blob: ae62ad40ad63715bed2372be5344ce3c4e4889bc [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
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>
Jiri Bencf0706e82007-05-05 11:45:53 -070023#include <linux/bitmap.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070024#include <net/net_namespace.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070025#include <net/cfg80211.h>
26
Jiri Bencf0706e82007-05-05 11:45:53 -070027#include "ieee80211_i.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040028#include "rate.h"
Luis Carlos Cobof7a92142008-02-23 15:17:18 +010029#include "mesh.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070030#include "wep.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070031#include "wme.h"
32#include "aes_ccm.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040033#include "led.h"
Michael Wue0eb6852007-09-18 17:29:21 -040034#include "cfg.h"
Jiri Bence9f207f2007-05-05 11:46:38 -070035#include "debugfs.h"
36#include "debugfs_netdev.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070037
Johannes Bergb306f452007-07-10 19:32:08 +020038/*
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
41 */
42struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
44 __le16 tx_flags;
45 u8 data_retries;
46} __attribute__ ((packed));
47
Jiri Bencf0706e82007-05-05 11:45:53 -070048
Johannes Berg4150c572007-09-17 01:29:23 -040049/* must be called under mdev tx lock */
Johannes Berg0d143fe2008-09-11 00:01:59 +020050void ieee80211_configure_filter(struct ieee80211_local *local)
Johannes Berg4150c572007-09-17 01:29:23 -040051{
52 unsigned int changed_flags;
53 unsigned int new_flags = 0;
54
Johannes Berg53918992007-09-26 15:19:47 +020055 if (atomic_read(&local->iff_promiscs))
Johannes Berg4150c572007-09-17 01:29:23 -040056 new_flags |= FIF_PROMISC_IN_BSS;
57
Johannes Berg53918992007-09-26 15:19:47 +020058 if (atomic_read(&local->iff_allmultis))
Johannes Berg4150c572007-09-17 01:29:23 -040059 new_flags |= FIF_ALLMULTI;
60
61 if (local->monitors)
Michael Wu8cc9a732008-01-31 19:48:23 +010062 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;
Johannes Berg4150c572007-09-17 01:29:23 -040075
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
Johannes Bergb2c258f2007-07-27 15:43:23 +020091/* master interface */
Jiri Bencf0706e82007-05-05 11:45:53 -070092
Johannes Berg0d143fe2008-09-11 00:01:59 +020093static 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
99static 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
Jiri Bencf0706e82007-05-05 11:45:53 -0700107static int ieee80211_master_open(struct net_device *dev)
108{
Johannes Berg133b8222008-09-16 14:18:59 +0200109 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
110 struct ieee80211_local *local = mpriv->local;
Jiri Bencf0706e82007-05-05 11:45:53 -0700111 struct ieee80211_sub_if_data *sdata;
112 int res = -EOPNOTSUPP;
113
Johannes Berg79010422007-09-18 17:29:21 -0400114 /* we hold the RTNL here so can safely walk the list */
115 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg3e122be2008-07-09 14:40:34 +0200116 if (netif_running(sdata->dev)) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700117 res = 0;
118 break;
119 }
120 }
Johannes Berg36d68252008-05-15 12:55:26 +0200121
122 if (res)
123 return res;
124
David S. Miller51cb6db2008-07-15 03:34:57 -0700125 netif_tx_start_all_queues(local->mdev);
Johannes Berg36d68252008-05-15 12:55:26 +0200126
127 return 0;
Jiri Bencf0706e82007-05-05 11:45:53 -0700128}
129
130static int ieee80211_master_stop(struct net_device *dev)
131{
Johannes Berg133b8222008-09-16 14:18:59 +0200132 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
133 struct ieee80211_local *local = mpriv->local;
Jiri Bencf0706e82007-05-05 11:45:53 -0700134 struct ieee80211_sub_if_data *sdata;
135
Johannes Berg79010422007-09-18 17:29:21 -0400136 /* we hold the RTNL here so can safely walk the list */
137 list_for_each_entry(sdata, &local->interfaces, list)
Johannes Berg3e122be2008-07-09 14:40:34 +0200138 if (netif_running(sdata->dev))
