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 
wfx_rate_mask_to_hw(struct wfx_dev * wdev,u32 rates)23 u32 wfx_rate_mask_to_hw(struct wfx_dev *wdev, u32 rates)
24 {
25 	int i;
26 	u32 ret = 0;
27 	/* The device only supports 2GHz */
28 	struct ieee80211_supported_band *sband = wdev->hw->wiphy->bands[NL80211_BAND_2GHZ];
29 
30 	for (i = 0; i < sband->n_bitrates; i++) {
31 		if (rates & BIT(i)) {
32 			if (i >= sband->n_bitrates)
33 				dev_warn(wdev->dev, "unsupported basic rate\n");
34 			else
35 				ret |= BIT(sband->bitrates[i].hw_value);
36 		}
37 	}
38 	return ret;
39 }
40 
wfx_cooling_timeout_work(struct work_struct * work)41 void wfx_cooling_timeout_work(struct work_struct *work)
42 {
43 	struct wfx_dev *wdev = container_of(to_delayed_work(work), struct wfx_dev,
44 					    cooling_timeout_work);
45 
46 	wdev->chip_frozen = true;
47 	wfx_tx_unlock(wdev);
48 }
49 
wfx_suspend_hot_dev(struct wfx_dev * wdev,enum sta_notify_cmd cmd)50 void wfx_suspend_hot_dev(struct wfx_dev *wdev, enum sta_notify_cmd cmd)
51 {
52 	if (cmd == STA_NOTIFY_AWAKE) {
53 		/* Device recover normal temperature */
54 		if (cancel_delayed_work(&wdev->cooling_timeout_work))
55 			wfx_tx_unlock(wdev);
56 	} else {
57 		/* Device is too hot */
58 		schedule_delayed_work(&wdev->cooling_timeout_work, 10 * HZ);
59 		wfx_tx_lock(wdev);
60 	}
61 }
62 
wfx_filter_beacon(struct wfx_vif * wvif,bool filter_beacon)63 static void wfx_filter_beacon(struct wfx_vif *wvif, bool filter_beacon)
64 {
65 	static const struct wfx_hif_ie_table_entry filter_ies[] = {
66 		{
67 			.ie_id        = WLAN_EID_VENDOR_SPECIFIC,
68 			.has_changed  = 1,
69 			.no_longer    = 1,
70 			.has_appeared = 1,
71 			.oui          = { 0x50, 0x6F, 0x9A },
72 		}, {
73 			.ie_id        = WLAN_EID_HT_OPERATION,
74 			.has_changed  = 1,
75 			.no_longer    = 1,
76 			.has_appeared = 1,
77 		}, {
78 			.ie_id        = WLAN_EID_ERP_INFO,
79 			.has_changed  = 1,
80 			.no_longer    = 1,
81 			.has_appeared = 1,
82 		}, {
83 			.ie_id        = WLAN_EID_CHANNEL_SWITCH,
84 			.has_changed  = 1,
85 			.no_longer    = 1,
86 			.has_appeared = 1,
87 		}
88 	};
89 
90 	if (!filter_beacon) {
91 		wfx_hif_beacon_filter_control(wvif, 0, 1);
92 	} else {
93 		wfx_hif_set_beacon_filter_table(wvif, ARRAY_SIZE(filter_ies), filter_ies);
94 		wfx_hif_beacon_filter_control(wvif, HIF_BEACON_FILTER_ENABLE, 0);
95 	}
96 }
97 
wfx_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 unused)98 void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
99 			  unsigned int *total_flags, u64 unused)
100 {
101 	bool filter_bssid, filter_prbreq, filter_beacon;
102 	struct ieee80211_vif *vif = NULL;
103 	struct wfx_dev *wdev = hw->priv;
104 	struct wfx_vif *wvif = NULL;
105 
106 	/* Notes:
107 	 *   - Probe responses (FIF_BCN_PRBRESP_PROMISC) are never filtered
108 	 *   - PS-Poll (FIF_PSPOLL) are never filtered
109 	 *   - RTS, CTS and Ack (FIF_CONTROL) are always filtered
110 	 *   - Broken frames (FIF_FCSFAIL and FIF_PLCPFAIL) are always filtered
111 	 *   - Firmware does (yet) allow to forward unicast traffic sent to other stations (aka.
