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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; | |
44 | __le16 tx_flags; | |
45 | u8 data_retries; | |
46 | } __attribute__ ((packed)); | |
47 | ||
f0706e82 | 48 | |
4150c572 | 49 | /* must be called under mdev tx lock */ |
0d143fe1 | 50 | void ieee80211_configure_filter(struct ieee80211_local *local) |
4150c572 JB |
51 | { |
52 | unsigned int changed_flags; | |
53 | unsigned int new_flags = 0; | |
54 | ||
53918994 | 55 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
56 | new_flags |= FIF_PROMISC_IN_BSS; |
57 | ||
53918994 | 58 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
59 | new_flags |= FIF_ALLMULTI; |
60 | ||
61 | if (local->monitors) | |
8cc9a739 MW |
62 | new_flags |= FIF_BCN_PRBRESP_PROMISC; |
63 | ||
64 | if (local->fif_fcsfail) | |
65 | new_flags |= FIF_FCSFAIL; | |
66 | ||
67 | if (local->fif_plcpfail) | |
68 | new_flags |= FIF_PLCPFAIL; | |
69 | ||
70 | if (local->fif_control) | |
71 | new_flags |= FIF_CONTROL; | |
72 | ||
73 | if (local->fif_other_bss) | |
74 | new_flags |= FIF_OTHER_BSS; | |
4150c572 JB |
75 | |
76 | changed_flags = local->filter_flags ^ new_flags; | |
77 | ||
78 | /* be a bit nasty */ | |
79 | new_flags |= (1<<31); | |
80 | ||
81 | local->ops->configure_filter(local_to_hw(local), | |
82 | changed_flags, &new_flags, | |
83 | local->mdev->mc_count, | |
84 | local->mdev->mc_list); | |
85 | ||
86 | WARN_ON(new_flags & (1<<31)); | |
87 | ||
88 | local->filter_flags = new_flags & ~(1<<31); | |
89 | } | |
90 | ||
b2c258fb | 91 | /* master interface */ |
f0706e82 | 92 | |
0d143fe1 JB |
93 | static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr) |
94 | { | |
95 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
96 | return ETH_ALEN; | |
97 | } | |
98 | ||
99 | static const struct header_ops ieee80211_header_ops = { | |
100 | .create = eth_header, | |
101 | .parse = header_parse_80211, | |
102 | .rebuild = eth_rebuild_header, | |
103 | .cache = eth_header_cache, | |
104 | .cache_update = eth_header_cache_update, | |
105 | }; | |
106 | ||
b2c258fb JB |
107 | static int ieee80211_master_open(struct net_device *dev) |
108 | { | |
133b8226 JB |
109 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
110 | struct ieee80211_local *local = mpriv->local; | |
b2c258fb JB |
111 | struct ieee80211_sub_if_data *sdata; |
112 | int res = -EOPNOTSUPP; | |
f0706e82 | 113 | |
79010420 JB |
114 | /* we hold the RTNL here so can safely walk the list */ |
115 | list_for_each_entry(sdata, &local->interfaces, list) { | |
3e122be0 | 116 | if (netif_running(sdata->dev)) { |
b2c258fb JB |
117 | res = 0; |
118 | break; | |
119 | } | |
120 | } | |
36d6825b JB |
121 | |
122 | if (res) | |
123 | return res; | |
124 | ||
51cb6db0 | 125 | netif_tx_start_all_queues(local->mdev); |
36d6825b JB |
126 | |
127 | return 0; | |
b2c258fb | 128 | } |
f0706e82 | 129 | |
b2c258fb | 130 | static int ieee80211_master_stop(struct net_device *dev) |
f0706e82 | 131 | { |
133b8226 JB |
132 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
133 | struct ieee80211_local *local = mpriv->local; | |
b2c258fb | 134 | struct ieee80211_sub_if_data *sdata; |
f0706e82 | 135 | |
79010420 JB |
136 | /* we hold the RTNL here so can safely walk the list */ |
137 | list_for_each_entry(sdata, &local->interfaces, list) | |
3e122be0 | 138 | if (netif_running(sdata->dev)) |
b2c258fb | 139 | dev_close(sdata->dev); |
f0706e82 | 140 | |
b2c258fb JB |
141 | return 0; |
142 | } | |
f0706e82 | 143 | |
4150c572 JB |
144 | static void ieee80211_master_set_multicast_list(struct net_device *dev) |
145 | { | |
133b8226 JB |
146 | struct ieee80211_master_priv *mpriv = netdev_priv(dev); |
147 | struct ieee80211_local *local = mpriv->local; | |
4150c572 JB |
148 | |
149 | ieee80211_configure_filter(local); | |
150 | } | |
151 | ||
b2c258fb JB |
152 | /* everything else */ |
153 | ||
9d139c81 | 154 | int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) |
b2c258fb | 155 | { |
9d139c81 | 156 | struct ieee80211_local *local = sdata->local; |
b2c258fb | 157 | struct ieee80211_if_conf conf; |
b2c258fb | 158 | |
9d139c81 JB |
159 | if (WARN_ON(!netif_running(sdata->dev))) |
160 | return 0; | |
161 | ||
7a725f73 JB |
162 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
163 | return -EINVAL; | |
164 | ||
9d139c81 | 165 | if (!local->ops->config_interface) |
f0706e82 | 166 | return 0; |
f0706e82 | 167 | |
b2c258fb | 168 | memset(&conf, 0, sizeof(conf)); |
9d139c81 JB |
169 | conf.changed = changed; |
170 | ||
05c914fe JB |
171 | if (sdata->vif.type == NL80211_IFTYPE_STATION || |
172 | sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
4150c572 | 173 | conf.bssid = sdata->u.sta.bssid; |
b2c258fb JB |
174 | conf.ssid = sdata->u.sta.ssid; |
175 | conf.ssid_len = sdata->u.sta.ssid_len; | |
05c914fe | 176 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