Jiri Bencf0706e82007-05-05 11:45:53 -0700139 dev_close(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700140
141 return 0;
142}
143
Johannes Berg4150c572007-09-17 01:29:23 -0400144static void ieee80211_master_set_multicast_list(struct net_device *dev)
145{
Johannes Berg133b8222008-09-16 14:18:59 +0200146 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
147 struct ieee80211_local *local = mpriv->local;
Johannes Berg4150c572007-09-17 01:29:23 -0400148
149 ieee80211_configure_filter(local);
150}
151
Johannes Bergb2c258f2007-07-27 15:43:23 +0200152/* everything else */
153
Johannes Berg9d139c82008-07-09 14:40:37 +0200154int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200155{
Johannes Berg9d139c82008-07-09 14:40:37 +0200156 struct ieee80211_local *local = sdata->local;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200157 struct ieee80211_if_conf conf;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200158
Johannes Berg9d139c82008-07-09 14:40:37 +0200159 if (WARN_ON(!netif_running(sdata->dev)))
160 return 0;
161
Johannes Berg7a725f72008-09-11 00:02:00 +0200162 if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
163 return -EINVAL;
164
Johannes Berg9d139c82008-07-09 14:40:37 +0200165 if (!local->ops->config_interface)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200166 return 0;
167
168 memset(&conf, 0, sizeof(conf));
Johannes Berg9d139c82008-07-09 14:40:37 +0200169 conf.changed = changed;
170
Johannes Berg05c914f2008-09-11 00:01:58 +0200171 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
172 sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg4150c572007-09-17 01:29:23 -0400173 conf.bssid = sdata->u.sta.bssid;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200174 conf.ssid = sdata->u.sta.ssid;
175 conf.ssid_len = sdata->u.sta.ssid_len;
Johannes Berg05c914f2008-09-11 00:01:58 +0200176 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
Johannes Berg9d139c82008-07-09 14:40:37 +0200177 conf.bssid = sdata->dev->dev_addr;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200178 conf.ssid = sdata->u.ap.ssid;
179 conf.ssid_len = sdata->u.ap.ssid_len;
Johannes Berg9d139c82008-07-09 14:40:37 +0200180 } 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;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200188 }
Johannes Berg9d139c82008-07-09 14:40:37 +0200189
190 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
191 return -EINVAL;
192
193 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
194 return -EINVAL;
195
Johannes Bergb2c258f2007-07-27 15:43:23 +0200196 return local->ops->config_interface(local_to_hw(local),
Johannes Berg32bfd352007-12-19 01:31:26 +0100197 &sdata->vif, &conf);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200198}
199
Johannes Bergb2c258f2007-07-27 15:43:23 +0200200int ieee80211_hw_config(struct ieee80211_local *local)
201{
Johannes Bergb2c258f2007-07-27 15:43:23 +0200202 struct ieee80211_channel *chan;
203 int ret = 0;
204
Johannes Bergc2b13452008-09-11 00:01:55 +0200205 if (local->sw_scanning)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200206 chan = local->scan_channel;
Johannes Berg8318d782008-01-24 19:38:38 +0100207 else
Johannes Bergb2c258f2007-07-27 15:43:23 +0200208 chan = local->oper_channel;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200209
Johannes Berg8318d782008-01-24 19:38:38 +0100210 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;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200219
220#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Berg8318d782008-01-24 19:38:38 +0100221 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
222 wiphy_name(local->hw.wiphy), chan->center_freq);
223#endif
Johannes Bergb2c258f2007-07-27 15:43:23 +0200224
Michael Bueschf7c4dae2007-09-24 18:41:49 +0200225 if (local->open_count)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200226 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
227
228 return ret;
229}
230
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +0200231/**
Tomas Winkler38668c02008-03-28 16:33:32 -0700232 * 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.
