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Johannes Bergc2d15602007-07-27 15:43:23 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
Johannes Bergd98ad832014-09-03 15:24:57 +03006 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Bergc2d15602007-07-27 15:43:23 +02007 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15#include <net/mac80211.h>
16#include <linux/netdevice.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040017#include <linux/export.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020018#include <linux/types.h>
19#include <linux/slab.h>
20#include <linux/skbuff.h>
21#include <linux/etherdevice.h>
22#include <linux/if_arp.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020023#include <linux/bitmap.h>
Johannes Bergdd769862011-11-18 16:54:50 +010024#include <linux/crc32.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070025#include <net/net_namespace.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020026#include <net/cfg80211.h>
Johannes Bergdabeb342007-11-09 01:57:29 +010027#include <net/rtnetlink.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020028
29#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020030#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040031#include "rate.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010032#include "mesh.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020033#include "wme.h"
Johannes Bergf2753dd2009-04-14 10:09:24 +020034#include "led.h"
Johannes Bergfffd0932009-07-08 14:22:54 +020035#include "wep.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020036
37/* privid for wiphys to determine whether they belong to us or not */
Johannes Berg8a47cea2014-01-20 23:55:44 +010038const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
Johannes Bergc2d15602007-07-27 15:43:23 +020039
Luis R. Rodriguez9a953712009-01-22 15:05:53 -080040struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41{
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47}
48EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
Johannes Bergc2d15602007-07-27 15:43:23 +020049
Ron Rindjunsky71364712007-12-25 17:00:36 +020050u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
Johannes Berg05c914f2008-09-11 00:01:58 +020051 enum nl80211_iftype type)
Johannes Bergc2d15602007-07-27 15:43:23 +020052{
Harvey Harrisona494bb12008-06-11 14:21:58 -070053 __le16 fc = hdr->frame_control;
Johannes Bergc2d15602007-07-27 15:43:23 +020054
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020055 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
Johannes Bergc2d15602007-07-27 15:43:23 +020057 return NULL;
58
Harvey Harrisona494bb12008-06-11 14:21:58 -070059 if (ieee80211_is_data(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020060 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070062
63 if (ieee80211_has_a4(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020064 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070065 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020068 return hdr->addr2;
Harvey Harrisona494bb12008-06-11 14:21:58 -070069
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020074 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
Johannes Bergc2d15602007-07-27 15:43:23 +020076 return hdr->addr3;
Harvey Harrisona494bb12008-06-11 14:21:58 -070077 }
78
79 if (ieee80211_is_ctl(fc)) {
Weilong Chenf359d3f2013-12-18 15:44:16 +080080 if (ieee80211_is_pspoll(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020081 return hdr->addr1;
Harvey Harrisona494bb12008-06-11 14:21:58 -070082
83 if (ieee80211_is_back_req(fc)) {
Ron Rindjunsky71364712007-12-25 17:00:36 +020084 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +020085 case NL80211_IFTYPE_STATION:
Ron Rindjunsky71364712007-12-25 17:00:36 +020086 return hdr->addr2;
Johannes Berg05c914f2008-09-11 00:01:58 +020087 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
Ron Rindjunsky71364712007-12-25 17:00:36 +020089 return hdr->addr1;
90 default:
Harvey Harrisona494bb12008-06-11 14:21:58 -070091 break; /* fall through to the return */
Ron Rindjunsky71364712007-12-25 17:00:36 +020092 }
93 }
Johannes Bergc2d15602007-07-27 15:43:23 +020094 }
95
96 return NULL;
97}
98
Johannes Berg5cf121c2008-02-25 16:27:43 +010099void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Bergc2d15602007-07-27 15:43:23 +0200100{
Johannes Berg252b86c2011-11-16 15:28:55 +0100101 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100102 struct ieee80211_hdr *hdr;
Johannes Bergc2d15602007-07-27 15:43:23 +0200103
Johannes Berg252b86c2011-11-16 15:28:55 +0100104 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
Johannes Berg252b86c2011-11-16 15:28:55 +0100107 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200108}
109
Michal Kazior4ee73f32012-04-11 08:47:56 +0200110int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200111 int rate, int erp, int short_preamble,
112 int shift)
Johannes Bergc2d15602007-07-27 15:43:23 +0200113{
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
Johannes Bergc2d15602007-07-27 15:43:23 +0200126 */
127
Michal Kazior4ee73f32012-04-11 08:47:56 +0200128 if (band == IEEE80211_BAND_5GHZ || erp) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
Johannes Bergc2d15602007-07-27 15:43:23 +0200139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
Johannes Bergc2d15602007-07-27 15:43:23 +0200142 dur = 16; /* SIFS + signal ext */
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
Johannes Bergc2d15602007-07-27 15:43:23 +0200157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175}
176
177/* Exported duration function for driver use */
Johannes Berg32bfd352007-12-19 01:31:26 +0100178__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
Michal Kazior4ee73f32012-04-11 08:47:56 +0200180 enum ieee80211_band band,
Johannes Berg8318d782008-01-24 19:38:38 +0100181 size_t frame_len,
182 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200183{
Johannes Berg25d834e2008-09-12 22:52:47 +0200184 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200185 u16 dur;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200186 int erp, shift = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200187 bool short_preamble = false;
Johannes Bergc2d15602007-07-27 15:43:23 +0200188
Johannes Berg8318d782008-01-24 19:38:38 +0100189 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200190 if (vif) {
191 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200195 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200196 }
Johannes Berg8318d782008-01-24 19:38:38 +0100197
Michal Kazior4ee73f32012-04-11 08:47:56 +0200198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200199 short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200200
201 return cpu_to_le16(dur);
202}
203EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
Johannes Berg32bfd352007-12-19 01:31:26 +0100205__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200207 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200208{
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200211 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100212 bool short_preamble;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200213 int erp, shift = 0, bitrate;
Johannes Bergc2d15602007-07-27 15:43:23 +0200214 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200215 struct ieee80211_supported_band *sband;
216
Michal Kazior4ee73f32012-04-11 08:47:56 +0200217 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200218
Johannes Berg25d834e2008-09-12 22:52:47 +0200219 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200220
Johannes Berge039fa42008-05-15 12:55:29 +0200221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100222
223 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200224 if (vif) {
225 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200229 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200230 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200231
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
Johannes Bergc2d15602007-07-27 15:43:23 +0200234 /* CTS duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200236 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200237 /* Data frame duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200239 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200240 /* ACK duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200242 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200243
244 return cpu_to_le16(dur);
245}
246EXPORT_SYMBOL(ieee80211_rts_duration);
247
Johannes Berg32bfd352007-12-19 01:31:26 +0100248__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
Johannes Bergc2d15602007-07-27 15:43:23 +0200250 size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200251 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200252{
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200255 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100256 bool short_preamble;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200257 int erp, shift = 0, bitrate;
Johannes Bergc2d15602007-07-27 15:43:23 +0200258 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200259 struct ieee80211_supported_band *sband;
260
Michal Kazior4ee73f32012-04-11 08:47:56 +0200261 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200262
Johannes Berg25d834e2008-09-12 22:52:47 +0200263 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200264
Johannes Berge039fa42008-05-15 12:55:29 +0200265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100266 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200267 if (vif) {
268 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200272 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200273 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200274
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
Johannes Bergc2d15602007-07-27 15:43:23 +0200277 /* Data frame duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200279 erp, short_preamble, shift);
Johannes Berge039fa42008-05-15 12:55:29 +0200280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200281 /* ACK duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200283 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200284 }
285
Johannes Bergc2d15602007-07-27 15:43:23 +0200286 return cpu_to_le16(dur);
287}
288EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200290void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291{
292 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
Johannes Bergf142c6b2012-06-18 20:07:15 +0200301 if (!sdata->dev)
302 continue;
303
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
Johannes Berga6f38ac2012-07-04 12:49:59 +0200308 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200309 int ac_queue = sdata->vif.hw_queue[ac];
310
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318}
319
Kalle Valoce7c9112008-12-18 23:35:20 +0200320static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300321 enum queue_stop_reason reason,
322 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200323{
324 struct ieee80211_local *local = hw_to_local(hw);
325
Johannes Bergb5878a22010-04-07 16:48:40 +0200326 trace_wake_queue(local, queue, reason);
327
Johannes Berge4e72fb2009-03-23 17:28:42 +0100328 if (WARN_ON(queue >= hw->queues))
329 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200330
Johannes Bergada15122012-03-28 11:04:27 +0200331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
Luciano Coelhocca07b02014-06-13 16:30:05 +0300334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Berg96f5e662009-02-12 00:51:53 +0100341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
Johannes Berg7236fe22010-03-22 13:42:43 -0700346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200348 ieee80211_propagate_queue_wake(local, queue);
Johannes Berg7236fe22010-03-22 13:42:43 -0700349 rcu_read_unlock();
350 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200351 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200352}
Kalle Valoce7c9112008-12-18 23:35:20 +0200353
Johannes Berg96f5e662009-02-12 00:51:53 +0100354void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300355 enum queue_stop_reason reason,
356 bool refcounted)
Kalle Valoce7c9112008-12-18 23:35:20 +0200357{
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364}
365
366void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367{
368 ieee80211_wake_queue_by_reason(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
Kalle Valoce7c9112008-12-18 23:35:20 +0200371}
Johannes Bergc2d15602007-07-27 15:43:23 +0200372EXPORT_SYMBOL(ieee80211_wake_queue);
373
Kalle Valoce7c9112008-12-18 23:35:20 +0200374static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300375 enum queue_stop_reason reason,
376 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200377{
378 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100379 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200380 int n_acs = IEEE80211_NUM_ACS;
Johannes Bergc2d15602007-07-27 15:43:23 +0200381
Johannes Bergb5878a22010-04-07 16:48:40 +0200382 trace_stop_queue(local, queue, reason);
383
Johannes Berge4e72fb2009-03-23 17:28:42 +0100384 if (WARN_ON(queue >= hw->queues))
385 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100386
Luciano Coelhocca07b02014-06-13 16:30:05 +0300387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
Johannes Bergada15122012-03-28 11:04:27 +0200391
Luciano Coelhocca07b02014-06-13 16:30:05 +0300392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
Johannes Bergcf0277e2010-01-05 18:00:58 +0100394
Johannes Berga6f38ac2012-07-04 12:49:59 +0200395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