112 	 *     promiscuous mode)
113 	 */
114 	*total_flags &= FIF_BCN_PRBRESP_PROMISC | FIF_ALLMULTI | FIF_OTHER_BSS |
115 			FIF_PROBE_REQ | FIF_PSPOLL;
116 
117 	mutex_lock(&wdev->conf_mutex);
118 	while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
119 		mutex_lock(&wvif->scan_lock);
120 
121 		/* Note: FIF_BCN_PRBRESP_PROMISC covers probe response and
122 		 * beacons from other BSS
123 		 */
124 		if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
125 			filter_beacon = false;
126 		else
127 			filter_beacon = true;
128 		wfx_filter_beacon(wvif, filter_beacon);
129 
130 		if (*total_flags & FIF_OTHER_BSS)
131 			filter_bssid = false;
132 		else
133 			filter_bssid = true;
134 
135 		vif = wvif_to_vif(wvif);
136 		/* In AP mode, chip can reply to probe request itself */
137 		if (*total_flags & FIF_PROBE_REQ && vif->type == NL80211_IFTYPE_AP) {
138 			dev_dbg(wdev->dev, "do not forward probe request in AP mode\n");
139 			*total_flags &= ~FIF_PROBE_REQ;
140 		}
141 
142 		if (*total_flags & FIF_PROBE_REQ)
143 			filter_prbreq = false;
144 		else
145 			filter_prbreq = true;
146 		wfx_hif_set_rx_filter(wvif, filter_bssid, filter_prbreq);
147 
148 		mutex_unlock(&wvif->scan_lock);
149 	}
150 	mutex_unlock(&wdev->conf_mutex);
151 }
152 
wfx_get_ps_timeout(struct wfx_vif * wvif,bool * enable_ps)153 static int wfx_get_ps_timeout(struct wfx_vif *wvif, bool *enable_ps)
154 {
155 	struct ieee80211_channel *chan0 = NULL, *chan1 = NULL;
156 	struct ieee80211_conf *conf = &wvif->wdev->hw->conf;
157 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
158 
159 	WARN(!vif->bss_conf.assoc && enable_ps,
160 	     "enable_ps is reliable only if associated");
161 	if (wdev_to_wvif(wvif->wdev, 0)) {
162 		struct wfx_vif *wvif_ch0 = wdev_to_wvif(wvif->wdev, 0);
163 		struct ieee80211_vif *vif_ch0 = wvif_to_vif(wvif_ch0);
164 
165 		chan0 = vif_ch0->bss_conf.chandef.chan;
166 	}
167 	if (wdev_to_wvif(wvif->wdev, 1)) {
168 		struct wfx_vif *wvif_ch1 = wdev_to_wvif(wvif->wdev, 1);
169 		struct ieee80211_vif *vif_ch1 = wvif_to_vif(wvif_ch1);
170 
171 		chan1 = vif_ch1->bss_conf.chandef.chan;
172 	}
173 	if (chan0 && chan1 && vif->type != NL80211_IFTYPE_AP) {
174 		if (chan0->hw_value == chan1->hw_value) {
175 			/* It is useless to enable PS if channels are the same. */
176 			if (enable_ps)
177 				*enable_ps = false;
178 			if (vif->bss_conf.assoc && vif->bss_conf.ps)
179 				dev_info(wvif->wdev->dev, "ignoring requested PS mode");
180 			return -1;
181 		}
182 		/* It is necessary to enable PS if channels are different. */
183 		if (enable_ps)
184 			*enable_ps = true;
185 		if (wfx_api_older_than(wvif->wdev, 3, 2))
186 			return 0;
187 		else
188 			return 30;
189 	}
190 	if (enable_ps)
191 		*enable_ps = vif->bss_conf.ps;
192 	if (vif->bss_conf.assoc && vif->bss_conf.ps)
193 		return conf->dynamic_ps_timeout;
194 	else
195 		return -1;
196 }
197 
wfx_update_pm(struct wfx_vif * wvif)198 int wfx_update_pm(struct wfx_vif *wvif)
199 {
200 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
201 	int ps_timeout;
202 	bool ps;
203 
204 	if (!vif->bss_conf.assoc)
205 		return 0;
206 	ps_timeout = wfx_get_ps_timeout(wvif, &ps);
207 	if (!ps)
208 		ps_timeout = 0;
209 	WARN_ON(ps_timeout < 0);
210 	if (wvif->uapsd_mask)
211 		ps_timeout = 0;
212 
213 	if (!wait_for_completion_timeout(&wvif->set_pm_mode_complete, TU_TO_JIFFIES(512)))
214 		dev_warn(wvif->wdev->dev, "timeout while waiting of set_pm_mode_complete\n");
215 	return wfx_hif_set_pm(wvif, ps, ps_timeout);
216 }
217 
