Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
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> | |
f0706e82 | 23 | #include <linux/bitmap.h> |
881d966b | 24 | #include <net/net_namespace.h> |
f0706e82 JB |
25 | #include <net/cfg80211.h> |
26 | ||
f0706e82 | 27 | #include "ieee80211_i.h" |
2c8dccc7 | 28 | #include "rate.h" |
f7a92144 | 29 | #include "mesh.h" |
f0706e82 | 30 | #include "wep.h" |
f0706e82 JB |
31 | #include "wme.h" |
32 | #include "aes_ccm.h" | |
2c8dccc7 | 33 | #include "led.h" |
e0eb6859 | 34 | #include "cfg.h" |
e9f207f0 JB |
35 | #include "debugfs.h" |
36 | #include "debugfs_netdev.h" | |
f0706e82 | 37 | |
b306f453 JB |
38 | /* |
39 | * For seeing transmitted packets on monitor interfaces | |
40 | * we have a radiotap header too. | |
41 | */ | |
42 | struct ieee80211_tx_status_rtap_hdr { | |
43 | struct ieee80211_radiotap_header hdr; | |
44 | __le16 tx_flags; | |
45 | u8 data_retries; | |
46 | } __attribute__ ((packed)); | |
47 | ||
b2c258fb | 48 | /* common interface routines */ |
b306f453 | 49 | |
b95cce35 | 50 | static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr) |
b2c258fb JB |
51 | { |
52 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
53 | return ETH_ALEN; | |
54 | } | |
f0706e82 | 55 | |
4150c572 JB |
56 | /* must be called under mdev tx lock */ |
57 | static void ieee80211_configure_filter(struct ieee80211_local *local) | |
58 | { | |
59 | unsigned int changed_flags; | |
60 | unsigned int new_flags = 0; | |
61 | ||
53918994 | 62 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
63 | new_flags |= FIF_PROMISC_IN_BSS; |
64 | ||
53918994 | 65 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
66 | new_flags |= FIF_ALLMULTI; |
67 | ||
68 | if (local->monitors) | |
8cc9a739 MW |
69 | 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; | |
4150c572 JB |
82 | |
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 | ||
b2c258fb | 98 | /* master interface */ |
f0706e82 | 99 | |
b2c258fb JB |
100 | static 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; | |
f0706e82 | 105 | |
79010420 JB |
106 | /* we hold the RTNL here so can safely walk the list */ |
107 | list_for_each_entry(sdata, &local->interfaces, list) { | |
3e122be0 | 108 | if (netif_running(sdata->dev)) { |
b2c258fb JB |
109 | res = 0; |
110 | break; | |
111 | } | |
112 | } | |
36d6825b JB |
113 | |
114 | if (res) | |
115 | return res; | |
116 | ||
117 | netif_start_queue(local->mdev); | |
118 | ||
119 | return 0; | |
b2c258fb | 120 | } |
f0706e82 | 121 | |
b2c258fb | 122 | static int ieee80211_master_stop(struct net_device *dev) |
f0706e82 | 123 | { |
b2c258fb JB |
124 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
125 | struct ieee80211_sub_if_data *sdata; | |
f0706e82 | 126 | |
79010420 JB |
127 | /* we hold the RTNL here so can safely walk the list */ |
128 | list_for_each_entry(sdata, &local->interfaces, list) | |
3e122be0 | 129 | if (netif_running(sdata->dev)) |
b2c258fb | 130 | dev_close(sdata->dev); |
f0706e82 | 131 | |
b2c258fb JB |
132 | return 0; |
133 | } | |
f0706e82 | 134 | |
4150c572 JB |
135 | static 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 | ||
b2c258fb | 142 | /* regular interfaces */ |
f0706e82 | 143 | |
b2c258fb | 144 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
f0706e82 | 145 | { |
f7a92144 LCC |
146 | 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 | ||
b2c258fb JB |
151 | /* FIX: what would be proper limits for MTU? |
152 | * This interface uses 802.3 frames. */ | |
f7a92144 | 153 | if (new_mtu < 256 || |
f4ea83dd | 154 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { |
b2c258fb JB |
155 | return -EINVAL; |
156 | } | |
f0706e82 | 157 | |
b2c258fb JB |
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; | |
f0706e82 JB |
162 | return 0; |
163 | } | |
164 | ||
b2c258fb JB |
165 | static 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 | } | |
f0706e82 | 180 | |
b2c258fb | 181 | static int ieee80211_open(struct net_device *dev) |
e2ebc74d | 182 | { |
b2c258fb JB |
183 | struct ieee80211_sub_if_data *sdata, *nsdata; |
184 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
fc32f924 | 185 | struct sta_info *sta; |
b2c258fb | 186 | struct ieee80211_if_init_conf conf; |
fc32f924 | 187 | u32 changed = 0; |
b2c258fb | 188 | int res; |
ceffefd1 | 189 | bool need_hw_reconfig = 0; |
f0706e82 | 190 | |
b2c258fb | 191 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0ec3ca44 | 192 | |
79010420 JB |
193 | /* we hold the RTNL here so can safely walk the list */ |
194 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
b2c258fb | 195 | struct net_device *ndev = nsdata->dev; |
e2ebc74d | 196 | |
3e122be0 | 197 | if (ndev != dev && netif_running(ndev)) { |
665e8aaf JB |
198 | /* |
199 | * Allow only a single IBSS interface to be up at any | |
200 | * time. This is restricted because beacon distribution | |
201 | * cannot work properly if both are in the same IBSS. | |
202 | * | |
203 | * To remove this restriction we'd have to disallow them | |
204 | * from setting the same SSID on different IBSS interfaces | |
205 | * belonging to the same hardware. Then, however, we're | |
206 | * faced with having to adopt two different TSF timers... | |
207 | */ | |
208 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && | |
209 | nsdata->vif.type == IEEE80211_IF_TYPE_IBSS) | |
210 | return -EBUSY; | |
211 | ||
665e8aaf JB |
212 | /* |
213 | * The remaining checks are only performed for interfaces | |
214 | * with the same MAC address. | |
215 | */ | |
216 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
217 | continue; | |
218 | ||
0ec3ca44 JB |
219 | /* |
220 | * check whether it may have the same address | |
221 | */ | |
51fb61e7 JB |
222 | if (!identical_mac_addr_allowed(sdata->vif.type, |
223 | nsdata->vif.type)) | |
0ec3ca44 | 224 | return -ENOTUNIQ; |
0ec3ca44 JB |
225 | |
226 | /* | |
227 | * can only add VLANs to enabled APs | |
228 | */ | |
51fb61e7 | 229 | if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN && |
665e8aaf | 230 | nsdata->vif.type == IEEE80211_IF_TYPE_AP) |
3e122be0 | 231 | sdata->bss = &nsdata->u.ap; |
b2c258fb JB |
232 | } |
233 | } | |
f0706e82 | 234 | |
51fb61e7 | 235 | switch (sdata->vif.type) { |
0ec3ca44 | 236 | case IEEE80211_IF_TYPE_WDS: |
e94e1068 | 237 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) |
0ec3ca44 JB |
238 | return -ENOLINK; |
239 | break; | |
240 | case IEEE80211_IF_TYPE_VLAN: | |
3e122be0 | 241 | if (!sdata->bss) |
0ec3ca44 | 242 | return -ENOLINK; |
3e122be0 | 243 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); |
0ec3ca44 | 244 | break; |
fb1c1cd6 | 245 | case IEEE80211_IF_TYPE_AP: |
3e122be0 JB |
246 | sdata->bss = &sdata->u.ap; |
247 | break; | |
fb1c1cd6 JB |
248 | case IEEE80211_IF_TYPE_STA: |
249 | case IEEE80211_IF_TYPE_MNTR: | |
250 | case IEEE80211_IF_TYPE_IBSS: | |
6032f934 | 251 | case IEEE80211_IF_TYPE_MESH_POINT: |
fb1c1cd6 JB |
252 | /* no special treatment */ |
253 | break; | |
a2897552 JB |
254 | case IEEE80211_IF_TYPE_INVALID: |
255 | /* cannot happen */ | |
256 | WARN_ON(1); | |
257 | break; | |
0ec3ca44 | 258 | } |
f0706e82 | 259 | |
b2c258fb JB |
260 | if (local->open_count == 0) { |
261 | res = 0; | |
4150c572 JB |
262 | if (local->ops->start) |
263 | res = local->ops->start(local_to_hw(local)); | |
264 | if (res) | |
3e122be0 | 265 | goto err_del_bss; |
ceffefd1 | 266 | need_hw_reconfig = 1; |
cdcb006f | 267 | ieee80211_led_radio(local, local->hw.conf.radio_enabled); |
b2c258fb | 268 | } |
f0706e82 | 269 | |
51fb61e7 | 270 | switch (sdata->vif.type) { |
0ec3ca44 | 271 | case IEEE80211_IF_TYPE_VLAN: |
0ec3ca44 JB |
272 | /* no need to tell driver */ |
273 | break; | |
4150c572 | 274 | case IEEE80211_IF_TYPE_MNTR: |
3d30d949 MW |
275 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
276 | local->cooked_mntrs++; | |
277 | break; | |
278 | } | |
279 | ||
4150c572 | 280 | /* must be before the call to ieee80211_configure_filter */ |
b2c258fb | 281 | local->monitors++; |
8cc9a739 | 282 | if (local->monitors == 1) |
4150c572 | 283 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
8cc9a739 MW |
284 | |
285 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
286 | local->fif_fcsfail++; | |
287 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
288 | local->fif_plcpfail++; | |
289 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
290 | local->fif_control++; | |
291 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
292 | local->fif_other_bss++; | |
293 | ||
b9e40857 | 294 | netif_addr_lock_bh(local->mdev); |
8cc9a739 | 295 | ieee80211_configure_filter(local); |
b9e40857 | 296 | netif_addr_unlock_bh(local->mdev); |
4150c572 JB |
297 | break; |
298 | case IEEE80211_IF_TYPE_STA: | |
299 | case IEEE80211_IF_TYPE_IBSS: | |
300 | sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
301 | /* fall through */ | |
302 | default: | |
32bfd35d | 303 | conf.vif = &sdata->vif; |
51fb61e7 | 304 | conf.type = sdata->vif.type; |
4150c572 JB |
305 | conf.mac_addr = dev->dev_addr; |
306 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
4150c572 | 307 | if (res) |
