blob: 396cfb2d0f4646fdd93623131309e9b385f45e44 [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>
Eric W. Biederman881d9662007-09-17 11:56:21 -070024#include <net/net_namespace.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070025#include <net/cfg80211.h>
26
Jiri Bencf0706e82007-05-05 11:45:53 -070027#include "ieee80211_i.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040028#include "rate.h"
Luis Carlos Cobof7a92142008-02-23 15:17:18 +010029#include "mesh.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070030#include "wep.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070031#include "wme.h"
32#include "aes_ccm.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040033#include "led.h"
Michael Wue0eb6852007-09-18 17:29:21 -040034#include "cfg.h"
Jiri Bence9f207f2007-05-05 11:46:38 -070035#include "debugfs.h"
36#include "debugfs_netdev.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070037
Johannes Bergb306f452007-07-10 19:32:08 +020038/*
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
41 */
42struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
44 __le16 tx_flags;
45 u8 data_retries;
46} __attribute__ ((packed));
47
Johannes Bergb2c258f2007-07-27 15:43:23 +020048/* common interface routines */
Jiri Bencf0706e82007-05-05 11:45:53 -070049
Stephen Hemmingerb95cce32007-09-26 22:13:38 -070050static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
Jiri Bencf0706e82007-05-05 11:45:53 -070051{
Johannes Bergb2c258f2007-07-27 15:43:23 +020052 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
53 return ETH_ALEN;
Jiri Bencf0706e82007-05-05 11:45:53 -070054}
55
Johannes Berg4150c572007-09-17 01:29:23 -040056/* must be called under mdev tx lock */
57static void ieee80211_configure_filter(struct ieee80211_local *local)
58{
59 unsigned int changed_flags;
60 unsigned int new_flags = 0;
61
Johannes Berg53918992007-09-26 15:19:47 +020062 if (atomic_read(&local->iff_promiscs))
Johannes Berg4150c572007-09-17 01:29:23 -040063 new_flags |= FIF_PROMISC_IN_BSS;
64
Johannes Berg53918992007-09-26 15:19:47 +020065 if (atomic_read(&local->iff_allmultis))
Johannes Berg4150c572007-09-17 01:29:23 -040066 new_flags |= FIF_ALLMULTI;
67
68 if (local->monitors)
Michael Wu8cc9a732008-01-31 19:48:23 +010069 new_flags |= FIF_BCN_PRBRESP_PROMISC;
70
71 if (local->fif_fcsfail)
72 new_flags |= FIF_FCSFAIL;
73
74 if (local->fif_plcpfail)
75 new_flags |= FIF_PLCPFAIL;
76
77 if (local->fif_control)
78 new_flags |= FIF_CONTROL;
79
80 if (local->fif_other_bss)
81 new_flags |= FIF_OTHER_BSS;
Johannes Berg4150c572007-09-17 01:29:23 -040082
83 changed_flags = local->filter_flags ^ new_flags;
84
85 /* be a bit nasty */
86 new_flags |= (1<<31);
87
88 local->ops->configure_filter(local_to_hw(local),
89 changed_flags, &new_flags,
90 local->mdev->mc_count,
91 local->mdev->mc_list);
92
93 WARN_ON(new_flags & (1<<31));
94
95 local->filter_flags = new_flags & ~(1<<31);
96}
97
Johannes Bergb2c258f2007-07-27 15:43:23 +020098/* master interface */
Jiri Bencf0706e82007-05-05 11:45:53 -070099
100static int ieee80211_master_open(struct net_device *dev)
101{
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
103 struct ieee80211_sub_if_data *sdata;
104 int res = -EOPNOTSUPP;
105
Johannes Berg79010422007-09-18 17:29:21 -0400106 /* we hold the RTNL here so can safely walk the list */
107 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg3e122be2008-07-09 14:40:34 +0200108 if (netif_running(sdata->dev)) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700109 res = 0;
110 break;
111 }
112 }
Johannes Berg36d68252008-05-15 12:55:26 +0200113
114 if (res)
115 return res;
116
David S. Miller51cb6db2008-07-15 03:34:57 -0700117 netif_tx_start_all_queues(local->mdev);
Johannes Berg36d68252008-05-15 12:55:26 +0200118
119 return 0;
Jiri Bencf0706e82007-05-05 11:45:53 -0700120}
121
122static int ieee80211_master_stop(struct net_device *dev)
123{
124 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
125 struct ieee80211_sub_if_data *sdata;
126
Johannes Berg79010422007-09-18 17:29:21 -0400127 /* we hold the RTNL here so can safely walk the list */
128 list_for_each_entry(sdata, &local->interfaces, list)
Johannes Berg3e122be2008-07-09 14:40:34 +0200129 if (netif_running(sdata->dev))
Jiri Bencf0706e82007-05-05 11:45:53 -0700130 dev_close(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700131
132 return 0;
133}
134
Johannes Berg4150c572007-09-17 01:29:23 -0400135static void ieee80211_master_set_multicast_list(struct net_device *dev)
136{
137 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
138
139 ieee80211_configure_filter(local);
140}
141
Johannes Bergb2c258f2007-07-27 15:43:23 +0200142/* regular interfaces */
143
144static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
145{
Luis Carlos Cobof7a92142008-02-23 15:17:18 +0100146 int meshhdrlen;
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
148
149 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
150
Johannes Bergb2c258f2007-07-27 15:43:23 +0200151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
Luis Carlos Cobof7a92142008-02-23 15:17:18 +0100153 if (new_mtu < 256 ||
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
Johannes Bergb2c258f2007-07-27 15:43:23 +0200155 return -EINVAL;
156 }
157
158#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
159 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
160#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
161 dev->mtu = new_mtu;
162 return 0;
163}
164
165static inline int identical_mac_addr_allowed(int type1, int type2)
166{
167 return (type1 == IEEE80211_IF_TYPE_MNTR ||
168 type2 == IEEE80211_IF_TYPE_MNTR ||
169 (type1 == IEEE80211_IF_TYPE_AP &&
170 type2 == IEEE80211_IF_TYPE_WDS) ||
171 (type1 == IEEE80211_IF_TYPE_WDS &&
172 (type2 == IEEE80211_IF_TYPE_WDS ||
173 type2 == IEEE80211_IF_TYPE_AP)) ||
174 (type1 == IEEE80211_IF_TYPE_AP &&
175 type2 == IEEE80211_IF_TYPE_VLAN) ||
176 (type1 == IEEE80211_IF_TYPE_VLAN &&
177 (type2 == IEEE80211_IF_TYPE_AP ||
178 type2 == IEEE80211_IF_TYPE_VLAN)));
179}
180
Johannes Bergb2c258f2007-07-27 15:43:23 +0200181static int ieee80211_open(struct net_device *dev)
182{
183 struct ieee80211_sub_if_data *sdata, *nsdata;
184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
Tomas Winklerfc32f922008-07-03 01:27:13 +0300185 struct sta_info *sta;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200186 struct ieee80211_if_init_conf conf;
Tomas Winklerfc32f922008-07-03 01:27:13 +0300187 u32 changed = 0;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200188 int res;
Michael Bueschceffefd2008-02-10 14:16:52 +0100189 bool need_hw_reconfig = 0;
Luis Carlos Cobobdbe8192008-08-14 10:40:48 -0700190 u8 null_addr[ETH_ALEN] = {0};
Johannes Bergb2c258f2007-07-27 15:43:23 +0200191
192 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400193
Luis Carlos Cobobdbe8192008-08-14 10:40:48 -0700194 /* fail early if user set an invalid address */
195 if (compare_ether_addr(dev->dev_addr, null_addr) &&
196 !is_valid_ether_addr(dev->dev_addr))
197 return -EADDRNOTAVAIL;
198
Johannes Berg79010422007-09-18 17:29:21 -0400199 /* we hold the RTNL here so can safely walk the list */
200 list_for_each_entry(nsdata, &local->interfaces, list) {
Johannes Bergb2c258f2007-07-27 15:43:23 +0200201 struct net_device *ndev = nsdata->dev;
202
Johannes Berg3e122be2008-07-09 14:40:34 +0200203 if (ndev != dev && netif_running(ndev)) {
Johannes Berg665e8aa2008-02-21 01:10:07 +0100204 /*
205 * Allow only a single IBSS interface to be up at any
206 * time. This is restricted because beacon distribution
207 * cannot work properly if both are in the same IBSS.
208 *
209 * To remove this restriction we'd have to disallow them
210 * from setting the same SSID on different IBSS interfaces
211 * belonging to the same hardware. Then, however, we're
212 * faced with having to adopt two different TSF timers...
213 */
214 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
215 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
216 return -EBUSY;
217
218 /*
Johannes Berg665e8aa2008-02-21 01:10:07 +0100219 * The remaining checks are only performed for interfaces
220 * with the same MAC address.
221 */
222 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
223 continue;
224
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400225 /*
226 * check whether it may have the same address
227 */
Johannes Berg51fb61e2007-12-19 01:31:27 +0100228 if (!identical_mac_addr_allowed(sdata->vif.type,
229 nsdata->vif.type))
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400230 return -ENOTUNIQ;
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400231
232 /*
233 * can only add VLANs to enabled APs
234 */
Johannes Berg51fb61e2007-12-19 01:31:27 +0100235 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
Johannes Berg665e8aa2008-02-21 01:10:07 +0100236 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
Johannes Berg3e122be2008-07-09 14:40:34 +0200237 sdata->bss = &nsdata->u.ap;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200238 }
239 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200240
Johannes Berg51fb61e2007-12-19 01:31:27 +0100241 switch (sdata->vif.type) {
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400242 case IEEE80211_IF_TYPE_WDS:
Johannes Berge94e1062008-04-24 14:16:36 +0200243 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400244 return -ENOLINK;
245 break;
246 case IEEE80211_IF_TYPE_VLAN:
Johannes Berg3e122be2008-07-09 14:40:34 +0200247 if (!sdata->bss)
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400248 return -ENOLINK;
Johannes Berg3e122be2008-07-09 14:40:34 +0200249 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400250 break;
Johannes Bergfb1c1cd2007-09-26 15:19:43 +0200251 case IEEE80211_IF_TYPE_AP:
Johannes Berg3e122be2008-07-09 14:40:34 +0200252 sdata->bss = &sdata->u.ap;
253 break;
Luis Carlos Cobo8dbc1722008-08-06 13:17:54 +0200254 case IEEE80211_IF_TYPE_MESH_POINT:
255 /* mesh ifaces must set allmulti to forward mcast traffic */
256 atomic_inc(&local->iff_allmultis);
257 break;
Johannes Bergfb1c1cd2007-09-26 15:19:43 +0200258 case IEEE80211_IF_TYPE_STA:
259 case IEEE80211_IF_TYPE_MNTR:
260 case IEEE80211_IF_TYPE_IBSS:
261 /* no special treatment */
262 break;
Johannes Berga2897552007-09-28 14:01:25 +0200263 case IEEE80211_IF_TYPE_INVALID:
264 /* cannot happen */
265 WARN_ON(1);
266 break;
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400267 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200268
Johannes Bergb2c258f2007-07-27 15:43:23 +0200269 if (local->open_count == 0) {
270 res = 0;
Johannes Berg4150c572007-09-17 01:29:23 -0400271 if (local->ops->start)
272 res = local->ops->start(local_to_hw(local));
273 if (res)
Johannes Berg3e122be2008-07-09 14:40:34 +0200274 goto err_del_bss;
Michael Bueschceffefd2008-02-10 14:16:52 +0100275 need_hw_reconfig = 1;
Ivo van Doorncdcb0062008-01-07 19:45:24 +0100276 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200277 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200278
Luis Carlos Cobobdbe8192008-08-14 10:40:48 -0700279 /*
280 * Check all interfaces and copy the hopefully now-present
281 * MAC address to those that have the special null one.
