// SPDX-License-Identifier: ISC /* * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl> */ #include "mt76x02.h" #include "mt76x02_trace.h" #include "trace.h" void mt76x02_mac_reset_counters(struct mt76x02_dev *dev) { int i; mt76_rr(dev, MT_RX_STAT_0); mt76_rr(dev, MT_RX_STAT_1); mt76_rr(dev, MT_RX_STAT_2); mt76_rr(dev, MT_TX_STA_0); mt76_rr(dev, MT_TX_STA_1); mt76_rr(dev, MT_TX_STA_2); for (i = 0; i < 16; i++) mt76_rr(dev, MT_TX_AGG_CNT(i)); for (i = 0; i < 16; i++) mt76_rr(dev, MT_TX_STAT_FIFO); memset(dev->mt76.aggr_stats, 0, sizeof(dev->mt76.aggr_stats)); } EXPORT_SYMBOL_GPL(mt76x02_mac_reset_counters); static enum mt76x02_cipher_type mt76x02_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data) { memset(key_data, 0, 32); if (!key) return MT76X02_CIPHER_NONE; if (key->keylen > 32) return MT76X02_CIPHER_NONE; memcpy(key_data, key->key, key->keylen); switch (key->cipher) { case WLAN_CIPHER_SUITE_WEP40: return MT76X02_CIPHER_WEP40; case WLAN_CIPHER_SUITE_WEP104: return MT76X02_CIPHER_WEP104; case WLAN_CIPHER_SUITE_TKIP: return MT76X02_CIPHER_TKIP; case WLAN_CIPHER_SUITE_CCMP: return MT76X02_CIPHER_AES_CCMP; default: return MT76X02_CIPHER_NONE; } } int mt76x02_mac_shared_key_setup(struct mt76x02_dev *dev, u8 vif_idx, u8 key_idx, struct ieee80211_key_conf *key) { enum mt76x02_cipher_type cipher; u8 key_data[32]; u32 val; cipher = mt76x02_mac_get_key_info(key, key_data); if (cipher == MT76X02_CIPHER_NONE && key) return -EOPNOTSUPP; val = mt76_rr(dev, MT_SKEY_MODE(vif_idx)); val &= ~(MT_SKEY_MODE_MASK << MT_SKEY_MODE_SHIFT(vif_idx, key_idx)); val |= cipher << MT_SKEY_MODE_SHIFT(vif_idx, key_idx); mt76_wr(dev, MT_SKEY_MODE(vif_idx), val); mt76_wr_copy(dev, MT_SKEY(vif_idx, key_idx), key_data, sizeof(key_data)); return 0; } EXPORT_SYMBOL_GPL(mt76x02_mac_shared_key_setup); void mt76x02_mac_wcid_sync_pn(struct mt76x02_dev *dev, u8 idx, struct ieee80211_key_conf *key) { enum mt76x02_cipher_type cipher; u8 key_data[32]; u32 iv, eiv; u64 pn; cipher = mt76x02_mac_get_key_info(key, key_data); iv = mt76_rr(dev, MT_WCID_IV(idx)); eiv = mt76_rr(dev, MT_WCID_IV(idx) + 4); pn = (u64)eiv << 16; if (cipher == MT76X02_CIPHER_TKIP) { pn |= (iv >> 16) & 0xff; pn |= (iv & 0xff) << 8; } else if (cipher >= MT76X02_CIPHER_AES_CCMP) { pn |= iv & 0xffff; } else { return; } atomic64_set(&key->tx_pn, pn); } int mt76x02_mac_wcid_set_key(struct mt76x02_dev *dev, u8 idx, struct ieee80211_key_conf *key) { enum mt76x02_cipher_type cipher; u8 key_data[32]; u8 iv_data[8]; u64 pn; cipher = mt76x02_mac_get_key_info(key, key_data); if (cipher == MT76X02_CIPHER_NONE && key) return -EOPNOTSUPP; mt76_wr_copy(dev, MT_WCID_KEY(idx), key_data, sizeof(key_data)); mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PKEY_MODE, cipher); memset(iv_data, 0, sizeof(iv_data)); if (key) { mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PAIRWISE, !!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)); pn = atomic64_read(&key->tx_pn); iv_data[3] = key->keyidx << 6; if (cipher >= MT76X02_CIPHER_TKIP) { iv_data[3] |= 0x20; put_unaligned_le32(pn >> 16, &iv_data[4]); } if (cipher == MT76X02_CIPHER_TKIP) { iv_data[0] = (pn >> 8) & 0xff; iv_data[1] = (iv_data[0] | 0x20) & 0x7f; iv_data[2] = pn & 0xff; } else if (cipher >= MT76X02_CIPHER_AES_CCMP) { put_unaligned_le16((pn & 0xffff), &iv_data[0]); } } mt76_wr_copy(dev, MT_WCID_IV(idx), iv_data, sizeof(iv_data)); return 0; } void mt76x02_mac_wcid_setup(struct mt76x02_dev *dev, u8 idx, u8 vif_idx, u8 *mac) { struct mt76_wcid_addr addr = {}; u32 attr; attr = FIELD_PREP(MT_WCID_ATTR_BSS_IDX, vif_idx & 7) | FIELD_PREP(MT_WCID_ATTR_BSS_IDX_EXT, !!