636c5d48 | 308 | goto err_stop; |
4150c572 | 309 | |
9d139c81 JB |
310 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
311 | ieee80211_start_mesh(sdata->dev); | |
fc32f924 TW |
312 | changed |= ieee80211_reset_erp_info(dev); |
313 | ieee80211_bss_info_change_notify(sdata, changed); | |
11a843b7 | 314 | ieee80211_enable_keys(sdata); |
4150c572 | 315 | |
51fb61e7 | 316 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
ddd3d2be | 317 | !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) |
4150c572 JB |
318 | netif_carrier_off(dev); |
319 | else | |
320 | netif_carrier_on(dev); | |
d9430a32 | 321 | } |
f0706e82 | 322 | |
636c5d48 JB |
323 | if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) { |
324 | /* Create STA entry for the WDS peer */ | |
325 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
326 | GFP_KERNEL); | |
327 | if (!sta) { | |
328 | res = -ENOMEM; | |
329 | goto err_del_interface; | |
330 | } | |
331 | ||
07346f81 | 332 | /* no locking required since STA is not live yet */ |
636c5d48 JB |
333 | sta->flags |= WLAN_STA_AUTHORIZED; |
334 | ||
335 | res = sta_info_insert(sta); | |
336 | if (res) { | |
337 | /* STA has been freed */ | |
338 | goto err_del_interface; | |
339 | } | |
340 | } | |
341 | ||
4150c572 JB |
342 | if (local->open_count == 0) { |
343 | res = dev_open(local->mdev); | |
344 | WARN_ON(res); | |
636c5d48 JB |
345 | if (res) |
346 | goto err_del_interface; | |
4150c572 JB |
347 | tasklet_enable(&local->tx_pending_tasklet); |
348 | tasklet_enable(&local->tasklet); | |
349 | } | |
350 | ||
c1428b3f JB |
351 | /* |
352 | * set_multicast_list will be invoked by the networking core | |
353 | * which will check whether any increments here were done in | |
354 | * error and sync them down to the hardware as filter flags. | |
355 | */ | |
356 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
357 | atomic_inc(&local->iff_allmultis); | |
358 | ||
359 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
360 | atomic_inc(&local->iff_promiscs); | |
361 | ||
4150c572 | 362 | local->open_count++; |
ceffefd1 MB |
363 | if (need_hw_reconfig) |
364 | ieee80211_hw_config(local); | |
f0706e82 | 365 | |
64f851e4 JN |
366 | /* |
367 | * ieee80211_sta_work is disabled while network interface | |
368 | * is down. Therefore, some configuration changes may not | |
369 | * yet be effective. Trigger execution of ieee80211_sta_work | |
370 | * to fix this. | |
371 | */ | |
988c0f72 JB |
372 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || |
373 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { | |
64f851e4 JN |
374 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
375 | queue_work(local->hw.workqueue, &ifsta->work); | |
376 | } | |
377 | ||
b2c258fb | 378 | netif_start_queue(dev); |
4150c572 | 379 | |
b2c258fb | 380 | return 0; |
636c5d48 JB |
381 | err_del_interface: |
382 | local->ops->remove_interface(local_to_hw(local), &conf); | |
383 | err_stop: | |
384 | if (!local->open_count && local->ops->stop) | |
385 | local->ops->stop(local_to_hw(local)); | |
3e122be0 JB |
386 | err_del_bss: |
387 | sdata->bss = NULL; | |
388 | if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN) | |
389 | list_del(&sdata->u.vlan.list); | |
636c5d48 | 390 | return res; |
f0706e82 | 391 | } |
f0706e82 | 392 | |
4150c572 | 393 | static int ieee80211_stop(struct net_device *dev) |
f0706e82 | 394 | { |
44213b5e JB |
395 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
396 | struct ieee80211_local *local = sdata->local; | |
4150c572 | 397 | struct ieee80211_if_init_conf conf; |
07db2183 | 398 | struct sta_info *sta; |
4150c572 | 399 | |
44213b5e JB |
400 | /* |
401 | * Stop TX on this interface first. | |
402 | */ | |
403 | netif_stop_queue(dev); | |
4150c572 | 404 | |
44213b5e JB |
405 | /* |
406 | * Now delete all active aggregation sessions. | |
407 | */ | |
d0709a65 JB |
408 | rcu_read_lock(); |
409 | ||
410 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
411 | if (sta->sdata == sdata) | |
85249e5f | 412 | ieee80211_sta_tear_down_BA_sessions(dev, sta->addr); |
07db2183 RR |
413 | } |
414 | ||
d0709a65 JB |
415 | rcu_read_unlock(); |
416 | ||
44213b5e JB |
417 | /* |
418 | * Remove all stations associated with this interface. | |
419 | * | |
420 | * This must be done before calling ops->remove_interface() | |
421 | * because otherwise we can later invoke ops->sta_notify() | |
422 | * whenever the STAs are removed, and that invalidates driver | |
423 | * assumptions about always getting a vif pointer that is valid | |
424 | * (because if we remove a STA after ops->remove_interface() | |
425 | * the driver will have removed the vif info already!) | |
426 | * | |
427 | * We could relax this and only unlink the stations from the | |
428 | * hash table and list but keep them on a per-sdata list that | |
429 | * will be inserted back again when the interface is brought | |
430 | * up again, but I don't currently see a use case for that, | |
431 | * except with WDS which gets a STA entry created when it is | |
432 | * brought up. | |
433 | */ | |
434 | sta_info_flush(local, sdata); | |
4150c572 | 435 | |
c1428b3f JB |
436 | /* |
437 | * Don't count this interface for promisc/allmulti while it | |
438 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
439 | * on the master interface which will sync these down to the | |
440 | * hardware as filter flags. | |
441 | */ | |
442 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
443 | atomic_dec(&local->iff_allmultis); | |
444 | ||
445 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
446 | atomic_dec(&local->iff_promiscs); | |
447 | ||
4150c572 JB |
448 | dev_mc_unsync(local->mdev, dev); |
449 | ||
5dfdaf58 | 450 | /* APs need special treatment */ |
51fb61e7 | 451 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { |
0ec3ca44 | 452 | struct ieee80211_sub_if_data *vlan, *tmp; |
5dfdaf58 | 453 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
0ec3ca44 | 454 | |
5dfdaf58 JB |
455 | /* remove beacon */ |
456 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
457 | synchronize_rcu(); | |
458 | kfree(old_beacon); | |
459 | ||
460 | /* down all dependent devices, that is VLANs */ | |
0ec3ca44 JB |
461 | list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, |
462 | u.vlan.list) | |
463 | dev_close(vlan->dev); | |
464 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
465 | } | |
466 | ||
4150c572 | 467 | local->open_count--; |
f0706e82 | 468 | |
51fb61e7 | 469 | switch (sdata->vif.type) { |
0ec3ca44 JB |
470 | case IEEE80211_IF_TYPE_VLAN: |
471 | list_del(&sdata->u.vlan.list); | |
0ec3ca44 JB |
472 | /* no need to tell driver */ |
473 | break; | |
4150c572 | 474 | case IEEE80211_IF_TYPE_MNTR: |
3d30d949 MW |
475 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
476 | local->cooked_mntrs--; | |
477 | break; | |
478 | } | |
479 | ||
4150c572 | 480 | local->monitors--; |
8cc9a739 | 481 | if (local->monitors == 0) |
8b393f1d | 482 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
8cc9a739 MW |
483 | |
484 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
485 | local->fif_fcsfail--; | |
486 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
487 | local->fif_plcpfail--; | |
488 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
489 | local->fif_control--; | |
490 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
491 | local->fif_other_bss--; | |
492 | ||
b9e40857 | 493 | netif_addr_lock_bh(local->mdev); |
8cc9a739 | 494 | ieee80211_configure_filter(local); |
b9e40857 | 495 | netif_addr_unlock_bh(local->mdev); |
4150c572 | 496 | break; |
f7a92144 | 497 | case IEEE80211_IF_TYPE_MESH_POINT: |
b2c258fb JB |
498 | case IEEE80211_IF_TYPE_STA: |
499 | case IEEE80211_IF_TYPE_IBSS: | |
500 | sdata->u.sta.state = IEEE80211_DISABLED; | |
ad81b2f9 | 501 | memset(sdata->u.sta.bssid, 0, ETH_ALEN); |
b2c258fb | 502 | del_timer_sync(&sdata->u.sta.timer); |
2a8a9a88 | 503 | /* |
79010420 JB |
504 | * When we get here, the interface is marked down. |
505 | * Call synchronize_rcu() to wait for the RX path | |
506 | * should it be using the interface and enqueuing | |
507 | * frames at this very time on another CPU. | |
2a8a9a88 | 508 | */ |
79010420 | 509 | synchronize_rcu(); |
b2c258fb | 510 | skb_queue_purge(&sdata->u.sta.skb_queue); |
2a8a9a88 | 511 | |
ece8eddd ZY |
512 | if (local->scan_dev == sdata->dev) { |
513 | if (!local->ops->hw_scan) { | |
514 | local->sta_sw_scanning = 0; | |
515 | cancel_delayed_work(&local->scan_work); | |
516 | } else | |
517 | local->sta_hw_scanning = 0; | |
b2c258fb | 518 | } |
ece8eddd | 519 | |
a10605e5 ZY |
520 | sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED; |
521 | kfree(sdata->u.sta.extra_ie); | |
522 | sdata->u.sta.extra_ie = NULL; | |
523 | sdata->u.sta.extra_ie_len = 0; | |
4150c572 JB |
524 | /* fall through */ |
525 | default: | |
32bfd35d | 526 | conf.vif = &sdata->vif; |
51fb61e7 | 527 | conf.type = sdata->vif.type; |
4150c572 | 528 | conf.mac_addr = dev->dev_addr; |
11a843b7 JB |
529 | /* disable all keys for as long as this netdev is down */ |
