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 <net/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_i.h"
36 #include "debugfs_netdev.h"
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
48 } __attribute__ ((packed));
51 /* must be called under mdev tx lock */
52 void ieee80211_configure_filter(struct ieee80211_local *local)
54 unsigned int changed_flags;
55 unsigned int new_flags = 0;
57 if (atomic_read(&local->iff_promiscs))
58 new_flags |= FIF_PROMISC_IN_BSS;
60 if (atomic_read(&local->iff_allmultis))
61 new_flags |= FIF_ALLMULTI;
64 new_flags |= FIF_BCN_PRBRESP_PROMISC;
66 if (local->fif_fcsfail)
67 new_flags |= FIF_FCSFAIL;
69 if (local->fif_plcpfail)
70 new_flags |= FIF_PLCPFAIL;
72 if (local->fif_control)
73 new_flags |= FIF_CONTROL;
75 if (local->fif_other_bss)
76 new_flags |= FIF_OTHER_BSS;
78 changed_flags = local->filter_flags ^ new_flags;
83 local->ops->configure_filter(local_to_hw(local),
84 changed_flags, &new_flags,
85 local->mdev->mc_count,
86 local->mdev->mc_list);
88 WARN_ON(new_flags & (1<<31));
90 local->filter_flags = new_flags & ~(1<<31);
93 /* master interface */
95 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
97 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
101 static const struct header_ops ieee80211_header_ops = {
102 .create = eth_header,
103 .parse = header_parse_80211,
104 .rebuild = eth_rebuild_header,
105 .cache = eth_header_cache,
106 .cache_update = eth_header_cache_update,
109 static int ieee80211_master_open(struct net_device *dev)
111 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
112 struct ieee80211_local *local = mpriv->local;
113 struct ieee80211_sub_if_data *sdata;
114 int res = -EOPNOTSUPP;
116 /* we hold the RTNL here so can safely walk the list */
117 list_for_each_entry(sdata, &local->interfaces, list) {
118 if (netif_running(sdata->dev)) {
127 netif_tx_start_all_queues(local->mdev);
132 static int ieee80211_master_stop(struct net_device *dev)
134 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
135 struct ieee80211_local *local = mpriv->local;
136 struct ieee80211_sub_if_data *sdata;
138 /* we hold the RTNL here so can safely walk the list */
139 list_for_each_entry(sdata, &local->interfaces, list)
140 if (netif_running(sdata->dev))
141 dev_close(sdata->dev);
146 static void ieee80211_master_set_multicast_list(struct net_device *dev)
148 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
149 struct ieee80211_local *local = mpriv->local;
151 ieee80211_configure_filter(local);
154 /* everything else */
156 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
158 struct ieee80211_local *local = sdata->local;
159 struct ieee80211_if_conf conf;
161 if (WARN_ON(!netif_running(sdata->dev)))
164 if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
167 if (!local->ops->config_interface)
170 memset(&conf, 0, sizeof(conf));
172 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
173 sdata->vif.type == NL80211_IFTYPE_ADHOC)
174 conf.bssid = sdata->u.sta.bssid;
175 else if (sdata->vif.type == NL80211_IFTYPE_AP)
176 conf.bssid = sdata->dev->dev_addr;
177 else if (ieee80211_vif_is_mesh(&sdata->vif)) {
178 static const u8 zero[ETH_ALEN] = { 0 };
185 switch (sdata->vif.type) {
186 case NL80211_IFTYPE_AP:
187 case NL80211_IFTYPE_ADHOC:
188 case NL80211_IFTYPE_MESH_POINT:
191 /* do not warn to simplify caller in scan.c */
192 changed &= ~IEEE80211_IFCC_BEACON_ENABLED;
193 if (WARN_ON(changed & IEEE80211_IFCC_BEACON))
195 changed &= ~IEEE80211_IFCC_BEACON;
199 if (changed & IEEE80211_IFCC_BEACON_ENABLED) {
200 if (local->sw_scanning) {
201 conf.enable_beacon = false;
204 * Beacon should be enabled, but AP mode must
205 * check whether there is a beacon configured.
