blob: 91e16b4d4e3ca1e3d370a2329eab00bcbd068d23 [file] [log] [blame]
Johannes Bergc2d15602007-07-27 15:43:23 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
Johannes Bergd98ad832014-09-03 15:24:57 +03006 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Bergc2d15602007-07-27 15:43:23 +02007 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15#include <net/mac80211.h>
16#include <linux/netdevice.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040017#include <linux/export.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020018#include <linux/types.h>
19#include <linux/slab.h>
20#include <linux/skbuff.h>
21#include <linux/etherdevice.h>
22#include <linux/if_arp.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020023#include <linux/bitmap.h>
Johannes Bergdd769862011-11-18 16:54:50 +010024#include <linux/crc32.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070025#include <net/net_namespace.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020026#include <net/cfg80211.h>
Johannes Bergdabeb342007-11-09 01:57:29 +010027#include <net/rtnetlink.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020028
29#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020030#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040031#include "rate.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010032#include "mesh.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020033#include "wme.h"
Johannes Bergf2753dd2009-04-14 10:09:24 +020034#include "led.h"
Johannes Bergfffd0932009-07-08 14:22:54 +020035#include "wep.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020036
37/* privid for wiphys to determine whether they belong to us or not */
Johannes Berg8a47cea2014-01-20 23:55:44 +010038const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
Johannes Bergc2d15602007-07-27 15:43:23 +020039
Luis R. Rodriguez9a953712009-01-22 15:05:53 -080040struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41{
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47}
48EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
Johannes Bergc2d15602007-07-27 15:43:23 +020049
Ron Rindjunsky71364712007-12-25 17:00:36 +020050u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
Johannes Berg05c914f2008-09-11 00:01:58 +020051 enum nl80211_iftype type)
Johannes Bergc2d15602007-07-27 15:43:23 +020052{
Harvey Harrisona494bb12008-06-11 14:21:58 -070053 __le16 fc = hdr->frame_control;
Johannes Bergc2d15602007-07-27 15:43:23 +020054
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020055 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
Johannes Bergc2d15602007-07-27 15:43:23 +020057 return NULL;
58
Harvey Harrisona494bb12008-06-11 14:21:58 -070059 if (ieee80211_is_data(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020060 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070062
63 if (ieee80211_has_a4(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020064 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070065 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020068 return hdr->addr2;
Harvey Harrisona494bb12008-06-11 14:21:58 -070069
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020074 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
Johannes Bergc2d15602007-07-27 15:43:23 +020076 return hdr->addr3;
Harvey Harrisona494bb12008-06-11 14:21:58 -070077 }
78
79 if (ieee80211_is_ctl(fc)) {
Weilong Chenf359d3f2013-12-18 15:44:16 +080080 if (ieee80211_is_pspoll(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020081 return hdr->addr1;
Harvey Harrisona494bb12008-06-11 14:21:58 -070082
83 if (ieee80211_is_back_req(fc)) {
Ron Rindjunsky71364712007-12-25 17:00:36 +020084 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +020085 case NL80211_IFTYPE_STATION:
Ron Rindjunsky71364712007-12-25 17:00:36 +020086 return hdr->addr2;
Johannes Berg05c914f2008-09-11 00:01:58 +020087 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
Ron Rindjunsky71364712007-12-25 17:00:36 +020089 return hdr->addr1;
90 default:
Harvey Harrisona494bb12008-06-11 14:21:58 -070091 break; /* fall through to the return */
Ron Rindjunsky71364712007-12-25 17:00:36 +020092 }
93 }
Johannes Bergc2d15602007-07-27 15:43:23 +020094 }
95
96 return NULL;
97}
98
Johannes Berg5cf121c2008-02-25 16:27:43 +010099void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Bergc2d15602007-07-27 15:43:23 +0200100{
Johannes Berg252b86c2011-11-16 15:28:55 +0100101 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100102 struct ieee80211_hdr *hdr;
Johannes Bergc2d15602007-07-27 15:43:23 +0200103
Johannes Berg252b86c2011-11-16 15:28:55 +0100104 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
Johannes Berg252b86c2011-11-16 15:28:55 +0100107 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200108}
109
Michal Kazior4ee73f32012-04-11 08:47:56 +0200110int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200111 int rate, int erp, int short_preamble,
112 int shift)
Johannes Bergc2d15602007-07-27 15:43:23 +0200113{
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
Johannes Bergc2d15602007-07-27 15:43:23 +0200126 */
127
Michal Kazior4ee73f32012-04-11 08:47:56 +0200128 if (band == IEEE80211_BAND_5GHZ || erp) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
Johannes Bergc2d15602007-07-27 15:43:23 +0200139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
Johannes Bergc2d15602007-07-27 15:43:23 +0200142 dur = 16; /* SIFS + signal ext */
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
Johannes Bergc2d15602007-07-27 15:43:23 +0200157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175}
176
177/* Exported duration function for driver use */
Johannes Berg32bfd352007-12-19 01:31:26 +0100178__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
Michal Kazior4ee73f32012-04-11 08:47:56 +0200180 enum ieee80211_band band,
Johannes Berg8318d782008-01-24 19:38:38 +0100181 size_t frame_len,
182 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200183{
Johannes Berg25d834e2008-09-12 22:52:47 +0200184 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200185 u16 dur;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200186 int erp, shift = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200187 bool short_preamble = false;
Johannes Bergc2d15602007-07-27 15:43:23 +0200188
Johannes Berg8318d782008-01-24 19:38:38 +0100189 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200190 if (vif) {
191 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200195 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200196 }
Johannes Berg8318d782008-01-24 19:38:38 +0100197
Michal Kazior4ee73f32012-04-11 08:47:56 +0200198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200199 short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200200
201 return cpu_to_le16(dur);
202}
203EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
Johannes Berg32bfd352007-12-19 01:31:26 +0100205__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200207 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200208{
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200211 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100212 bool short_preamble;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200213 int erp, shift = 0, bitrate;
Johannes Bergc2d15602007-07-27 15:43:23 +0200214 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200215 struct ieee80211_supported_band *sband;
216
Michal Kazior4ee73f32012-04-11 08:47:56 +0200217 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200218
Johannes Berg25d834e2008-09-12 22:52:47 +0200219 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200220
Johannes Berge039fa42008-05-15 12:55:29 +0200221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100222
223 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200224 if (vif) {
225 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200229 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200230 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200231
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
Johannes Bergc2d15602007-07-27 15:43:23 +0200234 /* CTS duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200236 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200237 /* Data frame duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200239 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200240 /* ACK duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200242 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200243
244 return cpu_to_le16(dur);
245}
246EXPORT_SYMBOL(ieee80211_rts_duration);
247
Johannes Berg32bfd352007-12-19 01:31:26 +0100248__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
Johannes Bergc2d15602007-07-27 15:43:23 +0200250 size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200251 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200252{
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200255 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100256 bool short_preamble;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200257 int erp, shift = 0, bitrate;
Johannes Bergc2d15602007-07-27 15:43:23 +0200258 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200259 struct ieee80211_supported_band *sband;
260
Michal Kazior4ee73f32012-04-11 08:47:56 +0200261 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200262
Johannes Berg25d834e2008-09-12 22:52:47 +0200263 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200264
Johannes Berge039fa42008-05-15 12:55:29 +0200265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100266 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200267 if (vif) {
268 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200272 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200273 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200274
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
Johannes Bergc2d15602007-07-27 15:43:23 +0200277 /* Data frame duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200279 erp, short_preamble, shift);
Johannes Berge039fa42008-05-15 12:55:29 +0200280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200281 /* ACK duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200283 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200284 }
285
Johannes Bergc2d15602007-07-27 15:43:23 +0200286 return cpu_to_le16(dur);
287}
288EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200290void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291{
292 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
Johannes Bergf142c6b2012-06-18 20:07:15 +0200301 if (!sdata->dev)
302 continue;
303
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
Johannes Berga6f38ac2012-07-04 12:49:59 +0200308 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200309 int ac_queue = sdata->vif.hw_queue[ac];
310
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318}
319
Kalle Valoce7c9112008-12-18 23:35:20 +0200320static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300321 enum queue_stop_reason reason,
322 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200323{
324 struct ieee80211_local *local = hw_to_local(hw);
325
Johannes Bergb5878a22010-04-07 16:48:40 +0200326 trace_wake_queue(local, queue, reason);
327
Johannes Berge4e72fb2009-03-23 17:28:42 +0100328 if (WARN_ON(queue >= hw->queues))
329 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200330
Johannes Bergada15122012-03-28 11:04:27 +0200331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
Luciano Coelhocca07b02014-06-13 16:30:05 +0300334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Berg96f5e662009-02-12 00:51:53 +0100341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
Johannes Berg7236fe22010-03-22 13:42:43 -0700346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200348 ieee80211_propagate_queue_wake(local, queue);
Johannes Berg7236fe22010-03-22 13:42:43 -0700349 rcu_read_unlock();
350 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200351 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200352}
Kalle Valoce7c9112008-12-18 23:35:20 +0200353
Johannes Berg96f5e662009-02-12 00:51:53 +0100354void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300355 enum queue_stop_reason reason,
356 bool refcounted)
Kalle Valoce7c9112008-12-18 23:35:20 +0200357{
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364}
365
366void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367{
368 ieee80211_wake_queue_by_reason(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
Kalle Valoce7c9112008-12-18 23:35:20 +0200371}
Johannes Bergc2d15602007-07-27 15:43:23 +0200372EXPORT_SYMBOL(ieee80211_wake_queue);
373
Kalle Valoce7c9112008-12-18 23:35:20 +0200374static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300375 enum queue_stop_reason reason,
376 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200377{
378 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100379 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200380 int n_acs = IEEE80211_NUM_ACS;
Johannes Bergc2d15602007-07-27 15:43:23 +0200381
Johannes Bergb5878a22010-04-07 16:48:40 +0200382 trace_stop_queue(local, queue, reason);
383
Johannes Berge4e72fb2009-03-23 17:28:42 +0100384 if (WARN_ON(queue >= hw->queues))
385 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100386
Luciano Coelhocca07b02014-06-13 16:30:05 +0300387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
Johannes Bergada15122012-03-28 11:04:27 +0200391
Luciano Coelhocca07b02014-06-13 16:30:05 +0300392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
Johannes Bergcf0277e2010-01-05 18:00:58 +0100394
Johannes Berga6f38ac2012-07-04 12:49:59 +0200395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
Johannes Bergcf0277e2010-01-05 18:00:58 +0100398 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
Johannes Bergf142c6b2012-06-18 20:07:15 +0200402 if (!sdata->dev)
403 continue;
404
Johannes Berga6f38ac2012-07-04 12:49:59 +0200405 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
Johannes Bergcf0277e2010-01-05 18:00:58 +0100411 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200412}
Kalle Valoce7c9112008-12-18 23:35:20 +0200413
Johannes Berg96f5e662009-02-12 00:51:53 +0100414void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300415 enum queue_stop_reason reason,
416 bool refcounted)
Kalle Valoce7c9112008-12-18 23:35:20 +0200417{
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424}
425
426void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427{
428 ieee80211_stop_queue_by_reason(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
Kalle Valoce7c9112008-12-18 23:35:20 +0200431}
Johannes Bergc2d15602007-07-27 15:43:23 +0200432EXPORT_SYMBOL(ieee80211_stop_queue);
433
Johannes Berg8f77f382009-06-07 21:58:37 +0200434void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436{
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
Johannes Berga7bc3762009-07-27 10:33:31 +0200439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200440 int queue = info->hw_queue;
Johannes Berga7bc3762009-07-27 10:33:31 +0200441
442 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200443 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200444 return;
445 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200450 __skb_queue_tail(&local->pending[queue], skb);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
Johannes Berg8f77f382009-06-07 21:58:37 +0200453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454}
