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Linux 5.1.15
[linux/fpc-iii.git] / net / mac80211 / main.c
blob800e67615e2a65d1a60690e4933f672839cb1216
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright (C) 2017 Intel Deutschland GmbH
7 * Copyright (C) 2018 - 2019 Intel Corporation
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <net/mac80211.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/netdevice.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_arp.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/bitmap.h>
25 #include <linux/inetdevice.h>
26 #include <net/net_namespace.h>
27 #include <net/cfg80211.h>
28 #include <net/addrconf.h>
29
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
32 #include "rate.h"
33 #include "mesh.h"
34 #include "wep.h"
35 #include "led.h"
36 #include "debugfs.h"
37
38 void ieee80211_configure_filter(struct ieee80211_local *local)
39 {
40 u64 mc;
41 unsigned int changed_flags;
42 unsigned int new_flags = 0;
43
44 if (atomic_read(&local->iff_allmultis))
45 new_flags |= FIF_ALLMULTI;
46
47 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
48 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
49 new_flags |= FIF_BCN_PRBRESP_PROMISC;
50
51 if (local->fif_probe_req || local->probe_req_reg)
52 new_flags |= FIF_PROBE_REQ;
53
54 if (local->fif_fcsfail)
55 new_flags |= FIF_FCSFAIL;
56
57 if (local->fif_plcpfail)
58 new_flags |= FIF_PLCPFAIL;
59
60 if (local->fif_control)
61 new_flags |= FIF_CONTROL;
62
63 if (local->fif_other_bss)
64 new_flags |= FIF_OTHER_BSS;
65
66 if (local->fif_pspoll)
67 new_flags |= FIF_PSPOLL;
68
69 spin_lock_bh(&local->filter_lock);
70 changed_flags = local->filter_flags ^ new_flags;
71
72 mc = drv_prepare_multicast(local, &local->mc_list);
73 spin_unlock_bh(&local->filter_lock);
74
75 /* be a bit nasty */
76 new_flags |= (1<<31);
77
78 drv_configure_filter(local, changed_flags, &new_flags, mc);
79
80 WARN_ON(new_flags & (1<<31));
81
82 local->filter_flags = new_flags & ~(1<<31);
83 }
84
85 static void ieee80211_reconfig_filter(struct work_struct *work)
86 {
87 struct ieee80211_local *local =
88 container_of(work, struct ieee80211_local, reconfig_filter);
89
90 ieee80211_configure_filter(local);
91 }
92
93 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
94 {
95 struct ieee80211_sub_if_data *sdata;
96 struct cfg80211_chan_def chandef = {};
97 u32 changed = 0;
98 int power;
99 u32 offchannel_flag;
100
101 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
102
103 if (local->scan_chandef.chan) {
104 chandef = local->scan_chandef;
105 } else if (local->tmp_channel) {
106 chandef.chan = local->tmp_channel;
107 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
108 chandef.center_freq1 = chandef.chan->center_freq;
109 } else
110 chandef = local->_oper_chandef;
111
112 WARN(!cfg80211_chandef_valid(&chandef),
113 "control:%d MHz width:%d center: %d/%d MHz",
114 chandef.chan->center_freq, chandef.width,
115 chandef.center_freq1, chandef.center_freq2);
116
117 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
118 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
119 else
120 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
121
122 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
123
124 if (offchannel_flag ||
125 !cfg80211_chandef_identical(&local->hw.conf.chandef,
126 &local->_oper_chandef)) {
127 local->hw.conf.chandef = chandef;
128 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
129 }
130
131 if (!conf_is_ht(&local->hw.conf)) {
132 /*
133 * mac80211.h documents that this is only valid
134 * when the channel is set to an HT type, and
135 * that otherwise STATIC is used.
136 */
137 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
138 } else if (local->hw.conf.smps_mode != local->smps_mode) {
139 local->hw.conf.smps_mode = local->smps_mode;
140 changed |= IEEE80211_CONF_CHANGE_SMPS;
141 }
142
143 power = ieee80211_chandef_max_power(&chandef);
144
145 rcu_read_lock();
146 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
147 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
148 continue;
149 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
150 continue;
151 power = min(power, sdata->vif.bss_conf.txpower);
152 }
153 rcu_read_unlock();
154
155 if (local->hw.conf.power_level != power) {
156 changed |= IEEE80211_CONF_CHANGE_POWER;
157 local->hw.conf.power_level = power;
158 }
159
160 return changed;
161 }
162
163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
164 {
165 int ret = 0;
166
167 might_sleep();
168
169 if (!local->use_chanctx)
170 changed |= ieee80211_hw_conf_chan(local);
171 else
172 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
173 IEEE80211_CONF_CHANGE_POWER);
174
175 if (changed && local->open_count) {
176 ret = drv_config(local, changed);
177 /*
178 * Goal:
179 * HW reconfiguration should never fail, the driver has told
180 * us what it can support so it should live up to that promise.
