1 // SPDX-License-Identifier: GPL-2.0-only
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) 2018-2023 Intel Corporation
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/dropreason.h>
26 #include <net/cfg80211.h>
27 #include <net/addrconf.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
37 void ieee80211_configure_filter(struct ieee80211_local *local)
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
43 if (atomic_read(&local->iff_allmultis))
44 new_flags |= FIF_ALLMULTI;
46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
48 new_flags |= FIF_BCN_PRBRESP_PROMISC;
50 if (local->fif_probe_req || local->probe_req_reg)
51 new_flags |= FIF_PROBE_REQ;
53 if (local->fif_fcsfail)
54 new_flags |= FIF_FCSFAIL;
56 if (local->fif_plcpfail)
57 new_flags |= FIF_PLCPFAIL;
59 if (local->fif_control)
60 new_flags |= FIF_CONTROL;
62 if (local->fif_other_bss)
63 new_flags |= FIF_OTHER_BSS;
65 if (local->fif_pspoll)
66 new_flags |= FIF_PSPOLL;
68 if (local->rx_mcast_action_reg)
69 new_flags |= FIF_MCAST_ACTION;
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
82 WARN_ON(new_flags & (1<<31));
84 local->filter_flags = new_flags & ~(1<<31);
87 static void ieee80211_reconfig_filter(struct wiphy *wiphy,
88 struct wiphy_work *work)
90 struct ieee80211_local *local =
91 container_of(work, struct ieee80211_local, reconfig_filter);
93 ieee80211_configure_filter(local);
96 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
98 struct ieee80211_sub_if_data *sdata;
99 struct cfg80211_chan_def chandef = {};
104 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
106 if (local->scan_chandef.chan) {
107 chandef = local->scan_chandef;
108 } else if (local->tmp_channel) {
109 chandef.chan = local->tmp_channel;
110 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
111 chandef.center_freq1 = chandef.chan->center_freq;
112 chandef.freq1_offset = chandef.chan->freq_offset;
114 chandef = local->_oper_chandef;
116 WARN(!cfg80211_chandef_valid(&chandef),
117 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz",
118 chandef.chan->center_freq, chandef.chan->freq_offset,
119 chandef.width, chandef.center_freq1, chandef.freq1_offset,
120 chandef.center_freq2);
122 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
123 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
125 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
127 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
129 if (offchannel_flag ||
130 !cfg80211_chandef_identical(&local->hw.conf.chandef,
131 &local->_oper_chandef)) {
132 local->hw.conf.chandef = chandef;
133 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
136 if (!conf_is_ht(&local->hw.conf)) {
138 * mac80211.h documents that this is only valid
139 * when the channel is set to an HT type, and
140 * that otherwise STATIC is used.
142 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
143 } else if (local->hw.conf.smps_mode != local->smps_mode) {
144 local->hw.conf.smps_mode = local->smps_mode;
145 changed |= IEEE80211_CONF_CHANGE_SMPS;
148 power = ieee80211_chandef_max_power(&chandef);
151 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
152 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf))
154 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
156 if (sdata->vif.bss_conf.txpower == INT_MIN)
158 power = min(power, sdata->vif.bss_conf.txpower);
162 if (local->hw.conf.power_level != power) {
163 changed |= IEEE80211_CONF_CHANGE_POWER;
164 local->hw.conf.power_level = power;
170 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
176 if (!local->use_chanctx)
177 changed |= ieee80211_hw_conf_chan(local);
179 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
180 IEEE80211_CONF_CHANGE_POWER |
181 IEEE80211_CONF_CHANGE_SMPS);
183 if (changed && local->open_count) {
184 ret = drv_config(local, changed);
187 * HW reconfiguration should never fail, the driver has told
188 * us what it can support so it should live up to that promise.
