Commit | Line | Data |
---|---|---|
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 | { | |
109 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
110 | struct ieee80211_sub_if_data *sdata; | |
111 | int res = -EOPNOTSUPP; | |
f0706e82 | 112 | |
79010420 JB |
113 | /* we hold the RTNL here so can safely walk the list */ |
114 | list_for_each_entry(sdata, &local->interfaces, list) { | |
3e122be0 | 115 | if (netif_running(sdata->dev)) { |
b2c258fb JB |
116 | res = 0; |
117 | break; | |
118 | } | |
119 | } | |
36d6825b JB |
120 | |
121 | if (res) | |
122 | return res; | |
123 | ||
51cb6db0 | 124 | netif_tx_start_all_queues(local->mdev); |
36d6825b JB |
125 | |
126 | return 0; | |
b2c258fb | 127 | } |
f0706e82 | 128 | |
b2c258fb | 129 | static int ieee80211_master_stop(struct net_device *dev) |
f0706e82 | 130 | { |
b2c258fb JB |
131 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
132 | struct ieee80211_sub_if_data *sdata; | |
f0706e82 | 133 | |
79010420 JB |
134 | /* we hold the RTNL here so can safely walk the list */ |
135 | list_for_each_entry(sdata, &local->interfaces, list) | |
3e122be0 | 136 | if (netif_running(sdata->dev)) |
b2c258fb | 137 | dev_close(sdata->dev); |
f0706e82 | 138 | |
b2c258fb JB |
139 | return 0; |
140 | } | |
f0706e82 | 141 | |
4150c572 JB |
142 | static void ieee80211_master_set_multicast_list(struct net_device *dev) |
143 | { | |
144 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
145 | ||
146 | ieee80211_configure_filter(local); | |
147 | } | |
148 | ||
b2c258fb JB |
149 | /* everything else */ |
150 | ||
9d139c81 | 151 | int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) |
b2c258fb | 152 | { |
9d139c81 | 153 | struct ieee80211_local *local = sdata->local; |
b2c258fb | 154 | struct ieee80211_if_conf conf; |
b2c258fb | 155 | |
9d139c81 JB |
156 | if (WARN_ON(!netif_running(sdata->dev))) |
157 | return 0; | |
158 | ||
159 | if (!local->ops->config_interface) | |
f0706e82 | 160 | return 0; |
f0706e82 | 161 | |
b2c258fb | 162 | memset(&conf, 0, sizeof(conf)); |
9d139c81 JB |
163 | conf.changed = changed; |
164 | ||
05c914fe JB |
165 | if (sdata->vif.type == NL80211_IFTYPE_STATION || |
166 | sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
4150c572 | 167 | conf.bssid = sdata->u.sta.bssid; |
b2c258fb JB |
168 | conf.ssid = sdata->u.sta.ssid; |
169 | conf.ssid_len = sdata->u.sta.ssid_len; | |
05c914fe | 170 | } else if (sdata->vif.type == NL80211_IFTYPE_AP) { |
9d139c81 | 171 | conf.bssid = sdata->dev->dev_addr; |
b2c258fb JB |
172 | conf.ssid = sdata->u.ap.ssid; |
173 | conf.ssid_len = sdata->u.ap.ssid_len; | |
9d139c81 JB |
174 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
175 | u8 zero[ETH_ALEN] = { 0 }; | |
176 | conf.bssid = zero; | |
177 | conf.ssid = zero; | |
178 | conf.ssid_len = 0; | |
179 | } else { | |
180 | WARN_ON(1); | |
181 | return -EINVAL; | |
f0706e82 | 182 | } |
f0706e82 | 183 | |
9d139c81 JB |
184 | if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID))) |
185 | return -EINVAL; | |
f0706e82 | 186 | |
9d139c81 JB |
187 | if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID))) |
188 | return -EINVAL; | |
f0706e82 | 189 | |
9d139c81 JB |
190 | return local->ops->config_interface(local_to_hw(local), |
191 | &sdata->vif, &conf); | |
b2c258fb | 192 | } |
f0706e82 | 193 | |
b2c258fb JB |
194 | int ieee80211_hw_config(struct ieee80211_local *local) |
195 | { | |
b2c258fb JB |
196 | struct ieee80211_channel *chan; |
197 | int ret = 0; | |
f0706e82 | 198 | |
c2b13452 | 199 | if (local->sw_scanning) |
b2c258fb | 200 | chan = local->scan_channel; |
8318d78a | 201 | else |
b2c258fb | 202 | chan = local->oper_channel; |
f0706e82 | 203 | |
8318d78a JB |
204 | local->hw.conf.channel = chan; |
205 | ||
206 | if (!local->hw.conf.power_level) | |
207 | local->hw.conf.power_level = chan->max_power; | |
208 | else | |
209 | local->hw.conf.power_level = min(chan->max_power, | |
210 | local->hw.conf.power_level); | |
211 | ||
212 | local->hw.conf.max_antenna_gain = chan->max_antenna_gain; | |
f0706e82 | 213 | |
b2c258fb | 214 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
8318d78a JB |
215 | printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n", |
216 | wiphy_name(local->hw.wiphy), chan->center_freq); | |
217 | #endif | |
b2c258fb | 218 | |
f7c4daed | 219 | if (local->open_count) |
b2c258fb | 220 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); |
f0706e82 | 221 | |
b2c258fb JB |
222 | return ret; |
223 | } | |
f0706e82 | 224 | |
d3c990fb | 225 | /** |
38668c05 TW |
226 | * ieee80211_handle_ht should be used only after legacy configuration |
