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linuxdebug/drivers/net/wireless/mediatek/mt76/mt7921/mac.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: ISC
/* Copyright (C) 2020 MediaTek Inc. */
#include <linux/devcoredump.h>
#include <linux/etherdevice.h>
#include <linux/timekeeping.h>
#include "mt7921.h"
#include "../dma.h"
#include "mac.h"
#include "mcu.h"
static struct mt76_wcid *mt7921_rx_get_wcid(struct mt7921_dev *dev,
u16 idx, bool unicast)
{
struct mt7921_sta *sta;
struct mt76_wcid *wcid;
if (idx >= ARRAY_SIZE(dev->mt76.wcid))
return NULL;
wcid = rcu_dereference(dev->mt76.wcid[idx]);
if (unicast || !wcid)
return wcid;
if (!wcid->sta)
return NULL;
sta = container_of(wcid, struct mt7921_sta, wcid);
if (!sta->vif)
return NULL;
return &sta->vif->sta.wcid;
}
void mt7921_sta_ps(struct mt76_dev *mdev, struct ieee80211_sta *sta, bool ps)
{
}
EXPORT_SYMBOL_GPL(mt7921_sta_ps);
bool mt7921_mac_wtbl_update(struct mt7921_dev *dev, int idx, u32 mask)
{
mt76_rmw(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_WLAN_IDX,
FIELD_PREP(MT_WTBL_UPDATE_WLAN_IDX, idx) | mask);
return mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY,
0, 5000);
}
void mt7921_mac_sta_poll(struct mt7921_dev *dev)
{
static const u8 ac_to_tid[] = {
[IEEE80211_AC_BE] = 0,
[IEEE80211_AC_BK] = 1,
[IEEE80211_AC_VI] = 4,
[IEEE80211_AC_VO] = 6
};
struct ieee80211_sta *sta;
struct mt7921_sta *msta;
u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
LIST_HEAD(sta_poll_list);
struct rate_info *rate;
int i;
spin_lock_bh(&dev->sta_poll_lock);
list_splice_init(&dev->sta_poll_list, &sta_poll_list);
spin_unlock_bh(&dev->sta_poll_lock);
while (true) {
bool clear = false;
u32 addr, val;
u16 idx;
u8 bw;
spin_lock_bh(&dev->sta_poll_lock);
if (list_empty(&sta_poll_list)) {
spin_unlock_bh(&dev->sta_poll_lock);
break;
}
msta = list_first_entry(&sta_poll_list,
struct mt7921_sta, poll_list);
list_del_init(&msta->poll_list);
spin_unlock_bh(&dev->sta_poll_lock);
idx = msta->wcid.idx;
addr = mt7921_mac_wtbl_lmac_addr(idx, MT_WTBL_AC0_CTT_OFFSET);
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
u32 tx_last = msta->airtime_ac[i];
u32 rx_last = msta->airtime_ac[i + 4];
msta->airtime_ac[i] = mt76_rr(dev, addr);
msta->airtime_ac[i + 4] = mt76_rr(dev, addr + 4);
tx_time[i] = msta->airtime_ac[i] - tx_last;
rx_time[i] = msta->airtime_ac[i + 4] - rx_last;
if ((tx_last | rx_last) & BIT(30))
clear = true;
addr += 8;
}
if (clear) {
mt7921_mac_wtbl_update(dev, idx,
MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
memset(msta->airtime_ac, 0, sizeof(msta->airtime_ac));
}
if (!msta->wcid.sta)
continue;
sta = container_of((void *)msta, struct ieee80211_sta,
drv_priv);
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
u8 q = mt76_connac_lmac_mapping(i);
u32 tx_cur = tx_time[q];
u32 rx_cur = rx_time[q];
u8 tid = ac_to_tid[i];
if (!tx_cur && !rx_cur)
continue;
ieee80211_sta_register_airtime(sta, tid, tx_cur,
rx_cur);
}
/* We don't support reading GI info from txs packets.
* For accurate tx status reporting and AQL improvement,
* we need to make sure that flags match so polling GI
* from per-sta counters directly.
