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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
36void 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 if (local->rx_mcast_action_reg)
68 new_flags |= FIF_MCAST_ACTION;
69
70 spin_lock_bh(&local->filter_lock);
71 changed_flags = local->filter_flags ^ new_flags;
72
73 mc = drv_prepare_multicast(local, &local->mc_list);
74 spin_unlock_bh(&local->filter_lock);
75
76 /* be a bit nasty */
77 new_flags |= (1<<31);
78
79 drv_configure_filter(local, changed_flags, &new_flags, mc);
80
81 WARN_ON(new_flags & (1<<31));
82
83 local->filter_flags = new_flags & ~(1<<31);
84}
85
86static void ieee80211_reconfig_filter(struct work_struct *work)
87{
88 struct ieee80211_local *local =
89 container_of(work, struct ieee80211_local, reconfig_filter);
90
91 ieee80211_configure_filter(local);
92}
93
94static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
95{
96 struct ieee80211_sub_if_data *sdata;
97 struct cfg80211_chan_def chandef = {};
98 u32 changed = 0;
99 int power;
100 u32 offchannel_flag;
101
102 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
103
104 if (local->scan_chandef.chan) {
105 chandef = local->scan_chandef;
106 } else if (local->tmp_channel) {
107 chandef.chan = local->tmp_channel;
108 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
109 chandef.center_freq1 = chandef.chan->center_freq;
110 chandef.freq1_offset = chandef.chan->freq_offset;
111 } else
112 chandef = local->_oper_chandef;
113
114 WARN(!cfg80211_chandef_valid(&chandef),
115 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
116 chandef.chan->center_freq, chandef.chan->freq_offset,
117 chandef.width, chandef.center_freq1, chandef.freq1_offset,
118 chandef.center_freq2);
119
120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122 else
123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
124
125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126
127 if (offchannel_flag ||
128 !cfg80211_chandef_identical(&local->hw.conf.chandef,
129 &local->_oper_chandef)) {
130 local->hw.conf.chandef = chandef;
131 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
132 }
133
134 if (!conf_is_ht(&local->hw.conf)) {
135 /*
136 * mac80211.h documents that this is only valid
137 * when the channel is set to an HT type, and
138 * that otherwise STATIC is used.
139 */
140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
141 } else if (local->hw.conf.smps_mode != local->smps_mode) {
142 local->hw.conf.smps_mode = local->smps_mode;
143 changed |= IEEE80211_CONF_CHANGE_SMPS;
144 }
145
146 power = ieee80211_chandef_max_power(&chandef);
147
148 rcu_read_lock();
149 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
150 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
151 continue;
152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153 continue;
154 if (sdata->vif.bss_conf.txpower == INT_MIN)
155 continue;
156 power = min(power, sdata->vif.bss_conf.txpower);
157 }
158 rcu_read_unlock();
159
160 if (local->hw.conf.power_level != power) {
161 changed |= IEEE80211_CONF_CHANGE_POWER;
162 local->hw.conf.power_level = power;
163 }
164
165 return changed;
166}
167
168int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
169{
170 int ret = 0;
171
172 might_sleep();
173
174 if (!local->use_chanctx)
175 changed |= ieee80211_hw_conf_chan(local);
176 else
177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
178 IEEE80211_CONF_CHANGE_POWER);
179
180 if (changed && local->open_count) {
181 ret = drv_config(local, changed);
182 /*
183 * Goal:
184 * HW reconfiguration should never fail, the driver has told
185 * us what it can support so it should live up to that promise.
186 *
187 * Current status:
188 * rfkill is not integrated with mac80211 and a
189 * configuration command can thus fail if hardware rfkill
190 * is enabled
191 *
192 * FIXME: integrate rfkill with mac80211 and then add this
193 * WARN_ON() back
194 *
195 */
196 /* WARN_ON(ret); */
197 }
198
199 return ret;
200}
201
202void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
203 u32 changed)
204{
205 struct ieee80211_local *local = sdata->local;
206
207 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
208 return;
209
210 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
211}
212
213u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
214{
215 sdata->vif.bss_conf.use_cts_prot = false;
216 sdata->vif.bss_conf.use_short_preamble = false;
217 sdata->vif.bss_conf.use_short_slot = false;
218 return BSS_CHANGED_ERP_CTS_PROT |
219 BSS_CHANGED_ERP_PREAMBLE |
220 BSS_CHANGED_ERP_SLOT;
221}
222
223static void ieee80211_tasklet_handler(unsigned long data)
224{
225 struct ieee80211_local *local = (struct ieee80211_local *) data;
226 struct sk_buff *skb;
227
228 while ((skb = skb_dequeue(&local->skb_queue)) ||
229 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
230 switch (skb->pkt_type) {
231 case IEEE80211_RX_MSG:
232 /* Clear skb->pkt_type in order to not confuse kernel
233 * netstack. */
234 skb->pkt_type = 0;
235 ieee80211_rx(&local->hw, skb);
236 break;
237 case IEEE80211_TX_STATUS_MSG:
238 skb->pkt_type = 0;
239 ieee80211_tx_status(&local->hw, skb);
240 break;
241 default:
242 WARN(1, "mac80211: Packet is of unknown type %d\n",
243 skb->pkt_type);
244 dev_kfree_skb(skb);
245 break;
246 }
247 }
248}
249
250static void ieee80211_restart_work(struct work_struct *work)
251{
252 struct ieee80211_local *local =
253 container_of(work, struct ieee80211_local, restart_work);
254 struct ieee80211_sub_if_data *sdata;
255
256 /* wait for scan work complete */
257 flush_workqueue(local->workqueue);
258 flush_work(&local->sched_scan_stopped_work);
259
260 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
261 "%s called with hardware scan in progress\n", __func__);
262
263 flush_work(&local->radar_detected_work);
264 rtnl_lock();
265 list_for_each_entry(sdata, &local->interfaces, list) {
266 /*
267 * XXX: there may be more work for other vif types and even
268 * for station mode: a good thing would be to run most of
269 * the iface type's dependent _stop (ieee80211_mg_stop,
270 * ieee80211_ibss_stop) etc...
271 * For now, fix only the specific bug that was seen: race
272 * between csa_connection_drop_work and us.
273 */
274 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
275 /*
276 * This worker is scheduled from the iface worker that
277 * runs on mac80211's workqueue, so we can't be
278 * scheduling this worker after the cancel right here.
279 * The exception is ieee80211_chswitch_done.
280 * Then we can have a race...
281 */
282 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
283 }
284 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
285 }
286 ieee80211_scan_cancel(local);
287
288 /* make sure any new ROC will consider local->in_reconfig */
289 flush_delayed_work(&local->roc_work);
290 flush_work(&local->hw_roc_done);
291
292 /* wait for all packet processing to be done */
293 synchronize_net();
294
295 ieee80211_reconfig(local);
296 rtnl_unlock();
297}
298
299void ieee80211_restart_hw(struct ieee80211_hw *hw)
300{
301 struct ieee80211_local *local = hw_to_local(hw);
302
303 trace_api_restart_hw(local);
304
305 wiphy_info(hw->wiphy,
306 "Hardware restart was requested\n");
307
308 /* use this reason, ieee80211_reconfig will unblock it */
309 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
310 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
311 false);
312
313 /*
314 * Stop all Rx during the reconfig. We don't want state changes
315 * or driver callbacks while this is in progress.
316 */
317 local->in_reconfig = true;
318 barrier();
319
320 queue_work(system_freezable_wq, &local->restart_work);
321}
322EXPORT_SYMBOL(ieee80211_restart_hw);
323
324#ifdef CONFIG_INET
325static int ieee80211_ifa_changed(struct notifier_block *nb,
326 unsigned long data, void *arg)
327{
328 struct in_ifaddr *ifa = arg;
329 struct ieee80211_local *local =
330 container_of(nb, struct ieee80211_local,
331 ifa_notifier);
332 struct net_device *ndev = ifa->ifa_dev->dev;
333 struct wireless_dev *wdev = ndev->ieee80211_ptr;
334 struct in_device *idev;
335 struct ieee80211_sub_if_data *sdata;
336 struct ieee80211_bss_conf *bss_conf;
337 struct ieee80211_if_managed *ifmgd;
338 int c = 0;
339
340 /* Make sure it's our interface that got changed */
341 if (!wdev)
342 return NOTIFY_DONE;
343
344 if (wdev->wiphy != local->hw.wiphy)
345 return NOTIFY_DONE;
346
347 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
348 bss_conf = &sdata->vif.bss_conf;
349
350 /* ARP filtering is only supported in managed mode */
351 if (sdata->vif.type != NL80211_IFTYPE_STATION)
352 return NOTIFY_DONE;
353
354 idev = __in_dev_get_rtnl(sdata->dev);
355 if (!idev)
356 return NOTIFY_DONE;
357
358 ifmgd = &sdata->u.mgd;
359 sdata_lock(sdata);
360
361 /* Copy the addresses to the bss_conf list */
362 ifa = rtnl_dereference(idev->ifa_list);
363 while (ifa) {
364 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
365 bss_conf->arp_addr_list[c] = ifa->ifa_address;
366 ifa = rtnl_dereference(ifa->ifa_next);
367 c++;
368 }
369
370 bss_conf->arp_addr_cnt = c;
371
372 /* Configure driver only if associated (which also implies it is up) */
373 if (ifmgd->associated)
374 ieee80211_bss_info_change_notify(sdata,
375 BSS_CHANGED_ARP_FILTER);
376
377 sdata_unlock(sdata);
378
379 return NOTIFY_OK;
380}
381#endif
382
383#if IS_ENABLED(CONFIG_IPV6)
384static int ieee80211_ifa6_changed(struct notifier_block *nb,
385 unsigned long data, void *arg)
386{
387 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
388 struct inet6_dev *idev = ifa->idev;
389 struct net_device *ndev = ifa->idev->dev;
390 struct ieee80211_local *local =
391 container_of(nb, struct ieee80211_local, ifa6_notifier);
392 struct wireless_dev *wdev = ndev->ieee80211_ptr;
393 struct ieee80211_sub_if_data *sdata;
394
395 /* Make sure it's our interface that got changed */
396 if (!wdev || wdev->wiphy != local->hw.wiphy)
397 return NOTIFY_DONE;
398
399 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
400
401 /*
402 * For now only support station mode. This is mostly because
403 * doing AP would have to handle AP_VLAN in some way ...
