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Commit | Line | Data |
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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> | |
f0706e82 JB |
12 | #include <linux/module.h> |
13 | #include <linux/init.h> | |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/etherdevice.h> | |
19 | #include <linux/if_arp.h> | |
f0706e82 | 20 | #include <linux/rtnetlink.h> |
f0706e82 | 21 | #include <linux/bitmap.h> |
10f644a4 | 22 | #include <linux/pm_qos_params.h> |
68542962 | 23 | #include <linux/inetdevice.h> |
881d966b | 24 | #include <net/net_namespace.h> |
f0706e82 JB |
25 | #include <net/cfg80211.h> |
26 | ||
f0706e82 | 27 | #include "ieee80211_i.h" |
24487981 | 28 | #include "driver-ops.h" |
2c8dccc7 | 29 | #include "rate.h" |
f7a92144 | 30 | #include "mesh.h" |
f0706e82 | 31 | #include "wep.h" |
2c8dccc7 | 32 | #include "led.h" |
e0eb6859 | 33 | #include "cfg.h" |
e9f207f0 | 34 | #include "debugfs.h" |
f0706e82 | 35 | |
f38fd12f JB |
36 | |
37 | bool ieee80211_disable_40mhz_24ghz; | |
38 | module_param(ieee80211_disable_40mhz_24ghz, bool, 0644); | |
39 | MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz, | |
40 | "Disable 40MHz support in the 2.4GHz band"); | |
41 | ||
0d143fe1 | 42 | void ieee80211_configure_filter(struct ieee80211_local *local) |
4150c572 | 43 | { |
3ac64bee | 44 | u64 mc; |
4150c572 JB |
45 | unsigned int changed_flags; |
46 | unsigned int new_flags = 0; | |
47 | ||
53918994 | 48 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
49 | new_flags |= FIF_PROMISC_IN_BSS; |
50 | ||
53918994 | 51 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
52 | new_flags |= FIF_ALLMULTI; |
53 | ||
3ac64bee | 54 | if (local->monitors || local->scanning) |
8cc9a739 MW |
55 | new_flags |= FIF_BCN_PRBRESP_PROMISC; |
56 | ||
57 | if (local->fif_fcsfail) | |
58 | new_flags |= FIF_FCSFAIL; | |
59 | ||
60 | if (local->fif_plcpfail) | |
61 | new_flags |= FIF_PLCPFAIL; | |
62 | ||
63 | if (local->fif_control) | |
64 | new_flags |= FIF_CONTROL; | |
65 | ||
66 | if (local->fif_other_bss) | |
67 | new_flags |= FIF_OTHER_BSS; | |
4150c572 | 68 | |
e3b90ca2 IP |
69 | if (local->fif_pspoll) |
70 | new_flags |= FIF_PSPOLL; | |
71 | ||
3ac64bee | 72 | spin_lock_bh(&local->filter_lock); |
4150c572 JB |
73 | changed_flags = local->filter_flags ^ new_flags; |
74 | ||
22bedad3 | 75 | mc = drv_prepare_multicast(local, &local->mc_list); |
3ac64bee JB |
76 | spin_unlock_bh(&local->filter_lock); |
77 | ||
4150c572 JB |
78 | /* be a bit nasty */ |
79 | new_flags |= (1<<31); | |
80 | ||
3ac64bee | 81 | drv_configure_filter(local, changed_flags, &new_flags, mc); |
4150c572 JB |
82 | |
83 | WARN_ON(new_flags & (1<<31)); | |
84 | ||
85 | local->filter_flags = new_flags & ~(1<<31); | |
86 | } | |
87 | ||
3ac64bee JB |
88 | static void ieee80211_reconfig_filter(struct work_struct *work) |
89 | { | |
90 | struct ieee80211_local *local = | |
91 | container_of(work, struct ieee80211_local, reconfig_filter); | |
92 | ||
93 | ieee80211_configure_filter(local); | |
94 | } | |
95 | ||
e8975581 | 96 | int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) |
b2c258fb | 97 | { |
58905ca5 | 98 | struct ieee80211_channel *chan, *scan_chan; |
b2c258fb | 99 | int ret = 0; |
e8975581 | 100 | int power; |
094d05dc | 101 | enum nl80211_channel_type channel_type; |
ffd2778b | 102 | u32 offchannel_flag; |
f0706e82 | 103 | |
cb121bad JB |
104 | might_sleep(); |
105 | ||
58905ca5 JB |
106 | scan_chan = local->scan_channel; |
107 | ||
ffd2778b | 108 | offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; |
58905ca5 JB |
109 | if (scan_chan) { |
110 | chan = scan_chan; | |
094d05dc | 111 | channel_type = NL80211_CHAN_NO_HT; |
45521245 | 112 | local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; |
b8bc4b0a JB |
113 | } else if (local->tmp_channel) { |
114 | chan = scan_chan = local->tmp_channel; | |
115 | channel_type = local->tmp_channel_type; | |
45521245 | 116 | local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; |
72bdcf34 | 117 | } else { |
