[qca-nss-sfe] Refactoring SFE code
This refactoring contains the following areas.
1) delete fast-classifier and SFE CM.
2) combine all the files into one kernel module.
3) move the definitions in sfe_ipv4 and sfe_ipv6 to separate header files.
4) add debug header file.
5) Filename and namespace changes for sfe_drv.c and sfe_drv.h
Change-Id: I85386e03771eba489d6e319cd2bef4245b340f7f
Signed-off-by: Ratheesh Kannoth <quic_rkannoth@quicinc.com>
diff --git a/exports/sfe_api.h b/exports/sfe_api.h
new file mode 100644
index 0000000..edf6a66
--- /dev/null
+++ b/exports/sfe_api.h
@@ -0,0 +1,551 @@
+/*
+ * sfe_api.h
+ * SFE exported function headers for SFE engine
+ *
+ * Copyright (c) 2015,2016, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021 Qualcomm Innovation Center, Inc. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef __SFE_API_H
+#define __SFE_API_H
+
+#define SFE_MAX_VLAN_DEPTH 2
+#define SFE_VLAN_ID_NOT_CONFIGURED 0xfff
+
+#define SFE_SPECIAL_INTERFACE_BASE 0x7f00
+#define SFE_SPECIAL_INTERFACE_IPV4 (SFE_SPECIAL_INTERFACE_BASE + 1)
+#define SFE_SPECIAL_INTERFACE_IPV6 (SFE_SPECIAL_INTERFACE_BASE + 2)
+#define SFE_SPECIAL_INTERFACE_IPSEC (SFE_SPECIAL_INTERFACE_BASE + 3)
+#define SFE_SPECIAL_INTERFACE_L2TP (SFE_SPECIAL_INTERFACE_BASE + 4)
+#define SFE_SPECIAL_INTERFACE_PPTP (SFE_SPECIAL_INTERFACE_BASE + 5)
+
+/**
+ * Rule creation & rule update flags.
+ */
+#define SFE_RULE_CREATE_FLAG_NO_SEQ_CHECK (1<<0) /**< Do not perform TCP sequence number checks */
+#define SFE_RULE_CREATE_FLAG_BRIDGE_FLOW (1<<1) /**< This is a pure bridge forwarding flow */
+#define SFE_RULE_CREATE_FLAG_ROUTED (1<<2) /**< Rule is for a routed connection */
+#define SFE_RULE_CREATE_FLAG_DSCP_MARKING (1<<3) /**< Rule has for a DSCP marking configured*/
+#define SFE_RULE_CREATE_FLAG_VLAN_MARKING (1<<4) /**< Rule has for a VLAN marking configured*/
+#define SFE_RULE_UPDATE_FLAG_CHANGE_MTU (1<<5) /**< Update MTU of connection interfaces */
+#define SFE_RULE_CREATE_FLAG_ICMP_NO_CME_FLUSH (1<<6)/**< Rule for not flushing CME on ICMP pkt */
+#define SFE_RULE_CREATE_FLAG_L2_ENCAP (1<<7) /**< consists of an encapsulating protocol that carries an IPv4 payload within it. */
+
+/**
+ * Rule creation validity flags.
