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
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <net/mac80211.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/netdevice.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <linux/inetdevice.h>
25 #include <net/net_namespace.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 spin_lock_bh(&local->filter_lock);
69 changed_flags = local->filter_flags ^ new_flags;
71 mc = drv_prepare_multicast(local, &local->mc_list);
72 spin_unlock_bh(&local->filter_lock);
77 drv_configure_filter(local, changed_flags, &new_flags, mc);
79 WARN_ON(new_flags & (1<<31));
81 local->filter_flags = new_flags & ~(1<<31);
84 static void ieee80211_reconfig_filter(struct work_struct *work)
86 struct ieee80211_local *local =
87 container_of(work, struct ieee80211_local, reconfig_filter);
89 ieee80211_configure_filter(local);
92 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
94 struct ieee80211_sub_if_data *sdata;
95 struct cfg80211_chan_def chandef = {};
100 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
102 if (local->scan_chandef.chan) {
103 chandef = local->scan_chandef;
104 } else if (local->tmp_channel) {
105 chandef.chan = local->tmp_channel;
106 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
107 chandef.center_freq1 = chandef.chan->center_freq;
109 chandef = local->_oper_chandef;
111 WARN(!cfg80211_chandef_valid(&chandef),
112 "control:%d MHz width:%d center: %d/%d MHz",
113 chandef.chan->center_freq, chandef.width,
114 chandef.center_freq1, chandef.center_freq2);
116 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
117 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
119 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
121 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
123 if (offchannel_flag ||
124 !cfg80211_chandef_identical(&local->hw.conf.chandef,
125 &local->_oper_chandef)) {
126 local->hw.conf.chandef = chandef;
127 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
130 if (!conf_is_ht(&local->hw.conf)) {
132 * mac80211.h documents that this is only valid
133 * when the channel is set to an HT type, and
134 * that otherwise STATIC is used.
136 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
137 } else if (local->hw.conf.smps_mode != local->smps_mode) {
138 local->hw.conf.smps_mode = local->smps_mode;
139 changed |= IEEE80211_CONF_CHANGE_SMPS;
142 power = ieee80211_chandef_max_power(&chandef);
145 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
146 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
148 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
150 power = min(power, sdata->vif.bss_conf.txpower);
154 if (local->hw.conf.power_level != power) {
155 changed |= IEEE80211_CONF_CHANGE_POWER;
156 local->hw.conf.power_level = power;
162 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
168 if (!local->use_chanctx)
169 changed |= ieee80211_hw_conf_chan(local);
171 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
172 IEEE80211_CONF_CHANGE_POWER);
174 if (changed && local->open_count) {
175 ret = drv_config(local, changed);
178 * HW reconfiguration should never fail, the driver has told
179 * us what it can support so it should live up to that promise.
182 * rfkill is not integrated with mac80211 and a
183 * configuration command can thus fail if hardware rfkill
186 * FIXME: integrate rfkill with mac80211 and then add this
196 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
199 struct ieee80211_local *local = sdata->local;
201 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
204 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
207 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
209 sdata->vif.bss_conf.use_cts_prot = false;
210 sdata->vif.bss_conf.use_short_preamble = false;
211 sdata->vif.bss_conf.use_short_slot = false;
212 return BSS_CHANGED_ERP_CTS_PROT |
213 BSS_CHANGED_ERP_PREAMBLE |
214 BSS_CHANGED_ERP_SLOT;
217 static void ieee80211_tasklet_handler(unsigned long data)
219 struct ieee80211_local *local = (struct ieee80211_local *) data;
222 while ((skb = skb_dequeue(&local->skb_queue)) ||
223 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
224 switch (skb->pkt_type) {
225 case IEEE80211_RX_MSG:
226 /* Clear skb->pkt_type in order to not confuse kernel
229 ieee80211_rx(&local->hw, skb);
231 case IEEE80211_TX_STATUS_MSG:
233 ieee80211_tx_status(&local->hw, skb);
236 WARN(1, "mac80211: Packet is of unknown type %d\n",
244 static void ieee80211_restart_work(struct work_struct *work)
246 struct ieee80211_local *local =
247 container_of(work, struct ieee80211_local, restart_work);
248 struct ieee80211_sub_if_data *sdata;
250 /* wait for scan work complete */
251 flush_workqueue(local->workqueue);
252 flush_work(&local->sched_scan_stopped_work);
254 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
255 "%s called with hardware scan in progress\n", __func__);
257 flush_work(&local->radar_detected_work);
259 list_for_each_entry(sdata, &local->interfaces, list)
260 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
261 ieee80211_scan_cancel(local);
263 /* make sure any new ROC will consider local->in_reconfig */
264 flush_delayed_work(&local->roc_work);
265 flush_work(&local->hw_roc_done);
267 /* wait for all packet processing to be done */
270 ieee80211_reconfig(local);
274 void ieee80211_restart_hw(struct ieee80211_hw *hw)
276 struct ieee80211_local *local = hw_to_local(hw);
278 trace_api_restart_hw(local);
280 wiphy_info(hw->wiphy,
281 "Hardware restart was requested\n");
283 /* use this reason, ieee80211_reconfig will unblock it */
284 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
285 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
289 * Stop all Rx during the reconfig. We don't want state changes
290 * or driver callbacks while this is in progress.
