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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / net / wireless / st / cw1200 / sta.c
blobd0ddcde6c695fb6c5efd9b2283c76e98328fdbdf
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_UAPSD |
217 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
218
219 mutex_lock(&priv->conf_mutex);
220
221 if (priv->mode != NL80211_IFTYPE_MONITOR) {
222 mutex_unlock(&priv->conf_mutex);
223 return -EOPNOTSUPP;
224 }
225
226 switch (vif->type) {
227 case NL80211_IFTYPE_STATION:
228 case NL80211_IFTYPE_ADHOC:
229 case NL80211_IFTYPE_MESH_POINT:
230 case NL80211_IFTYPE_AP:
231 priv->mode = vif->type;
232 break;
233 default:
234 mutex_unlock(&priv->conf_mutex);
235 return -EOPNOTSUPP;
236 }
237
238 priv->vif = vif;
239 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
240 ret = cw1200_setup_mac(priv);
241 /* Enable auto-calibration */
242 /* Exception in subsequent channel switch; disabled.
243 * wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
244 * &auto_calibration_mode, sizeof(auto_calibration_mode));
245 */
246
247 mutex_unlock(&priv->conf_mutex);
248 return ret;
249 }
250
251 void cw1200_remove_interface(struct ieee80211_hw *dev,
252 struct ieee80211_vif *vif)
253 {
254 struct cw1200_common *priv = dev->priv;
255 struct wsm_reset reset = {
256 .reset_statistics = true,
257 };
258 int i;
259
260 mutex_lock(&priv->conf_mutex);
261 switch (priv->join_status) {
262 case CW1200_JOIN_STATUS_JOINING:
263 case CW1200_JOIN_STATUS_PRE_STA:
264 case CW1200_JOIN_STATUS_STA:
265 case CW1200_JOIN_STATUS_IBSS:
266 wsm_lock_tx(priv);
267 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
268 wsm_unlock_tx(priv);
269 break;
270 case CW1200_JOIN_STATUS_AP:
271 for (i = 0; priv->link_id_map; ++i) {
272 if (priv->link_id_map & BIT(i)) {
273 reset.link_id = i;
274 wsm_reset(priv, &reset);
275 priv->link_id_map &= ~BIT(i);
276 }
277 }
278 memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
279 priv->sta_asleep_mask = 0;
280 priv->enable_beacon = false;
281 priv->tx_multicast = false;
282 priv->aid0_bit_set = false;
283 priv->buffered_multicasts = false;
284 priv->pspoll_mask = 0;
285 reset.link_id = 0;
286 wsm_reset(priv, &reset);
287 break;
288 case CW1200_JOIN_STATUS_MONITOR:
289 cw1200_update_listening(priv, false);
290 break;
291 default:
292 break;
293 }
294 priv->vif = NULL;
295 priv->mode = NL80211_IFTYPE_MONITOR;
296 eth_zero_addr(priv->mac_addr);
297 memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
298 cw1200_free_keys(priv);
299 cw1200_setup_mac(priv);
300 priv->listening = false;
301 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
302 if (!__cw1200_flush(priv, true))
303 wsm_unlock_tx(priv);
304
305 mutex_unlock(&priv->conf_mutex);
306 }
307
308 int cw1200_change_interface(struct ieee80211_hw *dev,
309 struct ieee80211_vif *vif,
310 enum nl80211_iftype new_type,
311 bool p2p)
312 {
313 int ret = 0;
314 pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
315 p2p, vif->type, vif->p2p);
316
317 if (new_type != vif->type || vif->p2p != p2p) {
318 cw1200_remove_interface(dev, vif);
319 vif->type = new_type;
320 vif->p2p = p2p;
321 ret = cw1200_add_interface(dev, vif);
322 }
323
324 return ret;
325 }
326
327 int cw1200_config(struct ieee80211_hw *dev, u32 changed)
328 {
329 int ret = 0;
330 struct cw1200_common *priv = dev->priv;
331 struct ieee80211_conf *conf = &dev->conf;
332
333 pr_debug("CONFIG CHANGED: %08x\n", changed);
334
335 down(&priv->scan.lock);
336 mutex_lock(&priv->conf_mutex);
337 /* TODO: IEEE80211_CONF_CHANGE_QOS */
338 /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
339
340 if (changed & IEEE80211_CONF_CHANGE_POWER) {
341 priv->output_power = conf->power_level;
342 pr_debug("[STA] TX power: %d\n", priv->output_power);
343 wsm_set_output_power(priv, priv->output_power * 10);
344 }
345
346 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
347 (priv->channel != conf->chandef.chan)) {
348 struct ieee80211_channel *ch = conf->chandef.chan;
349 struct wsm_switch_channel channel = {
350 .channel_number = ch->hw_value,
351 };
352 pr_debug("[STA] Freq %d (wsm ch: %d).\n",
353 ch->center_freq, ch->hw_value);
354
355 /* __cw1200_flush() implicitly locks tx, if successful */
356 if (!__cw1200_flush(priv, false)) {
357 if (!wsm_switch_channel(priv, &channel)) {
358 ret = wait_event_timeout(priv->channel_switch_done,
359 !priv->channel_switch_in_progress,
360 3 * HZ);
361 if (ret) {
362 /* Already unlocks if successful */
363 priv->channel = ch;
364 ret = 0;
365 } else {
366 ret = -ETIMEDOUT;
367 }
368 } else {
369 /* Unlock if switch channel fails */
370 wsm_unlock_tx(priv);
371 }
372 }
373 }
374
375 if (changed & IEEE80211_CONF_CHANGE_PS) {
376 if (!(conf->flags & IEEE80211_CONF_PS))
377 priv->powersave_mode.mode = WSM_PSM_ACTIVE;
378 else if (conf->dynamic_ps_timeout <= 0)
379 priv->powersave_mode.mode = WSM_PSM_PS;
380 else
381 priv->powersave_mode.mode = WSM_PSM_FAST_PS;
382
383 /* Firmware requires that value for this 1-byte field must
384 * be specified in units of 500us. Values above the 128ms
385 * threshold are not supported.
386 */
387 if (conf->dynamic_ps_timeout >= 0x80)
388 priv->powersave_mode.fast_psm_idle_period = 0xFF;
389 else
390 priv->powersave_mode.fast_psm_idle_period =
391 conf->dynamic_ps_timeout << 1;
392
393 if (priv->join_status == CW1200_JOIN_STATUS_STA &&
394 priv->bss_params.aid)
395 cw1200_set_pm(priv, &priv->powersave_mode);
396 }
397
398 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
399 /* TBD: It looks like it's transparent
400 * there's a monitor interface present -- use this
401 * to determine for example whether to calculate
402 * timestamps for packets or not, do not use instead
403 * of filter flags!
404 */
405 }
406
407 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
408 struct wsm_operational_mode mode = {
409 .power_mode = cw1200_power_mode,
410 .disable_more_flag_usage = true,
411 };
412
413 wsm_lock_tx(priv);
414 /* Disable p2p-dev mode forced by TX request */
415 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
416 (conf->flags & IEEE80211_CONF_IDLE) &&
417 !priv->listening) {
418 cw1200_disable_listening(priv);
419 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
420 }
421 wsm_set_operational_mode(priv, &mode);
422 wsm_unlock_tx(priv);
423 }
424
425 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
426 pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
427 conf->long_frame_max_tx_count,
428 conf->short_frame_max_tx_count);
429 spin_lock_bh(&priv->tx_policy_cache.lock);
430 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
431 priv->short_frame_max_tx_count =
432 (conf->short_frame_max_tx_count < 0x0F) ?
433 conf->short_frame_max_tx_count : 0x0F;
434 priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
435 spin_unlock_bh(&priv->tx_policy_cache.lock);
436 }
437 mutex_unlock(&priv->conf_mutex);
438 up(&priv->scan.lock);
439 return ret;
440 }
441
442 void cw1200_update_filtering(struct cw1200_common *priv)
443 {
444 int ret;
445 bool bssid_filtering = !priv->rx_filter.bssid;
446 bool is_p2p = priv->vif && priv->vif->p2p;
447 bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
448
449 static struct wsm_beacon_filter_control bf_ctrl;
450 static struct wsm_mib_beacon_filter_table bf_tbl = {
451 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
452 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
453 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
454 WSM_BEACON_FILTER_IE_HAS_APPEARED,
455 .entry[0].oui[0] = 0x50,
456 .entry[0].oui[1] = 0x6F,
457 .entry[0].oui[2] = 0x9A,
458 .entry[1].ie_id = WLAN_EID_HT_OPERATION,
459 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
460 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
461 WSM_BEACON_FILTER_IE_HAS_APPEARED,
462 .entry[2].ie_id = WLAN_EID_ERP_INFO,
463 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
464 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
465 WSM_BEACON_FILTER_IE_HAS_APPEARED,
466 };
467
468 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
469 return;
470 else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
471 bssid_filtering = false;
472
473 if (priv->disable_beacon_filter) {
474 bf_ctrl.enabled = 0;
475 bf_ctrl.bcn_count = 1;
476 bf_tbl.num = __cpu_to_le32(0);
477 } else if (is_p2p || !is_sta) {
478 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
479 WSM_BEACON_FILTER_AUTO_ERP;
480 bf_ctrl.bcn_count = 0;
481 bf_tbl.num = __cpu_to_le32(2);
482 } else {
483 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
484 bf_ctrl.bcn_count = 0;
485 bf_tbl.num = __cpu_to_le32(3);
486 }
487
488 /* When acting as p2p client being connected to p2p GO, in order to
489 * receive frames from a different p2p device, turn off bssid filter.
