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qede: Fix multicast mac configuration
[linux-block.git] / net / mac80211 / tx.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
e2ebc74d
JB		 2/*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
d98ad83e 7 * Copyright 2013-2014 Intel Mobile Communications GmbH
914eac24 8 * Copyright (C) 2018 Intel Corporation
e2ebc74d 9 *
e2ebc74d
JB		 10 * Transmit and frame generation functions.
11 */
12
13#include <linux/kernel.h>
14#include <linux/slab.h>
15#include <linux/skbuff.h>
ebceec86 16#include <linux/if_vlan.h>
e2ebc74d
JB		 17#include <linux/etherdevice.h>
18#include <linux/bitmap.h>
d4e46a3d 19#include <linux/rcupdate.h>
bc3b2d7f 20#include <linux/export.h>
881d966b 21#include <net/net_namespace.h>
e2ebc74d
JB		 22#include <net/ieee80211_radiotap.h>
23#include <net/cfg80211.h>
24#include <net/mac80211.h>
5caa328e
MK		 25#include <net/codel.h>
26#include <net/codel_impl.h>
e2ebc74d 27#include <asm/unaligned.h>
fa962b92 28#include <net/fq_impl.h>
e2ebc74d
JB		 29
30#include "ieee80211_i.h"
24487981 31#include "driver-ops.h"
2c8dccc7 32#include "led.h"
33b64eb2 33#include "mesh.h"
e2ebc74d
JB		 34#include "wep.h"
35#include "wpa.h"
36#include "wme.h"
2c8dccc7 37#include "rate.h"
e2ebc74d 38
e2ebc74d
JB		 39/* misc utils */
40
5a490510
JB		 41static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
42{
43 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
44
45 u64_stats_update_begin(&tstats->syncp);
46 tstats->tx_packets++;
47 tstats->tx_bytes += len;
48 u64_stats_update_end(&tstats->syncp);
49}
50
252b86c4
JB		 51static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
52 struct sk_buff *skb, int group_addr,
03f93c3d 53 int next_frag_len)
e2ebc74d 54{
2103dec1 55 int rate, mrate, erp, dur, i, shift = 0;
2e92e6f2 56 struct ieee80211_rate *txrate;
e2ebc74d 57 struct ieee80211_local *local = tx->local;
8318d78a 58 struct ieee80211_supported_band *sband;
358c8d9d 59 struct ieee80211_hdr *hdr;
252b86c4 60 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2103dec1
SW		 61 struct ieee80211_chanctx_conf *chanctx_conf;
62 u32 rate_flags = 0;
63
95cd470c
FF		 64 /* assume HW handles this */
65 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
66 return 0;
67
2103dec1
SW		 68 rcu_read_lock();
69 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
70 if (chanctx_conf) {
71 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
72 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
73 }
74 rcu_read_unlock();
e6a9854b 75
e6a9854b 76 /* uh huh? */
0d528d85 77 if (WARN_ON_ONCE(tx->rate.idx < 0))
e6a9854b 78 return 0;
e2ebc74d 79
2d56577b 80 sband = local->hw.wiphy->bands[info->band];
0d528d85 81 txrate = &sband->bitrates[tx->rate.idx];
8318d78a 82
e6a9854b 83 erp = txrate->flags & IEEE80211_RATE_ERP_G;
e2ebc74d
JB		 84
85 /*
86 * data and mgmt (except PS Poll):
87 * - during CFP: 32768
88 * - during contention period:
89 * if addr1 is group address: 0
90 * if more fragments = 0 and addr1 is individual address: time to
91 * transmit one ACK plus SIFS
92 * if more fragments = 1 and addr1 is individual address: time to
93 * transmit next fragment plus 2 x ACK plus 3 x SIFS
94 *
95 * IEEE 802.11, 9.6:
96 * - control response frame (CTS or ACK) shall be transmitted using the
97 * same rate as the immediately previous frame in the frame exchange
98 * sequence, if this rate belongs to the PHY mandatory rates, or else
99 * at the highest possible rate belonging to the PHY rates in the
100 * BSSBasicRateSet
101 */
252b86c4 102 hdr = (struct ieee80211_hdr *)skb->data;
358c8d9d 103 if (ieee80211_is_ctl(hdr->frame_control)) {
e2ebc74d 104 /* TODO: These control frames are not currently sent by
ccd7b362 105 * mac80211, but should they be implemented, this function
e2ebc74d
JB		 106 * needs to be updated to support duration field calculation.
107 *
108 * RTS: time needed to transmit pending data/mgmt frame plus
109 * one CTS frame plus one ACK frame plus 3 x SIFS
110 * CTS: duration of immediately previous RTS minus time
111 * required to transmit CTS and its SIFS
112 * ACK: 0 if immediately previous directed data/mgmt had
113 * more=0, with more=1 duration in ACK frame is duration
114 * from previous frame minus time needed to transmit ACK
115 * and its SIFS
116 * PS Poll: BIT(15) | BIT(14) | aid
117 */
118 return 0;
119 }
120
121 /* data/mgmt */
122 if (0 /* FIX: data/mgmt during CFP */)
03f93c3d 123 return cpu_to_le16(32768);
e2ebc74d
JB		 124
125 if (group_addr) /* Group address as the destination - no ACK */
126 return 0;
127
128 /* Individual destination address:
129 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
130 * CTS and ACK frames shall be transmitted using the highest rate in
131 * basic rate set that is less than or equal to the rate of the
132 * immediately previous frame and that is using the same modulation
133 * (CCK or OFDM). If no basic rate set matches with these requirements,
134 * the highest mandatory rate of the PHY that is less than or equal to
135 * the rate of the previous frame is used.
136 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
137 */
138 rate = -1;
8318d78a
JB		 139 /* use lowest available if everything fails */
140 mrate = sband->bitrates[0].bitrate;
141 for (i = 0; i < sband->n_bitrates; i++) {
142 struct ieee80211_rate *r = &sband->bitrates[i];
e2ebc74d 143
8318d78a
JB		 144 if (r->bitrate > txrate->bitrate)
145 break;
e2ebc74d 146
2103dec1
SW		 147 if ((rate_flags & r->flags) != rate_flags)
148 continue;
149
bda3933a 150 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
2103dec1 151 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
8318d78a
JB		 152
153 switch (sband->band) {
57fbcce3 154 case NL80211_BAND_2GHZ: {
8318d78a
JB		 155 u32 flag;
156 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
157 flag = IEEE80211_RATE_MANDATORY_G;
158 else
159 flag = IEEE80211_RATE_MANDATORY_B;
160 if (r->flags & flag)
161 mrate = r->bitrate;
162 break;
163 }
57fbcce3 164 case NL80211_BAND_5GHZ:
c5b9a7f8 165 case NL80211_BAND_6GHZ:
8318d78a
JB		 166 if (r->flags & IEEE80211_RATE_MANDATORY_A)
167 mrate = r->bitrate;
168 break;
57fbcce3 169 case NL80211_BAND_60GHZ:
3a0c52a6 170 /* TODO, for now fall through */
57fbcce3 171 case NUM_NL80211_BANDS:
8318d78a
JB		 172 WARN_ON(1);
173 break;
174 }
e2ebc74d
JB		 175 }
176 if (rate == -1) {
177 /* No matching basic rate found; use highest suitable mandatory
178 * PHY rate */
2103dec1 179 rate = DIV_ROUND_UP(mrate, 1 << shift);
e2ebc74d
JB		 180 }
181
6674f210
SW		 182 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
183 if (ieee80211_is_data_qos(hdr->frame_control) &&
c26a0e10 184 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
6674f210
SW		 185 dur = 0;
186 else
187 /* Time needed to transmit ACK
188 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
189 * to closest integer */
4ee73f33 190 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
438b61b7
SW		 191 tx->sdata->vif.bss_conf.use_short_preamble,
192 shift);
e2ebc74d
JB		 193
194 if (next_frag_len) {
195 /* Frame is fragmented: duration increases with time needed to
196 * transmit next fragment plus ACK and 2 x SIFS. */
197 dur *= 2; /* ACK + SIFS */
198 /* next fragment */
4ee73f33 199 dur += ieee80211_frame_duration(sband->band, next_frag_len,
8318d78a 200 txrate->bitrate, erp,
438b61b7
SW		 201 tx->sdata->vif.bss_conf.use_short_preamble,
202 shift);
e2ebc74d
JB		 203 }
204
03f93c3d 205 return cpu_to_le16(dur);
e2ebc74d
JB		 206}
207
e2ebc74d 208/* tx handlers */
5c1b98a5
KV		 209static ieee80211_tx_result debug_noinline
210ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
211{
212 struct ieee80211_local *local = tx->local;
0c74211d 213 struct ieee80211_if_managed *ifmgd;
94a5b3ac 214 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
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
94a5b3ac
AO		 243 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
244 return TX_CONTINUE;
245
0c74211d
KV		 246 ifmgd = &tx->sdata->u.mgd;
247
248 /*
249 * Don't wakeup from power save if u-apsd is enabled, voip ac has
250 * u-apsd enabled and the frame is in voip class. This effectively
251 * means that even if all access categories have u-apsd enabled, in
252 * practise u-apsd is only used with the voip ac. This is a
253 * workaround for the case when received voip class packets do not
254 * have correct qos tag for some reason, due the network or the
255 * peer application.
256 *
dc41e4d4 257 * Note: ifmgd->uapsd_queues access is racy here. If the value is
0c74211d
KV		 258 * changed via debugfs, user needs to reassociate manually to have
259 * everything in sync.
260 */
4875d30d
JB		 261 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
262 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
263 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
0c74211d
KV		 264 return TX_CONTINUE;
265
5c1b98a5
KV		 266 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
267 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 268 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 269 IEEE80211_QUEUE_STOP_REASON_PS,
270 false);
db28569a 271 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
5c1b98a5
KV		 272 ieee80211_queue_work(&local->hw,
273 &local->dynamic_ps_disable_work);
274 }
275
5db1c07c
LC		 276 /* Don't restart the timer if we're not disassociated */
277 if (!ifmgd->associated)
278 return TX_CONTINUE;
279
5c1b98a5
KV		 280 mod_timer(&local->dynamic_ps_timer, jiffies +
281 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
282
283 return TX_CONTINUE;
284}
e2ebc74d 285
d9e8a70f 286static ieee80211_tx_result debug_noinline
5cf121c3 287ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
e2ebc74d 288{
358c8d9d 289
e039fa4a 290 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
e039fa4a 291 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
c2c98fde 292 bool assoc = false;
e2ebc74d 293
e039fa4a 294 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
9ae54c84 295 return TX_CONTINUE;
58d4185e 296
b23b025f
BG		 297 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
298 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
a9a6ffff
KV		 299 !ieee80211_is_probe_req(hdr->frame_control) &&
300 !ieee80211_is_nullfunc(hdr->frame_control))
301 /*
302 * When software scanning only nullfunc frames (to notify
303 * the sleep state to the AP) and probe requests (for the
304 * active scan) are allowed, all other frames should not be
305 * sent and we should not get here, but if we do
306 * nonetheless, drop them to avoid sending them
307 * off-channel. See the link below and
308 * ieee80211_start_scan() for more.
309 *
310 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
311 */
9ae54c84 312 return TX_DROP;
e2ebc74d 313
239281f8
RL		 314 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
315 return TX_CONTINUE;
316
1be7fe8d
BJ		 317 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
318 return TX_CONTINUE;
319
5cf121c3 320 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
9ae54c84 321 return TX_CONTINUE;
e2ebc74d 322
c2c98fde
JB		 323 if (tx->sta)
324 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
e2ebc74d 325
5cf121c3 326 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
c2c98fde 327 if (unlikely(!assoc &&
358c8d9d 328 ieee80211_is_data(hdr->frame_control))) {
e2ebc74d 329#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0
JB		 330 sdata_info(tx->sdata,
331 "dropped data frame to not associated station %pM\n",
332 hdr->addr1);
333#endif
e2ebc74d 334 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
9ae54c84 335 return TX_DROP;
e2ebc74d 336 }
72f15d53
MB		 337 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
338 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
29623892
JB		 339 /*
340 * No associated STAs - no need to send multicast
341 * frames.
342 */
343 return TX_DROP;
e2ebc74d
JB		 344 }
345
9ae54c84 346 return TX_CONTINUE;
e2ebc74d
JB		 347}
348
e2ebc74d
JB		 349/* This function is called whenever the AP is about to exceed the maximum limit
350 * of buffered frames for power saving STAs. This situation should not really
351 * happen often during normal operation, so dropping the oldest buffered packet
352 * from each queue should be OK to make some room for new frames. */
353static void purge_old_ps_buffers(struct ieee80211_local *local)
354{
355 int total = 0, purged = 0;
356 struct sk_buff *skb;
357 struct ieee80211_sub_if_data *sdata;
358 struct sta_info *sta;
359
79010420 360 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 361 struct ps_data *ps;
362
363 if (sdata->vif.type == NL80211_IFTYPE_AP)
364 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 365 else if (ieee80211_vif_is_mesh(&sdata->vif))
366 ps = &sdata->u.mesh.ps;
d012a605 367 else
e2ebc74d 368 continue;
d012a605
MP		 369
370 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 371 if (skb) {
372 purged++;
6b07d9ca 373 ieee80211_free_txskb(&local->hw, skb);
e2ebc74d 374 }
d012a605 375 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 376 }
e2ebc74d 377
948d887d
JB		 378 /*
379 * Drop one frame from each station from the lowest-priority
380 * AC that has frames at all.
381 */
d0709a65 382 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 383 int ac;
384
385 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
386 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
387 total += skb_queue_len(&sta->ps_tx_buf[ac]);
388 if (skb) {
389 purged++;
c3e7724b 390 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 391 break;
392 }
e2ebc74d 393 }
e2ebc74d 394 }
d0709a65 395
e2ebc74d 396 local->total_ps_buffered = total;
bdcbd8e0 397 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 398}
399
9ae54c84 400static ieee80211_tx_result
5cf121c3 401ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 402{
e039fa4a 403 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 404 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 405 struct ps_data *ps;
e039fa4a 406
7d54d0dd
JB		 407 /*
408 * broadcast/multicast frame
409 *
3f52b7e3 410 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 411 * the frame is buffered to be sent after DTIM beacon frame.
412 * This is done either by the hardware or us.
413 */
414
3f52b7e3 415 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 416 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
417 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
418 if (!tx->sdata->bss)
419 return TX_CONTINUE;
420
421 ps = &tx->sdata->bss->ps;
3f52b7e3
MP		 422 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
423 ps = &tx->sdata->u.mesh.ps;
d012a605 424 } else {
3e122be0 425 return TX_CONTINUE;
d012a605
MP		 426 }
427
3e122be0
JB		 428
429 /* no buffering for ordered frames */
358c8d9d 430 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 431 return TX_CONTINUE;
7d54d0dd 432
08b99399
JB		 433 if (ieee80211_is_probe_req(hdr->frame_control))
434 return TX_CONTINUE;
435
30686bf7 436 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
f4d57941
JB		 437 info->hw_queue = tx->sdata->vif.cab_queue;
438
9ec1190d
FF		 439 /* no stations in PS mode and no buffered packets */
440 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
9ae54c84 441 return TX_CONTINUE;
7d54d0dd 442
62b517cb 443 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
62b1208e 444
62b517cb 445 /* device releases frame after DTIM beacon */
30686bf7 446 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
62b1208e 447 return TX_CONTINUE;
62b1208e 448
7d54d0dd 449 /* buffered in mac80211 */
62b1208e
JB		 450 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
451 purge_old_ps_buffers(tx->local);
452
d012a605 453 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 454 ps_dbg(tx->sdata,
455 "BC TX buffer full - dropping the oldest frame\n");
6b07d9ca 456 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
62b1208e
JB		 457 } else
458 tx->local->total_ps_buffered++;
e2ebc74d 459
d012a605 460 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 461
62b1208e 462 return TX_QUEUED;
e2ebc74d
JB		 463}
464
fb733336
JM		 465static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
466 struct sk_buff *skb)
467{
468 if (!ieee80211_is_mgmt(fc))
469 return 0;
470
c2c98fde 471 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 472 return 0;
473
d8ca16db 474 if (!ieee80211_is_robust_mgmt_frame(skb))
fb733336
JM		 475 return 0;
476
477 return 1;
478}
479
9ae54c84 480static ieee80211_tx_result
5cf121c3 481ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 482{
483 struct sta_info *sta = tx->sta;
e039fa4a 484 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
08b99399 485 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 486 struct ieee80211_local *local = tx->local;
e2ebc74d 487
02f2f1a9 488 if (unlikely(!sta))
9ae54c84 489 return TX_CONTINUE;
e2ebc74d 490
c2c98fde 491 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
5ac2e350
JB		 492 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
493 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
02f2f1a9 494 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 495 int ac = skb_get_queue_mapping(tx->skb);
496
08b99399
JB		 497 if (ieee80211_is_mgmt(hdr->frame_control) &&
498 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
499 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
500 return TX_CONTINUE;
501 }
502
bdcbd8e0
JB		 503 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
504 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 505 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
506 purge_old_ps_buffers(tx->local);
1d147bfa
EG		 507
508 /* sync with ieee80211_sta_ps_deliver_wakeup */
509 spin_lock(&sta->ps_lock);
510 /*
511 * STA woke up the meantime and all the frames on ps_tx_buf have
512 * been queued to pending queue. No reordering can happen, go
513 * ahead and Tx the packet.
514 */
515 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
5ac2e350
JB		 516 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
517 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
1d147bfa
EG		 518 spin_unlock(&sta->ps_lock);
519 return TX_CONTINUE;
520 }
521
948d887d
JB		 522 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
523 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
bdcbd8e0
JB		 524 ps_dbg(tx->sdata,
525 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
526 sta->sta.addr, ac);
c3e7724b 527 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 528 } else
529 tx->local->total_ps_buffered++;
004c872e 530
e039fa4a 531 info->control.jiffies = jiffies;
5061b0c2 532 info->control.vif = &tx->sdata->vif;
8f77f384 533 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
03c8c06f 534 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
948d887d 535 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
1d147bfa 536 spin_unlock(&sta->ps_lock);
3393a608
JO		 537
538 if (!timer_pending(&local->sta_cleanup))
539 mod_timer(&local->sta_cleanup,
540 round_jiffies(jiffies +
541 STA_INFO_CLEANUP_INTERVAL));
542
c868cb35
JB		 543 /*
544 * We queued up some frames, so the TIM bit might
545 * need to be set, recalculate it.
546 */
547 sta_info_recalc_tim(sta);
548
9ae54c84 549 return TX_QUEUED;
bdcbd8e0
JB		 550 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
551 ps_dbg(tx->sdata,
552 "STA %pM in PS mode, but polling/in SP -> send frame\n",
553 sta->sta.addr);
e2ebc74d 554 }
e2ebc74d 555
9ae54c84 556 return TX_CONTINUE;
e2ebc74d
JB		 557}
558
d9e8a70f 559static ieee80211_tx_result debug_noinline
5cf121c3 560ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 561{
5cf121c3 562 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 563 return TX_CONTINUE;
e2ebc74d 564
5cf121c3 565 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 566 return ieee80211_tx_h_unicast_ps_buf(tx);
567 else
568 return ieee80211_tx_h_multicast_ps_buf(tx);
569}
570
a621fa4d
JB		 571static ieee80211_tx_result debug_noinline
572ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
573{
574 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
575
af61a165
JB		 576 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
577 if (tx->sdata->control_port_no_encrypt)
578 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
579 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
9c1c98a3 580 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
af61a165 581 }
a621fa4d
JB		 582
583 return TX_CONTINUE;
584}
585
d9e8a70f 586static ieee80211_tx_result debug_noinline
5cf121c3 587ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 588{
46e6de15 589 struct ieee80211_key *key;
e039fa4a 590 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 591 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 592
3b8d81e0 593 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
e2ebc74d 594 tx->key = NULL;
2475b1cc
MS		 595 else if (tx->sta &&
596 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
d4e46a3d 597 tx->key = key;
46f6b060
MH		 598 else if (ieee80211_is_group_privacy_action(tx->skb) &&
599 (key = rcu_dereference(tx->sdata->default_multicast_key)))
600 tx->key = key;
3cfcf6ac 601 else if (ieee80211_is_mgmt(hdr->frame_control) &&
ecbcd324 602 is_multicast_ether_addr(hdr->addr1) &&
d8ca16db 603 ieee80211_is_robust_mgmt_frame(tx->skb) &&
3cfcf6ac
JM		 604 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
605 tx->key = key;
f7e0104c
JB		 606 else if (is_multicast_ether_addr(hdr->addr1) &&
607 (key = rcu_dereference(tx->sdata->default_multicast_key)))
608 tx->key = key;
609 else if (!is_multicast_ether_addr(hdr->addr1) &&
610 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 611 tx->key = key;
e8f4fb7c 612 else
4922f71f 613 tx->key = NULL;
e2ebc74d
JB		 614
615 if (tx->key) {
813d7669
JB		 616 bool skip_hw = false;
617
011bfcc4 618 /* TODO: add threshold stuff again */
176e4f84 619
97359d12
JB		 620 switch (tx->key->conf.cipher) {
621 case WLAN_CIPHER_SUITE_WEP40:
622 case WLAN_CIPHER_SUITE_WEP104:
97359d12 623 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 624 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 625 tx->key = NULL;
626 break;
97359d12 627 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db 628 case WLAN_CIPHER_SUITE_CCMP_256:
00b9cfa3
JM		 629 case WLAN_CIPHER_SUITE_GCMP:
630 case WLAN_CIPHER_SUITE_GCMP_256:
fb733336
JM		 631 if (!ieee80211_is_data_present(hdr->frame_control) &&
632 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
46f6b060
MH		 633 tx->skb) &&
634 !ieee80211_is_group_privacy_action(tx->skb))
fb733336 635 tx->key = NULL;
3b43a187
KV		 636 else
637 skip_hw = (tx->key->conf.flags &
e548c49e 638 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 639 ieee80211_is_mgmt(hdr->frame_control);
fb733336 640 break;
97359d12 641 case WLAN_CIPHER_SUITE_AES_CMAC:
56c52da2 642 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
8ade538b
JM		 643 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
644 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3cfcf6ac
JM		 645 if (!ieee80211_is_mgmt(hdr->frame_control))
646 tx->key = NULL;
647 break;
176e4f84 648 }
813d7669 649
e54faf29
JB		 650 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
651 !ieee80211_is_deauth(hdr->frame_control)))
95acac61
JB		 652 return TX_DROP;
653
f12553eb 654 if (!skip_hw && tx->key &&
382b1655 655 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 656 info->control.hw_key = &tx->key->conf;
e2ebc74d
JB		 657 }
658
9ae54c84 659 return TX_CONTINUE;
e2ebc74d
JB		 660}
661
d9e8a70f 662static ieee80211_tx_result debug_noinline
5cf121c3 663ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 664{
e039fa4a 665 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 666 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
667 struct ieee80211_supported_band *sband;
a2c40249 668 u32 len;
e6a9854b 669 struct ieee80211_tx_rate_control txrc;
0d528d85 670 struct ieee80211_sta_rates *ratetbl = NULL;
c2c98fde 671 bool assoc = false;
8318d78a 672
e6a9854b 673 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 674
2d56577b 675 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 676
a2c40249 677 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 678 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 679
680 /* set up the tx rate control struct we give the RC algo */
005e472b 681 txrc.hw = &tx->local->hw;
e6a9854b
JB		 682 txrc.sband = sband;
683 txrc.bss_conf = &tx->sdata->vif.bss_conf;
684 txrc.skb = tx->skb;
685 txrc.reported_rate.idx = -1;
2d56577b 686 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
2ffbe6d3
FF		 687
688 if (tx->sdata->rc_has_mcs_mask[info->band])
689 txrc.rate_idx_mcs_mask =
690 tx->sdata->rc_rateidx_mcs_mask[info->band];
691
8f0729b1 692 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 693 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 694 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
695 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 696
697 /* set up RTS protection if desired */
b9a5f8ca 698 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 699 txrc.rts = true;
e2ebc74d 700 }
e2ebc74d 701
0d528d85 702 info->control.use_rts = txrc.rts;
991fec09
FF		 703 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
704
e6a9854b
JB		 705 /*
706 * Use short preamble if the BSS can handle it, but not for
707 * management frames unless we know the receiver can handle
708 * that -- the management frame might be to a station that
709 * just wants a probe response.
