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net/xfrm/xfrm_output.c: move EXPORT_SYMBOL
[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 #include <linux/etherdevice.h>
17
18 #include "cw1200.h"
19 #include "sta.h"
20 #include "fwio.h"
21 #include "bh.h"
22 #include "debug.h"
23
24 #ifndef ERP_INFO_BYTE_OFFSET
25 #define ERP_INFO_BYTE_OFFSET 2
26 #endif
27
28 static void cw1200_do_join(struct cw1200_common *priv);
29 static void cw1200_do_unjoin(struct cw1200_common *priv);
30
31 static int cw1200_upload_beacon(struct cw1200_common *priv);
32 static int cw1200_upload_pspoll(struct cw1200_common *priv);
33 static int cw1200_upload_null(struct cw1200_common *priv);
34 static int cw1200_upload_qosnull(struct cw1200_common *priv);
35 static int cw1200_start_ap(struct cw1200_common *priv);
36 static int cw1200_update_beaconing(struct cw1200_common *priv);
37 static int cw1200_enable_beaconing(struct cw1200_common *priv,
38 bool enable);
39 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
40 struct ieee80211_vif *vif,
41 enum sta_notify_cmd notify_cmd,
42 int link_id);
43 static int __cw1200_flush(struct cw1200_common *priv, bool drop);
44
45 static inline void __cw1200_free_event_queue(struct list_head *list)
46 {
47 struct cw1200_wsm_event *event, *tmp;
48 list_for_each_entry_safe(event, tmp, list, link) {
49 list_del(&event->link);
50 kfree(event);
51 }
52 }
53
54 /* ******************************************************************** */
55 /* STA API */
56
57 int cw1200_start(struct ieee80211_hw *dev)
58 {
59 struct cw1200_common *priv = dev->priv;
60 int ret = 0;
61
62 cw1200_pm_stay_awake(&priv->pm_state, HZ);
63
64 mutex_lock(&priv->conf_mutex);
65
66 /* default EDCA */
67 WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
68 WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
69 WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
70 WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
71 ret = wsm_set_edca_params(priv, &priv->edca);
72 if (ret)
73 goto out;
74
75 ret = cw1200_set_uapsd_param(priv, &priv->edca);
76 if (ret)
77 goto out;
78
79 priv->setbssparams_done = false;
80
81 memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
82 priv->mode = NL80211_IFTYPE_MONITOR;
83 priv->wep_default_key_id = -1;
84
85 priv->cqm_beacon_loss_count = 10;
86
87 ret = cw1200_setup_mac(priv);
88 if (ret)
89 goto out;
90
91 out:
92 mutex_unlock(&priv->conf_mutex);
93 return ret;
94 }
95
96 void cw1200_stop(struct ieee80211_hw *dev)
97 {
98 struct cw1200_common *priv = dev->priv;
99 LIST_HEAD(list);
100 int i;
101
102 wsm_lock_tx(priv);
103
104 while (down_trylock(&priv->scan.lock)) {
105 /* Scan is in progress. Force it to stop. */
106 priv->scan.req = NULL;
107 schedule();
108 }
109 up(&priv->scan.lock);
110
111 cancel_delayed_work_sync(&priv->scan.probe_work);
112 cancel_delayed_work_sync(&priv->scan.timeout);
113 cancel_delayed_work_sync(&priv->clear_recent_scan_work);
114 cancel_delayed_work_sync(&priv->join_timeout);
115 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
116 cancel_work_sync(&priv->unjoin_work);
117 cancel_delayed_work_sync(&priv->link_id_gc_work);
118 flush_workqueue(priv->workqueue);
119 del_timer_sync(&priv->mcast_timeout);
120 mutex_lock(&priv->conf_mutex);
121 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
122 priv->listening = false;
123
124 spin_lock(&priv->event_queue_lock);
125 list_splice_init(&priv->event_queue, &list);
126 spin_unlock(&priv->event_queue_lock);
127 __cw1200_free_event_queue(&list);
128
129
130 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
131 priv->join_pending = false;
132
133 for (i = 0; i < 4; i++)
134 cw1200_queue_clear(&priv->tx_queue[i]);
135 mutex_unlock(&priv->conf_mutex);
136 tx_policy_clean(priv);
137
138 /* HACK! */
139 if (atomic_xchg(&priv->tx_lock, 1) != 1)
140 pr_debug("[STA] TX is force-unlocked due to stop request.\n");
141
142 wsm_unlock_tx(priv);
143 atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
144 }
145
146 static int cw1200_bssloss_mitigation = 1;
147 module_param(cw1200_bssloss_mitigation, int, 0644);
148 MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
149
150
151 void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
152 int init, int good, int bad)
153 {
154 int tx = 0;
155
156 priv->delayed_link_loss = 0;
157 cancel_work_sync(&priv->bss_params_work);
158
159 pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
160 priv->bss_loss_state,
161 init, good, bad,
162 atomic_read(&priv->tx_lock),
163 priv->delayed_unjoin);
164
165 /* If we have a pending unjoin */
166 if (priv->delayed_unjoin)
167 return;
168
169 if (init) {
170 queue_delayed_work(priv->workqueue,
171 &priv->bss_loss_work,
172 HZ);
173 priv->bss_loss_state = 0;
174
175 /* Skip the confimration procedure in P2P case */
176 if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
177 tx = 1;
178 } else if (good) {
179 cancel_delayed_work_sync(&priv->bss_loss_work);
180 priv->bss_loss_state = 0;
181 queue_work(priv->workqueue, &priv->bss_params_work);
182 } else if (bad) {
183 /* XXX Should we just keep going until we time out? */
184 if (priv->bss_loss_state < 3)
185 tx = 1;
186 } else {
187 cancel_delayed_work_sync(&priv->bss_loss_work);
188 priv->bss_loss_state = 0;
189 }
190
191 /* Bypass mitigation if it's disabled */
192 if (!cw1200_bssloss_mitigation)
193 tx = 0;
194
195 /* Spit out a NULL packet to our AP if necessary */
196 if (tx) {
197 struct sk_buff *skb;
198
199 priv->bss_loss_state++;
200
201 skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
202 WARN_ON(!skb);
203 if (skb)
204 cw1200_tx(priv->hw, NULL, skb);
205 }
206 }
207
208 int cw1200_add_interface(struct ieee80211_hw *dev,
209 struct ieee80211_vif *vif)
210 {
211 int ret;
212 struct cw1200_common *priv = dev->priv;
213 /* __le32 auto_calibration_mode = __cpu_to_le32(1); */
214
215 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
216 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
217
218 mutex_lock(&priv->conf_mutex);
219
220 if (priv->mode != NL80211_IFTYPE_MONITOR) {
221 mutex_unlock(&priv->conf_mutex);
222 return -EOPNOTSUPP;
223 }
224
225 switch (vif->type) {
226 case NL80211_IFTYPE_STATION:
227 case NL80211_IFTYPE_ADHOC:
228 case NL80211_IFTYPE_MESH_POINT:
229 case NL80211_IFTYPE_AP:
230 priv->mode = vif->type;
231 break;
232 default:
233 mutex_unlock(&priv->conf_mutex);
234 return -EOPNOTSUPP;
235 }
236
237 priv->vif = vif;
238 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
239 ret = cw1200_setup_mac(priv);
240 /* Enable auto-calibration */
241 /* Exception in subsequent channel switch; disabled.
