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 led_classdev_register(dev->dev, &dev->led_cdev); 109 } 110 111 static void mt76_led_cleanup(struct mt76_dev *dev) 112 { 113 if (!dev->led_cdev.brightness_set && !dev->led_cdev.blink_set) 114 return; 115 116 led_classdev_unregister(&dev->led_cdev); 117 } 118 119 static void mt76_init_stream_cap(struct mt76_dev *dev, 120 struct ieee80211_supported_band *sband, 121 bool vht) 122 { 123 struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap; 124 int i, nstream = hweight8(dev->antenna_mask); 125 struct ieee80211_sta_vht_cap *vht_cap; 126 u16 mcs_map = 0; 127 128 if (nstream > 1) 129 ht_cap->cap |= IEEE80211_HT_CAP_TX_STBC; 130 else 131 ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC; 132 133 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) 134 ht_cap->mcs.rx_mask[i] = i < nstream ? 0xff : 0; 135 136 if (!vht) 137 return; 138 139 vht_cap = &sband->vht_cap; 140 if (nstream > 1) 141 vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC; 142 else 143 vht_cap->cap &= ~IEEE80211_VHT_CAP_TXSTBC; 144 145 for (i = 0; i < 8; i++) { 146 if (i < nstream) 147 mcs_map |= (IEEE80211_VHT_MCS_SUPPORT_0_9 << (i * 2)); 148 else 149 mcs_map |= 150 (IEEE80211_VHT_MCS_NOT_SUPPORTED << (i * 2)); 151 } 152 vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map); 153 vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map); 154 } 155 156 void mt76_set_stream_caps(struct mt76_dev *dev, bool vht) 157 { 158 if (dev->cap.has_2ghz) 159 mt76_init_stream_cap(dev, &dev->sband_2g.sband, false); 160 if (dev->cap.has_5ghz) 161 mt76_init_stream_cap(dev, &dev->sband_5g.sband, vht); 162 } 163 EXPORT_SYMBOL_GPL(mt76_set_stream_caps); 164 165 static int 166 mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband, 167 const struct ieee80211_channel *chan, int n_chan, 168 struct ieee80211_rate *rates, int n_rates, bool vht) 169 { 170 struct ieee80211_supported_band *sband = &msband->sband; 171 struct ieee80211_sta_ht_cap *ht_cap; 172 struct ieee80211_sta_vht_cap *vht_cap; 173 void *chanlist; 174 int size; 175 176 size = n_chan * sizeof(*chan); 177 chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL); 178 if (!chanlist) 179 return -ENOMEM; 180 181 msband->chan = devm_kcalloc(dev->dev, n_chan, sizeof(*msband->chan), 182 GFP_KERNEL); 183 if (!msband->chan) 184 return -ENOMEM; 185 186 sband->channels = chanlist; 187 sband->n_channels = n_chan; 188 sband->bitrates = rates; 189 sband->n_bitrates = n_rates; 190 dev->chandef.chan = &sband->channels[0]; 191 dev->chan_state = &msband->chan[0]; 192 193 ht_cap = &sband->ht_cap; 194 ht_cap->ht_supported = true; 195 ht_cap->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 196 IEEE80211_HT_CAP_GRN_FLD | 197 IEEE80211_HT_CAP_SGI_20 | 198 IEEE80211_HT_CAP_SGI_40 | 199 (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT); 200 201 ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; 202 ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K; 203 ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4; 204 205 mt76_init_stream_cap(dev, sband, vht); 206 207 if (!vht) 208 return 0; 209 210 vht_cap = &sband->vht_cap; 211 vht_cap->vht_supported = true; 212 vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC | 213 IEEE80211_VHT_CAP_RXSTBC_1 | 214 IEEE80211_VHT_CAP_SHORT_GI_80 | 215 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 