1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> 4 */ 5 #include <linux/of.h> 6 #include "mt76.h" 7 8 #define CHAN2G(_idx, _freq) { \ 9 .band = NL80211_BAND_2GHZ, \ 10 .center_freq = (_freq), \ 11 .hw_value = (_idx), \ 12 .max_power = 30, \ 13 } 14 15 #define CHAN5G(_idx, _freq) { \ 16 .band = NL80211_BAND_5GHZ, \ 17 .center_freq = (_freq), \ 18 .hw_value = (_idx), \ 19 .max_power = 30, \ 20 } 21 22 static const struct ieee80211_channel mt76_channels_2ghz[] = { 23 CHAN2G(1, 2412), 24 CHAN2G(2, 2417), 25 CHAN2G(3, 2422), 26 CHAN2G(4, 2427), 27 CHAN2G(5, 2432), 28 CHAN2G(6, 2437), 29 CHAN2G(7, 2442), 30 CHAN2G(8, 2447), 31 CHAN2G(9, 2452), 32 CHAN2G(10, 2457), 33 CHAN2G(11, 2462), 34 CHAN2G(12, 2467), 35 CHAN2G(13, 2472), 36 CHAN2G(14, 2484), 37 }; 38 39 static const struct ieee80211_channel mt76_channels_5ghz[] = { 40 CHAN5G(36, 5180), 41 CHAN5G(40, 5200), 42 CHAN5G(44, 5220), 43 CHAN5G(48, 5240), 44 45 CHAN5G(52, 5260), 46 CHAN5G(56, 5280), 47 CHAN5G(60, 5300), 48 CHAN5G(64, 5320), 49 50 CHAN5G(100, 5500), 51 CHAN5G(104, 5520), 52 CHAN5G(108, 5540), 53 CHAN5G(112, 5560), 54 CHAN5G(116, 5580), 55 CHAN5G(120, 5600), 56 CHAN5G(124, 5620), 57 CHAN5G(128, 5640), 58 CHAN5G(132, 5660), 59 CHAN5G(136, 5680), 60 CHAN5G(140, 5700), 61 62 CHAN5G(149, 5745), 63 CHAN5G(153, 5765), 64 CHAN5G(157, 5785), 65 CHAN5G(161, 5805), 66 CHAN5G(165, 5825), 67 }; 68 69 static const struct ieee80211_tpt_blink mt76_tpt_blink[] = { 70 { .throughput = 0 * 1024, .blink_time = 334 }, 71 { .throughput = 1 * 1024, .blink_time = 260 }, 72 { .throughput = 5 * 1024, .blink_time = 220 }, 73 { .throughput = 10 * 1024, .blink_time = 190 }, 74 { .throughput = 20 * 1024, .blink_time = 170 }, 75 { .throughput = 50 * 1024, .blink_time = 150 }, 76 { .throughput = 70 * 1024, .blink_time = 130 }, 77 { .throughput = 100 * 1024, .blink_time = 110 }, 78 { .throughput = 200 * 1024, .blink_time = 80 }, 79 { .throughput = 300 * 1024, .blink_time = 50 }, 80 }; 81 82 static int mt76_led_init(struct mt76_dev *dev) 83 { 84 struct device_node *np = dev->dev->of_node; 85 struct ieee80211_hw *hw = dev->hw; 86 int led_pin; 87 88 if (!dev->led_cdev.brightness_set && !dev->led_cdev.blink_set) 89 return 0; 90 91 snprintf(dev->led_name, sizeof(dev->led_name), 92 "mt76-%s", wiphy_name(hw->wiphy)); 93 94 dev->led_cdev.name = dev->led_name; 95 dev->led_cdev.default_trigger = 96 ieee80211_create_tpt_led_trigger(hw, 97 IEEE80211_TPT_LEDTRIG_FL_RADIO, 98 mt76_tpt_blink, 99 ARRAY_SIZE(mt76_tpt_blink)); 100 101 np = of_get_child_by_name(np, "led"); 102 if (np) { 103 if (!of_property_read_u32(np, "led-sources", &led_pin)) 104 dev->led_pin = led_pin; 105 dev->led_al = of_property_read_bool(np, "led-active-low"); 106 } 107 108 return devm_led_classdev_register(dev->dev, &dev->led_cdev); 109 } 110 111 static void mt76_init_stream_cap(struct mt76_dev *dev, 112 struct ieee80211_supported_band *sband, 113 bool vht) 114 { 115 struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap; 116 int i, nstream = hweight8(dev->antenna_mask); 117 struct ieee80211_sta_vht_cap *vht_cap; 118 u16 mcs_map = 0; 119 120 if (nstream > 1) 121 ht_cap->cap |= IEEE80211_HT_CAP_TX_STBC; 122 else 123 ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC; 124 125 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 126 ht_cap->mcs.rx_mask[i] = i < nstream ? 