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