linux/net/mac80211/status.c
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   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
  21void 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}
  41EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
  42
  43static 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_TX_CTL_HW_80211_ENCAP)) {
  54                ieee80211_free_txskb(&local->hw, skb);
  55                return;
  56        }
  57
  58        /*
  59         * This skb 'survived' a round-trip through the driver, and
  60         * hopefully the driver didn't mangle it too badly. However,
  61         * we can definitely not rely on the control information
  62         * being correct. Clear it so we don't get junk there, and
  63         * indicate that it needs new processing, but must not be
  64         * modified/encrypted again.
  65         */
  66        memset(&info->control, 0, sizeof(info->control));
  67
  68        info->control.jiffies = jiffies;
  69        info->control.vif = &sta->sdata->vif;
  70        info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
  71        info->flags |= IEEE80211_TX_INTFL_RETRANSMISSION;
  72        info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
  73
  74        sta->status_stats.filtered++;
  75
  76        /*
  77         * Clear more-data bit on filtered frames, it might be set
  78         * but later frames might time out so it might have to be
  79         * clear again ... It's all rather unlikely (this frame
  80         * should time out first, right?) but let's not confuse
  81         * peers unnecessarily.
  82         */
  83        if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
  84                hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
  85
  86        if (ieee80211_is_data_qos(hdr->frame_control)) {
  87                u8 *p = ieee80211_get_qos_ctl(hdr);
  88                int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
  89
  90                /*
  91                 * Clear EOSP if set, this could happen e.g.
  92                 * if an absence period (us being a P2P GO)
  93                 * shortens the SP.
  94                 */
  95                if (*p & IEEE80211_QOS_CTL_EOSP)
  96                        *p &= ~IEEE80211_QOS_CTL_EOSP;
  97                ac = ieee80211_ac_from_tid(tid);
  98        } else {
  99                ac = IEEE80211_AC_BE;
 100        }
 101
 102        /*
 103         * Clear the TX filter mask for this STA when sending the next
 104         * packet. If the STA went to power save mode, this will happen
 105         * when it wakes up for the next time.
 106         */
 107        set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
 108        ieee80211_clear_fast_xmit(sta);
 109
 110        /*
 111         * This code races in the following way:
 112         *
 113         *  (1) STA sends frame indicating it will go to sleep and does so
 114         *  (2) hardware/firmware adds STA to filter list, passes frame up
 115         *  (3) hardware/firmware processes TX fifo and suppresses a frame
 116         *  (4) we get TX status before having processed the frame and
 117         *      knowing that the STA has gone to sleep.
 118         *
 119         * This is actually quite unlikely even when both those events are
 120         * processed from interrupts coming in quickly after one another or
 121         * even at the same time because we queue both TX status events and
 122         * RX frames to be processed by a tasklet and process them in the
 123         * same order that they were received or TX status last. Hence, there
 124         * is no race as long as the frame RX is processed before the next TX
 125         * status, which drivers can ensure, see below.
 126         *
 127         * Note that this can only happen if the hardware or firmware can
 128         * actually add STAs to the filter list, if this is done by the
 129         * driver in response to set_tim() (which will only reduce the race
 130         * this whole filtering tries to solve, not completely solve it)
 131         * this situation cannot happen.
 132         *
 133         * To completely solve this race drivers need to make sure that they
 134         *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
 135         *      functions and
 136         *  (b) always process RX events before TX status events if ordering
 137         *      can be unknown, for example with different interrupt status
 138         *      bits.
 139         *  (c) if PS mode transitions are manual (i.e. the flag
 140         *      %IEEE80211_HW_AP_LINK_PS is set), always process PS state
 141         *      changes before calling TX status events if ordering can be
 142         *      unknown.
