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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> |
881d966b | 24 | #include <net/net_namespace.h> |
f0706e82 JB |
25 | #include <net/cfg80211.h> |
26 | ||
f0706e82 | 27 | #include "ieee80211_i.h" |
2c8dccc7 | 28 | #include "rate.h" |
f7a92144 | 29 | #include "mesh.h" |
f0706e82 | 30 | #include "wep.h" |
f0706e82 JB |
31 | #include "wme.h" |
32 | #include "aes_ccm.h" | |
2c8dccc7 | 33 | #include "led.h" |
e0eb6859 | 34 | #include "cfg.h" |
e9f207f0 JB |
35 | #include "debugfs.h" |
36 | #include "debugfs_netdev.h" | |
f0706e82 | 37 | |
b306f453 JB |
38 | /* |
39 | * For seeing transmitted packets on monitor interfaces | |
40 | * we have a radiotap header too. | |
41 | */ | |
42 | struct ieee80211_tx_status_rtap_hdr { | |
43 | struct ieee80211_radiotap_header hdr; | |
e6a9854b JB |
44 | u8 rate; |
45 | u8 padding_for_rate; | |
b306f453 JB |
46 | __le16 tx_flags; |
47 | u8 data_retries; | |
48 | } __attribute__ ((packed)); | |
49 | ||
f0706e82 | 50 | |
4150c572 | 51 | /* must be called under mdev tx lock */ |
0d143fe1 | 52 | void ieee80211_configure_filter(struct ieee80211_local *local) |
4150c572 JB |
53 | { |
54 | unsigned int changed_flags; | |
55 | unsigned int new_flags = 0; | |
56 | ||
53918994 | 57 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
58 | new_flags |= FIF_PROMISC_IN_BSS; |
59 | ||
53918994 | 60 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
61 | new_flags |= FIF_ALLMULTI; |
62 | ||
63 | if (local->monitors) | |
8cc9a739 MW |
64 | new_flags |= FIF_BCN_PRBRESP_PROMISC; |
65 | ||
66 | if (local->fif_fcsfail) | |
67 | new_flags |= FIF_FCSFAIL; | |
68 | ||
69 | if (local->fif_plcpfail) | |
70 | new_flags |= FIF_PLCPFAIL; | |
71 | ||
72 | if (local->fif_control) | |
73 | new_flags |= FIF_CONTROL; | |
74 | ||
75 | if (local->fif_other_bss) | |
76 | new_flags |= FIF_OTHER_BSS; | |
4150c572 JB |
77 | |
78 | changed_flags = local->filter_flags ^ new_flags; | |
79 | ||
80 | /* be a bit nasty */ | |
81 | new_flags |= (1<<31); | |
82 | ||
83 | local->ops->configure_filter(local_to_hw(local), | |
84 | changed_flags, &new_flags, | |
85 | local->mdev->mc_count, | |
86 | local->mdev->mc_list); | |
87 | ||
88 | WARN_ON(new_flags & (1<<31)); | |
89 | ||
90 | local->filter_flags = new_flags & ~(1<<31); | |
91 | } | |
92 | ||
b2c258fb | 93 | /* master interface */ |
f0706e82 | 94 | |
0d143fe1 JB |
95 | static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr) |
96 | { | |
97 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
98 | return ETH_ALEN; | |
99 | } | |
100 | ||
101 | static const struct header_ops ieee80211_header_ops = { | |
102 | .create = eth_header, | |
103 | .parse = header_parse_80211, | |
104 | .rebuild = eth_rebuild_header, | |
105 | .cache = eth_header_cache, | |
106 | .cache_update = eth_header_cache_update, | |
107 | }; | |
108 | ||
b2c258fb JB |
109 | static int ieee80211_master_open(struct net_device *dev) |
110 | { | |
133b8226 JB |
111 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
112 | struct ieee80211_local *local = mpriv->local; | |
b2c258fb JB |
113 | struct ieee80211_sub_if_data *sdata; |
114 | int res = -EOPNOTSUPP; | |
f0706e82 | 115 | |
79010420 JB |
116 | /* we hold the RTNL here so can safely walk the list */ |
117 | list_for_each_entry(sdata, &local->interfaces, list) { | |
3e122be0 | 118 | if (netif_running(sdata->dev)) { |
b2c258fb JB |
119 | res = 0; |
120 | break; | |
121 | } | |
122 | } | |
36d6825b JB |
123 | |
124 | if (res) | |
125 | return res; | |
126 | ||
51cb6db0 | 127 | netif_tx_start_all_queues(local->mdev); |
36d6825b JB |
128 | |
129 | return 0; | |
b2c258fb | 130 | } |
f0706e82 | 131 | |
b2c258fb | 132 | static int ieee80211_master_stop(struct net_device *dev) |
f0706e82 | 133 | { |
133b8226 JB |
134 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
135 | struct ieee80211_local *local = mpriv->local; | |
b2c258fb | 136 | struct ieee80211_sub_if_data *sdata; |
f0706e82 | 137 | |
79010420 JB |
138 | /* we hold the RTNL here so can safely walk the list */ |
139 | list_for_each_entry(sdata, &local->interfaces, list) | |
3e122be0 | 140 | if (netif_running(sdata->dev)) |
b2c258fb | 141 | dev_close(sdata->dev); |
f0706e82 | 142 | |
b2c258fb JB |
143 | return 0; |
144 | } | |
f0706e82 | 145 | |
4150c572 JB |
146 | static void ieee80211_master_set_multicast_list(struct net_device *dev) |
147 | { | |
133b8226 JB |
148 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
149 | struct ieee80211_local *local = mpriv->local; | |
4150c572 JB |
150 | |
151 | ieee80211_configure_filter(local); | |
152 | } | |
153 | ||
b2c258fb JB |
154 | /* everything else */ |
155 | ||
9d139c81 | 156 | int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) |
b2c258fb | 157 | { |
9d139c81 | 158 | struct ieee80211_local *local = sdata->local; |
b2c258fb | 159 | struct ieee80211_if_conf conf; |
b2c258fb | 160 | |
9d139c81 JB |
161 | if (WARN_ON(!netif_running(sdata->dev))) |
162 | return 0; | |
163 | ||
7a725f73 JB |
164 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
