drivers/net/wireless/mediatek/mt76/mt76x02_util.c

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
   4  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
   5  */
   6
   7 #include <linux/module.h>
   8 #include "mt76x02.h"
   9
  10 #define MT76x02_CCK_RATE(_idx, _rate) {                                 \
  11         .bitrate = _rate,                                       \
  12         .flags = IEEE80211_RATE_SHORT_PREAMBLE,                 \
  13         .hw_value = (MT_PHY_TYPE_CCK << 8) | (_idx),            \
  14         .hw_value_short = (MT_PHY_TYPE_CCK << 8) | (8 + (_idx)),        \
  15 }
  16
  17 struct ieee80211_rate mt76x02_rates[] = {
  18         MT76x02_CCK_RATE(0, 10),
  19         MT76x02_CCK_RATE(1, 20),
  20         MT76x02_CCK_RATE(2, 55),
  21         MT76x02_CCK_RATE(3, 110),
  22         OFDM_RATE(0, 60),
  23         OFDM_RATE(1, 90),
  24         OFDM_RATE(2, 120),
  25         OFDM_RATE(3, 180),
  26         OFDM_RATE(4, 240),
  27         OFDM_RATE(5, 360),
  28         OFDM_RATE(6, 480),
  29         OFDM_RATE(7, 540),
  30 };
  31 EXPORT_SYMBOL_GPL(mt76x02_rates);
  32
  33 static const struct ieee80211_iface_limit mt76x02_if_limits[] = {
  34         {
  35                 .max = 1,
  36                 .types = BIT(NL80211_IFTYPE_ADHOC)
  37         }, {
  38                 .max = 8,
  39                 .types = BIT(NL80211_IFTYPE_STATION) |
  40 #ifdef CONFIG_MAC80211_MESH
  41                          BIT(NL80211_IFTYPE_MESH_POINT) |
  42 #endif
  43                          BIT(NL80211_IFTYPE_P2P_CLIENT) |
  44                          BIT(NL80211_IFTYPE_P2P_GO) |
  45                          BIT(NL80211_IFTYPE_AP)
  46          },
  47 };
  48
  49 static const struct ieee80211_iface_limit mt76x02u_if_limits[] = {
  50         {
  51                 .max = 1,
  52                 .types = BIT(NL80211_IFTYPE_ADHOC)
  53         }, {
  54                 .max = 2,
  55                 .types = BIT(NL80211_IFTYPE_STATION) |
  56 #ifdef CONFIG_MAC80211_MESH
  57                          BIT(NL80211_IFTYPE_MESH_POINT) |
  58 #endif
  59                          BIT(NL80211_IFTYPE_P2P_CLIENT) |
  60                          BIT(NL80211_IFTYPE_P2P_GO) |
  61                          BIT(NL80211_IFTYPE_AP)
  62         },
  63 };
  64
  65 static const struct ieee80211_iface_combination mt76x02_if_comb[] = {
  66         {
  67                 .limits = mt76x02_if_limits,
  68                 .n_limits = ARRAY_SIZE(mt76x02_if_limits),
  69                 .max_interfaces = 8,
  70                 .num_different_channels = 1,
  71                 .beacon_int_infra_match = true,
  72                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
  73                                        BIT(NL80211_CHAN_WIDTH_20) |
  74                                        BIT(NL80211_CHAN_WIDTH_40) |
  75                                        BIT(NL80211_CHAN_WIDTH_80),
  76         }
  77 };
  78
  79 static const struct ieee80211_iface_combination mt76x02u_if_comb[] = {
  80         {
  81                 .limits = mt76x02u_if_limits,
  82                 .n_limits = ARRAY_SIZE(mt76x02u_if_limits),
  83                 .max_interfaces = 2,
  84                 .num_different_channels = 1,
  85                 .beacon_int_infra_match = true,
  86         }
  87 };
  88
  89 static void
  90 mt76x02_led_set_config(struct mt76_phy *mphy, u8 delay_on, u8 delay_off)
  91 {
  92         struct mt76x02_dev *dev = container_of(mphy->dev, struct mt76x02_dev,
  93                                                mt76);
  94         u32 val;
  95
  96         val = FIELD_PREP(MT_LED_STATUS_DURATION, 0xff) |
  97               FIELD_PREP(MT_LED_STATUS_OFF, delay_off) |
  98               FIELD_PREP(MT_LED_STATUS_ON, delay_on);
  99
 100         mt76_wr(dev, MT_LED_S0(mphy->leds.pin), val);
 101         mt76_wr(dev, MT_LED_S1(mphy->leds.pin), val);
 102
 103         val = MT_LED_CTRL_REPLAY(mphy->leds.pin) |
 104               MT_LED_CTRL_KICK(mphy->leds.pin);
 105         if (mphy->leds.al)
 106                 val |= MT_LED_CTRL_POLARITY(mphy->leds.pin);