530 | ieee80211_disable_keys(sdata); | |
4150c572 | 531 | local->ops->remove_interface(local_to_hw(local), &conf); |
f0706e82 JB |
532 | } |
533 | ||
3e122be0 JB |
534 | sdata->bss = NULL; |
535 | ||
b2c258fb JB |
536 | if (local->open_count == 0) { |
537 | if (netif_running(local->mdev)) | |
538 | dev_close(local->mdev); | |
4150c572 | 539 | |
b2c258fb JB |
540 | if (local->ops->stop) |
541 | local->ops->stop(local_to_hw(local)); | |
4150c572 | 542 | |
cdcb006f ID |
543 | ieee80211_led_radio(local, 0); |
544 | ||
ea0c9253 ID |
545 | flush_workqueue(local->hw.workqueue); |
546 | ||
b2c258fb JB |
547 | tasklet_disable(&local->tx_pending_tasklet); |
548 | tasklet_disable(&local->tasklet); | |
549 | } | |
b2c258fb | 550 | |
f0706e82 JB |
551 | return 0; |
552 | } | |
553 | ||
eadc8d9e RR |
554 | int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) |
555 | { | |
556 | struct ieee80211_local *local = hw_to_local(hw); | |
c2aa2885 | 557 | struct netdev_queue *txq; |
eadc8d9e RR |
558 | struct sta_info *sta; |
559 | struct ieee80211_sub_if_data *sdata; | |
560 | u16 start_seq_num = 0; | |
561 | u8 *state; | |
562 | int ret; | |
563 | DECLARE_MAC_BUF(mac); | |
564 | ||
565 | if (tid >= STA_TID_NUM) | |
566 | return -EINVAL; | |
567 | ||
568 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
569 | printk(KERN_DEBUG "Open BA session requested for %s tid %u\n", | |
570 | print_mac(mac, ra), tid); | |
571 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
572 | ||
d0709a65 JB |
573 | rcu_read_lock(); |
574 | ||
eadc8d9e RR |
575 | sta = sta_info_get(local, ra); |
576 | if (!sta) { | |
f4ea83dd | 577 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 578 | printk(KERN_DEBUG "Could not find the station\n"); |
f4ea83dd | 579 | #endif |
b83f4e15 TW |
580 | ret = -ENOENT; |
581 | goto exit; | |
eadc8d9e RR |
582 | } |
583 | ||
07346f81 | 584 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
585 | |
586 | /* we have tried too many times, receiver does not want A-MPDU */ | |
cee24a3e | 587 | if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { |
eadc8d9e | 588 | ret = -EBUSY; |
b83f4e15 | 589 | goto err_unlock_sta; |
eadc8d9e RR |
590 | } |
591 | ||
cee24a3e | 592 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e RR |
593 | /* check if the TID is not in aggregation flow already */ |
594 | if (*state != HT_AGG_STATE_IDLE) { | |
595 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
596 | printk(KERN_DEBUG "BA request denied - session is not " | |
597 | "idle on tid %u\n", tid); | |
598 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
599 | ret = -EAGAIN; | |
b83f4e15 | 600 | goto err_unlock_sta; |
eadc8d9e RR |
601 | } |
602 | ||
cee24a3e RR |
603 | /* prepare A-MPDU MLME for Tx aggregation */ |
604 | sta->ampdu_mlme.tid_tx[tid] = | |
605 | kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); | |
606 | if (!sta->ampdu_mlme.tid_tx[tid]) { | |
f4ea83dd | 607 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
608 | if (net_ratelimit()) |
609 | printk(KERN_ERR "allocate tx mlme to tid %d failed\n", | |
610 | tid); | |
f4ea83dd | 611 | #endif |
cee24a3e | 612 | ret = -ENOMEM; |
b83f4e15 | 613 | goto err_unlock_sta; |
cee24a3e RR |
614 | } |
615 | /* Tx timer */ | |
616 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function = | |
617 | sta_addba_resp_timer_expired; | |
618 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data = | |
619 | (unsigned long)&sta->timer_to_tid[tid]; | |
620 | init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); | |
621 | ||
eadc8d9e RR |
622 | /* ensure that TX flow won't interrupt us |
623 | * until the end of the call to requeue function */ | |
e8a0464c | 624 | txq = netdev_get_tx_queue(local->mdev, 0); |
c2aa2885 | 625 | spin_lock_bh(&txq->lock); |
eadc8d9e RR |
626 | |
627 | /* create a new queue for this aggregation */ | |
9e723492 | 628 | ret = ieee80211_ht_agg_queue_add(local, sta, tid); |
eadc8d9e RR |
629 | |
630 | /* case no queue is available to aggregation | |
631 | * don't switch to aggregation */ | |
632 | if (ret) { | |
633 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
cee24a3e | 634 | printk(KERN_DEBUG "BA request denied - queue unavailable for" |
eadc8d9e RR |
635 | " tid %d\n", tid); |
636 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
b83f4e15 | 637 | goto err_unlock_queue; |
eadc8d9e | 638 | } |
d0709a65 | 639 | sdata = sta->sdata; |
eadc8d9e RR |
640 | |
641 | /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the | |
642 | * call back right away, it must see that the flow has begun */ | |
643 | *state |= HT_ADDBA_REQUESTED_MSK; | |
644 | ||
645 | if (local->ops->ampdu_action) | |
646 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START, | |
647 | ra, tid, &start_seq_num); | |
648 | ||
649 | if (ret) { | |
650 | /* No need to requeue the packets in the agg queue, since we | |
651 | * held the tx lock: no packet could be enqueued to the newly | |
652 | * allocated queue */ | |
9e723492 | 653 | ieee80211_ht_agg_queue_remove(local, sta, tid, 0); |
eadc8d9e | 654 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
655 | printk(KERN_DEBUG "BA request denied - HW unavailable for" |
656 | " tid %d\n", tid); | |
eadc8d9e | 657 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
eadc8d9e | 658 | *state = HT_AGG_STATE_IDLE; |
b83f4e15 | 659 | goto err_unlock_queue; |
eadc8d9e RR |
660 | } |
661 | ||
662 | /* Will put all the packets in the new SW queue */ | |
9e723492 | 663 | ieee80211_requeue(local, ieee802_1d_to_ac[tid]); |
c2aa2885 | 664 | spin_unlock_bh(&txq->lock); |
b83f4e15 | 665 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 666 | |
eadc8d9e RR |
667 | /* send an addBA request */ |
668 | sta->ampdu_mlme.dialog_token_allocator++; | |
cee24a3e | 669 | sta->ampdu_mlme.tid_tx[tid]->dialog_token = |
eadc8d9e | 670 | sta->ampdu_mlme.dialog_token_allocator; |
cee24a3e | 671 | sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num; |
eadc8d9e | 672 | |
b83f4e15 | 673 | |
d0709a65 | 674 | ieee80211_send_addba_request(sta->sdata->dev, ra, tid, |
cee24a3e RR |
675 | sta->ampdu_mlme.tid_tx[tid]->dialog_token, |
676 | sta->ampdu_mlme.tid_tx[tid]->ssn, | |
eadc8d9e | 677 | 0x40, 5000); |
eadc8d9e | 678 | /* activate the timer for the recipient's addBA response */ |
cee24a3e | 679 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires = |
eadc8d9e | 680 | jiffies + ADDBA_RESP_INTERVAL; |
cee24a3e | 681 | add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
f4ea83dd | 682 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 683 | printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid); |
f4ea83dd | 684 | #endif |
b83f4e15 | 685 | goto exit; |
eadc8d9e | 686 | |
b83f4e15 | 687 | err_unlock_queue: |
cee24a3e RR |
688 | kfree(sta->ampdu_mlme.tid_tx[tid]); |
689 | sta->ampdu_mlme.tid_tx[tid] = NULL; | |
c2aa2885 | 690 | spin_unlock_bh(&txq->lock); |
cee24a3e | 691 | ret = -EBUSY; |
b83f4e15 | 692 | err_unlock_sta: |
07346f81 | 693 | spin_unlock_bh(&sta->lock); |
b83f4e15 | 694 | exit: |
d0709a65 | 695 | rcu_read_unlock(); |
eadc8d9e RR |
696 | return ret; |
697 | } | |
698 | EXPORT_SYMBOL(ieee80211_start_tx_ba_session); | |
699 | ||
700 | int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, | |
701 | u8 *ra, u16 tid, | |
702 | enum ieee80211_back_parties initiator) | |
703 | { | |
704 | struct ieee80211_local *local = hw_to_local(hw); | |
705 | struct sta_info *sta; | |
706 | u8 *state; | |
707 | int ret = 0; | |
708 | DECLARE_MAC_BUF(mac); | |
709 | ||
710 | if (tid >= STA_TID_NUM) | |
711 | return -EINVAL; | |
712 | ||
d0709a65 | 713 | rcu_read_lock(); |
eadc8d9e | 714 | sta = sta_info_get(local, ra); |
d0709a65 JB |
715 | if (!sta) { |
716 | rcu_read_unlock(); | |
eadc8d9e | 717 | return -ENOENT; |
d0709a65 | 718 | } |
eadc8d9e RR |
719 | |
720 | /* check if the TID is in aggregation */ | |
cee24a3e | 721 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 722 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
723 | |
724 | if (*state != HT_AGG_STATE_OPERATIONAL) { | |
eadc8d9e RR |
725 | ret = -ENOENT; |
726 | goto stop_BA_exit; | |
727 | } | |
728 | ||
513a1025 RR |
729 | #ifdef CONFIG_MAC80211_HT_DEBUG |
730 | printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n", | |
731 | print_mac(mac, ra), tid); | |
732 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
733 | ||
eadc8d9e RR |
734 | ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]); |
735 | ||
736 | *state = HT_AGG_STATE_REQ_STOP_BA_MSK | | |
737 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
738 | ||
739 | if (local->ops->ampdu_action) | |
740 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP, | |
741 | ra, tid, NULL); | |
742 | ||
743 | /* case HW denied going back to legacy */ | |
744 | if (ret) { | |
745 | WARN_ON(ret != -EBUSY); | |
746 | *state = HT_AGG_STATE_OPERATIONAL; | |
747 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); | |
748 | goto stop_BA_exit; | |
749 | } | |
750 | ||
751 | stop_BA_exit: | |
07346f81 | 752 | spin_unlock_bh(&sta->lock); |
d0709a65 | 753 | rcu_read_unlock(); |
eadc8d9e RR |
754 | return ret; |
