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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
Felix Fietkauba8c3d62015-03-27 21:30:37 +0100311 if (local->ops->wake_tx_queue &&
312 (atomic_read(&sdata->txqs_len[ac]) >
313 local->hw.txq_ac_max_pending))
314 continue;
315
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200316 if (ac_queue == queue ||
317 (sdata->vif.cab_queue == queue &&
318 local->queue_stop_reasons[ac_queue] == 0 &&
319 skb_queue_empty(&local->pending[ac_queue])))
320 netif_wake_subqueue(sdata->dev, ac);
321 }
322 }
323}
324
Kalle Valoce7c9112008-12-18 23:35:20 +0200325static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300326 enum queue_stop_reason reason,
327 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200328{
329 struct ieee80211_local *local = hw_to_local(hw);
330
Johannes Bergb5878a22010-04-07 16:48:40 +0200331 trace_wake_queue(local, queue, reason);
332
Johannes Berge4e72fb2009-03-23 17:28:42 +0100333 if (WARN_ON(queue >= hw->queues))
334 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200335
Johannes Bergada15122012-03-28 11:04:27 +0200336 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
337 return;
338
Luciano Coelhocca07b02014-06-13 16:30:05 +0300339 if (!refcounted)
340 local->q_stop_reasons[queue][reason] = 0;
341 else
342 local->q_stop_reasons[queue][reason]--;
343
344 if (local->q_stop_reasons[queue][reason] == 0)
345 __clear_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Berg96f5e662009-02-12 00:51:53 +0100346
347 if (local->queue_stop_reasons[queue] != 0)
348 /* someone still has this queue stopped */
349 return;
350
Johannes Berg7236fe22010-03-22 13:42:43 -0700351 if (skb_queue_empty(&local->pending[queue])) {
352 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200353 ieee80211_propagate_queue_wake(local, queue);
Johannes Berg7236fe22010-03-22 13:42:43 -0700354 rcu_read_unlock();
355 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200356 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200357}
Kalle Valoce7c9112008-12-18 23:35:20 +0200358
Johannes Berg96f5e662009-02-12 00:51:53 +0100359void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300360 enum queue_stop_reason reason,
361 bool refcounted)
Kalle Valoce7c9112008-12-18 23:35:20 +0200362{
363 struct ieee80211_local *local = hw_to_local(hw);
364 unsigned long flags;
365
366 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300367 __ieee80211_wake_queue(hw, queue, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200368 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
369}
370
371void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
372{
373 ieee80211_wake_queue_by_reason(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300374 IEEE80211_QUEUE_STOP_REASON_DRIVER,
375 false);
Kalle Valoce7c9112008-12-18 23:35:20 +0200376}
Johannes Bergc2d15602007-07-27 15:43:23 +0200377EXPORT_SYMBOL(ieee80211_wake_queue);
378
Kalle Valoce7c9112008-12-18 23:35:20 +0200379static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300380 enum queue_stop_reason reason,
381 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200382{
383 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100384 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200385 int n_acs = IEEE80211_NUM_ACS;
Johannes Bergc2d15602007-07-27 15:43:23 +0200386
Johannes Bergb5878a22010-04-07 16:48:40 +0200387 trace_stop_queue(local, queue, reason);
388
Johannes Berge4e72fb2009-03-23 17:28:42 +0100389 if (WARN_ON(queue >= hw->queues))
390 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100391
Luciano Coelhocca07b02014-06-13 16:30:05 +0300392 if (!refcounted)
393 local->q_stop_reasons[queue][reason] = 1;
394 else
395 local->q_stop_reasons[queue][reason]++;
Johannes Bergada15122012-03-28 11:04:27 +0200396
Luciano Coelhocca07b02014-06-13 16:30:05 +0300397 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
398 return;
Johannes Bergcf0277e2010-01-05 18:00:58 +0100399
Johannes Berga6f38ac2012-07-04 12:49:59 +0200400 if (local->hw.queues < IEEE80211_NUM_ACS)
401 n_acs = 1;
402
Johannes Bergcf0277e2010-01-05 18:00:58 +0100403 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200404 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
405 int ac;
406
Johannes Bergf142c6b2012-06-18 20:07:15 +0200407 if (!sdata->dev)
408 continue;
409
Johannes Berga6f38ac2012-07-04 12:49:59 +0200410 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200411 if (sdata->vif.hw_queue[ac] == queue ||
412 sdata->vif.cab_queue == queue)
413 netif_stop_subqueue(sdata->dev, ac);
414 }
415 }
Johannes Bergcf0277e2010-01-05 18:00:58 +0100416 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200417}
Kalle Valoce7c9112008-12-18 23:35:20 +0200418
Johannes Berg96f5e662009-02-12 00:51:53 +0100419void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300420 enum queue_stop_reason reason,
421 bool refcounted)
Kalle Valoce7c9112008-12-18 23:35:20 +0200422{
423 struct ieee80211_local *local = hw_to_local(hw);
424 unsigned long flags;
425
426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300427 __ieee80211_stop_queue(hw, queue, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200428 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
429}
430
431void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
432{
433 ieee80211_stop_queue_by_reason(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300434 IEEE80211_QUEUE_STOP_REASON_DRIVER,
435 false);
Kalle Valoce7c9112008-12-18 23:35:20 +0200436}
Johannes Bergc2d15602007-07-27 15:43:23 +0200437EXPORT_SYMBOL(ieee80211_stop_queue);
438
Johannes Berg8f77f382009-06-07 21:58:37 +0200439void ieee80211_add_pending_skb(struct ieee80211_local *local,
440 struct sk_buff *skb)
441{
442 struct ieee80211_hw *hw = &local->hw;
443 unsigned long flags;
Johannes Berga7bc3762009-07-27 10:33:31 +0200444 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200445 int queue = info->hw_queue;
Johannes Berga7bc3762009-07-27 10:33:31 +0200446
447 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200448 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200449 return;
450 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200451
452 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300453 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
454 false);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200455 __skb_queue_tail(&local->pending[queue], skb);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300456 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
457 false);
Johannes Berg8f77f382009-06-07 21:58:37 +0200458 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
459}
460
Johannes Berge3685e02014-02-20 11:19:58 +0100461void ieee80211_add_pending_skbs(struct ieee80211_local *local,
462 struct sk_buff_head *skbs)
Johannes Berg8f77f382009-06-07 21:58:37 +0200463{
464 struct ieee80211_hw *hw = &local->hw;
465 struct sk_buff *skb;
466 unsigned long flags;
Johannes Bergb0b97a82011-09-29 16:04:30 +0200467 int queue, i;
Johannes Berg8f77f382009-06-07 21:58:37 +0200468
469 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200470 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200471 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
472
473 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200474 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200475 continue;
476 }
477
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200478 queue = info->hw_queue;
Johannes Berg4644ae82012-03-28 11:04:28 +0200479
480 __ieee80211_stop_queue(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300481 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
482 false);
Johannes Berg4644ae82012-03-28 11:04:28 +0200483
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200484 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200485 }
486
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200487 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200488 __ieee80211_wake_queue(hw, i,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300489 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
490 false);
Johannes Berg8f77f382009-06-07 21:58:37 +0200491 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200492}
493
Kalle Valoce7c9112008-12-18 23:35:20 +0200494void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100495 unsigned long queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300496 enum queue_stop_reason reason,
497 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200498{
Kalle Valoce7c9112008-12-18 23:35:20 +0200499 struct ieee80211_local *local = hw_to_local(hw);
500 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200501 int i;
502
Kalle Valoce7c9112008-12-18 23:35:20 +0200503 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
504
Johannes Berg445ea4e2013-02-13 12:25:28 +0100505 for_each_set_bit(i, &queues, hw->queues)
Luciano Coelhocca07b02014-06-13 16:30:05 +0300506 __ieee80211_stop_queue(hw, i, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200507
508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
509}
510
511void ieee80211_stop_queues(struct ieee80211_hw *hw)
512{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100513 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300514 IEEE80211_QUEUE_STOP_REASON_DRIVER,
515 false);
Johannes Bergc2d15602007-07-27 15:43:23 +0200516}
517EXPORT_SYMBOL(ieee80211_stop_queues);
518
Tomas Winkler92ab8532008-07-24 21:02:04 +0300519int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
520{
521 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200522 unsigned long flags;
523 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100524
Johannes Berge4e72fb2009-03-23 17:28:42 +0100525 if (WARN_ON(queue >= hw->queues))
526 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100527
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200528 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Thomas Pedersen2419ea12013-04-10 15:41:40 -0700529 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
530 &local->queue_stop_reasons[queue]);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200531 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
532 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300533}
534EXPORT_SYMBOL(ieee80211_queue_stopped);
535
Kalle Valoce7c9112008-12-18 23:35:20 +0200536void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100537 unsigned long queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300538 enum queue_stop_reason reason,
539 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200540{
Kalle Valoce7c9112008-12-18 23:35:20 +0200541 struct ieee80211_local *local = hw_to_local(hw);
542 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200543 int i;
544
Kalle Valoce7c9112008-12-18 23:35:20 +0200545 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
546
Johannes Berg445ea4e2013-02-13 12:25:28 +0100547 for_each_set_bit(i, &queues, hw->queues)
Luciano Coelhocca07b02014-06-13 16:30:05 +0300548 __ieee80211_wake_queue(hw, i, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200549
550 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
551}
552
553void ieee80211_wake_queues(struct ieee80211_hw *hw)
554{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100555 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300556 IEEE80211_QUEUE_STOP_REASON_DRIVER,
557 false);
Johannes Bergc2d15602007-07-27 15:43:23 +0200558}
559EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100560
Luciano Coelho26da23b2014-06-13 16:30:06 +0300561static unsigned int
562ieee80211_get_vif_queues(struct ieee80211_local *local,
563 struct ieee80211_sub_if_data *sdata)
Johannes Berg39ecc012013-02-13 12:11:00 +0100564{
Luciano Coelho26da23b2014-06-13 16:30:06 +0300565 unsigned int queues;
Johannes Berg39ecc012013-02-13 12:11:00 +0100566
567 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
568 int ac;
569
570 queues = 0;
571
572 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
573 queues |= BIT(sdata->vif.hw_queue[ac]);
574 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
575 queues |= BIT(sdata->vif.cab_queue);
576 } else {
577 /* all queues */
578 queues = BIT(local->hw.queues) - 1;
579 }
580
Luciano Coelho26da23b2014-06-13 16:30:06 +0300581 return queues;
582}
583
Liad Kaufman4f9610d2014-11-09 18:50:21 +0200584void __ieee80211_flush_queues(struct ieee80211_local *local,
585 struct ieee80211_sub_if_data *sdata,
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +0200586 unsigned int queues, bool drop)
Luciano Coelho26da23b2014-06-13 16:30:06 +0300587{
Luciano Coelho26da23b2014-06-13 16:30:06 +0300588 if (!local->ops->flush)
589 return;
590
Liad Kaufman4f9610d2014-11-09 18:50:21 +0200591 /*
592 * If no queue was set, or if the HW doesn't support
593 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
594 */
595 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
596 queues = ieee80211_get_vif_queues(local, sdata);
Luciano Coelho26da23b2014-06-13 16:30:06 +0300597
Luciano Coelho59f48fe2014-06-13 16:30:04 +0300598 ieee80211_stop_queues_by_reason(&local->hw, queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300599 IEEE80211_QUEUE_STOP_REASON_FLUSH,
600 false);
Johannes Berg445ea4e2013-02-13 12:25:28 +0100601
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +0200602 drv_flush(local, sdata, queues, drop);
Johannes Berg445ea4e2013-02-13 12:25:28 +0100603
Luciano Coelho59f48fe2014-06-13 16:30:04 +0300604 ieee80211_wake_queues_by_reason(&local->hw, queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300605 IEEE80211_QUEUE_STOP_REASON_FLUSH,
606 false);
Johannes Berg39ecc012013-02-13 12:11:00 +0100607}
608
Liad Kaufman4f9610d2014-11-09 18:50:21 +0200609void ieee80211_flush_queues(struct ieee80211_local *local,
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +0200610 struct ieee80211_sub_if_data *sdata, bool drop)
Liad Kaufman4f9610d2014-11-09 18:50:21 +0200611{
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +0200612 __ieee80211_flush_queues(local, sdata, 0, drop);
Liad Kaufman4f9610d2014-11-09 18:50:21 +0200613}
614
Luciano Coelho26da23b2014-06-13 16:30:06 +0300615void ieee80211_stop_vif_queues(struct ieee80211_local *local,
616 struct ieee80211_sub_if_data *sdata,
617 enum queue_stop_reason reason)
618{
619 ieee80211_stop_queues_by_reason(&local->hw,
620 ieee80211_get_vif_queues(local, sdata),
621 reason, true);
622}
623
624void ieee80211_wake_vif_queues(struct ieee80211_local *local,
625 struct ieee80211_sub_if_data *sdata,
626 enum queue_stop_reason reason)
627{
628 ieee80211_wake_queues_by_reason(&local->hw,
629 ieee80211_get_vif_queues(local, sdata),
630 reason, true);
631}
632
Arik Nemtsov3384d752015-03-01 09:10:15 +0200633static void __iterate_interfaces(struct ieee80211_local *local,
634 u32 iter_flags,
635 void (*iterator)(void *data, u8 *mac,
636 struct ieee80211_vif *vif),
637 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100638{
Johannes Bergdabeb342007-11-09 01:57:29 +0100639 struct ieee80211_sub_if_data *sdata;
Arik Nemtsov3384d752015-03-01 09:10:15 +0200640 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
Johannes Bergdabeb342007-11-09 01:57:29 +0100641
Johannes Berge38bad42007-11-28 10:55:32 +0100642 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100643 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200644 case NL80211_IFTYPE_MONITOR:
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200645 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
646 continue;
647 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200648 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100649 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200650 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100651 break;
652 }
