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 = 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(struct device *pdev, unsigned int size, 273 const struct ieee80211_ops *ops, 274 const struct mt76_driver_ops *drv_ops) 275 { 276 struct ieee80211_hw *hw; 277 struct mt76_dev *dev; 278 279 hw = ieee80211_alloc_hw(size, ops); 280 if (!hw) 281 return NULL; 282 283 dev = hw->priv; 284 dev->hw = hw; 285 dev->dev = pdev; 286 dev->drv = drv_ops; 287 288 spin_lock_init(&dev->rx_lock); 289 spin_lock_init(&dev->lock); 290 spin_lock_init(&dev->cc_lock); 291 mutex_init(&dev->mutex); 292 init_waitqueue_head(&dev->tx_wait); 293 skb_queue_head_init(&dev->status_list); 294 295 return dev; 296 } 297 EXPORT_SYMBOL_GPL(mt76_alloc_device); 298 299 int mt76_register_device(struct mt76_dev *dev, bool vht, 300 struct ieee80211_rate *rates, int n_rates) 301 { 302 struct ieee80211_hw *hw = dev->hw; 303 struct wiphy *wiphy = hw->wiphy; 304 int ret; 305 306 dev_set_drvdata(dev->dev, dev); 307 308 INIT_LIST_HEAD(&dev->txwi_cache); 309 310 SET_IEEE80211_DEV(hw, dev->dev); 311 SET_IEEE80211_PERM_ADDR(hw, dev->macaddr); 312 313 wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR; 314 315 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 316 317 wiphy->available_antennas_tx = dev->antenna_mask; 318 wiphy->available_antennas_rx = dev->antenna_mask; 319 320 hw->txq_data_size = sizeof(struct mt76_txq); 321 hw->max_tx_fragments = 16; 322 323 ieee80211_hw_set(hw, SIGNAL_DBM); 324 ieee80211_hw_set(hw, PS_NULLFUNC_STACK); 325 ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING); 326 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 327 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE); 328 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 329 ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS); 330 ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU); 331 ieee80211_hw_set(hw, TX_AMSDU); 332 ieee80211_hw_set(hw, TX_FRAG_LIST); 333 ieee80211_hw_set(hw, MFP_CAPABLE); 334 ieee80211_hw_set(hw, AP_LINK_PS); 335 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 336 ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR); 337 338 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 339 340 if (dev->cap.has_2ghz) { 341 ret = mt76_init_sband_2g(dev, rates, n_rates); 342 if (ret) 343 return ret; 344 } 345 346 if (dev->cap.has_5ghz) { 347 ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht); 348 if (ret) 349 return ret; 350 } 351 352 wiphy_read_of_freq_limits(dev->hw->wiphy); 353 mt76_check_sband(dev, NL80211_BAND_2GHZ); 354 mt76_check_sband(dev, NL80211_BAND_5GHZ); 355 356 if (IS_ENABLED(CONFIG_MT76_LEDS)) { 357 ret = mt76_led_init(dev); 358 if (ret) 359 return ret; 360 } 361 362 return ieee80211_register_hw(hw); 363 } 364 EXPORT_SYMBOL_GPL(mt76_register_device); 365 366 void mt76_unregister_device(struct mt76_dev *dev) 367 { 368 struct ieee80211_hw *hw = dev->hw; 369 370 mt76_tx_status_check(dev, NULL, true); 371 ieee80211_unregister_hw(hw); 372 mt76_tx_free(dev); 373 } 374 EXPORT_SYMBOL_GPL(mt76_unregister_device); 375 376 void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb) 377 { 378 if (!test_bit(MT76_STATE_RUNNING, &dev->state)) { 379 dev_kfree_skb(skb); 380 return; 381 } 382 383 __skb_queue_tail(&dev->rx_skb[q], skb); 384 } 385 EXPORT_SYMBOL_GPL(mt76_rx); 386 387 static bool mt76_has_tx_pending(struct mt76_dev *dev) 388 { 389 int i; 390 391 for (i = 0; i < ARRAY_SIZE(dev->q_tx); i++) { 392 if (dev->q_tx[i].queued) 393 return true; 394 } 395 