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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 Berg9607e6b662009-12-23 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:
Arik Nemtsov9041c1f2014-11-09 18:50:15 +0200834 case WLAN_EID_EXT_CAPABILITY:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100835 /*
836 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
837 * that if the content gets bigger it might be needed more than once
838 */
Johannes Berg9690fb12012-10-24 14:19:53 +0200839 if (test_bit(id, seen_elems)) {
840 elems->parse_error = true;
841 left -= elen;
842 pos += elen;
843 continue;
844 }
845 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800846 }
Johannes Bergdd769862011-11-18 16:54:50 +0100847
848 if (calc_crc && id < 64 && (filter & (1ULL << id)))
849 crc = crc32_be(crc, pos - 2, elen + 2);
850
Paul Stewartfcff4f12012-02-23 17:59:53 -0800851 elem_parse_failed = false;
852
Johannes Bergdd769862011-11-18 16:54:50 +0100853 switch (id) {
Arik Nemtsov9041c1f2014-11-09 18:50:15 +0200854 case WLAN_EID_EXT_CAPABILITY:
855 elems->ext_capab = pos;
856 elems->ext_capab_len = elen;
857 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100858 case WLAN_EID_SSID:
859 elems->ssid = pos;
860 elems->ssid_len = elen;
861 break;
862 case WLAN_EID_SUPP_RATES:
863 elems->supp_rates = pos;
864 elems->supp_rates_len = elen;
865 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100866 case WLAN_EID_DS_PARAMS:
Johannes Berg1cd8e882013-03-27 14:30:12 +0100867 if (elen >= 1)
868 elems->ds_params = pos;
869 else
870 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100871 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100872 case WLAN_EID_TIM:
873 if (elen >= sizeof(struct ieee80211_tim_ie)) {
874 elems->tim = (void *)pos;
875 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800876 } else
877 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100878 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100879 case WLAN_EID_CHALLENGE:
880 elems->challenge = pos;
881 elems->challenge_len = elen;
882 break;
883 case WLAN_EID_VENDOR_SPECIFIC:
884 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
885 pos[2] == 0xf2) {
886 /* Microsoft OUI (00:50:F2) */
887
888 if (calc_crc)
889 crc = crc32_be(crc, pos - 2, elen + 2);
890
Johannes Berg441a33b2013-02-12 16:27:04 +0100891 if (elen >= 5 && pos[3] == 2) {
Johannes Bergdd769862011-11-18 16:54:50 +0100892 /* OUI Type 2 - WMM IE */
893 if (pos[4] == 0) {
894 elems->wmm_info = pos;
895 elems->wmm_info_len = elen;
896 } else if (pos[4] == 1) {
897 elems->wmm_param = pos;
898 elems->wmm_param_len = elen;
899 }
900 }
901 }
902 break;
903 case WLAN_EID_RSN:
904 elems->rsn = pos;
905 elems->rsn_len = elen;
906 break;
907 case WLAN_EID_ERP_INFO:
Johannes Berg1946bed2013-03-27 14:31:53 +0100908 if (elen >= 1)
909 elems->erp_info = pos;
910 else
911 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100912 break;
913 case WLAN_EID_EXT_SUPP_RATES:
914 elems->ext_supp_rates = pos;
915 elems->ext_supp_rates_len = elen;
916 break;
917 case WLAN_EID_HT_CAPABILITY:
918 if (elen >= sizeof(struct ieee80211_ht_cap))
919 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800920 else
921 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100922 break;
Johannes Berg074d46d2012-03-15 19:45:16 +0100923 case WLAN_EID_HT_OPERATION:
924 if (elen >= sizeof(struct ieee80211_ht_operation))
925 elems->ht_operation = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800926 else
927 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100928 break;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000929 case WLAN_EID_VHT_CAPABILITY:
930 if (elen >= sizeof(struct ieee80211_vht_cap))
931 elems->vht_cap_elem = (void *)pos;
932 else
933 elem_parse_failed = true;
934 break;
935 case WLAN_EID_VHT_OPERATION:
936 if (elen >= sizeof(struct ieee80211_vht_operation))
937 elems->vht_operation = (void *)pos;
938 else
939 elem_parse_failed = true;
940 break;
Johannes Bergbee7f5862013-02-07 22:24:55 +0100941 case WLAN_EID_OPMODE_NOTIF:
942 if (elen > 0)
943 elems->opmode_notif = pos;
944 else
945 elem_parse_failed = true;
946 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100947 case WLAN_EID_MESH_ID:
948 elems->mesh_id = pos;
949 elems->mesh_id_len = elen;
950 break;
951 case WLAN_EID_MESH_CONFIG:
952 if (elen >= sizeof(struct ieee80211_meshconf_ie))
953 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800954 else
955 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100956 break;
957 case WLAN_EID_PEER_MGMT:
958 elems->peering = pos;
959 elems->peering_len = elen;
960 break;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100961 case WLAN_EID_MESH_AWAKE_WINDOW:
962 if (elen >= 2)
963 elems->awake_window = (void *)pos;
964 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100965 case WLAN_EID_PREQ:
966 elems->preq = pos;
967 elems->preq_len = elen;
968 break;
969 case WLAN_EID_PREP:
970 elems->prep = pos;
971 elems->prep_len = elen;
972 break;
973 case WLAN_EID_PERR:
974 elems->perr = pos;
975 elems->perr_len = elen;
976 break;
977 case WLAN_EID_RANN:
978 if (elen >= sizeof(struct ieee80211_rann_ie))
979 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800980 else
981 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100982 break;
983 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +0200984 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
985 elem_parse_failed = true;
986 break;
987 }
988 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100989 break;
Johannes Bergb4f286a12013-03-26 14:13:58 +0100990 case WLAN_EID_EXT_CHANSWITCH_ANN:
991 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
992 elem_parse_failed = true;
993 break;
994 }
995 elems->ext_chansw_ie = (void *)pos;
996 break;
Johannes Berg85220d72013-03-25 18:29:27 +0100997 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
998 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
999 elem_parse_failed = true;
1000 break;
1001 }
1002 elems->sec_chan_offs = (void *)pos;
1003 break;
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -07001004 case WLAN_EID_CHAN_SWITCH_PARAM:
1005 if (elen !=
1006 sizeof(*elems->mesh_chansw_params_ie)) {
1007 elem_parse_failed = true;
1008 break;
1009 }
1010 elems->mesh_chansw_params_ie = (void *)pos;
1011 break;
Johannes Bergb2e506b2013-03-26 14:54:16 +01001012 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1013 if (!action ||
1014 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1015 elem_parse_failed = true;
1016 break;
1017 }
1018 elems->wide_bw_chansw_ie = (void *)pos;
1019 break;
1020 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1021 if (action) {
1022 elem_parse_failed = true;
1023 break;
1024 }
1025 /*
1026 * This is a bit tricky, but as we only care about
1027 * the wide bandwidth channel switch element, so
1028 * just parse it out manually.
1029 */
1030 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1031 pos, elen);
1032 if (ie) {
1033 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1034 elems->wide_bw_chansw_ie =
1035 (void *)(ie + 2);
1036 else
1037 elem_parse_failed = true;
1038 }
1039 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001040 case WLAN_EID_COUNTRY:
1041 elems->country_elem = pos;
1042 elems->country_elem_len = elen;
1043 break;
1044 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +02001045 if (elen != 1) {
1046 elem_parse_failed = true;
1047 break;
1048 }
Johannes Bergdd769862011-11-18 16:54:50 +01001049 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +01001050 break;
Steinar H. Gundersonc8d65912014-09-03 06:48:37 -07001051 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1052 /* Lots of different options exist, but we only care
1053 * about the Dynamic Transmit Power Control element.
1054 * First check for the Cisco OUI, then for the DTPC
1055 * tag (0x00).
1056 */
1057 if (elen < 4) {
1058 elem_parse_failed = true;
1059 break;
1060 }
1061
1062 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1063 pos[2] != 0x96 || pos[3] != 0x00)
1064 break;
1065
1066 if (elen != 6) {
1067 elem_parse_failed = true;
1068 break;
1069 }
1070
1071 if (calc_crc)
1072 crc = crc32_be(crc, pos - 2, elen + 2);
1073
1074 elems->cisco_dtpc_elem = pos;
1075 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001076 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg79ba1d82013-03-27 14:38:07 +01001077 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1078 elems->timeout_int = (void *)pos;
1079 else
1080 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +01001081 break;
1082 default:
1083 break;
1084 }
1085
Paul Stewartfcff4f12012-02-23 17:59:53 -08001086 if (elem_parse_failed)
1087 elems->parse_error = true;
1088 else
Johannes Berg5df45692012-10-24 14:22:37 +02001089 __set_bit(id, seen_elems);
Paul Stewartfcff4f12012-02-23 17:59:53 -08001090
Johannes Bergdd769862011-11-18 16:54:50 +01001091 left -= elen;
1092 pos += elen;
1093 }
1094
Paul Stewartfcff4f12012-02-23 17:59:53 -08001095 if (left != 0)
1096 elems->parse_error = true;
1097
Johannes Bergdd769862011-11-18 16:54:50 +01001098 return crc;
1099}
1100
Johannes Berg3abead52012-03-02 15:56:59 +01001101void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1102 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +02001103{
1104 struct ieee80211_local *local = sdata->local;
1105 struct ieee80211_tx_queue_params qparam;
Johannes Berg55de9082012-07-26 17:24:39 +02001106 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg54bcbc62012-03-28 11:04:25 +02001107 int ac;
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001108 bool use_11b, enable_qos;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001109 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
Johannes Bergaa837e12009-05-07 16:16:24 +02001110 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +02001111
1112 if (!local->ops->conf_tx)
1113 return;
1114
Johannes Berg54bcbc62012-03-28 11:04:25 +02001115 if (local->hw.queues < IEEE80211_NUM_ACS)
1116 return;
1117
Johannes Berg5825fe102008-09-09 12:56:01 +02001118 memset(&qparam, 0, sizeof(qparam));
1119
Johannes Berg55de9082012-07-26 17:24:39 +02001120 rcu_read_lock();
1121 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1122 use_11b = (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +01001123 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +02001124 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg55de9082012-07-26 17:24:39 +02001125 rcu_read_unlock();
Johannes Berg5825fe102008-09-09 12:56:01 +02001126
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001127 /*
1128 * By default disable QoS in STA mode for old access points, which do
1129 * not support 802.11e. New APs will provide proper queue parameters,
1130 * that we will configure later.