455
Johannes Berge3685e02014-02-20 11:19:58 +0100456void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
Johannes Berg8f77f382009-06-07 21:58:37 +0200458{
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
Johannes Bergb0b97a82011-09-29 16:04:30 +0200462 int queue, i;
Johannes Berg8f77f382009-06-07 21:58:37 +0200463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200465 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200469 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200470 continue;
471 }
472
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200473 queue = info->hw_queue;
Johannes Berg4644ae82012-03-28 11:04:28 +0200474
475 __ieee80211_stop_queue(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
Johannes Berg4644ae82012-03-28 11:04:28 +0200478
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200479 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200480 }
481
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200482 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200483 __ieee80211_wake_queue(hw, i,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
Johannes Berg8f77f382009-06-07 21:58:37 +0200486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200487}
488
Kalle Valoce7c9112008-12-18 23:35:20 +0200489void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100490 unsigned long queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300491 enum queue_stop_reason reason,
492 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200493{
Kalle Valoce7c9112008-12-18 23:35:20 +0200494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200496 int i;
497
Kalle Valoce7c9112008-12-18 23:35:20 +0200498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
Johannes Berg445ea4e2013-02-13 12:25:28 +0100500 for_each_set_bit(i, &queues, hw->queues)
Luciano Coelhocca07b02014-06-13 16:30:05 +0300501 __ieee80211_stop_queue(hw, i, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504}
505
506void ieee80211_stop_queues(struct ieee80211_hw *hw)
507{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
Johannes Bergc2d15602007-07-27 15:43:23 +0200511}
512EXPORT_SYMBOL(ieee80211_stop_queues);
513
Tomas Winkler92ab8532008-07-24 21:02:04 +0300514int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515{
516 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200517 unsigned long flags;
518 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100519
Johannes Berge4e72fb2009-03-23 17:28:42 +0100520 if (WARN_ON(queue >= hw->queues))
521 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100522
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Thomas Pedersen2419ea12013-04-10 15:41:40 -0700524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300528}
529EXPORT_SYMBOL(ieee80211_queue_stopped);
530
Kalle Valoce7c9112008-12-18 23:35:20 +0200531void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100532 unsigned long queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300533 enum queue_stop_reason reason,
534 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200535{
Kalle Valoce7c9112008-12-18 23:35:20 +0200536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200538 int i;
539
Kalle Valoce7c9112008-12-18 23:35:20 +0200540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
Johannes Berg445ea4e2013-02-13 12:25:28 +0100542 for_each_set_bit(i, &queues, hw->queues)
Luciano Coelhocca07b02014-06-13 16:30:05 +0300543 __ieee80211_wake_queue(hw, i, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546}
547
548void ieee80211_wake_queues(struct ieee80211_hw *hw)
549{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
Johannes Bergc2d15602007-07-27 15:43:23 +0200553}
554EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100555
Luciano Coelho26da23b2014-06-13 16:30:06 +0300556static unsigned int
557ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
Johannes Berg39ecc012013-02-13 12:11:00 +0100559{
Luciano Coelho26da23b2014-06-13 16:30:06 +0300560 unsigned int queues;
Johannes Berg39ecc012013-02-13 12:11:00 +0100561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
Luciano Coelho26da23b2014-06-13 16:30:06 +0300576 return queues;
577}
578
579void ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata)
581{
582 unsigned int queues;
583
584 if (!local->ops->flush)
585 return;
586
587 queues = ieee80211_get_vif_queues(local, sdata);
588
Luciano Coelho59f48fe2014-06-13 16:30:04 +0300589 ieee80211_stop_queues_by_reason(&local->hw, queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300590 IEEE80211_QUEUE_STOP_REASON_FLUSH,
591 false);
Johannes Berg445ea4e2013-02-13 12:25:28 +0100592
Emmanuel Grumbach77be2c52014-03-27 11:30:29 +0200593 drv_flush(local, sdata, queues, false);
Johannes Berg445ea4e2013-02-13 12:25:28 +0100594
Luciano Coelho59f48fe2014-06-13 16:30:04 +0300595 ieee80211_wake_queues_by_reason(&local->hw, queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300596 IEEE80211_QUEUE_STOP_REASON_FLUSH,
597 false);
Johannes Berg39ecc012013-02-13 12:11:00 +0100598}
599
Luciano Coelho26da23b2014-06-13 16:30:06 +0300600void ieee80211_stop_vif_queues(struct ieee80211_local *local,
601 struct ieee80211_sub_if_data *sdata,
602 enum queue_stop_reason reason)
603{
604 ieee80211_stop_queues_by_reason(&local->hw,
605 ieee80211_get_vif_queues(local, sdata),
606 reason, true);
607}
608
609void ieee80211_wake_vif_queues(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata,
611 enum queue_stop_reason reason)
612{
613 ieee80211_wake_queues_by_reason(&local->hw,
614 ieee80211_get_vif_queues(local, sdata),
615 reason, true);
616}
617
Johannes Bergc7c71062013-08-21 22:07:20 +0200618static void __iterate_active_interfaces(struct ieee80211_local *local,
619 u32 iter_flags,
620 void (*iterator)(void *data, u8 *mac,
621 struct ieee80211_vif *vif),
622 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100623{
Johannes Bergdabeb342007-11-09 01:57:29 +0100624 struct ieee80211_sub_if_data *sdata;
625
Johannes Berge38bad42007-11-28 10:55:32 +0100626 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100627 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200628 case NL80211_IFTYPE_MONITOR:
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200629 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
630 continue;
631 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200632 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100633 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200634 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100635 break;
636 }
Johannes Berg8b2c9822012-11-06 20:23:30 +0100637 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
638 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
639 continue;
Johannes Berg9607e6b2009-12-23 13:15:31 +0100640 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100641 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100642 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100643 }
Johannes Berge38bad42007-11-28 10:55:32 +0100644
Johannes Bergc7c71062013-08-21 22:07:20 +0200645 sdata = rcu_dereference_check(local->monitor_sdata,
646 lockdep_is_held(&local->iflist_mtx) ||
647 lockdep_rtnl_is_held());
Johannes Berg8b2c9822012-11-06 20:23:30 +0100648 if (sdata &&
649 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
650 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg685fb722012-07-11 16:38:09 +0200651 iterator(data, sdata->vif.addr, &sdata->vif);
Johannes Bergc7c71062013-08-21 22:07:20 +0200652}
Johannes Berg685fb722012-07-11 16:38:09 +0200653
Johannes Bergc7c71062013-08-21 22:07:20 +0200654void ieee80211_iterate_active_interfaces(
655 struct ieee80211_hw *hw, u32 iter_flags,
656 void (*iterator)(void *data, u8 *mac,
657 struct ieee80211_vif *vif),
658 void *data)
659{
660 struct ieee80211_local *local = hw_to_local(hw);
661
662 mutex_lock(&local->iflist_mtx);
663 __iterate_active_interfaces(local, iter_flags, iterator, data);
664 mutex_unlock(&local->iflist_mtx);
665}
666EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
667
668void ieee80211_iterate_active_interfaces_atomic(
669 struct ieee80211_hw *hw, u32 iter_flags,
670 void (*iterator)(void *data, u8 *mac,
671 struct ieee80211_vif *vif),
672 void *data)
673{
674 struct ieee80211_local *local = hw_to_local(hw);
675
676 rcu_read_lock();
677 __iterate_active_interfaces(local, iter_flags, iterator, data);
Johannes Berge38bad42007-11-28 10:55:32 +0100678 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100679}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200680EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200681
Johannes Bergc7c71062013-08-21 22:07:20 +0200682void ieee80211_iterate_active_interfaces_rtnl(
683 struct ieee80211_hw *hw, u32 iter_flags,
684 void (*iterator)(void *data, u8 *mac,
685 struct ieee80211_vif *vif),
686 void *data)
687{
688 struct ieee80211_local *local = hw_to_local(hw);
689
690 ASSERT_RTNL();
691
692 __iterate_active_interfaces(local, iter_flags, iterator, data);
693}
694EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
695
Arik Nemtsov0fc1e042014-10-22 12:30:59 +0300696static void __iterate_stations(struct ieee80211_local *local,
697 void (*iterator)(void *data,
698 struct ieee80211_sta *sta),
699 void *data)
700{
701 struct sta_info *sta;
702
703 list_for_each_entry_rcu(sta, &local->sta_list, list) {
704 if (!sta->uploaded)
705 continue;
706
707 iterator(data, &sta->sta);
708 }
709}
710
711void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
712 void (*iterator)(void *data,
713 struct ieee80211_sta *sta),
714 void *data)
715{
716 struct ieee80211_local *local = hw_to_local(hw);
717
718 rcu_read_lock();
719 __iterate_stations(local, iterator, data);
720 rcu_read_unlock();
721}
722EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
723
Johannes Bergad7e7182013-11-13 13:37:47 +0100724struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
725{
726 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
727
728 if (!ieee80211_sdata_running(sdata) ||
729 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
730 return NULL;
731 return &sdata->vif;
732}
733EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
734
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400735/*
736 * Nothing should have been stuffed into the workqueue during
737 * the suspend->resume cycle. If this WARN is seen then there
738 * is a bug with either the driver suspend or something in
739 * mac80211 stuffing into the workqueue which we haven't yet
740 * cleared during mac80211's suspend cycle.
741 */
742static bool ieee80211_can_queue_work(struct ieee80211_local *local)
743{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100744 if (WARN(local->suspended && !local->resuming,
745 "queueing ieee80211 work while going to suspend\n"))
746 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400747
748 return true;
749}
750
751void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
752{
753 struct ieee80211_local *local = hw_to_local(hw);
754
755 if (!ieee80211_can_queue_work(local))
756 return;
757
758 queue_work(local->workqueue, work);
759}
760EXPORT_SYMBOL(ieee80211_queue_work);
761
762void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
763 struct delayed_work *dwork,
764 unsigned long delay)
765{
766 struct ieee80211_local *local = hw_to_local(hw);
767
768 if (!ieee80211_can_queue_work(local))
769 return;
770
771 queue_delayed_work(local->workqueue, dwork, delay);
772}
773EXPORT_SYMBOL(ieee80211_queue_delayed_work);
774
Johannes Berg35d865a2013-05-28 10:54:03 +0200775u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
Johannes Bergdd769862011-11-18 16:54:50 +0100776 struct ieee802_11_elems *elems,
777 u64 filter, u32 crc)
778{
779 size_t left = len;
Johannes Berg35d865a2013-05-28 10:54:03 +0200780 const u8 *pos = start;
Johannes Bergdd769862011-11-18 16:54:50 +0100781 bool calc_crc = filter != 0;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800782 DECLARE_BITMAP(seen_elems, 256);
Johannes Bergb2e506b2013-03-26 14:54:16 +0100783 const u8 *ie;
Johannes Bergdd769862011-11-18 16:54:50 +0100784
Paul Stewartfcff4f12012-02-23 17:59:53 -0800785 bitmap_zero(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100786 memset(elems, 0, sizeof(*elems));
787 elems->ie_start = start;
788 elems->total_len = len;
789
790 while (left >= 2) {
791 u8 id, elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800792 bool elem_parse_failed;
Johannes Bergdd769862011-11-18 16:54:50 +0100793
794 id = *pos++;
795 elen = *pos++;
796 left -= 2;
797
Paul Stewartfcff4f12012-02-23 17:59:53 -0800798 if (elen > left) {
799 elems->parse_error = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100800 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800801 }
802
Johannes Berg9690fb12012-10-24 14:19:53 +0200803 switch (id) {
804 case WLAN_EID_SSID:
805 case WLAN_EID_SUPP_RATES:
806 case WLAN_EID_FH_PARAMS:
807 case WLAN_EID_DS_PARAMS:
808 case WLAN_EID_CF_PARAMS:
809 case WLAN_EID_TIM:
810 case WLAN_EID_IBSS_PARAMS:
811 case WLAN_EID_CHALLENGE:
812 case WLAN_EID_RSN:
813 case WLAN_EID_ERP_INFO:
814 case WLAN_EID_EXT_SUPP_RATES:
815 case WLAN_EID_HT_CAPABILITY:
816 case WLAN_EID_HT_OPERATION:
817 case WLAN_EID_VHT_CAPABILITY:
818 case WLAN_EID_VHT_OPERATION:
819 case WLAN_EID_MESH_ID:
820 case WLAN_EID_MESH_CONFIG:
821 case WLAN_EID_PEER_MGMT:
822 case WLAN_EID_PREQ:
823 case WLAN_EID_PREP:
824 case WLAN_EID_PERR:
825 case WLAN_EID_RANN:
826 case WLAN_EID_CHANNEL_SWITCH:
827 case WLAN_EID_EXT_CHANSWITCH_ANN:
828 case WLAN_EID_COUNTRY:
829 case WLAN_EID_PWR_CONSTRAINT:
830 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg85220d72013-03-25 18:29:27 +0100831 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100832 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -0700833 case WLAN_EID_CHAN_SWITCH_PARAM:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100834 /*
835 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
836 * that if the content gets bigger it might be needed more than once
837 */
Johannes Berg9690fb12012-10-24 14:19:53 +0200838 if (test_bit(id, seen_elems)) {
839 elems->parse_error = true;
840 left -= elen;
841 pos += elen;
842 continue;
843 }
844 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800845 }
Johannes Bergdd769862011-11-18 16:54:50 +0100846
847 if (calc_crc && id < 64 && (filter & (1ULL << id)))
848 crc = crc32_be(crc, pos - 2, elen + 2);
849
Paul Stewartfcff4f12012-02-23 17:59:53 -0800850 elem_parse_failed = false;
851
Johannes Bergdd769862011-11-18 16:54:50 +0100852 switch (id) {
853 case WLAN_EID_SSID:
854 elems->ssid = pos;
855 elems->ssid_len = elen;
856 break;
857 case WLAN_EID_SUPP_RATES:
858 elems->supp_rates = pos;
859 elems->supp_rates_len = elen;
860 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100861 case WLAN_EID_DS_PARAMS:
Johannes Berg1cd8e882013-03-27 14:30:12 +0100862 if (elen >= 1)
863 elems->ds_params = pos;
864 else
865 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100866 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100867 case WLAN_EID_TIM:
868 if (elen >= sizeof(struct ieee80211_tim_ie)) {
869 elems->tim = (void *)pos;
870 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800871 } else
872 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100873 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100874 case WLAN_EID_CHALLENGE:
875 elems->challenge = pos;
876 elems->challenge_len = elen;
877 break;
878 case WLAN_EID_VENDOR_SPECIFIC:
