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mac80211_hwsim: suggest nl80211 instead of wext driver in documentation
[linux-2.6-block.git] / net / mac80211 / tx.c
CommitLineData
e2ebc74d
JB		 1/*
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>
d98ad83e 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
e2ebc74d
JB		 7 *
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 *
13 * Transmit and frame generation functions.
14 */
15
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/bitmap.h>
d4e46a3d 21#include <linux/rcupdate.h>
bc3b2d7f 22#include <linux/export.h>
881d966b 23#include <net/net_namespace.h>
e2ebc74d
JB		 24#include <net/ieee80211_radiotap.h>
25#include <net/cfg80211.h>
26#include <net/mac80211.h>
5caa328e
MK		 27#include <net/codel.h>
28#include <net/codel_impl.h>
e2ebc74d 29#include <asm/unaligned.h>
fa962b92 30#include <net/fq_impl.h>
e2ebc74d
JB		 31
32#include "ieee80211_i.h"
24487981 33#include "driver-ops.h"
2c8dccc7 34#include "led.h"
33b64eb2 35#include "mesh.h"
e2ebc74d
JB		 36#include "wep.h"
37#include "wpa.h"
38#include "wme.h"
2c8dccc7 39#include "rate.h"
e2ebc74d 40
e2ebc74d
JB		 41/* misc utils */
42
5a490510
JB		 43static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
44{
45 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
46
47 u64_stats_update_begin(&tstats->syncp);
48 tstats->tx_packets++;
49 tstats->tx_bytes += len;
50 u64_stats_update_end(&tstats->syncp);
51}
52
252b86c4
JB		 53static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
54 struct sk_buff *skb, int group_addr,
03f93c3d 55 int next_frag_len)
e2ebc74d 56{
2103dec1 57 int rate, mrate, erp, dur, i, shift = 0;
2e92e6f2 58 struct ieee80211_rate *txrate;
e2ebc74d 59 struct ieee80211_local *local = tx->local;
8318d78a 60 struct ieee80211_supported_band *sband;
358c8d9d 61 struct ieee80211_hdr *hdr;
252b86c4 62 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2103dec1
SW		 63 struct ieee80211_chanctx_conf *chanctx_conf;
64 u32 rate_flags = 0;
65
66 rcu_read_lock();
67 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
68 if (chanctx_conf) {
69 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
70 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
71 }
72 rcu_read_unlock();
e6a9854b
JB		 73
74 /* assume HW handles this */
336004e2 75 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
e6a9854b
JB		 76 return 0;
77
78 /* uh huh? */
0d528d85 79 if (WARN_ON_ONCE(tx->rate.idx < 0))
e6a9854b 80 return 0;
e2ebc74d 81
2d56577b 82 sband = local->hw.wiphy->bands[info->band];
0d528d85 83 txrate = &sband->bitrates[tx->rate.idx];
8318d78a 84
e6a9854b 85 erp = txrate->flags & IEEE80211_RATE_ERP_G;
e2ebc74d
JB		 86
87 /*
88 * data and mgmt (except PS Poll):
89 * - during CFP: 32768
90 * - during contention period:
91 * if addr1 is group address: 0
92 * if more fragments = 0 and addr1 is individual address: time to
93 * transmit one ACK plus SIFS
94 * if more fragments = 1 and addr1 is individual address: time to
95 * transmit next fragment plus 2 x ACK plus 3 x SIFS
96 *
97 * IEEE 802.11, 9.6:
98 * - control response frame (CTS or ACK) shall be transmitted using the
99 * same rate as the immediately previous frame in the frame exchange
100 * sequence, if this rate belongs to the PHY mandatory rates, or else
101 * at the highest possible rate belonging to the PHY rates in the
102 * BSSBasicRateSet
103 */
252b86c4 104 hdr = (struct ieee80211_hdr *)skb->data;
358c8d9d 105 if (ieee80211_is_ctl(hdr->frame_control)) {
e2ebc74d 106 /* TODO: These control frames are not currently sent by
ccd7b362 107 * mac80211, but should they be implemented, this function
e2ebc74d
JB		 108 * needs to be updated to support duration field calculation.
109 *
110 * RTS: time needed to transmit pending data/mgmt frame plus
111 * one CTS frame plus one ACK frame plus 3 x SIFS
112 * CTS: duration of immediately previous RTS minus time
113 * required to transmit CTS and its SIFS
114 * ACK: 0 if immediately previous directed data/mgmt had
115 * more=0, with more=1 duration in ACK frame is duration
116 * from previous frame minus time needed to transmit ACK
117 * and its SIFS
118 * PS Poll: BIT(15) | BIT(14) | aid
119 */
120 return 0;
121 }
122
123 /* data/mgmt */
124 if (0 /* FIX: data/mgmt during CFP */)
03f93c3d 125 return cpu_to_le16(32768);
e2ebc74d
JB		 126
127 if (group_addr) /* Group address as the destination - no ACK */
128 return 0;
129
130 /* Individual destination address:
131 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
132 * CTS and ACK frames shall be transmitted using the highest rate in
133 * basic rate set that is less than or equal to the rate of the
134 * immediately previous frame and that is using the same modulation
135 * (CCK or OFDM). If no basic rate set matches with these requirements,
136 * the highest mandatory rate of the PHY that is less than or equal to
137 * the rate of the previous frame is used.
138 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
139 */
140 rate = -1;
8318d78a
JB		 141 /* use lowest available if everything fails */
142 mrate = sband->bitrates[0].bitrate;
143 for (i = 0; i < sband->n_bitrates; i++) {
144 struct ieee80211_rate *r = &sband->bitrates[i];
e2ebc74d 145
8318d78a
JB		 146 if (r->bitrate > txrate->bitrate)
147 break;
e2ebc74d 148
2103dec1
SW		 149 if ((rate_flags & r->flags) != rate_flags)
150 continue;
151
bda3933a 152 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
2103dec1 153 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
8318d78a
JB		 154
155 switch (sband->band) {
57fbcce3 156 case NL80211_BAND_2GHZ: {
8318d78a
JB		 157 u32 flag;
158 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
159 flag = IEEE80211_RATE_MANDATORY_G;
160 else
161 flag = IEEE80211_RATE_MANDATORY_B;
162 if (r->flags & flag)
163 mrate = r->bitrate;
164 break;
165 }
57fbcce3 166 case NL80211_BAND_5GHZ:
8318d78a
JB		 167 if (r->flags & IEEE80211_RATE_MANDATORY_A)
168 mrate = r->bitrate;
169 break;
57fbcce3 170 case NL80211_BAND_60GHZ:
3a0c52a6 171 /* TODO, for now fall through */
57fbcce3 172 case NUM_NL80211_BANDS:
8318d78a
JB		 173 WARN_ON(1);
174 break;
175 }
e2ebc74d
JB		 176 }
177 if (rate == -1) {
178 /* No matching basic rate found; use highest suitable mandatory
179 * PHY rate */
2103dec1 180 rate = DIV_ROUND_UP(mrate, 1 << shift);
e2ebc74d
JB		 181 }
182
6674f210
SW		 183 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
184 if (ieee80211_is_data_qos(hdr->frame_control) &&
c26a0e10 185 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
6674f210
SW		 186 dur = 0;
187 else
188 /* Time needed to transmit ACK
189 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
190 * to closest integer */
4ee73f33 191 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
438b61b7
SW		 192 tx->sdata->vif.bss_conf.use_short_preamble,
193 shift);
e2ebc74d
JB		 194
195 if (next_frag_len) {
196 /* Frame is fragmented: duration increases with time needed to
197 * transmit next fragment plus ACK and 2 x SIFS. */
198 dur *= 2; /* ACK + SIFS */
199 /* next fragment */
4ee73f33 200 dur += ieee80211_frame_duration(sband->band, next_frag_len,
8318d78a 201 txrate->bitrate, erp,
438b61b7
SW		 202 tx->sdata->vif.bss_conf.use_short_preamble,
203 shift);
e2ebc74d
JB		 204 }
205
03f93c3d 206 return cpu_to_le16(dur);
e2ebc74d
JB		 207}
208
e2ebc74d 209/* tx handlers */
5c1b98a5
KV		 210static ieee80211_tx_result debug_noinline
211ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
212{
213 struct ieee80211_local *local = tx->local;
0c74211d 214 struct ieee80211_if_managed *ifmgd;
5c1b98a5
KV		 215
216 /* driver doesn't support power save */
30686bf7 217 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
5c1b98a5
KV		 218 return TX_CONTINUE;
219
220 /* hardware does dynamic power save */
30686bf7 221 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
5c1b98a5
KV		 222 return TX_CONTINUE;
223
224 /* dynamic power save disabled */
225 if (local->hw.conf.dynamic_ps_timeout <= 0)
226 return TX_CONTINUE;
227
228 /* we are scanning, don't enable power save */
229 if (local->scanning)
230 return TX_CONTINUE;
231
232 if (!local->ps_sdata)
233 return TX_CONTINUE;
234
235 /* No point if we're going to suspend */
236 if (local->quiescing)
237 return TX_CONTINUE;
238
0c74211d
KV		 239 /* dynamic ps is supported only in managed mode */
240 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
241 return TX_CONTINUE;
242
243 ifmgd = &tx->sdata->u.mgd;
244
245 /*
246 * Don't wakeup from power save if u-apsd is enabled, voip ac has
247 * u-apsd enabled and the frame is in voip class. This effectively
248 * means that even if all access categories have u-apsd enabled, in
249 * practise u-apsd is only used with the voip ac. This is a
250 * workaround for the case when received voip class packets do not
251 * have correct qos tag for some reason, due the network or the
252 * peer application.
253 *
dc41e4d4 254 * Note: ifmgd->uapsd_queues access is racy here. If the value is
0c74211d
KV		 255 * changed via debugfs, user needs to reassociate manually to have
256 * everything in sync.
257 */
4875d30d
JB		 258 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
259 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
260 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
0c74211d
KV		 261 return TX_CONTINUE;
262
5c1b98a5
KV		 263 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
264 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 265 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 266 IEEE80211_QUEUE_STOP_REASON_PS,
267 false);
db28569a 268 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
5c1b98a5
KV		 269 ieee80211_queue_work(&local->hw,
270 &local->dynamic_ps_disable_work);
271 }
272
5db1c07c
LC		 273 /* Don't restart the timer if we're not disassociated */
274 if (!ifmgd->associated)
275 return TX_CONTINUE;
276
5c1b98a5
KV		 277 mod_timer(&local->dynamic_ps_timer, jiffies +
278 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
279
280 return TX_CONTINUE;
281}
e2ebc74d 282
d9e8a70f 283static ieee80211_tx_result debug_noinline
5cf121c3 284ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
e2ebc74d 285{
358c8d9d 286
e039fa4a 287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
e039fa4a 288 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
c2c98fde 289 bool assoc = false;
e2ebc74d 290
e039fa4a 291 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
9ae54c84 292 return TX_CONTINUE;
58d4185e 293
b23b025f
BG		 294 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
295 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
a9a6ffff
KV		 296 !ieee80211_is_probe_req(hdr->frame_control) &&
297 !ieee80211_is_nullfunc(hdr->frame_control))
298 /*
299 * When software scanning only nullfunc frames (to notify
300 * the sleep state to the AP) and probe requests (for the
301 * active scan) are allowed, all other frames should not be
302 * sent and we should not get here, but if we do
303 * nonetheless, drop them to avoid sending them
304 * off-channel. See the link below and
305 * ieee80211_start_scan() for more.
306 *
307 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
308 */
9ae54c84 309 return TX_DROP;
e2ebc74d 310
239281f8
RL		 311 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
312 return TX_CONTINUE;
313
1be7fe8d
BJ		 314 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
315 return TX_CONTINUE;
316
5cf121c3 317 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
9ae54c84 318 return TX_CONTINUE;
e2ebc74d 319
c2c98fde
JB		 320 if (tx->sta)
321 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
e2ebc74d 322
5cf121c3 323 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
c2c98fde 324 if (unlikely(!assoc &&
358c8d9d 325 ieee80211_is_data(hdr->frame_control))) {
e2ebc74d 326#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0
JB		 327 sdata_info(tx->sdata,
328 "dropped data frame to not associated station %pM\n",
329 hdr->addr1);
330#endif
e2ebc74d 331 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
9ae54c84 332 return TX_DROP;
e2ebc74d 333 }
72f15d53
MB		 334 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
335 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
29623892
JB		 336 /*
337 * No associated STAs - no need to send multicast
338 * frames.
339 */
340 return TX_DROP;
e2ebc74d
JB		 341 }
342
9ae54c84 343 return TX_CONTINUE;
e2ebc74d
JB		 344}
345
e2ebc74d
JB		 346/* This function is called whenever the AP is about to exceed the maximum limit
347 * of buffered frames for power saving STAs. This situation should not really
348 * happen often during normal operation, so dropping the oldest buffered packet
349 * from each queue should be OK to make some room for new frames. */
350static void purge_old_ps_buffers(struct ieee80211_local *local)
351{
352 int total = 0, purged = 0;
353 struct sk_buff *skb;
354 struct ieee80211_sub_if_data *sdata;
355 struct sta_info *sta;
356
79010420 357 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 358 struct ps_data *ps;
359
360 if (sdata->vif.type == NL80211_IFTYPE_AP)
361 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 362 else if (ieee80211_vif_is_mesh(&sdata->vif))
363 ps = &sdata->u.mesh.ps;
d012a605 364 else
e2ebc74d 365 continue;
d012a605
MP		 366
367 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 368 if (skb) {
369 purged++;
6b07d9ca 370 ieee80211_free_txskb(&local->hw, skb);
e2ebc74d 371 }
d012a605 372 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 373 }
e2ebc74d 374
948d887d
JB		 375 /*
376 * Drop one frame from each station from the lowest-priority
377 * AC that has frames at all.
378 */
d0709a65 379 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 380 int ac;
381
382 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
383 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
384 total += skb_queue_len(&sta->ps_tx_buf[ac]);
385 if (skb) {
386 purged++;
c3e7724b 387 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 388 break;
389 }
e2ebc74d 390 }
e2ebc74d 391 }
d0709a65 392
e2ebc74d 393 local->total_ps_buffered = total;
bdcbd8e0 394 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 395}
396
9ae54c84 397static ieee80211_tx_result
5cf121c3 398ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 399{
e039fa4a 400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 401 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 402 struct ps_data *ps;
e039fa4a 403
7d54d0dd
JB		 404 /*
405 * broadcast/multicast frame
406 *
3f52b7e3 407 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 408 * the frame is buffered to be sent after DTIM beacon frame.
409 * This is done either by the hardware or us.
410 */
411
3f52b7e3 412 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 413 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
414 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
415 if (!tx->sdata->bss)
416 return TX_CONTINUE;
417
418 ps = &tx->sdata->bss->ps;
3f52b7e3
MP		 419 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
420 ps = &tx->sdata->u.mesh.ps;
d012a605 421 } else {
3e122be0 422 return TX_CONTINUE;
d012a605
MP		 423 }
424
3e122be0
JB		 425
426 /* no buffering for ordered frames */
358c8d9d 427 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 428 return TX_CONTINUE;
7d54d0dd 429
08b99399
JB		 430 if (ieee80211_is_probe_req(hdr->frame_control))
431 return TX_CONTINUE;
432
30686bf7 433 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
f4d57941
JB		 434 info->hw_queue = tx->sdata->vif.cab_queue;
435
7d54d0dd 436 /* no stations in PS mode */
d012a605 437 if (!atomic_read(&ps->num_sta_ps))
9ae54c84 438 return TX_CONTINUE;
7d54d0dd 439
62b517cb 440 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
62b1208e 441
62b517cb 442 /* device releases frame after DTIM beacon */
30686bf7 443 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
62b1208e 444 return TX_CONTINUE;
62b1208e 445
7d54d0dd 446 /* buffered in mac80211 */
62b1208e
JB		 447 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
448 purge_old_ps_buffers(tx->local);
449
d012a605 450 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 451 ps_dbg(tx->sdata,
452 "BC TX buffer full - dropping the oldest frame\n");
6b07d9ca 453 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
62b1208e
JB		 454 } else
455 tx->local->total_ps_buffered++;
e2ebc74d 456
d012a605 457 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 458
62b1208e 459 return TX_QUEUED;
e2ebc74d
JB		 460}
461
fb733336
JM		 462static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
463 struct sk_buff *skb)
464{
465 if (!ieee80211_is_mgmt(fc))
466 return 0;
467
c2c98fde 468 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 469 return 0;
470
d8ca16db 471 if (!ieee80211_is_robust_mgmt_frame(skb))
fb733336
JM		 472 return 0;
473
474 return 1;
475}
476
9ae54c84 477static ieee80211_tx_result
5cf121c3 478ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 479{
480 struct sta_info *sta = tx->sta;
e039fa4a 481 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
08b99399 482 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 483 struct ieee80211_local *local = tx->local;
e2ebc74d 484
02f2f1a9 485 if (unlikely(!sta))
9ae54c84 486 return TX_CONTINUE;
e2ebc74d 487
c2c98fde 488 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
5ac2e350
JB		 489 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
490 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
02f2f1a9 491 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 492 int ac = skb_get_queue_mapping(tx->skb);
493
08b99399
JB		 494 if (ieee80211_is_mgmt(hdr->frame_control) &&
495 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
496 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
497 return TX_CONTINUE;
498 }
499
bdcbd8e0
JB		 500 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
501 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 502 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
503 purge_old_ps_buffers(tx->local);
1d147bfa
EG		 504
505 /* sync with ieee80211_sta_ps_deliver_wakeup */
506 spin_lock(&sta->ps_lock);
507 /*
508 * STA woke up the meantime and all the frames on ps_tx_buf have
509 * been queued to pending queue. No reordering can happen, go
510 * ahead and Tx the packet.
511 */
512 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
5ac2e350
JB		 513 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
514 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
1d147bfa
EG		 515 spin_unlock(&sta->ps_lock);
516 return TX_CONTINUE;
517 }
518
948d887d
JB		 519 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
520 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
bdcbd8e0
JB		 521 ps_dbg(tx->sdata,
522 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
523 sta->sta.addr, ac);
c3e7724b 524 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 525 } else
526 tx->local->total_ps_buffered++;
004c872e 527
e039fa4a 528 info->control.jiffies = jiffies;
5061b0c2 529 info->control.vif = &tx->sdata->vif;
8f77f384 530 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
03c8c06f 531 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
948d887d 532 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
1d147bfa 533 spin_unlock(&sta->ps_lock);
3393a608
JO		 534
535 if (!timer_pending(&local->sta_cleanup))
536 mod_timer(&local->sta_cleanup,
537 round_jiffies(jiffies +
538 STA_INFO_CLEANUP_INTERVAL));
539
c868cb35
JB		 540 /*
541 * We queued up some frames, so the TIM bit might
542 * need to be set, recalculate it.
