blob: 797f53942e5f870093ff771b3d3bb523c664044a [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
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.
9 */
10
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>
Jiri Bencf0706e82007-05-05 11:45:53 -070023#include <linux/bitmap.h>
Johannes Berg10f644a2009-04-16 13:17:25 +020024#include <linux/pm_qos_params.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070025#include <net/net_namespace.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070026#include <net/cfg80211.h>
27
Jiri Bencf0706e82007-05-05 11:45:53 -070028#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020029#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040030#include "rate.h"
Luis Carlos Cobof7a92142008-02-23 15:17:18 +010031#include "mesh.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070032#include "wep.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070033#include "wme.h"
34#include "aes_ccm.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040035#include "led.h"
Michael Wue0eb6852007-09-18 17:29:21 -040036#include "cfg.h"
Jiri Bence9f207f2007-05-05 11:46:38 -070037#include "debugfs.h"
38#include "debugfs_netdev.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070039
Johannes Bergb306f452007-07-10 19:32:08 +020040/*
41 * For seeing transmitted packets on monitor interfaces
42 * we have a radiotap header too.
43 */
44struct ieee80211_tx_status_rtap_hdr {
45 struct ieee80211_radiotap_header hdr;
Johannes Berge6a98542008-10-21 12:40:02 +020046 u8 rate;
47 u8 padding_for_rate;
Johannes Bergb306f452007-07-10 19:32:08 +020048 __le16 tx_flags;
49 u8 data_retries;
50} __attribute__ ((packed));
51
Jiri Bencf0706e82007-05-05 11:45:53 -070052
Johannes Berg0d143fe2008-09-11 00:01:59 +020053void ieee80211_configure_filter(struct ieee80211_local *local)
Johannes Berg4150c572007-09-17 01:29:23 -040054{
Johannes Berg3ac64be2009-08-17 16:16:53 +020055 u64 mc;
Johannes Berg4150c572007-09-17 01:29:23 -040056 unsigned int changed_flags;
57 unsigned int new_flags = 0;
58
Johannes Berg53918992007-09-26 15:19:47 +020059 if (atomic_read(&local->iff_promiscs))
Johannes Berg4150c572007-09-17 01:29:23 -040060 new_flags |= FIF_PROMISC_IN_BSS;
61
Johannes Berg53918992007-09-26 15:19:47 +020062 if (atomic_read(&local->iff_allmultis))
Johannes Berg4150c572007-09-17 01:29:23 -040063 new_flags |= FIF_ALLMULTI;
64
Johannes Berg3ac64be2009-08-17 16:16:53 +020065 if (local->monitors || local->scanning)
Michael Wu8cc9a732008-01-31 19:48:23 +010066 new_flags |= FIF_BCN_PRBRESP_PROMISC;
67
68 if (local->fif_fcsfail)
69 new_flags |= FIF_FCSFAIL;
70
71 if (local->fif_plcpfail)
72 new_flags |= FIF_PLCPFAIL;
73
74 if (local->fif_control)
75 new_flags |= FIF_CONTROL;
76
77 if (local->fif_other_bss)
78 new_flags |= FIF_OTHER_BSS;
Johannes Berg4150c572007-09-17 01:29:23 -040079
Igor Perminove3b90ca2009-08-04 16:48:51 +040080 if (local->fif_pspoll)
81 new_flags |= FIF_PSPOLL;
82
Johannes Berg3ac64be2009-08-17 16:16:53 +020083 spin_lock_bh(&local->filter_lock);
Johannes Berg4150c572007-09-17 01:29:23 -040084 changed_flags = local->filter_flags ^ new_flags;
85
Johannes Berg3ac64be2009-08-17 16:16:53 +020086 mc = drv_prepare_multicast(local, local->mc_count, local->mc_list);
87 spin_unlock_bh(&local->filter_lock);
88
Johannes Berg4150c572007-09-17 01:29:23 -040089 /* be a bit nasty */
90 new_flags |= (1<<31);
91
Johannes Berg3ac64be2009-08-17 16:16:53 +020092 drv_configure_filter(local, changed_flags, &new_flags, mc);
Johannes Berg4150c572007-09-17 01:29:23 -040093
94 WARN_ON(new_flags & (1<<31));
95
96 local->filter_flags = new_flags & ~(1<<31);
97}
98
Johannes Berg3ac64be2009-08-17 16:16:53 +020099static void ieee80211_reconfig_filter(struct work_struct *work)
100{
101 struct ieee80211_local *local =
102 container_of(work, struct ieee80211_local, reconfig_filter);
103
104 ieee80211_configure_filter(local);
105}
106
Johannes Berge8975582008-10-09 12:18:51 +0200107int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200108{
Johannes Berg58905ca2009-05-07 14:23:01 +0200109 struct ieee80211_channel *chan, *scan_chan;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200110 int ret = 0;
Johannes Berge8975582008-10-09 12:18:51 +0200111 int power;
Sujith094d05d2008-12-12 11:57:43 +0530112 enum nl80211_channel_type channel_type;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200113
Johannes Bergcb121ba2008-10-14 16:38:55 +0200114 might_sleep();
115
Johannes Berg58905ca2009-05-07 14:23:01 +0200116 scan_chan = local->scan_channel;
117
118 if (scan_chan) {
119 chan = scan_chan;
Sujith094d05d2008-12-12 11:57:43 +0530120 channel_type = NL80211_CHAN_NO_HT;
Jouni Malinen72bdcf32008-11-26 16:15:24 +0200121 } else {
Johannes Bergb2c258f2007-07-27 15:43:23 +0200122 chan = local->oper_channel;
Sujith094d05d2008-12-12 11:57:43 +0530123 channel_type = local->oper_channel_type;
Johannes Berge8975582008-10-09 12:18:51 +0200124 }
125
Jouni Malinen72bdcf32008-11-26 16:15:24 +0200126 if (chan != local->hw.conf.channel ||
Johannes Berg47979382009-01-07 10:13:27 +0100127 channel_type != local->hw.conf.channel_type) {
Jouni Malinen72bdcf32008-11-26 16:15:24 +0200128 local->hw.conf.channel = chan;
Johannes Berg47979382009-01-07 10:13:27 +0100129 local->hw.conf.channel_type = channel_type;
Jouni Malinen72bdcf32008-11-26 16:15:24 +0200130 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
131 }
Johannes Berg8318d782008-01-24 19:38:38 +0100132
Johannes Berg58905ca2009-05-07 14:23:01 +0200133 if (scan_chan)
Johannes Berge8975582008-10-09 12:18:51 +0200134 power = chan->max_power;
Johannes Berg8318d782008-01-24 19:38:38 +0100135 else
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +0530136 power = local->power_constr_level ?
