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);
252 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
253 "%s called with hardware scan in progress\n", __func__);
256 list_for_each_entry(sdata, &local->interfaces, list)
257 flush_delayed_work(&sdata->dec_tailroom_needed_wk);
258 ieee80211_scan_cancel(local);
259 ieee80211_reconfig(local);
263 void ieee80211_restart_hw(struct ieee80211_hw *hw)
265 struct ieee80211_local *local = hw_to_local(hw);
267 trace_api_restart_hw(local);
269 wiphy_info(hw->wiphy,
270 "Hardware restart was requested\n");
272 /* use this reason, ieee80211_reconfig will unblock it */
273 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
274 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
278 * Stop all Rx during the reconfig. We don't want state changes
279 * or driver callbacks while this is in progress.
281 local->in_reconfig = true;
284 queue_work(system_freezable_wq, &local->restart_work);
286 EXPORT_SYMBOL(ieee80211_restart_hw);
289 static int ieee80211_ifa_changed(struct notifier_block *nb,
290 unsigned long data, void *arg)
292 struct in_ifaddr *ifa = arg;
293 struct ieee80211_local *local =
294 container_of(nb, struct ieee80211_local,
296 struct net_device *ndev = ifa->ifa_dev->dev;
297 struct wireless_dev *wdev = ndev->ieee80211_ptr;
298 struct in_device *idev;
299 struct ieee80211_sub_if_data *sdata;
300 struct ieee80211_bss_conf *bss_conf;
301 struct ieee80211_if_managed *ifmgd;
304 /* Make sure it's our interface that got changed */
308 if (wdev->wiphy != local->hw.wiphy)
311 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
312 bss_conf = &sdata->vif.bss_conf;
314 /* ARP filtering is only supported in managed mode */
315 if (sdata->vif.type != NL80211_IFTYPE_STATION)
318 idev = __in_dev_get_rtnl(sdata->dev);
322 ifmgd = &sdata->u.mgd;
325 /* Copy the addresses to the bss_conf list */
326 ifa = idev->ifa_list;
328 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
329 bss_conf->arp_addr_list[c] = ifa->ifa_address;
334 bss_conf->arp_addr_cnt = c;
336 /* Configure driver only if associated (which also implies it is up) */
337 if (ifmgd->associated)
338 ieee80211_bss_info_change_notify(sdata,
339 BSS_CHANGED_ARP_FILTER);
347 #if IS_ENABLED(CONFIG_IPV6)
348 static int ieee80211_ifa6_changed(struct notifier_block *nb,
349 unsigned long data, void *arg)
351 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
352 struct inet6_dev *idev = ifa->idev;
353 struct net_device *ndev = ifa->idev->dev;
354 struct ieee80211_local *local =
355 container_of(nb, struct ieee80211_local, ifa6_notifier);
356 struct wireless_dev *wdev = ndev->ieee80211_ptr;
357 struct ieee80211_sub_if_data *sdata;
359 /* Make sure it's our interface that got changed */
360 if (!wdev || wdev->wiphy != local->hw.wiphy)
363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
366 * For now only support station mode. This is mostly because
367 * doing AP would have to handle AP_VLAN in some way ...
