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 <net/ieee80211_radiotap.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/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <linux/pm_qos_params.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
38 #include "debugfs_netdev.h"
41 * For seeing transmitted packets on monitor interfaces
42 * we have a radiotap header too.
44 struct ieee80211_tx_status_rtap_hdr {
45 struct ieee80211_radiotap_header hdr;
50 } __attribute__ ((packed));
53 void ieee80211_configure_filter(struct ieee80211_local *local)
56 unsigned int changed_flags;
57 unsigned int new_flags = 0;
59 if (atomic_read(&local->iff_promiscs))
60 new_flags |= FIF_PROMISC_IN_BSS;
62 if (atomic_read(&local->iff_allmultis))
63 new_flags |= FIF_ALLMULTI;
65 if (local->monitors || local->scanning)
66 new_flags |= FIF_BCN_PRBRESP_PROMISC;
68 if (local->fif_fcsfail)
69 new_flags |= FIF_FCSFAIL;
71 if (local->fif_plcpfail)
72 new_flags |= FIF_PLCPFAIL;
74 if (local->fif_control)
75 new_flags |= FIF_CONTROL;
77 if (local->fif_other_bss)
78 new_flags |= FIF_OTHER_BSS;
80 if (local->fif_pspoll)
81 new_flags |= FIF_PSPOLL;
83 spin_lock_bh(&local->filter_lock);
84 changed_flags = local->filter_flags ^ new_flags;
86 mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
87 spin_unlock_bh(&local->filter_lock);
92 drv_configure_filter(local, changed_flags, &new_flags, mc);
94 WARN_ON(new_flags & (1<<31));
96 local->filter_flags = new_flags & ~(1<<31);
99 static void ieee80211_reconfig_filter(struct work_struct *work)
101 struct ieee80211_local *local =
102 container_of(work, struct ieee80211_local, reconfig_filter);
104 ieee80211_configure_filter(local);
107 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
109 struct ieee80211_channel *chan, *scan_chan;
112 enum nl80211_channel_type channel_type;
116 scan_chan = local->scan_channel;
120 channel_type = NL80211_CHAN_NO_HT;
122 chan = local->oper_channel;
123 channel_type = local->oper_channel_type;
126 if (chan != local->hw.conf.channel ||
127 channel_type != local->hw.conf.channel_type) {
128 local->hw.conf.channel = chan;
129 local->hw.conf.channel_type = channel_type;
130 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
134 power = chan->max_power;
136 power = local->power_constr_level ?
137 (chan->max_power - local->power_constr_level) :
140 if (local->user_power_level >= 0)
141 power = min(power, local->user_power_level);
143 if (local->hw.conf.power_level != power) {
144 changed |= IEEE80211_CONF_CHANGE_POWER;
145 local->hw.conf.power_level = power;
148 if (changed && local->open_count) {
149 ret = drv_config(local, changed);
152 * HW reconfiguration should never fail, the driver has told
153 * us what it can support so it should live up to that promise.
156 * rfkill is not integrated with mac80211 and a
157 * configuration command can thus fail if hardware rfkill
160 * FIXME: integrate rfkill with mac80211 and then add this
170 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
173 struct ieee80211_local *local = sdata->local;
174 static const u8 zero[ETH_ALEN] = { 0 };
179 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
181 * While not associated, claim a BSSID of all-zeroes
182 * so that drivers don't do any weird things with the
183 * BSSID at that time.
185 if (sdata->vif.bss_conf.assoc)
186 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
188 sdata->vif.bss_conf.bssid = zero;
189 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
190 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
191 else if (sdata->vif.type == NL80211_IFTYPE_AP)
192 sdata->vif.bss_conf.bssid = sdata->dev->dev_addr;
193 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
194 sdata->vif.bss_conf.bssid = zero;
200 switch (sdata->vif.type) {
201 case NL80211_IFTYPE_AP:
202 case NL80211_IFTYPE_ADHOC:
203 case NL80211_IFTYPE_MESH_POINT:
206 /* do not warn to simplify caller in scan.c */
207 changed &= ~BSS_CHANGED_BEACON_ENABLED;
208 if (WARN_ON(changed & BSS_CHANGED_BEACON))
213 if (changed & BSS_CHANGED_BEACON_ENABLED) {
214 if (local->quiescing || !netif_running(sdata->dev) ||
215 test_bit(SCAN_SW_SCANNING, &local->scanning)) {
216 sdata->vif.bss_conf.enable_beacon = false;
219 * Beacon should be enabled, but AP mode must
220 * check whether there is a beacon configured.