1131 */
1132 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1133
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001134 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1135
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001136 /* Set defaults according to 802.11-2007 Table 7-37 */
1137 aCWmax = 1023;
1138 if (use_11b)
1139 aCWmin = 31;
1140 else
1141 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +02001142
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001143 /* Confiure old 802.11b/g medium access rules. */
1144 qparam.cw_max = aCWmax;
1145 qparam.cw_min = aCWmin;
1146 qparam.txop = 0;
1147 qparam.aifs = 2;
1148
1149 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1150 /* Update if QoS is enabled. */
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001151 if (enable_qos) {
1152 switch (ac) {
1153 case IEEE80211_AC_BK:
1154 qparam.cw_max = aCWmax;
1155 qparam.cw_min = aCWmin;
1156 qparam.txop = 0;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001157 if (is_ocb)
1158 qparam.aifs = 9;
1159 else
1160 qparam.aifs = 7;
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001161 break;
1162 /* never happens but let's not leave undefined */
1163 default:
1164 case IEEE80211_AC_BE:
1165 qparam.cw_max = aCWmax;
1166 qparam.cw_min = aCWmin;
1167 qparam.txop = 0;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001168 if (is_ocb)
1169 qparam.aifs = 6;
1170 else
1171 qparam.aifs = 3;
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001172 break;
1173 case IEEE80211_AC_VI:
1174 qparam.cw_max = aCWmin;
1175 qparam.cw_min = (aCWmin + 1) / 2 - 1;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001176 if (is_ocb)
1177 qparam.txop = 0;
1178 else if (use_11b)
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001179 qparam.txop = 6016/32;
1180 else
1181 qparam.txop = 3008/32;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001182
1183 if (is_ocb)
1184 qparam.aifs = 3;
1185 else
1186 qparam.aifs = 2;
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001187 break;
1188 case IEEE80211_AC_VO:
1189 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1190 qparam.cw_min = (aCWmin + 1) / 4 - 1;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001191 if (is_ocb)
1192 qparam.txop = 0;
1193 else if (use_11b)
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001194 qparam.txop = 3264/32;
1195 else
1196 qparam.txop = 1504/32;
1197 qparam.aifs = 2;
1198 break;
1199 }
Johannes Bergaa837e12009-05-07 16:16:24 +02001200 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001201
Kalle Valoab133152010-01-12 10:42:31 +02001202 qparam.uapsd = false;
1203
Johannes Berg54bcbc62012-03-28 11:04:25 +02001204 sdata->tx_conf[ac] = qparam;
1205 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +02001206 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001207
Johannes Bergf142c6b2012-06-18 20:07:15 +02001208 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1209 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001210 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +01001211 if (bss_notify)
1212 ieee80211_bss_info_change_notify(sdata,
1213 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +05301214 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001215}
Johannes Berge50db652008-09-09 15:07:09 +02001216
Johannes Berg46900292009-02-15 12:44:28 +01001217void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001218 u16 transaction, u16 auth_alg, u16 status,
Johannes Berg4a3cb702013-02-12 16:43:19 +01001219 const u8 *extra, size_t extra_len, const u8 *da,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001220 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1221 u32 tx_flags)
Johannes Berg46900292009-02-15 12:44:28 +01001222{
1223 struct ieee80211_local *local = sdata->local;
1224 struct sk_buff *skb;
1225 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +02001226 int err;
Johannes Berg46900292009-02-15 12:44:28 +01001227
Fred Zhou15e230a2013-09-24 10:33:01 +08001228 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
Max Stepanov744462a2014-06-10 20:00:08 +03001229 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1230 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
Joe Perchesd15b8452011-08-29 14:17:31 -07001231 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +01001232 return;
Joe Perchesd15b8452011-08-29 14:17:31 -07001233
Max Stepanov744462a2014-06-10 20:00:08 +03001234 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
Johannes Berg46900292009-02-15 12:44:28 +01001235
1236 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1237 memset(mgmt, 0, 24 + 6);
1238 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1239 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001240 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001241 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001242 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1243 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1244 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001245 mgmt->u.auth.status_code = cpu_to_le16(status);
Johannes Berg46900292009-02-15 12:44:28 +01001246 if (extra)
1247 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +01001248
Johannes Bergfffd0932009-07-08 14:22:54 +02001249 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1250 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1251 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1252 WARN_ON(err);
1253 }
1254
Johannes Berg1672c0e32013-01-29 15:02:27 +01001255 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1256 tx_flags;
Johannes Berg62ae67b2009-11-18 18:42:05 +01001257 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001258}
1259
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001260void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1261 const u8 *bssid, u16 stype, u16 reason,
1262 bool send_frame, u8 *frame_buf)
1263{
1264 struct ieee80211_local *local = sdata->local;
1265 struct sk_buff *skb;
1266 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1267
1268 /* build frame */
1269 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1270 mgmt->duration = 0; /* initialize only */
1271 mgmt->seq_ctrl = 0; /* initialize only */
1272 memcpy(mgmt->da, bssid, ETH_ALEN);
1273 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1274 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1275 /* u.deauth.reason_code == u.disassoc.reason_code */
1276 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1277
1278 if (send_frame) {
1279 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1280 IEEE80211_DEAUTH_FRAME_LEN);
1281 if (!skb)
1282 return;
1283
1284 skb_reserve(skb, local->hw.extra_tx_headroom);
1285
1286 /* copy in frame */
1287 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1288 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1289
1290 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1291 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1292 IEEE80211_SKB_CB(skb)->flags |=
1293 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1294
1295 ieee80211_tx_skb(sdata, skb);
1296 }
1297}
1298
David Spinadelc56ef672014-02-05 15:21:13 +02001299static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1300 u8 *buffer, size_t buffer_len,
1301 const u8 *ie, size_t ie_len,
1302 enum ieee80211_band band,
1303 u32 rate_mask,
1304 struct cfg80211_chan_def *chandef,
1305 size_t *offset)
Johannes Bergde95a542009-04-01 11:58:36 +02001306{
1307 struct ieee80211_supported_band *sband;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001308 u8 *pos = buffer, *end = buffer + buffer_len;
David Spinadelc56ef672014-02-05 15:21:13 +02001309 size_t noffset;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001310 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001311 u8 rates[32];
1312 int num_rates;
1313 int ext_rates_len;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001314 int shift;
1315 u32 rate_flags;
Johannes Bergde95a542009-04-01 11:58:36 +02001316
David Spinadelc56ef672014-02-05 15:21:13 +02001317 *offset = 0;
1318
Johannes Berg4d36ec52009-10-27 20:59:55 +01001319 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001320 if (WARN_ON_ONCE(!sband))
1321 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001322
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001323 rate_flags = ieee80211_chandef_rate_flags(chandef);
1324 shift = ieee80211_chandef_get_shift(chandef);
1325
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001326 num_rates = 0;
1327 for (i = 0; i < sband->n_bitrates; i++) {
1328 if ((BIT(i) & rate_mask) == 0)
1329 continue; /* skip rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001330 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1331 continue;
1332
1333 rates[num_rates++] =
1334 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1335 (1 << shift) * 5);
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001336 }
1337
1338 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001339
Johannes Bergc604b9f2012-11-29 12:45:18 +01001340 if (end - pos < 2 + supp_rates_len)
1341 goto out_err;
Johannes Bergde95a542009-04-01 11:58:36 +02001342 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001343 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001344 memcpy(pos, rates, supp_rates_len);
1345 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001346
Johannes Berg8e664fb2009-12-23 13:15:38 +01001347 /* insert "request information" if in custom IEs */
1348 if (ie && ie_len) {
1349 static const u8 before_extrates[] = {
1350 WLAN_EID_SSID,
1351 WLAN_EID_SUPP_RATES,
1352 WLAN_EID_REQUEST,
1353 };
1354 noffset = ieee80211_ie_split(ie, ie_len,
1355 before_extrates,
1356 ARRAY_SIZE(before_extrates),
David Spinadelc56ef672014-02-05 15:21:13 +02001357 *offset);
1358 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001359 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001360 memcpy(pos, ie + *offset, noffset - *offset);
1361 pos += noffset - *offset;
1362 *offset = noffset;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001363 }
Johannes Bergde95a542009-04-01 11:58:36 +02001364
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001365 ext_rates_len = num_rates - supp_rates_len;
1366 if (ext_rates_len > 0) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001367 if (end - pos < 2 + ext_rates_len)
1368 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001369 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001370 *pos++ = ext_rates_len;
1371 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1372 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001373 }
1374
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001375 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001376 if (end - pos < 3)
1377 goto out_err;
Jouni Malinen651b5222010-08-28 19:37:51 +03001378 *pos++ = WLAN_EID_DS_PARAMS;
1379 *pos++ = 1;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001380 *pos++ = ieee80211_frequency_to_channel(
1381 chandef->chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001382 }
1383
Johannes Berg8e664fb2009-12-23 13:15:38 +01001384 /* insert custom IEs that go before HT */
1385 if (ie && ie_len) {
1386 static const u8 before_ht[] = {
1387 WLAN_EID_SSID,
1388 WLAN_EID_SUPP_RATES,
1389 WLAN_EID_REQUEST,
1390 WLAN_EID_EXT_SUPP_RATES,
1391 WLAN_EID_DS_PARAMS,
1392 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1393 };
1394 noffset = ieee80211_ie_split(ie, ie_len,
1395 before_ht, ARRAY_SIZE(before_ht),
David Spinadelc56ef672014-02-05 15:21:13 +02001396 *offset);
1397 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001398 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001399 memcpy(pos, ie + *offset, noffset - *offset);
1400 pos += noffset - *offset;
1401 *offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001402 }
1403
Johannes Bergc604b9f2012-11-29 12:45:18 +01001404 if (sband->ht_cap.ht_supported) {
1405 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1406 goto out_err;
Ben Greearef96a8422011-11-18 11:32:00 -08001407 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1408 sband->ht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001409 }
Johannes Berg5ef2d412009-03-31 12:12:07 +02001410
Johannes Bergde95a542009-04-01 11:58:36 +02001411 /*
1412 * If adding more here, adjust code in main.c
1413 * that calculates local->scan_ies_len.