242 * wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
243 * &auto_calibration_mode, sizeof(auto_calibration_mode));
244 */
245
246 mutex_unlock(&priv->conf_mutex);
247 return ret;
248 }
249
250 void cw1200_remove_interface(struct ieee80211_hw *dev,
251 struct ieee80211_vif *vif)
252 {
253 struct cw1200_common *priv = dev->priv;
254 struct wsm_reset reset = {
255 .reset_statistics = true,
256 };
257 int i;
258
259 mutex_lock(&priv->conf_mutex);
260 switch (priv->join_status) {
261 case CW1200_JOIN_STATUS_JOINING:
262 case CW1200_JOIN_STATUS_PRE_STA:
263 case CW1200_JOIN_STATUS_STA:
264 case CW1200_JOIN_STATUS_IBSS:
265 wsm_lock_tx(priv);
266 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
267 wsm_unlock_tx(priv);
268 break;
269 case CW1200_JOIN_STATUS_AP:
270 for (i = 0; priv->link_id_map; ++i) {
271 if (priv->link_id_map & BIT(i)) {
272 reset.link_id = i;
273 wsm_reset(priv, &reset);
274 priv->link_id_map &= ~BIT(i);
275 }
276 }
277 memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
278 priv->sta_asleep_mask = 0;
279 priv->enable_beacon = false;
280 priv->tx_multicast = false;
281 priv->aid0_bit_set = false;
282 priv->buffered_multicasts = false;
283 priv->pspoll_mask = 0;
284 reset.link_id = 0;
285 wsm_reset(priv, &reset);
286 break;
287 case CW1200_JOIN_STATUS_MONITOR:
288 cw1200_update_listening(priv, false);
289 break;
290 default:
291 break;
292 }
293 priv->vif = NULL;
294 priv->mode = NL80211_IFTYPE_MONITOR;
295 memset(priv->mac_addr, 0, ETH_ALEN);
296 memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
297 cw1200_free_keys(priv);
298 cw1200_setup_mac(priv);
299 priv->listening = false;
300 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
301 if (!__cw1200_flush(priv, true))
302 wsm_unlock_tx(priv);
303
304 mutex_unlock(&priv->conf_mutex);
305 }
306
307 int cw1200_change_interface(struct ieee80211_hw *dev,
308 struct ieee80211_vif *vif,
309 enum nl80211_iftype new_type,
310 bool p2p)
311 {
312 int ret = 0;
313 pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
314 p2p, vif->type, vif->p2p);
315
316 if (new_type != vif->type || vif->p2p != p2p) {
317 cw1200_remove_interface(dev, vif);
318 vif->type = new_type;
319 vif->p2p = p2p;
320 ret = cw1200_add_interface(dev, vif);
321 }
322
323 return ret;
324 }
325
326 int cw1200_config(struct ieee80211_hw *dev, u32 changed)
327 {
328 int ret = 0;
329 struct cw1200_common *priv = dev->priv;
330 struct ieee80211_conf *conf = &dev->conf;
331
332 pr_debug("CONFIG CHANGED: %08x\n", changed);
333
334 down(&priv->scan.lock);
335 mutex_lock(&priv->conf_mutex);
336 /* TODO: IEEE80211_CONF_CHANGE_QOS */
337 /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
338
339 if (changed & IEEE80211_CONF_CHANGE_POWER) {
340 priv->output_power = conf->power_level;
341 pr_debug("[STA] TX power: %d\n", priv->output_power);
342 wsm_set_output_power(priv, priv->output_power * 10);
343 }
344
345 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
346 (priv->channel != conf->chandef.chan)) {
347 struct ieee80211_channel *ch = conf->chandef.chan;
348 struct wsm_switch_channel channel = {
349 .channel_number = ch->hw_value,
350 };
351 pr_debug("[STA] Freq %d (wsm ch: %d).\n",
352 ch->center_freq, ch->hw_value);
353
354 /* __cw1200_flush() implicitly locks tx, if successful */
355 if (!__cw1200_flush(priv, false)) {
356 if (!wsm_switch_channel(priv, &channel)) {
357 ret = wait_event_timeout(priv->channel_switch_done,
358 !priv->channel_switch_in_progress,
359 3 * HZ);
360 if (ret) {
361 /* Already unlocks if successful */
362 priv->channel = ch;
363 ret = 0;
364 } else {
365 ret = -ETIMEDOUT;
366 }
367 } else {
368 /* Unlock if switch channel fails */
369 wsm_unlock_tx(priv);
370 }
371 }
372 }
373
374 if (changed & IEEE80211_CONF_CHANGE_PS) {
375 if (!(conf->flags & IEEE80211_CONF_PS))
376 priv->powersave_mode.mode = WSM_PSM_ACTIVE;
377 else if (conf->dynamic_ps_timeout <= 0)
378 priv->powersave_mode.mode = WSM_PSM_PS;
379 else
380 priv->powersave_mode.mode = WSM_PSM_FAST_PS;
381
382 /* Firmware requires that value for this 1-byte field must
383 * be specified in units of 500us. Values above the 128ms
384 * threshold are not supported.
385 */
386 if (conf->dynamic_ps_timeout >= 0x80)
387 priv->powersave_mode.fast_psm_idle_period = 0xFF;
388 else
389 priv->powersave_mode.fast_psm_idle_period =
390 conf->dynamic_ps_timeout << 1;
391
392 if (priv->join_status == CW1200_JOIN_STATUS_STA &&
393 priv->bss_params.aid)
394 cw1200_set_pm(priv, &priv->powersave_mode);
395 }
396
397 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
398 /* TBD: It looks like it's transparent
399 * there's a monitor interface present -- use this
400 * to determine for example whether to calculate
401 * timestamps for packets or not, do not use instead
402 * of filter flags!
403 */
404 }
405
406 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
407 struct wsm_operational_mode mode = {
408 .power_mode = cw1200_power_mode,
409 .disable_more_flag_usage = true,
410 };
411
412 wsm_lock_tx(priv);
413 /* Disable p2p-dev mode forced by TX request */
414 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
415 (conf->flags & IEEE80211_CONF_IDLE) &&
416 !priv->listening) {
417 cw1200_disable_listening(priv);
418 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
419 }
420 wsm_set_operational_mode(priv, &mode);
421 wsm_unlock_tx(priv);
422 }
423
424 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
425 pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
426 conf->long_frame_max_tx_count,
427 conf->short_frame_max_tx_count);
428 spin_lock_bh(&priv->tx_policy_cache.lock);
429 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
430 priv->short_frame_max_tx_count =
431 (conf->short_frame_max_tx_count < 0x0F) ?
432 conf->short_frame_max_tx_count : 0x0F;
433 priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
434 spin_unlock_bh(&priv->tx_policy_cache.lock);
435 }
436 mutex_unlock(&priv->conf_mutex);
437 up(&priv->scan.lock);
438 return ret;
439 }
440
441 void cw1200_update_filtering(struct cw1200_common *priv)
442 {
443 int ret;
444 bool bssid_filtering = !priv->rx_filter.bssid;
445 bool is_p2p = priv->vif && priv->vif->p2p;
446 bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
447
448 static struct wsm_beacon_filter_control bf_ctrl;
449 static struct wsm_mib_beacon_filter_table bf_tbl = {
450 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
451 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
452 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
453 WSM_BEACON_FILTER_IE_HAS_APPEARED,
454 .entry[0].oui[0] = 0x50,
455 .entry[0].oui[1] = 0x6F,
456 .entry[0].oui[2] = 0x9A,
457 .entry[1].ie_id = WLAN_EID_HT_OPERATION,
458 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
459 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
460 WSM_BEACON_FILTER_IE_HAS_APPEARED,
461 .entry[2].ie_id = WLAN_EID_ERP_INFO,
462 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
463 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
464 WSM_BEACON_FILTER_IE_HAS_APPEARED,
465 };
466
467 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
468 return;
469 else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
470 bssid_filtering = false;
471
472 if (priv->disable_beacon_filter) {
473 bf_ctrl.enabled = 0;
474 bf_ctrl.bcn_count = 1;
475 bf_tbl.num = __cpu_to_le32(0);
476 } else if (is_p2p || !is_sta) {
477 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
478 WSM_BEACON_FILTER_AUTO_ERP;
479 bf_ctrl.bcn_count = 0;
480 bf_tbl.num = __cpu_to_le32(2);
481 } else {
482 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
483 bf_ctrl.bcn_count = 0;
484 bf_tbl.num = __cpu_to_le32(3);
485 }
486
487 /* When acting as p2p client being connected to p2p GO, in order to
488 * receive frames from a different p2p device, turn off bssid filter.
489 *
490 * WARNING: FW dependency!
491 * This can only be used with FW WSM371 and its successors.
492 * In that FW version even with bssid filter turned off,
493 * device will block most of the unwanted frames.
494 */
495 if (is_p2p)
496 bssid_filtering = false;
497
498 ret = wsm_set_rx_filter(priv, &priv->rx_filter);
499 if (!ret)
500 ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
501 if (!ret)
502 ret = wsm_beacon_filter_control(priv, &bf_ctrl);
503 if (!ret)
504 ret = wsm_set_bssid_filtering(priv, bssid_filtering);
505 if (!ret)
506 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
507 if (ret)
508 wiphy_err(priv->hw->wiphy,
509 "Update filtering failed: %d.\n", ret);
510 return;
511 }
512
513 void cw1200_update_filtering_work(struct work_struct *work)
514 {
515 struct cw1200_common *priv =
516 container_of(work, struct cw1200_common,
517 update_filtering_work);
518
519 cw1200_update_filtering(priv);
520 }
521
522 void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
523 {
524 struct cw1200_common *priv =
525 container_of(work, struct cw1200_common,
526 set_beacon_wakeup_period_work);
527
528 wsm_set_beacon_wakeup_period(priv,
529 priv->beacon_int * priv->join_dtim_period >
530 MAX_BEACON_SKIP_TIME_MS ? 1 :
531 priv->join_dtim_period, 0);
532 }
533
534 u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
535 struct netdev_hw_addr_list *mc_list)
536 {
537 static u8 broadcast_ipv6[ETH_ALEN] = {
538 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
539 };
540 static u8 broadcast_ipv4[ETH_ALEN] = {
541 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
542 };
543 struct cw1200_common *priv = hw->priv;
544 struct netdev_hw_addr *ha;
545 int count = 0;
546
547 /* Disable multicast filtering */
548 priv->has_multicast_subscription = false;
549 memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
550
551 if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
552 return 0;
553
554 /* Enable if requested */
555 netdev_hw_addr_list_for_each(ha, mc_list) {
556 pr_debug("[STA] multicast: %pM\n", ha->addr);
557 memcpy(&priv->multicast_filter.macaddrs[count],
558 ha->addr, ETH_ALEN);
559 if (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