227 | * has been determined namely band, as ht configuration depends upon | |
228 | * the hardware's HT abilities for a _specific_ band. | |
d3c990fb | 229 | */ |
38668c05 | 230 | u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht, |
d3c990fb RR |
231 | struct ieee80211_ht_info *req_ht_cap, |
232 | struct ieee80211_ht_bss_info *req_bss_cap) | |
233 | { | |
234 | struct ieee80211_conf *conf = &local->hw.conf; | |
8318d78a | 235 | struct ieee80211_supported_band *sband; |
38668c05 TW |
236 | struct ieee80211_ht_info ht_conf; |
237 | struct ieee80211_ht_bss_info ht_bss_conf; | |
38668c05 | 238 | u32 changed = 0; |
edcdf8b2 RR |
239 | int i; |
240 | u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS; | |
241 | u8 tx_mcs_set_cap; | |
d3c990fb | 242 | |
8318d78a JB |
243 | sband = local->hw.wiphy->bands[conf->channel->band]; |
244 | ||
edcdf8b2 RR |
245 | memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info)); |
246 | memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info)); | |
247 | ||
d3c990fb | 248 | /* HT is not supported */ |
8318d78a | 249 | if (!sband->ht_info.ht_supported) { |
d3c990fb | 250 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
edcdf8b2 | 251 | goto out; |
d3c990fb RR |
252 | } |
253 | ||
edcdf8b2 RR |
254 | /* disable HT */ |
255 | if (!enable_ht) { | |
256 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) | |
38668c05 | 257 | changed |= BSS_CHANGED_HT; |
edcdf8b2 RR |
258 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; |
259 | conf->ht_conf.ht_supported = 0; | |
260 | goto out; | |
261 | } | |
38668c05 | 262 | |
38668c05 | 263 | |
edcdf8b2 RR |
264 | if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) |
265 | changed |= BSS_CHANGED_HT; | |
38668c05 | 266 | |
edcdf8b2 RR |
267 | conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; |
268 | ht_conf.ht_supported = 1; | |
38668c05 | 269 | |
edcdf8b2 | 270 | ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap; |
00c5ae2f TW |
271 | ht_conf.cap &= ~(IEEE80211_HT_CAP_SM_PS); |
272 | ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_SM_PS; | |
edcdf8b2 RR |
273 | ht_bss_conf.primary_channel = req_bss_cap->primary_channel; |
274 | ht_bss_conf.bss_cap = req_bss_cap->bss_cap; | |
275 | ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; | |
38668c05 | 276 | |
edcdf8b2 RR |
277 | ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; |
278 | ht_conf.ampdu_density = req_ht_cap->ampdu_density; | |
38668c05 | 279 | |
edcdf8b2 RR |
280 | /* Bits 96-100 */ |
281 | tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12]; | |
282 | ||
283 | /* configure suppoerted Tx MCS according to requested MCS | |
284 | * (based in most cases on Rx capabilities of peer) and self | |
285 | * Tx MCS capabilities (as defined by low level driver HW | |
286 | * Tx capabilities) */ | |
287 | if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED)) | |
288 | goto check_changed; | |
d3c990fb | 289 | |
edcdf8b2 RR |
290 | /* Counting from 0 therfore + 1 */ |
291 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF) | |
292 | max_tx_streams = ((tx_mcs_set_cap & | |
293 | IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1; | |
294 | ||
295 | for (i = 0; i < max_tx_streams; i++) | |
296 | ht_conf.supp_mcs_set[i] = | |
297 | sband->ht_info.supp_mcs_set[i] & | |
298 | req_ht_cap->supp_mcs_set[i]; | |
299 | ||
300 | if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM) | |
301 | for (i = IEEE80211_SUPP_MCS_SET_UEQM; | |
302 | i < IEEE80211_SUPP_MCS_SET_LEN; i++) | |
303 | ht_conf.supp_mcs_set[i] = | |
304 | sband->ht_info.supp_mcs_set[i] & | |
305 | req_ht_cap->supp_mcs_set[i]; | |
306 | ||
307 | check_changed: | |
308 | /* if bss configuration changed store the new one */ | |
309 | if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) || | |
310 | memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) { | |
311 | changed |= BSS_CHANGED_HT; | |
312 | memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf)); | |
313 | memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf)); | |
314 | } | |
315 | out: | |
38668c05 | 316 | return changed; |
d3c990fb RR |
317 | } |
318 | ||
471b3efd JB |
319 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
320 | u32 changed) | |
d9430a32 | 321 | { |
471b3efd JB |
322 | struct ieee80211_local *local = sdata->local; |
323 | ||
324 | if (!changed) | |
325 | return; | |
326 | ||
327 | if (local->ops->bss_info_changed) | |
328 | local->ops->bss_info_changed(local_to_hw(local), | |
329 | &sdata->vif, | |