+ */
+#define SFE_RULE_CREATE_CONN_VALID (1<<0) /**< IPv4 Connection is valid */
+#define SFE_RULE_CREATE_TCP_VALID (1<<1) /**< TCP Protocol fields are valid */
+#define SFE_RULE_CREATE_PPPOE_VALID (1<<2) /**< PPPoE fields are valid */
+#define SFE_RULE_CREATE_QOS_VALID (1<<3) /**< QoS fields are valid */
+#define SFE_RULE_CREATE_VLAN_VALID (1<<4) /**< VLAN fields are valid */
+#define SFE_RULE_CREATE_DSCP_MARKING_VALID (1<<5) /**< DSCP marking fields are valid */
+#define SFE_RULE_CREATE_VLAN_MARKING_VALID (1<<6) /**< VLAN marking fields are valid */
+#define SFE_RULE_CREATE_DIRECTION_VALID (1<<7) /**< specify acceleration directions */
+
+/*
+ * 32/64 bits pointer type
+ */
+#ifdef __LP64__
+typedef uint64_t sfe_ptr_t;
+#else
+typedef uint32_t sfe_ptr_t;
+#endif
+
+typedef enum sfe_rule_sync_reason {
+ SFE_RULE_SYNC_REASON_STATS, /* Sync is to synchronize stats */
+ SFE_RULE_SYNC_REASON_FLUSH, /* Sync is to flush a entry */
+ SFE_RULE_SYNC_REASON_EVICT, /* Sync is to evict a entry */
+ SFE_RULE_SYNC_REASON_DESTROY /* Sync is to destroy a entry(requested by connection manager) */
+
+} sfe_rule_sync_reason_t;
+
+/**
+ * Tx command status
+ */
+typedef enum {
+ SFE_TX_SUCCESS = 0, /**< Success */
+ SFE_TX_FAILURE, /**< Command failure other than descriptor not available */
+ SFE_TX_FAILURE_QUEUE, /**< Command failure due to descriptor not available */
+ SFE_TX_FAILURE_NOT_READY, /**< Command failure due to SFE state uninitialized */
+ SFE_TX_FAILURE_TOO_LARGE, /**< Command is too large to fit in one message */
+ SFE_TX_FAILURE_TOO_SHORT, /**< Command/Packet is shorter than expected size */
+ SFE_TX_FAILURE_NOT_SUPPORTED, /**< Command/Packet not accepted for forwarding */
+ SFE_TX_FAILURE_BAD_PARAM, /**< Command failure due to bad parameters */
+ SFE_TX_FAILURE_NOT_ENABLED, /**< Command failure due to SFE feature is not enabled */
+} sfe_tx_status_t;
+
+/**
+ * Common response types.
+ */
+enum sfe_cmn_response {
+ SFE_CMN_RESPONSE_ACK, /**< Message Acknowledge */
+ SFE_CMN_RESPONSE_EVERSION, /**< Message Version Error */
+ SFE_CMN_RESPONSE_EINTERFACE, /**< Message Interface Error */
+ SFE_CMN_RESPONSE_ELENGTH, /**< Message Length Error */
+ SFE_CMN_RESPONSE_EMSG, /**< Message Error */
+ SFE_CMM_RESPONSE_NOTIFY, /**< Message Independant of Request */
+ SFE_CMN_RESPONSE_LAST
+};
+
+/**
+ * IPv4 bridge/route rule messages
+ */
+enum sfe_message_types {
+ SFE_TX_CREATE_RULE_MSG, /**< IPv4/6 create rule message */
+ SFE_TX_DESTROY_RULE_MSG, /**< IPv4/6 destroy rule message */
+ SFE_RX_CONN_STATS_SYNC_MSG, /**< IPv4/6 connection stats sync message */
+ SFE_TUN6RD_ADD_UPDATE_PEER, /**< Add/update peer for 6rd tunnel */
+ SFE_MAX_MSG_TYPES, /**< IPv4/6 message max type number */
+};
+
+/**
+ * Common message structure
+ */
+struct sfe_cmn_msg {
+ u16 version; /**< Version id for main message format */
+ u16 interface; /**< Primary Key for all messages */
+ enum sfe_cmn_response response; /**< Primary response */
+ u32 type; /**< Decetralized request #, to be used to match response # */
+ u32 error; /**< Decentralized specific error message, response == EMSG */
+ sfe_ptr_t cb; /**< Place for callback pointer */
+ sfe_ptr_t app_data; /**< Place for app data */
+ u32 len; /**< What is the length of the message excluding this header */
+};
+
+/**
+ * Common 5 tuple structure
+ */
+struct sfe_ipv4_5tuple {
+ __be32 flow_ip; /**< Flow IP address */
+ __be32 return_ip; /**< Return IP address */
+ __be16 flow_ident; /**< Flow ident (e.g. TCP/UDP port) */
+ __be16 return_ident; /**< Return ident (e.g. TCP/UDP port) */
+ u8 protocol; /**< Protocol number */
+ u8 reserved[3]; /**< Padded for alignment */
+};
+
+/**
+ * IPv4 connection rule structure.
