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Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes
[deliverable/linux.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 /* When acting as p2p client being connected to p2p GO, in order to
487 * receive frames from a different p2p device, turn off bssid filter.
488 *
489 * WARNING: FW dependency!
490 * This can only be used with FW WSM371 and its successors.
491 * In that FW version even with bssid filter turned off,
492 * device will block most of the unwanted frames.
493 */
494 if (is_p2p)
495 bssid_filtering = false;
496
497 ret = wsm_set_rx_filter(priv, &priv->rx_filter);
498 if (!ret)
499 ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
500 if (!ret)
501 ret = wsm_beacon_filter_control(priv, &bf_ctrl);
502 if (!ret)
503 ret = wsm_set_bssid_filtering(priv, bssid_filtering);
504 if (!ret)
505 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
506 if (ret)
507 wiphy_err(priv->hw->wiphy,
508 "Update filtering failed: %d.\n", ret);
509 return;
510 }
511
512 void cw1200_update_filtering_work(struct work_struct *work)
513 {
514 struct cw1200_common *priv =
515 container_of(work, struct cw1200_common,
516 update_filtering_work);
517
518 cw1200_update_filtering(priv);
519 }
520
521 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
522 {
523 struct cw1200_common *priv =
524 container_of(work, struct cw1200_common,
525 set_beacon_wakeup_period_work);
526
527 wsm_set_beacon_wakeup_period(priv,
528 priv->beacon_int * priv->join_dtim_period >
529 MAX_BEACON_SKIP_TIME_MS ? 1 :
530 priv->join_dtim_period, 0);
531 }
532
533 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
534 struct netdev_hw_addr_list *mc_list)
535 {
536 static u8 broadcast_ipv6[ETH_ALEN] = {
537 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
538 };
539 static u8 broadcast_ipv4[ETH_ALEN] = {
540 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
541 };
542 struct cw1200_common *priv = hw->priv;
543 struct netdev_hw_addr *ha;
544 int count = 0;
545
546 /* Disable multicast filtering */
547 priv->has_multicast_subscription = false;
548 memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
549
550 if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
551 return 0;
552
553 /* Enable if requested */
554 netdev_hw_addr_list_for_each(ha, mc_list) {
555 pr_debug("[STA] multicast: %pM\n", ha->addr);
556 memcpy(&priv->multicast_filter.macaddrs[count],
557 ha->addr, ETH_ALEN);
558 if (memcmp(ha->addr, broadcast_ipv4, ETH_ALEN) &&
559 memcmp(ha->addr, broadcast_ipv6, ETH_ALEN))
560 priv->has_multicast_subscription = true;
561 count++;
562 }
563
564 if (count) {
565 priv->multicast_filter.enable = __cpu_to_le32(1);
566 priv->multicast_filter.num_addrs = __cpu_to_le32(count);
567 }
568
569 return netdev_hw_addr_list_count(mc_list);
570 }
571
572 void cw1200_configure_filter(struct ieee80211_hw *dev,
573 unsigned int changed_flags,
574 unsigned int *total_flags,
575 u64 multicast)
576 {
577 struct cw1200_common *priv = dev->priv;
578 bool listening = !!(*total_flags &
579 (FIF_PROMISC_IN_BSS |
580 FIF_OTHER_BSS |
581 FIF_BCN_PRBRESP_PROMISC |
582 FIF_PROBE_REQ));
583
584 *total_flags &= FIF_PROMISC_IN_BSS |
585 FIF_OTHER_BSS |
586 FIF_FCSFAIL |
587 FIF_BCN_PRBRESP_PROMISC |
588 FIF_PROBE_REQ;
589
590 down(&priv->scan.lock);
591 mutex_lock(&priv->conf_mutex);
592
593 priv->rx_filter.promiscuous = (*total_flags & FIF_PROMISC_IN_BSS)
594 ? 1 : 0;
595 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
596 FIF_PROBE_REQ)) ? 1 : 0;
597 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
598 priv->disable_beacon_filter = !(*total_flags &
599 (FIF_BCN_PRBRESP_PROMISC |
600 FIF_PROMISC_IN_BSS |
601 FIF_PROBE_REQ));
602 if (priv->listening != listening) {
603 priv->listening = listening;
604 wsm_lock_tx(priv);
605 cw1200_update_listening(priv, listening);
606 wsm_unlock_tx(priv);
607 }
608 cw1200_update_filtering(priv);
609 mutex_unlock(&priv->conf_mutex);
610 up(&priv->scan.lock);
611 }
612
613 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
614 u16 queue, const struct ieee80211_tx_queue_params *params)
615 {
616 struct cw1200_common *priv = dev->priv;
617 int ret = 0;
618 /* To prevent re-applying PM request OID again and again*/
619 bool old_uapsd_flags;
620
621 mutex_lock(&priv->conf_mutex);
622
623 if (queue < dev->queues) {
624 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
625
626 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
627 ret = wsm_set_tx_queue_params(priv,
628 &priv->tx_queue_params.params[queue], queue);
629 if (ret) {
630 ret = -EINVAL;
631 goto out;
632 }
633
634 WSM_EDCA_SET(&priv->edca, queue, params->aifs,
635 params->cw_min, params->cw_max,
636 params->txop, 0xc8,
637 params->uapsd);
638 ret = wsm_set_edca_params(priv, &priv->edca);
639 if (ret) {
640 ret = -EINVAL;
641 goto out;
642 }
643
644 if (priv->mode == NL80211_IFTYPE_STATION) {
645 ret = cw1200_set_uapsd_param(priv, &priv->edca);
646 if (!ret && priv->setbssparams_done &&
647 (priv->join_status == CW1200_JOIN_STATUS_STA) &&
648 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
649 ret = cw1200_set_pm(priv, &priv->powersave_mode);
650 }
651 } else {
652 ret = -EINVAL;
653 }
654
655 out:
656 mutex_unlock(&priv->conf_mutex);
657 return ret;
658 }
659
660 int cw1200_get_stats(struct ieee80211_hw *dev,
661 struct ieee80211_low_level_stats *stats)
662 {
663 struct cw1200_common *priv = dev->priv;
664
665 memcpy(stats, &priv->stats, sizeof(*stats));
666 return 0;
667 }
668
669 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
670 {
671 struct wsm_set_pm pm = *arg;
672
673 if (priv->uapsd_info.uapsd_flags != 0)
674 pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
675
676 if (memcmp(&pm, &priv->firmware_ps_mode,
677 sizeof(struct wsm_set_pm))) {
678 priv->firmware_ps_mode = pm;
679 return wsm_set_pm(priv, &pm);
680 } else {
681 return 0;
682 }
683 }
684
685 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
686 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
687 struct ieee80211_key_conf *key)
688 {
689 int ret = -EOPNOTSUPP;
690 struct cw1200_common *priv = dev->priv;
691 struct ieee80211_key_seq seq;
692
693 mutex_lock(&priv->conf_mutex);
694
695 if (cmd == SET_KEY) {
696 u8 *peer_addr = NULL;
697 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
698 1 : 0;
699 int idx = cw1200_alloc_key(priv);
700 struct wsm_add_key *wsm_key = &priv->keys[idx];
701
702 if (idx < 0) {
703 ret = -EINVAL;
704 goto finally;
705 }
706
707 if (sta)
708 peer_addr = sta->addr;
709
710 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
711
712 switch (key->cipher) {
713 case WLAN_CIPHER_SUITE_WEP40:
714 case WLAN_CIPHER_SUITE_WEP104:
715 if (key->keylen > 16) {
716 cw1200_free_key(priv, idx);
717 ret = -EINVAL;
718 goto finally;
719 }
720
721 if (pairwise) {
722 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
723 memcpy(wsm_key->wep_pairwise.peer,
724 peer_addr, ETH_ALEN);
725 memcpy(wsm_key->wep_pairwise.keydata,
726 &key->key[0], key->keylen);
727 wsm_key->wep_pairwise.keylen = key->keylen;
728 } else {
729 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
730 memcpy(wsm_key->wep_group.keydata,
731 &key->key[0], key->keylen);
732 wsm_key->wep_group.keylen = key->keylen;
733 wsm_key->wep_group.keyid = key->keyidx;
734 }
735 break;
736 case WLAN_CIPHER_SUITE_TKIP:
737 ieee80211_get_key_rx_seq(key, 0, &seq);
738 if (pairwise) {
739 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
740 memcpy(wsm_key->tkip_pairwise.peer,
741 peer_addr, ETH_ALEN);
742 memcpy(wsm_key->tkip_pairwise.keydata,
743 &key->key[0], 16);
744 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
745 &key->key[16], 8);
746 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
747 &key->key[24], 8);
748 } else {
749 size_t mic_offset =
750 (priv->mode == NL80211_IFTYPE_AP) ?
