drivers/net/wireless/mediatek/mt76/mt7615/main.c

   1 // SPDX-License-Identifier: ISC
   2 /* Copyright (C) 2019 MediaTek Inc.
   3  *
   4  * Author: Roy Luo <royluo@google.com>
   5  *         Ryder Lee <ryder.lee@mediatek.com>
   6  *         Felix Fietkau <nbd@nbd.name>
   7  */
   8
   9 #include <linux/etherdevice.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/pci.h>
  12 #include <linux/module.h>
  13 #include "mt7615.h"
  14
  15 static int mt7615_start(struct ieee80211_hw *hw)
  16 {
  17         struct mt7615_dev *dev = hw->priv;
  18
  19         mt7615_mac_reset_counters(dev);
  20
  21         dev->mt76.survey_time = ktime_get_boottime();
  22         set_bit(MT76_STATE_RUNNING, &dev->mt76.state);
  23         ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
  24                                      MT7615_WATCHDOG_TIME);
  25
  26         return 0;
  27 }
  28
  29 static void mt7615_stop(struct ieee80211_hw *hw)
  30 {
  31         struct mt7615_dev *dev = hw->priv;
  32
  33         clear_bit(MT76_STATE_RUNNING, &dev->mt76.state);
  34         cancel_delayed_work_sync(&dev->mt76.mac_work);
  35 }
  36
  37 static int get_omac_idx(enum nl80211_iftype type, u32 mask)
  38 {
  39         int i;
  40
  41         switch (type) {
  42         case NL80211_IFTYPE_AP:
  43         case NL80211_IFTYPE_MESH_POINT:
  44         case NL80211_IFTYPE_ADHOC:
  45                 /* ap use hw bssid 0 and ext bssid */
  46                 if (~mask & BIT(HW_BSSID_0))
  47                         return HW_BSSID_0;
  48
  49                 for (i = EXT_BSSID_1; i < EXT_BSSID_END; i++)
  50                         if (~mask & BIT(i))
  51                                 return i;
  52
  53                 break;
  54         case NL80211_IFTYPE_STATION:
  55                 /* sta use hw bssid other than 0 */
  56                 for (i = HW_BSSID_1; i < HW_BSSID_MAX; i++)
  57                         if (~mask & BIT(i))
  58                                 return i;
  59
  60                 break;
  61         default:
  62                 WARN_ON(1);
  63                 break;
  64         }
  65
  66         return -1;
  67 }
  68
  69 static int mt7615_add_interface(struct ieee80211_hw *hw,
  70                                 struct ieee80211_vif *vif)
  71 {
  72         struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
  73         struct mt7615_dev *dev = hw->priv;
  74         struct mt76_txq *mtxq;
  75         int idx, ret = 0;
  76
  77         mutex_lock(&dev->mt76.mutex);
  78
  79         mvif->idx = ffs(~dev->vif_mask) - 1;
  80         if (mvif->idx >= MT7615_MAX_INTERFACES) {
  81                 ret = -ENOSPC;
  82                 goto out;
  83         }
  84
  85         idx = get_omac_idx(vif->type, dev->omac_mask);
  86         if (idx < 0) {
  87                 ret = -ENOSPC;
  88                 goto out;
  89         }
  90         mvif->omac_idx = idx;
  91
  92         /* TODO: DBDC support. Use band 0 for now */
  93         mvif->band_idx = 0;
  94         mvif->wmm_idx = mvif->idx % MT7615_MAX_WMM_SETS;
  95
  96         ret = mt7615_mcu_set_dev_info(dev, vif, 1);
  97         if (ret)
  98                 goto out;
  99
 100         dev->vif_mask |= BIT(mvif->idx);
 101         dev->omac_mask |= BIT(mvif->omac_idx);
