1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> 4 * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl> 5 */ 6 7 #include "mt76x02.h" 8 #include "mt76x02_trace.h" 9 #include "trace.h" 10 11 void mt76x02_mac_reset_counters(struct mt76x02_dev *dev) 12 { 13 int i; 14 15 mt76_rr(dev, MT_RX_STAT_0); 16 mt76_rr(dev, MT_RX_STAT_1); 17 mt76_rr(dev, MT_RX_STAT_2); 18 mt76_rr(dev, MT_TX_STA_0); 19 mt76_rr(dev, MT_TX_STA_1); 20 mt76_rr(dev, MT_TX_STA_2); 21 22 for (i = 0; i < 16; i++) 23 mt76_rr(dev, MT_TX_AGG_CNT(i)); 24 25 for (i = 0; i < 16; i++) 26 mt76_rr(dev, MT_TX_STAT_FIFO); 27 28 memset(dev->mphy.aggr_stats, 0, sizeof(dev->mphy.aggr_stats)); 29 } 30 EXPORT_SYMBOL_GPL(mt76x02_mac_reset_counters); 31 32 static enum mt76x02_cipher_type 33 mt76x02_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data) 34 { 35 memset(key_data, 0, 32); 36 if (!key) 37 return MT76X02_CIPHER_NONE; 38 39 if (key->keylen > 32) 40 return MT76X02_CIPHER_NONE; 41 42 memcpy(key_data, key->key, key->keylen); 43 44 switch (key->cipher) { 45 case WLAN_CIPHER_SUITE_WEP40: 46 return MT76X02_CIPHER_WEP40; 47 case WLAN_CIPHER_SUITE_WEP104: 48 return MT76X02_CIPHER_WEP104; 49 case WLAN_CIPHER_SUITE_TKIP: 50 return MT76X02_CIPHER_TKIP; 51 case WLAN_CIPHER_SUITE_CCMP: 52 return MT76X02_CIPHER_AES_CCMP; 53 default: 54 return MT76X02_CIPHER_NONE; 55 } 56 } 57 58 int mt76x02_mac_shared_key_setup(struct mt76x02_dev *dev, u8 vif_idx, 59 u8 key_idx, struct ieee80211_key_conf *key) 60 { 61 enum mt76x02_cipher_type cipher; 62 u8 key_data[32]; 63 u32 val; 64 65 cipher = mt76x02_mac_get_key_info(key, key_data); 66 if (cipher == MT76X02_CIPHER_NONE && key) 67 return -EOPNOTSUPP; 68 69 val = mt76_rr(dev, MT_SKEY_MODE(vif_idx)); 70 val &= ~(MT_SKEY_MODE_MASK << MT_SKEY_MODE_SHIFT(vif_idx, key_idx)); 71 val |= cipher << MT_SKEY_MODE_SHIFT(vif_idx, key_idx); 72 mt76_wr(dev, MT_SKEY_MODE(vif_idx), val); 73 74 mt76_wr_copy(dev, MT_SKEY(vif_idx, key_idx), key_data, 75 sizeof(key_data)); 76 77 return 0; 78 } 79 EXPORT_SYMBOL_GPL(mt76x02_mac_shared_key_setup); 80 81 void mt76x02_mac_wcid_sync_pn(struct mt76x02_dev *dev, u8 idx, 82 struct ieee80211_key_conf *key) 83 { 84 enum mt76x02_cipher_type cipher; 85 u8 key_data[32]; 86 u32 iv, eiv; 87 u64 pn; 88 89 cipher = mt76x02_mac_get_key_info(key, key_data); 90 iv = mt76_rr(dev, MT_WCID_IV(idx)); 91 eiv = mt76_rr(dev, MT_WCID_IV(idx) + 4); 92 93 pn = (u64)eiv << 16; 94 if (cipher == MT76X02_CIPHER_TKIP) { 95 pn |= (iv >> 16) & 0xff; 96 pn |= (iv & 0xff) << 8; 97 } else if (cipher >= MT76X02_CIPHER_AES_CCMP) { 98 pn |= iv & 0xffff; 99 } else { 100 return; 101 } 102 103 atomic64_set(&key->tx_pn, pn); 104 } 105 106 int mt76x02_mac_wcid_set_key(struct mt76x02_dev *dev, u8 idx, 107 struct ieee80211_key_conf *key) 108 { 109 enum mt76x02_cipher_type cipher; 110 u8 key_data[32]; 111 u8 iv_data[8]; 112 u64 pn; 113 114 cipher = mt76x02_mac_get_key_info(key, key_data); 115 if (cipher == MT76X02_CIPHER_NONE && key) 116 return -EOPNOTSUPP; 117 118 mt76_wr_copy(dev, MT_WCID_KEY(idx), key_data, sizeof(key_data)); 119 mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PKEY_MODE, cipher); 120 121 memset(iv_data, 0, sizeof(iv_data)); 122 if (key) { 123 mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PAIRWISE, 124 !!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)); 125 126 pn = atomic64_read(&key->tx_pn); 127 128 iv_data[3] = key->keyidx << 6; 129 if (cipher >= MT76X02_CIPHER_TKIP) { 130 iv_data[3] |= 0x20; 131 put_unaligned_le32(pn >> 16, &iv_data[4]); 132 } 133 134 if (cipher == MT76X02_CIPHER_TKIP) { 135 iv_data[0] = (pn >> 8) & 0xff; 136 iv_data[1] = (iv_data[0] | 0x20) & 0x7f; 137 iv_data[2] = pn & 0xff; 138 } else if (cipher >= MT76X02_CIPHER_AES_CCMP) { 139 put_unaligned_le16((pn & 0xffff), &iv_data[0]); 140 } 141 } 142 143 mt76_wr_copy(dev, MT_WCID_IV(idx), iv_data, sizeof(iv_data)); 144 145 return 0; 146 } 147 148 void mt76x02_mac_wcid_setup(struct mt76x02_dev *dev, u8 idx, 149 u8 vif_idx, u8 *mac) 150 { 151 struct mt76_wcid_addr addr = {}; 152 u32 attr; 153 154 attr = FIELD_PREP(MT_WCID_ATTR_BSS_IDX, vif_idx & 7) | 155 FIELD_PREP(MT_WCID_ATTR_BSS_IDX_EXT, !!