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mac80211: Move reorder-sensitive TX handlers to after TXQ dequeue
[mirror_ubuntu-artful-kernel.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 }
29623892
JB		 334 } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
335 ieee80211_is_data(hdr->frame_control) &&
030ef8f8 336 !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
29623892
JB		 337 /*
338 * No associated STAs - no need to send multicast
339 * frames.
340 */
341 return TX_DROP;
e2ebc74d
JB		 342 }
343
9ae54c84 344 return TX_CONTINUE;
e2ebc74d
JB		 345}
346
e2ebc74d
JB		 347/* This function is called whenever the AP is about to exceed the maximum limit
348 * of buffered frames for power saving STAs. This situation should not really
349 * happen often during normal operation, so dropping the oldest buffered packet
350 * from each queue should be OK to make some room for new frames. */
351static void purge_old_ps_buffers(struct ieee80211_local *local)
352{
353 int total = 0, purged = 0;
354 struct sk_buff *skb;
355 struct ieee80211_sub_if_data *sdata;
356 struct sta_info *sta;
357
79010420 358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 359 struct ps_data *ps;
360
361 if (sdata->vif.type == NL80211_IFTYPE_AP)
362 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 363 else if (ieee80211_vif_is_mesh(&sdata->vif))
364 ps = &sdata->u.mesh.ps;
d012a605 365 else
e2ebc74d 366 continue;
d012a605
MP		 367
368 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 369 if (skb) {
370 purged++;
6b07d9ca 371 ieee80211_free_txskb(&local->hw, skb);
e2ebc74d 372 }
d012a605 373 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 374 }
e2ebc74d 375
948d887d
JB		 376 /*
377 * Drop one frame from each station from the lowest-priority
378 * AC that has frames at all.
379 */
d0709a65 380 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 381 int ac;
382
383 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
384 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
385 total += skb_queue_len(&sta->ps_tx_buf[ac]);
386 if (skb) {
387 purged++;
c3e7724b 388 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 389 break;
390 }
e2ebc74d 391 }
e2ebc74d 392 }
d0709a65 393
e2ebc74d 394 local->total_ps_buffered = total;
bdcbd8e0 395 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 396}
397
9ae54c84 398static ieee80211_tx_result
5cf121c3 399ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 400{
e039fa4a 401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 403 struct ps_data *ps;
e039fa4a 404
7d54d0dd
JB		 405 /*
406 * broadcast/multicast frame
407 *
3f52b7e3 408 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 409 * the frame is buffered to be sent after DTIM beacon frame.
410 * This is done either by the hardware or us.
411 */
412
3f52b7e3 413 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 414 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
415 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
416 if (!tx->sdata->bss)
417 return TX_CONTINUE;
418
419 ps = &tx->sdata->bss->ps;
3f52b7e3
MP		 420 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
421 ps = &tx->sdata->u.mesh.ps;
d012a605 422 } else {
3e122be0 423 return TX_CONTINUE;
d012a605
MP		 424 }
425
3e122be0
JB		 426
427 /* no buffering for ordered frames */
358c8d9d 428 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 429 return TX_CONTINUE;
7d54d0dd 430
08b99399
JB		 431 if (ieee80211_is_probe_req(hdr->frame_control))
432 return TX_CONTINUE;
433
30686bf7 434 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
f4d57941
JB		 435 info->hw_queue = tx->sdata->vif.cab_queue;
436
7d54d0dd 437 /* no stations in PS mode */
d012a605 438 if (!atomic_read(&ps->num_sta_ps))
9ae54c84 439 return TX_CONTINUE;
7d54d0dd 440
62b517cb 441 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
62b1208e 442
62b517cb 443 /* device releases frame after DTIM beacon */
30686bf7 444 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
62b1208e 445 return TX_CONTINUE;
62b1208e 446
7d54d0dd 447 /* buffered in mac80211 */
62b1208e
JB		 448 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
449 purge_old_ps_buffers(tx->local);
450
d012a605 451 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 452 ps_dbg(tx->sdata,
453 "BC TX buffer full - dropping the oldest frame\n");
6b07d9ca 454 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
62b1208e
JB		 455 } else
456 tx->local->total_ps_buffered++;
e2ebc74d 457
d012a605 458 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 459
62b1208e 460 return TX_QUEUED;
e2ebc74d
JB		 461}
462
fb733336
JM		 463static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
464 struct sk_buff *skb)
465{
466 if (!ieee80211_is_mgmt(fc))
467 return 0;
468
c2c98fde 469 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 470 return 0;
471
d8ca16db 472 if (!ieee80211_is_robust_mgmt_frame(skb))
fb733336
JM		 473 return 0;
474
475 return 1;
476}
477
9ae54c84 478static ieee80211_tx_result
5cf121c3 479ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 480{
481 struct sta_info *sta = tx->sta;
e039fa4a 482 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
08b99399 483 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 484 struct ieee80211_local *local = tx->local;
e2ebc74d 485
02f2f1a9 486 if (unlikely(!sta))
9ae54c84 487 return TX_CONTINUE;
e2ebc74d 488
c2c98fde 489 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
5ac2e350
JB		 490 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
491 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
02f2f1a9 492 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 493 int ac = skb_get_queue_mapping(tx->skb);
494
08b99399
JB		 495 if (ieee80211_is_mgmt(hdr->frame_control) &&
496 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
497 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
498 return TX_CONTINUE;
499 }
500
bdcbd8e0
JB		 501 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
502 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 503 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
504 purge_old_ps_buffers(tx->local);
1d147bfa
EG		 505
506 /* sync with ieee80211_sta_ps_deliver_wakeup */
507 spin_lock(&sta->ps_lock);
508 /*
509 * STA woke up the meantime and all the frames on ps_tx_buf have
510 * been queued to pending queue. No reordering can happen, go
511 * ahead and Tx the packet.
512 */
513 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
5ac2e350
JB		 514 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
515 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
1d147bfa
EG		 516 spin_unlock(&sta->ps_lock);
517 return TX_CONTINUE;
518 }
519
948d887d
JB		 520 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
521 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
bdcbd8e0
JB		 522 ps_dbg(tx->sdata,
523 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
524 sta->sta.addr, ac);
c3e7724b 525 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 526 } else
527 tx->local->total_ps_buffered++;
004c872e 528
e039fa4a 529 info->control.jiffies = jiffies;
5061b0c2 530 info->control.vif = &tx->sdata->vif;
8f77f384 531 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
03c8c06f 532 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
948d887d 533 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
1d147bfa 534 spin_unlock(&sta->ps_lock);
3393a608
JO		 535
536 if (!timer_pending(&local->sta_cleanup))
537 mod_timer(&local->sta_cleanup,
538 round_jiffies(jiffies +
539 STA_INFO_CLEANUP_INTERVAL));
540
c868cb35
JB		 541 /*
542 * We queued up some frames, so the TIM bit might
543 * need to be set, recalculate it.
544 */
545 sta_info_recalc_tim(sta);
546
9ae54c84 547 return TX_QUEUED;
bdcbd8e0
JB		 548 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
549 ps_dbg(tx->sdata,
550 "STA %pM in PS mode, but polling/in SP -> send frame\n",
551 sta->sta.addr);
e2ebc74d 552 }
e2ebc74d 553
9ae54c84 554 return TX_CONTINUE;
e2ebc74d
JB		 555}
556
d9e8a70f 557static ieee80211_tx_result debug_noinline
5cf121c3 558ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 559{
5cf121c3 560 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 561 return TX_CONTINUE;
e2ebc74d 562
5cf121c3 563 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 564 return ieee80211_tx_h_unicast_ps_buf(tx);
565 else
566 return ieee80211_tx_h_multicast_ps_buf(tx);
567}
568
a621fa4d
JB		 569static ieee80211_tx_result debug_noinline
570ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
571{
572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
573
af61a165
JB		 574 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
575 if (tx->sdata->control_port_no_encrypt)
576 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
577 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
9c1c98a3 578 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
af61a165 579 }
a621fa4d
JB		 580
581 return TX_CONTINUE;
582}
583
d9e8a70f 584static ieee80211_tx_result debug_noinline
5cf121c3 585ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 586{
46e6de15 587 struct ieee80211_key *key;
e039fa4a 588 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 589 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 590
3b8d81e0 591 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
e2ebc74d 592 tx->key = NULL;
2475b1cc
MS		 593 else if (tx->sta &&
594 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
d4e46a3d 595 tx->key = key;
46f6b060
MH		 596 else if (ieee80211_is_group_privacy_action(tx->skb) &&
597 (key = rcu_dereference(tx->sdata->default_multicast_key)))
598 tx->key = key;
3cfcf6ac 599 else if (ieee80211_is_mgmt(hdr->frame_control) &&
ecbcd324 600 is_multicast_ether_addr(hdr->addr1) &&
d8ca16db 601 ieee80211_is_robust_mgmt_frame(tx->skb) &&
3cfcf6ac
JM		 602 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
603 tx->key = key;
f7e0104c
JB		 604 else if (is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_multicast_key)))
606 tx->key = key;
607 else if (!is_multicast_ether_addr(hdr->addr1) &&
608 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 609 tx->key = key;
e8f4fb7c 610 else
4922f71f 611 tx->key = NULL;
e2ebc74d
JB		 612
613 if (tx->key) {
813d7669
JB		 614 bool skip_hw = false;
615
011bfcc4 616 /* TODO: add threshold stuff again */
176e4f84 617
97359d12
JB		 618 switch (tx->key->conf.cipher) {
619 case WLAN_CIPHER_SUITE_WEP40:
620 case WLAN_CIPHER_SUITE_WEP104:
97359d12 621 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 622 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 623 tx->key = NULL;
624 break;
97359d12 625 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db 626 case WLAN_CIPHER_SUITE_CCMP_256:
00b9cfa3
JM		 627 case WLAN_CIPHER_SUITE_GCMP:
628 case WLAN_CIPHER_SUITE_GCMP_256:
fb733336
JM		 629 if (!ieee80211_is_data_present(hdr->frame_control) &&
630 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
46f6b060
MH		 631 tx->skb) &&
632 !ieee80211_is_group_privacy_action(tx->skb))
fb733336 633 tx->key = NULL;
3b43a187
KV		 634 else
635 skip_hw = (tx->key->conf.flags &
e548c49e 636 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 637 ieee80211_is_mgmt(hdr->frame_control);
fb733336 638 break;
97359d12 639 case WLAN_CIPHER_SUITE_AES_CMAC:
56c52da2 640 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
8ade538b
JM		 641 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
642 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3cfcf6ac
JM		 643 if (!ieee80211_is_mgmt(hdr->frame_control))
644 tx->key = NULL;
645 break;
176e4f84 646 }
813d7669 647
e54faf29
JB		 648 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
649 !ieee80211_is_deauth(hdr->frame_control)))
95acac61
JB		 650 return TX_DROP;
651
f12553eb 652 if (!skip_hw && tx->key &&
382b1655 653 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 654 info->control.hw_key = &tx->key->conf;
e2ebc74d
JB		 655 }
656
9ae54c84 657 return TX_CONTINUE;
e2ebc74d
JB		 658}
659
d9e8a70f 660static ieee80211_tx_result debug_noinline
5cf121c3 661ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 662{
e039fa4a 663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 664 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
665 struct ieee80211_supported_band *sband;
a2c40249 666 u32 len;
e6a9854b 667 struct ieee80211_tx_rate_control txrc;
0d528d85 668 struct ieee80211_sta_rates *ratetbl = NULL;
c2c98fde 669 bool assoc = false;
8318d78a 670
e6a9854b 671 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 672
2d56577b 673 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 674
a2c40249 675 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 676 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 677
678 /* set up the tx rate control struct we give the RC algo */
005e472b 679 txrc.hw = &tx->local->hw;
e6a9854b
JB		 680 txrc.sband = sband;
681 txrc.bss_conf = &tx->sdata->vif.bss_conf;
682 txrc.skb = tx->skb;
683 txrc.reported_rate.idx = -1;
2d56577b 684 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
37eb0b16
JM		 685 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
686 txrc.max_rate_idx = -1;
687 else
688 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
2ffbe6d3
FF		 689
690 if (tx->sdata->rc_has_mcs_mask[info->band])
691 txrc.rate_idx_mcs_mask =
692 tx->sdata->rc_rateidx_mcs_mask[info->band];
693
8f0729b1 694 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 695 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 696 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
697 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 698
699 /* set up RTS protection if desired */
b9a5f8ca 700 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 701 txrc.rts = true;
e2ebc74d 702 }
e2ebc74d 703
0d528d85 704 info->control.use_rts = txrc.rts;
991fec09
FF		 705 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
706
e6a9854b
JB		 707 /*
708 * Use short preamble if the BSS can handle it, but not for
709 * management frames unless we know the receiver can handle
710 * that -- the management frame might be to a station that
711 * just wants a probe response.
712 */
713 if (tx->sdata->vif.bss_conf.use_short_preamble &&
714 (ieee80211_is_data(hdr->frame_control) ||
c2c98fde 715 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 716 txrc.short_preamble = true;
717
718 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 719
dfdfc2be
SE		 720 /* don't ask rate control when rate already injected via radiotap */
721 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
722 return TX_CONTINUE;
723
c2c98fde
JB		 724 if (tx->sta)
725 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 726
727 /*
728 * Lets not bother rate control if we're associated and cannot
729 * talk to the sta. This should not happen.
730 */
c2c98fde 731 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 732 !rate_usable_index_exists(sband, &tx->sta->sta),
733 "%s: Dropped data frame as no usable bitrate found while "
734 "scanning and associated. Target station: "
735 "%pM on %d GHz band\n",
47846c9b 736 tx->sdata->name, hdr->addr1,
2d56577b 737 info->band ? 5 : 2))
b770b43e 738 return TX_DROP;
2e92e6f2 739
b770b43e
LR		 740 /*
741 * If we're associated with the sta at this point we know we can at
742 * least send the frame at the lowest bit rate.
743 */
e6a9854b
JB		 744 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
745
0d528d85
FF		 746 if (tx->sta && !info->control.skip_table)
747 ratetbl = rcu_dereference(tx->sta->sta.rates);
748
749 if (unlikely(info->control.rates[0].idx < 0)) {
750 if (ratetbl) {
751 struct ieee80211_tx_rate rate = {
752 .idx = ratetbl->rate[0].idx,
753 .flags = ratetbl->rate[0].flags,
754 .count = ratetbl->rate[0].count
755 };
756
757 if (ratetbl->rate[0].idx < 0)
758 return TX_DROP;
759
760 tx->rate = rate;
761 } else {
762 return TX_DROP;
763 }
764 } else {
765 tx->rate = info->control.rates[0];
766 }
e6a9854b 767
c1ce5a74 768 if (txrc.reported_rate.idx < 0) {
0d528d85 769 txrc.reported_rate = tx->rate;
c1ce5a74 770 if (tx->sta && ieee80211_is_data(hdr->frame_control))
e5a9f8d0 771 tx->sta->tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 772 } else if (tx->sta)
e5a9f8d0 773 tx->sta->tx_stats.last_rate = txrc.reported_rate;
e039fa4a 774
0d528d85
FF		 775 if (ratetbl)
776 return TX_CONTINUE;
777
e6a9854b
JB		 778 if (unlikely(!info->control.rates[0].count))
779 info->control.rates[0].count = 1;
e2ebc74d 780
9955151d
GS		 781 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
782 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
783 info->control.rates[0].count = 1;
784
e6a9854b
JB		 785 return TX_CONTINUE;
786}
787
ba8c3d6f
FF		 788static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
789{
790 u16 *seq = &sta->tid_seq[tid];
791 __le16 ret = cpu_to_le16(*seq);
792
793 /* Increase the sequence number. */
794 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
795
796 return ret;
797}
798
f591fa5d
JB		 799static ieee80211_tx_result debug_noinline
800ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
801{
802 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
803 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 804 u8 *qc;
805 int tid;
806
25d834e1
JB		 807 /*
808 * Packet injection may want to control the sequence
809 * number, if we have no matching interface then we
810 * neither assign one ourselves nor ask the driver to.
811 */
5061b0c2 812 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 813 return TX_CONTINUE;
814
f591fa5d
JB		 815 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
816 return TX_CONTINUE;
817
818 if (ieee80211_hdrlen(hdr->frame_control) < 24)
819 return TX_CONTINUE;
820
49a59543
JB		 821 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
822 return TX_CONTINUE;
823
94778280
JB		 824 /*
825 * Anything but QoS data that has a sequence number field
826 * (is long enough) gets a sequence number from the global
c4c205f3
BC		 827 * counter. QoS data frames with a multicast destination
828 * also use the global counter (802.11-2012 9.3.2.10).
94778280 829 */
c4c205f3
BC		 830 if (!ieee80211_is_data_qos(hdr->frame_control) ||
831 is_multicast_ether_addr(hdr->addr1)) {
94778280 832 /* driver should assign sequence number */
f591fa5d 833 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 834 /* for pure STA mode without beacons, we can do it */
835 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
836 tx->sdata->sequence_number += 0x10;
79c892b8 837 if (tx->sta)
e5a9f8d0 838 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 839 return TX_CONTINUE;
840 }
841
842 /*
843 * This should be true for injected/management frames only, for
844 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
845 * above since they are not QoS-data frames.