Johannes Berg8b2c9822012-11-06 20:23:30 +0100653 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
Arik Nemtsov3384d752015-03-01 09:10:15 +0200654 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg8b2c9822012-11-06 20:23:30 +0100655 continue;
Arik Nemtsov3384d752015-03-01 09:10:15 +0200656 if (ieee80211_sdata_running(sdata) || !active_only)
Johannes Berg47846c92009-11-25 17:46:19 +0100657 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100658 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100659 }
Johannes Berge38bad42007-11-28 10:55:32 +0100660
Johannes Bergc7c71062013-08-21 22:07:20 +0200661 sdata = rcu_dereference_check(local->monitor_sdata,
662 lockdep_is_held(&local->iflist_mtx) ||
663 lockdep_rtnl_is_held());
Johannes Berg8b2c9822012-11-06 20:23:30 +0100664 if (sdata &&
Arik Nemtsov3384d752015-03-01 09:10:15 +0200665 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
Johannes Berg8b2c9822012-11-06 20:23:30 +0100666 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg685fb722012-07-11 16:38:09 +0200667 iterator(data, sdata->vif.addr, &sdata->vif);
Johannes Bergc7c71062013-08-21 22:07:20 +0200668}
Johannes Berg685fb722012-07-11 16:38:09 +0200669
Arik Nemtsov3384d752015-03-01 09:10:15 +0200670void ieee80211_iterate_interfaces(
Johannes Bergc7c71062013-08-21 22:07:20 +0200671 struct ieee80211_hw *hw, u32 iter_flags,
672 void (*iterator)(void *data, u8 *mac,
673 struct ieee80211_vif *vif),
674 void *data)
675{
676 struct ieee80211_local *local = hw_to_local(hw);
677
678 mutex_lock(&local->iflist_mtx);
Arik Nemtsov3384d752015-03-01 09:10:15 +0200679 __iterate_interfaces(local, iter_flags, iterator, data);
Johannes Bergc7c71062013-08-21 22:07:20 +0200680 mutex_unlock(&local->iflist_mtx);
681}
Arik Nemtsov3384d752015-03-01 09:10:15 +0200682EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
Johannes Bergc7c71062013-08-21 22:07:20 +0200683
684void ieee80211_iterate_active_interfaces_atomic(
685 struct ieee80211_hw *hw, u32 iter_flags,
686 void (*iterator)(void *data, u8 *mac,
687 struct ieee80211_vif *vif),
688 void *data)
689{
690 struct ieee80211_local *local = hw_to_local(hw);
691
692 rcu_read_lock();
Arik Nemtsov3384d752015-03-01 09:10:15 +0200693 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
694 iterator, data);
Johannes Berge38bad42007-11-28 10:55:32 +0100695 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100696}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200697EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200698
Johannes Bergc7c71062013-08-21 22:07:20 +0200699void ieee80211_iterate_active_interfaces_rtnl(
700 struct ieee80211_hw *hw, u32 iter_flags,
701 void (*iterator)(void *data, u8 *mac,
702 struct ieee80211_vif *vif),
703 void *data)
704{
705 struct ieee80211_local *local = hw_to_local(hw);
706
707 ASSERT_RTNL();
708
Arik Nemtsov3384d752015-03-01 09:10:15 +0200709 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
710 iterator, data);
Johannes Bergc7c71062013-08-21 22:07:20 +0200711}
712EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
713
Arik Nemtsov0fc1e042014-10-22 12:30:59 +0300714static void __iterate_stations(struct ieee80211_local *local,
715 void (*iterator)(void *data,
716 struct ieee80211_sta *sta),
717 void *data)
718{
719 struct sta_info *sta;
720
721 list_for_each_entry_rcu(sta, &local->sta_list, list) {
722 if (!sta->uploaded)
723 continue;
724
725 iterator(data, &sta->sta);
726 }
727}
728
729void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
730 void (*iterator)(void *data,
731 struct ieee80211_sta *sta),
732 void *data)
733{
734 struct ieee80211_local *local = hw_to_local(hw);
735
736 rcu_read_lock();
737 __iterate_stations(local, iterator, data);
738 rcu_read_unlock();
739}
740EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
741
Johannes Bergad7e7182013-11-13 13:37:47 +0100742struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
743{
744 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
745
746 if (!ieee80211_sdata_running(sdata) ||
747 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
748 return NULL;
749 return &sdata->vif;
750}
751EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
752
Emmanuel Grumbachdc5a1ad2015-03-12 08:53:24 +0200753struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
754{
755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
756
757 if (!ieee80211_sdata_running(sdata) ||
758 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
759 return NULL;
760
761 return &sdata->wdev;
762}
763EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
764
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400765/*
766 * Nothing should have been stuffed into the workqueue during
Emmanuel Grumbach4afaff12015-01-22 23:32:46 +0200767 * the suspend->resume cycle. Since we can't check each caller
768 * of this function if we are already quiescing / suspended,
769 * check here and don't WARN since this can actually happen when
770 * the rx path (for example) is racing against __ieee80211_suspend
771 * and suspending / quiescing was set after the rx path checked
772 * them.
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400773 */
774static bool ieee80211_can_queue_work(struct ieee80211_local *local)
775{
Emmanuel Grumbach4afaff12015-01-22 23:32:46 +0200776 if (local->quiescing || (local->suspended && !local->resuming)) {
777 pr_warn("queueing ieee80211 work while going to suspend\n");
Johannes Bergceb99fe2009-11-19 14:29:39 +0100778 return false;
Emmanuel Grumbach4afaff12015-01-22 23:32:46 +0200779 }
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400780
781 return true;
782}
783
784void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
785{
786 struct ieee80211_local *local = hw_to_local(hw);
787
788 if (!ieee80211_can_queue_work(local))
789 return;
790
791 queue_work(local->workqueue, work);
792}
793EXPORT_SYMBOL(ieee80211_queue_work);
794
795void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
796 struct delayed_work *dwork,
797 unsigned long delay)
798{
799 struct ieee80211_local *local = hw_to_local(hw);
800
801 if (!ieee80211_can_queue_work(local))
802 return;
803
804 queue_delayed_work(local->workqueue, dwork, delay);
805}
806EXPORT_SYMBOL(ieee80211_queue_delayed_work);
807
Johannes Berg35d865a2013-05-28 10:54:03 +0200808u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
Johannes Bergdd769862011-11-18 16:54:50 +0100809 struct ieee802_11_elems *elems,
810 u64 filter, u32 crc)
811{
812 size_t left = len;
Johannes Berg35d865a2013-05-28 10:54:03 +0200813 const u8 *pos = start;
Johannes Bergdd769862011-11-18 16:54:50 +0100814 bool calc_crc = filter != 0;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800815 DECLARE_BITMAP(seen_elems, 256);
Johannes Bergb2e506b2013-03-26 14:54:16 +0100816 const u8 *ie;
Johannes Bergdd769862011-11-18 16:54:50 +0100817
Paul Stewartfcff4f12012-02-23 17:59:53 -0800818 bitmap_zero(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100819 memset(elems, 0, sizeof(*elems));
820 elems->ie_start = start;
821 elems->total_len = len;
822
823 while (left >= 2) {
824 u8 id, elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800825 bool elem_parse_failed;
Johannes Bergdd769862011-11-18 16:54:50 +0100826
827 id = *pos++;
828 elen = *pos++;
829 left -= 2;
830
Paul Stewartfcff4f12012-02-23 17:59:53 -0800831 if (elen > left) {
832 elems->parse_error = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100833 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800834 }
835
Johannes Berg9690fb12012-10-24 14:19:53 +0200836 switch (id) {
837 case WLAN_EID_SSID:
838 case WLAN_EID_SUPP_RATES:
839 case WLAN_EID_FH_PARAMS:
840 case WLAN_EID_DS_PARAMS:
841 case WLAN_EID_CF_PARAMS:
842 case WLAN_EID_TIM:
843 case WLAN_EID_IBSS_PARAMS:
844 case WLAN_EID_CHALLENGE:
845 case WLAN_EID_RSN:
846 case WLAN_EID_ERP_INFO:
847 case WLAN_EID_EXT_SUPP_RATES:
848 case WLAN_EID_HT_CAPABILITY:
849 case WLAN_EID_HT_OPERATION:
850 case WLAN_EID_VHT_CAPABILITY:
851 case WLAN_EID_VHT_OPERATION:
852 case WLAN_EID_MESH_ID:
853 case WLAN_EID_MESH_CONFIG:
854 case WLAN_EID_PEER_MGMT:
855 case WLAN_EID_PREQ:
856 case WLAN_EID_PREP:
857 case WLAN_EID_PERR:
858 case WLAN_EID_RANN:
859 case WLAN_EID_CHANNEL_SWITCH:
860 case WLAN_EID_EXT_CHANSWITCH_ANN:
861 case WLAN_EID_COUNTRY:
862 case WLAN_EID_PWR_CONSTRAINT:
863 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg85220d72013-03-25 18:29:27 +0100864 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100865 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -0700866 case WLAN_EID_CHAN_SWITCH_PARAM:
Arik Nemtsov9041c1f2014-11-09 18:50:15 +0200867 case WLAN_EID_EXT_CAPABILITY:
Arik Nemtsov53837582014-11-09 18:50:18 +0200868 case WLAN_EID_CHAN_SWITCH_TIMING:
869 case WLAN_EID_LINK_ID:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100870 /*
871 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
872 * that if the content gets bigger it might be needed more than once
873 */
Johannes Berg9690fb12012-10-24 14:19:53 +0200874 if (test_bit(id, seen_elems)) {
875 elems->parse_error = true;
876 left -= elen;
877 pos += elen;
878 continue;
879 }
880 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800881 }
Johannes Bergdd769862011-11-18 16:54:50 +0100882
883 if (calc_crc && id < 64 && (filter & (1ULL << id)))
884 crc = crc32_be(crc, pos - 2, elen + 2);
885
Paul Stewartfcff4f12012-02-23 17:59:53 -0800886 elem_parse_failed = false;
887
Johannes Bergdd769862011-11-18 16:54:50 +0100888 switch (id) {
Arik Nemtsov53837582014-11-09 18:50:18 +0200889 case WLAN_EID_LINK_ID:
890 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
891 elem_parse_failed = true;
892 break;
893 }
894 elems->lnk_id = (void *)(pos - 2);
895 break;
896 case WLAN_EID_CHAN_SWITCH_TIMING:
897 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
898 elem_parse_failed = true;
899 break;
900 }
901 elems->ch_sw_timing = (void *)pos;
902 break;
Arik Nemtsov9041c1f2014-11-09 18:50:15 +0200903 case WLAN_EID_EXT_CAPABILITY:
904 elems->ext_capab = pos;
905 elems->ext_capab_len = elen;
906 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100907 case WLAN_EID_SSID:
908 elems->ssid = pos;
909 elems->ssid_len = elen;
910 break;
911 case WLAN_EID_SUPP_RATES:
912 elems->supp_rates = pos;
913 elems->supp_rates_len = elen;
914 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100915 case WLAN_EID_DS_PARAMS:
Johannes Berg1cd8e882013-03-27 14:30:12 +0100916 if (elen >= 1)
917 elems->ds_params = pos;
918 else
919 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100920 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100921 case WLAN_EID_TIM:
922 if (elen >= sizeof(struct ieee80211_tim_ie)) {
923 elems->tim = (void *)pos;
924 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800925 } else
926 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100927 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100928 case WLAN_EID_CHALLENGE:
929 elems->challenge = pos;
930 elems->challenge_len = elen;
931 break;
932 case WLAN_EID_VENDOR_SPECIFIC:
933 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
934 pos[2] == 0xf2) {
935 /* Microsoft OUI (00:50:F2) */
936
937 if (calc_crc)
938 crc = crc32_be(crc, pos - 2, elen + 2);
939
Johannes Berg441a33b2013-02-12 16:27:04 +0100940 if (elen >= 5 && pos[3] == 2) {
Johannes Bergdd769862011-11-18 16:54:50 +0100941 /* OUI Type 2 - WMM IE */
942 if (pos[4] == 0) {
943 elems->wmm_info = pos;
944 elems->wmm_info_len = elen;
945 } else if (pos[4] == 1) {
946 elems->wmm_param = pos;
947 elems->wmm_param_len = elen;
948 }
949 }
950 }
951 break;
952 case WLAN_EID_RSN:
953 elems->rsn = pos;
954 elems->rsn_len = elen;
955 break;
956 case WLAN_EID_ERP_INFO:
Johannes Berg1946bed2013-03-27 14:31:53 +0100957 if (elen >= 1)
958 elems->erp_info = pos;
959 else
960 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100961 break;
962 case WLAN_EID_EXT_SUPP_RATES:
963 elems->ext_supp_rates = pos;
964 elems->ext_supp_rates_len = elen;
965 break;
966 case WLAN_EID_HT_CAPABILITY:
967 if (elen >= sizeof(struct ieee80211_ht_cap))
968 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800969 else
970 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100971 break;
Johannes Berg074d46d2012-03-15 19:45:16 +0100972 case WLAN_EID_HT_OPERATION:
973 if (elen >= sizeof(struct ieee80211_ht_operation))
974 elems->ht_operation = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800975 else
976 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100977 break;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000978 case WLAN_EID_VHT_CAPABILITY:
979 if (elen >= sizeof(struct ieee80211_vht_cap))
980 elems->vht_cap_elem = (void *)pos;
981 else
982 elem_parse_failed = true;
983 break;
984 case WLAN_EID_VHT_OPERATION:
985 if (elen >= sizeof(struct ieee80211_vht_operation))
986 elems->vht_operation = (void *)pos;
987 else
988 elem_parse_failed = true;
989 break;
Johannes Bergbee7f582013-02-07 22:24:55 +0100990 case WLAN_EID_OPMODE_NOTIF:
991 if (elen > 0)
992 elems->opmode_notif = pos;
993 else
994 elem_parse_failed = true;
995 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100996 case WLAN_EID_MESH_ID:
997 elems->mesh_id = pos;
998 elems->mesh_id_len = elen;
999 break;
1000 case WLAN_EID_MESH_CONFIG:
1001 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1002 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -08001003 else
1004 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +01001005 break;
1006 case WLAN_EID_PEER_MGMT:
1007 elems->peering = pos;
1008 elems->peering_len = elen;
1009 break;
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001010 case WLAN_EID_MESH_AWAKE_WINDOW:
1011 if (elen >= 2)
1012 elems->awake_window = (void *)pos;
1013 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001014 case WLAN_EID_PREQ:
1015 elems->preq = pos;
1016 elems->preq_len = elen;
1017 break;
1018 case WLAN_EID_PREP:
1019 elems->prep = pos;
1020 elems->prep_len = elen;
1021 break;
1022 case WLAN_EID_PERR:
1023 elems->perr = pos;
1024 elems->perr_len = elen;
1025 break;
1026 case WLAN_EID_RANN:
1027 if (elen >= sizeof(struct ieee80211_rann_ie))
1028 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -08001029 else
1030 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +01001031 break;
1032 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +02001033 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1034 elem_parse_failed = true;
1035 break;
1036 }
1037 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +01001038 break;
Johannes Bergb4f286a12013-03-26 14:13:58 +01001039 case WLAN_EID_EXT_CHANSWITCH_ANN:
1040 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1041 elem_parse_failed = true;
1042 break;
1043 }
1044 elems->ext_chansw_ie = (void *)pos;
1045 break;
Johannes Berg85220d72013-03-25 18:29:27 +01001046 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1048 elem_parse_failed = true;
1049 break;
1050 }
1051 elems->sec_chan_offs = (void *)pos;
1052 break;
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -07001053 case WLAN_EID_CHAN_SWITCH_PARAM:
1054 if (elen !=
1055 sizeof(*elems->mesh_chansw_params_ie)) {
1056 elem_parse_failed = true;
1057 break;
1058 }
1059 elems->mesh_chansw_params_ie = (void *)pos;
1060 break;
Johannes Bergb2e506b2013-03-26 14:54:16 +01001061 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1062 if (!action ||
1063 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1064 elem_parse_failed = true;
1065 break;
1066 }
1067 elems->wide_bw_chansw_ie = (void *)pos;
1068 break;
1069 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1070 if (action) {
1071 elem_parse_failed = true;
1072 break;
1073 }
1074 /*
1075 * This is a bit tricky, but as we only care about
1076 * the wide bandwidth channel switch element, so
1077 * just parse it out manually.