191 * rfkill is not integrated with mac80211 and a
192 * configuration command can thus fail if hardware rfkill
195 * FIXME: integrate rfkill with mac80211 and then add this
205 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\
209 BSS_CHANGED_ARP_FILTER |\
211 BSS_CHANGED_MLD_VALID_LINKS)
213 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
216 struct ieee80211_local *local = sdata->local;
220 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
223 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON |
224 BSS_CHANGED_BEACON_ENABLED) &&
225 sdata->vif.type != NL80211_IFTYPE_AP &&
226 sdata->vif.type != NL80211_IFTYPE_ADHOC &&
227 sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
228 sdata->vif.type != NL80211_IFTYPE_OCB))
231 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE ||
232 sdata->vif.type == NL80211_IFTYPE_NAN ||
233 (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
234 !sdata->vif.bss_conf.mu_mimo_owner &&
235 !(changed & BSS_CHANGED_TXPOWER))))
238 if (!check_sdata_in_driver(sdata))
241 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) {
242 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS;
244 trace_drv_vif_cfg_changed(local, sdata, changed);
245 if (local->ops->vif_cfg_changed)
246 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch);
249 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) {
250 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS;
252 /* FIXME: should be for each link */
253 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf,
255 if (local->ops->link_info_changed)
256 local->ops->link_info_changed(&local->hw, &sdata->vif,
257 &sdata->vif.bss_conf, ch);
260 if (local->ops->bss_info_changed)
261 local->ops->bss_info_changed(&local->hw, &sdata->vif,
262 &sdata->vif.bss_conf, changed);
263 trace_drv_return_void(local);
266 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata,
269 struct ieee80211_local *local = sdata->local;
271 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS);
273 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
276 drv_vif_cfg_changed(local, sdata, changed);
279 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata,
280 struct ieee80211_link_data *link,
283 struct ieee80211_local *local = sdata->local;
285 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS);
287 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
290 if (!check_sdata_in_driver(sdata))
293 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed);
296 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
298 sdata->vif.bss_conf.use_cts_prot = false;
299 sdata->vif.bss_conf.use_short_preamble = false;
300 sdata->vif.bss_conf.use_short_slot = false;
301 return BSS_CHANGED_ERP_CTS_PROT |
302 BSS_CHANGED_ERP_PREAMBLE |
303 BSS_CHANGED_ERP_SLOT;
306 static void ieee80211_tasklet_handler(struct tasklet_struct *t)
308 struct ieee80211_local *local = from_tasklet(local, t, tasklet);
311 while ((skb = skb_dequeue(&local->skb_queue)) ||
312 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
313 switch (skb->pkt_type) {
314 case IEEE80211_RX_MSG:
315 /* Clear skb->pkt_type in order to not confuse kernel
318 ieee80211_rx(&local->hw, skb);
320 case IEEE80211_TX_STATUS_MSG:
322 ieee80211_tx_status_skb(&local->hw, skb);
325 WARN(1, "mac80211: Packet is of unknown type %d\n",
333 static void ieee80211_restart_work(struct work_struct *work)
335 struct ieee80211_local *local =
336 container_of(work, struct ieee80211_local, restart_work);
337 struct ieee80211_sub_if_data *sdata;
340 flush_workqueue(local->workqueue);
343 /* we might do interface manipulations, so need both */
344 wiphy_lock(local->hw.wiphy);
345 wiphy_work_flush(local->hw.wiphy, NULL);
347 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
348 "%s called with hardware scan in progress\n", __func__);
350 list_for_each_entry(sdata, &local->interfaces, list) {
352 * XXX: there may be more work for other vif types and even
353 * for station mode: a good thing would be to run most of
354 * the iface type's dependent _stop (ieee80211_mg_stop,
355 * ieee80211_ibss_stop) etc...
356 * For now, fix only the specific bug that was seen: race
357 * between csa_connection_drop_work and us.
359 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
361 * This worker is scheduled from the iface worker that
362 * runs on mac80211's workqueue, so we can't be
363 * scheduling this worker after the cancel right here.
364 * The exception is ieee80211_chswitch_done.
365 * Then we can have a race...
367 wiphy_work_cancel(local->hw.wiphy,
368 &sdata->u.mgd.csa_connection_drop_work);
369 if (sdata->vif.bss_conf.csa_active)
370 ieee80211_sta_connection_lost(sdata,
371 WLAN_REASON_UNSPECIFIED,
374 wiphy_delayed_work_flush(local->hw.wiphy,
375 &sdata->dec_tailroom_needed_wk);
377 ieee80211_scan_cancel(local);
379 /* make sure any new ROC will consider local->in_reconfig */
380 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work);
381 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done);
383 /* wait for all packet processing to be done */
386 ret = ieee80211_reconfig(local);
387 wiphy_unlock(local->hw.wiphy);
390 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
395 void ieee80211_restart_hw(struct ieee80211_hw *hw)
397 struct ieee80211_local *local = hw_to_local(hw);
399 trace_api_restart_hw(local);
401 wiphy_info(hw->wiphy,
402 "Hardware restart was requested\n");
404 /* use this reason, ieee80211_reconfig will unblock it */
405 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
406 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
410 * Stop all Rx during the reconfig. We don't want state changes
411 * or driver callbacks while this is in progress.
413 local->in_reconfig = true;
416 queue_work(system_freezable_wq, &local->restart_work);
418 EXPORT_SYMBOL(ieee80211_restart_hw);
421 static int ieee80211_ifa_changed(struct notifier_block *nb,
422 unsigned long data, void *arg)
424 struct in_ifaddr *ifa = arg;
425 struct ieee80211_local *local =
426 container_of(nb, struct ieee80211_local,
428 struct net_device *ndev = ifa->ifa_dev->dev;
429 struct wireless_dev *wdev = ndev->ieee80211_ptr;
430 struct in_device *idev;
431 struct ieee80211_sub_if_data *sdata;
432 struct ieee80211_vif_cfg *vif_cfg;
433 struct ieee80211_if_managed *ifmgd;
436 /* Make sure it's our interface that got changed */
440 if (wdev->wiphy != local->hw.wiphy || !wdev->registered)
443 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
444 vif_cfg = &sdata->vif.cfg;
446 /* ARP filtering is only supported in managed mode */
447 if (sdata->vif.type != NL80211_IFTYPE_STATION)
450 idev = __in_dev_get_rtnl(sdata->dev);
454 ifmgd = &sdata->u.mgd;
457 * The nested here is needed to convince lockdep that this is
458 * all OK. Yes, we lock the wiphy mutex here while we already
459 * hold the notifier rwsem, that's the normal case. And yes,
460 * we also acquire the notifier rwsem again when unregistering
461 * a netdev while we already hold the wiphy mutex, so it does
462 * look like a typical ABBA deadlock.