Johannes Bergcf0277e2010-01-05 18:00:58 +0100398 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
Johannes Bergf142c6b2012-06-18 20:07:15 +0200402 if (!sdata->dev)
403 continue;
404
Johannes Berga6f38ac2012-07-04 12:49:59 +0200405 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
Johannes Bergcf0277e2010-01-05 18:00:58 +0100411 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200412}
Kalle Valoce7c9112008-12-18 23:35:20 +0200413
Johannes Berg96f5e662009-02-12 00:51:53 +0100414void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300415 enum queue_stop_reason reason,
416 bool refcounted)
Kalle Valoce7c9112008-12-18 23:35:20 +0200417{
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424}
425
426void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427{
428 ieee80211_stop_queue_by_reason(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
Kalle Valoce7c9112008-12-18 23:35:20 +0200431}
Johannes Bergc2d15602007-07-27 15:43:23 +0200432EXPORT_SYMBOL(ieee80211_stop_queue);
433
Johannes Berg8f77f382009-06-07 21:58:37 +0200434void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436{
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
Johannes Berga7bc3762009-07-27 10:33:31 +0200439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200440 int queue = info->hw_queue;
Johannes Berga7bc3762009-07-27 10:33:31 +0200441
442 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200443 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200444 return;
445 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200450 __skb_queue_tail(&local->pending[queue], skb);
Luciano Coelhocca07b02014-06-13 16:30:05 +0300451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
Johannes Berg8f77f382009-06-07 21:58:37 +0200453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454}
455
Johannes Berge3685e02014-02-20 11:19:58 +0100456void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
Johannes Berg8f77f382009-06-07 21:58:37 +0200458{
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
Johannes Bergb0b97a82011-09-29 16:04:30 +0200462 int queue, i;
Johannes Berg8f77f382009-06-07 21:58:37 +0200463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200465 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200469 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200470 continue;
471 }
472
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200473 queue = info->hw_queue;
Johannes Berg4644ae82012-03-28 11:04:28 +0200474
475 __ieee80211_stop_queue(hw, queue,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
Johannes Berg4644ae82012-03-28 11:04:28 +0200478
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200479 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200480 }
481
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200482 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200483 __ieee80211_wake_queue(hw, i,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
Johannes Berg8f77f382009-06-07 21:58:37 +0200486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200487}
488
Kalle Valoce7c9112008-12-18 23:35:20 +0200489void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100490 unsigned long queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300491 enum queue_stop_reason reason,
492 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200493{
Kalle Valoce7c9112008-12-18 23:35:20 +0200494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200496 int i;
497
Kalle Valoce7c9112008-12-18 23:35:20 +0200498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
Johannes Berg445ea4e2013-02-13 12:25:28 +0100500 for_each_set_bit(i, &queues, hw->queues)
Luciano Coelhocca07b02014-06-13 16:30:05 +0300501 __ieee80211_stop_queue(hw, i, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504}
505
506void ieee80211_stop_queues(struct ieee80211_hw *hw)
507{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
Johannes Bergc2d15602007-07-27 15:43:23 +0200511}
512EXPORT_SYMBOL(ieee80211_stop_queues);
513
Tomas Winkler92ab8532008-07-24 21:02:04 +0300514int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515{
516 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200517 unsigned long flags;
518 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100519
Johannes Berge4e72fb2009-03-23 17:28:42 +0100520 if (WARN_ON(queue >= hw->queues))
521 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100522
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Thomas Pedersen2419ea12013-04-10 15:41:40 -0700524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300528}
529EXPORT_SYMBOL(ieee80211_queue_stopped);
530
Kalle Valoce7c9112008-12-18 23:35:20 +0200531void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100532 unsigned long queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300533 enum queue_stop_reason reason,
534 bool refcounted)
Johannes Bergc2d15602007-07-27 15:43:23 +0200535{
Kalle Valoce7c9112008-12-18 23:35:20 +0200536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200538 int i;
539
Kalle Valoce7c9112008-12-18 23:35:20 +0200540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
Johannes Berg445ea4e2013-02-13 12:25:28 +0100542 for_each_set_bit(i, &queues, hw->queues)
Luciano Coelhocca07b02014-06-13 16:30:05 +0300543 __ieee80211_wake_queue(hw, i, reason, refcounted);
Kalle Valoce7c9112008-12-18 23:35:20 +0200544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546}
547
548void ieee80211_wake_queues(struct ieee80211_hw *hw)
549{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
Johannes Bergc2d15602007-07-27 15:43:23 +0200553}
554EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100555
Luciano Coelho26da23b2014-06-13 16:30:06 +0300556static unsigned int
557ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
Johannes Berg39ecc012013-02-13 12:11:00 +0100559{
Luciano Coelho26da23b2014-06-13 16:30:06 +0300560 unsigned int queues;
Johannes Berg39ecc012013-02-13 12:11:00 +0100561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
Luciano Coelho26da23b2014-06-13 16:30:06 +0300576 return queues;
577}
578
Liad Kaufman4f9610d2014-11-09 18:50:21 +0200579void __ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
581 unsigned int queues)
Luciano Coelho26da23b2014-06-13 16:30:06 +0300582{
Luciano Coelho26da23b2014-06-13 16:30:06 +0300583 if (!local->ops->flush)
584 return;
585
Liad Kaufman4f9610d2014-11-09 18:50:21 +0200586 /*
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
589 */
590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591 queues = ieee80211_get_vif_queues(local, sdata);
Luciano Coelho26da23b2014-06-13 16:30:06 +0300592
Luciano Coelho59f48fe2014-06-13 16:30:04 +0300593 ieee80211_stop_queues_by_reason(&local->hw, queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300594 IEEE80211_QUEUE_STOP_REASON_FLUSH,
595 false);
Johannes Berg445ea4e2013-02-13 12:25:28 +0100596
Emmanuel Grumbach77be2c52014-03-27 11:30:29 +0200597 drv_flush(local, sdata, queues, false);
Johannes Berg445ea4e2013-02-13 12:25:28 +0100598
Luciano Coelho59f48fe2014-06-13 16:30:04 +0300599 ieee80211_wake_queues_by_reason(&local->hw, queues,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300600 IEEE80211_QUEUE_STOP_REASON_FLUSH,
601 false);
Johannes Berg39ecc012013-02-13 12:11:00 +0100602}
603
Liad Kaufman4f9610d2014-11-09 18:50:21 +0200604void ieee80211_flush_queues(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata)
606{
607 __ieee80211_flush_queues(local, sdata, 0);
608}
609
Luciano Coelho26da23b2014-06-13 16:30:06 +0300610void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611 struct ieee80211_sub_if_data *sdata,
612 enum queue_stop_reason reason)
613{
614 ieee80211_stop_queues_by_reason(&local->hw,
615 ieee80211_get_vif_queues(local, sdata),
616 reason, true);
617}
618
619void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata,
621 enum queue_stop_reason reason)
622{
623 ieee80211_wake_queues_by_reason(&local->hw,
624 ieee80211_get_vif_queues(local, sdata),
625 reason, true);
626}
627
Johannes Bergc7c71062013-08-21 22:07:20 +0200628static void __iterate_active_interfaces(struct ieee80211_local *local,
629 u32 iter_flags,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
632 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100633{
Johannes Bergdabeb342007-11-09 01:57:29 +0100634 struct ieee80211_sub_if_data *sdata;
635
Johannes Berge38bad42007-11-28 10:55:32 +0100636 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100637 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200638 case NL80211_IFTYPE_MONITOR:
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200639 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
640 continue;
641 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200642 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100643 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200644 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100645 break;
646 }
Johannes Berg8b2c9822012-11-06 20:23:30 +0100647 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
648 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
649 continue;
Johannes Berg9607e6b662009-12-23 13:15:31 +0100650 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100651 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100652 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100653 }
Johannes Berge38bad42007-11-28 10:55:32 +0100654
Johannes Bergc7c71062013-08-21 22:07:20 +0200655 sdata = rcu_dereference_check(local->monitor_sdata,
656 lockdep_is_held(&local->iflist_mtx) ||
657 lockdep_rtnl_is_held());
Johannes Berg8b2c9822012-11-06 20:23:30 +0100658 if (sdata &&
659 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
660 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg685fb722012-07-11 16:38:09 +0200661 iterator(data, sdata->vif.addr, &sdata->vif);
Johannes Bergc7c71062013-08-21 22:07:20 +0200662}
Johannes Berg685fb722012-07-11 16:38:09 +0200663
Johannes Bergc7c71062013-08-21 22:07:20 +0200664void ieee80211_iterate_active_interfaces(
665 struct ieee80211_hw *hw, u32 iter_flags,
666 void (*iterator)(void *data, u8 *mac,
667 struct ieee80211_vif *vif),
668 void *data)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 mutex_lock(&local->iflist_mtx);
673 __iterate_active_interfaces(local, iter_flags, iterator, data);
674 mutex_unlock(&local->iflist_mtx);
675}
676EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
677
678void ieee80211_iterate_active_interfaces_atomic(
679 struct ieee80211_hw *hw, u32 iter_flags,
680 void (*iterator)(void *data, u8 *mac,
681 struct ieee80211_vif *vif),
682 void *data)
683{
684 struct ieee80211_local *local = hw_to_local(hw);
685
686 rcu_read_lock();
687 __iterate_active_interfaces(local, iter_flags, iterator, data);
Johannes Berge38bad42007-11-28 10:55:32 +0100688 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100689}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200690EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200691
Johannes Bergc7c71062013-08-21 22:07:20 +0200692void ieee80211_iterate_active_interfaces_rtnl(
693 struct ieee80211_hw *hw, u32 iter_flags,
694 void (*iterator)(void *data, u8 *mac,
695 struct ieee80211_vif *vif),
696 void *data)
697{
698 struct ieee80211_local *local = hw_to_local(hw);
699
700 ASSERT_RTNL();
701
702 __iterate_active_interfaces(local, iter_flags, iterator, data);
703}
704EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
705
Arik Nemtsov0fc1e042014-10-22 12:30:59 +0300706static void __iterate_stations(struct ieee80211_local *local,
707 void (*iterator)(void *data,
708 struct ieee80211_sta *sta),
709 void *data)
710{
711 struct sta_info *sta;
712
713 list_for_each_entry_rcu(sta, &local->sta_list, list) {
714 if (!sta->uploaded)
715 continue;
716
717 iterator(data, &sta->sta);
718 }
719}
720
721void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
722 void (*iterator)(void *data,
723 struct ieee80211_sta *sta),
724 void *data)
725{
726 struct ieee80211_local *local = hw_to_local(hw);
727
728 rcu_read_lock();
729 __iterate_stations(local, iterator, data);
730 rcu_read_unlock();
731}
732EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
733
Johannes Bergad7e7182013-11-13 13:37:47 +0100734struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
735{
736 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
737
738 if (!ieee80211_sdata_running(sdata) ||
739 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
740 return NULL;
741 return &sdata->vif;
742}
743EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
744
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400745/*
746 * Nothing should have been stuffed into the workqueue during
747 * the suspend->resume cycle. If this WARN is seen then there
748 * is a bug with either the driver suspend or something in
749 * mac80211 stuffing into the workqueue which we haven't yet
750 * cleared during mac80211's suspend cycle.
751 */
752static bool ieee80211_can_queue_work(struct ieee80211_local *local)
753{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100754 if (WARN(local->suspended && !local->resuming,
755 "queueing ieee80211 work while going to suspend\n"))
756 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400757
758 return true;
759}
760
761void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
762{
763 struct ieee80211_local *local = hw_to_local(hw);
764
765 if (!ieee80211_can_queue_work(local))
766 return;
767
768 queue_work(local->workqueue, work);
769}
770EXPORT_SYMBOL(ieee80211_queue_work);
771
772void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
773 struct delayed_work *dwork,
774 unsigned long delay)
775{
776 struct ieee80211_local *local = hw_to_local(hw);