1078 */
1079 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1080 pos, elen);
1081 if (ie) {
1082 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1083 elems->wide_bw_chansw_ie =
1084 (void *)(ie + 2);
1085 else
1086 elem_parse_failed = true;
1087 }
1088 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001089 case WLAN_EID_COUNTRY:
1090 elems->country_elem = pos;
1091 elems->country_elem_len = elen;
1092 break;
1093 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +02001094 if (elen != 1) {
1095 elem_parse_failed = true;
1096 break;
1097 }
Johannes Bergdd769862011-11-18 16:54:50 +01001098 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +01001099 break;
Steinar H. Gundersonc8d65912014-09-03 06:48:37 -07001100 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1101 /* Lots of different options exist, but we only care
1102 * about the Dynamic Transmit Power Control element.
1103 * First check for the Cisco OUI, then for the DTPC
1104 * tag (0x00).
1105 */
1106 if (elen < 4) {
1107 elem_parse_failed = true;
1108 break;
1109 }
1110
1111 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1112 pos[2] != 0x96 || pos[3] != 0x00)
1113 break;
1114
1115 if (elen != 6) {
1116 elem_parse_failed = true;
1117 break;
1118 }
1119
1120 if (calc_crc)
1121 crc = crc32_be(crc, pos - 2, elen + 2);
1122
1123 elems->cisco_dtpc_elem = pos;
1124 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001125 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg79ba1d82013-03-27 14:38:07 +01001126 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1127 elems->timeout_int = (void *)pos;
1128 else
1129 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +01001130 break;
1131 default:
1132 break;
1133 }
1134
Paul Stewartfcff4f12012-02-23 17:59:53 -08001135 if (elem_parse_failed)
1136 elems->parse_error = true;
1137 else
Johannes Berg5df45692012-10-24 14:22:37 +02001138 __set_bit(id, seen_elems);
Paul Stewartfcff4f12012-02-23 17:59:53 -08001139
Johannes Bergdd769862011-11-18 16:54:50 +01001140 left -= elen;
1141 pos += elen;
1142 }
1143
Paul Stewartfcff4f12012-02-23 17:59:53 -08001144 if (left != 0)
1145 elems->parse_error = true;
1146
Johannes Bergdd769862011-11-18 16:54:50 +01001147 return crc;
1148}
1149
Johannes Berg3abead52012-03-02 15:56:59 +01001150void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1151 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +02001152{
1153 struct ieee80211_local *local = sdata->local;
1154 struct ieee80211_tx_queue_params qparam;
Johannes Berg55de9082012-07-26 17:24:39 +02001155 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg54bcbc62012-03-28 11:04:25 +02001156 int ac;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001157 bool use_11b, enable_qos;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001158 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
Johannes Bergaa837e12009-05-07 16:16:24 +02001159 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +02001160
1161 if (!local->ops->conf_tx)
1162 return;
1163
Johannes Berg54bcbc62012-03-28 11:04:25 +02001164 if (local->hw.queues < IEEE80211_NUM_ACS)
1165 return;
1166
Johannes Berg5825fe102008-09-09 12:56:01 +02001167 memset(&qparam, 0, sizeof(qparam));
1168
Johannes Berg55de9082012-07-26 17:24:39 +02001169 rcu_read_lock();
1170 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1171 use_11b = (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +01001172 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +02001173 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg55de9082012-07-26 17:24:39 +02001174 rcu_read_unlock();
Johannes Berg5825fe102008-09-09 12:56:01 +02001175
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001176 /*
1177 * By default disable QoS in STA mode for old access points, which do
1178 * not support 802.11e. New APs will provide proper queue parameters,
1179 * that we will configure later.
1180 */
1181 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1182
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001183 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1184
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001185 /* Set defaults according to 802.11-2007 Table 7-37 */
1186 aCWmax = 1023;
1187 if (use_11b)
1188 aCWmin = 31;
1189 else
1190 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +02001191
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001192 /* Confiure old 802.11b/g medium access rules. */
1193 qparam.cw_max = aCWmax;
1194 qparam.cw_min = aCWmin;
1195 qparam.txop = 0;
1196 qparam.aifs = 2;
1197
1198 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1199 /* Update if QoS is enabled. */
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001200 if (enable_qos) {
1201 switch (ac) {
1202 case IEEE80211_AC_BK:
1203 qparam.cw_max = aCWmax;
1204 qparam.cw_min = aCWmin;
1205 qparam.txop = 0;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001206 if (is_ocb)
1207 qparam.aifs = 9;
1208 else
1209 qparam.aifs = 7;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001210 break;
1211 /* never happens but let's not leave undefined */
1212 default:
1213 case IEEE80211_AC_BE:
1214 qparam.cw_max = aCWmax;
1215 qparam.cw_min = aCWmin;
1216 qparam.txop = 0;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001217 if (is_ocb)
1218 qparam.aifs = 6;
1219 else
1220 qparam.aifs = 3;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001221 break;
1222 case IEEE80211_AC_VI:
1223 qparam.cw_max = aCWmin;
1224 qparam.cw_min = (aCWmin + 1) / 2 - 1;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001225 if (is_ocb)
1226 qparam.txop = 0;
1227 else if (use_11b)
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001228 qparam.txop = 6016/32;
1229 else
1230 qparam.txop = 3008/32;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001231
1232 if (is_ocb)
1233 qparam.aifs = 3;
1234 else
1235 qparam.aifs = 2;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001236 break;
1237 case IEEE80211_AC_VO:
1238 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1239 qparam.cw_min = (aCWmin + 1) / 4 - 1;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001240 if (is_ocb)
1241 qparam.txop = 0;
1242 else if (use_11b)
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001243 qparam.txop = 3264/32;
1244 else
1245 qparam.txop = 1504/32;
1246 qparam.aifs = 2;
1247 break;
1248 }
Johannes Bergaa837e12009-05-07 16:16:24 +02001249 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001250
Kalle Valoab133152010-01-12 10:42:31 +02001251 qparam.uapsd = false;
1252
Johannes Berg54bcbc62012-03-28 11:04:25 +02001253 sdata->tx_conf[ac] = qparam;
1254 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +02001255 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001256
Johannes Bergf142c6b2012-06-18 20:07:15 +02001257 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1258 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001259 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +01001260 if (bss_notify)
1261 ieee80211_bss_info_change_notify(sdata,
1262 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +05301263 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001264}
Johannes Berge50db652008-09-09 15:07:09 +02001265
Johannes Berg46900292009-02-15 12:44:28 +01001266void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001267 u16 transaction, u16 auth_alg, u16 status,
Johannes Berg4a3cb702013-02-12 16:43:19 +01001268 const u8 *extra, size_t extra_len, const u8 *da,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001269 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1270 u32 tx_flags)
Johannes Berg46900292009-02-15 12:44:28 +01001271{
1272 struct ieee80211_local *local = sdata->local;
1273 struct sk_buff *skb;
1274 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +02001275 int err;
Johannes Berg46900292009-02-15 12:44:28 +01001276
Fred Zhou15e230a2013-09-24 10:33:01 +08001277 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
Max Stepanov744462a2014-06-10 20:00:08 +03001278 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1279 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
Joe Perchesd15b8452011-08-29 14:17:31 -07001280 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +01001281 return;
Joe Perchesd15b8452011-08-29 14:17:31 -07001282
Max Stepanov744462a2014-06-10 20:00:08 +03001283 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
Johannes Berg46900292009-02-15 12:44:28 +01001284
1285 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1286 memset(mgmt, 0, 24 + 6);
1287 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1288 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001289 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001290 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001291 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1292 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1293 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001294 mgmt->u.auth.status_code = cpu_to_le16(status);
Johannes Berg46900292009-02-15 12:44:28 +01001295 if (extra)
1296 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +01001297
Johannes Bergfffd0932009-07-08 14:22:54 +02001298 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1299 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1300 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1301 WARN_ON(err);
1302 }
1303
Johannes Berg1672c0e32013-01-29 15:02:27 +01001304 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1305 tx_flags;
Johannes Berg62ae67b2009-11-18 18:42:05 +01001306 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001307}
1308
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001309void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1310 const u8 *bssid, u16 stype, u16 reason,
1311 bool send_frame, u8 *frame_buf)
1312{
1313 struct ieee80211_local *local = sdata->local;
1314 struct sk_buff *skb;
1315 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1316
1317 /* build frame */
1318 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1319 mgmt->duration = 0; /* initialize only */
1320 mgmt->seq_ctrl = 0; /* initialize only */
1321 memcpy(mgmt->da, bssid, ETH_ALEN);
1322 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1323 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1324 /* u.deauth.reason_code == u.disassoc.reason_code */
1325 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1326
1327 if (send_frame) {
1328 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1329 IEEE80211_DEAUTH_FRAME_LEN);
1330 if (!skb)
1331 return;
1332
1333 skb_reserve(skb, local->hw.extra_tx_headroom);
1334
1335 /* copy in frame */
1336 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1337 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1338
1339 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1340 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1341 IEEE80211_SKB_CB(skb)->flags |=
1342 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1343
1344 ieee80211_tx_skb(sdata, skb);
1345 }
1346}
1347
David Spinadelc56ef672014-02-05 15:21:13 +02001348static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1349 u8 *buffer, size_t buffer_len,
1350 const u8 *ie, size_t ie_len,
1351 enum ieee80211_band band,
1352 u32 rate_mask,
1353 struct cfg80211_chan_def *chandef,
1354 size_t *offset)
Johannes Bergde95a542009-04-01 11:58:36 +02001355{
1356 struct ieee80211_supported_band *sband;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001357 u8 *pos = buffer, *end = buffer + buffer_len;
David Spinadelc56ef672014-02-05 15:21:13 +02001358 size_t noffset;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001359 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001360 u8 rates[32];
1361 int num_rates;
1362 int ext_rates_len;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001363 int shift;
1364 u32 rate_flags;
Johannes Berg40a11ca2014-11-24 15:49:44 +01001365 bool have_80mhz = false;
Johannes Bergde95a542009-04-01 11:58:36 +02001366
David Spinadelc56ef672014-02-05 15:21:13 +02001367 *offset = 0;
1368
Johannes Berg4d36ec582009-10-27 20:59:55 +01001369 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001370 if (WARN_ON_ONCE(!sband))
1371 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001372
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001373 rate_flags = ieee80211_chandef_rate_flags(chandef);
1374 shift = ieee80211_chandef_get_shift(chandef);
1375
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001376 num_rates = 0;
1377 for (i = 0; i < sband->n_bitrates; i++) {
1378 if ((BIT(i) & rate_mask) == 0)
1379 continue; /* skip rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001380 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1381 continue;
1382
1383 rates[num_rates++] =
1384 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1385 (1 << shift) * 5);
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001386 }
1387
1388 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001389
Johannes Bergc604b9f2012-11-29 12:45:18 +01001390 if (end - pos < 2 + supp_rates_len)
1391 goto out_err;
Johannes Bergde95a542009-04-01 11:58:36 +02001392 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001393 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001394 memcpy(pos, rates, supp_rates_len);
1395 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001396
Johannes Berg8e664fb2009-12-23 13:15:38 +01001397 /* insert "request information" if in custom IEs */
1398 if (ie && ie_len) {
1399 static const u8 before_extrates[] = {
1400 WLAN_EID_SSID,
1401 WLAN_EID_SUPP_RATES,
1402 WLAN_EID_REQUEST,
1403 };
1404 noffset = ieee80211_ie_split(ie, ie_len,
1405 before_extrates,
1406 ARRAY_SIZE(before_extrates),
David Spinadelc56ef672014-02-05 15:21:13 +02001407 *offset);
1408 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001409 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001410 memcpy(pos, ie + *offset, noffset - *offset);
1411 pos += noffset - *offset;
1412 *offset = noffset;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001413 }
Johannes Bergde95a542009-04-01 11:58:36 +02001414
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001415 ext_rates_len = num_rates - supp_rates_len;
1416 if (ext_rates_len > 0) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001417 if (end - pos < 2 + ext_rates_len)
1418 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001419 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001420 *pos++ = ext_rates_len;
1421 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1422 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001423 }
1424
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001425 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001426 if (end - pos < 3)
1427 goto out_err;
Jouni Malinen651b5222010-08-28 19:37:51 +03001428 *pos++ = WLAN_EID_DS_PARAMS;
1429 *pos++ = 1;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001430 *pos++ = ieee80211_frequency_to_channel(
1431 chandef->chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001432 }
1433
Johannes Berg8e664fb2009-12-23 13:15:38 +01001434 /* insert custom IEs that go before HT */
1435 if (ie && ie_len) {
1436 static const u8 before_ht[] = {
1437 WLAN_EID_SSID,
1438 WLAN_EID_SUPP_RATES,
1439 WLAN_EID_REQUEST,
1440 WLAN_EID_EXT_SUPP_RATES,
1441 WLAN_EID_DS_PARAMS,
1442 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1443 };
1444 noffset = ieee80211_ie_split(ie, ie_len,
1445 before_ht, ARRAY_SIZE(before_ht),
David Spinadelc56ef672014-02-05 15:21:13 +02001446 *offset);
1447 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001448 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001449 memcpy(pos, ie + *offset, noffset - *offset);
1450 pos += noffset - *offset;
1451 *offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001452 }
1453
Johannes Bergc604b9f2012-11-29 12:45:18 +01001454 if (sband->ht_cap.ht_supported) {
1455 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1456 goto out_err;
Ben Greearef96a8422011-11-18 11:32:00 -08001457 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1458 sband->ht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001459 }
Johannes Berg5ef2d412009-03-31 12:12:07 +02001460
Johannes Bergde95a542009-04-01 11:58:36 +02001461 /*
1462 * If adding more here, adjust code in main.c
1463 * that calculates local->scan_ies_len.