751 16 : 24;
752 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
753 memcpy(wsm_key->tkip_group.keydata,
754 &key->key[0], 16);
755 memcpy(wsm_key->tkip_group.rx_mic_key,
756 &key->key[mic_offset], 8);
757
758 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
759 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
760 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
761 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
762 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
763 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
764 wsm_key->tkip_group.rx_seqnum[6] = 0;
765 wsm_key->tkip_group.rx_seqnum[7] = 0;
766
767 wsm_key->tkip_group.keyid = key->keyidx;
768 }
769 break;
770 case WLAN_CIPHER_SUITE_CCMP:
771 ieee80211_get_key_rx_seq(key, 0, &seq);
772 if (pairwise) {
773 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
774 memcpy(wsm_key->aes_pairwise.peer,
775 peer_addr, ETH_ALEN);
776 memcpy(wsm_key->aes_pairwise.keydata,
777 &key->key[0], 16);
778 } else {
779 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
780 memcpy(wsm_key->aes_group.keydata,
781 &key->key[0], 16);
782
783 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
784 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
785 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
786 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
787 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
788 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
789 wsm_key->aes_group.rx_seqnum[6] = 0;
790 wsm_key->aes_group.rx_seqnum[7] = 0;
791 wsm_key->aes_group.keyid = key->keyidx;
792 }
793 break;
794 case WLAN_CIPHER_SUITE_SMS4:
795 if (pairwise) {
796 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
797 memcpy(wsm_key->wapi_pairwise.peer,
798 peer_addr, ETH_ALEN);
799 memcpy(wsm_key->wapi_pairwise.keydata,
800 &key->key[0], 16);
801 memcpy(wsm_key->wapi_pairwise.mic_key,
802 &key->key[16], 16);
803 wsm_key->wapi_pairwise.keyid = key->keyidx;
804 } else {
805 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
806 memcpy(wsm_key->wapi_group.keydata,
807 &key->key[0], 16);
808 memcpy(wsm_key->wapi_group.mic_key,
809 &key->key[16], 16);
810 wsm_key->wapi_group.keyid = key->keyidx;
811 }
812 break;
813 default:
814 pr_warn("Unhandled key type %d\n", key->cipher);
815 cw1200_free_key(priv, idx);
816 ret = -EOPNOTSUPP;
817 goto finally;
818 }
819 ret = wsm_add_key(priv, wsm_key);
820 if (!ret)
821 key->hw_key_idx = idx;
822 else
823 cw1200_free_key(priv, idx);
824 } else if (cmd == DISABLE_KEY) {
825 struct wsm_remove_key wsm_key = {
826 .index = key->hw_key_idx,
827 };
828
829 if (wsm_key.index > WSM_KEY_MAX_INDEX) {
830 ret = -EINVAL;
831 goto finally;
832 }
833
834 cw1200_free_key(priv, wsm_key.index);
835 ret = wsm_remove_key(priv, &wsm_key);
836 } else {
837 pr_warn("Unhandled key command %d\n", cmd);
838 }
839
840 finally:
841 mutex_unlock(&priv->conf_mutex);
842 return ret;
843 }
844
845 void cw1200_wep_key_work(struct work_struct *work)
846 {
847 struct cw1200_common *priv =
848 container_of(work, struct cw1200_common, wep_key_work);
849 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
850 struct cw1200_queue *queue = &priv->tx_queue[queue_id];
851 __le32 wep_default_key_id = __cpu_to_le32(
852 priv->wep_default_key_id);
853
854 pr_debug("[STA] Setting default WEP key: %d\n",
855 priv->wep_default_key_id);
856 wsm_flush_tx(priv);
857 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
858 &wep_default_key_id, sizeof(wep_default_key_id));
859 cw1200_queue_requeue(queue, priv->pending_frame_id);
860 wsm_unlock_tx(priv);
861 }
862
863 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
864 {
865 int ret = 0;
866 __le32 val32;
867 struct cw1200_common *priv = hw->priv;
868
869 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
870 return 0;
871
872 if (value != (u32) -1)
873 val32 = __cpu_to_le32(value);
874 else
875 val32 = 0; /* disabled */
876
877 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
878 /* device is down, can _not_ set threshold */
879 ret = -ENODEV;
880 goto out;
881 }
882
883 if (priv->rts_threshold == value)
884 goto out;
885
886 pr_debug("[STA] Setting RTS threshold: %d\n",
887 priv->rts_threshold);
888
889 /* mutex_lock(&priv->conf_mutex); */
890 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
891 &val32, sizeof(val32));
892 if (!ret)
893 priv->rts_threshold = value;
894 /* mutex_unlock(&priv->conf_mutex); */
895
896 out:
897 return ret;
898 }
899
900 /* If successful, LOCKS the TX queue! */
901 static int __cw1200_flush(struct cw1200_common *priv, bool drop)
902 {
903 int i, ret;
904
905 for (;;) {
906 /* TODO: correct flush handling is required when dev_stop.
907 * Temporary workaround: 2s
908 */
909 if (drop) {
910 for (i = 0; i < 4; ++i)
911 cw1200_queue_clear(&priv->tx_queue[i]);
912 } else {
913 ret = wait_event_timeout(
914 priv->tx_queue_stats.wait_link_id_empty,
915 cw1200_queue_stats_is_empty(
916 &priv->tx_queue_stats, -1),
917 2 * HZ);
918 }
919
920 if (!drop && ret <= 0) {
921 ret = -ETIMEDOUT;
922 break;
923 } else {
924 ret = 0;
925 }
926
927 wsm_lock_tx(priv);
928 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
929 /* Highly unlikely: WSM requeued frames. */
930 wsm_unlock_tx(priv);
931 continue;
932 }
933 break;
934 }
935 return ret;
936 }
937
938 void cw1200_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
939 {
940 struct cw1200_common *priv = hw->priv;
941
942 switch (priv->mode) {
943 case NL80211_IFTYPE_MONITOR:
944 drop = true;
945 break;
946 case NL80211_IFTYPE_AP:
947 if (!priv->enable_beacon)
948 drop = true;
949 break;
950 }
951
952 if (!__cw1200_flush(priv, drop))
953 wsm_unlock_tx(priv);
954
955 return;
956 }
957
958 /* ******************************************************************** */
959 /* WSM callbacks */
960
961 void cw1200_free_event_queue(struct cw1200_common *priv)
962 {
963 LIST_HEAD(list);
964
965 spin_lock(&priv->event_queue_lock);
966 list_splice_init(&priv->event_queue, &list);
967 spin_unlock(&priv->event_queue_lock);
968
969 __cw1200_free_event_queue(&list);
970 }
971
972 void cw1200_event_handler(struct work_struct *work)
973 {
974 struct cw1200_common *priv =
975 container_of(work, struct cw1200_common, event_handler);
976 struct cw1200_wsm_event *event;
977 LIST_HEAD(list);
978
979 spin_lock(&priv->event_queue_lock);
980 list_splice_init(&priv->event_queue, &list);
981 spin_unlock(&priv->event_queue_lock);
982
983 list_for_each_entry(event, &list, link) {
984 switch (event->evt.id) {
985 case WSM_EVENT_ERROR:
986 pr_err("Unhandled WSM Error from LMAC\n");
987 break;
988 case WSM_EVENT_BSS_LOST:
989 pr_debug("[CQM] BSS lost.\n");
990 cancel_work_sync(&priv->unjoin_work);
991 if (!down_trylock(&priv->scan.lock)) {
992 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
993 up(&priv->scan.lock);
994 } else {
995 /* Scan is in progress. Delay reporting.
