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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Mac80211 STA API for ST-Ericsson CW1200 drivers
4 *
5 * Copyright (c) 2010, ST-Ericsson
6 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
7 */
8
9#include <linux/vmalloc.h>
10#include <linux/sched.h>
11#include <linux/firmware.h>
12#include <linux/module.h>
13#include <linux/etherdevice.h>
14
15#include "cw1200.h"
16#include "sta.h"
17#include "fwio.h"
18#include "bh.h"
19#include "debug.h"
20
21#ifndef ERP_INFO_BYTE_OFFSET
22#define ERP_INFO_BYTE_OFFSET 2
23#endif
24
25static void cw1200_do_join(struct cw1200_common *priv);
26static void cw1200_do_unjoin(struct cw1200_common *priv);
27
28static int cw1200_upload_beacon(struct cw1200_common *priv);
29static int cw1200_upload_pspoll(struct cw1200_common *priv);
30static int cw1200_upload_null(struct cw1200_common *priv);
31static int cw1200_upload_qosnull(struct cw1200_common *priv);
32static int cw1200_start_ap(struct cw1200_common *priv);
33static int cw1200_update_beaconing(struct cw1200_common *priv);
34static int cw1200_enable_beaconing(struct cw1200_common *priv,
35 bool enable);
36static void __cw1200_sta_notify(struct ieee80211_hw *dev,
37 struct ieee80211_vif *vif,
38 enum sta_notify_cmd notify_cmd,
39 int link_id);
40static int __cw1200_flush(struct cw1200_common *priv, bool drop);
41
42static inline void __cw1200_free_event_queue(struct list_head *list)
43{
44 struct cw1200_wsm_event *event, *tmp;
45 list_for_each_entry_safe(event, tmp, list, link) {
46 list_del(&event->link);
47 kfree(event);
48 }
49}
50
51/* ******************************************************************** */
52/* STA API */
53
54int cw1200_start(struct ieee80211_hw *dev)
55{
56 struct cw1200_common *priv = dev->priv;
57 int ret = 0;
58
59 cw1200_pm_stay_awake(&priv->pm_state, HZ);
60
61 mutex_lock(&priv->conf_mutex);
62
63 /* default EDCA */
64 WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
65 WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
66 WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
67 WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
68 ret = wsm_set_edca_params(priv, &priv->edca);
69 if (ret)
70 goto out;
71
72 ret = cw1200_set_uapsd_param(priv, &priv->edca);
73 if (ret)
74 goto out;
75
76 priv->setbssparams_done = false;
77
78 memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
79 priv->mode = NL80211_IFTYPE_MONITOR;
80 priv->wep_default_key_id = -1;
81
82 priv->cqm_beacon_loss_count = 10;
83
84 ret = cw1200_setup_mac(priv);
85 if (ret)
86 goto out;
87
88out:
89 mutex_unlock(&priv->conf_mutex);
90 return ret;
91}
92
93void cw1200_stop(struct ieee80211_hw *dev, bool suspend)
94{
95 struct cw1200_common *priv = dev->priv;
96 LIST_HEAD(list);
97 int i;
98
99 wsm_lock_tx(priv);
100
101 while (down_trylock(&priv->scan.lock)) {
102 /* Scan is in progress. Force it to stop. */
103 priv->scan.req = NULL;
104 schedule();
105 }
106 up(&priv->scan.lock);
107
108 cancel_delayed_work_sync(&priv->scan.probe_work);
109 cancel_delayed_work_sync(&priv->scan.timeout);
110 cancel_delayed_work_sync(&priv->clear_recent_scan_work);
111 cancel_delayed_work_sync(&priv->join_timeout);
112 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
113 cancel_work_sync(&priv->unjoin_work);
114 cancel_delayed_work_sync(&priv->link_id_gc_work);
115 flush_workqueue(priv->workqueue);
116 del_timer_sync(&priv->mcast_timeout);
117 mutex_lock(&priv->conf_mutex);
118 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
119 priv->listening = false;
120
121 spin_lock(&priv->event_queue_lock);
122 list_splice_init(&priv->event_queue, &list);
123 spin_unlock(&priv->event_queue_lock);
124 __cw1200_free_event_queue(&list);
125
126
127 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
128 priv->join_pending = false;
129
130 for (i = 0; i < 4; i++)
131 cw1200_queue_clear(&priv->tx_queue[i]);
132 mutex_unlock(&priv->conf_mutex);
133 tx_policy_clean(priv);
134
135 /* HACK! */
136 if (atomic_xchg(&priv->tx_lock, 1) != 1)
137 pr_debug("[STA] TX is force-unlocked due to stop request.\n");
138
139 wsm_unlock_tx(priv);
140 atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
141}
142
143static int cw1200_bssloss_mitigation = 1;
144module_param(cw1200_bssloss_mitigation, int, 0644);
145MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
146
147
148void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
149 int init, int good, int bad)
150{
151 int tx = 0;
152
153 priv->delayed_link_loss = 0;
154 cancel_work_sync(&priv->bss_params_work);
155
156 pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
157 priv->bss_loss_state,
158 init, good, bad,
159 atomic_read(&priv->tx_lock),
160 priv->delayed_unjoin);
161
162 /* If we have a pending unjoin */
163 if (priv->delayed_unjoin)
164 return;
165
166 if (init) {
167 queue_delayed_work(priv->workqueue,
168 &priv->bss_loss_work,
169 HZ);
170 priv->bss_loss_state = 0;
171
172 /* Skip the confimration procedure in P2P case */
173 if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
174 tx = 1;
175 } else if (good) {
176 cancel_delayed_work_sync(&priv->bss_loss_work);
177 priv->bss_loss_state = 0;
178 queue_work(priv->workqueue, &priv->bss_params_work);
179 } else if (bad) {
180 /* XXX Should we just keep going until we time out? */
181 if (priv->bss_loss_state < 3)
182 tx = 1;
183 } else {
184 cancel_delayed_work_sync(&priv->bss_loss_work);
185 priv->bss_loss_state = 0;
186 }
187
188 /* Bypass mitigation if it's disabled */
189 if (!cw1200_bssloss_mitigation)
190 tx = 0;
191
192 /* Spit out a NULL packet to our AP if necessary */
193 if (tx) {
194 struct sk_buff *skb;
195
196 priv->bss_loss_state++;
197
198 skb = ieee80211_nullfunc_get(priv->hw, priv->vif, -1, false);
199 WARN_ON(!skb);
200 if (skb)
201 cw1200_tx(priv->hw, NULL, skb);
202 }
203}
204
205int cw1200_add_interface(struct ieee80211_hw *dev,
206 struct ieee80211_vif *vif)
207{
208 int ret;
209 struct cw1200_common *priv = dev->priv;
210 /* __le32 auto_calibration_mode = __cpu_to_le32(1); */
211
212 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
213 IEEE80211_VIF_SUPPORTS_UAPSD |
214 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
215
216 mutex_lock(&priv->conf_mutex);
217
218 if (priv->mode != NL80211_IFTYPE_MONITOR) {
219 mutex_unlock(&priv->conf_mutex);
220 return -EOPNOTSUPP;
221 }
222
223 switch (vif->type) {
224 case NL80211_IFTYPE_STATION:
225 case NL80211_IFTYPE_ADHOC:
226 case NL80211_IFTYPE_MESH_POINT:
227 case NL80211_IFTYPE_AP:
228 priv->mode = vif->type;
229 break;
230 default:
231 mutex_unlock(&priv->conf_mutex);
232 return -EOPNOTSUPP;
233 }
234
235 priv->vif = vif;
236 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
237 ret = cw1200_setup_mac(priv);
238 /* Enable auto-calibration */
239 /* Exception in subsequent channel switch; disabled.