879 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
880 pos[2] == 0xf2) {
881 /* Microsoft OUI (00:50:F2) */
882
883 if (calc_crc)
884 crc = crc32_be(crc, pos - 2, elen + 2);
885
Johannes Berg441a33b2013-02-12 16:27:04 +0100886 if (elen >= 5 && pos[3] == 2) {
Johannes Bergdd769862011-11-18 16:54:50 +0100887 /* OUI Type 2 - WMM IE */
888 if (pos[4] == 0) {
889 elems->wmm_info = pos;
890 elems->wmm_info_len = elen;
891 } else if (pos[4] == 1) {
892 elems->wmm_param = pos;
893 elems->wmm_param_len = elen;
894 }
895 }
896 }
897 break;
898 case WLAN_EID_RSN:
899 elems->rsn = pos;
900 elems->rsn_len = elen;
901 break;
902 case WLAN_EID_ERP_INFO:
Johannes Berg1946bed2013-03-27 14:31:53 +0100903 if (elen >= 1)
904 elems->erp_info = pos;
905 else
906 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100907 break;
908 case WLAN_EID_EXT_SUPP_RATES:
909 elems->ext_supp_rates = pos;
910 elems->ext_supp_rates_len = elen;
911 break;
912 case WLAN_EID_HT_CAPABILITY:
913 if (elen >= sizeof(struct ieee80211_ht_cap))
914 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800915 else
916 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100917 break;
Johannes Berg074d46d2012-03-15 19:45:16 +0100918 case WLAN_EID_HT_OPERATION:
919 if (elen >= sizeof(struct ieee80211_ht_operation))
920 elems->ht_operation = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800921 else
922 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100923 break;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000924 case WLAN_EID_VHT_CAPABILITY:
925 if (elen >= sizeof(struct ieee80211_vht_cap))
926 elems->vht_cap_elem = (void *)pos;
927 else
928 elem_parse_failed = true;
929 break;
930 case WLAN_EID_VHT_OPERATION:
931 if (elen >= sizeof(struct ieee80211_vht_operation))
932 elems->vht_operation = (void *)pos;
933 else
934 elem_parse_failed = true;
935 break;
Johannes Bergbee7f582013-02-07 22:24:55 +0100936 case WLAN_EID_OPMODE_NOTIF:
937 if (elen > 0)
938 elems->opmode_notif = pos;
939 else
940 elem_parse_failed = true;
941 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100942 case WLAN_EID_MESH_ID:
943 elems->mesh_id = pos;
944 elems->mesh_id_len = elen;
945 break;
946 case WLAN_EID_MESH_CONFIG:
947 if (elen >= sizeof(struct ieee80211_meshconf_ie))
948 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800949 else
950 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100951 break;
952 case WLAN_EID_PEER_MGMT:
953 elems->peering = pos;
954 elems->peering_len = elen;
955 break;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100956 case WLAN_EID_MESH_AWAKE_WINDOW:
957 if (elen >= 2)
958 elems->awake_window = (void *)pos;
959 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100960 case WLAN_EID_PREQ:
961 elems->preq = pos;
962 elems->preq_len = elen;
963 break;
964 case WLAN_EID_PREP:
965 elems->prep = pos;
966 elems->prep_len = elen;
967 break;
968 case WLAN_EID_PERR:
969 elems->perr = pos;
970 elems->perr_len = elen;
971 break;
972 case WLAN_EID_RANN:
973 if (elen >= sizeof(struct ieee80211_rann_ie))
974 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800975 else
976 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100977 break;
978 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +0200979 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
980 elem_parse_failed = true;
981 break;
982 }
983 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100984 break;
Johannes Bergb4f286a12013-03-26 14:13:58 +0100985 case WLAN_EID_EXT_CHANSWITCH_ANN:
986 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
987 elem_parse_failed = true;
988 break;
989 }
990 elems->ext_chansw_ie = (void *)pos;
991 break;
Johannes Berg85220d72013-03-25 18:29:27 +0100992 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
993 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
994 elem_parse_failed = true;
995 break;
996 }
997 elems->sec_chan_offs = (void *)pos;
998 break;
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -0700999 case WLAN_EID_CHAN_SWITCH_PARAM:
1000 if (elen !=
1001 sizeof(*elems->mesh_chansw_params_ie)) {
1002 elem_parse_failed = true;
1003 break;
1004 }
1005 elems->mesh_chansw_params_ie = (void *)pos;
1006 break;
Johannes Bergb2e506b2013-03-26 14:54:16 +01001007 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1008 if (!action ||
1009 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1010 elem_parse_failed = true;
1011 break;
1012 }
1013 elems->wide_bw_chansw_ie = (void *)pos;
1014 break;
1015 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1016 if (action) {
1017 elem_parse_failed = true;
1018 break;
1019 }
1020 /*
1021 * This is a bit tricky, but as we only care about
1022 * the wide bandwidth channel switch element, so
1023 * just parse it out manually.
1024 */
1025 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1026 pos, elen);
1027 if (ie) {
1028 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1029 elems->wide_bw_chansw_ie =
1030 (void *)(ie + 2);
1031 else
1032 elem_parse_failed = true;
1033 }
1034 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001035 case WLAN_EID_COUNTRY:
1036 elems->country_elem = pos;
1037 elems->country_elem_len = elen;
1038 break;
1039 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +02001040 if (elen != 1) {
1041 elem_parse_failed = true;
1042 break;
1043 }
Johannes Bergdd769862011-11-18 16:54:50 +01001044 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +01001045 break;
Steinar H. Gundersonc8d65912014-09-03 06:48:37 -07001046 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1047 /* Lots of different options exist, but we only care
1048 * about the Dynamic Transmit Power Control element.
1049 * First check for the Cisco OUI, then for the DTPC
1050 * tag (0x00).
1051 */
1052 if (elen < 4) {
1053 elem_parse_failed = true;
1054 break;
1055 }
1056
1057 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1058 pos[2] != 0x96 || pos[3] != 0x00)
1059 break;
1060
1061 if (elen != 6) {
1062 elem_parse_failed = true;
1063 break;
1064 }
1065
1066 if (calc_crc)
1067 crc = crc32_be(crc, pos - 2, elen + 2);
1068
1069 elems->cisco_dtpc_elem = pos;
1070 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001071 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg79ba1d82013-03-27 14:38:07 +01001072 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1073 elems->timeout_int = (void *)pos;
1074 else
1075 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +01001076 break;
1077 default:
1078 break;
1079 }
1080
Paul Stewartfcff4f12012-02-23 17:59:53 -08001081 if (elem_parse_failed)
1082 elems->parse_error = true;
1083 else
Johannes Berg5df45692012-10-24 14:22:37 +02001084 __set_bit(id, seen_elems);
Paul Stewartfcff4f12012-02-23 17:59:53 -08001085
Johannes Bergdd769862011-11-18 16:54:50 +01001086 left -= elen;
1087 pos += elen;
1088 }
1089
Paul Stewartfcff4f12012-02-23 17:59:53 -08001090 if (left != 0)
1091 elems->parse_error = true;
1092
Johannes Bergdd769862011-11-18 16:54:50 +01001093 return crc;
1094}
1095
Johannes Berg3abead52012-03-02 15:56:59 +01001096void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1097 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +02001098{
1099 struct ieee80211_local *local = sdata->local;
1100 struct ieee80211_tx_queue_params qparam;
Johannes Berg55de9082012-07-26 17:24:39 +02001101 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg54bcbc62012-03-28 11:04:25 +02001102 int ac;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001103 bool use_11b, enable_qos;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001104 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
Johannes Bergaa837e12009-05-07 16:16:24 +02001105 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +02001106
1107 if (!local->ops->conf_tx)
1108 return;
1109
Johannes Berg54bcbc62012-03-28 11:04:25 +02001110 if (local->hw.queues < IEEE80211_NUM_ACS)
1111 return;
1112
Johannes Berg5825fe102008-09-09 12:56:01 +02001113 memset(&qparam, 0, sizeof(qparam));
1114
Johannes Berg55de9082012-07-26 17:24:39 +02001115 rcu_read_lock();
1116 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1117 use_11b = (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +01001118 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +02001119 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg55de9082012-07-26 17:24:39 +02001120 rcu_read_unlock();
Johannes Berg5825fe102008-09-09 12:56:01 +02001121
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001122 /*
1123 * By default disable QoS in STA mode for old access points, which do
1124 * not support 802.11e. New APs will provide proper queue parameters,
1125 * that we will configure later.
1126 */
1127 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1128
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001129 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1130
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001131 /* Set defaults according to 802.11-2007 Table 7-37 */
1132 aCWmax = 1023;
1133 if (use_11b)
1134 aCWmin = 31;
1135 else
1136 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +02001137
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001138 /* Confiure old 802.11b/g medium access rules. */
1139 qparam.cw_max = aCWmax;
1140 qparam.cw_min = aCWmin;
1141 qparam.txop = 0;
1142 qparam.aifs = 2;
1143
1144 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1145 /* Update if QoS is enabled. */
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001146 if (enable_qos) {
1147 switch (ac) {
1148 case IEEE80211_AC_BK:
1149 qparam.cw_max = aCWmax;
1150 qparam.cw_min = aCWmin;
1151 qparam.txop = 0;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001152 if (is_ocb)
1153 qparam.aifs = 9;
1154 else
1155 qparam.aifs = 7;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001156 break;
1157 /* never happens but let's not leave undefined */
1158 default:
1159 case IEEE80211_AC_BE:
1160 qparam.cw_max = aCWmax;
1161 qparam.cw_min = aCWmin;
1162 qparam.txop = 0;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001163 if (is_ocb)
1164 qparam.aifs = 6;
1165 else
1166 qparam.aifs = 3;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001167 break;
1168 case IEEE80211_AC_VI:
1169 qparam.cw_max = aCWmin;
1170 qparam.cw_min = (aCWmin + 1) / 2 - 1;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001171 if (is_ocb)
1172 qparam.txop = 0;
1173 else if (use_11b)
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001174 qparam.txop = 6016/32;
1175 else
1176 qparam.txop = 3008/32;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001177
1178 if (is_ocb)
1179 qparam.aifs = 3;
1180 else
1181 qparam.aifs = 2;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001182 break;
1183 case IEEE80211_AC_VO:
1184 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1185 qparam.cw_min = (aCWmin + 1) / 4 - 1;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001186 if (is_ocb)
1187 qparam.txop = 0;
1188 else if (use_11b)
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001189 qparam.txop = 3264/32;
1190 else
1191 qparam.txop = 1504/32;
1192 qparam.aifs = 2;
1193 break;
1194 }
Johannes Bergaa837e12009-05-07 16:16:24 +02001195 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001196
Kalle Valoab133152010-01-12 10:42:31 +02001197 qparam.uapsd = false;
1198
Johannes Berg54bcbc62012-03-28 11:04:25 +02001199 sdata->tx_conf[ac] = qparam;
1200 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +02001201 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001202
Johannes Bergf142c6b2012-06-18 20:07:15 +02001203 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1204 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001205 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +01001206 if (bss_notify)
1207 ieee80211_bss_info_change_notify(sdata,
1208 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +05301209 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001210}
Johannes Berge50db652008-09-09 15:07:09 +02001211
Johannes Berg46900292009-02-15 12:44:28 +01001212void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001213 u16 transaction, u16 auth_alg, u16 status,
Johannes Berg4a3cb702013-02-12 16:43:19 +01001214 const u8 *extra, size_t extra_len, const u8 *da,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001215 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1216 u32 tx_flags)
Johannes Berg46900292009-02-15 12:44:28 +01001217{
1218 struct ieee80211_local *local = sdata->local;
1219 struct sk_buff *skb;
1220 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +02001221 int err;
Johannes Berg46900292009-02-15 12:44:28 +01001222
Fred Zhou15e230a2013-09-24 10:33:01 +08001223 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
Max Stepanov744462a2014-06-10 20:00:08 +03001224 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1225 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
Joe Perchesd15b8452011-08-29 14:17:31 -07001226 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +01001227 return;
Joe Perchesd15b8452011-08-29 14:17:31 -07001228
Max Stepanov744462a2014-06-10 20:00:08 +03001229 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
Johannes Berg46900292009-02-15 12:44:28 +01001230
1231 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1232 memset(mgmt, 0, 24 + 6);
1233 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1234 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001235 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001236 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001237 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1238 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1239 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001240 mgmt->u.auth.status_code = cpu_to_le16(status);
Johannes Berg46900292009-02-15 12:44:28 +01001241 if (extra)
1242 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +01001243
Johannes Bergfffd0932009-07-08 14:22:54 +02001244 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1245 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1246 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1247 WARN_ON(err);
1248 }
1249
Johannes Berg1672c0e32013-01-29 15:02:27 +01001250 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1251 tx_flags;
Johannes Berg62ae67b2009-11-18 18:42:05 +01001252 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001253}
1254
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001255void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1256 const u8 *bssid, u16 stype, u16 reason,
1257 bool send_frame, u8 *frame_buf)
1258{
1259 struct ieee80211_local *local = sdata->local;
1260 struct sk_buff *skb;
1261 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1262
1263 /* build frame */
1264 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1265 mgmt->duration = 0; /* initialize only */
1266 mgmt->seq_ctrl = 0; /* initialize only */
1267 memcpy(mgmt->da, bssid, ETH_ALEN);
1268 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1269 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1270 /* u.deauth.reason_code == u.disassoc.reason_code */
1271 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1272
1273 if (send_frame) {
1274 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1275 IEEE80211_DEAUTH_FRAME_LEN);
1276 if (!skb)
1277 return;
1278
1279 skb_reserve(skb, local->hw.extra_tx_headroom);
1280
1281 /* copy in frame */
1282 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1283 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1284