292 local->in_reconfig = true;
295 queue_work(system_freezable_wq, &local->restart_work);
297 EXPORT_SYMBOL(ieee80211_restart_hw);
300 static int ieee80211_ifa_changed(struct notifier_block *nb,
301 unsigned long data, void *arg)
303 struct in_ifaddr *ifa = arg;
304 struct ieee80211_local *local =
305 container_of(nb, struct ieee80211_local,
307 struct net_device *ndev = ifa->ifa_dev->dev;
308 struct wireless_dev *wdev = ndev->ieee80211_ptr;
309 struct in_device *idev;
310 struct ieee80211_sub_if_data *sdata;
311 struct ieee80211_bss_conf *bss_conf;
312 struct ieee80211_if_managed *ifmgd;
315 /* Make sure it's our interface that got changed */
319 if (wdev->wiphy != local->hw.wiphy)
322 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
323 bss_conf = &sdata->vif.bss_conf;
325 /* ARP filtering is only supported in managed mode */
326 if (sdata->vif.type != NL80211_IFTYPE_STATION)
329 idev = __in_dev_get_rtnl(sdata->dev);
333 ifmgd = &sdata->u.mgd;
336 /* Copy the addresses to the bss_conf list */
337 ifa = idev->ifa_list;
339 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
340 bss_conf->arp_addr_list[c] = ifa->ifa_address;
345 bss_conf->arp_addr_cnt = c;
347 /* Configure driver only if associated (which also implies it is up) */
348 if (ifmgd->associated)
349 ieee80211_bss_info_change_notify(sdata,
350 BSS_CHANGED_ARP_FILTER);
358 #if IS_ENABLED(CONFIG_IPV6)
359 static int ieee80211_ifa6_changed(struct notifier_block *nb,
360 unsigned long data, void *arg)
362 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
363 struct inet6_dev *idev = ifa->idev;
364 struct net_device *ndev = ifa->idev->dev;
365 struct ieee80211_local *local =
366 container_of(nb, struct ieee80211_local, ifa6_notifier);
367 struct wireless_dev *wdev = ndev->ieee80211_ptr;
368 struct ieee80211_sub_if_data *sdata;
370 /* Make sure it's our interface that got changed */
371 if (!wdev || wdev->wiphy != local->hw.wiphy)
374 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
377 * For now only support station mode. This is mostly because
378 * doing AP would have to handle AP_VLAN in some way ...