216 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 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 tasklet_init(&dev->tx_tasklet, mt76_tx_tasklet, (unsigned long)dev); 296 297 return dev; 298 } 299 EXPORT_SYMBOL_GPL(mt76_alloc_device); 300 301 int mt76_register_device(struct mt76_dev *dev, bool vht, 302 struct ieee80211_rate *rates, int n_rates) 303 { 304 struct ieee80211_hw *hw = dev->hw; 305 struct wiphy *wiphy = hw->wiphy; 306 int ret; 307 308 dev_set_drvdata(dev->dev, dev); 309 310 INIT_LIST_HEAD(&dev->txwi_cache); 311 312 SET_IEEE80211_DEV(hw, dev->dev); 313 SET_IEEE80211_PERM_ADDR(hw, dev->macaddr); 314 315 wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR; 316 317 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 318 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_AIRTIME_FAIRNESS); 319 320 wiphy->available_antennas_tx = dev->antenna_mask; 321 wiphy->available_antennas_rx = dev->antenna_mask; 322 323 hw->txq_data_size = sizeof(struct mt76_txq); 324 hw->max_tx_fragments = 16; 325 326 ieee80211_hw_set(hw, SIGNAL_DBM); 327 ieee80211_hw_set(hw, PS_NULLFUNC_STACK); 328 ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING); 329 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 330 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE); 331 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 332 ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS); 333 ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU); 334 ieee80211_hw_set(hw, TX_AMSDU); 335 ieee80211_hw_set(hw, TX_FRAG_LIST); 336 ieee80211_hw_set(hw, MFP_CAPABLE); 337 ieee80211_hw_set(hw, AP_LINK_PS); 338 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 339 ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR); 340 ieee80211_hw_set(hw, SUPPORTS_REORDERING_BUFFER); 341 342 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 343 wiphy->interface_modes = 344 BIT(NL80211_IFTYPE_STATION) | 345 BIT(NL80211_IFTYPE_AP) | 346 #ifdef CONFIG_MAC80211_MESH 347 BIT(NL80211_IFTYPE_MESH_POINT) | 348 #endif 349 BIT(NL80211_IFTYPE_ADHOC); 350 351 if (dev->cap.has_2ghz) { 352 ret = mt76_init_sband_2g(dev, rates, n_rates); 353 if (ret) 354 return ret; 355 } 356 357 if (dev->cap.has_5ghz) { 358 ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht); 359 if (ret) 360 return ret; 361 } 362 363 wiphy_read_of_freq_limits(dev->hw->wiphy); 364 mt76_check_sband(dev, NL80211_BAND_2GHZ); 365 mt76_check_sband(dev, NL80211_BAND_5GHZ); 366 367 if (IS_ENABLED(CONFIG_MT76_LEDS)) { 368 ret = mt76_led_init(dev); 369 if (ret) 370 return ret; 371 } 372 373 return ieee80211_register_hw(hw); 374 } 375 EXPORT_SYMBOL_GPL(mt76_register_device); 376 377 void mt76_unregister_device(struct mt76_dev *dev) 378 { 379 struct ieee80211_hw *hw = dev->hw; 380 381 mt76_led_cleanup(dev); 382 mt76_tx_status_check(dev, NULL, true); 383 ieee80211_unregister_hw(hw); 384 } 385 EXPORT_SYMBOL_GPL(mt76_unregister_device); 386 387 void mt76_free_device(struct mt76_dev *dev) 388 { 389 mt76_tx_free(dev); 390 ieee80211_free_hw(dev->hw); 391 } 392 EXPORT_SYMBOL_GPL(mt76_free_device); 393 394 void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb) 395 { 396 if (!test_bit(MT76_STATE_RUNNING, &dev->state)) { 397 dev_kfree_skb(skb); 398 return; 399 } 400 401 __skb_queue_tail(&dev->rx_skb[q], skb); 402 } 403 EXPORT_SYMBOL_GPL(mt76_rx); 404 405 bool