165 | return -EINVAL; | |
166 | ||
9d139c81 | 167 | if (!local->ops->config_interface) |
f0706e82 | 168 | return 0; |
f0706e82 | 169 | |
b2c258fb | 170 | memset(&conf, 0, sizeof(conf)); |
9d139c81 | 171 | |
05c914fe | 172 | if (sdata->vif.type == NL80211_IFTYPE_STATION || |
41bb73ee | 173 | sdata->vif.type == NL80211_IFTYPE_ADHOC) |
4150c572 | 174 | conf.bssid = sdata->u.sta.bssid; |
41bb73ee | 175 | else if (sdata->vif.type == NL80211_IFTYPE_AP) |
9d139c81 | 176 | conf.bssid = sdata->dev->dev_addr; |
41bb73ee | 177 | else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
5f936f11 | 178 | static const u8 zero[ETH_ALEN] = { 0 }; |
9d139c81 | 179 | conf.bssid = zero; |
9d139c81 JB |
180 | } else { |
181 | WARN_ON(1); | |
182 | return -EINVAL; | |
f0706e82 | 183 | } |
f0706e82 | 184 | |
078e1e60 JB |
185 | switch (sdata->vif.type) { |
186 | case NL80211_IFTYPE_AP: | |
187 | case NL80211_IFTYPE_ADHOC: | |
188 | case NL80211_IFTYPE_MESH_POINT: | |
189 | break; | |
190 | default: | |
191 | /* do not warn to simplify caller in scan.c */ | |
192 | changed &= ~IEEE80211_IFCC_BEACON_ENABLED; | |
193 | if (WARN_ON(changed & IEEE80211_IFCC_BEACON)) | |
194 | return -EINVAL; | |
195 | changed &= ~IEEE80211_IFCC_BEACON; | |
196 | break; | |
197 | } | |
198 | ||
199 | if (changed & IEEE80211_IFCC_BEACON_ENABLED) { | |
200 | if (local->sw_scanning) { | |
201 | conf.enable_beacon = false; | |
202 | } else { | |
203 | /* | |
204 | * Beacon should be enabled, but AP mode must | |
205 | * check whether there is a beacon configured. | |
206 | */ | |
207 | switch (sdata->vif.type) { | |
208 | case NL80211_IFTYPE_AP: | |
209 | conf.enable_beacon = | |
210 | !!rcu_dereference(sdata->u.ap.beacon); | |
211 | break; | |
212 | case NL80211_IFTYPE_ADHOC: | |
5e133362 JB |
213 | conf.enable_beacon = !!sdata->u.sta.probe_resp; |
214 | break; | |
078e1e60 JB |
215 | case NL80211_IFTYPE_MESH_POINT: |
216 | conf.enable_beacon = true; | |
217 | break; | |
218 | default: | |
219 | /* not reached */ | |
220 | WARN_ON(1); | |
221 | break; | |
222 | } | |
223 | } | |
224 | } | |
225 | ||
9d139c81 JB |
226 | if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID))) |
227 | return -EINVAL; | |
f0706e82 | 228 | |
078e1e60 JB |
229 | conf.changed = changed; |
230 | ||
9d139c81 JB |
231 | return local->ops->config_interface(local_to_hw(local), |
232 | &sdata->vif, &conf); | |
b2c258fb | 233 | } |
f0706e82 | 234 | |
e8975581 | 235 | int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) |
b2c258fb | 236 | { |
b2c258fb JB |
237 | struct ieee80211_channel *chan; |
238 | int ret = 0; | |
e8975581 | 239 | int power; |
094d05dc | 240 | enum nl80211_channel_type channel_type; |
f0706e82 | 241 | |
cb121bad JB |
242 | might_sleep(); |
243 | ||
72bdcf34 | 244 | if (local->sw_scanning) { |
b2c258fb | 245 | chan = local->scan_channel; |
094d05dc | 246 | channel_type = NL80211_CHAN_NO_HT; |
72bdcf34 | 247 | } else { |
b2c258fb | 248 | chan = local->oper_channel; |
094d05dc | 249 | channel_type = local->oper_channel_type; |
72bdcf34 | 250 | } |
f0706e82 | 251 | |
72bdcf34 | 252 | if (chan != local->hw.conf.channel || |
4797938c | 253 | channel_type != local->hw.conf.channel_type) { |
e8975581 | 254 | local->hw.conf.channel = chan; |
4797938c | 255 | local->hw.conf.channel_type = channel_type; |
e8975581 JB |
256 | changed |= IEEE80211_CONF_CHANGE_CHANNEL; |
257 | } | |
8318d78a | 258 | |
a8302de9 | 259 | if (local->sw_scanning) |
e8975581 | 260 | power = chan->max_power; |
8318d78a | 261 | else |
a8302de9 VT |
262 | power = local->power_constr_level ? |
263 | (chan->max_power - local->power_constr_level) : | |
264 | chan->max_power; | |
265 | ||
266 | if (local->user_power_level) | |
267 | power = min(power, local->user_power_level); | |
268 | ||
e8975581 JB |
269 | if (local->hw.conf.power_level != power) { |
270 | changed |= IEEE80211_CONF_CHANGE_POWER; | |
271 | local->hw.conf.power_level = power; | |
272 | } | |
b2c258fb | 273 | |
e8975581 JB |
274 | if (changed && local->open_count) { |
275 | ret = local->ops->config(local_to_hw(local), changed); | |
d73782fd | 276 | /* |
447107fb | 277 | * Goal: |
d73782fd JB |
278 | * HW reconfiguration should never fail, the driver has told |
279 | * us what it can support so it should live up to that promise. | |
447107fb RC |
280 | * |
281 | * Current status: | |
282 | * rfkill is not integrated with mac80211 and a | |
283 | * configuration command can thus fail if hardware rfkill | |
284 | * is enabled | |
285 | * | |
286 | * FIXME: integrate rfkill with mac80211 and then add this | |
287 | * WARN_ON() back | |
288 | * | |
d73782fd | 289 | */ |
447107fb | 290 | /* WARN_ON(ret); */ |
d73782fd | 291 | } |
f0706e82 | 292 | |
b2c258fb JB |
293 | return ret; |
294 | } | |
f0706e82 | 295 | |
471b3efd JB |
296 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
297 | u32 changed) | |
d9430a32 | 298 | { |
471b3efd JB |
299 | struct ieee80211_local *local = sdata->local; |
300 | ||
7a725f73 JB |
301 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
302 | return; | |
303 | ||
471b3efd JB |
304 | if (!changed) |