380 if (sdata->vif.type != NL80211_IFTYPE_STATION)
383 drv_ipv6_addr_change(local, sdata, idev);
389 /* There isn't a lot of sense in it, but you can transmit anything you like */
390 static const struct ieee80211_txrx_stypes
391 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
392 [NL80211_IFTYPE_ADHOC] = {
394 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
395 BIT(IEEE80211_STYPE_AUTH >> 4) |
396 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
399 [NL80211_IFTYPE_STATION] = {
401 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
402 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
404 [NL80211_IFTYPE_AP] = {
406 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
407 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
408 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
409 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
410 BIT(IEEE80211_STYPE_AUTH >> 4) |
411 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
412 BIT(IEEE80211_STYPE_ACTION >> 4),
414 [NL80211_IFTYPE_AP_VLAN] = {
417 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
418 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
420 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
421 BIT(IEEE80211_STYPE_AUTH >> 4) |
422 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
423 BIT(IEEE80211_STYPE_ACTION >> 4),
425 [NL80211_IFTYPE_P2P_CLIENT] = {
427 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
428 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
430 [NL80211_IFTYPE_P2P_GO] = {
432 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
433 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
434 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
435 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
436 BIT(IEEE80211_STYPE_AUTH >> 4) |
437 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
438 BIT(IEEE80211_STYPE_ACTION >> 4),
440 [NL80211_IFTYPE_MESH_POINT] = {
442 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
443 BIT(IEEE80211_STYPE_AUTH >> 4) |
444 BIT(IEEE80211_STYPE_DEAUTH >> 4),
446 [NL80211_IFTYPE_P2P_DEVICE] = {
448 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
449 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
453 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
454 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
455 IEEE80211_HT_AMPDU_PARM_DENSITY,
457 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
458 IEEE80211_HT_CAP_MAX_AMSDU |
459 IEEE80211_HT_CAP_SGI_20 |
460 IEEE80211_HT_CAP_SGI_40 |
461 IEEE80211_HT_CAP_LDPC_CODING |
462 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
464 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
465 0xff, 0xff, 0xff, 0xff, 0xff, },
469 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
471 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
472 IEEE80211_VHT_CAP_SHORT_GI_80 |
473 IEEE80211_VHT_CAP_SHORT_GI_160 |
474 IEEE80211_VHT_CAP_RXSTBC_1 |
475 IEEE80211_VHT_CAP_RXSTBC_2 |
476 IEEE80211_VHT_CAP_RXSTBC_3 |
477 IEEE80211_VHT_CAP_RXSTBC_4 |
478 IEEE80211_VHT_CAP_TXSTBC |
479 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
480 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
481 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
482 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
483 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
485 .rx_mcs_map = cpu_to_le16(~0),
486 .tx_mcs_map = cpu_to_le16(~0),
490 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
491 const struct ieee80211_ops *ops,
492 const char *requested_name)
494 struct ieee80211_local *local;
499 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
500 !ops->add_interface || !ops->remove_interface ||
501 !ops->configure_filter))
504 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
507 /* check all or no channel context operations exist */
508 i = !!ops->add_chanctx + !!ops->remove_chanctx +
509 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
510 !!ops->unassign_vif_chanctx;
511 if (WARN_ON(i != 0 && i != 5))
513 use_chanctx = i == 5;
515 /* Ensure 32-byte alignment of our private data and hw private data.
516 * We use the wiphy priv data for both our ieee80211_local and for
517 * the driver's private data
519 * In memory it'll be like this:
521 * +-------------------------+
523 * +-------------------------+
524 * | struct ieee80211_local |
525 * +-------------------------+
526 * | driver's private data |
527 * +-------------------------+
530 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
532 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
537 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
539 wiphy->privid = mac80211_wiphy_privid;
541 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
542 WIPHY_FLAG_4ADDR_AP |
543 WIPHY_FLAG_4ADDR_STATION |
544 WIPHY_FLAG_REPORTS_OBSS |
545 WIPHY_FLAG_OFFCHAN_TX;
547 if (ops->remain_on_channel)
548 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
550 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
551 NL80211_FEATURE_SAE |
552 NL80211_FEATURE_HT_IBSS |
553 NL80211_FEATURE_VIF_TXPOWER |
554 NL80211_FEATURE_MAC_ON_CREATE |
555 NL80211_FEATURE_USERSPACE_MPM |
556 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
557 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA);
558 wiphy_ext_feature_set(wiphy,
559 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211);
562 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
563 NL80211_FEATURE_AP_SCAN;
565 * if the driver behaves correctly using the probe request
566 * (template) from mac80211, then both of these should be
567 * supported even with hw scan - but let drivers opt in.