464 * However, both of these things happen with the RTNL held
465 * already. Therefore, they can't actually happen, since the
466 * lock orders really are ABC and ACB, which is fine due to
469 * We still need to prevent recursion, which is accomplished
470 * by the !wdev->registered check above.
472 mutex_lock_nested(&local->hw.wiphy->mtx, 1);
473 __acquire(&local->hw.wiphy->mtx);
475 /* Copy the addresses to the vif config list */
476 ifa = rtnl_dereference(idev->ifa_list);
478 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
479 vif_cfg->arp_addr_list[c] = ifa->ifa_address;
480 ifa = rtnl_dereference(ifa->ifa_next);
484 vif_cfg->arp_addr_cnt = c;
486 /* Configure driver only if associated (which also implies it is up) */
487 if (ifmgd->associated)
488 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER);
490 wiphy_unlock(local->hw.wiphy);
496 #if IS_ENABLED(CONFIG_IPV6)
497 static int ieee80211_ifa6_changed(struct notifier_block *nb,
498 unsigned long data, void *arg)
500 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
501 struct inet6_dev *idev = ifa->idev;
502 struct net_device *ndev = ifa->idev->dev;
503 struct ieee80211_local *local =
504 container_of(nb, struct ieee80211_local, ifa6_notifier);
505 struct wireless_dev *wdev = ndev->ieee80211_ptr;
506 struct ieee80211_sub_if_data *sdata;
508 /* Make sure it's our interface that got changed */
509 if (!wdev || wdev->wiphy != local->hw.wiphy)
512 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
515 * For now only support station mode. This is mostly because
516 * doing AP would have to handle AP_VLAN in some way ...
518 if (sdata->vif.type != NL80211_IFTYPE_STATION)
521 drv_ipv6_addr_change(local, sdata, idev);
527 /* There isn't a lot of sense in it, but you can transmit anything you like */
528 static const struct ieee80211_txrx_stypes
529 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
530 [NL80211_IFTYPE_ADHOC] = {
532 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
533 BIT(IEEE80211_STYPE_AUTH >> 4) |
534 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
535 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
537 [NL80211_IFTYPE_STATION] = {
540 * To support Pre Association Security Negotiation (PASN) while
541 * already associated to one AP, allow user space to register to
542 * Rx authentication frames, so that the user space logic would
543 * be able to receive/handle authentication frames from a
544 * different AP as part of PASN.
545 * It is expected that user space would intelligently register
546 * for Rx authentication frames, i.e., only when PASN is used
547 * and configure a match filter only for PASN authentication
548 * algorithm, as otherwise the MLME functionality of mac80211
551 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
552 BIT(IEEE80211_STYPE_AUTH >> 4) |
553 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
555 [NL80211_IFTYPE_AP] = {
557 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
558 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
559 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
560 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
561 BIT(IEEE80211_STYPE_AUTH >> 4) |
562 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
563 BIT(IEEE80211_STYPE_ACTION >> 4),
565 [NL80211_IFTYPE_AP_VLAN] = {
568 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
569 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
570 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
571 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
572 BIT(IEEE80211_STYPE_AUTH >> 4) |
573 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
574 BIT(IEEE80211_STYPE_ACTION >> 4),
576 [NL80211_IFTYPE_P2P_CLIENT] = {
578 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
579 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
581 [NL80211_IFTYPE_P2P_GO] = {
583 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
584 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
585 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
586 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
587 BIT(IEEE80211_STYPE_AUTH >> 4) |
588 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
589 BIT(IEEE80211_STYPE_ACTION >> 4),
591 [NL80211_IFTYPE_MESH_POINT] = {
593 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
594 BIT(IEEE80211_STYPE_AUTH >> 4) |
595 BIT(IEEE80211_STYPE_DEAUTH >> 4),
597 [NL80211_IFTYPE_P2P_DEVICE] = {
599 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
600 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
604 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
605 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
606 IEEE80211_HT_AMPDU_PARM_DENSITY,
608 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
609 IEEE80211_HT_CAP_MAX_AMSDU |
610 IEEE80211_HT_CAP_SGI_20 |
611 IEEE80211_HT_CAP_SGI_40 |
612 IEEE80211_HT_CAP_TX_STBC |
613 IEEE80211_HT_CAP_RX_STBC |
614 IEEE80211_HT_CAP_LDPC_CODING |
615 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
617 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
618 0xff, 0xff, 0xff, 0xff, 0xff, },
622 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
624 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
625 IEEE80211_VHT_CAP_SHORT_GI_80 |
626 IEEE80211_VHT_CAP_SHORT_GI_160 |
627 IEEE80211_VHT_CAP_RXSTBC_MASK |
628 IEEE80211_VHT_CAP_TXSTBC |
629 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
630 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
631 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
632 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
633 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
635 .rx_mcs_map = cpu_to_le16(~0),
636 .tx_mcs_map = cpu_to_le16(~0),
640 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
641 const struct ieee80211_ops *ops,
642 const char *requested_name)
644 struct ieee80211_local *local;
649 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
650 !ops->add_interface || !ops->remove_interface ||
651 !ops->configure_filter || !ops->wake_tx_queue))
654 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
657 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed ||
658 (ops->link_info_changed && ops->bss_info_changed)))
661 /* check all or no channel context operations exist */
662 i = !!ops->add_chanctx + !!ops->remove_chanctx +
663 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
664 !!ops->unassign_vif_chanctx;
665 if (WARN_ON(i != 0 && i != 5))
667 use_chanctx = i == 5;
669 /* Ensure 32-byte alignment of our private data and hw private data.