404 */
405 if (sdata->vif.type != NL80211_IFTYPE_STATION)
406 return NOTIFY_DONE;
407
408 drv_ipv6_addr_change(local, sdata, idev);
409
410 return NOTIFY_OK;
411}
412#endif
413
414/* There isn't a lot of sense in it, but you can transmit anything you like */
415static const struct ieee80211_txrx_stypes
416ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
417 [NL80211_IFTYPE_ADHOC] = {
418 .tx = 0xffff,
419 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
420 BIT(IEEE80211_STYPE_AUTH >> 4) |
421 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
423 },
424 [NL80211_IFTYPE_STATION] = {
425 .tx = 0xffff,
426 /*
427 * To support Pre Association Security Negotiation (PASN) while
428 * already associated to one AP, allow user space to register to
429 * Rx authentication frames, so that the user space logic would
430 * be able to receive/handle authentication frames from a
431 * different AP as part of PASN.
432 * It is expected that user space would intelligently register
433 * for Rx authentication frames, i.e., only when PASN is used
434 * and configure a match filter only for PASN authentication
435 * algorithm, as otherwise the MLME functionality of mac80211
436 * would be broken.
437 */
438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
439 BIT(IEEE80211_STYPE_AUTH >> 4) |
440 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
441 },
442 [NL80211_IFTYPE_AP] = {
443 .tx = 0xffff,
444 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
445 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
447 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
448 BIT(IEEE80211_STYPE_AUTH >> 4) |
449 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
450 BIT(IEEE80211_STYPE_ACTION >> 4),
451 },
452 [NL80211_IFTYPE_AP_VLAN] = {
453 /* copy AP */
454 .tx = 0xffff,
455 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
456 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
457 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
458 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
459 BIT(IEEE80211_STYPE_AUTH >> 4) |
460 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
461 BIT(IEEE80211_STYPE_ACTION >> 4),
462 },
463 [NL80211_IFTYPE_P2P_CLIENT] = {
464 .tx = 0xffff,
465 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
466 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
467 },
468 [NL80211_IFTYPE_P2P_GO] = {
469 .tx = 0xffff,
470 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
471 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
473 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
474 BIT(IEEE80211_STYPE_AUTH >> 4) |
475 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
476 BIT(IEEE80211_STYPE_ACTION >> 4),
477 },
478 [NL80211_IFTYPE_MESH_POINT] = {
479 .tx = 0xffff,
480 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
481 BIT(IEEE80211_STYPE_AUTH >> 4) |
482 BIT(IEEE80211_STYPE_DEAUTH >> 4),
483 },
484 [NL80211_IFTYPE_P2P_DEVICE] = {
485 .tx = 0xffff,
486 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
487 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
488 },
489};
490
491static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
492 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
493 IEEE80211_HT_AMPDU_PARM_DENSITY,
494
495 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
496 IEEE80211_HT_CAP_MAX_AMSDU |
497 IEEE80211_HT_CAP_SGI_20 |
498 IEEE80211_HT_CAP_SGI_40 |
499 IEEE80211_HT_CAP_TX_STBC |
500 IEEE80211_HT_CAP_RX_STBC |
501 IEEE80211_HT_CAP_LDPC_CODING |
502 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
503 .mcs = {
504 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
505 0xff, 0xff, 0xff, 0xff, 0xff, },
506 },
507};
508
509static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
510 .vht_cap_info =
511 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
512 IEEE80211_VHT_CAP_SHORT_GI_80 |
513 IEEE80211_VHT_CAP_SHORT_GI_160 |
514 IEEE80211_VHT_CAP_RXSTBC_MASK |
515 IEEE80211_VHT_CAP_TXSTBC |
516 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
517 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
518 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
519 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
520 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
521 .supp_mcs = {
522 .rx_mcs_map = cpu_to_le16(~0),
523 .tx_mcs_map = cpu_to_le16(~0),
524 },
525};
526
527struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
528 const struct ieee80211_ops *ops,
529 const char *requested_name)
530{
531 struct ieee80211_local *local;
532 int priv_size, i;
533 struct wiphy *wiphy;
534 bool use_chanctx;
535
536 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
537 !ops->add_interface || !ops->remove_interface ||
538 !ops->configure_filter))
539 return NULL;
540
541 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
542 return NULL;
543
544 /* check all or no channel context operations exist */
545 i = !!ops->add_chanctx + !!ops->remove_chanctx +
546 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
547 !!ops->unassign_vif_chanctx;
548 if (WARN_ON(i != 0 && i != 5))
549 return NULL;
550 use_chanctx = i == 5;
551
552 /* Ensure 32-byte alignment of our private data and hw private data.
553 * We use the wiphy priv data for both our ieee80211_local and for
554 * the driver's private data
555 *
556 * In memory it'll be like this:
557 *
558 * +-------------------------+
559 * | struct wiphy |
560 * +-------------------------+
561 * | struct ieee80211_local |
562 * +-------------------------+
563 * | driver's private data |
564 * +-------------------------+
565 *
566 */
567 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
568
569 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
570
571 if (!wiphy)
572 return NULL;
573
574 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
575
576 wiphy->privid = mac80211_wiphy_privid;
577
578 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
579 WIPHY_FLAG_4ADDR_AP |
580 WIPHY_FLAG_4ADDR_STATION |
581 WIPHY_FLAG_REPORTS_OBSS |
582 WIPHY_FLAG_OFFCHAN_TX;
583
584 if (!use_chanctx || ops->remain_on_channel)
585 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
586
587 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
588 NL80211_FEATURE_SAE |
589 NL80211_FEATURE_HT_IBSS |
590 NL80211_FEATURE_VIF_TXPOWER |
591 NL80211_FEATURE_MAC_ON_CREATE |
592 NL80211_FEATURE_USERSPACE_MPM |
593 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
594 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
595 wiphy_ext_feature_set(wiphy,
596 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
597 wiphy_ext_feature_set(wiphy,
598 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
599 wiphy_ext_feature_set(wiphy,
600 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
601 wiphy_ext_feature_set(wiphy,
602 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
603
604 if (!ops->hw_scan) {
605 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
606 NL80211_FEATURE_AP_SCAN;
607 /*
608 * if the driver behaves correctly using the probe request
609 * (template) from mac80211, then both of these should be
610 * supported even with hw scan - but let drivers opt in.
611 */
612 wiphy_ext_feature_set(wiphy,
613 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
614 wiphy_ext_feature_set(wiphy,
615 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
616 }
617
618 if (!ops->set_key)
619 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
620
621 if (ops->wake_tx_queue)
622 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
623
624 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
625
626 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
627
628 local = wiphy_priv(wiphy);
629
630 if (sta_info_init(local))
631 goto err_free;
632
633 local->hw.wiphy = wiphy;
634
635 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
636
637 local->ops = ops;
638 local->use_chanctx = use_chanctx;
639
640 /*
641 * We need a bit of data queued to build aggregates properly, so
642 * instruct the TCP stack to allow more than a single ms of data
643 * to be queued in the stack. The value is a bit-shift of 1
644 * second, so 7 is ~8ms of queued data. Only affects local TCP
645 * sockets.
646 * This is the default, anyhow - drivers may need to override it
647 * for local reasons (longer buffers, longer completion time, or
648 * similar).
649 */
650 local->hw.tx_sk_pacing_shift = 7;
651
652 /* set up some defaults */
653 local->hw.queues = 1;
654 local->hw.max_rates = 1;
655 local->hw.max_report_rates = 0;
656 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
657 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
658 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
659 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
660 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
661 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
662 IEEE80211_RADIOTAP_MCS_HAVE_GI |
663 IEEE80211_RADIOTAP_MCS_HAVE_BW;
664 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
665 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
666 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
667 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
668 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
669 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
670 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
671 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
672
673 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
674
675 wiphy->extended_capabilities = local->ext_capa;
676 wiphy->extended_capabilities_mask = local->ext_capa;
677 wiphy->extended_capabilities_len =
678 ARRAY_SIZE(local->ext_capa);
679
680 INIT_LIST_HEAD(&local->interfaces);
681 INIT_LIST_HEAD(&local->mon_list);
682
683 __hw_addr_init(&local->mc_list);
684
685 mutex_init(&local->iflist_mtx);
686 mutex_init(&local->mtx);
687
688 mutex_init(&local->key_mtx);
689 spin_lock_init(&local->filter_lock);
690 spin_lock_init(&local->rx_path_lock);
691 spin_lock_init(&local->queue_stop_reason_lock);
692
693 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
694 INIT_LIST_HEAD(&local->active_txqs[i]);
695 spin_lock_init(&local->active_txq_lock[i]);
696 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
697 local->aql_txq_limit_high[i] =
698 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
699 }
700
701 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
702 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
703 atomic_set(&local->aql_total_pending_airtime, 0);
704
705 INIT_LIST_HEAD(&local->chanctx_list);
706 mutex_init(&local->chanctx_mtx);
707
708 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
709
710 INIT_WORK(&local->restart_work, ieee80211_restart_work);
711
712 INIT_WORK(&local->radar_detected_work,
713 ieee80211_dfs_radar_detected_work);
714
715 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
716 local->smps_mode = IEEE80211_SMPS_OFF;
717
718 INIT_WORK(&local->dynamic_ps_enable_work,
719 ieee80211_dynamic_ps_enable_work);
720 INIT_WORK(&local->dynamic_ps_disable_work,
721 ieee80211_dynamic_ps_disable_work);
722 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
723
724 INIT_WORK(&local->sched_scan_stopped_work,
725 ieee80211_sched_scan_stopped_work);
726
727 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
728
729 spin_lock_init(&local->ack_status_lock);
730 idr_init(&local->ack_status_frames);
731
732 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
733 skb_queue_head_init(&local->pending[i]);
734 atomic_set(&local->agg_queue_stop[i], 0);
735 }
736 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
737 (unsigned long)local);
738
739 if (ops->wake_tx_queue)
740 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
741 (unsigned long)local);
742
743 tasklet_init(&local->tasklet,
744 ieee80211_tasklet_handler,
745 (unsigned long) local);
746
747 skb_queue_head_init(&local->skb_queue);
748 skb_queue_head_init(&local->skb_queue_unreliable);
749 skb_queue_head_init(&local->skb_queue_tdls_chsw);
750
751 ieee80211_alloc_led_names(local);
752
753 ieee80211_roc_setup(local);
754
755 local->hw.radiotap_timestamp.units_pos = -1;
756 local->hw.radiotap_timestamp.accuracy = -1;
757
758 return &local->hw;
759 err_free:
760 wiphy_free(wiphy);
761 return NULL;
762}
763EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
764
765static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
766{
767 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
768 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
769 int n_suites = 0, r = 0, w = 0;
770 u32 *suites;
771 static const u32 cipher_suites[] = {
772 /* keep WEP first, it may be removed below */
773 WLAN_CIPHER_SUITE_WEP40,
774 WLAN_CIPHER_SUITE_WEP104,
775 WLAN_CIPHER_SUITE_TKIP,
776 WLAN_CIPHER_SUITE_CCMP,
777 WLAN_CIPHER_SUITE_CCMP_256,
778 WLAN_CIPHER_SUITE_GCMP,
779 WLAN_CIPHER_SUITE_GCMP_256,
780
781 /* keep last -- depends on hw flags! */
782 WLAN_CIPHER_SUITE_AES_CMAC,
783 WLAN_CIPHER_SUITE_BIP_CMAC_256,
784 WLAN_CIPHER_SUITE_BIP_GMAC_128,
785 WLAN_CIPHER_SUITE_BIP_GMAC_256,
786 };
787
788 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
789 local->hw.wiphy->cipher_suites) {
790 /* If the driver advertises, or doesn't support SW crypto,
791 * we only need to remove WEP if necessary.