569 wiphy_ext_feature_set(wiphy,
570 NL80211_EXT_FEATURE_SCAN_RANDOM_SN);
571 wiphy_ext_feature_set(wiphy,
572 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT);
576 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
578 if (ops->wake_tx_queue)
579 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS);
581 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
583 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
585 local = wiphy_priv(wiphy);
587 if (sta_info_init(local))
590 local->hw.wiphy = wiphy;
592 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
595 local->use_chanctx = use_chanctx;
597 /* set up some defaults */
598 local->hw.queues = 1;
599 local->hw.max_rates = 1;
600 local->hw.max_report_rates = 0;
601 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
602 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT;
603 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
604 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
605 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
606 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
607 IEEE80211_RADIOTAP_MCS_HAVE_GI |
608 IEEE80211_RADIOTAP_MCS_HAVE_BW;
609 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
610 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
611 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
612 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
613 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
614 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
615 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
617 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
619 wiphy->extended_capabilities = local->ext_capa;
620 wiphy->extended_capabilities_mask = local->ext_capa;
621 wiphy->extended_capabilities_len =
622 ARRAY_SIZE(local->ext_capa);
624 INIT_LIST_HEAD(&local->interfaces);
625 INIT_LIST_HEAD(&local->mon_list);
627 __hw_addr_init(&local->mc_list);
629 mutex_init(&local->iflist_mtx);
630 mutex_init(&local->mtx);
632 mutex_init(&local->key_mtx);
633 spin_lock_init(&local->filter_lock);
634 spin_lock_init(&local->rx_path_lock);
635 spin_lock_init(&local->queue_stop_reason_lock);
637 INIT_LIST_HEAD(&local->chanctx_list);
638 mutex_init(&local->chanctx_mtx);
640 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
642 INIT_WORK(&local->restart_work, ieee80211_restart_work);
644 INIT_WORK(&local->radar_detected_work,
645 ieee80211_dfs_radar_detected_work);
647 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
648 local->smps_mode = IEEE80211_SMPS_OFF;
650 INIT_WORK(&local->dynamic_ps_enable_work,
651 ieee80211_dynamic_ps_enable_work);
652 INIT_WORK(&local->dynamic_ps_disable_work,
653 ieee80211_dynamic_ps_disable_work);
654 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
656 INIT_WORK(&local->sched_scan_stopped_work,
657 ieee80211_sched_scan_stopped_work);
659 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
661 spin_lock_init(&local->ack_status_lock);
662 idr_init(&local->ack_status_frames);
664 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
665 skb_queue_head_init(&local->pending[i]);
666 atomic_set(&local->agg_queue_stop[i], 0);
668 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
669 (unsigned long)local);
671 tasklet_init(&local->tasklet,
672 ieee80211_tasklet_handler,
673 (unsigned long) local);
675 skb_queue_head_init(&local->skb_queue);
676 skb_queue_head_init(&local->skb_queue_unreliable);
677 skb_queue_head_init(&local->skb_queue_tdls_chsw);
679 ieee80211_alloc_led_names(local);
681 ieee80211_roc_setup(local);
683 local->hw.radiotap_timestamp.units_pos = -1;
684 local->hw.radiotap_timestamp.accuracy = -1;
691 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
693 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
695 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
696 IS_ERR(local->wep_rx_tfm));
697 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
698 int n_suites = 0, r = 0, w = 0;
700 static const u32 cipher_suites[] = {
701 /* keep WEP first, it may be removed below */
702 WLAN_CIPHER_SUITE_WEP40,
703 WLAN_CIPHER_SUITE_WEP104,
704 WLAN_CIPHER_SUITE_TKIP,
705 WLAN_CIPHER_SUITE_CCMP,
706 WLAN_CIPHER_SUITE_CCMP_256,
707 WLAN_CIPHER_SUITE_GCMP,
708 WLAN_CIPHER_SUITE_GCMP_256,
710 /* keep last -- depends on hw flags! */
711 WLAN_CIPHER_SUITE_AES_CMAC,
712 WLAN_CIPHER_SUITE_BIP_CMAC_256,
713 WLAN_CIPHER_SUITE_BIP_GMAC_128,
714 WLAN_CIPHER_SUITE_BIP_GMAC_256,
717 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
718 local->hw.wiphy->cipher_suites) {
719 /* If the driver advertises, or doesn't support SW crypto,
720 * we only need to remove WEP if necessary.
725 /* well if it has _no_ ciphers ... fine */
726 if (!local->hw.wiphy->n_cipher_suites)
729 /* Driver provides cipher suites, but we need to exclude WEP */
730 suites = kmemdup(local->hw.wiphy->cipher_suites,
731 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
736 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
737 u32 suite = local->hw.wiphy->cipher_suites[r];
739 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
740 suite == WLAN_CIPHER_SUITE_WEP104)
744 } else if (!local->hw.cipher_schemes) {
745 /* If the driver doesn't have cipher schemes, there's nothing
746 * else to do other than assign the (software supported and
747 * perhaps offloaded) cipher suites.