1414 */
1415
Johannes Berg4d952302014-02-04 09:48:34 +01001416 /* insert custom IEs that go before VHT */
Johannes Berg8e664fb2009-12-23 13:15:38 +01001417 if (ie && ie_len) {
Johannes Berg4d952302014-02-04 09:48:34 +01001418 static const u8 before_vht[] = {
1419 WLAN_EID_SSID,
1420 WLAN_EID_SUPP_RATES,
1421 WLAN_EID_REQUEST,
1422 WLAN_EID_EXT_SUPP_RATES,
1423 WLAN_EID_DS_PARAMS,
1424 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1425 WLAN_EID_HT_CAPABILITY,
1426 WLAN_EID_BSS_COEX_2040,
1427 WLAN_EID_EXT_CAPABILITY,
1428 WLAN_EID_SSID_LIST,
1429 WLAN_EID_CHANNEL_USAGE,
1430 WLAN_EID_INTERWORKING,
1431 /* mesh ID can't happen here */
1432 /* 60 GHz can't happen here right now */
1433 };
1434 noffset = ieee80211_ie_split(ie, ie_len,
1435 before_vht, ARRAY_SIZE(before_vht),
David Spinadelc56ef672014-02-05 15:21:13 +02001436 *offset);
1437 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001438 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001439 memcpy(pos, ie + *offset, noffset - *offset);
1440 pos += noffset - *offset;
1441 *offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001442 }
1443
Johannes Bergc604b9f2012-11-29 12:45:18 +01001444 if (sband->vht_cap.vht_supported) {
1445 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1446 goto out_err;
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00001447 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1448 sband->vht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001449 }
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00001450
Johannes Bergde95a542009-04-01 11:58:36 +02001451 return pos - buffer;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001452 out_err:
1453 WARN_ONCE(1, "not enough space for preq IEs\n");
1454 return pos - buffer;
Johannes Bergde95a542009-04-01 11:58:36 +02001455}
1456
David Spinadelc56ef672014-02-05 15:21:13 +02001457int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1458 size_t buffer_len,
1459 struct ieee80211_scan_ies *ie_desc,
1460 const u8 *ie, size_t ie_len,
1461 u8 bands_used, u32 *rate_masks,
1462 struct cfg80211_chan_def *chandef)
1463{
1464 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1465 int i;
1466
1467 memset(ie_desc, 0, sizeof(*ie_desc));
1468
1469 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1470 if (bands_used & BIT(i)) {
1471 pos += ieee80211_build_preq_ies_band(local,
1472 buffer + pos,
1473 buffer_len - pos,
1474 ie, ie_len, i,
1475 rate_masks[i],
1476 chandef,
1477 &custom_ie_offset);
1478 ie_desc->ies[i] = buffer + old_pos;
1479 ie_desc->len[i] = pos - old_pos;
1480 old_pos = pos;
1481 }
1482 }
1483
1484 /* add any remaining custom IEs */
1485 if (ie && ie_len) {
1486 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1487 "not enough space for preq custom IEs\n"))
1488 return pos;
1489 memcpy(buffer + pos, ie + custom_ie_offset,
1490 ie_len - custom_ie_offset);
1491 ie_desc->common_ies = buffer + pos;
1492 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1493 pos += ie_len - custom_ie_offset;
1494 }
1495
1496 return pos;
1497};
1498
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001499struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001500 u8 *dst, u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001501 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001502 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001503 const u8 *ie, size_t ie_len,
1504 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001505{
1506 struct ieee80211_local *local = sdata->local;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001507 struct cfg80211_chan_def chandef;
Johannes Berg46900292009-02-15 12:44:28 +01001508 struct sk_buff *skb;
1509 struct ieee80211_mgmt *mgmt;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001510 int ies_len;
David Spinadelc56ef672014-02-05 15:21:13 +02001511 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1512 struct ieee80211_scan_ies dummy_ie_desc;
Johannes Berg46900292009-02-15 12:44:28 +01001513
Paul Stewarta806c552011-06-23 09:00:11 -08001514 /*
1515 * Do not send DS Channel parameter for directed probe requests
1516 * in order to maximize the chance that we get a response. Some
1517 * badly-behaved APs don't respond when this parameter is included.
1518 */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001519 chandef.width = sdata->vif.bss_conf.chandef.width;
Paul Stewarta806c552011-06-23 09:00:11 -08001520 if (directed)
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001521 chandef.chan = NULL;
Paul Stewarta806c552011-06-23 09:00:11 -08001522 else
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001523 chandef.chan = chan;
Jouni Malinen651b5222010-08-28 19:37:51 +03001524
Kalle Valo7c12ce82010-01-05 20:16:44 +02001525 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001526 ssid, ssid_len, 100 + ie_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001527 if (!skb)
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001528 return NULL;
1529
David Spinadelc56ef672014-02-05 15:21:13 +02001530 rate_masks[chan->band] = ratemask;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001531 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
David Spinadelc56ef672014-02-05 15:21:13 +02001532 skb_tailroom(skb), &dummy_ie_desc,
1533 ie, ie_len, BIT(chan->band),
1534 rate_masks, &chandef);
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001535 skb_put(skb, ies_len);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001536
Johannes Berg46900292009-02-15 12:44:28 +01001537 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001538 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001539 memcpy(mgmt->da, dst, ETH_ALEN);
1540 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001541 }
Johannes Berg46900292009-02-15 12:44:28 +01001542
Johannes Berg62ae67b2009-11-18 18:42:05 +01001543 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001544
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001545 return skb;
1546}
1547
1548void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1549 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001550 const u8 *ie, size_t ie_len,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001551 u32 ratemask, bool directed, u32 tx_flags,
Johannes Berg55de9082012-07-26 17:24:39 +02001552 struct ieee80211_channel *channel, bool scan)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001553{
1554 struct sk_buff *skb;
1555
Johannes Bergfe94fe02012-07-30 12:26:34 +02001556 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001557 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001558 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301559 if (skb) {
Johannes Berg1672c0e32013-01-29 15:02:27 +01001560 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
Johannes Berg55de9082012-07-26 17:24:39 +02001561 if (scan)
1562 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1563 else
1564 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301565 }
Johannes Berg46900292009-02-15 12:44:28 +01001566}
1567
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001568u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
Johannes Berg46900292009-02-15 12:44:28 +01001569 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001570 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001571{
1572 struct ieee80211_supported_band *sband;
Johannes Berg46900292009-02-15 12:44:28 +01001573 size_t num_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001574 u32 supp_rates, rate_flags;
1575 int i, j, shift;
1576 sband = sdata->local->hw.wiphy->bands[band];
1577
1578 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1579 shift = ieee80211_vif_get_shift(&sdata->vif);
Johannes Berg46900292009-02-15 12:44:28 +01001580
Michal Kazior4ee73f32012-04-11 08:47:56 +02001581 if (WARN_ON(!sband))
1582 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001583
Johannes Berg46900292009-02-15 12:44:28 +01001584 num_rates = sband->n_bitrates;
1585 supp_rates = 0;
1586 for (i = 0; i < elems->supp_rates_len +
1587 elems->ext_supp_rates_len; i++) {
1588 u8 rate = 0;
1589 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001590 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001591 if (i < elems->supp_rates_len)
1592 rate = elems->supp_rates[i];
1593 else if (elems->ext_supp_rates)
1594 rate = elems->ext_supp_rates
1595 [i - elems->supp_rates_len];
1596 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001597 is_basic = !!(rate & 0x80);
1598
1599 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1600 continue;
1601
1602 for (j = 0; j < num_rates; j++) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001603 int brate;
1604 if ((rate_flags & sband->bitrates[j].flags)
1605 != rate_flags)
1606 continue;
1607
1608 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1609 1 << shift);
1610
1611 if (brate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001612 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001613 if (basic_rates && is_basic)
1614 *basic_rates |= BIT(j);
1615 }
1616 }
Johannes Berg46900292009-02-15 12:44:28 +01001617 }
1618 return supp_rates;
1619}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001620
Johannes Berg84f6a012009-08-20 20:02:20 +02001621void ieee80211_stop_device(struct ieee80211_local *local)
1622{
1623 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001624 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001625
1626 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001627
1628 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001629 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001630}
1631
Johannes Bergf6837ba82014-04-30 14:19:04 +02001632static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1633{
1634 struct ieee80211_sub_if_data *sdata;
1635 struct ieee80211_chanctx *ctx;
1636
1637 /*
1638 * We get here if during resume the device can't be restarted properly.
1639 * We might also get here if this happens during HW reset, which is a
1640 * slightly different situation and we need to drop all connections in
1641 * the latter case.
1642 *
1643 * Ask cfg80211 to turn off all interfaces, this will result in more
1644 * warnings but at least we'll then get into a clean stopped state.
1645 */
1646
1647 local->resuming = false;
1648 local->suspended = false;
1649 local->started = false;
1650
1651 /* scheduled scan clearly can't be running any more, but tell
1652 * cfg80211 and clear local state
1653 */
1654 ieee80211_sched_scan_end(local);
1655
1656 list_for_each_entry(sdata, &local->interfaces, list)
1657 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1658
1659 /* Mark channel contexts as not being in the driver any more to avoid
1660 * removing them from the driver during the shutdown process...