b2c258fb | 118 | chan = local->oper_channel; |
0aaffa9b | 119 | channel_type = local->_oper_channel_type; |
45521245 | 120 | local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; |
72bdcf34 | 121 | } |
ffd2778b | 122 | offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; |
f0706e82 | 123 | |
ffd2778b | 124 | if (offchannel_flag || chan != local->hw.conf.channel || |
4797938c | 125 | channel_type != local->hw.conf.channel_type) { |
e8975581 | 126 | local->hw.conf.channel = chan; |
4797938c | 127 | local->hw.conf.channel_type = channel_type; |
e8975581 JB |
128 | changed |= IEEE80211_CONF_CHANGE_CHANNEL; |
129 | } | |
8318d78a | 130 | |
0f78231b JB |
131 | if (!conf_is_ht(&local->hw.conf)) { |
132 | /* | |
133 | * mac80211.h documents that this is only valid | |
134 | * when the channel is set to an HT type, and | |
135 | * that otherwise STATIC is used. | |
136 | */ | |
137 | local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; | |
138 | } else if (local->hw.conf.smps_mode != local->smps_mode) { | |
139 | local->hw.conf.smps_mode = local->smps_mode; | |
140 | changed |= IEEE80211_CONF_CHANGE_SMPS; | |
141 | } | |
142 | ||
58905ca5 | 143 | if (scan_chan) |
e8975581 | 144 | power = chan->max_power; |
8318d78a | 145 | else |
a8302de9 VT |
146 | power = local->power_constr_level ? |
147 | (chan->max_power - local->power_constr_level) : | |
148 | chan->max_power; | |
149 | ||
47afbaf5 | 150 | if (local->user_power_level >= 0) |
a8302de9 VT |
151 | power = min(power, local->user_power_level); |
152 | ||
e8975581 JB |
153 | if (local->hw.conf.power_level != power) { |
154 | changed |= IEEE80211_CONF_CHANGE_POWER; | |
155 | local->hw.conf.power_level = power; | |
156 | } | |
b2c258fb | 157 | |
e8975581 | 158 | if (changed && local->open_count) { |
24487981 | 159 | ret = drv_config(local, changed); |
d73782fd | 160 | /* |
447107fb | 161 | * Goal: |
d73782fd JB |
162 | * HW reconfiguration should never fail, the driver has told |
163 | * us what it can support so it should live up to that promise. | |
447107fb RC |
164 | * |
165 | * Current status: | |
166 | * rfkill is not integrated with mac80211 and a | |
167 | * configuration command can thus fail if hardware rfkill | |
168 | * is enabled | |
169 | * | |
170 | * FIXME: integrate rfkill with mac80211 and then add this | |
171 | * WARN_ON() back | |
172 | * | |
d73782fd | 173 | */ |
447107fb | 174 | /* WARN_ON(ret); */ |
d73782fd | 175 | } |
f0706e82 | 176 | |
b2c258fb JB |
177 | return ret; |
178 | } | |
f0706e82 | 179 | |
471b3efd JB |
180 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
181 | u32 changed) | |
d9430a32 | 182 | { |
471b3efd | 183 | struct ieee80211_local *local = sdata->local; |
9cef8737 | 184 | static const u8 zero[ETH_ALEN] = { 0 }; |
471b3efd JB |
185 | |
186 | if (!changed) | |
187 | return; | |
188 | ||
9cef8737 JB |
189 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
190 | /* | |
191 | * While not associated, claim a BSSID of all-zeroes | |
192 | * so that drivers don't do any weird things with the | |
193 | * BSSID at that time. | |
194 | */ | |
195 | if (sdata->vif.bss_conf.assoc) | |
196 | sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; | |
197 | else | |
198 | sdata->vif.bss_conf.bssid = zero; | |
199 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2d0ddec5 JB |
200 | sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; |
201 | else if (sdata->vif.type == NL80211_IFTYPE_AP) | |
47846c9b | 202 | sdata->vif.bss_conf.bssid = sdata->vif.addr; |
2d0ddec5 | 203 | else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2d0ddec5 JB |
204 | sdata->vif.bss_conf.bssid = zero; |
205 | } else { | |
206 | WARN_ON(1); | |
207 | return; | |
208 | } | |
209 | ||
210 | switch (sdata->vif.type) { | |
211 | case NL80211_IFTYPE_AP: | |
212 | case NL80211_IFTYPE_ADHOC: | |
213 | case NL80211_IFTYPE_MESH_POINT: | |
214 | break; | |
215 | default: | |
216 | /* do not warn to simplify caller in scan.c */ | |
217 | changed &= ~BSS_CHANGED_BEACON_ENABLED; | |
218 | if (WARN_ON(changed & BSS_CHANGED_BEACON)) | |