(vif_idx & 8)); mt76_wr(dev, MT_WCID_ATTR(idx), attr); if (idx >= 128) return; if (mac) memcpy(addr.macaddr, mac, ETH_ALEN); mt76_wr_copy(dev, MT_WCID_ADDR(idx), &addr, sizeof(addr)); } EXPORT_SYMBOL_GPL(mt76x02_mac_wcid_setup); void mt76x02_mac_wcid_set_drop(struct mt76x02_dev *dev, u8 idx, bool drop) { u32 val = mt76_rr(dev, MT_WCID_DROP(idx)); u32 bit = MT_WCID_DROP_MASK(idx); /* prevent unnecessary writes */ if ((val & bit) != (bit * drop)) mt76_wr(dev, MT_WCID_DROP(idx), (val & ~bit) | (bit * drop)); } static u16 mt76x02_mac_tx_rate_val(struct mt76x02_dev *dev, const struct ieee80211_tx_rate *rate, u8 *nss_val) { u8 phy, rate_idx, nss, bw = 0; u16 rateval; if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { rate_idx = rate->idx; nss = 1 + (rate->idx >> 4); phy = MT_PHY_TYPE_VHT; if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH) bw = 2; else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) bw = 1; } else if (rate->flags & IEEE80211_TX_RC_MCS) { rate_idx = rate->idx; nss = 1 + (rate->idx >> 3); phy = MT_PHY_TYPE_HT; if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD) phy = MT_PHY_TYPE_HT_GF; if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) bw = 1; } else { const struct ieee80211_rate *r; int band = dev->mphy.chandef.chan->band; u16 val; r = &dev->mt76.hw->wiphy->bands[band]->bitrates[rate->idx]; if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) val = r->hw_value_short; else val = r->hw_value; phy = val >> 8; rate_idx = val & 0xff; nss = 1; } rateval = FIELD_PREP(MT_RXWI_RATE_INDEX, rate_idx); rateval |= FIELD_PREP(MT_RXWI_RATE_PHY, phy); rateval |= FIELD_PREP(MT_RXWI_RATE_BW, bw); if (rate->flags & IEEE80211_TX_RC_SHORT_GI) rateval |= MT_RXWI_RATE_SGI; *nss_val = nss; return rateval; } void mt76x02_mac_wcid_set_rate(struct mt76x02_dev *dev, struct mt76_wcid *wcid, const struct ieee80211_tx_rate *rate) { s8 max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate); u16 rateval; u32 tx_info; s8 nss; rateval = mt76x02_mac_tx_rate_val(dev, rate, &nss); tx_info = FIELD_PREP(MT_WCID_TX_INFO_RATE, rateval) | FIELD_PREP(MT_WCID_TX_INFO_NSS, nss) | FIELD_PREP(MT_WCID_TX_INFO_TXPWR_ADJ, max_txpwr_adj) | MT_WCID_TX_INFO_SET; wcid->tx_info = tx_info; } void mt76x02_mac_set_short_preamble(struct mt76x02_dev *dev, bool enable) { if (enable) mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT); else mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT); } bool mt76x02_mac_load_tx_status(struct mt76x02_dev *dev, struct mt76x02_tx_status *stat) { u32 stat1, stat2; stat2 = mt76_rr(dev, MT_TX_STAT_FIFO_EXT); stat1 = mt76_rr(dev, MT_TX_STAT_FIFO); stat->valid = !!(stat1 & MT_TX_STAT_FIFO_VALID); if (!stat->valid) return false; stat->success = !!(stat1 & MT_TX_STAT_FIFO_SUCCESS); stat->aggr = !!(stat1 & MT_TX_STAT_FIFO_AGGR); stat->ack_req = !!(stat1 & MT_TX_STAT_FIFO_ACKREQ); stat->wcid = FIELD_GET(MT_TX_STAT_FIFO_WCID, stat1); stat->rate = FIELD_GET(MT_TX_STAT_FIFO_RATE, stat1); stat->retry = FIELD_GET(MT_TX_STAT_FIFO_EXT_RETRY, stat2); stat->pktid = FIELD_GET(MT_TX_STAT_FIFO_EXT_PKTID, stat2); trace_mac_txstat_fetch(dev, stat); return true; } static int mt76x02_mac_process_tx_rate(struct ieee80211_tx_rate *txrate, u16 rate, enum nl80211_band band) { u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate); txrate->idx = 0; txrate->flags = 0; txrate->count = 1; switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) { case MT_PHY_TYPE_OFDM: if (band == NL80211_BAND_2GHZ) idx += 4; txrate->idx = idx; return 0; case MT_PHY_TYPE_CCK: if (idx >= 8) idx -= 8; txrate->idx = idx; return 0; case MT_PHY_TYPE_HT_GF: txrate->flags |= IEEE80211_TX_RC_GREEN_FIELD; fallthrough; case MT_PHY_TYPE_HT: txrate->flags |= IEEE80211_TX_RC_MCS; txrate->idx = idx; break; case MT_PHY_TYPE_VHT: txrate->flags |= IEEE80211_TX_RC_VHT_MCS; txrate->idx = idx; break; default: return -EINVAL; } switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) { case MT_PHY_BW_20: break; case MT_PHY_BW_40: txrate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; break; case MT_PHY_BW_80: txrate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; break; default: return -EINVAL; } if (rate & MT_RXWI_RATE_SGI) txrate->flags |= IEEE80211_TX_RC_SHORT_GI; return 0; } void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi, struct sk_buff *skb, struct mt76_wcid *wcid, struct ieee80211_sta *sta, int len) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct ieee80211_tx_rate *rate = &info->control.rates[0]; struct ieee80211_key_conf *key = info->control.hw_key; u32 wcid_tx_info; u16 rate_ht_mask = FIELD_PREP(MT_RXWI_RATE_PHY, BIT(1) | BIT(2)); u16 txwi_flags = 0, rateval; u8 nss; s8 txpwr_adj, max_txpwr_adj; u8 ccmp_pn[8], nstreams = dev->mphy.chainmask & 0xf; memset(txwi, 0, sizeof(*txwi)); mt76_tx_check_agg_ssn(sta, skb); if (!info->control.hw_key && wcid && wcid->hw_key_idx != 0xff && ieee80211_has_protected(hdr->frame_control)) { wcid = NULL; ieee80211_get_tx_rates(info->control.vif, sta, skb, info->control.rates, 1); } if (wcid) txwi->wcid = wcid->idx; else txwi->wcid = 0xff; if (wcid && wcid->sw_iv && key) { u64 pn = atomic64_inc_return(&key->tx_pn); ccmp_pn[0] = pn; ccmp_pn[1] = pn >> 8; ccmp_pn[2] = 0; ccmp_pn[3] = 0x20 | (key->keyidx << 6); ccmp_pn[4] = pn >> 16; ccmp_pn[5] = pn >> 24; ccmp_pn[6] = pn >> 32; ccmp_pn[7] = pn >> 40; txwi->iv = *((__le32 *)&ccmp_pn[0]); txwi->eiv = *((__le32 *)&ccmp_pn[4]); } if (wcid && (rate->idx < 0 || !rate->count)) { wcid_tx_info = wcid->tx_info; rateval = FIELD_GET(MT_WCID_TX_INFO_RATE, wcid_tx_info); max_txpwr_adj = FIELD_GET(MT_WCID_TX_INFO_TXPWR_ADJ, wcid_tx_info); nss = FIELD_GET(MT_WCID_TX_INFO_NSS, wcid_tx_info); } else { rateval = mt76x02_mac_tx_rate_val(dev, rate, &nss); max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate); } txwi->rate = cpu_to_le16(rateval); txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, dev->txpower_conf, max_txpwr_adj); txwi->ctl2 = FIELD_PREP(MT_TX_PWR_ADJ, txpwr_adj); if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E4) txwi->txstream = 0x13; else if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E3 && !(txwi->rate & cpu_to_le16(rate_ht_mask))) txwi->txstream = 0x93; if (is_mt76x2(dev) && (info->flags & IEEE80211_TX_CTL_LDPC)) txwi->rate |= cpu_to_le16(MT_RXWI_RATE_LDPC); if ((info->flags & IEEE80211_TX_CTL_STBC) && nss == 1) txwi->rate |= cpu_to_le16(MT_RXWI_RATE_STBC); if (nss > 1 && sta && sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC) txwi_flags |= MT_TXWI_FLAGS_MMPS; if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) txwi->ack_ctl |= MT_TXWI_ACK_CTL_REQ; if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) txwi->ack_ctl |= MT_TXWI_ACK_CTL_NSEQ; if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) { u8 ba_size = IEEE80211_MIN_AMPDU_BUF; u8 ampdu_density = sta->deflink.ht_cap.ampdu_density; ba_size <<= sta->deflink.ht_cap.ampdu_factor; ba_size = min_t(int, 63, ba_size - 1); if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) ba_size = 0; txwi->ack_ctl |= FIELD_PREP(MT_TXWI_ACK_CTL_BA_WINDOW, ba_size); if (ampdu_density < IEEE80211_HT_MPDU_DENSITY_4) ampdu_density = IEEE80211_HT_MPDU_DENSITY_4; txwi_flags |= MT_TXWI_FLAGS_AMPDU | FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY, ampdu_density); } if (ieee80211_is_probe_resp(hdr->frame_control) || ieee80211_is_beacon(hdr->frame_control)) txwi_flags |= MT_TXWI_FLAGS_TS; txwi->flags |= cpu_to_le16(txwi_flags); txwi->len_ctl = cpu_to_le16(len); } EXPORT_SYMBOL_GPL(mt76x02_mac_write_txwi); static void mt76x02_tx_rate_fallback(struct ieee80211_tx_rate *rates, int idx, int phy) { u8 mcs, nss; if (!idx) return; rates += idx - 1; rates[1] = rates[0]; switch (phy) { case MT_PHY_TYPE_VHT: mcs = ieee80211_rate_get_vht_mcs(rates); nss = ieee80211_rate_get_vht_nss(rates); if (mcs == 0) nss = max_t(int, nss - 1, 1); else mcs--; ieee80211_rate_set_vht(rates + 1, mcs, nss); break; case MT_PHY_TYPE_HT_GF: case MT_PHY_TYPE_HT: /* MCS 8 falls back to MCS 0 */ if (rates[0].idx == 8) { rates[1].idx = 0; break; } fallthrough; default: rates[1].idx = max_t(int, rates[0].idx - 1, 0); break; } } static void mt76x02_mac_fill_tx_status(struct mt76x02_dev *dev, struct mt76x02_sta *msta, struct ieee80211_tx_info *info, struct mt76x02_tx_status *st, int n_frames) { struct ieee80211_tx_rate *rate = info->status.rates; struct ieee80211_tx_rate last_rate; u16 first_rate; int retry = st->retry; int phy; int i; if (!n_frames) return; phy = FIELD_GET(MT_RXWI_RATE_PHY, st->rate); if (st->pktid & MT_PACKET_ID_HAS_RATE) { first_rate = st->rate & ~MT_PKTID_RATE; first_rate |= st->pktid & MT_PKTID_RATE; mt76x02_mac_process_tx_rate(&rate[0], first_rate, dev->mphy.chandef.chan->band); } else if (rate[0].idx < 0) { if (!msta) return; mt76x02_mac_process_tx_rate(&rate[0], msta->wcid.tx_info, dev->mphy.chandef.chan->band); } mt76x02_mac_process_tx_rate(&last_rate, st->rate, dev->mphy.chandef.chan->band); for (i = 0; i < ARRAY_SIZE(info->status.rates); i++) { retry--; if (i + 1 == ARRAY_SIZE(info->status.rates)) { info->status.rates[i] = last_rate; info->status.rates[i].count = max_t(int, retry, 1); break; } mt76x02_tx_rate_fallback(info->status.rates, i, phy); if (info->status.rates[i].idx == last_rate.idx) break; } if (i + 1 < ARRAY_SIZE(info->status.rates)) { info->status.rates[i + 1].idx = -1; info->status.rates[i + 1].count = 0; } info->status.ampdu_len = n_frames; info->status.ampdu_ack_len = st->success ? n_frames : 0; if (st->aggr) info->flags |= IEEE80211_TX_CTL_AMPDU | IEEE80211_TX_STAT_AMPDU; if (!st->ack_req) info->flags |= IEEE80211_TX_CTL_NO_ACK; else if (st->success) info->flags |= IEEE80211_TX_STAT_ACK; } void mt76x02_send_tx_status(struct mt76x02_dev *dev, struct mt76x02_tx_status *stat, u8 *update) { struct ieee80211_tx_info info = {}; struct ieee80211_tx_status status = { .info = &info }; static const u8 ac_to_tid[4] = { [IEEE80211_AC_BE] = 0, [IEEE80211_AC_BK] = 1, [IEEE80211_AC_VI] = 4, [IEEE80211_AC_VO] = 6 }; struct mt76_wcid *wcid = NULL; struct mt76x02_sta *msta = NULL; struct mt76_dev *mdev = &dev->mt76; struct sk_buff_head list; u32 duration = 0; u8 cur_pktid; u32 ac = 0; int len = 0; if (stat->pktid == MT_PACKET_ID_NO_ACK) return; rcu_read_lock(); if (stat->wcid < MT76x02_N_WCIDS) wcid = rcu_dereference(dev->mt76.wcid[stat->wcid]); if (wcid && wcid->sta) { void *priv; priv = msta = container_of(wcid, struct mt76x02_sta, wcid); status.sta = container_of(priv, struct ieee80211_sta, drv_priv); } mt76_tx_status_lock(mdev, &list); if (wcid) { if (mt76_is_skb_pktid(stat->pktid)) status.skb = mt76_tx_status_skb_get(mdev, wcid, stat->pktid, &list); if (status.skb) status.info = IEEE80211_SKB_CB(status.skb); } if (!status.skb && !(stat->pktid & MT_PACKET_ID_HAS_RATE)) { mt76_tx_status_unlock(mdev, &list); goto out; } if (msta && stat->aggr && !status.skb) { u32 stat_val, stat_cache; stat_val = stat->rate; stat_val |= ((u32)stat->retry) << 16; stat_cache = msta->status.rate; stat_cache |= ((u32)msta->status.retry) << 16; if (*update == 0 && stat_val == stat_cache && stat->wcid == msta->status.wcid && msta->n_frames < 32) { msta->n_frames++; mt76_tx_status_unlock(mdev, &list); goto out; } cur_pktid = msta->status.pktid; mt76x02_mac_fill_tx_status(dev, msta, status.info, &msta->status, msta->n_frames); msta->status = *stat; msta->n_frames = 1; *update = 0; } else { cur_pktid = stat->pktid; mt76x02_mac_fill_tx_status(dev, msta, status.info, stat, 1); *update = 1; } if (status.skb) { info = *status.info; len = status.skb->len; ac = skb_get_queue_mapping(status.skb); mt76_tx_status_skb_done(mdev, status.skb, &list); } else if (msta) { len = status.info->status.ampdu_len * ewma_pktlen_read(&msta->pktlen); ac = FIELD_GET(MT_PKTID_AC, cur_pktid); } mt76_tx_status_unlock(mdev, &list); if (!status.skb) ieee80211_tx_status_ext(mt76_hw(dev), &status); if (!len) goto out; duration = ieee80211_calc_tx_airtime(mt76_hw(dev), &info, len); spin_lock_bh(&dev->mt76.cc_lock); dev->tx_airtime += duration; spin_unlock_bh(&dev->mt76.cc_lock); if (msta) ieee80211_sta_register_airtime(status.sta, ac_to_tid[ac], duration, 0); out: rcu_read_unlock(); } static int mt76x02_mac_process_rate(struct mt76x02_dev *dev, struct mt76_rx_status *status, u16 rate) { u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate); switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) { case MT_PHY_TYPE_OFDM: if (idx >= 8) idx = 0; if (status->band == NL80211_BAND_2GHZ) idx += 4; status->rate_idx = idx; return 0; case MT_PHY_TYPE_CCK: if (idx >= 8) { idx -= 8; status->enc_flags |= RX_ENC_FLAG_SHORTPRE; } if (idx >= 4) idx = 0; status->rate_idx = idx; return 0; case MT_PHY_TYPE_HT_GF: status->enc_flags |= RX_ENC_FLAG_HT_GF; fallthrough; case MT_PHY_TYPE_HT: status->encoding = RX_ENC_HT; status->rate_idx = idx; break; case MT_PHY_TYPE_VHT: { u8 n_rxstream = dev->mphy.chainmask & 0xf; status->encoding = RX_ENC_VHT; status->rate_idx = FIELD_GET(MT_RATE_INDEX_VHT_IDX, idx); status->nss = min_t(u8, n_rxstream, FIELD_GET(MT_RATE_INDEX_VHT_NSS, idx) + 1); break; } default: return -EINVAL; } if (rate & MT_RXWI_RATE_LDPC) status->enc_flags |= RX_ENC_FLAG_LDPC; if (rate & MT_RXWI_RATE_SGI) status->enc_flags |= RX_ENC_FLAG_SHORT_GI; if (rate & MT_RXWI_RATE_STBC) status->enc_flags |= 1 << RX_ENC_FLAG_STBC_SHIFT; switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) { case MT_PHY_BW_20: break; case MT_PHY_BW_40: status->bw = RATE_INFO_BW_40; break; case MT_PHY_BW_80: status->bw = RATE_INFO_BW_80; break; default: break; } return 0; } void mt76x02_mac_setaddr(struct mt76x02_dev *dev, const u8 *addr) { static const u8 null_addr[ETH_ALEN] = {}; int i; ether_addr_copy(dev->mphy.macaddr, addr); if (!is_valid_ether_addr(dev->mphy.macaddr)) { eth_random_addr(dev->mphy.macaddr); dev_info(dev->mt76.dev, "Invalid MAC address, using random address %pM\n", dev->mphy.macaddr); } mt76_wr(dev, MT_MAC_ADDR_DW0, get_unaligned_le32(dev->mphy.macaddr)); mt76_wr(dev, MT_MAC_ADDR_DW1, get_unaligned_le16(dev->mphy.macaddr + 4) | FIELD_PREP(MT_MAC_ADDR_DW1_U2ME_MASK, 0xff)); mt76_wr(dev, MT_MAC_BSSID_DW0, get_unaligned_le32(dev->mphy.macaddr)); mt76_wr(dev, MT_MAC_BSSID_DW1, get_unaligned_le16(dev->mphy.macaddr + 4) | FIELD_PREP(MT_MAC_BSSID_DW1_MBSS_MODE, 3) | /* 8 APs + 8 STAs */ MT_MAC_BSSID_DW1_MBSS_LOCAL_BIT); /* enable 7 additional beacon slots and control them with bypass mask */ mt76_rmw_field(dev, MT_MAC_BSSID_DW1, MT_MAC_BSSID_DW1_MBEACON_N, 7); for (i = 0; i < 16; i++) mt76x02_mac_set_bssid(dev, i, null_addr); } EXPORT_SYMBOL_GPL(mt76x02_mac_setaddr); static int mt76x02_mac_get_rssi(struct mt76x02_dev *dev, s8 rssi, int chain) { struct mt76x02_rx_freq_cal *cal = &dev->cal.rx; rssi += cal->rssi_offset[chain]; rssi -= cal->lna_gain; return rssi; } int mt76x02_mac_process_rx(struct mt76x02_dev *dev, struct sk_buff *skb, void *rxi) { struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; struct ieee80211_hdr *hdr; struct mt76x02_rxwi *rxwi = rxi; struct mt76x02_sta *sta; u32 rxinfo = le32_to_cpu(rxwi->rxinfo); u32 ctl = le32_to_cpu(rxwi->ctl); u16 rate = le16_to_cpu(rxwi->rate); u16 tid_sn = le16_to_cpu(rxwi->tid_sn); bool