490 *
491 * WARNING: FW dependency!
492 * This can only be used with FW WSM371 and its successors.
493 * In that FW version even with bssid filter turned off,
494 * device will block most of the unwanted frames.
495 */
496 if (is_p2p)
497 bssid_filtering = false;
498
499 ret = wsm_set_rx_filter(priv, &priv->rx_filter);
500 if (!ret)
501 ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
502 if (!ret)
503 ret = wsm_beacon_filter_control(priv, &bf_ctrl);
504 if (!ret)
505 ret = wsm_set_bssid_filtering(priv, bssid_filtering);
506 if (!ret)
507 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
508 if (ret)
509 wiphy_err(priv->hw->wiphy,
510 "Update filtering failed: %d.\n", ret);
511 return;
512 }
513
514 void cw1200_update_filtering_work(struct work_struct *work)
515 {
516 struct cw1200_common *priv =
517 container_of(work, struct cw1200_common,
518 update_filtering_work);
519
520 cw1200_update_filtering(priv);
521 }
522
523 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
524 {
525 struct cw1200_common *priv =
526 container_of(work, struct cw1200_common,
527 set_beacon_wakeup_period_work);
528
529 wsm_set_beacon_wakeup_period(priv,
530 priv->beacon_int * priv->join_dtim_period >
531 MAX_BEACON_SKIP_TIME_MS ? 1 :
532 priv->join_dtim_period, 0);
533 }
534
535 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
536 struct netdev_hw_addr_list *mc_list)
537 {
538 static u8 broadcast_ipv6[ETH_ALEN] = {
539 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
540 };
541 static u8 broadcast_ipv4[ETH_ALEN] = {
542 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
543 };
544 struct cw1200_common *priv = hw->priv;
545 struct netdev_hw_addr *ha;
546 int count = 0;
547
548 /* Disable multicast filtering */
549 priv->has_multicast_subscription = false;
550 memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
551
552 if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
553 return 0;
554
555 /* Enable if requested */
556 netdev_hw_addr_list_for_each(ha, mc_list) {
557 pr_debug("[STA] multicast: %pM\n", ha->addr);
558 memcpy(&priv->multicast_filter.macaddrs[count],
559 ha->addr, ETH_ALEN);
560 if (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
561 !ether_addr_equal(ha->addr, broadcast_ipv6))
562 priv->has_multicast_subscription = true;
563 count++;
564 }
565
566 if (count) {
567 priv->multicast_filter.enable = __cpu_to_le32(1);
568 priv->multicast_filter.num_addrs = __cpu_to_le32(count);
569 }
570
571 return netdev_hw_addr_list_count(mc_list);
572 }
573
574 void cw1200_configure_filter(struct ieee80211_hw *dev,
575 unsigned int changed_flags,
576 unsigned int *total_flags,
577 u64 multicast)
578 {
579 struct cw1200_common *priv = dev->priv;
580 bool listening = !!(*total_flags &
581 (FIF_OTHER_BSS |
582 FIF_BCN_PRBRESP_PROMISC |
583 FIF_PROBE_REQ));
584
585 *total_flags &= 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 = 0;
594 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
595 FIF_PROBE_REQ)) ? 1 : 0;
596 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
597 priv->disable_beacon_filter = !(*total_flags &
598 (FIF_BCN_PRBRESP_PROMISC |
599 FIF_PROBE_REQ));
600 if (priv->listening != listening) {
601 priv->listening = listening;
602 wsm_lock_tx(priv);
603 cw1200_update_listening(priv, listening);
604 wsm_unlock_tx(priv);
605 }
606 cw1200_update_filtering(priv);
607 mutex_unlock(&priv->conf_mutex);
608 up(&priv->scan.lock);
609 }
610
611 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
612 u16 queue, const struct ieee80211_tx_queue_params *params)
613 {
614 struct cw1200_common *priv = dev->priv;
615 int ret = 0;
616 /* To prevent re-applying PM request OID again and again*/
617 bool old_uapsd_flags;
618
619 mutex_lock(&priv->conf_mutex);
620
621 if (queue < dev->queues) {
622 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
623
624 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
625 ret = wsm_set_tx_queue_params(priv,
626 &priv->tx_queue_params.params[queue], queue);
627 if (ret) {
628 ret = -EINVAL;
629 goto out;
630 }
631
632 WSM_EDCA_SET(&priv->edca, queue, params->aifs,
633 params->cw_min, params->cw_max,
634 params->txop, 0xc8,
635 params->uapsd);
636 ret = wsm_set_edca_params(priv, &priv->edca);
637 if (ret) {
638 ret = -EINVAL;
639 goto out;
640 }
641
642 if (priv->mode == NL80211_IFTYPE_STATION) {
643 ret = cw1200_set_uapsd_param(priv, &priv->edca);
644 if (!ret && priv->setbssparams_done &&
645 (priv->join_status == CW1200_JOIN_STATUS_STA) &&
646 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
647 ret = cw1200_set_pm(priv, &priv->powersave_mode);
648 }
649 } else {
650 ret = -EINVAL;
651 }
652
653 out:
654 mutex_unlock(&priv->conf_mutex);
655 return ret;
656 }
657
658 int cw1200_get_stats(struct ieee80211_hw *dev,
659 struct ieee80211_low_level_stats *stats)
660 {
661 struct cw1200_common *priv = dev->priv;
662
663 memcpy(stats, &priv->stats, sizeof(*stats));
664 return 0;
665 }
666
667 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
668 {
669 struct wsm_set_pm pm = *arg;
670
671 if (priv->uapsd_info.uapsd_flags != 0)
672 pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
673
674 if (memcmp(&pm, &priv->firmware_ps_mode,
675 sizeof(struct wsm_set_pm))) {
676 priv->firmware_ps_mode = pm;
677 return wsm_set_pm(priv, &pm);
678 } else {
679 return 0;
680 }
681 }
682
683 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
684 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
685 struct ieee80211_key_conf *key)
686 {
687 int ret = -EOPNOTSUPP;
688 struct cw1200_common *priv = dev->priv;
689 struct ieee80211_key_seq seq;
690
691 mutex_lock(&priv->conf_mutex);
692
693 if (cmd == SET_KEY) {
694 u8 *peer_addr = NULL;
695 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
696 1 : 0;
697 int idx = cw1200_alloc_key(priv);
698 struct wsm_add_key *wsm_key = &priv->keys[idx];
699
700 if (idx < 0) {
701 ret = -EINVAL;
702 goto finally;
703 }
704
705 if (sta)
706 peer_addr = sta->addr;
707
708 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE |
709 IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
710
711 switch (key->cipher) {
712 case WLAN_CIPHER_SUITE_WEP40:
713 case WLAN_CIPHER_SUITE_WEP104:
714 if (key->keylen > 16) {
715 cw1200_free_key(priv, idx);
716 ret = -EINVAL;
717 goto finally;
718 }
719
720 if (pairwise) {
721 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
722 memcpy(wsm_key->wep_pairwise.peer,
723 peer_addr, ETH_ALEN);
724 memcpy(wsm_key->wep_pairwise.keydata,
725 &key->key[0], key->keylen);
726 wsm_key->wep_pairwise.keylen = key->keylen;
727 } else {
728 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
729 memcpy(wsm_key->wep_group.keydata,
730 &key->key[0], key->keylen);
731 wsm_key->wep_group.keylen = key->keylen;
732 wsm_key->wep_group.keyid = key->keyidx;
733 }
734 break;
735 case WLAN_CIPHER_SUITE_TKIP:
736 ieee80211_get_key_rx_seq(key, 0, &seq);
737 if (pairwise) {
738 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
739 memcpy(wsm_key->tkip_pairwise.peer,
740 peer_addr, ETH_ALEN);
741 memcpy(wsm_key->tkip_pairwise.keydata,
742 &key->key[0], 16);
743 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
744 &key->key[16], 8);
745 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
746 &key->key[24], 8);
747 } else {
748 size_t mic_offset =
749 (priv->mode == NL80211_IFTYPE_AP) ?
