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Merge remote-tracking branch 'mfd/for-mfd-next'
[deliverable/linux.git] / net / mac80211 / tx.c
CommitLineData
e2ebc74d
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
d98ad83e 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
e2ebc74d
JB		 7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 *
13 * Transmit and frame generation functions.
14 */
15
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/bitmap.h>
d4e46a3d 21#include <linux/rcupdate.h>
bc3b2d7f 22#include <linux/export.h>
881d966b 23#include <net/net_namespace.h>
e2ebc74d
JB		 24#include <net/ieee80211_radiotap.h>
25#include <net/cfg80211.h>
26#include <net/mac80211.h>
5caa328e
MK		 27#include <net/codel.h>
28#include <net/codel_impl.h>
e2ebc74d 29#include <asm/unaligned.h>
fa962b92 30#include <net/fq_impl.h>
e2ebc74d
JB		 31
32#include "ieee80211_i.h"
24487981 33#include "driver-ops.h"
2c8dccc7 34#include "led.h"
33b64eb2 35#include "mesh.h"
e2ebc74d
JB		 36#include "wep.h"
37#include "wpa.h"
38#include "wme.h"
2c8dccc7 39#include "rate.h"
e2ebc74d 40
e2ebc74d
JB		 41/* misc utils */
42
5a490510
JB		 43static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
44{
45 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
46
47 u64_stats_update_begin(&tstats->syncp);
48 tstats->tx_packets++;
49 tstats->tx_bytes += len;
50 u64_stats_update_end(&tstats->syncp);
51}
52
252b86c4
JB		 53static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
54 struct sk_buff *skb, int group_addr,
03f93c3d 55 int next_frag_len)
e2ebc74d 56{
2103dec1 57 int rate, mrate, erp, dur, i, shift = 0;
2e92e6f2 58 struct ieee80211_rate *txrate;
e2ebc74d 59 struct ieee80211_local *local = tx->local;
8318d78a 60 struct ieee80211_supported_band *sband;
358c8d9d 61 struct ieee80211_hdr *hdr;
252b86c4 62 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2103dec1
SW		 63 struct ieee80211_chanctx_conf *chanctx_conf;
64 u32 rate_flags = 0;
65
66 rcu_read_lock();
67 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
68 if (chanctx_conf) {
69 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
70 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
71 }
72 rcu_read_unlock();
e6a9854b
JB		 73
74 /* assume HW handles this */
336004e2 75 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
e6a9854b
JB		 76 return 0;
77
78 /* uh huh? */
0d528d85 79 if (WARN_ON_ONCE(tx->rate.idx < 0))
e6a9854b 80 return 0;
e2ebc74d 81
2d56577b 82 sband = local->hw.wiphy->bands[info->band];
0d528d85 83 txrate = &sband->bitrates[tx->rate.idx];
8318d78a 84
e6a9854b 85 erp = txrate->flags & IEEE80211_RATE_ERP_G;
e2ebc74d
JB		 86
87 /*
88 * data and mgmt (except PS Poll):
89 * - during CFP: 32768
90 * - during contention period:
91 * if addr1 is group address: 0
92 * if more fragments = 0 and addr1 is individual address: time to
93 * transmit one ACK plus SIFS
94 * if more fragments = 1 and addr1 is individual address: time to
95 * transmit next fragment plus 2 x ACK plus 3 x SIFS
96 *
97 * IEEE 802.11, 9.6:
98 * - control response frame (CTS or ACK) shall be transmitted using the
99 * same rate as the immediately previous frame in the frame exchange
100 * sequence, if this rate belongs to the PHY mandatory rates, or else
101 * at the highest possible rate belonging to the PHY rates in the
102 * BSSBasicRateSet
103 */
252b86c4 104 hdr = (struct ieee80211_hdr *)skb->data;
358c8d9d 105 if (ieee80211_is_ctl(hdr->frame_control)) {
e2ebc74d 106 /* TODO: These control frames are not currently sent by
ccd7b362 107 * mac80211, but should they be implemented, this function
e2ebc74d
JB		 108 * needs to be updated to support duration field calculation.
109 *
110 * RTS: time needed to transmit pending data/mgmt frame plus
111 * one CTS frame plus one ACK frame plus 3 x SIFS
112 * CTS: duration of immediately previous RTS minus time
113 * required to transmit CTS and its SIFS
114 * ACK: 0 if immediately previous directed data/mgmt had
115 * more=0, with more=1 duration in ACK frame is duration
116 * from previous frame minus time needed to transmit ACK
117 * and its SIFS
118 * PS Poll: BIT(15) | BIT(14) | aid
119 */
120 return 0;
121 }
122
123 /* data/mgmt */
124 if (0 /* FIX: data/mgmt during CFP */)
03f93c3d 125 return cpu_to_le16(32768);
e2ebc74d
JB		 126
127 if (group_addr) /* Group address as the destination - no ACK */
128 return 0;
129
130 /* Individual destination address:
131 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
132 * CTS and ACK frames shall be transmitted using the highest rate in
133 * basic rate set that is less than or equal to the rate of the
134 * immediately previous frame and that is using the same modulation
135 * (CCK or OFDM). If no basic rate set matches with these requirements,
136 * the highest mandatory rate of the PHY that is less than or equal to
137 * the rate of the previous frame is used.
138 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
139 */
140 rate = -1;
8318d78a
JB		 141 /* use lowest available if everything fails */
142 mrate = sband->bitrates[0].bitrate;
143 for (i = 0; i < sband->n_bitrates; i++) {
144 struct ieee80211_rate *r = &sband->bitrates[i];
e2ebc74d 145
8318d78a
JB		 146 if (r->bitrate > txrate->bitrate)
147 break;
e2ebc74d 148
2103dec1
SW		 149 if ((rate_flags & r->flags) != rate_flags)
150 continue;
151
bda3933a 152 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
2103dec1 153 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
8318d78a
JB		 154
155 switch (sband->band) {
57fbcce3 156 case NL80211_BAND_2GHZ: {
8318d78a
JB		 157 u32 flag;
158 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
159 flag = IEEE80211_RATE_MANDATORY_G;
160 else
161 flag = IEEE80211_RATE_MANDATORY_B;
162 if (r->flags & flag)
163 mrate = r->bitrate;
164 break;
165 }
57fbcce3 166 case NL80211_BAND_5GHZ:
8318d78a
JB		 167 if (r->flags & IEEE80211_RATE_MANDATORY_A)
168 mrate = r->bitrate;
169 break;
57fbcce3 170 case NL80211_BAND_60GHZ:
3a0c52a6 171 /* TODO, for now fall through */
57fbcce3 172 case NUM_NL80211_BANDS:
8318d78a
JB		 173 WARN_ON(1);
174 break;
175 }
e2ebc74d
JB		 176 }
177 if (rate == -1) {
178 /* No matching basic rate found; use highest suitable mandatory
179 * PHY rate */
2103dec1 180 rate = DIV_ROUND_UP(mrate, 1 << shift);
e2ebc74d
JB		 181 }
182
6674f210
SW		 183 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
184 if (ieee80211_is_data_qos(hdr->frame_control) &&
c26a0e10 185 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
6674f210
SW		 186 dur = 0;
187 else
188 /* Time needed to transmit ACK
189 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
190 * to closest integer */
4ee73f33 191 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
438b61b7
SW		 192 tx->sdata->vif.bss_conf.use_short_preamble,
193 shift);
e2ebc74d
JB		 194
195 if (next_frag_len) {
196 /* Frame is fragmented: duration increases with time needed to
197 * transmit next fragment plus ACK and 2 x SIFS. */
198 dur *= 2; /* ACK + SIFS */
199 /* next fragment */
4ee73f33 200 dur += ieee80211_frame_duration(sband->band, next_frag_len,
8318d78a 201 txrate->bitrate, erp,
438b61b7
SW		 202 tx->sdata->vif.bss_conf.use_short_preamble,
203 shift);
e2ebc74d
JB		 204 }
205
03f93c3d 206 return cpu_to_le16(dur);
e2ebc74d
JB		 207}
208
e2ebc74d 209/* tx handlers */
5c1b98a5
KV		 210static ieee80211_tx_result debug_noinline
211ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
212{
213 struct ieee80211_local *local = tx->local;
0c74211d 214 struct ieee80211_if_managed *ifmgd;
5c1b98a5
KV		 215
216 /* driver doesn't support power save */
30686bf7 217 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
5c1b98a5
KV		 218 return TX_CONTINUE;
219
220 /* hardware does dynamic power save */
30686bf7 221 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
5c1b98a5
KV		 222 return TX_CONTINUE;
223
224 /* dynamic power save disabled */
225 if (local->hw.conf.dynamic_ps_timeout <= 0)
226 return TX_CONTINUE;
227
228 /* we are scanning, don't enable power save */
229 if (local->scanning)
230 return TX_CONTINUE;
231
232 if (!local->ps_sdata)
233 return TX_CONTINUE;
234
235 /* No point if we're going to suspend */
236 if (local->quiescing)
237 return TX_CONTINUE;
238
0c74211d
KV		 239 /* dynamic ps is supported only in managed mode */
240 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
241 return TX_CONTINUE;
242
243 ifmgd = &tx->sdata->u.mgd;
244
245 /*
246 * Don't wakeup from power save if u-apsd is enabled, voip ac has
247 * u-apsd enabled and the frame is in voip class. This effectively
248 * means that even if all access categories have u-apsd enabled, in
249 * practise u-apsd is only used with the voip ac. This is a
250 * workaround for the case when received voip class packets do not
251 * have correct qos tag for some reason, due the network or the
252 * peer application.
253 *
dc41e4d4 254 * Note: ifmgd->uapsd_queues access is racy here. If the value is
0c74211d
KV		 255 * changed via debugfs, user needs to reassociate manually to have
256 * everything in sync.
257 */
4875d30d
JB		 258 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
259 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
260 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
0c74211d
KV		 261 return TX_CONTINUE;
262
5c1b98a5
KV		 263 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
264 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 265 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 266 IEEE80211_QUEUE_STOP_REASON_PS,
267 false);
db28569a 268 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
5c1b98a5
KV		 269 ieee80211_queue_work(&local->hw,
270 &local->dynamic_ps_disable_work);
271 }
272
5db1c07c
LC		 273 /* Don't restart the timer if we're not disassociated */
274 if (!ifmgd->associated)
275 return TX_CONTINUE;
276
5c1b98a5
KV		 277 mod_timer(&local->dynamic_ps_timer, jiffies +
278 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
279
280 return TX_CONTINUE;
281}
e2ebc74d 282
d9e8a70f 283static ieee80211_tx_result debug_noinline
5cf121c3 284ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
e2ebc74d 285{
358c8d9d 286
e039fa4a 287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
e039fa4a 288 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
c2c98fde 289 bool assoc = false;
e2ebc74d 290
e039fa4a 291 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
9ae54c84 292 return TX_CONTINUE;
58d4185e 293
b23b025f
BG		 294 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
295 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
a9a6ffff
KV		 296 !ieee80211_is_probe_req(hdr->frame_control) &&
297 !ieee80211_is_nullfunc(hdr->frame_control))
298 /*
299 * When software scanning only nullfunc frames (to notify
300 * the sleep state to the AP) and probe requests (for the
301 * active scan) are allowed, all other frames should not be
302 * sent and we should not get here, but if we do
303 * nonetheless, drop them to avoid sending them
304 * off-channel. See the link below and
305 * ieee80211_start_scan() for more.
306 *
307 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
308 */
9ae54c84 309 return TX_DROP;
e2ebc74d 310
239281f8
RL		 311 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
312 return TX_CONTINUE;
313
1be7fe8d
BJ		 314 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
315 return TX_CONTINUE;
316
5cf121c3 317 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
9ae54c84 318 return TX_CONTINUE;
e2ebc74d 319
c2c98fde
JB		 320 if (tx->sta)
321 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
e2ebc74d 322
5cf121c3 323 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
c2c98fde 324 if (unlikely(!assoc &&
358c8d9d 325 ieee80211_is_data(hdr->frame_control))) {
e2ebc74d 326#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0
JB		 327 sdata_info(tx->sdata,
328 "dropped data frame to not associated station %pM\n",
329 hdr->addr1);
330#endif
e2ebc74d 331 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
9ae54c84 332 return TX_DROP;
e2ebc74d 333 }
29623892
JB		 334 } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
335 ieee80211_is_data(hdr->frame_control) &&
030ef8f8 336 !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
29623892
JB		 337 /*
338 * No associated STAs - no need to send multicast
339 * frames.
340 */
341 return TX_DROP;
e2ebc74d
JB		 342 }
343
9ae54c84 344 return TX_CONTINUE;
e2ebc74d
JB		 345}
346
e2ebc74d
JB		 347/* This function is called whenever the AP is about to exceed the maximum limit
348 * of buffered frames for power saving STAs. This situation should not really
349 * happen often during normal operation, so dropping the oldest buffered packet
350 * from each queue should be OK to make some room for new frames. */
351static void purge_old_ps_buffers(struct ieee80211_local *local)
352{
353 int total = 0, purged = 0;
354 struct sk_buff *skb;
355 struct ieee80211_sub_if_data *sdata;
356 struct sta_info *sta;
357
79010420 358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 359 struct ps_data *ps;
360
361 if (sdata->vif.type == NL80211_IFTYPE_AP)
362 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 363 else if (ieee80211_vif_is_mesh(&sdata->vif))
364 ps = &sdata->u.mesh.ps;
d012a605 365 else
e2ebc74d 366 continue;
d012a605
MP		 367
368 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 369 if (skb) {
370 purged++;
6b07d9ca 371 ieee80211_free_txskb(&local->hw, skb);
e2ebc74d 372 }
d012a605 373 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 374 }
e2ebc74d 375
948d887d
JB		 376 /*
377 * Drop one frame from each station from the lowest-priority
378 * AC that has frames at all.
379 */
d0709a65 380 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 381 int ac;
382
383 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
384 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
385 total += skb_queue_len(&sta->ps_tx_buf[ac]);
386 if (skb) {
387 purged++;
c3e7724b 388 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 389 break;
390 }
e2ebc74d 391 }
e2ebc74d 392 }
d0709a65 393
e2ebc74d 394 local->total_ps_buffered = total;
bdcbd8e0 395 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 396}
397
9ae54c84 398static ieee80211_tx_result
5cf121c3 399ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 400{
e039fa4a 401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 403 struct ps_data *ps;
e039fa4a 404
7d54d0dd
JB		 405 /*
406 * broadcast/multicast frame
407 *
3f52b7e3 408 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 409 * the frame is buffered to be sent after DTIM beacon frame.
410 * This is done either by the hardware or us.
411 */
412
3f52b7e3 413 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 414 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
415 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
416 if (!tx->sdata->bss)
417 return TX_CONTINUE;
418
419 ps = &tx->sdata->bss->ps;
3f52b7e3
MP		 420 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
421 ps = &tx->sdata->u.mesh.ps;
d012a605 422 } else {
3e122be0 423 return TX_CONTINUE;
d012a605
MP		 424 }
425
3e122be0
JB		 426
427 /* no buffering for ordered frames */
358c8d9d 428 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 429 return TX_CONTINUE;
7d54d0dd 430
08b99399
JB		 431 if (ieee80211_is_probe_req(hdr->frame_control))
432 return TX_CONTINUE;
433
30686bf7 434 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
f4d57941
JB		 435 info->hw_queue = tx->sdata->vif.cab_queue;
436
7d54d0dd 437 /* no stations in PS mode */
d012a605 438 if (!atomic_read(&ps->num_sta_ps))
9ae54c84 439 return TX_CONTINUE;
7d54d0dd 440
62b517cb 441 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
62b1208e 442
62b517cb 443 /* device releases frame after DTIM beacon */
30686bf7 444 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
62b1208e 445 return TX_CONTINUE;
62b1208e 446
7d54d0dd 447 /* buffered in mac80211 */
62b1208e
JB		 448 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
449 purge_old_ps_buffers(tx->local);
450
d012a605 451 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 452 ps_dbg(tx->sdata,
453 "BC TX buffer full - dropping the oldest frame\n");
6b07d9ca 454 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
62b1208e
JB		 455 } else
456 tx->local->total_ps_buffered++;
e2ebc74d 457
d012a605 458 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 459
62b1208e 460 return TX_QUEUED;
e2ebc74d
JB		 461}
462
fb733336
JM		 463static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
464 struct sk_buff *skb)
465{
466 if (!ieee80211_is_mgmt(fc))
467 return 0;
468
c2c98fde 469 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 470 return 0;
471
d8ca16db 472 if (!ieee80211_is_robust_mgmt_frame(skb))
fb733336
JM		 473 return 0;
474
475 return 1;
476}
477
9ae54c84 478static ieee80211_tx_result
5cf121c3 479ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 480{
481 struct sta_info *sta = tx->sta;
e039fa4a 482 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
08b99399 483 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 484 struct ieee80211_local *local = tx->local;
e2ebc74d 485
02f2f1a9 486 if (unlikely(!sta))
9ae54c84 487 return TX_CONTINUE;
e2ebc74d 488
c2c98fde 489 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
5ac2e350
JB		 490 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
491 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
02f2f1a9 492 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 493 int ac = skb_get_queue_mapping(tx->skb);
494
08b99399
JB		 495 if (ieee80211_is_mgmt(hdr->frame_control) &&
496 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
497 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
498 return TX_CONTINUE;
499 }
500
bdcbd8e0
JB		 501 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
502 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 503 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
504 purge_old_ps_buffers(tx->local);
1d147bfa
EG		 505
506 /* sync with ieee80211_sta_ps_deliver_wakeup */
507 spin_lock(&sta->ps_lock);
508 /*
509 * STA woke up the meantime and all the frames on ps_tx_buf have
510 * been queued to pending queue. No reordering can happen, go
511 * ahead and Tx the packet.