846 */
847 if (!tx->sta)
848 return TX_CONTINUE;
849
850 /* include per-STA, per-TID sequence counter */
851
852 qc = ieee80211_get_qos_ctl(hdr);
853 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
e5a9f8d0 854 tx->sta->tx_stats.msdu[tid]++;
f591fa5d 855
bb42f2d1 856 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
f591fa5d
JB		 857
858 return TX_CONTINUE;
859}
860
252b86c4 861static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 862 struct sk_buff *skb, int hdrlen,
863 int frag_threshold)
864{
252b86c4 865 struct ieee80211_local *local = tx->local;
a1a3fcec 866 struct ieee80211_tx_info *info;
252b86c4 867 struct sk_buff *tmp;
2de8e0d9
JB		 868 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
869 int pos = hdrlen + per_fragm;
870 int rem = skb->len - hdrlen - per_fragm;
871
872 if (WARN_ON(rem < 0))
873 return -EINVAL;
874
252b86c4
JB		 875 /* first fragment was already added to queue by caller */
876
2de8e0d9
JB		 877 while (rem) {
878 int fraglen = per_fragm;
879
880 if (fraglen > rem)
881 fraglen = rem;
882 rem -= fraglen;
883 tmp = dev_alloc_skb(local->tx_headroom +
884 frag_threshold +
2475b1cc 885 tx->sdata->encrypt_headroom +
2de8e0d9
JB		 886 IEEE80211_ENCRYPT_TAILROOM);
887 if (!tmp)
888 return -ENOMEM;
252b86c4
JB		 889
890 __skb_queue_tail(&tx->skbs, tmp);
891
2475b1cc
MS		 892 skb_reserve(tmp,
893 local->tx_headroom + tx->sdata->encrypt_headroom);
894
2de8e0d9
JB		 895 /* copy control information */
896 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 897
898 info = IEEE80211_SKB_CB(tmp);
899 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
900 IEEE80211_TX_CTL_FIRST_FRAGMENT);
901
902 if (rem)
903 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
904
2de8e0d9
JB		 905 skb_copy_queue_mapping(tmp, skb);
906 tmp->priority = skb->priority;
2de8e0d9 907 tmp->dev = skb->dev;
2de8e0d9
JB		 908
909 /* copy header and data */
910 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
911 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
912
913 pos += fraglen;
914 }
915
252b86c4 916 /* adjust first fragment's length */
338f977f 917 skb_trim(skb, hdrlen + per_fragm);
2de8e0d9
JB		 918 return 0;
919}
920
d9e8a70f 921static ieee80211_tx_result debug_noinline
e2454948
JB		 922ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
923{
2de8e0d9
JB		 924 struct sk_buff *skb = tx->skb;
925 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
926 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 927 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 928 int hdrlen;
929 int fragnum;
e2454948 930
252b86c4
JB		 931 /* no matter what happens, tx->skb moves to tx->skbs */
932 __skb_queue_tail(&tx->skbs, skb);
933 tx->skb = NULL;
934
a26eb27a
JB		 935 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
936 return TX_CONTINUE;
937
938 if (tx->local->ops->set_frag_threshold)
e2454948
JB		 939 return TX_CONTINUE;
940
eefce91a
JB		 941 /*
942 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 943 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 944 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 945 */
8b30b1fe 946 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 947 return TX_DROP;
948
065e9605 949 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 950
a26eb27a 951 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 952 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 953 return TX_DROP;
e6a9854b 954
2de8e0d9
JB		 955 /*
956 * Now fragment the frame. This will allocate all the fragments and
957 * chain them (using skb as the first fragment) to skb->next.
958 * During transmission, we will remove the successfully transmitted
959 * fragments from this list. When the low-level driver rejects one
960 * of the fragments then we will simply pretend to accept the skb
961 * but store it away as pending.
962 */
252b86c4 963 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 964 return TX_DROP;
e6a9854b 965
2de8e0d9
JB		 966 /* update duration/seq/flags of fragments */
967 fragnum = 0;
252b86c4
JB		 968
969 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 970 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 971
2de8e0d9
JB		 972 hdr = (void *)skb->data;
973 info = IEEE80211_SKB_CB(skb);
e6a9854b 974
252b86c4 975 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 976 hdr->frame_control |= morefrags;
e6a9854b
JB		 977 /*
978 * No multi-rate retries for fragmented frames, that
979 * would completely throw off the NAV at other STAs.
980 */
981 info->control.rates[1].idx = -1;
982 info->control.rates[2].idx = -1;
983 info->control.rates[3].idx = -1;
e3e1a0bc 984 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 985 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 986 } else {
987 hdr->frame_control &= ~morefrags;
e6a9854b 988 }
2de8e0d9
JB		 989 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
990 fragnum++;
252b86c4 991 }
e2ebc74d 992
9ae54c84 993 return TX_CONTINUE;
e2ebc74d
JB		 994}
995
feff1f2f
JB		 996static ieee80211_tx_result debug_noinline
997ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
998{
252b86c4 999 struct sk_buff *skb;
560d2682 1000 int ac = -1;
feff1f2f
JB		 1001
1002 if (!tx->sta)
1003 return TX_CONTINUE;
1004
252b86c4 1005 skb_queue_walk(&tx->skbs, skb) {
560d2682 1006 ac = skb_get_queue_mapping(skb);
e5a9f8d0 1007 tx->sta->tx_stats.bytes[ac] += skb->len;
252b86c4 1008 }
560d2682 1009 if (ac >= 0)
e5a9f8d0 1010 tx->sta->tx_stats.packets[ac]++;
feff1f2f
JB		 1011
1012 return TX_CONTINUE;
1013}
1014
d9e8a70f 1015static ieee80211_tx_result debug_noinline
e2454948
JB		 1016ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1017{
1018 if (!tx->key)
1019 return TX_CONTINUE;
1020
97359d12
JB		 1021 switch (tx->key->conf.cipher) {
1022 case WLAN_CIPHER_SUITE_WEP40:
1023 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1024 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1025 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1026 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1027 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 1028 return ieee80211_crypto_ccmp_encrypt(
1029 tx, IEEE80211_CCMP_MIC_LEN);
1030 case WLAN_CIPHER_SUITE_CCMP_256:
1031 return ieee80211_crypto_ccmp_encrypt(
1032 tx, IEEE80211_CCMP_256_MIC_LEN);
97359d12 1033 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1034 return ieee80211_crypto_aes_cmac_encrypt(tx);
56c52da2
JM		 1035 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1036 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
8ade538b
JM		 1037 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1038 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1039 return ieee80211_crypto_aes_gmac_encrypt(tx);
00b9cfa3
JM		 1040 case WLAN_CIPHER_SUITE_GCMP:
1041 case WLAN_CIPHER_SUITE_GCMP_256:
1042 return ieee80211_crypto_gcmp_encrypt(tx);
3ffc2a90 1043 default:
d32a1028 1044 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1045 }
1046
e2454948
JB		 1047 return TX_DROP;
1048}
1049
d9e8a70f 1050static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1051ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1052{
252b86c4 1053 struct sk_buff *skb;
2de8e0d9
JB		 1054 struct ieee80211_hdr *hdr;
1055 int next_len;
1056 bool group_addr;
03f93c3d 1057
252b86c4 1058 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1059 hdr = (void *) skb->data;
7e0aae47
JM		 1060 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1061 break; /* must not overwrite AID */
252b86c4
JB		 1062 if (!skb_queue_is_last(&tx->skbs, skb)) {
1063 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1064 next_len = next->len;
1065 } else
1066 next_len = 0;
2de8e0d9 1067 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1068
2de8e0d9 1069 hdr->duration_id =
252b86c4
JB		 1070 ieee80211_duration(tx, skb, group_addr, next_len);
1071 }
03f93c3d
JB		 1072
1073 return TX_CONTINUE;
1074}
1075
e2ebc74d
JB		 1076/* actual transmit path */
1077
a622ab72
JB		 1078static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1079 struct sk_buff *skb,
1080 struct ieee80211_tx_info *info,
1081 struct tid_ampdu_tx *tid_tx,
1082 int tid)
1083{
1084 bool queued = false;
285fa695 1085 bool reset_agg_timer = false;
aa454580 1086 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1087
1088 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1089 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1090 reset_agg_timer = true;
0ab33703
JB		 1091 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1092 /*
1093 * nothing -- this aggregation session is being started
1094 * but that might still fail with the driver
1095 */
ba8c3d6f 1096 } else if (!tx->sta->sta.txq[tid]) {
a622ab72
JB		 1097 spin_lock(&tx->sta->lock);
1098 /*
1099 * Need to re-check now, because we may get here
1100 *
1101 * 1) in the window during which the setup is actually
1102 * already done, but not marked yet because not all
1103 * packets are spliced over to the driver pending
1104 * queue yet -- if this happened we acquire the lock
1105 * either before or after the splice happens, but
1106 * need to recheck which of these cases happened.
1107 *
1108 * 2) during session teardown, if the OPERATIONAL bit
1109 * was cleared due to the teardown but the pointer
1110 * hasn't been assigned NULL yet (or we loaded it
1111 * before it was assigned) -- in this case it may
1112 * now be NULL which means we should just let the
1113 * packet pass through because splicing the frames
1114 * back is already done.
1115 */
40b275b6 1116 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1117
1118 if (!tid_tx) {
1119 /* do nothing, let packet pass through */
1120 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1121 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1122 reset_agg_timer = true;
a622ab72
JB		 1123 } else {
1124 queued = true;
f6d4671a
EG		 1125 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1126 clear_sta_flag(tx->sta, WLAN_STA_SP);
1127 ps_dbg(tx->sta->sdata,
1128 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1129 tx->sta->sta.addr, tx->sta->sta.aid);
1130 }
a622ab72
JB		 1131 info->control.vif = &tx->sdata->vif;
1132 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
facde7f3 1133 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
a622ab72 1134 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1135 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1136 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1137 }
1138 spin_unlock(&tx->sta->lock);
aa454580
HS		 1139
1140 if (purge_skb)
c3e7724b 1141 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1142 }
1143
285fa695
NM		 1144 /* reset session timer */
1145 if (reset_agg_timer && tid_tx->timeout)
12d3952f 1146 tid_tx->last_tx = jiffies;
285fa695 1147
a622ab72
JB		 1148 return queued;
1149}
1150
58d4185e
JB		 1151/*
1152 * initialises @tx
7c10770f
JB		 1153 * pass %NULL for the station if unknown, a valid pointer if known
1154 * or an ERR_PTR() if the station is known not to exist
58d4185e 1155 */
9ae54c84 1156static ieee80211_tx_result
3b8d81e0
JB		 1157ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1158 struct ieee80211_tx_data *tx,
7c10770f 1159 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1160{
3b8d81e0 1161 struct ieee80211_local *local = sdata->local;
58d4185e 1162 struct ieee80211_hdr *hdr;
e039fa4a 1163 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1164 int tid;
a622ab72 1165 u8 *qc;
e2ebc74d
JB		 1166
1167 memset(tx, 0, sizeof(*tx));
1168 tx->skb = skb;
e2ebc74d 1169 tx->local = local;
3b8d81e0 1170 tx->sdata = sdata;
252b86c4 1171 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1172
cd8ffc80
JB		 1173 /*
1174 * If this flag is set to true anywhere, and we get here,
1175 * we are doing the needed processing, so remove the flag
1176 * now.
1177 */
1178 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1179
58d4185e
JB		 1180 hdr = (struct ieee80211_hdr *) skb->data;
1181
7c10770f
JB		 1182 if (likely(sta)) {
1183 if (!IS_ERR(sta))
1184 tx->sta = sta;
1185 } else {
1186 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1187 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1188 if (!tx->sta && sdata->wdev.use_4addr)
1189 return TX_DROP;
1190 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1191 IEEE80211_TX_CTL_INJECTED) ||
1192 tx->sdata->control_port_protocol == tx->skb->protocol) {
1193 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1194 }
1195 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1196 tx->sta = sta_info_get(sdata, hdr->addr1);
3f0e0b22 1197 }
58d4185e 1198
cd8ffc80 1199 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1200 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1201 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1202 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1203 struct tid_ampdu_tx *tid_tx;
1204
8b30b1fe
S		 1205 qc = ieee80211_get_qos_ctl(hdr);
1206 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1207
a622ab72
JB		 1208 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1209 if (tid_tx) {
1210 bool queued;
cd8ffc80 1211
a622ab72
JB		 1212 queued = ieee80211_tx_prep_agg(tx, skb, info,
1213 tid_tx, tid);
1214
1215 if (unlikely(queued))
1216 return TX_QUEUED;
1217 }
8b30b1fe
S		 1218 }
1219
badffb72 1220 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1221 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1222 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1223 } else
5cf121c3 1224 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1225
a26eb27a
JB		 1226 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1227 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1228 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1229 info->flags & IEEE80211_TX_CTL_AMPDU)
1230 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1231 }
1232
e2ebc74d 1233 if (!tx->sta)
e039fa4a 1234 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1235 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1236 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1237 ieee80211_check_fast_xmit(tx->sta);
1238 }
58d4185e 1239
e039fa4a 1240 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1241
9ae54c84 1242 return TX_CONTINUE;
e2ebc74d
JB		 1243}
1244
80a83cfc
MK		 1245static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1246 struct ieee80211_vif *vif,
1247 struct ieee80211_sta *pubsta,
1248 struct sk_buff *skb)
ba8c3d6f
FF		 1249{
1250 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ba8c3d6f 1251 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ba8c3d6f 1252 struct ieee80211_txq *txq = NULL;
ba8c3d6f 1253
c3732a7b
FF		 1254 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1255 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
80a83cfc 1256 return NULL;
ba8c3d6f
FF		 1257
1258 if (!ieee80211_is_data(hdr->frame_control))
80a83cfc 1259 return NULL;
ba8c3d6f
FF		 1260
1261 if (pubsta) {
1262 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1263
1264 txq = pubsta->txq[tid];
1265 } else if (vif) {
1266 txq = vif->txq;
1267 }
1268
1269 if (!txq)
80a83cfc 1270 return NULL;
ba8c3d6f 1271
80a83cfc
MK		 1272 return to_txq_info(txq);
1273}
ba8c3d6f 1274
5caa328e
MK		 1275static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1276{
1277 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1278}
1279
1280static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
1281{
1282 IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
1283}
1284
1285static u32 codel_skb_len_func(const struct sk_buff *skb)
1286{
1287 return skb->len;
1288}
1289
1290static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1291{
1292 const struct ieee80211_tx_info *info;
1293
1294 info = (const struct ieee80211_tx_info *)skb->cb;
1295 return info->control.enqueue_time;
1296}
1297
1298static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1299 void *ctx)
1300{
1301 struct ieee80211_local *local;
1302 struct txq_info *txqi;
1303 struct fq *fq;
1304 struct fq_flow *flow;
1305
1306 txqi = ctx;
1307 local = vif_to_sdata(txqi->txq.vif)->local;
1308 fq = &local->fq;
1309
1310 if (cvars == &txqi->def_cvars)
1311 flow = &txqi->def_flow;
1312 else
1313 flow = &fq->flows[cvars - local->cvars];
1314
1315 return fq_flow_dequeue(fq, flow);
1316}
1317
1318static void codel_drop_func(struct sk_buff *skb,
1319 void *ctx)
1320{
1321 struct ieee80211_local *local;
1322 struct ieee80211_hw *hw;
1323 struct txq_info *txqi;
1324
1325 txqi = ctx;
1326 local = vif_to_sdata(txqi->txq.vif)->local;
1327 hw = &local->hw;
1328
1329 ieee80211_free_txskb(hw, skb);
1330}
1331
fa962b92
MK		 1332static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1333 struct fq_tin *tin,
1334 struct fq_flow *flow)
1335{
5caa328e
MK		 1336 struct ieee80211_local *local;
1337 struct txq_info *txqi;
1338 struct codel_vars *cvars;
1339 struct codel_params *cparams;
1340 struct codel_stats *cstats;
1341
1342 local = container_of(fq, struct ieee80211_local, fq);
1343 txqi = container_of(tin, struct txq_info, tin);
1344 cparams = &local->cparams;
8d51dbb8 1345 cstats = &txqi->cstats;
5caa328e
MK		 1346
1347 if (flow == &txqi->def_flow)
1348 cvars = &txqi->def_cvars;
1349 else
1350 cvars = &local->cvars[flow - fq->flows];
1351
1352 return codel_dequeue(txqi,
1353 &flow->backlog,
1354 cparams,
1355 cvars,
1356 cstats,
1357 codel_skb_len_func,
1358 codel_skb_time_func,
1359 codel_drop_func,
1360 codel_dequeue_func);
fa962b92
MK		 1361}
1362
1363static void fq_skb_free_func(struct fq *fq,
1364 struct fq_tin *tin,
1365 struct fq_flow *flow,
1366 struct sk_buff *skb)
1367{
1368 struct ieee80211_local *local;
1369
1370 local = container_of(fq, struct ieee80211_local, fq);
1371 ieee80211_free_txskb(&local->hw, skb);
1372}
1373
1374static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1375 struct fq_tin *tin,
1376 int idx,
1377 struct sk_buff *skb)
1378{
1379 struct txq_info *txqi;
1380
1381 txqi = container_of(tin, struct txq_info, tin);
1382 return &txqi->def_flow;
1383}
1384
80a83cfc
MK		 1385static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1386 struct txq_info *txqi,
1387 struct sk_buff *skb)
1388{
fa962b92
MK		 1389 struct fq *fq = &local->fq;
1390 struct fq_tin *tin = &txqi->tin;
f2ac7e30 1391
5caa328e 1392 ieee80211_set_skb_enqueue_time(skb);
fa962b92
MK		 1393 fq_tin_enqueue(fq, tin, skb,
1394 fq_skb_free_func,
1395 fq_flow_get_default_func);
1396}
ba8c3d6f 1397
fa962b92
MK		 1398void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1399 struct sta_info *sta,