755 | } | |
756 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); | |
757 | ||
758 | void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid) | |
759 | { | |
760 | struct ieee80211_local *local = hw_to_local(hw); | |
761 | struct sta_info *sta; | |
762 | u8 *state; | |
763 | DECLARE_MAC_BUF(mac); | |
764 | ||
765 | if (tid >= STA_TID_NUM) { | |
f4ea83dd | 766 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
767 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", |
768 | tid, STA_TID_NUM); | |
f4ea83dd | 769 | #endif |
eadc8d9e RR |
770 | return; |
771 | } | |
772 | ||
d0709a65 | 773 | rcu_read_lock(); |
eadc8d9e RR |
774 | sta = sta_info_get(local, ra); |
775 | if (!sta) { | |
d0709a65 | 776 | rcu_read_unlock(); |
f4ea83dd | 777 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
778 | printk(KERN_DEBUG "Could not find station: %s\n", |
779 | print_mac(mac, ra)); | |
f4ea83dd | 780 | #endif |
eadc8d9e RR |
781 | return; |
782 | } | |
783 | ||
cee24a3e | 784 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 785 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
786 | |
787 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { | |
f4ea83dd | 788 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
789 | printk(KERN_DEBUG "addBA was not requested yet, state is %d\n", |
790 | *state); | |
f4ea83dd | 791 | #endif |
07346f81 | 792 | spin_unlock_bh(&sta->lock); |
d0709a65 | 793 | rcu_read_unlock(); |
eadc8d9e RR |
794 | return; |
795 | } | |
796 | ||
797 | WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK); | |
798 | ||
799 | *state |= HT_ADDBA_DRV_READY_MSK; | |
800 | ||
801 | if (*state == HT_AGG_STATE_OPERATIONAL) { | |
f4ea83dd | 802 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 803 | printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid); |
f4ea83dd | 804 | #endif |
eadc8d9e RR |
805 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); |
806 | } | |
07346f81 | 807 | spin_unlock_bh(&sta->lock); |
d0709a65 | 808 | rcu_read_unlock(); |
eadc8d9e RR |
809 | } |
810 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb); | |
811 | ||
812 | void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid) | |
813 | { | |
814 | struct ieee80211_local *local = hw_to_local(hw); | |
c2aa2885 | 815 | struct netdev_queue *txq; |
eadc8d9e RR |
816 | struct sta_info *sta; |
817 | u8 *state; | |
818 | int agg_queue; | |
819 | DECLARE_MAC_BUF(mac); | |
820 | ||
821 | if (tid >= STA_TID_NUM) { | |
f4ea83dd | 822 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
823 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", |
824 | tid, STA_TID_NUM); | |
f4ea83dd | 825 | #endif |
eadc8d9e RR |
826 | return; |
827 | } | |
828 | ||
513a1025 RR |
829 | #ifdef CONFIG_MAC80211_HT_DEBUG |
830 | printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n", | |
eadc8d9e | 831 | print_mac(mac, ra), tid); |
513a1025 | 832 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
eadc8d9e | 833 | |
d0709a65 | 834 | rcu_read_lock(); |
eadc8d9e RR |
835 | sta = sta_info_get(local, ra); |
836 | if (!sta) { | |
f4ea83dd | 837 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
838 | printk(KERN_DEBUG "Could not find station: %s\n", |
839 | print_mac(mac, ra)); | |
f4ea83dd | 840 | #endif |
d0709a65 | 841 | rcu_read_unlock(); |
eadc8d9e RR |
842 | return; |
843 | } | |
cee24a3e | 844 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 845 | |
b83f4e15 TW |
846 | /* NOTE: no need to use sta->lock in this state check, as |
847 | * ieee80211_stop_tx_ba_session will let only | |
848 | * one stop call to pass through per sta/tid */ | |
eadc8d9e | 849 | if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) { |
f4ea83dd | 850 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 851 | printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n"); |
f4ea83dd | 852 | #endif |
d0709a65 | 853 | rcu_read_unlock(); |
eadc8d9e RR |
854 | return; |
855 | } | |
856 | ||
857 | if (*state & HT_AGG_STATE_INITIATOR_MSK) | |
d0709a65 | 858 | ieee80211_send_delba(sta->sdata->dev, ra, tid, |
eadc8d9e RR |
859 | WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); |
860 | ||
861 | agg_queue = sta->tid_to_tx_q[tid]; | |
862 | ||
863 | /* avoid ordering issues: we are the only one that can modify | |
864 | * the content of the qdiscs */ | |
e8a0464c | 865 | txq = netdev_get_tx_queue(local->mdev, 0); |
c2aa2885 | 866 | spin_lock_bh(&txq->lock); |
eadc8d9e | 867 | /* remove the queue for this aggregation */ |
9e723492 | 868 | ieee80211_ht_agg_queue_remove(local, sta, tid, 1); |
c2aa2885 | 869 | spin_unlock_bh(&txq->lock); |
eadc8d9e RR |
870 | |
871 | /* we just requeued the all the frames that were in the removed | |
86d804e1 | 872 | * queue, and since we might miss a softirq we do netif_schedule_queue. |
eadc8d9e RR |
873 | * ieee80211_wake_queue is not used here as this queue is not |
874 | * necessarily stopped */ | |
86d804e1 | 875 | netif_schedule_queue(txq); |
b83f4e15 | 876 | spin_lock_bh(&sta->lock); |
eadc8d9e | 877 | *state = HT_AGG_STATE_IDLE; |
cee24a3e RR |
878 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
879 | kfree(sta->ampdu_mlme.tid_tx[tid]); | |
880 | sta->ampdu_mlme.tid_tx[tid] = NULL; | |
07346f81 | 881 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 882 | |
d0709a65 | 883 | rcu_read_unlock(); |
eadc8d9e RR |
884 | } |
885 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb); | |
886 | ||
887 | void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, | |
888 | const u8 *ra, u16 tid) | |
889 | { | |
890 | struct ieee80211_local *local = hw_to_local(hw); | |
891 | struct ieee80211_ra_tid *ra_tid; | |
892 | struct sk_buff *skb = dev_alloc_skb(0); | |
893 | ||
894 | if (unlikely(!skb)) { | |
f4ea83dd | 895 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
896 | if (net_ratelimit()) |
897 | printk(KERN_WARNING "%s: Not enough memory, " | |
898 | "dropping start BA session", skb->dev->name); | |
f4ea83dd | 899 | #endif |
eadc8d9e RR |
900 | return; |
901 | } | |
902 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
903 | memcpy(&ra_tid->ra, ra, ETH_ALEN); | |
904 | ra_tid->tid = tid; | |
905 | ||
906 | skb->pkt_type = IEEE80211_ADDBA_MSG; | |
907 | skb_queue_tail(&local->skb_queue, skb); | |
908 | tasklet_schedule(&local->tasklet); | |
909 | } | |
910 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); | |
911 | ||
912 | void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, | |
913 | const u8 *ra, u16 tid) | |
914 | { | |
915 | struct ieee80211_local *local = hw_to_local(hw); | |
916 | struct ieee80211_ra_tid *ra_tid; | |
917 | struct sk_buff *skb = dev_alloc_skb(0); | |
918 | ||
919 | if (unlikely(!skb)) { | |
f4ea83dd | 920 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
921 | if (net_ratelimit()) |
922 | printk(KERN_WARNING "%s: Not enough memory, " | |
923 | "dropping stop BA session", skb->dev->name); | |
f4ea83dd | 924 | #endif |
eadc8d9e RR |
925 | return; |
926 | } | |
927 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
928 | memcpy(&ra_tid->ra, ra, ETH_ALEN); | |
929 | ra_tid->tid = tid; | |
930 | ||
931 | skb->pkt_type = IEEE80211_DELBA_MSG; | |
932 | skb_queue_tail(&local->skb_queue, skb); | |
933 | tasklet_schedule(&local->tasklet); | |
934 | } | |
935 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); | |
936 | ||
f0706e82 JB |
937 | static void ieee80211_set_multicast_list(struct net_device *dev) |
938 | { | |
939 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
940 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4150c572 | 941 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
f0706e82 | 942 | |
4150c572 JB |
943 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
944 | promisc = !!(dev->flags & IFF_PROMISC); | |
b52f2198 JB |
945 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
946 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
4150c572 JB |
947 | |
948 | if (allmulti != sdata_allmulti) { | |
949 | if (dev->flags & IFF_ALLMULTI) | |
53918994 | 950 | atomic_inc(&local->iff_allmultis); |
4150c572 | 951 | else |
53918994 | 952 | atomic_dec(&local->iff_allmultis); |
13262ffd | 953 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
f0706e82 | 954 | } |
4150c572 JB |
955 | |
956 | if (promisc != sdata_promisc) { | |
957 | if (dev->flags & IFF_PROMISC) | |
53918994 | 958 | atomic_inc(&local->iff_promiscs); |
4150c572 | 959 | else |
53918994 | 960 | atomic_dec(&local->iff_promiscs); |
13262ffd | 961 | sdata->flags ^= IEEE80211_SDATA_PROMISC; |
f0706e82 | 962 | } |
4150c572 JB |
963 | |
964 | dev_mc_sync(local->mdev, dev); | |
f0706e82 JB |
965 | } |
966 | ||
3b04ddde SH |
967 | static const struct header_ops ieee80211_header_ops = { |
968 | .create = eth_header, | |
969 | .parse = header_parse_80211, | |
970 | .rebuild = eth_rebuild_header, | |
971 | .cache = eth_header_cache, | |
972 | .cache_update = eth_header_cache_update, | |
973 | }; | |
974 | ||
b2c258fb | 975 | void ieee80211_if_setup(struct net_device *dev) |
f0706e82 | 976 | { |
b2c258fb JB |
977 | ether_setup(dev); |
978 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
