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) { | |
b2c258fb JB |
108 | if (sdata->dev != dev && netif_running(sdata->dev)) { |
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) | |
b2c258fb JB |
129 | if (sdata->dev != dev && netif_running(sdata->dev)) |
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); | |
185 | struct ieee80211_if_init_conf conf; | |
186 | int res; | |
ceffefd1 | 187 | bool need_hw_reconfig = 0; |
44213b5e | 188 | struct sta_info *sta; |
f0706e82 | 189 | |
b2c258fb | 190 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0ec3ca44 | 191 | |
79010420 JB |
192 | /* we hold the RTNL here so can safely walk the list */ |
193 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
b2c258fb | 194 | struct net_device *ndev = nsdata->dev; |
e2ebc74d | 195 | |
665e8aaf JB |
196 | if (ndev != dev && ndev != local->mdev && netif_running(ndev)) { |
197 | /* | |
198 | * Allow only a single IBSS interface to be up at any | |
199 | * time. This is restricted because beacon distribution | |
200 | * cannot work properly if both are in the same IBSS. | |
201 | * | |
202 | * To remove this restriction we'd have to disallow them | |
203 | * from setting the same SSID on different IBSS interfaces | |
204 | * belonging to the same hardware. Then, however, we're | |
205 | * faced with having to adopt two different TSF timers... | |
206 | */ | |
207 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && | |
208 | nsdata->vif.type == IEEE80211_IF_TYPE_IBSS) | |
209 | return -EBUSY; | |
210 | ||
211 | /* | |
212 | * Disallow multiple IBSS/STA mode interfaces. | |
213 | * | |
214 | * This is a technical restriction, it is possible although | |
215 | * most likely not IEEE 802.11 compliant to have multiple | |
216 | * STAs with just a single hardware (the TSF timer will not | |
217 | * be adjusted properly.) | |
218 | * | |
219 | * However, because mac80211 uses the master device's BSS | |
220 | * information for each STA/IBSS interface, doing this will | |
221 | * currently corrupt that BSS information completely, unless, | |
222 | * a not very useful case, both STAs are associated to the | |
223 | * same BSS. | |
224 | * | |
225 | * To remove this restriction, the BSS information needs to | |
226 | * be embedded in the STA/IBSS mode sdata instead of using | |
227 | * the master device's BSS structure. | |
228 | */ | |
229 | if ((sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
230 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) && | |
231 | (nsdata->vif.type == IEEE80211_IF_TYPE_STA || | |
232 | nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)) | |
233 | return -EBUSY; | |
234 | ||
235 | /* | |
236 | * The remaining checks are only performed for interfaces | |
237 | * with the same MAC address. | |
238 | */ | |
239 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
240 | continue; | |
241 | ||
0ec3ca44 JB |
242 | /* |
243 | * check whether it may have the same address | |
244 | */ | |
51fb61e7 JB |
245 | if (!identical_mac_addr_allowed(sdata->vif.type, |
246 | nsdata->vif.type)) | |
0ec3ca44 | 247 | return -ENOTUNIQ; |
0ec3ca44 JB |
248 | |
249 | /* | |
250 | * can only add VLANs to enabled APs | |
251 | */ | |
51fb61e7 | 252 | if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN && |
665e8aaf | 253 | nsdata->vif.type == IEEE80211_IF_TYPE_AP) |
0ec3ca44 | 254 | sdata->u.vlan.ap = nsdata; |
b2c258fb JB |
255 | } |
256 | } | |
f0706e82 | 257 | |
51fb61e7 | 258 | switch (sdata->vif.type) { |
0ec3ca44 | 259 | case IEEE80211_IF_TYPE_WDS: |
e94e1068 | 260 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) |
0ec3ca44 JB |
261 | return -ENOLINK; |
262 | break; | |
263 | case IEEE80211_IF_TYPE_VLAN: | |
264 | if (!sdata->u.vlan.ap) | |
265 | return -ENOLINK; | |
266 | break; | |
fb1c1cd6 | 267 | case IEEE80211_IF_TYPE_AP: |
fb1c1cd6 JB |
268 | case IEEE80211_IF_TYPE_STA: |
269 | case IEEE80211_IF_TYPE_MNTR: | |
270 | case IEEE80211_IF_TYPE_IBSS: | |
6032f934 | 271 | case IEEE80211_IF_TYPE_MESH_POINT: |
fb1c1cd6 JB |
272 | /* no special treatment */ |
273 | break; | |
a2897552 JB |
274 | case IEEE80211_IF_TYPE_INVALID: |
275 | /* cannot happen */ | |
276 | WARN_ON(1); | |
277 | break; | |
0ec3ca44 | 278 | } |
f0706e82 | 279 | |
b2c258fb JB |
280 | if (local->open_count == 0) { |
281 | res = 0; | |
4150c572 JB |
282 | if (local->ops->start) |
283 | res = local->ops->start(local_to_hw(local)); | |
284 | if (res) | |
b2c258fb | 285 | return res; |
ceffefd1 | 286 | need_hw_reconfig = 1; |
cdcb006f | 287 | ieee80211_led_radio(local, local->hw.conf.radio_enabled); |
b2c258fb | 288 | } |
f0706e82 | 289 | |
51fb61e7 | 290 | switch (sdata->vif.type) { |
0ec3ca44 JB |
291 | case IEEE80211_IF_TYPE_VLAN: |
292 | list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans); | |
293 | /* no need to tell driver */ | |
294 | break; | |
4150c572 | 295 | case IEEE80211_IF_TYPE_MNTR: |
3d30d949 MW |
296 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
297 | local->cooked_mntrs++; | |
298 | break; | |
299 | } | |
300 | ||
4150c572 | 301 | /* must be before the call to ieee80211_configure_filter */ |
b2c258fb | 302 | local->monitors++; |
8cc9a739 | 303 | if (local->monitors == 1) |
4150c572 | 304 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
8cc9a739 MW |
305 | |
306 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
307 | local->fif_fcsfail++; | |
308 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
309 | local->fif_plcpfail++; | |
310 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
311 | local->fif_control++; | |
312 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
313 | local->fif_other_bss++; | |
314 | ||
315 | netif_tx_lock_bh(local->mdev); | |
316 | ieee80211_configure_filter(local); | |
317 | netif_tx_unlock_bh(local->mdev); | |
4150c572 JB |
318 | break; |
319 | case IEEE80211_IF_TYPE_STA: | |
320 | case IEEE80211_IF_TYPE_IBSS: | |
321 | sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
322 | /* fall through */ | |
323 | default: | |
32bfd35d | 324 | conf.vif = &sdata->vif; |
51fb61e7 | 325 | conf.type = sdata->vif.type; |
4150c572 JB |
326 | conf.mac_addr = dev->dev_addr; |
327 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
4150c572 | 328 | if (res) |
636c5d48 | 329 | goto err_stop; |
4150c572 | 330 | |
b2c258fb | 331 | ieee80211_if_config(dev); |
d9430a32 | 332 | ieee80211_reset_erp_info(dev); |
11a843b7 | 333 | ieee80211_enable_keys(sdata); |
4150c572 | 334 | |
51fb61e7 | 335 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
ddd3d2be | 336 | !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) |
4150c572 JB |
337 | netif_carrier_off(dev); |
338 | else | |
339 | netif_carrier_on(dev); | |
d9430a32 | 340 | } |
f0706e82 | 341 | |
636c5d48 JB |
342 | if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) { |
343 | /* Create STA entry for the WDS peer */ | |
344 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
345 | GFP_KERNEL); | |
346 | if (!sta) { | |
347 | res = -ENOMEM; | |
348 | goto err_del_interface; | |
349 | } | |
350 | ||
07346f81 | 351 | /* no locking required since STA is not live yet */ |
636c5d48 JB |
352 | sta->flags |= WLAN_STA_AUTHORIZED; |
353 | ||
354 | res = sta_info_insert(sta); | |
355 | if (res) { | |
356 | /* STA has been freed */ | |
357 | goto err_del_interface; | |
358 | } | |
359 | } | |
360 | ||
4150c572 JB |
361 | if (local->open_count == 0) { |
362 | res = dev_open(local->mdev); | |
363 | WARN_ON(res); | |
636c5d48 JB |
364 | if (res) |
365 | goto err_del_interface; | |
4150c572 JB |
366 | tasklet_enable(&local->tx_pending_tasklet); |
367 | tasklet_enable(&local->tasklet); | |
368 | } | |
369 | ||
c1428b3f JB |
370 | /* |
371 | * set_multicast_list will be invoked by the networking core | |
372 | * which will check whether any increments here were done in | |
373 | * error and sync them down to the hardware as filter flags. | |
374 | */ | |
375 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
376 | atomic_inc(&local->iff_allmultis); | |
377 | ||
378 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
379 | atomic_inc(&local->iff_promiscs); | |
380 | ||
4150c572 | 381 | local->open_count++; |
ceffefd1 MB |
382 | if (need_hw_reconfig) |