9d139c81 | 177 | conf.bssid = sdata->dev->dev_addr; |
b2c258fb JB |
178 | conf.ssid = sdata->u.ap.ssid; |
179 | conf.ssid_len = sdata->u.ap.ssid_len; | |
9d139c81 JB |
180 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
181 | u8 zero[ETH_ALEN] = { 0 }; | |
182 | conf.bssid = zero; | |
183 | conf.ssid = zero; | |
184 | conf.ssid_len = 0; | |
185 | } else { | |
186 | WARN_ON(1); | |
187 | return -EINVAL; | |
f0706e82 | 188 | } |
f0706e82 | 189 | |
9d139c81 JB |
190 | if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID))) |
191 | return -EINVAL; | |
f0706e82 | 192 | |
9d139c81 JB |
193 | if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID))) |
194 | return -EINVAL; | |
f0706e82 | 195 | |
9d139c81 JB |
196 | return local->ops->config_interface(local_to_hw(local), |
197 | &sdata->vif, &conf); | |
b2c258fb | 198 | } |
f0706e82 | 199 | |
b2c258fb JB |
200 | int ieee80211_hw_config(struct ieee80211_local *local) |
201 | { | |
b2c258fb JB |
202 | struct ieee80211_channel *chan; |
203 | int ret = 0; | |
f0706e82 | 204 | |
c2b13452 | 205 | if (local->sw_scanning) |
b2c258fb | 206 | chan = local->scan_channel; |
8318d78a | 207 | else |
b2c258fb | 208 | chan = local->oper_channel; |
f0706e82 | 209 | |
8318d78a JB |
210 | local->hw.conf.channel = chan; |
211 | ||
212 | if (!local->hw.conf.power_level) | |
213 | local->hw.conf.power_level = chan->max_power; | |
214 | else | |
215 | local->hw.conf.power_level = min(chan->max_power, | |
216 | local->hw.conf.power_level); | |
217 | ||
218 | local->hw.conf.max_antenna_gain = chan->max_antenna_gain; | |
f0706e82 | 219 | |
b2c258fb | 220 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
8318d78a JB |
221 | printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n", |
222 | wiphy_name(local->hw.wiphy), chan->center_freq); | |
223 | #endif | |
b2c258fb | 224 | |
f7c4daed | 225 | if (local->open_count) |
b2c258fb | 226 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); |
f0706e82 | 227 | |
b2c258fb JB |
228 | return ret; |
229 | } | |
f0706e82 | 230 | |
d3c990fb | 231 | /** |
38668c05 TW |
232 | * ieee80211_handle_ht should be used only after legacy configuration |
233 | * has been determined namely band, as ht configuration depends upon | |
234 | * the hardware's HT abilities for a _specific_ band. | |
d3c990fb | 235 | */ |
38668c05 | 236 | u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht, |
d3c990fb RR |
237 | struct ieee80211_ht_info *req_ht_cap, |
238 | struct ieee80211_ht_bss_info *req_bss_cap) | |
239 | { | |
240 | struct ieee80211_conf *conf = &local->hw.conf; | |
8318d78a | 241 | struct ieee80211_supported_band *sband; |
38668c05 TW |
242 | struct ieee80211_ht_info ht_conf; |
243 | struct ieee80211_ht_bss_info ht_bss_conf; | |
38668c05 | 244 | u32 changed = 0; |
edcdf8b2 RR |
245 | int i; |
246 | u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS; | |
247 | u8 tx_mcs_set_cap; | |
d3c990fb | 248 | |
8318d78a JB |
249 | sband = local->hw.wiphy->bands[conf->channel->band]; |
250 | ||
edcdf8b2 RR |
251 | memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info)); |
252 | memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info)); | |
253 | ||
d3c990fb | 254 | /* HT is not supported */ |
8318d78a | 255 | if (!sband->ht_info.ht_supported) { |
d3c990fb | 256 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
edcdf8b2 | 257 | goto out; |
d3c990fb RR |
258 | } |
259 | ||
edcdf8b2 RR |
260 | /* disable HT */ |
261 | if (!enable_ht) { | |
262 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) | |
38668c05 | 263 | changed |= BSS_CHANGED_HT; |
edcdf8b2 RR |
264 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
265 | conf->ht_conf.ht_supported = 0; | |
266 | goto out; | |
267 | } | |
38668c05 | 268 | |
38668c05 | 269 | |
edcdf8b2 RR |
270 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) |
271 | changed |= BSS_CHANGED_HT; | |
38668c05 | 272 | |
edcdf8b2 RR |
273 | conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; |
274 | ht_conf.ht_supported = 1; | |
38668c05 | 275 | |
edcdf8b2 | 276 | ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap; |
00c5ae2f TW |
277 | ht_conf.cap &= ~(IEEE80211_HT_CAP_SM_PS); |
278 | ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_SM_PS; | |
edcdf8b2 RR |
279 | ht_bss_conf.primary_channel = req_bss_cap->primary_channel; |
280 | ht_bss_conf.bss_cap = req_bss_cap->bss_cap; | |
281 | ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; | |
38668c05 | 282 | |
edcdf8b2 RR |
283 | ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; |
284 | ht_conf.ampdu_density = req_ht_cap->ampdu_density; | |
38668c05 | 285 | |
edcdf8b2 RR |
286 | /* Bits 96-100 */ |
287 | tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12]; | |
288 | ||
289 | /* configure suppoerted Tx MCS according to requested MCS | |
290 | * (based in most cases on Rx capabilities of peer) and self | |
