/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */


#ifndef _LINUX_RDS_H
#define _LINUX_RDS_H

#include <linux/types.h>
#include <linux/socket.h>		
#include <linux/in6.h>			

#define RDS_IB_ABI_VERSION		0x301

#define	SOL_RDS		276


#define RDS_CANCEL_SENT_TO      	1
#define RDS_GET_MR			2
#define RDS_FREE_MR			3

#define RDS_RECVERR			5
#define RDS_CONG_MONITOR		6
#define RDS_GET_MR_FOR_DEST		7
#define SO_RDS_TRANSPORT		8


#define SO_RDS_MSG_RXPATH_LATENCY	10



#define	RDS_TRANS_IB	0
#define	RDS_TRANS_GAP	1
#define	RDS_TRANS_TCP	2
#define RDS_TRANS_COUNT	3
#define	RDS_TRANS_NONE	(~0)

#define RDS_TRANS_IWARP RDS_TRANS_GAP


#define SIOCRDSSETTOS		(SIOCPROTOPRIVATE)
#define SIOCRDSGETTOS		(SIOCPROTOPRIVATE + 1)

typedef __u8	rds_tos_t;


#define RDS_CMSG_RDMA_ARGS		1
#define RDS_CMSG_RDMA_DEST		2
#define RDS_CMSG_RDMA_MAP		3
#define RDS_CMSG_RDMA_STATUS		4
#define RDS_CMSG_CONG_UPDATE		5
#define RDS_CMSG_ATOMIC_FADD		6
#define RDS_CMSG_ATOMIC_CSWP		7
#define RDS_CMSG_MASKED_ATOMIC_FADD	8
#define RDS_CMSG_MASKED_ATOMIC_CSWP	9
#define RDS_CMSG_RXPATH_LATENCY		11
#define	RDS_CMSG_ZCOPY_COOKIE		12
#define	RDS_CMSG_ZCOPY_COMPLETION	13

#define RDS_INFO_FIRST			10000
#define RDS_INFO_COUNTERS		10000
#define RDS_INFO_CONNECTIONS		10001

#define RDS_INFO_SEND_MESSAGES		10003
#define RDS_INFO_RETRANS_MESSAGES       10004
#define RDS_INFO_RECV_MESSAGES          10005
#define RDS_INFO_SOCKETS                10006
#define RDS_INFO_TCP_SOCKETS            10007
#define RDS_INFO_IB_CONNECTIONS		10008
#define RDS_INFO_CONNECTION_STATS	10009
#define RDS_INFO_IWARP_CONNECTIONS	10010


#define RDS6_INFO_CONNECTIONS		10011
#define RDS6_INFO_SEND_MESSAGES		10012
#define RDS6_INFO_RETRANS_MESSAGES	10013
#define RDS6_INFO_RECV_MESSAGES		10014
#define RDS6_INFO_SOCKETS		10015
#define RDS6_INFO_TCP_SOCKETS		10016
#define RDS6_INFO_IB_CONNECTIONS	10017

#define RDS_INFO_LAST			10017

struct rds_info_counter {
	__u8	name[32];
	__u64	value;
} __attribute__((packed));

#define RDS_INFO_CONNECTION_FLAG_SENDING	0x01
#define RDS_INFO_CONNECTION_FLAG_CONNECTING	0x02
#define RDS_INFO_CONNECTION_FLAG_CONNECTED	0x04

#define TRANSNAMSIZ	16

struct rds_info_connection {
	__u64		next_tx_seq;
	__u64		next_rx_seq;
	__be32		laddr;
	__be32		faddr;
	__u8		transport[TRANSNAMSIZ];		
	__u8		flags;
	__u8		tos;
} __attribute__((packed));

struct rds6_info_connection {
	__u64		next_tx_seq;
	__u64		next_rx_seq;
	struct in6_addr	laddr;
	struct in6_addr	faddr;
	__u8		transport[TRANSNAMSIZ];		
	__u8		flags;
} __attribute__((packed));

#define RDS_INFO_MESSAGE_FLAG_ACK               0x01
#define RDS_INFO_MESSAGE_FLAG_FAST_ACK          0x02

struct rds_info_message {
	__u64		seq;
	__u32		len;
	__be32		laddr;
	__be32		faddr;
	__be16		lport;
	__be16		fport;
	__u8		flags;
	__u8		tos;
} __attribute__((packed));

struct rds6_info_message {
	__u64	seq;
	__u32	len;
	struct in6_addr	laddr;
	struct in6_addr	faddr;
	__be16		lport;
	__be16		fport;
	__u8		flags;
	__u8		tos;
} __attribute__((packed));

struct rds_info_socket {
	__u32		sndbuf;
	__be32		bound_addr;
	__be32		connected_addr;
	__be16		bound_port;
	__be16		connected_port;
	__u32		rcvbuf;
	__u64		inum;
} __attribute__((packed));

