drivers/net/wireless/mediatek/mt7601u/mac.c

   1 /*
   2  * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include "mt7601u.h"
  16 #include "trace.h"
  17 #include <linux/etherdevice.h>
  18
  19 static void
  20 mt76_mac_process_tx_rate(struct ieee80211_tx_rate *txrate, u16 rate)
  21 {
  22         u8 idx = FIELD_GET(MT_TXWI_RATE_MCS, rate);
  23
  24         txrate->idx = 0;
  25         txrate->flags = 0;
  26         txrate->count = 1;
  27
  28         switch (FIELD_GET(MT_TXWI_RATE_PHY_MODE, rate)) {
  29         case MT_PHY_TYPE_OFDM:
  30                 txrate->idx = idx + 4;
  31                 return;
  32         case MT_PHY_TYPE_CCK:
  33                 if (idx >= 8)
  34                         idx -= 8;
  35
  36                 txrate->idx = idx;
  37                 return;
  38         case MT_PHY_TYPE_HT_GF:
  39                 txrate->flags |= IEEE80211_TX_RC_GREEN_FIELD;
  40                 /* fall through */
  41         case MT_PHY_TYPE_HT:
  42                 txrate->flags |= IEEE80211_TX_RC_MCS;
  43                 txrate->idx = idx;
  44                 break;
  45         default:
  46                 WARN_ON(1);
  47                 return;
  48         }
  49
  50         if (FIELD_GET(MT_TXWI_RATE_BW, rate) == MT_PHY_BW_40)
  51                 txrate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
  52
  53         if (rate & MT_TXWI_RATE_SGI)
  54                 txrate->flags |= IEEE80211_TX_RC_SHORT_GI;
  55 }
  56
  57 static void
  58 mt76_mac_fill_tx_status(struct mt7601u_dev *dev, struct ieee80211_tx_info *info,
  59                         struct mt76_tx_status *st)
  60 {
  61         struct ieee80211_tx_rate *rate = info->status.rates;
  62         int cur_idx, last_rate;
  63         int i;
  64
  65         last_rate = min_t(int, st->retry, IEEE80211_TX_MAX_RATES - 1);
  66         mt76_mac_process_tx_rate(&rate[last_rate], st->rate);
  67         if (last_rate < IEEE80211_TX_MAX_RATES - 1)
  68                 rate[last_rate + 1].idx = -1;
  69
  70         cur_idx = rate[last_rate].idx + st->retry;
  71         for (i = 0; i <= last_rate; i++) {
  72                 rate[i].flags = rate[last_rate].flags;
  73                 rate[i].idx = max_t(int, 0, cur_idx - i);
  74                 rate[i].count = 1;
  75         }
  76
  77         if (last_rate > 0)
  78                 rate[last_rate - 1].count = st->retry + 1 - last_rate;
  79
  80         info->status.ampdu_len = 1;
  81         info->status.ampdu_ack_len = st->success;
  82
  83         if (st->is_probe)
  84                 info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
  85
  86         if (st->aggr)
  87                 info->flags |= IEEE80211_TX_CTL_AMPDU |
  88                                IEEE80211_TX_STAT_AMPDU;
  89
  90         if (!st->ack_req)
  91                 info->flags |= IEEE80211_TX_CTL_NO_ACK;
  92         else if (st->success)
  93                 info->flags |= IEEE80211_TX_STAT_ACK;
  94 }
  95
  96 u16 mt76_mac_tx_rate_val(struct mt7601u_dev *dev,
  97                          const struct ieee80211_tx_rate *rate, u8 *nss_val)
  98 {
  99         u16 rateval;
 100         u8 phy, rate_idx;
 101         u8 nss = 1;
 102         u8 bw = 0;
 103
 104         if (rate->flags & IEEE80211_TX_RC_MCS) {
 105                 rate_idx = rate->idx;
 106                 nss = 1 + (rate->idx >> 3);
 107                 phy = MT_PHY_TYPE_HT;
 108                 if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
 109                         phy = MT_PHY_TYPE_HT_GF;
 110                 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 111                         bw = 1;
 112         } else {
 113                 const struct ieee80211_rate *r;
 114                 int band = dev->chandef.chan->band;
 115                 u16 val;
 116
 117                 r = &dev->hw->wiphy->bands[band]->bitrates[rate->idx];