219 | return; | |
220 | break; | |
221 | } | |
222 | ||
223 | if (changed & BSS_CHANGED_BEACON_ENABLED) { | |
9607e6b6 | 224 | if (local->quiescing || !ieee80211_sdata_running(sdata) || |
97af7432 | 225 | test_bit(SCAN_SW_SCANNING, &local->scanning)) { |
2d0ddec5 JB |
226 | sdata->vif.bss_conf.enable_beacon = false; |
227 | } else { | |
228 | /* | |
229 | * Beacon should be enabled, but AP mode must | |
230 | * check whether there is a beacon configured. | |
231 | */ | |
232 | switch (sdata->vif.type) { | |
233 | case NL80211_IFTYPE_AP: | |
234 | sdata->vif.bss_conf.enable_beacon = | |
0379185b | 235 | !!sdata->u.ap.beacon; |
2d0ddec5 JB |
236 | break; |
237 | case NL80211_IFTYPE_ADHOC: | |
238 | sdata->vif.bss_conf.enable_beacon = | |
0379185b | 239 | !!sdata->u.ibss.presp; |
2d0ddec5 JB |
240 | break; |
241 | case NL80211_IFTYPE_MESH_POINT: | |
242 | sdata->vif.bss_conf.enable_beacon = true; | |
243 | break; | |
244 | default: | |
245 | /* not reached */ | |
246 | WARN_ON(1); | |
247 | break; | |
248 | } | |
249 | } | |
250 | } | |
251 | ||
12375ef9 | 252 | drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); |
d9430a32 DD |
253 | } |
254 | ||
f698d856 | 255 | u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
d9430a32 | 256 | { |
bda3933a JB |
257 | sdata->vif.bss_conf.use_cts_prot = false; |
258 | sdata->vif.bss_conf.use_short_preamble = false; | |
259 | sdata->vif.bss_conf.use_short_slot = false; | |
7a5158ef JB |
260 | return BSS_CHANGED_ERP_CTS_PROT | |
261 | BSS_CHANGED_ERP_PREAMBLE | | |
262 | BSS_CHANGED_ERP_SLOT; | |
d9430a32 DD |
263 | } |
264 | ||
f0706e82 JB |
265 | static void ieee80211_tasklet_handler(unsigned long data) |
266 | { | |
267 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
268 | struct sk_buff *skb; | |
f0706e82 JB |
269 | |
270 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
271 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
272 | switch (skb->pkt_type) { | |
273 | case IEEE80211_RX_MSG: | |
51fb61e7 | 274 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
275 | * netstack. */ |
276 | skb->pkt_type = 0; | |
f1d58c25 | 277 | ieee80211_rx(local_to_hw(local), skb); |
f0706e82 JB |
278 | break; |
279 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 280 | skb->pkt_type = 0; |
e039fa4a | 281 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 282 | break; |
f4ea83dd | 283 | default: |
5e3f3089 LF |
284 | WARN(1, "mac80211: Packet is of unknown type %d\n", |
285 | skb->pkt_type); | |
f0706e82 JB |
286 | dev_kfree_skb(skb); |
287 | break; | |
288 | } | |
289 | } | |
290 | } | |
291 | ||
f2753ddb JB |
292 | static void ieee80211_restart_work(struct work_struct *work) |
293 | { | |
294 | struct ieee80211_local *local = | |
295 | container_of(work, struct ieee80211_local, restart_work); | |
296 | ||
297 | rtnl_lock(); | |
298 | ieee80211_reconfig(local); | |
299 | rtnl_unlock(); | |
300 | } | |
301 | ||
302 | void ieee80211_restart_hw(struct ieee80211_hw *hw) | |
303 | { | |
304 | struct ieee80211_local *local = hw_to_local(hw); | |
305 | ||
b5878a2d JB |
306 | trace_api_restart_hw(local); |
307 | ||
f2753ddb JB |
308 | /* use this reason, __ieee80211_resume will unblock it */ |
309 | ieee80211_stop_queues_by_reason(hw, | |
310 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
311 | ||
312 | schedule_work(&local->restart_work); | |
313 | } | |
314 | EXPORT_SYMBOL(ieee80211_restart_hw); | |
315 | ||
0f78231b JB |
316 | static void ieee80211_recalc_smps_work(struct work_struct *work) |
317 | { | |
318 | struct ieee80211_local *local = | |
319 | container_of(work, struct ieee80211_local, recalc_smps); | |
320 | ||
321 | mutex_lock(&local->iflist_mtx); | |
322 | ieee80211_recalc_smps(local, NULL); | |
323 | mutex_unlock(&local->iflist_mtx); | |
324 | } | |
325 | ||
26b36cfe | 326 | #ifdef CONFIG_INET |
2b2c009e JO |
327 | static int ieee80211_ifa_changed(struct notifier_block *nb, |
328 | unsigned long data, void *arg) | |
329 | { | |
330 | struct in_ifaddr *ifa = arg; | |
331 | struct ieee80211_local *local = | |
