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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" |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 | 30 | #include "rate.h" |
f7a92144 | 31 | #include "mesh.h" |
f0706e82 | 32 | #include "wep.h" |
f0706e82 JB |
33 | #include "wme.h" |
34 | #include "aes_ccm.h" | |
2c8dccc7 | 35 | #include "led.h" |
e0eb6859 | 36 | #include "cfg.h" |
e9f207f0 JB |
37 | #include "debugfs.h" |
38 | #include "debugfs_netdev.h" | |
f0706e82 | 39 | |
b306f453 JB |
40 | /* |
41 | * For seeing transmitted packets on monitor interfaces | |
42 | * we have a radiotap header too. | |
43 | */ | |
44 | struct ieee80211_tx_status_rtap_hdr { | |
45 | struct ieee80211_radiotap_header hdr; | |
e6a9854b JB |
46 | u8 rate; |
47 | u8 padding_for_rate; | |
b306f453 JB |
48 | __le16 tx_flags; |
49 | u8 data_retries; | |
50 | } __attribute__ ((packed)); | |
51 | ||
f0706e82 | 52 | |
4150c572 | 53 | /* must be called under mdev tx lock */ |
0d143fe1 | 54 | void ieee80211_configure_filter(struct ieee80211_local *local) |
4150c572 JB |
55 | { |
56 | unsigned int changed_flags; | |
57 | unsigned int new_flags = 0; | |
58 | ||
53918994 | 59 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
60 | new_flags |= FIF_PROMISC_IN_BSS; |
61 | ||
53918994 | 62 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
63 | new_flags |= FIF_ALLMULTI; |
64 | ||
65 | if (local->monitors) | |
8cc9a739 MW |
66 | new_flags |= FIF_BCN_PRBRESP_PROMISC; |
67 | ||
68 | if (local->fif_fcsfail) | |
69 | new_flags |= FIF_FCSFAIL; | |
70 | ||
71 | if (local->fif_plcpfail) | |
72 | new_flags |= FIF_PLCPFAIL; | |
73 | ||
74 | if (local->fif_control) | |
75 | new_flags |= FIF_CONTROL; | |
76 | ||
77 | if (local->fif_other_bss) | |
78 | new_flags |= FIF_OTHER_BSS; | |
4150c572 JB |
79 | |
80 | changed_flags = local->filter_flags ^ new_flags; | |
81 | ||
82 | /* be a bit nasty */ | |
83 | new_flags |= (1<<31); | |
84 | ||
24487981 JB |
85 | drv_configure_filter(local, changed_flags, &new_flags, |
86 | local->mdev->mc_count, | |
87 | local->mdev->mc_list); | |
4150c572 JB |
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 | { |
58905ca5 | 157 | struct ieee80211_channel *chan, *scan_chan; |
b2c258fb | 158 | int ret = 0; |
e8975581 | 159 | int power; |
094d05dc | 160 | enum nl80211_channel_type channel_type; |
f0706e82 | 161 | |
cb121bad JB |
162 | might_sleep(); |
163 | ||
58905ca5 JB |
164 | scan_chan = local->scan_channel; |
165 | ||
166 | if (scan_chan) { | |
167 | chan = scan_chan; | |
094d05dc | 168 | channel_type = NL80211_CHAN_NO_HT; |
72bdcf34 | 169 | } else { |
b2c258fb | 170 | chan = local->oper_channel; |
094d05dc | 171 | channel_type = local->oper_channel_type; |
72bdcf34 | 172 | } |
f0706e82 | 173 | |
72bdcf34 | 174 | if (chan != local->hw.conf.channel || |
4797938c | 175 | channel_type != local->hw.conf.channel_type) { |
e8975581 | 176 | local->hw.conf.channel = chan; |
4797938c | 177 | local->hw.conf.channel_type = channel_type; |
e8975581 JB |
178 | changed |= IEEE80211_CONF_CHANGE_CHANNEL; |
179 | } | |
8318d78a | 180 | |
58905ca5 | 181 | if (scan_chan) |
e8975581 | 182 | power = chan->max_power; |
8318d78a | 183 | else |
a8302de9 VT |
184 | power = local->power_constr_level ? |
185 | (chan->max_power - local->power_constr_level) : | |
186 | chan->max_power; | |
187 | ||
47afbaf5 | 188 | if (local->user_power_level >= 0) |
a8302de9 VT |
189 | power = min(power, local->user_power_level); |
190 | ||
e8975581 JB |
191 | if (local->hw.conf.power_level != power) { |
192 | changed |= IEEE80211_CONF_CHANGE_POWER; | |
193 | local->hw.conf.power_level = power; | |
194 | } | |
b2c258fb | 195 | |
e8975581 | 196 | if (changed && local->open_count) { |
24487981 | 197 | ret = drv_config(local, changed); |
d73782fd | 198 | /* |
447107fb | 199 | * Goal: |
d73782fd JB |
200 | * HW reconfiguration should never fail, the driver has told |
201 | * us what it can support so it should live up to that promise. | |
447107fb RC |
202 | * |
203 | * Current status: | |
204 | * rfkill is not integrated with mac80211 and a | |
205 | * configuration command can thus fail if hardware rfkill | |
206 | * is enabled | |
207 | * | |
208 | * FIXME: integrate rfkill with mac80211 and then add this | |
209 | * WARN_ON() back | |
210 | * | |
d73782fd | 211 | */ |
447107fb | 212 | /* WARN_ON(ret); */ |
d73782fd | 213 | } |
f0706e82 | 214 | |
b2c258fb JB |
215 | return ret; |
216 | } | |
f0706e82 | 217 | |
471b3efd JB |
218 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
219 | u32 changed) | |
d9430a32 | 220 | { |
471b3efd JB |
221 | struct ieee80211_local *local = sdata->local; |
222 | ||
223 | if (!changed) | |
224 | return; | |
225 | ||
2d0ddec5 JB |
226 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
227 | sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; | |
228 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
229 | sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; | |
230 | else if (sdata->vif.type == NL80211_IFTYPE_AP) | |
231 | sdata->vif.bss_conf.bssid = sdata->dev->dev_addr; | |
232 | else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
