diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt76x2_mac_common.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x2_mac_common.c | 699 |
1 files changed, 699 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2_mac_common.c b/drivers/net/wireless/mediatek/mt76/mt76x2_mac_common.c new file mode 100644 index 0000000..6542644 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt76x2_mac_common.c @@ -0,0 +1,699 @@ +/* + * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> + * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "mt76x2.h" + +void mt76x2_mac_stop(struct mt76x2_dev *dev, bool force) +{ + bool stopped = false; + u32 rts_cfg; + int i; + + mt76_wr(dev, MT_MAC_SYS_CTRL, 0); + + rts_cfg = mt76_rr(dev, MT_TX_RTS_CFG); + mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg & ~MT_TX_RTS_CFG_RETRY_LIMIT); + + /* Wait for MAC to become idle */ + for (i = 0; i < 300; i++) { + if ((mt76_rr(dev, MT_MAC_STATUS) & + (MT_MAC_STATUS_RX | MT_MAC_STATUS_TX)) || + mt76_rr(dev, MT_BBP(IBI, 12))) { + udelay(1); + continue; + } + + stopped = true; + break; + } + + if (force && !stopped) { + mt76_set(dev, MT_BBP(CORE, 4), BIT(1)); + mt76_clear(dev, MT_BBP(CORE, 4), BIT(1)); + + mt76_set(dev, MT_BBP(CORE, 4), BIT(0)); + mt76_clear(dev, MT_BBP(CORE, 4), BIT(0)); + } + + mt76_wr(dev, MT_TX_RTS_CFG, rts_cfg); +} +EXPORT_SYMBOL_GPL(mt76x2_mac_stop); + +bool mt76x2_mac_load_tx_status(struct mt76x2_dev *dev, + struct mt76x2_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); + + return true; +} +EXPORT_SYMBOL_GPL(mt76x2_mac_load_tx_status); + +static int +mt76x2_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; + /* fall through */ + 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; +} + +static void +mt76x2_mac_fill_tx_status(struct mt76x2_dev *dev, + struct ieee80211_tx_info *info, + struct mt76x2_tx_status *st, int n_frames) +{ + struct ieee80211_tx_rate *rate = info->status.rates; + int cur_idx, last_rate; + int i; + + if (!n_frames) + return; + + last_rate = min_t(int, st->retry, IEEE80211_TX_MAX_RATES - 1); + mt76x2_mac_process_tx_rate(&rate[last_rate], st->rate, + dev->mt76.chandef.chan->band); + if (last_rate < IEEE80211_TX_MAX_RATES - 1) + rate[last_rate + 1].idx = -1; + + cur_idx = rate[last_rate].idx + last_rate; + for (i = 0; i <= last_rate; i++) { + rate[i].flags = rate[last_rate].flags; + rate[i].idx = max_t(int, 0, cur_idx - i); + rate[i].count = 1; + } + rate[last_rate].count = st->retry + 1 - last_rate; + + info->status.ampdu_len = n_frames; + info->status.ampdu_ack_len = st->success ? n_frames : 0; + + if (st->pktid & MT_TXWI_PKTID_PROBE) + info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE; + + 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 mt76x2_send_tx_status(struct mt76x2_dev *dev, + struct mt76x2_tx_status *stat, u8 *update) +{ + struct ieee80211_tx_info info = {}; + struct ieee80211_sta *sta = NULL; + struct mt76_wcid *wcid = NULL; + struct mt76x2_sta *msta = NULL; + + rcu_read_lock(); + if (stat->wcid < ARRAY_SIZE(dev->wcid)) + wcid = rcu_dereference(dev->wcid[stat->wcid]); + + if (wcid) { + void *priv; + + priv = msta = container_of(wcid, struct mt76x2_sta, wcid); + sta = container_of(priv, struct ieee80211_sta, + drv_priv); + } + + if (msta && stat->aggr) { + 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++; + goto out; + } + + mt76x2_mac_fill_tx_status(dev, &info, &msta->status, + msta->n_frames); + + msta->status = *stat; + msta->n_frames = 1; + *update = 0; + } else { + mt76x2_mac_fill_tx_status(dev, &info, stat, 1); + *update = 1; + } + + ieee80211_tx_status_noskb(mt76_hw(dev), sta, &info); + +out: + rcu_read_unlock(); +} +EXPORT_SYMBOL_GPL(mt76x2_send_tx_status); + +static