unicast = rxwi->rxinfo & cpu_to_le32(MT_RXINFO_UNICAST); int pad_len = 0, nstreams = dev->mphy.chainmask & 0xf; s8 signal; u8 pn_len; u8 wcid; int len; if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state)) return -EINVAL; if (rxinfo & MT_RXINFO_L2PAD) pad_len += 2; if (rxinfo & MT_RXINFO_DECRYPT) { status->flag |= RX_FLAG_DECRYPTED; status->flag |= RX_FLAG_MMIC_STRIPPED; status->flag |= RX_FLAG_MIC_STRIPPED; status->flag |= RX_FLAG_IV_STRIPPED; } wcid = FIELD_GET(MT_RXWI_CTL_WCID, ctl); sta = mt76x02_rx_get_sta(&dev->mt76, wcid); status->wcid = mt76x02_rx_get_sta_wcid(sta, unicast); len = FIELD_GET(MT_RXWI_CTL_MPDU_LEN, ctl); pn_len = FIELD_GET(MT_RXINFO_PN_LEN, rxinfo); if (pn_len) { int offset = ieee80211_get_hdrlen_from_skb(skb) + pad_len; u8 *data = skb->data + offset; status->iv[0] = data[7]; status->iv[1] = data[6]; status->iv[2] = data[5]; status->iv[3] = data[4]; status->iv[4] = data[1]; status->iv[5] = data[0]; /* * Driver CCMP validation can't deal with fragments. * Let mac80211 take care of it. */ if (rxinfo & MT_RXINFO_FRAG) { status->flag &= ~RX_FLAG_IV_STRIPPED; } else { pad_len += pn_len << 2; len -= pn_len << 2; } } mt76x02_remove_hdr_pad(skb, pad_len); if ((rxinfo & MT_RXINFO_BA) && !(rxinfo & MT_RXINFO_NULL)) status->aggr = true; if (rxinfo & MT_RXINFO_AMPDU) { status->flag |= RX_FLAG_AMPDU_DETAILS; status->ampdu_ref = dev->ampdu_ref; /* * When receiving an A-MPDU subframe and RSSI info is not valid, * we can assume that more subframes belonging to the same A-MPDU * are coming. The last one will have valid RSSI info */ if (rxinfo & MT_RXINFO_RSSI) { if (!++dev->ampdu_ref) dev->ampdu_ref++; } } if (WARN_ON_ONCE(len > skb->len)) return -EINVAL; pskb_trim(skb, len); status->chains = BIT(0); signal = mt76x02_mac_get_rssi(dev, rxwi->rssi[0], 0); status->chain_signal[0] = signal; if (nstreams > 1) { status->chains |= BIT(1); status->chain_signal[1] = mt76x02_mac_get_rssi(dev, rxwi->rssi[1], 1); } status->freq = dev->mphy.chandef.chan->center_freq; status->band = dev->mphy.chandef.chan->band; hdr = (struct ieee80211_hdr *)skb->data; status->qos_ctl = *ieee80211_get_qos_ctl(hdr); status->seqno = FIELD_GET(MT_RXWI_SN, tid_sn); return mt76x02_mac_process_rate(dev, status, rate); } void mt76x02_mac_poll_tx_status(struct mt76x02_dev *dev, bool irq) { struct mt76x02_tx_status stat = {}; u8 update = 1; bool ret; if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state)) return; trace_mac_txstat_poll(dev); while (!irq || !kfifo_is_full(&dev->txstatus_fifo)) { if (!spin_trylock(&dev->txstatus_fifo_lock)) break; ret = mt76x02_mac_load_tx_status(dev, &stat); spin_unlock(&dev->txstatus_fifo_lock); if (!ret) break; if (!irq) { mt76x02_send_tx_status(dev, &stat, &update); continue; } kfifo_put(&dev->txstatus_fifo, stat); } } void mt76x02_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e) { struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); struct mt76x02_txwi *txwi; u8 *txwi_ptr; if (!e->txwi) { dev_kfree_skb_any(e->skb); return; } mt76x02_mac_poll_tx_status(dev, false); txwi_ptr = mt76_get_txwi_ptr(mdev, e->txwi); txwi = (struct mt76x02_txwi *)txwi_ptr; trace_mac_txdone(mdev, txwi->wcid, txwi->pktid); mt76_tx_complete_skb(mdev, e->wcid, e->skb); } EXPORT_SYMBOL_GPL(mt76x02_tx_complete_skb); void mt76x02_mac_set_rts_thresh(struct mt76x02_dev *dev, u32 val) { u32 data = 0; if (val != ~0) data = FIELD_PREP(MT_PROT_CFG_CTRL, 1) | MT_PROT_CFG_RTS_THRESH; mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, val); mt76_rmw(dev, MT_CCK_PROT_CFG, MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data); mt76_rmw(dev, MT_OFDM_PROT_CFG, MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data); } void mt76x02_mac_set_tx_protection(struct mt76x02_dev *dev, bool legacy_prot, int ht_mode) { int mode = ht_mode & IEEE80211_HT_OP_MODE_PROTECTION; bool non_gf = !!(ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT); u32 prot[6]; u32 vht_prot[3]; int i; u16 rts_thr; for (i = 0; i < ARRAY_SIZE(prot); i++) { prot[i] = mt76_rr(dev, MT_CCK_PROT_CFG + i * 4); prot[i] &= ~MT_PROT_CFG_CTRL; if (i >= 2) prot[i] &= ~MT_PROT_CFG_RATE; } for (i = 0; i < ARRAY_SIZE(vht_prot); i++) { vht_prot[i] = mt76_rr(dev, MT_TX_PROT_CFG6 + i * 4); vht_prot[i] &= ~(MT_PROT_CFG_CTRL | MT_PROT_CFG_RATE); } rts_thr = mt76_get_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH); if (rts_thr != 0xffff) prot[0] |= MT_PROT_CTRL_RTS_CTS; if (legacy_prot) { prot[1] |= MT_PROT_CTRL_CTS2SELF; prot[2] |= MT_PROT_RATE_CCK_11; prot[3] |= MT_PROT_RATE_CCK_11; prot[4] |= MT_PROT_RATE_CCK_11; prot[5] |= MT_PROT_RATE_CCK_11; vht_prot[0] |= MT_PROT_RATE_CCK_11; vht_prot[1] |= MT_PROT_RATE_CCK_11; vht_prot[2] |= MT_PROT_RATE_CCK_11; } else { if (rts_thr != 0xffff) prot[1] |= MT_PROT_CTRL_RTS_CTS; prot[2] |= MT_PROT_RATE_OFDM_24; prot[3] |= MT_PROT_RATE_DUP_OFDM_24; prot[4] |= MT_PROT_RATE_OFDM_24; prot[5] |= MT_PROT_RATE_DUP_OFDM_24; vht_prot[0] |= MT_PROT_RATE_OFDM_24; vht_prot[1] |= MT_PROT_RATE_DUP_OFDM_24; vht_prot[2] |= MT_PROT_RATE_SGI_OFDM_24; } switch (mode) { case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: prot[2] |= MT_PROT_CTRL_RTS_CTS; prot[3] |= MT_PROT_CTRL_RTS_CTS; prot[4] |= MT_PROT_CTRL_RTS_CTS; prot[5] |= MT_PROT_CTRL_RTS_CTS; vht_prot[0] |= MT_PROT_CTRL_RTS_CTS; vht_prot[1] |= MT_PROT_CTRL_RTS_CTS; vht_prot[2] |= MT_PROT_CTRL_RTS_CTS; break; case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: prot[3] |= MT_PROT_CTRL_RTS_CTS; prot[5] |= MT_PROT_CTRL_RTS_CTS; vht_prot[1] |= MT_PROT_CTRL_RTS_CTS; vht_prot[2] |= MT_PROT_CTRL_RTS_CTS; break; } if (non_gf) { prot[4] |= MT_PROT_CTRL_RTS_CTS; prot[5] |= MT_PROT_CTRL_RTS_CTS; } for (i = 0; i < ARRAY_SIZE(prot); i++) mt76_wr(dev, MT_CCK_PROT_CFG + i * 4, prot[i]); for (i = 0; i < ARRAY_SIZE(vht_prot); i++) mt76_wr(dev, MT_TX_PROT_CFG6 + i * 4, vht_prot[i]); } void mt76x02_update_channel(struct mt76_phy *mphy) { struct mt76x02_dev *dev = container_of(mphy->dev, struct mt76x02_dev, mt76); struct mt76_channel_state *state; state = mphy->chan_state; state->cc_busy += mt76_rr(dev, MT_CH_BUSY); spin_lock_bh(&dev->mt76.cc_lock); state->cc_tx += dev->tx_airtime; dev->tx_airtime = 0; spin_unlock_bh(&dev->mt76.cc_lock); } EXPORT_SYMBOL_GPL(mt76x02_update_channel); static void mt76x02_check_mac_err(struct mt76x02_dev *dev) { if (dev->mt76.beacon_mask) { if (mt76_rr(dev, MT_TX_STA_0) & MT_TX_STA_0_BEACONS) { dev->beacon_hang_check = 0; return; } if (dev->beacon_hang_check < 10) return; } else { u32 val = mt76_rr(dev, 0x10f4); if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5)))) return; } dev_err(dev->mt76.dev, "MAC error detected\n"); mt76_wr(dev, MT_MAC_SYS_CTRL, 0); if (!mt76x02_wait_for_txrx_idle(&dev->mt76)) { dev_err(dev->mt76.dev, "MAC stop failed\n"); goto out; } dev->beacon_hang_check = 0; mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR); udelay(10); out: mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX | MT_MAC_SYS_CTRL_ENABLE_RX); } static void mt76x02_edcca_tx_enable(struct mt76x02_dev *dev, bool enable) { if (enable) { u32 data; mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX); mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN); /* enable pa-lna */ data = mt76_rr(dev, MT_TX_PIN_CFG); data |= MT_TX_PIN_CFG_TXANT | MT_TX_PIN_CFG_RXANT | MT_TX_PIN_RFTR_EN | MT_TX_PIN_TRSW_EN; mt76_wr(dev, MT_TX_PIN_CFG, data); } else { mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX); mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN); /* disable pa-lna */ mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT); mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_RXANT); } dev->ed_tx_blocked = !enable; } void mt76x02_edcca_init(struct mt76x02_dev *dev) { dev->ed_trigger = 0; dev->ed_silent = 0; if (dev->ed_monitor) { struct ieee80211_channel *chan = dev->mphy.chandef.chan; u8 ed_th = chan->band == NL80211_BAND_5GHZ ? 