// SPDX-License-Identifier: ISC
/* Copyright (C) 2020 MediaTek Inc. */

#include <linux/etherdevice.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/module.h>
#include "mt7915.h"
#include "mcu.h"

static bool mt7915_dev_running(struct mt7915_dev *dev)
{
	struct mt7915_phy *phy;

	if (test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
		return true;

	phy = mt7915_ext_phy(dev);

	return phy && test_bit(MT76_STATE_RUNNING, &phy->mt76->state);
}

static int mt7915_start(struct ieee80211_hw *hw)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	bool running;

	mutex_lock(&dev->mt76.mutex);

	running = mt7915_dev_running(dev);

	if (!running) {
		mt7915_mcu_set_pm(dev, 0, 0);
		mt7915_mcu_set_mac(dev, 0, true, false);
		mt7915_mcu_set_scs(dev, 0, true);
	}

	if (phy != &dev->phy) {
		mt7915_mcu_set_pm(dev, 1, 0);
		mt7915_mcu_set_mac(dev, 1, true, false);
		mt7915_mcu_set_scs(dev, 1, true);
	}

	mt7915_mcu_set_sku_en(phy, true);
	mt7915_mcu_set_chan_info(phy, MCU_EXT_CMD_SET_RX_PATH);

	set_bit(MT76_STATE_RUNNING, &phy->mt76->state);

	ieee80211_queue_delayed_work(hw, &phy->mac_work,
				     MT7915_WATCHDOG_TIME);

	if (!running)
		mt7915_mac_reset_counters(phy);

	mutex_unlock(&dev->mt76.mutex);

	return 0;
}

static void mt7915_stop(struct ieee80211_hw *hw)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);

	cancel_delayed_work_sync(&phy->mac_work);

	mutex_lock(&dev->mt76.mutex);

	clear_bit(MT76_STATE_RUNNING, &phy->mt76->state);

	if (phy != &dev->phy) {
		mt7915_mcu_set_pm(dev, 1, 1);
		mt7915_mcu_set_mac(dev, 1, false, false);
	}

	if (!mt7915_dev_running(dev)) {
		mt7915_mcu_set_pm(dev, 0, 1);
		mt7915_mcu_set_mac(dev, 0, false, false);
	}

	mutex_unlock(&dev->mt76.mutex);
}

static int get_omac_idx(enum nl80211_iftype type, u32 mask)
{
	int i;

	switch (type) {
	case NL80211_IFTYPE_MONITOR:
	case NL80211_IFTYPE_AP:
		/* ap uses hw bssid 0 and ext bssid */
		if (~mask & BIT(HW_BSSID_0))
			return HW_BSSID_0;

		for (i = EXT_BSSID_1; i < EXT_BSSID_END; i++)
			if (~mask & BIT(i))
				return i;
		break;
	case NL80211_IFTYPE_MESH_POINT:
	case NL80211_IFTYPE_ADHOC:
	case NL80211_IFTYPE_STATION:
		/* station uses hw bssid other than 0 */
		for (i = HW_BSSID_1; i < HW_BSSID_MAX; i++)
			if (~mask & BIT(i))
				return i;
		break;
	default:
		WARN_ON(1);
		break;
	}

	return -1;
}

static int mt7915_add_interface(struct ieee80211_hw *hw,
				struct ieee80211_vif *vif)
{
	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	struct mt76_txq *mtxq;
	bool ext_phy = phy != &dev->phy;
	int idx, ret = 0;

	mutex_lock(&dev->mt76.mutex);

	mvif->idx = ffs(~phy->vif_mask) - 1;
	if (mvif->idx >= MT7915_MAX_INTERFACES) {
		ret = -ENOSPC;
		goto out;
	}

	idx = get_omac_idx(vif->type, phy->omac_mask);
	if (idx < 0) {
		ret = -ENOSPC;
		goto out;
	}
	mvif->omac_idx = idx;
	mvif->dev = dev;
	mvif->band_idx = ext_phy;

	if (ext_phy)
		mvif->wmm_idx = ext_phy * (MT7915_MAX_WMM_SETS / 2) +
				mvif->idx % (MT7915_MAX_WMM_SETS / 2);
	else
		mvif->wmm_idx = mvif->idx % MT7915_MAX_WMM_SETS;

	ret = mt7915_mcu_add_dev_info(dev, vif, true);
	if (ret)
		goto out;

	phy->vif_mask |= BIT(mvif->idx);
	phy->omac_mask |= BIT(mvif->omac_idx);

	idx = MT7915_WTBL_RESERVED - mvif->idx;