560 !ether_addr_equal(ha->addr, broadcast_ipv6))
561 priv->has_multicast_subscription = true;
562 count++;
563 }
564
565 if (count) {
566 priv->multicast_filter.enable = __cpu_to_le32(1);
567 priv->multicast_filter.num_addrs = __cpu_to_le32(count);
568 }
569
570 return netdev_hw_addr_list_count(mc_list);
571 }
572
573 void cw1200_configure_filter(struct ieee80211_hw *dev,
574 unsigned int changed_flags,
575 unsigned int *total_flags,
576 u64 multicast)
577 {
578 struct cw1200_common *priv = dev->priv;
579 bool listening = !!(*total_flags &
580 (FIF_PROMISC_IN_BSS |
581 FIF_OTHER_BSS |
582 FIF_BCN_PRBRESP_PROMISC |
583 FIF_PROBE_REQ));
584
585 *total_flags &= FIF_PROMISC_IN_BSS |
586 FIF_OTHER_BSS |
587 FIF_FCSFAIL |
588 FIF_BCN_PRBRESP_PROMISC |
589 FIF_PROBE_REQ;
590
591 down(&priv->scan.lock);
592 mutex_lock(&priv->conf_mutex);
593
594 priv->rx_filter.promiscuous = (*total_flags & FIF_PROMISC_IN_BSS)
595 ? 1 : 0;
596 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
597 FIF_PROBE_REQ)) ? 1 : 0;
598 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
599 priv->disable_beacon_filter = !(*total_flags &
600 (FIF_BCN_PRBRESP_PROMISC |
601 FIF_PROMISC_IN_BSS |
602 FIF_PROBE_REQ));
603 if (priv->listening != listening) {
604 priv->listening = listening;
605 wsm_lock_tx(priv);
606 cw1200_update_listening(priv, listening);
607 wsm_unlock_tx(priv);
608 }
609 cw1200_update_filtering(priv);
610 mutex_unlock(&priv->conf_mutex);
611 up(&priv->scan.lock);
612 }
613
614 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
615 u16 queue, const struct ieee80211_tx_queue_params *params)
616 {
617 struct cw1200_common *priv = dev->priv;
618 int ret = 0;
619 /* To prevent re-applying PM request OID again and again*/
620 bool old_uapsd_flags;
621
622 mutex_lock(&priv->conf_mutex);
623
624 if (queue < dev->queues) {
625 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
626
627 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
628 ret = wsm_set_tx_queue_params(priv,
629 &priv->tx_queue_params.params[queue], queue);
630 if (ret) {
631 ret = -EINVAL;
632 goto out;
633 }
634
635 WSM_EDCA_SET(&priv->edca, queue, params->aifs,
636 params->cw_min, params->cw_max,
637 params->txop, 0xc8,
638 params->uapsd);
639 ret = wsm_set_edca_params(priv, &priv->edca);
640 if (ret) {
641 ret = -EINVAL;
642 goto out;
643 }
644
645 if (priv->mode == NL80211_IFTYPE_STATION) {
646 ret = cw1200_set_uapsd_param(priv, &priv->edca);
647 if (!ret && priv->setbssparams_done &&
648 (priv->join_status == CW1200_JOIN_STATUS_STA) &&
649 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
650 ret = cw1200_set_pm(priv, &priv->powersave_mode);
651 }
652 } else {
653 ret = -EINVAL;
654 }
655
656 out:
657 mutex_unlock(&priv->conf_mutex);
658 return ret;
659 }
660
661 int cw1200_get_stats(struct ieee80211_hw *dev,
662 struct ieee80211_low_level_stats *stats)
663 {
664 struct cw1200_common *priv = dev->priv;
665
666 memcpy(stats, &priv->stats, sizeof(*stats));
667 return 0;
668 }
669
670 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
671 {
672 struct wsm_set_pm pm = *arg;
673
674 if (priv->uapsd_info.uapsd_flags != 0)
675 pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
676
677 if (memcmp(&pm, &priv->firmware_ps_mode,
678 sizeof(struct wsm_set_pm))) {
679 priv->firmware_ps_mode = pm;
680 return wsm_set_pm(priv, &pm);
681 } else {
682 return 0;
683 }
684 }
685
686 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
687 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
688 struct ieee80211_key_conf *key)
689 {
690 int ret = -EOPNOTSUPP;
691 struct cw1200_common *priv = dev->priv;
692 struct ieee80211_key_seq seq;
693
694 mutex_lock(&priv->conf_mutex);
695
696 if (cmd == SET_KEY) {
697 u8 *peer_addr = NULL;
698 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
699 1 : 0;
700 int idx = cw1200_alloc_key(priv);
701 struct wsm_add_key *wsm_key = &priv->keys[idx];
702
703 if (idx < 0) {
704 ret = -EINVAL;
705 goto finally;
706 }
707
708 if (sta)
709 peer_addr = sta->addr;
710
711 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
712
713 switch (key->cipher) {
714 case WLAN_CIPHER_SUITE_WEP40:
715 case WLAN_CIPHER_SUITE_WEP104:
716 if (key->keylen > 16) {
717 cw1200_free_key(priv, idx);
718 ret = -EINVAL;
719 goto finally;
720 }
721
722 if (pairwise) {
723 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
724 memcpy(wsm_key->wep_pairwise.peer,
725 peer_addr, ETH_ALEN);
726 memcpy(wsm_key->wep_pairwise.keydata,
727 &key->key[0], key->keylen);
728 wsm_key->wep_pairwise.keylen = key->keylen;
729 } else {
730 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
731 memcpy(wsm_key->wep_group.keydata,
732 &key->key[0], key->keylen);
733 wsm_key->wep_group.keylen = key->keylen;
734 wsm_key->wep_group.keyid = key->keyidx;
735 }
736 break;
737 case WLAN_CIPHER_SUITE_TKIP:
738 ieee80211_get_key_rx_seq(key, 0, &seq);
739 if (pairwise) {
740 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
741 memcpy(wsm_key->tkip_pairwise.peer,
742 peer_addr, ETH_ALEN);
743 memcpy(wsm_key->tkip_pairwise.keydata,
744 &key->key[0], 16);
745 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
746 &key->key[16], 8);
747 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
748 &key->key[24], 8);
749 } else {
750 size_t mic_offset =
751 (priv->mode == NL80211_IFTYPE_AP) ?
752 16 : 24;
753 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
754 memcpy(wsm_key->tkip_group.keydata,
755 &key->key[0], 16);
756 memcpy(wsm_key->tkip_group.rx_mic_key,
757 &key->key[mic_offset], 8);
758
759 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
760 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
761 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
762 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
763 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
764 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
765 wsm_key->tkip_group.rx_seqnum[6] = 0;
766 wsm_key->tkip_group.rx_seqnum[7] = 0;
767
768 wsm_key->tkip_group.keyid = key->keyidx;
769 }
770 break;
771 case WLAN_CIPHER_SUITE_CCMP:
772 ieee80211_get_key_rx_seq(key, 0, &seq);
773 if (pairwise) {
774 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
775 memcpy(wsm_key->aes_pairwise.peer,
776 peer_addr, ETH_ALEN);
777 memcpy(wsm_key->aes_pairwise.keydata,
778 &key->key[0], 16);
779 } else {
780 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
781 memcpy(wsm_key->aes_group.keydata,
782 &key->key[0], 16);
783
784 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
785 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
786 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
787 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
788 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
789 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
790 wsm_key->aes_group.rx_seqnum[6] = 0;
791 wsm_key->aes_group.rx_seqnum[7] = 0;
792 wsm_key->aes_group.keyid = key->keyidx;
793 }
794 break;
795 case WLAN_CIPHER_SUITE_SMS4:
796 if (pairwise) {
797 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
798 memcpy(wsm_key->wapi_pairwise.peer,
799 peer_addr, ETH_ALEN);
800 memcpy(wsm_key->wapi_pairwise.keydata,
801 &key->key[0], 16);
802 memcpy(wsm_key->wapi_pairwise.mic_key,
803 &key->key[16], 16);
804 wsm_key->wapi_pairwise.keyid = key->keyidx;
805 } else {
806 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
807 memcpy(wsm_key->wapi_group.keydata,
808 &key->key[0], 16);
809 memcpy(wsm_key->wapi_group.mic_key,
810 &key->key[16], 16);
811 wsm_key->wapi_group.keyid = key->keyidx;
812 }
813 break;
814 default:
815 pr_warn("Unhandled key type %d\n", key->cipher);
816 cw1200_free_key(priv, idx);
817 ret = -EOPNOTSUPP;
818 goto finally;
819 }
820 ret = wsm_add_key(priv, wsm_key);
821 if (!ret)
822 key->hw_key_idx = idx;
823 else
824 cw1200_free_key(priv, idx);
825 } else if (cmd == DISABLE_KEY) {
826 struct wsm_remove_key wsm_key = {
827 .index = key->hw_key_idx,
828 };
829
830 if (wsm_key.index > WSM_KEY_MAX_INDEX) {
831 ret = -EINVAL;
832 goto finally;
833 }
834
835 cw1200_free_key(priv, wsm_key.index);
836 ret = wsm_remove_key(priv, &wsm_key);
837 } else {
838 pr_warn("Unhandled key command %d\n", cmd);
839 }
840
841 finally:
842 mutex_unlock(&priv->conf_mutex);
843 return ret;
844 }
845
846 void cw1200_wep_key_work(struct work_struct *work)
847 {
848 struct cw1200_common *priv =
849 container_of(work, struct cw1200_common, wep_key_work);
850 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
851 struct cw1200_queue *queue = &priv->tx_queue[queue_id];
852 __le32 wep_default_key_id = __cpu_to_le32(
853 priv->wep_default_key_id);
854
855 pr_debug("[STA] Setting default WEP key: %d\n",
856 priv->wep_default_key_id);
857 wsm_flush_tx(priv);
858 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
859 &wep_default_key_id, sizeof(wep_default_key_id));
860 cw1200_queue_requeue(queue, priv->pending_frame_id);
861 wsm_unlock_tx(priv);
862 }
863
864 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
865 {
866 int ret = 0;
867 __le32 val32;
868 struct cw1200_common *priv = hw->priv;
869
870 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
871 return 0;
872
873 if (value != (u32) -1)
874 val32 = __cpu_to_le32(value);
875 else
876 val32 = 0; /* disabled */
877
878 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
879 /* device is down, can _not_ set threshold */
880 ret = -ENODEV;
881 goto out;
882 }
883
884 if (priv->rts_threshold == value)
885 goto out;
886
887 pr_debug("[STA] Setting RTS threshold: %d\n",
888 priv->rts_threshold);
889
890 /* mutex_lock(&priv->conf_mutex); */
891 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
892 &val32, sizeof(val32));
893 if (!ret)
894 priv->rts_threshold = value;
895 /* mutex_unlock(&priv->conf_mutex); */
896
897 out:
898 return ret;
899 }
900
901 /* If successful, LOCKS the TX queue! */
902 static int __cw1200_flush(struct cw1200_common *priv, bool drop)
903 {
904 int i, ret;
905
906 for (;;) {
907 /* TODO: correct flush handling is required when dev_stop.