710 */
711 if (tx->sdata->vif.bss_conf.use_short_preamble &&
712 (ieee80211_is_data(hdr->frame_control) ||
c2c98fde 713 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 714 txrc.short_preamble = true;
715
716 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 717
dfdfc2be
SE		 718 /* don't ask rate control when rate already injected via radiotap */
719 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
720 return TX_CONTINUE;
721
c2c98fde
JB		 722 if (tx->sta)
723 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 724
725 /*
726 * Lets not bother rate control if we're associated and cannot
727 * talk to the sta. This should not happen.
728 */
c2c98fde 729 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 730 !rate_usable_index_exists(sband, &tx->sta->sta),
731 "%s: Dropped data frame as no usable bitrate found while "
732 "scanning and associated. Target station: "
733 "%pM on %d GHz band\n",
47846c9b 734 tx->sdata->name, hdr->addr1,
2d56577b 735 info->band ? 5 : 2))
b770b43e 736 return TX_DROP;
2e92e6f2 737
b770b43e
LR		 738 /*
739 * If we're associated with the sta at this point we know we can at
740 * least send the frame at the lowest bit rate.
741 */
e6a9854b
JB		 742 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
743
0d528d85
FF		 744 if (tx->sta && !info->control.skip_table)
745 ratetbl = rcu_dereference(tx->sta->sta.rates);
746
747 if (unlikely(info->control.rates[0].idx < 0)) {
748 if (ratetbl) {
749 struct ieee80211_tx_rate rate = {
750 .idx = ratetbl->rate[0].idx,
751 .flags = ratetbl->rate[0].flags,
752 .count = ratetbl->rate[0].count
753 };
754
755 if (ratetbl->rate[0].idx < 0)
756 return TX_DROP;
757
758 tx->rate = rate;
759 } else {
760 return TX_DROP;
761 }
762 } else {
763 tx->rate = info->control.rates[0];
764 }
e6a9854b 765
c1ce5a74 766 if (txrc.reported_rate.idx < 0) {
0d528d85 767 txrc.reported_rate = tx->rate;
c1ce5a74 768 if (tx->sta && ieee80211_is_data(hdr->frame_control))
e5a9f8d0 769 tx->sta->tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 770 } else if (tx->sta)
e5a9f8d0 771 tx->sta->tx_stats.last_rate = txrc.reported_rate;
e039fa4a 772
0d528d85
FF		 773 if (ratetbl)
774 return TX_CONTINUE;
775
e6a9854b
JB		 776 if (unlikely(!info->control.rates[0].count))
777 info->control.rates[0].count = 1;
e2ebc74d 778
9955151d
GS		 779 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
780 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
781 info->control.rates[0].count = 1;
782
e6a9854b
JB		 783 return TX_CONTINUE;
784}
785
ba8c3d6f
FF		 786static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
787{
788 u16 *seq = &sta->tid_seq[tid];
789 __le16 ret = cpu_to_le16(*seq);
790
791 /* Increase the sequence number. */
792 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
793
794 return ret;
795}
796
f591fa5d
JB		 797static ieee80211_tx_result debug_noinline
798ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
799{
800 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
801 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 802 int tid;
803
25d834e1
JB		 804 /*
805 * Packet injection may want to control the sequence
806 * number, if we have no matching interface then we
807 * neither assign one ourselves nor ask the driver to.
808 */
5061b0c2 809 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 810 return TX_CONTINUE;
811
f591fa5d
JB		 812 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
813 return TX_CONTINUE;
814
815 if (ieee80211_hdrlen(hdr->frame_control) < 24)
816 return TX_CONTINUE;
817
49a59543
JB		 818 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
819 return TX_CONTINUE;
820
94778280
JB		 821 /*
822 * Anything but QoS data that has a sequence number field
823 * (is long enough) gets a sequence number from the global
c4c205f3
BC		 824 * counter. QoS data frames with a multicast destination
825 * also use the global counter (802.11-2012 9.3.2.10).
94778280 826 */
c4c205f3
BC		 827 if (!ieee80211_is_data_qos(hdr->frame_control) ||
828 is_multicast_ether_addr(hdr->addr1)) {
b9771d41
JB		 829 if (tx->flags & IEEE80211_TX_NO_SEQNO)
830 return TX_CONTINUE;
94778280 831 /* driver should assign sequence number */
f591fa5d 832 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 833 /* for pure STA mode without beacons, we can do it */
834 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
835 tx->sdata->sequence_number += 0x10;
79c892b8 836 if (tx->sta)
e5a9f8d0 837 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 838 return TX_CONTINUE;
839 }
840
841 /*
842 * This should be true for injected/management frames only, for
843 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
844 * above since they are not QoS-data frames.
845 */
846 if (!tx->sta)
847 return TX_CONTINUE;
848
849 /* include per-STA, per-TID sequence counter */
a1f2ba04 850 tid = ieee80211_get_tid(hdr);
e5a9f8d0 851 tx->sta->tx_stats.msdu[tid]++;
f591fa5d 852
bb42f2d1 853 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
f591fa5d
JB		 854
855 return TX_CONTINUE;
856}
857
252b86c4 858static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 859 struct sk_buff *skb, int hdrlen,
860 int frag_threshold)
861{
252b86c4 862 struct ieee80211_local *local = tx->local;
a1a3fcec 863 struct ieee80211_tx_info *info;
252b86c4 864 struct sk_buff *tmp;
2de8e0d9
JB		 865 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
866 int pos = hdrlen + per_fragm;
867 int rem = skb->len - hdrlen - per_fragm;
868
869 if (WARN_ON(rem < 0))
870 return -EINVAL;
871
252b86c4
JB		 872 /* first fragment was already added to queue by caller */
873
2de8e0d9
JB		 874 while (rem) {
875 int fraglen = per_fragm;
876
877 if (fraglen > rem)
878 fraglen = rem;
879 rem -= fraglen;
880 tmp = dev_alloc_skb(local->tx_headroom +
881 frag_threshold +
2475b1cc 882 tx->sdata->encrypt_headroom +
2de8e0d9
JB		 883 IEEE80211_ENCRYPT_TAILROOM);
884 if (!tmp)
885 return -ENOMEM;
252b86c4
JB		 886
887 __skb_queue_tail(&tx->skbs, tmp);
888
2475b1cc
MS		 889 skb_reserve(tmp,
890 local->tx_headroom + tx->sdata->encrypt_headroom);
891
2de8e0d9
JB		 892 /* copy control information */
893 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 894
895 info = IEEE80211_SKB_CB(tmp);
896 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
897 IEEE80211_TX_CTL_FIRST_FRAGMENT);
898
899 if (rem)
900 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
901
2de8e0d9
JB		 902 skb_copy_queue_mapping(tmp, skb);
903 tmp->priority = skb->priority;
2de8e0d9 904 tmp->dev = skb->dev;
2de8e0d9
JB		 905
906 /* copy header and data */
59ae1d12
JB		 907 skb_put_data(tmp, skb->data, hdrlen);
908 skb_put_data(tmp, skb->data + pos, fraglen);
2de8e0d9
JB		 909
910 pos += fraglen;
911 }
912
252b86c4 913 /* adjust first fragment's length */
338f977f 914 skb_trim(skb, hdrlen + per_fragm);
2de8e0d9
JB		 915 return 0;
916}
917
d9e8a70f 918static ieee80211_tx_result debug_noinline
e2454948
JB		 919ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
920{
2de8e0d9
JB		 921 struct sk_buff *skb = tx->skb;
922 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
923 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 924 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 925 int hdrlen;
926 int fragnum;
e2454948 927
252b86c4
JB		 928 /* no matter what happens, tx->skb moves to tx->skbs */
929 __skb_queue_tail(&tx->skbs, skb);
930 tx->skb = NULL;
931
a26eb27a
JB		 932 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
933 return TX_CONTINUE;
934
f3fe4e93 935 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
e2454948
JB		 936 return TX_CONTINUE;
937
eefce91a
JB		 938 /*
939 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 940 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 941 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 942 */
8b30b1fe 943 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 944 return TX_DROP;
945
065e9605 946 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 947
a26eb27a 948 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 949 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 950 return TX_DROP;
e6a9854b 951
2de8e0d9
JB		 952 /*
953 * Now fragment the frame. This will allocate all the fragments and
954 * chain them (using skb as the first fragment) to skb->next.
955 * During transmission, we will remove the successfully transmitted
956 * fragments from this list. When the low-level driver rejects one
957 * of the fragments then we will simply pretend to accept the skb
958 * but store it away as pending.
959 */
252b86c4 960 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 961 return TX_DROP;
e6a9854b 962
2de8e0d9
JB		 963 /* update duration/seq/flags of fragments */
964 fragnum = 0;
252b86c4
JB		 965
966 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 967 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 968
2de8e0d9
JB		 969 hdr = (void *)skb->data;
970 info = IEEE80211_SKB_CB(skb);
e6a9854b 971
252b86c4 972 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 973 hdr->frame_control |= morefrags;
e6a9854b
JB		 974 /*
975 * No multi-rate retries for fragmented frames, that
976 * would completely throw off the NAV at other STAs.
977 */
978 info->control.rates[1].idx = -1;
979 info->control.rates[2].idx = -1;
980 info->control.rates[3].idx = -1;
e3e1a0bc 981 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 982 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 983 } else {
984 hdr->frame_control &= ~morefrags;
e6a9854b 985 }
2de8e0d9
JB		 986 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
987 fragnum++;
252b86c4 988 }
e2ebc74d 989
9ae54c84 990 return TX_CONTINUE;
e2ebc74d
JB		 991}
992
feff1f2f
JB		 993static ieee80211_tx_result debug_noinline
994ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
995{
252b86c4 996 struct sk_buff *skb;
560d2682 997 int ac = -1;
feff1f2f
JB		 998
999 if (!tx->sta)
1000 return TX_CONTINUE;
1001
252b86c4 1002 skb_queue_walk(&tx->skbs, skb) {
560d2682 1003 ac = skb_get_queue_mapping(skb);
e5a9f8d0 1004 tx->sta->tx_stats.bytes[ac] += skb->len;
252b86c4 1005 }
560d2682 1006 if (ac >= 0)
e5a9f8d0 1007 tx->sta->tx_stats.packets[ac]++;
feff1f2f
JB		 1008
1009 return TX_CONTINUE;
1010}
1011
d9e8a70f 1012static ieee80211_tx_result debug_noinline
e2454948
JB		 1013ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1014{
1015 if (!tx->key)
1016 return TX_CONTINUE;
1017
97359d12
JB		 1018 switch (tx->key->conf.cipher) {
1019 case WLAN_CIPHER_SUITE_WEP40:
1020 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1021 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1022 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1023 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1024 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 1025 return ieee80211_crypto_ccmp_encrypt(
1026 tx, IEEE80211_CCMP_MIC_LEN);
1027 case WLAN_CIPHER_SUITE_CCMP_256:
1028 return ieee80211_crypto_ccmp_encrypt(
1029 tx, IEEE80211_CCMP_256_MIC_LEN);
97359d12 1030 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1031 return ieee80211_crypto_aes_cmac_encrypt(tx);
56c52da2
JM		 1032 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1033 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
8ade538b
JM		 1034 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1035 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1036 return ieee80211_crypto_aes_gmac_encrypt(tx);
00b9cfa3
JM		 1037 case WLAN_CIPHER_SUITE_GCMP:
1038 case WLAN_CIPHER_SUITE_GCMP_256:
1039 return ieee80211_crypto_gcmp_encrypt(tx);
3ffc2a90 1040 default:
d32a1028 1041 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1042 }
1043
e2454948
JB		 1044 return TX_DROP;
1045}
1046
d9e8a70f 1047static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1048ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1049{
252b86c4 1050 struct sk_buff *skb;
2de8e0d9
JB		 1051 struct ieee80211_hdr *hdr;
1052 int next_len;
1053 bool group_addr;
03f93c3d 1054
252b86c4 1055 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1056 hdr = (void *) skb->data;
7e0aae47
JM		 1057 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1058 break; /* must not overwrite AID */
252b86c4
JB		 1059 if (!skb_queue_is_last(&tx->skbs, skb)) {
1060 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1061 next_len = next->len;
1062 } else
1063 next_len = 0;
2de8e0d9 1064 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1065
2de8e0d9 1066 hdr->duration_id =
252b86c4
JB		 1067 ieee80211_duration(tx, skb, group_addr, next_len);
1068 }
03f93c3d
JB		 1069
1070 return TX_CONTINUE;
1071}
1072
e2ebc74d
JB		 1073/* actual transmit path */
1074
a622ab72
JB		 1075static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1076 struct sk_buff *skb,
1077 struct ieee80211_tx_info *info,
1078 struct tid_ampdu_tx *tid_tx,
1079 int tid)
1080{
1081 bool queued = false;
285fa695 1082 bool reset_agg_timer = false;
aa454580 1083 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1084
1085 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1086 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1087 reset_agg_timer = true;
0ab33703
JB		 1088 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1089 /*
1090 * nothing -- this aggregation session is being started
1091 * but that might still fail with the driver
1092 */
ba8c3d6f 1093 } else if (!tx->sta->sta.txq[tid]) {
a622ab72
JB		 1094 spin_lock(&tx->sta->lock);
1095 /*
1096 * Need to re-check now, because we may get here
1097 *
1098 * 1) in the window during which the setup is actually
1099 * already done, but not marked yet because not all
1100 * packets are spliced over to the driver pending
1101 * queue yet -- if this happened we acquire the lock
1102 * either before or after the splice happens, but
1103 * need to recheck which of these cases happened.
1104 *
1105 * 2) during session teardown, if the OPERATIONAL bit
1106 * was cleared due to the teardown but the pointer
1107 * hasn't been assigned NULL yet (or we loaded it
1108 * before it was assigned) -- in this case it may
1109 * now be NULL which means we should just let the
1110 * packet pass through because splicing the frames
1111 * back is already done.
1112 */
40b275b6 1113 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1114
1115 if (!tid_tx) {
1116 /* do nothing, let packet pass through */
1117 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1118 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1119 reset_agg_timer = true;
a622ab72
JB		 1120 } else {
1121 queued = true;
f6d4671a
EG		 1122 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1123 clear_sta_flag(tx->sta, WLAN_STA_SP);
1124 ps_dbg(tx->sta->sdata,
1125 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1126 tx->sta->sta.addr, tx->sta->sta.aid);
1127 }
a622ab72
JB		 1128 info->control.vif = &tx->sdata->vif;
1129 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
facde7f3 1130 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
a622ab72 1131 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1132 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1133 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1134 }
1135 spin_unlock(&tx->sta->lock);
aa454580
HS		 1136
1137 if (purge_skb)
c3e7724b 1138 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1139 }
1140
285fa695 1141 /* reset session timer */
914eac24 1142 if (reset_agg_timer)
12d3952f 1143 tid_tx->last_tx = jiffies;
285fa695 1144
a622ab72
JB		 1145 return queued;
1146}
1147
58d4185e
JB		 1148/*
1149 * initialises @tx
7c10770f
JB		 1150 * pass %NULL for the station if unknown, a valid pointer if known
1151 * or an ERR_PTR() if the station is known not to exist
58d4185e 1152 */
9ae54c84 1153static ieee80211_tx_result
3b8d81e0
JB		 1154ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1155 struct ieee80211_tx_data *tx,
7c10770f 1156 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1157{
3b8d81e0 1158 struct ieee80211_local *local = sdata->local;
58d4185e 1159 struct ieee80211_hdr *hdr;
e039fa4a 1160 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1161 int tid;
e2ebc74d
JB		 1162
1163 memset(tx, 0, sizeof(*tx));
1164 tx->skb = skb;
e2ebc74d 1165 tx->local = local;
3b8d81e0 1166 tx->sdata = sdata;
252b86c4 1167 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1168
cd8ffc80
JB		 1169 /*
1170 * If this flag is set to true anywhere, and we get here,
1171 * we are doing the needed processing, so remove the flag
1172 * now.
1173 */
1174 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1175
58d4185e
JB		 1176 hdr = (struct ieee80211_hdr *) skb->data;
1177
7c10770f
JB		 1178 if (likely(sta)) {
1179 if (!IS_ERR(sta))
1180 tx->sta = sta;
1181 } else {
1182 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1183 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1184 if (!tx->sta && sdata->wdev.use_4addr)
1185 return TX_DROP;
1186 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1187 IEEE80211_TX_CTL_INJECTED) ||
1188 tx->sdata->control_port_protocol == tx->skb->protocol) {
1189 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1190 }
1191 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1192 tx->sta = sta_info_get(sdata, hdr->addr1);
3f0e0b22 1193 }
58d4185e 1194
cd8ffc80 1195 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1196 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1197 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1198 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1199 struct tid_ampdu_tx *tid_tx;
1200
a1f2ba04 1201 tid = ieee80211_get_tid(hdr);
8b30b1fe 1202
a622ab72
JB		 1203 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1204 if (tid_tx) {
1205 bool queued;
cd8ffc80 1206
a622ab72
JB		 1207 queued = ieee80211_tx_prep_agg(tx, skb, info,
1208 tid_tx, tid);
1209
1210 if (unlikely(queued))
1211 return TX_QUEUED;
1212 }
8b30b1fe
S		 1213 }
1214
badffb72 1215 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1216 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1217 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1218 } else
5cf121c3 1219 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1220
a26eb27a
JB		 1221 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1222 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1223 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1224 info->flags & IEEE80211_TX_CTL_AMPDU)
1225 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1226 }
1227
e2ebc74d 1228 if (!tx->sta)
e039fa4a 1229 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1230 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1231 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1232 ieee80211_check_fast_xmit(tx->sta);
1233 }
58d4185e 1234
e039fa4a 1235 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1236
9ae54c84 1237 return TX_CONTINUE;
e2ebc74d
JB		 1238}
1239
80a83cfc
MK		 1240static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1241 struct ieee80211_vif *vif,
dbef5362 1242 struct sta_info *sta,
80a83cfc 1243 struct sk_buff *skb)
ba8c3d6f
FF		 1244{
1245 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ba8c3d6f 1246 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ba8c3d6f 1247 struct ieee80211_txq *txq = NULL;
ba8c3d6f 1248
c3732a7b
FF		 1249 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1250 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
80a83cfc 1251 return NULL;
ba8c3d6f 1252
adf8ed01
JB		 1253 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1254 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
0eeb2b67
SS		 1255 ieee80211_is_bufferable_mmpdu(hdr->frame_control) ||
1256 vif->type == NL80211_IFTYPE_STATION) &&
adf8ed01
JB		 1257 sta && sta->uploaded) {
1258 /*
1259 * This will be NULL if the driver didn't set the
1260 * opt-in hardware flag.