670 * We use the wiphy priv data for both our ieee80211_local and for
671 * the driver's private data
673 * In memory it'll be like this:
675 * +-------------------------+
677 * +-------------------------+
678 * | struct ieee80211_local |
679 * +-------------------------+
680 * | driver's private data |
681 * +-------------------------+
684 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
686 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
691 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
693 wiphy->privid = mac80211_wiphy_privid;
695 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
696 WIPHY_FLAG_4ADDR_AP |
697 WIPHY_FLAG_4ADDR_STATION |
698 WIPHY_FLAG_REPORTS_OBSS |
699 WIPHY_FLAG_OFFCHAN_TX;
701 if (!use_chanctx || ops->remain_on_channel)
702 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
704 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
705 NL80211_FEATURE_SAE |
706 NL80211_FEATURE_HT_IBSS |
707 NL80211_FEATURE_VIF_TXPOWER |
708 NL80211_FEATURE_MAC_ON_CREATE |
709 NL80211_FEATURE_USERSPACE_MPM |
710 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
711 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
712 wiphy_ext_feature_set(wiphy,
713 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
714 wiphy_ext_feature_set(wiphy,
715 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH);
716 wiphy_ext_feature_set(wiphy,
717 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS);
718 wiphy_ext_feature_set(wiphy,
719 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ);
720 wiphy_ext_feature_set(wiphy,
721 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE);
724 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
725 NL80211_FEATURE_AP_SCAN;
727 * if the driver behaves correctly using the probe request
728 * (template) from mac80211, then both of these should be
729 * supported even with hw scan - but let drivers opt in.
731 wiphy_ext_feature_set(wiphy,
732 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
733 wiphy_ext_feature_set(wiphy,
734 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
738 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
740 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
741 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
743 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
745 local = wiphy_priv(wiphy);
747 if (sta_info_init(local))
750 local->hw.wiphy = wiphy;
752 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
755 local->use_chanctx = use_chanctx;
758 * We need a bit of data queued to build aggregates properly, so
759 * instruct the TCP stack to allow more than a single ms of data
760 * to be queued in the stack. The value is a bit-shift of 1
761 * second, so 7 is ~8ms of queued data. Only affects local TCP
763 * This is the default, anyhow - drivers may need to override it
764 * for local reasons (longer buffers, longer completion time, or
767 local->hw.tx_sk_pacing_shift = 7;
769 /* set up some defaults */
770 local->hw.queues = 1;
771 local->hw.max_rates = 1;
772 local->hw.max_report_rates = 0;
773 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
774 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
775 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
776 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
777 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
778 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
779 IEEE80211_RADIOTAP_MCS_HAVE_GI |
780 IEEE80211_RADIOTAP_MCS_HAVE_BW;
781 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
782 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
783 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
784 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
785 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
786 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
787 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
788 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
790 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
792 wiphy->extended_capabilities = local->ext_capa;
793 wiphy->extended_capabilities_mask = local->ext_capa;
794 wiphy->extended_capabilities_len =
795 ARRAY_SIZE(local->ext_capa);
797 INIT_LIST_HEAD(&local->interfaces);
798 INIT_LIST_HEAD(&local->mon_list);
800 __hw_addr_init(&local->mc_list);
802 mutex_init(&local->iflist_mtx);
803 spin_lock_init(&local->filter_lock);
804 spin_lock_init(&local->rx_path_lock);
805 spin_lock_init(&local->queue_stop_reason_lock);
807 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
808 INIT_LIST_HEAD(&local->active_txqs[i]);
809 spin_lock_init(&local->active_txq_lock[i]);
810 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L;
811 local->aql_txq_limit_high[i] =