 102         idx = MT7615_WTBL_RESERVED - mvif->idx;
 103
 104         INIT_LIST_HEAD(&mvif->sta.poll_list);
 105         mvif->sta.wcid.idx = idx;
 106         mvif->sta.wcid.hw_key_idx = -1;
 107         mt7615_mac_wtbl_update(dev, idx,
 108                                MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
 109
 110         rcu_assign_pointer(dev->mt76.wcid[idx], &mvif->sta.wcid);
 111         mtxq = (struct mt76_txq *)vif->txq->drv_priv;
 112         mtxq->wcid = &mvif->sta.wcid;
 113         mt76_txq_init(&dev->mt76, vif->txq);
 114
 115 out:
 116         mutex_unlock(&dev->mt76.mutex);
 117
 118         return ret;
 119 }
 120
 121 static void mt7615_remove_interface(struct ieee80211_hw *hw,
 122                                     struct ieee80211_vif *vif)
 123 {
 124         struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
 125         struct mt7615_sta *msta = &mvif->sta;
 126         struct mt7615_dev *dev = hw->priv;
 127         int idx = msta->wcid.idx;
 128
 129         /* TODO: disable beacon for the bss */
 130
 131         mt7615_mcu_set_dev_info(dev, vif, 0);
 132
 133         rcu_assign_pointer(dev->mt76.wcid[idx], NULL);
 134         mt76_txq_remove(&dev->mt76, vif->txq);
 135
 136         mutex_lock(&dev->mt76.mutex);
 137         dev->vif_mask &= ~BIT(mvif->idx);
 138         dev->omac_mask &= ~BIT(mvif->omac_idx);
 139         mutex_unlock(&dev->mt76.mutex);
 140
 141         spin_lock_bh(&dev->sta_poll_lock);
 142         if (!list_empty(&msta->poll_list))
 143                 list_del_init(&msta->poll_list);
 144         spin_unlock_bh(&dev->sta_poll_lock);
 145 }
 146
 147 static int mt7615_set_channel(struct mt7615_dev *dev)
 148 {
 149         int ret;
 150
 151         cancel_delayed_work_sync(&dev->mt76.mac_work);
 152
 153         mutex_lock(&dev->mt76.mutex);
 154         set_bit(MT76_RESET, &dev->mt76.state);
 155
 156         mt7615_dfs_check_channel(dev);
 157
 158         mt76_set_channel(&dev->mt76);
 159
 160         ret = mt7615_mcu_set_channel(dev);
 161         if (ret)
 162                 goto out;
 163
 164         ret = mt7615_dfs_init_radar_detector(dev);
 165         mt7615_mac_cca_stats_reset(dev);
 166         dev->mt76.survey_time = ktime_get_boottime();
 167
 168         mt7615_mac_reset_counters(dev);
 169
 170 out:
 171         clear_bit(MT76_RESET, &dev->mt76.state);
 172         mutex_unlock(&dev->mt76.mutex);
 173
 174         mt76_txq_schedule_all(&dev->mt76);
 175         ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
 176                                      MT7615_WATCHDOG_TIME);
 177         return ret;
 178 }
 179
 180 static int mt7615_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 181                           struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 182                           struct ieee80211_key_conf *key)
 183 {
 184         struct mt7615_dev *dev = hw->priv;
 185         struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
 186         struct mt7615_sta *msta = sta ? (struct mt7615_sta *)sta->drv_priv :
 187                                   &mvif->sta;
 188         struct mt76_wcid *wcid = &msta->wcid;
 189         int idx = key->keyidx;
 190
 191         /* The hardware does not support per-STA RX GTK, fallback
 192          * to software mode for these.