291 | * Tx MCS capabilities (as defined by low level driver HW | |
292 | * Tx capabilities) */ | |
293 | if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED)) | |
294 | goto check_changed; | |
d3c990fb | 295 | |
edcdf8b2 RR |
296 | /* Counting from 0 therfore + 1 */ |
297 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF) | |
298 | max_tx_streams = ((tx_mcs_set_cap & | |
299 | IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1; | |
300 | ||
301 | for (i = 0; i < max_tx_streams; i++) | |
302 | ht_conf.supp_mcs_set[i] = | |
303 | sband->ht_info.supp_mcs_set[i] & | |
304 | req_ht_cap->supp_mcs_set[i]; | |
305 | ||
306 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM) | |
307 | for (i = IEEE80211_SUPP_MCS_SET_UEQM; | |
308 | i < IEEE80211_SUPP_MCS_SET_LEN; i++) | |
309 | ht_conf.supp_mcs_set[i] = | |
310 | sband->ht_info.supp_mcs_set[i] & | |
311 | req_ht_cap->supp_mcs_set[i]; | |
312 | ||
313 | check_changed: | |
314 | /* if bss configuration changed store the new one */ | |
315 | if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) || | |
316 | memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) { | |
317 | changed |= BSS_CHANGED_HT; | |
318 | memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf)); | |
319 | memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf)); | |
320 | } | |
321 | out: | |
38668c05 | 322 | return changed; |
d3c990fb RR |
323 | } |
324 | ||
471b3efd JB |
325 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
326 | u32 changed) | |
d9430a32 | 327 | { |
471b3efd JB |
328 | struct ieee80211_local *local = sdata->local; |
329 | ||
7a725f73 JB |
330 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) |
331 | return; | |
332 | ||
471b3efd JB |
333 | if (!changed) |
334 | return; | |
335 | ||
336 | if (local->ops->bss_info_changed) | |
337 | local->ops->bss_info_changed(local_to_hw(local), | |
338 | &sdata->vif, | |
339 | &sdata->bss_conf, | |
340 | changed); | |
d9430a32 DD |
341 | } |
342 | ||
f698d856 | 343 | u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
d9430a32 | 344 | { |
471b3efd JB |
345 | sdata->bss_conf.use_cts_prot = 0; |
346 | sdata->bss_conf.use_short_preamble = 0; | |
fc32f924 | 347 | return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE; |
d9430a32 DD |
348 | } |
349 | ||
f0706e82 | 350 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 351 | struct sk_buff *skb) |
f0706e82 JB |
352 | { |
353 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 354 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
355 | int tmp; |
356 | ||
357 | skb->dev = local->mdev; | |
f0706e82 | 358 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 359 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
360 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
361 | tmp = skb_queue_len(&local->skb_queue) + | |
362 | skb_queue_len(&local->skb_queue_unreliable); | |
363 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
364 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
365 | dev_kfree_skb_irq(skb); |
366 | tmp--; | |
367 | I802_DEBUG_INC(local->tx_status_drop); | |
368 | } | |
369 | tasklet_schedule(&local->tasklet); | |
370 | } | |
371 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
372 | ||
373 | static void ieee80211_tasklet_handler(unsigned long data) | |
374 | { | |
375 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
376 | struct sk_buff *skb; | |
377 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 378 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
379 | |
380 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
381 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
382 | switch (skb->pkt_type) { | |
383 | case IEEE80211_RX_MSG: | |
384 | /* status is in skb->cb */ | |
385 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 386 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
387 | * netstack. */ |
388 | skb->pkt_type = 0; | |
389 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
390 | break; | |
391 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 392 | skb->pkt_type = 0; |
e039fa4a | 393 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 394 | break; |
eadc8d9e RR |
395 | case IEEE80211_DELBA_MSG: |
396 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
397 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
398 | ra_tid->ra, ra_tid->tid); | |
399 | dev_kfree_skb(skb); | |
400 | break; | |
401 | case IEEE80211_ADDBA_MSG: | |
402 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
403 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
404 | ra_tid->ra, ra_tid->tid); | |
405 | dev_kfree_skb(skb); | |
406 | break ; | |
f4ea83dd JB |
407 | default: |
408 | WARN_ON(1); | |
f0706e82 JB |
409 | dev_kfree_skb(skb); |
410 | break; | |
411 | } | |
412 | } | |
413 | } | |
414 | ||
f0706e82 JB |
415 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
416 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