305 | return; | |
306 | ||
307 | if (local->ops->bss_info_changed) | |
308 | local->ops->bss_info_changed(local_to_hw(local), | |
309 | &sdata->vif, | |
bda3933a | 310 | &sdata->vif.bss_conf, |
471b3efd | 311 | changed); |
d9430a32 DD |
312 | } |
313 | ||
f698d856 | 314 | u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
d9430a32 | 315 | { |
bda3933a JB |
316 | sdata->vif.bss_conf.use_cts_prot = false; |
317 | sdata->vif.bss_conf.use_short_preamble = false; | |
318 | sdata->vif.bss_conf.use_short_slot = false; | |
7a5158ef JB |
319 | return BSS_CHANGED_ERP_CTS_PROT | |
320 | BSS_CHANGED_ERP_PREAMBLE | | |
321 | BSS_CHANGED_ERP_SLOT; | |
d9430a32 DD |
322 | } |
323 | ||
f0706e82 | 324 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 325 | struct sk_buff *skb) |
f0706e82 JB |
326 | { |
327 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 328 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
329 | int tmp; |
330 | ||
331 | skb->dev = local->mdev; | |
f0706e82 | 332 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 333 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
334 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
335 | tmp = skb_queue_len(&local->skb_queue) + | |
336 | skb_queue_len(&local->skb_queue_unreliable); | |
337 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
338 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
339 | dev_kfree_skb_irq(skb); |
340 | tmp--; | |
341 | I802_DEBUG_INC(local->tx_status_drop); | |
342 | } | |
343 | tasklet_schedule(&local->tasklet); | |
344 | } | |
345 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
346 | ||
347 | static void ieee80211_tasklet_handler(unsigned long data) | |
348 | { | |
349 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
350 | struct sk_buff *skb; | |
351 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 352 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
353 | |
354 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
355 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
356 | switch (skb->pkt_type) { | |
357 | case IEEE80211_RX_MSG: | |
358 | /* status is in skb->cb */ | |
359 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 360 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
361 | * netstack. */ |
362 | skb->pkt_type = 0; | |
363 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
364 | break; | |
365 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 366 | skb->pkt_type = 0; |
e039fa4a | 367 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 368 | break; |
eadc8d9e RR |
369 | case IEEE80211_DELBA_MSG: |
370 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
371 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
372 | ra_tid->ra, ra_tid->tid); | |
373 | dev_kfree_skb(skb); | |
374 | break; | |
375 | case IEEE80211_ADDBA_MSG: | |
376 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
377 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
378 | ra_tid->ra, ra_tid->tid); | |
379 | dev_kfree_skb(skb); | |
380 | break ; | |
f4ea83dd | 381 | default: |
5e3f3089 LF |
382 | WARN(1, "mac80211: Packet is of unknown type %d\n", |
383 | skb->pkt_type); | |
f0706e82 JB |
384 | dev_kfree_skb(skb); |
385 | break; | |
386 | } | |
387 | } | |
388 | } | |
389 | ||
f0706e82 JB |
390 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
391 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
392 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
d0f09804 | 393 | */ |
f0706e82 JB |
394 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, |
395 | struct ieee80211_key *key, | |
e039fa4a | 396 | struct sk_buff *skb) |
f0706e82 | 397 | { |
62bf1d76 HH |
398 | unsigned int hdrlen, iv_len, mic_len; |
399 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
f0706e82 | 400 | |
62bf1d76 | 401 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
f0706e82 JB |
402 | |
403 | if (!key) | |
404 | goto no_key; | |
405 | ||
8f20fc24 | 406 | switch (key->conf.alg) { |
f0706e82 JB |
407 | case ALG_WEP: |
408 | iv_len = WEP_IV_LEN; | |
409 | mic_len = WEP_ICV_LEN; | |
410 | break; | |
411 | case ALG_TKIP: | |
412 | iv_len = TKIP_IV_LEN; | |
413 | mic_len = TKIP_ICV_LEN; | |
414 | break; | |
415 | case ALG_CCMP: | |
416 | iv_len = CCMP_HDR_LEN; | |
417 | mic_len = CCMP_MIC_LEN; | |
418 | break; | |
419 | default: | |
420 | goto no_key; | |
421 | } | |
422 | ||
62bf1d76 | 423 | if (skb->len >= hdrlen + mic_len && |
11a843b7 | 424 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 | 425 | skb_trim(skb, skb->len - mic_len); |
62bf1d76 | 426 | if (skb->len >= hdrlen + iv_len) { |
f0706e82 | 427 | memmove(skb->data + iv_len, skb->data, hdrlen); |
62bf1d76 | 428 | hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len); |
f0706e82 JB |
429 | } |
430 | ||
431 | no_key: | |
62bf1d76 HH |
432 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
433 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
434 | memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, | |
435 | hdrlen - IEEE80211_QOS_CTL_LEN); | |
436 | skb_pull(skb, IEEE80211_QOS_CTL_LEN); | |