181 *
182 * Current status:
183 * rfkill is not integrated with mac80211 and a
184 * configuration command can thus fail if hardware rfkill
185 * is enabled
186 *
187 * FIXME: integrate rfkill with mac80211 and then add this
188 * WARN_ON() back
189 *
190 */
191 /* WARN_ON(ret); */
192 }
193
194 return ret;
195 }
196
197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
198 u32 changed)
199 {
200 struct ieee80211_local *local = sdata->local;
201
202 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
203 return;
204
205 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
206 }
207
208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
209 {
210 sdata->vif.bss_conf.use_cts_prot = false;
211 sdata->vif.bss_conf.use_short_preamble = false;
212 sdata->vif.bss_conf.use_short_slot = false;
213 return BSS_CHANGED_ERP_CTS_PROT |
214 BSS_CHANGED_ERP_PREAMBLE |
215 BSS_CHANGED_ERP_SLOT;
216 }
217
218 static void ieee80211_tasklet_handler(unsigned long data)
219 {
220 struct ieee80211_local *local = (struct ieee80211_local *) data;
221 struct sk_buff *skb;
222
223 while ((skb = skb_dequeue(&local->skb_queue)) ||
224 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
225 switch (skb->pkt_type) {
226 case IEEE80211_RX_MSG:
227 /* Clear skb->pkt_type in order to not confuse kernel
228 * netstack. */
229 skb->pkt_type = 0;
230 ieee80211_rx(&local->hw, skb);
231 break;
232 case IEEE80211_TX_STATUS_MSG:
233 skb->pkt_type = 0;
234 ieee80211_tx_status(&local->hw, skb);
235 break;
236 default:
237 WARN(1, "mac80211: Packet is of unknown type %d\n",
238 skb->pkt_type);
239 dev_kfree_skb(skb);
240 break;
241 }
242 }
243 }
244
245 static void ieee80211_restart_work(struct work_struct *work)
246 {
247 struct ieee80211_local *local =
248 container_of(work, struct ieee80211_local, restart_work);
249 struct ieee80211_sub_if_data *sdata;
250
251 /* wait for scan work complete */
252 flush_workqueue(local->workqueue);
253 flush_work(&local->sched_scan_stopped_work);
254
255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
256 "%s called with hardware scan in progress\n", __func__);
257
258 flush_work(&local->radar_detected_work);
259 rtnl_lock();
260 list_for_each_entry(sdata, &local->interfaces, list) {
261 /*
262 * XXX: there may be more work for other vif types and even
263 * for station mode: a good thing would be to run most of
264 * the iface type's dependent _stop (ieee80211_mg_stop,
265 * ieee80211_ibss_stop) etc...
266 * For now, fix only the specific bug that was seen: race
267 * between csa_connection_drop_work and us.
268 */
269 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
270 /*
271 * This worker is scheduled from the iface worker that
272 * runs on mac80211's workqueue, so we can't be
273 * scheduling this worker after the cancel right here.
274 * The exception is ieee80211_chswitch_done.
275 * Then we can have a race...
276 */
277 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
278 }
279 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
280 }
281 ieee80211_scan_cancel(local);
282
283 /* make sure any new ROC will consider local->in_reconfig */
284 flush_delayed_work(&local->roc_work);
285 flush_work(&local->hw_roc_done);
286
287 /* wait for all packet processing to be done */
288 synchronize_net();
289
290 ieee80211_reconfig(local);
291 rtnl_unlock();
292 }
293
294 void ieee80211_restart_hw(struct ieee80211_hw *hw)
295 {
296 struct ieee80211_local *local = hw_to_local(hw);
297
298 trace_api_restart_hw(local);
299
300 wiphy_info(hw->wiphy,
301 "Hardware restart was requested\n");
302
303 /* use this reason, ieee80211_reconfig will unblock it */
304 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
305 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
306 false);
307
308 /*
309 * Stop all Rx during the reconfig. We don't want state changes
310 * or driver callbacks while this is in progress.
311 */
312 local->in_reconfig = true;
313 barrier();
314
315 queue_work(system_freezable_wq, &local->restart_work);
316 }
317 EXPORT_SYMBOL(ieee80211_restart_hw);
318
319 #ifdef CONFIG_INET
320 static int ieee80211_ifa_changed(struct notifier_block *nb,
321 unsigned long data, void *arg)
322 {
323 struct in_ifaddr *ifa = arg;
324 struct ieee80211_local *local =
325 container_of(nb, struct ieee80211_local,
326 ifa_notifier);
327 struct net_device *ndev = ifa->ifa_dev->dev;
328 struct wireless_dev *wdev = ndev->ieee80211_ptr;
329 struct in_device *idev;
330 struct ieee80211_sub_if_data *sdata;
331 struct ieee80211_bss_conf *bss_conf;
332 struct ieee80211_if_managed *ifmgd;
333 int c = 0;
334
335 /* Make sure it's our interface that got changed */
336 if (!wdev)
337 return NOTIFY_DONE;
338
339 if (wdev->wiphy != local->hw.wiphy)
340 return NOTIFY_DONE;
341
342 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
343 bss_conf = &sdata->vif.bss_conf;
344
345 /* ARP filtering is only supported in managed mode */
346 if (sdata->vif.type != NL80211_IFTYPE_STATION)
347 return NOTIFY_DONE;
348
349 idev = __in_dev_get_rtnl(sdata->dev);
350 if (!idev)
351 return NOTIFY_DONE;
352
353 ifmgd = &sdata->u.mgd;
354 sdata_lock(sdata);
355
356 /* Copy the addresses to the bss_conf list */
357 ifa = idev->ifa_list;
358 while (ifa) {
359 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
360 bss_conf->arp_addr_list[c] = ifa->ifa_address;
361 ifa = ifa->ifa_next;
362 c++;
363 }
364
365 bss_conf->arp_addr_cnt = c;
366
367 /* Configure driver only if associated (which also implies it is up) */
368 if (ifmgd->associated)
369 ieee80211_bss_info_change_notify(sdata,
370 BSS_CHANGED_ARP_FILTER);
371
372 sdata_unlock(sdata);
373
374 return NOTIFY_OK;
375 }
376 #endif
377
378 #if IS_ENABLED(CONFIG_IPV6)
379 static int ieee80211_ifa6_changed(struct notifier_block *nb,
380 unsigned long data, void *arg)
381 {
382 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
383 struct inet6_dev *idev = ifa->idev;
384 struct net_device *ndev = ifa->idev->dev;
385 struct ieee80211_local *local =
386 container_of(nb, struct ieee80211_local, ifa6_notifier);
387 struct wireless_dev *wdev = ndev->ieee80211_ptr;
388 struct ieee80211_sub_if_data *sdata;
389
390 /* Make sure it's our interface that got changed */
391 if (!wdev || wdev->wiphy != local->hw.wiphy)
392 return NOTIFY_DONE;
393
394 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
395
396 /*
397 * For now only support station mode. This is mostly because
398 * doing AP would have to handle AP_VLAN in some way ...
