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- // 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 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 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 == 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(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 == MT_CIPHER_TKIP) {
- pn |= (iv >> 16) & 0xff;
- pn |= (iv & 0xff) << 8;
- } else if (cipher >= MT_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 == MT_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 >= MT_CIPHER_TKIP) {
- iv_data[3] |= 0x20;
- put_unaligned_le32(pn >> 16, &iv_data[4]);
- }
- if (cipher == MT_CIPHER_TKIP) {
- iv_data[0] = (pn >> 8) & 0xff;
- iv_data[1] = (iv_data[0] | 0x20) & 0x7f;
- iv_data[2] = pn & 0xff;
- } else if (cipher >= MT_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 __le16
- 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 cpu_to_le16(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);
- __le16 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;
- 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;
- txwi->rate = 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 {
- txwi->rate = mt76x02_mac_tx_rate_val(dev, rate, &nss);
- max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate);
- }
- 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->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->ht_cap.ampdu_density;
- 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);
- 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);
- signal = max_t(s8, signal, status->chain_signal[1]);
- }
- status->signal = signal;
- 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_dev *mdev)
- {
- struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
- struct mt76_channel_state *state;
- state = mdev->phy.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)
- {
- u32 val = mt76_rr(dev, 0x10f4);
- if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5))))
- return;
- dev_err(dev->mt76.dev, "mac specific condition occurred\n");
- mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
- udelay(10);
- 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->mt76);
- 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;
- }
- if (!dev->mt76.beacon_mask)
- mt76x02_check_mac_err(dev);
- if (dev->ed_monitor)
- mt76x02_edcca_check(dev);
- mutex_unlock(&dev->mt76.mutex);
- mt76_tx_status_check(&dev->mt76, NULL, 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));
- }
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