543 */
544 sta_info_recalc_tim(sta);
545
9ae54c84 546 return TX_QUEUED;
bdcbd8e0
JB		 547 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
548 ps_dbg(tx->sdata,
549 "STA %pM in PS mode, but polling/in SP -> send frame\n",
550 sta->sta.addr);
e2ebc74d 551 }
e2ebc74d 552
9ae54c84 553 return TX_CONTINUE;
e2ebc74d
JB		 554}
555
d9e8a70f 556static ieee80211_tx_result debug_noinline
5cf121c3 557ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 558{
5cf121c3 559 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 560 return TX_CONTINUE;
e2ebc74d 561
5cf121c3 562 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 563 return ieee80211_tx_h_unicast_ps_buf(tx);
564 else
565 return ieee80211_tx_h_multicast_ps_buf(tx);
566}
567
a621fa4d
JB		 568static ieee80211_tx_result debug_noinline
569ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
570{
571 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
572
af61a165
JB		 573 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
574 if (tx->sdata->control_port_no_encrypt)
575 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
576 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
9c1c98a3 577 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
af61a165 578 }
a621fa4d
JB		 579
580 return TX_CONTINUE;
581}
582
d9e8a70f 583static ieee80211_tx_result debug_noinline
5cf121c3 584ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 585{
46e6de15 586 struct ieee80211_key *key;
e039fa4a 587 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 588 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 589
3b8d81e0 590 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
e2ebc74d 591 tx->key = NULL;
2475b1cc
MS		 592 else if (tx->sta &&
593 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
d4e46a3d 594 tx->key = key;
46f6b060
MH		 595 else if (ieee80211_is_group_privacy_action(tx->skb) &&
596 (key = rcu_dereference(tx->sdata->default_multicast_key)))
597 tx->key = key;
3cfcf6ac 598 else if (ieee80211_is_mgmt(hdr->frame_control) &&
ecbcd324 599 is_multicast_ether_addr(hdr->addr1) &&
d8ca16db 600 ieee80211_is_robust_mgmt_frame(tx->skb) &&
3cfcf6ac
JM		 601 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
602 tx->key = key;
f7e0104c
JB		 603 else if (is_multicast_ether_addr(hdr->addr1) &&
604 (key = rcu_dereference(tx->sdata->default_multicast_key)))
605 tx->key = key;
606 else if (!is_multicast_ether_addr(hdr->addr1) &&
607 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 608 tx->key = key;
e8f4fb7c 609 else
4922f71f 610 tx->key = NULL;
e2ebc74d
JB		 611
612 if (tx->key) {
813d7669
JB		 613 bool skip_hw = false;
614
011bfcc4 615 /* TODO: add threshold stuff again */
176e4f84 616
97359d12
JB		 617 switch (tx->key->conf.cipher) {
618 case WLAN_CIPHER_SUITE_WEP40:
619 case WLAN_CIPHER_SUITE_WEP104:
97359d12 620 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 621 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 622 tx->key = NULL;
623 break;
97359d12 624 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db 625 case WLAN_CIPHER_SUITE_CCMP_256:
00b9cfa3
JM		 626 case WLAN_CIPHER_SUITE_GCMP:
627 case WLAN_CIPHER_SUITE_GCMP_256:
fb733336
JM		 628 if (!ieee80211_is_data_present(hdr->frame_control) &&
629 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
46f6b060
MH		 630 tx->skb) &&
631 !ieee80211_is_group_privacy_action(tx->skb))
fb733336 632 tx->key = NULL;
3b43a187
KV		 633 else
634 skip_hw = (tx->key->conf.flags &
e548c49e 635 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 636 ieee80211_is_mgmt(hdr->frame_control);
fb733336 637 break;
97359d12 638 case WLAN_CIPHER_SUITE_AES_CMAC:
56c52da2 639 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
8ade538b
JM		 640 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
641 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3cfcf6ac
JM		 642 if (!ieee80211_is_mgmt(hdr->frame_control))
643 tx->key = NULL;
644 break;
176e4f84 645 }
813d7669 646
e54faf29
JB		 647 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
648 !ieee80211_is_deauth(hdr->frame_control)))
95acac61
JB		 649 return TX_DROP;
650
f12553eb 651 if (!skip_hw && tx->key &&
382b1655 652 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 653 info->control.hw_key = &tx->key->conf;
e2ebc74d
JB		 654 }
655
9ae54c84 656 return TX_CONTINUE;
e2ebc74d
JB		 657}
658
d9e8a70f 659static ieee80211_tx_result debug_noinline
5cf121c3 660ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 661{
e039fa4a 662 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 663 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
664 struct ieee80211_supported_band *sband;
a2c40249 665 u32 len;
e6a9854b 666 struct ieee80211_tx_rate_control txrc;
0d528d85 667 struct ieee80211_sta_rates *ratetbl = NULL;
c2c98fde 668 bool assoc = false;
8318d78a 669
e6a9854b 670 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 671
2d56577b 672 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 673
a2c40249 674 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 675 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 676
677 /* set up the tx rate control struct we give the RC algo */
005e472b 678 txrc.hw = &tx->local->hw;
e6a9854b
JB		 679 txrc.sband = sband;
680 txrc.bss_conf = &tx->sdata->vif.bss_conf;
681 txrc.skb = tx->skb;
682 txrc.reported_rate.idx = -1;
2d56577b 683 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
37eb0b16
JM		 684 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
685 txrc.max_rate_idx = -1;
686 else
687 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
2ffbe6d3
FF		 688
689 if (tx->sdata->rc_has_mcs_mask[info->band])
690 txrc.rate_idx_mcs_mask =
691 tx->sdata->rc_rateidx_mcs_mask[info->band];
692
8f0729b1 693 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 694 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 695 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
696 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 697
698 /* set up RTS protection if desired */
b9a5f8ca 699 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 700 txrc.rts = true;
e2ebc74d 701 }
e2ebc74d 702
0d528d85 703 info->control.use_rts = txrc.rts;
991fec09
FF		 704 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
705
e6a9854b
JB		 706 /*
707 * Use short preamble if the BSS can handle it, but not for
708 * management frames unless we know the receiver can handle
709 * that -- the management frame might be to a station that
710 * just wants a probe response.
711 */
712 if (tx->sdata->vif.bss_conf.use_short_preamble &&
713 (ieee80211_is_data(hdr->frame_control) ||
c2c98fde 714 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 715 txrc.short_preamble = true;
716
717 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 718
dfdfc2be
SE		 719 /* don't ask rate control when rate already injected via radiotap */
720 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
721 return TX_CONTINUE;
722
c2c98fde
JB		 723 if (tx->sta)
724 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 725
726 /*
727 * Lets not bother rate control if we're associated and cannot
728 * talk to the sta. This should not happen.
729 */
c2c98fde 730 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 731 !rate_usable_index_exists(sband, &tx->sta->sta),
732 "%s: Dropped data frame as no usable bitrate found while "
733 "scanning and associated. Target station: "
734 "%pM on %d GHz band\n",
47846c9b 735 tx->sdata->name, hdr->addr1,
2d56577b 736 info->band ? 5 : 2))
b770b43e 737 return TX_DROP;
2e92e6f2 738
b770b43e
LR		 739 /*
740 * If we're associated with the sta at this point we know we can at
741 * least send the frame at the lowest bit rate.
742 */
e6a9854b
JB		 743 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
744
0d528d85
FF		 745 if (tx->sta && !info->control.skip_table)
746 ratetbl = rcu_dereference(tx->sta->sta.rates);
747
748 if (unlikely(info->control.rates[0].idx < 0)) {
749 if (ratetbl) {
750 struct ieee80211_tx_rate rate = {
751 .idx = ratetbl->rate[0].idx,
752 .flags = ratetbl->rate[0].flags,
753 .count = ratetbl->rate[0].count
754 };
755
756 if (ratetbl->rate[0].idx < 0)
757 return TX_DROP;
758
759 tx->rate = rate;
760 } else {
761 return TX_DROP;
762 }
763 } else {
764 tx->rate = info->control.rates[0];
765 }
e6a9854b 766
c1ce5a74 767 if (txrc.reported_rate.idx < 0) {
0d528d85 768 txrc.reported_rate = tx->rate;
c1ce5a74 769 if (tx->sta && ieee80211_is_data(hdr->frame_control))
e5a9f8d0 770 tx->sta->tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 771 } else if (tx->sta)
e5a9f8d0 772 tx->sta->tx_stats.last_rate = txrc.reported_rate;
e039fa4a 773
0d528d85
FF		 774 if (ratetbl)
775 return TX_CONTINUE;
776
e6a9854b
JB		 777 if (unlikely(!info->control.rates[0].count))
778 info->control.rates[0].count = 1;
e2ebc74d 779
9955151d
GS		 780 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
781 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
782 info->control.rates[0].count = 1;
783
e6a9854b
JB		 784 return TX_CONTINUE;
785}
786
ba8c3d6f
FF		 787static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
788{
789 u16 *seq = &sta->tid_seq[tid];
790 __le16 ret = cpu_to_le16(*seq);
791
792 /* Increase the sequence number. */
793 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
794
795 return ret;
796}
797
f591fa5d
JB		 798static ieee80211_tx_result debug_noinline
799ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
800{
801 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
802 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 803 u8 *qc;
804 int tid;
805
25d834e1
JB		 806 /*
807 * Packet injection may want to control the sequence
808 * number, if we have no matching interface then we
809 * neither assign one ourselves nor ask the driver to.
810 */
5061b0c2 811 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 812 return TX_CONTINUE;
813
f591fa5d
JB		 814 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
815 return TX_CONTINUE;
816
817 if (ieee80211_hdrlen(hdr->frame_control) < 24)
818 return TX_CONTINUE;
819
49a59543
JB		 820 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
821 return TX_CONTINUE;
822
94778280
JB		 823 /*
824 * Anything but QoS data that has a sequence number field
825 * (is long enough) gets a sequence number from the global
c4c205f3
BC		 826 * counter. QoS data frames with a multicast destination
827 * also use the global counter (802.11-2012 9.3.2.10).
94778280 828 */
c4c205f3
BC		 829 if (!ieee80211_is_data_qos(hdr->frame_control) ||
830 is_multicast_ether_addr(hdr->addr1)) {
94778280 831 /* driver should assign sequence number */
f591fa5d 832 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 833 /* for pure STA mode without beacons, we can do it */
834 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
835 tx->sdata->sequence_number += 0x10;
79c892b8 836 if (tx->sta)
e5a9f8d0 837 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 838 return TX_CONTINUE;
839 }
840
841 /*
842 * This should be true for injected/management frames only, for
843 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
844 * above since they are not QoS-data frames.
845 */
846 if (!tx->sta)
847 return TX_CONTINUE;
848
849 /* include per-STA, per-TID sequence counter */
850
851 qc = ieee80211_get_qos_ctl(hdr);
852 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
e5a9f8d0 853 tx->sta->tx_stats.msdu[tid]++;
f591fa5d 854
bb42f2d1 855 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
f591fa5d
JB		 856
857 return TX_CONTINUE;
858}
859
252b86c4 860static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 861 struct sk_buff *skb, int hdrlen,
862 int frag_threshold)
863{
252b86c4 864 struct ieee80211_local *local = tx->local;
a1a3fcec 865 struct ieee80211_tx_info *info;
252b86c4 866 struct sk_buff *tmp;
2de8e0d9
JB		 867 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
868 int pos = hdrlen + per_fragm;
869 int rem = skb->len - hdrlen - per_fragm;
870
871 if (WARN_ON(rem < 0))
872 return -EINVAL;
873
252b86c4
JB		 874 /* first fragment was already added to queue by caller */
875
2de8e0d9
JB		 876 while (rem) {
877 int fraglen = per_fragm;
878
879 if (fraglen > rem)
880 fraglen = rem;
881 rem -= fraglen;
882 tmp = dev_alloc_skb(local->tx_headroom +
883 frag_threshold +
2475b1cc 884 tx->sdata->encrypt_headroom +
2de8e0d9
JB		 885 IEEE80211_ENCRYPT_TAILROOM);
886 if (!tmp)
887 return -ENOMEM;
252b86c4
JB		 888
889 __skb_queue_tail(&tx->skbs, tmp);
890
2475b1cc
MS		 891 skb_reserve(tmp,
892 local->tx_headroom + tx->sdata->encrypt_headroom);
893
2de8e0d9
JB		 894 /* copy control information */
895 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 896
897 info = IEEE80211_SKB_CB(tmp);
898 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
899 IEEE80211_TX_CTL_FIRST_FRAGMENT);
900
901 if (rem)
902 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
903
2de8e0d9
JB		 904 skb_copy_queue_mapping(tmp, skb);
905 tmp->priority = skb->priority;
2de8e0d9 906 tmp->dev = skb->dev;
2de8e0d9
JB		 907
908 /* copy header and data */
909 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
910 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
911
912 pos += fraglen;
913 }
914
252b86c4 915 /* adjust first fragment's length */
338f977f 916 skb_trim(skb, hdrlen + per_fragm);
2de8e0d9
JB		 917 return 0;
918}
919
d9e8a70f 920static ieee80211_tx_result debug_noinline
e2454948
JB		 921ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
922{
2de8e0d9
JB		 923 struct sk_buff *skb = tx->skb;
924 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
925 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 926 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 927 int hdrlen;
928 int fragnum;
e2454948 929
252b86c4
JB		 930 /* no matter what happens, tx->skb moves to tx->skbs */
931 __skb_queue_tail(&tx->skbs, skb);
932 tx->skb = NULL;
933
a26eb27a
JB		 934 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
935 return TX_CONTINUE;
936
937 if (tx->local->ops->set_frag_threshold)
e2454948
JB		 938 return TX_CONTINUE;
939
eefce91a
JB		 940 /*
941 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 942 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 943 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 944 */
8b30b1fe 945 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 946 return TX_DROP;
947
065e9605 948 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 949
a26eb27a 950 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 951 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 952 return TX_DROP;
e6a9854b 953
2de8e0d9
JB		 954 /*
955 * Now fragment the frame. This will allocate all the fragments and
956 * chain them (using skb as the first fragment) to skb->next.
957 * During transmission, we will remove the successfully transmitted
958 * fragments from this list. When the low-level driver rejects one
959 * of the fragments then we will simply pretend to accept the skb
960 * but store it away as pending.
961 */
252b86c4 962 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 963 return TX_DROP;
e6a9854b 964
2de8e0d9
JB		 965 /* update duration/seq/flags of fragments */
966 fragnum = 0;
252b86c4
JB		 967
968 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 969 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 970
2de8e0d9
JB		 971 hdr = (void *)skb->data;
972 info = IEEE80211_SKB_CB(skb);
e6a9854b 973
252b86c4 974 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 975 hdr->frame_control |= morefrags;
e6a9854b
JB		 976 /*
977 * No multi-rate retries for fragmented frames, that
978 * would completely throw off the NAV at other STAs.
979 */
980 info->control.rates[1].idx = -1;
981 info->control.rates[2].idx = -1;
982 info->control.rates[3].idx = -1;
e3e1a0bc 983 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 984 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 985 } else {
986 hdr->frame_control &= ~morefrags;
e6a9854b 987 }
2de8e0d9
JB		 988 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
989 fragnum++;
252b86c4 990 }
e2ebc74d 991
9ae54c84 992 return TX_CONTINUE;
e2ebc74d
JB		 993}
994
feff1f2f
JB		 995static ieee80211_tx_result debug_noinline
996ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
997{
252b86c4 998 struct sk_buff *skb;
560d2682 999 int ac = -1;
feff1f2f
JB		 1000
1001 if (!tx->sta)
1002 return TX_CONTINUE;
1003
252b86c4 1004 skb_queue_walk(&tx->skbs, skb) {
560d2682 1005 ac = skb_get_queue_mapping(skb);
e5a9f8d0 1006 tx->sta->tx_stats.bytes[ac] += skb->len;
252b86c4 1007 }
560d2682 1008 if (ac >= 0)
e5a9f8d0 1009 tx->sta->tx_stats.packets[ac]++;
feff1f2f
JB		 1010
1011 return TX_CONTINUE;
1012}
1013
d9e8a70f 1014static ieee80211_tx_result debug_noinline
e2454948
JB		 1015ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1016{
1017 if (!tx->key)
1018 return TX_CONTINUE;
1019
97359d12
JB		 1020 switch (tx->key->conf.cipher) {
1021 case WLAN_CIPHER_SUITE_WEP40:
1022 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1023 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1024 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1025 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1026 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 1027 return ieee80211_crypto_ccmp_encrypt(
1028 tx, IEEE80211_CCMP_MIC_LEN);
1029 case WLAN_CIPHER_SUITE_CCMP_256:
1030 return ieee80211_crypto_ccmp_encrypt(
1031 tx, IEEE80211_CCMP_256_MIC_LEN);
97359d12 1032 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1033 return ieee80211_crypto_aes_cmac_encrypt(tx);
56c52da2
JM		 1034 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1035 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
8ade538b
JM		 1036 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1037 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1038 return ieee80211_crypto_aes_gmac_encrypt(tx);
00b9cfa3
JM		 1039 case WLAN_CIPHER_SUITE_GCMP:
1040 case WLAN_CIPHER_SUITE_GCMP_256:
1041 return ieee80211_crypto_gcmp_encrypt(tx);
3ffc2a90 1042 default:
d32a1028 1043 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1044 }
1045
e2454948
JB		 1046 return TX_DROP;
1047}
1048
d9e8a70f 1049static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1050ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1051{
252b86c4 1052 struct sk_buff *skb;
2de8e0d9
JB		 1053 struct ieee80211_hdr *hdr;
1054 int next_len;
1055 bool group_addr;
03f93c3d 1056
252b86c4 1057 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1058 hdr = (void *) skb->data;
7e0aae47
JM		 1059 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1060 break; /* must not overwrite AID */
252b86c4
JB		 1061 if (!skb_queue_is_last(&tx->skbs, skb)) {
1062 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1063 next_len = next->len;
1064 } else
1065 next_len = 0;
2de8e0d9 1066 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1067
2de8e0d9 1068 hdr->duration_id =
252b86c4
JB		 1069 ieee80211_duration(tx, skb, group_addr, next_len);
1070 }
03f93c3d
JB		 1071
1072 return TX_CONTINUE;
1073}
1074
e2ebc74d
JB		 1075/* actual transmit path */
1076
a622ab72
JB		 1077static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1078 struct sk_buff *skb,
1079 struct ieee80211_tx_info *info,
1080 struct tid_ampdu_tx *tid_tx,
1081 int tid)
1082{
1083 bool queued = false;
285fa695 1084 bool reset_agg_timer = false;
aa454580 1085 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1086
1087 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1088 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1089 reset_agg_timer = true;
0ab33703
JB		 1090 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1091 /*
1092 * nothing -- this aggregation session is being started
1093 * but that might still fail with the driver
1094 */
ba8c3d6f 1095 } else if (!tx->sta->sta.txq[tid]) {
a622ab72
JB		 1096 spin_lock(&tx->sta->lock);
1097 /*
1098 * Need to re-check now, because we may get here
1099 *
1100 * 1) in the window during which the setup is actually
1101 * already done, but not marked yet because not all
1102 * packets are spliced over to the driver pending
1103 * queue yet -- if this happened we acquire the lock
1104 * either before or after the splice happens, but
1105 * need to recheck which of these cases happened.