wfx_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)218 int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
219 		u16 queue, const struct ieee80211_tx_queue_params *params)
220 {
221 	struct wfx_dev *wdev = hw->priv;
222 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
223 	int old_uapsd = wvif->uapsd_mask;
224 
225 	WARN_ON(queue >= hw->queues);
226 
227 	mutex_lock(&wdev->conf_mutex);
228 	assign_bit(queue, &wvif->uapsd_mask, params->uapsd);
229 	wfx_hif_set_edca_queue_params(wvif, queue, params);
230 	if (vif->type == NL80211_IFTYPE_STATION &&
231 	    old_uapsd != wvif->uapsd_mask) {
232 		wfx_hif_set_uapsd_info(wvif, wvif->uapsd_mask);
233 		wfx_update_pm(wvif);
234 	}
235 	mutex_unlock(&wdev->conf_mutex);
236 	return 0;
237 }
238 
wfx_set_rts_threshold(struct ieee80211_hw * hw,u32 value)239 int wfx_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
240 {
241 	struct wfx_dev *wdev = hw->priv;
242 	struct wfx_vif *wvif = NULL;
243 
244 	while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
245 		wfx_hif_rts_threshold(wvif, value);
246 	return 0;
247 }
248 
wfx_event_report_rssi(struct wfx_vif * wvif,u8 raw_rcpi_rssi)249 void wfx_event_report_rssi(struct wfx_vif *wvif, u8 raw_rcpi_rssi)
250 {
251 	/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
252 	 * RSSI = RCPI / 2 - 110
253 	 */
254 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
255 	int rcpi_rssi;
256 	int cqm_evt;
257 
258 	rcpi_rssi = raw_rcpi_rssi / 2 - 110;
259 	if (rcpi_rssi <= vif->bss_conf.cqm_rssi_thold)
260 		cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
261 	else
262 		cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
263 	ieee80211_cqm_rssi_notify(vif, cqm_evt, rcpi_rssi, GFP_KERNEL);
264 }
265 
wfx_beacon_loss_work(struct work_struct * work)266 static void wfx_beacon_loss_work(struct work_struct *work)
267 {
268 	struct wfx_vif *wvif = container_of(to_delayed_work(work), struct wfx_vif,
269 					    beacon_loss_work);
270 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
271 	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
272 
273 	ieee80211_beacon_loss(vif);
274 	schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(bss_conf->beacon_int));
275 }
276 
wfx_set_default_unicast_key(struct ieee80211_hw * hw,struct ieee80211_vif * vif,int idx)277 void wfx_set_default_unicast_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif, int idx)
278 {
279 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
280 
281 	wfx_hif_wep_default_key_id(wvif, idx);
282 }
283 
wfx_reset(struct wfx_vif * wvif)284 void wfx_reset(struct wfx_vif *wvif)
285 {
286 	struct wfx_dev *wdev = wvif->wdev;
287 
288 	wfx_tx_lock_flush(wdev);
289 	wfx_hif_reset(wvif, false);
290 	wfx_tx_policy_init(wvif);
291 	if (wvif_count(wdev) <= 1)
292 		wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
293 	wfx_tx_unlock(wdev);
294 	wvif->join_in_progress = false;
295 	cancel_delayed_work_sync(&wvif->beacon_loss_work);
296 	wvif =  NULL;
297 	while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
298 		wfx_update_pm(wvif);
299 }
300 
wfx_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)301 int wfx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta)
302 {
303 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
304 	struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *)&sta->drv_priv;
305 
306 	sta_priv->vif_id = wvif->id;
307 
308 	if (vif->type == NL80211_IFTYPE_STATION)
309 		wfx_hif_set_mfp(wvif, sta->mfp, sta->mfp);
310 
311 	/* In station mode, the firmware interprets new link-id as a TDLS peer */
