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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / wireless / st / cw1200 / sta.c
blob236022d4ae2a394f9772575739ab46cb9b923e83
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Mac80211 STA API for ST-Ericsson CW1200 drivers
4 *
5 * Copyright (c) 2010, ST-Ericsson
6 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
7 */
8
9 #include <linux/vmalloc.h>
10 #include <linux/sched.h>
11 #include <linux/firmware.h>
12 #include <linux/module.h>
13 #include <linux/etherdevice.h>
14
15 #include "cw1200.h"
16 #include "sta.h"
17 #include "fwio.h"
18 #include "bh.h"
19 #include "debug.h"
20
21 #ifndef ERP_INFO_BYTE_OFFSET
22 #define ERP_INFO_BYTE_OFFSET 2
23 #endif
24
25 static void cw1200_do_join(struct cw1200_common *priv);
26 static void cw1200_do_unjoin(struct cw1200_common *priv);
27
28 static int cw1200_upload_beacon(struct cw1200_common *priv);
29 static int cw1200_upload_pspoll(struct cw1200_common *priv);
30 static int cw1200_upload_null(struct cw1200_common *priv);
31 static int cw1200_upload_qosnull(struct cw1200_common *priv);
32 static int cw1200_start_ap(struct cw1200_common *priv);
33 static int cw1200_update_beaconing(struct cw1200_common *priv);
34 static int cw1200_enable_beaconing(struct cw1200_common *priv,
35 bool enable);
36 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
37 struct ieee80211_vif *vif,
38 enum sta_notify_cmd notify_cmd,
39 int link_id);
40 static int __cw1200_flush(struct cw1200_common *priv, bool drop);
41
42 static inline void __cw1200_free_event_queue(struct list_head *list)
43 {
44 struct cw1200_wsm_event *event, *tmp;
45 list_for_each_entry_safe(event, tmp, list, link) {
46 list_del(&event->link);
47 kfree(event);
48 }
49 }
50
51 /* ******************************************************************** */
52 /* STA API */
53
54 int cw1200_start(struct ieee80211_hw *dev)
55 {
56 struct cw1200_common *priv = dev->priv;
57 int ret = 0;
58
59 cw1200_pm_stay_awake(&priv->pm_state, HZ);
60
61 mutex_lock(&priv->conf_mutex);
62
63 /* default EDCA */
64 WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
65 WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
66 WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
67 WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
68 ret = wsm_set_edca_params(priv, &priv->edca);
69 if (ret)
70 goto out;
71
72 ret = cw1200_set_uapsd_param(priv, &priv->edca);
73 if (ret)
74 goto out;
75
76 priv->setbssparams_done = false;
77
78 memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
79 priv->mode = NL80211_IFTYPE_MONITOR;
80 priv->wep_default_key_id = -1;
81
82 priv->cqm_beacon_loss_count = 10;
83
84 ret = cw1200_setup_mac(priv);
85 if (ret)
86 goto out;
87
88 out:
89 mutex_unlock(&priv->conf_mutex);
90 return ret;
91 }
92
93 void cw1200_stop(struct ieee80211_hw *dev)
94 {
95 struct cw1200_common *priv = dev->priv;
96 LIST_HEAD(list);
97 int i;
98
99 wsm_lock_tx(priv);
100
101 while (down_trylock(&priv->scan.lock)) {
102 /* Scan is in progress. Force it to stop. */
103 priv->scan.req = NULL;
104 schedule();
105 }
106 up(&priv->scan.lock);
107
108 cancel_delayed_work_sync(&priv->scan.probe_work);
109 cancel_delayed_work_sync(&priv->scan.timeout);
110 cancel_delayed_work_sync(&priv->clear_recent_scan_work);
111 cancel_delayed_work_sync(&priv->join_timeout);
112 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
113 cancel_work_sync(&priv->unjoin_work);
114 cancel_delayed_work_sync(&priv->link_id_gc_work);
115 flush_workqueue(priv->workqueue);
116 del_timer_sync(&priv->mcast_timeout);
117 mutex_lock(&priv->conf_mutex);
118 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
119 priv->listening = false;
120
121 spin_lock(&priv->event_queue_lock);
122 list_splice_init(&priv->event_queue, &list);
123 spin_unlock(&priv->event_queue_lock);
124 __cw1200_free_event_queue(&list);
125
126
127 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
128 priv->join_pending = false;
129
130 for (i = 0; i < 4; i++)
131 cw1200_queue_clear(&priv->tx_queue[i]);
132 mutex_unlock(&priv->conf_mutex);
133 tx_policy_clean(priv);
134
135 /* HACK! */
136 if (atomic_xchg(&priv->tx_lock, 1) != 1)
137 pr_debug("[STA] TX is force-unlocked due to stop request.\n");
138
139 wsm_unlock_tx(priv);
140 atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
141 }
142
143 static int cw1200_bssloss_mitigation = 1;
144 module_param(cw1200_bssloss_mitigation, int, 0644);
145 MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
146
147
148 void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
149 int init, int good, int bad)
150 {
151 int tx = 0;
152
153 priv->delayed_link_loss = 0;
154 cancel_work_sync(&priv->bss_params_work);
155
156 pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
157 priv->bss_loss_state,
158 init, good, bad,
159 atomic_read(&priv->tx_lock),
160 priv->delayed_unjoin);
161
162 /* If we have a pending unjoin */
163 if (priv->delayed_unjoin)
164 return;
165
166 if (init) {
167 queue_delayed_work(priv->workqueue,
168 &priv->bss_loss_work,
169 HZ);
170 priv->bss_loss_state = 0;
171
172 /* Skip the confimration procedure in P2P case */
173 if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
174 tx = 1;
175 } else if (good) {
176 cancel_delayed_work_sync(&priv->bss_loss_work);
177 priv->bss_loss_state = 0;
178 queue_work(priv->workqueue, &priv->bss_params_work);
179 } else if (bad) {
180 /* XXX Should we just keep going until we time out? */
181 if (priv->bss_loss_state < 3)
182 tx = 1;
183 } else {
184 cancel_delayed_work_sync(&priv->bss_loss_work);
185 priv->bss_loss_state = 0;
186 }
187
188 /* Bypass mitigation if it's disabled */
189 if (!cw1200_bssloss_mitigation)
190 tx = 0;
191
192 /* Spit out a NULL packet to our AP if necessary */
193 if (tx) {
194 struct sk_buff *skb;
195
196 priv->bss_loss_state++;
197
198 skb = ieee80211_nullfunc_get(priv->hw, priv->vif, false);
199 WARN_ON(!skb);
200 if (skb)
201 cw1200_tx(priv->hw, NULL, skb);
202 }
203 }
204
205 int cw1200_add_interface(struct ieee80211_hw *dev,
206 struct ieee80211_vif *vif)
207 {
208 int ret;
209 struct cw1200_common *priv = dev->priv;
210 /* __le32 auto_calibration_mode = __cpu_to_le32(1); */
211
212 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
213 IEEE80211_VIF_SUPPORTS_UAPSD |
214 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
215
216 mutex_lock(&priv->conf_mutex);
217
218 if (priv->mode != NL80211_IFTYPE_MONITOR) {
219 mutex_unlock(&priv->conf_mutex);
220 return -EOPNOTSUPP;
221 }
222
223 switch (vif->type) {
224 case NL80211_IFTYPE_STATION:
225 case NL80211_IFTYPE_ADHOC:
226 case NL80211_IFTYPE_MESH_POINT:
227 case NL80211_IFTYPE_AP:
228 priv->mode = vif->type;
229 break;
230 default:
231 mutex_unlock(&priv->conf_mutex);
232 return -EOPNOTSUPP;
233 }
234
235 priv->vif = vif;
236 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
237 ret = cw1200_setup_mac(priv);
238 /* Enable auto-calibration */
239 /* Exception in subsequent channel switch; disabled.
