2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/pm_qos.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"
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_promiscs))
44 new_flags |= FIF_PROMISC_IN_BSS;
46 if (atomic_read(&local->iff_allmultis))
47 new_flags |= FIF_ALLMULTI;
49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
51 new_flags |= FIF_BCN_PRBRESP_PROMISC;
53 if (local->fif_probe_req || local->probe_req_reg)
54 new_flags |= FIF_PROBE_REQ;
56 if (local->fif_fcsfail)
57 new_flags |= FIF_FCSFAIL;
59 if (local->fif_plcpfail)
60 new_flags |= FIF_PLCPFAIL;
62 if (local->fif_control)
63 new_flags |= FIF_CONTROL;
65 if (local->fif_other_bss)
66 new_flags |= FIF_OTHER_BSS;
68 if (local->fif_pspoll)
69 new_flags |= FIF_PSPOLL;
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
82 WARN_ON(new_flags & (1<<31));
84 local->filter_flags = new_flags & ~(1<<31);
87 static void ieee80211_reconfig_filter(struct work_struct *work)
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
92 ieee80211_configure_filter(local);
95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
97 struct ieee80211_sub_if_data *sdata;
98 struct cfg80211_chan_def chandef = {};
103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
105 if (local->scan_chandef.chan) {
106 chandef = local->scan_chandef;
107 } else if (local->tmp_channel) {
108 chandef.chan = local->tmp_channel;
109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
110 chandef.center_freq1 = chandef.chan->center_freq;
112 chandef = local->_oper_chandef;
114 WARN(!cfg80211_chandef_valid(&chandef),
115 "control:%d MHz width:%d center: %d/%d MHz",
116 chandef.chan->center_freq, chandef.width,
117 chandef.center_freq1, chandef.center_freq2);
119 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
120 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
122 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
124 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126 if (offchannel_flag ||
127 !cfg80211_chandef_identical(&local->hw.conf.chandef,
128 &local->_oper_chandef)) {
129 local->hw.conf.chandef = chandef;
130 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
133 if (!conf_is_ht(&local->hw.conf)) {
135 * mac80211.h documents that this is only valid
136 * when the channel is set to an HT type, and
137 * that otherwise STATIC is used.
139 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
140 } else if (local->hw.conf.smps_mode != local->smps_mode) {
141 local->hw.conf.smps_mode = local->smps_mode;
142 changed |= IEEE80211_CONF_CHANGE_SMPS;
145 power = ieee80211_chandef_max_power(&chandef);
148 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
149 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
151 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
153 power = min(power, sdata->vif.bss_conf.txpower);
157 if (local->hw.conf.power_level != power) {
158 changed |= IEEE80211_CONF_CHANGE_POWER;
159 local->hw.conf.power_level = power;
165 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
171 if (!local->use_chanctx)
172 changed |= ieee80211_hw_conf_chan(local);
174 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
175 IEEE80211_CONF_CHANGE_POWER);
177 if (changed && local->open_count) {
178 ret = drv_config(local, changed);
181 * HW reconfiguration should never fail, the driver has told
182 * us what it can support so it should live up to that promise.
