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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> | |
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> |
10f644a4 | 24 | #include <linux/pm_qos_params.h> |
881d966b | 25 | #include <net/net_namespace.h> |
f0706e82 JB |
26 | #include <net/cfg80211.h> |
27 | ||
f0706e82 | 28 | #include "ieee80211_i.h" |
2c8dccc7 | 29 | #include "rate.h" |
f7a92144 | 30 | #include "mesh.h" |
f0706e82 | 31 | #include "wep.h" |
f0706e82 JB |
32 | #include "wme.h" |
33 | #include "aes_ccm.h" | |
2c8dccc7 | 34 | #include "led.h" |
e0eb6859 | 35 | #include "cfg.h" |
e9f207f0 JB |
36 | #include "debugfs.h" |
37 | #include "debugfs_netdev.h" | |
f0706e82 | 38 | |
b306f453 JB |
39 | /* |
40 | * For seeing transmitted packets on monitor interfaces | |
41 | * we have a radiotap header too. | |
42 | */ | |
43 | struct ieee80211_tx_status_rtap_hdr { | |
44 | struct ieee80211_radiotap_header hdr; | |
e6a9854b JB |
45 | u8 rate; |
46 | u8 padding_for_rate; | |
b306f453 JB |
47 | __le16 tx_flags; |
48 | u8 data_retries; | |
49 | } __attribute__ ((packed)); | |
50 | ||
f0706e82 | 51 | |
4150c572 | 52 | /* must be called under mdev tx lock */ |
0d143fe1 | 53 | void ieee80211_configure_filter(struct ieee80211_local *local) |
4150c572 JB |
54 | { |
55 | unsigned int changed_flags; | |
56 | unsigned int new_flags = 0; | |
57 | ||
53918994 | 58 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
59 | new_flags |= FIF_PROMISC_IN_BSS; |
60 | ||
53918994 | 61 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
62 | new_flags |= FIF_ALLMULTI; |
63 | ||
64 | if (local->monitors) | |
8cc9a739 MW |
65 | new_flags |= FIF_BCN_PRBRESP_PROMISC; |
66 | ||
67 | if (local->fif_fcsfail) | |
68 | new_flags |= FIF_FCSFAIL; | |
69 | ||
70 | if (local->fif_plcpfail) | |
71 | new_flags |= FIF_PLCPFAIL; | |
72 | ||
73 | if (local->fif_control) | |
74 | new_flags |= FIF_CONTROL; | |
75 | ||
76 | if (local->fif_other_bss) | |
77 | new_flags |= FIF_OTHER_BSS; | |
4150c572 JB |
78 | |
79 | changed_flags = local->filter_flags ^ new_flags; | |
80 | ||
81 | /* be a bit nasty */ | |
82 | new_flags |= (1<<31); | |
83 | ||
84 | local->ops->configure_filter(local_to_hw(local), | |
85 | changed_flags, &new_flags, | |
86 | local->mdev->mc_count, | |
87 | local->mdev->mc_list); | |
88 | ||
89 | WARN_ON(new_flags & (1<<31)); | |
90 | ||
91 | local->filter_flags = new_flags & ~(1<<31); | |
92 | } | |
93 | ||
b2c258fb | 94 | /* master interface */ |
f0706e82 | 95 | |
0d143fe1 JB |
96 | static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr) |
97 | { | |
98 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
99 | return ETH_ALEN; | |
100 | } | |
101 | ||
102 | static const struct header_ops ieee80211_header_ops = { | |
103 | .create = eth_header, | |
104 | .parse = header_parse_80211, | |
105 | .rebuild = eth_rebuild_header, | |
106 | .cache = eth_header_cache, | |
107 | .cache_update = eth_header_cache_update, | |
108 | }; | |
109 | ||
b2c258fb JB |
110 | static int ieee80211_master_open(struct net_device *dev) |
111 | { | |
133b8226 JB |
112 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
113 | struct ieee80211_local *local = mpriv->local; | |
b2c258fb JB |
114 | struct ieee80211_sub_if_data *sdata; |
115 | int res = -EOPNOTSUPP; | |
f0706e82 | 116 | |
79010420 JB |
117 | /* we hold the RTNL here so can safely walk the list */ |
118 | list_for_each_entry(sdata, &local->interfaces, list) { | |
3e122be0 | 119 | if (netif_running(sdata->dev)) { |
b2c258fb JB |
120 | res = 0; |
121 | break; | |
122 | } | |
123 | } | |
36d6825b JB |
124 | |
125 | if (res) | |
126 | return res; | |
127 | ||
51cb6db0 | 128 | netif_tx_start_all_queues(local->mdev); |
36d6825b JB |
129 | |
130 | return 0; | |
b2c258fb | 131 | } |
f0706e82 | 132 | |
b2c258fb | 133 | static int ieee80211_master_stop(struct net_device *dev) |
f0706e82 | 134 | { |
133b8226 JB |
135 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
136 | struct ieee80211_local *local = mpriv->local; | |
b2c258fb | 137 | struct ieee80211_sub_if_data *sdata; |
f0706e82 | 138 | |
79010420 JB |
139 | /* we hold the RTNL here so can safely walk the list */ |
140 | list_for_each_entry(sdata, &local->interfaces, list) | |
3e122be0 | 141 | if (netif_running(sdata->dev)) |
b2c258fb | 142 | dev_close(sdata->dev); |
f0706e82 | 143 | |
b2c258fb JB |
144 | return 0; |
145 | } | |
f0706e82 | 146 | |
4150c572 JB |
147 | static void ieee80211_master_set_multicast_list(struct net_device *dev) |
148 | { | |
133b8226 JB |
149 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
150 | struct ieee80211_local *local = mpriv->local; | |
4150c572 JB |
151 | |
152 | ieee80211_configure_filter(local); | |
153 | } | |
154 | ||
e8975581 | 155 | int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) |
b2c258fb | 156 | { |
b2c258fb JB |
157 | struct ieee80211_channel *chan; |
158 | int ret = 0; | |
e8975581 | 159 | int power; |
094d05dc | 160 | enum nl80211_channel_type channel_type; |
f0706e82 | 161 | |
cb121bad JB |
162 | might_sleep(); |
163 | ||
72bdcf34 | 164 | if (local->sw_scanning) { |
b2c258fb | 165 | chan = local->scan_channel; |
094d05dc | 166 | channel_type = NL80211_CHAN_NO_HT; |
72bdcf34 | 167 | } else { |
b2c258fb | 168 | chan = local->oper_channel; |
094d05dc | 169 | channel_type = local->oper_channel_type; |
72bdcf34 | 170 | } |
f0706e82 | 171 | |
72bdcf34 | 172 | if (chan != local->hw.conf.channel || |
4797938c | 173 | channel_type != local->hw.conf.channel_type) { |