1285 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1286 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1287 IEEE80211_SKB_CB(skb)->flags |=
1288 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1289
1290 ieee80211_tx_skb(sdata, skb);
1291 }
1292}
1293
David Spinadelc56ef672014-02-05 15:21:13 +02001294static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1295 u8 *buffer, size_t buffer_len,
1296 const u8 *ie, size_t ie_len,
1297 enum ieee80211_band band,
1298 u32 rate_mask,
1299 struct cfg80211_chan_def *chandef,
1300 size_t *offset)
Johannes Bergde95a542009-04-01 11:58:36 +02001301{
1302 struct ieee80211_supported_band *sband;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001303 u8 *pos = buffer, *end = buffer + buffer_len;
David Spinadelc56ef672014-02-05 15:21:13 +02001304 size_t noffset;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001305 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001306 u8 rates[32];
1307 int num_rates;
1308 int ext_rates_len;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001309 int shift;
1310 u32 rate_flags;
Johannes Bergde95a542009-04-01 11:58:36 +02001311
David Spinadelc56ef672014-02-05 15:21:13 +02001312 *offset = 0;
1313
Johannes Berg4d36ec582009-10-27 20:59:55 +01001314 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001315 if (WARN_ON_ONCE(!sband))
1316 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001317
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001318 rate_flags = ieee80211_chandef_rate_flags(chandef);
1319 shift = ieee80211_chandef_get_shift(chandef);
1320
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001321 num_rates = 0;
1322 for (i = 0; i < sband->n_bitrates; i++) {
1323 if ((BIT(i) & rate_mask) == 0)
1324 continue; /* skip rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001325 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1326 continue;
1327
1328 rates[num_rates++] =
1329 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1330 (1 << shift) * 5);
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001331 }
1332
1333 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001334
Johannes Bergc604b9f2012-11-29 12:45:18 +01001335 if (end - pos < 2 + supp_rates_len)
1336 goto out_err;
Johannes Bergde95a542009-04-01 11:58:36 +02001337 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001338 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001339 memcpy(pos, rates, supp_rates_len);
1340 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001341
Johannes Berg8e664fb2009-12-23 13:15:38 +01001342 /* insert "request information" if in custom IEs */
1343 if (ie && ie_len) {
1344 static const u8 before_extrates[] = {
1345 WLAN_EID_SSID,
1346 WLAN_EID_SUPP_RATES,
1347 WLAN_EID_REQUEST,
1348 };
1349 noffset = ieee80211_ie_split(ie, ie_len,
1350 before_extrates,
1351 ARRAY_SIZE(before_extrates),
David Spinadelc56ef672014-02-05 15:21:13 +02001352 *offset);
1353 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001354 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001355 memcpy(pos, ie + *offset, noffset - *offset);
1356 pos += noffset - *offset;
1357 *offset = noffset;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001358 }
Johannes Bergde95a542009-04-01 11:58:36 +02001359
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001360 ext_rates_len = num_rates - supp_rates_len;
1361 if (ext_rates_len > 0) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001362 if (end - pos < 2 + ext_rates_len)
1363 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001364 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001365 *pos++ = ext_rates_len;
1366 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1367 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001368 }
1369
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001370 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001371 if (end - pos < 3)
1372 goto out_err;
Jouni Malinen651b5222010-08-28 19:37:51 +03001373 *pos++ = WLAN_EID_DS_PARAMS;
1374 *pos++ = 1;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001375 *pos++ = ieee80211_frequency_to_channel(
1376 chandef->chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001377 }
1378
Johannes Berg8e664fb2009-12-23 13:15:38 +01001379 /* insert custom IEs that go before HT */
1380 if (ie && ie_len) {
1381 static const u8 before_ht[] = {
1382 WLAN_EID_SSID,
1383 WLAN_EID_SUPP_RATES,
1384 WLAN_EID_REQUEST,
1385 WLAN_EID_EXT_SUPP_RATES,
1386 WLAN_EID_DS_PARAMS,
1387 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1388 };
1389 noffset = ieee80211_ie_split(ie, ie_len,
1390 before_ht, ARRAY_SIZE(before_ht),
David Spinadelc56ef672014-02-05 15:21:13 +02001391 *offset);
1392 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001393 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001394 memcpy(pos, ie + *offset, noffset - *offset);
1395 pos += noffset - *offset;
1396 *offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001397 }
1398
Johannes Bergc604b9f2012-11-29 12:45:18 +01001399 if (sband->ht_cap.ht_supported) {
1400 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1401 goto out_err;
Ben Greearef96a8422011-11-18 11:32:00 -08001402 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1403 sband->ht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001404 }
Johannes Berg5ef2d412009-03-31 12:12:07 +02001405
Johannes Bergde95a542009-04-01 11:58:36 +02001406 /*
1407 * If adding more here, adjust code in main.c
1408 * that calculates local->scan_ies_len.
1409 */
1410
Johannes Berg4d952302014-02-04 09:48:34 +01001411 /* insert custom IEs that go before VHT */
Johannes Berg8e664fb2009-12-23 13:15:38 +01001412 if (ie && ie_len) {
Johannes Berg4d952302014-02-04 09:48:34 +01001413 static const u8 before_vht[] = {
1414 WLAN_EID_SSID,
1415 WLAN_EID_SUPP_RATES,
1416 WLAN_EID_REQUEST,
1417 WLAN_EID_EXT_SUPP_RATES,
1418 WLAN_EID_DS_PARAMS,
1419 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1420 WLAN_EID_HT_CAPABILITY,
1421 WLAN_EID_BSS_COEX_2040,
1422 WLAN_EID_EXT_CAPABILITY,
1423 WLAN_EID_SSID_LIST,
1424 WLAN_EID_CHANNEL_USAGE,
1425 WLAN_EID_INTERWORKING,
1426 /* mesh ID can't happen here */
1427 /* 60 GHz can't happen here right now */
1428 };
1429 noffset = ieee80211_ie_split(ie, ie_len,
1430 before_vht, ARRAY_SIZE(before_vht),
David Spinadelc56ef672014-02-05 15:21:13 +02001431 *offset);
1432 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001433 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001434 memcpy(pos, ie + *offset, noffset - *offset);
1435 pos += noffset - *offset;
1436 *offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001437 }
1438
Johannes Bergc604b9f2012-11-29 12:45:18 +01001439 if (sband->vht_cap.vht_supported) {
1440 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1441 goto out_err;
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001442 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1443 sband->vht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001444 }
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001445
Johannes Bergde95a542009-04-01 11:58:36 +02001446 return pos - buffer;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001447 out_err:
1448 WARN_ONCE(1, "not enough space for preq IEs\n");
1449 return pos - buffer;
Johannes Bergde95a542009-04-01 11:58:36 +02001450}
1451
David Spinadelc56ef672014-02-05 15:21:13 +02001452int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1453 size_t buffer_len,
1454 struct ieee80211_scan_ies *ie_desc,
1455 const u8 *ie, size_t ie_len,
1456 u8 bands_used, u32 *rate_masks,
1457 struct cfg80211_chan_def *chandef)
1458{
1459 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1460 int i;
1461
1462 memset(ie_desc, 0, sizeof(*ie_desc));
1463
1464 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1465 if (bands_used & BIT(i)) {
1466 pos += ieee80211_build_preq_ies_band(local,
1467 buffer + pos,
1468 buffer_len - pos,
1469 ie, ie_len, i,
1470 rate_masks[i],
1471 chandef,
1472 &custom_ie_offset);
1473 ie_desc->ies[i] = buffer + old_pos;
1474 ie_desc->len[i] = pos - old_pos;
1475 old_pos = pos;
1476 }
1477 }
1478
1479 /* add any remaining custom IEs */
1480 if (ie && ie_len) {
1481 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1482 "not enough space for preq custom IEs\n"))
1483 return pos;
1484 memcpy(buffer + pos, ie + custom_ie_offset,
1485 ie_len - custom_ie_offset);
1486 ie_desc->common_ies = buffer + pos;
1487 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1488 pos += ie_len - custom_ie_offset;
1489 }
1490
1491 return pos;
1492};
1493
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001494struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001495 u8 *dst, u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001496 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001497 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001498 const u8 *ie, size_t ie_len,
1499 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001500{
1501 struct ieee80211_local *local = sdata->local;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001502 struct cfg80211_chan_def chandef;
Johannes Berg46900292009-02-15 12:44:28 +01001503 struct sk_buff *skb;
1504 struct ieee80211_mgmt *mgmt;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001505 int ies_len;
David Spinadelc56ef672014-02-05 15:21:13 +02001506 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1507 struct ieee80211_scan_ies dummy_ie_desc;
Johannes Berg46900292009-02-15 12:44:28 +01001508
Paul Stewarta806c552011-06-23 09:00:11 -08001509 /*
1510 * Do not send DS Channel parameter for directed probe requests
1511 * in order to maximize the chance that we get a response. Some
1512 * badly-behaved APs don't respond when this parameter is included.
1513 */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001514 chandef.width = sdata->vif.bss_conf.chandef.width;
Paul Stewarta806c552011-06-23 09:00:11 -08001515 if (directed)
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001516 chandef.chan = NULL;
Paul Stewarta806c552011-06-23 09:00:11 -08001517 else
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001518 chandef.chan = chan;
Jouni Malinen651b5222010-08-28 19:37:51 +03001519
Kalle Valo7c12ce82010-01-05 20:16:44 +02001520 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001521 ssid, ssid_len, 100 + ie_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001522 if (!skb)
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001523 return NULL;
1524
David Spinadelc56ef672014-02-05 15:21:13 +02001525 rate_masks[chan->band] = ratemask;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001526 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
David Spinadelc56ef672014-02-05 15:21:13 +02001527 skb_tailroom(skb), &dummy_ie_desc,
1528 ie, ie_len, BIT(chan->band),
1529 rate_masks, &chandef);
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001530 skb_put(skb, ies_len);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001531
Johannes Berg46900292009-02-15 12:44:28 +01001532 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001533 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001534 memcpy(mgmt->da, dst, ETH_ALEN);
1535 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001536 }
Johannes Berg46900292009-02-15 12:44:28 +01001537
Johannes Berg62ae67b2009-11-18 18:42:05 +01001538 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001539
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001540 return skb;
1541}
1542
1543void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1544 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001545 const u8 *ie, size_t ie_len,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001546 u32 ratemask, bool directed, u32 tx_flags,
Johannes Berg55de9082012-07-26 17:24:39 +02001547 struct ieee80211_channel *channel, bool scan)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001548{
1549 struct sk_buff *skb;
1550
Johannes Bergfe94fe02012-07-30 12:26:34 +02001551 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001552 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001553 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301554 if (skb) {
Johannes Berg1672c0e32013-01-29 15:02:27 +01001555 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
Johannes Berg55de9082012-07-26 17:24:39 +02001556 if (scan)
1557 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1558 else
1559 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301560 }
Johannes Berg46900292009-02-15 12:44:28 +01001561}
1562
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001563u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
Johannes Berg46900292009-02-15 12:44:28 +01001564 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001565 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001566{
1567 struct ieee80211_supported_band *sband;
Johannes Berg46900292009-02-15 12:44:28 +01001568 size_t num_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001569 u32 supp_rates, rate_flags;
1570 int i, j, shift;
1571 sband = sdata->local->hw.wiphy->bands[band];
1572
1573 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1574 shift = ieee80211_vif_get_shift(&sdata->vif);
Johannes Berg46900292009-02-15 12:44:28 +01001575
Michal Kazior4ee73f32012-04-11 08:47:56 +02001576 if (WARN_ON(!sband))
1577 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001578
Johannes Berg46900292009-02-15 12:44:28 +01001579 num_rates = sband->n_bitrates;
1580 supp_rates = 0;
1581 for (i = 0; i < elems->supp_rates_len +
1582 elems->ext_supp_rates_len; i++) {
1583 u8 rate = 0;
1584 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001585 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001586 if (i < elems->supp_rates_len)
1587 rate = elems->supp_rates[i];
1588 else if (elems->ext_supp_rates)
1589 rate = elems->ext_supp_rates
1590 [i - elems->supp_rates_len];
1591 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001592 is_basic = !!(rate & 0x80);
1593
1594 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1595 continue;
1596
1597 for (j = 0; j < num_rates; j++) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001598 int brate;
1599 if ((rate_flags & sband->bitrates[j].flags)
1600 != rate_flags)
1601 continue;
1602
1603 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1604 1 << shift);
1605
1606 if (brate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001607 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001608 if (basic_rates && is_basic)
1609 *basic_rates |= BIT(j);
1610 }
1611 }
Johannes Berg46900292009-02-15 12:44:28 +01001612 }
1613 return supp_rates;
1614}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001615
Johannes Berg84f6a012009-08-20 20:02:20 +02001616void ieee80211_stop_device(struct ieee80211_local *local)
1617{
1618 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001619 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001620
1621 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001622
1623 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001624 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001625}
1626
Johannes Bergf6837ba2014-04-30 14:19:04 +02001627static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1628{
1629 struct ieee80211_sub_if_data *sdata;
1630 struct ieee80211_chanctx *ctx;
1631
1632 /*
1633 * We get here if during resume the device can't be restarted properly.