396 return false; 397 } 398 399 void mt76_set_channel(struct mt76_dev *dev) 400 { 401 struct ieee80211_hw *hw = dev->hw; 402 struct cfg80211_chan_def *chandef = &hw->conf.chandef; 403 struct mt76_channel_state *state; 404 bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL; 405 int timeout = HZ / 5; 406 407 if (offchannel) 408 set_bit(MT76_OFFCHANNEL, &dev->state); 409 else 410 clear_bit(MT76_OFFCHANNEL, &dev->state); 411 412 wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(dev), timeout); 413 414 if (dev->drv->update_survey) 415 dev->drv->update_survey(dev); 416 417 dev->chandef = *chandef; 418 419 if (!offchannel) 420 dev->main_chan = chandef->chan; 421 422 if (chandef->chan != dev->main_chan) { 423 state = mt76_channel_state(dev, chandef->chan); 424 memset(state, 0, sizeof(*state)); 425 } 426 } 427 EXPORT_SYMBOL_GPL(mt76_set_channel); 428 429 int mt76_get_survey(struct ieee80211_hw *hw, int idx, 430 struct survey_info *survey) 431 { 432 struct mt76_dev *dev = hw->priv; 433 struct mt76_sband *sband; 434 struct ieee80211_channel *chan; 435 struct mt76_channel_state *state; 436 int ret = 0; 437 438 if (idx == 0 && dev->drv->update_survey) 439 dev->drv->update_survey(dev); 440 441 sband = &dev->sband_2g; 442 if (idx >= sband->sband.n_channels) { 443 idx -= sband->sband.n_channels; 444 sband = &dev->sband_5g; 445 } 446 447 if (idx >= sband->sband.n_channels) 448 return -ENOENT; 449 450 chan = &sband->sband.channels[idx]; 451 state = mt76_channel_state(dev, chan); 452 453 memset(survey, 0, sizeof(*survey)); 454 survey->channel = chan; 455 survey->filled = SURVEY_INFO_TIME | SURVEY_INFO_TIME_BUSY; 456 if (chan == dev->main_chan) 457 survey->filled |= SURVEY_INFO_IN_USE; 458 459 spin_lock_bh(&dev->cc_lock); 460 survey->time = div_u64(state->cc_active, 1000); 461 survey->time_busy = div_u64(state->cc_busy, 1000); 462 spin_unlock_bh(&dev->cc_lock); 463 464 return ret; 465 } 466 EXPORT_SYMBOL_GPL(mt76_get_survey); 467 468 void mt76_wcid_key_setup(struct mt76_dev *dev, struct mt76_wcid *wcid, 469 struct ieee80211_key_conf *key) 470 { 471 struct ieee80211_key_seq seq; 472 int i; 473 474 wcid->rx_check_pn = false; 475 476 if (!key) 477 return; 478 479 if (key->cipher == WLAN_CIPHER_SUITE_CCMP) 480 wcid->rx_check_pn = true; 481 482 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 483 ieee80211_get_key_rx_seq(key, i, &seq); 484 memcpy(wcid->rx_key_pn[i], seq.ccmp.pn, sizeof(seq.ccmp.pn)); 485 } 486 } 487 EXPORT_SYMBOL(mt76_wcid_key_setup); 488 489 struct ieee80211_sta *mt76_rx_convert(struct sk_buff *skb) 490 { 491 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); 492 struct mt76_rx_status mstat; 493 494 mstat = *((struct mt76_rx_status *) skb->cb); 495 memset(status, 0, sizeof(*status)); 496 497 status->flag = mstat.flag; 498 status->freq = mstat.freq; 499 status->enc_flags = mstat.enc_flags; 500 status->encoding = mstat.encoding; 501 status->bw = mstat.bw; 502 status->rate_idx = mstat.rate_idx; 503 status->nss = mstat.nss; 504 status->band = mstat.band; 505 status->signal = mstat.signal; 506 status->chains = mstat.chains; 507 508 BUILD_BUG_ON(sizeof(mstat) > sizeof(skb->cb)); 509 BUILD_BUG_ON(sizeof(status->chain_signal) != sizeof(mstat.chain_signal)); 510 memcpy(status->chain_signal, mstat.chain_signal, sizeof(mstat.chain_signal)); 511 512 return wcid_to_sta(mstat.wcid); 513 } 514 EXPORT_SYMBOL(mt76_rx_convert); 515 516 static int 517 mt76_check_ccmp_pn(struct sk_buff *skb) 518 { 519 struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb; 520 struct mt76_wcid *wcid = status->wcid; 521 struct ieee80211_hdr *hdr; 522 int ret; 523 524 if (!