 143         */
 144        if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
 145            skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
 146                skb_queue_tail(&sta->tx_filtered[ac], skb);
 147                sta_info_recalc_tim(sta);
 148
 149                if (!timer_pending(&local->sta_cleanup))
 150                        mod_timer(&local->sta_cleanup,
 151                                  round_jiffies(jiffies +
 152                                                STA_INFO_CLEANUP_INTERVAL));
 153                return;
 154        }
 155
 156        if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
 157            !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
 158                /* Software retry the packet once */
 159                info->flags |= IEEE80211_TX_INTFL_RETRIED;
 160                ieee80211_add_pending_skb(local, skb);
 161                return;
 162        }
 163
 164        ps_dbg_ratelimited(sta->sdata,
 165                           "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
 166                           skb_queue_len(&sta->tx_filtered[ac]),
 167                           !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
 168        ieee80211_free_txskb(&local->hw, skb);
 169}
 170
 171static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
 172{
 173        struct tid_ampdu_tx *tid_tx;
 174
 175        tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
 176        if (!tid_tx || !tid_tx->bar_pending)
 177                return;
 178
 179        tid_tx->bar_pending = false;
 180        ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
 181}
 182
 183static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
 184{
 185        struct ieee80211_mgmt *mgmt = (void *) skb->data;
 186        struct ieee80211_local *local = sta->local;
 187        struct ieee80211_sub_if_data *sdata = sta->sdata;
 188
 189        if (ieee80211_is_data_qos(mgmt->frame_control)) {
 190                struct ieee80211_hdr *hdr = (void *) skb->data;
 191                u8 *qc = ieee80211_get_qos_ctl(hdr);
 192                u16 tid = qc[0] & 0xf;
 193
 194                ieee80211_check_pending_bar(sta, hdr->addr1, tid);
 195        }
 196
 197        if (ieee80211_is_action(mgmt->frame_control) &&
 198            !ieee80211_has_protected(mgmt->frame_control) &&
 199            mgmt->u.action.category == WLAN_CATEGORY_HT &&
 200            mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
 201            ieee80211_sdata_running(sdata)) {
 202                enum ieee80211_smps_mode smps_mode;
 203
 204                switch (mgmt->u.action.u.ht_smps.smps_control) {
 205                case WLAN_HT_SMPS_CONTROL_DYNAMIC:
 206                        smps_mode = IEEE80211_SMPS_DYNAMIC;
 207                        break;
 208                case WLAN_HT_SMPS_CONTROL_STATIC:
 209                        smps_mode = IEEE80211_SMPS_STATIC;
 210                        break;
 211                case WLAN_HT_SMPS_CONTROL_DISABLED:
 212                default: /* shouldn't happen since we don't send that */
 213                        smps_mode = IEEE80211_SMPS_OFF;
 214                        break;
 215                }
 216
 217                if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 218                        /*
 219                         * This update looks racy, but isn't -- if we come
 220                         * here we've definitely got a station that we're
 221                         * talking to, and on a managed interface that can
 222                         * only be the AP. And the only other place updating
 223                         * this variable in managed mode is before association.
 224                         */
 225                        sdata->smps_mode = smps_mode;
 226                        ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
 227                } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
 228                           sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
 229                        sta->known_smps_mode = smps_mode;
 230                }
 231        }
 232}
 233
 234static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
 235{
 236        struct tid_ampdu_tx *tid_tx;
 237
 238        tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
 239        if (!tid_tx)
 240                return;
 241
 242        tid_tx->failed_bar_ssn = ssn;
 243        tid_tx->bar_pending = true;
 244}
 245
 246static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
 247                                     struct ieee80211_tx_status *status)
 248{
 249        int len = sizeof(struct ieee80211_radiotap_header);
 250
 251        /* IEEE80211_RADIOTAP_RATE rate */
 252        if (status && status->rate && !(status->rate->flags &
 253                                        (RATE_INFO_FLAGS_MCS |
 254                                         RATE_INFO_FLAGS_DMG |
 255                                         RATE_INFO_FLAGS_EDMG |
 256                                         RATE_INFO_FLAGS_VHT_MCS |
 257                                         RATE_INFO_FLAGS_HE_MCS)))
 258                len += 2;
 259        else if (info->status.rates[0].idx >= 0 &&
 260                 !(info->status.rates[0].flags &
 261                   (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
 262                len += 2;
 263
 264        /* IEEE80211_RADIOTAP_TX_FLAGS */
 265        len += 2;
 266
 267        /* IEEE80211_RADIOTAP_DATA_RETRIES */
 268        len += 1;
 269
 270        /* IEEE80211_RADIOTAP_MCS
 271         * IEEE80211_RADIOTAP_VHT */
 272        if (status && status->rate) {
 273                if (status->rate->flags & RATE_INFO_FLAGS_MCS)
 274                        len += 3;
 275                else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)
 276                        len = ALIGN(len, 2) + 12;
 277                else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)
 278                        len = ALIGN(len, 2) + 12;
 279        } else if (info->status.rates[0].idx >= 0) {
 280                if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
 281                        len += 3;
 282                else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
 283                        len = ALIGN(len, 2) + 12;
 284        }
 285
 286        return len;
 287}
 288
 289static void
 290ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
 291                                 struct ieee80211_supported_band *sband,
 292                                 struct sk_buff *skb, int retry_count,
 293                                 int rtap_len, int shift,
 294                                 struct ieee80211_tx_status *status)
 295{
 296        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 297        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 298        struct ieee80211_radiotap_header *rthdr;
 299        unsigned char *pos;
 300        u16 legacy_rate = 0;
 301        u16 txflags;
 302
 303        rthdr = skb_push(skb, rtap_len);
 304
 305        memset(rthdr, 0, rtap_len);
 306        rthdr->it_len = cpu_to_le16(rtap_len);
 307        rthdr->it_present =
 308                cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 309                            (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 310        pos = (unsigned char *)(rthdr + 1);
 311
 312        /*
 313         * XXX: Once radiotap gets the bitmap reset thing the vendor
 314         *      extensions proposal contains, we can actually report
 315         *      the whole set of tries we did.