mt76_has_tx_pending(struct mt76_dev *dev) 406 { 407 struct mt76_queue *q; 408 int i; 409 410 for (i = 0; i < ARRAY_SIZE(dev->q_tx); i++) { 411 q = dev->q_tx[i].q; 412 if (q && q->queued) 413 return true; 414 } 415 416 return false; 417 } 418 EXPORT_SYMBOL_GPL(mt76_has_tx_pending); 419 420 static struct mt76_channel_state * 421 mt76_channel_state(struct mt76_dev *dev, struct ieee80211_channel *c) 422 { 423 struct mt76_sband *msband; 424 int idx; 425 426 if (c->band == NL80211_BAND_2GHZ) 427 msband = &dev->sband_2g; 428 else 429 msband = &dev->sband_5g; 430 431 idx = c - &msband->sband.channels[0]; 432 return &msband->chan[idx]; 433 } 434 435 void mt76_update_survey(struct mt76_dev *dev) 436 { 437 struct mt76_channel_state *state = dev->chan_state; 438 ktime_t cur_time; 439 440 if (!test_bit(MT76_STATE_RUNNING, &dev->state)) 441 return; 442 443 if (dev->drv->update_survey) 444 dev->drv->update_survey(dev); 445 446 cur_time = ktime_get_boottime(); 447 state->cc_active += ktime_to_us(ktime_sub(cur_time, 448 dev->survey_time)); 449 dev->survey_time = cur_time; 450 451 if (dev->drv->drv_flags & MT_DRV_SW_RX_AIRTIME) { 452 spin_lock_bh(&dev->cc_lock); 453 state->cc_bss_rx += dev->cur_cc_bss_rx; 454 dev->cur_cc_bss_rx = 0; 455 spin_unlock_bh(&dev->cc_lock); 456 } 457 } 458 EXPORT_SYMBOL_GPL(mt76_update_survey); 459 460 void mt76_set_channel(struct mt76_dev *dev) 461 { 462 struct ieee80211_hw *hw = dev->hw; 463 struct cfg80211_chan_def *chandef = &hw->conf.chandef; 464 bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL; 465 int timeout = HZ / 5; 466 467 wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(dev), timeout); 468 mt76_update_survey(dev); 469 470 dev->chandef = *chandef; 471 dev->chan_state = mt76_channel_state(dev, chandef->chan); 472 473 if (!offchannel) 474 dev->main_chan = chandef->chan; 475 476 if (chandef->chan != dev->main_chan) 477 memset(dev->chan_state, 0, sizeof(*dev->chan_state)); 478 } 479 EXPORT_SYMBOL_GPL(mt76_set_channel); 480 481 int mt76_get_survey(struct ieee80211_hw *hw, int idx, 482 struct survey_info *survey) 483 { 484 struct mt76_dev *dev = hw->priv; 485 struct mt76_sband *sband; 486 struct ieee80211_channel *chan; 487 struct mt76_channel_state *state; 488 int ret = 0; 489 490 mutex_lock(&dev->mutex); 491 if (idx == 0 && dev->drv->update_survey) 492 mt76_update_survey(dev); 493 494 sband = &dev->sband_2g; 495 if (idx >= sband->sband.n_channels) { 496 idx -= sband->sband.n_channels; 497 sband = &dev->sband_5g; 498 } 499 500 if (idx >= sband->sband.n_channels) { 501 ret = -ENOENT; 502 goto out; 503 } 504 505 chan = &sband->sband.channels[idx]; 506 state = mt76_channel_state(dev, chan); 507 508 memset(survey, 0, sizeof(*survey)); 509 survey->channel = chan; 510 survey->filled = SURVEY_INFO_TIME | SURVEY_INFO_TIME_BUSY; 511 survey->filled |= dev->drv->survey_flags; 512 if (chan == dev->main_chan) { 513 survey->filled |= SURVEY_INFO_IN_USE; 514 515 if (dev->drv->drv_flags & MT_DRV_SW_RX_AIRTIME) 516 survey->filled |= SURVEY_INFO_TIME_BSS_RX; 517 } 518 519 survey->time_busy = div_u64(state->cc_busy, 1000); 520 survey->time_rx = div_u64(state->cc_rx, 1000); 521 survey->time = div_u64(state->cc_active, 1000); 522 523 spin_lock_bh(&dev->cc_lock); 524 survey->time_bss_rx = div_u64(state->cc_bss_rx, 1000); 525 survey->time_tx = div_u64(state->cc_tx, 1000); 526 spin_unlock_bh(&dev->cc_lock); 