282 */
283 list_for_each_entry(nsdata, &local->interfaces, list) {
284 struct net_device *ndev = nsdata->dev;
285
286 /*
287 * No need to check netif_running since we do not allow
288 * it to start up with this invalid address.
289 */
290 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
291 memcpy(ndev->dev_addr,
292 local->hw.wiphy->perm_addr,
293 ETH_ALEN);
294 }
295
296 if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
297 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
298 ETH_ALEN);
299
300 /*
301 * Validate the MAC address for this device.
302 */
303 if (!is_valid_ether_addr(dev->dev_addr)) {
304 if (!local->open_count && local->ops->stop)
305 local->ops->stop(local_to_hw(local));
306 return -EADDRNOTAVAIL;
307 }
308
Johannes Berg51fb61e2007-12-19 01:31:27 +0100309 switch (sdata->vif.type) {
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400310 case IEEE80211_IF_TYPE_VLAN:
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400311 /* no need to tell driver */
312 break;
Johannes Berg4150c572007-09-17 01:29:23 -0400313 case IEEE80211_IF_TYPE_MNTR:
Michael Wu3d30d942008-01-31 19:48:27 +0100314 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
315 local->cooked_mntrs++;
316 break;
317 }
318
Johannes Berg4150c572007-09-17 01:29:23 -0400319 /* must be before the call to ieee80211_configure_filter */
Johannes Bergb2c258f2007-07-27 15:43:23 +0200320 local->monitors++;
Michael Wu8cc9a732008-01-31 19:48:23 +0100321 if (local->monitors == 1)
Johannes Berg4150c572007-09-17 01:29:23 -0400322 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
Michael Wu8cc9a732008-01-31 19:48:23 +0100323
324 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
325 local->fif_fcsfail++;
326 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
327 local->fif_plcpfail++;
328 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
329 local->fif_control++;
330 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
331 local->fif_other_bss++;
332
David S. Millerb9e40852008-07-15 00:15:08 -0700333 netif_addr_lock_bh(local->mdev);
Michael Wu8cc9a732008-01-31 19:48:23 +0100334 ieee80211_configure_filter(local);
David S. Millerb9e40852008-07-15 00:15:08 -0700335 netif_addr_unlock_bh(local->mdev);
Johannes Berg4150c572007-09-17 01:29:23 -0400336 break;
337 case IEEE80211_IF_TYPE_STA:
338 case IEEE80211_IF_TYPE_IBSS:
339 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
340 /* fall through */
341 default:
Johannes Berg32bfd352007-12-19 01:31:26 +0100342 conf.vif = &sdata->vif;
Johannes Berg51fb61e2007-12-19 01:31:27 +0100343 conf.type = sdata->vif.type;
Johannes Berg4150c572007-09-17 01:29:23 -0400344 conf.mac_addr = dev->dev_addr;
345 res = local->ops->add_interface(local_to_hw(local), &conf);
Johannes Berg4150c572007-09-17 01:29:23 -0400346 if (res)
Johannes Berg636c5d42008-04-24 14:18:37 +0200347 goto err_stop;
Johannes Berg4150c572007-09-17 01:29:23 -0400348
Johannes Berg9d139c82008-07-09 14:40:37 +0200349 if (ieee80211_vif_is_mesh(&sdata->vif))
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200350 ieee80211_start_mesh(sdata);
351 changed |= ieee80211_reset_erp_info(sdata);
Tomas Winklerfc32f922008-07-03 01:27:13 +0300352 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg11a843b2007-08-28 17:01:55 -0400353 ieee80211_enable_keys(sdata);
Johannes Berg4150c572007-09-17 01:29:23 -0400354
Johannes Berg51fb61e2007-12-19 01:31:27 +0100355 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
Johannes Bergddd3d2b2007-09-26 17:53:20 +0200356 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
Johannes Berg4150c572007-09-17 01:29:23 -0400357 netif_carrier_off(dev);
358 else
359 netif_carrier_on(dev);
Daniel Draked9430a32007-07-27 15:43:24 +0200360 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200361
Johannes Berg636c5d42008-04-24 14:18:37 +0200362 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
363 /* Create STA entry for the WDS peer */
364 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
365 GFP_KERNEL);
366 if (!sta) {
367 res = -ENOMEM;
368 goto err_del_interface;
369 }
370
Johannes Berg07346f812008-05-03 01:02:02 +0200371 /* no locking required since STA is not live yet */
Johannes Berg636c5d42008-04-24 14:18:37 +0200372 sta->flags |= WLAN_STA_AUTHORIZED;
373
374 res = sta_info_insert(sta);
375 if (res) {
376 /* STA has been freed */
377 goto err_del_interface;
378 }
379 }
380
Johannes Berg4150c572007-09-17 01:29:23 -0400381 if (local->open_count == 0) {
382 res = dev_open(local->mdev);
383 WARN_ON(res);
Johannes Berg636c5d42008-04-24 14:18:37 +0200384 if (res)
385 goto err_del_interface;
Johannes Berg4150c572007-09-17 01:29:23 -0400386 tasklet_enable(&local->tx_pending_tasklet);
387 tasklet_enable(&local->tasklet);
388 }
389
Johannes Bergc1428b32007-11-16 02:54:53 +0100390 /*
391 * set_multicast_list will be invoked by the networking core
392 * which will check whether any increments here were done in
393 * error and sync them down to the hardware as filter flags.
394 */
395 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
396 atomic_inc(&local->iff_allmultis);
397
398 if (sdata->flags & IEEE80211_SDATA_PROMISC)
399 atomic_inc(&local->iff_promiscs);
400
Johannes Berg4150c572007-09-17 01:29:23 -0400401 local->open_count++;
Michael Bueschceffefd2008-02-10 14:16:52 +0100402 if (need_hw_reconfig)
403 ieee80211_hw_config(local);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200404
Jan Niehusmann64f851e2008-03-23 20:23:56 +0100405 /*
406 * ieee80211_sta_work is disabled while network interface
407 * is down. Therefore, some configuration changes may not
408 * yet be effective. Trigger execution of ieee80211_sta_work
409 * to fix this.
410 */
Johannes Berg988c0f72008-04-17 19:21:22 +0200411 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
412 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
Jan Niehusmann64f851e2008-03-23 20:23:56 +0100413 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
414 queue_work(local->hw.workqueue, &ifsta->work);
415 }
416
David S. Miller51cb6db2008-07-15 03:34:57 -0700417 netif_tx_start_all_queues(dev);
Johannes Berg4150c572007-09-17 01:29:23 -0400418
Johannes Bergb2c258f2007-07-27 15:43:23 +0200419 return 0;
Johannes Berg636c5d42008-04-24 14:18:37 +0200420 err_del_interface:
421 local->ops->remove_interface(local_to_hw(local), &conf);
422 err_stop:
423 if (!local->open_count && local->ops->stop)
424 local->ops->stop(local_to_hw(local));
Johannes Berg3e122be2008-07-09 14:40:34 +0200425 err_del_bss:
426 sdata->bss = NULL;
427 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
428 list_del(&sdata->u.vlan.list);
Johannes Berg636c5d42008-04-24 14:18:37 +0200429 return res;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200430}
431
Johannes Berg4150c572007-09-17 01:29:23 -0400432static int ieee80211_stop(struct net_device *dev)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200433{
Johannes Berg44213b52008-02-25 16:27:49 +0100434 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
435 struct ieee80211_local *local = sdata->local;
Johannes Berg4150c572007-09-17 01:29:23 -0400436 struct ieee80211_if_init_conf conf;
Ron Rindjunsky07db2182007-12-25 17:00:33 +0200437 struct sta_info *sta;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200438
Johannes Berg44213b52008-02-25 16:27:49 +0100439 /*
440 * Stop TX on this interface first.
441 */
David S. Miller51cb6db2008-07-15 03:34:57 -0700442 netif_tx_stop_all_queues(dev);
Johannes Berg4150c572007-09-17 01:29:23 -0400443
Johannes Berg44213b52008-02-25 16:27:49 +0100444 /*
445 * Now delete all active aggregation sessions.
446 */
Johannes Bergd0709a62008-02-25 16:27:46 +0100447 rcu_read_lock();
448
449 list_for_each_entry_rcu(sta, &local->sta_list, list) {
450 if (sta->sdata == sdata)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200451 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
Ron Rindjunsky07db2182007-12-25 17:00:33 +0200452 }
453
Johannes Bergd0709a62008-02-25 16:27:46 +0100454 rcu_read_unlock();
455
Johannes Berg44213b52008-02-25 16:27:49 +0100456 /*
457 * Remove all stations associated with this interface.
458 *
459 * This must be done before calling ops->remove_interface()
460 * because otherwise we can later invoke ops->sta_notify()
461 * whenever the STAs are removed, and that invalidates driver
462 * assumptions about always getting a vif pointer that is valid
463 * (because if we remove a STA after ops->remove_interface()
464 * the driver will have removed the vif info already!)
465 *
466 * We could relax this and only unlink the stations from the
467 * hash table and list but keep them on a per-sdata list that
468 * will be inserted back again when the interface is brought
469 * up again, but I don't currently see a use case for that,
470 * except with WDS which gets a STA entry created when it is
471 * brought up.
472 */
473 sta_info_flush(local, sdata);
Johannes Berg4150c572007-09-17 01:29:23 -0400474
Johannes Bergc1428b32007-11-16 02:54:53 +0100475 /*
476 * Don't count this interface for promisc/allmulti while it
477 * is down. dev_mc_unsync() will invoke set_multicast_list
478 * on the master interface which will sync these down to the
479 * hardware as filter flags.