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +0200235 */
Tomas Winkler38668c02008-03-28 16:33:32 -0700236u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +0200237 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;
Johannes Berg8318d782008-01-24 19:38:38 +0100241 struct ieee80211_supported_band *sband;
Tomas Winkler38668c02008-03-28 16:33:32 -0700242 struct ieee80211_ht_info ht_conf;
243 struct ieee80211_ht_bss_info ht_bss_conf;
Tomas Winkler38668c02008-03-28 16:33:32 -0700244 u32 changed = 0;
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +0800245 int i;
246 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
247 u8 tx_mcs_set_cap;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +0200248
Johannes Berg8318d782008-01-24 19:38:38 +0100249 sband = local->hw.wiphy->bands[conf->channel->band];
250
Tomas Winkler38668c02008-03-28 16:33:32 -0700251 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
252 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
253
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +0800254 /* HT is not supported */
255 if (!sband->ht_info.ht_supported) {
256 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
257 goto out;
258 }
Tomas Winkler38668c02008-03-28 16:33:32 -0700259
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +0800260 /* disable HT */
261 if (!enable_ht) {
Tomas Winkler38668c02008-03-28 16:33:32 -0700262 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
263 changed |= BSS_CHANGED_HT;
264 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +0800265 conf->ht_conf.ht_supported = 0;
266 goto out;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +0200267 }
268
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +0800269
270 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
271 changed |= BSS_CHANGED_HT;
272
273 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
274 ht_conf.ht_supported = 1;
275
276 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
Tomas Winkler00c5ae22008-09-03 11:26:42 +0800277 ht_conf.cap &= ~(IEEE80211_HT_CAP_SM_PS);
278 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_SM_PS;
Ron Rindjunskyedcdf8b2008-05-15 13:53:55 +0800279 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;
282
283 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
284 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
285
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;
295
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
313check_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 }
321out:
Tomas Winkler38668c02008-03-28 16:33:32 -0700322 return changed;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +0200323}
324
Johannes Berg471b3ef2007-12-28 14:32:58 +0100325void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
326 u32 changed)
Daniel Draked9430a32007-07-27 15:43:24 +0200327{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100328 struct ieee80211_local *local = sdata->local;
329
Johannes Berg7a725f72008-09-11 00:02:00 +0200330 if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
331 return;
332
Johannes Berg471b3ef2007-12-28 14:32:58 +0100333 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);
Daniel Draked9430a32007-07-27 15:43:24 +0200341}
342
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200343u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
Daniel Draked9430a32007-07-27 15:43:24 +0200344{
Johannes Berg471b3ef2007-12-28 14:32:58 +0100345 sdata->bss_conf.use_cts_prot = 0;
346 sdata->bss_conf.use_short_preamble = 0;
Tomas Winklerfc32f922008-07-03 01:27:13 +0300347 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
Daniel Draked9430a32007-07-27 15:43:24 +0200348}
349
Jiri Bencf0706e82007-05-05 11:45:53 -0700350void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
Johannes Berge039fa42008-05-15 12:55:29 +0200351 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -0700352{
353 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berge039fa42008-05-15 12:55:29 +0200354 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700355 int tmp;
356
357 skb->dev = local->mdev;
Jiri Bencf0706e82007-05-05 11:45:53 -0700358 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
Johannes Berge039fa42008-05-15 12:55:29 +0200359 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
Jiri Bencf0706e82007-05-05 11:45:53 -0700360 &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))) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700365 dev_kfree_skb_irq(skb);
366 tmp--;
367 I802_DEBUG_INC(local->tx_status_drop);
368 }
369 tasklet_schedule(&local->tasklet);
370}
371EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
372
373static 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;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200378 struct ieee80211_ra_tid *ra_tid;
Jiri Bencf0706e82007-05-05 11:45:53 -0700379
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));
Johannes Berg51fb61e2007-12-19 01:31:27 +0100386 /* Clear skb->pkt_type in order to not confuse kernel
Jiri Bencf0706e82007-05-05 11:45:53 -0700387 * netstack. */
388 skb->pkt_type = 0;
389 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
390 break;
391 case IEEE80211_TX_STATUS_MSG:
Jiri Bencf0706e82007-05-05 11:45:53 -0700392 skb->pkt_type = 0;
Johannes Berge039fa42008-05-15 12:55:29 +0200393 ieee80211_tx_status(local_to_hw(local), skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700394 break;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200395 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 ;
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200407 default:
408 WARN_ON(1);
Jiri Bencf0706e82007-05-05 11:45:53 -0700409 dev_kfree_skb(skb);
410 break;
411 }
412 }
413}
414
Jiri Bencf0706e82007-05-05 11:45:53 -0700415/* 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.