777
778 if (!ieee80211_can_queue_work(local))
779 return;
780
781 queue_delayed_work(local->workqueue, dwork, delay);
782}
783EXPORT_SYMBOL(ieee80211_queue_delayed_work);
784
Johannes Berg35d865a2013-05-28 10:54:03 +0200785u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
Johannes Bergdd769862011-11-18 16:54:50 +0100786 struct ieee802_11_elems *elems,
787 u64 filter, u32 crc)
788{
789 size_t left = len;
Johannes Berg35d865a2013-05-28 10:54:03 +0200790 const u8 *pos = start;
Johannes Bergdd769862011-11-18 16:54:50 +0100791 bool calc_crc = filter != 0;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800792 DECLARE_BITMAP(seen_elems, 256);
Johannes Bergb2e506b2013-03-26 14:54:16 +0100793 const u8 *ie;
Johannes Bergdd769862011-11-18 16:54:50 +0100794
Paul Stewartfcff4f12012-02-23 17:59:53 -0800795 bitmap_zero(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100796 memset(elems, 0, sizeof(*elems));
797 elems->ie_start = start;
798 elems->total_len = len;
799
800 while (left >= 2) {
801 u8 id, elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800802 bool elem_parse_failed;
Johannes Bergdd769862011-11-18 16:54:50 +0100803
804 id = *pos++;
805 elen = *pos++;
806 left -= 2;
807
Paul Stewartfcff4f12012-02-23 17:59:53 -0800808 if (elen > left) {
809 elems->parse_error = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100810 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800811 }
812
Johannes Berg9690fb12012-10-24 14:19:53 +0200813 switch (id) {
814 case WLAN_EID_SSID:
815 case WLAN_EID_SUPP_RATES:
816 case WLAN_EID_FH_PARAMS:
817 case WLAN_EID_DS_PARAMS:
818 case WLAN_EID_CF_PARAMS:
819 case WLAN_EID_TIM:
820 case WLAN_EID_IBSS_PARAMS:
821 case WLAN_EID_CHALLENGE:
822 case WLAN_EID_RSN:
823 case WLAN_EID_ERP_INFO:
824 case WLAN_EID_EXT_SUPP_RATES:
825 case WLAN_EID_HT_CAPABILITY:
826 case WLAN_EID_HT_OPERATION:
827 case WLAN_EID_VHT_CAPABILITY:
828 case WLAN_EID_VHT_OPERATION:
829 case WLAN_EID_MESH_ID:
830 case WLAN_EID_MESH_CONFIG:
831 case WLAN_EID_PEER_MGMT:
832 case WLAN_EID_PREQ:
833 case WLAN_EID_PREP:
834 case WLAN_EID_PERR:
835 case WLAN_EID_RANN:
836 case WLAN_EID_CHANNEL_SWITCH:
837 case WLAN_EID_EXT_CHANSWITCH_ANN:
838 case WLAN_EID_COUNTRY:
839 case WLAN_EID_PWR_CONSTRAINT:
840 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg85220d72013-03-25 18:29:27 +0100841 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100842 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -0700843 case WLAN_EID_CHAN_SWITCH_PARAM:
Arik Nemtsov9041c1f2014-11-09 18:50:15 +0200844 case WLAN_EID_EXT_CAPABILITY:
Arik Nemtsov538375842014-11-09 18:50:18 +0200845 case WLAN_EID_CHAN_SWITCH_TIMING:
846 case WLAN_EID_LINK_ID:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100847 /*
848 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
849 * that if the content gets bigger it might be needed more than once
850 */
Johannes Berg9690fb12012-10-24 14:19:53 +0200851 if (test_bit(id, seen_elems)) {
852 elems->parse_error = true;
853 left -= elen;
854 pos += elen;
855 continue;
856 }
857 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800858 }
Johannes Bergdd769862011-11-18 16:54:50 +0100859
860 if (calc_crc && id < 64 && (filter & (1ULL << id)))
861 crc = crc32_be(crc, pos - 2, elen + 2);
862
Paul Stewartfcff4f12012-02-23 17:59:53 -0800863 elem_parse_failed = false;
864
Johannes Bergdd769862011-11-18 16:54:50 +0100865 switch (id) {
Arik Nemtsov538375842014-11-09 18:50:18 +0200866 case WLAN_EID_LINK_ID:
867 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
868 elem_parse_failed = true;
869 break;
870 }
871 elems->lnk_id = (void *)(pos - 2);
872 break;
873 case WLAN_EID_CHAN_SWITCH_TIMING:
874 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
875 elem_parse_failed = true;
876 break;
877 }
878 elems->ch_sw_timing = (void *)pos;
879 break;
Arik Nemtsov9041c1f2014-11-09 18:50:15 +0200880 case WLAN_EID_EXT_CAPABILITY:
881 elems->ext_capab = pos;
882 elems->ext_capab_len = elen;
883 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100884 case WLAN_EID_SSID:
885 elems->ssid = pos;
886 elems->ssid_len = elen;
887 break;
888 case WLAN_EID_SUPP_RATES:
889 elems->supp_rates = pos;
890 elems->supp_rates_len = elen;
891 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100892 case WLAN_EID_DS_PARAMS:
Johannes Berg1cd8e882013-03-27 14:30:12 +0100893 if (elen >= 1)
894 elems->ds_params = pos;
895 else
896 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100897 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100898 case WLAN_EID_TIM:
899 if (elen >= sizeof(struct ieee80211_tim_ie)) {
900 elems->tim = (void *)pos;
901 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800902 } else
903 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100904 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100905 case WLAN_EID_CHALLENGE:
906 elems->challenge = pos;
907 elems->challenge_len = elen;
908 break;
909 case WLAN_EID_VENDOR_SPECIFIC:
910 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
911 pos[2] == 0xf2) {
912 /* Microsoft OUI (00:50:F2) */
913
914 if (calc_crc)
915 crc = crc32_be(crc, pos - 2, elen + 2);
916
Johannes Berg441a33b2013-02-12 16:27:04 +0100917 if (elen >= 5 && pos[3] == 2) {
Johannes Bergdd769862011-11-18 16:54:50 +0100918 /* OUI Type 2 - WMM IE */
919 if (pos[4] == 0) {
920 elems->wmm_info = pos;
921 elems->wmm_info_len = elen;
922 } else if (pos[4] == 1) {
923 elems->wmm_param = pos;
924 elems->wmm_param_len = elen;
925 }
926 }
927 }
928 break;
929 case WLAN_EID_RSN:
930 elems->rsn = pos;
931 elems->rsn_len = elen;
932 break;
933 case WLAN_EID_ERP_INFO:
Johannes Berg1946bed2013-03-27 14:31:53 +0100934 if (elen >= 1)
935 elems->erp_info = pos;
936 else
937 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100938 break;
939 case WLAN_EID_EXT_SUPP_RATES:
940 elems->ext_supp_rates = pos;
941 elems->ext_supp_rates_len = elen;
942 break;
943 case WLAN_EID_HT_CAPABILITY:
944 if (elen >= sizeof(struct ieee80211_ht_cap))
945 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800946 else
947 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100948 break;
Johannes Berg074d46d2012-03-15 19:45:16 +0100949 case WLAN_EID_HT_OPERATION:
950 if (elen >= sizeof(struct ieee80211_ht_operation))
951 elems->ht_operation = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800952 else
953 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100954 break;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000955 case WLAN_EID_VHT_CAPABILITY:
956 if (elen >= sizeof(struct ieee80211_vht_cap))
957 elems->vht_cap_elem = (void *)pos;
958 else
959 elem_parse_failed = true;
960 break;
961 case WLAN_EID_VHT_OPERATION:
962 if (elen >= sizeof(struct ieee80211_vht_operation))
963 elems->vht_operation = (void *)pos;
964 else
965 elem_parse_failed = true;
966 break;
Johannes Bergbee7f5862013-02-07 22:24:55 +0100967 case WLAN_EID_OPMODE_NOTIF:
968 if (elen > 0)
969 elems->opmode_notif = pos;
970 else
971 elem_parse_failed = true;
972 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100973 case WLAN_EID_MESH_ID:
974 elems->mesh_id = pos;
975 elems->mesh_id_len = elen;
976 break;
977 case WLAN_EID_MESH_CONFIG:
978 if (elen >= sizeof(struct ieee80211_meshconf_ie))
979 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800980 else
981 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100982 break;
983 case WLAN_EID_PEER_MGMT:
984 elems->peering = pos;
985 elems->peering_len = elen;
986 break;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100987 case WLAN_EID_MESH_AWAKE_WINDOW:
988 if (elen >= 2)
989 elems->awake_window = (void *)pos;
990 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100991 case WLAN_EID_PREQ:
992 elems->preq = pos;
993 elems->preq_len = elen;
994 break;
995 case WLAN_EID_PREP:
996 elems->prep = pos;
997 elems->prep_len = elen;
998 break;
999 case WLAN_EID_PERR:
1000 elems->perr = pos;
1001 elems->perr_len = elen;
1002 break;
1003 case WLAN_EID_RANN:
1004 if (elen >= sizeof(struct ieee80211_rann_ie))
1005 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -08001006 else
1007 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +01001008 break;
1009 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +02001010 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1011 elem_parse_failed = true;
1012 break;
1013 }
1014 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +01001015 break;
Johannes Bergb4f286a12013-03-26 14:13:58 +01001016 case WLAN_EID_EXT_CHANSWITCH_ANN:
1017 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1018 elem_parse_failed = true;
1019 break;
1020 }
1021 elems->ext_chansw_ie = (void *)pos;
1022 break;
Johannes Berg85220d72013-03-25 18:29:27 +01001023 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1024 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1025 elem_parse_failed = true;
1026 break;
1027 }
1028 elems->sec_chan_offs = (void *)pos;
1029 break;
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -07001030 case WLAN_EID_CHAN_SWITCH_PARAM:
1031 if (elen !=
1032 sizeof(*elems->mesh_chansw_params_ie)) {
1033 elem_parse_failed = true;
1034 break;
1035 }
1036 elems->mesh_chansw_params_ie = (void *)pos;
1037 break;
Johannes Bergb2e506b2013-03-26 14:54:16 +01001038 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1039 if (!action ||
1040 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1041 elem_parse_failed = true;
1042 break;
1043 }
1044 elems->wide_bw_chansw_ie = (void *)pos;
1045 break;
1046 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1047 if (action) {
1048 elem_parse_failed = true;
1049 break;
1050 }
1051 /*
1052 * This is a bit tricky, but as we only care about
1053 * the wide bandwidth channel switch element, so
1054 * just parse it out manually.
1055 */
1056 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1057 pos, elen);
1058 if (ie) {
1059 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1060 elems->wide_bw_chansw_ie =
1061 (void *)(ie + 2);
1062 else
1063 elem_parse_failed = true;
1064 }
1065 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001066 case WLAN_EID_COUNTRY:
1067 elems->country_elem = pos;
1068 elems->country_elem_len = elen;
1069 break;
1070 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +02001071 if (elen != 1) {
1072 elem_parse_failed = true;
1073 break;
1074 }
Johannes Bergdd769862011-11-18 16:54:50 +01001075 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +01001076 break;
Steinar H. Gundersonc8d65912014-09-03 06:48:37 -07001077 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1078 /* Lots of different options exist, but we only care
1079 * about the Dynamic Transmit Power Control element.
1080 * First check for the Cisco OUI, then for the DTPC
1081 * tag (0x00).
1082 */
1083 if (elen < 4) {
1084 elem_parse_failed = true;
1085 break;
1086 }
1087
1088 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1089 pos[2] != 0x96 || pos[3] != 0x00)
1090 break;
1091
1092 if (elen != 6) {
1093 elem_parse_failed = true;
1094 break;
1095 }
1096
1097 if (calc_crc)
1098 crc = crc32_be(crc, pos - 2, elen + 2);
1099
1100 elems->cisco_dtpc_elem = pos;
1101 break;
Johannes Bergdd769862011-11-18 16:54:50 +01001102 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg79ba1d82013-03-27 14:38:07 +01001103 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1104 elems->timeout_int = (void *)pos;
1105 else
1106 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +01001107 break;
1108 default:
1109 break;
1110 }
1111
Paul Stewartfcff4f12012-02-23 17:59:53 -08001112 if (elem_parse_failed)
1113 elems->parse_error = true;
1114 else
Johannes Berg5df45692012-10-24 14:22:37 +02001115 __set_bit(id, seen_elems);
Paul Stewartfcff4f12012-02-23 17:59:53 -08001116
Johannes Bergdd769862011-11-18 16:54:50 +01001117 left -= elen;
1118 pos += elen;
1119 }
1120
Paul Stewartfcff4f12012-02-23 17:59:53 -08001121 if (left != 0)
1122 elems->parse_error = true;
1123
Johannes Bergdd769862011-11-18 16:54:50 +01001124 return crc;
1125}
1126
Johannes Berg3abead52012-03-02 15:56:59 +01001127void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1128 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +02001129{
1130 struct ieee80211_local *local = sdata->local;
1131 struct ieee80211_tx_queue_params qparam;
Johannes Berg55de9082012-07-26 17:24:39 +02001132 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg54bcbc62012-03-28 11:04:25 +02001133 int ac;
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001134 bool use_11b, enable_qos;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001135 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
Johannes Bergaa837e12009-05-07 16:16:24 +02001136 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +02001137
1138 if (!local->ops->conf_tx)
1139 return;
1140
Johannes Berg54bcbc62012-03-28 11:04:25 +02001141 if (local->hw.queues < IEEE80211_NUM_ACS)
1142 return;
1143
Johannes Berg5825fe102008-09-09 12:56:01 +02001144 memset(&qparam, 0, sizeof(qparam));
1145
Johannes Berg55de9082012-07-26 17:24:39 +02001146 rcu_read_lock();
1147 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1148 use_11b = (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +01001149 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +02001150 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg55de9082012-07-26 17:24:39 +02001151 rcu_read_unlock();
Johannes Berg5825fe102008-09-09 12:56:01 +02001152
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001153 /*
1154 * By default disable QoS in STA mode for old access points, which do
1155 * not support 802.11e. New APs will provide proper queue parameters,
1156 * that we will configure later.