908 * Temporary workaround: 2s
909 */
910 if (drop) {
911 for (i = 0; i < 4; ++i)
912 cw1200_queue_clear(&priv->tx_queue[i]);
913 } else {
914 ret = wait_event_timeout(
915 priv->tx_queue_stats.wait_link_id_empty,
916 cw1200_queue_stats_is_empty(
917 &priv->tx_queue_stats, -1),
918 2 * HZ);
919 }
920
921 if (!drop && ret <= 0) {
922 ret = -ETIMEDOUT;
923 break;
924 } else {
925 ret = 0;
926 }
927
928 wsm_lock_tx(priv);
929 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
930 /* Highly unlikely: WSM requeued frames. */
931 wsm_unlock_tx(priv);
932 continue;
933 }
934 break;
935 }
936 return ret;
937 }
938
939 void cw1200_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
940 {
941 struct cw1200_common *priv = hw->priv;
942
943 switch (priv->mode) {
944 case NL80211_IFTYPE_MONITOR:
945 drop = true;
946 break;
947 case NL80211_IFTYPE_AP:
948 if (!priv->enable_beacon)
949 drop = true;
950 break;
951 }
952
953 if (!__cw1200_flush(priv, drop))
954 wsm_unlock_tx(priv);
955
956 return;
957 }
958
959 /* ******************************************************************** */
960 /* WSM callbacks */
961
962 void cw1200_free_event_queue(struct cw1200_common *priv)
963 {
964 LIST_HEAD(list);
965
966 spin_lock(&priv->event_queue_lock);
967 list_splice_init(&priv->event_queue, &list);
968 spin_unlock(&priv->event_queue_lock);
969
970 __cw1200_free_event_queue(&list);
971 }
972
973 void cw1200_event_handler(struct work_struct *work)
974 {
975 struct cw1200_common *priv =
976 container_of(work, struct cw1200_common, event_handler);
977 struct cw1200_wsm_event *event;
978 LIST_HEAD(list);
979
980 spin_lock(&priv->event_queue_lock);
981 list_splice_init(&priv->event_queue, &list);
982 spin_unlock(&priv->event_queue_lock);
983
984 list_for_each_entry(event, &list, link) {
985 switch (event->evt.id) {
986 case WSM_EVENT_ERROR:
987 pr_err("Unhandled WSM Error from LMAC\n");
988 break;
989 case WSM_EVENT_BSS_LOST:
990 pr_debug("[CQM] BSS lost.\n");
991 cancel_work_sync(&priv->unjoin_work);
992 if (!down_trylock(&priv->scan.lock)) {
993 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
994 up(&priv->scan.lock);
995 } else {
996 /* Scan is in progress. Delay reporting.
997 * Scan complete will trigger bss_loss_work
998 */
999 priv->delayed_link_loss = 1;
1000 /* Also start a watchdog. */
1001 queue_delayed_work(priv->workqueue,
1002 &priv->bss_loss_work, 5*HZ);
1003 }
1004 break;
1005 case WSM_EVENT_BSS_REGAINED:
1006 pr_debug("[CQM] BSS regained.\n");
1007 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1008 cancel_work_sync(&priv->unjoin_work);
1009 break;
1010 case WSM_EVENT_RADAR_DETECTED:
1011 wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1012 break;
1013 case WSM_EVENT_RCPI_RSSI:
1014 {
1015 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1016 * RSSI = RCPI / 2 - 110
1017 */
1018 int rcpi_rssi = (int)(event->evt.data & 0xFF);
1019 int cqm_evt;
1020 if (priv->cqm_use_rssi)
1021 rcpi_rssi = (s8)rcpi_rssi;
1022 else
1023 rcpi_rssi = rcpi_rssi / 2 - 110;
1024
1025 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1026 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1027 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1028 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1029 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
1030 GFP_KERNEL);
1031 break;
1032 }
1033 case WSM_EVENT_BT_INACTIVE:
1034 pr_warn("Unhandled BT INACTIVE from LMAC\n");
1035 break;
1036 case WSM_EVENT_BT_ACTIVE:
1037 pr_warn("Unhandled BT ACTIVE from LMAC\n");
1038 break;
1039 }
1040 }
1041 __cw1200_free_event_queue(&list);
1042 }
1043
1044 void cw1200_bss_loss_work(struct work_struct *work)
1045 {
1046 struct cw1200_common *priv =
1047 container_of(work, struct cw1200_common, bss_loss_work.work);
1048
1049 pr_debug("[CQM] Reporting connection loss.\n");
1050 wsm_lock_tx(priv);
1051 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1052 wsm_unlock_tx(priv);
1053 }
1054
1055 void cw1200_bss_params_work(struct work_struct *work)
1056 {
1057 struct cw1200_common *priv =
1058 container_of(work, struct cw1200_common, bss_params_work);
1059 mutex_lock(&priv->conf_mutex);
1060
1061 priv->bss_params.reset_beacon_loss = 1;
1062 wsm_set_bss_params(priv, &priv->bss_params);
1063 priv->bss_params.reset_beacon_loss = 0;
1064
1065 mutex_unlock(&priv->conf_mutex);
1066 }
1067
1068 /* ******************************************************************** */
1069 /* Internal API */
1070
1071 /* This function is called to Parse the SDD file
1072 * to extract listen_interval and PTA related information
1073 * sdd is a TLV: u8 id, u8 len, u8 data[]
1074 */
1075 static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1076 {
1077 const u8 *p = priv->sdd->data;
1078 int ret = 0;
1079
1080 while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1081 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1082 pr_warn("Malformed sdd structure\n");
1083 return -1;
1084 }
1085 switch (p[0]) {
1086 case SDD_PTA_CFG_ELT_ID: {
1087 u16 v;
1088 if (p[1] < 4) {
1089 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1090 ret = -1;
1091 break;
1092 }
1093 v = le16_to_cpu(*((__le16 *)(p + 2)));
1094 if (!v) /* non-zero means this is enabled */
1095 break;
1096
1097 v = le16_to_cpu(*((__le16 *)(p + 4)));
1098 priv->conf_listen_interval = (v >> 7) & 0x1F;
1099 pr_debug("PTA found; Listen Interval %d\n",
1100 priv->conf_listen_interval);
1101 break;
1102 }
1103 case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1104 u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1105 if (clk != priv->hw_refclk)
1106 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1107 clk, priv->hw_refclk);
1108 break;
1109 }
1110 default:
1111 break;
1112 }
1113 p += p[1] + 2;
1114 }
1115
1116 if (!priv->bt_present) {
1117 pr_debug("PTA element NOT found.\n");
1118 priv->conf_listen_interval = 0;
1119 }
1120 return ret;
1121 }
1122
1123 int cw1200_setup_mac(struct cw1200_common *priv)
1124 {
1125 int ret = 0;
1126
1127 /* NOTE: There is a bug in FW: it reports signal
1128 * as RSSI if RSSI subscription is enabled.
1129 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1130 *
1131 * NOTE2: RSSI based reports have been switched to RCPI, since
1132 * FW has a bug and RSSI reported values are not stable,
1133 * what can leads to signal level oscilations in user-end applications
1134 */
1135 struct wsm_rcpi_rssi_threshold threshold = {
1136 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1137 WSM_RCPI_RSSI_DONT_USE_UPPER |
1138 WSM_RCPI_RSSI_DONT_USE_LOWER,
1139 .rollingAverageCount = 16,
1140 };
1141
1142 struct wsm_configuration cfg = {
1143 .dot11StationId = &priv->mac_addr[0],
1144 };
1145
1146 /* Remember the decission here to make sure, we will handle
1147 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1148 */
1149 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1150 priv->cqm_use_rssi = true;
1151
1152 if (!priv->sdd) {
1153 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1154 if (ret) {
1155 pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1156 return ret;
1157 }
1158 cw1200_parse_sdd_file(priv);
1159 }
1160
1161 cfg.dpdData = priv->sdd->data;
1162 cfg.dpdData_size = priv->sdd->size;
1163 ret = wsm_configuration(priv, &cfg);
1164 if (ret)
1165 return ret;
1166
1167 /* Configure RSSI/SCPI reporting as RSSI. */
1168 wsm_set_rcpi_rssi_threshold(priv, &threshold);
1169
1170 return 0;
1171 }
1172
1173 static void cw1200_join_complete(struct cw1200_common *priv)
1174 {
1175 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1176
1177 priv->join_pending = false;
1178 if (priv->join_complete_status) {
1179 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1180 cw1200_update_listening(priv, priv->listening);
1181 cw1200_do_unjoin(priv);
1182 ieee80211_connection_loss(priv->vif);
1183 } else {
1184 if (priv->mode == NL80211_IFTYPE_ADHOC)
1185 priv->join_status = CW1200_JOIN_STATUS_IBSS;
1186 else
1187 priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1188 }
1189 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1190 }
1191
1192 void cw1200_join_complete_work(struct work_struct *work)
1193 {
1194 struct cw1200_common *priv =
1195 container_of(work, struct cw1200_common, join_complete_work);
1196 mutex_lock(&priv->conf_mutex);
1197 cw1200_join_complete(priv);
1198 mutex_unlock(&priv->conf_mutex);
1199 }
1200
1201 void cw1200_join_complete_cb(struct cw1200_common *priv,
1202 struct wsm_join_complete *arg)
1203 {
1204 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1205 arg->status);
1206
1207 if (cancel_delayed_work(&priv->join_timeout)) {
1208 priv->join_complete_status = arg->status;
1209 queue_work(priv->workqueue, &priv->join_complete_work);
1210 }
1211 }
1212
1213 /* MUST be called with tx_lock held! It will be unlocked for us. */
1214 static void cw1200_do_join(struct cw1200_common *priv)
1215 {
1216 const u8 *bssid;
1217 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1218 struct cfg80211_bss *bss = NULL;
1219 struct wsm_protected_mgmt_policy mgmt_policy;
1220 struct wsm_join join = {
1221 .mode = conf->ibss_joined ?