417 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
d0f09804 | 418 | */ |
f0706e82 JB |
419 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, |
420 | struct ieee80211_key *key, | |
e039fa4a | 421 | struct sk_buff *skb) |
f0706e82 | 422 | { |
62bf1d76 HH |
423 | unsigned int hdrlen, iv_len, mic_len; |
424 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
f0706e82 | 425 | |
62bf1d76 | 426 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
f0706e82 JB |
427 | |
428 | if (!key) | |
429 | goto no_key; | |
430 | ||
8f20fc24 | 431 | switch (key->conf.alg) { |
f0706e82 JB |
432 | case ALG_WEP: |
433 | iv_len = WEP_IV_LEN; | |
434 | mic_len = WEP_ICV_LEN; | |
435 | break; | |
436 | case ALG_TKIP: | |
437 | iv_len = TKIP_IV_LEN; | |
438 | mic_len = TKIP_ICV_LEN; | |
439 | break; | |
440 | case ALG_CCMP: | |
441 | iv_len = CCMP_HDR_LEN; | |
442 | mic_len = CCMP_MIC_LEN; | |
443 | break; | |
444 | default: | |
445 | goto no_key; | |
446 | } | |
447 | ||
62bf1d76 | 448 | if (skb->len >= hdrlen + mic_len && |
11a843b7 | 449 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 | 450 | skb_trim(skb, skb->len - mic_len); |
62bf1d76 | 451 | if (skb->len >= hdrlen + iv_len) { |
f0706e82 | 452 | memmove(skb->data + iv_len, skb->data, hdrlen); |
62bf1d76 | 453 | hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len); |
f0706e82 JB |
454 | } |
455 | ||
456 | no_key: | |
62bf1d76 HH |
457 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
458 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
459 | memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, | |
460 | hdrlen - IEEE80211_QOS_CTL_LEN); | |
461 | skb_pull(skb, IEEE80211_QOS_CTL_LEN); | |
f0706e82 JB |
462 | } |
463 | } | |
464 | ||
d46e144b JB |
465 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
466 | struct sta_info *sta, | |
e039fa4a | 467 | struct sk_buff *skb) |
d46e144b | 468 | { |
e039fa4a JB |
469 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
470 | ||
d46e144b JB |
471 | sta->tx_filtered_count++; |
472 | ||
473 | /* | |
474 | * Clear the TX filter mask for this STA when sending the next | |
475 | * packet. If the STA went to power save mode, this will happen | |
f6d97104 | 476 | * when it wakes up for the next time. |
d46e144b | 477 | */ |
07346f81 | 478 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
479 | |
480 | /* | |
481 | * This code races in the following way: | |
482 | * | |
483 | * (1) STA sends frame indicating it will go to sleep and does so | |
484 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
485 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
486 | * (4) we get TX status before having processed the frame and | |
487 | * knowing that the STA has gone to sleep. | |
488 | * | |
489 | * This is actually quite unlikely even when both those events are | |
490 | * processed from interrupts coming in quickly after one another or | |
491 | * even at the same time because we queue both TX status events and | |
492 | * RX frames to be processed by a tasklet and process them in the | |
493 | * same order that they were received or TX status last. Hence, there | |
494 | * is no race as long as the frame RX is processed before the next TX | |
495 | * status, which drivers can ensure, see below. | |
496 | * | |
497 | * Note that this can only happen if the hardware or firmware can | |
498 | * actually add STAs to the filter list, if this is done by the | |
499 | * driver in response to set_tim() (which will only reduce the race | |
500 | * this whole filtering tries to solve, not completely solve it) | |
501 | * this situation cannot happen. | |
502 | * | |
503 | * To completely solve this race drivers need to make sure that they | |
504 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
505 | * functions and | |
506 | * (b) always process RX events before TX status events if ordering | |
507 | * can be unknown, for example with different interrupt status | |
508 | * bits. | |
509 | */ | |
07346f81 | 510 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 511 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 512 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
513 | skb_queue_tail(&sta->tx_filtered, skb); |
514 | return; | |
515 | } | |
516 | ||
07346f81 | 517 | if (!test_sta_flags(sta, WLAN_STA_PS) && |
e039fa4a | 518 | !(info->flags & IEEE80211_TX_CTL_REQUEUE)) { |
d46e144b | 519 | /* Software retry the packet once */ |
e039fa4a JB |
520 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
521 | ieee80211_remove_tx_extra(local, sta->key, skb); | |
d46e144b JB |
522 | dev_queue_xmit(skb); |
523 | return; | |
524 | } | |
525 | ||
f4ea83dd | 526 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
d46e144b JB |
527 | if (net_ratelimit()) |
528 | printk(KERN_DEBUG "%s: dropped TX filtered frame, " | |
529 | "queue_len=%d PS=%d @%lu\n", | |
530 | wiphy_name(local->hw.wiphy), | |