 316         */
 317
 318        /* IEEE80211_RADIOTAP_RATE */
 319
 320        if (status && status->rate) {
 321                if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS |
 322                                             RATE_INFO_FLAGS_DMG |
 323                                             RATE_INFO_FLAGS_EDMG |
 324                                             RATE_INFO_FLAGS_VHT_MCS |
 325                                             RATE_INFO_FLAGS_HE_MCS)))
 326                        legacy_rate = status->rate->legacy;
 327        } else if (info->status.rates[0].idx >= 0 &&
 328                 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
 329                                                  IEEE80211_TX_RC_VHT_MCS)))
 330                legacy_rate =
 331                        sband->bitrates[info->status.rates[0].idx].bitrate;
 332
 333        if (legacy_rate) {
 334                rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
 335                *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
 336                /* padding for tx flags */
 337                pos += 2;
 338        }
 339
 340        /* IEEE80211_RADIOTAP_TX_FLAGS */
 341        txflags = 0;
 342        if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
 343            !is_multicast_ether_addr(hdr->addr1))
 344                txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
 345
 346        if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
 347                txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
 348        if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
 349                txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
 350
 351        put_unaligned_le16(txflags, pos);
 352        pos += 2;
 353
 354        /* IEEE80211_RADIOTAP_DATA_RETRIES */
 355        /* for now report the total retry_count */
 356        *pos = retry_count;
 357        pos++;
 358
 359        if (status && status->rate &&
 360            (status->rate->flags & RATE_INFO_FLAGS_MCS)) {
 361                rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
 362                pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 363                         IEEE80211_RADIOTAP_MCS_HAVE_GI |
 364                         IEEE80211_RADIOTAP_MCS_HAVE_BW;
 365                if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
 366                        pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
 367                if (status->rate->bw == RATE_INFO_BW_40)
 368                        pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
 369                pos[2] = status->rate->mcs;
 370                pos += 3;
 371        } else if (status && status->rate &&
 372                   (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
 373                u16 known = local->hw.radiotap_vht_details &
 374                        (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 375                         IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
 376
 377                rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
 378
 379                /* required alignment from rthdr */
 380                pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 381
 382                /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
 383                put_unaligned_le16(known, pos);
 384                pos += 2;
 385
 386                /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
 387                if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
 388                        *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
 389                pos++;
 390
 391                /* u8 bandwidth */
 392                switch (status->rate->bw) {
 393                case RATE_INFO_BW_160:
 394                        *pos = 11;
 395                        break;
 396                case RATE_INFO_BW_80:
 397                        *pos = 4;
 398                        break;
 399                case RATE_INFO_BW_40:
 400                        *pos = 1;
 401                        break;
 402                default:
 403                        *pos = 0;
 404                        break;
 405                }
 406                pos++;
 407
 408                /* u8 mcs_nss[4] */
 409                *pos = (status->rate->mcs << 4) | status->rate->nss;
 410                pos += 4;
 411
 412                /* u8 coding */
 413                pos++;
 414                /* u8 group_id */
 415                pos++;
 416                /* u16 partial_aid */
 417                pos += 2;
 418        } else if (status && status->rate &&
 419                   (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) {
 420                struct ieee80211_radiotap_he *he;
 421
 422                rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
 423
 424                /* required alignment from rthdr */
 425                pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 426                he = (struct ieee80211_radiotap_he *)pos;
 427
 428                he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
 429                                        IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
 430                                        IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
 431                                        IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
 432
 433                he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
 434
 435#define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
 436
 437                he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss);
 438
 439#define CHECK_GI(s) \
 440        BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
 441        (int)NL80211_RATE_INFO_HE_GI_##s)
 442
 443                CHECK_GI(0_8);
 444                CHECK_GI(1_6);
 445                CHECK_GI(3_2);
 446
 447                he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs);
 448                he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm);
 449
 450                he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi);
 451
 452                switch (status->rate->bw) {
 453                case RATE_INFO_BW_20:
 454                        he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 455                                             IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
 456                        break;
 457                case RATE_INFO_BW_40:
 458                        he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 459                                             IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
 460                        break;
 461                case RATE_INFO_BW_80:
 462                        he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 463                                             IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
 464                        break;
 465                case RATE_INFO_BW_160:
 466                        he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 467                                             IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
 468                        break;
 469                case RATE_INFO_BW_HE_RU:
 470#define CHECK_RU_ALLOC(s) \
 471        BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
 472        NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
 473
 474                        CHECK_RU_ALLOC(26);
 475                        CHECK_RU_ALLOC(52);
 476                        CHECK_RU_ALLOC(106);
 477                        CHECK_RU_ALLOC(242);
 478                        CHECK_RU_ALLOC(484);
 479                        CHECK_RU_ALLOC(996);
 480                        CHECK_RU_ALLOC(2x996);
 481
 482                        he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 483                                             status->rate->he_ru_alloc + 4);
 484                        break;
 485                default:
 486                        WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw);
 487                }
 488
 489                pos += sizeof(struct ieee80211_radiotap_he);
 490        }
 491
 492        if ((status && status->rate) || info->status.rates[0].idx < 0)
 493                return;
 494
 495        /* IEEE80211_RADIOTAP_MCS
 496         * IEEE80211_RADIOTAP_VHT */
 497        if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
 498                rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
 499                pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 500                         IEEE80211_RADIOTAP_MCS_HAVE_GI |
 501                         IEEE80211_RADIOTAP_MCS_HAVE_BW;
 502                if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 503                        pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
 504                if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 505                        pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
 506                if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
 507                        pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
 508                pos[2] = info->status.rates[0].idx;
 509                pos += 3;
 510        } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
 511                u16 known = local->hw.radiotap_vht_details &
 512                        (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 513                         IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
 514
 515                rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
 516
 517                /* required alignment from rthdr */
 518                pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 519
 520                /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
 521                put_unaligned_le16(known, pos);
 522                pos += 2;
 523
 524                /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
 525                if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 526                        *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
 527                pos++;
 528
 529                /* u8 bandwidth */
 530                if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 531                        *pos = 1;
 532                else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 533                        *pos = 4;
 534                else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 535                        *pos = 11;
 536                else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
 537                        *pos = 0;
 538                pos++;
 539
 540                /* u8 mcs_nss[4] */
 541                *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
 542                        ieee80211_rate_get_vht_nss(&info->status.rates[0]);
 543                pos += 4;
 544
 545                /* u8 coding */
 546                pos++;
 547                /* u8 group_id */
 548                pos++;
 549                /* u16 partial_aid */
 550                pos += 2;
 551        }
 552}
 553
 554/*
 555 * Handles the tx for TDLS teardown frames.