1157 */
1158 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1159
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001160 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1161
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001162 /* Set defaults according to 802.11-2007 Table 7-37 */
1163 aCWmax = 1023;
1164 if (use_11b)
1165 aCWmin = 31;
1166 else
1167 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +02001168
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001169 /* Confiure old 802.11b/g medium access rules. */
1170 qparam.cw_max = aCWmax;
1171 qparam.cw_min = aCWmin;
1172 qparam.txop = 0;
1173 qparam.aifs = 2;
1174
1175 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1176 /* Update if QoS is enabled. */
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001177 if (enable_qos) {
1178 switch (ac) {
1179 case IEEE80211_AC_BK:
1180 qparam.cw_max = aCWmax;
1181 qparam.cw_min = aCWmin;
1182 qparam.txop = 0;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001183 if (is_ocb)
1184 qparam.aifs = 9;
1185 else
1186 qparam.aifs = 7;
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001187 break;
1188 /* never happens but let's not leave undefined */
1189 default:
1190 case IEEE80211_AC_BE:
1191 qparam.cw_max = aCWmax;
1192 qparam.cw_min = aCWmin;
1193 qparam.txop = 0;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001194 if (is_ocb)
1195 qparam.aifs = 6;
1196 else
1197 qparam.aifs = 3;
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001198 break;
1199 case IEEE80211_AC_VI:
1200 qparam.cw_max = aCWmin;
1201 qparam.cw_min = (aCWmin + 1) / 2 - 1;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001202 if (is_ocb)
1203 qparam.txop = 0;
1204 else if (use_11b)
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001205 qparam.txop = 6016/32;
1206 else
1207 qparam.txop = 3008/32;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001208
1209 if (is_ocb)
1210 qparam.aifs = 3;
1211 else
1212 qparam.aifs = 2;
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001213 break;
1214 case IEEE80211_AC_VO:
1215 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1216 qparam.cw_min = (aCWmin + 1) / 4 - 1;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001217 if (is_ocb)
1218 qparam.txop = 0;
1219 else if (use_11b)
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001220 qparam.txop = 3264/32;
1221 else
1222 qparam.txop = 1504/32;
1223 qparam.aifs = 2;
1224 break;
1225 }
Johannes Bergaa837e12009-05-07 16:16:24 +02001226 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001227
Kalle Valoab133152010-01-12 10:42:31 +02001228 qparam.uapsd = false;
1229
Johannes Berg54bcbc62012-03-28 11:04:25 +02001230 sdata->tx_conf[ac] = qparam;
1231 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +02001232 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001233
Johannes Bergf142c6b2012-06-18 20:07:15 +02001234 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1235 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce85442012-05-30 10:56:46 +02001236 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +01001237 if (bss_notify)
1238 ieee80211_bss_info_change_notify(sdata,
1239 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +05301240 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001241}
Johannes Berge50db652008-09-09 15:07:09 +02001242
Johannes Berg46900292009-02-15 12:44:28 +01001243void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001244 u16 transaction, u16 auth_alg, u16 status,
Johannes Berg4a3cb702013-02-12 16:43:19 +01001245 const u8 *extra, size_t extra_len, const u8 *da,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001246 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1247 u32 tx_flags)
Johannes Berg46900292009-02-15 12:44:28 +01001248{
1249 struct ieee80211_local *local = sdata->local;
1250 struct sk_buff *skb;
1251 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +02001252 int err;
Johannes Berg46900292009-02-15 12:44:28 +01001253
Fred Zhou15e230a2013-09-24 10:33:01 +08001254 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
Max Stepanov744462a2014-06-10 20:00:08 +03001255 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1256 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
Joe Perchesd15b8452011-08-29 14:17:31 -07001257 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +01001258 return;
Joe Perchesd15b8452011-08-29 14:17:31 -07001259
Max Stepanov744462a2014-06-10 20:00:08 +03001260 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
Johannes Berg46900292009-02-15 12:44:28 +01001261
1262 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1263 memset(mgmt, 0, 24 + 6);
1264 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1265 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001266 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001267 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001268 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1269 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1270 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001271 mgmt->u.auth.status_code = cpu_to_le16(status);
Johannes Berg46900292009-02-15 12:44:28 +01001272 if (extra)
1273 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +01001274
Johannes Bergfffd0932009-07-08 14:22:54 +02001275 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1276 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1277 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1278 WARN_ON(err);
1279 }
1280
Johannes Berg1672c0e32013-01-29 15:02:27 +01001281 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1282 tx_flags;
Johannes Berg62ae67b2009-11-18 18:42:05 +01001283 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001284}
1285
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001286void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1287 const u8 *bssid, u16 stype, u16 reason,
1288 bool send_frame, u8 *frame_buf)
1289{
1290 struct ieee80211_local *local = sdata->local;
1291 struct sk_buff *skb;
1292 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1293
1294 /* build frame */
1295 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1296 mgmt->duration = 0; /* initialize only */
1297 mgmt->seq_ctrl = 0; /* initialize only */
1298 memcpy(mgmt->da, bssid, ETH_ALEN);
1299 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1300 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1301 /* u.deauth.reason_code == u.disassoc.reason_code */
1302 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1303
1304 if (send_frame) {
1305 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1306 IEEE80211_DEAUTH_FRAME_LEN);
1307 if (!skb)
1308 return;
1309
1310 skb_reserve(skb, local->hw.extra_tx_headroom);
1311
1312 /* copy in frame */
1313 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1314 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1315
1316 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1317 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1318 IEEE80211_SKB_CB(skb)->flags |=
1319 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1320
1321 ieee80211_tx_skb(sdata, skb);
1322 }
1323}
1324
David Spinadelc56ef672014-02-05 15:21:13 +02001325static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1326 u8 *buffer, size_t buffer_len,
1327 const u8 *ie, size_t ie_len,
1328 enum ieee80211_band band,
1329 u32 rate_mask,
1330 struct cfg80211_chan_def *chandef,
1331 size_t *offset)
Johannes Bergde95a542009-04-01 11:58:36 +02001332{
1333 struct ieee80211_supported_band *sband;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001334 u8 *pos = buffer, *end = buffer + buffer_len;
David Spinadelc56ef672014-02-05 15:21:13 +02001335 size_t noffset;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001336 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001337 u8 rates[32];
1338 int num_rates;
1339 int ext_rates_len;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001340 int shift;
1341 u32 rate_flags;
Johannes Bergde95a542009-04-01 11:58:36 +02001342
David Spinadelc56ef672014-02-05 15:21:13 +02001343 *offset = 0;
1344
Johannes Berg4d36ec52009-10-27 20:59:55 +01001345 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001346 if (WARN_ON_ONCE(!sband))
1347 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001348
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001349 rate_flags = ieee80211_chandef_rate_flags(chandef);
1350 shift = ieee80211_chandef_get_shift(chandef);
1351
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001352 num_rates = 0;
1353 for (i = 0; i < sband->n_bitrates; i++) {
1354 if ((BIT(i) & rate_mask) == 0)
1355 continue; /* skip rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001356 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1357 continue;
1358
1359 rates[num_rates++] =
1360 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1361 (1 << shift) * 5);
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001362 }
1363
1364 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001365
Johannes Bergc604b9f2012-11-29 12:45:18 +01001366 if (end - pos < 2 + supp_rates_len)
1367 goto out_err;
Johannes Bergde95a542009-04-01 11:58:36 +02001368 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001369 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001370 memcpy(pos, rates, supp_rates_len);
1371 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001372
Johannes Berg8e664fb2009-12-23 13:15:38 +01001373 /* insert "request information" if in custom IEs */
1374 if (ie && ie_len) {
1375 static const u8 before_extrates[] = {
1376 WLAN_EID_SSID,
1377 WLAN_EID_SUPP_RATES,
1378 WLAN_EID_REQUEST,
1379 };
1380 noffset = ieee80211_ie_split(ie, ie_len,
1381 before_extrates,
1382 ARRAY_SIZE(before_extrates),
David Spinadelc56ef672014-02-05 15:21:13 +02001383 *offset);
1384 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001385 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001386 memcpy(pos, ie + *offset, noffset - *offset);
1387 pos += noffset - *offset;
1388 *offset = noffset;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001389 }
Johannes Bergde95a542009-04-01 11:58:36 +02001390
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001391 ext_rates_len = num_rates - supp_rates_len;
1392 if (ext_rates_len > 0) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001393 if (end - pos < 2 + ext_rates_len)
1394 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001395 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001396 *pos++ = ext_rates_len;
1397 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1398 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001399 }
1400
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001401 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001402 if (end - pos < 3)
1403 goto out_err;
Jouni Malinen651b5222010-08-28 19:37:51 +03001404 *pos++ = WLAN_EID_DS_PARAMS;
1405 *pos++ = 1;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001406 *pos++ = ieee80211_frequency_to_channel(
1407 chandef->chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001408 }
1409
Johannes Berg8e664fb2009-12-23 13:15:38 +01001410 /* insert custom IEs that go before HT */
1411 if (ie && ie_len) {
1412 static const u8 before_ht[] = {
1413 WLAN_EID_SSID,
1414 WLAN_EID_SUPP_RATES,
1415 WLAN_EID_REQUEST,
1416 WLAN_EID_EXT_SUPP_RATES,
1417 WLAN_EID_DS_PARAMS,
1418 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1419 };
1420 noffset = ieee80211_ie_split(ie, ie_len,
1421 before_ht, ARRAY_SIZE(before_ht),
David Spinadelc56ef672014-02-05 15:21:13 +02001422 *offset);
1423 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001424 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001425 memcpy(pos, ie + *offset, noffset - *offset);
1426 pos += noffset - *offset;
1427 *offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001428 }
1429
Johannes Bergc604b9f2012-11-29 12:45:18 +01001430 if (sband->ht_cap.ht_supported) {
1431 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1432 goto out_err;
Ben Greearef96a8422011-11-18 11:32:00 -08001433 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1434 sband->ht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001435 }
Johannes Berg5ef2d412009-03-31 12:12:07 +02001436
Johannes Bergde95a542009-04-01 11:58:36 +02001437 /*
1438 * If adding more here, adjust code in main.c
1439 * that calculates local->scan_ies_len.
1440 */
1441
Johannes Berg4d952302014-02-04 09:48:34 +01001442 /* insert custom IEs that go before VHT */
Johannes Berg8e664fb2009-12-23 13:15:38 +01001443 if (ie && ie_len) {
Johannes Berg4d952302014-02-04 09:48:34 +01001444 static const u8 before_vht[] = {
1445 WLAN_EID_SSID,
1446 WLAN_EID_SUPP_RATES,
1447 WLAN_EID_REQUEST,
1448 WLAN_EID_EXT_SUPP_RATES,
1449 WLAN_EID_DS_PARAMS,
1450 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1451 WLAN_EID_HT_CAPABILITY,
1452 WLAN_EID_BSS_COEX_2040,
1453 WLAN_EID_EXT_CAPABILITY,
1454 WLAN_EID_SSID_LIST,
1455 WLAN_EID_CHANNEL_USAGE,
1456 WLAN_EID_INTERWORKING,
1457 /* mesh ID can't happen here */
1458 /* 60 GHz can't happen here right now */
1459 };
1460 noffset = ieee80211_ie_split(ie, ie_len,
1461 before_vht, ARRAY_SIZE(before_vht),
David Spinadelc56ef672014-02-05 15:21:13 +02001462 *offset);
1463 if (end - pos < noffset - *offset)
Johannes Bergc604b9f2012-11-29 12:45:18 +01001464 goto out_err;
David Spinadelc56ef672014-02-05 15:21:13 +02001465 memcpy(pos, ie + *offset, noffset - *offset);
1466 pos += noffset - *offset;
1467 *offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001468 }
1469
Johannes Bergc604b9f2012-11-29 12:45:18 +01001470 if (sband->vht_cap.vht_supported) {
1471 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1472 goto out_err;
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00001473 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1474 sband->vht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001475 }
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00001476
Johannes Bergde95a542009-04-01 11:58:36 +02001477 return pos - buffer;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001478 out_err:
1479 WARN_ONCE(1, "not enough space for preq IEs\n");
1480 return pos - buffer;
Johannes Bergde95a542009-04-01 11:58:36 +02001481}
1482
David Spinadelc56ef672014-02-05 15:21:13 +02001483int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1484 size_t buffer_len,
1485 struct ieee80211_scan_ies *ie_desc,
1486 const u8 *ie, size_t ie_len,
1487 u8 bands_used, u32 *rate_masks,
1488 struct cfg80211_chan_def *chandef)
1489{
1490 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1491 int i;
1492
1493 memset(ie_desc, 0, sizeof(*ie_desc));
1494
1495 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1496 if (bands_used & BIT(i)) {
1497 pos += ieee80211_build_preq_ies_band(local,
1498 buffer + pos,
1499 buffer_len - pos,
1500 ie, ie_len, i,
1501 rate_masks[i],
1502 chandef,
1503 &custom_ie_offset);
1504 ie_desc->ies[i] = buffer + old_pos;
1505 ie_desc->len[i] = pos - old_pos;
1506 old_pos = pos;
1507 }
1508 }
1509
1510 /* add any remaining custom IEs */
1511 if (ie && ie_len) {
1512 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1513 "not enough space for preq custom IEs\n"))
1514 return pos;
1515 memcpy(buffer + pos, ie + custom_ie_offset,
1516 ie_len - custom_ie_offset);
1517 ie_desc->common_ies = buffer + pos;
1518 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1519 pos += ie_len - custom_ie_offset;
1520 }
1521
1522 return pos;
1523};
1524
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001525struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001526 u8 *dst, u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001527 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001528 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001529 const u8 *ie, size_t ie_len,
1530 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001531{
1532 struct ieee80211_local *local = sdata->local;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001533 struct cfg80211_chan_def chandef;
Johannes Berg46900292009-02-15 12:44:28 +01001534 struct sk_buff *skb;
1535 struct ieee80211_mgmt *mgmt;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001536 int ies_len;
David Spinadelc56ef672014-02-05 15:21:13 +02001537 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1538 struct ieee80211_scan_ies dummy_ie_desc;
Johannes Berg46900292009-02-15 12:44:28 +01001539
Paul Stewarta806c552011-06-23 09:00:11 -08001540 /*
1541 * Do not send DS Channel parameter for directed probe requests
1542 * in order to maximize the chance that we get a response. Some
1543 * badly-behaved APs don't respond when this parameter is included.
1544 */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001545 chandef.width = sdata->vif.bss_conf.chandef.width;
Paul Stewarta806c552011-06-23 09:00:11 -08001546 if (directed)
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001547 chandef.chan = NULL;
Paul Stewarta806c552011-06-23 09:00:11 -08001548 else
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001549 chandef.chan = chan;
Jouni Malinen651b5222010-08-28 19:37:51 +03001550
Kalle Valo7c12ce82010-01-05 20:16:44 +02001551 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001552 ssid, ssid_len, 100 + ie_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001553 if (!skb)
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001554 return NULL;
1555
David Spinadelc56ef672014-02-05 15:21:13 +02001556 rate_masks[chan->band] = ratemask;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001557 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
David Spinadelc56ef672014-02-05 15:21:13 +02001558 skb_tailroom(skb), &dummy_ie_desc,
1559 ie, ie_len, BIT(chan->band),
1560 rate_masks, &chandef);
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001561 skb_put(skb, ies_len);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001562
Johannes Berg46900292009-02-15 12:44:28 +01001563 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001564 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001565 memcpy(mgmt->da, dst, ETH_ALEN);
1566 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001567 }
Johannes Berg46900292009-02-15 12:44:28 +01001568
Johannes Berg62ae67b2009-11-18 18:42:05 +01001569 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001570
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001571 return skb;
1572}
1573
1574void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1575 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001576 const u8 *ie, size_t ie_len,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001577 u32 ratemask, bool directed, u32 tx_flags,
Johannes Berg55de9082012-07-26 17:24:39 +02001578 struct ieee80211_channel *channel, bool scan)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001579{
1580 struct sk_buff *skb;
1581
Johannes Bergfe94fe02012-07-30 12:26:34 +02001582 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001583 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001584 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301585 if (skb) {
Johannes Berg1672c0e32013-01-29 15:02:27 +01001586 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
Johannes Berg55de9082012-07-26 17:24:39 +02001587 if (scan)
1588 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1589 else
1590 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301591 }
Johannes Berg46900292009-02-15 12:44:28 +01001592}
1593
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001594u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
Johannes Berg46900292009-02-15 12:44:28 +01001595 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001596 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001597{
1598 struct ieee80211_supported_band *sband;
Johannes Berg46900292009-02-15 12:44:28 +01001599 size_t num_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001600 u32 supp_rates, rate_flags;
1601 int i, j, shift;
1602 sband = sdata->local->hw.wiphy->bands[band];
1603
1604 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1605 shift = ieee80211_vif_get_shift(&sdata->vif);
Johannes Berg46900292009-02-15 12:44:28 +01001606
Michal Kazior4ee73f32012-04-11 08:47:56 +02001607 if (WARN_ON(!sband))
1608 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001609
Johannes Berg46900292009-02-15 12:44:28 +01001610 num_rates = sband->n_bitrates;
1611 supp_rates = 0;
1612 for (i = 0; i < elems->supp_rates_len +
1613 elems->ext_supp_rates_len; i++) {
1614 u8 rate = 0;
1615 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001616 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001617 if (i < elems->supp_rates_len)
1618 rate = elems->supp_rates[i];
1619 else if (elems->ext_supp_rates)
1620 rate = elems->ext_supp_rates
1621 [i - elems->supp_rates_len];
1622 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001623 is_basic = !!(rate & 0x80);
1624
1625 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1626 continue;
1627
1628 for (j = 0; j < num_rates; j++) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001629 int brate;
1630 if ((rate_flags & sband->bitrates[j].flags)
1631 != rate_flags)
1632 continue;
1633
1634 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1635 1 << shift);
1636
1637 if (brate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001638 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001639 if (basic_rates && is_basic)
1640 *basic_rates |= BIT(j);
1641 }
1642 }
Johannes Berg46900292009-02-15 12:44:28 +01001643 }
1644 return supp_rates;
1645}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001646
Johannes Berg84f6a012009-08-20 20:02:20 +02001647void ieee80211_stop_device(struct ieee80211_local *local)
1648{
1649 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001650 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001651
1652 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001653
1654 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001655 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001656}
1657
Johannes Bergf6837ba82014-04-30 14:19:04 +02001658static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1659{
1660 struct ieee80211_sub_if_data *sdata;
1661 struct ieee80211_chanctx *ctx;
1662
1663 /*
1664 * We get here if during resume the device can't be restarted properly.