383 | ieee80211_hw_config(local); | |
f0706e82 | 384 | |
64f851e4 JN |
385 | /* |
386 | * ieee80211_sta_work is disabled while network interface | |
387 | * is down. Therefore, some configuration changes may not | |
388 | * yet be effective. Trigger execution of ieee80211_sta_work | |
389 | * to fix this. | |
390 | */ | |
988c0f72 JB |
391 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || |
392 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { | |
64f851e4 JN |
393 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
394 | queue_work(local->hw.workqueue, &ifsta->work); | |
395 | } | |
396 | ||
b2c258fb | 397 | netif_start_queue(dev); |
4150c572 | 398 | |
b2c258fb | 399 | return 0; |
636c5d48 JB |
400 | err_del_interface: |
401 | local->ops->remove_interface(local_to_hw(local), &conf); | |
402 | err_stop: | |
403 | if (!local->open_count && local->ops->stop) | |
404 | local->ops->stop(local_to_hw(local)); | |
405 | return res; | |
f0706e82 | 406 | } |
f0706e82 | 407 | |
4150c572 | 408 | static int ieee80211_stop(struct net_device *dev) |
f0706e82 | 409 | { |
44213b5e JB |
410 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
411 | struct ieee80211_local *local = sdata->local; | |
4150c572 | 412 | struct ieee80211_if_init_conf conf; |
07db2183 | 413 | struct sta_info *sta; |
4150c572 | 414 | |
44213b5e JB |
415 | /* |
416 | * Stop TX on this interface first. | |
417 | */ | |
418 | netif_stop_queue(dev); | |
4150c572 | 419 | |
44213b5e JB |
420 | /* |
421 | * Now delete all active aggregation sessions. | |
422 | */ | |
d0709a65 JB |
423 | rcu_read_lock(); |
424 | ||
425 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
426 | if (sta->sdata == sdata) | |
85249e5f | 427 | ieee80211_sta_tear_down_BA_sessions(dev, sta->addr); |
07db2183 RR |
428 | } |
429 | ||
d0709a65 JB |
430 | rcu_read_unlock(); |
431 | ||
44213b5e JB |
432 | /* |
433 | * Remove all stations associated with this interface. | |
434 | * | |
435 | * This must be done before calling ops->remove_interface() | |
436 | * because otherwise we can later invoke ops->sta_notify() | |
437 | * whenever the STAs are removed, and that invalidates driver | |
438 | * assumptions about always getting a vif pointer that is valid | |
439 | * (because if we remove a STA after ops->remove_interface() | |
440 | * the driver will have removed the vif info already!) | |
441 | * | |
442 | * We could relax this and only unlink the stations from the | |
443 | * hash table and list but keep them on a per-sdata list that | |
444 | * will be inserted back again when the interface is brought | |
445 | * up again, but I don't currently see a use case for that, | |
446 | * except with WDS which gets a STA entry created when it is | |
447 | * brought up. | |
448 | */ | |
449 | sta_info_flush(local, sdata); | |
4150c572 | 450 | |
c1428b3f JB |
451 | /* |
452 | * Don't count this interface for promisc/allmulti while it | |
453 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
454 | * on the master interface which will sync these down to the | |
455 | * hardware as filter flags. | |
456 | */ | |
457 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
458 | atomic_dec(&local->iff_allmultis); | |
459 | ||
460 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
461 | atomic_dec(&local->iff_promiscs); | |
462 | ||
4150c572 JB |
463 | dev_mc_unsync(local->mdev, dev); |
464 | ||
5dfdaf58 | 465 | /* APs need special treatment */ |
51fb61e7 | 466 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { |
0ec3ca44 | 467 | struct ieee80211_sub_if_data *vlan, *tmp; |
5dfdaf58 | 468 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
0ec3ca44 | 469 | |
5dfdaf58 JB |
470 | /* remove beacon */ |
471 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
472 | synchronize_rcu(); | |
473 | kfree(old_beacon); | |
474 | ||
475 | /* down all dependent devices, that is VLANs */ | |
0ec3ca44 JB |
476 | list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, |
477 | u.vlan.list) | |
478 | dev_close(vlan->dev); | |
479 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
480 | } | |
481 | ||
4150c572 | 482 | local->open_count--; |
f0706e82 | 483 | |
51fb61e7 | 484 | switch (sdata->vif.type) { |
0ec3ca44 JB |
485 | case IEEE80211_IF_TYPE_VLAN: |
486 | list_del(&sdata->u.vlan.list); | |
487 | sdata->u.vlan.ap = NULL; | |
488 | /* no need to tell driver */ | |
489 | break; | |
4150c572 | 490 | case IEEE80211_IF_TYPE_MNTR: |
3d30d949 MW |
491 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { |
492 | local->cooked_mntrs--; | |
493 | break; | |
494 | } | |
495 | ||
4150c572 | 496 | local->monitors--; |
8cc9a739 | 497 | if (local->monitors == 0) |
8b393f1d | 498 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
8cc9a739 MW |
499 | |
500 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
501 | local->fif_fcsfail--; | |
502 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
503 | local->fif_plcpfail--; | |
504 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
505 | local->fif_control--; | |
506 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
507 | local->fif_other_bss--; | |
508 | ||
509 | netif_tx_lock_bh(local->mdev); | |
510 | ieee80211_configure_filter(local); | |
511 | netif_tx_unlock_bh(local->mdev); | |
4150c572 | 512 | break; |
f7a92144 | 513 | case IEEE80211_IF_TYPE_MESH_POINT: |
b2c258fb JB |
514 | case IEEE80211_IF_TYPE_STA: |
515 | case IEEE80211_IF_TYPE_IBSS: | |
516 | sdata->u.sta.state = IEEE80211_DISABLED; | |
ad81b2f9 | 517 | memset(sdata->u.sta.bssid, 0, ETH_ALEN); |
b2c258fb | 518 | del_timer_sync(&sdata->u.sta.timer); |
2a8a9a88 | 519 | /* |
79010420 JB |
520 | * When we get here, the interface is marked down. |
521 | * Call synchronize_rcu() to wait for the RX path | |
522 | * should it be using the interface and enqueuing | |
523 | * frames at this very time on another CPU. | |
2a8a9a88 | 524 | */ |
79010420 | 525 | synchronize_rcu(); |
b2c258fb | 526 | skb_queue_purge(&sdata->u.sta.skb_queue); |
2a8a9a88 | 527 | |
ece8eddd ZY |
528 | if (local->scan_dev == sdata->dev) { |
529 | if (!local->ops->hw_scan) { | |
530 | local->sta_sw_scanning = 0; | |
531 | cancel_delayed_work(&local->scan_work); | |
532 | } else | |
533 | local->sta_hw_scanning = 0; | |
b2c258fb | 534 | } |
ece8eddd | 535 | |
b2c258fb | 536 | flush_workqueue(local->hw.workqueue); |
a10605e5 ZY |
537 | |
538 | sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED; | |
539 | kfree(sdata->u.sta.extra_ie); | |
540 | sdata->u.sta.extra_ie = NULL; | |
541 | sdata->u.sta.extra_ie_len = 0; | |
4150c572 JB |
542 | /* fall through */ |
543 | default: | |
32bfd35d | 544 | conf.vif = &sdata->vif; |
51fb61e7 | 545 | conf.type = sdata->vif.type; |
4150c572 | 546 | conf.mac_addr = dev->dev_addr; |
11a843b7 JB |
547 | /* disable all keys for as long as this netdev is down */ |
548 | ieee80211_disable_keys(sdata); | |
4150c572 | 549 | local->ops->remove_interface(local_to_hw(local), &conf); |
f0706e82 JB |
550 | } |
551 | ||
b2c258fb JB |
552 | if (local->open_count == 0) { |
553 | if (netif_running(local->mdev)) | |
554 | dev_close(local->mdev); | |
4150c572 | 555 | |
b2c258fb JB |
556 | if (local->ops->stop) |
557 | local->ops->stop(local_to_hw(local)); | |
4150c572 | 558 | |
cdcb006f ID |
559 | ieee80211_led_radio(local, 0); |
560 | ||
b2c258fb JB |
561 | tasklet_disable(&local->tx_pending_tasklet); |
562 | tasklet_disable(&local->tasklet); | |
563 | } | |
b2c258fb | 564 | |
f0706e82 JB |
565 | return 0; |
566 | } | |
567 | ||
eadc8d9e RR |
568 | int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid) |
569 | { | |
570 | struct ieee80211_local *local = hw_to_local(hw); | |
571 | struct sta_info *sta; | |
572 | struct ieee80211_sub_if_data *sdata; | |
573 | u16 start_seq_num = 0; | |
574 | u8 *state; | |
575 | int ret; | |
576 | DECLARE_MAC_BUF(mac); | |
577 | ||
578 | if (tid >= STA_TID_NUM) | |
579 | return -EINVAL; | |
580 | ||
581 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
582 | printk(KERN_DEBUG "Open BA session requested for %s tid %u\n", | |
583 | print_mac(mac, ra), tid); | |
584 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
585 | ||
d0709a65 JB |
586 | rcu_read_lock(); |
587 | ||
eadc8d9e RR |