 193          */
 194         if ((vif->type == NL80211_IFTYPE_ADHOC ||
 195              vif->type == NL80211_IFTYPE_MESH_POINT) &&
 196             (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
 197              key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
 198             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
 199                 return -EOPNOTSUPP;
 200
 201         /* fall back to sw encryption for unsupported ciphers */
 202         switch (key->cipher) {
 203         case WLAN_CIPHER_SUITE_AES_CMAC:
 204                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIE;
 205                 break;
 206         case WLAN_CIPHER_SUITE_WEP40:
 207         case WLAN_CIPHER_SUITE_WEP104:
 208         case WLAN_CIPHER_SUITE_TKIP:
 209         case WLAN_CIPHER_SUITE_CCMP:
 210         case WLAN_CIPHER_SUITE_CCMP_256:
 211         case WLAN_CIPHER_SUITE_GCMP:
 212         case WLAN_CIPHER_SUITE_GCMP_256:
 213         case WLAN_CIPHER_SUITE_SMS4:
 214                 break;
 215         default:
 216                 return -EOPNOTSUPP;
 217         }
 218
 219         if (cmd == SET_KEY) {
 220                 key->hw_key_idx = wcid->idx;
 221                 wcid->hw_key_idx = idx;
 222         } else if (idx == wcid->hw_key_idx) {
 223                 wcid->hw_key_idx = -1;
 224         }
 225         mt76_wcid_key_setup(&dev->mt76, wcid,
 226                             cmd == SET_KEY ? key : NULL);
 227
 228         return mt7615_mac_wtbl_set_key(dev, wcid, key, cmd);
 229 }
 230
 231 static int mt7615_config(struct ieee80211_hw *hw, u32 changed)
 232 {
 233         struct mt7615_dev *dev = hw->priv;
 234         int ret = 0;
 235
 236         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 237                 ieee80211_stop_queues(hw);
 238                 ret = mt7615_set_channel(dev);
 239                 ieee80211_wake_queues(hw);
 240         }
 241
 242         mutex_lock(&dev->mt76.mutex);
 243
 244         if (changed & IEEE80211_CONF_CHANGE_POWER)
 245                 ret = mt7615_mcu_set_tx_power(dev);
 246
 247         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 248                 if (!(hw->conf.flags & IEEE80211_CONF_MONITOR))
 249                         dev->mt76.rxfilter |= MT_WF_RFCR_DROP_OTHER_UC;
 250                 else
 251                         dev->mt76.rxfilter &= ~MT_WF_RFCR_DROP_OTHER_UC;
 252
 253                 mt76_wr(dev, MT_WF_RFCR, dev->mt76.rxfilter);
 254         }
 255
 256         mutex_unlock(&dev->mt76.mutex);
 257
 258         return ret;
 259 }
 260
 261 static int
 262 mt7615_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
 263                const struct ieee80211_tx_queue_params *params)
 264 {
 265         struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
 266         struct mt7615_dev *dev = hw->priv;
 267
 268         queue += mvif->wmm_idx * MT7615_MAX_WMM_SETS;
 269
 270         return mt7615_mcu_set_wmm(dev, queue, params);
 271 }
 272
 273 static void mt7615_configure_filter(struct ieee80211_hw *hw,
 274                                     unsigned int changed_flags,
 275                                     unsigned int *total_flags,
 276                                     u64 multicast)
 277 {
 278         struct mt7615_dev *dev = hw->priv;
 279         u32 ctl_flags = MT_WF_RFCR1_DROP_ACK |
 280                         MT_WF_RFCR1_DROP_BF_POLL |
 281                         MT_WF_RFCR1_DROP_BA |
 282                         MT_WF_RFCR1_DROP_CFEND |
 283                         MT_WF_RFCR1_DROP_CFACK;
 284         u32 flags = 0;
 285
 286 #define MT76_FILTER(_flag, _hw) do { \