1665 * We might also get here if this happens during HW reset, which is a
1666 * slightly different situation and we need to drop all connections in
1667 * the latter case.
1668 *
1669 * Ask cfg80211 to turn off all interfaces, this will result in more
1670 * warnings but at least we'll then get into a clean stopped state.
1671 */
1672
1673 local->resuming = false;
1674 local->suspended = false;
1675 local->started = false;
1676
1677 /* scheduled scan clearly can't be running any more, but tell
1678 * cfg80211 and clear local state
1679 */
1680 ieee80211_sched_scan_end(local);
1681
1682 list_for_each_entry(sdata, &local->interfaces, list)
1683 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1684
1685 /* Mark channel contexts as not being in the driver any more to avoid
1686 * removing them from the driver during the shutdown process...
1687 */
1688 mutex_lock(&local->chanctx_mtx);
1689 list_for_each_entry(ctx, &local->chanctx_list, list)
1690 ctx->driver_present = false;
1691 mutex_unlock(&local->chanctx_mtx);
1692
1693 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1694}
1695
Stanislaw Gruszka153a5fc42013-02-28 10:55:30 +01001696static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1697 struct ieee80211_sub_if_data *sdata)
1698{
1699 struct ieee80211_chanctx_conf *conf;
1700 struct ieee80211_chanctx *ctx;
1701
1702 if (!local->use_chanctx)
1703 return;
1704
1705 mutex_lock(&local->chanctx_mtx);
1706 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1707 lockdep_is_held(&local->chanctx_mtx));
1708 if (conf) {
1709 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1710 drv_assign_vif_chanctx(local, sdata, ctx);
1711 }
1712 mutex_unlock(&local->chanctx_mtx);
1713}
1714
Johannes Bergf2753dd2009-04-14 10:09:24 +02001715int ieee80211_reconfig(struct ieee80211_local *local)
1716{
1717 struct ieee80211_hw *hw = &local->hw;
1718 struct ieee80211_sub_if_data *sdata;
Johannes Berg55de9082012-07-26 17:24:39 +02001719 struct ieee80211_chanctx *ctx;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001720 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001721 int res, i;
Johannes Bergd8881302013-01-10 23:55:33 +01001722 bool reconfig_due_to_wowlan = false;
David Spinadeld43c6b62013-12-08 21:48:57 +02001723 struct ieee80211_sub_if_data *sched_scan_sdata;
1724 bool sched_scan_stopped = false;
Johannes Bergd8881302013-01-10 23:55:33 +01001725
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001726#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001727 if (local->suspended)
1728 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001729
Johannes Bergeecc4802011-05-04 15:37:29 +02001730 if (local->wowlan) {
Johannes Bergeecc4802011-05-04 15:37:29 +02001731 res = drv_resume(local);
Johannes Berg27b3eb92013-08-07 20:11:55 +02001732 local->wowlan = false;
Johannes Bergeecc4802011-05-04 15:37:29 +02001733 if (res < 0) {
1734 local->resuming = false;
1735 return res;
1736 }
1737 if (res == 0)
1738 goto wake_up;
1739 WARN_ON(res > 1);
1740 /*
1741 * res is 1, which means the driver requested
1742 * to go through a regular reset on wakeup.
1743 */
Johannes Bergd8881302013-01-10 23:55:33 +01001744 reconfig_due_to_wowlan = true;
Johannes Bergeecc4802011-05-04 15:37:29 +02001745 }
1746#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001747 /* everything else happens only if HW was up & running */
1748 if (!local->open_count)
1749 goto wake_up;
1750
1751 /*
1752 * Upon resume hardware can sometimes be goofy due to
1753 * various platform / driver / bus issues, so restarting
1754 * the device may at times not work immediately. Propagate
1755 * the error.
1756 */
1757 res = drv_start(local);
1758 if (res) {
Johannes Bergf6837ba82014-04-30 14:19:04 +02001759 if (local->suspended)
1760 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1761 else
1762 WARN(1, "Hardware became unavailable during restart.\n");
1763 ieee80211_handle_reconfig_failure(local);
Johannes Berg94f9b972011-07-14 16:48:54 +02001764 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001765 }
1766
Yogesh Ashok Powar7f2819752011-12-30 16:34:25 +05301767 /* setup fragmentation threshold */
1768 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1769
1770 /* setup RTS threshold */
1771 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1772
1773 /* reset coverage class */
1774 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1775
Johannes Berg94f9b972011-07-14 16:48:54 +02001776 ieee80211_led_radio(local, true);
1777 ieee80211_mod_tpt_led_trig(local,
1778 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1779
Johannes Bergf2753dd2009-04-14 10:09:24 +02001780 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001781 sdata = rtnl_dereference(local->monitor_sdata);
1782 if (sdata) {
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001783 /* in HW restart it exists already */
1784 WARN_ON(local->resuming);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001785 res = drv_add_interface(local, sdata);
1786 if (WARN_ON(res)) {
Monam Agarwal0c2bef462014-03-24 00:51:43 +05301787 RCU_INIT_POINTER(local->monitor_sdata, NULL);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001788 synchronize_net();
1789 kfree(sdata);
1790 }
1791 }
1792
Johannes Bergf2753dd2009-04-14 10:09:24 +02001793 list_for_each_entry(sdata, &local->interfaces, list) {
1794 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1795 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001796 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001797 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001798 }
1799
Johannes Berg55de9082012-07-26 17:24:39 +02001800 /* add channel contexts */
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001801 if (local->use_chanctx) {
1802 mutex_lock(&local->chanctx_mtx);
1803 list_for_each_entry(ctx, &local->chanctx_list, list)
Michal Kazior5bcae312014-06-25 12:35:06 +02001804 if (ctx->replace_state !=
1805 IEEE80211_CHANCTX_REPLACES_OTHER)
1806 WARN_ON(drv_add_chanctx(local, ctx));
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001807 mutex_unlock(&local->chanctx_mtx);
Johannes Berg55de9082012-07-26 17:24:39 +02001808
Zhao, Gang7df180f2014-04-26 09:43:40 +08001809 list_for_each_entry(sdata, &local->interfaces, list) {
1810 if (!ieee80211_sdata_running(sdata))
1811 continue;
1812 ieee80211_assign_chanctx(local, sdata);
1813 }
Johannes Berg6352c872012-11-07 12:40:41 +01001814
Zhao, Gang7df180f2014-04-26 09:43:40 +08001815 sdata = rtnl_dereference(local->monitor_sdata);
1816 if (sdata && ieee80211_sdata_running(sdata))
1817 ieee80211_assign_chanctx(local, sdata);
1818 }
Johannes Bergfe5f2552012-11-19 22:19:08 +01001819
Johannes Bergf2753dd2009-04-14 10:09:24 +02001820 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001821 mutex_lock(&local->sta_mtx);
1822 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001823 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001824
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001825 if (!sta->uploaded)
1826 continue;
1827
1828 /* AP-mode stations will be added later */
1829 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1830 continue;
1831
1832 for (state = IEEE80211_STA_NOTEXIST;
1833 state < sta->sta_state; state++)
1834 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1835 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001836 }
Johannes Berg34e89502010-02-03 13:59:58 +01001837 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001838
Eliad Peller2683d652011-07-14 20:29:42 +03001839 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001840 if (hw->queues >= IEEE80211_NUM_ACS) {
1841 list_for_each_entry(sdata, &local->interfaces, list) {
1842 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1843 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1844 !ieee80211_sdata_running(sdata))
1845 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001846
Johannes Berg54bcbc62012-03-28 11:04:25 +02001847 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1848 drv_conf_tx(local, sdata, i,
1849 &sdata->tx_conf[i]);
1850 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001851 }
Eliad Peller2683d652011-07-14 20:29:42 +03001852
Johannes Bergf2753dd2009-04-14 10:09:24 +02001853 /* reconfigure hardware */
1854 ieee80211_hw_config(local, ~0);
1855
Johannes Bergf2753dd2009-04-14 10:09:24 +02001856 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001857
1858 /* Finally also reconfigure all the BSS information */
1859 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001860 u32 changed;
1861
Johannes Berg9607e6b662009-12-23 13:15:31 +01001862 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001863 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001864
1865 /* common change flags for all interface types */
1866 changed = BSS_CHANGED_ERP_CTS_PROT |
1867 BSS_CHANGED_ERP_PREAMBLE |
1868 BSS_CHANGED_ERP_SLOT |
1869 BSS_CHANGED_HT |
1870 BSS_CHANGED_BASIC_RATES |
1871 BSS_CHANGED_BEACON_INT |
1872 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001873 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001874 BSS_CHANGED_QOS |
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001875 BSS_CHANGED_IDLE |
1876 BSS_CHANGED_TXPOWER;
Johannes Bergac8dd502010-05-05 09:44:02 +02001877
Johannes Bergf2753dd2009-04-14 10:09:24 +02001878 switch (sdata->vif.type) {
1879 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001880 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001881 BSS_CHANGED_ARP_FILTER |
1882 BSS_CHANGED_PS;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001883
Alexander Bondar989c6502013-05-16 17:34:17 +03001884 /* Re-send beacon info report to the driver */
1885 if (sdata->u.mgd.have_beacon)
1886 changed |= BSS_CHANGED_BEACON_INFO;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001887
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001888 sdata_lock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001889 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001890 sdata_unlock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001891 break;
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001892 case NL80211_IFTYPE_OCB:
Rostislav Lisovy239281f2014-11-03 10:33:19 +01001893 changed |= BSS_CHANGED_OCB;
1894 ieee80211_bss_info_change_notify(sdata, changed);
Rostislav Lisovy6e0bd6c2014-11-03 10:33:18 +01001895 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001896 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001897 changed |= BSS_CHANGED_IBSS;
1898 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001899 case NL80211_IFTYPE_AP:
Johannes Berg339afbf2012-11-14 15:21:17 +01001900 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001901
Johannes Berg10416382012-10-19 15:44:42 +02001902 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001903 changed |= BSS_CHANGED_AP_PROBE_RESP;
1904
Johannes Berg10416382012-10-19 15:44:42 +02001905 if (rcu_access_pointer(sdata->u.ap.beacon))
1906 drv_start_ap(local, sdata);
1907 }
1908
Arik Nemtsov78274932011-09-04 11:11:32 +03001909 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001910 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg8da34932012-12-14 14:17:26 +01001911 if (sdata->vif.bss_conf.enable_beacon) {
1912 changed |= BSS_CHANGED_BEACON |
1913 BSS_CHANGED_BEACON_ENABLED;
1914 ieee80211_bss_info_change_notify(sdata, changed);
1915 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001916 break;
1917 case NL80211_IFTYPE_WDS:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001918 case NL80211_IFTYPE_AP_VLAN:
1919 case NL80211_IFTYPE_MONITOR:
Johannes Berg98104fde2012-06-16 00:19:54 +02001920 case NL80211_IFTYPE_P2P_DEVICE:
Zhao, Gangb2057862014-04-26 09:43:41 +08001921 /* nothing to do */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001922 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001923 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f782010-08-12 15:38:38 +02001924 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001925 case NL80211_IFTYPE_P2P_CLIENT:
1926 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001927 WARN_ON(1);
1928 break;
1929 }
1930 }
1931
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001932 ieee80211_recalc_ps(local, -1);
1933
Johannes Berg2a419052010-06-10 10:21:29 +02001934 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001935 * The sta might be in psm against the ap (e.g. because
1936 * this was the state before a hw restart), so we
1937 * explicitly send a null packet in order to make sure
1938 * it'll sync against the ap (and get out of psm).