399 */
400 if (sdata->vif.type != NL80211_IFTYPE_STATION)
401 return NOTIFY_DONE;
402
403 drv_ipv6_addr_change(local, sdata, idev);
404
405 return NOTIFY_OK;
406 }
407 #endif
408
409 /* There isn't a lot of sense in it, but you can transmit anything you like */
410 static const struct ieee80211_txrx_stypes
411 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
412 [NL80211_IFTYPE_ADHOC] = {
413 .tx = 0xffff,
414 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
415 BIT(IEEE80211_STYPE_AUTH >> 4) |
416 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
418 },
419 [NL80211_IFTYPE_STATION] = {
420 .tx = 0xffff,
421 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
423 },
424 [NL80211_IFTYPE_AP] = {
425 .tx = 0xffff,
426 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
427 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
428 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
429 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
430 BIT(IEEE80211_STYPE_AUTH >> 4) |
431 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
432 BIT(IEEE80211_STYPE_ACTION >> 4),
433 },
434 [NL80211_IFTYPE_AP_VLAN] = {
435 /* copy AP */
436 .tx = 0xffff,
437 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
438 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
439 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
440 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
441 BIT(IEEE80211_STYPE_AUTH >> 4) |
442 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
443 BIT(IEEE80211_STYPE_ACTION >> 4),
444 },
445 [NL80211_IFTYPE_P2P_CLIENT] = {
446 .tx = 0xffff,
447 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
448 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
449 },
450 [NL80211_IFTYPE_P2P_GO] = {
451 .tx = 0xffff,
452 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
453 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
454 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
455 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
456 BIT(IEEE80211_STYPE_AUTH >> 4) |
457 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
458 BIT(IEEE80211_STYPE_ACTION >> 4),
459 },
460 [NL80211_IFTYPE_MESH_POINT] = {
461 .tx = 0xffff,
462 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
463 BIT(IEEE80211_STYPE_AUTH >> 4) |
464 BIT(IEEE80211_STYPE_DEAUTH >> 4),
465 },
466 [NL80211_IFTYPE_P2P_DEVICE] = {
467 .tx = 0xffff,
468 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
469 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
470 },
471 };
472
473 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
474 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
475 IEEE80211_HT_AMPDU_PARM_DENSITY,
476
477 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
478 IEEE80211_HT_CAP_MAX_AMSDU |
479 IEEE80211_HT_CAP_SGI_20 |
480 IEEE80211_HT_CAP_SGI_40 |
481 IEEE80211_HT_CAP_TX_STBC |
482 IEEE80211_HT_CAP_RX_STBC |
483 IEEE80211_HT_CAP_LDPC_CODING |
484 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
485 .mcs = {
486 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
487 0xff, 0xff, 0xff, 0xff, 0xff, },
488 },
489 };
490
491 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
492 .vht_cap_info =
493 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
494 IEEE80211_VHT_CAP_SHORT_GI_80 |
495 IEEE80211_VHT_CAP_SHORT_GI_160 |
496 IEEE80211_VHT_CAP_RXSTBC_MASK |
497 IEEE80211_VHT_CAP_TXSTBC |
498 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
499 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
500 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
501 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
502 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
503 .supp_mcs = {
504 .rx_mcs_map = cpu_to_le16(~0),
505 .tx_mcs_map = cpu_to_le16(~0),
506 },
507 };
508
509 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
510 const struct ieee80211_ops *ops,
511 const char *requested_name)
512 {
513 struct ieee80211_local *local;
514 int priv_size, i;
515 struct wiphy *wiphy;
516 bool use_chanctx;
517
518 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
519 !ops->add_interface || !ops->remove_interface ||
520 !ops->configure_filter))
521 return NULL;
522
523 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
524 return NULL;
525
526 /* check all or no channel context operations exist */
527 i = !!ops->add_chanctx + !!ops->remove_chanctx +
528 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
529 !!ops->unassign_vif_chanctx;
530 if (WARN_ON(i != 0 && i != 5))
531 return NULL;
532 use_chanctx = i == 5;
533
534 /* Ensure 32-byte alignment of our private data and hw private data.