330 | &sdata->bss_conf, | |
331 | changed); | |
d9430a32 DD |
332 | } |
333 | ||
f698d856 | 334 | u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
d9430a32 | 335 | { |
471b3efd JB |
336 | sdata->bss_conf.use_cts_prot = 0; |
337 | sdata->bss_conf.use_short_preamble = 0; | |
fc32f924 | 338 | return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE; |
d9430a32 DD |
339 | } |
340 | ||
f0706e82 | 341 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 342 | struct sk_buff *skb) |
f0706e82 JB |
343 | { |
344 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 345 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 JB |
346 | int tmp; |
347 | ||
348 | skb->dev = local->mdev; | |
f0706e82 | 349 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
e039fa4a | 350 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? |
f0706e82 JB |
351 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
352 | tmp = skb_queue_len(&local->skb_queue) + | |
353 | skb_queue_len(&local->skb_queue_unreliable); | |
354 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
355 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
f0706e82 JB |
356 | dev_kfree_skb_irq(skb); |
357 | tmp--; | |
358 | I802_DEBUG_INC(local->tx_status_drop); | |
359 | } | |
360 | tasklet_schedule(&local->tasklet); | |
361 | } | |
362 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
363 | ||
364 | static void ieee80211_tasklet_handler(unsigned long data) | |
365 | { | |
366 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
367 | struct sk_buff *skb; | |
368 | struct ieee80211_rx_status rx_status; | |
eadc8d9e | 369 | struct ieee80211_ra_tid *ra_tid; |
f0706e82 JB |
370 | |
371 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
372 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
373 | switch (skb->pkt_type) { | |
374 | case IEEE80211_RX_MSG: | |
375 | /* status is in skb->cb */ | |
376 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 377 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
378 | * netstack. */ |
379 | skb->pkt_type = 0; | |
380 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
381 | break; | |
382 | case IEEE80211_TX_STATUS_MSG: | |
f0706e82 | 383 | skb->pkt_type = 0; |
e039fa4a | 384 | ieee80211_tx_status(local_to_hw(local), skb); |
f0706e82 | 385 | break; |
eadc8d9e RR |
386 | case IEEE80211_DELBA_MSG: |
387 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
388 | ieee80211_stop_tx_ba_cb(local_to_hw(local), | |
389 | ra_tid->ra, ra_tid->tid); | |
390 | dev_kfree_skb(skb); | |
391 | break; | |
392 | case IEEE80211_ADDBA_MSG: | |
393 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; | |
394 | ieee80211_start_tx_ba_cb(local_to_hw(local), | |
395 | ra_tid->ra, ra_tid->tid); | |
396 | dev_kfree_skb(skb); | |
397 | break ; | |
f4ea83dd JB |
398 | default: |
399 | WARN_ON(1); | |
f0706e82 JB |
400 | dev_kfree_skb(skb); |
401 | break; | |
402 | } | |
403 | } | |
404 | } | |
405 | ||
f0706e82 JB |
406 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
407 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
408 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
d0f09804 | 409 | */ |
f0706e82 JB |
410 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, |
411 | struct ieee80211_key *key, | |
e039fa4a | 412 | struct sk_buff *skb) |
f0706e82 | 413 | { |
62bf1d76 HH |
414 | unsigned int hdrlen, iv_len, mic_len; |
415 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
f0706e82 | 416 | |
62bf1d76 | 417 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
f0706e82 JB |
418 | |
419 | if (!key) | |
420 | goto no_key; | |
421 | ||
8f20fc24 | 422 | switch (key->conf.alg) { |
f0706e82 JB |
423 | case ALG_WEP: |
424 | iv_len = WEP_IV_LEN; | |
425 | mic_len = WEP_ICV_LEN; | |
426 | break; | |
427 | case ALG_TKIP: | |
428 | iv_len = TKIP_IV_LEN; | |
429 | mic_len = TKIP_ICV_LEN; | |
430 | break; | |
431 | case ALG_CCMP: | |
432 | iv_len = CCMP_HDR_LEN; | |
433 | mic_len = CCMP_MIC_LEN; | |
434 | break; | |
435 | default: | |
436 | goto no_key; | |
437 | } | |
438 | ||
62bf1d76 | 439 | if (skb->len >= hdrlen + mic_len && |
11a843b7 | 440 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 | 441 | skb_trim(skb, skb->len - mic_len); |
62bf1d76 | 442 | if (skb->len >= hdrlen + iv_len) { |
f0706e82 | 443 | memmove(skb->data + iv_len, skb->data, hdrlen); |
62bf1d76 | 444 | hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len); |
f0706e82 JB |
445 | } |
446 | ||
447 | no_key: | |
62bf1d76 HH |
448 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
449 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