240 * wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
241 * &auto_calibration_mode, sizeof(auto_calibration_mode));
242 */
243
244 mutex_unlock(&priv->conf_mutex);
245 return ret;
246 }
247
248 void cw1200_remove_interface(struct ieee80211_hw *dev,
249 struct ieee80211_vif *vif)
250 {
251 struct cw1200_common *priv = dev->priv;
252 struct wsm_reset reset = {
253 .reset_statistics = true,
254 };
255 int i;
256
257 mutex_lock(&priv->conf_mutex);
258 switch (priv->join_status) {
259 case CW1200_JOIN_STATUS_JOINING:
260 case CW1200_JOIN_STATUS_PRE_STA:
261 case CW1200_JOIN_STATUS_STA:
262 case CW1200_JOIN_STATUS_IBSS:
263 wsm_lock_tx(priv);
264 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
265 wsm_unlock_tx(priv);
266 break;
267 case CW1200_JOIN_STATUS_AP:
268 for (i = 0; priv->link_id_map; ++i) {
269 if (priv->link_id_map & BIT(i)) {
270 reset.link_id = i;
271 wsm_reset(priv, &reset);
272 priv->link_id_map &= ~BIT(i);
273 }
274 }
275 memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
276 priv->sta_asleep_mask = 0;
277 priv->enable_beacon = false;
278 priv->tx_multicast = false;
279 priv->aid0_bit_set = false;
280 priv->buffered_multicasts = false;
281 priv->pspoll_mask = 0;
282 reset.link_id = 0;
283 wsm_reset(priv, &reset);
284 break;
285 case CW1200_JOIN_STATUS_MONITOR:
286 cw1200_update_listening(priv, false);
287 break;
288 default:
289 break;
290 }
291 priv->vif = NULL;
292 priv->mode = NL80211_IFTYPE_MONITOR;
293 eth_zero_addr(priv->mac_addr);
294 memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
295 cw1200_free_keys(priv);
296 cw1200_setup_mac(priv);
297 priv->listening = false;
298 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
299 if (!__cw1200_flush(priv, true))
300 wsm_unlock_tx(priv);
301
302 mutex_unlock(&priv->conf_mutex);
303 }
304
305 int cw1200_change_interface(struct ieee80211_hw *dev,
306 struct ieee80211_vif *vif,
307 enum nl80211_iftype new_type,
308 bool p2p)
309 {
310 int ret = 0;
311 pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
312 p2p, vif->type, vif->p2p);
313
314 if (new_type != vif->type || vif->p2p != p2p) {
315 cw1200_remove_interface(dev, vif);
316 vif->type = new_type;
317 vif->p2p = p2p;
318 ret = cw1200_add_interface(dev, vif);
319 }
320
321 return ret;
322 }
323
324 int cw1200_config(struct ieee80211_hw *dev, u32 changed)
325 {
326 int ret = 0;
327 struct cw1200_common *priv = dev->priv;
328 struct ieee80211_conf *conf = &dev->conf;
329
330 pr_debug("CONFIG CHANGED: %08x\n", changed);
331
332 down(&priv->scan.lock);
333 mutex_lock(&priv->conf_mutex);
334 /* TODO: IEEE80211_CONF_CHANGE_QOS */
335 /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
336
337 if (changed & IEEE80211_CONF_CHANGE_POWER) {
338 priv->output_power = conf->power_level;
339 pr_debug("[STA] TX power: %d\n", priv->output_power);
340 wsm_set_output_power(priv, priv->output_power * 10);
341 }
342
343 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
344 (priv->channel != conf->chandef.chan)) {
345 struct ieee80211_channel *ch = conf->chandef.chan;
346 struct wsm_switch_channel channel = {
347 .channel_number = ch->hw_value,
348 };
349 pr_debug("[STA] Freq %d (wsm ch: %d).\n",
350 ch->center_freq, ch->hw_value);
351
352 /* __cw1200_flush() implicitly locks tx, if successful */
353 if (!__cw1200_flush(priv, false)) {
354 if (!wsm_switch_channel(priv, &channel)) {
355 ret = wait_event_timeout(priv->channel_switch_done,
356 !priv->channel_switch_in_progress,
357 3 * HZ);
358 if (ret) {
359 /* Already unlocks if successful */
360 priv->channel = ch;
361 ret = 0;
362 } else {
363 ret = -ETIMEDOUT;
364 }
365 } else {
366 /* Unlock if switch channel fails */
367 wsm_unlock_tx(priv);
368 }
369 }
370 }
371
372 if (changed & IEEE80211_CONF_CHANGE_PS) {
373 if (!(conf->flags & IEEE80211_CONF_PS))
374 priv->powersave_mode.mode = WSM_PSM_ACTIVE;
375 else if (conf->dynamic_ps_timeout <= 0)
376 priv->powersave_mode.mode = WSM_PSM_PS;
377 else
378 priv->powersave_mode.mode = WSM_PSM_FAST_PS;
379
380 /* Firmware requires that value for this 1-byte field must
381 * be specified in units of 500us. Values above the 128ms
382 * threshold are not supported.
383 */
384 if (conf->dynamic_ps_timeout >= 0x80)
385 priv->powersave_mode.fast_psm_idle_period = 0xFF;
386 else
387 priv->powersave_mode.fast_psm_idle_period =
388 conf->dynamic_ps_timeout << 1;
389
390 if (priv->join_status == CW1200_JOIN_STATUS_STA &&
391 priv->bss_params.aid)
392 cw1200_set_pm(priv, &priv->powersave_mode);
393 }
394
395 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
396 /* TBD: It looks like it's transparent
397 * there's a monitor interface present -- use this
398 * to determine for example whether to calculate
399 * timestamps for packets or not, do not use instead
400 * of filter flags!
401 */
402 }
403
404 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
405 struct wsm_operational_mode mode = {
406 .power_mode = cw1200_power_mode,
407 .disable_more_flag_usage = true,
408 };
409
410 wsm_lock_tx(priv);
411 /* Disable p2p-dev mode forced by TX request */
412 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
413 (conf->flags & IEEE80211_CONF_IDLE) &&
414 !priv->listening) {
415 cw1200_disable_listening(priv);
416 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
417 }
418 wsm_set_operational_mode(priv, &mode);
419 wsm_unlock_tx(priv);
420 }
421
422 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
423 pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
424 conf->long_frame_max_tx_count,
425 conf->short_frame_max_tx_count);
426 spin_lock_bh(&priv->tx_policy_cache.lock);
427 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
428 priv->short_frame_max_tx_count =
429 (conf->short_frame_max_tx_count < 0x0F) ?
430 conf->short_frame_max_tx_count : 0x0F;
431 priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
432 spin_unlock_bh(&priv->tx_policy_cache.lock);
433 }
434 mutex_unlock(&priv->conf_mutex);
435 up(&priv->scan.lock);
436 return ret;
437 }
438
439 void cw1200_update_filtering(struct cw1200_common *priv)
440 {
441 int ret;
442 bool bssid_filtering = !priv->rx_filter.bssid;
443 bool is_p2p = priv->vif && priv->vif->p2p;
444 bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
445
446 static struct wsm_beacon_filter_control bf_ctrl;
447 static struct wsm_mib_beacon_filter_table bf_tbl = {
448 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
449 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
450 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
451 WSM_BEACON_FILTER_IE_HAS_APPEARED,
452 .entry[0].oui[0] = 0x50,
453 .entry[0].oui[1] = 0x6F,
454 .entry[0].oui[2] = 0x9A,
455 .entry[1].ie_id = WLAN_EID_HT_OPERATION,
456 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
457 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
458 WSM_BEACON_FILTER_IE_HAS_APPEARED,
459 .entry[2].ie_id = WLAN_EID_ERP_INFO,
460 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
461 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
462 WSM_BEACON_FILTER_IE_HAS_APPEARED,
463 };
464
465 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
466 return;
467 else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
468 bssid_filtering = false;
469
470 if (priv->disable_beacon_filter) {
471 bf_ctrl.enabled = 0;
472 bf_ctrl.bcn_count = 1;
473 bf_tbl.num = __cpu_to_le32(0);
474 } else if (is_p2p || !is_sta) {
475 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
476 WSM_BEACON_FILTER_AUTO_ERP;
477 bf_ctrl.bcn_count = 0;
478 bf_tbl.num = __cpu_to_le32(2);
479 } else {
480 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
481 bf_ctrl.bcn_count = 0;
482 bf_tbl.num = __cpu_to_le32(3);
483 }
484
485 /* When acting as p2p client being connected to p2p GO, in order to
486 * receive frames from a different p2p device, turn off bssid filter.
487 *
488 * WARNING: FW dependency!
489 * This can only be used with FW WSM371 and its successors.
490 * In that FW version even with bssid filter turned off,
491 * device will block most of the unwanted frames.