1261 */
1262 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1263 }
1264 } else if (sta) {
ba8c3d6f
FF		 1265 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1266
dbef5362
MK		 1267 if (!sta->uploaded)
1268 return NULL;
1269
1270 txq = sta->sta.txq[tid];
ba8c3d6f
FF		 1271 } else if (vif) {
1272 txq = vif->txq;
1273 }
1274
1275 if (!txq)
80a83cfc 1276 return NULL;
ba8c3d6f 1277
80a83cfc
MK		 1278 return to_txq_info(txq);
1279}
ba8c3d6f 1280
5caa328e
MK		 1281static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1282{
1283 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1284}
1285
5caa328e
MK		 1286static u32 codel_skb_len_func(const struct sk_buff *skb)
1287{
1288 return skb->len;
1289}
1290
1291static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1292{
1293 const struct ieee80211_tx_info *info;
1294
1295 info = (const struct ieee80211_tx_info *)skb->cb;
1296 return info->control.enqueue_time;
1297}
1298
1299static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1300 void *ctx)
1301{
1302 struct ieee80211_local *local;
1303 struct txq_info *txqi;
1304 struct fq *fq;
1305 struct fq_flow *flow;
1306
1307 txqi = ctx;
1308 local = vif_to_sdata(txqi->txq.vif)->local;
1309 fq = &local->fq;
1310
1311 if (cvars == &txqi->def_cvars)
1312 flow = &txqi->def_flow;
1313 else
1314 flow = &fq->flows[cvars - local->cvars];
1315
1316 return fq_flow_dequeue(fq, flow);
1317}
1318
1319static void codel_drop_func(struct sk_buff *skb,
1320 void *ctx)
1321{
1322 struct ieee80211_local *local;
1323 struct ieee80211_hw *hw;
1324 struct txq_info *txqi;
1325
1326 txqi = ctx;
1327 local = vif_to_sdata(txqi->txq.vif)->local;
1328 hw = &local->hw;
1329
1330 ieee80211_free_txskb(hw, skb);
1331}
1332
fa962b92
MK		 1333static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1334 struct fq_tin *tin,
1335 struct fq_flow *flow)
1336{
5caa328e
MK		 1337 struct ieee80211_local *local;
1338 struct txq_info *txqi;
1339 struct codel_vars *cvars;
1340 struct codel_params *cparams;
1341 struct codel_stats *cstats;
1342
1343 local = container_of(fq, struct ieee80211_local, fq);
1344 txqi = container_of(tin, struct txq_info, tin);
8d51dbb8 1345 cstats = &txqi->cstats;
5caa328e 1346
484a54c2
THJ		 1347 if (txqi->txq.sta) {
1348 struct sta_info *sta = container_of(txqi->txq.sta,
1349 struct sta_info, sta);
1350 cparams = &sta->cparams;
1351 } else {
1352 cparams = &local->cparams;
1353 }
1354
5caa328e
MK		 1355 if (flow == &txqi->def_flow)
1356 cvars = &txqi->def_cvars;
1357 else
1358 cvars = &local->cvars[flow - fq->flows];
1359
1360 return codel_dequeue(txqi,
1361 &flow->backlog,
1362 cparams,
1363 cvars,
1364 cstats,
1365 codel_skb_len_func,
1366 codel_skb_time_func,
1367 codel_drop_func,
1368 codel_dequeue_func);
fa962b92
MK		 1369}
1370
1371static void fq_skb_free_func(struct fq *fq,
1372 struct fq_tin *tin,
1373 struct fq_flow *flow,
1374 struct sk_buff *skb)
1375{
1376 struct ieee80211_local *local;
1377
1378 local = container_of(fq, struct ieee80211_local, fq);
1379 ieee80211_free_txskb(&local->hw, skb);
1380}
1381
1382static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1383 struct fq_tin *tin,
1384 int idx,
1385 struct sk_buff *skb)
1386{
1387 struct txq_info *txqi;
1388
1389 txqi = container_of(tin, struct txq_info, tin);
1390 return &txqi->def_flow;
1391}
1392
80a83cfc
MK		 1393static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1394 struct txq_info *txqi,
1395 struct sk_buff *skb)
1396{
fa962b92
MK		 1397 struct fq *fq = &local->fq;
1398 struct fq_tin *tin = &txqi->tin;
f2af2df8 1399 u32 flow_idx = fq_flow_idx(fq, skb);
f2ac7e30 1400
5caa328e 1401 ieee80211_set_skb_enqueue_time(skb);
f2af2df8
FF		 1402
1403 spin_lock_bh(&fq->lock);
1404 fq_tin_enqueue(fq, tin, flow_idx, skb,
fa962b92
MK		 1405 fq_skb_free_func,
1406 fq_flow_get_default_func);
f2af2df8 1407 spin_unlock_bh(&fq->lock);
fa962b92 1408}
ba8c3d6f 1409
2a9e2579
JB		 1410static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1411 struct fq_flow *flow, struct sk_buff *skb,
1412 void *data)
1413{
1414 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1415
1416 return info->control.vif == data;
1417}
1418
1419void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1420 struct ieee80211_sub_if_data *sdata)
1421{
1422 struct fq *fq = &local->fq;
1423 struct txq_info *txqi;
1424 struct fq_tin *tin;
1425 struct ieee80211_sub_if_data *ap;
1426
1427 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1428 return;
1429
1430 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1431
1432 if (!ap->vif.txq)
1433 return;
1434
1435 txqi = to_txq_info(ap->vif.txq);
1436 tin = &txqi->tin;
1437
1438 spin_lock_bh(&fq->lock);
1439 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1440 fq_skb_free_func);
1441 spin_unlock_bh(&fq->lock);
1442}
1443
fa962b92
MK		 1444void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1445 struct sta_info *sta,
1446 struct txq_info *txqi, int tid)
1447{
1448 fq_tin_init(&txqi->tin);
1449 fq_flow_init(&txqi->def_flow);
5caa328e 1450 codel_vars_init(&txqi->def_cvars);
8d51dbb8 1451 codel_stats_init(&txqi->cstats);
bb42f2d1 1452 __skb_queue_head_init(&txqi->frags);
18667600 1453 INIT_LIST_HEAD(&txqi->schedule_order);
fa962b92
MK		 1454
1455 txqi->txq.vif = &sdata->vif;
1456
adf8ed01 1457 if (!sta) {
fa962b92
MK		 1458 sdata->vif.txq = &txqi->txq;
1459 txqi->txq.tid = 0;
1460 txqi->txq.ac = IEEE80211_AC_BE;
adf8ed01
JB		 1461
1462 return;
80a83cfc 1463 }
adf8ed01
JB		 1464
1465 if (tid == IEEE80211_NUM_TIDS) {
0eeb2b67
SS		 1466 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1467 /* Drivers need to opt in to the management MPDU TXQ */
1468 if (!ieee80211_hw_check(&sdata->local->hw,
1469 STA_MMPDU_TXQ))
1470 return;
1471 } else if (!ieee80211_hw_check(&sdata->local->hw,
1472 BUFF_MMPDU_TXQ)) {
1473 /* Drivers need to opt in to the bufferable MMPDU TXQ */
adf8ed01 1474 return;
0eeb2b67 1475 }
adf8ed01
JB		 1476 txqi->txq.ac = IEEE80211_AC_VO;
1477 } else {
1478 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1479 }
1480
1481 txqi->txq.sta = &sta->sta;
1482 txqi->txq.tid = tid;
1483 sta->sta.txq[tid] = &txqi->txq;
fa962b92 1484}
ba8c3d6f 1485
fa962b92
MK		 1486void ieee80211_txq_purge(struct ieee80211_local *local,
1487 struct txq_info *txqi)
1488{
1489 struct fq *fq = &local->fq;
1490 struct fq_tin *tin = &txqi->tin;
1491
b4809e94 1492 spin_lock_bh(&fq->lock);
fa962b92 1493 fq_tin_reset(fq, tin, fq_skb_free_func);
bb42f2d1 1494 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
b4809e94
THJ		 1495 spin_unlock_bh(&fq->lock);
1496
18667600
THJ		 1497 spin_lock_bh(&local->active_txq_lock[txqi->txq.ac]);
1498 list_del_init(&txqi->schedule_order);
1499 spin_unlock_bh(&local->active_txq_lock[txqi->txq.ac]);
fa962b92
MK		 1500}
1501
2fe4a29a
THJ		 1502void ieee80211_txq_set_params(struct ieee80211_local *local)
1503{
1504 if (local->hw.wiphy->txq_limit)
1505 local->fq.limit = local->hw.wiphy->txq_limit;
1506 else
1507 local->hw.wiphy->txq_limit = local->fq.limit;
1508
1509 if (local->hw.wiphy->txq_memory_limit)
1510 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1511 else
1512 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1513
1514 if (local->hw.wiphy->txq_quantum)
1515 local->fq.quantum = local->hw.wiphy->txq_quantum;
1516 else
1517 local->hw.wiphy->txq_quantum = local->fq.quantum;
1518}
1519
fa962b92
MK		 1520int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1521{
1522 struct fq *fq = &local->fq;
1523 int ret;
5caa328e 1524 int i;
3ff23cd5
THJ		 1525 bool supp_vht = false;
1526 enum nl80211_band band;
fa962b92
MK		 1527
1528 if (!local->ops->wake_tx_queue)
1529 return 0;
1530
1531 ret = fq_init(fq, 4096);
1532 if (ret)
1533 return ret;
1534
3ff23cd5
THJ		 1535 /*
1536 * If the hardware doesn't support VHT, it is safe to limit the maximum
1537 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1538 */
1539 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1540 struct ieee80211_supported_band *sband;
1541
1542 sband = local->hw.wiphy->bands[band];
1543 if (!sband)
1544 continue;
1545
1546 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1547 }
1548
1549 if (!supp_vht)
1550 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1551
5caa328e 1552 codel_params_init(&local->cparams);
5caa328e
MK		 1553 local->cparams.interval = MS2TIME(100);
1554 local->cparams.target = MS2TIME(20);
1555 local->cparams.ecn = true;
1556
1557 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1558 GFP_KERNEL);
1559 if (!local->cvars) {
59a7c828 1560 spin_lock_bh(&fq->lock);
5caa328e 1561 fq_reset(fq, fq_skb_free_func);
59a7c828 1562 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1563 return -ENOMEM;
1564 }
1565
1566 for (i = 0; i < fq->flows_cnt; i++)
1567 codel_vars_init(&local->cvars[i]);
1568
2fe4a29a
THJ		 1569 ieee80211_txq_set_params(local);
1570
fa962b92
MK		 1571 return 0;
1572}
1573
1574void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1575{
1576 struct fq *fq = &local->fq;
1577
1578 if (!local->ops->wake_tx_queue)
1579 return;
1580
5caa328e
MK		 1581 kfree(local->cvars);
1582 local->cvars = NULL;
1583
59a7c828 1584 spin_lock_bh(&fq->lock);
fa962b92 1585 fq_reset(fq, fq_skb_free_func);
59a7c828 1586 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1587}
1588
bb42f2d1
THJ		 1589static bool ieee80211_queue_skb(struct ieee80211_local *local,
1590 struct ieee80211_sub_if_data *sdata,
1591 struct sta_info *sta,
1592 struct sk_buff *skb)
1593{
bb42f2d1
THJ		 1594 struct ieee80211_vif *vif;
1595 struct txq_info *txqi;
bb42f2d1
THJ		 1596
1597 if (!local->ops->wake_tx_queue ||
1598 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1599 return false;
1600
bb42f2d1
THJ		 1601 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1602 sdata = container_of(sdata->bss,
1603 struct ieee80211_sub_if_data, u.ap);
1604
1605 vif = &sdata->vif;
dbef5362 1606 txqi = ieee80211_get_txq(local, vif, sta, skb);
bb42f2d1
THJ		 1607
1608 if (!txqi)
1609 return false;
1610
bb42f2d1 1611 ieee80211_txq_enqueue(local, txqi, skb);
bb42f2d1 1612
18667600 1613 schedule_and_wake_txq(local, txqi);
bb42f2d1
THJ		 1614
1615 return true;
1616}
1617
11127e91
JB		 1618static bool ieee80211_tx_frags(struct ieee80211_local *local,
1619 struct ieee80211_vif *vif,
4fd0328d 1620 struct sta_info *sta,
11127e91
JB		 1621 struct sk_buff_head *skbs,
1622 bool txpending)
e2ebc74d 1623{
80a83cfc 1624 struct ieee80211_tx_control control = {};
252b86c4 1625 struct sk_buff *skb, *tmp;
3b8d81e0 1626 unsigned long flags;
e2ebc74d 1627
252b86c4 1628 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1629 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1630 int q = info->hw_queue;
1631
1632#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1633 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1634 __skb_unlink(skb, skbs);
c3e7724b 1635 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1636 continue;
1637 }
1638#endif
3b8d81e0
JB		 1639
1640 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1641 if (local->queue_stop_reasons[q] ||
7bb45683 1642 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1643 if (unlikely(info->flags &
a7679ed5
SF		 1644 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1645 if (local->queue_stop_reasons[q] &
1646 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1647 /*
1648 * Drop off-channel frames if queues
1649 * are stopped for any reason other
1650 * than off-channel operation. Never
1651 * queue them.
1652 */
1653 spin_unlock_irqrestore(
1654 &local->queue_stop_reason_lock,
1655 flags);
1656 ieee80211_purge_tx_queue(&local->hw,
1657 skbs);
1658 return true;
1659 }
1660 } else {
1661
6c17b77b 1662 /*
a7679ed5
SF		 1663 * Since queue is stopped, queue up frames for
1664 * later transmission from the tx-pending
1665 * tasklet when the queue is woken again.
6c17b77b 1666 */
a7679ed5
SF		 1667 if (txpending)
1668 skb_queue_splice_init(skbs,
1669 &local->pending[q]);
1670 else
1671 skb_queue_splice_tail_init(skbs,
1672 &local->pending[q]);
1673
1674 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1675 flags);
1676 return false;
6c17b77b 1677 }
7bb45683 1678 }
3b8d81e0 1679 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1680
11127e91 1681 info->control.vif = vif;
4fd0328d 1682 control.sta = sta ? &sta->sta : NULL;
f0e72851 1683
11127e91 1684 __skb_unlink(skb, skbs);
80a83cfc 1685 drv_tx(local, &control, skb);
11127e91 1686 }
5061b0c2 1687
11127e91
JB		 1688 return true;
1689}
1690
1691/*
1692 * Returns false if the frame couldn't be transmitted but was queued instead.
1693 */
1694static bool __ieee80211_tx(struct ieee80211_local *local,
1695 struct sk_buff_head *skbs, int led_len,
1696 struct sta_info *sta, bool txpending)
1697{
1698 struct ieee80211_tx_info *info;
1699 struct ieee80211_sub_if_data *sdata;
1700 struct ieee80211_vif *vif;
11127e91
JB		 1701 struct sk_buff *skb;
1702 bool result = true;
1703 __le16 fc;
5061b0c2 1704
11127e91
JB		 1705 if (WARN_ON(skb_queue_empty(skbs)))
1706 return true;
ec25acc4 1707
11127e91
JB		 1708 skb = skb_peek(skbs);
1709 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1710 info = IEEE80211_SKB_CB(skb);
1711 sdata = vif_to_sdata(info->control.vif);
1712 if (sta && !sta->uploaded)
1713 sta = NULL;
1714
11127e91
JB		 1715 switch (sdata->vif.type) {
1716 case NL80211_IFTYPE_MONITOR:
d8212184 1717 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
c82b5a74
JB		 1718 vif = &sdata->vif;
1719 break;
1720 }
4b6f1dd6 1721 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1722 if (sdata) {
4b6f1dd6 1723 vif = &sdata->vif;
3a25a8c8
JB		 1724 info->hw_queue =
1725 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1726 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1727 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1728 return true;
1729 } else
4b6f1dd6 1730 vif = NULL;
11127e91
JB		 1731 break;
1732 case NL80211_IFTYPE_AP_VLAN:
1733 sdata = container_of(sdata->bss,
1734 struct ieee80211_sub_if_data, u.ap);
1735 /* fall through */
1736 default:
1737 vif = &sdata->vif;
1738 break;
e2ebc74d 1739 }
2de8e0d9 1740
4fd0328d 1741 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
11127e91 1742
74e4dbfd 1743 ieee80211_tpt_led_trig_tx(local, fc, led_len);
74e4dbfd 1744
4db4e0a1 1745 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1746
11127e91 1747 return result;
e2ebc74d
JB		 1748}
1749
97b045d6
JB		 1750/*
1751 * Invoke TX handlers, return 0 on success and non-zero if the
1752 * frame was dropped or queued.
bb42f2d1
THJ		 1753 *
1754 * The handlers are split into an early and late part. The latter is everything
1755 * that can be sensitive to reordering, and will be deferred to after packets
1756 * are dequeued from the intermediate queues (when they are enabled).
97b045d6 1757 */
bb42f2d1 1758static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
97b045d6 1759{
97b045d6 1760 ieee80211_tx_result res = TX_DROP;
97b045d6 1761
9aa4aee3
JB		 1762#define CALL_TXH(txh) \
1763 do { \
1764 res = txh(tx); \
1765 if (res != TX_CONTINUE) \
1766 goto txh_done; \
1767 } while (0)
1768
5c1b98a5 1769 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1770 CALL_TXH(ieee80211_tx_h_check_assoc);
1771 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1772 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1773 CALL_TXH(ieee80211_tx_h_select_key);
30686bf7 1774 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
af65cd96 1775 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1776
bb42f2d1
THJ		 1777 txh_done:
1778 if (unlikely(res == TX_DROP)) {
1779 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1780 if (tx->skb)
1781 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1782 else
1783 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1784 return -1;
1785 } else if (unlikely(res == TX_QUEUED)) {
1786 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1787 return -1;
1788 }
1789
1790 return 0;
1791}
1792
1793/*
1794 * Late handlers can be called while the sta lock is held. Handlers that can
1795 * cause packets to be generated will cause deadlock!
1796 */
1797static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1798{
1799 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1800 ieee80211_tx_result res = TX_CONTINUE;
1801
aa5b5492
JB		 1802 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1803 __skb_queue_tail(&tx->skbs, tx->skb);
1804 tx->skb = NULL;
c6fcf6bc 1805 goto txh_done;
aa5b5492 1806 }
c6fcf6bc
JB		 1807
1808 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1809 CALL_TXH(ieee80211_tx_h_sequence);
1810 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1811 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1812 CALL_TXH(ieee80211_tx_h_stats);
1813 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1814 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1815 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1816#undef CALL_TXH
97b045d6 1817
d9e8a70f 1818 txh_done:
97b045d6 1819 if (unlikely(res == TX_DROP)) {
5479d0e7 1820 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1821 if (tx->skb)
c3e7724b 1822 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1823 else
1f98ab7f 1824 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1825 return -1;
1826 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1827 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1828 return -1;
1829 }
1830
1831 return 0;
1832}
1833
bb42f2d1
THJ		 1834static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1835{
1836 int r = invoke_tx_handlers_early(tx);
1837
1838 if (r)
1839 return r;
1840 return invoke_tx_handlers_late(tx);
1841}
1842
06be6b14
FF		 1843bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1844 struct ieee80211_vif *vif, struct sk_buff *skb,
1845 int band, struct ieee80211_sta **sta)
1846{
1847 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1848 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1849 struct ieee80211_tx_data tx;
88724a81 1850 struct sk_buff *skb2;
06be6b14 1851
7c10770f 1852 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1853 return false;
1854
1855 info->band = band;
1856 info->control.vif = vif;
1857 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1858
1859 if (invoke_tx_handlers(&tx))
1860 return false;
1861
1862 if (sta) {
1863 if (tx.sta)
1864 *sta = &tx.sta->sta;
1865 else
1866 *sta = NULL;
1867 }
1868
88724a81
JB		 1869 /* this function isn't suitable for fragmented data frames */
1870 skb2 = __skb_dequeue(&tx.skbs);
1871 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1872 ieee80211_free_txskb(hw, skb2);
1873 ieee80211_purge_tx_queue(hw, &tx.skbs);
1874 return false;
1875 }
1876
06be6b14
FF		 1877 return true;
1878}
1879EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1880
7bb45683
JB		 1881/*
1882 * Returns false if the frame couldn't be transmitted but was queued instead.