1939 */
1940 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1941 list_for_each_entry(sdata, &local->interfaces, list) {
1942 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1943 continue;
Johannes Berg20f544e2012-11-08 14:06:28 +01001944 if (!sdata->u.mgd.associated)
1945 continue;
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001946
1947 ieee80211_send_nullfunc(local, sdata, 0);
1948 }
1949 }
1950
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001951 /* APs are now beaconing, add back stations */
1952 mutex_lock(&local->sta_mtx);
1953 list_for_each_entry(sta, &local->sta_list, list) {
1954 enum ieee80211_sta_state state;
1955
1956 if (!sta->uploaded)
1957 continue;
1958
1959 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1960 continue;
1961
1962 for (state = IEEE80211_STA_NOTEXIST;
1963 state < sta->sta_state; state++)
1964 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1965 state + 1));
1966 }
1967 mutex_unlock(&local->sta_mtx);
1968
Eyal Shapira7b21aea2012-05-29 02:00:22 -07001969 /* add back keys */
1970 list_for_each_entry(sdata, &local->interfaces, list)
1971 if (ieee80211_sdata_running(sdata))
1972 ieee80211_enable_keys(sdata);
1973
Eliad Pellerc6209482012-07-02 15:08:25 +03001974 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03001975 local->in_reconfig = false;
1976 barrier();
1977
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001978 if (local->monitors == local->open_count && local->monitors > 0)
1979 ieee80211_add_virtual_monitor(local);
1980
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001981 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001982 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1983 * sessions can be established after a resume.
1984 *
1985 * Also tear down aggregation sessions since reconfiguring
1986 * them in a hardware restart scenario is not easily done
1987 * right now, and the hardware will have lost information
1988 * about the sessions, but we and the AP still think they
1989 * are active. This is really a workaround though.
1990 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001991 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001992 mutex_lock(&local->sta_mtx);
1993
1994 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergc82c4a82012-07-18 13:31:31 +02001995 ieee80211_sta_tear_down_BA_sessions(
1996 sta, AGG_STOP_LOCAL_REQUEST);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001997 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001998 }
Johannes Berg2a419052010-06-10 10:21:29 +02001999
2000 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08002001 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08002002
Johannes Berg445ea4e2013-02-13 12:25:28 +01002003 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +03002004 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2005 false);
Johannes Bergf2753dd2009-04-14 10:09:24 +02002006
Johannes Berg5bb644a2009-05-17 11:40:42 +02002007 /*
Arik Nemtsov32769812014-02-11 12:27:19 +02002008 * Reconfigure sched scan if it was interrupted by FW restart or
2009 * suspend.
2010 */
2011 mutex_lock(&local->mtx);
2012 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2013 lockdep_is_held(&local->mtx));
2014 if (sched_scan_sdata && local->sched_scan_req)
2015 /*
2016 * Sched scan stopped, but we don't want to report it. Instead,
2017 * we're trying to reschedule.
2018 */
2019 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2020 local->sched_scan_req))
2021 sched_scan_stopped = true;
2022 mutex_unlock(&local->mtx);
2023
2024 if (sched_scan_stopped)
Eliad Pellere669ba22014-04-30 16:14:24 +03002025 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
Arik Nemtsov32769812014-02-11 12:27:19 +02002026
2027 /*
Johannes Berg5bb644a2009-05-17 11:40:42 +02002028 * If this is for hw restart things are still running.
2029 * We may want to change that later, however.
2030 */
Johannes Berg8f21b0a2013-01-11 00:28:01 +01002031 if (!local->suspended || reconfig_due_to_wowlan)
Eliad Pellercf2c92d2014-11-04 11:43:54 +02002032 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
Johannes Berg8f21b0a2013-01-11 00:28:01 +01002033
2034 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02002035 return 0;
2036
2037#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01002038 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02002039 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01002040 mb();
2041 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02002042
Eliad Pellercf2c92d2014-11-04 11:43:54 +02002043 if (!reconfig_due_to_wowlan)
2044 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2045
Johannes Bergb8360ab2013-04-29 14:57:44 +02002046 list_for_each_entry(sdata, &local->interfaces, list) {
2047 if (!ieee80211_sdata_running(sdata))
2048 continue;
2049 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2050 ieee80211_sta_restart(sdata);
2051 }
2052
Johannes Berg26d59532011-04-01 13:52:48 +02002053 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02002054#else
2055 WARN_ON(1);
2056#endif
David Spinadeld43c6b62013-12-08 21:48:57 +02002057
Johannes Bergf2753dd2009-04-14 10:09:24 +02002058 return 0;
2059}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04002060
Johannes Berg95acac62011-07-12 12:30:59 +02002061void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2062{
2063 struct ieee80211_sub_if_data *sdata;
2064 struct ieee80211_local *local;
2065 struct ieee80211_key *key;
2066
2067 if (WARN_ON(!vif))
2068 return;
2069
2070 sdata = vif_to_sdata(vif);
2071 local = sdata->local;
2072
2073 if (WARN_ON(!local->resuming))
2074 return;
2075
2076 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2077 return;
2078
2079 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2080
2081 mutex_lock(&local->key_mtx);
2082 list_for_each_entry(key, &sdata->key_list, list)
2083 key->flags |= KEY_FLAG_TAINTED;
2084 mutex_unlock(&local->key_mtx);
2085}
2086EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2087
Johannes Berg04ecd252012-09-11 14:34:12 +02002088void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
Johannes Berg0f782312009-12-01 13:37:02 +01002089{
Johannes Berg04ecd252012-09-11 14:34:12 +02002090 struct ieee80211_local *local = sdata->local;
2091 struct ieee80211_chanctx_conf *chanctx_conf;
2092 struct ieee80211_chanctx *chanctx;
Johannes Berg0f782312009-12-01 13:37:02 +01002093
Johannes Berg04ecd252012-09-11 14:34:12 +02002094 mutex_lock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01002095
Johannes Berg04ecd252012-09-11 14:34:12 +02002096 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2097 lockdep_is_held(&local->chanctx_mtx));
Johannes Berg0f782312009-12-01 13:37:02 +01002098
Johannes Berg04ecd252012-09-11 14:34:12 +02002099 if (WARN_ON_ONCE(!chanctx_conf))
Johannes Berg5d8e4232012-09-11 10:17:11 +02002100 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01002101
Johannes Berg04ecd252012-09-11 14:34:12 +02002102 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2103 ieee80211_recalc_smps_chanctx(local, chanctx);
Johannes Berg5d8e4232012-09-11 10:17:11 +02002104 unlock:
Johannes Berg04ecd252012-09-11 14:34:12 +02002105 mutex_unlock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01002106}
Johannes Berg8e664fb2009-12-23 13:15:38 +01002107
Eliad Peller21f659b2013-11-11 20:14:01 +02002108void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2109{
2110 struct ieee80211_local *local = sdata->local;
2111 struct ieee80211_chanctx_conf *chanctx_conf;
2112 struct ieee80211_chanctx *chanctx;
2113
2114 mutex_lock(&local->chanctx_mtx);
2115
2116 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2117 lockdep_is_held(&local->chanctx_mtx));
2118
2119 if (WARN_ON_ONCE(!chanctx_conf))
2120 goto unlock;
2121
2122 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2123 ieee80211_recalc_chanctx_min_def(local, chanctx);
2124 unlock:
2125 mutex_unlock(&local->chanctx_mtx);
2126}
2127
Johannes Berg8e664fb2009-12-23 13:15:38 +01002128static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2129{
2130 int i;
2131
2132 for (i = 0; i < n_ids; i++)
2133 if (ids[i] == id)
2134 return true;
2135 return false;
2136}
2137
Johannes Berg8ed28742014-10-27 12:03:19 +01002138size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2139 const u8 *ids, int n_ids,
2140 const u8 *after_ric, int n_after_ric,
2141 size_t offset)
Johannes Berg8e664fb2009-12-23 13:15:38 +01002142{
2143 size_t pos = offset;
2144
Johannes Berg8ed28742014-10-27 12:03:19 +01002145 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2146 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2147 pos += 2 + ies[pos + 1];
2148
2149 while (pos < ielen &&
2150 !ieee80211_id_in_list(after_ric, n_after_ric,
2151 ies[pos]))
2152 pos += 2 + ies[pos + 1];
2153 } else {
2154 pos += 2 + ies[pos + 1];
2155 }
2156 }
Johannes Berg8e664fb2009-12-23 13:15:38 +01002157
2158 return pos;
2159}
Johannes Berg8ed28742014-10-27 12:03:19 +01002160
2161size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2162 const u8 *ids, int n_ids, size_t offset)
2163{
2164 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2165}
Andrei Otcheretianskia7f3a762014-10-22 15:22:49 +03002166EXPORT_SYMBOL(ieee80211_ie_split);
Johannes Berg8e664fb2009-12-23 13:15:38 +01002167
2168size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2169{
2170 size_t pos = offset;
2171
2172 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2173 pos += 2 + ies[pos + 1];
2174
2175 return pos;
2176}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07002177
2178static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2179 int rssi_min_thold,
2180 int rssi_max_thold)
2181{
2182 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2183
2184 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2185 return;
2186
2187 /*
2188 * Scale up threshold values before storing it, as the RSSI averaging
2189 * algorithm uses a scaled up value as well. Change this scaling
2190 * factor if the RSSI averaging algorithm changes.
2191 */
2192 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2193 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2194}
2195
2196void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2197 int rssi_min_thold,
2198 int rssi_max_thold)
2199{
2200 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2201
2202 WARN_ON(rssi_min_thold == rssi_max_thold ||
2203 rssi_min_thold > rssi_max_thold);
2204
2205 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2206 rssi_max_thold);
2207}
2208EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2209
2210void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2211{
2212 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2213
2214 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2215}
2216EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db3432011-09-28 14:12:51 +03002217
Ben Greearef96a8422011-11-18 11:32:00 -08002218u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07002219 u16 cap)
2220{
2221 __le16 tmp;
2222
2223 *pos++ = WLAN_EID_HT_CAPABILITY;
2224 *pos++ = sizeof(struct ieee80211_ht_cap);
2225 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2226
2227 /* capability flags */
2228 tmp = cpu_to_le16(cap);
2229 memcpy(pos, &tmp, sizeof(u16));
2230 pos += sizeof(u16);
2231
2232 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08002233 *pos++ = ht_cap->ampdu_factor |
2234 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07002235 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2236
2237 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08002238 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2239 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002240
2241 /* extended capabilities */
2242 pos += sizeof(__le16);
2243
2244 /* BF capabilities */
2245 pos += sizeof(__le32);
2246
2247 /* antenna selection */
2248 pos += sizeof(u8);
2249
2250 return pos;
2251}
2252
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002253u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
Johannes Bergcc3983d2012-12-07 12:45:06 +01002254 u32 cap)
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002255{
2256 __le32 tmp;
2257
2258 *pos++ = WLAN_EID_VHT_CAPABILITY;
Mahesh Palivelad4950282012-10-10 11:25:40 +00002259 *pos++ = sizeof(struct ieee80211_vht_cap);
2260 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002261
2262 /* capability flags */
2263 tmp = cpu_to_le32(cap);
2264 memcpy(pos, &tmp, sizeof(u32));
2265 pos += sizeof(u32);
2266
2267 /* VHT MCS set */
2268 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2269 pos += sizeof(vht_cap->vht_mcs);
2270
2271 return pos;
2272}
2273
Johannes Berg074d46d2012-03-15 19:45:16 +01002274u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Johannes Berg4bf88532012-11-09 11:39:59 +01002275 const struct cfg80211_chan_def *chandef,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002276 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002277{
Johannes Berg074d46d2012-03-15 19:45:16 +01002278 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002279 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01002280 *pos++ = WLAN_EID_HT_OPERATION;
2281 *pos++ = sizeof(struct ieee80211_ht_operation);
2282 ht_oper = (struct ieee80211_ht_operation *)pos;
Johannes Berg4bf88532012-11-09 11:39:59 +01002283 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2284 chandef->chan->center_freq);
2285 switch (chandef->width) {
2286 case NL80211_CHAN_WIDTH_160:
2287 case NL80211_CHAN_WIDTH_80P80:
2288 case NL80211_CHAN_WIDTH_80:
2289 case NL80211_CHAN_WIDTH_40:
2290 if (chandef->center_freq1 > chandef->chan->center_freq)
2291 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2292 else
2293 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002294 break;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002295 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01002296 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002297 break;
2298 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07002299 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
Johannes Berg4bf88532012-11-09 11:39:59 +01002300 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2301 chandef->width != NL80211_CHAN_WIDTH_20)
Johannes Berg074d46d2012-03-15 19:45:16 +01002302 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01002303
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002304 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01002305 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002306
2307 /* It seems that Basic MCS set and Supported MCS set
2308 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01002309 memset(&ht_oper->basic_set, 0, 16);
2310 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002311
Johannes Berg074d46d2012-03-15 19:45:16 +01002312 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002313}
2314
Johannes Berg4bf88532012-11-09 11:39:59 +01002315void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