332 | container_of(nb, struct ieee80211_local, | |
333 | ifa_notifier); | |
334 | struct net_device *ndev = ifa->ifa_dev->dev; | |
335 | struct wireless_dev *wdev = ndev->ieee80211_ptr; | |
68542962 | 336 | struct in_device *idev; |
2b2c009e | 337 | struct ieee80211_sub_if_data *sdata; |
68542962 | 338 | struct ieee80211_bss_conf *bss_conf; |
2b2c009e | 339 | struct ieee80211_if_managed *ifmgd; |
68542962 | 340 | int c = 0; |
2b2c009e | 341 | |
90b72609 JO |
342 | if (!netif_running(ndev)) |
343 | return NOTIFY_DONE; | |
344 | ||
2b2c009e JO |
345 | /* Make sure it's our interface that got changed */ |
346 | if (!wdev) | |
347 | return NOTIFY_DONE; | |
348 | ||
349 | if (wdev->wiphy != local->hw.wiphy) | |
350 | return NOTIFY_DONE; | |
351 | ||
2b2c009e | 352 | sdata = IEEE80211_DEV_TO_SUB_IF(ndev); |
68542962 | 353 | bss_conf = &sdata->vif.bss_conf; |
2b2c009e JO |
354 | |
355 | /* ARP filtering is only supported in managed mode */ | |
356 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
357 | return NOTIFY_DONE; | |
358 | ||
68542962 JO |
359 | idev = sdata->dev->ip_ptr; |
360 | if (!idev) | |
361 | return NOTIFY_DONE; | |
362 | ||
2b2c009e JO |
363 | ifmgd = &sdata->u.mgd; |
364 | mutex_lock(&ifmgd->mtx); | |
68542962 JO |
365 | |
366 | /* Copy the addresses to the bss_conf list */ | |
367 | ifa = idev->ifa_list; | |
368 | while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { | |
369 | bss_conf->arp_addr_list[c] = ifa->ifa_address; | |
370 | ifa = ifa->ifa_next; | |
371 | c++; | |
372 | } | |
373 | ||
374 | /* If not all addresses fit the list, disable filtering */ | |
375 | if (ifa) { | |
376 | sdata->arp_filter_state = false; | |
377 | c = 0; | |
378 | } else { | |
379 | sdata->arp_filter_state = true; | |
380 | } | |
381 | bss_conf->arp_addr_cnt = c; | |
382 | ||
383 | /* Configure driver only if associated */ | |
384 | if (ifmgd->associated) { | |
385 | bss_conf->arp_filter_enabled = sdata->arp_filter_state; | |
386 | ieee80211_bss_info_change_notify(sdata, | |
387 | BSS_CHANGED_ARP_FILTER); | |
388 | } | |
389 | ||
2b2c009e JO |
390 | mutex_unlock(&ifmgd->mtx); |
391 | ||
392 | return NOTIFY_DONE; | |
393 | } | |
26b36cfe | 394 | #endif |
2b2c009e | 395 | |
4e6cbfd0 JL |
396 | static int ieee80211_napi_poll(struct napi_struct *napi, int budget) |
397 | { | |
398 | struct ieee80211_local *local = | |
399 | container_of(napi, struct ieee80211_local, napi); | |
400 | ||
401 | return local->ops->napi_poll(&local->hw, budget); | |
402 | } | |
403 | ||
404 | void ieee80211_napi_schedule(struct ieee80211_hw *hw) | |
405 | { | |
406 | struct ieee80211_local *local = hw_to_local(hw); | |
407 | ||
408 | napi_schedule(&local->napi); | |
409 | } | |
410 | EXPORT_SYMBOL(ieee80211_napi_schedule); | |
411 | ||
412 | void ieee80211_napi_complete(struct ieee80211_hw *hw) | |
413 | { | |
414 | struct ieee80211_local *local = hw_to_local(hw); | |
415 | ||
416 | napi_complete(&local->napi); | |
417 | } | |
418 | EXPORT_SYMBOL(ieee80211_napi_complete); | |
419 | ||
f0706e82 JB |
420 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
421 | const struct ieee80211_ops *ops) | |
422 | { | |
f0706e82 | 423 | struct ieee80211_local *local; |
96f5e66e | 424 | int priv_size, i; |
f0706e82 JB |
425 | struct wiphy *wiphy; |
426 | ||
427 | /* Ensure 32-byte alignment of our private data and hw private data. | |
428 | * We use the wiphy priv data for both our ieee80211_local and for | |
429 | * the driver's private data | |
430 | * | |
431 | * In memory it'll be like this: | |
432 | * | |
433 | * +-------------------------+ | |
434 | * | struct wiphy | | |
435 | * +-------------------------+ | |
436 | * | struct ieee80211_local | | |
437 | * +-------------------------+ | |
438 | * | driver's private data | | |
439 | * +-------------------------+ | |
440 | * | |
441 | */ | |
1ce8e7b5 | 442 | priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; |
f0706e82 JB |
443 | |
444 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
445 | ||
446 | if (!wiphy) | |
447 | return NULL; | |