 556 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
 557 */
 558static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
 559                                        struct ieee80211_sub_if_data *sdata,
 560                                        struct sk_buff *skb, u32 flags)
 561{
 562        struct sk_buff *teardown_skb;
 563        struct sk_buff *orig_teardown_skb;
 564        bool is_teardown = false;
 565
 566        /* Get the teardown data we need and free the lock */
 567        spin_lock(&sdata->u.mgd.teardown_lock);
 568        teardown_skb = sdata->u.mgd.teardown_skb;
 569        orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
 570        if ((skb == orig_teardown_skb) && teardown_skb) {
 571                sdata->u.mgd.teardown_skb = NULL;
 572                sdata->u.mgd.orig_teardown_skb = NULL;
 573                is_teardown = true;
 574        }
 575        spin_unlock(&sdata->u.mgd.teardown_lock);
 576
 577        if (is_teardown) {
 578                /* This mechanism relies on being able to get ACKs */
 579                WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
 580
 581                /* Check if peer has ACKed */
 582                if (flags & IEEE80211_TX_STAT_ACK) {
 583                        dev_kfree_skb_any(teardown_skb);
 584                } else {
 585                        tdls_dbg(sdata,
 586                                 "TDLS Resending teardown through AP\n");
 587
 588                        ieee80211_subif_start_xmit(teardown_skb, skb->dev);
 589                }
 590        }
 591}
 592
 593static struct ieee80211_sub_if_data *
 594ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
 595{
 596        struct ieee80211_sub_if_data *sdata;
 597
 598        if (skb->dev) {
 599                list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 600                        if (!sdata->dev)
 601                                continue;
 602
 603                        if (skb->dev == sdata->dev)
 604                                return sdata;
 605                }
 606
 607                return NULL;
 608        }
 609
 610        return rcu_dereference(local->p2p_sdata);
 611}
 612
 613static void ieee80211_report_ack_skb(struct ieee80211_local *local,
 614                                     struct ieee80211_tx_info *info,
 615                                     bool acked, bool dropped)
 616{
 617        struct sk_buff *skb;
 618        unsigned long flags;
 619
 620        spin_lock_irqsave(&local->ack_status_lock, flags);
 621        skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
 622        spin_unlock_irqrestore(&local->ack_status_lock, flags);
 623
 624        if (!skb)
 625                return;
 626
 627        if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
 628                u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
 629                struct ieee80211_sub_if_data *sdata;
 630                struct ieee80211_hdr *hdr = (void *)skb->data;
 631
 632                rcu_read_lock();
 633                sdata = ieee80211_sdata_from_skb(local, skb);
 634                if (sdata) {
 635                        if (skb->protocol == sdata->control_port_protocol ||
 636                            skb->protocol == cpu_to_be16(ETH_P_PREAUTH))
 637                                cfg80211_control_port_tx_status(&sdata->wdev,
 638                                                                cookie,
 639                                                                skb->data,
 640                                                                skb->len,
 641                                                                acked,
 642                                                                GFP_ATOMIC);
 643                        else if (ieee80211_is_any_nullfunc(hdr->frame_control))
 644                                cfg80211_probe_status(sdata->dev, hdr->addr1,
 645                                                      cookie, acked,
 646                                                      info->status.ack_signal,
 647                                                      info->status.is_valid_ack_signal,
 648                                                      GFP_ATOMIC);
 649                        else if (ieee80211_is_mgmt(hdr->frame_control))
 650                                cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
 651                                                        skb->data, skb->len,
 652                                                        acked, GFP_ATOMIC);
 653                        else
 654                                pr_warn("Unknown status report in ack skb\n");
 655
 656                }
 657                rcu_read_unlock();