1883 */
1884static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f 1885 struct sta_info *sta, struct sk_buff *skb,
b9771d41 1886 bool txpending, u32 txdata_flags)
e2ebc74d 1887{
3b8d81e0 1888 struct ieee80211_local *local = sdata->local;
5cf121c3 1889 struct ieee80211_tx_data tx;
97b045d6 1890 ieee80211_tx_result res_prepare;
e039fa4a 1891 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1892 bool result = true;
74e4dbfd 1893 int led_len;
e2ebc74d 1894
e2ebc74d
JB		 1895 if (unlikely(skb->len < 10)) {
1896 dev_kfree_skb(skb);
7bb45683 1897 return true;
e2ebc74d
JB		 1898 }
1899
58d4185e 1900 /* initialises tx */
74e4dbfd 1901 led_len = skb->len;
7c10770f 1902 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1903
b9771d41
JB		 1904 tx.flags |= txdata_flags;
1905
cd8ffc80 1906 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1907 ieee80211_free_txskb(&local->hw, skb);
55de908a 1908 return true;
cd8ffc80 1909 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1910 return true;
e2ebc74d
JB		 1911 }
1912
3a25a8c8
JB		 1913 /* set up hw_queue value early */
1914 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1915 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1916 info->hw_queue =
1917 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1918
bb42f2d1 1919 if (invoke_tx_handlers_early(&tx))
6eae4a6c 1920 return true;
bb42f2d1
THJ		 1921
1922 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1923 return true;
1924
1925 if (!invoke_tx_handlers_late(&tx))
74e4dbfd
JB		 1926 result = __ieee80211_tx(local, &tx.skbs, led_len,
1927 tx.sta, txpending);
55de908a 1928
7bb45683 1929 return result;
e2ebc74d
JB		 1930}
1931
1932/* device xmit handlers */
1933
3bff1865 1934static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1935 struct sk_buff *skb,
1936 int head_need, bool may_encrypt)
1937{
3bff1865 1938 struct ieee80211_local *local = sdata->local;
9d0f50b8
FF		 1939 struct ieee80211_hdr *hdr;
1940 bool enc_tailroom;
23c0752a
JB		 1941 int tail_need = 0;
1942
9d0f50b8
FF		 1943 hdr = (struct ieee80211_hdr *) skb->data;
1944 enc_tailroom = may_encrypt &&
1945 (sdata->crypto_tx_tailroom_needed_cnt ||
1946 ieee80211_is_mgmt(hdr->frame_control));
1947
1948 if (enc_tailroom) {
23c0752a
JB		 1949 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1950 tail_need -= skb_tailroom(skb);
1951 tail_need = max_t(int, tail_need, 0);
1952 }
1953
c70f59a2 1954 if (skb_cloned(skb) &&
30686bf7 1955 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
9d0f50b8 1956 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
23c0752a 1957 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1958 else if (head_need || tail_need)
23c0752a 1959 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1960 else
1961 return 0;
23c0752a
JB		 1962
1963 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1964 wiphy_debug(local->hw.wiphy,
1965 "failed to reallocate TX buffer\n");
23c0752a
JB		 1966 return -ENOMEM;
1967 }
1968
23c0752a
JB		 1969 return 0;
1970}
1971
7c10770f 1972void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
b9771d41
JB		 1973 struct sta_info *sta, struct sk_buff *skb,
1974 u32 txdata_flags)
e2ebc74d 1975{
3b8d81e0 1976 struct ieee80211_local *local = sdata->local;
e039fa4a 1977 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
11b05ba3 1978 struct ieee80211_hdr *hdr;
e2ebc74d 1979 int headroom;
23c0752a 1980 bool may_encrypt;
e2ebc74d 1981
3b8d81e0 1982 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1983
3b8d81e0 1984 headroom = local->tx_headroom;
23c0752a 1985 if (may_encrypt)
2475b1cc 1986 headroom += sdata->encrypt_headroom;
23c0752a
JB		 1987 headroom -= skb_headroom(skb);
1988 headroom = max_t(int, 0, headroom);
1989
3bff1865 1990 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1991 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1992 return;
e2ebc74d
JB		 1993 }
1994
740c1aa3 1995 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1996 info->control.vif = &sdata->vif;
e2ebc74d 1997
3f52b7e3
MP		 1998 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1999 if (ieee80211_is_data(hdr->frame_control) &&
2000 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 2001 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 2002 return; /* skb queued: don't free */
2003 } else {
2004 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2005 }
98aed9fd 2006 }
cca89496 2007
2154c81c 2008 ieee80211_set_qos_hdr(sdata, skb);
b9771d41 2009 ieee80211_tx(sdata, sta, skb, false, txdata_flags);
e2ebc74d
JB		 2010}
2011
dfdfc2be
SE		 2012static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
2013 struct sk_buff *skb)
73b9f03a
JB		 2014{
2015 struct ieee80211_radiotap_iterator iterator;
2016 struct ieee80211_radiotap_header *rthdr =
2017 (struct ieee80211_radiotap_header *) skb->data;
2018 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
dfdfc2be
SE		 2019 struct ieee80211_supported_band *sband =
2020 local->hw.wiphy->bands[info->band];
73b9f03a
JB		 2021 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2022 NULL);
2023 u16 txflags;
dfdfc2be
SE		 2024 u16 rate = 0;
2025 bool rate_found = false;
2026 u8 rate_retries = 0;
2027 u16 rate_flags = 0;
f66b60f6 2028 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 2029 u16 vht_known;
2030 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 2031 int i;
73b9f03a
JB		 2032
2033 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2034 IEEE80211_TX_CTL_DONTFRAG;
2035
2036 /*
2037 * for every radiotap entry that is present
2038 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2039 * entries present, or -EINVAL on error)
2040 */
2041
2042 while (!ret) {
2043 ret = ieee80211_radiotap_iterator_next(&iterator);
2044
2045 if (ret)
2046 continue;
2047
2048 /* see if this argument is something we can use */
2049 switch (iterator.this_arg_index) {
2050 /*
2051 * You must take care when dereferencing iterator.this_arg
2052 * for multibyte types... the pointer is not aligned. Use
2053 * get_unaligned((type *)iterator.this_arg) to dereference
2054 * iterator.this_arg for type "type" safely on all arches.
2055 */
2056 case IEEE80211_RADIOTAP_FLAGS:
2057 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2058 /*
2059 * this indicates that the skb we have been
2060 * handed has the 32-bit FCS CRC at the end...
2061 * we should react to that by snipping it off
2062 * because it will be recomputed and added
2063 * on transmission
2064 */
2065 if (skb->len < (iterator._max_length + FCS_LEN))
2066 return false;
2067
2068 skb_trim(skb, skb->len - FCS_LEN);
2069 }
2070 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2071 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2072 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2073 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2074 break;
2075
2076 case IEEE80211_RADIOTAP_TX_FLAGS:
2077 txflags = get_unaligned_le16(iterator.this_arg);
2078 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2079 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2080 break;
2081
dfdfc2be
SE		 2082 case IEEE80211_RADIOTAP_RATE:
2083 rate = *iterator.this_arg;
2084 rate_flags = 0;
2085 rate_found = true;
2086 break;
2087
2088 case IEEE80211_RADIOTAP_DATA_RETRIES:
2089 rate_retries = *iterator.this_arg;
2090 break;
2091
2092 case IEEE80211_RADIOTAP_MCS:
2093 mcs_known = iterator.this_arg[0];
2094 mcs_flags = iterator.this_arg[1];
2095 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2096 break;
2097
2098 rate_found = true;
2099 rate = iterator.this_arg[2];
2100 rate_flags = IEEE80211_TX_RC_MCS;
2101
2102 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2103 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2104 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2105
f66b60f6 2106 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 2107 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 2108 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be
SE		 2109 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2110 break;
2111
646e76bb
LB		 2112 case IEEE80211_RADIOTAP_VHT:
2113 vht_known = get_unaligned_le16(iterator.this_arg);
2114 rate_found = true;
2115
2116 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2117 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2118 (iterator.this_arg[2] &
2119 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2120 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2121 if (vht_known &
2122 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2123 if (iterator.this_arg[3] == 1)
2124 rate_flags |=
2125 IEEE80211_TX_RC_40_MHZ_WIDTH;
2126 else if (iterator.this_arg[3] == 4)
2127 rate_flags |=
2128 IEEE80211_TX_RC_80_MHZ_WIDTH;
2129 else if (iterator.this_arg[3] == 11)
2130 rate_flags |=
2131 IEEE80211_TX_RC_160_MHZ_WIDTH;
2132 }
2133
2134 vht_mcs = iterator.this_arg[4] >> 4;
2135 vht_nss = iterator.this_arg[4] & 0xF;
2136 break;
2137
73b9f03a
JB		 2138 /*
2139 * Please update the file
2140 * Documentation/networking/mac80211-injection.txt
2141 * when parsing new fields here.
2142 */
2143
2144 default:
2145 break;
2146 }
2147 }
2148
2149 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2150 return false;
2151
dfdfc2be
SE		 2152 if (rate_found) {
2153 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2154
2155 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2156 info->control.rates[i].idx = -1;
2157 info->control.rates[i].flags = 0;
2158 info->control.rates[i].count = 0;
2159 }
2160
2161 if (rate_flags & IEEE80211_TX_RC_MCS) {
2162 info->control.rates[0].idx = rate;
646e76bb
LB		 2163 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2164 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2165 vht_nss);
dfdfc2be
SE		 2166 } else {
2167 for (i = 0; i < sband->n_bitrates; i++) {
2168 if (rate * 5 != sband->bitrates[i].bitrate)
2169 continue;
2170
2171 info->control.rates[0].idx = i;
2172 break;
2173 }
2174 }
2175
07310a63
FF		 2176 if (info->control.rates[0].idx < 0)
2177 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2178
dfdfc2be
SE		 2179 info->control.rates[0].flags = rate_flags;
2180 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2181 local->hw.max_rate_tries);
2182 }
2183
73b9f03a
JB		 2184 /*
2185 * remove the radiotap header
2186 * iterator->_max_length was sanity-checked against
2187 * skb->len by iterator init
2188 */
2189 skb_pull(skb, iterator._max_length);
2190
2191 return true;
2192}
2193
d0cf9c0d
SH		 2194netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2195 struct net_device *dev)
e2ebc74d
JB		 2196{
2197 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2198 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d
JB		 2199 struct ieee80211_radiotap_header *prthdr =
2200 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 2201 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2202 struct ieee80211_hdr *hdr;
5d9cf4a5 2203 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2204 struct cfg80211_chan_def *chandef;
9b8a74e3 2205 u16 len_rthdr;
5d9cf4a5 2206 int hdrlen;
e2ebc74d 2207
9b8a74e3
AG		 2208 /* check for not even having the fixed radiotap header part */
2209 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2210 goto fail; /* too short to be possibly valid */
2211
2212 /* is it a header version we can trust to find length from? */
2213 if (unlikely(prthdr->it_version))
2214 goto fail; /* only version 0 is supported */
2215
2216 /* then there must be a radiotap header with a length we can use */
2217 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2218
2219 /* does the skb contain enough to deliver on the alleged length? */
2220 if (unlikely(skb->len < len_rthdr))
2221 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 2222
e2ebc74d
JB		 2223 /*
2224 * fix up the pointers accounting for the radiotap
2225 * header still being in there. We are being given
2226 * a precooked IEEE80211 header so no need for
2227 * normal processing
2228 */
9b8a74e3 2229 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2230 /*
9b8a74e3
AG		 2231 * these are just fixed to the end of the rt area since we
2232 * don't have any better information and at this point, nobody cares
e2ebc74d 2233 */
9b8a74e3
AG		 2234 skb_set_network_header(skb, len_rthdr);
2235 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2236
5d9cf4a5
JB		 2237 if (skb->len < len_rthdr + 2)
2238 goto fail;
2239
2240 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2241 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2242
2243 if (skb->len < len_rthdr + hdrlen)
2244 goto fail;
2245
f75f5c6f
HS		 2246 /*
2247 * Initialize skb->protocol if the injected frame is a data frame
2248 * carrying a rfc1042 header
2249 */
5d9cf4a5
JB		 2250 if (ieee80211_is_data(hdr->frame_control) &&
2251 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2252 u8 *payload = (u8 *)hdr + hdrlen;
2253
b203ca39 2254 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2255 skb->protocol = cpu_to_be16((payload[6] << 8) |
2256 payload[7]);
f75f5c6f
HS		 2257 }
2258
3b8d81e0
JB		 2259 memset(info, 0, sizeof(*info));
2260
5d9cf4a5 2261 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 2262 IEEE80211_TX_CTL_INJECTED;
2263
5d9cf4a5
JB		 2264 rcu_read_lock();
2265
2266 /*
2267 * We process outgoing injected frames that have a local address
2268 * we handle as though they are non-injected frames.
2269 * This code here isn't entirely correct, the local MAC address
2270 * isn't always enough to find the interface to use; for proper
2271 * VLAN/WDS support we will need a different mechanism (which
2272 * likely isn't going to be monitor interfaces).
b226a826
JB		 2273 *
2274 * This is necessary, for example, for old hostapd versions that
2275 * don't use nl80211-based management TX/RX.
5d9cf4a5
JB		 2276 */
2277 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2278
2279 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2280 if (!ieee80211_sdata_running(tmp_sdata))
2281 continue;
2282 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2283 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2284 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2285 continue;
b203ca39 2286 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2287 sdata = tmp_sdata;
2288 break;
2289 }
2290 }
7351c6bd 2291
55de908a
JB		 2292 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2293 if (!chanctx_conf) {
2294 tmp_sdata = rcu_dereference(local->monitor_sdata);
2295 if (tmp_sdata)
2296 chanctx_conf =
2297 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2298 }
55de908a 2299
b4a7ff75 2300 if (chanctx_conf)
b4932836 2301 chandef = &chanctx_conf->def;
b4a7ff75 2302 else if (!local->use_chanctx)
b4932836 2303 chandef = &local->_oper_chandef;
b4a7ff75
FF		 2304 else
2305 goto fail_rcu;
55de908a
JB		 2306
2307 /*
2308 * Frame injection is not allowed if beaconing is not allowed
2309 * or if we need radar detection. Beaconing is usually not allowed when
2310 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2311 * Passive scan is also used in world regulatory domains where
2312 * your country is not known and as such it should be treated as
2313 * NO TX unless the channel is explicitly allowed in which case
2314 * your current regulatory domain would not have the passive scan
2315 * flag.
2316 *
2317 * Since AP mode uses monitor interfaces to inject/TX management
2318 * frames we can make AP mode the exception to this rule once it
2319 * supports radar detection as its implementation can deal with
2320 * radar detection by itself. We can do that later by adding a
2321 * monitor flag interfaces used for AP support.
2322 */
b4932836
JD		 2323 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2324 sdata->vif.type))
55de908a
JB		 2325 goto fail_rcu;
2326
73c4e195 2327 info->band = chandef->chan->band;
109843b0
LB		 2328
2329 /* process and remove the injection radiotap header */
2330 if (!ieee80211_parse_tx_radiotap(local, skb))
2331 goto fail_rcu;
2332
b9771d41 2333 ieee80211_xmit(sdata, NULL, skb, 0);
5d9cf4a5
JB		 2334 rcu_read_unlock();
2335
e2ebc74d 2336 return NETDEV_TX_OK;
9b8a74e3 2337
55de908a
JB		 2338fail_rcu:
2339 rcu_read_unlock();
9b8a74e3
AG		 2340fail:
2341 dev_kfree_skb(skb);
2342 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2343}
2344
97ffe757 2345static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2346{
97ffe757 2347 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2348
97ffe757
JB		 2349 return ethertype == ETH_P_TDLS &&
2350 skb->len > 14 &&
2351 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2352}
2353
2354static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2355 struct sk_buff *skb,
2356 struct sta_info **sta_out)
2357{
2358 struct sta_info *sta;
2359
2360 switch (sdata->vif.type) {
2361 case NL80211_IFTYPE_AP_VLAN:
2362 sta = rcu_dereference(sdata->u.vlan.sta);
2363 if (sta) {
2364 *sta_out = sta;
2365 return 0;
2366 } else if (sdata->wdev.use_4addr) {
2367 return -ENOLINK;
2368 }
2369 /* fall through */
2370 case NL80211_IFTYPE_AP:
2371 case NL80211_IFTYPE_OCB:
2372 case NL80211_IFTYPE_ADHOC:
2373 if (is_multicast_ether_addr(skb->data)) {
2374 *sta_out = ERR_PTR(-ENOENT);
2375 return 0;
2376 }
2377 sta = sta_info_get_bss(sdata, skb->data);
2378 break;
2379 case NL80211_IFTYPE_WDS:
2380 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2381 break;
2382#ifdef CONFIG_MAC80211_MESH
2383 case NL80211_IFTYPE_MESH_POINT:
2384 /* determined much later */
2385 *sta_out = NULL;
2386 return 0;
2387#endif
2388 case NL80211_IFTYPE_STATION:
2389 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2390 sta = sta_info_get(sdata, skb->data);
11d62caf
JB		 2391 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2392 if (test_sta_flag(sta,
2393 WLAN_STA_TDLS_PEER_AUTH)) {
97ffe757
JB		 2394 *sta_out = sta;
2395 return 0;
2396 }
2397
2398 /*
2399 * TDLS link during setup - throw out frames to
2400 * peer. Allow TDLS-setup frames to unauthorized
2401 * peers for the special case of a link teardown
2402 * after a TDLS sta is removed due to being
2403 * unreachable.
2404 */
11d62caf 2405 if (!ieee80211_is_tdls_setup(skb))
97ffe757
JB		 2406 return -EINVAL;
2407 }
2408
2409 }
2410
2411 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2412 if (!sta)
2413 return -ENOLINK;
2414 break;
2415 default:
2416 return -EINVAL;
2417 }
2418
2419 *sta_out = sta ?: ERR_PTR(-ENOENT);
2420 return 0;
ad38bfc9
MG		 2421}
2422
5d8983c8
JC		 2423static int ieee80211_store_ack_skb(struct ieee80211_local *local,
2424 struct sk_buff *skb,
2425 u32 *info_flags)
2426{
2427 struct sk_buff *ack_skb = skb_clone_sk(skb);
2428 u16 info_id = 0;
2429
2430 if (ack_skb) {
2431 unsigned long flags;
2432 int id;
2433
2434 spin_lock_irqsave(&local->ack_status_lock, flags);
2435 id = idr_alloc(&local->ack_status_frames, ack_skb,
6912daed 2436 1, 0x40, GFP_ATOMIC);
5d8983c8
JC		 2437 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2438
2439 if (id >= 0) {
2440 info_id = id;
2441 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2442 } else {
2443 kfree_skb(ack_skb);
2444 }
2445 }
2446
2447 return info_id;
2448}
2449
e2ebc74d 2450/**
4c9451ed
JB		 2451 * ieee80211_build_hdr - build 802.11 header in the given frame
2452 * @sdata: virtual interface to build the header for
2453 * @skb: the skb to build the header in
24d342c5 2454 * @info_flags: skb flags to set
06016772 2455 * @ctrl_flags: info control flags to set
e2ebc74d 2456 *
4c9451ed
JB		 2457 * This function takes the skb with 802.3 header and reformats the header to
2458 * the appropriate IEEE 802.11 header based on which interface the packet is
2459 * being transmitted on.
2460 *
2461 * Note that this function also takes care of the TX status request and
2462 * potential unsharing of the SKB - this needs to be interleaved with the
2463 * header building.
e2ebc74d 2464 *
4c9451ed
JB		 2465 * The function requires the read-side RCU lock held
2466 *
2467 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2468 */
4c9451ed 2469static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2470 struct sk_buff *skb, u32 info_flags,
06016772 2471 struct sta_info *sta, u32 ctrl_flags)
e2ebc74d 2472{
133b8226 2473 struct ieee80211_local *local = sdata->local;
489ee919 2474 struct ieee80211_tx_info *info;
dcf33963 2475 int head_need;
065e9605
HH		 2476 u16 ethertype, hdrlen, meshhdrlen = 0;
2477 __le16 fc;
e2ebc74d 2478 struct ieee80211_hdr hdr;
ff67bb86 2479 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2480 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2481 const u8 *encaps_data;
2482 int encaps_len, skip_header_bytes;
97ffe757
JB		 2483 bool wme_sta = false, authorized = false;
2484 bool tdls_peer;
a729cff8 2485 bool multicast;
a729cff8 2486 u16 info_id = 0;
55de908a
JB		 2487 struct ieee80211_chanctx_conf *chanctx_conf;
2488 struct ieee80211_sub_if_data *ap_sdata;
57fbcce3 2489 enum nl80211_band band;
4c9451ed 2490 int ret;
e2ebc74d 2491
97ffe757
JB		 2492 if (IS_ERR(sta))
2493 sta = NULL;
2494
276d9e82
JN		 2495#ifdef CONFIG_MAC80211_DEBUGFS
2496 if (local->force_tx_status)
2497 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2498#endif
2499
e2ebc74d
JB		 2500 /* convert Ethernet header to proper 802.11 header (based on
2501 * operation mode) */
2502 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2503 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2504
51fb61e7 2505 switch (sdata->vif.type) {
05c914fe 2506 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2507 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2508 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2509 /* RA TA DA SA */
2510 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2511 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2512 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2513 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2514 hdrlen = 30;
c2c98fde 2515 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2516 wme_sta = sta->sta.wme;
f14543ee 2517 }
55de908a
JB		 2518 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2519 u.ap);
2520 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
4c9451ed
JB		 2521 if (!chanctx_conf) {
2522 ret = -ENOTCONN;
2523 goto free;
2524 }
4bf88530 2525 band = chanctx_conf->def.chan->band;
97ffe757 2526 if (sdata->wdev.use_4addr)
f14543ee
FF		 2527 break;
2528 /* fall through */
2529 case NL80211_IFTYPE_AP:
fe80123d
AB		 2530 if (sdata->vif.type == NL80211_IFTYPE_AP)
2531 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2532 if (!chanctx_conf) {
2533 ret = -ENOTCONN;
2534 goto free;
2535 }
065e9605 2536 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2537 /* DA BSSID SA */
2538 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 2539 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2540 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2541 hdrlen = 24;
4bf88530 2542 band = chanctx_conf->def.chan->band;
cf966838 2543 break;
05c914fe 2544 case NL80211_IFTYPE_WDS:
065e9605 2545 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 2546 /* RA TA DA SA */
2547 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 2548 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2549 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2550 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2551 hdrlen = 30;
55de908a
JB		 2552 /*
2553 * This is the exception! WDS style interfaces are prohibited
2554 * when channel contexts are in used so this must be valid
2555 */
675a0b04 2556 band = local->hw.conf.chandef.chan->band;
cf966838 2557 break;
33b64eb2 2558#ifdef CONFIG_MAC80211_MESH
05c914fe 2559 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2560 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2561 struct sta_info *next_hop;
2562 bool mpp_lookup = true;
2563
bf7cd94d 2564 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2565 if (mpath) {
2566 mpp_lookup = false;
2567 next_hop = rcu_dereference(mpath->next_hop);
2568 if (!next_hop ||
2569 !(mpath->flags & (MESH_PATH_ACTIVE |
2570 MESH_PATH_RESOLVING)))
2571 mpp_lookup = true;
2572 }
2573
ab1c7906 2574 if (mpp_lookup) {
bf7cd94d 2575 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2576 if (mppath)
2577 mppath->exp_time = jiffies;
2578 }
163df6cf
CYY		 2579
2580 if (mppath && mpath)
2bdaf386 2581 mesh_path_del(sdata, mpath->dst);
b8bacc18 2582 }
79617dee 2583
f76b57b4 2584 /*
9d52501b
JF		 2585 * Use address extension if it is a packet from
2586 * another interface or if we know the destination
2587 * is being proxied by a portal (i.e. portal address
2588 * differs from proxied address)
f76b57b4 2589 */
b203ca39
JP		 2590 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2591 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2592 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2593 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2594 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2595 NULL, NULL);
79617dee 2596 } else {
27f01124
TP		 2597 /* DS -> MBSS (802.11-2012 13.11.3.3).