0xff : 0; 127 128 if (!vht) 129 return; 130 131 vht_cap = &sband->vht_cap; 132 if (nstream > 1) 133 vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC; 134 else 135 vht_cap->cap &= ~IEEE80211_VHT_CAP_TXSTBC; 136 137 for (i = 0; i < 8; i++) { 138 if (i < nstream) 139 mcs_map |= (IEEE80211_VHT_MCS_SUPPORT_0_9 << (i * 2)); 140 else 141 mcs_map |= 142 (IEEE80211_VHT_MCS_NOT_SUPPORTED << (i * 2)); 143 } 144 vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map); 145 vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map); 146 } 147 148 void mt76_set_stream_caps(struct mt76_dev *dev, bool vht) 149 { 150 if (dev->cap.has_2ghz) 151 mt76_init_stream_cap(dev, &dev->sband_2g.sband, false); 152 if (dev->cap.has_5ghz) 153 mt76_init_stream_cap(dev, &dev->sband_5g.sband, vht); 154 } 155 EXPORT_SYMBOL_GPL(mt76_set_stream_caps); 156 157 static int 158 mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband, 159 const struct ieee80211_channel *chan, int n_chan, 160 struct ieee80211_rate *rates, int n_rates, bool vht) 161 { 162 struct ieee80211_supported_band *sband = &msband->sband; 163 struct ieee80211_sta_ht_cap *ht_cap; 164 struct ieee80211_sta_vht_cap *vht_cap; 165 void *chanlist; 166 int size; 167 168 size = n_chan * sizeof(*chan); 169 chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL); 170 if (!chanlist) 171 return -ENOMEM; 172 173 msband->chan = devm_kcalloc(dev->dev, n_chan, sizeof(*msband->chan), 174 GFP_KERNEL); 175 if (!msband->chan) 176 return -ENOMEM; 177 178 sband->channels = chanlist; 179 sband->n_channels = n_chan; 180 sband->bitrates = rates; 181 sband->n_bitrates = n_rates; 182 dev->chandef.chan = &sband->channels[0]; 183 184 ht_cap = &sband->ht_cap; 185 ht_cap->ht_supported = true; 186 ht_cap->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 187 IEEE80211_HT_CAP_GRN_FLD | 188 IEEE80211_HT_CAP_SGI_20 | 189 IEEE80211_HT_CAP_SGI_40 | 190 (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT); 191 192 ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; 193 ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K; 194 ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4; 195 196 mt76_init_stream_cap(dev, sband, vht); 197 198 if (!vht) 199 return 0; 200 201 vht_cap = &sband->vht_cap; 202 vht_cap->vht_supported = true; 203 vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC | 204 IEEE80211_VHT_CAP_RXSTBC_1 | 205 IEEE80211_VHT_CAP_SHORT_GI_80 | 206 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 207 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 208 (3 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT); 209 210 return 0; 211 } 212 213 static int 214 mt76_init_sband_2g(struct mt76_dev *dev, struct ieee80211_rate *rates, 215 int n_rates) 216 { 217 dev->hw->wiphy->bands[NL80211_BAND_2GHZ] = &dev->sband_2g.sband; 218 219 return mt76_init_sband(dev, &dev->sband_2g, 220 mt76_channels_2ghz, 221 ARRAY_SIZE(mt76_channels_2ghz), 222 rates, n_rates, false); 223 } 224 225 static int 226 mt76_init_sband_5g(struct mt76_dev *dev, struct ieee80211_rate *rates, 227 int n_rates, bool vht) 228 { 229 dev->hw->wiphy->bands[NL80211_BAND_5GHZ] = &dev->sband_5g.sband; 230 231 return mt76_init_sband(dev, &dev->sband_5g, 232 mt76_channels_5ghz, 233 ARRAY_SIZE(mt76_channels_5ghz), 234 rates, n_rates, vht); 235 } 236 237 static void 238 mt76_check_sband(struct mt76_dev *dev, int band) 239 { 240 struct ieee80211_supported_band *sband = dev->hw->wiphy->bands[band]; 241 bool found = false; 242 int i; 243 244 if (!sband) 245 return; 246 247 for (i = 0; i < sband->n_channels; i++) { 248 if (sband->channels[i].flags & IEEE80211_CHAN_DISABLED) 249 continue; 250 251 found = true; 252 break; 253 } 254 255 if (found) 256 return; 257 258 sband->n_channels = 0; 259 dev->hw->wiphy->bands[band] = NULL; 260 } 261 262 struct mt76_dev * 263 mt76_alloc_device(struct device *pdev, unsigned int size, 264 const struct ieee80211_ops *ops, 265 const struct mt76_driver_ops *drv_ops) 266 { 267 struct ieee80211_hw *hw; 268 struct mt76_dev *dev; 269 270 hw = ieee80211_alloc_hw(size, ops); 271 if (!hw) 272 return NULL; 273 274 dev = hw->priv; 275 dev->hw = hw; 276 dev->dev = pdev; 277 dev->drv = drv_ops; 278 279 spin_lock_init(&dev->rx_lock); 280 spin_lock_init(&dev->lock); 281 spin_lock_init(&dev->cc_lock); 282 mutex_init(&dev->mutex); 283 init_waitqueue_head(&dev->tx_wait); 284 skb_queue_head_init(&dev->status_list); 285 286 tasklet_init(&dev->tx_tasklet, mt76_tx_tasklet, (unsigned long)dev); 287 288 return dev; 289 } 290 EXPORT_SYMBOL_GPL(mt76_alloc_device); 291 292 int mt76_register_device(struct mt76_dev *dev, bool vht, 293 struct ieee80211_rate *rates, int n_rates) 294 { 295 struct ieee80211_hw *hw = dev->hw; 296 struct wiphy *wiphy = hw->wiphy; 297 int ret; 298 299 dev_set_drvdata(dev->dev, dev); 300 301 INIT_LIST_HEAD(&dev->txwi_cache); 302 303 SET_IEEE80211_DEV(hw, dev->dev); 304 SET_IEEE80211_PERM_ADDR(hw, dev->macaddr); 305 306 wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR; 307 308 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 309 310 wiphy->available_antennas_tx = dev->antenna_mask; 311 wiphy->available_antennas_rx = dev->antenna_mask; 312 313 hw->txq_data_size = sizeof(struct mt76_txq); 314 hw->max_tx_fragments = 16; 315 316 ieee80211_hw_set(hw, SIGNAL_DBM); 317 ieee80211_hw_set(hw, PS_NULLFUNC_STACK); 318 ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING); 319 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 320 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE); 321 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 322 ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS); 323 ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU); 324 ieee80211_hw_set(hw, TX_AMSDU); 325 ieee80211_hw_set(hw, TX_FRAG_LIST); 326 ieee80211_hw_set(hw, MFP_CAPABLE); 327 ieee80211_hw_set(hw, AP_LINK_PS); 328 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 329 ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR); 330 331 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 332 333 if (dev->cap.has_2ghz) { 334 ret = mt76_init_sband_2g(dev, rates, n_rates); 335 if (ret) 336 return ret; 337 } 338 339 if (dev->cap.has_5ghz) { 340 ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht); 341 if (ret) 342 return ret; 343 } 344 345 wiphy_read_of_freq_limits(dev->hw->wiphy); 346 mt76_check_sband(dev, NL80211_BAND_2GHZ); 347 mt76_check_sband(dev, NL80211_BAND_5GHZ); 348 349 if (IS_ENABLED(CONFIG_MT76_LEDS)) { 350 ret = mt76_led_init(dev); 351 if (ret) 352 return ret; 353 } 354 355 return ieee80211_register_hw(hw); 356 } 357 EXPORT_SYMBOL_GPL(mt76_register_device); 358 359 void mt76_unregister_device(struct mt76_dev *dev) 360 { 361 struct ieee80211_hw *hw = dev->hw; 362 363 mt76_tx_status_check(dev, NULL, true); 364 ieee80211_unregister_hw(hw); 