1661 */
1662 mutex_lock(&local->chanctx_mtx);
1663 list_for_each_entry(ctx, &local->chanctx_list, list)
1664 ctx->driver_present = false;
1665 mutex_unlock(&local->chanctx_mtx);
1666
1667 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1668}
1669
Stanislaw Gruszka153a5fc42013-02-28 10:55:30 +01001670static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1671 struct ieee80211_sub_if_data *sdata)
1672{
1673 struct ieee80211_chanctx_conf *conf;
1674 struct ieee80211_chanctx *ctx;
1675
1676 if (!local->use_chanctx)
1677 return;
1678
1679 mutex_lock(&local->chanctx_mtx);
1680 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1681 lockdep_is_held(&local->chanctx_mtx));
1682 if (conf) {
1683 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1684 drv_assign_vif_chanctx(local, sdata, ctx);
1685 }
1686 mutex_unlock(&local->chanctx_mtx);
1687}
1688
Johannes Bergf2753dd2009-04-14 10:09:24 +02001689int ieee80211_reconfig(struct ieee80211_local *local)
1690{
1691 struct ieee80211_hw *hw = &local->hw;
1692 struct ieee80211_sub_if_data *sdata;
Johannes Berg55de9082012-07-26 17:24:39 +02001693 struct ieee80211_chanctx *ctx;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001694 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001695 int res, i;
Johannes Bergd8881302013-01-10 23:55:33 +01001696 bool reconfig_due_to_wowlan = false;
David Spinadeld43c6b62013-12-08 21:48:57 +02001697 struct ieee80211_sub_if_data *sched_scan_sdata;
1698 bool sched_scan_stopped = false;
Johannes Bergd8881302013-01-10 23:55:33 +01001699
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001700#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001701 if (local->suspended)
1702 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001703
Johannes Bergeecc4802011-05-04 15:37:29 +02001704 if (local->wowlan) {
Johannes Bergeecc4802011-05-04 15:37:29 +02001705 res = drv_resume(local);
Johannes Berg27b3eb92013-08-07 20:11:55 +02001706 local->wowlan = false;
Johannes Bergeecc4802011-05-04 15:37:29 +02001707 if (res < 0) {
1708 local->resuming = false;
1709 return res;
1710 }
1711 if (res == 0)
1712 goto wake_up;
1713 WARN_ON(res > 1);
1714 /*
1715 * res is 1, which means the driver requested
1716 * to go through a regular reset on wakeup.
1717 */
Johannes Bergd8881302013-01-10 23:55:33 +01001718 reconfig_due_to_wowlan = true;
Johannes Bergeecc4802011-05-04 15:37:29 +02001719 }
1720#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001721 /* everything else happens only if HW was up & running */
1722 if (!local->open_count)
1723 goto wake_up;
1724
1725 /*
1726 * Upon resume hardware can sometimes be goofy due to
1727 * various platform / driver / bus issues, so restarting
1728 * the device may at times not work immediately. Propagate
1729 * the error.
1730 */
1731 res = drv_start(local);
1732 if (res) {
Johannes Bergf6837ba82014-04-30 14:19:04 +02001733 if (local->suspended)
1734 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1735 else
1736 WARN(1, "Hardware became unavailable during restart.\n");
1737 ieee80211_handle_reconfig_failure(local);
Johannes Berg94f9b972011-07-14 16:48:54 +02001738 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001739 }
1740
Yogesh Ashok Powar7f2819752011-12-30 16:34:25 +05301741 /* setup fragmentation threshold */
1742 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1743
1744 /* setup RTS threshold */
1745 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1746
1747 /* reset coverage class */
1748 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1749
Johannes Berg94f9b972011-07-14 16:48:54 +02001750 ieee80211_led_radio(local, true);
1751 ieee80211_mod_tpt_led_trig(local,
1752 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1753
Johannes Bergf2753dd2009-04-14 10:09:24 +02001754 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001755 sdata = rtnl_dereference(local->monitor_sdata);
1756 if (sdata) {
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001757 /* in HW restart it exists already */
1758 WARN_ON(local->resuming);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001759 res = drv_add_interface(local, sdata);
1760 if (WARN_ON(res)) {
Monam Agarwal0c2bef462014-03-24 00:51:43 +05301761 RCU_INIT_POINTER(local->monitor_sdata, NULL);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001762 synchronize_net();
1763 kfree(sdata);
1764 }
1765 }
1766
Johannes Bergf2753dd2009-04-14 10:09:24 +02001767 list_for_each_entry(sdata, &local->interfaces, list) {
1768 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1769 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001770 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001771 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001772 }
1773
Johannes Berg55de9082012-07-26 17:24:39 +02001774 /* add channel contexts */
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001775 if (local->use_chanctx) {
1776 mutex_lock(&local->chanctx_mtx);
1777 list_for_each_entry(ctx, &local->chanctx_list, list)
Michal Kazior5bcae312014-06-25 12:35:06 +02001778 if (ctx->replace_state !=
1779 IEEE80211_CHANCTX_REPLACES_OTHER)
1780 WARN_ON(drv_add_chanctx(local, ctx));
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001781 mutex_unlock(&local->chanctx_mtx);
Johannes Berg55de9082012-07-26 17:24:39 +02001782
Zhao, Gang7df180f2014-04-26 09:43:40 +08001783 list_for_each_entry(sdata, &local->interfaces, list) {
1784 if (!ieee80211_sdata_running(sdata))
1785 continue;
1786 ieee80211_assign_chanctx(local, sdata);
1787 }
Johannes Berg6352c872012-11-07 12:40:41 +01001788
Zhao, Gang7df180f2014-04-26 09:43:40 +08001789 sdata = rtnl_dereference(local->monitor_sdata);
1790 if (sdata && ieee80211_sdata_running(sdata))
1791 ieee80211_assign_chanctx(local, sdata);
1792 }
Johannes Bergfe5f2552012-11-19 22:19:08 +01001793
Johannes Bergf2753dd2009-04-14 10:09:24 +02001794 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001795 mutex_lock(&local->sta_mtx);
1796 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001797 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001798
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001799 if (!sta->uploaded)
1800 continue;
1801
1802 /* AP-mode stations will be added later */
1803 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1804 continue;
1805
1806 for (state = IEEE80211_STA_NOTEXIST;
1807 state < sta->sta_state; state++)
1808 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1809 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001810 }
Johannes Berg34e89502010-02-03 13:59:58 +01001811 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001812
Eliad Peller2683d652011-07-14 20:29:42 +03001813 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001814 if (hw->queues >= IEEE80211_NUM_ACS) {
1815 list_for_each_entry(sdata, &local->interfaces, list) {
1816 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1817 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1818 !ieee80211_sdata_running(sdata))
1819 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001820
Johannes Berg54bcbc62012-03-28 11:04:25 +02001821 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1822 drv_conf_tx(local, sdata, i,
1823 &sdata->tx_conf[i]);
1824 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001825 }
Eliad Peller2683d652011-07-14 20:29:42 +03001826
Johannes Bergf2753dd2009-04-14 10:09:24 +02001827 /* reconfigure hardware */
1828 ieee80211_hw_config(local, ~0);
1829
Johannes Bergf2753dd2009-04-14 10:09:24 +02001830 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001831
1832 /* Finally also reconfigure all the BSS information */
1833 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001834 u32 changed;
1835
Johannes Berg9607e6b662009-12-23 13:15:31 +01001836 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001837 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001838
1839 /* common change flags for all interface types */
1840 changed = BSS_CHANGED_ERP_CTS_PROT |
1841 BSS_CHANGED_ERP_PREAMBLE |
1842 BSS_CHANGED_ERP_SLOT |
1843 BSS_CHANGED_HT |
1844 BSS_CHANGED_BASIC_RATES |
1845 BSS_CHANGED_BEACON_INT |
1846 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001847 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001848 BSS_CHANGED_QOS |
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001849 BSS_CHANGED_IDLE |
1850 BSS_CHANGED_TXPOWER;
Johannes Bergac8dd502010-05-05 09:44:02 +02001851
Johannes Bergf2753dd2009-04-14 10:09:24 +02001852 switch (sdata->vif.type) {
1853 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001854 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001855 BSS_CHANGED_ARP_FILTER |
1856 BSS_CHANGED_PS;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001857
Alexander Bondar989c6502013-05-16 17:34:17 +03001858 /* Re-send beacon info report to the driver */
1859 if (sdata->u.mgd.have_beacon)
1860 changed |= BSS_CHANGED_BEACON_INFO;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001861
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001862 sdata_lock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001863 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001864 sdata_unlock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001865 break;
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001866 case NL80211_IFTYPE_OCB:
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001867 changed |= BSS_CHANGED_OCB;
1868 ieee80211_bss_info_change_notify(sdata, changed);
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001869 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001870 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001871 changed |= BSS_CHANGED_IBSS;
1872 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001873 case NL80211_IFTYPE_AP:
Johannes Berg339afbf2012-11-14 15:21:17 +01001874 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001875
Johannes Berg10416382012-10-19 15:44:42 +02001876 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001877 changed |= BSS_CHANGED_AP_PROBE_RESP;
1878
Johannes Berg10416382012-10-19 15:44:42 +02001879 if (rcu_access_pointer(sdata->u.ap.beacon))
1880 drv_start_ap(local, sdata);
1881 }
1882
Arik Nemtsov78274932011-09-04 11:11:32 +03001883 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001884 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg8da34932012-12-14 14:17:26 +01001885 if (sdata->vif.bss_conf.enable_beacon) {
1886 changed |= BSS_CHANGED_BEACON |
1887 BSS_CHANGED_BEACON_ENABLED;
1888 ieee80211_bss_info_change_notify(sdata, changed);
1889 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001890 break;
1891 case NL80211_IFTYPE_WDS:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001892 case NL80211_IFTYPE_AP_VLAN:
1893 case NL80211_IFTYPE_MONITOR:
Johannes Berg98104fde2012-06-16 00:19:54 +02001894 case NL80211_IFTYPE_P2P_DEVICE:
Zhao, Gangb2057862014-04-26 09:43:41 +08001895 /* nothing to do */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001896 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001897 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f782010-08-12 15:38:38 +02001898 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001899 case NL80211_IFTYPE_P2P_CLIENT:
1900 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001901 WARN_ON(1);
1902 break;
1903 }
1904 }
1905
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001906 ieee80211_recalc_ps(local, -1);
1907
Johannes Berg2a419052010-06-10 10:21:29 +02001908 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001909 * The sta might be in psm against the ap (e.g. because
1910 * this was the state before a hw restart), so we
1911 * explicitly send a null packet in order to make sure
1912 * it'll sync against the ap (and get out of psm).
