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sg_start_req(): use import_iovec()
[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_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 memset(priv->mac_addr, 0, ETH_ALEN);
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_PROMISC_IN_BSS |
582 FIF_OTHER_BSS |
583 FIF_BCN_PRBRESP_PROMISC |
584 FIF_PROBE_REQ));
585
586 *total_flags &= FIF_PROMISC_IN_BSS |
587 FIF_OTHER_BSS |
588 FIF_FCSFAIL |
589 FIF_BCN_PRBRESP_PROMISC |
590 FIF_PROBE_REQ;
591
592 down(&priv->scan.lock);
593 mutex_lock(&priv->conf_mutex);
594
595 priv->rx_filter.promiscuous = (*total_flags & FIF_PROMISC_IN_BSS)
596 ? 1 : 0;
597 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
598 FIF_PROBE_REQ)) ? 1 : 0;
599 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
600 priv->disable_beacon_filter = !(*total_flags &
601 (FIF_BCN_PRBRESP_PROMISC |
602 FIF_PROMISC_IN_BSS |
603 FIF_PROBE_REQ));
604 if (priv->listening != listening) {
605 priv->listening = listening;
606 wsm_lock_tx(priv);
607 cw1200_update_listening(priv, listening);
608 wsm_unlock_tx(priv);
609 }
610 cw1200_update_filtering(priv);
611 mutex_unlock(&priv->conf_mutex);
612 up(&priv->scan.lock);
613 }
614
615 int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
616 u16 queue, const struct ieee80211_tx_queue_params *params)
617 {
618 struct cw1200_common *priv = dev->priv;
619 int ret = 0;
620 /* To prevent re-applying PM request OID again and again*/
621 bool old_uapsd_flags;
622
623 mutex_lock(&priv->conf_mutex);
624
625 if (queue < dev->queues) {
626 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
627
628 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
629 ret = wsm_set_tx_queue_params(priv,
630 &priv->tx_queue_params.params[queue], queue);
631 if (ret) {
632 ret = -EINVAL;
633 goto out;
634 }
635
636 WSM_EDCA_SET(&priv->edca, queue, params->aifs,
637 params->cw_min, params->cw_max,
638 params->txop, 0xc8,
639 params->uapsd);
640 ret = wsm_set_edca_params(priv, &priv->edca);
641 if (ret) {
642 ret = -EINVAL;
643 goto out;
644 }
645
646 if (priv->mode == NL80211_IFTYPE_STATION) {
647 ret = cw1200_set_uapsd_param(priv, &priv->edca);
648 if (!ret && priv->setbssparams_done &&
649 (priv->join_status == CW1200_JOIN_STATUS_STA) &&
650 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
651 ret = cw1200_set_pm(priv, &priv->powersave_mode);
652 }
653 } else {
654 ret = -EINVAL;
655 }
656
657 out:
658 mutex_unlock(&priv->conf_mutex);
659 return ret;
660 }
661
662 int cw1200_get_stats(struct ieee80211_hw *dev,
663 struct ieee80211_low_level_stats *stats)
664 {
665 struct cw1200_common *priv = dev->priv;
666
667 memcpy(stats, &priv->stats, sizeof(*stats));
668 return 0;
669 }
670
671 int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
672 {
673 struct wsm_set_pm pm = *arg;
674
675 if (priv->uapsd_info.uapsd_flags != 0)
676 pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
677
678 if (memcmp(&pm, &priv->firmware_ps_mode,
679 sizeof(struct wsm_set_pm))) {
680 priv->firmware_ps_mode = pm;
681 return wsm_set_pm(priv, &pm);
682 } else {
683 return 0;
684 }
685 }
686
687 int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
688 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
689 struct ieee80211_key_conf *key)
690 {
691 int ret = -EOPNOTSUPP;
692 struct cw1200_common *priv = dev->priv;
693 struct ieee80211_key_seq seq;
694
695 mutex_lock(&priv->conf_mutex);
696
697 if (cmd == SET_KEY) {
698 u8 *peer_addr = NULL;
699 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
700 1 : 0;
701 int idx = cw1200_alloc_key(priv);
702 struct wsm_add_key *wsm_key = &priv->keys[idx];
703
704 if (idx < 0) {
705 ret = -EINVAL;
706 goto finally;
707 }
708
709 if (sta)
710 peer_addr = sta->addr;
711
712 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE |
713 IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
714
715 switch (key->cipher) {
716 case WLAN_CIPHER_SUITE_WEP40:
717 case WLAN_CIPHER_SUITE_WEP104:
718 if (key->keylen > 16) {
719 cw1200_free_key(priv, idx);
720 ret = -EINVAL;
721 goto finally;
722 }
723
724 if (pairwise) {
725 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
726 memcpy(wsm_key->wep_pairwise.peer,
727 peer_addr, ETH_ALEN);
728 memcpy(wsm_key->wep_pairwise.keydata,
729 &key->key[0], key->keylen);
730 wsm_key->wep_pairwise.keylen = key->keylen;
731 } else {
732 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
733 memcpy(wsm_key->wep_group.keydata,
734 &key->key[0], key->keylen);
735 wsm_key->wep_group.keylen = key->keylen;
736 wsm_key->wep_group.keyid = key->keyidx;
737 }
738 break;
739 case WLAN_CIPHER_SUITE_TKIP:
740 ieee80211_get_key_rx_seq(key, 0, &seq);
741 if (pairwise) {
742 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
743 memcpy(wsm_key->tkip_pairwise.peer,
744 peer_addr, ETH_ALEN);
745 memcpy(wsm_key->tkip_pairwise.keydata,
746 &key->key[0], 16);
747 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
748 &key->key[16], 8);
749 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
750 &key->key[24], 8);
751 } else {
752 size_t mic_offset =
753 (priv->mode == NL80211_IFTYPE_AP) ?
