mt76: mt7921: introduce mt7921s support

moore-bros · nbd168 · commit 48fab5bbef40 · 2021-10-20T10:37:00.000+02:00
Introduce support for mt7921s 802.11ax (Wi-Fi 6) 2x2:2SS chipset.

Tested-by: Deren Wu &lt;deren.wu@mediatek.com&gt;
Co-developed-by: Lorenzo Bianconi &lt;lorenzo@kernel.org&gt;
Signed-off-by: Lorenzo Bianconi &lt;lorenzo@kernel.org&gt;
Signed-off-by: Sean Wang &lt;sean.wang@mediatek.com&gt;
Signed-off-by: Felix Fietkau &lt;nbd@nbd.name&gt;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/Kconfig b/drivers/net/wireless/mediatek/mt76/mt7921/Kconfig
@@ -13,3 +13,13 @@ config MT7921E
 	  This adds support for MT7921E 802.11ax 2x2:2SS wireless devices.
 
 	  To compile this driver as a module, choose M here.
+
+config MT7921S
+	tristate "MediaTek MT7921S (SDIO) support"
+	select MT76_SDIO
+	select MT7921_COMMON
+	depends on MAC80211
+	help
+	  This adds support for MT7921S 802.11ax 2x2:2SS wireless devices.
+
+	  To compile this driver as a module, choose M here.
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/Makefile b/drivers/net/wireless/mediatek/mt76/mt7921/Makefile
@@ -2,9 +2,11 @@
 
 obj-$(CONFIG_MT7921_COMMON) += mt7921-common.o
 obj-$(CONFIG_MT7921E) += mt7921e.o
+obj-$(CONFIG_MT7921S) += mt7921s.o
 
 CFLAGS_trace.o := -I$(src)
 
 mt7921-common-y := mac.o mcu.o main.o init.o debugfs.o trace.o
 mt7921-common-$(CONFIG_NL80211_TESTMODE) += testmode.o
 mt7921e-y := pci.o pci_mac.o pci_mcu.o dma.o
+mt7921s-y := sdio.o sdio_mac.o sdio_mcu.o
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7921/debugfs.c
@@ -413,6 +413,20 @@ static int mt7921_chip_reset(void *data, u64 val)
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_reset, NULL, mt7921_chip_reset, "%lld\n");
 
+static int
+mt7921s_sched_quota_read(struct seq_file *s, void *data)
+{
+	struct mt7921_dev *dev = dev_get_drvdata(s->private);
+	struct mt76_sdio *sdio = &dev->mt76.sdio;
+
+	seq_printf(s, "pse_data_quota\t%d\n", sdio->sched.pse_data_quota);
+	seq_printf(s, "ple_data_quota\t%d\n", sdio->sched.ple_data_quota);
+	seq_printf(s, "pse_mcu_quota\t%d\n", sdio->sched.pse_mcu_quota);
+	seq_printf(s, "sched_deficit\t%d\n", sdio->sched.deficit);
+
+	return 0;
+}
+
 int mt7921_init_debugfs(struct mt7921_dev *dev)
 {
 	struct dentry *dir;
@@ -436,6 +450,8 @@ int mt7921_init_debugfs(struct mt7921_dev *dev)
 	debugfs_create_devm_seqfile(dev->mt76.dev, "runtime_pm_stats", dir,
 				    mt7921_pm_stats);
 	debugfs_create_file("deep-sleep", 0600, dir, dev, &fops_ds);
-
+	if (mt76_is_sdio(&dev->mt76))
+		debugfs_create_devm_seqfile(dev->mt76.dev, "sched-quota", dir,
+					    mt7921s_sched_quota_read);
 	return 0;
 }
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/init.c b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
@@ -231,8 +231,15 @@ int mt7921_register_device(struct mt7921_dev *dev)
 	dev->pm.idle_timeout = MT7921_PM_TIMEOUT;
 	dev->pm.stats.last_wake_event = jiffies;
 	dev->pm.stats.last_doze_event = jiffies;
-	dev->pm.enable = true;
-	dev->pm.ds_enable = true;
+
+	/* TODO: mt7921s run sleep mode on default  */
+	if (mt76_is_mmio(&dev->mt76)) {
+		dev->pm.enable = true;
+		dev->pm.ds_enable = true;
+	}
+
+	if (mt76_is_sdio(&dev->mt76))
+		hw->extra_tx_headroom += MT_SDIO_TXD_SIZE + MT_SDIO_HDR_SIZE;
 