Johannes Bergd0f09802008-07-29 11:32:07 +0200418 */
Jiri Bencf0706e82007-05-05 11:45:53 -0700419static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
420 struct ieee80211_key *key,
Johannes Berge039fa42008-05-15 12:55:29 +0200421 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -0700422{
Harvey Harrison62bf1d72008-07-15 18:44:05 -0700423 unsigned int hdrlen, iv_len, mic_len;
424 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
Jiri Bencf0706e82007-05-05 11:45:53 -0700425
Harvey Harrison62bf1d72008-07-15 18:44:05 -0700426 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Jiri Bencf0706e82007-05-05 11:45:53 -0700427
428 if (!key)
429 goto no_key;
430
Johannes Berg8f20fc22007-08-28 17:01:54 -0400431 switch (key->conf.alg) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700432 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
Harvey Harrison62bf1d72008-07-15 18:44:05 -0700448 if (skb->len >= hdrlen + mic_len &&
Johannes Berg11a843b2007-08-28 17:01:55 -0400449 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
Jiri Bencf0706e82007-05-05 11:45:53 -0700450 skb_trim(skb, skb->len - mic_len);
Harvey Harrison62bf1d72008-07-15 18:44:05 -0700451 if (skb->len >= hdrlen + iv_len) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700452 memmove(skb->data + iv_len, skb->data, hdrlen);
Harvey Harrison62bf1d72008-07-15 18:44:05 -0700453 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
Jiri Bencf0706e82007-05-05 11:45:53 -0700454 }
455
456no_key:
Harvey Harrison62bf1d72008-07-15 18:44:05 -0700457 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);
Jiri Bencf0706e82007-05-05 11:45:53 -0700462 }
463}
464
Johannes Bergd46e1442008-02-20 23:59:33 +0100465static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
466 struct sta_info *sta,
Johannes Berge039fa42008-05-15 12:55:29 +0200467 struct sk_buff *skb)
Johannes Bergd46e1442008-02-20 23:59:33 +0100468{
Johannes Berge039fa42008-05-15 12:55:29 +0200469 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
470
Johannes Bergd46e1442008-02-20 23:59:33 +0100471 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
Yi Zhuf6d97102008-05-27 17:50:50 +0300476 * when it wakes up for the next time.
Johannes Bergd46e1442008-02-20 23:59:33 +0100477 */
Johannes Berg07346f812008-05-03 01:02:02 +0200478 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
Johannes Bergd46e1442008-02-20 23:59:33 +0100479
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 */
Johannes Berg07346f812008-05-03 01:02:02 +0200510 if (test_sta_flags(sta, WLAN_STA_PS) &&
Johannes Bergd46e1442008-02-20 23:59:33 +0100511 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
Johannes Berge039fa42008-05-15 12:55:29 +0200512 ieee80211_remove_tx_extra(local, sta->key, skb);
Johannes Bergd46e1442008-02-20 23:59:33 +0100513 skb_queue_tail(&sta->tx_filtered, skb);
514 return;
515 }
516
Johannes Berg07346f812008-05-03 01:02:02 +0200517 if (!test_sta_flags(sta, WLAN_STA_PS) &&
Johannes Berge039fa42008-05-15 12:55:29 +0200518 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
Johannes Bergd46e1442008-02-20 23:59:33 +0100519 /* Software retry the packet once */
Johannes Berge039fa42008-05-15 12:55:29 +0200520 info->flags |= IEEE80211_TX_CTL_REQUEUE;
521 ieee80211_remove_tx_extra(local, sta->key, skb);
Johannes Bergd46e1442008-02-20 23:59:33 +0100522 dev_queue_xmit(skb);
523 return;
524 }
525
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200526#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergd46e1442008-02-20 23:59:33 +0100527 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),
Johannes Berg07346f812008-05-03 01:02:02 +0200532 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200533#endif
Johannes Bergd46e1442008-02-20 23:59:33 +0100534 dev_kfree_skb(skb);
535}
536
Johannes Berge039fa42008-05-15 12:55:29 +0200537void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -0700538{
539 struct sk_buff *skb2;
540 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
541 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berge039fa42008-05-15 12:55:29 +0200542 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700543 u16 frag, type;
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300544 __le16 fc;