222 switch (sdata->vif.type) {
223 case NL80211_IFTYPE_AP:
224 sdata->vif.bss_conf.enable_beacon =
225 !!rcu_dereference(sdata->u.ap.beacon);
227 case NL80211_IFTYPE_ADHOC:
228 sdata->vif.bss_conf.enable_beacon =
229 !!rcu_dereference(sdata->u.ibss.presp);
231 case NL80211_IFTYPE_MESH_POINT:
232 sdata->vif.bss_conf.enable_beacon = true;
242 drv_bss_info_changed(local, &sdata->vif,
243 &sdata->vif.bss_conf, changed);
246 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
248 sdata->vif.bss_conf.use_cts_prot = false;
249 sdata->vif.bss_conf.use_short_preamble = false;
250 sdata->vif.bss_conf.use_short_slot = false;
251 return BSS_CHANGED_ERP_CTS_PROT |
252 BSS_CHANGED_ERP_PREAMBLE |
253 BSS_CHANGED_ERP_SLOT;
256 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
259 struct ieee80211_local *local = hw_to_local(hw);
260 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
263 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
264 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
265 &local->skb_queue : &local->skb_queue_unreliable, skb);
266 tmp = skb_queue_len(&local->skb_queue) +
267 skb_queue_len(&local->skb_queue_unreliable);
268 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
269 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
270 dev_kfree_skb_irq(skb);
272 I802_DEBUG_INC(local->tx_status_drop);
274 tasklet_schedule(&local->tasklet);
276 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
278 static void ieee80211_tasklet_handler(unsigned long data)
280 struct ieee80211_local *local = (struct ieee80211_local *) data;
282 struct ieee80211_ra_tid *ra_tid;
284 while ((skb = skb_dequeue(&local->skb_queue)) ||
285 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
286 switch (skb->pkt_type) {
287 case IEEE80211_RX_MSG:
288 /* Clear skb->pkt_type in order to not confuse kernel
291 ieee80211_rx(local_to_hw(local), skb);
293 case IEEE80211_TX_STATUS_MSG:
295 ieee80211_tx_status(local_to_hw(local), skb);
297 case IEEE80211_DELBA_MSG:
298 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
299 ieee80211_stop_tx_ba_cb(local_to_hw(local),
300 ra_tid->ra, ra_tid->tid);
303 case IEEE80211_ADDBA_MSG:
304 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
305 ieee80211_start_tx_ba_cb(local_to_hw(local),
306 ra_tid->ra, ra_tid->tid);
310 WARN(1, "mac80211: Packet is of unknown type %d\n",
318 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
319 struct sta_info *sta,
322 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
325 * XXX: This is temporary!
327 * The problem here is that when we get here, the driver will
328 * quite likely have pretty much overwritten info->control by
329 * using info->driver_data or info->rate_driver_data. Thus,
330 * when passing out the frame to the driver again, we would be
331 * passing completely bogus data since the driver would then
332 * expect a properly filled info->control. In mac80211 itself
333 * the same problem occurs, since we need info->control.vif
336 * To fix this, we should send the frame through TX processing
337 * again. However, it's not that simple, since the frame will
338 * have been software-encrypted (if applicable) already, and
339 * encrypting it again doesn't do much good. So to properly do
340 * that, we not only have to skip the actual 'raw' encryption
341 * (key selection etc. still has to be done!) but also the
342 * sequence number assignment since that impacts the crypto
343 * encapsulation, of course.
345 * Hence, for now, fix the bug by just dropping the frame.
349 sta->tx_filtered_count++;
352 * Clear the TX filter mask for this STA when sending the next
353 * packet. If the STA went to power save mode, this will happen
354 * when it wakes up for the next time.
356 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
359 * This code races in the following way:
361 * (1) STA sends frame indicating it will go to sleep and does so
362 * (2) hardware/firmware adds STA to filter list, passes frame up
363 * (3) hardware/firmware processes TX fifo and suppresses a frame
364 * (4) we get TX status before having processed the frame and
365 * knowing that the STA has gone to sleep.