369 if (sdata->vif.type != NL80211_IFTYPE_STATION)
372 drv_ipv6_addr_change(local, sdata, idev);
378 /* There isn't a lot of sense in it, but you can transmit anything you like */
379 static const struct ieee80211_txrx_stypes
380 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
381 [NL80211_IFTYPE_ADHOC] = {
383 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
384 BIT(IEEE80211_STYPE_AUTH >> 4) |
385 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
386 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
388 [NL80211_IFTYPE_STATION] = {
390 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
391 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
393 [NL80211_IFTYPE_AP] = {
395 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
396 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
398 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
399 BIT(IEEE80211_STYPE_AUTH >> 4) |
400 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
401 BIT(IEEE80211_STYPE_ACTION >> 4),
403 [NL80211_IFTYPE_AP_VLAN] = {
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_P2P_CLIENT] = {
416 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
419 [NL80211_IFTYPE_P2P_GO] = {
421 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
422 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
423 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
424 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
425 BIT(IEEE80211_STYPE_AUTH >> 4) |
426 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
427 BIT(IEEE80211_STYPE_ACTION >> 4),
429 [NL80211_IFTYPE_MESH_POINT] = {
431 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
432 BIT(IEEE80211_STYPE_AUTH >> 4) |
433 BIT(IEEE80211_STYPE_DEAUTH >> 4),
435 [NL80211_IFTYPE_P2P_DEVICE] = {
437 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
438 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
442 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
443 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
444 IEEE80211_HT_AMPDU_PARM_DENSITY,
446 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
447 IEEE80211_HT_CAP_MAX_AMSDU |
448 IEEE80211_HT_CAP_SGI_20 |
449 IEEE80211_HT_CAP_SGI_40 |
450 IEEE80211_HT_CAP_LDPC_CODING |
451 IEEE80211_HT_CAP_40MHZ_INTOLERANT),
453 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
454 0xff, 0xff, 0xff, 0xff, 0xff, },
458 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
460 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
461 IEEE80211_VHT_CAP_SHORT_GI_80 |
462 IEEE80211_VHT_CAP_SHORT_GI_160 |
463 IEEE80211_VHT_CAP_RXSTBC_1 |
464 IEEE80211_VHT_CAP_RXSTBC_2 |
465 IEEE80211_VHT_CAP_RXSTBC_3 |
466 IEEE80211_VHT_CAP_RXSTBC_4 |
467 IEEE80211_VHT_CAP_TXSTBC |
468 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
469 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
470 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
471 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
472 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
474 .rx_mcs_map = cpu_to_le16(~0),
475 .tx_mcs_map = cpu_to_le16(~0),
479 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
480 const struct ieee80211_ops *ops,
481 const char *requested_name)
483 struct ieee80211_local *local;
488 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
489 !ops->add_interface || !ops->remove_interface ||
490 !ops->configure_filter))
493 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
496 /* check all or no channel context operations exist */
497 i = !!ops->add_chanctx + !!ops->remove_chanctx +
498 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
499 !!ops->unassign_vif_chanctx;
500 if (WARN_ON(i != 0 && i != 5))
502 use_chanctx = i == 5;
504 /* Ensure 32-byte alignment of our private data and hw private data.
505 * We use the wiphy priv data for both our ieee80211_local and for
506 * the driver's private data
508 * In memory it'll be like this:
510 * +-------------------------+
512 * +-------------------------+
513 * | struct ieee80211_local |
514 * +-------------------------+
515 * | driver's private data |
516 * +-------------------------+
519 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
521 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
526 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
528 wiphy->privid = mac80211_wiphy_privid;
530 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
531 WIPHY_FLAG_4ADDR_AP |
532 WIPHY_FLAG_4ADDR_STATION |
533 WIPHY_FLAG_REPORTS_OBSS |
534 WIPHY_FLAG_OFFCHAN_TX;
536 if (ops->remain_on_channel)
537 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
539 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
540 NL80211_FEATURE_SAE |
541 NL80211_FEATURE_HT_IBSS |
542 NL80211_FEATURE_VIF_TXPOWER |
543 NL80211_FEATURE_MAC_ON_CREATE |
544 NL80211_FEATURE_USERSPACE_MPM |
545 NL80211_FEATURE_FULL_AP_CLIENT_STATE;
548 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
549 NL80211_FEATURE_AP_SCAN;