Johannes Berg4b7679a2008-09-18 18:14:18 +0200545 struct ieee80211_supported_band *sband;
Johannes Bergb306f452007-07-10 19:32:08 +0200546 struct ieee80211_tx_status_rtap_hdr *rthdr;
547 struct ieee80211_sub_if_data *sdata;
Michael Wu3d30d942008-01-31 19:48:27 +0100548 struct net_device *prev_dev = NULL;
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300549 struct sta_info *sta;
Jiri Bencf0706e82007-05-05 11:45:53 -0700550
Johannes Bergd0709a62008-02-25 16:27:46 +0100551 rcu_read_lock();
552
Johannes Berg95dac0402008-09-11 02:03:28 +0200553 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;
Jiri Bencf0706e82007-05-05 11:45:53 -0700565 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700566
Johannes Berg95dac0402008-09-11 02:03:28 +0200567 fc = hdr->frame_control;
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300568
Johannes Berg95dac0402008-09-11 02:03:28 +0200569 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
570 (ieee80211_is_data_qos(fc))) {
571 u16 tid, ssn;
572 u8 *qc;
573
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300574 qc = ieee80211_get_qos_ctl(hdr);
575 tid = qc[0] & 0xf;
576 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
577 & IEEE80211_SCTL_SEQ);
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200578 ieee80211_send_bar(sta->sdata, hdr->addr1,
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300579 tid, ssn);
580 }
Ron Rindjunsky429a3802008-07-01 14:16:03 +0300581
Johannes Berg95dac0402008-09-11 02:03:28 +0200582 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
Johannes Berge039fa42008-05-15 12:55:29 +0200583 ieee80211_handle_filtered_frame(local, sta, skb);
Johannes Bergd0709a62008-02-25 16:27:46 +0100584 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -0700585 return;
Johannes Berg95dac0402008-09-11 02:03:28 +0200586 } else {
587 if (info->status.excessive_retries)
588 sta->tx_retry_failed++;
589 sta->tx_retry_count += info->status.retry_count;
Jiri Bencf0706e82007-05-05 11:45:53 -0700590 }
Johannes Berg95dac0402008-09-11 02:03:28 +0200591
Johannes Berg4b7679a2008-09-18 18:14:18 +0200592 sband = local->hw.wiphy->bands[info->band];
593 rate_control_tx_status(local, sband, sta, skb);
Johannes Berg95dac0402008-09-11 02:03:28 +0200594 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700595
Johannes Bergd0709a62008-02-25 16:27:46 +0100596 rcu_read_unlock();
597
Jiri Bencf0706e82007-05-05 11:45:53 -0700598 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
Johannes Berge039fa42008-05-15 12:55:29 +0200608 if (info->flags & IEEE80211_TX_STAT_ACK) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700609 if (frag == 0) {
610 local->dot11TransmittedFrameCount++;
611 if (is_multicast_ether_addr(hdr->addr1))
612 local->dot11MulticastTransmittedFrameCount++;
Johannes Berge039fa42008-05-15 12:55:29 +0200613 if (info->status.retry_count > 0)
Jiri Bencf0706e82007-05-05 11:45:53 -0700614 local->dot11RetryCount++;
Johannes Berge039fa42008-05-15 12:55:29 +0200615 if (info->status.retry_count > 1)
Jiri Bencf0706e82007-05-05 11:45:53 -0700616 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
Johannes Bergb306f452007-07-10 19:32:08 +0200632 /* this was a transmitted frame, but now we want to reuse it */
633 skb_orphan(skb);
634
Michael Wu3d30d942008-01-31 19:48:27 +0100635 /*
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) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700640 dev_kfree_skb(skb);
641 return;
642 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700643
Johannes Bergb306f452007-07-10 19:32:08 +0200644 /* send frame to monitor interfaces now */
645
646 if (skb_headroom(skb) < sizeof(*rthdr)) {
647 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
648 dev_kfree_skb(skb);
649 return;
650 }
651
Johannes Berg988c0f72008-04-17 19:21:22 +0200652 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
Johannes Bergb306f452007-07-10 19:32:08 +0200653 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
Johannes Berge039fa42008-05-15 12:55:29 +0200661 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
Johannes Bergb306f452007-07-10 19:32:08 +0200662 !is_multicast_ether_addr(hdr->addr1))
663 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
664