(vif_idx & 8)); 156 157 mt76_wr(dev, MT_WCID_ATTR(idx), attr); 158 159 if (idx >= 128) 160 return; 161 162 if (mac) 163 memcpy(addr.macaddr, mac, ETH_ALEN); 164 165 mt76_wr_copy(dev, MT_WCID_ADDR(idx), &addr, sizeof(addr)); 166 } 167 EXPORT_SYMBOL_GPL(mt76x02_mac_wcid_setup); 168 169 void mt76x02_mac_wcid_set_drop(struct mt76x02_dev *dev, u8 idx, bool drop) 170 { 171 u32 val = mt76_rr(dev, MT_WCID_DROP(idx)); 172 u32 bit = MT_WCID_DROP_MASK(idx); 173 174 /* prevent unnecessary writes */ 175 if ((val & bit) != (bit * drop)) 176 mt76_wr(dev, MT_WCID_DROP(idx), (val & ~bit) | (bit * drop)); 177 } 178 179 static u16 180 mt76x02_mac_tx_rate_val(struct mt76x02_dev *dev, 181 const struct ieee80211_tx_rate *rate, u8 *nss_val) 182 { 183 u8 phy, rate_idx, nss, bw = 0; 184 u16 rateval; 185 186 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 187 rate_idx = rate->idx; 188 nss = 1 + (rate->idx >> 4); 189 phy = MT_PHY_TYPE_VHT; 190 if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) 191 bw = 2; 192 else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 193 bw = 1; 194 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 195 rate_idx = rate->idx; 196 nss = 1 + (rate->idx >> 3); 197 phy = MT_PHY_TYPE_HT; 198 if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD) 199 phy = MT_PHY_TYPE_HT_GF; 200 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) 201 bw = 1; 202 } else { 203 const struct ieee80211_rate *r; 204 int band = dev->mphy.chandef.chan->band; 205 u16 val; 206 207 r = &dev->mt76.hw->wiphy->bands[band]->bitrates[rate->idx]; 208 if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) 209 val = r->hw_value_short; 210 else 211 val = r->hw_value; 212 213 phy = val >> 8; 214 rate_idx = val & 0xff; 215 nss = 1; 216 } 217 218 rateval = FIELD_PREP(MT_RXWI_RATE_INDEX, rate_idx); 219 rateval |= FIELD_PREP(MT_RXWI_RATE_PHY, phy); 220 rateval |= FIELD_PREP(MT_RXWI_RATE_BW, bw); 221 if (rate->flags & IEEE80211_TX_RC_SHORT_GI) 222 rateval |= MT_RXWI_RATE_SGI; 223 224 *nss_val = nss; 225 return rateval; 226 } 227 228 void mt76x02_mac_wcid_set_rate(struct mt76x02_dev *dev, struct mt76_wcid *wcid, 229 const struct ieee80211_tx_rate *rate) 230 { 231 s8 max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate); 232 u16 rateval; 233 u32 tx_info; 234 s8 nss; 235 236 rateval = mt76x02_mac_tx_rate_val(dev, rate, &nss); 237 tx_info = FIELD_PREP(MT_WCID_TX_INFO_RATE, rateval) | 238 FIELD_PREP(MT_WCID_TX_INFO_NSS, nss) | 239 FIELD_PREP(MT_WCID_TX_INFO_TXPWR_ADJ, max_txpwr_adj) | 240 MT_WCID_TX_INFO_SET; 241 wcid->tx_info = tx_info; 242 } 243 244 void mt76x02_mac_set_short_preamble(struct mt76x02_dev *dev, bool enable) 245 { 246 if (enable) 247 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT); 248 else 249 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT); 250 } 251 252 bool mt76x02_mac_load_tx_status(struct mt76x02_dev *dev, 253 struct mt76x02_tx_status *stat) 254 { 255 u32 stat1, stat2; 256 257 stat2 = mt76_rr(dev, MT_TX_STAT_FIFO_EXT); 258 stat1 = mt76_rr(dev, MT_TX_STAT_FIFO); 259 260 stat->valid = !!(stat1 & MT_TX_STAT_FIFO_VALID); 261 if (!stat->valid) 262 return false; 263 264 stat->success = !!(stat1 & MT_TX_STAT_FIFO_SUCCESS); 265 stat->aggr = !!(stat1 & MT_TX_STAT_FIFO_AGGR); 266 stat->ack_req = !!(stat1 & MT_TX_STAT_FIFO_ACKREQ); 267 stat->wcid = FIELD_GET(MT_TX_STAT_FIFO_WCID, stat1); 268 stat->rate = FIELD_GET(MT_TX_STAT_FIFO_RATE, stat1); 269 270 stat->retry = FIELD_GET(MT_TX_STAT_FIFO_EXT_RETRY, stat2); 271 stat->pktid = FIELD_GET(MT_TX_STAT_FIFO_EXT_PKTID, stat2); 272 273 trace_mac_txstat_fetch(dev, stat); 274 275 return true; 276 } 277 278 static int 279 mt76x02_mac_process_tx_rate(struct ieee80211_tx_rate *txrate, u16 rate, 280 enum nl80211_band band) 281 { 282 u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate); 283 284 txrate->idx = 0; 285 txrate->flags = 0; 286 txrate->count = 1; 287 288 switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) { 289 case MT_PHY_TYPE_OFDM: 290 if (band == NL80211_BAND_2GHZ) 291 idx += 4; 292 293 txrate->idx = idx; 294 return 0; 295 case MT_PHY_TYPE_CCK: 296 if (idx >= 8) 297 idx -= 8; 298 299 txrate->idx = idx; 300 return 0; 301 case MT_PHY_TYPE_HT_GF: 302 txrate->flags |= IEEE80211_TX_RC_GREEN_FIELD; 303 fallthrough; 304 case MT_PHY_TYPE_HT: 305 txrate->flags |= IEEE80211_TX_RC_MCS; 306 txrate->idx = idx; 307 break; 308 case MT_PHY_TYPE_VHT: 309 txrate->flags |= IEEE80211_TX_RC_VHT_MCS; 310 txrate->idx = idx; 311 break; 312 default: 313 return -EINVAL; 314 } 315 316 switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) { 317 case MT_PHY_BW_20: 318 break; 319 case MT_PHY_BW_40: 320 txrate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; 