1464 */
1465
Johannes Berg4d952302014-02-04 09:48:34 +01001466 /* insert custom IEs that go before VHT */
Johannes Berg8e664fb2009-12-23 13:15:38 +01001467 if (ie && ie_len) {
Johannes Berg4d952302014-02-04 09:48:34 +01001468 static const u8 before_vht[] = {
1469 WLAN_EID_SSID,
1470 WLAN_EID_SUPP_RATES,
1471 WLAN_EID_REQUEST,
1472 WLAN_EID_EXT_SUPP_RATES,
1473 WLAN_EID_DS_PARAMS,
1474 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1475 WLAN_EID_HT_CAPABILITY,
1476 WLAN_EID_BSS_COEX_2040,
1477 WLAN_EID_EXT_CAPABILITY,
1478 WLAN_EID_SSID_LIST,
1479 WLAN_EID_CHANNEL_USAGE,
1480 WLAN_EID_INTERWORKING,
1481 /* mesh ID can't happen here */
1482 /* 60 GHz can't happen here right now */
1483 };
1484 noffset = ieee80211_ie_split(ie, ie_len,
1485 before_vht, ARRAY_SIZE(before_vht),
David Spinadelc56ef672014-02-05 15:21:13 +02001486 *offset);
1487 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001488 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001489 memcpy(pos, ie + *offset, noffset - *offset);
1490 pos += noffset - *offset;
1491 *offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001492 }
1493
Johannes Berg40a11ca2014-11-24 15:49:44 +01001494 /* Check if any channel in this sband supports at least 80 MHz */
1495 for (i = 0; i < sband->n_channels; i++) {
Arik Nemtsovfa44b982015-01-01 13:43:17 +02001496 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1497 IEEE80211_CHAN_NO_80MHZ))
1498 continue;
1499
1500 have_80mhz = true;
1501 break;
Johannes Berg40a11ca2014-11-24 15:49:44 +01001502 }
1503
1504 if (sband->vht_cap.vht_supported && have_80mhz) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001505 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1506 goto out_err;
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001507 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1508 sband->vht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001509 }
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001510
Johannes Bergde95a542009-04-01 11:58:36 +02001511 return pos - buffer;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001512 out_err:
1513 WARN_ONCE(1, "not enough space for preq IEs\n");
1514 return pos - buffer;
Johannes Bergde95a542009-04-01 11:58:36 +02001515}
1516
David Spinadelc56ef672014-02-05 15:21:13 +02001517int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1518 size_t buffer_len,
1519 struct ieee80211_scan_ies *ie_desc,
1520 const u8 *ie, size_t ie_len,
1521 u8 bands_used, u32 *rate_masks,
1522 struct cfg80211_chan_def *chandef)
1523{
1524 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1525 int i;
1526
1527 memset(ie_desc, 0, sizeof(*ie_desc));
1528
1529 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1530 if (bands_used & BIT(i)) {
1531 pos += ieee80211_build_preq_ies_band(local,
1532 buffer + pos,
1533 buffer_len - pos,
1534 ie, ie_len, i,
1535 rate_masks[i],
1536 chandef,
1537 &custom_ie_offset);
1538 ie_desc->ies[i] = buffer + old_pos;
1539 ie_desc->len[i] = pos - old_pos;
1540 old_pos = pos;
1541 }
1542 }
1543
1544 /* add any remaining custom IEs */
1545 if (ie && ie_len) {
1546 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1547 "not enough space for preq custom IEs\n"))
1548 return pos;
1549 memcpy(buffer + pos, ie + custom_ie_offset,
1550 ie_len - custom_ie_offset);
1551 ie_desc->common_ies = buffer + pos;
1552 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1553 pos += ie_len - custom_ie_offset;
1554 }
1555
1556 return pos;
1557};
1558
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001559struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berga344d672014-06-12 22:24:31 +02001560 const u8 *src, const u8 *dst,
1561 u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001562 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001563 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001564 const u8 *ie, size_t ie_len,
1565 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001566{
1567 struct ieee80211_local *local = sdata->local;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001568 struct cfg80211_chan_def chandef;
Johannes Berg46900292009-02-15 12:44:28 +01001569 struct sk_buff *skb;
1570 struct ieee80211_mgmt *mgmt;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001571 int ies_len;
David Spinadelc56ef672014-02-05 15:21:13 +02001572 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1573 struct ieee80211_scan_ies dummy_ie_desc;
Johannes Berg46900292009-02-15 12:44:28 +01001574
Paul Stewarta806c552011-06-23 09:00:11 -08001575 /*
1576 * Do not send DS Channel parameter for directed probe requests
1577 * in order to maximize the chance that we get a response. Some
1578 * badly-behaved APs don't respond when this parameter is included.
1579 */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001580 chandef.width = sdata->vif.bss_conf.chandef.width;
Paul Stewarta806c552011-06-23 09:00:11 -08001581 if (directed)
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001582 chandef.chan = NULL;
Paul Stewarta806c552011-06-23 09:00:11 -08001583 else
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001584 chandef.chan = chan;
Jouni Malinen651b5222010-08-28 19:37:51 +03001585
Johannes Berga344d672014-06-12 22:24:31 +02001586 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1587 100 + ie_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001588 if (!skb)
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001589 return NULL;
1590
David Spinadelc56ef672014-02-05 15:21:13 +02001591 rate_masks[chan->band] = ratemask;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001592 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
David Spinadelc56ef672014-02-05 15:21:13 +02001593 skb_tailroom(skb), &dummy_ie_desc,
1594 ie, ie_len, BIT(chan->band),
1595 rate_masks, &chandef);
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001596 skb_put(skb, ies_len);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001597
Johannes Berg46900292009-02-15 12:44:28 +01001598 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001599 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001600 memcpy(mgmt->da, dst, ETH_ALEN);
1601 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001602 }
Johannes Berg46900292009-02-15 12:44:28 +01001603
Johannes Berg62ae67b2009-11-18 18:42:05 +01001604 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001605
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001606 return skb;
1607}
1608
Johannes Berga344d672014-06-12 22:24:31 +02001609void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1610 const u8 *src, const u8 *dst,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001611 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001612 const u8 *ie, size_t ie_len,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001613 u32 ratemask, bool directed, u32 tx_flags,
Johannes Berg55de9082012-07-26 17:24:39 +02001614 struct ieee80211_channel *channel, bool scan)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001615{
1616 struct sk_buff *skb;
1617
Johannes Berga344d672014-06-12 22:24:31 +02001618 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001619 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001620 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301621 if (skb) {
Johannes Berg1672c0e32013-01-29 15:02:27 +01001622 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
Johannes Berg55de9082012-07-26 17:24:39 +02001623 if (scan)
1624 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1625 else
1626 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301627 }
Johannes Berg46900292009-02-15 12:44:28 +01001628}
1629
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001630u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
Johannes Berg46900292009-02-15 12:44:28 +01001631 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001632 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001633{
1634 struct ieee80211_supported_band *sband;
Johannes Berg46900292009-02-15 12:44:28 +01001635 size_t num_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001636 u32 supp_rates, rate_flags;
1637 int i, j, shift;
1638 sband = sdata->local->hw.wiphy->bands[band];
1639
1640 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1641 shift = ieee80211_vif_get_shift(&sdata->vif);
Johannes Berg46900292009-02-15 12:44:28 +01001642
Michal Kazior4ee73f32012-04-11 08:47:56 +02001643 if (WARN_ON(!sband))
1644 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001645
Johannes Berg46900292009-02-15 12:44:28 +01001646 num_rates = sband->n_bitrates;
1647 supp_rates = 0;
1648 for (i = 0; i < elems->supp_rates_len +
1649 elems->ext_supp_rates_len; i++) {
1650 u8 rate = 0;
1651 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001652 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001653 if (i < elems->supp_rates_len)
1654 rate = elems->supp_rates[i];
1655 else if (elems->ext_supp_rates)
1656 rate = elems->ext_supp_rates
1657 [i - elems->supp_rates_len];
1658 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001659 is_basic = !!(rate & 0x80);
1660
1661 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1662 continue;
1663
1664 for (j = 0; j < num_rates; j++) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001665 int brate;
1666 if ((rate_flags & sband->bitrates[j].flags)
1667 != rate_flags)
1668 continue;
1669
1670 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1671 1 << shift);
1672
1673 if (brate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001674 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001675 if (basic_rates && is_basic)
1676 *basic_rates |= BIT(j);
1677 }
1678 }
Johannes Berg46900292009-02-15 12:44:28 +01001679 }
1680 return supp_rates;
1681}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001682
Johannes Berg84f6a012009-08-20 20:02:20 +02001683void ieee80211_stop_device(struct ieee80211_local *local)
1684{
1685 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001686 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001687
1688 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001689
1690 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001691 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001692}
1693
Johannes Bergf6837ba2014-04-30 14:19:04 +02001694static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1695{
1696 struct ieee80211_sub_if_data *sdata;
1697 struct ieee80211_chanctx *ctx;
1698
1699 /*
1700 * We get here if during resume the device can't be restarted properly.
1701 * We might also get here if this happens during HW reset, which is a
1702 * slightly different situation and we need to drop all connections in
1703 * the latter case.
1704 *
1705 * Ask cfg80211 to turn off all interfaces, this will result in more
1706 * warnings but at least we'll then get into a clean stopped state.
1707 */
1708
1709 local->resuming = false;
1710 local->suspended = false;
1711 local->started = false;
1712
1713 /* scheduled scan clearly can't be running any more, but tell
1714 * cfg80211 and clear local state
1715 */
1716 ieee80211_sched_scan_end(local);
1717
1718 list_for_each_entry(sdata, &local->interfaces, list)
1719 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1720
1721 /* Mark channel contexts as not being in the driver any more to avoid
1722 * removing them from the driver during the shutdown process...
