status.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright 2002-2005, Instant802 Networks, Inc.
   4 * Copyright 2005-2006, Devicescape Software, Inc.
   5 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
   6 * Copyright 2008-2010	Johannes Berg <johannes@sipsolutions.net>
   7 * Copyright 2013-2014  Intel Mobile Communications GmbH
   8 * Copyright 2021-2025  Intel Corporation
   9 */
  10
  11#include <linux/export.h>
  12#include <linux/etherdevice.h>
  13#include <net/mac80211.h>
  14#include <linux/unaligned.h>
  15#include "ieee80211_i.h"
  16#include "rate.h"
  17#include "mesh.h"
  18#include "led.h"
  19#include "wme.h"
  20
  21
  22void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
  23				 struct sk_buff *skb)
  24{
  25	struct ieee80211_local *local = hw_to_local(hw);
  26	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  27	int tmp;
  28
  29	skb->pkt_type = IEEE80211_TX_STATUS_MSG;
  30	skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
  31		       &local->skb_queue : &local->skb_queue_unreliable, skb);
  32	tmp = skb_queue_len(&local->skb_queue) +
  33		skb_queue_len(&local->skb_queue_unreliable);
  34	while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
  35	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
  36		ieee80211_free_txskb(hw, skb);
  37		tmp--;
  38		I802_DEBUG_INC(local->tx_status_drop);
  39	}
  40	tasklet_schedule(&local->tasklet);
  41}
  42EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
  43
  44static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
  45					    struct sta_info *sta,
  46					    struct sk_buff *skb)
  47{
  48	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  49	struct ieee80211_hdr *hdr = (void *)skb->data;
  50	int ac;
  51
  52	if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
  53			   IEEE80211_TX_CTL_AMPDU |
  54			   IEEE80211_TX_CTL_HW_80211_ENCAP)) {
  55		ieee80211_free_txskb(&local->hw, skb);
  56		return;
  57	}
  58
  59	/*
  60	 * This skb 'survived' a round-trip through the driver, and
  61	 * hopefully the driver didn't mangle it too badly. However,
  62	 * we can definitely not rely on the control information
  63	 * being correct. Clear it so we don't get junk there, and
  64	 * indicate that it needs new processing, but must not be
  65	 * modified/encrypted again.
  66	 */
  67	memset(&info->control, 0, sizeof(info->control));
  68
  69	info->control.jiffies = jiffies;
  70	info->control.vif = &sta->sdata->vif;
  71	info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
  72	info->flags |= IEEE80211_TX_INTFL_RETRANSMISSION;
  73	info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
  74
  75	sta->deflink.status_stats.filtered++;
  76
  77	/*
  78	 * Clear more-data bit on filtered frames, it might be set
  79	 * but later frames might time out so it might have to be
  80	 * clear again ... It's all rather unlikely (this frame
  81	 * should time out first, right?) but let's not confuse
  82	 * peers unnecessarily.
  83	 */
  84	if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
  85		hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
  86
  87	if (ieee80211_is_data_qos(hdr->frame_control)) {
  88		u8 *p = ieee80211_get_qos_ctl(hdr);
  89		int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
  90
  91		/*
  92		 * Clear EOSP if set, this could happen e.g.
  93		 * if an absence period (us being a P2P GO)
  94		 * shortens the SP.
  95		 */
  96		if (*p & IEEE80211_QOS_CTL_EOSP)
  97			*p &= ~IEEE80211_QOS_CTL_EOSP;
  98		ac = ieee80211_ac_from_tid(tid);
  99	} else {
 100		ac = IEEE80211_AC_BE;
 101	}
 102
 103	/*
 104	 * Clear the TX filter mask for this STA when sending the next
 105	 * packet. If the STA went to power save mode, this will happen
 106	 * when it wakes up for the next time.
 107	 */
 108	set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
 109	ieee80211_clear_fast_xmit(sta);
 110
 111	/*
 112	 * This code races in the following way:
 113	 *
 114	 *  (1) STA sends frame indicating it will go to sleep and does so
 115	 *  (2) hardware/firmware adds STA to filter list, passes frame up
 116	 *  (3) hardware/firmware processes TX fifo and suppresses a frame
 117	 *  (4) we get TX status before having processed the frame and
 118	 *	knowing that the STA has gone to sleep.
 119	 *
 120	 * This is actually quite unlikely even when both those events are
 121	 * processed from interrupts coming in quickly after one another or
 122	 * even at the same time because we queue both TX status events and
 123	 * RX frames to be processed by a tasklet and process them in the
 124	 * same order that they were received or TX status last. Hence, there
 125	 * is no race as long as the frame RX is processed before the next TX
 126	 * status, which drivers can ensure, see below.
 127	 *
 128	 * Note that this can only happen if the hardware or firmware can
 129	 * actually add STAs to the filter list, if this is done by the
 130	 * driver in response to set_tim() (which will only reduce the race
 131	 * this whole filtering tries to solve, not completely solve it)
 132	 * this situation cannot happen.
 133	 *
 134	 * To completely solve this race drivers need to make sure that they
 135	 *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
 136	 *	functions and
 137	 *  (b) always process RX events before TX status events if ordering
 138	 *      can be unknown, for example with different interrupt status
 139	 *	bits.
 140	 *  (c) if PS mode transitions are manual (i.e. the flag
 141	 *      %IEEE80211_HW_AP_LINK_PS is set), always process PS state
 142	 *      changes before calling TX status events if ordering can be
 143	 *	unknown.