321 break; 322 case MT_PHY_BW_80: 323 txrate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; 324 break; 325 default: 326 return -EINVAL; 327 } 328 329 if (rate & MT_RXWI_RATE_SGI) 330 txrate->flags |= IEEE80211_TX_RC_SHORT_GI; 331 332 return 0; 333 } 334 335 void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi, 336 struct sk_buff *skb, struct mt76_wcid *wcid, 337 struct ieee80211_sta *sta, int len) 338 { 339 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 340 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 341 struct ieee80211_tx_rate *rate = &info->control.rates[0]; 342 struct ieee80211_key_conf *key = info->control.hw_key; 343 u32 wcid_tx_info; 344 u16 rate_ht_mask = FIELD_PREP(MT_RXWI_RATE_PHY, BIT(1) | BIT(2)); 345 u16 txwi_flags = 0, rateval; 346 u8 nss; 347 s8 txpwr_adj, max_txpwr_adj; 348 u8 ccmp_pn[8], nstreams = dev->mphy.chainmask & 0xf; 349 350 memset(txwi, 0, sizeof(*txwi)); 351 352 mt76_tx_check_agg_ssn(sta, skb); 353 354 if (!info->control.hw_key && wcid && wcid->hw_key_idx != 0xff && 355 ieee80211_has_protected(hdr->frame_control)) { 356 wcid = NULL; 357 ieee80211_get_tx_rates(info->control.vif, sta, skb, 358 info->control.rates, 1); 359 } 360 361 if (wcid) 362 txwi->wcid = wcid->idx; 363 else 364 txwi->wcid = 0xff; 365 366 if (wcid && wcid->sw_iv && key) { 367 u64 pn = atomic64_inc_return(&key->tx_pn); 368 369 ccmp_pn[0] = pn; 370 ccmp_pn[1] = pn >> 8; 371 ccmp_pn[2] = 0; 372 ccmp_pn[3] = 0x20 | (key->keyidx << 6); 373 ccmp_pn[4] = pn >> 16; 374 ccmp_pn[5] = pn >> 24; 375 ccmp_pn[6] = pn >> 32; 376 ccmp_pn[7] = pn >> 40; 377 txwi->iv = *((__le32 *)&ccmp_pn[0]); 378 txwi->eiv = *((__le32 *)&ccmp_pn[4]); 379 } 380 381 if (wcid && (rate->idx < 0 || !rate->count)) { 382 wcid_tx_info = wcid->tx_info; 383 rateval = FIELD_GET(MT_WCID_TX_INFO_RATE, wcid_tx_info); 384 max_txpwr_adj = FIELD_GET(MT_WCID_TX_INFO_TXPWR_ADJ, 385 wcid_tx_info); 386 nss = FIELD_GET(MT_WCID_TX_INFO_NSS, wcid_tx_info); 387 } else { 388 rateval = mt76x02_mac_tx_rate_val(dev, rate, &nss); 389 max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate); 390 } 391 txwi->rate = cpu_to_le16(rateval); 392 393 txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, dev->txpower_conf, 394 max_txpwr_adj); 395 txwi->ctl2 = FIELD_PREP(MT_TX_PWR_ADJ, txpwr_adj); 396 397 if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E4) 398 txwi->txstream = 0x13; 399 else if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E3 && 400 !(txwi->rate & cpu_to_le16(rate_ht_mask))) 401 txwi->txstream = 0x93; 402 403 if (is_mt76x2(dev) && (info->flags & IEEE80211_TX_CTL_LDPC)) 404 txwi->rate |= cpu_to_le16(MT_RXWI_RATE_LDPC); 405 if ((info->flags & IEEE80211_TX_CTL_STBC) && nss == 1) 406 txwi->rate |= cpu_to_le16(MT_RXWI_RATE_STBC); 407 if (nss > 1 && sta && sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC) 408 txwi_flags |= MT_TXWI_FLAGS_MMPS; 409 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) 410 txwi->ack_ctl |= MT_TXWI_ACK_CTL_REQ; 411 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) 412 txwi->ack_ctl |= MT_TXWI_ACK_CTL_NSEQ; 413 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) { 414 u8 ba_size = IEEE80211_MIN_AMPDU_BUF; 415 u8 ampdu_density = sta->deflink.ht_cap.ampdu_density; 416 417 ba_size <<= sta->deflink.ht_cap.ampdu_factor; 418 ba_size = min_t(int, 63, ba_size - 1); 419 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) 420 ba_size = 0; 421 txwi->ack_ctl |= FIELD_PREP(MT_TXWI_ACK_CTL_BA_WINDOW, ba_size); 422 423 if (ampdu_density < IEEE80211_HT_MPDU_DENSITY_4) 424 ampdu_density = IEEE80211_HT_MPDU_DENSITY_4; 425 426 txwi_flags |= MT_TXWI_FLAGS_AMPDU | 427 FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY, ampdu_density); 428 } 429 430 if (ieee80211_is_probe_resp(hdr->frame_control) || 431 ieee80211_is_beacon(hdr->frame_control)) 432 txwi_flags |= MT_TXWI_FLAGS_TS; 433 434 txwi->flags |= cpu_to_le16(txwi_flags); 435 txwi->len_ctl = cpu_to_le16(len); 436 } 437 EXPORT_SYMBOL_GPL(mt76x02_mac_write_txwi); 438 439 static void 440 mt76x02_tx_rate_fallback(struct ieee80211_tx_rate *rates, int idx, int phy) 441 { 442 u8 mcs, nss; 443 444 if (!idx) 445 return; 446 447 rates += idx - 1; 448 rates[1] = rates[0]; 449 switch (phy) { 450 case MT_PHY_TYPE_VHT: 451 mcs = ieee80211_rate_get_vht_mcs(rates); 452 nss = ieee80211_rate_get_vht_nss(rates); 453 454 if (mcs == 0) 455 nss = max_t(int, nss - 1, 1); 456 else 457 mcs--; 458 459 ieee80211_rate_set_vht(rates + 1, mcs, nss); 460 break; 461 case MT_PHY_TYPE_HT_GF: 462 case MT_PHY_TYPE_HT: 463 /* MCS 8 falls back to MCS 0 */ 464 if (rates[0].idx == 8) { 465 rates[1].idx = 0; 466 break; 467 } 468 fallthrough; 469 default: 470 rates[1].idx = max_t(int, rates[0].idx - 1, 0); 471 break; 472 } 473 } 474 475 static void 476 mt76x02_mac_fill_tx_status(struct mt76x02_dev *dev, struct mt76x02_sta *msta, 477 struct ieee80211_tx_info *info, 478 struct mt76x02_tx_status *st, int n_frames) 479 { 480 struct ieee80211_tx_rate *rate = info->status.rates; 481 struct ieee80211_tx_rate last_rate; 482 u16 first_rate; 483 int retry = st->retry; 484 int phy; 485 int i; 486 487 if (!n_frames) 488 return; 489 490 phy = FIELD_GET(MT_RXWI_RATE_PHY, st->rate); 491 492 if (st->pktid & MT_PACKET_ID_HAS_RATE) { 493 first_rate = st->rate & ~MT_PKTID_RATE; 494 first_rate |= st->pktid & MT_PKTID_RATE; 495 496 mt76x02_mac_process_tx_rate(&rate[0], first_rate, 497 dev->mphy.chandef.chan->band); 498 } else if (rate[0].idx < 0) { 499 if (!msta) 500 return; 501 502 mt76x02_mac_process_tx_rate(&rate[0], msta->wcid.tx_info, 503 dev->mphy.chandef.chan->band); 504 } 505 506 mt76x02_mac_process_tx_rate(&last_rate, st->rate, 507 dev->mphy.chandef.chan->band); 508 509 for (i = 0; i < ARRAY_SIZE(info->status.rates); i++) { 510 retry--; 511 if (i + 1 == ARRAY_SIZE(info->status.rates)) { 512 info->status.rates[i] = last_rate; 513 info->status.rates[i].count = max_t(int, retry, 1); 514 break; 515 } 516 517 mt76x02_tx_rate_fallback(info->status.rates, i, phy); 518 if (info->status.rates[i].idx == last_rate.idx) 519 break; 520 } 521 522 if (i + 1 < ARRAY_SIZE(info->status.rates)) { 523 info->status.rates[i + 1].idx = -1; 524 info->status.rates[i + 1].count = 0; 525 } 526 527 info->status.ampdu_len = n_frames; 528 info->status.ampdu_ack_len = st->success ? n_frames : 0; 529 530 if (st->aggr) 531 info->flags |= IEEE80211_TX_CTL_AMPDU | 532 IEEE80211_TX_STAT_AMPDU; 533 534 if (!st->ack_req) 535 info->flags |= IEEE80211_TX_CTL_NO_ACK; 536 else if (st->success) 537 info->flags |= IEEE80211_TX_STAT_ACK; 538 } 539 540 void mt76x02_send_tx_status(struct mt76x02_dev *dev, 541 struct mt76x02_tx_status *stat, u8 *update) 542 { 543 struct ieee80211_tx_info info = {}; 544 struct ieee80211_tx_status status = { 545 .info = &info 546 }; 547 static const u8 ac_to_tid[4] = { 548 [IEEE80211_AC_BE] = 0, 549 [IEEE80211_AC_BK] = 1, 550 [IEEE80211_AC_VI] = 4, 551 [IEEE80211_AC_VO] = 6 552 }; 553 struct mt76_wcid *wcid = NULL; 554 struct mt76x02_sta *msta = NULL; 555 struct mt76_dev *mdev = &dev->mt76; 556 struct sk_buff_head list; 557 u32 duration = 0; 558 u8 cur_pktid; 559 u32 ac = 0; 560 int len = 0; 561 562 if (stat->pktid == MT_PACKET_ID_NO_ACK) 563 return; 564 565 rcu_read_lock(); 566 567 if (stat->wcid < MT76x02_N_WCIDS) 568 wcid = rcu_dereference(dev->mt76.wcid[stat->wcid]); 569 570 if (wcid && wcid->sta) { 571 void *priv; 572 573 priv = msta = container_of(wcid, struct mt76x02_sta, wcid); 574 status.sta = container_of(priv, struct ieee80211_sta, 575 drv_priv); 576 } 577 578 mt76_tx_status_lock(mdev, &list); 579 580 if (wcid) { 581 if (mt76_is_skb_pktid(stat->pktid)) 582 status.skb = mt76_tx_status_skb_get(mdev, wcid, 583 stat->pktid, &list); 584 if (status.skb) 585 status.info = IEEE80211_SKB_CB(status.skb); 586 } 587 588 if (!status.skb && !(stat->pktid & MT_PACKET_ID_HAS_RATE)) { 589 mt76_tx_status_unlock(mdev, &list); 590 goto out; 591 } 592 593 594 if (msta && stat->aggr && !status.skb) { 595 u32 stat_val, stat_cache; 596 597 stat_val = stat->rate; 598 stat_val |= ((u32)stat->retry) << 16; 599 stat_cache = msta->status.rate; 600 stat_cache |= ((u32)msta->status.retry) << 16; 601 602 if (*update == 0 && stat_val == stat_cache && 603 stat->wcid == msta->status.wcid && msta->n_frames < 32) { 604 msta->n_frames++; 605 mt76_tx_status_unlock(mdev, &list); 606 goto out; 607 } 608 609 cur_pktid = msta->status.pktid; 610 mt76x02_mac_fill_tx_status(dev, msta, status.info, 611 &msta->status, msta->n_frames); 612 613 msta->status = *stat; 614 msta->n_frames = 1; 615 *update = 0; 616 } else { 617 cur_pktid = stat->pktid; 618 mt76x02_mac_fill_tx_status(dev, msta, status.info, stat, 1); 619 *update = 1; 620 } 621 622 if (status.skb) { 623 info = *status.info; 624 len = status.skb->len; 625 ac = skb_get_queue_mapping(status.skb); 