1 files changed, 288 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_ppe.h b/drivers/net/ethernet/mediatek/mtk_ppe.h
new file mode 100644
index 000000000000..242fb8f2ae65
--- /dev/null
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
@@ -0,0 +1,288 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */
+
+#ifndef __MTK_PPE_H
+#define __MTK_PPE_H
+
+#include <linux/kernel.h>
+#include <linux/bitfield.h>
+
+#define MTK_ETH_PPE_BASE		0xc00
+
+#define MTK_PPE_ENTRIES_SHIFT		3
+#define MTK_PPE_ENTRIES			(1024 << MTK_PPE_ENTRIES_SHIFT)
+#define MTK_PPE_HASH_MASK		(MTK_PPE_ENTRIES - 1)
+#define MTK_PPE_WAIT_TIMEOUT_US		1000000
+
+#define MTK_FOE_IB1_UNBIND_TIMESTAMP	GENMASK(7, 0)
+#define MTK_FOE_IB1_UNBIND_PACKETS	GENMASK(23, 8)
+#define MTK_FOE_IB1_UNBIND_PREBIND	BIT(24)
+
+#define MTK_FOE_IB1_BIND_TIMESTAMP	GENMASK(14, 0)
+#define MTK_FOE_IB1_BIND_KEEPALIVE	BIT(15)
+#define MTK_FOE_IB1_BIND_VLAN_LAYER	GENMASK(18, 16)
+#define MTK_FOE_IB1_BIND_PPPOE		BIT(19)
+#define MTK_FOE_IB1_BIND_VLAN_TAG	BIT(20)
+#define MTK_FOE_IB1_BIND_PKT_SAMPLE	BIT(21)
+#define MTK_FOE_IB1_BIND_CACHE		BIT(22)
+#define MTK_FOE_IB1_BIND_TUNNEL_DECAP	BIT(23)
+#define MTK_FOE_IB1_BIND_TTL		BIT(24)
+
+#define MTK_FOE_IB1_PACKET_TYPE		GENMASK(27, 25)
+#define MTK_FOE_IB1_STATE		GENMASK(29, 28)
+#define MTK_FOE_IB1_UDP			BIT(30)
+#define MTK_FOE_IB1_STATIC		BIT(31)
+
+enum {
+	MTK_PPE_PKT_TYPE_IPV4_HNAPT = 0,
+	MTK_PPE_PKT_TYPE_IPV4_ROUTE = 1,
+	MTK_PPE_PKT_TYPE_BRIDGE = 2,
+	MTK_PPE_PKT_TYPE_IPV4_DSLITE = 3,
+	MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T = 4,
+	MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T = 5,
+	MTK_PPE_PKT_TYPE_IPV6_6RD = 7,
+};
+
+#define MTK_FOE_IB2_QID			GENMASK(3, 0)
+#define MTK_FOE_IB2_PSE_QOS		BIT(4)
+#define MTK_FOE_IB2_DEST_PORT		GENMASK(7, 5)
+#define MTK_FOE_IB2_MULTICAST		BIT(8)
+
+#define MTK_FOE_IB2_WHNAT_QID2		GENMASK(13, 12)
+#define MTK_FOE_IB2_WHNAT_DEVIDX	BIT(16)
+#define MTK_FOE_IB2_WHNAT_NAT		BIT(17)
+
+#define MTK_FOE_IB2_PORT_MG		GENMASK(17, 12)
+
+#define MTK_FOE_IB2_PORT_AG		GENMASK(23, 18)
+
+#define MTK_FOE_IB2_DSCP		GENMASK(31, 24)
+
+#define MTK_FOE_VLAN2_WHNAT_BSS		GEMMASK(5, 0)
+#define MTK_FOE_VLAN2_WHNAT_WCID	GENMASK(13, 6)
+#define MTK_FOE_VLAN2_WHNAT_RING	GENMASK(15, 14)
+
+enum {
+	MTK_FOE_STATE_INVALID,
+	MTK_FOE_STATE_UNBIND,
+	MTK_FOE_STATE_BIND,