 118                 if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 119                         val = r->hw_value_short;
 120                 else
 121                         val = r->hw_value;
 122
 123                 phy = val >> 8;
 124                 rate_idx = val & 0xff;
 125                 bw = 0;
 126         }
 127
 128         rateval = FIELD_PREP(MT_RXWI_RATE_MCS, rate_idx);
 129         rateval |= FIELD_PREP(MT_RXWI_RATE_PHY, phy);
 130         rateval |= FIELD_PREP(MT_RXWI_RATE_BW, bw);
 131         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
 132                 rateval |= MT_RXWI_RATE_SGI;
 133
 134         *nss_val = nss;
 135         return rateval;
 136 }
 137
 138 void mt76_mac_wcid_set_rate(struct mt7601u_dev *dev, struct mt76_wcid *wcid,
 139                             const struct ieee80211_tx_rate *rate)
 140 {
 141         unsigned long flags;
 142
 143         spin_lock_irqsave(&dev->lock, flags);
 144         wcid->tx_rate = mt76_mac_tx_rate_val(dev, rate, &wcid->tx_rate_nss);
 145         wcid->tx_rate_set = true;
 146         spin_unlock_irqrestore(&dev->lock, flags);
 147 }
 148
 149 struct mt76_tx_status mt7601u_mac_fetch_tx_status(struct mt7601u_dev *dev)
 150 {
 151         struct mt76_tx_status stat = {};
 152         u32 val;
 153
 154         val = mt7601u_rr(dev, MT_TX_STAT_FIFO);
 155         stat.valid = !!(val & MT_TX_STAT_FIFO_VALID);
 156         stat.success = !!(val & MT_TX_STAT_FIFO_SUCCESS);
 157         stat.aggr = !!(val & MT_TX_STAT_FIFO_AGGR);
 158         stat.ack_req = !!(val & MT_TX_STAT_FIFO_ACKREQ);
 159         stat.pktid = FIELD_GET(MT_TX_STAT_FIFO_PID_TYPE, val);
 160         stat.wcid = FIELD_GET(MT_TX_STAT_FIFO_WCID, val);
 161         stat.rate = FIELD_GET(MT_TX_STAT_FIFO_RATE, val);
 162
 163         return stat;
 164 }
 165
 166 void mt76_send_tx_status(struct mt7601u_dev *dev, struct mt76_tx_status *stat)
 167 {
 168         struct ieee80211_tx_info info = {};
 169         struct ieee80211_sta *sta = NULL;
 170         struct mt76_wcid *wcid = NULL;
 171         void *msta;
 172
 173         rcu_read_lock();
 174         if (stat->wcid < ARRAY_SIZE(dev->wcid))
 175                 wcid = rcu_dereference(dev->wcid[stat->wcid]);
 176
 177         if (wcid) {
 178                 msta = container_of(wcid, struct mt76_sta, wcid);
 179                 sta = container_of(msta, struct ieee80211_sta,
 180                                    drv_priv);
 181         }
 182
 183         mt76_mac_fill_tx_status(dev, &info, stat);
 184
 185         spin_lock_bh(&dev->mac_lock);
 186         ieee80211_tx_status_noskb(dev->hw, sta, &info);
 187         spin_unlock_bh(&dev->mac_lock);
 188
 189         rcu_read_unlock();
 190 }
 191
 192 void mt7601u_mac_set_protection(struct mt7601u_dev *dev, bool legacy_prot,
 193                                 int ht_mode)
 194 {
 195         int mode = ht_mode & IEEE80211_HT_OP_MODE_PROTECTION;
 196         bool non_gf = !!(ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 197         u32 prot[6];
 198         bool ht_rts[4] = {};
 199         int i;
 200
 201         prot[0] = MT_PROT_NAV_SHORT |
 202                   MT_PROT_TXOP_ALLOW_ALL |
 203                   MT_PROT_RTS_THR_EN;
 204         prot[1] = prot[0];
 205         if (legacy_prot)
 206                 prot[1] |= MT_PROT_CTRL_CTS2SELF;
 207
 208         prot[2] = prot[4] = MT_PROT_NAV_SHORT | MT_PROT_TXOP_ALLOW_BW20;
 209         prot[3] = prot[5] = MT_PROT_NAV_SHORT | MT_PROT_TXOP_ALLOW_ALL;
 210
 211         if (legacy_prot) {
 212                 prot[2] |= MT_PROT_RATE_CCK_11;
 213                 prot[3] |= MT_PROT_RATE_CCK_11;
 214                 prot[4] |= MT_PROT_RATE_CCK_11;
 215                 prot[5] |= MT_PROT_RATE_CCK_11;
 216         } else {
 217                 prot[2] |= MT_PROT_RATE_OFDM_24;