1723 */
1724 mutex_lock(&local->chanctx_mtx);
1725 list_for_each_entry(ctx, &local->chanctx_list, list)
1726 ctx->driver_present = false;
1727 mutex_unlock(&local->chanctx_mtx);
1728
1729 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1730}
1731
Stanislaw Gruszka153a5fc2013-02-28 10:55:30 +01001732static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1733 struct ieee80211_sub_if_data *sdata)
1734{
1735 struct ieee80211_chanctx_conf *conf;
1736 struct ieee80211_chanctx *ctx;
1737
1738 if (!local->use_chanctx)
1739 return;
1740
1741 mutex_lock(&local->chanctx_mtx);
1742 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1743 lockdep_is_held(&local->chanctx_mtx));
1744 if (conf) {
1745 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1746 drv_assign_vif_chanctx(local, sdata, ctx);
1747 }
1748 mutex_unlock(&local->chanctx_mtx);
1749}
1750
Johannes Bergf2753dd2009-04-14 10:09:24 +02001751int ieee80211_reconfig(struct ieee80211_local *local)
1752{
1753 struct ieee80211_hw *hw = &local->hw;
1754 struct ieee80211_sub_if_data *sdata;
Johannes Berg55de9082012-07-26 17:24:39 +02001755 struct ieee80211_chanctx *ctx;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001756 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001757 int res, i;
Johannes Bergd8881302013-01-10 23:55:33 +01001758 bool reconfig_due_to_wowlan = false;
David Spinadeld43c6b62013-12-08 21:48:57 +02001759 struct ieee80211_sub_if_data *sched_scan_sdata;
Johannes Berg6ea0a692014-11-19 11:55:49 +01001760 struct cfg80211_sched_scan_request *sched_scan_req;
David Spinadeld43c6b62013-12-08 21:48:57 +02001761 bool sched_scan_stopped = false;
Johannes Bergd8881302013-01-10 23:55:33 +01001762
Eliad Peller0f8b8242014-12-14 11:05:53 +02001763 /* nothing to do if HW shouldn't run */
1764 if (!local->open_count)
1765 goto wake_up;
1766
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001767#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001768 if (local->suspended)
1769 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001770
Johannes Bergeecc4802011-05-04 15:37:29 +02001771 if (local->wowlan) {
Johannes Bergeecc4802011-05-04 15:37:29 +02001772 res = drv_resume(local);
Johannes Berg27b3eb92013-08-07 20:11:55 +02001773 local->wowlan = false;
Johannes Bergeecc4802011-05-04 15:37:29 +02001774 if (res < 0) {
1775 local->resuming = false;
1776 return res;
1777 }
1778 if (res == 0)
1779 goto wake_up;
1780 WARN_ON(res > 1);
1781 /*
1782 * res is 1, which means the driver requested
1783 * to go through a regular reset on wakeup.
1784 */
Johannes Bergd8881302013-01-10 23:55:33 +01001785 reconfig_due_to_wowlan = true;
Johannes Bergeecc4802011-05-04 15:37:29 +02001786 }
1787#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001788
1789 /*
1790 * Upon resume hardware can sometimes be goofy due to
1791 * various platform / driver / bus issues, so restarting
1792 * the device may at times not work immediately. Propagate
1793 * the error.
1794 */
1795 res = drv_start(local);
1796 if (res) {
Johannes Bergf6837ba2014-04-30 14:19:04 +02001797 if (local->suspended)
1798 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1799 else
1800 WARN(1, "Hardware became unavailable during restart.\n");
1801 ieee80211_handle_reconfig_failure(local);
Johannes Berg94f9b972011-07-14 16:48:54 +02001802 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001803 }
1804
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301805 /* setup fragmentation threshold */
1806 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1807
1808 /* setup RTS threshold */
1809 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1810
1811 /* reset coverage class */
1812 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1813
Johannes Berg94f9b972011-07-14 16:48:54 +02001814 ieee80211_led_radio(local, true);
1815 ieee80211_mod_tpt_led_trig(local,
1816 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1817
Johannes Bergf2753dd2009-04-14 10:09:24 +02001818 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001819 sdata = rtnl_dereference(local->monitor_sdata);
1820 if (sdata) {
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001821 /* in HW restart it exists already */
1822 WARN_ON(local->resuming);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001823 res = drv_add_interface(local, sdata);
1824 if (WARN_ON(res)) {
Monam Agarwal0c2bef462014-03-24 00:51:43 +05301825 RCU_INIT_POINTER(local->monitor_sdata, NULL);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001826 synchronize_net();
1827 kfree(sdata);
1828 }
1829 }
1830
Johannes Bergf2753dd2009-04-14 10:09:24 +02001831 list_for_each_entry(sdata, &local->interfaces, list) {
1832 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1833 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Luciano Coelhoc8fff3d2015-03-01 09:10:04 +02001834 ieee80211_sdata_running(sdata)) {
Johannes Berg7b7eab62011-11-03 14:41:13 +01001835 res = drv_add_interface(local, sdata);
Luciano Coelhoc8fff3d2015-03-01 09:10:04 +02001836 if (WARN_ON(res))
1837 break;
1838 }
1839 }
1840
1841 /* If adding any of the interfaces failed above, roll back and
1842 * report failure.
1843 */
1844 if (res) {
1845 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1846 list)
1847 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1848 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1849 ieee80211_sdata_running(sdata))
1850 drv_remove_interface(local, sdata);
1851 ieee80211_handle_reconfig_failure(local);
1852 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001853 }
1854
Johannes Berg55de9082012-07-26 17:24:39 +02001855 /* add channel contexts */
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001856 if (local->use_chanctx) {
1857 mutex_lock(&local->chanctx_mtx);
1858 list_for_each_entry(ctx, &local->chanctx_list, list)
Michal Kazior5bcae312014-06-25 12:35:06 +02001859 if (ctx->replace_state !=
1860 IEEE80211_CHANCTX_REPLACES_OTHER)
1861 WARN_ON(drv_add_chanctx(local, ctx));
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001862 mutex_unlock(&local->chanctx_mtx);
Johannes Berg55de9082012-07-26 17:24:39 +02001863
Zhao, Gang7df180f2014-04-26 09:43:40 +08001864 list_for_each_entry(sdata, &local->interfaces, list) {
1865 if (!ieee80211_sdata_running(sdata))
1866 continue;
1867 ieee80211_assign_chanctx(local, sdata);
1868 }
Johannes Berg6352c872012-11-07 12:40:41 +01001869
Zhao, Gang7df180f2014-04-26 09:43:40 +08001870 sdata = rtnl_dereference(local->monitor_sdata);
1871 if (sdata && ieee80211_sdata_running(sdata))
1872 ieee80211_assign_chanctx(local, sdata);
1873 }
Johannes Bergfe5f2552012-11-19 22:19:08 +01001874
Johannes Bergf2753dd2009-04-14 10:09:24 +02001875 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001876 mutex_lock(&local->sta_mtx);
1877 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001878 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001879
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001880 if (!sta->uploaded)
1881 continue;
1882
1883 /* AP-mode stations will be added later */
1884 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1885 continue;
1886
1887 for (state = IEEE80211_STA_NOTEXIST;
1888 state < sta->sta_state; state++)
1889 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1890 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001891 }
Johannes Berg34e89502010-02-03 13:59:58 +01001892 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001893
Eliad Peller2683d652011-07-14 20:29:42 +03001894 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001895 if (hw->queues >= IEEE80211_NUM_ACS) {
1896 list_for_each_entry(sdata, &local->interfaces, list) {
1897 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1898 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1899 !ieee80211_sdata_running(sdata))
1900 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001901
Johannes Berg54bcbc62012-03-28 11:04:25 +02001902 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1903 drv_conf_tx(local, sdata, i,
1904 &sdata->tx_conf[i]);
1905 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001906 }
Eliad Peller2683d652011-07-14 20:29:42 +03001907
Johannes Bergf2753dd2009-04-14 10:09:24 +02001908 /* reconfigure hardware */
1909 ieee80211_hw_config(local, ~0);
1910
Johannes Bergf2753dd2009-04-14 10:09:24 +02001911 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001912
1913 /* Finally also reconfigure all the BSS information */
1914 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001915 u32 changed;
1916
Johannes Berg9607e6b2009-12-23 13:15:31 +01001917 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001918 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001919
1920 /* common change flags for all interface types */
1921 changed = BSS_CHANGED_ERP_CTS_PROT |
1922 BSS_CHANGED_ERP_PREAMBLE |
1923 BSS_CHANGED_ERP_SLOT |
1924 BSS_CHANGED_HT |
1925 BSS_CHANGED_BASIC_RATES |
1926 BSS_CHANGED_BEACON_INT |
1927 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001928 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001929 BSS_CHANGED_QOS |
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001930 BSS_CHANGED_IDLE |
1931 BSS_CHANGED_TXPOWER;
Johannes Bergac8dd502010-05-05 09:44:02 +02001932
Johannes Bergf2753dd2009-04-14 10:09:24 +02001933 switch (sdata->vif.type) {
1934 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001935 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001936 BSS_CHANGED_ARP_FILTER |
1937 BSS_CHANGED_PS;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001938
Alexander Bondar989c6502013-05-16 17:34:17 +03001939 /* Re-send beacon info report to the driver */
1940 if (sdata->u.mgd.have_beacon)
1941 changed |= BSS_CHANGED_BEACON_INFO;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001942
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001943 sdata_lock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001944 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001945 sdata_unlock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001946 break;
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001947 case NL80211_IFTYPE_OCB:
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001948 changed |= BSS_CHANGED_OCB;
1949 ieee80211_bss_info_change_notify(sdata, changed);
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001950 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001951 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001952 changed |= BSS_CHANGED_IBSS;
1953 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001954 case NL80211_IFTYPE_AP:
Johannes Berg339afbf2012-11-14 15:21:17 +01001955 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001956
Johannes Berg10416382012-10-19 15:44:42 +02001957 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001958 changed |= BSS_CHANGED_AP_PROBE_RESP;
1959
Johannes Berg10416382012-10-19 15:44:42 +02001960 if (rcu_access_pointer(sdata->u.ap.beacon))
1961 drv_start_ap(local, sdata);
1962 }
1963
Arik Nemtsov78274932011-09-04 11:11:32 +03001964 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001965 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg8da34932012-12-14 14:17:26 +01001966 if (sdata->vif.bss_conf.enable_beacon) {
1967 changed |= BSS_CHANGED_BEACON |
1968 BSS_CHANGED_BEACON_ENABLED;
1969 ieee80211_bss_info_change_notify(sdata, changed);
1970 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001971 break;
1972 case NL80211_IFTYPE_WDS:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001973 case NL80211_IFTYPE_AP_VLAN:
1974 case NL80211_IFTYPE_MONITOR:
Johannes Berg98104fde2012-06-16 00:19:54 +02001975 case NL80211_IFTYPE_P2P_DEVICE:
Zhao, Gangb2057862014-04-26 09:43:41 +08001976 /* nothing to do */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001977 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001978 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001979 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001980 case NL80211_IFTYPE_P2P_CLIENT:
1981 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001982 WARN_ON(1);
1983 break;
1984 }
1985 }
1986
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001987 ieee80211_recalc_ps(local, -1);
1988
Johannes Berg2a419052010-06-10 10:21:29 +02001989 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001990 * The sta might be in psm against the ap (e.g. because
1991 * this was the state before a hw restart), so we
1992 * explicitly send a null packet in order to make sure
1993 * it'll sync against the ap (and get out of psm).
1994 */
1995 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1996 list_for_each_entry(sdata, &local->interfaces, list) {
1997 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1998 continue;
Johannes Berg20f544e2012-11-08 14:06:28 +01001999 if (!sdata->u.mgd.associated)
2000 continue;
Eliad Peller6e1b1b22012-01-26 13:36:05 +02002001
2002 ieee80211_send_nullfunc(local, sdata, 0);
2003 }
2004 }
2005
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03002006 /* APs are now beaconing, add back stations */
2007 mutex_lock(&local->sta_mtx);
2008 list_for_each_entry(sta, &local->sta_list, list) {
2009 enum ieee80211_sta_state state;
2010
2011 if (!sta->uploaded)
2012 continue;
2013
2014 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2015 continue;
2016
2017 for (state = IEEE80211_STA_NOTEXIST;
2018 state < sta->sta_state; state++)
2019 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2020 state + 1));
2021 }
2022 mutex_unlock(&local->sta_mtx);
2023
Eyal Shapira7b21aea2012-05-29 02:00:22 -07002024 /* add back keys */
2025 list_for_each_entry(sdata, &local->interfaces, list)
Michal Kaziorf9dca802015-05-13 09:16:48 +00002026 ieee80211_reset_crypto_tx_tailroom(sdata);
2027
2028 list_for_each_entry(sdata, &local->interfaces, list)
Eyal Shapira7b21aea2012-05-29 02:00:22 -07002029 if (ieee80211_sdata_running(sdata))
2030 ieee80211_enable_keys(sdata);
2031
Eliad Pellerc6209482012-07-02 15:08:25 +03002032 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03002033 local->in_reconfig = false;
2034 barrier();
2035
Johannes Berg3c3e21e2013-03-27 23:20:27 +01002036 if (local->monitors == local->open_count && local->monitors > 0)
2037 ieee80211_add_virtual_monitor(local);
2038
Eliad Peller6e1b1b22012-01-26 13:36:05 +02002039 /*
Johannes Berg2a419052010-06-10 10:21:29 +02002040 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2041 * sessions can be established after a resume.
2042 *
2043 * Also tear down aggregation sessions since reconfiguring
2044 * them in a hardware restart scenario is not easily done
2045 * right now, and the hardware will have lost information
2046 * about the sessions, but we and the AP still think they
2047 * are active. This is really a workaround though.
2048 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08002049 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02002050 mutex_lock(&local->sta_mtx);
2051
2052 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergc82c4a82012-07-18 13:31:31 +02002053 ieee80211_sta_tear_down_BA_sessions(
2054 sta, AGG_STOP_LOCAL_REQUEST);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002055 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08002056 }
Johannes Berg2a419052010-06-10 10:21:29 +02002057
2058 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08002059 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08002060
Johannes Berg445ea4e2013-02-13 12:25:28 +01002061 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +03002062 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2063 false);
Johannes Bergf2753dd2009-04-14 10:09:24 +02002064
Johannes Berg5bb644a2009-05-17 11:40:42 +02002065 /*
Arik Nemtsov32769812014-02-11 12:27:19 +02002066 * Reconfigure sched scan if it was interrupted by FW restart or
2067 * suspend.
2068 */
2069 mutex_lock(&local->mtx);
2070 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2071 lockdep_is_held(&local->mtx));
Johannes Berg6ea0a692014-11-19 11:55:49 +01002072 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2073 lockdep_is_held(&local->mtx));
2074 if (sched_scan_sdata && sched_scan_req)
Arik Nemtsov32769812014-02-11 12:27:19 +02002075 /*
2076 * Sched scan stopped, but we don't want to report it. Instead,
2077 * we're trying to reschedule.