626 mt76_tx_status_skb_done(mdev, status.skb, &list); 627 } else if (msta) { 628 len = status.info->status.ampdu_len * ewma_pktlen_read(&msta->pktlen); 629 ac = FIELD_GET(MT_PKTID_AC, cur_pktid); 630 } 631 632 mt76_tx_status_unlock(mdev, &list); 633 634 if (!status.skb) { 635 spin_lock_bh(&dev->mt76.rx_lock); 636 ieee80211_tx_status_ext(mt76_hw(dev), &status); 637 spin_unlock_bh(&dev->mt76.rx_lock); 638 } 639 640 if (!len) 641 goto out; 642 643 duration = ieee80211_calc_tx_airtime(mt76_hw(dev), &info, len); 644 645 spin_lock_bh(&dev->mt76.cc_lock); 646 dev->tx_airtime += duration; 647 spin_unlock_bh(&dev->mt76.cc_lock); 648 649 if (msta) 650 ieee80211_sta_register_airtime(status.sta, ac_to_tid[ac], duration, 0); 651 652 out: 653 rcu_read_unlock(); 654 } 655 656 static int 657 mt76x02_mac_process_rate(struct mt76x02_dev *dev, 658 struct mt76_rx_status *status, 659 u16 rate) 660 { 661 u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate); 662 663 switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) { 664 case MT_PHY_TYPE_OFDM: 665 if (idx >= 8) 666 idx = 0; 667 668 if (status->band == NL80211_BAND_2GHZ) 669 idx += 4; 670 671 status->rate_idx = idx; 672 return 0; 673 case MT_PHY_TYPE_CCK: 674 if (idx >= 8) { 675 idx -= 8; 676 status->enc_flags |= RX_ENC_FLAG_SHORTPRE; 677 } 678 679 if (idx >= 4) 680 idx = 0; 681 682 status->rate_idx = idx; 683 return 0; 684 case MT_PHY_TYPE_HT_GF: 685 status->enc_flags |= RX_ENC_FLAG_HT_GF; 686 fallthrough; 687 case MT_PHY_TYPE_HT: 688 status->encoding = RX_ENC_HT; 689 status->rate_idx = idx; 690 break; 691 case MT_PHY_TYPE_VHT: { 692 u8 n_rxstream = dev->mphy.chainmask & 0xf; 693 694 status->encoding = RX_ENC_VHT; 695 status->rate_idx = FIELD_GET(MT_RATE_INDEX_VHT_IDX, idx); 696 status->nss = min_t(u8, n_rxstream, 697 FIELD_GET(MT_RATE_INDEX_VHT_NSS, idx) + 1); 698 break; 699 } 700 default: 701 return -EINVAL; 702 } 703 704 if (rate & MT_RXWI_RATE_LDPC) 705 status->enc_flags |= RX_ENC_FLAG_LDPC; 706 707 if (rate & MT_RXWI_RATE_SGI) 708 status->enc_flags |= RX_ENC_FLAG_SHORT_GI; 709 710 if (rate & MT_RXWI_RATE_STBC) 711 status->enc_flags |= 1 << RX_ENC_FLAG_STBC_SHIFT; 712 713 switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) { 714 case MT_PHY_BW_20: 715 break; 716 case MT_PHY_BW_40: 717 status->bw = RATE_INFO_BW_40; 718 break; 719 case MT_PHY_BW_80: 720 status->bw = RATE_INFO_BW_80; 721 break; 722 default: 723 break; 724 } 725 726 return 0; 727 } 728 729 void mt76x02_mac_setaddr(struct mt76x02_dev *dev, const u8 *addr) 730 { 731 static const u8 null_addr[ETH_ALEN] = {}; 732 int i; 733 734 ether_addr_copy(dev->mphy.macaddr, addr); 735 736 if (!is_valid_ether_addr(dev->mphy.macaddr)) { 737 eth_random_addr(dev->mphy.macaddr); 738 dev_info(dev->mt76.dev, 739 "Invalid MAC address, using random address %pM\n", 740 dev->mphy.macaddr); 741 } 742 743 mt76_wr(dev, MT_MAC_ADDR_DW0, get_unaligned_le32(dev->mphy.macaddr)); 744 mt76_wr(dev, MT_MAC_ADDR_DW1, 745 get_unaligned_le16(dev->mphy.macaddr + 4) | 746 FIELD_PREP(MT_MAC_ADDR_DW1_U2ME_MASK, 0xff)); 747 748 mt76_wr(dev, MT_MAC_BSSID_DW0, 749 get_unaligned_le32(dev->mphy.macaddr)); 750 mt76_wr(dev, MT_MAC_BSSID_DW1, 751 get_unaligned_le16(dev->mphy.macaddr + 4) | 752 FIELD_PREP(MT_MAC_BSSID_DW1_MBSS_MODE, 3) | /* 8 APs + 8 STAs */ 753 MT_MAC_BSSID_DW1_MBSS_LOCAL_BIT); 754 /* enable 7 additional beacon slots and control them with bypass mask */ 755 mt76_rmw_field(dev, MT_MAC_BSSID_DW1, MT_MAC_BSSID_DW1_MBEACON_N, 7); 756 757 for (i = 0; i < 16; i++) 758 mt76x02_mac_set_bssid(dev, i, null_addr); 759 } 760 EXPORT_SYMBOL_GPL(mt76x02_mac_setaddr); 761 762 static int 763 mt76x02_mac_get_rssi(struct mt76x02_dev *dev, s8 rssi, int chain) 764 { 765 struct mt76x02_rx_freq_cal *cal = &dev->cal.rx; 766 767 rssi += cal->rssi_offset[chain]; 768 rssi -= cal->lna_gain; 769 770 return rssi; 771 } 772 773 int mt76x02_mac_process_rx(struct mt76x02_dev *dev, struct sk_buff *skb, 774 void *rxi) 775 { 776 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; 777 struct ieee80211_hdr *hdr; 778 struct mt76x02_rxwi *rxwi = rxi; 779 struct mt76x02_sta *sta; 780 u32 rxinfo = le32_to_cpu(rxwi->rxinfo); 781 u32 ctl = le32_to_cpu(rxwi->ctl); 782 u16 rate = le16_to_cpu(rxwi->rate); 783 u16 tid_sn = le16_to_cpu(rxwi->tid_sn); 784 bool unicast = rxwi->rxinfo & cpu_to_le32(MT_RXINFO_UNICAST); 785 int pad_len = 0, nstreams = dev->mphy.chainmask & 0xf; 786 s8 signal; 