 218                 prot[3] |= MT_PROT_RATE_DUP_OFDM_24;
 219                 prot[4] |= MT_PROT_RATE_OFDM_24;
 220                 prot[5] |= MT_PROT_RATE_DUP_OFDM_24;
 221         }
 222
 223         switch (mode) {
 224         case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
 225                 break;
 226
 227         case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
 228                 ht_rts[0] = ht_rts[1] = ht_rts[2] = ht_rts[3] = true;
 229                 break;
 230
 231         case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
 232                 ht_rts[1] = ht_rts[3] = true;
 233                 break;
 234
 235         case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
 236                 ht_rts[0] = ht_rts[1] = ht_rts[2] = ht_rts[3] = true;
 237                 break;
 238         }
 239
 240         if (non_gf)
 241                 ht_rts[2] = ht_rts[3] = true;
 242
 243         for (i = 0; i < 4; i++)
 244                 if (ht_rts[i])
 245                         prot[i + 2] |= MT_PROT_CTRL_RTS_CTS;
 246
 247         for (i = 0; i < 6; i++)
 248                 mt7601u_wr(dev, MT_CCK_PROT_CFG + i * 4, prot[i]);
 249 }
 250
 251 void mt7601u_mac_set_short_preamble(struct mt7601u_dev *dev, bool short_preamb)
 252 {
 253         if (short_preamb)
 254                 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT);
 255         else
 256                 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT);
 257 }
 258
 259 void mt7601u_mac_config_tsf(struct mt7601u_dev *dev, bool enable, int interval)
 260 {
 261         u32 val = mt7601u_rr(dev, MT_BEACON_TIME_CFG);
 262
 263         val &= ~(MT_BEACON_TIME_CFG_TIMER_EN |
 264                  MT_BEACON_TIME_CFG_SYNC_MODE |
 265                  MT_BEACON_TIME_CFG_TBTT_EN);
 266
 267         if (!enable) {
 268                 mt7601u_wr(dev, MT_BEACON_TIME_CFG, val);
 269                 return;
 270         }
 271
 272         val &= ~MT_BEACON_TIME_CFG_INTVAL;
 273         val |= FIELD_PREP(MT_BEACON_TIME_CFG_INTVAL, interval << 4) |
 274                 MT_BEACON_TIME_CFG_TIMER_EN |
 275                 MT_BEACON_TIME_CFG_SYNC_MODE |
 276                 MT_BEACON_TIME_CFG_TBTT_EN;
 277 }
 278
 279 static void mt7601u_check_mac_err(struct mt7601u_dev *dev)
 280 {
 281         u32 val = mt7601u_rr(dev, 0x10f4);
 282
 283         if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5))))
 284                 return;
 285
 286         dev_err(dev->dev, "Error: MAC specific condition occurred\n");
 287
 288         mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
 289         udelay(10);
 290         mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
 291 }
 292
 293 void mt7601u_mac_work(struct work_struct *work)
 294 {
 295         struct mt7601u_dev *dev = container_of(work, struct mt7601u_dev,
 296                                                mac_work.work);
 297         struct {
 298                 u32 addr_base;
 299                 u32 span;
 300                 u64 *stat_base;
 301         } spans[] = {
 302                 { MT_RX_STA_CNT0,       3,      dev->stats.rx_stat },
 303                 { MT_TX_STA_CNT0,       3,      dev->stats.tx_stat },
 304                 { MT_TX_AGG_STAT,       1,      dev->stats.aggr_stat },
 305                 { MT_MPDU_DENSITY_CNT,  1,      dev->stats.zero_len_del },
 306                 { MT_TX_AGG_CNT_BASE0,  8,      &dev->stats.aggr_n[0] },
 307                 { MT_TX_AGG_CNT_BASE1,  8,      &dev->stats.aggr_n[16] },
 308         };
 309         u32 sum, n;
 310         int i, j, k;
 311
 312         /* Note: using MCU_RANDOM_READ is actually slower then reading all the
 313          *       registers by hand.  MCU takes ca. 20ms to complete read of 24
 314          *       registers while reading them one by one will takes roughly
 315          *       24*200us =~ 5ms.
