net/mac80211/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  */
   9
  10 #include <linux/export.h>
  11 #include <linux/etherdevice.h>
  12 #include <net/mac80211.h>
  13 #include <asm/unaligned.h>
  14 #include "ieee80211_i.h"
  15 #include "rate.h"
  16 #include "mesh.h"
  17 #include "led.h"
  18 #include "wme.h"
  19
  20
  21 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
  22                                  struct sk_buff *skb)
  23 {
  24         struct ieee80211_local *local = hw_to_local(hw);
  25         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  26         int tmp;
  27
  28         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
  29         skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
  30                        &local->skb_queue : &local->skb_queue_unreliable, skb);
  31         tmp = skb_queue_len(&local->skb_queue) +
  32                 skb_queue_len(&local->skb_queue_unreliable);
  33         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
  34                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
  35                 ieee80211_free_txskb(hw, skb);
  36                 tmp--;
  37                 I802_DEBUG_INC(local->tx_status_drop);
  38         }
  39         tasklet_schedule(&local->tasklet);
  40 }
  41 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
  42
  43 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
  44                                             struct sta_info *sta,
  45                                             struct sk_buff *skb)
  46 {
  47         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  48         struct ieee80211_hdr *hdr = (void *)skb->data;
  49         int ac;
  50
  51         if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
  52                            IEEE80211_TX_CTL_AMPDU)) {
  53                 ieee80211_free_txskb(&local->hw, skb);
  54                 return;
  55         }
  56
  57         /*
  58          * This skb 'survived' a round-trip through the driver, and
  59          * hopefully the driver didn't mangle it too badly. However,
  60          * we can definitely not rely on the control information
  61          * being correct. Clear it so we don't get junk there, and
  62          * indicate that it needs new processing, but must not be
  63          * modified/encrypted again.
  64          */
  65         memset(&info->control, 0, sizeof(info->control));
  66
  67         info->control.jiffies = jiffies;
  68         info->control.vif = &sta->sdata->vif;
  69         info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
  70                        IEEE80211_TX_INTFL_RETRANSMISSION;
  71         info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
  72
  73         sta->status_stats.filtered++;
  74
  75         /*
  76          * Clear more-data bit on filtered frames, it might be set
  77          * but later frames might time out so it might have to be
  78          * clear again ... It's all rather unlikely (this frame
  79          * should time out first, right?) but let's not confuse
  80          * peers unnecessarily.
  81          */
  82         if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
  83                 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
  84
  85         if (ieee80211_is_data_qos(hdr->frame_control)) {
  86                 u8 *p = ieee80211_get_qos_ctl(hdr);
  87                 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
  88
  89                 /*
  90                  * Clear EOSP if set, this could happen e.g.
  91                  * if an absence period (us being a P2P GO)
  92                  * shortens the SP.
  93                  */
  94                 if (*p & IEEE80211_QOS_CTL_EOSP)
  95                         *p &= ~IEEE80211_QOS_CTL_EOSP;
  96                 ac = ieee80211_ac_from_tid(tid);
  97         } else {
  98                 ac = IEEE80211_AC_BE;
  99         }
 100
 101         /*
 102          * Clear the TX filter mask for this STA when sending the next
 103          * packet. If the STA went to power save mode, this will happen
 104          * when it wakes up for the next time.
 105          */
 106         set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
 107         ieee80211_clear_fast_xmit(sta);
 108
 109         /*
 110          * This code races in the following way:
 111          *
 112          *  (1) STA sends frame indicating it will go to sleep and does so
 113          *  (2) hardware/firmware adds STA to filter list, passes frame up
 114          *  (3) hardware/firmware processes TX fifo and suppresses a frame
 115          *  (4) we get TX status before having processed the frame and
 116          *      knowing that the STA has gone to sleep.
 117          *
 118          * This is actually quite unlikely even when both those events are
 119          * processed from interrupts coming in quickly after one another or
 120          * even at the same time because we queue both TX status events and
 121          * RX frames to be processed by a tasklet and process them in the
 122          * same order that they were received or TX status last. Hence, there
 123          * is no race as long as the frame RX is processed before the next TX
 124          * status, which drivers can ensure, see below.
 125          *
 126          * Note that this can only happen if the hardware or firmware can
 127          * actually add STAs to the filter list, if this is done by the
 128          * driver in response to set_tim() (which will only reduce the race
 129          * this whole filtering tries to solve, not completely solve it)
 130          * this situation cannot happen.
 131          *
 132          * To completely solve this race drivers need to make sure that they
 133          *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
 134          *      functions and
 135          *  (b) always process RX events before TX status events if ordering
 136          *      can be unknown, for example with different interrupt status
 137          *      bits.
 138          *  (c) if PS mode transitions are manual (i.e. the flag
 139          *      %IEEE80211_HW_AP_LINK_PS is set), always process PS state
 140          *      changes before calling TX status events if ordering can be
 141          *      unknown.