185 * rfkill is not integrated with mac80211 and a
186 * configuration command can thus fail if hardware rfkill
189 * FIXME: integrate rfkill with mac80211 and then add this
199 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
202 struct ieee80211_local *local = sdata->local;
204 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
207 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
210 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
212 sdata->vif.bss_conf.use_cts_prot = false;
213 sdata->vif.bss_conf.use_short_preamble = false;
214 sdata->vif.bss_conf.use_short_slot = false;
215 return BSS_CHANGED_ERP_CTS_PROT |
216 BSS_CHANGED_ERP_PREAMBLE |
217 BSS_CHANGED_ERP_SLOT;
220 static void ieee80211_tasklet_handler(unsigned long data)
222 struct ieee80211_local *local = (struct ieee80211_local *) data;
225 while ((skb = skb_dequeue(&local->skb_queue)) ||
226 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
227 switch (skb->pkt_type) {
228 case IEEE80211_RX_MSG:
229 /* Clear skb->pkt_type in order to not confuse kernel
232 ieee80211_rx(&local->hw, skb);
234 case IEEE80211_TX_STATUS_MSG:
236 ieee80211_tx_status(&local->hw, skb);
239 WARN(1, "mac80211: Packet is of unknown type %d\n",
247 static void ieee80211_restart_work(struct work_struct *work)
249 struct ieee80211_local *local =
250 container_of(work, struct ieee80211_local, restart_work);
252 /* wait for scan work complete */
253 flush_workqueue(local->workqueue);
255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
256 "%s called with hardware scan in progress\n", __func__);
259 ieee80211_scan_cancel(local);
260 ieee80211_reconfig(local);
264 void ieee80211_restart_hw(struct ieee80211_hw *hw)
266 struct ieee80211_local *local = hw_to_local(hw);
268 trace_api_restart_hw(local);
270 wiphy_info(hw->wiphy,
271 "Hardware restart was requested\n");
273 /* use this reason, ieee80211_reconfig will unblock it */
274 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
275 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 schedule_work(&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),
451 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
452 0xff, 0xff, 0xff, 0xff, 0xff, },
456 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
458 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
459 IEEE80211_VHT_CAP_SHORT_GI_80 |
460 IEEE80211_VHT_CAP_SHORT_GI_160 |
461 IEEE80211_VHT_CAP_RXSTBC_1 |
462 IEEE80211_VHT_CAP_RXSTBC_2 |
463 IEEE80211_VHT_CAP_RXSTBC_3 |
464 IEEE80211_VHT_CAP_RXSTBC_4 |
465 IEEE80211_VHT_CAP_TXSTBC |
466 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
467 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
468 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
469 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
470 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
472 .rx_mcs_map = cpu_to_le16(~0),
473 .tx_mcs_map = cpu_to_le16(~0),
477 static const u8 extended_capabilities[] = {
479 WLAN_EXT_CAPA8_OPMODE_NOTIF,
482 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
483 const struct ieee80211_ops *ops)
485 struct ieee80211_local *local;
490 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
491 !ops->add_interface || !ops->remove_interface ||
492 !ops->configure_filter))
495 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
498 /* check all or no channel context operations exist */
499 i = !!ops->add_chanctx + !!ops->remove_chanctx +
500 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
501 !!ops->unassign_vif_chanctx;
502 if (WARN_ON(i != 0 && i != 5))
504 use_chanctx = i == 5;
506 /* Ensure 32-byte alignment of our private data and hw private data.
507 * We use the wiphy priv data for both our ieee80211_local and for
508 * the driver's private data
510 * In memory it'll be like this:
512 * +-------------------------+
514 * +-------------------------+
515 * | struct ieee80211_local |
516 * +-------------------------+
517 * | driver's private data |
518 * +-------------------------+
521 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
523 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
528 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
530 wiphy->privid = mac80211_wiphy_privid;
532 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
533 WIPHY_FLAG_4ADDR_AP |
534 WIPHY_FLAG_4ADDR_STATION |
535 WIPHY_FLAG_REPORTS_OBSS |
536 WIPHY_FLAG_OFFCHAN_TX;
538 wiphy->extended_capabilities = extended_capabilities;
539 wiphy->extended_capabilities_mask = extended_capabilities;
540 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
542 if (ops->remain_on_channel)
543 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
545 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
546 NL80211_FEATURE_SAE |
547 NL80211_FEATURE_HT_IBSS |
548 NL80211_FEATURE_VIF_TXPOWER |
549 NL80211_FEATURE_USERSPACE_MPM;
552 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
553 NL80211_FEATURE_AP_SCAN;