588 | sta = sta_info_get(local, ra); |
589 | if (!sta) { | |
f4ea83dd | 590 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 591 | printk(KERN_DEBUG "Could not find the station\n"); |
f4ea83dd | 592 | #endif |
b83f4e15 TW |
593 | ret = -ENOENT; |
594 | goto exit; | |
eadc8d9e RR |
595 | } |
596 | ||
07346f81 | 597 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
598 | |
599 | /* we have tried too many times, receiver does not want A-MPDU */ | |
cee24a3e | 600 | if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { |
eadc8d9e | 601 | ret = -EBUSY; |
b83f4e15 | 602 | goto err_unlock_sta; |
eadc8d9e RR |
603 | } |
604 | ||
cee24a3e | 605 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e RR |
606 | /* check if the TID is not in aggregation flow already */ |
607 | if (*state != HT_AGG_STATE_IDLE) { | |
608 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
609 | printk(KERN_DEBUG "BA request denied - session is not " | |
610 | "idle on tid %u\n", tid); | |
611 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
612 | ret = -EAGAIN; | |
b83f4e15 | 613 | goto err_unlock_sta; |
eadc8d9e RR |
614 | } |
615 | ||
cee24a3e RR |
616 | /* prepare A-MPDU MLME for Tx aggregation */ |
617 | sta->ampdu_mlme.tid_tx[tid] = | |
618 | kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); | |
619 | if (!sta->ampdu_mlme.tid_tx[tid]) { | |
f4ea83dd | 620 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
621 | if (net_ratelimit()) |
622 | printk(KERN_ERR "allocate tx mlme to tid %d failed\n", | |
623 | tid); | |
f4ea83dd | 624 | #endif |
cee24a3e | 625 | ret = -ENOMEM; |
b83f4e15 | 626 | goto err_unlock_sta; |
cee24a3e RR |
627 | } |
628 | /* Tx timer */ | |
629 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function = | |
630 | sta_addba_resp_timer_expired; | |
631 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data = | |
632 | (unsigned long)&sta->timer_to_tid[tid]; | |
633 | init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); | |
634 | ||
eadc8d9e RR |
635 | /* ensure that TX flow won't interrupt us |
636 | * until the end of the call to requeue function */ | |
637 | spin_lock_bh(&local->mdev->queue_lock); | |
638 | ||
639 | /* create a new queue for this aggregation */ | |
9e723492 | 640 | ret = ieee80211_ht_agg_queue_add(local, sta, tid); |
eadc8d9e RR |
641 | |
642 | /* case no queue is available to aggregation | |
643 | * don't switch to aggregation */ | |
644 | if (ret) { | |
645 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
cee24a3e | 646 | printk(KERN_DEBUG "BA request denied - queue unavailable for" |
eadc8d9e RR |
647 | " tid %d\n", tid); |
648 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
b83f4e15 | 649 | goto err_unlock_queue; |
eadc8d9e | 650 | } |
d0709a65 | 651 | sdata = sta->sdata; |
eadc8d9e RR |
652 | |
653 | /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the | |
654 | * call back right away, it must see that the flow has begun */ | |
655 | *state |= HT_ADDBA_REQUESTED_MSK; | |
656 | ||
657 | if (local->ops->ampdu_action) | |
658 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START, | |
659 | ra, tid, &start_seq_num); | |
660 | ||
661 | if (ret) { | |
662 | /* No need to requeue the packets in the agg queue, since we | |
663 | * held the tx lock: no packet could be enqueued to the newly | |
664 | * allocated queue */ | |
9e723492 | 665 | ieee80211_ht_agg_queue_remove(local, sta, tid, 0); |
eadc8d9e | 666 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
667 | printk(KERN_DEBUG "BA request denied - HW unavailable for" |
668 | " tid %d\n", tid); | |
eadc8d9e | 669 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
eadc8d9e | 670 | *state = HT_AGG_STATE_IDLE; |
b83f4e15 | 671 | goto err_unlock_queue; |
eadc8d9e RR |
672 | } |
673 | ||
674 | /* Will put all the packets in the new SW queue */ | |
9e723492 | 675 | ieee80211_requeue(local, ieee802_1d_to_ac[tid]); |
eadc8d9e | 676 | spin_unlock_bh(&local->mdev->queue_lock); |
b83f4e15 | 677 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 678 | |
eadc8d9e RR |
679 | /* send an addBA request */ |
680 | sta->ampdu_mlme.dialog_token_allocator++; | |
cee24a3e | 681 | sta->ampdu_mlme.tid_tx[tid]->dialog_token = |
eadc8d9e | 682 | sta->ampdu_mlme.dialog_token_allocator; |
cee24a3e | 683 | sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num; |
eadc8d9e | 684 | |
b83f4e15 | 685 | |
d0709a65 | 686 | ieee80211_send_addba_request(sta->sdata->dev, ra, tid, |
cee24a3e RR |
687 | sta->ampdu_mlme.tid_tx[tid]->dialog_token, |
688 | sta->ampdu_mlme.tid_tx[tid]->ssn, | |
eadc8d9e | 689 | 0x40, 5000); |
eadc8d9e | 690 | /* activate the timer for the recipient's addBA response */ |
cee24a3e | 691 | sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires = |
eadc8d9e | 692 | jiffies + ADDBA_RESP_INTERVAL; |
cee24a3e | 693 | add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
f4ea83dd | 694 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 695 | printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid); |
f4ea83dd | 696 | #endif |
b83f4e15 | 697 | goto exit; |
eadc8d9e | 698 | |
b83f4e15 | 699 | err_unlock_queue: |
cee24a3e RR |
700 | kfree(sta->ampdu_mlme.tid_tx[tid]); |
701 | sta->ampdu_mlme.tid_tx[tid] = NULL; | |
702 | spin_unlock_bh(&local->mdev->queue_lock); | |
703 | ret = -EBUSY; | |
b83f4e15 | 704 | err_unlock_sta: |
07346f81 | 705 | spin_unlock_bh(&sta->lock); |
b83f4e15 | 706 | exit: |
d0709a65 | 707 | rcu_read_unlock(); |
eadc8d9e RR |
708 | return ret; |
709 | } | |
710 | EXPORT_SYMBOL(ieee80211_start_tx_ba_session); | |
711 | ||
712 | int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, | |
713 | u8 *ra, u16 tid, | |
714 | enum ieee80211_back_parties initiator) | |
715 | { | |
716 | struct ieee80211_local *local = hw_to_local(hw); | |
717 | struct sta_info *sta; | |
718 | u8 *state; | |
719 | int ret = 0; | |
720 | DECLARE_MAC_BUF(mac); | |
721 | ||
722 | if (tid >= STA_TID_NUM) | |
723 | return -EINVAL; | |
724 | ||
d0709a65 | 725 | rcu_read_lock(); |
eadc8d9e | 726 | sta = sta_info_get(local, ra); |
d0709a65 JB |
727 | if (!sta) { |
728 | rcu_read_unlock(); | |
eadc8d9e | 729 | return -ENOENT; |
d0709a65 | 730 | } |
eadc8d9e RR |
731 | |
732 | /* check if the TID is in aggregation */ | |
cee24a3e | 733 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 734 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
735 | |
736 | if (*state != HT_AGG_STATE_OPERATIONAL) { | |
eadc8d9e RR |
737 | ret = -ENOENT; |
738 | goto stop_BA_exit; | |
739 | } | |
740 | ||
513a1025 RR |
741 | #ifdef CONFIG_MAC80211_HT_DEBUG |
742 | printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n", | |
743 | print_mac(mac, ra), tid); | |
744 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
745 | ||
eadc8d9e RR |
746 | ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]); |
747 | ||
748 | *state = HT_AGG_STATE_REQ_STOP_BA_MSK | | |
749 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
750 | ||
751 | if (local->ops->ampdu_action) | |
752 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP, | |
753 | ra, tid, NULL); | |
754 | ||
755 | /* case HW denied going back to legacy */ | |
756 | if (ret) { | |
757 | WARN_ON(ret != -EBUSY); | |
758 | *state = HT_AGG_STATE_OPERATIONAL; | |
759 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); | |
760 | goto stop_BA_exit; | |
761 | } | |
762 | ||
763 | stop_BA_exit: | |
07346f81 | 764 | spin_unlock_bh(&sta->lock); |
d0709a65 | 765 | rcu_read_unlock(); |
eadc8d9e RR |
766 | return ret; |
767 | } | |
768 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); | |
769 | ||
770 | void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid) | |
771 | { | |
772 | struct ieee80211_local *local = hw_to_local(hw); | |
773 | struct sta_info *sta; | |
774 | u8 *state; | |
775 | DECLARE_MAC_BUF(mac); | |
776 | ||
777 | if (tid >= STA_TID_NUM) { | |
f4ea83dd | 778 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
779 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", |
780 | tid, STA_TID_NUM); | |
f4ea83dd | 781 | #endif |
eadc8d9e RR |
782 | return; |
783 | } | |
784 | ||
d0709a65 | 785 | rcu_read_lock(); |
eadc8d9e RR |
786 | sta = sta_info_get(local, ra); |
