default_unicast_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, int idx)
261{
262	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
263
264	wfx_hif_wep_default_key_id(wvif, idx);
265}
266
267void wfx_reset(struct wfx_vif *wvif)
268{
269	struct wfx_dev *wdev = wvif->wdev;
270
271	wfx_tx_lock_flush(wdev);
272	wfx_hif_reset(wvif, false);
273	wfx_tx_policy_init(wvif);
274	if (wvif_count(wdev) <= 1)
275		wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
276	wfx_tx_unlock(wdev);
277	wvif->join_in_progress = false;
278	cancel_delayed_work_sync(&wvif->beacon_loss_work);
279	wvif =  NULL;
280	while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
281		wfx_update_pm(wvif);
282}
283
284int wfx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta)
285{
286	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
287	struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *)&sta->drv_priv;
288
289	sta_priv->vif_id = wvif->id;
290
291	if (vif->type == NL80211_IFTYPE_STATION)
292		wfx_hif_set_mfp(wvif, sta->mfp, sta->mfp);
293
294	/* In station mode, the firmware interprets new link-id as a TDLS peer */
295	if (vif->type == NL80211_IFTYPE_STATION && !sta->tdls)
296		return 0;
297	sta_priv->link_id = ffz(wvif->link_id_map);
298	wvif->link_id_map |= BIT(sta_priv->link_id);
299	WARN_ON(!sta_priv->link_id);
300	WARN_ON(sta_priv->link_id >= HIF_LINK_ID_MAX);
301	wfx_hif_map_link(wvif, false, sta->addr, sta_priv->link_id, sta->mfp);
302
303	return 0;
304}
305
306int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta)
307{
308	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
309	struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *)&sta->drv_priv;
310
311	/* See note in wfx_sta_add() */
312	if (!sta_priv->link_id)
313		return 0;
314	/* FIXME add a mutex? */
315	wfx_hif_map_link(wvif, true, sta->addr, sta_priv->link_id, false);
316	wvif->link_id_map &= ~BIT(sta_priv->link_id);
317	return 0;
318}
319
320static int wfx_upload_ap_templates(struct wfx_vif *wvif)
321{
322	struct ieee80211_vif *vif = wvif_to_vif(wvif);
323	struct sk_buff *skb;
324
325	skb = ieee80211_beacon_get(wvif->wdev->hw, vif, 0);
326	if (!skb)
327		return -ENOMEM;
328	wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_BCN, API_RATE_INDEX_B_1MBPS);
329	dev_kfree_skb(skb);
330
331	skb = ieee80211_proberesp_get(wvif->wdev->hw, vif);
332	if (!skb)
333		return -ENOMEM;
334	wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_PRBRES, API_RATE_INDEX_B_1MBPS);
335	dev_kfree_skb(skb);
336	return 0;
337}
338
339static int wfx_set_mfp_ap(struct wfx_vif *wvif)
340{
341	struct ieee80211_vif *vif = wvif_to_vif(wvif);
342	struct sk_buff *skb = ieee80211_beacon_get(wvif->wdev->hw, vif, 0);
343	const int ieoffset = offsetof(struct ieee80211_mgmt, u.beacon.variable);
344	const int pairwise_cipher_suite_count_offset = 8 / sizeof(u16);
345	const int pairwise_cipher_suite_size = 4 / sizeof(u16);
346	const int akm_suite_size = 4 / sizeof(u16);
347	int ret = -EINVAL;
348	const u16 *ptr;
349
350	if (unlikely(!skb))
351		return -ENOMEM;
352
353	ptr = (u16 *)cfg80211_find_ie(WLAN_EID_RSN, skb->data + ieoffset,
354				      skb->len - ieoffset);
355	if (!ptr) {
356		/* No RSN IE is fine in open networks */
357		ret = 0;
358		goto free_skb;
359	}
360
361	ptr += pairwise_cipher_suite_count_offset;
362	if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb)))
363		goto free_skb;
364
365	ptr += 1 + pairwise_cipher_suite_size * *ptr;