f0706e82 JB |
437 | } |
438 | } | |
439 | ||
d46e144b JB |
440 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
441 | struct sta_info *sta, | |
e039fa4a | 442 | struct sk_buff *skb) |
d46e144b JB |
443 | { |
444 | sta->tx_filtered_count++; | |
445 | ||
446 | /* | |
447 | * Clear the TX filter mask for this STA when sending the next | |
448 | * packet. If the STA went to power save mode, this will happen | |
f6d97104 | 449 | * when it wakes up for the next time. |
d46e144b | 450 | */ |
07346f81 | 451 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
452 | |
453 | /* | |
454 | * This code races in the following way: | |
455 | * | |
456 | * (1) STA sends frame indicating it will go to sleep and does so | |
457 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
458 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
459 | * (4) we get TX status before having processed the frame and | |
460 | * knowing that the STA has gone to sleep. | |
461 | * | |
462 | * This is actually quite unlikely even when both those events are | |
463 | * processed from interrupts coming in quickly after one another or | |
464 | * even at the same time because we queue both TX status events and | |
465 | * RX frames to be processed by a tasklet and process them in the | |
466 | * same order that they were received or TX status last. Hence, there | |
467 | * is no race as long as the frame RX is processed before the next TX | |
468 | * status, which drivers can ensure, see below. | |
469 | * | |
470 | * Note that this can only happen if the hardware or firmware can | |
471 | * actually add STAs to the filter list, if this is done by the | |
472 | * driver in response to set_tim() (which will only reduce the race | |
473 | * this whole filtering tries to solve, not completely solve it) | |
474 | * this situation cannot happen. | |
475 | * | |
476 | * To completely solve this race drivers need to make sure that they | |
477 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
478 | * functions and | |
479 | * (b) always process RX events before TX status events if ordering | |
480 | * can be unknown, for example with different interrupt status | |
481 | * bits. | |
482 | */ | |
07346f81 | 483 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 484 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 485 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
486 | skb_queue_tail(&sta->tx_filtered, skb); |
487 | return; | |
488 | } | |
489 | ||
8b30b1fe | 490 | if (!test_sta_flags(sta, WLAN_STA_PS) && !skb->requeue) { |
d46e144b | 491 | /* Software retry the packet once */ |
8b30b1fe | 492 | skb->requeue = 1; |
e039fa4a | 493 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
494 | dev_queue_xmit(skb); |
495 | return; | |
496 | } | |
497 | ||
f4ea83dd | 498 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
d46e144b JB |
499 | if (net_ratelimit()) |
500 | printk(KERN_DEBUG "%s: dropped TX filtered frame, " | |
501 | "queue_len=%d PS=%d @%lu\n", | |
502 | wiphy_name(local->hw.wiphy), | |
503 | skb_queue_len(&sta->tx_filtered), | |
07346f81 | 504 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
f4ea83dd | 505 | #endif |
d46e144b JB |
506 | dev_kfree_skb(skb); |
507 | } | |
508 | ||
e039fa4a | 509 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
510 | { |
511 | struct sk_buff *skb2; | |
512 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
513 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 514 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 515 | u16 frag, type; |
429a3805 | 516 | __le16 fc; |
4b7679a5 | 517 | struct ieee80211_supported_band *sband; |
b306f453 JB |
518 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
519 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 520 | struct net_device *prev_dev = NULL; |
429a3805 | 521 | struct sta_info *sta; |
e6a9854b JB |
522 | int retry_count = -1, i; |
523 | ||
524 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
525 | /* the HW cannot have attempted that rate */ | |
526 | if (i >= hw->max_rates) { | |
527 | info->status.rates[i].idx = -1; | |
528 | info->status.rates[i].count = 0; | |
529 | } | |
530 | ||
531 | retry_count += info->status.rates[i].count; | |
532 | } | |
533 | if (retry_count < 0) | |
534 | retry_count = 0; | |
f0706e82 | 535 | |
d0709a65 JB |
536 | rcu_read_lock(); |
537 | ||
e6a9854b JB |
538 | sband = local->hw.wiphy->bands[info->band]; |
539 | ||
95dac040 JB |
540 | sta = sta_info_get(local, hdr->addr1); |
541 | ||
542 | if (sta) { | |
e6a9854b | 543 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
95dac040 JB |
544 | test_sta_flags(sta, WLAN_STA_PS)) { |
545 | /* | |
546 | * The STA is in power save mode, so assume | |
547 | * that this TX packet failed because of that. | |
548 | */ | |
549 | ieee80211_handle_filtered_frame(local, sta, skb); | |
550 | rcu_read_unlock(); | |
551 | return; | |
f0706e82 | 552 | } |
f0706e82 | 553 | |
95dac040 JB |
554 | fc = hdr->frame_control; |
555 | ||
556 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && | |
557 | (ieee80211_is_data_qos(fc))) { | |