Johannes Berge039fa42008-05-15 12:55:29 +0200665 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
666 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
Johannes Bergb306f452007-07-10 19:32:08 +0200667 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
Johannes Berge039fa42008-05-15 12:55:29 +0200668 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
Johannes Bergb306f452007-07-10 19:32:08 +0200669 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
670
Johannes Berge039fa42008-05-15 12:55:29 +0200671 rthdr->data_retries = info->status.retry_count;
Johannes Bergb306f452007-07-10 19:32:08 +0200672
Michael Wu3d30d942008-01-31 19:48:27 +0100673 /* 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));
Johannes Bergb306f452007-07-10 19:32:08 +0200679
Michael Wu3d30d942008-01-31 19:48:27 +0100680 rcu_read_lock();
681 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200682 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
Johannes Bergb306f452007-07-10 19:32:08 +0200683 if (!netif_running(sdata->dev))
684 continue;
Michael Wu3d30d942008-01-31 19:48:27 +0100685
686 if (prev_dev) {
Johannes Berg79010422007-09-18 17:29:21 -0400687 skb2 = skb_clone(skb, GFP_ATOMIC);
Michael Wu3d30d942008-01-31 19:48:27 +0100688 if (skb2) {
689 skb2->dev = prev_dev;
690 netif_rx(skb2);
691 }
692 }
693
694 prev_dev = sdata->dev;
Johannes Bergb306f452007-07-10 19:32:08 +0200695 }
696 }
Michael Wu3d30d942008-01-31 19:48:27 +0100697 if (prev_dev) {
698 skb->dev = prev_dev;
699 netif_rx(skb);
700 skb = NULL;
701 }
Johannes Berg79010422007-09-18 17:29:21 -0400702 rcu_read_unlock();
Michael Wu3d30d942008-01-31 19:48:27 +0100703 dev_kfree_skb(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -0700704}
705EXPORT_SYMBOL(ieee80211_tx_status);
706
Jiri Bencf0706e82007-05-05 11:45:53 -0700707struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
708 const struct ieee80211_ops *ops)
709{
Jiri Bencf0706e82007-05-05 11:45:53 -0700710 struct ieee80211_local *local;
Jiri Bencf0706e82007-05-05 11:45:53 -0700711 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
Johannes Berg4480f15c2007-07-10 19:32:10 +0200747 BUG_ON(!ops->tx);
Johannes Berg4150c572007-09-17 01:29:23 -0400748 BUG_ON(!ops->start);
749 BUG_ON(!ops->stop);
Johannes Berg4480f15c2007-07-10 19:32:10 +0200750 BUG_ON(!ops->config);
751 BUG_ON(!ops->add_interface);
Johannes Berg4150c572007-09-17 01:29:23 -0400752 BUG_ON(!ops->remove_interface);
753 BUG_ON(!ops->configure_filter);
Jiri Bencf0706e82007-05-05 11:45:53 -0700754 local->ops = ops;
755
Jiri Bencf0706e82007-05-05 11:45:53 -0700756 local->hw.queues = 1; /* default */
757
Jiri Bencf0706e82007-05-05 11:45:53 -0700758 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;
Jiri Bencf0706e82007-05-05 11:45:53 -0700763
Johannes Berg79010422007-09-18 17:29:21 -0400764 INIT_LIST_HEAD(&local->interfaces);
Jiri Bencf0706e82007-05-05 11:45:53 -0700765
Johannes Bergb16bd152008-04-11 21:40:35 +0200766 spin_lock_init(&local->key_lock);
767
Johannes Bergc2b13452008-09-11 00:01:55 +0200768 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
Jiri Bencf0706e82007-05-05 11:45:53 -0700769
770 sta_info_init(local);
771
Jiri Bencf0706e82007-05-05 11:45:53 -0700772 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}
786EXPORT_SYMBOL(ieee80211_alloc_hw);
787
788int ieee80211_register_hw(struct ieee80211_hw *hw)
789{
790 struct ieee80211_local *local = hw_to_local(hw);
791 const char *name;
792 int result;
Johannes Berg8318d782008-01-24 19:38:38 +0100793 enum ieee80211_band band;
Johannes Berg96d51052008-02-08 09:48:13 +0100794 struct net_device *mdev;
Johannes Berg133b8222008-09-16 14:18:59 +0200795 struct ieee80211_master_priv *mpriv;
Johannes Berg8318d782008-01-24 19:38:38 +0100796
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 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700814
Luis R. Rodriguezf59ac042008-08-29 16:26:43 -0700815 /* 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
Jiri Bencf0706e82007-05-05 11:45:53 -0700822 result = wiphy_register(local->hw.wiphy);
823 if (result < 0)
824 return result;
825
Johannes Berge2530082008-05-17 00:57:14 +0200826 /*
827 * We use the number of queues for feature tests (QoS, HT) internally
828 * so restrict them appropriately.