 107         mt76_wr(dev, MT_LED_CTRL, val);
 108 }
 109
 110 static int
 111 mt76x02_led_set_blink(struct led_classdev *led_cdev,
 112                       unsigned long *delay_on,
 113                       unsigned long *delay_off)
 114 {
 115         struct mt76_phy *mphy = container_of(led_cdev, struct mt76_phy,
 116                                              leds.cdev);
 117         u8 delta_on, delta_off;
 118
 119         delta_off = max_t(u8, *delay_off / 10, 1);
 120         delta_on = max_t(u8, *delay_on / 10, 1);
 121
 122         mt76x02_led_set_config(mphy, delta_on, delta_off);
 123
 124         return 0;
 125 }
 126
 127 static void
 128 mt76x02_led_set_brightness(struct led_classdev *led_cdev,
 129                            enum led_brightness brightness)
 130 {
 131         struct mt76_phy *mphy = container_of(led_cdev, struct mt76_phy,
 132                                              leds.cdev);
 133
 134         if (!brightness)
 135                 mt76x02_led_set_config(mphy, 0, 0xff);
 136         else
 137                 mt76x02_led_set_config(mphy, 0xff, 0);
 138 }
 139
 140 int mt76x02_init_device(struct mt76x02_dev *dev)
 141 {
 142         struct ieee80211_hw *hw = mt76_hw(dev);
 143         struct wiphy *wiphy = hw->wiphy;
 144
 145         INIT_DELAYED_WORK(&dev->mphy.mac_work, mt76x02_mac_work);
 146
 147         hw->queues = 4;
 148         hw->max_rates = 1;
 149         hw->max_report_rates = 7;
 150         hw->max_rate_tries = 1;
 151         hw->extra_tx_headroom = 2;
 152
 153         if (mt76_is_usb(&dev->mt76)) {
 154                 hw->extra_tx_headroom += sizeof(struct mt76x02_txwi) +
 155                                          MT_DMA_HDR_LEN;
 156                 wiphy->iface_combinations = mt76x02u_if_comb;
 157                 wiphy->n_iface_combinations = ARRAY_SIZE(mt76x02u_if_comb);
 158         } else {
 159                 INIT_DELAYED_WORK(&dev->wdt_work, mt76x02_wdt_work);
 160
 161                 mt76x02_dfs_init_detector(dev);
 162
 163                 wiphy->reg_notifier = mt76x02_regd_notifier;
 164                 wiphy->iface_combinations = mt76x02_if_comb;
 165                 wiphy->n_iface_combinations = ARRAY_SIZE(mt76x02_if_comb);
 166
 167                 /* init led callbacks */
 168                 if (IS_ENABLED(CONFIG_MT76_LEDS)) {
 169                         dev->mphy.leds.cdev.brightness_set =
 170                                         mt76x02_led_set_brightness;
 171                         dev->mphy.leds.cdev.blink_set = mt76x02_led_set_blink;
 172                 }
 173         }
 174
 175         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
 176
 177         hw->sta_data_size = sizeof(struct mt76x02_sta);
 178         hw->vif_data_size = sizeof(struct mt76x02_vif);
 179
 180         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
 181         ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
 182         ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
 183
 184         dev->mt76.global_wcid.idx = 255;
 185         dev->mt76.global_wcid.hw_key_idx = -1;
 186         dev->slottime = 9;
 187
 188         if (is_mt76x2(dev)) {
 189                 dev->mphy.sband_2g.sband.ht_cap.cap |=
 190                                 IEEE80211_HT_CAP_LDPC_CODING;
 191                 dev->mphy.sband_5g.sband.ht_cap.cap |=
 192                                 IEEE80211_HT_CAP_LDPC_CODING;
 193                 dev->mphy.chainmask = 0x202;
 194                 dev->mphy.antenna_mask = 3;
 195         } else {
 196                 dev->mphy.chainmask = 0x101;
 197                 dev->mphy.antenna_mask = 1;
 198         }
 199
 200         return 0;
 201 }
 202 EXPORT_SYMBOL_GPL(mt76x02_init_device);
 203
 204 void mt76x02_configure_filter(struct ieee80211_hw *hw,
 205                               unsigned int changed_flags,
 206                               unsigned int *total_flags, u64 multicast)
 207 {
 208         struct mt76x02_dev *dev = hw->priv;
 209         u32 flags = 0;
 210
 211 #define MT76_FILTER(_flag, _hw) do { \
 212                 flags |= *total_flags & FIF_##_flag;                    \