 658
 659                dev_kfree_skb_any(skb);
 660        } else if (dropped) {
 661                dev_kfree_skb_any(skb);
 662        } else {
 663                /* consumes skb */
 664                skb_complete_wifi_ack(skb, acked);
 665        }
 666}
 667
 668static void ieee80211_report_used_skb(struct ieee80211_local *local,
 669                                      struct sk_buff *skb, bool dropped)
 670{
 671        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 672        u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
 673        struct ieee80211_hdr *hdr = (void *)skb->data;
 674        bool acked = info->flags & IEEE80211_TX_STAT_ACK;
 675
 676        if (dropped)
 677                acked = false;
 678
 679        if (tx_time_est) {
 680                struct sta_info *sta;
 681
 682                rcu_read_lock();
 683
 684                sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
 685                ieee80211_sta_update_pending_airtime(local, sta,
 686                                                     skb_get_queue_mapping(skb),
 687                                                     tx_time_est,
 688                                                     true);
 689                rcu_read_unlock();
 690        }
 691
 692        if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
 693                struct ieee80211_sub_if_data *sdata;
 694
 695                rcu_read_lock();
 696
 697                sdata = ieee80211_sdata_from_skb(local, skb);
 698
 699                if (!sdata) {
 700                        skb->dev = NULL;
 701                } else {
 702                        unsigned int hdr_size =
 703                                ieee80211_hdrlen(hdr->frame_control);
 704
 705                        /* Check to see if packet is a TDLS teardown packet */
 706                        if (ieee80211_is_data(hdr->frame_control) &&
 707                            (ieee80211_get_tdls_action(skb, hdr_size) ==
 708                             WLAN_TDLS_TEARDOWN))
 709                                ieee80211_tdls_td_tx_handle(local, sdata, skb,
 710                                                            info->flags);
 711                        else
 712                                ieee80211_mgd_conn_tx_status(sdata,
 713                                                             hdr->frame_control,
 714                                                             acked);
 715                }
 716
 717                rcu_read_unlock();
 718        } else if (info->ack_frame_id) {
 719                ieee80211_report_ack_skb(local, info, acked, dropped);
 720        }
 721
 722        if (!dropped && skb->destructor) {
 723                skb->wifi_acked_valid = 1;
 724                skb->wifi_acked = acked;
 725        }
 726
 727        ieee80211_led_tx(local);
 728
 729        if (skb_has_frag_list(skb)) {
 730                kfree_skb_list(skb_shinfo(skb)->frag_list);
 731                skb_shinfo(skb)->frag_list = NULL;
 732        }
 733}
 734
 735/*
 736 * Use a static threshold for now, best value to be determined
 737 * by testing ...
 738 * Should it depend on:
 739 *  - on # of retransmissions
 740 *  - current throughput (higher value for higher tpt)?
 741 */
 742#define STA_LOST_PKT_THRESHOLD  50
 743#define STA_LOST_PKT_TIME       HZ              /* 1 sec since last ACK */
 744#define STA_LOST_TDLS_PKT_THRESHOLD     10
 745#define STA_LOST_TDLS_PKT_TIME          (10*HZ) /* 10secs since last ACK */
 746
 747static void ieee80211_lost_packet(struct sta_info *sta,
 748                                  struct ieee80211_tx_info *info)
 749{
 750        unsigned long pkt_time = STA_LOST_PKT_TIME;
 751        unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
 752
 753        /* If driver relies on its own algorithm for station kickout, skip
 754         * mac80211 packet loss mechanism.
 755         */
 756        if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
 757                return;
 758
 759        /* This packet was aggregated but doesn't carry status info */
 760        if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 761            !(info->flags & IEEE80211_TX_STAT_AMPDU))
 762                return;
 763
 764        sta->status_stats.lost_packets++;
 765        if (sta->sta.tdls) {
 766                pkt_time = STA_LOST_TDLS_PKT_TIME;
 767                pkt_thr = STA_LOST_PKT_THRESHOLD;
 768        }
 769
 770        /*
 771         * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
 772         * of the last packets were lost, and that no ACK was received in the
 773         * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
 774         * mechanism.