1400 struct txq_info *txqi, int tid)
1401{
1402 fq_tin_init(&txqi->tin);
1403 fq_flow_init(&txqi->def_flow);
5caa328e 1404 codel_vars_init(&txqi->def_cvars);
8d51dbb8 1405 codel_stats_init(&txqi->cstats);
bb42f2d1 1406 __skb_queue_head_init(&txqi->frags);
fa962b92
MK		 1407
1408 txqi->txq.vif = &sdata->vif;
1409
1410 if (sta) {
1411 txqi->txq.sta = &sta->sta;
1412 sta->sta.txq[tid] = &txqi->txq;
1413 txqi->txq.tid = tid;
1414 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
1415 } else {
1416 sdata->vif.txq = &txqi->txq;
1417 txqi->txq.tid = 0;
1418 txqi->txq.ac = IEEE80211_AC_BE;
80a83cfc 1419 }
fa962b92 1420}
ba8c3d6f 1421
fa962b92
MK		 1422void ieee80211_txq_purge(struct ieee80211_local *local,
1423 struct txq_info *txqi)
1424{
1425 struct fq *fq = &local->fq;
1426 struct fq_tin *tin = &txqi->tin;
1427
1428 fq_tin_reset(fq, tin, fq_skb_free_func);
bb42f2d1 1429 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
fa962b92
MK		 1430}
1431
1432int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1433{
1434 struct fq *fq = &local->fq;
1435 int ret;
5caa328e 1436 int i;
3ff23cd5
THJ		 1437 bool supp_vht = false;
1438 enum nl80211_band band;
fa962b92
MK		 1439
1440 if (!local->ops->wake_tx_queue)
1441 return 0;
1442
1443 ret = fq_init(fq, 4096);
1444 if (ret)
1445 return ret;
1446
3ff23cd5
THJ		 1447 /*
1448 * If the hardware doesn't support VHT, it is safe to limit the maximum
1449 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1450 */
1451 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1452 struct ieee80211_supported_band *sband;
1453
1454 sband = local->hw.wiphy->bands[band];
1455 if (!sband)
1456 continue;
1457
1458 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1459 }
1460
1461 if (!supp_vht)
1462 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1463
5caa328e 1464 codel_params_init(&local->cparams);
5caa328e
MK		 1465 local->cparams.interval = MS2TIME(100);
1466 local->cparams.target = MS2TIME(20);
1467 local->cparams.ecn = true;
1468
1469 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1470 GFP_KERNEL);
1471 if (!local->cvars) {
59a7c828 1472 spin_lock_bh(&fq->lock);
5caa328e 1473 fq_reset(fq, fq_skb_free_func);
59a7c828 1474 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1475 return -ENOMEM;
1476 }
1477
1478 for (i = 0; i < fq->flows_cnt; i++)
1479 codel_vars_init(&local->cvars[i]);
1480
fa962b92
MK		 1481 return 0;
1482}
1483
1484void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1485{
1486 struct fq *fq = &local->fq;
1487
1488 if (!local->ops->wake_tx_queue)
1489 return;
1490
5caa328e
MK		 1491 kfree(local->cvars);
1492 local->cvars = NULL;
1493
59a7c828 1494 spin_lock_bh(&fq->lock);
fa962b92 1495 fq_reset(fq, fq_skb_free_func);
59a7c828 1496 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1497}
1498
bb42f2d1
THJ		 1499static bool ieee80211_queue_skb(struct ieee80211_local *local,
1500 struct ieee80211_sub_if_data *sdata,
1501 struct sta_info *sta,
1502 struct sk_buff *skb)
1503{
1504 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1505 struct fq *fq = &local->fq;
1506 struct ieee80211_vif *vif;
1507 struct txq_info *txqi;
1508 struct ieee80211_sta *pubsta;
1509
1510 if (!local->ops->wake_tx_queue ||
1511 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1512 return false;
1513
1514 if (sta && sta->uploaded)
1515 pubsta = &sta->sta;
1516 else
1517 pubsta = NULL;
1518
1519 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1520 sdata = container_of(sdata->bss,
1521 struct ieee80211_sub_if_data, u.ap);
1522
1523 vif = &sdata->vif;
1524 txqi = ieee80211_get_txq(local, vif, pubsta, skb);
1525
1526 if (!txqi)
1527 return false;
1528
1529 info->control.vif = vif;
1530
1531 spin_lock_bh(&fq->lock);
1532 ieee80211_txq_enqueue(local, txqi, skb);
1533 spin_unlock_bh(&fq->lock);
1534
1535 drv_wake_tx_queue(local, txqi);
1536
1537 return true;
1538}
1539
11127e91
JB		 1540static bool ieee80211_tx_frags(struct ieee80211_local *local,
1541 struct ieee80211_vif *vif,
1542 struct ieee80211_sta *sta,
1543 struct sk_buff_head *skbs,
1544 bool txpending)
e2ebc74d 1545{
80a83cfc 1546 struct ieee80211_tx_control control = {};
252b86c4 1547 struct sk_buff *skb, *tmp;
3b8d81e0 1548 unsigned long flags;
e2ebc74d 1549
252b86c4 1550 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1551 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1552 int q = info->hw_queue;
1553
1554#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1555 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1556 __skb_unlink(skb, skbs);
c3e7724b 1557 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1558 continue;
1559 }
1560#endif
3b8d81e0
JB		 1561
1562 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1563 if (local->queue_stop_reasons[q] ||
7bb45683 1564 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1565 if (unlikely(info->flags &
a7679ed5
SF		 1566 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1567 if (local->queue_stop_reasons[q] &
1568 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1569 /*
1570 * Drop off-channel frames if queues
1571 * are stopped for any reason other
1572 * than off-channel operation. Never
1573 * queue them.
1574 */
1575 spin_unlock_irqrestore(
1576 &local->queue_stop_reason_lock,
1577 flags);
1578 ieee80211_purge_tx_queue(&local->hw,
1579 skbs);
1580 return true;
1581 }
1582 } else {
1583
6c17b77b 1584 /*
a7679ed5
SF		 1585 * Since queue is stopped, queue up frames for
1586 * later transmission from the tx-pending
1587 * tasklet when the queue is woken again.
6c17b77b 1588 */
a7679ed5
SF		 1589 if (txpending)
1590 skb_queue_splice_init(skbs,
1591 &local->pending[q]);
1592 else
1593 skb_queue_splice_tail_init(skbs,
1594 &local->pending[q]);
1595
1596 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1597 flags);
1598 return false;
6c17b77b 1599 }
7bb45683 1600 }
3b8d81e0 1601 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1602
11127e91 1603 info->control.vif = vif;
80a83cfc 1604 control.sta = sta;
f0e72851 1605
11127e91 1606 __skb_unlink(skb, skbs);
80a83cfc 1607 drv_tx(local, &control, skb);
11127e91 1608 }
5061b0c2 1609
11127e91
JB		 1610 return true;
1611}
1612
1613/*
1614 * Returns false if the frame couldn't be transmitted but was queued instead.
1615 */
1616static bool __ieee80211_tx(struct ieee80211_local *local,
1617 struct sk_buff_head *skbs, int led_len,
1618 struct sta_info *sta, bool txpending)
1619{
1620 struct ieee80211_tx_info *info;
1621 struct ieee80211_sub_if_data *sdata;
1622 struct ieee80211_vif *vif;
1623 struct ieee80211_sta *pubsta;
1624 struct sk_buff *skb;
1625 bool result = true;
1626 __le16 fc;
5061b0c2 1627
11127e91
JB		 1628 if (WARN_ON(skb_queue_empty(skbs)))
1629 return true;
ec25acc4 1630
11127e91
JB		 1631 skb = skb_peek(skbs);
1632 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1633 info = IEEE80211_SKB_CB(skb);
1634 sdata = vif_to_sdata(info->control.vif);
1635 if (sta && !sta->uploaded)
1636 sta = NULL;
1637
1638 if (sta)
1639 pubsta = &sta->sta;
1640 else
1641 pubsta = NULL;
1642
1643 switch (sdata->vif.type) {
1644 case NL80211_IFTYPE_MONITOR:
d8212184 1645 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
c82b5a74
JB		 1646 vif = &sdata->vif;
1647 break;
1648 }
4b6f1dd6 1649 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1650 if (sdata) {
4b6f1dd6 1651 vif = &sdata->vif;
3a25a8c8
JB		 1652 info->hw_queue =
1653 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1654 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1655 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1656 return true;
1657 } else
4b6f1dd6 1658 vif = NULL;
11127e91
JB		 1659 break;
1660 case NL80211_IFTYPE_AP_VLAN:
1661 sdata = container_of(sdata->bss,
1662 struct ieee80211_sub_if_data, u.ap);
1663 /* fall through */
1664 default:
1665 vif = &sdata->vif;
1666 break;
e2ebc74d 1667 }
2de8e0d9 1668
cb831b53
JB		 1669 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1670 txpending);
11127e91 1671
74e4dbfd 1672 ieee80211_tpt_led_trig_tx(local, fc, led_len);
74e4dbfd 1673
4db4e0a1 1674 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1675
11127e91 1676 return result;
e2ebc74d
JB		 1677}
1678
97b045d6
JB		 1679/*
1680 * Invoke TX handlers, return 0 on success and non-zero if the
1681 * frame was dropped or queued.
bb42f2d1
THJ		 1682 *
1683 * The handlers are split into an early and late part. The latter is everything
1684 * that can be sensitive to reordering, and will be deferred to after packets
1685 * are dequeued from the intermediate queues (when they are enabled).
97b045d6 1686 */
bb42f2d1 1687static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
97b045d6 1688{
97b045d6 1689 ieee80211_tx_result res = TX_DROP;
97b045d6 1690
9aa4aee3
JB		 1691#define CALL_TXH(txh) \
1692 do { \
1693 res = txh(tx); \
1694 if (res != TX_CONTINUE) \
1695 goto txh_done; \
1696 } while (0)
1697
5c1b98a5 1698 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1699 CALL_TXH(ieee80211_tx_h_check_assoc);
1700 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1701 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1702 CALL_TXH(ieee80211_tx_h_select_key);
30686bf7 1703 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
af65cd96 1704 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1705
bb42f2d1
THJ		 1706 txh_done:
1707 if (unlikely(res == TX_DROP)) {
1708 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1709 if (tx->skb)
1710 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1711 else
1712 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1713 return -1;
1714 } else if (unlikely(res == TX_QUEUED)) {
1715 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1716 return -1;
1717 }
1718
1719 return 0;
1720}
1721
1722/*
1723 * Late handlers can be called while the sta lock is held. Handlers that can
1724 * cause packets to be generated will cause deadlock!
1725 */
1726static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1727{
1728 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1729 ieee80211_tx_result res = TX_CONTINUE;
1730
aa5b5492
JB		 1731 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1732 __skb_queue_tail(&tx->skbs, tx->skb);
1733 tx->skb = NULL;
c6fcf6bc 1734 goto txh_done;
aa5b5492 1735 }
c6fcf6bc
JB		 1736
1737 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1738 CALL_TXH(ieee80211_tx_h_sequence);
1739 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1740 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1741 CALL_TXH(ieee80211_tx_h_stats);
1742 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1743 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1744 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1745#undef CALL_TXH
97b045d6 1746
d9e8a70f 1747 txh_done:
97b045d6 1748 if (unlikely(res == TX_DROP)) {
5479d0e7 1749 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1750 if (tx->skb)
c3e7724b 1751 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1752 else
1f98ab7f 1753 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1754 return -1;
1755 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1756 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1757 return -1;
1758 }
1759
1760 return 0;
1761}
1762
bb42f2d1
THJ		 1763static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1764{
1765 int r = invoke_tx_handlers_early(tx);
1766
1767 if (r)
1768 return r;
1769 return invoke_tx_handlers_late(tx);
1770}
1771
06be6b14
FF		 1772bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1773 struct ieee80211_vif *vif, struct sk_buff *skb,
1774 int band, struct ieee80211_sta **sta)
1775{
1776 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1777 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1778 struct ieee80211_tx_data tx;
88724a81 1779 struct sk_buff *skb2;
06be6b14 1780
7c10770f 1781 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1782 return false;
1783
1784 info->band = band;
1785 info->control.vif = vif;
1786 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1787
1788 if (invoke_tx_handlers(&tx))
1789 return false;
1790
1791 if (sta) {
1792 if (tx.sta)
1793 *sta = &tx.sta->sta;
1794 else
1795 *sta = NULL;
1796 }
1797
88724a81
JB		 1798 /* this function isn't suitable for fragmented data frames */
1799 skb2 = __skb_dequeue(&tx.skbs);
1800 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1801 ieee80211_free_txskb(hw, skb2);
1802 ieee80211_purge_tx_queue(hw, &tx.skbs);
1803 return false;
1804 }
1805
06be6b14
FF		 1806 return true;
1807}
1808EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1809
7bb45683
JB		 1810/*
1811 * Returns false if the frame couldn't be transmitted but was queued instead.
1812 */
1813static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f
JB		 1814 struct sta_info *sta, struct sk_buff *skb,
1815 bool txpending)
e2ebc74d 1816{
3b8d81e0 1817 struct ieee80211_local *local = sdata->local;
5cf121c3 1818 struct ieee80211_tx_data tx;
97b045d6 1819 ieee80211_tx_result res_prepare;
e039fa4a 1820 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1821 bool result = true;
74e4dbfd 1822 int led_len;
e2ebc74d 1823
e2ebc74d
JB		 1824 if (unlikely(skb->len < 10)) {
1825 dev_kfree_skb(skb);
7bb45683 1826 return true;
e2ebc74d
JB		 1827 }
1828
58d4185e 1829 /* initialises tx */
74e4dbfd 1830 led_len = skb->len;
7c10770f 1831 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1832
cd8ffc80 1833 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1834 ieee80211_free_txskb(&local->hw, skb);
55de908a 1835 return true;
cd8ffc80 1836 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1837 return true;
e2ebc74d
JB		 1838 }
1839
3a25a8c8
JB		 1840 /* set up hw_queue value early */
1841 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1842 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1843 info->hw_queue =
1844 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1845
bb42f2d1
THJ		 1846 if (invoke_tx_handlers_early(&tx))
1847 return false;
1848
1849 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1850 return true;
1851
1852 if (!invoke_tx_handlers_late(&tx))
74e4dbfd
JB		 1853 result = __ieee80211_tx(local, &tx.skbs, led_len,
1854 tx.sta, txpending);
55de908a 1855
7bb45683 1856 return result;
e2ebc74d
JB		 1857}
1858
1859/* device xmit handlers */
1860
3bff1865 1861static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1862 struct sk_buff *skb,
1863 int head_need, bool may_encrypt)
1864{
3bff1865 1865 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1866 int tail_need = 0;
1867
3bff1865 1868 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1869 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1870 tail_need -= skb_tailroom(skb);
1871 tail_need = max_t(int, tail_need, 0);
1872 }
1873
c70f59a2 1874 if (skb_cloned(skb) &&
30686bf7 1875 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
c70f59a2 1876 !skb_clone_writable(skb, ETH_HLEN) ||
17c18bf8 1877 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
23c0752a 1878 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1879 else if (head_need || tail_need)
23c0752a 1880 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1881 else
1882 return 0;
23c0752a
JB		 1883
1884 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1885 wiphy_debug(local->hw.wiphy,
1886 "failed to reallocate TX buffer\n");
23c0752a
JB		 1887 return -ENOMEM;
1888 }
1889
23c0752a
JB		 1890 return 0;
1891}
1892
7c10770f
JB		 1893void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1894 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1895{
3b8d81e0 1896 struct ieee80211_local *local = sdata->local;
e039fa4a 1897 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e32f85f7 1898 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 1899 int headroom;
23c0752a 1900 bool may_encrypt;
e2ebc74d 1901
3b8d81e0 1902 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1903
3b8d81e0 1904 headroom = local->tx_headroom;
23c0752a 1905 if (may_encrypt)
2475b1cc 1906 headroom += sdata->encrypt_headroom;
23c0752a
JB		 1907 headroom -= skb_headroom(skb);
1908 headroom = max_t(int, 0, headroom);
1909
3bff1865 1910 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1911 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1912 return;
e2ebc74d
JB		 1913 }
1914
740c1aa3 1915 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1916 info->control.vif = &sdata->vif;
e2ebc74d 1917
3f52b7e3
MP		 1918 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1919 if (ieee80211_is_data(hdr->frame_control) &&
1920 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1921 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1922 return; /* skb queued: don't free */
1923 } else {
1924 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1925 }
98aed9fd 1926 }
cca89496 1927
2154c81c 1928 ieee80211_set_qos_hdr(sdata, skb);
7c10770f 1929 ieee80211_tx(sdata, sta, skb, false);
e2ebc74d
JB		 1930}
1931
dfdfc2be
SE		 1932static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1933 struct sk_buff *skb)
73b9f03a
JB		 1934{
1935 struct ieee80211_radiotap_iterator iterator;
1936 struct ieee80211_radiotap_header *rthdr =
1937 (struct ieee80211_radiotap_header *) skb->data;
1938 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
dfdfc2be
SE		 1939 struct ieee80211_supported_band *sband =
1940 local->hw.wiphy->bands[info->band];
73b9f03a
JB		 1941 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1942 NULL);
1943 u16 txflags;
dfdfc2be
SE		 1944 u16 rate = 0;
1945 bool rate_found = false;
1946 u8 rate_retries = 0;
1947 u16 rate_flags = 0;
f66b60f6 1948 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 1949 u16 vht_known;
1950 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 1951 int i;
73b9f03a
JB		 1952
1953 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1954 IEEE80211_TX_CTL_DONTFRAG;
1955
1956 /*
1957 * for every radiotap entry that is present
1958 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1959 * entries present, or -EINVAL on error)
1960 */
1961
1962 while (!ret) {
1963 ret = ieee80211_radiotap_iterator_next(&iterator);
1964
1965 if (ret)
1966 continue;
1967
1968 /* see if this argument is something we can use */
1969 switch (iterator.this_arg_index) {
1970 /*
1971 * You must take care when dereferencing iterator.this_arg
1972 * for multibyte types... the pointer is not aligned. Use
1973 * get_unaligned((type *)iterator.this_arg) to dereference
1974 * iterator.this_arg for type "type" safely on all arches.