787 | if (!sta) { | |
d0709a65 | 788 | rcu_read_unlock(); |
f4ea83dd | 789 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
790 | printk(KERN_DEBUG "Could not find station: %s\n", |
791 | print_mac(mac, ra)); | |
f4ea83dd | 792 | #endif |
eadc8d9e RR |
793 | return; |
794 | } | |
795 | ||
cee24a3e | 796 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
07346f81 | 797 | spin_lock_bh(&sta->lock); |
eadc8d9e RR |
798 | |
799 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { | |
f4ea83dd | 800 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
801 | printk(KERN_DEBUG "addBA was not requested yet, state is %d\n", |
802 | *state); | |
f4ea83dd | 803 | #endif |
07346f81 | 804 | spin_unlock_bh(&sta->lock); |
d0709a65 | 805 | rcu_read_unlock(); |
eadc8d9e RR |
806 | return; |
807 | } | |
808 | ||
809 | WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK); | |
810 | ||
811 | *state |= HT_ADDBA_DRV_READY_MSK; | |
812 | ||
813 | if (*state == HT_AGG_STATE_OPERATIONAL) { | |
f4ea83dd | 814 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 815 | printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid); |
f4ea83dd | 816 | #endif |
eadc8d9e RR |
817 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); |
818 | } | |
07346f81 | 819 | spin_unlock_bh(&sta->lock); |
d0709a65 | 820 | rcu_read_unlock(); |
eadc8d9e RR |
821 | } |
822 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb); | |
823 | ||
824 | void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid) | |
825 | { | |
826 | struct ieee80211_local *local = hw_to_local(hw); | |
827 | struct sta_info *sta; | |
828 | u8 *state; | |
829 | int agg_queue; | |
830 | DECLARE_MAC_BUF(mac); | |
831 | ||
832 | if (tid >= STA_TID_NUM) { | |
f4ea83dd | 833 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
834 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", |
835 | tid, STA_TID_NUM); | |
f4ea83dd | 836 | #endif |
eadc8d9e RR |
837 | return; |
838 | } | |
839 | ||
513a1025 RR |
840 | #ifdef CONFIG_MAC80211_HT_DEBUG |
841 | printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n", | |
eadc8d9e | 842 | print_mac(mac, ra), tid); |
513a1025 | 843 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
eadc8d9e | 844 | |
d0709a65 | 845 | rcu_read_lock(); |
eadc8d9e RR |
846 | sta = sta_info_get(local, ra); |
847 | if (!sta) { | |
f4ea83dd | 848 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
849 | printk(KERN_DEBUG "Could not find station: %s\n", |
850 | print_mac(mac, ra)); | |
f4ea83dd | 851 | #endif |
d0709a65 | 852 | rcu_read_unlock(); |
eadc8d9e RR |
853 | return; |
854 | } | |
cee24a3e | 855 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 856 | |
b83f4e15 TW |
857 | /* NOTE: no need to use sta->lock in this state check, as |
858 | * ieee80211_stop_tx_ba_session will let only | |
859 | * one stop call to pass through per sta/tid */ | |
eadc8d9e | 860 | if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) { |
f4ea83dd | 861 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 862 | printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n"); |
f4ea83dd | 863 | #endif |
d0709a65 | 864 | rcu_read_unlock(); |
eadc8d9e RR |
865 | return; |
866 | } | |
867 | ||
868 | if (*state & HT_AGG_STATE_INITIATOR_MSK) | |
d0709a65 | 869 | ieee80211_send_delba(sta->sdata->dev, ra, tid, |
eadc8d9e RR |
870 | WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); |
871 | ||
872 | agg_queue = sta->tid_to_tx_q[tid]; | |
873 | ||
874 | /* avoid ordering issues: we are the only one that can modify | |
875 | * the content of the qdiscs */ | |
876 | spin_lock_bh(&local->mdev->queue_lock); | |
877 | /* remove the queue for this aggregation */ | |
9e723492 | 878 | ieee80211_ht_agg_queue_remove(local, sta, tid, 1); |
eadc8d9e RR |
879 | spin_unlock_bh(&local->mdev->queue_lock); |
880 | ||
881 | /* we just requeued the all the frames that were in the removed | |
882 | * queue, and since we might miss a softirq we do netif_schedule. | |
883 | * ieee80211_wake_queue is not used here as this queue is not | |
884 | * necessarily stopped */ | |
885 | netif_schedule(local->mdev); | |
b83f4e15 | 886 | spin_lock_bh(&sta->lock); |
eadc8d9e | 887 | *state = HT_AGG_STATE_IDLE; |
cee24a3e RR |
888 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
889 | kfree(sta->ampdu_mlme.tid_tx[tid]); | |
890 | sta->ampdu_mlme.tid_tx[tid] = NULL; | |
07346f81 | 891 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 892 | |
d0709a65 | 893 | rcu_read_unlock(); |
eadc8d9e RR |
894 | } |
895 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb); | |
896 | ||
897 | void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, | |
898 | const u8 *ra, u16 tid) | |
899 | { | |
900 | struct ieee80211_local *local = hw_to_local(hw); | |
901 | struct ieee80211_ra_tid *ra_tid; | |
902 | struct sk_buff *skb = dev_alloc_skb(0); | |
903 | ||
904 | if (unlikely(!skb)) { | |
f4ea83dd | 905 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
906 | if (net_ratelimit()) |
907 | printk(KERN_WARNING "%s: Not enough memory, " | |
908 | "dropping start BA session", skb->dev->name); | |
f4ea83dd | 909 | #endif |
eadc8d9e RR |
910 | return; |
911 | } | |
912 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
913 | memcpy(&ra_tid->ra, ra, ETH_ALEN); | |
914 | ra_tid->tid = tid; | |
915 | ||
916 | skb->pkt_type = IEEE80211_ADDBA_MSG; | |
917 | skb_queue_tail(&local->skb_queue, skb); | |
918 | tasklet_schedule(&local->tasklet); | |
919 | } | |
920 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); | |
921 | ||
922 | void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, | |
923 | const u8 *ra, u16 tid) | |
924 | { | |
925 | struct ieee80211_local *local = hw_to_local(hw); | |
926 | struct ieee80211_ra_tid *ra_tid; | |
927 | struct sk_buff *skb = dev_alloc_skb(0); | |
928 | ||
929 | if (unlikely(!skb)) { | |
f4ea83dd | 930 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
931 | if (net_ratelimit()) |
932 | printk(KERN_WARNING "%s: Not enough memory, " | |
933 | "dropping stop BA session", skb->dev->name); | |
f4ea83dd | 934 | #endif |
eadc8d9e RR |
935 | return; |
936 | } | |
937 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
938 | memcpy(&ra_tid->ra, ra, ETH_ALEN); | |
939 | ra_tid->tid = tid; | |
940 | ||
941 | skb->pkt_type = IEEE80211_DELBA_MSG; | |
942 | skb_queue_tail(&local->skb_queue, skb); | |
943 | tasklet_schedule(&local->tasklet); | |
944 | } | |
945 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); | |
946 | ||
f0706e82 JB |
947 | static void ieee80211_set_multicast_list(struct net_device *dev) |
948 | { | |
949 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
950 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4150c572 | 951 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
f0706e82 | 952 | |
4150c572 JB |
953 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
954 | promisc = !!(dev->flags & IFF_PROMISC); | |
b52f2198 JB |
955 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
956 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
4150c572 JB |
957 | |
958 | if (allmulti != sdata_allmulti) { | |
959 | if (dev->flags & IFF_ALLMULTI) | |
53918994 | 960 | atomic_inc(&local->iff_allmultis); |
4150c572 | 961 | else |
53918994 | 962 | atomic_dec(&local->iff_allmultis); |
13262ffd | 963 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
f0706e82 | 964 | } |
4150c572 JB |
965 | |
966 | if (promisc != sdata_promisc) { | |
967 | if (dev->flags & IFF_PROMISC) | |
53918994 | 968 | atomic_inc(&local->iff_promiscs); |
4150c572 | 969 | else |
53918994 | 970 | atomic_dec(&local->iff_promiscs); |
13262ffd | 971 | sdata->flags ^= IEEE80211_SDATA_PROMISC; |
f0706e82 | 972 | } |
4150c572 JB |
973 | |
974 | dev_mc_sync(local->mdev, dev); | |
f0706e82 JB |
975 | } |
976 | ||
3b04ddde SH |
977 | static const struct header_ops ieee80211_header_ops = { |
978 | .create = eth_header, | |
979 | .parse = header_parse_80211, | |
980 | .rebuild = eth_rebuild_header, | |
981 | .cache = eth_header_cache, | |
982 | .cache_update = eth_header_cache_update, | |
983 | }; | |
984 | ||
f9d540ee | 985 | /* Must not be called for mdev */ |
b2c258fb | 986 | void ieee80211_if_setup(struct net_device *dev) |