 775         * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
 776         */
 777        if (sta->status_stats.lost_packets < pkt_thr ||
 778            !time_after(jiffies, sta->status_stats.last_pkt_time + pkt_time))
 779                return;
 780
 781        cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
 782                                    sta->status_stats.lost_packets, GFP_ATOMIC);
 783        sta->status_stats.lost_packets = 0;
 784}
 785
 786static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
 787                                  struct ieee80211_tx_info *info,
 788                                  int *retry_count)
 789{
 790        int count = -1;
 791        int i;
 792
 793        for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 794                if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 795                    !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
 796                        /* just the first aggr frame carry status info */
 797                        info->status.rates[i].idx = -1;
 798                        info->status.rates[i].count = 0;
 799                        break;
 800                } else if (info->status.rates[i].idx < 0) {
 801                        break;
 802                } else if (i >= hw->max_report_rates) {
 803                        /* the HW cannot have attempted that rate */
 804                        info->status.rates[i].idx = -1;
 805                        info->status.rates[i].count = 0;
 806                        break;
 807                }
 808
 809                count += info->status.rates[i].count;
 810        }
 811
 812        if (count < 0)
 813                count = 0;
 814
 815        *retry_count = count;
 816        return i - 1;
 817}
 818
 819void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
 820                          struct ieee80211_supported_band *sband,
 821                          int retry_count, int shift, bool send_to_cooked,
 822                          struct ieee80211_tx_status *status)
 823{
 824        struct sk_buff *skb2;
 825        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 826        struct ieee80211_sub_if_data *sdata;
 827        struct net_device *prev_dev = NULL;
 828        int rtap_len;
 829
 830        /* send frame to monitor interfaces now */
 831        rtap_len = ieee80211_tx_radiotap_len(info, status);
 832        if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
 833                pr_err("ieee80211_tx_status: headroom too small\n");
 834                dev_kfree_skb(skb);
 835                return;
 836        }
 837        ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
 838                                         rtap_len, shift, status);
 839
 840        /* XXX: is this sufficient for BPF? */
 841        skb_reset_mac_header(skb);
 842        skb->ip_summed = CHECKSUM_UNNECESSARY;
 843        skb->pkt_type = PACKET_OTHERHOST;
 844        skb->protocol = htons(ETH_P_802_2);
 845        memset(skb->cb, 0, sizeof(skb->cb));
 846
 847        rcu_read_lock();
 848        list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 849                if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
 850                        if (!ieee80211_sdata_running(sdata))
 851                                continue;
 852
 853                        if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
 854                            !send_to_cooked)
 855                                continue;
 856
 857                        if (prev_dev) {
 858                                skb2 = skb_clone(skb, GFP_ATOMIC);
 859                                if (skb2) {
 860                                        skb2->dev = prev_dev;
 861                                        netif_rx(skb2);
 862                                }
 863                        }
 864
 865                        prev_dev = sdata->dev;
 866                }
 867        }
 868        if (prev_dev) {
 869                skb->dev = prev_dev;
 870                netif_rx(skb);
 871                skb = NULL;
 872        }
 873        rcu_read_unlock();
 874        dev_kfree_skb(skb);
 875}
 876
 877static void __ieee80211_tx_status(struct ieee80211_hw *hw,
 878                                  struct ieee80211_tx_status *status,
 879                                  int rates_idx, int retry_count)
 880{
 881        struct sk_buff *skb = status->skb;
 882        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 883        struct ieee80211_local *local = hw_to_local(hw);
 884        struct ieee80211_tx_info *info = status->info;
 885        struct sta_info *sta;
 886        __le16 fc;
 887        struct ieee80211_supported_band *sband;
 888        bool send_to_cooked;
 889        bool acked;
 890        bool noack_success;
 891        struct ieee80211_bar *bar;
 892        int shift = 0;
 893        int tid = IEEE80211_NUM_TIDS;
 894
 895        sband = local->hw.wiphy->bands[info->band];
 896        fc = hdr->frame_control;
 897
 898        if (status->sta) {
 899                sta = container_of(status->sta, struct sta_info, sta);
 900                shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 901
 902                if (info->flags & IEEE80211_TX_STATUS_EOSP)
 903                        clear_sta_flag(sta, WLAN_STA_SP);
 904
 905                acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
 906                noack_success = !!(info->flags &
 907                                   IEEE80211_TX_STAT_NOACK_TRANSMITTED);
 908
 909                /* mesh Peer Service Period support */
 910                if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
 911                    ieee80211_is_data_qos(fc))
 912                        ieee80211_mpsp_trigger_process(
 913                                ieee80211_get_qos_ctl(hdr), sta, true, acked);
 914
 915                if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
 916                    (ieee80211_is_data(hdr->frame_control)) &&
 917                    (rates_idx != -1))
 918                        sta->tx_stats.last_rate =
 919                                info->status.rates[rates_idx];
 920
 921                if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
 922                    (ieee80211_is_data_qos(fc))) {
 923                        u16 ssn;
 924                        u8 *qc;
 925
 926                        qc = ieee80211_get_qos_ctl(hdr);
 927                        tid = qc[0] & 0xf;
 928                        ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
 929                                                & IEEE80211_SCTL_SEQ);
 930                        ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
 931                                           tid, ssn);
 932                } else if (ieee80211_is_data_qos(fc)) {
 933                        u8 *qc = ieee80211_get_qos_ctl(hdr);
 934
 935                        tid = qc[0] & 0xf;
 936                }
 937
 938                if (!acked && ieee80211_is_back_req(fc)) {
 939                        u16 control;
 940
 941                        /*
 942                         * BAR failed, store the last SSN and retry sending
 943                         * the BAR when the next unicast transmission on the
 944                         * same TID succeeds.