812 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H;
813 atomic_set(&local->aql_ac_pending_airtime[i], 0);
816 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX;
817 local->aql_threshold = IEEE80211_AQL_THRESHOLD;
818 atomic_set(&local->aql_total_pending_airtime, 0);
820 spin_lock_init(&local->handle_wake_tx_queue_lock);
822 INIT_LIST_HEAD(&local->chanctx_list);
824 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work);
826 INIT_WORK(&local->restart_work, ieee80211_restart_work);
828 wiphy_work_init(&local->radar_detected_work,
829 ieee80211_dfs_radar_detected_work);
831 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter);
832 local->smps_mode = IEEE80211_SMPS_OFF;
834 wiphy_work_init(&local->dynamic_ps_enable_work,
835 ieee80211_dynamic_ps_enable_work);
836 wiphy_work_init(&local->dynamic_ps_disable_work,
837 ieee80211_dynamic_ps_disable_work);
838 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
840 wiphy_work_init(&local->sched_scan_stopped_work,
841 ieee80211_sched_scan_stopped_work);
843 spin_lock_init(&local->ack_status_lock);
844 idr_init(&local->ack_status_frames);
846 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
847 skb_queue_head_init(&local->pending[i]);
848 atomic_set(&local->agg_queue_stop[i], 0);
850 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending);
851 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs);
852 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler);
854 skb_queue_head_init(&local->skb_queue);
855 skb_queue_head_init(&local->skb_queue_unreliable);
857 ieee80211_alloc_led_names(local);
859 ieee80211_roc_setup(local);
861 local->hw.radiotap_timestamp.units_pos = -1;
862 local->hw.radiotap_timestamp.accuracy = -1;
869 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
871 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
873 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */
874 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
877 static const u32 cipher_suites[] = {
878 /* keep WEP first, it may be removed below */
879 WLAN_CIPHER_SUITE_WEP40,
880 WLAN_CIPHER_SUITE_WEP104,
881 WLAN_CIPHER_SUITE_TKIP,
882 WLAN_CIPHER_SUITE_CCMP,
883 WLAN_CIPHER_SUITE_CCMP_256,
884 WLAN_CIPHER_SUITE_GCMP,
885 WLAN_CIPHER_SUITE_GCMP_256,
887 /* keep last -- depends on hw flags! */
888 WLAN_CIPHER_SUITE_AES_CMAC,
889 WLAN_CIPHER_SUITE_BIP_CMAC_256,
890 WLAN_CIPHER_SUITE_BIP_GMAC_128,
891 WLAN_CIPHER_SUITE_BIP_GMAC_256,
894 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
895 local->hw.wiphy->cipher_suites) {
896 /* If the driver advertises, or doesn't support SW crypto,
897 * we only need to remove WEP if necessary.
902 /* well if it has _no_ ciphers ... fine */
903 if (!local->hw.wiphy->n_cipher_suites)
906 /* Driver provides cipher suites, but we need to exclude WEP */
907 suites = kmemdup(local->hw.wiphy->cipher_suites,
908 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
913 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
914 u32 suite = local->hw.wiphy->cipher_suites[r];
916 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
917 suite == WLAN_CIPHER_SUITE_WEP104)
922 /* assign the (software supported and perhaps offloaded)
925 local->hw.wiphy->cipher_suites = cipher_suites;
926 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
929 local->hw.wiphy->n_cipher_suites -= 4;
932 local->hw.wiphy->cipher_suites += 2;
933 local->hw.wiphy->n_cipher_suites -= 2;
936 /* not dynamically allocated, so just return */
940 local->hw.wiphy->cipher_suites = suites;
941 local->hw.wiphy->n_cipher_suites = w;
942 local->wiphy_ciphers_allocated = true;
947 int ieee80211_register_hw(struct ieee80211_hw *hw)
949 struct ieee80211_local *local = hw_to_local(hw);
951 enum nl80211_band band;
952 int channels, max_bitrates;
953 bool supp_ht, supp_vht, supp_he, supp_eht;
954 struct cfg80211_chan_def dflt_chandef = {};
956 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
957 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
958 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
961 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
962 (!local->ops->tdls_channel_switch ||
963 !local->ops->tdls_cancel_channel_switch ||
964 !local->ops->tdls_recv_channel_switch))
967 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
968 !local->ops->set_frag_threshold))
971 if (WARN_ON(local->hw.wiphy->interface_modes &
972 BIT(NL80211_IFTYPE_NAN) &&
973 (!local->ops->start_nan || !local->ops->stop_nan)))
976 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
978 * For drivers capable of doing MLO, assume modern driver
979 * or firmware facilities, so software doesn't have to do
980 * as much, e.g. monitoring beacons would be hard if we
981 * might not even know which link is active at which time.