240 * wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
241 * &auto_calibration_mode, sizeof(auto_calibration_mode));
242 */
243
244 mutex_unlock(&priv->conf_mutex);
245 return ret;
246}
247
248void cw1200_remove_interface(struct ieee80211_hw *dev,
249 struct ieee80211_vif *vif)
250{
251 struct cw1200_common *priv = dev->priv;
252 struct wsm_reset reset = {
253 .reset_statistics = true,
254 };
255 int i;
256
257 mutex_lock(&priv->conf_mutex);
258 switch (priv->join_status) {
259 case CW1200_JOIN_STATUS_JOINING:
260 case CW1200_JOIN_STATUS_PRE_STA:
261 case CW1200_JOIN_STATUS_STA:
262 case CW1200_JOIN_STATUS_IBSS:
263 wsm_lock_tx(priv);
264 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
265 wsm_unlock_tx(priv);
266 break;
267 case CW1200_JOIN_STATUS_AP:
268 for (i = 0; priv->link_id_map; ++i) {
269 if (priv->link_id_map & BIT(i)) {
270 reset.link_id = i;
271 wsm_reset(priv, &reset);
272 priv->link_id_map &= ~BIT(i);
273 }
274 }
275 memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
276 priv->sta_asleep_mask = 0;
277 priv->enable_beacon = false;
278 priv->tx_multicast = false;
279 priv->aid0_bit_set = false;
280 priv->buffered_multicasts = false;
281 priv->pspoll_mask = 0;
282 reset.link_id = 0;
283 wsm_reset(priv, &reset);
284 break;
285 case CW1200_JOIN_STATUS_MONITOR:
286 cw1200_update_listening(priv, false);
287 break;
288 default:
289 break;
290 }
291 priv->vif = NULL;
292 priv->mode = NL80211_IFTYPE_MONITOR;
293 eth_zero_addr(priv->mac_addr);
294 memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
295 cw1200_free_keys(priv);
296 cw1200_setup_mac(priv);
297 priv->listening = false;
298 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
299 if (!__cw1200_flush(priv, true))
300 wsm_unlock_tx(priv);
301
302 mutex_unlock(&priv->conf_mutex);
303}
304
305int cw1200_change_interface(struct ieee80211_hw *dev,
306 struct ieee80211_vif *vif,
307 enum nl80211_iftype new_type,
308 bool p2p)
309{
310 int ret = 0;
311 pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
312 p2p, vif->type, vif->p2p);
313
314 if (new_type != vif->type || vif->p2p != p2p) {
315 cw1200_remove_interface(dev, vif);
316 vif->type = new_type;
317 vif->p2p = p2p;
318 ret = cw1200_add_interface(dev, vif);
319 }
320
321 return ret;
322}
323
324int cw1200_config(struct ieee80211_hw *dev, u32 changed)
325{
326 int ret = 0;
327 struct cw1200_common *priv = dev->priv;
328 struct ieee80211_conf *conf = &dev->conf;
329
330 pr_debug("CONFIG CHANGED: %08x\n", changed);
331
332 down(&priv->scan.lock);
333 mutex_lock(&priv->conf_mutex);
334 /* TODO: IEEE80211_CONF_CHANGE_QOS */
335 /* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
336
337 if (changed & IEEE80211_CONF_CHANGE_POWER) {
338 priv->output_power = conf->power_level;
339 pr_debug("[STA] TX power: %d\n", priv->output_power);
340 wsm_set_output_power(priv, priv->output_power * 10);
341 }
342
343 if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
344 (priv->channel != conf->chandef.chan)) {
345 struct ieee80211_channel *ch = conf->chandef.chan;
346 struct wsm_switch_channel channel = {
347 .channel_number = ch->hw_value,
348 };
349 pr_debug("[STA] Freq %d (wsm ch: %d).\n",
350 ch->center_freq, ch->hw_value);
351
352 /* __cw1200_flush() implicitly locks tx, if successful */
353 if (!__cw1200_flush(priv, false)) {
354 if (!wsm_switch_channel(priv, &channel)) {
355 ret = wait_event_timeout(priv->channel_switch_done,
356 !priv->channel_switch_in_progress,
357 3 * HZ);
358 if (ret) {
359 /* Already unlocks if successful */
360 priv->channel = ch;
361 ret = 0;
362 } else {
363 ret = -ETIMEDOUT;
364 }
365 } else {
366 /* Unlock if switch channel fails */
367 wsm_unlock_tx(priv);
368 }
369 }
370 }
371
372 if (changed & IEEE80211_CONF_CHANGE_PS) {
373 if (!(conf->flags & IEEE80211_CONF_PS))
374 priv->powersave_mode.mode = WSM_PSM_ACTIVE;
375 else if (conf->dynamic_ps_timeout <= 0)
376 priv->powersave_mode.mode = WSM_PSM_PS;
377 else
378 priv->powersave_mode.mode = WSM_PSM_FAST_PS;
379
380 /* Firmware requires that value for this 1-byte field must
381 * be specified in units of 500us. Values above the 128ms
382 * threshold are not supported.
383 */
384 if (conf->dynamic_ps_timeout >= 0x80)
385 priv->powersave_mode.fast_psm_idle_period = 0xFF;
386 else
387 priv->powersave_mode.fast_psm_idle_period =
388 conf->dynamic_ps_timeout << 1;
389
390 if (priv->join_status == CW1200_JOIN_STATUS_STA &&
391 priv->bss_params.aid)
392 cw1200_set_pm(priv, &priv->powersave_mode);
393 }
394
395 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
396 /* TBD: It looks like it's transparent
397 * there's a monitor interface present -- use this
398 * to determine for example whether to calculate
399 * timestamps for packets or not, do not use instead
400 * of filter flags!
401 */
402 }
403
404 if (changed & IEEE80211_CONF_CHANGE_IDLE) {
405 struct wsm_operational_mode mode = {
406 .power_mode = cw1200_power_mode,
407 .disable_more_flag_usage = true,
408 };
409
410 wsm_lock_tx(priv);
411 /* Disable p2p-dev mode forced by TX request */
412 if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
413 (conf->flags & IEEE80211_CONF_IDLE) &&
414 !priv->listening) {
415 cw1200_disable_listening(priv);
416 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
417 }
418 wsm_set_operational_mode(priv, &mode);
419 wsm_unlock_tx(priv);
420 }
421
422 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
423 pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
424 conf->long_frame_max_tx_count,
425 conf->short_frame_max_tx_count);
426 spin_lock_bh(&priv->tx_policy_cache.lock);
427 priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
428 priv->short_frame_max_tx_count =
429 (conf->short_frame_max_tx_count < 0x0F) ?
430 conf->short_frame_max_tx_count : 0x0F;
431 priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
432 spin_unlock_bh(&priv->tx_policy_cache.lock);
433 }
434 mutex_unlock(&priv->conf_mutex);
435 up(&priv->scan.lock);
436 return ret;
437}
438
439void cw1200_update_filtering(struct cw1200_common *priv)
440{
441 int ret;
442 bool bssid_filtering = !priv->rx_filter.bssid;
443 bool is_p2p = priv->vif && priv->vif->p2p;
444 bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
445
446 static struct wsm_beacon_filter_control bf_ctrl;
447 static struct wsm_mib_beacon_filter_table bf_tbl = {
448 .entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
449 .entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
450 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
451 WSM_BEACON_FILTER_IE_HAS_APPEARED,
452 .entry[0].oui[0] = 0x50,
453 .entry[0].oui[1] = 0x6F,
454 .entry[0].oui[2] = 0x9A,
455 .entry[1].ie_id = WLAN_EID_HT_OPERATION,
456 .entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
457 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
458 WSM_BEACON_FILTER_IE_HAS_APPEARED,
459 .entry[2].ie_id = WLAN_EID_ERP_INFO,
460 .entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
461 WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
462 WSM_BEACON_FILTER_IE_HAS_APPEARED,
463 };
464
465 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
466 return;
467 else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
468 bssid_filtering = false;
469
470 if (priv->disable_beacon_filter) {
471 bf_ctrl.enabled = 0;
472 bf_ctrl.bcn_count = 1;
473 bf_tbl.num = __cpu_to_le32(0);
474 } else if (is_p2p || !is_sta) {
475 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
476 WSM_BEACON_FILTER_AUTO_ERP;
477 bf_ctrl.bcn_count = 0;
478 bf_tbl.num = __cpu_to_le32(2);
479 } else {
480 bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
481 bf_ctrl.bcn_count = 0;
482 bf_tbl.num = __cpu_to_le32(3);
483 }
484
485 /* When acting as p2p client being connected to p2p GO, in order to
486 * receive frames from a different p2p device, turn off bssid filter.
487 *
488 * WARNING: FW dependency!
489 * This can only be used with FW WSM371 and its successors.
490 * In that FW version even with bssid filter turned off,
491 * device will block most of the unwanted frames.
492 */
493 if (is_p2p)
494 bssid_filtering = false;
495
496 ret = wsm_set_rx_filter(priv, &priv->rx_filter);
497 if (!ret)
498 ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
499 if (!ret)
500 ret = wsm_beacon_filter_control(priv, &bf_ctrl);
501 if (!ret)
502 ret = wsm_set_bssid_filtering(priv, bssid_filtering);
503 if (!ret)
504 ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
505 if (ret)
506 wiphy_err(priv->hw->wiphy,
507 "Update filtering failed: %d.\n", ret);
508 return;
509}
510
511void cw1200_update_filtering_work(struct work_struct *work)
512{
513 struct cw1200_common *priv =
514 container_of(work, struct cw1200_common,
515 update_filtering_work);
516
517 cw1200_update_filtering(priv);
518}
519
520void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
521{
522 struct cw1200_common *priv =
523 container_of(work, struct cw1200_common,
524 set_beacon_wakeup_period_work);
525
526 wsm_set_beacon_wakeup_period(priv,
527 priv->beacon_int * priv->join_dtim_period >
528 MAX_BEACON_SKIP_TIME_MS ? 1 :
529 priv->join_dtim_period, 0);
530}
531
532u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
533 struct netdev_hw_addr_list *mc_list)
534{
535 static u8 broadcast_ipv6[ETH_ALEN] = {
536 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
537 };
538 static u8 broadcast_ipv4[ETH_ALEN] = {
539 0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
540 };
541 struct cw1200_common *priv = hw->priv;
542 struct netdev_hw_addr *ha;
543 int count = 0;
544
545 /* Disable multicast filtering */
546 priv->has_multicast_subscription = false;
547 memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
548
549 if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
550 return 0;
551
552 /* Enable if requested */
553 netdev_hw_addr_list_for_each(ha, mc_list) {
554 pr_debug("[STA] multicast: %pM\n", ha->addr);
555 memcpy(&priv->multicast_filter.macaddrs[count],