527 528 out: 529 mutex_unlock(&dev->mutex); 530 531 return ret; 532 } 533 EXPORT_SYMBOL_GPL(mt76_get_survey); 534 535 void mt76_wcid_key_setup(struct mt76_dev *dev, struct mt76_wcid *wcid, 536 struct ieee80211_key_conf *key) 537 { 538 struct ieee80211_key_seq seq; 539 int i; 540 541 wcid->rx_check_pn = false; 542 543 if (!key) 544 return; 545 546 if (key->cipher != WLAN_CIPHER_SUITE_CCMP) 547 return; 548 549 wcid->rx_check_pn = true; 550 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 551 ieee80211_get_key_rx_seq(key, i, &seq); 552 memcpy(wcid->rx_key_pn[i], seq.ccmp.pn, sizeof(seq.ccmp.pn)); 553 } 554 } 555 EXPORT_SYMBOL(mt76_wcid_key_setup); 556 557 static struct ieee80211_sta *mt76_rx_convert(struct sk_buff *skb) 558 { 559 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); 560 struct mt76_rx_status mstat; 561 562 mstat = *((struct mt76_rx_status *)skb->cb); 563 memset(status, 0, sizeof(*status)); 564 565 status->flag = mstat.flag; 566 status->freq = mstat.freq; 567 status->enc_flags = mstat.enc_flags; 568 status->encoding = mstat.encoding; 569 status->bw = mstat.bw; 570 status->rate_idx = mstat.rate_idx; 571 status->nss = mstat.nss; 572 status->band = mstat.band; 573 status->signal = mstat.signal; 574 status->chains = mstat.chains; 575 status->ampdu_reference = mstat.ampdu_ref; 576 577 BUILD_BUG_ON(sizeof(mstat) > sizeof(skb->cb)); 578 BUILD_BUG_ON(sizeof(status->chain_signal) != 579 sizeof(mstat.chain_signal)); 580 memcpy(status->chain_signal, mstat.chain_signal, 581 sizeof(mstat.chain_signal)); 582 583 return wcid_to_sta(mstat.wcid); 584 } 585 586 static int 587 mt76_check_ccmp_pn(struct sk_buff *skb) 588 { 589 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; 590 struct mt76_wcid *wcid = status->wcid; 591 struct ieee80211_hdr *hdr; 592 int ret; 593 594 if (!(status->flag & RX_FLAG_DECRYPTED)) 595 return 0; 596 597 if (!wcid || !wcid->rx_check_pn) 598 return 0; 599 600 if (!(status->flag & RX_FLAG_IV_STRIPPED)) { 601 /* 602 * Validate the first fragment both here and in mac80211 603 * All further fragments will be validated by mac80211 only. 604 */ 605 hdr = (struct ieee80211_hdr *)skb->data; 606 if (ieee80211_is_frag(hdr) && 607 !ieee80211_is_first_frag(hdr->frame_control)) 608 return 0; 609 } 610 611 BUILD_BUG_ON(sizeof(status->iv) != sizeof(wcid->rx_key_pn[0])); 612 ret = memcmp(status->iv, wcid->rx_key_pn[status->tid], 613 sizeof(status->iv)); 614 if (ret <= 0) 615 return -EINVAL; /* replay */ 616 617 memcpy(wcid->rx_key_pn[status->tid], status->iv, sizeof(status->iv)); 618 619 if (status->flag & RX_FLAG_IV_STRIPPED) 620 status->flag |= RX_FLAG_PN_VALIDATED; 621 622 return 0; 623 } 624 625 static void 626 mt76_airtime_report(struct mt76_dev *dev, struct mt76_rx_status *status, 627 int len) 628 { 629 struct mt76_wcid *wcid = status->wcid; 630 struct ieee80211_sta *sta; 631 u32 airtime; 632 633 airtime = mt76_calc_rx_airtime(dev, status, len); 634 spin_lock(&dev->cc_lock); 635 dev->cur_cc_bss_rx += airtime; 636 spin_unlock(&dev->cc_lock); 637 638 if (!wcid || !wcid->sta) 639 return; 640 641 sta = container_of((void *)wcid, struct ieee80211_sta, drv_priv); 642 ieee80211_sta_register_airtime(sta, status->tid, 0, airtime); 643 } 644 645 static void 646 mt76_airtime_flush_ampdu(struct mt76_dev *dev) 647 { 648 struct mt76_wcid *wcid; 649 int wcid_idx; 650 651 if (!dev->rx_ampdu_len) 652 