+ */
+struct sfe_ipv4_connection_rule {
+ u8 flow_mac[6]; /**< Flow MAC address */
+ u8 return_mac[6]; /**< Return MAC address */
+ s32 flow_interface_num; /**< Flow interface number */
+ s32 return_interface_num; /**< Return interface number */
+ s32 flow_top_interface_num; /* Top flow interface number */
+ s32 return_top_interface_num;/* Top return interface number */
+ u32 flow_mtu; /**< Flow interface`s MTU */
+ u32 return_mtu; /**< Return interface`s MTU */
+ __be32 flow_ip_xlate; /**< Translated flow IP address */
+ __be32 return_ip_xlate; /**< Translated return IP address */
+ __be16 flow_ident_xlate; /**< Translated flow ident (e.g. port) */
+ __be16 return_ident_xlate; /**< Translated return ident (e.g. port) */
+};
+
+/**
+ * TCP connection rule structure
+ */
+struct sfe_protocol_tcp_rule {
+ u32 flow_max_window; /**< Flow direction's largest seen window */
+ u32 return_max_window; /**< Return direction's largest seen window */
+ u32 flow_end; /**< Flow direction's largest seen sequence + segment length */
+ u32 return_end; /**< Return direction's largest seen sequence + segment length */
+ u32 flow_max_end; /**< Flow direction's largest seen ack + max(1, win) */
+ u32 return_max_end; /**< Return direction's largest seen ack + max(1, win) */
+ u8 flow_window_scale; /**< Flow direction's window scaling factor */
+ u8 return_window_scale; /**< Return direction's window scaling factor */
+ u16 reserved; /**< Padded for alignment */
+};
+
+/**
+ * PPPoE connection rules structure
+ */
+struct sfe_pppoe_rule {
+ u16 flow_pppoe_session_id; /**< Flow direction`s PPPoE session ID. */
+ u16 flow_pppoe_remote_mac[3]; /**< Flow direction`s PPPoE Server MAC address */
+ u16 return_pppoe_session_id; /**< Return direction's PPPoE session ID. */
+ u16 return_pppoe_remote_mac[3]; /**< Return direction's PPPoE Server MAC address */
+};
+
+/**
+ * QoS connection rule structure
+ */
+struct sfe_qos_rule {
+ u32 flow_qos_tag; /**< QoS tag associated with this rule for flow direction */
+ u32 return_qos_tag; /**< QoS tag associated with this rule for return direction */
+};
+
+/**
+ * DSCP connection rule structure
+ */
+struct sfe_dscp_rule {
+ u8 flow_dscp; /**< Egress DSCP value for flow direction */
+ u8 return_dscp; /**< Egress DSCP value for return direction */
+ u8 reserved[2]; /**< Padded for alignment */
+};
+
+/**
+ * VLAN connection rule structure
+ */
+struct sfe_vlan_rule {
+ u32 ingress_vlan_tag; /**< VLAN Tag for the ingress packets */
+ u32 egress_vlan_tag; /**< VLAN Tag for egress packets */
+};
+
+/**
+ * Acceleration direction rule structure
+ * Sometimes we just want to accelerate traffic in one direction but not in another.
+ */
+struct sfe_acceleration_direction_rule {
+ u8 flow_accel; /**< Accelerate in flow direction */
+ u8 return_accel; /**< Accelerate in return direction */
+ u8 reserved[2]; /**< Padded for alignment */
+};
+
+/**
+ * The IPv4 rule create sub-message structure.