535 * We use the wiphy priv data for both our ieee80211_local and for
536 * the driver's private data
537 *
538 * In memory it'll be like this:
539 *
540 * +-------------------------+
541 * | struct wiphy |
542 * +-------------------------+
543 * | struct ieee80211_local |
544 * +-------------------------+
545 * | driver's private data |
546 * +-------------------------+
547 *
548 */
549 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
550
551 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
552
553 if (!wiphy)
554 return NULL;
555
556 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
557
558 wiphy->privid = mac80211_wiphy_privid;
559
560 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
561 WIPHY_FLAG_4ADDR_AP |
562 WIPHY_FLAG_4ADDR_STATION |
563 WIPHY_FLAG_REPORTS_OBSS |
564 WIPHY_FLAG_OFFCHAN_TX;
565
566 if (ops->remain_on_channel)
567 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
568
569 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
570 NL80211_FEATURE_SAE |
571 NL80211_FEATURE_HT_IBSS |
572 NL80211_FEATURE_VIF_TXPOWER |
573 NL80211_FEATURE_MAC_ON_CREATE |
574 NL80211_FEATURE_USERSPACE_MPM |
575 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
576 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
577 wiphy_ext_feature_set(wiphy,
578 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
579
580 if (!ops->hw_scan) {
581 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
582 NL80211_FEATURE_AP_SCAN;
583 /*
584 * if the driver behaves correctly using the probe request
585 * (template) from mac80211, then both of these should be
586 * supported even with hw scan - but let drivers opt in.
587 */
588 wiphy_ext_feature_set(wiphy,
589 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
590 wiphy_ext_feature_set(wiphy,
591 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
592 }
593
594 if (!ops->set_key)
595 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
596
597 if (ops->wake_tx_queue)
598 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
599
600 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
601
602 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
603
604 local = wiphy_priv(wiphy);
605
606 if (sta_info_init(local))
607 goto err_free;
608
609 local->hw.wiphy = wiphy;
610
611 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
612
613 local->ops = ops;
614 local->use_chanctx = use_chanctx;
615
616 /*
617 * We need a bit of data queued to build aggregates properly, so
618 * instruct the TCP stack to allow more than a single ms of data
619 * to be queued in the stack. The value is a bit-shift of 1
620 * second, so 7 is ~8ms of queued data. Only affects local TCP
621 * sockets.
622 * This is the default, anyhow - drivers may need to override it
623 * for local reasons (longer buffers, longer completion time, or
624 * similar).
625 */
626 local->hw.tx_sk_pacing_shift = 7;
627
628 /* set up some defaults */
629 local->hw.queues = 1;
630 local->hw.max_rates = 1;
631 local->hw.max_report_rates = 0;
632 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
633 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
634 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
635 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
636 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
637 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
638 IEEE80211_RADIOTAP_MCS_HAVE_GI |
639 IEEE80211_RADIOTAP_MCS_HAVE_BW;
640 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
641 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
642 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
643 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
644 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
645 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
646 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
647
648 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
649
650 wiphy->extended_capabilities = local->ext_capa;
651 wiphy->extended_capabilities_mask = local->ext_capa;
652 wiphy->extended_capabilities_len =
653 ARRAY_SIZE(local->ext_capa);
654
655 INIT_LIST_HEAD(&local->interfaces);
656 INIT_LIST_HEAD(&local->mon_list);
657
658 __hw_addr_init(&local->mc_list);
659
660 mutex_init(&local->iflist_mtx);
661 mutex_init(&local->mtx);
662
663 mutex_init(&local->key_mtx);
664 spin_lock_init(&local->filter_lock);
665 spin_lock_init(&local->rx_path_lock);
666 spin_lock_init(&local->queue_stop_reason_lock);
667
668 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
669 INIT_LIST_HEAD(&local->active_txqs[i]);
670 spin_lock_init(&local->active_txq_lock[i]);
671 }
672 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
673
674 INIT_LIST_HEAD(&local->chanctx_list);
675 mutex_init(&local->chanctx_mtx);
676
677 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
678
679 INIT_WORK(&local->restart_work, ieee80211_restart_work);
680
681 INIT_WORK(&local->radar_detected_work,
682 ieee80211_dfs_radar_detected_work);
683
684 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
685 local->smps_mode = IEEE80211_SMPS_OFF;
686
687 INIT_WORK(&local->dynamic_ps_enable_work,
688 ieee80211_dynamic_ps_enable_work);
689 INIT_WORK(&local->dynamic_ps_disable_work,
690 ieee80211_dynamic_ps_disable_work);
691 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
692
693 INIT_WORK(&local->sched_scan_stopped_work,
694 ieee80211_sched_scan_stopped_work);
695
696 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
697
698 spin_lock_init(&local->ack_status_lock);
699 idr_init(&local->ack_status_frames);
700
701 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
702 skb_queue_head_init(&local->pending[i]);
703 atomic_set(&local->agg_queue_stop[i], 0);
704 }
705 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
706 (unsigned long)local);
707
