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cw1200: add driver for the ST-E CW1100 & CW1200 WLAN chipsets
[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / cw1200 / sta.c
1 /*
2 * Mac80211 STA API for ST-Ericsson CW1200 drivers
3 *
4 * Copyright (c) 2010, ST-Ericsson
5 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/vmalloc.h>
13 #include <linux/sched.h>
14 #include <linux/firmware.h>
15 #include <linux/module.h>
16
17 #include "cw1200.h"
18 #include "sta.h"
19 #include "fwio.h"
20 #include "bh.h"
21 #include "debug.h"
22
23 #ifndef ERP_INFO_BYTE_OFFSET
24 #define ERP_INFO_BYTE_OFFSET 2
25 #endif
26
27 static void cw1200_do_join(struct cw1200_common *priv);
28 static void cw1200_do_unjoin(struct cw1200_common *priv);
29
30 static int cw1200_upload_beacon(struct cw1200_common *priv);
31 static int cw1200_upload_pspoll(struct cw1200_common *priv);
32 static int cw1200_upload_null(struct cw1200_common *priv);
33 static int cw1200_upload_qosnull(struct cw1200_common *priv);
34 static int cw1200_start_ap(struct cw1200_common *priv);
35 static int cw1200_update_beaconing(struct cw1200_common *priv);
36 static int cw1200_enable_beaconing(struct cw1200_common *priv,
37 bool enable);
38 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
39 struct ieee80211_vif *vif,
40 enum sta_notify_cmd notify_cmd,
41 int link_id);
42 static int __cw1200_flush(struct cw1200_common *priv, bool drop);
43
44 static inline void __cw1200_free_event_queue(struct list_head *list)
45 {
46 struct cw1200_wsm_event *event, *tmp;
47 list_for_each_entry_safe(event, tmp, list, link) {
48 list_del(&event->link);
49 kfree(event);
50 }
51 }
52
53 /* ******************************************************************** */
54 /* STA API */
55
56 int cw1200_start(struct ieee80211_hw *dev)
57 {
58 struct cw1200_common *priv = dev->priv;
59 int ret = 0;
60
61 cw1200_pm_stay_awake(&priv->pm_state, HZ);
62
63 mutex_lock(&priv->conf_mutex);
64
65 /* default EDCA */
66 WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
67 WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
68 WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
69 WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
70 ret = wsm_set_edca_params(priv, &priv->edca);
71 if (ret)
72 goto out;
73
74 ret = cw1200_set_uapsd_param(priv, &priv->edca);
75 if (ret)
76 goto out;
77
78 priv->setbssparams_done = false;
79
80 memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
81 priv->mode = NL80211_IFTYPE_MONITOR;
82 priv->wep_default_key_id = -1;
83
84 priv->cqm_beacon_loss_count = 10;
85
86 ret = cw1200_setup_mac(priv);
87 if (ret)
88 goto out;
89
90 out:
91 mutex_unlock(&priv->conf_mutex);
92 return ret;
93 }
94
95 void cw1200_stop(struct ieee80211_hw *dev)
96 {
97 struct cw1200_common *priv = dev->priv;
98 LIST_HEAD(list);
99 int i;
100
101 wsm_lock_tx(priv);
102
103 while (down_trylock(&priv->scan.lock)) {
104 /* Scan is in progress. Force it to stop. */
105 priv->scan.req = NULL;
106 schedule();
107 }
108 up(&priv->scan.lock);
109
110 cancel_delayed_work_sync(&priv->scan.probe_work);
111 cancel_delayed_work_sync(&priv->scan.timeout);
112 cancel_delayed_work_sync(&priv->clear_recent_scan_work);
113 cancel_delayed_work_sync(&priv->join_timeout);
114 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
115 cancel_work_sync(&priv->unjoin_work);
116 cancel_delayed_work_sync(&priv->link_id_gc_work);
117 flush_workqueue(priv->workqueue);
118 del_timer_sync(&priv->mcast_timeout);
119 mutex_lock(&priv->conf_mutex);
120 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
121 priv->listening = false;
122
123 spin_lock(&priv->event_queue_lock);
124 list_splice_init(&priv->event_queue, &list);
125 spin_unlock(&priv->event_queue_lock);
126 __cw1200_free_event_queue(&list);
127
128
129 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
130 priv->join_pending = false;
131
132 for (i = 0; i < 4; i++)
133 cw1200_queue_clear(&priv->tx_queue[i]);
134 mutex_unlock(&priv->conf_mutex);
135 tx_policy_clean(priv);
136
137 /* HACK! */
138 if (atomic_xchg(&priv->tx_lock, 1) != 1)
139 pr_debug("[STA] TX is force-unlocked due to stop request.\n");
140
141 wsm_unlock_tx(priv);
142 atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
143 }
144
145 static int cw1200_bssloss_mitigation = 1;
146 module_param(cw1200_bssloss_mitigation, int, 0644);
147 MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
148
149
150 void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
151 int init, int good, int bad)
152 {
153 int tx = 0;
154
155 priv->delayed_link_loss = 0;
156 cancel_work_sync(&priv->bss_params_work);
157
158 pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
159 priv->bss_loss_state,
160 init, good, bad,
161 atomic_read(&priv->tx_lock),
162 priv->delayed_unjoin);
163
164 /* If we have a pending unjoin */
165 if (priv->delayed_unjoin)
166 return;
167
168 if (init) {
169 queue_delayed_work(priv->workqueue,
170 &priv->bss_loss_work,
171 HZ);
172 priv->bss_loss_state = 0;
173
174 /* Skip the confimration procedure in P2P case */
175 if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
176 tx = 1;
177 } else if (good) {
178 cancel_delayed_work_sync(&priv->bss_loss_work);
179 priv->bss_loss_state = 0;
180 queue_work(priv->workqueue, &priv->bss_params_work);
181 } else if (bad) {
182 /* XXX Should we just keep going until we time out? */
183 if (priv->bss_loss_state < 3)
184 tx = 1;
185 } else {
186 cancel_delayed_work_sync(&priv->bss_loss_work);
187 priv->bss_loss_state = 0;
188 }
189
190 /* Bypass mitigation if it's disabled */
191 if (!cw1200_bssloss_mitigation)
192 tx = 0;
193
194 /* Spit out a NULL packet to our AP if necessary */
195 if (tx) {
196 struct sk_buff *skb;
197
198 priv->bss_loss_state++;
199
200 skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
201 WARN_ON(!skb);
202 if (skb)
203 cw1200_tx(priv->hw, NULL, skb);
204 }
205 }
206
207 int cw1200_add_interface(struct ieee80211_hw *dev,
208 struct ieee80211_vif *vif)
209 {
210 int ret;
211 struct cw1200_common *priv = dev->priv;
212 /* __le32 auto_calibration_mode = __cpu_to_le32(1); */
213
214 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
215 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
216
217 mutex_lock(&priv->conf_mutex);
218
219 if (priv->mode != NL80211_IFTYPE_MONITOR) {
220 mutex_unlock(&priv->conf_mutex);
221 return -EOPNOTSUPP;
222 }
223
224 switch (vif->type) {
225 case NL80211_IFTYPE_STATION:
226 case NL80211_IFTYPE_ADHOC:
227 case NL80211_IFTYPE_MESH_POINT:
228 case NL80211_IFTYPE_AP:
229 priv->mode = vif->type;
230 break;
231 default:
232 mutex_unlock(&priv->conf_mutex);
233 return -EOPNOTSUPP;
234 }
235
236 priv->vif = vif;
237 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
238 ret = cw1200_setup_mac(priv);
239 /* Enable auto-calibration */
240 /* Exception in subsequent channel switch; disabled.