 142          */
 143         if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
 144             skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
 145                 skb_queue_tail(&sta->tx_filtered[ac], skb);
 146                 sta_info_recalc_tim(sta);
 147
 148                 if (!timer_pending(&local->sta_cleanup))
 149                         mod_timer(&local->sta_cleanup,
 150                                   round_jiffies(jiffies +
 151                                                 STA_INFO_CLEANUP_INTERVAL));
 152                 return;
 153         }
 154
 155         if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
 156             !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
 157                 /* Software retry the packet once */
 158                 info->flags |= IEEE80211_TX_INTFL_RETRIED;
 159                 ieee80211_add_pending_skb(local, skb);
 160                 return;
 161         }
 162
 163         ps_dbg_ratelimited(sta->sdata,
 164                            "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
 165                            skb_queue_len(&sta->tx_filtered[ac]),
 166                            !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
 167         ieee80211_free_txskb(&local->hw, skb);
 168 }
 169
 170 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
 171 {
 172         struct tid_ampdu_tx *tid_tx;
 173
 174         tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
 175         if (!tid_tx || !tid_tx->bar_pending)
 176                 return;
 177
 178         tid_tx->bar_pending = false;
 179         ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
 180 }
 181
 182 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
 183 {
 184         struct ieee80211_mgmt *mgmt = (void *) skb->data;
 185         struct ieee80211_local *local = sta->local;
 186         struct ieee80211_sub_if_data *sdata = sta->sdata;
 187         struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
 188
 189         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
 190                 sta->status_stats.last_ack = jiffies;
 191                 if (txinfo->status.is_valid_ack_signal) {
 192                         sta->status_stats.last_ack_signal =
 193                                          (s8)txinfo->status.ack_signal;
 194                         sta->status_stats.ack_signal_filled = true;
 195                         ewma_avg_signal_add(&sta->status_stats.avg_ack_signal,
 196                                             -txinfo->status.ack_signal);
 197                 }
 198         }
 199
 200         if (ieee80211_is_data_qos(mgmt->frame_control)) {
 201                 struct ieee80211_hdr *hdr = (void *) skb->data;
 202                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 203                 u16 tid = qc[0] & 0xf;
 204
 205                 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
 206         }
 207
 208         if (ieee80211_is_action(mgmt->frame_control) &&
 209             !ieee80211_has_protected(mgmt->frame_control) &&
 210             mgmt->u.action.category == WLAN_CATEGORY_HT &&
 211             mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
 212             ieee80211_sdata_running(sdata)) {
 213                 enum ieee80211_smps_mode smps_mode;
 214
 215                 switch (mgmt->u.action.u.ht_smps.smps_control) {
 216                 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
 217                         smps_mode = IEEE80211_SMPS_DYNAMIC;
 218                         break;
 219                 case WLAN_HT_SMPS_CONTROL_STATIC:
 220                         smps_mode = IEEE80211_SMPS_STATIC;
 221                         break;
 222                 case WLAN_HT_SMPS_CONTROL_DISABLED:
 223                 default: /* shouldn't happen since we don't send that */
 224                         smps_mode = IEEE80211_SMPS_OFF;
 225                         break;
 226                 }
 227
 228                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 229                         /*
 230                          * This update looks racy, but isn't -- if we come
 231                          * here we've definitely got a station that we're
 232                          * talking to, and on a managed interface that can
 233                          * only be the AP. And the only other place updating
 234                          * this variable in managed mode is before association.