558 | u16 tid, ssn; | |
559 | u8 *qc; | |
429a3805 | 560 | |
429a3805 RR |
561 | qc = ieee80211_get_qos_ctl(hdr); |
562 | tid = qc[0] & 0xf; | |
563 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
564 | & IEEE80211_SCTL_SEQ); | |
f698d856 | 565 | ieee80211_send_bar(sta->sdata, hdr->addr1, |
429a3805 RR |
566 | tid, ssn); |
567 | } | |
429a3805 | 568 | |
95dac040 | 569 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
e039fa4a | 570 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 571 | rcu_read_unlock(); |
f0706e82 | 572 | return; |
95dac040 | 573 | } else { |
e6a9854b | 574 | if (!(info->flags & IEEE80211_TX_STAT_ACK)) |
95dac040 | 575 | sta->tx_retry_failed++; |
e6a9854b | 576 | sta->tx_retry_count += retry_count; |
f0706e82 | 577 | } |
95dac040 | 578 | |
4b7679a5 | 579 | rate_control_tx_status(local, sband, sta, skb); |
95dac040 | 580 | } |
f0706e82 | 581 | |
d0709a65 JB |
582 | rcu_read_unlock(); |
583 | ||
f0706e82 JB |
584 | ieee80211_led_tx(local, 0); |
585 | ||
586 | /* SNMP counters | |
587 | * Fragments are passed to low-level drivers as separate skbs, so these | |
588 | * are actually fragments, not frames. Update frame counters only for | |
589 | * the first fragment of the frame. */ | |
590 | ||
591 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
592 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
593 | ||
e039fa4a | 594 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
595 | if (frag == 0) { |
596 | local->dot11TransmittedFrameCount++; | |
597 | if (is_multicast_ether_addr(hdr->addr1)) | |
598 | local->dot11MulticastTransmittedFrameCount++; | |
e6a9854b | 599 | if (retry_count > 0) |
f0706e82 | 600 | local->dot11RetryCount++; |
e6a9854b | 601 | if (retry_count > 1) |
f0706e82 JB |
602 | local->dot11MultipleRetryCount++; |
603 | } | |
604 | ||
605 | /* This counter shall be incremented for an acknowledged MPDU | |
606 | * with an individual address in the address 1 field or an MPDU | |
607 | * with a multicast address in the address 1 field of type Data | |
608 | * or Management. */ | |
609 | if (!is_multicast_ether_addr(hdr->addr1) || | |
610 | type == IEEE80211_FTYPE_DATA || | |
611 | type == IEEE80211_FTYPE_MGMT) | |
612 | local->dot11TransmittedFragmentCount++; | |
613 | } else { | |
614 | if (frag == 0) | |
615 | local->dot11FailedCount++; | |
616 | } | |
617 | ||
b306f453 JB |
618 | /* this was a transmitted frame, but now we want to reuse it */ |
619 | skb_orphan(skb); | |
620 | ||
3d30d949 MW |
621 | /* |
622 | * This is a bit racy but we can avoid a lot of work | |
623 | * with this test... | |
624 | */ | |
625 | if (!local->monitors && !local->cooked_mntrs) { | |
f0706e82 JB |
626 | dev_kfree_skb(skb); |
627 | return; | |
628 | } | |
629 | ||
b306f453 | 630 | /* send frame to monitor interfaces now */ |
f0706e82 | 631 | |
b306f453 JB |
632 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
633 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
634 | dev_kfree_skb(skb); |
635 | return; | |
636 | } | |
f0706e82 | 637 | |
988c0f72 | 638 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
639 | skb_push(skb, sizeof(*rthdr)); |
640 | ||
641 | memset(rthdr, 0, sizeof(*rthdr)); | |
642 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
643 | rthdr->hdr.it_present = | |
644 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
e6a9854b JB |
645 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES) | |
646 | (1 << IEEE80211_RADIOTAP_RATE)); | |
b306f453 | 647 | |
e039fa4a | 648 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
649 | !is_multicast_ether_addr(hdr->addr1)) |
650 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
651 | ||
e6a9854b JB |
652 | /* |
653 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
654 | * extensions proposal contains, we can actually report | |
655 | * the whole set of tries we did. | |
656 | */ | |
657 | if ((info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) || | |
658 | (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) | |
b306f453 | 659 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e6a9854b | 660 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b306f453 | 661 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
e6a9854b JB |
662 | if (info->status.rates[0].idx >= 0 && |
663 | !(info->status.rates[0].flags & IEEE80211_TX_RC_MCS)) | |
664 | rthdr->rate = sband->bitrates[ | |
665 | info->status.rates[0].idx].bitrate / 5; | |
b306f453 | 666 | |
e6a9854b JB |
667 | /* for now report the total retry_count */ |
668 | rthdr->data_retries = retry_count; | |
b306f453 | 669 | |
3d30d949 MW |
670 | /* XXX: is this sufficient for BPF? */ |
671 | skb_set_mac_header(skb, 0); | |
672 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
673 | skb->pkt_type = PACKET_OTHERHOST; | |
674 | skb->protocol = htons(ETH_P_802_2); | |
675 | memset(skb->cb, 0, sizeof(skb->cb)); | |
676 | ||
79010420 | 677 | rcu_read_lock(); |
79010420 | 678 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
05c914fe | 679 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
b306f453 JB |