1975 */
1976 case IEEE80211_RADIOTAP_FLAGS:
1977 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1978 /*
1979 * this indicates that the skb we have been
1980 * handed has the 32-bit FCS CRC at the end...
1981 * we should react to that by snipping it off
1982 * because it will be recomputed and added
1983 * on transmission
1984 */
1985 if (skb->len < (iterator._max_length + FCS_LEN))
1986 return false;
1987
1988 skb_trim(skb, skb->len - FCS_LEN);
1989 }
1990 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1991 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1992 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1993 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1994 break;
1995
1996 case IEEE80211_RADIOTAP_TX_FLAGS:
1997 txflags = get_unaligned_le16(iterator.this_arg);
1998 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1999 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2000 break;
2001
dfdfc2be
SE		 2002 case IEEE80211_RADIOTAP_RATE:
2003 rate = *iterator.this_arg;
2004 rate_flags = 0;
2005 rate_found = true;
2006 break;
2007
2008 case IEEE80211_RADIOTAP_DATA_RETRIES:
2009 rate_retries = *iterator.this_arg;
2010 break;
2011
2012 case IEEE80211_RADIOTAP_MCS:
2013 mcs_known = iterator.this_arg[0];
2014 mcs_flags = iterator.this_arg[1];
2015 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2016 break;
2017
2018 rate_found = true;
2019 rate = iterator.this_arg[2];
2020 rate_flags = IEEE80211_TX_RC_MCS;
2021
2022 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2023 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2024 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2025
f66b60f6 2026 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 2027 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 2028 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be
SE		 2029 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2030 break;
2031
646e76bb
LB		 2032 case IEEE80211_RADIOTAP_VHT:
2033 vht_known = get_unaligned_le16(iterator.this_arg);
2034 rate_found = true;
2035
2036 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2037 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2038 (iterator.this_arg[2] &
2039 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2040 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2041 if (vht_known &
2042 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2043 if (iterator.this_arg[3] == 1)
2044 rate_flags |=
2045 IEEE80211_TX_RC_40_MHZ_WIDTH;
2046 else if (iterator.this_arg[3] == 4)
2047 rate_flags |=
2048 IEEE80211_TX_RC_80_MHZ_WIDTH;
2049 else if (iterator.this_arg[3] == 11)
2050 rate_flags |=
2051 IEEE80211_TX_RC_160_MHZ_WIDTH;
2052 }
2053
2054 vht_mcs = iterator.this_arg[4] >> 4;
2055 vht_nss = iterator.this_arg[4] & 0xF;
2056 break;
2057
73b9f03a
JB		 2058 /*
2059 * Please update the file
2060 * Documentation/networking/mac80211-injection.txt
2061 * when parsing new fields here.
2062 */
2063
2064 default:
2065 break;
2066 }
2067 }
2068
2069 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2070 return false;
2071
dfdfc2be
SE		 2072 if (rate_found) {
2073 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2074
2075 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2076 info->control.rates[i].idx = -1;
2077 info->control.rates[i].flags = 0;
2078 info->control.rates[i].count = 0;
2079 }
2080
2081 if (rate_flags & IEEE80211_TX_RC_MCS) {
2082 info->control.rates[0].idx = rate;
646e76bb
LB		 2083 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2084 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2085 vht_nss);
dfdfc2be
SE		 2086 } else {
2087 for (i = 0; i < sband->n_bitrates; i++) {
2088 if (rate * 5 != sband->bitrates[i].bitrate)
2089 continue;
2090
2091 info->control.rates[0].idx = i;
2092 break;
2093 }
2094 }
2095
07310a63
FF		 2096 if (info->control.rates[0].idx < 0)
2097 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2098
dfdfc2be
SE		 2099 info->control.rates[0].flags = rate_flags;
2100 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2101 local->hw.max_rate_tries);
2102 }
2103
73b9f03a
JB		 2104 /*
2105 * remove the radiotap header
2106 * iterator->_max_length was sanity-checked against
2107 * skb->len by iterator init
2108 */
2109 skb_pull(skb, iterator._max_length);
2110
2111 return true;
2112}
2113
d0cf9c0d
SH		 2114netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2115 struct net_device *dev)
e2ebc74d
JB		 2116{
2117 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2118 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d
JB		 2119 struct ieee80211_radiotap_header *prthdr =
2120 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 2121 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2122 struct ieee80211_hdr *hdr;
5d9cf4a5 2123 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2124 struct cfg80211_chan_def *chandef;
9b8a74e3 2125 u16 len_rthdr;
5d9cf4a5 2126 int hdrlen;
e2ebc74d 2127
9b8a74e3
AG		 2128 /* check for not even having the fixed radiotap header part */
2129 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2130 goto fail; /* too short to be possibly valid */
2131
2132 /* is it a header version we can trust to find length from? */
2133 if (unlikely(prthdr->it_version))
2134 goto fail; /* only version 0 is supported */
2135
2136 /* then there must be a radiotap header with a length we can use */
2137 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2138
2139 /* does the skb contain enough to deliver on the alleged length? */
2140 if (unlikely(skb->len < len_rthdr))
2141 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 2142
e2ebc74d
JB		 2143 /*
2144 * fix up the pointers accounting for the radiotap
2145 * header still being in there. We are being given
2146 * a precooked IEEE80211 header so no need for
2147 * normal processing
2148 */
9b8a74e3 2149 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2150 /*
9b8a74e3
AG		 2151 * these are just fixed to the end of the rt area since we
2152 * don't have any better information and at this point, nobody cares
e2ebc74d 2153 */
9b8a74e3
AG		 2154 skb_set_network_header(skb, len_rthdr);
2155 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2156
5d9cf4a5
JB		 2157 if (skb->len < len_rthdr + 2)
2158 goto fail;
2159
2160 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2161 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2162
2163 if (skb->len < len_rthdr + hdrlen)
2164 goto fail;
2165
f75f5c6f
HS		 2166 /*
2167 * Initialize skb->protocol if the injected frame is a data frame
2168 * carrying a rfc1042 header
2169 */
5d9cf4a5
JB		 2170 if (ieee80211_is_data(hdr->frame_control) &&
2171 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2172 u8 *payload = (u8 *)hdr + hdrlen;
2173
b203ca39 2174 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2175 skb->protocol = cpu_to_be16((payload[6] << 8) |
2176 payload[7]);
f75f5c6f
HS		 2177 }
2178
3b8d81e0
JB		 2179 memset(info, 0, sizeof(*info));
2180
5d9cf4a5 2181 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 2182 IEEE80211_TX_CTL_INJECTED;
2183
5d9cf4a5
JB		 2184 rcu_read_lock();
2185
2186 /*
2187 * We process outgoing injected frames that have a local address
2188 * we handle as though they are non-injected frames.
2189 * This code here isn't entirely correct, the local MAC address
2190 * isn't always enough to find the interface to use; for proper
2191 * VLAN/WDS support we will need a different mechanism (which
2192 * likely isn't going to be monitor interfaces).
2193 */
2194 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2195
2196 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2197 if (!ieee80211_sdata_running(tmp_sdata))
2198 continue;
2199 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2200 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2201 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2202 continue;
b203ca39 2203 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2204 sdata = tmp_sdata;
2205 break;
2206 }
2207 }
7351c6bd 2208
55de908a
JB		 2209 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2210 if (!chanctx_conf) {
2211 tmp_sdata = rcu_dereference(local->monitor_sdata);
2212 if (tmp_sdata)
2213 chanctx_conf =
2214 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2215 }
55de908a 2216
b4a7ff75 2217 if (chanctx_conf)
b4932836 2218 chandef = &chanctx_conf->def;
b4a7ff75 2219 else if (!local->use_chanctx)
b4932836 2220 chandef = &local->_oper_chandef;
b4a7ff75
FF		 2221 else
2222 goto fail_rcu;
55de908a
JB		 2223
2224 /*
2225 * Frame injection is not allowed if beaconing is not allowed
2226 * or if we need radar detection. Beaconing is usually not allowed when
2227 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2228 * Passive scan is also used in world regulatory domains where
2229 * your country is not known and as such it should be treated as
2230 * NO TX unless the channel is explicitly allowed in which case
2231 * your current regulatory domain would not have the passive scan
2232 * flag.
2233 *
2234 * Since AP mode uses monitor interfaces to inject/TX management
2235 * frames we can make AP mode the exception to this rule once it
2236 * supports radar detection as its implementation can deal with
2237 * radar detection by itself. We can do that later by adding a
2238 * monitor flag interfaces used for AP support.
2239 */
b4932836
JD		 2240 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2241 sdata->vif.type))
55de908a
JB		 2242 goto fail_rcu;
2243
73c4e195 2244 info->band = chandef->chan->band;
109843b0
LB		 2245
2246 /* process and remove the injection radiotap header */
2247 if (!ieee80211_parse_tx_radiotap(local, skb))
2248 goto fail_rcu;
2249
7c10770f 2250 ieee80211_xmit(sdata, NULL, skb);
5d9cf4a5
JB		 2251 rcu_read_unlock();
2252
e2ebc74d 2253 return NETDEV_TX_OK;
9b8a74e3 2254
55de908a
JB		 2255fail_rcu:
2256 rcu_read_unlock();
9b8a74e3
AG		 2257fail:
2258 dev_kfree_skb(skb);
2259 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2260}
2261
97ffe757 2262static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2263{
97ffe757 2264 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2265
97ffe757
JB		 2266 return ethertype == ETH_P_TDLS &&
2267 skb->len > 14 &&
2268 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2269}
2270
2271static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2272 struct sk_buff *skb,
2273 struct sta_info **sta_out)
2274{
2275 struct sta_info *sta;
2276
2277 switch (sdata->vif.type) {
2278 case NL80211_IFTYPE_AP_VLAN:
2279 sta = rcu_dereference(sdata->u.vlan.sta);
2280 if (sta) {
2281 *sta_out = sta;
2282 return 0;
2283 } else if (sdata->wdev.use_4addr) {
2284 return -ENOLINK;
2285 }
2286 /* fall through */
2287 case NL80211_IFTYPE_AP:
2288 case NL80211_IFTYPE_OCB:
2289 case NL80211_IFTYPE_ADHOC:
2290 if (is_multicast_ether_addr(skb->data)) {
2291 *sta_out = ERR_PTR(-ENOENT);
2292 return 0;
2293 }
2294 sta = sta_info_get_bss(sdata, skb->data);
2295 break;
2296 case NL80211_IFTYPE_WDS:
2297 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2298 break;
2299#ifdef CONFIG_MAC80211_MESH
2300 case NL80211_IFTYPE_MESH_POINT:
2301 /* determined much later */
2302 *sta_out = NULL;
2303 return 0;
2304#endif
2305 case NL80211_IFTYPE_STATION:
2306 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2307 sta = sta_info_get(sdata, skb->data);
11d62caf
JB		 2308 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2309 if (test_sta_flag(sta,
2310 WLAN_STA_TDLS_PEER_AUTH)) {
97ffe757
JB		 2311 *sta_out = sta;
2312 return 0;
2313 }
2314
2315 /*
2316 * TDLS link during setup - throw out frames to
2317 * peer. Allow TDLS-setup frames to unauthorized
2318 * peers for the special case of a link teardown
2319 * after a TDLS sta is removed due to being
2320 * unreachable.
2321 */
11d62caf 2322 if (!ieee80211_is_tdls_setup(skb))
97ffe757
JB		 2323 return -EINVAL;
2324 }
2325
2326 }
2327
2328 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2329 if (!sta)
2330 return -ENOLINK;
2331 break;
2332 default:
2333 return -EINVAL;
2334 }
2335
2336 *sta_out = sta ?: ERR_PTR(-ENOENT);
2337 return 0;
ad38bfc9
MG		 2338}
2339
e2ebc74d 2340/**
4c9451ed
JB		 2341 * ieee80211_build_hdr - build 802.11 header in the given frame
2342 * @sdata: virtual interface to build the header for
2343 * @skb: the skb to build the header in
24d342c5 2344 * @info_flags: skb flags to set
e2ebc74d 2345 *
4c9451ed
JB		 2346 * This function takes the skb with 802.3 header and reformats the header to
2347 * the appropriate IEEE 802.11 header based on which interface the packet is
2348 * being transmitted on.
2349 *
2350 * Note that this function also takes care of the TX status request and
2351 * potential unsharing of the SKB - this needs to be interleaved with the
2352 * header building.
e2ebc74d 2353 *
4c9451ed
JB		 2354 * The function requires the read-side RCU lock held
2355 *
2356 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2357 */
4c9451ed 2358static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2359 struct sk_buff *skb, u32 info_flags,
97ffe757 2360 struct sta_info *sta)
e2ebc74d 2361{
133b8226 2362 struct ieee80211_local *local = sdata->local;
489ee919 2363 struct ieee80211_tx_info *info;
dcf33963 2364 int head_need;
065e9605
HH		 2365 u16 ethertype, hdrlen, meshhdrlen = 0;
2366 __le16 fc;
e2ebc74d 2367 struct ieee80211_hdr hdr;
ff67bb86 2368 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2369 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2370 const u8 *encaps_data;
2371 int encaps_len, skip_header_bytes;
97ffe757
JB		 2372 bool wme_sta = false, authorized = false;
2373 bool tdls_peer;
a729cff8 2374 bool multicast;
a729cff8 2375 u16 info_id = 0;
55de908a
JB		 2376 struct ieee80211_chanctx_conf *chanctx_conf;
2377 struct ieee80211_sub_if_data *ap_sdata;
57fbcce3 2378 enum nl80211_band band;
4c9451ed 2379 int ret;
e2ebc74d 2380
97ffe757
JB		 2381 if (IS_ERR(sta))
2382 sta = NULL;
2383
e2ebc74d
JB		 2384 /* convert Ethernet header to proper 802.11 header (based on
2385 * operation mode) */
2386 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2387 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2388
51fb61e7 2389 switch (sdata->vif.type) {
05c914fe 2390 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2391 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2392 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2393 /* RA TA DA SA */
2394 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2395 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2396 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2397 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2398 hdrlen = 30;
c2c98fde 2399 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2400 wme_sta = sta->sta.wme;
f14543ee 2401 }
55de908a
JB		 2402 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2403 u.ap);
2404 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
4c9451ed
JB		 2405 if (!chanctx_conf) {
2406 ret = -ENOTCONN;
2407 goto free;
2408 }
4bf88530 2409 band = chanctx_conf->def.chan->band;
97ffe757 2410 if (sdata->wdev.use_4addr)
f14543ee
FF		 2411 break;
2412 /* fall through */
2413 case NL80211_IFTYPE_AP:
fe80123d
AB		 2414 if (sdata->vif.type == NL80211_IFTYPE_AP)
2415 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2416 if (!chanctx_conf) {
2417 ret = -ENOTCONN;
2418 goto free;
2419 }
065e9605 2420 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2421 /* DA BSSID SA */
2422 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 2423 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2424 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2425 hdrlen = 24;
4bf88530 2426 band = chanctx_conf->def.chan->band;
cf966838 2427 break;
05c914fe 2428 case NL80211_IFTYPE_WDS:
065e9605 2429 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 2430 /* RA TA DA SA */
2431 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 2432 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2433 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2434 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2435 hdrlen = 30;
55de908a
JB		 2436 /*
2437 * This is the exception! WDS style interfaces are prohibited
2438 * when channel contexts are in used so this must be valid
2439 */
675a0b04 2440 band = local->hw.conf.chandef.chan->band;
cf966838 2441 break;
33b64eb2 2442#ifdef CONFIG_MAC80211_MESH
05c914fe 2443 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2444 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2445 struct sta_info *next_hop;
2446 bool mpp_lookup = true;
2447
bf7cd94d 2448 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2449 if (mpath) {
2450 mpp_lookup = false;
2451 next_hop = rcu_dereference(mpath->next_hop);
2452 if (!next_hop ||
2453 !(mpath->flags & (MESH_PATH_ACTIVE |
2454 MESH_PATH_RESOLVING)))
2455 mpp_lookup = true;
2456 }
2457
ab1c7906 2458 if (mpp_lookup) {
bf7cd94d 2459 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2460 if (mppath)
2461 mppath->exp_time = jiffies;
2462 }
163df6cf
CYY		 2463
2464 if (mppath && mpath)
2bdaf386 2465 mesh_path_del(sdata, mpath->dst);
b8bacc18 2466 }
79617dee 2467
f76b57b4 2468 /*
9d52501b
JF		 2469 * Use address extension if it is a packet from
2470 * another interface or if we know the destination
2471 * is being proxied by a portal (i.e. portal address
2472 * differs from proxied address)
f76b57b4 2473 */
b203ca39
JP		 2474 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2475 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2476 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2477 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2478 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2479 NULL, NULL);
79617dee 2480 } else {
27f01124
TP		 2481 /* DS -> MBSS (802.11-2012 13.11.3.3).