2598 * For unicast with unknown forwarding information,
2599 * destination might be in the MBSS or if that fails
2600 * forwarded to another mesh gate. In either case
2601 * resolution will be handled in ieee80211_xmit(), so
2602 * leave the original DA. This also works for mcast */
2603 const u8 *mesh_da = skb->data;
2604
2605 if (mppath)
2606 mesh_da = mppath->mpp;
2607 else if (mpath)
2608 mesh_da = mpath->dst;
79617dee 2609
3c5772a5 2610 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2611 mesh_da, sdata->vif.addr);
27f01124
TP		 2612 if (is_multicast_ether_addr(mesh_da))
2613 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2614 meshhdrlen = ieee80211_new_mesh_header(
2615 sdata, &mesh_hdr,
2616 skb->data + ETH_ALEN, NULL);
3c5772a5 2617 else
27f01124 2618 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2619 meshhdrlen = ieee80211_new_mesh_header(
2620 sdata, &mesh_hdr, skb->data,
2621 skb->data + ETH_ALEN);
79617dee 2622
79617dee 2623 }
55de908a 2624 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2625 if (!chanctx_conf) {
2626 ret = -ENOTCONN;
2627 goto free;
2628 }
4bf88530 2629 band = chanctx_conf->def.chan->band;
8828f81a
RM		 2630
2631 /* For injected frames, fill RA right away as nexthop lookup
2632 * will be skipped.
2633 */
2634 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2635 is_zero_ether_addr(hdr.addr1))
2636 memcpy(hdr.addr1, skb->data, ETH_ALEN);
33b64eb2
LCC		 2637 break;
2638#endif
05c914fe 2639 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2640 /* we already did checks when looking up the RA STA */
2641 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2642
97ffe757 2643 if (tdls_peer) {
941c93cd
AN		 2644 /* DA SA BSSID */
2645 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2646 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2647 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2648 hdrlen = 24;
2649 } else if (sdata->u.mgd.use_4addr &&
2650 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2651 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2652 IEEE80211_FCTL_TODS);
f14543ee 2653 /* RA TA DA SA */
941c93cd 2654 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 2655 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2656 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2657 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2658 hdrlen = 30;
2659 } else {
2660 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2661 /* BSSID SA DA */
941c93cd 2662 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 2663 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2664 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2665 hdrlen = 24;
2666 }
55de908a 2667 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2668 if (!chanctx_conf) {
2669 ret = -ENOTCONN;
2670 goto free;
2671 }
4bf88530 2672 band = chanctx_conf->def.chan->band;
cf966838 2673 break;
239281f8
RL		 2674 case NL80211_IFTYPE_OCB:
2675 /* DA SA BSSID */
2676 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2677 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2678 eth_broadcast_addr(hdr.addr3);
2679 hdrlen = 24;
2680 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2681 if (!chanctx_conf) {
2682 ret = -ENOTCONN;
2683 goto free;
2684 }
239281f8
RL		 2685 band = chanctx_conf->def.chan->band;
2686 break;
05c914fe 2687 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2688 /* DA SA BSSID */
2689 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2690 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2691 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2692 hdrlen = 24;
55de908a 2693 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2694 if (!chanctx_conf) {
2695 ret = -ENOTCONN;
2696 goto free;
2697 }
4bf88530 2698 band = chanctx_conf->def.chan->band;
cf966838
JB		 2699 break;
2700 default:
4c9451ed
JB		 2701 ret = -EINVAL;
2702 goto free;
e2ebc74d
JB		 2703 }
2704
a729cff8 2705 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2706
97ffe757
JB		 2707 /* sta is always NULL for mesh */
2708 if (sta) {
2709 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2710 wme_sta = sta->sta.wme;
2711 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2712 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2713 wme_sta = true;
97ffe757 2714 }
4777be41 2715
527871d7
JB		 2716 /* receiver does QoS (which also means we do) use it */
2717 if (wme_sta) {
065e9605 2718 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2719 hdrlen += 2;
2720 }
2721
2722 /*
238814fd
JB		 2723 * Drop unicast frames to unauthorised stations unless they are
2724 * EAPOL frames from the local station.
ce3edf6d 2725 */
55182e4a 2726 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2727 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2728 !multicast && !authorized &&
55182e4a 2729 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2730 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2731#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2732 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2733 sdata->name, hdr.addr1);
ce3edf6d
JB		 2734#endif
2735
2736 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2737
4c9451ed
JB		 2738 ret = -EPERM;
2739 goto free;
ce3edf6d
JB		 2740 }
2741
a729cff8 2742 if (unlikely(!multicast && skb->sk &&
5d8983c8
JC		 2743 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS))
2744 info_id = ieee80211_store_ack_skb(local, skb, &info_flags);
a729cff8 2745
7e244707
HS		 2746 /*
2747 * If the skb is shared we need to obtain our own copy.
2748 */
2749 if (skb_shared(skb)) {
a729cff8
JB		 2750 struct sk_buff *tmp_skb = skb;
2751
2752 /* can't happen -- skb is a clone if info_id != 0 */
2753 WARN_ON(info_id);
2754
f8a0a781 2755 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2756 kfree_skb(tmp_skb);
2757
4c9451ed
JB		 2758 if (!skb) {
2759 ret = -ENOMEM;
2760 goto free;
2761 }
7e244707
HS		 2762 }
2763
065e9605 2764 hdr.frame_control = fc;
e2ebc74d
JB		 2765 hdr.duration_id = 0;
2766 hdr.seq_ctrl = 0;
2767
2768 skip_header_bytes = ETH_HLEN;
2769 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2770 encaps_data = bridge_tunnel_header;
2771 encaps_len = sizeof(bridge_tunnel_header);
2772 skip_header_bytes -= 2;
e5c5d22e 2773 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2774 encaps_data = rfc1042_header;
2775 encaps_len = sizeof(rfc1042_header);
2776 skip_header_bytes -= 2;
2777 } else {
2778 encaps_data = NULL;
2779 encaps_len = 0;
2780 }
2781
2782 skb_pull(skb, skip_header_bytes);
23c0752a 2783 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2784
23c0752a
JB		 2785 /*
2786 * So we need to modify the skb header and hence need a copy of
2787 * that. The head_need variable above doesn't, so far, include
2788 * the needed header space that we don't need right away. If we
2789 * can, then we don't reallocate right now but only after the
2790 * frame arrives at the master device (if it does...)
2791 *
2792 * If we cannot, however, then we will reallocate to include all
2793 * the ever needed space. Also, if we need to reallocate it anyway,
2794 * make it big enough for everything we may ever need.
2795 */
e2ebc74d 2796
3a5be7d4 2797 if (head_need > 0 || skb_cloned(skb)) {
2475b1cc 2798 head_need += sdata->encrypt_headroom;
23c0752a
JB		 2799 head_need += local->tx_headroom;
2800 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2801 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2802 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2803 skb = NULL;
4c9451ed 2804 return ERR_PTR(-ENOMEM);
c3e7724b 2805 }
e2ebc74d
JB		 2806 }
2807
eae4430e 2808 if (encaps_data)
e2ebc74d 2809 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2810
e4ab7eb0 2811#ifdef CONFIG_MAC80211_MESH
eae4430e 2812 if (meshhdrlen > 0)
33b64eb2 2813 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2814#endif
33b64eb2 2815
065e9605 2816 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2817 __le16 *qos_control;
2818
d58ff351 2819 qos_control = skb_push(skb, 2);
c29b9b9b
JB		 2820 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2821 /*
2822 * Maybe we could actually set some fields here, for now just
2823 * initialise to zero to indicate no special operation.
2824 */
2825 *qos_control = 0;
2826 } else
2827 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2828
d57a544d 2829 skb_reset_mac_header(skb);
e2ebc74d 2830
489ee919 2831 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2832 memset(info, 0, sizeof(*info));
2833
a729cff8
JB		 2834 info->flags = info_flags;
2835 info->ack_frame_id = info_id;
73c4e195 2836 info->band = band;
06016772 2837 info->control.flags = ctrl_flags;
a729cff8 2838
4c9451ed
JB		 2839 return skb;
2840 free:
2841 kfree_skb(skb);
2842 return ERR_PTR(ret);
2843}
2844
17c18bf8
JB		 2845/*
2846 * fast-xmit overview
2847 *
2848 * The core idea of this fast-xmit is to remove per-packet checks by checking
2849 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2850 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2851 * much less work can be done per packet. For example, fragmentation must be
2852 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2853 * in the code here.
2854 *
2855 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2856 * header and other data to aid packet processing in ieee80211_xmit_fast().
2857 *
2858 * The most difficult part of this is that when any of these assumptions
2859 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2860 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2861 * since the per-packet code no longer checks the conditions. This is reflected
2862 * by the calls to these functions throughout the rest of the code, and must be
2863 * maintained if any of the TX path checks change.
2864 */
2865
2866void ieee80211_check_fast_xmit(struct sta_info *sta)
2867{
2868 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2869 struct ieee80211_local *local = sta->local;
2870 struct ieee80211_sub_if_data *sdata = sta->sdata;
2871 struct ieee80211_hdr *hdr = (void *)build.hdr;
2872 struct ieee80211_chanctx_conf *chanctx_conf;
2873 __le16 fc;
2874
30686bf7 2875 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 2876 return;
2877
2878 /* Locking here protects both the pointer itself, and against concurrent
2879 * invocations winning data access races to, e.g., the key pointer that
2880 * is used.
2881 * Without it, the invocation of this function right after the key
2882 * pointer changes wouldn't be sufficient, as another CPU could access
2883 * the pointer, then stall, and then do the cache update after the CPU
2884 * that invalidated the key.
2885 * With the locking, such scenarios cannot happen as the check for the
2886 * key and the fast-tx assignment are done atomically, so the CPU that
2887 * modifies the key will either wait or other one will see the key
2888 * cleared/changed already.
2889 */
2890 spin_lock_bh(&sta->lock);
30686bf7
JB		 2891 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2892 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 2893 sdata->vif.type == NL80211_IFTYPE_STATION)
2894 goto out;
2895
2896 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2897 goto out;
2898
2899 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2900 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 2901 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2902 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 2903 goto out;
2904
2905 if (sdata->noack_map)
2906 goto out;
2907
2908 /* fast-xmit doesn't handle fragmentation at all */
725b812c 2909 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
f3fe4e93 2910 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
17c18bf8
JB		 2911 goto out;
2912
2913 rcu_read_lock();
2914 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2915 if (!chanctx_conf) {
2916 rcu_read_unlock();
2917 goto out;
2918 }
2919 build.band = chanctx_conf->def.chan->band;
2920 rcu_read_unlock();
2921
2922 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2923
2924 switch (sdata->vif.type) {
3ffd8840
JB		 2925 case NL80211_IFTYPE_ADHOC:
2926 /* DA SA BSSID */
2927 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2928 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2929 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2930 build.hdr_len = 24;
2931 break;
17c18bf8
JB		 2932 case NL80211_IFTYPE_STATION:
2933 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2934 /* DA SA BSSID */
2935 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2936 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2937 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2938 build.hdr_len = 24;
2939 break;
2940 }
2941
2942 if (sdata->u.mgd.use_4addr) {
2943 /* non-regular ethertype cannot use the fastpath */
2944 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2945 IEEE80211_FCTL_TODS);
2946 /* RA TA DA SA */
2947 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2948 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2949 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2950 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2951 build.hdr_len = 30;
2952 break;
2953 }
2954 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2955 /* BSSID SA DA */
2956 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2957 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2958 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2959 build.hdr_len = 24;
2960 break;
2961 case NL80211_IFTYPE_AP_VLAN:
2962 if (sdata->wdev.use_4addr) {
2963 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2964 IEEE80211_FCTL_TODS);
2965 /* RA TA DA SA */
2966 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2967 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2968 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2969 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2970 build.hdr_len = 30;
2971 break;
2972 }
2973 /* fall through */
2974 case NL80211_IFTYPE_AP:
2975 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2976 /* DA BSSID SA */
2977 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2978 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2979 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2980 build.hdr_len = 24;
2981 break;
2982 default:
2983 /* not handled on fast-xmit */
2984 goto out;
2985 }
2986
2987 if (sta->sta.wme) {
2988 build.hdr_len += 2;
2989 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2990 }
2991
2992 /* We store the key here so there's no point in using rcu_dereference()
2993 * but that's fine because the code that changes the pointers will call
2994 * this function after doing so. For a single CPU that would be enough,
2995 * for multiple see the comment above.
2996 */
2997 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2998 if (!build.key)
2999 build.key = rcu_access_pointer(sdata->default_unicast_key);
3000 if (build.key) {
e495c247 3001 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 3002
3003 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3004 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
9de18d81
DS		 3005 mmic = build.key->conf.flags &
3006 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3007 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
17c18bf8
JB		 3008
3009 /* don't handle software crypto */
3010 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3011 goto out;
3012
62872a9b
AW		 3013 /* Key is being removed */
3014 if (build.key->flags & KEY_FLAG_TAINTED)
3015 goto out;
3016
17c18bf8
JB		 3017 switch (build.key->conf.cipher) {
3018 case WLAN_CIPHER_SUITE_CCMP:
3019 case WLAN_CIPHER_SUITE_CCMP_256:
96fc6efb 3020 if (gen_iv)
17c18bf8 3021 build.pn_offs = build.hdr_len;
17c18bf8
JB		 3022 if (gen_iv || iv_spc)
3023 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3024 break;
3025 case WLAN_CIPHER_SUITE_GCMP:
3026 case WLAN_CIPHER_SUITE_GCMP_256:
96fc6efb 3027 if (gen_iv)
17c18bf8 3028 build.pn_offs = build.hdr_len;
17c18bf8
JB		 3029 if (gen_iv || iv_spc)
3030 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3031 break;
e495c247
JB		 3032 case WLAN_CIPHER_SUITE_TKIP:
3033 /* cannot handle MMIC or IV generation in xmit-fast */
3034 if (mmic || gen_iv)
3035 goto out;
3036 if (iv_spc)
3037 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3038 break;
3039 case WLAN_CIPHER_SUITE_WEP40:
3040 case WLAN_CIPHER_SUITE_WEP104:
3041 /* cannot handle IV generation in fast-xmit */
3042 if (gen_iv)
3043 goto out;
3044 if (iv_spc)
3045 build.hdr_len += IEEE80211_WEP_IV_LEN;
3046 break;
3047 case WLAN_CIPHER_SUITE_AES_CMAC:
3048 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3049 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3050 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3051 WARN(1,
3052 "management cipher suite 0x%x enabled for data\n",
3053 build.key->conf.cipher);
17c18bf8 3054 goto out;
e495c247
JB		 3055 default:
3056 /* we don't know how to generate IVs for this at all */
3057 if (WARN_ON(gen_iv))
3058 goto out;
3059 /* pure hardware keys are OK, of course */
3060 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3061 break;
3062 /* cipher scheme might require space allocation */
3063 if (iv_spc &&
3064 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3065 goto out;
3066 if (iv_spc)
3067 build.hdr_len += build.key->conf.iv_len;
17c18bf8
JB		 3068 }
3069
3070 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3071 }
3072
3073 hdr->frame_control = fc;
3074
3075 memcpy(build.hdr + build.hdr_len,
3076 rfc1042_header, sizeof(rfc1042_header));
3077 build.hdr_len += sizeof(rfc1042_header);
3078
3079 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3080 /* if the kmemdup fails, continue w/o fast_tx */
3081 if (!fast_tx)
3082 goto out;
3083
3084 out:
3085 /* we might have raced against another call to this function */
3086 old = rcu_dereference_protected(sta->fast_tx,
3087 lockdep_is_held(&sta->lock));
3088 rcu_assign_pointer(sta->fast_tx, fast_tx);
3089 if (old)
3090 kfree_rcu(old, rcu_head);
3091 spin_unlock_bh(&sta->lock);
3092}
3093
3094void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3095{
3096 struct sta_info *sta;
3097
3098 rcu_read_lock();
3099 list_for_each_entry_rcu(sta, &local->sta_list, list)
3100 ieee80211_check_fast_xmit(sta);
3101 rcu_read_unlock();
3102}
3103
3104void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3105{
3106 struct ieee80211_local *local = sdata->local;
3107 struct sta_info *sta;
3108
3109 rcu_read_lock();
3110
3111 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3112 if (sdata != sta->sdata &&
3113 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3114 continue;
3115 ieee80211_check_fast_xmit(sta);
3116 }
3117
3118 rcu_read_unlock();
3119}
3120
3121void ieee80211_clear_fast_xmit(struct sta_info *sta)
3122{
3123 struct ieee80211_fast_tx *fast_tx;
3124
3125 spin_lock_bh(&sta->lock);
3126 fast_tx = rcu_dereference_protected(sta->fast_tx,
3127 lockdep_is_held(&sta->lock));
3128 RCU_INIT_POINTER(sta->fast_tx, NULL);
3129 spin_unlock_bh(&sta->lock);
3130
3131 if (fast_tx)
3132 kfree_rcu(fast_tx, rcu_head);
3133}
3134
6e0456b5 3135static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
166ac9d5 3136 struct sk_buff *skb, int headroom)
6e0456b5 3137{
166ac9d5 3138 if (skb_headroom(skb) < headroom) {
6e0456b5
FF		 3139 I802_DEBUG_INC(local->tx_expand_skb_head);
3140
166ac9d5 3141 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
6e0456b5
FF		 3142 wiphy_debug(local->hw.wiphy,
3143 "failed to reallocate TX buffer\n");
3144 return false;
3145 }
3146 }
3147
6e0456b5
FF		 3148 return true;
3149}
3150
3151static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3152 struct ieee80211_fast_tx *fast_tx,
3153 struct sk_buff *skb)
3154{
3155 struct ieee80211_local *local = sdata->local;
3156 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3157 struct ieee80211_hdr *hdr;
06f2bb1e 3158 struct ethhdr *amsdu_hdr;
6e0456b5
FF		 3159 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3160 int subframe_len = skb->len - hdr_len;
3161 void *data;
06f2bb1e 3162 u8 *qc, *h_80211_src, *h_80211_dst;
a3e2f4b6 3163 const u8 *bssid;
6e0456b5
FF		 3164
3165 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3166 return false;
3167
3168 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3169 return true;
3170
166ac9d5 3171 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr)))
6e0456b5
FF		 3172 return false;
3173
06f2bb1e
MB		 3174 data = skb_push(skb, sizeof(*amsdu_hdr));
3175 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3176 hdr = data;
3177 amsdu_hdr = data + hdr_len;
3178 /* h_80211_src/dst is addr* field within hdr */
3179 h_80211_src = data + fast_tx->sa_offs;
3180 h_80211_dst = data + fast_tx->da_offs;
6e0456b5 3181
06f2bb1e
MB		 3182 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3183 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3184 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
6e0456b5 3185
a3e2f4b6
MB		 3186 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3187 * fields needs to be changed to BSSID for A-MSDU frames depending
3188 * on FromDS/ToDS values.
3189 */
3190 switch (sdata->vif.type) {
3191 case NL80211_IFTYPE_STATION:
3192 bssid = sdata->u.mgd.bssid;
3193 break;
3194 case NL80211_IFTYPE_AP:
3195 case NL80211_IFTYPE_AP_VLAN:
3196 bssid = sdata->vif.addr;
3197 break;
3198 default:
3199 bssid = NULL;
3200 }
3201
3202 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3203 ether_addr_copy(h_80211_src, bssid);
3204
3205 if (bssid && ieee80211_has_tods(hdr->frame_control))
3206 ether_addr_copy(h_80211_dst, bssid);
3207
6e0456b5
FF		 3208 qc = ieee80211_get_qos_ctl(hdr);
3209 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3210
3211 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3212
3213 return true;
3214}
3215
3216static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3217 struct sta_info *sta,
3218 struct ieee80211_fast_tx *fast_tx,
3219 struct sk_buff *skb)
3220{
3221 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3222 struct fq *fq = &local->fq;
3223 struct fq_tin *tin;
3224 struct fq_flow *flow;
6e0456b5
FF		 3225 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3226 struct ieee80211_txq *txq = sta->sta.txq[tid];
3227 struct txq_info *txqi;
3228 struct sk_buff **frag_tail, *head;
3229 int subframe_len = skb->len - ETH_ALEN;
3230 u8 max_subframes = sta->sta.max_amsdu_subframes;
3231 int max_frags = local->hw.max_tx_fragments;
3232 int max_amsdu_len = sta->sta.max_amsdu_len;
eb9b64e3 3233 int orig_truesize;
f2af2df8 3234 u32 flow_idx;
6e0456b5
FF		 3235 __be16 len;
3236 void *data;
3237 bool ret = false;
fa962b92 3238 unsigned int orig_len;
66eb02d8 3239 int n = 2, nfrags, pad = 0;
166ac9d5 3240 u16 hdrlen;
6e0456b5
FF		 3241
3242 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3243 return false;
3244
344f8e00
SS		 3245 if (skb_is_gso(skb))
3246 return false;
3247
6e0456b5
FF		 3248 if (!txq)
3249 return false;
3250
3251 txqi = to_txq_info(txq);
3252 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3253 return false;
3254
3255 if (sta->sta.max_rc_amsdu_len)
3256 max_amsdu_len = min_t(int, max_amsdu_len,
3257 sta->sta.max_rc_amsdu_len);
3258
edba6bda
SS		 3259 if (sta->sta.max_tid_amsdu_len[tid])
3260 max_amsdu_len = min_t(int, max_amsdu_len,
3261 sta->sta.max_tid_amsdu_len[tid]);
3262
f2af2df8
FF		 3263 flow_idx = fq_flow_idx(fq, skb);
3264
fa962b92 3265 spin_lock_bh(&fq->lock);
6e0456b5 3266
fa962b92
MK		 3267 /* TODO: Ideally aggregation should be done on dequeue to remain
3268 * responsive to environment changes.