553 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
555 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
557 local = wiphy_priv(wiphy);
559 if (sta_info_init(local))
562 local->hw.wiphy = wiphy;
564 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
567 local->use_chanctx = use_chanctx;
569 /* set up some defaults */
570 local->hw.queues = 1;
571 local->hw.max_rates = 1;
572 local->hw.max_report_rates = 0;
573 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
574 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
575 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
576 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
577 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
578 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
579 IEEE80211_RADIOTAP_MCS_HAVE_GI |
580 IEEE80211_RADIOTAP_MCS_HAVE_BW;
581 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
582 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
583 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
584 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
585 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
586 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
587 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
589 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;
591 wiphy->extended_capabilities = local->ext_capa;
592 wiphy->extended_capabilities_mask = local->ext_capa;
593 wiphy->extended_capabilities_len =
594 ARRAY_SIZE(local->ext_capa);
596 INIT_LIST_HEAD(&local->interfaces);
598 __hw_addr_init(&local->mc_list);
600 mutex_init(&local->iflist_mtx);
601 mutex_init(&local->mtx);
603 mutex_init(&local->key_mtx);
604 spin_lock_init(&local->filter_lock);
605 spin_lock_init(&local->rx_path_lock);
606 spin_lock_init(&local->queue_stop_reason_lock);
608 INIT_LIST_HEAD(&local->chanctx_list);
609 mutex_init(&local->chanctx_mtx);
611 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
613 INIT_WORK(&local->restart_work, ieee80211_restart_work);
615 INIT_WORK(&local->radar_detected_work,
616 ieee80211_dfs_radar_detected_work);
618 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
619 local->smps_mode = IEEE80211_SMPS_OFF;
621 INIT_WORK(&local->dynamic_ps_enable_work,
622 ieee80211_dynamic_ps_enable_work);
623 INIT_WORK(&local->dynamic_ps_disable_work,
624 ieee80211_dynamic_ps_disable_work);
625 setup_timer(&local->dynamic_ps_timer,
626 ieee80211_dynamic_ps_timer, (unsigned long) local);
628 INIT_WORK(&local->sched_scan_stopped_work,
629 ieee80211_sched_scan_stopped_work);
631 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
633 spin_lock_init(&local->ack_status_lock);
634 idr_init(&local->ack_status_frames);
636 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
637 skb_queue_head_init(&local->pending[i]);
638 atomic_set(&local->agg_queue_stop[i], 0);
640 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
641 (unsigned long)local);
643 tasklet_init(&local->tasklet,
644 ieee80211_tasklet_handler,
645 (unsigned long) local);
647 skb_queue_head_init(&local->skb_queue);
648 skb_queue_head_init(&local->skb_queue_unreliable);
649 skb_queue_head_init(&local->skb_queue_tdls_chsw);
651 ieee80211_alloc_led_names(local);
653 ieee80211_roc_setup(local);
660 EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
662 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
664 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
665 IS_ERR(local->wep_rx_tfm));
666 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE);
667 int n_suites = 0, r = 0, w = 0;
669 static const u32 cipher_suites[] = {
670 /* keep WEP first, it may be removed below */
671 WLAN_CIPHER_SUITE_WEP40,
672 WLAN_CIPHER_SUITE_WEP104,
673 WLAN_CIPHER_SUITE_TKIP,
674 WLAN_CIPHER_SUITE_CCMP,
675 WLAN_CIPHER_SUITE_CCMP_256,
676 WLAN_CIPHER_SUITE_GCMP,
677 WLAN_CIPHER_SUITE_GCMP_256,
679 /* keep last -- depends on hw flags! */
680 WLAN_CIPHER_SUITE_AES_CMAC,
681 WLAN_CIPHER_SUITE_BIP_CMAC_256,
682 WLAN_CIPHER_SUITE_BIP_GMAC_128,
683 WLAN_CIPHER_SUITE_BIP_GMAC_256,
686 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) ||
687 local->hw.wiphy->cipher_suites) {
688 /* If the driver advertises, or doesn't support SW crypto,
689 * we only need to remove WEP if necessary.
694 /* well if it has _no_ ciphers ... fine */
695 if (!local->hw.wiphy->n_cipher_suites)
698 /* Driver provides cipher suites, but we need to exclude WEP */
699 suites = kmemdup(local->hw.wiphy->cipher_suites,
700 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
705 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
706 u32 suite = local->hw.wiphy->cipher_suites[r];
708 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
709 suite == WLAN_CIPHER_SUITE_WEP104)
713 } else if (!local->hw.cipher_schemes) {
714 /* If the driver doesn't have cipher schemes, there's nothing
715 * else to do other than assign the (software supported and
716 * perhaps offloaded) cipher suites.