return; 653 654 wcid_idx = dev->rx_ampdu_status.wcid_idx; 655 if (wcid_idx < ARRAY_SIZE(dev->wcid)) 656 wcid = rcu_dereference(dev->wcid[wcid_idx]); 657 else 658 wcid = NULL; 659 dev->rx_ampdu_status.wcid = wcid; 660 661 mt76_airtime_report(dev, &dev->rx_ampdu_status, dev->rx_ampdu_len); 662 663 dev->rx_ampdu_len = 0; 664 dev->rx_ampdu_ref = 0; 665 } 666 667 static void 668 mt76_airtime_check(struct mt76_dev *dev, struct sk_buff *skb) 669 { 670 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 671 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; 672 struct mt76_wcid *wcid = status->wcid; 673 674 if (!(dev->drv->drv_flags & MT_DRV_SW_RX_AIRTIME)) 675 return; 676 677 if (!wcid || !wcid->sta) { 678 if (!ether_addr_equal(hdr->addr1, dev->macaddr)) 679 return; 680 681 wcid = NULL; 682 } 683 684 if (!(status->flag & RX_FLAG_AMPDU_DETAILS) || 685 status->ampdu_ref != dev->rx_ampdu_ref) 686 mt76_airtime_flush_ampdu(dev); 687 688 if (status->flag & RX_FLAG_AMPDU_DETAILS) { 689 if (!dev->rx_ampdu_len || 690 status->ampdu_ref != dev->rx_ampdu_ref) { 691 dev->rx_ampdu_status = *status; 692 dev->rx_ampdu_status.wcid_idx = wcid ? wcid->idx : 0xff; 693 dev->rx_ampdu_ref = status->ampdu_ref; 694 } 695 696 dev->rx_ampdu_len += skb->len; 697 return; 698 } 699 700 mt76_airtime_report(dev, status, skb->len); 701 } 702 703 static void 704 mt76_check_sta(struct mt76_dev *dev, struct sk_buff *skb) 705 { 706 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; 707 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 708 struct ieee80211_sta *sta; 709 struct mt76_wcid *wcid = status->wcid; 710 bool ps; 711 int i; 712 713 if (ieee80211_is_pspoll(hdr->frame_control) && !wcid) { 714 sta = ieee80211_find_sta_by_ifaddr(dev->hw, hdr->addr2, NULL); 715 if (sta) 716 wcid = status->wcid = (struct mt76_wcid *)sta->drv_priv; 717 } 718 719 mt76_airtime_check(dev, skb); 720 721 if (!wcid || !wcid->sta) 722 return; 723 724 sta = container_of((void *)wcid, struct ieee80211_sta, drv_priv); 725 726 if (status->signal <= 0) 727 ewma_signal_add(&wcid->rssi, -status->signal); 728 729 wcid->inactive_count = 0; 730 731 if (!test_bit(MT_WCID_FLAG_CHECK_PS, &wcid->flags)) 732 return; 733 734 if (ieee80211_is_pspoll(hdr->frame_control)) { 735 ieee80211_sta_pspoll(sta); 736 return; 737 } 738 739 if (ieee80211_has_morefrags(hdr->frame_control) || 740 !(ieee80211_is_mgmt(hdr->frame_control) || 741 ieee80211_is_data(hdr->frame_control))) 742 return; 743 744 ps = ieee80211_has_pm(hdr->frame_control); 745 746 if (ps && (ieee80211_is_data_qos(hdr->frame_control) || 747 ieee80211_is_qos_nullfunc(hdr->frame_control))) 748 ieee80211_sta_uapsd_trigger(sta, status->tid); 749 750 if (!!test_bit(MT_WCID_FLAG_PS, &wcid->flags) == ps) 751 return; 752 753 if (ps) 754 set_bit(MT_WCID_FLAG_PS, &wcid->flags); 755 else 756 clear_bit(MT_WCID_FLAG_PS, &wcid->flags); 757 758 dev->drv->sta_ps(dev, sta, ps); 759 ieee80211_sta_ps_transition(sta, ps); 760 761 if (ps) 762 return; 763 764 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 765 struct mt76_txq *mtxq; 766 767 if (!sta->txq[i]) 768 continue; 769 770 mtxq = (struct mt76_txq *)sta->txq[i]->drv_priv; 771 if (!skb_queue_empty(&mtxq->retry_q)) 772 ieee80211_schedule_txq(dev->hw, sta->txq[i]); 773 } 774 } 775 776 void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames, 777 struct napi_struct *napi) 778 { 