450 | memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, | |
451 | hdrlen - IEEE80211_QOS_CTL_LEN); | |
452 | skb_pull(skb, IEEE80211_QOS_CTL_LEN); | |
f0706e82 JB |
453 | } |
454 | } | |
455 | ||
d46e144b JB |
456 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, |
457 | struct sta_info *sta, | |
e039fa4a | 458 | struct sk_buff *skb) |
d46e144b | 459 | { |
e039fa4a JB |
460 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
461 | ||
d46e144b JB |
462 | sta->tx_filtered_count++; |
463 | ||
464 | /* | |
465 | * Clear the TX filter mask for this STA when sending the next | |
466 | * packet. If the STA went to power save mode, this will happen | |
f6d97104 | 467 | * when it wakes up for the next time. |
d46e144b | 468 | */ |
07346f81 | 469 | set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT); |
d46e144b JB |
470 | |
471 | /* | |
472 | * This code races in the following way: | |
473 | * | |
474 | * (1) STA sends frame indicating it will go to sleep and does so | |
475 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
476 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
477 | * (4) we get TX status before having processed the frame and | |
478 | * knowing that the STA has gone to sleep. | |
479 | * | |
480 | * This is actually quite unlikely even when both those events are | |
481 | * processed from interrupts coming in quickly after one another or | |
482 | * even at the same time because we queue both TX status events and | |
483 | * RX frames to be processed by a tasklet and process them in the | |
484 | * same order that they were received or TX status last. Hence, there | |
485 | * is no race as long as the frame RX is processed before the next TX | |
486 | * status, which drivers can ensure, see below. | |
487 | * | |
488 | * Note that this can only happen if the hardware or firmware can | |
489 | * actually add STAs to the filter list, if this is done by the | |
490 | * driver in response to set_tim() (which will only reduce the race | |
491 | * this whole filtering tries to solve, not completely solve it) | |
492 | * this situation cannot happen. | |
493 | * | |
494 | * To completely solve this race drivers need to make sure that they | |
495 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
496 | * functions and | |
497 | * (b) always process RX events before TX status events if ordering | |
498 | * can be unknown, for example with different interrupt status | |
499 | * bits. | |
500 | */ | |
07346f81 | 501 | if (test_sta_flags(sta, WLAN_STA_PS) && |
d46e144b | 502 | skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { |
e039fa4a | 503 | ieee80211_remove_tx_extra(local, sta->key, skb); |
d46e144b JB |
504 | skb_queue_tail(&sta->tx_filtered, skb); |
505 | return; | |
506 | } | |
507 | ||
07346f81 | 508 | if (!test_sta_flags(sta, WLAN_STA_PS) && |
e039fa4a | 509 | !(info->flags & IEEE80211_TX_CTL_REQUEUE)) { |
d46e144b | 510 | /* Software retry the packet once */ |
e039fa4a JB |
511 | info->flags |= IEEE80211_TX_CTL_REQUEUE; |
512 | ieee80211_remove_tx_extra(local, sta->key, skb); | |
d46e144b JB |
513 | dev_queue_xmit(skb); |
514 | return; | |
515 | } | |
516 | ||
f4ea83dd | 517 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
d46e144b JB |
518 | if (net_ratelimit()) |
519 | printk(KERN_DEBUG "%s: dropped TX filtered frame, " | |
520 | "queue_len=%d PS=%d @%lu\n", | |
521 | wiphy_name(local->hw.wiphy), | |
522 | skb_queue_len(&sta->tx_filtered), | |
07346f81 | 523 | !!test_sta_flags(sta, WLAN_STA_PS), jiffies); |
f4ea83dd | 524 | #endif |
d46e144b JB |
525 | dev_kfree_skb(skb); |
526 | } | |
527 | ||
e039fa4a | 528 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
f0706e82 JB |
529 | { |
530 | struct sk_buff *skb2; | |
531 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
532 | struct ieee80211_local *local = hw_to_local(hw); | |
e039fa4a | 533 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 534 | u16 frag, type; |
429a3805 | 535 | __le16 fc; |
b306f453 JB |
536 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
537 | struct ieee80211_sub_if_data *sdata; | |
3d30d949 | 538 | struct net_device *prev_dev = NULL; |
429a3805 | 539 | struct sta_info *sta; |
f0706e82 | 540 | |
d0709a65 JB |
541 | rcu_read_lock(); |
542 | ||
e039fa4a | 543 | if (info->status.excessive_retries) { |
f0706e82 JB |
544 | sta = sta_info_get(local, hdr->addr1); |
545 | if (sta) { | |
07346f81 | 546 | if (test_sta_flags(sta, WLAN_STA_PS)) { |
d46e144b JB |
547 | /* |
548 | * The STA is in power save mode, so assume | |
f0706e82 JB |