233 | static const u8 zero[ETH_ALEN] = { 0 }; | |
234 | sdata->vif.bss_conf.bssid = zero; | |
235 | } else { | |
236 | WARN_ON(1); | |
237 | return; | |
238 | } | |
239 | ||
240 | switch (sdata->vif.type) { | |
241 | case NL80211_IFTYPE_AP: | |
242 | case NL80211_IFTYPE_ADHOC: | |
243 | case NL80211_IFTYPE_MESH_POINT: | |
244 | break; | |
245 | default: | |
246 | /* do not warn to simplify caller in scan.c */ | |
247 | changed &= ~BSS_CHANGED_BEACON_ENABLED; | |
248 | if (WARN_ON(changed & BSS_CHANGED_BEACON)) | |
249 | return; | |
250 | break; | |
251 | } | |
252 | ||
253 | if (changed & BSS_CHANGED_BEACON_ENABLED) { | |
254 | if (local->sw_scanning) { | |
255 | sdata->vif.bss_conf.enable_beacon = false; | |
256 | } else { | |
257 | /* | |
258 | * Beacon should be enabled, but AP mode must | |
259 | * check whether there is a beacon configured. | |
260 | */ | |
261 | switch (sdata->vif.type) { | |
262 | case NL80211_IFTYPE_AP: | |
263 | sdata->vif.bss_conf.enable_beacon = | |
264 | !!rcu_dereference(sdata->u.ap.beacon); | |
265 | break; | |
266 | case NL80211_IFTYPE_ADHOC: | |
267 | sdata->vif.bss_conf.enable_beacon = | |
268 | !!rcu_dereference(sdata->u.ibss.presp); | |
269 | break; | |
270 | case NL80211_IFTYPE_MESH_POINT: | |
271 | sdata->vif.bss_conf.enable_beacon = true; | |
272 | break; | |
273 | default: | |
274 | /* not reached */ | |
275 | WARN_ON(1); | |
276 | break; | |
277 | } | |
278 | } | |
279 | } | |
280 | ||
24487981 JB |
281 | drv_bss_info_changed(local, &sdata->vif, |
282 | &sdata->vif.bss_conf, changed); | |
57c4d7b4 JB |
283 | |
284 | /* | |
285 | * DEPRECATED | |
286 | * | |
287 | * ~changed is just there to not do this at resume time | |
288 | */ | |
289 | if (changed & BSS_CHANGED_BEACON_INT && ~changed) { | |
290 | local->hw.conf.beacon_int = sdata->vif.bss_conf.beacon_int; | |
291 | ieee80211_hw_config(local, | |
292 | _IEEE80211_CONF_CHANGE_BEACON_INTERVAL); | |
293 | } | |
d9430a32 DD |
294 | } |
295 | ||
f698d856 | 296 | u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
d9430a32 | 297 | { |
bda3933a JB |
298 | sdata->vif.bss_conf.use_cts_prot = false; |
299 | sdata->vif.bss_conf.use_short_preamble = false; | |
300 | sdata->vif.bss_conf.use_short_slot = false; | |
7a5158ef JB |
301 | return BSS_CHANGED_ERP_CTS_PROT | |
302 | BSS_CHANGED_ERP_PREAMBLE | | |
303 | BSS_CHANGED_ERP_SLOT; | |
d9430a32 DD |
304 | } |
305 | ||
f0706e82 | 306 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 307 | struct sk_buff *skb) |
f0706e82 JB |
308 | { |
309 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 310 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
311 | int tmp; |
312 | ||
313 | skb->dev = local->mdev; | |
f0706e82 | 314 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 315 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
316 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
317 | tmp = skb_queue_len(&local->skb_queue) + | |
318 | skb_queue_len(&local->skb_queue_unreliable); | |
319 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
320 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
321 | dev_kfree_skb_irq(skb); |
322 | tmp--; | |
323 | I802_DEBUG_INC(local->tx_status_drop); | |
324 | } | |
325 | tasklet_schedule(&local->tasklet); | |
326 | } | |
327 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
328 | ||
329 | static void ieee80211_tasklet_handler(unsigned long data) | |
330 | { | |
331 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
332 | struct sk_buff *skb; | |
333 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 334 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
335 | |
336 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
337 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
338 | switch (skb->pkt_type) { | |
339 | case IEEE80211_RX_MSG: | |
340 | /* status is in skb->cb */ | |
341 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 342 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
343 | * netstack. */ |
344 | skb->pkt_type = 0; | |
345 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
346 | break; | |
347 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 348 | skb->pkt_type = 0; |
e039fa4a | 349 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 350 | break; |
eadc8d9e RR |
351 | case IEEE80211_DELBA_MSG: |
352 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
353 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
354 | ra_tid->ra, ra_tid->tid); | |
355 | dev_kfree_skb(skb); | |
356 | break; | |
357 | case IEEE80211_ADDBA_MSG: | |
358 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
359 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
360 | ra_tid->ra, ra_tid->tid); | |
361 | dev_kfree_skb(skb); | |
362 | break ; | |
f4ea83dd | 363 | default: |
5e3f3089 LF |
364 | WARN(1, "mac80211: Packet is of unknown type %d\n", |
365 | skb->pkt_type); | |
f0706e82 JB |
366 | dev_kfree_skb(skb); |
367 | break; | |
368 | } | |
369 | } | |
370 | } | |
371 | ||
f0706e82 JB |
372 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
373 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
374 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