366	if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb)))
367		goto free_skb;
368
369	ptr += 1 + akm_suite_size * *ptr;
370	if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb)))
371		goto free_skb;
372
373	wfx_hif_set_mfp(wvif, *ptr & BIT(7), *ptr & BIT(6));
374	ret = 0;
375
376free_skb:
377	dev_kfree_skb(skb);
378	return ret;
379}
380
381int wfx_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
382		 struct ieee80211_bss_conf *link_conf)
383{
384	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
385	struct wfx_dev *wdev = wvif->wdev;
386	int ret;
387
388	wvif =  NULL;
389	while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
390		wfx_update_pm(wvif);
391	wvif = (struct wfx_vif *)vif->drv_priv;
392	wfx_upload_ap_templates(wvif);
393	ret = wfx_hif_start(wvif, &vif->bss_conf, wvif->channel);
394	if (ret > 0)
395		return -EIO;
396	return wfx_set_mfp_ap(wvif);
397}
398
399void wfx_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
400		 struct ieee80211_bss_conf *link_conf)
401{
402	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
403	struct wfx_dev *wdev = wvif->wdev;
404
405	wvif =  NULL;
406	while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
407		wfx_update_pm(wvif);
408	wvif = (struct wfx_vif *)vif->drv_priv;
409	wfx_reset(wvif);
410}
411
412static void wfx_join(struct wfx_vif *wvif)
413{
414	struct ieee80211_vif *vif = wvif_to_vif(wvif);
415	struct ieee80211_bss_conf *conf = &vif->bss_conf;
416	struct cfg80211_bss *bss = NULL;
417	u8 ssid[IEEE80211_MAX_SSID_LEN];
418	const u8 *ssid_ie = NULL;
419	int ssid_len = 0;
420	int ret;
421
422	wfx_tx_lock_flush(wvif->wdev);
423
424	bss = cfg80211_get_bss(wvif->wdev->hw->wiphy, wvif->channel, conf->bssid, NULL, 0,
425			       IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
426	if (!bss && !vif->cfg.ibss_joined) {
427		wfx_tx_unlock(wvif->wdev);
428		return;
429	}
430
431	rcu_read_lock(); /* protect ssid_ie */
432	if (bss)
433		ssid_ie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
434	if (ssid_ie) {
435		ssid_len = ssid_ie[1];
436		if (ssid_len > IEEE80211_MAX_SSID_LEN)
437			ssid_len = IEEE80211_MAX_SSID_LEN;
438		memcpy(ssid, &ssid_ie[2], ssid_len);
439	}
440	rcu_read_unlock();
441
442	cfg80211_put_bss(wvif->wdev->hw->wiphy, bss);
443
444	wvif->join_in_progress = true;
445	ret = wfx_hif_join(wvif, conf, wvif->channel, ssid, ssid_len);
446	if (ret) {
447		ieee80211_connection_loss(vif);
448		wfx_reset(wvif);
449	} else {
450		/* Due to beacon filtering it is possible that the AP's beacon is not known for the
451		 * mac80211 stack.  Disable filtering temporary to make sure the stack receives at
452		 * least one
453		 */
454		wfx_filter_beacon(wvif, false);
455	}
456	wfx_tx_unlock(wvif->wdev);
457}
458
459static void wfx_join_finalize(struct wfx_vif *wvif, struct ieee80211_bss_conf *info)
460{
461	struct ieee80211_vif *vif = wvif_to_vif(wvif);
462	struct ieee80211_sta *sta = NULL;
463	int ampdu_density = 0;
464	bool greenfield = false;
465
466	rcu_read_lock(); /* protect sta */
467	if (info->bssid && !vif->cfg.ibss_joined)
468		sta = ieee80211_find_sta(vif, info->bssid);
469	if (sta && sta->deflink.ht_cap.ht_supported)
470		ampdu_density = sta->deflink.ht_cap.ampdu_density;
471	if (sta && sta->deflink.ht_cap.ht_supported &&
472	    !(info->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT))
473		greenfield = !!(sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD);
474	rcu_read_unlock();
475