*/
rate = &msta->wcid.rate;
addr = mt7921_mac_wtbl_lmac_addr(idx,
MT_WTBL_TXRX_CAP_RATE_OFFSET);
val = mt76_rr(dev, addr);
switch (rate->bw) {
case RATE_INFO_BW_160:
bw = IEEE80211_STA_RX_BW_160;
break;
case RATE_INFO_BW_80:
bw = IEEE80211_STA_RX_BW_80;
break;
case RATE_INFO_BW_40:
bw = IEEE80211_STA_RX_BW_40;
break;
default:
bw = IEEE80211_STA_RX_BW_20;
break;
}
if (rate->flags & RATE_INFO_FLAGS_HE_MCS) {
u8 offs = MT_WTBL_TXRX_RATE_G2_HE + 2 * bw;
rate->he_gi = (val & (0x3 << offs)) >> offs;
} else if (rate->flags &
(RATE_INFO_FLAGS_VHT_MCS | RATE_INFO_FLAGS_MCS)) {
if (val & BIT(MT_WTBL_TXRX_RATE_G2 + bw))
rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
else
rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
}
}
}
EXPORT_SYMBOL_GPL(mt7921_mac_sta_poll);
static void
mt7921_get_status_freq_info(struct mt7921_dev *dev, struct mt76_phy *mphy,
struct mt76_rx_status *status, u8 chfreq)
{
if (!test_bit(MT76_HW_SCANNING, &mphy->state) &&
!test_bit(MT76_HW_SCHED_SCANNING, &mphy->state) &&
!test_bit(MT76_STATE_ROC, &mphy->state)) {
status->freq = mphy->chandef.chan->center_freq;
status->band = mphy->chandef.chan->band;
return;
}
if (chfreq > 180) {
status->band = NL80211_BAND_6GHZ;
chfreq = (chfreq - 181) * 4 + 1;
} else if (chfreq > 14) {
status->band = NL80211_BAND_5GHZ;
} else {
status->band = NL80211_BAND_2GHZ;
}
status->freq = ieee80211_channel_to_frequency(chfreq, status->band);
}
static void
mt7921_mac_rssi_iter(void *priv, u8 *mac, struct ieee80211_vif *vif)
{
struct sk_buff *skb = priv;
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
struct ieee80211_hdr *hdr = mt76_skb_get_hdr(skb);
if (status->signal > 0)
return;
if (!ether_addr_equal(vif->addr, hdr->addr1))
return;
ewma_rssi_add(&mvif->rssi, -status->signal);
}
static void
mt7921_mac_assoc_rssi(struct mt7921_dev *dev, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = mt76_skb_get_hdr(skb);
if (!ieee80211_is_assoc_resp(hdr->frame_control) &&
!ieee80211_is_auth(hdr->frame_control))
return;
ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7921_mac_rssi_iter, skb);
}
static int
mt7921_mac_fill_rx(struct mt7921_dev *dev, struct sk_buff *skb)
{
u32 csum_mask = MT_RXD0_NORMAL_IP_SUM | MT_RXD0_NORMAL_UDP_TCP_SUM;
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
bool hdr_trans, unicast, insert_ccmp_hdr = false;
u8 chfreq, qos_ctl = 0, remove_pad, amsdu_info;
u16 hdr_gap;
__le32 *rxv = NULL, *rxd = (__le32 *)skb->data;
struct mt76_phy *mphy = &dev->mt76.phy;
struct mt7921_phy *phy = &dev->phy;
struct ieee80211_supported_band *sband;
u32 csum_status = *(u32 *)skb->cb;
u32 rxd0 = le32_to_cpu(rxd[0]);
u32 rxd1 = le32_to_cpu(rxd[1]);
u32 rxd2 = le32_to_cpu(rxd[2]);
u32 rxd3 = le32_to_cpu(rxd[3]);
u32 rxd4 = le32_to_cpu(rxd[4]);
struct mt7921_sta *msta = NULL;
u16 seq_ctrl = 0;
__le16 fc = 0;
u8 mode = 0;
int i, idx;
memset(status, 0, sizeof(*status));
if (rxd1 & MT_RXD1_NORMAL_BAND_IDX)
return -EINVAL;
if (!test_bit(MT76_STATE_RUNNING, &mphy->state))
return -EINVAL;
if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR)
return -EINVAL;
hdr_trans = rxd2 & MT_RXD2_NORMAL_HDR_TRANS;
if (hdr_trans && (rxd1 & MT_RXD1_NORMAL_CM))
return -EINVAL;
/* ICV error or CCMP/BIP/WPI MIC error */
if (rxd1 & MT_RXD1_NORMAL_ICV_ERR)
status->flag |= RX_FLAG_ONLY_MONITOR;
chfreq = FIELD_GET(MT_RXD3_NORMAL_CH_FREQ, rxd3);
unicast = FIELD_GET(MT_RXD3_NORMAL_ADDR_TYPE, rxd3) == MT_RXD3_NORMAL_U2M;
idx = FIELD_GET(MT_RXD1_NORMAL_WLAN_IDX, rxd1);
status->wcid = mt7921_rx_get_wcid(dev, idx, unicast);
if (status->wcid) {
msta = container_of(status->wcid, struct mt7921_sta, wcid);
spin_lock_bh(&dev->sta_poll_lock);
if (list_empty(&msta->poll_list))
list_add_tail(&msta->poll_list, &dev->sta_poll_list);
spin_unlock_bh(&dev->sta_poll_lock);
}
mt7921_get_status_freq_info(dev, mphy, status, chfreq);
switch (status->band) {
case NL80211_BAND_5GHZ:
sband = &mphy->sband_5g.sband;
break;
case NL80211_BAND_6GHZ:
sband = &mphy->sband_6g.sband;
break;
default:
sband = &mphy->sband_2g.sband;
break;
}
if (!sband->channels)
return -EINVAL;
if (mt76_is_mmio(&dev->mt76) && (rxd0 & csum_mask) == csum_mask &&
!(csum_status & (BIT(0) | BIT(2) | BIT(3))))
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (rxd1 & MT_RXD1_NORMAL_FCS_ERR)
status->flag |= RX_FLAG_FAILED_FCS_CRC;
if (rxd1 & MT_RXD1_NORMAL_TKIP_MIC_ERR)
status->flag |= RX_FLAG_MMIC_ERROR;
if (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1) != 0 &&
!(rxd1 & (MT_RXD1_NORMAL_CLM | MT_RXD1_NORMAL_CM))) {
status->flag |= RX_FLAG_DECRYPTED;
status->flag |= RX_FLAG_IV_STRIPPED;
status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
}
remove_pad = FIELD_GET(MT_RXD2_NORMAL_HDR_OFFSET, rxd2);
if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
return -EINVAL;
rxd += 6;
if (rxd1 & MT_RXD1_NORMAL_GROUP_4) {
u32 v0 = le32_to_cpu(rxd[0]);
u32 v2 = le32_to_cpu(rxd[2]);
fc = cpu_to_le16(FIELD_GET(MT_RXD6_FRAME_CONTROL, v0));
seq_ctrl = FIELD_GET(MT_RXD8_SEQ_CTRL, v2);
qos_ctl = FIELD_GET(MT_RXD8_QOS_CTL, v2);
rxd += 4;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
}
if (rxd1 & MT_RXD1_NORMAL_GROUP_1) {
u8 *data = (u8 *)rxd;
if (status->flag & RX_FLAG_DECRYPTED) {
switch (FIELD_GET(MT_RXD1_NORMAL_SEC_MODE, rxd1)) {
case MT_CIPHER_AES_CCMP:
case MT_CIPHER_CCMP_CCX:
case MT_CIPHER_CCMP_256:
insert_ccmp_hdr =
FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
fallthrough;
case MT_CIPHER_TKIP:
case MT_CIPHER_TKIP_NO_MIC:
case MT_CIPHER_GCMP:
case MT_CIPHER_GCMP_256:
status->iv[0] = data[5];
status->iv[1] = data[4];
status->iv[2] = data[3];
status->iv[3] = data[2];
status->iv[4] = data[1];
status->iv[5] = data[0];
break;
default:
break;
}
}
rxd += 4;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
}
if (rxd1 & MT_RXD1_NORMAL_GROUP_2) {
status->timestamp = le32_to_cpu(rxd[0]);
status->flag |= RX_FLAG_MACTIME_START;
if (!(rxd2 & MT_RXD2_NORMAL_NON_AMPDU)) {
status->flag |= RX_FLAG_AMPDU_DETAILS;
/* all subframes of an A-MPDU have the same timestamp */
if (phy->rx_ampdu_ts != status->timestamp) {
if (!++phy->ampdu_ref)
phy->ampdu_ref++;
}
phy->rx_ampdu_ts = status->timestamp;
status->ampdu_ref = phy->ampdu_ref;
}
rxd += 2;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
}
/* RXD Group 3 - P-RXV */
if (rxd1 & MT_RXD1_NORMAL_GROUP_3) {
u32 v0, v1;
int ret;
rxv = rxd;
rxd += 2;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
v0 = le32_to_cpu(rxv[0]);
v1 = le32_to_cpu(rxv[1]);
if (v0 & MT_PRXV_HT_AD_CODE)
status->enc_flags |= RX_ENC_FLAG_LDPC;
ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband,
rxv, &mode);
if (ret < 0)
return ret;
if (rxd1 & MT_RXD1_NORMAL_GROUP_5) {
rxd += 6;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
rxv = rxd;
/* Monitor mode would use RCPI described in GROUP 5
* instead.
*/
v1 = le32_to_cpu(rxv[0]);
rxd += 12;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
}
status->chains = mphy->antenna_mask;
status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1);
status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1);
status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1);
status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1);
status->signal = -128;
for (i = 0; i < hweight8(mphy->antenna_mask); i++) {
if (!(status->chains & BIT(i)) ||
status->chain_signal[i] >= 0)
continue;
status->signal = max(status->signal,
status->chain_signal[i]);
}
}
amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4);
status->amsdu = !!amsdu_info;
if (status->amsdu) {
status->first_amsdu = amsdu_info == MT_RXD4_FIRST_AMSDU_FRAME;
status->last_amsdu = amsdu_info == MT_RXD4_LAST_AMSDU_FRAME;
}
hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad;
if (hdr_trans && ieee80211_has_morefrags(fc)) {
struct ieee80211_vif *vif;
int err;
if (!msta || !msta->vif)
return -EINVAL;
vif = container_of((void *)msta->vif, struct ieee80211_vif,
drv_priv);