 945                         */
 946                        bar = (struct ieee80211_bar *) skb->data;
 947                        control = le16_to_cpu(bar->control);
 948                        if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
 949                                u16 ssn = le16_to_cpu(bar->start_seq_num);
 950
 951                                tid = (control &
 952                                       IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 953                                      IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 954
 955                                ieee80211_set_bar_pending(sta, tid, ssn);
 956                        }
 957                }
 958
 959                if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
 960                        ieee80211_handle_filtered_frame(local, sta, skb);
 961                        return;
 962                } else if (ieee80211_is_data_present(fc)) {
 963                        if (!acked && !noack_success)
 964                                sta->status_stats.msdu_failed[tid]++;
 965
 966                        sta->status_stats.msdu_retries[tid] +=
 967                                retry_count;
 968                }
 969
 970                if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
 971                        ieee80211_frame_acked(sta, skb);
 972
 973        } else if (wiphy_ext_feature_isset(local->hw.wiphy,
 974                                           NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) {
 975                struct ieee80211_sub_if_data *sdata;
 976                struct ieee80211_txq *txq;
 977                u32 airtime;
 978
 979                /* Account airtime to multicast queue */
 980                sdata = ieee80211_sdata_from_skb(local, skb);
 981
 982                if (sdata && (txq = sdata->vif.txq)) {
 983                        airtime = info->status.tx_time ?:
 984                                ieee80211_calc_expected_tx_airtime(hw,
 985                                                                   &sdata->vif,
 986                                                                   NULL,
 987                                                                   skb->len,
 988                                                                   false);
 989
 990                        ieee80211_register_airtime(txq, airtime, 0);
 991                }
 992        }
 993
 994        /* SNMP counters
 995         * Fragments are passed to low-level drivers as separate skbs, so these
 996         * are actually fragments, not frames. Update frame counters only for
 997         * the first fragment of the frame. */
 998        if ((info->flags & IEEE80211_TX_STAT_ACK) ||
 999            (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1000                if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1001                        I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1002                        if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1003                                I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1004                        if (retry_count > 0)
1005                                I802_DEBUG_INC(local->dot11RetryCount);
1006                        if (retry_count > 1)
1007                                I802_DEBUG_INC(local->dot11MultipleRetryCount);
1008                }
1009
1010                /* This counter shall be incremented for an acknowledged MPDU
1011                 * with an individual address in the address 1 field or an MPDU
1012                 * with a multicast address in the address 1 field of type Data
1013                 * or Management. */
1014                if (!is_multicast_ether_addr(hdr->addr1) ||
1015                    ieee80211_is_data(fc) ||
1016                    ieee80211_is_mgmt(fc))
1017                        I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1018        } else {
1019                if (ieee80211_is_first_frag(hdr->seq_ctrl))
1020                        I802_DEBUG_INC(local->dot11FailedCount);
1021        }
1022
1023        if (ieee80211_is_any_nullfunc(fc) &&
1024            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                mod_timer(&local->dynamic_ps_timer,
1032                          jiffies + msecs_to_jiffies(10));
1033        }
1034
1035        ieee80211_report_used_skb(local, skb, false);
1036
1037        /* this was a transmitted frame, but now we want to reuse it */
1038        skb_orphan(skb);
1039
1040        /* Need to make a copy before skb->cb gets cleared */
1041        send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1042                         !(ieee80211_is_data(fc));
1043
1044        /*
1045         * This is a bit racy but we can avoid a lot of work
1046         * with this test...
1047         */
1048        if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1049                if (status->free_list)
1050                        list_add_tail(&skb->list, status->free_list);
1051                else
1052                        dev_kfree_skb(skb);
1053                return;
1054        }
1055
1056        /* send to monitor interfaces */
1057        ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1058                             send_to_cooked, status);
1059}
1060
1061void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1062{
1063        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1064        struct ieee80211_local *local = hw_to_local(hw);
1065        struct ieee80211_tx_status status = {
1066                .skb = skb,
1067                .info = IEEE80211_SKB_CB(skb),
1068        };
1069        struct sta_info *sta;
1070
1071        rcu_read_lock();
1072
1073        sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
1074        if (sta)
1075                status.sta = &sta->sta;
1076
1077        ieee80211_tx_status_ext(hw, &status);
1078        rcu_read_unlock();
1079}
1080EXPORT_SYMBOL(ieee80211_tx_status);
1081
1082void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1083                             struct ieee80211_tx_status *status)
1084{
1085        struct ieee80211_local *local = hw_to_local(hw);
1086        struct ieee80211_tx_info *info = status->info;
1087        struct ieee80211_sta *pubsta = status->sta;
1088        struct sk_buff *skb = status->skb;
1089        struct ieee80211_supported_band *sband;
1090        struct sta_info *sta = NULL;
1091        int rates_idx, retry_count;
1092        bool acked, noack_success;
1093        u16 tx_time_est;
1094
1095        if (pubsta) {
1096                sta = container_of(pubsta, struct sta_info, sta);
1097
1098                if (status->rate)
1099                        sta->tx_stats.last_rate_info = *status->rate;
1100        }
1101
1102        if (skb && (tx_time_est =
1103                    ieee80211_info_get_tx_time_est(IEEE80211_SKB_CB(skb))) > 0) {
1104                /* Do this here to avoid the expensive lookup of the sta
1105                 * in ieee80211_report_used_skb().