531 | skb_queue_len(&sta->tx_filtered), | |
07346f81 | 532 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
f4ea83dd | 533 | #endif |
d46e144b JB |
534 | dev_kfree_skb(skb); |
535 | } | |
536 | ||
e039fa4a | 537 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
538 | { |
539 | struct sk_buff *skb2; | |
540 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
541 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 542 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 543 | u16 frag, type; |
429a3805 | 544 | __le16 fc; |
4b7679a5 | 545 | struct ieee80211_supported_band *sband; |
b306f453 JB |
546 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
547 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 548 | struct net_device *prev_dev = NULL; |
429a3805 | 549 | struct sta_info *sta; |
f0706e82 | 550 | |
d0709a65 JB |
551 | rcu_read_lock(); |
552 | ||
95dac040 JB |
553 | sta = sta_info_get(local, hdr->addr1); |
554 | ||
555 | if (sta) { | |
556 | if (info->status.excessive_retries && | |
557 | test_sta_flags(sta, WLAN_STA_PS)) { | |
558 | /* | |
559 | * The STA is in power save mode, so assume | |
560 | * that this TX packet failed because of that. | |
561 | */ | |
562 | ieee80211_handle_filtered_frame(local, sta, skb); | |
563 | rcu_read_unlock(); | |
564 | return; | |
f0706e82 | 565 | } |
f0706e82 | 566 | |
95dac040 JB |
567 | fc = hdr->frame_control; |
568 | ||
569 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && | |
570 | (ieee80211_is_data_qos(fc))) { | |
571 | u16 tid, ssn; | |
572 | u8 *qc; | |
429a3805 | 573 | |
429a3805 RR |
574 | qc = ieee80211_get_qos_ctl(hdr); |
575 | tid = qc[0] & 0xf; | |
576 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
577 | & IEEE80211_SCTL_SEQ); | |
f698d856 | 578 | ieee80211_send_bar(sta->sdata, hdr->addr1, |
429a3805 RR |
579 | tid, ssn); |
580 | } | |
429a3805 | 581 | |
95dac040 | 582 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
e039fa4a | 583 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 584 | rcu_read_unlock(); |
f0706e82 | 585 | return; |
95dac040 JB |
586 | } else { |
587 | if (info->status.excessive_retries) | |
588 | sta->tx_retry_failed++; | |
589 | sta->tx_retry_count += info->status.retry_count; | |
f0706e82 | 590 | } |
95dac040 | 591 | |
4b7679a5 JB |
592 | sband = local->hw.wiphy->bands[info->band]; |
593 | rate_control_tx_status(local, sband, sta, skb); | |
95dac040 | 594 | } |
f0706e82 | 595 | |
d0709a65 JB |
596 | rcu_read_unlock(); |
597 | ||
f0706e82 JB |
598 | ieee80211_led_tx(local, 0); |
599 | ||
600 | /* SNMP counters | |
601 | * Fragments are passed to low-level drivers as separate skbs, so these | |
602 | * are actually fragments, not frames. Update frame counters only for | |
603 | * the first fragment of the frame. */ | |
604 | ||
605 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
606 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
607 | ||
e039fa4a | 608 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
609 | if (frag == 0) { |
610 | local->dot11TransmittedFrameCount++; | |
611 | if (is_multicast_ether_addr(hdr->addr1)) | |
612 | local->dot11MulticastTransmittedFrameCount++; | |
e039fa4a | 613 | if (info->status.retry_count > 0) |
f0706e82 | 614 | local->dot11RetryCount++; |
e039fa4a | 615 | if (info->status.retry_count > 1) |
f0706e82 JB |
616 | local->dot11MultipleRetryCount++; |
617 | } | |
618 | ||
619 | /* This counter shall be incremented for an acknowledged MPDU | |
620 | * with an individual address in the address 1 field or an MPDU | |
621 | * with a multicast address in the address 1 field of type Data | |
622 | * or Management. */ | |
623 | if (!is_multicast_ether_addr(hdr->addr1) || | |
624 | type == IEEE80211_FTYPE_DATA || | |
625 | type == IEEE80211_FTYPE_MGMT) | |
626 | local->dot11TransmittedFragmentCount++; | |
627 | } else { | |
628 | if (frag == 0) | |
629 | local->dot11FailedCount++; | |
630 | } | |
631 | ||
b306f453 JB |
632 | /* this was a transmitted frame, but now we want to reuse it */ |
633 | skb_orphan(skb); | |
634 | ||
3d30d949 MW |
635 | /* |
636 | * This is a bit racy but we can avoid a lot of work | |
637 | * with this test... | |
638 | */ | |
639 | if (!local->monitors && !local->cooked_mntrs) { | |
f0706e82 JB |
640 | dev_kfree_skb(skb); |
641 | return; | |
642 | } | |
643 | ||
b306f453 | 644 | /* send frame to monitor interfaces now */ |
f0706e82 | 645 | |
b306f453 JB |
646 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
647 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
648 | dev_kfree_skb(skb); |
649 | return; | |
650 | } | |
f0706e82 | 651 | |
988c0f72 | 652 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
653 | skb_push(skb, sizeof(*rthdr)); |
654 | ||
655 | memset(rthdr, 0, sizeof(*rthdr)); | |
656 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
657 | rthdr->hdr.it_present = | |
658 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