1913 */
1914 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1915 list_for_each_entry(sdata, &local->interfaces, list) {
1916 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1917 continue;
Johannes Berg20f544e2012-11-08 14:06:28 +01001918 if (!sdata->u.mgd.associated)
1919 continue;
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001920
1921 ieee80211_send_nullfunc(local, sdata, 0);
1922 }
1923 }
1924
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001925 /* APs are now beaconing, add back stations */
1926 mutex_lock(&local->sta_mtx);
1927 list_for_each_entry(sta, &local->sta_list, list) {
1928 enum ieee80211_sta_state state;
1929
1930 if (!sta->uploaded)
1931 continue;
1932
1933 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1934 continue;
1935
1936 for (state = IEEE80211_STA_NOTEXIST;
1937 state < sta->sta_state; state++)
1938 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1939 state + 1));
1940 }
1941 mutex_unlock(&local->sta_mtx);
1942
Eyal Shapira7b21aea2012-05-29 02:00:22 -07001943 /* add back keys */
1944 list_for_each_entry(sdata, &local->interfaces, list)
1945 if (ieee80211_sdata_running(sdata))
1946 ieee80211_enable_keys(sdata);
1947
Eliad Pellerc6209482012-07-02 15:08:25 +03001948 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03001949 local->in_reconfig = false;
1950 barrier();
1951
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001952 if (local->monitors == local->open_count && local->monitors > 0)
1953 ieee80211_add_virtual_monitor(local);
1954
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001955 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001956 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1957 * sessions can be established after a resume.
1958 *
1959 * Also tear down aggregation sessions since reconfiguring
1960 * them in a hardware restart scenario is not easily done
1961 * right now, and the hardware will have lost information
1962 * about the sessions, but we and the AP still think they
1963 * are active. This is really a workaround though.
1964 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001965 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001966 mutex_lock(&local->sta_mtx);
1967
1968 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergc82c4a82012-07-18 13:31:31 +02001969 ieee80211_sta_tear_down_BA_sessions(
1970 sta, AGG_STOP_LOCAL_REQUEST);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001971 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001972 }
Johannes Berg2a419052010-06-10 10:21:29 +02001973
1974 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001975 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001976
Johannes Berg445ea4e2013-02-13 12:25:28 +01001977 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +03001978 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1979 false);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001980
Johannes Berg5bb644a2009-05-17 11:40:42 +02001981 /*
Arik Nemtsov32769812014-02-11 12:27:19 +02001982 * Reconfigure sched scan if it was interrupted by FW restart or
1983 * suspend.
1984 */
1985 mutex_lock(&local->mtx);
1986 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1987 lockdep_is_held(&local->mtx));
1988 if (sched_scan_sdata && local->sched_scan_req)
1989 /*
1990 * Sched scan stopped, but we don't want to report it. Instead,
1991 * we're trying to reschedule.
1992 */
1993 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1994 local->sched_scan_req))
1995 sched_scan_stopped = true;
1996 mutex_unlock(&local->mtx);
1997
1998 if (sched_scan_stopped)
Eliad Pellere669ba22014-04-30 16:14:24 +03001999 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
Arik Nemtsov32769812014-02-11 12:27:19 +02002000
2001 /*
Johannes Berg5bb644a2009-05-17 11:40:42 +02002002 * If this is for hw restart things are still running.
2003 * We may want to change that later, however.
2004 */
Johannes Berg8f21b0a2013-01-11 00:28:01 +01002005 if (!local->suspended || reconfig_due_to_wowlan)
Eliad Pellercf2c92d2014-11-04 11:43:54 +02002006 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
Johannes Berg8f21b0a2013-01-11 00:28:01 +01002007
2008 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02002009 return 0;
2010
2011#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01002012 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02002013 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01002014 mb();
2015 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02002016
Eliad Pellercf2c92d2014-11-04 11:43:54 +02002017 if (!reconfig_due_to_wowlan)
2018 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2019
Johannes Bergb8360ab2013-04-29 14:57:44 +02002020 list_for_each_entry(sdata, &local->interfaces, list) {
2021 if (!ieee80211_sdata_running(sdata))
2022 continue;
2023 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2024 ieee80211_sta_restart(sdata);
2025 }
2026
Johannes Berg26d59532011-04-01 13:52:48 +02002027 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02002028#else
2029 WARN_ON(1);
2030#endif
David Spinadeld43c6b62013-12-08 21:48:57 +02002031
Johannes Bergf2753dd2009-04-14 10:09:24 +02002032 return 0;
2033}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002034
Johannes Berg95acac62011-07-12 12:30:59 +02002035void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2036{
2037 struct ieee80211_sub_if_data *sdata;
2038 struct ieee80211_local *local;
2039 struct ieee80211_key *key;
2040
2041 if (WARN_ON(!vif))
2042 return;
2043
2044 sdata = vif_to_sdata(vif);
2045 local = sdata->local;
2046
2047 if (WARN_ON(!local->resuming))
2048 return;
2049
2050 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2051 return;
2052
2053 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2054
2055 mutex_lock(&local->key_mtx);
2056 list_for_each_entry(key, &sdata->key_list, list)
2057 key->flags |= KEY_FLAG_TAINTED;
2058 mutex_unlock(&local->key_mtx);
2059}
2060EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2061
Johannes Berg04ecd252012-09-11 14:34:12 +02002062void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
Johannes Berg0f782312009-12-01 13:37:02 +01002063{
Johannes Berg04ecd252012-09-11 14:34:12 +02002064 struct ieee80211_local *local = sdata->local;
2065 struct ieee80211_chanctx_conf *chanctx_conf;
2066 struct ieee80211_chanctx *chanctx;
Johannes Berg0f782312009-12-01 13:37:02 +01002067
Johannes Berg04ecd252012-09-11 14:34:12 +02002068 mutex_lock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01002069
Johannes Berg04ecd252012-09-11 14:34:12 +02002070 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2071 lockdep_is_held(&local->chanctx_mtx));
Johannes Berg0f782312009-12-01 13:37:02 +01002072
Johannes Berg04ecd252012-09-11 14:34:12 +02002073 if (WARN_ON_ONCE(!chanctx_conf))
Johannes Berg5d8e4232012-09-11 10:17:11 +02002074 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01002075
Johannes Berg04ecd252012-09-11 14:34:12 +02002076 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2077 ieee80211_recalc_smps_chanctx(local, chanctx);
Johannes Berg5d8e4232012-09-11 10:17:11 +02002078 unlock:
Johannes Berg04ecd252012-09-11 14:34:12 +02002079 mutex_unlock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01002080}
Johannes Berg8e664fb2009-12-23 13:15:38 +01002081
Eliad Peller21f659b2013-11-11 20:14:01 +02002082void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2083{
2084 struct ieee80211_local *local = sdata->local;
2085 struct ieee80211_chanctx_conf *chanctx_conf;
2086 struct ieee80211_chanctx *chanctx;
2087
2088 mutex_lock(&local->chanctx_mtx);
2089
2090 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2091 lockdep_is_held(&local->chanctx_mtx));
2092
2093 if (WARN_ON_ONCE(!chanctx_conf))
2094 goto unlock;
2095
2096 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2097 ieee80211_recalc_chanctx_min_def(local, chanctx);
2098 unlock:
2099 mutex_unlock(&local->chanctx_mtx);
2100}
2101
Johannes Berg8e664fb2009-12-23 13:15:38 +01002102static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2103{
2104 int i;
2105
2106 for (i = 0; i < n_ids; i++)
2107 if (ids[i] == id)
2108 return true;
2109 return false;
2110}
2111
Johannes Berg8ed28742014-10-27 12:03:19 +01002112size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2113 const u8 *ids, int n_ids,
2114 const u8 *after_ric, int n_after_ric,
2115 size_t offset)
Johannes Berg8e664fb2009-12-23 13:15:38 +01002116{
2117 size_t pos = offset;
2118
Johannes Berg8ed28742014-10-27 12:03:19 +01002119 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2120 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2121 pos += 2 + ies[pos + 1];
2122
2123 while (pos < ielen &&
2124 !ieee80211_id_in_list(after_ric, n_after_ric,
2125 ies[pos]))
2126 pos += 2 + ies[pos + 1];
2127 } else {
2128 pos += 2 + ies[pos + 1];
2129 }
2130 }
Johannes Berg8e664fb2009-12-23 13:15:38 +01002131
2132 return pos;
2133}
Johannes Berg8ed28742014-10-27 12:03:19 +01002134
2135size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2136 const u8 *ids, int n_ids, size_t offset)
2137{
2138 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2139}
Andrei Otcheretianskia7f3a762014-10-22 15:22:49 +03002140EXPORT_SYMBOL(ieee80211_ie_split);
Johannes Berg8e664fb2009-12-23 13:15:38 +01002141
2142size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2143{
2144 size_t pos = offset;
2145
2146 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2147 pos += 2 + ies[pos + 1];
2148
2149 return pos;
2150}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07002151
2152static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2153 int rssi_min_thold,
2154 int rssi_max_thold)
2155{
2156 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2157
2158 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2159 return;
2160
2161 /*
2162 * Scale up threshold values before storing it, as the RSSI averaging
2163 * algorithm uses a scaled up value as well. Change this scaling
2164 * factor if the RSSI averaging algorithm changes.