err = mt76_connac2_reverse_frag0_hdr_trans(vif, skb, hdr_gap);
if (err)
return err;
hdr_trans = false;
} else {
skb_pull(skb, hdr_gap);
if (!hdr_trans && status->amsdu) {
memmove(skb->data + 2, skb->data,
ieee80211_get_hdrlen_from_skb(skb));
skb_pull(skb, 2);
}
}
if (!hdr_trans) {
struct ieee80211_hdr *hdr;
if (insert_ccmp_hdr) {
u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
mt76_insert_ccmp_hdr(skb, key_id);
}
hdr = mt76_skb_get_hdr(skb);
fc = hdr->frame_control;
if (ieee80211_is_data_qos(fc)) {
seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
qos_ctl = *ieee80211_get_qos_ctl(hdr);
}
} else {
status->flag |= RX_FLAG_8023;
}
mt7921_mac_assoc_rssi(dev, skb);
if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
mt76_connac2_mac_decode_he_radiotap(&dev->mt76, skb, rxv, mode);
if (!status->wcid || !ieee80211_is_data_qos(fc))
return 0;
status->aggr = unicast && !ieee80211_is_qos_nullfunc(fc);
status->seqno = IEEE80211_SEQ_TO_SN(seq_ctrl);
status->qos_ctl = qos_ctl;
return 0;
}
static void mt7921_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi)
{
struct mt7921_sta *msta;
u16 fc, tid;
u32 val;
if (!sta || !(sta->deflink.ht_cap.ht_supported || sta->deflink.he_cap.has_he))
return;
tid = le32_get_bits(txwi[1], MT_TXD1_TID);
if (tid >= 6) /* skip VO queue */
return;
val = le32_to_cpu(txwi[2]);
fc = FIELD_GET(MT_TXD2_FRAME_TYPE, val) << 2 |
FIELD_GET(MT_TXD2_SUB_TYPE, val) << 4;
if (unlikely(fc != (IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA)))
return;
msta = (struct mt7921_sta *)sta->drv_priv;
if (!test_and_set_bit(tid, &msta->ampdu_state))
ieee80211_start_tx_ba_session(sta, tid, 0);
}
void mt7921_mac_add_txs(struct mt7921_dev *dev, void *data)
{
struct mt7921_sta *msta = NULL;
struct mt76_wcid *wcid;
__le32 *txs_data = data;
u16 wcidx;
u8 pid;
if (le32_get_bits(txs_data[0], MT_TXS0_TXS_FORMAT) > 1)
return;
wcidx = le32_get_bits(txs_data[2], MT_TXS2_WCID);
pid = le32_get_bits(txs_data[3], MT_TXS3_PID);
if (pid < MT_PACKET_ID_FIRST)
return;
if (wcidx >= MT7921_WTBL_SIZE)
return;
rcu_read_lock();
wcid = rcu_dereference(dev->mt76.wcid[wcidx]);
if (!wcid)
goto out;
msta = container_of(wcid, struct mt7921_sta, wcid);
mt76_connac2_mac_add_txs_skb(&dev->mt76, wcid, pid, txs_data);
if (!wcid->sta)
goto out;
spin_lock_bh(&dev->sta_poll_lock);
if (list_empty(&msta->poll_list))
list_add_tail(&msta->poll_list, &dev->sta_poll_list);
spin_unlock_bh(&dev->sta_poll_lock);
out:
rcu_read_unlock();
}
void mt7921_txwi_free(struct mt7921_dev *dev, struct mt76_txwi_cache *t,
struct ieee80211_sta *sta, bool clear_status,
struct list_head *free_list)
{
struct mt76_dev *mdev = &dev->mt76;
__le32 *txwi;
u16 wcid_idx;
mt76_connac_txp_skb_unmap(mdev, t);
if (!t->skb)
goto out;
txwi = (__le32 *)mt76_get_txwi_ptr(mdev, t);
if (sta) {
struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
if (likely(t->skb->protocol != cpu_to_be16(ETH_P_PAE)))
mt7921_tx_check_aggr(sta, txwi);
wcid_idx = wcid->idx;
} else {
wcid_idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
}
__mt76_tx_complete_skb(mdev, wcid_idx, t->skb, free_list);
out:
t->skb = NULL;
mt76_put_txwi(mdev, t);
}
EXPORT_SYMBOL_GPL(mt7921_txwi_free);
static void mt7921_mac_tx_free(struct mt7921_dev *dev, void *data, int len)
{
struct mt76_connac_tx_free *free = data;
__le32 *tx_info = (__le32 *)(data + sizeof(*free));
struct mt76_dev *mdev = &dev->mt76;
struct mt76_txwi_cache *txwi;
struct ieee80211_sta *sta = NULL;
struct sk_buff *skb, *tmp;
void *end = data + len;
LIST_HEAD(free_list);
bool wake = false;
u8 i, count;
/* clean DMA queues and unmap buffers first */
mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_PSD], false);
mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[MT_TXQ_BE], false);
count = le16_get_bits(free->ctrl, MT_TX_FREE_MSDU_CNT);
if (WARN_ON_ONCE((void *)&tx_info[count] > end))
return;
for (i = 0; i < count; i++) {
u32 msdu, info = le32_to_cpu(tx_info[i]);
u8 stat;
/* 1'b1: new wcid pair.