e8975581 | 174 | local->hw.conf.channel = chan; |
4797938c | 175 | local->hw.conf.channel_type = channel_type; |
e8975581 JB |
176 | changed |= IEEE80211_CONF_CHANGE_CHANNEL; |
177 | } | |
8318d78a | 178 | |
a8302de9 | 179 | if (local->sw_scanning) |
e8975581 | 180 | power = chan->max_power; |
8318d78a | 181 | else |
a8302de9 VT |
182 | power = local->power_constr_level ? |
183 | (chan->max_power - local->power_constr_level) : | |
184 | chan->max_power; | |
185 | ||
47afbaf5 | 186 | if (local->user_power_level >= 0) |
a8302de9 VT |
187 | power = min(power, local->user_power_level); |
188 | ||
e8975581 JB |
189 | if (local->hw.conf.power_level != power) { |
190 | changed |= IEEE80211_CONF_CHANGE_POWER; | |
191 | local->hw.conf.power_level = power; | |
192 | } | |
b2c258fb | 193 | |
e8975581 JB |
194 | if (changed && local->open_count) { |
195 | ret = local->ops->config(local_to_hw(local), changed); | |
d73782fd | 196 | /* |
447107fb | 197 | * Goal: |
d73782fd JB |
198 | * HW reconfiguration should never fail, the driver has told |
199 | * us what it can support so it should live up to that promise. | |
447107fb RC |
200 | * |
201 | * Current status: | |
202 | * rfkill is not integrated with mac80211 and a | |
203 | * configuration command can thus fail if hardware rfkill | |
204 | * is enabled | |
205 | * | |
206 | * FIXME: integrate rfkill with mac80211 and then add this | |
207 | * WARN_ON() back | |
208 | * | |
d73782fd | 209 | */ |
447107fb | 210 | /* WARN_ON(ret); */ |
d73782fd | 211 | } |
f0706e82 | 212 | |
b2c258fb JB |
213 | return ret; |
214 | } | |
f0706e82 | 215 | |
471b3efd JB |
216 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
217 | u32 changed) | |
d9430a32 | 218 | { |
471b3efd JB |
219 | struct ieee80211_local *local = sdata->local; |
220 | ||
221 | if (!changed) | |
222 | return; | |
223 | ||
2d0ddec5 JB |
224 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
225 | sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; | |
226 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
227 | sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; | |
228 | else if (sdata->vif.type == NL80211_IFTYPE_AP) | |
229 | sdata->vif.bss_conf.bssid = sdata->dev->dev_addr; | |
230 | else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
231 | static const u8 zero[ETH_ALEN] = { 0 }; | |
232 | sdata->vif.bss_conf.bssid = zero; | |
233 | } else { | |
234 | WARN_ON(1); | |
235 | return; | |
236 | } | |
237 | ||
238 | switch (sdata->vif.type) { | |
239 | case NL80211_IFTYPE_AP: | |
240 | case NL80211_IFTYPE_ADHOC: | |
241 | case NL80211_IFTYPE_MESH_POINT: | |
242 | break; | |
243 | default: | |
244 | /* do not warn to simplify caller in scan.c */ | |
245 | changed &= ~BSS_CHANGED_BEACON_ENABLED; | |
246 | if (WARN_ON(changed & BSS_CHANGED_BEACON)) | |
247 | return; | |
248 | break; | |
249 | } | |
250 | ||
251 | if (changed & BSS_CHANGED_BEACON_ENABLED) { | |
252 | if (local->sw_scanning) { | |
253 | sdata->vif.bss_conf.enable_beacon = false; | |
254 | } else { | |
255 | /* | |
256 | * Beacon should be enabled, but AP mode must | |
257 | * check whether there is a beacon configured. | |
258 | */ | |
259 | switch (sdata->vif.type) { | |
260 | case NL80211_IFTYPE_AP: | |
261 | sdata->vif.bss_conf.enable_beacon = | |
262 | !!rcu_dereference(sdata->u.ap.beacon); | |
263 | break; | |
264 | case NL80211_IFTYPE_ADHOC: | |
265 | sdata->vif.bss_conf.enable_beacon = | |
266 | !!rcu_dereference(sdata->u.ibss.presp); | |
267 | break; | |
268 | case NL80211_IFTYPE_MESH_POINT: | |
269 | sdata->vif.bss_conf.enable_beacon = true; | |
270 | break; | |
271 | default: | |
272 | /* not reached */ | |
273 | WARN_ON(1); | |
274 | break; | |
275 | } | |
276 | } | |
277 | } | |
278 | ||
471b3efd JB |
279 | if (local->ops->bss_info_changed) |
280 | local->ops->bss_info_changed(local_to_hw(local), | |
281 | &sdata->vif, | |
bda3933a | 282 | &sdata->vif.bss_conf, |
471b3efd | 283 | changed); |
57c4d7b4 JB |
284 | |
285 | /* | |
286 | * DEPRECATED | |
287 | * | |
288 | * ~changed is just there to not do this at resume time | |
289 | */ | |
290 | if (changed & BSS_CHANGED_BEACON_INT && ~changed) { | |
291 | local->hw.conf.beacon_int = sdata->vif.bss_conf.beacon_int; | |
292 | ieee80211_hw_config(local, | |
293 | _IEEE80211_CONF_CHANGE_BEACON_INTERVAL); | |
294 | } | |
d9430a32 DD |
295 | } |
296 | ||
f698d856 | 297 | u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
d9430a32 | 298 | { |
bda3933a JB |
299 | sdata->vif.bss_conf.use_cts_prot = false; |
300 | sdata->vif.bss_conf.use_short_preamble = false; | |
301 | sdata->vif.bss_conf.use_short_slot = false; | |
7a5158ef JB |
302 | return BSS_CHANGED_ERP_CTS_PROT | |
303 | BSS_CHANGED_ERP_PREAMBLE | | |
304 | BSS_CHANGED_ERP_SLOT; | |
d9430a32 DD |
305 | } |
306 | ||
f0706e82 | 307 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 308 | struct sk_buff *skb) |
f0706e82 JB |
309 | { |
310 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 311 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
312 | int tmp; |
313 | ||
314 | skb->dev = local->mdev; | |
f0706e82 | 315 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 316 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
317 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
318 | tmp = skb_queue_len(&local->skb_queue) + | |
319 | skb_queue_len(&local->skb_queue_unreliable); | |
320 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
321 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
