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
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <net/mac80211.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/bitmap.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 void ieee80211_configure_filter(struct ieee80211_local *local)
39 unsigned int changed_flags;
40 unsigned int new_flags = 0;
42 if (atomic_read(&local->iff_allmultis))
43 new_flags |= FIF_ALLMULTI;
45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
47 new_flags |= FIF_BCN_PRBRESP_PROMISC;
49 if (local->fif_probe_req || local->probe_req_reg)
50 new_flags |= FIF_PROBE_REQ;
52 if (local->fif_fcsfail)
53 new_flags |= FIF_FCSFAIL;
55 if (local->fif_plcpfail)
56 new_flags |= FIF_PLCPFAIL;
58 if (local->fif_control)
59 new_flags |= FIF_CONTROL;
61 if (local->fif_other_bss)
62 new_flags |= FIF_OTHER_BSS;
64 if (local->fif_pspoll)
65 new_flags |= FIF_PSPOLL;
67 spin_lock_bh(&local->filter_lock);
68 changed_flags = local->filter_flags ^ new_flags;
70 mc = drv_prepare_multicast(local, &local->mc_list);
71 spin_unlock_bh(&local->filter_lock);
76 drv_configure_filter(local, changed_flags, &new_flags, mc);
78 WARN_ON(new_flags & (1<<31));
80 local->filter_flags = new_flags & ~(1<<31);
83 static void ieee80211_reconfig_filter(struct work_struct *work)
85 struct ieee80211_local *local =
86 container_of(work, struct ieee80211_local, reconfig_filter);
88 ieee80211_configure_filter(local);
91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
93 struct ieee80211_sub_if_data *sdata;
94 struct cfg80211_chan_def chandef = {};
99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
101 if (local->scan_chandef.chan) {
102 chandef = local->scan_chandef;
103 } else if (local->tmp_channel) {
104 chandef.chan = local->tmp_channel;
105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
106 chandef.center_freq1 = chandef.chan->center_freq;
108 chandef = local->_oper_chandef;
110 WARN(!cfg80211_chandef_valid(&chandef),
111 "control:%d MHz width:%d center: %d/%d MHz",
112 chandef.chan->center_freq, chandef.width,
113 chandef.center_freq1, chandef.center_freq2);
115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
122 if (offchannel_flag ||
123 !cfg80211_chandef_identical(&local->hw.conf.chandef,
124 &local->_oper_chandef)) {
125 local->hw.conf.chandef = chandef;
126 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
129 if (!conf_is_ht(&local->hw.conf)) {
131 * mac80211.h documents that this is only valid
132 * when the channel is set to an HT type, and
133 * that otherwise STATIC is used.
135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
136 } else if (local->hw.conf.smps_mode != local->smps_mode) {
137 local->hw.conf.smps_mode = local->smps_mode;
138 changed |= IEEE80211_CONF_CHANGE_SMPS;
141 power = ieee80211_chandef_max_power(&chandef);
144 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
145 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
149 power = min(power, sdata->vif.bss_conf.txpower);
153 if (local->hw.conf.power_level != power) {
154 changed |= IEEE80211_CONF_CHANGE_POWER;
155 local->hw.conf.power_level = power;
161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
167 if (!local->use_chanctx)
168 changed |= ieee80211_hw_conf_chan(local);
170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
171 IEEE80211_CONF_CHANGE_POWER);
173 if (changed && local->open_count) {
174 ret = drv_config(local, changed);
177 * HW reconfiguration should never fail, the driver has told
178 * us what it can support so it should live up to that promise.