 	ret = mt7921_init_hardware(dev);
 	if (ret)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -843,6 +843,8 @@ void mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
 	struct ieee80211_vif *vif = info->control.vif;
 	struct mt76_phy *mphy = &dev->mphy;
 	u8 p_fmt, q_idx, omac_idx = 0, wmm_idx = 0;
+	bool is_mmio = mt76_is_mmio(&dev->mt76);
+	u32 sz_txd = is_mmio ? MT_TXD_SIZE : MT_SDIO_TXD_SIZE;
 	bool is_8023 = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
 	u16 tx_count = 15;
 	u32 val;
@@ -858,15 +860,15 @@ void mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
 		p_fmt = MT_TX_TYPE_FW;
 		q_idx = MT_LMAC_BCN0;
 	} else if (skb_get_queue_mapping(skb) >= MT_TXQ_PSD) {
-		p_fmt = MT_TX_TYPE_CT;
+		p_fmt = is_mmio ? MT_TX_TYPE_CT : MT_TX_TYPE_SF;
 		q_idx = MT_LMAC_ALTX0;
 	} else {
-		p_fmt = MT_TX_TYPE_CT;
+		p_fmt = is_mmio ? MT_TX_TYPE_CT : MT_TX_TYPE_SF;
 		q_idx = wmm_idx * MT7921_MAX_WMM_SETS +
 			mt7921_lmac_mapping(dev, skb_get_queue_mapping(skb));
 	}
 
-	val = FIELD_PREP(MT_TXD0_TX_BYTES, skb->len + MT_TXD_SIZE) |
+	val = FIELD_PREP(MT_TXD0_TX_BYTES, skb->len + sz_txd) |
 	      FIELD_PREP(MT_TXD0_PKT_FMT, p_fmt) |
 	      FIELD_PREP(MT_TXD0_Q_IDX, q_idx);
 	txwi[0] = cpu_to_le32(val);
@@ -1384,12 +1386,18 @@ void mt7921_pm_wake_work(struct work_struct *work)
 	mphy = dev->phy.mt76;
 
 	if (!mt7921_mcu_drv_pmctrl(dev)) {
+		struct mt76_dev *mdev = &dev->mt76;
 		int i;
 
-		mt76_for_each_q_rx(&dev->mt76, i)
-			napi_schedule(&dev->mt76.napi[i]);
-		mt76_connac_pm_dequeue_skbs(mphy, &dev->pm);
-		mt7921_mcu_tx_cleanup(dev);
+		if (mt76_is_sdio(mdev)) {
+			mt76_connac_pm_dequeue_skbs(mphy, &dev->pm);
+			mt76_worker_schedule(&mdev->sdio.txrx_worker);
+		} else {
+			mt76_for_each_q_rx(mdev, i)
+				napi_schedule(&mdev->napi[i]);
+			mt76_connac_pm_dequeue_skbs(mphy, &dev->pm);
+			mt7921_mcu_tx_cleanup(dev);
+		}
 		if (test_bit(MT76_STATE_RUNNING, &mphy->state))
 			ieee80211_queue_delayed_work(mphy->hw, &mphy->mac_work,
 						     MT7921_WATCHDOG_TIME);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.h b/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
@@ -199,6 +199,10 @@ enum tx_mcu_port_q_idx {
 
 #define MT_TXD_SIZE			(8 * 4)
 
+#define MT_SDIO_TXD_SIZE		(MT_TXD_SIZE + 8 * 4)
+#define MT_SDIO_TAIL_SIZE		8
+#define MT_SDIO_HDR_SIZE		4
+
 #define MT_TXD0_Q_IDX			GENMASK(31, 25)
 #define MT_TXD0_PKT_FMT			GENMASK(24, 23)
 #define MT_TXD0_ETH_TYPE_OFFSET		GENMASK(22, 16)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -650,7 +650,9 @@ static int mt7921_load_patch(struct mt7921_dev *dev)
 {
 	const struct mt7921_patch_hdr *hdr;
 	const struct firmware *fw = NULL;
-	int i, ret, sem;
+	int i, ret, sem, max_len;
+
+	max_len = mt76_is_sdio(&dev->mt76) ? 2048 : 4096;
 
 	sem = mt76_connac_mcu_patch_sem_ctrl(&dev->mt76, true);
 	switch (sem) {
@@ -706,7 +708,7 @@ static int mt7921_load_patch(struct mt7921_dev *dev)
 		}
 
 		ret = __mt76_mcu_send_firmware(&dev->mt76, MCU_CMD_FW_SCATTER,
-					       dl, len, 4096);
+					       dl, len, max_len);
 		if (ret) {
 			dev_err(dev->mt76.dev, "Failed to send patch\n");
 			goto out;
@@ -753,9 +755,11 @@ mt7921_mcu_send_ram_firmware(struct mt7921_dev *dev,
 			     const struct mt7921_fw_trailer *hdr,
 			     const u8 *data, bool is_wa)
 {
-	int i, offset = 0;
+	int i, offset = 0, max_len;
 	u32 override = 0, option = 0;
 