 235                          */
 236                         sdata->smps_mode = smps_mode;
 237                         ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
 238                 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
 239                            sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
 240                         sta->known_smps_mode = smps_mode;
 241                 }
 242         }
 243 }
 244
 245 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
 246 {
 247         struct tid_ampdu_tx *tid_tx;
 248
 249         tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
 250         if (!tid_tx)
 251                 return;
 252
 253         tid_tx->failed_bar_ssn = ssn;
 254         tid_tx->bar_pending = true;
 255 }
 256
 257 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
 258                                      struct ieee80211_tx_status *status)
 259 {
 260         int len = sizeof(struct ieee80211_radiotap_header);
 261
 262         /* IEEE80211_RADIOTAP_RATE rate */
 263         if (info->status.rates[0].idx >= 0 &&
 264             !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
 265                                              IEEE80211_TX_RC_VHT_MCS)))
 266                 len += 2;
 267
 268         /* IEEE80211_RADIOTAP_TX_FLAGS */
 269         len += 2;
 270
 271         /* IEEE80211_RADIOTAP_DATA_RETRIES */
 272         len += 1;
 273
 274         /* IEEE80211_RADIOTAP_MCS
 275          * IEEE80211_RADIOTAP_VHT */
 276         if (status && status->rate) {
 277                 if (status->rate->flags & RATE_INFO_FLAGS_MCS)
 278                         len += 3;
 279                 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)
 280                         len = ALIGN(len, 2) + 12;
 281                 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)
 282                         len = ALIGN(len, 2) + 12;
 283         } else if (info->status.rates[0].idx >= 0) {
 284                 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
 285                         len += 3;
 286                 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
 287                         len = ALIGN(len, 2) + 12;
 288         }
 289
 290         return len;
 291 }
 292
 293 static void
 294 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
 295                                  struct ieee80211_supported_band *sband,
 296                                  struct sk_buff *skb, int retry_count,
 297                                  int rtap_len, int shift,
 298                                  struct ieee80211_tx_status *status)
 299 {
 300         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 301         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 302         struct ieee80211_radiotap_header *rthdr;
 303         unsigned char *pos;
 304         u16 legacy_rate = 0;
 305         u16 txflags;
 306
 307         rthdr = skb_push(skb, rtap_len);
 308
 309         memset(rthdr, 0, rtap_len);
 310         rthdr->it_len = cpu_to_le16(rtap_len);
 311         rthdr->it_present =
 312                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 313                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 314         pos = (unsigned char *)(rthdr + 1);
 315
 316         /*
 317          * XXX: Once radiotap gets the bitmap reset thing the vendor
 318          *      extensions proposal contains, we can actually report
 319          *      the whole set of tries we did.
 320          */
 321
 322         /* IEEE80211_RADIOTAP_RATE */
 323
 324         if (status && status->rate && !(status->rate->flags &
 325                                         (RATE_INFO_FLAGS_MCS |
 326                                          RATE_INFO_FLAGS_60G |
 327                                          RATE_INFO_FLAGS_VHT_MCS |
 328                                          RATE_INFO_FLAGS_HE_MCS)))
 329                 legacy_rate = status->rate->legacy;
 330         else if (info->status.rates[0].idx >= 0 &&
 331                  !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
 332                                                   IEEE80211_TX_RC_VHT_MCS)))
 333                 legacy_rate =
 334                         sband->bitrates[info->status.rates[0].idx].bitrate;
 335
 336         if (legacy_rate) {
 337                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
 338                 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
 339                 /* padding for tx flags */
 340                 pos += 2;
 341         }
 342
 343         /* IEEE80211_RADIOTAP_TX_FLAGS */
 344         txflags = 0;
 345         if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
 346             !is_multicast_ether_addr(hdr->addr1))
 347                 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
 348
 349         if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
 350                 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
 351         if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
 352                 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
 353
 354         put_unaligned_le16(txflags, pos);
 355         pos += 2;
 356
 357         /* IEEE80211_RADIOTAP_DATA_RETRIES */
 358         /* for now report the total retry_count */
 359         *pos = retry_count;
 360         pos++;
 361
 362         if (status && status->rate &&
 363             (status->rate->flags & RATE_INFO_FLAGS_MCS)) {
 364                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
 365                 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 366                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 367                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 368                 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
 369                         pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
 370                 if (status->rate->bw == RATE_INFO_BW_40)
 371                         pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
 372                 pos[2] = status->rate->mcs;
 373                 pos += 3;
 374         } else if (status && status->rate &&
 375                    (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
 376                 u16 known = local->hw.radiotap_vht_details &
 377                         (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 378                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
 379
 380                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
 381
 382                 /* required alignment from rthdr */
 383                 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 384
 385                 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
 386                 put_unaligned_le16(known, pos);
 387                 pos += 2;
 388
 389                 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
 390                 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
 391                         *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
 392                 pos++;
 393
 394                 /* u8 bandwidth */
 395                 switch (status->rate->bw) {
 396                 case RATE_INFO_BW_160:
 397                         *pos = 11;
 398                         break;
 399                 case RATE_INFO_BW_80:
 400                         *pos = 2;
 401                         break;
 402                 case RATE_INFO_BW_40:
 403                         *pos = 1;
 404                         break;