137 (chan->max_power - local->power_constr_level) :
138 chan->max_power;
139
Johannes Berg47afbaf2009-04-07 15:22:28 +0200140 if (local->user_power_level >= 0)
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +0530141 power = min(power, local->user_power_level);
142
Johannes Berge8975582008-10-09 12:18:51 +0200143 if (local->hw.conf.power_level != power) {
144 changed |= IEEE80211_CONF_CHANGE_POWER;
145 local->hw.conf.power_level = power;
146 }
Johannes Berg8318d782008-01-24 19:38:38 +0100147
Johannes Berge8975582008-10-09 12:18:51 +0200148 if (changed && local->open_count) {
Johannes Berg24487982009-04-23 18:52:52 +0200149 ret = drv_config(local, changed);
Johannes Bergd73782f2008-10-07 12:04:34 +0200150 /*
Reinette Chatre447107f2008-12-04 14:49:08 -0800151 * Goal:
Johannes Bergd73782f2008-10-07 12:04:34 +0200152 * HW reconfiguration should never fail, the driver has told
153 * us what it can support so it should live up to that promise.
Reinette Chatre447107f2008-12-04 14:49:08 -0800154 *
155 * Current status:
156 * rfkill is not integrated with mac80211 and a
157 * configuration command can thus fail if hardware rfkill
158 * is enabled
159 *
160 * FIXME: integrate rfkill with mac80211 and then add this
161 * WARN_ON() back
162 *
Johannes Bergd73782f2008-10-07 12:04:34 +0200163 */
Reinette Chatre447107f2008-12-04 14:49:08 -0800164 /* WARN_ON(ret); */
Johannes Bergd73782f2008-10-07 12:04:34 +0200165 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200166
167 return ret;
168}
169
Johannes Berg471b3ef2007-12-28 14:32:58 +0100170void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
171 u32 changed)
Daniel Draked9430a32007-07-27 15:43:24 +0200172{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100173 struct ieee80211_local *local = sdata->local;
Johannes Berg9cef8732009-05-14 13:10:14 +0200174 static const u8 zero[ETH_ALEN] = { 0 };
Johannes Berg471b3ef2007-12-28 14:32:58 +0100175
176 if (!changed)
177 return;
178
Johannes Berg9cef8732009-05-14 13:10:14 +0200179 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
180 /*
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.
184 */
185 if (sdata->vif.bss_conf.assoc)
186 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
187 else
188 sdata->vif.bss_conf.bssid = zero;
189 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
Johannes Berg2d0ddec2009-04-23 16:13:26 +0200190 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)) {
Johannes Berg2d0ddec2009-04-23 16:13:26 +0200194 sdata->vif.bss_conf.bssid = zero;
195 } else {
196 WARN_ON(1);
197 return;
198 }
199
200 switch (sdata->vif.type) {
201 case NL80211_IFTYPE_AP:
202 case NL80211_IFTYPE_ADHOC:
203 case NL80211_IFTYPE_MESH_POINT:
204 break;
205 default:
206 /* do not warn to simplify caller in scan.c */
207 changed &= ~BSS_CHANGED_BEACON_ENABLED;
208 if (WARN_ON(changed & BSS_CHANGED_BEACON))
209 return;
210 break;
211 }
212
213 if (changed & BSS_CHANGED_BEACON_ENABLED) {
Bob Copeland97af7432009-07-29 10:13:03 +0200214 if (local->quiescing || !netif_running(sdata->dev) ||
215 test_bit(SCAN_SW_SCANNING, &local->scanning)) {
Johannes Berg2d0ddec2009-04-23 16:13:26 +0200216 sdata->vif.bss_conf.enable_beacon = false;
217 } else {
218 /*
219 * Beacon should be enabled, but AP mode must
220 * check whether there is a beacon configured.