 316          */
 317
 318         k = 0;
 319         n = 0;
 320         sum = 0;
 321         for (i = 0; i < ARRAY_SIZE(spans); i++)
 322                 for (j = 0; j < spans[i].span; j++) {
 323                         u32 val = mt7601u_rr(dev, spans[i].addr_base + j * 4);
 324
 325                         spans[i].stat_base[j * 2] += val & 0xffff;
 326                         spans[i].stat_base[j * 2 + 1] += val >> 16;
 327
 328                         /* Calculate average AMPDU length */
 329                         if (spans[i].addr_base != MT_TX_AGG_CNT_BASE0 &&
 330                             spans[i].addr_base != MT_TX_AGG_CNT_BASE1)
 331                                 continue;
 332
 333                         n += (val >> 16) + (val & 0xffff);
 334                         sum += (val & 0xffff) * (1 + k * 2) +
 335                                 (val >> 16) * (2 + k * 2);
 336                         k++;
 337                 }
 338
 339         atomic_set(&dev->avg_ampdu_len, n ? DIV_ROUND_CLOSEST(sum, n) : 1);
 340
 341         mt7601u_check_mac_err(dev);
 342
 343         ieee80211_queue_delayed_work(dev->hw, &dev->mac_work, 10 * HZ);
 344 }
 345
 346 void
 347 mt7601u_mac_wcid_setup(struct mt7601u_dev *dev, u8 idx, u8 vif_idx, u8 *mac)
 348 {
 349         u8 zmac[ETH_ALEN] = {};
 350         u32 attr;
 351
 352         attr = FIELD_PREP(MT_WCID_ATTR_BSS_IDX, vif_idx & 7) |
 353                FIELD_PREP(MT_WCID_ATTR_BSS_IDX_EXT, !!(vif_idx & 8));
 354
 355         mt76_wr(dev, MT_WCID_ATTR(idx), attr);
 356
 357         if (mac)
 358                 memcpy(zmac, mac, sizeof(zmac));
 359
 360         mt7601u_addr_wr(dev, MT_WCID_ADDR(idx), zmac);
 361 }
 362
 363 void mt7601u_mac_set_ampdu_factor(struct mt7601u_dev *dev)
 364 {
 365         struct ieee80211_sta *sta;
 366         struct mt76_wcid *wcid;
 367         void *msta;
 368         u8 min_factor = 3;
 369         int i;
 370
 371         rcu_read_lock();
 372         for (i = 0; i < ARRAY_SIZE(dev->wcid); i++) {
 373                 wcid = rcu_dereference(dev->wcid[i]);
 374                 if (!wcid)
 375                         continue;
 376
 377                 msta = container_of(wcid, struct mt76_sta, wcid);
 378                 sta = container_of(msta, struct ieee80211_sta, drv_priv);
 379
 380                 min_factor = min(min_factor, sta->ht_cap.ampdu_factor);
 381         }
 382         rcu_read_unlock();
 383
 384         mt7601u_wr(dev, MT_MAX_LEN_CFG, 0xa0fff |
 385                    FIELD_PREP(MT_MAX_LEN_CFG_AMPDU, min_factor));
 386 }
 387
 388 static void
 389 mt76_mac_process_rate(struct ieee80211_rx_status *status, u16 rate)
 390 {
 391         u8 idx = FIELD_GET(MT_RXWI_RATE_MCS, rate);
 392
 393         switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) {
 394         case MT_PHY_TYPE_OFDM:
 395                 if (WARN_ON(idx >= 8))
 396                         idx = 0;
 397                 idx += 4;
 398
 399                 status->rate_idx = idx;
 400                 return;
 401         case MT_PHY_TYPE_CCK:
 402                 if (idx >= 8) {
 403                         idx -= 8;
 404                         status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
