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
ieee80211_configure_filter(struct ieee80211_local * local)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 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
ieee80211_reconfig_filter(struct work_struct * work)86 static 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
ieee80211_hw_conf_chan(struct ieee80211_local * local)94 static 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
ieee80211_hw_config(struct ieee80211_local * local,u32 changed)168 int 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
ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data * sdata,u32 changed)202 void 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
ieee80211_reset_erp_info(struct ieee80211_sub_if_data * sdata)213 u32 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
ieee80211_tasklet_handler(unsigned long data)223 static 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
ieee80211_restart_work(struct work_struct * work)250 static 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
ieee80211_restart_hw(struct ieee80211_hw * hw)299 void 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 }
322 EXPORT_SYMBOL(ieee80211_restart_hw);
323
324 #ifdef CONFIG_INET
ieee80211_ifa_changed(struct notifier_block * nb,unsigned long data,void * arg)325 static 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)
ieee80211_ifa6_changed(struct notifier_block * nb,unsigned long data,void * arg)384 static 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 */
415 static const struct ieee80211_txrx_stypes
416 ieee80211_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
491 static 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
509 static 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
ieee80211_alloc_hw_nm(size_t priv_data_len,const struct ieee80211_ops * ops,const char * requested_name)527 struct 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 }
763 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
764
ieee80211_init_cipher_suites(struct ieee80211_local * local)765 static 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
ieee80211_register_hw(struct ieee80211_hw * hw)894 int 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 /*
986 * Assign the first enabled channel to dflt_chandef
987 * from the list of channels
988 */
989 for (i = 0; i < sband->n_channels; i++)
990 if (!(sband->channels[i].flags &
991 IEEE80211_CHAN_DISABLED))
992 break;
993 /* if none found then use the first anyway */
994 if (i == sband->n_channels)
995 i = 0;
996 cfg80211_chandef_create(&dflt_chandef,
997 &sband->channels[i],
998 NL80211_CHAN_NO_HT);
999 /* init channel we're on */
1000 if (!local->use_chanctx && !local->_oper_chandef.chan) {
1001 local->hw.conf.chandef = dflt_chandef;
1002 local->_oper_chandef = dflt_chandef;
1003 }
1004 local->monitor_chandef = dflt_chandef;
1005 }
1006
1007 channels += sband->n_channels;
1008
1009 if (max_bitrates < sband->n_bitrates)
1010 max_bitrates = sband->n_bitrates;
1011 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1012 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1013
1014 if (!supp_he)
1015 supp_he = !!ieee80211_get_he_sta_cap(sband);
1016
1017 /* HT, VHT, HE require QoS, thus >= 4 queues */
1018 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1019 (supp_ht || supp_vht || supp_he)))
1020 return -EINVAL;
1021
1022 if (!sband->ht_cap.ht_supported)
1023 continue;
1024
1025 /* TODO: consider VHT for RX chains, hopefully it's the same */
1026 local->rx_chains =
1027 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1028 local->rx_chains);
1029
1030 /* no need to mask, SM_PS_DISABLED has all bits set */
1031 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1032 IEEE80211_HT_CAP_SM_PS_SHIFT;
1033 }
1034
1035 /* if low-level driver supports AP, we also support VLAN.
1036 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1037 * based on their support to transmit SW encrypted packets.
1038 */
1039 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1040 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1041 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1042 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1043 }
1044
1045 /* mac80211 always supports monitor */
1046 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1047 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1048
1049 /* mac80211 doesn't support more than one IBSS interface right now */
1050 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1051 const struct ieee80211_iface_combination *c;
1052 int j;
1053
1054 c = &hw->wiphy->iface_combinations[i];
1055
1056 for (j = 0; j < c->n_limits; j++)
1057 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1058 c->limits[j].max > 1)
1059 return -EINVAL;
1060 }
1061
1062 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1063 sizeof(void *) * channels, GFP_KERNEL);
1064 if (!local->int_scan_req)
1065 return -ENOMEM;
1066
1067 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1068 if (!local->hw.wiphy->bands[band])
1069 continue;
1070 local->int_scan_req->rates[band] = (u32) -1;
1071 }
1072
1073 #ifndef CONFIG_MAC80211_MESH
1074 /* mesh depends on Kconfig, but drivers should set it if they want */
1075 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1076 #endif
1077
1078 /* if the underlying driver supports mesh, mac80211 will (at least)
1079 * provide routing of mesh authentication frames to userspace */
1080 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1081 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1082
1083 /* mac80211 supports control port protocol changing */
1084 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1085
1086 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1087 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1088 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1089 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1090 if (hw->max_signal <= 0) {
1091 result = -EINVAL;
1092 goto fail_workqueue;
1093 }
1094 }
1095
1096 /* Mac80211 and therefore all drivers using SW crypto only
1097 * are able to handle PTK rekeys and Extended Key ID.