792 */
793 if (have_wep)
794 return 0;
795
796 /* well if it has _no_ ciphers ... fine */
797 if (!local->hw.wiphy->n_cipher_suites)
798 return 0;
799
800 /* Driver provides cipher suites, but we need to exclude WEP */
801 suites = kmemdup(local->hw.wiphy->cipher_suites,
802 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
803 GFP_KERNEL);
804 if (!suites)
805 return -ENOMEM;
806
807 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
808 u32 suite = local->hw.wiphy->cipher_suites[r];
809
810 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
811 suite == WLAN_CIPHER_SUITE_WEP104)
812 continue;
813 suites[w++] = suite;
814 }
815 } else if (!local->hw.cipher_schemes) {
816 /* If the driver doesn't have cipher schemes, there's nothing
817 * else to do other than assign the (software supported and
818 * perhaps offloaded) cipher suites.
819 */
820 local->hw.wiphy->cipher_suites = cipher_suites;
821 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
822
823 if (!have_mfp)
824 local->hw.wiphy->n_cipher_suites -= 4;
825
826 if (!have_wep) {
827 local->hw.wiphy->cipher_suites += 2;
828 local->hw.wiphy->n_cipher_suites -= 2;
829 }
830
831 /* not dynamically allocated, so just return */
832 return 0;
833 } else {
834 const struct ieee80211_cipher_scheme *cs;
835
836 cs = local->hw.cipher_schemes;
837
838 /* Driver specifies cipher schemes only (but not cipher suites
839 * including the schemes)
840 *
841 * We start counting ciphers defined by schemes, TKIP, CCMP,
842 * CCMP-256, GCMP, and GCMP-256
843 */
844 n_suites = local->hw.n_cipher_schemes + 5;
845
846 /* check if we have WEP40 and WEP104 */
847 if (have_wep)
848 n_suites += 2;
849
850 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
851 * BIP-GMAC-256
852 */
853 if (have_mfp)
854 n_suites += 4;
855
856 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
857 if (!suites)
858 return -ENOMEM;
859
860 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
861 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
862 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
863 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
864 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
865
866 if (have_wep) {
867 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
868 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
869 }
870
871 if (have_mfp) {
872 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
873 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
874 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
875 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
876 }
877
878 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
879 suites[w++] = cs[r].cipher;
880 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
881 kfree(suites);
882 return -EINVAL;
883 }
884 }
885 }
886
887 local->hw.wiphy->cipher_suites = suites;
888 local->hw.wiphy->n_cipher_suites = w;
889 local->wiphy_ciphers_allocated = true;
890
891 return 0;
892}
893
894int ieee80211_register_hw(struct ieee80211_hw *hw)
895{
896 struct ieee80211_local *local = hw_to_local(hw);
897 int result, i;
898 enum nl80211_band band;
899 int channels, max_bitrates;
900 bool supp_ht, supp_vht, supp_he;
901 struct cfg80211_chan_def dflt_chandef = {};
902
903 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
904 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
905 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
906 return -EINVAL;
907
908 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
909 (!local->ops->tdls_channel_switch ||
910 !local->ops->tdls_cancel_channel_switch ||
911 !local->ops->tdls_recv_channel_switch))
912 return -EOPNOTSUPP;
913
914 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
915 !local->ops->set_frag_threshold))
916 return -EINVAL;
917
918 if (WARN_ON(local->hw.wiphy->interface_modes &
919 BIT(NL80211_IFTYPE_NAN) &&
920 (!local->ops->start_nan || !local->ops->stop_nan)))
921 return -EINVAL;
922
923#ifdef CONFIG_PM
924 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
925 return -EINVAL;
926#endif
927
928 if (!local->use_chanctx) {
929 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
930 const struct ieee80211_iface_combination *comb;
931
932 comb = &local->hw.wiphy->iface_combinations[i];
933
934 if (comb->num_different_channels > 1)
935 return -EINVAL;
936 }
937 } else {
938 /*
939 * WDS is currently prohibited when channel contexts are used
940 * because there's no clear definition of which channel WDS
941 * type interfaces use
942 */
943 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
944 return -EINVAL;
945
946 /* DFS is not supported with multi-channel combinations yet */
947 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
948 const struct ieee80211_iface_combination *comb;
949
950 comb = &local->hw.wiphy->iface_combinations[i];
951
952 if (comb->radar_detect_widths &&
953 comb->num_different_channels > 1)
954 return -EINVAL;
955 }
956 }
957
958 /* Only HW csum features are currently compatible with mac80211 */
959 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
960 return -EINVAL;
961
962 if (hw->max_report_rates == 0)
963 hw->max_report_rates = hw->max_rates;
964
965 local->rx_chains = 1;
966
967 /*
968 * generic code guarantees at least one band,
969 * set this very early because much code assumes
970 * that hw.conf.channel is assigned
971 */
972 channels = 0;
973 max_bitrates = 0;
974 supp_ht = false;
975 supp_vht = false;
976 supp_he = false;
977 for (band = 0; band < NUM_NL80211_BANDS; band++) {
978 struct ieee80211_supported_band *sband;
979
980 sband = local->hw.wiphy->bands[band];
981 if (!sband)
982 continue;
983
984 if (!dflt_chandef.chan) {
985 cfg80211_chandef_create(&dflt_chandef,
986 &sband->channels[0],
987 NL80211_CHAN_NO_HT);
988 /* init channel we're on */
989 if (!local->use_chanctx && !local->_oper_chandef.chan) {
990 local->hw.conf.chandef = dflt_chandef;
991 local->_oper_chandef = dflt_chandef;
992 }
993 local->monitor_chandef = dflt_chandef;
994 }
995
996 channels += sband->n_channels;
997
998 if (max_bitrates < sband->n_bitrates)
999 max_bitrates = sband->n_bitrates;
1000 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1001 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1002
1003 if (!supp_he)
1004 supp_he = !!ieee80211_get_he_sta_cap(sband);
1005
1006 /* HT, VHT, HE require QoS, thus >= 4 queues */
1007 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1008 (supp_ht || supp_vht || supp_he)))
1009 return -EINVAL;
1010
1011 if (!sband->ht_cap.ht_supported)
1012 continue;
1013
1014 /* TODO: consider VHT for RX chains, hopefully it's the same */
1015 local->rx_chains =
1016 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1017 local->rx_chains);
1018
1019 /* no need to mask, SM_PS_DISABLED has all bits set */
1020 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1021 IEEE80211_HT_CAP_SM_PS_SHIFT;
1022 }
1023
1024 /* if low-level driver supports AP, we also support VLAN.
1025 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1026 * based on their support to transmit SW encrypted packets.
1027 */
1028 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1029 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1030 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1031 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1032 }
1033
1034 /* mac80211 always supports monitor */
1035 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1036 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1037
1038 /* mac80211 doesn't support more than one IBSS interface right now */
1039 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1040 const struct ieee80211_iface_combination *c;
1041 int j;
1042
1043 c = &hw->wiphy->iface_combinations[i];
1044
1045 for (j = 0; j < c->n_limits; j++)
1046 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1047 c->limits[j].max > 1)
1048 return -EINVAL;
1049 }
1050
1051 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1052 sizeof(void *) * channels, GFP_KERNEL);
1053 if (!local->int_scan_req)
1054 return -ENOMEM;
1055
1056 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1057 if (!local->hw.wiphy->bands[band])
1058 continue;
1059 local->int_scan_req->rates[band] = (u32) -1;
1060 }
1061
1062#ifndef CONFIG_MAC80211_MESH
1063 /* mesh depends on Kconfig, but drivers should set it if they want */
1064 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1065#endif
1066
1067 /* if the underlying driver supports mesh, mac80211 will (at least)
1068 * provide routing of mesh authentication frames to userspace */
1069 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1070 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1071
1072 /* mac80211 supports control port protocol changing */
1073 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1074
1075 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1076 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1077 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1078 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1079 if (hw->max_signal <= 0) {
1080 result = -EINVAL;
1081 goto fail_workqueue;
1082 }
1083 }
1084
1085 /* Mac80211 and therefore all drivers using SW crypto only
1086 * are able to handle PTK rekeys and Extended Key ID.