181 * rfkill is not integrated with mac80211 and a
182 * configuration command can thus fail if hardware rfkill
185 * FIXME: integrate rfkill with mac80211 and then add this
195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
198 struct ieee80211_local *local = sdata->local;
200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
208 sdata->vif.bss_conf.use_cts_prot = false;
209 sdata->vif.bss_conf.use_short_preamble = false;
210 sdata->vif.bss_conf.use_short_slot = false;
211 return BSS_CHANGED_ERP_CTS_PROT |
212 BSS_CHANGED_ERP_PREAMBLE |
213 BSS_CHANGED_ERP_SLOT;
216 static void ieee80211_tasklet_handler(unsigned long data)
218 struct ieee80211_local *local = (struct ieee80211_local *) data;
221 while ((skb = skb_dequeue(&local->skb_queue)) ||
222 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
223 switch (skb->pkt_type) {
224 case IEEE80211_RX_MSG:
225 /* Clear skb->pkt_type in order to not confuse kernel
228 ieee80211_rx(&local->hw, skb);
230 case IEEE80211_TX_STATUS_MSG:
232 ieee80211_tx_status(&local->hw, skb);
235 WARN(1, "mac80211: Packet is of unknown type %d\n",
243 static void ieee80211_restart_work(struct work_struct *work)
245 struct ieee80211_local *local =
246 container_of(work, struct ieee80211_local, restart_work);
247 struct ieee80211_sub_if_data *sdata;
249 /* wait for scan work complete */
250 flush_workqueue(local->workqueue);
251 flush_work(&local->sched_scan_stopped_work);
253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
254 "%s called with hardware scan in progress\n", __func__);
257 list_for_each_entry(sdata, &local->interfaces, list) {
259 * XXX: there may be more work for other vif types and even
260 * for station mode: a good thing would be to run most of
261 * the iface type's dependent _stop (ieee80211_mg_stop,
262 * ieee80211_ibss_stop) etc...
263 * For now, fix only the specific bug that was seen: race
264 * between csa_connection_drop_work and us.
266 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
268 * This worker is scheduled from the iface worker that
269 * runs on mac80211's workqueue, so we can't be
270 * scheduling this worker after the cancel right here.
271 * The exception is ieee80211_chswitch_done.
272 * Then we can have a race...
274 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work);
276 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
278 ieee80211_scan_cancel(local);
280 /* make sure any new ROC will consider local->in_reconfig */
281 flush_delayed_work(&local->roc_work);
282 flush_work(&local->hw_roc_done);
284 ieee80211_reconfig(local);
288 void ieee80211_restart_hw(struct ieee80211_hw *hw)
290 struct ieee80211_local *local = hw_to_local(hw);
292 trace_api_restart_hw(local);
294 wiphy_info(hw->wiphy,
295 "Hardware restart was requested\n");
297 /* use this reason, ieee80211_reconfig will unblock it */
298 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
299 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
303 * Stop all Rx during the reconfig. We don't want state changes
304 * or driver callbacks while this is in progress.
306 local->in_reconfig = true;
309 queue_work(system_freezable_wq, &local->restart_work);
311 EXPORT_SYMBOL(ieee80211_restart_hw);
314 static int ieee80211_ifa_changed(struct notifier_block *nb,
315 unsigned long data, void *arg)
317 struct in_ifaddr *ifa = arg;
318 struct ieee80211_local *local =
319 container_of(nb, struct ieee80211_local,
321 struct net_device *ndev = ifa->ifa_dev->dev;
322 struct wireless_dev *wdev = ndev->ieee80211_ptr;
323 struct in_device *idev;
324 struct ieee80211_sub_if_data *sdata;
325 struct ieee80211_bss_conf *bss_conf;
326 struct ieee80211_if_managed *ifmgd;
329 /* Make sure it's our interface that got changed */
333 if (wdev->wiphy != local->hw.wiphy)
336 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
337 bss_conf = &sdata->vif.bss_conf;
339 /* ARP filtering is only supported in managed mode */
340 if (sdata->vif.type != NL80211_IFTYPE_STATION)
343 idev = __in_dev_get_rtnl(sdata->dev);
347 ifmgd = &sdata->u.mgd;
350 /* Copy the addresses to the bss_conf list */
351 ifa = idev->ifa_list;
353 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
354 bss_conf->arp_addr_list[c] = ifa->ifa_address;
359 bss_conf->arp_addr_cnt = c;
361 /* Configure driver only if associated (which also implies it is up) */
362 if (ifmgd->associated)
363 ieee80211_bss_info_change_notify(sdata,
364 BSS_CHANGED_ARP_FILTER);
372 #if IS_ENABLED(CONFIG_IPV6)
373 static int ieee80211_ifa6_changed(struct notifier_block *nb,
374 unsigned long data, void *arg)
376 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
377 struct inet6_dev *idev = ifa->idev;
378 struct net_device *ndev = ifa->idev->dev;
379 struct ieee80211_local *local =
380 container_of(nb, struct ieee80211_local, ifa6_notifier);
381 struct wireless_dev *wdev = ndev->ieee80211_ptr;
382 struct ieee80211_sub_if_data *sdata;
384 /* Make sure it's our interface that got changed */
385 if (!wdev || wdev->wiphy != local->hw.wiphy)
388 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
391 * For now only support station mode. This is mostly because
392 * doing AP would have to handle AP_VLAN in some way ...