* 1'b0: msdu_id with the same 'wcid pair' as above.
*/
if (info & MT_TX_FREE_PAIR) {
struct mt7921_sta *msta;
struct mt76_wcid *wcid;
u16 idx;
count++;
idx = FIELD_GET(MT_TX_FREE_WLAN_ID, info);
wcid = rcu_dereference(dev->mt76.wcid[idx]);
sta = wcid_to_sta(wcid);
if (!sta)
continue;
msta = container_of(wcid, struct mt7921_sta, wcid);
spin_lock_bh(&dev->sta_poll_lock);
if (list_empty(&msta->poll_list))
list_add_tail(&msta->poll_list, &dev->sta_poll_list);
spin_unlock_bh(&dev->sta_poll_lock);
continue;
}
msdu = FIELD_GET(MT_TX_FREE_MSDU_ID, info);
stat = FIELD_GET(MT_TX_FREE_STATUS, info);
txwi = mt76_token_release(mdev, msdu, &wake);
if (!txwi)
continue;
mt7921_txwi_free(dev, txwi, sta, stat, &free_list);
}
if (wake)
mt76_set_tx_blocked(&dev->mt76, false);
list_for_each_entry_safe(skb, tmp, &free_list, list) {
skb_list_del_init(skb);
napi_consume_skb(skb, 1);
}
rcu_read_lock();
mt7921_mac_sta_poll(dev);
rcu_read_unlock();
mt76_worker_schedule(&dev->mt76.tx_worker);
}
bool mt7921_rx_check(struct mt76_dev *mdev, void *data, int len)
{
struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
__le32 *rxd = (__le32 *)data;
__le32 *end = (__le32 *)&rxd[len / 4];
enum rx_pkt_type type;
type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
switch (type) {
case PKT_TYPE_TXRX_NOTIFY:
/* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
mt7921_mac_tx_free(dev, data, len); /* mmio */
return false;
case PKT_TYPE_TXS:
for (rxd += 2; rxd + 8 <= end; rxd += 8)
mt7921_mac_add_txs(dev, rxd);
return false;
default:
return true;
}
}
EXPORT_SYMBOL_GPL(mt7921_rx_check);
void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
struct sk_buff *skb)
{
struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
__le32 *rxd = (__le32 *)skb->data;
__le32 *end = (__le32 *)&skb->data[skb->len];
enum rx_pkt_type type;
u16 flag;
type = le32_get_bits(rxd[0], MT_RXD0_PKT_TYPE);
flag = le32_get_bits(rxd[0], MT_RXD0_PKT_FLAG);
if (type == PKT_TYPE_RX_EVENT && flag == 0x1)
type = PKT_TYPE_NORMAL_MCU;
switch (type) {
case PKT_TYPE_TXRX_NOTIFY:
/* PKT_TYPE_TXRX_NOTIFY can be received only by mmio devices */
mt7921_mac_tx_free(dev, skb->data, skb->len);
napi_consume_skb(skb, 1);
break;
case PKT_TYPE_RX_EVENT:
mt7921_mcu_rx_event(dev, skb);
break;
case PKT_TYPE_TXS:
for (rxd += 2; rxd + 8 <= end; rxd += 8)
mt7921_mac_add_txs(dev, rxd);
dev_kfree_skb(skb);
break;
case PKT_TYPE_NORMAL_MCU:
case PKT_TYPE_NORMAL:
if (!mt7921_mac_fill_rx(dev, skb)) {
mt76_rx(&dev->mt76, q, skb);
return;
}
fallthrough;
default:
dev_kfree_skb(skb);
break;
}
}
EXPORT_SYMBOL_GPL(mt7921_queue_rx_skb);
void mt7921_mac_reset_counters(struct mt7921_phy *phy)
{
struct mt7921_dev *dev = phy->dev;
int i;
for (i = 0; i < 4; i++) {
mt76_rr(dev, MT_TX_AGG_CNT(0, i));
mt76_rr(dev, MT_TX_AGG_CNT2(0, i));
}
dev->mt76.phy.survey_time = ktime_get_boottime();
memset(&dev->mt76.aggr_stats[0], 0, sizeof(dev->mt76.aggr_stats) / 2);
/* reset airtime counters */
mt76_rr(dev, MT_MIB_SDR9(0));
mt76_rr(dev, MT_MIB_SDR36(0));
mt76_rr(dev, MT_MIB_SDR37(0));
mt76_set(dev, MT_WF_RMAC_MIB_TIME0(0), MT_WF_RMAC_MIB_RXTIME_CLR);
mt76_set(dev, MT_WF_RMAC_MIB_AIRTIME0(0), MT_WF_RMAC_MIB_RXTIME_CLR);
}
void mt7921_mac_set_timing(struct mt7921_phy *phy)
{
s16 coverage_class = phy->coverage_class;
struct mt7921_dev *dev = phy->dev;
u32 val, reg_offset;
u32 cck = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, 231) |
FIELD_PREP(MT_TIMEOUT_VAL_CCA, 48);
u32 ofdm = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, 60) |
FIELD_PREP(MT_TIMEOUT_VAL_CCA, 28);
bool is_2ghz = phy->mt76->chandef.chan->band == NL80211_BAND_2GHZ;
int sifs = is_2ghz ? 10 : 16, offset;
if (!test_bit(MT76_STATE_RUNNING, &phy->mt76->state))
return;
mt76_set(dev, MT_ARB_SCR(0),
MT_ARB_SCR_TX_DISABLE | MT_ARB_SCR_RX_DISABLE);
udelay(1);
offset = 3 * coverage_class;
reg_offset = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, offset) |
FIELD_PREP(MT_TIMEOUT_VAL_CCA, offset);