979 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
980 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
981 | dev->change_mtu = ieee80211_change_mtu; | |
b2c258fb JB |
982 | dev->open = ieee80211_open; |
983 | dev->stop = ieee80211_stop; | |
75636525 | 984 | dev->destructor = free_netdev; |
b2c258fb | 985 | } |
f0706e82 | 986 | |
b2c258fb JB |
987 | /* everything else */ |
988 | ||
9d139c81 | 989 | int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) |
b2c258fb | 990 | { |
9d139c81 | 991 | struct ieee80211_local *local = sdata->local; |
b2c258fb | 992 | struct ieee80211_if_conf conf; |
b2c258fb | 993 | |
9d139c81 JB |
994 | if (WARN_ON(!netif_running(sdata->dev))) |
995 | return 0; | |
996 | ||
997 | if (!local->ops->config_interface) | |
f0706e82 | 998 | return 0; |
f0706e82 | 999 | |
b2c258fb | 1000 | memset(&conf, 0, sizeof(conf)); |
9d139c81 JB |
1001 | conf.changed = changed; |
1002 | ||
51fb61e7 JB |
1003 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || |
1004 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { | |
4150c572 | 1005 | conf.bssid = sdata->u.sta.bssid; |
b2c258fb JB |
1006 | conf.ssid = sdata->u.sta.ssid; |
1007 | conf.ssid_len = sdata->u.sta.ssid_len; | |
51fb61e7 | 1008 | } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { |
9d139c81 | 1009 | conf.bssid = sdata->dev->dev_addr; |
b2c258fb JB |
1010 | conf.ssid = sdata->u.ap.ssid; |
1011 | conf.ssid_len = sdata->u.ap.ssid_len; | |
9d139c81 JB |
1012 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1013 | u8 zero[ETH_ALEN] = { 0 }; | |
1014 | conf.bssid = zero; | |
1015 | conf.ssid = zero; | |
1016 | conf.ssid_len = 0; | |
1017 | } else { | |
1018 | WARN_ON(1); | |
1019 | return -EINVAL; | |
f0706e82 | 1020 | } |
f0706e82 | 1021 | |
9d139c81 JB |
1022 | if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID))) |
1023 | return -EINVAL; | |
f0706e82 | 1024 | |
9d139c81 JB |
1025 | if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID))) |
1026 | return -EINVAL; | |
f0706e82 | 1027 | |
9d139c81 JB |
1028 | return local->ops->config_interface(local_to_hw(local), |
1029 | &sdata->vif, &conf); | |
b2c258fb | 1030 | } |
f0706e82 | 1031 | |
b2c258fb JB |
1032 | int ieee80211_hw_config(struct ieee80211_local *local) |
1033 | { | |
b2c258fb JB |
1034 | struct ieee80211_channel *chan; |
1035 | int ret = 0; | |
f0706e82 | 1036 | |
8318d78a | 1037 | if (local->sta_sw_scanning) |
b2c258fb | 1038 | chan = local->scan_channel; |
8318d78a | 1039 | else |
b2c258fb | 1040 | chan = local->oper_channel; |
f0706e82 | 1041 | |
8318d78a JB |
1042 | local->hw.conf.channel = chan; |
1043 | ||
1044 | if (!local->hw.conf.power_level) | |
1045 | local->hw.conf.power_level = chan->max_power; | |
1046 | else | |
1047 | local->hw.conf.power_level = min(chan->max_power, | |
1048 | local->hw.conf.power_level); | |
1049 | ||
1050 | local->hw.conf.max_antenna_gain = chan->max_antenna_gain; | |
f0706e82 | 1051 | |
b2c258fb | 1052 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
8318d78a JB |
1053 | printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n", |
1054 | wiphy_name(local->hw.wiphy), chan->center_freq); | |
1055 | #endif | |
b2c258fb | 1056 | |
f7c4daed | 1057 | if (local->open_count) |
b2c258fb | 1058 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); |
f0706e82 | 1059 | |
b2c258fb JB |
1060 | return ret; |
1061 | } | |
f0706e82 | 1062 | |
d3c990fb | 1063 | /** |
38668c05 TW |
1064 | * ieee80211_handle_ht should be used only after legacy configuration |
1065 | * has been determined namely band, as ht configuration depends upon | |
1066 | * the hardware's HT abilities for a _specific_ band. | |
d3c990fb | 1067 | */ |
38668c05 | 1068 | u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht, |
d3c990fb RR |
1069 | struct ieee80211_ht_info *req_ht_cap, |
1070 | struct ieee80211_ht_bss_info *req_bss_cap) | |
1071 | { | |
1072 | struct ieee80211_conf *conf = &local->hw.conf; | |
8318d78a | 1073 | struct ieee80211_supported_band *sband; |
38668c05 TW |
1074 | struct ieee80211_ht_info ht_conf; |
1075 | struct ieee80211_ht_bss_info ht_bss_conf; | |
38668c05 | 1076 | u32 changed = 0; |
edcdf8b2 RR |
1077 | int i; |
1078 | u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS; | |
1079 | u8 tx_mcs_set_cap; | |
d3c990fb | 1080 | |
8318d78a JB |
1081 | sband = local->hw.wiphy->bands[conf->channel->band]; |
1082 | ||
edcdf8b2 RR |
1083 | memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info)); |
1084 | memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info)); | |
1085 | ||
d3c990fb | 1086 | /* HT is not supported */ |
8318d78a | 1087 | if (!sband->ht_info.ht_supported) { |
d3c990fb | 1088 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
edcdf8b2 | 1089 | goto out; |
d3c990fb RR |
1090 | } |
1091 | ||
edcdf8b2 RR |
1092 | /* disable HT */ |
1093 | if (!enable_ht) { | |
1094 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) | |
38668c05 | 1095 | changed |= BSS_CHANGED_HT; |
edcdf8b2 RR |
1096 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
1097 | conf->ht_conf.ht_supported = 0; | |
1098 | goto out; | |
1099 | } | |
38668c05 | 1100 | |
38668c05 | 1101 | |
edcdf8b2 RR |
1102 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) |
1103 | changed |= BSS_CHANGED_HT; | |
38668c05 | 1104 | |
edcdf8b2 RR |
1105 | conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; |
1106 | ht_conf.ht_supported = 1; | |
38668c05 | 1107 | |
edcdf8b2 RR |
1108 | ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap; |
1109 | ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS); | |
1110 | ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS; | |
1111 | ht_bss_conf.primary_channel = req_bss_cap->primary_channel; | |
1112 | ht_bss_conf.bss_cap = req_bss_cap->bss_cap; | |
1113 | ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; | |
38668c05 | 1114 | |
edcdf8b2 RR |
1115 | ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; |
1116 | ht_conf.ampdu_density = req_ht_cap->ampdu_density; | |
38668c05 | 1117 | |
edcdf8b2 RR |
1118 | /* Bits 96-100 */ |
1119 | tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12]; | |
1120 | ||
1121 | /* configure suppoerted Tx MCS according to requested MCS | |
1122 | * (based in most cases on Rx capabilities of peer) and self | |
1123 | * Tx MCS capabilities (as defined by low level driver HW | |
1124 | * Tx capabilities) */ | |
1125 | if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED)) | |
1126 | goto check_changed; | |
d3c990fb | 1127 | |
edcdf8b2 RR |
1128 | /* Counting from 0 therfore + 1 */ |
1129 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF) | |
1130 | max_tx_streams = ((tx_mcs_set_cap & | |
1131 | IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1; | |
1132 | ||
1133 | for (i = 0; i < max_tx_streams; i++) | |
1134 | ht_conf.supp_mcs_set[i] = | |
1135 | sband->ht_info.supp_mcs_set[i] & | |
1136 | req_ht_cap->supp_mcs_set[i]; | |
1137 | ||
1138 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM) | |
1139 | for (i = IEEE80211_SUPP_MCS_SET_UEQM; | |
1140 | i < IEEE80211_SUPP_MCS_SET_LEN; i++) | |
1141 | ht_conf.supp_mcs_set[i] = | |
1142 | sband->ht_info.supp_mcs_set[i] & | |
1143 | req_ht_cap->supp_mcs_set[i]; | |
1144 | ||
1145 | check_changed: | |
1146 | /* if bss configuration changed store the new one */ | |
1147 | if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) || | |
1148 | memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) { | |
1149 | changed |= BSS_CHANGED_HT; | |
1150 | memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf)); | |
1151 | memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf)); | |
1152 | } | |
1153 | out: | |
38668c05 | 1154 | return changed; |
d3c990fb RR |
1155 | } |
1156 | ||
471b3efd JB |
1157 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
1158 | u32 changed) | |
d9430a32 | 1159 | { |
471b3efd JB |
1160 | struct ieee80211_local *local = sdata->local; |
1161 | ||
1162 | if (!changed) | |
1163 | return; | |
1164 | ||
1165 | if (local->ops->bss_info_changed) | |
1166 | local->ops->bss_info_changed(local_to_hw(local), | |
1167 | &sdata->vif, | |
1168 | &sdata->bss_conf, | |
1169 | changed); | |
d9430a32 DD |
1170 | } |
1171 | ||
fc32f924 | 1172 | u32 ieee80211_reset_erp_info(struct net_device *dev) |
d9430a32 DD |
1173 | { |
1174 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1175 | ||
471b3efd JB |
1176 | sdata->bss_conf.use_cts_prot = 0; |
1177 | sdata->bss_conf.use_short_preamble = 0; | |
fc32f924 | 1178 | return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE; |
d9430a32 DD |
1179 | } |
1180 | ||
f0706e82 | 1181 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 1182 | struct sk_buff *skb) |
f0706e82 JB |
1183 | { |
1184 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 1185 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
1186 | int tmp; |
1187 | ||
1188 | skb->dev = local->mdev; | |
f0706e82 | 1189 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 1190 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
1191 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