+	MTK_FOE_STATE_FIN
+};
+
+struct mtk_foe_mac_info {
+	u16 vlan1;
+	u16 etype;
+
+	u32 dest_mac_hi;
+
+	u16 vlan2;
+	u16 dest_mac_lo;
+
+	u32 src_mac_hi;
+
+	u16 pppoe_id;
+	u16 src_mac_lo;
+};
+
+struct mtk_foe_bridge {
+	u32 dest_mac_hi;
+
+	u16 src_mac_lo;
+	u16 dest_mac_lo;
+
+	u32 src_mac_hi;
+
+	u32 ib2;
+
+	u32 _rsv[5];
+
+	u32 udf_tsid;
+	struct mtk_foe_mac_info l2;
+};
+
+struct mtk_ipv4_tuple {
+	u32 src_ip;
+	u32 dest_ip;
+	union {
+		struct {
+			u16 dest_port;
+			u16 src_port;
+		};
+		struct {
+			u8 protocol;
+			u8 _pad[3]; /* fill with 0xa5a5a5 */
+		};
+		u32 ports;
+	};
+};
+
+struct mtk_foe_ipv4 {
+	struct mtk_ipv4_tuple orig;
+
+	u32 ib2;
+
+	struct mtk_ipv4_tuple new;
+
+	u16 timestamp;
+	u16 _rsv0[3];
+
+	u32 udf_tsid;
+
+	struct mtk_foe_mac_info l2;
+};
+
+struct mtk_foe_ipv4_dslite {
+	struct mtk_ipv4_tuple ip4;
+
+	u32 tunnel_src_ip[4];
+	u32 tunnel_dest_ip[4];
+
+	u8 flow_label[3];
+	u8 priority;
+
+	u32 udf_tsid;
+
+	u32 ib2;
+
+	struct mtk_foe_mac_info l2;
+};
+
+struct mtk_foe_ipv6 {
+	u32 src_ip[4];
+	u32 dest_ip[4];
+
+	union {
+		struct {
+			u8 protocol;
+			u8 _pad[3]; /* fill with 0xa5a5a5 */
+		}; /* 3-tuple */
+		struct {
+			u16 dest_port;
+			u16 src_port;
+		}; /* 5-tuple */
+		u32 ports;
+	};
+
+	u32 _rsv[3];
+
+	u32 udf;
+
+	u32 ib2;
+	struct mtk_foe_mac_info l2;
+};
+
+struct mtk_foe_ipv6_6rd {
+	u32 src_ip[4];
+	u32 dest_ip[4];
+	u16 dest_port;
+	u16 src_port;
+
+	u32 tunnel_src_ip;
+	u32 tunnel_dest_ip;
+
+	u16 hdr_csum;
+	u8 dscp;
+	u8 ttl;
+
+	u8 flag;
+	u8 pad;
+	u8 per_flow_6rd_id;
+	u8 pad2;
+
+	u32 ib2;
+	struct mtk_foe_mac_info l2;
+};
+
+struct mtk_foe_entry {
+	u32 ib1;
+
+	union {
+		struct mtk_foe_bridge bridge;
+		struct mtk_foe_ipv4 ipv4;
+		struct mtk_foe_ipv4_dslite dslite;
+		struct mtk_foe_ipv6 ipv6;
+		struct mtk_foe_ipv6_6rd ipv6_6rd;
+		u32 data[19];
+	};
+};
+
+enum {
+	MTK_PPE_CPU_REASON_TTL_EXCEEDED			= 0x02,
+	MTK_PPE_CPU_REASON_OPTION_HEADER		= 0x03,
+	MTK_PPE_CPU_REASON_NO_FLOW			= 0x07,
+	MTK_PPE_CPU_REASON_IPV4_FRAG			= 0x08,
+	MTK_PPE_CPU_REASON_IPV4_DSLITE_FRAG		= 0x09,
+	MTK_PPE_CPU_REASON_IPV4_DSLITE_NO_TCP_UDP	= 0x0a,
+	MTK_PPE_CPU_REASON_IPV6_6RD_NO_TCP_UDP		= 0x0b,
+	MTK_PPE_CPU_REASON_TCP_FIN_SYN_RST		= 0x0c,
+	MTK_PPE_CPU_REASON_UN_HIT			= 0x0d,
+	MTK_PPE_CPU_REASON_HIT_UNBIND			= 0x0e,