f0706e82 | 987 | { |
b2c258fb JB |
988 | ether_setup(dev); |
989 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
990 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
991 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
992 | dev->change_mtu = ieee80211_change_mtu; | |
b2c258fb JB |
993 | dev->open = ieee80211_open; |
994 | dev->stop = ieee80211_stop; | |
b2c258fb JB |
995 | dev->destructor = ieee80211_if_free; |
996 | } | |
f0706e82 | 997 | |
b2c258fb JB |
998 | /* everything else */ |
999 | ||
b2c258fb | 1000 | static int __ieee80211_if_config(struct net_device *dev, |
e039fa4a | 1001 | struct sk_buff *beacon) |
b2c258fb JB |
1002 | { |
1003 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1004 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1005 | struct ieee80211_if_conf conf; | |
b2c258fb JB |
1006 | |
1007 | if (!local->ops->config_interface || !netif_running(dev)) | |
f0706e82 | 1008 | return 0; |
f0706e82 | 1009 | |
b2c258fb | 1010 | memset(&conf, 0, sizeof(conf)); |
51fb61e7 JB |
1011 | conf.type = sdata->vif.type; |
1012 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
1013 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { | |
4150c572 | 1014 | conf.bssid = sdata->u.sta.bssid; |
b2c258fb JB |
1015 | conf.ssid = sdata->u.sta.ssid; |
1016 | conf.ssid_len = sdata->u.sta.ssid_len; | |
902acc78 | 1017 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
f7a92144 LCC |
1018 | conf.beacon = beacon; |
1019 | ieee80211_start_mesh(dev); | |
51fb61e7 | 1020 | } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { |
b2c258fb JB |
1021 | conf.ssid = sdata->u.ap.ssid; |
1022 | conf.ssid_len = sdata->u.ap.ssid_len; | |
b2c258fb | 1023 | conf.beacon = beacon; |
f0706e82 | 1024 | } |
b2c258fb | 1025 | return local->ops->config_interface(local_to_hw(local), |
32bfd35d | 1026 | &sdata->vif, &conf); |
f0706e82 JB |
1027 | } |
1028 | ||
b2c258fb JB |
1029 | int ieee80211_if_config(struct net_device *dev) |
1030 | { | |
f7a92144 LCC |
1031 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1032 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1033 | if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT && | |
1034 | (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) | |
1035 | return ieee80211_if_config_beacon(dev); | |
e039fa4a | 1036 | return __ieee80211_if_config(dev, NULL); |
b2c258fb | 1037 | } |
f0706e82 | 1038 | |
b2c258fb | 1039 | int ieee80211_if_config_beacon(struct net_device *dev) |
f0706e82 | 1040 | { |
f0706e82 | 1041 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
32bfd35d | 1042 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b2c258fb | 1043 | struct sk_buff *skb; |
f0706e82 | 1044 | |
b2c258fb | 1045 | if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) |
f0706e82 | 1046 | return 0; |
e039fa4a | 1047 | skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif); |
b2c258fb JB |
1048 | if (!skb) |
1049 | return -ENOMEM; | |
e039fa4a | 1050 | return __ieee80211_if_config(dev, skb); |
b2c258fb | 1051 | } |
f0706e82 | 1052 | |
b2c258fb JB |
1053 | int ieee80211_hw_config(struct ieee80211_local *local) |
1054 | { | |
b2c258fb JB |
1055 | struct ieee80211_channel *chan; |
1056 | int ret = 0; | |
f0706e82 | 1057 | |
8318d78a | 1058 | if (local->sta_sw_scanning) |
b2c258fb | 1059 | chan = local->scan_channel; |
8318d78a | 1060 | else |
b2c258fb | 1061 | chan = local->oper_channel; |
f0706e82 | 1062 | |
8318d78a JB |
1063 | local->hw.conf.channel = chan; |
1064 | ||
1065 | if (!local->hw.conf.power_level) | |
1066 | local->hw.conf.power_level = chan->max_power; | |
1067 | else | |
1068 | local->hw.conf.power_level = min(chan->max_power, | |
1069 | local->hw.conf.power_level); | |
1070 | ||
1071 | local->hw.conf.max_antenna_gain = chan->max_antenna_gain; | |
f0706e82 | 1072 | |
b2c258fb | 1073 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
8318d78a JB |
1074 | printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n", |
1075 | wiphy_name(local->hw.wiphy), chan->center_freq); | |
1076 | #endif | |
b2c258fb | 1077 | |
f7c4daed | 1078 | if (local->open_count) |
b2c258fb | 1079 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); |
f0706e82 | 1080 | |
b2c258fb JB |
1081 | return ret; |
1082 | } | |
f0706e82 | 1083 | |
d3c990fb | 1084 | /** |
38668c05 TW |
1085 | * ieee80211_handle_ht should be used only after legacy configuration |
1086 | * has been determined namely band, as ht configuration depends upon | |
1087 | * the hardware's HT abilities for a _specific_ band. | |
d3c990fb | 1088 | */ |
38668c05 | 1089 | u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht, |
d3c990fb RR |
1090 | struct ieee80211_ht_info *req_ht_cap, |
1091 | struct ieee80211_ht_bss_info *req_bss_cap) | |
1092 | { | |
1093 | struct ieee80211_conf *conf = &local->hw.conf; | |
8318d78a | 1094 | struct ieee80211_supported_band *sband; |
38668c05 TW |
1095 | struct ieee80211_ht_info ht_conf; |
1096 | struct ieee80211_ht_bss_info ht_bss_conf; | |
38668c05 | 1097 | u32 changed = 0; |
edcdf8b2 RR |
1098 | int i; |
1099 | u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS; | |
1100 | u8 tx_mcs_set_cap; | |
d3c990fb | 1101 | |
8318d78a JB |
1102 | sband = local->hw.wiphy->bands[conf->channel->band]; |
1103 | ||
edcdf8b2 RR |
1104 | memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info)); |
1105 | memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info)); | |
1106 | ||
d3c990fb | 1107 | /* HT is not supported */ |
8318d78a | 1108 | if (!sband->ht_info.ht_supported) { |
d3c990fb | 1109 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
edcdf8b2 | 1110 | goto out; |
d3c990fb RR |
1111 | } |
1112 | ||
edcdf8b2 RR |
1113 | /* disable HT */ |
1114 | if (!enable_ht) { | |
1115 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) | |
38668c05 | 1116 | changed |= BSS_CHANGED_HT; |
edcdf8b2 RR |
1117 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
1118 | conf->ht_conf.ht_supported = 0; | |
1119 | goto out; | |
1120 | } | |
38668c05 | 1121 | |
38668c05 | 1122 | |
edcdf8b2 RR |
1123 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) |
1124 | changed |= BSS_CHANGED_HT; | |
38668c05 | 1125 | |
edcdf8b2 RR |
1126 | conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; |
1127 | ht_conf.ht_supported = 1; | |
38668c05 | 1128 | |
edcdf8b2 RR |
1129 | ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap; |
1130 | ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS); | |
1131 | ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS; | |
1132 | ht_bss_conf.primary_channel = req_bss_cap->primary_channel; | |
1133 | ht_bss_conf.bss_cap = req_bss_cap->bss_cap; | |
1134 | ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; | |
38668c05 | 1135 | |
edcdf8b2 RR |
1136 | ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; |
1137 | ht_conf.ampdu_density = req_ht_cap->ampdu_density; | |
38668c05 | 1138 | |
edcdf8b2 RR |
1139 | /* Bits 96-100 */ |
1140 | tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12]; | |
1141 | ||
1142 | /* configure suppoerted Tx MCS according to requested MCS | |
1143 | * (based in most cases on Rx capabilities of peer) and self | |
1144 | * Tx MCS capabilities (as defined by low level driver HW | |
1145 | * Tx capabilities) */ | |
1146 | if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED)) | |
1147 | goto check_changed; | |
d3c990fb | 1148 | |
edcdf8b2 RR |
1149 | /* Counting from 0 therfore + 1 */ |
1150 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF) | |
1151 | max_tx_streams = ((tx_mcs_set_cap & | |
1152 | IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1; | |
1153 | ||
1154 | for (i = 0; i < max_tx_streams; i++) | |
1155 | ht_conf.supp_mcs_set[i] = | |
1156 | sband->ht_info.supp_mcs_set[i] & | |
1157 | req_ht_cap->supp_mcs_set[i]; | |
1158 | ||
1159 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM) | |
1160 | for (i = IEEE80211_SUPP_MCS_SET_UEQM; | |
1161 | i < IEEE80211_SUPP_MCS_SET_LEN; i++) | |
1162 | ht_conf.supp_mcs_set[i] = | |
1163 | sband->ht_info.supp_mcs_set[i] & | |
1164 | req_ht_cap->supp_mcs_set[i]; | |
1165 | ||
1166 | check_changed: | |
1167 | /* if bss configuration changed store the new one */ | |