d0f09804 | 375 | */ |
f0706e82 JB |
376 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, |
377 | struct ieee80211_key *key, | |
e039fa4a | 378 | struct sk_buff *skb) |
f0706e82 | 379 | { |
62bf1d76 HH |
380 | unsigned int hdrlen, iv_len, mic_len; |
381 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
f0706e82 | 382 | |
62bf1d76 | 383 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
f0706e82 JB |
384 | |
385 | if (!key) | |
386 | goto no_key; | |
387 | ||
8f20fc24 | 388 | switch (key->conf.alg) { |
f0706e82 JB |
389 | case ALG_WEP: |
390 | iv_len = WEP_IV_LEN; | |
391 | mic_len = WEP_ICV_LEN; | |
392 | break; | |
393 | case ALG_TKIP: | |
394 | iv_len = TKIP_IV_LEN; | |
395 | mic_len = TKIP_ICV_LEN; | |
396 | break; | |
397 | case ALG_CCMP: | |
398 | iv_len = CCMP_HDR_LEN; | |
399 | mic_len = CCMP_MIC_LEN; | |
400 | break; | |
401 | default: | |
402 | goto no_key; | |
403 | } | |
404 | ||
62bf1d76 | 405 | if (skb->len >= hdrlen + mic_len && |
11a843b7 | 406 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 | 407 | skb_trim(skb, skb->len - mic_len); |
62bf1d76 | 408 | if (skb->len >= hdrlen + iv_len) { |
f0706e82 | 409 | memmove(skb->data + iv_len, skb->data, hdrlen); |
62bf1d76 | 410 | hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len); |
f0706e82 JB |
411 | } |
412 | ||
413 | no_key: | |
62bf1d76 HH |
414 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
415 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
416 | memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, | |
417 | hdrlen - IEEE80211_QOS_CTL_LEN); | |
418 | skb_pull(skb, IEEE80211_QOS_CTL_LEN); | |
f0706e82 JB |
419 | } |
420 | } | |
421 | ||
d46e144b JB |
422 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
423 | struct sta_info *sta, | |
e039fa4a | 424 | struct sk_buff *skb) |
d46e144b JB |
425 | { |
426 | sta->tx_filtered_count++; | |
427 | ||
428 | /* | |
429 | * Clear the TX filter mask for this STA when sending the next | |
430 | * packet. If the STA went to power save mode, this will happen | |
f6d97104 | 431 | * when it wakes up for the next time. |
d46e144b | 432 | */ |
07346f81 | 433 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
434 | |
435 | /* | |
436 | * This code races in the following way: | |
437 | * | |
438 | * (1) STA sends frame indicating it will go to sleep and does so | |
439 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
440 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
441 | * (4) we get TX status before having processed the frame and | |
442 | * knowing that the STA has gone to sleep. | |
443 | * | |
444 | * This is actually quite unlikely even when both those events are | |
445 | * processed from interrupts coming in quickly after one another or | |
446 | * even at the same time because we queue both TX status events and | |
447 | * RX frames to be processed by a tasklet and process them in the | |
448 | * same order that they were received or TX status last. Hence, there | |
449 | * is no race as long as the frame RX is processed before the next TX | |
450 | * status, which drivers can ensure, see below. | |
451 | * | |
452 | * Note that this can only happen if the hardware or firmware can | |
453 | * actually add STAs to the filter list, if this is done by the | |
454 | * driver in response to set_tim() (which will only reduce the race | |
455 | * this whole filtering tries to solve, not completely solve it) | |
456 | * this situation cannot happen. | |
457 | * | |
458 | * To completely solve this race drivers need to make sure that they | |
459 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
460 | * functions and | |
461 | * (b) always process RX events before TX status events if ordering | |
462 | * can be unknown, for example with different interrupt status | |
463 | * bits. | |
464 | */ | |
07346f81 | 465 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 466 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 467 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
468 | skb_queue_tail(&sta->tx_filtered, skb); |
469 | return; | |
470 | } | |
471 | ||
8b30b1fe | 472 | if (!test_sta_flags(sta, WLAN_STA_PS) && !skb->requeue) { |
d46e144b | 473 | /* Software retry the packet once */ |
8b30b1fe | 474 | skb->requeue = 1; |
e039fa4a | 475 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
476 | dev_queue_xmit(skb); |
477 | return; | |
478 | } | |
479 | ||
f4ea83dd | 480 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
d46e144b JB |
481 | if (net_ratelimit()) |
482 | printk(KERN_DEBUG "%s: dropped TX filtered frame, " | |
483 | "queue_len=%d PS=%d @%lu\n", | |
484 | wiphy_name(local->hw.wiphy), | |
485 | skb_queue_len(&sta->tx_filtered), | |
07346f81 | 486 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
f4ea83dd | 487 | #endif |
d46e144b JB |
488 | dev_kfree_skb(skb); |
489 | } | |
490 | ||
e039fa4a | 491 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
492 | { |
493 | struct sk_buff *skb2; | |
494 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
495 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 496 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 497 | u16 frag, type; |