448 | ||
9bc383de JB |
449 | wiphy->flags |= WIPHY_FLAG_NETNS_OK | |
450 | WIPHY_FLAG_4ADDR_AP | | |
451 | WIPHY_FLAG_4ADDR_STATION; | |
f0706e82 | 452 | wiphy->privid = mac80211_wiphy_privid; |
18a83659 | 453 | |
0c1ad2ca | 454 | wiphy->bss_priv_size = sizeof(struct ieee80211_bss); |
f0706e82 JB |
455 | |
456 | local = wiphy_priv(wiphy); | |
de95a54b | 457 | |
f0706e82 JB |
458 | local->hw.wiphy = wiphy; |
459 | ||
1ce8e7b5 | 460 | local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); |
f0706e82 | 461 | |
4480f15c | 462 | BUG_ON(!ops->tx); |
4150c572 JB |
463 | BUG_ON(!ops->start); |
464 | BUG_ON(!ops->stop); | |
4480f15c JB |
465 | BUG_ON(!ops->config); |
466 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
467 | BUG_ON(!ops->remove_interface); |
468 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
469 | local->ops = ops; |
470 | ||
e6a9854b JB |
471 | /* set up some defaults */ |
472 | local->hw.queues = 1; | |
473 | local->hw.max_rates = 1; | |
b9a5f8ca JM |
474 | local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; |
475 | local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; | |
c428c892 | 476 | local->user_power_level = -1; |
50ae0cf1 KV |
477 | local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; |
478 | local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; | |
f0706e82 | 479 | |
79010420 | 480 | INIT_LIST_HEAD(&local->interfaces); |
2f787b0b YH |
481 | |
482 | __hw_addr_init(&local->mc_list); | |
483 | ||
c771c9d8 | 484 | mutex_init(&local->iflist_mtx); |
f3b85252 | 485 | mutex_init(&local->scan_mtx); |
f0706e82 | 486 | |
ad0e2b5a | 487 | mutex_init(&local->key_mtx); |
3b8d81e0 | 488 | spin_lock_init(&local->filter_lock); |
ce7c9111 KV |
489 | spin_lock_init(&local->queue_stop_reason_lock); |
490 | ||
c2b13452 | 491 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
f0706e82 | 492 | |
af6b6374 JB |
493 | ieee80211_work_init(local); |
494 | ||
f2753ddb JB |
495 | INIT_WORK(&local->restart_work, ieee80211_restart_work); |
496 | ||
3ac64bee | 497 | INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); |
0f78231b JB |
498 | INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); |
499 | local->smps_mode = IEEE80211_SMPS_OFF; | |
3ac64bee | 500 | |
520eb820 KV |
501 | INIT_WORK(&local->dynamic_ps_enable_work, |
502 | ieee80211_dynamic_ps_enable_work); | |
503 | INIT_WORK(&local->dynamic_ps_disable_work, | |
504 | ieee80211_dynamic_ps_disable_work); | |
505 | setup_timer(&local->dynamic_ps_timer, | |
506 | ieee80211_dynamic_ps_timer, (unsigned long) local); | |
507 | ||
f0706e82 JB |
508 | sta_info_init(local); |
509 | ||
a6a67db2 | 510 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { |
2a577d98 | 511 | skb_queue_head_init(&local->pending[i]); |
a6a67db2 JB |
512 | atomic_set(&local->agg_queue_stop[i], 0); |
513 | } | |
f0706e82 JB |
514 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
515 | (unsigned long)local); | |
f0706e82 JB |
516 | |
517 | tasklet_init(&local->tasklet, | |
518 | ieee80211_tasklet_handler, | |
519 | (unsigned long) local); | |
f0706e82 JB |
520 | |
521 | skb_queue_head_init(&local->skb_queue); | |
522 | skb_queue_head_init(&local->skb_queue_unreliable); | |
523 | ||
4e6cbfd0 JL |
524 | /* init dummy netdev for use w/ NAPI */ |
525 | init_dummy_netdev(&local->napi_dev); | |
526 | ||
f0706e82 JB |
527 | return local_to_hw(local); |
528 | } | |
529 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
530 | ||
531 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
532 | { | |
533 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 | 534 | int result; |
8318d78a | 535 | enum ieee80211_band band; |
be4a4b6a | 536 | int channels, max_bitrates; |
5ef2d41a | 537 | bool supp_ht; |
25e47c18 JB |
538 | static const u32 cipher_suites[] = { |
539 | WLAN_CIPHER_SUITE_WEP40, | |
540 | WLAN_CIPHER_SUITE_WEP104, | |
541 | WLAN_CIPHER_SUITE_TKIP, | |
542 | WLAN_CIPHER_SUITE_CCMP, | |
543 | ||
544 | /* keep last -- depends on hw flags! */ | |
545 | WLAN_CIPHER_SUITE_AES_CMAC | |
546 | }; | |
8318d78a JB |
547 | |