996 * Scan complete will trigger bss_loss_work
997 */
998 priv->delayed_link_loss = 1;
999 /* Also start a watchdog. */
1000 queue_delayed_work(priv->workqueue,
1001 &priv->bss_loss_work, 5*HZ);
1002 }
1003 break;
1004 case WSM_EVENT_BSS_REGAINED:
1005 pr_debug("[CQM] BSS regained.\n");
1006 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1007 cancel_work_sync(&priv->unjoin_work);
1008 break;
1009 case WSM_EVENT_RADAR_DETECTED:
1010 wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1011 break;
1012 case WSM_EVENT_RCPI_RSSI:
1013 {
1014 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1015 * RSSI = RCPI / 2 - 110
1016 */
1017 int rcpi_rssi = (int)(event->evt.data & 0xFF);
1018 int cqm_evt;
1019 if (priv->cqm_use_rssi)
1020 rcpi_rssi = (s8)rcpi_rssi;
1021 else
1022 rcpi_rssi = rcpi_rssi / 2 - 110;
1023
1024 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1025 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1026 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1027 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1028 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
1029 GFP_KERNEL);
1030 break;
1031 }
1032 case WSM_EVENT_BT_INACTIVE:
1033 pr_warn("Unhandled BT INACTIVE from LMAC\n");
1034 break;
1035 case WSM_EVENT_BT_ACTIVE:
1036 pr_warn("Unhandled BT ACTIVE from LMAC\n");
1037 break;
1038 }
1039 }
1040 __cw1200_free_event_queue(&list);
1041 }
1042
1043 void cw1200_bss_loss_work(struct work_struct *work)
1044 {
1045 struct cw1200_common *priv =
1046 container_of(work, struct cw1200_common, bss_loss_work.work);
1047
1048 pr_debug("[CQM] Reporting connection loss.\n");
1049 wsm_lock_tx(priv);
1050 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1051 wsm_unlock_tx(priv);
1052 }
1053
1054 void cw1200_bss_params_work(struct work_struct *work)
1055 {
1056 struct cw1200_common *priv =
1057 container_of(work, struct cw1200_common, bss_params_work);
1058 mutex_lock(&priv->conf_mutex);
1059
1060 priv->bss_params.reset_beacon_loss = 1;
1061 wsm_set_bss_params(priv, &priv->bss_params);
1062 priv->bss_params.reset_beacon_loss = 0;
1063
1064 mutex_unlock(&priv->conf_mutex);
1065 }
1066
1067 /* ******************************************************************** */
1068 /* Internal API */
1069
1070 /* This function is called to Parse the SDD file
1071 * to extract listen_interval and PTA related information
1072 * sdd is a TLV: u8 id, u8 len, u8 data[]
1073 */
1074 static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1075 {
1076 const u8 *p = priv->sdd->data;
1077 int ret = 0;
1078
1079 while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1080 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1081 pr_warn("Malformed sdd structure\n");
1082 return -1;
1083 }
1084 switch (p[0]) {
1085 case SDD_PTA_CFG_ELT_ID: {
1086 u16 v;
1087 if (p[1] < 4) {
1088 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1089 ret = -1;
1090 break;
1091 }
1092 v = le16_to_cpu(*((__le16 *)(p + 2)));
1093 if (!v) /* non-zero means this is enabled */
1094 break;
1095
1096 v = le16_to_cpu(*((__le16 *)(p + 4)));
1097 priv->conf_listen_interval = (v >> 7) & 0x1F;
1098 pr_debug("PTA found; Listen Interval %d\n",
1099 priv->conf_listen_interval);
1100 break;
1101 }
1102 case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1103 u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1104 if (clk != priv->hw_refclk)
1105 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1106 clk, priv->hw_refclk);
1107 break;
1108 }
1109 default:
1110 break;
1111 }
1112 p += p[1] + 2;
1113 }
1114
1115 if (!priv->bt_present) {
1116 pr_debug("PTA element NOT found.\n");
1117 priv->conf_listen_interval = 0;
1118 }
1119 return ret;
1120 }
1121
1122 int cw1200_setup_mac(struct cw1200_common *priv)
1123 {
1124 int ret = 0;
1125
1126 /* NOTE: There is a bug in FW: it reports signal
1127 * as RSSI if RSSI subscription is enabled.
1128 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1129 *
1130 * NOTE2: RSSI based reports have been switched to RCPI, since
1131 * FW has a bug and RSSI reported values are not stable,
1132 * what can leads to signal level oscilations in user-end applications
1133 */
1134 struct wsm_rcpi_rssi_threshold threshold = {
1135 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1136 WSM_RCPI_RSSI_DONT_USE_UPPER |
1137 WSM_RCPI_RSSI_DONT_USE_LOWER,
1138 .rollingAverageCount = 16,
1139 };
1140
1141 struct wsm_configuration cfg = {
1142 .dot11StationId = &priv->mac_addr[0],
1143 };
1144
1145 /* Remember the decission here to make sure, we will handle
1146 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1147 */
1148 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1149 priv->cqm_use_rssi = true;
1150
1151 if (!priv->sdd) {
1152 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1153 if (ret) {
1154 pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1155 return ret;
1156 }
1157 cw1200_parse_sdd_file(priv);
1158 }
1159
1160 cfg.dpdData = priv->sdd->data;
1161 cfg.dpdData_size = priv->sdd->size;
1162 ret = wsm_configuration(priv, &cfg);
1163 if (ret)
1164 return ret;
1165
1166 /* Configure RSSI/SCPI reporting as RSSI. */
1167 wsm_set_rcpi_rssi_threshold(priv, &threshold);
1168
1169 return 0;
1170 }
1171
1172 static void cw1200_join_complete(struct cw1200_common *priv)
1173 {
1174 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1175
1176 priv->join_pending = false;
1177 if (priv->join_complete_status) {
1178 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1179 cw1200_update_listening(priv, priv->listening);
1180 cw1200_do_unjoin(priv);
1181 ieee80211_connection_loss(priv->vif);
1182 } else {
1183 if (priv->mode == NL80211_IFTYPE_ADHOC)
1184 priv->join_status = CW1200_JOIN_STATUS_IBSS;
1185 else
1186 priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1187 }
1188 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1189 }
1190
1191 void cw1200_join_complete_work(struct work_struct *work)
1192 {
1193 struct cw1200_common *priv =
1194 container_of(work, struct cw1200_common, join_complete_work);
1195 mutex_lock(&priv->conf_mutex);
1196 cw1200_join_complete(priv);
1197 mutex_unlock(&priv->conf_mutex);
1198 }
1199
1200 void cw1200_join_complete_cb(struct cw1200_common *priv,
1201 struct wsm_join_complete *arg)
1202 {
1203 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1204 arg->status);
1205
1206 if (cancel_delayed_work(&priv->join_timeout)) {
1207 priv->join_complete_status = arg->status;
1208 queue_work(priv->workqueue, &priv->join_complete_work);
1209 }
1210 }
1211
1212 /* MUST be called with tx_lock held! It will be unlocked for us. */
1213 static void cw1200_do_join(struct cw1200_common *priv)
1214 {
1215 const u8 *bssid;
1216 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1217 struct cfg80211_bss *bss = NULL;
1218 struct wsm_protected_mgmt_policy mgmt_policy;
1219 struct wsm_join join = {
1220 .mode = conf->ibss_joined ?