+	max_len = mt76_is_sdio(&dev->mt76) ? 2048 : 4096;
+
 	for (i = 0; i < hdr->n_region; i++) {
 		const struct mt7921_fw_region *region;
 		int err;
@@ -778,7 +782,7 @@ mt7921_mcu_send_ram_firmware(struct mt7921_dev *dev,
 		}
 
 		err = __mt76_mcu_send_firmware(&dev->mt76, MCU_CMD_FW_SCATTER,
-					       data + offset, len, 4096);
+					       data + offset, len, max_len);
 		if (err) {
 			dev_err(dev->mt76.dev, "Failed to send firmware.\n");
 			return err;
@@ -851,7 +855,7 @@ static int mt7921_load_firmware(struct mt7921_dev *dev)
 	int ret;
 
 	ret = mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY);
-	if (ret) {
+	if (ret && mt76_is_mmio(&dev->mt76)) {
 		dev_dbg(dev->mt76.dev, "Firmware is already download\n");
 		goto fw_loaded;
 	}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -47,6 +47,29 @@
 #define MT7921_SKU_MAX_DELTA_IDX	MT7921_SKU_RATE_NUM
 #define MT7921_SKU_TABLE_SIZE		(MT7921_SKU_RATE_NUM + 1)
 
+#define MT7921_SDIO_HDR_TX_BYTES	GENMASK(15, 0)
+#define MT7921_SDIO_HDR_PKT_TYPE	GENMASK(17, 16)
+
+enum mt7921_sdio_pkt_type {
+	MT7921_SDIO_TXD,
+	MT7921_SDIO_DATA,
+	MT7921_SDIO_CMD,
+	MT7921_SDIO_FWDL,
+};
+
+struct mt7921_sdio_intr {
+	u32 isr;
+	struct {
+		u32 wtqcr[16];
+	} tx;
+	struct {
+		u16 num[2];
+		u16 len0[16];
+		u16 len1[128];
+	} rx;
+	u32 rec_mb[2];
+} __packed;
+
 #define to_rssi(field, rxv)		((FIELD_GET(field, rxv) - 220) / 2)
 #define to_rcpi(rssi)			(2 * (rssi) + 220)
 
@@ -321,6 +344,17 @@ static inline void mt7921_mcu_tx_cleanup(struct mt7921_dev *dev)
 	mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WA], false);
 }
 
+static inline void mt7921_skb_add_sdio_hdr(struct sk_buff *skb,
+					   enum mt7921_sdio_pkt_type type)
+{
+	u32 hdr;
+
+	hdr = FIELD_PREP(MT7921_SDIO_HDR_TX_BYTES, skb->len + sizeof(hdr)) |
+	      FIELD_PREP(MT7921_SDIO_HDR_PKT_TYPE, type);
+
+	put_unaligned_le32(hdr, skb_push(skb, sizeof(hdr)));
+}
+
 int mt7921_mac_init(struct mt7921_dev *dev);
 bool mt7921_mac_wtbl_update(struct mt7921_dev *dev, int idx, u32 mask);
 void mt7921_mac_reset_counters(struct mt7921_phy *phy);
@@ -394,4 +428,13 @@ int mt7921e_mcu_init(struct mt7921_dev *dev);
 int mt7921e_mcu_drv_pmctrl(struct mt7921_dev *dev);
 int mt7921e_mcu_fw_pmctrl(struct mt7921_dev *dev);
 
+int mt7921s_mcu_init(struct mt7921_dev *dev);
+int mt7921s_mcu_drv_pmctrl(struct mt7921_dev *dev);
+int mt7921s_mcu_fw_pmctrl(struct mt7921_dev *dev);
+int mt7921s_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 mt7921s_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e);
+bool mt7921s_tx_status_data(struct mt76_dev *mdev, u8 *update);
 #endif
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c b/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/sdio_mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/sdio_mac.c
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/sdio_mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/sdio_mcu.c