549 | * that this TX packet failed because of that. |
550 | */ | |
e039fa4a | 551 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 552 | rcu_read_unlock(); |
d46e144b | 553 | return; |
f0706e82 | 554 | } |
f0706e82 JB |
555 | } |
556 | } | |
557 | ||
429a3805 RR |
558 | fc = hdr->frame_control; |
559 | ||
560 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && | |
561 | (ieee80211_is_data_qos(fc))) { | |
562 | u16 tid, ssn; | |
563 | u8 *qc; | |
564 | sta = sta_info_get(local, hdr->addr1); | |
565 | if (sta) { | |
566 | qc = ieee80211_get_qos_ctl(hdr); | |
567 | tid = qc[0] & 0xf; | |
568 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
569 | & IEEE80211_SCTL_SEQ); | |
f698d856 | 570 | ieee80211_send_bar(sta->sdata, hdr->addr1, |
429a3805 RR |
571 | tid, ssn); |
572 | } | |
573 | } | |
574 | ||
e039fa4a | 575 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
f0706e82 JB |
576 | sta = sta_info_get(local, hdr->addr1); |
577 | if (sta) { | |
e039fa4a | 578 | ieee80211_handle_filtered_frame(local, sta, skb); |
d0709a65 | 579 | rcu_read_unlock(); |
f0706e82 JB |
580 | return; |
581 | } | |
1abbe498 | 582 | } else |
e039fa4a | 583 | rate_control_tx_status(local->mdev, skb); |
f0706e82 | 584 | |
d0709a65 JB |
585 | rcu_read_unlock(); |
586 | ||
f0706e82 JB |
587 | ieee80211_led_tx(local, 0); |
588 | ||
589 | /* SNMP counters | |
590 | * Fragments are passed to low-level drivers as separate skbs, so these | |
591 | * are actually fragments, not frames. Update frame counters only for | |
592 | * the first fragment of the frame. */ | |
593 | ||
594 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
595 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
596 | ||
e039fa4a | 597 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
f0706e82 JB |
598 | if (frag == 0) { |
599 | local->dot11TransmittedFrameCount++; | |
600 | if (is_multicast_ether_addr(hdr->addr1)) | |
601 | local->dot11MulticastTransmittedFrameCount++; | |
e039fa4a | 602 | if (info->status.retry_count > 0) |
f0706e82 | 603 | local->dot11RetryCount++; |
e039fa4a | 604 | if (info->status.retry_count > 1) |
f0706e82 JB |
605 | local->dot11MultipleRetryCount++; |
606 | } | |
607 | ||
608 | /* This counter shall be incremented for an acknowledged MPDU | |
609 | * with an individual address in the address 1 field or an MPDU | |
610 | * with a multicast address in the address 1 field of type Data | |
611 | * or Management. */ | |
612 | if (!is_multicast_ether_addr(hdr->addr1) || | |
613 | type == IEEE80211_FTYPE_DATA || | |
614 | type == IEEE80211_FTYPE_MGMT) | |
615 | local->dot11TransmittedFragmentCount++; | |
616 | } else { | |
617 | if (frag == 0) | |
618 | local->dot11FailedCount++; | |
619 | } | |
620 | ||
b306f453 JB |
621 | /* this was a transmitted frame, but now we want to reuse it */ |
622 | skb_orphan(skb); | |
623 | ||
3d30d949 MW |
624 | /* |
625 | * This is a bit racy but we can avoid a lot of work | |
626 | * with this test... | |
627 | */ | |
628 | if (!local->monitors && !local->cooked_mntrs) { | |
f0706e82 JB |
629 | dev_kfree_skb(skb); |
630 | return; | |
631 | } | |
632 | ||
b306f453 | 633 | /* send frame to monitor interfaces now */ |
f0706e82 | 634 | |
b306f453 JB |
635 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
636 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
637 | dev_kfree_skb(skb); |
638 | return; | |
639 | } | |
f0706e82 | 640 | |
988c0f72 | 641 | rthdr = (struct ieee80211_tx_status_rtap_hdr *) |
b306f453 JB |
642 | skb_push(skb, sizeof(*rthdr)); |
643 | ||
644 | memset(rthdr, 0, sizeof(*rthdr)); | |
645 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
646 | rthdr->hdr.it_present = | |
647 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
648 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
649 | ||
e039fa4a | 650 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && |
b306f453 JB |
651 | !is_multicast_ether_addr(hdr->addr1)) |
652 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
653 | ||
e039fa4a JB |
654 | if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) && |
655 | (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) | |
b306f453 | 656 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
e039fa4a | 657 | else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) |
b306f453 JB |
658 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
659 | ||
e039fa4a | 660 | rthdr->data_retries = info->status.retry_count; |
b306f453 | 661 | |
3d30d949 MW |
662 | /* XXX: is this sufficient for BPF? */ |
663 | skb_set_mac_header(skb, 0); | |
664 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