708 if (ops->wake_tx_queue)
709 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs,
710 (unsigned long)local);
711
712 tasklet_init(&local->tasklet,
713 ieee80211_tasklet_handler,
714 (unsigned long) local);
715
716 skb_queue_head_init(&local->skb_queue);
717 skb_queue_head_init(&local->skb_queue_unreliable);
718 skb_queue_head_init(&local->skb_queue_tdls_chsw);
719
720 ieee80211_alloc_led_names(local);
721
722 ieee80211_roc_setup(local);
723
724 local->hw.radiotap_timestamp.units_pos = -1;
725 local->hw.radiotap_timestamp.accuracy = -1;
726
727 return &local->hw;
728 err_free:
729 wiphy_free(wiphy);
730 return NULL;
731 }
732 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
733
734 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
735 {
736 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
737 IS_ERR(local->wep_rx_tfm));
738 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
739 int n_suites = 0, r = 0, w = 0;
740 u32 *suites;
741 static const u32 cipher_suites[] = {
742 /* keep WEP first, it may be removed below */
743 WLAN_CIPHER_SUITE_WEP40,
744 WLAN_CIPHER_SUITE_WEP104,
745 WLAN_CIPHER_SUITE_TKIP,
746 WLAN_CIPHER_SUITE_CCMP,
747 WLAN_CIPHER_SUITE_CCMP_256,
748 WLAN_CIPHER_SUITE_GCMP,
749 WLAN_CIPHER_SUITE_GCMP_256,
750
751 /* keep last -- depends on hw flags! */
752 WLAN_CIPHER_SUITE_AES_CMAC,
753 WLAN_CIPHER_SUITE_BIP_CMAC_256,
754 WLAN_CIPHER_SUITE_BIP_GMAC_128,
755 WLAN_CIPHER_SUITE_BIP_GMAC_256,
756 };
757
758 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
759 local->hw.wiphy->cipher_suites) {
760 /* If the driver advertises, or doesn't support SW crypto,
761 * we only need to remove WEP if necessary.
762 */
763 if (have_wep)
764 return 0;
765
766 /* well if it has _no_ ciphers ... fine */
767 if (!local->hw.wiphy->n_cipher_suites)
768 return 0;
769
770 /* Driver provides cipher suites, but we need to exclude WEP */
771 suites = kmemdup(local->hw.wiphy->cipher_suites,
772 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
773 GFP_KERNEL);
774 if (!suites)
775 return -ENOMEM;
776
777 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
778 u32 suite = local->hw.wiphy->cipher_suites[r];
779
780 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
781 suite == WLAN_CIPHER_SUITE_WEP104)
782 continue;
783 suites[w++] = suite;
784 }
785 } else if (!local->hw.cipher_schemes) {
786 /* If the driver doesn't have cipher schemes, there's nothing
787 * else to do other than assign the (software supported and
788 * perhaps offloaded) cipher suites.
789 */
790 local->hw.wiphy->cipher_suites = cipher_suites;
791 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
792
793 if (!have_mfp)
794 local->hw.wiphy->n_cipher_suites -= 4;
795
796 if (!have_wep) {
797 local->hw.wiphy->cipher_suites += 2;
798 local->hw.wiphy->n_cipher_suites -= 2;
799 }
800
801 /* not dynamically allocated, so just return */
802 return 0;
803 } else {
804 const struct ieee80211_cipher_scheme *cs;
805
806 cs = local->hw.cipher_schemes;
807
808 /* Driver specifies cipher schemes only (but not cipher suites
809 * including the schemes)
810 *
811 * We start counting ciphers defined by schemes, TKIP, CCMP,
812 * CCMP-256, GCMP, and GCMP-256
813 */
814 n_suites = local->hw.n_cipher_schemes + 5;
815
816 /* check if we have WEP40 and WEP104 */
817 if (have_wep)
818 n_suites += 2;
819
820 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
821 * BIP-GMAC-256
822 */
823 if (have_mfp)
824 n_suites += 4;
825
826 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
827 if (!suites)
828 return -ENOMEM;
829
830 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
831 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
832 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
833 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
834 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
835
836 if (have_wep) {
837 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
838 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
839 }
840
841 if (have_mfp) {
842 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
843 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
844 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
845 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
846 }
847
848 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
849 suites[w++] = cs[r].cipher;
850 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
851 kfree(suites);
852 return -EINVAL;
853 }
854 }
855 }
856
857 local->hw.wiphy->cipher_suites = suites;
858 local->hw.wiphy->n_cipher_suites = w;
859 local->wiphy_ciphers_allocated = true;
860
861 return 0;
862 }
863
864 int ieee80211_register_hw(struct ieee80211_hw *hw)
865 {
866 struct ieee80211_local *local = hw_to_local(hw);
867 int result, i;
868 enum nl80211_band band;
869 int channels, max_bitrates;
870 bool supp_ht, supp_vht, supp_he;
871 netdev_features_t feature_whitelist;
872 struct cfg80211_chan_def dflt_chandef = {};
873
874 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
875 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
876 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
877 return -EINVAL;
878
879 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
880 (!local->ops->tdls_channel_switch ||
881 !local->ops->tdls_cancel_channel_switch ||
882 !local->ops->tdls_recv_channel_switch))
883 return -EOPNOTSUPP;
884
885 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
886 !local->ops->set_frag_threshold))
887 return -EINVAL;
888
889 if (WARN_ON(local->hw.wiphy->interface_modes &
890 BIT(NL80211_IFTYPE_NAN) &&
891 (!local->ops->start_nan || !local->ops->stop_nan)))
892 return -EINVAL;
893
894 #ifdef CONFIG_PM
895 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
896 return -EINVAL;
897 #endif
898
899 if (!local->use_chanctx) {