 405                 default:
 406                         *pos = 0;
 407                         break;
 408                 }
 409
 410                 /* u8 mcs_nss[4] */
 411                 *pos = (status->rate->mcs << 4) | status->rate->nss;
 412                 pos += 4;
 413
 414                 /* u8 coding */
 415                 pos++;
 416                 /* u8 group_id */
 417                 pos++;
 418                 /* u16 partial_aid */
 419                 pos += 2;
 420         } else if (status && status->rate &&
 421                    (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) {
 422                 struct ieee80211_radiotap_he *he;
 423
 424                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
 425
 426                 /* required alignment from rthdr */
 427                 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 428                 he = (struct ieee80211_radiotap_he *)pos;
 429
 430                 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
 431                                         IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
 432                                         IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
 433                                         IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
 434
 435                 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
 436
 437 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
 438
 439                 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss);
 440
 441 #define CHECK_GI(s) \
 442         BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
 443         (int)NL80211_RATE_INFO_HE_GI_##s)
 444
 445                 CHECK_GI(0_8);
 446                 CHECK_GI(1_6);
 447                 CHECK_GI(3_2);
 448
 449                 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs);
 450                 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm);
 451
 452                 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi);
 453
 454                 switch (status->rate->bw) {
 455                 case RATE_INFO_BW_20:
 456                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 457                                              IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
 458                         break;
 459                 case RATE_INFO_BW_40:
 460                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 461                                              IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
 462                         break;
 463                 case RATE_INFO_BW_80:
 464                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 465                                              IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
 466                         break;
 467                 case RATE_INFO_BW_160:
 468                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 469                                              IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
 470                         break;
 471                 case RATE_INFO_BW_HE_RU:
 472 #define CHECK_RU_ALLOC(s) \
 473         BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
 474         NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
 475
 476                         CHECK_RU_ALLOC(26);
 477                         CHECK_RU_ALLOC(52);
 478                         CHECK_RU_ALLOC(106);
 479                         CHECK_RU_ALLOC(242);
 480                         CHECK_RU_ALLOC(484);
 481                         CHECK_RU_ALLOC(996);
 482                         CHECK_RU_ALLOC(2x996);
 483
 484                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 485                                              status->rate->he_ru_alloc + 4);
 486                         break;
 487                 default:
 488                         WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw);
 489                 }
 490
 491                 pos += sizeof(struct ieee80211_radiotap_he);
 492         }
 493
 494         if ((status && status->rate) || info->status.rates[0].idx < 0)
 495                 return;
 496
 497         /* IEEE80211_RADIOTAP_MCS
 498          * IEEE80211_RADIOTAP_VHT */
 499         if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
 500                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
 501                 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 502                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 503                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 504                 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 505                         pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
 506                 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 507                         pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
 508                 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
 509                         pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
 510                 pos[2] = info->status.rates[0].idx;
 511                 pos += 3;
 512         } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
 513                 u16 known = local->hw.radiotap_vht_details &
 514                         (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 515                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
 516
 517                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
 518
 519                 /* required alignment from rthdr */
 520                 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 521
 522                 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
 523                 put_unaligned_le16(known, pos);
 524                 pos += 2;
 525
 526                 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
 527                 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 528                         *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
 529                 pos++;
 530
 531                 /* u8 bandwidth */
 532                 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 533                         *pos = 1;
 534                 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 535                         *pos = 4;
 536                 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 537                         *pos = 11;
 538                 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
 539                         *pos = 0;
 540                 pos++;
 541
 542                 /* u8 mcs_nss[4] */
 543                 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
 544                         ieee80211_rate_get_vht_nss(&info->status.rates[0]);
 545                 pos += 4;
 546
 547                 /* u8 coding */
 548                 pos++;
 549                 /* u8 group_id */
 550                 pos++;
 551                 /* u16 partial_aid */
 552                 pos += 2;
 553         }
 554 }
 555
 556 /*
 557  * Handles the tx for TDLS teardown frames.
 558  * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
 559  */
 560 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
 561                                         struct ieee80211_sub_if_data *sdata,
 562                                         struct sk_buff *skb, u32 flags)
 563 {
 564         struct sk_buff *teardown_skb;
 565         struct sk_buff *orig_teardown_skb;
 566         bool is_teardown = false;
 567