221 */
222 switch (sdata->vif.type) {
223 case NL80211_IFTYPE_AP:
224 sdata->vif.bss_conf.enable_beacon =
225 !!rcu_dereference(sdata->u.ap.beacon);
226 break;
227 case NL80211_IFTYPE_ADHOC:
228 sdata->vif.bss_conf.enable_beacon =
229 !!rcu_dereference(sdata->u.ibss.presp);
230 break;
231 case NL80211_IFTYPE_MESH_POINT:
232 sdata->vif.bss_conf.enable_beacon = true;
233 break;
234 default:
235 /* not reached */
236 WARN_ON(1);
237 break;
238 }
239 }
240 }
241
Johannes Berg24487982009-04-23 18:52:52 +0200242 drv_bss_info_changed(local, &sdata->vif,
243 &sdata->vif.bss_conf, changed);
Daniel Draked9430a32007-07-27 15:43:24 +0200244}
245
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200246u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
Daniel Draked9430a32007-07-27 15:43:24 +0200247{
Johannes Bergbda39332008-10-11 01:51:51 +0200248 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;
Johannes Berg7a5158e2008-10-08 10:59:33 +0200251 return BSS_CHANGED_ERP_CTS_PROT |
252 BSS_CHANGED_ERP_PREAMBLE |
253 BSS_CHANGED_ERP_SLOT;
Daniel Draked9430a32007-07-27 15:43:24 +0200254}
255
Jiri Bencf0706e82007-05-05 11:45:53 -0700256void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
Johannes Berge039fa42008-05-15 12:55:29 +0200257 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -0700258{
259 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berge039fa42008-05-15 12:55:29 +0200260 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700261 int tmp;
262
Jiri Bencf0706e82007-05-05 11:45:53 -0700263 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
Johannes Berge039fa42008-05-15 12:55:29 +0200264 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
Jiri Bencf0706e82007-05-05 11:45:53 -0700265 &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))) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700270 dev_kfree_skb_irq(skb);
271 tmp--;
272 I802_DEBUG_INC(local->tx_status_drop);
273 }
274 tasklet_schedule(&local->tasklet);
275}
276EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
277
278static void ieee80211_tasklet_handler(unsigned long data)
279{
280 struct ieee80211_local *local = (struct ieee80211_local *) data;
281 struct sk_buff *skb;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200282 struct ieee80211_ra_tid *ra_tid;
Jiri Bencf0706e82007-05-05 11:45:53 -0700283
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:
Johannes Berg51fb61e2007-12-19 01:31:27 +0100288 /* Clear skb->pkt_type in order to not confuse kernel
Jiri Bencf0706e82007-05-05 11:45:53 -0700289 * netstack. */
290 skb->pkt_type = 0;
Johannes Bergf1d58c22009-06-17 13:13:00 +0200291 ieee80211_rx(local_to_hw(local), skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700292 break;
293 case IEEE80211_TX_STATUS_MSG:
Jiri Bencf0706e82007-05-05 11:45:53 -0700294 skb->pkt_type = 0;
Johannes Berge039fa42008-05-15 12:55:29 +0200295 ieee80211_tx_status(local_to_hw(local), skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700296 break;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200297 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);
301 dev_kfree_skb(skb);
302 break;
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);
307 dev_kfree_skb(skb);
308 break ;
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200309 default:
Larry Finger5e3f3082008-12-17 14:26:59 -0600310 WARN(1, "mac80211: Packet is of unknown type %d\n",
311 skb->pkt_type);
Jiri Bencf0706e82007-05-05 11:45:53 -0700312 dev_kfree_skb(skb);
313 break;
314 }
315 }
316}
317
Johannes Bergd46e1442008-02-20 23:59:33 +0100318static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
319 struct sta_info *sta,
Johannes Berge039fa42008-05-15 12:55:29 +0200320 struct sk_buff *skb)
Johannes Bergd46e1442008-02-20 23:59:33 +0100321{
Johannes Berg8f77f382009-06-07 21:58:37 +0200322 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
323
Johannes Berg4da163a2009-07-27 20:28:40 +0200324 /*
325 * XXX: This is temporary!
326 *
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
334 * internally.
335 *
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.
344 *
345 * Hence, for now, fix the bug by just dropping the frame.
346 */
347 goto drop;
348
Johannes Bergd46e1442008-02-20 23:59:33 +0100349 sta->tx_filtered_count++;
350
351 /*
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
Yi Zhuf6d97102008-05-27 17:50:50 +0300354 * when it wakes up for the next time.
Johannes Bergd46e1442008-02-20 23:59:33 +0100355 */
Johannes Berg07346f812008-05-03 01:02:02 +0200356 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
Johannes Bergd46e1442008-02-20 23:59:33 +0100357
358 /*
359 * This code races in the following way:
360 *
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.
366 *
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.
374 *
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.
380 *
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
383 * functions and
384 * (b) always process RX events before TX status events if ordering
385 * can be unknown, for example with different interrupt status
386 * bits.
387 */
Johannes Berg07346f812008-05-03 01:02:02 +0200388 if (test_sta_flags(sta, WLAN_STA_PS) &&
Johannes Bergd46e1442008-02-20 23:59:33 +0100389 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
Johannes Bergd46e1442008-02-20 23:59:33 +0100390 skb_queue_tail(&sta->tx_filtered, skb);
391 return;
392 }
393
Johannes Berg8f77f382009-06-07 21:58:37 +0200394 if (!test_sta_flags(sta, WLAN_STA_PS) &&
395 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
Johannes Bergd46e1442008-02-20 23:59:33 +0100396 /* Software retry the packet once */
Johannes Berg8f77f382009-06-07 21:58:37 +0200397 info->flags |= IEEE80211_TX_INTFL_RETRIED;
398 ieee80211_add_pending_skb(local, skb);
Johannes Bergd46e1442008-02-20 23:59:33 +0100399 return;
400 }
401
Johannes Berg4da163a2009-07-27 20:28:40 +0200402 drop:
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200403#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergd46e1442008-02-20 23:59:33 +0100404 if (net_ratelimit())
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),
Johannes Berg07346f812008-05-03 01:02:02 +0200409 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200410#endif
Johannes Bergd46e1442008-02-20 23:59:33 +0100411 dev_kfree_skb(skb);
412}
413
Johannes Berge039fa42008-05-15 12:55:29 +0200414void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -0700415{
416 struct sk_buff *skb2;
417 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
418 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berge039fa42008-05-15 12:55:29 +0200419 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700420 u16 frag, type;
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300421 __le16 fc;
Johannes Berg4b7679a2008-09-18 18:14:18 +0200422 struct ieee80211_supported_band *sband;
Johannes Bergb306f452007-07-10 19:32:08 +0200423 struct ieee80211_tx_status_rtap_hdr *rthdr;
424 struct ieee80211_sub_if_data *sdata;
Michael Wu3d30d942008-01-31 19:48:27 +0100425 struct net_device *prev_dev = NULL;
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300426 struct sta_info *sta;
Johannes Berge6a98542008-10-21 12:40:02 +0200427 int retry_count = -1, i;
428
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;
434 }
435
436 retry_count += info->status.rates[i].count;
437 }
438 if (retry_count < 0)
439 retry_count = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -0700440
Johannes Bergd0709a62008-02-25 16:27:46 +0100441 rcu_read_lock();
442
Johannes Berge6a98542008-10-21 12:40:02 +0200443 sband = local->hw.wiphy->bands[info->band];
444
Johannes Berg95dac0402008-09-11 02:03:28 +0200445 sta = sta_info_get(local, hdr->addr1);
446
447 if (sta) {
Johannes Berge6a98542008-10-21 12:40:02 +0200448 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
Johannes Berg95dac0402008-09-11 02:03:28 +0200449 test_sta_flags(sta, WLAN_STA_PS)) {
450 /*
451 * The STA is in power save mode, so assume
452 * that this TX packet failed because of that.