0x0e : 0x20; mt76_clear(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN); mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN); mt76_rmw(dev, MT_BBP(AGC, 2), GENMASK(15, 0), ed_th << 8 | ed_th); mt76_set(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN); } else { mt76_set(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN); mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN); if (is_mt76x2(dev)) { mt76_wr(dev, MT_BBP(AGC, 2), 0x00007070); mt76_set(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN); } else { mt76_wr(dev, MT_BBP(AGC, 2), 0x003a6464); mt76_clear(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN); } } mt76x02_edcca_tx_enable(dev, true); dev->ed_monitor_learning = true; /* clear previous CCA timer value */ mt76_rr(dev, MT_ED_CCA_TIMER); dev->ed_time = ktime_get_boottime(); } EXPORT_SYMBOL_GPL(mt76x02_edcca_init); #define MT_EDCCA_TH 92 #define MT_EDCCA_BLOCK_TH 2 #define MT_EDCCA_LEARN_TH 50 #define MT_EDCCA_LEARN_CCA 180 #define MT_EDCCA_LEARN_TIMEOUT (20 * HZ) static void mt76x02_edcca_check(struct mt76x02_dev *dev) { ktime_t cur_time; u32 active, val, busy; cur_time = ktime_get_boottime(); val = mt76_rr(dev, MT_ED_CCA_TIMER); active = ktime_to_us(ktime_sub(cur_time, dev->ed_time)); dev->ed_time = cur_time; busy = (val * 100) / active; busy = min_t(u32, busy, 100); if (busy > MT_EDCCA_TH) { dev->ed_trigger++; dev->ed_silent = 0; } else { dev->ed_silent++; dev->ed_trigger = 0; } if (dev->cal.agc_lowest_gain && dev->cal.false_cca > MT_EDCCA_LEARN_CCA && dev->ed_trigger > MT_EDCCA_LEARN_TH) { dev->ed_monitor_learning = false; dev->ed_trigger_timeout = jiffies + 20 * HZ; } else if (!dev->ed_monitor_learning && time_is_after_jiffies(dev->ed_trigger_timeout)) { dev->ed_monitor_learning = true; mt76x02_edcca_tx_enable(dev, true); } if (dev->ed_monitor_learning) return; if (dev->ed_trigger > MT_EDCCA_BLOCK_TH && !dev->ed_tx_blocked) mt76x02_edcca_tx_enable(dev, false); else if (dev->ed_silent > MT_EDCCA_BLOCK_TH && dev->ed_tx_blocked) mt76x02_edcca_tx_enable(dev, true); } void mt76x02_mac_work(struct work_struct *work) { struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev, mphy.mac_work.work); int i, idx; mutex_lock(&dev->mt76.mutex); mt76_update_survey(&dev->mphy); for (i = 0, idx = 0; i < 16; i++) { u32 val = mt76_rr(dev, MT_TX_AGG_CNT(i)); dev->mt76.aggr_stats[idx++] += val & 0xffff; dev->mt76.aggr_stats[idx++] += val >> 16; } mt76x02_check_mac_err(dev); if (dev->ed_monitor) mt76x02_edcca_check(dev); mutex_unlock(&dev->mt76.mutex); mt76_tx_status_check(&dev->mt76, false); ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work, MT_MAC_WORK_INTERVAL); } void mt76x02_mac_cc_reset(struct mt76x02_dev *dev) { dev->mphy.survey_time = ktime_get_boottime(); mt76_wr(dev, MT_CH_TIME_CFG, MT_CH_TIME_CFG_TIMER_EN | MT_CH_TIME_CFG_TX_AS_BUSY | MT_CH_TIME_CFG_RX_AS_BUSY | MT_CH_TIME_CFG_NAV_AS_BUSY | MT_CH_TIME_CFG_EIFS_AS_BUSY | MT_CH_CCA_RC_EN | FIELD_PREP(MT_CH_TIME_CFG_CH_TIMER_CLR, 1)); /* channel cycle counters read-and-clear */ mt76_rr(dev, MT_CH_BUSY); mt76_rr(dev, MT_CH_IDLE); } EXPORT_SYMBOL_GPL(mt76x02_mac_cc_reset); void mt76x02_mac_set_bssid(struct mt76x02_dev *dev, u8 idx, const u8 *addr) { idx &= 7; mt76_wr(dev, MT_MAC_APC_BSSID_L(idx), get_unaligned_le32(addr)); mt76_rmw_field(dev, MT_MAC_APC_BSSID_H(idx), MT_MAC_APC_BSSID_H_ADDR, get_unaligned_le16(addr + 4)); }