1222 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1223 .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1224 .probe_for_join = 1,
1225 .atim_window = 0,
1226 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1227 conf->basic_rates),
1228 };
1229 if (delayed_work_pending(&priv->join_timeout)) {
1230 pr_warn("[STA] - Join request already pending, skipping..\n");
1231 wsm_unlock_tx(priv);
1232 return;
1233 }
1234
1235 if (priv->join_status)
1236 cw1200_do_unjoin(priv);
1237
1238 bssid = priv->vif->bss_conf.bssid;
1239
1240 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel,
1241 bssid, NULL, 0, 0, 0);
1242
1243 if (!bss && !conf->ibss_joined) {
1244 wsm_unlock_tx(priv);
1245 return;
1246 }
1247
1248 mutex_lock(&priv->conf_mutex);
1249
1250 /* Under the conf lock: check scan status and
1251 * bail out if it is in progress.
1252 */
1253 if (atomic_read(&priv->scan.in_progress)) {
1254 wsm_unlock_tx(priv);
1255 goto done_put;
1256 }
1257
1258 priv->join_pending = true;
1259
1260 /* Sanity check basic rates */
1261 if (!join.basic_rate_set)
1262 join.basic_rate_set = 7;
1263
1264 /* Sanity check beacon interval */
1265 if (!priv->beacon_int)
1266 priv->beacon_int = 1;
1267
1268 join.beacon_interval = priv->beacon_int;
1269
1270 /* BT Coex related changes */
1271 if (priv->bt_present) {
1272 if (((priv->conf_listen_interval * 100) %
1273 priv->beacon_int) == 0)
1274 priv->listen_interval =
1275 ((priv->conf_listen_interval * 100) /
1276 priv->beacon_int);
1277 else
1278 priv->listen_interval =
1279 ((priv->conf_listen_interval * 100) /
1280 priv->beacon_int + 1);
1281 }
1282
1283 if (priv->hw->conf.ps_dtim_period)
1284 priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1285 join.dtim_period = priv->join_dtim_period;
1286
1287 join.channel_number = priv->channel->hw_value;
1288 join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
1289 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1290
1291 memcpy(join.bssid, bssid, sizeof(join.bssid));
1292
1293 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1294 join.bssid,
1295 join.dtim_period, priv->beacon_int);
1296
1297 if (!conf->ibss_joined) {
1298 const u8 *ssidie;
1299 rcu_read_lock();
1300 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1301 if (ssidie) {
1302 join.ssid_len = ssidie[1];
1303 memcpy(join.ssid, &ssidie[2], join.ssid_len);
1304 }
1305 rcu_read_unlock();
1306 }
1307
1308 if (priv->vif->p2p) {
1309 join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1310 join.basic_rate_set =
1311 cw1200_rate_mask_to_wsm(priv, 0xFF0);
1312 }
1313
1314 /* Enable asynchronous join calls */
1315 if (!conf->ibss_joined) {
1316 join.flags |= WSM_JOIN_FLAGS_FORCE;
1317 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1318 }
1319
1320 wsm_flush_tx(priv);
1321
1322 /* Stay Awake for Join and Auth Timeouts and a bit more */
1323 cw1200_pm_stay_awake(&priv->pm_state,
1324 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1325
1326 cw1200_update_listening(priv, false);
1327
1328 /* Turn on Block ACKs */
1329 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1330 priv->ba_rx_tid_mask);
1331
1332 /* Set up timeout */
1333 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1334 priv->join_status = CW1200_JOIN_STATUS_JOINING;
1335 queue_delayed_work(priv->workqueue,
1336 &priv->join_timeout,
1337 CW1200_JOIN_TIMEOUT);
1338 }
1339
1340 /* 802.11w protected mgmt frames */
1341 mgmt_policy.protectedMgmtEnable = 0;
1342 mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1343 mgmt_policy.encryptionForAuthFrame = 1;
1344 wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1345
1346 /* Perform actual join */
1347 if (wsm_join(priv, &join)) {
1348 pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1349 cancel_delayed_work_sync(&priv->join_timeout);
1350 cw1200_update_listening(priv, priv->listening);
1351 /* Tx lock still held, unjoin will clear it. */
1352 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1353 wsm_unlock_tx(priv);
1354 } else {
1355 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1356 cw1200_join_complete(priv); /* Will clear tx_lock */
1357
1358 /* Upload keys */
1359 cw1200_upload_keys(priv);
1360
1361 /* Due to beacon filtering it is possible that the
1362 * AP's beacon is not known for the mac80211 stack.
1363 * Disable filtering temporary to make sure the stack
1364 * receives at least one
1365 */
1366 priv->disable_beacon_filter = true;
1367 }
1368 cw1200_update_filtering(priv);
1369
1370 done_put:
1371 mutex_unlock(&priv->conf_mutex);
1372 if (bss)
1373 cfg80211_put_bss(priv->hw->wiphy, bss);
1374 }
1375
1376 void cw1200_join_timeout(struct work_struct *work)
1377 {
1378 struct cw1200_common *priv =
1379 container_of(work, struct cw1200_common, join_timeout.work);
1380 pr_debug("[WSM] Join timed out.\n");
1381 wsm_lock_tx(priv);
1382 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1383 wsm_unlock_tx(priv);
1384 }
1385
1386 static void cw1200_do_unjoin(struct cw1200_common *priv)
1387 {
1388 struct wsm_reset reset = {
1389 .reset_statistics = true,
1390 };
1391
1392 cancel_delayed_work_sync(&priv->join_timeout);
1393
1394 mutex_lock(&priv->conf_mutex);
1395 priv->join_pending = false;
1396
1397 if (atomic_read(&priv->scan.in_progress)) {
1398 if (priv->delayed_unjoin)
1399 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1400 else
1401 priv->delayed_unjoin = true;
1402 goto done;
1403 }
1404
1405 priv->delayed_link_loss = false;
1406
1407 if (!priv->join_status)
1408 goto done;
1409
1410 if (priv->join_status == CW1200_JOIN_STATUS_AP)
1411 goto done;
1412
1413 cancel_work_sync(&priv->update_filtering_work);
1414 cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1415 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1416
1417 /* Unjoin is a reset. */
1418 wsm_flush_tx(priv);
1419 wsm_keep_alive_period(priv, 0);
1420 wsm_reset(priv, &reset);
1421 wsm_set_output_power(priv, priv->output_power * 10);
1422 priv->join_dtim_period = 0;
1423 cw1200_setup_mac(priv);
1424 cw1200_free_event_queue(priv);
1425 cancel_work_sync(&priv->event_handler);
1426 cw1200_update_listening(priv, priv->listening);
1427 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1428
1429 /* Disable Block ACKs */
1430 wsm_set_block_ack_policy(priv, 0, 0);
1431
1432 priv->disable_beacon_filter = false;
1433 cw1200_update_filtering(priv);
1434 memset(&priv->association_mode, 0,
1435 sizeof(priv->association_mode));
1436 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1437 priv->setbssparams_done = false;
1438 memset(&priv->firmware_ps_mode, 0,
1439 sizeof(priv->firmware_ps_mode));
1440
1441 pr_debug("[STA] Unjoin completed.\n");
1442
1443 done:
1444 mutex_unlock(&priv->conf_mutex);
1445 }
1446
1447 void cw1200_unjoin_work(struct work_struct *work)
1448 {
1449 struct cw1200_common *priv =
1450 container_of(work, struct cw1200_common, unjoin_work);
1451
1452 cw1200_do_unjoin(priv);
1453
1454 /* Tell the stack we're dead */
1455 ieee80211_connection_loss(priv->vif);
1456
1457 wsm_unlock_tx(priv);
1458 }
1459
1460 int cw1200_enable_listening(struct cw1200_common *priv)
1461 {
1462 struct wsm_start start = {
1463 .mode = WSM_START_MODE_P2P_DEV,
1464 .band = WSM_PHY_BAND_2_4G,
1465 .beacon_interval = 100,
1466 .dtim_period = 1,
1467 .probe_delay = 0,
1468 .basic_rate_set = 0x0F,
1469 };
1470
1471 if (priv->channel) {
1472 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
1473 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1474 start.channel_number = priv->channel->hw_value;
1475 } else {
1476 start.band = WSM_PHY_BAND_2_4G;
1477 start.channel_number = 1;
1478 }
1479
1480 return wsm_start(priv, &start);
1481 }
1482
1483 int cw1200_disable_listening(struct cw1200_common *priv)
1484 {
1485 int ret;
1486 struct wsm_reset reset = {
1487 .reset_statistics = true,
1488 };
1489 ret = wsm_reset(priv, &reset);
1490 return ret;
1491 }
1492
1493 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1494 {
1495 if (enabled) {
1496 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1497 if (!cw1200_enable_listening(priv))
1498 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1499 wsm_set_probe_responder(priv, true);
1500 }
1501 } else {
1502 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1503 if (!cw1200_disable_listening(priv))
1504 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1505 wsm_set_probe_responder(priv, false);
1506 }
1507 }
1508 }
1509
1510 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1511 const struct wsm_edca_params *arg)
1512 {
1513 int ret;
1514 u16 uapsd_flags = 0;
1515
1516 /* Here's the mapping AC [queue, bit]
1517 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1518 */
1519
1520 if (arg->uapsd_enable[0])
1521 uapsd_flags |= 1 << 3;
1522
1523 if (arg->uapsd_enable[1])