749 local->hw.wiphy->cipher_suites = cipher_suites;
750 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
753 local->hw.wiphy->n_cipher_suites -= 4;
756 local->hw.wiphy->cipher_suites += 2;
757 local->hw.wiphy->n_cipher_suites -= 2;
760 /* not dynamically allocated, so just return */
763 const struct ieee80211_cipher_scheme *cs;
765 cs = local->hw.cipher_schemes;
767 /* Driver specifies cipher schemes only (but not cipher suites
768 * including the schemes)
770 * We start counting ciphers defined by schemes, TKIP, CCMP,
771 * CCMP-256, GCMP, and GCMP-256
773 n_suites = local->hw.n_cipher_schemes + 5;
775 /* check if we have WEP40 and WEP104 */
779 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
785 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL);
789 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
790 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
791 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
792 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
793 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
796 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
797 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
801 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
802 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
803 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
804 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
807 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
808 suites[w++] = cs[r].cipher;
809 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
816 local->hw.wiphy->cipher_suites = suites;
817 local->hw.wiphy->n_cipher_suites = w;
818 local->wiphy_ciphers_allocated = true;
823 int ieee80211_register_hw(struct ieee80211_hw *hw)
825 struct ieee80211_local *local = hw_to_local(hw);
827 enum nl80211_band band;
828 int channels, max_bitrates;
829 bool supp_ht, supp_vht, supp_he;
830 netdev_features_t feature_whitelist;
831 struct cfg80211_chan_def dflt_chandef = {};
833 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
834 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
835 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
838 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
839 (!local->ops->tdls_channel_switch ||
840 !local->ops->tdls_cancel_channel_switch ||
841 !local->ops->tdls_recv_channel_switch))
844 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) &&
845 !local->ops->set_frag_threshold))
848 if (WARN_ON(local->hw.wiphy->interface_modes &
849 BIT(NL80211_IFTYPE_NAN) &&
850 (!local->ops->start_nan || !local->ops->stop_nan)))
854 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
858 if (!local->use_chanctx) {
859 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
860 const struct ieee80211_iface_combination *comb;
862 comb = &local->hw.wiphy->iface_combinations[i];
864 if (comb->num_different_channels > 1)
869 * WDS is currently prohibited when channel contexts are used
870 * because there's no clear definition of which channel WDS
871 * type interfaces use
873 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
876 /* DFS is not supported with multi-channel combinations yet */
877 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
878 const struct ieee80211_iface_combination *comb;
880 comb = &local->hw.wiphy->iface_combinations[i];
882 if (comb->radar_detect_widths &&
883 comb->num_different_channels > 1)
888 /* Only HW csum features are currently compatible with mac80211 */
889 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
890 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
891 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
892 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
895 if (hw->max_report_rates == 0)
896 hw->max_report_rates = hw->max_rates;
898 local->rx_chains = 1;
901 * generic code guarantees at least one band,
902 * set this very early because much code assumes
903 * that hw.conf.channel is assigned
910 for (band = 0; band < NUM_NL80211_BANDS; band++) {
911 struct ieee80211_supported_band *sband;
913 sband = local->hw.wiphy->bands[band];
917 if (!dflt_chandef.chan) {
918 cfg80211_chandef_create(&dflt_chandef,
921 /* init channel we're on */
922 if (!local->use_chanctx && !local->_oper_chandef.chan) {
923 local->hw.conf.chandef = dflt_chandef;
924 local->_oper_chandef = dflt_chandef;
926 local->monitor_chandef = dflt_chandef;
929 channels += sband->n_channels;
931 if (max_bitrates < sband->n_bitrates)
932 max_bitrates = sband->n_bitrates;
933 supp_ht = supp_ht || sband->ht_cap.ht_supported;
934 supp_vht = supp_vht || sband->vht_cap.vht_supported;
937 supp_he = !!ieee80211_get_he_sta_cap(sband);
939 if (!sband->ht_cap.ht_supported)
942 /* TODO: consider VHT for RX chains, hopefully it's the same */
944 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
947 /* no need to mask, SM_PS_DISABLED has all bits set */
948 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
949 IEEE80211_HT_CAP_SM_PS_SHIFT;
952 /* if low-level driver supports AP, we also support VLAN.
953 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN
954 * based on their support to transmit SW encrypted packets.