492 */
493 if (is_p2p)
494 bssid_filtering = false;
495
496 ret = wsm_set_rx_filter(priv, &priv->rx_filter);
497 if (!ret)
498 ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
499 if (!ret)
500 ret = wsm_beacon_filter_control(priv, &bf_ctrl);
501 if (!ret)
502 ret = wsm_set_bssid_filtering(priv, bssid_filtering);
503 if (!ret)
504 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
505 if (ret)
506 wiphy_err(priv->hw->wiphy,
507 "Update filtering failed: %d.\n", ret);
508 return;
509 }
510
511 void cw1200_update_filtering_work(struct work_struct *work)
512 {
513 struct cw1200_common *priv =
514 container_of(work, struct cw1200_common,
515 update_filtering_work);
516
517 cw1200_update_filtering(priv);
518 }
519
520 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
521 {
522 struct cw1200_common *priv =
523 container_of(work, struct cw1200_common,
524 set_beacon_wakeup_period_work);
525
526 wsm_set_beacon_wakeup_period(priv,
527 priv->beacon_int * priv->join_dtim_period >
528 MAX_BEACON_SKIP_TIME_MS ? 1 :
529 priv->join_dtim_period, 0);
530 }
531
532 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
533 struct netdev_hw_addr_list *mc_list)
534 {
535 static u8 broadcast_ipv6[ETH_ALEN] = {
536 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
537 };
538 static u8 broadcast_ipv4[ETH_ALEN] = {
539 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
540 };
541 struct cw1200_common *priv = hw->priv;
542 struct netdev_hw_addr *ha;
543 int count = 0;
544
545 /* Disable multicast filtering */
546 priv->has_multicast_subscription = false;
547 memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
548
549 if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
550 return 0;
551
552 /* Enable if requested */
553 netdev_hw_addr_list_for_each(ha, mc_list) {
554 pr_debug("[STA] multicast: %pM\n", ha->addr);
555 memcpy(&priv->multicast_filter.macaddrs[count],
556 ha->addr, ETH_ALEN);
557 if (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
558 !ether_addr_equal(ha->addr, broadcast_ipv6))
559 priv->has_multicast_subscription = true;
560 count++;
561 }
562
563 if (count) {
564 priv->multicast_filter.enable = __cpu_to_le32(1);
565 priv->multicast_filter.num_addrs = __cpu_to_le32(count);
566 }
567
568 return netdev_hw_addr_list_count(mc_list);
569 }
570
571 void cw1200_configure_filter(struct ieee80211_hw *dev,
572 unsigned int changed_flags,
573 unsigned int *total_flags,
574 u64 multicast)
575 {
576 struct cw1200_common *priv = dev->priv;
577 bool listening = !!(*total_flags &
578 (FIF_OTHER_BSS |
579 FIF_BCN_PRBRESP_PROMISC |
580 FIF_PROBE_REQ));
581
582 *total_flags &= FIF_OTHER_BSS |
583 FIF_FCSFAIL |
584 FIF_BCN_PRBRESP_PROMISC |
585 FIF_PROBE_REQ;
586
587 down(&priv->scan.lock);
588 mutex_lock(&priv->conf_mutex);
589
590 priv->rx_filter.promiscuous = 0;
591 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
592 FIF_PROBE_REQ)) ? 1 : 0;
593 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
594 priv->disable_beacon_filter = !(*total_flags &
595 (FIF_BCN_PRBRESP_PROMISC |
596 FIF_PROBE_REQ));
597 if (priv->listening != listening) {
598 priv->listening = listening;
599 wsm_lock_tx(priv);
600 cw1200_update_listening(priv, listening);
601 wsm_unlock_tx(priv);
602 }
603 cw1200_update_filtering(priv);
604 mutex_unlock(&priv->conf_mutex);
605 up(&priv->scan.lock);
606 }
607
608 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
609 u16 queue, const struct ieee80211_tx_queue_params *params)
610 {
611 struct cw1200_common *priv = dev->priv;
612 int ret = 0;
613 /* To prevent re-applying PM request OID again and again*/
614 bool old_uapsd_flags;
615
616 mutex_lock(&priv->conf_mutex);
617
618 if (queue < dev->queues) {
619 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
620
621 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
622 ret = wsm_set_tx_queue_params(priv,
623 &priv->tx_queue_params.params[queue], queue);
624 if (ret) {
625 ret = -EINVAL;
626 goto out;
627 }
628
629 WSM_EDCA_SET(&priv->edca, queue, params->aifs,
630 params->cw_min, params->cw_max,
631 params->txop, 0xc8,
632 params->uapsd);
633 ret = wsm_set_edca_params(priv, &priv->edca);
634 if (ret) {
635 ret = -EINVAL;
636 goto out;
637 }
638
639 if (priv->mode == NL80211_IFTYPE_STATION) {
640 ret = cw1200_set_uapsd_param(priv, &priv->edca);
641 if (!ret && priv->setbssparams_done &&
642 (priv->join_status == CW1200_JOIN_STATUS_STA) &&
643 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
644 ret = cw1200_set_pm(priv, &priv->powersave_mode);
645 }
646 } else {
647 ret = -EINVAL;
648 }
649
650 out:
651 mutex_unlock(&priv->conf_mutex);
652 return ret;
653 }
654
655 int cw1200_get_stats(struct ieee80211_hw *dev,
656 struct ieee80211_low_level_stats *stats)
657 {
658 struct cw1200_common *priv = dev->priv;
659
660 memcpy(stats, &priv->stats, sizeof(*stats));
661 return 0;
662 }
663
664 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
665 {
666 struct wsm_set_pm pm = *arg;
667
668 if (priv->uapsd_info.uapsd_flags != 0)
669 pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
670
671 if (memcmp(&pm, &priv->firmware_ps_mode,
672 sizeof(struct wsm_set_pm))) {
673 priv->firmware_ps_mode = pm;
674 return wsm_set_pm(priv, &pm);
675 } else {
676 return 0;
677 }
678 }
679
680 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
681 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
682 struct ieee80211_key_conf *key)
683 {
684 int ret = -EOPNOTSUPP;
685 struct cw1200_common *priv = dev->priv;
686 struct ieee80211_key_seq seq;
687
688 mutex_lock(&priv->conf_mutex);
689
690 if (cmd == SET_KEY) {
691 u8 *peer_addr = NULL;
692 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
693 1 : 0;
694 int idx = cw1200_alloc_key(priv);
695 struct wsm_add_key *wsm_key = &priv->keys[idx];
696
697 if (idx < 0) {
698 ret = -EINVAL;
699 goto finally;
700 }
701
702 if (sta)
703 peer_addr = sta->addr;
704
705 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE |
706 IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
707
708 switch (key->cipher) {
709 case WLAN_CIPHER_SUITE_WEP40:
710 case WLAN_CIPHER_SUITE_WEP104:
711 if (key->keylen > 16) {
712 cw1200_free_key(priv, idx);
713 ret = -EINVAL;
714 goto finally;
715 }
716
717 if (pairwise) {
718 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
719 memcpy(wsm_key->wep_pairwise.peer,
720 peer_addr, ETH_ALEN);
721 memcpy(wsm_key->wep_pairwise.keydata,
722 &key->key[0], key->keylen);
723 wsm_key->wep_pairwise.keylen = key->keylen;
724 } else {
725 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
726 memcpy(wsm_key->wep_group.keydata,
727 &key->key[0], key->keylen);
728 wsm_key->wep_group.keylen = key->keylen;
729 wsm_key->wep_group.keyid = key->keyidx;
730 }
731 break;
732 case WLAN_CIPHER_SUITE_TKIP:
733 ieee80211_get_key_rx_seq(key, 0, &seq);
734 if (pairwise) {
735 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
736 memcpy(wsm_key->tkip_pairwise.peer,
737 peer_addr, ETH_ALEN);
738 memcpy(wsm_key->tkip_pairwise.keydata,
739 &key->key[0], 16);
740 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
741 &key->key[16], 8);
742 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
743 &key->key[24], 8);
744 } else {
745 size_t mic_offset =
746 (priv->mode == NL80211_IFTYPE_AP) ?
747 16 : 24;
748 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
749 memcpy(wsm_key->tkip_group.keydata,
750 &key->key[0], 16);
751 memcpy(wsm_key->tkip_group.rx_mic_key,
752 &key->key[mic_offset], 8);
753
754 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
755 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
756 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
757 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
758 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
759 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
760 wsm_key->tkip_group.rx_seqnum[6] = 0;
761 wsm_key->tkip_group.rx_seqnum[7] = 0;
762
763 wsm_key->tkip_group.keyid = key->keyidx;
764 }
765 break;
766 case WLAN_CIPHER_SUITE_CCMP:
767 ieee80211_get_key_rx_seq(key, 0, &seq);
768 if (pairwise) {
769 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
770 memcpy(wsm_key->aes_pairwise.peer,
771 peer_addr, ETH_ALEN);
772 memcpy(wsm_key->aes_pairwise.keydata,
773 &key->key[0], 16);
774 } else {
775 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
776 memcpy(wsm_key->aes_group.keydata,
777 &key->key[0], 16);
778
779 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
780 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
781 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
782 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
783 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
784 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
785 wsm_key->aes_group.rx_seqnum[6] = 0;
786 wsm_key->aes_group.rx_seqnum[7] = 0;
787 wsm_key->aes_group.keyid = key->keyidx;
788 }
789 break;
790 case WLAN_CIPHER_SUITE_SMS4:
791 if (pairwise) {
792 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
793 memcpy(wsm_key->wapi_pairwise.peer,
794 peer_addr, ETH_ALEN);
795 memcpy(wsm_key->wapi_pairwise.keydata,
796 &key->key[0], 16);
797 memcpy(wsm_key->wapi_pairwise.mic_key,
798 &key->key[16], 16);
799 wsm_key->wapi_pairwise.keyid = key->keyidx;
800 } else {
801 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
802 memcpy(wsm_key->wapi_group.keydata,
803 &key->key[0], 16);
804 memcpy(wsm_key->wapi_group.mic_key,
805 &key->key[16], 16);
806 wsm_key->wapi_group.keyid = key->keyidx;
807 }
808 break;
809 default:
810 pr_warn("Unhandled key type %d\n", key->cipher);
811 cw1200_free_key(priv, idx);
812 ret = -EOPNOTSUPP;
813 goto finally;
814 }
815 ret = wsm_add_key(priv, wsm_key);
816 if (!ret)
817 key->hw_key_idx = idx;
818 else
819 cw1200_free_key(priv, idx);
820 } else if (cmd == DISABLE_KEY) {
821 struct wsm_remove_key wsm_key = {
822 .index = key->hw_key_idx,
823 };
824
825 if (wsm_key.index > WSM_KEY_MAX_INDEX) {
826 ret = -EINVAL;
827 goto finally;
828 }
829
830 cw1200_free_key(priv, wsm_key.index);
831 ret = wsm_remove_key(priv, &wsm_key);
832 } else {
833 pr_warn("Unhandled key command %d\n", cmd);
834 }
835
836 finally:
837 mutex_unlock(&priv->conf_mutex);
838 return ret;
839 }
840
841 void cw1200_wep_key_work(struct work_struct *work)
842 {
843 struct cw1200_common *priv =
844 container_of(work, struct cw1200_common, wep_key_work);
845 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
846 struct cw1200_queue *queue = &priv->tx_queue[queue_id];
847 __le32 wep_default_key_id = __cpu_to_le32(
848 priv->wep_default_key_id);
849
850 pr_debug("[STA] Setting default WEP key: %d\n",
851 priv->wep_default_key_id);
852 wsm_flush_tx(priv);
853 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
854 &wep_default_key_id, sizeof(wep_default_key_id));
855 cw1200_queue_requeue(queue, priv->pending_frame_id);
856 wsm_unlock_tx(priv);
857 }
858
859 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
860 {
861 int ret = 0;
862 __le32 val32;
863 struct cw1200_common *priv = hw->priv;
864
865 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
866 return 0;
867
868 if (value != (u32) -1)
869 val32 = __cpu_to_le32(value);
870 else
871 val32 = 0; /* disabled */
872
873 if (priv->rts_threshold == value)
874 goto out;
875
876 pr_debug("[STA] Setting RTS threshold: %d\n",
877 priv->rts_threshold);
878
879 /* mutex_lock(&priv->conf_mutex); */
880 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
881 &val32, sizeof(val32));
882 if (!ret)
883 priv->rts_threshold = value;
884 /* mutex_unlock(&priv->conf_mutex); */
885
886 out:
887 return ret;
888 }
889
890 /* If successful, LOCKS the TX queue! */
891 static int __cw1200_flush(struct cw1200_common *priv, bool drop)
892 {
893 int i, ret;
894
895 for (;;) {
896 /* TODO: correct flush handling is required when dev_stop.