enum mt76x2_cipher_type +mt76x2_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data) +{ + memset(key_data, 0, 32); + if (!key) + return MT_CIPHER_NONE; + + if (key->keylen > 32) + return MT_CIPHER_NONE; + + memcpy(key_data, key->key, key->keylen); + + switch (key->cipher) { + case WLAN_CIPHER_SUITE_WEP40: + return MT_CIPHER_WEP40; + case WLAN_CIPHER_SUITE_WEP104: + return MT_CIPHER_WEP104; + case WLAN_CIPHER_SUITE_TKIP: + return MT_CIPHER_TKIP; + case WLAN_CIPHER_SUITE_CCMP: + return MT_CIPHER_AES_CCMP; + default: + return MT_CIPHER_NONE; + } +} + +int mt76x2_mac_shared_key_setup(struct mt76x2_dev *dev, u8 vif_idx, u8 key_idx, + struct ieee80211_key_conf *key) +{ + enum mt76x2_cipher_type cipher; + u8 key_data[32]; + u32 val; + + cipher = mt76x2_mac_get_key_info(key, key_data); + if (cipher == MT_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(mt76x2_mac_shared_key_setup); + +int mt76x2_mac_wcid_set_key(struct mt76x2_dev *dev, u8 idx, + struct ieee80211_key_conf *key) +{ + enum mt76x2_cipher_type cipher; + u8 key_data[32]; + u8 iv_data[8]; + + cipher = mt76x2_mac_get_key_info(key, key_data); + if (cipher == MT_CIPHER_NONE && key) + return -EOPNOTSUPP; + + mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PKEY_MODE, cipher); + mt76_wr_copy(dev, MT_WCID_KEY(idx), key_data, sizeof(key_data)); + + 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)); + iv_data[3] = key->keyidx << 6; + if (cipher >= MT_CIPHER_TKIP) + iv_data[3] |= 0x20; + } + + mt76_wr_copy(dev, MT_WCID_IV(idx), iv_data, sizeof(iv_data)); + + return 0; +} +EXPORT_SYMBOL_GPL(mt76x2_mac_wcid_set_key); + +static __le16 +mt76x2_mac_tx_rate_val(struct mt76x2_dev *dev, + const struct ieee80211_tx_rate *rate, u8 *nss_val) +{ + u16 rateval; + u8 phy, rate_idx; + u8 nss = 1; + u8 bw = 0; + + 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->mt76.chandef.chan->band; + u16 val; + + r = &mt76_hw(dev)->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; + bw = 0; + } + + 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 cpu_to_le16(rateval); +} + +void mt76x2_mac_wcid_set_rate(struct mt76x2_dev *dev, struct mt76_wcid *wcid, + const struct ieee80211_tx_rate *rate) +{ + spin_lock_bh(&dev->mt76.lock); + wcid->tx_rate = mt76x2_mac_tx_rate_val(dev, rate, &wcid->tx_rate_nss); + wcid->tx_rate_set = true; + spin_unlock_bh(&dev->mt76.lock); +} +EXPORT_SYMBOL_GPL(mt76x2_mac_wcid_set_rate); + +void mt76x2_mac_write_txwi(struct mt76x2_dev *dev, struct mt76x2_txwi *txwi, + struct sk_buff *skb, struct mt76_wcid *wcid, + struct ieee80211_sta *sta, int len) +{ + 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; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + u16 rate_ht_mask = FIELD_PREP(MT_RXWI_RATE_PHY, BIT(1) | BIT(2)); + u16 txwi_flags = 0; + u8 nss; + s8 txpwr_adj, max_txpwr_adj; + u8 ccmp_pn[8]; + + memset(txwi, 0, sizeof(*txwi)); + + if (wcid) + txwi->wcid = wcid->idx; + else + txwi->wcid = 0xff; + + txwi->pktid = 1; + + 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[1]); + } + + spin_lock_bh(&dev->mt76.lock); + if (wcid && (rate->idx < 0 || !rate->count)) { + txwi->rate = wcid->tx_rate; + max_txpwr_adj = wcid->max_txpwr_adj; + nss = wcid->tx_rate_nss; + } else { + txwi->rate = mt76x2_mac_tx_rate_val(dev, rate, &nss); + max_txpwr_adj = mt76x2_tx_get_max_txpwr_adj(dev, rate); + } + spin_unlock_bh(&dev->mt76.lock); + + txpwr_adj = mt76x2_tx_get_txpwr_adj(dev, dev->txpower_conf, + max_txpwr_adj); + txwi->ctl2 = FIELD_PREP(MT_TX_PWR_ADJ, txpwr_adj); + + if (mt76xx_rev(dev) >= MT76XX_REV_E4) + txwi->txstream = 0x13; + else if (mt76xx_rev(dev) >= MT76XX_REV_E3 && + !