1168 | if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) || | |
1169 | memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) { | |
1170 | changed |= BSS_CHANGED_HT; | |
1171 | memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf)); | |
1172 | memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf)); | |
1173 | } | |
1174 | out: | |
38668c05 | 1175 | return changed; |
d3c990fb RR |
1176 | } |
1177 | ||
471b3efd JB |
1178 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
1179 | u32 changed) | |
d9430a32 | 1180 | { |
471b3efd JB |
1181 | struct ieee80211_local *local = sdata->local; |
1182 | ||
1183 | if (!changed) | |
1184 | return; | |
1185 | ||
1186 | if (local->ops->bss_info_changed) | |
1187 | local->ops->bss_info_changed(local_to_hw(local), | |
1188 | &sdata->vif, | |
1189 | &sdata->bss_conf, | |
1190 | changed); | |
d9430a32 DD |
1191 | } |
1192 | ||
1193 | void ieee80211_reset_erp_info(struct net_device *dev) | |
1194 | { | |
1195 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1196 | ||
471b3efd JB |
1197 | sdata->bss_conf.use_cts_prot = 0; |
1198 | sdata->bss_conf.use_short_preamble = 0; | |
1199 | ieee80211_bss_info_change_notify(sdata, | |
1200 | BSS_CHANGED_ERP_CTS_PROT | | |
1201 | BSS_CHANGED_ERP_PREAMBLE); | |
d9430a32 DD |
1202 | } |
1203 | ||
f0706e82 | 1204 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 1205 | struct sk_buff *skb) |
f0706e82 JB |
1206 | { |
1207 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 1208 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
1209 | int tmp; |
1210 | ||
1211 | skb->dev = local->mdev; | |
f0706e82 | 1212 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 1213 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
1214 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
1215 | tmp = skb_queue_len(&local->skb_queue) + | |
1216 | skb_queue_len(&local->skb_queue_unreliable); | |
1217 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
1218 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
1219 | dev_kfree_skb_irq(skb); |
1220 | tmp--; | |
1221 | I802_DEBUG_INC(local->tx_status_drop); | |
1222 | } | |
1223 | tasklet_schedule(&local->tasklet); | |
1224 | } | |
1225 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
1226 | ||
1227 | static void ieee80211_tasklet_handler(unsigned long data) | |
1228 | { | |
1229 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
1230 | struct sk_buff *skb; | |
1231 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 1232 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
1233 | |
1234 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
1235 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
1236 | switch (skb->pkt_type) { | |
1237 | case IEEE80211_RX_MSG: | |
1238 | /* status is in skb->cb */ | |
1239 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 1240 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
1241 | * netstack. */ |
1242 | skb->pkt_type = 0; | |
1243 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
1244 | break; | |
1245 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 1246 | skb->pkt_type = 0; |
e039fa4a | 1247 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 1248 | break; |
eadc8d9e RR |
1249 | case IEEE80211_DELBA_MSG: |
1250 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
1251 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
1252 | ra_tid->ra, ra_tid->tid); | |
1253 | dev_kfree_skb(skb); | |
1254 | break; | |
1255 | case IEEE80211_ADDBA_MSG: | |
1256 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
1257 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
1258 | ra_tid->ra, ra_tid->tid); | |
1259 | dev_kfree_skb(skb); | |
1260 | break ; | |
f4ea83dd JB |
1261 | default: |
1262 | WARN_ON(1); | |
f0706e82 JB |
1263 | dev_kfree_skb(skb); |
1264 | break; | |
1265 | } | |
1266 | } | |
1267 | } | |
1268 | ||
f0706e82 JB |
1269 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
1270 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
1271 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
1272 | * Also, tx_packet_data in cb is restored from tx_control. */ | |
1273 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, | |
1274 | struct ieee80211_key *key, | |
e039fa4a | 1275 | struct sk_buff *skb) |
f0706e82 JB |
1276 | { |
1277 | int hdrlen, iv_len, mic_len; | |
e039fa4a JB |
1278 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1279 | ||
1280 | info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
1281 | IEEE80211_TX_CTL_DO_NOT_ENCRYPT | | |
1282 | IEEE80211_TX_CTL_REQUEUE | | |
1283 | IEEE80211_TX_CTL_EAPOL_FRAME; | |
f0706e82 JB |
1284 | |
1285 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
1286 | ||
1287 | if (!key) | |
1288 | goto no_key; | |
1289 | ||
8f20fc24 | 1290 | switch (key->conf.alg) { |
f0706e82 JB |
1291 | case ALG_WEP: |
1292 | iv_len = WEP_IV_LEN; | |
1293 | mic_len = WEP_ICV_LEN; | |
1294 | break; | |
1295 | case ALG_TKIP: | |
1296 | iv_len = TKIP_IV_LEN; | |
1297 | mic_len = TKIP_ICV_LEN; | |
1298 | break; | |
1299 | case ALG_CCMP: | |
1300 | iv_len = CCMP_HDR_LEN; | |
1301 | mic_len = CCMP_MIC_LEN; | |
1302 | break; | |
1303 | default: | |
1304 | goto no_key; | |
1305 | } | |
1306 | ||
8f20fc24 | 1307 | if (skb->len >= mic_len && |
11a843b7 | 1308 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 JB |
1309 | skb_trim(skb, skb->len - mic_len); |
1310 | if (skb->len >= iv_len && skb->len > hdrlen) { | |
1311 | memmove(skb->data + iv_len, skb->data, hdrlen); | |
1312 | skb_pull(skb, iv_len); | |
1313 | } | |
1314 | ||
1315 | no_key: | |
1316 | { | |
1317 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1318 | u16 fc = le16_to_cpu(hdr->frame_control); | |
1319 | if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { | |
1320 | fc &= ~IEEE80211_STYPE_QOS_DATA; | |
1321 | hdr->frame_control = cpu_to_le16(fc); | |
1322 | memmove(skb->data + 2, skb->data, hdrlen - 2); | |
1323 | skb_pull(skb, 2); | |
1324 | } | |
1325 | } | |
1326 | } | |
1327 | ||
d46e144b JB |
1328 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
1329 | struct sta_info *sta, | |
e039fa4a | 1330 | struct sk_buff *skb) |
d46e144b | 1331 | { |
e039fa4a JB |
1332 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1333 | ||
d46e144b JB |
1334 | 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 | |
f6d97104 | 1339 | * when it wakes up for the next time. |
d46e144b | 1340 | */ |
07346f81 | 1341 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
1342 | |
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 | */ | |
07346f81 | 1373 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 1374 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 1375 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
1376 | skb_queue_tail(&sta->tx_filtered, skb); |
1377 | return; | |
1378 | } | |
1379 | ||
07346f81 | 1380 | if (!test_sta_flags(sta, WLAN_STA_PS) && |
e039fa4a | 1381 | !(info->flags & IEEE80211_TX_CTL_REQUEUE)) { |
d46e144b | 1382 | /* Software retry the packet once */ |
e039fa4a JB |
1383 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
1384 | ieee80211_remove_tx_extra(local, sta->key, skb); | |
d46e144b JB |
1385 | dev_queue_xmit(skb); |
1386 | return; | |
1387 | } | |
1388 | ||
f4ea83dd | 1389 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
d46e144b JB |
1390 | 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), | |
07346f81 | 1395 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
f4ea83dd | 1396 | #endif |
d46e144b JB |
1397 | dev_kfree_skb(skb); |
1398 | } | |
1399 | ||
e039fa4a | 1400 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
1401 | { |
1402 | struct sk_buff *skb2; | |
1403 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1404 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 1405 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 1406 | u16 frag, type; |
429a3805 | 1407 | __le16 fc; |
b306f453 JB |
1408 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
1409 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 1410 | struct net_device *prev_dev = NULL; |
429a3805 | 1411 | struct sta_info *sta; |
f0706e82 | 1412 | |
d0709a65 JB |
1413 | rcu_read_lock(); |
1414 | ||
e039fa4a | 1415 | if (info->status.excessive_retries) { |