1098 */
1099 if (!local->ops->set_key) {
1100 wiphy_ext_feature_set(local->hw.wiphy,
1101 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1102 wiphy_ext_feature_set(local->hw.wiphy,
1103 NL80211_EXT_FEATURE_EXT_KEY_ID);
1104 }
1105
1106 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1107 wiphy_ext_feature_set(local->hw.wiphy,
1108 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1109
1110 /*
1111 * Calculate scan IE length -- we need this to alloc
1112 * memory and to subtract from the driver limit. It
1113 * includes the DS Params, (extended) supported rates, and HT
1114 * information -- SSID is the driver's responsibility.
1115 */
1116 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1117 3 /* DS Params */;
1118 if (supp_ht)
1119 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1120
1121 if (supp_vht)
1122 local->scan_ies_len +=
1123 2 + sizeof(struct ieee80211_vht_cap);
1124
1125 /* HE cap element is variable in size - set len to allow max size */
1126 /*
1127 * TODO: 1 is added at the end of the calculation to accommodate for
1128 * the temporary placing of the HE capabilities IE under EXT.
1129 * Remove it once it is placed in the final place.
1130 */
1131 if (supp_he)
1132 local->scan_ies_len +=
1133 2 + sizeof(struct ieee80211_he_cap_elem) +
1134 sizeof(struct ieee80211_he_mcs_nss_supp) +
1135 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1136
1137 if (!local->ops->hw_scan) {
1138 /* For hw_scan, driver needs to set these up. */
1139 local->hw.wiphy->max_scan_ssids = 4;
1140 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1141 }
1142
1143 /*
1144 * If the driver supports any scan IEs, then assume the
1145 * limit includes the IEs mac80211 will add, otherwise
1146 * leave it at zero and let the driver sort it out; we
1147 * still pass our IEs to the driver but userspace will
1148 * not be allowed to in that case.
1149 */
1150 if (local->hw.wiphy->max_scan_ie_len)
1151 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1152
1153 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1154 local->hw.n_cipher_schemes))) {
1155 result = -EINVAL;
1156 goto fail_workqueue;
1157 }
1158
1159 result = ieee80211_init_cipher_suites(local);
1160 if (result < 0)
1161 goto fail_workqueue;
1162
1163 if (!local->ops->remain_on_channel)
1164 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1165
1166 /* mac80211 based drivers don't support internal TDLS setup */
1167 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1168 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1169
1170 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1171 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1172 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1173
1174 /* mac80211 supports multi BSSID, if the driver supports it */
1175 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1176 local->hw.wiphy->support_mbssid = true;
1177 if (ieee80211_hw_check(&local->hw,
1178 SUPPORTS_ONLY_HE_MULTI_BSSID))
1179 local->hw.wiphy->support_only_he_mbssid = true;
1180 else
1181 local->ext_capa[2] |=
1182 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1183 }
1184
1185 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1186
1187 /*
1188 * We use the number of queues for feature tests (QoS, HT) internally
1189 * so restrict them appropriately.
1190 */
1191 if (hw->queues > IEEE80211_MAX_QUEUES)
1192 hw->queues = IEEE80211_MAX_QUEUES;
1193
1194 local->workqueue =
1195 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1196 if (!local->workqueue) {
1197 result = -ENOMEM;
1198 goto fail_workqueue;
1199 }
1200
1201 /*
1202 * The hardware needs headroom for sending the frame,
1203 * and we need some headroom for passing the frame to monitor
1204 * interfaces, but never both at the same time.