1087 */
1088 if (!local->ops->set_key) {
1089 wiphy_ext_feature_set(local->hw.wiphy,
1090 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1091 wiphy_ext_feature_set(local->hw.wiphy,
1092 NL80211_EXT_FEATURE_EXT_KEY_ID);
1093 }
1094
1095 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1096 wiphy_ext_feature_set(local->hw.wiphy,
1097 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1098
1099 /*
1100 * Calculate scan IE length -- we need this to alloc
1101 * memory and to subtract from the driver limit. It
1102 * includes the DS Params, (extended) supported rates, and HT
1103 * information -- SSID is the driver's responsibility.
1104 */
1105 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1106 3 /* DS Params */;
1107 if (supp_ht)
1108 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1109
1110 if (supp_vht)
1111 local->scan_ies_len +=
1112 2 + sizeof(struct ieee80211_vht_cap);
1113
1114 /* HE cap element is variable in size - set len to allow max size */
1115 /*
1116 * TODO: 1 is added at the end of the calculation to accommodate for
1117 * the temporary placing of the HE capabilities IE under EXT.
1118 * Remove it once it is placed in the final place.
1119 */
1120 if (supp_he)
1121 local->scan_ies_len +=
1122 2 + sizeof(struct ieee80211_he_cap_elem) +
1123 sizeof(struct ieee80211_he_mcs_nss_supp) +
1124 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1125
1126 if (!local->ops->hw_scan) {
1127 /* For hw_scan, driver needs to set these up. */
1128 local->hw.wiphy->max_scan_ssids = 4;
1129 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1130 }
1131
1132 /*
1133 * If the driver supports any scan IEs, then assume the
1134 * limit includes the IEs mac80211 will add, otherwise
1135 * leave it at zero and let the driver sort it out; we
1136 * still pass our IEs to the driver but userspace will
1137 * not be allowed to in that case.
1138 */
1139 if (local->hw.wiphy->max_scan_ie_len)
1140 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1141
1142 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1143 local->hw.n_cipher_schemes));
1144
1145 result = ieee80211_init_cipher_suites(local);
1146 if (result < 0)
1147 goto fail_workqueue;
1148
1149 if (!local->ops->remain_on_channel)
1150 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1151
1152 /* mac80211 based drivers don't support internal TDLS setup */
1153 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1154 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1155
1156 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1157 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1158 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1159
1160 /* mac80211 supports multi BSSID, if the driver supports it */
1161 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1162 local->hw.wiphy->support_mbssid = true;
1163 if (ieee80211_hw_check(&local->hw,
1164 SUPPORTS_ONLY_HE_MULTI_BSSID))
1165 local->hw.wiphy->support_only_he_mbssid = true;
1166 else
1167 local->ext_capa[2] |=
1168 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1169 }
1170
1171 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1172
1173 /*
1174 * We use the number of queues for feature tests (QoS, HT) internally
1175 * so restrict them appropriately.
1176 */
1177 if (hw->queues > IEEE80211_MAX_QUEUES)
1178 hw->queues = IEEE80211_MAX_QUEUES;
1179
1180 local->workqueue =
1181 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1182 if (!local->workqueue) {
1183 result = -ENOMEM;
1184 goto fail_workqueue;
1185 }
1186
1187 /*
1188 * The hardware needs headroom for sending the frame,
1189 * and we need some headroom for passing the frame to monitor
1190 * interfaces, but never both at the same time.
1191 */
1192 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1193 IEEE80211_TX_STATUS_HEADROOM);
1194
1195 /*
1196 * if the driver doesn't specify a max listen interval we
1197 * use 5 which should be a safe default
1198 */
1199 if (local->hw.max_listen_interval == 0)
1200 local->hw.max_listen_interval = 5;
1201
1202 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1203
1204 local->dynamic_ps_forced_timeout = -1;
1205
1206 if (!local->hw.max_nan_de_entries)
1207 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1208
1209 if (!local->hw.weight_multiplier)
1210 local->hw.weight_multiplier = 1;
1211
1212 ieee80211_wep_init(local);
1213
1214 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1215
1216 ieee80211_led_init(local);
1217
1218 result = ieee80211_txq_setup_flows(local);
1219 if (result)
1220 goto fail_flows;
1221
1222 rtnl_lock();
1223 result = ieee80211_init_rate_ctrl_alg(local,
1224 hw->rate_control_algorithm);
1225 rtnl_unlock();
1226 if (result < 0) {
1227 wiphy_debug(local->hw.wiphy,
1228 "Failed to initialize rate control algorithm\n");
1229 goto fail_rate;
1230 }
1231
1232 if (local->rate_ctrl) {
1233 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1234 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1235 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1236 }
1237
1238 /*
1239 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1240 * or have it when we don't, copy the sband structure and set/clear it.
1241 * This is necessary because rate scaling algorithms could be switched
1242 * and have different support values.
1243 * Print a message so that in the common case the reallocation can be
1244 * avoided.
1245 */
1246 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1247 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1248 struct ieee80211_supported_band *sband;
1249 bool local_cap, ie_cap;
1250
1251 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1252
1253 sband = local->hw.wiphy->bands[band];
1254 if (!sband || !sband->vht_cap.vht_supported)
1255 continue;
1256
1257 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1258 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1259
1260 if (local_cap == ie_cap)
1261 continue;
1262
1263 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1264 if (!sband) {
1265 result = -ENOMEM;
1266 goto fail_rate;
1267 }
1268
1269 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1270 band);
1271
1272 sband->vht_cap.vht_mcs.tx_highest ^=
1273 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1274
1275 local->hw.wiphy->bands[band] = sband;
1276 local->sband_allocated |= BIT(band);
1277 }
1278
1279 result = wiphy_register(local->hw.wiphy);
1280 if (result < 0)
1281 goto fail_wiphy_register;
1282
1283 debugfs_hw_add(local);
1284 rate_control_add_debugfs(local);
1285
1286 rtnl_lock();
1287
1288 /* add one default STA interface if supported */
1289 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1290 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1291 struct vif_params params = {0};
1292
1293 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1294 NL80211_IFTYPE_STATION, ¶ms);
1295 if (result)
1296 wiphy_warn(local->hw.wiphy,
1297 "Failed to add default virtual iface\n");
1298 }
1299
1300 rtnl_unlock();
1301
1302#ifdef CONFIG_INET
1303 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1304 result = register_inetaddr_notifier(&local->ifa_notifier);
1305 if (result)
1306 goto fail_ifa;
1307#endif
1308
1309#if IS_ENABLED(CONFIG_IPV6)
1310 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1311 result = register_inet6addr_notifier(&local->ifa6_notifier);
1312 if (result)
1313 goto fail_ifa6;
1314#endif
1315
1316 return 0;
1317
1318#if IS_ENABLED(CONFIG_IPV6)
1319 fail_ifa6:
1320#ifdef CONFIG_INET
1321 unregister_inetaddr_notifier(&local->ifa_notifier);
1322#endif
1323#endif
1324#if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1325 fail_ifa:
1326#endif
1327 wiphy_unregister(local->hw.wiphy);
1328 fail_wiphy_register:
1329 rtnl_lock();
1330 rate_control_deinitialize(local);
1331 ieee80211_remove_interfaces(local);
1332 rtnl_unlock();
1333 fail_rate:
1334 fail_flows:
1335 ieee80211_led_exit(local);
1336 destroy_workqueue(local->workqueue);
1337 fail_workqueue:
1338 if (local->wiphy_ciphers_allocated)
1339 kfree(local->hw.wiphy->cipher_suites);
1340 kfree(local->int_scan_req);
1341 return result;
1342}
1343EXPORT_SYMBOL(ieee80211_register_hw);
1344
1345void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1346{
1347 struct ieee80211_local *local = hw_to_local(hw);
1348
1349 tasklet_kill(&local->tx_pending_tasklet);
1350 tasklet_kill(&local->tasklet);
1351
1352#ifdef CONFIG_INET
1353 unregister_inetaddr_notifier(&local->ifa_notifier);
1354#endif
1355#if IS_ENABLED(CONFIG_IPV6)
1356 unregister_inet6addr_notifier(&local->ifa6_notifier);
1357#endif
1358
1359 rtnl_lock();
1360
1361 /*
1362 * At this point, interface list manipulations are fine
1363 * because the driver cannot be handing us frames any
1364 * more and the tasklet is killed.