+ */
+struct sfe_ipv4_rule_create_msg {
+ /* Request */
+ u16 valid_flags; /**< Bit flags associated with the validity of parameters */
+ u16 rule_flags; /**< Bit flags associated with the rule */
+
+ struct sfe_ipv4_5tuple tuple; /**< Holds values of the 5 tuple */
+
+ struct sfe_ipv4_connection_rule conn_rule; /**< Basic connection specific data */
+ struct sfe_protocol_tcp_rule tcp_rule; /**< TCP related accleration parameters */
+ struct sfe_pppoe_rule pppoe_rule; /**< PPPoE related accleration parameters */
+ struct sfe_qos_rule qos_rule; /**< QoS related accleration parameters */
+ struct sfe_dscp_rule dscp_rule; /**< DSCP related accleration parameters */
+ struct sfe_vlan_rule vlan_primary_rule; /**< Primary VLAN related accleration parameters */
+ struct sfe_vlan_rule vlan_secondary_rule; /**< Secondary VLAN related accleration parameters */
+#ifdef CONFIG_XFRM
+ struct sfe_acceleration_direction_rule direction_rule;/* Direction related accleration parameters*/
+#endif
+ /* Response */
+ u32 index; /**< Slot ID for cache stats to host OS */
+};
+
+/**
+ * The IPv4 rule destroy sub-message structure.
+ */
+struct sfe_ipv4_rule_destroy_msg {
+ struct sfe_ipv4_5tuple tuple; /**< Holds values of the 5 tuple */
+};
+
+/**
+ * The SFE IPv4 rule sync structure.
+ */
+struct sfe_ipv4_conn_sync {
+ u32 index; /**< Slot ID for cache stats to host OS */
+ u8 protocol; /**< Protocol number */
+ __be32 flow_ip; /**< Flow IP address */
+ __be32 flow_ip_xlate; /**< Translated flow IP address */
+ __be16 flow_ident; /**< Flow ident (e.g. port) */
+ __be16 flow_ident_xlate; /**< Translated flow ident (e.g. port) */
+ u32 flow_max_window; /**< Flow direction's largest seen window */
+ u32 flow_end; /**< Flow direction's largest seen sequence + segment length */
+ u32 flow_max_end; /**< Flow direction's largest seen ack + max(1, win) */
+ u32 flow_rx_packet_count; /**< Flow interface's RX packet count */
+ u32 flow_rx_byte_count; /**< Flow interface's RX byte count */
+ u32 flow_tx_packet_count; /**< Flow interface's TX packet count */
+ u32 flow_tx_byte_count; /**< Flow interface's TX byte count */
+ u16 flow_pppoe_session_id; /**< Flow interface`s PPPoE session ID. */
+ u16 flow_pppoe_remote_mac[3];
+ /**< Flow interface's PPPoE remote server MAC address if there is any */
+ __be32 return_ip; /**< Return IP address */
+ __be32 return_ip_xlate; /**< Translated return IP address */
+ __be16 return_ident; /**< Return ident (e.g. port) */
+ __be16 return_ident_xlate; /**< Translated return ident (e.g. port) */
+ u32 return_max_window; /**< Return direction's largest seen window */
+ u32 return_end; /**< Return direction's largest seen sequence + segment length */
+ u32 return_max_end; /**< Return direction's largest seen ack + max(1, win) */
+ u32 return_rx_packet_count;
+ /**< Return interface's RX packet count */
+ u32 return_rx_byte_count; /**< Return interface's RX byte count */
+ u32 return_tx_packet_count;
+ /**< Return interface's TX packet count */
+ u32 return_tx_byte_count; /**< Return interface's TX byte count */
+ u16 return_pppoe_session_id;
+ /**< Return interface`s PPPoE session ID. */