1634 * We might also get here if this happens during HW reset, which is a
1635 * slightly different situation and we need to drop all connections in
1636 * the latter case.
1637 *
1638 * Ask cfg80211 to turn off all interfaces, this will result in more
1639 * warnings but at least we'll then get into a clean stopped state.
1640 */
1641
1642 local->resuming = false;
1643 local->suspended = false;
1644 local->started = false;
1645
1646 /* scheduled scan clearly can't be running any more, but tell
1647 * cfg80211 and clear local state
1648 */
1649 ieee80211_sched_scan_end(local);
1650
1651 list_for_each_entry(sdata, &local->interfaces, list)
1652 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1653
1654 /* Mark channel contexts as not being in the driver any more to avoid
1655 * removing them from the driver during the shutdown process...
1656 */
1657 mutex_lock(&local->chanctx_mtx);
1658 list_for_each_entry(ctx, &local->chanctx_list, list)
1659 ctx->driver_present = false;
1660 mutex_unlock(&local->chanctx_mtx);
1661
1662 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1663}
1664
Stanislaw Gruszka153a5fc2013-02-28 10:55:30 +01001665static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1666 struct ieee80211_sub_if_data *sdata)
1667{
1668 struct ieee80211_chanctx_conf *conf;
1669 struct ieee80211_chanctx *ctx;
1670
1671 if (!local->use_chanctx)
1672 return;
1673
1674 mutex_lock(&local->chanctx_mtx);
1675 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1676 lockdep_is_held(&local->chanctx_mtx));
1677 if (conf) {
1678 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1679 drv_assign_vif_chanctx(local, sdata, ctx);
1680 }
1681 mutex_unlock(&local->chanctx_mtx);
1682}
1683
Johannes Bergf2753dd2009-04-14 10:09:24 +02001684int ieee80211_reconfig(struct ieee80211_local *local)
1685{
1686 struct ieee80211_hw *hw = &local->hw;
1687 struct ieee80211_sub_if_data *sdata;
Johannes Berg55de9082012-07-26 17:24:39 +02001688 struct ieee80211_chanctx *ctx;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001689 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001690 int res, i;
Johannes Bergd8881302013-01-10 23:55:33 +01001691 bool reconfig_due_to_wowlan = false;
David Spinadeld43c6b62013-12-08 21:48:57 +02001692 struct ieee80211_sub_if_data *sched_scan_sdata;
1693 bool sched_scan_stopped = false;
Johannes Bergd8881302013-01-10 23:55:33 +01001694
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001695#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001696 if (local->suspended)
1697 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001698
Johannes Bergeecc4802011-05-04 15:37:29 +02001699 if (local->wowlan) {
Johannes Bergeecc4802011-05-04 15:37:29 +02001700 res = drv_resume(local);
Johannes Berg27b3eb92013-08-07 20:11:55 +02001701 local->wowlan = false;
Johannes Bergeecc4802011-05-04 15:37:29 +02001702 if (res < 0) {
1703 local->resuming = false;
1704 return res;
1705 }
1706 if (res == 0)
1707 goto wake_up;
1708 WARN_ON(res > 1);
1709 /*
1710 * res is 1, which means the driver requested
1711 * to go through a regular reset on wakeup.
1712 */
Johannes Bergd8881302013-01-10 23:55:33 +01001713 reconfig_due_to_wowlan = true;
Johannes Bergeecc4802011-05-04 15:37:29 +02001714 }
1715#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001716 /* everything else happens only if HW was up & running */
1717 if (!local->open_count)
1718 goto wake_up;
1719
1720 /*
1721 * Upon resume hardware can sometimes be goofy due to
1722 * various platform / driver / bus issues, so restarting
1723 * the device may at times not work immediately. Propagate
1724 * the error.
1725 */
1726 res = drv_start(local);
1727 if (res) {
Johannes Bergf6837ba2014-04-30 14:19:04 +02001728 if (local->suspended)
1729 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1730 else
1731 WARN(1, "Hardware became unavailable during restart.\n");
1732 ieee80211_handle_reconfig_failure(local);
Johannes Berg94f9b972011-07-14 16:48:54 +02001733 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001734 }
1735
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301736 /* setup fragmentation threshold */
1737 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1738
1739 /* setup RTS threshold */
1740 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1741
1742 /* reset coverage class */
1743 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1744
Johannes Berg94f9b972011-07-14 16:48:54 +02001745 ieee80211_led_radio(local, true);
1746 ieee80211_mod_tpt_led_trig(local,
1747 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1748
Johannes Bergf2753dd2009-04-14 10:09:24 +02001749 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001750 sdata = rtnl_dereference(local->monitor_sdata);
1751 if (sdata) {
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001752 /* in HW restart it exists already */
1753 WARN_ON(local->resuming);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001754 res = drv_add_interface(local, sdata);
1755 if (WARN_ON(res)) {
Monam Agarwal0c2bef462014-03-24 00:51:43 +05301756 RCU_INIT_POINTER(local->monitor_sdata, NULL);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001757 synchronize_net();
1758 kfree(sdata);
1759 }
1760 }
1761
Johannes Bergf2753dd2009-04-14 10:09:24 +02001762 list_for_each_entry(sdata, &local->interfaces, list) {
1763 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1764 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001765 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001766 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001767 }
1768
Johannes Berg55de9082012-07-26 17:24:39 +02001769 /* add channel contexts */
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001770 if (local->use_chanctx) {
1771 mutex_lock(&local->chanctx_mtx);
1772 list_for_each_entry(ctx, &local->chanctx_list, list)
Michal Kazior5bcae312014-06-25 12:35:06 +02001773 if (ctx->replace_state !=
1774 IEEE80211_CHANCTX_REPLACES_OTHER)
1775 WARN_ON(drv_add_chanctx(local, ctx));
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001776 mutex_unlock(&local->chanctx_mtx);
Johannes Berg55de9082012-07-26 17:24:39 +02001777
Zhao, Gang7df180f2014-04-26 09:43:40 +08001778 list_for_each_entry(sdata, &local->interfaces, list) {
1779 if (!ieee80211_sdata_running(sdata))
1780 continue;
1781 ieee80211_assign_chanctx(local, sdata);
1782 }
Johannes Berg6352c872012-11-07 12:40:41 +01001783
Zhao, Gang7df180f2014-04-26 09:43:40 +08001784 sdata = rtnl_dereference(local->monitor_sdata);
1785 if (sdata && ieee80211_sdata_running(sdata))
1786 ieee80211_assign_chanctx(local, sdata);
1787 }
Johannes Bergfe5f2552012-11-19 22:19:08 +01001788
Johannes Bergf2753dd2009-04-14 10:09:24 +02001789 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001790 mutex_lock(&local->sta_mtx);
1791 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001792 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001793
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001794 if (!sta->uploaded)
1795 continue;
1796
1797 /* AP-mode stations will be added later */
1798 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1799 continue;
1800
1801 for (state = IEEE80211_STA_NOTEXIST;
1802 state < sta->sta_state; state++)
1803 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1804 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001805 }
Johannes Berg34e89502010-02-03 13:59:58 +01001806 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001807
Eliad Peller2683d652011-07-14 20:29:42 +03001808 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001809 if (hw->queues >= IEEE80211_NUM_ACS) {
1810 list_for_each_entry(sdata, &local->interfaces, list) {
1811 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1812 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1813 !ieee80211_sdata_running(sdata))
1814 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001815
Johannes Berg54bcbc62012-03-28 11:04:25 +02001816 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1817 drv_conf_tx(local, sdata, i,
1818 &sdata->tx_conf[i]);
1819 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001820 }
Eliad Peller2683d652011-07-14 20:29:42 +03001821
Johannes Bergf2753dd2009-04-14 10:09:24 +02001822 /* reconfigure hardware */
1823 ieee80211_hw_config(local, ~0);
1824
Johannes Bergf2753dd2009-04-14 10:09:24 +02001825 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001826
1827 /* Finally also reconfigure all the BSS information */
1828 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001829 u32 changed;
1830
Johannes Berg9607e6b2009-12-23 13:15:31 +01001831 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001832 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001833
1834 /* common change flags for all interface types */
1835 changed = BSS_CHANGED_ERP_CTS_PROT |
1836 BSS_CHANGED_ERP_PREAMBLE |
1837 BSS_CHANGED_ERP_SLOT |
1838 BSS_CHANGED_HT |
1839 BSS_CHANGED_BASIC_RATES |
1840 BSS_CHANGED_BEACON_INT |
1841 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001842 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001843 BSS_CHANGED_QOS |
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001844 BSS_CHANGED_IDLE |
1845 BSS_CHANGED_TXPOWER;
Johannes Bergac8dd502010-05-05 09:44:02 +02001846
Johannes Bergf2753dd2009-04-14 10:09:24 +02001847 switch (sdata->vif.type) {
1848 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001849 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001850 BSS_CHANGED_ARP_FILTER |
1851 BSS_CHANGED_PS;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001852
Alexander Bondar989c6502013-05-16 17:34:17 +03001853 /* Re-send beacon info report to the driver */
1854 if (sdata->u.mgd.have_beacon)
1855 changed |= BSS_CHANGED_BEACON_INFO;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001856
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001857 sdata_lock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001858 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001859 sdata_unlock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001860 break;
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001861 case NL80211_IFTYPE_OCB:
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001862 changed |= BSS_CHANGED_OCB;
1863 ieee80211_bss_info_change_notify(sdata, changed);
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001864 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001865 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001866 changed |= BSS_CHANGED_IBSS;
1867 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001868 case NL80211_IFTYPE_AP:
Johannes Berg339afbf2012-11-14 15:21:17 +01001869 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001870
Johannes Berg10416382012-10-19 15:44:42 +02001871 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001872 changed |= BSS_CHANGED_AP_PROBE_RESP;
1873
Johannes Berg10416382012-10-19 15:44:42 +02001874 if (rcu_access_pointer(sdata->u.ap.beacon))
1875 drv_start_ap(local, sdata);
1876 }
1877
Arik Nemtsov78274932011-09-04 11:11:32 +03001878 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001879 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg8da34932012-12-14 14:17:26 +01001880 if (sdata->vif.bss_conf.enable_beacon) {
1881 changed |= BSS_CHANGED_BEACON |
1882 BSS_CHANGED_BEACON_ENABLED;
1883 ieee80211_bss_info_change_notify(sdata, changed);
1884 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001885 break;
1886 case NL80211_IFTYPE_WDS:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001887 case NL80211_IFTYPE_AP_VLAN:
1888 case NL80211_IFTYPE_MONITOR:
Johannes Berg98104fde2012-06-16 00:19:54 +02001889 case NL80211_IFTYPE_P2P_DEVICE:
Zhao, Gangb2057862014-04-26 09:43:41 +08001890 /* nothing to do */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001891 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001892 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001893 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001894 case NL80211_IFTYPE_P2P_CLIENT:
1895 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001896 WARN_ON(1);
1897 break;
1898 }
1899 }
1900
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001901 ieee80211_recalc_ps(local, -1);
1902
Johannes Berg2a419052010-06-10 10:21:29 +02001903 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001904 * The sta might be in psm against the ap (e.g. because
1905 * this was the state before a hw restart), so we
1906 * explicitly send a null packet in order to make sure
1907 * it'll sync against the ap (and get out of psm).
1908 */
1909 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1910 list_for_each_entry(sdata, &local->interfaces, list) {
1911 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1912 continue;
Johannes Berg20f544e2012-11-08 14:06:28 +01001913 if (!sdata->u.mgd.associated)
1914 continue;
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001915
1916 ieee80211_send_nullfunc(local, sdata, 0);
1917 }
1918 }
1919
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001920 /* APs are now beaconing, add back stations */
1921 mutex_lock(&local->sta_mtx);
1922 list_for_each_entry(sta, &local->sta_list, list) {
1923 enum ieee80211_sta_state state;
1924
1925 if (!sta->uploaded)
1926 continue;
1927
1928 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1929 continue;
1930
1931 for (state = IEEE80211_STA_NOTEXIST;
1932 state < sta->sta_state; state++)
1933 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1934 state + 1));
1935 }
1936 mutex_unlock(&local->sta_mtx);
1937
Eyal Shapira7b21aea2012-05-29 02:00:22 -07001938 /* add back keys */
1939 list_for_each_entry(sdata, &local->interfaces, list)
1940 if (ieee80211_sdata_running(sdata))
1941 ieee80211_enable_keys(sdata);
1942
Eliad Pellerc6209482012-07-02 15:08:25 +03001943 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03001944 local->in_reconfig = false;
1945 barrier();
1946
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001947 if (local->monitors == local->open_count && local->monitors > 0)
1948 ieee80211_add_virtual_monitor(local);
1949
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001950 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001951 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1952 * sessions can be established after a resume.