659 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
660 | ||
e039fa4a | 661 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
662 | !is_multicast_ether_addr(hdr->addr1)) |
663 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
664 | ||
e039fa4a JB |
665 | if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) && |
666 | (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) | |
b306f453 | 667 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e039fa4a | 668 | else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) |
b306f453 JB |
669 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
670 | ||
e039fa4a | 671 | rthdr->data_retries = info->status.retry_count; |
b306f453 | 672 | |
3d30d949 MW |
673 | /* XXX: is this sufficient for BPF? */ |
674 | skb_set_mac_header(skb, 0); | |
675 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
676 | skb->pkt_type = PACKET_OTHERHOST; | |
677 | skb->protocol = htons(ETH_P_802_2); | |
678 | memset(skb->cb, 0, sizeof(skb->cb)); | |
679 | ||
79010420 | 680 | rcu_read_lock(); |
79010420 | 681 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
05c914fe | 682 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
b306f453 JB |
683 | if (!netif_running(sdata->dev)) |
684 | continue; | |
3d30d949 MW |
685 | |
686 | if (prev_dev) { | |
79010420 | 687 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
688 | if (skb2) { |
689 | skb2->dev = prev_dev; | |
690 | netif_rx(skb2); | |
691 | } | |
692 | } | |
693 | ||
694 | prev_dev = sdata->dev; | |
b306f453 JB |
695 | } |
696 | } | |
3d30d949 MW |
697 | if (prev_dev) { |
698 | skb->dev = prev_dev; | |
699 | netif_rx(skb); | |
700 | skb = NULL; | |
701 | } | |
79010420 | 702 | rcu_read_unlock(); |
3d30d949 | 703 | dev_kfree_skb(skb); |
f0706e82 JB |
704 | } |
705 | EXPORT_SYMBOL(ieee80211_tx_status); | |
706 | ||
f0706e82 JB |
707 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
708 | const struct ieee80211_ops *ops) | |
709 | { | |
f0706e82 | 710 | struct ieee80211_local *local; |
f0706e82 JB |
711 | int priv_size; |
712 | struct wiphy *wiphy; | |
713 | ||
714 | /* Ensure 32-byte alignment of our private data and hw private data. | |
715 | * We use the wiphy priv data for both our ieee80211_local and for | |
716 | * the driver's private data | |
717 | * | |
718 | * In memory it'll be like this: | |
719 | * | |
720 | * +-------------------------+ | |
721 | * | struct wiphy | | |
722 | * +-------------------------+ | |
723 | * | struct ieee80211_local | | |
724 | * +-------------------------+ | |
725 | * | driver's private data | | |
726 | * +-------------------------+ | |
727 | * | |
728 | */ | |
729 | priv_size = ((sizeof(struct ieee80211_local) + | |
730 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
731 | priv_data_len; | |
732 | ||
733 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
734 | ||
735 | if (!wiphy) | |
736 | return NULL; | |
737 | ||
738 | wiphy->privid = mac80211_wiphy_privid; | |
739 | ||
740 | local = wiphy_priv(wiphy); | |
741 | local->hw.wiphy = wiphy; | |
742 | ||
743 | local->hw.priv = (char *)local + | |
744 | ((sizeof(struct ieee80211_local) + | |
745 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
746 | ||
4480f15c | 747 | BUG_ON(!ops->tx); |
4150c572 JB |
748 | BUG_ON(!ops->start); |
749 | BUG_ON(!ops->stop); | |
4480f15c JB |
750 | BUG_ON(!ops->config); |
751 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
752 | BUG_ON(!ops->remove_interface); |
753 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
754 | local->ops = ops; |
755 | ||
f0706e82 JB |
756 | local->hw.queues = 1; /* default */ |
757 | ||
f0706e82 JB |
758 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; |
759 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
760 | local->short_retry_limit = 7; | |
761 | local->long_retry_limit = 4; | |
762 | local->hw.conf.radio_enabled = 1; | |
f0706e82 | 763 | |
79010420 | 764 | INIT_LIST_HEAD(&local->interfaces); |
f0706e82 | 765 | |
b16bd15c JB |
766 | spin_lock_init(&local->key_lock); |
767 | ||
c2b13452 | 768 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
f0706e82 JB |
769 | |
770 | sta_info_init(local); | |
771 | ||
f0706e82 JB |
772 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
773 | (unsigned long)local); | |
774 | tasklet_disable(&local->tx_pending_tasklet); | |
775 | ||
776 | tasklet_init(&local->tasklet, | |
777 | ieee80211_tasklet_handler, | |
778 | (unsigned long) local); | |
779 | tasklet_disable(&local->tasklet); | |
780 | ||
781 | skb_queue_head_init(&local->skb_queue); | |
782 | skb_queue_head_init(&local->skb_queue_unreliable); | |
783 | ||
784 | return local_to_hw(local); | |
785 | } | |
786 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
787 | ||
788 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
789 | { | |
790 | struct ieee80211_local *local = hw_to_local(hw); | |