2482 * For unicast with unknown forwarding information,
2483 * destination might be in the MBSS or if that fails
2484 * forwarded to another mesh gate. In either case
2485 * resolution will be handled in ieee80211_xmit(), so
2486 * leave the original DA. This also works for mcast */
2487 const u8 *mesh_da = skb->data;
2488
2489 if (mppath)
2490 mesh_da = mppath->mpp;
2491 else if (mpath)
2492 mesh_da = mpath->dst;
79617dee 2493
3c5772a5 2494 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2495 mesh_da, sdata->vif.addr);
27f01124
TP		 2496 if (is_multicast_ether_addr(mesh_da))
2497 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2498 meshhdrlen = ieee80211_new_mesh_header(
2499 sdata, &mesh_hdr,
2500 skb->data + ETH_ALEN, NULL);
3c5772a5 2501 else
27f01124 2502 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2503 meshhdrlen = ieee80211_new_mesh_header(
2504 sdata, &mesh_hdr, skb->data,
2505 skb->data + ETH_ALEN);
79617dee 2506
79617dee 2507 }
55de908a 2508 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2509 if (!chanctx_conf) {
2510 ret = -ENOTCONN;
2511 goto free;
2512 }
4bf88530 2513 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 2514 break;
2515#endif
05c914fe 2516 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2517 /* we already did checks when looking up the RA STA */
2518 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2519
97ffe757 2520 if (tdls_peer) {
941c93cd
AN		 2521 /* DA SA BSSID */
2522 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2523 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2524 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2525 hdrlen = 24;
2526 } else if (sdata->u.mgd.use_4addr &&
2527 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2528 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2529 IEEE80211_FCTL_TODS);
f14543ee 2530 /* RA TA DA SA */
941c93cd 2531 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 2532 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2533 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2534 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2535 hdrlen = 30;
2536 } else {
2537 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2538 /* BSSID SA DA */
941c93cd 2539 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 2540 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2541 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2542 hdrlen = 24;
2543 }
55de908a 2544 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2545 if (!chanctx_conf) {
2546 ret = -ENOTCONN;
2547 goto free;
2548 }
4bf88530 2549 band = chanctx_conf->def.chan->band;
cf966838 2550 break;
239281f8
RL		 2551 case NL80211_IFTYPE_OCB:
2552 /* DA SA BSSID */
2553 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2554 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2555 eth_broadcast_addr(hdr.addr3);
2556 hdrlen = 24;
2557 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2558 if (!chanctx_conf) {
2559 ret = -ENOTCONN;
2560 goto free;
2561 }
239281f8
RL		 2562 band = chanctx_conf->def.chan->band;
2563 break;
05c914fe 2564 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2565 /* DA SA BSSID */
2566 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2567 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2568 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2569 hdrlen = 24;
55de908a 2570 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2571 if (!chanctx_conf) {
2572 ret = -ENOTCONN;
2573 goto free;
2574 }
4bf88530 2575 band = chanctx_conf->def.chan->band;
cf966838
JB		 2576 break;
2577 default:
4c9451ed
JB		 2578 ret = -EINVAL;
2579 goto free;
e2ebc74d
JB		 2580 }
2581
a729cff8 2582 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2583
97ffe757
JB		 2584 /* sta is always NULL for mesh */
2585 if (sta) {
2586 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2587 wme_sta = sta->sta.wme;
2588 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2589 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2590 wme_sta = true;
97ffe757 2591 }
4777be41 2592
527871d7
JB		 2593 /* receiver does QoS (which also means we do) use it */
2594 if (wme_sta) {
065e9605 2595 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2596 hdrlen += 2;
2597 }
2598
2599 /*
238814fd
JB		 2600 * Drop unicast frames to unauthorised stations unless they are
2601 * EAPOL frames from the local station.
ce3edf6d 2602 */
55182e4a 2603 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2604 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2605 !multicast && !authorized &&
55182e4a 2606 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2607 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2608#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2609 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2610 sdata->name, hdr.addr1);
ce3edf6d
JB		 2611#endif
2612
2613 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2614
4c9451ed
JB		 2615 ret = -EPERM;
2616 goto free;
ce3edf6d
JB		 2617 }
2618
a729cff8
JB		 2619 if (unlikely(!multicast && skb->sk &&
2620 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
bf7fa551 2621 struct sk_buff *ack_skb = skb_clone_sk(skb);
a729cff8 2622
bf7fa551 2623 if (ack_skb) {
a729cff8 2624 unsigned long flags;
9475af6e 2625 int id;
a729cff8
JB		 2626
2627 spin_lock_irqsave(&local->ack_status_lock, flags);
bf7fa551 2628 id = idr_alloc(&local->ack_status_frames, ack_skb,
9475af6e 2629 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2630 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2631
9475af6e 2632 if (id >= 0) {
a729cff8
JB		 2633 info_id = id;
2634 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
a729cff8 2635 } else {
bf7fa551 2636 kfree_skb(ack_skb);
a729cff8 2637 }
a729cff8
JB		 2638 }
2639 }
2640
7e244707
HS		 2641 /*
2642 * If the skb is shared we need to obtain our own copy.
2643 */
2644 if (skb_shared(skb)) {
a729cff8
JB		 2645 struct sk_buff *tmp_skb = skb;
2646
2647 /* can't happen -- skb is a clone if info_id != 0 */
2648 WARN_ON(info_id);
2649
f8a0a781 2650 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2651 kfree_skb(tmp_skb);
2652
4c9451ed
JB		 2653 if (!skb) {
2654 ret = -ENOMEM;
2655 goto free;
2656 }
7e244707
HS		 2657 }
2658
065e9605 2659 hdr.frame_control = fc;
e2ebc74d
JB		 2660 hdr.duration_id = 0;
2661 hdr.seq_ctrl = 0;
2662
2663 skip_header_bytes = ETH_HLEN;
2664 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2665 encaps_data = bridge_tunnel_header;
2666 encaps_len = sizeof(bridge_tunnel_header);
2667 skip_header_bytes -= 2;
e5c5d22e 2668 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2669 encaps_data = rfc1042_header;
2670 encaps_len = sizeof(rfc1042_header);
2671 skip_header_bytes -= 2;
2672 } else {
2673 encaps_data = NULL;
2674 encaps_len = 0;
2675 }
2676
2677 skb_pull(skb, skip_header_bytes);
23c0752a 2678 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2679
23c0752a
JB		 2680 /*
2681 * So we need to modify the skb header and hence need a copy of
2682 * that. The head_need variable above doesn't, so far, include
2683 * the needed header space that we don't need right away. If we
2684 * can, then we don't reallocate right now but only after the
2685 * frame arrives at the master device (if it does...)
2686 *
2687 * If we cannot, however, then we will reallocate to include all
2688 * the ever needed space. Also, if we need to reallocate it anyway,
2689 * make it big enough for everything we may ever need.
2690 */
e2ebc74d 2691
3a5be7d4 2692 if (head_need > 0 || skb_cloned(skb)) {
2475b1cc 2693 head_need += sdata->encrypt_headroom;
23c0752a
JB		 2694 head_need += local->tx_headroom;
2695 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2696 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2697 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2698 skb = NULL;
4c9451ed 2699 return ERR_PTR(-ENOMEM);
c3e7724b 2700 }
e2ebc74d
JB		 2701 }
2702
eae4430e 2703 if (encaps_data)
e2ebc74d 2704 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2705
e4ab7eb0 2706#ifdef CONFIG_MAC80211_MESH
eae4430e 2707 if (meshhdrlen > 0)
33b64eb2 2708 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2709#endif
33b64eb2 2710
065e9605 2711 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2712 __le16 *qos_control;
2713
f359d3fe 2714 qos_control = (__le16 *) skb_push(skb, 2);
c29b9b9b
JB		 2715 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2716 /*
2717 * Maybe we could actually set some fields here, for now just
2718 * initialise to zero to indicate no special operation.
2719 */
2720 *qos_control = 0;
2721 } else
2722 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2723
d57a544d 2724 skb_reset_mac_header(skb);
e2ebc74d 2725
489ee919 2726 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2727 memset(info, 0, sizeof(*info));
2728
a729cff8
JB		 2729 info->flags = info_flags;
2730 info->ack_frame_id = info_id;
73c4e195 2731 info->band = band;
a729cff8 2732
4c9451ed
JB		 2733 return skb;
2734 free:
2735 kfree_skb(skb);
2736 return ERR_PTR(ret);
2737}
2738
17c18bf8
JB		 2739/*
2740 * fast-xmit overview
2741 *
2742 * The core idea of this fast-xmit is to remove per-packet checks by checking
2743 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2744 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2745 * much less work can be done per packet. For example, fragmentation must be
2746 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2747 * in the code here.
2748 *
2749 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2750 * header and other data to aid packet processing in ieee80211_xmit_fast().
2751 *
2752 * The most difficult part of this is that when any of these assumptions
2753 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2754 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2755 * since the per-packet code no longer checks the conditions. This is reflected
2756 * by the calls to these functions throughout the rest of the code, and must be
2757 * maintained if any of the TX path checks change.
2758 */
2759
2760void ieee80211_check_fast_xmit(struct sta_info *sta)
2761{
2762 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2763 struct ieee80211_local *local = sta->local;
2764 struct ieee80211_sub_if_data *sdata = sta->sdata;
2765 struct ieee80211_hdr *hdr = (void *)build.hdr;
2766 struct ieee80211_chanctx_conf *chanctx_conf;
2767 __le16 fc;
2768
30686bf7 2769 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 2770 return;
2771
2772 /* Locking here protects both the pointer itself, and against concurrent
2773 * invocations winning data access races to, e.g., the key pointer that
2774 * is used.
2775 * Without it, the invocation of this function right after the key
2776 * pointer changes wouldn't be sufficient, as another CPU could access
2777 * the pointer, then stall, and then do the cache update after the CPU
2778 * that invalidated the key.
2779 * With the locking, such scenarios cannot happen as the check for the
2780 * key and the fast-tx assignment are done atomically, so the CPU that
2781 * modifies the key will either wait or other one will see the key
2782 * cleared/changed already.
2783 */
2784 spin_lock_bh(&sta->lock);
30686bf7
JB		 2785 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2786 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 2787 sdata->vif.type == NL80211_IFTYPE_STATION)
2788 goto out;
2789
2790 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2791 goto out;
2792
2793 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2794 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 2795 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2796 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 2797 goto out;
2798
2799 if (sdata->noack_map)
2800 goto out;
2801
2802 /* fast-xmit doesn't handle fragmentation at all */
725b812c
JB		 2803 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2804 !local->ops->set_frag_threshold)
17c18bf8
JB		 2805 goto out;
2806
2807 rcu_read_lock();
2808 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2809 if (!chanctx_conf) {
2810 rcu_read_unlock();
2811 goto out;
2812 }
2813 build.band = chanctx_conf->def.chan->band;
2814 rcu_read_unlock();
2815
2816 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2817
2818 switch (sdata->vif.type) {
3ffd8840
JB		 2819 case NL80211_IFTYPE_ADHOC:
2820 /* DA SA BSSID */
2821 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2822 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2823 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2824 build.hdr_len = 24;
2825 break;
17c18bf8
JB		 2826 case NL80211_IFTYPE_STATION:
2827 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2828 /* DA SA BSSID */
2829 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2830 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2831 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2832 build.hdr_len = 24;
2833 break;
2834 }
2835
2836 if (sdata->u.mgd.use_4addr) {
2837 /* non-regular ethertype cannot use the fastpath */
2838 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2839 IEEE80211_FCTL_TODS);
2840 /* RA TA DA SA */
2841 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2842 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2843 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2844 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2845 build.hdr_len = 30;
2846 break;
2847 }
2848 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2849 /* BSSID SA DA */
2850 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2851 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2852 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2853 build.hdr_len = 24;
2854 break;
2855 case NL80211_IFTYPE_AP_VLAN:
2856 if (sdata->wdev.use_4addr) {
2857 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2858 IEEE80211_FCTL_TODS);
2859 /* RA TA DA SA */
2860 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2861 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2862 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2863 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2864 build.hdr_len = 30;
2865 break;
2866 }
2867 /* fall through */
2868 case NL80211_IFTYPE_AP:
2869 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2870 /* DA BSSID SA */
2871 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2872 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2873 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2874 build.hdr_len = 24;
2875 break;
2876 default:
2877 /* not handled on fast-xmit */
2878 goto out;
2879 }
2880
2881 if (sta->sta.wme) {
2882 build.hdr_len += 2;
2883 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2884 }
2885
2886 /* We store the key here so there's no point in using rcu_dereference()
2887 * but that's fine because the code that changes the pointers will call
2888 * this function after doing so. For a single CPU that would be enough,
2889 * for multiple see the comment above.