548 | /* | |
549 | * generic code guarantees at least one band, | |
550 | * set this very early because much code assumes | |
551 | * that hw.conf.channel is assigned | |
552 | */ | |
2a519311 | 553 | channels = 0; |
de95a54b | 554 | max_bitrates = 0; |
5ef2d41a | 555 | supp_ht = false; |
8318d78a JB |
556 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
557 | struct ieee80211_supported_band *sband; | |
558 | ||
559 | sband = local->hw.wiphy->bands[band]; | |
de95a54b JB |
560 | if (!sband) |
561 | continue; | |
562 | if (!local->oper_channel) { | |
8318d78a JB |
563 | /* init channel we're on */ |
564 | local->hw.conf.channel = | |
58905ca5 JB |
565 | local->oper_channel = &sband->channels[0]; |
566 | local->hw.conf.channel_type = NL80211_CHAN_NO_HT; | |
8318d78a | 567 | } |
de95a54b JB |
568 | channels += sband->n_channels; |
569 | ||
570 | if (max_bitrates < sband->n_bitrates) | |
571 | max_bitrates = sband->n_bitrates; | |
5ef2d41a | 572 | supp_ht = supp_ht || sband->ht_cap.ht_supported; |
8318d78a | 573 | } |
f0706e82 | 574 | |
5ba63533 JB |
575 | local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + |
576 | sizeof(void *) * channels, GFP_KERNEL); | |
577 | if (!local->int_scan_req) | |
2a519311 JB |
578 | return -ENOMEM; |
579 | ||
f59ac048 LR |
580 | /* if low-level driver supports AP, we also support VLAN */ |
581 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) | |
582 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
583 | ||
584 | /* mac80211 always supports monitor */ | |
585 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); | |
586 | ||
77965c97 JB |
587 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
588 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; | |
589 | else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) | |
590 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; | |
591 | ||
ab13315a KV |
592 | WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) |
593 | && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), | |
594 | "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); | |
595 | ||
de95a54b JB |
596 | /* |
597 | * Calculate scan IE length -- we need this to alloc | |
598 | * memory and to subtract from the driver limit. It | |
599 | * includes the (extended) supported rates and HT | |
600 | * information -- SSID is the driver's responsibility. | |
601 | */ | |
602 | local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ | |
5ef2d41a JB |
603 | if (supp_ht) |
604 | local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); | |
de95a54b JB |
605 | |
606 | if (!local->ops->hw_scan) { | |
607 | /* For hw_scan, driver needs to set these up. */ | |
608 | local->hw.wiphy->max_scan_ssids = 4; | |
609 | local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; | |
610 | } | |
611 | ||
612 | /* | |
613 | * If the driver supports any scan IEs, then assume the | |
614 | * limit includes the IEs mac80211 will add, otherwise | |
615 | * leave it at zero and let the driver sort it out; we | |
616 | * still pass our IEs to the driver but userspace will | |
617 | * not be allowed to in that case. | |
618 | */ | |
619 | if (local->hw.wiphy->max_scan_ie_len) | |
620 | local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; | |
621 | ||
25e47c18 JB |
622 | local->hw.wiphy->cipher_suites = cipher_suites; |
623 | local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); | |
624 | if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) | |
625 | local->hw.wiphy->n_cipher_suites--; | |
626 | ||
f0706e82 JB |
627 | result = wiphy_register(local->hw.wiphy); |
628 | if (result < 0) | |
2a519311 | 629 | goto fail_wiphy_register; |
f0706e82 | 630 | |
e2530083 JB |
631 | /* |
632 | * We use the number of queues for feature tests (QoS, HT) internally | |
633 | * so restrict them appropriately. | |
634 | */ | |
e2530083 JB |
635 | if (hw->queues > IEEE80211_MAX_QUEUES) |
636 | hw->queues = IEEE80211_MAX_QUEUES; | |
e2530083 | 637 | |
42935eca | 638 | local->workqueue = |