 144	 */
 145	if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
 146	    skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
 147		skb_queue_tail(&sta->tx_filtered[ac], skb);
 148		sta_info_recalc_tim(sta);
 149
 150		if (!timer_pending(&local->sta_cleanup))
 151			mod_timer(&local->sta_cleanup,
 152				  round_jiffies(jiffies +
 153						STA_INFO_CLEANUP_INTERVAL));
 154		return;
 155	}
 156
 157	if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
 158	    !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
 159		/* Software retry the packet once */
 160		info->flags |= IEEE80211_TX_INTFL_RETRIED;
 161		ieee80211_add_pending_skb(local, skb);
 162		return;
 163	}
 164
 165	ps_dbg_ratelimited(sta->sdata,
 166			   "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
 167			   skb_queue_len(&sta->tx_filtered[ac]),
 168			   !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
 169	ieee80211_free_txskb(&local->hw, skb);
 170}
 171
 172static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
 173{
 174	struct tid_ampdu_tx *tid_tx;
 175
 176	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
 177	if (!tid_tx || !tid_tx->bar_pending)
 178		return;
 179
 180	tid_tx->bar_pending = false;
 181	ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
 182}
 183
 184static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
 185{
 186	struct ieee80211_mgmt *mgmt = (void *) skb->data;
 187
 188	if (ieee80211_is_data_qos(mgmt->frame_control)) {
 189		struct ieee80211_hdr *hdr = (void *) skb->data;
 190		u8 *qc = ieee80211_get_qos_ctl(hdr);
 191		u16 tid = qc[0] & 0xf;
 192
 193		ieee80211_check_pending_bar(sta, hdr->addr1, tid);
 194	}
 195}
 196
 197static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
 198{
 199	struct tid_ampdu_tx *tid_tx;
 200
 201	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
 202	if (!tid_tx)
 203		return;
 204
 205	tid_tx->failed_bar_ssn = ssn;
 206	tid_tx->bar_pending = true;
 207}
 208
 209static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
 210				     struct ieee80211_tx_status *status)
 211{
 212	struct ieee80211_rate_status *status_rate = NULL;
 213	int len = sizeof(struct ieee80211_radiotap_header);
 214
 215	if (status && status->n_rates)
 216		status_rate = &status->rates[status->n_rates - 1];
 217
 218	/* IEEE80211_RADIOTAP_RATE rate */
 219	if (status_rate && !(status_rate->rate_idx.flags &
 220						(RATE_INFO_FLAGS_MCS |
 221						 RATE_INFO_FLAGS_DMG |
 222						 RATE_INFO_FLAGS_EDMG |
 223						 RATE_INFO_FLAGS_VHT_MCS |
 224						 RATE_INFO_FLAGS_HE_MCS)))
 225		len += 2;
 226	else if (info->status.rates[0].idx >= 0 &&
 227		 !(info->status.rates[0].flags &
 228		   (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
 229		len += 2;
 230
 231	/* IEEE80211_RADIOTAP_TX_FLAGS */
 232	len += 2;
 233
 234	/* IEEE80211_RADIOTAP_DATA_RETRIES */
 235	len += 1;
 236
 237	/* IEEE80211_RADIOTAP_MCS
 238	 * IEEE80211_RADIOTAP_VHT */
 239	if (status_rate) {
 240		if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS)
 241			len += 3;
 242		else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_VHT_MCS)
 243			len = ALIGN(len, 2) + 12;
 244		else if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_HE_MCS)
 245			len = ALIGN(len, 2) + 12;
 246	} else if (info->status.rates[0].idx >= 0) {
 247		if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
 248			len += 3;
 249		else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
 250			len = ALIGN(len, 2) + 12;
 251	}
 252
 253	return len;
 254}
 255
 256static void
 257ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
 258				 struct sk_buff *skb, int retry_count,
 259				 int rtap_len,
 260				 struct ieee80211_tx_status *status)
 261{
 262	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 263	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 264	struct ieee80211_radiotap_header *rthdr;
 265	struct ieee80211_rate_status *status_rate = NULL;
 266	unsigned char *pos;
 267	u16 legacy_rate = 0;
 268	u16 txflags;
 269
 270	if (status && status->n_rates)
 271		status_rate = &status->rates[status->n_rates - 1];
 272
 273	rthdr = skb_push(skb, rtap_len);
 274
 275	memset(rthdr, 0, rtap_len);
 276	rthdr->it_len = cpu_to_le16(rtap_len);
 277	rthdr->it_present =
 278		cpu_to_le32(BIT(IEEE80211_RADIOTAP_TX_FLAGS) |
 279			    BIT(IEEE80211_RADIOTAP_DATA_RETRIES));
 280	pos = (unsigned char *)(rthdr + 1);
 281
 282	/*
 283	 * XXX: Once radiotap gets the bitmap reset thing the vendor
 284	 *	extensions proposal contains, we can actually report
 285	 *	the whole set of tries we did.