718 local->hw.wiphy->cipher_suites = cipher_suites;
719 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
722 local->hw.wiphy->n_cipher_suites -= 4;
725 local->hw.wiphy->cipher_suites += 2;
726 local->hw.wiphy->n_cipher_suites -= 2;
729 /* not dynamically allocated, so just return */
732 const struct ieee80211_cipher_scheme *cs;
734 cs = local->hw.cipher_schemes;
736 /* Driver specifies cipher schemes only (but not cipher suites
737 * including the schemes)
739 * We start counting ciphers defined by schemes, TKIP, CCMP,
740 * CCMP-256, GCMP, and GCMP-256
742 n_suites = local->hw.n_cipher_schemes + 5;
744 /* check if we have WEP40 and WEP104 */
748 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
754 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
758 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
759 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
760 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
761 suites[w++] = WLAN_CIPHER_SUITE_GCMP;
762 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
765 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
766 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
770 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
771 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
772 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
773 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
776 for (r = 0; r < local->hw.n_cipher_schemes; r++) {
777 suites[w++] = cs[r].cipher;
778 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) {
785 local->hw.wiphy->cipher_suites = suites;
786 local->hw.wiphy->n_cipher_suites = w;
787 local->wiphy_ciphers_allocated = true;
792 int ieee80211_register_hw(struct ieee80211_hw *hw)
794 struct ieee80211_local *local = hw_to_local(hw);
796 enum ieee80211_band band;
797 int channels, max_bitrates;
798 bool supp_ht, supp_vht;
799 netdev_features_t feature_whitelist;
800 struct cfg80211_chan_def dflt_chandef = {};
802 if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
803 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
804 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
807 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
808 (!local->ops->tdls_channel_switch ||
809 !local->ops->tdls_cancel_channel_switch ||
810 !local->ops->tdls_recv_channel_switch))
814 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
818 if (!local->use_chanctx) {
819 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
820 const struct ieee80211_iface_combination *comb;
822 comb = &local->hw.wiphy->iface_combinations[i];
824 if (comb->num_different_channels > 1)
829 * WDS is currently prohibited when channel contexts are used
830 * because there's no clear definition of which channel WDS
831 * type interfaces use
833 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
836 /* DFS is not supported with multi-channel combinations yet */
837 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
838 const struct ieee80211_iface_combination *comb;
840 comb = &local->hw.wiphy->iface_combinations[i];
842 if (comb->radar_detect_widths &&
843 comb->num_different_channels > 1)
848 /* Only HW csum features are currently compatible with mac80211 */
849 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
850 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
851 NETIF_F_GSO_SOFTWARE;
852 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
855 if (hw->max_report_rates == 0)
856 hw->max_report_rates = hw->max_rates;
858 local->rx_chains = 1;
861 * generic code guarantees at least one band,
862 * set this very early because much code assumes
863 * that hw.conf.channel is assigned
869 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
870 struct ieee80211_supported_band *sband;
872 sband = local->hw.wiphy->bands[band];
876 if (!dflt_chandef.chan) {
877 cfg80211_chandef_create(&dflt_chandef,
880 /* init channel we're on */
881 if (!local->use_chanctx && !local->_oper_chandef.chan) {
882 local->hw.conf.chandef = dflt_chandef;
883 local->_oper_chandef = dflt_chandef;
885 local->monitor_chandef = dflt_chandef;
888 channels += sband->n_channels;
890 if (max_bitrates < sband->n_bitrates)
891 max_bitrates = sband->n_bitrates;
892 supp_ht = supp_ht || sband->ht_cap.ht_supported;
893 supp_vht = supp_vht || sband->vht_cap.vht_supported;
895 if (sband->ht_cap.ht_supported)
897 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
900 /* TODO: consider VHT for RX chains, hopefully it's the same */
903 /* if low-level driver supports AP, we also support VLAN */
904 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
905 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
906 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
909 /* mac80211 always supports monitor */
910 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
911 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
913 /* mac80211 doesn't support more than one IBSS interface right now */
914 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
915 const struct ieee80211_iface_combination *c;
918 c = &hw->wiphy->iface_combinations[i];
920 for (j = 0; j < c->n_limits; j++)
921 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
922 c->limits[j].max > 1)
926 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
927 sizeof(void *) * channels, GFP_KERNEL);
928 if (!local->int_scan_req)
931 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
932 if (!local->hw.wiphy->bands[band])
934 local->int_scan_req->rates[band] = (u32) -1;
937 #ifndef CONFIG_MAC80211_MESH
938 /* mesh depends on Kconfig, but drivers should set it if they want */
939 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
942 /* if the underlying driver supports mesh, mac80211 will (at least)
943 * provide routing of mesh authentication frames to userspace */
944 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
945 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
947 /* mac80211 supports control port protocol changing */
948 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
950 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) {
951 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
952 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) {
953 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
954 if (hw->max_signal <= 0) {
956 goto fail_wiphy_register;
961 * Calculate scan IE length -- we need this to alloc
962 * memory and to subtract from the driver limit. It
963 * includes the DS Params, (extended) supported rates, and HT
964 * information -- SSID is the driver's responsibility.