556 ha->addr, ETH_ALEN);
557 if (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
558 !ether_addr_equal(ha->addr, broadcast_ipv6))
559 priv->has_multicast_subscription = true;
560 count++;
561 }
562
563 if (count) {
564 priv->multicast_filter.enable = __cpu_to_le32(1);
565 priv->multicast_filter.num_addrs = __cpu_to_le32(count);
566 }
567
568 return netdev_hw_addr_list_count(mc_list);
569}
570
571void cw1200_configure_filter(struct ieee80211_hw *dev,
572 unsigned int changed_flags,
573 unsigned int *total_flags,
574 u64 multicast)
575{
576 struct cw1200_common *priv = dev->priv;
577 bool listening = !!(*total_flags &
578 (FIF_OTHER_BSS |
579 FIF_BCN_PRBRESP_PROMISC |
580 FIF_PROBE_REQ));
581
582 *total_flags &= FIF_OTHER_BSS |
583 FIF_FCSFAIL |
584 FIF_BCN_PRBRESP_PROMISC |
585 FIF_PROBE_REQ;
586
587 down(&priv->scan.lock);
588 mutex_lock(&priv->conf_mutex);
589
590 priv->rx_filter.promiscuous = 0;
591 priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
592 FIF_PROBE_REQ)) ? 1 : 0;
593 priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
594 priv->disable_beacon_filter = !(*total_flags &
595 (FIF_BCN_PRBRESP_PROMISC |
596 FIF_PROBE_REQ));
597 if (priv->listening != listening) {
598 priv->listening = listening;
599 wsm_lock_tx(priv);
600 cw1200_update_listening(priv, listening);
601 wsm_unlock_tx(priv);
602 }
603 cw1200_update_filtering(priv);
604 mutex_unlock(&priv->conf_mutex);
605 up(&priv->scan.lock);
606}
607
608int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
609 unsigned int link_id, u16 queue,
610 const struct ieee80211_tx_queue_params *params)
611{
612 struct cw1200_common *priv = dev->priv;
613 int ret = 0;
614 /* To prevent re-applying PM request OID again and again*/
615 bool old_uapsd_flags;
616
617 mutex_lock(&priv->conf_mutex);
618
619 if (queue < dev->queues) {
620 old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
621
622 WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
623 ret = wsm_set_tx_queue_params(priv,
624 &priv->tx_queue_params.params[queue], queue);
625 if (ret) {
626 ret = -EINVAL;
627 goto out;
628 }
629
630 WSM_EDCA_SET(&priv->edca, queue, params->aifs,
631 params->cw_min, params->cw_max,
632 params->txop, 0xc8,
633 params->uapsd);
634 ret = wsm_set_edca_params(priv, &priv->edca);
635 if (ret) {
636 ret = -EINVAL;
637 goto out;
638 }
639
640 if (priv->mode == NL80211_IFTYPE_STATION) {
641 ret = cw1200_set_uapsd_param(priv, &priv->edca);
642 if (!ret && priv->setbssparams_done &&
643 (priv->join_status == CW1200_JOIN_STATUS_STA) &&
644 (old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
645 ret = cw1200_set_pm(priv, &priv->powersave_mode);
646 }
647 } else {
648 ret = -EINVAL;
649 }
650
651out:
652 mutex_unlock(&priv->conf_mutex);
653 return ret;
654}
655
656int cw1200_get_stats(struct ieee80211_hw *dev,
657 struct ieee80211_low_level_stats *stats)
658{
659 struct cw1200_common *priv = dev->priv;
660
661 memcpy(stats, &priv->stats, sizeof(*stats));
662 return 0;
663}
664
665int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
666{
667 struct wsm_set_pm pm = *arg;
668
669 if (priv->uapsd_info.uapsd_flags != 0)
670 pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
671
672 if (memcmp(&pm, &priv->firmware_ps_mode,
673 sizeof(struct wsm_set_pm))) {
674 priv->firmware_ps_mode = pm;
675 return wsm_set_pm(priv, &pm);
676 } else {
677 return 0;
678 }
679}
680
681int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
682 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
683 struct ieee80211_key_conf *key)
684{
685 int ret = -EOPNOTSUPP;
686 struct cw1200_common *priv = dev->priv;
687 struct ieee80211_key_seq seq;
688
689 mutex_lock(&priv->conf_mutex);
690
691 if (cmd == SET_KEY) {
692 u8 *peer_addr = NULL;
693 int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
694 1 : 0;
695 int idx = cw1200_alloc_key(priv);
696 struct wsm_add_key *wsm_key = &priv->keys[idx];
697
698 if (idx < 0) {
699 ret = -EINVAL;
700 goto finally;
701 }
702
703 if (sta)
704 peer_addr = sta->addr;
705
706 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE |
707 IEEE80211_KEY_FLAG_RESERVE_TAILROOM;
708
709 switch (key->cipher) {
710 case WLAN_CIPHER_SUITE_WEP40:
711 case WLAN_CIPHER_SUITE_WEP104:
712 if (key->keylen > 16) {
713 cw1200_free_key(priv, idx);
714 ret = -EINVAL;
715 goto finally;
716 }
717
718 if (pairwise) {
719 wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
720 memcpy(wsm_key->wep_pairwise.peer,
721 peer_addr, ETH_ALEN);
722 memcpy(wsm_key->wep_pairwise.keydata,
723 &key->key[0], key->keylen);
724 wsm_key->wep_pairwise.keylen = key->keylen;
725 } else {
726 wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
727 memcpy(wsm_key->wep_group.keydata,
728 &key->key[0], key->keylen);
729 wsm_key->wep_group.keylen = key->keylen;
730 wsm_key->wep_group.keyid = key->keyidx;
731 }
732 break;
733 case WLAN_CIPHER_SUITE_TKIP:
734 ieee80211_get_key_rx_seq(key, 0, &seq);
735 if (pairwise) {
736 wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
737 memcpy(wsm_key->tkip_pairwise.peer,
738 peer_addr, ETH_ALEN);
739 memcpy(wsm_key->tkip_pairwise.keydata,
740 &key->key[0], 16);
741 memcpy(wsm_key->tkip_pairwise.tx_mic_key,
742 &key->key[16], 8);
743 memcpy(wsm_key->tkip_pairwise.rx_mic_key,
744 &key->key[24], 8);
745 } else {
746 size_t mic_offset =
747 (priv->mode == NL80211_IFTYPE_AP) ?
748 16 : 24;
749 wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
750 memcpy(wsm_key->tkip_group.keydata,
751 &key->key[0], 16);
752 memcpy(wsm_key->tkip_group.rx_mic_key,
753 &key->key[mic_offset], 8);
754
755 wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
756 wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
757 wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
758 wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
759 wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
760 wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
761 wsm_key->tkip_group.rx_seqnum[6] = 0;
762 wsm_key->tkip_group.rx_seqnum[7] = 0;
763
764 wsm_key->tkip_group.keyid = key->keyidx;
765 }
766 break;
767 case WLAN_CIPHER_SUITE_CCMP:
768 ieee80211_get_key_rx_seq(key, 0, &seq);
769 if (pairwise) {
770 wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
771 memcpy(wsm_key->aes_pairwise.peer,
772 peer_addr, ETH_ALEN);
773 memcpy(wsm_key->aes_pairwise.keydata,
774 &key->key[0], 16);
775 } else {
776 wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
777 memcpy(wsm_key->aes_group.keydata,
778 &key->key[0], 16);
779
780 wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
781 wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
782 wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
783 wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
784 wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
785 wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
786 wsm_key->aes_group.rx_seqnum[6] = 0;
787 wsm_key->aes_group.rx_seqnum[7] = 0;
788 wsm_key->aes_group.keyid = key->keyidx;
789 }
790 break;
791 case WLAN_CIPHER_SUITE_SMS4:
792 if (pairwise) {
793 wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
794 memcpy(wsm_key->wapi_pairwise.peer,
795 peer_addr, ETH_ALEN);
796 memcpy(wsm_key->wapi_pairwise.keydata,
797 &key->key[0], 16);
798 memcpy(wsm_key->wapi_pairwise.mic_key,
799 &key->key[16], 16);
800 wsm_key->wapi_pairwise.keyid = key->keyidx;
801 } else {
802 wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
803 memcpy(wsm_key->wapi_group.keydata,
804 &key->key[0], 16);
805 memcpy(wsm_key->wapi_group.mic_key,
806 &key->key[16], 16);
807 wsm_key->wapi_group.keyid = key->keyidx;
808 }
809 break;
810 default:
811 pr_warn("Unhandled key type %d\n", key->cipher);
812 cw1200_free_key(priv, idx);
813 ret = -EOPNOTSUPP;
814 goto finally;
815 }
816 ret = wsm_add_key(priv, wsm_key);
817 if (!ret)
818 key->hw_key_idx = idx;
819 else
820 cw1200_free_key(priv, idx);
821 } else if (cmd == DISABLE_KEY) {
822 struct wsm_remove_key wsm_key = {
823 .index = key->hw_key_idx,
824 };
825
826 if (wsm_key.index > WSM_KEY_MAX_INDEX) {
827 ret = -EINVAL;
828 goto finally;
829 }
830
831 cw1200_free_key(priv, wsm_key.index);
832 ret = wsm_remove_key(priv, &wsm_key);
833 } else {
834 pr_warn("Unhandled key command %d\n", cmd);
835 }
836
837finally:
838 mutex_unlock(&priv->conf_mutex);
839 return ret;
840}
841
842void cw1200_wep_key_work(struct work_struct *work)
843{
844 struct cw1200_common *priv =
845 container_of(work, struct cw1200_common, wep_key_work);
846 u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
847 struct cw1200_queue *queue = &priv->tx_queue[queue_id];
848 __le32 wep_default_key_id = __cpu_to_le32(
849 priv->wep_default_key_id);
850
851 pr_debug("[STA] Setting default WEP key: %d\n",
852 priv->wep_default_key_id);
853 wsm_flush_tx(priv);
854 wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
855 &wep_default_key_id, sizeof(wep_default_key_id));
856 cw1200_queue_requeue(queue, priv->pending_frame_id);
857 wsm_unlock_tx(priv);
858}
859
860int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
861{
862 int ret = 0;
863 __le32 val32;
864 struct cw1200_common *priv = hw->priv;
865
866 if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
867 return 0;
868
869 if (value != (u32) -1)
870 val32 = __cpu_to_le32(value);
871 else
872 val32 = 0; /* disabled */
873
874 if (priv->rts_threshold == value)
875 goto out;
876
877 pr_debug("[STA] Setting RTS threshold: %d\n",
878 priv->rts_threshold);
879
880 /* mutex_lock(&priv->conf_mutex); */
881 ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
882 &val32, sizeof(val32));
883 if (!ret)
884 priv->rts_threshold = value;
885 /* mutex_unlock(&priv->conf_mutex); */
886
887out:
888 return ret;
889}
890
891/* If successful, LOCKS the TX queue! */
892static int __cw1200_flush(struct cw1200_common *priv, bool drop)
893{
894 int i, ret;
895
896 for (;;) {
897 /* TODO: correct flush handling is required when dev_stop.