(status->flag & RX_FLAG_DECRYPTED)) 525 return 0; 526 527 if (!wcid || !wcid->rx_check_pn) 528 return 0; 529 530 if (!(status->flag & RX_FLAG_IV_STRIPPED)) { 531 /* 532 * Validate the first fragment both here and in mac80211 533 * All further fragments will be validated by mac80211 only. 534 */ 535 hdr = (struct ieee80211_hdr *) skb->data; 536 if (ieee80211_is_frag(hdr) && 537 !ieee80211_is_first_frag(hdr->frame_control)) 538 return 0; 539 } 540 541 BUILD_BUG_ON(sizeof(status->iv) != sizeof(wcid->rx_key_pn[0])); 542 ret = memcmp(status->iv, wcid->rx_key_pn[status->tid], 543 sizeof(status->iv)); 544 if (ret <= 0) 545 return -EINVAL; /* replay */ 546 547 memcpy(wcid->rx_key_pn[status->tid], status->iv, sizeof(status->iv)); 548 549 if (status->flag & RX_FLAG_IV_STRIPPED) 550 status->flag |= RX_FLAG_PN_VALIDATED; 551 552 return 0; 553 } 554 555 static void 556 mt76_check_sta(struct mt76_dev *dev, struct sk_buff *skb) 557 { 558 struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb; 559 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 560 struct ieee80211_sta *sta; 561 struct mt76_wcid *wcid = status->wcid; 562 bool ps; 563 564 if (ieee80211_is_pspoll(hdr->frame_control) && !wcid) { 565 sta = ieee80211_find_sta_by_ifaddr(dev->hw, hdr->addr2, NULL); 566 if (sta) 567 wcid = status->wcid = (struct mt76_wcid *) sta->drv_priv; 568 } 569 570 if (!wcid || !wcid->sta) 571 return; 572 573 sta = container_of((void *) wcid, struct ieee80211_sta, drv_priv); 574 575 if (status->signal <= 0) 576 ewma_signal_add(&wcid->rssi, -status->signal); 577 578 wcid->inactive_count = 0; 579 580 if (!test_bit(MT_WCID_FLAG_CHECK_PS, &wcid->flags)) 581 return; 582 583 if (ieee80211_is_pspoll(hdr->frame_control)) { 584 ieee80211_sta_pspoll(sta); 585 return; 586 } 587 588 if (ieee80211_has_morefrags(hdr->frame_control) || 589 !(ieee80211_is_mgmt(hdr->frame_control) || 590 ieee80211_is_data(hdr->frame_control))) 591 return; 592 593 ps = ieee80211_has_pm(hdr->frame_control); 594 595 if (ps && (ieee80211_is_data_qos(hdr->frame_control) || 596 ieee80211_is_qos_nullfunc(hdr->frame_control))) 597 ieee80211_sta_uapsd_trigger(sta, status->tid); 598 599 if (!!test_bit(MT_WCID_FLAG_PS, &wcid->flags) == ps) 600 return; 601 602 if (ps) 603 set_bit(MT_WCID_FLAG_PS, &wcid->flags); 604 else 605 clear_bit(MT_WCID_FLAG_PS, &wcid->flags); 606 607 dev->drv->sta_ps(dev, sta, ps); 608 ieee80211_sta_ps_transition(sta, ps); 609 } 610 611 void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames, 612 struct napi_struct *napi) 613 { 614 struct ieee80211_sta *sta; 615 struct sk_buff *skb; 616 617 spin_lock(&dev->rx_lock); 618 while ((skb = __skb_dequeue(frames)) != NULL) { 619 if (mt76_check_ccmp_pn(skb)) { 620 dev_kfree_skb(skb); 621 continue; 622 } 623 624 sta = mt76_rx_convert(skb); 625 ieee80211_rx_napi(dev->hw, sta, skb, napi); 626 } 627 spin_unlock(&dev->rx_lock); 628 } 629 630 void mt76_rx_poll_complete(struct mt76_dev *dev, enum mt76_rxq_id q, 631 struct napi_struct *napi) 632 { 633 struct sk_buff_head frames; 634 struct sk_buff *skb; 635 636 __skb_queue_head_init(&frames); 637 638 while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) { 639 mt76_check_sta(dev, skb); 640 mt76_rx_aggr_reorder(skb, &frames); 641 } 642 643 mt76_rx_complete(dev, &frames, napi); 644 } 645 EXPORT_SYMBOL_GPL(mt76_rx_poll_complete); 646 647 static int 648 mt76_sta_add(struct mt76_dev *dev, struct ieee80211_vif *vif, 