+ u16 return_pppoe_remote_mac[3];
+ /**< Return interface's PPPoE remote server MAC address if there is any */
+ u32 inc_ticks; /**< Number of ticks since the last sync */
+ u32 reason; /**< Reason for the sync */
+
+ u8 flags; /**< Bit flags associated with the rule */
+ u32 qos_tag; /**< QoS Tag */
+ u32 cause; /**< Flush Cause */
+};
+
+/*
+ * Message structure to send/receive IPv4 bridge/route commands
+ */
+struct sfe_ipv4_msg {
+ struct sfe_cmn_msg cm; /**< Message Header */
+ union {
+ struct sfe_ipv4_rule_create_msg rule_create; /**< Message: rule create */
+ struct sfe_ipv4_rule_destroy_msg rule_destroy; /**< Message: rule destroy */
+ struct sfe_ipv4_conn_sync conn_stats; /**< Message: connection stats sync */
+ } msg;
+};
+
+/**
+ * Callback to be called when IPv4 message is received
+ */
+typedef void (*sfe_ipv4_msg_callback_t)(void *app_data, struct sfe_ipv4_msg *msg);
+
+/**
+ * IPv6 5-tuple structure.
+ */
+struct sfe_ipv6_5tuple {
+ __be32 flow_ip[4]; /**< Flow IP address */
+ __be32 return_ip[4]; /**< Return IP address */
+ __be16 flow_ident; /**< Flow ident (e.g. TCP/UDP port) */
+ __be16 return_ident; /**< Return ident (e.g. TCP/UDP port) */
+ u8 protocol; /**< Protocol number */
+ u8 reserved[3]; /**< Padded for alignment */
+};
+
+/**
+ * IPv6 connection rule structure.
+ */
+struct sfe_ipv6_connection_rule {
+ u8 flow_mac[6]; /**< Flow MAC address */
+ u8 return_mac[6]; /**< Return MAC address */
+ s32 flow_interface_num; /**< Flow interface number */
+ s32 return_interface_num; /**< Return interface number */
+ s32 flow_top_interface_num; /* Top flow interface number */
+ s32 return_top_interface_num;/* Top return interface number */
+ u32 flow_mtu; /**< Flow interface's MTU */
+ u32 return_mtu; /**< Return interface's MTU */
+};
+
+/**
+ * The IPv6 rule create sub-message structure.
+ */
+struct sfe_ipv6_rule_create_msg {
+ /*
+ * Request
+ */
+ u16 valid_flags; /**< Bit flags associated with the validity of parameters */
+ u16 rule_flags; /**< Bit flags associated with the rule */
+ struct sfe_ipv6_5tuple tuple; /**< Holds values of the 5 tuple */
+ struct sfe_ipv6_connection_rule conn_rule; /**< Basic connection specific data */
+ struct sfe_protocol_tcp_rule tcp_rule; /**< Protocol related accleration parameters */
+ struct sfe_pppoe_rule pppoe_rule; /**< PPPoE related accleration parameters */
+ struct sfe_qos_rule qos_rule; /**< QoS related accleration parameters */
+ struct sfe_dscp_rule dscp_rule; /**< DSCP related accleration parameters */
+ struct sfe_vlan_rule vlan_primary_rule; /**< VLAN related accleration parameters */
+ struct sfe_vlan_rule vlan_secondary_rule; /**< VLAN related accleration parameters */
+#ifdef CONFIG_XFRM
+ struct sfe_acceleration_direction_rule direction_rule;/* Direction related accleration parameters*/
+#endif
+ /*
+ * Response
+ */
+ u32 index; /**< Slot ID for cache stats to host OS */
+};
+
+/**
+ * The IPv6 rule destroy sub-message structure.
+ */
+struct sfe_ipv6_rule_destroy_msg {
+ struct sfe_ipv6_5tuple tuple; /**< Holds values of the 5 tuple */
+};
+
+/**
+ * The SFE IPv6 rule sync structure.