 286	 */
 287
 288	/* IEEE80211_RADIOTAP_RATE */
 289
 290	if (status_rate) {
 291		if (!(status_rate->rate_idx.flags &
 292						(RATE_INFO_FLAGS_MCS |
 293						 RATE_INFO_FLAGS_DMG |
 294						 RATE_INFO_FLAGS_EDMG |
 295						 RATE_INFO_FLAGS_VHT_MCS |
 296						 RATE_INFO_FLAGS_HE_MCS)))
 297			legacy_rate = status_rate->rate_idx.legacy;
 298	} else if (info->status.rates[0].idx >= 0 &&
 299		 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
 300						  IEEE80211_TX_RC_VHT_MCS))) {
 301		struct ieee80211_supported_band *sband;
 302
 303		sband = local->hw.wiphy->bands[info->band];
 304		legacy_rate =
 305			sband->bitrates[info->status.rates[0].idx].bitrate;
 306	}
 307
 308	if (legacy_rate) {
 309		rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_RATE));
 310		*pos = DIV_ROUND_UP(legacy_rate, 5);
 311		/* padding for tx flags */
 312		pos += 2;
 313	}
 314
 315	/* IEEE80211_RADIOTAP_TX_FLAGS */
 316	txflags = 0;
 317	if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
 318	    !is_multicast_ether_addr(hdr->addr1))
 319		txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
 320
 321	if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
 322		txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
 323	if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
 324		txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
 325
 326	put_unaligned_le16(txflags, pos);
 327	pos += 2;
 328
 329	/* IEEE80211_RADIOTAP_DATA_RETRIES */
 330	/* for now report the total retry_count */
 331	*pos = retry_count;
 332	pos++;
 333
 334	if (status_rate && (status_rate->rate_idx.flags & RATE_INFO_FLAGS_MCS))
 335	{
 336		rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
 337		pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 338			 IEEE80211_RADIOTAP_MCS_HAVE_GI |
 339			 IEEE80211_RADIOTAP_MCS_HAVE_BW;
 340		if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
 341			pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
 342		if (status_rate->rate_idx.bw == RATE_INFO_BW_40)
 343			pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
 344		pos[2] = status_rate->rate_idx.mcs;
 345		pos += 3;
 346	} else if (status_rate && (status_rate->rate_idx.flags &
 347					RATE_INFO_FLAGS_VHT_MCS))
 348	{
 349		u16 known = local->hw.radiotap_vht_details &
 350			(IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 351			 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
 352
 353		rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
 354
 355		/* required alignment from rthdr */
 356		pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 357
 358		/* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
 359		put_unaligned_le16(known, pos);
 360		pos += 2;
 361
 362		/* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
 363		if (status_rate->rate_idx.flags & RATE_INFO_FLAGS_SHORT_GI)
 364			*pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
 365		pos++;
 366
 367		/* u8 bandwidth */
 368		switch (status_rate->rate_idx.bw) {
 369		case RATE_INFO_BW_160:
 370			*pos = 11;
 371			break;
 372		case RATE_INFO_BW_80:
 373			*pos = 4;
 374			break;
 375		case RATE_INFO_BW_40:
 376			*pos = 1;
 377			break;
 378		default:
 379			*pos = 0;
 380			break;
 381		}
 382		pos++;
 383
 384		/* u8 mcs_nss[4] */
 385		*pos = (status_rate->rate_idx.mcs << 4) |
 386				status_rate->rate_idx.nss;
 387		pos += 4;
 388
 389		/* u8 coding */
 390		pos++;
 391		/* u8 group_id */
 392		pos++;
 393		/* u16 partial_aid */
 394		pos += 2;
 395	} else if (status_rate && (status_rate->rate_idx.flags &
 396					RATE_INFO_FLAGS_HE_MCS))
 397	{
 398		struct ieee80211_radiotap_he *he;
 399
 400		rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_HE));
 401
 402		/* required alignment from rthdr */
 403		pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 404		he = (struct ieee80211_radiotap_he *)pos;
 405
 406		he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
 407					IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
 408					IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
 409					IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
 410
 411		he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
 412
 413#define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
 414
 415		he->data6 |= HE_PREP(DATA6_NSTS, status_rate->rate_idx.nss);
 416
 417#define CHECK_GI(s) \
 418	BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
 419	(int)NL80211_RATE_INFO_HE_GI_##s)
 420
 421		CHECK_GI(0_8);
 422		CHECK_GI(1_6);
 423		CHECK_GI(3_2);
 424
 425		he->data3 |= HE_PREP(DATA3_DATA_MCS, status_rate->rate_idx.mcs);
 426		he->data3 |= HE_PREP(DATA3_DATA_DCM, status_rate->rate_idx.he_dcm);
 427
 428		he->data5 |= HE_PREP(DATA5_GI, status_rate->rate_idx.he_gi);
 429
 430		switch (status_rate->rate_idx.bw) {
 431		case RATE_INFO_BW_20:
 432			he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 433					     IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
 434			break;
 435		case RATE_INFO_BW_40:
 436			he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 437					     IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
 438			break;
 439		case RATE_INFO_BW_80:
 440			he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 441					     IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
 442			break;
 443		case RATE_INFO_BW_160:
 444			he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 445					     IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
 446			break;
 447		case RATE_INFO_BW_HE_RU:
 448#define CHECK_RU_ALLOC(s) \
 449	BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
 450	NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
 451
 452			CHECK_RU_ALLOC(26);
 453			CHECK_RU_ALLOC(52);
 454			CHECK_RU_ALLOC(106);
 455			CHECK_RU_ALLOC(242);
 456			CHECK_RU_ALLOC(484);
 457			CHECK_RU_ALLOC(996);
 458			CHECK_RU_ALLOC(2x996);
 459
 460			he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 461					     status_rate->rate_idx.he_ru_alloc + 4);
 462			break;
 463		default:
 464			WARN_ONCE(1, "Invalid SU BW %d\n", status_rate->rate_idx.bw);
 465		}
 466
 467		pos += sizeof(struct ieee80211_radiotap_he);
 468	}
 469
 470	if (status_rate || info->status.rates[0].idx < 0)
 471		return;
 472
 473	/* IEEE80211_RADIOTAP_MCS
 474	 * IEEE80211_RADIOTAP_VHT */
 475	if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
 476		rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_MCS));
 477		pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 478			 IEEE80211_RADIOTAP_MCS_HAVE_GI |
 479			 IEEE80211_RADIOTAP_MCS_HAVE_BW;
 480		if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 481			pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
 482		if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 483			pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
 484		if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
 485			pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
 486		pos[2] = info->status.rates[0].idx;
 487		pos += 3;
 488	} else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
 489		u16 known = local->hw.radiotap_vht_details &
 490			(IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 491			 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
 492
 493		rthdr->it_present |= cpu_to_le32(BIT(IEEE80211_RADIOTAP_VHT));
 494
 495		/* required alignment from rthdr */
 496		pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 497
 498		/* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
 499		put_unaligned_le16(known, pos);
 500		pos += 2;
 501
 502		/* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
 503		if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 504			*pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
 505		pos++;
 506
 507		/* u8 bandwidth */
 508		if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 509			*pos = 1;
 510		else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 511			*pos = 4;
 512		else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 513			*pos = 11;
 514		else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
 515			*pos = 0;
 516		pos++;
 517
 518		/* u8 mcs_nss[4] */
 519		*pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
 520			ieee80211_rate_get_vht_nss(&info->status.rates[0]);
 521		pos += 4;
 522
 523		/* u8 coding */
 524		pos++;
 525		/* u8 group_id */
 526		pos++;
 527		/* u16 partial_aid */
 528		pos += 2;
 529	}
 530}
 531
 532/*
 533 * Handles the tx for TDLS teardown frames.