2890 */
2891 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2892 if (!build.key)
2893 build.key = rcu_access_pointer(sdata->default_unicast_key);
2894 if (build.key) {
e495c247 2895 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 2896
2897 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2898 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
e495c247 2899 mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC;
17c18bf8
JB		 2900
2901 /* don't handle software crypto */
2902 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2903 goto out;
2904
2905 switch (build.key->conf.cipher) {
2906 case WLAN_CIPHER_SUITE_CCMP:
2907 case WLAN_CIPHER_SUITE_CCMP_256:
2908 /* add fixed key ID */
2909 if (gen_iv) {
2910 (build.hdr + build.hdr_len)[3] =
2911 0x20 | (build.key->conf.keyidx << 6);
2912 build.pn_offs = build.hdr_len;
2913 }
2914 if (gen_iv || iv_spc)
2915 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2916 break;
2917 case WLAN_CIPHER_SUITE_GCMP:
2918 case WLAN_CIPHER_SUITE_GCMP_256:
2919 /* add fixed key ID */
2920 if (gen_iv) {
2921 (build.hdr + build.hdr_len)[3] =
2922 0x20 | (build.key->conf.keyidx << 6);
2923 build.pn_offs = build.hdr_len;
2924 }
2925 if (gen_iv || iv_spc)
2926 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2927 break;
e495c247
JB		 2928 case WLAN_CIPHER_SUITE_TKIP:
2929 /* cannot handle MMIC or IV generation in xmit-fast */
2930 if (mmic || gen_iv)
2931 goto out;
2932 if (iv_spc)
2933 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2934 break;
2935 case WLAN_CIPHER_SUITE_WEP40:
2936 case WLAN_CIPHER_SUITE_WEP104:
2937 /* cannot handle IV generation in fast-xmit */
2938 if (gen_iv)
2939 goto out;
2940 if (iv_spc)
2941 build.hdr_len += IEEE80211_WEP_IV_LEN;
2942 break;
2943 case WLAN_CIPHER_SUITE_AES_CMAC:
2944 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2945 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2946 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2947 WARN(1,
2948 "management cipher suite 0x%x enabled for data\n",
2949 build.key->conf.cipher);
17c18bf8 2950 goto out;
e495c247
JB		 2951 default:
2952 /* we don't know how to generate IVs for this at all */
2953 if (WARN_ON(gen_iv))
2954 goto out;
2955 /* pure hardware keys are OK, of course */
2956 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2957 break;
2958 /* cipher scheme might require space allocation */
2959 if (iv_spc &&
2960 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2961 goto out;
2962 if (iv_spc)
2963 build.hdr_len += build.key->conf.iv_len;
17c18bf8
JB		 2964 }
2965
2966 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2967 }
2968
2969 hdr->frame_control = fc;
2970
2971 memcpy(build.hdr + build.hdr_len,
2972 rfc1042_header, sizeof(rfc1042_header));
2973 build.hdr_len += sizeof(rfc1042_header);
2974
2975 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
2976 /* if the kmemdup fails, continue w/o fast_tx */
2977 if (!fast_tx)
2978 goto out;
2979
2980 out:
2981 /* we might have raced against another call to this function */
2982 old = rcu_dereference_protected(sta->fast_tx,
2983 lockdep_is_held(&sta->lock));
2984 rcu_assign_pointer(sta->fast_tx, fast_tx);
2985 if (old)
2986 kfree_rcu(old, rcu_head);
2987 spin_unlock_bh(&sta->lock);
2988}
2989
2990void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
2991{
2992 struct sta_info *sta;
2993
2994 rcu_read_lock();
2995 list_for_each_entry_rcu(sta, &local->sta_list, list)
2996 ieee80211_check_fast_xmit(sta);
2997 rcu_read_unlock();
2998}
2999
3000void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3001{
3002 struct ieee80211_local *local = sdata->local;
3003 struct sta_info *sta;
3004
3005 rcu_read_lock();
3006
3007 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3008 if (sdata != sta->sdata &&
3009 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3010 continue;
3011 ieee80211_check_fast_xmit(sta);
3012 }
3013
3014 rcu_read_unlock();
3015}
3016
3017void ieee80211_clear_fast_xmit(struct sta_info *sta)
3018{
3019 struct ieee80211_fast_tx *fast_tx;
3020
3021 spin_lock_bh(&sta->lock);
3022 fast_tx = rcu_dereference_protected(sta->fast_tx,
3023 lockdep_is_held(&sta->lock));
3024 RCU_INIT_POINTER(sta->fast_tx, NULL);
3025 spin_unlock_bh(&sta->lock);
3026
3027 if (fast_tx)
3028 kfree_rcu(fast_tx, rcu_head);
3029}
3030
6e0456b5
FF		 3031static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3032 struct sk_buff *skb, int headroom,
3033 int *subframe_len)
3034{
3035 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3036 int padding = (4 - amsdu_len) & 3;
3037
3038 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3039 I802_DEBUG_INC(local->tx_expand_skb_head);
3040
3041 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3042 wiphy_debug(local->hw.wiphy,
3043 "failed to reallocate TX buffer\n");
3044 return false;
3045 }
3046 }
3047
3048 if (padding) {
3049 *subframe_len += padding;
3050 memset(skb_put(skb, padding), 0, padding);
3051 }
3052
3053 return true;
3054}
3055
3056static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3057 struct ieee80211_fast_tx *fast_tx,
3058 struct sk_buff *skb)
3059{
3060 struct ieee80211_local *local = sdata->local;
3061 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3062 struct ieee80211_hdr *hdr;
3063 struct ethhdr amsdu_hdr;
3064 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3065 int subframe_len = skb->len - hdr_len;
3066 void *data;
3067 u8 *qc;
3068
3069 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3070 return false;
3071
3072 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3073 return true;
3074
3075 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(amsdu_hdr),
3076 &subframe_len))
3077 return false;
3078
3079 amsdu_hdr.h_proto = cpu_to_be16(subframe_len);
3080 memcpy(amsdu_hdr.h_source, skb->data + fast_tx->sa_offs, ETH_ALEN);
3081 memcpy(amsdu_hdr.h_dest, skb->data + fast_tx->da_offs, ETH_ALEN);
3082
3083 data = skb_push(skb, sizeof(amsdu_hdr));
3084 memmove(data, data + sizeof(amsdu_hdr), hdr_len);
3085 memcpy(data + hdr_len, &amsdu_hdr, sizeof(amsdu_hdr));
3086
3087 hdr = data;
3088 qc = ieee80211_get_qos_ctl(hdr);
3089 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3090
3091 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3092
3093 return true;
3094}
3095
3096static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3097 struct sta_info *sta,
3098 struct ieee80211_fast_tx *fast_tx,
3099 struct sk_buff *skb)
3100{
3101 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3102 struct fq *fq = &local->fq;
3103 struct fq_tin *tin;
3104 struct fq_flow *flow;
6e0456b5
FF		 3105 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3106 struct ieee80211_txq *txq = sta->sta.txq[tid];
3107 struct txq_info *txqi;
3108 struct sk_buff **frag_tail, *head;
3109 int subframe_len = skb->len - ETH_ALEN;
3110 u8 max_subframes = sta->sta.max_amsdu_subframes;
3111 int max_frags = local->hw.max_tx_fragments;
3112 int max_amsdu_len = sta->sta.max_amsdu_len;
3113 __be16 len;
3114 void *data;
3115 bool ret = false;
fa962b92 3116 unsigned int orig_len;
6e0456b5
FF		 3117 int n = 1, nfrags;
3118
3119 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3120 return false;
3121
3122 if (!txq)
3123 return false;
3124
3125 txqi = to_txq_info(txq);
3126 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3127 return false;
3128
3129 if (sta->sta.max_rc_amsdu_len)
3130 max_amsdu_len = min_t(int, max_amsdu_len,
3131 sta->sta.max_rc_amsdu_len);
3132
fa962b92 3133 spin_lock_bh(&fq->lock);
6e0456b5 3134
fa962b92
MK		 3135 /* TODO: Ideally aggregation should be done on dequeue to remain
3136 * responsive to environment changes.
3137 */
3138
3139 tin = &txqi->tin;
3140 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3141 head = skb_peek_tail(&flow->queue);
6e0456b5
FF		 3142 if (!head)
3143 goto out;
3144
fa962b92
MK		 3145 orig_len = head->len;
3146
6e0456b5
FF		 3147 if (skb->len + head->len > max_amsdu_len)
3148 goto out;
3149
3150 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3151 goto out;
3152
3153 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3154 nfrags += 1 + skb_shinfo(head)->nr_frags;
3155 frag_tail = &skb_shinfo(head)->frag_list;
3156 while (*frag_tail) {
3157 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3158 frag_tail = &(*frag_tail)->next;
3159 n++;
3160 }
3161
3162 if (max_subframes && n > max_subframes)
3163 goto out;
3164
3165 if (max_frags && nfrags > max_frags)
3166 goto out;
3167
3168 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3169 &subframe_len))
3170 goto out;
3171
3172 ret = true;
3173 data = skb_push(skb, ETH_ALEN + 2);
3174 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3175
3176 data += 2 * ETH_ALEN;
3177 len = cpu_to_be16(subframe_len);
3178 memcpy(data, &len, 2);
3179 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3180
3181 head->len += skb->len;
3182 head->data_len += skb->len;
3183 *frag_tail = skb;
3184
fa962b92
MK		 3185 flow->backlog += head->len - orig_len;
3186 tin->backlog_bytes += head->len - orig_len;
3187
3188 fq_recalc_backlog(fq, tin, flow);
3189
6e0456b5 3190out:
fa962b92 3191 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3192
3193 return ret;
3194}
3195
bb42f2d1
THJ		 3196/*
3197 * Can be called while the sta lock is held. Anything that can cause packets to
3198 * be generated will cause deadlock!
3199 */
3200static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3201 struct sta_info *sta, u8 pn_offs,
3202 struct ieee80211_key *key,
3203 struct sk_buff *skb)
3204{
3205 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3206 struct ieee80211_hdr *hdr = (void *)skb->data;
3207 u8 tid = IEEE80211_NUM_TIDS;
3208
3209 if (key)
3210 info->control.hw_key = &key->conf;
3211
3212 ieee80211_tx_stats(skb->dev, skb->len);
3213
3214 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3215 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3216 *ieee80211_get_qos_ctl(hdr) = tid;
3217 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3218 } else {
3219 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3220 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3221 sdata->sequence_number += 0x10;
3222 }
3223
3224 if (skb_shinfo(skb)->gso_size)
3225 sta->tx_stats.msdu[tid] +=
3226 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3227 else
3228 sta->tx_stats.msdu[tid]++;
3229
3230 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3231
3232 /* statistics normally done by ieee80211_tx_h_stats (but that
3233 * has to consider fragmentation, so is more complex)
3234 */
3235 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3236 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3237
3238 if (pn_offs) {
3239 u64 pn;
3240 u8 *crypto_hdr = skb->data + pn_offs;
3241
3242 switch (key->conf.cipher) {
3243 case WLAN_CIPHER_SUITE_CCMP:
3244 case WLAN_CIPHER_SUITE_CCMP_256:
3245 case WLAN_CIPHER_SUITE_GCMP:
3246 case WLAN_CIPHER_SUITE_GCMP_256:
3247 pn = atomic64_inc_return(&key->conf.tx_pn);
3248 crypto_hdr[0] = pn;
3249 crypto_hdr[1] = pn >> 8;
3250 crypto_hdr[4] = pn >> 16;
3251 crypto_hdr[5] = pn >> 24;
3252 crypto_hdr[6] = pn >> 32;
3253 crypto_hdr[7] = pn >> 40;
3254 break;
3255 }
3256 }
3257}
3258
17c18bf8 3259static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
bb42f2d1 3260 struct sta_info *sta,
17c18bf8
JB		 3261 struct ieee80211_fast_tx *fast_tx,
3262 struct sk_buff *skb)
3263{
3264 struct ieee80211_local *local = sdata->local;
3265 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3266 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3267 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3268 struct ethhdr eth;
3269 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3270 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3271 struct ieee80211_tx_data tx;
3272 ieee80211_tx_result r;
3273 struct tid_ampdu_tx *tid_tx = NULL;
3274 u8 tid = IEEE80211_NUM_TIDS;
3275
3276 /* control port protocol needs a lot of special handling */
3277 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3278 return false;
3279
3280 /* only RFC 1042 SNAP */
3281 if (ethertype < ETH_P_802_3_MIN)
3282 return false;
3283
3284 /* don't handle TX status request here either */
3285 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3286 return false;
3287
3288 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3289 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3290 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
472be00d
JB		 3291 if (tid_tx) {
3292 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3293 return false;
3294 if (tid_tx->timeout)
3295 tid_tx->last_tx = jiffies;
3296 }
17c18bf8
JB		 3297 }
3298
3299 /* after this point (skb is modified) we cannot return false */
3300
3301 if (skb_shared(skb)) {
3302 struct sk_buff *tmp_skb = skb;
3303
3304 skb = skb_clone(skb, GFP_ATOMIC);
3305 kfree_skb(tmp_skb);
3306
3307 if (!skb)
3308 return true;
3309 }
3310
6e0456b5
FF		 3311 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3312 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3313 return true;
3314
17c18bf8
JB		 3315 /* will not be crypto-handled beyond what we do here, so use false
3316 * as the may-encrypt argument for the resize to not account for
3317 * more room than we already have in 'extra_head'
3318 */
3319 if (unlikely(ieee80211_skb_resize(sdata, skb,
3320 max_t(int, extra_head + hw_headroom -
3321 skb_headroom(skb), 0),
3322 false))) {
3323 kfree_skb(skb);
3324 return true;
3325 }
3326
3327 memcpy(&eth, skb->data, ETH_HLEN - 2);
3328 hdr = (void *)skb_push(skb, extra_head);
3329 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3330 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3331 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3332
3333 memset(info, 0, sizeof(*info));
3334 info->band = fast_tx->band;
3335 info->control.vif = &sdata->vif;
3336 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3337 IEEE80211_TX_CTL_DONTFRAG |
3338 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
bb42f2d1 3339 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
17c18bf8
JB		 3340
3341 __skb_queue_head_init(&tx.skbs);
3342
3343 tx.flags = IEEE80211_TX_UNICAST;
3344 tx.local = local;
3345 tx.sdata = sdata;
3346 tx.sta = sta;
3347 tx.key = fast_tx->key;
3348
30686bf7 3349 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
17c18bf8
JB		 3350 tx.skb = skb;
3351 r = ieee80211_tx_h_rate_ctrl(&tx);
3352 skb = tx.skb;
3353 tx.skb = NULL;
3354
3355 if (r != TX_CONTINUE) {
3356 if (r != TX_QUEUED)
3357 kfree_skb(skb);
3358 return true;
3359 }
3360 }
3361
bb42f2d1
THJ		 3362 if (ieee80211_queue_skb(local, sdata, sta, skb))
3363 return true;
17c18bf8 3364
bb42f2d1
THJ		 3365 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3366 fast_tx->key, skb);
17c18bf8
JB		 3367
3368 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3369 sdata = container_of(sdata->bss,
3370 struct ieee80211_sub_if_data, u.ap);
3371
3372 __skb_queue_tail(&tx.skbs, skb);
3373 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3374 return true;
3375}
3376
e0e2efff
THJ		 3377struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3378 struct ieee80211_txq *txq)
3379{
3380 struct ieee80211_local *local = hw_to_local(hw);
3381 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3382 struct ieee80211_hdr *hdr;
3383 struct sk_buff *skb = NULL;
3384 struct fq *fq = &local->fq;
3385 struct fq_tin *tin = &txqi->tin;
bb42f2d1
THJ		 3386 struct ieee80211_tx_info *info;
3387 struct ieee80211_tx_data tx;
3388 ieee80211_tx_result r;
e0e2efff
THJ		 3389
3390 spin_lock_bh(&fq->lock);
3391
3392 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3393 goto out;
3394
bb42f2d1
THJ		 3395 /* Make sure fragments stay together. */
3396 skb = __skb_dequeue(&txqi->frags);
3397 if (skb)
3398 goto out;
3399
3400begin:
e0e2efff
THJ		 3401 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3402 if (!skb)
3403 goto out;
3404
3405 ieee80211_set_skb_vif(skb, txqi);
3406
3407 hdr = (struct ieee80211_hdr *)skb->data;
bb42f2d1
THJ		 3408 info = IEEE80211_SKB_CB(skb);
3409
3410 memset(&tx, 0, sizeof(tx));
3411 __skb_queue_head_init(&tx.skbs);
3412 tx.local = local;
3413 tx.skb = skb;
3414 tx.sdata = vif_to_sdata(info->control.vif);
3415
3416 if (txq->sta)
3417 tx.sta = container_of(txq->sta, struct sta_info, sta);
3418
3419 /*
3420 * The key can be removed while the packet was queued, so need to call
3421 * this here to get the current key.
3422 */
3423 r = ieee80211_tx_h_select_key(&tx);
3424 if (r != TX_CONTINUE) {
3425 ieee80211_free_txskb(&local->hw, skb);
3426 goto begin;
3427 }
3428
3429 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
e0e2efff
THJ		 3430 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3431 sta);
bb42f2d1 3432 u8 pn_offs = 0;
e0e2efff 3433
bb42f2d1
THJ		 3434 if (tx.key &&
3435 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3436 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3437
3438 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3439 tx.key, skb);
3440 } else {
3441 if (invoke_tx_handlers_late(&tx))
3442 goto begin;
3443
3444 skb = __skb_dequeue(&tx.skbs);
3445
3446 if (!skb_queue_empty(&tx.skbs))
3447 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
e0e2efff
THJ		 3448 }
3449
3450out:
3451 spin_unlock_bh(&fq->lock);
3452
3453 if (skb && skb_has_frag_list(skb) &&
3454 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST))
3455 skb_linearize(skb);
3456
3457 return skb;
3458}
3459EXPORT_SYMBOL(ieee80211_tx_dequeue);
3460
4c9451ed
JB		 3461void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3462 struct net_device *dev,
3463 u32 info_flags)
3464{
3465 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
97ffe757 3466 struct sta_info *sta;
80616c0d 3467 struct sk_buff *next;
4c9451ed
JB		 3468
3469 if (unlikely(skb->len < ETH_HLEN)) {
3470 kfree_skb(skb);
3471 return;
3472 }
3473
3474 rcu_read_lock();
e2ebc74d 3475
2d981fdd
JB		 3476 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3477 goto out_free;
4c9451ed 3478
17c18bf8
JB		 3479 if (!IS_ERR_OR_NULL(sta)) {
3480 struct ieee80211_fast_tx *fast_tx;
3481
3482 fast_tx = rcu_dereference(sta->fast_tx);
3483
3484 if (fast_tx &&
bb42f2d1 3485 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
17c18bf8
JB		 3486 goto out;
3487 }
3488
80616c0d
JB		 3489 if (skb_is_gso(skb)) {
3490 struct sk_buff *segs;
680a0dab 3491
80616c0d
JB		 3492 segs = skb_gso_segment(skb, 0);
3493 if (IS_ERR(segs)) {
2d981fdd 3494 goto out_free;
80616c0d
JB		 3495 } else if (segs) {
3496 consume_skb(skb);
3497 skb = segs;
3498 }
3499 } else {
3500 /* we cannot process non-linear frames on this path */
3501 if (skb_linearize(skb)) {
3502 kfree_skb(skb);
3503 goto out;
3504 }
3505
3506 /* the frame could be fragmented, software-encrypted, and other
3507 * things so we cannot really handle checksum offload with it -
3508 * fix it up in software before we handle anything else.