754 16 : 24;
755 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
756 memcpy(wsm_key->tkip_group.keydata,
757 &key->key[0], 16);
758 memcpy(wsm_key->tkip_group.rx_mic_key,
759 &key->key[mic_offset], 8);
760
761 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
762 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
763 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
764 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
765 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
766 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
767 wsm_key->tkip_group.rx_seqnum[6] = 0;
768 wsm_key->tkip_group.rx_seqnum[7] = 0;
769
770 wsm_key->tkip_group.keyid = key->keyidx;
771 }
772 break;
773 case WLAN_CIPHER_SUITE_CCMP:
774 ieee80211_get_key_rx_seq(key, 0, &seq);
775 if (pairwise) {
776 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
777 memcpy(wsm_key->aes_pairwise.peer,
778 peer_addr, ETH_ALEN);
779 memcpy(wsm_key->aes_pairwise.keydata,
780 &key->key[0], 16);
781 } else {
782 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
783 memcpy(wsm_key->aes_group.keydata,
784 &key->key[0], 16);
785
786 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
787 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
788 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
789 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
790 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
791 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
792 wsm_key->aes_group.rx_seqnum[6] = 0;
793 wsm_key->aes_group.rx_seqnum[7] = 0;
794 wsm_key->aes_group.keyid = key->keyidx;
795 }
796 break;
797 case WLAN_CIPHER_SUITE_SMS4:
798 if (pairwise) {
799 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
800 memcpy(wsm_key->wapi_pairwise.peer,
801 peer_addr, ETH_ALEN);
802 memcpy(wsm_key->wapi_pairwise.keydata,
803 &key->key[0], 16);
804 memcpy(wsm_key->wapi_pairwise.mic_key,
805 &key->key[16], 16);
806 wsm_key->wapi_pairwise.keyid = key->keyidx;
807 } else {
808 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
809 memcpy(wsm_key->wapi_group.keydata,
810 &key->key[0], 16);
811 memcpy(wsm_key->wapi_group.mic_key,
812 &key->key[16], 16);
813 wsm_key->wapi_group.keyid = key->keyidx;
814 }
815 break;
816 default:
817 pr_warn("Unhandled key type %d\n", key->cipher);
818 cw1200_free_key(priv, idx);
819 ret = -EOPNOTSUPP;
820 goto finally;
821 }
822 ret = wsm_add_key(priv, wsm_key);
823 if (!ret)
824 key->hw_key_idx = idx;
825 else
826 cw1200_free_key(priv, idx);
827 } else if (cmd == DISABLE_KEY) {
828 struct wsm_remove_key wsm_key = {
829 .index = key->hw_key_idx,
830 };
831
832 if (wsm_key.index > WSM_KEY_MAX_INDEX) {
833 ret = -EINVAL;
834 goto finally;
835 }
836
837 cw1200_free_key(priv, wsm_key.index);
838 ret = wsm_remove_key(priv, &wsm_key);
839 } else {
840 pr_warn("Unhandled key command %d\n", cmd);
841 }
842
843 finally:
844 mutex_unlock(&priv->conf_mutex);
845 return ret;
846 }
847
848 void cw1200_wep_key_work(struct work_struct *work)
849 {
850 struct cw1200_common *priv =
851 container_of(work, struct cw1200_common, wep_key_work);
852 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
853 struct cw1200_queue *queue = &priv->tx_queue[queue_id];
854 __le32 wep_default_key_id = __cpu_to_le32(
855 priv->wep_default_key_id);
856
857 pr_debug("[STA] Setting default WEP key: %d\n",
858 priv->wep_default_key_id);
859 wsm_flush_tx(priv);
860 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
861 &wep_default_key_id, sizeof(wep_default_key_id));
862 cw1200_queue_requeue(queue, priv->pending_frame_id);
863 wsm_unlock_tx(priv);
864 }
865
866 int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
867 {
868 int ret = 0;
869 __le32 val32;
870 struct cw1200_common *priv = hw->priv;
871
872 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
873 return 0;
874
875 if (value != (u32) -1)
876 val32 = __cpu_to_le32(value);
877 else
878 val32 = 0; /* disabled */
879
880 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
881 /* device is down, can _not_ set threshold */
882 ret = -ENODEV;
883 goto out;
884 }
885
886 if (priv->rts_threshold == value)
887 goto out;
888
889 pr_debug("[STA] Setting RTS threshold: %d\n",
890 priv->rts_threshold);
891
892 /* mutex_lock(&priv->conf_mutex); */
893 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
894 &val32, sizeof(val32));
895 if (!ret)
896 priv->rts_threshold = value;
897 /* mutex_unlock(&priv->conf_mutex); */
898
899 out:
900 return ret;
901 }
902
903 /* If successful, LOCKS the TX queue! */
904 static int __cw1200_flush(struct cw1200_common *priv, bool drop)
905 {
906 int i, ret;
907
908 for (;;) {
909 /* TODO: correct flush handling is required when dev_stop.
910 * Temporary workaround: 2s
911 */
912 if (drop) {
913 for (i = 0; i < 4; ++i)
914 cw1200_queue_clear(&priv->tx_queue[i]);
915 } else {
916 ret = wait_event_timeout(
917 priv->tx_queue_stats.wait_link_id_empty,
918 cw1200_queue_stats_is_empty(
919 &priv->tx_queue_stats, -1),
920 2 * HZ);
921 }
922
923 if (!drop && ret <= 0) {
924 ret = -ETIMEDOUT;
925 break;
926 } else {
927 ret = 0;
928 }
929
930 wsm_lock_tx(priv);
931 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
932 /* Highly unlikely: WSM requeued frames. */
933 wsm_unlock_tx(priv);
934 continue;
935 }
936 break;
937 }
938 return ret;
939 }
940
941 void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
942 u32 queues, bool drop)
943 {
944 struct cw1200_common *priv = hw->priv;
945
946 switch (priv->mode) {
947 case NL80211_IFTYPE_MONITOR:
948 drop = true;
949 break;
950 case NL80211_IFTYPE_AP:
951 if (!priv->enable_beacon)
952 drop = true;
953 break;
954 }
955
956 if (!__cw1200_flush(priv, drop))
957 wsm_unlock_tx(priv);
958
959 return;
960 }
961
962 /* ******************************************************************** */
963 /* WSM callbacks */
964
965 void cw1200_free_event_queue(struct cw1200_common *priv)
966 {
967 LIST_HEAD(list);
968
969 spin_lock(&priv->event_queue_lock);
970 list_splice_init(&priv->event_queue, &list);
971 spin_unlock(&priv->event_queue_lock);
972
973 __cw1200_free_event_queue(&list);
974 }
975
976 void cw1200_event_handler(struct work_struct *work)
977 {
978 struct cw1200_common *priv =
979 container_of(work, struct cw1200_common, event_handler);
980 struct cw1200_wsm_event *event;
981 LIST_HEAD(list);
982
983 spin_lock(&priv->event_queue_lock);
984 list_splice_init(&priv->event_queue, &list);
985 spin_unlock(&priv->event_queue_lock);
986
987 list_for_each_entry(event, &list, link) {
988 switch (event->evt.id) {
989 case WSM_EVENT_ERROR:
990 pr_err("Unhandled WSM Error from LMAC\n");
991 break;
992 case WSM_EVENT_BSS_LOST:
993 pr_debug("[CQM] BSS lost.\n");
994 cancel_work_sync(&priv->unjoin_work);
995 if (!down_trylock(&priv->scan.lock)) {
996 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
997 up(&priv->scan.lock);
998 } else {
999 /* Scan is in progress. Delay reporting.