 534 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
 535 */
 536static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
 537					struct ieee80211_sub_if_data *sdata,
 538					struct sk_buff *skb, u32 flags)
 539{
 540	struct sk_buff *teardown_skb;
 541	struct sk_buff *orig_teardown_skb;
 542	bool is_teardown = false;
 543
 544	/* Get the teardown data we need and free the lock */
 545	spin_lock(&sdata->u.mgd.teardown_lock);
 546	teardown_skb = sdata->u.mgd.teardown_skb;
 547	orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
 548	if ((skb == orig_teardown_skb) && teardown_skb) {
 549		sdata->u.mgd.teardown_skb = NULL;
 550		sdata->u.mgd.orig_teardown_skb = NULL;
 551		is_teardown = true;
 552	}
 553	spin_unlock(&sdata->u.mgd.teardown_lock);
 554
 555	if (is_teardown) {
 556		/* This mechanism relies on being able to get ACKs */
 557		WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
 558
 559		/* Check if peer has ACKed */
 560		if (flags & IEEE80211_TX_STAT_ACK) {
 561			dev_kfree_skb_any(teardown_skb);
 562		} else {
 563			tdls_dbg(sdata,
 564				 "TDLS Resending teardown through AP\n");
 565
 566			ieee80211_subif_start_xmit(teardown_skb, skb->dev);
 567		}
 568	}
 569}
 570
 571static struct ieee80211_sub_if_data *
 572ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
 573{
 574	struct ieee80211_sub_if_data *sdata;
 575	struct ieee80211_hdr *hdr = (void *)skb->data;
 576
 577	if (skb->dev) {
 578		list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 579			if (!sdata->dev)
 580				continue;
 581
 582			if (skb->dev == sdata->dev)
 583				return sdata;
 584		}
 585
 586		return NULL;
 587	}
 588
 589	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 590		switch (sdata->vif.type) {
 591		case NL80211_IFTYPE_P2P_DEVICE:
 592			break;
 593		case NL80211_IFTYPE_NAN:
 594			if (sdata->u.nan.started)
 595				break;
 596			fallthrough;
 597		default:
 598			continue;
 599		}
 600
 601		if (ether_addr_equal(sdata->vif.addr, hdr->addr2))
 602			return sdata;
 603	}
 604
 605	return NULL;
 606}
 607
 608static void ieee80211_report_ack_skb(struct ieee80211_local *local,
 609				     struct sk_buff *orig_skb,
 610				     bool acked, bool dropped,
 611				     ktime_t ack_hwtstamp)
 612{
 613	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(orig_skb);
 614	struct sk_buff *skb;
 615	unsigned long flags;
 616
 617	spin_lock_irqsave(&local->ack_status_lock, flags);
 618	skb = idr_remove(&local->ack_status_frames, info->status_data);
 619	spin_unlock_irqrestore(&local->ack_status_lock, flags);
 620
 621	if (!skb)
 622		return;
 623
 624	if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
 625		u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
 626		struct ieee80211_sub_if_data *sdata;
 627		struct ieee80211_hdr *hdr = (void *)skb->data;
 628		bool is_valid_ack_signal =
 629			!!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
 630		struct cfg80211_tx_status status = {
 631			.cookie = cookie,
 632			.buf = skb->data,
 633			.len = skb->len,
 634			.ack = acked,
 635		};
 636
 637		if (ieee80211_is_timing_measurement(orig_skb) ||
 638		    ieee80211_is_ftm(orig_skb)) {
 639			status.tx_tstamp =
 640				ktime_to_ns(skb_hwtstamps(orig_skb)->hwtstamp);
 641			status.ack_tstamp = ktime_to_ns(ack_hwtstamp);
 642		}
 643
 644		rcu_read_lock();
 645		sdata = ieee80211_sdata_from_skb(local, skb);
 646		if (sdata) {
 647			if (skb->protocol == sdata->control_port_protocol ||
 648			    skb->protocol == cpu_to_be16(ETH_P_PREAUTH))
 649				cfg80211_control_port_tx_status(&sdata->wdev,
 650								cookie,
 651								skb->data,
 652								skb->len,
 653								acked,
 654								GFP_ATOMIC);
 655			else if (ieee80211_is_any_nullfunc(hdr->frame_control))
 656				cfg80211_probe_status(sdata->dev, hdr->addr1,
 657						      cookie, acked,
 658						      info->status.ack_signal,
 659						      is_valid_ack_signal,
 660						      GFP_ATOMIC);
 661			else if (ieee80211_is_mgmt(hdr->frame_control))
 662				cfg80211_mgmt_tx_status_ext(&sdata->wdev,
 663							    &status,
 664							    GFP_ATOMIC);
 665			else
 666				pr_warn("Unknown status report in ack skb\n");
 667
 668		}
 669		rcu_read_unlock();
 670
 671		dev_kfree_skb_any(skb);
 672	} else if (dropped) {
 673		dev_kfree_skb_any(skb);
 674	} else {
 675		/* consumes skb */
 676		skb_complete_wifi_ack(skb, acked);
 677	}
 678}
 679