 213                 dev->mt76.rxfilter &= ~(_hw);                           \
 214                 dev->mt76.rxfilter |= !(flags & FIF_##_flag) * (_hw);   \
 215         } while (0)
 216
 217         mutex_lock(&dev->mt76.mutex);
 218
 219         dev->mt76.rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;
 220
 221         MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
 222         MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
 223         MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
 224                              MT_RX_FILTR_CFG_CTS |
 225                              MT_RX_FILTR_CFG_CFEND |
 226                              MT_RX_FILTR_CFG_CFACK |
 227                              MT_RX_FILTR_CFG_BA |
 228                              MT_RX_FILTR_CFG_CTRL_RSV);
 229         MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);
 230
 231         *total_flags = flags;
 232         mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
 233
 234         mutex_unlock(&dev->mt76.mutex);
 235 }
 236 EXPORT_SYMBOL_GPL(mt76x02_configure_filter);
 237
 238 int mt76x02_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 239                     struct ieee80211_sta *sta)
 240 {
 241         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 242         struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
 243         struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
 244         int idx = 0;
 245
 246         memset(msta, 0, sizeof(*msta));
 247
 248         idx = mt76_wcid_alloc(dev->mt76.wcid_mask, MT76x02_N_WCIDS);
 249         if (idx < 0)
 250                 return -ENOSPC;
 251
 252         msta->vif = mvif;
 253         msta->wcid.sta = 1;
 254         msta->wcid.idx = idx;
 255         msta->wcid.hw_key_idx = -1;
 256         mt76x02_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
 257         mt76x02_mac_wcid_set_drop(dev, idx, false);
 258         ewma_pktlen_init(&msta->pktlen);
 259
 260         if (vif->type == NL80211_IFTYPE_AP)
 261                 set_bit(MT_WCID_FLAG_CHECK_PS, &msta->wcid.flags);
 262
 263         return 0;
 264 }
 265 EXPORT_SYMBOL_GPL(mt76x02_sta_add);
 266
 267 void mt76x02_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 268                         struct ieee80211_sta *sta)
 269 {
 270         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 271         struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
 272         int idx = wcid->idx;
 273
 274         mt76x02_mac_wcid_set_drop(dev, idx, true);
 275         mt76x02_mac_wcid_setup(dev, idx, 0, NULL);
 276 }
 277 EXPORT_SYMBOL_GPL(mt76x02_sta_remove);
 278
 279 static void
 280 mt76x02_vif_init(struct mt76x02_dev *dev, struct ieee80211_vif *vif,
 281                  unsigned int idx)
 282 {
 283         struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
 284         struct mt76_txq *mtxq;
 285
 286         memset(mvif, 0, sizeof(*mvif));
 287
 288         mvif->idx = idx;
 289         mvif->group_wcid.idx = MT_VIF_WCID(idx);
 290         mvif->group_wcid.hw_key_idx = -1;
 291         mt76_wcid_init(&mvif->group_wcid);
 292
 293         mtxq = (struct mt76_txq *)vif->txq->drv_priv;
 294         rcu_assign_pointer(dev->mt76.wcid[MT_VIF_WCID(idx)], &mvif->group_wcid);
 295         mtxq->wcid = MT_VIF_WCID(idx);
 296 }
 297
 298 int
 299 mt76x02_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 300 {
 301         struct mt76x02_dev *dev = hw->priv;
 302         unsigned int idx = 0;
 303
 304         /* Allow to change address in HW if we create first interface. */
 305         if (!dev->mt76.vif_mask &&
 306             (((vif->addr[0] ^ dev->mphy.macaddr[0]) & ~GENMASK(4, 1)) ||
 307              memcmp(vif->addr + 1, dev->mphy.macaddr + 1, ETH_ALEN - 1)))
 308                 mt76x02_mac_setaddr(dev, vif->addr);
 309
 310         if (vif->addr[0] & BIT(1))
 311                 idx = 1 + (((dev->mphy.macaddr[0] ^ vif->addr[0]) >> 2) & 7);
 312
 313         /*
 314          * Client mode typically only has one configurable BSSID register,
 315          * which is used for bssidx=0. This is linked to the MAC address.