829 */
Johannes Berge2530082008-05-17 00:57:14 +0200830 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;
Johannes Berge2530082008-05-17 00:57:14 +0200836
Johannes Berg133b8222008-09-16 14:18:59 +0200837 mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv),
Johannes Berge2530082008-05-17 00:57:14 +0200838 "wmaster%d", ether_setup,
839 ieee80211_num_queues(hw));
Johannes Berg96d51052008-02-08 09:48:13 +0100840 if (!mdev)
841 goto fail_mdev_alloc;
842
Johannes Berg133b8222008-09-16 14:18:59 +0200843 mpriv = netdev_priv(mdev);
844 mpriv->local = local;
Johannes Berg96d51052008-02-08 09:48:13 +0100845 local->mdev = mdev;
846
Johannes Berg3e122be2008-07-09 14:40:34 +0200847 ieee80211_rx_bss_list_init(local);
Johannes Berg96d51052008-02-08 09:48:13 +0100848
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
Jiri Bencf0706e82007-05-05 11:45:53 -0700856 name = wiphy_dev(local->hw.wiphy)->driver->name;
Johannes Berg59959a62008-06-26 19:59:56 +0200857 local->hw.workqueue = create_freezeable_workqueue(name);
Jiri Bencf0706e82007-05-05 11:45:53 -0700858 if (!local->hw.workqueue) {
859 result = -ENOMEM;
860 goto fail_workqueue;
861 }
862
Johannes Bergb306f452007-07-10 19:32:08 +0200863 /*
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 */
Jiri Benc33ccad32007-07-18 17:10:44 +0200868 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
869 sizeof(struct ieee80211_tx_status_rtap_hdr));
Johannes Bergb306f452007-07-10 19:32:08 +0200870
Jiri Bence9f207f2007-05-05 11:46:38 -0700871 debugfs_hw_add(local);
872
Tomas Winklerdc0ae302008-06-12 22:38:37 +0300873 if (local->hw.conf.beacon_int < 10)
874 local->hw.conf.beacon_int = 100;
Jiri Bencf0706e82007-05-05 11:45:53 -0700875
Tomas Winklerea95bba2008-07-18 13:53:00 +0800876 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
Bruno Randolf566bfe52008-05-08 19:15:40 +0200881 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
882 IEEE80211_HW_SIGNAL_DB |
883 IEEE80211_HW_SIGNAL_DBM) ?
Jiri Bencf0706e82007-05-05 11:45:53 -0700884 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
Bruno Randolf566bfe52008-05-08 19:15:40 +0200885 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
Jiri Bencf0706e82007-05-05 11:45:53 -0700886 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
Bruno Randolf566bfe52008-05-08 19:15:40 +0200887 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
Jiri Bencf0706e82007-05-05 11:45:53 -0700888 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
Johannes Berg830f9032007-10-28 14:51:05 +0100906 result = ieee80211_init_rate_ctrl_alg(local,
907 hw->rate_control_algorithm);
Jiri Bencf0706e82007-05-05 11:45:53 -0700908 if (result < 0) {
909 printk(KERN_DEBUG "%s: Failed to initialize rate control "
Johannes Bergdd1cd4c2007-09-18 17:29:20 -0400910 "algorithm\n", wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -0700911 goto fail_rate;
912 }
913
914 result = ieee80211_wep_init(local);
915
916 if (result < 0) {
Jeremy Fitzhardinge023a04b2008-07-14 12:52:08 -0700917 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
918 wiphy_name(local->hw.wiphy), result);
Jiri Bencf0706e82007-05-05 11:45:53 -0700919 goto fail_wep;
920 }
921
David S. Miller51cb6db2008-07-15 03:34:57 -0700922 local->mdev->select_queue = ieee80211_select_queue;
Jiri Bencf0706e82007-05-05 11:45:53 -0700923
924 /* add one default STA interface */
Johannes Berg3e122be2008-07-09 14:40:34 +0200925 result = ieee80211_if_add(local, "wlan%d", NULL,
Johannes Berg05c914f2008-09-11 00:01:58 +0200926 NL80211_IFTYPE_STATION, NULL);
Jiri Bencf0706e82007-05-05 11:45:53 -0700927 if (result)
928 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -0400929 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -0700930
Jiri Bencf0706e82007-05-05 11:45:53 -0700931 rtnl_unlock();
932
933 ieee80211_led_init(local);
934
935 return 0;
936
937fail_wep:
938 rate_control_deinitialize(local);
939fail_rate:
940 unregister_netdevice(local->mdev);
Pavel Emelyanov339a7c42008-05-04 17:59:30 -0700941 local->mdev = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -0700942fail_dev:
943 rtnl_unlock();
944 sta_info_stop(local);
945fail_sta_info:
Jiri Bence9f207f2007-05-05 11:46:38 -0700946 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700947 destroy_workqueue(local->hw.workqueue);