779 struct ieee80211_sta *sta; 780 struct sk_buff *skb; 781 782 spin_lock(&dev->rx_lock); 783 while ((skb = __skb_dequeue(frames)) != NULL) { 784 if (mt76_check_ccmp_pn(skb)) { 785 dev_kfree_skb(skb); 786 continue; 787 } 788 789 sta = mt76_rx_convert(skb); 790 ieee80211_rx_napi(dev->hw, sta, skb, napi); 791 } 792 spin_unlock(&dev->rx_lock); 793 } 794 795 void mt76_rx_poll_complete(struct mt76_dev *dev, enum mt76_rxq_id q, 796 struct napi_struct *napi) 797 { 798 struct sk_buff_head frames; 799 struct sk_buff *skb; 800 801 __skb_queue_head_init(&frames); 802 803 while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) { 804 mt76_check_sta(dev, skb); 805 mt76_rx_aggr_reorder(skb, &frames); 806 } 807 808 mt76_rx_complete(dev, &frames, napi); 809 } 810 EXPORT_SYMBOL_GPL(mt76_rx_poll_complete); 811 812 static int 813 mt76_sta_add(struct mt76_dev *dev, struct ieee80211_vif *vif, 814 struct ieee80211_sta *sta) 815 { 816 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv; 817 int ret; 818 int i; 819 820 mutex_lock(&dev->mutex); 821 822 ret = dev->drv->sta_add(dev, vif, sta); 823 if (ret) 824 goto out; 825 826 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { 827 struct mt76_txq *mtxq; 828 829 if (!sta->txq[i]) 830 continue; 831 832 mtxq = (struct mt76_txq *)sta->txq[i]->drv_priv; 833 mtxq->wcid = wcid; 834 835 mt76_txq_init(dev, sta->txq[i]); 836 } 837 838 ewma_signal_init(&wcid->rssi); 839 rcu_assign_pointer(dev->wcid[wcid->idx], wcid); 840 841 out: 842 mutex_unlock(&dev->mutex); 843 844 return ret; 845 } 846 847 void __mt76_sta_remove(struct mt76_dev *dev, struct ieee80211_vif *vif, 848 struct ieee80211_sta *sta) 849 { 850 struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv; 851 int i, idx = wcid->idx; 852 853 rcu_assign_pointer(dev->wcid[idx], NULL); 854 synchronize_rcu(); 855 856 for (i = 0; i < ARRAY_SIZE(wcid->aggr); i++) 857 mt76_rx_aggr_stop(dev, wcid, i); 858 859 if (dev->drv->sta_remove) 860 dev->drv->sta_remove(dev, vif, sta); 861 862 mt76_tx_status_check(dev, wcid, true); 863 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) 864 mt76_txq_remove(dev, sta->txq[i]); 865 mt76_wcid_free(dev->wcid_mask, idx); 866 } 867 EXPORT_SYMBOL_GPL(__mt76_sta_remove); 868 869 static void 870 mt76_sta_remove(struct mt76_dev *dev, struct ieee80211_vif *vif, 871 struct ieee80211_sta *sta) 872 { 873 mutex_lock(&dev->mutex); 874 __mt76_sta_remove(dev, vif, sta); 875 mutex_unlock(&dev->mutex); 876 } 877 878 int mt76_sta_state(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 879 struct ieee80211_sta *sta, 880 enum ieee80211_sta_state old_state, 881 enum ieee80211_sta_state new_state) 882 { 883 struct mt76_dev *dev = hw->priv; 884 885 if (old_state == IEEE80211_STA_NOTEXIST && 886 new_state == IEEE80211_STA_NONE) 887 return mt76_sta_add(dev, vif, sta); 888 889 if (old_state == IEEE80211_STA_AUTH && 890 new_state == IEEE80211_STA_ASSOC && 891 dev->drv->sta_assoc) 892 dev->drv->sta_assoc(dev, vif, sta); 893 894 if (old_state == IEEE80211_STA_NONE && 895 new_state == IEEE80211_STA_NOTEXIST) 896 mt76_sta_remove(dev, vif, sta); 897 898 return 0; 899 } 900 EXPORT_SYMBOL_GPL(mt76_sta_state); 901 902 int mt76_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 903 int *dbm) 904 { 905 struct mt76_dev *dev = hw->priv; 906 int n_chains = hweight8(dev->antenna_mask); 907 908 *dbm = DIV_ROUND_UP(dev->txpower_cur, 