1000 * Scan complete will trigger bss_loss_work
1001 */
1002 priv->delayed_link_loss = 1;
1003 /* Also start a watchdog. */
1004 queue_delayed_work(priv->workqueue,
1005 &priv->bss_loss_work, 5*HZ);
1006 }
1007 break;
1008 case WSM_EVENT_BSS_REGAINED:
1009 pr_debug("[CQM] BSS regained.\n");
1010 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1011 cancel_work_sync(&priv->unjoin_work);
1012 break;
1013 case WSM_EVENT_RADAR_DETECTED:
1014 wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1015 break;
1016 case WSM_EVENT_RCPI_RSSI:
1017 {
1018 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1019 * RSSI = RCPI / 2 - 110
1020 */
1021 int rcpi_rssi = (int)(event->evt.data & 0xFF);
1022 int cqm_evt;
1023 if (priv->cqm_use_rssi)
1024 rcpi_rssi = (s8)rcpi_rssi;
1025 else
1026 rcpi_rssi = rcpi_rssi / 2 - 110;
1027
1028 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1029 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1030 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1031 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1032 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
1033 GFP_KERNEL);
1034 break;
1035 }
1036 case WSM_EVENT_BT_INACTIVE:
1037 pr_warn("Unhandled BT INACTIVE from LMAC\n");
1038 break;
1039 case WSM_EVENT_BT_ACTIVE:
1040 pr_warn("Unhandled BT ACTIVE from LMAC\n");
1041 break;
1042 }
1043 }
1044 __cw1200_free_event_queue(&list);
1045 }
1046
1047 void cw1200_bss_loss_work(struct work_struct *work)
1048 {
1049 struct cw1200_common *priv =
1050 container_of(work, struct cw1200_common, bss_loss_work.work);
1051
1052 pr_debug("[CQM] Reporting connection loss.\n");
1053 wsm_lock_tx(priv);
1054 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1055 wsm_unlock_tx(priv);
1056 }
1057
1058 void cw1200_bss_params_work(struct work_struct *work)
1059 {
1060 struct cw1200_common *priv =
1061 container_of(work, struct cw1200_common, bss_params_work);
1062 mutex_lock(&priv->conf_mutex);
1063
1064 priv->bss_params.reset_beacon_loss = 1;
1065 wsm_set_bss_params(priv, &priv->bss_params);
1066 priv->bss_params.reset_beacon_loss = 0;
1067
1068 mutex_unlock(&priv->conf_mutex);
1069 }
1070
1071 /* ******************************************************************** */
1072 /* Internal API */
1073
1074 /* This function is called to Parse the SDD file
1075 * to extract listen_interval and PTA related information
1076 * sdd is a TLV: u8 id, u8 len, u8 data[]
1077 */
1078 static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1079 {
1080 const u8 *p = priv->sdd->data;
1081 int ret = 0;
1082
1083 while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1084 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1085 pr_warn("Malformed sdd structure\n");
1086 return -1;
1087 }
1088 switch (p[0]) {
1089 case SDD_PTA_CFG_ELT_ID: {
1090 u16 v;
1091 if (p[1] < 4) {
1092 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1093 ret = -1;
1094 break;
1095 }
1096 v = le16_to_cpu(*((__le16 *)(p + 2)));
1097 if (!v) /* non-zero means this is enabled */
1098 break;
1099
1100 v = le16_to_cpu(*((__le16 *)(p + 4)));
1101 priv->conf_listen_interval = (v >> 7) & 0x1F;
1102 pr_debug("PTA found; Listen Interval %d\n",
1103 priv->conf_listen_interval);
1104 break;
1105 }
1106 case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1107 u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1108 if (clk != priv->hw_refclk)
1109 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1110 clk, priv->hw_refclk);
1111 break;
1112 }
1113 default:
1114 break;
1115 }
1116 p += p[1] + 2;
1117 }
1118
1119 if (!priv->bt_present) {
1120 pr_debug("PTA element NOT found.\n");
1121 priv->conf_listen_interval = 0;
1122 }
1123 return ret;
1124 }
1125
1126 int cw1200_setup_mac(struct cw1200_common *priv)
1127 {
1128 int ret = 0;
1129
1130 /* NOTE: There is a bug in FW: it reports signal
1131 * as RSSI if RSSI subscription is enabled.
1132 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1133 *
1134 * NOTE2: RSSI based reports have been switched to RCPI, since
1135 * FW has a bug and RSSI reported values are not stable,
1136 * what can leads to signal level oscilations in user-end applications
1137 */
1138 struct wsm_rcpi_rssi_threshold threshold = {
1139 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1140 WSM_RCPI_RSSI_DONT_USE_UPPER |
1141 WSM_RCPI_RSSI_DONT_USE_LOWER,
1142 .rollingAverageCount = 16,
1143 };
1144
1145 struct wsm_configuration cfg = {
1146 .dot11StationId = &priv->mac_addr[0],
1147 };
1148
1149 /* Remember the decission here to make sure, we will handle
1150 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1151 */
1152 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1153 priv->cqm_use_rssi = true;
1154
1155 if (!priv->sdd) {
1156 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1157 if (ret) {
1158 pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1159 return ret;
1160 }
1161 cw1200_parse_sdd_file(priv);
1162 }
1163
1164 cfg.dpdData = priv->sdd->data;
1165 cfg.dpdData_size = priv->sdd->size;
1166 ret = wsm_configuration(priv, &cfg);
1167 if (ret)
1168 return ret;
1169
1170 /* Configure RSSI/SCPI reporting as RSSI. */
1171 wsm_set_rcpi_rssi_threshold(priv, &threshold);
1172
1173 return 0;
1174 }
1175
1176 static void cw1200_join_complete(struct cw1200_common *priv)
1177 {
1178 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1179
1180 priv->join_pending = false;
1181 if (priv->join_complete_status) {
1182 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1183 cw1200_update_listening(priv, priv->listening);
1184 cw1200_do_unjoin(priv);
1185 ieee80211_connection_loss(priv->vif);
1186 } else {
1187 if (priv->mode == NL80211_IFTYPE_ADHOC)
1188 priv->join_status = CW1200_JOIN_STATUS_IBSS;
1189 else
1190 priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1191 }
1192 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1193 }
1194
1195 void cw1200_join_complete_work(struct work_struct *work)
1196 {
1197 struct cw1200_common *priv =
1198 container_of(work, struct cw1200_common, join_complete_work);
1199 mutex_lock(&priv->conf_mutex);
1200 cw1200_join_complete(priv);
1201 mutex_unlock(&priv->conf_mutex);
1202 }
1203
1204 void cw1200_join_complete_cb(struct cw1200_common *priv,
1205 struct wsm_join_complete *arg)
1206 {
1207 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1208 arg->status);
1209
1210 if (cancel_delayed_work(&priv->join_timeout)) {
1211 priv->join_complete_status = arg->status;
1212 queue_work(priv->workqueue, &priv->join_complete_work);
1213 }
1214 }
1215
1216 /* MUST be called with tx_lock held! It will be unlocked for us. */
1217 static void cw1200_do_join(struct cw1200_common *priv)
1218 {
1219 const u8 *bssid;
1220 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1221 struct cfg80211_bss *bss = NULL;
1222 struct wsm_protected_mgmt_policy mgmt_policy;
1223 struct wsm_join join = {
1224 .mode = conf->ibss_joined ?
1225 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1226 .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1227 .probe_for_join = 1,
1228 .atim_window = 0,
1229 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1230 conf->basic_rates),
1231 };
1232 if (delayed_work_pending(&priv->join_timeout)) {
1233 pr_warn("[STA] - Join request already pending, skipping..\n");
1234 wsm_unlock_tx(priv);
1235 return;
1236 }
1237
1238 if (priv->join_status)
1239 cw1200_do_unjoin(priv);
1240
1241 bssid = priv->vif->bss_conf.bssid;
1242
1243 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel,
1244 bssid, NULL, 0, 0, 0);
1245
1246 if (!bss && !conf->ibss_joined) {
1247 wsm_unlock_tx(priv);
1248 return;
1249 }
1250
1251 mutex_lock(&priv->conf_mutex);
1252
1253 /* Under the conf lock: check scan status and
1254 * bail out if it is in progress.