367 * This is actually quite unlikely even when both those events are
368 * processed from interrupts coming in quickly after one another or
369 * even at the same time because we queue both TX status events and
370 * RX frames to be processed by a tasklet and process them in the
371 * same order that they were received or TX status last. Hence, there
372 * is no race as long as the frame RX is processed before the next TX
373 * status, which drivers can ensure, see below.
375 * Note that this can only happen if the hardware or firmware can
376 * actually add STAs to the filter list, if this is done by the
377 * driver in response to set_tim() (which will only reduce the race
378 * this whole filtering tries to solve, not completely solve it)
379 * this situation cannot happen.
381 * To completely solve this race drivers need to make sure that they
382 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
384 * (b) always process RX events before TX status events if ordering
385 * can be unknown, for example with different interrupt status
388 if (test_sta_flags(sta, WLAN_STA_PS) &&
389 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
390 skb_queue_tail(&sta->tx_filtered, skb);
394 if (!test_sta_flags(sta, WLAN_STA_PS) &&
395 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
396 /* Software retry the packet once */
397 info->flags |= IEEE80211_TX_INTFL_RETRIED;
398 ieee80211_add_pending_skb(local, skb);
403 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
405 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
406 "queue_len=%d PS=%d @%lu\n",
407 wiphy_name(local->hw.wiphy),
408 skb_queue_len(&sta->tx_filtered),
409 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
414 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
416 struct sk_buff *skb2;
417 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
418 struct ieee80211_local *local = hw_to_local(hw);
419 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
422 struct ieee80211_supported_band *sband;
423 struct ieee80211_tx_status_rtap_hdr *rthdr;
424 struct ieee80211_sub_if_data *sdata;
425 struct net_device *prev_dev = NULL;
426 struct sta_info *sta;
427 int retry_count = -1, i;
429 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
430 /* the HW cannot have attempted that rate */
431 if (i >= hw->max_rates) {
432 info->status.rates[i].idx = -1;
433 info->status.rates[i].count = 0;
436 retry_count += info->status.rates[i].count;
443 sband = local->hw.wiphy->bands[info->band];
444 fc = hdr->frame_control;
446 sta = sta_info_get(local, hdr->addr1);
449 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
450 test_sta_flags(sta, WLAN_STA_PS)) {
452 * The STA is in power save mode, so assume
453 * that this TX packet failed because of that.
455 ieee80211_handle_filtered_frame(local, sta, skb);
460 fc = hdr->frame_control;
462 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
463 (ieee80211_is_data_qos(fc))) {
467 qc = ieee80211_get_qos_ctl(hdr);
469 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
470 & IEEE80211_SCTL_SEQ);
471 ieee80211_send_bar(sta->sdata, hdr->addr1,
475 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
476 ieee80211_handle_filtered_frame(local, sta, skb);
480 if (!(info->flags & IEEE80211_TX_STAT_ACK))
481 sta->tx_retry_failed++;
482 sta->tx_retry_count += retry_count;
485 rate_control_tx_status(local, sband, sta, skb);
486 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
487 ieee80211s_update_metric(local, sta, skb);
492 ieee80211_led_tx(local, 0);
495 * Fragments are passed to low-level drivers as separate skbs, so these
496 * are actually fragments, not frames. Update frame counters only for
497 * the first fragment of the frame. */
499 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
500 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
502 if (info->flags & IEEE80211_TX_STAT_ACK) {