429a3805 | 498 | __le16 fc; |
4b7679a5 | 499 | struct ieee80211_supported_band *sband; |
b306f453 JB |
500 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
501 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 502 | struct net_device *prev_dev = NULL; |
429a3805 | 503 | struct sta_info *sta; |
e6a9854b JB |
504 | int retry_count = -1, i; |
505 | ||
506 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
507 | /* the HW cannot have attempted that rate */ | |
508 | if (i >= hw->max_rates) { | |
509 | info->status.rates[i].idx = -1; | |
510 | info->status.rates[i].count = 0; | |
511 | } | |
512 | ||
513 | retry_count += info->status.rates[i].count; | |
514 | } | |
515 | if (retry_count < 0) | |
516 | retry_count = 0; | |
f0706e82 | 517 | |
d0709a65 JB |
518 | rcu_read_lock(); |
519 | ||
e6a9854b JB |
520 | sband = local->hw.wiphy->bands[info->band]; |
521 | ||
95dac040 JB |
522 | sta = sta_info_get(local, hdr->addr1); |
523 | ||
524 | if (sta) { | |
e6a9854b | 525 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
95dac040 JB |
526 | test_sta_flags(sta, WLAN_STA_PS)) { |
527 | /* | |
528 | * The STA is in power save mode, so assume | |
529 | * that this TX packet failed because of that. | |
530 | */ | |
531 | ieee80211_handle_filtered_frame(local, sta, skb); | |
532 | rcu_read_unlock(); | |
533 | return; | |
f0706e82 | 534 | } |
f0706e82 | 535 | |
95dac040 JB |
536 | fc = hdr->frame_control; |
537 | ||
538 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && | |
539 | (ieee80211_is_data_qos(fc))) { | |
540 | u16 tid, ssn; | |
541 | u8 *qc; | |
429a3805 | 542 | |
429a3805 RR |
543 | qc = ieee80211_get_qos_ctl(hdr); |
544 | tid = qc[0] & 0xf; | |
545 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
546 | & IEEE80211_SCTL_SEQ); | |
f698d856 | 547 | ieee80211_send_bar(sta->sdata, hdr->addr1, |
429a3805 RR |
548 | tid, ssn); |
549 | } | |
429a3805 | 550 | |
95dac040 | 551 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
e039fa4a | 552 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 553 | rcu_read_unlock(); |
f0706e82 | 554 | return; |
95dac040 | 555 | } else { |
e6a9854b | 556 | if (!(info->flags & IEEE80211_TX_STAT_ACK)) |
95dac040 | 557 | sta->tx_retry_failed++; |
e6a9854b | 558 | sta->tx_retry_count += retry_count; |
f0706e82 | 559 | } |
95dac040 | 560 | |
4b7679a5 | 561 | rate_control_tx_status(local, sband, sta, skb); |
95dac040 | 562 | } |
f0706e82 | 563 | |
d0709a65 JB |
564 | rcu_read_unlock(); |
565 | ||
f0706e82 JB |
566 | ieee80211_led_tx(local, 0); |
567 | ||
568 | /* SNMP counters | |
569 | * Fragments are passed to low-level drivers as separate skbs, so these | |
570 | * are actually fragments, not frames. Update frame counters only for | |
571 | * the first fragment of the frame. */ | |
572 | ||
573 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
574 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
575 | ||
e039fa4a | 576 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
577 | if (frag == 0) { |
578 | local->dot11TransmittedFrameCount++; | |
579 | if (is_multicast_ether_addr(hdr->addr1)) | |
580 | local->dot11MulticastTransmittedFrameCount++; | |
e6a9854b | 581 | if (retry_count > 0) |
f0706e82 | 582 | local->dot11RetryCount++; |
e6a9854b | 583 | if (retry_count > 1) |
f0706e82 JB |
584 | local->dot11MultipleRetryCount++; |
585 | } | |
586 | ||
587 | /* This counter shall be incremented for an acknowledged MPDU | |
588 | * with an individual address in the address 1 field or an MPDU | |
589 | * with a multicast address in the address 1 field of type Data | |
590 | * or Management. */ | |
591 | if (!is_multicast_ether_addr(hdr->addr1) || | |
592 | type == IEEE80211_FTYPE_DATA || | |
593 | type == IEEE80211_FTYPE_MGMT) | |
594 | local->dot11TransmittedFragmentCount++; | |
595 | } else { | |
596 | if (frag == 0) | |
597 | local->dot11FailedCount++; | |
598 | } | |
599 | ||
b306f453 JB |
600 | /* this was a transmitted frame, but now we want to reuse it */ |
601 | skb_orphan(skb); | |
602 | ||
3d30d949 MW |
603 | /* |
604 | * This is a bit racy but we can avoid a lot of work | |
605 | * with this test... | |
606 | */ | |
607 | if (!local->monitors && !local->cooked_mntrs) { | |
f0706e82 JB |
608 | dev_kfree_skb(skb); |
609 | return; | |
610 | } | |
611 | ||
b306f453 | 612 | /* send frame to monitor interfaces now */ |
f0706e82 | 613 | |
b306f453 JB |
614 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
615 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
616 | dev_kfree_skb(skb); |
617 | return; | |
618 | } | |
f0706e82 | 619 | |
988c0f72 | 620 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
621 | skb_push(skb, sizeof(*rthdr)); |
622 | ||
623 | memset(rthdr, 0, sizeof(*rthdr)); | |
624 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
625 | rthdr->hdr.it_present = | |
626 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
e6a9854b JB |
627 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES) | |
628 | (1 << IEEE80211_RADIOTAP_RATE)); | |
b306f453 | 629 | |
e039fa4a | 630 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
631 | !is_multicast_ether_addr(hdr->addr1)) |
