drivers/net/wireless/mediatek/mt76/mac80211.c

   1 /*
   2  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <linux/of.h>
  17 #include "mt76.h"
  18
  19 #define CHAN2G(_idx, _freq) {                   \
  20         .band = NL80211_BAND_2GHZ,              \
  21         .center_freq = (_freq),                 \
  22         .hw_value = (_idx),                     \
  23         .max_power = 30,                        \
  24 }
  25
  26 #define CHAN5G(_idx, _freq) {                   \
  27         .band = NL80211_BAND_5GHZ,              \
  28         .center_freq = (_freq),                 \
  29         .hw_value = (_idx),                     \
  30         .max_power = 30,                        \
  31 }
  32
  33 static const struct ieee80211_channel mt76_channels_2ghz[] = {
  34         CHAN2G(1, 2412),
  35         CHAN2G(2, 2417),
  36         CHAN2G(3, 2422),
  37         CHAN2G(4, 2427),
  38         CHAN2G(5, 2432),
  39         CHAN2G(6, 2437),
  40         CHAN2G(7, 2442),
  41         CHAN2G(8, 2447),
  42         CHAN2G(9, 2452),
  43         CHAN2G(10, 2457),
  44         CHAN2G(11, 2462),
  45         CHAN2G(12, 2467),
  46         CHAN2G(13, 2472),
  47         CHAN2G(14, 2484),
  48 };
  49
  50 static const struct ieee80211_channel mt76_channels_5ghz[] = {
  51         CHAN5G(36, 5180),
  52         CHAN5G(40, 5200),
  53         CHAN5G(44, 5220),
  54         CHAN5G(48, 5240),
  55
  56         CHAN5G(52, 5260),
  57         CHAN5G(56, 5280),
  58         CHAN5G(60, 5300),
  59         CHAN5G(64, 5320),
  60
  61         CHAN5G(100, 5500),
  62         CHAN5G(104, 5520),
  63         CHAN5G(108, 5540),
  64         CHAN5G(112, 5560),
  65         CHAN5G(116, 5580),
  66         CHAN5G(120, 5600),
  67         CHAN5G(124, 5620),
  68         CHAN5G(128, 5640),
  69         CHAN5G(132, 5660),
  70         CHAN5G(136, 5680),
  71         CHAN5G(140, 5700),
  72
  73         CHAN5G(149, 5745),
  74         CHAN5G(153, 5765),
  75         CHAN5G(157, 5785),
  76         CHAN5G(161, 5805),
  77         CHAN5G(165, 5825),
  78 };
  79
  80 static const struct ieee80211_tpt_blink mt76_tpt_blink[] = {
  81         { .throughput =   0 * 1024, .blink_time = 334 },
  82         { .throughput =   1 * 1024, .blink_time = 260 },
  83         { .throughput =   5 * 1024, .blink_time = 220 },
  84         { .throughput =  10 * 1024, .blink_time = 190 },
  85         { .throughput =  20 * 1024, .blink_time = 170 },
  86         { .throughput =  50 * 1024, .blink_time = 150 },
  87         { .throughput =  70 * 1024, .blink_time = 130 },
  88         { .throughput = 100 * 1024, .blink_time = 110 },
  89         { .throughput = 200 * 1024, .blink_time =  80 },
  90         { .throughput = 300 * 1024, .blink_time =  50 },
  91 };
  92
  93 static int mt76_led_init(struct mt76_dev *dev)
  94 {
  95         struct device_node *np = dev->dev->of_node;
  96         struct ieee80211_hw *hw = dev->hw;
  97         int led_pin;
  98
  99         if (!dev->led_cdev.brightness_set && !dev->led_cdev.blink_set)
 100                 return 0;
 101
 102         snprintf(dev->led_name, sizeof(dev->led_name),
 103                  "mt76-%s", wiphy_name(hw->wiphy));
 104
 105         dev->led_cdev.name = dev->led_name;
 106         dev->led_cdev.default_trigger =
 107                 ieee80211_create_tpt_led_trigger(hw,
 108                                         IEEE80211_TPT_LEDTRIG_FL_RADIO,
 109                                         mt76_tpt_blink,
 110                                         ARRAY_SIZE(mt76_tpt_blink));
 111
 112         np = of_get_child_by_name(np, "led");
 113         if (np) {
 114                 if (!of_property_read_u32(np, "led-sources", &led_pin))
 115                         dev->led_pin = led_pin;