787 u8 pn_len; 788 u8 wcid; 789 int len; 790 791 if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state)) 792 return -EINVAL; 793 794 if (rxinfo & MT_RXINFO_L2PAD) 795 pad_len += 2; 796 797 if (rxinfo & MT_RXINFO_DECRYPT) { 798 status->flag |= RX_FLAG_DECRYPTED; 799 status->flag |= RX_FLAG_MMIC_STRIPPED; 800 status->flag |= RX_FLAG_MIC_STRIPPED; 801 status->flag |= RX_FLAG_IV_STRIPPED; 802 } 803 804 wcid = FIELD_GET(MT_RXWI_CTL_WCID, ctl); 805 sta = mt76x02_rx_get_sta(&dev->mt76, wcid); 806 status->wcid = mt76x02_rx_get_sta_wcid(sta, unicast); 807 808 len = FIELD_GET(MT_RXWI_CTL_MPDU_LEN, ctl); 809 pn_len = FIELD_GET(MT_RXINFO_PN_LEN, rxinfo); 810 if (pn_len) { 811 int offset = ieee80211_get_hdrlen_from_skb(skb) + pad_len; 812 u8 *data = skb->data + offset; 813 814 status->iv[0] = data[7]; 815 status->iv[1] = data[6]; 816 status->iv[2] = data[5]; 817 status->iv[3] = data[4]; 818 status->iv[4] = data[1]; 819 status->iv[5] = data[0]; 820 821 /* 822 * Driver CCMP validation can't deal with fragments. 823 * Let mac80211 take care of it. 824 */ 825 if (rxinfo & MT_RXINFO_FRAG) { 826 status->flag &= ~RX_FLAG_IV_STRIPPED; 827 } else { 828 pad_len += pn_len << 2; 829 len -= pn_len << 2; 830 } 831 } 832 833 mt76x02_remove_hdr_pad(skb, pad_len); 834 835 if ((rxinfo & MT_RXINFO_BA) && !(rxinfo & MT_RXINFO_NULL)) 836 status->aggr = true; 837 838 if (rxinfo & MT_RXINFO_AMPDU) { 839 status->flag |= RX_FLAG_AMPDU_DETAILS; 840 status->ampdu_ref = dev->ampdu_ref; 841 842 /* 843 * When receiving an A-MPDU subframe and RSSI info is not valid, 844 * we can assume that more subframes belonging to the same A-MPDU 845 * are coming. The last one will have valid RSSI info 846 */ 847 if (rxinfo & MT_RXINFO_RSSI) { 848 if (!++dev->ampdu_ref) 849 dev->ampdu_ref++; 850 } 851 } 852 853 if (WARN_ON_ONCE(len > skb->len)) 854 return -EINVAL; 855 856 if (pskb_trim(skb, len)) 857 return -EINVAL; 858 859 status->chains = BIT(0); 860 signal = mt76x02_mac_get_rssi(dev, rxwi->rssi[0], 0); 861 status->chain_signal[0] = signal; 862 if (nstreams > 1) { 863 status->chains |= BIT(1); 864 status->chain_signal[1] = mt76x02_mac_get_rssi(dev, 865 rxwi->rssi[1], 866 1); 867 } 868 status->freq = dev->mphy.chandef.chan->center_freq; 869 status->band = dev->mphy.chandef.chan->band; 870 871 hdr = (struct ieee80211_hdr *)skb->data; 872 status->qos_ctl = *ieee80211_get_qos_ctl(hdr); 873 status->seqno = FIELD_GET(MT_RXWI_SN, tid_sn); 874 875 return mt76x02_mac_process_rate(dev, status, rate); 876 } 877 878 void mt76x02_mac_poll_tx_status(struct mt76x02_dev *dev, bool irq) 879 { 880 struct mt76x02_tx_status stat = {}; 881 u8 update = 1; 882 bool ret; 883 884 if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state)) 885 return; 886 887 trace_mac_txstat_poll(dev); 888 889 while (!irq || !kfifo_is_full(&dev->txstatus_fifo)) { 890 if (!spin_trylock(&dev->txstatus_fifo_lock)) 891 break; 892 893 ret = mt76x02_mac_load_tx_status(dev, &stat); 894 spin_unlock(&dev->txstatus_fifo_lock); 895 896 if (!ret) 897 break; 898 899 if (!irq) { 900 mt76x02_send_tx_status(dev, &stat, &update); 901 continue; 902 } 903 904 kfifo_put(&dev->txstatus_fifo, stat); 905 } 906 } 907 908 void mt76x02_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e) 909 { 910 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); 911 struct mt76x02_txwi *txwi; 912 u8 *txwi_ptr; 913 914 if (!e->txwi) { 915 dev_kfree_skb_any(e->skb); 916 return; 917 } 918 919 mt76x02_mac_poll_tx_status(dev, false); 920 921 txwi_ptr = mt76_get_txwi_ptr(mdev, e->txwi); 922 txwi = (struct mt76x02_txwi *)txwi_ptr; 923 trace_mac_txdone(mdev, txwi->wcid, txwi->pktid); 924 925 mt76_tx_complete_skb(mdev, e->wcid, e->skb); 926 } 927 EXPORT_SYMBOL_GPL(mt76x02_tx_complete_skb); 928 929 void mt76x02_mac_set_rts_thresh(struct mt76x02_dev *dev, u32 val) 930 { 931 u32 data = 0; 932 933 if (val != ~0) 934 data = FIELD_PREP(MT_PROT_CFG_CTRL, 1) | 935 MT_PROT_CFG_RTS_THRESH; 936 937 mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, val); 938 939 mt76_rmw(dev, MT_CCK_PROT_CFG, 940 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data); 941 mt76_rmw(dev, MT_OFDM_PROT_CFG, 942 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data); 943 } 944 945 void mt76x02_mac_set_tx_protection(struct mt76x02_dev *dev, bool legacy_prot, 946 int ht_mode) 947 { 948 int mode = ht_mode & IEEE80211_HT_OP_MODE_PROTECTION; 949 bool non_gf = !!(ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT); 950 u32 prot[6]; 951 u32 vht_prot[3]; 952 int i; 953 u16 rts_thr; 954 955 for (i = 0; i < ARRAY_SIZE(prot); i++) { 956 prot[i] = mt76_rr(dev, MT_CCK_PROT_CFG + i * 4); 957 prot[i] &= ~MT_PROT_CFG_CTRL; 958 if (i >= 2) 959 prot[i] &= ~MT_PROT_CFG_RATE; 960 } 961 962 for (i = 0; i < ARRAY_SIZE(vht_prot); i++) { 963 vht_prot[i] = mt76_rr(dev, MT_TX_PROT_CFG6 + i * 4); 964 vht_prot[i] &= ~(MT_PROT_CFG_CTRL | MT_PROT_CFG_RATE); 965 } 966 967 rts_thr = mt76_get_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH); 968 969 if (rts_thr != 0xffff) 970 prot[0] |= MT_PROT_CTRL_RTS_CTS; 971 972 if (legacy_prot) { 973 prot[1] |= MT_PROT_CTRL_CTS2SELF; 974 975 prot[2] |= MT_PROT_RATE_CCK_11; 976 prot[3] |= MT_PROT_RATE_CCK_11; 977 prot[4] |= MT_PROT_RATE_CCK_11; 978 prot[5] |= MT_PROT_RATE_CCK_11; 979 980 vht_prot[0] |= MT_PROT_RATE_CCK_11; 981 vht_prot[1] |= MT_PROT_RATE_CCK_11; 982 vht_prot[2] |= MT_PROT_RATE_CCK_11; 983 } else { 984 if (rts_thr != 0xffff) 985 prot[1] |= MT_PROT_CTRL_RTS_CTS; 986 987 prot[2] |= MT_PROT_RATE_OFDM_24; 988 prot[3] |= MT_PROT_RATE_DUP_OFDM_24; 989 prot[4] |= MT_PROT_RATE_OFDM_24; 990 prot[5] |= MT_PROT_RATE_DUP_OFDM_24; 991 992 vht_prot[0] |= MT_PROT_RATE_OFDM_24; 993 vht_prot[1] |= MT_PROT_RATE_DUP_OFDM_24; 994 vht_prot[2] |= MT_PROT_RATE_SGI_OFDM_24; 995 } 996 997 switch (mode) { 998 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 999 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 1000 prot[2] |= MT_PROT_CTRL_RTS_CTS; 1001 prot[3] |= MT_PROT_CTRL_RTS_CTS; 1002 prot[4] |= MT_PROT_CTRL_RTS_CTS; 1003 prot[5] |= MT_PROT_CTRL_RTS_CTS; 1004 vht_prot[0] |= MT_PROT_CTRL_RTS_CTS; 1005 vht_prot[1] |= MT_PROT_CTRL_RTS_CTS; 1006 vht_prot[2] |= MT_PROT_CTRL_RTS_CTS; 1007 break; 1008 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 1009 prot[3] |= MT_PROT_CTRL_RTS_CTS; 1010 prot[5] |= MT_PROT_CTRL_RTS_CTS; 1011 vht_prot[1] |= MT_PROT_CTRL_RTS_CTS; 1012 vht_prot[2] |= MT_PROT_CTRL_RTS_CTS; 1013 break; 1014 } 1015 1016 if (non_gf) { 1017 prot[4] |= MT_PROT_CTRL_RTS_CTS; 1018 prot[5] |= MT_PROT_CTRL_RTS_CTS; 1019 } 1020 1021 for (i = 0; i < ARRAY_SIZE(prot); i++) 1022 mt76_wr(dev, MT_CCK_PROT_CFG + i * 4, prot[i]); 1023 1024 for (i = 0; i < ARRAY_SIZE(vht_prot); i++) 1025 mt76_wr(dev, MT_TX_PROT_CFG6 + i * 4, vht_prot[i]); 1026 } 1027 1028 void mt76x02_update_channel(struct mt76_phy *mphy) 1029 { 1030 struct mt76x02_dev *dev = container_of(mphy->dev, struct mt76x02_dev, mt76); 1031 struct mt76_channel_state *state; 1032 1033 state = mphy->chan_state; 1034 state->cc_busy += mt76_rr(dev, MT_CH_BUSY); 1035 1036 spin_lock_bh(&dev->mt76.cc_lock); 1037 state->cc_tx += dev->tx_airtime; 1038 dev->tx_airtime = 0; 1039 spin_unlock_bh(&dev->mt76.cc_lock); 1040 } 1041 EXPORT_SYMBOL_GPL(mt76x02_update_channel); 1042 1043 static void mt76x02_check_mac_err(struct mt76x02_dev *dev) 1044 { 1045 if (dev->mt76.beacon_mask) { 1046 if (mt76_rr(dev, MT_TX_STA_0) & MT_TX_STA_0_BEACONS) { 1047 dev->beacon_hang_check = 0; 1048 return; 1049 } 1050 1051 if (dev->beacon_hang_check < 10) 1052 return; 1053 1054 } else { 1055 u32 val = mt76_rr(dev, 0x10f4); 1056 if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5)))) 1057 return; 1058 } 1059 1060 dev_err(dev->mt76.dev, "MAC error detected\n"); 1061 1062 mt76_wr(dev, MT_MAC_SYS_CTRL, 0); 1063 if (!mt76x02_wait_for_txrx_idle(&dev->mt76)) { 1064 dev_err(dev->mt76.dev, "MAC stop failed\n"); 1065 goto out; 1066 } 1067 1068 dev->beacon_hang_check = 0; 1069 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR); 1070 udelay(10); 1071 1072 out: 1073 mt76_wr(dev, MT_MAC_SYS_CTRL, 1074 MT_MAC_SYS_CTRL_ENABLE_TX | MT_MAC_SYS_CTRL_ENABLE_RX); 1075 } 1076 1077 static void 1078 mt76x02_edcca_tx_enable(struct mt76x02_dev *dev, bool enable) 1079 { 1080 if (enable) { 1081 u32 data; 1082 1083 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX); 1084 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN); 1085 /* enable pa-lna */ 1086 data = mt76_rr(dev, MT_TX_PIN_CFG); 1087 data |= MT_TX_PIN_CFG_TXANT | 1088 MT_TX_PIN_CFG_RXANT | 1089 MT_TX_PIN_RFTR_EN | 1090 MT_TX_PIN_TRSW_EN; 1091 mt76_wr(dev, MT_TX_PIN_CFG, data); 1092 } else { 1093 mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX); 1094 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN); 1095 /* disable pa-lna */ 1096 mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT); 1097 mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_RXANT); 1098 } 1099 dev->ed_tx_blocked = !enable; 1100 } 1101 1102 void mt76x02_edcca_init(struct mt76x02_dev *dev) 1103 { 1104 dev->ed_trigger = 0; 1105 dev->ed_silent = 0; 1106 1107 if (dev->ed_monitor) { 1108 struct ieee80211_channel *chan = dev->mphy.chandef.chan; 1109 u8 ed_th = chan->band == NL80211_BAND_5GHZ ? 