207 switch (sdata->vif.type) {
208 case NL80211_IFTYPE_AP:
210 !!rcu_dereference(sdata->u.ap.beacon);
212 case NL80211_IFTYPE_ADHOC:
213 conf.enable_beacon = !!sdata->u.sta.probe_resp;
215 case NL80211_IFTYPE_MESH_POINT:
216 conf.enable_beacon = true;
226 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
229 conf.changed = changed;
231 return local->ops->config_interface(local_to_hw(local),
235 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
237 struct ieee80211_channel *chan;
240 enum nl80211_channel_type channel_type;
244 if (local->sw_scanning) {
245 chan = local->scan_channel;
246 channel_type = NL80211_CHAN_NO_HT;
248 chan = local->oper_channel;
249 channel_type = local->oper_channel_type;
252 if (chan != local->hw.conf.channel ||
253 channel_type != local->hw.conf.channel_type) {
254 local->hw.conf.channel = chan;
255 local->hw.conf.channel_type = channel_type;
256 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
259 if (local->sw_scanning)
260 power = chan->max_power;
262 power = local->power_constr_level ?
263 (chan->max_power - local->power_constr_level) :
266 if (local->user_power_level)
267 power = min(power, local->user_power_level);
269 if (local->hw.conf.power_level != power) {
270 changed |= IEEE80211_CONF_CHANGE_POWER;
271 local->hw.conf.power_level = power;
274 if (changed && local->open_count) {
275 ret = local->ops->config(local_to_hw(local), changed);
278 * HW reconfiguration should never fail, the driver has told
279 * us what it can support so it should live up to that promise.
282 * rfkill is not integrated with mac80211 and a
283 * configuration command can thus fail if hardware rfkill
286 * FIXME: integrate rfkill with mac80211 and then add this
296 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
299 struct ieee80211_local *local = sdata->local;
301 if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
307 if (local->ops->bss_info_changed)
308 local->ops->bss_info_changed(local_to_hw(local),
310 &sdata->vif.bss_conf,
314 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
316 sdata->vif.bss_conf.use_cts_prot = false;
317 sdata->vif.bss_conf.use_short_preamble = false;
318 sdata->vif.bss_conf.use_short_slot = false;
319 return BSS_CHANGED_ERP_CTS_PROT |
320 BSS_CHANGED_ERP_PREAMBLE |
321 BSS_CHANGED_ERP_SLOT;
324 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
327 struct ieee80211_local *local = hw_to_local(hw);
328 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
331 skb->dev = local->mdev;
332 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
333 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
334 &local->skb_queue : &local->skb_queue_unreliable, skb);
335 tmp = skb_queue_len(&local->skb_queue) +
336 skb_queue_len(&local->skb_queue_unreliable);
337 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
338 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
339 dev_kfree_skb_irq(skb);
341 I802_DEBUG_INC(local->tx_status_drop);
343 tasklet_schedule(&local->tasklet);
345 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
347 static void ieee80211_tasklet_handler(unsigned long data)
349 struct ieee80211_local *local = (struct ieee80211_local *) data;
351 struct ieee80211_rx_status rx_status;
352 struct ieee80211_ra_tid *ra_tid;
354 while ((skb = skb_dequeue(&local->skb_queue)) ||
355 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
356 switch (skb->pkt_type) {
357 case IEEE80211_RX_MSG:
358 /* status is in skb->cb */
359 memcpy(&rx_status, skb->cb, sizeof(rx_status));
360 /* Clear skb->pkt_type in order to not confuse kernel
363 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
365 case IEEE80211_TX_STATUS_MSG:
367 ieee80211_tx_status(local_to_hw(local), skb);
369 case IEEE80211_DELBA_MSG:
370 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
371 ieee80211_stop_tx_ba_cb(local_to_hw(local),
372 ra_tid->ra, ra_tid->tid);
375 case IEEE80211_ADDBA_MSG:
376 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
377 ieee80211_start_tx_ba_cb(local_to_hw(local),
378 ra_tid->ra, ra_tid->tid);
382 WARN(1, "mac80211: Packet is of unknown type %d\n",
390 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
391 * make a prepared TX frame (one that has been given to hw) to look like brand
392 * new IEEE 802.11 frame that is ready to go through TX processing again.