983 if (WARN_ON(!local->use_chanctx))
986 if (WARN_ON(!local->ops->link_info_changed))
989 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
992 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
995 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
998 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
999 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) ||
1000 ieee80211_hw_check(hw, PS_NULLFUNC_STACK))))
1003 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
1006 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
1009 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
1012 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
1015 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
1018 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP)))
1023 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
1027 if (!local->use_chanctx) {
1028 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1029 const struct ieee80211_iface_combination *comb;
1031 comb = &local->hw.wiphy->iface_combinations[i];
1033 if (comb->num_different_channels > 1)
1037 /* DFS is not supported with multi-channel combinations yet */
1038 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
1039 const struct ieee80211_iface_combination *comb;
1041 comb = &local->hw.wiphy->iface_combinations[i];
1043 if (comb->radar_detect_widths &&
1044 comb->num_different_channels > 1)
1049 /* Only HW csum features are currently compatible with mac80211 */
1050 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES))
1053 if (hw->max_report_rates == 0)
1054 hw->max_report_rates = hw->max_rates;
1056 local->rx_chains = 1;
1059 * generic code guarantees at least one band,
1060 * set this very early because much code assumes
1061 * that hw.conf.channel is assigned
1069 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1070 const struct ieee80211_sband_iftype_data *iftd;
1071 struct ieee80211_supported_band *sband;
1073 sband = local->hw.wiphy->bands[band];
1077 if (!dflt_chandef.chan) {
1079 * Assign the first enabled channel to dflt_chandef
1080 * from the list of channels
1082 for (i = 0; i < sband->n_channels; i++)
1083 if (!(sband->channels[i].flags &
1084 IEEE80211_CHAN_DISABLED))
1086 /* if none found then use the first anyway */
1087 if (i == sband->n_channels)
1089 cfg80211_chandef_create(&dflt_chandef,
1090 &sband->channels[i],
1091 NL80211_CHAN_NO_HT);
1092 /* init channel we're on */
1093 if (!local->use_chanctx && !local->_oper_chandef.chan) {
1094 local->hw.conf.chandef = dflt_chandef;
1095 local->_oper_chandef = dflt_chandef;
1097 local->monitor_chandef = dflt_chandef;
1100 channels += sband->n_channels;
1103 * Due to the way the aggregation code handles this and it
1104 * being an HT capability, we can't really support delayed
1107 if (WARN_ON(sband->ht_cap.ht_supported &&
1108 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) &&
1109 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
1112 if (max_bitrates < sband->n_bitrates)
1113 max_bitrates = sband->n_bitrates;
1114 supp_ht = supp_ht || sband->ht_cap.ht_supported;
1115 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1117 for_each_sband_iftype_data(sband, i, iftd) {
1118 supp_he = supp_he || iftd->he_cap.has_he;
1119 supp_eht = supp_eht || iftd->eht_cap.has_eht;
1122 /* HT, VHT, HE require QoS, thus >= 4 queues */
1123 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS &&
1124 (supp_ht || supp_vht || supp_he)))
1127 /* EHT requires HE support */
1128 if (WARN_ON(supp_eht && !supp_he))
1131 if (!sband->ht_cap.ht_supported)
1134 /* TODO: consider VHT for RX chains, hopefully it's the same */
1136 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
1139 /* no need to mask, SM_PS_DISABLED has all bits set */
1140 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
1141 IEEE80211_HT_CAP_SM_PS_SHIFT;
1144 /* if low-level driver supports AP, we also support VLAN.
1145 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
1146 * based on their support to transmit SW encrypted packets.
1148 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
1149 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
1150 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1151 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
1154 /* mac80211 always supports monitor */
1155 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1156 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
1158 /* mac80211 doesn't support more than one IBSS interface right now */
1159 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
1160 const struct ieee80211_iface_combination *c;
1163 c = &hw->wiphy->iface_combinations[i];
1165 for (j = 0; j < c->n_limits; j++)
1166 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
1167 c->limits[j].max > 1)
1171 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
1172 sizeof(void *) * channels, GFP_KERNEL);
1173 if (!local->int_scan_req)
1176 eth_broadcast_addr(local->int_scan_req->bssid);
1178 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1179 if (!local->hw.wiphy->bands[band])
1181 local->int_scan_req->rates[band] = (u32) -1;
1184 #ifndef CONFIG_MAC80211_MESH
1185 /* mesh depends on Kconfig, but drivers should set it if they want */
1186 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
1189 /* if the underlying driver supports mesh, mac80211 will (at least)
1190 * provide routing of mesh authentication frames to userspace */
1191 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
1192 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1194 /* mac80211 supports control port protocol changing */
1195 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1197 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1198 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1199 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1200 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1201 if (hw->max_signal <= 0) {
1203 goto fail_workqueue;
1207 /* Mac80211 and therefore all drivers using SW crypto only
1208 * are able to handle PTK rekeys and Extended Key ID.