1365 */
1366 ieee80211_remove_interfaces(local);
1367
1368 rtnl_unlock();
1369
1370 cancel_delayed_work_sync(&local->roc_work);
1371 cancel_work_sync(&local->restart_work);
1372 cancel_work_sync(&local->reconfig_filter);
1373 cancel_work_sync(&local->tdls_chsw_work);
1374 flush_work(&local->sched_scan_stopped_work);
1375 flush_work(&local->radar_detected_work);
1376
1377 ieee80211_clear_tx_pending(local);
1378 rate_control_deinitialize(local);
1379
1380 if (skb_queue_len(&local->skb_queue) ||
1381 skb_queue_len(&local->skb_queue_unreliable))
1382 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1383 skb_queue_purge(&local->skb_queue);
1384 skb_queue_purge(&local->skb_queue_unreliable);
1385 skb_queue_purge(&local->skb_queue_tdls_chsw);
1386
1387 wiphy_unregister(local->hw.wiphy);
1388 destroy_workqueue(local->workqueue);
1389 ieee80211_led_exit(local);
1390 kfree(local->int_scan_req);
1391}
1392EXPORT_SYMBOL(ieee80211_unregister_hw);
1393
1394static int ieee80211_free_ack_frame(int id, void *p, void *data)
1395{
1396 WARN_ONCE(1, "Have pending ack frames!\n");
1397 kfree_skb(p);
1398 return 0;
1399}
1400
1401void ieee80211_free_hw(struct ieee80211_hw *hw)
1402{
1403 struct ieee80211_local *local = hw_to_local(hw);
1404 enum nl80211_band band;
1405
1406 mutex_destroy(&local->iflist_mtx);
1407 mutex_destroy(&local->mtx);
1408
1409 if (local->wiphy_ciphers_allocated)
1410 kfree(local->hw.wiphy->cipher_suites);
1411
1412 idr_for_each(&local->ack_status_frames,
1413 ieee80211_free_ack_frame, NULL);
1414 idr_destroy(&local->ack_status_frames);
1415
1416 sta_info_stop(local);
1417
1418 ieee80211_free_led_names(local);
1419
1420 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1421 if (!(local->sband_allocated & BIT(band)))
1422 continue;
1423 kfree(local->hw.wiphy->bands[band]);
1424 }
1425
1426 wiphy_free(local->hw.wiphy);
1427}
1428EXPORT_SYMBOL(ieee80211_free_hw);
1429
1430static int __init ieee80211_init(void)
1431{
1432 struct sk_buff *skb;
1433 int ret;
1434
1435 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1436 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1437 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1438
1439 ret = rc80211_minstrel_init();
1440 if (ret)
1441 return ret;
1442
1443 ret = ieee80211_iface_init();
1444 if (ret)
1445 goto err_netdev;
1446
1447 return 0;
1448 err_netdev:
1449 rc80211_minstrel_exit();
1450
1451 return ret;
1452}
1453
1454static void __exit ieee80211_exit(void)
1455{
1456 rc80211_minstrel_exit();
1457
1458 ieee80211s_stop();
1459
1460 ieee80211_iface_exit();
1461
1462 rcu_barrier();
1463}
1464
1465
1466subsys_initcall(ieee80211_init);
1467module_exit(ieee80211_exit);
1468
1469MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1470MODULE_LICENSE("GPL");
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
36void 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
83static 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
91static 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 power = min(power, sdata->vif.bss_conf.txpower);
150 }
151 rcu_read_unlock();
152
153 if (local->hw.conf.power_level != power) {
154 changed |= IEEE80211_CONF_CHANGE_POWER;
155 local->hw.conf.power_level = power;
156 }
157
158 return changed;
159}
160
161int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
162{
163 int ret = 0;
164
165 might_sleep();
166
167 if (!local->use_chanctx)
168 changed |= ieee80211_hw_conf_chan(local);
169 else
170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
171 IEEE80211_CONF_CHANGE_POWER);
172
173 if (changed && local->open_count) {
174 ret = drv_config(local, changed);
175 /*
176 * Goal:
177 * HW reconfiguration should never fail, the driver has told
178 * us what it can support so it should live up to that promise.
179 *
180 * Current status:
181 * rfkill is not integrated with mac80211 and a
182 * configuration command can thus fail if hardware rfkill
183 * is enabled
184 *
185 * FIXME: integrate rfkill with mac80211 and then add this
186 * WARN_ON() back
187 *
188 */
189 /* WARN_ON(ret); */
190 }
191
192 return ret;
193}
194
195void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
196 u32 changed)
197{
198 struct ieee80211_local *local = sdata->local;
199
200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
201 return;
202
203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
204}
205
206u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
207{
208 sdata->vif.bss_conf.use_cts_prot = false;
209 sdata->vif.bss_conf.use_short_preamble = false;
210 sdata->vif.bss_conf.use_short_slot = false;
211 return BSS_CHANGED_ERP_CTS_PROT |
212 BSS_CHANGED_ERP_PREAMBLE |
213 BSS_CHANGED_ERP_SLOT;
214}
215
216static void ieee80211_tasklet_handler(unsigned long data)
217{
218 struct ieee80211_local *local = (struct ieee80211_local *) data;
219 struct sk_buff *skb;
220
221 while ((skb = skb_dequeue(&local->skb_queue)) ||
222 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
223 switch (skb->pkt_type) {
224 case IEEE80211_RX_MSG:
225 /* Clear skb->pkt_type in order to not confuse kernel
226 * netstack. */
227 skb->pkt_type = 0;
228 ieee80211_rx(&local->hw, skb);
229 break;
230 case IEEE80211_TX_STATUS_MSG:
231 skb->pkt_type = 0;
232 ieee80211_tx_status(&local->hw, skb);
233 break;
234 default:
235 WARN(1, "mac80211: Packet is of unknown type %d\n",
236 skb->pkt_type);
237 dev_kfree_skb(skb);
238 break;
239 }
240 }
241}
242
243static void ieee80211_restart_work(struct work_struct *work)
244{
245 struct ieee80211_local *local =
246 container_of(work, struct ieee80211_local, restart_work);
247 struct ieee80211_sub_if_data *sdata;
248
249 /* wait for scan work complete */
250 flush_workqueue(local->workqueue);
251 flush_work(&local->sched_scan_stopped_work);
252
253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
254 "%s called with hardware scan in progress\n", __func__);
255
256 flush_work(&local->radar_detected_work);
257 rtnl_lock();
258 list_for_each_entry(sdata, &local->interfaces, list) {
259 /*
260 * XXX: there may be more work for other vif types and even
261 * for station mode: a good thing would be to run most of
262 * the iface type's dependent _stop (ieee80211_mg_stop,
263 * ieee80211_ibss_stop) etc...
264 * For now, fix only the specific bug that was seen: race
265 * between csa_connection_drop_work and us.
266 */
267 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
268 /*
269 * This worker is scheduled from the iface worker that
270 * runs on mac80211's workqueue, so we can't be
271 * scheduling this worker after the cancel right here.
272 * The exception is ieee80211_chswitch_done.
273 * Then we can have a race...
274 */
275 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
276 }
277 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
278 }
279 ieee80211_scan_cancel(local);
280
281 /* make sure any new ROC will consider local->in_reconfig */
282 flush_delayed_work(&local->roc_work);
283 flush_work(&local->hw_roc_done);
284
285 /* wait for all packet processing to be done */
286 synchronize_net();
287
288 ieee80211_reconfig(local);
289 rtnl_unlock();
290}
291
292void ieee80211_restart_hw(struct ieee80211_hw *hw)
293{
294 struct ieee80211_local *local = hw_to_local(hw);
295
296 trace_api_restart_hw(local);
297
298 wiphy_info(hw->wiphy,
299 "Hardware restart was requested\n");
300
301 /* use this reason, ieee80211_reconfig will unblock it */
302 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
303 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
304 false);
305
306 /*
307 * Stop all Rx during the reconfig. We don't want state changes
308 * or driver callbacks while this is in progress.
309 */
310 local->in_reconfig = true;
311 barrier();
312
313 queue_work(system_freezable_wq, &local->restart_work);
314}
315EXPORT_SYMBOL(ieee80211_restart_hw);
316
317#ifdef CONFIG_INET
318static int ieee80211_ifa_changed(struct notifier_block *nb,
319 unsigned long data, void *arg)
320{
321 struct in_ifaddr *ifa = arg;
322 struct ieee80211_local *local =
323 container_of(nb, struct ieee80211_local,
324 ifa_notifier);
325 struct net_device *ndev = ifa->ifa_dev->dev;
326 struct wireless_dev *wdev = ndev->ieee80211_ptr;
327 struct in_device *idev;
328 struct ieee80211_sub_if_data *sdata;
329 struct ieee80211_bss_conf *bss_conf;
330 struct ieee80211_if_managed *ifmgd;
331 int c = 0;
332
333 /* Make sure it's our interface that got changed */
334 if (!wdev)
335 return NOTIFY_DONE;
336
337 if (wdev->wiphy != local->hw.wiphy)
338 return NOTIFY_DONE;
339
340 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
341 bss_conf = &sdata->vif.bss_conf;
342
343 /* ARP filtering is only supported in managed mode */
344 if (sdata->vif.type != NL80211_IFTYPE_STATION)
345 return NOTIFY_DONE;
346
347 idev = __in_dev_get_rtnl(sdata->dev);
348 if (!idev)
349 return NOTIFY_DONE;
350
351 ifmgd = &sdata->u.mgd;
352 sdata_lock(sdata);
353
354 /* Copy the addresses to the bss_conf list */
355 ifa = rtnl_dereference(idev->ifa_list);
356 while (ifa) {
357 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
358 bss_conf->arp_addr_list[c] = ifa->ifa_address;
359 ifa = rtnl_dereference(ifa->ifa_next);
360 c++;
361 }
362
363 bss_conf->arp_addr_cnt = c;
364
365 /* Configure driver only if associated (which also implies it is up) */
366 if (ifmgd->associated)
367 ieee80211_bss_info_change_notify(sdata,
368 BSS_CHANGED_ARP_FILTER);
369
370 sdata_unlock(sdata);
371
372 return NOTIFY_OK;
373}
374#endif
375
376#if IS_ENABLED(CONFIG_IPV6)
377static int ieee80211_ifa6_changed(struct notifier_block *nb,
378 unsigned long data, void *arg)
379{
380 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
381 struct inet6_dev *idev = ifa->idev;
382 struct net_device *ndev = ifa->idev->dev;
383 struct ieee80211_local *local =
384 container_of(nb, struct ieee80211_local, ifa6_notifier);
385 struct wireless_dev *wdev = ndev->ieee80211_ptr;
386 struct ieee80211_sub_if_data *sdata;
387
388 /* Make sure it's our interface that got changed */
389 if (!wdev || wdev->wiphy != local->hw.wiphy)
390 return NOTIFY_DONE;
391
392 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
393
394 /*
395 * For now only support station mode. This is mostly because
396 * doing AP would have to handle AP_VLAN in some way ...