680 | if (!netif_running(sdata->dev)) |
681 | continue; | |
3d30d949 MW |
682 | |
683 | if (prev_dev) { | |
79010420 | 684 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
685 | if (skb2) { |
686 | skb2->dev = prev_dev; | |
687 | netif_rx(skb2); | |
688 | } | |
689 | } | |
690 | ||
691 | prev_dev = sdata->dev; | |
b306f453 JB |
692 | } |
693 | } | |
3d30d949 MW |
694 | if (prev_dev) { |
695 | skb->dev = prev_dev; | |
696 | netif_rx(skb); | |
697 | skb = NULL; | |
698 | } | |
79010420 | 699 | rcu_read_unlock(); |
3d30d949 | 700 | dev_kfree_skb(skb); |
f0706e82 JB |
701 | } |
702 | EXPORT_SYMBOL(ieee80211_tx_status); | |
703 | ||
f0706e82 JB |
704 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
705 | const struct ieee80211_ops *ops) | |
706 | { | |
f0706e82 | 707 | struct ieee80211_local *local; |
f0706e82 JB |
708 | int priv_size; |
709 | struct wiphy *wiphy; | |
710 | ||
711 | /* Ensure 32-byte alignment of our private data and hw private data. | |
712 | * We use the wiphy priv data for both our ieee80211_local and for | |
713 | * the driver's private data | |
714 | * | |
715 | * In memory it'll be like this: | |
716 | * | |
717 | * +-------------------------+ | |
718 | * | struct wiphy | | |
719 | * +-------------------------+ | |
720 | * | struct ieee80211_local | | |
721 | * +-------------------------+ | |
722 | * | driver's private data | | |
723 | * +-------------------------+ | |
724 | * | |
725 | */ | |
726 | priv_size = ((sizeof(struct ieee80211_local) + | |
727 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
728 | priv_data_len; | |
729 | ||
730 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
731 | ||
732 | if (!wiphy) | |
733 | return NULL; | |
734 | ||
735 | wiphy->privid = mac80211_wiphy_privid; | |
2a519311 | 736 | wiphy->max_scan_ssids = 4; |
00d3f14c JB |
737 | /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */ |
738 | wiphy->bss_priv_size = sizeof(struct ieee80211_bss) - | |
739 | sizeof(struct cfg80211_bss); | |
f0706e82 JB |
740 | |
741 | local = wiphy_priv(wiphy); | |
742 | local->hw.wiphy = wiphy; | |
743 | ||
744 | local->hw.priv = (char *)local + | |
745 | ((sizeof(struct ieee80211_local) + | |
746 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
747 | ||
4480f15c | 748 | BUG_ON(!ops->tx); |
4150c572 JB |
749 | BUG_ON(!ops->start); |
750 | BUG_ON(!ops->stop); | |
4480f15c JB |
751 | BUG_ON(!ops->config); |
752 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
753 | BUG_ON(!ops->remove_interface); |
754 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
755 | local->ops = ops; |
756 | ||
e6a9854b JB |
757 | /* set up some defaults */ |
758 | local->hw.queues = 1; | |
759 | local->hw.max_rates = 1; | |
f0706e82 JB |
760 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; |
761 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
9124b077 JB |
762 | local->hw.conf.long_frame_max_tx_count = 4; |
763 | local->hw.conf.short_frame_max_tx_count = 7; | |
e8975581 | 764 | local->hw.conf.radio_enabled = true; |
f0706e82 | 765 | |
79010420 | 766 | INIT_LIST_HEAD(&local->interfaces); |
c771c9d8 | 767 | mutex_init(&local->iflist_mtx); |
f0706e82 | 768 | |
b16bd15c JB |
769 | spin_lock_init(&local->key_lock); |
770 | ||
ce7c9111 KV |
771 | spin_lock_init(&local->queue_stop_reason_lock); |
772 | ||
c2b13452 | 773 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
f0706e82 | 774 | |
520eb820 KV |
775 | INIT_WORK(&local->dynamic_ps_enable_work, |
776 | ieee80211_dynamic_ps_enable_work); | |
777 | INIT_WORK(&local->dynamic_ps_disable_work, | |
778 | ieee80211_dynamic_ps_disable_work); | |
779 | setup_timer(&local->dynamic_ps_timer, | |
780 | ieee80211_dynamic_ps_timer, (unsigned long) local); | |
781 | ||
f0706e82 JB |
782 | sta_info_init(local); |
783 | ||
f0706e82 JB |
784 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
785 | (unsigned long)local); | |
786 | tasklet_disable(&local->tx_pending_tasklet); | |
787 | ||
788 | tasklet_init(&local->tasklet, | |
789 | ieee80211_tasklet_handler, | |
790 | (unsigned long) local); | |
791 | tasklet_disable(&local->tasklet); | |
792 | ||
793 | skb_queue_head_init(&local->skb_queue); | |
794 | skb_queue_head_init(&local->skb_queue_unreliable); | |
795 | ||
796 | return local_to_hw(local); | |
797 | } | |
798 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
799 | ||
7230645e JB |
800 | static const struct net_device_ops ieee80211_master_ops = { |
801 | .ndo_start_xmit = ieee80211_master_start_xmit, | |
802 | .ndo_open = ieee80211_master_open, | |
803 | .ndo_stop = ieee80211_master_stop, | |
804 | .ndo_set_multicast_list = ieee80211_master_set_multicast_list, | |
805 | .ndo_select_queue = ieee80211_select_queue, | |
806 | }; | |
807 | ||
808 | static void ieee80211_master_setup(struct net_device *mdev) | |
809 | { | |
810 | mdev->type = ARPHRD_IEEE80211; | |
811 | mdev->netdev_ops = &ieee80211_master_ops; | |
812 | mdev->header_ops = &ieee80211_header_ops; | |
813 | mdev->tx_queue_len = 1000; | |
814 | mdev->addr_len = ETH_ALEN; | |
815 | } | |
816 | ||
f0706e82 JB |
817 | int ieee80211_register_hw(struct ieee80211_hw *hw) |
