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Linux 3.18.86
[linux/fpc-iii.git] / drivers / net / wireless / cw1200 / sta.c
blob5b84664db13b3c0c36d27d2ef74d87cff618b2c7
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 #include <linux/etherdevice.h>
17
18 #include "cw1200.h"
19 #include "sta.h"
20 #include "fwio.h"
21 #include "bh.h"
22 #include "debug.h"
23
24 #ifndef ERP_INFO_BYTE_OFFSET
25 #define ERP_INFO_BYTE_OFFSET 2
26 #endif
27
28 static void cw1200_do_join(struct cw1200_common *priv);
29 static void cw1200_do_unjoin(struct cw1200_common *priv);
30
31 static int cw1200_upload_beacon(struct cw1200_common *priv);
32 static int cw1200_upload_pspoll(struct cw1200_common *priv);
33 static int cw1200_upload_null(struct cw1200_common *priv);
34 static int cw1200_upload_qosnull(struct cw1200_common *priv);
35 static int cw1200_start_ap(struct cw1200_common *priv);
36 static int cw1200_update_beaconing(struct cw1200_common *priv);
37 static int cw1200_enable_beaconing(struct cw1200_common *priv,
38 bool enable);
39 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
40 struct ieee80211_vif *vif,
41 enum sta_notify_cmd notify_cmd,
42 int link_id);
43 static int __cw1200_flush(struct cw1200_common *priv, bool drop);
44
45 static inline void __cw1200_free_event_queue(struct list_head *list)
46 {
47 struct cw1200_wsm_event *event, *tmp;
48 list_for_each_entry_safe(event, tmp, list, link) {
49 list_del(&event->link);
50 kfree(event);
51 }
52 }
53
54 /* ******************************************************************** */
55 /* STA API */
56
57 int cw1200_start(struct ieee80211_hw *dev)
58 {
59 struct cw1200_common *priv = dev->priv;
60 int ret = 0;
61
62 cw1200_pm_stay_awake(&priv->pm_state, HZ);
63
64 mutex_lock(&priv->conf_mutex);
65
66 /* default EDCA */
67 WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
68 WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
69 WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
70 WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
71 ret = wsm_set_edca_params(priv, &priv->edca);
72 if (ret)
73 goto out;
74
75 ret = cw1200_set_uapsd_param(priv, &priv->edca);
76 if (ret)
77 goto out;
78
79 priv->setbssparams_done = false;
80
81 memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
82 priv->mode = NL80211_IFTYPE_MONITOR;
83 priv->wep_default_key_id = -1;
84
85 priv->cqm_beacon_loss_count = 10;
86
87 ret = cw1200_setup_mac(priv);
88 if (ret)
89 goto out;
90
91 out:
92 mutex_unlock(&priv->conf_mutex);
93 return ret;
94 }
95
96 void cw1200_stop(struct ieee80211_hw *dev)
97 {
98 struct cw1200_common *priv = dev->priv;
99 LIST_HEAD(list);
100 int i;
101
102 wsm_lock_tx(priv);
103
104 while (down_trylock(&priv->scan.lock)) {
105 /* Scan is in progress. Force it to stop. */
106 priv->scan.req = NULL;
107 schedule();
108 }
109 up(&priv->scan.lock);
110
111 cancel_delayed_work_sync(&priv->scan.probe_work);
112 cancel_delayed_work_sync(&priv->scan.timeout);
113 cancel_delayed_work_sync(&priv->clear_recent_scan_work);
114 cancel_delayed_work_sync(&priv->join_timeout);
115 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
116 cancel_work_sync(&priv->unjoin_work);
117 cancel_delayed_work_sync(&priv->link_id_gc_work);
118 flush_workqueue(priv->workqueue);
119 del_timer_sync(&priv->mcast_timeout);
120 mutex_lock(&priv->conf_mutex);
121 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
122 priv->listening = false;
123
124 spin_lock(&priv->event_queue_lock);
125 list_splice_init(&priv->event_queue, &list);
126 spin_unlock(&priv->event_queue_lock);
127 __cw1200_free_event_queue(&list);
128
129
130 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
131 priv->join_pending = false;
132
133 for (i = 0; i < 4; i++)
134 cw1200_queue_clear(&priv->tx_queue[i]);
135 mutex_unlock(&priv->conf_mutex);
136 tx_policy_clean(priv);
137
138 /* HACK! */
139 if (atomic_xchg(&priv->tx_lock, 1) != 1)
140 pr_debug("[STA] TX is force-unlocked due to stop request.\n");
141
142 wsm_unlock_tx(priv);
143 atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
144 }
145
146 static int cw1200_bssloss_mitigation = 1;
147 module_param(cw1200_bssloss_mitigation, int, 0644);
148 MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
149
150
151 void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
152 int init, int good, int bad)
153 {
154 int tx = 0;
155
156 priv->delayed_link_loss = 0;
157 cancel_work_sync(&priv->bss_params_work);
158
159 pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
160 priv->bss_loss_state,
161 init, good, bad,
162 atomic_read(&priv->tx_lock),
163 priv->delayed_unjoin);
164
165 /* If we have a pending unjoin */
166 if (priv->delayed_unjoin)
167 return;
168
169 if (init) {
170 queue_delayed_work(priv->workqueue,
171 &priv->bss_loss_work,
172 HZ);
173 priv->bss_loss_state = 0;
174
175 /* Skip the confimration procedure in P2P case */
176 if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
177 tx = 1;
178 } else if (good) {
179 cancel_delayed_work_sync(&priv->bss_loss_work);
180 priv->bss_loss_state = 0;
181 queue_work(priv->workqueue, &priv->bss_params_work);
182 } else if (bad) {
183 /* XXX Should we just keep going until we time out? */
184 if (priv->bss_loss_state < 3)
185 tx = 1;
186 } else {
187 cancel_delayed_work_sync(&priv->bss_loss_work);
188 priv->bss_loss_state = 0;
189 }
190
191 /* Bypass mitigation if it's disabled */
192 if (!cw1200_bssloss_mitigation)
193 tx = 0;
194
195 /* Spit out a NULL packet to our AP if necessary */
196 if (tx) {
197 struct sk_buff *skb;
198
199 priv->bss_loss_state++;
200
201 skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
202 WARN_ON(!skb);
203 if (skb)
204 cw1200_tx(priv->hw, NULL, skb);
205 }
206 }
207
208 int cw1200_add_interface(struct ieee80211_hw *dev,
209 struct ieee80211_vif *vif)
210 {
211 int ret;
212 struct cw1200_common *priv = dev->priv;
213 /* __le32 auto_calibration_mode = __cpu_to_le32(1); */
214
215 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
216 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
217
218 mutex_lock(&priv->conf_mutex);
219
220 if (priv->mode != NL80211_IFTYPE_MONITOR) {
221 mutex_unlock(&priv->conf_mutex);
222 return -EOPNOTSUPP;
223 }
224
225 switch (vif->type) {
226 case NL80211_IFTYPE_STATION:
227 case NL80211_IFTYPE_ADHOC:
228 case NL80211_IFTYPE_MESH_POINT:
229 case NL80211_IFTYPE_AP:
230 priv->mode = vif->type;
231 break;
232 default:
233 mutex_unlock(&priv->conf_mutex);
234 return -EOPNOTSUPP;
235 }
236
237 priv->vif = vif;
238 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
239 ret = cw1200_setup_mac(priv);
240 /* Enable auto-calibration */
241 /* Exception in subsequent channel switch; disabled.