 316          * Since mac80211 allows changing interface types, and we cannot
 317          * force the use of the primary MAC address for a station mode
 318          * interface, we need some other way of configuring a per-interface
 319          * remote BSSID.
 320          * The hardware provides an AP-Client feature, where bssidx 0-7 are
 321          * used for AP mode and bssidx 8-15 for client mode.
 322          * We shift the station interface bss index by 8 to force the
 323          * hardware to recognize the BSSID.
 324          * The resulting bssidx mismatch for unicast frames is ignored by hw.
 325          */
 326         if (vif->type == NL80211_IFTYPE_STATION)
 327                 idx += 8;
 328
 329         /* vif is already set or idx is 8 for AP/Mesh/... */
 330         if (dev->mt76.vif_mask & BIT_ULL(idx) ||
 331             (vif->type != NL80211_IFTYPE_STATION && idx > 7))
 332                 return -EBUSY;
 333
 334         dev->mt76.vif_mask |= BIT_ULL(idx);
 335
 336         mt76x02_vif_init(dev, vif, idx);
 337         return 0;
 338 }
 339 EXPORT_SYMBOL_GPL(mt76x02_add_interface);
 340
 341 void mt76x02_remove_interface(struct ieee80211_hw *hw,
 342                               struct ieee80211_vif *vif)
 343 {
 344         struct mt76x02_dev *dev = hw->priv;
 345         struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
 346
 347         dev->mt76.vif_mask &= ~BIT_ULL(mvif->idx);
 348         rcu_assign_pointer(dev->mt76.wcid[mvif->group_wcid.idx], NULL);
 349         mt76_wcid_cleanup(&dev->mt76, &mvif->group_wcid);
 350 }
 351 EXPORT_SYMBOL_GPL(mt76x02_remove_interface);
 352
 353 int mt76x02_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 354                          struct ieee80211_ampdu_params *params)
 355 {
 356         enum ieee80211_ampdu_mlme_action action = params->action;
 357         struct ieee80211_sta *sta = params->sta;
 358         struct mt76x02_dev *dev = hw->priv;
 359         struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
 360         struct ieee80211_txq *txq = sta->txq[params->tid];
 361         u16 tid = params->tid;
 362         u16 ssn = params->ssn;
 363         struct mt76_txq *mtxq;
 364         int ret = 0;
 365
 366         if (!txq)
 367                 return -EINVAL;
 368
 369         mtxq = (struct mt76_txq *)txq->drv_priv;
 370
 371         mutex_lock(&dev->mt76.mutex);
 372         switch (action) {
 373         case IEEE80211_AMPDU_RX_START:
 374                 mt76_rx_aggr_start(&dev->mt76, &msta->wcid, tid,
 375                                    ssn, params->buf_size);
 376                 mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
 377                 break;
 378         case IEEE80211_AMPDU_RX_STOP:
 379                 mt76_rx_aggr_stop(&dev->mt76, &msta->wcid, tid);
 380                 mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4,
 381                            BIT(16 + tid));
 382                 break;
 383         case IEEE80211_AMPDU_TX_OPERATIONAL:
 384                 mtxq->aggr = true;
 385                 mtxq->send_bar = false;
 386                 ieee80211_send_bar(vif, sta->addr, tid, mtxq->agg_ssn);
 387                 break;
 388         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 389         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 390                 mtxq->aggr = false;
 391                 break;
 392         case IEEE80211_AMPDU_TX_START:
 393                 mtxq->agg_ssn = IEEE80211_SN_TO_SEQ(ssn);
 394                 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
 395                 break;
 396         case IEEE80211_AMPDU_TX_STOP_CONT:
 397                 mtxq->aggr = false;
 398                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 399                 break;
 400         }
 401         mutex_unlock(&dev->mt76.mutex);
 402
 403         return ret;
 404 }
 405 EXPORT_SYMBOL_GPL(mt76x02_ampdu_action);
 406
 407 int mt76x02_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 408                     struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 409                     struct ieee80211_key_conf *key)
 410 {
 411         struct mt76x02_dev *dev = hw->priv;
 412         struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
 413         struct mt76x02_sta *msta;
 414         struct mt76_wcid *wcid;
 415         int idx = key->keyidx;
 416         int ret;
 417
 418         /* fall back to sw encryption for unsupported ciphers */
 419         switch (key->cipher) {
 420         case WLAN_CIPHER_SUITE_WEP40:
 421         case WLAN_CIPHER_SUITE_WEP104:
 422         case WLAN_CIPHER_SUITE_TKIP:
 423         case WLAN_CIPHER_SUITE_CCMP:
 424                 break;
 425         default:
 426                 return -EOPNOTSUPP;
 427         }
 428
 429         /*
 430          * The hardware does not support per-STA RX GTK, fall back
 431          * to software mode for these.