1106                 */
1107                ieee80211_sta_update_pending_airtime(local, sta,
1108                                                     skb_get_queue_mapping(skb),
1109                                                     tx_time_est,
1110                                                     true);
1111                ieee80211_info_set_tx_time_est(IEEE80211_SKB_CB(skb), 0);
1112        }
1113
1114        if (!status->info)
1115                goto free;
1116
1117        rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
1118
1119        sband = hw->wiphy->bands[info->band];
1120
1121        acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1122        noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1123
1124        if (pubsta) {
1125                struct ieee80211_sub_if_data *sdata = sta->sdata;
1126
1127                if (!acked && !noack_success)
1128                        sta->status_stats.retry_failed++;
1129                sta->status_stats.retry_count += retry_count;
1130
1131                if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
1132                        if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1133                            skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1134                                ieee80211_sta_tx_notify(sdata, (void *) skb->data,
1135                                                        acked, info->status.tx_time);
1136
1137                        if (acked) {
1138                                sta->status_stats.last_ack = jiffies;
1139
1140                                if (sta->status_stats.lost_packets)
1141                                        sta->status_stats.lost_packets = 0;
1142
1143                                /* Track when last packet was ACKed */
1144                                sta->status_stats.last_pkt_time = jiffies;
1145
1146                                /* Reset connection monitor */
1147                                if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1148                                    unlikely(sdata->u.mgd.probe_send_count > 0))
1149                                        sdata->u.mgd.probe_send_count = 0;
1150
1151                                if (info->status.is_valid_ack_signal) {
1152                                        sta->status_stats.last_ack_signal =
1153                                                         (s8)info->status.ack_signal;
1154                                        sta->status_stats.ack_signal_filled = true;
1155                                        ewma_avg_signal_add(&sta->status_stats.avg_ack_signal,
1156                                                            -info->status.ack_signal);
1157                                }
1158                        } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1159                                /*
1160                                 * The STA is in power save mode, so assume
1161                                 * that this TX packet failed because of that.
1162                                 */
1163                                if (skb)
1164                                        ieee80211_handle_filtered_frame(local, sta, skb);
1165                                return;
1166                        } else if (noack_success) {
1167                                /* nothing to do here, do not account as lost */
1168                        } else {
1169                                ieee80211_lost_packet(sta, info);
1170                        }
1171                }
1172
1173                rate_control_tx_status(local, sband, status);
1174                if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1175                        ieee80211s_update_metric(local, sta, status);
1176        }
1177
1178        if (skb && !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP))
1179                return __ieee80211_tx_status(hw, status, rates_idx,
1180                                             retry_count);
1181
1182        if (acked || noack_success) {
1183                I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1184                if (!pubsta)
1185                        I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1186                if (retry_count > 0)
1187                        I802_DEBUG_INC(local->dot11RetryCount);
1188                if (retry_count > 1)
1189                        I802_DEBUG_INC(local->dot11MultipleRetryCount);
1190        } else {
1191                I802_DEBUG_INC(local->dot11FailedCount);
1192        }
1193
1194free:
1195        if (!skb)
1196                return;
1197
1198        ieee80211_report_used_skb(local, skb, false);
1199        if (status->free_list)
1200                list_add_tail(&skb->list, status->free_list);
1201        else
1202                dev_kfree_skb(skb);
1203}
1204EXPORT_SYMBOL(ieee80211_tx_status_ext);
1205
1206void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1207                              struct ieee80211_sta *pubsta,
1208                              struct ieee80211_tx_info *info)
1209{
1210        struct ieee80211_local *local = hw_to_local(hw);
1211        struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1212        struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1213        struct ieee80211_tx_status status = {
1214                .info = info,
1215                .sta = pubsta,
1216        };
1217
1218        rate_control_tx_status(local, sband, &status);
1219
1220        if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1221                sta->tx_stats.last_rate = info->status.rates[0];
1222}
1223EXPORT_SYMBOL(ieee80211_tx_rate_update);
1224
1225void ieee80211_tx_status_8023(struct ieee80211_hw *hw,
1226                              struct ieee80211_vif *vif,
1227                              struct sk_buff *skb)
1228{
1229        struct ieee80211_sub_if_data *sdata;
1230        struct ieee80211_tx_status status = {
1231                .skb = skb,
1232                .info = IEEE80211_SKB_CB(skb),
1233        };
1234        struct sta_info *sta;
1235
1236        sdata = vif_to_sdata(vif);
1237
1238        rcu_read_lock();
1239
1240        if (!ieee80211_lookup_ra_sta(sdata, skb, &sta) && !IS_ERR(sta))
1241                status.sta = &sta->sta;
1242
1243        ieee80211_tx_status_ext(hw, &status);
1244
1245        rcu_read_unlock();
1246}
1247EXPORT_SYMBOL(ieee80211_tx_status_8023);
1248
1249void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1250{
1251        struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1252        cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1253                                    num_packets, GFP_ATOMIC);
1254}
1255EXPORT_SYMBOL(ieee80211_report_low_ack);
1256
1257void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1258{
1259        struct ieee80211_local *local = hw_to_local(hw);
1260
1261        ieee80211_report_used_skb(local, skb, true);
1262        dev_kfree_skb_any(skb);
1263}
1264EXPORT_SYMBOL(ieee80211_free_txskb);
1265
1266void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1267                              struct sk_buff_head *skbs)
1268{
1269        struct sk_buff *skb;
1270
1271        while ((skb = __skb_dequeue(skbs)))
1272                ieee80211_free_txskb(hw, skb);
1273}
1274