1205 */
1206 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1207 IEEE80211_TX_STATUS_HEADROOM);
1208
1209 /*
1210 * if the driver doesn't specify a max listen interval we
1211 * use 5 which should be a safe default
1212 */
1213 if (local->hw.max_listen_interval == 0)
1214 local->hw.max_listen_interval = 5;
1215
1216 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1217
1218 local->dynamic_ps_forced_timeout = -1;
1219
1220 if (!local->hw.max_nan_de_entries)
1221 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1222
1223 if (!local->hw.weight_multiplier)
1224 local->hw.weight_multiplier = 1;
1225
1226 ieee80211_wep_init(local);
1227
1228 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1229
1230 ieee80211_led_init(local);
1231
1232 result = ieee80211_txq_setup_flows(local);
1233 if (result)
1234 goto fail_flows;
1235
1236 rtnl_lock();
1237 result = ieee80211_init_rate_ctrl_alg(local,
1238 hw->rate_control_algorithm);
1239 rtnl_unlock();
1240 if (result < 0) {
1241 wiphy_debug(local->hw.wiphy,
1242 "Failed to initialize rate control algorithm\n");
1243 goto fail_rate;
1244 }
1245
1246 if (local->rate_ctrl) {
1247 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1248 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1249 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1250 }
1251
1252 /*
1253 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1254 * or have it when we don't, copy the sband structure and set/clear it.
1255 * This is necessary because rate scaling algorithms could be switched
1256 * and have different support values.
1257 * Print a message so that in the common case the reallocation can be
1258 * avoided.
1259 */
1260 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1261 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1262 struct ieee80211_supported_band *sband;
1263 bool local_cap, ie_cap;
1264
1265 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1266
1267 sband = local->hw.wiphy->bands[band];
1268 if (!sband || !sband->vht_cap.vht_supported)
1269 continue;
1270
1271 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1272 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1273
1274 if (local_cap == ie_cap)
1275 continue;
1276
1277 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1278 if (!sband) {
1279 result = -ENOMEM;
1280 goto fail_rate;
1281 }
1282
1283 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1284 band);
1285
1286 sband->vht_cap.vht_mcs.tx_highest ^=
1287 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1288
1289 local->hw.wiphy->bands[band] = sband;
1290 local->sband_allocated |= BIT(band);
1291 }
1292
1293 result = wiphy_register(local->hw.wiphy);
1294 if (result < 0)
1295 goto fail_wiphy_register;
1296
1297 debugfs_hw_add(local);
1298 rate_control_add_debugfs(local);
1299
1300 rtnl_lock();
1301
1302 /* add one default STA interface if supported */
1303 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1304 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1305 struct vif_params params = {0};
1306
1307 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1308 NL80211_IFTYPE_STATION, ¶ms);
1309 if (result)
1310 wiphy_warn(local->hw.wiphy,
1311 "Failed to add default virtual iface\n");
1312 }
1313
1314 rtnl_unlock();
1315
1316 #ifdef CONFIG_INET
1317 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1318 result = register_inetaddr_notifier(&local->ifa_notifier);
1319 if (result)
1320 goto fail_ifa;
1321 #endif
1322
1323 #if IS_ENABLED(CONFIG_IPV6)
1324 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1325 result = register_inet6addr_notifier(&local->ifa6_notifier);
1326 if (result)
1327 goto fail_ifa6;
1328 #endif
1329
1330 return 0;
1331
1332 #if IS_ENABLED(CONFIG_IPV6)
1333 fail_ifa6:
1334 #ifdef CONFIG_INET
1335 unregister_inetaddr_notifier(&local->ifa_notifier);
1336 #endif
1337 #endif
1338 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1339 fail_ifa:
1340 #endif
1341 wiphy_unregister(local->hw.wiphy);
1342 fail_wiphy_register:
1343 rtnl_lock();
1344 rate_control_deinitialize(local);
1345 ieee80211_remove_interfaces(local);
1346 rtnl_unlock();
1347 fail_rate:
1348 fail_flows:
1349 ieee80211_led_exit(local);
1350 destroy_workqueue(local->workqueue);
1351 fail_workqueue:
1352 if (local->wiphy_ciphers_allocated)
1353 kfree(local->hw.wiphy->cipher_suites);
1354 kfree(local->int_scan_req);
1355 return result;
1356 }
1357 EXPORT_SYMBOL(ieee80211_register_hw);
1358
ieee80211_unregister_hw(struct ieee80211_hw * hw)1359 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1360 {
1361 struct ieee80211_local *local = hw_to_local(hw);
1362
1363 tasklet_kill(&local->tx_pending_tasklet);
1364 tasklet_kill(&local->tasklet);
1365
1366 #ifdef CONFIG_INET
1367 unregister_inetaddr_notifier(&local->ifa_notifier);
1368 #endif
1369 #if IS_ENABLED(CONFIG_IPV6)
1370 unregister_inet6addr_notifier(&local->ifa6_notifier);
1371 #endif
1372
1373 rtnl_lock();
1374
1375 /*
1376 * At this point, interface list manipulations are fine
1377 * because the driver cannot be handing us frames any
1378 * more and the tasklet is killed.