557 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
559 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
561 local = wiphy_priv(wiphy);
563 local->hw.wiphy = wiphy;
565 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
568 local->use_chanctx = use_chanctx;
570 /* set up some defaults */
571 local->hw.queues = 1;
572 local->hw.max_rates = 1;
573 local->hw.max_report_rates = 0;
574 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
575 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
576 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
577 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
578 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
579 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
580 IEEE80211_RADIOTAP_MCS_HAVE_GI |
581 IEEE80211_RADIOTAP_MCS_HAVE_BW;
582 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
583 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
584 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
585 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
586 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
587 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
588 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
590 INIT_LIST_HEAD(&local->interfaces);
592 __hw_addr_init(&local->mc_list);
594 mutex_init(&local->iflist_mtx);
595 mutex_init(&local->mtx);
597 mutex_init(&local->key_mtx);
598 spin_lock_init(&local->filter_lock);
599 spin_lock_init(&local->rx_path_lock);
600 spin_lock_init(&local->queue_stop_reason_lock);
602 INIT_LIST_HEAD(&local->chanctx_list);
603 mutex_init(&local->chanctx_mtx);
605 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
607 INIT_WORK(&local->restart_work, ieee80211_restart_work);
609 INIT_WORK(&local->radar_detected_work,
610 ieee80211_dfs_radar_detected_work);
612 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
613 local->smps_mode = IEEE80211_SMPS_OFF;
615 INIT_WORK(&local->dynamic_ps_enable_work,
616 ieee80211_dynamic_ps_enable_work);
617 INIT_WORK(&local->dynamic_ps_disable_work,
618 ieee80211_dynamic_ps_disable_work);
619 setup_timer(&local->dynamic_ps_timer,
620 ieee80211_dynamic_ps_timer, (unsigned long) local);
622 INIT_WORK(&local->sched_scan_stopped_work,
623 ieee80211_sched_scan_stopped_work);
625 spin_lock_init(&local->ack_status_lock);
626 idr_init(&local->ack_status_frames);
628 sta_info_init(local);
630 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
631 skb_queue_head_init(&local->pending[i]);
632 atomic_set(&local->agg_queue_stop[i], 0);
634 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
635 (unsigned long)local);
637 tasklet_init(&local->tasklet,
638 ieee80211_tasklet_handler,
639 (unsigned long) local);
641 skb_queue_head_init(&local->skb_queue);
642 skb_queue_head_init(&local->skb_queue_unreliable);
644 ieee80211_led_names(local);
646 ieee80211_roc_setup(local);
650 EXPORT_SYMBOL(ieee80211_alloc_hw);
652 static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
654 bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
655 IS_ERR(local->wep_rx_tfm));
656 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
657 const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes;
658 int n_suites = 0, r = 0, w = 0;
660 static const u32 cipher_suites[] = {
661 /* keep WEP first, it may be removed below */
662 WLAN_CIPHER_SUITE_WEP40,
663 WLAN_CIPHER_SUITE_WEP104,
664 WLAN_CIPHER_SUITE_TKIP,
665 WLAN_CIPHER_SUITE_CCMP,
667 /* keep last -- depends on hw flags! */
668 WLAN_CIPHER_SUITE_AES_CMAC
671 /* Driver specifies the ciphers, we have nothing to do... */
672 if (local->hw.wiphy->cipher_suites && have_wep)
675 /* Set up cipher suites if driver relies on mac80211 cipher defs */
676 if (!local->hw.wiphy->cipher_suites && !cs) {
677 local->hw.wiphy->cipher_suites = cipher_suites;
678 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
681 local->hw.wiphy->n_cipher_suites--;
684 local->hw.wiphy->cipher_suites += 2;
685 local->hw.wiphy->n_cipher_suites -= 2;
691 if (!local->hw.wiphy->cipher_suites) {
693 * Driver specifies cipher schemes only
694 * We start counting ciphers defined by schemes, TKIP and CCMP
696 n_suites = local->hw.n_cipher_schemes + 2;
698 /* check if we have WEP40 and WEP104 */
702 /* check if we have AES_CMAC */
706 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
710 suites[w++] = WLAN_CIPHER_SUITE_CCMP;
711 suites[w++] = WLAN_CIPHER_SUITE_TKIP;
714 suites[w++] = WLAN_CIPHER_SUITE_WEP40;
715 suites[w++] = WLAN_CIPHER_SUITE_WEP104;
719 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
721 for (r = 0; r < local->hw.n_cipher_schemes; r++)
722 suites[w++] = cs[r].cipher;
724 /* Driver provides cipher suites, but we need to exclude WEP */
725 suites = kmemdup(local->hw.wiphy->cipher_suites,
726 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
731 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
732 u32 suite = local->hw.wiphy->cipher_suites[r];
734 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