897 * Temporary workaround: 2s
898 */
899 if (drop) {
900 for (i = 0; i < 4; ++i)
901 cw1200_queue_clear(&priv->tx_queue[i]);
902 } else {
903 ret = wait_event_timeout(
904 priv->tx_queue_stats.wait_link_id_empty,
905 cw1200_queue_stats_is_empty(
906 &priv->tx_queue_stats, -1),
907 2 * HZ);
908 }
909
910 if (!drop && ret <= 0) {
911 ret = -ETIMEDOUT;
912 break;
913 } else {
914 ret = 0;
915 }
916
917 wsm_lock_tx(priv);
918 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
919 /* Highly unlikely: WSM requeued frames. */
920 wsm_unlock_tx(priv);
921 continue;
922 }
923 break;
924 }
925 return ret;
926 }
927
928 void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
929 u32 queues, bool drop)
930 {
931 struct cw1200_common *priv = hw->priv;
932
933 switch (priv->mode) {
934 case NL80211_IFTYPE_MONITOR:
935 drop = true;
936 break;
937 case NL80211_IFTYPE_AP:
938 if (!priv->enable_beacon)
939 drop = true;
940 break;
941 }
942
943 if (!__cw1200_flush(priv, drop))
944 wsm_unlock_tx(priv);
945
946 return;
947 }
948
949 /* ******************************************************************** */
950 /* WSM callbacks */
951
952 void cw1200_free_event_queue(struct cw1200_common *priv)
953 {
954 LIST_HEAD(list);
955
956 spin_lock(&priv->event_queue_lock);
957 list_splice_init(&priv->event_queue, &list);
958 spin_unlock(&priv->event_queue_lock);
959
960 __cw1200_free_event_queue(&list);
961 }
962
963 void cw1200_event_handler(struct work_struct *work)
964 {
965 struct cw1200_common *priv =
966 container_of(work, struct cw1200_common, event_handler);
967 struct cw1200_wsm_event *event;
968 LIST_HEAD(list);
969
970 spin_lock(&priv->event_queue_lock);
971 list_splice_init(&priv->event_queue, &list);
972 spin_unlock(&priv->event_queue_lock);
973
974 list_for_each_entry(event, &list, link) {
975 switch (event->evt.id) {
976 case WSM_EVENT_ERROR:
977 pr_err("Unhandled WSM Error from LMAC\n");
978 break;
979 case WSM_EVENT_BSS_LOST:
980 pr_debug("[CQM] BSS lost.\n");
981 cancel_work_sync(&priv->unjoin_work);
982 if (!down_trylock(&priv->scan.lock)) {
983 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
984 up(&priv->scan.lock);
985 } else {
986 /* Scan is in progress. Delay reporting.
987 * Scan complete will trigger bss_loss_work
988 */
989 priv->delayed_link_loss = 1;
990 /* Also start a watchdog. */
991 queue_delayed_work(priv->workqueue,
992 &priv->bss_loss_work, 5*HZ);
993 }
994 break;
995 case WSM_EVENT_BSS_REGAINED:
996 pr_debug("[CQM] BSS regained.\n");
997 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
998 cancel_work_sync(&priv->unjoin_work);
999 break;
1000 case WSM_EVENT_RADAR_DETECTED:
1001 wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1002 break;
1003 case WSM_EVENT_RCPI_RSSI:
1004 {
1005 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1006 * RSSI = RCPI / 2 - 110
1007 */
1008 int rcpi_rssi = (int)(event->evt.data & 0xFF);
1009 int cqm_evt;
1010 if (priv->cqm_use_rssi)
1011 rcpi_rssi = (s8)rcpi_rssi;
1012 else
1013 rcpi_rssi = rcpi_rssi / 2 - 110;
1014
1015 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1016 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1017 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1018 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1019 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, rcpi_rssi,
1020 GFP_KERNEL);
1021 break;
1022 }
1023 case WSM_EVENT_BT_INACTIVE:
1024 pr_warn("Unhandled BT INACTIVE from LMAC\n");
1025 break;
1026 case WSM_EVENT_BT_ACTIVE:
1027 pr_warn("Unhandled BT ACTIVE from LMAC\n");
1028 break;
1029 }
1030 }
1031 __cw1200_free_event_queue(&list);
1032 }
1033
1034 void cw1200_bss_loss_work(struct work_struct *work)
1035 {
1036 struct cw1200_common *priv =
1037 container_of(work, struct cw1200_common, bss_loss_work.work);
1038
1039 pr_debug("[CQM] Reporting connection loss.\n");
1040 wsm_lock_tx(priv);
1041 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1042 wsm_unlock_tx(priv);
1043 }
1044
1045 void cw1200_bss_params_work(struct work_struct *work)
1046 {
1047 struct cw1200_common *priv =
1048 container_of(work, struct cw1200_common, bss_params_work);
1049 mutex_lock(&priv->conf_mutex);
1050
1051 priv->bss_params.reset_beacon_loss = 1;
1052 wsm_set_bss_params(priv, &priv->bss_params);
1053 priv->bss_params.reset_beacon_loss = 0;
1054
1055 mutex_unlock(&priv->conf_mutex);
1056 }
1057
1058 /* ******************************************************************** */
1059 /* Internal API */
1060
1061 /* This function is called to Parse the SDD file
1062 * to extract listen_interval and PTA related information
1063 * sdd is a TLV: u8 id, u8 len, u8 data[]
1064 */
1065 static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1066 {
1067 const u8 *p = priv->sdd->data;
1068 int ret = 0;
1069
1070 while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1071 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1072 pr_warn("Malformed sdd structure\n");
1073 return -1;
1074 }
1075 switch (p[0]) {
1076 case SDD_PTA_CFG_ELT_ID: {
1077 u16 v;
1078 if (p[1] < 4) {
1079 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1080 ret = -1;
1081 break;
1082 }
1083 v = le16_to_cpu(*((__le16 *)(p + 2)));
1084 if (!v) /* non-zero means this is enabled */
1085 break;
1086
1087 v = le16_to_cpu(*((__le16 *)(p + 4)));
1088 priv->conf_listen_interval = (v >> 7) & 0x1F;
1089 pr_debug("PTA found; Listen Interval %d\n",
1090 priv->conf_listen_interval);
1091 break;
1092 }
1093 case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1094 u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1095 if (clk != priv->hw_refclk)
1096 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1097 clk, priv->hw_refclk);
1098 break;
1099 }
1100 default:
1101 break;
1102 }
1103 p += p[1] + 2;
1104 }
1105
1106 if (!priv->bt_present) {
1107 pr_debug("PTA element NOT found.\n");
1108 priv->conf_listen_interval = 0;
1109 }
1110 return ret;
1111 }
1112
1113 int cw1200_setup_mac(struct cw1200_common *priv)
1114 {
1115 int ret = 0;
1116
1117 /* NOTE: There is a bug in FW: it reports signal
1118 * as RSSI if RSSI subscription is enabled.
1119 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1120 *
1121 * NOTE2: RSSI based reports have been switched to RCPI, since
1122 * FW has a bug and RSSI reported values are not stable,
1123 * what can lead to signal level oscilations in user-end applications
1124 */
1125 struct wsm_rcpi_rssi_threshold threshold = {
1126 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1127 WSM_RCPI_RSSI_DONT_USE_UPPER |
1128 WSM_RCPI_RSSI_DONT_USE_LOWER,
1129 .rollingAverageCount = 16,
1130 };
1131
1132 struct wsm_configuration cfg = {
1133 .dot11StationId = &priv->mac_addr[0],
1134 };
1135
1136 /* Remember the decission here to make sure, we will handle
1137 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1138 */
1139 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1140 priv->cqm_use_rssi = true;
1141
1142 if (!priv->sdd) {
1143 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1144 if (ret) {
1145 pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1146 return ret;
1147 }
1148 cw1200_parse_sdd_file(priv);
1149 }
1150
1151 cfg.dpdData = priv->sdd->data;
1152 cfg.dpdData_size = priv->sdd->size;
1153 ret = wsm_configuration(priv, &cfg);
1154 if (ret)
1155 return ret;
1156
1157 /* Configure RSSI/SCPI reporting as RSSI. */
1158 wsm_set_rcpi_rssi_threshold(priv, &threshold);
1159
1160 return 0;
1161 }
1162
1163 static void cw1200_join_complete(struct cw1200_common *priv)
1164 {
1165 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1166
1167 priv->join_pending = false;
1168 if (priv->join_complete_status) {
1169 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1170 cw1200_update_listening(priv, priv->listening);
1171 cw1200_do_unjoin(priv);
1172 ieee80211_connection_loss(priv->vif);
1173 } else {
1174 if (priv->mode == NL80211_IFTYPE_ADHOC)
1175 priv->join_status = CW1200_JOIN_STATUS_IBSS;
1176 else
1177 priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1178 }
1179 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1180 }
1181
1182 void cw1200_join_complete_work(struct work_struct *work)
1183 {
1184 struct cw1200_common *priv =
1185 container_of(work, struct cw1200_common, join_complete_work);
1186 mutex_lock(&priv->conf_mutex);
1187 cw1200_join_complete(priv);
1188 mutex_unlock(&priv->conf_mutex);
1189 }
1190
1191 void cw1200_join_complete_cb(struct cw1200_common *priv,
1192 struct wsm_join_complete *arg)
1193 {
1194 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1195 arg->status);
1196
1197 if (cancel_delayed_work(&priv->join_timeout)) {
1198 priv->join_complete_status = arg->status;
1199 queue_work(priv->workqueue, &priv->join_complete_work);
1200 }
1201 }
1202
1203 /* MUST be called with tx_lock held! It will be unlocked for us. */
1204 static void cw1200_do_join(struct cw1200_common *priv)
1205 {
1206 const u8 *bssid;
1207 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1208 struct cfg80211_bss *bss = NULL;
1209 struct wsm_protected_mgmt_policy mgmt_policy;
1210 struct wsm_join join = {
1211 .mode = conf->ibss_joined ?
