mt76: introduce mt76_sdio module

Introduce mt76_sdio module as common layer to add mt7663s support

Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

Author: moore-bros

drivers/net/wireless/mediatek/mt76/Kconfig

@@ -12,6 +12,10 @@ config MT76_USB
 	tristate
 	depends on MT76_CORE
 
+config MT76_SDIO
+	tristate
+	depends on MT76_CORE
+
 config MT76x02_LIB
 	tristate
 	select MT76_CORE

drivers/net/wireless/mediatek/mt76/Makefile

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_MT76_CORE) += mt76.o
 obj-$(CONFIG_MT76_USB) += mt76-usb.o
+obj-$(CONFIG_MT76_SDIO) += mt76-sdio.o
 obj-$(CONFIG_MT76x02_LIB) += mt76x02-lib.o
 obj-$(CONFIG_MT76x02_USB) += mt76x02-usb.o
 
@@ -12,6 +13,7 @@ mt76-$(CONFIG_PCI) += pci.o
 mt76-$(CONFIG_NL80211_TESTMODE) += testmode.o
 
 mt76-usb-y := usb.o usb_trace.o
+mt76-sdio-y := sdio.o
 
 CFLAGS_trace.o := -I$(src)
 CFLAGS_usb_trace.o := -I$(src)

drivers/net/wireless/mediatek/mt76/mac80211.c

@@ -305,7 +305,11 @@ mt76_phy_init(struct mt76_dev *dev, struct ieee80211_hw *hw)
 	ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
 	ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
 	ieee80211_hw_set(hw, TX_AMSDU);
-	ieee80211_hw_set(hw, TX_FRAG_LIST);
+
+	/* TODO: avoid linearization for SDIO */
+	if (!mt76_is_sdio(dev))
+		ieee80211_hw_set(hw, TX_FRAG_LIST);
+
 	ieee80211_hw_set(hw, MFP_CAPABLE);
 	ieee80211_hw_set(hw, AP_LINK_PS);
 	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -34,6 +34,7 @@ struct mt76_reg_pair {
 enum mt76_bus_type {
 	MT76_BUS_MMIO,
 	MT76_BUS_USB,
+	MT76_BUS_SDIO,
 };
 
 struct mt76_bus_ops {
@@ -53,6 +54,7 @@ struct mt76_bus_ops {
 
 #define mt76_is_usb(dev) ((dev)->bus->type == MT76_BUS_USB)
 #define mt76_is_mmio(dev) ((dev)->bus->type == MT76_BUS_MMIO)
+#define mt76_is_sdio(dev) ((dev)->bus->type == MT76_BUS_SDIO)
 
 enum mt76_txq_id {
 	MT_TXQ_VO = IEEE80211_AC_VO,
@@ -95,6 +97,7 @@ struct mt76_queue_entry {
 	union {
 		struct mt76_txwi_cache *txwi;
 		struct urb *urb;
+		int buf_sz;
 	};
 	enum mt76_txq_id qid;
 	bool skip_buf0:1;
@@ -147,6 +150,8 @@ struct mt76_mcu_ops {
 			    int len, bool wait_resp);
 	int (*mcu_skb_send_msg)(struct mt76_dev *dev, struct sk_buff *skb,
 				int cmd, bool wait_resp);
+	u32 (*mcu_rr)(struct mt76_dev *dev, u32 offset);
+	void (*mcu_wr)(struct mt76_dev *dev, u32 offset, u32 val);
 	int (*mcu_wr_rp)(struct mt76_dev *dev, u32 base,
 			 const struct mt76_reg_pair *rp, int len);
 	int (*mcu_rd_rp)(struct mt76_dev *dev, u32 base,
@@ -440,6 +445,24 @@ struct mt76_usb {
 	} mcu;
 };
 
+struct mt76_sdio {
+	struct task_struct *tx_kthread;
+	struct task_struct *kthread;
+	struct work_struct stat_work;
+
+	unsigned long state;
+
+	struct sdio_func *func;
+
+	struct {
+		struct mutex lock;
+		int pse_data_quota;
+		int ple_data_quota;
+		int pse_mcu_quota;
+		int deficit;
+	} sched;
+};
+
 struct mt76_mmio {
 	void __iomem *regs;
 	spinlock_t irq_lock;
@@ -626,6 +649,7 @@ struct mt76_dev {
 	union {
 		struct mt76_mmio mmio;
 		struct mt76_usb usb;
+		struct mt76_sdio sdio;
 	};
 };
 
@@ -1030,6 +1054,12 @@ void mt76u_stop_rx(struct mt76_dev *dev);
 int mt76u_resume_rx(struct mt76_dev *dev);
 void mt76u_queues_deinit(struct mt76_dev *dev);
 
+int mt76s_init(struct mt76_dev *dev, struct sdio_func *func,
+	       const struct mt76_bus_ops *bus_ops);
+int mt76s_alloc_queues(struct mt76_dev *dev);
+void mt76s_stop_txrx(struct mt76_dev *dev);
+void mt76s_deinit(struct mt76_dev *dev);
+
 struct sk_buff *
 mt76_mcu_msg_alloc(struct mt76_dev *dev, const void *data,
 		   int data_len);

drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c

@@ -359,7 +359,10 @@ int mt7663_usb_sdio_register_device(struct mt7615_dev *dev)
 		return err;
 
 	/* check hw sg support in order to enable AMSDU */
-	hw->max_tx_fragments = dev->mt76.usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;
+	if (dev->mt76.usb.sg_en || mt76_is_sdio(&dev->mt76))
+		hw->max_tx_fragments = MT_HW_TXP_MAX_BUF_NUM;
+	else
+		hw->max_tx_fragments = 1;
 	hw->extra_tx_headroom += MT_USB_TXD_SIZE;
 	if (mt76_is_usb(&dev->mt76))
 		hw->extra_tx_headroom += MT_USB_HDR_SIZE;