 680static void ieee80211_handle_smps_status(struct ieee80211_sub_if_data *sdata,
 681					 bool acked, u16 status_data)
 682{
 683	u16 sub_data = u16_get_bits(status_data, IEEE80211_STATUS_SUBDATA_MASK);
 684	enum ieee80211_smps_mode smps_mode = sub_data & 3;
 685	int link_id = (sub_data >> 2);
 686	struct ieee80211_link_data *link;
 687
 688	if (!sdata || !ieee80211_sdata_running(sdata))
 689		return;
 690
 691	if (!acked)
 692		return;
 693
 694	if (sdata->vif.type != NL80211_IFTYPE_STATION)
 695		return;
 696
 697	if (WARN(link_id >= ARRAY_SIZE(sdata->link),
 698		 "bad SMPS status link: %d\n", link_id))
 699		return;
 700
 701	link = rcu_dereference(sdata->link[link_id]);
 702	if (!link)
 703		return;
 704
 705	/*
 706	 * This update looks racy, but isn't, the only other place
 707	 * updating this variable is in managed mode before assoc,
 708	 * and we have to be associated to have a status from the
 709	 * action frame TX, since we cannot send it while we're not
 710	 * associated yet.
 711	 */
 712	link->smps_mode = smps_mode;
 713	wiphy_work_queue(sdata->local->hw.wiphy, &link->u.mgd.recalc_smps);
 714}
 715
 716static void
 717ieee80211_handle_teardown_ttlm_status(struct ieee80211_sub_if_data *sdata,
 718				      bool acked)
 719{
 720	if (!sdata || !ieee80211_sdata_running(sdata))
 721		return;
 722
 723	if (!acked)
 724		return;
 725
 726	if (sdata->vif.type != NL80211_IFTYPE_STATION)
 727		return;
 728
 729	wiphy_work_queue(sdata->local->hw.wiphy,
 730			 &sdata->u.mgd.teardown_ttlm_work);
 731}
 732
 733static void ieee80211_report_used_skb(struct ieee80211_local *local,
 734				      struct sk_buff *skb, bool dropped,
 735				      ktime_t ack_hwtstamp)
 736{
 737	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 738	u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
 739	struct ieee80211_hdr *hdr = (void *)skb->data;
 740	bool acked = info->flags & IEEE80211_TX_STAT_ACK;
 741
 742	if (dropped)
 743		acked = false;
 744
 745	if (tx_time_est) {
 746		struct sta_info *sta;
 747
 748		rcu_read_lock();
 749
 750		sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
 751		ieee80211_sta_update_pending_airtime(local, sta,
 752						     skb_get_queue_mapping(skb),
 753						     tx_time_est,
 754						     true);
 755		rcu_read_unlock();
 756	}
 757
 758	if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
 759		struct ieee80211_sub_if_data *sdata;
 760
 761		rcu_read_lock();
 762
 763		sdata = ieee80211_sdata_from_skb(local, skb);
 764
 765		if (!sdata) {
 766			skb->dev = NULL;
 767		} else if (!dropped) {
 768			/* Check to see if packet is a TDLS teardown packet */
 769			if (ieee80211_is_data(hdr->frame_control) &&
 770			    (ieee80211_get_tdls_action(skb) ==
 771			     WLAN_TDLS_TEARDOWN)) {
 772				ieee80211_tdls_td_tx_handle(local, sdata, skb,
 773							    info->flags);
 774			} else if (ieee80211_s1g_is_twt_setup(skb)) {
 775				if (!acked) {
 776					struct sk_buff *qskb;
 777
 778					qskb = skb_clone(skb, GFP_ATOMIC);
 779					if (qskb) {
 780						skb_queue_tail(&sdata->status_queue,
 781							       qskb);
 782						wiphy_work_queue(local->hw.wiphy,
 783								 &sdata->work);
 784					}
 785				}
 786			} else {
 787				ieee80211_mgd_conn_tx_status(sdata,
 788							     hdr->frame_control,
 789							     acked);
 790			}
 791		}
 792
 793		rcu_read_unlock();
 794	} else if (info->status_data_idr) {
 795		ieee80211_report_ack_skb(local, skb, acked, dropped,
 796					 ack_hwtstamp);
 797	} else if (info->status_data) {
 798		struct ieee80211_sub_if_data *sdata;
 799
 800		rcu_read_lock();
 801
 802		sdata = ieee80211_sdata_from_skb(local, skb);
 803
 804		switch (u16_get_bits(info->status_data,
 805				     IEEE80211_STATUS_TYPE_MASK)) {
 806		case IEEE80211_STATUS_TYPE_SMPS:
 807			ieee80211_handle_smps_status(sdata, acked,
 808						     info->status_data);
 809			break;
 810		case IEEE80211_STATUS_TYPE_NEG_TTLM:
 811			ieee80211_handle_teardown_ttlm_status(sdata, acked);
 812			break;
 813		}
 814		rcu_read_unlock();
 815	}
 816
 817	if (!dropped && skb->destructor) {
 818		skb->wifi_acked_valid = 1;
 819		skb->wifi_acked = acked;
 820	}
 821
 822	ieee80211_led_tx(local);
 823
 824	if (skb_has_frag_list(skb)) {
 825		kfree_skb_list(skb_shinfo(skb)->frag_list);
 826		skb_shinfo(skb)->frag_list = NULL;
 827	}
 828}
 829
 830/*
 831 * Use a static threshold for now, best value to be determined
 832 * by testing ...