f0706e82 JB |
1416 | sta = sta_info_get(local, hdr->addr1); |
1417 | if (sta) { | |
07346f81 | 1418 | if (test_sta_flags(sta, WLAN_STA_PS)) { |
d46e144b JB |
1419 | /* |
1420 | * The STA is in power save mode, so assume | |
f0706e82 JB |
1421 | * that this TX packet failed because of that. |
1422 | */ | |
e039fa4a | 1423 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 1424 | rcu_read_unlock(); |
d46e144b | 1425 | return; |
f0706e82 | 1426 | } |
f0706e82 JB |
1427 | } |
1428 | } | |
1429 | ||
429a3805 RR |
1430 | 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); | |
1442 | ieee80211_send_bar(sta->sdata->dev, hdr->addr1, | |
1443 | tid, ssn); | |
1444 | } | |
1445 | } | |
1446 | ||
e039fa4a | 1447 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
f0706e82 JB |
1448 | sta = sta_info_get(local, hdr->addr1); |
1449 | if (sta) { | |
e039fa4a | 1450 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 1451 | rcu_read_unlock(); |
f0706e82 JB |
1452 | return; |
1453 | } | |
1abbe498 | 1454 | } else |
e039fa4a | 1455 | rate_control_tx_status(local->mdev, skb); |
f0706e82 | 1456 | |
d0709a65 JB |
1457 | rcu_read_unlock(); |
1458 | ||
f0706e82 JB |
1459 | 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 | ||
e039fa4a | 1469 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
1470 | if (frag == 0) { |
1471 | local->dot11TransmittedFrameCount++; | |
1472 | if (is_multicast_ether_addr(hdr->addr1)) | |
1473 | local->dot11MulticastTransmittedFrameCount++; | |
e039fa4a | 1474 | if (info->status.retry_count > 0) |
f0706e82 | 1475 | local->dot11RetryCount++; |
e039fa4a | 1476 | if (info->status.retry_count > 1) |
f0706e82 JB |
1477 | 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 | ||
b306f453 JB |
1493 | /* this was a transmitted frame, but now we want to reuse it */ |
1494 | skb_orphan(skb); | |
1495 | ||
3d30d949 MW |
1496 | /* |
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) { | |
f0706e82 JB |
1501 | dev_kfree_skb(skb); |
1502 | return; | |
1503 | } | |
1504 | ||
b306f453 | 1505 | /* send frame to monitor interfaces now */ |
f0706e82 | 1506 | |
b306f453 JB |
1507 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
1508 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
1509 | dev_kfree_skb(skb); |
1510 | return; | |
1511 | } | |
f0706e82 | 1512 | |
988c0f72 | 1513 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
1514 | 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 | ||
e039fa4a | 1522 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
1523 | !is_multicast_ether_addr(hdr->addr1)) |
1524 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
1525 | ||
e039fa4a JB |
1526 | if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) && |
1527 | (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) | |
b306f453 | 1528 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e039fa4a | 1529 | else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) |
b306f453 JB |
1530 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
1531 | ||
e039fa4a | 1532 | rthdr->data_retries = info->status.retry_count; |
b306f453 | 1533 | |
3d30d949 MW |
1534 | /* 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)); | |
1540 | ||
79010420 | 1541 | rcu_read_lock(); |
79010420 | 1542 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
51fb61e7 | 1543 | if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) { |
b306f453 JB |
1544 | if (!netif_running(sdata->dev)) |
1545 | continue; | |
3d30d949 MW |
1546 | |
1547 | if (prev_dev) { | |
79010420 | 1548 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
1549 | if (skb2) { |
1550 | skb2->dev = prev_dev; | |
1551 | netif_rx(skb2); | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | prev_dev = sdata->dev; | |
b306f453 JB |
1556 | } |
1557 | } | |
3d30d949 MW |
1558 | if (prev_dev) { |
1559 | skb->dev = prev_dev; | |
1560 | netif_rx(skb); | |
1561 | skb = NULL; | |
1562 | } | |
79010420 | 1563 | rcu_read_unlock(); |
3d30d949 | 1564 | dev_kfree_skb(skb); |
f0706e82 JB |
1565 | } |
1566 | EXPORT_SYMBOL(ieee80211_tx_status); | |
1567 | ||
f0706e82 JB |
1568 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
1569 | const struct ieee80211_ops *ops) | |
1570 | { | |
f0706e82 | 1571 | struct ieee80211_local *local; |
f0706e82 JB |
1572 | 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 | ||
4480f15c | 1608 | BUG_ON(!ops->tx); |
4150c572 JB |
1609 | BUG_ON(!ops->start); |
1610 | BUG_ON(!ops->stop); | |
4480f15c JB |
1611 | BUG_ON(!ops->config); |
1612 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
1613 | BUG_ON(!ops->remove_interface); |
1614 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
1615 | local->ops = ops; |
1616 | ||
f0706e82 JB |
1617 | local->hw.queues = 1; /* default */ |
1618 | ||
f0706e82 JB |
1619 | 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; | |
f0706e82 | 1626 | |
79010420 | 1627 | INIT_LIST_HEAD(&local->interfaces); |
f0706e82 | 1628 | |
b16bd15c JB |
1629 | spin_lock_init(&local->key_lock); |
1630 | ||
f0706e82 | 1631 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); |
f0706e82 JB |
1632 | |
1633 | sta_info_init(local); | |
1634 | ||
f0706e82 JB |
1635 | 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 | } | |
1649 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
1650 | ||
1651 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
1652 | { | |
1653 | struct ieee80211_local *local = hw_to_local(hw); | |
1654 | const char *name; | |
1655 | int result; | |
8318d78a | 1656 | enum ieee80211_band band; |
96d51056 JB |
1657 | struct net_device *mdev; |
1658 | struct ieee80211_sub_if_data *sdata; | |
8318d78a JB |
1659 | |
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 | } | |
f0706e82 JB |
1677 | |
1678 | result = wiphy_register(local->hw.wiphy); | |
1679 | if (result < 0) | |
1680 | return result; | |
1681 | ||
e2530083 JB |
1682 | /* |
1683 | * We use the number of queues for feature tests (QoS, HT) internally | |
1684 | * so restrict them appropriately. | |
1685 | */ | |
1686 | #ifdef CONFIG_MAC80211_QOS | |
1687 | if (hw->queues > IEEE80211_MAX_QUEUES) | |
1688 | hw->queues = IEEE80211_MAX_QUEUES; | |
1689 | if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) | |
1690 | hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; | |
1691 | if (hw->queues < 4) | |
1692 | hw->ampdu_queues = 0; | |
1693 | #else | |
1694 | hw->queues = 1; | |
1695 | hw->ampdu_queues = 0; | |
1696 | #endif | |
1697 | ||
96d51056 | 1698 | /* for now, mdev needs sub_if_data :/ */ |
e2530083 JB |
1699 | mdev = alloc_netdev_mq(sizeof(struct ieee80211_sub_if_data), |
1700 | "wmaster%d", ether_setup, | |
1701 | ieee80211_num_queues(hw)); | |
96d51056 JB |
1702 | if (!mdev) |
1703 | goto fail_mdev_alloc; | |
1704 | ||
e2530083 JB |
1705 | if (ieee80211_num_queues(hw) > 1) |
1706 | mdev->features |= NETIF_F_MULTI_QUEUE; | |
1707 | ||
96d51056 JB |
1708 | sdata = IEEE80211_DEV_TO_SUB_IF(mdev); |
1709 | mdev->ieee80211_ptr = &sdata->wdev; | |
1710 | sdata->wdev.wiphy = local->hw.wiphy; | |
1711 | ||
1712 | local->mdev = mdev; | |
1713 | ||
1714 | ieee80211_rx_bss_list_init(mdev); | |
1715 | ||
1716 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
1717 | mdev->open = ieee80211_master_open; | |
1718 | mdev->stop = ieee80211_master_stop; | |
1719 | mdev->type = ARPHRD_IEEE80211; | |
1720 | mdev->header_ops = &ieee80211_header_ops; | |
1721 | mdev->set_multicast_list = ieee80211_master_set_multicast_list; | |
1722 | ||
1723 | sdata->vif.type = IEEE80211_IF_TYPE_AP; | |
1724 | sdata->dev = mdev; | |
1725 | sdata->local = local; | |
1726 | sdata->u.ap.force_unicast_rateidx = -1; | |
1727 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
1728 | ieee80211_if_sdata_init(sdata); | |
1729 | ||
1730 | /* no RCU needed since we're still during init phase */ | |
1731 | list_add_tail(&sdata->list, &local->interfaces); | |
1732 | ||
f0706e82 | 1733 | name = wiphy_dev(local->hw.wiphy)->driver->name; |
59959a61 | 1734 | local->hw.workqueue = create_freezeable_workqueue(name); |
f0706e82 JB |
1735 | if (!local->hw.workqueue) { |
1736 | result = -ENOMEM; | |
1737 | goto fail_workqueue; | |
1738 | } | |
1739 | ||
b306f453 JB |
1740 | /* |