397 */
398 if (sdata->vif.type != NL80211_IFTYPE_STATION)
399 return NOTIFY_DONE;
400
401 drv_ipv6_addr_change(local, sdata, idev);
402
403 return NOTIFY_OK;
404}
405#endif
406
407/* There isn't a lot of sense in it, but you can transmit anything you like */
408static const struct ieee80211_txrx_stypes
409ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
410 [NL80211_IFTYPE_ADHOC] = {
411 .tx = 0xffff,
412 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
413 BIT(IEEE80211_STYPE_AUTH >> 4) |
414 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
415 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
416 },
417 [NL80211_IFTYPE_STATION] = {
418 .tx = 0xffff,
419 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
420 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
421 },
422 [NL80211_IFTYPE_AP] = {
423 .tx = 0xffff,
424 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
425 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
426 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
427 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
428 BIT(IEEE80211_STYPE_AUTH >> 4) |
429 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
430 BIT(IEEE80211_STYPE_ACTION >> 4),
431 },
432 [NL80211_IFTYPE_AP_VLAN] = {
433 /* copy AP */
434 .tx = 0xffff,
435 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
436 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
437 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
438 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
439 BIT(IEEE80211_STYPE_AUTH >> 4) |
440 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
441 BIT(IEEE80211_STYPE_ACTION >> 4),
442 },
443 [NL80211_IFTYPE_P2P_CLIENT] = {
444 .tx = 0xffff,
445 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
447 },
448 [NL80211_IFTYPE_P2P_GO] = {
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_MESH_POINT] = {
459 .tx = 0xffff,
460 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
461 BIT(IEEE80211_STYPE_AUTH >> 4) |
462 BIT(IEEE80211_STYPE_DEAUTH >> 4),
463 },
464 [NL80211_IFTYPE_P2P_DEVICE] = {
465 .tx = 0xffff,
466 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
467 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
468 },
469};
470
471static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
472 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
473 IEEE80211_HT_AMPDU_PARM_DENSITY,
474
475 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
476 IEEE80211_HT_CAP_MAX_AMSDU |
477 IEEE80211_HT_CAP_SGI_20 |
478 IEEE80211_HT_CAP_SGI_40 |
479 IEEE80211_HT_CAP_TX_STBC |
480 IEEE80211_HT_CAP_RX_STBC |
481 IEEE80211_HT_CAP_LDPC_CODING |
482 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
483 .mcs = {
484 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
485 0xff, 0xff, 0xff, 0xff, 0xff, },
486 },
487};
488
489static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
490 .vht_cap_info =
491 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
492 IEEE80211_VHT_CAP_SHORT_GI_80 |
493 IEEE80211_VHT_CAP_SHORT_GI_160 |
494 IEEE80211_VHT_CAP_RXSTBC_MASK |
495 IEEE80211_VHT_CAP_TXSTBC |
496 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
497 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
498 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
499 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
500 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
501 .supp_mcs = {
502 .rx_mcs_map = cpu_to_le16(~0),
503 .tx_mcs_map = cpu_to_le16(~0),
504 },
505};
506
507struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
508 const struct ieee80211_ops *ops,
509 const char *requested_name)
510{
511 struct ieee80211_local *local;
512 int priv_size, i;
513 struct wiphy *wiphy;
514 bool use_chanctx;
515
516 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
517 !ops->add_interface || !ops->remove_interface ||
518 !ops->configure_filter))
519 return NULL;
520
521 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
522 return NULL;
523
524 /* check all or no channel context operations exist */
525 i = !!ops->add_chanctx + !!ops->remove_chanctx +
526 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
527 !!ops->unassign_vif_chanctx;
528 if (WARN_ON(i != 0 && i != 5))
529 return NULL;
530 use_chanctx = i == 5;
531
532 /* Ensure 32-byte alignment of our private data and hw private data.
533 * We use the wiphy priv data for both our ieee80211_local and for
534 * the driver's private data
535 *
536 * In memory it'll be like this:
537 *
538 * +-------------------------+
539 * | struct wiphy |
540 * +-------------------------+
541 * | struct ieee80211_local |
542 * +-------------------------+
543 * | driver's private data |
544 * +-------------------------+
545 *
546 */
547 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
548
549 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
550
551 if (!wiphy)
552 return NULL;
553
554 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
555
556 wiphy->privid = mac80211_wiphy_privid;
557
558 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
559 WIPHY_FLAG_4ADDR_AP |
560 WIPHY_FLAG_4ADDR_STATION |
561 WIPHY_FLAG_REPORTS_OBSS |
562 WIPHY_FLAG_OFFCHAN_TX;
563
564 if (ops->remain_on_channel)
565 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
566
567 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
568 NL80211_FEATURE_SAE |
569 NL80211_FEATURE_HT_IBSS |
570 NL80211_FEATURE_VIF_TXPOWER |
571 NL80211_FEATURE_MAC_ON_CREATE |
572 NL80211_FEATURE_USERSPACE_MPM |
573 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
574 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
575 wiphy_ext_feature_set(wiphy,
576 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
577
578 if (!ops->hw_scan) {
579 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
580 NL80211_FEATURE_AP_SCAN;
581 /*
582 * if the driver behaves correctly using the probe request
583 * (template) from mac80211, then both of these should be
584 * supported even with hw scan - but let drivers opt in.
585 */
586 wiphy_ext_feature_set(wiphy,
587 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
588 wiphy_ext_feature_set(wiphy,
589 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
590 }
591
592 if (!ops->set_key)
593 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
594
595 if (ops->wake_tx_queue)
596 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
597
598 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
599
600 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
601
602 local = wiphy_priv(wiphy);
603
604 if (sta_info_init(local))
605 goto err_free;
606
607 local->hw.wiphy = wiphy;
608
609 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
610
611 local->ops = ops;
612 local->use_chanctx = use_chanctx;
613
614 /*
615 * We need a bit of data queued to build aggregates properly, so
616 * instruct the TCP stack to allow more than a single ms of data
617 * to be queued in the stack. The value is a bit-shift of 1
618 * second, so 7 is ~8ms of queued data. Only affects local TCP
619 * sockets.
620 * This is the default, anyhow - drivers may need to override it
621 * for local reasons (longer buffers, longer completion time, or
622 * similar).
623 */
624 local->hw.tx_sk_pacing_shift = 7;
625
626 /* set up some defaults */
627 local->hw.queues = 1;
628 local->hw.max_rates = 1;
629 local->hw.max_report_rates = 0;
630 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
631 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
632 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
633 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
634 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
635 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
636 IEEE80211_RADIOTAP_MCS_HAVE_GI |
637 IEEE80211_RADIOTAP_MCS_HAVE_BW;
638 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
639 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
640 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
641 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
642 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
643 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
644 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
645 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
646
647 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
648
649 wiphy->extended_capabilities = local->ext_capa;
650 wiphy->extended_capabilities_mask = local->ext_capa;
651 wiphy->extended_capabilities_len =
652 ARRAY_SIZE(local->ext_capa);
653
654 INIT_LIST_HEAD(&local->interfaces);
655 INIT_LIST_HEAD(&local->mon_list);
656
657 __hw_addr_init(&local->mc_list);
658
659 mutex_init(&local->iflist_mtx);
660 mutex_init(&local->mtx);
661
662 mutex_init(&local->key_mtx);
663 spin_lock_init(&local->filter_lock);
664 spin_lock_init(&local->rx_path_lock);
665 spin_lock_init(&local->queue_stop_reason_lock);
666
667 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
668 INIT_LIST_HEAD(&local->active_txqs[i]);
669 spin_lock_init(&local->active_txq_lock[i]);
670 }
671 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
672
673 INIT_LIST_HEAD(&local->chanctx_list);
674 mutex_init(&local->chanctx_mtx);
675
676 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
677
678 INIT_WORK(&local->restart_work, ieee80211_restart_work);
679
680 INIT_WORK(&local->radar_detected_work,
681 ieee80211_dfs_radar_detected_work);
682
683 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
684 local->smps_mode = IEEE80211_SMPS_OFF;
685
686 INIT_WORK(&local->dynamic_ps_enable_work,
687 ieee80211_dynamic_ps_enable_work);
688 INIT_WORK(&local->dynamic_ps_disable_work,
689 ieee80211_dynamic_ps_disable_work);
690 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
691
692 INIT_WORK(&local->sched_scan_stopped_work,
693 ieee80211_sched_scan_stopped_work);
694
695 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
696
697 spin_lock_init(&local->ack_status_lock);
698 idr_init(&local->ack_status_frames);
699
700 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
701 skb_queue_head_init(&local->pending[i]);
702 atomic_set(&local->agg_queue_stop[i], 0);
703 }
704 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
705 (unsigned long)local);
706
707 if (ops->wake_tx_queue)
708 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
709 (unsigned long)local);
710
711 tasklet_init(&local->tasklet,
712 ieee80211_tasklet_handler,
713 (unsigned long) local);
714
715 skb_queue_head_init(&local->skb_queue);
716 skb_queue_head_init(&local->skb_queue_unreliable);
717 skb_queue_head_init(&local->skb_queue_tdls_chsw);
718
719 ieee80211_alloc_led_names(local);
720
721 ieee80211_roc_setup(local);
722
723 local->hw.radiotap_timestamp.units_pos = -1;
724 local->hw.radiotap_timestamp.accuracy = -1;
725
726 return &local->hw;
727 err_free:
728 wiphy_free(wiphy);
729 return NULL;
730}
731EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
732
733static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
734{
735 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
736 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
737 int n_suites = 0, r = 0, w = 0;
738 u32 *suites;
739 static const u32 cipher_suites[] = {
740 /* keep WEP first, it may be removed below */
741 WLAN_CIPHER_SUITE_WEP40,
742 WLAN_CIPHER_SUITE_WEP104,
743 WLAN_CIPHER_SUITE_TKIP,
744 WLAN_CIPHER_SUITE_CCMP,
745 WLAN_CIPHER_SUITE_CCMP_256,
746 WLAN_CIPHER_SUITE_GCMP,
747 WLAN_CIPHER_SUITE_GCMP_256,
748
749 /* keep last -- depends on hw flags! */
750 WLAN_CIPHER_SUITE_AES_CMAC,
751 WLAN_CIPHER_SUITE_BIP_CMAC_256,
752 WLAN_CIPHER_SUITE_BIP_GMAC_128,
753 WLAN_CIPHER_SUITE_BIP_GMAC_256,
754 };
755
756 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
757 local->hw.wiphy->cipher_suites) {
758 /* If the driver advertises, or doesn't support SW crypto,
759 * we only need to remove WEP if necessary.