Johannes Berg4a3cb702013-02-12 16:43:19 +01002316 const struct ieee80211_ht_operation *ht_oper,
Johannes Berg4bf88532012-11-09 11:39:59 +01002317 struct cfg80211_chan_def *chandef)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002318{
2319 enum nl80211_channel_type channel_type;
2320
Johannes Berg4bf88532012-11-09 11:39:59 +01002321 if (!ht_oper) {
2322 cfg80211_chandef_create(chandef, control_chan,
2323 NL80211_CHAN_NO_HT);
2324 return;
2325 }
Alexander Simon42e7aa72011-10-26 14:47:26 -07002326
Johannes Berg074d46d2012-03-15 19:45:16 +01002327 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07002328 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2329 channel_type = NL80211_CHAN_HT20;
2330 break;
2331 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2332 channel_type = NL80211_CHAN_HT40PLUS;
2333 break;
2334 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2335 channel_type = NL80211_CHAN_HT40MINUS;
2336 break;
2337 default:
2338 channel_type = NL80211_CHAN_NO_HT;
2339 }
2340
Johannes Berg4bf88532012-11-09 11:39:59 +01002341 cfg80211_chandef_create(chandef, control_chan, channel_type);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002342}
2343
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002344int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2345 const struct ieee80211_supported_band *sband,
2346 const u8 *srates, int srates_len, u32 *rates)
2347{
2348 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2349 int shift = ieee80211_chandef_get_shift(chandef);
2350 struct ieee80211_rate *br;
2351 int brate, rate, i, j, count = 0;
2352
2353 *rates = 0;
2354
2355 for (i = 0; i < srates_len; i++) {
2356 rate = srates[i] & 0x7f;
2357
2358 for (j = 0; j < sband->n_bitrates; j++) {
2359 br = &sband->bitrates[j];
2360 if ((rate_flags & br->flags) != rate_flags)
2361 continue;
2362
2363 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2364 if (brate == rate) {
2365 *rates |= BIT(j);
2366 count++;
2367 break;
2368 }
2369 }
2370 }
2371 return count;
2372}
2373
Johannes Bergfc8a7322012-06-28 10:33:25 +02002374int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002375 struct sk_buff *skb, bool need_basic,
2376 enum ieee80211_band band)
Arik Nemtsov768db3432011-09-28 14:12:51 +03002377{
Arik Nemtsov768db3432011-09-28 14:12:51 +03002378 struct ieee80211_local *local = sdata->local;
2379 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002380 int rate, shift;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002381 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002382 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002383 u32 rate_flags;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002384
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002385 shift = ieee80211_vif_get_shift(&sdata->vif);
2386 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
Johannes Berg6b778632012-07-23 14:53:27 +02002387 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002388 rates = 0;
2389 for (i = 0; i < sband->n_bitrates; i++) {
2390 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2391 continue;
2392 rates++;
2393 }
Arik Nemtsov768db3432011-09-28 14:12:51 +03002394 if (rates > 8)
2395 rates = 8;
2396
2397 if (skb_tailroom(skb) < rates + 2)
2398 return -ENOMEM;
2399
2400 pos = skb_put(skb, rates + 2);
2401 *pos++ = WLAN_EID_SUPP_RATES;
2402 *pos++ = rates;
2403 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002404 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002405 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2406 continue;
2407
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002408 if (need_basic && basic_rates & BIT(i))
2409 basic = 0x80;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002410 rate = sband->bitrates[i].bitrate;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002411 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2412 5 * (1 << shift));
2413 *pos++ = basic | (u8) rate;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002414 }
2415
2416 return 0;
2417}
2418
Johannes Bergfc8a7322012-06-28 10:33:25 +02002419int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002420 struct sk_buff *skb, bool need_basic,
2421 enum ieee80211_band band)
Arik Nemtsov768db3432011-09-28 14:12:51 +03002422{
Arik Nemtsov768db3432011-09-28 14:12:51 +03002423 struct ieee80211_local *local = sdata->local;
2424 struct ieee80211_supported_band *sband;
Chun-Yeow Yeohcc63ec72013-09-07 23:40:44 -07002425 int rate, shift;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002426 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002427 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002428 u32 rate_flags;
2429
2430 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2431 shift = ieee80211_vif_get_shift(&sdata->vif);
Arik Nemtsov768db3432011-09-28 14:12:51 +03002432
Johannes Berg6b778632012-07-23 14:53:27 +02002433 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002434 exrates = 0;
2435 for (i = 0; i < sband->n_bitrates; i++) {
2436 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2437 continue;
2438 exrates++;
2439 }
2440
Arik Nemtsov768db3432011-09-28 14:12:51 +03002441 if (exrates > 8)
2442 exrates -= 8;
2443 else
2444 exrates = 0;
2445
2446 if (skb_tailroom(skb) < exrates + 2)
2447 return -ENOMEM;
2448
2449 if (exrates) {
2450 pos = skb_put(skb, exrates + 2);
2451 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2452 *pos++ = exrates;
2453 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002454 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002455 if ((rate_flags & sband->bitrates[i].flags)
2456 != rate_flags)
2457 continue;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002458 if (need_basic && basic_rates & BIT(i))
2459 basic = 0x80;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002460 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2461 5 * (1 << shift));
2462 *pos++ = basic | (u8) rate;
Arik Nemtsov768db3432011-09-28 14:12:51 +03002463 }
2464 }
2465 return 0;
2466}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002467
2468int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2469{
2470 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2471 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2472
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07002473 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2474 /* non-managed type inferfaces */
2475 return 0;
2476 }
Emmanuel Grumbach3a7bba62013-03-20 17:05:45 +02002477 return ifmgd->ave_beacon_signal / 16;
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002478}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07002479EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
Johannes Berg04ecd252012-09-11 14:34:12 +02002480
2481u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2482{
2483 if (!mcs)
2484 return 1;
2485
2486 /* TODO: consider rx_highest */
2487
2488 if (mcs->rx_mask[3])
2489 return 4;
2490 if (mcs->rx_mask[2])
2491 return 3;
2492 if (mcs->rx_mask[1])
2493 return 2;
2494 return 1;
2495}
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002496
2497/**
2498 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2499 * @local: mac80211 hw info struct
2500 * @status: RX status
2501 * @mpdu_len: total MPDU length (including FCS)
2502 * @mpdu_offset: offset into MPDU to calculate timestamp at
2503 *
2504 * This function calculates the RX timestamp at the given MPDU offset, taking
2505 * into account what the RX timestamp was. An offset of 0 will just normalize
2506 * the timestamp to TSF at beginning of MPDU reception.
2507 */
2508u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2509 struct ieee80211_rx_status *status,
2510 unsigned int mpdu_len,
2511 unsigned int mpdu_offset)
2512{
2513 u64 ts = status->mactime;
2514 struct rate_info ri;
2515 u16 rate;
2516
2517 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2518 return 0;
2519
2520 memset(&ri, 0, sizeof(ri));
2521
2522 /* Fill cfg80211 rate info */
2523 if (status->flag & RX_FLAG_HT) {
2524 ri.mcs = status->rate_idx;
2525 ri.flags |= RATE_INFO_FLAGS_MCS;
2526 if (status->flag & RX_FLAG_40MHZ)
2527 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2528 if (status->flag & RX_FLAG_SHORT_GI)
2529 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Johannes Berg56146182012-11-09 15:07:02 +01002530 } else if (status->flag & RX_FLAG_VHT) {
2531 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2532 ri.mcs = status->rate_idx;
2533 ri.nss = status->vht_nss;
2534 if (status->flag & RX_FLAG_40MHZ)
2535 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002536 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002537 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002538 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002539 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002540 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002541 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2542 if (status->flag & RX_FLAG_SHORT_GI)
2543 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002544 } else {
2545 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002546 int shift = 0;
2547 int bitrate;
2548
2549 if (status->flag & RX_FLAG_10MHZ)
2550 shift = 1;
2551 if (status->flag & RX_FLAG_5MHZ)
2552 shift = 2;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002553
2554 sband = local->hw.wiphy->bands[status->band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002555 bitrate = sband->bitrates[status->rate_idx].bitrate;
2556 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002557 }
2558
2559 rate = cfg80211_calculate_bitrate(&ri);
Johannes Bergd86aa4f2013-10-11 15:47:06 +02002560 if (WARN_ONCE(!rate,
2561 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2562 status->flag, status->rate_idx, status->vht_nss))
2563 return 0;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002564
2565 /* rewind from end of MPDU */
2566 if (status->flag & RX_FLAG_MACTIME_END)
2567 ts -= mpdu_len * 8 * 10 / rate;
2568
2569 ts += mpdu_offset * 8 * 10 / rate;
2570
2571 return ts;
2572}
Simon Wunderlich164eb022013-02-08 18:16:20 +01002573
2574void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2575{
2576 struct ieee80211_sub_if_data *sdata;
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002577 struct cfg80211_chan_def chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002578
Johannes Berg34a37402013-12-18 09:43:33 +01002579 mutex_lock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002580 mutex_lock(&local->iflist_mtx);
2581 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg34a37402013-12-18 09:43:33 +01002582 /* it might be waiting for the local->mtx, but then
2583 * by the time it gets it, sdata->wdev.cac_started
2584 * will no longer be true
2585 */
2586 cancel_delayed_work(&sdata->dfs_cac_timer_work);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002587
2588 if (sdata->wdev.cac_started) {
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002589 chandef = sdata->vif.bss_conf.chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002590 ieee80211_vif_release_channel(sdata);
2591 cfg80211_cac_event(sdata->dev,
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002592 &chandef,
Simon Wunderlich164eb022013-02-08 18:16:20 +01002593 NL80211_RADAR_CAC_ABORTED,
2594 GFP_KERNEL);
2595 }
2596 }
2597 mutex_unlock(&local->iflist_mtx);
Johannes Berg34a37402013-12-18 09:43:33 +01002598 mutex_unlock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002599}
2600
2601void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2602{
2603 struct ieee80211_local *local =
2604 container_of(work, struct ieee80211_local, radar_detected_work);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002605 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
Michal Kazior486cf4c2014-10-10 12:43:23 +02002606 struct ieee80211_chanctx *ctx;
2607 int num_chanctx = 0;
2608
2609 mutex_lock(&local->chanctx_mtx);
2610 list_for_each_entry(ctx, &local->chanctx_list, list) {
2611 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2612 continue;
2613
2614 num_chanctx++;
2615 chandef = ctx->conf.def;
2616 }
2617 mutex_unlock(&local->chanctx_mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002618
2619 ieee80211_dfs_cac_cancel(local);
2620
Michal Kazior486cf4c2014-10-10 12:43:23 +02002621 if (num_chanctx > 1)
2622 /* XXX: multi-channel is not supported yet */
Simon Wunderlich164eb022013-02-08 18:16:20 +01002623 WARN_ON(1);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002624 else
Simon Wunderlich164eb022013-02-08 18:16:20 +01002625 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002626}
2627
2628void ieee80211_radar_detected(struct ieee80211_hw *hw)
2629{
2630 struct ieee80211_local *local = hw_to_local(hw);
2631
2632 trace_api_radar_detected(local);
2633
2634 ieee80211_queue_work(hw, &local->radar_detected_work);
2635}
2636EXPORT_SYMBOL(ieee80211_radar_detected);
Simon Wunderliche6b7cde2013-08-28 13:41:29 +02002637
2638u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2639{
2640 u32 ret;
2641 int tmp;
2642
2643 switch (c->width) {
2644 case NL80211_CHAN_WIDTH_20:
2645 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2646 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2647 break;
2648 case NL80211_CHAN_WIDTH_40:
2649 c->width = NL80211_CHAN_WIDTH_20;
2650 c->center_freq1 = c->chan->center_freq;
2651 ret = IEEE80211_STA_DISABLE_40MHZ |
2652 IEEE80211_STA_DISABLE_VHT;
2653 break;
2654 case NL80211_CHAN_WIDTH_80:
2655 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2656 /* n_P40 */
2657 tmp /= 2;
2658 /* freq_P40 */
2659 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2660 c->width = NL80211_CHAN_WIDTH_40;
2661 ret = IEEE80211_STA_DISABLE_VHT;
2662 break;
2663 case NL80211_CHAN_WIDTH_80P80:
2664 c->center_freq2 = 0;
2665 c->width = NL80211_CHAN_WIDTH_80;
2666 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2667 IEEE80211_STA_DISABLE_160MHZ;
2668 break;
2669 case NL80211_CHAN_WIDTH_160:
2670 /* n_P20 */
2671 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2672 /* n_P80 */
2673 tmp /= 4;
2674 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2675 c->width = NL80211_CHAN_WIDTH_80;
2676 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2677 IEEE80211_STA_DISABLE_160MHZ;
2678 break;
2679 default:
2680 case NL80211_CHAN_WIDTH_20_NOHT:
2681 WARN_ON_ONCE(1);
2682 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2683 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2684 break;
2685 case NL80211_CHAN_WIDTH_5:
2686 case NL80211_CHAN_WIDTH_10:
2687 WARN_ON_ONCE(1);
2688 /* keep c->width */
2689 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2690 break;
2691 }
2692
2693 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2694
2695 return ret;
2696}
Emmanuel Grumbach687da132013-10-01 16:45:43 +03002697
2698/*
2699 * Returns true if smps_mode_new is strictly more restrictive than
2700 * smps_mode_old.