632 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
633 | ||
e6a9854b JB |
634 | /* |
635 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
636 | * extensions proposal contains, we can actually report | |
637 | * the whole set of tries we did. | |
638 | */ | |
639 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || | |
640 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) | |
b306f453 | 641 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e6a9854b | 642 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b306f453 | 643 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
e6a9854b JB |
644 | if (info->status.rates[0].idx >= 0 && |
645 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) | |
646 | rthdr->rate = sband->bitrates[ | |
647 | info->status.rates[0].idx].bitrate / 5; | |
b306f453 | 648 | |
e6a9854b JB |
649 | /* for now report the total retry_count */ |
650 | rthdr->data_retries = retry_count; | |
b306f453 | 651 | |
3d30d949 MW |
652 | /* XXX: is this sufficient for BPF? */ |
653 | skb_set_mac_header(skb, 0); | |
654 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
655 | skb->pkt_type = PACKET_OTHERHOST; | |
656 | skb->protocol = htons(ETH_P_802_2); | |
657 | memset(skb->cb, 0, sizeof(skb->cb)); | |
658 | ||
79010420 | 659 | rcu_read_lock(); |
79010420 | 660 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
05c914fe | 661 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
b306f453 JB |
662 | if (!netif_running(sdata->dev)) |
663 | continue; | |
3d30d949 MW |
664 | |
665 | if (prev_dev) { | |
79010420 | 666 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
667 | if (skb2) { |
668 | skb2->dev = prev_dev; | |
669 | netif_rx(skb2); | |
670 | } | |
671 | } | |
672 | ||
673 | prev_dev = sdata->dev; | |
b306f453 JB |
674 | } |
675 | } | |
3d30d949 MW |
676 | if (prev_dev) { |
677 | skb->dev = prev_dev; | |
678 | netif_rx(skb); | |
679 | skb = NULL; | |
680 | } | |
79010420 | 681 | rcu_read_unlock(); |
3d30d949 | 682 | dev_kfree_skb(skb); |
f0706e82 JB |
683 | } |
684 | EXPORT_SYMBOL(ieee80211_tx_status); | |
685 | ||
f2753ddb JB |
686 | static void ieee80211_restart_work(struct work_struct *work) |
687 | { | |
688 | struct ieee80211_local *local = | |
689 | container_of(work, struct ieee80211_local, restart_work); | |
690 | ||
691 | rtnl_lock(); | |
692 | ieee80211_reconfig(local); | |
693 | rtnl_unlock(); | |
694 | } | |
695 | ||
696 | void ieee80211_restart_hw(struct ieee80211_hw *hw) | |
697 | { | |
698 | struct ieee80211_local *local = hw_to_local(hw); | |
699 | ||
700 | /* use this reason, __ieee80211_resume will unblock it */ | |
701 | ieee80211_stop_queues_by_reason(hw, | |
702 | IEEE80211_QUEUE_STOP_REASON_SUSPEND); | |
703 | ||
704 | schedule_work(&local->restart_work); | |
705 | } | |
706 | EXPORT_SYMBOL(ieee80211_restart_hw); | |
707 | ||
f0706e82 JB |
708 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
709 | const struct ieee80211_ops *ops) | |
710 | { | |
f0706e82 | 711 | struct ieee80211_local *local; |
96f5e66e | 712 | int priv_size, i; |
f0706e82 JB |
713 | struct wiphy *wiphy; |
714 | ||
715 | /* Ensure 32-byte alignment of our private data and hw private data. | |
716 | * We use the wiphy priv data for both our ieee80211_local and for | |
717 | * the driver's private data | |
718 | * | |
719 | * In memory it'll be like this: | |
720 | * | |
721 | * +-------------------------+ | |
722 | * | struct wiphy | | |
723 | * +-------------------------+ | |
724 | * | struct ieee80211_local | | |
725 | * +-------------------------+ | |
726 | * | driver's private data | | |
727 | * +-------------------------+ | |
728 | * | |
729 | */ | |
730 | priv_size = ((sizeof(struct ieee80211_local) + | |
731 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
732 | priv_data_len; | |
733 | ||
734 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
735 | ||
736 | if (!wiphy) | |
737 | return NULL; | |
738 | ||
739 | wiphy->privid = mac80211_wiphy_privid; | |
18a83659 | 740 | |
00d3f14c JB |
741 | /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */ |
742 | wiphy->bss_priv_size = sizeof(struct ieee80211_bss) - | |
743 | sizeof(struct cfg80211_bss); | |
f0706e82 JB |
744 | |
745 | local = wiphy_priv(wiphy); | |
de95a54b | 746 | |
f0706e82 JB |
747 | local->hw.wiphy = wiphy; |
748 | ||
749 | local->hw.priv = (char *)local + | |
750 | ((sizeof(struct ieee80211_local) + | |
751 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
752 | ||
4480f15c | 753 | BUG_ON(!ops->tx); |
4150c572 JB |
754 | BUG_ON(!ops->start); |
755 | BUG_ON(!ops->stop); | |
4480f15c JB |
756 | BUG_ON(!ops->config); |
757 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
758 | BUG_ON(!ops->remove_interface); |
759 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
760 | local->ops = ops; |
761 | ||
e6a9854b JB |
762 | /* set up some defaults */ |
763 | local->hw.queues = 1; | |
764 | local->hw.max_rates = 1; | |
b9a5f8ca JM |
765 | local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; |
766 | local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; | |
e8975581 | 767 | local->hw.conf.radio_enabled = true; |