1106 *
1107 * 2) during session teardown, if the OPERATIONAL bit
1108 * was cleared due to the teardown but the pointer
1109 * hasn't been assigned NULL yet (or we loaded it
1110 * before it was assigned) -- in this case it may
1111 * now be NULL which means we should just let the
1112 * packet pass through because splicing the frames
1113 * back is already done.
1114 */
40b275b6 1115 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1116
1117 if (!tid_tx) {
1118 /* do nothing, let packet pass through */
1119 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1120 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1121 reset_agg_timer = true;
a622ab72
JB		 1122 } else {
1123 queued = true;
f6d4671a
EG		 1124 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1125 clear_sta_flag(tx->sta, WLAN_STA_SP);
1126 ps_dbg(tx->sta->sdata,
1127 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1128 tx->sta->sta.addr, tx->sta->sta.aid);
1129 }
a622ab72
JB		 1130 info->control.vif = &tx->sdata->vif;
1131 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
facde7f3 1132 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
a622ab72 1133 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1134 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1135 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1136 }
1137 spin_unlock(&tx->sta->lock);
aa454580
HS		 1138
1139 if (purge_skb)
c3e7724b 1140 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1141 }
1142
285fa695
NM		 1143 /* reset session timer */
1144 if (reset_agg_timer && tid_tx->timeout)
12d3952f 1145 tid_tx->last_tx = jiffies;
285fa695 1146
a622ab72
JB		 1147 return queued;
1148}
1149
58d4185e
JB		 1150/*
1151 * initialises @tx
7c10770f
JB		 1152 * pass %NULL for the station if unknown, a valid pointer if known
1153 * or an ERR_PTR() if the station is known not to exist
58d4185e 1154 */
9ae54c84 1155static ieee80211_tx_result
3b8d81e0
JB		 1156ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1157 struct ieee80211_tx_data *tx,
7c10770f 1158 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1159{
3b8d81e0 1160 struct ieee80211_local *local = sdata->local;
58d4185e 1161 struct ieee80211_hdr *hdr;
e039fa4a 1162 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1163 int tid;
a622ab72 1164 u8 *qc;
e2ebc74d
JB		 1165
1166 memset(tx, 0, sizeof(*tx));
1167 tx->skb = skb;
e2ebc74d 1168 tx->local = local;
3b8d81e0 1169 tx->sdata = sdata;
252b86c4 1170 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1171
cd8ffc80
JB		 1172 /*
1173 * If this flag is set to true anywhere, and we get here,
1174 * we are doing the needed processing, so remove the flag
1175 * now.
1176 */
1177 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1178
58d4185e
JB		 1179 hdr = (struct ieee80211_hdr *) skb->data;
1180
7c10770f
JB		 1181 if (likely(sta)) {
1182 if (!IS_ERR(sta))
1183 tx->sta = sta;
1184 } else {
1185 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1186 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1187 if (!tx->sta && sdata->wdev.use_4addr)
1188 return TX_DROP;
1189 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1190 IEEE80211_TX_CTL_INJECTED) ||
1191 tx->sdata->control_port_protocol == tx->skb->protocol) {
1192 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1193 }
1194 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1195 tx->sta = sta_info_get(sdata, hdr->addr1);
3f0e0b22 1196 }
58d4185e 1197
cd8ffc80 1198 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1199 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1200 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1201 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1202 struct tid_ampdu_tx *tid_tx;
1203
8b30b1fe
S		 1204 qc = ieee80211_get_qos_ctl(hdr);
1205 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1206
a622ab72
JB		 1207 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1208 if (tid_tx) {
1209 bool queued;
cd8ffc80 1210
a622ab72
JB		 1211 queued = ieee80211_tx_prep_agg(tx, skb, info,
1212 tid_tx, tid);
1213
1214 if (unlikely(queued))
1215 return TX_QUEUED;
1216 }
8b30b1fe
S		 1217 }
1218
badffb72 1219 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1220 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1221 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1222 } else
5cf121c3 1223 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1224
a26eb27a
JB		 1225 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1226 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1227 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1228 info->flags & IEEE80211_TX_CTL_AMPDU)
1229 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1230 }
1231
e2ebc74d 1232 if (!tx->sta)
e039fa4a 1233 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1234 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1235 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1236 ieee80211_check_fast_xmit(tx->sta);
1237 }
58d4185e 1238
e039fa4a 1239 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1240
9ae54c84 1241 return TX_CONTINUE;
e2ebc74d
JB		 1242}
1243
80a83cfc
MK		 1244static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1245 struct ieee80211_vif *vif,
1246 struct ieee80211_sta *pubsta,
1247 struct sk_buff *skb)
ba8c3d6f
FF		 1248{
1249 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ba8c3d6f 1250 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ba8c3d6f 1251 struct ieee80211_txq *txq = NULL;
ba8c3d6f 1252
c3732a7b
FF		 1253 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1254 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
80a83cfc 1255 return NULL;
ba8c3d6f
FF		 1256
1257 if (!ieee80211_is_data(hdr->frame_control))
80a83cfc 1258 return NULL;
ba8c3d6f
FF		 1259
1260 if (pubsta) {
1261 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1262
1263 txq = pubsta->txq[tid];
1264 } else if (vif) {
1265 txq = vif->txq;
1266 }
1267
1268 if (!txq)
80a83cfc 1269 return NULL;
ba8c3d6f 1270
80a83cfc
MK		 1271 return to_txq_info(txq);
1272}
ba8c3d6f 1273
5caa328e
MK		 1274static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1275{
1276 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1277}
1278
1279static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
1280{
1281 IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
1282}
1283
1284static u32 codel_skb_len_func(const struct sk_buff *skb)
1285{
1286 return skb->len;
1287}
1288
1289static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1290{
1291 const struct ieee80211_tx_info *info;
1292
1293 info = (const struct ieee80211_tx_info *)skb->cb;
1294 return info->control.enqueue_time;
1295}
1296
1297static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1298 void *ctx)
1299{
1300 struct ieee80211_local *local;
1301 struct txq_info *txqi;
1302 struct fq *fq;
1303 struct fq_flow *flow;
1304
1305 txqi = ctx;
1306 local = vif_to_sdata(txqi->txq.vif)->local;
1307 fq = &local->fq;
1308
1309 if (cvars == &txqi->def_cvars)
1310 flow = &txqi->def_flow;
1311 else
1312 flow = &fq->flows[cvars - local->cvars];
1313
1314 return fq_flow_dequeue(fq, flow);
1315}
1316
1317static void codel_drop_func(struct sk_buff *skb,
1318 void *ctx)
1319{
1320 struct ieee80211_local *local;
1321 struct ieee80211_hw *hw;
1322 struct txq_info *txqi;
1323
1324 txqi = ctx;
1325 local = vif_to_sdata(txqi->txq.vif)->local;
1326 hw = &local->hw;
1327
1328 ieee80211_free_txskb(hw, skb);
1329}
1330
fa962b92
MK		 1331static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1332 struct fq_tin *tin,
1333 struct fq_flow *flow)
1334{
5caa328e
MK		 1335 struct ieee80211_local *local;
1336 struct txq_info *txqi;
1337 struct codel_vars *cvars;
1338 struct codel_params *cparams;
1339 struct codel_stats *cstats;
1340
1341 local = container_of(fq, struct ieee80211_local, fq);
1342 txqi = container_of(tin, struct txq_info, tin);
1343 cparams = &local->cparams;
8d51dbb8 1344 cstats = &txqi->cstats;
5caa328e
MK		 1345
1346 if (flow == &txqi->def_flow)
1347 cvars = &txqi->def_cvars;
1348 else
1349 cvars = &local->cvars[flow - fq->flows];
1350
1351 return codel_dequeue(txqi,
1352 &flow->backlog,
1353 cparams,
1354 cvars,
1355 cstats,
1356 codel_skb_len_func,
1357 codel_skb_time_func,
1358 codel_drop_func,
1359 codel_dequeue_func);
fa962b92
MK		 1360}
1361
1362static void fq_skb_free_func(struct fq *fq,
1363 struct fq_tin *tin,
1364 struct fq_flow *flow,
1365 struct sk_buff *skb)
1366{
1367 struct ieee80211_local *local;
1368
1369 local = container_of(fq, struct ieee80211_local, fq);
1370 ieee80211_free_txskb(&local->hw, skb);
1371}
1372
1373static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1374 struct fq_tin *tin,
1375 int idx,
1376 struct sk_buff *skb)
1377{
1378 struct txq_info *txqi;
1379
1380 txqi = container_of(tin, struct txq_info, tin);
1381 return &txqi->def_flow;
1382}
1383
80a83cfc
MK		 1384static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1385 struct txq_info *txqi,
1386 struct sk_buff *skb)
1387{
fa962b92
MK		 1388 struct fq *fq = &local->fq;
1389 struct fq_tin *tin = &txqi->tin;
f2ac7e30 1390
5caa328e 1391 ieee80211_set_skb_enqueue_time(skb);
fa962b92
MK		 1392 fq_tin_enqueue(fq, tin, skb,
1393 fq_skb_free_func,
1394 fq_flow_get_default_func);
1395}
ba8c3d6f 1396
fa962b92
MK		 1397void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1398 struct sta_info *sta,
1399 struct txq_info *txqi, int tid)
1400{
1401 fq_tin_init(&txqi->tin);
1402 fq_flow_init(&txqi->def_flow);
5caa328e 1403 codel_vars_init(&txqi->def_cvars);
8d51dbb8 1404 codel_stats_init(&txqi->cstats);
bb42f2d1 1405 __skb_queue_head_init(&txqi->frags);
fa962b92
MK		 1406
1407 txqi->txq.vif = &sdata->vif;
1408
1409 if (sta) {
1410 txqi->txq.sta = &sta->sta;
1411 sta->sta.txq[tid] = &txqi->txq;
1412 txqi->txq.tid = tid;
1413 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
1414 } else {
1415 sdata->vif.txq = &txqi->txq;
1416 txqi->txq.tid = 0;
1417 txqi->txq.ac = IEEE80211_AC_BE;
80a83cfc 1418 }
fa962b92 1419}
ba8c3d6f 1420
fa962b92
MK		 1421void ieee80211_txq_purge(struct ieee80211_local *local,
1422 struct txq_info *txqi)
1423{
1424 struct fq *fq = &local->fq;
1425 struct fq_tin *tin = &txqi->tin;
1426
1427 fq_tin_reset(fq, tin, fq_skb_free_func);
bb42f2d1 1428 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
fa962b92
MK		 1429}
1430
1431int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1432{
1433 struct fq *fq = &local->fq;
1434 int ret;
5caa328e 1435 int i;
3ff23cd5
THJ		 1436 bool supp_vht = false;
1437 enum nl80211_band band;
fa962b92
MK		 1438
1439 if (!local->ops->wake_tx_queue)
1440 return 0;
1441
1442 ret = fq_init(fq, 4096);
1443 if (ret)
1444 return ret;
1445
3ff23cd5
THJ		 1446 /*
1447 * If the hardware doesn't support VHT, it is safe to limit the maximum
1448 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1449 */
1450 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1451 struct ieee80211_supported_band *sband;
1452
1453 sband = local->hw.wiphy->bands[band];
1454 if (!sband)
1455 continue;
1456
1457 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1458 }
1459
1460 if (!supp_vht)
1461 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1462
5caa328e 1463 codel_params_init(&local->cparams);
5caa328e
MK		 1464 local->cparams.interval = MS2TIME(100);
1465 local->cparams.target = MS2TIME(20);
1466 local->cparams.ecn = true;
1467
1468 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1469 GFP_KERNEL);
1470 if (!local->cvars) {
59a7c828 1471 spin_lock_bh(&fq->lock);
5caa328e 1472 fq_reset(fq, fq_skb_free_func);
59a7c828 1473 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1474 return -ENOMEM;
1475 }
1476
1477 for (i = 0; i < fq->flows_cnt; i++)
1478 codel_vars_init(&local->cvars[i]);
1479
fa962b92
MK		 1480 return 0;
1481}
1482
1483void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1484{
1485 struct fq *fq = &local->fq;
1486
1487 if (!local->ops->wake_tx_queue)
1488 return;
1489
5caa328e
MK		 1490 kfree(local->cvars);
1491 local->cvars = NULL;
1492
59a7c828 1493 spin_lock_bh(&fq->lock);
fa962b92 1494 fq_reset(fq, fq_skb_free_func);
59a7c828 1495 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1496}
1497
bb42f2d1
THJ		 1498static bool ieee80211_queue_skb(struct ieee80211_local *local,
1499 struct ieee80211_sub_if_data *sdata,
1500 struct sta_info *sta,
1501 struct sk_buff *skb)
1502{
1503 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1504 struct fq *fq = &local->fq;
1505 struct ieee80211_vif *vif;
1506 struct txq_info *txqi;
1507 struct ieee80211_sta *pubsta;
1508
1509 if (!local->ops->wake_tx_queue ||
1510 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1511 return false;
1512
1513 if (sta && sta->uploaded)
1514 pubsta = &sta->sta;
1515 else
1516 pubsta = NULL;
1517
1518 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1519 sdata = container_of(sdata->bss,
1520 struct ieee80211_sub_if_data, u.ap);
1521
1522 vif = &sdata->vif;
1523 txqi = ieee80211_get_txq(local, vif, pubsta, skb);
1524
1525 if (!txqi)
1526 return false;
1527
1528 info->control.vif = vif;
1529
1530 spin_lock_bh(&fq->lock);
1531 ieee80211_txq_enqueue(local, txqi, skb);
1532 spin_unlock_bh(&fq->lock);
1533
1534 drv_wake_tx_queue(local, txqi);
1535
1536 return true;
1537}
1538
11127e91
JB		 1539static bool ieee80211_tx_frags(struct ieee80211_local *local,
1540 struct ieee80211_vif *vif,
1541 struct ieee80211_sta *sta,
1542 struct sk_buff_head *skbs,
1543 bool txpending)
e2ebc74d 1544{
80a83cfc 1545 struct ieee80211_tx_control control = {};
252b86c4 1546 struct sk_buff *skb, *tmp;
3b8d81e0 1547 unsigned long flags;
e2ebc74d 1548
252b86c4 1549 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1550 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1551 int q = info->hw_queue;
1552
1553#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1554 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1555 __skb_unlink(skb, skbs);
c3e7724b 1556 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1557 continue;
1558 }
1559#endif
3b8d81e0
JB		 1560
1561 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1562 if (local->queue_stop_reasons[q] ||
7bb45683 1563 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1564 if (unlikely(info->flags &
a7679ed5
SF		 1565 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1566 if (local->queue_stop_reasons[q] &
1567 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1568 /*
1569 * Drop off-channel frames if queues
1570 * are stopped for any reason other
1571 * than off-channel operation. Never
1572 * queue them.
1573 */
1574 spin_unlock_irqrestore(
1575 &local->queue_stop_reason_lock,
1576 flags);
1577 ieee80211_purge_tx_queue(&local->hw,
1578 skbs);
1579 return true;
1580 }
1581 } else {
1582
6c17b77b 1583 /*
a7679ed5
SF		 1584 * Since queue is stopped, queue up frames for
1585 * later transmission from the tx-pending
1586 * tasklet when the queue is woken again.
6c17b77b 1587 */
a7679ed5
SF		 1588 if (txpending)
1589 skb_queue_splice_init(skbs,
1590 &local->pending[q]);
1591 else
1592 skb_queue_splice_tail_init(skbs,
1593 &local->pending[q]);
1594
1595 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1596 flags);
1597 return false;
6c17b77b 1598 }
7bb45683 1599 }
3b8d81e0 1600 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1601
11127e91 1602 info->control.vif = vif;
80a83cfc 1603 control.sta = sta;
f0e72851 1604
11127e91 1605 __skb_unlink(skb, skbs);
80a83cfc 1606 drv_tx(local, &control, skb);
11127e91 1607 }
5061b0c2 1608
11127e91
JB		 1609 return true;
1610}
1611
1612/*
1613 * Returns false if the frame couldn't be transmitted but was queued instead.
1614 */
1615static bool __ieee80211_tx(struct ieee80211_local *local,
1616 struct sk_buff_head *skbs, int led_len,
1617 struct sta_info *sta, bool txpending)
1618{
1619 struct ieee80211_tx_info *info;
1620 struct ieee80211_sub_if_data *sdata;
1621 struct ieee80211_vif *vif;
1622 struct ieee80211_sta *pubsta;
1623 struct sk_buff *skb;
1624 bool result = true;
1625 __le16 fc;
5061b0c2 1626
11127e91
JB		 1627 if (WARN_ON(skb_queue_empty(skbs)))
1628 return true;
ec25acc4 1629
11127e91
JB		 1630 skb = skb_peek(skbs);
1631 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1632 info = IEEE80211_SKB_CB(skb);
1633 sdata = vif_to_sdata(info->control.vif);
1634 if (sta && !sta->uploaded)
1635 sta = NULL;
1636
1637 if (sta)
1638 pubsta = &sta->sta;
1639 else
1640 pubsta = NULL;
1641
1642 switch (sdata->vif.type) {
1643 case NL80211_IFTYPE_MONITOR:
d8212184 1644 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
c82b5a74
JB		 1645 vif = &sdata->vif;
1646 break;
1647 }
4b6f1dd6 1648 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1649 if (sdata) {
4b6f1dd6 1650 vif = &sdata->vif;
3a25a8c8
JB		 1651 info->hw_queue =
1652 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1653 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1654 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1655 return true;
1656 } else
4b6f1dd6 1657 vif = NULL;
11127e91
JB		 1658 break;
1659 case NL80211_IFTYPE_AP_VLAN:
1660 sdata = container_of(sdata->bss,
1661 struct ieee80211_sub_if_data, u.ap);
1662 /* fall through */
1663 default:
1664 vif = &sdata->vif;
1665 break;
e2ebc74d 1666 }
2de8e0d9 1667
cb831b53
JB		 1668 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1669 txpending);
11127e91 1670
74e4dbfd 1671 ieee80211_tpt_led_trig_tx(local, fc, led_len);
74e4dbfd 1672
4db4e0a1 1673 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1674
11127e91 1675 return result;
e2ebc74d
JB		 1676}
1677
97b045d6
JB		 1678/*
1679 * Invoke TX handlers, return 0 on success and non-zero if the
1680 * frame was dropped or queued.
bb42f2d1
THJ		 1681 *
1682 * The handlers are split into an early and late part. The latter is everything
1683 * that can be sensitive to reordering, and will be deferred to after packets
1684 * are dequeued from the intermediate queues (when they are enabled).