322 | dev_kfree_skb_irq(skb); |
323 | tmp--; | |
324 | I802_DEBUG_INC(local->tx_status_drop); | |
325 | } | |
326 | tasklet_schedule(&local->tasklet); | |
327 | } | |
328 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
329 | ||
330 | static void ieee80211_tasklet_handler(unsigned long data) | |
331 | { | |
332 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
333 | struct sk_buff *skb; | |
334 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 335 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
336 | |
337 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
338 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
339 | switch (skb->pkt_type) { | |
340 | case IEEE80211_RX_MSG: | |
341 | /* status is in skb->cb */ | |
342 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 343 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
344 | * netstack. */ |
345 | skb->pkt_type = 0; | |
346 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
347 | break; | |
348 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 349 | skb->pkt_type = 0; |
e039fa4a | 350 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 351 | break; |
eadc8d9e RR |
352 | case IEEE80211_DELBA_MSG: |
353 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
354 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
355 | ra_tid->ra, ra_tid->tid); | |
356 | dev_kfree_skb(skb); | |
357 | break; | |
358 | case IEEE80211_ADDBA_MSG: | |
359 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
360 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
361 | ra_tid->ra, ra_tid->tid); | |
362 | dev_kfree_skb(skb); | |
363 | break ; | |
f4ea83dd | 364 | default: |
5e3f3089 LF |
365 | WARN(1, "mac80211: Packet is of unknown type %d\n", |
366 | skb->pkt_type); | |
f0706e82 JB |
367 | dev_kfree_skb(skb); |
368 | break; | |
369 | } | |
370 | } | |
371 | } | |
372 | ||
f0706e82 JB |
373 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
374 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
375 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
d0f09804 | 376 | */ |
f0706e82 JB |
377 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, |
378 | struct ieee80211_key *key, | |
e039fa4a | 379 | struct sk_buff *skb) |
f0706e82 | 380 | { |
62bf1d76 HH |
381 | unsigned int hdrlen, iv_len, mic_len; |
382 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
f0706e82 | 383 | |
62bf1d76 | 384 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
f0706e82 JB |
385 | |
386 | if (!key) | |
387 | goto no_key; | |
388 | ||
8f20fc24 | 389 | switch (key->conf.alg) { |
f0706e82 JB |
390 | case ALG_WEP: |
391 | iv_len = WEP_IV_LEN; | |
392 | mic_len = WEP_ICV_LEN; | |
393 | break; | |
394 | case ALG_TKIP: | |
395 | iv_len = TKIP_IV_LEN; | |
396 | mic_len = TKIP_ICV_LEN; | |
397 | break; | |
398 | case ALG_CCMP: | |
399 | iv_len = CCMP_HDR_LEN; | |
400 | mic_len = CCMP_MIC_LEN; | |
401 | break; | |
402 | default: | |
403 | goto no_key; | |
404 | } | |
405 | ||
62bf1d76 | 406 | if (skb->len >= hdrlen + mic_len && |
11a843b7 | 407 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 | 408 | skb_trim(skb, skb->len - mic_len); |
62bf1d76 | 409 | if (skb->len >= hdrlen + iv_len) { |
f0706e82 | 410 | memmove(skb->data + iv_len, skb->data, hdrlen); |
62bf1d76 | 411 | hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len); |
f0706e82 JB |
412 | } |
413 | ||
414 | no_key: | |
62bf1d76 HH |
415 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
416 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
417 | memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, | |
418 | hdrlen - IEEE80211_QOS_CTL_LEN); | |
419 | skb_pull(skb, IEEE80211_QOS_CTL_LEN); | |
f0706e82 JB |
420 | } |
421 | } | |
422 | ||
d46e144b JB |
423 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
424 | struct sta_info *sta, | |
e039fa4a | 425 | struct sk_buff *skb) |
d46e144b JB |
426 | { |
427 | sta->tx_filtered_count++; | |
428 | ||
429 | /* | |
430 | * Clear the TX filter mask for this STA when sending the next | |
431 | * packet. If the STA went to power save mode, this will happen | |
f6d97104 | 432 | * when it wakes up for the next time. |
d46e144b | 433 | */ |
07346f81 | 434 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
435 | |
436 | /* | |
437 | * This code races in the following way: | |
438 | * | |
439 | * (1) STA sends frame indicating it will go to sleep and does so | |
440 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
441 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
442 | * (4) we get TX status before having processed the frame and | |
443 | * knowing that the STA has gone to sleep. | |
444 | * | |
445 | * This is actually quite unlikely even when both those events are | |
446 | * processed from interrupts coming in quickly after one another or | |
447 | * even at the same time because we queue both TX status events and | |
448 | * RX frames to be processed by a tasklet and process them in the | |
449 | * same order that they were received or TX status last. Hence, there | |
450 | * is no race as long as the frame RX is processed before the next TX | |
451 | * status, which drivers can ensure, see below. | |
452 | * | |
453 | * Note that this can only happen if the hardware or firmware can | |
454 | * actually add STAs to the filter list, if this is done by the | |
455 | * driver in response to set_tim() (which will only reduce the race | |
456 | * this whole filtering tries to solve, not completely solve it) | |