512 */
513 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
5ac2e350
JB		 514 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
515 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
1d147bfa
EG		 516 spin_unlock(&sta->ps_lock);
517 return TX_CONTINUE;
518 }
519
948d887d
JB		 520 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
521 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
bdcbd8e0
JB		 522 ps_dbg(tx->sdata,
523 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
524 sta->sta.addr, ac);
c3e7724b 525 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 526 } else
527 tx->local->total_ps_buffered++;
004c872e 528
e039fa4a 529 info->control.jiffies = jiffies;
5061b0c2 530 info->control.vif = &tx->sdata->vif;
8f77f384 531 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
03c8c06f 532 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
948d887d 533 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
1d147bfa 534 spin_unlock(&sta->ps_lock);
3393a608
JO		 535
536 if (!timer_pending(&local->sta_cleanup))
537 mod_timer(&local->sta_cleanup,
538 round_jiffies(jiffies +
539 STA_INFO_CLEANUP_INTERVAL));
540
c868cb35
JB		 541 /*
542 * We queued up some frames, so the TIM bit might
543 * need to be set, recalculate it.
544 */
545 sta_info_recalc_tim(sta);
546
9ae54c84 547 return TX_QUEUED;
bdcbd8e0
JB		 548 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
549 ps_dbg(tx->sdata,
550 "STA %pM in PS mode, but polling/in SP -> send frame\n",
551 sta->sta.addr);
e2ebc74d 552 }
e2ebc74d 553
9ae54c84 554 return TX_CONTINUE;
e2ebc74d
JB		 555}
556
d9e8a70f 557static ieee80211_tx_result debug_noinline
5cf121c3 558ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 559{
5cf121c3 560 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 561 return TX_CONTINUE;
e2ebc74d 562
5cf121c3 563 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 564 return ieee80211_tx_h_unicast_ps_buf(tx);
565 else
566 return ieee80211_tx_h_multicast_ps_buf(tx);
567}
568
a621fa4d
JB		 569static ieee80211_tx_result debug_noinline
570ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
571{
572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
573
af61a165
JB		 574 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
575 if (tx->sdata->control_port_no_encrypt)
576 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
577 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
9c1c98a3 578 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
af61a165 579 }
a621fa4d
JB		 580
581 return TX_CONTINUE;
582}
583
d9e8a70f 584static ieee80211_tx_result debug_noinline
5cf121c3 585ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 586{
46e6de15 587 struct ieee80211_key *key;
e039fa4a 588 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 589 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 590
3b8d81e0 591 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
e2ebc74d 592 tx->key = NULL;
2475b1cc
MS		 593 else if (tx->sta &&
594 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
d4e46a3d 595 tx->key = key;
46f6b060
MH		 596 else if (ieee80211_is_group_privacy_action(tx->skb) &&
597 (key = rcu_dereference(tx->sdata->default_multicast_key)))
598 tx->key = key;
3cfcf6ac 599 else if (ieee80211_is_mgmt(hdr->frame_control) &&
ecbcd324 600 is_multicast_ether_addr(hdr->addr1) &&
d8ca16db 601 ieee80211_is_robust_mgmt_frame(tx->skb) &&
3cfcf6ac
JM		 602 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
603 tx->key = key;
f7e0104c
JB		 604 else if (is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_multicast_key)))
606 tx->key = key;
607 else if (!is_multicast_ether_addr(hdr->addr1) &&
608 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 609 tx->key = key;
e8f4fb7c 610 else
4922f71f 611 tx->key = NULL;
e2ebc74d
JB		 612
613 if (tx->key) {
813d7669
JB		 614 bool skip_hw = false;
615
011bfcc4 616 /* TODO: add threshold stuff again */
176e4f84 617
97359d12
JB		 618 switch (tx->key->conf.cipher) {
619 case WLAN_CIPHER_SUITE_WEP40:
620 case WLAN_CIPHER_SUITE_WEP104:
97359d12 621 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 622 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 623 tx->key = NULL;
624 break;
97359d12 625 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db 626 case WLAN_CIPHER_SUITE_CCMP_256:
00b9cfa3
JM		 627 case WLAN_CIPHER_SUITE_GCMP:
628 case WLAN_CIPHER_SUITE_GCMP_256:
fb733336
JM		 629 if (!ieee80211_is_data_present(hdr->frame_control) &&
630 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
46f6b060
MH		 631 tx->skb) &&
632 !ieee80211_is_group_privacy_action(tx->skb))
fb733336 633 tx->key = NULL;
3b43a187
KV		 634 else
635 skip_hw = (tx->key->conf.flags &
e548c49e 636 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 637 ieee80211_is_mgmt(hdr->frame_control);
fb733336 638 break;
97359d12 639 case WLAN_CIPHER_SUITE_AES_CMAC:
56c52da2 640 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
8ade538b
JM		 641 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
642 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3cfcf6ac
JM		 643 if (!ieee80211_is_mgmt(hdr->frame_control))
644 tx->key = NULL;
645 break;
176e4f84 646 }
813d7669 647
e54faf29
JB		 648 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
649 !ieee80211_is_deauth(hdr->frame_control)))
95acac61
JB		 650 return TX_DROP;
651
f12553eb 652 if (!skip_hw && tx->key &&
382b1655 653 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 654 info->control.hw_key = &tx->key->conf;
e2ebc74d
JB		 655 }
656
9ae54c84 657 return TX_CONTINUE;
e2ebc74d
JB		 658}
659
d9e8a70f 660static ieee80211_tx_result debug_noinline
5cf121c3 661ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 662{
e039fa4a 663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 664 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
665 struct ieee80211_supported_band *sband;
a2c40249 666 u32 len;
e6a9854b 667 struct ieee80211_tx_rate_control txrc;
0d528d85 668 struct ieee80211_sta_rates *ratetbl = NULL;
c2c98fde 669 bool assoc = false;
8318d78a 670
e6a9854b 671 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 672
2d56577b 673 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 674
a2c40249 675 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 676 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 677
678 /* set up the tx rate control struct we give the RC algo */
005e472b 679 txrc.hw = &tx->local->hw;
e6a9854b
JB		 680 txrc.sband = sband;
681 txrc.bss_conf = &tx->sdata->vif.bss_conf;
682 txrc.skb = tx->skb;
683 txrc.reported_rate.idx = -1;
2d56577b 684 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
37eb0b16
JM		 685 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
686 txrc.max_rate_idx = -1;
687 else
688 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
2ffbe6d3
FF		 689
690 if (tx->sdata->rc_has_mcs_mask[info->band])
691 txrc.rate_idx_mcs_mask =
692 tx->sdata->rc_rateidx_mcs_mask[info->band];
693
8f0729b1 694 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 695 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 696 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
697 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 698
699 /* set up RTS protection if desired */
b9a5f8ca 700 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 701 txrc.rts = true;
e2ebc74d 702 }
e2ebc74d 703
0d528d85 704 info->control.use_rts = txrc.rts;
991fec09
FF		 705 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
706
e6a9854b
JB		 707 /*
708 * Use short preamble if the BSS can handle it, but not for
709 * management frames unless we know the receiver can handle
710 * that -- the management frame might be to a station that
711 * just wants a probe response.
712 */
713 if (tx->sdata->vif.bss_conf.use_short_preamble &&
714 (ieee80211_is_data(hdr->frame_control) ||
c2c98fde 715 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 716 txrc.short_preamble = true;
717
718 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 719
dfdfc2be
SE		 720 /* don't ask rate control when rate already injected via radiotap */
721 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
722 return TX_CONTINUE;
723
c2c98fde
JB		 724 if (tx->sta)
725 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 726
727 /*
728 * Lets not bother rate control if we're associated and cannot
729 * talk to the sta. This should not happen.
730 */
c2c98fde 731 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 732 !rate_usable_index_exists(sband, &tx->sta->sta),
733 "%s: Dropped data frame as no usable bitrate found while "
734 "scanning and associated. Target station: "
735 "%pM on %d GHz band\n",
47846c9b 736 tx->sdata->name, hdr->addr1,
2d56577b 737 info->band ? 5 : 2))
b770b43e 738 return TX_DROP;
2e92e6f2 739
b770b43e
LR		 740 /*
741 * If we're associated with the sta at this point we know we can at
742 * least send the frame at the lowest bit rate.
743 */
e6a9854b
JB		 744 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
745
0d528d85
FF		 746 if (tx->sta && !info->control.skip_table)
747 ratetbl = rcu_dereference(tx->sta->sta.rates);
748
749 if (unlikely(info->control.rates[0].idx < 0)) {
750 if (ratetbl) {
751 struct ieee80211_tx_rate rate = {
752 .idx = ratetbl->rate[0].idx,
753 .flags = ratetbl->rate[0].flags,
754 .count = ratetbl->rate[0].count
755 };
756
757 if (ratetbl->rate[0].idx < 0)
758 return TX_DROP;
759
760 tx->rate = rate;
761 } else {
762 return TX_DROP;
763 }
764 } else {
765 tx->rate = info->control.rates[0];
766 }
e6a9854b 767
c1ce5a74 768 if (txrc.reported_rate.idx < 0) {
0d528d85 769 txrc.reported_rate = tx->rate;
c1ce5a74 770 if (tx->sta && ieee80211_is_data(hdr->frame_control))
e5a9f8d0 771 tx->sta->tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 772 } else if (tx->sta)
e5a9f8d0 773 tx->sta->tx_stats.last_rate = txrc.reported_rate;
e039fa4a 774
0d528d85
FF		 775 if (ratetbl)
776 return TX_CONTINUE;
777
e6a9854b
JB		 778 if (unlikely(!info->control.rates[0].count))
779 info->control.rates[0].count = 1;
e2ebc74d 780
9955151d
GS		 781 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
782 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
783 info->control.rates[0].count = 1;
784
e6a9854b
JB		 785 return TX_CONTINUE;
786}
787
ba8c3d6f
FF		 788static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
789{
790 u16 *seq = &sta->tid_seq[tid];
791 __le16 ret = cpu_to_le16(*seq);
792
793 /* Increase the sequence number. */
794 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
795
796 return ret;
797}
798
df6ef5d8
FF		 799static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
800 struct ieee80211_vif *vif,
801 struct ieee80211_sta *pubsta,
802 struct sk_buff *skb)
803{
804 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
805 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
806 struct ieee80211_txq *txq = NULL;
807
808 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
809 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
810 return NULL;
811
812 if (!ieee80211_is_data(hdr->frame_control))
813 return NULL;
814
815 if (pubsta) {
816 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
817
818 txq = pubsta->txq[tid];
819 } else if (vif) {
820 txq = vif->txq;
821 }
822
823 if (!txq)
824 return NULL;
825
826 return to_txq_info(txq);
827}
828
f591fa5d
JB		 829static ieee80211_tx_result debug_noinline
830ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
831{
832 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
833 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 834 u8 *qc;
835 int tid;
836
25d834e1
JB		 837 /*
838 * Packet injection may want to control the sequence
839 * number, if we have no matching interface then we
840 * neither assign one ourselves nor ask the driver to.
841 */
5061b0c2 842 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 843 return TX_CONTINUE;
844
f591fa5d
JB		 845 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
846 return TX_CONTINUE;
847
848 if (ieee80211_hdrlen(hdr->frame_control) < 24)
849 return TX_CONTINUE;
850
49a59543
JB		 851 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
852 return TX_CONTINUE;
853
94778280
JB		 854 /*
855 * Anything but QoS data that has a sequence number field
856 * (is long enough) gets a sequence number from the global
c4c205f3
BC		 857 * counter. QoS data frames with a multicast destination
858 * also use the global counter (802.11-2012 9.3.2.10).
94778280 859 */
c4c205f3
BC		 860 if (!ieee80211_is_data_qos(hdr->frame_control) ||
861 is_multicast_ether_addr(hdr->addr1)) {
94778280 862 /* driver should assign sequence number */
f591fa5d 863 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 864 /* for pure STA mode without beacons, we can do it */
865 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
866 tx->sdata->sequence_number += 0x10;
79c892b8 867 if (tx->sta)
e5a9f8d0 868 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 869 return TX_CONTINUE;
870 }
871
872 /*
873 * This should be true for injected/management frames only, for
874 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
875 * above since they are not QoS-data frames.
876 */
877 if (!tx->sta)
878 return TX_CONTINUE;
879
880 /* include per-STA, per-TID sequence counter */
881
882 qc = ieee80211_get_qos_ctl(hdr);
883 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
e5a9f8d0 884 tx->sta->tx_stats.msdu[tid]++;
f591fa5d 885
df6ef5d8
FF		 886 if (!ieee80211_get_txq(tx->local, info->control.vif, &tx->sta->sta,
887 tx->skb))
ba8c3d6f 888 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
f591fa5d
JB		 889
890 return TX_CONTINUE;
891}
892
252b86c4 893static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 894 struct sk_buff *skb, int hdrlen,
895 int frag_threshold)
896{
252b86c4 897 struct ieee80211_local *local = tx->local;
a1a3fcec 898 struct ieee80211_tx_info *info;
252b86c4 899 struct sk_buff *tmp;
2de8e0d9
JB		 900 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
901 int pos = hdrlen + per_fragm;
902 int rem = skb->len - hdrlen - per_fragm;
903
904 if (WARN_ON(rem < 0))
905 return -EINVAL;
906
252b86c4
JB		 907 /* first fragment was already added to queue by caller */
908
2de8e0d9
JB		 909 while (rem) {
910 int fraglen = per_fragm;
911
912 if (fraglen > rem)
913 fraglen = rem;
914 rem -= fraglen;
915 tmp = dev_alloc_skb(local->tx_headroom +
916 frag_threshold +
2475b1cc 917 tx->sdata->encrypt_headroom +
2de8e0d9
JB		 918 IEEE80211_ENCRYPT_TAILROOM);
919 if (!tmp)
920 return -ENOMEM;
252b86c4
JB		 921
922 __skb_queue_tail(&tx->skbs, tmp);
923
2475b1cc
MS		 924 skb_reserve(tmp,
925 local->tx_headroom + tx->sdata->encrypt_headroom);
926
2de8e0d9
JB		 927 /* copy control information */
928 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 929
930 info = IEEE80211_SKB_CB(tmp);
931 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
932 IEEE80211_TX_CTL_FIRST_FRAGMENT);
933
934 if (rem)
935 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
936
2de8e0d9
JB		 937 skb_copy_queue_mapping(tmp, skb);
938 tmp->priority = skb->priority;
2de8e0d9 939 tmp->dev = skb->dev;
2de8e0d9
JB		 940
941 /* copy header and data */
942 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
943 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
944
945 pos += fraglen;
946 }
947
252b86c4 948 /* adjust first fragment's length */
338f977f 949 skb_trim(skb, hdrlen + per_fragm);
2de8e0d9
JB		 950 return 0;
951}
952
d9e8a70f 953static ieee80211_tx_result debug_noinline
e2454948
JB		 954ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
955{
2de8e0d9
JB		 956 struct sk_buff *skb = tx->skb;
957 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
958 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 959 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 960 int hdrlen;
961 int fragnum;
e2454948 962
252b86c4
JB		 963 /* no matter what happens, tx->skb moves to tx->skbs */
964 __skb_queue_tail(&tx->skbs, skb);
965 tx->skb = NULL;
966
a26eb27a
JB		 967 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
968 return TX_CONTINUE;
969
970 if (tx->local->ops->set_frag_threshold)
e2454948
JB		 971 return TX_CONTINUE;
972
eefce91a
JB		 973 /*
974 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 975 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 976 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 977 */
8b30b1fe 978 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 979 return TX_DROP;
980
065e9605 981 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 982
a26eb27a 983 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 984 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 985 return TX_DROP;
e6a9854b 986
2de8e0d9
JB		 987 /*
988 * Now fragment the frame. This will allocate all the fragments and
989 * chain them (using skb as the first fragment) to skb->next.
990 * During transmission, we will remove the successfully transmitted
991 * fragments from this list. When the low-level driver rejects one
992 * of the fragments then we will simply pretend to accept the skb
993 * but store it away as pending.
994 */
252b86c4 995 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 996 return TX_DROP;
e6a9854b 997
2de8e0d9
JB		 998 /* update duration/seq/flags of fragments */
999 fragnum = 0;
252b86c4
JB		 1000
1001 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1002 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 1003
2de8e0d9
JB		 1004 hdr = (void *)skb->data;
1005 info = IEEE80211_SKB_CB(skb);
e6a9854b 1006
252b86c4 1007 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 1008 hdr->frame_control |= morefrags;
e6a9854b
JB		 1009 /*
1010 * No multi-rate retries for fragmented frames, that
1011 * would completely throw off the NAV at other STAs.