665 | skb->pkt_type = PACKET_OTHERHOST; | |
666 | skb->protocol = htons(ETH_P_802_2); | |
667 | memset(skb->cb, 0, sizeof(skb->cb)); | |
668 | ||
79010420 | 669 | rcu_read_lock(); |
79010420 | 670 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
05c914fe | 671 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { |
b306f453 JB |
672 | if (!netif_running(sdata->dev)) |
673 | continue; | |
3d30d949 MW |
674 | |
675 | if (prev_dev) { | |
79010420 | 676 | skb2 = skb_clone(skb, GFP_ATOMIC); |
3d30d949 MW |
677 | if (skb2) { |
678 | skb2->dev = prev_dev; | |
679 | netif_rx(skb2); | |
680 | } | |
681 | } | |
682 | ||
683 | prev_dev = sdata->dev; | |
b306f453 JB |
684 | } |
685 | } | |
3d30d949 MW |
686 | if (prev_dev) { |
687 | skb->dev = prev_dev; | |
688 | netif_rx(skb); | |
689 | skb = NULL; | |
690 | } | |
79010420 | 691 | rcu_read_unlock(); |
3d30d949 | 692 | dev_kfree_skb(skb); |
f0706e82 JB |
693 | } |
694 | EXPORT_SYMBOL(ieee80211_tx_status); | |
695 | ||
f0706e82 JB |
696 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
697 | const struct ieee80211_ops *ops) | |
698 | { | |
f0706e82 | 699 | struct ieee80211_local *local; |
f0706e82 JB |
700 | int priv_size; |
701 | struct wiphy *wiphy; | |
702 | ||
703 | /* Ensure 32-byte alignment of our private data and hw private data. | |
704 | * We use the wiphy priv data for both our ieee80211_local and for | |
705 | * the driver's private data | |
706 | * | |
707 | * In memory it'll be like this: | |
708 | * | |
709 | * +-------------------------+ | |
710 | * | struct wiphy | | |
711 | * +-------------------------+ | |
712 | * | struct ieee80211_local | | |
713 | * +-------------------------+ | |
714 | * | driver's private data | | |
715 | * +-------------------------+ | |
716 | * | |
717 | */ | |
718 | priv_size = ((sizeof(struct ieee80211_local) + | |
719 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
720 | priv_data_len; | |
721 | ||
722 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
723 | ||
724 | if (!wiphy) | |
725 | return NULL; | |
726 | ||
727 | wiphy->privid = mac80211_wiphy_privid; | |
728 | ||
729 | local = wiphy_priv(wiphy); | |
730 | local->hw.wiphy = wiphy; | |
731 | ||
732 | local->hw.priv = (char *)local + | |
733 | ((sizeof(struct ieee80211_local) + | |
734 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
735 | ||
4480f15c | 736 | BUG_ON(!ops->tx); |
4150c572 JB |
737 | BUG_ON(!ops->start); |
738 | BUG_ON(!ops->stop); | |
4480f15c JB |
739 | BUG_ON(!ops->config); |
740 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
741 | BUG_ON(!ops->remove_interface); |
742 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
743 | local->ops = ops; |
744 | ||
f0706e82 JB |
745 | local->hw.queues = 1; /* default */ |
746 | ||
f0706e82 JB |
747 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; |
748 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
749 | local->short_retry_limit = 7; | |
750 | local->long_retry_limit = 4; | |
751 | local->hw.conf.radio_enabled = 1; | |
f0706e82 | 752 | |
79010420 | 753 | INIT_LIST_HEAD(&local->interfaces); |
f0706e82 | 754 | |
b16bd15c JB |
755 | spin_lock_init(&local->key_lock); |
756 | ||
c2b13452 | 757 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); |
f0706e82 JB |
758 | |
759 | sta_info_init(local); | |
760 | ||
f0706e82 JB |
761 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
762 | (unsigned long)local); | |
763 | tasklet_disable(&local->tx_pending_tasklet); | |
764 | ||
765 | tasklet_init(&local->tasklet, | |
766 | ieee80211_tasklet_handler, | |
767 | (unsigned long) local); | |
768 | tasklet_disable(&local->tasklet); | |
769 | ||
770 | skb_queue_head_init(&local->skb_queue); | |
771 | skb_queue_head_init(&local->skb_queue_unreliable); | |
772 | ||
773 | return local_to_hw(local); | |
774 | } | |
775 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
776 | ||
777 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
778 | { | |
779 | struct ieee80211_local *local = hw_to_local(hw); | |
780 | const char *name; | |
781 | int result; | |
8318d78a | 782 | enum ieee80211_band band; |
96d51056 | 783 | struct net_device *mdev; |
3e122be0 | 784 | struct wireless_dev *mwdev; |
8318d78a JB |
785 | |
786 | /* | |
787 | * generic code guarantees at least one band, | |
788 | * set this very early because much code assumes | |
789 | * that hw.conf.channel is assigned | |
790 | */ | |
791 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
792 | struct ieee80211_supported_band *sband; | |
793 | ||
794 | sband = local->hw.wiphy->bands[band]; | |