3269 */
3270
3271 tin = &txqi->tin;
f2af2df8
FF		 3272 flow = fq_flow_classify(fq, tin, flow_idx, skb,
3273 fq_flow_get_default_func);
fa962b92 3274 head = skb_peek_tail(&flow->queue);
344f8e00 3275 if (!head || skb_is_gso(head))
6e0456b5
FF		 3276 goto out;
3277
eb9b64e3 3278 orig_truesize = head->truesize;
fa962b92
MK		 3279 orig_len = head->len;
3280
6e0456b5
FF		 3281 if (skb->len + head->len > max_amsdu_len)
3282 goto out;
3283
6e0456b5
FF		 3284 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3285 nfrags += 1 + skb_shinfo(head)->nr_frags;
3286 frag_tail = &skb_shinfo(head)->frag_list;
3287 while (*frag_tail) {
3288 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3289 frag_tail = &(*frag_tail)->next;
3290 n++;
3291 }
3292
3293 if (max_subframes && n > max_subframes)
3294 goto out;
3295
3296 if (max_frags && nfrags > max_frags)
3297 goto out;
9739fe29
SS		 3298
3299 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3300 goto out;
6e0456b5 3301
1eb50790 3302 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
6e0456b5
FF		 3303 goto out;
3304
166ac9d5
SS		 3305 /*
3306 * Pad out the previous subframe to a multiple of 4 by adding the
3307 * padding to the next one, that's being added. Note that head->len
3308 * is the length of the full A-MSDU, but that works since each time
3309 * we add a new subframe we pad out the previous one to a multiple
3310 * of 4 and thus it no longer matters in the next round.
3311 */
3312 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3313 if ((head->len - hdrlen) & 3)
3314 pad = 4 - ((head->len - hdrlen) & 3);
3315
3316 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3317 2 + pad))
aa58acf3 3318 goto out_recalc;
6e0456b5
FF		 3319
3320 ret = true;
3321 data = skb_push(skb, ETH_ALEN + 2);
3322 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3323
3324 data += 2 * ETH_ALEN;
3325 len = cpu_to_be16(subframe_len);
3326 memcpy(data, &len, 2);
3327 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3328
166ac9d5
SS		 3329 memset(skb_push(skb, pad), 0, pad);
3330
6e0456b5
FF		 3331 head->len += skb->len;
3332 head->data_len += skb->len;
3333 *frag_tail = skb;
3334
aa58acf3 3335out_recalc:
eb9b64e3 3336 fq->memory_usage += head->truesize - orig_truesize;
aa58acf3
JB		 3337 if (head->len != orig_len) {
3338 flow->backlog += head->len - orig_len;
3339 tin->backlog_bytes += head->len - orig_len;
fa962b92 3340
aa58acf3
JB		 3341 fq_recalc_backlog(fq, tin, flow);
3342 }
6e0456b5 3343out:
fa962b92 3344 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3345
3346 return ret;
3347}
3348
bb42f2d1
THJ		 3349/*
3350 * Can be called while the sta lock is held. Anything that can cause packets to
3351 * be generated will cause deadlock!
3352 */
3353static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3354 struct sta_info *sta, u8 pn_offs,
3355 struct ieee80211_key *key,
3356 struct sk_buff *skb)
3357{
3358 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3359 struct ieee80211_hdr *hdr = (void *)skb->data;
3360 u8 tid = IEEE80211_NUM_TIDS;
3361
3362 if (key)
3363 info->control.hw_key = &key->conf;
3364
3365 ieee80211_tx_stats(skb->dev, skb->len);
3366
3367 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3368 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
bb42f2d1
THJ		 3369 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3370 } else {
3371 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3372 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3373 sdata->sequence_number += 0x10;
3374 }
3375
3376 if (skb_shinfo(skb)->gso_size)
3377 sta->tx_stats.msdu[tid] +=
3378 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3379 else
3380 sta->tx_stats.msdu[tid]++;
3381
3382 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3383
3384 /* statistics normally done by ieee80211_tx_h_stats (but that
3385 * has to consider fragmentation, so is more complex)
3386 */
3387 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3388 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3389
3390 if (pn_offs) {
3391 u64 pn;
3392 u8 *crypto_hdr = skb->data + pn_offs;
3393
3394 switch (key->conf.cipher) {
3395 case WLAN_CIPHER_SUITE_CCMP:
3396 case WLAN_CIPHER_SUITE_CCMP_256:
3397 case WLAN_CIPHER_SUITE_GCMP:
3398 case WLAN_CIPHER_SUITE_GCMP_256:
3399 pn = atomic64_inc_return(&key->conf.tx_pn);
3400 crypto_hdr[0] = pn;
3401 crypto_hdr[1] = pn >> 8;
96fc6efb 3402 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
bb42f2d1
THJ		 3403 crypto_hdr[4] = pn >> 16;
3404 crypto_hdr[5] = pn >> 24;
3405 crypto_hdr[6] = pn >> 32;
3406 crypto_hdr[7] = pn >> 40;
3407 break;
3408 }
3409 }
3410}
3411
17c18bf8 3412static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
bb42f2d1 3413 struct sta_info *sta,
17c18bf8
JB		 3414 struct ieee80211_fast_tx *fast_tx,
3415 struct sk_buff *skb)
3416{
3417 struct ieee80211_local *local = sdata->local;
3418 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3419 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3420 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3421 struct ethhdr eth;
35f432a0 3422 struct ieee80211_tx_info *info;
17c18bf8
JB		 3423 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3424 struct ieee80211_tx_data tx;
3425 ieee80211_tx_result r;
3426 struct tid_ampdu_tx *tid_tx = NULL;
3427 u8 tid = IEEE80211_NUM_TIDS;
3428
3429 /* control port protocol needs a lot of special handling */
3430 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3431 return false;
3432
3433 /* only RFC 1042 SNAP */
3434 if (ethertype < ETH_P_802_3_MIN)
3435 return false;
3436
3437 /* don't handle TX status request here either */
3438 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3439 return false;
3440
3441 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3442 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3443 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
472be00d
JB		 3444 if (tid_tx) {
3445 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3446 return false;
3447 if (tid_tx->timeout)
3448 tid_tx->last_tx = jiffies;
3449 }
17c18bf8
JB		 3450 }
3451
3452 /* after this point (skb is modified) we cannot return false */
3453
3454 if (skb_shared(skb)) {
3455 struct sk_buff *tmp_skb = skb;
3456
3457 skb = skb_clone(skb, GFP_ATOMIC);
3458 kfree_skb(tmp_skb);
3459
3460 if (!skb)
3461 return true;
3462 }
3463
6e0456b5
FF		 3464 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3465 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3466 return true;
3467
17c18bf8
JB		 3468 /* will not be crypto-handled beyond what we do here, so use false
3469 * as the may-encrypt argument for the resize to not account for
3470 * more room than we already have in 'extra_head'
3471 */
3472 if (unlikely(ieee80211_skb_resize(sdata, skb,
3473 max_t(int, extra_head + hw_headroom -
3474 skb_headroom(skb), 0),
3475 false))) {
3476 kfree_skb(skb);
3477 return true;
3478 }
3479
3480 memcpy(&eth, skb->data, ETH_HLEN - 2);
d58ff351 3481 hdr = skb_push(skb, extra_head);
17c18bf8
JB		 3482 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3483 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3484 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3485
35f432a0 3486 info = IEEE80211_SKB_CB(skb);
17c18bf8
JB		 3487 memset(info, 0, sizeof(*info));
3488 info->band = fast_tx->band;
3489 info->control.vif = &sdata->vif;
3490 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3491 IEEE80211_TX_CTL_DONTFRAG |
3492 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
bb42f2d1 3493 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
17c18bf8 3494
276d9e82
JN		 3495#ifdef CONFIG_MAC80211_DEBUGFS
3496 if (local->force_tx_status)
3497 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3498#endif
3499
a786f96d
FF		 3500 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3501 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3502 *ieee80211_get_qos_ctl(hdr) = tid;
3503 }
3504
17c18bf8
JB		 3505 __skb_queue_head_init(&tx.skbs);
3506
3507 tx.flags = IEEE80211_TX_UNICAST;
3508 tx.local = local;
3509 tx.sdata = sdata;
3510 tx.sta = sta;
3511 tx.key = fast_tx->key;
3512
30686bf7 3513 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
17c18bf8
JB		 3514 tx.skb = skb;
3515 r = ieee80211_tx_h_rate_ctrl(&tx);
3516 skb = tx.skb;
3517 tx.skb = NULL;
3518
3519 if (r != TX_CONTINUE) {
3520 if (r != TX_QUEUED)
3521 kfree_skb(skb);
3522 return true;
3523 }
3524 }
3525
bb42f2d1
THJ		 3526 if (ieee80211_queue_skb(local, sdata, sta, skb))
3527 return true;
17c18bf8 3528
bb42f2d1
THJ		 3529 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3530 fast_tx->key, skb);
17c18bf8
JB		 3531
3532 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3533 sdata = container_of(sdata->bss,
3534 struct ieee80211_sub_if_data, u.ap);
3535
3536 __skb_queue_tail(&tx.skbs, skb);
4fd0328d 3537 ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false);
17c18bf8
JB		 3538 return true;
3539}
3540
e0e2efff
THJ		 3541struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3542 struct ieee80211_txq *txq)
3543{
3544 struct ieee80211_local *local = hw_to_local(hw);
3545 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3546 struct ieee80211_hdr *hdr;
3547 struct sk_buff *skb = NULL;
3548 struct fq *fq = &local->fq;
3549 struct fq_tin *tin = &txqi->tin;
bb42f2d1
THJ		 3550 struct ieee80211_tx_info *info;
3551 struct ieee80211_tx_data tx;
3552 ieee80211_tx_result r;
21a5d4c3 3553 struct ieee80211_vif *vif = txq->vif;
e0e2efff 3554
fb0e76ab
ES		 3555 WARN_ON_ONCE(softirq_count() == 0);
3556
7a89233a
THJ		 3557 if (!ieee80211_txq_airtime_check(hw, txq))
3558 return NULL;
3559
ded4698b 3560begin:
e0e2efff
THJ		 3561 spin_lock_bh(&fq->lock);
3562
21a5d4c3
MP		 3563 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) ||
3564 test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags))
e0e2efff
THJ		 3565 goto out;
3566
21a5d4c3
MP		 3567 if (vif->txqs_stopped[ieee80211_ac_from_tid(txq->tid)]) {
3568 set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags);
3569 goto out;
3570 }
3571
bb42f2d1
THJ		 3572 /* Make sure fragments stay together. */
3573 skb = __skb_dequeue(&txqi->frags);
3574 if (skb)
3575 goto out;
3576
e0e2efff
THJ		 3577 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3578 if (!skb)
3579 goto out;
3580
ded4698b
FF		 3581 spin_unlock_bh(&fq->lock);
3582
e0e2efff 3583 hdr = (struct ieee80211_hdr *)skb->data;
bb42f2d1
THJ		 3584 info = IEEE80211_SKB_CB(skb);
3585
3586 memset(&tx, 0, sizeof(tx));
3587 __skb_queue_head_init(&tx.skbs);
3588 tx.local = local;
3589 tx.skb = skb;
3590 tx.sdata = vif_to_sdata(info->control.vif);
3591
3592 if (txq->sta)
3593 tx.sta = container_of(txq->sta, struct sta_info, sta);
3594
3595 /*
3596 * The key can be removed while the packet was queued, so need to call
3597 * this here to get the current key.
3598 */
3599 r = ieee80211_tx_h_select_key(&tx);
3600 if (r != TX_CONTINUE) {
3601 ieee80211_free_txskb(&local->hw, skb);
3602 goto begin;
3603 }
3604
c1f4c9ed
FF		 3605 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3606 info->flags |= IEEE80211_TX_CTL_AMPDU;
3607 else
3608 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3609
bb42f2d1 3610 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
e0e2efff
THJ		 3611 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3612 sta);
bb42f2d1 3613 u8 pn_offs = 0;
e0e2efff 3614
bb42f2d1
THJ		 3615 if (tx.key &&
3616 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3617 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3618
3619 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3620 tx.key, skb);
3621 } else {
3622 if (invoke_tx_handlers_late(&tx))
3623 goto begin;
3624
3625 skb = __skb_dequeue(&tx.skbs);
3626
ded4698b
FF		 3627 if (!skb_queue_empty(&tx.skbs)) {
3628 spin_lock_bh(&fq->lock);
bb42f2d1 3629 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
ded4698b
FF		 3630 spin_unlock_bh(&fq->lock);
3631 }
e0e2efff
THJ		 3632 }
3633
233e98dc 3634 if (skb_has_frag_list(skb) &&
1e1430d5
JB		 3635 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3636 if (skb_linearize(skb)) {
3637 ieee80211_free_txskb(&local->hw, skb);
3638 goto begin;
3639 }
3640 }
3641
53168215
JB		 3642 switch (tx.sdata->vif.type) {
3643 case NL80211_IFTYPE_MONITOR:
3644 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3645 vif = &tx.sdata->vif;
3646 break;
3647 }
3648 tx.sdata = rcu_dereference(local->monitor_sdata);
3649 if (tx.sdata) {
3650 vif = &tx.sdata->vif;
3651 info->hw_queue =
3652 vif->hw_queue[skb_get_queue_mapping(skb)];
3653 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3654 ieee80211_free_txskb(&local->hw, skb);
3655 goto begin;
3656 } else {
3657 vif = NULL;
3658 }
3659 break;
3660 case NL80211_IFTYPE_AP_VLAN:
3661 tx.sdata = container_of(tx.sdata->bss,
3662 struct ieee80211_sub_if_data, u.ap);
3663 /* fall through */
3664 default:
3665 vif = &tx.sdata->vif;
3666 break;
3667 }
3668
3669 IEEE80211_SKB_CB(skb)->control.vif = vif;
7a89233a
THJ		 3670
3671 if (local->airtime_flags & AIRTIME_USE_AQL) {
3672 u32 airtime;
3673
3674 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta,
3675 skb->len);
3676 if (airtime) {
3677 airtime = ieee80211_info_set_tx_time_est(info, airtime);
3678 ieee80211_sta_update_pending_airtime(local, tx.sta,
3679 txq->ac,
3680 airtime,
3681 false);
3682 }
3683 }
3684
ded4698b 3685 return skb;
21a5d4c3 3686
e0e2efff
THJ		 3687out:
3688 spin_unlock_bh(&fq->lock);
3689
e0e2efff
THJ		 3690 return skb;
3691}
3692EXPORT_SYMBOL(ieee80211_tx_dequeue);
3693
18667600
THJ		 3694struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
3695{
3696 struct ieee80211_local *local = hw_to_local(hw);
5b989c18 3697 struct ieee80211_txq *ret = NULL;
3ace10f5
KY		 3698 struct txq_info *txqi = NULL, *head = NULL;
3699 bool found_eligible_txq = false;
18667600 3700
5b989c18 3701 spin_lock_bh(&local->active_txq_lock[ac]);
18667600 3702
b4809e94 3703 begin:
18667600
THJ		 3704 txqi = list_first_entry_or_null(&local->active_txqs[ac],
3705 struct txq_info,
3706 schedule_order);
b4809e94 3707 if (!txqi)
5b989c18 3708 goto out;
b4809e94 3709
3ace10f5
KY		 3710 if (txqi == head) {
3711 if (!found_eligible_txq)
3712 goto out;
3713 else
3714 found_eligible_txq = false;
3715 }
3716
3717 if (!head)
3718 head = txqi;
3719
b4809e94
THJ		 3720 if (txqi->txq.sta) {
3721 struct sta_info *sta = container_of(txqi->txq.sta,
3ace10f5
KY		 3722 struct sta_info, sta);
3723 bool aql_check = ieee80211_txq_airtime_check(hw, &txqi->txq);
3724 s64 deficit = sta->airtime[txqi->txq.ac].deficit;
b4809e94 3725
3ace10f5
KY		 3726 if (aql_check)
3727 found_eligible_txq = true;
3728
3729 if (deficit < 0)
b4809e94
THJ		 3730 sta->airtime[txqi->txq.ac].deficit +=
3731 sta->airtime_weight;
3ace10f5
KY		 3732
3733 if (deficit < 0 || !aql_check) {
b4809e94
THJ		 3734 list_move_tail(&txqi->schedule_order,
3735 &local->active_txqs[txqi->txq.ac]);
3736 goto begin;
3737 }
3738 }
3739
18667600 3740
b4809e94 3741 if (txqi->schedule_round == local->schedule_round[ac])
5b989c18 3742 goto out;
18667600
THJ		 3743
3744 list_del_init(&txqi->schedule_order);
3745 txqi->schedule_round = local->schedule_round[ac];
5b989c18
FF		 3746 ret = &txqi->txq;
3747
3748out:
3749 spin_unlock_bh(&local->active_txq_lock[ac]);
3750 return ret;
18667600
THJ		 3751}
3752EXPORT_SYMBOL(ieee80211_next_txq);
3753
2b4a6698
FF		 3754void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
3755 struct ieee80211_txq *txq,
3756 bool force)
18667600
THJ		 3757{
3758 struct ieee80211_local *local = hw_to_local(hw);
3759 struct txq_info *txqi = to_txq_info(txq);
3760
5b989c18 3761 spin_lock_bh(&local->active_txq_lock[txq->ac]);
18667600
THJ		 3762
3763 if (list_empty(&txqi->schedule_order) &&
2b4a6698
FF		 3764 (force || !skb_queue_empty(&txqi->frags) ||
3765 txqi->tin.backlog_packets)) {
b4809e94
THJ		 3766 /* If airtime accounting is active, always enqueue STAs at the
3767 * head of the list to ensure that they only get moved to the
3768 * back by the airtime DRR scheduler once they have a negative
3769 * deficit. A station that already has a negative deficit will
3770 * get immediately moved to the back of the list on the next
3771 * call to ieee80211_next_txq().
3772 */
3773 if (txqi->txq.sta &&
3774 wiphy_ext_feature_isset(local->hw.wiphy,
3775 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
3776 list_add(&txqi->schedule_order,
3777 &local->active_txqs[txq->ac]);
3778 else
3779 list_add_tail(&txqi->schedule_order,
3780 &local->active_txqs[txq->ac]);
3781 }
18667600 3782
390298e8
THJ		 3783 spin_unlock_bh(&local->active_txq_lock[txq->ac]);
3784}
2b4a6698 3785EXPORT_SYMBOL(__ieee80211_schedule_txq);
390298e8 3786
3ace10f5
KY		 3787bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
3788 struct ieee80211_txq *txq)
3789{
3790 struct sta_info *sta;
3791 struct ieee80211_local *local = hw_to_local(hw);
3792
3793 if (!(local->airtime_flags & AIRTIME_USE_AQL))
3794 return true;
3795
3796 if (!txq->sta)
3797 return true;
3798
3799 sta = container_of(txq->sta, struct sta_info, sta);
3800 if (atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
3801 sta->airtime[txq->ac].aql_limit_low)
3802 return true;
3803
3804 if (atomic_read(&local->aql_total_pending_airtime) <
3805 local->aql_threshold &&
3806 atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
3807 sta->airtime[txq->ac].aql_limit_high)
3808 return true;
3809
3810 return false;
3811}
3812EXPORT_SYMBOL(ieee80211_txq_airtime_check);
3813
b4809e94
THJ		 3814bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
3815 struct ieee80211_txq *txq)
3816{
3817 struct ieee80211_local *local = hw_to_local(hw);
3818 struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
3819 struct sta_info *sta;
3820 u8 ac = txq->ac;
3821
5b989c18 3822 spin_lock_bh(&local->active_txq_lock[ac]);
b4809e94
THJ		 3823
3824 if (!txqi->txq.sta)
3825 goto out;
3826
3827 if (list_empty(&txqi->schedule_order))
3828 goto out;
3829
3830 list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
3831 schedule_order) {
3832 if (iter == txqi)
3833 break;
3834
3835 if (!iter->txq.sta) {
3836 list_move_tail(&iter->schedule_order,
3837 &local->active_txqs[ac]);
3838 continue;
3839 }
3840 sta = container_of(iter->txq.sta, struct sta_info, sta);
3841 if (sta->airtime[ac].deficit < 0)
3842 sta->airtime[ac].deficit += sta->airtime_weight;
3843 list_move_tail(&iter->schedule_order, &local->active_txqs[ac]);
3844 }
3845
3846 sta = container_of(txqi->txq.sta, struct sta_info, sta);
3847 if (sta->airtime[ac].deficit >= 0)
3848 goto out;
3849
3850 sta->airtime[ac].deficit += sta->airtime_weight;
3851 list_move_tail(&txqi->schedule_order, &local->active_txqs[ac]);
5b989c18 3852 spin_unlock_bh(&local->active_txq_lock[ac]);
b4809e94
THJ		 3853
3854 return false;
3855out:
3856 if (!list_empty(&txqi->schedule_order))
3857 list_del_init(&txqi->schedule_order);
5b989c18 3858 spin_unlock_bh(&local->active_txq_lock[ac]);
b4809e94
THJ		 3859
3860 return true;
3861}
3862EXPORT_SYMBOL(ieee80211_txq_may_transmit);
3863
18667600 3864void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
18667600
THJ		 3865{
3866 struct ieee80211_local *local = hw_to_local(hw);
3867
3868 spin_lock_bh(&local->active_txq_lock[ac]);
3869 local->schedule_round[ac]++;
18667600
THJ		 3870 spin_unlock_bh(&local->active_txq_lock[ac]);
3871}
5b989c18 3872EXPORT_SYMBOL(ieee80211_txq_schedule_start);
18667600 3873
4c9451ed
JB		 3874void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3875 struct net_device *dev,
06016772
RM		 3876 u32 info_flags,
3877 u32 ctrl_flags)
4c9451ed
JB		 3878{
3879 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1974da8b 3880 struct ieee80211_local *local = sdata->local;
97ffe757 3881 struct sta_info *sta;
80616c0d 3882 struct sk_buff *next;
4c9451ed
JB		 3883
3884 if (unlikely(skb->len < ETH_HLEN)) {
3885 kfree_skb(skb);
3886 return;
3887 }
3888
3889 rcu_read_lock();
e2ebc74d 3890
2d981fdd
JB		 3891 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3892 goto out_free;
4c9451ed 3893
1974da8b
FF		 3894 if (IS_ERR(sta))
3895 sta = NULL;
3896
3897 if (local->ops->wake_tx_queue) {
3898 u16 queue = __ieee80211_select_queue(sdata, sta, skb);
3899 skb_set_queue_mapping(skb, queue);
3900 }
3901
3902 if (sta) {
17c18bf8
JB		 3903 struct ieee80211_fast_tx *fast_tx;
3904
70e53669 3905 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
36148c2b 3906
17c18bf8
JB		 3907 fast_tx = rcu_dereference(sta->fast_tx);
3908
3909 if (fast_tx &&
bb42f2d1 3910 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
17c18bf8
JB		 3911 goto out;
3912 }
3913
80616c0d
JB		 3914 if (skb_is_gso(skb)) {
3915 struct sk_buff *segs;
680a0dab 3916
80616c0d
JB		 3917 segs = skb_gso_segment(skb, 0);
3918 if (IS_ERR(segs)) {
2d981fdd 3919 goto out_free;
80616c0d
JB		 3920 } else if (segs) {
3921 consume_skb(skb);
3922 skb = segs;
3923 }
3924 } else {
3925 /* we cannot process non-linear frames on this path */
3926 if (skb_linearize(skb)) {
3927 kfree_skb(skb);
3928 goto out;
3929 }
3930
3931 /* the frame could be fragmented, software-encrypted, and other
3932 * things so we cannot really handle checksum offload with it -
3933 * fix it up in software before we handle anything else.