312 	if (vif->type == NL80211_IFTYPE_STATION && !sta->tdls)
313 		return 0;
314 	sta_priv->link_id = ffz(wvif->link_id_map);
315 	wvif->link_id_map |= BIT(sta_priv->link_id);
316 	WARN_ON(!sta_priv->link_id);
317 	WARN_ON(sta_priv->link_id >= HIF_LINK_ID_MAX);
318 	wfx_hif_map_link(wvif, false, sta->addr, sta_priv->link_id, sta->mfp);
319 
320 	return 0;
321 }
322 
wfx_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)323 int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta)
324 {
325 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
326 	struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *)&sta->drv_priv;
327 
328 	/* See note in wfx_sta_add() */
329 	if (!sta_priv->link_id)
330 		return 0;
331 	/* FIXME add a mutex? */
332 	wfx_hif_map_link(wvif, true, sta->addr, sta_priv->link_id, false);
333 	wvif->link_id_map &= ~BIT(sta_priv->link_id);
334 	return 0;
335 }
336 
wfx_upload_ap_templates(struct wfx_vif * wvif)337 static int wfx_upload_ap_templates(struct wfx_vif *wvif)
338 {
339 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
340 	struct sk_buff *skb;
341 
342 	skb = ieee80211_beacon_get(wvif->wdev->hw, vif);
343 	if (!skb)
344 		return -ENOMEM;
345 	wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_BCN, API_RATE_INDEX_B_1MBPS);
346 	dev_kfree_skb(skb);
347 
348 	skb = ieee80211_proberesp_get(wvif->wdev->hw, vif);
349 	if (!skb)
350 		return -ENOMEM;
351 	wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_PRBRES, API_RATE_INDEX_B_1MBPS);
352 	dev_kfree_skb(skb);
353 	return 0;
354 }
355 
wfx_set_mfp_ap(struct wfx_vif * wvif)356 static void wfx_set_mfp_ap(struct wfx_vif *wvif)
357 {
358 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
359 	struct sk_buff *skb = ieee80211_beacon_get(wvif->wdev->hw, vif);
360 	const int ieoffset = offsetof(struct ieee80211_mgmt, u.beacon.variable);
361 	const u16 *ptr = (u16 *)cfg80211_find_ie(WLAN_EID_RSN, skb->data + ieoffset,
362 						 skb->len - ieoffset);
363 	const int pairwise_cipher_suite_count_offset = 8 / sizeof(u16);
364 	const int pairwise_cipher_suite_size = 4 / sizeof(u16);
365 	const int akm_suite_size = 4 / sizeof(u16);
366 
367 	if (ptr) {
368 		ptr += pairwise_cipher_suite_count_offset;
369 		if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb)))
370 			return;
371 		ptr += 1 + pairwise_cipher_suite_size * *ptr;
372 		if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb)))
373 			return;
374 		ptr += 1 + akm_suite_size * *ptr;
375 		if (WARN_ON(ptr > (u16 *)skb_tail_pointer(skb)))
376 			return;
377 		wfx_hif_set_mfp(wvif, *ptr & BIT(7), *ptr & BIT(6));
378 	}
379 }
380 
wfx_start_ap(struct ieee80211_hw * hw,struct ieee80211_vif * vif)381 int wfx_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
382 {
383 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
384 	struct wfx_dev *wdev = wvif->wdev;
385 	int ret;
386 
387 	wvif =  NULL;
388 	while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
389 		wfx_update_pm(wvif);
390 	wvif = (struct wfx_vif *)vif->drv_priv;
391 	wfx_upload_ap_templates(wvif);
392 	ret = wfx_hif_start(wvif, &vif->bss_conf, wvif->channel);
393 	if (ret > 0)
394 		return -EIO;
395 	wfx_set_mfp_ap(wvif);
396 	return ret;
397 }
398 
wfx_stop_ap(struct ieee80211_hw * hw,struct ieee80211_vif * vif)399 void wfx_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
400 {
401 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
402 
403 	wfx_reset(wvif);
404 }
405 
wfx_join(struct wfx_vif * wvif)406 static void wfx_join(struct wfx_vif *wvif)