898 * Temporary workaround: 2s
899 */
900 if (drop) {
901 for (i = 0; i < 4; ++i)
902 cw1200_queue_clear(&priv->tx_queue[i]);
903 } else {
904 ret = wait_event_timeout(
905 priv->tx_queue_stats.wait_link_id_empty,
906 cw1200_queue_stats_is_empty(
907 &priv->tx_queue_stats, -1),
908 2 * HZ);
909 }
910
911 if (!drop && ret <= 0) {
912 ret = -ETIMEDOUT;
913 break;
914 } else {
915 ret = 0;
916 }
917
918 wsm_lock_tx(priv);
919 if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
920 /* Highly unlikely: WSM requeued frames. */
921 wsm_unlock_tx(priv);
922 continue;
923 }
924 break;
925 }
926 return ret;
927}
928
929void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
930 u32 queues, bool drop)
931{
932 struct cw1200_common *priv = hw->priv;
933
934 switch (priv->mode) {
935 case NL80211_IFTYPE_MONITOR:
936 drop = true;
937 break;
938 case NL80211_IFTYPE_AP:
939 if (!priv->enable_beacon)
940 drop = true;
941 break;
942 }
943
944 if (!__cw1200_flush(priv, drop))
945 wsm_unlock_tx(priv);
946
947 return;
948}
949
950/* ******************************************************************** */
951/* WSM callbacks */
952
953void cw1200_free_event_queue(struct cw1200_common *priv)
954{
955 LIST_HEAD(list);
956
957 spin_lock(&priv->event_queue_lock);
958 list_splice_init(&priv->event_queue, &list);
959 spin_unlock(&priv->event_queue_lock);
960
961 __cw1200_free_event_queue(&list);
962}
963
964void cw1200_event_handler(struct work_struct *work)
965{
966 struct cw1200_common *priv =
967 container_of(work, struct cw1200_common, event_handler);
968 struct cw1200_wsm_event *event;
969 LIST_HEAD(list);
970
971 spin_lock(&priv->event_queue_lock);
972 list_splice_init(&priv->event_queue, &list);
973 spin_unlock(&priv->event_queue_lock);
974
975 list_for_each_entry(event, &list, link) {
976 switch (event->evt.id) {
977 case WSM_EVENT_ERROR:
978 pr_err("Unhandled WSM Error from LMAC\n");
979 break;
980 case WSM_EVENT_BSS_LOST:
981 pr_debug("[CQM] BSS lost.\n");
982 cancel_work_sync(&priv->unjoin_work);
983 if (!down_trylock(&priv->scan.lock)) {
984 cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
985 up(&priv->scan.lock);
986 } else {
987 /* Scan is in progress. Delay reporting.
988 * Scan complete will trigger bss_loss_work
989 */
990 priv->delayed_link_loss = 1;
991 /* Also start a watchdog. */
992 queue_delayed_work(priv->workqueue,
993 &priv->bss_loss_work, 5*HZ);
994 }
995 break;
996 case WSM_EVENT_BSS_REGAINED:
997 pr_debug("[CQM] BSS regained.\n");
998 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
999 cancel_work_sync(&priv->unjoin_work);
1000 break;
1001 case WSM_EVENT_RADAR_DETECTED:
1002 wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
1003 break;
1004 case WSM_EVENT_RCPI_RSSI:
1005 {
1006 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
1007 * RSSI = RCPI / 2 - 110
1008 */
1009 int rcpi_rssi = (int)(event->evt.data & 0xFF);
1010 int cqm_evt;
1011 if (priv->cqm_use_rssi)
1012 rcpi_rssi = (s8)rcpi_rssi;
1013 else
1014 rcpi_rssi = rcpi_rssi / 2 - 110;
1015
1016 cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
1017 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
1018 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1019 pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
1020 ieee80211_cqm_rssi_notify(priv->vif, cqm_evt, rcpi_rssi,
1021 GFP_KERNEL);
1022 break;
1023 }
1024 case WSM_EVENT_BT_INACTIVE:
1025 pr_warn("Unhandled BT INACTIVE from LMAC\n");
1026 break;
1027 case WSM_EVENT_BT_ACTIVE:
1028 pr_warn("Unhandled BT ACTIVE from LMAC\n");
1029 break;
1030 }
1031 }
1032 __cw1200_free_event_queue(&list);
1033}
1034
1035void cw1200_bss_loss_work(struct work_struct *work)
1036{
1037 struct cw1200_common *priv =
1038 container_of(work, struct cw1200_common, bss_loss_work.work);
1039
1040 pr_debug("[CQM] Reporting connection loss.\n");
1041 wsm_lock_tx(priv);
1042 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1043 wsm_unlock_tx(priv);
1044}
1045
1046void cw1200_bss_params_work(struct work_struct *work)
1047{
1048 struct cw1200_common *priv =
1049 container_of(work, struct cw1200_common, bss_params_work);
1050 mutex_lock(&priv->conf_mutex);
1051
1052 priv->bss_params.reset_beacon_loss = 1;
1053 wsm_set_bss_params(priv, &priv->bss_params);
1054 priv->bss_params.reset_beacon_loss = 0;
1055
1056 mutex_unlock(&priv->conf_mutex);
1057}
1058
1059/* ******************************************************************** */
1060/* Internal API */
1061
1062/* This function is called to Parse the SDD file
1063 * to extract listen_interval and PTA related information
1064 * sdd is a TLV: u8 id, u8 len, u8 data[]
1065 */
1066static int cw1200_parse_sdd_file(struct cw1200_common *priv)
1067{
1068 const u8 *p = priv->sdd->data;
1069 int ret = 0;
1070
1071 while (p + 2 <= priv->sdd->data + priv->sdd->size) {
1072 if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
1073 pr_warn("Malformed sdd structure\n");
1074 return -1;
1075 }
1076 switch (p[0]) {
1077 case SDD_PTA_CFG_ELT_ID: {
1078 u16 v;
1079 if (p[1] < 4) {
1080 pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
1081 ret = -1;
1082 break;
1083 }
1084 v = le16_to_cpu(*((__le16 *)(p + 2)));
1085 if (!v) /* non-zero means this is enabled */
1086 break;
1087
1088 v = le16_to_cpu(*((__le16 *)(p + 4)));
1089 priv->conf_listen_interval = (v >> 7) & 0x1F;
1090 pr_debug("PTA found; Listen Interval %d\n",
1091 priv->conf_listen_interval);
1092 break;
1093 }
1094 case SDD_REFERENCE_FREQUENCY_ELT_ID: {
1095 u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
1096 if (clk != priv->hw_refclk)
1097 pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
1098 clk, priv->hw_refclk);
1099 break;
1100 }
1101 default:
1102 break;
1103 }
1104 p += p[1] + 2;
1105 }
1106
1107 if (!priv->bt_present) {
1108 pr_debug("PTA element NOT found.\n");
1109 priv->conf_listen_interval = 0;
1110 }
1111 return ret;
1112}
1113
1114int cw1200_setup_mac(struct cw1200_common *priv)
1115{
1116 int ret = 0;
1117
1118 /* NOTE: There is a bug in FW: it reports signal
1119 * as RSSI if RSSI subscription is enabled.
1120 * It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
1121 *
1122 * NOTE2: RSSI based reports have been switched to RCPI, since
1123 * FW has a bug and RSSI reported values are not stable,
1124 * what can lead to signal level oscilations in user-end applications
1125 */
1126 struct wsm_rcpi_rssi_threshold threshold = {
1127 .rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
1128 WSM_RCPI_RSSI_DONT_USE_UPPER |
1129 WSM_RCPI_RSSI_DONT_USE_LOWER,
1130 .rollingAverageCount = 16,
1131 };
1132
1133 struct wsm_configuration cfg = {
1134 .dot11StationId = &priv->mac_addr[0],
1135 };
1136
1137 /* Remember the decission here to make sure, we will handle
1138 * the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
1139 */
1140 if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
1141 priv->cqm_use_rssi = true;
1142
1143 if (!priv->sdd) {
1144 ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
1145 if (ret) {
1146 pr_err("Can't load sdd file %s.\n", priv->sdd_path);
1147 return ret;
1148 }
1149 cw1200_parse_sdd_file(priv);
1150 }
1151
1152 cfg.dpdData = priv->sdd->data;
1153 cfg.dpdData_size = priv->sdd->size;
1154 ret = wsm_configuration(priv, &cfg);
1155 if (ret)
1156 return ret;
1157
1158 /* Configure RSSI/SCPI reporting as RSSI. */
1159 wsm_set_rcpi_rssi_threshold(priv, &threshold);
1160
1161 return 0;
1162}
1163
1164static void cw1200_join_complete(struct cw1200_common *priv)
1165{
1166 pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
1167
1168 priv->join_pending = false;
1169 if (priv->join_complete_status) {
1170 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1171 cw1200_update_listening(priv, priv->listening);
1172 cw1200_do_unjoin(priv);
1173 ieee80211_connection_loss(priv->vif);
1174 } else {
1175 if (priv->mode == NL80211_IFTYPE_ADHOC)
1176 priv->join_status = CW1200_JOIN_STATUS_IBSS;
1177 else
1178 priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
1179 }
1180 wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
1181}
1182
1183void cw1200_join_complete_work(struct work_struct *work)
1184{
1185 struct cw1200_common *priv =
1186 container_of(work, struct cw1200_common, join_complete_work);
1187 mutex_lock(&priv->conf_mutex);
1188 cw1200_join_complete(priv);
1189 mutex_unlock(&priv->conf_mutex);
1190}
1191
1192void cw1200_join_complete_cb(struct cw1200_common *priv,
1193 struct wsm_join_complete *arg)
1194{
1195 pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
1196 arg->status);
1197
1198 if (cancel_delayed_work(&priv->join_timeout)) {
1199 priv->join_complete_status = arg->status;
1200 queue_work(priv->workqueue, &priv->join_complete_work);
1201 }
1202}
1203
1204/* MUST be called with tx_lock held! It will be unlocked for us. */
1205static void cw1200_do_join(struct cw1200_common *priv)
1206{
1207 const u8 *bssid;
1208 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
1209 struct cfg80211_bss *bss = NULL;
1210 struct wsm_protected_mgmt_policy mgmt_policy;
1211 struct wsm_join join = {
1212 .mode = priv->vif->cfg.ibss_joined ?