mt76_wr(dev, MT_TMAC_CDTR(0), cck + reg_offset);
mt76_wr(dev, MT_TMAC_ODTR(0), ofdm + reg_offset);
mt76_wr(dev, MT_TMAC_ICR0(0),
FIELD_PREP(MT_IFS_EIFS, 360) |
FIELD_PREP(MT_IFS_RIFS, 2) |
FIELD_PREP(MT_IFS_SIFS, sifs) |
FIELD_PREP(MT_IFS_SLOT, phy->slottime));
if (phy->slottime < 20 || !is_2ghz)
val = MT7921_CFEND_RATE_DEFAULT;
else
val = MT7921_CFEND_RATE_11B;
mt76_rmw_field(dev, MT_AGG_ACR0(0), MT_AGG_ACR_CFEND_RATE, val);
mt76_clear(dev, MT_ARB_SCR(0),
MT_ARB_SCR_TX_DISABLE | MT_ARB_SCR_RX_DISABLE);
}
static u8
mt7921_phy_get_nf(struct mt7921_phy *phy, int idx)
{
return 0;
}
static void
mt7921_phy_update_channel(struct mt76_phy *mphy, int idx)
{
struct mt7921_dev *dev = container_of(mphy->dev, struct mt7921_dev, mt76);
struct mt7921_phy *phy = (struct mt7921_phy *)mphy->priv;
struct mt76_channel_state *state;
u64 busy_time, tx_time, rx_time, obss_time;
int nf;
busy_time = mt76_get_field(dev, MT_MIB_SDR9(idx),
MT_MIB_SDR9_BUSY_MASK);
tx_time = mt76_get_field(dev, MT_MIB_SDR36(idx),
MT_MIB_SDR36_TXTIME_MASK);
rx_time = mt76_get_field(dev, MT_MIB_SDR37(idx),
MT_MIB_SDR37_RXTIME_MASK);
obss_time = mt76_get_field(dev, MT_WF_RMAC_MIB_AIRTIME14(idx),
MT_MIB_OBSSTIME_MASK);
nf = mt7921_phy_get_nf(phy, idx);
if (!phy->noise)
phy->noise = nf << 4;
else if (nf)
phy->noise += nf - (phy->noise >> 4);
state = mphy->chan_state;
state->cc_busy += busy_time;
state->cc_tx += tx_time;
state->cc_rx += rx_time + obss_time;
state->cc_bss_rx += rx_time;
state->noise = -(phy->noise >> 4);
}
void mt7921_update_channel(struct mt76_phy *mphy)
{
struct mt7921_dev *dev = container_of(mphy->dev, struct mt7921_dev, mt76);
if (mt76_connac_pm_wake(mphy, &dev->pm))
return;
mt7921_phy_update_channel(mphy, 0);
/* reset obss airtime */
mt76_set(dev, MT_WF_RMAC_MIB_TIME0(0), MT_WF_RMAC_MIB_RXTIME_CLR);
mt76_connac_power_save_sched(mphy, &dev->pm);
}
EXPORT_SYMBOL_GPL(mt7921_update_channel);
static void
mt7921_vif_connect_iter(void *priv, u8 *mac,
struct ieee80211_vif *vif)
{
struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
struct mt7921_dev *dev = mvif->phy->dev;
struct ieee80211_hw *hw = mt76_hw(dev);
if (vif->type == NL80211_IFTYPE_STATION)
ieee80211_disconnect(vif, true);
mt76_connac_mcu_uni_add_dev(&dev->mphy, vif, &mvif->sta.wcid, true);
mt7921_mcu_set_tx(dev, vif);
if (vif->type == NL80211_IFTYPE_AP) {
mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.wcid,
true);
mt7921_mcu_sta_update(dev, NULL, vif, true,
MT76_STA_INFO_STATE_NONE);
mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
}
}
/* system error recovery */
void mt7921_mac_reset_work(struct work_struct *work)
{
struct mt7921_dev *dev = container_of(work, struct mt7921_dev,
reset_work);
struct ieee80211_hw *hw = mt76_hw(dev);
struct mt76_connac_pm *pm = &dev->pm;
int i, ret;
dev_dbg(dev->mt76.dev, "chip reset\n");
dev->hw_full_reset = true;
ieee80211_stop_queues(hw);
cancel_delayed_work_sync(&dev->mphy.mac_work);
cancel_delayed_work_sync(&pm->ps_work);
cancel_work_sync(&pm->wake_work);
for (i = 0; i < 10; i++) {
mutex_lock(&dev->mt76.mutex);
ret = mt7921_dev_reset(dev);
mutex_unlock(&dev->mt76.mutex);
if (!ret)
break;
}
if (i == 10)
dev_err(dev->mt76.dev, "chip reset failed\n");
if (test_and_clear_bit(MT76_HW_SCANNING, &dev->mphy.state)) {
struct cfg80211_scan_info info = {
.aborted = true,
};
ieee80211_scan_completed(dev->mphy.hw, &info);
}
dev->hw_full_reset = false;
pm->suspended = false;
ieee80211_wake_queues(hw);
ieee80211_iterate_active_interfaces(hw,
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7921_vif_connect_iter, NULL);
mt76_connac_power_save_sched(&dev->mt76.phy, pm);
}
void mt7921_reset(struct mt76_dev *mdev)
{
struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
struct mt76_connac_pm *pm = &dev->pm;
if (!dev->hw_init_done)
return;
if (dev->hw_full_reset)
return;
if (pm->suspended)
return;
queue_work(dev->mt76.wq, &dev->reset_work);
}
EXPORT_SYMBOL_GPL(mt7921_reset);