242 * wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
243 * &auto_calibration_mode, sizeof(auto_calibration_mode));
244 */
245
246 mutex_unlock(&priv->conf_mutex);
247 return ret;
248 }
249
250 void cw1200_remove_interface(struct ieee80211_hw *dev,
251 struct ieee80211_vif *vif)
252 {
253 struct cw1200_common *priv = dev->priv;
254 struct wsm_reset reset = {
255 .reset_statistics = true,
256 };
257 int i;
258
259 mutex_lock(&priv->conf_mutex);
260 switch (priv->join_status) {
261 case CW1200_JOIN_STATUS_JOINING:
262 case CW1200_JOIN_STATUS_PRE_STA:
263 case CW1200_JOIN_STATUS_STA:
264 case CW1200_JOIN_STATUS_IBSS:
265 wsm_lock_tx(priv);
266 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
267 wsm_unlock_tx(priv);
268 break;
269 case CW1200_JOIN_STATUS_AP:
270 for (i = 0; priv->link_id_map; ++i) {
271 if (priv->link_id_map & BIT(i)) {
272 reset.link_id = i;
273 wsm_reset(priv, &reset);
274 priv->link_id_map &= ~BIT(i);
275 }
276 }
277 memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
278 priv->sta_asleep_mask = 0;
279 priv->enable_beacon = false;
280 priv->tx_multicast = false;
281 priv->aid0_bit_set = false;
282 priv->buffered_multicasts = false;
283 priv->pspoll_mask = 0;
284 reset.link_id = 0;
285 wsm_reset(priv, &reset);
286 break;
287 case CW1200_JOIN_STATUS_MONITOR:
288 cw1200_update_listening(priv, false);
289 break;
290 default:
291 break;
292 }
293 priv->vif = NULL;
294 priv->mode = NL80211_IFTYPE_MONITOR;
295 memset(priv->mac_addr, 0, ETH_ALEN);
296 memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
297 cw1200_free_keys(priv);
298 cw1200_setup_mac(priv);
299 priv->listening = false;
300 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
301 if (!__cw1200_flush(priv, true))
302 wsm_unlock_tx(priv);
303
304 mutex_unlock(&priv->conf_mutex);
305 }
306
307 int cw1200_change_interface(struct ieee80211_hw *dev,
308 struct ieee80211_vif *vif,
309 enum nl80211_iftype new_type,
310 bool p2p)
311 {
312 int ret = 0;
313 pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
314 p2p, vif->type, vif->p2p);
315
316 if (new_type != vif->type || vif->p2p != p2p) {
317 cw1200_remove_interface(dev, vif);
318 vif->type = new_type;
319 vif->p2p = p2p;
320 ret = cw1200_add_interface(dev, vif);
321 }
322
323 return ret;
324 }
325
326 int cw1200_config(struct ieee80211_hw *dev, u32 changed)
327 {
328 int ret = 0;
329 struct cw1200_common *priv = dev->priv;
330 struct ieee80211_conf *conf = &dev->conf;
331
332 pr_debug("CONFIG CHANGED: %08x\n", changed);
333
334 down(&priv->scan.lock);
335 mutex_lock(&priv->conf_mutex);
336 /* TODO: IEEE80211_CONF_CHANGE_QOS */
337 /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
338
339 if (changed & IEEE80211_CONF_CHANGE_POWER) {
340 priv->output_power = conf->power_level;
341 pr_debug("[STA] TX power: %d\n", priv->output_power);
342 wsm_set_output_power(priv, priv->output_power * 10);
343 }
344
345 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
346 (priv->channel != conf->chandef.chan)) {
347 struct ieee80211_channel *ch = conf->chandef.chan;
348 struct wsm_switch_channel channel = {
349 .channel_number = ch->hw_value,
350 };
351 pr_debug("[STA] Freq %d (wsm ch: %d).\n",
352 ch->center_freq, ch->hw_value);
353
354 /* __cw1200_flush() implicitly locks tx, if successful */
355 if (!__cw1200_flush(priv, false)) {
356 if (!wsm_switch_channel(priv, &channel)) {
357 ret = wait_event_timeout(priv->channel_switch_done,
358 !priv->channel_switch_in_progress,
359 3 * HZ);
360 if (ret) {
361 /* Already unlocks if successful */
362 priv->channel = ch;
363 ret = 0;
364 } else {
365 ret = -ETIMEDOUT;
366 }
367 } else {
368 /* Unlock if switch channel fails */
369 wsm_unlock_tx(priv);
370 }
371 }
372 }
373
374 if (changed & IEEE80211_CONF_CHANGE_PS) {
375 if (!(conf->flags & IEEE80211_CONF_PS))
376 priv->powersave_mode.mode = WSM_PSM_ACTIVE;
377 else if (conf->dynamic_ps_timeout <= 0)
378 priv->powersave_mode.mode = WSM_PSM_PS;
379 else
380 priv->powersave_mode.mode = WSM_PSM_FAST_PS;
381
382 /* Firmware requires that value for this 1-byte field must
383 * be specified in units of 500us. Values above the 128ms
384 * threshold are not supported.
385 */
386 if (conf->dynamic_ps_timeout >= 0x80)
387 priv->powersave_mode.fast_psm_idle_period = 0xFF;
388 else
389 priv->powersave_mode.fast_psm_idle_period =
390 conf->dynamic_ps_timeout << 1;
391
392 if (priv->join_status == CW1200_JOIN_STATUS_STA &&
393 priv->bss_params.aid)
394 cw1200_set_pm(priv, &priv->powersave_mode);
395 }
396
397 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
398 /* TBD: It looks like it's transparent
399 * there's a monitor interface present -- use this
400 * to determine for example whether to calculate
401 * timestamps for packets or not, do not use instead
402 * of filter flags!
