mt76: mt7921: refactor mac.c to be bus independent

This is a preliminary patch to introduce mt7921s support.

Split out a new pci_mac.c from mac.c to make mac.c reusable between
mt7921s and mt7921e.

Tested-by: Deren Wu <deren.wu@mediatek.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 7 insertions, 335 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index 0659ff290af9..0857d523bb06 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -49,7 +49,7 @@ bool mt7921_mac_wtbl_update(struct mt7921_dev *dev, int idx, u32 mask)
 			 0, 5000);
 }
 
-static void mt7921_mac_sta_poll(struct mt7921_dev *dev)
+void mt7921_mac_sta_poll(struct mt7921_dev *dev)
 {
 	static const u8 ac_to_tid[] = {
 		[IEEE80211_AC_BE] = 0,
@@ -68,8 +68,6 @@ static void mt7921_mac_sta_poll(struct mt7921_dev *dev)
 	list_splice_init(&dev->sta_poll_list, &sta_poll_list);
 	spin_unlock_bh(&dev->sta_poll_lock);
 
-	rcu_read_lock();
-
 	while (true) {
 		bool clear = false;
 		u32 addr, val;
@@ -166,8 +164,6 @@ static void mt7921_mac_sta_poll(struct mt7921_dev *dev)
 				rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
 		}
 	}
-
-	rcu_read_unlock();
 }
 
 static void
@@ -836,11 +832,10 @@ mt7921_mac_write_txwi_80211(struct mt7921_dev *dev, __le32 *txwi,
 	txwi[7] |= cpu_to_le32(val);
 }
 
-static void
-mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
-		      struct sk_buff *skb, struct mt76_wcid *wcid,
-		      struct ieee80211_key_conf *key, int pid,
-		      bool beacon)
+void mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
+			   struct sk_buff *skb, struct mt76_wcid *wcid,
+			   struct ieee80211_key_conf *key, int pid,
+			   bool beacon)
 {
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_vif *vif = info->control.vif;
@@ -922,87 +917,7 @@ mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
 	}
 }
 
-static void
-mt7921_write_hw_txp(struct mt7921_dev *dev, struct mt76_tx_info *tx_info,
-		    void *txp_ptr, u32 id)
-{
-	struct mt7921_hw_txp *txp = txp_ptr;
-	struct mt7921_txp_ptr *ptr = &txp->ptr[0];
-	int i, nbuf = tx_info->nbuf - 1;
-
-	tx_info->buf[0].len = MT_TXD_SIZE + sizeof(*txp);
-	tx_info->nbuf = 1;
-
-	txp->msdu_id[0] = cpu_to_le16(id | MT_MSDU_ID_VALID);
-
-	for (i = 0; i < nbuf; i++) {
-		u16 len = tx_info->buf[i + 1].len & MT_TXD_LEN_MASK;
-		u32 addr = tx_info->buf[i + 1].addr;
-
-		if (i == nbuf - 1)
-			len |= MT_TXD_LEN_LAST;
-
-		if (i & 1) {
-			ptr->buf1 = cpu_to_le32(addr);
-			ptr->len1 = cpu_to_le16(len);
-			ptr++;
-		} else {
-			ptr->buf0 = cpu_to_le32(addr);
-			ptr->len0 = cpu_to_le16(len);
-		}
-	}
-}
-
-int mt7921_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 mt76_txwi_cache *t;
-	struct mt7921_txp_common *txp;
-	int id, pid;
-	u8 *txwi = (u8 *)txwi_ptr;
-
-	if (unlikely(tx_info->skb->len <= ETH_HLEN))
-		return -EINVAL;
-
-	if (!wcid)
-		wcid = &dev->mt76.global_wcid;
-
-	t = (struct mt76_txwi_cache *)(txwi + mdev->drv->txwi_size);
-	t->skb = tx_info->skb;
-
-	id = mt76_token_consume(mdev, &t);
-	if (id < 0)
-		return id;
-
-	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;
-		}
-	}
-
-	pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
-	mt7921_mac_write_txwi(dev, txwi_ptr, tx_info->skb, wcid, key,
-			      pid, false);
-
-	txp = (struct mt7921_txp_common *)(txwi + MT_TXD_SIZE);
-	memset(txp, 0, sizeof(struct mt7921_txp_common));
-	mt7921_write_hw_txp(dev, tx_info, txp, id);
-
-	tx_info->skb = DMA_DUMMY_DATA;
-
-	return 0;
-}
-
-static void
-mt7921_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi)
+void mt7921_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi)
 {
 	struct mt7921_sta *msta;
 	u16 fc, tid;
@@ -1026,141 +941,6 @@ mt7921_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi)
 		ieee80211_start_tx_ba_session(sta, tid, 0);
 }
 