(txwi->rate & cpu_to_le16(rate_ht_mask))) + txwi->txstream = 0x93; + + if (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->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_RATE_CTRL_PROBE) + txwi->pktid |= MT_TXWI_PKTID_PROBE; + if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) { + u8 ba_size = IEEE80211_MIN_AMPDU_BUF; + + ba_size <<= sta->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); + + txwi_flags |= MT_TXWI_FLAGS_AMPDU | + FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY, + sta->ht_cap.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(mt76x2_mac_write_txwi); + +void mt76x2_mac_wcid_set_drop(struct mt76x2_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)); +} +EXPORT_SYMBOL_GPL(mt76x2_mac_wcid_set_drop); + +void mt76x2_mac_wcid_setup(struct mt76x2_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); + + mt76_wr(dev, MT_WCID_TX_RATE(idx), 0); + mt76_wr(dev, MT_WCID_TX_RATE(idx) + 4, 0); + + 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(mt76x2_mac_wcid_setup); + +static int +mt76x2_mac_process_rate(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; + /* fall through */ + case MT_PHY_TYPE_HT: + status->encoding = RX_ENC_HT; + status->rate_idx = idx; + break; + case MT_PHY_TYPE_VHT: + status->encoding = RX_ENC_VHT; + status->rate_idx = FIELD_GET(MT_RATE_INDEX_VHT_IDX, idx); + status->nss = 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; +} + +static void mt76x2_remove_hdr_pad(struct sk_buff *skb, int len) +{ + int hdrlen; + + if (!len) + return; + + hdrlen = ieee80211_get_hdrlen_from_skb(skb); + memmove(skb->data + len, skb->data, hdrlen); + skb_pull(skb, len); +} + +int mt76x2_mac_get_rssi(struct mt76x2_dev *dev, s8 rssi, int chain) +{ + struct mt76x2_rx_freq_cal *cal = &dev->cal.rx; + + rssi += cal->rssi_offset[chain]; + rssi -= cal->lna_gain; + + return rssi; +} + +static struct mt76x2_sta * +mt76x2_rx_get_sta(struct mt76x2_dev *dev, u8 idx) +{ + struct mt76_wcid *wcid; + + if (idx >= ARRAY_SIZE(dev->wcid)) + return NULL; + + wcid = rcu_dereference(dev->wcid[idx]); + if (!wcid) + return NULL; + + return container_of(wcid, struct mt76x2_sta, wcid); +} + +static struct mt76_wcid * +mt76x2_rx_get_sta_wcid(struct mt76x2_dev *dev, struct mt76x2_sta *sta, + bool unicast) +{ + if (!sta) + return NULL; + + if (unicast) + return &sta->wcid; + else + return &sta->vif->group_wcid; +} + +int mt76x2_mac_process_rx(struct mt76x2_dev *dev, struct sk_buff *skb, + void *rxi) +{ + struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb; + struct mt76x2_rxwi *rxwi = rxi; + struct mt76x2_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; + u8 pn_len; + u8 wcid; + int len; + + if (!test_bit(MT76_STATE_RUNNING, &dev->mt76.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 = mt76x2_rx_get_sta(dev, wcid); + status->wcid = mt76x2_rx_get_sta_wcid(dev, 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; + } + } + + mt76x2_remove_hdr_pad(skb, pad_len); + + if ((rxinfo & MT_RXINFO_BA) && !(rxinfo & MT_RXINFO_NULL)) + status->aggr = true; + + if (WARN_ON_ONCE(len > skb->len)) + return -EINVAL; + + pskb_trim(skb, len); + status->chains = BIT(0) | BIT(1); + status->chain_signal[0] = mt76x2_mac_get_rssi(dev, rxwi->rssi[0], 0); + status->chain_signal[1] = mt76x2_mac_get_rssi(dev, rxwi->rssi[1], 1); + status->signal = max(status->chain_signal[0], status->chain_signal[1]); + status->freq = dev->mt76.chandef.chan->center_freq; + status->band = dev->mt76.chandef.chan->band; + + status->tid = FIELD_GET(MT_RXWI_TID, tid_sn); + status->seqno = FIELD_GET(MT_RXWI_SN, tid_sn); + + if (sta) { + ewma_signal_add(&sta->rssi, status->signal); + sta->inactive_count = 0; + } + + return mt76x2_mac_process_rate(status, rate); +} +EXPORT_SYMBOL_GPL(mt76x2_mac_process_rx); |