1210 if (!local->ops->set_key) {
1211 wiphy_ext_feature_set(local->hw.wiphy,
1212 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
1213 wiphy_ext_feature_set(local->hw.wiphy,
1214 NL80211_EXT_FEATURE_EXT_KEY_ID);
1217 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC))
1218 wiphy_ext_feature_set(local->hw.wiphy,
1219 NL80211_EXT_FEATURE_DEL_IBSS_STA);
1222 * Calculate scan IE length -- we need this to alloc
1223 * memory and to subtract from the driver limit. It
1224 * includes the DS Params, (extended) supported rates, and HT
1225 * information -- SSID is the driver's responsibility.
1227 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1230 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1233 local->scan_ies_len +=
1234 2 + sizeof(struct ieee80211_vht_cap);
1237 * HE cap element is variable in size - set len to allow max size */
1239 local->scan_ies_len +=
1240 3 + sizeof(struct ieee80211_he_cap_elem) +
1241 sizeof(struct ieee80211_he_mcs_nss_supp) +
1242 IEEE80211_HE_PPE_THRES_MAX_LEN;
1245 local->scan_ies_len +=
1246 3 + sizeof(struct ieee80211_eht_cap_elem) +
1247 sizeof(struct ieee80211_eht_mcs_nss_supp) +
1248 IEEE80211_EHT_PPE_THRES_MAX_LEN;
1251 if (!local->ops->hw_scan) {
1252 /* For hw_scan, driver needs to set these up. */
1253 local->hw.wiphy->max_scan_ssids = 4;
1254 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1258 * If the driver supports any scan IEs, then assume the
1259 * limit includes the IEs mac80211 will add, otherwise
1260 * leave it at zero and let the driver sort it out; we
1261 * still pass our IEs to the driver but userspace will
1262 * not be allowed to in that case.
1264 if (local->hw.wiphy->max_scan_ie_len)
1265 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1267 result = ieee80211_init_cipher_suites(local);
1269 goto fail_workqueue;
1271 if (!local->ops->remain_on_channel)
1272 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1274 /* mac80211 based drivers don't support internal TDLS setup */
1275 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1276 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1278 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1279 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1280 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1282 /* mac80211 supports multi BSSID, if the driver supports it */
1283 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) {
1284 local->hw.wiphy->support_mbssid = true;
1285 if (ieee80211_hw_check(&local->hw,
1286 SUPPORTS_ONLY_HE_MULTI_BSSID))
1287 local->hw.wiphy->support_only_he_mbssid = true;
1289 local->ext_capa[2] |=
1290 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT;
1293 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
1296 * We use the number of queues for feature tests (QoS, HT) internally
1297 * so restrict them appropriately.
1299 if (hw->queues > IEEE80211_MAX_QUEUES)
1300 hw->queues = IEEE80211_MAX_QUEUES;
1303 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1304 if (!local->workqueue) {
1306 goto fail_workqueue;
1310 * The hardware needs headroom for sending the frame,
1311 * and we need some headroom for passing the frame to monitor
1312 * interfaces, but never both at the same time.
1314 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1315 IEEE80211_TX_STATUS_HEADROOM);
1318 * if the driver doesn't specify a max listen interval we
1319 * use 5 which should be a safe default
1321 if (local->hw.max_listen_interval == 0)
1322 local->hw.max_listen_interval = 5;
1324 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1326 local->dynamic_ps_forced_timeout = -1;
1328 if (!local->hw.max_nan_de_entries)
1329 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1331 if (!local->hw.weight_multiplier)
1332 local->hw.weight_multiplier = 1;
1334 ieee80211_wep_init(local);
1336 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1338 ieee80211_led_init(local);
1340 result = ieee80211_txq_setup_flows(local);
1345 result = ieee80211_init_rate_ctrl_alg(local,
1346 hw->rate_control_algorithm);
1349 wiphy_debug(local->hw.wiphy,
1350 "Failed to initialize rate control algorithm\n");
1354 if (local->rate_ctrl) {
1355 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags);
1356 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW)
1357 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
1361 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE,
1362 * or have it when we don't, copy the sband structure and set/clear it.
1363 * This is necessary because rate scaling algorithms could be switched
1364 * and have different support values.