394 if (sdata->vif.type != NL80211_IFTYPE_STATION)
397 drv_ipv6_addr_change(local, sdata, idev);
403 /* There isn't a lot of sense in it, but you can transmit anything you like */
404 static const struct ieee80211_txrx_stypes
405 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
406 [NL80211_IFTYPE_ADHOC] = {
408 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
409 BIT(IEEE80211_STYPE_AUTH >> 4) |
410 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
411 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
413 [NL80211_IFTYPE_STATION] = {
415 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
416 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
418 [NL80211_IFTYPE_AP] = {
420 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
421 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
423 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
424 BIT(IEEE80211_STYPE_AUTH >> 4) |
425 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
426 BIT(IEEE80211_STYPE_ACTION >> 4),
428 [NL80211_IFTYPE_AP_VLAN] = {
431 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
432 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
433 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
434 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
435 BIT(IEEE80211_STYPE_AUTH >> 4) |
436 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
437 BIT(IEEE80211_STYPE_ACTION >> 4),
439 [NL80211_IFTYPE_P2P_CLIENT] = {
441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
442 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
444 [NL80211_IFTYPE_P2P_GO] = {
446 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
447 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
448 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
449 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
450 BIT(IEEE80211_STYPE_AUTH >> 4) |
451 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
452 BIT(IEEE80211_STYPE_ACTION >> 4),
454 [NL80211_IFTYPE_MESH_POINT] = {
456 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
457 BIT(IEEE80211_STYPE_AUTH >> 4) |
458 BIT(IEEE80211_STYPE_DEAUTH >> 4),
460 [NL80211_IFTYPE_P2P_DEVICE] = {
462 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
463 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
467 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
468 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
469 IEEE80211_HT_AMPDU_PARM_DENSITY,
471 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
472 IEEE80211_HT_CAP_MAX_AMSDU |
473 IEEE80211_HT_CAP_SGI_20 |
474 IEEE80211_HT_CAP_SGI_40 |
475 IEEE80211_HT_CAP_LDPC_CODING |
476 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
478 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
479 0xff, 0xff, 0xff, 0xff, 0xff, },
483 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
485 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
486 IEEE80211_VHT_CAP_SHORT_GI_80 |
487 IEEE80211_VHT_CAP_SHORT_GI_160 |
488 IEEE80211_VHT_CAP_RXSTBC_MASK |
489 IEEE80211_VHT_CAP_TXSTBC |
490 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
491 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
492 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
493 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
494 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
496 .rx_mcs_map = cpu_to_le16(~0),
497 .tx_mcs_map = cpu_to_le16(~0),
501 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
502 const struct ieee80211_ops *ops,
503 const char *requested_name)
505 struct ieee80211_local *local;
510 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
511 !ops->add_interface || !ops->remove_interface ||
512 !ops->configure_filter))
515 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
518 /* check all or no channel context operations exist */
519 i = !!ops->add_chanctx + !!ops->remove_chanctx +
520 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
521 !!ops->unassign_vif_chanctx;
522 if (WARN_ON(i != 0 && i != 5))
524 use_chanctx = i == 5;
526 /* Ensure 32-byte alignment of our private data and hw private data.