966 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
969 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
972 local->scan_ies_len +=
973 2 + sizeof(struct ieee80211_vht_cap);
975 if (!local->ops->hw_scan) {
976 /* For hw_scan, driver needs to set these up. */
977 local->hw.wiphy->max_scan_ssids = 4;
978 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
982 * If the driver supports any scan IEs, then assume the
983 * limit includes the IEs mac80211 will add, otherwise
984 * leave it at zero and let the driver sort it out; we
985 * still pass our IEs to the driver but userspace will
986 * not be allowed to in that case.
988 if (local->hw.wiphy->max_scan_ie_len)
989 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
991 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
992 local->hw.n_cipher_schemes));
994 result = ieee80211_init_cipher_suites(local);
996 goto fail_wiphy_register;
998 if (!local->ops->remain_on_channel)
999 local->hw.wiphy->max_remain_on_channel_duration = 5000;
1001 /* mac80211 based drivers don't support internal TDLS setup */
1002 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
1003 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
1005 /* mac80211 supports eCSA, if the driver supports STA CSA at all */
1006 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA))
1007 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;
1009 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;
1011 result = wiphy_register(local->hw.wiphy);
1013 goto fail_wiphy_register;
1016 * We use the number of queues for feature tests (QoS, HT) internally
1017 * so restrict them appropriately.
1019 if (hw->queues > IEEE80211_MAX_QUEUES)
1020 hw->queues = IEEE80211_MAX_QUEUES;
1023 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1024 if (!local->workqueue) {
1026 goto fail_workqueue;
1030 * The hardware needs headroom for sending the frame,
1031 * and we need some headroom for passing the frame to monitor
1032 * interfaces, but never both at the same time.