	INIT_LIST_HEAD(&mvif->sta.poll_list);
	mvif->sta.wcid.idx = idx;
	mvif->sta.wcid.ext_phy = mvif->band_idx;
	mvif->sta.wcid.hw_key_idx = -1;
	mvif->sta.wcid.tx_info |= MT_WCID_TX_INFO_SET;
	mt7915_mac_wtbl_update(dev, idx,
			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);

	rcu_assign_pointer(dev->mt76.wcid[idx], &mvif->sta.wcid);
	if (vif->txq) {
		mtxq = (struct mt76_txq *)vif->txq->drv_priv;
		mtxq->wcid = &mvif->sta.wcid;
		mt76_txq_init(&dev->mt76, vif->txq);
	}

out:
	mutex_unlock(&dev->mt76.mutex);

	return ret;
}

static void mt7915_remove_interface(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif)
{
	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
	struct mt7915_sta *msta = &mvif->sta;
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	int idx = msta->wcid.idx;

	/* TODO: disable beacon for the bss */

	mt7915_mcu_add_dev_info(dev, vif, false);

	rcu_assign_pointer(dev->mt76.wcid[idx], NULL);
	if (vif->txq)
		mt76_txq_remove(&dev->mt76, vif->txq);

	mutex_lock(&dev->mt76.mutex);
	phy->vif_mask &= ~BIT(mvif->idx);
	phy->omac_mask &= ~BIT(mvif->omac_idx);
	mutex_unlock(&dev->mt76.mutex);

	spin_lock_bh(&dev->sta_poll_lock);
	if (!list_empty(&msta->poll_list))
		list_del_init(&msta->poll_list);
	spin_unlock_bh(&dev->sta_poll_lock);
}

static void mt7915_init_dfs_state(struct mt7915_phy *phy)
{
	struct mt76_phy *mphy = phy->mt76;
	struct ieee80211_hw *hw = mphy->hw;
	struct cfg80211_chan_def *chandef = &hw->conf.chandef;

	if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
		return;

	if (!(chandef->chan->flags & IEEE80211_CHAN_RADAR))
		return;

	if (mphy->chandef.chan->center_freq == chandef->chan->center_freq &&
	    mphy->chandef.width == chandef->width)
		return;

	phy->dfs_state = -1;
}

static int mt7915_set_channel(struct mt7915_phy *phy)
{
	struct mt7915_dev *dev = phy->dev;
	int ret;

	cancel_delayed_work_sync(&phy->mac_work);

	mutex_lock(&dev->mt76.mutex);
	set_bit(MT76_RESET, &phy->mt76->state);

	mt7915_init_dfs_state(phy);
	mt76_set_channel(phy->mt76);

	ret = mt7915_mcu_set_chan_info(phy, MCU_EXT_CMD_CHANNEL_SWITCH);
	if (ret)
		goto out;

	mt7915_mac_set_timing(phy);
	ret = mt7915_dfs_init_radar_detector(phy);
	mt7915_mac_cca_stats_reset(phy);

	mt7915_mac_reset_counters(phy);
	phy->noise = 0;

out:
	clear_bit(MT76_RESET, &phy->mt76->state);
	mutex_unlock(&dev->mt76.mutex);

	mt76_txq_schedule_all(phy->mt76);
	ieee80211_queue_delayed_work(phy->mt76->hw, &phy->mac_work,
				     MT7915_WATCHDOG_TIME);

	return ret;
}

static int mt7915_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
			  struct ieee80211_vif *vif, struct ieee80211_sta *sta,
			  struct ieee80211_key_conf *key)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
	struct mt7915_sta *msta = sta ? (struct mt7915_sta *)sta->drv_priv :
				  &mvif->sta;
	struct mt76_wcid *wcid = &msta->wcid;
	int idx = key->keyidx;