457 | * this situation cannot happen. | |
458 | * | |
459 | * To completely solve this race drivers need to make sure that they | |
460 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
461 | * functions and | |
462 | * (b) always process RX events before TX status events if ordering | |
463 | * can be unknown, for example with different interrupt status | |
464 | * bits. | |
465 | */ | |
07346f81 | 466 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 467 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 468 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
469 | skb_queue_tail(&sta->tx_filtered, skb); |
470 | return; | |
471 | } | |
472 | ||
8b30b1fe | 473 | if (!test_sta_flags(sta, WLAN_STA_PS) && !skb->requeue) { |
d46e144b | 474 | /* Software retry the packet once */ |
8b30b1fe | 475 | skb->requeue = 1; |
e039fa4a | 476 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
477 | dev_queue_xmit(skb); |
478 | return; | |
479 | } | |
480 | ||
f4ea83dd | 481 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
d46e144b JB |
482 | if (net_ratelimit()) |
483 | printk(KERN_DEBUG "%s: dropped TX filtered frame, " | |
484 | "queue_len=%d PS=%d @%lu\n", | |
485 | wiphy_name(local->hw.wiphy), | |
486 | skb_queue_len(&sta->tx_filtered), | |
07346f81 | 487 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
f4ea83dd | 488 | #endif |
d46e144b JB |
489 | dev_kfree_skb(skb); |
490 | } | |
491 | ||
e039fa4a | 492 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
493 | { |
494 | struct sk_buff *skb2; | |
495 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
496 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 497 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 498 | u16 frag, type; |
429a3805 | 499 | __le16 fc; |
4b7679a5 | 500 | struct ieee80211_supported_band *sband; |
b306f453 JB |
501 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
502 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 503 | struct net_device *prev_dev = NULL; |
429a3805 | 504 | struct sta_info *sta; |
e6a9854b JB |
505 | int retry_count = -1, i; |
506 | ||
507 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
508 | /* the HW cannot have attempted that rate */ | |
509 | if (i >= hw->max_rates) { | |
510 | info->status.rates[i].idx = -1; | |
511 | info->status.rates[i].count = 0; | |
512 | } | |
513 | ||
514 | retry_count += info->status.rates[i].count; | |
515 | } | |
516 | if (retry_count < 0) | |
517 | retry_count = 0; | |
f0706e82 | 518 | |
d0709a65 JB |
519 | rcu_read_lock(); |
520 | ||
e6a9854b JB |
521 | sband = local->hw.wiphy->bands[info->band]; |
522 | ||
95dac040 JB |
523 | sta = sta_info_get(local, hdr->addr1); |
524 | ||
525 | if (sta) { | |
e6a9854b | 526 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
95dac040 JB |
527 | test_sta_flags(sta, WLAN_STA_PS)) { |
528 | /* | |
529 | * The STA is in power save mode, so assume | |
530 | * that this TX packet failed because of that. | |
531 | */ | |
532 | ieee80211_handle_filtered_frame(local, sta, skb); | |
533 | rcu_read_unlock(); | |
534 | return; | |
f0706e82 | 535 | } |
f0706e82 | 536 | |
95dac040 JB |
537 | fc = hdr->frame_control; |
538 | ||
539 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && | |
540 | (ieee80211_is_data_qos(fc))) { | |
541 | u16 tid, ssn; | |
542 | u8 *qc; | |
429a3805 | 543 | |
429a3805 RR |
544 | qc = ieee80211_get_qos_ctl(hdr); |
545 | tid = qc[0] & 0xf; | |
546 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
547 | & IEEE80211_SCTL_SEQ); | |
f698d856 | 548 | ieee80211_send_bar(sta->sdata, hdr->addr1, |
429a3805 RR |
549 | tid, ssn); |
550 | } | |
429a3805 | 551 | |
95dac040 | 552 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
e039fa4a | 553 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 554 | rcu_read_unlock(); |
f0706e82 | 555 | return; |
95dac040 | 556 | } else { |
e6a9854b | 557 | if (!(info->flags & IEEE80211_TX_STAT_ACK)) |
95dac040 | 558 | sta->tx_retry_failed++; |
e6a9854b | 559 | sta->tx_retry_count += retry_count; |
f0706e82 | 560 | } |
95dac040 | 561 | |
4b7679a5 | 562 | rate_control_tx_status(local, sband, sta, skb); |
95dac040 | 563 | } |
f0706e82 | 564 | |
d0709a65 JB |
565 | rcu_read_unlock(); |
566 | ||
f0706e82 JB |
567 | ieee80211_led_tx(local, 0); |
568 | ||
569 | /* SNMP counters | |
570 | * Fragments are passed to low-level drivers as separate skbs, so these | |
571 | * are actually fragments, not frames. Update frame counters only for | |
572 | * the first fragment of the frame. */ | |
573 | ||
574 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
575 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
576 | ||
e039fa4a | 577 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
578 | if (frag == 0) { |
579 | local->dot11TransmittedFrameCount++; | |
580 | if (is_multicast_ether_addr(hdr->addr1)) | |
581 | local->dot11MulticastTransmittedFrameCount++; | |
e6a9854b | 582 | if (retry_count > 0) |
f0706e82 | 583 | local->dot11RetryCount++; |
e6a9854b | 584 | if (retry_count > 1) |
f0706e82 JB |
585 | local->dot11MultipleRetryCount++; |
586 | } | |
587 | ||
588 | /* This counter shall be incremented for an acknowledged MPDU | |
589 | * with an individual address in the address 1 field or an MPDU | |
590 | * with a multicast address in the address 1 field of type Data | |
591 | * or Management. */ | |
592 | if (!is_multicast_ether_addr(hdr->addr1) || | |
593 | type == IEEE80211_FTYPE_DATA || | |
594 | type == IEEE80211_FTYPE_MGMT) | |