 287                 flags |= *total_flags & FIF_##_flag;                    \
 288                 dev->mt76.rxfilter &= ~(_hw);                           \
 289                 dev->mt76.rxfilter |= !(flags & FIF_##_flag) * (_hw);   \
 290         } while (0)
 291
 292         dev->mt76.rxfilter &= ~(MT_WF_RFCR_DROP_OTHER_BSS |
 293                                 MT_WF_RFCR_DROP_OTHER_BEACON |
 294                                 MT_WF_RFCR_DROP_FRAME_REPORT |
 295                                 MT_WF_RFCR_DROP_PROBEREQ |
 296                                 MT_WF_RFCR_DROP_MCAST_FILTERED |
 297                                 MT_WF_RFCR_DROP_MCAST |
 298                                 MT_WF_RFCR_DROP_BCAST |
 299                                 MT_WF_RFCR_DROP_DUPLICATE |
 300                                 MT_WF_RFCR_DROP_A2_BSSID |
 301                                 MT_WF_RFCR_DROP_UNWANTED_CTL |
 302                                 MT_WF_RFCR_DROP_STBC_MULTI);
 303
 304         MT76_FILTER(OTHER_BSS, MT_WF_RFCR_DROP_OTHER_TIM |
 305                                MT_WF_RFCR_DROP_A3_MAC |
 306                                MT_WF_RFCR_DROP_A3_BSSID);
 307
 308         MT76_FILTER(FCSFAIL, MT_WF_RFCR_DROP_FCSFAIL);
 309
 310         MT76_FILTER(CONTROL, MT_WF_RFCR_DROP_CTS |
 311                              MT_WF_RFCR_DROP_RTS |
 312                              MT_WF_RFCR_DROP_CTL_RSV |
 313                              MT_WF_RFCR_DROP_NDPA);
 314
 315         *total_flags = flags;
 316         mt76_wr(dev, MT_WF_RFCR, dev->mt76.rxfilter);
 317
 318         if (*total_flags & FIF_CONTROL)
 319                 mt76_clear(dev, MT_WF_RFCR1, ctl_flags);
 320         else
 321                 mt76_set(dev, MT_WF_RFCR1, ctl_flags);
 322 }
 323
 324 static void mt7615_bss_info_changed(struct ieee80211_hw *hw,
 325                                     struct ieee80211_vif *vif,
 326                                     struct ieee80211_bss_conf *info,
 327                                     u32 changed)
 328 {
 329         struct mt7615_dev *dev = hw->priv;
 330
 331         mutex_lock(&dev->mt76.mutex);
 332
 333         if (changed & BSS_CHANGED_ASSOC)
 334                 mt7615_mcu_set_bss_info(dev, vif, info->assoc);
 335
 336         /* TODO: update beacon content
 337          * BSS_CHANGED_BEACON
 338          */
 339
 340         if (changed & BSS_CHANGED_BEACON_ENABLED) {
 341                 mt7615_mcu_set_bss_info(dev, vif, info->enable_beacon);
 342                 mt7615_mcu_wtbl_bmc(dev, vif, info->enable_beacon);
 343                 mt7615_mcu_set_sta_rec_bmc(dev, vif, info->enable_beacon);
 344                 mt7615_mcu_set_bcn(dev, vif, info->enable_beacon);
 345         }
 346
 347         mutex_unlock(&dev->mt76.mutex);
 348 }
 349
 350 static void
 351 mt7615_channel_switch_beacon(struct ieee80211_hw *hw,
 352                              struct ieee80211_vif *vif,
 353                              struct cfg80211_chan_def *chandef)
 354 {
 355         struct mt7615_dev *dev = hw->priv;
 356
 357         mutex_lock(&dev->mt76.mutex);
 358         mt7615_mcu_set_bcn(dev, vif, true);
 359         mutex_unlock(&dev->mt76.mutex);
 360 }
 361
 362 int mt7615_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 363                    struct ieee80211_sta *sta)
 364 {
 365         struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
 366         struct mt7615_sta *msta = (struct mt7615_sta *)sta->drv_priv;
 367         struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
 368         int idx;
 369
 370         idx = mt76_wcid_alloc(dev->mt76.wcid_mask, MT7615_WTBL_STA - 1);