403 */
404 }
405
406 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
407 struct wsm_operational_mode mode = {
408 .power_mode = cw1200_power_mode,
409 .disable_more_flag_usage = true,
410 };
411
412 wsm_lock_tx(priv);
413 /* Disable p2p-dev mode forced by TX request */
414 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
415 (conf->flags & IEEE80211_CONF_IDLE) &&
416 !priv->listening) {
417 cw1200_disable_listening(priv);
418 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
419 }
420 wsm_set_operational_mode(priv, &mode);
421 wsm_unlock_tx(priv);
422 }
423
424 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
425 pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
426 conf->long_frame_max_tx_count,
427 conf->short_frame_max_tx_count);
428 spin_lock_bh(&priv->tx_policy_cache.lock);
429 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
430 priv->short_frame_max_tx_count =
431 (conf->short_frame_max_tx_count < 0x0F) ?
432 conf->short_frame_max_tx_count : 0x0F;
433 priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
434 spin_unlock_bh(&priv->tx_policy_cache.lock);
435 }
436 mutex_unlock(&priv->conf_mutex);
437 up(&priv->scan.lock);
438 return ret;
439 }
440
441 void cw1200_update_filtering(struct cw1200_common *priv)
442 {
443 int ret;
444 bool bssid_filtering = !priv->rx_filter.bssid;
445 bool is_p2p = priv->vif && priv->vif->p2p;
446 bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
447
448 static struct wsm_beacon_filter_control bf_ctrl;
449 static struct wsm_mib_beacon_filter_table bf_tbl = {
450 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
451 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
452 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
453 WSM_BEACON_FILTER_IE_HAS_APPEARED,
454 .entry[0].oui[0] = 0x50,
455 .entry[0].oui[1] = 0x6F,
456 .entry[0].oui[2] = 0x9A,
457 .entry[1].ie_id = WLAN_EID_HT_OPERATION,
458 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
459 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
460 WSM_BEACON_FILTER_IE_HAS_APPEARED,
461 .entry[2].ie_id = WLAN_EID_ERP_INFO,
462 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
463 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
464 WSM_BEACON_FILTER_IE_HAS_APPEARED,
465 };
466
467 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
468 return;
469 else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
470 bssid_filtering = false;
471
472 if (priv->disable_beacon_filter) {
473 bf_ctrl.enabled = 0;
474 bf_ctrl.bcn_count = 1;
475 bf_tbl.num = __cpu_to_le32(0);
476 } else if (is_p2p || !is_sta) {
477 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
478 WSM_BEACON_FILTER_AUTO_ERP;
479 bf_ctrl.bcn_count = 0;
480 bf_tbl.num = __cpu_to_le32(2);
481 } else {
482 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
483 bf_ctrl.bcn_count = 0;
484 bf_tbl.num = __cpu_to_le32(3);
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 (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
560 !ether_addr_equal(ha->addr, broadcast_ipv6))
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 = le16_to_cpu(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 != le16_to_cpu(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, struct ieee80211_vif *vif,
940 u32 queues, bool drop)
941 {
942 struct cw1200_common *priv = hw->priv;
943
944 switch (priv->mode) {
945 case NL80211_IFTYPE_MONITOR:
946 drop = true;
947 break;
948 case NL80211_IFTYPE_AP:
949 if (!priv->enable_beacon)
950 drop = true;
951 break;
952 }
953
954 if (!__cw1200_flush(priv, drop))
955 wsm_unlock_tx(priv);
956
957 return;
958 }
959
960 /* ******************************************************************** */
961 /* WSM callbacks */
962
963 void cw1200_free_event_queue(struct cw1200_common *priv)
964 {
965 LIST_HEAD(list);
966
967 spin_lock(&priv->event_queue_lock);
968 list_splice_init(&priv->event_queue, &list);
969 spin_unlock(&priv->event_queue_lock);
970
971 __cw1200_free_event_queue(&list);
972 }
973
974 void cw1200_event_handler(struct work_struct *work)
975 {
976 struct cw1200_common *priv =
977 container_of(work, struct cw1200_common, event_handler);
978 struct cw1200_wsm_event *event;
979 LIST_HEAD(list);
980
981 spin_lock(&priv->event_queue_lock);
982 list_splice_init(&priv->event_queue, &list);
983 spin_unlock(&priv->event_queue_lock);
984
985 list_for_each_entry(event, &list, link) {
986 switch (event->evt.id) {
987 case WSM_EVENT_ERROR:
988 pr_err("Unhandled WSM Error from LMAC\n");
989 break;
990 case WSM_EVENT_BSS_LOST:
991 pr_debug("[CQM] BSS lost.\n");
992 cancel_work_sync(&priv->unjoin_work);
993 if (!down_trylock(&priv->scan.lock)) {
994 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
995 up(&priv->scan.lock);
996 } else {
997 /* Scan is in progress. Delay reporting.