407 {
408 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
409 	struct ieee80211_bss_conf *conf = &vif->bss_conf;
410 	struct cfg80211_bss *bss = NULL;
411 	u8 ssid[IEEE80211_MAX_SSID_LEN];
412 	const u8 *ssid_ie = NULL;
413 	int ssid_len = 0;
414 	int ret;
415 
416 	wfx_tx_lock_flush(wvif->wdev);
417 
418 	bss = cfg80211_get_bss(wvif->wdev->hw->wiphy, wvif->channel, conf->bssid, NULL, 0,
419 			       IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
420 	if (!bss && !conf->ibss_joined) {
421 		wfx_tx_unlock(wvif->wdev);
422 		return;
423 	}
424 
425 	rcu_read_lock(); /* protect ssid_ie */
426 	if (bss)
427 		ssid_ie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
428 	if (ssid_ie) {
429 		ssid_len = ssid_ie[1];
430 		if (ssid_len > IEEE80211_MAX_SSID_LEN)
431 			ssid_len = IEEE80211_MAX_SSID_LEN;
432 		memcpy(ssid, &ssid_ie[2], ssid_len);
433 	}
434 	rcu_read_unlock();
435 
436 	cfg80211_put_bss(wvif->wdev->hw->wiphy, bss);
437 
438 	wvif->join_in_progress = true;
439 	ret = wfx_hif_join(wvif, conf, wvif->channel, ssid, ssid_len);
440 	if (ret) {
441 		ieee80211_connection_loss(vif);
442 		wfx_reset(wvif);
443 	} else {
444 		/* Due to beacon filtering it is possible that the AP's beacon is not known for the
445 		 * mac80211 stack.  Disable filtering temporary to make sure the stack receives at
446 		 * least one
447 		 */
448 		wfx_filter_beacon(wvif, false);
449 	}
450 	wfx_tx_unlock(wvif->wdev);
451 }
452 
wfx_join_finalize(struct wfx_vif * wvif,struct ieee80211_bss_conf * info)453 static void wfx_join_finalize(struct wfx_vif *wvif, struct ieee80211_bss_conf *info)
454 {
455 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
456 	struct ieee80211_sta *sta = NULL;
457 	int ampdu_density = 0;
458 	bool greenfield = false;
459 
460 	rcu_read_lock(); /* protect sta */
461 	if (info->bssid && !info->ibss_joined)
462 		sta = ieee80211_find_sta(vif, info->bssid);
463 	if (sta && sta->deflink.ht_cap.ht_supported)
464 		ampdu_density = sta->deflink.ht_cap.ampdu_density;
465 	if (sta && sta->deflink.ht_cap.ht_supported &&
466 	    !(info->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT))
467 		greenfield = !!(sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD);
468 	rcu_read_unlock();
469 
470 	wvif->join_in_progress = false;
471 	wfx_hif_set_association_mode(wvif, ampdu_density, greenfield, info->use_short_preamble);
472 	wfx_hif_keep_alive_period(wvif, 0);
473 	/* beacon_loss_count is defined to 7 in net/mac80211/mlme.c. Let's use the same value. */
474 	wfx_hif_set_bss_params(wvif, info->aid, 7);
475 	wfx_hif_set_beacon_wakeup_period(wvif, 1, 1);
476 	wfx_update_pm(wvif);
477 }
478 
wfx_join_ibss(struct ieee80211_hw * hw,struct ieee80211_vif * vif)479 int wfx_join_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
480 {
481 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
482 
483 	wfx_upload_ap_templates(wvif);
484 	wfx_join(wvif);
485 	return 0;
486 }
487 
wfx_leave_ibss(struct ieee80211_hw * hw,struct ieee80211_vif * vif)488 void wfx_leave_ibss(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
489 {
490 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
491 
492 	wfx_reset(wvif);
493 }
494 
wfx_enable_beacon(struct wfx_vif * wvif,bool enable)495 static void wfx_enable_beacon(struct wfx_vif *wvif, bool enable)
496 {
497 	/* Driver has Content After DTIM Beacon in queue. Driver is waiting for a signal from the
498 	 * firmware. Since we are going to stop to send beacons, this signal will never happens. See