1365 * Print a message so that in the common case the reallocation can be
1368 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated));
1369 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1370 struct ieee80211_supported_band *sband;
1371 bool local_cap, ie_cap;
1373 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW);
1375 sband = local->hw.wiphy->bands[band];
1376 if (!sband || !sband->vht_cap.vht_supported)
1379 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest &
1380 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE));
1382 if (local_cap == ie_cap)
1385 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL);
1391 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n",
1394 sband->vht_cap.vht_mcs.tx_highest ^=
1395 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
1397 local->hw.wiphy->bands[band] = sband;
1398 local->sband_allocated |= BIT(band);
1401 result = wiphy_register(local->hw.wiphy);
1403 goto fail_wiphy_register;
1405 debugfs_hw_add(local);
1406 rate_control_add_debugfs(local);
1408 ieee80211_check_wbrf_support(local);
1411 wiphy_lock(hw->wiphy);
1413 /* add one default STA interface if supported */
1414 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1415 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1416 struct vif_params params = {0};
1418 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1419 NL80211_IFTYPE_STATION, ¶ms);
1421 wiphy_warn(local->hw.wiphy,
1422 "Failed to add default virtual iface\n");
1425 wiphy_unlock(hw->wiphy);
1429 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1430 result = register_inetaddr_notifier(&local->ifa_notifier);
1435 #if IS_ENABLED(CONFIG_IPV6)
1436 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1437 result = register_inet6addr_notifier(&local->ifa6_notifier);
1444 #if IS_ENABLED(CONFIG_IPV6)
1447 unregister_inetaddr_notifier(&local->ifa_notifier);
1450 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1453 wiphy_unregister(local->hw.wiphy);
1454 fail_wiphy_register:
1456 rate_control_deinitialize(local);
1457 ieee80211_remove_interfaces(local);
1460 ieee80211_txq_teardown_flows(local);
1462 ieee80211_led_exit(local);
1463 destroy_workqueue(local->workqueue);
1465 if (local->wiphy_ciphers_allocated) {
1466 kfree(local->hw.wiphy->cipher_suites);
1467 local->wiphy_ciphers_allocated = false;
1469 kfree(local->int_scan_req);
1472 EXPORT_SYMBOL(ieee80211_register_hw);
1474 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1476 struct ieee80211_local *local = hw_to_local(hw);
1478 tasklet_kill(&local->tx_pending_tasklet);
1479 tasklet_kill(&local->tasklet);
1482 unregister_inetaddr_notifier(&local->ifa_notifier);
1484 #if IS_ENABLED(CONFIG_IPV6)
1485 unregister_inet6addr_notifier(&local->ifa6_notifier);
1491 * At this point, interface list manipulations are fine
1492 * because the driver cannot be handing us frames any
1493 * more and the tasklet is killed.
1495 ieee80211_remove_interfaces(local);
1497 ieee80211_txq_teardown_flows(local);
1499 wiphy_lock(local->hw.wiphy);
1500 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
1501 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1502 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
1503 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
1504 wiphy_unlock(local->hw.wiphy);
1507 cancel_work_sync(&local->restart_work);
1509 ieee80211_clear_tx_pending(local);
1510 rate_control_deinitialize(local);
1512 if (skb_queue_len(&local->skb_queue) ||
1513 skb_queue_len(&local->skb_queue_unreliable))
1514 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1515 skb_queue_purge(&local->skb_queue);
1516 skb_queue_purge(&local->skb_queue_unreliable);
1518 wiphy_unregister(local->hw.wiphy);
1519 destroy_workqueue(local->workqueue);
1520 ieee80211_led_exit(local);
1521 kfree(local->int_scan_req);
1523 EXPORT_SYMBOL(ieee80211_unregister_hw);
1525 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1527 WARN_ONCE(1, "Have pending ack frames!\n");
1532 void ieee80211_free_hw(struct ieee80211_hw *hw)
1534 struct ieee80211_local *local = hw_to_local(hw);
1535 enum nl80211_band band;
1537 mutex_destroy(&local->iflist_mtx);
1539 if (local->wiphy_ciphers_allocated) {
1540 kfree(local->hw.wiphy->cipher_suites);
1541 local->wiphy_ciphers_allocated = false;
1544 idr_for_each(&local->ack_status_frames,
1545 ieee80211_free_ack_frame, NULL);
1546 idr_destroy(&local->ack_status_frames);
1548 sta_info_stop(local);
1550 ieee80211_free_led_names(local);
1552 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1553 if (!(local->sband_allocated & BIT(band)))
1555 kfree(local->hw.wiphy->bands[band]);
1558 wiphy_free(local->hw.wiphy);
1560 EXPORT_SYMBOL(ieee80211_free_hw);
1562 static const char * const drop_reasons_monitor[] = {
1564 [0] = "RX_DROP_MONITOR",
1565 MAC80211_DROP_REASONS_MONITOR(V)
1568 static struct drop_reason_list drop_reason_list_monitor = {
1569 .reasons = drop_reasons_monitor,
1570 .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
1573 static const char * const drop_reasons_unusable[] = {
1574 [0] = "RX_DROP_UNUSABLE",
1575 MAC80211_DROP_REASONS_UNUSABLE(V)
1579 static struct drop_reason_list drop_reason_list_unusable = {
1580 .reasons = drop_reasons_unusable,
1581 .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
1584 static int __init ieee80211_init(void)
1586 struct sk_buff *skb;
1589 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1590 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1591 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1593 ret = rc80211_minstrel_init();
1597 ret = ieee80211_iface_init();
1601 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
1602 &drop_reason_list_monitor);
1603 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
1604 &drop_reason_list_unusable);
1608 rc80211_minstrel_exit();
1613 static void __exit ieee80211_exit(void)
1615 rc80211_minstrel_exit();
1619 ieee80211_iface_exit();
1621 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
1622 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
1628 subsys_initcall(ieee80211_init);
1629 module_exit(ieee80211_exit);
1631 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1632 MODULE_LICENSE("GPL");