1524 uapsd_flags |= 1 << 2;
1525
1526 if (arg->uapsd_enable[2])
1527 uapsd_flags |= 1 << 1;
1528
1529 if (arg->uapsd_enable[3])
1530 uapsd_flags |= 1;
1531
1532 /* Currently pseudo U-APSD operation is not supported, so setting
1533 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1534 * AutoTriggerStep to 0
1535 */
1536
1537 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1538 priv->uapsd_info.min_auto_trigger_interval = 0;
1539 priv->uapsd_info.max_auto_trigger_interval = 0;
1540 priv->uapsd_info.auto_trigger_step = 0;
1541
1542 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1543 return ret;
1544 }
1545
1546 /* ******************************************************************** */
1547 /* AP API */
1548
1549 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1550 struct ieee80211_sta *sta)
1551 {
1552 struct cw1200_common *priv = hw->priv;
1553 struct cw1200_sta_priv *sta_priv =
1554 (struct cw1200_sta_priv *)&sta->drv_priv;
1555 struct cw1200_link_entry *entry;
1556 struct sk_buff *skb;
1557
1558 if (priv->mode != NL80211_IFTYPE_AP)
1559 return 0;
1560
1561 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1562 if (WARN_ON(!sta_priv->link_id)) {
1563 wiphy_info(priv->hw->wiphy,
1564 "[AP] No more link IDs available.\n");
1565 return -ENOENT;
1566 }
1567
1568 entry = &priv->link_id_db[sta_priv->link_id - 1];
1569 spin_lock_bh(&priv->ps_state_lock);
1570 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1571 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1572 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1573 entry->status = CW1200_LINK_HARD;
1574 while ((skb = skb_dequeue(&entry->rx_queue)))
1575 ieee80211_rx_irqsafe(priv->hw, skb);
1576 spin_unlock_bh(&priv->ps_state_lock);
1577 return 0;
1578 }
1579
1580 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1581 struct ieee80211_sta *sta)
1582 {
1583 struct cw1200_common *priv = hw->priv;
1584 struct cw1200_sta_priv *sta_priv =
1585 (struct cw1200_sta_priv *)&sta->drv_priv;
1586 struct cw1200_link_entry *entry;
1587
1588 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1589 return 0;
1590
1591 entry = &priv->link_id_db[sta_priv->link_id - 1];
1592 spin_lock_bh(&priv->ps_state_lock);
1593 entry->status = CW1200_LINK_RESERVE;
1594 entry->timestamp = jiffies;
1595 wsm_lock_tx_async(priv);
1596 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1597 wsm_unlock_tx(priv);
1598 spin_unlock_bh(&priv->ps_state_lock);
1599 flush_workqueue(priv->workqueue);
1600 return 0;
1601 }
1602
1603 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1604 struct ieee80211_vif *vif,
1605 enum sta_notify_cmd notify_cmd,
1606 int link_id)
1607 {
1608 struct cw1200_common *priv = dev->priv;
1609 u32 bit, prev;
1610
1611 /* Zero link id means "for all link IDs" */
1612 if (link_id)
1613 bit = BIT(link_id);
1614 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1615 bit = 0;
1616 else
1617 bit = priv->link_id_map;
1618 prev = priv->sta_asleep_mask & bit;
1619
1620 switch (notify_cmd) {
1621 case STA_NOTIFY_SLEEP:
1622 if (!prev) {
1623 if (priv->buffered_multicasts &&
1624 !priv->sta_asleep_mask)
1625 queue_work(priv->workqueue,
1626 &priv->multicast_start_work);
1627 priv->sta_asleep_mask |= bit;
1628 }
1629 break;
1630 case STA_NOTIFY_AWAKE:
1631 if (prev) {
1632 priv->sta_asleep_mask &= ~bit;
1633 priv->pspoll_mask &= ~bit;
1634 if (priv->tx_multicast && link_id &&
1635 !priv->sta_asleep_mask)
1636 queue_work(priv->workqueue,
1637 &priv->multicast_stop_work);
1638 cw1200_bh_wakeup(priv);
1639 }
1640 break;
1641 }
1642 }
1643
1644 void cw1200_sta_notify(struct ieee80211_hw *dev,
1645 struct ieee80211_vif *vif,
1646 enum sta_notify_cmd notify_cmd,
1647 struct ieee80211_sta *sta)
1648 {
1649 struct cw1200_common *priv = dev->priv;
1650 struct cw1200_sta_priv *sta_priv =
1651 (struct cw1200_sta_priv *)&sta->drv_priv;
1652
1653 spin_lock_bh(&priv->ps_state_lock);
1654 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1655 spin_unlock_bh(&priv->ps_state_lock);
1656 }
1657
1658 static void cw1200_ps_notify(struct cw1200_common *priv,
1659 int link_id, bool ps)
1660 {
1661 if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1662 return;
1663
1664 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1665 ps ? "Stop" : "Start",
1666 link_id, priv->sta_asleep_mask);
1667
1668 __cw1200_sta_notify(priv->hw, priv->vif,
1669 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1670 }
1671
1672 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1673 {
1674 struct sk_buff *skb;
1675 struct wsm_update_ie update_ie = {
1676 .what = WSM_UPDATE_IE_BEACON,
1677 .count = 1,
1678 };
1679 u16 tim_offset, tim_length;
1680
1681 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1682
1683 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1684 &tim_offset, &tim_length);
1685 if (!skb) {
1686 if (!__cw1200_flush(priv, true))
1687 wsm_unlock_tx(priv);
1688 return -ENOENT;
1689 }
1690
1691 if (tim_offset && tim_length >= 6) {
1692 /* Ignore DTIM count from mac80211:
1693 * firmware handles DTIM internally.
1694 */
1695 skb->data[tim_offset + 2] = 0;
1696
1697 /* Set/reset aid0 bit */
1698 if (aid0_bit_set)
1699 skb->data[tim_offset + 4] |= 1;
1700 else
1701 skb->data[tim_offset + 4] &= ~1;
1702 }
1703
1704 update_ie.ies = &skb->data[tim_offset];
1705 update_ie.length = tim_length;
1706 wsm_update_ie(priv, &update_ie);
1707
1708 dev_kfree_skb(skb);
1709
1710 return 0;
1711 }
1712
1713 void cw1200_set_tim_work(struct work_struct *work)
1714 {
1715 struct cw1200_common *priv =
1716 container_of(work, struct cw1200_common, set_tim_work);
1717 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1718 }
1719
1720 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1721 bool set)
1722 {
1723 struct cw1200_common *priv = dev->priv;
1724 queue_work(priv->workqueue, &priv->set_tim_work);
1725 return 0;
1726 }
1727
1728 void cw1200_set_cts_work(struct work_struct *work)
1729 {
1730 struct cw1200_common *priv =
1731 container_of(work, struct cw1200_common, set_cts_work);
1732
1733 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1734 struct wsm_update_ie update_ie = {
1735 .what = WSM_UPDATE_IE_BEACON,
1736 .count = 1,
1737 .ies = erp_ie,
1738 .length = 3,
1739 };
1740 u32 erp_info;
1741 __le32 use_cts_prot;
1742 mutex_lock(&priv->conf_mutex);
1743 erp_info = priv->erp_info;
1744 mutex_unlock(&priv->conf_mutex);
1745 use_cts_prot =
1746 erp_info & WLAN_ERP_USE_PROTECTION ?
1747 __cpu_to_le32(1) : 0;
1748
1749 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1750
1751 pr_debug("[STA] ERP information 0x%x\n", erp_info);
1752
1753 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1754 &use_cts_prot, sizeof(use_cts_prot));
1755 wsm_update_ie(priv, &update_ie);
1756
1757 return;
1758 }
1759
1760 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1761 {
1762 struct wsm_override_internal_txrate arg;
1763 int ret = 0;
1764
1765 if (priv->mode == NL80211_IFTYPE_STATION) {
1766 /* Plumb PSPOLL and NULL template */
1767 cw1200_upload_pspoll(priv);
1768 cw1200_upload_null(priv);
1769 cw1200_upload_qosnull(priv);
1770 } else {
1771 return 0;
1772 }
1773
1774 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1775
1776 if (!priv->vif->p2p) {
1777 /* STATION mode */
1778 if (priv->bss_params.operational_rate_set & ~0xF) {
1779 pr_debug("[STA] STA has ERP rates\n");
1780 /* G or BG mode */
1781 arg.internalTxRate = (__ffs(
1782 priv->bss_params.operational_rate_set & ~0xF));
1783 } else {
1784 pr_debug("[STA] STA has non ERP rates\n");
1785 /* B only mode */
1786 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1787 }
1788 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1789 } else {
1790 /* P2P mode */
1791 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1792 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1793 }
1794
1795 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1796 priv->mode,
1797 arg.internalTxRate,
1798 arg.nonErpInternalTxRate);
1799
1800 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1801 &arg, sizeof(arg));
1802
1803 return ret;
1804 }
1805
1806 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1807 struct ieee80211_vif *vif,
1808 struct ieee80211_bss_conf *info,
1809 u32 changed)
1810 {
1811 struct cw1200_common *priv = dev->priv;
1812 bool do_join = false;
1813
1814 mutex_lock(&priv->conf_mutex);
1815
1816 pr_debug("BSS CHANGED: %08x\n", changed);
1817
1818 /* TODO: BSS_CHANGED_QOS */
1819 /* TODO: BSS_CHANGED_TXPOWER */
1820
1821 if (changed & BSS_CHANGED_ARP_FILTER) {
1822 struct wsm_mib_arp_ipv4_filter filter = {0};
1823 int i;
1824
1825 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1826 info->arp_addr_cnt);
1827
1828 /* Currently only one IP address is supported by firmware.