 833 * Should it depend on:
 834 *  - on # of retransmissions
 835 *  - current throughput (higher value for higher tpt)?
 836 */
 837#define STA_LOST_PKT_THRESHOLD	50
 838#define STA_LOST_PKT_TIME	HZ		/* 1 sec since last ACK */
 839#define STA_LOST_TDLS_PKT_TIME		(10*HZ) /* 10secs since last ACK */
 840
 841static void ieee80211_lost_packet(struct sta_info *sta,
 842				  struct ieee80211_tx_info *info)
 843{
 844	unsigned long pkt_time = STA_LOST_PKT_TIME;
 845	unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
 846
 847	/* If driver relies on its own algorithm for station kickout, skip
 848	 * mac80211 packet loss mechanism.
 849	 */
 850	if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
 851		return;
 852
 853	/* This packet was aggregated but doesn't carry status info */
 854	if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 855	    !(info->flags & IEEE80211_TX_STAT_AMPDU))
 856		return;
 857
 858	sta->deflink.status_stats.lost_packets++;
 859	if (sta->sta.tdls) {
 860		pkt_time = STA_LOST_TDLS_PKT_TIME;
 861		pkt_thr = STA_LOST_PKT_THRESHOLD;
 862	}
 863
 864	/*
 865	 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD
 866	 * of the last packets were lost, and that no ACK was received in the
 867	 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
 868	 * mechanism.
 869	 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
 870	 */
 871	if (sta->deflink.status_stats.lost_packets < pkt_thr ||
 872	    !time_after(jiffies, sta->deflink.status_stats.last_pkt_time + pkt_time))
 873		return;
 874
 875	cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
 876				    sta->deflink.status_stats.lost_packets,
 877				    GFP_ATOMIC);
 878	sta->deflink.status_stats.lost_packets = 0;
 879}
 880
 881static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
 882				  struct ieee80211_tx_info *info,
 883				  int *retry_count)
 884{
 885	int count = -1;
 886	int i;
 887
 888	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 889		if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 890		    !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
 891			/* just the first aggr frame carry status info */
 892			info->status.rates[i].idx = -1;
 893			info->status.rates[i].count = 0;
 894			break;
 895		} else if (info->status.rates[i].idx < 0) {
 896			break;
 897		} else if (i >= hw->max_report_rates) {
 898			/* the HW cannot have attempted that rate */
 899			info->status.rates[i].idx = -1;
 900			info->status.rates[i].count = 0;
 901			break;
 902		}
 903
 904		count += info->status.rates[i].count;
 905	}
 906
 907	if (count < 0)
 908		count = 0;
 909
 910	*retry_count = count;
 911	return i - 1;
 912}
 913
 914void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
 915			  int retry_count, struct ieee80211_tx_status *status)
 916{
 917	struct sk_buff *skb2;
 918	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 919	struct ieee80211_sub_if_data *sdata;
 920	struct net_device *prev_dev = NULL;
 921	int rtap_len;
 922
 923	/* send frame to monitor interfaces now */
 924	rtap_len = ieee80211_tx_radiotap_len(info, status);
 925	if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
 926		pr_err("ieee80211_tx_status: headroom too small\n");
 927		dev_kfree_skb(skb);
 928		return;
 929	}
 930	ieee80211_add_tx_radiotap_header(local, skb, retry_count,
 931					 rtap_len, status);
 932
 933	/* XXX: is this sufficient for BPF? */
 934	skb_reset_mac_header(skb);
 935	skb->ip_summed = CHECKSUM_UNNECESSARY;
 936	skb->pkt_type = PACKET_OTHERHOST;
 937	skb->protocol = htons(ETH_P_802_2);
 938	memset(skb->cb, 0, sizeof(skb->cb));
 939
 940	rcu_read_lock();
 941	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 942		if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
 943			if (!ieee80211_sdata_running(sdata))
 944				continue;
 945
 946			if (sdata->u.mntr.flags & MONITOR_FLAG_SKIP_TX)
 947				continue;
 948
 949			if (prev_dev) {
 950				skb2 = skb_clone(skb, GFP_ATOMIC);
 951				if (skb2) {
 952					skb2->dev = prev_dev;
 953					netif_rx(skb2);
 954				}
 955			}
 956
 957			prev_dev = sdata->dev;
 958		}
 959	}
 960	if (prev_dev) {
 961		skb->dev = prev_dev;
 962		netif_rx(skb);
 963		skb = NULL;
 964	}
 965	rcu_read_unlock();
 966	dev_kfree_skb(skb);
 967}
 968
 969static void __ieee80211_tx_status(struct ieee80211_hw *hw,
 970				  struct ieee80211_tx_status *status,
 971				  int rates_idx, int retry_count)
 972{
 973	struct sk_buff *skb = status->skb;
 974	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 975	struct ieee80211_local *local = hw_to_local(hw);
 976	struct ieee80211_tx_info *info = status->info;