476	wvif->join_in_progress = false;
477	wfx_hif_set_association_mode(wvif, ampdu_density, greenfield, info->use_short_preamble);
478	wfx_hif_keep_alive_period(wvif, 0);
479	/* beacon_loss_count is defined to 7 in net/mac80211/mlme.c. Let's use the same value. */
480	wfx_hif_set_bss_params(wvif, vif->cfg.aid, 7);
481	wfx_hif_set_beacon_wakeup_period(wvif, 1, 1);
482	wfx_update_pm(wvif);
483}
484
485int wfx_join_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
486{
487	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
488
489	wfx_upload_ap_templates(wvif);
490	wfx_join(wvif);
491	return 0;
492}
493
494void wfx_leave_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
495{
496	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
497
498	wfx_reset(wvif);
499}
500
501static void wfx_enable_beacon(struct wfx_vif *wvif, bool enable)
502{
503	/* Driver has Content After DTIM Beacon in queue. Driver is waiting for a signal from the
504	 * firmware. Since we are going to stop to send beacons, this signal will never happens. See
505	 * also wfx_suspend_resume_mc()
506	 */
507	if (!enable && wfx_tx_queues_has_cab(wvif)) {
508		wvif->after_dtim_tx_allowed = true;
509		wfx_bh_request_tx(wvif->wdev);
510	}
511	wfx_hif_beacon_transmit(wvif, enable);
512}
513
514void wfx_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
515			  struct ieee80211_bss_conf *info, u64 changed)
516{
517	struct wfx_dev *wdev = hw->priv;
518	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
519	int i;
520
521	mutex_lock(&wdev->conf_mutex);
522
523	if (changed & BSS_CHANGED_BASIC_RATES ||
524	    changed & BSS_CHANGED_BEACON_INT ||
525	    changed & BSS_CHANGED_BSSID) {
526		if (vif->type == NL80211_IFTYPE_STATION)
527			wfx_join(wvif);
528	}
529
530	if (changed & BSS_CHANGED_ASSOC) {
531		if (vif->cfg.assoc || vif->cfg.ibss_joined)
532			wfx_join_finalize(wvif, info);
533		else if (!vif->cfg.assoc && vif->type == NL80211_IFTYPE_STATION)
534			wfx_reset(wvif);
535		else
536			dev_warn(wdev->dev, "misunderstood change: ASSOC\n");
537	}
538
539	if (changed & BSS_CHANGED_BEACON_INFO) {
540		if (vif->type != NL80211_IFTYPE_STATION)
541			dev_warn(wdev->dev, "misunderstood change: BEACON_INFO\n");
542		wfx_hif_set_beacon_wakeup_period(wvif, info->dtim_period, info->dtim_period);
543		/* We temporary forwarded beacon for join process. It is now no more necessary. */
544		wfx_filter_beacon(wvif, true);
545	}
546
547	if (changed & BSS_CHANGED_ARP_FILTER) {
548		for (i = 0; i < HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES; i++) {
549			__be32 *arp_addr = &vif->cfg.arp_addr_list[i];
550
551			if (vif->cfg.arp_addr_cnt > HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES)
552				arp_addr = NULL;
553			if (i >= vif->cfg.arp_addr_cnt)
554				arp_addr = NULL;
555			wfx_hif_set_arp_ipv4_filter(wvif, i, arp_addr);
556		}
557	}
558
559	if (changed & BSS_CHANGED_AP_PROBE_RESP || changed & BSS_CHANGED_BEACON)
560		wfx_upload_ap_templates(wvif);
561
562	if (changed & BSS_CHANGED_BEACON_ENABLED)
563		wfx_enable_beacon(wvif, info->enable_beacon);
564
565	if (changed & BSS_CHANGED_KEEP_ALIVE)
566		wfx_hif_keep_alive_period(wvif,
567					  info->max_idle_period * USEC_PER_TU / USEC_PER_MSEC);
568
569	if (changed & BSS_CHANGED_ERP_CTS_PROT)
570		wfx_hif_erp_use_protection(wvif, info->use_cts_prot);
571
572	if (changed & BSS_CHANGED_ERP_SLOT)
573		wfx_hif_slot_time(wvif, info->use_short_slot ? 9 : 20);
574
575	if (changed & BSS_CHANGED_CQM)
