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Linux 5.7.7
[linux/fpc-iii.git] / net / mac80211 / main.c
blob6423173bb87ed4bb0df0b17c59e09644cf2e0e56
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2017 Intel Deutschland GmbH
8 * Copyright (C) 2018 - 2019 Intel Corporation
9 */
10
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/fips.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wep.h"
33 #include "led.h"
34 #include "debugfs.h"
35
36 void ieee80211_configure_filter(struct ieee80211_local *local)
37 {
38 u64 mc;
39 unsigned int changed_flags;
40 unsigned int new_flags = 0;
41
42 if (atomic_read(&local->iff_allmultis))
43 new_flags |= FIF_ALLMULTI;
44
45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47 new_flags |= FIF_BCN_PRBRESP_PROMISC;
48
49 if (local->fif_probe_req || local->probe_req_reg)
50 new_flags |= FIF_PROBE_REQ;
51
52 if (local->fif_fcsfail)
53 new_flags |= FIF_FCSFAIL;
54
55 if (local->fif_plcpfail)
56 new_flags |= FIF_PLCPFAIL;
57
58 if (local->fif_control)
59 new_flags |= FIF_CONTROL;
60
61 if (local->fif_other_bss)
62 new_flags |= FIF_OTHER_BSS;
63
64 if (local->fif_pspoll)
65 new_flags |= FIF_PSPOLL;
66
67 spin_lock_bh(&local->filter_lock);
68 changed_flags = local->filter_flags ^ new_flags;
69
70 mc = drv_prepare_multicast(local, &local->mc_list);
71 spin_unlock_bh(&local->filter_lock);
72
73 /* be a bit nasty */
74 new_flags |= (1<<31);
75
76 drv_configure_filter(local, changed_flags, &new_flags, mc);
77
78 WARN_ON(new_flags & (1<<31));
79
80 local->filter_flags = new_flags & ~(1<<31);
81 }
82
83 static void ieee80211_reconfig_filter(struct work_struct *work)
84 {
85 struct ieee80211_local *local =
86 container_of(work, struct ieee80211_local, reconfig_filter);
87
88 ieee80211_configure_filter(local);
89 }
90
91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
92 {
93 struct ieee80211_sub_if_data *sdata;
94 struct cfg80211_chan_def chandef = {};
95 u32 changed = 0;
96 int power;
97 u32 offchannel_flag;
98
99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
100
101 if (local->scan_chandef.chan) {
102 chandef = local->scan_chandef;
103 } else if (local->tmp_channel) {
104 chandef.chan = local->tmp_channel;
105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
106 chandef.center_freq1 = chandef.chan->center_freq;
107 } else
108 chandef = local->_oper_chandef;
109
110 WARN(!cfg80211_chandef_valid(&chandef),
111 "control:%d MHz width:%d center: %d/%d MHz",
112 chandef.chan->center_freq, chandef.width,
113 chandef.center_freq1, chandef.center_freq2);
114
115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
117 else
118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
119
120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
121
122 if (offchannel_flag ||
123 !cfg80211_chandef_identical(&local->hw.conf.chandef,
124 &local->_oper_chandef)) {
125 local->hw.conf.chandef = chandef;
126 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
127 }
128
129 if (!conf_is_ht(&local->hw.conf)) {
130 /*
131 * mac80211.h documents that this is only valid
132 * when the channel is set to an HT type, and
133 * that otherwise STATIC is used.
134 */
135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
136 } else if (local->hw.conf.smps_mode != local->smps_mode) {
137 local->hw.conf.smps_mode = local->smps_mode;
138 changed |= IEEE80211_CONF_CHANGE_SMPS;
139 }
140
141 power = ieee80211_chandef_max_power(&chandef);
142
143 rcu_read_lock();
144 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
145 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
146 continue;
147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
148 continue;
149 if (sdata->vif.bss_conf.txpower == INT_MIN)
150 continue;
151 power = min(power, sdata->vif.bss_conf.txpower);
152 }
153 rcu_read_unlock();
154
155 if (local->hw.conf.power_level != power) {
156 changed |= IEEE80211_CONF_CHANGE_POWER;
157 local->hw.conf.power_level = power;
158 }
159
160 return changed;
161 }
162
163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
164 {
165 int ret = 0;
166
167 might_sleep();
168
169 if (!local->use_chanctx)
170 changed |= ieee80211_hw_conf_chan(local);
171 else
172 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
173 IEEE80211_CONF_CHANGE_POWER);
174
175 if (changed && local->open_count) {
176 ret = drv_config(local, changed);
177 /*
178 * Goal:
179 * HW reconfiguration should never fail, the driver has told
180 * us what it can support so it should live up to that promise.
