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From:   <sean.wang@mediatek.com>
To:     <nbd@nbd.name>, <lorenzo.bianconi@redhat.com>
CC:     <sean.wang@mediatek.com>, <Soul.Huang@mediatek.com>,
        <YN.Chen@mediatek.com>, <Leon.Yen@mediatek.com>,
        <Eric-SY.Chang@mediatek.com>, <Deren.Wu@mediatek.com>,
        <km.lin@mediatek.com>, <robin.chiu@mediatek.com>,
        <Eddie.Chen@mediatek.com>, <ch.yeh@mediatek.com>,
        <posh.sun@mediatek.com>, <ted.huang@mediatek.com>,
        <Eric.Liang@mediatek.com>, <Stella.Chang@mediatek.com>,
        <steve.lee@mediatek.com>, <jemele@google.com>,
        <shawnku@google.com>, <linux-wireless@vger.kernel.org>,
        <linux-mediatek@lists.infradead.org>
Subject: [PATCH v1 01/16] mt76: mt7921: refactor mac.c to be bus independent
Date:   Wed, 15 Sep 2021 09:14:34 +0800
Message-ID: <f0d66c706432282ca97156f2d0c514d7c260ec09.1631667941.git.objelf@gmail.com>
In-Reply-To: <cover.1631667941.git.objelf@gmail.com>
References: <cover.1631667941.git.objelf@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

From: Sean Wang <sean.wang@mediatek.com>

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>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
 .../wireless/mediatek/mt76/mt7921/Makefile    |   2 +-
 .../net/wireless/mediatek/mt76/mt7921/mac.c   | 331 +----------------
 .../wireless/mediatek/mt76/mt7921/mt7921.h    |  25 +-
 .../net/wireless/mediatek/mt76/mt7921/pci.c   |  12 +-
 .../wireless/mediatek/mt76/mt7921/pci_mac.c   | 345 ++++++++++++++++++
 5 files changed, 379 insertions(+), 336 deletions(-)
 create mode 100644 drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/Makefile b/drivers/net/wireless/mediatek/mt76/mt7921/Makefile
index 3471d82fc265..554202358470 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/Makefile
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/Makefile
@@ -4,5 +4,5 @@ obj-$(CONFIG_MT7921E) += mt7921e.o
 
 CFLAGS_trace.o := -I$(src)
 
-mt7921e-y := pci.o mac.o mcu.o dma.o eeprom.o main.o init.o debugfs.o trace.o
+mt7921e-y := pci.o pci_mac.o mac.o mcu.o dma.o eeprom.o main.o init.o debugfs.o trace.o
 mt7921e-$(CONFIG_NL80211_TESTMODE) += testmode.o
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index 27f13228c5a7..d811702a3a2c 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,
@@ -836,7 +836,7 @@ mt7921_mac_write_txwi_80211(struct mt7921_dev *dev, __le32 *txwi,
 	txwi[7] |= cpu_to_le32(val);
 }
 
-static void
+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,
@@ -922,86 +922,7 @@ 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
+void
 mt7921_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi)
 {
 	struct mt7921_sta *msta;
@@ -1026,143 +947,6 @@ 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 mt7921_phy *phy;
-			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);
-			phy = msta->vif->phy;
-			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)
@@ -1330,9 +1114,6 @@ 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;
@@ -1354,33 +1135,6 @@ 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)
-{
-	struct mt7921_dev *dev;
-
-	if (!e->txwi) {
-		dev_kfree_skb_any(e->skb);
-		return;
-	}
-
-	dev = container_of(mdev, struct mt7921_dev, mt76);
-
-	/* 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;
@@ -1496,20 +1250,6 @@ 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)
@@ -1524,69 +1264,6 @@ 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);
-
-	mt76_for_each_q_rx(&dev->mt76, i) {
-		napi_enable(&dev->mt76.napi[i]);
-		napi_schedule(&dev->mt76.napi[i]);
-	}
-
-	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);
-
-	napi_enable(&dev->mt76.tx_napi);
-	napi_schedule(&dev->mt76.tx_napi);
-	mt76_worker_enable(&dev->mt76.tx_worker);
-
-	return err;
-}
-
 /* system error recovery */
 void mt7921_mac_reset_work(struct work_struct *work)
 {
@@ -1608,7 +1285,7 @@ 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);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
index e14b86b1c6d1..70c0f41180a1 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -133,6 +133,11 @@ struct mt7921_phy {
 	struct delayed_work scan_work;
 };
 