499 	 * also wfx_suspend_resume_mc()
500 	 */
501 	if (!enable && wfx_tx_queues_has_cab(wvif)) {
502 		wvif->after_dtim_tx_allowed = true;
503 		wfx_bh_request_tx(wvif->wdev);
504 	}
505 	wfx_hif_beacon_transmit(wvif, enable);
506 }
507 
wfx_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u32 changed)508 void wfx_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
509 			  struct ieee80211_bss_conf *info, u32 changed)
510 {
511 	struct wfx_dev *wdev = hw->priv;
512 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
513 	int i;
514 
515 	mutex_lock(&wdev->conf_mutex);
516 
517 	if (changed & BSS_CHANGED_BASIC_RATES ||
518 	    changed & BSS_CHANGED_BEACON_INT ||
519 	    changed & BSS_CHANGED_BSSID) {
520 		if (vif->type == NL80211_IFTYPE_STATION)
521 			wfx_join(wvif);
522 	}
523 
524 	if (changed & BSS_CHANGED_ASSOC) {
525 		if (info->assoc || info->ibss_joined)
526 			wfx_join_finalize(wvif, info);
527 		else if (!info->assoc && vif->type == NL80211_IFTYPE_STATION)
528 			wfx_reset(wvif);
529 		else
530 			dev_warn(wdev->dev, "misunderstood change: ASSOC\n");
531 	}
532 
533 	if (changed & BSS_CHANGED_BEACON_INFO) {
534 		if (vif->type != NL80211_IFTYPE_STATION)
535 			dev_warn(wdev->dev, "misunderstood change: BEACON_INFO\n");
536 		wfx_hif_set_beacon_wakeup_period(wvif, info->dtim_period, info->dtim_period);
537 		/* We temporary forwarded beacon for join process. It is now no more necessary. */
538 		wfx_filter_beacon(wvif, true);
539 	}
540 
541 	if (changed & BSS_CHANGED_ARP_FILTER) {
542 		for (i = 0; i < HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES; i++) {
543 			__be32 *arp_addr = &info->arp_addr_list[i];
544 
545 			if (info->arp_addr_cnt > HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES)
546 				arp_addr = NULL;
547 			if (i >= info->arp_addr_cnt)
548 				arp_addr = NULL;
549 			wfx_hif_set_arp_ipv4_filter(wvif, i, arp_addr);
550 		}
551 	}
552 
553 	if (changed & BSS_CHANGED_AP_PROBE_RESP || changed & BSS_CHANGED_BEACON)
554 		wfx_upload_ap_templates(wvif);
555 
556 	if (changed & BSS_CHANGED_BEACON_ENABLED)
557 		wfx_enable_beacon(wvif, info->enable_beacon);
558 
559 	if (changed & BSS_CHANGED_KEEP_ALIVE)
560 		wfx_hif_keep_alive_period(wvif,
561 					  info->max_idle_period * USEC_PER_TU / USEC_PER_MSEC);
562 
563 	if (changed & BSS_CHANGED_ERP_CTS_PROT)
564 		wfx_hif_erp_use_protection(wvif, info->use_cts_prot);
565 
566 	if (changed & BSS_CHANGED_ERP_SLOT)
567 		wfx_hif_slot_time(wvif, info->use_short_slot ? 9 : 20);
568 
569 	if (changed & BSS_CHANGED_CQM)
570 		wfx_hif_set_rcpi_rssi_threshold(wvif, info->cqm_rssi_thold, info->cqm_rssi_hyst);
571 
572 	if (changed & BSS_CHANGED_TXPOWER)
573 		wfx_hif_set_output_power(wvif, info->txpower);
574 
575 	if (changed & BSS_CHANGED_PS)
576 		wfx_update_pm(wvif);
577 
578 	mutex_unlock(&wdev->conf_mutex);
579 }
580 
wfx_update_tim(struct wfx_vif * wvif)581 static int wfx_update_tim(struct wfx_vif *wvif)
582 {
583 	struct ieee80211_vif *vif = wvif_to_vif(wvif);
584 	struct sk_buff *skb;
585 	u16 tim_offset, tim_length;
586 	u8 *tim_ptr;
587 
588 	skb = ieee80211_beacon_get_tim(wvif->wdev->hw, vif, &tim_offset,
589 				       &tim_length);
590 	if (!skb)
591 		return -ENOENT;
592 	tim_ptr = skb->data + tim_offset;
593 
594 	if (tim_offset && tim_length >= 6) {
595 		/* Firmware handles DTIM counter internally */
596 		tim_ptr[2] = 0;
597 
598 		/* Set/reset aid0 bit */
599 		if (wfx_tx_queues_has_cab(wvif))
600 			tim_ptr[4] |= 1;
601 		else
602 			tim_ptr[4] &= ~1;
603 	}
604 