394 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
395 struct ieee80211_key *key,
398 unsigned int hdrlen, iv_len, mic_len;
399 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
401 hdrlen = ieee80211_hdrlen(hdr->frame_control);
406 switch (key->conf.alg) {
409 mic_len = WEP_ICV_LEN;
412 iv_len = TKIP_IV_LEN;
413 mic_len = TKIP_ICV_LEN;
416 iv_len = CCMP_HDR_LEN;
417 mic_len = CCMP_MIC_LEN;
423 if (skb->len >= hdrlen + mic_len &&
424 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
425 skb_trim(skb, skb->len - mic_len);
426 if (skb->len >= hdrlen + iv_len) {
427 memmove(skb->data + iv_len, skb->data, hdrlen);
428 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
432 if (ieee80211_is_data_qos(hdr->frame_control)) {
433 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
434 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
435 hdrlen - IEEE80211_QOS_CTL_LEN);
436 skb_pull(skb, IEEE80211_QOS_CTL_LEN);
440 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
441 struct sta_info *sta,
444 sta->tx_filtered_count++;
447 * Clear the TX filter mask for this STA when sending the next
448 * packet. If the STA went to power save mode, this will happen
449 * when it wakes up for the next time.
451 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
454 * This code races in the following way:
456 * (1) STA sends frame indicating it will go to sleep and does so
457 * (2) hardware/firmware adds STA to filter list, passes frame up
458 * (3) hardware/firmware processes TX fifo and suppresses a frame
459 * (4) we get TX status before having processed the frame and
460 * knowing that the STA has gone to sleep.
462 * This is actually quite unlikely even when both those events are
463 * processed from interrupts coming in quickly after one another or
464 * even at the same time because we queue both TX status events and
465 * RX frames to be processed by a tasklet and process them in the
466 * same order that they were received or TX status last. Hence, there
467 * is no race as long as the frame RX is processed before the next TX
468 * status, which drivers can ensure, see below.
470 * Note that this can only happen if the hardware or firmware can
471 * actually add STAs to the filter list, if this is done by the
472 * driver in response to set_tim() (which will only reduce the race
473 * this whole filtering tries to solve, not completely solve it)
474 * this situation cannot happen.
476 * To completely solve this race drivers need to make sure that they
477 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
479 * (b) always process RX events before TX status events if ordering
480 * can be unknown, for example with different interrupt status
483 if (test_sta_flags(sta, WLAN_STA_PS) &&
484 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
485 ieee80211_remove_tx_extra(local, sta->key, skb);
486 skb_queue_tail(&sta->tx_filtered, skb);
490 if (!test_sta_flags(sta, WLAN_STA_PS) && !skb->requeue) {
491 /* Software retry the packet once */
493 ieee80211_remove_tx_extra(local, sta->key, skb);
498 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
500 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
501 "queue_len=%d PS=%d @%lu\n",
502 wiphy_name(local->hw.wiphy),
503 skb_queue_len(&sta->tx_filtered),
504 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
509 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
511 struct sk_buff *skb2;
512 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
513 struct ieee80211_local *local = hw_to_local(hw);
514 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
517 struct ieee80211_supported_band *sband;
518 struct ieee80211_tx_status_rtap_hdr *rthdr;
519 struct ieee80211_sub_if_data *sdata;
520 struct net_device *prev_dev = NULL;
521 struct sta_info *sta;
522 int retry_count = -1, i;
524 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
525 /* the HW cannot have attempted that rate */
526 if (i >= hw->max_rates) {
527 info->status.rates[i].idx = -1;
528 info->status.rates[i].count = 0;
531 retry_count += info->status.rates[i].count;
538 sband = local->hw.wiphy->bands[info->band];
540 sta = sta_info_get(local, hdr->addr1);
543 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
544 test_sta_flags(sta, WLAN_STA_PS)) {
546 * The STA is in power save mode, so assume
547 * that this TX packet failed because of that.