c428c892 | 768 | local->user_power_level = -1; |
f0706e82 | 769 | |
79010420 | 770 | INIT_LIST_HEAD(&local->interfaces); |
c771c9d8 | 771 | mutex_init(&local->iflist_mtx); |
f3b85252 | 772 | mutex_init(&local->scan_mtx); |
f0706e82 | 773 | |
b16bd15c JB |
774 | spin_lock_init(&local->key_lock); |
775 | ||
ce7c9111 KV |
776 | spin_lock_init(&local->queue_stop_reason_lock); |
777 | ||
c2b13452 | 778 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
f0706e82 | 779 | |
f2753ddb JB |
780 | INIT_WORK(&local->restart_work, ieee80211_restart_work); |
781 | ||
520eb820 KV |
782 | INIT_WORK(&local->dynamic_ps_enable_work, |
783 | ieee80211_dynamic_ps_enable_work); | |
784 | INIT_WORK(&local->dynamic_ps_disable_work, | |
785 | ieee80211_dynamic_ps_disable_work); | |
786 | setup_timer(&local->dynamic_ps_timer, | |
787 | ieee80211_dynamic_ps_timer, (unsigned long) local); | |
788 | ||
f0706e82 JB |
789 | sta_info_init(local); |
790 | ||
2a577d98 JB |
791 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) |
792 | skb_queue_head_init(&local->pending[i]); | |
f0706e82 JB |
793 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
794 | (unsigned long)local); | |
795 | tasklet_disable(&local->tx_pending_tasklet); | |
796 | ||
797 | tasklet_init(&local->tasklet, | |
798 | ieee80211_tasklet_handler, | |
799 | (unsigned long) local); | |
800 | tasklet_disable(&local->tasklet); | |
801 | ||
802 | skb_queue_head_init(&local->skb_queue); | |
803 | skb_queue_head_init(&local->skb_queue_unreliable); | |
804 | ||
cd8ffc80 JB |
805 | spin_lock_init(&local->ampdu_lock); |
806 | ||
f0706e82 JB |
807 | return local_to_hw(local); |
808 | } | |
809 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
810 | ||
7230645e JB |
811 | static const struct net_device_ops ieee80211_master_ops = { |
812 | .ndo_start_xmit = ieee80211_master_start_xmit, | |
813 | .ndo_open = ieee80211_master_open, | |
814 | .ndo_stop = ieee80211_master_stop, | |
815 | .ndo_set_multicast_list = ieee80211_master_set_multicast_list, | |
816 | .ndo_select_queue = ieee80211_select_queue, | |
817 | }; | |
818 | ||
819 | static void ieee80211_master_setup(struct net_device *mdev) | |
820 | { | |
821 | mdev->type = ARPHRD_IEEE80211; | |
822 | mdev->netdev_ops = &ieee80211_master_ops; | |
823 | mdev->header_ops = &ieee80211_header_ops; | |
824 | mdev->tx_queue_len = 1000; | |
825 | mdev->addr_len = ETH_ALEN; | |
826 | } | |
827 | ||
f0706e82 JB |
828 | int ieee80211_register_hw(struct ieee80211_hw *hw) |
829 | { | |
830 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 | 831 | int result; |
8318d78a | 832 | enum ieee80211_band band; |
96d51056 | 833 | struct net_device *mdev; |
133b8226 | 834 | struct ieee80211_master_priv *mpriv; |
de95a54b | 835 | int channels, i, j, max_bitrates; |
5ef2d41a | 836 | bool supp_ht; |
25e47c18 JB |
837 | static const u32 cipher_suites[] = { |
838 | WLAN_CIPHER_SUITE_WEP40, | |
839 | WLAN_CIPHER_SUITE_WEP104, | |
840 | WLAN_CIPHER_SUITE_TKIP, | |
841 | WLAN_CIPHER_SUITE_CCMP, | |
842 | ||
843 | /* keep last -- depends on hw flags! */ | |
844 | WLAN_CIPHER_SUITE_AES_CMAC | |
845 | }; | |
8318d78a JB |
846 | |
847 | /* | |
848 | * generic code guarantees at least one band, | |
849 | * set this very early because much code assumes | |
850 | * that hw.conf.channel is assigned | |
851 | */ | |
2a519311 | 852 | channels = 0; |
de95a54b | 853 | max_bitrates = 0; |
5ef2d41a | 854 | supp_ht = false; |
8318d78a JB |
855 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
856 | struct ieee80211_supported_band *sband; | |
857 | ||
858 | sband = local->hw.wiphy->bands[band]; | |
de95a54b JB |
859 | if (!sband) |
860 | continue; | |
861 | if (!local->oper_channel) { | |
8318d78a JB |
862 | /* init channel we're on */ |
863 | local->hw.conf.channel = | |
58905ca5 JB |
864 | local->oper_channel = &sband->channels[0]; |
865 | local->hw.conf.channel_type = NL80211_CHAN_NO_HT; | |
8318d78a | 866 | } |
de95a54b JB |
867 | channels += sband->n_channels; |
868 | ||
869 | if (max_bitrates < sband->n_bitrates) | |
870 | max_bitrates = sband->n_bitrates; | |
5ef2d41a | 871 | supp_ht = supp_ht || sband->ht_cap.ht_supported; |
8318d78a | 872 | } |
f0706e82 | 873 | |
2a519311 JB |
874 | local->int_scan_req.n_channels = channels; |
875 | local->int_scan_req.channels = kzalloc(sizeof(void *) * channels, GFP_KERNEL); | |
876 | if (!local->int_scan_req.channels) | |
877 | return -ENOMEM; | |
878 | ||
f59ac048 LR |
879 | /* if low-level driver supports AP, we also support VLAN */ |
880 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) | |
881 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
882 | ||
883 | /* mac80211 always supports monitor */ | |
884 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); | |
885 | ||
77965c97 JB |
886 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
887 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; | |
888 | else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) | |
889 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; | |
890 | ||
de95a54b JB |
891 | /* |
892 | * Calculate scan IE length -- we need this to alloc | |