750 16 : 24;
751 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
752 memcpy(wsm_key->tkip_group.keydata,
753 &key->key[0], 16);
754 memcpy(wsm_key->tkip_group.rx_mic_key,
755 &key->key[mic_offset], 8);
756
757 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
758 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
759 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
760 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
761 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
762 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
763 wsm_key->tkip_group.rx_seqnum[6] = 0;
764 wsm_key->tkip_group.rx_seqnum[7] = 0;
765
766 wsm_key->tkip_group.keyid = key->keyidx;
767 }
768 break;
769 case WLAN_CIPHER_SUITE_CCMP:
770 ieee80211_get_key_rx_seq(key, 0, &seq);
771 if (pairwise) {
772 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
773 memcpy(wsm_key->aes_pairwise.peer,
774 peer_addr, ETH_ALEN);
775 memcpy(wsm_key->aes_pairwise.keydata,
776 &key->key[0], 16);
777 } else {
778 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
779 memcpy(wsm_key->aes_group.keydata,
780 &key->key[0], 16);
781
782 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
783 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
784 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
785 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
786 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
787 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
788 wsm_key->aes_group.rx_seqnum[6] = 0;
789 wsm_key->aes_group.rx_seqnum[7] = 0;
790 wsm_key->aes_group.keyid = key->keyidx;
791 }
792 break;
793 case WLAN_CIPHER_SUITE_SMS4:
794 if (pairwise) {
795 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
796 memcpy(wsm_key->wapi_pairwise.peer,
797 peer_addr, ETH_ALEN);
798 memcpy(wsm_key->wapi_pairwise.keydata,
799 &key->key[0], 16);
800 memcpy(wsm_key->wapi_pairwise.mic_key,
801 &key->key[16], 16);
802 wsm_key->wapi_pairwise.keyid = key->keyidx;
803 } else {
804 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
805 memcpy(wsm_key->wapi_group.keydata,
806 &key->key[0], 16);
807 memcpy(wsm_key->wapi_group.mic_key,
808 &key->key[16], 16);
809 wsm_key->wapi_group.keyid = key->keyidx;
810 }
811 break;
812 default:
813 pr_warn("Unhandled key type %d\n", key->cipher);
814 cw1200_free_key(priv, idx);
815 ret = -EOPNOTSUPP;
816 goto finally;
817 }
818 ret = wsm_add_key(priv, wsm_key);
819 if (!ret)
820 key->hw_key_idx = idx;
821 else
822 cw1200_free_key(priv, idx);
823 } else if (cmd == DISABLE_KEY) {
824 struct wsm_remove_key wsm_key = {
825 .index = key->hw_key_idx,
826 };
827
828 if (wsm_key.index > WSM_KEY_MAX_INDEX) {
829 ret = -EINVAL;
830 goto finally;
831 }
832
833 cw1200_free_key(priv, wsm_key.index);
834 ret = wsm_remove_key(priv, &wsm_key);
835 } else {
836 pr_warn("Unhandled key command %d\n", cmd);
837 }
838
839 finally:
840 mutex_unlock(&priv->conf_mutex);
841 return ret;
842 }
843
844 void cw1200_wep_key_work(struct work_struct *work)
845 {
846 struct cw1200_common *priv =
847 container_of(work, struct cw1200_common, wep_key_work);
848 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
849 struct cw1200_queue *queue = &priv->tx_queue[queue_id];
850 __le32 wep_default_key_id = __cpu_to_le32(
851 priv->wep_default_key_id);
852
853 pr_debug("[STA] Setting default WEP key: %d\n",
854 priv->wep_default_key_id);
855 wsm_flush_tx(priv);
856 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
857 &wep_default_key_id, sizeof(wep_default_key_id));
858 cw1200_queue_requeue(queue, priv->pending_frame_id);
859 wsm_unlock_tx(priv);
860 }
861
862 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
863 {
864 int ret = 0;
865 __le32 val32;
866 struct cw1200_common *priv = hw->priv;
867
868 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
869 return 0;
870
871 if (value != (u32) -1)
872 val32 = __cpu_to_le32(value);
873 else
874 val32 = 0; /* disabled */
875
876 if (priv->rts_threshold == value)
877 goto out;
878
879 pr_debug("[STA] Setting RTS threshold: %d\n",
880 priv->rts_threshold);
881
882 /* mutex_lock(&priv->conf_mutex); */
883 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
884 &val32, sizeof(val32));
885 if (!ret)
886 priv->rts_threshold = value;
887 /* mutex_unlock(&priv->conf_mutex); */
888
889 out:
890 return ret;
891 }
892
893 /* If successful, LOCKS the TX queue! */
894 static int __cw1200_flush(struct cw1200_common *priv, bool drop)
895 {
896 int i, ret;
897
898 for (;;) {
899 /* TODO: correct flush handling is required when dev_stop.
900 * Temporary workaround: 2s
901 */
902 if (drop) {
903 for (i = 0; i < 4; ++i)
904 cw1200_queue_clear(&priv->tx_queue[i]);
905 } else {
906 ret = wait_event_timeout(
907 priv->tx_queue_stats.wait_link_id_empty,
908 cw1200_queue_stats_is_empty(
909 &priv->tx_queue_stats, -1),
910 2 * HZ);
911 }
912
913 if (!drop && ret <= 0) {
914 ret = -ETIMEDOUT;
915 break;
916 } else {
917 ret = 0;
918 }
919
920 wsm_lock_tx(priv);
921 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
922 /* Highly unlikely: WSM requeued frames. */
923 wsm_unlock_tx(priv);
924 continue;
925 }
926 break;
927 }
928 return ret;
929 }
930
931 void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
932 u32 queues, bool drop)
933 {
934 struct cw1200_common *priv = hw->priv;
935
936 switch (priv->mode) {
937 case NL80211_IFTYPE_MONITOR:
938 drop = true;
939 break;
940 case NL80211_IFTYPE_AP:
941 if (!priv->enable_beacon)
942 drop = true;
943 break;
944 }
945
946 if (!__cw1200_flush(priv, drop))
947 wsm_unlock_tx(priv);
948
949 return;
950 }
951
952 /* ******************************************************************** */
953 /* WSM callbacks */
954
955 void cw1200_free_event_queue(struct cw1200_common *priv)
956 {
957 LIST_HEAD(list);
958
959 spin_lock(&priv->event_queue_lock);
960 list_splice_init(&priv->event_queue, &list);
961 spin_unlock(&priv->event_queue_lock);
962
963 __cw1200_free_event_queue(&list);
964 }
965
966 void cw1200_event_handler(struct work_struct *work)
967 {
968 struct cw1200_common *priv =
969 container_of(work, struct cw1200_common, event_handler);
970 struct cw1200_wsm_event *event;
971 LIST_HEAD(list);
972
973 spin_lock(&priv->event_queue_lock);
974 list_splice_init(&priv->event_queue, &list);
975 spin_unlock(&priv->event_queue_lock);
976
977 list_for_each_entry(event, &list, link) {
978 switch (event->evt.id) {
979 case WSM_EVENT_ERROR:
980 pr_err("Unhandled WSM Error from LMAC\n");
981 break;
982 case WSM_EVENT_BSS_LOST:
983 pr_debug("[CQM] BSS lost.\n");
984 cancel_work_sync(&priv->unjoin_work);
985 if (!down_trylock(&priv->scan.lock)) {
986 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
987 up(&priv->scan.lock);
988 } else {
989 /* Scan is in progress. Delay reporting.