956 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) &&
957 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) {
958 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
959 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
962 /* mac80211 always supports monitor */
963 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
964 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
966 /* mac80211 doesn't support more than one IBSS interface right now */
967 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
968 const struct ieee80211_iface_combination *c;
971 c = &hw->wiphy->iface_combinations[i];
973 for (j = 0; j < c->n_limits; j++)
974 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
975 c->limits[j].max > 1)
979 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
980 sizeof(void *) * channels, GFP_KERNEL);
981 if (!local->int_scan_req)
984 for (band = 0; band < NUM_NL80211_BANDS; band++) {
985 if (!local->hw.wiphy->bands[band])
987 local->int_scan_req->rates[band] = (u32) -1;
990 #ifndef CONFIG_MAC80211_MESH
991 /* mesh depends on Kconfig, but drivers should set it if they want */
992 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
995 /* if the underlying driver supports mesh, mac80211 will (at least)
996 * provide routing of mesh authentication frames to userspace */
997 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
998 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
1000 /* mac80211 supports control port protocol changing */
1001 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
1003 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
1004 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1005 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1006 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1007 if (hw->max_signal <= 0) {
1009 goto fail_wiphy_register;
1014 * Calculate scan IE length -- we need this to alloc
1015 * memory and to subtract from the driver limit. It
1016 * includes the DS Params, (extended) supported rates, and HT
1017 * information -- SSID is the driver's responsibility.
1019 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1022 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1025 local->scan_ies_len +=
1026 2 + sizeof(struct ieee80211_vht_cap);
1028 /* HE cap element is variable in size - set len to allow max size */
1030 * TODO: 1 is added at the end of the calculation to accommodate for
1031 * the temporary placing of the HE capabilities IE under EXT.
1032 * Remove it once it is placed in the final place.
1035 local->scan_ies_len +=
1036 2 + sizeof(struct ieee80211_he_cap_elem) +
1037 sizeof(struct ieee80211_he_mcs_nss_supp) +
1038 IEEE80211_HE_PPE_THRES_MAX_LEN + 1;
1040 if (!local->ops->hw_scan) {
1041 /* For hw_scan, driver needs to set these up. */
1042 local->hw.wiphy->max_scan_ssids = 4;
1043 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1047 * If the driver supports any scan IEs, then assume the
1048 * limit includes the IEs mac80211 will add, otherwise
1049 * leave it at zero and let the driver sort it out; we
1050 * still pass our IEs to the driver but userspace will
1051 * not be allowed to in that case.
1053 if (local->hw.wiphy->max_scan_ie_len)
1054 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1056 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1057 local->hw.n_cipher_schemes));
1059 result = ieee80211_init_cipher_suites(local);
1061 goto fail_wiphy_register;
1063 if (!local->ops->remain_on_channel)
1064 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1066 /* mac80211 based drivers don't support internal TDLS setup */
1067 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1068 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1070 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1071 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1072 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1074 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1076 result = wiphy_register(local->hw.wiphy);
1078 goto fail_wiphy_register;
1081 * We use the number of queues for feature tests (QoS, HT) internally
1082 * so restrict them appropriately.
1084 if (hw->queues > IEEE80211_MAX_QUEUES)
1085 hw->queues = IEEE80211_MAX_QUEUES;
1088 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1089 if (!local->workqueue) {
1091 goto fail_workqueue;
1095 * The hardware needs headroom for sending the frame,
1096 * and we need some headroom for passing the frame to monitor
1097 * interfaces, but never both at the same time.