30d3ef41 | 639 | create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); |
42935eca | 640 | if (!local->workqueue) { |
f0706e82 JB |
641 | result = -ENOMEM; |
642 | goto fail_workqueue; | |
643 | } | |
644 | ||
b306f453 JB |
645 | /* |
646 | * The hardware needs headroom for sending the frame, | |
647 | * and we need some headroom for passing the frame to monitor | |
648 | * interfaces, but never both at the same time. | |
649 | */ | |
d24deb25 GW |
650 | BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != |
651 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
33ccad35 JB |
652 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
653 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 654 | |
e9f207f0 JB |
655 | debugfs_hw_add(local); |
656 | ||
b446918b HS |
657 | /* |
658 | * if the driver doesn't specify a max listen interval we | |
659 | * use 5 which should be a safe default | |
660 | */ | |
ea95bba4 | 661 | if (local->hw.max_listen_interval == 0) |
b446918b | 662 | local->hw.max_listen_interval = 5; |
ea95bba4 TW |
663 | |
664 | local->hw.conf.listen_interval = local->hw.max_listen_interval; | |
665 | ||
ff616381 | 666 | local->dynamic_ps_forced_timeout = -1; |
195e294d | 667 | |
f0706e82 JB |
668 | result = sta_info_start(local); |
669 | if (result < 0) | |
670 | goto fail_sta_info; | |
671 | ||
d4c4a9a1 | 672 | result = ieee80211_wep_init(local); |
3473187d | 673 | if (result < 0) |
d4c4a9a1 AJ |
674 | printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", |
675 | wiphy_name(local->hw.wiphy), result); | |
d4c4a9a1 | 676 | |
f0706e82 | 677 | rtnl_lock(); |
f0706e82 | 678 | |
830f9038 JB |
679 | result = ieee80211_init_rate_ctrl_alg(local, |
680 | hw->rate_control_algorithm); | |
f0706e82 JB |
681 | if (result < 0) { |
682 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 683 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
684 | goto fail_rate; |
685 | } | |
686 | ||
8dffff21 JB |
687 | /* add one default STA interface if supported */ |
688 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { | |
689 | result = ieee80211_if_add(local, "wlan%d", NULL, | |
690 | NL80211_IFTYPE_STATION, NULL); | |
691 | if (result) | |
692 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
693 | wiphy_name(local->hw.wiphy)); | |
694 | } | |
f0706e82 | 695 | |
f0706e82 JB |
696 | rtnl_unlock(); |
697 | ||
698 | ieee80211_led_init(local); | |
699 | ||
10f644a4 JB |
700 | local->network_latency_notifier.notifier_call = |
701 | ieee80211_max_network_latency; | |
702 | result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, | |
703 | &local->network_latency_notifier); | |
10f644a4 JB |
704 | if (result) { |
705 | rtnl_lock(); | |
706 | goto fail_pm_qos; | |
707 | } | |
708 | ||
26b36cfe | 709 | #ifdef CONFIG_INET |
2b2c009e JO |
710 | local->ifa_notifier.notifier_call = ieee80211_ifa_changed; |
711 | result = register_inetaddr_notifier(&local->ifa_notifier); | |
712 | if (result) | |
713 | goto fail_ifa; | |
26b36cfe | 714 | #endif |
2b2c009e | 715 | |
4e6cbfd0 JL |
716 | netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, |
717 | local->hw.napi_weight); | |
718 | ||
f0706e82 JB |
719 | return 0; |
720 | ||
93c08c32 | 721 | #ifdef CONFIG_INET |
2b2c009e JO |
722 | fail_ifa: |
723 | pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, | |
724 | &local->network_latency_notifier); | |
725 | rtnl_lock(); | |
93c08c32 | 726 | #endif |
10f644a4 JB |
727 | fail_pm_qos: |
728 | ieee80211_led_exit(local); | |
729 | ieee80211_remove_interfaces(local); | |
10f644a4 | 730 | fail_rate: |
f0706e82 | 731 | rtnl_unlock(); |
d4c4a9a1 | 732 | ieee80211_wep_free(local); |
f0706e82 | 733 | sta_info_stop(local); |
10f644a4 | 734 | fail_sta_info: |
42935eca | 735 | destroy_workqueue(local->workqueue); |
10f644a4 | 736 | fail_workqueue: |
f0706e82 | 737 | wiphy_unregister(local->hw.wiphy); |
10f644a4 | 738 | fail_wiphy_register: |
11ba964d | 739 | kfree(local->int_scan_req); |
f0706e82 JB |
740 | return result; |
741 | } | |
742 | EXPORT_SYMBOL(ieee80211_register_hw); | |
743 | ||
f0706e82 JB |