181 *
182 * Current status:
183 * rfkill is not integrated with mac80211 and a
184 * configuration command can thus fail if hardware rfkill
185 * is enabled
186 *
187 * FIXME: integrate rfkill with mac80211 and then add this
188 * WARN_ON() back
189 *
190 */
191 /* WARN_ON(ret); */
192 }
193
194 return ret;
195 }
196
197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
198 u32 changed)
199 {
200 struct ieee80211_local *local = sdata->local;
201
202 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
203 return;
204
205 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
206 }
207
208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
209 {
210 sdata->vif.bss_conf.use_cts_prot = false;
211 sdata->vif.bss_conf.use_short_preamble = false;
212 sdata->vif.bss_conf.use_short_slot = false;
213 return BSS_CHANGED_ERP_CTS_PROT |
214 BSS_CHANGED_ERP_PREAMBLE |
215 BSS_CHANGED_ERP_SLOT;
216 }
217
218 static void ieee80211_tasklet_handler(unsigned long data)
219 {
220 struct ieee80211_local *local = (struct ieee80211_local *) data;
221 struct sk_buff *skb;
222
223 while ((skb = skb_dequeue(&local->skb_queue)) ||
224 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
225 switch (skb->pkt_type) {
226 case IEEE80211_RX_MSG:
227 /* Clear skb->pkt_type in order to not confuse kernel
228 * netstack. */
229 skb->pkt_type = 0;
230 ieee80211_rx(&local->hw, skb);
231 break;
232 case IEEE80211_TX_STATUS_MSG:
233 skb->pkt_type = 0;
234 ieee80211_tx_status(&local->hw, skb);
235 break;
236 default:
237 WARN(1, "mac80211: Packet is of unknown type %d\n",
238 skb->pkt_type);
239 dev_kfree_skb(skb);
240 break;
241 }
242 }
243 }
244
245 static void ieee80211_restart_work(struct work_struct *work)
246 {
247 struct ieee80211_local *local =
248 container_of(work, struct ieee80211_local, restart_work);
249 struct ieee80211_sub_if_data *sdata;
250
251 /* wait for scan work complete */
252 flush_workqueue(local->workqueue);
253 flush_work(&local->sched_scan_stopped_work);
254
255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
256 "%s called with hardware scan in progress\n", __func__);
257
258 flush_work(&local->radar_detected_work);
259 rtnl_lock();
260 list_for_each_entry(sdata, &local->interfaces, list) {
261 /*
262 * XXX: there may be more work for other vif types and even
263 * for station mode: a good thing would be to run most of
264 * the iface type's dependent _stop (ieee80211_mg_stop,
265 * ieee80211_ibss_stop) etc...
266 * For now, fix only the specific bug that was seen: race
267 * between csa_connection_drop_work and us.
268 */
269 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
270 /*
271 * This worker is scheduled from the iface worker that
272 * runs on mac80211's workqueue, so we can't be
273 * scheduling this worker after the cancel right here.
274 * The exception is ieee80211_chswitch_done.
275 * Then we can have a race...
276 */
277 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
278 }
279 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
280 }
281 ieee80211_scan_cancel(local);
282
283 /* make sure any new ROC will consider local->in_reconfig */
284 flush_delayed_work(&local->roc_work);
285 flush_work(&local->hw_roc_done);
286
287 /* wait for all packet processing to be done */
288 synchronize_net();
289
290 ieee80211_reconfig(local);
291 rtnl_unlock();
292 }
293
294 void ieee80211_restart_hw(struct ieee80211_hw *hw)
295 {
296 struct ieee80211_local *local = hw_to_local(hw);
297
298 trace_api_restart_hw(local);
299
300 wiphy_info(hw->wiphy,
301 "Hardware restart was requested\n");
302
303 /* use this reason, ieee80211_reconfig will unblock it */
304 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
305 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
306 false);
307
308 /*
309 * Stop all Rx during the reconfig. We don't want state changes
310 * or driver callbacks while this is in progress.
311 */
312 local->in_reconfig = true;
313 barrier();
314
315 queue_work(system_freezable_wq, &local->restart_work);
316 }
317 EXPORT_SYMBOL(ieee80211_restart_hw);
318
319 #ifdef CONFIG_INET
320 static int ieee80211_ifa_changed(struct notifier_block *nb,
321 unsigned long data, void *arg)
322 {
323 struct in_ifaddr *ifa = arg;
324 struct ieee80211_local *local =
325 container_of(nb, struct ieee80211_local,
326 ifa_notifier);
327 struct net_device *ndev = ifa->ifa_dev->dev;
328 struct wireless_dev *wdev = ndev->ieee80211_ptr;
329 struct in_device *idev;
330 struct ieee80211_sub_if_data *sdata;
331 struct ieee80211_bss_conf *bss_conf;
332 struct ieee80211_if_managed *ifmgd;
333 int c = 0;
334
335 /* Make sure it's our interface that got changed */
336 if (!wdev)
337 return NOTIFY_DONE;
338
339 if (wdev->wiphy != local->hw.wiphy)
340 return NOTIFY_DONE;
341
342 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
343 bss_conf = &sdata->vif.bss_conf;
344
345 /* ARP filtering is only supported in managed mode */
346 if (sdata->vif.type != NL80211_IFTYPE_STATION)
347 return NOTIFY_DONE;
348
349 idev = __in_dev_get_rtnl(sdata->dev);
350 if (!idev)
351 return NOTIFY_DONE;
352
353 ifmgd = &sdata->u.mgd;
354 sdata_lock(sdata);
355
356 /* Copy the addresses to the bss_conf list */
357 ifa = rtnl_dereference(idev->ifa_list);
358 while (ifa) {
359 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
360 bss_conf->arp_addr_list[c] = ifa->ifa_address;
361 ifa = rtnl_dereference(ifa->ifa_next);
362 c++;
363 }
364
365 bss_conf->arp_addr_cnt = c;
366
367 /* Configure driver only if associated (which also implies it is up) */
368 if (ifmgd->associated)
369 ieee80211_bss_info_change_notify(sdata,
370 BSS_CHANGED_ARP_FILTER);
371
372 sdata_unlock(sdata);
373
374 return NOTIFY_OK;
375 }
376 #endif
377
378 #if IS_ENABLED(CONFIG_IPV6)
379 static int ieee80211_ifa6_changed(struct notifier_block *nb,
380 unsigned long data, void *arg)
381 {
382 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
383 struct inet6_dev *idev = ifa->idev;
384 struct net_device *ndev = ifa->idev->dev;
385 struct ieee80211_local *local =
386 container_of(nb, struct ieee80211_local, ifa6_notifier);
387 struct wireless_dev *wdev = ndev->ieee80211_ptr;
388 struct ieee80211_sub_if_data *sdata;
389
390 /* Make sure it's our interface that got changed */
391 if (!wdev || wdev->wiphy != local->hw.wiphy)
392 return NOTIFY_DONE;
393
394 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
395
396 /*
397 * For now only support station mode. This is mostly because
398 * doing AP would have to handle AP_VLAN in some way ...