576		wfx_hif_set_rcpi_rssi_threshold(wvif, info->cqm_rssi_thold, info->cqm_rssi_hyst);
577
578	if (changed & BSS_CHANGED_TXPOWER)
579		wfx_hif_set_output_power(wvif, info->txpower);
580
581	if (changed & BSS_CHANGED_PS)
582		wfx_update_pm(wvif);
583
584	mutex_unlock(&wdev->conf_mutex);
585}
586
587static int wfx_update_tim(struct wfx_vif *wvif)
588{
589	struct ieee80211_vif *vif = wvif_to_vif(wvif);
590	struct sk_buff *skb;
591	u16 tim_offset, tim_length;
592	u8 *tim_ptr;
593
594	skb = ieee80211_beacon_get_tim(wvif->wdev->hw, vif, &tim_offset,
595				       &tim_length, 0);
596	if (!skb)
597		return -ENOENT;
598	tim_ptr = skb->data + tim_offset;
599
600	if (tim_offset && tim_length >= 6) {
601		/* Firmware handles DTIM counter internally */
602		tim_ptr[2] = 0;
603
604		/* Set/reset aid0 bit */
605		if (wfx_tx_queues_has_cab(wvif))
606			tim_ptr[4] |= 1;
607		else
608			tim_ptr[4] &= ~1;
609	}
610
611	wfx_hif_update_ie_beacon(wvif, tim_ptr, tim_length);
612	dev_kfree_skb(skb);
613
614	return 0;
615}
616
617static void wfx_update_tim_work(struct work_struct *work)
618{
619	struct wfx_vif *wvif = container_of(work, struct wfx_vif, update_tim_work);
620
621	wfx_update_tim(wvif);
622}
623
624int wfx_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set)
625{
626	struct wfx_dev *wdev = hw->priv;
627	struct wfx_sta_priv *sta_dev = (struct wfx_sta_priv *)&sta->drv_priv;
628	struct wfx_vif *wvif = wdev_to_wvif(wdev, sta_dev->vif_id);
629
630	if (!wvif) {
631		dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__);
632		return -EIO;
633	}
634	schedule_work(&wvif->update_tim_work);
635	return 0;
636}
637
638void wfx_suspend_resume_mc(struct wfx_vif *wvif, enum sta_notify_cmd notify_cmd)
639{
640	if (notify_cmd != STA_NOTIFY_AWAKE)
641		return;
642
643	/* Device won't be able to honor CAB if a scan is in progress on any interface. Prefer to
644	 * skip this DTIM and wait for the next one.
645	 */
646	if (mutex_is_locked(&wvif->wdev->scan_lock))
647		return;
648
649	if (!wfx_tx_queues_has_cab(wvif) || wvif->after_dtim_tx_allowed)
650		dev_warn(wvif->wdev->dev, "incorrect sequence (%d CAB in queue)",
651			 wfx_tx_queues_has_cab(wvif));
652	wvif->after_dtim_tx_allowed = true;
653	wfx_bh_request_tx(wvif->wdev);
654}
655
656int wfx_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
657		     struct ieee80211_ampdu_params *params)
658{
659	/* Aggregation is implemented fully in firmware */
660	switch (params->action) {
661	case IEEE80211_AMPDU_RX_START:
662	case IEEE80211_AMPDU_RX_STOP:
663		/* Just acknowledge it to enable frame re-ordering */
664		return 0;
665	default:
666		/* Leave the firmware doing its business for tx aggregation */
667		return -EOPNOTSUPP;
668	}
669}
670
671int wfx_add_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf)
672{
673	return 0;
674}
675
676void wfx_remove_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf)
677{
678}
679
680void wfx_change_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf, u32 changed)
681{
682}
683
684int wfx_assign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
685			   struct ieee80211_bss_conf *link_conf,
686			   struct ieee80211_chanctx_conf *conf)
687{
688	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
689	struct ieee80211_channel *ch = conf->def.chan;
690
691	WARN(wvif->channel, "channel overwrite");
692	wvif->channel = ch;
693
694	return 0;
695}
696
697void wfx_unassign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