480 */
481 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
482 atomic_dec(&local->iff_allmultis);
483
484 if (sdata->flags & IEEE80211_SDATA_PROMISC)
485 atomic_dec(&local->iff_promiscs);
486
Johannes Berg4150c572007-09-17 01:29:23 -0400487 dev_mc_unsync(local->mdev, dev);
488
Johannes Berg5dfdaf52007-12-19 02:03:33 +0100489 /* APs need special treatment */
Johannes Berg51fb61e2007-12-19 01:31:27 +0100490 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400491 struct ieee80211_sub_if_data *vlan, *tmp;
Johannes Berg5dfdaf52007-12-19 02:03:33 +0100492 struct beacon_data *old_beacon = sdata->u.ap.beacon;
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400493
Johannes Berg5dfdaf52007-12-19 02:03:33 +0100494 /* remove beacon */
495 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
496 synchronize_rcu();
497 kfree(old_beacon);
498
499 /* down all dependent devices, that is VLANs */
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400500 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
501 u.vlan.list)
502 dev_close(vlan->dev);
503 WARN_ON(!list_empty(&sdata->u.ap.vlans));
504 }
505
Johannes Berg4150c572007-09-17 01:29:23 -0400506 local->open_count--;
507
Johannes Berg51fb61e2007-12-19 01:31:27 +0100508 switch (sdata->vif.type) {
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400509 case IEEE80211_IF_TYPE_VLAN:
510 list_del(&sdata->u.vlan.list);
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400511 /* no need to tell driver */
512 break;
Johannes Berg4150c572007-09-17 01:29:23 -0400513 case IEEE80211_IF_TYPE_MNTR:
Michael Wu3d30d942008-01-31 19:48:27 +0100514 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
515 local->cooked_mntrs--;
516 break;
517 }
518
Johannes Berg4150c572007-09-17 01:29:23 -0400519 local->monitors--;
Michael Wu8cc9a732008-01-31 19:48:23 +0100520 if (local->monitors == 0)
Michael Wu8b393f12007-11-28 01:57:08 -0500521 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
Michael Wu8cc9a732008-01-31 19:48:23 +0100522
523 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
524 local->fif_fcsfail--;
525 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
526 local->fif_plcpfail--;
527 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
528 local->fif_control--;
529 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
530 local->fif_other_bss--;
531
David S. Millerb9e40852008-07-15 00:15:08 -0700532 netif_addr_lock_bh(local->mdev);
Michael Wu8cc9a732008-01-31 19:48:23 +0100533 ieee80211_configure_filter(local);
David S. Millerb9e40852008-07-15 00:15:08 -0700534 netif_addr_unlock_bh(local->mdev);
Johannes Berg4150c572007-09-17 01:29:23 -0400535 break;
Luis Carlos Cobof7a92142008-02-23 15:17:18 +0100536 case IEEE80211_IF_TYPE_MESH_POINT:
Luis Carlos Cobo8dbc1722008-08-06 13:17:54 +0200537 /* allmulti is always set on mesh ifaces */
538 atomic_dec(&local->iff_allmultis);
539 /* fall through */
Johannes Bergb2c258f2007-07-27 15:43:23 +0200540 case IEEE80211_IF_TYPE_STA:
541 case IEEE80211_IF_TYPE_IBSS:
Tomas Winkler48c2fc52008-08-06 14:22:01 +0300542 sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
Assaf Kraussad81b2f2008-06-04 20:27:59 +0300543 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200544 del_timer_sync(&sdata->u.sta.timer);
Johannes Berg2a8a9a82007-08-28 17:01:52 -0400545 /*
Johannes Berg79010422007-09-18 17:29:21 -0400546 * When we get here, the interface is marked down.
547 * Call synchronize_rcu() to wait for the RX path
548 * should it be using the interface and enqueuing
549 * frames at this very time on another CPU.
Johannes Berg2a8a9a82007-08-28 17:01:52 -0400550 */
Johannes Berg79010422007-09-18 17:29:21 -0400551 synchronize_rcu();
Johannes Bergb2c258f2007-07-27 15:43:23 +0200552 skb_queue_purge(&sdata->u.sta.skb_queue);
Johannes Berg2a8a9a82007-08-28 17:01:52 -0400553
Zhu Yiece8edd2007-11-22 10:53:21 +0800554 if (local->scan_dev == sdata->dev) {
555 if (!local->ops->hw_scan) {
556 local->sta_sw_scanning = 0;
557 cancel_delayed_work(&local->scan_work);
558 } else
559 local->sta_hw_scanning = 0;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200560 }
Zhu Yiece8edd2007-11-22 10:53:21 +0800561
Zhu Yia10605e2007-11-22 11:10:22 +0800562 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
563 kfree(sdata->u.sta.extra_ie);
564 sdata->u.sta.extra_ie = NULL;
565 sdata->u.sta.extra_ie_len = 0;
Johannes Berg4150c572007-09-17 01:29:23 -0400566 /* fall through */
567 default:
Johannes Berg32bfd352007-12-19 01:31:26 +0100568 conf.vif = &sdata->vif;
Johannes Berg51fb61e2007-12-19 01:31:27 +0100569 conf.type = sdata->vif.type;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200570 conf.mac_addr = dev->dev_addr;
Johannes Berg4150c572007-09-17 01:29:23 -0400571 /* disable all keys for as long as this netdev is down */
572 ieee80211_disable_keys(sdata);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200573 local->ops->remove_interface(local_to_hw(local), &conf);
574 }
575
Johannes Berg3e122be2008-07-09 14:40:34 +0200576 sdata->bss = NULL;
577
Johannes Berg4150c572007-09-17 01:29:23 -0400578 if (local->open_count == 0) {
579 if (netif_running(local->mdev))
580 dev_close(local->mdev);
581
Johannes Berg4150c572007-09-17 01:29:23 -0400582 if (local->ops->stop)
583 local->ops->stop(local_to_hw(local));
584
Ivo van Doorncdcb0062008-01-07 19:45:24 +0100585 ieee80211_led_radio(local, 0);
586
Ivo van Doornea0c9252008-07-03 19:02:44 +0200587 flush_workqueue(local->hw.workqueue);
588
Johannes Berg4150c572007-09-17 01:29:23 -0400589 tasklet_disable(&local->tx_pending_tasklet);
590 tasklet_disable(&local->tasklet);
591 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200592
593 return 0;
594}
595
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200596int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
597{
598 struct ieee80211_local *local = hw_to_local(hw);
599 struct sta_info *sta;
600 struct ieee80211_sub_if_data *sdata;
Johannes Berg7f93ea32008-08-06 21:45:26 +0200601 u16 start_seq_num;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200602 u8 *state;
603 int ret;
604 DECLARE_MAC_BUF(mac);
605
606 if (tid >= STA_TID_NUM)
607 return -EINVAL;
608
609#ifdef CONFIG_MAC80211_HT_DEBUG
610 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
611 print_mac(mac, ra), tid);
612#endif /* CONFIG_MAC80211_HT_DEBUG */
613
Johannes Bergd0709a62008-02-25 16:27:46 +0100614 rcu_read_lock();
615
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200616 sta = sta_info_get(local, ra);
617 if (!sta) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200618#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200619 printk(KERN_DEBUG "Could not find the station\n");
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200620#endif
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300621 ret = -ENOENT;
622 goto exit;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200623 }
624
Johannes Berg07346f812008-05-03 01:02:02 +0200625 spin_lock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200626
627 /* we have tried too many times, receiver does not want A-MPDU */
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200628 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200629 ret = -EBUSY;
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300630 goto err_unlock_sta;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200631 }
632
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200633 state = &sta->ampdu_mlme.tid_state_tx[tid];
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200634 /* check if the TID is not in aggregation flow already */
635 if (*state != HT_AGG_STATE_IDLE) {
636#ifdef CONFIG_MAC80211_HT_DEBUG
637 printk(KERN_DEBUG "BA request denied - session is not "
638 "idle on tid %u\n", tid);
639#endif /* CONFIG_MAC80211_HT_DEBUG */
640 ret = -EAGAIN;
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300641 goto err_unlock_sta;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200642 }
643
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200644 /* prepare A-MPDU MLME for Tx aggregation */
645 sta->ampdu_mlme.tid_tx[tid] =
646 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
647 if (!sta->ampdu_mlme.tid_tx[tid]) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200648#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200649 if (net_ratelimit())
650 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
651 tid);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200652#endif
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200653 ret = -ENOMEM;
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300654 goto err_unlock_sta;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200655 }
656 /* Tx timer */
657 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
658 sta_addba_resp_timer_expired;
659 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
660 (unsigned long)&sta->timer_to_tid[tid];
661 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
662
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200663 /* create a new queue for this aggregation */
Ron Rindjunsky9e723492008-01-28 14:07:18 +0200664 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200665
666 /* case no queue is available to aggregation
667 * don't switch to aggregation */
668 if (ret) {
669#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200670 printk(KERN_DEBUG "BA request denied - queue unavailable for"
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200671 " tid %d\n", tid);
672#endif /* CONFIG_MAC80211_HT_DEBUG */
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300673 goto err_unlock_queue;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200674 }
Johannes Bergd0709a62008-02-25 16:27:46 +0100675 sdata = sta->sdata;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200676
677 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
678 * call back right away, it must see that the flow has begun */
679 *state |= HT_ADDBA_REQUESTED_MSK;
680
Johannes Berg7f93ea32008-08-06 21:45:26 +0200681 /* This is slightly racy because the queue isn't stopped */
682 start_seq_num = sta->tid_seq[tid];
683
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200684 if (local->ops->ampdu_action)
685 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
686 ra, tid, &start_seq_num);
687
688 if (ret) {
689 /* No need to requeue the packets in the agg queue, since we
690 * held the tx lock: no packet could be enqueued to the newly
691 * allocated queue */
David S. Miller51cb6db2008-07-15 03:34:57 -0700692 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200693#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200694 printk(KERN_DEBUG "BA request denied - HW unavailable for"
695 " tid %d\n", tid);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200696#endif /* CONFIG_MAC80211_HT_DEBUG */
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200697 *state = HT_AGG_STATE_IDLE;
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300698 goto err_unlock_queue;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200699 }
700
701 /* Will put all the packets in the new SW queue */
Ron Rindjunsky9e723492008-01-28 14:07:18 +0200702 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300703 spin_unlock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200704
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200705 /* send an addBA request */
706 sta->ampdu_mlme.dialog_token_allocator++;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200707 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200708 sta->ampdu_mlme.dialog_token_allocator;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200709 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200710
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300711
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200712 ieee80211_send_addba_request(sta->sdata, ra, tid,
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200713 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
714 sta->ampdu_mlme.tid_tx[tid]->ssn,
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200715 0x40, 5000);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200716 /* activate the timer for the recipient's addBA response */
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200717 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200718 jiffies + ADDBA_RESP_INTERVAL;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200719 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200720#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200721 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200722#endif
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300723 goto exit;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200724
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300725err_unlock_queue:
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200726 kfree(sta->ampdu_mlme.tid_tx[tid]);