399 */
400 if (sdata->vif.type != NL80211_IFTYPE_STATION)
401 return NOTIFY_DONE;
402
403 drv_ipv6_addr_change(local, sdata, idev);
404
405 return NOTIFY_OK;
406 }
407 #endif
408
409 /* There isn't a lot of sense in it, but you can transmit anything you like */
410 static const struct ieee80211_txrx_stypes
411 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
412 [NL80211_IFTYPE_ADHOC] = {
413 .tx = 0xffff,
414 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
415 BIT(IEEE80211_STYPE_AUTH >> 4) |
416 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
418 },
419 [NL80211_IFTYPE_STATION] = {
420 .tx = 0xffff,
421 /*
422 * To support Pre Association Security Negotiation (PASN) while
423 * already associated to one AP, allow user space to register to
424 * Rx authentication frames, so that the user space logic would
425 * be able to receive/handle authentication frames from a
426 * different AP as part of PASN.
427 * It is expected that user space would intelligently register
428 * for Rx authentication frames, i.e., only when PASN is used
429 * and configure a match filter only for PASN authentication
430 * algorithm, as otherwise the MLME functionality of mac80211
431 * would be broken.
432 */
433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
434 BIT(IEEE80211_STYPE_AUTH >> 4) |
435 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
436 },
437 [NL80211_IFTYPE_AP] = {
438 .tx = 0xffff,
439 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
440 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
441 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
442 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
443 BIT(IEEE80211_STYPE_AUTH >> 4) |
444 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
445 BIT(IEEE80211_STYPE_ACTION >> 4),
446 },
447 [NL80211_IFTYPE_AP_VLAN] = {
448 /* copy AP */
449 .tx = 0xffff,
450 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
451 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
452 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
453 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
454 BIT(IEEE80211_STYPE_AUTH >> 4) |
455 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
456 BIT(IEEE80211_STYPE_ACTION >> 4),
457 },
458 [NL80211_IFTYPE_P2P_CLIENT] = {
459 .tx = 0xffff,
460 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
461 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
462 },
463 [NL80211_IFTYPE_P2P_GO] = {
464 .tx = 0xffff,
465 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
466 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
467 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
468 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
469 BIT(IEEE80211_STYPE_AUTH >> 4) |
470 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
471 BIT(IEEE80211_STYPE_ACTION >> 4),
472 },
473 [NL80211_IFTYPE_MESH_POINT] = {
474 .tx = 0xffff,
475 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
476 BIT(IEEE80211_STYPE_AUTH >> 4) |
477 BIT(IEEE80211_STYPE_DEAUTH >> 4),
478 },
479 [NL80211_IFTYPE_P2P_DEVICE] = {
480 .tx = 0xffff,
481 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
482 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
483 },
484 };
485
486 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
487 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
488 IEEE80211_HT_AMPDU_PARM_DENSITY,
489
490 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
491 IEEE80211_HT_CAP_MAX_AMSDU |
492 IEEE80211_HT_CAP_SGI_20 |
493 IEEE80211_HT_CAP_SGI_40 |
494 IEEE80211_HT_CAP_TX_STBC |
495 IEEE80211_HT_CAP_RX_STBC |
496 IEEE80211_HT_CAP_LDPC_CODING |
497 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
498 .mcs = {
499 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
500 0xff, 0xff, 0xff, 0xff, 0xff, },
501 },
502 };
503
504 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
505 .vht_cap_info =
506 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
507 IEEE80211_VHT_CAP_SHORT_GI_80 |
508 IEEE80211_VHT_CAP_SHORT_GI_160 |
509 IEEE80211_VHT_CAP_RXSTBC_MASK |
510 IEEE80211_VHT_CAP_TXSTBC |
511 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
512 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
513 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
514 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
515 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
516 .supp_mcs = {
517 .rx_mcs_map = cpu_to_le16(~0),
518 .tx_mcs_map = cpu_to_le16(~0),
519 },
520 };
521
522 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
523 const struct ieee80211_ops *ops,
524 const char *requested_name)
525 {
526 struct ieee80211_local *local;
527 int priv_size, i;
528 struct wiphy *wiphy;
529 bool use_chanctx;
530
531 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
532 !ops->add_interface || !ops->remove_interface ||
533 !ops->configure_filter))
534 return NULL;
535
536 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
537 return NULL;
538
539 /* check all or no channel context operations exist */
540 i = !!ops->add_chanctx + !!ops->remove_chanctx +
541 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
542 !!ops->unassign_vif_chanctx;
543 if (WARN_ON(i != 0 && i != 5))
544 return NULL;
545 use_chanctx = i == 5;
546
547 /* Ensure 32-byte alignment of our private data and hw private data.