1192 | tmp = skb_queue_len(&local->skb_queue) + | |
1193 | skb_queue_len(&local->skb_queue_unreliable); | |
1194 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
1195 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
1196 | dev_kfree_skb_irq(skb); |
1197 | tmp--; | |
1198 | I802_DEBUG_INC(local->tx_status_drop); | |
1199 | } | |
1200 | tasklet_schedule(&local->tasklet); | |
1201 | } | |
1202 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
1203 | ||
1204 | static void ieee80211_tasklet_handler(unsigned long data) | |
1205 | { | |
1206 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
1207 | struct sk_buff *skb; | |
1208 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 1209 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
1210 | |
1211 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
1212 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
1213 | switch (skb->pkt_type) { | |
1214 | case IEEE80211_RX_MSG: | |
1215 | /* status is in skb->cb */ | |
1216 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 1217 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
1218 | * netstack. */ |
1219 | skb->pkt_type = 0; | |
1220 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
1221 | break; | |
1222 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 1223 | skb->pkt_type = 0; |
e039fa4a | 1224 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 1225 | break; |
eadc8d9e RR |
1226 | case IEEE80211_DELBA_MSG: |
1227 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
1228 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
1229 | ra_tid->ra, ra_tid->tid); | |
1230 | dev_kfree_skb(skb); | |
1231 | break; | |
1232 | case IEEE80211_ADDBA_MSG: | |
1233 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
1234 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
1235 | ra_tid->ra, ra_tid->tid); | |
1236 | dev_kfree_skb(skb); | |
1237 | break ; | |
f4ea83dd JB |
1238 | default: |
1239 | WARN_ON(1); | |
f0706e82 JB |
1240 | dev_kfree_skb(skb); |
1241 | break; | |
1242 | } | |
1243 | } | |
1244 | } | |
1245 | ||
f0706e82 JB |
1246 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
1247 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
1248 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
1249 | * Also, tx_packet_data in cb is restored from tx_control. */ | |
1250 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, | |
1251 | struct ieee80211_key *key, | |
e039fa4a | 1252 | struct sk_buff *skb) |
f0706e82 JB |
1253 | { |
1254 | int hdrlen, iv_len, mic_len; | |
e039fa4a JB |
1255 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1256 | ||
1257 | info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
1258 | IEEE80211_TX_CTL_DO_NOT_ENCRYPT | | |
1259 | IEEE80211_TX_CTL_REQUEUE | | |
1260 | IEEE80211_TX_CTL_EAPOL_FRAME; | |
f0706e82 JB |
1261 | |
1262 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
1263 | ||
1264 | if (!key) | |
1265 | goto no_key; | |
1266 | ||
8f20fc24 | 1267 | switch (key->conf.alg) { |
f0706e82 JB |
1268 | case ALG_WEP: |
1269 | iv_len = WEP_IV_LEN; | |
1270 | mic_len = WEP_ICV_LEN; | |
1271 | break; | |
1272 | case ALG_TKIP: | |
1273 | iv_len = TKIP_IV_LEN; | |
1274 | mic_len = TKIP_ICV_LEN; | |
1275 | break; | |
1276 | case ALG_CCMP: | |
1277 | iv_len = CCMP_HDR_LEN; | |
1278 | mic_len = CCMP_MIC_LEN; | |
1279 | break; | |
1280 | default: | |
1281 | goto no_key; | |
1282 | } | |
1283 | ||
8f20fc24 | 1284 | if (skb->len >= mic_len && |
11a843b7 | 1285 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 JB |
1286 | skb_trim(skb, skb->len - mic_len); |
1287 | if (skb->len >= iv_len && skb->len > hdrlen) { | |
1288 | memmove(skb->data + iv_len, skb->data, hdrlen); | |
1289 | skb_pull(skb, iv_len); | |
1290 | } | |
1291 | ||
1292 | no_key: | |
1293 | { | |
1294 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1295 | u16 fc = le16_to_cpu(hdr->frame_control); | |
1296 | if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { | |
1297 | fc &= ~IEEE80211_STYPE_QOS_DATA; | |
1298 | hdr->frame_control = cpu_to_le16(fc); | |
1299 | memmove(skb->data + 2, skb->data, hdrlen - 2); | |
1300 | skb_pull(skb, 2); | |
1301 | } | |
1302 | } | |
1303 | } | |
1304 | ||
d46e144b JB |
1305 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
1306 | struct sta_info *sta, | |
e039fa4a | 1307 | struct sk_buff *skb) |
d46e144b | 1308 | { |
e039fa4a JB |
1309 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1310 | ||
d46e144b JB |
1311 | sta->tx_filtered_count++; |
1312 | ||
1313 | /* | |
1314 | * Clear the TX filter mask for this STA when sending the next | |
1315 | * packet. If the STA went to power save mode, this will happen | |
f6d97104 | 1316 | * when it wakes up for the next time. |
d46e144b | 1317 | */ |
07346f81 | 1318 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
1319 | |
1320 | /* | |
1321 | * This code races in the following way: | |
1322 | * | |
1323 | * (1) STA sends frame indicating it will go to sleep and does so | |
1324 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
1325 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
1326 | * (4) we get TX status before having processed the frame and | |
1327 | * knowing that the STA has gone to sleep. | |
1328 | * | |
1329 | * This is actually quite unlikely even when both those events are | |
1330 | * processed from interrupts coming in quickly after one another or | |
1331 | * even at the same time because we queue both TX status events and | |
1332 | * RX frames to be processed by a tasklet and process them in the | |
1333 | * same order that they were received or TX status last. Hence, there | |
1334 | * is no race as long as the frame RX is processed before the next TX | |
1335 | * status, which drivers can ensure, see below. | |
1336 | * | |
1337 | * Note that this can only happen if the hardware or firmware can | |
1338 | * actually add STAs to the filter list, if this is done by the | |
1339 | * driver in response to set_tim() (which will only reduce the race | |
1340 | * this whole filtering tries to solve, not completely solve it) | |
1341 | * this situation cannot happen. | |
1342 | * | |
1343 | * To completely solve this race drivers need to make sure that they | |
1344 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
1345 | * functions and | |
1346 | * (b) always process RX events before TX status events if ordering | |
1347 | * can be unknown, for example with different interrupt status | |
1348 | * bits. | |
1349 | */ | |
07346f81 | 1350 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 1351 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 1352 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
1353 | skb_queue_tail(&sta->tx_filtered, skb); |
1354 | return; | |
1355 | } | |
1356 | ||
07346f81 | 1357 | if (!test_sta_flags(sta, WLAN_STA_PS) && |
e039fa4a | 1358 | !(info->flags & IEEE80211_TX_CTL_REQUEUE)) { |
d46e144b | 1359 | /* Software retry the packet once */ |
e039fa4a JB |
1360 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
1361 | ieee80211_remove_tx_extra(local, sta->key, skb); | |
d46e144b JB |
1362 | dev_queue_xmit(skb); |
1363 | return; | |
1364 | } | |
1365 | ||
f4ea83dd | 1366 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
d46e144b JB |
1367 | if (net_ratelimit()) |
1368 | printk(KERN_DEBUG "%s: dropped TX filtered frame, " | |
1369 | "queue_len=%d PS=%d @%lu\n", | |
1370 | wiphy_name(local->hw.wiphy), | |
1371 | skb_queue_len(&sta->tx_filtered), | |
07346f81 | 1372 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
f4ea83dd | 1373 | #endif |
d46e144b JB |
1374 | dev_kfree_skb(skb); |
1375 | } | |
1376 | ||
e039fa4a | 1377 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
1378 | { |
1379 | struct sk_buff *skb2; | |
1380 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1381 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 1382 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 1383 | u16 frag, type; |
429a3805 | 1384 | __le16 fc; |
b306f453 JB |
1385 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
1386 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 1387 | struct net_device *prev_dev = NULL; |
429a3805 | 1388 | struct sta_info *sta; |
f0706e82 | 1389 | |
d0709a65 JB |
1390 | rcu_read_lock(); |
1391 | ||
e039fa4a | 1392 | if (info->status.excessive_retries) { |
f0706e82 JB |
1393 | sta = sta_info_get(local, hdr->addr1); |
1394 | if (sta) { | |
07346f81 | 1395 | if (test_sta_flags(sta, WLAN_STA_PS)) { |
d46e144b JB |
1396 | /* |
1397 | * The STA is in power save mode, so assume | |
f0706e82 JB |
1398 | * that this TX packet failed because of that. |
1399 | */ | |
e039fa4a | 1400 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 1401 | rcu_read_unlock(); |
d46e144b | 1402 | return; |
f0706e82 | 1403 | } |
f0706e82 JB |
1404 | } |
1405 | } | |
1406 | ||
429a3805 RR |
1407 | fc = hdr->frame_control; |
1408 | ||
1409 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && | |
1410 | (ieee80211_is_data_qos(fc))) { | |
1411 | u16 tid, ssn; | |
1412 | u8 *qc; | |
1413 | sta = sta_info_get(local, hdr->addr1); | |