727 sta->ampdu_mlme.tid_tx[tid] = NULL;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200728 ret = -EBUSY;
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300729err_unlock_sta:
Johannes Berg07346f812008-05-03 01:02:02 +0200730 spin_unlock_bh(&sta->lock);
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300731exit:
Johannes Bergd0709a62008-02-25 16:27:46 +0100732 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200733 return ret;
734}
735EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
736
737int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
738 u8 *ra, u16 tid,
739 enum ieee80211_back_parties initiator)
740{
741 struct ieee80211_local *local = hw_to_local(hw);
742 struct sta_info *sta;
743 u8 *state;
744 int ret = 0;
745 DECLARE_MAC_BUF(mac);
746
747 if (tid >= STA_TID_NUM)
748 return -EINVAL;
749
Johannes Bergd0709a62008-02-25 16:27:46 +0100750 rcu_read_lock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200751 sta = sta_info_get(local, ra);
Johannes Bergd0709a62008-02-25 16:27:46 +0100752 if (!sta) {
753 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200754 return -ENOENT;
Johannes Bergd0709a62008-02-25 16:27:46 +0100755 }
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200756
757 /* check if the TID is in aggregation */
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200758 state = &sta->ampdu_mlme.tid_state_tx[tid];
Johannes Berg07346f812008-05-03 01:02:02 +0200759 spin_lock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200760
761 if (*state != HT_AGG_STATE_OPERATIONAL) {
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200762 ret = -ENOENT;
763 goto stop_BA_exit;
764 }
765
Ron Rindjunsky513a1022008-04-07 10:16:56 -0700766#ifdef CONFIG_MAC80211_HT_DEBUG
767 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
768 print_mac(mac, ra), tid);
769#endif /* CONFIG_MAC80211_HT_DEBUG */
770
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200771 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
772
773 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
774 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
775
776 if (local->ops->ampdu_action)
777 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
778 ra, tid, NULL);
779
780 /* case HW denied going back to legacy */
781 if (ret) {
782 WARN_ON(ret != -EBUSY);
783 *state = HT_AGG_STATE_OPERATIONAL;
784 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
785 goto stop_BA_exit;
786 }
787
788stop_BA_exit:
Johannes Berg07346f812008-05-03 01:02:02 +0200789 spin_unlock_bh(&sta->lock);
Johannes Bergd0709a62008-02-25 16:27:46 +0100790 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200791 return ret;
792}
793EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
794
795void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
796{
797 struct ieee80211_local *local = hw_to_local(hw);
798 struct sta_info *sta;
799 u8 *state;
800 DECLARE_MAC_BUF(mac);
801
802 if (tid >= STA_TID_NUM) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200803#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200804 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
805 tid, STA_TID_NUM);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200806#endif
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200807 return;
808 }
809
Johannes Bergd0709a62008-02-25 16:27:46 +0100810 rcu_read_lock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200811 sta = sta_info_get(local, ra);
812 if (!sta) {
Johannes Bergd0709a62008-02-25 16:27:46 +0100813 rcu_read_unlock();
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200814#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200815 printk(KERN_DEBUG "Could not find station: %s\n",
816 print_mac(mac, ra));
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200817#endif
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200818 return;
819 }
820
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200821 state = &sta->ampdu_mlme.tid_state_tx[tid];
Johannes Berg07346f812008-05-03 01:02:02 +0200822 spin_lock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200823
824 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200825#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200826 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
827 *state);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200828#endif
Johannes Berg07346f812008-05-03 01:02:02 +0200829 spin_unlock_bh(&sta->lock);
Johannes Bergd0709a62008-02-25 16:27:46 +0100830 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200831 return;
832 }
833
834 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
835
836 *state |= HT_ADDBA_DRV_READY_MSK;
837
838 if (*state == HT_AGG_STATE_OPERATIONAL) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200839#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200840 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200841#endif
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200842 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
843 }
Johannes Berg07346f812008-05-03 01:02:02 +0200844 spin_unlock_bh(&sta->lock);
Johannes Bergd0709a62008-02-25 16:27:46 +0100845 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200846}
847EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
848
849void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
850{
851 struct ieee80211_local *local = hw_to_local(hw);
852 struct sta_info *sta;
853 u8 *state;
854 int agg_queue;
855 DECLARE_MAC_BUF(mac);
856
857 if (tid >= STA_TID_NUM) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200858#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200859 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
860 tid, STA_TID_NUM);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200861#endif
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200862 return;
863 }
864
Ron Rindjunsky513a1022008-04-07 10:16:56 -0700865#ifdef CONFIG_MAC80211_HT_DEBUG
866 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200867 print_mac(mac, ra), tid);
Ron Rindjunsky513a1022008-04-07 10:16:56 -0700868#endif /* CONFIG_MAC80211_HT_DEBUG */
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200869
Johannes Bergd0709a62008-02-25 16:27:46 +0100870 rcu_read_lock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200871 sta = sta_info_get(local, ra);
872 if (!sta) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200873#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200874 printk(KERN_DEBUG "Could not find station: %s\n",
875 print_mac(mac, ra));
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200876#endif
Johannes Bergd0709a62008-02-25 16:27:46 +0100877 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200878 return;
879 }
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200880 state = &sta->ampdu_mlme.tid_state_tx[tid];
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200881
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300882 /* NOTE: no need to use sta->lock in this state check, as
David S. Miller51cb6db2008-07-15 03:34:57 -0700883 * ieee80211_stop_tx_ba_session will let only one stop call to
884 * pass through per sta/tid
885 */
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200886 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200887#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200888 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200889#endif
Johannes Bergd0709a62008-02-25 16:27:46 +0100890 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200891 return;
892 }
893
894 if (*state & HT_AGG_STATE_INITIATOR_MSK)
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200895 ieee80211_send_delba(sta->sdata, ra, tid,
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200896 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
897
898 agg_queue = sta->tid_to_tx_q[tid];
899
Ron Rindjunsky9e723492008-01-28 14:07:18 +0200900 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200901
David S. Miller51cb6db2008-07-15 03:34:57 -0700902 /* We just requeued the all the frames that were in the
903 * removed queue, and since we might miss a softirq we do
904 * netif_schedule_queue. ieee80211_wake_queue is not used
905 * here as this queue is not necessarily stopped
906 */
907 netif_schedule_queue(netdev_get_tx_queue(local->mdev, agg_queue));
Tomas Winklerb83f4e12008-05-27 17:50:52 +0300908 spin_lock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200909 *state = HT_AGG_STATE_IDLE;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200910 sta->ampdu_mlme.addba_req_num[tid] = 0;
911 kfree(sta->ampdu_mlme.tid_tx[tid]);
912 sta->ampdu_mlme.tid_tx[tid] = NULL;
Johannes Berg07346f812008-05-03 01:02:02 +0200913 spin_unlock_bh(&sta->lock);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200914
Johannes Bergd0709a62008-02-25 16:27:46 +0100915 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200916}
917EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
918
919void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
920 const u8 *ra, u16 tid)
921{
922 struct ieee80211_local *local = hw_to_local(hw);
923 struct ieee80211_ra_tid *ra_tid;
924 struct sk_buff *skb = dev_alloc_skb(0);
925
926 if (unlikely(!skb)) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200927#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200928 if (net_ratelimit())
929 printk(KERN_WARNING "%s: Not enough memory, "
930 "dropping start BA session", skb->dev->name);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200931#endif
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200932 return;
933 }
934 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
935 memcpy(&ra_tid->ra, ra, ETH_ALEN);
936 ra_tid->tid = tid;
937
938 skb->pkt_type = IEEE80211_ADDBA_MSG;
939 skb_queue_tail(&local->skb_queue, skb);
940 tasklet_schedule(&local->tasklet);
941}
942EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
943
944void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
945 const u8 *ra, u16 tid)
946{
947 struct ieee80211_local *local = hw_to_local(hw);
948 struct ieee80211_ra_tid *ra_tid;
949 struct sk_buff *skb = dev_alloc_skb(0);
950
951 if (unlikely(!skb)) {
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200952#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200953 if (net_ratelimit())
954 printk(KERN_WARNING "%s: Not enough memory, "
955 "dropping stop BA session", skb->dev->name);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200956#endif
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200957 return;
958 }
959 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
960 memcpy(&ra_tid->ra, ra, ETH_ALEN);
961 ra_tid->tid = tid;
962
963 skb->pkt_type = IEEE80211_DELBA_MSG;
964 skb_queue_tail(&local->skb_queue, skb);
965 tasklet_schedule(&local->tasklet);
966}
967EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
968
Johannes Bergb2c258f2007-07-27 15:43:23 +0200969static void ieee80211_set_multicast_list(struct net_device *dev)
970{
971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
972 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg4150c572007-09-17 01:29:23 -0400973 int allmulti, promisc, sdata_allmulti, sdata_promisc;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200974
Johannes Berg4150c572007-09-17 01:29:23 -0400975 allmulti = !!(dev->flags & IFF_ALLMULTI);
976 promisc = !!(dev->flags & IFF_PROMISC);
Johannes Bergb52f2192007-11-16 01:49:11 +0100977 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
978 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
Johannes Berg4150c572007-09-17 01:29:23 -0400979
980 if (allmulti != sdata_allmulti) {
981 if (dev->flags & IFF_ALLMULTI)
Johannes Berg53918992007-09-26 15:19:47 +0200982 atomic_inc(&local->iff_allmultis);
Johannes Berg4150c572007-09-17 01:29:23 -0400983 else
Johannes Berg53918992007-09-26 15:19:47 +0200984 atomic_dec(&local->iff_allmultis);
Jiri Slaby13262ff2007-08-28 17:01:54 -0400985 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200986 }
Johannes Berg4150c572007-09-17 01:29:23 -0400987
988 if (promisc != sdata_promisc) {
989 if (dev->flags & IFF_PROMISC)
Johannes Berg53918992007-09-26 15:19:47 +0200990 atomic_inc(&local->iff_promiscs);
Johannes Berg4150c572007-09-17 01:29:23 -0400991 else
Johannes Berg53918992007-09-26 15:19:47 +0200992 atomic_dec(&local->iff_promiscs);
Jiri Slaby13262ff2007-08-28 17:01:54 -0400993 sdata->flags ^= IEEE80211_SDATA_PROMISC;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200994 }
Johannes Berg4150c572007-09-17 01:29:23 -0400995
996 dev_mc_sync(local->mdev, dev);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200997}
998
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700999static const struct header_ops ieee80211_header_ops = {
1000 .create = eth_header,
1001 .parse = header_parse_80211,
1002 .rebuild = eth_rebuild_header,
1003 .cache = eth_header_cache,
1004 .cache_update = eth_header_cache_update,
1005};
1006