990 * Scan complete will trigger bss_loss_work
991 */
992 priv->delayed_link_loss = 1;
993 /* Also start a watchdog. */
994 queue_delayed_work(priv->workqueue,
995 &priv->bss_loss_work, 5*HZ);
996 }
997 break;
998 case WSM_EVENT_BSS_REGAINED:
999 pr_debug("[CQM] BSS regained.\n");
1000 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1001 cancel_work_sync(&priv->unjoin_work);
1002 break;
1003 case WSM_EVENT_RADAR_DETECTED:
1004 wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1005 break;
1006 case WSM_EVENT_RCPI_RSSI:
1007 {
1008 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1009 * RSSI = RCPI / 2 - 110
1010 */
1011 int rcpi_rssi = (int)(event->evt.data & 0xFF);
1012 int cqm_evt;
1013 if (priv->cqm_use_rssi)
1014 rcpi_rssi = (s8)rcpi_rssi;
1015 else
1016 rcpi_rssi = rcpi_rssi / 2 - 110;
1017
1018 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1019 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1020 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1021 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1022 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
1023 GFP_KERNEL);
1024 break;
1025 }
1026 case WSM_EVENT_BT_INACTIVE:
1027 pr_warn("Unhandled BT INACTIVE from LMAC\n");
1028 break;
1029 case WSM_EVENT_BT_ACTIVE:
1030 pr_warn("Unhandled BT ACTIVE from LMAC\n");
1031 break;
1032 }
1033 }
1034 __cw1200_free_event_queue(&list);
1035 }
1036
1037 void cw1200_bss_loss_work(struct work_struct *work)
1038 {
1039 struct cw1200_common *priv =
1040 container_of(work, struct cw1200_common, bss_loss_work.work);
1041
1042 pr_debug("[CQM] Reporting connection loss.\n");
1043 wsm_lock_tx(priv);
1044 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1045 wsm_unlock_tx(priv);
1046 }
1047
1048 void cw1200_bss_params_work(struct work_struct *work)
1049 {
1050 struct cw1200_common *priv =
1051 container_of(work, struct cw1200_common, bss_params_work);
1052 mutex_lock(&priv->conf_mutex);
1053
1054 priv->bss_params.reset_beacon_loss = 1;
1055 wsm_set_bss_params(priv, &priv->bss_params);
1056 priv->bss_params.reset_beacon_loss = 0;
1057
1058 mutex_unlock(&priv->conf_mutex);
1059 }
1060
1061 /* ******************************************************************** */
1062 /* Internal API */
1063
1064 /* This function is called to Parse the SDD file
1065 * to extract listen_interval and PTA related information
1066 * sdd is a TLV: u8 id, u8 len, u8 data[]
1067 */
1068 static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1069 {
1070 const u8 *p = priv->sdd->data;
1071 int ret = 0;
1072
1073 while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1074 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1075 pr_warn("Malformed sdd structure\n");
1076 return -1;
1077 }
1078 switch (p[0]) {
1079 case SDD_PTA_CFG_ELT_ID: {
1080 u16 v;
1081 if (p[1] < 4) {
1082 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1083 ret = -1;
1084 break;
1085 }
1086 v = le16_to_cpu(*((__le16 *)(p + 2)));
1087 if (!v) /* non-zero means this is enabled */
1088 break;
1089
1090 v = le16_to_cpu(*((__le16 *)(p + 4)));
1091 priv->conf_listen_interval = (v >> 7) & 0x1F;
1092 pr_debug("PTA found; Listen Interval %d\n",
1093 priv->conf_listen_interval);
1094 break;
1095 }
1096 case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1097 u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1098 if (clk != priv->hw_refclk)
1099 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1100 clk, priv->hw_refclk);
1101 break;
1102 }
1103 default:
1104 break;
1105 }
1106 p += p[1] + 2;
1107 }
1108
1109 if (!priv->bt_present) {
1110 pr_debug("PTA element NOT found.\n");
1111 priv->conf_listen_interval = 0;
1112 }
1113 return ret;
1114 }
1115
1116 int cw1200_setup_mac(struct cw1200_common *priv)
1117 {
1118 int ret = 0;
1119
1120 /* NOTE: There is a bug in FW: it reports signal
1121 * as RSSI if RSSI subscription is enabled.
1122 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1123 *
1124 * NOTE2: RSSI based reports have been switched to RCPI, since
1125 * FW has a bug and RSSI reported values are not stable,
1126 * what can leads to signal level oscilations in user-end applications
1127 */
1128 struct wsm_rcpi_rssi_threshold threshold = {
1129 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1130 WSM_RCPI_RSSI_DONT_USE_UPPER |
1131 WSM_RCPI_RSSI_DONT_USE_LOWER,
1132 .rollingAverageCount = 16,
1133 };
1134
1135 struct wsm_configuration cfg = {
1136 .dot11StationId = &priv->mac_addr[0],
1137 };
1138
1139 /* Remember the decission here to make sure, we will handle
1140 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1141 */
1142 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1143 priv->cqm_use_rssi = true;
1144
1145 if (!priv->sdd) {
1146 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1147 if (ret) {
1148 pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1149 return ret;
1150 }
1151 cw1200_parse_sdd_file(priv);
1152 }
1153
1154 cfg.dpdData = priv->sdd->data;
1155 cfg.dpdData_size = priv->sdd->size;
1156 ret = wsm_configuration(priv, &cfg);
1157 if (ret)
1158 return ret;
1159
1160 /* Configure RSSI/SCPI reporting as RSSI. */
1161 wsm_set_rcpi_rssi_threshold(priv, &threshold);
1162
1163 return 0;
1164 }
1165
1166 static void cw1200_join_complete(struct cw1200_common *priv)
1167 {
1168 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1169
1170 priv->join_pending = false;
1171 if (priv->join_complete_status) {
1172 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1173 cw1200_update_listening(priv, priv->listening);
1174 cw1200_do_unjoin(priv);
1175 ieee80211_connection_loss(priv->vif);
1176 } else {
1177 if (priv->mode == NL80211_IFTYPE_ADHOC)
1178 priv->join_status = CW1200_JOIN_STATUS_IBSS;
1179 else
1180 priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1181 }
1182 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1183 }
1184
1185 void cw1200_join_complete_work(struct work_struct *work)
1186 {
1187 struct cw1200_common *priv =
1188 container_of(work, struct cw1200_common, join_complete_work);
1189 mutex_lock(&priv->conf_mutex);
1190 cw1200_join_complete(priv);
1191 mutex_unlock(&priv->conf_mutex);
1192 }
1193
1194 void cw1200_join_complete_cb(struct cw1200_common *priv,
1195 struct wsm_join_complete *arg)
1196 {
1197 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1198 arg->status);
1199
1200 if (cancel_delayed_work(&priv->join_timeout)) {
1201 priv->join_complete_status = arg->status;
1202 queue_work(priv->workqueue, &priv->join_complete_work);
1203 }
1204 }
1205
1206 /* MUST be called with tx_lock held! It will be unlocked for us. */
1207 static void cw1200_do_join(struct cw1200_common *priv)
1208 {
1209 const u8 *bssid;
1210 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1211 struct cfg80211_bss *bss = NULL;
1212 struct wsm_protected_mgmt_policy mgmt_policy;
1213 struct wsm_join join = {
1214 .mode = conf->ibss_joined ?
1215 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1216 .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1217 .probe_for_join = 1,
1218 .atim_window = 0,
1219 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1220 conf->basic_rates),
1221 };
1222 if (delayed_work_pending(&priv->join_timeout)) {
1223 pr_warn("[STA] - Join request already pending, skipping..\n");
1224 wsm_unlock_tx(priv);
1225 return;
1226 }
1227
1228 if (priv->join_status)
1229 cw1200_do_unjoin(priv);
1230
1231 bssid = priv->vif->bss_conf.bssid;
1232
1233 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0,
1234 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
1235
1236 if (!bss && !conf->ibss_joined) {
1237 wsm_unlock_tx(priv);
1238 return;
1239 }
1240
1241 mutex_lock(&priv->conf_mutex);
1242
1243 /* Under the conf lock: check scan status and
1244 * bail out if it is in progress.
1245 */
1246 if (atomic_read(&priv->scan.in_progress)) {
1247 wsm_unlock_tx(priv);
1248 goto done_put;
1249 }
1250
1251 priv->join_pending = true;
1252
1253 /* Sanity check basic rates */
1254 if (!join.basic_rate_set)
1255 join.basic_rate_set = 7;
1256
1257 /* Sanity check beacon interval */
1258 if (!priv->beacon_int)
1259 priv->beacon_int = 1;
1260
1261 join.beacon_interval = priv->beacon_int;
1262
1263 /* BT Coex related changes */
1264 if (priv->bt_present) {
1265 if (((priv->conf_listen_interval * 100) %
1266 priv->beacon_int) == 0)
1267 priv->listen_interval =
1268 ((priv->conf_listen_interval * 100) /
1269 priv->beacon_int);
1270 else
1271 priv->listen_interval =
1272 ((priv->conf_listen_interval * 100) /
1273 priv->beacon_int + 1);
1274 }
1275
1276 if (priv->hw->conf.ps_dtim_period)
1277 priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1278 join.dtim_period = priv->join_dtim_period;
1279
1280 join.channel_number = priv->channel->hw_value;
1281 join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
1282 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1283
1284 memcpy(join.bssid, bssid, sizeof(join.bssid));
1285
1286 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1287 join.bssid,
1288 join.dtim_period, priv->beacon_int);
1289
1290 if (!conf->ibss_joined) {
1291 const u8 *ssidie;
1292 rcu_read_lock();
1293 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1294 if (ssidie) {
1295 join.ssid_len = ssidie[1];
1296 memcpy(join.ssid, &ssidie[2], join.ssid_len);
1297 }
1298 rcu_read_unlock();
1299 }
1300
1301 if (priv->vif->p2p) {
1302 join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1303 join.basic_rate_set =
1304 cw1200_rate_mask_to_wsm(priv, 0xFF0);
1305 }
1306
1307 /* Enable asynchronous join calls */
1308 if (!conf->ibss_joined) {
1309 join.flags |= WSM_JOIN_FLAGS_FORCE;
1310 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1311 }
1312
1313 wsm_flush_tx(priv);
1314
1315 /* Stay Awake for Join and Auth Timeouts and a bit more */
1316 cw1200_pm_stay_awake(&priv->pm_state,
1317 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1318
1319 cw1200_update_listening(priv, false);
1320
1321 /* Turn on Block ACKs */
1322 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1323 priv->ba_rx_tid_mask);
1324
1325 /* Set up timeout */
1326 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1327 priv->join_status = CW1200_JOIN_STATUS_JOINING;
1328 queue_delayed_work(priv->workqueue,
1329 &priv->join_timeout,
1330 CW1200_JOIN_TIMEOUT);
1331 }
1332
1333 /* 802.11w protected mgmt frames */
1334 mgmt_policy.protectedMgmtEnable = 0;
1335 mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1336 mgmt_policy.encryptionForAuthFrame = 1;
1337 wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1338
1339 /* Perform actual join */
1340 if (wsm_join(priv, &join)) {
1341 pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1342 cancel_delayed_work_sync(&priv->join_timeout);
1343 cw1200_update_listening(priv, priv->listening);
1344 /* Tx lock still held, unjoin will clear it. */
1345 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1346 wsm_unlock_tx(priv);
1347 } else {
1348 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1349 cw1200_join_complete(priv); /* Will clear tx_lock */
1350
1351 /* Upload keys */
1352 cw1200_upload_keys(priv);
1353
1354 /* Due to beacon filtering it is possible that the
1355 * AP's beacon is not known for the mac80211 stack.