	/* The hardware does not support per-STA RX GTK, fallback
	 * to software mode for these.
	 */
	if ((vif->type == NL80211_IFTYPE_ADHOC ||
	     vif->type == NL80211_IFTYPE_MESH_POINT) &&
	    (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
	     key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
		return -EOPNOTSUPP;

	/* fall back to sw encryption for unsupported ciphers */
	switch (key->cipher) {
	case WLAN_CIPHER_SUITE_AES_CMAC:
		key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIE;
		break;
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
	case WLAN_CIPHER_SUITE_TKIP:
	case WLAN_CIPHER_SUITE_CCMP:
	case WLAN_CIPHER_SUITE_CCMP_256:
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
	case WLAN_CIPHER_SUITE_SMS4:
		break;
	default:
		return -EOPNOTSUPP;
	}

	if (cmd == SET_KEY) {
		key->hw_key_idx = wcid->idx;
		wcid->hw_key_idx = idx;
	} else if (idx == wcid->hw_key_idx) {
		wcid->hw_key_idx = -1;
	}
	mt76_wcid_key_setup(&dev->mt76, wcid,
			    cmd == SET_KEY ? key : NULL);

	return mt7915_mcu_add_key(dev, vif, msta, key, cmd);
}

static int mt7915_config(struct ieee80211_hw *hw, u32 changed)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	bool band = phy != &dev->phy;
	int ret;

	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
		ieee80211_stop_queues(hw);
		ret = mt7915_set_channel(phy);
		if (ret)
			return ret;
		ieee80211_wake_queues(hw);
	}

	if (changed & IEEE80211_CONF_CHANGE_POWER) {
		ret = mt7915_mcu_set_sku(phy);
		if (ret)
			return ret;
	}

	mutex_lock(&dev->mt76.mutex);

	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
		if (!(hw->conf.flags & IEEE80211_CONF_MONITOR))
			phy->rxfilter |= MT_WF_RFCR_DROP_OTHER_UC;
		else
			phy->rxfilter &= ~MT_WF_RFCR_DROP_OTHER_UC;

		mt76_wr(dev, MT_WF_RFCR(band), phy->rxfilter);
	}

	mutex_unlock(&dev->mt76.mutex);

	return 0;
}

static int
mt7915_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
	       const struct ieee80211_tx_queue_params *params)
{
	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;

	/* no need to update right away, we'll get BSS_CHANGED_QOS */
	mvif->wmm[queue].cw_min = params->cw_min;
	mvif->wmm[queue].cw_max = params->cw_max;
	mvif->wmm[queue].aifs = params->aifs;
	mvif->wmm[queue].txop = params->txop;

	return 0;
}

static void mt7915_configure_filter(struct ieee80211_hw *hw,
				    unsigned int changed_flags,
				    unsigned int *total_flags,
				    u64 multicast)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	bool band = phy != &dev->phy;

	u32 ctl_flags = MT_WF_RFCR1_DROP_ACK |
			MT_WF_RFCR1_DROP_BF_POLL |
			MT_WF_RFCR1_DROP_BA |
			MT_WF_RFCR1_DROP_CFEND |
			MT_WF_RFCR1_DROP_CFACK;
	u32 flags = 0;

#define MT76_FILTER(_flag, _hw) do {					\
		flags |= *total_flags & FIF_##_flag;			\
		phy->rxfilter &= ~(_hw);				\
		phy->rxfilter |= !(flags & FIF_##_flag) * (_hw);	\
	} while (0)

	phy->rxfilter &= ~(MT_WF_RFCR_DROP_OTHER_BSS |
			   MT_WF_RFCR_DROP_OTHER_BEACON |
			   MT_WF_RFCR_DROP_FRAME_REPORT |
			   MT_WF_RFCR_DROP_PROBEREQ |
			   MT_WF_RFCR_DROP_MCAST_FILTERED |
			   MT_WF_RFCR_DROP_MCAST |
			   MT_WF_RFCR_DROP_BCAST |
			   MT_WF_RFCR_DROP_DUPLICATE |
			   MT_WF_RFCR_DROP_A2_BSSID |
			   MT_WF_RFCR_DROP_UNWANTED_CTL |
			   MT_WF_RFCR_DROP_STBC_MULTI);