241 * wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
242 * &auto_calibration_mode, sizeof(auto_calibration_mode));
243 */
244
245 mutex_unlock(&priv->conf_mutex);
246 return ret;
247 }
248
249 void cw1200_remove_interface(struct ieee80211_hw *dev,
250 struct ieee80211_vif *vif)
251 {
252 struct cw1200_common *priv = dev->priv;
253 struct wsm_reset reset = {
254 .reset_statistics = true,
255 };
256 int i;
257
258 mutex_lock(&priv->conf_mutex);
259 switch (priv->join_status) {
260 case CW1200_JOIN_STATUS_JOINING:
261 case CW1200_JOIN_STATUS_PRE_STA:
262 case CW1200_JOIN_STATUS_STA:
263 case CW1200_JOIN_STATUS_IBSS:
264 wsm_lock_tx(priv);
265 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
266 wsm_unlock_tx(priv);
267 break;
268 case CW1200_JOIN_STATUS_AP:
269 for (i = 0; priv->link_id_map; ++i) {
270 if (priv->link_id_map & BIT(i)) {
271 reset.link_id = i;
272 wsm_reset(priv, &reset);
273 priv->link_id_map &= ~BIT(i);
274 }
275 }
276 memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
277 priv->sta_asleep_mask = 0;
278 priv->enable_beacon = false;
279 priv->tx_multicast = false;
280 priv->aid0_bit_set = false;
281 priv->buffered_multicasts = false;
282 priv->pspoll_mask = 0;
283 reset.link_id = 0;
284 wsm_reset(priv, &reset);
285 break;
286 case CW1200_JOIN_STATUS_MONITOR:
287 cw1200_update_listening(priv, false);
288 break;
289 default:
290 break;
291 }
292 priv->vif = NULL;
293 priv->mode = NL80211_IFTYPE_MONITOR;
294 memset(priv->mac_addr, 0, ETH_ALEN);
295 memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
296 cw1200_free_keys(priv);
297 cw1200_setup_mac(priv);
298 priv->listening = false;
299 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
300 if (!__cw1200_flush(priv, true))
301 wsm_unlock_tx(priv);
302
303 mutex_unlock(&priv->conf_mutex);
304 }
305
306 int cw1200_change_interface(struct ieee80211_hw *dev,
307 struct ieee80211_vif *vif,
308 enum nl80211_iftype new_type,
309 bool p2p)
310 {
311 int ret = 0;
312 pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
313 p2p, vif->type, vif->p2p);
314
315 if (new_type != vif->type || vif->p2p != p2p) {
316 cw1200_remove_interface(dev, vif);
317 vif->type = new_type;
318 vif->p2p = p2p;
319 ret = cw1200_add_interface(dev, vif);
320 }
321
322 return ret;
323 }
324
325 int cw1200_config(struct ieee80211_hw *dev, u32 changed)
326 {
327 int ret = 0;
328 struct cw1200_common *priv = dev->priv;
329 struct ieee80211_conf *conf = &dev->conf;
330
331 pr_debug("CONFIG CHANGED: %08x\n", changed);
332
333 down(&priv->scan.lock);
334 mutex_lock(&priv->conf_mutex);
335 /* TODO: IEEE80211_CONF_CHANGE_QOS */
336 /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
337
338 if (changed & IEEE80211_CONF_CHANGE_POWER) {
339 priv->output_power = conf->power_level;
340 pr_debug("[STA] TX power: %d\n", priv->output_power);
341 wsm_set_output_power(priv, priv->output_power * 10);
342 }
343
344 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
345 (priv->channel != conf->chandef.chan)) {
346 struct ieee80211_channel *ch = conf->chandef.chan;
347 struct wsm_switch_channel channel = {
348 .channel_number = ch->hw_value,
349 };
350 pr_debug("[STA] Freq %d (wsm ch: %d).\n",
351 ch->center_freq, ch->hw_value);
352
353 /* __cw1200_flush() implicitly locks tx, if successful */
354 if (!__cw1200_flush(priv, false)) {
355 if (!wsm_switch_channel(priv, &channel)) {
356 ret = wait_event_timeout(priv->channel_switch_done,
357 !priv->channel_switch_in_progress,
358 3 * HZ);
359 if (ret) {
360 /* Already unlocks if successful */
361 priv->channel = ch;
362 ret = 0;
363 } else {
364 ret = -ETIMEDOUT;
365 }
366 } else {
367 /* Unlock if switch channel fails */
368 wsm_unlock_tx(priv);
369 }
370 }
371 }
372
373 if (changed & IEEE80211_CONF_CHANGE_PS) {
374 if (!(conf->flags & IEEE80211_CONF_PS))
375 priv->powersave_mode.mode = WSM_PSM_ACTIVE;
376 else if (conf->dynamic_ps_timeout <= 0)
377 priv->powersave_mode.mode = WSM_PSM_PS;
378 else
379 priv->powersave_mode.mode = WSM_PSM_FAST_PS;
380
381 /* Firmware requires that value for this 1-byte field must
382 * be specified in units of 500us. Values above the 128ms
383 * threshold are not supported.
384 */
385 if (conf->dynamic_ps_timeout >= 0x80)
386 priv->powersave_mode.fast_psm_idle_period = 0xFF;
387 else
388 priv->powersave_mode.fast_psm_idle_period =
389 conf->dynamic_ps_timeout << 1;
390
391 if (priv->join_status == CW1200_JOIN_STATUS_STA &&
392 priv->bss_params.aid)
393 cw1200_set_pm(priv, &priv->powersave_mode);
394 }
395
396 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
397 /* TBD: It looks like it's transparent
398 * there's a monitor interface present -- use this
399 * to determine for example whether to calculate
400 * timestamps for packets or not, do not use instead
401 * of filter flags!
402 */
403 }
404
405 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
406 struct wsm_operational_mode mode = {
407 .power_mode = cw1200_power_mode,
408 .disable_more_flag_usage = true,
409 };
410
411 wsm_lock_tx(priv);
412 /* Disable p2p-dev mode forced by TX request */
413 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
414 (conf->flags & IEEE80211_CONF_IDLE) &&
415 !priv->listening) {
416 cw1200_disable_listening(priv);
417 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
418 }
419 wsm_set_operational_mode(priv, &mode);
420 wsm_unlock_tx(priv);
421 }
422
423 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
424 pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
425 conf->long_frame_max_tx_count,
426 conf->short_frame_max_tx_count);
427 spin_lock_bh(&priv->tx_policy_cache.lock);
428 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
429 priv->short_frame_max_tx_count =
430 (conf->short_frame_max_tx_count < 0x0F) ?
431 conf->short_frame_max_tx_count : 0x0F;
432 priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
433 spin_unlock_bh(&priv->tx_policy_cache.lock);
434 }
435 mutex_unlock(&priv->conf_mutex);
436 up(&priv->scan.lock);
437 return ret;
438 }
439
440 void cw1200_update_filtering(struct cw1200_common *priv)
441 {
442 int ret;
443 bool bssid_filtering = !priv->rx_filter.bssid;
444 bool is_p2p = priv->vif && priv->vif->p2p;
445 bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
446
447 static struct wsm_beacon_filter_control bf_ctrl;
448 static struct wsm_mib_beacon_filter_table bf_tbl = {
449 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
450 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
451 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
452 WSM_BEACON_FILTER_IE_HAS_APPEARED,
453 .entry[0].oui[0] = 0x50,
454 .entry[0].oui[1] = 0x6F,
455 .entry[0].oui[2] = 0x9A,
456 .entry[1].ie_id = WLAN_EID_HT_OPERATION,
457 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
458 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
459 WSM_BEACON_FILTER_IE_HAS_APPEARED,
460 .entry[2].ie_id = WLAN_EID_ERP_INFO,
461 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
462 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
463 WSM_BEACON_FILTER_IE_HAS_APPEARED,
464 };
465
466 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
467 return;
468 else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
469 bssid_filtering = false;
470
471 if (priv->disable_beacon_filter) {
472 bf_ctrl.enabled = 0;
473 bf_ctrl.bcn_count = 1;
474 bf_tbl.num = __cpu_to_le32(0);
475 } else if (is_p2p || !is_sta) {
476 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
477 WSM_BEACON_FILTER_AUTO_ERP;
478 bf_ctrl.bcn_count = 0;
479 bf_tbl.num = __cpu_to_le32(2);
480 } else {
481 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
482 bf_ctrl.bcn_count = 0;
483 bf_tbl.num = __cpu_to_le32(3);
484 }
485
486 /*
487 * When acting as p2p client being connected to p2p GO, in order to
488 * receive frames from a different p2p device, turn off bssid filter.
489 *
490 * WARNING: FW dependency!
491 * This can only be used with FW WSM371 and its successors.
492 * In that FW version even with bssid filter turned off,
493 * device will block most of the unwanted frames.
494 */
495 if (is_p2p)
496 bssid_filtering = false;
497
498 ret = wsm_set_rx_filter(priv, &priv->rx_filter);
499 if (!ret)
500 ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
501 if (!ret)
502 ret = wsm_beacon_filter_control(priv, &bf_ctrl);
503 if (!ret)
504 ret = wsm_set_bssid_filtering(priv, bssid_filtering);
505 if (!ret)
506 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
507 if (ret)
508 wiphy_err(priv->hw->wiphy,
509 "Update filtering failed: %d.\n", ret);
510 return;
511 }
512
513 void cw1200_update_filtering_work(struct work_struct *work)
514 {
515 struct cw1200_common *priv =
516 container_of(work, struct cw1200_common,
517 update_filtering_work);
518
519 cw1200_update_filtering(priv);
520 }
521
522 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
523 {
524 struct cw1200_common *priv =
525 container_of(work, struct cw1200_common,
526 set_beacon_wakeup_period_work);
527
528 wsm_set_beacon_wakeup_period(priv,
529 priv->beacon_int * priv->join_dtim_period >
530 MAX_BEACON_SKIP_TIME_MS ? 1 :
531 priv->join_dtim_period, 0);
532 }
533
534 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
535 struct netdev_hw_addr_list *mc_list)
536 {
537 static u8 broadcast_ipv6[ETH_ALEN] = {
538 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
539 };
540 static u8 broadcast_ipv4[ETH_ALEN] = {
541 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
542 };
543 struct cw1200_common *priv = hw->priv;
544 struct netdev_hw_addr *ha;
545 int count = 0;
546
547 /* Disable multicast filtering */
548 priv->has_multicast_subscription = false;
549 memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
550
551 if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
552 return 0;
553
554 /* Enable if requested */
555 netdev_hw_addr_list_for_each(ha, mc_list) {
556 pr_debug("[STA] multicast: %pM\n", ha->addr);
557 memcpy(&priv->multicast_filter.macaddrs[count],
558 ha->addr, ETH_ALEN);
559 if (memcmp(ha->addr, broadcast_ipv4, ETH_ALEN) &&