2165 */
2166 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2167 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2168}
2169
2170void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2171 int rssi_min_thold,
2172 int rssi_max_thold)
2173{
2174 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2175
2176 WARN_ON(rssi_min_thold == rssi_max_thold ||
2177 rssi_min_thold > rssi_max_thold);
2178
2179 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2180 rssi_max_thold);
2181}
2182EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2183
2184void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2185{
2186 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2187
2188 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2189}
2190EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db3432011-09-28 14:12:51 +03002191
Ben Greearef96a8422011-11-18 11:32:00 -08002192u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07002193 u16 cap)
2194{
2195 __le16 tmp;
2196
2197 *pos++ = WLAN_EID_HT_CAPABILITY;
2198 *pos++ = sizeof(struct ieee80211_ht_cap);
2199 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2200
2201 /* capability flags */
2202 tmp = cpu_to_le16(cap);
2203 memcpy(pos, &tmp, sizeof(u16));
2204 pos += sizeof(u16);
2205
2206 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08002207 *pos++ = ht_cap->ampdu_factor |
2208 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07002209 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2210
2211 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08002212 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2213 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002214
2215 /* extended capabilities */
2216 pos += sizeof(__le16);
2217
2218 /* BF capabilities */
2219 pos += sizeof(__le32);
2220
2221 /* antenna selection */
2222 pos += sizeof(u8);
2223
2224 return pos;
2225}
2226
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002227u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
Johannes Bergcc3983d2012-12-07 12:45:06 +01002228 u32 cap)
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002229{
2230 __le32 tmp;
2231
2232 *pos++ = WLAN_EID_VHT_CAPABILITY;
Mahesh Palivelad4950282012-10-10 11:25:40 +00002233 *pos++ = sizeof(struct ieee80211_vht_cap);
2234 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002235
2236 /* capability flags */
2237 tmp = cpu_to_le32(cap);
2238 memcpy(pos, &tmp, sizeof(u32));
2239 pos += sizeof(u32);
2240
2241 /* VHT MCS set */
2242 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2243 pos += sizeof(vht_cap->vht_mcs);
2244
2245 return pos;
2246}
2247
Johannes Berg074d46d2012-03-15 19:45:16 +01002248u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Johannes Berg4bf88532012-11-09 11:39:59 +01002249 const struct cfg80211_chan_def *chandef,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002250 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002251{
Johannes Berg074d46d2012-03-15 19:45:16 +01002252 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002253 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01002254 *pos++ = WLAN_EID_HT_OPERATION;
2255 *pos++ = sizeof(struct ieee80211_ht_operation);
2256 ht_oper = (struct ieee80211_ht_operation *)pos;
Johannes Berg4bf88532012-11-09 11:39:59 +01002257 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2258 chandef->chan->center_freq);
2259 switch (chandef->width) {
2260 case NL80211_CHAN_WIDTH_160:
2261 case NL80211_CHAN_WIDTH_80P80:
2262 case NL80211_CHAN_WIDTH_80:
2263 case NL80211_CHAN_WIDTH_40:
2264 if (chandef->center_freq1 > chandef->chan->center_freq)
2265 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2266 else
2267 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002268 break;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002269 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01002270 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002271 break;
2272 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07002273 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
Johannes Berg4bf88532012-11-09 11:39:59 +01002274 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2275 chandef->width != NL80211_CHAN_WIDTH_20)
Johannes Berg074d46d2012-03-15 19:45:16 +01002276 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01002277
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002278 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01002279 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002280
2281 /* It seems that Basic MCS set and Supported MCS set
2282 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01002283 memset(&ht_oper->basic_set, 0, 16);
2284 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002285
Johannes Berg074d46d2012-03-15 19:45:16 +01002286 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002287}
2288
Johannes Berg4bf88532012-11-09 11:39:59 +01002289void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
Johannes Berg4a3cb702013-02-12 16:43:19 +01002290 const struct ieee80211_ht_operation *ht_oper,
Johannes Berg4bf88532012-11-09 11:39:59 +01002291 struct cfg80211_chan_def *chandef)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002292{
2293 enum nl80211_channel_type channel_type;
2294
Johannes Berg4bf88532012-11-09 11:39:59 +01002295 if (!ht_oper) {
2296 cfg80211_chandef_create(chandef, control_chan,
2297 NL80211_CHAN_NO_HT);
2298 return;
2299 }
Alexander Simon42e7aa72011-10-26 14:47:26 -07002300
Johannes Berg074d46d2012-03-15 19:45:16 +01002301 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07002302 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2303 channel_type = NL80211_CHAN_HT20;
2304 break;
2305 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2306 channel_type = NL80211_CHAN_HT40PLUS;
2307 break;
2308 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2309 channel_type = NL80211_CHAN_HT40MINUS;
2310 break;
2311 default:
2312 channel_type = NL80211_CHAN_NO_HT;
2313 }
2314
Johannes Berg4bf88532012-11-09 11:39:59 +01002315 cfg80211_chandef_create(chandef, control_chan, channel_type);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002316}
2317
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002318int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2319 const struct ieee80211_supported_band *sband,
2320 const u8 *srates, int srates_len, u32 *rates)
2321{
2322 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2323 int shift = ieee80211_chandef_get_shift(chandef);
2324 struct ieee80211_rate *br;
2325 int brate, rate, i, j, count = 0;
2326
2327 *rates = 0;
2328
2329 for (i = 0; i < srates_len; i++) {
2330 rate = srates[i] & 0x7f;
2331
2332 for (j = 0; j < sband->n_bitrates; j++) {
2333 br = &sband->bitrates[j];
2334 if ((rate_flags & br->flags) != rate_flags)
2335 continue;
2336
2337 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2338 if (brate == rate) {
2339 *rates |= BIT(j);
2340 count++;
2341 break;
2342 }
2343 }
2344 }
2345 return count;
2346}
2347
Johannes Bergfc8a7322012-06-28 10:33:25 +02002348int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002349 struct sk_buff *skb, bool need_basic,
2350 enum ieee80211_band band)
Arik Nemtsov768db3432011-09-28 14:12:51 +03002351{
Arik Nemtsov768db3432011-09-28 14:12:51 +03002352 struct ieee80211_local *local = sdata->local;
2353 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002354 int rate, shift;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002355 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002356 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002357 u32 rate_flags;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002358
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002359 shift = ieee80211_vif_get_shift(&sdata->vif);
2360 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
Johannes Berg6b778632012-07-23 14:53:27 +02002361 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002362 rates = 0;
2363 for (i = 0; i < sband->n_bitrates; i++) {
2364 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2365 continue;
2366 rates++;
2367 }
Arik Nemtsov768db3432011-09-28 14:12:51 +03002368 if (rates > 8)
2369 rates = 8;
2370
2371 if (skb_tailroom(skb) < rates + 2)
2372 return -ENOMEM;
2373
2374 pos = skb_put(skb, rates + 2);
2375 *pos++ = WLAN_EID_SUPP_RATES;
2376 *pos++ = rates;
2377 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002378 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002379 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2380 continue;
2381
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002382 if (need_basic && basic_rates & BIT(i))
2383 basic = 0x80;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002384 rate = sband->bitrates[i].bitrate;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002385 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2386 5 * (1 << shift));
2387 *pos++ = basic | (u8) rate;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002388 }
2389
2390 return 0;
2391}
2392
Johannes Bergfc8a7322012-06-28 10:33:25 +02002393int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002394 struct sk_buff *skb, bool need_basic,
2395 enum ieee80211_band band)
Arik Nemtsov768db3432011-09-28 14:12:51 +03002396{
Arik Nemtsov768db3432011-09-28 14:12:51 +03002397 struct ieee80211_local *local = sdata->local;
2398 struct ieee80211_supported_band *sband;
Chun-Yeow Yeohcc63ec72013-09-07 23:40:44 -07002399 int rate, shift;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002400 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002401 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002402 u32 rate_flags;
2403
2404 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2405 shift = ieee80211_vif_get_shift(&sdata->vif);
Arik Nemtsov768db3432011-09-28 14:12:51 +03002406
Johannes Berg6b778632012-07-23 14:53:27 +02002407 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002408 exrates = 0;
2409 for (i = 0; i < sband->n_bitrates; i++) {
2410 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2411 continue;
2412 exrates++;
2413 }
2414
Arik Nemtsov768db3432011-09-28 14:12:51 +03002415 if (exrates > 8)
2416 exrates -= 8;
2417 else
2418 exrates = 0;
2419
2420 if (skb_tailroom(skb) < exrates + 2)
2421 return -ENOMEM;
2422
2423 if (exrates) {
2424 pos = skb_put(skb, exrates + 2);
2425 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2426 *pos++ = exrates;
2427 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002428 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002429 if ((rate_flags & sband->bitrates[i].flags)
2430 != rate_flags)
2431 continue;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002432 if (need_basic && basic_rates & BIT(i))
2433 basic = 0x80;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002434 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2435 5 * (1 << shift));
2436 *pos++ = basic | (u8) rate;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002437 }
2438 }
2439 return 0;
2440}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002441
2442int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2443{
2444 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2446
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07002447 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2448 /* non-managed type inferfaces */
2449 return 0;
2450 }
Emmanuel Grumbach3a7bba62013-03-20 17:05:45 +02002451 return ifmgd->ave_beacon_signal / 16;
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002452}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07002453EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
Johannes Berg04ecd252012-09-11 14:34:12 +02002454
2455u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2456{
2457 if (!mcs)
2458 return 1;
2459
2460 /* TODO: consider rx_highest */
2461
2462 if (mcs->rx_mask[3])
2463 return 4;
2464 if (mcs->rx_mask[2])
2465 return 3;
2466 if (mcs->rx_mask[1])
2467 return 2;
2468 return 1;
2469}
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002470
2471/**
2472 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2473 * @local: mac80211 hw info struct
2474 * @status: RX status
2475 * @mpdu_len: total MPDU length (including FCS)
2476 * @mpdu_offset: offset into MPDU to calculate timestamp at
2477 *
2478 * This function calculates the RX timestamp at the given MPDU offset, taking
2479 * into account what the RX timestamp was. An offset of 0 will just normalize
2480 * the timestamp to TSF at beginning of MPDU reception.