 405                 }
 406
 407                 if (WARN_ON(idx >= 4))
 408                         idx = 0;
 409
 410                 status->rate_idx = idx;
 411                 return;
 412         case MT_PHY_TYPE_HT_GF:
 413                 status->enc_flags |= RX_ENC_FLAG_HT_GF;
 414                 /* fall through */
 415         case MT_PHY_TYPE_HT:
 416                 status->encoding = RX_ENC_HT;
 417                 status->rate_idx = idx;
 418                 break;
 419         default:
 420                 WARN_ON(1);
 421                 return;
 422         }
 423
 424         if (rate & MT_RXWI_RATE_SGI)
 425                 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
 426
 427         if (rate & MT_RXWI_RATE_STBC)
 428                 status->enc_flags |= 1 << RX_ENC_FLAG_STBC_SHIFT;
 429
 430         if (rate & MT_RXWI_RATE_BW)
 431                 status->bw = RATE_INFO_BW_40;
 432 }
 433
 434 static void
 435 mt7601u_rx_monitor_beacon(struct mt7601u_dev *dev, struct mt7601u_rxwi *rxwi,
 436                           u16 rate, int rssi)
 437 {
 438         dev->bcn_freq_off = rxwi->freq_off;
 439         dev->bcn_phy_mode = FIELD_GET(MT_RXWI_RATE_PHY, rate);
 440         dev->avg_rssi = (dev->avg_rssi * 15) / 16 + (rssi << 8);
 441 }
 442
 443 static int
 444 mt7601u_rx_is_our_beacon(struct mt7601u_dev *dev, u8 *data)
 445 {
 446         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)data;
 447
 448         return ieee80211_is_beacon(hdr->frame_control) &&
 449                 ether_addr_equal(hdr->addr2, dev->ap_bssid);
 450 }
 451
 452 u32 mt76_mac_process_rx(struct mt7601u_dev *dev, struct sk_buff *skb,
 453                         u8 *data, void *rxi)
 454 {
 455         struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
 456         struct mt7601u_rxwi *rxwi = rxi;
 457         u32 len, ctl = le32_to_cpu(rxwi->ctl);
 458         u16 rate = le16_to_cpu(rxwi->rate);
 459         int rssi;
 460
 461         len = FIELD_GET(MT_RXWI_CTL_MPDU_LEN, ctl);
 462         if (len < 10)
 463                 return 0;
 464
 465         if (rxwi->rxinfo & cpu_to_le32(MT_RXINFO_DECRYPT)) {
 466                 status->flag |= RX_FLAG_DECRYPTED;
 467                 status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED;
 468         }
 469
 470         status->chains = BIT(0);
 471         rssi = mt7601u_phy_get_rssi(dev, rxwi, rate);
 472         status->chain_signal[0] = status->signal = rssi;
 473         status->freq = dev->chandef.chan->center_freq;
 474         status->band = dev->chandef.chan->band;
 475
 476         mt76_mac_process_rate(status, rate);
 477
 478         spin_lock_bh(&dev->con_mon_lock);
 479         if (mt7601u_rx_is_our_beacon(dev, data))
 480                 mt7601u_rx_monitor_beacon(dev, rxwi, rate, rssi);
 481         else if (rxwi->rxinfo & cpu_to_le32(MT_RXINFO_U2M))
 482                 dev->avg_rssi = (dev->avg_rssi * 15) / 16 + (rssi << 8);
 483         spin_unlock_bh(&dev->con_mon_lock);
 484
 485         return len;
 486 }
 487
 488 static enum mt76_cipher_type
 489 mt76_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data)
 490 {
 491         memset(key_data, 0, 32);