0x0e : 0x20; 1110 1111 mt76_clear(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN); 1112 mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN); 1113 mt76_rmw(dev, MT_BBP(AGC, 2), GENMASK(15, 0), 1114 ed_th << 8 | ed_th); 1115 mt76_set(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN); 1116 } else { 1117 mt76_set(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN); 1118 mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN); 1119 if (is_mt76x2(dev)) { 1120 mt76_wr(dev, MT_BBP(AGC, 2), 0x00007070); 1121 mt76_set(dev, MT_TXOP_HLDR_ET, 1122 MT_TXOP_HLDR_TX40M_BLK_EN); 1123 } else { 1124 mt76_wr(dev, MT_BBP(AGC, 2), 0x003a6464); 1125 mt76_clear(dev, MT_TXOP_HLDR_ET, 1126 MT_TXOP_HLDR_TX40M_BLK_EN); 1127 } 1128 } 1129 mt76x02_edcca_tx_enable(dev, true); 1130 dev->ed_monitor_learning = true; 1131 1132 /* clear previous CCA timer value */ 1133 mt76_rr(dev, MT_ED_CCA_TIMER); 1134 dev->ed_time = ktime_get_boottime(); 1135 } 1136 EXPORT_SYMBOL_GPL(mt76x02_edcca_init); 1137 1138 #define MT_EDCCA_TH 92 1139 #define MT_EDCCA_BLOCK_TH 2 1140 #define MT_EDCCA_LEARN_TH 50 1141 #define MT_EDCCA_LEARN_CCA 180 1142 #define MT_EDCCA_LEARN_TIMEOUT (20 * HZ) 1143 1144 static void mt76x02_edcca_check(struct mt76x02_dev *dev) 1145 { 1146 ktime_t cur_time; 1147 u32 active, val, busy; 1148 1149 cur_time = ktime_get_boottime(); 1150 val = mt76_rr(dev, MT_ED_CCA_TIMER); 1151 1152 active = ktime_to_us(ktime_sub(cur_time, dev->ed_time)); 1153 dev->ed_time = cur_time; 1154 1155 busy = (val * 100) / active; 1156 busy = min_t(u32, busy, 100); 1157 1158 if (busy > MT_EDCCA_TH) { 1159 dev->ed_trigger++; 1160 dev->ed_silent = 0; 1161 } else { 1162 dev->ed_silent++; 1163 dev->ed_trigger = 0; 1164 } 1165 1166 if (dev->cal.agc_lowest_gain && 1167 dev->cal.false_cca > MT_EDCCA_LEARN_CCA && 1168 dev->ed_trigger > MT_EDCCA_LEARN_TH) { 1169 dev->ed_monitor_learning = false; 1170 dev->ed_trigger_timeout = jiffies + 20 * HZ; 1171 } else if (!dev->ed_monitor_learning && 1172 time_is_after_jiffies(dev->ed_trigger_timeout)) { 1173 dev->ed_monitor_learning = true; 1174 mt76x02_edcca_tx_enable(dev, true); 1175 } 1176 1177 if (dev->ed_monitor_learning) 1178 return; 1179 1180 if (dev->ed_trigger > MT_EDCCA_BLOCK_TH && !dev->ed_tx_blocked) 1181 mt76x02_edcca_tx_enable(dev, false); 1182 else if (dev->ed_silent > MT_EDCCA_BLOCK_TH && dev->ed_tx_blocked) 1183 mt76x02_edcca_tx_enable(dev, true); 1184 } 1185 1186 void mt76x02_mac_work(struct work_struct *work) 1187 { 1188 struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev, 1189 mphy.mac_work.work); 1190 int i, idx; 1191 1192 mutex_lock(&dev->mt76.mutex); 1193 1194 mt76_update_survey(&dev->mphy); 1195 for (i = 0, idx = 0; i < 16; i++) { 1196 u32 val = mt76_rr(dev, MT_TX_AGG_CNT(i)); 1197 1198 dev->mphy.aggr_stats[idx++] += val & 0xffff; 1199 dev->mphy.aggr_stats[idx++] += val >> 16; 1200 } 1201 1202 mt76x02_check_mac_err(dev); 1203 1204 if (dev->ed_monitor) 1205 mt76x02_edcca_check(dev); 1206 1207 mutex_unlock(&dev->mt76.mutex); 1208 1209 mt76_tx_status_check(&dev->mt76, false); 1210 1211 ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work, 1212 MT_MAC_WORK_INTERVAL); 1213 } 1214 1215 void mt76x02_mac_cc_reset(struct mt76x02_dev *dev) 1216 { 1217 dev->mphy.survey_time = ktime_get_boottime(); 1218 1219 mt76_wr(dev, MT_CH_TIME_CFG, 1220 MT_CH_TIME_CFG_TIMER_EN | 1221 MT_CH_TIME_CFG_TX_AS_BUSY | 1222 MT_CH_TIME_CFG_RX_AS_BUSY | 1223 MT_CH_TIME_CFG_NAV_AS_BUSY | 1224 MT_CH_TIME_CFG_EIFS_AS_BUSY | 1225 MT_CH_CCA_RC_EN | 1226 FIELD_PREP(MT_CH_TIME_CFG_CH_TIMER_CLR, 1)); 1227 1228 /* channel cycle counters read-and-clear */ 1229 mt76_rr(dev, MT_CH_BUSY); 1230 mt76_rr(dev, MT_CH_IDLE); 1231 } 1232 EXPORT_SYMBOL_GPL(mt76x02_mac_cc_reset); 1233 1234 void mt76x02_mac_set_bssid(struct mt76x02_dev *dev, u8 idx, const u8 *addr) 1235 { 1236 idx &= 7; 1237 mt76_wr(dev, MT_MAC_APC_BSSID_L(idx), get_unaligned_le32(addr)); 1238 mt76_rmw_field(dev, MT_MAC_APC_BSSID_H(idx), MT_MAC_APC_BSSID_H_ADDR, 1239 get_unaligned_le16(addr + 4)); 1240 } 1241