698			      struct ieee80211_bss_conf *link_conf,
699			      struct ieee80211_chanctx_conf *conf)
700{
701	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
702	struct ieee80211_channel *ch = conf->def.chan;
703
704	WARN(wvif->channel != ch, "channel mismatch");
705	wvif->channel = NULL;
706}
707
708int wfx_config(struct ieee80211_hw *hw, u32 changed)
709{
710	return 0;
711}
712
713int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
714{
715	int i;
716	struct wfx_dev *wdev = hw->priv;
717	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
718
719	vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
720			     IEEE80211_VIF_SUPPORTS_UAPSD |
721			     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
722
723	mutex_lock(&wdev->conf_mutex);
724
725	switch (vif->type) {
726	case NL80211_IFTYPE_STATION:
727	case NL80211_IFTYPE_ADHOC:
728	case NL80211_IFTYPE_AP:
729		break;
730	default:
731		mutex_unlock(&wdev->conf_mutex);
732		return -EOPNOTSUPP;
733	}
734
735	wvif->wdev = wdev;
736
737	wvif->link_id_map = 1; /* link-id 0 is reserved for multicast */
738	INIT_WORK(&wvif->update_tim_work, wfx_update_tim_work);
739	INIT_DELAYED_WORK(&wvif->beacon_loss_work, wfx_beacon_loss_work);
740
741	init_completion(&wvif->set_pm_mode_complete);
742	complete(&wvif->set_pm_mode_complete);
743	INIT_WORK(&wvif->tx_policy_upload_work, wfx_tx_policy_upload_work);
744
745	init_completion(&wvif->scan_complete);
746	INIT_WORK(&wvif->scan_work, wfx_hw_scan_work);
747	INIT_WORK(&wvif->remain_on_channel_work, wfx_remain_on_channel_work);
748
749	wfx_tx_queues_init(wvif);
750	wfx_tx_policy_init(wvif);
751
752	for (i = 0; i < ARRAY_SIZE(wdev->vif); i++) {
753		if (!wdev->vif[i]) {
754			wdev->vif[i] = vif;
755			wvif->id = i;
756			break;
757		}
758	}
759	WARN(i == ARRAY_SIZE(wdev->vif), "try to instantiate more vif than supported");
760
761	wfx_hif_set_macaddr(wvif, vif->addr);
762
763	mutex_unlock(&wdev->conf_mutex);
764
765	wvif = NULL;
766	while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
767		/* Combo mode does not support Block Acks. We can re-enable them */
768		if (wvif_count(wdev) == 1)
769			wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
770		else
771			wfx_hif_set_block_ack_policy(wvif, 0x00, 0x00);
772	}
773	return 0;
774}
775
776void wfx_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
777{
778	struct wfx_dev *wdev = hw->priv;
779	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
780
781	wait_for_completion_timeout(&wvif->set_pm_mode_complete, msecs_to_jiffies(300));
782	wfx_tx_queues_check_empty(wvif);
783
784	mutex_lock(&wdev->conf_mutex);
785	WARN(wvif->link_id_map != 1, "corrupted state");
786
787	wfx_hif_reset(wvif, false);
788	wfx_hif_set_macaddr(wvif, NULL);
789	wfx_tx_policy_init(wvif);
790
791	cancel_delayed_work_sync(&wvif->beacon_loss_work);
792	wdev->vif[wvif->id] = NULL;
793
794	mutex_unlock(&wdev->conf_mutex);
795
796	wvif = NULL;
797	while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
798		/* Combo mode does not support Block Acks. We can re-enable them */
799		if (wvif_count(wdev) == 1)
800			wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
801		else
802			wfx_hif_set_block_ack_policy(wvif, 0x00, 0x00);
803	}
804}
805
806int wfx_start(struct ieee80211_hw *hw)
807{
808	return 0;
809}
810
811void wfx_stop(struct ieee80211_hw *hw, bool suspend)
812{
813	struct wfx_dev *wdev = hw->priv;
814
815	WARN_ON(!skb_queue_empty_lockless(&wdev->tx_pending));
816}