527 * We use the wiphy priv data for both our ieee80211_local and for
528 * the driver's private data
530 * In memory it'll be like this:
532 * +-------------------------+
534 * +-------------------------+
535 * | struct ieee80211_local |
536 * +-------------------------+
537 * | driver's private data |
538 * +-------------------------+
541 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
543 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
548 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
550 wiphy->privid = mac80211_wiphy_privid;
552 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
553 WIPHY_FLAG_4ADDR_AP |
554 WIPHY_FLAG_4ADDR_STATION |
555 WIPHY_FLAG_REPORTS_OBSS |
556 WIPHY_FLAG_OFFCHAN_TX;
558 if (ops->remain_on_channel)
559 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
561 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
562 NL80211_FEATURE_SAE |
563 NL80211_FEATURE_HT_IBSS |
564 NL80211_FEATURE_VIF_TXPOWER |
565 NL80211_FEATURE_MAC_ON_CREATE |
566 NL80211_FEATURE_USERSPACE_MPM |
567 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
570 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
571 NL80211_FEATURE_AP_SCAN;
575 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
577 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM);
579 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
581 local = wiphy_priv(wiphy);
583 if (sta_info_init(local))
586 local->hw.wiphy = wiphy;
588 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
591 local->use_chanctx = use_chanctx;
593 /* set up some defaults */
594 local->hw.queues = 1;
595 local->hw.max_rates = 1;
596 local->hw.max_report_rates = 0;
597 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
598 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
599 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
600 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
601 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
602 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
603 IEEE80211_RADIOTAP_MCS_HAVE_GI |
604 IEEE80211_RADIOTAP_MCS_HAVE_BW;
605 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
606 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
607 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
608 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
609 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
610 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
611 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
613 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
615 wiphy->extended_capabilities = local->ext_capa;
616 wiphy->extended_capabilities_mask = local->ext_capa;
617 wiphy->extended_capabilities_len =
618 ARRAY_SIZE(local->ext_capa);
620 INIT_LIST_HEAD(&local->interfaces);
622 __hw_addr_init(&local->mc_list);
624 mutex_init(&local->iflist_mtx);
625 mutex_init(&local->mtx);
627 mutex_init(&local->key_mtx);
628 spin_lock_init(&local->filter_lock);
629 spin_lock_init(&local->rx_path_lock);
630 spin_lock_init(&local->queue_stop_reason_lock);
632 INIT_LIST_HEAD(&local->chanctx_list);
633 mutex_init(&local->chanctx_mtx);
635 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
637 INIT_WORK(&local->restart_work, ieee80211_restart_work);
639 INIT_WORK(&local->radar_detected_work,
640 ieee80211_dfs_radar_detected_work);
642 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
643 local->smps_mode = IEEE80211_SMPS_OFF;
645 INIT_WORK(&local->dynamic_ps_enable_work,
646 ieee80211_dynamic_ps_enable_work);
647 INIT_WORK(&local->dynamic_ps_disable_work,
648 ieee80211_dynamic_ps_disable_work);
649 setup_timer(&local->dynamic_ps_timer,
650 ieee80211_dynamic_ps_timer, (unsigned long) local);
652 INIT_WORK(&local->sched_scan_stopped_work,
653 ieee80211_sched_scan_stopped_work);
655 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
657 spin_lock_init(&local->ack_status_lock);
658 idr_init(&local->ack_status_frames);
660 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
661 skb_queue_head_init(&local->pending[i]);
662 atomic_set(&local->agg_queue_stop[i], 0);
664 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
665 (unsigned long)local);
667 tasklet_init(&local->tasklet,
668 ieee80211_tasklet_handler,
669 (unsigned long) local);
671 skb_queue_head_init(&local->skb_queue);
672 skb_queue_head_init(&local->skb_queue_unreliable);
673 skb_queue_head_init(&local->skb_queue_tdls_chsw);
675 ieee80211_alloc_led_names(local);
677 ieee80211_roc_setup(local);
679 local->hw.radiotap_timestamp.units_pos = -1;
680 local->hw.radiotap_timestamp.accuracy = -1;
687 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
689 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
691 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
692 IS_ERR(local->wep_rx_tfm));
693 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
694 int n_suites = 0, r = 0, w = 0;
696 static const u32 cipher_suites[] = {
697 /* keep WEP first, it may be removed below */
698 WLAN_CIPHER_SUITE_WEP40,
699 WLAN_CIPHER_SUITE_WEP104,
700 WLAN_CIPHER_SUITE_TKIP,
701 WLAN_CIPHER_SUITE_CCMP,
702 WLAN_CIPHER_SUITE_CCMP_256,
703 WLAN_CIPHER_SUITE_GCMP,
704 WLAN_CIPHER_SUITE_GCMP_256,
706 /* keep last -- depends on hw flags! */
707 WLAN_CIPHER_SUITE_AES_CMAC,
708 WLAN_CIPHER_SUITE_BIP_CMAC_256,
709 WLAN_CIPHER_SUITE_BIP_GMAC_128,
710 WLAN_CIPHER_SUITE_BIP_GMAC_256,
713 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
714 local->hw.wiphy->cipher_suites) {
715 /* If the driver advertises, or doesn't support SW crypto,
716 * we only need to remove WEP if necessary.