818 | { | |
819 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 | 820 | int result; |
8318d78a | 821 | enum ieee80211_band band; |
96d51056 | 822 | struct net_device *mdev; |
133b8226 | 823 | struct ieee80211_master_priv *mpriv; |
2a519311 | 824 | int channels, i, j; |
8318d78a JB |
825 | |
826 | /* | |
827 | * generic code guarantees at least one band, | |
828 | * set this very early because much code assumes | |
829 | * that hw.conf.channel is assigned | |
830 | */ | |
2a519311 | 831 | channels = 0; |
8318d78a JB |
832 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
833 | struct ieee80211_supported_band *sband; | |
834 | ||
835 | sband = local->hw.wiphy->bands[band]; | |
2a519311 | 836 | if (sband && !local->oper_channel) { |
8318d78a JB |
837 | /* init channel we're on */ |
838 | local->hw.conf.channel = | |
839 | local->oper_channel = | |
840 | local->scan_channel = &sband->channels[0]; | |
8318d78a | 841 | } |
2a519311 JB |
842 | if (sband) |
843 | channels += sband->n_channels; | |
8318d78a | 844 | } |
f0706e82 | 845 | |
2a519311 JB |
846 | local->int_scan_req.n_channels = channels; |
847 | local->int_scan_req.channels = kzalloc(sizeof(void *) * channels, GFP_KERNEL); | |
848 | if (!local->int_scan_req.channels) | |
849 | return -ENOMEM; | |
850 | ||
f59ac048 LR |
851 | /* if low-level driver supports AP, we also support VLAN */ |
852 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) | |
853 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
854 | ||
855 | /* mac80211 always supports monitor */ | |
856 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); | |
857 | ||
f0706e82 JB |
858 | result = wiphy_register(local->hw.wiphy); |
859 | if (result < 0) | |
2a519311 | 860 | goto fail_wiphy_register; |
f0706e82 | 861 | |
e2530083 JB |
862 | /* |
863 | * We use the number of queues for feature tests (QoS, HT) internally | |
864 | * so restrict them appropriately. | |
865 | */ | |
e2530083 JB |
866 | if (hw->queues > IEEE80211_MAX_QUEUES) |
867 | hw->queues = IEEE80211_MAX_QUEUES; | |
868 | if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) | |
869 | hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; | |
870 | if (hw->queues < 4) | |
871 | hw->ampdu_queues = 0; | |
e2530083 | 872 | |
133b8226 | 873 | mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv), |
7230645e | 874 | "wmaster%d", ieee80211_master_setup, |
e2530083 | 875 | ieee80211_num_queues(hw)); |
96d51056 JB |
876 | if (!mdev) |
877 | goto fail_mdev_alloc; | |
878 | ||
133b8226 JB |
879 | mpriv = netdev_priv(mdev); |
880 | mpriv->local = local; | |
96d51056 JB |
881 | local->mdev = mdev; |
882 | ||
4ada424d | 883 | local->hw.workqueue = |
30d3ef41 | 884 | create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
885 | if (!local->hw.workqueue) { |
886 | result = -ENOMEM; | |
887 | goto fail_workqueue; | |
888 | } | |
889 | ||
b306f453 JB |
890 | /* |
891 | * The hardware needs headroom for sending the frame, | |
892 | * and we need some headroom for passing the frame to monitor | |
893 | * interfaces, but never both at the same time. | |
894 | */ | |
33ccad35 JB |
895 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
896 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 897 | |
e9f207f0 JB |
898 | debugfs_hw_add(local); |
899 | ||
dc0ae30c TW |
900 | if (local->hw.conf.beacon_int < 10) |
901 | local->hw.conf.beacon_int = 100; | |
f0706e82 | 902 | |
ea95bba4 TW |
903 | if (local->hw.max_listen_interval == 0) |
904 | local->hw.max_listen_interval = 1; | |
905 | ||
906 | local->hw.conf.listen_interval = local->hw.max_listen_interval; | |
907 | ||
f0706e82 JB |
908 | result = sta_info_start(local); |
909 | if (result < 0) | |
910 | goto fail_sta_info; | |
911 | ||
912 | rtnl_lock(); | |
913 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
914 | if (result < 0) | |
915 | goto fail_dev; | |
916 | ||
917 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
918 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
076ae609 | 919 | local->mdev->features |= NETIF_F_NETNS_LOCAL; |
f0706e82 JB |
920 | |
921 | result = register_netdevice(local->mdev); | |
922 | if (result < 0) | |
923 | goto fail_dev; | |
924 | ||
830f9038 JB |
925 | result = ieee80211_init_rate_ctrl_alg(local, |
926 | hw->rate_control_algorithm); | |
f0706e82 JB |
927 | if (result < 0) { |
928 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 929 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
930 | goto fail_rate; |
931 | } | |
932 | ||
933 | result = ieee80211_wep_init(local); | |
934 | ||
935 | if (result < 0) { | |
023a04be JF |
936 | printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", |
937 | wiphy_name(local->hw.wiphy), result); | |
f0706e82 JB |
938 | goto fail_wep; |
939 | } | |
940 | ||
8dffff21 JB |
941 | /* add one default STA interface if supported */ |
942 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { | |
943 | result = ieee80211_if_add(local, "wlan%d", NULL, | |
944 | NL80211_IFTYPE_STATION, NULL); | |
945 | if (result) | |
946 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