1221 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1222 .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1223 .probe_for_join = 1,
1224 .atim_window = 0,
1225 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1226 conf->basic_rates),
1227 };
1228 if (delayed_work_pending(&priv->join_timeout)) {
1229 pr_warn("[STA] - Join request already pending, skipping..\n");
1230 wsm_unlock_tx(priv);
1231 return;
1232 }
1233
1234 if (priv->join_status)
1235 cw1200_do_unjoin(priv);
1236
1237 bssid = priv->vif->bss_conf.bssid;
1238
1239 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel,
1240 bssid, NULL, 0, 0, 0);
1241
1242 if (!bss && !conf->ibss_joined) {
1243 wsm_unlock_tx(priv);
1244 return;
1245 }
1246
1247 mutex_lock(&priv->conf_mutex);
1248
1249 /* Under the conf lock: check scan status and
1250 * bail out if it is in progress.
1251 */
1252 if (atomic_read(&priv->scan.in_progress)) {
1253 wsm_unlock_tx(priv);
1254 goto done_put;
1255 }
1256
1257 priv->join_pending = true;
1258
1259 /* Sanity check basic rates */
1260 if (!join.basic_rate_set)
1261 join.basic_rate_set = 7;
1262
1263 /* Sanity check beacon interval */
1264 if (!priv->beacon_int)
1265 priv->beacon_int = 1;
1266
1267 join.beacon_interval = priv->beacon_int;
1268
1269 /* BT Coex related changes */
1270 if (priv->bt_present) {
1271 if (((priv->conf_listen_interval * 100) %
1272 priv->beacon_int) == 0)
1273 priv->listen_interval =
1274 ((priv->conf_listen_interval * 100) /
1275 priv->beacon_int);
1276 else
1277 priv->listen_interval =
1278 ((priv->conf_listen_interval * 100) /
1279 priv->beacon_int + 1);
1280 }
1281
1282 if (priv->hw->conf.ps_dtim_period)
1283 priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1284 join.dtim_period = priv->join_dtim_period;
1285
1286 join.channel_number = priv->channel->hw_value;
1287 join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
1288 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1289
1290 memcpy(join.bssid, bssid, sizeof(join.bssid));
1291
1292 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1293 join.bssid,
1294 join.dtim_period, priv->beacon_int);
1295
1296 if (!conf->ibss_joined) {
1297 const u8 *ssidie;
1298 rcu_read_lock();
1299 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1300 if (ssidie) {
1301 join.ssid_len = ssidie[1];
1302 memcpy(join.ssid, &ssidie[2], join.ssid_len);
1303 }
1304 rcu_read_unlock();
1305 }
1306
1307 if (priv->vif->p2p) {
1308 join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1309 join.basic_rate_set =
1310 cw1200_rate_mask_to_wsm(priv, 0xFF0);
1311 }
1312
1313 /* Enable asynchronous join calls */
1314 if (!conf->ibss_joined) {
1315 join.flags |= WSM_JOIN_FLAGS_FORCE;
1316 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1317 }
1318
1319 wsm_flush_tx(priv);
1320
1321 /* Stay Awake for Join and Auth Timeouts and a bit more */
1322 cw1200_pm_stay_awake(&priv->pm_state,
1323 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1324
1325 cw1200_update_listening(priv, false);
1326
1327 /* Turn on Block ACKs */
1328 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1329 priv->ba_rx_tid_mask);
1330
1331 /* Set up timeout */
1332 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1333 priv->join_status = CW1200_JOIN_STATUS_JOINING;
1334 queue_delayed_work(priv->workqueue,
1335 &priv->join_timeout,
1336 CW1200_JOIN_TIMEOUT);
1337 }
1338
1339 /* 802.11w protected mgmt frames */
1340 mgmt_policy.protectedMgmtEnable = 0;
1341 mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1342 mgmt_policy.encryptionForAuthFrame = 1;
1343 wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1344
1345 /* Perform actual join */
1346 if (wsm_join(priv, &join)) {
1347 pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1348 cancel_delayed_work_sync(&priv->join_timeout);
1349 cw1200_update_listening(priv, priv->listening);
1350 /* Tx lock still held, unjoin will clear it. */
1351 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1352 wsm_unlock_tx(priv);
1353 } else {
1354 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1355 cw1200_join_complete(priv); /* Will clear tx_lock */
1356
1357 /* Upload keys */
1358 cw1200_upload_keys(priv);
1359
1360 /* Due to beacon filtering it is possible that the
1361 * AP's beacon is not known for the mac80211 stack.
1362 * Disable filtering temporary to make sure the stack
1363 * receives at least one
1364 */
1365 priv->disable_beacon_filter = true;
1366 }
1367 cw1200_update_filtering(priv);
1368
1369 done_put:
1370 mutex_unlock(&priv->conf_mutex);
1371 if (bss)
1372 cfg80211_put_bss(priv->hw->wiphy, bss);
1373 }
1374
1375 void cw1200_join_timeout(struct work_struct *work)
1376 {
1377 struct cw1200_common *priv =
1378 container_of(work, struct cw1200_common, join_timeout.work);
1379 pr_debug("[WSM] Join timed out.\n");
1380 wsm_lock_tx(priv);
1381 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1382 wsm_unlock_tx(priv);
1383 }
1384
1385 static void cw1200_do_unjoin(struct cw1200_common *priv)
1386 {
1387 struct wsm_reset reset = {
1388 .reset_statistics = true,
1389 };
1390
1391 cancel_delayed_work_sync(&priv->join_timeout);
1392
1393 mutex_lock(&priv->conf_mutex);
1394 priv->join_pending = false;
1395
1396 if (atomic_read(&priv->scan.in_progress)) {
1397 if (priv->delayed_unjoin)
1398 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1399 else
1400 priv->delayed_unjoin = true;
1401 goto done;
1402 }
1403
1404 priv->delayed_link_loss = false;
1405
1406 if (!priv->join_status)
1407 goto done;
1408
1409 if (priv->join_status == CW1200_JOIN_STATUS_AP)
1410 goto done;
1411
1412 cancel_work_sync(&priv->update_filtering_work);
1413 cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1414 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1415
1416 /* Unjoin is a reset. */
1417 wsm_flush_tx(priv);
1418 wsm_keep_alive_period(priv, 0);
1419 wsm_reset(priv, &reset);
1420 wsm_set_output_power(priv, priv->output_power * 10);
1421 priv->join_dtim_period = 0;
1422 cw1200_setup_mac(priv);
1423 cw1200_free_event_queue(priv);
1424 cancel_work_sync(&priv->event_handler);
1425 cw1200_update_listening(priv, priv->listening);
1426 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1427
1428 /* Disable Block ACKs */
1429 wsm_set_block_ack_policy(priv, 0, 0);
1430
1431 priv->disable_beacon_filter = false;
1432 cw1200_update_filtering(priv);
1433 memset(&priv->association_mode, 0,
1434 sizeof(priv->association_mode));
1435 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1436 priv->setbssparams_done = false;
1437 memset(&priv->firmware_ps_mode, 0,
1438 sizeof(priv->firmware_ps_mode));
1439
1440 pr_debug("[STA] Unjoin completed.\n");
1441
1442 done:
1443 mutex_unlock(&priv->conf_mutex);
1444 }
1445
1446 void cw1200_unjoin_work(struct work_struct *work)
1447 {
1448 struct cw1200_common *priv =
1449 container_of(work, struct cw1200_common, unjoin_work);
1450
1451 cw1200_do_unjoin(priv);
1452