1212 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1213 .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1214 .probe_for_join = 1,
1215 .atim_window = 0,
1216 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1217 conf->basic_rates),
1218 };
1219 if (delayed_work_pending(&priv->join_timeout)) {
1220 pr_warn("[STA] - Join request already pending, skipping..\n");
1221 wsm_unlock_tx(priv);
1222 return;
1223 }
1224
1225 if (priv->join_status)
1226 cw1200_do_unjoin(priv);
1227
1228 bssid = priv->vif->bss_conf.bssid;
1229
1230 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0,
1231 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
1232
1233 if (!bss && !conf->ibss_joined) {
1234 wsm_unlock_tx(priv);
1235 return;
1236 }
1237
1238 mutex_lock(&priv->conf_mutex);
1239
1240 /* Under the conf lock: check scan status and
1241 * bail out if it is in progress.
1242 */
1243 if (atomic_read(&priv->scan.in_progress)) {
1244 wsm_unlock_tx(priv);
1245 goto done_put;
1246 }
1247
1248 priv->join_pending = true;
1249
1250 /* Sanity check basic rates */
1251 if (!join.basic_rate_set)
1252 join.basic_rate_set = 7;
1253
1254 /* Sanity check beacon interval */
1255 if (!priv->beacon_int)
1256 priv->beacon_int = 1;
1257
1258 join.beacon_interval = priv->beacon_int;
1259
1260 /* BT Coex related changes */
1261 if (priv->bt_present) {
1262 if (((priv->conf_listen_interval * 100) %
1263 priv->beacon_int) == 0)
1264 priv->listen_interval =
1265 ((priv->conf_listen_interval * 100) /
1266 priv->beacon_int);
1267 else
1268 priv->listen_interval =
1269 ((priv->conf_listen_interval * 100) /
1270 priv->beacon_int + 1);
1271 }
1272
1273 if (priv->hw->conf.ps_dtim_period)
1274 priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1275 join.dtim_period = priv->join_dtim_period;
1276
1277 join.channel_number = priv->channel->hw_value;
1278 join.band = (priv->channel->band == NL80211_BAND_5GHZ) ?
1279 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1280
1281 memcpy(join.bssid, bssid, sizeof(join.bssid));
1282
1283 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1284 join.bssid,
1285 join.dtim_period, priv->beacon_int);
1286
1287 if (!conf->ibss_joined) {
1288 const u8 *ssidie;
1289 rcu_read_lock();
1290 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1291 if (ssidie) {
1292 join.ssid_len = ssidie[1];
1293 memcpy(join.ssid, &ssidie[2], join.ssid_len);
1294 }
1295 rcu_read_unlock();
1296 }
1297
1298 if (priv->vif->p2p) {
1299 join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1300 join.basic_rate_set =
1301 cw1200_rate_mask_to_wsm(priv, 0xFF0);
1302 }
1303
1304 /* Enable asynchronous join calls */
1305 if (!conf->ibss_joined) {
1306 join.flags |= WSM_JOIN_FLAGS_FORCE;
1307 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1308 }
1309
1310 wsm_flush_tx(priv);
1311
1312 /* Stay Awake for Join and Auth Timeouts and a bit more */
1313 cw1200_pm_stay_awake(&priv->pm_state,
1314 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1315
1316 cw1200_update_listening(priv, false);
1317
1318 /* Turn on Block ACKs */
1319 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1320 priv->ba_rx_tid_mask);
1321
1322 /* Set up timeout */
1323 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1324 priv->join_status = CW1200_JOIN_STATUS_JOINING;
1325 queue_delayed_work(priv->workqueue,
1326 &priv->join_timeout,
1327 CW1200_JOIN_TIMEOUT);
1328 }
1329
1330 /* 802.11w protected mgmt frames */
1331 mgmt_policy.protectedMgmtEnable = 0;
1332 mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1333 mgmt_policy.encryptionForAuthFrame = 1;
1334 wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1335
1336 /* Perform actual join */
1337 if (wsm_join(priv, &join)) {
1338 pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1339 cancel_delayed_work_sync(&priv->join_timeout);
1340 cw1200_update_listening(priv, priv->listening);
1341 /* Tx lock still held, unjoin will clear it. */
1342 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1343 wsm_unlock_tx(priv);
1344 } else {
1345 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1346 cw1200_join_complete(priv); /* Will clear tx_lock */
1347
1348 /* Upload keys */
1349 cw1200_upload_keys(priv);
1350
1351 /* Due to beacon filtering it is possible that the
1352 * AP's beacon is not known for the mac80211 stack.
1353 * Disable filtering temporary to make sure the stack
1354 * receives at least one
1355 */
1356 priv->disable_beacon_filter = true;
1357 }
1358 cw1200_update_filtering(priv);
1359
1360 done_put:
1361 mutex_unlock(&priv->conf_mutex);
1362 if (bss)
1363 cfg80211_put_bss(priv->hw->wiphy, bss);
1364 }
1365
1366 void cw1200_join_timeout(struct work_struct *work)
1367 {
1368 struct cw1200_common *priv =
1369 container_of(work, struct cw1200_common, join_timeout.work);
1370 pr_debug("[WSM] Join timed out.\n");
1371 wsm_lock_tx(priv);
1372 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1373 wsm_unlock_tx(priv);
1374 }
1375
1376 static void cw1200_do_unjoin(struct cw1200_common *priv)
1377 {
1378 struct wsm_reset reset = {
1379 .reset_statistics = true,
1380 };
1381
1382 cancel_delayed_work_sync(&priv->join_timeout);
1383
1384 mutex_lock(&priv->conf_mutex);
1385 priv->join_pending = false;
1386
1387 if (atomic_read(&priv->scan.in_progress)) {
1388 if (priv->delayed_unjoin)
1389 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1390 else
1391 priv->delayed_unjoin = true;
1392 goto done;
1393 }
1394
1395 priv->delayed_link_loss = false;
1396
1397 if (!priv->join_status)
1398 goto done;
1399
1400 if (priv->join_status == CW1200_JOIN_STATUS_AP)
1401 goto done;
1402
1403 cancel_work_sync(&priv->update_filtering_work);
1404 cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1405 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1406
1407 /* Unjoin is a reset. */
1408 wsm_flush_tx(priv);
1409 wsm_keep_alive_period(priv, 0);
1410 wsm_reset(priv, &reset);
1411 wsm_set_output_power(priv, priv->output_power * 10);
1412 priv->join_dtim_period = 0;
1413 cw1200_setup_mac(priv);
1414 cw1200_free_event_queue(priv);
1415 cancel_work_sync(&priv->event_handler);
1416 cw1200_update_listening(priv, priv->listening);
1417 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1418
1419 /* Disable Block ACKs */
1420 wsm_set_block_ack_policy(priv, 0, 0);
1421
1422 priv->disable_beacon_filter = false;
1423 cw1200_update_filtering(priv);
1424 memset(&priv->association_mode, 0,
1425 sizeof(priv->association_mode));
1426 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1427 priv->setbssparams_done = false;
1428 memset(&priv->firmware_ps_mode, 0,
1429 sizeof(priv->firmware_ps_mode));
1430
1431 pr_debug("[STA] Unjoin completed.\n");
1432
1433 done:
1434 mutex_unlock(&priv->conf_mutex);
1435 }
1436
1437 void cw1200_unjoin_work(struct work_struct *work)
1438 {
1439 struct cw1200_common *priv =
1440 container_of(work, struct cw1200_common, unjoin_work);
1441
1442 cw1200_do_unjoin(priv);
1443
1444 /* Tell the stack we're dead */
1445 ieee80211_connection_loss(priv->vif);
1446
1447 wsm_unlock_tx(priv);
1448 }
1449
1450 int cw1200_enable_listening(struct cw1200_common *priv)
1451 {
1452 struct wsm_start start = {
1453 .mode = WSM_START_MODE_P2P_DEV,
1454 .band = WSM_PHY_BAND_2_4G,
1455 .beacon_interval = 100,
1456 .dtim_period = 1,
1457 .probe_delay = 0,
1458 .basic_rate_set = 0x0F,
1459 };
1460
1461 if (priv->channel) {
1462 start.band = priv->channel->band == NL80211_BAND_5GHZ ?