1255 */
1256 if (atomic_read(&priv->scan.in_progress)) {
1257 wsm_unlock_tx(priv);
1258 goto done_put;
1259 }
1260
1261 priv->join_pending = true;
1262
1263 /* Sanity check basic rates */
1264 if (!join.basic_rate_set)
1265 join.basic_rate_set = 7;
1266
1267 /* Sanity check beacon interval */
1268 if (!priv->beacon_int)
1269 priv->beacon_int = 1;
1270
1271 join.beacon_interval = priv->beacon_int;
1272
1273 /* BT Coex related changes */
1274 if (priv->bt_present) {
1275 if (((priv->conf_listen_interval * 100) %
1276 priv->beacon_int) == 0)
1277 priv->listen_interval =
1278 ((priv->conf_listen_interval * 100) /
1279 priv->beacon_int);
1280 else
1281 priv->listen_interval =
1282 ((priv->conf_listen_interval * 100) /
1283 priv->beacon_int + 1);
1284 }
1285
1286 if (priv->hw->conf.ps_dtim_period)
1287 priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1288 join.dtim_period = priv->join_dtim_period;
1289
1290 join.channel_number = priv->channel->hw_value;
1291 join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
1292 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1293
1294 memcpy(join.bssid, bssid, sizeof(join.bssid));
1295
1296 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1297 join.bssid,
1298 join.dtim_period, priv->beacon_int);
1299
1300 if (!conf->ibss_joined) {
1301 const u8 *ssidie;
1302 rcu_read_lock();
1303 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1304 if (ssidie) {
1305 join.ssid_len = ssidie[1];
1306 memcpy(join.ssid, &ssidie[2], join.ssid_len);
1307 }
1308 rcu_read_unlock();
1309 }
1310
1311 if (priv->vif->p2p) {
1312 join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1313 join.basic_rate_set =
1314 cw1200_rate_mask_to_wsm(priv, 0xFF0);
1315 }
1316
1317 /* Enable asynchronous join calls */
1318 if (!conf->ibss_joined) {
1319 join.flags |= WSM_JOIN_FLAGS_FORCE;
1320 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1321 }
1322
1323 wsm_flush_tx(priv);
1324
1325 /* Stay Awake for Join and Auth Timeouts and a bit more */
1326 cw1200_pm_stay_awake(&priv->pm_state,
1327 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1328
1329 cw1200_update_listening(priv, false);
1330
1331 /* Turn on Block ACKs */
1332 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1333 priv->ba_rx_tid_mask);
1334
1335 /* Set up timeout */
1336 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1337 priv->join_status = CW1200_JOIN_STATUS_JOINING;
1338 queue_delayed_work(priv->workqueue,
1339 &priv->join_timeout,
1340 CW1200_JOIN_TIMEOUT);
1341 }
1342
1343 /* 802.11w protected mgmt frames */
1344 mgmt_policy.protectedMgmtEnable = 0;
1345 mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1346 mgmt_policy.encryptionForAuthFrame = 1;
1347 wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1348
1349 /* Perform actual join */
1350 if (wsm_join(priv, &join)) {
1351 pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1352 cancel_delayed_work_sync(&priv->join_timeout);
1353 cw1200_update_listening(priv, priv->listening);
1354 /* Tx lock still held, unjoin will clear it. */
1355 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1356 wsm_unlock_tx(priv);
1357 } else {
1358 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1359 cw1200_join_complete(priv); /* Will clear tx_lock */
1360
1361 /* Upload keys */
1362 cw1200_upload_keys(priv);
1363
1364 /* Due to beacon filtering it is possible that the
1365 * AP's beacon is not known for the mac80211 stack.
1366 * Disable filtering temporary to make sure the stack
1367 * receives at least one
1368 */
1369 priv->disable_beacon_filter = true;
1370 }
1371 cw1200_update_filtering(priv);
1372
1373 done_put:
1374 mutex_unlock(&priv->conf_mutex);
1375 if (bss)
1376 cfg80211_put_bss(priv->hw->wiphy, bss);
1377 }
1378
1379 void cw1200_join_timeout(struct work_struct *work)
1380 {
1381 struct cw1200_common *priv =
1382 container_of(work, struct cw1200_common, join_timeout.work);
1383 pr_debug("[WSM] Join timed out.\n");
1384 wsm_lock_tx(priv);
1385 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1386 wsm_unlock_tx(priv);
1387 }
1388
1389 static void cw1200_do_unjoin(struct cw1200_common *priv)
1390 {
1391 struct wsm_reset reset = {
1392 .reset_statistics = true,
1393 };
1394
1395 cancel_delayed_work_sync(&priv->join_timeout);
1396
1397 mutex_lock(&priv->conf_mutex);
1398 priv->join_pending = false;
1399
1400 if (atomic_read(&priv->scan.in_progress)) {
1401 if (priv->delayed_unjoin)
1402 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1403 else
1404 priv->delayed_unjoin = true;
1405 goto done;
1406 }
1407
1408 priv->delayed_link_loss = false;
1409
1410 if (!priv->join_status)
1411 goto done;
1412
1413 if (priv->join_status == CW1200_JOIN_STATUS_AP)
1414 goto done;
1415
1416 cancel_work_sync(&priv->update_filtering_work);
1417 cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1418 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1419
1420 /* Unjoin is a reset. */
1421 wsm_flush_tx(priv);
1422 wsm_keep_alive_period(priv, 0);
1423 wsm_reset(priv, &reset);
1424 wsm_set_output_power(priv, priv->output_power * 10);
1425 priv->join_dtim_period = 0;
1426 cw1200_setup_mac(priv);
1427 cw1200_free_event_queue(priv);
1428 cancel_work_sync(&priv->event_handler);
1429 cw1200_update_listening(priv, priv->listening);
1430 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1431
1432 /* Disable Block ACKs */
1433 wsm_set_block_ack_policy(priv, 0, 0);
1434
1435 priv->disable_beacon_filter = false;
1436 cw1200_update_filtering(priv);
1437 memset(&priv->association_mode, 0,
1438 sizeof(priv->association_mode));
1439 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1440 priv->setbssparams_done = false;
1441 memset(&priv->firmware_ps_mode, 0,
1442 sizeof(priv->firmware_ps_mode));
1443
1444 pr_debug("[STA] Unjoin completed.\n");
1445
1446 done:
1447 mutex_unlock(&priv->conf_mutex);
1448 }
1449
1450 void cw1200_unjoin_work(struct work_struct *work)
1451 {
1452 struct cw1200_common *priv =
1453 container_of(work, struct cw1200_common, unjoin_work);
1454
1455 cw1200_do_unjoin(priv);
1456
1457 /* Tell the stack we're dead */
1458 ieee80211_connection_loss(priv->vif);
1459
1460 wsm_unlock_tx(priv);
1461 }
1462
1463 int cw1200_enable_listening(struct cw1200_common *priv)
1464 {
1465 struct wsm_start start = {
1466 .mode = WSM_START_MODE_P2P_DEV,
1467 .band = WSM_PHY_BAND_2_4G,
1468 .beacon_interval = 100,
1469 .dtim_period = 1,
1470 .probe_delay = 0,
1471 .basic_rate_set = 0x0F,
1472 };
1473
1474 if (priv->channel) {
1475 start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
1476 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1477 start.channel_number = priv->channel->hw_value;
1478 } else {
1479 start.band = WSM_PHY_BAND_2_4G;
1480 start.channel_number = 1;
1481 }
1482
1483 return wsm_start(priv, &start);
1484 }
1485
1486 int cw1200_disable_listening(struct cw1200_common *priv)
1487 {
1488 int ret;
1489 struct wsm_reset reset = {
1490 .reset_statistics = true,
1491 };
1492 ret = wsm_reset(priv, &reset);
1493 return ret;
1494 }
1495
1496 void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1497 {
1498 if (enabled) {
1499 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1500 if (!cw1200_enable_listening(priv))