 116                 dev->led_al = of_property_read_bool(np, "led-active-low");
 117         }
 118
 119         return devm_led_classdev_register(dev->dev, &dev->led_cdev);
 120 }
 121
 122 static void mt76_init_stream_cap(struct mt76_dev *dev,
 123                                  struct ieee80211_supported_band *sband,
 124                                  bool vht)
 125 {
 126         struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap;
 127         int i, nstream = __sw_hweight8(dev->antenna_mask);
 128         struct ieee80211_sta_vht_cap *vht_cap;
 129         u16 mcs_map = 0;
 130
 131         if (nstream > 1)
 132                 ht_cap->cap |= IEEE80211_HT_CAP_TX_STBC;
 133         else
 134                 ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;
 135
 136         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
 137                 ht_cap->mcs.rx_mask[i] = i < nstream ? 0xff : 0;
 138
 139         if (!vht)
 140                 return;
 141
 142         vht_cap = &sband->vht_cap;
 143         if (nstream > 1)
 144                 vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC;
 145         else
 146                 vht_cap->cap &= ~IEEE80211_VHT_CAP_TXSTBC;
 147
 148         for (i = 0; i < 8; i++) {
 149                 if (i < nstream)
 150                         mcs_map |= (IEEE80211_VHT_MCS_SUPPORT_0_9 << (i * 2));
 151                 else
 152                         mcs_map |=
 153                                 (IEEE80211_VHT_MCS_NOT_SUPPORTED << (i * 2));
 154         }
 155         vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map);
 156         vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map);
 157 }
 158
 159 void mt76_set_stream_caps(struct mt76_dev *dev, bool vht)
 160 {
 161         if (dev->cap.has_2ghz)
 162                 mt76_init_stream_cap(dev, &dev->sband_2g.sband, false);
 163         if (dev->cap.has_5ghz)
 164                 mt76_init_stream_cap(dev, &dev->sband_5g.sband, vht);
 165 }
 166 EXPORT_SYMBOL_GPL(mt76_set_stream_caps);
 167
 168 static int
 169 mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband,
 170                 const struct ieee80211_channel *chan, int n_chan,
 171                 struct ieee80211_rate *rates, int n_rates, bool vht)
 172 {
 173         struct ieee80211_supported_band *sband = &msband->sband;
 174         struct ieee80211_sta_ht_cap *ht_cap;
 175         struct ieee80211_sta_vht_cap *vht_cap;
 176         void *chanlist;
 177         int size;
 178
 179         size = n_chan * sizeof(*chan);
 180         chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL);
 181         if (!chanlist)
 182                 return -ENOMEM;
 183
 184         msband->chan = devm_kcalloc(dev->dev, n_chan, sizeof(*msband->chan),
 185                                     GFP_KERNEL);
 186         if (!msband->chan)
 187                 return -ENOMEM;
 188
 189         sband->channels = chanlist;
 190         sband->n_channels = n_chan;
 191         sband->bitrates = rates;
 192         sband->n_bitrates = n_rates;
 193         dev->chandef.chan = &sband->channels[0];
 194
 195         ht_cap = &sband->ht_cap;
 196         ht_cap->ht_supported = true;
 197         ht_cap->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 198                        IEEE80211_HT_CAP_GRN_FLD |
 199                        IEEE80211_HT_CAP_SGI_20 |
 200                        IEEE80211_HT_CAP_SGI_40 |
 201                        (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
 202
 203         ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 204         ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
 205         ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
 206