1356 * Disable filtering temporary to make sure the stack
1357 * receives at least one
1358 */
1359 priv->disable_beacon_filter = true;
1360 }
1361 cw1200_update_filtering(priv);
1362
1363 done_put:
1364 mutex_unlock(&priv->conf_mutex);
1365 if (bss)
1366 cfg80211_put_bss(priv->hw->wiphy, bss);
1367 }
1368
1369 void cw1200_join_timeout(struct work_struct *work)
1370 {
1371 struct cw1200_common *priv =
1372 container_of(work, struct cw1200_common, join_timeout.work);
1373 pr_debug("[WSM] Join timed out.\n");
1374 wsm_lock_tx(priv);
1375 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1376 wsm_unlock_tx(priv);
1377 }
1378
1379 static void cw1200_do_unjoin(struct cw1200_common *priv)
1380 {
1381 struct wsm_reset reset = {
1382 .reset_statistics = true,
1383 };
1384
1385 cancel_delayed_work_sync(&priv->join_timeout);
1386
1387 mutex_lock(&priv->conf_mutex);
1388 priv->join_pending = false;
1389
1390 if (atomic_read(&priv->scan.in_progress)) {
1391 if (priv->delayed_unjoin)
1392 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1393 else
1394 priv->delayed_unjoin = true;
1395 goto done;
1396 }
1397
1398 priv->delayed_link_loss = false;
1399
1400 if (!priv->join_status)
1401 goto done;
1402
1403 if (priv->join_status == CW1200_JOIN_STATUS_AP)
1404 goto done;
1405
1406 cancel_work_sync(&priv->update_filtering_work);
1407 cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1408 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1409
1410 /* Unjoin is a reset. */
1411 wsm_flush_tx(priv);
1412 wsm_keep_alive_period(priv, 0);
1413 wsm_reset(priv, &reset);
1414 wsm_set_output_power(priv, priv->output_power * 10);
1415 priv->join_dtim_period = 0;
1416 cw1200_setup_mac(priv);
1417 cw1200_free_event_queue(priv);
1418 cancel_work_sync(&priv->event_handler);
1419 cw1200_update_listening(priv, priv->listening);
1420 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1421
1422 /* Disable Block ACKs */
1423 wsm_set_block_ack_policy(priv, 0, 0);
1424
1425 priv->disable_beacon_filter = false;
1426 cw1200_update_filtering(priv);
1427 memset(&priv->association_mode, 0,
1428 sizeof(priv->association_mode));
1429 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1430 priv->setbssparams_done = false;
1431 memset(&priv->firmware_ps_mode, 0,
1432 sizeof(priv->firmware_ps_mode));
1433
1434 pr_debug("[STA] Unjoin completed.\n");
1435
1436 done:
1437 mutex_unlock(&priv->conf_mutex);
1438 }
1439
1440 void cw1200_unjoin_work(struct work_struct *work)
1441 {
1442 struct cw1200_common *priv =
1443 container_of(work, struct cw1200_common, unjoin_work);
1444
1445 cw1200_do_unjoin(priv);
1446
1447 /* Tell the stack we're dead */
1448 ieee80211_connection_loss(priv->vif);
1449
1450 wsm_unlock_tx(priv);
1451 }
1452
1453 int cw1200_enable_listening(struct cw1200_common *priv)
1454 {
1455 struct wsm_start start = {
1456 .mode = WSM_START_MODE_P2P_DEV,
1457 .band = WSM_PHY_BAND_2_4G,
1458 .beacon_interval = 100,
1459 .dtim_period = 1,
1460 .probe_delay = 0,
1461 .basic_rate_set = 0x0F,
1462 };
1463
1464 if (priv->channel) {
1465 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
1466 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1467 start.channel_number = priv->channel->hw_value;
1468 } else {
1469 start.band = WSM_PHY_BAND_2_4G;
1470 start.channel_number = 1;
1471 }
1472
1473 return wsm_start(priv, &start);
1474 }
1475
1476 int cw1200_disable_listening(struct cw1200_common *priv)
1477 {
1478 int ret;
1479 struct wsm_reset reset = {
1480 .reset_statistics = true,
1481 };
1482 ret = wsm_reset(priv, &reset);
1483 return ret;
1484 }
1485
1486 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1487 {
1488 if (enabled) {
1489 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1490 if (!cw1200_enable_listening(priv))
1491 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1492 wsm_set_probe_responder(priv, true);
1493 }
1494 } else {
1495 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1496 if (!cw1200_disable_listening(priv))
1497 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1498 wsm_set_probe_responder(priv, false);
1499 }
1500 }
1501 }
1502
1503 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1504 const struct wsm_edca_params *arg)
1505 {
1506 int ret;
1507 u16 uapsd_flags = 0;
1508
1509 /* Here's the mapping AC [queue, bit]
1510 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1511 */
1512
1513 if (arg->uapsd_enable[0])
1514 uapsd_flags |= 1 << 3;
1515
1516 if (arg->uapsd_enable[1])
1517 uapsd_flags |= 1 << 2;
1518
1519 if (arg->uapsd_enable[2])
1520 uapsd_flags |= 1 << 1;
1521
1522 if (arg->uapsd_enable[3])
1523 uapsd_flags |= 1;
1524
1525 /* Currently pseudo U-APSD operation is not supported, so setting
1526 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1527 * AutoTriggerStep to 0
1528 */
1529
1530 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1531 priv->uapsd_info.min_auto_trigger_interval = 0;
1532 priv->uapsd_info.max_auto_trigger_interval = 0;
1533 priv->uapsd_info.auto_trigger_step = 0;
1534
1535 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1536 return ret;
1537 }
1538
1539 /* ******************************************************************** */
1540 /* AP API */
1541
1542 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1543 struct ieee80211_sta *sta)
1544 {
1545 struct cw1200_common *priv = hw->priv;
1546 struct cw1200_sta_priv *sta_priv =
1547 (struct cw1200_sta_priv *)&sta->drv_priv;
1548 struct cw1200_link_entry *entry;
1549 struct sk_buff *skb;
1550
1551 if (priv->mode != NL80211_IFTYPE_AP)
1552 return 0;
1553
1554 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1555 if (WARN_ON(!sta_priv->link_id)) {
1556 wiphy_info(priv->hw->wiphy,
1557 "[AP] No more link IDs available.\n");
1558 return -ENOENT;
1559 }
1560
1561 entry = &priv->link_id_db[sta_priv->link_id - 1];
1562 spin_lock_bh(&priv->ps_state_lock);
1563 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1564 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1565 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1566 entry->status = CW1200_LINK_HARD;
1567 while ((skb = skb_dequeue(&entry->rx_queue)))
1568 ieee80211_rx_irqsafe(priv->hw, skb);
1569 spin_unlock_bh(&priv->ps_state_lock);
1570 return 0;
1571 }
1572
1573 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1574 struct ieee80211_sta *sta)
1575 {
1576 struct cw1200_common *priv = hw->priv;
1577 struct cw1200_sta_priv *sta_priv =
1578 (struct cw1200_sta_priv *)&sta->drv_priv;
1579 struct cw1200_link_entry *entry;
1580
1581 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1582 return 0;
1583
1584 entry = &priv->link_id_db[sta_priv->link_id - 1];