1012 */
1013 info->control.rates[1].idx = -1;
1014 info->control.rates[2].idx = -1;
1015 info->control.rates[3].idx = -1;
e3e1a0bc 1016 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 1017 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 1018 } else {
1019 hdr->frame_control &= ~morefrags;
e6a9854b 1020 }
2de8e0d9
JB		 1021 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
1022 fragnum++;
252b86c4 1023 }
e2ebc74d 1024
9ae54c84 1025 return TX_CONTINUE;
e2ebc74d
JB		 1026}
1027
feff1f2f
JB		 1028static ieee80211_tx_result debug_noinline
1029ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1030{
252b86c4 1031 struct sk_buff *skb;
560d2682 1032 int ac = -1;
feff1f2f
JB		 1033
1034 if (!tx->sta)
1035 return TX_CONTINUE;
1036
252b86c4 1037 skb_queue_walk(&tx->skbs, skb) {
560d2682 1038 ac = skb_get_queue_mapping(skb);
e5a9f8d0 1039 tx->sta->tx_stats.bytes[ac] += skb->len;
252b86c4 1040 }
560d2682 1041 if (ac >= 0)
e5a9f8d0 1042 tx->sta->tx_stats.packets[ac]++;
feff1f2f
JB		 1043
1044 return TX_CONTINUE;
1045}
1046
d9e8a70f 1047static ieee80211_tx_result debug_noinline
e2454948
JB		 1048ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1049{
1050 if (!tx->key)
1051 return TX_CONTINUE;
1052
97359d12
JB		 1053 switch (tx->key->conf.cipher) {
1054 case WLAN_CIPHER_SUITE_WEP40:
1055 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1056 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1057 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1058 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1059 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 1060 return ieee80211_crypto_ccmp_encrypt(
1061 tx, IEEE80211_CCMP_MIC_LEN);
1062 case WLAN_CIPHER_SUITE_CCMP_256:
1063 return ieee80211_crypto_ccmp_encrypt(
1064 tx, IEEE80211_CCMP_256_MIC_LEN);
97359d12 1065 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1066 return ieee80211_crypto_aes_cmac_encrypt(tx);
56c52da2
JM		 1067 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1068 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
8ade538b
JM		 1069 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1070 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1071 return ieee80211_crypto_aes_gmac_encrypt(tx);
00b9cfa3
JM		 1072 case WLAN_CIPHER_SUITE_GCMP:
1073 case WLAN_CIPHER_SUITE_GCMP_256:
1074 return ieee80211_crypto_gcmp_encrypt(tx);
3ffc2a90 1075 default:
d32a1028 1076 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1077 }
1078
e2454948
JB		 1079 return TX_DROP;
1080}
1081
d9e8a70f 1082static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1083ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1084{
252b86c4 1085 struct sk_buff *skb;
2de8e0d9
JB		 1086 struct ieee80211_hdr *hdr;
1087 int next_len;
1088 bool group_addr;
03f93c3d 1089
252b86c4 1090 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1091 hdr = (void *) skb->data;
7e0aae47
JM		 1092 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1093 break; /* must not overwrite AID */
252b86c4
JB		 1094 if (!skb_queue_is_last(&tx->skbs, skb)) {
1095 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1096 next_len = next->len;
1097 } else
1098 next_len = 0;
2de8e0d9 1099 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1100
2de8e0d9 1101 hdr->duration_id =
252b86c4
JB		 1102 ieee80211_duration(tx, skb, group_addr, next_len);
1103 }
03f93c3d
JB		 1104
1105 return TX_CONTINUE;
1106}
1107
e2ebc74d
JB		 1108/* actual transmit path */
1109
a622ab72
JB		 1110static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1111 struct sk_buff *skb,
1112 struct ieee80211_tx_info *info,
1113 struct tid_ampdu_tx *tid_tx,
1114 int tid)
1115{
1116 bool queued = false;
285fa695 1117 bool reset_agg_timer = false;
aa454580 1118 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1119
1120 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1121 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1122 reset_agg_timer = true;
0ab33703
JB		 1123 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1124 /*
1125 * nothing -- this aggregation session is being started
1126 * but that might still fail with the driver
1127 */
ba8c3d6f 1128 } else if (!tx->sta->sta.txq[tid]) {
a622ab72
JB		 1129 spin_lock(&tx->sta->lock);
1130 /*
1131 * Need to re-check now, because we may get here
1132 *
1133 * 1) in the window during which the setup is actually
1134 * already done, but not marked yet because not all
1135 * packets are spliced over to the driver pending
1136 * queue yet -- if this happened we acquire the lock
1137 * either before or after the splice happens, but
1138 * need to recheck which of these cases happened.
1139 *
1140 * 2) during session teardown, if the OPERATIONAL bit
1141 * was cleared due to the teardown but the pointer
1142 * hasn't been assigned NULL yet (or we loaded it
1143 * before it was assigned) -- in this case it may
1144 * now be NULL which means we should just let the
1145 * packet pass through because splicing the frames
1146 * back is already done.
1147 */
40b275b6 1148 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1149
1150 if (!tid_tx) {
1151 /* do nothing, let packet pass through */
1152 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1153 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1154 reset_agg_timer = true;
a622ab72
JB		 1155 } else {
1156 queued = true;
f6d4671a
EG		 1157 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1158 clear_sta_flag(tx->sta, WLAN_STA_SP);
1159 ps_dbg(tx->sta->sdata,
1160 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1161 tx->sta->sta.addr, tx->sta->sta.aid);
1162 }
a622ab72
JB		 1163 info->control.vif = &tx->sdata->vif;
1164 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
facde7f3 1165 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
a622ab72 1166 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1167 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1168 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1169 }
1170 spin_unlock(&tx->sta->lock);
aa454580
HS		 1171
1172 if (purge_skb)
c3e7724b 1173 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1174 }
1175
285fa695
NM		 1176 /* reset session timer */
1177 if (reset_agg_timer && tid_tx->timeout)
12d3952f 1178 tid_tx->last_tx = jiffies;
285fa695 1179
a622ab72
JB		 1180 return queued;
1181}
1182
58d4185e
JB		 1183/*
1184 * initialises @tx
7c10770f
JB		 1185 * pass %NULL for the station if unknown, a valid pointer if known
1186 * or an ERR_PTR() if the station is known not to exist
58d4185e 1187 */
9ae54c84 1188static ieee80211_tx_result
3b8d81e0
JB		 1189ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1190 struct ieee80211_tx_data *tx,
7c10770f 1191 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1192{
3b8d81e0 1193 struct ieee80211_local *local = sdata->local;
58d4185e 1194 struct ieee80211_hdr *hdr;
e039fa4a 1195 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1196 int tid;
a622ab72 1197 u8 *qc;
e2ebc74d
JB		 1198
1199 memset(tx, 0, sizeof(*tx));
1200 tx->skb = skb;
e2ebc74d 1201 tx->local = local;
3b8d81e0 1202 tx->sdata = sdata;
252b86c4 1203 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1204
cd8ffc80
JB		 1205 /*
1206 * If this flag is set to true anywhere, and we get here,
1207 * we are doing the needed processing, so remove the flag
1208 * now.
1209 */
1210 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1211
58d4185e
JB		 1212 hdr = (struct ieee80211_hdr *) skb->data;
1213
7c10770f
JB		 1214 if (likely(sta)) {
1215 if (!IS_ERR(sta))
1216 tx->sta = sta;
1217 } else {
1218 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1219 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1220 if (!tx->sta && sdata->wdev.use_4addr)
1221 return TX_DROP;
1222 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1223 IEEE80211_TX_CTL_INJECTED) ||
1224 tx->sdata->control_port_protocol == tx->skb->protocol) {
1225 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1226 }
1227 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1228 tx->sta = sta_info_get(sdata, hdr->addr1);
3f0e0b22 1229 }
58d4185e 1230
cd8ffc80 1231 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1232 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1233 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1234 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1235 struct tid_ampdu_tx *tid_tx;
1236
8b30b1fe
S		 1237 qc = ieee80211_get_qos_ctl(hdr);
1238 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1239
a622ab72
JB		 1240 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1241 if (tid_tx) {
1242 bool queued;
cd8ffc80 1243
a622ab72
JB		 1244 queued = ieee80211_tx_prep_agg(tx, skb, info,
1245 tid_tx, tid);
1246
1247 if (unlikely(queued))
1248 return TX_QUEUED;
1249 }
8b30b1fe
S		 1250 }
1251
badffb72 1252 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1253 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1254 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1255 } else
5cf121c3 1256 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1257
a26eb27a
JB		 1258 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1259 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1260 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1261 info->flags & IEEE80211_TX_CTL_AMPDU)
1262 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1263 }
1264
e2ebc74d 1265 if (!tx->sta)
e039fa4a 1266 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1267 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1268 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1269 ieee80211_check_fast_xmit(tx->sta);
1270 }
58d4185e 1271
e039fa4a 1272 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1273
9ae54c84 1274 return TX_CONTINUE;
e2ebc74d
JB		 1275}
1276
5caa328e
MK		 1277static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1278{
1279 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1280}
1281
1282static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
1283{
1284 IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
1285}
1286
1287static u32 codel_skb_len_func(const struct sk_buff *skb)
1288{
1289 return skb->len;
1290}
1291
1292static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1293{
1294 const struct ieee80211_tx_info *info;
1295
1296 info = (const struct ieee80211_tx_info *)skb->cb;
1297 return info->control.enqueue_time;
1298}
1299
1300static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1301 void *ctx)
1302{
1303 struct ieee80211_local *local;
1304 struct txq_info *txqi;
1305 struct fq *fq;
1306 struct fq_flow *flow;
1307
1308 txqi = ctx;
1309 local = vif_to_sdata(txqi->txq.vif)->local;
1310 fq = &local->fq;
1311
1312 if (cvars == &txqi->def_cvars)
1313 flow = &txqi->def_flow;
1314 else
1315 flow = &fq->flows[cvars - local->cvars];
1316
1317 return fq_flow_dequeue(fq, flow);
1318}
1319
1320static void codel_drop_func(struct sk_buff *skb,
1321 void *ctx)
1322{
1323 struct ieee80211_local *local;
1324 struct ieee80211_hw *hw;
1325 struct txq_info *txqi;
1326
1327 txqi = ctx;
1328 local = vif_to_sdata(txqi->txq.vif)->local;
1329 hw = &local->hw;
1330
1331 ieee80211_free_txskb(hw, skb);
1332}
1333
fa962b92
MK		 1334static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1335 struct fq_tin *tin,
1336 struct fq_flow *flow)
1337{
5caa328e
MK		 1338 struct ieee80211_local *local;
1339 struct txq_info *txqi;
1340 struct codel_vars *cvars;
1341 struct codel_params *cparams;
1342 struct codel_stats *cstats;
1343
1344 local = container_of(fq, struct ieee80211_local, fq);
1345 txqi = container_of(tin, struct txq_info, tin);
1346 cparams = &local->cparams;
1347 cstats = &local->cstats;
1348
1349 if (flow == &txqi->def_flow)
1350 cvars = &txqi->def_cvars;
1351 else
1352 cvars = &local->cvars[flow - fq->flows];
1353
1354 return codel_dequeue(txqi,
1355 &flow->backlog,
1356 cparams,
1357 cvars,
1358 cstats,
1359 codel_skb_len_func,
1360 codel_skb_time_func,
1361 codel_drop_func,
1362 codel_dequeue_func);
fa962b92
MK		 1363}
1364
1365static void fq_skb_free_func(struct fq *fq,
1366 struct fq_tin *tin,
1367 struct fq_flow *flow,
1368 struct sk_buff *skb)
1369{
1370 struct ieee80211_local *local;
1371
1372 local = container_of(fq, struct ieee80211_local, fq);
1373 ieee80211_free_txskb(&local->hw, skb);
1374}
1375
1376static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1377 struct fq_tin *tin,
1378 int idx,
1379 struct sk_buff *skb)
1380{
1381 struct txq_info *txqi;
1382
1383 txqi = container_of(tin, struct txq_info, tin);
1384 return &txqi->def_flow;
1385}
1386
80a83cfc
MK		 1387static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1388 struct txq_info *txqi,
1389 struct sk_buff *skb)
1390{
fa962b92
MK		 1391 struct fq *fq = &local->fq;
1392 struct fq_tin *tin = &txqi->tin;
f2ac7e30 1393
5caa328e 1394 ieee80211_set_skb_enqueue_time(skb);
fa962b92
MK		 1395 fq_tin_enqueue(fq, tin, skb,
1396 fq_skb_free_func,
1397 fq_flow_get_default_func);
1398}
ba8c3d6f 1399
fa962b92
MK		 1400void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1401 struct sta_info *sta,
1402 struct txq_info *txqi, int tid)
1403{
1404 fq_tin_init(&txqi->tin);
1405 fq_flow_init(&txqi->def_flow);
5caa328e 1406 codel_vars_init(&txqi->def_cvars);
fa962b92
MK		 1407
1408 txqi->txq.vif = &sdata->vif;
1409
1410 if (sta) {
1411 txqi->txq.sta = &sta->sta;
1412 sta->sta.txq[tid] = &txqi->txq;
1413 txqi->txq.tid = tid;
1414 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
1415 } else {
1416 sdata->vif.txq = &txqi->txq;
1417 txqi->txq.tid = 0;
1418 txqi->txq.ac = IEEE80211_AC_BE;
80a83cfc 1419 }
fa962b92 1420}
ba8c3d6f 1421
fa962b92
MK		 1422void ieee80211_txq_purge(struct ieee80211_local *local,
1423 struct txq_info *txqi)
1424{
1425 struct fq *fq = &local->fq;
1426 struct fq_tin *tin = &txqi->tin;
1427
1428 fq_tin_reset(fq, tin, fq_skb_free_func);
1429}
1430
1431int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1432{
1433 struct fq *fq = &local->fq;
1434 int ret;
5caa328e 1435 int i;
fa962b92
MK		 1436
1437 if (!local->ops->wake_tx_queue)
1438 return 0;
1439
1440 ret = fq_init(fq, 4096);
1441 if (ret)
1442 return ret;
1443
5caa328e
MK		 1444 codel_params_init(&local->cparams);
1445 codel_stats_init(&local->cstats);
1446 local->cparams.interval = MS2TIME(100);
1447 local->cparams.target = MS2TIME(20);
1448 local->cparams.ecn = true;
1449
1450 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1451 GFP_KERNEL);
1452 if (!local->cvars) {
59a7c828 1453 spin_lock_bh(&fq->lock);
5caa328e 1454 fq_reset(fq, fq_skb_free_func);
59a7c828 1455 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1456 return -ENOMEM;
1457 }
1458
1459 for (i = 0; i < fq->flows_cnt; i++)
1460 codel_vars_init(&local->cvars[i]);
1461
fa962b92
MK		 1462 return 0;
1463}
1464
1465void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1466{
1467 struct fq *fq = &local->fq;
1468
1469 if (!local->ops->wake_tx_queue)
1470 return;
1471
5caa328e
MK		 1472 kfree(local->cvars);
1473 local->cvars = NULL;
1474
59a7c828 1475 spin_lock_bh(&fq->lock);
fa962b92 1476 fq_reset(fq, fq_skb_free_func);
59a7c828 1477 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1478}
1479
1480struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
1481 struct ieee80211_txq *txq)
1482{
1483 struct ieee80211_local *local = hw_to_local(hw);
ba8c3d6f
FF		 1484 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
1485 struct ieee80211_hdr *hdr;
1486 struct sk_buff *skb = NULL;
fa962b92
MK		 1487 struct fq *fq = &local->fq;
1488 struct fq_tin *tin = &txqi->tin;
ba8c3d6f 1489
fa962b92 1490 spin_lock_bh(&fq->lock);
ba8c3d6f
FF		 1491
1492 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
1493 goto out;
1494
fa962b92 1495 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
ba8c3d6f
FF		 1496 if (!skb)
1497 goto out;
1498
5caa328e
MK		 1499 ieee80211_set_skb_vif(skb, txqi);
1500
ba8c3d6f
FF		 1501 hdr = (struct ieee80211_hdr *)skb->data;
1502 if (txq->sta && ieee80211_is_data_qos(hdr->frame_control)) {
1503 struct sta_info *sta = container_of(txq->sta, struct sta_info,
1504 sta);
1505 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1506
1507 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, txq->tid);
1508 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
1509 info->flags |= IEEE80211_TX_CTL_AMPDU;
1510 else
1511 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1512 }
1513
1514out:
fa962b92 1515 spin_unlock_bh(&fq->lock);
ba8c3d6f 1516
6e0456b5
FF		 1517 if (skb && skb_has_frag_list(skb) &&
1518 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST))
1519 skb_linearize(skb);
1520
ba8c3d6f
FF		 1521 return skb;
1522}
1523EXPORT_SYMBOL(ieee80211_tx_dequeue);
1524
11127e91
JB		 1525static bool ieee80211_tx_frags(struct ieee80211_local *local,
1526 struct ieee80211_vif *vif,
1527 struct ieee80211_sta *sta,
1528 struct sk_buff_head *skbs,
1529 bool txpending)
e2ebc74d 1530{
80a83cfc 1531 struct ieee80211_tx_control control = {};
fa962b92 1532 struct fq *fq = &local->fq;
252b86c4 1533 struct sk_buff *skb, *tmp;
80a83cfc 1534 struct txq_info *txqi;
3b8d81e0 1535 unsigned long flags;
e2ebc74d 1536
252b86c4 1537 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1538 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1539 int q = info->hw_queue;
1540
1541#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1542 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1543 __skb_unlink(skb, skbs);
c3e7724b 1544 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1545 continue;
1546 }
1547#endif
3b8d81e0 1548
80a83cfc
MK		 1549 txqi = ieee80211_get_txq(local, vif, sta, skb);
1550 if (txqi) {
1551 info->control.vif = vif;
1552
1553 __skb_unlink(skb, skbs);
1554
fa962b92 1555 spin_lock_bh(&fq->lock);
80a83cfc 1556 ieee80211_txq_enqueue(local, txqi, skb);
fa962b92 1557 spin_unlock_bh(&fq->lock);
80a83cfc
MK		 1558
1559 drv_wake_tx_queue(local, txqi);
1560
1561 continue;
1562 }
1563
3b8d81e0 1564 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1565 if (local->queue_stop_reasons[q] ||
7bb45683 1566 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1567 if (unlikely(info->flags &
a7679ed5
SF		 1568 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1569 if (local->queue_stop_reasons[q] &
1570 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1571 /*
1572 * Drop off-channel frames if queues
1573 * are stopped for any reason other
1574 * than off-channel operation. Never
1575 * queue them.
1576 */
1577 spin_unlock_irqrestore(
1578 &local->queue_stop_reason_lock,
1579 flags);
1580 ieee80211_purge_tx_queue(&local->hw,
1581 skbs);
1582 return true;
1583 }
1584 } else {
1585
6c17b77b 1586 /*
a7679ed5
SF		 1587 * Since queue is stopped, queue up frames for
1588 * later transmission from the tx-pending
1589 * tasklet when the queue is woken again.
6c17b77b 1590 */
a7679ed5
SF		 1591 if (txpending)
1592 skb_queue_splice_init(skbs,
1593 &local->pending[q]);
1594 else
1595 skb_queue_splice_tail_init(skbs,
1596 &local->pending[q]);
1597
1598 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1599 flags);
1600 return false;
6c17b77b 1601 }
7bb45683 1602 }
3b8d81e0 1603 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1604
11127e91 1605 info->control.vif = vif;
80a83cfc 1606 control.sta = sta;
f0e72851 1607
11127e91 1608 __skb_unlink(skb, skbs);
80a83cfc 1609 drv_tx(local, &control, skb);
11127e91 1610 }
5061b0c2 1611
11127e91
JB		 1612 return true;
1613}
1614
1615/*
1616 * Returns false if the frame couldn't be transmitted but was queued instead.