 207         mt76_init_stream_cap(dev, sband, vht);
 208
 209         if (!vht)
 210                 return 0;
 211
 212         vht_cap = &sband->vht_cap;
 213         vht_cap->vht_supported = true;
 214         vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC |
 215                         IEEE80211_VHT_CAP_RXSTBC_1 |
 216                         IEEE80211_VHT_CAP_SHORT_GI_80 |
 217                         (3 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
 218
 219         return 0;
 220 }
 221
 222 static int
 223 mt76_init_sband_2g(struct mt76_dev *dev, struct ieee80211_rate *rates,
 224                    int n_rates)
 225 {
 226         dev->hw->wiphy->bands[NL80211_BAND_2GHZ] = &dev->sband_2g.sband;
 227
 228         return mt76_init_sband(dev, &dev->sband_2g,
 229                                mt76_channels_2ghz,
 230                                ARRAY_SIZE(mt76_channels_2ghz),
 231                                rates, n_rates, false);
 232 }
 233
 234 static int
 235 mt76_init_sband_5g(struct mt76_dev *dev, struct ieee80211_rate *rates,
 236                    int n_rates, bool vht)
 237 {
 238         dev->hw->wiphy->bands[NL80211_BAND_5GHZ] = &dev->sband_5g.sband;
 239
 240         return mt76_init_sband(dev, &dev->sband_5g,
 241                                mt76_channels_5ghz,
 242                                ARRAY_SIZE(mt76_channels_5ghz),
 243                                rates, n_rates, vht);
 244 }
 245
 246 static void
 247 mt76_check_sband(struct mt76_dev *dev, int band)
 248 {
 249         struct ieee80211_supported_band *sband = dev->hw->wiphy->bands[band];
 250         bool found = false;
 251         int i;
 252
 253         if (!sband)
 254                 return;
 255
 256         for (i = 0; i < sband->n_channels; i++) {
 257                 if (sband->channels[i].flags & IEEE80211_CHAN_DISABLED)
 258                         continue;
 259
 260                 found = true;
 261                 break;
 262         }
 263
 264         if (found)
 265                 return;
 266
 267         sband->n_channels = 0;
 268         dev->hw->wiphy->bands[band] = NULL;
 269 }
 270
 271 struct mt76_dev *
 272 mt76_alloc_device(unsigned int size, const struct ieee80211_ops *ops)
 273 {
 274         struct ieee80211_hw *hw;
 275         struct mt76_dev *dev;
 276
 277         hw = ieee80211_alloc_hw(size, ops);
 278         if (!hw)
 279                 return NULL;
 280
 281         dev = hw->priv;
 282         dev->hw = hw;
 283         spin_lock_init(&dev->rx_lock);
 284         spin_lock_init(&dev->lock);
 285         spin_lock_init(&dev->cc_lock);
 286         mutex_init(&dev->mutex);
 287         init_waitqueue_head(&dev->tx_wait);
 288         skb_queue_head_init(&dev->status_list);
 289
 290         return dev;
 291 }
 292 EXPORT_SYMBOL_GPL(mt76_alloc_device);
 293
 294 int mt76_register_device(struct mt76_dev *dev, bool vht,
 295                          struct ieee80211_rate *rates, int n_rates)
 296 {
 297         struct ieee80211_hw *hw = dev->hw;
 298         struct wiphy *wiphy = hw->wiphy;
 299         int ret;
 300
 301         dev_set_drvdata(dev->dev, dev);
 302
 303         INIT_LIST_HEAD(&dev->txwi_cache);
 304
 305         SET_IEEE80211_DEV(hw, dev->dev);
 306         SET_IEEE80211_PERM_ADDR(hw, dev->macaddr);
 307
 308         wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR;
 309
 310         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 311
 312         wiphy->available_antennas_tx = dev->antenna_mask;
 313         wiphy->available_antennas_rx = dev->antenna_mask;
 314
 315         hw->txq_data_size = sizeof(struct mt76_txq);
 316         hw->max_tx_fragments = 16;
 317
 318         ieee80211_hw_set(hw, SIGNAL_DBM);