3509 */
3510 if (skb->ip_summed == CHECKSUM_PARTIAL) {
f603f1f3
JB		 3511 skb_set_transport_header(skb,
3512 skb_checksum_start_offset(skb));
80616c0d
JB		 3513 if (skb_checksum_help(skb))
3514 goto out_free;
3515 }
2d981fdd
JB		 3516 }
3517
80616c0d
JB		 3518 next = skb;
3519 while (next) {
3520 skb = next;
3521 next = skb->next;
4c9451ed 3522
80616c0d
JB		 3523 skb->prev = NULL;
3524 skb->next = NULL;
3525
3526 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3527 if (IS_ERR(skb))
3528 goto out;
e2ebc74d 3529
5a490510 3530 ieee80211_tx_stats(dev, skb->len);
80616c0d
JB		 3531
3532 ieee80211_xmit(sdata, sta, skb);
3533 }
2d981fdd
JB		 3534 goto out;
3535 out_free:
3536 kfree_skb(skb);
4c9451ed 3537 out:
55de908a 3538 rcu_read_unlock();
e2ebc74d
JB		 3539}
3540
4c9451ed
JB		 3541/**
3542 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3543 * @skb: packet to be sent
3544 * @dev: incoming interface
3545 *
3546 * On failure skb will be freed.
3547 */
24d342c5
LK		 3548netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3549 struct net_device *dev)
3550{
3551 __ieee80211_subif_start_xmit(skb, dev, 0);
3552 return NETDEV_TX_OK;
3553}
e2ebc74d 3554
7528ec57
JB		 3555struct sk_buff *
3556ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3557 struct sk_buff *skb, u32 info_flags)
3558{
3559 struct ieee80211_hdr *hdr;
3560 struct ieee80211_tx_data tx = {
3561 .local = sdata->local,
3562 .sdata = sdata,
3563 };
97ffe757 3564 struct sta_info *sta;
7528ec57
JB		 3565
3566 rcu_read_lock();
3567
97ffe757
JB		 3568 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3569 kfree_skb(skb);
3570 skb = ERR_PTR(-EINVAL);
3571 goto out;
3572 }
3573
3574 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
7528ec57
JB		 3575 if (IS_ERR(skb))
3576 goto out;
3577
3578 hdr = (void *)skb->data;
3579 tx.sta = sta_info_get(sdata, hdr->addr1);
3580 tx.skb = skb;
3581
3582 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3583 rcu_read_unlock();
3584 kfree_skb(skb);
3585 return ERR_PTR(-EINVAL);
3586 }
3587
3588out:
3589 rcu_read_unlock();
3590 return skb;
3591}
3592
e2530083
JB		 3593/*
3594 * ieee80211_clear_tx_pending may not be called in a context where
3595 * it is possible that it packets could come in again.
3596 */
e2ebc74d
JB		 3597void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3598{
1f98ab7f 3599 struct sk_buff *skb;
2de8e0d9 3600 int i;
e2ebc74d 3601
1f98ab7f
FF		 3602 for (i = 0; i < local->hw.queues; i++) {
3603 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3604 ieee80211_free_txskb(&local->hw, skb);
3605 }
e2ebc74d
JB		 3606}
3607
7bb45683
JB		 3608/*
3609 * Returns false if the frame couldn't be transmitted but was queued instead,
3610 * which in this case means re-queued -- take as an indication to stop sending
3611 * more pending frames.
3612 */
cd8ffc80
JB		 3613static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3614 struct sk_buff *skb)
3615{
3616 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3617 struct ieee80211_sub_if_data *sdata;
3618 struct sta_info *sta;
3619 struct ieee80211_hdr *hdr;
7bb45683 3620 bool result;
55de908a 3621 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 3622
5061b0c2 3623 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 3624
3625 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 3626 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3627 if (unlikely(!chanctx_conf)) {
3628 dev_kfree_skb(skb);
3629 return true;
3630 }
73c4e195 3631 info->band = chanctx_conf->def.chan->band;
7c10770f 3632 result = ieee80211_tx(sdata, NULL, skb, true);
cd8ffc80 3633 } else {
252b86c4
JB		 3634 struct sk_buff_head skbs;
3635
3636 __skb_queue_head_init(&skbs);
3637 __skb_queue_tail(&skbs, skb);
3638
cd8ffc80 3639 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 3640 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 3641
74e4dbfd 3642 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 3643 }
3644
cd8ffc80
JB		 3645 return result;
3646}
3647
e2530083 3648/*
3b8d81e0 3649 * Transmit all pending packets. Called from tasklet.
e2530083 3650 */
e2ebc74d
JB		 3651void ieee80211_tx_pending(unsigned long data)
3652{
3653 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 3654 unsigned long flags;
cd8ffc80 3655 int i;
3b8d81e0 3656 bool txok;
e2ebc74d 3657
f0e72851 3658 rcu_read_lock();
e2530083 3659
3b8d81e0 3660 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 3661 for (i = 0; i < local->hw.queues; i++) {
3662 /*
3663 * If queue is stopped by something other than due to pending
3664 * frames, or we have no pending frames, proceed to next queue.
3665 */
3b8d81e0 3666 if (local->queue_stop_reasons[i] ||
2a577d98 3667 skb_queue_empty(&local->pending[i]))
e2ebc74d 3668 continue;
e2530083 3669
2a577d98 3670 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 3671 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 3672 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 3673
a7bc376c 3674 if (WARN_ON(!info->control.vif)) {
c3e7724b 3675 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 3676 continue;
3677 }
3678
3b8d81e0
JB		 3679 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3680 flags);
3681
3682 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 3683 spin_lock_irqsave(&local->queue_stop_reason_lock,
3684 flags);
3685 if (!txok)
2a577d98 3686 break;
e2ebc74d 3687 }
7236fe29
JB		 3688
3689 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 3690 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 3691 }
3b8d81e0 3692 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 3693
f0e72851 3694 rcu_read_unlock();
e2ebc74d
JB		 3695}
3696
3697/* functions for drivers to get certain frames */
3698
eac70c13 3699static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3700 struct ps_data *ps, struct sk_buff *skb,
3701 bool is_template)
e2ebc74d
JB		 3702{
3703 u8 *pos, *tim;
3704 int aid0 = 0;
3705 int i, have_bits = 0, n1, n2;
3706
3707 /* Generate bitmap for TIM only if there are any STAs in power save
3708 * mode. */
d012a605 3709 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 3710 /* in the hope that this is faster than
3711 * checking byte-for-byte */
f359d3fe 3712 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 3713 IEEE80211_MAX_AID+1);
6ec8c332
AO		 3714 if (!is_template) {
3715 if (ps->dtim_count == 0)
3716 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3717 else
3718 ps->dtim_count--;
3719 }
e2ebc74d
JB		 3720
3721 tim = pos = (u8 *) skb_put(skb, 6);
3722 *pos++ = WLAN_EID_TIM;
3723 *pos++ = 4;
d012a605 3724 *pos++ = ps->dtim_count;
8860020e 3725 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 3726
d012a605 3727 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 3728 aid0 = 1;
3729
d012a605 3730 ps->dtim_bc_mc = aid0 == 1;
512119b3 3731
e2ebc74d
JB		 3732 if (have_bits) {
3733 /* Find largest even number N1 so that bits numbered 1 through
3734 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3735 * (N2 + 1) x 8 through 2007 are 0. */
3736 n1 = 0;
3737 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 3738 if (ps->tim[i]) {
e2ebc74d
JB		 3739 n1 = i & 0xfe;
3740 break;
3741 }
3742 }
3743 n2 = n1;
3744 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 3745 if (ps->tim[i]) {
e2ebc74d
JB		 3746 n2 = i;
3747 break;
3748 }
3749 }
3750
3751 /* Bitmap control */
3752 *pos++ = n1 | aid0;
3753 /* Part Virt Bitmap */
5220da39 3754 skb_put(skb, n2 - n1);
d012a605 3755 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 3756
3757 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 3758 } else {
3759 *pos++ = aid0; /* Bitmap control */
3760 *pos++ = 0; /* Part Virt Bitmap */
3761 }
e2ebc74d
JB		 3762}
3763
eac70c13 3764static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3765 struct ps_data *ps, struct sk_buff *skb,
3766 bool is_template)
eac70c13
MP		 3767{
3768 struct ieee80211_local *local = sdata->local;
3769
3770 /*
3771 * Not very nice, but we want to allow the driver to call
3772 * ieee80211_beacon_get() as a response to the set_tim()
3773 * callback. That, however, is already invoked under the
3774 * sta_lock to guarantee consistent and race-free update
3775 * of the tim bitmap in mac80211 and the driver.
3776 */
3777 if (local->tim_in_locked_section) {
6ec8c332 3778 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
eac70c13 3779 } else {
1b91731d 3780 spin_lock_bh(&local->tim_lock);
6ec8c332 3781 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
1b91731d 3782 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 3783 }
3784
3785 return 0;
3786}
3787
1af586c9
AO		 3788static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
3789 struct beacon_data *beacon)
73da7d5b
SW		 3790{
3791 struct probe_resp *resp;
cd7760e6
SW		 3792 u8 *beacon_data;
3793 size_t beacon_data_len;
0d06d9ba 3794 int i;
af296bdb 3795 u8 count = beacon->csa_current_counter;
cd7760e6
SW		 3796
3797 switch (sdata->vif.type) {
3798 case NL80211_IFTYPE_AP:
3799 beacon_data = beacon->tail;
3800 beacon_data_len = beacon->tail_len;
3801 break;
3802 case NL80211_IFTYPE_ADHOC:
3803 beacon_data = beacon->head;
3804 beacon_data_len = beacon->head_len;
3805 break;
b8456a14
CYY		 3806 case NL80211_IFTYPE_MESH_POINT:
3807 beacon_data = beacon->head;
3808 beacon_data_len = beacon->head_len;
3809 break;
cd7760e6
SW		 3810 default:
3811 return;
3812 }
73da7d5b 3813
af296bdb 3814 rcu_read_lock();
0d06d9ba 3815 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
af296bdb 3816 resp = rcu_dereference(sdata->u.ap.probe_resp);
0d06d9ba 3817
af296bdb
MK		 3818 if (beacon->csa_counter_offsets[i]) {
3819 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
3820 beacon_data_len)) {
0d06d9ba
AO		 3821 rcu_read_unlock();
3822 return;
3823 }
af296bdb
MK		 3824
3825 beacon_data[beacon->csa_counter_offsets[i]] = count;
73da7d5b 3826 }
af296bdb
MK		 3827
3828 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
3829 resp->data[resp->csa_counter_offsets[i]] = count;
73da7d5b 3830 }
af296bdb 3831 rcu_read_unlock();
1af586c9
AO		 3832}
3833
e996ec2a
WD		 3834static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
3835{
3836 beacon->csa_current_counter--;
3837
3838 /* the counter should never reach 0 */
3839 WARN_ON_ONCE(!beacon->csa_current_counter);
3840
3841 return beacon->csa_current_counter;
3842}
3843
1af586c9
AO		 3844u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
3845{
3846 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
af296bdb
MK		 3847 struct beacon_data *beacon = NULL;
3848 u8 count = 0;
0d06d9ba 3849
af296bdb
MK		 3850 rcu_read_lock();
3851
3852 if (sdata->vif.type == NL80211_IFTYPE_AP)
3853 beacon = rcu_dereference(sdata->u.ap.beacon);
3854 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3855 beacon = rcu_dereference(sdata->u.ibss.presp);
3856 else if (ieee80211_vif_is_mesh(&sdata->vif))
3857 beacon = rcu_dereference(sdata->u.mesh.beacon);
3858
3859 if (!beacon)
3860 goto unlock;
3861
e996ec2a 3862 count = __ieee80211_csa_update_counter(beacon);
1af586c9 3863
af296bdb
MK		 3864unlock:
3865 rcu_read_unlock();
3866 return count;
73da7d5b 3867}
1af586c9 3868EXPORT_SYMBOL(ieee80211_csa_update_counter);
73da7d5b
SW		 3869
3870bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
3871{
3872 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3873 struct beacon_data *beacon = NULL;
3874 u8 *beacon_data;
3875 size_t beacon_data_len;
73da7d5b
SW		 3876 int ret = false;
3877
3878 if (!ieee80211_sdata_running(sdata))
3879 return false;
3880
3881 rcu_read_lock();
3882 if (vif->type == NL80211_IFTYPE_AP) {
3883 struct ieee80211_if_ap *ap = &sdata->u.ap;
3884
3885 beacon = rcu_dereference(ap->beacon);
3886 if (WARN_ON(!beacon || !beacon->tail))
3887 goto out;
3888 beacon_data = beacon->tail;
3889 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 3890 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
3891 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3892
3893 beacon = rcu_dereference(ifibss->presp);
3894 if (!beacon)
3895 goto out;
3896
b8456a14
CYY		 3897 beacon_data = beacon->head;
3898 beacon_data_len = beacon->head_len;
3899 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
3900 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3901
3902 beacon = rcu_dereference(ifmsh->beacon);
3903 if (!beacon)
3904 goto out;
3905
cd7760e6
SW		 3906 beacon_data = beacon->head;
3907 beacon_data_len = beacon->head_len;
73da7d5b
SW		 3908 } else {
3909 WARN_ON(1);
3910 goto out;
3911 }
3912
10d78f27
MK		 3913 if (!beacon->csa_counter_offsets[0])
3914 goto out;
3915
af296bdb 3916 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 3917 goto out;
3918
af296bdb 3919 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
73da7d5b
SW		 3920 ret = true;
3921 out:
3922 rcu_read_unlock();
3923
3924 return ret;
3925}
3926EXPORT_SYMBOL(ieee80211_csa_is_complete);
3927
6ec8c332
AO		 3928static struct sk_buff *
3929__ieee80211_beacon_get(struct ieee80211_hw *hw,
3930 struct ieee80211_vif *vif,
3931 struct ieee80211_mutable_offsets *offs,
3932 bool is_template)
e2ebc74d
JB		 3933{
3934 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 3935 struct beacon_data *beacon = NULL;
9d139c81 3936 struct sk_buff *skb = NULL;
e039fa4a 3937 struct ieee80211_tx_info *info;
e2ebc74d 3938 struct ieee80211_sub_if_data *sdata = NULL;
57fbcce3 3939 enum nl80211_band band;
e00cfce0 3940 struct ieee80211_tx_rate_control txrc;
55de908a 3941 struct ieee80211_chanctx_conf *chanctx_conf;
1af586c9 3942 int csa_off_base = 0;
8318d78a 3943
5dfdaf58 3944 rcu_read_lock();
e2ebc74d 3945
32bfd35d 3946 sdata = vif_to_sdata(vif);
55de908a 3947 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 3948
55de908a 3949 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 3950 goto out;
3951
6ec8c332
AO		 3952 if (offs)
3953 memset(offs, 0, sizeof(*offs));
eddcbb94 3954
05c914fe 3955 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605 3956 struct ieee80211_if_ap *ap = &sdata->u.ap;
d012a605 3957
af296bdb 3958 beacon = rcu_dereference(ap->beacon);
3ad97fbc 3959 if (beacon) {
10d78f27 3960 if (beacon->csa_counter_offsets[0]) {
1af586c9 3961 if (!is_template)
e996ec2a 3962 __ieee80211_csa_update_counter(beacon);
1af586c9
AO		 3963
3964 ieee80211_set_csa(sdata, beacon);
3965 }
73da7d5b 3966
902acc78
JB		 3967 /*
3968 * headroom, head length,
3969 * tail length and maximum TIM length
3970 */
3971 skb = dev_alloc_skb(local->tx_headroom +
3972 beacon->head_len +
70dabeb7
FF		 3973 beacon->tail_len + 256 +
3974 local->hw.extra_beacon_tailroom);
902acc78
JB		 3975 if (!skb)
3976 goto out;
33b64eb2 3977
902acc78
JB		 3978 skb_reserve(skb, local->tx_headroom);
3979 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3980 beacon->head_len);
33b64eb2 3981
6ec8c332
AO		 3982 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
3983 is_template);
33b64eb2 3984
6ec8c332
AO		 3985 if (offs) {
3986 offs->tim_offset = beacon->head_len;
3987 offs->tim_length = skb->len - beacon->head_len;
1af586c9
AO		 3988
3989 /* for AP the csa offsets are from tail */
3990 csa_off_base = skb->len;
6ec8c332 3991 }
eddcbb94 3992
902acc78
JB		 3993 if (beacon->tail)
3994 memcpy(skb_put(skb, beacon->tail_len),
3995 beacon->tail, beacon->tail_len);
9d139c81
JB		 3996 } else
3997 goto out;
05c914fe 3998 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 3999 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 4000 struct ieee80211_hdr *hdr;
33b64eb2 4001
af296bdb
MK		 4002 beacon = rcu_dereference(ifibss->presp);
4003 if (!beacon)
9d139c81
JB		 4004 goto out;
4005
10d78f27 4006 if (beacon->csa_counter_offsets[0]) {
1af586c9 4007 if (!is_template)
e996ec2a 4008 __ieee80211_csa_update_counter(beacon);
cd7760e6 4009
af296bdb 4010 ieee80211_set_csa(sdata, beacon);
1af586c9 4011 }
cd7760e6 4012
af296bdb 4013 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 4014 local->hw.extra_beacon_tailroom);
9d139c81
JB		 4015 if (!skb)
4016 goto out;
c3ffeab4 4017 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 4018 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4019 beacon->head_len);
9d139c81
JB		 4020
4021 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 4022 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4023 IEEE80211_STYPE_BEACON);
902acc78 4024 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 4025 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 4026
af296bdb
MK		 4027 beacon = rcu_dereference(ifmsh->beacon);
4028 if (!beacon)
ac1bd846 4029 goto out;
ac1bd846 4030
10d78f27 4031 if (beacon->csa_counter_offsets[0]) {
1af586c9
AO		 4032 if (!is_template)
4033 /* TODO: For mesh csa_counter is in TU, so
4034 * decrementing it by one isn't correct, but
4035 * for now we leave it consistent with overall
4036 * mac80211's behavior.