893 | * memory and to subtract from the driver limit. It | |
894 | * includes the (extended) supported rates and HT | |
895 | * information -- SSID is the driver's responsibility. | |
896 | */ | |
897 | local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ | |
5ef2d41a JB |
898 | if (supp_ht) |
899 | local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); | |
de95a54b JB |
900 | |
901 | if (!local->ops->hw_scan) { | |
902 | /* For hw_scan, driver needs to set these up. */ | |
903 | local->hw.wiphy->max_scan_ssids = 4; | |
904 | local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; | |
905 | } | |
906 | ||
907 | /* | |
908 | * If the driver supports any scan IEs, then assume the | |
909 | * limit includes the IEs mac80211 will add, otherwise | |
910 | * leave it at zero and let the driver sort it out; we | |
911 | * still pass our IEs to the driver but userspace will | |
912 | * not be allowed to in that case. | |
913 | */ | |
914 | if (local->hw.wiphy->max_scan_ie_len) | |
915 | local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; | |
916 | ||
25e47c18 JB |
917 | local->hw.wiphy->cipher_suites = cipher_suites; |
918 | local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); | |
919 | if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) | |
920 | local->hw.wiphy->n_cipher_suites--; | |
921 | ||
f0706e82 JB |
922 | result = wiphy_register(local->hw.wiphy); |
923 | if (result < 0) | |
2a519311 | 924 | goto fail_wiphy_register; |
f0706e82 | 925 | |
e2530083 JB |
926 | /* |
927 | * We use the number of queues for feature tests (QoS, HT) internally | |
928 | * so restrict them appropriately. | |
929 | */ | |
e2530083 JB |
930 | if (hw->queues > IEEE80211_MAX_QUEUES) |
931 | hw->queues = IEEE80211_MAX_QUEUES; | |
e2530083 | 932 | |
133b8226 | 933 | mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv), |
7230645e | 934 | "wmaster%d", ieee80211_master_setup, |
96f5e66e | 935 | hw->queues); |
96d51056 JB |
936 | if (!mdev) |
937 | goto fail_mdev_alloc; | |
938 | ||
133b8226 JB |
939 | mpriv = netdev_priv(mdev); |
940 | mpriv->local = local; | |
96d51056 JB |
941 | local->mdev = mdev; |
942 | ||
4ada424d | 943 | local->hw.workqueue = |
30d3ef41 | 944 | create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
945 | if (!local->hw.workqueue) { |
946 | result = -ENOMEM; | |
947 | goto fail_workqueue; | |
948 | } | |
949 | ||
b306f453 JB |
950 | /* |
951 | * The hardware needs headroom for sending the frame, | |
952 | * and we need some headroom for passing the frame to monitor | |
953 | * interfaces, but never both at the same time. | |
954 | */ | |
33ccad35 JB |
955 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
956 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 957 | |
e9f207f0 JB |
958 | debugfs_hw_add(local); |
959 | ||
ea95bba4 TW |
960 | if (local->hw.max_listen_interval == 0) |
961 | local->hw.max_listen_interval = 1; | |
962 | ||
963 | local->hw.conf.listen_interval = local->hw.max_listen_interval; | |
964 | ||
f0706e82 JB |
965 | result = sta_info_start(local); |
966 | if (result < 0) | |
967 | goto fail_sta_info; | |
968 | ||
d4c4a9a1 AJ |
969 | result = ieee80211_wep_init(local); |
970 | if (result < 0) { | |
971 | printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", | |
972 | wiphy_name(local->hw.wiphy), result); | |
973 | goto fail_wep; | |
974 | } | |
975 | ||
f0706e82 JB |
976 | rtnl_lock(); |
977 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
978 | if (result < 0) | |
979 | goto fail_dev; | |
980 | ||
981 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
982 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
076ae609 | 983 | local->mdev->features |= NETIF_F_NETNS_LOCAL; |
f0706e82 JB |
984 | |
985 | result = register_netdevice(local->mdev); | |
986 | if (result < 0) | |
987 | goto fail_dev; | |
988 | ||
830f9038 JB |
989 | result = ieee80211_init_rate_ctrl_alg(local, |
990 | hw->rate_control_algorithm); | |
f0706e82 JB |
991 | if (result < 0) { |
992 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 993 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
994 | goto fail_rate; |
995 | } | |
996 | ||
8dffff21 JB |
997 | /* add one default STA interface if supported */ |
998 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { | |
999 | result = ieee80211_if_add(local, "wlan%d", NULL, | |
1000 | NL80211_IFTYPE_STATION, NULL); | |
1001 | if (result) | |
1002 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
1003 | wiphy_name(local->hw.wiphy)); | |
1004 | } | |
f0706e82 | 1005 | |
f0706e82 JB |
1006 | rtnl_unlock(); |
1007 | ||
1008 | ieee80211_led_init(local); | |
1009 | ||
2a519311 JB |
1010 | /* alloc internal scan request */ |
1011 | i = 0; | |
1012 | local->int_scan_req.ssids = &local->scan_ssid; | |
1013 | local->int_scan_req.n_ssids = 1; | |
1014 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1015 | if (!hw->wiphy->bands[band]) | |
1016 | continue; | |
1017 | for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) { | |
1018 | local->int_scan_req.channels[i] = | |
1019 | &hw->wiphy->bands[band]->channels[j]; | |
1020 | i++; | |
1021 | } | |
1022 | } | |
1023 | ||
10f644a4 JB |
