/*
 * sfe.h
 *	Shortcut forwarding engine.
 *
 * Copyright (c) 2013-2017 The Linux Foundation. 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.
 */


/*
 * The following are debug macros used throughout the SFE.
 *
 * The DEBUG_LEVEL enables the followings based on its value,
 * when dynamic debug option is disabled.
 *
 * 0 = OFF
 * 1 = ASSERTS / ERRORS
 * 2 = 1 + WARN
 * 3 = 2 + INFO
 * 4 = 3 + TRACE
 */
#define DEBUG_LEVEL 2

#if (DEBUG_LEVEL < 1)
#define DEBUG_ASSERT(s, ...)
#define DEBUG_ERROR(s, ...)
#else
#define DEBUG_ASSERT(c, s, ...) if (!(c)) { pr_emerg("ASSERT: %s:%d:" s, __FUNCTION__, __LINE__, ##__VA_ARGS__); BUG(); }
#define DEBUG_ERROR(s, ...) pr_err("%s:%d:" s, __FUNCTION__, __LINE__, ##__VA_ARGS__)
#endif

#if defined(CONFIG_DYNAMIC_DEBUG)
/*
 * Compile messages for dynamic enable/disable
 */
#define DEBUG_WARN(s, ...) pr_debug("%s[%d]:" s, __FUNCTION__, __LINE__, ##__VA_ARGS__)
#define DEBUG_INFO(s, ...) pr_debug("%s[%d]:" s, __FUNCTION__, __LINE__, ##__VA_ARGS__)
#define DEBUG_TRACE(s, ...) pr_debug("%s[%d]:" s, __FUNCTION__, __LINE__, ##__VA_ARGS__)
#else

/*
 * Statically compile messages at different levels
 */
#if (DEBUG_LEVEL < 2)
#define DEBUG_WARN(s, ...)
#else
#define DEBUG_WARN(s, ...) pr_warn("%s[%d]:" s, __FUNCTION__, __LINE__, ##__VA_ARGS__)
#endif

#if (DEBUG_LEVEL < 3)
#define DEBUG_INFO(s, ...)
#else
#define DEBUG_INFO(s, ...) pr_notice("%s[%d]:" s, __FUNCTION__, __LINE__, ##__VA_ARGS__)
#endif

#if (DEBUG_LEVEL < 4)
#define DEBUG_TRACE(s, ...)
#else
#define DEBUG_TRACE(s, ...) pr_info("%s[%d]:" s, __FUNCTION__, __LINE__, ##__VA_ARGS__)
#endif
#endif

#ifdef CONFIG_NF_FLOW_COOKIE
typedef int (*flow_cookie_set_func_t)(u32 protocol, __be32 src_ip, __be16 src_port,
				      __be32 dst_ip, __be16 dst_port, u16 flow_cookie);
/*
 * sfe_register_flow_cookie_cb
 *	register a function in SFE to let SFE use this function to configure flow cookie for a flow
 *
 * Hardware driver which support flow cookie should register a callback function in SFE. Then SFE
 * can use this function to configure flow cookie for a flow.
 * return: 0, success; !=0, fail
 */
int sfe_register_flow_cookie_cb(flow_cookie_set_func_t cb);

/*
 * sfe_unregister_flow_cookie_cb
 *	unregister function which is used to configure flow cookie for a flow
 *
 * return: 0, success; !=0, fail
 */
int sfe_unregister_flow_cookie_cb(flow_cookie_set_func_t cb);

typedef int (*sfe_ipv6_flow_cookie_set_func_t)(u32 protocol, __be32 src_ip[4], __be16 src_port,
						__be32 dst_ip[4], __be16 dst_port, u16 flow_cookie);

/*
 * sfe_ipv6_register_flow_cookie_cb
 *	register a function in SFE to let SFE use this function to configure flow cookie for a flow
 *
 * Hardware driver which support flow cookie should register a callback function in SFE. Then SFE
 * can use this function to configure flow cookie for a flow.
 * return: 0, success; !=0, fail
 */
int sfe_ipv6_register_flow_cookie_cb(sfe_ipv6_flow_cookie_set_func_t cb);

/*
 * sfe_ipv6_unregister_flow_cookie_cb
 *	unregister function which is used to configure flow cookie for a flow
 *
 * return: 0, success; !=0, fail
 */
int sfe_ipv6_unregister_flow_cookie_cb(sfe_ipv6_flow_cookie_set_func_t cb);

#endif /*CONFIG_NF_FLOW_COOKIE*/