1617 */
1618static bool __ieee80211_tx(struct ieee80211_local *local,
1619 struct sk_buff_head *skbs, int led_len,
1620 struct sta_info *sta, bool txpending)
1621{
1622 struct ieee80211_tx_info *info;
1623 struct ieee80211_sub_if_data *sdata;
1624 struct ieee80211_vif *vif;
1625 struct ieee80211_sta *pubsta;
1626 struct sk_buff *skb;
1627 bool result = true;
1628 __le16 fc;
5061b0c2 1629
11127e91
JB		 1630 if (WARN_ON(skb_queue_empty(skbs)))
1631 return true;
ec25acc4 1632
11127e91
JB		 1633 skb = skb_peek(skbs);
1634 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1635 info = IEEE80211_SKB_CB(skb);
1636 sdata = vif_to_sdata(info->control.vif);
1637 if (sta && !sta->uploaded)
1638 sta = NULL;
1639
1640 if (sta)
1641 pubsta = &sta->sta;
1642 else
1643 pubsta = NULL;
1644
1645 switch (sdata->vif.type) {
1646 case NL80211_IFTYPE_MONITOR:
d8212184 1647 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
c82b5a74
JB		 1648 vif = &sdata->vif;
1649 break;
1650 }
4b6f1dd6 1651 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1652 if (sdata) {
4b6f1dd6 1653 vif = &sdata->vif;
3a25a8c8
JB		 1654 info->hw_queue =
1655 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1656 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1657 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1658 return true;
1659 } else
4b6f1dd6 1660 vif = NULL;
11127e91
JB		 1661 break;
1662 case NL80211_IFTYPE_AP_VLAN:
1663 sdata = container_of(sdata->bss,
1664 struct ieee80211_sub_if_data, u.ap);
1665 /* fall through */
1666 default:
1667 vif = &sdata->vif;
1668 break;
e2ebc74d 1669 }
2de8e0d9 1670
cb831b53
JB		 1671 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1672 txpending);
11127e91 1673
74e4dbfd 1674 ieee80211_tpt_led_trig_tx(local, fc, led_len);
74e4dbfd 1675
4db4e0a1 1676 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1677
11127e91 1678 return result;
e2ebc74d
JB		 1679}
1680
97b045d6
JB		 1681/*
1682 * Invoke TX handlers, return 0 on success and non-zero if the
1683 * frame was dropped or queued.
1684 */
1685static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1686{
252b86c4 1687 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
97b045d6 1688 ieee80211_tx_result res = TX_DROP;
97b045d6 1689
9aa4aee3
JB		 1690#define CALL_TXH(txh) \
1691 do { \
1692 res = txh(tx); \
1693 if (res != TX_CONTINUE) \
1694 goto txh_done; \
1695 } while (0)
1696
5c1b98a5 1697 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1698 CALL_TXH(ieee80211_tx_h_check_assoc);
1699 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1700 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1701 CALL_TXH(ieee80211_tx_h_select_key);
30686bf7 1702 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
af65cd96 1703 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1704
aa5b5492
JB		 1705 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1706 __skb_queue_tail(&tx->skbs, tx->skb);
1707 tx->skb = NULL;
c6fcf6bc 1708 goto txh_done;
aa5b5492 1709 }
c6fcf6bc
JB		 1710
1711 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1712 CALL_TXH(ieee80211_tx_h_sequence);
1713 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1714 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1715 CALL_TXH(ieee80211_tx_h_stats);
1716 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1717 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1718 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1719#undef CALL_TXH
97b045d6 1720
d9e8a70f 1721 txh_done:
97b045d6 1722 if (unlikely(res == TX_DROP)) {
5479d0e7 1723 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1724 if (tx->skb)
c3e7724b 1725 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1726 else
1f98ab7f 1727 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1728 return -1;
1729 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1730 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1731 return -1;
1732 }
1733
1734 return 0;
1735}
1736
06be6b14
FF		 1737bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1738 struct ieee80211_vif *vif, struct sk_buff *skb,
1739 int band, struct ieee80211_sta **sta)
1740{
1741 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1742 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1743 struct ieee80211_tx_data tx;
88724a81 1744 struct sk_buff *skb2;
06be6b14 1745
7c10770f 1746 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1747 return false;
1748
1749 info->band = band;
1750 info->control.vif = vif;
1751 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1752
1753 if (invoke_tx_handlers(&tx))
1754 return false;
1755
1756 if (sta) {
1757 if (tx.sta)
1758 *sta = &tx.sta->sta;
1759 else
1760 *sta = NULL;
1761 }
1762
88724a81
JB		 1763 /* this function isn't suitable for fragmented data frames */
1764 skb2 = __skb_dequeue(&tx.skbs);
1765 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1766 ieee80211_free_txskb(hw, skb2);
1767 ieee80211_purge_tx_queue(hw, &tx.skbs);
1768 return false;
1769 }
1770
06be6b14
FF		 1771 return true;
1772}
1773EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1774
7bb45683
JB		 1775/*
1776 * Returns false if the frame couldn't be transmitted but was queued instead.
1777 */
1778static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f
JB		 1779 struct sta_info *sta, struct sk_buff *skb,
1780 bool txpending)
e2ebc74d 1781{
3b8d81e0 1782 struct ieee80211_local *local = sdata->local;
5cf121c3 1783 struct ieee80211_tx_data tx;
97b045d6 1784 ieee80211_tx_result res_prepare;
e039fa4a 1785 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1786 bool result = true;
74e4dbfd 1787 int led_len;
e2ebc74d 1788
e2ebc74d
JB		 1789 if (unlikely(skb->len < 10)) {
1790 dev_kfree_skb(skb);
7bb45683 1791 return true;
e2ebc74d
JB		 1792 }
1793
58d4185e 1794 /* initialises tx */
74e4dbfd 1795 led_len = skb->len;
7c10770f 1796 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1797
cd8ffc80 1798 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1799 ieee80211_free_txskb(&local->hw, skb);
55de908a 1800 return true;
cd8ffc80 1801 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1802 return true;
e2ebc74d
JB		 1803 }
1804
3a25a8c8
JB		 1805 /* set up hw_queue value early */
1806 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1807 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1808 info->hw_queue =
1809 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1810
7bb45683 1811 if (!invoke_tx_handlers(&tx))
74e4dbfd
JB		 1812 result = __ieee80211_tx(local, &tx.skbs, led_len,
1813 tx.sta, txpending);
55de908a 1814
7bb45683 1815 return result;
e2ebc74d
JB		 1816}
1817
1818/* device xmit handlers */
1819
3bff1865 1820static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1821 struct sk_buff *skb,
1822 int head_need, bool may_encrypt)
1823{
3bff1865 1824 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1825 int tail_need = 0;
1826
3bff1865 1827 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1828 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1829 tail_need -= skb_tailroom(skb);
1830 tail_need = max_t(int, tail_need, 0);
1831 }
1832
c70f59a2 1833 if (skb_cloned(skb) &&
30686bf7 1834 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
c70f59a2 1835 !skb_clone_writable(skb, ETH_HLEN) ||
17c18bf8 1836 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
23c0752a 1837 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1838 else if (head_need || tail_need)
23c0752a 1839 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1840 else
1841 return 0;
23c0752a
JB		 1842
1843 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1844 wiphy_debug(local->hw.wiphy,
1845 "failed to reallocate TX buffer\n");
23c0752a
JB		 1846 return -ENOMEM;
1847 }
1848
23c0752a
JB		 1849 return 0;
1850}
1851
7c10770f
JB		 1852void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1853 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1854{
3b8d81e0 1855 struct ieee80211_local *local = sdata->local;
e039fa4a 1856 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e32f85f7 1857 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 1858 int headroom;
23c0752a 1859 bool may_encrypt;
e2ebc74d 1860
3b8d81e0 1861 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1862
3b8d81e0 1863 headroom = local->tx_headroom;
23c0752a 1864 if (may_encrypt)
2475b1cc 1865 headroom += sdata->encrypt_headroom;
23c0752a
JB		 1866 headroom -= skb_headroom(skb);
1867 headroom = max_t(int, 0, headroom);
1868
3bff1865 1869 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1870 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1871 return;
e2ebc74d
JB		 1872 }
1873
740c1aa3 1874 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1875 info->control.vif = &sdata->vif;
e2ebc74d 1876
3f52b7e3
MP		 1877 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1878 if (ieee80211_is_data(hdr->frame_control) &&
1879 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1880 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1881 return; /* skb queued: don't free */
1882 } else {
1883 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1884 }
98aed9fd 1885 }
cca89496 1886
2154c81c 1887 ieee80211_set_qos_hdr(sdata, skb);
7c10770f 1888 ieee80211_tx(sdata, sta, skb, false);
e2ebc74d
JB		 1889}
1890
dfdfc2be
SE		 1891static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1892 struct sk_buff *skb)
73b9f03a
JB		 1893{
1894 struct ieee80211_radiotap_iterator iterator;
1895 struct ieee80211_radiotap_header *rthdr =
1896 (struct ieee80211_radiotap_header *) skb->data;
1897 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
dfdfc2be
SE		 1898 struct ieee80211_supported_band *sband =
1899 local->hw.wiphy->bands[info->band];
73b9f03a
JB		 1900 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1901 NULL);
1902 u16 txflags;
dfdfc2be
SE		 1903 u16 rate = 0;
1904 bool rate_found = false;
1905 u8 rate_retries = 0;
1906 u16 rate_flags = 0;
f66b60f6 1907 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 1908 u16 vht_known;
1909 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 1910 int i;
73b9f03a
JB		 1911
1912 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1913 IEEE80211_TX_CTL_DONTFRAG;
1914
1915 /*
1916 * for every radiotap entry that is present
1917 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1918 * entries present, or -EINVAL on error)
1919 */
1920
1921 while (!ret) {
1922 ret = ieee80211_radiotap_iterator_next(&iterator);
1923
1924 if (ret)
1925 continue;
1926
1927 /* see if this argument is something we can use */
1928 switch (iterator.this_arg_index) {
1929 /*
1930 * You must take care when dereferencing iterator.this_arg
1931 * for multibyte types... the pointer is not aligned. Use
1932 * get_unaligned((type *)iterator.this_arg) to dereference
1933 * iterator.this_arg for type "type" safely on all arches.
1934 */
1935 case IEEE80211_RADIOTAP_FLAGS:
1936 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1937 /*
1938 * this indicates that the skb we have been
1939 * handed has the 32-bit FCS CRC at the end...
1940 * we should react to that by snipping it off
1941 * because it will be recomputed and added
1942 * on transmission
1943 */
1944 if (skb->len < (iterator._max_length + FCS_LEN))
1945 return false;
1946
1947 skb_trim(skb, skb->len - FCS_LEN);
1948 }
1949 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1950 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1951 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1952 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1953 break;
1954
1955 case IEEE80211_RADIOTAP_TX_FLAGS:
1956 txflags = get_unaligned_le16(iterator.this_arg);
1957 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1958 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1959 break;
1960
dfdfc2be
SE		 1961 case IEEE80211_RADIOTAP_RATE:
1962 rate = *iterator.this_arg;
1963 rate_flags = 0;
1964 rate_found = true;
1965 break;
1966
1967 case IEEE80211_RADIOTAP_DATA_RETRIES:
1968 rate_retries = *iterator.this_arg;
1969 break;
1970
1971 case IEEE80211_RADIOTAP_MCS:
1972 mcs_known = iterator.this_arg[0];
1973 mcs_flags = iterator.this_arg[1];
1974 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
1975 break;
1976
1977 rate_found = true;
1978 rate = iterator.this_arg[2];
1979 rate_flags = IEEE80211_TX_RC_MCS;
1980
1981 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
1982 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
1983 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
1984
f66b60f6 1985 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 1986 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 1987 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be
SE		 1988 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1989 break;
1990
646e76bb
LB		 1991 case IEEE80211_RADIOTAP_VHT:
1992 vht_known = get_unaligned_le16(iterator.this_arg);
1993 rate_found = true;
1994
1995 rate_flags = IEEE80211_TX_RC_VHT_MCS;
1996 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
1997 (iterator.this_arg[2] &
1998 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
1999 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2000 if (vht_known &
2001 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2002 if (iterator.this_arg[3] == 1)
2003 rate_flags |=
2004 IEEE80211_TX_RC_40_MHZ_WIDTH;
2005 else if (iterator.this_arg[3] == 4)
2006 rate_flags |=
2007 IEEE80211_TX_RC_80_MHZ_WIDTH;
2008 else if (iterator.this_arg[3] == 11)
2009 rate_flags |=
2010 IEEE80211_TX_RC_160_MHZ_WIDTH;
2011 }
2012
2013 vht_mcs = iterator.this_arg[4] >> 4;
2014 vht_nss = iterator.this_arg[4] & 0xF;
2015 break;
2016
73b9f03a
JB		 2017 /*
2018 * Please update the file
2019 * Documentation/networking/mac80211-injection.txt
2020 * when parsing new fields here.
2021 */
2022
2023 default:
2024 break;
2025 }
2026 }
2027
2028 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2029 return false;
2030
dfdfc2be
SE		 2031 if (rate_found) {
2032 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2033
2034 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2035 info->control.rates[i].idx = -1;
2036 info->control.rates[i].flags = 0;
2037 info->control.rates[i].count = 0;
2038 }
2039
2040 if (rate_flags & IEEE80211_TX_RC_MCS) {
2041 info->control.rates[0].idx = rate;
646e76bb
LB		 2042 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2043 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2044 vht_nss);
dfdfc2be
SE		 2045 } else {
2046 for (i = 0; i < sband->n_bitrates; i++) {
2047 if (rate * 5 != sband->bitrates[i].bitrate)
2048 continue;
2049
2050 info->control.rates[0].idx = i;
2051 break;
2052 }
2053 }
2054
07310a63
FF		 2055 if (info->control.rates[0].idx < 0)
2056 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2057
dfdfc2be
SE		 2058 info->control.rates[0].flags = rate_flags;
2059 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2060 local->hw.max_rate_tries);
2061 }
2062
73b9f03a
JB		 2063 /*
2064 * remove the radiotap header
2065 * iterator->_max_length was sanity-checked against
2066 * skb->len by iterator init
2067 */
2068 skb_pull(skb, iterator._max_length);
2069
2070 return true;
2071}
2072
d0cf9c0d
SH		 2073netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2074 struct net_device *dev)
e2ebc74d
JB		 2075{
2076 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2077 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d
JB		 2078 struct ieee80211_radiotap_header *prthdr =
2079 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 2080 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2081 struct ieee80211_hdr *hdr;
5d9cf4a5 2082 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2083 struct cfg80211_chan_def *chandef;
9b8a74e3 2084 u16 len_rthdr;
5d9cf4a5 2085 int hdrlen;
e2ebc74d 2086
9b8a74e3
AG		 2087 /* check for not even having the fixed radiotap header part */
2088 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2089 goto fail; /* too short to be possibly valid */
2090
2091 /* is it a header version we can trust to find length from? */
2092 if (unlikely(prthdr->it_version))
2093 goto fail; /* only version 0 is supported */
2094
2095 /* then there must be a radiotap header with a length we can use */
2096 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2097
2098 /* does the skb contain enough to deliver on the alleged length? */
2099 if (unlikely(skb->len < len_rthdr))
2100 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 2101
e2ebc74d
JB		 2102 /*
2103 * fix up the pointers accounting for the radiotap
2104 * header still being in there. We are being given
2105 * a precooked IEEE80211 header so no need for
2106 * normal processing
2107 */
9b8a74e3 2108 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2109 /*
9b8a74e3
AG		 2110 * these are just fixed to the end of the rt area since we
2111 * don't have any better information and at this point, nobody cares
e2ebc74d 2112 */
9b8a74e3
AG		 2113 skb_set_network_header(skb, len_rthdr);
2114 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2115
5d9cf4a5
JB		 2116 if (skb->len < len_rthdr + 2)
2117 goto fail;
2118
2119 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2120 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2121
2122 if (skb->len < len_rthdr + hdrlen)
2123 goto fail;
2124
f75f5c6f
HS		 2125 /*
2126 * Initialize skb->protocol if the injected frame is a data frame
2127 * carrying a rfc1042 header
2128 */
5d9cf4a5
JB		 2129 if (ieee80211_is_data(hdr->frame_control) &&
2130 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2131 u8 *payload = (u8 *)hdr + hdrlen;
2132
b203ca39 2133 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2134 skb->protocol = cpu_to_be16((payload[6] << 8) |
2135 payload[7]);
f75f5c6f
HS		 2136 }
2137
3b8d81e0
JB		 2138 memset(info, 0, sizeof(*info));
2139
5d9cf4a5 2140 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 2141 IEEE80211_TX_CTL_INJECTED;
2142
5d9cf4a5
JB		 2143 rcu_read_lock();
2144
2145 /*
2146 * We process outgoing injected frames that have a local address
2147 * we handle as though they are non-injected frames.
2148 * This code here isn't entirely correct, the local MAC address
2149 * isn't always enough to find the interface to use; for proper
2150 * VLAN/WDS support we will need a different mechanism (which
2151 * likely isn't going to be monitor interfaces).
2152 */
2153 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2154
2155 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2156 if (!ieee80211_sdata_running(tmp_sdata))
2157 continue;
2158 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2159 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2160 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2161 continue;
b203ca39 2162 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2163 sdata = tmp_sdata;
2164 break;
2165 }
2166 }
7351c6bd 2167
55de908a
JB		 2168 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2169 if (!chanctx_conf) {
2170 tmp_sdata = rcu_dereference(local->monitor_sdata);
2171 if (tmp_sdata)
2172 chanctx_conf =
2173 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2174 }
55de908a 2175
b4a7ff75 2176 if (chanctx_conf)
b4932836 2177 chandef = &chanctx_conf->def;
b4a7ff75 2178 else if (!local->use_chanctx)
b4932836 2179 chandef = &local->_oper_chandef;
b4a7ff75
FF		 2180 else
2181 goto fail_rcu;
55de908a
JB		 2182
2183 /*
2184 * Frame injection is not allowed if beaconing is not allowed
2185 * or if we need radar detection. Beaconing is usually not allowed when
2186 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2187 * Passive scan is also used in world regulatory domains where
2188 * your country is not known and as such it should be treated as
2189 * NO TX unless the channel is explicitly allowed in which case
2190 * your current regulatory domain would not have the passive scan
2191 * flag.