 977	struct sta_info *sta;
 978	__le16 fc;
 979	bool acked;
 980	bool noack_success;
 981	struct ieee80211_bar *bar;
 982	int tid = IEEE80211_NUM_TIDS;
 983
 984	fc = hdr->frame_control;
 985
 986	if (status->sta) {
 987		sta = container_of(status->sta, struct sta_info, sta);
 988
 989		if (info->flags & IEEE80211_TX_STATUS_EOSP)
 990			clear_sta_flag(sta, WLAN_STA_SP);
 991
 992		acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
 993		noack_success = !!(info->flags &
 994				   IEEE80211_TX_STAT_NOACK_TRANSMITTED);
 995
 996		/* mesh Peer Service Period support */
 997		if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
 998		    ieee80211_is_data_qos(fc))
 999			ieee80211_mpsp_trigger_process(
1000				ieee80211_get_qos_ctl(hdr), sta, true, acked);
1001
1002		if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
1003		    (ieee80211_is_data(hdr->frame_control)) &&
1004		    (rates_idx != -1))
1005			sta->deflink.tx_stats.last_rate =
1006				info->status.rates[rates_idx];
1007
1008		if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1009		    (ieee80211_is_data_qos(fc))) {
1010			u16 ssn;
1011			u8 *qc;
1012
1013			qc = ieee80211_get_qos_ctl(hdr);
1014			tid = qc[0] & 0xf;
1015			ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1016						& IEEE80211_SCTL_SEQ);
1017			ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
1018					   tid, ssn);
1019		} else if (ieee80211_is_data_qos(fc)) {
1020			u8 *qc = ieee80211_get_qos_ctl(hdr);
1021
1022			tid = qc[0] & 0xf;
1023		}
1024
1025		if (!acked && ieee80211_is_back_req(fc)) {
1026			u16 control;
1027
1028			/*
1029			 * BAR failed, store the last SSN and retry sending
1030			 * the BAR when the next unicast transmission on the
1031			 * same TID succeeds.
1032			 */
1033			bar = (struct ieee80211_bar *) skb->data;
1034			control = le16_to_cpu(bar->control);
1035			if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
1036				u16 ssn = le16_to_cpu(bar->start_seq_num);
1037
1038				tid = (control &
1039				       IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
1040				      IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
1041
1042				ieee80211_set_bar_pending(sta, tid, ssn);
1043			}
1044		}
1045
1046		if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1047			ieee80211_handle_filtered_frame(local, sta, skb);
1048			return;
1049		} else if (ieee80211_is_data_present(fc)) {
1050			if (!acked && !noack_success)
1051				sta->deflink.status_stats.msdu_failed[tid]++;
1052
1053			sta->deflink.status_stats.msdu_retries[tid] +=
1054				retry_count;
1055		}
1056
1057		if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
1058			ieee80211_frame_acked(sta, skb);
1059
1060	}
1061
1062	/* SNMP counters
1063	 * Fragments are passed to low-level drivers as separate skbs, so these
1064	 * are actually fragments, not frames. Update frame counters only for
1065	 * the first fragment of the frame. */
1066	if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1067	    (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1068		if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1069			I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1070			if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1071				I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1072			if (retry_count > 0)
1073				I802_DEBUG_INC(local->dot11RetryCount);
1074			if (retry_count > 1)
1075				I802_DEBUG_INC(local->dot11MultipleRetryCount);
1076		}
1077
1078		/* This counter shall be incremented for an acknowledged MPDU
1079		 * with an individual address in the address 1 field or an MPDU
1080		 * with a multicast address in the address 1 field of type Data
1081		 * or Management. */
1082		if (!is_multicast_ether_addr(hdr->addr1) ||
1083		    ieee80211_is_data(fc) ||
1084		    ieee80211_is_mgmt(fc))
1085			I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1086	} else {
1087		if (ieee80211_is_first_frag(hdr->seq_ctrl))
1088			I802_DEBUG_INC(local->dot11FailedCount);
1089	}
1090
1091	if (ieee80211_is_any_nullfunc(fc) &&
1092	    ieee80211_has_pm(fc) &&
1093	    ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1094	    !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1095	    local->ps_sdata && !(local->scanning)) {
1096		if (info->flags & IEEE80211_TX_STAT_ACK)
1097			local->ps_sdata->u.mgd.flags |=
1098					IEEE80211_STA_NULLFUNC_ACKED;
1099		mod_timer(&local->dynamic_ps_timer,
1100			  jiffies + msecs_to_jiffies(10));
1101	}
1102
1103	ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp);
1104
1105	/*
1106	 * This is a bit racy but we can avoid a lot of work
1107	 * with this test...
