net: ethernet: mtk_wed: introduce wed wo support

Introduce WO chip support to mtk wed driver. MTK WED WO is used to
implement RX Wireless Ethernet Dispatch and offload traffic received by
wlan nic to the wired interface.

Tested-by: Daniel Golle <daniel@makrotopia.org>
Co-developed-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: LorenzoBianconi

drivers/net/ethernet/mediatek/Makefile

@@ -5,7 +5,7 @@
 
 obj-$(CONFIG_NET_MEDIATEK_SOC) += mtk_eth.o
 mtk_eth-y := mtk_eth_soc.o mtk_sgmii.o mtk_eth_path.o mtk_ppe.o mtk_ppe_debugfs.o mtk_ppe_offload.o
-mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed.o mtk_wed_mcu.o
+mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed.o mtk_wed_mcu.o mtk_wed_wo.o
 ifdef CONFIG_DEBUG_FS
 mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed_debugfs.o
 endif

drivers/net/ethernet/mediatek/mtk_wed.c

@@ -16,6 +16,7 @@
 #include "mtk_wed_regs.h"
 #include "mtk_wed.h"
 #include "mtk_ppe.h"
+#include "mtk_wed_wo.h"
 
 #define MTK_PCIE_BASE(n)		(0x1a143000 + (n) * 0x2000)
 
@@ -355,6 +356,8 @@ mtk_wed_detach(struct mtk_wed_device *dev)
 
 	mtk_wed_free_buffer(dev);
 	mtk_wed_free_tx_rings(dev);
+	if (hw->version != 1)
+		mtk_wed_wo_deinit(hw);
 
 	if (dev->wlan.bus_type == MTK_WED_BUS_PCIE) {
 		struct device_node *wlan_node;
@@ -878,9 +881,11 @@ mtk_wed_attach(struct mtk_wed_device *dev)
 	}
 
 	mtk_wed_hw_init_early(dev);
-	if (hw->hifsys)
+	if (hw->version == 1)
 		regmap_update_bits(hw->hifsys, HIFSYS_DMA_AG_MAP,
 				   BIT(hw->index), 0);
+	else
+		ret = mtk_wed_wo_init(hw);
 
 out:
 	mutex_unlock(&hw_lock);

drivers/net/ethernet/mediatek/mtk_wed.h

@@ -10,6 +10,7 @@
 #include <linux/netdevice.h>
 
 struct mtk_eth;
+struct mtk_wed_wo;
 
 struct mtk_wed_hw {
 	struct device_node *node;
@@ -22,6 +23,7 @@ struct mtk_wed_hw {
 	struct regmap *mirror;
 	struct dentry *debugfs_dir;
 	struct mtk_wed_device *wed_dev;
+	struct mtk_wed_wo *wed_wo;
 	u32 debugfs_reg;
 	u32 num_flows;
 	u8 version;

drivers/net/ethernet/mediatek/mtk_wed_mcu.c

@@ -122,8 +122,7 @@ mtk_wed_mcu_skb_send_msg(struct mtk_wed_wo *wo, struct sk_buff *skb,
 	if (id == MTK_WED_MODULE_ID_WO)
 		hdr->flag |= cpu_to_le16(MTK_WED_WARP_CMD_FLAG_FROM_TO_WO);
 
-	dev_kfree_skb(skb);
-	return 0;
+	return mtk_wed_wo_queue_tx_skb(wo, &wo->q_tx, skb);
 }
 
 static int