2192 *
2193 * Since AP mode uses monitor interfaces to inject/TX management
2194 * frames we can make AP mode the exception to this rule once it
2195 * supports radar detection as its implementation can deal with
2196 * radar detection by itself. We can do that later by adding a
2197 * monitor flag interfaces used for AP support.
2198 */
b4932836
JD		 2199 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2200 sdata->vif.type))
55de908a
JB		 2201 goto fail_rcu;
2202
73c4e195 2203 info->band = chandef->chan->band;
109843b0
LB		 2204
2205 /* process and remove the injection radiotap header */
2206 if (!ieee80211_parse_tx_radiotap(local, skb))
2207 goto fail_rcu;
2208
7c10770f 2209 ieee80211_xmit(sdata, NULL, skb);
5d9cf4a5
JB		 2210 rcu_read_unlock();
2211
e2ebc74d 2212 return NETDEV_TX_OK;
9b8a74e3 2213
55de908a
JB		 2214fail_rcu:
2215 rcu_read_unlock();
9b8a74e3
AG		 2216fail:
2217 dev_kfree_skb(skb);
2218 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2219}
2220
97ffe757 2221static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2222{
97ffe757 2223 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2224
97ffe757
JB		 2225 return ethertype == ETH_P_TDLS &&
2226 skb->len > 14 &&
2227 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2228}
2229
2230static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2231 struct sk_buff *skb,
2232 struct sta_info **sta_out)
2233{
2234 struct sta_info *sta;
2235
2236 switch (sdata->vif.type) {
2237 case NL80211_IFTYPE_AP_VLAN:
2238 sta = rcu_dereference(sdata->u.vlan.sta);
2239 if (sta) {
2240 *sta_out = sta;
2241 return 0;
2242 } else if (sdata->wdev.use_4addr) {
2243 return -ENOLINK;
2244 }
2245 /* fall through */
2246 case NL80211_IFTYPE_AP:
2247 case NL80211_IFTYPE_OCB:
2248 case NL80211_IFTYPE_ADHOC:
2249 if (is_multicast_ether_addr(skb->data)) {
2250 *sta_out = ERR_PTR(-ENOENT);
2251 return 0;
2252 }
2253 sta = sta_info_get_bss(sdata, skb->data);
2254 break;
2255 case NL80211_IFTYPE_WDS:
2256 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2257 break;
2258#ifdef CONFIG_MAC80211_MESH
2259 case NL80211_IFTYPE_MESH_POINT:
2260 /* determined much later */
2261 *sta_out = NULL;
2262 return 0;
2263#endif
2264 case NL80211_IFTYPE_STATION:
2265 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2266 sta = sta_info_get(sdata, skb->data);
2267 if (sta) {
2268 bool tdls_peer, tdls_auth;
2269
2270 tdls_peer = test_sta_flag(sta,
2271 WLAN_STA_TDLS_PEER);
2272 tdls_auth = test_sta_flag(sta,
2273 WLAN_STA_TDLS_PEER_AUTH);
2274
2275 if (tdls_peer && tdls_auth) {
2276 *sta_out = sta;
2277 return 0;
2278 }
2279
2280 /*
2281 * TDLS link during setup - throw out frames to
2282 * peer. Allow TDLS-setup frames to unauthorized
2283 * peers for the special case of a link teardown
2284 * after a TDLS sta is removed due to being
2285 * unreachable.
2286 */
2287 if (tdls_peer && !tdls_auth &&
2288 !ieee80211_is_tdls_setup(skb))
2289 return -EINVAL;
2290 }
2291
2292 }
2293
2294 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2295 if (!sta)
2296 return -ENOLINK;
2297 break;
2298 default:
2299 return -EINVAL;
2300 }
2301
2302 *sta_out = sta ?: ERR_PTR(-ENOENT);
2303 return 0;
ad38bfc9
MG		 2304}
2305
e2ebc74d 2306/**
4c9451ed
JB		 2307 * ieee80211_build_hdr - build 802.11 header in the given frame
2308 * @sdata: virtual interface to build the header for
2309 * @skb: the skb to build the header in
24d342c5 2310 * @info_flags: skb flags to set
e2ebc74d 2311 *
4c9451ed
JB		 2312 * This function takes the skb with 802.3 header and reformats the header to
2313 * the appropriate IEEE 802.11 header based on which interface the packet is
2314 * being transmitted on.
2315 *
2316 * Note that this function also takes care of the TX status request and
2317 * potential unsharing of the SKB - this needs to be interleaved with the
2318 * header building.
e2ebc74d 2319 *
4c9451ed
JB		 2320 * The function requires the read-side RCU lock held
2321 *
2322 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2323 */
4c9451ed 2324static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2325 struct sk_buff *skb, u32 info_flags,
97ffe757 2326 struct sta_info *sta)
e2ebc74d 2327{
133b8226 2328 struct ieee80211_local *local = sdata->local;
489ee919 2329 struct ieee80211_tx_info *info;
dcf33963 2330 int head_need;
065e9605
HH		 2331 u16 ethertype, hdrlen, meshhdrlen = 0;
2332 __le16 fc;
e2ebc74d 2333 struct ieee80211_hdr hdr;
ff67bb86 2334 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2335 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2336 const u8 *encaps_data;
2337 int encaps_len, skip_header_bytes;
97ffe757
JB		 2338 bool wme_sta = false, authorized = false;
2339 bool tdls_peer;
a729cff8 2340 bool multicast;
a729cff8 2341 u16 info_id = 0;
55de908a
JB		 2342 struct ieee80211_chanctx_conf *chanctx_conf;
2343 struct ieee80211_sub_if_data *ap_sdata;
57fbcce3 2344 enum nl80211_band band;
4c9451ed 2345 int ret;
e2ebc74d 2346
97ffe757
JB		 2347 if (IS_ERR(sta))
2348 sta = NULL;
2349
e2ebc74d
JB		 2350 /* convert Ethernet header to proper 802.11 header (based on
2351 * operation mode) */
2352 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2353 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2354
51fb61e7 2355 switch (sdata->vif.type) {
05c914fe 2356 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2357 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2358 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2359 /* RA TA DA SA */
2360 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2361 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2362 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2363 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2364 hdrlen = 30;
c2c98fde 2365 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2366 wme_sta = sta->sta.wme;
f14543ee 2367 }
55de908a
JB		 2368 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2369 u.ap);
2370 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
4c9451ed
JB		 2371 if (!chanctx_conf) {
2372 ret = -ENOTCONN;
2373 goto free;
2374 }
4bf88530 2375 band = chanctx_conf->def.chan->band;
97ffe757 2376 if (sdata->wdev.use_4addr)
f14543ee
FF		 2377 break;
2378 /* fall through */
2379 case NL80211_IFTYPE_AP:
fe80123d
AB		 2380 if (sdata->vif.type == NL80211_IFTYPE_AP)
2381 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2382 if (!chanctx_conf) {
2383 ret = -ENOTCONN;
2384 goto free;
2385 }
065e9605 2386 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2387 /* DA BSSID SA */
2388 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 2389 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2390 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2391 hdrlen = 24;
4bf88530 2392 band = chanctx_conf->def.chan->band;
cf966838 2393 break;
05c914fe 2394 case NL80211_IFTYPE_WDS:
065e9605 2395 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 2396 /* RA TA DA SA */
2397 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 2398 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2399 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2400 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2401 hdrlen = 30;
55de908a
JB		 2402 /*
2403 * This is the exception! WDS style interfaces are prohibited
2404 * when channel contexts are in used so this must be valid
2405 */
675a0b04 2406 band = local->hw.conf.chandef.chan->band;
cf966838 2407 break;
33b64eb2 2408#ifdef CONFIG_MAC80211_MESH
05c914fe 2409 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2410 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2411 struct sta_info *next_hop;
2412 bool mpp_lookup = true;
2413
bf7cd94d 2414 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2415 if (mpath) {
2416 mpp_lookup = false;
2417 next_hop = rcu_dereference(mpath->next_hop);
2418 if (!next_hop ||
2419 !(mpath->flags & (MESH_PATH_ACTIVE |
2420 MESH_PATH_RESOLVING)))
2421 mpp_lookup = true;
2422 }
2423
ab1c7906 2424 if (mpp_lookup) {
bf7cd94d 2425 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2426 if (mppath)
2427 mppath->exp_time = jiffies;
2428 }
163df6cf
CYY		 2429
2430 if (mppath && mpath)
2bdaf386 2431 mesh_path_del(sdata, mpath->dst);
b8bacc18 2432 }
79617dee 2433
f76b57b4 2434 /*
9d52501b
JF		 2435 * Use address extension if it is a packet from
2436 * another interface or if we know the destination
2437 * is being proxied by a portal (i.e. portal address
2438 * differs from proxied address)
f76b57b4 2439 */
b203ca39
JP		 2440 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2441 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2442 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2443 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2444 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2445 NULL, NULL);
79617dee 2446 } else {
27f01124
TP		 2447 /* DS -> MBSS (802.11-2012 13.11.3.3).
2448 * For unicast with unknown forwarding information,
2449 * destination might be in the MBSS or if that fails
2450 * forwarded to another mesh gate. In either case
2451 * resolution will be handled in ieee80211_xmit(), so
2452 * leave the original DA. This also works for mcast */
2453 const u8 *mesh_da = skb->data;
2454
2455 if (mppath)
2456 mesh_da = mppath->mpp;
2457 else if (mpath)
2458 mesh_da = mpath->dst;
79617dee 2459
3c5772a5 2460 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2461 mesh_da, sdata->vif.addr);
27f01124
TP		 2462 if (is_multicast_ether_addr(mesh_da))
2463 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2464 meshhdrlen = ieee80211_new_mesh_header(
2465 sdata, &mesh_hdr,
2466 skb->data + ETH_ALEN, NULL);
3c5772a5 2467 else
27f01124 2468 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2469 meshhdrlen = ieee80211_new_mesh_header(
2470 sdata, &mesh_hdr, skb->data,
2471 skb->data + ETH_ALEN);
79617dee 2472
79617dee 2473 }
55de908a 2474 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2475 if (!chanctx_conf) {
2476 ret = -ENOTCONN;
2477 goto free;
2478 }
4bf88530 2479 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 2480 break;
2481#endif
05c914fe 2482 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2483 /* we already did checks when looking up the RA STA */
2484 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2485
97ffe757 2486 if (tdls_peer) {
941c93cd
AN		 2487 /* DA SA BSSID */
2488 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2489 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2490 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2491 hdrlen = 24;
2492 } else if (sdata->u.mgd.use_4addr &&
2493 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2494 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2495 IEEE80211_FCTL_TODS);
f14543ee 2496 /* RA TA DA SA */
941c93cd 2497 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 2498 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2499 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2500 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2501 hdrlen = 30;
2502 } else {
2503 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2504 /* BSSID SA DA */
941c93cd 2505 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 2506 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2507 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2508 hdrlen = 24;
2509 }
55de908a 2510 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2511 if (!chanctx_conf) {
2512 ret = -ENOTCONN;
2513 goto free;
2514 }
4bf88530 2515 band = chanctx_conf->def.chan->band;
cf966838 2516 break;
239281f8
RL		 2517 case NL80211_IFTYPE_OCB:
2518 /* DA SA BSSID */
2519 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2520 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2521 eth_broadcast_addr(hdr.addr3);
2522 hdrlen = 24;
2523 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2524 if (!chanctx_conf) {
2525 ret = -ENOTCONN;
2526 goto free;
2527 }
239281f8
RL		 2528 band = chanctx_conf->def.chan->band;
2529 break;
05c914fe 2530 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2531 /* DA SA BSSID */
2532 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2533 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2534 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2535 hdrlen = 24;
55de908a 2536 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2537 if (!chanctx_conf) {
2538 ret = -ENOTCONN;
2539 goto free;
2540 }
4bf88530 2541 band = chanctx_conf->def.chan->band;
cf966838
JB		 2542 break;
2543 default:
4c9451ed
JB		 2544 ret = -EINVAL;
2545 goto free;
e2ebc74d
JB		 2546 }
2547
a729cff8 2548 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2549
97ffe757
JB		 2550 /* sta is always NULL for mesh */
2551 if (sta) {
2552 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2553 wme_sta = sta->sta.wme;
2554 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2555 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2556 wme_sta = true;
97ffe757 2557 }
4777be41 2558
527871d7
JB		 2559 /* receiver does QoS (which also means we do) use it */
2560 if (wme_sta) {
065e9605 2561 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2562 hdrlen += 2;
2563 }
2564
2565 /*
238814fd
JB		 2566 * Drop unicast frames to unauthorised stations unless they are
2567 * EAPOL frames from the local station.
ce3edf6d 2568 */
55182e4a 2569 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2570 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2571 !multicast && !authorized &&
55182e4a 2572 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2573 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2574#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2575 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2576 sdata->name, hdr.addr1);
ce3edf6d
JB		 2577#endif
2578
2579 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2580
4c9451ed
JB		 2581 ret = -EPERM;
2582 goto free;
ce3edf6d
JB		 2583 }
2584
a729cff8
JB		 2585 if (unlikely(!multicast && skb->sk &&
2586 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
bf7fa551 2587 struct sk_buff *ack_skb = skb_clone_sk(skb);
a729cff8 2588
bf7fa551 2589 if (ack_skb) {
a729cff8 2590 unsigned long flags;
9475af6e 2591 int id;
a729cff8
JB		 2592
2593 spin_lock_irqsave(&local->ack_status_lock, flags);
bf7fa551 2594 id = idr_alloc(&local->ack_status_frames, ack_skb,
9475af6e 2595 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2596 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2597
9475af6e 2598 if (id >= 0) {
a729cff8
JB		 2599 info_id = id;
2600 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
a729cff8 2601 } else {
bf7fa551 2602 kfree_skb(ack_skb);
a729cff8 2603 }
a729cff8
JB		 2604 }
2605 }
2606
7e244707
HS		 2607 /*
2608 * If the skb is shared we need to obtain our own copy.
2609 */
2610 if (skb_shared(skb)) {
a729cff8
JB		 2611 struct sk_buff *tmp_skb = skb;
2612
2613 /* can't happen -- skb is a clone if info_id != 0 */
2614 WARN_ON(info_id);
2615
f8a0a781 2616 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2617 kfree_skb(tmp_skb);
2618
4c9451ed
JB		 2619 if (!skb) {
2620 ret = -ENOMEM;
2621 goto free;
2622 }
7e244707
HS		 2623 }
2624
065e9605 2625 hdr.frame_control = fc;
e2ebc74d
JB		 2626 hdr.duration_id = 0;
2627 hdr.seq_ctrl = 0;
2628
2629 skip_header_bytes = ETH_HLEN;
2630 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2631 encaps_data = bridge_tunnel_header;
2632 encaps_len = sizeof(bridge_tunnel_header);
2633 skip_header_bytes -= 2;
e5c5d22e 2634 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2635 encaps_data = rfc1042_header;
2636 encaps_len = sizeof(rfc1042_header);
2637 skip_header_bytes -= 2;
2638 } else {
2639 encaps_data = NULL;
2640 encaps_len = 0;
2641 }
2642
2643 skb_pull(skb, skip_header_bytes);
23c0752a 2644 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2645
23c0752a
JB		 2646 /*
2647 * So we need to modify the skb header and hence need a copy of
2648 * that. The head_need variable above doesn't, so far, include
2649 * the needed header space that we don't need right away. If we
2650 * can, then we don't reallocate right now but only after the
2651 * frame arrives at the master device (if it does...)
2652 *
2653 * If we cannot, however, then we will reallocate to include all
2654 * the ever needed space. Also, if we need to reallocate it anyway,
2655 * make it big enough for everything we may ever need.
2656 */
e2ebc74d 2657
3a5be7d4 2658 if (head_need > 0 || skb_cloned(skb)) {
2475b1cc 2659 head_need += sdata->encrypt_headroom;
23c0752a
JB		 2660 head_need += local->tx_headroom;
2661 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2662 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2663 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2664 skb = NULL;
4c9451ed 2665 return ERR_PTR(-ENOMEM);
c3e7724b 2666 }
e2ebc74d
JB		 2667 }
2668
eae4430e 2669 if (encaps_data)
e2ebc74d 2670 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2671
e4ab7eb0 2672#ifdef CONFIG_MAC80211_MESH
eae4430e 2673 if (meshhdrlen > 0)
33b64eb2 2674 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2675#endif
33b64eb2 2676
065e9605 2677 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2678 __le16 *qos_control;
2679
f359d3fe 2680 qos_control = (__le16 *) skb_push(skb, 2);
c29b9b9b
JB		 2681 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2682 /*
2683 * Maybe we could actually set some fields here, for now just
2684 * initialise to zero to indicate no special operation.
2685 */
2686 *qos_control = 0;
2687 } else
2688 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2689
d57a544d 2690 skb_reset_mac_header(skb);
e2ebc74d 2691
489ee919 2692 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2693 memset(info, 0, sizeof(*info));
2694
a729cff8
JB		 2695 info->flags = info_flags;
2696 info->ack_frame_id = info_id;
73c4e195 2697 info->band = band;
a729cff8 2698
4c9451ed
JB		 2699 return skb;
2700 free:
2701 kfree_skb(skb);
2702 return ERR_PTR(ret);
2703}
2704
17c18bf8
JB		 2705/*
2706 * fast-xmit overview
2707 *
2708 * The core idea of this fast-xmit is to remove per-packet checks by checking
2709 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2710 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2711 * much less work can be done per packet. For example, fragmentation must be
2712 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2713 * in the code here.
2714 *
2715 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2716 * header and other data to aid packet processing in ieee80211_xmit_fast().