1213 WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
1214 .preamble_type = WSM_JOIN_PREAMBLE_LONG,
1215 .probe_for_join = 1,
1216 .atim_window = 0,
1217 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
1218 conf->basic_rates),
1219 };
1220 if (delayed_work_pending(&priv->join_timeout)) {
1221 pr_warn("[STA] - Join request already pending, skipping..\n");
1222 wsm_unlock_tx(priv);
1223 return;
1224 }
1225
1226 if (priv->join_status)
1227 cw1200_do_unjoin(priv);
1228
1229 bssid = priv->vif->bss_conf.bssid;
1230
1231 bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel, bssid, NULL, 0,
1232 IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
1233
1234 if (!bss && !priv->vif->cfg.ibss_joined) {
1235 wsm_unlock_tx(priv);
1236 return;
1237 }
1238
1239 mutex_lock(&priv->conf_mutex);
1240
1241 /* Under the conf lock: check scan status and
1242 * bail out if it is in progress.
1243 */
1244 if (atomic_read(&priv->scan.in_progress)) {
1245 wsm_unlock_tx(priv);
1246 goto done_put;
1247 }
1248
1249 priv->join_pending = true;
1250
1251 /* Sanity check basic rates */
1252 if (!join.basic_rate_set)
1253 join.basic_rate_set = 7;
1254
1255 /* Sanity check beacon interval */
1256 if (!priv->beacon_int)
1257 priv->beacon_int = 1;
1258
1259 join.beacon_interval = priv->beacon_int;
1260
1261 /* BT Coex related changes */
1262 if (priv->bt_present) {
1263 if (((priv->conf_listen_interval * 100) %
1264 priv->beacon_int) == 0)
1265 priv->listen_interval =
1266 ((priv->conf_listen_interval * 100) /
1267 priv->beacon_int);
1268 else
1269 priv->listen_interval =
1270 ((priv->conf_listen_interval * 100) /
1271 priv->beacon_int + 1);
1272 }
1273
1274 if (priv->hw->conf.ps_dtim_period)
1275 priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
1276 join.dtim_period = priv->join_dtim_period;
1277
1278 join.channel_number = priv->channel->hw_value;
1279 join.band = (priv->channel->band == NL80211_BAND_5GHZ) ?
1280 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1281
1282 memcpy(join.bssid, bssid, sizeof(join.bssid));
1283
1284 pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
1285 join.bssid,
1286 join.dtim_period, priv->beacon_int);
1287
1288 if (!priv->vif->cfg.ibss_joined) {
1289 const u8 *ssidie;
1290 rcu_read_lock();
1291 ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
1292 if (ssidie) {
1293 join.ssid_len = ssidie[1];
1294 memcpy(join.ssid, &ssidie[2], join.ssid_len);
1295 }
1296 rcu_read_unlock();
1297 }
1298
1299 if (priv->vif->p2p) {
1300 join.flags |= WSM_JOIN_FLAGS_P2P_GO;
1301 join.basic_rate_set =
1302 cw1200_rate_mask_to_wsm(priv, 0xFF0);
1303 }
1304
1305 /* Enable asynchronous join calls */
1306 if (!priv->vif->cfg.ibss_joined) {
1307 join.flags |= WSM_JOIN_FLAGS_FORCE;
1308 join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
1309 }
1310
1311 wsm_flush_tx(priv);
1312
1313 /* Stay Awake for Join and Auth Timeouts and a bit more */
1314 cw1200_pm_stay_awake(&priv->pm_state,
1315 CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
1316
1317 cw1200_update_listening(priv, false);
1318
1319 /* Turn on Block ACKs */
1320 wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
1321 priv->ba_rx_tid_mask);
1322
1323 /* Set up timeout */
1324 if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
1325 priv->join_status = CW1200_JOIN_STATUS_JOINING;
1326 queue_delayed_work(priv->workqueue,
1327 &priv->join_timeout,
1328 CW1200_JOIN_TIMEOUT);
1329 }
1330
1331 /* 802.11w protected mgmt frames */
1332 mgmt_policy.protectedMgmtEnable = 0;
1333 mgmt_policy.unprotectedMgmtFramesAllowed = 1;
1334 mgmt_policy.encryptionForAuthFrame = 1;
1335 wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
1336
1337 /* Perform actual join */
1338 if (wsm_join(priv, &join)) {
1339 pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
1340 cancel_delayed_work_sync(&priv->join_timeout);
1341 cw1200_update_listening(priv, priv->listening);
1342 /* Tx lock still held, unjoin will clear it. */
1343 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1344 wsm_unlock_tx(priv);
1345 } else {
1346 if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
1347 cw1200_join_complete(priv); /* Will clear tx_lock */
1348
1349 /* Upload keys */
1350 cw1200_upload_keys(priv);
1351
1352 /* Due to beacon filtering it is possible that the
1353 * AP's beacon is not known for the mac80211 stack.
1354 * Disable filtering temporary to make sure the stack
1355 * receives at least one
1356 */
1357 priv->disable_beacon_filter = true;
1358 }
1359 cw1200_update_filtering(priv);
1360
1361done_put:
1362 mutex_unlock(&priv->conf_mutex);
1363 if (bss)
1364 cfg80211_put_bss(priv->hw->wiphy, bss);
1365}
1366
1367void cw1200_join_timeout(struct work_struct *work)
1368{
1369 struct cw1200_common *priv =
1370 container_of(work, struct cw1200_common, join_timeout.work);
1371 pr_debug("[WSM] Join timed out.\n");
1372 wsm_lock_tx(priv);
1373 if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
1374 wsm_unlock_tx(priv);
1375}
1376
1377static void cw1200_do_unjoin(struct cw1200_common *priv)
1378{
1379 struct wsm_reset reset = {
1380 .reset_statistics = true,
1381 };
1382
1383 cancel_delayed_work_sync(&priv->join_timeout);
1384
1385 mutex_lock(&priv->conf_mutex);
1386 priv->join_pending = false;
1387
1388 if (atomic_read(&priv->scan.in_progress)) {
1389 if (priv->delayed_unjoin)
1390 wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
1391 else
1392 priv->delayed_unjoin = true;
1393 goto done;
1394 }
1395
1396 priv->delayed_link_loss = false;
1397
1398 if (!priv->join_status)
1399 goto done;
1400
1401 if (priv->join_status == CW1200_JOIN_STATUS_AP)
1402 goto done;
1403
1404 cancel_work_sync(&priv->update_filtering_work);
1405 cancel_work_sync(&priv->set_beacon_wakeup_period_work);
1406 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1407
1408 /* Unjoin is a reset. */
1409 wsm_flush_tx(priv);
1410 wsm_keep_alive_period(priv, 0);
1411 wsm_reset(priv, &reset);
1412 wsm_set_output_power(priv, priv->output_power * 10);
1413 priv->join_dtim_period = 0;
1414 cw1200_setup_mac(priv);
1415 cw1200_free_event_queue(priv);
1416 cancel_work_sync(&priv->event_handler);
1417 cw1200_update_listening(priv, priv->listening);
1418 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1419
1420 /* Disable Block ACKs */
1421 wsm_set_block_ack_policy(priv, 0, 0);
1422
1423 priv->disable_beacon_filter = false;
1424 cw1200_update_filtering(priv);
1425 memset(&priv->association_mode, 0,
1426 sizeof(priv->association_mode));
1427 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1428 priv->setbssparams_done = false;
1429 memset(&priv->firmware_ps_mode, 0,
1430 sizeof(priv->firmware_ps_mode));
1431
1432 pr_debug("[STA] Unjoin completed.\n");
1433
1434done:
1435 mutex_unlock(&priv->conf_mutex);
1436}
1437
1438void cw1200_unjoin_work(struct work_struct *work)
1439{
1440 struct cw1200_common *priv =
1441 container_of(work, struct cw1200_common, unjoin_work);
1442
1443 cw1200_do_unjoin(priv);
1444
1445 /* Tell the stack we're dead */
1446 ieee80211_connection_loss(priv->vif);
1447
1448 wsm_unlock_tx(priv);
1449}
1450
1451int cw1200_enable_listening(struct cw1200_common *priv)
1452{
1453 struct wsm_start start = {
1454 .mode = WSM_START_MODE_P2P_DEV,
1455 .band = WSM_PHY_BAND_2_4G,
1456 .beacon_interval = 100,
1457 .dtim_period = 1,
1458 .probe_delay = 0,
1459 .basic_rate_set = 0x0F,
1460 };
1461
1462 if (priv->channel) {
1463 start.band = priv->channel->band == NL80211_BAND_5GHZ ?