900 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
901 const struct ieee80211_iface_combination *comb;
902
903 comb = &local->hw.wiphy->iface_combinations[i];
904
905 if (comb->num_different_channels > 1)
906 return -EINVAL;
907 }
908 } else {
909 /*
910 * WDS is currently prohibited when channel contexts are used
911 * because there's no clear definition of which channel WDS
912 * type interfaces use
913 */
914 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
915 return -EINVAL;
916
917 /* DFS is not supported with multi-channel combinations yet */
918 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
919 const struct ieee80211_iface_combination *comb;
920
921 comb = &local->hw.wiphy->iface_combinations[i];
922
923 if (comb->radar_detect_widths &&
924 comb->num_different_channels > 1)
925 return -EINVAL;
926 }
927 }
928
929 /* Only HW csum features are currently compatible with mac80211 */
930 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
931 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
932 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
933 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
934 return -EINVAL;
935
936 if (hw->max_report_rates == 0)
937 hw->max_report_rates = hw->max_rates;
938
939 local->rx_chains = 1;
940
941 /*
942 * generic code guarantees at least one band,
943 * set this very early because much code assumes
944 * that hw.conf.channel is assigned
945 */
946 channels = 0;
947 max_bitrates = 0;
948 supp_ht = false;
949 supp_vht = false;
950 supp_he = false;
951 for (band = 0; band < NUM_NL80211_BANDS; band++) {
952 struct ieee80211_supported_band *sband;
953
954 sband = local->hw.wiphy->bands[band];
955 if (!sband)
956 continue;
957
958 if (!dflt_chandef.chan) {
959 cfg80211_chandef_create(&dflt_chandef,
960 &sband->channels[0],
961 NL80211_CHAN_NO_HT);
962 /* init channel we're on */
963 if (!local->use_chanctx && !local->_oper_chandef.chan) {
964 local->hw.conf.chandef = dflt_chandef;
965 local->_oper_chandef = dflt_chandef;
966 }
967 local->monitor_chandef = dflt_chandef;
968 }
969
970 channels += sband->n_channels;
971
972 if (max_bitrates < sband->n_bitrates)
973 max_bitrates = sband->n_bitrates;
974 supp_ht = supp_ht || sband->ht_cap.ht_supported;
975 supp_vht = supp_vht || sband->vht_cap.vht_supported;
976
977 if (!supp_he)
978 supp_he = !!ieee80211_get_he_sta_cap(sband);
979
980 if (!sband->ht_cap.ht_supported)
981 continue;
982
983 /* TODO: consider VHT for RX chains, hopefully it's the same */
984 local->rx_chains =
985 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
986 local->rx_chains);
987
988 /* no need to mask, SM_PS_DISABLED has all bits set */
989 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
990 IEEE80211_HT_CAP_SM_PS_SHIFT;
991 }
992
993 /* if low-level driver supports AP, we also support VLAN.
994 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
995 * based on their support to transmit SW encrypted packets.
996 */
997 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
998 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
999 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1000 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1001 }
1002
1003 /* mac80211 always supports monitor */
1004 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1005 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1006
1007 /* mac80211 doesn't support more than one IBSS interface right now */
1008 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1009 const struct ieee80211_iface_combination *c;
1010 int j;
1011
1012 c = &hw->wiphy->iface_combinations[i];
1013
1014 for (j = 0; j < c->n_limits; j++)
1015 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1016 c->limits[j].max > 1)
1017 return -EINVAL;
1018 }
1019
1020 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1021 sizeof(void *) * channels, GFP_KERNEL);
1022 if (!local->int_scan_req)
1023 return -ENOMEM;
1024
1025 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1026 if (!local->hw.wiphy->bands[band])
1027 continue;
1028 local->int_scan_req->rates[band] = (u32) -1;
1029 }
1030
1031 #ifndef CONFIG_MAC80211_MESH
1032 /* mesh depends on Kconfig, but drivers should set it if they want */
1033 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1034 #endif
1035
1036 /* if the underlying driver supports mesh, mac80211 will (at least)
1037 * provide routing of mesh authentication frames to userspace */
1038 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1039 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1040
1041 /* mac80211 supports control port protocol changing */
1042 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1043
1044 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1045 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1046 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1047 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1048 if (hw->max_signal <= 0) {
1049 result = -EINVAL;
1050 goto fail_wiphy_register;
1051 }
1052 }
1053
1054 /*
1055 * Calculate scan IE length -- we need this to alloc
1056 * memory and to subtract from the driver limit. It
1057 * includes the DS Params, (extended) supported rates, and HT
1058 * information -- SSID is the driver's responsibility.
1059 */
1060 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1061 3 /* DS Params */;
1062 if (supp_ht)
1063 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1064
1065 if (supp_vht)
1066 local->scan_ies_len +=
1067 2 + sizeof(struct ieee80211_vht_cap);
1068
1069 /* HE cap element is variable in size - set len to allow max size */
1070 /*
1071 * TODO: 1 is added at the end of the calculation to accommodate for
1072 * the temporary placing of the HE capabilities IE under EXT.
1073 * Remove it once it is placed in the final place.