560 memcmp(ha->addr, broadcast_ipv6, ETH_ALEN))
561 priv->has_multicast_subscription = true;
562 count++;
563 }
564
565 if (count) {
566 priv->multicast_filter.enable = __cpu_to_le32(1);
567 priv->multicast_filter.num_addrs = __cpu_to_le32(count);
568 }
569
570 return netdev_hw_addr_list_count(mc_list);
571 }
572
573 void cw1200_configure_filter(struct ieee80211_hw *dev,
574 unsigned int changed_flags,
575 unsigned int *total_flags,
576 u64 multicast)
577 {
578 struct cw1200_common *priv = dev->priv;
579 bool listening = !!(*total_flags &
580 (FIF_PROMISC_IN_BSS |
581 FIF_OTHER_BSS |
582 FIF_BCN_PRBRESP_PROMISC |
583 FIF_PROBE_REQ));
584
585 *total_flags &= FIF_PROMISC_IN_BSS |
586 FIF_OTHER_BSS |
587 FIF_FCSFAIL |
588 FIF_BCN_PRBRESP_PROMISC |
589 FIF_PROBE_REQ;
590
591 down(&priv->scan.lock);
592 mutex_lock(&priv->conf_mutex);
593
594 priv->rx_filter.promiscuous = (*total_flags & FIF_PROMISC_IN_BSS)
595 ? 1 : 0;
596 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
597 FIF_PROBE_REQ)) ? 1 : 0;
598 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
599 priv->disable_beacon_filter = !(*total_flags &
600 (FIF_BCN_PRBRESP_PROMISC |
601 FIF_PROMISC_IN_BSS |
602 FIF_PROBE_REQ));
603 if (priv->listening != listening) {
604 priv->listening = listening;
605 wsm_lock_tx(priv);
606 cw1200_update_listening(priv, listening);
607 wsm_unlock_tx(priv);
608 }
609 cw1200_update_filtering(priv);
610 mutex_unlock(&priv->conf_mutex);
611 up(&priv->scan.lock);
612 }
613
614 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
615 u16 queue, const struct ieee80211_tx_queue_params *params)
616 {
617 struct cw1200_common *priv = dev->priv;
618 int ret = 0;
619 /* To prevent re-applying PM request OID again and again*/
620 bool old_uapsd_flags;
621
622 mutex_lock(&priv->conf_mutex);
623
624 if (queue < dev->queues) {
625 old_uapsd_flags = priv->uapsd_info.uapsd_flags;
626
627 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
628 ret = wsm_set_tx_queue_params(priv,
629 &priv->tx_queue_params.params[queue], queue);
630 if (ret) {
631 ret = -EINVAL;
632 goto out;
633 }
634
635 WSM_EDCA_SET(&priv->edca, queue, params->aifs,
636 params->cw_min, params->cw_max,
637 params->txop, 0xc8,
638 params->uapsd);
639 ret = wsm_set_edca_params(priv, &priv->edca);
640 if (ret) {
641 ret = -EINVAL;
642 goto out;
643 }
644
645 if (priv->mode == NL80211_IFTYPE_STATION) {
646 ret = cw1200_set_uapsd_param(priv, &priv->edca);
647 if (!ret && priv->setbssparams_done &&
648 (priv->join_status == CW1200_JOIN_STATUS_STA) &&
649 (old_uapsd_flags != priv->uapsd_info.uapsd_flags))
650 ret = cw1200_set_pm(priv, &priv->powersave_mode);
651 }
652 } else {
653 ret = -EINVAL;
654 }
655
656 out:
657 mutex_unlock(&priv->conf_mutex);
658 return ret;
659 }
660
661 int cw1200_get_stats(struct ieee80211_hw *dev,
662 struct ieee80211_low_level_stats *stats)
663 {
664 struct cw1200_common *priv = dev->priv;
665
666 memcpy(stats, &priv->stats, sizeof(*stats));
667 return 0;
668 }
669
670 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
671 {
672 struct wsm_set_pm pm = *arg;
673
674 if (priv->uapsd_info.uapsd_flags != 0)
675 pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
676
677 if (memcmp(&pm, &priv->firmware_ps_mode,
678 sizeof(struct wsm_set_pm))) {
679 priv->firmware_ps_mode = pm;
680 return wsm_set_pm(priv, &pm);
681 } else {
682 return 0;
683 }
684 }
685
686 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
687 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
688 struct ieee80211_key_conf *key)
689 {
690 int ret = -EOPNOTSUPP;
691 struct cw1200_common *priv = dev->priv;
692 struct ieee80211_key_seq seq;
693
694 mutex_lock(&priv->conf_mutex);
695
696 if (cmd == SET_KEY) {
697 u8 *peer_addr = NULL;
698 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
699 1 : 0;
700 int idx = cw1200_alloc_key(priv);
701 struct wsm_add_key *wsm_key = &priv->keys[idx];
702
703 if (idx < 0) {
704 ret = -EINVAL;
705 goto finally;
706 }
707
708 if (sta)
709 peer_addr = sta->addr;
710
711 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
712
713 switch (key->cipher) {
714 case WLAN_CIPHER_SUITE_WEP40:
715 case WLAN_CIPHER_SUITE_WEP104:
716 if (key->keylen > 16) {
717 cw1200_free_key(priv, idx);
718 ret = -EINVAL;
719 goto finally;
720 }
721
722 if (pairwise) {
723 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
724 memcpy(wsm_key->wep_pairwise.peer,
725 peer_addr, ETH_ALEN);
726 memcpy(wsm_key->wep_pairwise.keydata,
727 &key->key[0], key->keylen);
728 wsm_key->wep_pairwise.keylen = key->keylen;
729 } else {
730 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
731 memcpy(wsm_key->wep_group.keydata,
732 &key->key[0], key->keylen);
733 wsm_key->wep_group.keylen = key->keylen;
734 wsm_key->wep_group.keyid = key->keyidx;
735 }
736 break;
737 case WLAN_CIPHER_SUITE_TKIP:
738 ieee80211_get_key_rx_seq(key, 0, &seq);
739 if (pairwise) {
740 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
741 memcpy(wsm_key->tkip_pairwise.peer,
742 peer_addr, ETH_ALEN);
743 memcpy(wsm_key->tkip_pairwise.keydata,
744 &key->key[0], 16);
745 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
746 &key->key[16], 8);
747 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
748 &key->key[24], 8);
749 } else {
750 size_t mic_offset =
751 (priv->mode == NL80211_IFTYPE_AP) ?
752 16 : 24;
753 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
754 memcpy(wsm_key->tkip_group.keydata,
755 &key->key[0], 16);
756 memcpy(wsm_key->tkip_group.rx_mic_key,
757 &key->key[mic_offset], 8);
758
759 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
760 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
761 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
762 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
763 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
764 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
765 wsm_key->tkip_group.rx_seqnum[6] = 0;
766 wsm_key->tkip_group.rx_seqnum[7] = 0;
767
768 wsm_key->tkip_group.keyid = key->keyidx;
769 }
770 break;
771 case WLAN_CIPHER_SUITE_CCMP:
772 ieee80211_get_key_rx_seq(key, 0, &seq);
773 if (pairwise) {
774 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
775 memcpy(wsm_key->aes_pairwise.peer,
776 peer_addr, ETH_ALEN);
777 memcpy(wsm_key->aes_pairwise.keydata,
778 &key->key[0], 16);
779 } else {
780 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
781 memcpy(wsm_key->aes_group.keydata,
782 &key->key[0], 16);
783
784 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
785 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
786 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
787 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
788 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
789 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
790 wsm_key->aes_group.rx_seqnum[6] = 0;
791 wsm_key->aes_group.rx_seqnum[7] = 0;
792 wsm_key->aes_group.keyid = key->keyidx;
793 }
794 break;
795 case WLAN_CIPHER_SUITE_SMS4:
796 if (pairwise) {
797 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
798 memcpy(wsm_key->wapi_pairwise.peer,
799 peer_addr, ETH_ALEN);
800 memcpy(wsm_key->wapi_pairwise.keydata,
801 &key->key[0], 16);
802 memcpy(wsm_key->wapi_pairwise.mic_key,
803 &key->key[16], 16);
804 wsm_key->wapi_pairwise.keyid = key->keyidx;
805 } else {
806 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
807 memcpy(wsm_key->wapi_group.keydata,
808 &key->key[0], 16);
809 memcpy(wsm_key->wapi_group.mic_key,
810 &key->key[16], 16);
811 wsm_key->wapi_group.keyid = key->keyidx;
812 }
813 break;
814 default:
815 pr_warn("Unhandled key type %d\n", key->cipher);
816 cw1200_free_key(priv, idx);
817 ret = -EOPNOTSUPP;
818 goto finally;
819 }
820 ret = wsm_add_key(priv, wsm_key);
821 if (!ret)
822 key->hw_key_idx = idx;
823 else
824 cw1200_free_key(priv, idx);
825 } else if (cmd == DISABLE_KEY) {
826 struct wsm_remove_key wsm_key = {
827 .index = key->hw_key_idx,
828 };
829
830 if (wsm_key.index > WSM_KEY_MAX_INDEX) {
831 ret = -EINVAL;
832 goto finally;
833 }
834
835 cw1200_free_key(priv, wsm_key.index);
836 ret = wsm_remove_key(priv, &wsm_key);
837 } else {
838 pr_warn("Unhandled key command %d\n", cmd);
839 }
840
841 finally:
842 mutex_unlock(&priv->conf_mutex);
843 return ret;
844 }
845
846 void cw1200_wep_key_work(struct work_struct *work)
847 {
848 struct cw1200_common *priv =
849 container_of(work, struct cw1200_common, wep_key_work);
850 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
851 struct cw1200_queue *queue = &priv->tx_queue[queue_id];
852 __le32 wep_default_key_id = __cpu_to_le32(
853 priv->wep_default_key_id);
854
855 pr_debug("[STA] Setting default WEP key: %d\n",
856 priv->wep_default_key_id);
857 wsm_flush_tx(priv);
858 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
859 &wep_default_key_id, sizeof(wep_default_key_id));
860 cw1200_queue_requeue(queue, priv->pending_frame_id);
861 wsm_unlock_tx(priv);
862 }
863
864 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
865 {
866 int ret = 0;
867 __le32 val32;
868 struct cw1200_common *priv = hw->priv;
869
870 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
871 return 0;
872
873 if (value != (u32) -1)
874 val32 = __cpu_to_le32(value);
875 else
876 val32 = 0; /* disabled */
877
878 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
879 /* device is down, can _not_ set threshold */
880 ret = -ENODEV;
881 goto out;
882 }
883
884 if (priv->rts_threshold == value)
885 goto out;
886
887 pr_debug("[STA] Setting RTS threshold: %d\n",
888 priv->rts_threshold);
889
890 /* mutex_lock(&priv->conf_mutex); */
891 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
892 &val32, sizeof(val32));
893 if (!ret)
894 priv->rts_threshold = value;
895 /* mutex_unlock(&priv->conf_mutex); */
896
897 out:
898 return ret;
899 }
900
901 /* If successful, LOCKS the TX queue! */
902 static int __cw1200_flush(struct cw1200_common *priv, bool drop)
903 {
904 int i, ret;
905
906 for (;;) {
907 /* TODO: correct flush handling is required when dev_stop.