2717 *
2718 * The most difficult part of this is that when any of these assumptions
2719 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2720 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2721 * since the per-packet code no longer checks the conditions. This is reflected
2722 * by the calls to these functions throughout the rest of the code, and must be
2723 * maintained if any of the TX path checks change.
2724 */
2725
2726void ieee80211_check_fast_xmit(struct sta_info *sta)
2727{
2728 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2729 struct ieee80211_local *local = sta->local;
2730 struct ieee80211_sub_if_data *sdata = sta->sdata;
2731 struct ieee80211_hdr *hdr = (void *)build.hdr;
2732 struct ieee80211_chanctx_conf *chanctx_conf;
2733 __le16 fc;
2734
30686bf7 2735 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 2736 return;
2737
2738 /* Locking here protects both the pointer itself, and against concurrent
2739 * invocations winning data access races to, e.g., the key pointer that
2740 * is used.
2741 * Without it, the invocation of this function right after the key
2742 * pointer changes wouldn't be sufficient, as another CPU could access
2743 * the pointer, then stall, and then do the cache update after the CPU
2744 * that invalidated the key.
2745 * With the locking, such scenarios cannot happen as the check for the
2746 * key and the fast-tx assignment are done atomically, so the CPU that
2747 * modifies the key will either wait or other one will see the key
2748 * cleared/changed already.
2749 */
2750 spin_lock_bh(&sta->lock);
30686bf7
JB		 2751 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2752 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 2753 sdata->vif.type == NL80211_IFTYPE_STATION)
2754 goto out;
2755
2756 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2757 goto out;
2758
2759 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2760 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 2761 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2762 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 2763 goto out;
2764
2765 if (sdata->noack_map)
2766 goto out;
2767
2768 /* fast-xmit doesn't handle fragmentation at all */
725b812c
JB		 2769 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2770 !local->ops->set_frag_threshold)
17c18bf8
JB		 2771 goto out;
2772
2773 rcu_read_lock();
2774 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2775 if (!chanctx_conf) {
2776 rcu_read_unlock();
2777 goto out;
2778 }
2779 build.band = chanctx_conf->def.chan->band;
2780 rcu_read_unlock();
2781
2782 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2783
2784 switch (sdata->vif.type) {
3ffd8840
JB		 2785 case NL80211_IFTYPE_ADHOC:
2786 /* DA SA BSSID */
2787 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2788 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2789 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2790 build.hdr_len = 24;
2791 break;
17c18bf8
JB		 2792 case NL80211_IFTYPE_STATION:
2793 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2794 /* DA SA BSSID */
2795 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2796 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2797 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2798 build.hdr_len = 24;
2799 break;
2800 }
2801
2802 if (sdata->u.mgd.use_4addr) {
2803 /* non-regular ethertype cannot use the fastpath */
2804 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2805 IEEE80211_FCTL_TODS);
2806 /* RA TA DA SA */
2807 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2808 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2809 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2810 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2811 build.hdr_len = 30;
2812 break;
2813 }
2814 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2815 /* BSSID SA DA */
2816 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2817 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2818 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2819 build.hdr_len = 24;
2820 break;
2821 case NL80211_IFTYPE_AP_VLAN:
2822 if (sdata->wdev.use_4addr) {
2823 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2824 IEEE80211_FCTL_TODS);
2825 /* RA TA DA SA */
2826 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2827 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2828 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2829 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2830 build.hdr_len = 30;
2831 break;
2832 }
2833 /* fall through */
2834 case NL80211_IFTYPE_AP:
2835 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2836 /* DA BSSID SA */
2837 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2838 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2839 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2840 build.hdr_len = 24;
2841 break;
2842 default:
2843 /* not handled on fast-xmit */
2844 goto out;
2845 }
2846
2847 if (sta->sta.wme) {
2848 build.hdr_len += 2;
2849 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2850 }
2851
2852 /* We store the key here so there's no point in using rcu_dereference()
2853 * but that's fine because the code that changes the pointers will call
2854 * this function after doing so. For a single CPU that would be enough,
2855 * for multiple see the comment above.
2856 */
2857 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2858 if (!build.key)
2859 build.key = rcu_access_pointer(sdata->default_unicast_key);
2860 if (build.key) {
e495c247 2861 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 2862
2863 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2864 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
e495c247 2865 mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC;
17c18bf8
JB		 2866
2867 /* don't handle software crypto */
2868 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2869 goto out;
2870
2871 switch (build.key->conf.cipher) {
2872 case WLAN_CIPHER_SUITE_CCMP:
2873 case WLAN_CIPHER_SUITE_CCMP_256:
2874 /* add fixed key ID */
2875 if (gen_iv) {
2876 (build.hdr + build.hdr_len)[3] =
2877 0x20 | (build.key->conf.keyidx << 6);
2878 build.pn_offs = build.hdr_len;
2879 }
2880 if (gen_iv || iv_spc)
2881 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2882 break;
2883 case WLAN_CIPHER_SUITE_GCMP:
2884 case WLAN_CIPHER_SUITE_GCMP_256:
2885 /* add fixed key ID */
2886 if (gen_iv) {
2887 (build.hdr + build.hdr_len)[3] =
2888 0x20 | (build.key->conf.keyidx << 6);
2889 build.pn_offs = build.hdr_len;
2890 }
2891 if (gen_iv || iv_spc)
2892 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2893 break;
e495c247
JB		 2894 case WLAN_CIPHER_SUITE_TKIP:
2895 /* cannot handle MMIC or IV generation in xmit-fast */
2896 if (mmic || gen_iv)
2897 goto out;
2898 if (iv_spc)
2899 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2900 break;
2901 case WLAN_CIPHER_SUITE_WEP40:
2902 case WLAN_CIPHER_SUITE_WEP104:
2903 /* cannot handle IV generation in fast-xmit */
2904 if (gen_iv)
2905 goto out;
2906 if (iv_spc)
2907 build.hdr_len += IEEE80211_WEP_IV_LEN;
2908 break;
2909 case WLAN_CIPHER_SUITE_AES_CMAC:
2910 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2911 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2912 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2913 WARN(1,
2914 "management cipher suite 0x%x enabled for data\n",
2915 build.key->conf.cipher);
17c18bf8 2916 goto out;
e495c247
JB		 2917 default:
2918 /* we don't know how to generate IVs for this at all */
2919 if (WARN_ON(gen_iv))
2920 goto out;
2921 /* pure hardware keys are OK, of course */
2922 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2923 break;
2924 /* cipher scheme might require space allocation */
2925 if (iv_spc &&
2926 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2927 goto out;
2928 if (iv_spc)
2929 build.hdr_len += build.key->conf.iv_len;
17c18bf8
JB		 2930 }
2931
2932 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2933 }
2934
2935 hdr->frame_control = fc;
2936
2937 memcpy(build.hdr + build.hdr_len,
2938 rfc1042_header, sizeof(rfc1042_header));
2939 build.hdr_len += sizeof(rfc1042_header);
2940
2941 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
2942 /* if the kmemdup fails, continue w/o fast_tx */
2943 if (!fast_tx)
2944 goto out;
2945
2946 out:
2947 /* we might have raced against another call to this function */
2948 old = rcu_dereference_protected(sta->fast_tx,
2949 lockdep_is_held(&sta->lock));
2950 rcu_assign_pointer(sta->fast_tx, fast_tx);
2951 if (old)
2952 kfree_rcu(old, rcu_head);
2953 spin_unlock_bh(&sta->lock);
2954}
2955
2956void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
2957{
2958 struct sta_info *sta;
2959
2960 rcu_read_lock();
2961 list_for_each_entry_rcu(sta, &local->sta_list, list)
2962 ieee80211_check_fast_xmit(sta);
2963 rcu_read_unlock();
2964}
2965
2966void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
2967{
2968 struct ieee80211_local *local = sdata->local;
2969 struct sta_info *sta;
2970
2971 rcu_read_lock();
2972
2973 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2974 if (sdata != sta->sdata &&
2975 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
2976 continue;
2977 ieee80211_check_fast_xmit(sta);
2978 }
2979
2980 rcu_read_unlock();
2981}
2982
2983void ieee80211_clear_fast_xmit(struct sta_info *sta)
2984{
2985 struct ieee80211_fast_tx *fast_tx;
2986
2987 spin_lock_bh(&sta->lock);
2988 fast_tx = rcu_dereference_protected(sta->fast_tx,
2989 lockdep_is_held(&sta->lock));
2990 RCU_INIT_POINTER(sta->fast_tx, NULL);
2991 spin_unlock_bh(&sta->lock);
2992
2993 if (fast_tx)
2994 kfree_rcu(fast_tx, rcu_head);
2995}
2996
6e0456b5
FF		 2997static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
2998 struct sk_buff *skb, int headroom,
2999 int *subframe_len)
3000{
3001 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3002 int padding = (4 - amsdu_len) & 3;
3003
3004 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3005 I802_DEBUG_INC(local->tx_expand_skb_head);
3006
3007 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3008 wiphy_debug(local->hw.wiphy,
3009 "failed to reallocate TX buffer\n");
3010 return false;
3011 }
3012 }
3013
3014 if (padding) {
3015 *subframe_len += padding;
3016 memset(skb_put(skb, padding), 0, padding);
3017 }
3018
3019 return true;
3020}
3021
3022static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3023 struct ieee80211_fast_tx *fast_tx,
3024 struct sk_buff *skb)
3025{
3026 struct ieee80211_local *local = sdata->local;
3027 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3028 struct ieee80211_hdr *hdr;
3029 struct ethhdr amsdu_hdr;
3030 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3031 int subframe_len = skb->len - hdr_len;
3032 void *data;
3033 u8 *qc;
3034
3035 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3036 return false;
3037
3038 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3039 return true;
3040
3041 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(amsdu_hdr),
3042 &subframe_len))
3043 return false;
3044
3045 amsdu_hdr.h_proto = cpu_to_be16(subframe_len);
3046 memcpy(amsdu_hdr.h_source, skb->data + fast_tx->sa_offs, ETH_ALEN);
3047 memcpy(amsdu_hdr.h_dest, skb->data + fast_tx->da_offs, ETH_ALEN);
3048
3049 data = skb_push(skb, sizeof(amsdu_hdr));
3050 memmove(data, data + sizeof(amsdu_hdr), hdr_len);
3051 memcpy(data + hdr_len, &amsdu_hdr, sizeof(amsdu_hdr));
3052
3053 hdr = data;
3054 qc = ieee80211_get_qos_ctl(hdr);
3055 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3056
3057 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3058
3059 return true;
3060}
3061
3062static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3063 struct sta_info *sta,
3064 struct ieee80211_fast_tx *fast_tx,
3065 struct sk_buff *skb)
3066{
3067 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3068 struct fq *fq = &local->fq;
3069 struct fq_tin *tin;
3070 struct fq_flow *flow;
6e0456b5
FF		 3071 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3072 struct ieee80211_txq *txq = sta->sta.txq[tid];
3073 struct txq_info *txqi;
3074 struct sk_buff **frag_tail, *head;
3075 int subframe_len = skb->len - ETH_ALEN;
3076 u8 max_subframes = sta->sta.max_amsdu_subframes;
3077 int max_frags = local->hw.max_tx_fragments;
3078 int max_amsdu_len = sta->sta.max_amsdu_len;
3079 __be16 len;
3080 void *data;
3081 bool ret = false;
fa962b92 3082 unsigned int orig_len;
6e0456b5
FF		 3083 int n = 1, nfrags;
3084
3085 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3086 return false;
3087
3088 if (!txq)
3089 return false;
3090
3091 txqi = to_txq_info(txq);
3092 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3093 return false;
3094
3095 if (sta->sta.max_rc_amsdu_len)
3096 max_amsdu_len = min_t(int, max_amsdu_len,
3097 sta->sta.max_rc_amsdu_len);
3098
fa962b92 3099 spin_lock_bh(&fq->lock);
6e0456b5 3100
fa962b92
MK		 3101 /* TODO: Ideally aggregation should be done on dequeue to remain
3102 * responsive to environment changes.
3103 */
3104
3105 tin = &txqi->tin;
3106 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3107 head = skb_peek_tail(&flow->queue);
6e0456b5
FF		 3108 if (!head)
3109 goto out;
3110
fa962b92
MK		 3111 orig_len = head->len;
3112
6e0456b5
FF		 3113 if (skb->len + head->len > max_amsdu_len)
3114 goto out;
3115
3116 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3117 goto out;
3118
3119 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3120 nfrags += 1 + skb_shinfo(head)->nr_frags;
3121 frag_tail = &skb_shinfo(head)->frag_list;
3122 while (*frag_tail) {
3123 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3124 frag_tail = &(*frag_tail)->next;
3125 n++;
3126 }
3127
3128 if (max_subframes && n > max_subframes)
3129 goto out;
3130
3131 if (max_frags && nfrags > max_frags)
3132 goto out;
3133
3134 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3135 &subframe_len))
3136 goto out;
3137
3138 ret = true;
3139 data = skb_push(skb, ETH_ALEN + 2);
3140 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3141
3142 data += 2 * ETH_ALEN;
3143 len = cpu_to_be16(subframe_len);
3144 memcpy(data, &len, 2);
3145 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3146
3147 head->len += skb->len;
3148 head->data_len += skb->len;
3149 *frag_tail = skb;
3150
fa962b92
MK		 3151 flow->backlog += head->len - orig_len;
3152 tin->backlog_bytes += head->len - orig_len;
3153
3154 fq_recalc_backlog(fq, tin, flow);
3155
6e0456b5 3156out:
fa962b92 3157 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3158
3159 return ret;
3160}
3161
17c18bf8
JB		 3162static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3163 struct net_device *dev, struct sta_info *sta,
3164 struct ieee80211_fast_tx *fast_tx,
3165 struct sk_buff *skb)
3166{
3167 struct ieee80211_local *local = sdata->local;
3168 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3169 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3170 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3171 struct ethhdr eth;
3172 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3173 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3174 struct ieee80211_tx_data tx;
3175 ieee80211_tx_result r;
3176 struct tid_ampdu_tx *tid_tx = NULL;
3177 u8 tid = IEEE80211_NUM_TIDS;
3178
3179 /* control port protocol needs a lot of special handling */
3180 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3181 return false;
3182
3183 /* only RFC 1042 SNAP */
3184 if (ethertype < ETH_P_802_3_MIN)
3185 return false;
3186
3187 /* don't handle TX status request here either */
3188 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3189 return false;
3190
3191 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3192 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3193 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
472be00d
JB		 3194 if (tid_tx) {
3195 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3196 return false;
3197 if (tid_tx->timeout)
3198 tid_tx->last_tx = jiffies;
3199 }
17c18bf8
JB		 3200 }
3201
3202 /* after this point (skb is modified) we cannot return false */
3203
3204 if (skb_shared(skb)) {
3205 struct sk_buff *tmp_skb = skb;
3206
3207 skb = skb_clone(skb, GFP_ATOMIC);
3208 kfree_skb(tmp_skb);
3209
3210 if (!skb)
3211 return true;
3212 }
3213
5a490510 3214 ieee80211_tx_stats(dev, skb->len + extra_head);
17c18bf8 3215
6e0456b5
FF		 3216 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3217 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3218 return true;
3219
17c18bf8
JB		 3220 /* will not be crypto-handled beyond what we do here, so use false
3221 * as the may-encrypt argument for the resize to not account for
3222 * more room than we already have in 'extra_head'
3223 */
3224 if (unlikely(ieee80211_skb_resize(sdata, skb,
3225 max_t(int, extra_head + hw_headroom -
3226 skb_headroom(skb), 0),
3227 false))) {
3228 kfree_skb(skb);
3229 return true;
3230 }
3231
3232 memcpy(&eth, skb->data, ETH_HLEN - 2);
3233 hdr = (void *)skb_push(skb, extra_head);
3234 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3235 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3236 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3237
3238 memset(info, 0, sizeof(*info));
3239 info->band = fast_tx->band;
3240 info->control.vif = &sdata->vif;
3241 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3242 IEEE80211_TX_CTL_DONTFRAG |
3243 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3244
3245 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3246 *ieee80211_get_qos_ctl(hdr) = tid;
df6ef5d8 3247 if (!ieee80211_get_txq(local, &sdata->vif, &sta->sta, skb))
50f36ae6 3248 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
17c18bf8
JB		 3249 } else {
3250 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3251 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3252 sdata->sequence_number += 0x10;
3253 }
3254
ccc6bb96 3255 if (skb_shinfo(skb)->gso_size)
e5a9f8d0 3256 sta->tx_stats.msdu[tid] +=
ccc6bb96
JB		 3257 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3258 else
e5a9f8d0 3259 sta->tx_stats.msdu[tid]++;
17c18bf8
JB		 3260
3261 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3262
3263 __skb_queue_head_init(&tx.skbs);
3264
3265 tx.flags = IEEE80211_TX_UNICAST;
3266 tx.local = local;
3267 tx.sdata = sdata;
3268 tx.sta = sta;
3269 tx.key = fast_tx->key;
3270
3271 if (fast_tx->key)
3272 info->control.hw_key = &fast_tx->key->conf;
3273
30686bf7 3274 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
17c18bf8
JB		 3275 tx.skb = skb;
3276 r = ieee80211_tx_h_rate_ctrl(&tx);
3277 skb = tx.skb;
3278 tx.skb = NULL;
3279
3280 if (r != TX_CONTINUE) {
3281 if (r != TX_QUEUED)
3282 kfree_skb(skb);
3283 return true;
3284 }
3285 }
3286
3287 /* statistics normally done by ieee80211_tx_h_stats (but that
3288 * has to consider fragmentation, so is more complex)
3289 */
e5a9f8d0
JB		 3290 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3291 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
17c18bf8
JB		 3292
3293 if (fast_tx->pn_offs) {
3294 u64 pn;
3295 u8 *crypto_hdr = skb->data + fast_tx->pn_offs;
3296
3297 switch (fast_tx->key->conf.cipher) {
3298 case WLAN_CIPHER_SUITE_CCMP:
3299 case WLAN_CIPHER_SUITE_CCMP_256:
17c18bf8
JB		 3300 case WLAN_CIPHER_SUITE_GCMP:
3301 case WLAN_CIPHER_SUITE_GCMP_256:
db388a56 3302 pn = atomic64_inc_return(&fast_tx->key->conf.tx_pn);
17c18bf8
JB		 3303 crypto_hdr[0] = pn;
3304 crypto_hdr[1] = pn >> 8;
3305 crypto_hdr[4] = pn >> 16;
3306 crypto_hdr[5] = pn >> 24;
3307 crypto_hdr[6] = pn >> 32;
3308 crypto_hdr[7] = pn >> 40;
3309 break;
3310 }
3311 }
3312
3313 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3314 sdata = container_of(sdata->bss,
3315 struct ieee80211_sub_if_data, u.ap);
3316
3317 __skb_queue_tail(&tx.skbs, skb);
3318 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3319 return true;
3320}
3321
4c9451ed
JB		 3322void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3323 struct net_device *dev,
3324 u32 info_flags)
3325{
3326 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
97ffe757 3327 struct sta_info *sta;
80616c0d 3328 struct sk_buff *next;
4c9451ed
JB		 3329
3330 if (unlikely(skb->len < ETH_HLEN)) {
3331 kfree_skb(skb);
3332 return;
3333 }
3334
3335 rcu_read_lock();
e2ebc74d 3336
2d981fdd
JB		 3337 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3338 goto out_free;
4c9451ed 3339
17c18bf8
JB		 3340 if (!IS_ERR_OR_NULL(sta)) {
3341 struct ieee80211_fast_tx *fast_tx;
3342
3343 fast_tx = rcu_dereference(sta->fast_tx);
3344
3345 if (fast_tx &&
3346 ieee80211_xmit_fast(sdata, dev, sta, fast_tx, skb))
3347 goto out;
3348 }
3349
80616c0d
JB		 3350 if (skb_is_gso(skb)) {
3351 struct sk_buff *segs;
680a0dab 3352
80616c0d
JB		 3353 segs = skb_gso_segment(skb, 0);
3354 if (IS_ERR(segs)) {
2d981fdd 3355 goto out_free;
80616c0d
JB		 3356 } else if (segs) {
3357 consume_skb(skb);
3358 skb = segs;
3359 }
3360 } else {
3361 /* we cannot process non-linear frames on this path */
3362 if (skb_linearize(skb)) {
3363 kfree_skb(skb);
3364 goto out;
3365 }
3366
3367 /* the frame could be fragmented, software-encrypted, and other
3368 * things so we cannot really handle checksum offload with it -
3369 * fix it up in software before we handle anything else.