+ */
+struct sfe_ipv6_conn_sync {
+ u32 index; /**< Slot ID for cache stats to host OS */
+ u8 protocol; /**< Protocol number */
+ __be32 flow_ip[4]; /**< Flow IP address */
+ __be16 flow_ident; /**< Flow ident (e.g. port) */
+ u32 flow_max_window; /**< Flow direction's largest seen window */
+ u32 flow_end; /**< Flow direction's largest seen sequence + segment length */
+ u32 flow_max_end; /**< Flow direction's largest seen ack + max(1, win) */
+ u32 flow_rx_packet_count; /**< Flow interface's RX packet count */
+ u32 flow_rx_byte_count; /**< Flow interface's RX byte count */
+ u32 flow_tx_packet_count; /**< Flow interface's TX packet count */
+ u32 flow_tx_byte_count; /**< Flow interface's TX byte count */
+ u16 flow_pppoe_session_id; /**< Flow interface`s PPPoE session ID. */
+ u16 flow_pppoe_remote_mac[3];
+ /**< Flow interface's PPPoE remote server MAC address if there is any */
+ __be32 return_ip[4]; /**< Return IP address */
+ __be16 return_ident; /**< Return ident (e.g. port) */
+ u32 return_max_window; /**< Return direction's largest seen window */
+ u32 return_end; /**< Return direction's largest seen sequence + segment length */
+ u32 return_max_end; /**< Return direction's largest seen ack + max(1, win) */
+ u32 return_rx_packet_count;
+ /**< Return interface's RX packet count */
+ u32 return_rx_byte_count; /**< Return interface's RX byte count */
+ u32 return_tx_packet_count;
+ /**< Return interface's TX packet count */
+ u32 return_tx_byte_count; /**< Return interface's TX byte count */
+ u16 return_pppoe_session_id;
+ /**< Return interface`s PPPoE session ID. */
+ u16 return_pppoe_remote_mac[3];
+ /**< Return interface's PPPoE remote server MAC address if there is any */
+ u32 inc_ticks; /**< Number of ticks since the last sync */
+ u32 reason; /**< Reason for the sync */
+ u8 flags; /**< Bit flags associated with the rule */
+ u32 qos_tag; /**< QoS Tag */
+ u32 cause; /**< Flush cause associated with the rule */
+};
+
+/**
+ * Message structure to send/receive IPv6 bridge/route commands
+ */
+struct sfe_ipv6_msg {
+ struct sfe_cmn_msg cm; /**< Message Header */
+ union {
+ struct sfe_ipv6_rule_create_msg rule_create; /**< Message: rule create */
+ struct sfe_ipv6_rule_destroy_msg rule_destroy; /**< Message: rule destroy */
+ struct sfe_ipv6_conn_sync conn_stats; /**< Message: stats sync */
+ } msg;
+};
+
+/**
+ * Callback to be called when IPv6 message is received
+ */
+typedef void (*sfe_ipv6_msg_callback_t)(void *app_data, struct sfe_ipv6_msg *msg);
+
+/**
+ * 6rd tunnel peer addr.
+ */
+struct sfe_tun6rd_set_peer_msg {
+ __be32 ipv6_address[4]; /* The peer's ipv6 addr*/
+ __be32 dest; /* The peer's ipv4 addr*/
+};
+
+/**
+ * Message structure to send/receive 6rd tunnel messages
+ */
+struct sfe_tun6rd_msg {
+ struct sfe_cmn_msg cm; /* Message Header */
+ union {
+ struct sfe_tun6rd_set_peer_msg peer; /* Message: add/update peer */
+ } msg;
+};
+
+/*
+ * SFE context instance.