548 * We use the wiphy priv data for both our ieee80211_local and for
549 * the driver's private data
550 *
551 * In memory it'll be like this:
552 *
553 * +-------------------------+
554 * | struct wiphy |
555 * +-------------------------+
556 * | struct ieee80211_local |
557 * +-------------------------+
558 * | driver's private data |
559 * +-------------------------+
560 *
561 */
562 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
563
564 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
565
566 if (!wiphy)
567 return NULL;
568
569 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
570
571 wiphy->privid = mac80211_wiphy_privid;
572
573 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
574 WIPHY_FLAG_4ADDR_AP |
575 WIPHY_FLAG_4ADDR_STATION |
576 WIPHY_FLAG_REPORTS_OBSS |
577 WIPHY_FLAG_OFFCHAN_TX;
578
579 if (!use_chanctx || ops->remain_on_channel)
580 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
581
582 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
583 NL80211_FEATURE_SAE |
584 NL80211_FEATURE_HT_IBSS |
585 NL80211_FEATURE_VIF_TXPOWER |
586 NL80211_FEATURE_MAC_ON_CREATE |
587 NL80211_FEATURE_USERSPACE_MPM |
588 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
589 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
590 wiphy_ext_feature_set(wiphy,
591 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
592 wiphy_ext_feature_set(wiphy,
593 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
594
595 if (!ops->hw_scan) {
596 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
597 NL80211_FEATURE_AP_SCAN;
598 /*
599 * if the driver behaves correctly using the probe request
600 * (template) from mac80211, then both of these should be
601 * supported even with hw scan - but let drivers opt in.
602 */
603 wiphy_ext_feature_set(wiphy,
604 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
605 wiphy_ext_feature_set(wiphy,
606 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
607 }
608
609 if (!ops->set_key)
610 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
611
612 if (ops->wake_tx_queue)
613 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
614
615 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
616
617 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
618
619 local = wiphy_priv(wiphy);
620
621 if (sta_info_init(local))
622 goto err_free;
623
624 local->hw.wiphy = wiphy;
625
626 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
627
628 local->ops = ops;
629 local->use_chanctx = use_chanctx;
630
631 /*
632 * We need a bit of data queued to build aggregates properly, so
633 * instruct the TCP stack to allow more than a single ms of data
634 * to be queued in the stack. The value is a bit-shift of 1
635 * second, so 7 is ~8ms of queued data. Only affects local TCP
636 * sockets.
637 * This is the default, anyhow - drivers may need to override it
638 * for local reasons (longer buffers, longer completion time, or
639 * similar).
640 */
641 local->hw.tx_sk_pacing_shift = 7;
642
643 /* set up some defaults */
644 local->hw.queues = 1;
645 local->hw.max_rates = 1;
646 local->hw.max_report_rates = 0;
647 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
648 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
649 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
650 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
651 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
652 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
653 IEEE80211_RADIOTAP_MCS_HAVE_GI |
654 IEEE80211_RADIOTAP_MCS_HAVE_BW;
655 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
656 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
657 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
658 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
659 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
660 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
661 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
662 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
663
664 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
665
666 wiphy->extended_capabilities = local->ext_capa;
667 wiphy->extended_capabilities_mask = local->ext_capa;
668 wiphy->extended_capabilities_len =
669 ARRAY_SIZE(local->ext_capa);
670
671 INIT_LIST_HEAD(&local->interfaces);
672 INIT_LIST_HEAD(&local->mon_list);
673
674 __hw_addr_init(&local->mc_list);
675
676 mutex_init(&local->iflist_mtx);
677 mutex_init(&local->mtx);
678
679 mutex_init(&local->key_mtx);
680 spin_lock_init(&local->filter_lock);
681 spin_lock_init(&local->rx_path_lock);
682 spin_lock_init(&local->queue_stop_reason_lock);
683
684 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
685 INIT_LIST_HEAD(&local->active_txqs[i]);
686 spin_lock_init(&local->active_txq_lock[i]);
687 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
688 local->aql_txq_limit_high[i] =
689 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
690 }
691
692 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
693 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
694 atomic_set(&local->aql_total_pending_airtime, 0);
695
696 INIT_LIST_HEAD(&local->chanctx_list);
697 mutex_init(&local->chanctx_mtx);
698
699 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
700
701 INIT_WORK(&local->restart_work, ieee80211_restart_work);
702
703 INIT_WORK(&local->radar_detected_work,
704 ieee80211_dfs_radar_detected_work);
705
706 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
707 local->smps_mode = IEEE80211_SMPS_OFF;
708
709 INIT_WORK(&local->dynamic_ps_enable_work,
710 ieee80211_dynamic_ps_enable_work);
711 INIT_WORK(&local->dynamic_ps_disable_work,
712 ieee80211_dynamic_ps_disable_work);
713 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
714
715 INIT_WORK(&local->sched_scan_stopped_work,
716 ieee80211_sched_scan_stopped_work);
717
718 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
719