3370 */
3371 if (skb->ip_summed == CHECKSUM_PARTIAL) {
f603f1f3
JB		 3372 skb_set_transport_header(skb,
3373 skb_checksum_start_offset(skb));
80616c0d
JB		 3374 if (skb_checksum_help(skb))
3375 goto out_free;
3376 }
2d981fdd
JB		 3377 }
3378
80616c0d
JB		 3379 next = skb;
3380 while (next) {
3381 skb = next;
3382 next = skb->next;
4c9451ed 3383
80616c0d
JB		 3384 skb->prev = NULL;
3385 skb->next = NULL;
3386
3387 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3388 if (IS_ERR(skb))
3389 goto out;
e2ebc74d 3390
5a490510 3391 ieee80211_tx_stats(dev, skb->len);
80616c0d
JB		 3392
3393 ieee80211_xmit(sdata, sta, skb);
3394 }
2d981fdd
JB		 3395 goto out;
3396 out_free:
3397 kfree_skb(skb);
4c9451ed 3398 out:
55de908a 3399 rcu_read_unlock();
e2ebc74d
JB		 3400}
3401
4c9451ed
JB		 3402/**
3403 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3404 * @skb: packet to be sent
3405 * @dev: incoming interface
3406 *
3407 * On failure skb will be freed.
3408 */
24d342c5
LK		 3409netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3410 struct net_device *dev)
3411{
3412 __ieee80211_subif_start_xmit(skb, dev, 0);
3413 return NETDEV_TX_OK;
3414}
e2ebc74d 3415
7528ec57
JB		 3416struct sk_buff *
3417ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3418 struct sk_buff *skb, u32 info_flags)
3419{
3420 struct ieee80211_hdr *hdr;
3421 struct ieee80211_tx_data tx = {
3422 .local = sdata->local,
3423 .sdata = sdata,
3424 };
97ffe757 3425 struct sta_info *sta;
7528ec57
JB		 3426
3427 rcu_read_lock();
3428
97ffe757
JB		 3429 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3430 kfree_skb(skb);
3431 skb = ERR_PTR(-EINVAL);
3432 goto out;
3433 }
3434
3435 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
7528ec57
JB		 3436 if (IS_ERR(skb))
3437 goto out;
3438
3439 hdr = (void *)skb->data;
3440 tx.sta = sta_info_get(sdata, hdr->addr1);
3441 tx.skb = skb;
3442
3443 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3444 rcu_read_unlock();
3445 kfree_skb(skb);
3446 return ERR_PTR(-EINVAL);
3447 }
3448
3449out:
3450 rcu_read_unlock();
3451 return skb;
3452}
3453
e2530083
JB		 3454/*
3455 * ieee80211_clear_tx_pending may not be called in a context where
3456 * it is possible that it packets could come in again.
3457 */
e2ebc74d
JB		 3458void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3459{
1f98ab7f 3460 struct sk_buff *skb;
2de8e0d9 3461 int i;
e2ebc74d 3462
1f98ab7f
FF		 3463 for (i = 0; i < local->hw.queues; i++) {
3464 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3465 ieee80211_free_txskb(&local->hw, skb);
3466 }
e2ebc74d
JB		 3467}
3468
7bb45683
JB		 3469/*
3470 * Returns false if the frame couldn't be transmitted but was queued instead,
3471 * which in this case means re-queued -- take as an indication to stop sending
3472 * more pending frames.
3473 */
cd8ffc80
JB		 3474static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3475 struct sk_buff *skb)
3476{
3477 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3478 struct ieee80211_sub_if_data *sdata;
3479 struct sta_info *sta;
3480 struct ieee80211_hdr *hdr;
7bb45683 3481 bool result;
55de908a 3482 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 3483
5061b0c2 3484 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 3485
3486 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 3487 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3488 if (unlikely(!chanctx_conf)) {
3489 dev_kfree_skb(skb);
3490 return true;
3491 }
73c4e195 3492 info->band = chanctx_conf->def.chan->band;
7c10770f 3493 result = ieee80211_tx(sdata, NULL, skb, true);
cd8ffc80 3494 } else {
252b86c4
JB		 3495 struct sk_buff_head skbs;
3496
3497 __skb_queue_head_init(&skbs);
3498 __skb_queue_tail(&skbs, skb);
3499
cd8ffc80 3500 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 3501 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 3502
74e4dbfd 3503 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 3504 }
3505
cd8ffc80
JB		 3506 return result;
3507}
3508
e2530083 3509/*
3b8d81e0 3510 * Transmit all pending packets. Called from tasklet.
e2530083 3511 */
e2ebc74d
JB		 3512void ieee80211_tx_pending(unsigned long data)
3513{
3514 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 3515 unsigned long flags;
cd8ffc80 3516 int i;
3b8d81e0 3517 bool txok;
e2ebc74d 3518
f0e72851 3519 rcu_read_lock();
e2530083 3520
3b8d81e0 3521 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 3522 for (i = 0; i < local->hw.queues; i++) {
3523 /*
3524 * If queue is stopped by something other than due to pending
3525 * frames, or we have no pending frames, proceed to next queue.
3526 */
3b8d81e0 3527 if (local->queue_stop_reasons[i] ||
2a577d98 3528 skb_queue_empty(&local->pending[i]))
e2ebc74d 3529 continue;
e2530083 3530
2a577d98 3531 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 3532 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 3533 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 3534
a7bc376c 3535 if (WARN_ON(!info->control.vif)) {
c3e7724b 3536 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 3537 continue;
3538 }
3539
3b8d81e0
JB		 3540 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3541 flags);
3542
3543 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 3544 spin_lock_irqsave(&local->queue_stop_reason_lock,
3545 flags);
3546 if (!txok)
2a577d98 3547 break;
e2ebc74d 3548 }
7236fe29
JB		 3549
3550 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 3551 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 3552 }
3b8d81e0 3553 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 3554
f0e72851 3555 rcu_read_unlock();
e2ebc74d
JB		 3556}
3557
3558/* functions for drivers to get certain frames */
3559
eac70c13 3560static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3561 struct ps_data *ps, struct sk_buff *skb,
3562 bool is_template)
e2ebc74d
JB		 3563{
3564 u8 *pos, *tim;
3565 int aid0 = 0;
3566 int i, have_bits = 0, n1, n2;
3567
3568 /* Generate bitmap for TIM only if there are any STAs in power save
3569 * mode. */
d012a605 3570 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 3571 /* in the hope that this is faster than
3572 * checking byte-for-byte */
f359d3fe 3573 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 3574 IEEE80211_MAX_AID+1);
6ec8c332
AO		 3575 if (!is_template) {
3576 if (ps->dtim_count == 0)
3577 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3578 else
3579 ps->dtim_count--;
3580 }
e2ebc74d
JB		 3581
3582 tim = pos = (u8 *) skb_put(skb, 6);
3583 *pos++ = WLAN_EID_TIM;
3584 *pos++ = 4;
d012a605 3585 *pos++ = ps->dtim_count;
8860020e 3586 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 3587
d012a605 3588 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 3589 aid0 = 1;
3590
d012a605 3591 ps->dtim_bc_mc = aid0 == 1;
512119b3 3592
e2ebc74d
JB		 3593 if (have_bits) {
3594 /* Find largest even number N1 so that bits numbered 1 through
3595 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3596 * (N2 + 1) x 8 through 2007 are 0. */
3597 n1 = 0;
3598 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 3599 if (ps->tim[i]) {
e2ebc74d
JB		 3600 n1 = i & 0xfe;
3601 break;
3602 }
3603 }
3604 n2 = n1;
3605 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 3606 if (ps->tim[i]) {
e2ebc74d
JB		 3607 n2 = i;
3608 break;
3609 }
3610 }
3611
3612 /* Bitmap control */
3613 *pos++ = n1 | aid0;
3614 /* Part Virt Bitmap */
5220da39 3615 skb_put(skb, n2 - n1);
d012a605 3616 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 3617
3618 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 3619 } else {
3620 *pos++ = aid0; /* Bitmap control */
3621 *pos++ = 0; /* Part Virt Bitmap */
3622 }
e2ebc74d
JB		 3623}
3624
eac70c13 3625static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3626 struct ps_data *ps, struct sk_buff *skb,
3627 bool is_template)
eac70c13
MP		 3628{
3629 struct ieee80211_local *local = sdata->local;
3630
3631 /*
3632 * Not very nice, but we want to allow the driver to call
3633 * ieee80211_beacon_get() as a response to the set_tim()
3634 * callback. That, however, is already invoked under the
3635 * sta_lock to guarantee consistent and race-free update
3636 * of the tim bitmap in mac80211 and the driver.
3637 */
3638 if (local->tim_in_locked_section) {
6ec8c332 3639 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
eac70c13 3640 } else {
1b91731d 3641 spin_lock_bh(&local->tim_lock);
6ec8c332 3642 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
1b91731d 3643 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 3644 }
3645
3646 return 0;
3647}
3648
1af586c9
AO		 3649static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
3650 struct beacon_data *beacon)
73da7d5b
SW		 3651{
3652 struct probe_resp *resp;
cd7760e6
SW		 3653 u8 *beacon_data;
3654 size_t beacon_data_len;
0d06d9ba 3655 int i;
af296bdb 3656 u8 count = beacon->csa_current_counter;
cd7760e6
SW		 3657
3658 switch (sdata->vif.type) {
3659 case NL80211_IFTYPE_AP:
3660 beacon_data = beacon->tail;
3661 beacon_data_len = beacon->tail_len;
3662 break;
3663 case NL80211_IFTYPE_ADHOC:
3664 beacon_data = beacon->head;
3665 beacon_data_len = beacon->head_len;
3666 break;
b8456a14
CYY		 3667 case NL80211_IFTYPE_MESH_POINT:
3668 beacon_data = beacon->head;
3669 beacon_data_len = beacon->head_len;
3670 break;
cd7760e6
SW		 3671 default:
3672 return;
3673 }
73da7d5b 3674
af296bdb 3675 rcu_read_lock();
0d06d9ba 3676 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
af296bdb 3677 resp = rcu_dereference(sdata->u.ap.probe_resp);
0d06d9ba 3678
af296bdb
MK		 3679 if (beacon->csa_counter_offsets[i]) {
3680 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
3681 beacon_data_len)) {
0d06d9ba
AO		 3682 rcu_read_unlock();
3683 return;
3684 }
af296bdb
MK		 3685
3686 beacon_data[beacon->csa_counter_offsets[i]] = count;
73da7d5b 3687 }
af296bdb
MK		 3688
3689 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
3690 resp->data[resp->csa_counter_offsets[i]] = count;
73da7d5b 3691 }
af296bdb 3692 rcu_read_unlock();
1af586c9
AO		 3693}
3694
e996ec2a
WD		 3695static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
3696{
3697 beacon->csa_current_counter--;
3698
3699 /* the counter should never reach 0 */
3700 WARN_ON_ONCE(!beacon->csa_current_counter);
3701
3702 return beacon->csa_current_counter;
3703}
3704
1af586c9
AO		 3705u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
3706{
3707 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
af296bdb
MK		 3708 struct beacon_data *beacon = NULL;
3709 u8 count = 0;
0d06d9ba 3710
af296bdb
MK		 3711 rcu_read_lock();
3712
3713 if (sdata->vif.type == NL80211_IFTYPE_AP)
3714 beacon = rcu_dereference(sdata->u.ap.beacon);
3715 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3716 beacon = rcu_dereference(sdata->u.ibss.presp);
3717 else if (ieee80211_vif_is_mesh(&sdata->vif))
3718 beacon = rcu_dereference(sdata->u.mesh.beacon);
3719
3720 if (!beacon)
3721 goto unlock;
3722
e996ec2a 3723 count = __ieee80211_csa_update_counter(beacon);
1af586c9 3724
af296bdb
MK		 3725unlock:
3726 rcu_read_unlock();
3727 return count;
73da7d5b 3728}
1af586c9 3729EXPORT_SYMBOL(ieee80211_csa_update_counter);
73da7d5b
SW		 3730
3731bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
3732{
3733 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3734 struct beacon_data *beacon = NULL;
3735 u8 *beacon_data;
3736 size_t beacon_data_len;
73da7d5b
SW		 3737 int ret = false;
3738
3739 if (!ieee80211_sdata_running(sdata))
3740 return false;
3741
3742 rcu_read_lock();
3743 if (vif->type == NL80211_IFTYPE_AP) {
3744 struct ieee80211_if_ap *ap = &sdata->u.ap;
3745
3746 beacon = rcu_dereference(ap->beacon);
3747 if (WARN_ON(!beacon || !beacon->tail))
3748 goto out;
3749 beacon_data = beacon->tail;
3750 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 3751 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
3752 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3753
3754 beacon = rcu_dereference(ifibss->presp);
3755 if (!beacon)
3756 goto out;
3757
b8456a14
CYY		 3758 beacon_data = beacon->head;
3759 beacon_data_len = beacon->head_len;
3760 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
3761 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3762
3763 beacon = rcu_dereference(ifmsh->beacon);
3764 if (!beacon)
3765 goto out;
3766
cd7760e6
SW		 3767 beacon_data = beacon->head;
3768 beacon_data_len = beacon->head_len;
73da7d5b
SW		 3769 } else {
3770 WARN_ON(1);
3771 goto out;
3772 }
3773
10d78f27
MK		 3774 if (!beacon->csa_counter_offsets[0])
3775 goto out;
3776
af296bdb 3777 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 3778 goto out;
3779
af296bdb 3780 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
73da7d5b
SW		 3781 ret = true;
3782 out:
3783 rcu_read_unlock();
3784
3785 return ret;
3786}
3787EXPORT_SYMBOL(ieee80211_csa_is_complete);
3788
6ec8c332
AO		 3789static struct sk_buff *
3790__ieee80211_beacon_get(struct ieee80211_hw *hw,
3791 struct ieee80211_vif *vif,
3792 struct ieee80211_mutable_offsets *offs,
3793 bool is_template)
e2ebc74d
JB		 3794{
3795 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 3796 struct beacon_data *beacon = NULL;
9d139c81 3797 struct sk_buff *skb = NULL;
e039fa4a 3798 struct ieee80211_tx_info *info;
e2ebc74d 3799 struct ieee80211_sub_if_data *sdata = NULL;
57fbcce3 3800 enum nl80211_band band;
e00cfce0 3801 struct ieee80211_tx_rate_control txrc;
55de908a 3802 struct ieee80211_chanctx_conf *chanctx_conf;
1af586c9 3803 int csa_off_base = 0;
8318d78a 3804
5dfdaf58 3805 rcu_read_lock();
e2ebc74d 3806
32bfd35d 3807 sdata = vif_to_sdata(vif);
55de908a 3808 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 3809
55de908a 3810 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 3811 goto out;
3812
6ec8c332
AO		 3813 if (offs)
3814 memset(offs, 0, sizeof(*offs));
eddcbb94 3815
05c914fe 3816 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605 3817 struct ieee80211_if_ap *ap = &sdata->u.ap;
d012a605 3818
af296bdb 3819 beacon = rcu_dereference(ap->beacon);
3ad97fbc 3820 if (beacon) {
10d78f27 3821 if (beacon->csa_counter_offsets[0]) {
1af586c9 3822 if (!is_template)
e996ec2a 3823 __ieee80211_csa_update_counter(beacon);
1af586c9
AO		 3824
3825 ieee80211_set_csa(sdata, beacon);
3826 }
73da7d5b 3827
902acc78
JB		 3828 /*
3829 * headroom, head length,
3830 * tail length and maximum TIM length
3831 */
3832 skb = dev_alloc_skb(local->tx_headroom +
3833 beacon->head_len +
70dabeb7
FF		 3834 beacon->tail_len + 256 +
3835 local->hw.extra_beacon_tailroom);
902acc78
JB		 3836 if (!skb)
3837 goto out;
33b64eb2 3838
902acc78
JB		 3839 skb_reserve(skb, local->tx_headroom);
3840 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3841 beacon->head_len);
33b64eb2 3842
6ec8c332
AO		 3843 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
3844 is_template);
33b64eb2 3845
6ec8c332
AO		 3846 if (offs) {
3847 offs->tim_offset = beacon->head_len;
3848 offs->tim_length = skb->len - beacon->head_len;
1af586c9
AO		 3849
3850 /* for AP the csa offsets are from tail */
3851 csa_off_base = skb->len;
6ec8c332 3852 }
eddcbb94 3853
902acc78
JB		 3854 if (beacon->tail)
3855 memcpy(skb_put(skb, beacon->tail_len),
3856 beacon->tail, beacon->tail_len);
9d139c81
JB		 3857 } else
3858 goto out;
05c914fe 3859 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 3860 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 3861 struct ieee80211_hdr *hdr;
33b64eb2 3862
af296bdb
MK		 3863 beacon = rcu_dereference(ifibss->presp);
3864 if (!beacon)
9d139c81
JB		 3865 goto out;
3866
10d78f27 3867 if (beacon->csa_counter_offsets[0]) {
1af586c9 3868 if (!is_template)
e996ec2a 3869 __ieee80211_csa_update_counter(beacon);
cd7760e6 3870
af296bdb 3871 ieee80211_set_csa(sdata, beacon);
1af586c9 3872 }
cd7760e6 3873
af296bdb 3874 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 3875 local->hw.extra_beacon_tailroom);
9d139c81
JB		 3876 if (!skb)
3877 goto out;
c3ffeab4 3878 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 3879 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3880 beacon->head_len);
9d139c81
JB		 3881
3882 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 3883 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3884 IEEE80211_STYPE_BEACON);
902acc78 3885 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 3886 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 3887
af296bdb
MK		 3888 beacon = rcu_dereference(ifmsh->beacon);
3889 if (!beacon)
ac1bd846 3890 goto out;
ac1bd846 3891
10d78f27 3892 if (beacon->csa_counter_offsets[0]) {
1af586c9
AO		 3893 if (!is_template)
3894 /* TODO: For mesh csa_counter is in TU, so
3895 * decrementing it by one isn't correct, but
3896 * for now we leave it consistent with overall
3897 * mac80211's behavior.