 568         /* Get the teardown data we need and free the lock */
 569         spin_lock(&sdata->u.mgd.teardown_lock);
 570         teardown_skb = sdata->u.mgd.teardown_skb;
 571         orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
 572         if ((skb == orig_teardown_skb) && teardown_skb) {
 573                 sdata->u.mgd.teardown_skb = NULL;
 574                 sdata->u.mgd.orig_teardown_skb = NULL;
 575                 is_teardown = true;
 576         }
 577         spin_unlock(&sdata->u.mgd.teardown_lock);
 578
 579         if (is_teardown) {
 580                 /* This mechanism relies on being able to get ACKs */
 581                 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
 582
 583                 /* Check if peer has ACKed */
 584                 if (flags & IEEE80211_TX_STAT_ACK) {
 585                         dev_kfree_skb_any(teardown_skb);
 586                 } else {
 587                         tdls_dbg(sdata,
 588                                  "TDLS Resending teardown through AP\n");
 589
 590                         ieee80211_subif_start_xmit(teardown_skb, skb->dev);
 591                 }
 592         }
 593 }
 594
 595 static struct ieee80211_sub_if_data *
 596 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
 597 {
 598         struct ieee80211_sub_if_data *sdata;
 599
 600         if (skb->dev) {
 601                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 602                         if (!sdata->dev)
 603                                 continue;
 604
 605                         if (skb->dev == sdata->dev)
 606                                 return sdata;
 607                 }
 608
 609                 return NULL;
 610         }
 611
 612         return rcu_dereference(local->p2p_sdata);
 613 }
 614
 615 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
 616                                      struct ieee80211_tx_info *info,
 617                                      bool acked, bool dropped)
 618 {
 619         struct sk_buff *skb;
 620         unsigned long flags;
 621
 622         spin_lock_irqsave(&local->ack_status_lock, flags);
 623         skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
 624         spin_unlock_irqrestore(&local->ack_status_lock, flags);
 625
 626         if (!skb)
 627                 return;
 628
 629         if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
 630                 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
 631                 struct ieee80211_sub_if_data *sdata;
 632                 struct ieee80211_hdr *hdr = (void *)skb->data;
 633
 634                 rcu_read_lock();
 635                 sdata = ieee80211_sdata_from_skb(local, skb);
 636                 if (sdata) {
 637                         if (ieee80211_is_nullfunc(hdr->frame_control) ||
 638                             ieee80211_is_qos_nullfunc(hdr->frame_control))
 639                                 cfg80211_probe_status(sdata->dev, hdr->addr1,
 640                                                       cookie, acked,
 641                                                       info->status.ack_signal,
 642                                                       info->status.is_valid_ack_signal,
 643                                                       GFP_ATOMIC);
 644                         else
 645                                 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
 646                                                         skb->data, skb->len,
 647                                                         acked, GFP_ATOMIC);
 648                 }
 649                 rcu_read_unlock();
 650
 651                 dev_kfree_skb_any(skb);
 652         } else if (dropped) {
 653                 dev_kfree_skb_any(skb);
 654         } else {
 655                 /* consumes skb */
 656                 skb_complete_wifi_ack(skb, acked);
 657         }
 658 }
 659
 660 static void ieee80211_report_used_skb(struct ieee80211_local *local,
 661                                       struct sk_buff *skb, bool dropped)
 662 {
 663         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 664         struct ieee80211_hdr *hdr = (void *)skb->data;
 665         bool acked = info->flags & IEEE80211_TX_STAT_ACK;
 666
 667         if (dropped)
 668                 acked = false;
 669
 670         if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
 671                 struct ieee80211_sub_if_data *sdata;
 672
 673                 rcu_read_lock();
 674
 675                 sdata = ieee80211_sdata_from_skb(local, skb);
 676
 677                 if (!sdata) {
 678                         skb->dev = NULL;
 679                 } else {
 680                         unsigned int hdr_size =
 681                                 ieee80211_hdrlen(hdr->frame_control);
 682
 683                         /* Check to see if packet is a TDLS teardown packet */
 684                         if (ieee80211_is_data(hdr->frame_control) &&
 685                             (ieee80211_get_tdls_action(skb, hdr_size) ==
 686                              WLAN_TDLS_TEARDOWN))
 687                                 ieee80211_tdls_td_tx_handle(local, sdata, skb,
 688                                                             info->flags);
 689                         else
 690                                 ieee80211_mgd_conn_tx_status(sdata,
 691                                                              hdr->frame_control,
 692                                                              acked);
 693                 }
 694
 695                 rcu_read_unlock();
 696         } else if (info->ack_frame_id) {
 697                 ieee80211_report_ack_skb(local, info, acked, dropped);
 698         }
 699
 700         if (!dropped && skb->destructor) {
 701                 skb->wifi_acked_valid = 1;
 702                 skb->wifi_acked = acked;
 703         }
 704
 705         ieee80211_led_tx(local);
 706
 707         if (skb_has_frag_list(skb)) {
 708                 kfree_skb_list(skb_shinfo(skb)->frag_list);
 709                 skb_shinfo(skb)->frag_list = NULL;
 710         }
 711 }
 712
 713 /*
 714  * Use a static threshold for now, best value to be determined
 715  * by testing ...
 716  * Should it depend on:
 717  *  - on # of retransmissions
 718  *  - current throughput (higher value for higher tpt)?
 719  */
 720 #define STA_LOST_PKT_THRESHOLD  50
 721 #define STA_LOST_TDLS_PKT_THRESHOLD     10
 722 #define STA_LOST_TDLS_PKT_TIME          (10*HZ) /* 10secs since last ACK */
 723
 724 static void ieee80211_lost_packet(struct sta_info *sta,
 725                                   struct ieee80211_tx_info *info)
 726 {
 727         /* If driver relies on its own algorithm for station kickout, skip
 728          * mac80211 packet loss mechanism.
 729          */
 730         if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
 731                 return;
 732
 733         /* This packet was aggregated but doesn't carry status info */
 734         if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 735             !(info->flags & IEEE80211_TX_STAT_AMPDU))
 736                 return;
 737
 738         sta->status_stats.lost_packets++;
 739         if (!sta->sta.tdls &&
 740             sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
 741                 return;
 742
 743         /*
 744          * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
 745          * of the last packets were lost, and that no ACK was received in the
 746          * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
 747          * mechanism.