720 spin_lock_init(&local->ack_status_lock);
721 idr_init(&local->ack_status_frames);
722
723 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
724 skb_queue_head_init(&local->pending[i]);
725 atomic_set(&local->agg_queue_stop[i], 0);
726 }
727 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
728 (unsigned long)local);
729
730 if (ops->wake_tx_queue)
731 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
732 (unsigned long)local);
733
734 tasklet_init(&local->tasklet,
735 ieee80211_tasklet_handler,
736 (unsigned long) local);
737
738 skb_queue_head_init(&local->skb_queue);
739 skb_queue_head_init(&local->skb_queue_unreliable);
740 skb_queue_head_init(&local->skb_queue_tdls_chsw);
741
742 ieee80211_alloc_led_names(local);
743
744 ieee80211_roc_setup(local);
745
746 local->hw.radiotap_timestamp.units_pos = -1;
747 local->hw.radiotap_timestamp.accuracy = -1;
748
749 return &local->hw;
750 err_free:
751 wiphy_free(wiphy);
752 return NULL;
753 }
754 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
755
756 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
757 {
758 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
759 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
760 int n_suites = 0, r = 0, w = 0;
761 u32 *suites;
762 static const u32 cipher_suites[] = {
763 /* keep WEP first, it may be removed below */
764 WLAN_CIPHER_SUITE_WEP40,
765 WLAN_CIPHER_SUITE_WEP104,
766 WLAN_CIPHER_SUITE_TKIP,
767 WLAN_CIPHER_SUITE_CCMP,
768 WLAN_CIPHER_SUITE_CCMP_256,
769 WLAN_CIPHER_SUITE_GCMP,
770 WLAN_CIPHER_SUITE_GCMP_256,
771
772 /* keep last -- depends on hw flags! */
773 WLAN_CIPHER_SUITE_AES_CMAC,
774 WLAN_CIPHER_SUITE_BIP_CMAC_256,
775 WLAN_CIPHER_SUITE_BIP_GMAC_128,
776 WLAN_CIPHER_SUITE_BIP_GMAC_256,
777 };
778
779 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
780 local->hw.wiphy->cipher_suites) {
781 /* If the driver advertises, or doesn't support SW crypto,
782 * we only need to remove WEP if necessary.
783 */
784 if (have_wep)
785 return 0;
786
787 /* well if it has _no_ ciphers ... fine */
788 if (!local->hw.wiphy->n_cipher_suites)
789 return 0;
790
791 /* Driver provides cipher suites, but we need to exclude WEP */
792 suites = kmemdup(local->hw.wiphy->cipher_suites,
793 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
794 GFP_KERNEL);
795 if (!suites)
796 return -ENOMEM;
797
798 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
799 u32 suite = local->hw.wiphy->cipher_suites[r];
800
801 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
802 suite == WLAN_CIPHER_SUITE_WEP104)
803 continue;
804 suites[w++] = suite;
805 }
806 } else if (!local->hw.cipher_schemes) {
807 /* If the driver doesn't have cipher schemes, there's nothing
808 * else to do other than assign the (software supported and
809 * perhaps offloaded) cipher suites.
810 */
811 local->hw.wiphy->cipher_suites = cipher_suites;
812 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
813
814 if (!have_mfp)
815 local->hw.wiphy->n_cipher_suites -= 4;
816
817 if (!have_wep) {
818 local->hw.wiphy->cipher_suites += 2;
819 local->hw.wiphy->n_cipher_suites -= 2;
820 }
821
822 /* not dynamically allocated, so just return */
823 return 0;
824 } else {
825 const struct ieee80211_cipher_scheme *cs;
826
827 cs = local->hw.cipher_schemes;
828
829 /* Driver specifies cipher schemes only (but not cipher suites
830 * including the schemes)
831 *
832 * We start counting ciphers defined by schemes, TKIP, CCMP,
833 * CCMP-256, GCMP, and GCMP-256
834 */
835 n_suites = local->hw.n_cipher_schemes + 5;
836
837 /* check if we have WEP40 and WEP104 */
838 if (have_wep)
839 n_suites += 2;
840
841 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
842 * BIP-GMAC-256
843 */
844 if (have_mfp)
845 n_suites += 4;
846
847 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
848 if (!suites)
849 return -ENOMEM;
850
851 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
852 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
853 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
854 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
855 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
856
857 if (have_wep) {
858 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
859 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
860 }
861
862 if (have_mfp) {
863 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
864 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
865 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
866 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
867 }
868
869 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
870 suites[w++] = cs[r].cipher;
871 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
872 kfree(suites);
873 return -EINVAL;
874 }
875 }
876 }
877
878 local->hw.wiphy->cipher_suites = suites;
879 local->hw.wiphy->n_cipher_suites = w;
880 local->wiphy_ciphers_allocated = true;
881
882 return 0;
883 }
884
885 int ieee80211_register_hw(struct ieee80211_hw *hw)
886 {
887 struct ieee80211_local *local = hw_to_local(hw);
888 int result, i;
889 enum nl80211_band band;
890 int channels, max_bitrates;
891 bool supp_ht, supp_vht, supp_he;
892 struct cfg80211_chan_def dflt_chandef = {};
893
894 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
895 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
896 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
897 return -EINVAL;
898
899 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
900 (!local->ops->tdls_channel_switch ||
901 !local->ops->tdls_cancel_channel_switch ||
902 !local->ops->tdls_recv_channel_switch))
903 return -EOPNOTSUPP;
904
905 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
906 !local->ops->set_frag_threshold))
907 return -EINVAL;
908
909 if (WARN_ON(local->hw.wiphy->interface_modes &
910 BIT(NL80211_IFTYPE_NAN) &&
911 (!local->ops->start_nan || !local->ops->stop_nan)))
912 return -EINVAL;
913
914 #ifdef CONFIG_PM