998 * Scan complete will trigger bss_loss_work
999 */
1000 priv->delayed_link_loss = 1;
1001 /* Also start a watchdog. */
1002 queue_delayed_work(priv->workqueue,
1003 &priv->bss_loss_work, 5*HZ);
1004 }
1005 break;
1006 case WSM_EVENT_BSS_REGAINED:
1007 pr_debug("[CQM] BSS regained.\n");
1008 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1009 cancel_work_sync(&priv->unjoin_work);
1010 break;
1011 case WSM_EVENT_RADAR_DETECTED:
1012 wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1013 break;
1014 case WSM_EVENT_RCPI_RSSI:
1015 {
1016 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1017 * RSSI = RCPI / 2 - 110
1018 */
1019 int rcpi_rssi = (int)(event->evt.data & 0xFF);
1020 int cqm_evt;
1021 if (priv->cqm_use_rssi)
1022 rcpi_rssi = (s8)rcpi_rssi;
1023 else
1024 rcpi_rssi = rcpi_rssi / 2 - 110;
1025
1026 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1027 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1028 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1029 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1030 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
1031 GFP_KERNEL);
1032 break;
1033 }
1034 case WSM_EVENT_BT_INACTIVE:
1035 pr_warn("Unhandled BT INACTIVE from LMAC\n");
1036 break;
1037 case WSM_EVENT_BT_ACTIVE:
1038 pr_warn("Unhandled BT ACTIVE from LMAC\n");
1039 break;
1040 }
1041 }
1042 __cw1200_free_event_queue(&list);
1043 }
1044
1045 void cw1200_bss_loss_work(struct work_struct *work)
1046 {
1047 struct cw1200_common *priv =
1048 container_of(work, struct cw1200_common, bss_loss_work.work);
1049
1050 pr_debug("[CQM] Reporting connection loss.\n");
1051 wsm_lock_tx(priv);
1052 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1053 wsm_unlock_tx(priv);
1054 }
1055
1056 void cw1200_bss_params_work(struct work_struct *work)
1057 {
1058 struct cw1200_common *priv =
1059 container_of(work, struct cw1200_common, bss_params_work);
1060 mutex_lock(&priv->conf_mutex);
1061
1062 priv->bss_params.reset_beacon_loss = 1;
1063 wsm_set_bss_params(priv, &priv->bss_params);
1064 priv->bss_params.reset_beacon_loss = 0;
1065
1066 mutex_unlock(&priv->conf_mutex);
1067 }
1068
1069 /* ******************************************************************** */
1070 /* Internal API */
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(*((__le16 *)(p + 2)));
1095 if (!v) /* non-zero means this is enabled */
1096 break;
1097
1098 v = le16_to_cpu(*((__le16 *)(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(*((__le16 *)(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_AP)
1412 goto done;
1413
1414 cancel_work_sync(&priv->update_filtering_work);
1415 cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1416 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1417
1418 /* Unjoin is a reset. */
1419 wsm_flush_tx(priv);
1420 wsm_keep_alive_period(priv, 0);
1421 wsm_reset(priv, &reset);
1422 wsm_set_output_power(priv, priv->output_power * 10);
1423 priv->join_dtim_period = 0;
1424 cw1200_setup_mac(priv);
1425 cw1200_free_event_queue(priv);
1426 cancel_work_sync(&priv->event_handler);
1427 cw1200_update_listening(priv, priv->listening);
1428 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1429
1430 /* Disable Block ACKs */
1431 wsm_set_block_ack_policy(priv, 0, 0);
1432
1433 priv->disable_beacon_filter = false;
1434 cw1200_update_filtering(priv);
1435 memset(&priv->association_mode, 0,
1436 sizeof(priv->association_mode));
1437 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1438 priv->setbssparams_done = false;
1439 memset(&priv->firmware_ps_mode, 0,
1440 sizeof(priv->firmware_ps_mode));
1441
1442 pr_debug("[STA] Unjoin completed.\n");
1443
1444 done:
1445 mutex_unlock(&priv->conf_mutex);
1446 }
1447
1448 void cw1200_unjoin_work(struct work_struct *work)
1449 {
1450 struct cw1200_common *priv =
1451 container_of(work, struct cw1200_common, unjoin_work);
1452
1453 cw1200_do_unjoin(priv);
1454
1455 /* Tell the stack we're dead */
1456 ieee80211_connection_loss(priv->vif);
1457
1458 wsm_unlock_tx(priv);
1459 }
1460
1461 int cw1200_enable_listening(struct cw1200_common *priv)
1462 {
1463 struct wsm_start start = {
1464 .mode = WSM_START_MODE_P2P_DEV,
1465 .band = WSM_PHY_BAND_2_4G,
1466 .beacon_interval = 100,
1467 .dtim_period = 1,
1468 .probe_delay = 0,
1469 .basic_rate_set = 0x0F,
1470 };
1471
1472 if (priv->channel) {
1473 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
1474 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1475 start.channel_number = priv->channel->hw_value;
1476 } else {
1477 start.band = WSM_PHY_BAND_2_4G;
1478 start.channel_number = 1;
1479 }
1480
1481 return wsm_start(priv, &start);
1482 }
1483
1484 int cw1200_disable_listening(struct cw1200_common *priv)
1485 {
1486 int ret;
1487 struct wsm_reset reset = {
1488 .reset_statistics = true,
1489 };
1490 ret = wsm_reset(priv, &reset);
1491 return ret;
1492 }
1493
1494 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1495 {
1496 if (enabled) {
1497 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1498 if (!cw1200_enable_listening(priv))
1499 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1500 wsm_set_probe_responder(priv, true);
1501 }
1502 } else {
1503 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1504 if (!cw1200_disable_listening(priv))
1505 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1506 wsm_set_probe_responder(priv, false);
1507 }
1508 }
1509 }
1510
1511 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1512 const struct wsm_edca_params *arg)
1513 {
1514 int ret;
1515 u16 uapsd_flags = 0;
1516
1517 /* Here's the mapping AC [queue, bit]
1518 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1519 */
1520
1521 if (arg->uapsd_enable[0])
1522 uapsd_flags |= 1 << 3;
1523
1524 if (arg->uapsd_enable[1])
1525 uapsd_flags |= 1 << 2;
1526
1527 if (arg->uapsd_enable[2])
1528 uapsd_flags |= 1 << 1;
1529
1530 if (arg->uapsd_enable[3])
1531 uapsd_flags |= 1;
1532
1533 /* Currently pseudo U-APSD operation is not supported, so setting
1534 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1535 * AutoTriggerStep to 0
1536 */
1537
1538 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1539 priv->uapsd_info.min_auto_trigger_interval = 0;
1540 priv->uapsd_info.max_auto_trigger_interval = 0;
1541 priv->uapsd_info.auto_trigger_step = 0;
1542
1543 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1544 return ret;
1545 }
1546
1547 /* ******************************************************************** */
1548 /* AP API */
1549
1550 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1551 struct ieee80211_sta *sta)
1552 {
1553 struct cw1200_common *priv = hw->priv;
1554 struct cw1200_sta_priv *sta_priv =
1555 (struct cw1200_sta_priv *)&sta->drv_priv;
1556 struct cw1200_link_entry *entry;
1557 struct sk_buff *skb;
1558
1559 if (priv->mode != NL80211_IFTYPE_AP)
1560 return 0;
1561
1562 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1563 if (WARN_ON(!sta_priv->link_id)) {
1564 wiphy_info(priv->hw->wiphy,
1565 "[AP] No more link IDs available.\n");
1566 return -ENOENT;
1567 }
1568
1569 entry = &priv->link_id_db[sta_priv->link_id - 1];
1570 spin_lock_bh(&priv->ps_state_lock);