453 */
454 ieee80211_handle_filtered_frame(local, sta, skb);
455 rcu_read_unlock();
456 return;
Jiri Bencf0706e82007-05-05 11:45:53 -0700457 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700458
Johannes Berg95dac0402008-09-11 02:03:28 +0200459 fc = hdr->frame_control;
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300460
Johannes Berg95dac0402008-09-11 02:03:28 +0200461 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
462 (ieee80211_is_data_qos(fc))) {
463 u16 tid, ssn;
464 u8 *qc;
465
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300466 qc = ieee80211_get_qos_ctl(hdr);
467 tid = qc[0] & 0xf;
468 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
469 & IEEE80211_SCTL_SEQ);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200470 ieee80211_send_bar(sta->sdata, hdr->addr1,
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300471 tid, ssn);
472 }
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300473
Johannes Berg95dac0402008-09-11 02:03:28 +0200474 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
Johannes Berge039fa42008-05-15 12:55:29 +0200475 ieee80211_handle_filtered_frame(local, sta, skb);
Johannes Bergd0709a62008-02-25 16:27:46 +0100476 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -0700477 return;
Johannes Berg95dac0402008-09-11 02:03:28 +0200478 } else {
Johannes Berge6a98542008-10-21 12:40:02 +0200479 if (!(info->flags & IEEE80211_TX_STAT_ACK))
Johannes Berg95dac0402008-09-11 02:03:28 +0200480 sta->tx_retry_failed++;
Johannes Berge6a98542008-10-21 12:40:02 +0200481 sta->tx_retry_count += retry_count;
Jiri Bencf0706e82007-05-05 11:45:53 -0700482 }
Johannes Berg95dac0402008-09-11 02:03:28 +0200483
Johannes Berg4b7679a2008-09-18 18:14:18 +0200484 rate_control_tx_status(local, sband, sta, skb);
Javier Cardonabfc32e62009-08-17 17:15:55 -0700485 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
486 ieee80211s_update_metric(local, sta, skb);
Johannes Berg95dac0402008-09-11 02:03:28 +0200487 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700488
Johannes Bergd0709a62008-02-25 16:27:46 +0100489 rcu_read_unlock();
490
Jiri Bencf0706e82007-05-05 11:45:53 -0700491 ieee80211_led_tx(local, 0);
492
493 /* SNMP counters
494 * Fragments are passed to low-level drivers as separate skbs, so these
495 * are actually fragments, not frames. Update frame counters only for
496 * the first fragment of the frame. */
497
498 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
499 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
500
Johannes Berge039fa42008-05-15 12:55:29 +0200501 if (info->flags & IEEE80211_TX_STAT_ACK) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700502 if (frag == 0) {
503 local->dot11TransmittedFrameCount++;
504 if (is_multicast_ether_addr(hdr->addr1))
505 local->dot11MulticastTransmittedFrameCount++;
Johannes Berge6a98542008-10-21 12:40:02 +0200506 if (retry_count > 0)
Jiri Bencf0706e82007-05-05 11:45:53 -0700507 local->dot11RetryCount++;
Johannes Berge6a98542008-10-21 12:40:02 +0200508 if (retry_count > 1)
Jiri Bencf0706e82007-05-05 11:45:53 -0700509 local->dot11MultipleRetryCount++;
510 }
511
512 /* This counter shall be incremented for an acknowledged MPDU
513 * with an individual address in the address 1 field or an MPDU
514 * with a multicast address in the address 1 field of type Data
515 * or Management. */
516 if (!is_multicast_ether_addr(hdr->addr1) ||
517 type == IEEE80211_FTYPE_DATA ||
518 type == IEEE80211_FTYPE_MGMT)
519 local->dot11TransmittedFragmentCount++;
520 } else {
521 if (frag == 0)
522 local->dot11FailedCount++;
523 }
524
Johannes Bergb306f452007-07-10 19:32:08 +0200525 /* this was a transmitted frame, but now we want to reuse it */
526 skb_orphan(skb);
527
Michael Wu3d30d942008-01-31 19:48:27 +0100528 /*
529 * This is a bit racy but we can avoid a lot of work
530 * with this test...
531 */
532 if (!local->monitors && !local->cooked_mntrs) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700533 dev_kfree_skb(skb);
534 return;
535 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700536
Johannes Bergb306f452007-07-10 19:32:08 +0200537 /* send frame to monitor interfaces now */
538
539 if (skb_headroom(skb) < sizeof(*rthdr)) {
540 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
541 dev_kfree_skb(skb);
542 return;
543 }
544
Johannes Berg988c0f72008-04-17 19:21:22 +0200545 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
Johannes Bergb306f452007-07-10 19:32:08 +0200546 skb_push(skb, sizeof(*rthdr));
547
548 memset(rthdr, 0, sizeof(*rthdr));
549 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
550 rthdr->hdr.it_present =
551 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
Johannes Berge6a98542008-10-21 12:40:02 +0200552 (1 << IEEE80211_RADIOTAP_DATA_RETRIES) |
553 (1 << IEEE80211_RADIOTAP_RATE));
Johannes Bergb306f452007-07-10 19:32:08 +0200554
Johannes Berge039fa42008-05-15 12:55:29 +0200555 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
Johannes Bergb306f452007-07-10 19:32:08 +0200556 !is_multicast_ether_addr(hdr->addr1))
557 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
558
Johannes Berge6a98542008-10-21 12:40:02 +0200559 /*
560 * XXX: Once radiotap gets the bitmap reset thing the vendor
561 * extensions proposal contains, we can actually report
562 * the whole set of tries we did.