605 	wfx_hif_update_ie_beacon(wvif, tim_ptr, tim_length);
606 	dev_kfree_skb(skb);
607 
608 	return 0;
609 }
610 
wfx_update_tim_work(struct work_struct * work)611 static void wfx_update_tim_work(struct work_struct *work)
612 {
613 	struct wfx_vif *wvif = container_of(work, struct wfx_vif, update_tim_work);
614 
615 	wfx_update_tim(wvif);
616 }
617 
wfx_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)618 int wfx_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set)
619 {
620 	struct wfx_dev *wdev = hw->priv;
621 	struct wfx_sta_priv *sta_dev = (struct wfx_sta_priv *)&sta->drv_priv;
622 	struct wfx_vif *wvif = wdev_to_wvif(wdev, sta_dev->vif_id);
623 
624 	if (!wvif) {
625 		dev_warn(wdev->dev, "%s: received event for non-existent vif\n", __func__);
626 		return -EIO;
627 	}
628 	schedule_work(&wvif->update_tim_work);
629 	return 0;
630 }
631 
wfx_suspend_resume_mc(struct wfx_vif * wvif,enum sta_notify_cmd notify_cmd)632 void wfx_suspend_resume_mc(struct wfx_vif *wvif, enum sta_notify_cmd notify_cmd)
633 {
634 	struct wfx_vif *wvif_it;
635 
636 	if (notify_cmd != STA_NOTIFY_AWAKE)
637 		return;
638 
639 	/* Device won't be able to honor CAB if a scan is in progress on any interface. Prefer to
640 	 * skip this DTIM and wait for the next one.
641 	 */
642 	wvif_it = NULL;
643 	while ((wvif_it = wvif_iterate(wvif->wdev, wvif_it)) != NULL)
644 		if (mutex_is_locked(&wvif_it->scan_lock))
645 			return;
646 
647 	if (!wfx_tx_queues_has_cab(wvif) || wvif->after_dtim_tx_allowed)
648 		dev_warn(wvif->wdev->dev, "incorrect sequence (%d CAB in queue)",
649 			 wfx_tx_queues_has_cab(wvif));
650 	wvif->after_dtim_tx_allowed = true;
651 	wfx_bh_request_tx(wvif->wdev);
652 }
653 
wfx_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)654 int wfx_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
655 		     struct ieee80211_ampdu_params *params)
656 {
657 	/* Aggregation is implemented fully in firmware */
658 	switch (params->action) {
659 	case IEEE80211_AMPDU_RX_START:
660 	case IEEE80211_AMPDU_RX_STOP:
661 		/* Just acknowledge it to enable frame re-ordering */
662 		return 0;
663 	default:
664 		/* Leave the firmware doing its business for tx aggregation */
665 		return -EOPNOTSUPP;
666 	}
667 }
668 
wfx_add_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf)669 int wfx_add_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf)
670 {
671 	return 0;
672 }
673 
wfx_remove_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf)674 void wfx_remove_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf)
675 {
676 }
677 
wfx_change_chanctx(struct ieee80211_hw * hw,struct ieee80211_chanctx_conf * conf,u32 changed)678 void wfx_change_chanctx(struct ieee80211_hw *hw, struct ieee80211_chanctx_conf *conf, u32 changed)
679 {
680 }
681 
wfx_assign_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_chanctx_conf * conf)682 int wfx_assign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
683 			   struct ieee80211_chanctx_conf *conf)
684 {
685 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
686 	struct ieee80211_channel *ch = conf->def.chan;
687 
688 	WARN(wvif->channel, "channel overwrite");
689 	wvif->channel = ch;
690 
691 	return 0;
692 }
693 
wfx_unassign_vif_chanctx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_chanctx_conf * conf)694 void wfx_unassign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
695 			      struct ieee80211_chanctx_conf *conf)
696 {
697 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
698 	struct ieee80211_channel *ch = conf->def.chan;
699 