2701 */
2702bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2703 enum ieee80211_smps_mode smps_mode_new)
2704{
2705 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2706 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2707 return false;
2708
2709 switch (smps_mode_old) {
2710 case IEEE80211_SMPS_STATIC:
2711 return false;
2712 case IEEE80211_SMPS_DYNAMIC:
2713 return smps_mode_new == IEEE80211_SMPS_STATIC;
2714 case IEEE80211_SMPS_OFF:
2715 return smps_mode_new != IEEE80211_SMPS_OFF;
2716 default:
2717 WARN_ON(1);
2718 }
2719
2720 return false;
2721}
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002722
2723int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2724 struct cfg80211_csa_settings *csa_settings)
2725{
2726 struct sk_buff *skb;
2727 struct ieee80211_mgmt *mgmt;
2728 struct ieee80211_local *local = sdata->local;
2729 int freq;
2730 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2731 sizeof(mgmt->u.action.u.chan_switch);
2732 u8 *pos;
2733
2734 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2735 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2736 return -EOPNOTSUPP;
2737
2738 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2739 5 + /* channel switch announcement element */
2740 3 + /* secondary channel offset element */
2741 8); /* mesh channel switch parameters element */
2742 if (!skb)
2743 return -ENOMEM;
2744
2745 skb_reserve(skb, local->tx_headroom);
2746 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2747 memset(mgmt, 0, hdr_len);
2748 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2749 IEEE80211_STYPE_ACTION);
2750
2751 eth_broadcast_addr(mgmt->da);
2752 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2753 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2754 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2755 } else {
2756 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2757 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2758 }
2759 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2760 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2761 pos = skb_put(skb, 5);
2762 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2763 *pos++ = 3; /* IE length */
2764 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2765 freq = csa_settings->chandef.chan->center_freq;
2766 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2767 *pos++ = csa_settings->count; /* count */
2768
2769 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2770 enum nl80211_channel_type ch_type;
2771
2772 skb_put(skb, 3);
2773 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2774 *pos++ = 1; /* IE length */
2775 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2776 if (ch_type == NL80211_CHAN_HT40PLUS)
2777 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2778 else
2779 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2780 }
2781
2782 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2783 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002784
2785 skb_put(skb, 8);
2786 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2787 *pos++ = 6; /* IE length */
2788 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2789 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2790 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2791 *pos++ |= csa_settings->block_tx ?
2792 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2793 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2794 pos += 2;
Chun-Yeow Yeohca91dc92013-11-12 10:31:48 +08002795 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002796 pos += 2;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002797 }
2798
2799 ieee80211_tx_skb(sdata, skb);
2800 return 0;
2801}
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002802
2803bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2804{
2805 return !(cs == NULL || cs->cipher == 0 ||
2806 cs->hdr_len < cs->pn_len + cs->pn_off ||
2807 cs->hdr_len <= cs->key_idx_off ||
2808 cs->key_idx_shift > 7 ||
2809 cs->key_idx_mask == 0);
2810}
2811
2812bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2813{
2814 int i;
2815
2816 /* Ensure we have enough iftype bitmap space for all iftype values */
2817 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2818
2819 for (i = 0; i < n; i++)
2820 if (!ieee80211_cs_valid(&cs[i]))
2821 return false;
2822
2823 return true;
2824}
2825
2826const struct ieee80211_cipher_scheme *
2827ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2828 enum nl80211_iftype iftype)
2829{
2830 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2831 int n = local->hw.n_cipher_schemes;
2832 int i;
2833 const struct ieee80211_cipher_scheme *cs = NULL;
2834
2835 for (i = 0; i < n; i++) {
2836 if (l[i].cipher == cipher) {
2837 cs = &l[i];
2838 break;
2839 }
2840 }
2841
2842 if (!cs || !(cs->iftype & BIT(iftype)))
2843 return NULL;
2844
2845 return cs;
2846}
2847
2848int ieee80211_cs_headroom(struct ieee80211_local *local,
2849 struct cfg80211_crypto_settings *crypto,
2850 enum nl80211_iftype iftype)
2851{
2852 const struct ieee80211_cipher_scheme *cs;
2853 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2854 int i;
2855
2856 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2857 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2858 iftype);
2859
2860 if (cs && headroom < cs->hdr_len)
2861 headroom = cs->hdr_len;
2862 }
2863
2864 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2865 if (cs && headroom < cs->hdr_len)
2866 headroom = cs->hdr_len;
2867
2868 return headroom;
2869}
Felix Fietkaua7022e62013-12-16 21:49:14 +01002870
2871static bool
2872ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2873{
2874 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2875 int skip;
2876
2877 if (end > 0)
2878 return false;
2879
2880 /* End time is in the past, check for repetitions */
2881 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2882 if (data->count[i] < 255) {
2883 if (data->count[i] <= skip) {
2884 data->count[i] = 0;
2885 return false;
2886 }
2887
2888 data->count[i] -= skip;
2889 }
2890
2891 data->desc[i].start += skip * data->desc[i].interval;
2892
2893 return true;
2894}
2895
2896static bool
2897ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2898 s32 *offset)
2899{
2900 bool ret = false;
2901 int i;
2902
2903 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2904 s32 cur;
2905
2906 if (!data->count[i])
2907 continue;
2908
2909 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2910 ret = true;
2911
2912 cur = data->desc[i].start - tsf;
2913 if (cur > *offset)
2914 continue;
2915
2916 cur = data->desc[i].start + data->desc[i].duration - tsf;
2917 if (cur > *offset)
2918 *offset = cur;
2919 }
2920
2921 return ret;
2922}
2923
2924static u32
2925ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2926{
2927 s32 offset = 0;
2928 int tries = 0;
2929 /*
2930 * arbitrary limit, used to avoid infinite loops when combined NoA
2931 * descriptors cover the full time period.
2932 */
2933 int max_tries = 5;
2934
2935 ieee80211_extend_absent_time(data, tsf, &offset);
2936 do {
2937 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2938 break;
2939
2940 tries++;
2941 } while (tries < max_tries);
2942
2943 return offset;
2944}
2945
2946void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2947{
2948 u32 next_offset = BIT(31) - 1;
2949 int i;
2950
2951 data->absent = 0;
2952 data->has_next_tsf = false;
2953 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2954 s32 start;
2955
2956 if (!data->count[i])
2957 continue;
2958
2959 ieee80211_extend_noa_desc(data, tsf, i);
2960 start = data->desc[i].start - tsf;
2961 if (start <= 0)
2962 data->absent |= BIT(i);
2963
2964 if (next_offset > start)
2965 next_offset = start;
2966
2967 data->has_next_tsf = true;
2968 }
2969
2970 if (data->absent)
2971 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2972
2973 data->next_tsf = tsf + next_offset;
2974}
2975EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2976
2977int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2978 struct ieee80211_noa_data *data, u32 tsf)
2979{
2980 int ret = 0;
2981 int i;
2982
2983 memset(data, 0, sizeof(*data));
2984
2985 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2986 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2987
2988 if (!desc->count || !desc->duration)
2989 continue;
2990
2991 data->count[i] = desc->count;
2992 data->desc[i].start = le32_to_cpu(desc->start_time);
2993 data->desc[i].duration = le32_to_cpu(desc->duration);
2994 data->desc[i].interval = le32_to_cpu(desc->interval);
2995
2996 if (data->count[i] > 1 &&
2997 data->desc[i].interval < data->desc[i].duration)
2998 continue;
2999
3000 ieee80211_extend_noa_desc(data, tsf, i);
3001 ret++;
3002 }
3003
3004 if (ret)
3005 ieee80211_update_p2p_noa(data, tsf);
3006
3007 return ret;
3008}
3009EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
Thomas Pedersen057d5f42013-12-19 10:25:15 -08003010
3011void ieee80211_recalc_dtim(struct ieee80211_local *local,
3012 struct ieee80211_sub_if_data *sdata)
3013{
3014 u64 tsf = drv_get_tsf(local, sdata);
3015 u64 dtim_count = 0;
3016 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3017 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3018 struct ps_data *ps;
3019 u8 bcns_from_dtim;
3020
3021 if (tsf == -1ULL || !beacon_int || !dtim_period)
3022 return;
3023
3024 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3025 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3026 if (!sdata->bss)
3027 return;
3028
3029 ps = &sdata->bss->ps;
3030 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3031 ps = &sdata->u.mesh.ps;
3032 } else {
3033 return;
3034 }
3035
3036 /*
3037 * actually finds last dtim_count, mac80211 will update in
3038 * __beacon_add_tim().
3039 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3040 */
3041 do_div(tsf, beacon_int);
3042 bcns_from_dtim = do_div(tsf, dtim_period);
3043 /* just had a DTIM */
3044 if (!bcns_from_dtim)
3045 dtim_count = 0;
3046 else
3047 dtim_count = dtim_period - bcns_from_dtim;
3048
3049 ps->dtim_count = dtim_count;
3050}
Luciano Coelho73de86a2014-02-13 11:31:59 +02003051
Michal Kazior71e61952014-06-25 12:35:07 +02003052static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3053 struct ieee80211_chanctx *ctx)
3054{
3055 struct ieee80211_sub_if_data *sdata;
3056 u8 radar_detect = 0;
3057
3058 lockdep_assert_held(&local->chanctx_mtx);
3059
3060 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3061 return 0;
3062
3063 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3064 if (sdata->reserved_radar_required)
3065 radar_detect |= BIT(sdata->reserved_chandef.width);
3066
3067 /*
3068 * An in-place reservation context should not have any assigned vifs
3069 * until it replaces the other context.
3070 */
3071 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3072 !list_empty(&ctx->assigned_vifs));
3073
3074 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3075 if (sdata->radar_required)
3076 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3077
3078 return radar_detect;
3079}
3080
Luciano Coelho73de86a2014-02-13 11:31:59 +02003081int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3082 const struct cfg80211_chan_def *chandef,
3083 enum ieee80211_chanctx_mode chanmode,
3084 u8 radar_detect)
3085{
3086 struct ieee80211_local *local = sdata->local;
3087 struct ieee80211_sub_if_data *sdata_iter;
3088 enum nl80211_iftype iftype = sdata->wdev.iftype;
3089 int num[NUM_NL80211_IFTYPES];
3090 struct ieee80211_chanctx *ctx;
Luciano Coelhob6a55012014-02-27 11:07:21 +02003091 int num_different_channels = 0;
Luciano Coelho73de86a2014-02-13 11:31:59 +02003092 int total = 1;
3093
3094 lockdep_assert_held(&local->chanctx_mtx);
3095
3096 if (WARN_ON(hweight32(radar_detect) > 1))
3097 return -EINVAL;
3098
Luciano Coelhob6a55012014-02-27 11:07:21 +02003099 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3100 !chandef->chan))
Luciano Coelho73de86a2014-02-13 11:31:59 +02003101 return -EINVAL;
3102
Luciano Coelhob6a55012014-02-27 11:07:21 +02003103 if (chandef)
3104 num_different_channels = 1;
3105
Luciano Coelho73de86a2014-02-13 11:31:59 +02003106 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3107 return -EINVAL;
3108
3109 /* Always allow software iftypes */
3110 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3111 if (radar_detect)
3112 return -EINVAL;
3113 return 0;
3114 }
3115
3116 memset(num, 0, sizeof(num));
3117
3118 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3119 num[iftype] = 1;
3120
3121 list_for_each_entry(ctx, &local->chanctx_list, list) {
Michal Kazior5bcae312014-06-25 12:35:06 +02003122 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3123 continue;
Michal Kazior71e61952014-06-25 12:35:07 +02003124 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
Luciano Coelho73de86a2014-02-13 11:31:59 +02003125 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3126 num_different_channels++;
3127 continue;
3128 }
Luciano Coelhob6a55012014-02-27 11:07:21 +02003129 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
Luciano Coelho73de86a2014-02-13 11:31:59 +02003130 cfg80211_chandef_compatible(chandef,
3131 &ctx->conf.def))
3132 continue;
3133 num_different_channels++;
3134 }
3135
3136 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3137 struct wireless_dev *wdev_iter;
3138
3139 wdev_iter = &sdata_iter->wdev;
3140
3141 if (sdata_iter == sdata ||
3142 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3143 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3144 continue;
3145
3146 num[wdev_iter->iftype]++;
3147 total++;
3148 }
3149
3150 if (total == 1 && !radar_detect)
3151 return 0;
3152
3153 return cfg80211_check_combinations(local->hw.wiphy,
3154 num_different_channels,
3155 radar_detect, num);
3156}
Michal Kazior6fa001b2014-04-09 15:29:23 +02003157
3158static void
3159ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3160 void *data)
3161{
3162 u32 *max_num_different_channels = data;
3163
3164 *max_num_different_channels = max(*max_num_different_channels,
3165 c->num_different_channels);
3166}
3167
3168int ieee80211_max_num_channels(struct ieee80211_local *local)
3169{
3170 struct ieee80211_sub_if_data *sdata;
3171 int num[NUM_NL80211_IFTYPES] = {};
3172 struct ieee80211_chanctx *ctx;
3173 int num_different_channels = 0;
3174 u8 radar_detect = 0;
3175 u32 max_num_different_channels = 1;
3176 int err;
3177
3178 lockdep_assert_held(&local->chanctx_mtx);
3179
3180 list_for_each_entry(ctx, &local->chanctx_list, list) {
Michal Kazior5bcae312014-06-25 12:35:06 +02003181 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3182 continue;
3183
Michal Kazior6fa001b2014-04-09 15:29:23 +02003184 num_different_channels++;
3185
Michal Kazior71e61952014-06-25 12:35:07 +02003186 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
Michal Kazior6fa001b2014-04-09 15:29:23 +02003187 }
3188
3189 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3190 num[sdata->wdev.iftype]++;
3191
3192 err = cfg80211_iter_combinations(local->hw.wiphy,
3193 num_different_channels, radar_detect,
3194 num, ieee80211_iter_max_chans,
3195 &max_num_different_channels);
3196 if (err < 0)
3197 return err;
3198
3199 return max_num_different_channels;
3200}
Arik Nemtsov40b861a2014-07-17 17:14:23 +03003201
3202u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3203{
3204 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3205 *buf++ = 7; /* len */
3206 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3207 *buf++ = 0x50;
3208 *buf++ = 0xf2;
3209 *buf++ = 2; /* WME */
3210 *buf++ = 0; /* WME info */
3211 *buf++ = 1; /* WME ver */
3212 *buf++ = qosinfo; /* U-APSD no in use */
3213
3214 return buf;
3215}