1585 spin_lock_bh(&priv->ps_state_lock);
1586 entry->status = CW1200_LINK_RESERVE;
1587 entry->timestamp = jiffies;
1588 wsm_lock_tx_async(priv);
1589 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1590 wsm_unlock_tx(priv);
1591 spin_unlock_bh(&priv->ps_state_lock);
1592 flush_workqueue(priv->workqueue);
1593 return 0;
1594 }
1595
1596 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1597 struct ieee80211_vif *vif,
1598 enum sta_notify_cmd notify_cmd,
1599 int link_id)
1600 {
1601 struct cw1200_common *priv = dev->priv;
1602 u32 bit, prev;
1603
1604 /* Zero link id means "for all link IDs" */
1605 if (link_id)
1606 bit = BIT(link_id);
1607 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1608 bit = 0;
1609 else
1610 bit = priv->link_id_map;
1611 prev = priv->sta_asleep_mask & bit;
1612
1613 switch (notify_cmd) {
1614 case STA_NOTIFY_SLEEP:
1615 if (!prev) {
1616 if (priv->buffered_multicasts &&
1617 !priv->sta_asleep_mask)
1618 queue_work(priv->workqueue,
1619 &priv->multicast_start_work);
1620 priv->sta_asleep_mask |= bit;
1621 }
1622 break;
1623 case STA_NOTIFY_AWAKE:
1624 if (prev) {
1625 priv->sta_asleep_mask &= ~bit;
1626 priv->pspoll_mask &= ~bit;
1627 if (priv->tx_multicast && link_id &&
1628 !priv->sta_asleep_mask)
1629 queue_work(priv->workqueue,
1630 &priv->multicast_stop_work);
1631 cw1200_bh_wakeup(priv);
1632 }
1633 break;
1634 }
1635 }
1636
1637 void cw1200_sta_notify(struct ieee80211_hw *dev,
1638 struct ieee80211_vif *vif,
1639 enum sta_notify_cmd notify_cmd,
1640 struct ieee80211_sta *sta)
1641 {
1642 struct cw1200_common *priv = dev->priv;
1643 struct cw1200_sta_priv *sta_priv =
1644 (struct cw1200_sta_priv *)&sta->drv_priv;
1645
1646 spin_lock_bh(&priv->ps_state_lock);
1647 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1648 spin_unlock_bh(&priv->ps_state_lock);
1649 }
1650
1651 static void cw1200_ps_notify(struct cw1200_common *priv,
1652 int link_id, bool ps)
1653 {
1654 if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1655 return;
1656
1657 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1658 ps ? "Stop" : "Start",
1659 link_id, priv->sta_asleep_mask);
1660
1661 __cw1200_sta_notify(priv->hw, priv->vif,
1662 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1663 }
1664
1665 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1666 {
1667 struct sk_buff *skb;
1668 struct wsm_update_ie update_ie = {
1669 .what = WSM_UPDATE_IE_BEACON,
1670 .count = 1,
1671 };
1672 u16 tim_offset, tim_length;
1673
1674 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1675
1676 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1677 &tim_offset, &tim_length);
1678 if (!skb) {
1679 if (!__cw1200_flush(priv, true))
1680 wsm_unlock_tx(priv);
1681 return -ENOENT;
1682 }
1683
1684 if (tim_offset && tim_length >= 6) {
1685 /* Ignore DTIM count from mac80211:
1686 * firmware handles DTIM internally.
1687 */
1688 skb->data[tim_offset + 2] = 0;
1689
1690 /* Set/reset aid0 bit */
1691 if (aid0_bit_set)
1692 skb->data[tim_offset + 4] |= 1;
1693 else
1694 skb->data[tim_offset + 4] &= ~1;
1695 }
1696
1697 update_ie.ies = &skb->data[tim_offset];
1698 update_ie.length = tim_length;
1699 wsm_update_ie(priv, &update_ie);
1700
1701 dev_kfree_skb(skb);
1702
1703 return 0;
1704 }
1705
1706 void cw1200_set_tim_work(struct work_struct *work)
1707 {
1708 struct cw1200_common *priv =
1709 container_of(work, struct cw1200_common, set_tim_work);
1710 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1711 }
1712
1713 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1714 bool set)
1715 {
1716 struct cw1200_common *priv = dev->priv;
1717 queue_work(priv->workqueue, &priv->set_tim_work);
1718 return 0;
1719 }
1720
1721 void cw1200_set_cts_work(struct work_struct *work)
1722 {
1723 struct cw1200_common *priv =
1724 container_of(work, struct cw1200_common, set_cts_work);
1725
1726 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1727 struct wsm_update_ie update_ie = {
1728 .what = WSM_UPDATE_IE_BEACON,
1729 .count = 1,
1730 .ies = erp_ie,
1731 .length = 3,
1732 };
1733 u32 erp_info;
1734 __le32 use_cts_prot;
1735 mutex_lock(&priv->conf_mutex);
1736 erp_info = priv->erp_info;
1737 mutex_unlock(&priv->conf_mutex);
1738 use_cts_prot =
1739 erp_info & WLAN_ERP_USE_PROTECTION ?
1740 __cpu_to_le32(1) : 0;
1741
1742 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1743
1744 pr_debug("[STA] ERP information 0x%x\n", erp_info);
1745
1746 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1747 &use_cts_prot, sizeof(use_cts_prot));
1748 wsm_update_ie(priv, &update_ie);
1749
1750 return;
1751 }
1752
1753 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1754 {
1755 struct wsm_override_internal_txrate arg;
1756 int ret = 0;
1757
1758 if (priv->mode == NL80211_IFTYPE_STATION) {
1759 /* Plumb PSPOLL and NULL template */
1760 cw1200_upload_pspoll(priv);
1761 cw1200_upload_null(priv);
1762 cw1200_upload_qosnull(priv);
1763 } else {
1764 return 0;
1765 }
1766
1767 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1768
1769 if (!priv->vif->p2p) {
1770 /* STATION mode */
1771 if (priv->bss_params.operational_rate_set & ~0xF) {
1772 pr_debug("[STA] STA has ERP rates\n");
1773 /* G or BG mode */
1774 arg.internalTxRate = (__ffs(
1775 priv->bss_params.operational_rate_set & ~0xF));
1776 } else {
1777 pr_debug("[STA] STA has non ERP rates\n");
1778 /* B only mode */
1779 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1780 }
1781 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1782 } else {
1783 /* P2P mode */
1784 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1785 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1786 }
1787
1788 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1789 priv->mode,
1790 arg.internalTxRate,
1791 arg.nonErpInternalTxRate);
1792
1793 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1794 &arg, sizeof(arg));
1795
1796 return ret;
1797 }
1798
1799 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1800 struct ieee80211_vif *vif,
1801 struct ieee80211_bss_conf *info,
1802 u32 changed)
1803 {
1804 struct cw1200_common *priv = dev->priv;
1805 bool do_join = false;
1806
1807 mutex_lock(&priv->conf_mutex);
1808
1809 pr_debug("BSS CHANGED: %08x\n", changed);
1810
1811 /* TODO: BSS_CHANGED_QOS */
1812 /* TODO: BSS_CHANGED_TXPOWER */
1813
1814 if (changed & BSS_CHANGED_ARP_FILTER) {
1815 struct wsm_mib_arp_ipv4_filter filter = {0};
1816 int i;
1817
1818 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1819 info->arp_addr_cnt);
1820
1821 /* Currently only one IP address is supported by firmware.
1822 * In case of more IPs arp filtering will be disabled.