	MT76_FILTER(OTHER_BSS, MT_WF_RFCR_DROP_OTHER_TIM |
			       MT_WF_RFCR_DROP_A3_MAC |
			       MT_WF_RFCR_DROP_A3_BSSID);

	MT76_FILTER(FCSFAIL, MT_WF_RFCR_DROP_FCSFAIL);

	MT76_FILTER(CONTROL, MT_WF_RFCR_DROP_CTS |
			     MT_WF_RFCR_DROP_RTS |
			     MT_WF_RFCR_DROP_CTL_RSV |
			     MT_WF_RFCR_DROP_NDPA);

	*total_flags = flags;
	mt76_wr(dev, MT_WF_RFCR(band), phy->rxfilter);

	if (*total_flags & FIF_CONTROL)
		mt76_clear(dev, MT_WF_RFCR1(band), ctl_flags);
	else
		mt76_set(dev, MT_WF_RFCR1(band), ctl_flags);
}

static void mt7915_bss_info_changed(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
				    struct ieee80211_bss_conf *info,
				    u32 changed)
{
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	struct mt7915_dev *dev = mt7915_hw_dev(hw);

	mutex_lock(&dev->mt76.mutex);

	/*
	 * station mode uses BSSID to map the wlan entry to a peer,
	 * and then peer references bss_info_rfch to set bandwidth cap.
	 */
	if (changed & BSS_CHANGED_BSSID &&
	    vif->type == NL80211_IFTYPE_STATION) {
		bool join = !is_zero_ether_addr(info->bssid);

		mt7915_mcu_add_bss_info(phy, vif, join);
		mt7915_mcu_add_sta(dev, vif, NULL, join);
	}

	if (changed & BSS_CHANGED_ASSOC) {
		mt7915_mcu_add_bss_info(phy, vif, info->assoc);
		mt7915_mcu_add_obss_spr(dev, vif, info->he_obss_pd.enable);
	}

	if (changed & BSS_CHANGED_ERP_SLOT) {
		int slottime = info->use_short_slot ? 9 : 20;

		if (slottime != phy->slottime) {
			phy->slottime = slottime;
			mt7915_mac_set_timing(phy);
		}
	}

	if (changed & BSS_CHANGED_BEACON_ENABLED) {
		mt7915_mcu_add_bss_info(phy, vif, info->enable_beacon);
		mt7915_mcu_add_sta(dev, vif, NULL, info->enable_beacon);
	}

	/* ensure that enable txcmd_mode after bss_info */
	if (changed & (BSS_CHANGED_QOS | BSS_CHANGED_BEACON_ENABLED))
		mt7915_mcu_set_tx(dev, vif);

	if (changed & BSS_CHANGED_HE_OBSS_PD)
		mt7915_mcu_add_obss_spr(dev, vif, info->he_obss_pd.enable);

	if (changed & (BSS_CHANGED_BEACON |
		       BSS_CHANGED_BEACON_ENABLED))
		mt7915_mcu_add_beacon(hw, vif, info->enable_beacon);

	mutex_unlock(&dev->mt76.mutex);
}

static void
mt7915_channel_switch_beacon(struct ieee80211_hw *hw,
			     struct ieee80211_vif *vif,
			     struct cfg80211_chan_def *chandef)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);

	mutex_lock(&dev->mt76.mutex);
	mt7915_mcu_add_beacon(hw, vif, true);
	mutex_unlock(&dev->mt76.mutex);
}

int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
		       struct ieee80211_sta *sta)
{
	struct mt7915_dev *dev = container_of(mdev, struct mt7915_dev, mt76);
	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
	int ret, idx;

	idx = mt76_wcid_alloc(dev->mt76.wcid_mask, MT7915_WTBL_STA - 1);
	if (idx < 0)
		return -ENOSPC;