Johannes Bergb2c258f2007-07-27 15:43:23 +02001007void ieee80211_if_setup(struct net_device *dev)
1008{
1009 ether_setup(dev);
1010 dev->hard_start_xmit = ieee80211_subif_start_xmit;
1011 dev->wireless_handlers = &ieee80211_iw_handler_def;
1012 dev->set_multicast_list = ieee80211_set_multicast_list;
1013 dev->change_mtu = ieee80211_change_mtu;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001014 dev->open = ieee80211_open;
1015 dev->stop = ieee80211_stop;
Johannes Berg75636522008-07-09 14:40:35 +02001016 dev->destructor = free_netdev;
Luis Carlos Cobobdbe8192008-08-14 10:40:48 -07001017 /* we will validate the address ourselves in ->open */
1018 dev->validate_addr = NULL;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001019}
1020
Johannes Bergb2c258f2007-07-27 15:43:23 +02001021/* everything else */
1022
Johannes Berg9d139c82008-07-09 14:40:37 +02001023int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
Johannes Bergb2c258f2007-07-27 15:43:23 +02001024{
Johannes Berg9d139c82008-07-09 14:40:37 +02001025 struct ieee80211_local *local = sdata->local;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001026 struct ieee80211_if_conf conf;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001027
Johannes Berg9d139c82008-07-09 14:40:37 +02001028 if (WARN_ON(!netif_running(sdata->dev)))
1029 return 0;
1030
1031 if (!local->ops->config_interface)
Johannes Bergb2c258f2007-07-27 15:43:23 +02001032 return 0;
1033
1034 memset(&conf, 0, sizeof(conf));
Johannes Berg9d139c82008-07-09 14:40:37 +02001035 conf.changed = changed;
1036
Johannes Berg51fb61e2007-12-19 01:31:27 +01001037 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1038 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
Johannes Berg4150c572007-09-17 01:29:23 -04001039 conf.bssid = sdata->u.sta.bssid;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001040 conf.ssid = sdata->u.sta.ssid;
1041 conf.ssid_len = sdata->u.sta.ssid_len;
Johannes Berg51fb61e2007-12-19 01:31:27 +01001042 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
Johannes Berg9d139c82008-07-09 14:40:37 +02001043 conf.bssid = sdata->dev->dev_addr;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001044 conf.ssid = sdata->u.ap.ssid;
1045 conf.ssid_len = sdata->u.ap.ssid_len;
Johannes Berg9d139c82008-07-09 14:40:37 +02001046 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1047 u8 zero[ETH_ALEN] = { 0 };
1048 conf.bssid = zero;
1049 conf.ssid = zero;
1050 conf.ssid_len = 0;
1051 } else {
1052 WARN_ON(1);
1053 return -EINVAL;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001054 }
Johannes Berg9d139c82008-07-09 14:40:37 +02001055
1056 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
1057 return -EINVAL;
1058
1059 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
1060 return -EINVAL;
1061
Johannes Bergb2c258f2007-07-27 15:43:23 +02001062 return local->ops->config_interface(local_to_hw(local),
Johannes Berg32bfd352007-12-19 01:31:26 +01001063 &sdata->vif, &conf);
Johannes Bergb2c258f2007-07-27 15:43:23 +02001064}
1065
Johannes Bergb2c258f2007-07-27 15:43:23 +02001066int ieee80211_hw_config(struct ieee80211_local *local)
1067{
Johannes Bergb2c258f2007-07-27 15:43:23 +02001068 struct ieee80211_channel *chan;
1069 int ret = 0;
1070
Johannes Berg8318d782008-01-24 19:38:38 +01001071 if (local->sta_sw_scanning)
Johannes Bergb2c258f2007-07-27 15:43:23 +02001072 chan = local->scan_channel;
Johannes Berg8318d782008-01-24 19:38:38 +01001073 else
Johannes Bergb2c258f2007-07-27 15:43:23 +02001074 chan = local->oper_channel;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001075
Johannes Berg8318d782008-01-24 19:38:38 +01001076 local->hw.conf.channel = chan;
1077
1078 if (!local->hw.conf.power_level)
1079 local->hw.conf.power_level = chan->max_power;
1080 else
1081 local->hw.conf.power_level = min(chan->max_power,
1082 local->hw.conf.power_level);
1083
1084 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001085
1086#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Berg8318d782008-01-24 19:38:38 +01001087 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1088 wiphy_name(local->hw.wiphy), chan->center_freq);
1089#endif
Johannes Bergb2c258f2007-07-27 15:43:23 +02001090
Michael Bueschf7c4dae2007-09-24 18:41:49 +02001091 if (local->open_count)
Johannes Bergb2c258f2007-07-27 15:43:23 +02001092 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1093
1094 return ret;
1095}
1096
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001097/**
Tomas Winkler38668c02008-03-28 16:33:32 -07001098 * ieee80211_handle_ht should be used only after legacy configuration
1099 * has been determined namely band, as ht configuration depends upon
1100 * the hardware's HT abilities for a _specific_ band.
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001101 */
Tomas Winkler38668c02008-03-28 16:33:32 -07001102u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001103 struct ieee80211_ht_info *req_ht_cap,
1104 struct ieee80211_ht_bss_info *req_bss_cap)
1105{
1106 struct ieee80211_conf *conf = &local->hw.conf;
Johannes Berg8318d782008-01-24 19:38:38 +01001107 struct ieee80211_supported_band *sband;
Tomas Winkler38668c02008-03-28 16:33:32 -07001108 struct ieee80211_ht_info ht_conf;
1109 struct ieee80211_ht_bss_info ht_bss_conf;
Tomas Winkler38668c02008-03-28 16:33:32 -07001110 u32 changed = 0;
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +08001111 int i;
1112 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1113 u8 tx_mcs_set_cap;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001114
Johannes Berg8318d782008-01-24 19:38:38 +01001115 sband = local->hw.wiphy->bands[conf->channel->band];
1116
Tomas Winkler38668c02008-03-28 16:33:32 -07001117 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1118 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1119
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +08001120 /* HT is not supported */
1121 if (!sband->ht_info.ht_supported) {
1122 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1123 goto out;
1124 }
Tomas Winkler38668c02008-03-28 16:33:32 -07001125
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +08001126 /* disable HT */
1127 if (!enable_ht) {
Tomas Winkler38668c02008-03-28 16:33:32 -07001128 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1129 changed |= BSS_CHANGED_HT;
1130 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +08001131 conf->ht_conf.ht_supported = 0;
1132 goto out;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001133 }
1134
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +08001135
1136 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1137 changed |= BSS_CHANGED_HT;
1138
1139 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1140 ht_conf.ht_supported = 1;
1141
1142 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1143 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1144 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1145 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1146 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1147 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1148
1149 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1150 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1151
1152 /* Bits 96-100 */
1153 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1154
1155 /* configure suppoerted Tx MCS according to requested MCS
1156 * (based in most cases on Rx capabilities of peer) and self
1157 * Tx MCS capabilities (as defined by low level driver HW
1158 * Tx capabilities) */
1159 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1160 goto check_changed;
1161
1162 /* Counting from 0 therfore + 1 */
1163 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1164 max_tx_streams = ((tx_mcs_set_cap &
1165 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1166
1167 for (i = 0; i < max_tx_streams; i++)
1168 ht_conf.supp_mcs_set[i] =
1169 sband->ht_info.supp_mcs_set[i] &
1170 req_ht_cap->supp_mcs_set[i];
1171
1172 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1173 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1174 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1175 ht_conf.supp_mcs_set[i] =
1176 sband->ht_info.supp_mcs_set[i] &
1177 req_ht_cap->supp_mcs_set[i];
1178
1179check_changed:
1180 /* if bss configuration changed store the new one */
1181 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1182 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1183 changed |= BSS_CHANGED_HT;
1184 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1185 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1186 }
1187out:
Tomas Winkler38668c02008-03-28 16:33:32 -07001188 return changed;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001189}
1190
Johannes Berg471b3ef2007-12-28 14:32:58 +01001191void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1192 u32 changed)
Daniel Draked9430a32007-07-27 15:43:24 +02001193{
Johannes Berg471b3ef2007-12-28 14:32:58 +01001194 struct ieee80211_local *local = sdata->local;
1195
1196 if (!changed)
1197 return;
1198
1199 if (local->ops->bss_info_changed)
1200 local->ops->bss_info_changed(local_to_hw(local),
1201 &sdata->vif,
1202 &sdata->bss_conf,
1203 changed);
Daniel Draked9430a32007-07-27 15:43:24 +02001204}
1205
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001206u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
Daniel Draked9430a32007-07-27 15:43:24 +02001207{
Johannes Berg471b3ef2007-12-28 14:32:58 +01001208 sdata->bss_conf.use_cts_prot = 0;
1209 sdata->bss_conf.use_short_preamble = 0;
Tomas Winklerfc32f922008-07-03 01:27:13 +03001210 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
Daniel Draked9430a32007-07-27 15:43:24 +02001211}
1212
Jiri Bencf0706e82007-05-05 11:45:53 -07001213void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
Johannes Berge039fa42008-05-15 12:55:29 +02001214 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07001215{
1216 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berge039fa42008-05-15 12:55:29 +02001217 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -07001218 int tmp;
1219
1220 skb->dev = local->mdev;
Jiri Bencf0706e82007-05-05 11:45:53 -07001221 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
Johannes Berge039fa42008-05-15 12:55:29 +02001222 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
Jiri Bencf0706e82007-05-05 11:45:53 -07001223 &local->skb_queue : &local->skb_queue_unreliable, skb);
1224 tmp = skb_queue_len(&local->skb_queue) +
1225 skb_queue_len(&local->skb_queue_unreliable);
1226 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1227 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001228 dev_kfree_skb_irq(skb);
1229 tmp--;
1230 I802_DEBUG_INC(local->tx_status_drop);
1231 }
1232 tasklet_schedule(&local->tasklet);
1233}
1234EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1235
1236static void ieee80211_tasklet_handler(unsigned long data)
1237{
1238 struct ieee80211_local *local = (struct ieee80211_local *) data;
1239 struct sk_buff *skb;
1240 struct ieee80211_rx_status rx_status;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001241 struct ieee80211_ra_tid *ra_tid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001242
1243 while ((skb = skb_dequeue(&local->skb_queue)) ||
1244 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1245 switch (skb->pkt_type) {
1246 case IEEE80211_RX_MSG:
1247 /* status is in skb->cb */
1248 memcpy(&rx_status, skb->cb, sizeof(rx_status));
Johannes Berg51fb61e2007-12-19 01:31:27 +01001249 /* Clear skb->pkt_type in order to not confuse kernel
Jiri Bencf0706e82007-05-05 11:45:53 -07001250 * netstack. */
1251 skb->pkt_type = 0;
1252 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1253 break;
1254 case IEEE80211_TX_STATUS_MSG:
Jiri Bencf0706e82007-05-05 11:45:53 -07001255 skb->pkt_type = 0;
Johannes Berge039fa42008-05-15 12:55:29 +02001256 ieee80211_tx_status(local_to_hw(local), skb);
Jiri Bencf0706e82007-05-05 11:45:53 -07001257 break;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001258 case IEEE80211_DELBA_MSG:
1259 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1260 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1261 ra_tid->ra, ra_tid->tid);
1262 dev_kfree_skb(skb);
1263 break;
1264 case IEEE80211_ADDBA_MSG:
1265 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1266 ieee80211_start_tx_ba_cb(local_to_hw(local),
1267 ra_tid->ra, ra_tid->tid);
1268 dev_kfree_skb(skb);
1269 break ;
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001270 default:
1271 WARN_ON(1);
Jiri Bencf0706e82007-05-05 11:45:53 -07001272 dev_kfree_skb(skb);
1273 break;
1274 }
1275 }
1276}
1277
Jiri Bencf0706e82007-05-05 11:45:53 -07001278/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1279 * make a prepared TX frame (one that has been given to hw) to look like brand
1280 * new IEEE 802.11 frame that is ready to go through TX processing again.
