Merge branch 'introduce-flowtable-hw-offloading-in-airoha_eth-driver'

Lorenzo Bianconi says:

====================
Introduce flowtable hw offloading in airoha_eth driver

Introduce netfilter flowtable integration in airoha_eth driver to
offload 5-tuple flower rules learned by the PPE module if the user
accelerates them using a nft configuration similar to the one reported
below:

table inet filter {
	flowtable ft {
		hook ingress priority filter
		devices = { lan1, lan2, lan3, lan4, eth1 }
		flags offload;
	}
	chain forward {
		type filter hook forward priority filter; policy accept;
		meta l4proto { tcp, udp } flow add @ft
	}
}

Packet Processor Engine (PPE) module available on EN7581 SoC populates
the PPE table with 5-tuples flower rules learned from traffic forwarded
between the GDM ports connected to the Packet Switch Engine (PSE) module.
airoha_eth driver configures and collects data from the PPE module via a
Network Processor Unit (NPU) RISC-V module available on the EN7581 SoC.
Move airoha_eth driver in a dedicated folder
(drivers/net/ethernet/airoha).

v7: https://lore.kernel.org/r/20250224-airoha-en7581-flowtable-offload-v7-0-b4a22ad8364e@kernel.org
v6: https://lore.kernel.org/r/20250221-airoha-en7581-flowtable-offload-v6-0-d593af0e9487@kernel.org
v5: https://lore.kernel.org/r/20250217-airoha-en7581-flowtable-offload-v5-0-28be901cb735@kernel.org
v4: https://lore.kernel.org/r/20250213-airoha-en7581-flowtable-offload-v4-0-b69ca16d74db@kernel.org
v3: https://lore.kernel.org/r/20250209-airoha-en7581-flowtable-offload-v3-0-dba60e755563@kernel.org
v2: https://lore.kernel.org/r/20250207-airoha-en7581-flowtable-offload-v2-0-3a2239692a67@kernel.org
v1: https://lore.kernel.org/r/20250205-airoha-en7581-flowtable-offload-v1-0-d362cfa97b01@kernel.org
====================

Link: https://patch.msgid.link/20250228-airoha-en7581-flowtable-offload-v8-0-01dc1653f46e@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Documentation/devicetree/bindings/net/airoha,en7581-eth.yaml

@@ -63,6 +63,14 @@ properties:
   "#size-cells":
     const: 0
 
+  airoha,npu:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the node used to configure the NPU module.
+      The Airoha Network Processor Unit (NPU) provides a configuration
+      interface to implement hardware flow offloading programming Packet
+      Processor Engine (PPE) flow table.
+
 patternProperties:
   "^ethernet@[1-4]$":
     type: object
@@ -132,6 +140,8 @@ examples:
                      <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>,
                      <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
 
+        airoha,npu = <&npu>;
+
         #address-cells = <1>;
         #size-cells = <0>;
 

Documentation/devicetree/bindings/net/airoha,en7581-npu.yaml

@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/airoha,en7581-npu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha Network Processor Unit for EN7581 SoC
+
+maintainers:
+  - Lorenzo Bianconi <lorenzo@kernel.org>
+
+description:
+  The Airoha Network Processor Unit (NPU) provides a configuration interface
+  to implement wired and wireless hardware flow offloading programming Packet
+  Processor Engine (PPE) flow table.
+
+properties:
+  compatible:
+    enum:
+      - airoha,en7581-npu
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: mbox host irq line
+      - description: watchdog0 irq line
+      - description: watchdog1 irq line
+      - description: watchdog2 irq line
+      - description: watchdog3 irq line
+      - description: watchdog4 irq line
+      - description: watchdog5 irq line
+      - description: watchdog6 irq line
+      - description: watchdog7 irq line
+      - description: wlan irq line0
+      - description: wlan irq line1
+      - description: wlan irq line2
+      - description: wlan irq line3
+      - description: wlan irq line4
+      - description: wlan irq line5
+
+  memory-region:
+    maxItems: 1
+    description:
+      Memory used to store NPU firmware binary.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - memory-region
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      npu@1e900000 {
+        compatible = "airoha,en7581-npu";
+        reg = <0 0x1e900000 0 0x313000>;
+        interrupts = <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 134 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 135 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
+        memory-region = <&npu_binary>;
+      };
+    };

drivers/net/dsa/mt7530.c

@@ -2586,6 +2586,11 @@ mt7531_setup_common(struct dsa_switch *ds)
 	/* Allow mirroring frames received on the local port (monitor port). */
 	mt7530_set(priv, MT753X_AGC, LOCAL_EN);
 