1571 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1572 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1573 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1574 entry->status = CW1200_LINK_HARD;
1575 while ((skb = skb_dequeue(&entry->rx_queue)))
1576 ieee80211_rx_irqsafe(priv->hw, skb);
1577 spin_unlock_bh(&priv->ps_state_lock);
1578 return 0;
1579 }
1580
1581 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1582 struct ieee80211_sta *sta)
1583 {
1584 struct cw1200_common *priv = hw->priv;
1585 struct cw1200_sta_priv *sta_priv =
1586 (struct cw1200_sta_priv *)&sta->drv_priv;
1587 struct cw1200_link_entry *entry;
1588
1589 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1590 return 0;
1591
1592 entry = &priv->link_id_db[sta_priv->link_id - 1];
1593 spin_lock_bh(&priv->ps_state_lock);
1594 entry->status = CW1200_LINK_RESERVE;
1595 entry->timestamp = jiffies;
1596 wsm_lock_tx_async(priv);
1597 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1598 wsm_unlock_tx(priv);
1599 spin_unlock_bh(&priv->ps_state_lock);
1600 flush_workqueue(priv->workqueue);
1601 return 0;
1602 }
1603
1604 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1605 struct ieee80211_vif *vif,
1606 enum sta_notify_cmd notify_cmd,
1607 int link_id)
1608 {
1609 struct cw1200_common *priv = dev->priv;
1610 u32 bit, prev;
1611
1612 /* Zero link id means "for all link IDs" */
1613 if (link_id)
1614 bit = BIT(link_id);
1615 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1616 bit = 0;
1617 else
1618 bit = priv->link_id_map;
1619 prev = priv->sta_asleep_mask & bit;
1620
1621 switch (notify_cmd) {
1622 case STA_NOTIFY_SLEEP:
1623 if (!prev) {
1624 if (priv->buffered_multicasts &&
1625 !priv->sta_asleep_mask)
1626 queue_work(priv->workqueue,
1627 &priv->multicast_start_work);
1628 priv->sta_asleep_mask |= bit;
1629 }
1630 break;
1631 case STA_NOTIFY_AWAKE:
1632 if (prev) {
1633 priv->sta_asleep_mask &= ~bit;
1634 priv->pspoll_mask &= ~bit;
1635 if (priv->tx_multicast && link_id &&
1636 !priv->sta_asleep_mask)
1637 queue_work(priv->workqueue,
1638 &priv->multicast_stop_work);
1639 cw1200_bh_wakeup(priv);
1640 }
1641 break;
1642 }
1643 }
1644
1645 void cw1200_sta_notify(struct ieee80211_hw *dev,
1646 struct ieee80211_vif *vif,
1647 enum sta_notify_cmd notify_cmd,
1648 struct ieee80211_sta *sta)
1649 {
1650 struct cw1200_common *priv = dev->priv;
1651 struct cw1200_sta_priv *sta_priv =
1652 (struct cw1200_sta_priv *)&sta->drv_priv;
1653
1654 spin_lock_bh(&priv->ps_state_lock);
1655 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1656 spin_unlock_bh(&priv->ps_state_lock);
1657 }
1658
1659 static void cw1200_ps_notify(struct cw1200_common *priv,
1660 int link_id, bool ps)
1661 {
1662 if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1663 return;
1664
1665 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1666 ps ? "Stop" : "Start",
1667 link_id, priv->sta_asleep_mask);
1668
1669 __cw1200_sta_notify(priv->hw, priv->vif,
1670 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1671 }
1672
1673 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1674 {
1675 struct sk_buff *skb;
1676 struct wsm_update_ie update_ie = {
1677 .what = WSM_UPDATE_IE_BEACON,
1678 .count = 1,
1679 };
1680 u16 tim_offset, tim_length;
1681
1682 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1683
1684 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1685 &tim_offset, &tim_length);
1686 if (!skb) {
1687 if (!__cw1200_flush(priv, true))
1688 wsm_unlock_tx(priv);
1689 return -ENOENT;
1690 }
1691
1692 if (tim_offset && tim_length >= 6) {
1693 /* Ignore DTIM count from mac80211:
1694 * firmware handles DTIM internally.
1695 */
1696 skb->data[tim_offset + 2] = 0;
1697
1698 /* Set/reset aid0 bit */
1699 if (aid0_bit_set)
1700 skb->data[tim_offset + 4] |= 1;
1701 else
1702 skb->data[tim_offset + 4] &= ~1;
1703 }
1704
1705 update_ie.ies = &skb->data[tim_offset];
1706 update_ie.length = tim_length;
1707 wsm_update_ie(priv, &update_ie);
1708
1709 dev_kfree_skb(skb);
1710
1711 return 0;
1712 }
1713
1714 void cw1200_set_tim_work(struct work_struct *work)
1715 {
1716 struct cw1200_common *priv =
1717 container_of(work, struct cw1200_common, set_tim_work);
1718 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1719 }
1720
1721 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1722 bool set)
1723 {
1724 struct cw1200_common *priv = dev->priv;
1725 queue_work(priv->workqueue, &priv->set_tim_work);
1726 return 0;
1727 }
1728
1729 void cw1200_set_cts_work(struct work_struct *work)
1730 {
1731 struct cw1200_common *priv =
1732 container_of(work, struct cw1200_common, set_cts_work);
1733
1734 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1735 struct wsm_update_ie update_ie = {
1736 .what = WSM_UPDATE_IE_BEACON,
1737 .count = 1,
1738 .ies = erp_ie,
1739 .length = 3,
1740 };
1741 u32 erp_info;
1742 __le32 use_cts_prot;
1743 mutex_lock(&priv->conf_mutex);
1744 erp_info = priv->erp_info;
1745 mutex_unlock(&priv->conf_mutex);
1746 use_cts_prot =
1747 erp_info & WLAN_ERP_USE_PROTECTION ?
1748 __cpu_to_le32(1) : 0;
1749
1750 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1751
1752 pr_debug("[STA] ERP information 0x%x\n", erp_info);
1753
1754 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1755 &use_cts_prot, sizeof(use_cts_prot));
1756 wsm_update_ie(priv, &update_ie);
1757
1758 return;
1759 }
1760
1761 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1762 {
1763 struct wsm_override_internal_txrate arg;
1764 int ret = 0;
1765
1766 if (priv->mode == NL80211_IFTYPE_STATION) {
1767 /* Plumb PSPOLL and NULL template */
1768 cw1200_upload_pspoll(priv);
1769 cw1200_upload_null(priv);
1770 cw1200_upload_qosnull(priv);
1771 } else {
1772 return 0;
1773 }
1774
1775 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1776
1777 if (!priv->vif->p2p) {
1778 /* STATION mode */
1779 if (priv->bss_params.operational_rate_set & ~0xF) {
1780 pr_debug("[STA] STA has ERP rates\n");
1781 /* G or BG mode */
1782 arg.internalTxRate = (__ffs(
1783 priv->bss_params.operational_rate_set & ~0xF));
1784 } else {
1785 pr_debug("[STA] STA has non ERP rates\n");
1786 /* B only mode */
1787 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1788 }
1789 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1790 } else {
1791 /* P2P mode */
1792 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1793 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1794 }
1795
1796 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1797 priv->mode,
1798 arg.internalTxRate,
1799 arg.nonErpInternalTxRate);
1800
1801 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1802 &arg, sizeof(arg));
1803
1804 return ret;
1805 }
1806
1807 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1808 struct ieee80211_vif *vif,
1809 struct ieee80211_bss_conf *info,
1810 u32 changed)
1811 {
1812 struct cw1200_common *priv = dev->priv;
1813 bool do_join = false;
1814
1815 mutex_lock(&priv->conf_mutex);
1816
1817 pr_debug("BSS CHANGED: %08x\n", changed);
1818
1819 /* TODO: BSS_CHANGED_QOS */
1820 /* TODO: BSS_CHANGED_TXPOWER */
1821
1822 if (changed & BSS_CHANGED_ARP_FILTER) {
1823 struct wsm_mib_arp_ipv4_filter filter = {0};
1824 int i;
1825
1826 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1827 info->arp_addr_cnt);
1828
1829 /* Currently only one IP address is supported by firmware.