1453 /* Tell the stack we're dead */
1454 ieee80211_connection_loss(priv->vif);
1455
1456 wsm_unlock_tx(priv);
1457 }
1458
1459 int cw1200_enable_listening(struct cw1200_common *priv)
1460 {
1461 struct wsm_start start = {
1462 .mode = WSM_START_MODE_P2P_DEV,
1463 .band = WSM_PHY_BAND_2_4G,
1464 .beacon_interval = 100,
1465 .dtim_period = 1,
1466 .probe_delay = 0,
1467 .basic_rate_set = 0x0F,
1468 };
1469
1470 if (priv->channel) {
1471 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
1472 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1473 start.channel_number = priv->channel->hw_value;
1474 } else {
1475 start.band = WSM_PHY_BAND_2_4G;
1476 start.channel_number = 1;
1477 }
1478
1479 return wsm_start(priv, &start);
1480 }
1481
1482 int cw1200_disable_listening(struct cw1200_common *priv)
1483 {
1484 int ret;
1485 struct wsm_reset reset = {
1486 .reset_statistics = true,
1487 };
1488 ret = wsm_reset(priv, &reset);
1489 return ret;
1490 }
1491
1492 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1493 {
1494 if (enabled) {
1495 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1496 if (!cw1200_enable_listening(priv))
1497 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1498 wsm_set_probe_responder(priv, true);
1499 }
1500 } else {
1501 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1502 if (!cw1200_disable_listening(priv))
1503 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1504 wsm_set_probe_responder(priv, false);
1505 }
1506 }
1507 }
1508
1509 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1510 const struct wsm_edca_params *arg)
1511 {
1512 int ret;
1513 u16 uapsd_flags = 0;
1514
1515 /* Here's the mapping AC [queue, bit]
1516 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1517 */
1518
1519 if (arg->uapsd_enable[0])
1520 uapsd_flags |= 1 << 3;
1521
1522 if (arg->uapsd_enable[1])
1523 uapsd_flags |= 1 << 2;
1524
1525 if (arg->uapsd_enable[2])
1526 uapsd_flags |= 1 << 1;
1527
1528 if (arg->uapsd_enable[3])
1529 uapsd_flags |= 1;
1530
1531 /* Currently pseudo U-APSD operation is not supported, so setting
1532 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1533 * AutoTriggerStep to 0
1534 */
1535
1536 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1537 priv->uapsd_info.min_auto_trigger_interval = 0;
1538 priv->uapsd_info.max_auto_trigger_interval = 0;
1539 priv->uapsd_info.auto_trigger_step = 0;
1540
1541 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1542 return ret;
1543 }
1544
1545 /* ******************************************************************** */
1546 /* AP API */
1547
1548 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1549 struct ieee80211_sta *sta)
1550 {
1551 struct cw1200_common *priv = hw->priv;
1552 struct cw1200_sta_priv *sta_priv =
1553 (struct cw1200_sta_priv *)&sta->drv_priv;
1554 struct cw1200_link_entry *entry;
1555 struct sk_buff *skb;
1556
1557 if (priv->mode != NL80211_IFTYPE_AP)
1558 return 0;
1559
1560 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1561 if (WARN_ON(!sta_priv->link_id)) {
1562 wiphy_info(priv->hw->wiphy,
1563 "[AP] No more link IDs available.\n");
1564 return -ENOENT;
1565 }
1566
1567 entry = &priv->link_id_db[sta_priv->link_id - 1];
1568 spin_lock_bh(&priv->ps_state_lock);
1569 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1570 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1571 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1572 entry->status = CW1200_LINK_HARD;
1573 while ((skb = skb_dequeue(&entry->rx_queue)))
1574 ieee80211_rx_irqsafe(priv->hw, skb);
1575 spin_unlock_bh(&priv->ps_state_lock);
1576 return 0;
1577 }
1578
1579 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1580 struct ieee80211_sta *sta)
1581 {
1582 struct cw1200_common *priv = hw->priv;
1583 struct cw1200_sta_priv *sta_priv =
1584 (struct cw1200_sta_priv *)&sta->drv_priv;
1585 struct cw1200_link_entry *entry;
1586
1587 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1588 return 0;
1589
1590 entry = &priv->link_id_db[sta_priv->link_id - 1];
1591 spin_lock_bh(&priv->ps_state_lock);
1592 entry->status = CW1200_LINK_RESERVE;
1593 entry->timestamp = jiffies;
1594 wsm_lock_tx_async(priv);
1595 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1596 wsm_unlock_tx(priv);
1597 spin_unlock_bh(&priv->ps_state_lock);
1598 flush_workqueue(priv->workqueue);
1599 return 0;
1600 }
1601
1602 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1603 struct ieee80211_vif *vif,
1604 enum sta_notify_cmd notify_cmd,
1605 int link_id)
1606 {
1607 struct cw1200_common *priv = dev->priv;
1608 u32 bit, prev;
1609
1610 /* Zero link id means "for all link IDs" */
1611 if (link_id)
1612 bit = BIT(link_id);
1613 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1614 bit = 0;
1615 else
1616 bit = priv->link_id_map;
1617 prev = priv->sta_asleep_mask & bit;
1618
1619 switch (notify_cmd) {
1620 case STA_NOTIFY_SLEEP:
1621 if (!prev) {
1622 if (priv->buffered_multicasts &&
1623 !priv->sta_asleep_mask)
1624 queue_work(priv->workqueue,
1625 &priv->multicast_start_work);
1626 priv->sta_asleep_mask |= bit;
1627 }
1628 break;
1629 case STA_NOTIFY_AWAKE:
1630 if (prev) {
1631 priv->sta_asleep_mask &= ~bit;
1632 priv->pspoll_mask &= ~bit;
1633 if (priv->tx_multicast && link_id &&
1634 !priv->sta_asleep_mask)
1635 queue_work(priv->workqueue,
1636 &priv->multicast_stop_work);
1637 cw1200_bh_wakeup(priv);
1638 }
1639 break;
1640 }
1641 }
1642
1643 void cw1200_sta_notify(struct ieee80211_hw *dev,
1644 struct ieee80211_vif *vif,
1645 enum sta_notify_cmd notify_cmd,
1646 struct ieee80211_sta *sta)
1647 {
1648 struct cw1200_common *priv = dev->priv;
1649 struct cw1200_sta_priv *sta_priv =
1650 (struct cw1200_sta_priv *)&sta->drv_priv;
1651
1652 spin_lock_bh(&priv->ps_state_lock);
1653 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1654 spin_unlock_bh(&priv->ps_state_lock);
1655 }
1656
1657 static void cw1200_ps_notify(struct cw1200_common *priv,
1658 int link_id, bool ps)
1659 {
1660 if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1661 return;
1662
1663 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1664 ps ? "Stop" : "Start",
1665 link_id, priv->sta_asleep_mask);
1666
1667 __cw1200_sta_notify(priv->hw, priv->vif,
1668 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1669 }
1670
1671 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1672 {
1673 struct sk_buff *skb;
1674 struct wsm_update_ie update_ie = {
1675 .what = WSM_UPDATE_IE_BEACON,
1676 .count = 1,
1677 };
1678 u16 tim_offset, tim_length;
1679
1680 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1681
1682 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1683 &tim_offset, &tim_length);
1684 if (!skb) {
1685 if (!__cw1200_flush(priv, true))
1686 wsm_unlock_tx(priv);
1687 return -ENOENT;
1688 }
1689
1690 if (tim_offset && tim_length >= 6) {
1691 /* Ignore DTIM count from mac80211:
1692 * firmware handles DTIM internally.