 492         if (!key)
 493                 return MT_CIPHER_NONE;
 494
 495         if (key->keylen > 32)
 496                 return MT_CIPHER_NONE;
 497
 498         memcpy(key_data, key->key, key->keylen);
 499
 500         switch (key->cipher) {
 501         case WLAN_CIPHER_SUITE_WEP40:
 502                 return MT_CIPHER_WEP40;
 503         case WLAN_CIPHER_SUITE_WEP104:
 504                 return MT_CIPHER_WEP104;
 505         case WLAN_CIPHER_SUITE_TKIP:
 506                 return MT_CIPHER_TKIP;
 507         case WLAN_CIPHER_SUITE_CCMP:
 508                 return MT_CIPHER_AES_CCMP;
 509         default:
 510                 return MT_CIPHER_NONE;
 511         }
 512 }
 513
 514 int mt76_mac_wcid_set_key(struct mt7601u_dev *dev, u8 idx,
 515                           struct ieee80211_key_conf *key)
 516 {
 517         enum mt76_cipher_type cipher;
 518         u8 key_data[32];
 519         u8 iv_data[8];
 520         u32 val;
 521
 522         cipher = mt76_mac_get_key_info(key, key_data);
 523         if (cipher == MT_CIPHER_NONE && key)
 524                 return -EINVAL;
 525
 526         trace_set_key(dev, idx);
 527
 528         mt7601u_wr_copy(dev, MT_WCID_KEY(idx), key_data, sizeof(key_data));
 529
 530         memset(iv_data, 0, sizeof(iv_data));
 531         if (key) {
 532                 iv_data[3] = key->keyidx << 6;
 533                 if (cipher >= MT_CIPHER_TKIP) {
 534                         /* Note: start with 1 to comply with spec,
 535                          *       (see comment on common/cmm_wpa.c:4291).
 536                          */
 537                         iv_data[0] |= 1;
 538                         iv_data[3] |= 0x20;
 539                 }
 540         }
 541         mt7601u_wr_copy(dev, MT_WCID_IV(idx), iv_data, sizeof(iv_data));
 542
 543         val = mt7601u_rr(dev, MT_WCID_ATTR(idx));
 544         val &= ~MT_WCID_ATTR_PKEY_MODE & ~MT_WCID_ATTR_PKEY_MODE_EXT;
 545         val |= FIELD_PREP(MT_WCID_ATTR_PKEY_MODE, cipher & 7) |
 546                FIELD_PREP(MT_WCID_ATTR_PKEY_MODE_EXT, cipher >> 3);
 547         val &= ~MT_WCID_ATTR_PAIRWISE;
 548         val |= MT_WCID_ATTR_PAIRWISE *
 549                 !!(key && key->flags & IEEE80211_KEY_FLAG_PAIRWISE);
 550         mt7601u_wr(dev, MT_WCID_ATTR(idx), val);
 551
 552         return 0;
 553 }
 554
 555 int mt76_mac_shared_key_setup(struct mt7601u_dev *dev, u8 vif_idx, u8 key_idx,
 556                               struct ieee80211_key_conf *key)
 557 {
 558         enum mt76_cipher_type cipher;
 559         u8 key_data[32];
 560         u32 val;
 561
 562         cipher = mt76_mac_get_key_info(key, key_data);
 563         if (cipher == MT_CIPHER_NONE && key)
 564                 return -EINVAL;
 565
 566         trace_set_shared_key(dev, vif_idx, key_idx);
 567
 568         mt7601u_wr_copy(dev, MT_SKEY(vif_idx, key_idx),
 569                         key_data, sizeof(key_data));
 570
 571         val = mt76_rr(dev, MT_SKEY_MODE(vif_idx));
 572         val &= ~(MT_SKEY_MODE_MASK << MT_SKEY_MODE_SHIFT(vif_idx, key_idx));
 573         val |= cipher << MT_SKEY_MODE_SHIFT(vif_idx, key_idx);
 574         mt76_wr(dev, MT_SKEY_MODE(vif_idx), val);
 575
 576         return 0;
 577 }