2); 909 910 /* convert from per-chain power to combined 911 * output power 912 */ 913 switch (n_chains) { 914 case 4: 915 *dbm += 6; 916 break; 917 case 3: 918 *dbm += 4; 919 break; 920 case 2: 921 *dbm += 3; 922 break; 923 default: 924 break; 925 } 926 927 return 0; 928 } 929 EXPORT_SYMBOL_GPL(mt76_get_txpower); 930 931 static void 932 __mt76_csa_finish(void *priv, u8 *mac, struct ieee80211_vif *vif) 933 { 934 if (vif->csa_active && ieee80211_csa_is_complete(vif)) 935 ieee80211_csa_finish(vif); 936 } 937 938 void mt76_csa_finish(struct mt76_dev *dev) 939 { 940 if (!dev->csa_complete) 941 return; 942 943 ieee80211_iterate_active_interfaces_atomic(dev->hw, 944 IEEE80211_IFACE_ITER_RESUME_ALL, 945 __mt76_csa_finish, dev); 946 947 dev->csa_complete = 0; 948 } 949 EXPORT_SYMBOL_GPL(mt76_csa_finish); 950 951 static void 952 __mt76_csa_check(void *priv, u8 *mac, struct ieee80211_vif *vif) 953 { 954 struct mt76_dev *dev = priv; 955 956 if (!vif->csa_active) 957 return; 958 959 dev->csa_complete |= ieee80211_csa_is_complete(vif); 960 } 961 962 void mt76_csa_check(struct mt76_dev *dev) 963 { 964 ieee80211_iterate_active_interfaces_atomic(dev->hw, 965 IEEE80211_IFACE_ITER_RESUME_ALL, 966 __mt76_csa_check, dev); 967 } 968 EXPORT_SYMBOL_GPL(mt76_csa_check); 969 970 int 971 mt76_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set) 972 { 973 return 0; 974 } 975 EXPORT_SYMBOL_GPL(mt76_set_tim); 976 977 void mt76_insert_ccmp_hdr(struct sk_buff *skb, u8 key_id) 978 { 979 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; 980 int hdr_len = ieee80211_get_hdrlen_from_skb(skb); 981 u8 *hdr, *pn = status->iv; 982 983 __skb_push(skb, 8); 984 memmove(skb->data, skb->data + 8, hdr_len); 985 hdr = skb->data + hdr_len; 986 987 hdr[0] = pn[5]; 988 hdr[1] = pn[4]; 989 hdr[2] = 0; 990 hdr[3] = 0x20 | (key_id << 6); 991 hdr[4] = pn[3]; 992 hdr[5] = pn[2]; 993 hdr[6] = pn[1]; 994 hdr[7] = pn[0]; 995 996 status->flag &= ~RX_FLAG_IV_STRIPPED; 997 } 998 EXPORT_SYMBOL_GPL(mt76_insert_ccmp_hdr); 999 1000 int mt76_get_rate(struct mt76_dev *dev, 1001 struct ieee80211_supported_band *sband, 1002 int idx, bool cck) 1003 { 1004 int i, offset = 0, len = sband->n_bitrates; 1005 1006 if (cck) { 1007 if (sband == &dev->sband_5g.sband) 1008 return 0; 1009 1010 idx &= ~BIT(2); /* short preamble */ 1011 } else if (sband == &dev->sband_2g.sband) { 1012 offset = 4; 1013 } 1014 1015 for (i = offset; i < len; i++) { 1016 if ((sband->bitrates[i].hw_value & GENMASK(7, 0)) == idx) 1017 return i; 1018 } 1019 1020 return 0; 1021 } 1022 EXPORT_SYMBOL_GPL(mt76_get_rate); 1023 1024 void mt76_sw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1025 const u8 *mac) 1026 { 1027 struct mt76_dev *dev = hw->priv; 1028 1029 set_bit(MT76_SCANNING, &dev->state); 1030 } 1031 EXPORT_SYMBOL_GPL(mt76_sw_scan); 1032 1033 void mt76_sw_scan_complete(struct ieee80211_hw *hw, struct ieee80211_vif *vif) 1034 { 1035 struct mt76_dev *dev = hw->priv; 1036 1037 clear_bit(MT76_SCANNING, &dev->state); 1038 } 1039 EXPORT_SYMBOL_GPL(mt76_sw_scan_complete); 1040 1041 int mt76_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) 1042 { 1043 struct mt76_dev *dev = hw->priv; 1044 1045 mutex_lock(&dev->mutex); 1046 *tx_ant = dev->antenna_mask; 1047 *rx_ant = dev->antenna_mask; 1048 mutex_unlock(&dev->mutex); 1049 1050 return 0; 1051 } 1052 EXPORT_SYMBOL_GPL(mt76_get_antenna); 1053