 748          */
 749         if (sta->sta.tdls &&
 750             (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
 751              time_before(jiffies,
 752                          sta->status_stats.last_tdls_pkt_time +
 753                          STA_LOST_TDLS_PKT_TIME)))
 754                 return;
 755
 756         cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
 757                                     sta->status_stats.lost_packets, GFP_ATOMIC);
 758         sta->status_stats.lost_packets = 0;
 759 }
 760
 761 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
 762                                   struct ieee80211_tx_info *info,
 763                                   int *retry_count)
 764 {
 765         int rates_idx = -1;
 766         int count = -1;
 767         int i;
 768
 769         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 770                 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 771                     !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
 772                         /* just the first aggr frame carry status info */
 773                         info->status.rates[i].idx = -1;
 774                         info->status.rates[i].count = 0;
 775                         break;
 776                 } else if (info->status.rates[i].idx < 0) {
 777                         break;
 778                 } else if (i >= hw->max_report_rates) {
 779                         /* the HW cannot have attempted that rate */
 780                         info->status.rates[i].idx = -1;
 781                         info->status.rates[i].count = 0;
 782                         break;
 783                 }
 784
 785                 count += info->status.rates[i].count;
 786         }
 787         rates_idx = i - 1;
 788
 789         if (count < 0)
 790                 count = 0;
 791
 792         *retry_count = count;
 793         return rates_idx;
 794 }
 795
 796 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
 797                           struct ieee80211_supported_band *sband,
 798                           int retry_count, int shift, bool send_to_cooked,
 799                           struct ieee80211_tx_status *status)
 800 {
 801         struct sk_buff *skb2;
 802         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 803         struct ieee80211_sub_if_data *sdata;
 804         struct net_device *prev_dev = NULL;
 805         int rtap_len;
 806
 807         /* send frame to monitor interfaces now */
 808         rtap_len = ieee80211_tx_radiotap_len(info, status);
 809         if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
 810                 pr_err("ieee80211_tx_status: headroom too small\n");
 811                 dev_kfree_skb(skb);
 812                 return;
 813         }
 814         ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
 815                                          rtap_len, shift, status);
 816
 817         /* XXX: is this sufficient for BPF? */
 818         skb_reset_mac_header(skb);
 819         skb->ip_summed = CHECKSUM_UNNECESSARY;
 820         skb->pkt_type = PACKET_OTHERHOST;
 821         skb->protocol = htons(ETH_P_802_2);
 822         memset(skb->cb, 0, sizeof(skb->cb));
 823
 824         rcu_read_lock();
 825         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 826                 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
 827                         if (!ieee80211_sdata_running(sdata))
 828                                 continue;
 829
 830                         if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
 831                             !send_to_cooked)
 832                                 continue;
 833
 834                         if (prev_dev) {
 835                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 836                                 if (skb2) {
 837                                         skb2->dev = prev_dev;
 838                                         netif_rx(skb2);
 839                                 }
 840                         }
 841
 842                         prev_dev = sdata->dev;
 843                 }
 844         }
 845         if (prev_dev) {
 846                 skb->dev = prev_dev;
 847                 netif_rx(skb);
 848                 skb = NULL;
 849         }
 850         rcu_read_unlock();
 851         dev_kfree_skb(skb);
 852 }
 853
 854 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
 855                                   struct ieee80211_tx_status *status)
 856 {
 857         struct sk_buff *skb = status->skb;
 858         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 859         struct ieee80211_local *local = hw_to_local(hw);
 860         struct ieee80211_tx_info *info = status->info;
 861         struct sta_info *sta;
 862         __le16 fc;
 863         struct ieee80211_supported_band *sband;
 864         int retry_count;
 865         int rates_idx;
 866         bool send_to_cooked;
 867         bool acked;
 868         struct ieee80211_bar *bar;
 869         int shift = 0;
 870         int tid = IEEE80211_NUM_TIDS;
 871
 872         rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
 873
 874         sband = local->hw.wiphy->bands[info->band];
 875         fc = hdr->frame_control;
 876
 877         if (status->sta) {
 878                 sta = container_of(status->sta, struct sta_info, sta);
 879                 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 880
 881                 if (info->flags & IEEE80211_TX_STATUS_EOSP)
 882                         clear_sta_flag(sta, WLAN_STA_SP);
 883
 884                 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
 885
 886                 /* mesh Peer Service Period support */
 887                 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
 888                     ieee80211_is_data_qos(fc))
 889                         ieee80211_mpsp_trigger_process(
 890                                 ieee80211_get_qos_ctl(hdr), sta, true, acked);
 891
 892                 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
 893                         /*
 894                          * The STA is in power save mode, so assume
 895                          * that this TX packet failed because of that.