3934 */
3935 if (skb->ip_summed == CHECKSUM_PARTIAL) {
f603f1f3
JB		 3936 skb_set_transport_header(skb,
3937 skb_checksum_start_offset(skb));
80616c0d
JB		 3938 if (skb_checksum_help(skb))
3939 goto out_free;
3940 }
2d981fdd
JB		 3941 }
3942
80616c0d
JB		 3943 next = skb;
3944 while (next) {
3945 skb = next;
3946 next = skb->next;
4c9451ed 3947
80616c0d
JB		 3948 skb->prev = NULL;
3949 skb->next = NULL;
3950
06016772
RM		 3951 skb = ieee80211_build_hdr(sdata, skb, info_flags,
3952 sta, ctrl_flags);
80616c0d
JB		 3953 if (IS_ERR(skb))
3954 goto out;
e2ebc74d 3955
5a490510 3956 ieee80211_tx_stats(dev, skb->len);
80616c0d 3957
b9771d41 3958 ieee80211_xmit(sdata, sta, skb, 0);
80616c0d 3959 }
2d981fdd
JB		 3960 goto out;
3961 out_free:
3962 kfree_skb(skb);
4c9451ed 3963 out:
55de908a 3964 rcu_read_unlock();
e2ebc74d
JB		 3965}
3966
ebceec86
MB		 3967static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3968{
3969 struct ethhdr *eth;
3970 int err;
3971
3972 err = skb_ensure_writable(skb, ETH_HLEN);
3973 if (unlikely(err))
3974 return err;
3975
3976 eth = (void *)skb->data;
3977 ether_addr_copy(eth->h_dest, sta->sta.addr);
3978
3979 return 0;
3980}
3981
3982static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3983 struct net_device *dev)
3984{
3985 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3986 const struct ethhdr *eth = (void *)skb->data;
3987 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3988 __be16 ethertype;
3989
3990 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3991 return false;
3992
3993 switch (sdata->vif.type) {
3994 case NL80211_IFTYPE_AP_VLAN:
3995 if (sdata->u.vlan.sta)
3996 return false;
3997 if (sdata->wdev.use_4addr)
3998 return false;
3999 /* fall through */
4000 case NL80211_IFTYPE_AP:
4001 /* check runtime toggle for this bss */
4002 if (!sdata->bss->multicast_to_unicast)
4003 return false;
4004 break;
4005 default:
4006 return false;
4007 }
4008
4009 /* multicast to unicast conversion only for some payload */
4010 ethertype = eth->h_proto;
4011 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4012 ethertype = ethvlan->h_vlan_encapsulated_proto;
4013 switch (ethertype) {
4014 case htons(ETH_P_ARP):
4015 case htons(ETH_P_IP):
4016 case htons(ETH_P_IPV6):
4017 break;
4018 default:
4019 return false;
4020 }
4021
4022 return true;
4023}
4024
4025static void
4026ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4027 struct sk_buff_head *queue)
4028{
4029 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4030 struct ieee80211_local *local = sdata->local;
4031 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4032 struct sta_info *sta, *first = NULL;
4033 struct sk_buff *cloned_skb;
4034
4035 rcu_read_lock();
4036
4037 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4038 if (sdata != sta->sdata)
4039 /* AP-VLAN mismatch */
4040 continue;
4041 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4042 /* do not send back to source */
4043 continue;
4044 if (!first) {
4045 first = sta;
4046 continue;
4047 }
4048 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4049 if (!cloned_skb)
4050 goto multicast;
4051 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4052 dev_kfree_skb(cloned_skb);
4053 goto multicast;
4054 }
4055 __skb_queue_tail(queue, cloned_skb);
4056 }
4057
4058 if (likely(first)) {
4059 if (unlikely(ieee80211_change_da(skb, first)))
4060 goto multicast;
4061 __skb_queue_tail(queue, skb);
4062 } else {
4063 /* no STA connected, drop */
4064 kfree_skb(skb);
4065 skb = NULL;
4066 }
4067
4068 goto out;
4069multicast:
4070 __skb_queue_purge(queue);
4071 __skb_queue_tail(queue, skb);
4072out:
4073 rcu_read_unlock();
4074}
4075
4c9451ed
JB		 4076/**
4077 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4078 * @skb: packet to be sent
4079 * @dev: incoming interface
4080 *
4081 * On failure skb will be freed.
4082 */
24d342c5
LK		 4083netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4084 struct net_device *dev)
4085{
ebceec86
MB		 4086 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4087 struct sk_buff_head queue;
4088
4089 __skb_queue_head_init(&queue);
4090 ieee80211_convert_to_unicast(skb, dev, &queue);
4091 while ((skb = __skb_dequeue(&queue)))
06016772 4092 __ieee80211_subif_start_xmit(skb, dev, 0, 0);
ebceec86 4093 } else {
06016772 4094 __ieee80211_subif_start_xmit(skb, dev, 0, 0);
ebceec86
MB		 4095 }
4096
24d342c5
LK		 4097 return NETDEV_TX_OK;
4098}
e2ebc74d 4099
7528ec57
JB		 4100struct sk_buff *
4101ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4102 struct sk_buff *skb, u32 info_flags)
4103{
4104 struct ieee80211_hdr *hdr;
4105 struct ieee80211_tx_data tx = {
4106 .local = sdata->local,
4107 .sdata = sdata,
4108 };
97ffe757 4109 struct sta_info *sta;
7528ec57
JB		 4110
4111 rcu_read_lock();
4112
97ffe757
JB		 4113 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4114 kfree_skb(skb);
4115 skb = ERR_PTR(-EINVAL);
4116 goto out;
4117 }
4118
06016772 4119 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0);
7528ec57
JB		 4120 if (IS_ERR(skb))
4121 goto out;
4122
4123 hdr = (void *)skb->data;
4124 tx.sta = sta_info_get(sdata, hdr->addr1);
4125 tx.skb = skb;
4126
4127 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4128 rcu_read_unlock();
4129 kfree_skb(skb);
4130 return ERR_PTR(-EINVAL);
4131 }
4132
4133out:
4134 rcu_read_unlock();
4135 return skb;
4136}
4137
e2530083
JB		 4138/*
4139 * ieee80211_clear_tx_pending may not be called in a context where
4140 * it is possible that it packets could come in again.
4141 */
e2ebc74d
JB		 4142void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4143{
1f98ab7f 4144 struct sk_buff *skb;
2de8e0d9 4145 int i;
e2ebc74d 4146
1f98ab7f
FF		 4147 for (i = 0; i < local->hw.queues; i++) {
4148 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4149 ieee80211_free_txskb(&local->hw, skb);
4150 }
e2ebc74d
JB		 4151}
4152
7bb45683
JB		 4153/*
4154 * Returns false if the frame couldn't be transmitted but was queued instead,
4155 * which in this case means re-queued -- take as an indication to stop sending
4156 * more pending frames.
4157 */
cd8ffc80
JB		 4158static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4159 struct sk_buff *skb)
4160{
4161 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4162 struct ieee80211_sub_if_data *sdata;
4163 struct sta_info *sta;
4164 struct ieee80211_hdr *hdr;
7bb45683 4165 bool result;
55de908a 4166 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 4167
5061b0c2 4168 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 4169
4170 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 4171 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4172 if (unlikely(!chanctx_conf)) {
4173 dev_kfree_skb(skb);
4174 return true;
4175 }
73c4e195 4176 info->band = chanctx_conf->def.chan->band;
b9771d41 4177 result = ieee80211_tx(sdata, NULL, skb, true, 0);
cd8ffc80 4178 } else {
252b86c4
JB		 4179 struct sk_buff_head skbs;
4180
4181 __skb_queue_head_init(&skbs);
4182 __skb_queue_tail(&skbs, skb);
4183
cd8ffc80 4184 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 4185 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 4186
74e4dbfd 4187 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 4188 }
4189
cd8ffc80
JB		 4190 return result;
4191}
4192
e2530083 4193/*
3b8d81e0 4194 * Transmit all pending packets. Called from tasklet.
e2530083 4195 */
e2ebc74d
JB		 4196void ieee80211_tx_pending(unsigned long data)
4197{
4198 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 4199 unsigned long flags;
cd8ffc80 4200 int i;
3b8d81e0 4201 bool txok;
e2ebc74d 4202
f0e72851 4203 rcu_read_lock();
e2530083 4204
3b8d81e0 4205 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 4206 for (i = 0; i < local->hw.queues; i++) {
4207 /*
4208 * If queue is stopped by something other than due to pending
4209 * frames, or we have no pending frames, proceed to next queue.
4210 */
3b8d81e0 4211 if (local->queue_stop_reasons[i] ||
2a577d98 4212 skb_queue_empty(&local->pending[i]))
e2ebc74d 4213 continue;
e2530083 4214
2a577d98 4215 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 4216 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 4217 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 4218
a7bc376c 4219 if (WARN_ON(!info->control.vif)) {
c3e7724b 4220 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 4221 continue;
4222 }
4223
3b8d81e0
JB		 4224 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4225 flags);
4226
4227 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 4228 spin_lock_irqsave(&local->queue_stop_reason_lock,
4229 flags);
4230 if (!txok)
2a577d98 4231 break;
e2ebc74d 4232 }
7236fe29
JB		 4233
4234 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 4235 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 4236 }
3b8d81e0 4237 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 4238
f0e72851 4239 rcu_read_unlock();
e2ebc74d
JB		 4240}
4241
4242/* functions for drivers to get certain frames */
4243
eac70c13 4244static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 4245 struct ps_data *ps, struct sk_buff *skb,
4246 bool is_template)
e2ebc74d
JB		 4247{
4248 u8 *pos, *tim;
4249 int aid0 = 0;
4250 int i, have_bits = 0, n1, n2;
4251
4252 /* Generate bitmap for TIM only if there are any STAs in power save
4253 * mode. */
d012a605 4254 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 4255 /* in the hope that this is faster than
4256 * checking byte-for-byte */
f359d3fe 4257 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 4258 IEEE80211_MAX_AID+1);
6ec8c332
AO		 4259 if (!is_template) {
4260 if (ps->dtim_count == 0)
4261 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
4262 else
4263 ps->dtim_count--;
4264 }
e2ebc74d 4265
4df864c1 4266 tim = pos = skb_put(skb, 6);
e2ebc74d
JB		 4267 *pos++ = WLAN_EID_TIM;
4268 *pos++ = 4;
d012a605 4269 *pos++ = ps->dtim_count;
8860020e 4270 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 4271
d012a605 4272 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 4273 aid0 = 1;
4274
d012a605 4275 ps->dtim_bc_mc = aid0 == 1;
512119b3 4276
e2ebc74d
JB		 4277 if (have_bits) {
4278 /* Find largest even number N1 so that bits numbered 1 through
4279 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4280 * (N2 + 1) x 8 through 2007 are 0. */
4281 n1 = 0;
4282 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 4283 if (ps->tim[i]) {
e2ebc74d
JB		 4284 n1 = i & 0xfe;
4285 break;
4286 }
4287 }
4288 n2 = n1;
4289 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 4290 if (ps->tim[i]) {
e2ebc74d
JB		 4291 n2 = i;
4292 break;
4293 }
4294 }
4295
4296 /* Bitmap control */
4297 *pos++ = n1 | aid0;
4298 /* Part Virt Bitmap */
5220da39 4299 skb_put(skb, n2 - n1);
d012a605 4300 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 4301
4302 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 4303 } else {
4304 *pos++ = aid0; /* Bitmap control */
4305 *pos++ = 0; /* Part Virt Bitmap */
4306 }
e2ebc74d
JB		 4307}
4308
eac70c13 4309static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 4310 struct ps_data *ps, struct sk_buff *skb,
4311 bool is_template)
eac70c13
MP		 4312{
4313 struct ieee80211_local *local = sdata->local;
4314
4315 /*
4316 * Not very nice, but we want to allow the driver to call
4317 * ieee80211_beacon_get() as a response to the set_tim()
4318 * callback. That, however, is already invoked under the
4319 * sta_lock to guarantee consistent and race-free update
4320 * of the tim bitmap in mac80211 and the driver.
4321 */
4322 if (local->tim_in_locked_section) {
6ec8c332 4323 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
eac70c13 4324 } else {
1b91731d 4325 spin_lock_bh(&local->tim_lock);
6ec8c332 4326 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
1b91731d 4327 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 4328 }
4329
4330 return 0;
4331}
4332
1af586c9
AO		 4333static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
4334 struct beacon_data *beacon)
73da7d5b
SW		 4335{
4336 struct probe_resp *resp;
cd7760e6
SW		 4337 u8 *beacon_data;
4338 size_t beacon_data_len;
0d06d9ba 4339 int i;
af296bdb 4340 u8 count = beacon->csa_current_counter;
cd7760e6
SW		 4341
4342 switch (sdata->vif.type) {
4343 case NL80211_IFTYPE_AP:
4344 beacon_data = beacon->tail;
4345 beacon_data_len = beacon->tail_len;
4346 break;
4347 case NL80211_IFTYPE_ADHOC:
4348 beacon_data = beacon->head;
4349 beacon_data_len = beacon->head_len;
4350 break;
b8456a14
CYY		 4351 case NL80211_IFTYPE_MESH_POINT:
4352 beacon_data = beacon->head;
4353 beacon_data_len = beacon->head_len;
4354 break;
cd7760e6
SW		 4355 default:
4356 return;
4357 }
73da7d5b 4358
af296bdb 4359 rcu_read_lock();
0d06d9ba 4360 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
af296bdb 4361 resp = rcu_dereference(sdata->u.ap.probe_resp);
0d06d9ba 4362
af296bdb
MK		 4363 if (beacon->csa_counter_offsets[i]) {
4364 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
4365 beacon_data_len)) {
0d06d9ba
AO		 4366 rcu_read_unlock();
4367 return;
4368 }
af296bdb
MK		 4369
4370 beacon_data[beacon->csa_counter_offsets[i]] = count;
73da7d5b 4371 }
af296bdb
MK		 4372
4373 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4374 resp->data[resp->csa_counter_offsets[i]] = count;
73da7d5b 4375 }
af296bdb 4376 rcu_read_unlock();
1af586c9
AO		 4377}
4378
e996ec2a
WD		 4379static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
4380{
4381 beacon->csa_current_counter--;
4382
4383 /* the counter should never reach 0 */
4384 WARN_ON_ONCE(!beacon->csa_current_counter);
4385
4386 return beacon->csa_current_counter;
4387}
4388
1af586c9
AO		 4389u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
4390{
4391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
af296bdb
MK		 4392 struct beacon_data *beacon = NULL;
4393 u8 count = 0;
0d06d9ba 4394
af296bdb
MK		 4395 rcu_read_lock();
4396
4397 if (sdata->vif.type == NL80211_IFTYPE_AP)
4398 beacon = rcu_dereference(sdata->u.ap.beacon);
4399 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4400 beacon = rcu_dereference(sdata->u.ibss.presp);
4401 else if (ieee80211_vif_is_mesh(&sdata->vif))
4402 beacon = rcu_dereference(sdata->u.mesh.beacon);
4403
4404 if (!beacon)
4405 goto unlock;
4406
e996ec2a 4407 count = __ieee80211_csa_update_counter(beacon);
1af586c9 4408
af296bdb
MK		 4409unlock:
4410 rcu_read_unlock();
4411 return count;
73da7d5b 4412}
1af586c9 4413EXPORT_SYMBOL(ieee80211_csa_update_counter);
73da7d5b 4414
03737001
GG		 4415void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter)
4416{
4417 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4418 struct beacon_data *beacon = NULL;
4419
4420 rcu_read_lock();
4421
4422 if (sdata->vif.type == NL80211_IFTYPE_AP)
4423 beacon = rcu_dereference(sdata->u.ap.beacon);
4424 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4425 beacon = rcu_dereference(sdata->u.ibss.presp);
4426 else if (ieee80211_vif_is_mesh(&sdata->vif))
4427 beacon = rcu_dereference(sdata->u.mesh.beacon);
4428
4429 if (!beacon)
4430 goto unlock;
4431
4432 if (counter < beacon->csa_current_counter)
4433 beacon->csa_current_counter = counter;
4434
4435unlock:
4436 rcu_read_unlock();
4437}
4438EXPORT_SYMBOL(ieee80211_csa_set_counter);
4439
73da7d5b
SW		 4440bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4441{
4442 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4443 struct beacon_data *beacon = NULL;
4444 u8 *beacon_data;
4445 size_t beacon_data_len;
73da7d5b
SW		 4446 int ret = false;
4447
4448 if (!ieee80211_sdata_running(sdata))
4449 return false;
4450
4451 rcu_read_lock();
4452 if (vif->type == NL80211_IFTYPE_AP) {
4453 struct ieee80211_if_ap *ap = &sdata->u.ap;
4454
4455 beacon = rcu_dereference(ap->beacon);
4456 if (WARN_ON(!beacon || !beacon->tail))
4457 goto out;
4458 beacon_data = beacon->tail;
4459 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 4460 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4461 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4462
4463 beacon = rcu_dereference(ifibss->presp);
4464 if (!beacon)
4465 goto out;
4466
b8456a14
CYY		 4467 beacon_data = beacon->head;
4468 beacon_data_len = beacon->head_len;
4469 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4470 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4471
4472 beacon = rcu_dereference(ifmsh->beacon);
4473 if (!beacon)
4474 goto out;
4475
cd7760e6
SW		 4476 beacon_data = beacon->head;
4477 beacon_data_len = beacon->head_len;
73da7d5b
SW		 4478 } else {
4479 WARN_ON(1);
4480 goto out;
4481 }
4482
10d78f27
MK		 4483 if (!beacon->csa_counter_offsets[0])
4484 goto out;
4485
af296bdb 4486 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 4487 goto out;
4488
af296bdb 4489 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
73da7d5b
SW		 4490 ret = true;
4491 out:
4492 rcu_read_unlock();
4493
4494 return ret;
4495}
4496EXPORT_SYMBOL(ieee80211_csa_is_complete);
4497
6ec8c332
AO		 4498static struct sk_buff *
4499__ieee80211_beacon_get(struct ieee80211_hw *hw,
4500 struct ieee80211_vif *vif,
4501 struct ieee80211_mutable_offsets *offs,
4502 bool is_template)
e2ebc74d
JB		 4503{
4504 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 4505 struct beacon_data *beacon = NULL;
9d139c81 4506 struct sk_buff *skb = NULL;
e039fa4a 4507 struct ieee80211_tx_info *info;
e2ebc74d 4508 struct ieee80211_sub_if_data *sdata = NULL;
57fbcce3 4509 enum nl80211_band band;
e00cfce0 4510 struct ieee80211_tx_rate_control txrc;
55de908a 4511 struct ieee80211_chanctx_conf *chanctx_conf;
1af586c9 4512 int csa_off_base = 0;
8318d78a 4513
5dfdaf58 4514 rcu_read_lock();
e2ebc74d 4515
32bfd35d 4516 sdata = vif_to_sdata(vif);
55de908a 4517 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 4518
55de908a 4519 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 4520 goto out;
4521
6ec8c332
AO		 4522 if (offs)
4523 memset(offs, 0, sizeof(*offs));
eddcbb94 4524
05c914fe 4525 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605 4526 struct ieee80211_if_ap *ap = &sdata->u.ap;
d012a605 4527
af296bdb 4528 beacon = rcu_dereference(ap->beacon);
3ad97fbc 4529 if (beacon) {
10d78f27 4530 if (beacon->csa_counter_offsets[0]) {
1af586c9 4531 if (!is_template)
e996ec2a 4532 __ieee80211_csa_update_counter(beacon);
1af586c9
AO		 4533
4534 ieee80211_set_csa(sdata, beacon);
4535 }
73da7d5b 4536
902acc78
JB		 4537 /*
4538 * headroom, head length,
4539 * tail length and maximum TIM length
4540 */
4541 skb = dev_alloc_skb(local->tx_headroom +
4542 beacon->head_len +
70dabeb7
FF		 4543 beacon->tail_len + 256 +
4544 local->hw.extra_beacon_tailroom);
902acc78
JB		 4545 if (!skb)
4546 goto out;
33b64eb2 4547
902acc78 4548 skb_reserve(skb, local->tx_headroom);
59ae1d12 4549 skb_put_data(skb, beacon->head, beacon->head_len);
33b64eb2 4550
6ec8c332
AO		 4551 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4552 is_template);
33b64eb2 4553
6ec8c332
AO		 4554 if (offs) {
4555 offs->tim_offset = beacon->head_len;
4556 offs->tim_length = skb->len - beacon->head_len;
1af586c9
AO		 4557
4558 /* for AP the csa offsets are from tail */
4559 csa_off_base = skb->len;
6ec8c332 4560 }
eddcbb94 4561
902acc78 4562 if (beacon->tail)
59ae1d12
JB		 4563 skb_put_data(skb, beacon->tail,
4564 beacon->tail_len);
9d139c81
JB		 4565 } else
4566 goto out;
05c914fe 4567 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 4568 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 4569 struct ieee80211_hdr *hdr;
33b64eb2 4570
af296bdb
MK		 4571 beacon = rcu_dereference(ifibss->presp);
4572 if (!beacon)
9d139c81
JB		 4573 goto out;
4574
10d78f27 4575 if (beacon->csa_counter_offsets[0]) {
1af586c9 4576 if (!is_template)
e996ec2a 4577 __ieee80211_csa_update_counter(beacon);
cd7760e6 4578
af296bdb 4579 ieee80211_set_csa(sdata, beacon);
1af586c9 4580 }
cd7760e6 4581
af296bdb 4582 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 4583 local->hw.extra_beacon_tailroom);
9d139c81
JB		 4584 if (!skb)
4585 goto out;
c3ffeab4 4586 skb_reserve(skb, local->tx_headroom);
59ae1d12 4587 skb_put_data(skb, beacon->head, beacon->head_len);
9d139c81
JB		 4588
4589 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 4590 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4591 IEEE80211_STYPE_BEACON);
902acc78 4592 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 4593 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 4594
af296bdb
MK		 4595 beacon = rcu_dereference(ifmsh->beacon);
4596 if (!beacon)
ac1bd846 4597 goto out;
ac1bd846 4598
10d78f27 4599 if (beacon->csa_counter_offsets[0]) {
1af586c9
AO		 4600 if (!is_template)
4601 /* TODO: For mesh csa_counter is in TU, so
4602 * decrementing it by one isn't correct, but
4603 * for now we leave it consistent with overall
4604 * mac80211's behavior.