735 suite == WLAN_CIPHER_SUITE_WEP104)
741 local->hw.wiphy->cipher_suites = suites;
742 local->hw.wiphy->n_cipher_suites = w;
743 local->wiphy_ciphers_allocated = true;
748 int ieee80211_register_hw(struct ieee80211_hw *hw)
750 struct ieee80211_local *local = hw_to_local(hw);
752 enum ieee80211_band band;
753 int channels, max_bitrates;
754 bool supp_ht, supp_vht;
755 netdev_features_t feature_whitelist;
756 struct cfg80211_chan_def dflt_chandef = {};
758 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
759 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
760 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
764 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
768 if (!local->use_chanctx) {
769 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
770 const struct ieee80211_iface_combination *comb;
772 comb = &local->hw.wiphy->iface_combinations[i];
774 if (comb->num_different_channels > 1)
779 * WDS is currently prohibited when channel contexts are used
780 * because there's no clear definition of which channel WDS
781 * type interfaces use
783 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
786 /* DFS currently not supported with channel context drivers */
787 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
788 const struct ieee80211_iface_combination *comb;
790 comb = &local->hw.wiphy->iface_combinations[i];
792 if (comb->radar_detect_widths)
797 /* Only HW csum features are currently compatible with mac80211 */
798 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
800 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
803 if (hw->max_report_rates == 0)
804 hw->max_report_rates = hw->max_rates;
806 local->rx_chains = 1;
809 * generic code guarantees at least one band,
810 * set this very early because much code assumes
811 * that hw.conf.channel is assigned
817 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
818 struct ieee80211_supported_band *sband;
820 sband = local->hw.wiphy->bands[band];
824 if (!dflt_chandef.chan) {
825 cfg80211_chandef_create(&dflt_chandef,
828 /* init channel we're on */
829 if (!local->use_chanctx && !local->_oper_chandef.chan) {
830 local->hw.conf.chandef = dflt_chandef;
831 local->_oper_chandef = dflt_chandef;
833 local->monitor_chandef = dflt_chandef;
836 channels += sband->n_channels;
838 if (max_bitrates < sband->n_bitrates)
839 max_bitrates = sband->n_bitrates;
840 supp_ht = supp_ht || sband->ht_cap.ht_supported;
841 supp_vht = supp_vht || sband->vht_cap.vht_supported;
843 if (sband->ht_cap.ht_supported)
845 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
848 /* TODO: consider VHT for RX chains, hopefully it's the same */
851 /* if low-level driver supports AP, we also support VLAN */
852 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
853 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
854 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
857 /* mac80211 always supports monitor */
858 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
859 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
861 /* mac80211 doesn't support more than one IBSS interface right now */
862 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
863 const struct ieee80211_iface_combination *c;
866 c = &hw->wiphy->iface_combinations[i];
868 for (j = 0; j < c->n_limits; j++)
869 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
870 c->limits[j].max > 1)
874 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
875 sizeof(void *) * channels, GFP_KERNEL);
876 if (!local->int_scan_req)
879 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
880 if (!local->hw.wiphy->bands[band])
882 local->int_scan_req->rates[band] = (u32) -1;
885 #ifndef CONFIG_MAC80211_MESH
886 /* mesh depends on Kconfig, but drivers should set it if they want */
887 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
890 /* if the underlying driver supports mesh, mac80211 will (at least)
891 * provide routing of mesh authentication frames to userspace */
892 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
893 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
895 /* mac80211 supports control port protocol changing */
896 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
898 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
899 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
900 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
901 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
902 if (hw->max_signal <= 0) {
904 goto fail_wiphy_register;
908 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
909 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
910 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
913 * Calculate scan IE length -- we need this to alloc
914 * memory and to subtract from the driver limit. It
915 * includes the DS Params, (extended) supported rates, and HT
916 * information -- SSID is the driver's responsibility.