365 } 366 EXPORT_SYMBOL_GPL(mt76_unregister_device); 367 368 void mt76_free_device(struct mt76_dev *dev) 369 { 370 mt76_tx_free(dev); 371 ieee80211_free_hw(dev->hw); 372 } 373 EXPORT_SYMBOL_GPL(mt76_free_device); 374 375 void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb) 376 { 377 if (!test_bit(MT76_STATE_RUNNING, &dev->state)) { 378 dev_kfree_skb(skb); 379 return; 380 } 381 382 __skb_queue_tail(&dev->rx_skb[q], skb); 383 } 384 EXPORT_SYMBOL_GPL(mt76_rx); 385 386 bool mt76_has_tx_pending(struct mt76_dev *dev) 387 { 388 struct mt76_queue *q; 389 int i; 390 391 for (i = 0; i < ARRAY_SIZE(dev->q_tx); i++) { 392 q = dev->q_tx[i].q; 393 if (q && q->queued) 394 return true; 395 } 396 397 return false; 398 } 399 EXPORT_SYMBOL_GPL(mt76_has_tx_pending); 400 401 void mt76_set_channel(struct mt76_dev *dev) 402 { 403 struct ieee80211_hw *hw = dev->hw; 404 struct cfg80211_chan_def *chandef = &hw->conf.chandef; 405 struct mt76_channel_state *state; 406 bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL; 407 int timeout = HZ / 5; 408 409 if (offchannel) 410 set_bit(MT76_OFFCHANNEL, &dev->state); 411 else 412 clear_bit(MT76_OFFCHANNEL, &dev->state); 413 414 wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(dev), timeout); 415 416 if (dev->drv->update_survey) 417 dev->drv->update_survey(dev); 418 419 dev->chandef = *chandef; 420 421 if (!offchannel) 422 dev->main_chan = chandef->chan; 423 424 if (chandef->chan != dev->main_chan) { 425 state = mt76_channel_state(dev, chandef->chan); 426 memset(state, 0, sizeof(*state)); 427 } 428 } 429 EXPORT_SYMBOL_GPL(mt76_set_channel); 430 431 int mt76_get_survey(struct ieee80211_hw *hw, int idx, 432 struct survey_info *survey) 433 { 434 struct mt76_dev *dev = hw->priv; 435 struct mt76_sband *sband; 436 struct ieee80211_channel *chan; 437 struct mt76_channel_state *state; 438 int ret = 0; 439 440 if (idx == 0 && dev->drv->update_survey) 441 dev->drv->update_survey(dev); 442 443 sband = &dev->sband_2g; 444 if (idx >= sband->sband.n_channels) { 445 idx -= sband->sband.n_channels; 446 sband = &dev->sband_5g; 447 } 448 449 if (idx >= sband->sband.n_channels) 450 return -ENOENT; 451 452 chan = &sband->sband.channels[idx]; 453 state = mt76_channel_state(dev, chan); 454 455 memset(survey, 0, sizeof(*survey)); 456 survey->channel = chan; 457 survey->filled = SURVEY_INFO_TIME | SURVEY_INFO_TIME_BUSY; 458 if (chan == dev->main_chan) 459 survey->filled |= SURVEY_INFO_IN_USE; 460 461 spin_lock_bh(&dev->cc_lock); 462 survey->time = div_u64(state->cc_active, 1000); 463 survey->time_busy = div_u64(state->cc_busy, 1000); 464 spin_unlock_bh(&dev->cc_lock); 465 466 return ret; 467 } 468 EXPORT_SYMBOL_GPL(mt76_get_survey); 469 470 void mt76_wcid_key_setup(struct mt76_dev *dev, struct mt76_wcid *wcid, 471 struct ieee80211_key_conf *key) 472 { 473 struct ieee80211_key_seq seq; 474 int i; 475 476 wcid->rx_check_pn = false; 477 478 if (!key) 479 return; 480 481 if (key->cipher != WLAN_CIPHER_SUITE_CCMP) 482 return; 483 484 wcid->rx_check_pn = true; 485 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 486 ieee80211_get_key_rx_seq(key, i, &seq); 487 memcpy(wcid->rx_key_pn[i], seq.ccmp.pn, sizeof(seq.ccmp.pn)); 488 } 489 } 490 EXPORT_SYMBOL(mt76_wcid_key_setup); 491 492 struct ieee80211_sta *mt76_rx_convert(struct sk_buff *skb) 493 { 494 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); 