1830 * In case of more IPs arp filtering will be disabled.
1831 */
1832 if (info->arp_addr_cnt > 0 &&
1833 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1834 for (i = 0; i < info->arp_addr_cnt; i++) {
1835 filter.ipv4addrs[i] = info->arp_addr_list[i];
1836 pr_debug("[STA] addr[%d]: 0x%X\n",
1837 i, filter.ipv4addrs[i]);
1838 }
1839 filter.enable = __cpu_to_le32(1);
1840 }
1841
1842 pr_debug("[STA] arp ip filter enable: %d\n",
1843 __le32_to_cpu(filter.enable));
1844
1845 wsm_set_arp_ipv4_filter(priv, &filter);
1846 }
1847
1848 if (changed &
1849 (BSS_CHANGED_BEACON |
1850 BSS_CHANGED_AP_PROBE_RESP |
1851 BSS_CHANGED_BSSID |
1852 BSS_CHANGED_SSID |
1853 BSS_CHANGED_IBSS)) {
1854 pr_debug("BSS_CHANGED_BEACON\n");
1855 priv->beacon_int = info->beacon_int;
1856 cw1200_update_beaconing(priv);
1857 cw1200_upload_beacon(priv);
1858 }
1859
1860 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1861 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1862
1863 if (priv->enable_beacon != info->enable_beacon) {
1864 cw1200_enable_beaconing(priv, info->enable_beacon);
1865 priv->enable_beacon = info->enable_beacon;
1866 }
1867 }
1868
1869 if (changed & BSS_CHANGED_BEACON_INT) {
1870 pr_debug("CHANGED_BEACON_INT\n");
1871 if (info->ibss_joined)
1872 do_join = true;
1873 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1874 cw1200_update_beaconing(priv);
1875 }
1876
1877 /* assoc/disassoc, or maybe AID changed */
1878 if (changed & BSS_CHANGED_ASSOC) {
1879 wsm_lock_tx(priv);
1880 priv->wep_default_key_id = -1;
1881 wsm_unlock_tx(priv);
1882 }
1883
1884 if (changed & BSS_CHANGED_BSSID) {
1885 pr_debug("BSS_CHANGED_BSSID\n");
1886 do_join = true;
1887 }
1888
1889 if (changed &
1890 (BSS_CHANGED_ASSOC |
1891 BSS_CHANGED_BSSID |
1892 BSS_CHANGED_IBSS |
1893 BSS_CHANGED_BASIC_RATES |
1894 BSS_CHANGED_HT)) {
1895 pr_debug("BSS_CHANGED_ASSOC\n");
1896 if (info->assoc) {
1897 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1898 ieee80211_connection_loss(vif);
1899 mutex_unlock(&priv->conf_mutex);
1900 return;
1901 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1902 priv->join_status = CW1200_JOIN_STATUS_STA;
1903 }
1904 } else {
1905 do_join = true;
1906 }
1907
1908 if (info->assoc || info->ibss_joined) {
1909 struct ieee80211_sta *sta = NULL;
1910 __le32 htprot = 0;
1911
1912 if (info->dtim_period)
1913 priv->join_dtim_period = info->dtim_period;
1914 priv->beacon_int = info->beacon_int;
1915
1916 rcu_read_lock();
1917
1918 if (info->bssid && !info->ibss_joined)
1919 sta = ieee80211_find_sta(vif, info->bssid);
1920 if (sta) {
1921 priv->ht_info.ht_cap = sta->ht_cap;
1922 priv->bss_params.operational_rate_set =
1923 cw1200_rate_mask_to_wsm(priv,
1924 sta->supp_rates[priv->channel->band]);
1925 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1926 priv->ht_info.operation_mode = info->ht_operation_mode;
1927 } else {
1928 memset(&priv->ht_info, 0,
1929 sizeof(priv->ht_info));
1930 priv->bss_params.operational_rate_set = -1;
1931 }
1932 rcu_read_unlock();
1933
1934 /* Non Greenfield stations present */
1935 if (priv->ht_info.operation_mode &
1936 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1937 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1938
1939 /* Set HT protection method */
1940 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1941
1942 /* TODO:
1943 * STBC_param.dual_cts
1944 * STBC_param.LSIG_TXOP_FILL
1945 */
1946
1947 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1948 &htprot, sizeof(htprot));
1949
1950 priv->association_mode.greenfield =
1951 cw1200_ht_greenfield(&priv->ht_info);
1952 priv->association_mode.flags =
1953 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1954 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1955 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1956 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1957 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1958 priv->association_mode.preamble =
1959 info->use_short_preamble ?
