// 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