1501 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1502 wsm_set_probe_responder(priv, true);
1503 }
1504 } else {
1505 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1506 if (!cw1200_disable_listening(priv))
1507 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1508 wsm_set_probe_responder(priv, false);
1509 }
1510 }
1511 }
1512
1513 int cw1200_set_uapsd_param(struct cw1200_common *priv,
1514 const struct wsm_edca_params *arg)
1515 {
1516 int ret;
1517 u16 uapsd_flags = 0;
1518
1519 /* Here's the mapping AC [queue, bit]
1520 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1521 */
1522
1523 if (arg->uapsd_enable[0])
1524 uapsd_flags |= 1 << 3;
1525
1526 if (arg->uapsd_enable[1])
1527 uapsd_flags |= 1 << 2;
1528
1529 if (arg->uapsd_enable[2])
1530 uapsd_flags |= 1 << 1;
1531
1532 if (arg->uapsd_enable[3])
1533 uapsd_flags |= 1;
1534
1535 /* Currently pseudo U-APSD operation is not supported, so setting
1536 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1537 * AutoTriggerStep to 0
1538 */
1539
1540 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1541 priv->uapsd_info.min_auto_trigger_interval = 0;
1542 priv->uapsd_info.max_auto_trigger_interval = 0;
1543 priv->uapsd_info.auto_trigger_step = 0;
1544
1545 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1546 return ret;
1547 }
1548
1549 /* ******************************************************************** */
1550 /* AP API */
1551
1552 int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1553 struct ieee80211_sta *sta)
1554 {
1555 struct cw1200_common *priv = hw->priv;
1556 struct cw1200_sta_priv *sta_priv =
1557 (struct cw1200_sta_priv *)&sta->drv_priv;
1558 struct cw1200_link_entry *entry;
1559 struct sk_buff *skb;
1560
1561 if (priv->mode != NL80211_IFTYPE_AP)
1562 return 0;
1563
1564 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1565 if (WARN_ON(!sta_priv->link_id)) {
1566 wiphy_info(priv->hw->wiphy,
1567 "[AP] No more link IDs available.\n");
1568 return -ENOENT;
1569 }
1570
1571 entry = &priv->link_id_db[sta_priv->link_id - 1];
1572 spin_lock_bh(&priv->ps_state_lock);
1573 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1574 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1575 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1576 entry->status = CW1200_LINK_HARD;
1577 while ((skb = skb_dequeue(&entry->rx_queue)))
1578 ieee80211_rx_irqsafe(priv->hw, skb);
1579 spin_unlock_bh(&priv->ps_state_lock);
1580 return 0;
1581 }
1582
1583 int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1584 struct ieee80211_sta *sta)
1585 {
1586 struct cw1200_common *priv = hw->priv;
1587 struct cw1200_sta_priv *sta_priv =
1588 (struct cw1200_sta_priv *)&sta->drv_priv;
1589 struct cw1200_link_entry *entry;
1590
1591 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1592 return 0;
1593
1594 entry = &priv->link_id_db[sta_priv->link_id - 1];
1595 spin_lock_bh(&priv->ps_state_lock);
1596 entry->status = CW1200_LINK_RESERVE;
1597 entry->timestamp = jiffies;
1598 wsm_lock_tx_async(priv);
1599 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1600 wsm_unlock_tx(priv);
1601 spin_unlock_bh(&priv->ps_state_lock);
1602 flush_workqueue(priv->workqueue);
1603 return 0;
1604 }
1605
1606 static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1607 struct ieee80211_vif *vif,
1608 enum sta_notify_cmd notify_cmd,
1609 int link_id)
1610 {
1611 struct cw1200_common *priv = dev->priv;
1612 u32 bit, prev;
1613
1614 /* Zero link id means "for all link IDs" */
1615 if (link_id)
1616 bit = BIT(link_id);
1617 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1618 bit = 0;
1619 else
1620 bit = priv->link_id_map;
1621 prev = priv->sta_asleep_mask & bit;
1622
1623 switch (notify_cmd) {
1624 case STA_NOTIFY_SLEEP:
1625 if (!prev) {
1626 if (priv->buffered_multicasts &&
1627 !priv->sta_asleep_mask)
1628 queue_work(priv->workqueue,
1629 &priv->multicast_start_work);
1630 priv->sta_asleep_mask |= bit;
1631 }
1632 break;
1633 case STA_NOTIFY_AWAKE:
1634 if (prev) {
1635 priv->sta_asleep_mask &= ~bit;
1636 priv->pspoll_mask &= ~bit;
1637 if (priv->tx_multicast && link_id &&
1638 !priv->sta_asleep_mask)
1639 queue_work(priv->workqueue,
1640 &priv->multicast_stop_work);
1641 cw1200_bh_wakeup(priv);
1642 }
1643 break;
1644 }
1645 }
1646
1647 void cw1200_sta_notify(struct ieee80211_hw *dev,
1648 struct ieee80211_vif *vif,
1649 enum sta_notify_cmd notify_cmd,
1650 struct ieee80211_sta *sta)
1651 {
1652 struct cw1200_common *priv = dev->priv;
1653 struct cw1200_sta_priv *sta_priv =
1654 (struct cw1200_sta_priv *)&sta->drv_priv;
1655
1656 spin_lock_bh(&priv->ps_state_lock);
1657 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1658 spin_unlock_bh(&priv->ps_state_lock);
1659 }
1660
1661 static void cw1200_ps_notify(struct cw1200_common *priv,
1662 int link_id, bool ps)
1663 {
1664 if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1665 return;
1666
1667 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1668 ps ? "Stop" : "Start",
1669 link_id, priv->sta_asleep_mask);
1670
1671 __cw1200_sta_notify(priv->hw, priv->vif,
1672 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1673 }
1674
1675 static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1676 {
1677 struct sk_buff *skb;
1678 struct wsm_update_ie update_ie = {
1679 .what = WSM_UPDATE_IE_BEACON,
1680 .count = 1,
1681 };
1682 u16 tim_offset, tim_length;
1683
1684 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1685
1686 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1687 &tim_offset, &tim_length);
1688 if (!skb) {
1689 if (!__cw1200_flush(priv, true))
1690 wsm_unlock_tx(priv);
1691 return -ENOENT;
1692 }
1693
1694 if (tim_offset && tim_length >= 6) {
1695 /* Ignore DTIM count from mac80211:
1696 * firmware handles DTIM internally.
1697 */
1698 skb->data[tim_offset + 2] = 0;
1699
1700 /* Set/reset aid0 bit */
1701 if (aid0_bit_set)
1702 skb->data[tim_offset + 4] |= 1;
1703 else
1704 skb->data[tim_offset + 4] &= ~1;
1705 }
1706
1707 update_ie.ies = &skb->data[tim_offset];
1708 update_ie.length = tim_length;
1709 wsm_update_ie(priv, &update_ie);
1710
1711 dev_kfree_skb(skb);
1712
1713 return 0;
1714 }
1715
1716 void cw1200_set_tim_work(struct work_struct *work)
1717 {
1718 struct cw1200_common *priv =
1719 container_of(work, struct cw1200_common, set_tim_work);
1720 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1721 }
1722
1723 int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1724 bool set)
1725 {
1726 struct cw1200_common *priv = dev->priv;
1727 queue_work(priv->workqueue, &priv->set_tim_work);
1728 return 0;
1729 }
1730
1731 void cw1200_set_cts_work(struct work_struct *work)
1732 {
1733 struct cw1200_common *priv =
1734 container_of(work, struct cw1200_common, set_cts_work);
1735
1736 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1737 struct wsm_update_ie update_ie = {
1738 .what = WSM_UPDATE_IE_BEACON,
1739 .count = 1,
1740 .ies = erp_ie,
1741 .length = 3,
1742 };
1743 u32 erp_info;
1744 __le32 use_cts_prot;
1745 mutex_lock(&priv->conf_mutex);
1746 erp_info = priv->erp_info;
1747 mutex_unlock(&priv->conf_mutex);
1748 use_cts_prot =
1749 erp_info & WLAN_ERP_USE_PROTECTION ?