915 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
916 return -EINVAL;
917 #endif
918
919 if (!local->use_chanctx) {
920 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
921 const struct ieee80211_iface_combination *comb;
922
923 comb = &local->hw.wiphy->iface_combinations[i];
924
925 if (comb->num_different_channels > 1)
926 return -EINVAL;
927 }
928 } else {
929 /*
930 * WDS is currently prohibited when channel contexts are used
931 * because there's no clear definition of which channel WDS
932 * type interfaces use
933 */
934 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
935 return -EINVAL;
936
937 /* DFS is not supported with multi-channel combinations yet */
938 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
939 const struct ieee80211_iface_combination *comb;
940
941 comb = &local->hw.wiphy->iface_combinations[i];
942
943 if (comb->radar_detect_widths &&
944 comb->num_different_channels > 1)
945 return -EINVAL;
946 }
947 }
948
949 /* Only HW csum features are currently compatible with mac80211 */
950 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
951 return -EINVAL;
952
953 if (hw->max_report_rates == 0)
954 hw->max_report_rates = hw->max_rates;
955
956 local->rx_chains = 1;
957
958 /*
959 * generic code guarantees at least one band,
960 * set this very early because much code assumes
961 * that hw.conf.channel is assigned
962 */
963 channels = 0;
964 max_bitrates = 0;
965 supp_ht = false;
966 supp_vht = false;
967 supp_he = false;
968 for (band = 0; band < NUM_NL80211_BANDS; band++) {
969 struct ieee80211_supported_band *sband;
970
971 sband = local->hw.wiphy->bands[band];
972 if (!sband)
973 continue;
974
975 if (!dflt_chandef.chan) {
976 cfg80211_chandef_create(&dflt_chandef,
977 &sband->channels[0],
978 NL80211_CHAN_NO_HT);
979 /* init channel we're on */
980 if (!local->use_chanctx && !local->_oper_chandef.chan) {
981 local->hw.conf.chandef = dflt_chandef;
982 local->_oper_chandef = dflt_chandef;
983 }
984 local->monitor_chandef = dflt_chandef;
985 }
986
987 channels += sband->n_channels;
988
989 if (max_bitrates < sband->n_bitrates)
990 max_bitrates = sband->n_bitrates;
991 supp_ht = supp_ht || sband->ht_cap.ht_supported;
992 supp_vht = supp_vht || sband->vht_cap.vht_supported;
993
994 if (!supp_he)
995 supp_he = !!ieee80211_get_he_sta_cap(sband);
996
997 /* HT, VHT, HE require QoS, thus >= 4 queues */
998 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
999 (supp_ht || supp_vht || supp_he)))
1000 return -EINVAL;
1001
1002 if (!sband->ht_cap.ht_supported)
1003 continue;
1004
1005 /* TODO: consider VHT for RX chains, hopefully it's the same */
1006 local->rx_chains =
1007 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1008 local->rx_chains);
1009
1010 /* no need to mask, SM_PS_DISABLED has all bits set */
1011 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1012 IEEE80211_HT_CAP_SM_PS_SHIFT;
1013 }
1014
1015 /* if low-level driver supports AP, we also support VLAN.
1016 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1017 * based on their support to transmit SW encrypted packets.
1018 */
1019 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1020 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1021 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1022 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1023 }
1024
1025 /* mac80211 always supports monitor */
1026 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1027 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1028
1029 /* mac80211 doesn't support more than one IBSS interface right now */
1030 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1031 const struct ieee80211_iface_combination *c;
1032 int j;
1033
1034 c = &hw->wiphy->iface_combinations[i];
1035
1036 for (j = 0; j < c->n_limits; j++)
1037 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1038 c->limits[j].max > 1)
1039 return -EINVAL;
1040 }
1041
1042 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1043 sizeof(void *) * channels, GFP_KERNEL);
1044 if (!local->int_scan_req)
1045 return -ENOMEM;
1046
1047 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1048 if (!local->hw.wiphy->bands[band])
1049 continue;
1050 local->int_scan_req->rates[band] = (u32) -1;
1051 }
1052
1053 #ifndef CONFIG_MAC80211_MESH
1054 /* mesh depends on Kconfig, but drivers should set it if they want */
1055 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1056 #endif
1057
1058 /* if the underlying driver supports mesh, mac80211 will (at least)
1059 * provide routing of mesh authentication frames to userspace */
1060 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1061 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1062
1063 /* mac80211 supports control port protocol changing */
1064 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1065
1066 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1067 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1068 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1069 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1070 if (hw->max_signal <= 0) {
1071 result = -EINVAL;
1072 goto fail_workqueue;
1073 }
1074 }
1075
1076 /* Mac80211 and therefore all drivers using SW crypto only
1077 * are able to handle PTK rekeys and Extended Key ID.
1078 */
1079 if (!local->ops->set_key) {
1080 wiphy_ext_feature_set(local->hw.wiphy,
1081 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1082 wiphy_ext_feature_set(local->hw.wiphy,
1083 NL80211_EXT_FEATURE_EXT_KEY_ID);
1084 }
1085
1086 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1087 wiphy_ext_feature_set(local->hw.wiphy,
1088 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1089
1090 /*
1091 * Calculate scan IE length -- we need this to alloc
1092 * memory and to subtract from the driver limit. It
1093 * includes the DS Params, (extended) supported rates, and HT
1094 * information -- SSID is the driver's responsibility.