760 */
761 if (have_wep)
762 return 0;
763
764 /* well if it has _no_ ciphers ... fine */
765 if (!local->hw.wiphy->n_cipher_suites)
766 return 0;
767
768 /* Driver provides cipher suites, but we need to exclude WEP */
769 suites = kmemdup(local->hw.wiphy->cipher_suites,
770 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
771 GFP_KERNEL);
772 if (!suites)
773 return -ENOMEM;
774
775 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
776 u32 suite = local->hw.wiphy->cipher_suites[r];
777
778 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
779 suite == WLAN_CIPHER_SUITE_WEP104)
780 continue;
781 suites[w++] = suite;
782 }
783 } else if (!local->hw.cipher_schemes) {
784 /* If the driver doesn't have cipher schemes, there's nothing
785 * else to do other than assign the (software supported and
786 * perhaps offloaded) cipher suites.
787 */
788 local->hw.wiphy->cipher_suites = cipher_suites;
789 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
790
791 if (!have_mfp)
792 local->hw.wiphy->n_cipher_suites -= 4;
793
794 if (!have_wep) {
795 local->hw.wiphy->cipher_suites += 2;
796 local->hw.wiphy->n_cipher_suites -= 2;
797 }
798
799 /* not dynamically allocated, so just return */
800 return 0;
801 } else {
802 const struct ieee80211_cipher_scheme *cs;
803
804 cs = local->hw.cipher_schemes;
805
806 /* Driver specifies cipher schemes only (but not cipher suites
807 * including the schemes)
808 *
809 * We start counting ciphers defined by schemes, TKIP, CCMP,
810 * CCMP-256, GCMP, and GCMP-256
811 */
812 n_suites = local->hw.n_cipher_schemes + 5;
813
814 /* check if we have WEP40 and WEP104 */
815 if (have_wep)
816 n_suites += 2;
817
818 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
819 * BIP-GMAC-256
820 */
821 if (have_mfp)
822 n_suites += 4;
823
824 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
825 if (!suites)
826 return -ENOMEM;
827
828 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
829 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
830 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
831 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
832 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
833
834 if (have_wep) {
835 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
836 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
837 }
838
839 if (have_mfp) {
840 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
841 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
842 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
843 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
844 }
845
846 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
847 suites[w++] = cs[r].cipher;
848 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
849 kfree(suites);
850 return -EINVAL;
851 }
852 }
853 }
854
855 local->hw.wiphy->cipher_suites = suites;
856 local->hw.wiphy->n_cipher_suites = w;
857 local->wiphy_ciphers_allocated = true;
858
859 return 0;
860}
861
862int ieee80211_register_hw(struct ieee80211_hw *hw)
863{
864 struct ieee80211_local *local = hw_to_local(hw);
865 int result, i;
866 enum nl80211_band band;
867 int channels, max_bitrates;
868 bool supp_ht, supp_vht, supp_he;
869 netdev_features_t feature_whitelist;
870 struct cfg80211_chan_def dflt_chandef = {};
871
872 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
873 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
874 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
875 return -EINVAL;
876
877 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
878 (!local->ops->tdls_channel_switch ||
879 !local->ops->tdls_cancel_channel_switch ||
880 !local->ops->tdls_recv_channel_switch))
881 return -EOPNOTSUPP;
882
883 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
884 !local->ops->set_frag_threshold))
885 return -EINVAL;
886
887 if (WARN_ON(local->hw.wiphy->interface_modes &
888 BIT(NL80211_IFTYPE_NAN) &&
889 (!local->ops->start_nan || !local->ops->stop_nan)))
890 return -EINVAL;
891
892#ifdef CONFIG_PM
893 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
894 return -EINVAL;
895#endif
896
897 if (!local->use_chanctx) {
898 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
899 const struct ieee80211_iface_combination *comb;
900
901 comb = &local->hw.wiphy->iface_combinations[i];
902
903 if (comb->num_different_channels > 1)
904 return -EINVAL;
905 }
906 } else {
907 /*
908 * WDS is currently prohibited when channel contexts are used
909 * because there's no clear definition of which channel WDS
910 * type interfaces use
911 */
912 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
913 return -EINVAL;
914
915 /* DFS is not supported with multi-channel combinations yet */
916 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
917 const struct ieee80211_iface_combination *comb;
918
919 comb = &local->hw.wiphy->iface_combinations[i];
920
921 if (comb->radar_detect_widths &&
922 comb->num_different_channels > 1)
923 return -EINVAL;
924 }
925 }
926
927 /* Only HW csum features are currently compatible with mac80211 */
928 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
929 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
930 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
931 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
932 return -EINVAL;
933
934 if (hw->max_report_rates == 0)
935 hw->max_report_rates = hw->max_rates;
936
937 local->rx_chains = 1;
938
939 /*
940 * generic code guarantees at least one band,
941 * set this very early because much code assumes
942 * that hw.conf.channel is assigned
943 */
944 channels = 0;
945 max_bitrates = 0;
946 supp_ht = false;
947 supp_vht = false;
948 supp_he = false;
949 for (band = 0; band < NUM_NL80211_BANDS; band++) {
950 struct ieee80211_supported_band *sband;
951
952 sband = local->hw.wiphy->bands[band];
953 if (!sband)
954 continue;
955
956 if (!dflt_chandef.chan) {
957 cfg80211_chandef_create(&dflt_chandef,
958 &sband->channels[0],
959 NL80211_CHAN_NO_HT);
960 /* init channel we're on */
961 if (!local->use_chanctx && !local->_oper_chandef.chan) {
962 local->hw.conf.chandef = dflt_chandef;
963 local->_oper_chandef = dflt_chandef;
964 }
965 local->monitor_chandef = dflt_chandef;
966 }
967
968 channels += sband->n_channels;
969
970 if (max_bitrates < sband->n_bitrates)
971 max_bitrates = sband->n_bitrates;
972 supp_ht = supp_ht || sband->ht_cap.ht_supported;
973 supp_vht = supp_vht || sband->vht_cap.vht_supported;
974
975 if (!supp_he)
976 supp_he = !!ieee80211_get_he_sta_cap(sband);
977
978 if (!sband->ht_cap.ht_supported)
979 continue;
980
981 /* TODO: consider VHT for RX chains, hopefully it's the same */
982 local->rx_chains =
983 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
984 local->rx_chains);
985
986 /* no need to mask, SM_PS_DISABLED has all bits set */
987 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
988 IEEE80211_HT_CAP_SM_PS_SHIFT;
989 }
990
991 /* if low-level driver supports AP, we also support VLAN.
992 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
993 * based on their support to transmit SW encrypted packets.
994 */
995 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
996 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
997 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
998 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
999 }
1000
1001 /* mac80211 always supports monitor */
1002 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1003 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1004
1005 /* mac80211 doesn't support more than one IBSS interface right now */
1006 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1007 const struct ieee80211_iface_combination *c;
1008 int j;
1009
1010 c = &hw->wiphy->iface_combinations[i];
1011
1012 for (j = 0; j < c->n_limits; j++)
1013 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1014 c->limits[j].max > 1)
1015 return -EINVAL;
1016 }
1017
1018 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1019 sizeof(void *) * channels, GFP_KERNEL);
1020 if (!local->int_scan_req)
1021 return -ENOMEM;
1022
1023 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1024 if (!local->hw.wiphy->bands[band])
1025 continue;
1026 local->int_scan_req->rates[band] = (u32) -1;
1027 }
1028
1029#ifndef CONFIG_MAC80211_MESH
1030 /* mesh depends on Kconfig, but drivers should set it if they want */
1031 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1032#endif
1033
1034 /* if the underlying driver supports mesh, mac80211 will (at least)
1035 * provide routing of mesh authentication frames to userspace */
1036 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1037 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1038
1039 /* mac80211 supports control port protocol changing */
1040 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1041
1042 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1043 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1044 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1045 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1046 if (hw->max_signal <= 0) {
1047 result = -EINVAL;
1048 goto fail_wiphy_register;
1049 }
1050 }
1051
1052 /* Mac80211 and therefore all drivers using SW crypto only
1053 * are able to handle PTK rekeys and Extended Key ID.
1054 */
1055 if (!local->ops->set_key) {
1056 wiphy_ext_feature_set(local->hw.wiphy,
1057 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1058 wiphy_ext_feature_set(local->hw.wiphy,
1059 NL80211_EXT_FEATURE_EXT_KEY_ID);
1060 }
1061
1062 /*
1063 * Calculate scan IE length -- we need this to alloc
1064 * memory and to subtract from the driver limit. It
1065 * includes the DS Params, (extended) supported rates, and HT
1066 * information -- SSID is the driver's responsibility.
1067 */
1068 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1069 3 /* DS Params */;
1070 if (supp_ht)
1071 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1072
1073 if (supp_vht)
1074 local->scan_ies_len +=
1075 2 + sizeof(struct ieee80211_vht_cap);
1076
1077 /* HE cap element is variable in size - set len to allow max size */
1078 /*
1079 * TODO: 1 is added at the end of the calculation to accommodate for
1080 * the temporary placing of the HE capabilities IE under EXT.
1081 * Remove it once it is placed in the final place.
1082 */
1083 if (supp_he)
1084 local->scan_ies_len +=
1085 2 + sizeof(struct ieee80211_he_cap_elem) +
1086 sizeof(struct ieee80211_he_mcs_nss_supp) +
1087 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1088
1089 if (!local->ops->hw_scan) {
1090 /* For hw_scan, driver needs to set these up. */
1091 local->hw.wiphy->max_scan_ssids = 4;
1092 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1093 }
1094
1095 /*
1096 * If the driver supports any scan IEs, then assume the
1097 * limit includes the IEs mac80211 will add, otherwise
1098 * leave it at zero and let the driver sort it out; we
1099 * still pass our IEs to the driver but userspace will
1100 * not be allowed to in that case.