+#define mt7921_dev_reset(dev)	((dev)->hif_ops->reset(dev))
+struct mt7921_hif_ops {
+	int (*reset)(struct mt7921_dev *dev);
+};
+
 struct mt7921_dev {
 	union { /* must be first */
 		struct mt76_dev mt76;
@@ -156,6 +161,7 @@ struct mt7921_dev {
 
 	struct mt76_connac_pm pm;
 	struct mt76_connac_coredump coredump;
+	const struct mt7921_hif_ops *hif_ops;
 };
 
 enum {
@@ -325,13 +331,13 @@ void mt7921_mac_reset_work(struct work_struct *work);
 void mt7921_mac_update_mib_stats(struct mt7921_phy *phy);
 void mt7921_reset(struct mt76_dev *mdev);
 void mt7921_tx_cleanup(struct mt7921_dev *dev);
-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);
+int mt7921e_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);
 
 void mt7921_tx_worker(struct mt76_worker *w);
-void mt7921_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e);
+void mt7921e_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e);
 int mt7921_init_tx_queues(struct mt7921_phy *phy, int idx, int n_desc);
 void mt7921_tx_token_put(struct mt7921_dev *dev);
 void mt7921_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
@@ -366,4 +372,13 @@ int mt7921_testmode_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			void *data, int len);
 int mt7921_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *msg,
 			 struct netlink_callback *cb, void *data, int len);
+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_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi);
+void mt7921_mac_sta_poll(struct mt7921_dev *dev);
+void mt7921e_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
+			  struct sk_buff *skb);
+int mt7921e_mac_reset(struct mt7921_dev *dev);
 #endif
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
index cd710360d180..b01b9b7c42b4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -104,9 +104,9 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
 				SURVEY_INFO_TIME_RX |
 				SURVEY_INFO_TIME_BSS_RX,
 		.token_size = MT7921_TOKEN_SIZE,
-		.tx_prepare_skb = mt7921_tx_prepare_skb,
-		.tx_complete_skb = mt7921_tx_complete_skb,
-		.rx_skb = mt7921_queue_rx_skb,
+		.tx_prepare_skb = mt7921e_tx_prepare_skb,
+		.tx_complete_skb = mt7921e_tx_complete_skb,
+		.rx_skb = mt7921e_queue_rx_skb,
 		.rx_poll_complete = mt7921_rx_poll_complete,
 		.sta_ps = mt7921_sta_ps,
 		.sta_add = mt7921_mac_sta_add,
@@ -114,6 +114,11 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
 		.sta_remove = mt7921_mac_sta_remove,
 		.update_survey = mt7921_update_channel,
 	};
+
+	static const struct mt7921_hif_ops mt7921_pcie_ops = {
+		.reset = mt7921e_mac_reset,
+	};
+
 	struct mt7921_dev *dev;
 	struct mt76_dev *mdev;
 	int ret;
@@ -147,6 +152,7 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
 	}
 
 	dev = container_of(mdev, struct mt7921_dev, mt76);
+	dev->hif_ops = &mt7921_pcie_ops;
 
 	mt76_mmio_init(&dev->mt76, pcim_iomap_table(pdev)[0]);
 	tasklet_init(&dev->irq_tasklet, mt7921_irq_tasklet, (unsigned long)dev);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c
new file mode 100644
index 000000000000..f211dafa311c
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c
@@ -0,0 +1,345 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2021 MediaTek Inc. */
+
+#include "mt7921.h"
+#include "../dma.h"
+#include "mac.h"
+
+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 mt7921e_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_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 mt7921_phy *phy;
+			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);
+			phy = msta->vif->phy;
+			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);
+}
+
+void mt7921e_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;
+	enum rx_pkt_type type;
+
+	type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0]));
+
+	switch (type) {
+	case PKT_TYPE_TXRX_NOTIFY:
+		mt7921_mac_tx_free(dev, skb);
+		break;
+	default:
+		mt7921_queue_rx_skb(mdev, q, skb);
+		break;
+	}
+}
+
+void mt7921e_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
+{
+	struct mt7921_dev *dev;
+
+	if (!e->txwi) {
+		dev_kfree_skb_any(e->skb);
+		return;
+	}
+
+	dev = container_of(mdev, struct mt7921_dev, mt76);
+
+	/* 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_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);
+}
+
+int
+mt7921e_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);
+
+	mt76_for_each_q_rx(&dev->mt76, i) {
+		napi_enable(&dev->mt76.napi[i]);
+		napi_schedule(&dev->mt76.napi[i]);
+	}
+
+	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);
+
+	napi_enable(&dev->mt76.tx_napi);
+	napi_schedule(&dev->mt76.tx_napi);
+	mt76_worker_enable(&dev->mt76.tx_worker);
+
+	return err;
+}
-- 
2.25.1