595 | local->dot11TransmittedFragmentCount++; | |
596 | } else { | |
597 | if (frag == 0) | |
598 | local->dot11FailedCount++; | |
599 | } | |
600 | ||
b306f453 JB |
601 | /* this was a transmitted frame, but now we want to reuse it */ |
602 | skb_orphan(skb); | |
603 | ||
3d30d949 MW |
604 | /* |
605 | * This is a bit racy but we can avoid a lot of work | |
606 | * with this test... | |
607 | */ | |
608 | if (!local->monitors && !local->cooked_mntrs) { | |
f0706e82 JB |
609 | dev_kfree_skb(skb); |
610 | return; | |
611 | } | |
612 | ||
b306f453 | 613 | /* send frame to monitor interfaces now */ |
f0706e82 | 614 | |
b306f453 JB |
615 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
616 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
617 | dev_kfree_skb(skb); |
618 | return; | |
619 | } | |
f0706e82 | 620 | |
988c0f72 | 621 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
622 | skb_push(skb, sizeof(*rthdr)); |
623 | ||
624 | memset(rthdr, 0, sizeof(*rthdr)); | |
625 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
626 | rthdr->hdr.it_present = | |
627 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
e6a9854b JB |
628 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES) | |
629 | (1 << IEEE80211_RADIOTAP_RATE)); | |
b306f453 | 630 | |
e039fa4a | 631 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
632 | !is_multicast_ether_addr(hdr->addr1)) |
633 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
634 | ||
e6a9854b JB |
635 | /* |
636 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
637 | * extensions proposal contains, we can actually report | |
638 | * the whole set of tries we did. | |
639 | */ | |
640 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || | |
641 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) | |
b306f453 | 642 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e6a9854b | 643 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b306f453 | 644 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
e6a9854b JB |
645 | if (info->status.rates[0].idx >= 0 && |
646 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) | |
647 | rthdr->rate = sband->bitrates[ | |
648 | info->status.rates[0].idx].bitrate / 5; | |
b306f453 | 649 | |
e6a9854b JB |
650 | /* for now report the total retry_count */ |
651 | rthdr->data_retries = retry_count; | |
b306f453 | 652 | |
3d30d949 MW |
653 | /* XXX: is this sufficient for BPF? */ |
654 | skb_set_mac_header(skb, 0); | |
655 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
656 | skb->pkt_type = PACKET_OTHERHOST; | |
657 | skb->protocol = htons(ETH_P_802_2); | |
658 | memset(skb->cb, 0, sizeof(skb->cb)); | |
659 | ||
79010420 | 660 | rcu_read_lock(); |
79010420 | 661 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
05c914fe | 662 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
b306f453 JB |
663 | if (!netif_running(sdata->dev)) |
664 | continue; | |
3d30d949 MW |
665 | |
666 | if (prev_dev) { | |
79010420 | 667 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
668 | if (skb2) { |
669 | skb2->dev = prev_dev; | |
670 | netif_rx(skb2); | |
671 | } | |
672 | } | |
673 | ||
674 | prev_dev = sdata->dev; | |
b306f453 JB |
675 | } |
676 | } | |
3d30d949 MW |
677 | if (prev_dev) { |
678 | skb->dev = prev_dev; | |
679 | netif_rx(skb); | |
680 | skb = NULL; | |
681 | } | |
79010420 | 682 | rcu_read_unlock(); |
3d30d949 | 683 | dev_kfree_skb(skb); |
f0706e82 JB |
684 | } |
685 | EXPORT_SYMBOL(ieee80211_tx_status); | |
686 | ||
f2753ddb JB |
687 | static void ieee80211_restart_work(struct work_struct *work) |
688 | { | |
689 | struct ieee80211_local *local = | |
690 | container_of(work, struct ieee80211_local, restart_work); | |
691 | ||
692 | rtnl_lock(); | |
693 | ieee80211_reconfig(local); | |
694 | rtnl_unlock(); | |
695 | } | |
696 | ||
697 | void ieee80211_restart_hw(struct ieee80211_hw *hw) | |
698 | { | |
699 | struct ieee80211_local *local = hw_to_local(hw); | |
700 | ||
701 | /* use this reason, __ieee80211_resume will unblock it */ | |
702 | ieee80211_stop_queues_by_reason(hw, | |
703 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
704 | ||
705 | schedule_work(&local->restart_work); | |
706 | } | |
707 | EXPORT_SYMBOL(ieee80211_restart_hw); | |
708 | ||
f0706e82 JB |
709 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
710 | const struct ieee80211_ops *ops) | |
711 | { | |
f0706e82 | 712 | struct ieee80211_local *local; |
96f5e66e | 713 | int priv_size, i; |
f0706e82 JB |
714 | struct wiphy *wiphy; |
715 | ||
716 | /* Ensure 32-byte alignment of our private data and hw private data. | |
717 | * We use the wiphy priv data for both our ieee80211_local and for | |
718 | * the driver's private data | |
719 | * | |
720 | * In memory it'll be like this: | |
721 | * | |
722 | * +-------------------------+ | |
723 | * | struct wiphy | | |
724 | * +-------------------------+ | |
725 | * | struct ieee80211_local | | |
726 | * +-------------------------+ | |
727 | * | driver's private data | | |
728 | * +-------------------------+ | |
729 | * | |
730 | */ | |
731 | priv_size = ((sizeof(struct ieee80211_local) + | |
732 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
733 | priv_data_len; | |
734 | ||
735 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
736 | ||
737 | if (!wiphy) | |
738 | return NULL; | |
739 | ||
740 | wiphy->privid = mac80211_wiphy_privid; | |
18a83659 | 741 | |
00d3f14c JB |
742 | /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */ |
743 | wiphy->bss_priv_size = sizeof(struct ieee80211_bss) - | |
744 | sizeof(struct cfg80211_bss); | |
f0706e82 JB |
745 | |
746 | local = wiphy_priv(wiphy); | |
de95a54b | 747 | |
f0706e82 JB |
748 | local->hw.wiphy = wiphy; |
749 | ||
750 | local->hw.priv = (char *)local + | |
751 | ((sizeof(struct ieee80211_local) + | |
752 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
753 | ||
4480f15c | 754 | BUG_ON(!ops->tx); |
4150c572 JB |
755 | BUG_ON(!ops->start); |
756 | BUG_ON(!ops->stop); | |
4480f15c JB |
757 | BUG_ON(!ops->config); |
758 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
759 | BUG_ON(!ops->remove_interface); |
760 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
761 | local->ops = ops; |
762 | ||
e6a9854b JB |
763 | /* set up some defaults */ |
764 | local->hw.queues = 1; | |
765 | local->hw.max_rates = 1; | |
b9a5f8ca JM |
766 | local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; |
767 | local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; | |
e8975581 | 768 | local->hw.conf.radio_enabled = true; |
c428c892 | 769 | local->user_power_level = -1; |
f0706e82 | 770 | |
79010420 | 771 | INIT_LIST_HEAD(&local->interfaces); |
c771c9d8 | 772 | mutex_init(&local->iflist_mtx); |
f3b85252 | 773 | mutex_init(&local->scan_mtx); |
f0706e82 | 774 | |
b16bd15c JB |
775 | spin_lock_init(&local->key_lock); |
776 | ||
ce7c9111 KV |
777 | spin_lock_init(&local->queue_stop_reason_lock); |
778 | ||
c2b13452 | 779 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
f0706e82 | 780 | |
f2753ddb JB |
781 | INIT_WORK(&local->restart_work, ieee80211_restart_work); |
782 | ||
520eb820 KV |
783 | INIT_WORK(&local->dynamic_ps_enable_work, |
784 | ieee80211_dynamic_ps_enable_work); | |
785 | INIT_WORK(&local->dynamic_ps_disable_work, | |
786 | ieee80211_dynamic_ps_disable_work); | |
787 | setup_timer(&local->dynamic_ps_timer, | |
788 | ieee80211_dynamic_ps_timer, (unsigned long) local); | |
789 | ||
f0706e82 JB |
790 | sta_info_init(local); |
791 | ||
2a577d98 JB |
792 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) |
793 | skb_queue_head_init(&local->pending[i]); | |
f0706e82 JB |
794 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
795 | (unsigned long)local); | |
796 | tasklet_disable(&local->tx_pending_tasklet); | |
797 | ||
798 | tasklet_init(&local->tasklet, | |
799 | ieee80211_tasklet_handler, | |
800 | (unsigned long) local); | |
801 | tasklet_disable(&local->tasklet); | |
802 | ||
803 | skb_queue_head_init(&local->skb_queue); | |
804 | skb_queue_head_init(&local->skb_queue_unreliable); | |
805 | ||
cd8ffc80 JB |
806 | spin_lock_init(&local->ampdu_lock); |
807 | ||
f0706e82 JB |
808 | return local_to_hw(local); |
809 | } | |
810 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
811 | ||
7230645e JB |
812 | static const struct net_device_ops ieee80211_master_ops = { |
813 | .ndo_start_xmit = ieee80211_master_start_xmit, | |
814 | .ndo_open = ieee80211_master_open, | |
815 | .ndo_stop = ieee80211_master_stop, | |
816 | .ndo_set_multicast_list = ieee80211_master_set_multicast_list, | |
817 | .ndo_select_queue = ieee80211_select_queue, | |
818 | }; | |
819 | ||
820 | static void ieee80211_master_setup(struct net_device *mdev) | |
821 | { | |
822 | mdev->type = ARPHRD_IEEE80211; | |
823 | mdev->netdev_ops = &ieee80211_master_ops; | |
824 | mdev->header_ops = &ieee80211_header_ops; | |
825 | mdev->tx_queue_len = 1000; | |
826 | mdev->addr_len = ETH_ALEN; | |
827 | } | |
828 | ||
f0706e82 JB |
829 | int ieee80211_register_hw(struct ieee80211_hw *hw) |
830 | { | |
831 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 | 832 | int result; |
8318d78a | 833 | enum ieee80211_band band; |
96d51056 | 834 | struct net_device *mdev; |
133b8226 | 835 | struct ieee80211_master_priv *mpriv; |
de95a54b | 836 | int channels, i, j, max_bitrates; |
5ef2d41a | 837 | bool supp_ht; |
25e47c18 JB |
838 | static const u32 cipher_suites[] = { |
839 | WLAN_CIPHER_SUITE_WEP40, | |
840 | WLAN_CIPHER_SUITE_WEP104, | |
841 | WLAN_CIPHER_SUITE_TKIP, | |
842 | WLAN_CIPHER_SUITE_CCMP, | |
843 | ||
844 | /* keep last -- depends on hw flags! */ | |
845 | WLAN_CIPHER_SUITE_AES_CMAC | |
846 | }; | |
8318d78a JB |
847 | |
848 | /* | |
849 | * generic code guarantees at least one band, | |
850 | * set this very early because much code assumes | |
851 | * that hw.conf.channel is assigned | |
852 | */ | |
2a519311 | 853 | channels = 0; |
de95a54b | 854 | max_bitrates = 0; |
5ef2d41a | 855 | supp_ht = false; |
8318d78a JB |
856 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
857 | struct ieee80211_supported_band *sband; | |
858 | ||
859 | sband = local->hw.wiphy->bands[band]; | |
de95a54b JB |
860 | if (!sband) |
861 | continue; | |
862 | if (!local->oper_channel) { | |
8318d78a JB |
863 | /* init channel we're on */ |
864 | local->hw.conf.channel = | |
865 | local->oper_channel = | |
866 | local->scan_channel = &sband->channels[0]; | |
8318d78a | 867 | } |
de95a54b JB |
868 | channels += sband->n_channels; |
869 | ||
870 | if (max_bitrates < sband->n_bitrates) | |
871 | max_bitrates = sband->n_bitrates; | |
5ef2d41a | 872 | supp_ht = supp_ht || sband->ht_cap.ht_supported; |
8318d78a | 873 | } |
f0706e82 | 874 | |
2a519311 JB |
875 | local->int_scan_req.n_channels = channels; |
876 | local->int_scan_req.channels = kzalloc(sizeof(void *) * channels, GFP_KERNEL); | |
877 | if (!local->int_scan_req.channels) | |
878 | return -ENOMEM; | |
879 | ||
f59ac048 LR |