1960 WSM_JOIN_PREAMBLE_SHORT :
1961 WSM_JOIN_PREAMBLE_LONG;
1962 priv->association_mode.basic_rate_set = __cpu_to_le32(
1963 cw1200_rate_mask_to_wsm(priv,
1964 info->basic_rates));
1965 priv->association_mode.mpdu_start_spacing =
1966 cw1200_ht_ampdu_density(&priv->ht_info);
1967
1968 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1969 cancel_work_sync(&priv->unjoin_work);
1970
1971 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1972 priv->bss_params.aid = info->aid;
1973
1974 if (priv->join_dtim_period < 1)
1975 priv->join_dtim_period = 1;
1976
1977 pr_debug("[STA] DTIM %d, interval: %d\n",
1978 priv->join_dtim_period, priv->beacon_int);
1979 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1980 priv->association_mode.preamble,
1981 priv->association_mode.greenfield,
1982 priv->bss_params.aid,
1983 priv->bss_params.operational_rate_set,
1984 priv->association_mode.basic_rate_set);
1985 wsm_set_association_mode(priv, &priv->association_mode);
1986
1987 if (!info->ibss_joined) {
1988 wsm_keep_alive_period(priv, 30 /* sec */);
1989 wsm_set_bss_params(priv, &priv->bss_params);
1990 priv->setbssparams_done = true;
1991 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1992 cw1200_set_pm(priv, &priv->powersave_mode);
1993 }
1994 if (priv->vif->p2p) {
1995 pr_debug("[STA] Setting p2p powersave configuration.\n");
1996 wsm_set_p2p_ps_modeinfo(priv,
1997 &priv->p2p_ps_modeinfo);
1998 }
1999 if (priv->bt_present)
2000 cw1200_set_btcoexinfo(priv);
2001 } else {
2002 memset(&priv->association_mode, 0,
2003 sizeof(priv->association_mode));
2004 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
2005 }
2006 }
2007
2008 /* ERP Protection */
2009 if (changed & (BSS_CHANGED_ASSOC |
2010 BSS_CHANGED_ERP_CTS_PROT |
2011 BSS_CHANGED_ERP_PREAMBLE)) {
2012 u32 prev_erp_info = priv->erp_info;
2013 if (info->use_cts_prot)
2014 priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2015 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2016 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2017
2018 if (info->use_short_preamble)
2019 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2020 else
2021 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2022
2023 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2024
2025 if (prev_erp_info != priv->erp_info)
2026 queue_work(priv->workqueue, &priv->set_cts_work);
2027 }
2028
2029 /* ERP Slottime */
2030 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2031 __le32 slot_time = info->use_short_slot ?
2032 __cpu_to_le32(9) : __cpu_to_le32(20);
2033 pr_debug("[STA] Slot time: %d us.\n",
2034 __le32_to_cpu(slot_time));
2035 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2036 &slot_time, sizeof(slot_time));
2037 }
2038
2039 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2040 struct wsm_rcpi_rssi_threshold threshold = {
2041 .rollingAverageCount = 8,
2042 };
2043 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2044 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2045 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2046 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2047
2048 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2049 /* RSSI subscription enabled */
2050 /* TODO: It's not a correct way of setting threshold.
2051 * Upper and lower must be set equal here and adjusted
2052 * in callback. However current implementation is much
2053 * more relaible and stable.
2054 */
2055
2056 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2057 * RSSI = RCPI / 2 - 110
2058 */
2059 if (priv->cqm_use_rssi) {
2060 threshold.upperThreshold =
2061 info->cqm_rssi_thold + info->cqm_rssi_hyst;
2062 threshold.lowerThreshold =
2063 info->cqm_rssi_thold;
2064 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2065 } else {
2066 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2067 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2068 }
2069 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2070 } else {
2071 /* There is a bug in FW, see sta.c. We have to enable
2072 * dummy subscription to get correct RSSI values.
2073 */
2074 threshold.rssiRcpiMode |=
2075 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2076 WSM_RCPI_RSSI_DONT_USE_UPPER |
2077 WSM_RCPI_RSSI_DONT_USE_LOWER;
2078 if (priv->cqm_use_rssi)
2079 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2080 }
2081 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2082 }
2083 mutex_unlock(&priv->conf_mutex);
2084
2085 if (do_join) {
2086 wsm_lock_tx(priv);
2087 cw1200_do_join(priv); /* Will unlock it for us */
2088 }
2089 }
2090
2091 void cw1200_multicast_start_work(struct work_struct *work)
2092 {
2093 struct cw1200_common *priv =
2094 container_of(work, struct cw1200_common, multicast_start_work);
2095 long tmo = priv->join_dtim_period *
2096 (priv->beacon_int + 20) * HZ / 1024;
2097
2098 cancel_work_sync(&priv->multicast_stop_work);
2099
2100 if (!priv->aid0_bit_set) {
2101 wsm_lock_tx(priv);
2102 cw1200_set_tim_impl(priv, true);
2103 priv->aid0_bit_set = true;
2104 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2105 wsm_unlock_tx(priv);
2106 }
2107 }
2108
2109 void cw1200_multicast_stop_work(struct work_struct *work)
2110 {
2111 struct cw1200_common *priv =
2112 container_of(work, struct cw1200_common, multicast_stop_work);
2113
2114 if (priv->aid0_bit_set) {
2115 del_timer_sync(&priv->mcast_timeout);
2116 wsm_lock_tx(priv);
2117 priv->aid0_bit_set = false;
2118 cw1200_set_tim_impl(priv, false);
2119 wsm_unlock_tx(priv);
2120 }
2121 }
2122
2123 void cw1200_mcast_timeout(unsigned long arg)
2124 {
2125 struct cw1200_common *priv =
2126 (struct cw1200_common *)arg;
2127
2128 wiphy_warn(priv->hw->wiphy,
2129 "Multicast delivery timeout.\n");
2130 spin_lock_bh(&priv->ps_state_lock);
2131 priv->tx_multicast = priv->aid0_bit_set &&
2132 priv->buffered_multicasts;
2133 if (priv->tx_multicast)
2134 cw1200_bh_wakeup(priv);
2135 spin_unlock_bh(&priv->ps_state_lock);
2136 }
2137
2138 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2139 struct ieee80211_vif *vif,
2140 enum ieee80211_ampdu_mlme_action action,
2141 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2142 u8 buf_size)
2143 {
2144 /* Aggregation is implemented fully in firmware,
2145 * including block ack negotiation. Do not allow
2146 * mac80211 stack to do anything: it interferes with
2147 * the firmware.
2148 */
2149
2150 /* Note that we still need this function stubbed. */
2151 return -ENOTSUPP;
2152 }
2153
2154 /* ******************************************************************** */
2155 /* WSM callback */
2156 void cw1200_suspend_resume(struct cw1200_common *priv,
2157 struct wsm_suspend_resume *arg)
2158 {
2159 pr_debug("[AP] %s: %s\n",
2160 arg->stop ? "stop" : "start",
2161 arg->multicast ? "broadcast" : "unicast");
2162
2163 if (arg->multicast) {
2164 bool cancel_tmo = false;
2165 spin_lock_bh(&priv->ps_state_lock);
2166 if (arg->stop) {
2167 priv->tx_multicast = false;
2168 } else {
2169 /* Firmware sends this indication every DTIM if there
2170 * is a STA in powersave connected. There is no reason
2171 * to suspend, following wakeup will consume much more
2172 * power than it could be saved.