1750 __cpu_to_le32(1) : 0;
1751
1752 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1753
1754 pr_debug("[STA] ERP information 0x%x\n", erp_info);
1755
1756 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1757 &use_cts_prot, sizeof(use_cts_prot));
1758 wsm_update_ie(priv, &update_ie);
1759
1760 return;
1761 }
1762
1763 static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1764 {
1765 struct wsm_override_internal_txrate arg;
1766 int ret = 0;
1767
1768 if (priv->mode == NL80211_IFTYPE_STATION) {
1769 /* Plumb PSPOLL and NULL template */
1770 cw1200_upload_pspoll(priv);
1771 cw1200_upload_null(priv);
1772 cw1200_upload_qosnull(priv);
1773 } else {
1774 return 0;
1775 }
1776
1777 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1778
1779 if (!priv->vif->p2p) {
1780 /* STATION mode */
1781 if (priv->bss_params.operational_rate_set & ~0xF) {
1782 pr_debug("[STA] STA has ERP rates\n");
1783 /* G or BG mode */
1784 arg.internalTxRate = (__ffs(
1785 priv->bss_params.operational_rate_set & ~0xF));
1786 } else {
1787 pr_debug("[STA] STA has non ERP rates\n");
1788 /* B only mode */
1789 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1790 }
1791 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1792 } else {
1793 /* P2P mode */
1794 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1795 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1796 }
1797
1798 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1799 priv->mode,
1800 arg.internalTxRate,
1801 arg.nonErpInternalTxRate);
1802
1803 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1804 &arg, sizeof(arg));
1805
1806 return ret;
1807 }
1808
1809 void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1810 struct ieee80211_vif *vif,
1811 struct ieee80211_bss_conf *info,
1812 u32 changed)
1813 {
1814 struct cw1200_common *priv = dev->priv;
1815 bool do_join = false;
1816
1817 mutex_lock(&priv->conf_mutex);
1818
1819 pr_debug("BSS CHANGED: %08x\n", changed);
1820
1821 /* TODO: BSS_CHANGED_QOS */
1822 /* TODO: BSS_CHANGED_TXPOWER */
1823
1824 if (changed & BSS_CHANGED_ARP_FILTER) {
1825 struct wsm_mib_arp_ipv4_filter filter = {0};
1826 int i;
1827
1828 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1829 info->arp_addr_cnt);
1830
1831 /* Currently only one IP address is supported by firmware.
1832 * In case of more IPs arp filtering will be disabled.
1833 */
1834 if (info->arp_addr_cnt > 0 &&
1835 info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1836 for (i = 0; i < info->arp_addr_cnt; i++) {
1837 filter.ipv4addrs[i] = info->arp_addr_list[i];
1838 pr_debug("[STA] addr[%d]: 0x%X\n",
1839 i, filter.ipv4addrs[i]);
1840 }
1841 filter.enable = __cpu_to_le32(1);
1842 }
1843
1844 pr_debug("[STA] arp ip filter enable: %d\n",
1845 __le32_to_cpu(filter.enable));
1846
1847 wsm_set_arp_ipv4_filter(priv, &filter);
1848 }
1849
1850 if (changed &
1851 (BSS_CHANGED_BEACON |
1852 BSS_CHANGED_AP_PROBE_RESP |
1853 BSS_CHANGED_BSSID |
1854 BSS_CHANGED_SSID |
1855 BSS_CHANGED_IBSS)) {
1856 pr_debug("BSS_CHANGED_BEACON\n");
1857 priv->beacon_int = info->beacon_int;
1858 cw1200_update_beaconing(priv);
1859 cw1200_upload_beacon(priv);
1860 }
1861
1862 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1863 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1864
1865 if (priv->enable_beacon != info->enable_beacon) {
1866 cw1200_enable_beaconing(priv, info->enable_beacon);
1867 priv->enable_beacon = info->enable_beacon;
1868 }
1869 }
1870
1871 if (changed & BSS_CHANGED_BEACON_INT) {
1872 pr_debug("CHANGED_BEACON_INT\n");
1873 if (info->ibss_joined)
1874 do_join = true;
1875 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1876 cw1200_update_beaconing(priv);
1877 }
1878
1879 /* assoc/disassoc, or maybe AID changed */
1880 if (changed & BSS_CHANGED_ASSOC) {
1881 wsm_lock_tx(priv);
1882 priv->wep_default_key_id = -1;
1883 wsm_unlock_tx(priv);
1884 }
1885
1886 if (changed & BSS_CHANGED_BSSID) {
1887 pr_debug("BSS_CHANGED_BSSID\n");
1888 do_join = true;
1889 }
1890
1891 if (changed &
1892 (BSS_CHANGED_ASSOC |
1893 BSS_CHANGED_BSSID |
1894 BSS_CHANGED_IBSS |
1895 BSS_CHANGED_BASIC_RATES |
1896 BSS_CHANGED_HT)) {
1897 pr_debug("BSS_CHANGED_ASSOC\n");
1898 if (info->assoc) {
1899 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1900 ieee80211_connection_loss(vif);
1901 mutex_unlock(&priv->conf_mutex);
1902 return;
1903 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1904 priv->join_status = CW1200_JOIN_STATUS_STA;
1905 }
1906 } else {
1907 do_join = true;
1908 }
1909
1910 if (info->assoc || info->ibss_joined) {
1911 struct ieee80211_sta *sta = NULL;
1912 __le32 htprot = 0;
1913
1914 if (info->dtim_period)
1915 priv->join_dtim_period = info->dtim_period;
1916 priv->beacon_int = info->beacon_int;
1917
1918 rcu_read_lock();
1919
1920 if (info->bssid && !info->ibss_joined)
1921 sta = ieee80211_find_sta(vif, info->bssid);
1922 if (sta) {
1923 priv->ht_info.ht_cap = sta->ht_cap;
1924 priv->bss_params.operational_rate_set =
1925 cw1200_rate_mask_to_wsm(priv,
1926 sta->supp_rates[priv->channel->band]);
1927 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1928 priv->ht_info.operation_mode = info->ht_operation_mode;
1929 } else {
1930 memset(&priv->ht_info, 0,
1931 sizeof(priv->ht_info));
1932 priv->bss_params.operational_rate_set = -1;
1933 }
1934 rcu_read_unlock();
1935
1936 /* Non Greenfield stations present */
1937 if (priv->ht_info.operation_mode &
1938 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1939 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1940
1941 /* Set HT protection method */
1942 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1943
1944 /* TODO:
1945 * STBC_param.dual_cts
1946 * STBC_param.LSIG_TXOP_FILL
1947 */
1948
1949 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1950 &htprot, sizeof(htprot));
1951
1952 priv->association_mode.greenfield =
1953 cw1200_ht_greenfield(&priv->ht_info);
1954 priv->association_mode.flags =
1955 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1956 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1957 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1958 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1959 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1960 priv->association_mode.preamble =
1961 info->use_short_preamble ?