700 	WARN(wvif->channel != ch, "channel mismatch");
701 	wvif->channel = NULL;
702 }
703 
wfx_config(struct ieee80211_hw * hw,u32 changed)704 int wfx_config(struct ieee80211_hw *hw, u32 changed)
705 {
706 	return 0;
707 }
708 
wfx_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)709 int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
710 {
711 	int i;
712 	struct wfx_dev *wdev = hw->priv;
713 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
714 
715 	vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
716 			     IEEE80211_VIF_SUPPORTS_UAPSD |
717 			     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
718 
719 	mutex_lock(&wdev->conf_mutex);
720 
721 	switch (vif->type) {
722 	case NL80211_IFTYPE_STATION:
723 	case NL80211_IFTYPE_ADHOC:
724 	case NL80211_IFTYPE_AP:
725 		break;
726 	default:
727 		mutex_unlock(&wdev->conf_mutex);
728 		return -EOPNOTSUPP;
729 	}
730 
731 	wvif->wdev = wdev;
732 
733 	wvif->link_id_map = 1; /* link-id 0 is reserved for multicast */
734 	INIT_WORK(&wvif->update_tim_work, wfx_update_tim_work);
735 	INIT_DELAYED_WORK(&wvif->beacon_loss_work, wfx_beacon_loss_work);
736 
737 	init_completion(&wvif->set_pm_mode_complete);
738 	complete(&wvif->set_pm_mode_complete);
739 	INIT_WORK(&wvif->tx_policy_upload_work, wfx_tx_policy_upload_work);
740 
741 	mutex_init(&wvif->scan_lock);
742 	init_completion(&wvif->scan_complete);
743 	INIT_WORK(&wvif->scan_work, wfx_hw_scan_work);
744 
745 	wfx_tx_queues_init(wvif);
746 	wfx_tx_policy_init(wvif);
747 
748 	for (i = 0; i < ARRAY_SIZE(wdev->vif); i++) {
749 		if (!wdev->vif[i]) {
750 			wdev->vif[i] = vif;
751 			wvif->id = i;
752 			break;
753 		}
754 	}
755 	WARN(i == ARRAY_SIZE(wdev->vif), "try to instantiate more vif than supported");
756 
757 	wfx_hif_set_macaddr(wvif, vif->addr);
758 
759 	mutex_unlock(&wdev->conf_mutex);
760 
761 	wvif = NULL;
762 	while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
763 		/* Combo mode does not support Block Acks. We can re-enable them */
764 		if (wvif_count(wdev) == 1)
765 			wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
766 		else
767 			wfx_hif_set_block_ack_policy(wvif, 0x00, 0x00);
768 	}
769 	return 0;
770 }
771 
wfx_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)772 void wfx_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
773 {
774 	struct wfx_dev *wdev = hw->priv;
775 	struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
776 
777 	wait_for_completion_timeout(&wvif->set_pm_mode_complete, msecs_to_jiffies(300));
778 	wfx_tx_queues_check_empty(wvif);
779 
780 	mutex_lock(&wdev->conf_mutex);
781 	WARN(wvif->link_id_map != 1, "corrupted state");
782 
783 	wfx_hif_reset(wvif, false);
784 	wfx_hif_set_macaddr(wvif, NULL);
785 	wfx_tx_policy_init(wvif);
786 
787 	cancel_delayed_work_sync(&wvif->beacon_loss_work);
788 	wdev->vif[wvif->id] = NULL;
789 
790 	mutex_unlock(&wdev->conf_mutex);
791 
792 	wvif = NULL;
793 	while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
794 		/* Combo mode does not support Block Acks. We can re-enable them */
795 		if (wvif_count(wdev) == 1)
796 			wfx_hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
797 		else
798 			wfx_hif_set_block_ack_policy(wvif, 0x00, 0x00);
799 	}
800 }
801 
wfx_start(struct ieee80211_hw * hw)802 int wfx_start(struct ieee80211_hw *hw)
803 {
804 	return 0;
805 }
806 
wfx_stop(struct ieee80211_hw * hw)807 void wfx_stop(struct ieee80211_hw *hw)
808 {
809 	struct wfx_dev *wdev = hw->priv;
810 
811 	WARN_ON(!skb_queue_empty_lockless(&wdev->tx_pending));
812 }
813