 432          */
 433         if ((vif->type == NL80211_IFTYPE_ADHOC ||
 434              vif->type == NL80211_IFTYPE_MESH_POINT) &&
 435             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
 436              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
 437             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
 438                 return -EOPNOTSUPP;
 439
 440         /*
 441          * In USB AP mode, broadcast/multicast frames are setup in beacon
 442          * data registers and sent via HW beacons engine, they require to
 443          * be already encrypted.
 444          */
 445         if (mt76_is_usb(&dev->mt76) &&
 446             vif->type == NL80211_IFTYPE_AP &&
 447             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
 448                 return -EOPNOTSUPP;
 449
 450         /* MT76x0 GTK offloading does not work with more than one VIF */
 451         if (is_mt76x0(dev) && !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
 452                 return -EOPNOTSUPP;
 453
 454         msta = sta ? (struct mt76x02_sta *)sta->drv_priv : NULL;
 455         wcid = msta ? &msta->wcid : &mvif->group_wcid;
 456
 457         if (cmd != SET_KEY) {
 458                 if (idx == wcid->hw_key_idx) {
 459                         wcid->hw_key_idx = -1;
 460                         wcid->sw_iv = false;
 461                 }
 462
 463                 return 0;
 464         }
 465
 466         key->hw_key_idx = wcid->idx;
 467         wcid->hw_key_idx = idx;
 468         if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {
 469                 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
 470                 wcid->sw_iv = true;
 471         }
 472         mt76_wcid_key_setup(&dev->mt76, wcid, key);
 473
 474         if (!msta) {
 475                 if (key || wcid->hw_key_idx == idx) {
 476                         ret = mt76x02_mac_wcid_set_key(dev, wcid->idx, key);
 477                         if (ret)
 478                                 return ret;
 479                 }
 480
 481                 return mt76x02_mac_shared_key_setup(dev, mvif->idx, idx, key);
 482         }
 483
 484         return mt76x02_mac_wcid_set_key(dev, msta->wcid.idx, key);
 485 }
 486 EXPORT_SYMBOL_GPL(mt76x02_set_key);
 487
 488 int mt76x02_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 489                     unsigned int link_id, u16 queue,
 490                     const struct ieee80211_tx_queue_params *params)
 491 {
 492         struct mt76x02_dev *dev = hw->priv;
 493         u8 cw_min = 5, cw_max = 10, qid;
 494         u32 val;
 495
 496         qid = dev->mphy.q_tx[queue]->hw_idx;
 497
 498         if (params->cw_min)
 499                 cw_min = fls(params->cw_min);
 500         if (params->cw_max)
 501                 cw_max = fls(params->cw_max);
 502
 503         val = FIELD_PREP(MT_EDCA_CFG_TXOP, params->txop) |
 504               FIELD_PREP(MT_EDCA_CFG_AIFSN, params->aifs) |
 505               FIELD_PREP(MT_EDCA_CFG_CWMIN, cw_min) |
 506               FIELD_PREP(MT_EDCA_CFG_CWMAX, cw_max);
 507         mt76_wr(dev, MT_EDCA_CFG_AC(qid), val);
 508
 509         val = mt76_rr(dev, MT_WMM_TXOP(qid));
 510         val &= ~(MT_WMM_TXOP_MASK << MT_WMM_TXOP_SHIFT(qid));
 511         val |= params->txop << MT_WMM_TXOP_SHIFT(qid);
 512         mt76_wr(dev, MT_WMM_TXOP(qid), val);
 513
 514         val = mt76_rr(dev, MT_WMM_AIFSN);
 515         val &= ~(MT_WMM_AIFSN_MASK << MT_WMM_AIFSN_SHIFT(qid));