1962 WSM_JOIN_PREAMBLE_SHORT :
1963 WSM_JOIN_PREAMBLE_LONG;
1964 priv->association_mode.basic_rate_set = __cpu_to_le32(
1965 cw1200_rate_mask_to_wsm(priv,
1966 info->basic_rates));
1967 priv->association_mode.mpdu_start_spacing =
1968 cw1200_ht_ampdu_density(&priv->ht_info);
1969
1970 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1971 cancel_work_sync(&priv->unjoin_work);
1972
1973 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1974 priv->bss_params.aid = info->aid;
1975
1976 if (priv->join_dtim_period < 1)
1977 priv->join_dtim_period = 1;
1978
1979 pr_debug("[STA] DTIM %d, interval: %d\n",
1980 priv->join_dtim_period, priv->beacon_int);
1981 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1982 priv->association_mode.preamble,
1983 priv->association_mode.greenfield,
1984 priv->bss_params.aid,
1985 priv->bss_params.operational_rate_set,
1986 priv->association_mode.basic_rate_set);
1987 wsm_set_association_mode(priv, &priv->association_mode);
1988
1989 if (!info->ibss_joined) {
1990 wsm_keep_alive_period(priv, 30 /* sec */);
1991 wsm_set_bss_params(priv, &priv->bss_params);
1992 priv->setbssparams_done = true;
1993 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1994 cw1200_set_pm(priv, &priv->powersave_mode);
1995 }
1996 if (priv->vif->p2p) {
1997 pr_debug("[STA] Setting p2p powersave configuration.\n");
1998 wsm_set_p2p_ps_modeinfo(priv,
1999 &priv->p2p_ps_modeinfo);
2000 }
2001 if (priv->bt_present)
2002 cw1200_set_btcoexinfo(priv);
2003 } else {
2004 memset(&priv->association_mode, 0,
2005 sizeof(priv->association_mode));
2006 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
2007 }
2008 }
2009
2010 /* ERP Protection */
2011 if (changed & (BSS_CHANGED_ASSOC |
2012 BSS_CHANGED_ERP_CTS_PROT |
2013 BSS_CHANGED_ERP_PREAMBLE)) {
2014 u32 prev_erp_info = priv->erp_info;
2015 if (info->use_cts_prot)
2016 priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2017 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2018 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2019
2020 if (info->use_short_preamble)
2021 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2022 else
2023 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2024
2025 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2026
2027 if (prev_erp_info != priv->erp_info)
2028 queue_work(priv->workqueue, &priv->set_cts_work);
2029 }
2030
2031 /* ERP Slottime */
2032 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2033 __le32 slot_time = info->use_short_slot ?
2034 __cpu_to_le32(9) : __cpu_to_le32(20);
2035 pr_debug("[STA] Slot time: %d us.\n",
2036 __le32_to_cpu(slot_time));
2037 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2038 &slot_time, sizeof(slot_time));
2039 }
2040
2041 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2042 struct wsm_rcpi_rssi_threshold threshold = {
2043 .rollingAverageCount = 8,
2044 };
2045 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2046 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2047 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2048 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2049
2050 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2051 /* RSSI subscription enabled */
2052 /* TODO: It's not a correct way of setting threshold.
2053 * Upper and lower must be set equal here and adjusted
2054 * in callback. However current implementation is much
2055 * more relaible and stable.
2056 */
2057
2058 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2059 * RSSI = RCPI / 2 - 110
2060 */
2061 if (priv->cqm_use_rssi) {
2062 threshold.upperThreshold =
2063 info->cqm_rssi_thold + info->cqm_rssi_hyst;
2064 threshold.lowerThreshold =
2065 info->cqm_rssi_thold;
2066 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2067 } else {
2068 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2069 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2070 }
2071 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2072 } else {
2073 /* There is a bug in FW, see sta.c. We have to enable
2074 * dummy subscription to get correct RSSI values.
2075 */
2076 threshold.rssiRcpiMode |=
2077 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2078 WSM_RCPI_RSSI_DONT_USE_UPPER |
2079 WSM_RCPI_RSSI_DONT_USE_LOWER;
2080 if (priv->cqm_use_rssi)
2081 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2082 }
2083 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2084 }
2085 mutex_unlock(&priv->conf_mutex);
2086
2087 if (do_join) {
2088 wsm_lock_tx(priv);
2089 cw1200_do_join(priv); /* Will unlock it for us */
2090 }
2091 }
2092
2093 void cw1200_multicast_start_work(struct work_struct *work)
2094 {
2095 struct cw1200_common *priv =
2096 container_of(work, struct cw1200_common, multicast_start_work);
2097 long tmo = priv->join_dtim_period *
2098 (priv->beacon_int + 20) * HZ / 1024;
2099
2100 cancel_work_sync(&priv->multicast_stop_work);
2101
2102 if (!priv->aid0_bit_set) {
2103 wsm_lock_tx(priv);
2104 cw1200_set_tim_impl(priv, true);
2105 priv->aid0_bit_set = true;
2106 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2107 wsm_unlock_tx(priv);
2108 }
2109 }
2110
2111 void cw1200_multicast_stop_work(struct work_struct *work)
2112 {
2113 struct cw1200_common *priv =
2114 container_of(work, struct cw1200_common, multicast_stop_work);
2115
2116 if (priv->aid0_bit_set) {
2117 del_timer_sync(&priv->mcast_timeout);
2118 wsm_lock_tx(priv);
2119 priv->aid0_bit_set = false;
2120 cw1200_set_tim_impl(priv, false);
2121 wsm_unlock_tx(priv);
2122 }
2123 }
2124
2125 void cw1200_mcast_timeout(unsigned long arg)
2126 {
2127 struct cw1200_common *priv =
2128 (struct cw1200_common *)arg;
2129
2130 wiphy_warn(priv->hw->wiphy,
2131 "Multicast delivery timeout.\n");
2132 spin_lock_bh(&priv->ps_state_lock);
2133 priv->tx_multicast = priv->aid0_bit_set &&
2134 priv->buffered_multicasts;
2135 if (priv->tx_multicast)
2136 cw1200_bh_wakeup(priv);
2137 spin_unlock_bh(&priv->ps_state_lock);
2138 }
2139
2140 int cw1200_ampdu_action(struct ieee80211_hw *hw,
2141 struct ieee80211_vif *vif,
2142 enum ieee80211_ampdu_mlme_action action,
2143 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2144 u8 buf_size)
2145 {
2146 /* Aggregation is implemented fully in firmware,
2147 * including block ack negotiation. Do not allow
2148 * mac80211 stack to do anything: it interferes with
2149 * the firmware.
2150 */
2151
2152 /* Note that we still need this function stubbed. */
2153 return -ENOTSUPP;
2154 }
2155
2156 /* ******************************************************************** */
2157 /* WSM callback */
2158 void cw1200_suspend_resume(struct cw1200_common *priv,
2159 struct wsm_suspend_resume *arg)
2160 {
2161 pr_debug("[AP] %s: %s\n",
2162 arg->stop ? "stop" : "start",
2163 arg->multicast ? "broadcast" : "unicast");
2164
2165 if (arg->multicast) {
2166 bool cancel_tmo = false;
2167 spin_lock_bh(&priv->ps_state_lock);
2168 if (arg->stop) {
2169 priv->tx_multicast = false;
2170 } else {
2171 /* Firmware sends this indication every DTIM if there
2172 * is a STA in powersave connected. There is no reason
2173 * to suspend, following wakeup will consume much more
2174 * power than it could be saved.