2173 */
2174 cw1200_pm_stay_awake(&priv->pm_state,
2175 priv->join_dtim_period *
2176 (priv->beacon_int + 20) * HZ / 1024);
2177 priv->tx_multicast = (priv->aid0_bit_set &&
2178 priv->buffered_multicasts);
2179 if (priv->tx_multicast) {
2180 cancel_tmo = true;
2181 cw1200_bh_wakeup(priv);
2182 }
2183 }
2184 spin_unlock_bh(&priv->ps_state_lock);
2185 if (cancel_tmo)
2186 del_timer_sync(&priv->mcast_timeout);
2187 } else {
2188 spin_lock_bh(&priv->ps_state_lock);
2189 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2190 spin_unlock_bh(&priv->ps_state_lock);
2191 if (!arg->stop)
2192 cw1200_bh_wakeup(priv);
2193 }
2194 return;
2195 }
2196
2197 /* ******************************************************************** */
2198 /* AP privates */
2199
2200 static int cw1200_upload_beacon(struct cw1200_common *priv)
2201 {
2202 int ret = 0;
2203 struct ieee80211_mgmt *mgmt;
2204 struct wsm_template_frame frame = {
2205 .frame_type = WSM_FRAME_TYPE_BEACON,
2206 };
2207
2208 u16 tim_offset;
2209 u16 tim_len;
2210
2211 if (priv->mode == NL80211_IFTYPE_STATION ||
2212 priv->mode == NL80211_IFTYPE_MONITOR ||
2213 priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2214 goto done;
2215
2216 if (priv->vif->p2p)
2217 frame.rate = WSM_TRANSMIT_RATE_6;
2218
2219 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2220 &tim_offset, &tim_len);
2221 if (!frame.skb)
2222 return -ENOMEM;
2223
2224 ret = wsm_set_template_frame(priv, &frame);
2225
2226 if (ret)
2227 goto done;
2228
2229 /* TODO: Distill probe resp; remove TIM
2230 * and any other beacon-specific IEs
2231 */
2232 mgmt = (void *)frame.skb->data;
2233 mgmt->frame_control =
2234 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2235 IEEE80211_STYPE_PROBE_RESP);
2236
2237 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2238 if (priv->vif->p2p) {
2239 ret = wsm_set_probe_responder(priv, true);
2240 } else {
2241 ret = wsm_set_template_frame(priv, &frame);
2242 wsm_set_probe_responder(priv, false);
2243 }
2244
2245 done:
2246 dev_kfree_skb(frame.skb);
2247
2248 return ret;
2249 }
2250
2251 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2252 {
2253 int ret = 0;
2254 struct wsm_template_frame frame = {
2255 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2256 .rate = 0xFF,
2257 };
2258
2259
2260 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2261 if (!frame.skb)
2262 return -ENOMEM;
2263
2264 ret = wsm_set_template_frame(priv, &frame);
2265
2266 dev_kfree_skb(frame.skb);
2267
2268 return ret;
2269 }
2270
2271 static int cw1200_upload_null(struct cw1200_common *priv)
2272 {
2273 int ret = 0;
2274 struct wsm_template_frame frame = {
2275 .frame_type = WSM_FRAME_TYPE_NULL,
2276 .rate = 0xFF,
2277 };
2278
2279 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
2280 if (!frame.skb)
2281 return -ENOMEM;
2282
2283 ret = wsm_set_template_frame(priv, &frame);
2284
2285 dev_kfree_skb(frame.skb);
2286
2287 return ret;
2288 }
2289
2290 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2291 {
2292 /* TODO: This needs to be implemented
2293
2294 struct wsm_template_frame frame = {
2295 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2296 .rate = 0xFF,
2297 };
2298
2299 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2300 if (!frame.skb)
2301 return -ENOMEM;
2302
2303 ret = wsm_set_template_frame(priv, &frame);
2304
2305 dev_kfree_skb(frame.skb);
2306
2307 */
2308 return 0;
2309 }
2310
2311 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2312 bool enable)
2313 {
2314 struct wsm_beacon_transmit transmit = {
2315 .enable_beaconing = enable,
2316 };
2317
2318 return wsm_beacon_transmit(priv, &transmit);
2319 }
2320
2321 static int cw1200_start_ap(struct cw1200_common *priv)
2322 {
2323 int ret;
2324 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2325 struct wsm_start start = {
2326 .mode = priv->vif->p2p ?
2327 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2328 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
2329 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2330 .channel_number = priv->channel->hw_value,
2331 .beacon_interval = conf->beacon_int,
2332 .dtim_period = conf->dtim_period,
2333 .preamble = conf->use_short_preamble ?
2334 WSM_JOIN_PREAMBLE_SHORT :
2335 WSM_JOIN_PREAMBLE_LONG,
2336 .probe_delay = 100,
2337 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2338 conf->basic_rates),
2339 };
2340 struct wsm_operational_mode mode = {
2341 .power_mode = cw1200_power_mode,
2342 .disable_more_flag_usage = true,
2343 };
2344
2345 memset(start.ssid, 0, sizeof(start.ssid));
2346 if (!conf->hidden_ssid) {
2347 start.ssid_len = conf->ssid_len;
2348 memcpy(start.ssid, conf->ssid, start.ssid_len);
2349 }
2350
2351 priv->beacon_int = conf->beacon_int;
2352 priv->join_dtim_period = conf->dtim_period;
2353
2354 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2355
2356 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2357 start.channel_number, start.band,
2358 start.beacon_interval, start.dtim_period,
2359 start.basic_rate_set,
2360 start.ssid_len, start.ssid);
2361 ret = wsm_start(priv, &start);
2362 if (!ret)
2363 ret = cw1200_upload_keys(priv);
2364 if (!ret && priv->vif->p2p) {
2365 pr_debug("[AP] Setting p2p powersave configuration.\n");
2366 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2367 }
2368 if (!ret) {
2369 wsm_set_block_ack_policy(priv, 0, 0);
2370 priv->join_status = CW1200_JOIN_STATUS_AP;
2371 cw1200_update_filtering(priv);
2372 }
2373 wsm_set_operational_mode(priv, &mode);
2374 return ret;
2375 }
2376
2377 static int cw1200_update_beaconing(struct cw1200_common *priv)
2378 {
2379 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2380 struct wsm_reset reset = {
2381 .link_id = 0,
2382 .reset_statistics = true,
2383 };
2384
2385 if (priv->mode == NL80211_IFTYPE_AP) {
2386 /* TODO: check if changed channel, band */
2387 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2388 priv->beacon_int != conf->beacon_int) {
2389 pr_debug("ap restarting\n");
2390 wsm_lock_tx(priv);
2391 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2392 wsm_reset(priv, &reset);
2393 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2394 cw1200_start_ap(priv);
2395 wsm_unlock_tx(priv);
2396 } else
2397 pr_debug("ap started join_status: %d\n",
2398 priv->join_status);
2399 }
2400 return 0;
2401 }
Linux with added FPC-III support