549 ieee80211_handle_filtered_frame(local, sta, skb);
554 fc = hdr->frame_control;
556 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
557 (ieee80211_is_data_qos(fc))) {
561 qc = ieee80211_get_qos_ctl(hdr);
563 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
564 & IEEE80211_SCTL_SEQ);
565 ieee80211_send_bar(sta->sdata, hdr->addr1,
569 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
570 ieee80211_handle_filtered_frame(local, sta, skb);
574 if (!(info->flags & IEEE80211_TX_STAT_ACK))
575 sta->tx_retry_failed++;
576 sta->tx_retry_count += retry_count;
579 rate_control_tx_status(local, sband, sta, skb);
584 ieee80211_led_tx(local, 0);
587 * Fragments are passed to low-level drivers as separate skbs, so these
588 * are actually fragments, not frames. Update frame counters only for
589 * the first fragment of the frame. */
591 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
592 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
594 if (info->flags & IEEE80211_TX_STAT_ACK) {
596 local->dot11TransmittedFrameCount++;
597 if (is_multicast_ether_addr(hdr->addr1))
598 local->dot11MulticastTransmittedFrameCount++;
600 local->dot11RetryCount++;
602 local->dot11MultipleRetryCount++;
605 /* This counter shall be incremented for an acknowledged MPDU
606 * with an individual address in the address 1 field or an MPDU
607 * with a multicast address in the address 1 field of type Data
609 if (!is_multicast_ether_addr(hdr->addr1) ||
610 type == IEEE80211_FTYPE_DATA ||
611 type == IEEE80211_FTYPE_MGMT)
612 local->dot11TransmittedFragmentCount++;
615 local->dot11FailedCount++;
618 /* this was a transmitted frame, but now we want to reuse it */
622 * This is a bit racy but we can avoid a lot of work
625 if (!local->monitors && !local->cooked_mntrs) {
630 /* send frame to monitor interfaces now */
632 if (skb_headroom(skb) < sizeof(*rthdr)) {
633 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
638 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
639 skb_push(skb, sizeof(*rthdr));
641 memset(rthdr, 0, sizeof(*rthdr));
642 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
643 rthdr->hdr.it_present =
644 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
645 (1 << IEEE80211_RADIOTAP_DATA_RETRIES) |
646 (1 << IEEE80211_RADIOTAP_RATE));
648 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
649 !is_multicast_ether_addr(hdr->addr1))
650 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
653 * XXX: Once radiotap gets the bitmap reset thing the vendor
654 * extensions proposal contains, we can actually report
655 * the whole set of tries we did.
657 if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
658 (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
659 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
660 else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
661 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
662 if (info->status.rates[0].idx >= 0 &&
663 !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
664 rthdr->rate = sband->bitrates[
665 info->status.rates[0].idx].bitrate / 5;
667 /* for now report the total retry_count */
668 rthdr->data_retries = retry_count;
670 /* XXX: is this sufficient for BPF? */
671 skb_set_mac_header(skb, 0);
672 skb->ip_summed = CHECKSUM_UNNECESSARY;
673 skb->pkt_type = PACKET_OTHERHOST;
674 skb->protocol = htons(ETH_P_802_2);
675 memset(skb->cb, 0, sizeof(skb->cb));
678 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
679 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
680 if (!netif_running(sdata->dev))
684 skb2 = skb_clone(skb, GFP_ATOMIC);
686 skb2->dev = prev_dev;
691 prev_dev = sdata->dev;
702 EXPORT_SYMBOL(ieee80211_tx_status);
704 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
705 const struct ieee80211_ops *ops)
707 struct ieee80211_local *local;
711 /* Ensure 32-byte alignment of our private data and hw private data.