948fail_workqueue:
Johannes Berg3e122be2008-07-09 14:40:34 +0200949 if (local->mdev)
950 free_netdev(local->mdev);
Johannes Berg96d51052008-02-08 09:48:13 +0100951fail_mdev_alloc:
Jiri Bencf0706e82007-05-05 11:45:53 -0700952 wiphy_unregister(local->hw.wiphy);
953 return result;
954}
955EXPORT_SYMBOL(ieee80211_register_hw);
956
Jiri Bencf0706e82007-05-05 11:45:53 -0700957void ieee80211_unregister_hw(struct ieee80211_hw *hw)
958{
959 struct ieee80211_local *local = hw_to_local(hw);
Jiri Bencf0706e82007-05-05 11:45:53 -0700960
961 tasklet_kill(&local->tx_pending_tasklet);
962 tasklet_kill(&local->tasklet);
963
964 rtnl_lock();
965
Johannes Berg79010422007-09-18 17:29:21 -0400966 /*
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 */
Johannes Berg5b2812e2007-09-26 14:27:23 +0200971
Johannes Berg75636522008-07-09 14:40:35 +0200972 /* First, we remove all virtual interfaces. */
973 ieee80211_remove_interfaces(local);
Johannes Berg5b2812e2007-09-26 14:27:23 +0200974
975 /* then, finally, remove the master interface */
Johannes Berg3e122be2008-07-09 14:40:34 +0200976 unregister_netdevice(local->mdev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700977
978 rtnl_unlock();
979
Johannes Berg3e122be2008-07-09 14:40:34 +0200980 ieee80211_rx_bss_list_deinit(local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700981 ieee80211_clear_tx_pending(local);
982 sta_info_stop(local);
983 rate_control_deinitialize(local);
Jiri Bence9f207f2007-05-05 11:46:38 -0700984 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700985
Jiri Bencf0706e82007-05-05 11:45:53 -0700986 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",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -0400989 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -0700990 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);
Johannes Berg3e122be2008-07-09 14:40:34 +0200997 free_netdev(local->mdev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700998}
999EXPORT_SYMBOL(ieee80211_unregister_hw);
1000
1001void ieee80211_free_hw(struct ieee80211_hw *hw)
1002{
1003 struct ieee80211_local *local = hw_to_local(hw);
1004
Jiri Bencf0706e82007-05-05 11:45:53 -07001005 wiphy_free(local->hw.wiphy);
1006}
1007EXPORT_SYMBOL(ieee80211_free_hw);
1008
Jiri Bencf0706e82007-05-05 11:45:53 -07001009static int __init ieee80211_init(void)
1010{
1011 struct sk_buff *skb;
1012 int ret;
1013
Johannes Berge039fa42008-05-15 12:55:29 +02001014 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1015 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1016 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
Jiri Bencf0706e82007-05-05 11:45:53 -07001017
Felix Fietkaucccf1292008-10-05 18:07:45 +02001018 ret = rc80211_minstrel_init();
1019 if (ret)
1020 return ret;
1021
Johannes Berg4b475892008-01-02 15:17:03 +01001022 ret = rc80211_pid_init();
Mattias Nisslerad018372007-12-19 01:25:57 +01001023 if (ret)
David S. Miller51cb6db2008-07-15 03:34:57 -07001024 return ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07001025
Jiri Bence9f207f2007-05-05 11:46:38 -07001026 ieee80211_debugfs_netdev_init();
1027
Jiri Bencf0706e82007-05-05 11:45:53 -07001028 return 0;
1029}
1030
Jiri Bencf0706e82007-05-05 11:45:53 -07001031static void __exit ieee80211_exit(void)
1032{
Johannes Berg4b475892008-01-02 15:17:03 +01001033 rc80211_pid_exit();
Felix Fietkaucccf1292008-10-05 18:07:45 +02001034 rc80211_minstrel_exit();
Johannes Bergac71c692007-10-28 14:17:44 +01001035
Johannes Berg3b967662008-04-08 17:56:52 +02001036 /*
1037 * For key todo, it'll be empty by now but the work
1038 * might still be scheduled.
1039 */
1040 flush_scheduled_work();
1041
Luis Carlos Cobof7a92142008-02-23 15:17:18 +01001042 if (mesh_allocated)
1043 ieee80211s_stop();
Johannes Berg902acc72008-02-23 15:17:19 +01001044
Jiri Bence9f207f2007-05-05 11:46:38 -07001045 ieee80211_debugfs_netdev_exit();
Jiri Bencf0706e82007-05-05 11:45:53 -07001046}
1047
1048
Johannes Bergca9938f2007-09-11 12:50:32 +02001049subsys_initcall(ieee80211_init);
Jiri Bencf0706e82007-05-05 11:45:53 -07001050module_exit(ieee80211_exit);
1051
1052MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1053MODULE_LICENSE("GPL");