947 | wiphy_name(local->hw.wiphy)); | |
948 | } | |
f0706e82 | 949 | |
f0706e82 JB |
950 | rtnl_unlock(); |
951 | ||
952 | ieee80211_led_init(local); | |
953 | ||
2a519311 JB |
954 | /* alloc internal scan request */ |
955 | i = 0; | |
956 | local->int_scan_req.ssids = &local->scan_ssid; | |
957 | local->int_scan_req.n_ssids = 1; | |
958 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
959 | if (!hw->wiphy->bands[band]) | |
960 | continue; | |
961 | for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) { | |
962 | local->int_scan_req.channels[i] = | |
963 | &hw->wiphy->bands[band]->channels[j]; | |
964 | i++; | |
965 | } | |
966 | } | |
967 | ||
f0706e82 JB |
968 | return 0; |
969 | ||
970 | fail_wep: | |
971 | rate_control_deinitialize(local); | |
972 | fail_rate: | |
973 | unregister_netdevice(local->mdev); | |
339a7c41 | 974 | local->mdev = NULL; |
f0706e82 JB |
975 | fail_dev: |
976 | rtnl_unlock(); | |
977 | sta_info_stop(local); | |
978 | fail_sta_info: | |
e9f207f0 | 979 | debugfs_hw_del(local); |
f0706e82 JB |
980 | destroy_workqueue(local->hw.workqueue); |
981 | fail_workqueue: | |
3e122be0 JB |
982 | if (local->mdev) |
983 | free_netdev(local->mdev); | |
96d51056 | 984 | fail_mdev_alloc: |
f0706e82 | 985 | wiphy_unregister(local->hw.wiphy); |
2a519311 JB |
986 | fail_wiphy_register: |
987 | kfree(local->int_scan_req.channels); | |
f0706e82 JB |
988 | return result; |
989 | } | |
990 | EXPORT_SYMBOL(ieee80211_register_hw); | |
991 | ||
f0706e82 JB |
992 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
993 | { | |
994 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 JB |
995 | |
996 | tasklet_kill(&local->tx_pending_tasklet); | |
997 | tasklet_kill(&local->tasklet); | |
998 | ||
999 | rtnl_lock(); | |
1000 | ||
79010420 JB |
1001 | /* |
1002 | * At this point, interface list manipulations are fine | |
1003 | * because the driver cannot be handing us frames any | |
1004 | * more and the tasklet is killed. | |
1005 | */ | |
5b2812e9 | 1006 | |
75636525 JB |
1007 | /* First, we remove all virtual interfaces. */ |
1008 | ieee80211_remove_interfaces(local); | |
5b2812e9 JB |
1009 | |
1010 | /* then, finally, remove the master interface */ | |
3e122be0 | 1011 | unregister_netdevice(local->mdev); |
f0706e82 JB |
1012 | |
1013 | rtnl_unlock(); | |
1014 | ||
f0706e82 JB |
1015 | ieee80211_clear_tx_pending(local); |
1016 | sta_info_stop(local); | |
1017 | rate_control_deinitialize(local); | |
e9f207f0 | 1018 | debugfs_hw_del(local); |
f0706e82 | 1019 | |
f0706e82 JB |
1020 | if (skb_queue_len(&local->skb_queue) |
1021 | || skb_queue_len(&local->skb_queue_unreliable)) | |
1022 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 1023 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1024 | skb_queue_purge(&local->skb_queue); |
1025 | skb_queue_purge(&local->skb_queue_unreliable); | |
1026 | ||
1027 | destroy_workqueue(local->hw.workqueue); | |
1028 | wiphy_unregister(local->hw.wiphy); | |
1029 | ieee80211_wep_free(local); | |
1030 | ieee80211_led_exit(local); | |
3e122be0 | 1031 | free_netdev(local->mdev); |
2a519311 | 1032 | kfree(local->int_scan_req.channels); |
f0706e82 JB |
1033 | } |
1034 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1035 | ||
1036 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1037 | { | |
1038 | struct ieee80211_local *local = hw_to_local(hw); | |
1039 | ||
c771c9d8 JB |
1040 | mutex_destroy(&local->iflist_mtx); |
1041 | ||
f0706e82 JB |
1042 | wiphy_free(local->hw.wiphy); |
1043 | } | |
1044 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1045 | ||
f0706e82 JB |
1046 | static int __init ieee80211_init(void) |
1047 | { | |
1048 | struct sk_buff *skb; | |
1049 | int ret; | |
1050 | ||
e039fa4a JB |
1051 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1052 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
c6a1fa12 | 1053 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); |
f0706e82 | 1054 | |
cccf129f FF |
1055 | ret = rc80211_minstrel_init(); |
1056 | if (ret) | |
1057 | return ret; | |
1058 | ||
4b475898 | 1059 | ret = rc80211_pid_init(); |
ad018375 | 1060 | if (ret) |
51cb6db0 | 1061 | return ret; |
f0706e82 | 1062 | |
e9f207f0 JB |
1063 | ieee80211_debugfs_netdev_init(); |
1064 | ||
f0706e82 JB |
1065 | return 0; |
1066 | } | |
1067 | ||
f0706e82 JB |
1068 | static void __exit ieee80211_exit(void) |
1069 | { | |
4b475898 | 1070 | rc80211_pid_exit(); |
cccf129f | 1071 | rc80211_minstrel_exit(); |
ac71c691 | 1072 | |
3b96766f JB |
1073 | /* |
1074 | * For key todo, it'll be empty by now but the work | |
1075 | * might still be scheduled. | |
1076 | */ | |
1077 | flush_scheduled_work(); | |
1078 | ||
f7a92144 LCC |
1079 | if (mesh_allocated) |
1080 | ieee80211s_stop(); | |
902acc78 | 1081 | |
e9f207f0 | 1082 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1083 | } |
1084 | ||
1085 | ||
ca9938fe | 1086 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1087 | module_exit(ieee80211_exit); |
1088 | ||
1089 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1090 | MODULE_LICENSE("GPL"); |