1074 */
1075 if (supp_he)
1076 local->scan_ies_len +=
1077 2 + sizeof(struct ieee80211_he_cap_elem) +
1078 sizeof(struct ieee80211_he_mcs_nss_supp) +
1079 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1080
1081 if (!local->ops->hw_scan) {
1082 /* For hw_scan, driver needs to set these up. */
1083 local->hw.wiphy->max_scan_ssids = 4;
1084 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1085 }
1086
1087 /*
1088 * If the driver supports any scan IEs, then assume the
1089 * limit includes the IEs mac80211 will add, otherwise
1090 * leave it at zero and let the driver sort it out; we
1091 * still pass our IEs to the driver but userspace will
1092 * not be allowed to in that case.
1093 */
1094 if (local->hw.wiphy->max_scan_ie_len)
1095 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1096
1097 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1098 local->hw.n_cipher_schemes));
1099
1100 result = ieee80211_init_cipher_suites(local);
1101 if (result < 0)
1102 goto fail_wiphy_register;
1103
1104 if (!local->ops->remain_on_channel)
1105 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1106
1107 /* mac80211 based drivers don't support internal TDLS setup */
1108 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1109 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1110
1111 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1112 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1113 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1114
1115 /* mac80211 supports multi BSSID, if the driver supports it */
1116 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1117 local->hw.wiphy->support_mbssid = true;
1118 if (ieee80211_hw_check(&local->hw,
1119 SUPPORTS_ONLY_HE_MULTI_BSSID))
1120 local->hw.wiphy->support_only_he_mbssid = true;
1121 else
1122 local->ext_capa[2] |=
1123 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1124 }
1125
1126 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1127
1128 result = wiphy_register(local->hw.wiphy);
1129 if (result < 0)
1130 goto fail_wiphy_register;
1131
1132 /*
1133 * We use the number of queues for feature tests (QoS, HT) internally
1134 * so restrict them appropriately.
1135 */
1136 if (hw->queues > IEEE80211_MAX_QUEUES)
1137 hw->queues = IEEE80211_MAX_QUEUES;
1138
1139 local->workqueue =
1140 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1141 if (!local->workqueue) {
1142 result = -ENOMEM;
1143 goto fail_workqueue;
1144 }
1145
1146 /*
1147 * The hardware needs headroom for sending the frame,
1148 * and we need some headroom for passing the frame to monitor
1149 * interfaces, but never both at the same time.
1150 */
1151 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1152 IEEE80211_TX_STATUS_HEADROOM);
1153
1154 debugfs_hw_add(local);
1155
1156 /*
1157 * if the driver doesn't specify a max listen interval we
1158 * use 5 which should be a safe default
1159 */
1160 if (local->hw.max_listen_interval == 0)
1161 local->hw.max_listen_interval = 5;
1162
1163 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1164
1165 local->dynamic_ps_forced_timeout = -1;
1166
1167 if (!local->hw.max_nan_de_entries)
1168 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1169
1170 if (!local->hw.weight_multiplier)
1171 local->hw.weight_multiplier = 1;
1172
1173 result = ieee80211_wep_init(local);
1174 if (result < 0)
1175 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1176 result);
1177
1178 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1179
1180 ieee80211_led_init(local);
1181
1182 result = ieee80211_txq_setup_flows(local);
1183 if (result)
1184 goto fail_flows;
1185
1186 rtnl_lock();
1187
1188 result = ieee80211_init_rate_ctrl_alg(local,
1189 hw->rate_control_algorithm);
1190 if (result < 0) {
1191 wiphy_debug(local->hw.wiphy,
1192 "Failed to initialize rate control algorithm\n");
1193 goto fail_rate;
1194 }
1195
1196 if (local->rate_ctrl) {
1197 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1198 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1199 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1200 }
1201
1202 /*
1203 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1204 * or have it when we don't, copy the sband structure and set/clear it.
1205 * This is necessary because rate scaling algorithms could be switched
1206 * and have different support values.
1207 * Print a message so that in the common case the reallocation can be
1208 * avoided.