1099 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1100 IEEE80211_TX_STATUS_HEADROOM);
1102 debugfs_hw_add(local);
1105 * if the driver doesn't specify a max listen interval we
1106 * use 5 which should be a safe default
1108 if (local->hw.max_listen_interval == 0)
1109 local->hw.max_listen_interval = 5;
1111 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1113 local->dynamic_ps_forced_timeout = -1;
1115 if (!local->hw.max_nan_de_entries)
1116 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1118 result = ieee80211_wep_init(local);
1120 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1123 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1125 ieee80211_led_init(local);
1127 result = ieee80211_txq_setup_flows(local);
1133 result = ieee80211_init_rate_ctrl_alg(local,
1134 hw->rate_control_algorithm);
1136 wiphy_debug(local->hw.wiphy,
1137 "Failed to initialize rate control algorithm\n");
1141 /* add one default STA interface if supported */
1142 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1143 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1144 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1145 NL80211_IFTYPE_STATION, NULL);
1147 wiphy_warn(local->hw.wiphy,
1148 "Failed to add default virtual iface\n");
1154 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1155 result = register_inetaddr_notifier(&local->ifa_notifier);
1160 #if IS_ENABLED(CONFIG_IPV6)
1161 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1162 result = register_inet6addr_notifier(&local->ifa6_notifier);
1169 #if IS_ENABLED(CONFIG_IPV6)
1172 unregister_inetaddr_notifier(&local->ifa_notifier);
1175 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1179 rate_control_deinitialize(local);
1180 ieee80211_remove_interfaces(local);
1183 ieee80211_led_exit(local);
1184 ieee80211_wep_free(local);
1185 ieee80211_txq_teardown_flows(local);
1187 destroy_workqueue(local->workqueue);
1189 wiphy_unregister(local->hw.wiphy);
1190 fail_wiphy_register:
1191 if (local->wiphy_ciphers_allocated)
1192 kfree(local->hw.wiphy->cipher_suites);
1193 kfree(local->int_scan_req);
1196 EXPORT_SYMBOL(ieee80211_register_hw);
1198 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1200 struct ieee80211_local *local = hw_to_local(hw);
1202 tasklet_kill(&local->tx_pending_tasklet);
1203 tasklet_kill(&local->tasklet);
1206 unregister_inetaddr_notifier(&local->ifa_notifier);
1208 #if IS_ENABLED(CONFIG_IPV6)
1209 unregister_inet6addr_notifier(&local->ifa6_notifier);
1215 * At this point, interface list manipulations are fine
1216 * because the driver cannot be handing us frames any
1217 * more and the tasklet is killed.
1219 ieee80211_remove_interfaces(local);
1223 cancel_delayed_work_sync(&local->roc_work);
1224 cancel_work_sync(&local->restart_work);
1225 cancel_work_sync(&local->reconfig_filter);
1226 cancel_work_sync(&local->tdls_chsw_work);
1227 flush_work(&local->sched_scan_stopped_work);
1228 flush_work(&local->radar_detected_work);
1230 ieee80211_clear_tx_pending(local);
1231 rate_control_deinitialize(local);
1233 if (skb_queue_len(&local->skb_queue) ||
1234 skb_queue_len(&local->skb_queue_unreliable))
1235 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1236 skb_queue_purge(&local->skb_queue);
1237 skb_queue_purge(&local->skb_queue_unreliable);
1238 skb_queue_purge(&local->skb_queue_tdls_chsw);
1239 ieee80211_txq_teardown_flows(local);
1241 destroy_workqueue(local->workqueue);
1242 wiphy_unregister(local->hw.wiphy);
1243 ieee80211_wep_free(local);
1244 ieee80211_led_exit(local);
1245 kfree(local->int_scan_req);
1247 EXPORT_SYMBOL(ieee80211_unregister_hw);
1249 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1251 WARN_ONCE(1, "Have pending ack frames!\n");
1256 void ieee80211_free_hw(struct ieee80211_hw *hw)
1258 struct ieee80211_local *local = hw_to_local(hw);
1260 mutex_destroy(&local->iflist_mtx);
1261 mutex_destroy(&local->mtx);
1263 if (local->wiphy_ciphers_allocated)
1264 kfree(local->hw.wiphy->cipher_suites);
1266 idr_for_each(&local->ack_status_frames,
1267 ieee80211_free_ack_frame, NULL);
1268 idr_destroy(&local->ack_status_frames);
1270 sta_info_stop(local);
1272 ieee80211_free_led_names(local);
1274 wiphy_free(local->hw.wiphy);
1276 EXPORT_SYMBOL(ieee80211_free_hw);
1278 static int __init ieee80211_init(void)
1280 struct sk_buff *skb;
1283 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1284 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1285 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1287 ret = rc80211_minstrel_init();
1291 ret = rc80211_minstrel_ht_init();
1295 ret = ieee80211_iface_init();
1301 rc80211_minstrel_ht_exit();
1303 rc80211_minstrel_exit();
1308 static void __exit ieee80211_exit(void)
1310 rc80211_minstrel_ht_exit();
1311 rc80211_minstrel_exit();
1315 ieee80211_iface_exit();
1321 subsys_initcall(ieee80211_init);
1322 module_exit(ieee80211_exit);
1324 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1325 MODULE_LICENSE("GPL");