	INIT_LIST_HEAD(&msta->poll_list);
	INIT_WORK(&msta->stats_work, mt7915_mac_sta_stats_work);
	spin_lock_init(&msta->ampdu_lock);
	msta->vif = mvif;
	msta->wcid.sta = 1;
	msta->wcid.idx = idx;
	msta->wcid.ext_phy = mvif->band_idx;
	msta->wcid.tx_info |= MT_WCID_TX_INFO_SET;
	msta->stats.jiffies = jiffies;

	mt7915_mac_wtbl_update(dev, idx,
			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);

	ret = mt7915_mcu_add_sta(dev, vif, sta, true);
	if (ret)
		return ret;

	return mt7915_mcu_add_sta_adv(dev, vif, sta, true);
}

void mt7915_mac_sta_remove(struct mt76_dev *mdev, struct ieee80211_vif *vif,
			   struct ieee80211_sta *sta)
{
	struct mt7915_dev *dev = container_of(mdev, struct mt7915_dev, mt76);
	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;

	mt7915_mcu_add_sta_adv(dev, vif, sta, false);
	mt7915_mcu_add_sta(dev, vif, sta, false);

	mt7915_mac_wtbl_update(dev, msta->wcid.idx,
			       MT_WTBL_UPDATE_ADM_COUNT_CLEAR);

	spin_lock_bh(&dev->sta_poll_lock);
	if (!list_empty(&msta->poll_list))
		list_del_init(&msta->poll_list);
	spin_unlock_bh(&dev->sta_poll_lock);
}

static void mt7915_tx(struct ieee80211_hw *hw,
		      struct ieee80211_tx_control *control,
		      struct sk_buff *skb)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt76_phy *mphy = hw->priv;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_vif *vif = info->control.vif;
	struct mt76_wcid *wcid = &dev->mt76.global_wcid;

	if (control->sta) {
		struct mt7915_sta *sta;

		sta = (struct mt7915_sta *)control->sta->drv_priv;
		wcid = &sta->wcid;
	}

	if (vif && !control->sta) {
		struct mt7915_vif *mvif;

		mvif = (struct mt7915_vif *)vif->drv_priv;
		wcid = &mvif->sta.wcid;
	}

	mt76_tx(mphy, control->sta, wcid, skb);
}

static int mt7915_set_rts_threshold(struct ieee80211_hw *hw, u32 val)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);

	mutex_lock(&dev->mt76.mutex);
	mt7915_mcu_set_rts_thresh(phy, val);
	mutex_unlock(&dev->mt76.mutex);

	return 0;
}

static int
mt7915_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		    struct ieee80211_ampdu_params *params)
{
	enum ieee80211_ampdu_mlme_action action = params->action;
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct ieee80211_sta *sta = params->sta;
	struct ieee80211_txq *txq = sta->txq[params->tid];
	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
	u16 tid = params->tid;
	u16 ssn = params->ssn;
	struct mt76_txq *mtxq;
	int ret = 0;

	if (!txq)
		return -EINVAL;

	mtxq = (struct mt76_txq *)txq->drv_priv;