1463 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1464 start.channel_number = priv->channel->hw_value;
1465 } else {
1466 start.band = WSM_PHY_BAND_2_4G;
1467 start.channel_number = 1;
1468 }
1469
1470 return wsm_start(priv, &start);
1471 }
1472
1473 int cw1200_disable_listening(struct cw1200_common *priv)
1474 {
1475 int ret;
1476 struct wsm_reset reset = {
1477 .reset_statistics = true,
1478 };
1479 ret = wsm_reset(priv, &reset);
1480 return ret;
1481 }
1482
1483 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1484 {
1485 if (enabled) {
1486 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1487 if (!cw1200_enable_listening(priv))
1488 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1489 wsm_set_probe_responder(priv, true);
1490 }
1491 } else {
1492 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1493 if (!cw1200_disable_listening(priv))
1494 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1495 wsm_set_probe_responder(priv, false);
1496 }
1497 }
1498 }
1499
1500 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1501 const struct wsm_edca_params *arg)
1502 {
1503 int ret;
1504 u16 uapsd_flags = 0;
1505
1506 /* Here's the mapping AC [queue, bit]
1507 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1508 */
1509
1510 if (arg->uapsd_enable[0])
1511 uapsd_flags |= 1 << 3;
1512
1513 if (arg->uapsd_enable[1])
1514 uapsd_flags |= 1 << 2;
1515
1516 if (arg->uapsd_enable[2])
1517 uapsd_flags |= 1 << 1;
1518
1519 if (arg->uapsd_enable[3])
1520 uapsd_flags |= 1;
1521
1522 /* Currently pseudo U-APSD operation is not supported, so setting
1523 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1524 * AutoTriggerStep to 0
1525 */
1526
1527 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1528 priv->uapsd_info.min_auto_trigger_interval = 0;
1529 priv->uapsd_info.max_auto_trigger_interval = 0;
1530 priv->uapsd_info.auto_trigger_step = 0;
1531
1532 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1533 return ret;
1534 }
1535
1536 /* ******************************************************************** */
1537 /* AP API */
1538
1539 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1540 struct ieee80211_sta *sta)
1541 {
1542 struct cw1200_common *priv = hw->priv;
1543 struct cw1200_sta_priv *sta_priv =
1544 (struct cw1200_sta_priv *)&sta->drv_priv;
1545 struct cw1200_link_entry *entry;
1546 struct sk_buff *skb;
1547
1548 if (priv->mode != NL80211_IFTYPE_AP)
1549 return 0;
1550
1551 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1552 if (WARN_ON(!sta_priv->link_id)) {
1553 wiphy_info(priv->hw->wiphy,
1554 "[AP] No more link IDs available.\n");
1555 return -ENOENT;
1556 }
1557
1558 entry = &priv->link_id_db[sta_priv->link_id - 1];
1559 spin_lock_bh(&priv->ps_state_lock);
1560 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1561 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1562 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1563 entry->status = CW1200_LINK_HARD;
1564 while ((skb = skb_dequeue(&entry->rx_queue)))
1565 ieee80211_rx_irqsafe(priv->hw, skb);
1566 spin_unlock_bh(&priv->ps_state_lock);
1567 return 0;
1568 }
1569
1570 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1571 struct ieee80211_sta *sta)
1572 {
1573 struct cw1200_common *priv = hw->priv;
1574 struct cw1200_sta_priv *sta_priv =
1575 (struct cw1200_sta_priv *)&sta->drv_priv;
1576 struct cw1200_link_entry *entry;
1577
1578 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1579 return 0;
1580
1581 entry = &priv->link_id_db[sta_priv->link_id - 1];
1582 spin_lock_bh(&priv->ps_state_lock);
1583 entry->status = CW1200_LINK_RESERVE;
1584 entry->timestamp = jiffies;
1585 wsm_lock_tx_async(priv);
1586 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1587 wsm_unlock_tx(priv);
1588 spin_unlock_bh(&priv->ps_state_lock);
1589 flush_workqueue(priv->workqueue);
1590 return 0;
1591 }
1592
1593 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1594 struct ieee80211_vif *vif,
1595 enum sta_notify_cmd notify_cmd,
1596 int link_id)
1597 {
1598 struct cw1200_common *priv = dev->priv;
1599 u32 bit, prev;
1600
1601 /* Zero link id means "for all link IDs" */
1602 if (link_id)
1603 bit = BIT(link_id);
1604 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1605 bit = 0;
1606 else
1607 bit = priv->link_id_map;
1608 prev = priv->sta_asleep_mask & bit;
1609
1610 switch (notify_cmd) {
1611 case STA_NOTIFY_SLEEP:
1612 if (!prev) {
1613 if (priv->buffered_multicasts &&
1614 !priv->sta_asleep_mask)
1615 queue_work(priv->workqueue,
1616 &priv->multicast_start_work);
1617 priv->sta_asleep_mask |= bit;
1618 }
1619 break;
1620 case STA_NOTIFY_AWAKE:
1621 if (prev) {
1622 priv->sta_asleep_mask &= ~bit;
1623 priv->pspoll_mask &= ~bit;
1624 if (priv->tx_multicast && link_id &&
1625 !priv->sta_asleep_mask)
1626 queue_work(priv->workqueue,
1627 &priv->multicast_stop_work);
1628 cw1200_bh_wakeup(priv);
1629 }
1630 break;
1631 }
1632 }
1633
1634 void cw1200_sta_notify(struct ieee80211_hw *dev,
1635 struct ieee80211_vif *vif,
1636 enum sta_notify_cmd notify_cmd,
1637 struct ieee80211_sta *sta)
1638 {
1639 struct cw1200_common *priv = dev->priv;
1640 struct cw1200_sta_priv *sta_priv =
1641 (struct cw1200_sta_priv *)&sta->drv_priv;
1642
1643 spin_lock_bh(&priv->ps_state_lock);
1644 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1645 spin_unlock_bh(&priv->ps_state_lock);
1646 }
1647
1648 static void cw1200_ps_notify(struct cw1200_common *priv,
1649 int link_id, bool ps)
1650 {
1651 if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1652 return;
1653
1654 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1655 ps ? "Stop" : "Start",
1656 link_id, priv->sta_asleep_mask);
1657
1658 __cw1200_sta_notify(priv->hw, priv->vif,
1659 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1660 }
1661
1662 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1663 {
1664 struct sk_buff *skb;
1665 struct wsm_update_ie update_ie = {
1666 .what = WSM_UPDATE_IE_BEACON,
1667 .count = 1,
1668 };
1669 u16 tim_offset, tim_length;
1670
1671 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1672
1673 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1674 &tim_offset, &tim_length);
1675 if (!skb) {
1676 if (!__cw1200_flush(priv, true))
1677 wsm_unlock_tx(priv);
1678 return -ENOENT;
1679 }
1680
1681 if (tim_offset && tim_length >= 6) {
1682 /* Ignore DTIM count from mac80211:
1683 * firmware handles DTIM internally.
1684 */
1685 skb->data[tim_offset + 2] = 0;
1686
1687 /* Set/reset aid0 bit */
1688 if (aid0_bit_set)
1689 skb->data[tim_offset + 4] |= 1;
1690 else
1691 skb->data[tim_offset + 4] &= ~1;
1692 }
1693
1694 update_ie.ies = &skb->data[tim_offset];
1695 update_ie.length = tim_length;
1696 wsm_update_ie(priv, &update_ie);
1697
1698 dev_kfree_skb(skb);
1699
1700 return 0;
1701 }
1702
1703 void cw1200_set_tim_work(struct work_struct *work)
1704 {
1705 struct cw1200_common *priv =
1706 container_of(work, struct cw1200_common, set_tim_work);
1707 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1708 }
1709
1710 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1711 bool set)
1712 {
1713 struct cw1200_common *priv = dev->priv;
1714 queue_work(priv->workqueue, &priv->set_tim_work);
1715 return 0;
1716 }
1717
1718 void cw1200_set_cts_work(struct work_struct *work)
1719 {
1720 struct cw1200_common *priv =
1721 container_of(work, struct cw1200_common, set_cts_work);
1722
1723 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1724 struct wsm_update_ie update_ie = {
1725 .what = WSM_UPDATE_IE_BEACON,
1726 .count = 1,
1727 .ies = erp_ie,
1728 .length = 3,
1729 };
1730 u32 erp_info;
1731 __le32 use_cts_prot;
1732 mutex_lock(&priv->conf_mutex);
1733 erp_info = priv->erp_info;
1734 mutex_unlock(&priv->conf_mutex);
1735 use_cts_prot =
1736 erp_info & WLAN_ERP_USE_PROTECTION ?
1737 __cpu_to_le32(1) : 0;
1738
1739 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1740
1741 pr_debug("[STA] ERP information 0x%x\n", erp_info);
1742
1743 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1744 &use_cts_prot, sizeof(use_cts_prot));
1745 wsm_update_ie(priv, &update_ie);
1746
1747 return;
1748 }
1749
1750 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1751 {
1752 struct wsm_override_internal_txrate arg;
1753 int ret = 0;
1754
1755 if (priv->mode == NL80211_IFTYPE_STATION) {
1756 /* Plumb PSPOLL and NULL template */
1757 cw1200_upload_pspoll(priv);
1758 cw1200_upload_null(priv);
1759 cw1200_upload_qosnull(priv);
1760 } else {
1761 return 0;
1762 }
1763
1764 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1765
1766 if (!priv->vif->p2p) {
1767 /* STATION mode */
1768 if (priv->bss_params.operational_rate_set & ~0xF) {
1769 pr_debug("[STA] STA has ERP rates\n");
1770 /* G or BG mode */
1771 arg.internalTxRate = (__ffs(
1772 priv->bss_params.operational_rate_set & ~0xF));
1773 } else {
1774 pr_debug("[STA] STA has non ERP rates\n");
1775 /* B only mode */
1776 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1777 }
1778 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1779 } else {
1780 /* P2P mode */
1781 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1782 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1783 }
1784
1785 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1786 priv->mode,
1787 arg.internalTxRate,
1788 arg.nonErpInternalTxRate);
1789
1790 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1791 &arg, sizeof(arg));
1792
1793 return ret;
1794 }
1795
1796 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1797 struct ieee80211_vif *vif,
1798 struct ieee80211_bss_conf *info,
1799 u32 changed)
1800 {
1801 struct cw1200_common *priv = dev->priv;
1802 bool do_join = false;
1803
1804 mutex_lock(&priv->conf_mutex);
1805
1806 pr_debug("BSS CHANGED: %08x\n", changed);
1807
1808 /* TODO: BSS_CHANGED_QOS */
1809 /* TODO: BSS_CHANGED_TXPOWER */
1810
1811 if (changed & BSS_CHANGED_ARP_FILTER) {
1812 struct wsm_mib_arp_ipv4_filter filter = {0};
1813 int i;
1814
1815 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1816 info->arp_addr_cnt);
1817
1818 /* Currently only one IP address is supported by firmware.