+	/* Enable Special Tag for rx frames */
+	if (priv->id == ID_EN7581)
+		mt7530_write(priv, MT753X_CPORT_SPTAG_CFG,
+			     CPORT_SW2FE_STAG_EN | CPORT_FE2SW_STAG_EN);
+
 	/* Flush the FDB table */
 	ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL);
 	if (ret < 0)

drivers/net/dsa/mt7530.h

@@ -627,6 +627,10 @@ enum mt7531_xtal_fsel {
 #define  MT7531_GPIO12_RG_RXD3_MASK	GENMASK(19, 16)
 #define  MT7531_EXT_P_MDIO_12		(2 << 16)
 
+#define MT753X_CPORT_SPTAG_CFG		0x7c10
+#define  CPORT_SW2FE_STAG_EN		BIT(1)
+#define  CPORT_FE2SW_STAG_EN		BIT(0)
+
 /* Registers for LED GPIO control (MT7530 only)
  * All registers follow this pattern:
  * [ 2: 0]  port 0

drivers/net/ethernet/Kconfig

@@ -20,6 +20,8 @@ source "drivers/net/ethernet/actions/Kconfig"
 source "drivers/net/ethernet/adaptec/Kconfig"
 source "drivers/net/ethernet/aeroflex/Kconfig"
 source "drivers/net/ethernet/agere/Kconfig"
+source "drivers/net/ethernet/airoha/Kconfig"
+source "drivers/net/ethernet/mellanox/Kconfig"
 source "drivers/net/ethernet/alacritech/Kconfig"
 source "drivers/net/ethernet/allwinner/Kconfig"
 source "drivers/net/ethernet/alteon/Kconfig"

drivers/net/ethernet/Makefile

@@ -10,6 +10,7 @@ obj-$(CONFIG_NET_VENDOR_ADAPTEC) += adaptec/
 obj-$(CONFIG_GRETH) += aeroflex/
 obj-$(CONFIG_NET_VENDOR_ADI) += adi/
 obj-$(CONFIG_NET_VENDOR_AGERE) += agere/
+obj-$(CONFIG_NET_VENDOR_AIROHA) += airoha/
 obj-$(CONFIG_NET_VENDOR_ALACRITECH) += alacritech/
 obj-$(CONFIG_NET_VENDOR_ALLWINNER) += allwinner/
 obj-$(CONFIG_NET_VENDOR_ALTEON) += alteon/

drivers/net/ethernet/airoha/Kconfig

@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config NET_VENDOR_AIROHA
+	bool "Airoha devices"
+	depends on ARCH_AIROHA || COMPILE_TEST
+	help
+	  If you have a Airoha SoC with ethernet, say Y.
+
+if NET_VENDOR_AIROHA
+
+config NET_AIROHA_NPU
+	tristate "Airoha NPU support"
+	select WANT_DEV_COREDUMP
+	select REGMAP_MMIO
+	help
+	  This driver supports Airoha Network Processor (NPU) available
+	  on the Airoha Soc family.
+
+config NET_AIROHA
+	tristate "Airoha SoC Gigabit Ethernet support"
+	depends on NET_DSA || !NET_DSA
+	select NET_AIROHA_NPU
+	select PAGE_POOL
+	help
+	  This driver supports the gigabit ethernet MACs in the
+	  Airoha SoC family.
+
+endif #NET_VENDOR_AIROHA

drivers/net/ethernet/airoha/Makefile

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Airoha for the Mediatek SoCs built-in ethernet macs
+#
+
+obj-$(CONFIG_NET_AIROHA) += airoha-eth.o
+airoha-eth-y := airoha_eth.o airoha_ppe.o
+airoha-eth-$(CONFIG_DEBUG_FS) += airoha_ppe_debugfs.o
+obj-$(CONFIG_NET_AIROHA_NPU) += airoha_npu.o