	mutex_lock(&dev->mt76.mutex);
	switch (action) {
	case IEEE80211_AMPDU_RX_START:
		mt76_rx_aggr_start(&dev->mt76, &msta->wcid, tid, ssn,
				   params->buf_size);
		mt7915_mcu_add_rx_ba(dev, params, true);
		break;
	case IEEE80211_AMPDU_RX_STOP:
		mt76_rx_aggr_stop(&dev->mt76, &msta->wcid, tid);
		mt7915_mcu_add_rx_ba(dev, params, false);
		break;
	case IEEE80211_AMPDU_TX_OPERATIONAL:
		mtxq->aggr = true;
		mtxq->send_bar = false;
		mt7915_set_aggr_state(msta, tid, MT7915_AGGR_OPERATIONAL);
		mt7915_mcu_add_tx_ba(dev, params, true);
		break;
	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
		mtxq->aggr = false;
		mt7915_set_aggr_state(msta, tid, MT7915_AGGR_STOP);
		mt7915_mcu_add_tx_ba(dev, params, false);
		break;
	case IEEE80211_AMPDU_TX_START:
		mtxq->agg_ssn = IEEE80211_SN_TO_SEQ(ssn);
		mt7915_set_aggr_state(msta, tid, MT7915_AGGR_START);
		ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
		break;
	case IEEE80211_AMPDU_TX_STOP_CONT:
		mtxq->aggr = false;
		mt7915_set_aggr_state(msta, tid, MT7915_AGGR_STOP);
		mt7915_mcu_add_tx_ba(dev, params, false);
		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		break;
	}
	mutex_unlock(&dev->mt76.mutex);

	return ret;
}

static int
mt7915_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
	       struct ieee80211_sta *sta)
{
	return mt76_sta_state(hw, vif, sta, IEEE80211_STA_NOTEXIST,
			      IEEE80211_STA_NONE);
}

static int
mt7915_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		  struct ieee80211_sta *sta)
{
	return mt76_sta_state(hw, vif, sta, IEEE80211_STA_NONE,
			      IEEE80211_STA_NOTEXIST);
}

static int
mt7915_get_stats(struct ieee80211_hw *hw,
		 struct ieee80211_low_level_stats *stats)
{
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	struct mib_stats *mib = &phy->mib;

	stats->dot11RTSSuccessCount = mib->rts_cnt;
	stats->dot11RTSFailureCount = mib->rts_retries_cnt;
	stats->dot11FCSErrorCount = mib->fcs_err_cnt;
	stats->dot11ACKFailureCount = mib->ack_fail_cnt;

	return 0;
}

static u64
mt7915_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	bool band = phy != &dev->phy;
	union {
		u64 t64;
		u32 t32[2];
	} tsf;
	u16 n;

	mutex_lock(&dev->mt76.mutex);

	n = mvif->omac_idx > HW_BSSID_MAX ? HW_BSSID_0 : mvif->omac_idx;
	/* TSF software read */
	mt76_set(dev, MT_LPON_TCR(band, n), MT_LPON_TCR_SW_MODE);
	tsf.t32[0] = mt76_rr(dev, MT_LPON_UTTR0(band));
	tsf.t32[1] = mt76_rr(dev, MT_LPON_UTTR1(band));

	mutex_unlock(&dev->mt76.mutex);

	return tsf.t64;
}

static void
mt7915_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
	       u64 timestamp)
{
	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	bool band = phy != &dev->phy;
	union {
		u64 t64;
		u32 t32[2];
	} tsf = { .t64 = timestamp, };
	u16 n;

	mutex_lock(&dev->mt76.mutex);

	n = mvif->omac_idx > HW_BSSID_MAX ? HW_BSSID_0 : mvif->omac_idx;
	mt76_wr(dev, MT_LPON_UTTR0(band), tsf.t32[0]);
	mt76_wr(dev, MT_LPON_UTTR1(band), tsf.t32[1]);
	/* TSF software overwrite */
	mt76_set(dev, MT_LPON_TCR(band, n), MT_LPON_TCR_SW_WRITE);

	mutex_unlock(&dev->mt76.mutex);
}

static void
mt7915_set_coverage_class(struct ieee80211_hw *hw, s16 coverage_class)
{
	struct mt7915_phy *phy = mt7915_hw_phy(hw);

	phy->coverage_class = max_t(s16, coverage_class, 0);
	mt7915_mac_set_timing(phy);
}

static int
mt7915_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
{
	struct mt7915_dev *dev = mt7915_hw_dev(hw);
	struct mt7915_phy *phy = mt7915_hw_phy(hw);
	int max_nss = hweight8(hw->wiphy->available_antennas_tx);
	bool ext_phy = phy != &dev->phy;

	if (!tx_ant || tx_ant != rx_ant || ffs(tx_ant) > max_nss)
		return -EINVAL;