712 * We use the wiphy priv data for both our ieee80211_local and for
713 * the driver's private data
715 * In memory it'll be like this:
717 * +-------------------------+
719 * +-------------------------+
720 * | struct ieee80211_local |
721 * +-------------------------+
722 * | driver's private data |
723 * +-------------------------+
726 priv_size = ((sizeof(struct ieee80211_local) +
727 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
730 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
735 wiphy->privid = mac80211_wiphy_privid;
737 local = wiphy_priv(wiphy);
738 local->hw.wiphy = wiphy;
740 local->hw.priv = (char *)local +
741 ((sizeof(struct ieee80211_local) +
742 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
747 BUG_ON(!ops->config);
748 BUG_ON(!ops->add_interface);
749 BUG_ON(!ops->remove_interface);
750 BUG_ON(!ops->configure_filter);
753 /* set up some defaults */
754 local->hw.queues = 1;
755 local->hw.max_rates = 1;
756 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
757 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
758 local->hw.conf.long_frame_max_tx_count = 4;
759 local->hw.conf.short_frame_max_tx_count = 7;
760 local->hw.conf.radio_enabled = true;
762 INIT_LIST_HEAD(&local->interfaces);
763 mutex_init(&local->iflist_mtx);
765 spin_lock_init(&local->key_lock);
767 spin_lock_init(&local->queue_stop_reason_lock);
769 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
771 INIT_WORK(&local->dynamic_ps_enable_work,
772 ieee80211_dynamic_ps_enable_work);
773 INIT_WORK(&local->dynamic_ps_disable_work,
774 ieee80211_dynamic_ps_disable_work);
775 setup_timer(&local->dynamic_ps_timer,
776 ieee80211_dynamic_ps_timer, (unsigned long) local);
778 sta_info_init(local);
780 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
781 (unsigned long)local);
782 tasklet_disable(&local->tx_pending_tasklet);
784 tasklet_init(&local->tasklet,
785 ieee80211_tasklet_handler,
786 (unsigned long) local);
787 tasklet_disable(&local->tasklet);
789 skb_queue_head_init(&local->skb_queue);
790 skb_queue_head_init(&local->skb_queue_unreliable);
792 return local_to_hw(local);
794 EXPORT_SYMBOL(ieee80211_alloc_hw);
796 static const struct net_device_ops ieee80211_master_ops = {
797 .ndo_start_xmit = ieee80211_master_start_xmit,
798 .ndo_open = ieee80211_master_open,
799 .ndo_stop = ieee80211_master_stop,
800 .ndo_set_multicast_list = ieee80211_master_set_multicast_list,
801 .ndo_select_queue = ieee80211_select_queue,
804 static void ieee80211_master_setup(struct net_device *mdev)
806 mdev->type = ARPHRD_IEEE80211;
807 mdev->netdev_ops = &ieee80211_master_ops;
808 mdev->header_ops = &ieee80211_header_ops;
809 mdev->tx_queue_len = 1000;
810 mdev->addr_len = ETH_ALEN;
813 int ieee80211_register_hw(struct ieee80211_hw *hw)
815 struct ieee80211_local *local = hw_to_local(hw);
817 enum ieee80211_band band;
818 struct net_device *mdev;
819 struct ieee80211_master_priv *mpriv;
822 * generic code guarantees at least one band,
823 * set this very early because much code assumes
824 * that hw.conf.channel is assigned
826 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
827 struct ieee80211_supported_band *sband;
829 sband = local->hw.wiphy->bands[band];
831 /* init channel we're on */
832 local->hw.conf.channel =
833 local->oper_channel =
834 local->scan_channel = &sband->channels[0];
839 /* if low-level driver supports AP, we also support VLAN */
840 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
841 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
843 /* mac80211 always supports monitor */
844 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
846 result = wiphy_register(local->hw.wiphy);
851 * We use the number of queues for feature tests (QoS, HT) internally
852 * so restrict them appropriately.
854 if (hw->queues > IEEE80211_MAX_QUEUES)
855 hw->queues = IEEE80211_MAX_QUEUES;
856 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
857 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
859 hw->ampdu_queues = 0;
861 mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv),
862 "wmaster%d", ieee80211_master_setup,
863 ieee80211_num_queues(hw));
865 goto fail_mdev_alloc;
867 mpriv = netdev_priv(mdev);
868 mpriv->local = local;
871 ieee80211_rx_bss_list_init(local);
873 local->hw.workqueue =
874 create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
875 if (!local->hw.workqueue) {
881 * The hardware needs headroom for sending the frame,
882 * and we need some headroom for passing the frame to monitor
883 * interfaces, but never both at the same time.