918 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
921 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
924 local->scan_ies_len +=
925 2 + sizeof(struct ieee80211_vht_cap);
927 if (!local->ops->hw_scan) {
928 /* For hw_scan, driver needs to set these up. */
929 local->hw.wiphy->max_scan_ssids = 4;
930 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
934 * If the driver supports any scan IEs, then assume the
935 * limit includes the IEs mac80211 will add, otherwise
936 * leave it at zero and let the driver sort it out; we
937 * still pass our IEs to the driver but userspace will
938 * not be allowed to in that case.
940 if (local->hw.wiphy->max_scan_ie_len)
941 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
943 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
944 local->hw.n_cipher_schemes));
946 result = ieee80211_init_cipher_suites(local);
948 goto fail_wiphy_register;
950 if (!local->ops->remain_on_channel)
951 local->hw.wiphy->max_remain_on_channel_duration = 5000;
953 /* mac80211 based drivers don't support internal TDLS setup */
954 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
955 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
957 result = wiphy_register(local->hw.wiphy);
959 goto fail_wiphy_register;
962 * We use the number of queues for feature tests (QoS, HT) internally
963 * so restrict them appropriately.
965 if (hw->queues > IEEE80211_MAX_QUEUES)
966 hw->queues = IEEE80211_MAX_QUEUES;
969 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
970 if (!local->workqueue) {
976 * The hardware needs headroom for sending the frame,
977 * and we need some headroom for passing the frame to monitor
978 * interfaces, but never both at the same time.
980 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
981 IEEE80211_TX_STATUS_HEADROOM);
983 debugfs_hw_add(local);
986 * if the driver doesn't specify a max listen interval we
987 * use 5 which should be a safe default
989 if (local->hw.max_listen_interval == 0)
990 local->hw.max_listen_interval = 5;
992 local->hw.conf.listen_interval = local->hw.max_listen_interval;
994 local->dynamic_ps_forced_timeout = -1;
996 result = ieee80211_wep_init(local);
998 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
1001 local->hw.conf.flags = IEEE80211_CONF_IDLE;
1003 ieee80211_led_init(local);
1007 result = ieee80211_init_rate_ctrl_alg(local,
1008 hw->rate_control_algorithm);
1010 wiphy_debug(local->hw.wiphy,
1011 "Failed to initialize rate control algorithm\n");
1015 /* add one default STA interface if supported */
1016 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
1017 result = ieee80211_if_add(local, "wlan%d", NULL,
1018 NL80211_IFTYPE_STATION, NULL);
1020 wiphy_warn(local->hw.wiphy,
1021 "Failed to add default virtual iface\n");
1026 local->network_latency_notifier.notifier_call =
1027 ieee80211_max_network_latency;
1028 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
1029 &local->network_latency_notifier);
1036 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
1037 result = register_inetaddr_notifier(&local->ifa_notifier);
1042 #if IS_ENABLED(CONFIG_IPV6)
1043 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
1044 result = register_inet6addr_notifier(&local->ifa6_notifier);
1051 #if IS_ENABLED(CONFIG_IPV6)
1054 unregister_inetaddr_notifier(&local->ifa_notifier);
1057 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1059 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1060 &local->network_latency_notifier);