2481 */
2482u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2483 struct ieee80211_rx_status *status,
2484 unsigned int mpdu_len,
2485 unsigned int mpdu_offset)
2486{
2487 u64 ts = status->mactime;
2488 struct rate_info ri;
2489 u16 rate;
2490
2491 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2492 return 0;
2493
2494 memset(&ri, 0, sizeof(ri));
2495
2496 /* Fill cfg80211 rate info */
2497 if (status->flag & RX_FLAG_HT) {
2498 ri.mcs = status->rate_idx;
2499 ri.flags |= RATE_INFO_FLAGS_MCS;
2500 if (status->flag & RX_FLAG_40MHZ)
2501 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2502 if (status->flag & RX_FLAG_SHORT_GI)
2503 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Johannes Berg56146182012-11-09 15:07:02 +01002504 } else if (status->flag & RX_FLAG_VHT) {
2505 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2506 ri.mcs = status->rate_idx;
2507 ri.nss = status->vht_nss;
2508 if (status->flag & RX_FLAG_40MHZ)
2509 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002510 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002511 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002512 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002513 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002514 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002515 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2516 if (status->flag & RX_FLAG_SHORT_GI)
2517 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002518 } else {
2519 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002520 int shift = 0;
2521 int bitrate;
2522
2523 if (status->flag & RX_FLAG_10MHZ)
2524 shift = 1;
2525 if (status->flag & RX_FLAG_5MHZ)
2526 shift = 2;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002527
2528 sband = local->hw.wiphy->bands[status->band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002529 bitrate = sband->bitrates[status->rate_idx].bitrate;
2530 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002531 }
2532
2533 rate = cfg80211_calculate_bitrate(&ri);
Johannes Bergd86aa4f2013-10-11 15:47:06 +02002534 if (WARN_ONCE(!rate,
2535 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2536 status->flag, status->rate_idx, status->vht_nss))
2537 return 0;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002538
2539 /* rewind from end of MPDU */
2540 if (status->flag & RX_FLAG_MACTIME_END)
2541 ts -= mpdu_len * 8 * 10 / rate;
2542
2543 ts += mpdu_offset * 8 * 10 / rate;
2544
2545 return ts;
2546}
Simon Wunderlich164eb022013-02-08 18:16:20 +01002547
2548void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2549{
2550 struct ieee80211_sub_if_data *sdata;
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002551 struct cfg80211_chan_def chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002552
Johannes Berg34a37402013-12-18 09:43:33 +01002553 mutex_lock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002554 mutex_lock(&local->iflist_mtx);
2555 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg34a37402013-12-18 09:43:33 +01002556 /* it might be waiting for the local->mtx, but then
2557 * by the time it gets it, sdata->wdev.cac_started
2558 * will no longer be true
2559 */
2560 cancel_delayed_work(&sdata->dfs_cac_timer_work);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002561
2562 if (sdata->wdev.cac_started) {
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002563 chandef = sdata->vif.bss_conf.chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002564 ieee80211_vif_release_channel(sdata);
2565 cfg80211_cac_event(sdata->dev,
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002566 &chandef,
Simon Wunderlich164eb022013-02-08 18:16:20 +01002567 NL80211_RADAR_CAC_ABORTED,
2568 GFP_KERNEL);
2569 }
2570 }
2571 mutex_unlock(&local->iflist_mtx);
Johannes Berg34a37402013-12-18 09:43:33 +01002572 mutex_unlock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002573}
2574
2575void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2576{
2577 struct ieee80211_local *local =
2578 container_of(work, struct ieee80211_local, radar_detected_work);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002579 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
Michal Kazior486cf4c2014-10-10 12:43:23 +02002580 struct ieee80211_chanctx *ctx;
2581 int num_chanctx = 0;
2582
2583 mutex_lock(&local->chanctx_mtx);
2584 list_for_each_entry(ctx, &local->chanctx_list, list) {
2585 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2586 continue;
2587
2588 num_chanctx++;
2589 chandef = ctx->conf.def;
2590 }
2591 mutex_unlock(&local->chanctx_mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002592
2593 ieee80211_dfs_cac_cancel(local);
2594
Michal Kazior486cf4c2014-10-10 12:43:23 +02002595 if (num_chanctx > 1)
2596 /* XXX: multi-channel is not supported yet */
Simon Wunderlich164eb022013-02-08 18:16:20 +01002597 WARN_ON(1);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002598 else
Simon Wunderlich164eb022013-02-08 18:16:20 +01002599 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002600}
2601
2602void ieee80211_radar_detected(struct ieee80211_hw *hw)
2603{
2604 struct ieee80211_local *local = hw_to_local(hw);
2605
2606 trace_api_radar_detected(local);
2607
2608 ieee80211_queue_work(hw, &local->radar_detected_work);
2609}
2610EXPORT_SYMBOL(ieee80211_radar_detected);
Simon Wunderliche6b7cde2013-08-28 13:41:29 +02002611
2612u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2613{
2614 u32 ret;
2615 int tmp;
2616
2617 switch (c->width) {
2618 case NL80211_CHAN_WIDTH_20:
2619 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2620 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2621 break;
2622 case NL80211_CHAN_WIDTH_40:
2623 c->width = NL80211_CHAN_WIDTH_20;
2624 c->center_freq1 = c->chan->center_freq;
2625 ret = IEEE80211_STA_DISABLE_40MHZ |
2626 IEEE80211_STA_DISABLE_VHT;
2627 break;
2628 case NL80211_CHAN_WIDTH_80:
2629 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2630 /* n_P40 */
2631 tmp /= 2;
2632 /* freq_P40 */
2633 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2634 c->width = NL80211_CHAN_WIDTH_40;
2635 ret = IEEE80211_STA_DISABLE_VHT;
2636 break;
2637 case NL80211_CHAN_WIDTH_80P80:
2638 c->center_freq2 = 0;
2639 c->width = NL80211_CHAN_WIDTH_80;
2640 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2641 IEEE80211_STA_DISABLE_160MHZ;
2642 break;
2643 case NL80211_CHAN_WIDTH_160:
2644 /* n_P20 */
2645 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2646 /* n_P80 */
2647 tmp /= 4;
2648 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2649 c->width = NL80211_CHAN_WIDTH_80;
2650 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2651 IEEE80211_STA_DISABLE_160MHZ;
2652 break;
2653 default:
2654 case NL80211_CHAN_WIDTH_20_NOHT:
2655 WARN_ON_ONCE(1);
2656 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2657 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2658 break;
2659 case NL80211_CHAN_WIDTH_5:
2660 case NL80211_CHAN_WIDTH_10:
2661 WARN_ON_ONCE(1);
2662 /* keep c->width */
2663 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2664 break;
2665 }
2666
2667 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2668
2669 return ret;
2670}
Emmanuel Grumbach687da132013-10-01 16:45:43 +03002671
2672/*
2673 * Returns true if smps_mode_new is strictly more restrictive than
2674 * smps_mode_old.
2675 */
2676bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2677 enum ieee80211_smps_mode smps_mode_new)
2678{
2679 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2680 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2681 return false;
2682
2683 switch (smps_mode_old) {
2684 case IEEE80211_SMPS_STATIC:
2685 return false;
2686 case IEEE80211_SMPS_DYNAMIC:
2687 return smps_mode_new == IEEE80211_SMPS_STATIC;
2688 case IEEE80211_SMPS_OFF:
2689 return smps_mode_new != IEEE80211_SMPS_OFF;
2690 default:
2691 WARN_ON(1);
2692 }
2693
2694 return false;
2695}
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002696
2697int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2698 struct cfg80211_csa_settings *csa_settings)
2699{
2700 struct sk_buff *skb;
2701 struct ieee80211_mgmt *mgmt;
2702 struct ieee80211_local *local = sdata->local;
2703 int freq;
2704 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2705 sizeof(mgmt->u.action.u.chan_switch);
2706 u8 *pos;
2707
2708 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2709 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2710 return -EOPNOTSUPP;
2711
2712 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2713 5 + /* channel switch announcement element */
2714 3 + /* secondary channel offset element */
2715 8); /* mesh channel switch parameters element */
2716 if (!skb)
2717 return -ENOMEM;
2718
2719 skb_reserve(skb, local->tx_headroom);
2720 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2721 memset(mgmt, 0, hdr_len);
2722 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2723 IEEE80211_STYPE_ACTION);
2724
2725 eth_broadcast_addr(mgmt->da);
2726 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2727 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2728 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2729 } else {
2730 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2731 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2732 }
2733 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2734 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2735 pos = skb_put(skb, 5);
2736 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2737 *pos++ = 3; /* IE length */
2738 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2739 freq = csa_settings->chandef.chan->center_freq;
2740 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2741 *pos++ = csa_settings->count; /* count */
2742
2743 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2744 enum nl80211_channel_type ch_type;
2745
2746 skb_put(skb, 3);
2747 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2748 *pos++ = 1; /* IE length */
2749 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2750 if (ch_type == NL80211_CHAN_HT40PLUS)
2751 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2752 else
2753 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2754 }
2755
2756 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2757 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002758
2759 skb_put(skb, 8);
2760 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2761 *pos++ = 6; /* IE length */
2762 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2763 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2764 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2765 *pos++ |= csa_settings->block_tx ?
2766 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2767 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2768 pos += 2;
Chun-Yeow Yeohca91dc92013-11-12 10:31:48 +08002769 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002770 pos += 2;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002771 }
2772
2773 ieee80211_tx_skb(sdata, skb);
2774 return 0;
2775}
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002776
2777bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2778{
2779 return !(cs == NULL || cs->cipher == 0 ||
2780 cs->hdr_len < cs->pn_len + cs->pn_off ||
2781 cs->hdr_len <= cs->key_idx_off ||
2782 cs->key_idx_shift > 7 ||
2783 cs->key_idx_mask == 0);
2784}
2785
2786bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2787{
2788 int i;
2789
2790 /* Ensure we have enough iftype bitmap space for all iftype values */
2791 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2792
2793 for (i = 0; i < n; i++)
2794 if (!ieee80211_cs_valid(&cs[i]))
2795 return false;
2796
2797 return true;
2798}
2799
2800const struct ieee80211_cipher_scheme *
2801ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2802 enum nl80211_iftype iftype)
2803{
2804 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2805 int n = local->hw.n_cipher_schemes;
2806 int i;
2807 const struct ieee80211_cipher_scheme *cs = NULL;
2808
2809 for (i = 0; i < n; i++) {
2810 if (l[i].cipher == cipher) {
2811 cs = &l[i];
2812 break;
2813 }
2814 }
2815
2816 if (!cs || !(cs->iftype & BIT(iftype)))
2817 return NULL;
2818
2819 return cs;
2820}
2821
2822int ieee80211_cs_headroom(struct ieee80211_local *local,
2823 struct cfg80211_crypto_settings *crypto,
2824 enum nl80211_iftype iftype)
2825{
2826 const struct ieee80211_cipher_scheme *cs;
2827 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2828 int i;
2829
2830 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2831 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2832 iftype);
2833
2834 if (cs && headroom < cs->hdr_len)
2835 headroom = cs->hdr_len;
2836 }
2837
2838 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2839 if (cs && headroom < cs->hdr_len)
2840 headroom = cs->hdr_len;
2841
2842 return headroom;
2843}
Felix Fietkaua7022e62013-12-16 21:49:14 +01002844
2845static bool
2846ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2847{
2848 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2849 int skip;
2850
2851 if (end > 0)
2852 return false;
2853
2854 /* End time is in the past, check for repetitions */
2855 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2856 if (data->count[i] < 255) {
2857 if (data->count[i] <= skip) {
2858 data->count[i] = 0;
2859 return false;
2860 }
2861
2862 data->count[i] -= skip;
2863 }
2864
2865 data->desc[i].start += skip * data->desc[i].interval;
2866
2867 return true;
2868}
2869
2870static bool
2871ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2872 s32 *offset)
2873{
2874 bool ret = false;
2875 int i;
2876
2877 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2878 s32 cur;
2879
2880 if (!data->count[i])
2881 continue;
2882
2883 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2884 ret = true;
2885
2886 cur = data->desc[i].start - tsf;
2887 if (cur > *offset)
2888 continue;
2889
2890 cur = data->desc[i].start + data->desc[i].duration - tsf;
2891 if (cur > *offset)
2892 *offset = cur;
2893 }
2894
2895 return ret;
2896}
2897
2898static u32
2899ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2900{
2901 s32 offset = 0;
2902 int tries = 0;
2903 /*
2904 * arbitrary limit, used to avoid infinite loops when combined NoA
2905 * descriptors cover the full time period.