-static void
-mt7921_txp_skb_unmap(struct mt76_dev *dev, struct mt76_txwi_cache *t)
-{
-	struct mt7921_txp_common *txp;
-	int i;
-
-	txp = mt7921_txwi_to_txp(dev, t);
-
-	for (i = 0; i < ARRAY_SIZE(txp->hw.ptr); i++) {
-		struct mt7921_txp_ptr *ptr = &txp->hw.ptr[i];
-		bool last;
-		u16 len;
-
-		len = le16_to_cpu(ptr->len0);
-		last = len & MT_TXD_LEN_LAST;
-		len &= MT_TXD_LEN_MASK;
-		dma_unmap_single(dev->dev, le32_to_cpu(ptr->buf0), len,
-				 DMA_TO_DEVICE);
-		if (last)
-			break;
-
-		len = le16_to_cpu(ptr->len1);
-		last = len & MT_TXD_LEN_LAST;
-		len &= MT_TXD_LEN_MASK;
-		dma_unmap_single(dev->dev, le32_to_cpu(ptr->buf1), len,
-				 DMA_TO_DEVICE);
-		if (last)
-			break;
-	}
-}
-
-static 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;
-
-	mt7921_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 = FIELD_GET(MT_TXD1_WLAN_IDX, le32_to_cpu(txwi[1]));
-	}
-
-	__mt76_tx_complete_skb(mdev, wcid_idx, t->skb, free_list);
-
-out:
-	t->skb = NULL;
-	mt76_put_txwi(mdev, t);
-}
-
-static void
-mt7921_mac_tx_free(struct mt7921_dev *dev, struct sk_buff *skb)
-{
-	struct mt7921_tx_free *free = (struct mt7921_tx_free *)skb->data;
-	struct mt76_dev *mdev = &dev->mt76;
-	struct mt76_txwi_cache *txwi;
-	struct ieee80211_sta *sta = NULL;
-	LIST_HEAD(free_list);
-	struct sk_buff *tmp;
-	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);
-
-	/* TODO: MT_TX_FREE_LATENCY is msdu time from the TXD is queued into PLE,
-	 * to the time ack is received or dropped by hw (air + hw queue time).
-	 * Should avoid accessing WTBL to get Tx airtime, and use it instead.
-	 */
-	count = FIELD_GET(MT_TX_FREE_MSDU_CNT, le16_to_cpu(free->ctrl));
-	for (i = 0; i < count; i++) {
-		u32 msdu, info = le32_to_cpu(free->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);
-
-	napi_consume_skb(skb, 1);
-
-	list_for_each_entry_safe(skb, tmp, &free_list, list) {
-		skb_list_del_init(skb);
-		napi_consume_skb(skb, 1);
-	}
-
-	mt7921_mac_sta_poll(dev);
-	mt76_worker_schedule(&dev->mt76.tx_worker);
-}
-
 static bool
 mt7921_mac_add_txs_skb(struct mt7921_dev *dev, struct mt76_wcid *wcid, int pid,
 		       __le32 *txs_data)
@@ -1328,9 +1108,6 @@ void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 		type = PKT_TYPE_NORMAL_MCU;
 
 	switch (type) {
-	case PKT_TYPE_TXRX_NOTIFY:
-		mt7921_mac_tx_free(dev, skb);
-		break;
 	case PKT_TYPE_RX_EVENT:
 		mt7921_mcu_rx_event(dev, skb);
 		break;
@@ -1352,29 +1129,6 @@ void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
 	}
 }
 