2078 */
2079 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
Johannes Berg6ea0a692014-11-19 11:55:49 +01002080 sched_scan_req))
Arik Nemtsov32769812014-02-11 12:27:19 +02002081 sched_scan_stopped = true;
2082 mutex_unlock(&local->mtx);
2083
2084 if (sched_scan_stopped)
Eliad Pellere669ba22014-04-30 16:14:24 +03002085 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
Arik Nemtsov32769812014-02-11 12:27:19 +02002086
2087 /*
Johannes Berg5bb644a2009-05-17 11:40:42 +02002088 * If this is for hw restart things are still running.
2089 * We may want to change that later, however.
2090 */
Eliad Peller0f8b8242014-12-14 11:05:53 +02002091 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
Eliad Pellercf2c92d2014-11-04 11:43:54 +02002092 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
Johannes Berg8f21b0a2013-01-11 00:28:01 +01002093
2094 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02002095 return 0;
2096
2097#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01002098 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02002099 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01002100 mb();
2101 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02002102
Luciano Coelho9120d942015-01-24 10:30:02 +02002103 /* It's possible that we don't handle the scan completion in
2104 * time during suspend, so if it's still marked as completed
2105 * here, queue the work and flush it to clean things up.
2106 * Instead of calling the worker function directly here, we
2107 * really queue it to avoid potential races with other flows
2108 * scheduling the same work.
2109 */
2110 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2111 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2112 flush_delayed_work(&local->scan_work);
2113 }
2114
Eliad Peller0f8b8242014-12-14 11:05:53 +02002115 if (local->open_count && !reconfig_due_to_wowlan)
Eliad Pellercf2c92d2014-11-04 11:43:54 +02002116 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2117
Johannes Bergb8360ab2013-04-29 14:57:44 +02002118 list_for_each_entry(sdata, &local->interfaces, list) {
2119 if (!ieee80211_sdata_running(sdata))
2120 continue;
2121 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2122 ieee80211_sta_restart(sdata);
2123 }
2124
Johannes Berg26d59532011-04-01 13:52:48 +02002125 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02002126#else
2127 WARN_ON(1);
2128#endif
David Spinadeld43c6b62013-12-08 21:48:57 +02002129
Johannes Bergf2753dd2009-04-14 10:09:24 +02002130 return 0;
2131}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002132
Johannes Berg95acac62011-07-12 12:30:59 +02002133void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2134{
2135 struct ieee80211_sub_if_data *sdata;
2136 struct ieee80211_local *local;
2137 struct ieee80211_key *key;
2138
2139 if (WARN_ON(!vif))
2140 return;
2141
2142 sdata = vif_to_sdata(vif);
2143 local = sdata->local;
2144
2145 if (WARN_ON(!local->resuming))
2146 return;
2147
2148 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2149 return;
2150
2151 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2152
2153 mutex_lock(&local->key_mtx);
2154 list_for_each_entry(key, &sdata->key_list, list)
2155 key->flags |= KEY_FLAG_TAINTED;
2156 mutex_unlock(&local->key_mtx);
2157}
2158EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2159
Johannes Berg04ecd252012-09-11 14:34:12 +02002160void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
Johannes Berg0f782312009-12-01 13:37:02 +01002161{
Johannes Berg04ecd252012-09-11 14:34:12 +02002162 struct ieee80211_local *local = sdata->local;
2163 struct ieee80211_chanctx_conf *chanctx_conf;
2164 struct ieee80211_chanctx *chanctx;
Johannes Berg0f782312009-12-01 13:37:02 +01002165
Johannes Berg04ecd252012-09-11 14:34:12 +02002166 mutex_lock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01002167
Johannes Berg04ecd252012-09-11 14:34:12 +02002168 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2169 lockdep_is_held(&local->chanctx_mtx));
Johannes Berg0f782312009-12-01 13:37:02 +01002170
Johannes Berg04ecd252012-09-11 14:34:12 +02002171 if (WARN_ON_ONCE(!chanctx_conf))
Johannes Berg5d8e4232012-09-11 10:17:11 +02002172 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01002173
Johannes Berg04ecd252012-09-11 14:34:12 +02002174 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2175 ieee80211_recalc_smps_chanctx(local, chanctx);
Johannes Berg5d8e4232012-09-11 10:17:11 +02002176 unlock:
Johannes Berg04ecd252012-09-11 14:34:12 +02002177 mutex_unlock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01002178}
Johannes Berg8e664fb2009-12-23 13:15:38 +01002179
Eliad Peller21f659b2013-11-11 20:14:01 +02002180void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2181{
2182 struct ieee80211_local *local = sdata->local;
2183 struct ieee80211_chanctx_conf *chanctx_conf;
2184 struct ieee80211_chanctx *chanctx;
2185
2186 mutex_lock(&local->chanctx_mtx);
2187
2188 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2189 lockdep_is_held(&local->chanctx_mtx));
2190
2191 if (WARN_ON_ONCE(!chanctx_conf))
2192 goto unlock;
2193
2194 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2195 ieee80211_recalc_chanctx_min_def(local, chanctx);
2196 unlock:
2197 mutex_unlock(&local->chanctx_mtx);
2198}
2199
Johannes Berg8e664fb2009-12-23 13:15:38 +01002200size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2201{
2202 size_t pos = offset;
2203
2204 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2205 pos += 2 + ies[pos + 1];
2206
2207 return pos;
2208}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07002209
2210static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2211 int rssi_min_thold,
2212 int rssi_max_thold)
2213{
2214 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2215
2216 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2217 return;
2218
2219 /*
2220 * Scale up threshold values before storing it, as the RSSI averaging
2221 * algorithm uses a scaled up value as well. Change this scaling
2222 * factor if the RSSI averaging algorithm changes.
2223 */
2224 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2225 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2226}
2227
2228void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2229 int rssi_min_thold,
2230 int rssi_max_thold)
2231{
2232 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2233
2234 WARN_ON(rssi_min_thold == rssi_max_thold ||
2235 rssi_min_thold > rssi_max_thold);
2236
2237 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2238 rssi_max_thold);
2239}
2240EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2241
2242void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2243{
2244 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2245
2246 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2247}
2248EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03002249
Ben Greearef96a8422011-11-18 11:32:00 -08002250u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07002251 u16 cap)
2252{
2253 __le16 tmp;
2254
2255 *pos++ = WLAN_EID_HT_CAPABILITY;
2256 *pos++ = sizeof(struct ieee80211_ht_cap);
2257 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2258
2259 /* capability flags */
2260 tmp = cpu_to_le16(cap);
2261 memcpy(pos, &tmp, sizeof(u16));
2262 pos += sizeof(u16);
2263
2264 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08002265 *pos++ = ht_cap->ampdu_factor |
2266 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07002267 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2268
2269 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08002270 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2271 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002272
2273 /* extended capabilities */
2274 pos += sizeof(__le16);
2275
2276 /* BF capabilities */
2277 pos += sizeof(__le32);
2278
2279 /* antenna selection */
2280 pos += sizeof(u8);
2281
2282 return pos;
2283}
2284
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00002285u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
Johannes Bergcc3983d2012-12-07 12:45:06 +01002286 u32 cap)
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00002287{
2288 __le32 tmp;
2289
2290 *pos++ = WLAN_EID_VHT_CAPABILITY;
Mahesh Palivelad4950282012-10-10 11:25:40 +00002291 *pos++ = sizeof(struct ieee80211_vht_cap);
2292 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00002293
2294 /* capability flags */
2295 tmp = cpu_to_le32(cap);
2296 memcpy(pos, &tmp, sizeof(u32));
2297 pos += sizeof(u32);
2298
2299 /* VHT MCS set */
2300 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2301 pos += sizeof(vht_cap->vht_mcs);
2302
2303 return pos;
2304}
2305
Johannes Berg074d46d2012-03-15 19:45:16 +01002306u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Johannes Berg4bf88532012-11-09 11:39:59 +01002307 const struct cfg80211_chan_def *chandef,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002308 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002309{
Johannes Berg074d46d2012-03-15 19:45:16 +01002310 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002311 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01002312 *pos++ = WLAN_EID_HT_OPERATION;
2313 *pos++ = sizeof(struct ieee80211_ht_operation);
2314 ht_oper = (struct ieee80211_ht_operation *)pos;
Johannes Berg4bf88532012-11-09 11:39:59 +01002315 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2316 chandef->chan->center_freq);
2317 switch (chandef->width) {
2318 case NL80211_CHAN_WIDTH_160:
2319 case NL80211_CHAN_WIDTH_80P80:
2320 case NL80211_CHAN_WIDTH_80:
2321 case NL80211_CHAN_WIDTH_40:
2322 if (chandef->center_freq1 > chandef->chan->center_freq)
2323 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2324 else
2325 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002326 break;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002327 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01002328 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002329 break;
2330 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07002331 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
Johannes Berg4bf88532012-11-09 11:39:59 +01002332 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2333 chandef->width != NL80211_CHAN_WIDTH_20)
Johannes Berg074d46d2012-03-15 19:45:16 +01002334 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01002335
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002336 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01002337 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002338
2339 /* It seems that Basic MCS set and Supported MCS set
2340 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01002341 memset(&ht_oper->basic_set, 0, 16);
2342 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002343
Johannes Berg074d46d2012-03-15 19:45:16 +01002344 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002345}
2346
Arik Nemtsovfb28ec02015-03-01 09:10:02 +02002347u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2348 const struct cfg80211_chan_def *chandef)
2349{
2350 struct ieee80211_vht_operation *vht_oper;
2351
2352 *pos++ = WLAN_EID_VHT_OPERATION;
2353 *pos++ = sizeof(struct ieee80211_vht_operation);
2354 vht_oper = (struct ieee80211_vht_operation *)pos;
2355 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2356 chandef->center_freq1);
2357 if (chandef->center_freq2)
2358 vht_oper->center_freq_seg2_idx =
2359 ieee80211_frequency_to_channel(chandef->center_freq2);
2360
2361 switch (chandef->width) {
2362 case NL80211_CHAN_WIDTH_160:
2363 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2364 break;
2365 case NL80211_CHAN_WIDTH_80P80:
2366 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2367 break;
2368 case NL80211_CHAN_WIDTH_80:
2369 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2370 break;
2371 default:
2372 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2373 break;
2374 }
2375
2376 /* don't require special VHT peer rates */
2377 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2378
2379 return pos + sizeof(struct ieee80211_vht_operation);
2380}
2381
Johannes Berg4bf88532012-11-09 11:39:59 +01002382void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
Johannes Berg4a3cb702013-02-12 16:43:19 +01002383 const struct ieee80211_ht_operation *ht_oper,
Johannes Berg4bf88532012-11-09 11:39:59 +01002384 struct cfg80211_chan_def *chandef)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002385{
2386 enum nl80211_channel_type channel_type;
2387
Johannes Berg4bf88532012-11-09 11:39:59 +01002388 if (!ht_oper) {
2389 cfg80211_chandef_create(chandef, control_chan,
2390 NL80211_CHAN_NO_HT);
2391 return;
2392 }
Alexander Simon42e7aa72011-10-26 14:47:26 -07002393
Johannes Berg074d46d2012-03-15 19:45:16 +01002394 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07002395 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2396 channel_type = NL80211_CHAN_HT20;
2397 break;
2398 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2399 channel_type = NL80211_CHAN_HT40PLUS;
2400 break;
2401 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2402 channel_type = NL80211_CHAN_HT40MINUS;
2403 break;
2404 default:
2405 channel_type = NL80211_CHAN_NO_HT;
2406 }
2407
Johannes Berg4bf88532012-11-09 11:39:59 +01002408 cfg80211_chandef_create(chandef, control_chan, channel_type);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002409}
2410
Janusz.Dziedzic@tieto.comabcff6e2015-03-20 06:37:01 +01002411void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2412 const struct ieee80211_vht_operation *oper,
2413 struct cfg80211_chan_def *chandef)
2414{
2415 if (!oper)
2416 return;
2417
2418 chandef->chan = control_chan;
2419
2420 switch (oper->chan_width) {
2421 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2422 break;
2423 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2424 chandef->width = NL80211_CHAN_WIDTH_80;
2425 break;
2426 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2427 chandef->width = NL80211_CHAN_WIDTH_160;
2428 break;
2429 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2430 chandef->width = NL80211_CHAN_WIDTH_80P80;
2431 break;
2432 default:
2433 break;
2434 }
2435
2436 chandef->center_freq1 =
2437 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2438 control_chan->band);
2439 chandef->center_freq2 =
2440 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2441 control_chan->band);
2442}
2443
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002444int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2445 const struct ieee80211_supported_band *sband,
2446 const u8 *srates, int srates_len, u32 *rates)
2447{
2448 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2449 int shift = ieee80211_chandef_get_shift(chandef);
2450 struct ieee80211_rate *br;
2451 int brate, rate, i, j, count = 0;
2452
2453 *rates = 0;
2454
2455 for (i = 0; i < srates_len; i++) {
2456 rate = srates[i] & 0x7f;
2457
2458 for (j = 0; j < sband->n_bitrates; j++) {
2459 br = &sband->bitrates[j];
2460 if ((rate_flags & br->flags) != rate_flags)
2461 continue;
2462
2463 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2464 if (brate == rate) {
2465 *rates |= BIT(j);
2466 count++;
2467 break;
2468 }
2469 }
2470 }
2471 return count;
2472}
2473
Johannes Bergfc8a7322012-06-28 10:33:25 +02002474int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002475 struct sk_buff *skb, bool need_basic,
2476 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03002477{
Arik Nemtsov768db342011-09-28 14:12:51 +03002478 struct ieee80211_local *local = sdata->local;
2479 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002480 int rate, shift;
Arik Nemtsov768db342011-09-28 14:12:51 +03002481 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002482 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002483 u32 rate_flags;
Arik Nemtsov768db342011-09-28 14:12:51 +03002484