744 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
745 | { | |
746 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 JB |
747 | |
748 | tasklet_kill(&local->tx_pending_tasklet); | |
749 | tasklet_kill(&local->tasklet); | |
750 | ||
10f644a4 JB |
751 | pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, |
752 | &local->network_latency_notifier); | |
26b36cfe | 753 | #ifdef CONFIG_INET |
2b2c009e | 754 | unregister_inetaddr_notifier(&local->ifa_notifier); |
26b36cfe | 755 | #endif |
10f644a4 | 756 | |
f0706e82 JB |
757 | rtnl_lock(); |
758 | ||
79010420 JB |
759 | /* |
760 | * At this point, interface list manipulations are fine | |
761 | * because the driver cannot be handing us frames any | |
762 | * more and the tasklet is killed. | |
763 | */ | |
75636525 | 764 | ieee80211_remove_interfaces(local); |
5b2812e9 | 765 | |
f0706e82 JB |
766 | rtnl_unlock(); |
767 | ||
3ac64bee JB |
768 | cancel_work_sync(&local->reconfig_filter); |
769 | ||
f0706e82 JB |
770 | ieee80211_clear_tx_pending(local); |
771 | sta_info_stop(local); | |
772 | rate_control_deinitialize(local); | |
773 | ||
f64f9e71 JP |
774 | if (skb_queue_len(&local->skb_queue) || |
775 | skb_queue_len(&local->skb_queue_unreliable)) | |
f0706e82 | 776 | printk(KERN_WARNING "%s: skb_queue not empty\n", |
dd1cd4c6 | 777 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
778 | skb_queue_purge(&local->skb_queue); |
779 | skb_queue_purge(&local->skb_queue_unreliable); | |
780 | ||
42935eca | 781 | destroy_workqueue(local->workqueue); |
f0706e82 JB |
782 | wiphy_unregister(local->hw.wiphy); |
783 | ieee80211_wep_free(local); | |
784 | ieee80211_led_exit(local); | |
5ba63533 | 785 | kfree(local->int_scan_req); |
f0706e82 JB |
786 | } |
787 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
788 | ||
789 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
790 | { | |
791 | struct ieee80211_local *local = hw_to_local(hw); | |
792 | ||
c771c9d8 | 793 | mutex_destroy(&local->iflist_mtx); |
f3b85252 | 794 | mutex_destroy(&local->scan_mtx); |
c771c9d8 | 795 | |
f0706e82 JB |
796 | wiphy_free(local->hw.wiphy); |
797 | } | |
798 | EXPORT_SYMBOL(ieee80211_free_hw); | |
799 | ||
f0706e82 JB |
800 | static int __init ieee80211_init(void) |
801 | { | |
802 | struct sk_buff *skb; | |
803 | int ret; | |
804 | ||
e039fa4a JB |
805 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
806 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
c6a1fa12 | 807 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); |
f0706e82 | 808 | |
cccf129f FF |
809 | ret = rc80211_minstrel_init(); |
810 | if (ret) | |
811 | return ret; | |
812 | ||
ec8aa669 FF |
813 | ret = rc80211_minstrel_ht_init(); |
814 | if (ret) | |
815 | goto err_minstrel; | |
816 | ||
4b475898 | 817 | ret = rc80211_pid_init(); |
ad018375 | 818 | if (ret) |
47846c9b | 819 | goto err_pid; |
f0706e82 | 820 | |
47846c9b JB |
821 | ret = ieee80211_iface_init(); |
822 | if (ret) | |
823 | goto err_netdev; | |
e9f207f0 | 824 | |
f0706e82 | 825 | return 0; |
47846c9b JB |
826 | err_netdev: |
827 | rc80211_pid_exit(); | |
828 | err_pid: | |
ec8aa669 FF |
829 | rc80211_minstrel_ht_exit(); |
830 | err_minstrel: | |
47846c9b JB |
831 | rc80211_minstrel_exit(); |
832 | ||
833 | return ret; | |
f0706e82 JB |
834 | } |
835 | ||
f0706e82 JB |
836 | static void __exit ieee80211_exit(void) |
837 | { | |
4b475898 | 838 | rc80211_pid_exit(); |
ec8aa669 | 839 | rc80211_minstrel_ht_exit(); |
cccf129f | 840 | rc80211_minstrel_exit(); |
ac71c691 | 841 | |
3b96766f JB |
842 | /* |
843 | * For key todo, it'll be empty by now but the work | |
844 | * might still be scheduled. | |
845 | */ | |
846 | flush_scheduled_work(); | |
847 | ||
f7a92144 LCC |
848 | if (mesh_allocated) |
849 | ieee80211s_stop(); | |
902acc78 | 850 | |
47846c9b | 851 | ieee80211_iface_exit(); |
f0706e82 JB |
852 | } |
853 | ||
854 | ||
ca9938fe | 855 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
856 | module_exit(ieee80211_exit); |
857 | ||
858 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
859 | MODULE_LICENSE("GPL"); |