1823 */
1824 if (info->arp_addr_cnt > 0 &&
1825 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1826 for (i = 0; i < info->arp_addr_cnt; i++) {
1827 filter.ipv4addrs[i] = info->arp_addr_list[i];
1828 pr_debug("[STA] addr[%d]: 0x%X\n",
1829 i, filter.ipv4addrs[i]);
1830 }
1831 filter.enable = __cpu_to_le32(1);
1832 }
1833
1834 pr_debug("[STA] arp ip filter enable: %d\n",
1835 __le32_to_cpu(filter.enable));
1836
1837 wsm_set_arp_ipv4_filter(priv, &filter);
1838 }
1839
1840 if (changed &
1841 (BSS_CHANGED_BEACON |
1842 BSS_CHANGED_AP_PROBE_RESP |
1843 BSS_CHANGED_BSSID |
1844 BSS_CHANGED_SSID |
1845 BSS_CHANGED_IBSS)) {
1846 pr_debug("BSS_CHANGED_BEACON\n");
1847 priv->beacon_int = info->beacon_int;
1848 cw1200_update_beaconing(priv);
1849 cw1200_upload_beacon(priv);
1850 }
1851
1852 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1853 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1854
1855 if (priv->enable_beacon != info->enable_beacon) {
1856 cw1200_enable_beaconing(priv, info->enable_beacon);
1857 priv->enable_beacon = info->enable_beacon;
1858 }
1859 }
1860
1861 if (changed & BSS_CHANGED_BEACON_INT) {
1862 pr_debug("CHANGED_BEACON_INT\n");
1863 if (info->ibss_joined)
1864 do_join = true;
1865 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1866 cw1200_update_beaconing(priv);
1867 }
1868
1869 /* assoc/disassoc, or maybe AID changed */
1870 if (changed & BSS_CHANGED_ASSOC) {
1871 wsm_lock_tx(priv);
1872 priv->wep_default_key_id = -1;
1873 wsm_unlock_tx(priv);
1874 }
1875
1876 if (changed & BSS_CHANGED_BSSID) {
1877 pr_debug("BSS_CHANGED_BSSID\n");
1878 do_join = true;
1879 }
1880
1881 if (changed &
1882 (BSS_CHANGED_ASSOC |
1883 BSS_CHANGED_BSSID |
1884 BSS_CHANGED_IBSS |
1885 BSS_CHANGED_BASIC_RATES |
1886 BSS_CHANGED_HT)) {
1887 pr_debug("BSS_CHANGED_ASSOC\n");
1888 if (info->assoc) {
1889 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1890 ieee80211_connection_loss(vif);
1891 mutex_unlock(&priv->conf_mutex);
1892 return;
1893 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1894 priv->join_status = CW1200_JOIN_STATUS_STA;
1895 }
1896 } else {
1897 do_join = true;
1898 }
1899
1900 if (info->assoc || info->ibss_joined) {
1901 struct ieee80211_sta *sta = NULL;
1902 __le32 htprot = 0;
1903
1904 if (info->dtim_period)
1905 priv->join_dtim_period = info->dtim_period;
1906 priv->beacon_int = info->beacon_int;
1907
1908 rcu_read_lock();
1909
1910 if (info->bssid && !info->ibss_joined)
1911 sta = ieee80211_find_sta(vif, info->bssid);
1912 if (sta) {
1913 priv->ht_info.ht_cap = sta->ht_cap;
1914 priv->bss_params.operational_rate_set =
1915 cw1200_rate_mask_to_wsm(priv,
1916 sta->supp_rates[priv->channel->band]);
1917 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1918 priv->ht_info.operation_mode = info->ht_operation_mode;
1919 } else {
1920 memset(&priv->ht_info, 0,
1921 sizeof(priv->ht_info));
1922 priv->bss_params.operational_rate_set = -1;
1923 }
1924 rcu_read_unlock();
1925
1926 /* Non Greenfield stations present */
1927 if (priv->ht_info.operation_mode &
1928 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1929 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1930
1931 /* Set HT protection method */
1932 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1933
1934 /* TODO:
1935 * STBC_param.dual_cts
1936 * STBC_param.LSIG_TXOP_FILL
1937 */
1938
1939 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1940 &htprot, sizeof(htprot));
1941
1942 priv->association_mode.greenfield =
1943 cw1200_ht_greenfield(&priv->ht_info);
1944 priv->association_mode.flags =
1945 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1946 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1947 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1948 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1949 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1950 priv->association_mode.preamble =
1951 info->use_short_preamble ?
1952 WSM_JOIN_PREAMBLE_SHORT :
1953 WSM_JOIN_PREAMBLE_LONG;
1954 priv->association_mode.basic_rate_set = __cpu_to_le32(
1955 cw1200_rate_mask_to_wsm(priv,
1956 info->basic_rates));
1957 priv->association_mode.mpdu_start_spacing =
1958 cw1200_ht_ampdu_density(&priv->ht_info);
1959
1960 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1961 cancel_work_sync(&priv->unjoin_work);
1962
1963 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1964 priv->bss_params.aid = info->aid;
1965
1966 if (priv->join_dtim_period < 1)
1967 priv->join_dtim_period = 1;
1968
1969 pr_debug("[STA] DTIM %d, interval: %d\n",
1970 priv->join_dtim_period, priv->beacon_int);
1971 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1972 priv->association_mode.preamble,
1973 priv->association_mode.greenfield,
1974 priv->bss_params.aid,
1975 priv->bss_params.operational_rate_set,
1976 priv->association_mode.basic_rate_set);
1977 wsm_set_association_mode(priv, &priv->association_mode);
1978
1979 if (!info->ibss_joined) {
1980 wsm_keep_alive_period(priv, 30 /* sec */);
1981 wsm_set_bss_params(priv, &priv->bss_params);
1982 priv->setbssparams_done = true;
1983 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1984 cw1200_set_pm(priv, &priv->powersave_mode);
1985 }
1986 if (priv->vif->p2p) {
1987 pr_debug("[STA] Setting p2p powersave configuration.\n");
1988 wsm_set_p2p_ps_modeinfo(priv,
1989 &priv->p2p_ps_modeinfo);
1990 }
1991 if (priv->bt_present)
1992 cw1200_set_btcoexinfo(priv);
1993 } else {
1994 memset(&priv->association_mode, 0,
1995 sizeof(priv->association_mode));
1996 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1997 }
1998 }
1999
2000 /* ERP Protection */
2001 if (changed & (BSS_CHANGED_ASSOC |
2002 BSS_CHANGED_ERP_CTS_PROT |
2003 BSS_CHANGED_ERP_PREAMBLE)) {
2004 u32 prev_erp_info = priv->erp_info;
2005 if (info->use_cts_prot)
2006 priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2007 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2008 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2009
2010 if (info->use_short_preamble)
2011 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2012 else
2013 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2014
2015 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2016
2017 if (prev_erp_info != priv->erp_info)
2018 queue_work(priv->workqueue, &priv->set_cts_work);
2019 }
2020
2021 /* ERP Slottime */
2022 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2023 __le32 slot_time = info->use_short_slot ?
2024 __cpu_to_le32(9) : __cpu_to_le32(20);
2025 pr_debug("[STA] Slot time: %d us.\n",
2026 __le32_to_cpu(slot_time));
2027 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2028 &slot_time, sizeof(slot_time));
2029 }
2030
2031 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2032 struct wsm_rcpi_rssi_threshold threshold = {
2033 .rollingAverageCount = 8,
2034 };
2035 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2036 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2037 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2038 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2039
2040 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2041 /* RSSI subscription enabled */
2042 /* TODO: It's not a correct way of setting threshold.
2043 * Upper and lower must be set equal here and adjusted
2044 * in callback. However current implementation is much
2045 * more relaible and stable.
2046 */
2047
2048 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2049 * RSSI = RCPI / 2 - 110
2050 */
2051 if (priv->cqm_use_rssi) {
2052 threshold.upperThreshold =
2053 info->cqm_rssi_thold + info->cqm_rssi_hyst;
2054 threshold.lowerThreshold =
2055 info->cqm_rssi_thold;
2056 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2057 } else {
2058 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2059 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2060 }
2061 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2062 } else {
2063 /* There is a bug in FW, see sta.c. We have to enable
2064 * dummy subscription to get correct RSSI values.
2065 */
2066 threshold.rssiRcpiMode |=
2067 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2068 WSM_RCPI_RSSI_DONT_USE_UPPER |
2069 WSM_RCPI_RSSI_DONT_USE_LOWER;
2070 if (priv->cqm_use_rssi)
2071 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2072 }
2073 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2074 }
2075 mutex_unlock(&priv->conf_mutex);
2076
2077 if (do_join) {
2078 wsm_lock_tx(priv);
2079 cw1200_do_join(priv); /* Will unlock it for us */
2080 }
2081 }
2082
2083 void cw1200_multicast_start_work(struct work_struct *work)
2084 {
2085 struct cw1200_common *priv =
2086 container_of(work, struct cw1200_common, multicast_start_work);
2087 long tmo = priv->join_dtim_period *
2088 (priv->beacon_int + 20) * HZ / 1024;
2089
2090 cancel_work_sync(&priv->multicast_stop_work);
2091
2092 if (!priv->aid0_bit_set) {
2093 wsm_lock_tx(priv);
2094 cw1200_set_tim_impl(priv, true);
2095 priv->aid0_bit_set = true;
2096 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2097 wsm_unlock_tx(priv);
2098 }
2099 }
2100
2101 void cw1200_multicast_stop_work(struct work_struct *work)
2102 {
2103 struct cw1200_common *priv =
2104 container_of(work, struct cw1200_common, multicast_stop_work);
2105
2106 if (priv->aid0_bit_set) {
2107 del_timer_sync(&priv->mcast_timeout);
2108 wsm_lock_tx(priv);
2109 priv->aid0_bit_set = false;
2110 cw1200_set_tim_impl(priv, false);
2111 wsm_unlock_tx(priv);
2112 }
2113 }
2114
2115 void cw1200_mcast_timeout(unsigned long arg)
2116 {
2117 struct cw1200_common *priv =
2118 (struct cw1200_common *)arg;
2119
2120 wiphy_warn(priv->hw->wiphy,
2121 "Multicast delivery timeout.\n");
2122 spin_lock_bh(&priv->ps_state_lock);
2123 priv->tx_multicast = priv->aid0_bit_set &&
2124 priv->buffered_multicasts;
2125 if (priv->tx_multicast)
2126 cw1200_bh_wakeup(priv);
2127 spin_unlock_bh(&priv->ps_state_lock);
2128 }
2129
2130 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2131 struct ieee80211_vif *vif,
2132 struct ieee80211_ampdu_params *params)
2133 {
2134 /* Aggregation is implemented fully in firmware,
2135 * including block ack negotiation. Do not allow
2136 * mac80211 stack to do anything: it interferes with
2137 * the firmware.