1819 * In case of more IPs arp filtering will be disabled.
1820 */
1821 if (info->arp_addr_cnt > 0 &&
1822 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1823 for (i = 0; i < info->arp_addr_cnt; i++) {
1824 filter.ipv4addrs[i] = info->arp_addr_list[i];
1825 pr_debug("[STA] addr[%d]: 0x%X\n",
1826 i, filter.ipv4addrs[i]);
1827 }
1828 filter.enable = __cpu_to_le32(1);
1829 }
1830
1831 pr_debug("[STA] arp ip filter enable: %d\n",
1832 __le32_to_cpu(filter.enable));
1833
1834 wsm_set_arp_ipv4_filter(priv, &filter);
1835 }
1836
1837 if (changed &
1838 (BSS_CHANGED_BEACON |
1839 BSS_CHANGED_AP_PROBE_RESP |
1840 BSS_CHANGED_BSSID |
1841 BSS_CHANGED_SSID |
1842 BSS_CHANGED_IBSS)) {
1843 pr_debug("BSS_CHANGED_BEACON\n");
1844 priv->beacon_int = info->beacon_int;
1845 cw1200_update_beaconing(priv);
1846 cw1200_upload_beacon(priv);
1847 }
1848
1849 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1850 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1851
1852 if (priv->enable_beacon != info->enable_beacon) {
1853 cw1200_enable_beaconing(priv, info->enable_beacon);
1854 priv->enable_beacon = info->enable_beacon;
1855 }
1856 }
1857
1858 if (changed & BSS_CHANGED_BEACON_INT) {
1859 pr_debug("CHANGED_BEACON_INT\n");
1860 if (info->ibss_joined)
1861 do_join = true;
1862 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1863 cw1200_update_beaconing(priv);
1864 }
1865
1866 /* assoc/disassoc, or maybe AID changed */
1867 if (changed & BSS_CHANGED_ASSOC) {
1868 wsm_lock_tx(priv);
1869 priv->wep_default_key_id = -1;
1870 wsm_unlock_tx(priv);
1871 }
1872
1873 if (changed & BSS_CHANGED_BSSID) {
1874 pr_debug("BSS_CHANGED_BSSID\n");
1875 do_join = true;
1876 }
1877
1878 if (changed &
1879 (BSS_CHANGED_ASSOC |
1880 BSS_CHANGED_BSSID |
1881 BSS_CHANGED_IBSS |
1882 BSS_CHANGED_BASIC_RATES |
1883 BSS_CHANGED_HT)) {
1884 pr_debug("BSS_CHANGED_ASSOC\n");
1885 if (info->assoc) {
1886 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1887 ieee80211_connection_loss(vif);
1888 mutex_unlock(&priv->conf_mutex);
1889 return;
1890 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1891 priv->join_status = CW1200_JOIN_STATUS_STA;
1892 }
1893 } else {
1894 do_join = true;
1895 }
1896
1897 if (info->assoc || info->ibss_joined) {
1898 struct ieee80211_sta *sta = NULL;
1899 __le32 htprot = 0;
1900
1901 if (info->dtim_period)
1902 priv->join_dtim_period = info->dtim_period;
1903 priv->beacon_int = info->beacon_int;
1904
1905 rcu_read_lock();
1906
1907 if (info->bssid && !info->ibss_joined)
1908 sta = ieee80211_find_sta(vif, info->bssid);
1909 if (sta) {
1910 priv->ht_info.ht_cap = sta->ht_cap;
1911 priv->bss_params.operational_rate_set =
1912 cw1200_rate_mask_to_wsm(priv,
1913 sta->supp_rates[priv->channel->band]);
1914 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1915 priv->ht_info.operation_mode = info->ht_operation_mode;
1916 } else {
1917 memset(&priv->ht_info, 0,
1918 sizeof(priv->ht_info));
1919 priv->bss_params.operational_rate_set = -1;
1920 }
1921 rcu_read_unlock();
1922
1923 /* Non Greenfield stations present */
1924 if (priv->ht_info.operation_mode &
1925 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1926 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1927
1928 /* Set HT protection method */
1929 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1930
1931 /* TODO:
1932 * STBC_param.dual_cts
1933 * STBC_param.LSIG_TXOP_FILL
1934 */
1935
1936 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1937 &htprot, sizeof(htprot));
1938
1939 priv->association_mode.greenfield =
1940 cw1200_ht_greenfield(&priv->ht_info);
1941 priv->association_mode.flags =
1942 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1943 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1944 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1945 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1946 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1947 priv->association_mode.preamble =
1948 info->use_short_preamble ?
1949 WSM_JOIN_PREAMBLE_SHORT :
1950 WSM_JOIN_PREAMBLE_LONG;
1951 priv->association_mode.basic_rate_set = __cpu_to_le32(
1952 cw1200_rate_mask_to_wsm(priv,
1953 info->basic_rates));
1954 priv->association_mode.mpdu_start_spacing =
1955 cw1200_ht_ampdu_density(&priv->ht_info);
1956
1957 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1958 cancel_work_sync(&priv->unjoin_work);
1959
1960 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1961 priv->bss_params.aid = info->aid;
1962
1963 if (priv->join_dtim_period < 1)
1964 priv->join_dtim_period = 1;
1965
1966 pr_debug("[STA] DTIM %d, interval: %d\n",
1967 priv->join_dtim_period, priv->beacon_int);
1968 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1969 priv->association_mode.preamble,
1970 priv->association_mode.greenfield,
1971 priv->bss_params.aid,
1972 priv->bss_params.operational_rate_set,
1973 priv->association_mode.basic_rate_set);
1974 wsm_set_association_mode(priv, &priv->association_mode);
1975
1976 if (!info->ibss_joined) {
1977 wsm_keep_alive_period(priv, 30 /* sec */);
1978 wsm_set_bss_params(priv, &priv->bss_params);
1979 priv->setbssparams_done = true;
1980 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1981 cw1200_set_pm(priv, &priv->powersave_mode);
1982 }
1983 if (priv->vif->p2p) {
1984 pr_debug("[STA] Setting p2p powersave configuration.\n");
1985 wsm_set_p2p_ps_modeinfo(priv,
1986 &priv->p2p_ps_modeinfo);
1987 }
1988 if (priv->bt_present)
1989 cw1200_set_btcoexinfo(priv);
1990 } else {
1991 memset(&priv->association_mode, 0,
1992 sizeof(priv->association_mode));
1993 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1994 }
1995 }
1996
1997 /* ERP Protection */
1998 if (changed & (BSS_CHANGED_ASSOC |
1999 BSS_CHANGED_ERP_CTS_PROT |
2000 BSS_CHANGED_ERP_PREAMBLE)) {
2001 u32 prev_erp_info = priv->erp_info;
2002 if (info->use_cts_prot)
2003 priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2004 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2005 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2006
2007 if (info->use_short_preamble)
2008 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2009 else
2010 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2011
2012 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2013
2014 if (prev_erp_info != priv->erp_info)
2015 queue_work(priv->workqueue, &priv->set_cts_work);
2016 }
2017
2018 /* ERP Slottime */
2019 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2020 __le32 slot_time = info->use_short_slot ?
2021 __cpu_to_le32(9) : __cpu_to_le32(20);
2022 pr_debug("[STA] Slot time: %d us.\n",
2023 __le32_to_cpu(slot_time));
2024 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2025 &slot_time, sizeof(slot_time));
2026 }
2027
2028 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2029 struct wsm_rcpi_rssi_threshold threshold = {
2030 .rollingAverageCount = 8,
2031 };
2032 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2033 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2034 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2035 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2036
2037 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2038 /* RSSI subscription enabled */
2039 /* TODO: It's not a correct way of setting threshold.
2040 * Upper and lower must be set equal here and adjusted
2041 * in callback. However current implementation is much
2042 * more relaible and stable.
2043 */
2044
2045 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2046 * RSSI = RCPI / 2 - 110
2047 */
2048 if (priv->cqm_use_rssi) {
2049 threshold.upperThreshold =
2050 info->cqm_rssi_thold + info->cqm_rssi_hyst;
2051 threshold.lowerThreshold =
2052 info->cqm_rssi_thold;
2053 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2054 } else {
2055 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2056 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2057 }
2058 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2059 } else {
2060 /* There is a bug in FW, see sta.c. We have to enable
2061 * dummy subscription to get correct RSSI values.