+ */
+struct sfe_ctx_instance {
+ int not_used;
+};
+
+/*
+ * sfe_ipv4_max_conn_count()
+ * Return the maximum number of IPv4 connections that the sfe acceleration engine supports
+ *
+ * @return int The number of connections that can be accelerated by the sfe
+ */
+int sfe_ipv4_max_conn_count(void);
+
+/*
+ * sfe_ipv4_tx()
+ * Transmit an IPv4 message to the sfe
+ *
+ * @param sfe_ctx SFE. context
+ * @param msg The IPv4 message
+ *
+ * @return sfe_tx_status_t The status of the Tx operation
+ */
+extern sfe_tx_status_t sfe_ipv4_tx(struct sfe_ctx_instance *sfe_ctx, struct sfe_ipv4_msg *msg);
+
+/*
+ * sfe_ipv4_notify_register()
+ * Register a notifier callback for IPv4 messages from SFE
+ *
+ * @param cb The callback pointer
+ * @param app_data The application context for this message
+ *
+ * @return struct sfe_ctx_instance * The SFE. context
+ */
+extern struct sfe_ctx_instance *sfe_ipv4_notify_register(sfe_ipv4_msg_callback_t cb, void *app_data);
+
+/*
+ * sfe_ipv4_notify_unregister()
+ * Un-Register a notifier callback for IPv4 messages from SFE
+ */
+extern void sfe_ipv4_notify_unregister(void);
+
+/*
+ * sfe_ipv4_msg_init()
+ * IPv4 message init
+ */
+extern void sfe_ipv4_msg_init(struct sfe_ipv4_msg *nim, u16 if_num, u32 type, u32 len,
+ sfe_ipv4_msg_callback_t cb, void *app_data);
+
+/*
+ * sfe_ipv6_max_conn_count()
+ * Return the maximum number of IPv6 connections that the sfe acceleration engine supports
+ *
+ * @return int The number of connections that can be accelerated by the sfe
+ */
+int sfe_ipv6_max_conn_count(void);
+
+/*
+ * sfe_ipv6_tx()
+ * Transmit an IPv6 message to the sfe
+ *
+ * @param sfe_ctx SFE. context
+ * @param msg The IPv6 message
+ *
+ * @return sfe_tx_status_t The status of the Tx operation
+ */
+extern sfe_tx_status_t sfe_ipv6_tx(struct sfe_ctx_instance *sfe_ctx, struct sfe_ipv6_msg *msg);
+
+/*
+ * sfe_ipv6_notify_register()
+ * Register a notifier callback for IPv6 messages from SFE.
+ *
+ * @param cb The callback pointer
+ * @param app_data The application context for this message
+ *
+ * @return struct sfe_ctx_instance * The SFE. context
+ */
+extern struct sfe_ctx_instance *sfe_ipv6_notify_register(sfe_ipv6_msg_callback_t cb, void *app_data);
+
+/*
+ * sfe_ipv6_notify_unregister()
+ * Un-Register a notifier callback for IPv6 messages from SFE.
+ */
+extern void sfe_ipv6_notify_unregister(void);
+
+/*
+ * sfe_ipv6_msg_init()
+ * IPv6 message init
+ */
+extern void sfe_ipv6_msg_init(struct sfe_ipv6_msg *nim, u16 if_num, u32 type, u32 len,
+ sfe_ipv6_msg_callback_t cb, void *app_data);
+
+/*
+ * sfe_tun6rd_tx()
+ * Transmit a tun6rd message to sfe engine
+ */
+sfe_tx_status_t sfe_tun6rd_tx(struct sfe_ctx_instance *sfe_ctx, struct sfe_tun6rd_msg *msg);
+
+/*
+ * sfe_tun6rd_msg_init()
+ * Initialize sfe_tun6rd msg.
+ */
+void sfe_tun6rd_msg_init(struct sfe_tun6rd_msg *ncm, u16 if_num, u32 type, u32 len,
+ void *cb, void *app_data);
+
+#endif /* __SFE_API_H */