+	MTK_PPE_CPU_REASON_HIT_UNBIND_RATE_REACHED	= 0x0f,
+	MTK_PPE_CPU_REASON_HIT_BIND_TCP_FIN		= 0x10,
+	MTK_PPE_CPU_REASON_HIT_TTL_1			= 0x11,
+	MTK_PPE_CPU_REASON_HIT_BIND_VLAN_VIOLATION	= 0x12,
+	MTK_PPE_CPU_REASON_KEEPALIVE_UC_OLD_HDR		= 0x13,
+	MTK_PPE_CPU_REASON_KEEPALIVE_MC_NEW_HDR		= 0x14,
+	MTK_PPE_CPU_REASON_KEEPALIVE_DUP_OLD_HDR	= 0x15,
+	MTK_PPE_CPU_REASON_HIT_BIND_FORCE_CPU		= 0x16,
+	MTK_PPE_CPU_REASON_TUNNEL_OPTION_HEADER		= 0x17,
+	MTK_PPE_CPU_REASON_MULTICAST_TO_CPU		= 0x18,
+	MTK_PPE_CPU_REASON_MULTICAST_TO_GMAC1_CPU	= 0x19,
+	MTK_PPE_CPU_REASON_HIT_PRE_BIND			= 0x1a,
+	MTK_PPE_CPU_REASON_PACKET_SAMPLING		= 0x1b,
+	MTK_PPE_CPU_REASON_EXCEED_MTU			= 0x1c,
+	MTK_PPE_CPU_REASON_PPE_BYPASS			= 0x1e,
+	MTK_PPE_CPU_REASON_INVALID			= 0x1f,
+};
+
+struct mtk_ppe {
+	struct device *dev;
+	void __iomem *base;
+	int version;
+
+	struct mtk_foe_entry *foe_table;
+	dma_addr_t foe_phys;
+
+	void *acct_table;
+};
+
+int mtk_ppe_init(struct mtk_ppe *ppe, struct device *dev, void __iomem *base,
+		 int version);
+int mtk_ppe_start(struct mtk_ppe *ppe);
+int mtk_ppe_stop(struct mtk_ppe *ppe);
+
+static inline void
+mtk_foe_entry_clear(struct mtk_ppe *ppe, u16 hash)
+{
+	ppe->foe_table[hash].ib1 = 0;
+	dma_wmb();
+}
+
+static inline int
+mtk_foe_entry_timestamp(struct mtk_ppe *ppe, u16 hash)
+{
+	u32 ib1 = READ_ONCE(ppe->foe_table[hash].ib1);
+
+	if (FIELD_GET(MTK_FOE_IB1_STATE, ib1) != MTK_FOE_STATE_BIND)
+		return -1;
+
+	return FIELD_GET(MTK_FOE_IB1_BIND_TIMESTAMP, ib1);
+}
+
+int mtk_foe_entry_prepare(struct mtk_foe_entry *entry, int type, int l4proto,
+			  u8 pse_port, u8 *src_mac, u8 *dest_mac);
+int mtk_foe_entry_set_pse_port(struct mtk_foe_entry *entry, u8 port);
+int mtk_foe_entry_set_ipv4_tuple(struct mtk_foe_entry *entry, bool orig,
+				 __be32 src_addr, __be16 src_port,
+				 __be32 dest_addr, __be16 dest_port);
+int mtk_foe_entry_set_ipv6_tuple(struct mtk_foe_entry *entry,
+				 __be32 *src_addr, __be16 src_port,
+				 __be32 *dest_addr, __be16 dest_port);
+int mtk_foe_entry_set_dsa(struct mtk_foe_entry *entry, int port);
+int mtk_foe_entry_set_vlan(struct mtk_foe_entry *entry, int vid);
+int mtk_foe_entry_set_pppoe(struct mtk_foe_entry *entry, int sid);
+int mtk_foe_entry_commit(struct mtk_ppe *ppe, struct mtk_foe_entry *entry,
+			 u16 timestamp);
+int mtk_ppe_debugfs_init(struct mtk_ppe *ppe);
+
+#endif