1101 */
1102 if (local->hw.wiphy->max_scan_ie_len)
1103 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1104
1105 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1106 local->hw.n_cipher_schemes));
1107
1108 result = ieee80211_init_cipher_suites(local);
1109 if (result < 0)
1110 goto fail_wiphy_register;
1111
1112 if (!local->ops->remain_on_channel)
1113 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1114
1115 /* mac80211 based drivers don't support internal TDLS setup */
1116 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1117 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1118
1119 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1120 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1121 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1122
1123 /* mac80211 supports multi BSSID, if the driver supports it */
1124 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1125 local->hw.wiphy->support_mbssid = true;
1126 if (ieee80211_hw_check(&local->hw,
1127 SUPPORTS_ONLY_HE_MULTI_BSSID))
1128 local->hw.wiphy->support_only_he_mbssid = true;
1129 else
1130 local->ext_capa[2] |=
1131 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1132 }
1133
1134 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1135
1136 result = wiphy_register(local->hw.wiphy);
1137 if (result < 0)
1138 goto fail_wiphy_register;
1139
1140 /*
1141 * We use the number of queues for feature tests (QoS, HT) internally
1142 * so restrict them appropriately.
1143 */
1144 if (hw->queues > IEEE80211_MAX_QUEUES)
1145 hw->queues = IEEE80211_MAX_QUEUES;
1146
1147 local->workqueue =
1148 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1149 if (!local->workqueue) {
1150 result = -ENOMEM;
1151 goto fail_workqueue;
1152 }
1153
1154 /*
1155 * The hardware needs headroom for sending the frame,
1156 * and we need some headroom for passing the frame to monitor
1157 * interfaces, but never both at the same time.
1158 */
1159 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1160 IEEE80211_TX_STATUS_HEADROOM);
1161
1162 debugfs_hw_add(local);
1163
1164 /*
1165 * if the driver doesn't specify a max listen interval we
1166 * use 5 which should be a safe default
1167 */
1168 if (local->hw.max_listen_interval == 0)
1169 local->hw.max_listen_interval = 5;
1170
1171 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1172
1173 local->dynamic_ps_forced_timeout = -1;
1174
1175 if (!local->hw.max_nan_de_entries)
1176 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1177
1178 if (!local->hw.weight_multiplier)
1179 local->hw.weight_multiplier = 1;
1180
1181 result = ieee80211_wep_init(local);
1182 if (result < 0)
1183 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1184 result);
1185
1186 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1187
1188 ieee80211_led_init(local);
1189
1190 result = ieee80211_txq_setup_flows(local);
1191 if (result)
1192 goto fail_flows;
1193
1194 rtnl_lock();
1195
1196 result = ieee80211_init_rate_ctrl_alg(local,
1197 hw->rate_control_algorithm);
1198 if (result < 0) {
1199 wiphy_debug(local->hw.wiphy,
1200 "Failed to initialize rate control algorithm\n");
1201 goto fail_rate;
1202 }
1203
1204 if (local->rate_ctrl) {
1205 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1206 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1207 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1208 }
1209
1210 /*
1211 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1212 * or have it when we don't, copy the sband structure and set/clear it.
1213 * This is necessary because rate scaling algorithms could be switched
1214 * and have different support values.
1215 * Print a message so that in the common case the reallocation can be
1216 * avoided.
1217 */
1218 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1219 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1220 struct ieee80211_supported_band *sband;
1221 bool local_cap, ie_cap;
1222
1223 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1224
1225 sband = local->hw.wiphy->bands[band];
1226 if (!sband || !sband->vht_cap.vht_supported)
1227 continue;
1228
1229 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1230 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1231
1232 if (local_cap == ie_cap)
1233 continue;
1234
1235 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1236 if (!sband) {
1237 result = -ENOMEM;
1238 goto fail_rate;
1239 }
1240
1241 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1242 band);
1243
1244 sband->vht_cap.vht_mcs.tx_highest ^=
1245 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1246
1247 local->hw.wiphy->bands[band] = sband;
1248 local->sband_allocated |= BIT(band);
1249 }
1250
1251 /* add one default STA interface if supported */
1252 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1253 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1254 struct vif_params params = {0};
1255
1256 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1257 NL80211_IFTYPE_STATION, ¶ms);
1258 if (result)
1259 wiphy_warn(local->hw.wiphy,
1260 "Failed to add default virtual iface\n");
1261 }
1262
1263 rtnl_unlock();
1264
1265#ifdef CONFIG_INET
1266 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1267 result = register_inetaddr_notifier(&local->ifa_notifier);
1268 if (result)
1269 goto fail_ifa;
1270#endif
1271
1272#if IS_ENABLED(CONFIG_IPV6)
1273 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1274 result = register_inet6addr_notifier(&local->ifa6_notifier);
1275 if (result)
1276 goto fail_ifa6;
1277#endif
1278
1279 return 0;
1280
1281#if IS_ENABLED(CONFIG_IPV6)
1282 fail_ifa6:
1283#ifdef CONFIG_INET
1284 unregister_inetaddr_notifier(&local->ifa_notifier);
1285#endif
1286#endif
1287#if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1288 fail_ifa:
1289#endif
1290 rtnl_lock();
1291 rate_control_deinitialize(local);
1292 ieee80211_remove_interfaces(local);
1293 fail_rate:
1294 rtnl_unlock();
1295 fail_flows:
1296 ieee80211_led_exit(local);
1297 destroy_workqueue(local->workqueue);
1298 fail_workqueue:
1299 wiphy_unregister(local->hw.wiphy);
1300 fail_wiphy_register:
1301 if (local->wiphy_ciphers_allocated)
1302 kfree(local->hw.wiphy->cipher_suites);
1303 kfree(local->int_scan_req);
1304 return result;
1305}
1306EXPORT_SYMBOL(ieee80211_register_hw);
1307
1308void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1309{
1310 struct ieee80211_local *local = hw_to_local(hw);
1311
1312 tasklet_kill(&local->tx_pending_tasklet);
1313 tasklet_kill(&local->tasklet);
1314
1315#ifdef CONFIG_INET
1316 unregister_inetaddr_notifier(&local->ifa_notifier);
1317#endif
1318#if IS_ENABLED(CONFIG_IPV6)
1319 unregister_inet6addr_notifier(&local->ifa6_notifier);
1320#endif
1321
1322 rtnl_lock();
1323
1324 /*
1325 * At this point, interface list manipulations are fine
1326 * because the driver cannot be handing us frames any
1327 * more and the tasklet is killed.
1328 */
1329 ieee80211_remove_interfaces(local);
1330
1331 rtnl_unlock();
1332
1333 cancel_delayed_work_sync(&local->roc_work);
1334 cancel_work_sync(&local->restart_work);
1335 cancel_work_sync(&local->reconfig_filter);
1336 cancel_work_sync(&local->tdls_chsw_work);
1337 flush_work(&local->sched_scan_stopped_work);
1338 flush_work(&local->radar_detected_work);
1339
1340 ieee80211_clear_tx_pending(local);
1341 rate_control_deinitialize(local);
1342
1343 if (skb_queue_len(&local->skb_queue) ||
1344 skb_queue_len(&local->skb_queue_unreliable))
1345 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1346 skb_queue_purge(&local->skb_queue);
1347 skb_queue_purge(&local->skb_queue_unreliable);
1348 skb_queue_purge(&local->skb_queue_tdls_chsw);
1349
1350 destroy_workqueue(local->workqueue);
1351 wiphy_unregister(local->hw.wiphy);
1352 ieee80211_led_exit(local);
1353 kfree(local->int_scan_req);
1354}
1355EXPORT_SYMBOL(ieee80211_unregister_hw);
1356
1357static int ieee80211_free_ack_frame(int id, void *p, void *data)
1358{
1359 WARN_ONCE(1, "Have pending ack frames!\n");
1360 kfree_skb(p);
1361 return 0;
1362}
1363
1364void ieee80211_free_hw(struct ieee80211_hw *hw)
1365{
1366 struct ieee80211_local *local = hw_to_local(hw);
1367 enum nl80211_band band;
1368
1369 mutex_destroy(&local->iflist_mtx);
1370 mutex_destroy(&local->mtx);
1371
1372 if (local->wiphy_ciphers_allocated)
1373 kfree(local->hw.wiphy->cipher_suites);
1374
1375 idr_for_each(&local->ack_status_frames,
1376 ieee80211_free_ack_frame, NULL);
1377 idr_destroy(&local->ack_status_frames);
1378
1379 sta_info_stop(local);
1380
1381 ieee80211_free_led_names(local);
1382
1383 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1384 if (!(local->sband_allocated & BIT(band)))
1385 continue;
1386 kfree(local->hw.wiphy->bands[band]);
1387 }
1388
1389 wiphy_free(local->hw.wiphy);
1390}
1391EXPORT_SYMBOL(ieee80211_free_hw);
1392
1393static int __init ieee80211_init(void)
1394{
1395 struct sk_buff *skb;
1396 int ret;
1397
1398 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1399 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1400 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1401
1402 ret = rc80211_minstrel_init();
1403 if (ret)
1404 return ret;
1405
1406 ret = ieee80211_iface_init();
1407 if (ret)
1408 goto err_netdev;
1409
1410 return 0;
1411 err_netdev:
1412 rc80211_minstrel_exit();
1413
1414 return ret;
1415}
1416
1417static void __exit ieee80211_exit(void)
1418{
1419 rc80211_minstrel_exit();
1420
1421 ieee80211s_stop();
1422
1423 ieee80211_iface_exit();
1424
1425 rcu_barrier();
1426}
1427
1428
1429subsys_initcall(ieee80211_init);
1430module_exit(ieee80211_exit);
1431
1432MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1433MODULE_LICENSE("GPL");