1414 | if (sta) { | |
1415 | qc = ieee80211_get_qos_ctl(hdr); | |
1416 | tid = qc[0] & 0xf; | |
1417 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
1418 | & IEEE80211_SCTL_SEQ); | |
1419 | ieee80211_send_bar(sta->sdata->dev, hdr->addr1, | |
1420 | tid, ssn); | |
1421 | } | |
1422 | } | |
1423 | ||
e039fa4a | 1424 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
f0706e82 JB |
1425 | sta = sta_info_get(local, hdr->addr1); |
1426 | if (sta) { | |
e039fa4a | 1427 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 1428 | rcu_read_unlock(); |
f0706e82 JB |
1429 | return; |
1430 | } | |
1abbe498 | 1431 | } else |
e039fa4a | 1432 | rate_control_tx_status(local->mdev, skb); |
f0706e82 | 1433 | |
d0709a65 JB |
1434 | rcu_read_unlock(); |
1435 | ||
f0706e82 JB |
1436 | ieee80211_led_tx(local, 0); |
1437 | ||
1438 | /* SNMP counters | |
1439 | * Fragments are passed to low-level drivers as separate skbs, so these | |
1440 | * are actually fragments, not frames. Update frame counters only for | |
1441 | * the first fragment of the frame. */ | |
1442 | ||
1443 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
1444 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
1445 | ||
e039fa4a | 1446 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
1447 | if (frag == 0) { |
1448 | local->dot11TransmittedFrameCount++; | |
1449 | if (is_multicast_ether_addr(hdr->addr1)) | |
1450 | local->dot11MulticastTransmittedFrameCount++; | |
e039fa4a | 1451 | if (info->status.retry_count > 0) |
f0706e82 | 1452 | local->dot11RetryCount++; |
e039fa4a | 1453 | if (info->status.retry_count > 1) |
f0706e82 JB |
1454 | local->dot11MultipleRetryCount++; |
1455 | } | |
1456 | ||
1457 | /* This counter shall be incremented for an acknowledged MPDU | |
1458 | * with an individual address in the address 1 field or an MPDU | |
1459 | * with a multicast address in the address 1 field of type Data | |
1460 | * or Management. */ | |
1461 | if (!is_multicast_ether_addr(hdr->addr1) || | |
1462 | type == IEEE80211_FTYPE_DATA || | |
1463 | type == IEEE80211_FTYPE_MGMT) | |
1464 | local->dot11TransmittedFragmentCount++; | |
1465 | } else { | |
1466 | if (frag == 0) | |
1467 | local->dot11FailedCount++; | |
1468 | } | |
1469 | ||
b306f453 JB |
1470 | /* this was a transmitted frame, but now we want to reuse it */ |
1471 | skb_orphan(skb); | |
1472 | ||
3d30d949 MW |
1473 | /* |
1474 | * This is a bit racy but we can avoid a lot of work | |
1475 | * with this test... | |
1476 | */ | |
1477 | if (!local->monitors && !local->cooked_mntrs) { | |
f0706e82 JB |
1478 | dev_kfree_skb(skb); |
1479 | return; | |
1480 | } | |
1481 | ||
b306f453 | 1482 | /* send frame to monitor interfaces now */ |
f0706e82 | 1483 | |
b306f453 JB |
1484 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
1485 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
1486 | dev_kfree_skb(skb); |
1487 | return; | |
1488 | } | |
f0706e82 | 1489 | |
988c0f72 | 1490 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
1491 | skb_push(skb, sizeof(*rthdr)); |
1492 | ||
1493 | memset(rthdr, 0, sizeof(*rthdr)); | |
1494 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
1495 | rthdr->hdr.it_present = | |
1496 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
1497 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
1498 | ||
e039fa4a | 1499 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
1500 | !is_multicast_ether_addr(hdr->addr1)) |
1501 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
1502 | ||
e039fa4a JB |
1503 | if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) && |
1504 | (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) | |
b306f453 | 1505 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e039fa4a | 1506 | else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) |
b306f453 JB |
1507 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
1508 | ||
e039fa4a | 1509 | rthdr->data_retries = info->status.retry_count; |
b306f453 | 1510 | |
3d30d949 MW |
1511 | /* XXX: is this sufficient for BPF? */ |
1512 | skb_set_mac_header(skb, 0); | |
1513 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1514 | skb->pkt_type = PACKET_OTHERHOST; | |
1515 | skb->protocol = htons(ETH_P_802_2); | |
1516 | memset(skb->cb, 0, sizeof(skb->cb)); | |
1517 | ||
79010420 | 1518 | rcu_read_lock(); |
79010420 | 1519 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 1520 | if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) { |
b306f453 JB |
1521 | if (!netif_running(sdata->dev)) |
1522 | continue; | |
3d30d949 MW |
1523 | |
1524 | if (prev_dev) { | |
79010420 | 1525 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
1526 | if (skb2) { |
1527 | skb2->dev = prev_dev; | |
1528 | netif_rx(skb2); | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | prev_dev = sdata->dev; | |
b306f453 JB |
1533 | } |
1534 | } | |
3d30d949 MW |
1535 | if (prev_dev) { |
1536 | skb->dev = prev_dev; | |
1537 | netif_rx(skb); | |
1538 | skb = NULL; | |
1539 | } | |
79010420 | 1540 | rcu_read_unlock(); |
3d30d949 | 1541 | dev_kfree_skb(skb); |
f0706e82 JB |
1542 | } |
1543 | EXPORT_SYMBOL(ieee80211_tx_status); | |
1544 | ||
f0706e82 JB |
1545 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
1546 | const struct ieee80211_ops *ops) | |
1547 | { | |
f0706e82 | 1548 | struct ieee80211_local *local; |
f0706e82 JB |
1549 | int priv_size; |
1550 | struct wiphy *wiphy; | |
1551 | ||
1552 | /* Ensure 32-byte alignment of our private data and hw private data. | |
1553 | * We use the wiphy priv data for both our ieee80211_local and for | |
1554 | * the driver's private data | |
1555 | * | |
1556 | * In memory it'll be like this: | |
1557 | * | |
1558 | * +-------------------------+ | |
1559 | * | struct wiphy | | |
1560 | * +-------------------------+ | |
1561 | * | struct ieee80211_local | | |
1562 | * +-------------------------+ | |
1563 | * | driver's private data | | |
1564 | * +-------------------------+ | |
1565 | * | |
1566 | */ | |
1567 | priv_size = ((sizeof(struct ieee80211_local) + | |
1568 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
1569 | priv_data_len; | |
1570 | ||
1571 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
1572 | ||
1573 | if (!wiphy) | |
1574 | return NULL; | |
1575 | ||
1576 | wiphy->privid = mac80211_wiphy_privid; | |
1577 | ||
1578 | local = wiphy_priv(wiphy); | |
1579 | local->hw.wiphy = wiphy; | |
1580 | ||
1581 | local->hw.priv = (char *)local + | |
1582 | ((sizeof(struct ieee80211_local) + | |
1583 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
1584 | ||
4480f15c | 1585 | BUG_ON(!ops->tx); |
4150c572 JB |
1586 | BUG_ON(!ops->start); |
1587 | BUG_ON(!ops->stop); | |
4480f15c JB |
1588 | BUG_ON(!ops->config); |
1589 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
1590 | BUG_ON(!ops->remove_interface); |
1591 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
1592 | local->ops = ops; |
1593 | ||
f0706e82 JB |
1594 | local->hw.queues = 1; /* default */ |
1595 | ||
f0706e82 JB |
1596 | local->bridge_packets = 1; |
1597 | ||
1598 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; | |
1599 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
1600 | local->short_retry_limit = 7; | |
1601 | local->long_retry_limit = 4; | |
1602 | local->hw.conf.radio_enabled = 1; | |
f0706e82 | 1603 | |
79010420 | 1604 | INIT_LIST_HEAD(&local->interfaces); |
f0706e82 | 1605 | |
b16bd15c JB |
1606 | spin_lock_init(&local->key_lock); |
1607 | ||
f0706e82 | 1608 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); |
f0706e82 JB |
1609 | |
1610 | sta_info_init(local); | |
1611 | ||
f0706e82 JB |
1612 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
1613 | (unsigned long)local); | |
1614 | tasklet_disable(&local->tx_pending_tasklet); | |
1615 | ||
1616 | tasklet_init(&local->tasklet, | |
1617 | ieee80211_tasklet_handler, | |
1618 | (unsigned long) local); | |
1619 | tasklet_disable(&local->tasklet); | |
1620 | ||
1621 | skb_queue_head_init(&local->skb_queue); | |
1622 | skb_queue_head_init(&local->skb_queue_unreliable); | |
1623 | ||
1624 | return local_to_hw(local); | |
1625 | } | |
1626 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
1627 | ||
1628 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
1629 | { | |
1630 | struct ieee80211_local *local = hw_to_local(hw); | |
1631 | const char *name; | |
1632 | int result; | |
8318d78a | 1633 | enum ieee80211_band band; |
96d51056 | 1634 | struct net_device *mdev; |
3e122be0 | 1635 | struct wireless_dev *mwdev; |
8318d78a JB |
1636 | |
1637 | /* | |
1638 | * generic code guarantees at least one band, | |
1639 | * set this very early because much code assumes | |
1640 | * that hw.conf.channel is assigned | |
1641 | */ | |
1642 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1643 | struct ieee80211_supported_band *sband; | |
1644 | ||
1645 | sband = local->hw.wiphy->bands[band]; | |
1646 | if (sband) { | |
1647 | /* init channel we're on */ | |
1648 | local->hw.conf.channel = | |
1649 | local->oper_channel = | |
1650 | local->scan_channel = &sband->channels[0]; | |
1651 | break; | |