1464 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
1465 start.channel_number = priv->channel->hw_value;
1466 } else {
1467 start.band = WSM_PHY_BAND_2_4G;
1468 start.channel_number = 1;
1469 }
1470
1471 return wsm_start(priv, &start);
1472}
1473
1474int cw1200_disable_listening(struct cw1200_common *priv)
1475{
1476 int ret;
1477 struct wsm_reset reset = {
1478 .reset_statistics = true,
1479 };
1480 ret = wsm_reset(priv, &reset);
1481 return ret;
1482}
1483
1484void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
1485{
1486 if (enabled) {
1487 if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
1488 if (!cw1200_enable_listening(priv))
1489 priv->join_status = CW1200_JOIN_STATUS_MONITOR;
1490 wsm_set_probe_responder(priv, true);
1491 }
1492 } else {
1493 if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
1494 if (!cw1200_disable_listening(priv))
1495 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
1496 wsm_set_probe_responder(priv, false);
1497 }
1498 }
1499}
1500
1501int cw1200_set_uapsd_param(struct cw1200_common *priv,
1502 const struct wsm_edca_params *arg)
1503{
1504 int ret;
1505 u16 uapsd_flags = 0;
1506
1507 /* Here's the mapping AC [queue, bit]
1508 * VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
1509 */
1510
1511 if (arg->uapsd_enable[0])
1512 uapsd_flags |= 1 << 3;
1513
1514 if (arg->uapsd_enable[1])
1515 uapsd_flags |= 1 << 2;
1516
1517 if (arg->uapsd_enable[2])
1518 uapsd_flags |= 1 << 1;
1519
1520 if (arg->uapsd_enable[3])
1521 uapsd_flags |= 1;
1522
1523 /* Currently pseudo U-APSD operation is not supported, so setting
1524 * MinAutoTriggerInterval, MaxAutoTriggerInterval and
1525 * AutoTriggerStep to 0
1526 */
1527
1528 priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
1529 priv->uapsd_info.min_auto_trigger_interval = 0;
1530 priv->uapsd_info.max_auto_trigger_interval = 0;
1531 priv->uapsd_info.auto_trigger_step = 0;
1532
1533 ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
1534 return ret;
1535}
1536
1537/* ******************************************************************** */
1538/* AP API */
1539
1540int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1541 struct ieee80211_sta *sta)
1542{
1543 struct cw1200_common *priv = hw->priv;
1544 struct cw1200_sta_priv *sta_priv =
1545 (struct cw1200_sta_priv *)&sta->drv_priv;
1546 struct cw1200_link_entry *entry;
1547 struct sk_buff *skb;
1548
1549 if (priv->mode != NL80211_IFTYPE_AP)
1550 return 0;
1551
1552 sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
1553 if (WARN_ON(!sta_priv->link_id)) {
1554 wiphy_info(priv->hw->wiphy,
1555 "[AP] No more link IDs available.\n");
1556 return -ENOENT;
1557 }
1558
1559 entry = &priv->link_id_db[sta_priv->link_id - 1];
1560 spin_lock_bh(&priv->ps_state_lock);
1561 if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
1562 IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
1563 priv->sta_asleep_mask |= BIT(sta_priv->link_id);
1564 entry->status = CW1200_LINK_HARD;
1565 while ((skb = skb_dequeue(&entry->rx_queue)))
1566 ieee80211_rx_irqsafe(priv->hw, skb);
1567 spin_unlock_bh(&priv->ps_state_lock);
1568 return 0;
1569}
1570
1571int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1572 struct ieee80211_sta *sta)
1573{
1574 struct cw1200_common *priv = hw->priv;
1575 struct cw1200_sta_priv *sta_priv =
1576 (struct cw1200_sta_priv *)&sta->drv_priv;
1577 struct cw1200_link_entry *entry;
1578
1579 if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
1580 return 0;
1581
1582 entry = &priv->link_id_db[sta_priv->link_id - 1];
1583 spin_lock_bh(&priv->ps_state_lock);
1584 entry->status = CW1200_LINK_RESERVE;
1585 entry->timestamp = jiffies;
1586 wsm_lock_tx_async(priv);
1587 if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
1588 wsm_unlock_tx(priv);
1589 spin_unlock_bh(&priv->ps_state_lock);
1590 flush_workqueue(priv->workqueue);
1591 return 0;
1592}
1593
1594static void __cw1200_sta_notify(struct ieee80211_hw *dev,
1595 struct ieee80211_vif *vif,
1596 enum sta_notify_cmd notify_cmd,
1597 int link_id)
1598{
1599 struct cw1200_common *priv = dev->priv;
1600 u32 bit, prev;
1601
1602 /* Zero link id means "for all link IDs" */
1603 if (link_id)
1604 bit = BIT(link_id);
1605 else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
1606 bit = 0;
1607 else
1608 bit = priv->link_id_map;
1609 prev = priv->sta_asleep_mask & bit;
1610
1611 switch (notify_cmd) {
1612 case STA_NOTIFY_SLEEP:
1613 if (!prev) {
1614 if (priv->buffered_multicasts &&
1615 !priv->sta_asleep_mask)
1616 queue_work(priv->workqueue,
1617 &priv->multicast_start_work);
1618 priv->sta_asleep_mask |= bit;
1619 }
1620 break;
1621 case STA_NOTIFY_AWAKE:
1622 if (prev) {
1623 priv->sta_asleep_mask &= ~bit;
1624 priv->pspoll_mask &= ~bit;
1625 if (priv->tx_multicast && link_id &&
1626 !priv->sta_asleep_mask)
1627 queue_work(priv->workqueue,
1628 &priv->multicast_stop_work);
1629 cw1200_bh_wakeup(priv);
1630 }
1631 break;
1632 }
1633}
1634
1635void cw1200_sta_notify(struct ieee80211_hw *dev,
1636 struct ieee80211_vif *vif,
1637 enum sta_notify_cmd notify_cmd,
1638 struct ieee80211_sta *sta)
1639{
1640 struct cw1200_common *priv = dev->priv;
1641 struct cw1200_sta_priv *sta_priv =
1642 (struct cw1200_sta_priv *)&sta->drv_priv;
1643
1644 spin_lock_bh(&priv->ps_state_lock);
1645 __cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
1646 spin_unlock_bh(&priv->ps_state_lock);
1647}
1648
1649static void cw1200_ps_notify(struct cw1200_common *priv,
1650 int link_id, bool ps)
1651{
1652 if (link_id > CW1200_MAX_STA_IN_AP_MODE)
1653 return;
1654
1655 pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
1656 ps ? "Stop" : "Start",
1657 link_id, priv->sta_asleep_mask);
1658
1659 __cw1200_sta_notify(priv->hw, priv->vif,
1660 ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
1661}
1662
1663static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
1664{
1665 struct sk_buff *skb;
1666 struct wsm_update_ie update_ie = {
1667 .what = WSM_UPDATE_IE_BEACON,
1668 .count = 1,
1669 };
1670 u16 tim_offset, tim_length;
1671
1672 pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
1673
1674 skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
1675 &tim_offset, &tim_length, 0);
1676 if (!skb) {
1677 if (!__cw1200_flush(priv, true))
1678 wsm_unlock_tx(priv);
1679 return -ENOENT;
1680 }
1681
1682 if (tim_offset && tim_length >= 6) {
1683 /* Ignore DTIM count from mac80211:
1684 * firmware handles DTIM internally.
1685 */
1686 skb->data[tim_offset + 2] = 0;
1687
1688 /* Set/reset aid0 bit */
1689 if (aid0_bit_set)
1690 skb->data[tim_offset + 4] |= 1;
1691 else
1692 skb->data[tim_offset + 4] &= ~1;
1693 }
1694
1695 update_ie.ies = &skb->data[tim_offset];
1696 update_ie.length = tim_length;
1697 wsm_update_ie(priv, &update_ie);
1698
1699 dev_kfree_skb(skb);
1700
1701 return 0;
1702}
1703
1704void cw1200_set_tim_work(struct work_struct *work)
1705{
1706 struct cw1200_common *priv =
1707 container_of(work, struct cw1200_common, set_tim_work);
1708 (void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
1709}
1710
1711int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1712 bool set)
1713{
1714 struct cw1200_common *priv = dev->priv;
1715 queue_work(priv->workqueue, &priv->set_tim_work);
1716 return 0;
1717}
1718
1719void cw1200_set_cts_work(struct work_struct *work)
1720{
1721 struct cw1200_common *priv =
1722 container_of(work, struct cw1200_common, set_cts_work);
1723
1724 u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
1725 struct wsm_update_ie update_ie = {
1726 .what = WSM_UPDATE_IE_BEACON,
1727 .count = 1,
1728 .ies = erp_ie,
1729 .length = 3,
1730 };
1731 u32 erp_info;
1732 __le32 use_cts_prot;
1733 mutex_lock(&priv->conf_mutex);
1734 erp_info = priv->erp_info;
1735 mutex_unlock(&priv->conf_mutex);
1736 use_cts_prot =
1737 erp_info & WLAN_ERP_USE_PROTECTION ?
1738 __cpu_to_le32(1) : 0;
1739
1740 erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
1741
1742 pr_debug("[STA] ERP information 0x%x\n", erp_info);
1743
1744 wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
1745 &use_cts_prot, sizeof(use_cts_prot));
1746 wsm_update_ie(priv, &update_ie);
1747
1748 return;
1749}
1750
1751static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
1752{
1753 struct wsm_override_internal_txrate arg;
1754 int ret = 0;
1755
1756 if (priv->mode == NL80211_IFTYPE_STATION) {
1757 /* Plumb PSPOLL and NULL template */
1758 cw1200_upload_pspoll(priv);
1759 cw1200_upload_null(priv);
1760 cw1200_upload_qosnull(priv);
1761 } else {
1762 return 0;
1763 }
1764
1765 memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
1766
1767 if (!priv->vif->p2p) {
1768 /* STATION mode */
1769 if (priv->bss_params.operational_rate_set & ~0xF) {
1770 pr_debug("[STA] STA has ERP rates\n");
1771 /* G or BG mode */
1772 arg.internalTxRate = (__ffs(
1773 priv->bss_params.operational_rate_set & ~0xF));
1774 } else {
1775 pr_debug("[STA] STA has non ERP rates\n");
1776 /* B only mode */
1777 arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1778 }
1779 arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
1780 } else {
1781 /* P2P mode */
1782 arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1783 arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
1784 }
1785
1786 pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
1787 priv->mode,
1788 arg.internalTxRate,
1789 arg.nonErpInternalTxRate);
1790
1791 ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
1792 &arg, sizeof(arg));
1793
1794 return ret;
1795}
1796
1797void cw1200_bss_info_changed(struct ieee80211_hw *dev,
1798 struct ieee80211_vif *vif,
1799 struct ieee80211_bss_conf *info,
1800 u64 changed)
1801{
1802 struct cw1200_common *priv = dev->priv;
1803 bool do_join = false;
1804
1805 mutex_lock(&priv->conf_mutex);
1806
1807 pr_debug("BSS CHANGED: %llx\n", changed);
1808
1809 /* TODO: BSS_CHANGED_QOS */
1810 /* TODO: BSS_CHANGED_TXPOWER */
1811
1812 if (changed & BSS_CHANGED_ARP_FILTER) {
1813 struct wsm_mib_arp_ipv4_filter filter = {0};
1814 int i;
1815
1816 pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
1817 vif->cfg.arp_addr_cnt);
1818
1819 /* Currently only one IP address is supported by firmware.
1820 * In case of more IPs arp filtering will be disabled.