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002485 shift = ieee80211_vif_get_shift(&sdata->vif);
2486 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
Johannes Berg6b778632012-07-23 14:53:27 +02002487 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002488 rates = 0;
2489 for (i = 0; i < sband->n_bitrates; i++) {
2490 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2491 continue;
2492 rates++;
2493 }
Arik Nemtsov768db342011-09-28 14:12:51 +03002494 if (rates > 8)
2495 rates = 8;
2496
2497 if (skb_tailroom(skb) < rates + 2)
2498 return -ENOMEM;
2499
2500 pos = skb_put(skb, rates + 2);
2501 *pos++ = WLAN_EID_SUPP_RATES;
2502 *pos++ = rates;
2503 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002504 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002505 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2506 continue;
2507
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002508 if (need_basic && basic_rates & BIT(i))
2509 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03002510 rate = sband->bitrates[i].bitrate;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002511 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2512 5 * (1 << shift));
2513 *pos++ = basic | (u8) rate;
Arik Nemtsov768db342011-09-28 14:12:51 +03002514 }
2515
2516 return 0;
2517}
2518
Johannes Bergfc8a7322012-06-28 10:33:25 +02002519int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002520 struct sk_buff *skb, bool need_basic,
2521 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03002522{
Arik Nemtsov768db342011-09-28 14:12:51 +03002523 struct ieee80211_local *local = sdata->local;
2524 struct ieee80211_supported_band *sband;
Chun-Yeow Yeohcc63ec72013-09-07 23:40:44 -07002525 int rate, shift;
Arik Nemtsov768db342011-09-28 14:12:51 +03002526 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002527 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002528 u32 rate_flags;
2529
2530 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2531 shift = ieee80211_vif_get_shift(&sdata->vif);
Arik Nemtsov768db342011-09-28 14:12:51 +03002532
Johannes Berg6b778632012-07-23 14:53:27 +02002533 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002534 exrates = 0;
2535 for (i = 0; i < sband->n_bitrates; i++) {
2536 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2537 continue;
2538 exrates++;
2539 }
2540
Arik Nemtsov768db342011-09-28 14:12:51 +03002541 if (exrates > 8)
2542 exrates -= 8;
2543 else
2544 exrates = 0;
2545
2546 if (skb_tailroom(skb) < exrates + 2)
2547 return -ENOMEM;
2548
2549 if (exrates) {
2550 pos = skb_put(skb, exrates + 2);
2551 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2552 *pos++ = exrates;
2553 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002554 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002555 if ((rate_flags & sband->bitrates[i].flags)
2556 != rate_flags)
2557 continue;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002558 if (need_basic && basic_rates & BIT(i))
2559 basic = 0x80;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002560 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2561 5 * (1 << shift));
2562 *pos++ = basic | (u8) rate;
Arik Nemtsov768db342011-09-28 14:12:51 +03002563 }
2564 }
2565 return 0;
2566}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002567
2568int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2569{
2570 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2571 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2572
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07002573 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2574 /* non-managed type inferfaces */
2575 return 0;
2576 }
Emmanuel Grumbach3a7bba62013-03-20 17:05:45 +02002577 return ifmgd->ave_beacon_signal / 16;
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002578}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07002579EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
Johannes Berg04ecd252012-09-11 14:34:12 +02002580
2581u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2582{
2583 if (!mcs)
2584 return 1;
2585
2586 /* TODO: consider rx_highest */
2587
2588 if (mcs->rx_mask[3])
2589 return 4;
2590 if (mcs->rx_mask[2])
2591 return 3;
2592 if (mcs->rx_mask[1])
2593 return 2;
2594 return 1;
2595}
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002596
2597/**
2598 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2599 * @local: mac80211 hw info struct
2600 * @status: RX status
2601 * @mpdu_len: total MPDU length (including FCS)
2602 * @mpdu_offset: offset into MPDU to calculate timestamp at
2603 *
2604 * This function calculates the RX timestamp at the given MPDU offset, taking
2605 * into account what the RX timestamp was. An offset of 0 will just normalize
2606 * the timestamp to TSF at beginning of MPDU reception.
2607 */
2608u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2609 struct ieee80211_rx_status *status,
2610 unsigned int mpdu_len,
2611 unsigned int mpdu_offset)
2612{
2613 u64 ts = status->mactime;
2614 struct rate_info ri;
2615 u16 rate;
2616
2617 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2618 return 0;
2619
2620 memset(&ri, 0, sizeof(ri));
2621
2622 /* Fill cfg80211 rate info */
2623 if (status->flag & RX_FLAG_HT) {
2624 ri.mcs = status->rate_idx;
2625 ri.flags |= RATE_INFO_FLAGS_MCS;
2626 if (status->flag & RX_FLAG_40MHZ)
Johannes Bergb51f3be2015-01-15 16:14:02 +01002627 ri.bw = RATE_INFO_BW_40;
2628 else
2629 ri.bw = RATE_INFO_BW_20;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002630 if (status->flag & RX_FLAG_SHORT_GI)
2631 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Johannes Berg56146182012-11-09 15:07:02 +01002632 } else if (status->flag & RX_FLAG_VHT) {
2633 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2634 ri.mcs = status->rate_idx;
2635 ri.nss = status->vht_nss;
2636 if (status->flag & RX_FLAG_40MHZ)
Johannes Bergb51f3be2015-01-15 16:14:02 +01002637 ri.bw = RATE_INFO_BW_40;
2638 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2639 ri.bw = RATE_INFO_BW_80;
2640 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2641 ri.bw = RATE_INFO_BW_160;
2642 else
2643 ri.bw = RATE_INFO_BW_20;
Johannes Berg56146182012-11-09 15:07:02 +01002644 if (status->flag & RX_FLAG_SHORT_GI)
2645 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002646 } else {
2647 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002648 int shift = 0;
2649 int bitrate;
2650
Johannes Bergb51f3be2015-01-15 16:14:02 +01002651 if (status->flag & RX_FLAG_10MHZ) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002652 shift = 1;
Johannes Bergb51f3be2015-01-15 16:14:02 +01002653 ri.bw = RATE_INFO_BW_10;
2654 } else if (status->flag & RX_FLAG_5MHZ) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002655 shift = 2;
Johannes Bergb51f3be2015-01-15 16:14:02 +01002656 ri.bw = RATE_INFO_BW_5;
2657 } else {
2658 ri.bw = RATE_INFO_BW_20;
2659 }
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002660
2661 sband = local->hw.wiphy->bands[status->band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002662 bitrate = sband->bitrates[status->rate_idx].bitrate;
2663 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002664 }
2665
2666 rate = cfg80211_calculate_bitrate(&ri);
Johannes Bergd86aa4f2013-10-11 15:47:06 +02002667 if (WARN_ONCE(!rate,
2668 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2669 status->flag, status->rate_idx, status->vht_nss))
2670 return 0;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002671
2672 /* rewind from end of MPDU */
2673 if (status->flag & RX_FLAG_MACTIME_END)
2674 ts -= mpdu_len * 8 * 10 / rate;
2675
2676 ts += mpdu_offset * 8 * 10 / rate;
2677
2678 return ts;
2679}
Simon Wunderlich164eb022013-02-08 18:16:20 +01002680
2681void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2682{
2683 struct ieee80211_sub_if_data *sdata;
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002684 struct cfg80211_chan_def chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002685
Johannes Berg34a37402013-12-18 09:43:33 +01002686 mutex_lock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002687 mutex_lock(&local->iflist_mtx);
2688 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg34a37402013-12-18 09:43:33 +01002689 /* it might be waiting for the local->mtx, but then
2690 * by the time it gets it, sdata->wdev.cac_started
2691 * will no longer be true
2692 */
2693 cancel_delayed_work(&sdata->dfs_cac_timer_work);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002694
2695 if (sdata->wdev.cac_started) {
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002696 chandef = sdata->vif.bss_conf.chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002697 ieee80211_vif_release_channel(sdata);
2698 cfg80211_cac_event(sdata->dev,
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002699 &chandef,
Simon Wunderlich164eb022013-02-08 18:16:20 +01002700 NL80211_RADAR_CAC_ABORTED,
2701 GFP_KERNEL);
2702 }
2703 }
2704 mutex_unlock(&local->iflist_mtx);
Johannes Berg34a37402013-12-18 09:43:33 +01002705 mutex_unlock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002706}
2707
2708void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2709{
2710 struct ieee80211_local *local =
2711 container_of(work, struct ieee80211_local, radar_detected_work);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002712 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
Michal Kazior486cf4c2014-10-10 12:43:23 +02002713 struct ieee80211_chanctx *ctx;
2714 int num_chanctx = 0;
2715
2716 mutex_lock(&local->chanctx_mtx);
2717 list_for_each_entry(ctx, &local->chanctx_list, list) {
2718 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2719 continue;
2720
2721 num_chanctx++;
2722 chandef = ctx->conf.def;
2723 }
2724 mutex_unlock(&local->chanctx_mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002725
2726 ieee80211_dfs_cac_cancel(local);
2727
Michal Kazior486cf4c2014-10-10 12:43:23 +02002728 if (num_chanctx > 1)
2729 /* XXX: multi-channel is not supported yet */
Simon Wunderlich164eb022013-02-08 18:16:20 +01002730 WARN_ON(1);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002731 else
Simon Wunderlich164eb022013-02-08 18:16:20 +01002732 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002733}
2734
2735void ieee80211_radar_detected(struct ieee80211_hw *hw)
2736{
2737 struct ieee80211_local *local = hw_to_local(hw);
2738
2739 trace_api_radar_detected(local);
2740
2741 ieee80211_queue_work(hw, &local->radar_detected_work);
2742}
2743EXPORT_SYMBOL(ieee80211_radar_detected);
Simon Wunderliche6b7cde2013-08-28 13:41:29 +02002744
2745u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2746{
2747 u32 ret;
2748 int tmp;
2749
2750 switch (c->width) {
2751 case NL80211_CHAN_WIDTH_20:
2752 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2753 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2754 break;
2755 case NL80211_CHAN_WIDTH_40:
2756 c->width = NL80211_CHAN_WIDTH_20;
2757 c->center_freq1 = c->chan->center_freq;
2758 ret = IEEE80211_STA_DISABLE_40MHZ |
2759 IEEE80211_STA_DISABLE_VHT;
2760 break;
2761 case NL80211_CHAN_WIDTH_80:
2762 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2763 /* n_P40 */
2764 tmp /= 2;
2765 /* freq_P40 */
2766 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2767 c->width = NL80211_CHAN_WIDTH_40;
2768 ret = IEEE80211_STA_DISABLE_VHT;
2769 break;
2770 case NL80211_CHAN_WIDTH_80P80:
2771 c->center_freq2 = 0;
2772 c->width = NL80211_CHAN_WIDTH_80;
2773 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2774 IEEE80211_STA_DISABLE_160MHZ;
2775 break;
2776 case NL80211_CHAN_WIDTH_160:
2777 /* n_P20 */
2778 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2779 /* n_P80 */
2780 tmp /= 4;
2781 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2782 c->width = NL80211_CHAN_WIDTH_80;
2783 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2784 IEEE80211_STA_DISABLE_160MHZ;
2785 break;
2786 default:
2787 case NL80211_CHAN_WIDTH_20_NOHT:
2788 WARN_ON_ONCE(1);
2789 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2790 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2791 break;
2792 case NL80211_CHAN_WIDTH_5:
2793 case NL80211_CHAN_WIDTH_10:
2794 WARN_ON_ONCE(1);
2795 /* keep c->width */
2796 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2797 break;
2798 }
2799
2800 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2801
2802 return ret;
2803}
Emmanuel Grumbach687da132013-10-01 16:45:43 +03002804
2805/*
2806 * Returns true if smps_mode_new is strictly more restrictive than
2807 * smps_mode_old.
2808 */
2809bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2810 enum ieee80211_smps_mode smps_mode_new)
2811{
2812 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2813 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2814 return false;
2815
2816 switch (smps_mode_old) {
2817 case IEEE80211_SMPS_STATIC:
2818 return false;
2819 case IEEE80211_SMPS_DYNAMIC:
2820 return smps_mode_new == IEEE80211_SMPS_STATIC;
2821 case IEEE80211_SMPS_OFF:
2822 return smps_mode_new != IEEE80211_SMPS_OFF;
2823 default:
2824 WARN_ON(1);
2825 }
2826
2827 return false;
2828}
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002829
2830int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2831 struct cfg80211_csa_settings *csa_settings)
2832{
2833 struct sk_buff *skb;
2834 struct ieee80211_mgmt *mgmt;
2835 struct ieee80211_local *local = sdata->local;
2836 int freq;
2837 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2838 sizeof(mgmt->u.action.u.chan_switch);
2839 u8 *pos;
2840
2841 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2842 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2843 return -EOPNOTSUPP;
2844
2845 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2846 5 + /* channel switch announcement element */
2847 3 + /* secondary channel offset element */
2848 8); /* mesh channel switch parameters element */
2849 if (!skb)
2850 return -ENOMEM;
2851
2852 skb_reserve(skb, local->tx_headroom);
2853 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2854 memset(mgmt, 0, hdr_len);
2855 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2856 IEEE80211_STYPE_ACTION);
2857
2858 eth_broadcast_addr(mgmt->da);
2859 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2860 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2861 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2862 } else {
2863 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2864 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2865 }
2866 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2867 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2868 pos = skb_put(skb, 5);
2869 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2870 *pos++ = 3; /* IE length */
2871 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2872 freq = csa_settings->chandef.chan->center_freq;
2873 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2874 *pos++ = csa_settings->count; /* count */
2875
2876 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2877 enum nl80211_channel_type ch_type;
2878
2879 skb_put(skb, 3);
2880 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2881 *pos++ = 1; /* IE length */
2882 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2883 if (ch_type == NL80211_CHAN_HT40PLUS)
2884 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2885 else
2886 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2887 }
2888
2889 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2890 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002891
2892 skb_put(skb, 8);
2893 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2894 *pos++ = 6; /* IE length */
2895 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2896 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2897 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2898 *pos++ |= csa_settings->block_tx ?