721 /* well if it has _no_ ciphers ... fine */
722 if (!local->hw.wiphy->n_cipher_suites)
725 /* Driver provides cipher suites, but we need to exclude WEP */
726 suites = kmemdup(local->hw.wiphy->cipher_suites,
727 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
732 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
733 u32 suite = local->hw.wiphy->cipher_suites[r];
735 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
736 suite == WLAN_CIPHER_SUITE_WEP104)
740 } else if (!local->hw.cipher_schemes) {
741 /* If the driver doesn't have cipher schemes, there's nothing
742 * else to do other than assign the (software supported and
743 * perhaps offloaded) cipher suites.
745 local->hw.wiphy->cipher_suites = cipher_suites;
746 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
749 local->hw.wiphy->n_cipher_suites -= 4;
752 local->hw.wiphy->cipher_suites += 2;
753 local->hw.wiphy->n_cipher_suites -= 2;
756 /* not dynamically allocated, so just return */
759 const struct ieee80211_cipher_scheme *cs;
761 cs = local->hw.cipher_schemes;
763 /* Driver specifies cipher schemes only (but not cipher suites
764 * including the schemes)
766 * We start counting ciphers defined by schemes, TKIP, CCMP,
767 * CCMP-256, GCMP, and GCMP-256
769 n_suites = local->hw.n_cipher_schemes + 5;
771 /* check if we have WEP40 and WEP104 */
775 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
781 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
785 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
786 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
787 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
788 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
789 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
792 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
793 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
797 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
798 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
799 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
800 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
803 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
804 suites[w++] = cs[r].cipher;
805 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
812 local->hw.wiphy->cipher_suites = suites;
813 local->hw.wiphy->n_cipher_suites = w;
814 local->wiphy_ciphers_allocated = true;
819 int ieee80211_register_hw(struct ieee80211_hw *hw)
821 struct ieee80211_local *local = hw_to_local(hw);
823 enum nl80211_band band;
824 int channels, max_bitrates;
825 bool supp_ht, supp_vht;
826 netdev_features_t feature_whitelist;
827 struct cfg80211_chan_def dflt_chandef = {};
829 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
830 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
831 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
834 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
835 (!local->ops->tdls_channel_switch ||
836 !local->ops->tdls_cancel_channel_switch ||
837 !local->ops->tdls_recv_channel_switch))
840 if (WARN_ON(local->hw.wiphy->interface_modes &
841 BIT(NL80211_IFTYPE_NAN) &&
842 (!local->ops->start_nan || !local->ops->stop_nan)))
846 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
850 if (!local->use_chanctx) {
851 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
852 const struct ieee80211_iface_combination *comb;
854 comb = &local->hw.wiphy->iface_combinations[i];
856 if (comb->num_different_channels > 1)
861 * WDS is currently prohibited when channel contexts are used
862 * because there's no clear definition of which channel WDS
863 * type interfaces use
865 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
868 /* DFS is not supported with multi-channel combinations yet */
869 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
870 const struct ieee80211_iface_combination *comb;
872 comb = &local->hw.wiphy->iface_combinations[i];
874 if (comb->radar_detect_widths &&
875 comb->num_different_channels > 1)
880 /* Only HW csum features are currently compatible with mac80211 */
881 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
882 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
883 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM;
884 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
887 if (hw->max_report_rates == 0)
888 hw->max_report_rates = hw->max_rates;
890 local->rx_chains = 1;
893 * generic code guarantees at least one band,
894 * set this very early because much code assumes
895 * that hw.conf.channel is assigned
901 for (band = 0; band < NUM_NL80211_BANDS; band++) {
902 struct ieee80211_supported_band *sband;
904 sband = local->hw.wiphy->bands[band];
908 if (!dflt_chandef.chan) {
910 * Assign the first enabled channel to dflt_chandef
911 * from the list of channels
913 for (i = 0; i < sband->n_channels; i++)
914 if (!(sband->channels[i].flags &
915 IEEE80211_CHAN_DISABLED))
917 /* if none found then use the first anyway */