563 */
564 if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
565 (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
Johannes Bergb306f452007-07-10 19:32:08 +0200566 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
Johannes Berge6a98542008-10-21 12:40:02 +0200567 else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
Johannes Bergb306f452007-07-10 19:32:08 +0200568 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
Johannes Berge6a98542008-10-21 12:40:02 +0200569 if (info->status.rates[0].idx >= 0 &&
570 !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
571 rthdr->rate = sband->bitrates[
572 info->status.rates[0].idx].bitrate / 5;
Johannes Bergb306f452007-07-10 19:32:08 +0200573
Johannes Berge6a98542008-10-21 12:40:02 +0200574 /* for now report the total retry_count */
575 rthdr->data_retries = retry_count;
Johannes Bergb306f452007-07-10 19:32:08 +0200576
Michael Wu3d30d942008-01-31 19:48:27 +0100577 /* XXX: is this sufficient for BPF? */
578 skb_set_mac_header(skb, 0);
579 skb->ip_summed = CHECKSUM_UNNECESSARY;
580 skb->pkt_type = PACKET_OTHERHOST;
581 skb->protocol = htons(ETH_P_802_2);
582 memset(skb->cb, 0, sizeof(skb->cb));
Johannes Bergb306f452007-07-10 19:32:08 +0200583
Michael Wu3d30d942008-01-31 19:48:27 +0100584 rcu_read_lock();
585 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200586 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
Johannes Bergb306f452007-07-10 19:32:08 +0200587 if (!netif_running(sdata->dev))
588 continue;
Michael Wu3d30d942008-01-31 19:48:27 +0100589
590 if (prev_dev) {
Johannes Berg79010422007-09-18 17:29:21 -0400591 skb2 = skb_clone(skb, GFP_ATOMIC);
Michael Wu3d30d942008-01-31 19:48:27 +0100592 if (skb2) {
593 skb2->dev = prev_dev;
594 netif_rx(skb2);
595 }
596 }
597
598 prev_dev = sdata->dev;
Johannes Bergb306f452007-07-10 19:32:08 +0200599 }
600 }
Michael Wu3d30d942008-01-31 19:48:27 +0100601 if (prev_dev) {
602 skb->dev = prev_dev;
603 netif_rx(skb);
604 skb = NULL;
605 }
Johannes Berg79010422007-09-18 17:29:21 -0400606 rcu_read_unlock();
Michael Wu3d30d942008-01-31 19:48:27 +0100607 dev_kfree_skb(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700608}
609EXPORT_SYMBOL(ieee80211_tx_status);
610
Johannes Bergf2753dd2009-04-14 10:09:24 +0200611static void ieee80211_restart_work(struct work_struct *work)
612{
613 struct ieee80211_local *local =
614 container_of(work, struct ieee80211_local, restart_work);
615
616 rtnl_lock();
617 ieee80211_reconfig(local);
618 rtnl_unlock();
619}
620
621void ieee80211_restart_hw(struct ieee80211_hw *hw)
622{
623 struct ieee80211_local *local = hw_to_local(hw);
624
625 /* use this reason, __ieee80211_resume will unblock it */
626 ieee80211_stop_queues_by_reason(hw,
627 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
628
629 schedule_work(&local->restart_work);
630}
631EXPORT_SYMBOL(ieee80211_restart_hw);
632
Jiri Bencf0706e82007-05-05 11:45:53 -0700633struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
634 const struct ieee80211_ops *ops)
635{
Jiri Bencf0706e82007-05-05 11:45:53 -0700636 struct ieee80211_local *local;
Johannes Berg96f5e662009-02-12 00:51:53 +0100637 int priv_size, i;
Jiri Bencf0706e82007-05-05 11:45:53 -0700638 struct wiphy *wiphy;
639
640 /* Ensure 32-byte alignment of our private data and hw private data.
641 * We use the wiphy priv data for both our ieee80211_local and for
642 * the driver's private data
643 *
644 * In memory it'll be like this:
645 *
646 * +-------------------------+
647 * | struct wiphy |
648 * +-------------------------+
649 * | struct ieee80211_local |
650 * +-------------------------+
651 * | driver's private data |
652 * +-------------------------+
653 *
654 */
Eric Dumazet1ce8e7b2009-05-27 04:42:37 +0000655 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
Jiri Bencf0706e82007-05-05 11:45:53 -0700656
657 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
658
659 if (!wiphy)
660 return NULL;
661
Johannes Berga272a722009-07-14 00:33:36 +0200662 wiphy->netnsok = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700663 wiphy->privid = mac80211_wiphy_privid;
Johannes Berg18a83652009-03-31 12:12:05 +0200664
Johannes Berg00d3f142009-02-10 21:26:00 +0100665 /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
666 wiphy->bss_priv_size = sizeof(struct ieee80211_bss) -
667 sizeof(struct cfg80211_bss);
Jiri Bencf0706e82007-05-05 11:45:53 -0700668
669 local = wiphy_priv(wiphy);
Johannes Bergde95a542009-04-01 11:58:36 +0200670
Jiri Bencf0706e82007-05-05 11:45:53 -0700671 local->hw.wiphy = wiphy;
672
Eric Dumazet1ce8e7b2009-05-27 04:42:37 +0000673 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
Jiri Bencf0706e82007-05-05 11:45:53 -0700674
Johannes Berg4480f15c2007-07-10 19:32:10 +0200675 BUG_ON(!ops->tx);
Johannes Berg4150c572007-09-17 01:29:23 -0400676 BUG_ON(!ops->start);
677 BUG_ON(!ops->stop);
Johannes Berg4480f15c2007-07-10 19:32:10 +0200678 BUG_ON(!ops->config);
679 BUG_ON(!ops->add_interface);
Johannes Berg4150c572007-09-17 01:29:23 -0400680 BUG_ON(!ops->remove_interface);
681 BUG_ON(!ops->configure_filter);
Jiri Bencf0706e82007-05-05 11:45:53 -0700682 local->ops = ops;
683
Johannes Berge6a98542008-10-21 12:40:02 +0200684 /* set up some defaults */
685 local->hw.queues = 1;
686 local->hw.max_rates = 1;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200687 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
688 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
Johannes Bergc428c892009-04-29 00:28:18 +0200689 local->user_power_level = -1;
Jiri Bencf0706e82007-05-05 11:45:53 -0700690
Johannes Berg79010422007-09-18 17:29:21 -0400691 INIT_LIST_HEAD(&local->interfaces);
Johannes Bergc771c9d2009-01-23 22:54:03 +0100692 mutex_init(&local->iflist_mtx);
Johannes Bergf3b85252009-04-23 16:01:47 +0200693 mutex_init(&local->scan_mtx);