1064 ieee80211_led_exit(local);
1065 ieee80211_remove_interfaces(local);
1068 ieee80211_wep_free(local);
1069 sta_info_stop(local);
1070 destroy_workqueue(local->workqueue);
1072 wiphy_unregister(local->hw.wiphy);
1073 fail_wiphy_register:
1074 if (local->wiphy_ciphers_allocated)
1075 kfree(local->hw.wiphy->cipher_suites);
1076 kfree(local->int_scan_req);
1079 EXPORT_SYMBOL(ieee80211_register_hw);
1081 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi,
1082 struct net_device *napi_dev,
1083 int (*poll)(struct napi_struct *, int),
1086 struct ieee80211_local *local = hw_to_local(hw);
1088 netif_napi_add(napi_dev, napi, poll, weight);
1091 EXPORT_SYMBOL_GPL(ieee80211_napi_add);
1093 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1095 struct ieee80211_local *local = hw_to_local(hw);
1097 tasklet_kill(&local->tx_pending_tasklet);
1098 tasklet_kill(&local->tasklet);
1100 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1101 &local->network_latency_notifier);
1103 unregister_inetaddr_notifier(&local->ifa_notifier);
1105 #if IS_ENABLED(CONFIG_IPV6)
1106 unregister_inet6addr_notifier(&local->ifa6_notifier);
1112 * At this point, interface list manipulations are fine
1113 * because the driver cannot be handing us frames any
1114 * more and the tasklet is killed.
1116 ieee80211_remove_interfaces(local);
1120 cancel_work_sync(&local->restart_work);
1121 cancel_work_sync(&local->reconfig_filter);
1122 flush_work(&local->sched_scan_stopped_work);
1124 ieee80211_clear_tx_pending(local);
1125 rate_control_deinitialize(local);
1127 if (skb_queue_len(&local->skb_queue) ||
1128 skb_queue_len(&local->skb_queue_unreliable))
1129 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1130 skb_queue_purge(&local->skb_queue);
1131 skb_queue_purge(&local->skb_queue_unreliable);
1133 destroy_workqueue(local->workqueue);
1134 wiphy_unregister(local->hw.wiphy);
1135 sta_info_stop(local);
1136 ieee80211_wep_free(local);
1137 ieee80211_led_exit(local);
1138 kfree(local->int_scan_req);
1140 EXPORT_SYMBOL(ieee80211_unregister_hw);
1142 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1144 WARN_ONCE(1, "Have pending ack frames!\n");
1149 void ieee80211_free_hw(struct ieee80211_hw *hw)
1151 struct ieee80211_local *local = hw_to_local(hw);
1153 mutex_destroy(&local->iflist_mtx);
1154 mutex_destroy(&local->mtx);
1156 if (local->wiphy_ciphers_allocated)
1157 kfree(local->hw.wiphy->cipher_suites);
1159 idr_for_each(&local->ack_status_frames,
1160 ieee80211_free_ack_frame, NULL);
1161 idr_destroy(&local->ack_status_frames);
1163 kfree(rcu_access_pointer(local->tx_latency));
1165 wiphy_free(local->hw.wiphy);
1167 EXPORT_SYMBOL(ieee80211_free_hw);
1169 static int __init ieee80211_init(void)
1171 struct sk_buff *skb;
1174 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1175 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1176 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1178 ret = rc80211_minstrel_init();
1182 ret = rc80211_minstrel_ht_init();
1186 ret = rc80211_pid_init();
1190 ret = ieee80211_iface_init();
1198 rc80211_minstrel_ht_exit();
1200 rc80211_minstrel_exit();
1205 static void __exit ieee80211_exit(void)
1208 rc80211_minstrel_ht_exit();
1209 rc80211_minstrel_exit();
1213 ieee80211_iface_exit();
1219 subsys_initcall(ieee80211_init);
1220 module_exit(ieee80211_exit);
1222 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1223 MODULE_LICENSE("GPL");