504 local->dot11TransmittedFrameCount++;
505 if (is_multicast_ether_addr(hdr->addr1))
506 local->dot11MulticastTransmittedFrameCount++;
508 local->dot11RetryCount++;
510 local->dot11MultipleRetryCount++;
513 /* This counter shall be incremented for an acknowledged MPDU
514 * with an individual address in the address 1 field or an MPDU
515 * with a multicast address in the address 1 field of type Data
517 if (!is_multicast_ether_addr(hdr->addr1) ||
518 type == IEEE80211_FTYPE_DATA ||
519 type == IEEE80211_FTYPE_MGMT)
520 local->dot11TransmittedFragmentCount++;
523 local->dot11FailedCount++;
526 if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) &&
527 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
528 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
529 local->ps_sdata && !(local->scanning)) {
530 if (info->flags & IEEE80211_TX_STAT_ACK) {
531 local->ps_sdata->u.mgd.flags |=
532 IEEE80211_STA_NULLFUNC_ACKED;
533 ieee80211_queue_work(&local->hw,
534 &local->dynamic_ps_enable_work);
536 mod_timer(&local->dynamic_ps_timer, jiffies +
537 msecs_to_jiffies(10));
540 /* this was a transmitted frame, but now we want to reuse it */
544 * This is a bit racy but we can avoid a lot of work
547 if (!local->monitors && !local->cooked_mntrs) {
552 /* send frame to monitor interfaces now */
554 if (skb_headroom(skb) < sizeof(*rthdr)) {
555 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
560 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
561 skb_push(skb, sizeof(*rthdr));
563 memset(rthdr, 0, sizeof(*rthdr));
564 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
565 rthdr->hdr.it_present =
566 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
567 (1 << IEEE80211_RADIOTAP_DATA_RETRIES) |
568 (1 << IEEE80211_RADIOTAP_RATE));
570 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
571 !is_multicast_ether_addr(hdr->addr1))
572 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
575 * XXX: Once radiotap gets the bitmap reset thing the vendor
576 * extensions proposal contains, we can actually report
577 * the whole set of tries we did.
579 if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
580 (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
581 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
582 else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
583 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
584 if (info->status.rates[0].idx >= 0 &&
585 !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
586 rthdr->rate = sband->bitrates[
587 info->status.rates[0].idx].bitrate / 5;
589 /* for now report the total retry_count */
590 rthdr->data_retries = retry_count;
592 /* XXX: is this sufficient for BPF? */
593 skb_set_mac_header(skb, 0);
594 skb->ip_summed = CHECKSUM_UNNECESSARY;
595 skb->pkt_type = PACKET_OTHERHOST;
596 skb->protocol = htons(ETH_P_802_2);
597 memset(skb->cb, 0, sizeof(skb->cb));
600 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
601 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
602 if (!netif_running(sdata->dev))
606 skb2 = skb_clone(skb, GFP_ATOMIC);
608 skb2->dev = prev_dev;
613 prev_dev = sdata->dev;
624 EXPORT_SYMBOL(ieee80211_tx_status);
626 static void ieee80211_restart_work(struct work_struct *work)
628 struct ieee80211_local *local =
629 container_of(work, struct ieee80211_local, restart_work);
632 ieee80211_reconfig(local);
636 void ieee80211_restart_hw(struct ieee80211_hw *hw)
638 struct ieee80211_local *local = hw_to_local(hw);
640 /* use this reason, __ieee80211_resume will unblock it */
641 ieee80211_stop_queues_by_reason(hw,
642 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
644 schedule_work(&local->restart_work);
646 EXPORT_SYMBOL(ieee80211_restart_hw);
648 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
649 const struct ieee80211_ops *ops)
651 struct ieee80211_local *local;
655 /* Ensure 32-byte alignment of our private data and hw private data.