795 | if (sband) { | |
796 | /* init channel we're on */ | |
797 | local->hw.conf.channel = | |
798 | local->oper_channel = | |
799 | local->scan_channel = &sband->channels[0]; | |
800 | break; | |
801 | } | |
802 | } | |
f0706e82 | 803 | |
f59ac048 LR |
804 | /* if low-level driver supports AP, we also support VLAN */ |
805 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) | |
806 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); | |
807 | ||
808 | /* mac80211 always supports monitor */ | |
809 | local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); | |
810 | ||
f0706e82 JB |
811 | result = wiphy_register(local->hw.wiphy); |
812 | if (result < 0) | |
813 | return result; | |
814 | ||
e2530083 JB |
815 | /* |
816 | * We use the number of queues for feature tests (QoS, HT) internally | |
817 | * so restrict them appropriately. | |
818 | */ | |
e2530083 JB |
819 | if (hw->queues > IEEE80211_MAX_QUEUES) |
820 | hw->queues = IEEE80211_MAX_QUEUES; | |
821 | if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES) | |
822 | hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES; | |
823 | if (hw->queues < 4) | |
824 | hw->ampdu_queues = 0; | |
e2530083 | 825 | |
3e122be0 | 826 | mdev = alloc_netdev_mq(sizeof(struct wireless_dev), |
e2530083 JB |
827 | "wmaster%d", ether_setup, |
828 | ieee80211_num_queues(hw)); | |
96d51056 JB |
829 | if (!mdev) |
830 | goto fail_mdev_alloc; | |
831 | ||
3e122be0 JB |
832 | mwdev = netdev_priv(mdev); |
833 | mdev->ieee80211_ptr = mwdev; | |
834 | mwdev->wiphy = local->hw.wiphy; | |
96d51056 JB |
835 | |
836 | local->mdev = mdev; | |
837 | ||
3e122be0 | 838 | ieee80211_rx_bss_list_init(local); |
96d51056 JB |
839 | |
840 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
841 | mdev->open = ieee80211_master_open; | |
842 | mdev->stop = ieee80211_master_stop; | |
843 | mdev->type = ARPHRD_IEEE80211; | |
844 | mdev->header_ops = &ieee80211_header_ops; | |
845 | mdev->set_multicast_list = ieee80211_master_set_multicast_list; | |
846 | ||
f0706e82 | 847 | name = wiphy_dev(local->hw.wiphy)->driver->name; |
59959a61 | 848 | local->hw.workqueue = create_freezeable_workqueue(name); |
f0706e82 JB |
849 | if (!local->hw.workqueue) { |
850 | result = -ENOMEM; | |
851 | goto fail_workqueue; | |
852 | } | |
853 | ||
b306f453 JB |
854 | /* |
855 | * The hardware needs headroom for sending the frame, | |
856 | * and we need some headroom for passing the frame to monitor | |
857 | * interfaces, but never both at the same time. | |
858 | */ | |
33ccad35 JB |
859 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
860 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 861 | |
e9f207f0 JB |
862 | debugfs_hw_add(local); |
863 | ||
dc0ae30c TW |
864 | if (local->hw.conf.beacon_int < 10) |
865 | local->hw.conf.beacon_int = 100; | |
f0706e82 | 866 | |
ea95bba4 TW |
867 | if (local->hw.max_listen_interval == 0) |
868 | local->hw.max_listen_interval = 1; | |
869 | ||
870 | local->hw.conf.listen_interval = local->hw.max_listen_interval; | |
871 | ||
566bfe5a BR |
872 | local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC | |
873 | IEEE80211_HW_SIGNAL_DB | | |
874 | IEEE80211_HW_SIGNAL_DBM) ? | |
f0706e82 | 875 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; |
566bfe5a | 876 | local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ? |
f0706e82 | 877 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; |
566bfe5a | 878 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
f0706e82 JB |
879 | local->wstats_flags |= IW_QUAL_DBM; |
880 | ||
881 | result = sta_info_start(local); | |
882 | if (result < 0) | |
883 | goto fail_sta_info; | |
884 | ||
885 | rtnl_lock(); | |
886 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
887 | if (result < 0) | |
888 | goto fail_dev; | |
889 | ||
890 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
891 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
892 | ||
893 | result = register_netdevice(local->mdev); | |
894 | if (result < 0) | |
895 | goto fail_dev; | |
896 | ||
830f9038 JB |
897 | result = ieee80211_init_rate_ctrl_alg(local, |
898 | hw->rate_control_algorithm); | |
f0706e82 JB |
899 | if (result < 0) { |
900 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 901 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
902 | goto fail_rate; |
903 | } | |
904 | ||
905 | result = ieee80211_wep_init(local); | |
906 | ||
907 | if (result < 0) { | |
023a04be JF |
908 | printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", |
909 | wiphy_name(local->hw.wiphy), result); | |
f0706e82 JB |