885 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
886 sizeof(struct ieee80211_tx_status_rtap_hdr));
888 debugfs_hw_add(local);
890 if (local->hw.conf.beacon_int < 10)
891 local->hw.conf.beacon_int = 100;
893 if (local->hw.max_listen_interval == 0)
894 local->hw.max_listen_interval = 1;
896 local->hw.conf.listen_interval = local->hw.max_listen_interval;
898 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
899 IEEE80211_HW_SIGNAL_DBM) ?
900 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
901 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
902 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
903 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
904 local->wstats_flags |= IW_QUAL_DBM;
906 result = sta_info_start(local);
911 result = dev_alloc_name(local->mdev, local->mdev->name);
915 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
916 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
918 result = register_netdevice(local->mdev);
922 result = ieee80211_init_rate_ctrl_alg(local,
923 hw->rate_control_algorithm);
925 printk(KERN_DEBUG "%s: Failed to initialize rate control "
926 "algorithm\n", wiphy_name(local->hw.wiphy));
930 result = ieee80211_wep_init(local);
933 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
934 wiphy_name(local->hw.wiphy), result);
938 /* add one default STA interface if supported */
939 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
940 result = ieee80211_if_add(local, "wlan%d", NULL,
941 NL80211_IFTYPE_STATION, NULL);
943 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
944 wiphy_name(local->hw.wiphy));
949 ieee80211_led_init(local);
954 rate_control_deinitialize(local);
956 unregister_netdevice(local->mdev);
960 sta_info_stop(local);
962 debugfs_hw_del(local);
963 destroy_workqueue(local->hw.workqueue);
966 free_netdev(local->mdev);
968 wiphy_unregister(local->hw.wiphy);
971 EXPORT_SYMBOL(ieee80211_register_hw);
973 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
975 struct ieee80211_local *local = hw_to_local(hw);
977 tasklet_kill(&local->tx_pending_tasklet);
978 tasklet_kill(&local->tasklet);
983 * At this point, interface list manipulations are fine
984 * because the driver cannot be handing us frames any
985 * more and the tasklet is killed.
988 /* First, we remove all virtual interfaces. */
989 ieee80211_remove_interfaces(local);
991 /* then, finally, remove the master interface */
992 unregister_netdevice(local->mdev);
996 ieee80211_rx_bss_list_deinit(local);
997 ieee80211_clear_tx_pending(local);
998 sta_info_stop(local);
999 rate_control_deinitialize(local);
1000 debugfs_hw_del(local);
1002 if (skb_queue_len(&local->skb_queue)
1003 || skb_queue_len(&local->skb_queue_unreliable))
1004 printk(KERN_WARNING "%s: skb_queue not empty\n",
1005 wiphy_name(local->hw.wiphy));
1006 skb_queue_purge(&local->skb_queue);
1007 skb_queue_purge(&local->skb_queue_unreliable);
1009 destroy_workqueue(local->hw.workqueue);
1010 wiphy_unregister(local->hw.wiphy);
1011 ieee80211_wep_free(local);
1012 ieee80211_led_exit(local);
1013 free_netdev(local->mdev);
1015 EXPORT_SYMBOL(ieee80211_unregister_hw);
1017 void ieee80211_free_hw(struct ieee80211_hw *hw)
1019 struct ieee80211_local *local = hw_to_local(hw);
1021 mutex_destroy(&local->iflist_mtx);
1023 wiphy_free(local->hw.wiphy);
1025 EXPORT_SYMBOL(ieee80211_free_hw);
1027 static int __init ieee80211_init(void)
1029 struct sk_buff *skb;
1032 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1033 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1034 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1036 ret = rc80211_minstrel_init();
1040 ret = rc80211_pid_init();
1044 ieee80211_debugfs_netdev_init();
1049 static void __exit ieee80211_exit(void)
1052 rc80211_minstrel_exit();
1055 * For key todo, it'll be empty by now but the work
1056 * might still be scheduled.
1058 flush_scheduled_work();
1063 ieee80211_debugfs_netdev_exit();
1067 subsys_initcall(ieee80211_init);
1068 module_exit(ieee80211_exit);
1070 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1071 MODULE_LICENSE("GPL");