1829 * In case of more IPs arp filtering will be disabled.
1830 */
1831 if (info->arp_addr_cnt > 0 &&
1832 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1833 for (i = 0; i < info->arp_addr_cnt; i++) {
1834 filter.ipv4addrs[i] = info->arp_addr_list[i];
1835 pr_debug("[STA] addr[%d]: 0x%X\n",
1836 i, filter.ipv4addrs[i]);
1837 }
1838 filter.enable = __cpu_to_le32(1);
1839 }
1840
1841 pr_debug("[STA] arp ip filter enable: %d\n",
1842 __le32_to_cpu(filter.enable));
1843
1844 wsm_set_arp_ipv4_filter(priv, &filter);
1845 }
1846
1847 if (changed &
1848 (BSS_CHANGED_BEACON |
1849 BSS_CHANGED_AP_PROBE_RESP |
1850 BSS_CHANGED_BSSID |
1851 BSS_CHANGED_SSID |
1852 BSS_CHANGED_IBSS)) {
1853 pr_debug("BSS_CHANGED_BEACON\n");
1854 priv->beacon_int = info->beacon_int;
1855 cw1200_update_beaconing(priv);
1856 cw1200_upload_beacon(priv);
1857 }
1858
1859 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1860 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1861
1862 if (priv->enable_beacon != info->enable_beacon) {
1863 cw1200_enable_beaconing(priv, info->enable_beacon);
1864 priv->enable_beacon = info->enable_beacon;
1865 }
1866 }
1867
1868 if (changed & BSS_CHANGED_BEACON_INT) {
1869 pr_debug("CHANGED_BEACON_INT\n");
1870 if (info->ibss_joined)
1871 do_join = true;
1872 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1873 cw1200_update_beaconing(priv);
1874 }
1875
1876 /* assoc/disassoc, or maybe AID changed */
1877 if (changed & BSS_CHANGED_ASSOC) {
1878 wsm_lock_tx(priv);
1879 priv->wep_default_key_id = -1;
1880 wsm_unlock_tx(priv);
1881 }
1882
1883 if (changed & BSS_CHANGED_BSSID) {
1884 pr_debug("BSS_CHANGED_BSSID\n");
1885 do_join = true;
1886 }
1887
1888 if (changed &
1889 (BSS_CHANGED_ASSOC |
1890 BSS_CHANGED_BSSID |
1891 BSS_CHANGED_IBSS |
1892 BSS_CHANGED_BASIC_RATES |
1893 BSS_CHANGED_HT)) {
1894 pr_debug("BSS_CHANGED_ASSOC\n");
1895 if (info->assoc) {
1896 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1897 ieee80211_connection_loss(vif);
1898 mutex_unlock(&priv->conf_mutex);
1899 return;
1900 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1901 priv->join_status = CW1200_JOIN_STATUS_STA;
1902 }
1903 } else {
1904 do_join = true;
1905 }
1906
1907 if (info->assoc || info->ibss_joined) {
1908 struct ieee80211_sta *sta = NULL;
1909 __le32 htprot = 0;
1910
1911 if (info->dtim_period)
1912 priv->join_dtim_period = info->dtim_period;
1913 priv->beacon_int = info->beacon_int;
1914
1915 rcu_read_lock();
1916
1917 if (info->bssid && !info->ibss_joined)
1918 sta = ieee80211_find_sta(vif, info->bssid);
1919 if (sta) {
1920 priv->ht_info.ht_cap = sta->ht_cap;
1921 priv->bss_params.operational_rate_set =
1922 cw1200_rate_mask_to_wsm(priv,
1923 sta->supp_rates[priv->channel->band]);
1924 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1925 priv->ht_info.operation_mode = info->ht_operation_mode;
1926 } else {
1927 memset(&priv->ht_info, 0,
1928 sizeof(priv->ht_info));
1929 priv->bss_params.operational_rate_set = -1;
1930 }
1931 rcu_read_unlock();
1932
1933 /* Non Greenfield stations present */
1934 if (priv->ht_info.operation_mode &
1935 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1936 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1937
1938 /* Set HT protection method */
1939 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1940
1941 /* TODO:
1942 * STBC_param.dual_cts
1943 * STBC_param.LSIG_TXOP_FILL
1944 */
1945
1946 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1947 &htprot, sizeof(htprot));
1948
1949 priv->association_mode.greenfield =
1950 cw1200_ht_greenfield(&priv->ht_info);
1951 priv->association_mode.flags =
1952 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1953 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1954 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1955 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1956 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1957 priv->association_mode.preamble =
1958 info->use_short_preamble ?
1959 WSM_JOIN_PREAMBLE_SHORT :
1960 WSM_JOIN_PREAMBLE_LONG;
1961 priv->association_mode.basic_rate_set = __cpu_to_le32(
1962 cw1200_rate_mask_to_wsm(priv,
1963 info->basic_rates));
1964 priv->association_mode.mpdu_start_spacing =
1965 cw1200_ht_ampdu_density(&priv->ht_info);
1966
1967 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1968 cancel_work_sync(&priv->unjoin_work);
1969
1970 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1971 priv->bss_params.aid = info->aid;
1972
1973 if (priv->join_dtim_period < 1)
1974 priv->join_dtim_period = 1;
1975
1976 pr_debug("[STA] DTIM %d, interval: %d\n",
1977 priv->join_dtim_period, priv->beacon_int);
1978 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1979 priv->association_mode.preamble,
1980 priv->association_mode.greenfield,
1981 priv->bss_params.aid,
1982 priv->bss_params.operational_rate_set,
1983 priv->association_mode.basic_rate_set);
1984 wsm_set_association_mode(priv, &priv->association_mode);
1985
1986 if (!info->ibss_joined) {
1987 wsm_keep_alive_period(priv, 30 /* sec */);
1988 wsm_set_bss_params(priv, &priv->bss_params);
1989 priv->setbssparams_done = true;
1990 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1991 cw1200_set_pm(priv, &priv->powersave_mode);
1992 }
1993 if (priv->vif->p2p) {
1994 pr_debug("[STA] Setting p2p powersave configuration.\n");
1995 wsm_set_p2p_ps_modeinfo(priv,
1996 &priv->p2p_ps_modeinfo);
1997 }
1998 if (priv->bt_present)
1999 cw1200_set_btcoexinfo(priv);
2000 } else {
2001 memset(&priv->association_mode, 0,
2002 sizeof(priv->association_mode));
2003 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
2004 }
2005 }
2006
2007 /* ERP Protection */
2008 if (changed & (BSS_CHANGED_ASSOC |
2009 BSS_CHANGED_ERP_CTS_PROT |
2010 BSS_CHANGED_ERP_PREAMBLE)) {
2011 u32 prev_erp_info = priv->erp_info;
2012 if (info->use_cts_prot)
2013 priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2014 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2015 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2016
2017 if (info->use_short_preamble)
2018 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2019 else
2020 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2021
2022 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2023
2024 if (prev_erp_info != priv->erp_info)
2025 queue_work(priv->workqueue, &priv->set_cts_work);
2026 }
2027
2028 /* ERP Slottime */
2029 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2030 __le32 slot_time = info->use_short_slot ?
2031 __cpu_to_le32(9) : __cpu_to_le32(20);
2032 pr_debug("[STA] Slot time: %d us.\n",
2033 __le32_to_cpu(slot_time));
2034 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2035 &slot_time, sizeof(slot_time));
2036 }
2037
2038 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2039 struct wsm_rcpi_rssi_threshold threshold = {
2040 .rollingAverageCount = 8,
2041 };
2042 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2043 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2044 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2045 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2046
2047 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2048 /* RSSI subscription enabled */
2049 /* TODO: It's not a correct way of setting threshold.
2050 * Upper and lower must be set equal here and adjusted
2051 * in callback. However current implementation is much
2052 * more relaible and stable.
2053 */
2054
2055 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2056 * RSSI = RCPI / 2 - 110
2057 */
2058 if (priv->cqm_use_rssi) {
2059 threshold.upperThreshold =
2060 info->cqm_rssi_thold + info->cqm_rssi_hyst;
2061 threshold.lowerThreshold =
2062 info->cqm_rssi_thold;
2063 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2064 } else {
2065 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2066 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2067 }
2068 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2069 } else {
2070 /* There is a bug in FW, see sta.c. We have to enable
2071 * dummy subscription to get correct RSSI values.