1953 *
1954 * Also tear down aggregation sessions since reconfiguring
1955 * them in a hardware restart scenario is not easily done
1956 * right now, and the hardware will have lost information
1957 * about the sessions, but we and the AP still think they
1958 * are active. This is really a workaround though.
1959 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001960 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001961 mutex_lock(&local->sta_mtx);
1962
1963 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergc82c4a82012-07-18 13:31:31 +02001964 ieee80211_sta_tear_down_BA_sessions(
1965 sta, AGG_STOP_LOCAL_REQUEST);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001966 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001967 }
Johannes Berg2a419052010-06-10 10:21:29 +02001968
1969 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001970 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001971
Johannes Berg445ea4e2013-02-13 12:25:28 +01001972 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +03001973 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1974 false);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001975
Johannes Berg5bb644a2009-05-17 11:40:42 +02001976 /*
Arik Nemtsov32769812014-02-11 12:27:19 +02001977 * Reconfigure sched scan if it was interrupted by FW restart or
1978 * suspend.
1979 */
1980 mutex_lock(&local->mtx);
1981 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1982 lockdep_is_held(&local->mtx));
1983 if (sched_scan_sdata && local->sched_scan_req)
1984 /*
1985 * Sched scan stopped, but we don't want to report it. Instead,
1986 * we're trying to reschedule.
1987 */
1988 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1989 local->sched_scan_req))
1990 sched_scan_stopped = true;
1991 mutex_unlock(&local->mtx);
1992
1993 if (sched_scan_stopped)
Eliad Pellere669ba22014-04-30 16:14:24 +03001994 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
Arik Nemtsov32769812014-02-11 12:27:19 +02001995
1996 /*
Johannes Berg5bb644a2009-05-17 11:40:42 +02001997 * If this is for hw restart things are still running.
1998 * We may want to change that later, however.
1999 */
Johannes Berg8f21b0a2013-01-11 00:28:01 +01002000 if (!local->suspended || reconfig_due_to_wowlan)
Johannes Berg9214ad72012-11-06 19:18:13 +01002001 drv_restart_complete(local);
Johannes Berg8f21b0a2013-01-11 00:28:01 +01002002
2003 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02002004 return 0;
2005
2006#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01002007 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02002008 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01002009 mb();
2010 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02002011
Johannes Bergb8360ab2013-04-29 14:57:44 +02002012 list_for_each_entry(sdata, &local->interfaces, list) {
2013 if (!ieee80211_sdata_running(sdata))
2014 continue;
2015 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2016 ieee80211_sta_restart(sdata);
2017 }
2018
Johannes Berg26d59532011-04-01 13:52:48 +02002019 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02002020#else
2021 WARN_ON(1);
2022#endif
David Spinadeld43c6b62013-12-08 21:48:57 +02002023
Johannes Bergf2753dd2009-04-14 10:09:24 +02002024 return 0;
2025}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002026
Johannes Berg95acac62011-07-12 12:30:59 +02002027void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2028{
2029 struct ieee80211_sub_if_data *sdata;
2030 struct ieee80211_local *local;
2031 struct ieee80211_key *key;
2032
2033 if (WARN_ON(!vif))
2034 return;
2035
2036 sdata = vif_to_sdata(vif);
2037 local = sdata->local;
2038
2039 if (WARN_ON(!local->resuming))
2040 return;
2041
2042 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2043 return;
2044
2045 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2046
2047 mutex_lock(&local->key_mtx);
2048 list_for_each_entry(key, &sdata->key_list, list)
2049 key->flags |= KEY_FLAG_TAINTED;
2050 mutex_unlock(&local->key_mtx);
2051}
2052EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2053
Johannes Berg04ecd252012-09-11 14:34:12 +02002054void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
Johannes Berg0f782312009-12-01 13:37:02 +01002055{
Johannes Berg04ecd252012-09-11 14:34:12 +02002056 struct ieee80211_local *local = sdata->local;
2057 struct ieee80211_chanctx_conf *chanctx_conf;
2058 struct ieee80211_chanctx *chanctx;
Johannes Berg0f782312009-12-01 13:37:02 +01002059
Johannes Berg04ecd252012-09-11 14:34:12 +02002060 mutex_lock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01002061
Johannes Berg04ecd252012-09-11 14:34:12 +02002062 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2063 lockdep_is_held(&local->chanctx_mtx));
Johannes Berg0f782312009-12-01 13:37:02 +01002064
Johannes Berg04ecd252012-09-11 14:34:12 +02002065 if (WARN_ON_ONCE(!chanctx_conf))
Johannes Berg5d8e4232012-09-11 10:17:11 +02002066 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01002067
Johannes Berg04ecd252012-09-11 14:34:12 +02002068 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2069 ieee80211_recalc_smps_chanctx(local, chanctx);
Johannes Berg5d8e4232012-09-11 10:17:11 +02002070 unlock:
Johannes Berg04ecd252012-09-11 14:34:12 +02002071 mutex_unlock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01002072}
Johannes Berg8e664fb2009-12-23 13:15:38 +01002073
Eliad Peller21f659b2013-11-11 20:14:01 +02002074void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2075{
2076 struct ieee80211_local *local = sdata->local;
2077 struct ieee80211_chanctx_conf *chanctx_conf;
2078 struct ieee80211_chanctx *chanctx;
2079
2080 mutex_lock(&local->chanctx_mtx);
2081
2082 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2083 lockdep_is_held(&local->chanctx_mtx));
2084
2085 if (WARN_ON_ONCE(!chanctx_conf))
2086 goto unlock;
2087
2088 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2089 ieee80211_recalc_chanctx_min_def(local, chanctx);
2090 unlock:
2091 mutex_unlock(&local->chanctx_mtx);
2092}
2093
Johannes Berg8e664fb2009-12-23 13:15:38 +01002094static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2095{
2096 int i;
2097
2098 for (i = 0; i < n_ids; i++)
2099 if (ids[i] == id)
2100 return true;
2101 return false;
2102}
2103
Johannes Berg8e664fb2009-12-23 13:15:38 +01002104size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2105 const u8 *ids, int n_ids, size_t offset)
2106{
2107 size_t pos = offset;
2108
2109 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
2110 pos += 2 + ies[pos + 1];
2111
2112 return pos;
2113}
Andrei Otcheretianskia7f3a762014-10-22 15:22:49 +03002114EXPORT_SYMBOL(ieee80211_ie_split);
Johannes Berg8e664fb2009-12-23 13:15:38 +01002115
2116size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2117{
2118 size_t pos = offset;
2119
2120 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2121 pos += 2 + ies[pos + 1];
2122
2123 return pos;
2124}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07002125
2126static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2127 int rssi_min_thold,
2128 int rssi_max_thold)
2129{
2130 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2131
2132 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2133 return;
2134
2135 /*
2136 * Scale up threshold values before storing it, as the RSSI averaging
2137 * algorithm uses a scaled up value as well. Change this scaling
2138 * factor if the RSSI averaging algorithm changes.
2139 */
2140 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2141 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2142}
2143
2144void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2145 int rssi_min_thold,
2146 int rssi_max_thold)
2147{
2148 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2149
2150 WARN_ON(rssi_min_thold == rssi_max_thold ||
2151 rssi_min_thold > rssi_max_thold);
2152
2153 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2154 rssi_max_thold);
2155}
2156EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2157
2158void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2159{
2160 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2161
2162 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2163}
2164EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03002165
Ben Greearef96a8422011-11-18 11:32:00 -08002166u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07002167 u16 cap)
2168{
2169 __le16 tmp;
2170
2171 *pos++ = WLAN_EID_HT_CAPABILITY;
2172 *pos++ = sizeof(struct ieee80211_ht_cap);
2173 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2174
2175 /* capability flags */
2176 tmp = cpu_to_le16(cap);
2177 memcpy(pos, &tmp, sizeof(u16));
2178 pos += sizeof(u16);
2179
2180 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08002181 *pos++ = ht_cap->ampdu_factor |
2182 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07002183 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2184
2185 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08002186 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2187 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002188
2189 /* extended capabilities */
2190 pos += sizeof(__le16);
2191
2192 /* BF capabilities */
2193 pos += sizeof(__le32);
2194
2195 /* antenna selection */
2196 pos += sizeof(u8);
2197
2198 return pos;
2199}
2200
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00002201u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
Johannes Bergcc3983d2012-12-07 12:45:06 +01002202 u32 cap)
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00002203{
2204 __le32 tmp;
2205
2206 *pos++ = WLAN_EID_VHT_CAPABILITY;
Mahesh Palivelad4950282012-10-10 11:25:40 +00002207 *pos++ = sizeof(struct ieee80211_vht_cap);
2208 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00002209
2210 /* capability flags */
2211 tmp = cpu_to_le32(cap);
2212 memcpy(pos, &tmp, sizeof(u32));
2213 pos += sizeof(u32);
2214
2215 /* VHT MCS set */
2216 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2217 pos += sizeof(vht_cap->vht_mcs);
2218
2219 return pos;
2220}
2221
Johannes Berg074d46d2012-03-15 19:45:16 +01002222u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Johannes Berg4bf88532012-11-09 11:39:59 +01002223 const struct cfg80211_chan_def *chandef,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002224 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002225{
Johannes Berg074d46d2012-03-15 19:45:16 +01002226 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002227 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01002228 *pos++ = WLAN_EID_HT_OPERATION;
2229 *pos++ = sizeof(struct ieee80211_ht_operation);
2230 ht_oper = (struct ieee80211_ht_operation *)pos;
Johannes Berg4bf88532012-11-09 11:39:59 +01002231 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2232 chandef->chan->center_freq);
2233 switch (chandef->width) {
2234 case NL80211_CHAN_WIDTH_160:
2235 case NL80211_CHAN_WIDTH_80P80:
2236 case NL80211_CHAN_WIDTH_80:
2237 case NL80211_CHAN_WIDTH_40:
2238 if (chandef->center_freq1 > chandef->chan->center_freq)
2239 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2240 else
2241 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002242 break;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002243 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01002244 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002245 break;
2246 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07002247 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
Johannes Berg4bf88532012-11-09 11:39:59 +01002248 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2249 chandef->width != NL80211_CHAN_WIDTH_20)
Johannes Berg074d46d2012-03-15 19:45:16 +01002250 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01002251
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002252 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01002253 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002254
2255 /* It seems that Basic MCS set and Supported MCS set
2256 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01002257 memset(&ht_oper->basic_set, 0, 16);
2258 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002259
Johannes Berg074d46d2012-03-15 19:45:16 +01002260 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002261}
2262
Johannes Berg4bf88532012-11-09 11:39:59 +01002263void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
Johannes Berg4a3cb702013-02-12 16:43:19 +01002264 const struct ieee80211_ht_operation *ht_oper,
Johannes Berg4bf88532012-11-09 11:39:59 +01002265 struct cfg80211_chan_def *chandef)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002266{
2267 enum nl80211_channel_type channel_type;
2268
Johannes Berg4bf88532012-11-09 11:39:59 +01002269 if (!ht_oper) {
2270 cfg80211_chandef_create(chandef, control_chan,
2271 NL80211_CHAN_NO_HT);
2272 return;
2273 }
Alexander Simon42e7aa72011-10-26 14:47:26 -07002274
Johannes Berg074d46d2012-03-15 19:45:16 +01002275 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07002276 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2277 channel_type = NL80211_CHAN_HT20;
2278 break;
2279 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2280 channel_type = NL80211_CHAN_HT40PLUS;
2281 break;
2282 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2283 channel_type = NL80211_CHAN_HT40MINUS;
2284 break;
2285 default:
2286 channel_type = NL80211_CHAN_NO_HT;
2287 }
2288
Johannes Berg4bf88532012-11-09 11:39:59 +01002289 cfg80211_chandef_create(chandef, control_chan, channel_type);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002290}
2291
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002292int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2293 const struct ieee80211_supported_band *sband,
2294 const u8 *srates, int srates_len, u32 *rates)
2295{
2296 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2297 int shift = ieee80211_chandef_get_shift(chandef);
2298 struct ieee80211_rate *br;
2299 int brate, rate, i, j, count = 0;
2300
2301 *rates = 0;
2302
2303 for (i = 0; i < srates_len; i++) {
2304 rate = srates[i] & 0x7f;
2305
2306 for (j = 0; j < sband->n_bitrates; j++) {
2307 br = &sband->bitrates[j];
2308 if ((rate_flags & br->flags) != rate_flags)
2309 continue;
2310
2311 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2312 if (brate == rate) {
2313 *rates |= BIT(j);
2314 count++;
2315 break;
2316 }
2317 }
2318 }
2319 return count;
2320}
2321
Johannes Bergfc8a7322012-06-28 10:33:25 +02002322int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002323 struct sk_buff *skb, bool need_basic,
2324 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03002325{
Arik Nemtsov768db342011-09-28 14:12:51 +03002326 struct ieee80211_local *local = sdata->local;
2327 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002328 int rate, shift;
Arik Nemtsov768db342011-09-28 14:12:51 +03002329 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002330 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002331 u32 rate_flags;
Arik Nemtsov768db342011-09-28 14:12:51 +03002332
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002333 shift = ieee80211_vif_get_shift(&sdata->vif);
2334 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
Johannes Berg6b778632012-07-23 14:53:27 +02002335 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002336 rates = 0;