1821 */
1822 if (vif->cfg.arp_addr_cnt > 0 &&
1823 vif->cfg.arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
1824 for (i = 0; i < vif->cfg.arp_addr_cnt; i++) {
1825 filter.ipv4addrs[i] = vif->cfg.arp_addr_list[i];
1826 pr_debug("[STA] addr[%d]: 0x%X\n",
1827 i, filter.ipv4addrs[i]);
1828 }
1829 filter.enable = __cpu_to_le32(1);
1830 }
1831
1832 pr_debug("[STA] arp ip filter enable: %d\n",
1833 __le32_to_cpu(filter.enable));
1834
1835 wsm_set_arp_ipv4_filter(priv, &filter);
1836 }
1837
1838 if (changed &
1839 (BSS_CHANGED_BEACON |
1840 BSS_CHANGED_AP_PROBE_RESP |
1841 BSS_CHANGED_BSSID |
1842 BSS_CHANGED_SSID |
1843 BSS_CHANGED_IBSS)) {
1844 pr_debug("BSS_CHANGED_BEACON\n");
1845 priv->beacon_int = info->beacon_int;
1846 cw1200_update_beaconing(priv);
1847 cw1200_upload_beacon(priv);
1848 }
1849
1850 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1851 pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
1852
1853 if (priv->enable_beacon != info->enable_beacon) {
1854 cw1200_enable_beaconing(priv, info->enable_beacon);
1855 priv->enable_beacon = info->enable_beacon;
1856 }
1857 }
1858
1859 if (changed & BSS_CHANGED_BEACON_INT) {
1860 pr_debug("CHANGED_BEACON_INT\n");
1861 if (vif->cfg.ibss_joined)
1862 do_join = true;
1863 else if (priv->join_status == CW1200_JOIN_STATUS_AP)
1864 cw1200_update_beaconing(priv);
1865 }
1866
1867 /* assoc/disassoc, or maybe AID changed */
1868 if (changed & BSS_CHANGED_ASSOC) {
1869 wsm_lock_tx(priv);
1870 priv->wep_default_key_id = -1;
1871 wsm_unlock_tx(priv);
1872 }
1873
1874 if (changed & BSS_CHANGED_BSSID) {
1875 pr_debug("BSS_CHANGED_BSSID\n");
1876 do_join = true;
1877 }
1878
1879 if (changed &
1880 (BSS_CHANGED_ASSOC |
1881 BSS_CHANGED_BSSID |
1882 BSS_CHANGED_IBSS |
1883 BSS_CHANGED_BASIC_RATES |
1884 BSS_CHANGED_HT)) {
1885 pr_debug("BSS_CHANGED_ASSOC\n");
1886 if (vif->cfg.assoc) {
1887 if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
1888 ieee80211_connection_loss(vif);
1889 mutex_unlock(&priv->conf_mutex);
1890 return;
1891 } else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
1892 priv->join_status = CW1200_JOIN_STATUS_STA;
1893 }
1894 } else {
1895 do_join = true;
1896 }
1897
1898 if (vif->cfg.assoc || vif->cfg.ibss_joined) {
1899 struct ieee80211_sta *sta = NULL;
1900 __le32 htprot = 0;
1901
1902 if (info->dtim_period)
1903 priv->join_dtim_period = info->dtim_period;
1904 priv->beacon_int = info->beacon_int;
1905
1906 rcu_read_lock();
1907
1908 if (info->bssid && !vif->cfg.ibss_joined)
1909 sta = ieee80211_find_sta(vif, info->bssid);
1910 if (sta) {
1911 priv->ht_info.ht_cap = sta->deflink.ht_cap;
1912 priv->bss_params.operational_rate_set =
1913 cw1200_rate_mask_to_wsm(priv,
1914 sta->deflink.supp_rates[priv->channel->band]);
1915 priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
1916 priv->ht_info.operation_mode = info->ht_operation_mode;
1917 } else {
1918 memset(&priv->ht_info, 0,
1919 sizeof(priv->ht_info));
1920 priv->bss_params.operational_rate_set = -1;
1921 }
1922 rcu_read_unlock();
1923
1924 /* Non Greenfield stations present */
1925 if (priv->ht_info.operation_mode &
1926 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
1927 htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
1928
1929 /* Set HT protection method */
1930 htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
1931
1932 /* TODO:
1933 * STBC_param.dual_cts
1934 * STBC_param.LSIG_TXOP_FILL
1935 */
1936
1937 wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
1938 &htprot, sizeof(htprot));
1939
1940 priv->association_mode.greenfield =
1941 cw1200_ht_greenfield(&priv->ht_info);
1942 priv->association_mode.flags =
1943 WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
1944 WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
1945 WSM_ASSOCIATION_MODE_USE_HT_MODE |
1946 WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
1947 WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
1948 priv->association_mode.preamble =
1949 info->use_short_preamble ?
1950 WSM_JOIN_PREAMBLE_SHORT :
1951 WSM_JOIN_PREAMBLE_LONG;
1952 priv->association_mode.basic_rate_set = __cpu_to_le32(
1953 cw1200_rate_mask_to_wsm(priv,
1954 info->basic_rates));
1955 priv->association_mode.mpdu_start_spacing =
1956 cw1200_ht_ampdu_density(&priv->ht_info);
1957
1958 cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
1959 cancel_work_sync(&priv->unjoin_work);
1960
1961 priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
1962 priv->bss_params.aid = vif->cfg.aid;
1963
1964 if (priv->join_dtim_period < 1)
1965 priv->join_dtim_period = 1;
1966
1967 pr_debug("[STA] DTIM %d, interval: %d\n",
1968 priv->join_dtim_period, priv->beacon_int);
1969 pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
1970 priv->association_mode.preamble,
1971 priv->association_mode.greenfield,
1972 priv->bss_params.aid,
1973 priv->bss_params.operational_rate_set,
1974 priv->association_mode.basic_rate_set);
1975 wsm_set_association_mode(priv, &priv->association_mode);
1976
1977 if (!vif->cfg.ibss_joined) {
1978 wsm_keep_alive_period(priv, 30 /* sec */);
1979 wsm_set_bss_params(priv, &priv->bss_params);
1980 priv->setbssparams_done = true;
1981 cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
1982 cw1200_set_pm(priv, &priv->powersave_mode);
1983 }
1984 if (priv->vif->p2p) {
1985 pr_debug("[STA] Setting p2p powersave configuration.\n");
1986 wsm_set_p2p_ps_modeinfo(priv,
1987 &priv->p2p_ps_modeinfo);
1988 }
1989 if (priv->bt_present)
1990 cw1200_set_btcoexinfo(priv);
1991 } else {
1992 memset(&priv->association_mode, 0,
1993 sizeof(priv->association_mode));
1994 memset(&priv->bss_params, 0, sizeof(priv->bss_params));
1995 }
1996 }
1997
1998 /* ERP Protection */
1999 if (changed & (BSS_CHANGED_ASSOC |
2000 BSS_CHANGED_ERP_CTS_PROT |
2001 BSS_CHANGED_ERP_PREAMBLE)) {
2002 u32 prev_erp_info = priv->erp_info;
2003 if (info->use_cts_prot)
2004 priv->erp_info |= WLAN_ERP_USE_PROTECTION;
2005 else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
2006 priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
2007
2008 if (info->use_short_preamble)
2009 priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
2010 else
2011 priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
2012
2013 pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
2014
2015 if (prev_erp_info != priv->erp_info)
2016 queue_work(priv->workqueue, &priv->set_cts_work);
2017 }
2018
2019 /* ERP Slottime */
2020 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
2021 __le32 slot_time = info->use_short_slot ?
2022 __cpu_to_le32(9) : __cpu_to_le32(20);
2023 pr_debug("[STA] Slot time: %d us.\n",
2024 __le32_to_cpu(slot_time));
2025 wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
2026 &slot_time, sizeof(slot_time));
2027 }
2028
2029 if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
2030 struct wsm_rcpi_rssi_threshold threshold = {
2031 .rollingAverageCount = 8,
2032 };
2033 pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
2034 info->cqm_rssi_thold, info->cqm_rssi_hyst);
2035 priv->cqm_rssi_thold = info->cqm_rssi_thold;
2036 priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
2037
2038 if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
2039 /* RSSI subscription enabled */
2040 /* TODO: It's not a correct way of setting threshold.
2041 * Upper and lower must be set equal here and adjusted
2042 * in callback. However current implementation is much
2043 * more relaible and stable.
2044 */
2045
2046 /* RSSI: signed Q8.0, RCPI: unsigned Q7.1
2047 * RSSI = RCPI / 2 - 110
2048 */
2049 if (priv->cqm_use_rssi) {
2050 threshold.upperThreshold =
2051 info->cqm_rssi_thold + info->cqm_rssi_hyst;
2052 threshold.lowerThreshold =
2053 info->cqm_rssi_thold;
2054 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2055 } else {
2056 threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
2057 threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
2058 }
2059 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
2060 } else {
2061 /* There is a bug in FW, see sta.c. We have to enable
2062 * dummy subscription to get correct RSSI values.