2062 */
2063 threshold.rssiRcpiMode |=
2064 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2065 WSM_RCPI_RSSI_DONT_USE_UPPER |
2066 WSM_RCPI_RSSI_DONT_USE_LOWER;
2067 if (priv->cqm_use_rssi)
2068 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2069 }
2070 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2071 }
2072 mutex_unlock(&priv->conf_mutex);
2073
2074 if (do_join) {
2075 wsm_lock_tx(priv);
2076 cw1200_do_join(priv); /* Will unlock it for us */
2077 }
2078 }
2079
2080 void cw1200_multicast_start_work(struct work_struct *work)
2081 {
2082 struct cw1200_common *priv =
2083 container_of(work, struct cw1200_common, multicast_start_work);
2084 long tmo = priv->join_dtim_period *
2085 (priv->beacon_int + 20) * HZ / 1024;
2086
2087 cancel_work_sync(&priv->multicast_stop_work);
2088
2089 if (!priv->aid0_bit_set) {
2090 wsm_lock_tx(priv);
2091 cw1200_set_tim_impl(priv, true);
2092 priv->aid0_bit_set = true;
2093 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2094 wsm_unlock_tx(priv);
2095 }
2096 }
2097
2098 void cw1200_multicast_stop_work(struct work_struct *work)
2099 {
2100 struct cw1200_common *priv =
2101 container_of(work, struct cw1200_common, multicast_stop_work);
2102
2103 if (priv->aid0_bit_set) {
2104 del_timer_sync(&priv->mcast_timeout);
2105 wsm_lock_tx(priv);
2106 priv->aid0_bit_set = false;
2107 cw1200_set_tim_impl(priv, false);
2108 wsm_unlock_tx(priv);
2109 }
2110 }
2111
2112 void cw1200_mcast_timeout(struct timer_list *t)
2113 {
2114 struct cw1200_common *priv = from_timer(priv, t, mcast_timeout);
2115
2116 wiphy_warn(priv->hw->wiphy,
2117 "Multicast delivery timeout.\n");
2118 spin_lock_bh(&priv->ps_state_lock);
2119 priv->tx_multicast = priv->aid0_bit_set &&
2120 priv->buffered_multicasts;
2121 if (priv->tx_multicast)
2122 cw1200_bh_wakeup(priv);
2123 spin_unlock_bh(&priv->ps_state_lock);
2124 }
2125
2126 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2127 struct ieee80211_vif *vif,
2128 struct ieee80211_ampdu_params *params)
2129 {
2130 /* Aggregation is implemented fully in firmware,
2131 * including block ack negotiation. Do not allow
2132 * mac80211 stack to do anything: it interferes with
2133 * the firmware.
2134 */
2135
2136 /* Note that we still need this function stubbed. */
2137 return -ENOTSUPP;
2138 }
2139
2140 /* ******************************************************************** */
2141 /* WSM callback */
2142 void cw1200_suspend_resume(struct cw1200_common *priv,
2143 struct wsm_suspend_resume *arg)
2144 {
2145 pr_debug("[AP] %s: %s\n",
2146 arg->stop ? "stop" : "start",
2147 arg->multicast ? "broadcast" : "unicast");
2148
2149 if (arg->multicast) {
2150 bool cancel_tmo = false;
2151 spin_lock_bh(&priv->ps_state_lock);
2152 if (arg->stop) {
2153 priv->tx_multicast = false;
2154 } else {
2155 /* Firmware sends this indication every DTIM if there
2156 * is a STA in powersave connected. There is no reason
2157 * to suspend, following wakeup will consume much more
2158 * power than it could be saved.
2159 */
2160 cw1200_pm_stay_awake(&priv->pm_state,
2161 priv->join_dtim_period *
2162 (priv->beacon_int + 20) * HZ / 1024);
2163 priv->tx_multicast = (priv->aid0_bit_set &&
2164 priv->buffered_multicasts);
2165 if (priv->tx_multicast) {
2166 cancel_tmo = true;
2167 cw1200_bh_wakeup(priv);
2168 }
2169 }
2170 spin_unlock_bh(&priv->ps_state_lock);
2171 if (cancel_tmo)
2172 del_timer_sync(&priv->mcast_timeout);
2173 } else {
2174 spin_lock_bh(&priv->ps_state_lock);
2175 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2176 spin_unlock_bh(&priv->ps_state_lock);
2177 if (!arg->stop)
2178 cw1200_bh_wakeup(priv);
2179 }
2180 return;
2181 }
2182
2183 /* ******************************************************************** */
2184 /* AP privates */
2185
2186 static int cw1200_upload_beacon(struct cw1200_common *priv)
2187 {
2188 int ret = 0;
2189 struct ieee80211_mgmt *mgmt;
2190 struct wsm_template_frame frame = {
2191 .frame_type = WSM_FRAME_TYPE_BEACON,
2192 };
2193
2194 u16 tim_offset;
2195 u16 tim_len;
2196
2197 if (priv->mode == NL80211_IFTYPE_STATION ||
2198 priv->mode == NL80211_IFTYPE_MONITOR ||
2199 priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2200 goto done;
2201
2202 if (priv->vif->p2p)
2203 frame.rate = WSM_TRANSMIT_RATE_6;
2204
2205 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2206 &tim_offset, &tim_len);
2207 if (!frame.skb)
2208 return -ENOMEM;
2209
2210 ret = wsm_set_template_frame(priv, &frame);
2211
2212 if (ret)
2213 goto done;
2214
2215 /* TODO: Distill probe resp; remove TIM
2216 * and any other beacon-specific IEs
2217 */
2218 mgmt = (void *)frame.skb->data;
2219 mgmt->frame_control =
2220 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2221 IEEE80211_STYPE_PROBE_RESP);
2222
2223 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2224 if (priv->vif->p2p) {
2225 ret = wsm_set_probe_responder(priv, true);
2226 } else {
2227 ret = wsm_set_template_frame(priv, &frame);
2228 wsm_set_probe_responder(priv, false);
2229 }
2230
2231 done:
2232 dev_kfree_skb(frame.skb);
2233
2234 return ret;
2235 }
2236
2237 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2238 {
2239 int ret = 0;
2240 struct wsm_template_frame frame = {
2241 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2242 .rate = 0xFF,
2243 };
2244
2245
2246 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2247 if (!frame.skb)
2248 return -ENOMEM;
2249
2250 ret = wsm_set_template_frame(priv, &frame);
2251
2252 dev_kfree_skb(frame.skb);
2253
2254 return ret;
2255 }
2256
2257 static int cw1200_upload_null(struct cw1200_common *priv)
2258 {
2259 int ret = 0;
2260 struct wsm_template_frame frame = {
2261 .frame_type = WSM_FRAME_TYPE_NULL,
2262 .rate = 0xFF,
2263 };
2264
2265 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif, false);
2266 if (!frame.skb)
2267 return -ENOMEM;
2268
2269 ret = wsm_set_template_frame(priv, &frame);
2270
2271 dev_kfree_skb(frame.skb);
2272
2273 return ret;
2274 }
2275
2276 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2277 {
2278 /* TODO: This needs to be implemented
2279
2280 struct wsm_template_frame frame = {
2281 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2282 .rate = 0xFF,
2283 };
2284
2285 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2286 if (!frame.skb)
2287 return -ENOMEM;
2288
2289 ret = wsm_set_template_frame(priv, &frame);
2290
2291 dev_kfree_skb(frame.skb);
2292
2293 */
2294 return 0;
2295 }
2296
2297 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2298 bool enable)
2299 {
2300 struct wsm_beacon_transmit transmit = {
2301 .enable_beaconing = enable,
2302 };
2303
2304 return wsm_beacon_transmit(priv, &transmit);
2305 }
2306
2307 static int cw1200_start_ap(struct cw1200_common *priv)
2308 {
2309 int ret;
2310 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2311 struct wsm_start start = {
2312 .mode = priv->vif->p2p ?
2313 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2314 .band = (priv->channel->band == NL80211_BAND_5GHZ) ?
2315 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2316 .channel_number = priv->channel->hw_value,
2317 .beacon_interval = conf->beacon_int,
2318 .dtim_period = conf->dtim_period,
2319 .preamble = conf->use_short_preamble ?
2320 WSM_JOIN_PREAMBLE_SHORT :
2321 WSM_JOIN_PREAMBLE_LONG,
2322 .probe_delay = 100,
2323 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2324 conf->basic_rates),
2325 };
2326 struct wsm_operational_mode mode = {
2327 .power_mode = cw1200_power_mode,
2328 .disable_more_flag_usage = true,
2329 };
2330
2331 memset(start.ssid, 0, sizeof(start.ssid));
2332 if (!conf->hidden_ssid) {
2333 start.ssid_len = conf->ssid_len;
2334 memcpy(start.ssid, conf->ssid, start.ssid_len);
2335 }
2336
2337 priv->beacon_int = conf->beacon_int;
2338 priv->join_dtim_period = conf->dtim_period;
2339
2340 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2341
2342 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2343 start.channel_number, start.band,
2344 start.beacon_interval, start.dtim_period,
2345 start.basic_rate_set,
2346 start.ssid_len, start.ssid);
2347 ret = wsm_start(priv, &start);
2348 if (!ret)
2349 ret = cw1200_upload_keys(priv);
2350 if (!ret && priv->vif->p2p) {
2351 pr_debug("[AP] Setting p2p powersave configuration.\n");
2352 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2353 }
2354 if (!ret) {
2355 wsm_set_block_ack_policy(priv, 0, 0);
2356 priv->join_status = CW1200_JOIN_STATUS_AP;
2357 cw1200_update_filtering(priv);
2358 }
2359 wsm_set_operational_mode(priv, &mode);
2360 return ret;
2361 }
2362
2363 static int cw1200_update_beaconing(struct cw1200_common *priv)
2364 {
2365 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2366 struct wsm_reset reset = {
2367 .link_id = 0,
2368 .reset_statistics = true,
2369 };
2370
2371 if (priv->mode == NL80211_IFTYPE_AP) {
2372 /* TODO: check if changed channel, band */
2373 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2374 priv->beacon_int != conf->beacon_int) {
2375 pr_debug("ap restarting\n");
2376 wsm_lock_tx(priv);
2377 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2378 wsm_reset(priv, &reset);
2379 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2380 cw1200_start_ap(priv);
2381 wsm_unlock_tx(priv);
2382 } else
2383 pr_debug("ap started join_status: %d\n",
2384 priv->join_status);
2385 }
2386 return 0;
2387 }
Linux with added FPC-III support