97b045d6 1685 */
bb42f2d1 1686static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
97b045d6 1687{
97b045d6 1688 ieee80211_tx_result res = TX_DROP;
97b045d6 1689
9aa4aee3
JB		 1690#define CALL_TXH(txh) \
1691 do { \
1692 res = txh(tx); \
1693 if (res != TX_CONTINUE) \
1694 goto txh_done; \
1695 } while (0)
1696
5c1b98a5 1697 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1698 CALL_TXH(ieee80211_tx_h_check_assoc);
1699 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1700 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1701 CALL_TXH(ieee80211_tx_h_select_key);
30686bf7 1702 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
af65cd96 1703 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1704
bb42f2d1
THJ		 1705 txh_done:
1706 if (unlikely(res == TX_DROP)) {
1707 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1708 if (tx->skb)
1709 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1710 else
1711 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1712 return -1;
1713 } else if (unlikely(res == TX_QUEUED)) {
1714 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1715 return -1;
1716 }
1717
1718 return 0;
1719}
1720
1721/*
1722 * Late handlers can be called while the sta lock is held. Handlers that can
1723 * cause packets to be generated will cause deadlock!
1724 */
1725static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1726{
1727 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1728 ieee80211_tx_result res = TX_CONTINUE;
1729
aa5b5492
JB		 1730 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1731 __skb_queue_tail(&tx->skbs, tx->skb);
1732 tx->skb = NULL;
c6fcf6bc 1733 goto txh_done;
aa5b5492 1734 }
c6fcf6bc
JB		 1735
1736 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1737 CALL_TXH(ieee80211_tx_h_sequence);
1738 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1739 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1740 CALL_TXH(ieee80211_tx_h_stats);
1741 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1742 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1743 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1744#undef CALL_TXH
97b045d6 1745
d9e8a70f 1746 txh_done:
97b045d6 1747 if (unlikely(res == TX_DROP)) {
5479d0e7 1748 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1749 if (tx->skb)
c3e7724b 1750 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1751 else
1f98ab7f 1752 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1753 return -1;
1754 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1755 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1756 return -1;
1757 }
1758
1759 return 0;
1760}
1761
bb42f2d1
THJ		 1762static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1763{
1764 int r = invoke_tx_handlers_early(tx);
1765
1766 if (r)
1767 return r;
1768 return invoke_tx_handlers_late(tx);
1769}
1770
06be6b14
FF		 1771bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1772 struct ieee80211_vif *vif, struct sk_buff *skb,
1773 int band, struct ieee80211_sta **sta)
1774{
1775 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1776 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1777 struct ieee80211_tx_data tx;
88724a81 1778 struct sk_buff *skb2;
06be6b14 1779
7c10770f 1780 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1781 return false;
1782
1783 info->band = band;
1784 info->control.vif = vif;
1785 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1786
1787 if (invoke_tx_handlers(&tx))
1788 return false;
1789
1790 if (sta) {
1791 if (tx.sta)
1792 *sta = &tx.sta->sta;
1793 else
1794 *sta = NULL;
1795 }
1796
88724a81
JB		 1797 /* this function isn't suitable for fragmented data frames */
1798 skb2 = __skb_dequeue(&tx.skbs);
1799 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1800 ieee80211_free_txskb(hw, skb2);
1801 ieee80211_purge_tx_queue(hw, &tx.skbs);
1802 return false;
1803 }
1804
06be6b14
FF		 1805 return true;
1806}
1807EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1808
7bb45683
JB		 1809/*
1810 * Returns false if the frame couldn't be transmitted but was queued instead.
1811 */
1812static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f
JB		 1813 struct sta_info *sta, struct sk_buff *skb,
1814 bool txpending)
e2ebc74d 1815{
3b8d81e0 1816 struct ieee80211_local *local = sdata->local;
5cf121c3 1817 struct ieee80211_tx_data tx;
97b045d6 1818 ieee80211_tx_result res_prepare;
e039fa4a 1819 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1820 bool result = true;
74e4dbfd 1821 int led_len;
e2ebc74d 1822
e2ebc74d
JB		 1823 if (unlikely(skb->len < 10)) {
1824 dev_kfree_skb(skb);
7bb45683 1825 return true;
e2ebc74d
JB		 1826 }
1827
58d4185e 1828 /* initialises tx */
74e4dbfd 1829 led_len = skb->len;
7c10770f 1830 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1831
cd8ffc80 1832 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1833 ieee80211_free_txskb(&local->hw, skb);
55de908a 1834 return true;
cd8ffc80 1835 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1836 return true;
e2ebc74d
JB		 1837 }
1838
3a25a8c8
JB		 1839 /* set up hw_queue value early */
1840 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1841 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1842 info->hw_queue =
1843 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1844
bb42f2d1
THJ		 1845 if (invoke_tx_handlers_early(&tx))
1846 return false;
1847
1848 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1849 return true;
1850
1851 if (!invoke_tx_handlers_late(&tx))
74e4dbfd
JB		 1852 result = __ieee80211_tx(local, &tx.skbs, led_len,
1853 tx.sta, txpending);
55de908a 1854
7bb45683 1855 return result;
e2ebc74d
JB		 1856}
1857
1858/* device xmit handlers */
1859
3bff1865 1860static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1861 struct sk_buff *skb,
1862 int head_need, bool may_encrypt)
1863{
3bff1865 1864 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1865 int tail_need = 0;
1866
3bff1865 1867 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1868 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1869 tail_need -= skb_tailroom(skb);
1870 tail_need = max_t(int, tail_need, 0);
1871 }
1872
c70f59a2 1873 if (skb_cloned(skb) &&
30686bf7 1874 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
c70f59a2 1875 !skb_clone_writable(skb, ETH_HLEN) ||
17c18bf8 1876 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
23c0752a 1877 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1878 else if (head_need || tail_need)
23c0752a 1879 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1880 else
1881 return 0;
23c0752a
JB		 1882
1883 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1884 wiphy_debug(local->hw.wiphy,
1885 "failed to reallocate TX buffer\n");
23c0752a
JB		 1886 return -ENOMEM;
1887 }
1888
23c0752a
JB		 1889 return 0;
1890}
1891
7c10770f
JB		 1892void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1893 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1894{
3b8d81e0 1895 struct ieee80211_local *local = sdata->local;
e039fa4a 1896 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e32f85f7 1897 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 1898 int headroom;
23c0752a 1899 bool may_encrypt;
e2ebc74d 1900
3b8d81e0 1901 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1902
3b8d81e0 1903 headroom = local->tx_headroom;
23c0752a 1904 if (may_encrypt)
2475b1cc 1905 headroom += sdata->encrypt_headroom;
23c0752a
JB		 1906 headroom -= skb_headroom(skb);
1907 headroom = max_t(int, 0, headroom);
1908
3bff1865 1909 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1910 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1911 return;
e2ebc74d
JB		 1912 }
1913
740c1aa3 1914 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1915 info->control.vif = &sdata->vif;
e2ebc74d 1916
3f52b7e3
MP		 1917 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1918 if (ieee80211_is_data(hdr->frame_control) &&
1919 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1920 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1921 return; /* skb queued: don't free */
1922 } else {
1923 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1924 }
98aed9fd 1925 }
cca89496 1926
2154c81c 1927 ieee80211_set_qos_hdr(sdata, skb);
7c10770f 1928 ieee80211_tx(sdata, sta, skb, false);
e2ebc74d
JB		 1929}
1930
dfdfc2be
SE		 1931static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1932 struct sk_buff *skb)
73b9f03a
JB		 1933{
1934 struct ieee80211_radiotap_iterator iterator;
1935 struct ieee80211_radiotap_header *rthdr =
1936 (struct ieee80211_radiotap_header *) skb->data;
1937 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
dfdfc2be
SE		 1938 struct ieee80211_supported_band *sband =
1939 local->hw.wiphy->bands[info->band];
73b9f03a
JB		 1940 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1941 NULL);
1942 u16 txflags;
dfdfc2be
SE		 1943 u16 rate = 0;
1944 bool rate_found = false;
1945 u8 rate_retries = 0;
1946 u16 rate_flags = 0;
f66b60f6 1947 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 1948 u16 vht_known;
1949 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 1950 int i;
73b9f03a
JB		 1951
1952 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1953 IEEE80211_TX_CTL_DONTFRAG;
1954
1955 /*
1956 * for every radiotap entry that is present
1957 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1958 * entries present, or -EINVAL on error)
1959 */
1960
1961 while (!ret) {
1962 ret = ieee80211_radiotap_iterator_next(&iterator);
1963
1964 if (ret)
1965 continue;
1966
1967 /* see if this argument is something we can use */
1968 switch (iterator.this_arg_index) {
1969 /*
1970 * You must take care when dereferencing iterator.this_arg
1971 * for multibyte types... the pointer is not aligned. Use
1972 * get_unaligned((type *)iterator.this_arg) to dereference
1973 * iterator.this_arg for type "type" safely on all arches.
1974 */
1975 case IEEE80211_RADIOTAP_FLAGS:
1976 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1977 /*
1978 * this indicates that the skb we have been
1979 * handed has the 32-bit FCS CRC at the end...
1980 * we should react to that by snipping it off
1981 * because it will be recomputed and added
1982 * on transmission
1983 */
1984 if (skb->len < (iterator._max_length + FCS_LEN))
1985 return false;
1986
1987 skb_trim(skb, skb->len - FCS_LEN);
1988 }
1989 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1990 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1991 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1992 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1993 break;
1994
1995 case IEEE80211_RADIOTAP_TX_FLAGS:
1996 txflags = get_unaligned_le16(iterator.this_arg);
1997 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1998 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1999 break;
2000
dfdfc2be
SE		 2001 case IEEE80211_RADIOTAP_RATE:
2002 rate = *iterator.this_arg;
2003 rate_flags = 0;
2004 rate_found = true;
2005 break;
2006
2007 case IEEE80211_RADIOTAP_DATA_RETRIES:
2008 rate_retries = *iterator.this_arg;
2009 break;
2010
2011 case IEEE80211_RADIOTAP_MCS:
2012 mcs_known = iterator.this_arg[0];
2013 mcs_flags = iterator.this_arg[1];
2014 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2015 break;
2016
2017 rate_found = true;
2018 rate = iterator.this_arg[2];
2019 rate_flags = IEEE80211_TX_RC_MCS;
2020
2021 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2022 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2023 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2024
f66b60f6 2025 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 2026 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 2027 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be
SE		 2028 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2029 break;
2030
646e76bb
LB		 2031 case IEEE80211_RADIOTAP_VHT:
2032 vht_known = get_unaligned_le16(iterator.this_arg);
2033 rate_found = true;
2034
2035 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2036 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2037 (iterator.this_arg[2] &
2038 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2039 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2040 if (vht_known &
2041 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2042 if (iterator.this_arg[3] == 1)
2043 rate_flags |=
2044 IEEE80211_TX_RC_40_MHZ_WIDTH;
2045 else if (iterator.this_arg[3] == 4)
2046 rate_flags |=
2047 IEEE80211_TX_RC_80_MHZ_WIDTH;
2048 else if (iterator.this_arg[3] == 11)
2049 rate_flags |=
2050 IEEE80211_TX_RC_160_MHZ_WIDTH;
2051 }
2052
2053 vht_mcs = iterator.this_arg[4] >> 4;
2054 vht_nss = iterator.this_arg[4] & 0xF;
2055 break;
2056
73b9f03a
JB		 2057 /*
2058 * Please update the file
2059 * Documentation/networking/mac80211-injection.txt
2060 * when parsing new fields here.
2061 */
2062
2063 default:
2064 break;
2065 }
2066 }
2067
2068 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2069 return false;
2070
dfdfc2be
SE		 2071 if (rate_found) {
2072 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2073
2074 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2075 info->control.rates[i].idx = -1;
2076 info->control.rates[i].flags = 0;
2077 info->control.rates[i].count = 0;
2078 }
2079
2080 if (rate_flags & IEEE80211_TX_RC_MCS) {
2081 info->control.rates[0].idx = rate;
646e76bb
LB		 2082 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2083 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2084 vht_nss);
dfdfc2be
SE		 2085 } else {
2086 for (i = 0; i < sband->n_bitrates; i++) {
2087 if (rate * 5 != sband->bitrates[i].bitrate)
2088 continue;
2089
2090 info->control.rates[0].idx = i;
2091 break;
2092 }
2093 }
2094
07310a63
FF		 2095 if (info->control.rates[0].idx < 0)
2096 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2097
dfdfc2be
SE		 2098 info->control.rates[0].flags = rate_flags;
2099 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2100 local->hw.max_rate_tries);
2101 }
2102
73b9f03a
JB		 2103 /*
2104 * remove the radiotap header
2105 * iterator->_max_length was sanity-checked against
2106 * skb->len by iterator init
2107 */
2108 skb_pull(skb, iterator._max_length);
2109
2110 return true;
2111}
2112
d0cf9c0d
SH		 2113netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2114 struct net_device *dev)
e2ebc74d
JB		 2115{
2116 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2117 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d
JB		 2118 struct ieee80211_radiotap_header *prthdr =
2119 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 2120 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2121 struct ieee80211_hdr *hdr;
5d9cf4a5 2122 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2123 struct cfg80211_chan_def *chandef;
9b8a74e3 2124 u16 len_rthdr;
5d9cf4a5 2125 int hdrlen;
e2ebc74d 2126
9b8a74e3
AG		 2127 /* check for not even having the fixed radiotap header part */
2128 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2129 goto fail; /* too short to be possibly valid */
2130
2131 /* is it a header version we can trust to find length from? */
2132 if (unlikely(prthdr->it_version))
2133 goto fail; /* only version 0 is supported */
2134
2135 /* then there must be a radiotap header with a length we can use */
2136 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2137
2138 /* does the skb contain enough to deliver on the alleged length? */
2139 if (unlikely(skb->len < len_rthdr))
2140 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 2141
e2ebc74d
JB		 2142 /*
2143 * fix up the pointers accounting for the radiotap
2144 * header still being in there. We are being given
2145 * a precooked IEEE80211 header so no need for
2146 * normal processing
2147 */
9b8a74e3 2148 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2149 /*
9b8a74e3
AG		 2150 * these are just fixed to the end of the rt area since we
2151 * don't have any better information and at this point, nobody cares
e2ebc74d 2152 */
9b8a74e3
AG		 2153 skb_set_network_header(skb, len_rthdr);
2154 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2155
5d9cf4a5
JB		 2156 if (skb->len < len_rthdr + 2)
2157 goto fail;
2158
2159 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2160 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2161
2162 if (skb->len < len_rthdr + hdrlen)
2163 goto fail;
2164
f75f5c6f
HS		 2165 /*
2166 * Initialize skb->protocol if the injected frame is a data frame
2167 * carrying a rfc1042 header
2168 */
5d9cf4a5
JB		 2169 if (ieee80211_is_data(hdr->frame_control) &&
2170 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2171 u8 *payload = (u8 *)hdr + hdrlen;
2172
b203ca39 2173 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2174 skb->protocol = cpu_to_be16((payload[6] << 8) |
2175 payload[7]);
f75f5c6f
HS		 2176 }
2177
3b8d81e0
JB		 2178 memset(info, 0, sizeof(*info));
2179
5d9cf4a5 2180 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 2181 IEEE80211_TX_CTL_INJECTED;
2182
5d9cf4a5
JB		 2183 rcu_read_lock();
2184
2185 /*
2186 * We process outgoing injected frames that have a local address
2187 * we handle as though they are non-injected frames.
2188 * This code here isn't entirely correct, the local MAC address
2189 * isn't always enough to find the interface to use; for proper
2190 * VLAN/WDS support we will need a different mechanism (which
2191 * likely isn't going to be monitor interfaces).
2192 */
2193 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2194
2195 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2196 if (!ieee80211_sdata_running(tmp_sdata))
2197 continue;
2198 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2199 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2200 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2201 continue;
b203ca39 2202 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2203 sdata = tmp_sdata;
2204 break;
2205 }
2206 }
7351c6bd 2207
55de908a
JB		 2208 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2209 if (!chanctx_conf) {
2210 tmp_sdata = rcu_dereference(local->monitor_sdata);
2211 if (tmp_sdata)
2212 chanctx_conf =
2213 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2214 }
55de908a 2215
b4a7ff75 2216 if (chanctx_conf)
b4932836 2217 chandef = &chanctx_conf->def;
b4a7ff75 2218 else if (!local->use_chanctx)
b4932836 2219 chandef = &local->_oper_chandef;
b4a7ff75
FF		 2220 else
2221 goto fail_rcu;
55de908a
JB		 2222
2223 /*
2224 * Frame injection is not allowed if beaconing is not allowed
2225 * or if we need radar detection. Beaconing is usually not allowed when
2226 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2227 * Passive scan is also used in world regulatory domains where
2228 * your country is not known and as such it should be treated as
2229 * NO TX unless the channel is explicitly allowed in which case
2230 * your current regulatory domain would not have the passive scan
2231 * flag.
2232 *
2233 * Since AP mode uses monitor interfaces to inject/TX management
2234 * frames we can make AP mode the exception to this rule once it
2235 * supports radar detection as its implementation can deal with
2236 * radar detection by itself. We can do that later by adding a
2237 * monitor flag interfaces used for AP support.