1034 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1035 IEEE80211_TX_STATUS_HEADROOM);
1037 debugfs_hw_add(local);
1040 * if the driver doesn't specify a max listen interval we
1041 * use 5 which should be a safe default
1043 if (local->hw.max_listen_interval == 0)
1044 local->hw.max_listen_interval = 5;
1046 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1048 local->dynamic_ps_forced_timeout = -1;
1050 if (!local->hw.txq_ac_max_pending)
1051 local->hw.txq_ac_max_pending = 64;
1053 result = ieee80211_wep_init(local);
1055 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1058 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1060 ieee80211_led_init(local);
1064 result = ieee80211_init_rate_ctrl_alg(local,
1065 hw->rate_control_algorithm);
1067 wiphy_debug(local->hw.wiphy,
1068 "Failed to initialize rate control algorithm\n");
1072 /* add one default STA interface if supported */
1073 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) &&
1074 !ieee80211_hw_check(hw, NO_AUTO_VIF)) {
1075 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
1076 NL80211_IFTYPE_STATION, NULL);
1078 wiphy_warn(local->hw.wiphy,
1079 "Failed to add default virtual iface\n");
1085 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1086 result = register_inetaddr_notifier(&local->ifa_notifier);
1091 #if IS_ENABLED(CONFIG_IPV6)
1092 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1093 result = register_inet6addr_notifier(&local->ifa6_notifier);
1100 #if IS_ENABLED(CONFIG_IPV6)
1103 unregister_inetaddr_notifier(&local->ifa_notifier);
1106 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1110 rate_control_deinitialize(local);
1111 ieee80211_remove_interfaces(local);
1114 ieee80211_led_exit(local);
1115 ieee80211_wep_free(local);
1116 destroy_workqueue(local->workqueue);
1118 wiphy_unregister(local->hw.wiphy);
1119 fail_wiphy_register:
1120 if (local->wiphy_ciphers_allocated)
1121 kfree(local->hw.wiphy->cipher_suites);
1122 kfree(local->int_scan_req);
1125 EXPORT_SYMBOL(ieee80211_register_hw);
1127 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1129 struct ieee80211_local *local = hw_to_local(hw);
1131 tasklet_kill(&local->tx_pending_tasklet);
1132 tasklet_kill(&local->tasklet);
1135 unregister_inetaddr_notifier(&local->ifa_notifier);
1137 #if IS_ENABLED(CONFIG_IPV6)
1138 unregister_inet6addr_notifier(&local->ifa6_notifier);
1144 * At this point, interface list manipulations are fine
1145 * because the driver cannot be handing us frames any
1146 * more and the tasklet is killed.
1148 ieee80211_remove_interfaces(local);
1152 cancel_delayed_work_sync(&local->roc_work);
1153 cancel_work_sync(&local->restart_work);
1154 cancel_work_sync(&local->reconfig_filter);
1155 cancel_work_sync(&local->tdls_chsw_work);
1156 flush_work(&local->sched_scan_stopped_work);
1158 ieee80211_clear_tx_pending(local);
1159 rate_control_deinitialize(local);
1161 if (skb_queue_len(&local->skb_queue) ||
1162 skb_queue_len(&local->skb_queue_unreliable))
1163 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1164 skb_queue_purge(&local->skb_queue);
1165 skb_queue_purge(&local->skb_queue_unreliable);
1166 skb_queue_purge(&local->skb_queue_tdls_chsw);
1168 destroy_workqueue(local->workqueue);
1169 wiphy_unregister(local->hw.wiphy);
1170 ieee80211_wep_free(local);
1171 ieee80211_led_exit(local);
1172 kfree(local->int_scan_req);
1174 EXPORT_SYMBOL(ieee80211_unregister_hw);
1176 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1178 WARN_ONCE(1, "Have pending ack frames!\n");
1183 void ieee80211_free_hw(struct ieee80211_hw *hw)
1185 struct ieee80211_local *local = hw_to_local(hw);
1187 mutex_destroy(&local->iflist_mtx);
1188 mutex_destroy(&local->mtx);
1190 if (local->wiphy_ciphers_allocated)
1191 kfree(local->hw.wiphy->cipher_suites);
1193 idr_for_each(&local->ack_status_frames,
1194 ieee80211_free_ack_frame, NULL);
1195 idr_destroy(&local->ack_status_frames);
1197 sta_info_stop(local);
1199 ieee80211_free_led_names(local);
1201 wiphy_free(local->hw.wiphy);
1203 EXPORT_SYMBOL(ieee80211_free_hw);
1205 static int __init ieee80211_init(void)
1207 struct sk_buff *skb;
1210 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1211 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1212 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1214 ret = rc80211_minstrel_init();
1218 ret = rc80211_minstrel_ht_init();
1222 ret = ieee80211_iface_init();
1228 rc80211_minstrel_ht_exit();
1230 rc80211_minstrel_exit();
1235 static void __exit ieee80211_exit(void)
1237 rc80211_minstrel_ht_exit();
1238 rc80211_minstrel_exit();
1242 ieee80211_iface_exit();
1248 subsys_initcall(ieee80211_init);
1249 module_exit(ieee80211_exit);
1251 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1252 MODULE_LICENSE("GPL");