2906 */
2907 int max_tries = 5;
2908
2909 ieee80211_extend_absent_time(data, tsf, &offset);
2910 do {
2911 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2912 break;
2913
2914 tries++;
2915 } while (tries < max_tries);
2916
2917 return offset;
2918}
2919
2920void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2921{
2922 u32 next_offset = BIT(31) - 1;
2923 int i;
2924
2925 data->absent = 0;
2926 data->has_next_tsf = false;
2927 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2928 s32 start;
2929
2930 if (!data->count[i])
2931 continue;
2932
2933 ieee80211_extend_noa_desc(data, tsf, i);
2934 start = data->desc[i].start - tsf;
2935 if (start <= 0)
2936 data->absent |= BIT(i);
2937
2938 if (next_offset > start)
2939 next_offset = start;
2940
2941 data->has_next_tsf = true;
2942 }
2943
2944 if (data->absent)
2945 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2946
2947 data->next_tsf = tsf + next_offset;
2948}
2949EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2950
2951int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2952 struct ieee80211_noa_data *data, u32 tsf)
2953{
2954 int ret = 0;
2955 int i;
2956
2957 memset(data, 0, sizeof(*data));
2958
2959 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2960 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2961
2962 if (!desc->count || !desc->duration)
2963 continue;
2964
2965 data->count[i] = desc->count;
2966 data->desc[i].start = le32_to_cpu(desc->start_time);
2967 data->desc[i].duration = le32_to_cpu(desc->duration);
2968 data->desc[i].interval = le32_to_cpu(desc->interval);
2969
2970 if (data->count[i] > 1 &&
2971 data->desc[i].interval < data->desc[i].duration)
2972 continue;
2973
2974 ieee80211_extend_noa_desc(data, tsf, i);
2975 ret++;
2976 }
2977
2978 if (ret)
2979 ieee80211_update_p2p_noa(data, tsf);
2980
2981 return ret;
2982}
2983EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
Thomas Pedersen057d5f42013-12-19 10:25:15 -08002984
2985void ieee80211_recalc_dtim(struct ieee80211_local *local,
2986 struct ieee80211_sub_if_data *sdata)
2987{
2988 u64 tsf = drv_get_tsf(local, sdata);
2989 u64 dtim_count = 0;
2990 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2991 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2992 struct ps_data *ps;
2993 u8 bcns_from_dtim;
2994
2995 if (tsf == -1ULL || !beacon_int || !dtim_period)
2996 return;
2997
2998 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2999 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3000 if (!sdata->bss)
3001 return;
3002
3003 ps = &sdata->bss->ps;
3004 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3005 ps = &sdata->u.mesh.ps;
3006 } else {
3007 return;
3008 }
3009
3010 /*
3011 * actually finds last dtim_count, mac80211 will update in
3012 * __beacon_add_tim().
3013 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3014 */
3015 do_div(tsf, beacon_int);
3016 bcns_from_dtim = do_div(tsf, dtim_period);
3017 /* just had a DTIM */
3018 if (!bcns_from_dtim)
3019 dtim_count = 0;
3020 else
3021 dtim_count = dtim_period - bcns_from_dtim;
3022
3023 ps->dtim_count = dtim_count;
3024}
Luciano Coelho73de86a2014-02-13 11:31:59 +02003025
Michal Kazior71e61952014-06-25 12:35:07 +02003026static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3027 struct ieee80211_chanctx *ctx)
3028{
3029 struct ieee80211_sub_if_data *sdata;
3030 u8 radar_detect = 0;
3031
3032 lockdep_assert_held(&local->chanctx_mtx);
3033
3034 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3035 return 0;
3036
3037 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3038 if (sdata->reserved_radar_required)
3039 radar_detect |= BIT(sdata->reserved_chandef.width);
3040
3041 /*
3042 * An in-place reservation context should not have any assigned vifs
3043 * until it replaces the other context.
3044 */
3045 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3046 !list_empty(&ctx->assigned_vifs));
3047
3048 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3049 if (sdata->radar_required)
3050 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3051
3052 return radar_detect;
3053}
3054
Luciano Coelho73de86a2014-02-13 11:31:59 +02003055int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3056 const struct cfg80211_chan_def *chandef,
3057 enum ieee80211_chanctx_mode chanmode,
3058 u8 radar_detect)
3059{
3060 struct ieee80211_local *local = sdata->local;
3061 struct ieee80211_sub_if_data *sdata_iter;
3062 enum nl80211_iftype iftype = sdata->wdev.iftype;
3063 int num[NUM_NL80211_IFTYPES];
3064 struct ieee80211_chanctx *ctx;
Luciano Coelhob6a55012014-02-27 11:07:21 +02003065 int num_different_channels = 0;
Luciano Coelho73de86a2014-02-13 11:31:59 +02003066 int total = 1;
3067
3068 lockdep_assert_held(&local->chanctx_mtx);
3069
3070 if (WARN_ON(hweight32(radar_detect) > 1))
3071 return -EINVAL;
3072
Luciano Coelhob6a55012014-02-27 11:07:21 +02003073 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3074 !chandef->chan))
Luciano Coelho73de86a2014-02-13 11:31:59 +02003075 return -EINVAL;
3076
Luciano Coelhob6a55012014-02-27 11:07:21 +02003077 if (chandef)
3078 num_different_channels = 1;
3079
Luciano Coelho73de86a2014-02-13 11:31:59 +02003080 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3081 return -EINVAL;
3082
3083 /* Always allow software iftypes */
3084 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3085 if (radar_detect)
3086 return -EINVAL;
3087 return 0;
3088 }
3089
3090 memset(num, 0, sizeof(num));
3091
3092 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3093 num[iftype] = 1;
3094
3095 list_for_each_entry(ctx, &local->chanctx_list, list) {
Michal Kazior5bcae312014-06-25 12:35:06 +02003096 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3097 continue;
Michal Kazior71e61952014-06-25 12:35:07 +02003098 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
Luciano Coelho73de86a2014-02-13 11:31:59 +02003099 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3100 num_different_channels++;
3101 continue;
3102 }
Luciano Coelhob6a55012014-02-27 11:07:21 +02003103 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
Luciano Coelho73de86a2014-02-13 11:31:59 +02003104 cfg80211_chandef_compatible(chandef,
3105 &ctx->conf.def))
3106 continue;
3107 num_different_channels++;
3108 }
3109
3110 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3111 struct wireless_dev *wdev_iter;
3112
3113 wdev_iter = &sdata_iter->wdev;
3114
3115 if (sdata_iter == sdata ||
3116 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3117 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3118 continue;
3119
3120 num[wdev_iter->iftype]++;
3121 total++;
3122 }
3123
3124 if (total == 1 && !radar_detect)
3125 return 0;
3126
3127 return cfg80211_check_combinations(local->hw.wiphy,
3128 num_different_channels,
3129 radar_detect, num);
3130}
Michal Kazior6fa001b2014-04-09 15:29:23 +02003131
3132static void
3133ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3134 void *data)
3135{
3136 u32 *max_num_different_channels = data;
3137
3138 *max_num_different_channels = max(*max_num_different_channels,
3139 c->num_different_channels);
3140}
3141
3142int ieee80211_max_num_channels(struct ieee80211_local *local)
3143{
3144 struct ieee80211_sub_if_data *sdata;
3145 int num[NUM_NL80211_IFTYPES] = {};
3146 struct ieee80211_chanctx *ctx;
3147 int num_different_channels = 0;
3148 u8 radar_detect = 0;
3149 u32 max_num_different_channels = 1;
3150 int err;
3151
3152 lockdep_assert_held(&local->chanctx_mtx);
3153
3154 list_for_each_entry(ctx, &local->chanctx_list, list) {
Michal Kazior5bcae312014-06-25 12:35:06 +02003155 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3156 continue;
3157
Michal Kazior6fa001b2014-04-09 15:29:23 +02003158 num_different_channels++;
3159
Michal Kazior71e61952014-06-25 12:35:07 +02003160 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
Michal Kazior6fa001b2014-04-09 15:29:23 +02003161 }
3162
3163 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3164 num[sdata->wdev.iftype]++;
3165
3166 err = cfg80211_iter_combinations(local->hw.wiphy,
3167 num_different_channels, radar_detect,
3168 num, ieee80211_iter_max_chans,
3169 &max_num_different_channels);
3170 if (err < 0)
3171 return err;
3172
3173 return max_num_different_channels;
3174}
Arik Nemtsov40b861a2014-07-17 17:14:23 +03003175
3176u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3177{
3178 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3179 *buf++ = 7; /* len */
3180 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3181 *buf++ = 0x50;
3182 *buf++ = 0xf2;
3183 *buf++ = 2; /* WME */
3184 *buf++ = 0; /* WME info */
3185 *buf++ = 1; /* WME ver */
3186 *buf++ = qosinfo; /* U-APSD no in use */
3187
3188 return buf;
3189}