880 | /* if low-level driver supports AP, we also support VLAN */ |
881 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) | |
882 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
883 | ||
884 | /* mac80211 always supports monitor */ | |
885 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); | |
886 | ||
77965c97 JB |
887 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
888 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; | |
889 | else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) | |
890 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; | |
891 | ||
de95a54b JB |
892 | /* |
893 | * Calculate scan IE length -- we need this to alloc | |
894 | * memory and to subtract from the driver limit. It | |
895 | * includes the (extended) supported rates and HT | |
896 | * information -- SSID is the driver's responsibility. | |
897 | */ | |
898 | local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ | |
5ef2d41a JB |
899 | if (supp_ht) |
900 | local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); | |
de95a54b JB |
901 | |
902 | if (!local->ops->hw_scan) { | |
903 | /* For hw_scan, driver needs to set these up. */ | |
904 | local->hw.wiphy->max_scan_ssids = 4; | |
905 | local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; | |
906 | } | |
907 | ||
908 | /* | |
909 | * If the driver supports any scan IEs, then assume the | |
910 | * limit includes the IEs mac80211 will add, otherwise | |
911 | * leave it at zero and let the driver sort it out; we | |
912 | * still pass our IEs to the driver but userspace will | |
913 | * not be allowed to in that case. | |
914 | */ | |
915 | if (local->hw.wiphy->max_scan_ie_len) | |
916 | local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; | |
917 | ||
25e47c18 JB |
918 | local->hw.wiphy->cipher_suites = cipher_suites; |
919 | local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); | |
920 | if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) | |
921 | local->hw.wiphy->n_cipher_suites--; | |
922 | ||
f0706e82 JB |
923 | result = wiphy_register(local->hw.wiphy); |
924 | if (result < 0) | |
2a519311 | 925 | goto fail_wiphy_register; |
f0706e82 | 926 | |
e2530083 JB |
927 | /* |
928 | * We use the number of queues for feature tests (QoS, HT) internally | |
929 | * so restrict them appropriately. | |
930 | */ | |
e2530083 JB |
931 | if (hw->queues > IEEE80211_MAX_QUEUES) |
932 | hw->queues = IEEE80211_MAX_QUEUES; | |
e2530083 | 933 | |
133b8226 | 934 | mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv), |
7230645e | 935 | "wmaster%d", ieee80211_master_setup, |
96f5e66e | 936 | hw->queues); |
96d51056 JB |
937 | if (!mdev) |
938 | goto fail_mdev_alloc; | |
939 | ||
133b8226 JB |
940 | mpriv = netdev_priv(mdev); |
941 | mpriv->local = local; | |
96d51056 JB |
942 | local->mdev = mdev; |
943 | ||
4ada424d | 944 | local->hw.workqueue = |
30d3ef41 | 945 | create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
946 | if (!local->hw.workqueue) { |
947 | result = -ENOMEM; | |
948 | goto fail_workqueue; | |
949 | } | |
950 | ||
b306f453 JB |
951 | /* |
952 | * The hardware needs headroom for sending the frame, | |
953 | * and we need some headroom for passing the frame to monitor | |
954 | * interfaces, but never both at the same time. | |
955 | */ | |
33ccad35 JB |
956 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
957 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 958 | |
e9f207f0 JB |
959 | debugfs_hw_add(local); |
960 | ||
ea95bba4 TW |
961 | if (local->hw.max_listen_interval == 0) |
962 | local->hw.max_listen_interval = 1; | |
963 | ||
964 | local->hw.conf.listen_interval = local->hw.max_listen_interval; | |
965 | ||
f0706e82 JB |
966 | result = sta_info_start(local); |
967 | if (result < 0) | |
968 | goto fail_sta_info; | |
969 | ||
d4c4a9a1 AJ |
970 | result = ieee80211_wep_init(local); |
971 | if (result < 0) { | |
972 | printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", | |
973 | wiphy_name(local->hw.wiphy), result); | |
974 | goto fail_wep; | |
975 | } | |
976 | ||
f0706e82 JB |
977 | rtnl_lock(); |
978 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
979 | if (result < 0) | |
980 | goto fail_dev; | |
981 | ||
982 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
983 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
076ae609 | 984 | local->mdev->features |= NETIF_F_NETNS_LOCAL; |
f0706e82 JB |
985 | |
986 | result = register_netdevice(local->mdev); | |
987 | if (result < 0) | |
988 | goto fail_dev; | |
989 | ||
830f9038 JB |
990 | result = ieee80211_init_rate_ctrl_alg(local, |
991 | hw->rate_control_algorithm); | |
f0706e82 JB |
992 | if (result < 0) { |
993 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 994 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
995 | goto fail_rate; |
996 | } | |
997 | ||
8dffff21 JB |
998 | /* add one default STA interface if supported */ |
999 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { | |
1000 | result = ieee80211_if_add(local, "wlan%d", NULL, | |
1001 | NL80211_IFTYPE_STATION, NULL); | |
1002 | if (result) | |
1003 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
1004 | wiphy_name(local->hw.wiphy)); | |
1005 | } | |
f0706e82 | 1006 | |
f0706e82 JB |
1007 | rtnl_unlock(); |
1008 | ||
1009 | ieee80211_led_init(local); | |
1010 | ||
2a519311 JB |
1011 | /* alloc internal scan request */ |
1012 | i = 0; | |
1013 | local->int_scan_req.ssids = &local->scan_ssid; | |
1014 | local->int_scan_req.n_ssids = 1; | |