791 | const char *name; | |
792 | int result; | |
8318d78a | 793 | enum ieee80211_band band; |
96d51056 | 794 | struct net_device *mdev; |
133b8226 | 795 | struct ieee80211_master_priv *mpriv; |
8318d78a JB |
796 | |
797 | /* | |
798 | * generic code guarantees at least one band, | |
799 | * set this very early because much code assumes | |
800 | * that hw.conf.channel is assigned | |
801 | */ | |
802 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
803 | struct ieee80211_supported_band *sband; | |
804 | ||
805 | sband = local->hw.wiphy->bands[band]; | |
806 | if (sband) { | |
807 | /* init channel we're on */ | |
808 | local->hw.conf.channel = | |
809 | local->oper_channel = | |
810 | local->scan_channel = &sband->channels[0]; | |
811 | break; | |
812 | } | |
813 | } | |
f0706e82 | 814 | |
f59ac048 LR |
815 | /* if low-level driver supports AP, we also support VLAN */ |
816 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) | |
817 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
818 | ||
819 | /* mac80211 always supports monitor */ | |
820 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); | |
821 | ||
f0706e82 JB |
822 | result = wiphy_register(local->hw.wiphy); |
823 | if (result < 0) | |
824 | return result; | |
825 | ||
e2530083 JB |
826 | /* |
827 | * We use the number of queues for feature tests (QoS, HT) internally | |
828 | * so restrict them appropriately. | |
829 | */ | |
e2530083 JB |
830 | if (hw->queues > IEEE80211_MAX_QUEUES) |
831 | hw->queues = IEEE80211_MAX_QUEUES; | |
832 | if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) | |
833 | hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; | |
834 | if (hw->queues < 4) | |
835 | hw->ampdu_queues = 0; | |
e2530083 | 836 | |
133b8226 | 837 | mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv), |
e2530083 JB |
838 | "wmaster%d", ether_setup, |
839 | ieee80211_num_queues(hw)); | |
96d51056 JB |
840 | if (!mdev) |
841 | goto fail_mdev_alloc; | |
842 | ||
133b8226 JB |
843 | mpriv = netdev_priv(mdev); |
844 | mpriv->local = local; | |
96d51056 JB |
845 | local->mdev = mdev; |
846 | ||
3e122be0 | 847 | ieee80211_rx_bss_list_init(local); |
96d51056 JB |
848 | |
849 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
850 | mdev->open = ieee80211_master_open; | |
851 | mdev->stop = ieee80211_master_stop; | |
852 | mdev->type = ARPHRD_IEEE80211; | |
853 | mdev->header_ops = &ieee80211_header_ops; | |
854 | mdev->set_multicast_list = ieee80211_master_set_multicast_list; | |
855 | ||
f0706e82 | 856 | name = wiphy_dev(local->hw.wiphy)->driver->name; |
59959a61 | 857 | local->hw.workqueue = create_freezeable_workqueue(name); |
f0706e82 JB |
858 | if (!local->hw.workqueue) { |
859 | result = -ENOMEM; | |
860 | goto fail_workqueue; | |
861 | } | |
862 | ||
b306f453 JB |
863 | /* |
864 | * The hardware needs headroom for sending the frame, | |
865 | * and we need some headroom for passing the frame to monitor | |
866 | * interfaces, but never both at the same time. | |
867 | */ | |
33ccad35 JB |
868 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
869 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 870 | |
e9f207f0 JB |
871 | debugfs_hw_add(local); |
872 | ||
dc0ae30c TW |
873 | if (local->hw.conf.beacon_int < 10) |
874 | local->hw.conf.beacon_int = 100; | |
f0706e82 | 875 | |
ea95bba4 TW |
876 | if (local->hw.max_listen_interval == 0) |
877 | local->hw.max_listen_interval = 1; | |
878 | ||
879 | local->hw.conf.listen_interval = local->hw.max_listen_interval; | |
880 | ||
566bfe5a BR |
881 | local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | |
882 | IEEE80211_HW_SIGNAL_DB | | |
883 | IEEE80211_HW_SIGNAL_DBM) ? | |
f0706e82 | 884 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; |
566bfe5a | 885 | local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? |
f0706e82 | 886 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; |
566bfe5a | 887 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
f0706e82 JB |
888 | local->wstats_flags |= IW_QUAL_DBM; |
889 | ||
890 | result = sta_info_start(local); | |
891 | if (result < 0) | |
892 | goto fail_sta_info; | |
893 | ||
894 | rtnl_lock(); | |
895 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
896 | if (result < 0) | |
897 | goto fail_dev; | |
898 | ||
899 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
900 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
901 | ||
902 | result = register_netdevice(local->mdev); | |
903 | if (result < 0) | |
904 | goto fail_dev; | |
905 | ||
830f9038 JB |
906 | result = ieee80211_init_rate_ctrl_alg(local, |
907 | hw->rate_control_algorithm); | |
f0706e82 JB |
908 | if (result < 0) { |
909 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 910 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
911 | goto fail_rate; |
912 | } | |
913 | ||
914 | result = ieee80211_wep_init(local); | |
915 | ||
916 | if (result < 0) { | |