918 if (i == sband->n_channels)
920 cfg80211_chandef_create(&dflt_chandef,
923 /* init channel we're on */
924 if (!local->use_chanctx && !local->_oper_chandef.chan) {
925 local->hw.conf.chandef = dflt_chandef;
926 local->_oper_chandef = dflt_chandef;
928 local->monitor_chandef = dflt_chandef;
931 channels += sband->n_channels;
933 if (max_bitrates < sband->n_bitrates)
934 max_bitrates = sband->n_bitrates;
935 supp_ht = supp_ht || sband->ht_cap.ht_supported;
936 supp_vht = supp_vht || sband->vht_cap.vht_supported;
938 if (!sband->ht_cap.ht_supported)
941 /* TODO: consider VHT for RX chains, hopefully it's the same */
943 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
946 /* no need to mask, SM_PS_DISABLED has all bits set */
947 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
948 IEEE80211_HT_CAP_SM_PS_SHIFT;
951 /* if low-level driver supports AP, we also support VLAN */
952 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
953 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
954 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
957 /* mac80211 always supports monitor */
958 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
959 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
961 /* mac80211 doesn't support more than one IBSS interface right now */
962 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
963 const struct ieee80211_iface_combination *c;
966 c = &hw->wiphy->iface_combinations[i];
968 for (j = 0; j < c->n_limits; j++)
969 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
970 c->limits[j].max > 1)
974 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
975 sizeof(void *) * channels, GFP_KERNEL);
976 if (!local->int_scan_req)
979 for (band = 0; band < NUM_NL80211_BANDS; band++) {
980 if (!local->hw.wiphy->bands[band])
982 local->int_scan_req->rates[band] = (u32) -1;
985 #ifndef CONFIG_MAC80211_MESH
986 /* mesh depends on Kconfig, but drivers should set it if they want */
987 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
990 /* if the underlying driver supports mesh, mac80211 will (at least)
991 * provide routing of mesh authentication frames to userspace */
992 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
993 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
995 /* mac80211 supports control port protocol changing */
996 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
998 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
999 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
1000 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
1001 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
1002 if (hw->max_signal <= 0) {
1004 goto fail_wiphy_register;
1009 * Calculate scan IE length -- we need this to alloc
1010 * memory and to subtract from the driver limit. It
1011 * includes the DS Params, (extended) supported rates, and HT
1012 * information -- SSID is the driver's responsibility.
1014 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
1017 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
1020 local->scan_ies_len +=
1021 2 + sizeof(struct ieee80211_vht_cap);
1023 if (!local->ops->hw_scan) {
1024 /* For hw_scan, driver needs to set these up. */
1025 local->hw.wiphy->max_scan_ssids = 4;
1026 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1030 * If the driver supports any scan IEs, then assume the
1031 * limit includes the IEs mac80211 will add, otherwise
1032 * leave it at zero and let the driver sort it out; we
1033 * still pass our IEs to the driver but userspace will
1034 * not be allowed to in that case.
1036 if (local->hw.wiphy->max_scan_ie_len)
1037 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
1039 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
1040 local->hw.n_cipher_schemes))) {
1042 goto fail_workqueue;
1045 result = ieee80211_init_cipher_suites(local);
1047 goto fail_wiphy_register;
1049 if (!local->ops->remain_on_channel)
1050 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1052 /* mac80211 based drivers don't support internal TDLS setup */
1053 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1054 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1056 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1057 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1058 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1060 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1062 result = wiphy_register(local->hw.wiphy);
1064 goto fail_wiphy_register;
1067 * We use the number of queues for feature tests (QoS, HT) internally
1068 * so restrict them appropriately.
1070 if (hw->queues > IEEE80211_MAX_QUEUES)
1071 hw->queues = IEEE80211_MAX_QUEUES;
1074 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1075 if (!local->workqueue) {
1077 goto fail_workqueue;
1081 * The hardware needs headroom for sending the frame,
1082 * and we need some headroom for passing the frame to monitor
1083 * interfaces, but never both at the same time.