2072 */
2073 threshold.rssiRcpiMode |=
2074 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2075 WSM_RCPI_RSSI_DONT_USE_UPPER |
2076 WSM_RCPI_RSSI_DONT_USE_LOWER;
2077 if (priv->cqm_use_rssi)
2078 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2079 }
2080 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2081 }
2082 mutex_unlock(&priv->conf_mutex);
2083
2084 if (do_join) {
2085 wsm_lock_tx(priv);
2086 cw1200_do_join(priv); /* Will unlock it for us */
2087 }
2088 }
2089
2090 void cw1200_multicast_start_work(struct work_struct *work)
2091 {
2092 struct cw1200_common *priv =
2093 container_of(work, struct cw1200_common, multicast_start_work);
2094 long tmo = priv->join_dtim_period *
2095 (priv->beacon_int + 20) * HZ / 1024;
2096
2097 cancel_work_sync(&priv->multicast_stop_work);
2098
2099 if (!priv->aid0_bit_set) {
2100 wsm_lock_tx(priv);
2101 cw1200_set_tim_impl(priv, true);
2102 priv->aid0_bit_set = true;
2103 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2104 wsm_unlock_tx(priv);
2105 }
2106 }
2107
2108 void cw1200_multicast_stop_work(struct work_struct *work)
2109 {
2110 struct cw1200_common *priv =
2111 container_of(work, struct cw1200_common, multicast_stop_work);
2112
2113 if (priv->aid0_bit_set) {
2114 del_timer_sync(&priv->mcast_timeout);
2115 wsm_lock_tx(priv);
2116 priv->aid0_bit_set = false;
2117 cw1200_set_tim_impl(priv, false);
2118 wsm_unlock_tx(priv);
2119 }
2120 }
2121
2122 void cw1200_mcast_timeout(unsigned long arg)
2123 {
2124 struct cw1200_common *priv =
2125 (struct cw1200_common *)arg;
2126
2127 wiphy_warn(priv->hw->wiphy,
2128 "Multicast delivery timeout.\n");
2129 spin_lock_bh(&priv->ps_state_lock);
2130 priv->tx_multicast = priv->aid0_bit_set &&
2131 priv->buffered_multicasts;
2132 if (priv->tx_multicast)
2133 cw1200_bh_wakeup(priv);
2134 spin_unlock_bh(&priv->ps_state_lock);
2135 }
2136
2137 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2138 struct ieee80211_vif *vif,
2139 enum ieee80211_ampdu_mlme_action action,
2140 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2141 u8 buf_size)
2142 {
2143 /* Aggregation is implemented fully in firmware,
2144 * including block ack negotiation. Do not allow
2145 * mac80211 stack to do anything: it interferes with
2146 * the firmware.
2147 */
2148
2149 /* Note that we still need this function stubbed. */
2150 return -ENOTSUPP;
2151 }
2152
2153 /* ******************************************************************** */
2154 /* WSM callback */
2155 void cw1200_suspend_resume(struct cw1200_common *priv,
2156 struct wsm_suspend_resume *arg)
2157 {
2158 pr_debug("[AP] %s: %s\n",
2159 arg->stop ? "stop" : "start",
2160 arg->multicast ? "broadcast" : "unicast");
2161
2162 if (arg->multicast) {
2163 bool cancel_tmo = false;
2164 spin_lock_bh(&priv->ps_state_lock);
2165 if (arg->stop) {
2166 priv->tx_multicast = false;
2167 } else {
2168 /* Firmware sends this indication every DTIM if there
2169 * is a STA in powersave connected. There is no reason
2170 * to suspend, following wakeup will consume much more
2171 * power than it could be saved.
2172 */
2173 cw1200_pm_stay_awake(&priv->pm_state,
2174 priv->join_dtim_period *
2175 (priv->beacon_int + 20) * HZ / 1024);
2176 priv->tx_multicast = (priv->aid0_bit_set &&
2177 priv->buffered_multicasts);
2178 if (priv->tx_multicast) {
2179 cancel_tmo = true;
2180 cw1200_bh_wakeup(priv);
2181 }
2182 }
2183 spin_unlock_bh(&priv->ps_state_lock);
2184 if (cancel_tmo)
2185 del_timer_sync(&priv->mcast_timeout);
2186 } else {
2187 spin_lock_bh(&priv->ps_state_lock);
2188 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2189 spin_unlock_bh(&priv->ps_state_lock);
2190 if (!arg->stop)
2191 cw1200_bh_wakeup(priv);
2192 }
2193 return;
2194 }
2195
2196 /* ******************************************************************** */
2197 /* AP privates */
2198
2199 static int cw1200_upload_beacon(struct cw1200_common *priv)
2200 {
2201 int ret = 0;
2202 struct ieee80211_mgmt *mgmt;
2203 struct wsm_template_frame frame = {
2204 .frame_type = WSM_FRAME_TYPE_BEACON,
2205 };
2206
2207 u16 tim_offset;
2208 u16 tim_len;
2209
2210 if (priv->mode == NL80211_IFTYPE_STATION ||
2211 priv->mode == NL80211_IFTYPE_MONITOR ||
2212 priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2213 goto done;
2214
2215 if (priv->vif->p2p)
2216 frame.rate = WSM_TRANSMIT_RATE_6;
2217
2218 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2219 &tim_offset, &tim_len);
2220 if (!frame.skb)
2221 return -ENOMEM;
2222
2223 ret = wsm_set_template_frame(priv, &frame);
2224
2225 if (ret)
2226 goto done;
2227
2228 /* TODO: Distill probe resp; remove TIM
2229 * and any other beacon-specific IEs
2230 */
2231 mgmt = (void *)frame.skb->data;
2232 mgmt->frame_control =
2233 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2234 IEEE80211_STYPE_PROBE_RESP);
2235
2236 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2237 if (priv->vif->p2p) {
2238 ret = wsm_set_probe_responder(priv, true);
2239 } else {
2240 ret = wsm_set_template_frame(priv, &frame);
2241 wsm_set_probe_responder(priv, false);
2242 }
2243
2244 done:
2245 dev_kfree_skb(frame.skb);
2246
2247 return ret;
2248 }
2249
2250 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2251 {
2252 int ret = 0;
2253 struct wsm_template_frame frame = {
2254 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2255 .rate = 0xFF,
2256 };
2257
2258
2259 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2260 if (!frame.skb)
2261 return -ENOMEM;
2262
2263 ret = wsm_set_template_frame(priv, &frame);
2264
2265 dev_kfree_skb(frame.skb);
2266
2267 return ret;
2268 }
2269
2270 static int cw1200_upload_null(struct cw1200_common *priv)
2271 {
2272 int ret = 0;
2273 struct wsm_template_frame frame = {
2274 .frame_type = WSM_FRAME_TYPE_NULL,
2275 .rate = 0xFF,
2276 };
2277
2278 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
2279 if (!frame.skb)
2280 return -ENOMEM;
2281
2282 ret = wsm_set_template_frame(priv, &frame);
2283
2284 dev_kfree_skb(frame.skb);
2285
2286 return ret;
2287 }
2288
2289 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2290 {
2291 int ret = 0;
2292 /* TODO: This needs to be implemented
2293
2294 struct wsm_template_frame frame = {
2295 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2296 .rate = 0xFF,
2297 };
2298
2299 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2300 if (!frame.skb)
2301 return -ENOMEM;
2302
2303 ret = wsm_set_template_frame(priv, &frame);
2304
2305 dev_kfree_skb(frame.skb);
2306
2307 */
2308 return ret;
2309 }
2310
2311 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2312 bool enable)
2313 {
2314 struct wsm_beacon_transmit transmit = {
2315 .enable_beaconing = enable,
2316 };
2317
2318 return wsm_beacon_transmit(priv, &transmit);
2319 }
2320
2321 static int cw1200_start_ap(struct cw1200_common *priv)
2322 {
2323 int ret;
2324 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2325 struct wsm_start start = {
2326 .mode = priv->vif->p2p ?
2327 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2328 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
2329 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2330 .channel_number = priv->channel->hw_value,
2331 .beacon_interval = conf->beacon_int,
2332 .dtim_period = conf->dtim_period,
2333 .preamble = conf->use_short_preamble ?
2334 WSM_JOIN_PREAMBLE_SHORT :
2335 WSM_JOIN_PREAMBLE_LONG,
2336 .probe_delay = 100,
2337 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2338 conf->basic_rates),
2339 };
2340 struct wsm_operational_mode mode = {
2341 .power_mode = cw1200_power_mode,
2342 .disable_more_flag_usage = true,
2343 };
2344
2345 memset(start.ssid, 0, sizeof(start.ssid));
2346 if (!conf->hidden_ssid) {
2347 start.ssid_len = conf->ssid_len;
2348 memcpy(start.ssid, conf->ssid, start.ssid_len);
2349 }
2350
2351 priv->beacon_int = conf->beacon_int;
2352 priv->join_dtim_period = conf->dtim_period;
2353
2354 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2355
2356 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2357 start.channel_number, start.band,
2358 start.beacon_interval, start.dtim_period,
2359 start.basic_rate_set,
2360 start.ssid_len, start.ssid);
2361 ret = wsm_start(priv, &start);
2362 if (!ret)
2363 ret = cw1200_upload_keys(priv);
2364 if (!ret && priv->vif->p2p) {
2365 pr_debug("[AP] Setting p2p powersave configuration.\n");
2366 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2367 }
2368 if (!ret) {
2369 wsm_set_block_ack_policy(priv, 0, 0);
2370 priv->join_status = CW1200_JOIN_STATUS_AP;
2371 cw1200_update_filtering(priv);
2372 }
2373 wsm_set_operational_mode(priv, &mode);
2374 return ret;
2375 }
2376
2377 static int cw1200_update_beaconing(struct cw1200_common *priv)
2378 {
2379 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2380 struct wsm_reset reset = {
2381 .link_id = 0,
2382 .reset_statistics = true,
2383 };
2384
2385 if (priv->mode == NL80211_IFTYPE_AP) {
2386 /* TODO: check if changed channel, band */
2387 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2388 priv->beacon_int != conf->beacon_int) {
2389 pr_debug("ap restarting\n");
2390 wsm_lock_tx(priv);
2391 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2392 wsm_reset(priv, &reset);
2393 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2394 cw1200_start_ap(priv);
2395 wsm_unlock_tx(priv);
2396 } else
2397 pr_debug("ap started join_status: %d\n",
2398 priv->join_status);
2399 }
2400 return 0;
2401 }
Linux kernel - Deliverables
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