1693 */
1694 skb->data[tim_offset + 2] = 0;
1695
1696 /* Set/reset aid0 bit */
1697 if (aid0_bit_set)
1698 skb->data[tim_offset + 4] |= 1;
1699 else
1700 skb->data[tim_offset + 4] &= ~1;
1701 }
1702
1703 update_ie.ies = &skb->data[tim_offset];
1704 update_ie.length = tim_length;
1705 wsm_update_ie(priv, &update_ie);
1706
1707 dev_kfree_skb(skb);
1708
1709 return 0;
1710 }
1711
1712 void cw1200_set_tim_work(struct work_struct *work)
1713 {
1714 struct cw1200_common *priv =
1715 container_of(work, struct cw1200_common, set_tim_work);
1716 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1717 }
1718
1719 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1720 bool set)
1721 {
1722 struct cw1200_common *priv = dev->priv;
1723 queue_work(priv->workqueue, &priv->set_tim_work);
1724 return 0;
1725 }
1726
1727 void cw1200_set_cts_work(struct work_struct *work)
1728 {
1729 struct cw1200_common *priv =
1730 container_of(work, struct cw1200_common, set_cts_work);
1731
1732 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1733 struct wsm_update_ie update_ie = {
1734 .what = WSM_UPDATE_IE_BEACON,
1735 .count = 1,
1736 .ies = erp_ie,
1737 .length = 3,
1738 };
1739 u32 erp_info;
1740 __le32 use_cts_prot;
1741 mutex_lock(&priv->conf_mutex);
1742 erp_info = priv->erp_info;
1743 mutex_unlock(&priv->conf_mutex);
1744 use_cts_prot =
1745 erp_info & WLAN_ERP_USE_PROTECTION ?
1746 __cpu_to_le32(1) : 0;
1747
1748 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1749
1750 pr_debug("[STA] ERP information 0x%x\n", erp_info);
1751
1752 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1753 &use_cts_prot, sizeof(use_cts_prot));
1754 wsm_update_ie(priv, &update_ie);
1755
1756 return;
1757 }
1758
1759 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1760 {
1761 struct wsm_override_internal_txrate arg;
1762 int ret = 0;
1763
1764 if (priv->mode == NL80211_IFTYPE_STATION) {
1765 /* Plumb PSPOLL and NULL template */
1766 cw1200_upload_pspoll(priv);
1767 cw1200_upload_null(priv);
1768 cw1200_upload_qosnull(priv);
1769 } else {
1770 return 0;
1771 }
1772
1773 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1774
1775 if (!priv->vif->p2p) {
1776 /* STATION mode */
1777 if (priv->bss_params.operational_rate_set & ~0xF) {
1778 pr_debug("[STA] STA has ERP rates\n");
1779 /* G or BG mode */
1780 arg.internalTxRate = (__ffs(
1781 priv->bss_params.operational_rate_set & ~0xF));
1782 } else {
1783 pr_debug("[STA] STA has non ERP rates\n");
1784 /* B only mode */
1785 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1786 }
1787 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1788 } else {
1789 /* P2P mode */
1790 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1791 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1792 }
1793
1794 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1795 priv->mode,
1796 arg.internalTxRate,
1797 arg.nonErpInternalTxRate);
1798
1799 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1800 &arg, sizeof(arg));
1801
1802 return ret;
1803 }
1804
1805 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1806 struct ieee80211_vif *vif,
1807 struct ieee80211_bss_conf *info,
1808 u32 changed)
1809 {
1810 struct cw1200_common *priv = dev->priv;
1811 bool do_join = false;
1812
1813 mutex_lock(&priv->conf_mutex);
1814
1815 pr_debug("BSS CHANGED: %08x\n", changed);
1816
1817 /* TODO: BSS_CHANGED_QOS */
1818 /* TODO: BSS_CHANGED_TXPOWER */
1819
1820 if (changed & BSS_CHANGED_ARP_FILTER) {
1821 struct wsm_mib_arp_ipv4_filter filter = {0};
1822 int i;
1823
1824 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1825 info->arp_addr_cnt);
1826
1827 /* Currently only one IP address is supported by firmware.
1828 * In case of more IPs arp filtering will be disabled.
1829 */
1830 if (info->arp_addr_cnt > 0 &&
1831 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1832 for (i = 0; i < info->arp_addr_cnt; i++) {
1833 filter.ipv4addrs[i] = info->arp_addr_list[i];
1834 pr_debug("[STA] addr[%d]: 0x%X\n",
1835 i, filter.ipv4addrs[i]);
1836 }
1837 filter.enable = __cpu_to_le32(1);
1838 }
1839
1840 pr_debug("[STA] arp ip filter enable: %d\n",
1841 __le32_to_cpu(filter.enable));
1842
1843 wsm_set_arp_ipv4_filter(priv, &filter);
1844 }
1845
1846 if (changed &
1847 (BSS_CHANGED_BEACON |
1848 BSS_CHANGED_AP_PROBE_RESP |
1849 BSS_CHANGED_BSSID |
1850 BSS_CHANGED_SSID |
1851 BSS_CHANGED_IBSS)) {
1852 pr_debug("BSS_CHANGED_BEACON\n");
1853 priv->beacon_int = info->beacon_int;
1854 cw1200_update_beaconing(priv);
1855 cw1200_upload_beacon(priv);
1856 }
1857
1858 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1859 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1860
1861 if (priv->enable_beacon != info->enable_beacon) {
1862 cw1200_enable_beaconing(priv, info->enable_beacon);
1863 priv->enable_beacon = info->enable_beacon;
1864 }
1865 }
1866
1867 if (changed & BSS_CHANGED_BEACON_INT) {
1868 pr_debug("CHANGED_BEACON_INT\n");
1869 if (info->ibss_joined)
1870 do_join = true;
1871 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1872 cw1200_update_beaconing(priv);
1873 }
1874
1875 /* assoc/disassoc, or maybe AID changed */
1876 if (changed & BSS_CHANGED_ASSOC) {
1877 wsm_lock_tx(priv);
1878 priv->wep_default_key_id = -1;
1879 wsm_unlock_tx(priv);
1880 }
1881
1882 if (changed & BSS_CHANGED_BSSID) {
1883 pr_debug("BSS_CHANGED_BSSID\n");
1884 do_join = true;
1885 }
1886
1887 if (changed &
1888 (BSS_CHANGED_ASSOC |
1889 BSS_CHANGED_BSSID |
1890 BSS_CHANGED_IBSS |
1891 BSS_CHANGED_BASIC_RATES |
1892 BSS_CHANGED_HT)) {
1893 pr_debug("BSS_CHANGED_ASSOC\n");
1894 if (info->assoc) {
1895 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1896 ieee80211_connection_loss(vif);
1897 mutex_unlock(&priv->conf_mutex);
1898 return;
1899 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1900 priv->join_status = CW1200_JOIN_STATUS_STA;
1901 }
1902 } else {
1903 do_join = true;
1904 }
1905
1906 if (info->assoc || info->ibss_joined) {
1907 struct ieee80211_sta *sta = NULL;
1908 __le32 htprot = 0;
1909
1910 if (info->dtim_period)
1911 priv->join_dtim_period = info->dtim_period;
1912 priv->beacon_int = info->beacon_int;
1913
1914 rcu_read_lock();
1915
1916 if (info->bssid && !info->ibss_joined)
1917 sta = ieee80211_find_sta(vif, info->bssid);
1918 if (sta) {
1919 priv->ht_info.ht_cap = sta->ht_cap;
1920 priv->bss_params.operational_rate_set =
1921 cw1200_rate_mask_to_wsm(priv,
1922 sta->supp_rates[priv->channel->band]);
1923 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1924 priv->ht_info.operation_mode = info->ht_operation_mode;
1925 } else {
1926 memset(&priv->ht_info, 0,
1927 sizeof(priv->ht_info));
1928 priv->bss_params.operational_rate_set = -1;
1929 }
1930 rcu_read_unlock();
1931
1932 /* Non Greenfield stations present */
1933 if (priv->ht_info.operation_mode &
1934 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1935 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1936
1937 /* Set HT protection method */
1938 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1939
1940 /* TODO:
1941 * STBC_param.dual_cts
1942 * STBC_param.LSIG_TXOP_FILL
1943 */
1944
1945 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1946 &htprot, sizeof(htprot));
1947
1948 priv->association_mode.greenfield =
1949 cw1200_ht_greenfield(&priv->ht_info);
1950 priv->association_mode.flags =
1951 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1952 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1953 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1954 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1955 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1956 priv->association_mode.preamble =
1957 info->use_short_preamble ?