 319         ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
 320         ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 321         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 322         ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
 323         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 324         ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 325         ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 326         ieee80211_hw_set(hw, TX_AMSDU);
 327         ieee80211_hw_set(hw, TX_FRAG_LIST);
 328         ieee80211_hw_set(hw, MFP_CAPABLE);
 329         ieee80211_hw_set(hw, AP_LINK_PS);
 330         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 331         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
 332
 333         wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 334
 335         if (dev->cap.has_2ghz) {
 336                 ret = mt76_init_sband_2g(dev, rates, n_rates);
 337                 if (ret)
 338                         return ret;
 339         }
 340
 341         if (dev->cap.has_5ghz) {
 342                 ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht);
 343                 if (ret)
 344                         return ret;
 345         }
 346
 347         wiphy_read_of_freq_limits(dev->hw->wiphy);
 348         mt76_check_sband(dev, NL80211_BAND_2GHZ);
 349         mt76_check_sband(dev, NL80211_BAND_5GHZ);
 350
 351         if (IS_ENABLED(CONFIG_MT76_LEDS)) {
 352                 ret = mt76_led_init(dev);
 353                 if (ret)
 354                         return ret;
 355         }
 356
 357         return ieee80211_register_hw(hw);
 358 }
 359 EXPORT_SYMBOL_GPL(mt76_register_device);
 360
 361 void mt76_unregister_device(struct mt76_dev *dev)
 362 {
 363         struct ieee80211_hw *hw = dev->hw;
 364
 365         mt76_tx_status_check(dev, NULL, true);
 366         ieee80211_unregister_hw(hw);
 367         mt76_tx_free(dev);
 368 }
 369 EXPORT_SYMBOL_GPL(mt76_unregister_device);
 370
 371 void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb)
 372 {
 373         if (!test_bit(MT76_STATE_RUNNING, &dev->state)) {
 374                 dev_kfree_skb(skb);
 375                 return;
 376         }
 377
 378         __skb_queue_tail(&dev->rx_skb[q], skb);
 379 }
 380 EXPORT_SYMBOL_GPL(mt76_rx);
 381
 382 static bool mt76_has_tx_pending(struct mt76_dev *dev)
 383 {
 384         int i;
 385
 386         for (i = 0; i < ARRAY_SIZE(dev->q_tx); i++) {
 387                 if (dev->q_tx[i].queued)
 388                         return true;
 389         }
 390
 391         return false;
 392 }
 393
 394 void mt76_set_channel(struct mt76_dev *dev)
 395 {
 396         struct ieee80211_hw *hw = dev->hw;
 397         struct cfg80211_chan_def *chandef = &hw->conf.chandef;
 398         struct mt76_channel_state *state;
 399         bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL;
 400         int timeout = HZ / 5;
 401
 402         if (offchannel)
 403                 set_bit(MT76_OFFCHANNEL, &dev->state);
 404         else
 405                 clear_bit(MT76_OFFCHANNEL, &dev->state);
 406
 407         wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(dev), timeout);
 408
 409         if (dev->drv->update_survey)
 410                 dev->drv->update_survey(dev);
 411
 412         dev->chandef = *chandef;
 413
 414         if (!offchannel)
 415                 dev->main_chan = chandef->chan;
 416
 417         if (chandef->chan != dev->main_chan) {
 418                 state = mt76_channel_state(dev, chandef->chan);
 419                 memset(state, 0, sizeof(*state));
 420         }
 421 }
 422 EXPORT_SYMBOL_GPL(mt76_set_channel);
 423
 424 int mt76_get_survey(struct ieee80211_hw *hw, int idx,
 425                     struct survey_info *survey)