1024 | local->network_latency_notifier.notifier_call = |
1025 | ieee80211_max_network_latency; | |
1026 | result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, | |
1027 | &local->network_latency_notifier); | |
1028 | ||
1029 | if (result) { | |
1030 | rtnl_lock(); | |
1031 | goto fail_pm_qos; | |
1032 | } | |
1033 | ||
f0706e82 JB |
1034 | return 0; |
1035 | ||
10f644a4 JB |
1036 | fail_pm_qos: |
1037 | ieee80211_led_exit(local); | |
1038 | ieee80211_remove_interfaces(local); | |
10f644a4 | 1039 | fail_rate: |
f0706e82 | 1040 | unregister_netdevice(local->mdev); |
339a7c41 | 1041 | local->mdev = NULL; |
10f644a4 | 1042 | fail_dev: |
f0706e82 | 1043 | rtnl_unlock(); |
d4c4a9a1 | 1044 | ieee80211_wep_free(local); |
aba74530 | 1045 | fail_wep: |
f0706e82 | 1046 | sta_info_stop(local); |
10f644a4 | 1047 | fail_sta_info: |
e9f207f0 | 1048 | debugfs_hw_del(local); |
f0706e82 | 1049 | destroy_workqueue(local->hw.workqueue); |
10f644a4 | 1050 | fail_workqueue: |
3e122be0 JB |
1051 | if (local->mdev) |
1052 | free_netdev(local->mdev); | |
10f644a4 | 1053 | fail_mdev_alloc: |
f0706e82 | 1054 | wiphy_unregister(local->hw.wiphy); |
10f644a4 | 1055 | fail_wiphy_register: |
2a519311 | 1056 | kfree(local->int_scan_req.channels); |
f0706e82 JB |
1057 | return result; |
1058 | } | |
1059 | EXPORT_SYMBOL(ieee80211_register_hw); | |
1060 | ||
f0706e82 JB |
1061 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
1062 | { | |
1063 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 JB |
1064 | |
1065 | tasklet_kill(&local->tx_pending_tasklet); | |
1066 | tasklet_kill(&local->tasklet); | |
1067 | ||
10f644a4 JB |
1068 | pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, |
1069 | &local->network_latency_notifier); | |
1070 | ||
f0706e82 JB |
1071 | rtnl_lock(); |
1072 | ||
79010420 JB |
1073 | /* |
1074 | * At this point, interface list manipulations are fine | |
1075 | * because the driver cannot be handing us frames any | |
1076 | * more and the tasklet is killed. | |
1077 | */ | |
5b2812e9 | 1078 | |
75636525 JB |
1079 | /* First, we remove all virtual interfaces. */ |
1080 | ieee80211_remove_interfaces(local); | |
5b2812e9 JB |
1081 | |
1082 | /* then, finally, remove the master interface */ | |
3e122be0 | 1083 | unregister_netdevice(local->mdev); |
f0706e82 JB |
1084 | |
1085 | rtnl_unlock(); | |
1086 | ||
f0706e82 JB |
1087 | ieee80211_clear_tx_pending(local); |
1088 | sta_info_stop(local); | |
1089 | rate_control_deinitialize(local); | |
e9f207f0 | 1090 | debugfs_hw_del(local); |
f0706e82 | 1091 | |
f0706e82 JB |
1092 | if (skb_queue_len(&local->skb_queue) |
1093 | || skb_queue_len(&local->skb_queue_unreliable)) | |
1094 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 1095 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1096 | skb_queue_purge(&local->skb_queue); |
1097 | skb_queue_purge(&local->skb_queue_unreliable); | |
1098 | ||
1099 | destroy_workqueue(local->hw.workqueue); | |
1100 | wiphy_unregister(local->hw.wiphy); | |
1101 | ieee80211_wep_free(local); | |
1102 | ieee80211_led_exit(local); | |
3e122be0 | 1103 | free_netdev(local->mdev); |
2a519311 | 1104 | kfree(local->int_scan_req.channels); |
f0706e82 JB |
1105 | } |
1106 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1107 | ||
1108 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1109 | { | |
1110 | struct ieee80211_local *local = hw_to_local(hw); | |
1111 | ||
c771c9d8 | 1112 | mutex_destroy(&local->iflist_mtx); |
f3b85252 | 1113 | mutex_destroy(&local->scan_mtx); |
c771c9d8 | 1114 | |
f0706e82 JB |
1115 | wiphy_free(local->hw.wiphy); |
1116 | } | |
1117 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1118 | ||
f0706e82 JB |
1119 | static int __init ieee80211_init(void) |
1120 | { | |
1121 | struct sk_buff *skb; | |
1122 | int ret; | |
1123 | ||
e039fa4a JB |
1124 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1125 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
c6a1fa12 | 1126 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); |
f0706e82 | 1127 | |
cccf129f FF |
1128 | ret = rc80211_minstrel_init(); |
1129 | if (ret) | |
1130 | return ret; | |
1131 | ||
4b475898 | 1132 | ret = rc80211_pid_init(); |
ad018375 | 1133 | if (ret) |
51cb6db0 | 1134 | return ret; |
f0706e82 | 1135 | |
e9f207f0 JB |
1136 | ieee80211_debugfs_netdev_init(); |
1137 | ||
f0706e82 JB |
1138 | return 0; |
1139 | } | |
1140 | ||
f0706e82 JB |
1141 | static void __exit ieee80211_exit(void) |
1142 | { | |
4b475898 | 1143 | rc80211_pid_exit(); |
cccf129f | 1144 | rc80211_minstrel_exit(); |
ac71c691 | 1145 | |
3b96766f JB |
1146 | /* |
1147 | * For key todo, it'll be empty by now but the work | |
1148 | * might still be scheduled. | |
1149 | */ | |
1150 | flush_scheduled_work(); | |
1151 | ||
f7a92144 LCC |
1152 | if (mesh_allocated) |
1153 | ieee80211s_stop(); | |
902acc78 | 1154 | |
e9f207f0 | 1155 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1156 | } |
1157 | ||
1158 | ||
ca9938fe | 1159 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1160 | module_exit(ieee80211_exit); |
1161 | ||
1162 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1163 | MODULE_LICENSE("GPL"); |