908 * Temporary workaround: 2s
909 */
910 if (drop) {
911 for (i = 0; i < 4; ++i)
912 cw1200_queue_clear(&priv->tx_queue[i]);
913 } else {
914 ret = wait_event_timeout(
915 priv->tx_queue_stats.wait_link_id_empty,
916 cw1200_queue_stats_is_empty(
917 &priv->tx_queue_stats, -1),
918 2 * HZ);
919 }
920
921 if (!drop && ret <= 0) {
922 ret = -ETIMEDOUT;
923 break;
924 } else {
925 ret = 0;
926 }
927
928 wsm_lock_tx(priv);
929 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
930 /* Highly unlikely: WSM requeued frames. */
931 wsm_unlock_tx(priv);
932 continue;
933 }
934 break;
935 }
936 return ret;
937 }
938
939 void cw1200_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
940 {
941 struct cw1200_common *priv = hw->priv;
942
943 switch (priv->mode) {
944 case NL80211_IFTYPE_MONITOR:
945 drop = true;
946 break;
947 case NL80211_IFTYPE_AP:
948 if (!priv->enable_beacon)
949 drop = true;
950 break;
951 }
952
953 if (!__cw1200_flush(priv, drop))
954 wsm_unlock_tx(priv);
955
956 return;
957 }
958
959 /* ******************************************************************** */
960 /* WSM callbacks */
961
962 void cw1200_free_event_queue(struct cw1200_common *priv)
963 {
964 LIST_HEAD(list);
965
966 spin_lock(&priv->event_queue_lock);
967 list_splice_init(&priv->event_queue, &list);
968 spin_unlock(&priv->event_queue_lock);
969
970 __cw1200_free_event_queue(&list);
971 }
972
973 void cw1200_event_handler(struct work_struct *work)
974 {
975 struct cw1200_common *priv =
976 container_of(work, struct cw1200_common, event_handler);
977 struct cw1200_wsm_event *event;
978 LIST_HEAD(list);
979
980 spin_lock(&priv->event_queue_lock);
981 list_splice_init(&priv->event_queue, &list);
982 spin_unlock(&priv->event_queue_lock);
983
984 list_for_each_entry(event, &list, link) {
985 switch (event->evt.id) {
986 case WSM_EVENT_ERROR:
987 pr_err("Unhandled WSM Error from LMAC\n");
988 break;
989 case WSM_EVENT_BSS_LOST:
990 pr_debug("[CQM] BSS lost.\n");
991 cancel_work_sync(&priv->unjoin_work);
992 if (!down_trylock(&priv->scan.lock)) {
993 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
994 up(&priv->scan.lock);
995 } else {
996 /* Scan is in progress. Delay reporting.
997 * Scan complete will trigger bss_loss_work
998 */
999 priv->delayed_link_loss = 1;
1000 /* Also start a watchdog. */
1001 queue_delayed_work(priv->workqueue,
1002 &priv->bss_loss_work, 5*HZ);
1003 }
1004 break;
1005 case WSM_EVENT_BSS_REGAINED:
1006 pr_debug("[CQM] BSS regained.\n");
1007 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1008 cancel_work_sync(&priv->unjoin_work);
1009 break;
1010 case WSM_EVENT_RADAR_DETECTED:
1011 wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1012 break;
1013 case WSM_EVENT_RCPI_RSSI:
1014 {
1015 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1016 * RSSI = RCPI / 2 - 110
1017 */
1018 int rcpiRssi = (int)(event->evt.data & 0xFF);
1019 int cqm_evt;
1020 if (priv->cqm_use_rssi)
1021 rcpiRssi = (s8)rcpiRssi;
1022 else
1023 rcpiRssi = rcpiRssi / 2 - 110;
1024
1025 cqm_evt = (rcpiRssi <= priv->cqm_rssi_thold) ?
1026 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1027 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1028 pr_debug("[CQM] RSSI event: %d.\n", rcpiRssi);
1029 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
1030 GFP_KERNEL);
1031 break;
1032 }
1033 case WSM_EVENT_BT_INACTIVE:
1034 pr_warn("Unhandled BT INACTIVE from LMAC\n");
1035 break;
1036 case WSM_EVENT_BT_ACTIVE:
1037 pr_warn("Unhandled BT ACTIVE from LMAC\n");
1038 break;
1039 }
1040 }
1041 __cw1200_free_event_queue(&list);
1042 }
1043
1044 void cw1200_bss_loss_work(struct work_struct *work)
1045 {
1046 struct cw1200_common *priv =
1047 container_of(work, struct cw1200_common, bss_loss_work.work);
1048
1049 pr_debug("[CQM] Reporting connection loss.\n");
1050 wsm_lock_tx(priv);
1051 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1052 wsm_unlock_tx(priv);
1053 }
1054
1055 void cw1200_bss_params_work(struct work_struct *work)
1056 {
1057 struct cw1200_common *priv =
1058 container_of(work, struct cw1200_common, bss_params_work);
1059 mutex_lock(&priv->conf_mutex);
1060
1061 priv->bss_params.reset_beacon_loss = 1;
1062 wsm_set_bss_params(priv, &priv->bss_params);
1063 priv->bss_params.reset_beacon_loss = 0;
1064
1065 mutex_unlock(&priv->conf_mutex);
1066 }
1067
1068 /* ******************************************************************** */
1069 /* Internal API */
1070
1071 /*
1072 * This function is called to Parse the SDD file
1073 * to extract listen_interval and PTA related information
1074 * sdd is a TLV: u8 id, u8 len, u8 data[]
1075 */
1076 static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1077 {
1078 const u8 *p = priv->sdd->data;
1079 int ret = 0;
1080
1081 while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1082 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1083 pr_warn("Malformed sdd structure\n");
1084 return -1;
1085 }
1086 switch (p[0]) {
1087 case SDD_PTA_CFG_ELT_ID: {
1088 u16 v;
1089 if (p[1] < 4) {
1090 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1091 ret = -1;
1092 break;
1093 }
1094 v = le16_to_cpu(*((u16 *)(p + 2)));
1095 if (!v) /* non-zero means this is enabled */
1096 break;
1097
1098 v = le16_to_cpu(*((u16 *)(p + 4)));
1099 priv->conf_listen_interval = (v >> 7) & 0x1F;
1100 pr_debug("PTA found; Listen Interval %d\n",
1101 priv->conf_listen_interval);
1102 break;
1103 }
1104 case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1105 u16 clk = le16_to_cpu(*((u16 *)(p + 2)));
1106 if (clk != priv->hw_refclk)
1107 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1108 clk, priv->hw_refclk);
1109 break;
1110 }
1111 default:
1112 break;
1113 }
1114 p += p[1] + 2;
1115 }
1116
1117 if (!priv->bt_present) {
1118 pr_debug("PTA element NOT found.\n");
1119 priv->conf_listen_interval = 0;
1120 }
1121 return ret;
1122 }
1123
1124 int cw1200_setup_mac(struct cw1200_common *priv)
1125 {
1126 int ret = 0;
1127
1128 /* NOTE: There is a bug in FW: it reports signal
1129 * as RSSI if RSSI subscription is enabled.
1130 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1131 *
1132 * NOTE2: RSSI based reports have been switched to RCPI, since
1133 * FW has a bug and RSSI reported values are not stable,
1134 * what can leads to signal level oscilations in user-end applications
1135 */
1136 struct wsm_rcpi_rssi_threshold threshold = {
1137 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1138 WSM_RCPI_RSSI_DONT_USE_UPPER |
1139 WSM_RCPI_RSSI_DONT_USE_LOWER,
1140 .rollingAverageCount = 16,
1141 };
1142
1143 struct wsm_configuration cfg = {
1144 .dot11StationId = &priv->mac_addr[0],
1145 };
1146
1147 /* Remember the decission here to make sure, we will handle
1148 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1149 */
1150 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1151 priv->cqm_use_rssi = true;
1152
1153 if (!priv->sdd) {
1154 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1155 if (ret) {
1156 pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1157 return ret;
1158 }
1159 cw1200_parse_sdd_file(priv);
1160 }
1161
1162 cfg.dpdData = priv->sdd->data;
1163 cfg.dpdData_size = priv->sdd->size;
1164 ret = wsm_configuration(priv, &cfg);
1165 if (ret)
1166 return ret;
1167
1168 /* Configure RSSI/SCPI reporting as RSSI. */
1169 wsm_set_rcpi_rssi_threshold(priv, &threshold);
1170
1171 return 0;
1172 }
1173
1174 static void cw1200_join_complete(struct cw1200_common *priv)
1175 {
1176 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1177
1178 priv->join_pending = false;
1179 if (priv->join_complete_status) {
1180 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1181 cw1200_update_listening(priv, priv->listening);
1182 cw1200_do_unjoin(priv);
1183 ieee80211_connection_loss(priv->vif);
1184 } else {
1185 if (priv->mode == NL80211_IFTYPE_ADHOC)
1186 priv->join_status = CW1200_JOIN_STATUS_IBSS;
1187 else
1188 priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1189 }
1190 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1191 }
1192
1193 void cw1200_join_complete_work(struct work_struct *work)
1194 {
1195 struct cw1200_common *priv =
1196 container_of(work, struct cw1200_common, join_complete_work);
1197 mutex_lock(&priv->conf_mutex);
1198 cw1200_join_complete(priv);
1199 mutex_unlock(&priv->conf_mutex);
1200 }
1201
1202 void cw1200_join_complete_cb(struct cw1200_common *priv,
1203 struct wsm_join_complete *arg)
1204 {
1205 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1206 arg->status);
1207
1208 if (cancel_delayed_work(&priv->join_timeout)) {
1209 priv->join_complete_status = arg->status;
1210 queue_work(priv->workqueue, &priv->join_complete_work);
1211 }
1212 }
1213
1214 /* MUST be called with tx_lock held! It will be unlocked for us. */
1215 static void cw1200_do_join(struct cw1200_common *priv)
1216 {
1217 const u8 *bssid;
1218 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1219 struct cfg80211_bss *bss = NULL;
1220 struct wsm_protected_mgmt_policy mgmt_policy;
1221 struct wsm_join join = {
1222 .mode = conf->ibss_joined ?