 426 {
 427         struct mt76_dev *dev = hw->priv;
 428         struct mt76_sband *sband;
 429         struct ieee80211_channel *chan;
 430         struct mt76_channel_state *state;
 431         int ret = 0;
 432
 433         if (idx == 0 && dev->drv->update_survey)
 434                 dev->drv->update_survey(dev);
 435
 436         sband = &dev->sband_2g;
 437         if (idx >= sband->sband.n_channels) {
 438                 idx -= sband->sband.n_channels;
 439                 sband = &dev->sband_5g;
 440         }
 441
 442         if (idx >= sband->sband.n_channels)
 443                 return -ENOENT;
 444
 445         chan = &sband->sband.channels[idx];
 446         state = mt76_channel_state(dev, chan);
 447
 448         memset(survey, 0, sizeof(*survey));
 449         survey->channel = chan;
 450         survey->filled = SURVEY_INFO_TIME | SURVEY_INFO_TIME_BUSY;
 451         if (chan == dev->main_chan)
 452                 survey->filled |= SURVEY_INFO_IN_USE;
 453
 454         spin_lock_bh(&dev->cc_lock);
 455         survey->time = div_u64(state->cc_active, 1000);
 456         survey->time_busy = div_u64(state->cc_busy, 1000);
 457         spin_unlock_bh(&dev->cc_lock);
 458
 459         return ret;
 460 }
 461 EXPORT_SYMBOL_GPL(mt76_get_survey);
 462
 463 void mt76_wcid_key_setup(struct mt76_dev *dev, struct mt76_wcid *wcid,
 464                          struct ieee80211_key_conf *key)
 465 {
 466         struct ieee80211_key_seq seq;
 467         int i;
 468
 469         wcid->rx_check_pn = false;
 470
 471         if (!key)
 472                 return;
 473
 474         if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
 475                 wcid->rx_check_pn = true;
 476
 477         for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
 478                 ieee80211_get_key_rx_seq(key, i, &seq);
 479                 memcpy(wcid->rx_key_pn[i], seq.ccmp.pn, sizeof(seq.ccmp.pn));
 480         }
 481 }
 482 EXPORT_SYMBOL(mt76_wcid_key_setup);
 483
 484 struct ieee80211_sta *mt76_rx_convert(struct sk_buff *skb)
 485 {
 486         struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
 487         struct mt76_rx_status mstat;
 488
 489         mstat = *((struct mt76_rx_status *) skb->cb);
 490         memset(status, 0, sizeof(*status));
 491
 492         status->flag = mstat.flag;
 493         status->freq = mstat.freq;
 494         status->enc_flags = mstat.enc_flags;
 495         status->encoding = mstat.encoding;
 496         status->bw = mstat.bw;
 497         status->rate_idx = mstat.rate_idx;
 498         status->nss = mstat.nss;
 499         status->band = mstat.band;
 500         status->signal = mstat.signal;
 501         status->chains = mstat.chains;
 502
 503         BUILD_BUG_ON(sizeof(mstat) > sizeof(skb->cb));
 504         BUILD_BUG_ON(sizeof(status->chain_signal) != sizeof(mstat.chain_signal));
 505         memcpy(status->chain_signal, mstat.chain_signal, sizeof(mstat.chain_signal));
 506
 507         return wcid_to_sta(mstat.wcid);
 508 }
 509 EXPORT_SYMBOL(mt76_rx_convert);
 510
 511 static int
 512 mt76_check_ccmp_pn(struct sk_buff *skb)
 513 {
 514         struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb;
 515         struct mt76_wcid *wcid = status->wcid;
 516         struct ieee80211_hdr *hdr;
 517         int ret;
 518
 519         if (!(status->flag & RX_FLAG_DECRYPTED))
 520                 return 0;
 521
 522         if (!wcid || !wcid->rx_check_pn)
 523                 return 0;
 524
 525         if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
 526                 /*
 527                  * Validate the first fragment both here and in mac80211
 528                  * All further fragments will be validated by mac80211 only.