1958 WSM_JOIN_PREAMBLE_SHORT :
1959 WSM_JOIN_PREAMBLE_LONG;
1960 priv->association_mode.basic_rate_set = __cpu_to_le32(
1961 cw1200_rate_mask_to_wsm(priv,
1962 info->basic_rates));
1963 priv->association_mode.mpdu_start_spacing =
1964 cw1200_ht_ampdu_density(&priv->ht_info);
1965
1966 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1967 cancel_work_sync(&priv->unjoin_work);
1968
1969 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1970 priv->bss_params.aid = info->aid;
1971
1972 if (priv->join_dtim_period < 1)
1973 priv->join_dtim_period = 1;
1974
1975 pr_debug("[STA] DTIM %d, interval: %d\n",
1976 priv->join_dtim_period, priv->beacon_int);
1977 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1978 priv->association_mode.preamble,
1979 priv->association_mode.greenfield,
1980 priv->bss_params.aid,
1981 priv->bss_params.operational_rate_set,
1982 priv->association_mode.basic_rate_set);
1983 wsm_set_association_mode(priv, &priv->association_mode);
1984
1985 if (!info->ibss_joined) {
1986 wsm_keep_alive_period(priv, 30 /* sec */);
1987 wsm_set_bss_params(priv, &priv->bss_params);
1988 priv->setbssparams_done = true;
1989 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1990 cw1200_set_pm(priv, &priv->powersave_mode);
1991 }
1992 if (priv->vif->p2p) {
1993 pr_debug("[STA] Setting p2p powersave configuration.\n");
1994 wsm_set_p2p_ps_modeinfo(priv,
1995 &priv->p2p_ps_modeinfo);
1996 }
1997 if (priv->bt_present)
1998 cw1200_set_btcoexinfo(priv);
1999 } else {
2000 memset(&priv->association_mode, 0,
2001 sizeof(priv->association_mode));
2002 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
2003 }
2004 }
2005
2006 /* ERP Protection */
2007 if (changed & (BSS_CHANGED_ASSOC |
2008 BSS_CHANGED_ERP_CTS_PROT |
2009 BSS_CHANGED_ERP_PREAMBLE)) {
2010 u32 prev_erp_info = priv->erp_info;
2011 if (info->use_cts_prot)
2012 priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2013 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2014 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2015
2016 if (info->use_short_preamble)
2017 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2018 else
2019 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2020
2021 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2022
2023 if (prev_erp_info != priv->erp_info)
2024 queue_work(priv->workqueue, &priv->set_cts_work);
2025 }
2026
2027 /* ERP Slottime */
2028 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2029 __le32 slot_time = info->use_short_slot ?
2030 __cpu_to_le32(9) : __cpu_to_le32(20);
2031 pr_debug("[STA] Slot time: %d us.\n",
2032 __le32_to_cpu(slot_time));
2033 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2034 &slot_time, sizeof(slot_time));
2035 }
2036
2037 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2038 struct wsm_rcpi_rssi_threshold threshold = {
2039 .rollingAverageCount = 8,
2040 };
2041 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2042 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2043 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2044 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2045
2046 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2047 /* RSSI subscription enabled */
2048 /* TODO: It's not a correct way of setting threshold.
2049 * Upper and lower must be set equal here and adjusted
2050 * in callback. However current implementation is much
2051 * more relaible and stable.
2052 */
2053
2054 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2055 * RSSI = RCPI / 2 - 110
2056 */
2057 if (priv->cqm_use_rssi) {
2058 threshold.upperThreshold =
2059 info->cqm_rssi_thold + info->cqm_rssi_hyst;
2060 threshold.lowerThreshold =
2061 info->cqm_rssi_thold;
2062 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2063 } else {
2064 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2065 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2066 }
2067 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2068 } else {
2069 /* There is a bug in FW, see sta.c. We have to enable
2070 * dummy subscription to get correct RSSI values.
2071 */
2072 threshold.rssiRcpiMode |=
2073 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2074 WSM_RCPI_RSSI_DONT_USE_UPPER |
2075 WSM_RCPI_RSSI_DONT_USE_LOWER;
2076 if (priv->cqm_use_rssi)
2077 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2078 }
2079 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2080 }
2081 mutex_unlock(&priv->conf_mutex);
2082
2083 if (do_join) {
2084 wsm_lock_tx(priv);
2085 cw1200_do_join(priv); /* Will unlock it for us */
2086 }
2087 }
2088
2089 void cw1200_multicast_start_work(struct work_struct *work)
2090 {
2091 struct cw1200_common *priv =
2092 container_of(work, struct cw1200_common, multicast_start_work);
2093 long tmo = priv->join_dtim_period *
2094 (priv->beacon_int + 20) * HZ / 1024;
2095
2096 cancel_work_sync(&priv->multicast_stop_work);
2097
2098 if (!priv->aid0_bit_set) {
2099 wsm_lock_tx(priv);
2100 cw1200_set_tim_impl(priv, true);
2101 priv->aid0_bit_set = true;
2102 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2103 wsm_unlock_tx(priv);
2104 }
2105 }
2106
2107 void cw1200_multicast_stop_work(struct work_struct *work)
2108 {
2109 struct cw1200_common *priv =
2110 container_of(work, struct cw1200_common, multicast_stop_work);
2111
2112 if (priv->aid0_bit_set) {
2113 del_timer_sync(&priv->mcast_timeout);
2114 wsm_lock_tx(priv);
2115 priv->aid0_bit_set = false;
2116 cw1200_set_tim_impl(priv, false);
2117 wsm_unlock_tx(priv);
2118 }
2119 }
2120
2121 void cw1200_mcast_timeout(unsigned long arg)
2122 {
2123 struct cw1200_common *priv =
2124 (struct cw1200_common *)arg;
2125
2126 wiphy_warn(priv->hw->wiphy,
2127 "Multicast delivery timeout.\n");
2128 spin_lock_bh(&priv->ps_state_lock);
2129 priv->tx_multicast = priv->aid0_bit_set &&
2130 priv->buffered_multicasts;
2131 if (priv->tx_multicast)
2132 cw1200_bh_wakeup(priv);
2133 spin_unlock_bh(&priv->ps_state_lock);
2134 }
2135
2136 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2137 struct ieee80211_vif *vif,
2138 enum ieee80211_ampdu_mlme_action action,
2139 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2140 u8 buf_size)
2141 {
2142 /* Aggregation is implemented fully in firmware,
2143 * including block ack negotiation. Do not allow
2144 * mac80211 stack to do anything: it interferes with
2145 * the firmware.