1095 */
1096 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1097 3 /* DS Params */;
1098 if (supp_ht)
1099 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1100
1101 if (supp_vht)
1102 local->scan_ies_len +=
1103 2 + sizeof(struct ieee80211_vht_cap);
1104
1105 /* HE cap element is variable in size - set len to allow max size */
1106 /*
1107 * TODO: 1 is added at the end of the calculation to accommodate for
1108 * the temporary placing of the HE capabilities IE under EXT.
1109 * Remove it once it is placed in the final place.
1110 */
1111 if (supp_he)
1112 local->scan_ies_len +=
1113 2 + sizeof(struct ieee80211_he_cap_elem) +
1114 sizeof(struct ieee80211_he_mcs_nss_supp) +
1115 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1116
1117 if (!local->ops->hw_scan) {
1118 /* For hw_scan, driver needs to set these up. */
1119 local->hw.wiphy->max_scan_ssids = 4;
1120 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1121 }
1122
1123 /*
1124 * If the driver supports any scan IEs, then assume the
1125 * limit includes the IEs mac80211 will add, otherwise
1126 * leave it at zero and let the driver sort it out; we
1127 * still pass our IEs to the driver but userspace will
1128 * not be allowed to in that case.
1129 */
1130 if (local->hw.wiphy->max_scan_ie_len)
1131 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1132
1133 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1134 local->hw.n_cipher_schemes));
1135
1136 result = ieee80211_init_cipher_suites(local);
1137 if (result < 0)
1138 goto fail_workqueue;
1139
1140 if (!local->ops->remain_on_channel)
1141 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1142
1143 /* mac80211 based drivers don't support internal TDLS setup */
1144 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1145 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1146
1147 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1148 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1149 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1150
1151 /* mac80211 supports multi BSSID, if the driver supports it */
1152 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1153 local->hw.wiphy->support_mbssid = true;
1154 if (ieee80211_hw_check(&local->hw,
1155 SUPPORTS_ONLY_HE_MULTI_BSSID))
1156 local->hw.wiphy->support_only_he_mbssid = true;
1157 else
1158 local->ext_capa[2] |=
1159 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1160 }
1161
1162 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1163
1164 /*
1165 * We use the number of queues for feature tests (QoS, HT) internally
1166 * so restrict them appropriately.
1167 */
1168 if (hw->queues > IEEE80211_MAX_QUEUES)
1169 hw->queues = IEEE80211_MAX_QUEUES;
1170
1171 local->workqueue =
1172 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1173 if (!local->workqueue) {
1174 result = -ENOMEM;
1175 goto fail_workqueue;
1176 }
1177
1178 /*
1179 * The hardware needs headroom for sending the frame,
1180 * and we need some headroom for passing the frame to monitor
1181 * interfaces, but never both at the same time.
1182 */
1183 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1184 IEEE80211_TX_STATUS_HEADROOM);
1185
1186 /*
1187 * if the driver doesn't specify a max listen interval we
1188 * use 5 which should be a safe default
1189 */
1190 if (local->hw.max_listen_interval == 0)
1191 local->hw.max_listen_interval = 5;
1192
1193 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1194
1195 local->dynamic_ps_forced_timeout = -1;
1196
1197 if (!local->hw.max_nan_de_entries)
1198 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1199
1200 if (!local->hw.weight_multiplier)
1201 local->hw.weight_multiplier = 1;
1202
1203 ieee80211_wep_init(local);
1204
1205 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1206
1207 ieee80211_led_init(local);
1208
1209 result = ieee80211_txq_setup_flows(local);
1210 if (result)
1211 goto fail_flows;
1212
1213 rtnl_lock();
1214 result = ieee80211_init_rate_ctrl_alg(local,
1215 hw->rate_control_algorithm);
1216 rtnl_unlock();
1217 if (result < 0) {
1218 wiphy_debug(local->hw.wiphy,
1219 "Failed to initialize rate control algorithm\n");
1220 goto fail_rate;
1221 }
1222
1223 if (local->rate_ctrl) {
1224 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1225 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1226 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1227 }
1228
1229 /*
1230 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1231 * or have it when we don't, copy the sband structure and set/clear it.
1232 * This is necessary because rate scaling algorithms could be switched
1233 * and have different support values.
1234 * Print a message so that in the common case the reallocation can be
1235 * avoided.
