net: ethernet: mtk_wed: introduce WED support for MT7988

Similar to MT7986 and MT7622, enable Wireless Ethernet Ditpatcher for
MT7988 in order to offload traffic forwarded from LAN/WLAN to WLAN/LAN
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/mediatek/mtk_eth_soc.c

@@ -197,6 +197,7 @@ static const struct mtk_reg_map mt7988_reg_map = {
 	.wdma_base = {
 		[0]		= 0x4800,
 		[1]		= 0x4c00,
+		[2]		= 0x5000,
 	},
 	.pse_iq_sta		= 0x0180,
 	.pse_oq_sta		= 0x01a0,

drivers/net/ethernet/mediatek/mtk_eth_soc.h

@@ -1132,7 +1132,7 @@ struct mtk_reg_map {
 	u32	gdm1_cnt;
 	u32	gdma_to_ppe;
 	u32	ppe_base;
-	u32	wdma_base[2];
+	u32	wdma_base[3];
 	u32	pse_iq_sta;
 	u32	pse_oq_sta;
 };

drivers/net/ethernet/mediatek/mtk_ppe_offload.c

@@ -201,6 +201,9 @@ mtk_flow_set_output_device(struct mtk_eth *eth, struct mtk_foe_entry *foe,
 			case 1:
 				pse_port = PSE_WDMA1_PORT;
 				break;
+			case 2:
+				pse_port = PSE_WDMA2_PORT;
+				break;
 			default:
 				return -EINVAL;
 			}

drivers/net/ethernet/mediatek/mtk_wed.h

@@ -9,6 +9,8 @@
 #include <linux/regmap.h>
 #include <linux/netdevice.h>
 
+#include "mtk_wed_regs.h"
+
 struct mtk_eth;
 struct mtk_wed_wo;
 
@@ -19,6 +21,7 @@ struct mtk_wed_soc_data {
 		u32 reset_idx_tx_mask;
 		u32 reset_idx_rx_mask;
 	} regmap;
+	u32 tx_ring_desc_size;
 	u32 wdma_desc_size;
 };
 
@@ -35,6 +38,7 @@ struct mtk_wed_hw {
 	struct dentry *debugfs_dir;
 	struct mtk_wed_device *wed_dev;
 	struct mtk_wed_wo *wed_wo;
+	u32 pcie_base;
 	u32 debugfs_reg;
 	u32 num_flows;
 	u8 version;
@@ -61,6 +65,16 @@ static inline bool mtk_wed_is_v2(struct mtk_wed_hw *hw)
 	return hw->version == 2;
 }
 
+static inline bool mtk_wed_is_v3(struct mtk_wed_hw *hw)
+{
+	return hw->version == 3;
+}
+
+static inline bool mtk_wed_is_v3_or_greater(struct mtk_wed_hw *hw)
+{
+	return hw->version > 2;
+}
+
 static inline void
 wed_w32(struct mtk_wed_device *dev, u32 reg, u32 val)
 {
@@ -143,6 +157,21 @@ wpdma_txfree_w32(struct mtk_wed_device *dev, u32 reg, u32 val)
 	writel(val, dev->txfree_ring.wpdma + reg);
 }
 
+static inline u32 mtk_wed_get_pcie_base(struct mtk_wed_device *dev)
+{
+	if (!mtk_wed_is_v3_or_greater(dev->hw))
+		return MTK_WED_PCIE_BASE;
+
+	switch (dev->hw->index) {
+	case 1:
+		return MTK_WED_PCIE_BASE1;
+	case 2:
+		return MTK_WED_PCIE_BASE2;
+	default:
+		return MTK_WED_PCIE_BASE0;
+	}
+}
+
 void mtk_wed_add_hw(struct device_node *np, struct mtk_eth *eth,
 		    void __iomem *wdma, phys_addr_t wdma_phy,
 		    int index);

drivers/net/ethernet/mediatek/mtk_wed_mcu.c

@@ -331,10 +331,22 @@ mtk_wed_mcu_load_firmware(struct mtk_wed_wo *wo)
 		wo->hw->index + 1);
 