649 struct ieee80211_sta *sta) 650 { 651 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv; 652 int ret; 653 int i; 654 655 mutex_lock(&dev->mutex); 656 657 ret = dev->drv->sta_add(dev, vif, sta); 658 if (ret) 659 goto out; 660 661 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 662 struct mt76_txq *mtxq; 663 664 if (!sta->txq[i]) 665 continue; 666 667 mtxq = (struct mt76_txq *)sta->txq[i]->drv_priv; 668 mtxq->wcid = wcid; 669 670 mt76_txq_init(dev, sta->txq[i]); 671 } 672 673 ewma_signal_init(&wcid->rssi); 674 rcu_assign_pointer(dev->wcid[wcid->idx], wcid); 675 676 out: 677 mutex_unlock(&dev->mutex); 678 679 return ret; 680 } 681 682 void __mt76_sta_remove(struct mt76_dev *dev, struct ieee80211_vif *vif, 683 struct ieee80211_sta *sta) 684 { 685 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv; 686 int i, idx = wcid->idx; 687 688 rcu_assign_pointer(dev->wcid[idx], NULL); 689 synchronize_rcu(); 690 691 if (dev->drv->sta_remove) 692 dev->drv->sta_remove(dev, vif, sta); 693 694 mt76_tx_status_check(dev, wcid, true); 695 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) 696 mt76_txq_remove(dev, sta->txq[i]); 697 mt76_wcid_free(dev->wcid_mask, idx); 698 } 699 EXPORT_SYMBOL_GPL(__mt76_sta_remove); 700 701 static void 702 mt76_sta_remove(struct mt76_dev *dev, struct ieee80211_vif *vif, 703 struct ieee80211_sta *sta) 704 { 705 mutex_lock(&dev->mutex); 706 __mt76_sta_remove(dev, vif, sta); 707 mutex_unlock(&dev->mutex); 708 } 709 710 int mt76_sta_state(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 711 struct ieee80211_sta *sta, 712 enum ieee80211_sta_state old_state, 713 enum ieee80211_sta_state new_state) 714 { 715 struct mt76_dev *dev = hw->priv; 716 717 if (old_state == IEEE80211_STA_NOTEXIST && 718 new_state == IEEE80211_STA_NONE) 719 return mt76_sta_add(dev, vif, sta); 720 721 if (old_state == IEEE80211_STA_AUTH && 722 new_state == IEEE80211_STA_ASSOC && 723 dev->drv->sta_assoc) 724 dev->drv->sta_assoc(dev, vif, sta); 725 726 if (old_state == IEEE80211_STA_NONE && 727 new_state == IEEE80211_STA_NOTEXIST) 728 mt76_sta_remove(dev, vif, sta); 729 730 return 0; 731 } 732 EXPORT_SYMBOL_GPL(mt76_sta_state); 733 734 int mt76_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 735 int *dbm) 736 { 737 struct mt76_dev *dev = hw->priv; 738 int n_chains = hweight8(dev->antenna_mask); 739 740 *dbm = dev->txpower_cur / 2; 741 742 /* convert from per-chain power to combined 743 * output on 2x2 devices 744 */ 745 if (n_chains > 1) 746 *dbm += 3; 747 748 return 0; 749 } 750 EXPORT_SYMBOL_GPL(mt76_get_txpower); 751 752 static void 753 __mt76_csa_finish(void *priv, u8 *mac, struct ieee80211_vif *vif) 754 { 755 if (vif->csa_active && ieee80211_csa_is_complete(vif)) 756 ieee80211_csa_finish(vif); 757 } 758 759 void mt76_csa_finish(struct mt76_dev *dev) 760 { 761 if (!dev->csa_complete) 762 return; 763 764 ieee80211_iterate_active_interfaces_atomic(dev->hw, 765 IEEE80211_IFACE_ITER_RESUME_ALL, 766 __mt76_csa_finish, dev); 767 768 dev->csa_complete = 0; 769 } 770 EXPORT_SYMBOL_GPL(mt76_csa_finish); 771 772 static void 773 __mt76_csa_check(void *priv, u8 *mac, struct ieee80211_vif *vif) 774 { 775 struct mt76_dev *dev = priv; 776 777 if (!vif->csa_active) 778 return; 779 780 dev->csa_complete |= ieee80211_csa_is_complete(vif); 781 } 782 783 void mt76_csa_check(struct mt76_dev *dev) 784 { 785 ieee80211_iterate_active_interfaces_atomic(dev->hw, 786 IEEE80211_IFACE_ITER_RESUME_ALL, 787 __mt76_csa_check, dev); 788 } 789 EXPORT_SYMBOL_GPL(mt76_csa_check); 790