Johannes Bergd0f09802008-07-29 11:32:07 +02001281 */
Jiri Bencf0706e82007-05-05 11:45:53 -07001282static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1283 struct ieee80211_key *key,
Johannes Berge039fa42008-05-15 12:55:29 +02001284 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07001285{
Harvey Harrison62bf1d72008-07-15 18:44:05 -07001286 unsigned int hdrlen, iv_len, mic_len;
1287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
Jiri Bencf0706e82007-05-05 11:45:53 -07001288
Harvey Harrison62bf1d72008-07-15 18:44:05 -07001289 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Jiri Bencf0706e82007-05-05 11:45:53 -07001290
1291 if (!key)
1292 goto no_key;
1293
Johannes Berg8f20fc22007-08-28 17:01:54 -04001294 switch (key->conf.alg) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001295 case ALG_WEP:
1296 iv_len = WEP_IV_LEN;
1297 mic_len = WEP_ICV_LEN;
1298 break;
1299 case ALG_TKIP:
1300 iv_len = TKIP_IV_LEN;
1301 mic_len = TKIP_ICV_LEN;
1302 break;
1303 case ALG_CCMP:
1304 iv_len = CCMP_HDR_LEN;
1305 mic_len = CCMP_MIC_LEN;
1306 break;
1307 default:
1308 goto no_key;
1309 }
1310
Harvey Harrison62bf1d72008-07-15 18:44:05 -07001311 if (skb->len >= hdrlen + mic_len &&
Johannes Berg11a843b2007-08-28 17:01:55 -04001312 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
Jiri Bencf0706e82007-05-05 11:45:53 -07001313 skb_trim(skb, skb->len - mic_len);
Harvey Harrison62bf1d72008-07-15 18:44:05 -07001314 if (skb->len >= hdrlen + iv_len) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001315 memmove(skb->data + iv_len, skb->data, hdrlen);
Harvey Harrison62bf1d72008-07-15 18:44:05 -07001316 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
Jiri Bencf0706e82007-05-05 11:45:53 -07001317 }
1318
1319no_key:
Harvey Harrison62bf1d72008-07-15 18:44:05 -07001320 if (ieee80211_is_data_qos(hdr->frame_control)) {
1321 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
1322 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
1323 hdrlen - IEEE80211_QOS_CTL_LEN);
1324 skb_pull(skb, IEEE80211_QOS_CTL_LEN);
Jiri Bencf0706e82007-05-05 11:45:53 -07001325 }
1326}
1327
Johannes Bergd46e1442008-02-20 23:59:33 +01001328static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1329 struct sta_info *sta,
Johannes Berge039fa42008-05-15 12:55:29 +02001330 struct sk_buff *skb)
Johannes Bergd46e1442008-02-20 23:59:33 +01001331{
Johannes Berge039fa42008-05-15 12:55:29 +02001332 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1333
Johannes Bergd46e1442008-02-20 23:59:33 +01001334 sta->tx_filtered_count++;
1335
1336 /*
1337 * Clear the TX filter mask for this STA when sending the next
1338 * packet. If the STA went to power save mode, this will happen
Yi Zhuf6d97102008-05-27 17:50:50 +03001339 * when it wakes up for the next time.
Johannes Bergd46e1442008-02-20 23:59:33 +01001340 */
Johannes Berg07346f812008-05-03 01:02:02 +02001341 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
Johannes Bergd46e1442008-02-20 23:59:33 +01001342
1343 /*
1344 * This code races in the following way:
1345 *
1346 * (1) STA sends frame indicating it will go to sleep and does so
1347 * (2) hardware/firmware adds STA to filter list, passes frame up
1348 * (3) hardware/firmware processes TX fifo and suppresses a frame
1349 * (4) we get TX status before having processed the frame and
1350 * knowing that the STA has gone to sleep.
1351 *
1352 * This is actually quite unlikely even when both those events are
1353 * processed from interrupts coming in quickly after one another or
1354 * even at the same time because we queue both TX status events and
1355 * RX frames to be processed by a tasklet and process them in the
1356 * same order that they were received or TX status last. Hence, there
1357 * is no race as long as the frame RX is processed before the next TX
1358 * status, which drivers can ensure, see below.
1359 *
1360 * Note that this can only happen if the hardware or firmware can
1361 * actually add STAs to the filter list, if this is done by the
1362 * driver in response to set_tim() (which will only reduce the race
1363 * this whole filtering tries to solve, not completely solve it)
1364 * this situation cannot happen.
1365 *
1366 * To completely solve this race drivers need to make sure that they
1367 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1368 * functions and
1369 * (b) always process RX events before TX status events if ordering
1370 * can be unknown, for example with different interrupt status
1371 * bits.
1372 */
Johannes Berg07346f812008-05-03 01:02:02 +02001373 if (test_sta_flags(sta, WLAN_STA_PS) &&
Johannes Bergd46e1442008-02-20 23:59:33 +01001374 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
Johannes Berge039fa42008-05-15 12:55:29 +02001375 ieee80211_remove_tx_extra(local, sta->key, skb);
Johannes Bergd46e1442008-02-20 23:59:33 +01001376 skb_queue_tail(&sta->tx_filtered, skb);
1377 return;
1378 }
1379
Johannes Berg07346f812008-05-03 01:02:02 +02001380 if (!test_sta_flags(sta, WLAN_STA_PS) &&
Johannes Berge039fa42008-05-15 12:55:29 +02001381 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
Johannes Bergd46e1442008-02-20 23:59:33 +01001382 /* Software retry the packet once */
Johannes Berge039fa42008-05-15 12:55:29 +02001383 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1384 ieee80211_remove_tx_extra(local, sta->key, skb);
Johannes Bergd46e1442008-02-20 23:59:33 +01001385 dev_queue_xmit(skb);
1386 return;
1387 }
1388
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001389#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergd46e1442008-02-20 23:59:33 +01001390 if (net_ratelimit())
1391 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1392 "queue_len=%d PS=%d @%lu\n",
1393 wiphy_name(local->hw.wiphy),
1394 skb_queue_len(&sta->tx_filtered),
Johannes Berg07346f812008-05-03 01:02:02 +02001395 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001396#endif
Johannes Bergd46e1442008-02-20 23:59:33 +01001397 dev_kfree_skb(skb);
1398}
1399
Johannes Berge039fa42008-05-15 12:55:29 +02001400void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07001401{
1402 struct sk_buff *skb2;
1403 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1404 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berge039fa42008-05-15 12:55:29 +02001405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -07001406 u16 frag, type;
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001407 __le16 fc;
Johannes Bergb306f452007-07-10 19:32:08 +02001408 struct ieee80211_tx_status_rtap_hdr *rthdr;
1409 struct ieee80211_sub_if_data *sdata;
Michael Wu3d30d942008-01-31 19:48:27 +01001410 struct net_device *prev_dev = NULL;
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001411 struct sta_info *sta;
Jiri Bencf0706e82007-05-05 11:45:53 -07001412
Johannes Bergd0709a62008-02-25 16:27:46 +01001413 rcu_read_lock();
1414
Johannes Berge039fa42008-05-15 12:55:29 +02001415 if (info->status.excessive_retries) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001416 sta = sta_info_get(local, hdr->addr1);
1417 if (sta) {
Johannes Berg07346f812008-05-03 01:02:02 +02001418 if (test_sta_flags(sta, WLAN_STA_PS)) {
Johannes Bergd46e1442008-02-20 23:59:33 +01001419 /*
1420 * The STA is in power save mode, so assume
Jiri Bencf0706e82007-05-05 11:45:53 -07001421 * that this TX packet failed because of that.