2337 for (i = 0; i < sband->n_bitrates; i++) {
2338 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2339 continue;
2340 rates++;
2341 }
Arik Nemtsov768db342011-09-28 14:12:51 +03002342 if (rates > 8)
2343 rates = 8;
2344
2345 if (skb_tailroom(skb) < rates + 2)
2346 return -ENOMEM;
2347
2348 pos = skb_put(skb, rates + 2);
2349 *pos++ = WLAN_EID_SUPP_RATES;
2350 *pos++ = rates;
2351 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002352 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002353 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2354 continue;
2355
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002356 if (need_basic && basic_rates & BIT(i))
2357 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03002358 rate = sband->bitrates[i].bitrate;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002359 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2360 5 * (1 << shift));
2361 *pos++ = basic | (u8) rate;
Arik Nemtsov768db342011-09-28 14:12:51 +03002362 }
2363
2364 return 0;
2365}
2366
Johannes Bergfc8a7322012-06-28 10:33:25 +02002367int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002368 struct sk_buff *skb, bool need_basic,
2369 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03002370{
Arik Nemtsov768db342011-09-28 14:12:51 +03002371 struct ieee80211_local *local = sdata->local;
2372 struct ieee80211_supported_band *sband;
Chun-Yeow Yeohcc63ec72013-09-07 23:40:44 -07002373 int rate, shift;
Arik Nemtsov768db342011-09-28 14:12:51 +03002374 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002375 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002376 u32 rate_flags;
2377
2378 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2379 shift = ieee80211_vif_get_shift(&sdata->vif);
Arik Nemtsov768db342011-09-28 14:12:51 +03002380
Johannes Berg6b778632012-07-23 14:53:27 +02002381 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002382 exrates = 0;
2383 for (i = 0; i < sband->n_bitrates; i++) {
2384 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2385 continue;
2386 exrates++;
2387 }
2388
Arik Nemtsov768db342011-09-28 14:12:51 +03002389 if (exrates > 8)
2390 exrates -= 8;
2391 else
2392 exrates = 0;
2393
2394 if (skb_tailroom(skb) < exrates + 2)
2395 return -ENOMEM;
2396
2397 if (exrates) {
2398 pos = skb_put(skb, exrates + 2);
2399 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2400 *pos++ = exrates;
2401 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002402 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002403 if ((rate_flags & sband->bitrates[i].flags)
2404 != rate_flags)
2405 continue;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002406 if (need_basic && basic_rates & BIT(i))
2407 basic = 0x80;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002408 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2409 5 * (1 << shift));
2410 *pos++ = basic | (u8) rate;
Arik Nemtsov768db342011-09-28 14:12:51 +03002411 }
2412 }
2413 return 0;
2414}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002415
2416int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2417{
2418 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2419 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2420
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07002421 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2422 /* non-managed type inferfaces */
2423 return 0;
2424 }
Emmanuel Grumbach3a7bba62013-03-20 17:05:45 +02002425 return ifmgd->ave_beacon_signal / 16;
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002426}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07002427EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
Johannes Berg04ecd252012-09-11 14:34:12 +02002428
2429u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2430{
2431 if (!mcs)
2432 return 1;
2433
2434 /* TODO: consider rx_highest */
2435
2436 if (mcs->rx_mask[3])
2437 return 4;
2438 if (mcs->rx_mask[2])
2439 return 3;
2440 if (mcs->rx_mask[1])
2441 return 2;
2442 return 1;
2443}
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002444
2445/**
2446 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2447 * @local: mac80211 hw info struct
2448 * @status: RX status
2449 * @mpdu_len: total MPDU length (including FCS)
2450 * @mpdu_offset: offset into MPDU to calculate timestamp at
2451 *
2452 * This function calculates the RX timestamp at the given MPDU offset, taking
2453 * into account what the RX timestamp was. An offset of 0 will just normalize
2454 * the timestamp to TSF at beginning of MPDU reception.
2455 */
2456u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2457 struct ieee80211_rx_status *status,
2458 unsigned int mpdu_len,
2459 unsigned int mpdu_offset)
2460{
2461 u64 ts = status->mactime;
2462 struct rate_info ri;
2463 u16 rate;
2464
2465 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2466 return 0;
2467
2468 memset(&ri, 0, sizeof(ri));
2469
2470 /* Fill cfg80211 rate info */
2471 if (status->flag & RX_FLAG_HT) {
2472 ri.mcs = status->rate_idx;
2473 ri.flags |= RATE_INFO_FLAGS_MCS;
2474 if (status->flag & RX_FLAG_40MHZ)
2475 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2476 if (status->flag & RX_FLAG_SHORT_GI)
2477 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Johannes Berg56146182012-11-09 15:07:02 +01002478 } else if (status->flag & RX_FLAG_VHT) {
2479 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2480 ri.mcs = status->rate_idx;
2481 ri.nss = status->vht_nss;
2482 if (status->flag & RX_FLAG_40MHZ)
2483 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002484 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002485 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002486 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002487 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002488 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002489 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2490 if (status->flag & RX_FLAG_SHORT_GI)
2491 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002492 } else {
2493 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002494 int shift = 0;
2495 int bitrate;
2496
2497 if (status->flag & RX_FLAG_10MHZ)
2498 shift = 1;
2499 if (status->flag & RX_FLAG_5MHZ)
2500 shift = 2;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002501
2502 sband = local->hw.wiphy->bands[status->band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002503 bitrate = sband->bitrates[status->rate_idx].bitrate;
2504 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002505 }
2506
2507 rate = cfg80211_calculate_bitrate(&ri);
Johannes Bergd86aa4f2013-10-11 15:47:06 +02002508 if (WARN_ONCE(!rate,
2509 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2510 status->flag, status->rate_idx, status->vht_nss))
2511 return 0;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002512
2513 /* rewind from end of MPDU */
2514 if (status->flag & RX_FLAG_MACTIME_END)
2515 ts -= mpdu_len * 8 * 10 / rate;
2516
2517 ts += mpdu_offset * 8 * 10 / rate;
2518
2519 return ts;
2520}
Simon Wunderlich164eb022013-02-08 18:16:20 +01002521
2522void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2523{
2524 struct ieee80211_sub_if_data *sdata;
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002525 struct cfg80211_chan_def chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002526
Johannes Berg34a37402013-12-18 09:43:33 +01002527 mutex_lock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002528 mutex_lock(&local->iflist_mtx);
2529 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg34a37402013-12-18 09:43:33 +01002530 /* it might be waiting for the local->mtx, but then
2531 * by the time it gets it, sdata->wdev.cac_started
2532 * will no longer be true
2533 */
2534 cancel_delayed_work(&sdata->dfs_cac_timer_work);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002535
2536 if (sdata->wdev.cac_started) {
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002537 chandef = sdata->vif.bss_conf.chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002538 ieee80211_vif_release_channel(sdata);
2539 cfg80211_cac_event(sdata->dev,
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002540 &chandef,
Simon Wunderlich164eb022013-02-08 18:16:20 +01002541 NL80211_RADAR_CAC_ABORTED,
2542 GFP_KERNEL);
2543 }
2544 }
2545 mutex_unlock(&local->iflist_mtx);
Johannes Berg34a37402013-12-18 09:43:33 +01002546 mutex_unlock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002547}
2548
2549void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2550{
2551 struct ieee80211_local *local =
2552 container_of(work, struct ieee80211_local, radar_detected_work);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002553 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
Michal Kazior486cf4c2014-10-10 12:43:23 +02002554 struct ieee80211_chanctx *ctx;
2555 int num_chanctx = 0;
2556
2557 mutex_lock(&local->chanctx_mtx);
2558 list_for_each_entry(ctx, &local->chanctx_list, list) {
2559 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2560 continue;
2561
2562 num_chanctx++;
2563 chandef = ctx->conf.def;
2564 }
2565 mutex_unlock(&local->chanctx_mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002566
2567 ieee80211_dfs_cac_cancel(local);
2568
Michal Kazior486cf4c2014-10-10 12:43:23 +02002569 if (num_chanctx > 1)
2570 /* XXX: multi-channel is not supported yet */
Simon Wunderlich164eb022013-02-08 18:16:20 +01002571 WARN_ON(1);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002572 else
Simon Wunderlich164eb022013-02-08 18:16:20 +01002573 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002574}
2575
2576void ieee80211_radar_detected(struct ieee80211_hw *hw)
2577{
2578 struct ieee80211_local *local = hw_to_local(hw);
2579
2580 trace_api_radar_detected(local);
2581
2582 ieee80211_queue_work(hw, &local->radar_detected_work);
2583}
2584EXPORT_SYMBOL(ieee80211_radar_detected);
Simon Wunderliche6b7cde2013-08-28 13:41:29 +02002585
2586u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2587{
2588 u32 ret;
2589 int tmp;
2590
2591 switch (c->width) {
2592 case NL80211_CHAN_WIDTH_20:
2593 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2594 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2595 break;
2596 case NL80211_CHAN_WIDTH_40:
2597 c->width = NL80211_CHAN_WIDTH_20;
2598 c->center_freq1 = c->chan->center_freq;
2599 ret = IEEE80211_STA_DISABLE_40MHZ |
2600 IEEE80211_STA_DISABLE_VHT;
2601 break;
2602 case NL80211_CHAN_WIDTH_80:
2603 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2604 /* n_P40 */
2605 tmp /= 2;
2606 /* freq_P40 */
2607 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2608 c->width = NL80211_CHAN_WIDTH_40;
2609 ret = IEEE80211_STA_DISABLE_VHT;
2610 break;
2611 case NL80211_CHAN_WIDTH_80P80:
2612 c->center_freq2 = 0;
2613 c->width = NL80211_CHAN_WIDTH_80;
2614 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2615 IEEE80211_STA_DISABLE_160MHZ;
2616 break;
2617 case NL80211_CHAN_WIDTH_160:
2618 /* n_P20 */
2619 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2620 /* n_P80 */
2621 tmp /= 4;
2622 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2623 c->width = NL80211_CHAN_WIDTH_80;
2624 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2625 IEEE80211_STA_DISABLE_160MHZ;
2626 break;
2627 default:
2628 case NL80211_CHAN_WIDTH_20_NOHT:
2629 WARN_ON_ONCE(1);
2630 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2631 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2632 break;
2633 case NL80211_CHAN_WIDTH_5:
2634 case NL80211_CHAN_WIDTH_10:
2635 WARN_ON_ONCE(1);
2636 /* keep c->width */
2637 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2638 break;
2639 }
2640
2641 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2642
2643 return ret;
2644}
Emmanuel Grumbach687da132013-10-01 16:45:43 +03002645
2646/*
2647 * Returns true if smps_mode_new is strictly more restrictive than
2648 * smps_mode_old.
2649 */
2650bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2651 enum ieee80211_smps_mode smps_mode_new)
2652{
2653 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2654 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2655 return false;
2656
2657 switch (smps_mode_old) {
2658 case IEEE80211_SMPS_STATIC:
2659 return false;
2660 case IEEE80211_SMPS_DYNAMIC:
2661 return smps_mode_new == IEEE80211_SMPS_STATIC;
2662 case IEEE80211_SMPS_OFF:
2663 return smps_mode_new != IEEE80211_SMPS_OFF;
2664 default:
2665 WARN_ON(1);
2666 }
2667
2668 return false;
2669}
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002670
2671int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2672 struct cfg80211_csa_settings *csa_settings)
2673{
2674 struct sk_buff *skb;
2675 struct ieee80211_mgmt *mgmt;
2676 struct ieee80211_local *local = sdata->local;
2677 int freq;
2678 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2679 sizeof(mgmt->u.action.u.chan_switch);
2680 u8 *pos;
2681
2682 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2683 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2684 return -EOPNOTSUPP;
2685
2686 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2687 5 + /* channel switch announcement element */
2688 3 + /* secondary channel offset element */
2689 8); /* mesh channel switch parameters element */
2690 if (!skb)
2691 return -ENOMEM;
2692
2693 skb_reserve(skb, local->tx_headroom);
2694 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2695 memset(mgmt, 0, hdr_len);
2696 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2697 IEEE80211_STYPE_ACTION);
2698
2699 eth_broadcast_addr(mgmt->da);
2700 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2701 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2702 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2703 } else {
2704 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2705 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2706 }
2707 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2708 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2709 pos = skb_put(skb, 5);
2710 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2711 *pos++ = 3; /* IE length */
2712 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2713 freq = csa_settings->chandef.chan->center_freq;
2714 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2715 *pos++ = csa_settings->count; /* count */
2716
2717 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2718 enum nl80211_channel_type ch_type;
2719
2720 skb_put(skb, 3);
2721 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2722 *pos++ = 1; /* IE length */
2723 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2724 if (ch_type == NL80211_CHAN_HT40PLUS)
2725 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2726 else
2727 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2728 }
2729
2730 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2731 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002732
2733 skb_put(skb, 8);
2734 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2735 *pos++ = 6; /* IE length */
2736 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2737 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2738 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2739 *pos++ |= csa_settings->block_tx ?