 516         val |= params->aifs << MT_WMM_AIFSN_SHIFT(qid);
 517         mt76_wr(dev, MT_WMM_AIFSN, val);
 518
 519         val = mt76_rr(dev, MT_WMM_CWMIN);
 520         val &= ~(MT_WMM_CWMIN_MASK << MT_WMM_CWMIN_SHIFT(qid));
 521         val |= cw_min << MT_WMM_CWMIN_SHIFT(qid);
 522         mt76_wr(dev, MT_WMM_CWMIN, val);
 523
 524         val = mt76_rr(dev, MT_WMM_CWMAX);
 525         val &= ~(MT_WMM_CWMAX_MASK << MT_WMM_CWMAX_SHIFT(qid));
 526         val |= cw_max << MT_WMM_CWMAX_SHIFT(qid);
 527         mt76_wr(dev, MT_WMM_CWMAX, val);
 528
 529         return 0;
 530 }
 531 EXPORT_SYMBOL_GPL(mt76x02_conf_tx);
 532
 533 void mt76x02_set_tx_ackto(struct mt76x02_dev *dev)
 534 {
 535         u8 ackto, sifs, slottime = dev->slottime;
 536
 537         /* As defined by IEEE 802.11-2007 17.3.8.6 */
 538         slottime += 3 * dev->coverage_class;
 539         mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
 540                        MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
 541
 542         sifs = mt76_get_field(dev, MT_XIFS_TIME_CFG,
 543                               MT_XIFS_TIME_CFG_OFDM_SIFS);
 544
 545         ackto = slottime + sifs;
 546         mt76_rmw_field(dev, MT_TX_TIMEOUT_CFG,
 547                        MT_TX_TIMEOUT_CFG_ACKTO, ackto);
 548 }
 549 EXPORT_SYMBOL_GPL(mt76x02_set_tx_ackto);
 550
 551 void mt76x02_set_coverage_class(struct ieee80211_hw *hw,
 552                                 s16 coverage_class)
 553 {
 554         struct mt76x02_dev *dev = hw->priv;
 555
 556         mutex_lock(&dev->mt76.mutex);
 557         dev->coverage_class = max_t(s16, coverage_class, 0);
 558         mt76x02_set_tx_ackto(dev);
 559         mutex_unlock(&dev->mt76.mutex);
 560 }
 561 EXPORT_SYMBOL_GPL(mt76x02_set_coverage_class);
 562
 563 int mt76x02_set_rts_threshold(struct ieee80211_hw *hw, u32 val)
 564 {
 565         struct mt76x02_dev *dev = hw->priv;
 566
 567         if (val != ~0 && val > 0xffff)
 568                 return -EINVAL;
 569
 570         mutex_lock(&dev->mt76.mutex);
 571         mt76x02_mac_set_rts_thresh(dev, val);
 572         mutex_unlock(&dev->mt76.mutex);
 573
 574         return 0;
 575 }
 576 EXPORT_SYMBOL_GPL(mt76x02_set_rts_threshold);
 577
 578 void mt76x02_sta_rate_tbl_update(struct ieee80211_hw *hw,
 579                                  struct ieee80211_vif *vif,
 580                                  struct ieee80211_sta *sta)
 581 {
 582         struct mt76x02_dev *dev = hw->priv;
 583         struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
 584         struct ieee80211_sta_rates *rates = rcu_dereference(sta->rates);
 585         struct ieee80211_tx_rate rate = {};
 586
 587         if (!rates)
 588                 return;
 589
 590         rate.idx = rates->rate[0].idx;
 591         rate.flags = rates->rate[0].flags;
 592         mt76x02_mac_wcid_set_rate(dev, &msta->wcid, &rate);
 593 }
 594 EXPORT_SYMBOL_GPL(mt76x02_sta_rate_tbl_update);
 595
 596 void mt76x02_remove_hdr_pad(struct sk_buff *skb, int len)
 597 {
 598         int hdrlen;
 599
 600         if (!len)
 601                 return;
 602
 603         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 604         memmove(skb->data + len, skb->data, hdrlen);
 605         skb_pull(skb, len);
 606 }
 607 EXPORT_SYMBOL_GPL(mt76x02_remove_hdr_pad);
 608
 609 void mt76x02_sw_scan_complete(struct ieee80211_hw *hw,
 610                               struct ieee80211_vif *vif)
 611 {