656 * We use the wiphy priv data for both our ieee80211_local and for
657 * the driver's private data
659 * In memory it'll be like this:
661 * +-------------------------+
663 * +-------------------------+
664 * | struct ieee80211_local |
665 * +-------------------------+
666 * | driver's private data |
667 * +-------------------------+
670 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
672 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
677 wiphy->netnsok = true;
678 wiphy->privid = mac80211_wiphy_privid;
680 /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
681 wiphy->bss_priv_size = sizeof(struct ieee80211_bss) -
682 sizeof(struct cfg80211_bss);
684 local = wiphy_priv(wiphy);
686 local->hw.wiphy = wiphy;
688 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
693 BUG_ON(!ops->config);
694 BUG_ON(!ops->add_interface);
695 BUG_ON(!ops->remove_interface);
696 BUG_ON(!ops->configure_filter);
699 /* set up some defaults */
700 local->hw.queues = 1;
701 local->hw.max_rates = 1;
702 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
703 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
704 local->user_power_level = -1;
706 INIT_LIST_HEAD(&local->interfaces);
707 mutex_init(&local->iflist_mtx);
708 mutex_init(&local->scan_mtx);
710 spin_lock_init(&local->key_lock);
711 spin_lock_init(&local->filter_lock);
712 spin_lock_init(&local->queue_stop_reason_lock);
714 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
716 INIT_WORK(&local->restart_work, ieee80211_restart_work);
718 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
720 INIT_WORK(&local->dynamic_ps_enable_work,
721 ieee80211_dynamic_ps_enable_work);
722 INIT_WORK(&local->dynamic_ps_disable_work,
723 ieee80211_dynamic_ps_disable_work);
724 setup_timer(&local->dynamic_ps_timer,
725 ieee80211_dynamic_ps_timer, (unsigned long) local);
727 sta_info_init(local);
729 for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
730 skb_queue_head_init(&local->pending[i]);
731 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
732 (unsigned long)local);
734 tasklet_init(&local->tasklet,
735 ieee80211_tasklet_handler,
736 (unsigned long) local);
738 skb_queue_head_init(&local->skb_queue);
739 skb_queue_head_init(&local->skb_queue_unreliable);
741 spin_lock_init(&local->ampdu_lock);
743 return local_to_hw(local);
745 EXPORT_SYMBOL(ieee80211_alloc_hw);
747 int ieee80211_register_hw(struct ieee80211_hw *hw)
749 struct ieee80211_local *local = hw_to_local(hw);
751 enum ieee80211_band band;
752 int channels, i, j, max_bitrates;
754 static const u32 cipher_suites[] = {
755 WLAN_CIPHER_SUITE_WEP40,
756 WLAN_CIPHER_SUITE_WEP104,
757 WLAN_CIPHER_SUITE_TKIP,
758 WLAN_CIPHER_SUITE_CCMP,
760 /* keep last -- depends on hw flags! */
761 WLAN_CIPHER_SUITE_AES_CMAC
765 * generic code guarantees at least one band,
766 * set this very early because much code assumes
767 * that hw.conf.channel is assigned
772 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
773 struct ieee80211_supported_band *sband;
775 sband = local->hw.wiphy->bands[band];
778 if (!local->oper_channel) {
779 /* init channel we're on */
780 local->hw.conf.channel =
781 local->oper_channel = &sband->channels[0];
782 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
784 channels += sband->n_channels;
786 if (max_bitrates < sband->n_bitrates)
787 max_bitrates = sband->n_bitrates;
788 supp_ht = supp_ht || sband->ht_cap.ht_supported;
791 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
792 sizeof(void *) * channels, GFP_KERNEL);
793 if (!local->int_scan_req)
796 /* if low-level driver supports AP, we also support VLAN */
797 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
798 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
800 /* mac80211 always supports monitor */
801 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
803 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
804 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
805 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
806 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
809 * Calculate scan IE length -- we need this to alloc
810 * memory and to subtract from the driver limit. It
811 * includes the (extended) supported rates and HT
812 * information -- SSID is the driver's responsibility.
814 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
816 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
818 if (!local->ops->hw_scan) {
819 /* For hw_scan, driver needs to set these up. */
820 local->hw.wiphy->max_scan_ssids = 4;
821 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
825 * If the driver supports any scan IEs, then assume the
826 * limit includes the IEs mac80211 will add, otherwise
827 * leave it at zero and let the driver sort it out; we
828 * still pass our IEs to the driver but userspace will
829 * not be allowed to in that case.
831 if (local->hw.wiphy->max_scan_ie_len)
832 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
834 local->hw.wiphy->cipher_suites = cipher_suites;
835 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
836 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
837 local->hw.wiphy->n_cipher_suites--;
839 result = wiphy_register(local->hw.wiphy);
841 goto fail_wiphy_register;
844 * We use the number of queues for feature tests (QoS, HT) internally
845 * so restrict them appropriately.
847 if (hw->queues > IEEE80211_MAX_QUEUES)
848 hw->queues = IEEE80211_MAX_QUEUES;
851 create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
852 if (!local->workqueue) {
858 * The hardware needs headroom for sending the frame,
859 * and we need some headroom for passing the frame to monitor
860 * interfaces, but never both at the same time.