3898 */
e996ec2a 3899 __ieee80211_csa_update_counter(beacon);
1af586c9 3900
af296bdb 3901 ieee80211_set_csa(sdata, beacon);
1af586c9 3902 }
b8456a14 3903
dbf498fb 3904 if (ifmsh->sync_ops)
af296bdb 3905 ifmsh->sync_ops->adjust_tbtt(sdata, beacon);
dbf498fb 3906
3b69a9c5 3907 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 3908 beacon->head_len +
3f52b7e3 3909 256 + /* TIM IE */
af296bdb 3910 beacon->tail_len +
70dabeb7 3911 local->hw.extra_beacon_tailroom);
902acc78
JB		 3912 if (!skb)
3913 goto out;
2b5e1967 3914 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 3915 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3916 beacon->head_len);
6ec8c332
AO		 3917 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
3918
3919 if (offs) {
af296bdb
MK		 3920 offs->tim_offset = beacon->head_len;
3921 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 3922 }
3923
af296bdb
MK		 3924 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
3925 beacon->tail_len);
9d139c81
JB		 3926 } else {
3927 WARN_ON(1);
5dfdaf58 3928 goto out;
e2ebc74d
JB		 3929 }
3930
1af586c9 3931 /* CSA offsets */
af296bdb 3932 if (offs && beacon) {
1af586c9
AO		 3933 int i;
3934
3935 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
af296bdb 3936 u16 csa_off = beacon->csa_counter_offsets[i];
1af586c9
AO		 3937
3938 if (!csa_off)
3939 continue;
3940
3941 offs->csa_counter_offs[i] = csa_off_base + csa_off;
3942 }
3943 }
3944
4bf88530 3945 band = chanctx_conf->def.chan->band;
55de908a 3946
e039fa4a
JB		 3947 info = IEEE80211_SKB_CB(skb);
3948
3b8d81e0 3949 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 3950 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 3951 info->band = band;
e00cfce0
JM		 3952
3953 memset(&txrc, 0, sizeof(txrc));
3954 txrc.hw = hw;
e31583cd 3955 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 3956 txrc.bss_conf = &sdata->vif.bss_conf;
3957 txrc.skb = skb;
3958 txrc.reported_rate.idx = -1;
37eb0b16 3959 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
e31583cd 3960 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
37eb0b16
JM		 3961 txrc.max_rate_idx = -1;
3962 else
3963 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
8f0729b1 3964 txrc.bss = true;
e00cfce0 3965 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 3966
3967 info->control.vif = vif;
f591fa5d 3968
a472e71b
JL		 3969 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
3970 IEEE80211_TX_CTL_ASSIGN_SEQ |
3971 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 3972 out:
5dfdaf58 3973 rcu_read_unlock();
e2ebc74d 3974 return skb;
6ec8c332
AO		 3975
3976}
3977
3978struct sk_buff *
3979ieee80211_beacon_get_template(struct ieee80211_hw *hw,
3980 struct ieee80211_vif *vif,
3981 struct ieee80211_mutable_offsets *offs)
3982{
3983 return __ieee80211_beacon_get(hw, vif, offs, true);
3984}
3985EXPORT_SYMBOL(ieee80211_beacon_get_template);
3986
3987struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
3988 struct ieee80211_vif *vif,
3989 u16 *tim_offset, u16 *tim_length)
3990{
3991 struct ieee80211_mutable_offsets offs = {};
3992 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
35afa588
HS		 3993 struct sk_buff *copy;
3994 struct ieee80211_supported_band *sband;
3995 int shift;
3996
3997 if (!bcn)
3998 return bcn;
6ec8c332
AO		 3999
4000 if (tim_offset)
4001 *tim_offset = offs.tim_offset;
4002
4003 if (tim_length)
4004 *tim_length = offs.tim_length;
4005
35afa588
HS		 4006 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4007 !hw_to_local(hw)->monitors)
4008 return bcn;
4009
4010 /* send a copy to monitor interfaces */
4011 copy = skb_copy(bcn, GFP_ATOMIC);
4012 if (!copy)
4013 return bcn;
4014
4015 shift = ieee80211_vif_get_shift(vif);
4016 sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))];
4017 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4018
6ec8c332 4019 return bcn;
e2ebc74d 4020}
eddcbb94 4021EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 4022
02945821
AN		 4023struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4024 struct ieee80211_vif *vif)
4025{
4026 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 4027 struct sk_buff *skb = NULL;
4028 struct probe_resp *presp = NULL;
02945821
AN		 4029 struct ieee80211_hdr *hdr;
4030 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4031
4032 if (sdata->vif.type != NL80211_IFTYPE_AP)
4033 return NULL;
4034
4035 rcu_read_lock();
4036
4037 ap = &sdata->u.ap;
4038 presp = rcu_dereference(ap->probe_resp);
4039 if (!presp)
4040 goto out;
4041
aa7a0080 4042 skb = dev_alloc_skb(presp->len);
02945821
AN		 4043 if (!skb)
4044 goto out;
4045
aa7a0080
ES		 4046 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
4047
02945821
AN		 4048 hdr = (struct ieee80211_hdr *) skb->data;
4049 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4050
4051out:
4052 rcu_read_unlock();
4053 return skb;
4054}
4055EXPORT_SYMBOL(ieee80211_proberesp_get);
4056
7044cc56
KV		 4057struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4058 struct ieee80211_vif *vif)
4059{
4060 struct ieee80211_sub_if_data *sdata;
4061 struct ieee80211_if_managed *ifmgd;
4062 struct ieee80211_pspoll *pspoll;
4063 struct ieee80211_local *local;
4064 struct sk_buff *skb;
4065
4066 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4067 return NULL;
4068
4069 sdata = vif_to_sdata(vif);
4070 ifmgd = &sdata->u.mgd;
4071 local = sdata->local;
4072
4073 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 4074 if (!skb)
7044cc56 4075 return NULL;
d15b8459 4076
7044cc56
KV		 4077 skb_reserve(skb, local->hw.extra_tx_headroom);
4078
4079 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
4080 memset(pspoll, 0, sizeof(*pspoll));
4081 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4082 IEEE80211_STYPE_PSPOLL);
4083 pspoll->aid = cpu_to_le16(ifmgd->aid);
4084
4085 /* aid in PS-Poll has its two MSBs each set to 1 */
4086 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4087
4088 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4089 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4090
4091 return skb;
4092}
4093EXPORT_SYMBOL(ieee80211_pspoll_get);
4094
4095struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4096 struct ieee80211_vif *vif)
4097{
4098 struct ieee80211_hdr_3addr *nullfunc;
4099 struct ieee80211_sub_if_data *sdata;
4100 struct ieee80211_if_managed *ifmgd;
4101 struct ieee80211_local *local;
4102 struct sk_buff *skb;
4103
4104 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4105 return NULL;
4106
4107 sdata = vif_to_sdata(vif);
4108 ifmgd = &sdata->u.mgd;
4109 local = sdata->local;
4110
4111 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
d15b8459 4112 if (!skb)
7044cc56 4113 return NULL;
d15b8459 4114
7044cc56
KV		 4115 skb_reserve(skb, local->hw.extra_tx_headroom);
4116
4117 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
4118 sizeof(*nullfunc));
4119 memset(nullfunc, 0, sizeof(*nullfunc));
4120 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4121 IEEE80211_STYPE_NULLFUNC |
4122 IEEE80211_FCTL_TODS);
4123 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4124 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4125 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4126
4127 return skb;
4128}
4129EXPORT_SYMBOL(ieee80211_nullfunc_get);
4130
05e54ea6 4131struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 4132 const u8 *src_addr,
05e54ea6 4133 const u8 *ssid, size_t ssid_len,
b9a9ada1 4134 size_t tailroom)
05e54ea6 4135{
a344d677 4136 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 4137 struct ieee80211_hdr_3addr *hdr;
4138 struct sk_buff *skb;
4139 size_t ie_ssid_len;
4140 u8 *pos;
4141
05e54ea6
KV		 4142 ie_ssid_len = 2 + ssid_len;
4143
4144 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 4145 ie_ssid_len + tailroom);
d15b8459 4146 if (!skb)
05e54ea6 4147 return NULL;
05e54ea6
KV		 4148
4149 skb_reserve(skb, local->hw.extra_tx_headroom);
4150
4151 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
4152 memset(hdr, 0, sizeof(*hdr));
4153 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4154 IEEE80211_STYPE_PROBE_REQ);
e83e6541 4155 eth_broadcast_addr(hdr->addr1);
a344d677 4156 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 4157 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 4158
4159 pos = skb_put(skb, ie_ssid_len);
4160 *pos++ = WLAN_EID_SSID;
4161 *pos++ = ssid_len;
88c868c4 4162 if (ssid_len)
05e54ea6
KV		 4163 memcpy(pos, ssid, ssid_len);
4164 pos += ssid_len;
4165
05e54ea6
KV		 4166 return skb;
4167}
4168EXPORT_SYMBOL(ieee80211_probereq_get);
4169
32bfd35d 4170void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4171 const void *frame, size_t frame_len,
e039fa4a 4172 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4173 struct ieee80211_rts *rts)
4174{
4175 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4176
065e9605
HH		 4177 rts->frame_control =
4178 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 4179 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4180 frame_txctl);
e2ebc74d
JB		 4181 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4182 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4183}
4184EXPORT_SYMBOL(ieee80211_rts_get);
4185
32bfd35d 4186void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4187 const void *frame, size_t frame_len,
e039fa4a 4188 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4189 struct ieee80211_cts *cts)
4190{
4191 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4192
065e9605
HH		 4193 cts->frame_control =
4194 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 4195 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4196 frame_len, frame_txctl);
e2ebc74d
JB		 4197 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4198}
4199EXPORT_SYMBOL(ieee80211_ctstoself_get);
4200
4201struct sk_buff *
32bfd35d 4202ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 4203 struct ieee80211_vif *vif)
e2ebc74d
JB		 4204{
4205 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 4206 struct sk_buff *skb = NULL;
5cf121c3 4207 struct ieee80211_tx_data tx;
e2ebc74d 4208 struct ieee80211_sub_if_data *sdata;
d012a605 4209 struct ps_data *ps;
e039fa4a 4210 struct ieee80211_tx_info *info;
55de908a 4211 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 4212
32bfd35d 4213 sdata = vif_to_sdata(vif);
5dfdaf58 4214
5dfdaf58 4215 rcu_read_lock();
55de908a 4216 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 4217
d012a605
MP		 4218 if (!chanctx_conf)
4219 goto out;
4220
4221 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4222 struct beacon_data *beacon =
4223 rcu_dereference(sdata->u.ap.beacon);
4224
4225 if (!beacon || !beacon->head)
4226 goto out;
4227
4228 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 4229 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4230 ps = &sdata->u.mesh.ps;
d012a605 4231 } else {
747cf5e9 4232 goto out;
d012a605 4233 }
5dfdaf58 4234
d012a605 4235 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 4236 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 4237
e2ebc74d 4238 while (1) {
d012a605 4239 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 4240 if (!skb)
747cf5e9 4241 goto out;
e2ebc74d
JB		 4242 local->total_ps_buffered--;
4243
d012a605 4244 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 4245 struct ieee80211_hdr *hdr =
4246 (struct ieee80211_hdr *) skb->data;
4247 /* more buffered multicast/broadcast frames ==> set
4248 * MoreData flag in IEEE 802.11 header to inform PS
4249 * STAs */
4250 hdr->frame_control |=
4251 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4252 }
4253
112c44b2 4254 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 4255 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 4256 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 4257 break;
6b07d9ca 4258 ieee80211_free_txskb(hw, skb);
e2ebc74d 4259 }
e039fa4a
JB		 4260
4261 info = IEEE80211_SKB_CB(skb);
4262
5cf121c3 4263 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 4264 info->band = chanctx_conf->def.chan->band;
e2ebc74d 4265
97b045d6 4266 if (invoke_tx_handlers(&tx))
e2ebc74d 4267 skb = NULL;
97b045d6 4268 out:
d0709a65 4269 rcu_read_unlock();
e2ebc74d
JB		 4270
4271 return skb;
4272}
4273EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 4274
b6da911b
LK		 4275int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4276{
4277 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4278 struct ieee80211_sub_if_data *sdata = sta->sdata;
4279 struct ieee80211_local *local = sdata->local;
4280 int ret;
4281 u32 queues;
4282
4283 lockdep_assert_held(&local->sta_mtx);
4284
4285 /* only some cases are supported right now */
4286 switch (sdata->vif.type) {
4287 case NL80211_IFTYPE_STATION:
4288 case NL80211_IFTYPE_AP:
4289 case NL80211_IFTYPE_AP_VLAN:
4290 break;
4291 default:
4292 WARN_ON(1);
4293 return -EINVAL;
4294 }
4295
4296 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4297 return -EINVAL;
4298
4299 if (sta->reserved_tid == tid) {
4300 ret = 0;
4301 goto out;
4302 }
4303
4304 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4305 sdata_err(sdata, "TID reservation already active\n");
4306 ret = -EALREADY;
4307 goto out;
4308 }
4309
4310 ieee80211_stop_vif_queues(sdata->local, sdata,
4311 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4312
4313 synchronize_net();
4314
4315 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 4316 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 4317 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4318 __ieee80211_stop_tx_ba_session(sta, tid,
4319 AGG_STOP_LOCAL_REQUEST);
4320 }
4321
4322 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 4323 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 4324
4325 sta->reserved_tid = tid;
4326
4327 ieee80211_wake_vif_queues(local, sdata,
4328 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4329
30686bf7 4330 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 4331 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4332
4333 ret = 0;
4334 out:
4335 return ret;
4336}
4337EXPORT_SYMBOL(ieee80211_reserve_tid);
4338
4339void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4340{
4341 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4342 struct ieee80211_sub_if_data *sdata = sta->sdata;
4343
4344 lockdep_assert_held(&sdata->local->sta_mtx);
4345
4346 /* only some cases are supported right now */
4347 switch (sdata->vif.type) {
4348 case NL80211_IFTYPE_STATION:
4349 case NL80211_IFTYPE_AP:
4350 case NL80211_IFTYPE_AP_VLAN:
4351 break;
4352 default:
4353 WARN_ON(1);
4354 return;
4355 }
4356
4357 if (tid != sta->reserved_tid) {
4358 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4359 return;
4360 }
4361
4362 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4363}
4364EXPORT_SYMBOL(ieee80211_unreserve_tid);
4365
55de908a
JB		 4366void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4367 struct sk_buff *skb, int tid,
57fbcce3 4368 enum nl80211_band band)
3b8d81e0 4369{
353d09c6 4370 int ac = ieee802_1d_to_ac[tid & 7];
3a25a8c8 4371
d57a544d 4372 skb_reset_mac_header(skb);
3a25a8c8 4373 skb_set_queue_mapping(skb, ac);
cf6bb79a 4374 skb->priority = tid;
cf0277e7 4375
89afe614
JB		 4376 skb->dev = sdata->dev;
4377
3d34deb6
JB		 4378 /*
4379 * The other path calling ieee80211_xmit is from the tasklet,
4380 * and while we can handle concurrent transmissions locking
4381 * requirements are that we do not come into tx with bhs on.
4382 */
4383 local_bh_disable();
73c4e195 4384 IEEE80211_SKB_CB(skb)->band = band;
7c10770f 4385 ieee80211_xmit(sdata, NULL, skb);
3d34deb6 4386 local_bh_enable();
3b8d81e0 4387}
Linux kernel - Deliverables
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