1223 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1224 .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1225 .probe_for_join = 1,
1226 .atim_window = 0,
1227 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1228 conf->basic_rates),
1229 };
1230 if (delayed_work_pending(&priv->join_timeout)) {
1231 pr_warn("[STA] - Join request already pending, skipping..\n");
1232 wsm_unlock_tx(priv);
1233 return;
1234 }
1235
1236 if (priv->join_status)
1237 cw1200_do_unjoin(priv);
1238
1239 bssid = priv->vif->bss_conf.bssid;
1240
1241 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel,
1242 bssid, NULL, 0, 0, 0);
1243
1244 if (!bss && !conf->ibss_joined) {
1245 wsm_unlock_tx(priv);
1246 return;
1247 }
1248
1249 mutex_lock(&priv->conf_mutex);
1250
1251 /* Under the conf lock: check scan status and
1252 * bail out if it is in progress.
1253 */
1254 if (atomic_read(&priv->scan.in_progress)) {
1255 wsm_unlock_tx(priv);
1256 goto done_put;
1257 }
1258
1259 priv->join_pending = true;
1260
1261 /* Sanity check basic rates */
1262 if (!join.basic_rate_set)
1263 join.basic_rate_set = 7;
1264
1265 /* Sanity check beacon interval */
1266 if (!priv->beacon_int)
1267 priv->beacon_int = 1;
1268
1269 join.beacon_interval = priv->beacon_int;
1270
1271 /* BT Coex related changes */
1272 if (priv->bt_present) {
1273 if (((priv->conf_listen_interval * 100) %
1274 priv->beacon_int) == 0)
1275 priv->listen_interval =
1276 ((priv->conf_listen_interval * 100) /
1277 priv->beacon_int);
1278 else
1279 priv->listen_interval =
1280 ((priv->conf_listen_interval * 100) /
1281 priv->beacon_int + 1);
1282 }
1283
1284 if (priv->hw->conf.ps_dtim_period)
1285 priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1286 join.dtim_period = priv->join_dtim_period;
1287
1288 join.channel_number = priv->channel->hw_value;
1289 join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
1290 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1291
1292 memcpy(join.bssid, bssid, sizeof(join.bssid));
1293
1294 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1295 join.bssid,
1296 join.dtim_period, priv->beacon_int);
1297
1298 if (!conf->ibss_joined) {
1299 const u8 *ssidie;
1300 rcu_read_lock();
1301 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1302 if (ssidie) {
1303 join.ssid_len = ssidie[1];
1304 memcpy(join.ssid, &ssidie[2], join.ssid_len);
1305 }
1306 rcu_read_unlock();
1307 }
1308
1309 if (priv->vif->p2p) {
1310 join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1311 join.basic_rate_set =
1312 cw1200_rate_mask_to_wsm(priv, 0xFF0);
1313 }
1314
1315 /* Enable asynchronous join calls */
1316 if (!conf->ibss_joined) {
1317 join.flags |= WSM_JOIN_FLAGS_FORCE;
1318 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1319 }
1320
1321 wsm_flush_tx(priv);
1322
1323 /* Stay Awake for Join and Auth Timeouts and a bit more */
1324 cw1200_pm_stay_awake(&priv->pm_state,
1325 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1326
1327 cw1200_update_listening(priv, false);
1328
1329 /* Turn on Block ACKs */
1330 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1331 priv->ba_rx_tid_mask);
1332
1333 /* Set up timeout */
1334 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1335 priv->join_status = CW1200_JOIN_STATUS_JOINING;
1336 queue_delayed_work(priv->workqueue,
1337 &priv->join_timeout,
1338 CW1200_JOIN_TIMEOUT);
1339 }
1340
1341 /* 802.11w protected mgmt frames */
1342 mgmt_policy.protectedMgmtEnable = 0;
1343 mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1344 mgmt_policy.encryptionForAuthFrame = 1;
1345 wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1346
1347 /* Perform actual join */
1348 if (wsm_join(priv, &join)) {
1349 pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1350 cancel_delayed_work_sync(&priv->join_timeout);
1351 cw1200_update_listening(priv, priv->listening);
1352 /* Tx lock still held, unjoin will clear it. */
1353 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1354 wsm_unlock_tx(priv);
1355 } else {
1356 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1357 cw1200_join_complete(priv); /* Will clear tx_lock */
1358
1359 /* Upload keys */
1360 cw1200_upload_keys(priv);
1361
1362 /* Due to beacon filtering it is possible that the
1363 * AP's beacon is not known for the mac80211 stack.
1364 * Disable filtering temporary to make sure the stack
1365 * receives at least one
1366 */
1367 priv->disable_beacon_filter = true;
1368 }
1369 cw1200_update_filtering(priv);
1370
1371 done_put:
1372 mutex_unlock(&priv->conf_mutex);
1373 if (bss)
1374 cfg80211_put_bss(priv->hw->wiphy, bss);
1375 }
1376
1377 void cw1200_join_timeout(struct work_struct *work)
1378 {
1379 struct cw1200_common *priv =
1380 container_of(work, struct cw1200_common, join_timeout.work);
1381 pr_debug("[WSM] Join timed out.\n");
1382 wsm_lock_tx(priv);
1383 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1384 wsm_unlock_tx(priv);
1385 }
1386
1387 static void cw1200_do_unjoin(struct cw1200_common *priv)
1388 {
1389 struct wsm_reset reset = {
1390 .reset_statistics = true,
1391 };
1392
1393 cancel_delayed_work_sync(&priv->join_timeout);
1394
1395 mutex_lock(&priv->conf_mutex);
1396 priv->join_pending = false;
1397
1398 if (atomic_read(&priv->scan.in_progress)) {
1399 if (priv->delayed_unjoin)
1400 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1401 else
1402 priv->delayed_unjoin = true;
1403 goto done;
1404 }
1405
1406 priv->delayed_link_loss = false;
1407
1408 if (!priv->join_status)
1409 goto done;
1410
1411 if (priv->join_status > CW1200_JOIN_STATUS_IBSS) {
1412 wiphy_err(priv->hw->wiphy, "Unexpected: join status: %d\n",
1413 priv->join_status);
1414 BUG_ON(1);
1415 }
1416
1417 cancel_work_sync(&priv->update_filtering_work);
1418 cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1419 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1420
1421 /* Unjoin is a reset. */
1422 wsm_flush_tx(priv);
1423 wsm_keep_alive_period(priv, 0);
1424 wsm_reset(priv, &reset);
1425 wsm_set_output_power(priv, priv->output_power * 10);
1426 priv->join_dtim_period = 0;
1427 cw1200_setup_mac(priv);
1428 cw1200_free_event_queue(priv);
1429 cancel_work_sync(&priv->event_handler);
1430 cw1200_update_listening(priv, priv->listening);
1431 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1432
1433 /* Disable Block ACKs */
1434 wsm_set_block_ack_policy(priv, 0, 0);
1435
1436 priv->disable_beacon_filter = false;
1437 cw1200_update_filtering(priv);
1438 memset(&priv->association_mode, 0,
1439 sizeof(priv->association_mode));
1440 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1441 priv->setbssparams_done = false;
1442 memset(&priv->firmware_ps_mode, 0,
1443 sizeof(priv->firmware_ps_mode));
1444
1445 pr_debug("[STA] Unjoin completed.\n");
1446
1447 done:
1448 mutex_unlock(&priv->conf_mutex);
1449 }
1450
1451 void cw1200_unjoin_work(struct work_struct *work)
1452 {
1453 struct cw1200_common *priv =
1454 container_of(work, struct cw1200_common, unjoin_work);
1455
1456 cw1200_do_unjoin(priv);
1457
1458 /* Tell the stack we're dead */
1459 ieee80211_connection_loss(priv->vif);
1460
1461 wsm_unlock_tx(priv);
1462 }
1463
1464 int cw1200_enable_listening(struct cw1200_common *priv)
1465 {
1466 struct wsm_start start = {
1467 .mode = WSM_START_MODE_P2P_DEV,
1468 .band = WSM_PHY_BAND_2_4G,
1469 .beacon_interval = 100,
1470 .dtim_period = 1,
1471 .probe_delay = 0,
1472 .basic_rate_set = 0x0F,
1473 };
1474
1475 if (priv->channel) {
1476 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
1477 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1478 start.channel_number = priv->channel->hw_value;
1479 } else {
1480 start.band = WSM_PHY_BAND_2_4G;
1481 start.channel_number = 1;
1482 }
1483
1484 return wsm_start(priv, &start);
1485 }
1486
1487 int cw1200_disable_listening(struct cw1200_common *priv)
1488 {
1489 int ret;
1490 struct wsm_reset reset = {
1491 .reset_statistics = true,
1492 };
1493 ret = wsm_reset(priv, &reset);
1494 return ret;
1495 }
1496
1497 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1498 {
1499 if (enabled) {
1500 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1501 if (!cw1200_enable_listening(priv))
1502 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1503 wsm_set_probe_responder(priv, true);
1504 }
1505 } else {
1506 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1507 if (!cw1200_disable_listening(priv))
1508 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1509 wsm_set_probe_responder(priv, false);
1510 }
1511 }
1512 }
1513
1514 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1515 const struct wsm_edca_params *arg)
1516 {
1517 int ret;
1518 u16 uapsd_flags = 0;
1519
1520 /* Here's the mapping AC [queue, bit]
1521 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1522 */
1523
1524 if (arg->uapsd_enable[0])
1525 uapsd_flags |= 1 << 3;
