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linux/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c
Yuanjun Gong 3bb014c72b wifi: mt76: mt76x02: fix return value check in mt76x02_mac_process_rx 
in mt76x02_mac_process_rx(), return an error code if an
unexpected result is returned by pskb_trim.

Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2023-07-31 10:56:17 +02:00

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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->mphy.aggr_stats, 0, sizeof(dev->mphy.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) {
spin_lock_bh(&dev->mt76.rx_lock);
ieee80211_tx_status_ext(mt76_hw(dev), &status);
spin_unlock_bh(&dev->mt76.rx_lock);
}
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;
if (pskb_trim(skb, len))
return -EINVAL;
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->mphy.aggr_stats[idx++] += val & 0xffff;
dev->mphy.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));
}
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