1015 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1016 | if (!hw->wiphy->bands[band]) | |
1017 | continue; | |
1018 | for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) { | |
1019 | local->int_scan_req.channels[i] = | |
1020 | &hw->wiphy->bands[band]->channels[j]; | |
1021 | i++; | |
1022 | } | |
1023 | } | |
1024 | ||
10f644a4 JB |
1025 | local->network_latency_notifier.notifier_call = |
1026 | ieee80211_max_network_latency; | |
1027 | result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, | |
1028 | &local->network_latency_notifier); | |
1029 | ||
1030 | if (result) { | |
1031 | rtnl_lock(); | |
1032 | goto fail_pm_qos; | |
1033 | } | |
1034 | ||
f0706e82 JB |
1035 | return 0; |
1036 | ||
10f644a4 JB |
1037 | fail_pm_qos: |
1038 | ieee80211_led_exit(local); | |
1039 | ieee80211_remove_interfaces(local); | |
10f644a4 | 1040 | fail_rate: |
f0706e82 | 1041 | unregister_netdevice(local->mdev); |
339a7c41 | 1042 | local->mdev = NULL; |
10f644a4 | 1043 | fail_dev: |
f0706e82 | 1044 | rtnl_unlock(); |
d4c4a9a1 | 1045 | ieee80211_wep_free(local); |
aba74530 | 1046 | fail_wep: |
f0706e82 | 1047 | sta_info_stop(local); |
10f644a4 | 1048 | fail_sta_info: |
e9f207f0 | 1049 | debugfs_hw_del(local); |
f0706e82 | 1050 | destroy_workqueue(local->hw.workqueue); |
10f644a4 | 1051 | fail_workqueue: |
3e122be0 JB |
1052 | if (local->mdev) |
1053 | free_netdev(local->mdev); | |
10f644a4 | 1054 | fail_mdev_alloc: |
f0706e82 | 1055 | wiphy_unregister(local->hw.wiphy); |
10f644a4 | 1056 | fail_wiphy_register: |
2a519311 | 1057 | kfree(local->int_scan_req.channels); |
f0706e82 JB |
1058 | return result; |
1059 | } | |
1060 | EXPORT_SYMBOL(ieee80211_register_hw); | |
1061 | ||
f0706e82 JB |
1062 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
1063 | { | |
1064 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 JB |
1065 | |
1066 | tasklet_kill(&local->tx_pending_tasklet); | |
1067 | tasklet_kill(&local->tasklet); | |
1068 | ||
10f644a4 JB |
1069 | pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, |
1070 | &local->network_latency_notifier); | |
1071 | ||
f0706e82 JB |
1072 | rtnl_lock(); |
1073 | ||
79010420 JB |
1074 | /* |
1075 | * At this point, interface list manipulations are fine | |
1076 | * because the driver cannot be handing us frames any | |
1077 | * more and the tasklet is killed. | |
1078 | */ | |
5b2812e9 | 1079 | |
75636525 JB |
1080 | /* First, we remove all virtual interfaces. */ |
1081 | ieee80211_remove_interfaces(local); | |
5b2812e9 JB |
1082 | |
1083 | /* then, finally, remove the master interface */ | |
3e122be0 | 1084 | unregister_netdevice(local->mdev); |
f0706e82 JB |
1085 | |
1086 | rtnl_unlock(); | |
1087 | ||
f0706e82 JB |
1088 | ieee80211_clear_tx_pending(local); |
1089 | sta_info_stop(local); | |
1090 | rate_control_deinitialize(local); | |
e9f207f0 | 1091 | debugfs_hw_del(local); |
f0706e82 | 1092 | |
f0706e82 JB |
1093 | if (skb_queue_len(&local->skb_queue) |
1094 | || skb_queue_len(&local->skb_queue_unreliable)) | |
1095 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 1096 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1097 | skb_queue_purge(&local->skb_queue); |
1098 | skb_queue_purge(&local->skb_queue_unreliable); | |
1099 | ||
1100 | destroy_workqueue(local->hw.workqueue); | |
1101 | wiphy_unregister(local->hw.wiphy); | |
1102 | ieee80211_wep_free(local); | |
1103 | ieee80211_led_exit(local); | |
3e122be0 | 1104 | free_netdev(local->mdev); |
2a519311 | 1105 | kfree(local->int_scan_req.channels); |
f0706e82 JB |
1106 | } |
1107 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1108 | ||
1109 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1110 | { | |
1111 | struct ieee80211_local *local = hw_to_local(hw); | |
1112 | ||
c771c9d8 | 1113 | mutex_destroy(&local->iflist_mtx); |
f3b85252 | 1114 | mutex_destroy(&local->scan_mtx); |
c771c9d8 | 1115 | |
f0706e82 JB |
1116 | wiphy_free(local->hw.wiphy); |
1117 | } | |
1118 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1119 | ||
f0706e82 JB |
1120 | static int __init ieee80211_init(void) |
1121 | { | |
1122 | struct sk_buff *skb; | |
1123 | int ret; | |
1124 | ||
e039fa4a JB |
1125 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1126 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
c6a1fa12 | 1127 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); |
f0706e82 | 1128 | |
cccf129f FF |
1129 | ret = rc80211_minstrel_init(); |
1130 | if (ret) | |
1131 | return ret; | |
1132 | ||
4b475898 | 1133 | ret = rc80211_pid_init(); |
ad018375 | 1134 | if (ret) |
51cb6db0 | 1135 | return ret; |
f0706e82 | 1136 | |
e9f207f0 JB |
1137 | ieee80211_debugfs_netdev_init(); |
1138 | ||
f0706e82 JB |
1139 | return 0; |
1140 | } | |
1141 | ||
f0706e82 JB |
1142 | static void __exit ieee80211_exit(void) |
1143 | { | |
4b475898 | 1144 | rc80211_pid_exit(); |
cccf129f | 1145 | rc80211_minstrel_exit(); |
ac71c691 | 1146 | |
3b96766f JB |
1147 | /* |
1148 | * For key todo, it'll be empty by now but the work | |
1149 | * might still be scheduled. | |
1150 | */ | |
1151 | flush_scheduled_work(); | |
1152 | ||
f7a92144 LCC |
1153 | if (mesh_allocated) |
1154 | ieee80211s_stop(); | |
902acc78 | 1155 | |
e9f207f0 | 1156 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1157 | } |
1158 | ||
1159 | ||
ca9938fe | 1160 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1161 | module_exit(ieee80211_exit); |
1162 | ||
1163 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1164 | MODULE_LICENSE("GPL"); |