1236 */
1237 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1238 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1239 struct ieee80211_supported_band *sband;
1240 bool local_cap, ie_cap;
1241
1242 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1243
1244 sband = local->hw.wiphy->bands[band];
1245 if (!sband || !sband->vht_cap.vht_supported)
1246 continue;
1247
1248 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1249 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1250
1251 if (local_cap == ie_cap)
1252 continue;
1253
1254 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1255 if (!sband) {
1256 result = -ENOMEM;
1257 goto fail_rate;
1258 }
1259
1260 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1261 band);
1262
1263 sband->vht_cap.vht_mcs.tx_highest ^=
1264 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1265
1266 local->hw.wiphy->bands[band] = sband;
1267 local->sband_allocated |= BIT(band);
1268 }
1269
1270 result = wiphy_register(local->hw.wiphy);
1271 if (result < 0)
1272 goto fail_wiphy_register;
1273
1274 debugfs_hw_add(local);
1275 rate_control_add_debugfs(local);
1276
1277 rtnl_lock();
1278
1279 /* add one default STA interface if supported */
1280 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1281 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1282 struct vif_params params = {0};
1283
1284 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1285 NL80211_IFTYPE_STATION, &params);
1286 if (result)
1287 wiphy_warn(local->hw.wiphy,
1288 "Failed to add default virtual iface\n");
1289 }
1290
1291 rtnl_unlock();
1292
1293 #ifdef CONFIG_INET
1294 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1295 result = register_inetaddr_notifier(&local->ifa_notifier);
1296 if (result)
1297 goto fail_ifa;
1298 #endif
1299
1300 #if IS_ENABLED(CONFIG_IPV6)
1301 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1302 result = register_inet6addr_notifier(&local->ifa6_notifier);
1303 if (result)
1304 goto fail_ifa6;
1305 #endif
1306
1307 return 0;
1308
1309 #if IS_ENABLED(CONFIG_IPV6)
1310 fail_ifa6:
1311 #ifdef CONFIG_INET
1312 unregister_inetaddr_notifier(&local->ifa_notifier);
1313 #endif
1314 #endif
1315 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1316 fail_ifa:
1317 #endif
1318 wiphy_unregister(local->hw.wiphy);
1319 fail_wiphy_register:
1320 rtnl_lock();
1321 rate_control_deinitialize(local);
1322 ieee80211_remove_interfaces(local);
1323 rtnl_unlock();
1324 fail_rate:
1325 fail_flows:
1326 ieee80211_led_exit(local);
1327 destroy_workqueue(local->workqueue);
1328 fail_workqueue:
1329 if (local->wiphy_ciphers_allocated)
1330 kfree(local->hw.wiphy->cipher_suites);
1331 kfree(local->int_scan_req);
1332 return result;
1333 }
1334 EXPORT_SYMBOL(ieee80211_register_hw);
1335
1336 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1337 {
1338 struct ieee80211_local *local = hw_to_local(hw);
1339
1340 tasklet_kill(&local->tx_pending_tasklet);
1341 tasklet_kill(&local->tasklet);
1342
1343 #ifdef CONFIG_INET
1344 unregister_inetaddr_notifier(&local->ifa_notifier);
1345 #endif
1346 #if IS_ENABLED(CONFIG_IPV6)
1347 unregister_inet6addr_notifier(&local->ifa6_notifier);
1348 #endif
1349
1350 rtnl_lock();
1351
1352 /*
1353 * At this point, interface list manipulations are fine
1354 * because the driver cannot be handing us frames any
1355 * more and the tasklet is killed.
1356 */
1357 ieee80211_remove_interfaces(local);
1358
1359 rtnl_unlock();
1360
1361 cancel_delayed_work_sync(&local->roc_work);
1362 cancel_work_sync(&local->restart_work);
1363 cancel_work_sync(&local->reconfig_filter);
1364 cancel_work_sync(&local->tdls_chsw_work);
1365 flush_work(&local->sched_scan_stopped_work);
1366 flush_work(&local->radar_detected_work);
1367
1368 ieee80211_clear_tx_pending(local);
1369 rate_control_deinitialize(local);
1370
1371 if (skb_queue_len(&local->skb_queue) ||
1372 skb_queue_len(&local->skb_queue_unreliable))
1373 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1374 skb_queue_purge(&local->skb_queue);
1375 skb_queue_purge(&local->skb_queue_unreliable);
1376 skb_queue_purge(&local->skb_queue_tdls_chsw);
1377
1378 wiphy_unregister(local->hw.wiphy);
1379 destroy_workqueue(local->workqueue);
1380 ieee80211_led_exit(local);
1381 kfree(local->int_scan_req);
1382 }
1383 EXPORT_SYMBOL(ieee80211_unregister_hw);
1384
1385 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1386 {
1387 WARN_ONCE(1, "Have pending ack frames!\n");
1388 kfree_skb(p);
1389 return 0;
1390 }
1391
1392 void ieee80211_free_hw(struct ieee80211_hw *hw)
1393 {
1394 struct ieee80211_local *local = hw_to_local(hw);
1395 enum nl80211_band band;
1396
1397 mutex_destroy(&local->iflist_mtx);
1398 mutex_destroy(&local->mtx);
1399
1400 if (local->wiphy_ciphers_allocated)
1401 kfree(local->hw.wiphy->cipher_suites);
1402
1403 idr_for_each(&local->ack_status_frames,
1404 ieee80211_free_ack_frame, NULL);
1405 idr_destroy(&local->ack_status_frames);
1406
1407 sta_info_stop(local);
1408
1409 ieee80211_free_led_names(local);
1410
1411 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1412 if (!(local->sband_allocated & BIT(band)))
1413 continue;
1414 kfree(local->hw.wiphy->bands[band]);
1415 }
1416
1417 wiphy_free(local->hw.wiphy);
1418 }
1419 EXPORT_SYMBOL(ieee80211_free_hw);
1420
1421 static int __init ieee80211_init(void)
1422 {
1423 struct sk_buff *skb;
1424 int ret;
1425
1426 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1427 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1428 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1429
1430 ret = rc80211_minstrel_init();
1431 if (ret)
1432 return ret;
1433
1434 ret = ieee80211_iface_init();
1435 if (ret)
1436 goto err_netdev;
1437
1438 return 0;
1439 err_netdev:
1440 rc80211_minstrel_exit();
1441
1442 return ret;
1443 }
1444
1445 static void __exit ieee80211_exit(void)
1446 {
1447 rc80211_minstrel_exit();
1448
1449 ieee80211s_stop();
1450
1451 ieee80211_iface_exit();
1452
1453 rcu_barrier();
1454 }
1455
1456
1457 subsys_initcall(ieee80211_init);
1458 module_exit(ieee80211_exit);
1459
1460 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1461 MODULE_LICENSE("GPL");
Linux with added FPC-III support