Jiri Bencf0706e82007-05-05 11:45:53 -0700694
Johannes Bergb16bd152008-04-11 21:40:35 +0200695 spin_lock_init(&local->key_lock);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200696 spin_lock_init(&local->filter_lock);
Kalle Valoce7c9112008-12-18 23:35:20 +0200697 spin_lock_init(&local->queue_stop_reason_lock);
698
Johannes Bergc2b13452008-09-11 00:01:55 +0200699 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
Jiri Bencf0706e82007-05-05 11:45:53 -0700700
Johannes Bergf2753dd2009-04-14 10:09:24 +0200701 INIT_WORK(&local->restart_work, ieee80211_restart_work);
702
Johannes Berg3ac64be2009-08-17 16:16:53 +0200703 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
704
Kalle Valo520eb822008-12-18 23:35:27 +0200705 INIT_WORK(&local->dynamic_ps_enable_work,
706 ieee80211_dynamic_ps_enable_work);
707 INIT_WORK(&local->dynamic_ps_disable_work,
708 ieee80211_dynamic_ps_disable_work);
709 setup_timer(&local->dynamic_ps_timer,
710 ieee80211_dynamic_ps_timer, (unsigned long) local);
711
Jiri Bencf0706e82007-05-05 11:45:53 -0700712 sta_info_init(local);
713
Johannes Berg2a577d92009-03-23 17:28:37 +0100714 for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
715 skb_queue_head_init(&local->pending[i]);
Jiri Bencf0706e82007-05-05 11:45:53 -0700716 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
717 (unsigned long)local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700718
719 tasklet_init(&local->tasklet,
720 ieee80211_tasklet_handler,
721 (unsigned long) local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700722
723 skb_queue_head_init(&local->skb_queue);
724 skb_queue_head_init(&local->skb_queue_unreliable);
725
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100726 spin_lock_init(&local->ampdu_lock);
727
Jiri Bencf0706e82007-05-05 11:45:53 -0700728 return local_to_hw(local);
729}
730EXPORT_SYMBOL(ieee80211_alloc_hw);
731
732int ieee80211_register_hw(struct ieee80211_hw *hw)
733{
734 struct ieee80211_local *local = hw_to_local(hw);
Jiri Bencf0706e82007-05-05 11:45:53 -0700735 int result;
Johannes Berg8318d782008-01-24 19:38:38 +0100736 enum ieee80211_band band;
Johannes Bergde95a542009-04-01 11:58:36 +0200737 int channels, i, j, max_bitrates;
Johannes Berg5ef2d412009-03-31 12:12:07 +0200738 bool supp_ht;
Johannes Berg25e47c12009-04-02 20:14:06 +0200739 static const u32 cipher_suites[] = {
740 WLAN_CIPHER_SUITE_WEP40,
741 WLAN_CIPHER_SUITE_WEP104,
742 WLAN_CIPHER_SUITE_TKIP,
743 WLAN_CIPHER_SUITE_CCMP,
744
745 /* keep last -- depends on hw flags! */
746 WLAN_CIPHER_SUITE_AES_CMAC
747 };
Johannes Berg8318d782008-01-24 19:38:38 +0100748
749 /*
750 * generic code guarantees at least one band,
751 * set this very early because much code assumes
752 * that hw.conf.channel is assigned
753 */
Johannes Berg2a519312009-02-10 21:25:55 +0100754 channels = 0;
Johannes Bergde95a542009-04-01 11:58:36 +0200755 max_bitrates = 0;
Johannes Berg5ef2d412009-03-31 12:12:07 +0200756 supp_ht = false;
Johannes Berg8318d782008-01-24 19:38:38 +0100757 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
758 struct ieee80211_supported_band *sband;
759
760 sband = local->hw.wiphy->bands[band];
Johannes Bergde95a542009-04-01 11:58:36 +0200761 if (!sband)
762 continue;
763 if (!local->oper_channel) {
Johannes Berg8318d782008-01-24 19:38:38 +0100764 /* init channel we're on */
765 local->hw.conf.channel =
Johannes Berg58905ca2009-05-07 14:23:01 +0200766 local->oper_channel = &sband->channels[0];
767 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
Johannes Berg8318d782008-01-24 19:38:38 +0100768 }
Johannes Bergde95a542009-04-01 11:58:36 +0200769 channels += sband->n_channels;
770
771 if (max_bitrates < sband->n_bitrates)
772 max_bitrates = sband->n_bitrates;
Johannes Berg5ef2d412009-03-31 12:12:07 +0200773 supp_ht = supp_ht || sband->ht_cap.ht_supported;
Johannes Berg8318d782008-01-24 19:38:38 +0100774 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700775
Johannes Berg5ba63532009-08-07 17:54:07 +0200776 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
777 sizeof(void *) * channels, GFP_KERNEL);
778 if (!local->int_scan_req)
Johannes Berg2a519312009-02-10 21:25:55 +0100779 return -ENOMEM;
780
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700781 /* if low-level driver supports AP, we also support VLAN */
782 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
783 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
784
785 /* mac80211 always supports monitor */
786 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
787
Johannes Berg77965c92009-02-18 18:45:06 +0100788 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
789 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
790 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
791 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
792
Johannes Bergde95a542009-04-01 11:58:36 +0200793 /*
794 * Calculate scan IE length -- we need this to alloc
795 * memory and to subtract from the driver limit. It
796 * includes the (extended) supported rates and HT
797 * information -- SSID is the driver's responsibility.
798 */
799 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
Johannes Berg5ef2d412009-03-31 12:12:07 +0200800 if (supp_ht)
801 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
Johannes Bergde95a542009-04-01 11:58:36 +0200802
803 if (!local->ops->hw_scan) {
804 /* For hw_scan, driver needs to set these up. */
805 local->hw.wiphy->max_scan_ssids = 4;
806 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
807 }
808
809 /*
810 * If the driver supports any scan IEs, then assume the
811 * limit includes the IEs mac80211 will add, otherwise
812 * leave it at zero and let the driver sort it out; we
813 * still pass our IEs to the driver but userspace will
814 * not be allowed to in that case.