4605 */
e996ec2a 4606 __ieee80211_csa_update_counter(beacon);
1af586c9 4607
af296bdb 4608 ieee80211_set_csa(sdata, beacon);
1af586c9 4609 }
b8456a14 4610
dbf498fb 4611 if (ifmsh->sync_ops)
445cd452 4612 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
dbf498fb 4613
3b69a9c5 4614 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 4615 beacon->head_len +
3f52b7e3 4616 256 + /* TIM IE */
af296bdb 4617 beacon->tail_len +
70dabeb7 4618 local->hw.extra_beacon_tailroom);
902acc78
JB		 4619 if (!skb)
4620 goto out;
2b5e1967 4621 skb_reserve(skb, local->tx_headroom);
59ae1d12 4622 skb_put_data(skb, beacon->head, beacon->head_len);
6ec8c332
AO		 4623 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4624
4625 if (offs) {
af296bdb
MK		 4626 offs->tim_offset = beacon->head_len;
4627 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 4628 }
4629
59ae1d12 4630 skb_put_data(skb, beacon->tail, beacon->tail_len);
9d139c81
JB		 4631 } else {
4632 WARN_ON(1);
5dfdaf58 4633 goto out;
e2ebc74d
JB		 4634 }
4635
1af586c9 4636 /* CSA offsets */
af296bdb 4637 if (offs && beacon) {
1af586c9
AO		 4638 int i;
4639
4640 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
af296bdb 4641 u16 csa_off = beacon->csa_counter_offsets[i];
1af586c9
AO		 4642
4643 if (!csa_off)
4644 continue;
4645
4646 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4647 }
4648 }
4649
4bf88530 4650 band = chanctx_conf->def.chan->band;
55de908a 4651
e039fa4a
JB		 4652 info = IEEE80211_SKB_CB(skb);
4653
3b8d81e0 4654 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 4655 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 4656 info->band = band;
e00cfce0
JM		 4657
4658 memset(&txrc, 0, sizeof(txrc));
4659 txrc.hw = hw;
e31583cd 4660 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 4661 txrc.bss_conf = &sdata->vif.bss_conf;
4662 txrc.skb = skb;
4663 txrc.reported_rate.idx = -1;
37eb0b16 4664 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
8f0729b1 4665 txrc.bss = true;
e00cfce0 4666 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 4667
4668 info->control.vif = vif;
f591fa5d 4669
a472e71b
JL		 4670 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4671 IEEE80211_TX_CTL_ASSIGN_SEQ |
4672 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 4673 out:
5dfdaf58 4674 rcu_read_unlock();
e2ebc74d 4675 return skb;
6ec8c332
AO		 4676
4677}
4678
4679struct sk_buff *
4680ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4681 struct ieee80211_vif *vif,
4682 struct ieee80211_mutable_offsets *offs)
4683{
4684 return __ieee80211_beacon_get(hw, vif, offs, true);
4685}
4686EXPORT_SYMBOL(ieee80211_beacon_get_template);
4687
4688struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4689 struct ieee80211_vif *vif,
4690 u16 *tim_offset, u16 *tim_length)
4691{
4692 struct ieee80211_mutable_offsets offs = {};
4693 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
35afa588
HS		 4694 struct sk_buff *copy;
4695 struct ieee80211_supported_band *sband;
4696 int shift;
4697
4698 if (!bcn)
4699 return bcn;
6ec8c332
AO		 4700
4701 if (tim_offset)
4702 *tim_offset = offs.tim_offset;
4703
4704 if (tim_length)
4705 *tim_length = offs.tim_length;
4706
35afa588
HS		 4707 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4708 !hw_to_local(hw)->monitors)
4709 return bcn;
4710
4711 /* send a copy to monitor interfaces */
4712 copy = skb_copy(bcn, GFP_ATOMIC);
4713 if (!copy)
4714 return bcn;
4715
4716 shift = ieee80211_vif_get_shift(vif);
21a8e9dd
MSS		 4717 sband = ieee80211_get_sband(vif_to_sdata(vif));
4718 if (!sband)
4719 return bcn;
4720
b7b2e8ca
JC		 4721 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false,
4722 NULL);
35afa588 4723
6ec8c332 4724 return bcn;
e2ebc74d 4725}
eddcbb94 4726EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 4727
02945821
AN		 4728struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4729 struct ieee80211_vif *vif)
4730{
4731 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 4732 struct sk_buff *skb = NULL;
4733 struct probe_resp *presp = NULL;
02945821
AN		 4734 struct ieee80211_hdr *hdr;
4735 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4736
4737 if (sdata->vif.type != NL80211_IFTYPE_AP)
4738 return NULL;
4739
4740 rcu_read_lock();
4741
4742 ap = &sdata->u.ap;
4743 presp = rcu_dereference(ap->probe_resp);
4744 if (!presp)
4745 goto out;
4746
aa7a0080 4747 skb = dev_alloc_skb(presp->len);
02945821
AN		 4748 if (!skb)
4749 goto out;
4750
59ae1d12 4751 skb_put_data(skb, presp->data, presp->len);
aa7a0080 4752
02945821
AN		 4753 hdr = (struct ieee80211_hdr *) skb->data;
4754 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4755
4756out:
4757 rcu_read_unlock();
4758 return skb;
4759}
4760EXPORT_SYMBOL(ieee80211_proberesp_get);
4761
7044cc56
KV		 4762struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4763 struct ieee80211_vif *vif)
4764{
4765 struct ieee80211_sub_if_data *sdata;
4766 struct ieee80211_if_managed *ifmgd;
4767 struct ieee80211_pspoll *pspoll;
4768 struct ieee80211_local *local;
4769 struct sk_buff *skb;
4770
4771 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4772 return NULL;
4773
4774 sdata = vif_to_sdata(vif);
4775 ifmgd = &sdata->u.mgd;
4776 local = sdata->local;
4777
4778 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 4779 if (!skb)
7044cc56 4780 return NULL;
d15b8459 4781
7044cc56
KV		 4782 skb_reserve(skb, local->hw.extra_tx_headroom);
4783
b080db58 4784 pspoll = skb_put_zero(skb, sizeof(*pspoll));
7044cc56
KV		 4785 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4786 IEEE80211_STYPE_PSPOLL);
4787 pspoll->aid = cpu_to_le16(ifmgd->aid);
4788
4789 /* aid in PS-Poll has its two MSBs each set to 1 */
4790 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4791
4792 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4793 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4794
4795 return skb;
4796}
4797EXPORT_SYMBOL(ieee80211_pspoll_get);
4798
4799struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
7b6ddeaf
JB		 4800 struct ieee80211_vif *vif,
4801 bool qos_ok)
7044cc56
KV		 4802{
4803 struct ieee80211_hdr_3addr *nullfunc;
4804 struct ieee80211_sub_if_data *sdata;
4805 struct ieee80211_if_managed *ifmgd;
4806 struct ieee80211_local *local;
4807 struct sk_buff *skb;
7b6ddeaf 4808 bool qos = false;
7044cc56
KV		 4809
4810 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4811 return NULL;
4812
4813 sdata = vif_to_sdata(vif);
4814 ifmgd = &sdata->u.mgd;
4815 local = sdata->local;
4816
7b6ddeaf
JB		 4817 if (qos_ok) {
4818 struct sta_info *sta;
4819
4820 rcu_read_lock();
4821 sta = sta_info_get(sdata, ifmgd->bssid);
4822 qos = sta && sta->sta.wme;
4823 rcu_read_unlock();
4824 }
4825
4826 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4827 sizeof(*nullfunc) + 2);
d15b8459 4828 if (!skb)
7044cc56 4829 return NULL;
d15b8459 4830
7044cc56
KV		 4831 skb_reserve(skb, local->hw.extra_tx_headroom);
4832
b080db58 4833 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
7044cc56
KV		 4834 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4835 IEEE80211_STYPE_NULLFUNC |
4836 IEEE80211_FCTL_TODS);
7b6ddeaf 4837 if (qos) {
e0ba7095 4838 __le16 qoshdr = cpu_to_le16(7);
7b6ddeaf
JB		 4839
4840 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
4841 IEEE80211_STYPE_NULLFUNC) !=
4842 IEEE80211_STYPE_QOS_NULLFUNC);
4843 nullfunc->frame_control |=
4844 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
4845 skb->priority = 7;
4846 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
e0ba7095 4847 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
7b6ddeaf
JB		 4848 }
4849
7044cc56
KV		 4850 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4851 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4852 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4853
4854 return skb;
4855}
4856EXPORT_SYMBOL(ieee80211_nullfunc_get);
4857
05e54ea6 4858struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 4859 const u8 *src_addr,
05e54ea6 4860 const u8 *ssid, size_t ssid_len,
b9a9ada1 4861 size_t tailroom)
05e54ea6 4862{
a344d677 4863 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 4864 struct ieee80211_hdr_3addr *hdr;
4865 struct sk_buff *skb;
4866 size_t ie_ssid_len;
4867 u8 *pos;
4868
05e54ea6
KV		 4869 ie_ssid_len = 2 + ssid_len;
4870
4871 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 4872 ie_ssid_len + tailroom);
d15b8459 4873 if (!skb)
05e54ea6 4874 return NULL;
05e54ea6
KV		 4875
4876 skb_reserve(skb, local->hw.extra_tx_headroom);
4877
b080db58 4878 hdr = skb_put_zero(skb, sizeof(*hdr));
05e54ea6
KV		 4879 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4880 IEEE80211_STYPE_PROBE_REQ);
e83e6541 4881 eth_broadcast_addr(hdr->addr1);
a344d677 4882 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 4883 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 4884
4885 pos = skb_put(skb, ie_ssid_len);
4886 *pos++ = WLAN_EID_SSID;
4887 *pos++ = ssid_len;
88c868c4 4888 if (ssid_len)
05e54ea6
KV		 4889 memcpy(pos, ssid, ssid_len);
4890 pos += ssid_len;
4891
05e54ea6
KV		 4892 return skb;
4893}
4894EXPORT_SYMBOL(ieee80211_probereq_get);
4895
32bfd35d 4896void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4897 const void *frame, size_t frame_len,
e039fa4a 4898 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4899 struct ieee80211_rts *rts)
4900{
4901 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4902
065e9605
HH		 4903 rts->frame_control =
4904 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 4905 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4906 frame_txctl);
e2ebc74d
JB		 4907 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4908 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4909}
4910EXPORT_SYMBOL(ieee80211_rts_get);
4911
32bfd35d 4912void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4913 const void *frame, size_t frame_len,
e039fa4a 4914 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4915 struct ieee80211_cts *cts)
4916{
4917 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4918
065e9605
HH		 4919 cts->frame_control =
4920 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 4921 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4922 frame_len, frame_txctl);
e2ebc74d
JB		 4923 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4924}
4925EXPORT_SYMBOL(ieee80211_ctstoself_get);
4926
4927struct sk_buff *
32bfd35d 4928ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 4929 struct ieee80211_vif *vif)
e2ebc74d
JB		 4930{
4931 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 4932 struct sk_buff *skb = NULL;
5cf121c3 4933 struct ieee80211_tx_data tx;
e2ebc74d 4934 struct ieee80211_sub_if_data *sdata;
d012a605 4935 struct ps_data *ps;
e039fa4a 4936 struct ieee80211_tx_info *info;
55de908a 4937 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 4938
32bfd35d 4939 sdata = vif_to_sdata(vif);
5dfdaf58 4940
5dfdaf58 4941 rcu_read_lock();
55de908a 4942 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 4943
d012a605
MP		 4944 if (!chanctx_conf)
4945 goto out;
4946
4947 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4948 struct beacon_data *beacon =
4949 rcu_dereference(sdata->u.ap.beacon);
4950
4951 if (!beacon || !beacon->head)
4952 goto out;
4953
4954 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 4955 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4956 ps = &sdata->u.mesh.ps;
d012a605 4957 } else {
747cf5e9 4958 goto out;
d012a605 4959 }
5dfdaf58 4960
d012a605 4961 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 4962 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 4963
e2ebc74d 4964 while (1) {
d012a605 4965 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 4966 if (!skb)
747cf5e9 4967 goto out;
e2ebc74d
JB		 4968 local->total_ps_buffered--;
4969
d012a605 4970 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 4971 struct ieee80211_hdr *hdr =
4972 (struct ieee80211_hdr *) skb->data;
4973 /* more buffered multicast/broadcast frames ==> set
4974 * MoreData flag in IEEE 802.11 header to inform PS
4975 * STAs */
4976 hdr->frame_control |=
4977 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4978 }
4979
112c44b2 4980 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 4981 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 4982 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 4983 break;
6b07d9ca 4984 ieee80211_free_txskb(hw, skb);
e2ebc74d 4985 }
e039fa4a
JB		 4986
4987 info = IEEE80211_SKB_CB(skb);
4988
5cf121c3 4989 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 4990 info->band = chanctx_conf->def.chan->band;
e2ebc74d 4991
97b045d6 4992 if (invoke_tx_handlers(&tx))
e2ebc74d 4993 skb = NULL;
97b045d6 4994 out:
d0709a65 4995 rcu_read_unlock();
e2ebc74d
JB		 4996
4997 return skb;
4998}
4999EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 5000
b6da911b
LK		 5001int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5002{
5003 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5004 struct ieee80211_sub_if_data *sdata = sta->sdata;
5005 struct ieee80211_local *local = sdata->local;
5006 int ret;
5007 u32 queues;
5008
5009 lockdep_assert_held(&local->sta_mtx);
5010
5011 /* only some cases are supported right now */
5012 switch (sdata->vif.type) {
5013 case NL80211_IFTYPE_STATION:
5014 case NL80211_IFTYPE_AP:
5015 case NL80211_IFTYPE_AP_VLAN:
5016 break;
5017 default:
5018 WARN_ON(1);
5019 return -EINVAL;
5020 }
5021
5022 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5023 return -EINVAL;
5024
5025 if (sta->reserved_tid == tid) {
5026 ret = 0;
5027 goto out;
5028 }
5029
5030 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5031 sdata_err(sdata, "TID reservation already active\n");
5032 ret = -EALREADY;
5033 goto out;
5034 }
5035
5036 ieee80211_stop_vif_queues(sdata->local, sdata,
5037 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5038
5039 synchronize_net();
5040
5041 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 5042 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 5043 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
5044 __ieee80211_stop_tx_ba_session(sta, tid,
5045 AGG_STOP_LOCAL_REQUEST);
5046 }
5047
5048 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 5049 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 5050
5051 sta->reserved_tid = tid;
5052
5053 ieee80211_wake_vif_queues(local, sdata,
5054 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5055
30686bf7 5056 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 5057 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
5058
5059 ret = 0;
5060 out:
5061 return ret;
5062}
5063EXPORT_SYMBOL(ieee80211_reserve_tid);
5064
5065void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5066{
5067 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5068 struct ieee80211_sub_if_data *sdata = sta->sdata;
5069
5070 lockdep_assert_held(&sdata->local->sta_mtx);
5071
5072 /* only some cases are supported right now */
5073 switch (sdata->vif.type) {
5074 case NL80211_IFTYPE_STATION:
5075 case NL80211_IFTYPE_AP:
5076 case NL80211_IFTYPE_AP_VLAN:
5077 break;
5078 default:
5079 WARN_ON(1);
5080 return;
5081 }
5082
5083 if (tid != sta->reserved_tid) {
5084 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
5085 return;
5086 }
5087
5088 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
5089}
5090EXPORT_SYMBOL(ieee80211_unreserve_tid);
5091
55de908a
JB		 5092void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
5093 struct sk_buff *skb, int tid,
b9771d41 5094 enum nl80211_band band, u32 txdata_flags)
3b8d81e0 5095{
731977e9 5096 int ac = ieee80211_ac_from_tid(tid);
3a25a8c8 5097
d57a544d 5098 skb_reset_mac_header(skb);
3a25a8c8 5099 skb_set_queue_mapping(skb, ac);
cf6bb79a 5100 skb->priority = tid;
cf0277e7 5101
89afe614
JB		 5102 skb->dev = sdata->dev;
5103
3d34deb6
JB		 5104 /*
5105 * The other path calling ieee80211_xmit is from the tasklet,
5106 * and while we can handle concurrent transmissions locking
5107 * requirements are that we do not come into tx with bhs on.
5108 */
5109 local_bh_disable();
73c4e195 5110 IEEE80211_SKB_CB(skb)->band = band;
b9771d41 5111 ieee80211_xmit(sdata, NULL, skb, txdata_flags);
3d34deb6 5112 local_bh_enable();
3b8d81e0 5113}
91180649
DK		 5114
5115int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
5116 const u8 *buf, size_t len,
5117 const u8 *dest, __be16 proto, bool unencrypted)
5118{
5119 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5120 struct ieee80211_local *local = sdata->local;
5121 struct sk_buff *skb;
5122 struct ethhdr *ehdr;
5123 u32 flags;
5124
5125 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
5126 * or Pre-Authentication
5127 */
5128 if (proto != sdata->control_port_protocol &&
5129 proto != cpu_to_be16(ETH_P_PREAUTH))
5130 return -EINVAL;
5131
5132 if (unencrypted)
5133 flags = IEEE80211_TX_INTFL_DONT_ENCRYPT;
5134 else
5135 flags = 0;
5136
5137 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5138 sizeof(struct ethhdr) + len);
5139 if (!skb)
5140 return -ENOMEM;
5141
5142 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
5143
5144 skb_put_data(skb, buf, len);
5145
5146 ehdr = skb_push(skb, sizeof(struct ethhdr));
5147 memcpy(ehdr->h_dest, dest, ETH_ALEN);
5148 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
5149 ehdr->h_proto = proto;
5150
5151 skb->dev = dev;
5152 skb->protocol = htons(ETH_P_802_3);
5153 skb_reset_network_header(skb);
5154 skb_reset_mac_header(skb);
5155
e7441c92 5156 local_bh_disable();
06016772 5157 __ieee80211_subif_start_xmit(skb, skb->dev, flags, 0);
e7441c92 5158 local_bh_enable();
91180649
DK		 5159
5160 return 0;
5161}
8828f81a
RM		 5162
5163int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
5164 const u8 *buf, size_t len)
5165{
5166 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
5167 struct ieee80211_local *local = sdata->local;
5168 struct sk_buff *skb;
5169
5170 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
5171 30 + /* header size */
5172 18); /* 11s header size */
5173 if (!skb)
5174 return -ENOMEM;
5175
5176 skb_reserve(skb, local->hw.extra_tx_headroom);
5177 skb_put_data(skb, buf, len);
5178
5179 skb->dev = dev;
5180 skb->protocol = htons(ETH_P_802_3);
5181 skb_reset_network_header(skb);
5182 skb_reset_mac_header(skb);
5183
5184 local_bh_disable();
5185 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
5186 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP);
e7441c92 5187 local_bh_enable();
91180649
DK		 5188
5189 return 0;
5190}
Linux 6.x block layer and io_uring tree(s)