1379 */
1380 ieee80211_remove_interfaces(local);
1381
1382 rtnl_unlock();
1383
1384 cancel_delayed_work_sync(&local->roc_work);
1385 cancel_work_sync(&local->restart_work);
1386 cancel_work_sync(&local->reconfig_filter);
1387 cancel_work_sync(&local->tdls_chsw_work);
1388 flush_work(&local->sched_scan_stopped_work);
1389 flush_work(&local->radar_detected_work);
1390
1391 ieee80211_clear_tx_pending(local);
1392 rate_control_deinitialize(local);
1393
1394 if (skb_queue_len(&local->skb_queue) ||
1395 skb_queue_len(&local->skb_queue_unreliable))
1396 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1397 skb_queue_purge(&local->skb_queue);
1398 skb_queue_purge(&local->skb_queue_unreliable);
1399 skb_queue_purge(&local->skb_queue_tdls_chsw);
1400
1401 wiphy_unregister(local->hw.wiphy);
1402 destroy_workqueue(local->workqueue);
1403 ieee80211_led_exit(local);
1404 kfree(local->int_scan_req);
1405 }
1406 EXPORT_SYMBOL(ieee80211_unregister_hw);
1407
ieee80211_free_ack_frame(int id,void * p,void * data)1408 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1409 {
1410 WARN_ONCE(1, "Have pending ack frames!\n");
1411 kfree_skb(p);
1412 return 0;
1413 }
1414
ieee80211_free_hw(struct ieee80211_hw * hw)1415 void ieee80211_free_hw(struct ieee80211_hw *hw)
1416 {
1417 struct ieee80211_local *local = hw_to_local(hw);
1418 enum nl80211_band band;
1419
1420 mutex_destroy(&local->iflist_mtx);
1421 mutex_destroy(&local->mtx);
1422
1423 if (local->wiphy_ciphers_allocated)
1424 kfree(local->hw.wiphy->cipher_suites);
1425
1426 idr_for_each(&local->ack_status_frames,
1427 ieee80211_free_ack_frame, NULL);
1428 idr_destroy(&local->ack_status_frames);
1429
1430 sta_info_stop(local);
1431
1432 ieee80211_free_led_names(local);
1433
1434 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1435 if (!(local->sband_allocated & BIT(band)))
1436 continue;
1437 kfree(local->hw.wiphy->bands[band]);
1438 }
1439
1440 wiphy_free(local->hw.wiphy);
1441 }
1442 EXPORT_SYMBOL(ieee80211_free_hw);
1443
ieee80211_init(void)1444 static int __init ieee80211_init(void)
1445 {
1446 struct sk_buff *skb;
1447 int ret;
1448
1449 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1450 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1451 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1452
1453 ret = rc80211_minstrel_init();
1454 if (ret)
1455 return ret;
1456
1457 ret = ieee80211_iface_init();
1458 if (ret)
1459 goto err_netdev;
1460
1461 return 0;
1462 err_netdev:
1463 rc80211_minstrel_exit();
1464
1465 return ret;
1466 }
1467
ieee80211_exit(void)1468 static void __exit ieee80211_exit(void)
1469 {
1470 rc80211_minstrel_exit();
1471
1472 ieee80211s_stop();
1473
1474 ieee80211_iface_exit();
1475
1476 rcu_barrier();
1477 }
1478
1479
1480 subsys_initcall(ieee80211_init);
1481 module_exit(ieee80211_exit);
1482
1483 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1484 MODULE_LICENSE("GPL");
1485