 529                  */
 530                 hdr = (struct ieee80211_hdr *) skb->data;
 531                 if (ieee80211_is_frag(hdr) &&
 532                     !ieee80211_is_first_frag(hdr->frame_control))
 533                         return 0;
 534         }
 535
 536         BUILD_BUG_ON(sizeof(status->iv) != sizeof(wcid->rx_key_pn[0]));
 537         ret = memcmp(status->iv, wcid->rx_key_pn[status->tid],
 538                      sizeof(status->iv));
 539         if (ret <= 0)
 540                 return -EINVAL; /* replay */
 541
 542         memcpy(wcid->rx_key_pn[status->tid], status->iv, sizeof(status->iv));
 543
 544         if (status->flag & RX_FLAG_IV_STRIPPED)
 545                 status->flag |= RX_FLAG_PN_VALIDATED;
 546
 547         return 0;
 548 }
 549
 550 static void
 551 mt76_check_sta(struct mt76_dev *dev, struct sk_buff *skb)
 552 {
 553         struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb;
 554         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 555         struct ieee80211_sta *sta;
 556         struct mt76_wcid *wcid = status->wcid;
 557         bool ps;
 558
 559         if (ieee80211_is_pspoll(hdr->frame_control) && !wcid) {
 560                 sta = ieee80211_find_sta_by_ifaddr(dev->hw, hdr->addr2, NULL);
 561                 if (sta)
 562                         wcid = status->wcid = (struct mt76_wcid *) sta->drv_priv;
 563         }
 564
 565         if (!wcid || !wcid->sta)
 566                 return;
 567
 568         sta = container_of((void *) wcid, struct ieee80211_sta, drv_priv);
 569
 570         if (status->signal <= 0)
 571                 ewma_signal_add(&wcid->rssi, -status->signal);
 572
 573         wcid->inactive_count = 0;
 574
 575         if (!test_bit(MT_WCID_FLAG_CHECK_PS, &wcid->flags))
 576                 return;
 577
 578         if (ieee80211_is_pspoll(hdr->frame_control)) {
 579                 ieee80211_sta_pspoll(sta);
 580                 return;
 581         }
 582
 583         if (ieee80211_has_morefrags(hdr->frame_control) ||
 584                 !(ieee80211_is_mgmt(hdr->frame_control) ||
 585                   ieee80211_is_data(hdr->frame_control)))
 586                 return;
 587
 588         ps = ieee80211_has_pm(hdr->frame_control);
 589
 590         if (ps && (ieee80211_is_data_qos(hdr->frame_control) ||
 591                    ieee80211_is_qos_nullfunc(hdr->frame_control)))
 592                 ieee80211_sta_uapsd_trigger(sta, status->tid);
 593
 594         if (!!test_bit(MT_WCID_FLAG_PS, &wcid->flags) == ps)
 595                 return;
 596
 597         if (ps)
 598                 set_bit(MT_WCID_FLAG_PS, &wcid->flags);
 599         else
 600                 clear_bit(MT_WCID_FLAG_PS, &wcid->flags);
 601
 602         dev->drv->sta_ps(dev, sta, ps);
 603         ieee80211_sta_ps_transition(sta, ps);
 604 }
 605
 606 void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames,
 607                       struct napi_struct *napi)
 608 {
 609         struct ieee80211_sta *sta;
 610         struct sk_buff *skb;
 611
 612         spin_lock(&dev->rx_lock);
 613         while ((skb = __skb_dequeue(frames)) != NULL) {
 614                 if (mt76_check_ccmp_pn(skb)) {
 615                         dev_kfree_skb(skb);
 616                         continue;
 617                 }
 618
 619                 sta = mt76_rx_convert(skb);
 620                 ieee80211_rx_napi(dev->hw, sta, skb, napi);
 621         }
 622         spin_unlock(&dev->rx_lock);
 623 }
 624
 625 void mt76_rx_poll_complete(struct mt76_dev *dev, enum mt76_rxq_id q,
 626                            struct napi_struct *napi)
 627 {
 628         struct sk_buff_head frames;
 629         struct sk_buff *skb;
 630
 631         __skb_queue_head_init(&frames);
 632
 633         while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) {
 634                 mt76_check_sta(dev, skb);
 635                 mt76_rx_aggr_reorder(skb, &frames);
 636         }
 637
 638         mt76_rx_complete(dev, &frames, napi);
 639 }
 640 EXPORT_SYMBOL_GPL(mt76_rx_poll_complete);
 641
 642 static int