 612         struct mt76x02_dev *dev = hw->priv;
 613
 614         clear_bit(MT76_SCANNING, &dev->mphy.state);
 615         if (dev->cal.gain_init_done) {
 616                 /* Restore AGC gain and resume calibration after scanning. */
 617                 dev->cal.low_gain = -1;
 618                 ieee80211_queue_delayed_work(hw, &dev->cal_work, 0);
 619         }
 620 }
 621 EXPORT_SYMBOL_GPL(mt76x02_sw_scan_complete);
 622
 623 void mt76x02_sta_ps(struct mt76_dev *mdev, struct ieee80211_sta *sta,
 624                     bool ps)
 625 {
 626         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 627         struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
 628         int idx = msta->wcid.idx;
 629
 630         mt76_stop_tx_queues(&dev->mphy, sta, true);
 631         if (mt76_is_mmio(mdev))
 632                 mt76x02_mac_wcid_set_drop(dev, idx, ps);
 633 }
 634 EXPORT_SYMBOL_GPL(mt76x02_sta_ps);
 635
 636 void mt76x02_bss_info_changed(struct ieee80211_hw *hw,
 637                               struct ieee80211_vif *vif,
 638                               struct ieee80211_bss_conf *info,
 639                               u64 changed)
 640 {
 641         struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
 642         struct mt76x02_dev *dev = hw->priv;
 643
 644         mutex_lock(&dev->mt76.mutex);
 645
 646         if (changed & BSS_CHANGED_BSSID)
 647                 mt76x02_mac_set_bssid(dev, mvif->idx, info->bssid);
 648
 649         if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
 650                 mt76x02_mac_set_tx_protection(dev, info->use_cts_prot,
 651                                               info->ht_operation_mode);
 652
 653         if (changed & BSS_CHANGED_BEACON_INT) {
 654                 mt76_rmw_field(dev, MT_BEACON_TIME_CFG,
 655                                MT_BEACON_TIME_CFG_INTVAL,
 656                                info->beacon_int << 4);
 657                 dev->mt76.beacon_int = info->beacon_int;
 658         }
 659
 660         if (changed & BSS_CHANGED_BEACON_ENABLED)
 661                 mt76x02_mac_set_beacon_enable(dev, vif, info->enable_beacon);
 662
 663         if (changed & BSS_CHANGED_ERP_PREAMBLE)
 664                 mt76x02_mac_set_short_preamble(dev, info->use_short_preamble);
 665
 666         if (changed & BSS_CHANGED_ERP_SLOT) {
 667                 int slottime = info->use_short_slot ? 9 : 20;
 668
 669                 dev->slottime = slottime;
 670                 mt76x02_set_tx_ackto(dev);
 671         }
 672
 673         mutex_unlock(&dev->mt76.mutex);
 674 }
 675 EXPORT_SYMBOL_GPL(mt76x02_bss_info_changed);
 676
 677 void mt76x02_config_mac_addr_list(struct mt76x02_dev *dev)
 678 {
 679         struct ieee80211_hw *hw = mt76_hw(dev);
 680         struct wiphy *wiphy = hw->wiphy;
 681         int i;
 682
 683         for (i = 0; i < ARRAY_SIZE(dev->macaddr_list); i++) {
 684                 u8 *addr = dev->macaddr_list[i].addr;
 685
 686                 memcpy(addr, dev->mphy.macaddr, ETH_ALEN);
 687
 688                 if (!i)
 689                         continue;
 690
 691                 addr[0] |= BIT(1);
 692                 addr[0] ^= ((i - 1) << 2);
 693         }
 694         wiphy->addresses = dev->macaddr_list;
 695         wiphy->n_addresses = ARRAY_SIZE(dev->macaddr_list);
 696 }
 697 EXPORT_SYMBOL_GPL(mt76x02_config_mac_addr_list);
 698
 699 MODULE_DESCRIPTION("MediaTek MT76x02 helpers");
 700 MODULE_LICENSE("Dual BSD/GPL");