023a04be JF |
917 | printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", |
918 | wiphy_name(local->hw.wiphy), result); | |
f0706e82 JB |
919 | goto fail_wep; |
920 | } | |
921 | ||
51cb6db0 | 922 | local->mdev->select_queue = ieee80211_select_queue; |
f0706e82 JB |
923 | |
924 | /* add one default STA interface */ | |
3e122be0 | 925 | result = ieee80211_if_add(local, "wlan%d", NULL, |
05c914fe | 926 | NL80211_IFTYPE_STATION, NULL); |
f0706e82 JB |
927 | if (result) |
928 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
dd1cd4c6 | 929 | wiphy_name(local->hw.wiphy)); |
f0706e82 | 930 | |
f0706e82 JB |
931 | rtnl_unlock(); |
932 | ||
933 | ieee80211_led_init(local); | |
934 | ||
935 | return 0; | |
936 | ||
937 | fail_wep: | |
938 | rate_control_deinitialize(local); | |
939 | fail_rate: | |
940 | unregister_netdevice(local->mdev); | |
339a7c41 | 941 | local->mdev = NULL; |
f0706e82 JB |
942 | fail_dev: |
943 | rtnl_unlock(); | |
944 | sta_info_stop(local); | |
945 | fail_sta_info: | |
e9f207f0 | 946 | debugfs_hw_del(local); |
f0706e82 JB |
947 | destroy_workqueue(local->hw.workqueue); |
948 | fail_workqueue: | |
3e122be0 JB |
949 | if (local->mdev) |
950 | free_netdev(local->mdev); | |
96d51056 | 951 | fail_mdev_alloc: |
f0706e82 JB |
952 | wiphy_unregister(local->hw.wiphy); |
953 | return result; | |
954 | } | |
955 | EXPORT_SYMBOL(ieee80211_register_hw); | |
956 | ||
f0706e82 JB |
957 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
958 | { | |
959 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 JB |
960 | |
961 | tasklet_kill(&local->tx_pending_tasklet); | |
962 | tasklet_kill(&local->tasklet); | |
963 | ||
964 | rtnl_lock(); | |
965 | ||
79010420 JB |
966 | /* |
967 | * At this point, interface list manipulations are fine | |
968 | * because the driver cannot be handing us frames any | |
969 | * more and the tasklet is killed. | |
970 | */ | |
5b2812e9 | 971 | |
75636525 JB |
972 | /* First, we remove all virtual interfaces. */ |
973 | ieee80211_remove_interfaces(local); | |
5b2812e9 JB |
974 | |
975 | /* then, finally, remove the master interface */ | |
3e122be0 | 976 | unregister_netdevice(local->mdev); |
f0706e82 JB |
977 | |
978 | rtnl_unlock(); | |
979 | ||
3e122be0 | 980 | ieee80211_rx_bss_list_deinit(local); |
f0706e82 JB |
981 | ieee80211_clear_tx_pending(local); |
982 | sta_info_stop(local); | |
983 | rate_control_deinitialize(local); | |
e9f207f0 | 984 | debugfs_hw_del(local); |
f0706e82 | 985 | |
f0706e82 JB |
986 | if (skb_queue_len(&local->skb_queue) |
987 | || skb_queue_len(&local->skb_queue_unreliable)) | |
988 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 989 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
990 | skb_queue_purge(&local->skb_queue); |
991 | skb_queue_purge(&local->skb_queue_unreliable); | |
992 | ||
993 | destroy_workqueue(local->hw.workqueue); | |
994 | wiphy_unregister(local->hw.wiphy); | |
995 | ieee80211_wep_free(local); | |
996 | ieee80211_led_exit(local); | |
3e122be0 | 997 | free_netdev(local->mdev); |
f0706e82 JB |
998 | } |
999 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1000 | ||
1001 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1002 | { | |
1003 | struct ieee80211_local *local = hw_to_local(hw); | |
1004 | ||
f0706e82 JB |
1005 | wiphy_free(local->hw.wiphy); |
1006 | } | |
1007 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1008 | ||
f0706e82 JB |
1009 | static int __init ieee80211_init(void) |
1010 | { | |
1011 | struct sk_buff *skb; | |
1012 | int ret; | |
1013 | ||
e039fa4a JB |
1014 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1015 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
c6a1fa12 | 1016 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); |
f0706e82 | 1017 | |
cccf129f FF |
1018 | ret = rc80211_minstrel_init(); |
1019 | if (ret) | |
1020 | return ret; | |
1021 | ||
4b475898 | 1022 | ret = rc80211_pid_init(); |
ad018375 | 1023 | if (ret) |
51cb6db0 | 1024 | return ret; |
f0706e82 | 1025 | |
e9f207f0 JB |
1026 | ieee80211_debugfs_netdev_init(); |
1027 | ||
f0706e82 JB |
1028 | return 0; |
1029 | } | |
1030 | ||
f0706e82 JB |
1031 | static void __exit ieee80211_exit(void) |
1032 | { | |
4b475898 | 1033 | rc80211_pid_exit(); |
cccf129f | 1034 | rc80211_minstrel_exit(); |
ac71c691 | 1035 | |
3b96766f JB |
1036 | /* |
1037 | * For key todo, it'll be empty by now but the work | |
1038 | * might still be scheduled. | |
1039 | */ | |
1040 | flush_scheduled_work(); | |
1041 | ||
f7a92144 LCC |
1042 | if (mesh_allocated) |
1043 | ieee80211s_stop(); | |
902acc78 | 1044 | |
e9f207f0 | 1045 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1046 | } |
1047 | ||
1048 | ||
ca9938fe | 1049 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1050 | module_exit(ieee80211_exit); |
1051 | ||
1052 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1053 | MODULE_LICENSE("GPL"); |