 	/* load firmware */
-	if (of_device_is_compatible(wo->hw->node, "mediatek,mt7981-wed"))
-		fw_name = MT7981_FIRMWARE_WO;
-	else
-		fw_name = wo->hw->index ? MT7986_FIRMWARE_WO1 : MT7986_FIRMWARE_WO0;
+	switch (wo->hw->version) {
+	case 2:
+		if (of_device_is_compatible(wo->hw->node,
+					    "mediatek,mt7981-wed"))
+			fw_name = MT7981_FIRMWARE_WO;
+		else
+			fw_name = wo->hw->index ? MT7986_FIRMWARE_WO1
+						: MT7986_FIRMWARE_WO0;
+		break;
+	case 3:
+		fw_name = wo->hw->index ? MT7988_FIRMWARE_WO1
+					: MT7988_FIRMWARE_WO0;
+		break;
+	default:
+		return -EINVAL;
+	}
 
 	ret = request_firmware(&fw, fw_name, wo->hw->dev);
 	if (ret)
@@ -355,15 +367,16 @@ mtk_wed_mcu_load_firmware(struct mtk_wed_wo *wo)
 	}
 
 	/* set the start address */
-	boot_cr = wo->hw->index ? MTK_WO_MCU_CFG_LS_WA_BOOT_ADDR_ADDR
-				: MTK_WO_MCU_CFG_LS_WM_BOOT_ADDR_ADDR;
+	if (!mtk_wed_is_v3_or_greater(wo->hw) && wo->hw->index)
+		boot_cr = MTK_WO_MCU_CFG_LS_WA_BOOT_ADDR_ADDR;
+	else
+		boot_cr = MTK_WO_MCU_CFG_LS_WM_BOOT_ADDR_ADDR;
 	wo_w32(wo, boot_cr, mem_region[MTK_WED_WO_REGION_EMI].phy_addr >> 16);
 	/* wo firmware reset */
 	wo_w32(wo, MTK_WO_MCU_CFG_LS_WF_MCCR_CLR_ADDR, 0xc00);
 
-	val = wo_r32(wo, MTK_WO_MCU_CFG_LS_WF_MCU_CFG_WM_WA_ADDR);
-	val |= wo->hw->index ? MTK_WO_MCU_CFG_LS_WF_WM_WA_WA_CPU_RSTB_MASK
-			     : MTK_WO_MCU_CFG_LS_WF_WM_WA_WM_CPU_RSTB_MASK;
+	val = wo_r32(wo, MTK_WO_MCU_CFG_LS_WF_MCU_CFG_WM_WA_ADDR) |
+	      MTK_WO_MCU_CFG_LS_WF_WM_WA_WM_CPU_RSTB_MASK;
 	wo_w32(wo, MTK_WO_MCU_CFG_LS_WF_MCU_CFG_WM_WA_ADDR, val);
 out:
 	release_firmware(fw);
@@ -398,3 +411,5 @@ int mtk_wed_mcu_init(struct mtk_wed_wo *wo)
 MODULE_FIRMWARE(MT7981_FIRMWARE_WO);
 MODULE_FIRMWARE(MT7986_FIRMWARE_WO0);
 MODULE_FIRMWARE(MT7986_FIRMWARE_WO1);
+MODULE_FIRMWARE(MT7988_FIRMWARE_WO0);
+MODULE_FIRMWARE(MT7988_FIRMWARE_WO1);

drivers/net/ethernet/mediatek/mtk_wed_wo.h

@@ -91,6 +91,8 @@ enum mtk_wed_dummy_cr_idx {
 #define MT7981_FIRMWARE_WO	"mediatek/mt7981_wo.bin"
 #define MT7986_FIRMWARE_WO0	"mediatek/mt7986_wo_0.bin"
 #define MT7986_FIRMWARE_WO1	"mediatek/mt7986_wo_1.bin"
+#define MT7988_FIRMWARE_WO0	"mediatek/mt7988_wo_0.bin"
+#define MT7988_FIRMWARE_WO1	"mediatek/mt7988_wo_1.bin"
 
 #define MTK_WO_MCU_CFG_LS_BASE				0
 #define MTK_WO_MCU_CFG_LS_HW_VER_ADDR			(MTK_WO_MCU_CFG_LS_BASE + 0x000)

include/linux/soc/mediatek/mtk_wed.h

@@ -138,6 +138,8 @@ struct mtk_wed_device {
 		u32 wpdma_rx;
 
 		bool wcid_512;
+		bool hw_rro;
+		bool msi;
 
 		u16 token_start;
 		unsigned int nbuf;
@@ -211,10 +213,12 @@ mtk_wed_device_attach(struct mtk_wed_device *dev)
 	return ret;
 }
 
-static inline bool
-mtk_wed_get_rx_capa(struct mtk_wed_device *dev)
+static inline bool mtk_wed_get_rx_capa(struct mtk_wed_device *dev)
 {
 #ifdef CONFIG_NET_MEDIATEK_SOC_WED
+	if (dev->version == 3)
+		return dev->wlan.hw_rro;
+
 	return dev->version != 1;
 #else
 	return false;