void mt7921_mac_update_mib_stats(struct mt7921_phy *phy)
{
struct mt7921_dev *dev = phy->dev;
struct mib_stats *mib = &phy->mib;
int i, aggr0 = 0, aggr1;
u32 val;
mib->fcs_err_cnt += mt76_get_field(dev, MT_MIB_SDR3(0),
MT_MIB_SDR3_FCS_ERR_MASK);
mib->ack_fail_cnt += mt76_get_field(dev, MT_MIB_MB_BSDR3(0),
MT_MIB_ACK_FAIL_COUNT_MASK);
mib->ba_miss_cnt += mt76_get_field(dev, MT_MIB_MB_BSDR2(0),
MT_MIB_BA_FAIL_COUNT_MASK);
mib->rts_cnt += mt76_get_field(dev, MT_MIB_MB_BSDR0(0),
MT_MIB_RTS_COUNT_MASK);
mib->rts_retries_cnt += mt76_get_field(dev, MT_MIB_MB_BSDR1(0),
MT_MIB_RTS_FAIL_COUNT_MASK);
mib->tx_ampdu_cnt += mt76_rr(dev, MT_MIB_SDR12(0));
mib->tx_mpdu_attempts_cnt += mt76_rr(dev, MT_MIB_SDR14(0));
mib->tx_mpdu_success_cnt += mt76_rr(dev, MT_MIB_SDR15(0));
val = mt76_rr(dev, MT_MIB_SDR32(0));
mib->tx_pkt_ebf_cnt += FIELD_GET(MT_MIB_SDR9_EBF_CNT_MASK, val);
mib->tx_pkt_ibf_cnt += FIELD_GET(MT_MIB_SDR9_IBF_CNT_MASK, val);
val = mt76_rr(dev, MT_ETBF_TX_APP_CNT(0));
mib->tx_bf_ibf_ppdu_cnt += FIELD_GET(MT_ETBF_TX_IBF_CNT, val);
mib->tx_bf_ebf_ppdu_cnt += FIELD_GET(MT_ETBF_TX_EBF_CNT, val);
val = mt76_rr(dev, MT_ETBF_RX_FB_CNT(0));
mib->tx_bf_rx_fb_all_cnt += FIELD_GET(MT_ETBF_RX_FB_ALL, val);
mib->tx_bf_rx_fb_he_cnt += FIELD_GET(MT_ETBF_RX_FB_HE, val);
mib->tx_bf_rx_fb_vht_cnt += FIELD_GET(MT_ETBF_RX_FB_VHT, val);
mib->tx_bf_rx_fb_ht_cnt += FIELD_GET(MT_ETBF_RX_FB_HT, val);
mib->rx_mpdu_cnt += mt76_rr(dev, MT_MIB_SDR5(0));
mib->rx_ampdu_cnt += mt76_rr(dev, MT_MIB_SDR22(0));
mib->rx_ampdu_bytes_cnt += mt76_rr(dev, MT_MIB_SDR23(0));
mib->rx_ba_cnt += mt76_rr(dev, MT_MIB_SDR31(0));
for (i = 0; i < ARRAY_SIZE(mib->tx_amsdu); i++) {
val = mt76_rr(dev, MT_PLE_AMSDU_PACK_MSDU_CNT(i));
mib->tx_amsdu[i] += val;
mib->tx_amsdu_cnt += val;
}
for (i = 0, aggr1 = aggr0 + 8; i < 4; i++) {
u32 val2;
val = mt76_rr(dev, MT_TX_AGG_CNT(0, i));
val2 = mt76_rr(dev, MT_TX_AGG_CNT2(0, i));
dev->mt76.aggr_stats[aggr0++] += val & 0xffff;
dev->mt76.aggr_stats[aggr0++] += val >> 16;
dev->mt76.aggr_stats[aggr1++] += val2 & 0xffff;
dev->mt76.aggr_stats[aggr1++] += val2 >> 16;
}
}
void mt7921_mac_work(struct work_struct *work)
{
struct mt7921_phy *phy;
struct mt76_phy *mphy;
mphy = (struct mt76_phy *)container_of(work, struct mt76_phy,
mac_work.work);
phy = mphy->priv;
mt7921_mutex_acquire(phy->dev);
mt76_update_survey(mphy);
if (++mphy->mac_work_count == 2) {
mphy->mac_work_count = 0;
mt7921_mac_update_mib_stats(phy);
}
mt7921_mutex_release(phy->dev);
mt76_tx_status_check(mphy->dev, false);
ieee80211_queue_delayed_work(phy->mt76->hw, &mphy->mac_work,
MT7921_WATCHDOG_TIME);
}
void mt7921_pm_wake_work(struct work_struct *work)
{
struct mt7921_dev *dev;
struct mt76_phy *mphy;
dev = (struct mt7921_dev *)container_of(work, struct mt7921_dev,
pm.wake_work);
mphy = dev->phy.mt76;
if (!mt7921_mcu_drv_pmctrl(dev)) {
struct mt76_dev *mdev = &dev->mt76;
int i;
if (mt76_is_sdio(mdev)) {
mt76_connac_pm_dequeue_skbs(mphy, &dev->pm);
mt76_worker_schedule(&mdev->sdio.txrx_worker);
} else {
local_bh_disable();
mt76_for_each_q_rx(mdev, i)
napi_schedule(&mdev->napi[i]);
local_bh_enable();
mt76_connac_pm_dequeue_skbs(mphy, &dev->pm);
mt76_connac_tx_cleanup(mdev);
}
if (test_bit(MT76_STATE_RUNNING, &mphy->state))
ieee80211_queue_delayed_work(mphy->hw, &mphy->mac_work,
MT7921_WATCHDOG_TIME);
}
ieee80211_wake_queues(mphy->hw);
wake_up(&dev->pm.wait);
}
void mt7921_pm_power_save_work(struct work_struct *work)
{
struct mt7921_dev *dev;
unsigned long delta;
struct mt76_phy *mphy;
dev = (struct mt7921_dev *)container_of(work, struct mt7921_dev,
pm.ps_work.work);
mphy = dev->phy.mt76;
delta = dev->pm.idle_timeout;
if (test_bit(MT76_HW_SCANNING, &mphy->state) ||
test_bit(MT76_HW_SCHED_SCANNING, &mphy->state) ||
dev->fw_assert)
goto out;
if (mutex_is_locked(&dev->mt76.mutex))
/* if mt76 mutex is held we should not put the device
* to sleep since we are currently accessing device
* register map. We need to wait for the next power_save
* trigger.