815 */
816 if (local->hw.wiphy->max_scan_ie_len)
817 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
818
Johannes Berg25e47c12009-04-02 20:14:06 +0200819 local->hw.wiphy->cipher_suites = cipher_suites;
820 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
821 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
822 local->hw.wiphy->n_cipher_suites--;
823
Jiri Bencf0706e82007-05-05 11:45:53 -0700824 result = wiphy_register(local->hw.wiphy);
825 if (result < 0)
Johannes Berg2a519312009-02-10 21:25:55 +0100826 goto fail_wiphy_register;
Jiri Bencf0706e82007-05-05 11:45:53 -0700827
Johannes Berge2530082008-05-17 00:57:14 +0200828 /*
829 * We use the number of queues for feature tests (QoS, HT) internally
830 * so restrict them appropriately.
831 */
Johannes Berge2530082008-05-17 00:57:14 +0200832 if (hw->queues > IEEE80211_MAX_QUEUES)
833 hw->queues = IEEE80211_MAX_QUEUES;
Johannes Berge2530082008-05-17 00:57:14 +0200834
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400835 local->workqueue =
Bob Copeland30d3ef42009-01-23 23:09:35 -0500836 create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400837 if (!local->workqueue) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700838 result = -ENOMEM;
839 goto fail_workqueue;
840 }
841
Johannes Bergb306f452007-07-10 19:32:08 +0200842 /*
843 * The hardware needs headroom for sending the frame,
844 * and we need some headroom for passing the frame to monitor
845 * interfaces, but never both at the same time.
846 */
Jiri Benc33ccad32007-07-18 17:10:44 +0200847 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
848 sizeof(struct ieee80211_tx_status_rtap_hdr));
Johannes Bergb306f452007-07-10 19:32:08 +0200849
Jiri Bence9f207f2007-05-05 11:46:38 -0700850 debugfs_hw_add(local);
851
Tomas Winklerea95bba2008-07-18 13:53:00 +0800852 if (local->hw.max_listen_interval == 0)
853 local->hw.max_listen_interval = 1;
854
855 local->hw.conf.listen_interval = local->hw.max_listen_interval;
856
Jiri Bencf0706e82007-05-05 11:45:53 -0700857 result = sta_info_start(local);
858 if (result < 0)
859 goto fail_sta_info;
860
Alan Jenkinsd4c4a9a2009-04-29 11:41:24 +0100861 result = ieee80211_wep_init(local);
862 if (result < 0) {
863 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
864 wiphy_name(local->hw.wiphy), result);
865 goto fail_wep;
866 }
867
Jiri Bencf0706e82007-05-05 11:45:53 -0700868 rtnl_lock();
Jiri Bencf0706e82007-05-05 11:45:53 -0700869
Johannes Berg830f9032007-10-28 14:51:05 +0100870 result = ieee80211_init_rate_ctrl_alg(local,
871 hw->rate_control_algorithm);
Jiri Bencf0706e82007-05-05 11:45:53 -0700872 if (result < 0) {
873 printk(KERN_DEBUG "%s: Failed to initialize rate control "
Johannes Bergdd1cd4c2007-09-18 17:29:20 -0400874 "algorithm\n", wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -0700875 goto fail_rate;
876 }
877
Johannes Berg8dffff22008-12-09 00:10:30 +0100878 /* add one default STA interface if supported */
879 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
880 result = ieee80211_if_add(local, "wlan%d", NULL,
881 NL80211_IFTYPE_STATION, NULL);
882 if (result)
883 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
884 wiphy_name(local->hw.wiphy));
885 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700886
Jiri Bencf0706e82007-05-05 11:45:53 -0700887 rtnl_unlock();
888
889 ieee80211_led_init(local);
890
Johannes Berg2a519312009-02-10 21:25:55 +0100891 /* alloc internal scan request */
892 i = 0;
Johannes Berg5ba63532009-08-07 17:54:07 +0200893 local->int_scan_req->ssids = &local->scan_ssid;
894 local->int_scan_req->n_ssids = 1;
Johannes Berg2a519312009-02-10 21:25:55 +0100895 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
896 if (!hw->wiphy->bands[band])
897 continue;
898 for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) {
Johannes Berg5ba63532009-08-07 17:54:07 +0200899 local->int_scan_req->channels[i] =
Johannes Berg2a519312009-02-10 21:25:55 +0100900 &hw->wiphy->bands[band]->channels[j];
901 i++;
902 }
903 }
904
Johannes Berg10f644a2009-04-16 13:17:25 +0200905 local->network_latency_notifier.notifier_call =
906 ieee80211_max_network_latency;
907 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
908 &local->network_latency_notifier);
909
910 if (result) {
911 rtnl_lock();
912 goto fail_pm_qos;
913 }
914
Jiri Bencf0706e82007-05-05 11:45:53 -0700915 return 0;
916
Johannes Berg10f644a2009-04-16 13:17:25 +0200917 fail_pm_qos:
918 ieee80211_led_exit(local);
919 ieee80211_remove_interfaces(local);
Johannes Berg10f644a2009-04-16 13:17:25 +0200920 fail_rate:
Jiri Bencf0706e82007-05-05 11:45:53 -0700921 rtnl_unlock();
Alan Jenkinsd4c4a9a2009-04-29 11:41:24 +0100922 ieee80211_wep_free(local);
David S. Milleraba74532009-04-29 20:30:35 -0700923 fail_wep:
Jiri Bencf0706e82007-05-05 11:45:53 -0700924 sta_info_stop(local);
Johannes Berg10f644a2009-04-16 13:17:25 +0200925 fail_sta_info:
Jiri Bence9f207f2007-05-05 11:46:38 -0700926 debugfs_hw_del(local);
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400927 destroy_workqueue(local->workqueue);
Johannes Berg10f644a2009-04-16 13:17:25 +0200928 fail_workqueue:
Jiri Bencf0706e82007-05-05 11:45:53 -0700929 wiphy_unregister(local->hw.wiphy);
Johannes Berg10f644a2009-04-16 13:17:25 +0200930 fail_wiphy_register:
Johannes Berg11ba9642009-08-19 19:45:50 +0200931 kfree(local->int_scan_req);
Jiri Bencf0706e82007-05-05 11:45:53 -0700932 return result;
933}
934EXPORT_SYMBOL(ieee80211_register_hw);
935
Jiri Bencf0706e82007-05-05 11:45:53 -0700936void ieee80211_unregister_hw(struct ieee80211_hw *hw)
937{
938 struct ieee80211_local *local = hw_to_local(hw);
Jiri Bencf0706e82007-05-05 11:45:53 -0700939
940 tasklet_kill(&local->tx_pending_tasklet);
941 tasklet_kill(&local->tasklet);
942
Johannes Berg10f644a2009-04-16 13:17:25 +0200943 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
944 &local->network_latency_notifier);
945
Jiri Bencf0706e82007-05-05 11:45:53 -0700946 rtnl_lock();
947
Johannes Berg79010422007-09-18 17:29:21 -0400948 /*
949 * At this point, interface list manipulations are fine
950 * because the driver cannot be handing us frames any
951 * more and the tasklet is killed.