1422 */
Johannes Berge039fa42008-05-15 12:55:29 +02001423 ieee80211_handle_filtered_frame(local, sta, skb);
Johannes Bergd0709a62008-02-25 16:27:46 +01001424 rcu_read_unlock();
Johannes Bergd46e1442008-02-20 23:59:33 +01001425 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001426 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001427 }
1428 }
1429
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001430 fc = hdr->frame_control;
1431
1432 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1433 (ieee80211_is_data_qos(fc))) {
1434 u16 tid, ssn;
1435 u8 *qc;
1436 sta = sta_info_get(local, hdr->addr1);
1437 if (sta) {
1438 qc = ieee80211_get_qos_ctl(hdr);
1439 tid = qc[0] & 0xf;
1440 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1441 & IEEE80211_SCTL_SEQ);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001442 ieee80211_send_bar(sta->sdata, hdr->addr1,
Ron Rindjunsky429a3802008-07-01 14:16:03 +03001443 tid, ssn);
1444 }
1445 }
1446
Johannes Berge039fa42008-05-15 12:55:29 +02001447 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001448 sta = sta_info_get(local, hdr->addr1);
1449 if (sta) {
Johannes Berge039fa42008-05-15 12:55:29 +02001450 ieee80211_handle_filtered_frame(local, sta, skb);
Johannes Bergd0709a62008-02-25 16:27:46 +01001451 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07001452 return;
1453 }
Mattias Nissler1abbe492007-12-20 13:50:07 +01001454 } else
Johannes Berge039fa42008-05-15 12:55:29 +02001455 rate_control_tx_status(local->mdev, skb);
Jiri Bencf0706e82007-05-05 11:45:53 -07001456
Johannes Bergd0709a62008-02-25 16:27:46 +01001457 rcu_read_unlock();
1458
Jiri Bencf0706e82007-05-05 11:45:53 -07001459 ieee80211_led_tx(local, 0);
1460
1461 /* SNMP counters
1462 * Fragments are passed to low-level drivers as separate skbs, so these
1463 * are actually fragments, not frames. Update frame counters only for
1464 * the first fragment of the frame. */
1465
1466 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1467 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1468
Johannes Berge039fa42008-05-15 12:55:29 +02001469 if (info->flags & IEEE80211_TX_STAT_ACK) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001470 if (frag == 0) {
1471 local->dot11TransmittedFrameCount++;
1472 if (is_multicast_ether_addr(hdr->addr1))
1473 local->dot11MulticastTransmittedFrameCount++;
Johannes Berge039fa42008-05-15 12:55:29 +02001474 if (info->status.retry_count > 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001475 local->dot11RetryCount++;
Johannes Berge039fa42008-05-15 12:55:29 +02001476 if (info->status.retry_count > 1)
Jiri Bencf0706e82007-05-05 11:45:53 -07001477 local->dot11MultipleRetryCount++;
1478 }
1479
1480 /* This counter shall be incremented for an acknowledged MPDU
1481 * with an individual address in the address 1 field or an MPDU
1482 * with a multicast address in the address 1 field of type Data
1483 * or Management. */
1484 if (!is_multicast_ether_addr(hdr->addr1) ||
1485 type == IEEE80211_FTYPE_DATA ||
1486 type == IEEE80211_FTYPE_MGMT)
1487 local->dot11TransmittedFragmentCount++;
1488 } else {
1489 if (frag == 0)
1490 local->dot11FailedCount++;
1491 }
1492
Johannes Bergb306f452007-07-10 19:32:08 +02001493 /* this was a transmitted frame, but now we want to reuse it */
1494 skb_orphan(skb);
1495
Michael Wu3d30d942008-01-31 19:48:27 +01001496 /*
1497 * This is a bit racy but we can avoid a lot of work
1498 * with this test...
1499 */
1500 if (!local->monitors && !local->cooked_mntrs) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001501 dev_kfree_skb(skb);
1502 return;
1503 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001504
Johannes Bergb306f452007-07-10 19:32:08 +02001505 /* send frame to monitor interfaces now */
1506
1507 if (skb_headroom(skb) < sizeof(*rthdr)) {
1508 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1509 dev_kfree_skb(skb);
1510 return;
1511 }
1512
Johannes Berg988c0f72008-04-17 19:21:22 +02001513 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
Johannes Bergb306f452007-07-10 19:32:08 +02001514 skb_push(skb, sizeof(*rthdr));
1515
1516 memset(rthdr, 0, sizeof(*rthdr));
1517 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1518 rthdr->hdr.it_present =
1519 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1520 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1521
Johannes Berge039fa42008-05-15 12:55:29 +02001522 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
Johannes Bergb306f452007-07-10 19:32:08 +02001523 !is_multicast_ether_addr(hdr->addr1))
1524 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1525
Johannes Berge039fa42008-05-15 12:55:29 +02001526 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1527 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
Johannes Bergb306f452007-07-10 19:32:08 +02001528 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
Johannes Berge039fa42008-05-15 12:55:29 +02001529 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
Johannes Bergb306f452007-07-10 19:32:08 +02001530 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1531
Johannes Berge039fa42008-05-15 12:55:29 +02001532 rthdr->data_retries = info->status.retry_count;
Johannes Bergb306f452007-07-10 19:32:08 +02001533
Michael Wu3d30d942008-01-31 19:48:27 +01001534 /* XXX: is this sufficient for BPF? */
1535 skb_set_mac_header(skb, 0);
1536 skb->ip_summed = CHECKSUM_UNNECESSARY;
1537 skb->pkt_type = PACKET_OTHERHOST;
1538 skb->protocol = htons(ETH_P_802_2);
1539 memset(skb->cb, 0, sizeof(skb->cb));
Johannes Bergb306f452007-07-10 19:32:08 +02001540
Michael Wu3d30d942008-01-31 19:48:27 +01001541 rcu_read_lock();
1542 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +01001543 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
Johannes Bergb306f452007-07-10 19:32:08 +02001544 if (!netif_running(sdata->dev))
1545 continue;
Michael Wu3d30d942008-01-31 19:48:27 +01001546
1547 if (prev_dev) {
Johannes Berg79010422007-09-18 17:29:21 -04001548 skb2 = skb_clone(skb, GFP_ATOMIC);
Michael Wu3d30d942008-01-31 19:48:27 +01001549 if (skb2) {
1550 skb2->dev = prev_dev;
1551 netif_rx(skb2);
1552 }
1553 }
1554
1555 prev_dev = sdata->dev;
Johannes Bergb306f452007-07-10 19:32:08 +02001556 }
1557 }
Michael Wu3d30d942008-01-31 19:48:27 +01001558 if (prev_dev) {
1559 skb->dev = prev_dev;
1560 netif_rx(skb);
1561 skb = NULL;
1562 }
Johannes Berg79010422007-09-18 17:29:21 -04001563 rcu_read_unlock();
Michael Wu3d30d942008-01-31 19:48:27 +01001564 dev_kfree_skb(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -07001565}
1566EXPORT_SYMBOL(ieee80211_tx_status);
1567
Jiri Bencf0706e82007-05-05 11:45:53 -07001568struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1569 const struct ieee80211_ops *ops)
1570{
Jiri Bencf0706e82007-05-05 11:45:53 -07001571 struct ieee80211_local *local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001572 int priv_size;
1573 struct wiphy *wiphy;
1574
1575 /* Ensure 32-byte alignment of our private data and hw private data.
1576 * We use the wiphy priv data for both our ieee80211_local and for
1577 * the driver's private data
1578 *
1579 * In memory it'll be like this:
1580 *
1581 * +-------------------------+
1582 * | struct wiphy |
1583 * +-------------------------+
1584 * | struct ieee80211_local |
1585 * +-------------------------+
1586 * | driver's private data |
1587 * +-------------------------+
1588 *
1589 */
1590 priv_size = ((sizeof(struct ieee80211_local) +
1591 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1592 priv_data_len;
1593
1594 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1595
1596 if (!wiphy)
1597 return NULL;
1598
1599 wiphy->privid = mac80211_wiphy_privid;
1600
1601 local = wiphy_priv(wiphy);
1602 local->hw.wiphy = wiphy;
1603
1604 local->hw.priv = (char *)local +
1605 ((sizeof(struct ieee80211_local) +
1606 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1607
Johannes Berg4480f15c2007-07-10 19:32:10 +02001608 BUG_ON(!ops->tx);
Johannes Berg4150c572007-09-17 01:29:23 -04001609 BUG_ON(!ops->start);
1610 BUG_ON(!ops->stop);
Johannes Berg4480f15c2007-07-10 19:32:10 +02001611 BUG_ON(!ops->config);
1612 BUG_ON(!ops->add_interface);
Johannes Berg4150c572007-09-17 01:29:23 -04001613 BUG_ON(!ops->remove_interface);
1614 BUG_ON(!ops->configure_filter);
Jiri Bencf0706e82007-05-05 11:45:53 -07001615 local->ops = ops;
1616
Jiri Bencf0706e82007-05-05 11:45:53 -07001617 local->hw.queues = 1; /* default */
1618
Jiri Bencf0706e82007-05-05 11:45:53 -07001619 local->bridge_packets = 1;
1620
1621 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1622 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1623 local->short_retry_limit = 7;
1624 local->long_retry_limit = 4;
1625 local->hw.conf.radio_enabled = 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001626
Johannes Berg79010422007-09-18 17:29:21 -04001627 INIT_LIST_HEAD(&local->interfaces);
Jiri Bencf0706e82007-05-05 11:45:53 -07001628
Johannes Bergb16bd152008-04-11 21:40:35 +02001629 spin_lock_init(&local->key_lock);
1630
Jiri Bencf0706e82007-05-05 11:45:53 -07001631 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
Jiri Bencf0706e82007-05-05 11:45:53 -07001632
1633 sta_info_init(local);
1634
Jiri Bencf0706e82007-05-05 11:45:53 -07001635 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1636 (unsigned long)local);
1637 tasklet_disable(&local->tx_pending_tasklet);
1638
1639 tasklet_init(&local->tasklet,
1640 ieee80211_tasklet_handler,
1641 (unsigned long) local);
1642 tasklet_disable(&local->tasklet);
1643
1644 skb_queue_head_init(&local->skb_queue);
1645 skb_queue_head_init(&local->skb_queue_unreliable);
1646
1647 return local_to_hw(local);
1648}
1649EXPORT_SYMBOL(ieee80211_alloc_hw);
1650
1651int ieee80211_register_hw(struct ieee80211_hw *hw)
1652{
1653 struct ieee80211_local *local = hw_to_local(hw);
1654 const char *name;
1655 int result;
Johannes Berg8318d782008-01-24 19:38:38 +01001656 enum ieee80211_band band;
Johannes Berg96d51052008-02-08 09:48:13 +01001657 struct net_device *mdev;
Johannes Berg3e122be2008-07-09 14:40:34 +02001658 struct wireless_dev *mwdev;
Johannes Berg8318d782008-01-24 19:38:38 +01001659
1660 /*
1661 * generic code guarantees at least one band,
1662 * set this very early because much code assumes
1663 * that hw.conf.channel is assigned
1664 */
1665 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1666 struct ieee80211_supported_band *sband;
1667
1668 sband = local->hw.wiphy->bands[band];
1669 if (sband) {
1670 /* init channel we're on */
1671 local->hw.conf.channel =
1672 local->oper_channel =
1673 local->scan_channel = &sband->channels[0];
1674 break;
1675 }
1676 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001677
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -07001678 /* if low-level driver supports AP, we also support VLAN */
1679 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
1680 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
1681
1682 /* mac80211 always supports monitor */
1683 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
1684
Jiri Bencf0706e82007-05-05 11:45:53 -07001685 result = wiphy_register(local->hw.wiphy);
1686 if (result < 0)
1687 return result;
1688
Johannes Berge2530082008-05-17 00:57:14 +02001689 /*
1690 * We use the number of queues for feature tests (QoS, HT) internally
1691 * so restrict them appropriately.