 896                          */
 897                         ieee80211_handle_filtered_frame(local, sta, skb);
 898                         return;
 899                 }
 900
 901                 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
 902                     (ieee80211_is_data(hdr->frame_control)) &&
 903                     (rates_idx != -1))
 904                         sta->tx_stats.last_rate =
 905                                 info->status.rates[rates_idx];
 906
 907                 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
 908                     (ieee80211_is_data_qos(fc))) {
 909                         u16 ssn;
 910                         u8 *qc;
 911
 912                         qc = ieee80211_get_qos_ctl(hdr);
 913                         tid = qc[0] & 0xf;
 914                         ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
 915                                                 & IEEE80211_SCTL_SEQ);
 916                         ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
 917                                            tid, ssn);
 918                 } else if (ieee80211_is_data_qos(fc)) {
 919                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 920
 921                         tid = qc[0] & 0xf;
 922                 }
 923
 924                 if (!acked && ieee80211_is_back_req(fc)) {
 925                         u16 control;
 926
 927                         /*
 928                          * BAR failed, store the last SSN and retry sending
 929                          * the BAR when the next unicast transmission on the
 930                          * same TID succeeds.
 931                          */
 932                         bar = (struct ieee80211_bar *) skb->data;
 933                         control = le16_to_cpu(bar->control);
 934                         if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
 935                                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 936
 937                                 tid = (control &
 938                                        IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 939                                       IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 940
 941                                 ieee80211_set_bar_pending(sta, tid, ssn);
 942                         }
 943                 }
 944
 945                 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
 946                         ieee80211_handle_filtered_frame(local, sta, skb);
 947                         return;
 948                 } else {
 949                         if (!acked)
 950                                 sta->status_stats.retry_failed++;
 951                         sta->status_stats.retry_count += retry_count;
 952
 953                         if (ieee80211_is_data_present(fc)) {
 954                                 if (!acked)
 955                                         sta->status_stats.msdu_failed[tid]++;
 956
 957                                 sta->status_stats.msdu_retries[tid] +=
 958                                         retry_count;
 959                         }
 960                 }
 961
 962                 rate_control_tx_status(local, sband, status);
 963                 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
 964                         ieee80211s_update_metric(local, sta, status);
 965
 966                 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
 967                         ieee80211_frame_acked(sta, skb);
 968
 969                 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
 970                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 971                         ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
 972                                                 acked, info->status.tx_time);
 973
 974                 if (info->status.tx_time &&
 975                     wiphy_ext_feature_isset(local->hw.wiphy,
 976                                             NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
 977                         ieee80211_sta_register_airtime(&sta->sta, tid,
 978                                                        info->status.tx_time, 0);
 979
 980                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
 981                         if (info->flags & IEEE80211_TX_STAT_ACK) {
 982                                 if (sta->status_stats.lost_packets)
 983                                         sta->status_stats.lost_packets = 0;
 984
 985                                 /* Track when last TDLS packet was ACKed */
 986                                 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
 987                                         sta->status_stats.last_tdls_pkt_time =
 988                                                 jiffies;
 989                         } else {
 990                                 ieee80211_lost_packet(sta, info);
 991                         }
 992                 }
 993         }
 994
 995         /* SNMP counters
 996          * Fragments are passed to low-level drivers as separate skbs, so these
 997          * are actually fragments, not frames. Update frame counters only for
 998          * the first fragment of the frame. */
 999         if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1000             (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1001                 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1002                         I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1003                         if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1004                                 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1005                         if (retry_count > 0)
1006                                 I802_DEBUG_INC(local->dot11RetryCount);
1007                         if (retry_count > 1)
1008                                 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1009                 }
1010
1011                 /* This counter shall be incremented for an acknowledged MPDU
1012                  * with an individual address in the address 1 field or an MPDU
1013                  * with a multicast address in the address 1 field of type Data
1014                  * or Management. */
1015                 if (!is_multicast_ether_addr(hdr->addr1) ||
1016                     ieee80211_is_data(fc) ||
1017                     ieee80211_is_mgmt(fc))
1018                         I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1019         } else {
1020                 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1021                         I802_DEBUG_INC(local->dot11FailedCount);
1022         }
1023
1024         if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) &&
1025             ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1026             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1027             local->ps_sdata && !(local->scanning)) {
1028                 if (info->flags & IEEE80211_TX_STAT_ACK) {
1029                         local->ps_sdata->u.mgd.flags |=
1030                                         IEEE80211_STA_NULLFUNC_ACKED;
1031                 } else
1032                         mod_timer(&local->dynamic_ps_timer, jiffies +
1033                                         msecs_to_jiffies(10));
1034         }
1035
1036         ieee80211_report_used_skb(local, skb, false);
1037
1038         /* this was a transmitted frame, but now we want to reuse it */
1039         skb_orphan(skb);
1040
1041         /* Need to make a copy before skb->cb gets cleared */
1042         send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1043                          !(ieee80211_is_data(fc));
1044
1045         /*
1046          * This is a bit racy but we can avoid a lot of work
1047          * with this test...