 643 mt76_sta_add(struct mt76_dev *dev, struct ieee80211_vif *vif,
 644              struct ieee80211_sta *sta)
 645 {
 646         struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
 647         int ret;
 648         int i;
 649
 650         mutex_lock(&dev->mutex);
 651
 652         ret = dev->drv->sta_add(dev, vif, sta);
 653         if (ret)
 654                 goto out;
 655
 656         for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
 657                 struct mt76_txq *mtxq;
 658
 659                 if (!sta->txq[i])
 660                         continue;
 661
 662                 mtxq = (struct mt76_txq *)sta->txq[i]->drv_priv;
 663                 mtxq->wcid = wcid;
 664
 665                 mt76_txq_init(dev, sta->txq[i]);
 666         }
 667
 668         ewma_signal_init(&wcid->rssi);
 669         rcu_assign_pointer(dev->wcid[wcid->idx], wcid);
 670
 671 out:
 672         mutex_unlock(&dev->mutex);
 673
 674         return ret;
 675 }
 676
 677 static void
 678 mt76_sta_remove(struct mt76_dev *dev, struct ieee80211_vif *vif,
 679                 struct ieee80211_sta *sta)
 680 {
 681         struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
 682         int idx = wcid->idx;
 683         int i;
 684
 685         rcu_assign_pointer(dev->wcid[idx], NULL);
 686         synchronize_rcu();
 687
 688         mutex_lock(&dev->mutex);
 689
 690         if (dev->drv->sta_remove)
 691                 dev->drv->sta_remove(dev, vif, sta);
 692
 693         mt76_tx_status_check(dev, wcid, true);
 694         for (i = 0; i < ARRAY_SIZE(sta->txq); i++)
 695                 mt76_txq_remove(dev, sta->txq[i]);
 696         mt76_wcid_free(dev->wcid_mask, idx);
 697
 698         mutex_unlock(&dev->mutex);
 699 }
 700
 701 int mt76_sta_state(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 702                    struct ieee80211_sta *sta,
 703                    enum ieee80211_sta_state old_state,
 704                    enum ieee80211_sta_state new_state)
 705 {
 706         struct mt76_dev *dev = hw->priv;
 707
 708         if (old_state == IEEE80211_STA_NOTEXIST &&
 709             new_state == IEEE80211_STA_NONE)
 710                 return mt76_sta_add(dev, vif, sta);
 711
 712         if (old_state == IEEE80211_STA_NONE &&
 713                  new_state == IEEE80211_STA_NOTEXIST)
 714                 mt76_sta_remove(dev, vif, sta);
 715
 716         return 0;
 717 }
 718 EXPORT_SYMBOL_GPL(mt76_sta_state);
 719
 720 int mt76_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 721                      int *dbm)
 722 {
 723         struct mt76_dev *dev = hw->priv;
 724         int n_chains = __sw_hweight8(dev->antenna_mask);
 725
 726         *dbm = dev->txpower_cur / 2;
 727
 728         /* convert from per-chain power to combined
 729          * output on 2x2 devices
 730          */
 731         if (n_chains > 1)
 732                 *dbm += 3;
 733
 734         return 0;
 735 }
 736 EXPORT_SYMBOL_GPL(mt76_get_txpower);
 737
 738 static void
 739 __mt76_csa_finish(void *priv, u8 *mac, struct ieee80211_vif *vif)
 740 {
 741         if (vif->csa_active && ieee80211_csa_is_complete(vif))
 742             ieee80211_csa_finish(vif);
 743 }
 744
 745 void mt76_csa_finish(struct mt76_dev *dev)
 746 {
 747         if (!dev->csa_complete)
 748                 return;
 749
 750         ieee80211_iterate_active_interfaces_atomic(dev->hw,
 751                 IEEE80211_IFACE_ITER_RESUME_ALL,
 752                 __mt76_csa_finish, dev);
 753
 754         dev->csa_complete = 0;
 755 }
 756 EXPORT_SYMBOL_GPL(mt76_csa_finish);
 757
 758 static void
 759 __mt76_csa_check(void *priv, u8 *mac, struct ieee80211_vif *vif)
 760 {
 761         struct mt76_dev *dev = priv;
 762
 763         if (!vif->csa_active)
 764                 return;
 765
 766         dev->csa_complete |= ieee80211_csa_is_complete(vif);
 767 }
 768
 769 void mt76_csa_check(struct mt76_dev *dev)
 770 {
 771         ieee80211_iterate_active_interfaces_atomic(dev->hw,
 772                 IEEE80211_IFACE_ITER_RESUME_ALL,
 773                 __mt76_csa_check, dev);
 774 }
 775 EXPORT_SYMBOL_GPL(mt76_csa_check);