2063 */
2064 threshold.rssiRcpiMode |=
2065 WSM_RCPI_RSSI_THRESHOLD_ENABLE |
2066 WSM_RCPI_RSSI_DONT_USE_UPPER |
2067 WSM_RCPI_RSSI_DONT_USE_LOWER;
2068 if (priv->cqm_use_rssi)
2069 threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
2070 }
2071 wsm_set_rcpi_rssi_threshold(priv, &threshold);
2072 }
2073 mutex_unlock(&priv->conf_mutex);
2074
2075 if (do_join) {
2076 wsm_lock_tx(priv);
2077 cw1200_do_join(priv); /* Will unlock it for us */
2078 }
2079}
2080
2081void cw1200_multicast_start_work(struct work_struct *work)
2082{
2083 struct cw1200_common *priv =
2084 container_of(work, struct cw1200_common, multicast_start_work);
2085 long tmo = priv->join_dtim_period *
2086 (priv->beacon_int + 20) * HZ / 1024;
2087
2088 cancel_work_sync(&priv->multicast_stop_work);
2089
2090 if (!priv->aid0_bit_set) {
2091 wsm_lock_tx(priv);
2092 cw1200_set_tim_impl(priv, true);
2093 priv->aid0_bit_set = true;
2094 mod_timer(&priv->mcast_timeout, jiffies + tmo);
2095 wsm_unlock_tx(priv);
2096 }
2097}
2098
2099void cw1200_multicast_stop_work(struct work_struct *work)
2100{
2101 struct cw1200_common *priv =
2102 container_of(work, struct cw1200_common, multicast_stop_work);
2103
2104 if (priv->aid0_bit_set) {
2105 del_timer_sync(&priv->mcast_timeout);
2106 wsm_lock_tx(priv);
2107 priv->aid0_bit_set = false;
2108 cw1200_set_tim_impl(priv, false);
2109 wsm_unlock_tx(priv);
2110 }
2111}
2112
2113void cw1200_mcast_timeout(struct timer_list *t)
2114{
2115 struct cw1200_common *priv = from_timer(priv, t, mcast_timeout);
2116
2117 wiphy_warn(priv->hw->wiphy,
2118 "Multicast delivery timeout.\n");
2119 spin_lock_bh(&priv->ps_state_lock);
2120 priv->tx_multicast = priv->aid0_bit_set &&
2121 priv->buffered_multicasts;
2122 if (priv->tx_multicast)
2123 cw1200_bh_wakeup(priv);
2124 spin_unlock_bh(&priv->ps_state_lock);
2125}
2126
2127int cw1200_ampdu_action(struct ieee80211_hw *hw,
2128 struct ieee80211_vif *vif,
2129 struct ieee80211_ampdu_params *params)
2130{
2131 /* Aggregation is implemented fully in firmware,
2132 * including block ack negotiation. Do not allow
2133 * mac80211 stack to do anything: it interferes with
2134 * the firmware.
2135 */
2136
2137 /* Note that we still need this function stubbed. */
2138 return -ENOTSUPP;
2139}
2140
2141/* ******************************************************************** */
2142/* WSM callback */
2143void cw1200_suspend_resume(struct cw1200_common *priv,
2144 struct wsm_suspend_resume *arg)
2145{
2146 pr_debug("[AP] %s: %s\n",
2147 arg->stop ? "stop" : "start",
2148 arg->multicast ? "broadcast" : "unicast");
2149
2150 if (arg->multicast) {
2151 bool cancel_tmo = false;
2152 spin_lock_bh(&priv->ps_state_lock);
2153 if (arg->stop) {
2154 priv->tx_multicast = false;
2155 } else {
2156 /* Firmware sends this indication every DTIM if there
2157 * is a STA in powersave connected. There is no reason
2158 * to suspend, following wakeup will consume much more
2159 * power than it could be saved.
2160 */
2161 cw1200_pm_stay_awake(&priv->pm_state,
2162 priv->join_dtim_period *
2163 (priv->beacon_int + 20) * HZ / 1024);
2164 priv->tx_multicast = (priv->aid0_bit_set &&
2165 priv->buffered_multicasts);
2166 if (priv->tx_multicast) {
2167 cancel_tmo = true;
2168 cw1200_bh_wakeup(priv);
2169 }
2170 }
2171 spin_unlock_bh(&priv->ps_state_lock);
2172 if (cancel_tmo)
2173 del_timer_sync(&priv->mcast_timeout);
2174 } else {
2175 spin_lock_bh(&priv->ps_state_lock);
2176 cw1200_ps_notify(priv, arg->link_id, arg->stop);
2177 spin_unlock_bh(&priv->ps_state_lock);
2178 if (!arg->stop)
2179 cw1200_bh_wakeup(priv);
2180 }
2181 return;
2182}
2183
2184/* ******************************************************************** */
2185/* AP privates */
2186
2187static int cw1200_upload_beacon(struct cw1200_common *priv)
2188{
2189 int ret = 0;
2190 struct ieee80211_mgmt *mgmt;
2191 struct wsm_template_frame frame = {
2192 .frame_type = WSM_FRAME_TYPE_BEACON,
2193 };
2194
2195 u16 tim_offset;
2196 u16 tim_len;
2197
2198 if (priv->mode == NL80211_IFTYPE_STATION ||
2199 priv->mode == NL80211_IFTYPE_MONITOR ||
2200 priv->mode == NL80211_IFTYPE_UNSPECIFIED)
2201 goto done;
2202
2203 if (priv->vif->p2p)
2204 frame.rate = WSM_TRANSMIT_RATE_6;
2205
2206 frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
2207 &tim_offset, &tim_len, 0);
2208 if (!frame.skb)
2209 return -ENOMEM;
2210
2211 ret = wsm_set_template_frame(priv, &frame);
2212
2213 if (ret)
2214 goto done;
2215
2216 /* TODO: Distill probe resp; remove TIM
2217 * and any other beacon-specific IEs
2218 */
2219 mgmt = (void *)frame.skb->data;
2220 mgmt->frame_control =
2221 __cpu_to_le16(IEEE80211_FTYPE_MGMT |
2222 IEEE80211_STYPE_PROBE_RESP);
2223
2224 frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
2225 if (priv->vif->p2p) {
2226 ret = wsm_set_probe_responder(priv, true);
2227 } else {
2228 ret = wsm_set_template_frame(priv, &frame);
2229 wsm_set_probe_responder(priv, false);
2230 }
2231
2232done:
2233 dev_kfree_skb(frame.skb);
2234
2235 return ret;
2236}
2237
2238static int cw1200_upload_pspoll(struct cw1200_common *priv)
2239{
2240 int ret = 0;
2241 struct wsm_template_frame frame = {
2242 .frame_type = WSM_FRAME_TYPE_PS_POLL,
2243 .rate = 0xFF,
2244 };
2245
2246
2247 frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
2248 if (!frame.skb)
2249 return -ENOMEM;
2250
2251 ret = wsm_set_template_frame(priv, &frame);
2252
2253 dev_kfree_skb(frame.skb);
2254
2255 return ret;
2256}
2257
2258static int cw1200_upload_null(struct cw1200_common *priv)
2259{
2260 int ret = 0;
2261 struct wsm_template_frame frame = {
2262 .frame_type = WSM_FRAME_TYPE_NULL,
2263 .rate = 0xFF,
2264 };
2265
2266 frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif,-1, false);
2267 if (!frame.skb)
2268 return -ENOMEM;
2269
2270 ret = wsm_set_template_frame(priv, &frame);
2271
2272 dev_kfree_skb(frame.skb);
2273
2274 return ret;
2275}
2276
2277static int cw1200_upload_qosnull(struct cw1200_common *priv)
2278{
2279 /* TODO: This needs to be implemented
2280
2281 struct wsm_template_frame frame = {
2282 .frame_type = WSM_FRAME_TYPE_QOS_NULL,
2283 .rate = 0xFF,
2284 };
2285
2286 frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
2287 if (!frame.skb)
2288 return -ENOMEM;
2289
2290 ret = wsm_set_template_frame(priv, &frame);
2291
2292 dev_kfree_skb(frame.skb);
2293
2294 */
2295 return 0;
2296}
2297
2298static int cw1200_enable_beaconing(struct cw1200_common *priv,
2299 bool enable)
2300{
2301 struct wsm_beacon_transmit transmit = {
2302 .enable_beaconing = enable,
2303 };
2304
2305 return wsm_beacon_transmit(priv, &transmit);
2306}
2307
2308static int cw1200_start_ap(struct cw1200_common *priv)
2309{
2310 int ret;
2311 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2312 struct wsm_start start = {
2313 .mode = priv->vif->p2p ?
2314 WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
2315 .band = (priv->channel->band == NL80211_BAND_5GHZ) ?
2316 WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
2317 .channel_number = priv->channel->hw_value,
2318 .beacon_interval = conf->beacon_int,
2319 .dtim_period = conf->dtim_period,
2320 .preamble = conf->use_short_preamble ?
2321 WSM_JOIN_PREAMBLE_SHORT :
2322 WSM_JOIN_PREAMBLE_LONG,
2323 .probe_delay = 100,
2324 .basic_rate_set = cw1200_rate_mask_to_wsm(priv,
2325 conf->basic_rates),
2326 };
2327 struct wsm_operational_mode mode = {
2328 .power_mode = cw1200_power_mode,
2329 .disable_more_flag_usage = true,
2330 };
2331
2332 memset(start.ssid, 0, sizeof(start.ssid));
2333 if (!conf->hidden_ssid) {
2334 start.ssid_len = priv->vif->cfg.ssid_len;
2335 memcpy(start.ssid, priv->vif->cfg.ssid, start.ssid_len);
2336 }
2337
2338 priv->beacon_int = conf->beacon_int;
2339 priv->join_dtim_period = conf->dtim_period;
2340
2341 memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
2342
2343 pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
2344 start.channel_number, start.band,
2345 start.beacon_interval, start.dtim_period,
2346 start.basic_rate_set,
2347 start.ssid_len, start.ssid);
2348 ret = wsm_start(priv, &start);
2349 if (!ret)
2350 ret = cw1200_upload_keys(priv);
2351 if (!ret && priv->vif->p2p) {
2352 pr_debug("[AP] Setting p2p powersave configuration.\n");
2353 wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
2354 }
2355 if (!ret) {
2356 wsm_set_block_ack_policy(priv, 0, 0);
2357 priv->join_status = CW1200_JOIN_STATUS_AP;
2358 cw1200_update_filtering(priv);
2359 }
2360 wsm_set_operational_mode(priv, &mode);
2361 return ret;
2362}
2363
2364static int cw1200_update_beaconing(struct cw1200_common *priv)
2365{
2366 struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
2367 struct wsm_reset reset = {
2368 .link_id = 0,
2369 .reset_statistics = true,
2370 };
2371
2372 if (priv->mode == NL80211_IFTYPE_AP) {
2373 /* TODO: check if changed channel, band */
2374 if (priv->join_status != CW1200_JOIN_STATUS_AP ||
2375 priv->beacon_int != conf->beacon_int) {
2376 pr_debug("ap restarting\n");
2377 wsm_lock_tx(priv);
2378 if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
2379 wsm_reset(priv, &reset);
2380 priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
2381 cw1200_start_ap(priv);
2382 wsm_unlock_tx(priv);
2383 } else
2384 pr_debug("ap started join_status: %d\n",
2385 priv->join_status);
2386 }
2387 return 0;
2388}