495 struct mt76_rx_status mstat; 496 497 mstat = *((struct mt76_rx_status *)skb->cb); 498 memset(status, 0, sizeof(*status)); 499 500 status->flag = mstat.flag; 501 status->freq = mstat.freq; 502 status->enc_flags = mstat.enc_flags; 503 status->encoding = mstat.encoding; 504 status->bw = mstat.bw; 505 status->rate_idx = mstat.rate_idx; 506 status->nss = mstat.nss; 507 status->band = mstat.band; 508 status->signal = mstat.signal; 509 status->chains = mstat.chains; 510 511 BUILD_BUG_ON(sizeof(mstat) > sizeof(skb->cb)); 512 BUILD_BUG_ON(sizeof(status->chain_signal) != 513 sizeof(mstat.chain_signal)); 514 memcpy(status->chain_signal, mstat.chain_signal, 515 sizeof(mstat.chain_signal)); 516 517 return wcid_to_sta(mstat.wcid); 518 } 519 EXPORT_SYMBOL(mt76_rx_convert); 520 521 static int 522 mt76_check_ccmp_pn(struct sk_buff *skb) 523 { 524 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; 525 struct mt76_wcid *wcid = status->wcid; 526 struct ieee80211_hdr *hdr; 527 int ret; 528 529 if (!(status->flag & RX_FLAG_DECRYPTED)) 530 return 0; 531 532 if (!wcid || !wcid->rx_check_pn) 533 return 0; 534 535 if (!(status->flag & RX_FLAG_IV_STRIPPED)) { 536 /* 537 * Validate the first fragment both here and in mac80211 538 * All further fragments will be validated by mac80211 only. 539 */ 540 hdr = (struct ieee80211_hdr *)skb->data; 541 if (ieee80211_is_frag(hdr) && 542 !ieee80211_is_first_frag(hdr->frame_control)) 543 return 0; 544 } 545 546 BUILD_BUG_ON(sizeof(status->iv) != sizeof(wcid->rx_key_pn[0])); 547 ret = memcmp(status->iv, wcid->rx_key_pn[status->tid], 548 sizeof(status->iv)); 549 if (ret <= 0) 550 return -EINVAL; /* replay */ 551 552 memcpy(wcid->rx_key_pn[status->tid], status->iv, sizeof(status->iv)); 553 554 if (status->flag & RX_FLAG_IV_STRIPPED) 555 status->flag |= RX_FLAG_PN_VALIDATED; 556 557 return 0; 558 } 559 560 static void 561 mt76_check_sta(struct mt76_dev *dev, struct sk_buff *skb) 562 { 563 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; 564 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 565 struct ieee80211_sta *sta; 566 struct mt76_wcid *wcid = status->wcid; 567 bool ps; 568 int i; 569 570 if (ieee80211_is_pspoll(hdr->frame_control) && !wcid) { 571 sta = ieee80211_find_sta_by_ifaddr(dev->hw, hdr->addr2, NULL); 572 if (sta) 573 wcid = status->wcid = (struct mt76_wcid *)sta->drv_priv; 574 } 575 576 if (!wcid || !wcid->sta) 577 return; 578 579 sta = container_of((void *)wcid, struct ieee80211_sta, drv_priv); 580 581 if (status->signal <= 0) 582 ewma_signal_add(&wcid->rssi, -status->signal); 583 584 wcid->inactive_count = 0; 585 586 if (!test_bit(MT_WCID_FLAG_CHECK_PS, &wcid->flags)) 587 return; 588 589 if (ieee80211_is_pspoll(hdr->frame_control)) { 590 ieee80211_sta_pspoll(sta); 591 return; 592 } 593 594 if (ieee80211_has_morefrags(hdr->frame_control) || 595 !(ieee80211_is_mgmt(hdr->frame_control) || 596 ieee80211_is_data(hdr->frame_control))) 597 return; 598 599 ps = ieee80211_has_pm(hdr->frame_control); 600 601 if (ps && (ieee80211_is_data_qos(hdr->frame_control) || 602 ieee80211_is_qos_nullfunc(hdr->frame_control))) 603 ieee80211_sta_uapsd_trigger(sta, status->tid); 604 605 if (!!test_bit(MT_WCID_FLAG_PS, &wcid->flags) == ps) 606 return; 607 608 if (ps) 609 set_bit(MT_WCID_FLAG_PS, &wcid->flags); 610 else 611 clear_bit(MT_WCID_FLAG_PS, &wcid->flags); 612 613 dev->drv->sta_ps(dev, sta, ps); 