	if ((BIT(hweight8(tx_ant)) - 1) != tx_ant)
		tx_ant = BIT(ffs(tx_ant) - 1) - 1;

	mutex_lock(&dev->mt76.mutex);

	phy->mt76->antenna_mask = tx_ant;

	if (ext_phy) {
		if (dev->chainmask == 0xf)
			tx_ant <<= 2;
		else
			tx_ant <<= 1;
	}
	phy->chainmask = tx_ant;

	mt76_set_stream_caps(phy->mt76, true);
	mt7915_set_stream_vht_txbf_caps(phy);
	mt7915_set_stream_he_caps(phy);

	mutex_unlock(&dev->mt76.mutex);

	return 0;
}

static void mt7915_sta_statistics(struct ieee80211_hw *hw,
				  struct ieee80211_vif *vif,
				  struct ieee80211_sta *sta,
				  struct station_info *sinfo)
{
	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
	struct mt7915_sta_stats *stats = &msta->stats;

	if (!stats->tx_rate.legacy && !stats->tx_rate.flags)
		return;

	if (stats->tx_rate.legacy) {
		sinfo->txrate.legacy = stats->tx_rate.legacy;
	} else {
		sinfo->txrate.mcs = stats->tx_rate.mcs;
		sinfo->txrate.nss = stats->tx_rate.nss;
		sinfo->txrate.bw = stats->tx_rate.bw;
		sinfo->txrate.he_gi = stats->tx_rate.he_gi;
		sinfo->txrate.he_dcm = stats->tx_rate.he_dcm;
		sinfo->txrate.he_ru_alloc = stats->tx_rate.he_ru_alloc;
	}
	sinfo->txrate.flags = stats->tx_rate.flags;
	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
}

static void
mt7915_sta_rc_update(struct ieee80211_hw *hw,
		     struct ieee80211_vif *vif,
		     struct ieee80211_sta *sta,
		     u32 changed)
{
	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;

	rcu_read_lock();
	sta = ieee80211_find_sta(vif, sta->addr);
	if (!sta) {
		rcu_read_unlock();
		return;
	}
	rcu_read_unlock();

	set_bit(changed, &msta->stats.changed);
	ieee80211_queue_work(hw, &msta->stats_work);
}

const struct ieee80211_ops mt7915_ops = {
	.tx = mt7915_tx,
	.start = mt7915_start,
	.stop = mt7915_stop,
	.add_interface = mt7915_add_interface,
	.remove_interface = mt7915_remove_interface,
	.config = mt7915_config,
	.conf_tx = mt7915_conf_tx,
	.configure_filter = mt7915_configure_filter,
	.bss_info_changed = mt7915_bss_info_changed,
	.sta_add = mt7915_sta_add,
	.sta_remove = mt7915_sta_remove,
	.sta_pre_rcu_remove = mt76_sta_pre_rcu_remove,
	.sta_rc_update = mt7915_sta_rc_update,
	.set_key = mt7915_set_key,
	.ampdu_action = mt7915_ampdu_action,
	.set_rts_threshold = mt7915_set_rts_threshold,
	.wake_tx_queue = mt76_wake_tx_queue,
	.sw_scan_start = mt76_sw_scan,
	.sw_scan_complete = mt76_sw_scan_complete,
	.release_buffered_frames = mt76_release_buffered_frames,
	.get_txpower = mt76_get_txpower,
	.channel_switch_beacon = mt7915_channel_switch_beacon,
	.get_stats = mt7915_get_stats,
	.get_tsf = mt7915_get_tsf,
	.set_tsf = mt7915_set_tsf,
	.get_survey = mt76_get_survey,
	.get_antenna = mt76_get_antenna,
	.set_antenna = mt7915_set_antenna,
	.set_coverage_class = mt7915_set_coverage_class,
	.sta_statistics = mt7915_sta_statistics,
#ifdef CONFIG_MAC80211_DEBUGFS
	.sta_add_debugfs = mt7915_sta_add_debugfs,
#endif
};