1741 | * The hardware needs headroom for sending the frame, | |
1742 | * and we need some headroom for passing the frame to monitor | |
1743 | * interfaces, but never both at the same time. | |
1744 | */ | |
33ccad35 JB |
1745 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
1746 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 1747 | |
e9f207f0 JB |
1748 | debugfs_hw_add(local); |
1749 | ||
dc0ae30c TW |
1750 | if (local->hw.conf.beacon_int < 10) |
1751 | local->hw.conf.beacon_int = 100; | |
f0706e82 | 1752 | |
566bfe5a BR |
1753 | local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | |
1754 | IEEE80211_HW_SIGNAL_DB | | |
1755 | IEEE80211_HW_SIGNAL_DBM) ? | |
f0706e82 | 1756 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; |
566bfe5a | 1757 | local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? |
f0706e82 | 1758 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; |
566bfe5a | 1759 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
f0706e82 JB |
1760 | local->wstats_flags |= IW_QUAL_DBM; |
1761 | ||
1762 | result = sta_info_start(local); | |
1763 | if (result < 0) | |
1764 | goto fail_sta_info; | |
1765 | ||
1766 | rtnl_lock(); | |
1767 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
1768 | if (result < 0) | |
1769 | goto fail_dev; | |
1770 | ||
1771 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
1772 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
1773 | ||
1774 | result = register_netdevice(local->mdev); | |
1775 | if (result < 0) | |
1776 | goto fail_dev; | |
1777 | ||
e9f207f0 | 1778 | ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
5b2812e9 | 1779 | ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP); |
e9f207f0 | 1780 | |
830f9038 JB |
1781 | result = ieee80211_init_rate_ctrl_alg(local, |
1782 | hw->rate_control_algorithm); | |
f0706e82 JB |
1783 | if (result < 0) { |
1784 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 1785 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1786 | goto fail_rate; |
1787 | } | |
1788 | ||
1789 | result = ieee80211_wep_init(local); | |
1790 | ||
1791 | if (result < 0) { | |
1792 | printk(KERN_DEBUG "%s: Failed to initialize wep\n", | |
dd1cd4c6 | 1793 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1794 | goto fail_wep; |
1795 | } | |
1796 | ||
1797 | ieee80211_install_qdisc(local->mdev); | |
1798 | ||
1799 | /* add one default STA interface */ | |
1800 | result = ieee80211_if_add(local->mdev, "wlan%d", NULL, | |
ee385855 | 1801 | IEEE80211_IF_TYPE_STA, NULL); |
f0706e82 JB |
1802 | if (result) |
1803 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
dd1cd4c6 | 1804 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1805 | |
1806 | local->reg_state = IEEE80211_DEV_REGISTERED; | |
1807 | rtnl_unlock(); | |
1808 | ||
1809 | ieee80211_led_init(local); | |
1810 | ||
1811 | return 0; | |
1812 | ||
1813 | fail_wep: | |
1814 | rate_control_deinitialize(local); | |
1815 | fail_rate: | |
e9f207f0 | 1816 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
f0706e82 | 1817 | unregister_netdevice(local->mdev); |
339a7c41 | 1818 | local->mdev = NULL; |
f0706e82 JB |
1819 | fail_dev: |
1820 | rtnl_unlock(); | |
1821 | sta_info_stop(local); | |
1822 | fail_sta_info: | |
e9f207f0 | 1823 | debugfs_hw_del(local); |
f0706e82 JB |
1824 | destroy_workqueue(local->hw.workqueue); |
1825 | fail_workqueue: | |
339a7c41 PE |
1826 | if (local->mdev != NULL) { |
1827 | ieee80211_if_free(local->mdev); | |
1828 | local->mdev = NULL; | |
1829 | } | |
96d51056 | 1830 | fail_mdev_alloc: |
f0706e82 JB |
1831 | wiphy_unregister(local->hw.wiphy); |
1832 | return result; | |
1833 | } | |
1834 | EXPORT_SYMBOL(ieee80211_register_hw); | |
1835 | ||
f0706e82 JB |
1836 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
1837 | { | |
1838 | struct ieee80211_local *local = hw_to_local(hw); | |
1839 | struct ieee80211_sub_if_data *sdata, *tmp; | |
f0706e82 JB |
1840 | |
1841 | tasklet_kill(&local->tx_pending_tasklet); | |
1842 | tasklet_kill(&local->tasklet); | |
1843 | ||
1844 | rtnl_lock(); | |
1845 | ||
1846 | BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); | |
1847 | ||
1848 | local->reg_state = IEEE80211_DEV_UNREGISTERED; | |
f0706e82 | 1849 | |
79010420 JB |
1850 | /* |
1851 | * At this point, interface list manipulations are fine | |
1852 | * because the driver cannot be handing us frames any | |
1853 | * more and the tasklet is killed. | |
1854 | */ | |
5b2812e9 JB |
1855 | |
1856 | /* | |
1857 | * First, we remove all non-master interfaces. Do this because they | |
1858 | * may have bss pointer dependency on the master, and when we free | |
1859 | * the master these would be freed as well, breaking our list | |
1860 | * iteration completely. | |
1861 | */ | |
1862 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { | |
1863 | if (sdata->dev == local->mdev) | |
1864 | continue; | |
1865 | list_del(&sdata->list); | |
f0706e82 | 1866 | __ieee80211_if_del(local, sdata); |
5b2812e9 JB |
1867 | } |
1868 | ||
1869 | /* then, finally, remove the master interface */ | |
1870 | __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev)); | |
f0706e82 JB |
1871 | |
1872 | rtnl_unlock(); | |
1873 | ||
f0706e82 JB |
1874 | ieee80211_rx_bss_list_deinit(local->mdev); |
1875 | ieee80211_clear_tx_pending(local); | |
1876 | sta_info_stop(local); | |
1877 | rate_control_deinitialize(local); | |
e9f207f0 | 1878 | debugfs_hw_del(local); |
f0706e82 | 1879 | |
f0706e82 JB |
1880 | if (skb_queue_len(&local->skb_queue) |
1881 | || skb_queue_len(&local->skb_queue_unreliable)) | |
1882 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 1883 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1884 | skb_queue_purge(&local->skb_queue); |
1885 | skb_queue_purge(&local->skb_queue_unreliable); | |
1886 | ||
1887 | destroy_workqueue(local->hw.workqueue); | |
1888 | wiphy_unregister(local->hw.wiphy); | |
1889 | ieee80211_wep_free(local); | |
1890 | ieee80211_led_exit(local); | |
96d51056 JB |
1891 | ieee80211_if_free(local->mdev); |
1892 | local->mdev = NULL; | |
f0706e82 JB |
1893 | } |
1894 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1895 | ||
1896 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1897 | { | |
1898 | struct ieee80211_local *local = hw_to_local(hw); | |
1899 | ||
f0706e82 JB |
1900 | wiphy_free(local->hw.wiphy); |
1901 | } | |
1902 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1903 | ||
f0706e82 JB |
1904 | static int __init ieee80211_init(void) |
1905 | { | |
1906 | struct sk_buff *skb; | |
1907 | int ret; | |
1908 | ||
e039fa4a JB |
1909 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1910 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
1911 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); | |
f0706e82 | 1912 | |
4b475898 | 1913 | ret = rc80211_pid_init(); |
ad018375 | 1914 | if (ret) |
d9357136 | 1915 | goto out; |
ac71c691 | 1916 | |
f0706e82 JB |
1917 | ret = ieee80211_wme_register(); |
1918 | if (ret) { | |
1919 | printk(KERN_DEBUG "ieee80211_init: failed to " | |
1920 | "initialize WME (err=%d)\n", ret); | |
3eadf5f4 | 1921 | goto out_cleanup_pid; |
f0706e82 JB |
1922 | } |
1923 | ||
e9f207f0 JB |
1924 | ieee80211_debugfs_netdev_init(); |
1925 | ||
f0706e82 | 1926 | return 0; |
ad018375 | 1927 | |
3eadf5f4 | 1928 | out_cleanup_pid: |
4b475898 | 1929 | rc80211_pid_exit(); |
3eadf5f4 | 1930 | out: |
ad018375 | 1931 | return ret; |
f0706e82 JB |
1932 | } |
1933 | ||
f0706e82 JB |
1934 | static void __exit ieee80211_exit(void) |
1935 | { | |
4b475898 | 1936 | rc80211_pid_exit(); |
ac71c691 | 1937 | |
3b96766f JB |
1938 | /* |
1939 | * For key todo, it'll be empty by now but the work | |
1940 | * might still be scheduled. | |
1941 | */ | |
1942 | flush_scheduled_work(); | |
1943 | ||
f7a92144 LCC |
1944 | if (mesh_allocated) |
1945 | ieee80211s_stop(); | |
902acc78 | 1946 | |
f0706e82 | 1947 | ieee80211_wme_unregister(); |
e9f207f0 | 1948 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1949 | } |
1950 | ||
1951 | ||
ca9938fe | 1952 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1953 | module_exit(ieee80211_exit); |
1954 | ||
1955 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1956 | MODULE_LICENSE("GPL"); |