1526
1527 if (arg->uapsd_enable[1])
1528 uapsd_flags |= 1 << 2;
1529
1530 if (arg->uapsd_enable[2])
1531 uapsd_flags |= 1 << 1;
1532
1533 if (arg->uapsd_enable[3])
1534 uapsd_flags |= 1;
1535
1536 /* Currently pseudo U-APSD operation is not supported, so setting
1537 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1538 * AutoTriggerStep to 0
1539 */
1540
1541 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1542 priv->uapsd_info.min_auto_trigger_interval = 0;
1543 priv->uapsd_info.max_auto_trigger_interval = 0;
1544 priv->uapsd_info.auto_trigger_step = 0;
1545
1546 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1547 return ret;
1548 }
1549
1550 /* ******************************************************************** */
1551 /* AP API */
1552
1553 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1554 struct ieee80211_sta *sta)
1555 {
1556 struct cw1200_common *priv = hw->priv;
1557 struct cw1200_sta_priv *sta_priv =
1558 (struct cw1200_sta_priv *)&sta->drv_priv;
1559 struct cw1200_link_entry *entry;
1560 struct sk_buff *skb;
1561
1562 if (priv->mode != NL80211_IFTYPE_AP)
1563 return 0;
1564
1565 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1566 if (WARN_ON(!sta_priv->link_id)) {
1567 wiphy_info(priv->hw->wiphy,
1568 "[AP] No more link IDs available.\n");
1569 return -ENOENT;
1570 }
1571
1572 entry = &priv->link_id_db[sta_priv->link_id - 1];
1573 spin_lock_bh(&priv->ps_state_lock);
1574 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1575 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1576 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1577 entry->status = CW1200_LINK_HARD;
1578 while ((skb = skb_dequeue(&entry->rx_queue)))
1579 ieee80211_rx_irqsafe(priv->hw, skb);
1580 spin_unlock_bh(&priv->ps_state_lock);
1581 return 0;
1582 }
1583
1584 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1585 struct ieee80211_sta *sta)
1586 {
1587 struct cw1200_common *priv = hw->priv;
1588 struct cw1200_sta_priv *sta_priv =
1589 (struct cw1200_sta_priv *)&sta->drv_priv;
1590 struct cw1200_link_entry *entry;
1591
1592 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1593 return 0;
1594
1595 entry = &priv->link_id_db[sta_priv->link_id - 1];
1596 spin_lock_bh(&priv->ps_state_lock);
1597 entry->status = CW1200_LINK_RESERVE;
1598 entry->timestamp = jiffies;
1599 wsm_lock_tx_async(priv);
1600 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1601 wsm_unlock_tx(priv);
1602 spin_unlock_bh(&priv->ps_state_lock);
1603 flush_workqueue(priv->workqueue);
1604 return 0;
1605 }
1606
1607 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1608 struct ieee80211_vif *vif,
1609 enum sta_notify_cmd notify_cmd,
1610 int link_id)
1611 {
1612 struct cw1200_common *priv = dev->priv;
1613 u32 bit, prev;
1614
1615 /* Zero link id means "for all link IDs" */
1616 if (link_id)
1617 bit = BIT(link_id);
1618 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1619 bit = 0;
1620 else
1621 bit = priv->link_id_map;
1622 prev = priv->sta_asleep_mask & bit;
1623
1624 switch (notify_cmd) {
1625 case STA_NOTIFY_SLEEP:
1626 if (!prev) {
1627 if (priv->buffered_multicasts &&
1628 !priv->sta_asleep_mask)
1629 queue_work(priv->workqueue,
1630 &priv->multicast_start_work);
1631 priv->sta_asleep_mask |= bit;
1632 }
1633 break;
1634 case STA_NOTIFY_AWAKE:
1635 if (prev) {
1636 priv->sta_asleep_mask &= ~bit;
1637 priv->pspoll_mask &= ~bit;
1638 if (priv->tx_multicast && link_id &&
1639 !priv->sta_asleep_mask)
1640 queue_work(priv->workqueue,
1641 &priv->multicast_stop_work);
1642 cw1200_bh_wakeup(priv);
1643 }
1644 break;
1645 }
1646 }
1647
1648 void cw1200_sta_notify(struct ieee80211_hw *dev,
1649 struct ieee80211_vif *vif,
1650 enum sta_notify_cmd notify_cmd,
1651 struct ieee80211_sta *sta)
1652 {
1653 struct cw1200_common *priv = dev->priv;
1654 struct cw1200_sta_priv *sta_priv =
1655 (struct cw1200_sta_priv *)&sta->drv_priv;
1656
1657 spin_lock_bh(&priv->ps_state_lock);
1658 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1659 spin_unlock_bh(&priv->ps_state_lock);
1660 }
1661
1662 static void cw1200_ps_notify(struct cw1200_common *priv,
1663 int link_id, bool ps)
1664 {
1665 if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1666 return;
1667
1668 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1669 ps ? "Stop" : "Start",
1670 link_id, priv->sta_asleep_mask);
1671
1672 __cw1200_sta_notify(priv->hw, priv->vif,
1673 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1674 }
1675
1676 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1677 {
1678 struct sk_buff *skb;
1679 struct wsm_update_ie update_ie = {
1680 .what = WSM_UPDATE_IE_BEACON,
1681 .count = 1,
1682 };
1683 u16 tim_offset, tim_length;
1684
1685 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1686
1687 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1688 &tim_offset, &tim_length);
1689 if (!skb) {
1690 if (!__cw1200_flush(priv, true))
1691 wsm_unlock_tx(priv);
1692 return -ENOENT;
1693 }
1694
1695 if (tim_offset && tim_length >= 6) {
1696 /* Ignore DTIM count from mac80211:
1697 * firmware handles DTIM internally.
1698 */
1699 skb->data[tim_offset + 2] = 0;
1700
1701 /* Set/reset aid0 bit */
1702 if (aid0_bit_set)
1703 skb->data[tim_offset + 4] |= 1;
1704 else
1705 skb->data[tim_offset + 4] &= ~1;
1706 }
1707
1708 update_ie.ies = &skb->data[tim_offset];
1709 update_ie.length = tim_length;
1710 wsm_update_ie(priv, &update_ie);
1711
1712 dev_kfree_skb(skb);
1713
1714 return 0;
1715 }
1716
1717 void cw1200_set_tim_work(struct work_struct *work)
1718 {
1719 struct cw1200_common *priv =
1720 container_of(work, struct cw1200_common, set_tim_work);
1721 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1722 }
1723
1724 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1725 bool set)
1726 {
1727 struct cw1200_common *priv = dev->priv;
1728 queue_work(priv->workqueue, &priv->set_tim_work);
1729 return 0;
1730 }
1731
1732 void cw1200_set_cts_work(struct work_struct *work)
1733 {
1734 struct cw1200_common *priv =
1735 container_of(work, struct cw1200_common, set_cts_work);
1736
1737 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1738 struct wsm_update_ie update_ie = {
1739 .what = WSM_UPDATE_IE_BEACON,
1740 .count = 1,
1741 .ies = erp_ie,
1742 .length = 3,
1743 };
1744 u32 erp_info;
1745 __le32 use_cts_prot;
1746 mutex_lock(&priv->conf_mutex);
1747 erp_info = priv->erp_info;
1748 mutex_unlock(&priv->conf_mutex);
1749 use_cts_prot =
1750 erp_info & WLAN_ERP_USE_PROTECTION ?
1751 __cpu_to_le32(1) : 0;
1752
1753 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1754
1755 pr_debug("[STA] ERP information 0x%x\n", erp_info);
1756
1757 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1758 &use_cts_prot, sizeof(use_cts_prot));
1759 wsm_update_ie(priv, &update_ie);
1760
1761 return;
1762 }
1763
1764 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1765 {
1766 struct wsm_override_internal_txrate arg;
1767 int ret = 0;
1768
1769 if (priv->mode == NL80211_IFTYPE_STATION) {
1770 /* Plumb PSPOLL and NULL template */
1771 cw1200_upload_pspoll(priv);
1772 cw1200_upload_null(priv);
1773 cw1200_upload_qosnull(priv);
1774 } else {
1775 return 0;
1776 }
1777
1778 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1779
1780 if (!priv->vif->p2p) {
1781 /* STATION mode */
1782 if (priv->bss_params.operational_rate_set & ~0xF) {
1783 pr_debug("[STA] STA has ERP rates\n");
1784 /* G or BG mode */
1785 arg.internalTxRate = (__ffs(
1786 priv->bss_params.operational_rate_set & ~0xF));
1787 } else {
1788 pr_debug("[STA] STA has non ERP rates\n");
1789 /* B only mode */
1790 arg.internalTxRate = (__ffs(priv->association_mode.basic_rate_set));
1791 }
1792 arg.nonErpInternalTxRate = (__ffs(priv->association_mode.basic_rate_set));
1793 } else {
1794 /* P2P mode */
1795 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1796 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1797 }
1798
1799 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1800 priv->mode,
1801 arg.internalTxRate,
1802 arg.nonErpInternalTxRate);
1803
1804 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1805 &arg, sizeof(arg));
1806
1807 return ret;
1808 }
1809
1810 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1811 struct ieee80211_vif *vif,
1812 struct ieee80211_bss_conf *info,
1813 u32 changed)
1814 {
1815 struct cw1200_common *priv = dev->priv;
1816 bool do_join = false;
1817
1818 mutex_lock(&priv->conf_mutex);
1819
1820 pr_debug("BSS CHANGED: %08x\n", changed);
1821
1822 /* TODO: BSS_CHANGED_QOS */
1823 /* TODO: BSS_CHANGED_TXPOWER */
1824
1825 if (changed & BSS_CHANGED_ARP_FILTER) {
1826 struct wsm_mib_arp_ipv4_filter filter = {0};
1827 int i;
1828
1829 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1830 info->arp_addr_cnt);
1831
1832 /* Currently only one IP address is supported by firmware.