1048          */
1049         if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1050                 dev_kfree_skb(skb);
1051                 return;
1052         }
1053
1054         /* send to monitor interfaces */
1055         ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1056                              send_to_cooked, status);
1057 }
1058
1059 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1060 {
1061         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1062         struct ieee80211_local *local = hw_to_local(hw);
1063         struct ieee80211_tx_status status = {
1064                 .skb = skb,
1065                 .info = IEEE80211_SKB_CB(skb),
1066         };
1067         struct rhlist_head *tmp;
1068         struct sta_info *sta;
1069
1070         rcu_read_lock();
1071
1072         for_each_sta_info(local, hdr->addr1, sta, tmp) {
1073                 /* skip wrong virtual interface */
1074                 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
1075                         continue;
1076
1077                 status.sta = &sta->sta;
1078                 break;
1079         }
1080
1081         __ieee80211_tx_status(hw, &status);
1082         rcu_read_unlock();
1083 }
1084 EXPORT_SYMBOL(ieee80211_tx_status);
1085
1086 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1087                              struct ieee80211_tx_status *status)
1088 {
1089         struct ieee80211_local *local = hw_to_local(hw);
1090         struct ieee80211_tx_info *info = status->info;
1091         struct ieee80211_sta *pubsta = status->sta;
1092         struct ieee80211_supported_band *sband;
1093         int retry_count;
1094         bool acked, noack_success;
1095
1096         if (status->skb)
1097                 return __ieee80211_tx_status(hw, status);
1098
1099         if (!status->sta)
1100                 return;
1101
1102         ieee80211_tx_get_rates(hw, info, &retry_count);
1103
1104         sband = hw->wiphy->bands[info->band];
1105
1106         acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1107         noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1108
1109         if (pubsta) {
1110                 struct sta_info *sta;
1111
1112                 sta = container_of(pubsta, struct sta_info, sta);
1113
1114                 if (!acked)
1115                         sta->status_stats.retry_failed++;
1116                 sta->status_stats.retry_count += retry_count;
1117
1118                 if (acked) {
1119                         sta->status_stats.last_ack = jiffies;
1120
1121                         if (sta->status_stats.lost_packets)
1122                                 sta->status_stats.lost_packets = 0;
1123
1124                         /* Track when last TDLS packet was ACKed */
1125                         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1126                                 sta->status_stats.last_tdls_pkt_time = jiffies;
1127                 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1128                         return;
1129                 } else {
1130                         ieee80211_lost_packet(sta, info);
1131                 }
1132
1133                 rate_control_tx_status(local, sband, status);
1134                 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1135                         ieee80211s_update_metric(local, sta, status);
1136         }
1137
1138         if (acked || noack_success) {
1139                 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1140                 if (!pubsta)
1141                         I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1142                 if (retry_count > 0)
1143                         I802_DEBUG_INC(local->dot11RetryCount);
1144                 if (retry_count > 1)
1145                         I802_DEBUG_INC(local->dot11MultipleRetryCount);
1146         } else {
1147                 I802_DEBUG_INC(local->dot11FailedCount);
1148         }
1149 }
1150 EXPORT_SYMBOL(ieee80211_tx_status_ext);
1151
1152 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1153                               struct ieee80211_sta *pubsta,
1154                               struct ieee80211_tx_info *info)
1155 {
1156         struct ieee80211_local *local = hw_to_local(hw);
1157         struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1158         struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1159         struct ieee80211_tx_status status = {
1160                 .info = info,
1161                 .sta = pubsta,
1162         };
1163
1164         rate_control_tx_status(local, sband, &status);
1165
1166         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1167                 sta->tx_stats.last_rate = info->status.rates[0];
1168 }
1169 EXPORT_SYMBOL(ieee80211_tx_rate_update);
1170
1171 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1172 {
1173         struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1174         cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1175                                     num_packets, GFP_ATOMIC);
1176 }
1177 EXPORT_SYMBOL(ieee80211_report_low_ack);
1178
1179 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1180 {
1181         struct ieee80211_local *local = hw_to_local(hw);
1182
1183         ieee80211_report_used_skb(local, skb, true);
1184         dev_kfree_skb_any(skb);
1185 }
1186 EXPORT_SYMBOL(ieee80211_free_txskb);
1187
1188 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1189                               struct sk_buff_head *skbs)
1190 {
1191         struct sk_buff *skb;
1192
1193         while ((skb = __skb_dequeue(skbs)))
1194                 ieee80211_free_txskb(hw, skb);
1195 }