614 ieee80211_sta_ps_transition(sta, ps); 615 616 if (ps) 617 return; 618 619 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 620 struct mt76_txq *mtxq; 621 622 if (!sta->txq[i]) 623 continue; 624 625 mtxq = (struct mt76_txq *)sta->txq[i]->drv_priv; 626 if (!skb_queue_empty(&mtxq->retry_q)) 627 ieee80211_schedule_txq(dev->hw, sta->txq[i]); 628 } 629 } 630 631 void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames, 632 struct napi_struct *napi) 633 { 634 struct ieee80211_sta *sta; 635 struct sk_buff *skb; 636 637 spin_lock(&dev->rx_lock); 638 while ((skb = __skb_dequeue(frames)) != NULL) { 639 if (mt76_check_ccmp_pn(skb)) { 640 dev_kfree_skb(skb); 641 continue; 642 } 643 644 sta = mt76_rx_convert(skb); 645 ieee80211_rx_napi(dev->hw, sta, skb, napi); 646 } 647 spin_unlock(&dev->rx_lock); 648 } 649 650 void mt76_rx_poll_complete(struct mt76_dev *dev, enum mt76_rxq_id q, 651 struct napi_struct *napi) 652 { 653 struct sk_buff_head frames; 654 struct sk_buff *skb; 655 656 __skb_queue_head_init(&frames); 657 658 while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) { 659 mt76_check_sta(dev, skb); 660 mt76_rx_aggr_reorder(skb, &frames); 661 } 662 663 mt76_rx_complete(dev, &frames, napi); 664 } 665 EXPORT_SYMBOL_GPL(mt76_rx_poll_complete); 666 667 static int 668 mt76_sta_add(struct mt76_dev *dev, struct ieee80211_vif *vif, 669 struct ieee80211_sta *sta) 670 { 671 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv; 672 int ret; 673 int i; 674 675 mutex_lock(&dev->mutex); 676 677 ret = dev->drv->sta_add(dev, vif, sta); 678 if (ret) 679 goto out; 680 681 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 682 struct mt76_txq *mtxq; 683 684 if (!sta->txq[i]) 685 continue; 686 687 mtxq = (struct mt76_txq *)sta->txq[i]->drv_priv; 688 mtxq->wcid = wcid; 689 690 mt76_txq_init(dev, sta->txq[i]); 691 } 692 693 ewma_signal_init(&wcid->rssi); 694 rcu_assign_pointer(dev->wcid[wcid->idx], wcid); 695 696 out: 697 mutex_unlock(&dev->mutex); 698 699 return ret; 700 } 701 702 void __mt76_sta_remove(struct mt76_dev *dev, struct ieee80211_vif *vif, 703 struct ieee80211_sta *sta) 704 { 705 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv; 706 int i, idx = wcid->idx; 707 708 rcu_assign_pointer(dev->wcid[idx], NULL); 709 synchronize_rcu(); 710 711 if (dev->drv->sta_remove) 712 dev->drv->sta_remove(dev, vif, sta); 713 714 mt76_tx_status_check(dev, wcid, true); 715 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) 716 mt76_txq_remove(dev, sta->txq[i]); 717 mt76_wcid_free(dev->wcid_mask, idx); 718 } 719 EXPORT_SYMBOL_GPL(__mt76_sta_remove); 720 721 static void 722 mt76_sta_remove(struct mt76_dev *dev, struct ieee80211_vif *vif, 723 struct ieee80211_sta *sta) 724 { 725 mutex_lock(&dev->mutex); 726 __mt76_sta_remove(dev, vif, sta); 727 mutex_unlock(&dev->mutex); 728 } 729 730 int mt76_sta_state(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 731 struct ieee80211_sta *sta, 732 enum ieee80211_sta_state old_state, 733 enum ieee80211_sta_state new_state) 734 { 735 struct mt76_dev *dev = hw->priv; 736 737 if (old_state == IEEE80211_STA_NOTEXIST && 738 new_state == IEEE80211_STA_NONE) 739 return mt76_sta_add(dev, vif, sta); 740 741 if (old_state == IEEE80211_STA_AUTH && 742 new_state == IEEE80211_STA_ASSOC && 743 dev->drv->sta_assoc) 744 dev->drv->sta_assoc(dev, vif, sta); 745 746 if (old_state == IEEE80211_STA_NONE && 747 new_state == IEEE80211_STA_NOTEXIST) 748 mt76_sta_remove(dev, vif, sta); 749 750 return 0; 751 } 752 EXPORT_SYMBOL_GPL(mt76_sta_state); 753 754 int mt76_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 755 int *dbm) 756 { 757 struct mt76_dev *dev = hw->priv; 758 int n_chains = hweight8(dev->antenna_mask); 759 760 *dbm = DIV_ROUND_UP(dev->txpower_cur, 2); 761 762 /* convert from per-chain power to combined 763 * output power 764 */ 765 switch (n_chains) { 766 case 4: 767 *dbm += 6; 768 break; 769 case 3: 770 *dbm += 4; 771 break; 772 case 2: 773 *dbm += 3; 774 break; 775 default: 776 break; 777 } 778 779 return 0; 780 } 781 EXPORT_SYMBOL_GPL(mt76_get_txpower); 782 783 static void 784 __mt76_csa_finish(void *priv, u8 *mac, struct ieee80211_vif *vif) 785 { 786 if (vif->csa_active && ieee80211_csa_is_complete(vif)) 787 ieee80211_csa_finish(vif); 788 } 789 790 void mt76_csa_finish(struct mt76_dev *dev) 791 { 792 if (!dev->csa_complete) 793 return; 794 795 ieee80211_iterate_active_interfaces_atomic(dev->hw, 796 IEEE80211_IFACE_ITER_RESUME_ALL, 797 __mt76_csa_finish, dev); 798 799 dev->csa_complete = 0; 800 } 801 EXPORT_SYMBOL_GPL(mt76_csa_finish); 802 803 static void 804 __mt76_csa_check(void *priv, u8 *mac, struct ieee80211_vif *vif) 805 { 806 struct mt76_dev *dev = priv; 807 808 if (!vif->csa_active) 809 return; 810 811 dev->csa_complete |= ieee80211_csa_is_complete(vif); 812 } 813 814 void mt76_csa_check(struct mt76_dev *dev) 815 { 816 ieee80211_iterate_active_interfaces_atomic(dev->hw, 817 IEEE80211_IFACE_ITER_RESUME_ALL, 818 __mt76_csa_check, dev); 819 } 820 EXPORT_SYMBOL_GPL(mt76_csa_check); 821 822 int 823 mt76_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set) 824 { 825 return 0; 826 } 827 EXPORT_SYMBOL_GPL(mt76_set_tim); 828 829 void mt76_insert_ccmp_hdr(struct sk_buff *skb, u8 key_id) 830 { 831 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; 832 int hdr_len = ieee80211_get_hdrlen_from_skb(skb); 833 u8 *hdr, *pn = status->iv; 834 835 __skb_push(skb, 8); 836 memmove(skb->data, skb->data + 8, hdr_len); 837 hdr = skb->data + hdr_len; 838 839 hdr[0] = pn[5]; 840 hdr[1] = pn[4]; 841 hdr[2] = 0; 842 hdr[3] = 0x20 | (key_id << 6); 843 hdr[4] = pn[3]; 844 hdr[5] = pn[2]; 845 hdr[6] = pn[1]; 846 hdr[7] = pn[0]; 847 848 status->flag &= ~RX_FLAG_IV_STRIPPED; 849 } 850 EXPORT_SYMBOL_GPL(mt76_insert_ccmp_hdr); 851 852 int mt76_get_rate(struct mt76_dev *dev, 853 struct ieee80211_supported_band *sband, 854 int idx, bool cck) 855 { 856 int i, offset = 0, len = sband->n_bitrates; 857 858 if (cck) { 859 if (sband == &dev->sband_5g.sband) 860 return 0; 861 862 idx &= ~BIT(2); /* short preamble */ 863 } else if (sband == &dev->sband_2g.sband) { 864 offset = 4; 865 } 866 867 for (i = offset; i < len; i++) { 868 if ((sband->bitrates[i].hw_value & GENMASK(7, 0)) == idx) 869 return i; 870 } 871 872 return 0; 873 } 874 EXPORT_SYMBOL_GPL(mt76_get_rate); 875 876 void mt76_sw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 877 const u8 *mac) 878 { 879 struct mt76_dev *dev = hw->priv; 880 881 set_bit(MT76_SCANNING, &dev->state); 882 } 883 EXPORT_SYMBOL_GPL(mt76_sw_scan); 884 885 void mt76_sw_scan_complete(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 886 { 887 struct mt76_dev *dev = hw->priv; 888 889 clear_bit(MT76_SCANNING, &dev->state); 890 } 891 EXPORT_SYMBOL_GPL(mt76_sw_scan_complete); 892