1833 * In case of more IPs arp filtering will be disabled.
1834 */
1835 if (info->arp_addr_cnt > 0 &&
1836 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1837 for (i = 0; i < info->arp_addr_cnt; i++) {
1838 filter.ipv4addrs[i] = info->arp_addr_list[i];
1839 pr_debug("[STA] addr[%d]: 0x%X\n",
1840 i, filter.ipv4addrs[i]);
1841 }
1842 filter.enable = __cpu_to_le32(1);
1843 }
1844
1845 pr_debug("[STA] arp ip filter enable: %d\n",
1846 __le32_to_cpu(filter.enable));
1847
1848 wsm_set_arp_ipv4_filter(priv, &filter);
1849 }
1850
1851 if (changed &
1852 (BSS_CHANGED_BEACON |
1853 BSS_CHANGED_AP_PROBE_RESP |
1854 BSS_CHANGED_BSSID |
1855 BSS_CHANGED_SSID |
1856 BSS_CHANGED_IBSS)) {
1857 pr_debug("BSS_CHANGED_BEACON\n");
1858 priv->beacon_int = info->beacon_int;
1859 cw1200_update_beaconing(priv);
1860 cw1200_upload_beacon(priv);
1861 }
1862
1863 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1864 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1865
1866 if (priv->enable_beacon != info->enable_beacon) {
1867 cw1200_enable_beaconing(priv, info->enable_beacon);
1868 priv->enable_beacon = info->enable_beacon;
1869 }
1870 }
1871
1872 if (changed & BSS_CHANGED_BEACON_INT) {
1873 pr_debug("CHANGED_BEACON_INT\n");
1874 if (info->ibss_joined)
1875 do_join = true;
1876 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1877 cw1200_update_beaconing(priv);
1878 }
1879
1880 /* assoc/disassoc, or maybe AID changed */
1881 if (changed & BSS_CHANGED_ASSOC) {
1882 wsm_lock_tx(priv);
1883 priv->wep_default_key_id = -1;
1884 wsm_unlock_tx(priv);
1885 }
1886
1887 if (changed & BSS_CHANGED_BSSID) {
1888 pr_debug("BSS_CHANGED_BSSID\n");
1889 do_join = true;
1890 }
1891
1892 if (changed &
1893 (BSS_CHANGED_ASSOC |
1894 BSS_CHANGED_BSSID |
1895 BSS_CHANGED_IBSS |
1896 BSS_CHANGED_BASIC_RATES |
1897 BSS_CHANGED_HT)) {
1898 pr_debug("BSS_CHANGED_ASSOC\n");
1899 if (info->assoc) {
1900 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1901 ieee80211_connection_loss(vif);
1902 mutex_unlock(&priv->conf_mutex);
1903 return;
1904 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1905 priv->join_status = CW1200_JOIN_STATUS_STA;
1906 }
1907 } else {
1908 do_join = true;
1909 }
1910
1911 if (info->assoc || info->ibss_joined) {
1912 struct ieee80211_sta *sta = NULL;
1913 u32 val = 0;
1914
1915 if (info->dtim_period)
1916 priv->join_dtim_period = info->dtim_period;
1917 priv->beacon_int = info->beacon_int;
1918
1919 rcu_read_lock();
1920
1921 if (info->bssid && !info->ibss_joined)
1922 sta = ieee80211_find_sta(vif, info->bssid);
1923 if (sta) {
1924 priv->ht_info.ht_cap = sta->ht_cap;
1925 priv->bss_params.operational_rate_set =
1926 cw1200_rate_mask_to_wsm(priv,
1927 sta->supp_rates[priv->channel->band]);
1928 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1929 priv->ht_info.operation_mode = info->ht_operation_mode;
1930 } else {
1931 memset(&priv->ht_info, 0,
1932 sizeof(priv->ht_info));
1933 priv->bss_params.operational_rate_set = -1;
1934 }
1935 rcu_read_unlock();
1936
1937 /* Non Greenfield stations present */
1938 if (priv->ht_info.operation_mode &
1939 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1940 val |= WSM_NON_GREENFIELD_STA_PRESENT;
1941
1942 /* Set HT protection method */
1943 val |= (priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2;
1944
1945 /* TODO:
1946 * STBC_param.dual_cts
1947 * STBC_param.LSIG_TXOP_FILL
1948 */
1949
1950 val = cpu_to_le32(val);
1951 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1952 &val, sizeof(val));
1953
1954 priv->association_mode.greenfield =
1955 cw1200_ht_greenfield(&priv->ht_info);
1956 priv->association_mode.flags =
1957 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1958 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1959 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1960 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1961 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1962 priv->association_mode.preamble =
1963 info->use_short_preamble ?
1964 WSM_JOIN_PREAMBLE_SHORT :
1965 WSM_JOIN_PREAMBLE_LONG;
1966 priv->association_mode.basic_rate_set = __cpu_to_le32(
1967 cw1200_rate_mask_to_wsm(priv,
1968 info->basic_rates));
1969 priv->association_mode.mpdu_start_spacing =
1970 cw1200_ht_ampdu_density(&priv->ht_info);
1971
1972 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1973 cancel_work_sync(&priv->unjoin_work);
1974
1975 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1976 priv->bss_params.aid = info->aid;
1977
1978 if (priv->join_dtim_period < 1)
1979 priv->join_dtim_period = 1;
1980
1981 pr_debug("[STA] DTIM %d, interval: %d\n",
1982 priv->join_dtim_period, priv->beacon_int);
1983 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1984 priv->association_mode.preamble,
1985 priv->association_mode.greenfield,
1986 priv->bss_params.aid,
1987 priv->bss_params.operational_rate_set,
1988 priv->association_mode.basic_rate_set);
1989 wsm_set_association_mode(priv, &priv->association_mode);
1990
1991 if (!info->ibss_joined) {
1992 wsm_keep_alive_period(priv, 30 /* sec */);
1993 wsm_set_bss_params(priv, &priv->bss_params);
1994 priv->setbssparams_done = true;
1995 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1996 cw1200_set_pm(priv, &priv->powersave_mode);
1997 }
1998 if (priv->vif->p2p) {
1999 pr_debug("[STA] Setting p2p powersave configuration.\n");
2000 wsm_set_p2p_ps_modeinfo(priv,
2001 &priv->p2p_ps_modeinfo);
2002 }
2003 if (priv->bt_present)
2004 cw1200_set_btcoexinfo(priv);
2005 } else {
2006 memset(&priv->association_mode, 0,
2007 sizeof(priv->association_mode));
2008 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
2009 }
2010 }
2011
2012 /* ERP Protection */
2013 if (changed & (BSS_CHANGED_ASSOC |
2014 BSS_CHANGED_ERP_CTS_PROT |
2015 BSS_CHANGED_ERP_PREAMBLE)) {
2016 u32 prev_erp_info = priv->erp_info;
2017 if (info->use_cts_prot)
2018 priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2019 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2020 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2021
2022 if (info->use_short_preamble)
2023 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2024 else
2025 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2026
2027 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2028
2029 if (prev_erp_info != priv->erp_info)
2030 queue_work(priv->workqueue, &priv->set_cts_work);
2031 }
2032
2033 /* ERP Slottime */
2034 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2035 __le32 slot_time = info->use_short_slot ?
2036 __cpu_to_le32(9) : __cpu_to_le32(20);
2037 pr_debug("[STA] Slot time: %d us.\n",
2038 __le32_to_cpu(slot_time));
2039 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2040 &slot_time, sizeof(slot_time));
2041 }
2042
2043 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2044 struct wsm_rcpi_rssi_threshold threshold = {
2045 .rollingAverageCount = 8,
2046 };
2047 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2048 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2049 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2050 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2051
2052 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2053 /* RSSI subscription enabled */
2054 /* TODO: It's not a correct way of setting threshold.
2055 * Upper and lower must be set equal here and adjusted
2056 * in callback. However current implementation is much
2057 * more relaible and stable.
2058 */
2059
2060 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2061 * RSSI = RCPI / 2 - 110
2062 */
2063 if (priv->cqm_use_rssi) {
2064 threshold.upperThreshold =
2065 info->cqm_rssi_thold + info->cqm_rssi_hyst;
2066 threshold.lowerThreshold =
2067 info->cqm_rssi_thold;
2068 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2069 } else {
2070 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2071 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2072 }
2073 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2074 } else {
2075 /* There is a bug in FW, see sta.c. We have to enable
2076 * dummy subscription to get correct RSSI values.