952 */
Johannes Berg75636522008-07-09 14:40:35 +0200953 ieee80211_remove_interfaces(local);
Johannes Berg5b2812e2007-09-26 14:27:23 +0200954
Jiri Bencf0706e82007-05-05 11:45:53 -0700955 rtnl_unlock();
956
Johannes Berg3ac64be2009-08-17 16:16:53 +0200957 cancel_work_sync(&local->reconfig_filter);
958
Jiri Bencf0706e82007-05-05 11:45:53 -0700959 ieee80211_clear_tx_pending(local);
960 sta_info_stop(local);
961 rate_control_deinitialize(local);
Jiri Bence9f207f2007-05-05 11:46:38 -0700962 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700963
Jiri Bencf0706e82007-05-05 11:45:53 -0700964 if (skb_queue_len(&local->skb_queue)
965 || skb_queue_len(&local->skb_queue_unreliable))
966 printk(KERN_WARNING "%s: skb_queue not empty\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -0400967 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -0700968 skb_queue_purge(&local->skb_queue);
969 skb_queue_purge(&local->skb_queue_unreliable);
970
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400971 destroy_workqueue(local->workqueue);
Jiri Bencf0706e82007-05-05 11:45:53 -0700972 wiphy_unregister(local->hw.wiphy);
973 ieee80211_wep_free(local);
974 ieee80211_led_exit(local);
Johannes Berg5ba63532009-08-07 17:54:07 +0200975 kfree(local->int_scan_req);
Jiri Bencf0706e82007-05-05 11:45:53 -0700976}
977EXPORT_SYMBOL(ieee80211_unregister_hw);
978
979void ieee80211_free_hw(struct ieee80211_hw *hw)
980{
981 struct ieee80211_local *local = hw_to_local(hw);
982
Johannes Bergc771c9d2009-01-23 22:54:03 +0100983 mutex_destroy(&local->iflist_mtx);
Johannes Bergf3b85252009-04-23 16:01:47 +0200984 mutex_destroy(&local->scan_mtx);
Johannes Bergc771c9d2009-01-23 22:54:03 +0100985
Jiri Bencf0706e82007-05-05 11:45:53 -0700986 wiphy_free(local->hw.wiphy);
987}
988EXPORT_SYMBOL(ieee80211_free_hw);
989
Jiri Bencf0706e82007-05-05 11:45:53 -0700990static int __init ieee80211_init(void)
991{
992 struct sk_buff *skb;
993 int ret;
994
Johannes Berge039fa42008-05-15 12:55:29 +0200995 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
996 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
Johannes Bergc6a1fa12008-10-07 12:04:32 +0200997 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
Jiri Bencf0706e82007-05-05 11:45:53 -0700998
Felix Fietkaucccf1292008-10-05 18:07:45 +0200999 ret = rc80211_minstrel_init();
1000 if (ret)
1001 return ret;
1002
Johannes Berg4b475892008-01-02 15:17:03 +01001003 ret = rc80211_pid_init();
Mattias Nisslerad018372007-12-19 01:25:57 +01001004 if (ret)
David S. Miller51cb6db2008-07-15 03:34:57 -07001005 return ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07001006
Jiri Bence9f207f2007-05-05 11:46:38 -07001007 ieee80211_debugfs_netdev_init();
1008
Jiri Bencf0706e82007-05-05 11:45:53 -07001009 return 0;
1010}
1011
Jiri Bencf0706e82007-05-05 11:45:53 -07001012static void __exit ieee80211_exit(void)
1013{
Johannes Berg4b475892008-01-02 15:17:03 +01001014 rc80211_pid_exit();
Felix Fietkaucccf1292008-10-05 18:07:45 +02001015 rc80211_minstrel_exit();
Johannes Bergac71c692007-10-28 14:17:44 +01001016
Johannes Berg3b967662008-04-08 17:56:52 +02001017 /*
1018 * For key todo, it'll be empty by now but the work
1019 * might still be scheduled.
1020 */
1021 flush_scheduled_work();
1022
Luis Carlos Cobof7a92142008-02-23 15:17:18 +01001023 if (mesh_allocated)
1024 ieee80211s_stop();
Johannes Berg902acc72008-02-23 15:17:19 +01001025
Jiri Bence9f207f2007-05-05 11:46:38 -07001026 ieee80211_debugfs_netdev_exit();
Jiri Bencf0706e82007-05-05 11:45:53 -07001027}
1028
1029
Johannes Bergca9938f2007-09-11 12:50:32 +02001030subsys_initcall(ieee80211_init);
Jiri Bencf0706e82007-05-05 11:45:53 -07001031module_exit(ieee80211_exit);
1032
1033MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1034MODULE_LICENSE("GPL");