1652 | } | |
1653 | } | |
f0706e82 JB |
1654 | |
1655 | result = wiphy_register(local->hw.wiphy); | |
1656 | if (result < 0) | |
1657 | return result; | |
1658 | ||
e2530083 JB |
1659 | /* |
1660 | * We use the number of queues for feature tests (QoS, HT) internally | |
1661 | * so restrict them appropriately. | |
1662 | */ | |
1663 | #ifdef CONFIG_MAC80211_QOS | |
1664 | if (hw->queues > IEEE80211_MAX_QUEUES) | |
1665 | hw->queues = IEEE80211_MAX_QUEUES; | |
1666 | if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) | |
1667 | hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; | |
1668 | if (hw->queues < 4) | |
1669 | hw->ampdu_queues = 0; | |
1670 | #else | |
1671 | hw->queues = 1; | |
1672 | hw->ampdu_queues = 0; | |
1673 | #endif | |
1674 | ||
3e122be0 | 1675 | mdev = alloc_netdev_mq(sizeof(struct wireless_dev), |
e2530083 JB |
1676 | "wmaster%d", ether_setup, |
1677 | ieee80211_num_queues(hw)); | |
96d51056 JB |
1678 | if (!mdev) |
1679 | goto fail_mdev_alloc; | |
1680 | ||
3e122be0 JB |
1681 | mwdev = netdev_priv(mdev); |
1682 | mdev->ieee80211_ptr = mwdev; | |
1683 | mwdev->wiphy = local->hw.wiphy; | |
96d51056 JB |
1684 | |
1685 | local->mdev = mdev; | |
1686 | ||
3e122be0 | 1687 | ieee80211_rx_bss_list_init(local); |
96d51056 JB |
1688 | |
1689 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
1690 | mdev->open = ieee80211_master_open; | |
1691 | mdev->stop = ieee80211_master_stop; | |
1692 | mdev->type = ARPHRD_IEEE80211; | |
1693 | mdev->header_ops = &ieee80211_header_ops; | |
1694 | mdev->set_multicast_list = ieee80211_master_set_multicast_list; | |
1695 | ||
f0706e82 | 1696 | name = wiphy_dev(local->hw.wiphy)->driver->name; |
59959a61 | 1697 | local->hw.workqueue = create_freezeable_workqueue(name); |
f0706e82 JB |
1698 | if (!local->hw.workqueue) { |
1699 | result = -ENOMEM; | |
1700 | goto fail_workqueue; | |
1701 | } | |
1702 | ||
b306f453 JB |
1703 | /* |
1704 | * The hardware needs headroom for sending the frame, | |
1705 | * and we need some headroom for passing the frame to monitor | |
1706 | * interfaces, but never both at the same time. | |
1707 | */ | |
33ccad35 JB |
1708 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
1709 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 1710 | |
e9f207f0 JB |
1711 | debugfs_hw_add(local); |
1712 | ||
dc0ae30c TW |
1713 | if (local->hw.conf.beacon_int < 10) |
1714 | local->hw.conf.beacon_int = 100; | |
f0706e82 | 1715 | |
566bfe5a BR |
1716 | local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | |
1717 | IEEE80211_HW_SIGNAL_DB | | |
1718 | IEEE80211_HW_SIGNAL_DBM) ? | |
f0706e82 | 1719 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; |
566bfe5a | 1720 | local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? |
f0706e82 | 1721 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; |
566bfe5a | 1722 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
f0706e82 JB |
1723 | local->wstats_flags |= IW_QUAL_DBM; |
1724 | ||
1725 | result = sta_info_start(local); | |
1726 | if (result < 0) | |
1727 | goto fail_sta_info; | |
1728 | ||
1729 | rtnl_lock(); | |
1730 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
1731 | if (result < 0) | |
1732 | goto fail_dev; | |
1733 | ||
1734 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
1735 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
1736 | ||
1737 | result = register_netdevice(local->mdev); | |
1738 | if (result < 0) | |
1739 | goto fail_dev; | |
1740 | ||
830f9038 JB |
1741 | result = ieee80211_init_rate_ctrl_alg(local, |
1742 | hw->rate_control_algorithm); | |
f0706e82 JB |
1743 | if (result < 0) { |
1744 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 1745 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1746 | goto fail_rate; |
1747 | } | |
1748 | ||
1749 | result = ieee80211_wep_init(local); | |
1750 | ||
1751 | if (result < 0) { | |
1752 | printk(KERN_DEBUG "%s: Failed to initialize wep\n", | |
dd1cd4c6 | 1753 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1754 | goto fail_wep; |
1755 | } | |
1756 | ||
1757 | ieee80211_install_qdisc(local->mdev); | |
1758 | ||
1759 | /* add one default STA interface */ | |
3e122be0 | 1760 | result = ieee80211_if_add(local, "wlan%d", NULL, |
ee385855 | 1761 | IEEE80211_IF_TYPE_STA, NULL); |
f0706e82 JB |
1762 | if (result) |
1763 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
dd1cd4c6 | 1764 | wiphy_name(local->hw.wiphy)); |
f0706e82 | 1765 | |
f0706e82 JB |
1766 | rtnl_unlock(); |
1767 | ||
1768 | ieee80211_led_init(local); | |
1769 | ||
1770 | return 0; | |
1771 | ||
1772 | fail_wep: | |
1773 | rate_control_deinitialize(local); | |
1774 | fail_rate: | |
1775 | unregister_netdevice(local->mdev); | |
339a7c41 | 1776 | local->mdev = NULL; |
f0706e82 JB |
1777 | fail_dev: |
1778 | rtnl_unlock(); | |
1779 | sta_info_stop(local); | |
1780 | fail_sta_info: | |
e9f207f0 | 1781 | debugfs_hw_del(local); |
f0706e82 JB |
1782 | destroy_workqueue(local->hw.workqueue); |
1783 | fail_workqueue: | |
3e122be0 JB |
1784 | if (local->mdev) |
1785 | free_netdev(local->mdev); | |
96d51056 | 1786 | fail_mdev_alloc: |
f0706e82 JB |
1787 | wiphy_unregister(local->hw.wiphy); |
1788 | return result; | |
1789 | } | |
1790 | EXPORT_SYMBOL(ieee80211_register_hw); | |
1791 | ||
f0706e82 JB |
1792 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
1793 | { | |
1794 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 JB |
1795 | |
1796 | tasklet_kill(&local->tx_pending_tasklet); | |
1797 | tasklet_kill(&local->tasklet); | |
1798 | ||
1799 | rtnl_lock(); | |
1800 | ||
79010420 JB |
1801 | /* |
1802 | * At this point, interface list manipulations are fine | |
1803 | * because the driver cannot be handing us frames any | |
1804 | * more and the tasklet is killed. | |
1805 | */ | |
5b2812e9 | 1806 | |
75636525 JB |
1807 | /* First, we remove all virtual interfaces. */ |
1808 | ieee80211_remove_interfaces(local); | |
5b2812e9 JB |
1809 | |
1810 | /* then, finally, remove the master interface */ | |
3e122be0 | 1811 | unregister_netdevice(local->mdev); |
f0706e82 JB |
1812 | |
1813 | rtnl_unlock(); | |
1814 | ||
3e122be0 | 1815 | ieee80211_rx_bss_list_deinit(local); |
f0706e82 JB |
1816 | ieee80211_clear_tx_pending(local); |
1817 | sta_info_stop(local); | |
1818 | rate_control_deinitialize(local); | |
e9f207f0 | 1819 | debugfs_hw_del(local); |
f0706e82 | 1820 | |
f0706e82 JB |
1821 | if (skb_queue_len(&local->skb_queue) |
1822 | || skb_queue_len(&local->skb_queue_unreliable)) | |
1823 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 1824 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1825 | skb_queue_purge(&local->skb_queue); |
1826 | skb_queue_purge(&local->skb_queue_unreliable); | |
1827 | ||
1828 | destroy_workqueue(local->hw.workqueue); | |
1829 | wiphy_unregister(local->hw.wiphy); | |
1830 | ieee80211_wep_free(local); | |
1831 | ieee80211_led_exit(local); | |
3e122be0 | 1832 | free_netdev(local->mdev); |
f0706e82 JB |
1833 | } |
1834 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1835 | ||
1836 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1837 | { | |
1838 | struct ieee80211_local *local = hw_to_local(hw); | |
1839 | ||
f0706e82 JB |
1840 | wiphy_free(local->hw.wiphy); |
1841 | } | |
1842 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1843 | ||
f0706e82 JB |
1844 | static int __init ieee80211_init(void) |
1845 | { | |
1846 | struct sk_buff *skb; | |
1847 | int ret; | |
1848 | ||
e039fa4a JB |
1849 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1850 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
1851 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); | |
f0706e82 | 1852 | |
4b475898 | 1853 | ret = rc80211_pid_init(); |
ad018375 | 1854 | if (ret) |
d9357136 | 1855 | goto out; |
ac71c691 | 1856 | |
f0706e82 JB |
1857 | ret = ieee80211_wme_register(); |
1858 | if (ret) { | |
1859 | printk(KERN_DEBUG "ieee80211_init: failed to " | |
1860 | "initialize WME (err=%d)\n", ret); | |
3eadf5f4 | 1861 | goto out_cleanup_pid; |
f0706e82 JB |
1862 | } |
1863 | ||
e9f207f0 JB |
1864 | ieee80211_debugfs_netdev_init(); |
1865 | ||
f0706e82 | 1866 | return 0; |
ad018375 | 1867 | |
3eadf5f4 | 1868 | out_cleanup_pid: |
4b475898 | 1869 | rc80211_pid_exit(); |
3eadf5f4 | 1870 | out: |
ad018375 | 1871 | return ret; |
f0706e82 JB |
1872 | } |
1873 | ||
f0706e82 JB |
1874 | static void __exit ieee80211_exit(void) |
1875 | { | |
4b475898 | 1876 | rc80211_pid_exit(); |
ac71c691 | 1877 | |
3b96766f JB |
1878 | /* |
1879 | * For key todo, it'll be empty by now but the work | |
1880 | * might still be scheduled. | |
1881 | */ | |
1882 | flush_scheduled_work(); | |
1883 | ||
f7a92144 LCC |
1884 | if (mesh_allocated) |
1885 | ieee80211s_stop(); | |
902acc78 | 1886 | |
f0706e82 | 1887 | ieee80211_wme_unregister(); |
e9f207f0 | 1888 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1889 | } |
1890 | ||
1891 | ||
ca9938fe | 1892 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1893 | module_exit(ieee80211_exit); |
1894 | ||
1895 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1896 | MODULE_LICENSE("GPL"); |