1209 */
1210 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1211 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1212 struct ieee80211_supported_band *sband;
1213 bool local_cap, ie_cap;
1214
1215 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1216
1217 sband = local->hw.wiphy->bands[band];
1218 if (!sband || !sband->vht_cap.vht_supported)
1219 continue;
1220
1221 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1222 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1223
1224 if (local_cap == ie_cap)
1225 continue;
1226
1227 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1228 if (!sband) {
1229 result = -ENOMEM;
1230 goto fail_rate;
1231 }
1232
1233 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1234 band);
1235
1236 sband->vht_cap.vht_mcs.tx_highest ^=
1237 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1238
1239 local->hw.wiphy->bands[band] = sband;
1240 local->sband_allocated |= BIT(band);
1241 }
1242
1243 /* add one default STA interface if supported */
1244 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1245 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1246 struct vif_params params = {0};
1247
1248 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1249 NL80211_IFTYPE_STATION, &params);
1250 if (result)
1251 wiphy_warn(local->hw.wiphy,
1252 "Failed to add default virtual iface\n");
1253 }
1254
1255 rtnl_unlock();
1256
1257 #ifdef CONFIG_INET
1258 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1259 result = register_inetaddr_notifier(&local->ifa_notifier);
1260 if (result)
1261 goto fail_ifa;
1262 #endif
1263
1264 #if IS_ENABLED(CONFIG_IPV6)
1265 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1266 result = register_inet6addr_notifier(&local->ifa6_notifier);
1267 if (result)
1268 goto fail_ifa6;
1269 #endif
1270
1271 return 0;
1272
1273 #if IS_ENABLED(CONFIG_IPV6)
1274 fail_ifa6:
1275 #ifdef CONFIG_INET
1276 unregister_inetaddr_notifier(&local->ifa_notifier);
1277 #endif
1278 #endif
1279 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1280 fail_ifa:
1281 #endif
1282 rtnl_lock();
1283 rate_control_deinitialize(local);
1284 ieee80211_remove_interfaces(local);
1285 fail_rate:
1286 rtnl_unlock();
1287 ieee80211_led_exit(local);
1288 ieee80211_wep_free(local);
1289 fail_flows:
1290 destroy_workqueue(local->workqueue);
1291 fail_workqueue:
1292 wiphy_unregister(local->hw.wiphy);
1293 fail_wiphy_register:
1294 if (local->wiphy_ciphers_allocated)
1295 kfree(local->hw.wiphy->cipher_suites);
1296 kfree(local->int_scan_req);
1297 return result;
1298 }
1299 EXPORT_SYMBOL(ieee80211_register_hw);
1300
1301 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1302 {
1303 struct ieee80211_local *local = hw_to_local(hw);
1304
1305 tasklet_kill(&local->tx_pending_tasklet);
1306 tasklet_kill(&local->tasklet);
1307
1308 #ifdef CONFIG_INET
1309 unregister_inetaddr_notifier(&local->ifa_notifier);
1310 #endif
1311 #if IS_ENABLED(CONFIG_IPV6)
1312 unregister_inet6addr_notifier(&local->ifa6_notifier);
1313 #endif
1314
1315 rtnl_lock();
1316
1317 /*
1318 * At this point, interface list manipulations are fine
1319 * because the driver cannot be handing us frames any
1320 * more and the tasklet is killed.
1321 */
1322 ieee80211_remove_interfaces(local);
1323
1324 rtnl_unlock();
1325
1326 cancel_delayed_work_sync(&local->roc_work);
1327 cancel_work_sync(&local->restart_work);
1328 cancel_work_sync(&local->reconfig_filter);
1329 cancel_work_sync(&local->tdls_chsw_work);
1330 flush_work(&local->sched_scan_stopped_work);
1331 flush_work(&local->radar_detected_work);
1332
1333 ieee80211_clear_tx_pending(local);
1334 rate_control_deinitialize(local);
1335
1336 if (skb_queue_len(&local->skb_queue) ||
1337 skb_queue_len(&local->skb_queue_unreliable))
1338 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1339 skb_queue_purge(&local->skb_queue);
1340 skb_queue_purge(&local->skb_queue_unreliable);
1341 skb_queue_purge(&local->skb_queue_tdls_chsw);
1342
1343 destroy_workqueue(local->workqueue);
1344 wiphy_unregister(local->hw.wiphy);
1345 ieee80211_wep_free(local);
1346 ieee80211_led_exit(local);
1347 kfree(local->int_scan_req);
1348 }
1349 EXPORT_SYMBOL(ieee80211_unregister_hw);
1350
1351 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1352 {
1353 WARN_ONCE(1, "Have pending ack frames!\n");
1354 kfree_skb(p);
1355 return 0;
1356 }
1357
1358 void ieee80211_free_hw(struct ieee80211_hw *hw)
1359 {
1360 struct ieee80211_local *local = hw_to_local(hw);
1361 enum nl80211_band band;
1362
1363 mutex_destroy(&local->iflist_mtx);
1364 mutex_destroy(&local->mtx);
1365
1366 if (local->wiphy_ciphers_allocated)
1367 kfree(local->hw.wiphy->cipher_suites);
1368
1369 idr_for_each(&local->ack_status_frames,
1370 ieee80211_free_ack_frame, NULL);
1371 idr_destroy(&local->ack_status_frames);
1372
1373 sta_info_stop(local);
1374
1375 ieee80211_free_led_names(local);
1376
1377 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1378 if (!(local->sband_allocated & BIT(band)))
1379 continue;
1380 kfree(local->hw.wiphy->bands[band]);
1381 }
1382
1383 wiphy_free(local->hw.wiphy);
1384 }
1385 EXPORT_SYMBOL(ieee80211_free_hw);
1386
1387 static int __init ieee80211_init(void)
1388 {
1389 struct sk_buff *skb;
1390 int ret;
1391
1392 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1393 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1394 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1395
1396 ret = rc80211_minstrel_init();
1397 if (ret)
1398 return ret;
1399
1400 ret = ieee80211_iface_init();
1401 if (ret)
1402 goto err_netdev;
1403
1404 return 0;
1405 err_netdev:
1406 rc80211_minstrel_exit();
1407
1408 return ret;
1409 }
1410
1411 static void __exit ieee80211_exit(void)
1412 {
1413 rc80211_minstrel_exit();
1414
1415 ieee80211s_stop();
1416
1417 ieee80211_iface_exit();
1418
1419 rcu_barrier();
1420 }
1421
1422
1423 subsys_initcall(ieee80211_init);
1424 module_exit(ieee80211_exit);
1425
1426 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1427 MODULE_LICENSE("GPL");
Linux with added FPC-III support