862 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
863 sizeof(struct ieee80211_tx_status_rtap_hdr));
864 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
865 sizeof(struct ieee80211_tx_status_rtap_hdr));
867 debugfs_hw_add(local);
869 if (local->hw.max_listen_interval == 0)
870 local->hw.max_listen_interval = 1;
872 local->hw.conf.listen_interval = local->hw.max_listen_interval;
874 result = sta_info_start(local);
878 result = ieee80211_wep_init(local);
880 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
881 wiphy_name(local->hw.wiphy), result);
887 result = ieee80211_init_rate_ctrl_alg(local,
888 hw->rate_control_algorithm);
890 printk(KERN_DEBUG "%s: Failed to initialize rate control "
891 "algorithm\n", wiphy_name(local->hw.wiphy));
895 /* add one default STA interface if supported */
896 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
897 result = ieee80211_if_add(local, "wlan%d", NULL,
898 NL80211_IFTYPE_STATION, NULL);
900 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
901 wiphy_name(local->hw.wiphy));
906 ieee80211_led_init(local);
908 /* alloc internal scan request */
910 local->int_scan_req->ssids = &local->scan_ssid;
911 local->int_scan_req->n_ssids = 1;
912 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
913 if (!hw->wiphy->bands[band])
915 for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) {
916 local->int_scan_req->channels[i] =
917 &hw->wiphy->bands[band]->channels[j];
922 local->network_latency_notifier.notifier_call =
923 ieee80211_max_network_latency;
924 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
925 &local->network_latency_notifier);
935 ieee80211_led_exit(local);
936 ieee80211_remove_interfaces(local);
939 ieee80211_wep_free(local);
941 sta_info_stop(local);
943 debugfs_hw_del(local);
944 destroy_workqueue(local->workqueue);
946 wiphy_unregister(local->hw.wiphy);
948 kfree(local->int_scan_req);
951 EXPORT_SYMBOL(ieee80211_register_hw);
953 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
955 struct ieee80211_local *local = hw_to_local(hw);
957 tasklet_kill(&local->tx_pending_tasklet);
958 tasklet_kill(&local->tasklet);
960 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
961 &local->network_latency_notifier);
966 * At this point, interface list manipulations are fine
967 * because the driver cannot be handing us frames any
968 * more and the tasklet is killed.
970 ieee80211_remove_interfaces(local);
974 cancel_work_sync(&local->reconfig_filter);
976 ieee80211_clear_tx_pending(local);
977 sta_info_stop(local);
978 rate_control_deinitialize(local);
979 debugfs_hw_del(local);
981 if (skb_queue_len(&local->skb_queue)
982 || skb_queue_len(&local->skb_queue_unreliable))
983 printk(KERN_WARNING "%s: skb_queue not empty\n",
984 wiphy_name(local->hw.wiphy));
985 skb_queue_purge(&local->skb_queue);
986 skb_queue_purge(&local->skb_queue_unreliable);
988 destroy_workqueue(local->workqueue);
989 wiphy_unregister(local->hw.wiphy);
990 ieee80211_wep_free(local);
991 ieee80211_led_exit(local);
992 kfree(local->int_scan_req);
994 EXPORT_SYMBOL(ieee80211_unregister_hw);
996 void ieee80211_free_hw(struct ieee80211_hw *hw)
998 struct ieee80211_local *local = hw_to_local(hw);
1000 mutex_destroy(&local->iflist_mtx);
1001 mutex_destroy(&local->scan_mtx);
1003 wiphy_free(local->hw.wiphy);
1005 EXPORT_SYMBOL(ieee80211_free_hw);
1007 static int __init ieee80211_init(void)
1009 struct sk_buff *skb;
1012 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1013 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1014 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1016 ret = rc80211_minstrel_init();
1020 ret = rc80211_pid_init();
1024 ieee80211_debugfs_netdev_init();
1029 static void __exit ieee80211_exit(void)
1032 rc80211_minstrel_exit();
1035 * For key todo, it'll be empty by now but the work
1036 * might still be scheduled.
1038 flush_scheduled_work();
1043 ieee80211_debugfs_netdev_exit();
1047 subsys_initcall(ieee80211_init);
1048 module_exit(ieee80211_exit);
1050 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1051 MODULE_LICENSE("GPL");