2899 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2900 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2901 pos += 2;
Chun-Yeow Yeohca91dc92013-11-12 10:31:48 +08002902 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002903 pos += 2;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002904 }
2905
2906 ieee80211_tx_skb(sdata, skb);
2907 return 0;
2908}
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002909
2910bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2911{
2912 return !(cs == NULL || cs->cipher == 0 ||
2913 cs->hdr_len < cs->pn_len + cs->pn_off ||
2914 cs->hdr_len <= cs->key_idx_off ||
2915 cs->key_idx_shift > 7 ||
2916 cs->key_idx_mask == 0);
2917}
2918
2919bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2920{
2921 int i;
2922
2923 /* Ensure we have enough iftype bitmap space for all iftype values */
2924 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2925
2926 for (i = 0; i < n; i++)
2927 if (!ieee80211_cs_valid(&cs[i]))
2928 return false;
2929
2930 return true;
2931}
2932
2933const struct ieee80211_cipher_scheme *
2934ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2935 enum nl80211_iftype iftype)
2936{
2937 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2938 int n = local->hw.n_cipher_schemes;
2939 int i;
2940 const struct ieee80211_cipher_scheme *cs = NULL;
2941
2942 for (i = 0; i < n; i++) {
2943 if (l[i].cipher == cipher) {
2944 cs = &l[i];
2945 break;
2946 }
2947 }
2948
2949 if (!cs || !(cs->iftype & BIT(iftype)))
2950 return NULL;
2951
2952 return cs;
2953}
2954
2955int ieee80211_cs_headroom(struct ieee80211_local *local,
2956 struct cfg80211_crypto_settings *crypto,
2957 enum nl80211_iftype iftype)
2958{
2959 const struct ieee80211_cipher_scheme *cs;
2960 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2961 int i;
2962
2963 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2964 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2965 iftype);
2966
2967 if (cs && headroom < cs->hdr_len)
2968 headroom = cs->hdr_len;
2969 }
2970
2971 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2972 if (cs && headroom < cs->hdr_len)
2973 headroom = cs->hdr_len;
2974
2975 return headroom;
2976}
Felix Fietkaua7022e62013-12-16 21:49:14 +01002977
2978static bool
2979ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2980{
2981 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2982 int skip;
2983
2984 if (end > 0)
2985 return false;
2986
2987 /* End time is in the past, check for repetitions */
2988 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2989 if (data->count[i] < 255) {
2990 if (data->count[i] <= skip) {
2991 data->count[i] = 0;
2992 return false;
2993 }
2994
2995 data->count[i] -= skip;
2996 }
2997
2998 data->desc[i].start += skip * data->desc[i].interval;
2999
3000 return true;
3001}
3002
3003static bool
3004ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3005 s32 *offset)
3006{
3007 bool ret = false;
3008 int i;
3009
3010 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3011 s32 cur;
3012
3013 if (!data->count[i])
3014 continue;
3015
3016 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3017 ret = true;
3018
3019 cur = data->desc[i].start - tsf;
3020 if (cur > *offset)
3021 continue;
3022
3023 cur = data->desc[i].start + data->desc[i].duration - tsf;
3024 if (cur > *offset)
3025 *offset = cur;
3026 }
3027
3028 return ret;
3029}
3030
3031static u32
3032ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3033{
3034 s32 offset = 0;
3035 int tries = 0;
3036 /*
3037 * arbitrary limit, used to avoid infinite loops when combined NoA
3038 * descriptors cover the full time period.
3039 */
3040 int max_tries = 5;
3041
3042 ieee80211_extend_absent_time(data, tsf, &offset);
3043 do {
3044 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3045 break;
3046
3047 tries++;
3048 } while (tries < max_tries);
3049
3050 return offset;
3051}
3052
3053void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3054{
3055 u32 next_offset = BIT(31) - 1;
3056 int i;
3057
3058 data->absent = 0;
3059 data->has_next_tsf = false;
3060 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3061 s32 start;
3062
3063 if (!data->count[i])
3064 continue;
3065
3066 ieee80211_extend_noa_desc(data, tsf, i);
3067 start = data->desc[i].start - tsf;
3068 if (start <= 0)
3069 data->absent |= BIT(i);
3070
3071 if (next_offset > start)
3072 next_offset = start;
3073
3074 data->has_next_tsf = true;
3075 }
3076
3077 if (data->absent)
3078 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3079
3080 data->next_tsf = tsf + next_offset;
3081}
3082EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3083
3084int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3085 struct ieee80211_noa_data *data, u32 tsf)
3086{
3087 int ret = 0;
3088 int i;
3089
3090 memset(data, 0, sizeof(*data));
3091
3092 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3093 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3094
3095 if (!desc->count || !desc->duration)
3096 continue;
3097
3098 data->count[i] = desc->count;
3099 data->desc[i].start = le32_to_cpu(desc->start_time);
3100 data->desc[i].duration = le32_to_cpu(desc->duration);
3101 data->desc[i].interval = le32_to_cpu(desc->interval);
3102
3103 if (data->count[i] > 1 &&
3104 data->desc[i].interval < data->desc[i].duration)
3105 continue;
3106
3107 ieee80211_extend_noa_desc(data, tsf, i);
3108 ret++;
3109 }
3110
3111 if (ret)
3112 ieee80211_update_p2p_noa(data, tsf);
3113
3114 return ret;
3115}
3116EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
Thomas Pedersen057d5f42013-12-19 10:25:15 -08003117
3118void ieee80211_recalc_dtim(struct ieee80211_local *local,
3119 struct ieee80211_sub_if_data *sdata)
3120{
3121 u64 tsf = drv_get_tsf(local, sdata);
3122 u64 dtim_count = 0;
3123 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3124 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3125 struct ps_data *ps;
3126 u8 bcns_from_dtim;
3127
3128 if (tsf == -1ULL || !beacon_int || !dtim_period)
3129 return;
3130
3131 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3132 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3133 if (!sdata->bss)
3134 return;
3135
3136 ps = &sdata->bss->ps;
3137 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3138 ps = &sdata->u.mesh.ps;
3139 } else {
3140 return;
3141 }
3142
3143 /*
3144 * actually finds last dtim_count, mac80211 will update in
3145 * __beacon_add_tim().
3146 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3147 */
3148 do_div(tsf, beacon_int);
3149 bcns_from_dtim = do_div(tsf, dtim_period);
3150 /* just had a DTIM */
3151 if (!bcns_from_dtim)
3152 dtim_count = 0;
3153 else
3154 dtim_count = dtim_period - bcns_from_dtim;
3155
3156 ps->dtim_count = dtim_count;
3157}
Luciano Coelho73de86a2014-02-13 11:31:59 +02003158
Michal Kazior71e61952014-06-25 12:35:07 +02003159static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3160 struct ieee80211_chanctx *ctx)
3161{
3162 struct ieee80211_sub_if_data *sdata;
3163 u8 radar_detect = 0;
3164
3165 lockdep_assert_held(&local->chanctx_mtx);
3166
3167 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3168 return 0;
3169
3170 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3171 if (sdata->reserved_radar_required)
3172 radar_detect |= BIT(sdata->reserved_chandef.width);
3173
3174 /*
3175 * An in-place reservation context should not have any assigned vifs
3176 * until it replaces the other context.
3177 */
3178 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3179 !list_empty(&ctx->assigned_vifs));
3180
3181 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3182 if (sdata->radar_required)
3183 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3184
3185 return radar_detect;
3186}
3187
Luciano Coelho73de86a2014-02-13 11:31:59 +02003188int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3189 const struct cfg80211_chan_def *chandef,
3190 enum ieee80211_chanctx_mode chanmode,
3191 u8 radar_detect)
3192{
3193 struct ieee80211_local *local = sdata->local;
3194 struct ieee80211_sub_if_data *sdata_iter;
3195 enum nl80211_iftype iftype = sdata->wdev.iftype;
3196 int num[NUM_NL80211_IFTYPES];
3197 struct ieee80211_chanctx *ctx;
Luciano Coelhob6a55012014-02-27 11:07:21 +02003198 int num_different_channels = 0;
Luciano Coelho73de86a2014-02-13 11:31:59 +02003199 int total = 1;
3200
3201 lockdep_assert_held(&local->chanctx_mtx);
3202
3203 if (WARN_ON(hweight32(radar_detect) > 1))
3204 return -EINVAL;
3205
Luciano Coelhob6a55012014-02-27 11:07:21 +02003206 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3207 !chandef->chan))
Luciano Coelho73de86a2014-02-13 11:31:59 +02003208 return -EINVAL;
3209
Luciano Coelhob6a55012014-02-27 11:07:21 +02003210 if (chandef)
3211 num_different_channels = 1;
3212
Luciano Coelho73de86a2014-02-13 11:31:59 +02003213 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3214 return -EINVAL;
3215
3216 /* Always allow software iftypes */
3217 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3218 if (radar_detect)
3219 return -EINVAL;
3220 return 0;
3221 }
3222
3223 memset(num, 0, sizeof(num));
3224
3225 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3226 num[iftype] = 1;
3227
3228 list_for_each_entry(ctx, &local->chanctx_list, list) {
Michal Kazior5bcae312014-06-25 12:35:06 +02003229 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3230 continue;
Michal Kazior71e61952014-06-25 12:35:07 +02003231 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
Luciano Coelho73de86a2014-02-13 11:31:59 +02003232 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3233 num_different_channels++;
3234 continue;
3235 }
Luciano Coelhob6a55012014-02-27 11:07:21 +02003236 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
Luciano Coelho73de86a2014-02-13 11:31:59 +02003237 cfg80211_chandef_compatible(chandef,
3238 &ctx->conf.def))
3239 continue;
3240 num_different_channels++;
3241 }
3242
3243 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3244 struct wireless_dev *wdev_iter;
3245
3246 wdev_iter = &sdata_iter->wdev;
3247
3248 if (sdata_iter == sdata ||
Andrei Otcheretianski0f611d22015-03-12 08:53:30 +02003249 !ieee80211_sdata_running(sdata_iter) ||
Luciano Coelho73de86a2014-02-13 11:31:59 +02003250 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3251 continue;
3252
3253 num[wdev_iter->iftype]++;
3254 total++;
3255 }
3256
3257 if (total == 1 && !radar_detect)
3258 return 0;
3259
3260 return cfg80211_check_combinations(local->hw.wiphy,
3261 num_different_channels,
3262 radar_detect, num);
3263}
Michal Kazior6fa001b2014-04-09 15:29:23 +02003264
3265static void
3266ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3267 void *data)
3268{
3269 u32 *max_num_different_channels = data;
3270
3271 *max_num_different_channels = max(*max_num_different_channels,
3272 c->num_different_channels);
3273}
3274
3275int ieee80211_max_num_channels(struct ieee80211_local *local)
3276{
3277 struct ieee80211_sub_if_data *sdata;
3278 int num[NUM_NL80211_IFTYPES] = {};
3279 struct ieee80211_chanctx *ctx;
3280 int num_different_channels = 0;
3281 u8 radar_detect = 0;
3282 u32 max_num_different_channels = 1;
3283 int err;
3284
3285 lockdep_assert_held(&local->chanctx_mtx);
3286
3287 list_for_each_entry(ctx, &local->chanctx_list, list) {
Michal Kazior5bcae312014-06-25 12:35:06 +02003288 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3289 continue;
3290
Michal Kazior6fa001b2014-04-09 15:29:23 +02003291 num_different_channels++;
3292
Michal Kazior71e61952014-06-25 12:35:07 +02003293 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
Michal Kazior6fa001b2014-04-09 15:29:23 +02003294 }
3295
3296 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3297 num[sdata->wdev.iftype]++;
3298
3299 err = cfg80211_iter_combinations(local->hw.wiphy,
3300 num_different_channels, radar_detect,
3301 num, ieee80211_iter_max_chans,
3302 &max_num_different_channels);
3303 if (err < 0)
3304 return err;
3305
3306 return max_num_different_channels;
3307}
Arik Nemtsov40b861a2014-07-17 17:14:23 +03003308
3309u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3310{
3311 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3312 *buf++ = 7; /* len */
3313 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3314 *buf++ = 0x50;
3315 *buf++ = 0xf2;
3316 *buf++ = 2; /* WME */
3317 *buf++ = 0; /* WME info */
3318 *buf++ = 1; /* WME ver */
3319 *buf++ = qosinfo; /* U-APSD no in use */
3320
3321 return buf;
3322}
Felix Fietkauba8c3d62015-03-27 21:30:37 +01003323
3324void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3325 struct sta_info *sta,
3326 struct txq_info *txqi, int tid)
3327{
3328 skb_queue_head_init(&txqi->queue);
3329 txqi->txq.vif = &sdata->vif;
3330
3331 if (sta) {
3332 txqi->txq.sta = &sta->sta;
3333 sta->sta.txq[tid] = &txqi->txq;
3334 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3335 } else {
3336 sdata->vif.txq = &txqi->txq;
3337 txqi->txq.ac = IEEE80211_AC_BE;
3338 }
3339}