2740 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2741 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2742 pos += 2;
Chun-Yeow Yeohca91dc92013-11-12 10:31:48 +08002743 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002744 pos += 2;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002745 }
2746
2747 ieee80211_tx_skb(sdata, skb);
2748 return 0;
2749}
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002750
2751bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2752{
2753 return !(cs == NULL || cs->cipher == 0 ||
2754 cs->hdr_len < cs->pn_len + cs->pn_off ||
2755 cs->hdr_len <= cs->key_idx_off ||
2756 cs->key_idx_shift > 7 ||
2757 cs->key_idx_mask == 0);
2758}
2759
2760bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2761{
2762 int i;
2763
2764 /* Ensure we have enough iftype bitmap space for all iftype values */
2765 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2766
2767 for (i = 0; i < n; i++)
2768 if (!ieee80211_cs_valid(&cs[i]))
2769 return false;
2770
2771 return true;
2772}
2773
2774const struct ieee80211_cipher_scheme *
2775ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2776 enum nl80211_iftype iftype)
2777{
2778 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2779 int n = local->hw.n_cipher_schemes;
2780 int i;
2781 const struct ieee80211_cipher_scheme *cs = NULL;
2782
2783 for (i = 0; i < n; i++) {
2784 if (l[i].cipher == cipher) {
2785 cs = &l[i];
2786 break;
2787 }
2788 }
2789
2790 if (!cs || !(cs->iftype & BIT(iftype)))
2791 return NULL;
2792
2793 return cs;
2794}
2795
2796int ieee80211_cs_headroom(struct ieee80211_local *local,
2797 struct cfg80211_crypto_settings *crypto,
2798 enum nl80211_iftype iftype)
2799{
2800 const struct ieee80211_cipher_scheme *cs;
2801 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2802 int i;
2803
2804 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2805 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2806 iftype);
2807
2808 if (cs && headroom < cs->hdr_len)
2809 headroom = cs->hdr_len;
2810 }
2811
2812 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2813 if (cs && headroom < cs->hdr_len)
2814 headroom = cs->hdr_len;
2815
2816 return headroom;
2817}
Felix Fietkaua7022e62013-12-16 21:49:14 +01002818
2819static bool
2820ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2821{
2822 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2823 int skip;
2824
2825 if (end > 0)
2826 return false;
2827
2828 /* End time is in the past, check for repetitions */
2829 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2830 if (data->count[i] < 255) {
2831 if (data->count[i] <= skip) {
2832 data->count[i] = 0;
2833 return false;
2834 }
2835
2836 data->count[i] -= skip;
2837 }
2838
2839 data->desc[i].start += skip * data->desc[i].interval;
2840
2841 return true;
2842}
2843
2844static bool
2845ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2846 s32 *offset)
2847{
2848 bool ret = false;
2849 int i;
2850
2851 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2852 s32 cur;
2853
2854 if (!data->count[i])
2855 continue;
2856
2857 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2858 ret = true;
2859
2860 cur = data->desc[i].start - tsf;
2861 if (cur > *offset)
2862 continue;
2863
2864 cur = data->desc[i].start + data->desc[i].duration - tsf;
2865 if (cur > *offset)
2866 *offset = cur;
2867 }
2868
2869 return ret;
2870}
2871
2872static u32
2873ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2874{
2875 s32 offset = 0;
2876 int tries = 0;
2877 /*
2878 * arbitrary limit, used to avoid infinite loops when combined NoA
2879 * descriptors cover the full time period.
2880 */
2881 int max_tries = 5;
2882
2883 ieee80211_extend_absent_time(data, tsf, &offset);
2884 do {
2885 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2886 break;
2887
2888 tries++;
2889 } while (tries < max_tries);
2890
2891 return offset;
2892}
2893
2894void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2895{
2896 u32 next_offset = BIT(31) - 1;
2897 int i;
2898
2899 data->absent = 0;
2900 data->has_next_tsf = false;
2901 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2902 s32 start;
2903
2904 if (!data->count[i])
2905 continue;
2906
2907 ieee80211_extend_noa_desc(data, tsf, i);
2908 start = data->desc[i].start - tsf;
2909 if (start <= 0)
2910 data->absent |= BIT(i);
2911
2912 if (next_offset > start)
2913 next_offset = start;
2914
2915 data->has_next_tsf = true;
2916 }
2917
2918 if (data->absent)
2919 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2920
2921 data->next_tsf = tsf + next_offset;
2922}
2923EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2924
2925int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2926 struct ieee80211_noa_data *data, u32 tsf)
2927{
2928 int ret = 0;
2929 int i;
2930
2931 memset(data, 0, sizeof(*data));
2932
2933 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2934 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2935
2936 if (!desc->count || !desc->duration)
2937 continue;
2938
2939 data->count[i] = desc->count;
2940 data->desc[i].start = le32_to_cpu(desc->start_time);
2941 data->desc[i].duration = le32_to_cpu(desc->duration);
2942 data->desc[i].interval = le32_to_cpu(desc->interval);
2943
2944 if (data->count[i] > 1 &&
2945 data->desc[i].interval < data->desc[i].duration)
2946 continue;
2947
2948 ieee80211_extend_noa_desc(data, tsf, i);
2949 ret++;
2950 }
2951
2952 if (ret)
2953 ieee80211_update_p2p_noa(data, tsf);
2954
2955 return ret;
2956}
2957EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
Thomas Pedersen057d5f42013-12-19 10:25:15 -08002958
2959void ieee80211_recalc_dtim(struct ieee80211_local *local,
2960 struct ieee80211_sub_if_data *sdata)
2961{
2962 u64 tsf = drv_get_tsf(local, sdata);
2963 u64 dtim_count = 0;
2964 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2965 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2966 struct ps_data *ps;
2967 u8 bcns_from_dtim;
2968
2969 if (tsf == -1ULL || !beacon_int || !dtim_period)
2970 return;
2971
2972 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2973 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2974 if (!sdata->bss)
2975 return;
2976
2977 ps = &sdata->bss->ps;
2978 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2979 ps = &sdata->u.mesh.ps;
2980 } else {
2981 return;
2982 }
2983
2984 /*
2985 * actually finds last dtim_count, mac80211 will update in
2986 * __beacon_add_tim().
2987 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2988 */
2989 do_div(tsf, beacon_int);
2990 bcns_from_dtim = do_div(tsf, dtim_period);
2991 /* just had a DTIM */
2992 if (!bcns_from_dtim)
2993 dtim_count = 0;
2994 else
2995 dtim_count = dtim_period - bcns_from_dtim;
2996
2997 ps->dtim_count = dtim_count;
2998}
Luciano Coelho73de86a2014-02-13 11:31:59 +02002999
Michal Kazior71e61952014-06-25 12:35:07 +02003000static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3001 struct ieee80211_chanctx *ctx)
3002{
3003 struct ieee80211_sub_if_data *sdata;
3004 u8 radar_detect = 0;
3005
3006 lockdep_assert_held(&local->chanctx_mtx);
3007
3008 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3009 return 0;
3010
3011 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3012 if (sdata->reserved_radar_required)
3013 radar_detect |= BIT(sdata->reserved_chandef.width);
3014
3015 /*
3016 * An in-place reservation context should not have any assigned vifs
3017 * until it replaces the other context.
3018 */
3019 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3020 !list_empty(&ctx->assigned_vifs));
3021
3022 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3023 if (sdata->radar_required)
3024 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3025
3026 return radar_detect;
3027}
3028
Luciano Coelho73de86a2014-02-13 11:31:59 +02003029int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3030 const struct cfg80211_chan_def *chandef,
3031 enum ieee80211_chanctx_mode chanmode,
3032 u8 radar_detect)
3033{
3034 struct ieee80211_local *local = sdata->local;
3035 struct ieee80211_sub_if_data *sdata_iter;
3036 enum nl80211_iftype iftype = sdata->wdev.iftype;
3037 int num[NUM_NL80211_IFTYPES];
3038 struct ieee80211_chanctx *ctx;
Luciano Coelhob6a55012014-02-27 11:07:21 +02003039 int num_different_channels = 0;
Luciano Coelho73de86a2014-02-13 11:31:59 +02003040 int total = 1;
3041
3042 lockdep_assert_held(&local->chanctx_mtx);
3043
3044 if (WARN_ON(hweight32(radar_detect) > 1))
3045 return -EINVAL;
3046
Luciano Coelhob6a55012014-02-27 11:07:21 +02003047 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3048 !chandef->chan))
Luciano Coelho73de86a2014-02-13 11:31:59 +02003049 return -EINVAL;
3050
Luciano Coelhob6a55012014-02-27 11:07:21 +02003051 if (chandef)
3052 num_different_channels = 1;
3053
Luciano Coelho73de86a2014-02-13 11:31:59 +02003054 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3055 return -EINVAL;
3056
3057 /* Always allow software iftypes */
3058 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3059 if (radar_detect)
3060 return -EINVAL;
3061 return 0;
3062 }
3063
3064 memset(num, 0, sizeof(num));
3065
3066 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3067 num[iftype] = 1;
3068
3069 list_for_each_entry(ctx, &local->chanctx_list, list) {
Michal Kazior5bcae312014-06-25 12:35:06 +02003070 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3071 continue;
Michal Kazior71e61952014-06-25 12:35:07 +02003072 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
Luciano Coelho73de86a2014-02-13 11:31:59 +02003073 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3074 num_different_channels++;
3075 continue;
3076 }
Luciano Coelhob6a55012014-02-27 11:07:21 +02003077 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
Luciano Coelho73de86a2014-02-13 11:31:59 +02003078 cfg80211_chandef_compatible(chandef,
3079 &ctx->conf.def))
3080 continue;
3081 num_different_channels++;
3082 }
3083
3084 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3085 struct wireless_dev *wdev_iter;
3086
3087 wdev_iter = &sdata_iter->wdev;
3088
3089 if (sdata_iter == sdata ||
3090 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3091 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3092 continue;
3093
3094 num[wdev_iter->iftype]++;
3095 total++;
3096 }
3097
3098 if (total == 1 && !radar_detect)
3099 return 0;
3100
3101 return cfg80211_check_combinations(local->hw.wiphy,
3102 num_different_channels,
3103 radar_detect, num);
3104}
Michal Kazior6fa001b2014-04-09 15:29:23 +02003105
3106static void
3107ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3108 void *data)
3109{
3110 u32 *max_num_different_channels = data;
3111
3112 *max_num_different_channels = max(*max_num_different_channels,
3113 c->num_different_channels);
3114}
3115
3116int ieee80211_max_num_channels(struct ieee80211_local *local)
3117{
3118 struct ieee80211_sub_if_data *sdata;
3119 int num[NUM_NL80211_IFTYPES] = {};
3120 struct ieee80211_chanctx *ctx;
3121 int num_different_channels = 0;
3122 u8 radar_detect = 0;
3123 u32 max_num_different_channels = 1;
3124 int err;
3125
3126 lockdep_assert_held(&local->chanctx_mtx);
3127
3128 list_for_each_entry(ctx, &local->chanctx_list, list) {
Michal Kazior5bcae312014-06-25 12:35:06 +02003129 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3130 continue;
3131
Michal Kazior6fa001b2014-04-09 15:29:23 +02003132 num_different_channels++;
3133
Michal Kazior71e61952014-06-25 12:35:07 +02003134 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
Michal Kazior6fa001b2014-04-09 15:29:23 +02003135 }
3136
3137 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3138 num[sdata->wdev.iftype]++;
3139
3140 err = cfg80211_iter_combinations(local->hw.wiphy,
3141 num_different_channels, radar_detect,
3142 num, ieee80211_iter_max_chans,
3143 &max_num_different_channels);
3144 if (err < 0)
3145 return err;
3146
3147 return max_num_different_channels;
3148}
Arik Nemtsov40b861a2014-07-17 17:14:23 +03003149
3150u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3151{
3152 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3153 *buf++ = 7; /* len */
3154 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3155 *buf++ = 0x50;
3156 *buf++ = 0xf2;
3157 *buf++ = 2; /* WME */
3158 *buf++ = 0; /* WME info */
3159 *buf++ = 1; /* WME ver */
3160 *buf++ = qosinfo; /* U-APSD no in use */
3161
3162 return buf;
3163}