2238 */
b4932836
JD		 2239 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2240 sdata->vif.type))
55de908a
JB		 2241 goto fail_rcu;
2242
73c4e195 2243 info->band = chandef->chan->band;
109843b0
LB		 2244
2245 /* process and remove the injection radiotap header */
2246 if (!ieee80211_parse_tx_radiotap(local, skb))
2247 goto fail_rcu;
2248
7c10770f 2249 ieee80211_xmit(sdata, NULL, skb);
5d9cf4a5
JB		 2250 rcu_read_unlock();
2251
e2ebc74d 2252 return NETDEV_TX_OK;
9b8a74e3 2253
55de908a
JB		 2254fail_rcu:
2255 rcu_read_unlock();
9b8a74e3
AG		 2256fail:
2257 dev_kfree_skb(skb);
2258 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2259}
2260
97ffe757 2261static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2262{
97ffe757 2263 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2264
97ffe757
JB		 2265 return ethertype == ETH_P_TDLS &&
2266 skb->len > 14 &&
2267 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2268}
2269
2270static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2271 struct sk_buff *skb,
2272 struct sta_info **sta_out)
2273{
2274 struct sta_info *sta;
2275
2276 switch (sdata->vif.type) {
2277 case NL80211_IFTYPE_AP_VLAN:
2278 sta = rcu_dereference(sdata->u.vlan.sta);
2279 if (sta) {
2280 *sta_out = sta;
2281 return 0;
2282 } else if (sdata->wdev.use_4addr) {
2283 return -ENOLINK;
2284 }
2285 /* fall through */
2286 case NL80211_IFTYPE_AP:
2287 case NL80211_IFTYPE_OCB:
2288 case NL80211_IFTYPE_ADHOC:
2289 if (is_multicast_ether_addr(skb->data)) {
2290 *sta_out = ERR_PTR(-ENOENT);
2291 return 0;
2292 }
2293 sta = sta_info_get_bss(sdata, skb->data);
2294 break;
2295 case NL80211_IFTYPE_WDS:
2296 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2297 break;
2298#ifdef CONFIG_MAC80211_MESH
2299 case NL80211_IFTYPE_MESH_POINT:
2300 /* determined much later */
2301 *sta_out = NULL;
2302 return 0;
2303#endif
2304 case NL80211_IFTYPE_STATION:
2305 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2306 sta = sta_info_get(sdata, skb->data);
11d62caf
JB		 2307 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2308 if (test_sta_flag(sta,
2309 WLAN_STA_TDLS_PEER_AUTH)) {
97ffe757
JB		 2310 *sta_out = sta;
2311 return 0;
2312 }
2313
2314 /*
2315 * TDLS link during setup - throw out frames to
2316 * peer. Allow TDLS-setup frames to unauthorized
2317 * peers for the special case of a link teardown
2318 * after a TDLS sta is removed due to being
2319 * unreachable.
2320 */
11d62caf 2321 if (!ieee80211_is_tdls_setup(skb))
97ffe757
JB		 2322 return -EINVAL;
2323 }
2324
2325 }
2326
2327 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2328 if (!sta)
2329 return -ENOLINK;
2330 break;
2331 default:
2332 return -EINVAL;
2333 }
2334
2335 *sta_out = sta ?: ERR_PTR(-ENOENT);
2336 return 0;
ad38bfc9
MG		 2337}
2338
e2ebc74d 2339/**
4c9451ed
JB		 2340 * ieee80211_build_hdr - build 802.11 header in the given frame
2341 * @sdata: virtual interface to build the header for
2342 * @skb: the skb to build the header in
24d342c5 2343 * @info_flags: skb flags to set
e2ebc74d 2344 *
4c9451ed
JB		 2345 * This function takes the skb with 802.3 header and reformats the header to
2346 * the appropriate IEEE 802.11 header based on which interface the packet is
2347 * being transmitted on.
2348 *
2349 * Note that this function also takes care of the TX status request and
2350 * potential unsharing of the SKB - this needs to be interleaved with the
2351 * header building.
e2ebc74d 2352 *
4c9451ed
JB		 2353 * The function requires the read-side RCU lock held
2354 *
2355 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2356 */
4c9451ed 2357static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2358 struct sk_buff *skb, u32 info_flags,
97ffe757 2359 struct sta_info *sta)
e2ebc74d 2360{
133b8226 2361 struct ieee80211_local *local = sdata->local;
489ee919 2362 struct ieee80211_tx_info *info;
dcf33963 2363 int head_need;
065e9605
HH		 2364 u16 ethertype, hdrlen, meshhdrlen = 0;
2365 __le16 fc;
e2ebc74d 2366 struct ieee80211_hdr hdr;
ff67bb86 2367 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2368 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2369 const u8 *encaps_data;
2370 int encaps_len, skip_header_bytes;
97ffe757
JB		 2371 bool wme_sta = false, authorized = false;
2372 bool tdls_peer;
a729cff8 2373 bool multicast;
a729cff8 2374 u16 info_id = 0;
55de908a
JB		 2375 struct ieee80211_chanctx_conf *chanctx_conf;
2376 struct ieee80211_sub_if_data *ap_sdata;
57fbcce3 2377 enum nl80211_band band;
4c9451ed 2378 int ret;
e2ebc74d 2379
97ffe757
JB		 2380 if (IS_ERR(sta))
2381 sta = NULL;
2382
e2ebc74d
JB		 2383 /* convert Ethernet header to proper 802.11 header (based on
2384 * operation mode) */
2385 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2386 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2387
51fb61e7 2388 switch (sdata->vif.type) {
05c914fe 2389 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2390 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2391 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2392 /* RA TA DA SA */
2393 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2394 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2395 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2396 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2397 hdrlen = 30;
c2c98fde 2398 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2399 wme_sta = sta->sta.wme;
f14543ee 2400 }
55de908a
JB		 2401 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2402 u.ap);
2403 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
4c9451ed
JB		 2404 if (!chanctx_conf) {
2405 ret = -ENOTCONN;
2406 goto free;
2407 }
4bf88530 2408 band = chanctx_conf->def.chan->band;
97ffe757 2409 if (sdata->wdev.use_4addr)
f14543ee
FF		 2410 break;
2411 /* fall through */
2412 case NL80211_IFTYPE_AP:
fe80123d
AB		 2413 if (sdata->vif.type == NL80211_IFTYPE_AP)
2414 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2415 if (!chanctx_conf) {
2416 ret = -ENOTCONN;
2417 goto free;
2418 }
065e9605 2419 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2420 /* DA BSSID SA */
2421 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 2422 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2423 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2424 hdrlen = 24;
4bf88530 2425 band = chanctx_conf->def.chan->band;
cf966838 2426 break;
05c914fe 2427 case NL80211_IFTYPE_WDS:
065e9605 2428 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 2429 /* RA TA DA SA */
2430 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 2431 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2432 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2433 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2434 hdrlen = 30;
55de908a
JB		 2435 /*
2436 * This is the exception! WDS style interfaces are prohibited
2437 * when channel contexts are in used so this must be valid
2438 */
675a0b04 2439 band = local->hw.conf.chandef.chan->band;
cf966838 2440 break;
33b64eb2 2441#ifdef CONFIG_MAC80211_MESH
05c914fe 2442 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2443 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2444 struct sta_info *next_hop;
2445 bool mpp_lookup = true;
2446
bf7cd94d 2447 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2448 if (mpath) {
2449 mpp_lookup = false;
2450 next_hop = rcu_dereference(mpath->next_hop);
2451 if (!next_hop ||
2452 !(mpath->flags & (MESH_PATH_ACTIVE |
2453 MESH_PATH_RESOLVING)))
2454 mpp_lookup = true;
2455 }
2456
ab1c7906 2457 if (mpp_lookup) {
bf7cd94d 2458 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2459 if (mppath)
2460 mppath->exp_time = jiffies;
2461 }
163df6cf
CYY		 2462
2463 if (mppath && mpath)
2bdaf386 2464 mesh_path_del(sdata, mpath->dst);
b8bacc18 2465 }
79617dee 2466
f76b57b4 2467 /*
9d52501b
JF		 2468 * Use address extension if it is a packet from
2469 * another interface or if we know the destination
2470 * is being proxied by a portal (i.e. portal address
2471 * differs from proxied address)
f76b57b4 2472 */
b203ca39
JP		 2473 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2474 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2475 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2476 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2477 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2478 NULL, NULL);
79617dee 2479 } else {
27f01124
TP		 2480 /* DS -> MBSS (802.11-2012 13.11.3.3).
2481 * For unicast with unknown forwarding information,
2482 * destination might be in the MBSS or if that fails
2483 * forwarded to another mesh gate. In either case
2484 * resolution will be handled in ieee80211_xmit(), so
2485 * leave the original DA. This also works for mcast */
2486 const u8 *mesh_da = skb->data;
2487
2488 if (mppath)
2489 mesh_da = mppath->mpp;
2490 else if (mpath)
2491 mesh_da = mpath->dst;
79617dee 2492
3c5772a5 2493 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2494 mesh_da, sdata->vif.addr);
27f01124
TP		 2495 if (is_multicast_ether_addr(mesh_da))
2496 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2497 meshhdrlen = ieee80211_new_mesh_header(
2498 sdata, &mesh_hdr,
2499 skb->data + ETH_ALEN, NULL);
3c5772a5 2500 else
27f01124 2501 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2502 meshhdrlen = ieee80211_new_mesh_header(
2503 sdata, &mesh_hdr, skb->data,
2504 skb->data + ETH_ALEN);
79617dee 2505
79617dee 2506 }
55de908a 2507 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2508 if (!chanctx_conf) {
2509 ret = -ENOTCONN;
2510 goto free;
2511 }
4bf88530 2512 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 2513 break;
2514#endif
05c914fe 2515 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2516 /* we already did checks when looking up the RA STA */
2517 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2518
97ffe757 2519 if (tdls_peer) {
941c93cd
AN		 2520 /* DA SA BSSID */
2521 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2522 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2523 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2524 hdrlen = 24;
2525 } else if (sdata->u.mgd.use_4addr &&
2526 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2527 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2528 IEEE80211_FCTL_TODS);
f14543ee 2529 /* RA TA DA SA */
941c93cd 2530 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 2531 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2532 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2533 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2534 hdrlen = 30;
2535 } else {
2536 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2537 /* BSSID SA DA */
941c93cd 2538 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 2539 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2540 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2541 hdrlen = 24;
2542 }
55de908a 2543 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2544 if (!chanctx_conf) {
2545 ret = -ENOTCONN;
2546 goto free;
2547 }
4bf88530 2548 band = chanctx_conf->def.chan->band;
cf966838 2549 break;
239281f8
RL		 2550 case NL80211_IFTYPE_OCB:
2551 /* DA SA BSSID */
2552 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2553 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2554 eth_broadcast_addr(hdr.addr3);
2555 hdrlen = 24;
2556 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2557 if (!chanctx_conf) {
2558 ret = -ENOTCONN;
2559 goto free;
2560 }
239281f8
RL		 2561 band = chanctx_conf->def.chan->band;
2562 break;
05c914fe 2563 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2564 /* DA SA BSSID */
2565 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2566 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2567 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2568 hdrlen = 24;
55de908a 2569 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2570 if (!chanctx_conf) {
2571 ret = -ENOTCONN;
2572 goto free;
2573 }
4bf88530 2574 band = chanctx_conf->def.chan->band;
cf966838
JB		 2575 break;
2576 default:
4c9451ed
JB		 2577 ret = -EINVAL;
2578 goto free;
e2ebc74d
JB		 2579 }
2580
a729cff8 2581 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2582
97ffe757
JB		 2583 /* sta is always NULL for mesh */
2584 if (sta) {
2585 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2586 wme_sta = sta->sta.wme;
2587 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2588 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2589 wme_sta = true;
97ffe757 2590 }
4777be41 2591
527871d7
JB		 2592 /* receiver does QoS (which also means we do) use it */
2593 if (wme_sta) {
065e9605 2594 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2595 hdrlen += 2;
2596 }
2597
2598 /*
238814fd
JB		 2599 * Drop unicast frames to unauthorised stations unless they are
2600 * EAPOL frames from the local station.
ce3edf6d 2601 */
55182e4a 2602 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2603 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2604 !multicast && !authorized &&
55182e4a 2605 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2606 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2607#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2608 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2609 sdata->name, hdr.addr1);
ce3edf6d
JB		 2610#endif
2611
2612 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2613
4c9451ed
JB		 2614 ret = -EPERM;
2615 goto free;
ce3edf6d
JB		 2616 }
2617
a729cff8
JB		 2618 if (unlikely(!multicast && skb->sk &&
2619 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
bf7fa551 2620 struct sk_buff *ack_skb = skb_clone_sk(skb);
a729cff8 2621
bf7fa551 2622 if (ack_skb) {
a729cff8 2623 unsigned long flags;
9475af6e 2624 int id;
a729cff8
JB		 2625
2626 spin_lock_irqsave(&local->ack_status_lock, flags);
bf7fa551 2627 id = idr_alloc(&local->ack_status_frames, ack_skb,
9475af6e 2628 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2629 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2630
9475af6e 2631 if (id >= 0) {
a729cff8
JB		 2632 info_id = id;
2633 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
a729cff8 2634 } else {
bf7fa551 2635 kfree_skb(ack_skb);
a729cff8 2636 }
a729cff8
JB		 2637 }
2638 }
2639
7e244707
HS		 2640 /*
2641 * If the skb is shared we need to obtain our own copy.
2642 */
2643 if (skb_shared(skb)) {
a729cff8
JB		 2644 struct sk_buff *tmp_skb = skb;
2645
2646 /* can't happen -- skb is a clone if info_id != 0 */
2647 WARN_ON(info_id);
2648
f8a0a781 2649 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2650 kfree_skb(tmp_skb);
2651
4c9451ed
JB		 2652 if (!skb) {
2653 ret = -ENOMEM;
2654 goto free;
2655 }
7e244707
HS		 2656 }
2657
065e9605 2658 hdr.frame_control = fc;
e2ebc74d
JB		 2659 hdr.duration_id = 0;
2660 hdr.seq_ctrl = 0;
2661
2662 skip_header_bytes = ETH_HLEN;
2663 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2664 encaps_data = bridge_tunnel_header;
2665 encaps_len = sizeof(bridge_tunnel_header);
2666 skip_header_bytes -= 2;
e5c5d22e 2667 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2668 encaps_data = rfc1042_header;
2669 encaps_len = sizeof(rfc1042_header);
2670 skip_header_bytes -= 2;
2671 } else {
2672 encaps_data = NULL;
2673 encaps_len = 0;
2674 }
2675
2676 skb_pull(skb, skip_header_bytes);
23c0752a 2677 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2678
23c0752a
JB		 2679 /*
2680 * So we need to modify the skb header and hence need a copy of
2681 * that. The head_need variable above doesn't, so far, include
2682 * the needed header space that we don't need right away. If we
2683 * can, then we don't reallocate right now but only after the
2684 * frame arrives at the master device (if it does...)
2685 *
2686 * If we cannot, however, then we will reallocate to include all
2687 * the ever needed space. Also, if we need to reallocate it anyway,
2688 * make it big enough for everything we may ever need.
2689 */
e2ebc74d 2690
3a5be7d4 2691 if (head_need > 0 || skb_cloned(skb)) {
2475b1cc 2692 head_need += sdata->encrypt_headroom;
23c0752a
JB		 2693 head_need += local->tx_headroom;
2694 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2695 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2696 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2697 skb = NULL;
4c9451ed 2698 return ERR_PTR(-ENOMEM);
c3e7724b 2699 }
e2ebc74d
JB		 2700 }
2701
eae4430e 2702 if (encaps_data)
e2ebc74d 2703 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2704
e4ab7eb0 2705#ifdef CONFIG_MAC80211_MESH
eae4430e 2706 if (meshhdrlen > 0)
33b64eb2 2707 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2708#endif
33b64eb2 2709
065e9605 2710 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2711 __le16 *qos_control;
2712
f359d3fe 2713 qos_control = (__le16 *) skb_push(skb, 2);
c29b9b9b
JB		 2714 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2715 /*
2716 * Maybe we could actually set some fields here, for now just
2717 * initialise to zero to indicate no special operation.
2718 */
2719 *qos_control = 0;
2720 } else
2721 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2722
d57a544d 2723 skb_reset_mac_header(skb);
e2ebc74d 2724
489ee919 2725 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2726 memset(info, 0, sizeof(*info));
2727
a729cff8
JB		 2728 info->flags = info_flags;
2729 info->ack_frame_id = info_id;
73c4e195 2730 info->band = band;
a729cff8 2731
4c9451ed
JB		 2732 return skb;
2733 free:
2734 kfree_skb(skb);
2735 return ERR_PTR(ret);
2736}
2737
17c18bf8
JB		 2738/*
2739 * fast-xmit overview
2740 *
2741 * The core idea of this fast-xmit is to remove per-packet checks by checking
2742 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2743 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2744 * much less work can be done per packet. For example, fragmentation must be
2745 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2746 * in the code here.
2747 *
2748 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2749 * header and other data to aid packet processing in ieee80211_xmit_fast().
2750 *
2751 * The most difficult part of this is that when any of these assumptions
2752 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2753 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2754 * since the per-packet code no longer checks the conditions. This is reflected
2755 * by the calls to these functions throughout the rest of the code, and must be
2756 * maintained if any of the TX path checks change.
2757 */
2758
2759void ieee80211_check_fast_xmit(struct sta_info *sta)
2760{
2761 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2762 struct ieee80211_local *local = sta->local;
2763 struct ieee80211_sub_if_data *sdata = sta->sdata;
2764 struct ieee80211_hdr *hdr = (void *)build.hdr;
2765 struct ieee80211_chanctx_conf *chanctx_conf;
2766 __le16 fc;
2767
30686bf7 2768 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 2769 return;
2770
2771 /* Locking here protects both the pointer itself, and against concurrent
2772 * invocations winning data access races to, e.g., the key pointer that
2773 * is used.
2774 * Without it, the invocation of this function right after the key
2775 * pointer changes wouldn't be sufficient, as another CPU could access
2776 * the pointer, then stall, and then do the cache update after the CPU
2777 * that invalidated the key.
2778 * With the locking, such scenarios cannot happen as the check for the
2779 * key and the fast-tx assignment are done atomically, so the CPU that
2780 * modifies the key will either wait or other one will see the key
2781 * cleared/changed already.