1108	 */
1109	if (local->tx_mntrs)
1110		ieee80211_tx_monitor(local, skb, retry_count, status);
1111	else if (status->free_list)
1112		list_add_tail(&skb->list, status->free_list);
1113	else
1114		dev_kfree_skb(skb);
1115}
1116
1117void ieee80211_tx_status_skb(struct ieee80211_hw *hw, struct sk_buff *skb)
1118{
1119	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1120	struct ieee80211_local *local = hw_to_local(hw);
1121	struct ieee80211_tx_status status = {
1122		.skb = skb,
1123		.info = IEEE80211_SKB_CB(skb),
1124	};
1125	struct sta_info *sta;
1126
1127	rcu_read_lock();
1128
1129	sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
1130	if (sta)
1131		status.sta = &sta->sta;
1132
1133	ieee80211_tx_status_ext(hw, &status);
1134	rcu_read_unlock();
1135}
1136EXPORT_SYMBOL(ieee80211_tx_status_skb);
1137
1138void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1139			     struct ieee80211_tx_status *status)
1140{
1141	struct ieee80211_local *local = hw_to_local(hw);
1142	struct ieee80211_tx_info *info = status->info;
1143	struct ieee80211_sta *pubsta = status->sta;
1144	struct sk_buff *skb = status->skb;
1145	struct sta_info *sta = NULL;
1146	int rates_idx, retry_count;
1147	bool acked, noack_success, ack_signal_valid;
1148	u16 tx_time_est;
1149
1150	if (pubsta) {
1151		sta = container_of(pubsta, struct sta_info, sta);
1152
1153		if (status->n_rates)
1154			sta->deflink.tx_stats.last_rate_info =
1155				status->rates[status->n_rates - 1].rate_idx;
1156	}
1157
1158	if (skb && (tx_time_est =
1159		    ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) {
1160		/* Do this here to avoid the expensive lookup of the sta
1161		 * in ieee80211_report_used_skb().
1162		 */
1163		ieee80211_sta_update_pending_airtime(local, sta,
1164						     skb_get_queue_mapping(skb),
1165						     tx_time_est,
1166						     true);
1167		ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0);
1168	}
1169
1170	if (!status->info)
1171		goto free;
1172
1173	rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
1174
1175	acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1176	noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1177	ack_signal_valid =
1178		!!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
1179
1180	if (pubsta) {
1181		struct ieee80211_sub_if_data *sdata = sta->sdata;
1182
1183		if (!acked && !noack_success)
1184			sta->deflink.status_stats.retry_failed++;
1185		sta->deflink.status_stats.retry_count += retry_count;
1186
1187		if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1188			if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1189			    skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1190				ieee80211_sta_tx_notify(sdata, (void *) skb->data,
1191							acked, info->status.tx_time);
1192
1193			if (acked) {
1194				sta->deflink.status_stats.last_ack = jiffies;
1195
1196				if (sta->deflink.status_stats.lost_packets)
1197					sta->deflink.status_stats.lost_packets = 0;
1198
1199				/* Track when last packet was ACKed */
1200				sta->deflink.status_stats.last_pkt_time = jiffies;
1201
1202				/* Reset connection monitor */
1203				if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1204				    unlikely(sdata->u.mgd.probe_send_count > 0))
1205					sdata->u.mgd.probe_send_count = 0;
1206
1207				if (ack_signal_valid) {
1208					sta->deflink.status_stats.last_ack_signal =
1209							 (s8)info->status.ack_signal;
1210					sta->deflink.status_stats.ack_signal_filled = true;
1211					ewma_avg_signal_add(&sta->deflink.status_stats.avg_ack_signal,
1212							    -info->status.ack_signal);
1213				}
1214			} else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1215				/*
1216				 * The STA is in power save mode, so assume
1217				 * that this TX packet failed because of that.
1218				 */
1219				if (skb)
1220					ieee80211_handle_filtered_frame(local, sta, skb);
1221				return;
1222			} else if (noack_success) {
1223				/* nothing to do here, do not account as lost */
1224			} else {
1225				ieee80211_lost_packet(sta, info);
1226			}
1227		}
1228
1229		rate_control_tx_status(local, status);
1230		if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1231			ieee80211s_update_metric(local, sta, status);
1232	}
1233
1234	if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1235		return __ieee80211_tx_status(hw, status, rates_idx,
1236					     retry_count);
1237
1238	if (acked || noack_success) {
1239		I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1240		if (!pubsta)
1241			I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1242		if (retry_count > 0)
1243			I802_DEBUG_INC(local->dot11RetryCount);
1244		if (retry_count > 1)
1245			I802_DEBUG_INC(local->dot11MultipleRetryCount);
1246	} else {
1247		I802_DEBUG_INC(local->dot11FailedCount);
1248	}
1249
1250free:
1251	if (!skb)
1252		return;
1253
1254	ieee80211_report_used_skb(local, skb, false, status->ack_hwtstamp);
1255	if (status->free_list)
1256		list_add_tail(&skb->list, status->free_list);
1257	else
1258		dev_kfree_skb(skb);
1259}
1260EXPORT_SYMBOL(ieee80211_tx_status_ext);
1261
1262void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1263			      struct ieee80211_sta *pubsta,
1264			      struct ieee80211_tx_info *info)
1265{
1266	struct ieee80211_local *local = hw_to_local(hw);
1267	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1268	struct ieee80211_tx_status status = {
1269		.info = info,
1270		.sta = pubsta,
1271	};
1272
1273	rate_control_tx_status(local, &status);
1274
1275	if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1276		sta->deflink.tx_stats.last_rate = info->status.rates[0];
1277}
1278EXPORT_SYMBOL(ieee80211_tx_rate_update);
1279
1280void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1281{
1282	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1283	cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1284				    num_packets, GFP_ATOMIC);
1285}
1286EXPORT_SYMBOL(ieee80211_report_low_ack);
1287
1288void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1289{
1290	struct ieee80211_local *local = hw_to_local(hw);
1291	ktime_t kt = ktime_set(0, 0);
1292
1293	ieee80211_report_used_skb(local, skb, true, kt);
1294	dev_kfree_skb_any(skb);
1295}
1296EXPORT_SYMBOL(ieee80211_free_txskb);
1297
1298void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1299			      struct sk_buff_head *skbs)
1300{
1301	struct sk_buff *skb;
1302
1303	while ((skb = __skb_dequeue(skbs)))
1304		ieee80211_free_txskb(hw, skb);
1305}
1306EXPORT_SYMBOL(ieee80211_purge_tx_queue);