1692 */
Johannes Berge2530082008-05-17 00:57:14 +02001693 if (hw->queues > IEEE80211_MAX_QUEUES)
1694 hw->queues = IEEE80211_MAX_QUEUES;
1695 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1696 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1697 if (hw->queues < 4)
1698 hw->ampdu_queues = 0;
Johannes Berge2530082008-05-17 00:57:14 +02001699
Johannes Berg3e122be2008-07-09 14:40:34 +02001700 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
Johannes Berge2530082008-05-17 00:57:14 +02001701 "wmaster%d", ether_setup,
1702 ieee80211_num_queues(hw));
Johannes Berg96d51052008-02-08 09:48:13 +01001703 if (!mdev)
1704 goto fail_mdev_alloc;
1705
Johannes Berg3e122be2008-07-09 14:40:34 +02001706 mwdev = netdev_priv(mdev);
1707 mdev->ieee80211_ptr = mwdev;
1708 mwdev->wiphy = local->hw.wiphy;
Johannes Berg96d51052008-02-08 09:48:13 +01001709
1710 local->mdev = mdev;
1711
Johannes Berg3e122be2008-07-09 14:40:34 +02001712 ieee80211_rx_bss_list_init(local);
Johannes Berg96d51052008-02-08 09:48:13 +01001713
1714 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1715 mdev->open = ieee80211_master_open;
1716 mdev->stop = ieee80211_master_stop;
1717 mdev->type = ARPHRD_IEEE80211;
1718 mdev->header_ops = &ieee80211_header_ops;
1719 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1720
Jiri Bencf0706e82007-05-05 11:45:53 -07001721 name = wiphy_dev(local->hw.wiphy)->driver->name;
Johannes Berg59959a62008-06-26 19:59:56 +02001722 local->hw.workqueue = create_freezeable_workqueue(name);
Jiri Bencf0706e82007-05-05 11:45:53 -07001723 if (!local->hw.workqueue) {
1724 result = -ENOMEM;
1725 goto fail_workqueue;
1726 }
1727
Johannes Bergb306f452007-07-10 19:32:08 +02001728 /*
1729 * The hardware needs headroom for sending the frame,
1730 * and we need some headroom for passing the frame to monitor
1731 * interfaces, but never both at the same time.
1732 */
Jiri Benc33ccad32007-07-18 17:10:44 +02001733 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1734 sizeof(struct ieee80211_tx_status_rtap_hdr));
Johannes Bergb306f452007-07-10 19:32:08 +02001735
Jiri Bence9f207f2007-05-05 11:46:38 -07001736 debugfs_hw_add(local);
1737
Tomas Winklerdc0ae302008-06-12 22:38:37 +03001738 if (local->hw.conf.beacon_int < 10)
1739 local->hw.conf.beacon_int = 100;
Jiri Bencf0706e82007-05-05 11:45:53 -07001740
Tomas Winklerea95bba2008-07-18 13:53:00 +08001741 if (local->hw.max_listen_interval == 0)
1742 local->hw.max_listen_interval = 1;
1743
1744 local->hw.conf.listen_interval = local->hw.max_listen_interval;
1745
Bruno Randolf566bfe52008-05-08 19:15:40 +02001746 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1747 IEEE80211_HW_SIGNAL_DB |
1748 IEEE80211_HW_SIGNAL_DBM) ?
Jiri Bencf0706e82007-05-05 11:45:53 -07001749 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
Bruno Randolf566bfe52008-05-08 19:15:40 +02001750 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
Jiri Bencf0706e82007-05-05 11:45:53 -07001751 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
Bruno Randolf566bfe52008-05-08 19:15:40 +02001752 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
Jiri Bencf0706e82007-05-05 11:45:53 -07001753 local->wstats_flags |= IW_QUAL_DBM;
1754
1755 result = sta_info_start(local);
1756 if (result < 0)
1757 goto fail_sta_info;
1758
1759 rtnl_lock();
1760 result = dev_alloc_name(local->mdev, local->mdev->name);
1761 if (result < 0)
1762 goto fail_dev;
1763
1764 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1765 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1766
1767 result = register_netdevice(local->mdev);
1768 if (result < 0)
1769 goto fail_dev;
1770
Johannes Berg830f9032007-10-28 14:51:05 +01001771 result = ieee80211_init_rate_ctrl_alg(local,
1772 hw->rate_control_algorithm);
Jiri Bencf0706e82007-05-05 11:45:53 -07001773 if (result < 0) {
1774 printk(KERN_DEBUG "%s: Failed to initialize rate control "
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001775 "algorithm\n", wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001776 goto fail_rate;
1777 }
1778
1779 result = ieee80211_wep_init(local);
1780
1781 if (result < 0) {
Jeremy Fitzhardinge023a04b2008-07-14 12:52:08 -07001782 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
1783 wiphy_name(local->hw.wiphy), result);
Jiri Bencf0706e82007-05-05 11:45:53 -07001784 goto fail_wep;
1785 }
1786
David S. Miller51cb6db2008-07-15 03:34:57 -07001787 local->mdev->select_queue = ieee80211_select_queue;
Jiri Bencf0706e82007-05-05 11:45:53 -07001788
1789 /* add one default STA interface */
Johannes Berg3e122be2008-07-09 14:40:34 +02001790 result = ieee80211_if_add(local, "wlan%d", NULL,
Luis Carlos Coboee385852008-02-23 15:17:11 +01001791 IEEE80211_IF_TYPE_STA, NULL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001792 if (result)
1793 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001794 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001795
Jiri Bencf0706e82007-05-05 11:45:53 -07001796 rtnl_unlock();
1797
1798 ieee80211_led_init(local);
1799
1800 return 0;
1801
1802fail_wep:
1803 rate_control_deinitialize(local);
1804fail_rate:
1805 unregister_netdevice(local->mdev);
Pavel Emelyanov339a7c42008-05-04 17:59:30 -07001806 local->mdev = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001807fail_dev:
1808 rtnl_unlock();
1809 sta_info_stop(local);
1810fail_sta_info:
Jiri Bence9f207f2007-05-05 11:46:38 -07001811 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -07001812 destroy_workqueue(local->hw.workqueue);
1813fail_workqueue:
Johannes Berg3e122be2008-07-09 14:40:34 +02001814 if (local->mdev)
1815 free_netdev(local->mdev);
Johannes Berg96d51052008-02-08 09:48:13 +01001816fail_mdev_alloc:
Jiri Bencf0706e82007-05-05 11:45:53 -07001817 wiphy_unregister(local->hw.wiphy);
1818 return result;
1819}
1820EXPORT_SYMBOL(ieee80211_register_hw);
1821
Jiri Bencf0706e82007-05-05 11:45:53 -07001822void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1823{
1824 struct ieee80211_local *local = hw_to_local(hw);
Jiri Bencf0706e82007-05-05 11:45:53 -07001825
1826 tasklet_kill(&local->tx_pending_tasklet);
1827 tasklet_kill(&local->tasklet);
1828
1829 rtnl_lock();
1830
Johannes Berg79010422007-09-18 17:29:21 -04001831 /*
1832 * At this point, interface list manipulations are fine
1833 * because the driver cannot be handing us frames any
1834 * more and the tasklet is killed.
1835 */
Johannes Berg5b2812e2007-09-26 14:27:23 +02001836
Johannes Berg75636522008-07-09 14:40:35 +02001837 /* First, we remove all virtual interfaces. */
1838 ieee80211_remove_interfaces(local);
Johannes Berg5b2812e2007-09-26 14:27:23 +02001839
1840 /* then, finally, remove the master interface */
Johannes Berg3e122be2008-07-09 14:40:34 +02001841 unregister_netdevice(local->mdev);
Jiri Bencf0706e82007-05-05 11:45:53 -07001842
1843 rtnl_unlock();
1844
Johannes Berg3e122be2008-07-09 14:40:34 +02001845 ieee80211_rx_bss_list_deinit(local);
Jiri Bencf0706e82007-05-05 11:45:53 -07001846 ieee80211_clear_tx_pending(local);
1847 sta_info_stop(local);
1848 rate_control_deinitialize(local);
Jiri Bence9f207f2007-05-05 11:46:38 -07001849 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -07001850
Jiri Bencf0706e82007-05-05 11:45:53 -07001851 if (skb_queue_len(&local->skb_queue)
1852 || skb_queue_len(&local->skb_queue_unreliable))
1853 printk(KERN_WARNING "%s: skb_queue not empty\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001854 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001855 skb_queue_purge(&local->skb_queue);
1856 skb_queue_purge(&local->skb_queue_unreliable);
1857
1858 destroy_workqueue(local->hw.workqueue);
1859 wiphy_unregister(local->hw.wiphy);
1860 ieee80211_wep_free(local);
1861 ieee80211_led_exit(local);
Johannes Berg3e122be2008-07-09 14:40:34 +02001862 free_netdev(local->mdev);
Jiri Bencf0706e82007-05-05 11:45:53 -07001863}
1864EXPORT_SYMBOL(ieee80211_unregister_hw);
1865
1866void ieee80211_free_hw(struct ieee80211_hw *hw)
1867{
1868 struct ieee80211_local *local = hw_to_local(hw);
1869
Jiri Bencf0706e82007-05-05 11:45:53 -07001870 wiphy_free(local->hw.wiphy);
1871}
1872EXPORT_SYMBOL(ieee80211_free_hw);
1873
Jiri Bencf0706e82007-05-05 11:45:53 -07001874static int __init ieee80211_init(void)
1875{
1876 struct sk_buff *skb;
1877 int ret;
1878
Johannes Berge039fa42008-05-15 12:55:29 +02001879 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1880 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1881 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
Jiri Bencf0706e82007-05-05 11:45:53 -07001882
Johannes Berg4b475892008-01-02 15:17:03 +01001883 ret = rc80211_pid_init();
Mattias Nisslerad018372007-12-19 01:25:57 +01001884 if (ret)
David S. Miller51cb6db2008-07-15 03:34:57 -07001885 return ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07001886
Jiri Bence9f207f2007-05-05 11:46:38 -07001887 ieee80211_debugfs_netdev_init();
1888
Jiri Bencf0706e82007-05-05 11:45:53 -07001889 return 0;
1890}
1891
Jiri Bencf0706e82007-05-05 11:45:53 -07001892static void __exit ieee80211_exit(void)
1893{
Johannes Berg4b475892008-01-02 15:17:03 +01001894 rc80211_pid_exit();
Johannes Bergac71c692007-10-28 14:17:44 +01001895
Johannes Berg3b967662008-04-08 17:56:52 +02001896 /*
1897 * For key todo, it'll be empty by now but the work
1898 * might still be scheduled.
1899 */
1900 flush_scheduled_work();
1901
Luis Carlos Cobof7a92142008-02-23 15:17:18 +01001902 if (mesh_allocated)
1903 ieee80211s_stop();
Johannes Berg902acc72008-02-23 15:17:19 +01001904
Jiri Bence9f207f2007-05-05 11:46:38 -07001905 ieee80211_debugfs_netdev_exit();
Jiri Bencf0706e82007-05-05 11:45:53 -07001906}
1907
1908
Johannes Bergca9938f2007-09-11 12:50:32 +02001909subsys_initcall(ieee80211_init);
Jiri Bencf0706e82007-05-05 11:45:53 -07001910module_exit(ieee80211_exit);
1911
1912MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1913MODULE_LICENSE("GPL");