2782 */
2783 spin_lock_bh(&sta->lock);
30686bf7
JB		 2784 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2785 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 2786 sdata->vif.type == NL80211_IFTYPE_STATION)
2787 goto out;
2788
2789 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2790 goto out;
2791
2792 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2793 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 2794 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2795 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 2796 goto out;
2797
2798 if (sdata->noack_map)
2799 goto out;
2800
2801 /* fast-xmit doesn't handle fragmentation at all */
725b812c
JB		 2802 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2803 !local->ops->set_frag_threshold)
17c18bf8
JB		 2804 goto out;
2805
2806 rcu_read_lock();
2807 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2808 if (!chanctx_conf) {
2809 rcu_read_unlock();
2810 goto out;
2811 }
2812 build.band = chanctx_conf->def.chan->band;
2813 rcu_read_unlock();
2814
2815 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2816
2817 switch (sdata->vif.type) {
3ffd8840
JB		 2818 case NL80211_IFTYPE_ADHOC:
2819 /* DA SA BSSID */
2820 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2821 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2822 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2823 build.hdr_len = 24;
2824 break;
17c18bf8
JB		 2825 case NL80211_IFTYPE_STATION:
2826 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2827 /* DA SA BSSID */
2828 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2829 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2830 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2831 build.hdr_len = 24;
2832 break;
2833 }
2834
2835 if (sdata->u.mgd.use_4addr) {
2836 /* non-regular ethertype cannot use the fastpath */
2837 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2838 IEEE80211_FCTL_TODS);
2839 /* RA TA DA SA */
2840 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2841 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2842 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2843 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2844 build.hdr_len = 30;
2845 break;
2846 }
2847 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2848 /* BSSID SA DA */
2849 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2850 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2851 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2852 build.hdr_len = 24;
2853 break;
2854 case NL80211_IFTYPE_AP_VLAN:
2855 if (sdata->wdev.use_4addr) {
2856 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2857 IEEE80211_FCTL_TODS);
2858 /* RA TA DA SA */
2859 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2860 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2861 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2862 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2863 build.hdr_len = 30;
2864 break;
2865 }
2866 /* fall through */
2867 case NL80211_IFTYPE_AP:
2868 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2869 /* DA BSSID SA */
2870 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2871 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2872 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2873 build.hdr_len = 24;
2874 break;
2875 default:
2876 /* not handled on fast-xmit */
2877 goto out;
2878 }
2879
2880 if (sta->sta.wme) {
2881 build.hdr_len += 2;
2882 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2883 }
2884
2885 /* We store the key here so there's no point in using rcu_dereference()
2886 * but that's fine because the code that changes the pointers will call
2887 * this function after doing so. For a single CPU that would be enough,
2888 * for multiple see the comment above.
2889 */
2890 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2891 if (!build.key)
2892 build.key = rcu_access_pointer(sdata->default_unicast_key);
2893 if (build.key) {
e495c247 2894 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 2895
2896 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2897 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
e495c247 2898 mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC;
17c18bf8
JB		 2899
2900 /* don't handle software crypto */
2901 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2902 goto out;
2903
2904 switch (build.key->conf.cipher) {
2905 case WLAN_CIPHER_SUITE_CCMP:
2906 case WLAN_CIPHER_SUITE_CCMP_256:
2907 /* add fixed key ID */
2908 if (gen_iv) {
2909 (build.hdr + build.hdr_len)[3] =
2910 0x20 | (build.key->conf.keyidx << 6);
2911 build.pn_offs = build.hdr_len;
2912 }
2913 if (gen_iv || iv_spc)
2914 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2915 break;
2916 case WLAN_CIPHER_SUITE_GCMP:
2917 case WLAN_CIPHER_SUITE_GCMP_256:
2918 /* add fixed key ID */
2919 if (gen_iv) {
2920 (build.hdr + build.hdr_len)[3] =
2921 0x20 | (build.key->conf.keyidx << 6);
2922 build.pn_offs = build.hdr_len;
2923 }
2924 if (gen_iv || iv_spc)
2925 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2926 break;
e495c247
JB		 2927 case WLAN_CIPHER_SUITE_TKIP:
2928 /* cannot handle MMIC or IV generation in xmit-fast */
2929 if (mmic || gen_iv)
2930 goto out;
2931 if (iv_spc)
2932 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2933 break;
2934 case WLAN_CIPHER_SUITE_WEP40:
2935 case WLAN_CIPHER_SUITE_WEP104:
2936 /* cannot handle IV generation in fast-xmit */
2937 if (gen_iv)
2938 goto out;
2939 if (iv_spc)
2940 build.hdr_len += IEEE80211_WEP_IV_LEN;
2941 break;
2942 case WLAN_CIPHER_SUITE_AES_CMAC:
2943 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2944 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2945 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2946 WARN(1,
2947 "management cipher suite 0x%x enabled for data\n",
2948 build.key->conf.cipher);
17c18bf8 2949 goto out;
e495c247
JB		 2950 default:
2951 /* we don't know how to generate IVs for this at all */
2952 if (WARN_ON(gen_iv))
2953 goto out;
2954 /* pure hardware keys are OK, of course */
2955 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2956 break;
2957 /* cipher scheme might require space allocation */
2958 if (iv_spc &&
2959 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2960 goto out;
2961 if (iv_spc)
2962 build.hdr_len += build.key->conf.iv_len;
17c18bf8
JB		 2963 }
2964
2965 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2966 }
2967
2968 hdr->frame_control = fc;
2969
2970 memcpy(build.hdr + build.hdr_len,
2971 rfc1042_header, sizeof(rfc1042_header));
2972 build.hdr_len += sizeof(rfc1042_header);
2973
2974 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
2975 /* if the kmemdup fails, continue w/o fast_tx */
2976 if (!fast_tx)
2977 goto out;
2978
2979 out:
2980 /* we might have raced against another call to this function */
2981 old = rcu_dereference_protected(sta->fast_tx,
2982 lockdep_is_held(&sta->lock));
2983 rcu_assign_pointer(sta->fast_tx, fast_tx);
2984 if (old)
2985 kfree_rcu(old, rcu_head);
2986 spin_unlock_bh(&sta->lock);
2987}
2988
2989void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
2990{
2991 struct sta_info *sta;
2992
2993 rcu_read_lock();
2994 list_for_each_entry_rcu(sta, &local->sta_list, list)
2995 ieee80211_check_fast_xmit(sta);
2996 rcu_read_unlock();
2997}
2998
2999void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3000{
3001 struct ieee80211_local *local = sdata->local;
3002 struct sta_info *sta;
3003
3004 rcu_read_lock();
3005
3006 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3007 if (sdata != sta->sdata &&
3008 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3009 continue;
3010 ieee80211_check_fast_xmit(sta);
3011 }
3012
3013 rcu_read_unlock();
3014}
3015
3016void ieee80211_clear_fast_xmit(struct sta_info *sta)
3017{
3018 struct ieee80211_fast_tx *fast_tx;
3019
3020 spin_lock_bh(&sta->lock);
3021 fast_tx = rcu_dereference_protected(sta->fast_tx,
3022 lockdep_is_held(&sta->lock));
3023 RCU_INIT_POINTER(sta->fast_tx, NULL);
3024 spin_unlock_bh(&sta->lock);
3025
3026 if (fast_tx)
3027 kfree_rcu(fast_tx, rcu_head);
3028}
3029
6e0456b5
FF		 3030static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3031 struct sk_buff *skb, int headroom,
3032 int *subframe_len)
3033{
3034 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3035 int padding = (4 - amsdu_len) & 3;
3036
3037 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3038 I802_DEBUG_INC(local->tx_expand_skb_head);
3039
3040 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3041 wiphy_debug(local->hw.wiphy,
3042 "failed to reallocate TX buffer\n");
3043 return false;
3044 }
3045 }
3046
3047 if (padding) {
3048 *subframe_len += padding;
3049 memset(skb_put(skb, padding), 0, padding);
3050 }
3051
3052 return true;
3053}
3054
3055static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3056 struct ieee80211_fast_tx *fast_tx,
3057 struct sk_buff *skb)
3058{
3059 struct ieee80211_local *local = sdata->local;
3060 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3061 struct ieee80211_hdr *hdr;
3062 struct ethhdr amsdu_hdr;
3063 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3064 int subframe_len = skb->len - hdr_len;
3065 void *data;
3066 u8 *qc;
3067
3068 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3069 return false;
3070
3071 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3072 return true;
3073
3074 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(amsdu_hdr),
3075 &subframe_len))
3076 return false;
3077
3078 amsdu_hdr.h_proto = cpu_to_be16(subframe_len);
3079 memcpy(amsdu_hdr.h_source, skb->data + fast_tx->sa_offs, ETH_ALEN);
3080 memcpy(amsdu_hdr.h_dest, skb->data + fast_tx->da_offs, ETH_ALEN);
3081
3082 data = skb_push(skb, sizeof(amsdu_hdr));
3083 memmove(data, data + sizeof(amsdu_hdr), hdr_len);
3084 memcpy(data + hdr_len, &amsdu_hdr, sizeof(amsdu_hdr));
3085
3086 hdr = data;
3087 qc = ieee80211_get_qos_ctl(hdr);
3088 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3089
3090 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3091
3092 return true;
3093}
3094
3095static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3096 struct sta_info *sta,
3097 struct ieee80211_fast_tx *fast_tx,
3098 struct sk_buff *skb)
3099{
3100 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3101 struct fq *fq = &local->fq;
3102 struct fq_tin *tin;
3103 struct fq_flow *flow;
6e0456b5
FF		 3104 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3105 struct ieee80211_txq *txq = sta->sta.txq[tid];
3106 struct txq_info *txqi;
3107 struct sk_buff **frag_tail, *head;
3108 int subframe_len = skb->len - ETH_ALEN;
3109 u8 max_subframes = sta->sta.max_amsdu_subframes;
3110 int max_frags = local->hw.max_tx_fragments;
3111 int max_amsdu_len = sta->sta.max_amsdu_len;
3112 __be16 len;
3113 void *data;
3114 bool ret = false;
fa962b92 3115 unsigned int orig_len;
6e0456b5
FF		 3116 int n = 1, nfrags;
3117
3118 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3119 return false;
3120
3121 if (!txq)
3122 return false;
3123
3124 txqi = to_txq_info(txq);
3125 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3126 return false;
3127
3128 if (sta->sta.max_rc_amsdu_len)
3129 max_amsdu_len = min_t(int, max_amsdu_len,
3130 sta->sta.max_rc_amsdu_len);
3131
fa962b92 3132 spin_lock_bh(&fq->lock);
6e0456b5 3133
fa962b92
MK		 3134 /* TODO: Ideally aggregation should be done on dequeue to remain
3135 * responsive to environment changes.
3136 */
3137
3138 tin = &txqi->tin;
3139 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3140 head = skb_peek_tail(&flow->queue);
6e0456b5
FF		 3141 if (!head)
3142 goto out;
3143
fa962b92
MK		 3144 orig_len = head->len;
3145
6e0456b5
FF		 3146 if (skb->len + head->len > max_amsdu_len)
3147 goto out;
3148
3149 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3150 goto out;
3151
3152 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3153 nfrags += 1 + skb_shinfo(head)->nr_frags;
3154 frag_tail = &skb_shinfo(head)->frag_list;
3155 while (*frag_tail) {
3156 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3157 frag_tail = &(*frag_tail)->next;
3158 n++;
3159 }
3160
3161 if (max_subframes && n > max_subframes)
3162 goto out;
3163
3164 if (max_frags && nfrags > max_frags)
3165 goto out;
3166
3167 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3168 &subframe_len))
3169 goto out;
3170
3171 ret = true;
3172 data = skb_push(skb, ETH_ALEN + 2);
3173 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3174
3175 data += 2 * ETH_ALEN;
3176 len = cpu_to_be16(subframe_len);
3177 memcpy(data, &len, 2);
3178 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3179
3180 head->len += skb->len;
3181 head->data_len += skb->len;
3182 *frag_tail = skb;
3183
fa962b92
MK		 3184 flow->backlog += head->len - orig_len;
3185 tin->backlog_bytes += head->len - orig_len;
3186
3187 fq_recalc_backlog(fq, tin, flow);
3188
6e0456b5 3189out:
fa962b92 3190 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3191
3192 return ret;
3193}
3194
bb42f2d1
THJ		 3195/*
3196 * Can be called while the sta lock is held. Anything that can cause packets to
3197 * be generated will cause deadlock!
3198 */
3199static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3200 struct sta_info *sta, u8 pn_offs,
3201 struct ieee80211_key *key,
3202 struct sk_buff *skb)
3203{
3204 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3205 struct ieee80211_hdr *hdr = (void *)skb->data;
3206 u8 tid = IEEE80211_NUM_TIDS;
3207
3208 if (key)
3209 info->control.hw_key = &key->conf;
3210
3211 ieee80211_tx_stats(skb->dev, skb->len);
3212
3213 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3214 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3215 *ieee80211_get_qos_ctl(hdr) = tid;
3216 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3217 } else {
3218 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3219 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3220 sdata->sequence_number += 0x10;
3221 }
3222
3223 if (skb_shinfo(skb)->gso_size)
3224 sta->tx_stats.msdu[tid] +=
3225 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3226 else
3227 sta->tx_stats.msdu[tid]++;
3228
3229 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3230
3231 /* statistics normally done by ieee80211_tx_h_stats (but that
3232 * has to consider fragmentation, so is more complex)
3233 */
3234 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3235 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3236
3237 if (pn_offs) {
3238 u64 pn;
3239 u8 *crypto_hdr = skb->data + pn_offs;
3240
3241 switch (key->conf.cipher) {
3242 case WLAN_CIPHER_SUITE_CCMP:
3243 case WLAN_CIPHER_SUITE_CCMP_256:
3244 case WLAN_CIPHER_SUITE_GCMP:
3245 case WLAN_CIPHER_SUITE_GCMP_256:
3246 pn = atomic64_inc_return(&key->conf.tx_pn);
3247 crypto_hdr[0] = pn;
3248 crypto_hdr[1] = pn >> 8;
3249 crypto_hdr[4] = pn >> 16;
3250 crypto_hdr[5] = pn >> 24;
3251 crypto_hdr[6] = pn >> 32;
3252 crypto_hdr[7] = pn >> 40;
3253 break;
3254 }
3255 }
3256}
3257
17c18bf8 3258static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
bb42f2d1 3259 struct sta_info *sta,
17c18bf8
JB		 3260 struct ieee80211_fast_tx *fast_tx,
3261 struct sk_buff *skb)
3262{
3263 struct ieee80211_local *local = sdata->local;
3264 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3265 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3266 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3267 struct ethhdr eth;
3268 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3269 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3270 struct ieee80211_tx_data tx;
3271 ieee80211_tx_result r;
3272 struct tid_ampdu_tx *tid_tx = NULL;
3273 u8 tid = IEEE80211_NUM_TIDS;
3274
3275 /* control port protocol needs a lot of special handling */
3276 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3277 return false;
3278
3279 /* only RFC 1042 SNAP */
3280 if (ethertype < ETH_P_802_3_MIN)
3281 return false;
3282
3283 /* don't handle TX status request here either */
3284 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3285 return false;
3286
3287 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3288 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3289 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
472be00d
JB		 3290 if (tid_tx) {
3291 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3292 return false;
3293 if (tid_tx->timeout)
3294 tid_tx->last_tx = jiffies;
3295 }
17c18bf8
JB		 3296 }
3297
3298 /* after this point (skb is modified) we cannot return false */
3299
3300 if (skb_shared(skb)) {
3301 struct sk_buff *tmp_skb = skb;
3302
3303 skb = skb_clone(skb, GFP_ATOMIC);
3304 kfree_skb(tmp_skb);
3305
3306 if (!skb)
3307 return true;
3308 }
3309
6e0456b5
FF		 3310 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3311 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3312 return true;
3313
17c18bf8
JB		 3314 /* will not be crypto-handled beyond what we do here, so use false
3315 * as the may-encrypt argument for the resize to not account for
3316 * more room than we already have in 'extra_head'
3317 */
3318 if (unlikely(ieee80211_skb_resize(sdata, skb,
3319 max_t(int, extra_head + hw_headroom -
3320 skb_headroom(skb), 0),
3321 false))) {
3322 kfree_skb(skb);
3323 return true;
3324 }
3325
3326 memcpy(&eth, skb->data, ETH_HLEN - 2);
3327 hdr = (void *)skb_push(skb, extra_head);
3328 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3329 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3330 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3331
3332 memset(info, 0, sizeof(*info));
3333 info->band = fast_tx->band;
3334 info->control.vif = &sdata->vif;
3335 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3336 IEEE80211_TX_CTL_DONTFRAG |
3337 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
bb42f2d1 3338 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
17c18bf8
JB		 3339
3340 __skb_queue_head_init(&tx.skbs);
3341
3342 tx.flags = IEEE80211_TX_UNICAST;
3343 tx.local = local;
3344 tx.sdata = sdata;
3345 tx.sta = sta;
3346 tx.key = fast_tx->key;
3347
30686bf7 3348 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
17c18bf8
JB		 3349 tx.skb = skb;
3350 r = ieee80211_tx_h_rate_ctrl(&tx);
3351 skb = tx.skb;
3352 tx.skb = NULL;
3353
3354 if (r != TX_CONTINUE) {
3355 if (r != TX_QUEUED)
3356 kfree_skb(skb);
3357 return true;
3358 }
3359 }
3360
bb42f2d1
THJ		 3361 if (ieee80211_queue_skb(local, sdata, sta, skb))
3362 return true;
17c18bf8 3363
bb42f2d1
THJ		 3364 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3365 fast_tx->key, skb);
17c18bf8
JB		 3366
3367 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3368 sdata = container_of(sdata->bss,
3369 struct ieee80211_sub_if_data, u.ap);
3370
3371 __skb_queue_tail(&tx.skbs, skb);
3372 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3373 return true;
3374}
3375
e0e2efff
THJ		 3376struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3377 struct ieee80211_txq *txq)
3378{
3379 struct ieee80211_local *local = hw_to_local(hw);
3380 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3381 struct ieee80211_hdr *hdr;
3382 struct sk_buff *skb = NULL;
3383 struct fq *fq = &local->fq;
3384 struct fq_tin *tin = &txqi->tin;
bb42f2d1
THJ		 3385 struct ieee80211_tx_info *info;
3386 struct ieee80211_tx_data tx;
3387 ieee80211_tx_result r;
e0e2efff
THJ		 3388
3389 spin_lock_bh(&fq->lock);
3390
3391 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3392 goto out;
3393
bb42f2d1
THJ		 3394 /* Make sure fragments stay together. */
3395 skb = __skb_dequeue(&txqi->frags);
3396 if (skb)
3397 goto out;
3398
3399begin:
e0e2efff
THJ		 3400 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3401 if (!skb)
3402 goto out;
3403
3404 ieee80211_set_skb_vif(skb, txqi);
3405
3406 hdr = (struct ieee80211_hdr *)skb->data;
bb42f2d1
THJ		 3407 info = IEEE80211_SKB_CB(skb);
3408
3409 memset(&tx, 0, sizeof(tx));
3410 __skb_queue_head_init(&tx.skbs);
3411 tx.local = local;
3412 tx.skb = skb;
3413 tx.sdata = vif_to_sdata(info->control.vif);
3414
3415 if (txq->sta)
3416 tx.sta = container_of(txq->sta, struct sta_info, sta);
3417
3418 /*
3419 * The key can be removed while the packet was queued, so need to call
3420 * this here to get the current key.