2138 */
2139
2140 /* Note that we still need this function stubbed. */
2141 return -ENOTSUPP;
2142 }
2143
2144 /* ******************************************************************** */
2145 /* WSM callback */
2146 void cw1200_suspend_resume(struct cw1200_common *priv,
2147 struct wsm_suspend_resume *arg)
2148 {
2149 pr_debug("[AP] %s: %s\n",
2150 arg->stop ? "stop" : "start",
2151 arg->multicast ? "broadcast" : "unicast");
2152
2153 if (arg->multicast) {
2154 bool cancel_tmo = false;
2155 spin_lock_bh(&priv->ps_state_lock);
2156 if (arg->stop) {
2157 priv->tx_multicast = false;
2158 } else {
2159 /* Firmware sends this indication every DTIM if there
2160 * is a STA in powersave connected. There is no reason
2161 * to suspend, following wakeup will consume much more
2162 * power than it could be saved.
2163 */
2164 cw1200_pm_stay_awake(&priv->pm_state,
2165 priv->join_dtim_period *
2166 (priv->beacon_int + 20) * HZ / 1024);
2167 priv->tx_multicast = (priv->aid0_bit_set &&
2168 priv->buffered_multicasts);
2169 if (priv->tx_multicast) {
2170 cancel_tmo = true;
2171 cw1200_bh_wakeup(priv);
2172 }
2173 }
2174 spin_unlock_bh(&priv->ps_state_lock);
2175 if (cancel_tmo)
2176 del_timer_sync(&priv->mcast_timeout);
2177 } else {
2178 spin_lock_bh(&priv->ps_state_lock);
2179 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2180 spin_unlock_bh(&priv->ps_state_lock);
2181 if (!arg->stop)
2182 cw1200_bh_wakeup(priv);
2183 }
2184 return;
2185 }
2186
2187 /* ******************************************************************** */
2188 /* AP privates */
2189
2190 static int cw1200_upload_beacon(struct cw1200_common *priv)
2191 {
2192 int ret = 0;
2193 struct ieee80211_mgmt *mgmt;
2194 struct wsm_template_frame frame = {
2195 .frame_type = WSM_FRAME_TYPE_BEACON,
2196 };
2197
2198 u16 tim_offset;
2199 u16 tim_len;
2200
2201 if (priv->mode == NL80211_IFTYPE_STATION ||
2202 priv->mode == NL80211_IFTYPE_MONITOR ||
2203 priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2204 goto done;
2205
2206 if (priv->vif->p2p)
2207 frame.rate = WSM_TRANSMIT_RATE_6;
2208
2209 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2210 &tim_offset, &tim_len);
2211 if (!frame.skb)
2212 return -ENOMEM;
2213
2214 ret = wsm_set_template_frame(priv, &frame);
2215
2216 if (ret)
2217 goto done;
2218
2219 /* TODO: Distill probe resp; remove TIM
2220 * and any other beacon-specific IEs
2221 */
2222 mgmt = (void *)frame.skb->data;
2223 mgmt->frame_control =
2224 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2225 IEEE80211_STYPE_PROBE_RESP);
2226
2227 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2228 if (priv->vif->p2p) {
2229 ret = wsm_set_probe_responder(priv, true);
2230 } else {
2231 ret = wsm_set_template_frame(priv, &frame);
2232 wsm_set_probe_responder(priv, false);
2233 }
2234
2235 done:
2236 dev_kfree_skb(frame.skb);
2237
2238 return ret;
2239 }
2240
2241 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2242 {
2243 int ret = 0;
2244 struct wsm_template_frame frame = {
2245 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2246 .rate = 0xFF,
2247 };
2248
2249
2250 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2251 if (!frame.skb)
2252 return -ENOMEM;
2253
2254 ret = wsm_set_template_frame(priv, &frame);
2255
2256 dev_kfree_skb(frame.skb);
2257
2258 return ret;
2259 }
2260
2261 static int cw1200_upload_null(struct cw1200_common *priv)
2262 {
2263 int ret = 0;
2264 struct wsm_template_frame frame = {
2265 .frame_type = WSM_FRAME_TYPE_NULL,
2266 .rate = 0xFF,
2267 };
2268
2269 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
2270 if (!frame.skb)
2271 return -ENOMEM;
2272
2273 ret = wsm_set_template_frame(priv, &frame);
2274
2275 dev_kfree_skb(frame.skb);
2276
2277 return ret;
2278 }
2279
2280 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2281 {
2282 /* TODO: This needs to be implemented
2283
2284 struct wsm_template_frame frame = {
2285 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2286 .rate = 0xFF,
2287 };
2288
2289 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2290 if (!frame.skb)
2291 return -ENOMEM;
2292
2293 ret = wsm_set_template_frame(priv, &frame);
2294
2295 dev_kfree_skb(frame.skb);
2296
2297 */
2298 return 0;
2299 }
2300
2301 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2302 bool enable)
2303 {
2304 struct wsm_beacon_transmit transmit = {
2305 .enable_beaconing = enable,
2306 };
2307
2308 return wsm_beacon_transmit(priv, &transmit);
2309 }
2310
2311 static int cw1200_start_ap(struct cw1200_common *priv)
2312 {
2313 int ret;
2314 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2315 struct wsm_start start = {
2316 .mode = priv->vif->p2p ?
2317 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2318 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
2319 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2320 .channel_number = priv->channel->hw_value,
2321 .beacon_interval = conf->beacon_int,
2322 .dtim_period = conf->dtim_period,
2323 .preamble = conf->use_short_preamble ?
2324 WSM_JOIN_PREAMBLE_SHORT :
2325 WSM_JOIN_PREAMBLE_LONG,
2326 .probe_delay = 100,
2327 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2328 conf->basic_rates),
2329 };
2330 struct wsm_operational_mode mode = {
2331 .power_mode = cw1200_power_mode,
2332 .disable_more_flag_usage = true,
2333 };
2334
2335 memset(start.ssid, 0, sizeof(start.ssid));
2336 if (!conf->hidden_ssid) {
2337 start.ssid_len = conf->ssid_len;
2338 memcpy(start.ssid, conf->ssid, start.ssid_len);
2339 }
2340
2341 priv->beacon_int = conf->beacon_int;
2342 priv->join_dtim_period = conf->dtim_period;
2343
2344 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2345
2346 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2347 start.channel_number, start.band,
2348 start.beacon_interval, start.dtim_period,
2349 start.basic_rate_set,
2350 start.ssid_len, start.ssid);
2351 ret = wsm_start(priv, &start);
2352 if (!ret)
2353 ret = cw1200_upload_keys(priv);
2354 if (!ret && priv->vif->p2p) {
2355 pr_debug("[AP] Setting p2p powersave configuration.\n");
2356 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2357 }
2358 if (!ret) {
2359 wsm_set_block_ack_policy(priv, 0, 0);
2360 priv->join_status = CW1200_JOIN_STATUS_AP;
2361 cw1200_update_filtering(priv);
2362 }
2363 wsm_set_operational_mode(priv, &mode);
2364 return ret;
2365 }
2366
2367 static int cw1200_update_beaconing(struct cw1200_common *priv)
2368 {
2369 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2370 struct wsm_reset reset = {
2371 .link_id = 0,
2372 .reset_statistics = true,
2373 };
2374
2375 if (priv->mode == NL80211_IFTYPE_AP) {
2376 /* TODO: check if changed channel, band */
2377 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2378 priv->beacon_int != conf->beacon_int) {
2379 pr_debug("ap restarting\n");
2380 wsm_lock_tx(priv);
2381 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2382 wsm_reset(priv, &reset);
2383 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2384 cw1200_start_ap(priv);
2385 wsm_unlock_tx(priv);
2386 } else
2387 pr_debug("ap started join_status: %d\n",
2388 priv->join_status);
2389 }
2390 return 0;
2391 }
Linux with added FPC-III support