 371         if (idx < 0)
 372                 return -ENOSPC;
 373
 374         INIT_LIST_HEAD(&msta->poll_list);
 375         msta->vif = mvif;
 376         msta->wcid.sta = 1;
 377         msta->wcid.idx = idx;
 378         mt7615_mac_wtbl_update(dev, idx,
 379                                MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
 380
 381         mt7615_mcu_add_wtbl(dev, vif, sta);
 382         mt7615_mcu_set_sta_rec(dev, vif, sta, 1);
 383
 384         return 0;
 385 }
 386
 387 void mt7615_sta_assoc(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 388                       struct ieee80211_sta *sta)
 389 {
 390         struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
 391
 392         if (sta->ht_cap.ht_supported)
 393                 mt7615_mcu_set_ht_cap(dev, vif, sta);
 394 }
 395
 396 void mt7615_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 397                        struct ieee80211_sta *sta)
 398 {
 399         struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
 400         struct mt7615_sta *msta = (struct mt7615_sta *)sta->drv_priv;
 401
 402         mt7615_mcu_set_sta_rec(dev, vif, sta, 0);
 403         mt7615_mcu_del_wtbl(dev, sta);
 404
 405         mt7615_mac_wtbl_update(dev, msta->wcid.idx,
 406                                MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
 407
 408         spin_lock_bh(&dev->sta_poll_lock);
 409         if (!list_empty(&msta->poll_list))
 410                 list_del_init(&msta->poll_list);
 411         spin_unlock_bh(&dev->sta_poll_lock);
 412 }
 413
 414 static void mt7615_sta_rate_tbl_update(struct ieee80211_hw *hw,
 415                                        struct ieee80211_vif *vif,
 416                                        struct ieee80211_sta *sta)
 417 {
 418         struct mt7615_dev *dev = hw->priv;
 419         struct mt7615_sta *msta = (struct mt7615_sta *)sta->drv_priv;
 420         struct ieee80211_sta_rates *sta_rates = rcu_dereference(sta->rates);
 421         int i;
 422
 423         spin_lock_bh(&dev->mt76.lock);
 424         for (i = 0; i < ARRAY_SIZE(msta->rates); i++) {
 425                 msta->rates[i].idx = sta_rates->rate[i].idx;
 426                 msta->rates[i].count = sta_rates->rate[i].count;
 427                 msta->rates[i].flags = sta_rates->rate[i].flags;
 428
 429                 if (msta->rates[i].idx < 0 || !msta->rates[i].count)
 430                         break;
 431         }
 432         msta->n_rates = i;
 433         mt7615_mac_set_rates(dev, msta, NULL, msta->rates);
 434         msta->rate_probe = false;
 435         spin_unlock_bh(&dev->mt76.lock);
 436 }
 437
 438 static void mt7615_tx(struct ieee80211_hw *hw,
 439                       struct ieee80211_tx_control *control,
 440                       struct sk_buff *skb)
 441 {
 442         struct mt7615_dev *dev = hw->priv;
 443         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 444         struct ieee80211_vif *vif = info->control.vif;
 445         struct mt76_wcid *wcid = &dev->mt76.global_wcid;
 446
 447         if (control->sta) {
 448                 struct mt7615_sta *sta;
 449
 450                 sta = (struct mt7615_sta *)control->sta->drv_priv;
 451                 wcid = &sta->wcid;
 452         }
 453
 454         if (vif && !control->sta) {
 455                 struct mt7615_vif *mvif;
 456
 457                 mvif = (struct mt7615_vif *)vif->drv_priv;
 458                 wcid = &mvif->sta.wcid;
 459         }
 460
 461         mt76_tx(&dev->mt76, control->sta, wcid, skb);
 462 }
 463
 464 static int mt7615_set_rts_threshold(struct ieee80211_hw *hw, u32 val)
 465 {