3421 */
3422 r = ieee80211_tx_h_select_key(&tx);
3423 if (r != TX_CONTINUE) {
3424 ieee80211_free_txskb(&local->hw, skb);
3425 goto begin;
3426 }
3427
3428 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
e0e2efff
THJ		 3429 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3430 sta);
bb42f2d1 3431 u8 pn_offs = 0;
e0e2efff 3432
bb42f2d1
THJ		 3433 if (tx.key &&
3434 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3435 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3436
3437 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3438 tx.key, skb);
3439 } else {
3440 if (invoke_tx_handlers_late(&tx))
3441 goto begin;
3442
3443 skb = __skb_dequeue(&tx.skbs);
3444
3445 if (!skb_queue_empty(&tx.skbs))
3446 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
e0e2efff
THJ		 3447 }
3448
1e1430d5
JB		 3449 if (skb && skb_has_frag_list(skb) &&
3450 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3451 if (skb_linearize(skb)) {
3452 ieee80211_free_txskb(&local->hw, skb);
3453 goto begin;
3454 }
3455 }
3456
e0e2efff
THJ		 3457out:
3458 spin_unlock_bh(&fq->lock);
3459
e0e2efff
THJ		 3460 return skb;
3461}
3462EXPORT_SYMBOL(ieee80211_tx_dequeue);
3463
4c9451ed
JB		 3464void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3465 struct net_device *dev,
3466 u32 info_flags)
3467{
3468 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
97ffe757 3469 struct sta_info *sta;
80616c0d 3470 struct sk_buff *next;
4c9451ed
JB		 3471
3472 if (unlikely(skb->len < ETH_HLEN)) {
3473 kfree_skb(skb);
3474 return;
3475 }
3476
3477 rcu_read_lock();
e2ebc74d 3478
2d981fdd
JB		 3479 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3480 goto out_free;
4c9451ed 3481
17c18bf8
JB		 3482 if (!IS_ERR_OR_NULL(sta)) {
3483 struct ieee80211_fast_tx *fast_tx;
3484
3485 fast_tx = rcu_dereference(sta->fast_tx);
3486
3487 if (fast_tx &&
bb42f2d1 3488 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
17c18bf8
JB		 3489 goto out;
3490 }
3491
80616c0d
JB		 3492 if (skb_is_gso(skb)) {
3493 struct sk_buff *segs;
680a0dab 3494
80616c0d
JB		 3495 segs = skb_gso_segment(skb, 0);
3496 if (IS_ERR(segs)) {
2d981fdd 3497 goto out_free;
80616c0d
JB		 3498 } else if (segs) {
3499 consume_skb(skb);
3500 skb = segs;
3501 }
3502 } else {
3503 /* we cannot process non-linear frames on this path */
3504 if (skb_linearize(skb)) {
3505 kfree_skb(skb);
3506 goto out;
3507 }
3508
3509 /* the frame could be fragmented, software-encrypted, and other
3510 * things so we cannot really handle checksum offload with it -
3511 * fix it up in software before we handle anything else.
3512 */
3513 if (skb->ip_summed == CHECKSUM_PARTIAL) {
f603f1f3
JB		 3514 skb_set_transport_header(skb,
3515 skb_checksum_start_offset(skb));
80616c0d
JB		 3516 if (skb_checksum_help(skb))
3517 goto out_free;
3518 }
2d981fdd
JB		 3519 }
3520
80616c0d
JB		 3521 next = skb;
3522 while (next) {
3523 skb = next;
3524 next = skb->next;
4c9451ed 3525
80616c0d
JB		 3526 skb->prev = NULL;
3527 skb->next = NULL;
3528
3529 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3530 if (IS_ERR(skb))
3531 goto out;
e2ebc74d 3532
5a490510 3533 ieee80211_tx_stats(dev, skb->len);
80616c0d
JB		 3534
3535 ieee80211_xmit(sdata, sta, skb);
3536 }
2d981fdd
JB		 3537 goto out;
3538 out_free:
3539 kfree_skb(skb);
4c9451ed 3540 out:
55de908a 3541 rcu_read_unlock();
e2ebc74d
JB		 3542}
3543
4c9451ed
JB		 3544/**
3545 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3546 * @skb: packet to be sent
3547 * @dev: incoming interface
3548 *
3549 * On failure skb will be freed.
3550 */
24d342c5
LK		 3551netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3552 struct net_device *dev)
3553{
3554 __ieee80211_subif_start_xmit(skb, dev, 0);
3555 return NETDEV_TX_OK;
3556}
e2ebc74d 3557
7528ec57
JB		 3558struct sk_buff *
3559ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3560 struct sk_buff *skb, u32 info_flags)
3561{
3562 struct ieee80211_hdr *hdr;
3563 struct ieee80211_tx_data tx = {
3564 .local = sdata->local,
3565 .sdata = sdata,
3566 };
97ffe757 3567 struct sta_info *sta;
7528ec57
JB		 3568
3569 rcu_read_lock();
3570
97ffe757
JB		 3571 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3572 kfree_skb(skb);
3573 skb = ERR_PTR(-EINVAL);
3574 goto out;
3575 }
3576
3577 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
7528ec57
JB		 3578 if (IS_ERR(skb))
3579 goto out;
3580
3581 hdr = (void *)skb->data;
3582 tx.sta = sta_info_get(sdata, hdr->addr1);
3583 tx.skb = skb;
3584
3585 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3586 rcu_read_unlock();
3587 kfree_skb(skb);
3588 return ERR_PTR(-EINVAL);
3589 }
3590
3591out:
3592 rcu_read_unlock();
3593 return skb;
3594}
3595
e2530083
JB		 3596/*
3597 * ieee80211_clear_tx_pending may not be called in a context where
3598 * it is possible that it packets could come in again.
3599 */
e2ebc74d
JB		 3600void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3601{
1f98ab7f 3602 struct sk_buff *skb;
2de8e0d9 3603 int i;
e2ebc74d 3604
1f98ab7f
FF		 3605 for (i = 0; i < local->hw.queues; i++) {
3606 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3607 ieee80211_free_txskb(&local->hw, skb);
3608 }
e2ebc74d
JB		 3609}
3610
7bb45683
JB		 3611/*
3612 * Returns false if the frame couldn't be transmitted but was queued instead,
3613 * which in this case means re-queued -- take as an indication to stop sending
3614 * more pending frames.
3615 */
cd8ffc80
JB		 3616static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3617 struct sk_buff *skb)
3618{
3619 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3620 struct ieee80211_sub_if_data *sdata;
3621 struct sta_info *sta;
3622 struct ieee80211_hdr *hdr;
7bb45683 3623 bool result;
55de908a 3624 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 3625
5061b0c2 3626 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 3627
3628 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 3629 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3630 if (unlikely(!chanctx_conf)) {
3631 dev_kfree_skb(skb);
3632 return true;
3633 }
73c4e195 3634 info->band = chanctx_conf->def.chan->band;
7c10770f 3635 result = ieee80211_tx(sdata, NULL, skb, true);
cd8ffc80 3636 } else {
252b86c4
JB		 3637 struct sk_buff_head skbs;
3638
3639 __skb_queue_head_init(&skbs);
3640 __skb_queue_tail(&skbs, skb);
3641
cd8ffc80 3642 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 3643 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 3644
74e4dbfd 3645 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 3646 }
3647
cd8ffc80
JB		 3648 return result;
3649}
3650
e2530083 3651/*
3b8d81e0 3652 * Transmit all pending packets. Called from tasklet.
e2530083 3653 */
e2ebc74d
JB		 3654void ieee80211_tx_pending(unsigned long data)
3655{
3656 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 3657 unsigned long flags;
cd8ffc80 3658 int i;
3b8d81e0 3659 bool txok;
e2ebc74d 3660
f0e72851 3661 rcu_read_lock();
e2530083 3662
3b8d81e0 3663 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 3664 for (i = 0; i < local->hw.queues; i++) {
3665 /*
3666 * If queue is stopped by something other than due to pending
3667 * frames, or we have no pending frames, proceed to next queue.
3668 */
3b8d81e0 3669 if (local->queue_stop_reasons[i] ||
2a577d98 3670 skb_queue_empty(&local->pending[i]))
e2ebc74d 3671 continue;
e2530083 3672
2a577d98 3673 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 3674 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 3675 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 3676
a7bc376c 3677 if (WARN_ON(!info->control.vif)) {
c3e7724b 3678 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 3679 continue;
3680 }
3681
3b8d81e0
JB		 3682 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3683 flags);
3684
3685 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 3686 spin_lock_irqsave(&local->queue_stop_reason_lock,
3687 flags);
3688 if (!txok)
2a577d98 3689 break;
e2ebc74d 3690 }
7236fe29
JB		 3691
3692 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 3693 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 3694 }
3b8d81e0 3695 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 3696
f0e72851 3697 rcu_read_unlock();
e2ebc74d
JB		 3698}
3699
3700/* functions for drivers to get certain frames */
3701
eac70c13 3702static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3703 struct ps_data *ps, struct sk_buff *skb,
3704 bool is_template)
e2ebc74d
JB		 3705{
3706 u8 *pos, *tim;
3707 int aid0 = 0;
3708 int i, have_bits = 0, n1, n2;
3709
3710 /* Generate bitmap for TIM only if there are any STAs in power save
3711 * mode. */
d012a605 3712 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 3713 /* in the hope that this is faster than
3714 * checking byte-for-byte */
f359d3fe 3715 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 3716 IEEE80211_MAX_AID+1);
6ec8c332
AO		 3717 if (!is_template) {
3718 if (ps->dtim_count == 0)
3719 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3720 else
3721 ps->dtim_count--;
3722 }
e2ebc74d
JB		 3723
3724 tim = pos = (u8 *) skb_put(skb, 6);
3725 *pos++ = WLAN_EID_TIM;
3726 *pos++ = 4;
d012a605 3727 *pos++ = ps->dtim_count;
8860020e 3728 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 3729
d012a605 3730 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 3731 aid0 = 1;
3732
d012a605 3733 ps->dtim_bc_mc = aid0 == 1;
512119b3 3734
e2ebc74d
JB		 3735 if (have_bits) {
3736 /* Find largest even number N1 so that bits numbered 1 through
3737 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3738 * (N2 + 1) x 8 through 2007 are 0. */
3739 n1 = 0;
3740 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 3741 if (ps->tim[i]) {
e2ebc74d
JB		 3742 n1 = i & 0xfe;
3743 break;
3744 }
3745 }
3746 n2 = n1;
3747 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 3748 if (ps->tim[i]) {
e2ebc74d
JB		 3749 n2 = i;
3750 break;
3751 }
3752 }
3753
3754 /* Bitmap control */
3755 *pos++ = n1 | aid0;
3756 /* Part Virt Bitmap */
5220da39 3757 skb_put(skb, n2 - n1);
d012a605 3758 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 3759
3760 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 3761 } else {
3762 *pos++ = aid0; /* Bitmap control */
3763 *pos++ = 0; /* Part Virt Bitmap */
3764 }
e2ebc74d
JB		 3765}
3766
eac70c13 3767static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3768 struct ps_data *ps, struct sk_buff *skb,
3769 bool is_template)
eac70c13
MP		 3770{
3771 struct ieee80211_local *local = sdata->local;
3772
3773 /*
3774 * Not very nice, but we want to allow the driver to call
3775 * ieee80211_beacon_get() as a response to the set_tim()
3776 * callback. That, however, is already invoked under the
3777 * sta_lock to guarantee consistent and race-free update
3778 * of the tim bitmap in mac80211 and the driver.
3779 */
3780 if (local->tim_in_locked_section) {
6ec8c332 3781 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
eac70c13 3782 } else {
1b91731d 3783 spin_lock_bh(&local->tim_lock);
6ec8c332 3784 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
1b91731d 3785 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 3786 }
3787
3788 return 0;
3789}
3790
1af586c9
AO		 3791static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
3792 struct beacon_data *beacon)
73da7d5b
SW		 3793{
3794 struct probe_resp *resp;
cd7760e6
SW		 3795 u8 *beacon_data;
3796 size_t beacon_data_len;
0d06d9ba 3797 int i;
af296bdb 3798 u8 count = beacon->csa_current_counter;
cd7760e6
SW		 3799
3800 switch (sdata->vif.type) {
3801 case NL80211_IFTYPE_AP:
3802 beacon_data = beacon->tail;
3803 beacon_data_len = beacon->tail_len;
3804 break;
3805 case NL80211_IFTYPE_ADHOC:
3806 beacon_data = beacon->head;
3807 beacon_data_len = beacon->head_len;
3808 break;
b8456a14
CYY		 3809 case NL80211_IFTYPE_MESH_POINT:
3810 beacon_data = beacon->head;
3811 beacon_data_len = beacon->head_len;
3812 break;
cd7760e6
SW		 3813 default:
3814 return;
3815 }
73da7d5b 3816
af296bdb 3817 rcu_read_lock();
0d06d9ba 3818 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
af296bdb 3819 resp = rcu_dereference(sdata->u.ap.probe_resp);
0d06d9ba 3820
af296bdb
MK		 3821 if (beacon->csa_counter_offsets[i]) {
3822 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
3823 beacon_data_len)) {
0d06d9ba
AO		 3824 rcu_read_unlock();
3825 return;
3826 }
af296bdb
MK		 3827
3828 beacon_data[beacon->csa_counter_offsets[i]] = count;
73da7d5b 3829 }
af296bdb
MK		 3830
3831 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
3832 resp->data[resp->csa_counter_offsets[i]] = count;
73da7d5b 3833 }
af296bdb 3834 rcu_read_unlock();
1af586c9
AO		 3835}
3836
e996ec2a
WD		 3837static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
3838{
3839 beacon->csa_current_counter--;
3840
3841 /* the counter should never reach 0 */
3842 WARN_ON_ONCE(!beacon->csa_current_counter);
3843
3844 return beacon->csa_current_counter;
3845}
3846
1af586c9
AO		 3847u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
3848{
3849 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
af296bdb
MK		 3850 struct beacon_data *beacon = NULL;
3851 u8 count = 0;
0d06d9ba 3852
af296bdb
MK		 3853 rcu_read_lock();
3854
3855 if (sdata->vif.type == NL80211_IFTYPE_AP)
3856 beacon = rcu_dereference(sdata->u.ap.beacon);
3857 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3858 beacon = rcu_dereference(sdata->u.ibss.presp);
3859 else if (ieee80211_vif_is_mesh(&sdata->vif))
3860 beacon = rcu_dereference(sdata->u.mesh.beacon);
3861
3862 if (!beacon)
3863 goto unlock;
3864
e996ec2a 3865 count = __ieee80211_csa_update_counter(beacon);
1af586c9 3866
af296bdb
MK		 3867unlock:
3868 rcu_read_unlock();
3869 return count;
73da7d5b 3870}
1af586c9 3871EXPORT_SYMBOL(ieee80211_csa_update_counter);
73da7d5b
SW		 3872
3873bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
3874{
3875 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3876 struct beacon_data *beacon = NULL;
3877 u8 *beacon_data;
3878 size_t beacon_data_len;
73da7d5b
SW		 3879 int ret = false;
3880
3881 if (!ieee80211_sdata_running(sdata))
3882 return false;
3883
3884 rcu_read_lock();
3885 if (vif->type == NL80211_IFTYPE_AP) {
3886 struct ieee80211_if_ap *ap = &sdata->u.ap;
3887
3888 beacon = rcu_dereference(ap->beacon);
3889 if (WARN_ON(!beacon || !beacon->tail))
3890 goto out;
3891 beacon_data = beacon->tail;
3892 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 3893 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
3894 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3895
3896 beacon = rcu_dereference(ifibss->presp);
3897 if (!beacon)
3898 goto out;
3899
b8456a14
CYY		 3900 beacon_data = beacon->head;
3901 beacon_data_len = beacon->head_len;
3902 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
3903 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3904
3905 beacon = rcu_dereference(ifmsh->beacon);
3906 if (!beacon)
3907 goto out;
3908
cd7760e6
SW		 3909 beacon_data = beacon->head;
3910 beacon_data_len = beacon->head_len;
73da7d5b
SW		 3911 } else {
3912 WARN_ON(1);
3913 goto out;
3914 }
3915
10d78f27
MK		 3916 if (!beacon->csa_counter_offsets[0])
3917 goto out;
3918
af296bdb 3919 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 3920 goto out;
3921
af296bdb 3922 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
73da7d5b
SW		 3923 ret = true;
3924 out:
3925 rcu_read_unlock();
3926
3927 return ret;
3928}
3929EXPORT_SYMBOL(ieee80211_csa_is_complete);
3930
6ec8c332
AO		 3931static struct sk_buff *
3932__ieee80211_beacon_get(struct ieee80211_hw *hw,
3933 struct ieee80211_vif *vif,
3934 struct ieee80211_mutable_offsets *offs,
3935 bool is_template)
e2ebc74d
JB		 3936{
3937 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 3938 struct beacon_data *beacon = NULL;
9d139c81 3939 struct sk_buff *skb = NULL;
e039fa4a 3940 struct ieee80211_tx_info *info;
e2ebc74d 3941 struct ieee80211_sub_if_data *sdata = NULL;
57fbcce3 3942 enum nl80211_band band;
e00cfce0 3943 struct ieee80211_tx_rate_control txrc;
55de908a 3944 struct ieee80211_chanctx_conf *chanctx_conf;
1af586c9 3945 int csa_off_base = 0;
8318d78a 3946
5dfdaf58 3947 rcu_read_lock();
e2ebc74d 3948
32bfd35d 3949 sdata = vif_to_sdata(vif);
55de908a 3950 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 3951
55de908a 3952 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 3953 goto out;
3954
6ec8c332
AO		 3955 if (offs)
3956 memset(offs, 0, sizeof(*offs));
eddcbb94 3957
05c914fe 3958 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605 3959 struct ieee80211_if_ap *ap = &sdata->u.ap;
d012a605 3960
af296bdb 3961 beacon = rcu_dereference(ap->beacon);
3ad97fbc 3962 if (beacon) {
10d78f27 3963 if (beacon->csa_counter_offsets[0]) {
1af586c9 3964 if (!is_template)
e996ec2a 3965 __ieee80211_csa_update_counter(beacon);
1af586c9
AO		 3966
3967 ieee80211_set_csa(sdata, beacon);
3968 }
73da7d5b 3969
902acc78
JB		 3970 /*
3971 * headroom, head length,
3972 * tail length and maximum TIM length
3973 */
3974 skb = dev_alloc_skb(local->tx_headroom +
3975 beacon->head_len +
70dabeb7
FF		 3976 beacon->tail_len + 256 +
3977 local->hw.extra_beacon_tailroom);
902acc78
JB		 3978 if (!skb)
3979 goto out;
33b64eb2 3980
902acc78
JB		 3981 skb_reserve(skb, local->tx_headroom);
3982 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3983 beacon->head_len);
33b64eb2 3984
6ec8c332
AO		 3985 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
3986 is_template);
33b64eb2 3987
6ec8c332
AO		 3988 if (offs) {
3989 offs->tim_offset = beacon->head_len;
3990 offs->tim_length = skb->len - beacon->head_len;
1af586c9
AO		 3991
3992 /* for AP the csa offsets are from tail */
3993 csa_off_base = skb->len;
6ec8c332 3994 }
eddcbb94 3995
902acc78
JB		 3996 if (beacon->tail)
3997 memcpy(skb_put(skb, beacon->tail_len),
3998 beacon->tail, beacon->tail_len);
9d139c81
JB		 3999 } else
4000 goto out;
05c914fe 4001 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 4002 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 4003 struct ieee80211_hdr *hdr;
33b64eb2 4004
af296bdb
MK		 4005 beacon = rcu_dereference(ifibss->presp);
4006 if (!beacon)
9d139c81
JB		 4007 goto out;
4008
10d78f27 4009 if (beacon->csa_counter_offsets[0]) {
1af586c9 4010 if (!is_template)
e996ec2a 4011 __ieee80211_csa_update_counter(beacon);
cd7760e6 4012
af296bdb 4013 ieee80211_set_csa(sdata, beacon);
1af586c9 4014 }
cd7760e6 4015
af296bdb 4016 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 4017 local->hw.extra_beacon_tailroom);
9d139c81
JB		 4018 if (!skb)
4019 goto out;
c3ffeab4 4020 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 4021 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4022 beacon->head_len);
9d139c81
JB		 4023
4024 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 4025 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4026 IEEE80211_STYPE_BEACON);
902acc78 4027 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 4028 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 4029
af296bdb
MK		 4030 beacon = rcu_dereference(ifmsh->beacon);
4031 if (!beacon)
ac1bd846 4032 goto out;
ac1bd846 4033
10d78f27 4034 if (beacon->csa_counter_offsets[0]) {
1af586c9
AO		 4035 if (!is_template)
4036 /* TODO: For mesh csa_counter is in TU, so
4037 * decrementing it by one isn't correct, but
4038 * for now we leave it consistent with overall
4039 * mac80211's behavior.