4037 */
e996ec2a 4038 __ieee80211_csa_update_counter(beacon);
1af586c9 4039
af296bdb 4040 ieee80211_set_csa(sdata, beacon);
1af586c9 4041 }
b8456a14 4042
dbf498fb 4043 if (ifmsh->sync_ops)
af296bdb 4044 ifmsh->sync_ops->adjust_tbtt(sdata, beacon);
dbf498fb 4045
3b69a9c5 4046 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 4047 beacon->head_len +
3f52b7e3 4048 256 + /* TIM IE */
af296bdb 4049 beacon->tail_len +
70dabeb7 4050 local->hw.extra_beacon_tailroom);
902acc78
JB		 4051 if (!skb)
4052 goto out;
2b5e1967 4053 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 4054 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4055 beacon->head_len);
6ec8c332
AO		 4056 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4057
4058 if (offs) {
af296bdb
MK		 4059 offs->tim_offset = beacon->head_len;
4060 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 4061 }
4062
af296bdb
MK		 4063 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
4064 beacon->tail_len);
9d139c81
JB		 4065 } else {
4066 WARN_ON(1);
5dfdaf58 4067 goto out;
e2ebc74d
JB		 4068 }
4069
1af586c9 4070 /* CSA offsets */
af296bdb 4071 if (offs && beacon) {
1af586c9
AO		 4072 int i;
4073
4074 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
af296bdb 4075 u16 csa_off = beacon->csa_counter_offsets[i];
1af586c9
AO		 4076
4077 if (!csa_off)
4078 continue;
4079
4080 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4081 }
4082 }
4083
4bf88530 4084 band = chanctx_conf->def.chan->band;
55de908a 4085
e039fa4a
JB		 4086 info = IEEE80211_SKB_CB(skb);
4087
3b8d81e0 4088 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 4089 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 4090 info->band = band;
e00cfce0
JM		 4091
4092 memset(&txrc, 0, sizeof(txrc));
4093 txrc.hw = hw;
e31583cd 4094 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 4095 txrc.bss_conf = &sdata->vif.bss_conf;
4096 txrc.skb = skb;
4097 txrc.reported_rate.idx = -1;
37eb0b16 4098 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
e31583cd 4099 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
37eb0b16
JM		 4100 txrc.max_rate_idx = -1;
4101 else
4102 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
8f0729b1 4103 txrc.bss = true;
e00cfce0 4104 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 4105
4106 info->control.vif = vif;
f591fa5d 4107
a472e71b
JL		 4108 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4109 IEEE80211_TX_CTL_ASSIGN_SEQ |
4110 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 4111 out:
5dfdaf58 4112 rcu_read_unlock();
e2ebc74d 4113 return skb;
6ec8c332
AO		 4114
4115}
4116
4117struct sk_buff *
4118ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4119 struct ieee80211_vif *vif,
4120 struct ieee80211_mutable_offsets *offs)
4121{
4122 return __ieee80211_beacon_get(hw, vif, offs, true);
4123}
4124EXPORT_SYMBOL(ieee80211_beacon_get_template);
4125
4126struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4127 struct ieee80211_vif *vif,
4128 u16 *tim_offset, u16 *tim_length)
4129{
4130 struct ieee80211_mutable_offsets offs = {};
4131 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
35afa588
HS		 4132 struct sk_buff *copy;
4133 struct ieee80211_supported_band *sband;
4134 int shift;
4135
4136 if (!bcn)
4137 return bcn;
6ec8c332
AO		 4138
4139 if (tim_offset)
4140 *tim_offset = offs.tim_offset;
4141
4142 if (tim_length)
4143 *tim_length = offs.tim_length;
4144
35afa588
HS		 4145 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4146 !hw_to_local(hw)->monitors)
4147 return bcn;
4148
4149 /* send a copy to monitor interfaces */
4150 copy = skb_copy(bcn, GFP_ATOMIC);
4151 if (!copy)
4152 return bcn;
4153
4154 shift = ieee80211_vif_get_shift(vif);
4155 sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))];
4156 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4157
6ec8c332 4158 return bcn;
e2ebc74d 4159}
eddcbb94 4160EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 4161
02945821
AN		 4162struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4163 struct ieee80211_vif *vif)
4164{
4165 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 4166 struct sk_buff *skb = NULL;
4167 struct probe_resp *presp = NULL;
02945821
AN		 4168 struct ieee80211_hdr *hdr;
4169 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4170
4171 if (sdata->vif.type != NL80211_IFTYPE_AP)
4172 return NULL;
4173
4174 rcu_read_lock();
4175
4176 ap = &sdata->u.ap;
4177 presp = rcu_dereference(ap->probe_resp);
4178 if (!presp)
4179 goto out;
4180
aa7a0080 4181 skb = dev_alloc_skb(presp->len);
02945821
AN		 4182 if (!skb)
4183 goto out;
4184
aa7a0080
ES		 4185 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
4186
02945821
AN		 4187 hdr = (struct ieee80211_hdr *) skb->data;
4188 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4189
4190out:
4191 rcu_read_unlock();
4192 return skb;
4193}
4194EXPORT_SYMBOL(ieee80211_proberesp_get);
4195
7044cc56
KV		 4196struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4197 struct ieee80211_vif *vif)
4198{
4199 struct ieee80211_sub_if_data *sdata;
4200 struct ieee80211_if_managed *ifmgd;
4201 struct ieee80211_pspoll *pspoll;
4202 struct ieee80211_local *local;
4203 struct sk_buff *skb;
4204
4205 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4206 return NULL;
4207
4208 sdata = vif_to_sdata(vif);
4209 ifmgd = &sdata->u.mgd;
4210 local = sdata->local;
4211
4212 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 4213 if (!skb)
7044cc56 4214 return NULL;
d15b8459 4215
7044cc56
KV		 4216 skb_reserve(skb, local->hw.extra_tx_headroom);
4217
4218 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
4219 memset(pspoll, 0, sizeof(*pspoll));
4220 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4221 IEEE80211_STYPE_PSPOLL);
4222 pspoll->aid = cpu_to_le16(ifmgd->aid);
4223
4224 /* aid in PS-Poll has its two MSBs each set to 1 */
4225 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4226
4227 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4228 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4229
4230 return skb;
4231}
4232EXPORT_SYMBOL(ieee80211_pspoll_get);
4233
4234struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4235 struct ieee80211_vif *vif)
4236{
4237 struct ieee80211_hdr_3addr *nullfunc;
4238 struct ieee80211_sub_if_data *sdata;
4239 struct ieee80211_if_managed *ifmgd;
4240 struct ieee80211_local *local;
4241 struct sk_buff *skb;
4242
4243 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4244 return NULL;
4245
4246 sdata = vif_to_sdata(vif);
4247 ifmgd = &sdata->u.mgd;
4248 local = sdata->local;
4249
4250 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
d15b8459 4251 if (!skb)
7044cc56 4252 return NULL;
d15b8459 4253
7044cc56
KV		 4254 skb_reserve(skb, local->hw.extra_tx_headroom);
4255
4256 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
4257 sizeof(*nullfunc));
4258 memset(nullfunc, 0, sizeof(*nullfunc));
4259 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4260 IEEE80211_STYPE_NULLFUNC |
4261 IEEE80211_FCTL_TODS);
4262 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4263 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4264 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4265
4266 return skb;
4267}
4268EXPORT_SYMBOL(ieee80211_nullfunc_get);
4269
05e54ea6 4270struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 4271 const u8 *src_addr,
05e54ea6 4272 const u8 *ssid, size_t ssid_len,
b9a9ada1 4273 size_t tailroom)
05e54ea6 4274{
a344d677 4275 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 4276 struct ieee80211_hdr_3addr *hdr;
4277 struct sk_buff *skb;
4278 size_t ie_ssid_len;
4279 u8 *pos;
4280
05e54ea6
KV		 4281 ie_ssid_len = 2 + ssid_len;
4282
4283 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 4284 ie_ssid_len + tailroom);
d15b8459 4285 if (!skb)
05e54ea6 4286 return NULL;
05e54ea6
KV		 4287
4288 skb_reserve(skb, local->hw.extra_tx_headroom);
4289
4290 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
4291 memset(hdr, 0, sizeof(*hdr));
4292 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4293 IEEE80211_STYPE_PROBE_REQ);
e83e6541 4294 eth_broadcast_addr(hdr->addr1);
a344d677 4295 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 4296 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 4297
4298 pos = skb_put(skb, ie_ssid_len);
4299 *pos++ = WLAN_EID_SSID;
4300 *pos++ = ssid_len;
88c868c4 4301 if (ssid_len)
05e54ea6
KV		 4302 memcpy(pos, ssid, ssid_len);
4303 pos += ssid_len;
4304
05e54ea6
KV		 4305 return skb;
4306}
4307EXPORT_SYMBOL(ieee80211_probereq_get);
4308
32bfd35d 4309void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4310 const void *frame, size_t frame_len,
e039fa4a 4311 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4312 struct ieee80211_rts *rts)
4313{
4314 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4315
065e9605
HH		 4316 rts->frame_control =
4317 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 4318 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4319 frame_txctl);
e2ebc74d
JB		 4320 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4321 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4322}
4323EXPORT_SYMBOL(ieee80211_rts_get);
4324
32bfd35d 4325void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4326 const void *frame, size_t frame_len,
e039fa4a 4327 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4328 struct ieee80211_cts *cts)
4329{
4330 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4331
065e9605
HH		 4332 cts->frame_control =
4333 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 4334 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4335 frame_len, frame_txctl);
e2ebc74d
JB		 4336 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4337}
4338EXPORT_SYMBOL(ieee80211_ctstoself_get);
4339
4340struct sk_buff *
32bfd35d 4341ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 4342 struct ieee80211_vif *vif)
e2ebc74d
JB		 4343{
4344 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 4345 struct sk_buff *skb = NULL;
5cf121c3 4346 struct ieee80211_tx_data tx;
e2ebc74d 4347 struct ieee80211_sub_if_data *sdata;
d012a605 4348 struct ps_data *ps;
e039fa4a 4349 struct ieee80211_tx_info *info;
55de908a 4350 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 4351
32bfd35d 4352 sdata = vif_to_sdata(vif);
5dfdaf58 4353
5dfdaf58 4354 rcu_read_lock();
55de908a 4355 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 4356
d012a605
MP		 4357 if (!chanctx_conf)
4358 goto out;
4359
4360 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4361 struct beacon_data *beacon =
4362 rcu_dereference(sdata->u.ap.beacon);
4363
4364 if (!beacon || !beacon->head)
4365 goto out;
4366
4367 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 4368 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4369 ps = &sdata->u.mesh.ps;
d012a605 4370 } else {
747cf5e9 4371 goto out;
d012a605 4372 }
5dfdaf58 4373
d012a605 4374 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 4375 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 4376
e2ebc74d 4377 while (1) {
d012a605 4378 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 4379 if (!skb)
747cf5e9 4380 goto out;
e2ebc74d
JB		 4381 local->total_ps_buffered--;
4382
d012a605 4383 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 4384 struct ieee80211_hdr *hdr =
4385 (struct ieee80211_hdr *) skb->data;
4386 /* more buffered multicast/broadcast frames ==> set
4387 * MoreData flag in IEEE 802.11 header to inform PS
4388 * STAs */
4389 hdr->frame_control |=
4390 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4391 }
4392
112c44b2 4393 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 4394 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 4395 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 4396 break;
6b07d9ca 4397 ieee80211_free_txskb(hw, skb);
e2ebc74d 4398 }
e039fa4a
JB		 4399
4400 info = IEEE80211_SKB_CB(skb);
4401
5cf121c3 4402 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 4403 info->band = chanctx_conf->def.chan->band;
e2ebc74d 4404
97b045d6 4405 if (invoke_tx_handlers(&tx))
e2ebc74d 4406 skb = NULL;
97b045d6 4407 out:
d0709a65 4408 rcu_read_unlock();
e2ebc74d
JB		 4409
4410 return skb;
4411}
4412EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 4413
b6da911b
LK		 4414int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4415{
4416 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4417 struct ieee80211_sub_if_data *sdata = sta->sdata;
4418 struct ieee80211_local *local = sdata->local;
4419 int ret;
4420 u32 queues;
4421
4422 lockdep_assert_held(&local->sta_mtx);
4423
4424 /* only some cases are supported right now */
4425 switch (sdata->vif.type) {
4426 case NL80211_IFTYPE_STATION:
4427 case NL80211_IFTYPE_AP:
4428 case NL80211_IFTYPE_AP_VLAN:
4429 break;
4430 default:
4431 WARN_ON(1);
4432 return -EINVAL;
4433 }
4434
4435 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4436 return -EINVAL;
4437
4438 if (sta->reserved_tid == tid) {
4439 ret = 0;
4440 goto out;
4441 }
4442
4443 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4444 sdata_err(sdata, "TID reservation already active\n");
4445 ret = -EALREADY;
4446 goto out;
4447 }
4448
4449 ieee80211_stop_vif_queues(sdata->local, sdata,
4450 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4451
4452 synchronize_net();
4453
4454 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 4455 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 4456 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4457 __ieee80211_stop_tx_ba_session(sta, tid,
4458 AGG_STOP_LOCAL_REQUEST);
4459 }
4460
4461 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 4462 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 4463
4464 sta->reserved_tid = tid;
4465
4466 ieee80211_wake_vif_queues(local, sdata,
4467 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4468
30686bf7 4469 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 4470 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4471
4472 ret = 0;
4473 out:
4474 return ret;
4475}
4476EXPORT_SYMBOL(ieee80211_reserve_tid);
4477
4478void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4479{
4480 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4481 struct ieee80211_sub_if_data *sdata = sta->sdata;
4482
4483 lockdep_assert_held(&sdata->local->sta_mtx);
4484
4485 /* only some cases are supported right now */
4486 switch (sdata->vif.type) {
4487 case NL80211_IFTYPE_STATION:
4488 case NL80211_IFTYPE_AP:
4489 case NL80211_IFTYPE_AP_VLAN:
4490 break;
4491 default:
4492 WARN_ON(1);
4493 return;
4494 }
4495
4496 if (tid != sta->reserved_tid) {
4497 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4498 return;
4499 }
4500
4501 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4502}
4503EXPORT_SYMBOL(ieee80211_unreserve_tid);
4504
55de908a
JB		 4505void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4506 struct sk_buff *skb, int tid,
57fbcce3 4507 enum nl80211_band band)
3b8d81e0 4508{
353d09c6 4509 int ac = ieee802_1d_to_ac[tid & 7];
3a25a8c8 4510
d57a544d 4511 skb_reset_mac_header(skb);
3a25a8c8 4512 skb_set_queue_mapping(skb, ac);
cf6bb79a 4513 skb->priority = tid;
cf0277e7 4514
89afe614
JB		 4515 skb->dev = sdata->dev;
4516
3d34deb6
JB		 4517 /*
4518 * The other path calling ieee80211_xmit is from the tasklet,
4519 * and while we can handle concurrent transmissions locking
4520 * requirements are that we do not come into tx with bhs on.
4521 */
4522 local_bh_disable();
73c4e195 4523 IEEE80211_SKB_CB(skb)->band = band;
7c10770f 4524 ieee80211_xmit(sdata, NULL, skb);
3d34deb6 4525 local_bh_enable();
3b8d81e0 4526}
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