1085 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1086 IEEE80211_TX_STATUS_HEADROOM);
1088 debugfs_hw_add(local);
1091 * if the driver doesn't specify a max listen interval we
1092 * use 5 which should be a safe default
1094 if (local->hw.max_listen_interval == 0)
1095 local->hw.max_listen_interval = 5;
1097 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1099 local->dynamic_ps_forced_timeout = -1;
1101 if (!local->hw.max_nan_de_entries)
1102 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID;
1104 result = ieee80211_wep_init(local);
1106 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1109 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1111 ieee80211_led_init(local);
1115 result = ieee80211_init_rate_ctrl_alg(local,
1116 hw->rate_control_algorithm);
1118 wiphy_debug(local->hw.wiphy,
1119 "Failed to initialize rate control algorithm\n");
1123 /* add one default STA interface if supported */
1124 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1125 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1126 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1127 NL80211_IFTYPE_STATION, NULL);
1129 wiphy_warn(local->hw.wiphy,
1130 "Failed to add default virtual iface\n");
1135 result = ieee80211_txq_setup_flows(local);
1140 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1141 result = register_inetaddr_notifier(&local->ifa_notifier);
1146 #if IS_ENABLED(CONFIG_IPV6)
1147 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1148 result = register_inet6addr_notifier(&local->ifa6_notifier);
1155 #if IS_ENABLED(CONFIG_IPV6)
1158 unregister_inetaddr_notifier(&local->ifa_notifier);
1161 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1164 ieee80211_txq_teardown_flows(local);
1167 rate_control_deinitialize(local);
1168 ieee80211_remove_interfaces(local);
1171 ieee80211_led_exit(local);
1172 ieee80211_wep_free(local);
1173 destroy_workqueue(local->workqueue);
1175 wiphy_unregister(local->hw.wiphy);
1176 fail_wiphy_register:
1177 if (local->wiphy_ciphers_allocated)
1178 kfree(local->hw.wiphy->cipher_suites);
1179 kfree(local->int_scan_req);
1182 EXPORT_SYMBOL(ieee80211_register_hw);
1184 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1186 struct ieee80211_local *local = hw_to_local(hw);
1188 tasklet_kill(&local->tx_pending_tasklet);
1189 tasklet_kill(&local->tasklet);
1192 unregister_inetaddr_notifier(&local->ifa_notifier);
1194 #if IS_ENABLED(CONFIG_IPV6)
1195 unregister_inet6addr_notifier(&local->ifa6_notifier);
1197 ieee80211_txq_teardown_flows(local);
1202 * At this point, interface list manipulations are fine
1203 * because the driver cannot be handing us frames any
1204 * more and the tasklet is killed.
1206 ieee80211_remove_interfaces(local);
1210 cancel_delayed_work_sync(&local->roc_work);
1211 cancel_work_sync(&local->restart_work);
1212 cancel_work_sync(&local->reconfig_filter);
1213 cancel_work_sync(&local->tdls_chsw_work);
1214 flush_work(&local->sched_scan_stopped_work);
1216 ieee80211_clear_tx_pending(local);
1217 rate_control_deinitialize(local);
1219 if (skb_queue_len(&local->skb_queue) ||
1220 skb_queue_len(&local->skb_queue_unreliable))
1221 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1222 skb_queue_purge(&local->skb_queue);
1223 skb_queue_purge(&local->skb_queue_unreliable);
1224 skb_queue_purge(&local->skb_queue_tdls_chsw);
1226 destroy_workqueue(local->workqueue);
1227 wiphy_unregister(local->hw.wiphy);
1228 ieee80211_wep_free(local);
1229 ieee80211_led_exit(local);
1230 kfree(local->int_scan_req);
1232 EXPORT_SYMBOL(ieee80211_unregister_hw);
1234 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1236 WARN_ONCE(1, "Have pending ack frames!\n");
1241 void ieee80211_free_hw(struct ieee80211_hw *hw)
1243 struct ieee80211_local *local = hw_to_local(hw);
1245 mutex_destroy(&local->iflist_mtx);
1246 mutex_destroy(&local->mtx);
1248 if (local->wiphy_ciphers_allocated)
1249 kfree(local->hw.wiphy->cipher_suites);
1251 idr_for_each(&local->ack_status_frames,
1252 ieee80211_free_ack_frame, NULL);
1253 idr_destroy(&local->ack_status_frames);
1255 sta_info_stop(local);
1257 ieee80211_free_led_names(local);
1259 wiphy_free(local->hw.wiphy);
1261 EXPORT_SYMBOL(ieee80211_free_hw);
1263 static int __init ieee80211_init(void)
1265 struct sk_buff *skb;
1268 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1269 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1270 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1272 ret = rc80211_minstrel_init();
1276 ret = rc80211_minstrel_ht_init();
1280 ret = ieee80211_iface_init();
1286 rc80211_minstrel_ht_exit();
1288 rc80211_minstrel_exit();
1293 static void __exit ieee80211_exit(void)
1295 rc80211_minstrel_ht_exit();
1296 rc80211_minstrel_exit();
1300 ieee80211_iface_exit();
1306 subsys_initcall(ieee80211_init);
1307 module_exit(ieee80211_exit);
1309 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1310 MODULE_LICENSE("GPL");