2175 */
2176 cw1200_pm_stay_awake(&priv->pm_state,
2177 priv->join_dtim_period *
2178 (priv->beacon_int + 20) * HZ / 1024);
2179 priv->tx_multicast = (priv->aid0_bit_set &&
2180 priv->buffered_multicasts);
2181 if (priv->tx_multicast) {
2182 cancel_tmo = true;
2183 cw1200_bh_wakeup(priv);
2184 }
2185 }
2186 spin_unlock_bh(&priv->ps_state_lock);
2187 if (cancel_tmo)
2188 del_timer_sync(&priv->mcast_timeout);
2189 } else {
2190 spin_lock_bh(&priv->ps_state_lock);
2191 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2192 spin_unlock_bh(&priv->ps_state_lock);
2193 if (!arg->stop)
2194 cw1200_bh_wakeup(priv);
2195 }
2196 return;
2197 }
2198
2199 /* ******************************************************************** */
2200 /* AP privates */
2201
2202 static int cw1200_upload_beacon(struct cw1200_common *priv)
2203 {
2204 int ret = 0;
2205 struct ieee80211_mgmt *mgmt;
2206 struct wsm_template_frame frame = {
2207 .frame_type = WSM_FRAME_TYPE_BEACON,
2208 };
2209
2210 u16 tim_offset;
2211 u16 tim_len;
2212
2213 if (priv->mode == NL80211_IFTYPE_STATION ||
2214 priv->mode == NL80211_IFTYPE_MONITOR ||
2215 priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2216 goto done;
2217
2218 if (priv->vif->p2p)
2219 frame.rate = WSM_TRANSMIT_RATE_6;
2220
2221 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2222 &tim_offset, &tim_len);
2223 if (!frame.skb)
2224 return -ENOMEM;
2225
2226 ret = wsm_set_template_frame(priv, &frame);
2227
2228 if (ret)
2229 goto done;
2230
2231 /* TODO: Distill probe resp; remove TIM
2232 * and any other beacon-specific IEs
2233 */
2234 mgmt = (void *)frame.skb->data;
2235 mgmt->frame_control =
2236 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2237 IEEE80211_STYPE_PROBE_RESP);
2238
2239 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2240 if (priv->vif->p2p) {
2241 ret = wsm_set_probe_responder(priv, true);
2242 } else {
2243 ret = wsm_set_template_frame(priv, &frame);
2244 wsm_set_probe_responder(priv, false);
2245 }
2246
2247 done:
2248 dev_kfree_skb(frame.skb);
2249
2250 return ret;
2251 }
2252
2253 static int cw1200_upload_pspoll(struct cw1200_common *priv)
2254 {
2255 int ret = 0;
2256 struct wsm_template_frame frame = {
2257 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2258 .rate = 0xFF,
2259 };
2260
2261
2262 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2263 if (!frame.skb)
2264 return -ENOMEM;
2265
2266 ret = wsm_set_template_frame(priv, &frame);
2267
2268 dev_kfree_skb(frame.skb);
2269
2270 return ret;
2271 }
2272
2273 static int cw1200_upload_null(struct cw1200_common *priv)
2274 {
2275 int ret = 0;
2276 struct wsm_template_frame frame = {
2277 .frame_type = WSM_FRAME_TYPE_NULL,
2278 .rate = 0xFF,
2279 };
2280
2281 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
2282 if (!frame.skb)
2283 return -ENOMEM;
2284
2285 ret = wsm_set_template_frame(priv, &frame);
2286
2287 dev_kfree_skb(frame.skb);
2288
2289 return ret;
2290 }
2291
2292 static int cw1200_upload_qosnull(struct cw1200_common *priv)
2293 {
2294 /* TODO: This needs to be implemented
2295
2296 struct wsm_template_frame frame = {
2297 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2298 .rate = 0xFF,
2299 };
2300
2301 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2302 if (!frame.skb)
2303 return -ENOMEM;
2304
2305 ret = wsm_set_template_frame(priv, &frame);
2306
2307 dev_kfree_skb(frame.skb);
2308
2309 */
2310 return 0;
2311 }
2312
2313 static int cw1200_enable_beaconing(struct cw1200_common *priv,
2314 bool enable)
2315 {
2316 struct wsm_beacon_transmit transmit = {
2317 .enable_beaconing = enable,
2318 };
2319
2320 return wsm_beacon_transmit(priv, &transmit);
2321 }
2322
2323 static int cw1200_start_ap(struct cw1200_common *priv)
2324 {
2325 int ret;
2326 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2327 struct wsm_start start = {
2328 .mode = priv->vif->p2p ?
2329 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2330 .band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
2331 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2332 .channel_number = priv->channel->hw_value,
2333 .beacon_interval = conf->beacon_int,
2334 .dtim_period = conf->dtim_period,
2335 .preamble = conf->use_short_preamble ?
2336 WSM_JOIN_PREAMBLE_SHORT :
2337 WSM_JOIN_PREAMBLE_LONG,
2338 .probe_delay = 100,
2339 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2340 conf->basic_rates),
2341 };
2342 struct wsm_operational_mode mode = {
2343 .power_mode = cw1200_power_mode,
2344 .disable_more_flag_usage = true,
2345 };
2346
2347 memset(start.ssid, 0, sizeof(start.ssid));
2348 if (!conf->hidden_ssid) {
2349 start.ssid_len = conf->ssid_len;
2350 memcpy(start.ssid, conf->ssid, start.ssid_len);
2351 }
2352
2353 priv->beacon_int = conf->beacon_int;
2354 priv->join_dtim_period = conf->dtim_period;
2355
2356 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2357
2358 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2359 start.channel_number, start.band,
2360 start.beacon_interval, start.dtim_period,
2361 start.basic_rate_set,
2362 start.ssid_len, start.ssid);
2363 ret = wsm_start(priv, &start);
2364 if (!ret)
2365 ret = cw1200_upload_keys(priv);
2366 if (!ret && priv->vif->p2p) {
2367 pr_debug("[AP] Setting p2p powersave configuration.\n");
2368 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2369 }
2370 if (!ret) {
2371 wsm_set_block_ack_policy(priv, 0, 0);
2372 priv->join_status = CW1200_JOIN_STATUS_AP;
2373 cw1200_update_filtering(priv);
2374 }
2375 wsm_set_operational_mode(priv, &mode);
2376 return ret;
2377 }
2378
2379 static int cw1200_update_beaconing(struct cw1200_common *priv)
2380 {
2381 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2382 struct wsm_reset reset = {
2383 .link_id = 0,
2384 .reset_statistics = true,
2385 };
2386
2387 if (priv->mode == NL80211_IFTYPE_AP) {
2388 /* TODO: check if changed channel, band */
2389 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2390 priv->beacon_int != conf->beacon_int) {
2391 pr_debug("ap restarting\n");
2392 wsm_lock_tx(priv);
2393 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2394 wsm_reset(priv, &reset);
2395 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2396 cw1200_start_ap(priv);
2397 wsm_unlock_tx(priv);
2398 } else
2399 pr_debug("ap started join_status: %d\n",
2400 priv->join_status);
2401 }
2402 return 0;
2403 }
Linux kernel - Deliverables
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