4040 */
e996ec2a 4041 __ieee80211_csa_update_counter(beacon);
1af586c9 4042
af296bdb 4043 ieee80211_set_csa(sdata, beacon);
1af586c9 4044 }
b8456a14 4045
dbf498fb 4046 if (ifmsh->sync_ops)
af296bdb 4047 ifmsh->sync_ops->adjust_tbtt(sdata, beacon);
dbf498fb 4048
3b69a9c5 4049 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 4050 beacon->head_len +
3f52b7e3 4051 256 + /* TIM IE */
af296bdb 4052 beacon->tail_len +
70dabeb7 4053 local->hw.extra_beacon_tailroom);
902acc78
JB		 4054 if (!skb)
4055 goto out;
2b5e1967 4056 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 4057 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4058 beacon->head_len);
6ec8c332
AO		 4059 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4060
4061 if (offs) {
af296bdb
MK		 4062 offs->tim_offset = beacon->head_len;
4063 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 4064 }
4065
af296bdb
MK		 4066 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
4067 beacon->tail_len);
9d139c81
JB		 4068 } else {
4069 WARN_ON(1);
5dfdaf58 4070 goto out;
e2ebc74d
JB		 4071 }
4072
1af586c9 4073 /* CSA offsets */
af296bdb 4074 if (offs && beacon) {
1af586c9
AO		 4075 int i;
4076
4077 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
af296bdb 4078 u16 csa_off = beacon->csa_counter_offsets[i];
1af586c9
AO		 4079
4080 if (!csa_off)
4081 continue;
4082
4083 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4084 }
4085 }
4086
4bf88530 4087 band = chanctx_conf->def.chan->band;
55de908a 4088
e039fa4a
JB		 4089 info = IEEE80211_SKB_CB(skb);
4090
3b8d81e0 4091 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 4092 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 4093 info->band = band;
e00cfce0
JM		 4094
4095 memset(&txrc, 0, sizeof(txrc));
4096 txrc.hw = hw;
e31583cd 4097 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 4098 txrc.bss_conf = &sdata->vif.bss_conf;
4099 txrc.skb = skb;
4100 txrc.reported_rate.idx = -1;
37eb0b16 4101 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
e31583cd 4102 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
37eb0b16
JM		 4103 txrc.max_rate_idx = -1;
4104 else
4105 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
8f0729b1 4106 txrc.bss = true;
e00cfce0 4107 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 4108
4109 info->control.vif = vif;
f591fa5d 4110
a472e71b
JL		 4111 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4112 IEEE80211_TX_CTL_ASSIGN_SEQ |
4113 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 4114 out:
5dfdaf58 4115 rcu_read_unlock();
e2ebc74d 4116 return skb;
6ec8c332
AO		 4117
4118}
4119
4120struct sk_buff *
4121ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4122 struct ieee80211_vif *vif,
4123 struct ieee80211_mutable_offsets *offs)
4124{
4125 return __ieee80211_beacon_get(hw, vif, offs, true);
4126}
4127EXPORT_SYMBOL(ieee80211_beacon_get_template);
4128
4129struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4130 struct ieee80211_vif *vif,
4131 u16 *tim_offset, u16 *tim_length)
4132{
4133 struct ieee80211_mutable_offsets offs = {};
4134 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
35afa588
HS		 4135 struct sk_buff *copy;
4136 struct ieee80211_supported_band *sband;
4137 int shift;
4138
4139 if (!bcn)
4140 return bcn;
6ec8c332
AO		 4141
4142 if (tim_offset)
4143 *tim_offset = offs.tim_offset;
4144
4145 if (tim_length)
4146 *tim_length = offs.tim_length;
4147
35afa588
HS		 4148 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4149 !hw_to_local(hw)->monitors)
4150 return bcn;
4151
4152 /* send a copy to monitor interfaces */
4153 copy = skb_copy(bcn, GFP_ATOMIC);
4154 if (!copy)
4155 return bcn;
4156
4157 shift = ieee80211_vif_get_shift(vif);
4158 sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))];
4159 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4160
6ec8c332 4161 return bcn;
e2ebc74d 4162}
eddcbb94 4163EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 4164
02945821
AN		 4165struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4166 struct ieee80211_vif *vif)
4167{
4168 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 4169 struct sk_buff *skb = NULL;
4170 struct probe_resp *presp = NULL;
02945821
AN		 4171 struct ieee80211_hdr *hdr;
4172 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4173
4174 if (sdata->vif.type != NL80211_IFTYPE_AP)
4175 return NULL;
4176
4177 rcu_read_lock();
4178
4179 ap = &sdata->u.ap;
4180 presp = rcu_dereference(ap->probe_resp);
4181 if (!presp)
4182 goto out;
4183
aa7a0080 4184 skb = dev_alloc_skb(presp->len);
02945821
AN		 4185 if (!skb)
4186 goto out;
4187
aa7a0080
ES		 4188 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
4189
02945821
AN		 4190 hdr = (struct ieee80211_hdr *) skb->data;
4191 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4192
4193out:
4194 rcu_read_unlock();
4195 return skb;
4196}
4197EXPORT_SYMBOL(ieee80211_proberesp_get);
4198
7044cc56
KV		 4199struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4200 struct ieee80211_vif *vif)
4201{
4202 struct ieee80211_sub_if_data *sdata;
4203 struct ieee80211_if_managed *ifmgd;
4204 struct ieee80211_pspoll *pspoll;
4205 struct ieee80211_local *local;
4206 struct sk_buff *skb;
4207
4208 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4209 return NULL;
4210
4211 sdata = vif_to_sdata(vif);
4212 ifmgd = &sdata->u.mgd;
4213 local = sdata->local;
4214
4215 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 4216 if (!skb)
7044cc56 4217 return NULL;
d15b8459 4218
7044cc56
KV		 4219 skb_reserve(skb, local->hw.extra_tx_headroom);
4220
4221 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
4222 memset(pspoll, 0, sizeof(*pspoll));
4223 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4224 IEEE80211_STYPE_PSPOLL);
4225 pspoll->aid = cpu_to_le16(ifmgd->aid);
4226
4227 /* aid in PS-Poll has its two MSBs each set to 1 */
4228 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4229
4230 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4231 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4232
4233 return skb;
4234}
4235EXPORT_SYMBOL(ieee80211_pspoll_get);
4236
4237struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4238 struct ieee80211_vif *vif)
4239{
4240 struct ieee80211_hdr_3addr *nullfunc;
4241 struct ieee80211_sub_if_data *sdata;
4242 struct ieee80211_if_managed *ifmgd;
4243 struct ieee80211_local *local;
4244 struct sk_buff *skb;
4245
4246 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4247 return NULL;
4248
4249 sdata = vif_to_sdata(vif);
4250 ifmgd = &sdata->u.mgd;
4251 local = sdata->local;
4252
4253 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
d15b8459 4254 if (!skb)
7044cc56 4255 return NULL;
d15b8459 4256
7044cc56
KV		 4257 skb_reserve(skb, local->hw.extra_tx_headroom);
4258
4259 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
4260 sizeof(*nullfunc));
4261 memset(nullfunc, 0, sizeof(*nullfunc));
4262 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4263 IEEE80211_STYPE_NULLFUNC |
4264 IEEE80211_FCTL_TODS);
4265 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4266 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4267 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4268
4269 return skb;
4270}
4271EXPORT_SYMBOL(ieee80211_nullfunc_get);
4272
05e54ea6 4273struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 4274 const u8 *src_addr,
05e54ea6 4275 const u8 *ssid, size_t ssid_len,
b9a9ada1 4276 size_t tailroom)
05e54ea6 4277{
a344d677 4278 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 4279 struct ieee80211_hdr_3addr *hdr;
4280 struct sk_buff *skb;
4281 size_t ie_ssid_len;
4282 u8 *pos;
4283
05e54ea6
KV		 4284 ie_ssid_len = 2 + ssid_len;
4285
4286 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 4287 ie_ssid_len + tailroom);
d15b8459 4288 if (!skb)
05e54ea6 4289 return NULL;
05e54ea6
KV		 4290
4291 skb_reserve(skb, local->hw.extra_tx_headroom);
4292
4293 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
4294 memset(hdr, 0, sizeof(*hdr));
4295 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4296 IEEE80211_STYPE_PROBE_REQ);
e83e6541 4297 eth_broadcast_addr(hdr->addr1);
a344d677 4298 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 4299 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 4300
4301 pos = skb_put(skb, ie_ssid_len);
4302 *pos++ = WLAN_EID_SSID;
4303 *pos++ = ssid_len;
88c868c4 4304 if (ssid_len)
05e54ea6
KV		 4305 memcpy(pos, ssid, ssid_len);
4306 pos += ssid_len;
4307
05e54ea6
KV		 4308 return skb;
4309}
4310EXPORT_SYMBOL(ieee80211_probereq_get);
4311
32bfd35d 4312void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4313 const void *frame, size_t frame_len,
e039fa4a 4314 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4315 struct ieee80211_rts *rts)
4316{
4317 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4318
065e9605
HH		 4319 rts->frame_control =
4320 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 4321 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4322 frame_txctl);
e2ebc74d
JB		 4323 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4324 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4325}
4326EXPORT_SYMBOL(ieee80211_rts_get);
4327
32bfd35d 4328void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4329 const void *frame, size_t frame_len,
e039fa4a 4330 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4331 struct ieee80211_cts *cts)
4332{
4333 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4334
065e9605
HH		 4335 cts->frame_control =
4336 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 4337 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4338 frame_len, frame_txctl);
e2ebc74d
JB		 4339 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4340}
4341EXPORT_SYMBOL(ieee80211_ctstoself_get);
4342
4343struct sk_buff *
32bfd35d 4344ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 4345 struct ieee80211_vif *vif)
e2ebc74d
JB		 4346{
4347 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 4348 struct sk_buff *skb = NULL;
5cf121c3 4349 struct ieee80211_tx_data tx;
e2ebc74d 4350 struct ieee80211_sub_if_data *sdata;
d012a605 4351 struct ps_data *ps;
e039fa4a 4352 struct ieee80211_tx_info *info;
55de908a 4353 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 4354
32bfd35d 4355 sdata = vif_to_sdata(vif);
5dfdaf58 4356
5dfdaf58 4357 rcu_read_lock();
55de908a 4358 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 4359
d012a605
MP		 4360 if (!chanctx_conf)
4361 goto out;
4362
4363 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4364 struct beacon_data *beacon =
4365 rcu_dereference(sdata->u.ap.beacon);
4366
4367 if (!beacon || !beacon->head)
4368 goto out;
4369
4370 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 4371 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4372 ps = &sdata->u.mesh.ps;
d012a605 4373 } else {
747cf5e9 4374 goto out;
d012a605 4375 }
5dfdaf58 4376
d012a605 4377 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 4378 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 4379
e2ebc74d 4380 while (1) {
d012a605 4381 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 4382 if (!skb)
747cf5e9 4383 goto out;
e2ebc74d
JB		 4384 local->total_ps_buffered--;
4385
d012a605 4386 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 4387 struct ieee80211_hdr *hdr =
4388 (struct ieee80211_hdr *) skb->data;
4389 /* more buffered multicast/broadcast frames ==> set
4390 * MoreData flag in IEEE 802.11 header to inform PS
4391 * STAs */
4392 hdr->frame_control |=
4393 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4394 }
4395
112c44b2 4396 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 4397 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 4398 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 4399 break;
6b07d9ca 4400 ieee80211_free_txskb(hw, skb);
e2ebc74d 4401 }
e039fa4a
JB		 4402
4403 info = IEEE80211_SKB_CB(skb);
4404
5cf121c3 4405 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 4406 info->band = chanctx_conf->def.chan->band;
e2ebc74d 4407
97b045d6 4408 if (invoke_tx_handlers(&tx))
e2ebc74d 4409 skb = NULL;
97b045d6 4410 out:
d0709a65 4411 rcu_read_unlock();
e2ebc74d
JB		 4412
4413 return skb;
4414}
4415EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 4416
b6da911b
LK		 4417int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4418{
4419 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4420 struct ieee80211_sub_if_data *sdata = sta->sdata;
4421 struct ieee80211_local *local = sdata->local;
4422 int ret;
4423 u32 queues;
4424
4425 lockdep_assert_held(&local->sta_mtx);
4426
4427 /* only some cases are supported right now */
4428 switch (sdata->vif.type) {
4429 case NL80211_IFTYPE_STATION:
4430 case NL80211_IFTYPE_AP:
4431 case NL80211_IFTYPE_AP_VLAN:
4432 break;
4433 default:
4434 WARN_ON(1);
4435 return -EINVAL;
4436 }
4437
4438 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4439 return -EINVAL;
4440
4441 if (sta->reserved_tid == tid) {
4442 ret = 0;
4443 goto out;
4444 }
4445
4446 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4447 sdata_err(sdata, "TID reservation already active\n");
4448 ret = -EALREADY;
4449 goto out;
4450 }
4451
4452 ieee80211_stop_vif_queues(sdata->local, sdata,
4453 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4454
4455 synchronize_net();
4456
4457 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 4458 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 4459 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4460 __ieee80211_stop_tx_ba_session(sta, tid,
4461 AGG_STOP_LOCAL_REQUEST);
4462 }
4463
4464 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 4465 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 4466
4467 sta->reserved_tid = tid;
4468
4469 ieee80211_wake_vif_queues(local, sdata,
4470 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4471
30686bf7 4472 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 4473 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4474
4475 ret = 0;
4476 out:
4477 return ret;
4478}
4479EXPORT_SYMBOL(ieee80211_reserve_tid);
4480
4481void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4482{
4483 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4484 struct ieee80211_sub_if_data *sdata = sta->sdata;
4485
4486 lockdep_assert_held(&sdata->local->sta_mtx);
4487
4488 /* only some cases are supported right now */
4489 switch (sdata->vif.type) {
4490 case NL80211_IFTYPE_STATION:
4491 case NL80211_IFTYPE_AP:
4492 case NL80211_IFTYPE_AP_VLAN:
4493 break;
4494 default:
4495 WARN_ON(1);
4496 return;
4497 }
4498
4499 if (tid != sta->reserved_tid) {
4500 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4501 return;
4502 }
4503
4504 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4505}
4506EXPORT_SYMBOL(ieee80211_unreserve_tid);
4507
55de908a
JB		 4508void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4509 struct sk_buff *skb, int tid,
57fbcce3 4510 enum nl80211_band band)
3b8d81e0 4511{
353d09c6 4512 int ac = ieee802_1d_to_ac[tid & 7];
3a25a8c8 4513
d57a544d 4514 skb_reset_mac_header(skb);
3a25a8c8 4515 skb_set_queue_mapping(skb, ac);
cf6bb79a 4516 skb->priority = tid;
cf0277e7 4517
89afe614
JB		 4518 skb->dev = sdata->dev;
4519
3d34deb6
JB		 4520 /*
4521 * The other path calling ieee80211_xmit is from the tasklet,
4522 * and while we can handle concurrent transmissions locking
4523 * requirements are that we do not come into tx with bhs on.
4524 */
4525 local_bh_disable();
73c4e195 4526 IEEE80211_SKB_CB(skb)->band = band;
7c10770f 4527 ieee80211_xmit(sdata, NULL, skb);
3d34deb6 4528 local_bh_enable();
3b8d81e0 4529}
Linux 6.x block layer and io_uring tree(s)