-void mt7921_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
-{
-	if (!e->txwi) {
-		dev_kfree_skb_any(e->skb);
-		return;
-	}
-
-	/* error path */
-	if (e->skb == DMA_DUMMY_DATA) {
-		struct mt76_txwi_cache *t;
-		struct mt7921_txp_common *txp;
-		u16 token;
-
-		txp = mt7921_txwi_to_txp(mdev, e->txwi);
-		token = le16_to_cpu(txp->hw.msdu_id[0]) & ~MT_MSDU_ID_VALID;
-		t = mt76_token_put(mdev, token);
-		e->skb = t ? t->skb : NULL;
-	}
-
-	if (e->skb)
-		mt76_tx_complete_skb(mdev, e->wcid, e->skb);
-}
-
 void mt7921_mac_reset_counters(struct mt7921_phy *phy)
 {
 	struct mt7921_dev *dev = phy->dev;
@@ -1490,20 +1244,6 @@ void mt7921_update_channel(struct mt76_phy *mphy)
 	mt76_connac_power_save_sched(mphy, &dev->pm);
 }
 
-void mt7921_tx_token_put(struct mt7921_dev *dev)
-{
-	struct mt76_txwi_cache *txwi;
-	int id;
-
-	spin_lock_bh(&dev->mt76.token_lock);
-	idr_for_each_entry(&dev->mt76.token, txwi, id) {
-		mt7921_txwi_free(dev, txwi, NULL, false, NULL);
-		dev->mt76.token_count--;
-	}
-	spin_unlock_bh(&dev->mt76.token_lock);
-	idr_destroy(&dev->mt76.token);
-}
-
 static void
 mt7921_vif_connect_iter(void *priv, u8 *mac,
 			struct ieee80211_vif *vif)
@@ -1518,74 +1258,6 @@ mt7921_vif_connect_iter(void *priv, u8 *mac,
 	mt7921_mcu_set_tx(dev, vif);
 }
 
-static int
-mt7921_mac_reset(struct mt7921_dev *dev)
-{
-	int i, err;
-
-	mt76_connac_free_pending_tx_skbs(&dev->pm, NULL);
-
-	mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA, 0);
-	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0);
-
-	set_bit(MT76_RESET, &dev->mphy.state);
-	set_bit(MT76_MCU_RESET, &dev->mphy.state);
-	wake_up(&dev->mt76.mcu.wait);
-	skb_queue_purge(&dev->mt76.mcu.res_q);
-
-	mt76_txq_schedule_all(&dev->mphy);
-
-	mt76_worker_disable(&dev->mt76.tx_worker);
-	napi_disable(&dev->mt76.napi[MT_RXQ_MAIN]);
-	napi_disable(&dev->mt76.napi[MT_RXQ_MCU]);
-	napi_disable(&dev->mt76.napi[MT_RXQ_MCU_WA]);
-	napi_disable(&dev->mt76.tx_napi);
-
-	mt7921_tx_token_put(dev);
-	idr_init(&dev->mt76.token);
-
-	mt7921_wpdma_reset(dev, true);
-
-	local_bh_disable();
-	mt76_for_each_q_rx(&dev->mt76, i) {
-		napi_enable(&dev->mt76.napi[i]);
-		napi_schedule(&dev->mt76.napi[i]);
-	}
-	local_bh_enable();
-
-	clear_bit(MT76_MCU_RESET, &dev->mphy.state);
-
-	mt76_wr(dev, MT_WFDMA0_HOST_INT_ENA,
-		MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_ALL |
-		MT_INT_MCU_CMD);
-	mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
-
-	err = mt7921_run_firmware(dev);
-	if (err)
-		goto out;
-
-	err = mt7921_mcu_set_eeprom(dev);
-	if (err)
-		goto out;
-
-	err = mt7921_mac_init(dev);
-	if (err)
-		goto out;
-
-	err = __mt7921_start(&dev->phy);
-out:
-	clear_bit(MT76_RESET, &dev->mphy.state);
-
-	local_bh_disable();
-	napi_enable(&dev->mt76.tx_napi);
-	napi_schedule(&dev->mt76.tx_napi);
-	local_bh_enable();
-
-	mt76_worker_enable(&dev->mt76.tx_worker);
-
-	return err;
-}
-
 /* system error recovery */
 void mt7921_mac_reset_work(struct work_struct *work)
 {
@@ -1607,7 +1279,7 @@ void mt7921_mac_reset_work(struct work_struct *work)
 	for (i = 0; i < 10; i++) {
 		__mt7921_mcu_drv_pmctrl(dev);
 
-		if (!mt7921_mac_reset(dev))
+		if (!mt7921_dev_reset(dev))
 			break;
 	}
 	mutex_unlock(&dev->mt76.mutex);