*/
goto out;
if (time_is_after_jiffies(dev->pm.last_activity + delta)) {
delta = dev->pm.last_activity + delta - jiffies;
goto out;
}
if (!mt7921_mcu_fw_pmctrl(dev)) {
cancel_delayed_work_sync(&mphy->mac_work);
return;
}
out:
queue_delayed_work(dev->mt76.wq, &dev->pm.ps_work, delta);
}
void mt7921_coredump_work(struct work_struct *work)
{
struct mt7921_dev *dev;
char *dump, *data;
dev = (struct mt7921_dev *)container_of(work, struct mt7921_dev,
coredump.work.work);
if (time_is_after_jiffies(dev->coredump.last_activity +
4 * MT76_CONNAC_COREDUMP_TIMEOUT)) {
queue_delayed_work(dev->mt76.wq, &dev->coredump.work,
MT76_CONNAC_COREDUMP_TIMEOUT);
return;
}
dump = vzalloc(MT76_CONNAC_COREDUMP_SZ);
data = dump;
while (true) {
struct sk_buff *skb;
spin_lock_bh(&dev->mt76.lock);
skb = __skb_dequeue(&dev->coredump.msg_list);
spin_unlock_bh(&dev->mt76.lock);
if (!skb)
break;
skb_pull(skb, sizeof(struct mt76_connac2_mcu_rxd));
if (!dump || data + skb->len - dump > MT76_CONNAC_COREDUMP_SZ) {
dev_kfree_skb(skb);
continue;
}
memcpy(data, skb->data, skb->len);
data += skb->len;
dev_kfree_skb(skb);
}
if (dump)
dev_coredumpv(dev->mt76.dev, dump, MT76_CONNAC_COREDUMP_SZ,
GFP_KERNEL);
mt7921_reset(&dev->mt76);
}
/* usb_sdio */
static void
mt7921_usb_sdio_write_txwi(struct mt7921_dev *dev, struct mt76_wcid *wcid,
enum mt76_txq_id qid, struct ieee80211_sta *sta,
struct ieee80211_key_conf *key, int pid,
struct sk_buff *skb)
{
__le32 *txwi = (__le32 *)(skb->data - MT_SDIO_TXD_SIZE);
memset(txwi, 0, MT_SDIO_TXD_SIZE);
mt76_connac2_mac_write_txwi(&dev->mt76, txwi, skb, wcid, key, pid, qid, 0);
skb_push(skb, MT_SDIO_TXD_SIZE);
}
int mt7921_usb_sdio_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
enum mt76_txq_id qid, struct mt76_wcid *wcid,
struct ieee80211_sta *sta,
struct mt76_tx_info *tx_info)
{
struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
struct ieee80211_key_conf *key = info->control.hw_key;
struct sk_buff *skb = tx_info->skb;
int err, pad, pktid, type;
if (unlikely(tx_info->skb->len <= ETH_HLEN))
return -EINVAL;
err = skb_cow_head(skb, MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE);
if (err)
return err;
if (!wcid)
wcid = &dev->mt76.global_wcid;
if (sta) {
struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv;
if (time_after(jiffies, msta->last_txs + HZ / 4)) {
info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
msta->last_txs = jiffies;
}
}
pktid = mt76_tx_status_skb_add(&dev->mt76, wcid, skb);
mt7921_usb_sdio_write_txwi(dev, wcid, qid, sta, key, pktid, skb);
type = mt76_is_sdio(mdev) ? MT7921_SDIO_DATA : 0;
mt7921_skb_add_usb_sdio_hdr(dev, skb, type);
pad = round_up(skb->len, 4) - skb->len;
if (mt76_is_usb(mdev))
pad += 4;
err = mt76_skb_adjust_pad(skb, pad);
if (err)
/* Release pktid in case of error. */
idr_remove(&wcid->pktid, pktid);
return err;
}
EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_prepare_skb);
void mt7921_usb_sdio_tx_complete_skb(struct mt76_dev *mdev,
struct mt76_queue_entry *e)
{
__le32 *txwi = (__le32 *)(e->skb->data + MT_SDIO_HDR_SIZE);
unsigned int headroom = MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
struct ieee80211_sta *sta;
struct mt76_wcid *wcid;
u16 idx;
idx = le32_get_bits(txwi[1], MT_TXD1_WLAN_IDX);
wcid = rcu_dereference(mdev->wcid[idx]);
sta = wcid_to_sta(wcid);
if (sta && likely(e->skb->protocol != cpu_to_be16(ETH_P_PAE)))
mt7921_tx_check_aggr(sta, txwi);
skb_pull(e->skb, headroom);
mt76_tx_complete_skb(mdev, e->wcid, e->skb);
}
EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_complete_skb);
bool mt7921_usb_sdio_tx_status_data(struct mt76_dev *mdev, u8 *update)
{
struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
mt7921_mutex_acquire(dev);
mt7921_mac_sta_poll(dev);
mt7921_mutex_release(dev);
return false;
}
EXPORT_SYMBOL_GPL(mt7921_usb_sdio_tx_status_data);
#if IS_ENABLED(CONFIG_IPV6)
void mt7921_set_ipv6_ns_work(struct work_struct *work)
{
struct mt7921_dev *dev = container_of(work, struct mt7921_dev,
ipv6_ns_work);
struct sk_buff *skb;
int ret = 0;
do {
skb = skb_dequeue(&dev->ipv6_ns_list);
if (!skb)
break;
mt7921_mutex_acquire(dev);
ret = mt76_mcu_skb_send_msg(&dev->mt76, skb,
MCU_UNI_CMD(OFFLOAD), true);
mt7921_mutex_release(dev);
} while (!ret);
if (ret)
skb_queue_purge(&dev->ipv6_ns_list);
}
#endif