910 | goto fail_wep; |
911 | } | |
912 | ||
51cb6db0 | 913 | local->mdev->select_queue = ieee80211_select_queue; |
f0706e82 JB |
914 | |
915 | /* add one default STA interface */ | |
3e122be0 | 916 | result = ieee80211_if_add(local, "wlan%d", NULL, |
05c914fe | 917 | NL80211_IFTYPE_STATION, NULL); |
f0706e82 JB |
918 | if (result) |
919 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
dd1cd4c6 | 920 | wiphy_name(local->hw.wiphy)); |
f0706e82 | 921 | |
f0706e82 JB |
922 | rtnl_unlock(); |
923 | ||
924 | ieee80211_led_init(local); | |
925 | ||
926 | return 0; | |
927 | ||
928 | fail_wep: | |
929 | rate_control_deinitialize(local); | |
930 | fail_rate: | |
931 | unregister_netdevice(local->mdev); | |
339a7c41 | 932 | local->mdev = NULL; |
f0706e82 JB |
933 | fail_dev: |
934 | rtnl_unlock(); | |
935 | sta_info_stop(local); | |
936 | fail_sta_info: | |
e9f207f0 | 937 | debugfs_hw_del(local); |
f0706e82 JB |
938 | destroy_workqueue(local->hw.workqueue); |
939 | fail_workqueue: | |
3e122be0 JB |
940 | if (local->mdev) |
941 | free_netdev(local->mdev); | |
96d51056 | 942 | fail_mdev_alloc: |
f0706e82 JB |
943 | wiphy_unregister(local->hw.wiphy); |
944 | return result; | |
945 | } | |
946 | EXPORT_SYMBOL(ieee80211_register_hw); | |
947 | ||
f0706e82 JB |
948 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
949 | { | |
950 | struct ieee80211_local *local = hw_to_local(hw); | |
f0706e82 JB |
951 | |
952 | tasklet_kill(&local->tx_pending_tasklet); | |
953 | tasklet_kill(&local->tasklet); | |
954 | ||
955 | rtnl_lock(); | |
956 | ||
79010420 JB |
957 | /* |
958 | * At this point, interface list manipulations are fine | |
959 | * because the driver cannot be handing us frames any | |
960 | * more and the tasklet is killed. | |
961 | */ | |
5b2812e9 | 962 | |
75636525 JB |
963 | /* First, we remove all virtual interfaces. */ |
964 | ieee80211_remove_interfaces(local); | |
5b2812e9 JB |
965 | |
966 | /* then, finally, remove the master interface */ | |
3e122be0 | 967 | unregister_netdevice(local->mdev); |
f0706e82 JB |
968 | |
969 | rtnl_unlock(); | |
970 | ||
3e122be0 | 971 | ieee80211_rx_bss_list_deinit(local); |
f0706e82 JB |
972 | ieee80211_clear_tx_pending(local); |
973 | sta_info_stop(local); | |
974 | rate_control_deinitialize(local); | |
e9f207f0 | 975 | debugfs_hw_del(local); |
f0706e82 | 976 | |
f0706e82 JB |
977 | if (skb_queue_len(&local->skb_queue) |
978 | || skb_queue_len(&local->skb_queue_unreliable)) | |
979 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 980 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
981 | skb_queue_purge(&local->skb_queue); |
982 | skb_queue_purge(&local->skb_queue_unreliable); | |
983 | ||
984 | destroy_workqueue(local->hw.workqueue); | |
985 | wiphy_unregister(local->hw.wiphy); | |
986 | ieee80211_wep_free(local); | |
987 | ieee80211_led_exit(local); | |
3e122be0 | 988 | free_netdev(local->mdev); |
f0706e82 JB |
989 | } |
990 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
991 | ||
992 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
993 | { | |
994 | struct ieee80211_local *local = hw_to_local(hw); | |
995 | ||
f0706e82 JB |
996 | wiphy_free(local->hw.wiphy); |
997 | } | |
998 | EXPORT_SYMBOL(ieee80211_free_hw); | |
999 | ||
f0706e82 JB |
1000 | static int __init ieee80211_init(void) |
1001 | { | |
1002 | struct sk_buff *skb; | |
1003 | int ret; | |
1004 | ||
e039fa4a JB |
1005 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1006 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + | |
1007 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); | |
f0706e82 | 1008 | |
4b475898 | 1009 | ret = rc80211_pid_init(); |
ad018375 | 1010 | if (ret) |
51cb6db0 | 1011 | return ret; |
f0706e82 | 1012 | |
e9f207f0 JB |
1013 | ieee80211_debugfs_netdev_init(); |
1014 | ||
f0706e82 JB |
1015 | return 0; |
1016 | } | |
1017 | ||
f0706e82 JB |
1018 | static void __exit ieee80211_exit(void) |
1019 | { | |
4b475898 | 1020 | rc80211_pid_exit(); |
ac71c691 | 1021 | |
3b96766f JB |
1022 | /* |
1023 | * For key todo, it'll be empty by now but the work | |
1024 | * might still be scheduled. | |
1025 | */ | |
1026 | flush_scheduled_work(); | |
1027 | ||
f7a92144 LCC |
1028 | if (mesh_allocated) |
1029 | ieee80211s_stop(); | |
902acc78 | 1030 | |
e9f207f0 | 1031 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1032 | } |
1033 | ||
1034 | ||
ca9938fe | 1035 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1036 | module_exit(ieee80211_exit); |
1037 | ||
1038 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1039 | MODULE_LICENSE("GPL"); |