 466         struct mt7615_dev *dev = hw->priv;
 467
 468         mutex_lock(&dev->mt76.mutex);
 469         mt7615_mcu_set_rts_thresh(dev, val);
 470         mutex_unlock(&dev->mt76.mutex);
 471
 472         return 0;
 473 }
 474
 475 static int
 476 mt7615_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 477                     struct ieee80211_ampdu_params *params)
 478 {
 479         enum ieee80211_ampdu_mlme_action action = params->action;
 480         struct mt7615_dev *dev = hw->priv;
 481         struct ieee80211_sta *sta = params->sta;
 482         struct ieee80211_txq *txq = sta->txq[params->tid];
 483         struct mt7615_sta *msta = (struct mt7615_sta *)sta->drv_priv;
 484         u16 tid = params->tid;
 485         u16 ssn = params->ssn;
 486         struct mt76_txq *mtxq;
 487         int ret = 0;
 488
 489         if (!txq)
 490                 return -EINVAL;
 491
 492         mtxq = (struct mt76_txq *)txq->drv_priv;
 493
 494         mutex_lock(&dev->mt76.mutex);
 495         switch (action) {
 496         case IEEE80211_AMPDU_RX_START:
 497                 mt76_rx_aggr_start(&dev->mt76, &msta->wcid, tid, ssn,
 498                                    params->buf_size);
 499                 mt7615_mcu_set_rx_ba(dev, params, 1);
 500                 break;
 501         case IEEE80211_AMPDU_RX_STOP:
 502                 mt76_rx_aggr_stop(&dev->mt76, &msta->wcid, tid);
 503                 mt7615_mcu_set_rx_ba(dev, params, 0);
 504                 break;
 505         case IEEE80211_AMPDU_TX_OPERATIONAL:
 506                 mtxq->aggr = true;
 507                 mtxq->send_bar = false;
 508                 mt7615_mcu_set_tx_ba(dev, params, 1);
 509                 break;
 510         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 511         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 512                 mtxq->aggr = false;
 513                 mt7615_mcu_set_tx_ba(dev, params, 0);
 514                 break;
 515         case IEEE80211_AMPDU_TX_START:
 516                 mtxq->agg_ssn = IEEE80211_SN_TO_SEQ(ssn);
 517                 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
 518                 break;
 519         case IEEE80211_AMPDU_TX_STOP_CONT:
 520                 mtxq->aggr = false;
 521                 mt7615_mcu_set_tx_ba(dev, params, 0);
 522                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
 523                 break;
 524         }
 525         mutex_unlock(&dev->mt76.mutex);
 526
 527         return ret;
 528 }
 529
 530 const struct ieee80211_ops mt7615_ops = {
 531         .tx = mt7615_tx,
 532         .start = mt7615_start,
 533         .stop = mt7615_stop,
 534         .add_interface = mt7615_add_interface,
 535         .remove_interface = mt7615_remove_interface,
 536         .config = mt7615_config,
 537         .conf_tx = mt7615_conf_tx,
 538         .configure_filter = mt7615_configure_filter,
 539         .bss_info_changed = mt7615_bss_info_changed,
 540         .sta_state = mt76_sta_state,
 541         .set_key = mt7615_set_key,
 542         .ampdu_action = mt7615_ampdu_action,
 543         .set_rts_threshold = mt7615_set_rts_threshold,
 544         .wake_tx_queue = mt76_wake_tx_queue,
 545         .sta_rate_tbl_update = mt7615_sta_rate_tbl_update,
 546         .sw_scan_start = mt76_sw_scan,
 547         .sw_scan_complete = mt76_sw_scan_complete,
 548         .release_buffered_frames = mt76_release_buffered_frames,
 549         .get_txpower = mt76_get_txpower,
 550         .channel_switch_beacon = mt7615_channel_switch_beacon,
 551         .get_survey = mt76_get_survey,
 552         .get_antenna = mt76_get_antenna,
 553 };