2146 */
2147
2148 /* Note that we still need this function stubbed. */
2149 return -ENOTSUPP;
2150 }
2151
2152 /* ******************************************************************** */
2153 /* WSM callback */
2154 void cw1200_suspend_resume(struct cw1200_common *priv,
2155 struct wsm_suspend_resume *arg)
2156 {
2157 pr_debug("[AP] %s: %s\n",
2158 arg->stop ? "stop" : "start",
2159 arg->multicast ? "broadcast" : "unicast");
2160
2161 if (arg->multicast) {
2162 bool cancel_tmo = false;
2163 spin_lock_bh(&priv->ps_state_lock);
2164 if (arg->stop) {
2165 priv->tx_multicast = false;
2166 } else {
2167 /* Firmware sends this indication every DTIM if there
2168 * is a STA in powersave connected. There is no reason
2169 * to suspend, following wakeup will consume much more
2170 * power than it could be saved.
2171 */
2172 cw1200_pm_stay_awake(&priv->pm_state,
2173 priv->join_dtim_period *
2174 (priv->beacon_int + 20) * HZ / 1024);
2175 priv->tx_multicast = (priv->aid0_bit_set &&
2176 priv->buffered_multicasts);
2177 if (priv->tx_multicast) {
2178 cancel_tmo = true;
2179 cw1200_bh_wakeup(priv);
2180 }
2181 }
2182 spin_unlock_bh(&priv->ps_state_lock);
2183 if (cancel_tmo)
2184 del_timer_sync(&priv->mcast_timeout);
2185 } else {
2186 spin_lock_bh(&priv->ps_state_lock);
2187 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2188 spin_unlock_bh(&priv->ps_state_lock);
2189 if (!arg->stop)
2190 cw1200_bh_wakeup(priv);
2191 }
2192 return;
2193 }
2194
2195 /* ******************************************************************** */
2196 /* AP privates */
2197
2198 static int cw1200_upload_beacon(struct cw1200_common *priv)
2199 {
2200 int ret = 0;
2201 struct ieee80211_mgmt *mgmt;
2202 struct wsm_template_frame frame = {
2203 .frame_type = WSM_FRAME_TYPE_BEACON,
2204 };
2205
2206 u16 tim_offset;
2207 u16 tim_len;
2208
2209 if (priv->mode == NL80211_IFTYPE_STATION ||
2210 priv->mode == NL80211_IFTYPE_MONITOR ||
2211 priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2212 goto done;
2213
2214 if (priv->vif->p2p)
2215 frame.rate = WSM_TRANSMIT_RATE_6;
2216
2217 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2218 &tim_offset, &tim_len);
2219 if (!frame.skb)
2220 return -ENOMEM;
2221
2222 ret = wsm_set_template_frame(priv, &frame);
2223
2224 if (ret)
2225 goto done;
2226
2227 /* TODO: Distill probe resp; remove TIM
2228 * and any other beacon-specific IEs
2229 */
2230 mgmt = (void *)frame.skb->data;
2231 mgmt->frame_control =
2232 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2233 IEEE80211_STYPE_PROBE_RESP);
2234
2235 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2236 if (priv->vif->p2p) {
2237 ret = wsm_set_probe_responder(priv, true);
2238 } else {
2239 ret = wsm_set_template_frame(priv, &frame);
2240 wsm_set_probe_responder(priv, false);
2241 }
2242
2243 done:
2244 dev_kfree_skb(frame.skb);
2245
2246 return ret;
2247 }
2248
2249 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2250 {
2251 int ret = 0;
2252 struct wsm_template_frame frame = {
2253 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2254 .rate = 0xFF,
2255 };
2256
2257
2258 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2259 if (!frame.skb)
2260 return -ENOMEM;
2261
2262 ret = wsm_set_template_frame(priv, &frame);
2263
2264 dev_kfree_skb(frame.skb);
2265
2266 return ret;
2267 }
2268
2269 static int cw1200_upload_null(struct cw1200_common *priv)
2270 {
2271 int ret = 0;
2272 struct wsm_template_frame frame = {
2273 .frame_type = WSM_FRAME_TYPE_NULL,
2274 .rate = 0xFF,
2275 };
2276
2277 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
2278 if (!frame.skb)
2279 return -ENOMEM;
2280
2281 ret = wsm_set_template_frame(priv, &frame);
2282
2283 dev_kfree_skb(frame.skb);
2284
2285 return ret;
2286 }
2287
2288 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2289 {
2290 int ret = 0;
2291 /* TODO: This needs to be implemented
2292
2293 struct wsm_template_frame frame = {
2294 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2295 .rate = 0xFF,
2296 };
2297
2298 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2299 if (!frame.skb)
2300 return -ENOMEM;
2301
2302 ret = wsm_set_template_frame(priv, &frame);
2303
2304 dev_kfree_skb(frame.skb);
2305
2306 */
2307 return ret;
2308 }
2309
2310 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2311 bool enable)
2312 {
2313 struct wsm_beacon_transmit transmit = {
2314 .enable_beaconing = enable,
2315 };
2316
2317 return wsm_beacon_transmit(priv, &transmit);
2318 }
2319
2320 static int cw1200_start_ap(struct cw1200_common *priv)
2321 {
2322 int ret;
2323 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2324 struct wsm_start start = {
2325 .mode = priv->vif->p2p ?
2326 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2327 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
2328 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2329 .channel_number = priv->channel->hw_value,
2330 .beacon_interval = conf->beacon_int,
2331 .dtim_period = conf->dtim_period,
2332 .preamble = conf->use_short_preamble ?
2333 WSM_JOIN_PREAMBLE_SHORT :
2334 WSM_JOIN_PREAMBLE_LONG,
2335 .probe_delay = 100,
2336 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2337 conf->basic_rates),
2338 };
2339 struct wsm_operational_mode mode = {
2340 .power_mode = cw1200_power_mode,
2341 .disable_more_flag_usage = true,
2342 };
2343
2344 memset(start.ssid, 0, sizeof(start.ssid));
2345 if (!conf->hidden_ssid) {
2346 start.ssid_len = conf->ssid_len;
2347 memcpy(start.ssid, conf->ssid, start.ssid_len);
2348 }
2349
2350 priv->beacon_int = conf->beacon_int;
2351 priv->join_dtim_period = conf->dtim_period;
2352
2353 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2354
2355 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2356 start.channel_number, start.band,
2357 start.beacon_interval, start.dtim_period,
2358 start.basic_rate_set,
2359 start.ssid_len, start.ssid);
2360 ret = wsm_start(priv, &start);
2361 if (!ret)
2362 ret = cw1200_upload_keys(priv);
2363 if (!ret && priv->vif->p2p) {
2364 pr_debug("[AP] Setting p2p powersave configuration.\n");
2365 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2366 }
2367 if (!ret) {
2368 wsm_set_block_ack_policy(priv, 0, 0);
2369 priv->join_status = CW1200_JOIN_STATUS_AP;
2370 cw1200_update_filtering(priv);
2371 }
2372 wsm_set_operational_mode(priv, &mode);
2373 return ret;
2374 }
2375
2376 static int cw1200_update_beaconing(struct cw1200_common *priv)
2377 {
2378 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2379 struct wsm_reset reset = {
2380 .link_id = 0,
2381 .reset_statistics = true,
2382 };
2383
2384 if (priv->mode == NL80211_IFTYPE_AP) {
2385 /* TODO: check if changed channel, band */
2386 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2387 priv->beacon_int != conf->beacon_int) {
2388 pr_debug("ap restarting\n");
2389 wsm_lock_tx(priv);
2390 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2391 wsm_reset(priv, &reset);
2392 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2393 cw1200_start_ap(priv);
2394 wsm_unlock_tx(priv);
2395 } else
2396 pr_debug("ap started join_status: %d\n",
2397 priv->join_status);
2398 }
2399 return 0;
2400 }
Linux kernel - Deliverables
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