2077 */
2078 threshold.rssiRcpiMode |=
2079 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2080 WSM_RCPI_RSSI_DONT_USE_UPPER |
2081 WSM_RCPI_RSSI_DONT_USE_LOWER;
2082 if (priv->cqm_use_rssi)
2083 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2084 }
2085 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2086 }
2087 mutex_unlock(&priv->conf_mutex);
2088
2089 if (do_join) {
2090 wsm_lock_tx(priv);
2091 cw1200_do_join(priv); /* Will unlock it for us */
2092 }
2093 }
2094
2095 void cw1200_multicast_start_work(struct work_struct *work)
2096 {
2097 struct cw1200_common *priv =
2098 container_of(work, struct cw1200_common, multicast_start_work);
2099 long tmo = priv->join_dtim_period *
2100 (priv->beacon_int + 20) * HZ / 1024;
2101
2102 cancel_work_sync(&priv->multicast_stop_work);
2103
2104 if (!priv->aid0_bit_set) {
2105 wsm_lock_tx(priv);
2106 cw1200_set_tim_impl(priv, true);
2107 priv->aid0_bit_set = true;
2108 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2109 wsm_unlock_tx(priv);
2110 }
2111 }
2112
2113 void cw1200_multicast_stop_work(struct work_struct *work)
2114 {
2115 struct cw1200_common *priv =
2116 container_of(work, struct cw1200_common, multicast_stop_work);
2117
2118 if (priv->aid0_bit_set) {
2119 del_timer_sync(&priv->mcast_timeout);
2120 wsm_lock_tx(priv);
2121 priv->aid0_bit_set = false;
2122 cw1200_set_tim_impl(priv, false);
2123 wsm_unlock_tx(priv);
2124 }
2125 }
2126
2127 void cw1200_mcast_timeout(unsigned long arg)
2128 {
2129 struct cw1200_common *priv =
2130 (struct cw1200_common *)arg;
2131
2132 wiphy_warn(priv->hw->wiphy,
2133 "Multicast delivery timeout.\n");
2134 spin_lock_bh(&priv->ps_state_lock);
2135 priv->tx_multicast = priv->aid0_bit_set &&
2136 priv->buffered_multicasts;
2137 if (priv->tx_multicast)
2138 cw1200_bh_wakeup(priv);
2139 spin_unlock_bh(&priv->ps_state_lock);
2140 }
2141
2142 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2143 struct ieee80211_vif *vif,
2144 enum ieee80211_ampdu_mlme_action action,
2145 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2146 u8 buf_size)
2147 {
2148 /* Aggregation is implemented fully in firmware,
2149 * including block ack negotiation. Do not allow
2150 * mac80211 stack to do anything: it interferes with
2151 * the firmware.
2152 */
2153
2154 /* Note that we still need this function stubbed. */
2155 return -ENOTSUPP;
2156 }
2157
2158 /* ******************************************************************** */
2159 /* WSM callback */
2160 void cw1200_suspend_resume(struct cw1200_common *priv,
2161 struct wsm_suspend_resume *arg)
2162 {
2163 pr_debug("[AP] %s: %s\n",
2164 arg->stop ? "stop" : "start",
2165 arg->multicast ? "broadcast" : "unicast");
2166
2167 if (arg->multicast) {
2168 bool cancel_tmo = false;
2169 spin_lock_bh(&priv->ps_state_lock);
2170 if (arg->stop) {
2171 priv->tx_multicast = false;
2172 } else {
2173 /* Firmware sends this indication every DTIM if there
2174 * is a STA in powersave connected. There is no reason
2175 * to suspend, following wakeup will consume much more
2176 * power than it could be saved.
2177 */
2178 cw1200_pm_stay_awake(&priv->pm_state,
2179 priv->join_dtim_period *
2180 (priv->beacon_int + 20) * HZ / 1024);
2181 priv->tx_multicast = (priv->aid0_bit_set &&
2182 priv->buffered_multicasts);
2183 if (priv->tx_multicast) {
2184 cancel_tmo = true;
2185 cw1200_bh_wakeup(priv);
2186 }
2187 }
2188 spin_unlock_bh(&priv->ps_state_lock);
2189 if (cancel_tmo)
2190 del_timer_sync(&priv->mcast_timeout);
2191 } else {
2192 spin_lock_bh(&priv->ps_state_lock);
2193 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2194 spin_unlock_bh(&priv->ps_state_lock);
2195 if (!arg->stop)
2196 cw1200_bh_wakeup(priv);
2197 }
2198 return;
2199 }
2200
2201 /* ******************************************************************** */
2202 /* AP privates */
2203
2204 static int cw1200_upload_beacon(struct cw1200_common *priv)
2205 {
2206 int ret = 0;
2207 struct ieee80211_mgmt *mgmt;
2208 struct wsm_template_frame frame = {
2209 .frame_type = WSM_FRAME_TYPE_BEACON,
2210 };
2211
2212 u16 tim_offset;
2213 u16 tim_len;
2214
2215 if (priv->mode == NL80211_IFTYPE_STATION ||
2216 priv->mode == NL80211_IFTYPE_MONITOR ||
2217 priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2218 goto done;
2219
2220 if (priv->vif->p2p)
2221 frame.rate = WSM_TRANSMIT_RATE_6;
2222
2223 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2224 &tim_offset, &tim_len);
2225 if (!frame.skb)
2226 return -ENOMEM;
2227
2228 ret = wsm_set_template_frame(priv, &frame);
2229
2230 if (ret)
2231 goto done;
2232
2233 /* TODO: Distill probe resp; remove TIM
2234 * and any other beacon-specific IEs
2235 */
2236 mgmt = (void *)frame.skb->data;
2237 mgmt->frame_control =
2238 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2239 IEEE80211_STYPE_PROBE_RESP);
2240
2241 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2242 if (priv->vif->p2p) {
2243 ret = wsm_set_probe_responder(priv, true);
2244 } else {
2245 ret = wsm_set_template_frame(priv, &frame);
2246 wsm_set_probe_responder(priv, false);
2247 }
2248
2249 done:
2250 dev_kfree_skb(frame.skb);
2251
2252 return ret;
2253 }
2254
2255 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2256 {
2257 int ret = 0;
2258 struct wsm_template_frame frame = {
2259 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2260 .rate = 0xFF,
2261 };
2262
2263
2264 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2265 if (!frame.skb)
2266 return -ENOMEM;
2267
2268 ret = wsm_set_template_frame(priv, &frame);
2269
2270 dev_kfree_skb(frame.skb);
2271
2272 return ret;
2273 }
2274
2275 static int cw1200_upload_null(struct cw1200_common *priv)
2276 {
2277 int ret = 0;
2278 struct wsm_template_frame frame = {
2279 .frame_type = WSM_FRAME_TYPE_NULL,
2280 .rate = 0xFF,
2281 };
2282
2283 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
2284 if (!frame.skb)
2285 return -ENOMEM;
2286
2287 ret = wsm_set_template_frame(priv, &frame);
2288
2289 dev_kfree_skb(frame.skb);
2290
2291 return ret;
2292 }
2293
2294 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2295 {
2296 int ret = 0;
2297 /* TODO: This needs to be implemented
2298
2299 struct wsm_template_frame frame = {
2300 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2301 .rate = 0xFF,
2302 };
2303
2304 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2305 if (!frame.skb)
2306 return -ENOMEM;
2307
2308 ret = wsm_set_template_frame(priv, &frame);
2309
2310 dev_kfree_skb(frame.skb);
2311
2312 */
2313 return ret;
2314 }
2315
2316 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2317 bool enable)
2318 {
2319 struct wsm_beacon_transmit transmit = {
2320 .enable_beaconing = enable,
2321 };
2322
2323 return wsm_beacon_transmit(priv, &transmit);
2324 }
2325
2326 static int cw1200_start_ap(struct cw1200_common *priv)
2327 {
2328 int ret;
2329 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2330 struct wsm_start start = {
2331 .mode = priv->vif->p2p ?
2332 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2333 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
2334 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2335 .channel_number = priv->channel->hw_value,
2336 .beacon_interval = conf->beacon_int,
2337 .dtim_period = conf->dtim_period,
2338 .preamble = conf->use_short_preamble ?
2339 WSM_JOIN_PREAMBLE_SHORT :
2340 WSM_JOIN_PREAMBLE_LONG,
2341 .probe_delay = 100,
2342 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2343 conf->basic_rates),
2344 };
2345 struct wsm_operational_mode mode = {
2346 .power_mode = cw1200_power_mode,
2347 .disable_more_flag_usage = true,
2348 };
2349
2350 memset(start.ssid, 0, sizeof(start.ssid));
2351 if (!conf->hidden_ssid) {
2352 start.ssid_len = conf->ssid_len;
2353 memcpy(start.ssid, conf->ssid, start.ssid_len);
2354 }
2355
2356 priv->beacon_int = conf->beacon_int;
2357 priv->join_dtim_period = conf->dtim_period;
2358
2359 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2360
2361 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2362 start.channel_number, start.band,
2363 start.beacon_interval, start.dtim_period,
2364 start.basic_rate_set,
2365 start.ssid_len, start.ssid);
2366 ret = wsm_start(priv, &start);
2367 if (!ret)
2368 ret = cw1200_upload_keys(priv);
2369 if (!ret && priv->vif->p2p) {
2370 pr_debug("[AP] Setting p2p powersave configuration.\n");
2371 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2372 }
2373 if (!ret) {
2374 wsm_set_block_ack_policy(priv, 0, 0);
2375 priv->join_status = CW1200_JOIN_STATUS_AP;
2376 cw1200_update_filtering(priv);
2377 }
2378 wsm_set_operational_mode(priv, &mode);
2379 return ret;
2380 }
2381
2382 static int cw1200_update_beaconing(struct cw1200_common *priv)
2383 {
2384 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2385 struct wsm_reset reset = {
2386 .link_id = 0,
2387 .reset_statistics = true,
2388 };
2389
2390 if (priv->mode == NL80211_IFTYPE_AP) {
2391 /* TODO: check if changed channel, band */
2392 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2393 priv->beacon_int != conf->beacon_int) {
2394 pr_debug("ap restarting\n");
2395 wsm_lock_tx(priv);
2396 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2397 wsm_reset(priv, &reset);
2398 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2399 cw1200_start_ap(priv);
2400 wsm_unlock_tx(priv);
2401 } else
2402 pr_debug("ap started join_status: %d\n",
2403 priv->join_status);
2404 }
2405 return 0;
2406 }
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