struct rds6_info_socket {
	__u32		sndbuf;
	struct in6_addr	bound_addr;
	struct in6_addr	connected_addr;
	__be16		bound_port;
	__be16		connected_port;
	__u32		rcvbuf;
	__u64		inum;
} __attribute__((packed));

struct rds_info_tcp_socket {
	__be32          local_addr;
	__be16          local_port;
	__be32          peer_addr;
	__be16          peer_port;
	__u64           hdr_rem;
	__u64           data_rem;
	__u32           last_sent_nxt;
	__u32           last_expected_una;
	__u32           last_seen_una;
	__u8		tos;
} __attribute__((packed));

struct rds6_info_tcp_socket {
	struct in6_addr	local_addr;
	__be16		local_port;
	struct in6_addr	peer_addr;
	__be16		peer_port;
	__u64		hdr_rem;
	__u64		data_rem;
	__u32		last_sent_nxt;
	__u32		last_expected_una;
	__u32		last_seen_una;
} __attribute__((packed));

#define RDS_IB_GID_LEN	16
struct rds_info_rdma_connection {
	__be32		src_addr;
	__be32		dst_addr;
	__u8		src_gid[RDS_IB_GID_LEN];
	__u8		dst_gid[RDS_IB_GID_LEN];

	__u32		max_send_wr;
	__u32		max_recv_wr;
	__u32		max_send_sge;
	__u32		rdma_mr_max;
	__u32		rdma_mr_size;
	__u8		tos;
	__u8		sl;
	__u32		cache_allocs;
};

struct rds6_info_rdma_connection {
	struct in6_addr	src_addr;
	struct in6_addr	dst_addr;
	__u8		src_gid[RDS_IB_GID_LEN];
	__u8		dst_gid[RDS_IB_GID_LEN];

	__u32		max_send_wr;
	__u32		max_recv_wr;
	__u32		max_send_sge;
	__u32		rdma_mr_max;
	__u32		rdma_mr_size;
	__u8		tos;
	__u8		sl;
	__u32		cache_allocs;
};


enum rds_message_rxpath_latency {
	RDS_MSG_RX_HDR_TO_DGRAM_START = 0,
	RDS_MSG_RX_DGRAM_REASSEMBLE,
	RDS_MSG_RX_DGRAM_DELIVERED,
	RDS_MSG_RX_DGRAM_TRACE_MAX
};

struct rds_rx_trace_so {
	__u8 rx_traces;
	__u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];
};

struct rds_cmsg_rx_trace {
	__u8 rx_traces;
	__u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];
	__u64 rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX];
};


#define RDS_CONG_MONITOR_SIZE	64
#define RDS_CONG_MONITOR_BIT(port)  (((unsigned int) port) % RDS_CONG_MONITOR_SIZE)
#define RDS_CONG_MONITOR_MASK(port) (1ULL << RDS_CONG_MONITOR_BIT(port))




typedef __u64		rds_rdma_cookie_t;

struct rds_iovec {
	__u64		addr;
	__u64		bytes;
};

struct rds_get_mr_args {
	struct rds_iovec vec;
	__u64		cookie_addr;
	__u64		flags;
};

struct rds_get_mr_for_dest_args {
	struct __kernel_sockaddr_storage dest_addr;
	struct rds_iovec 	vec;
	__u64			cookie_addr;
	__u64			flags;
};

struct rds_free_mr_args {
	rds_rdma_cookie_t cookie;
	__u64		flags;
};

struct rds_rdma_args {
	rds_rdma_cookie_t cookie;
	struct rds_iovec remote_vec;
	__u64		local_vec_addr;
	__u64		nr_local;
	__u64		flags;
	__u64		user_token;
};

struct rds_atomic_args {
	rds_rdma_cookie_t cookie;
	__u64		local_addr;
	__u64		remote_addr;
	union {
		struct {
			__u64		compare;
			__u64		swap;
		} cswp;
		struct {
			__u64		add;
		} fadd;
		struct {
			__u64		compare;
			__u64		swap;
			__u64		compare_mask;
			__u64		swap_mask;
		} m_cswp;
		struct {
			__u64		add;
			__u64		nocarry_mask;
		} m_fadd;
	};
	__u64		flags;
	__u64		user_token;
};

struct rds_rdma_notify {
	__u64		user_token;
	__s32		status;
};

#define RDS_RDMA_SUCCESS	0
#define RDS_RDMA_REMOTE_ERROR	1
#define RDS_RDMA_CANCELED	2
#define RDS_RDMA_DROPPED	3
#define RDS_RDMA_OTHER_ERROR	4

#define	RDS_MAX_ZCOOKIES	8
struct rds_zcopy_cookies {
	__u32 num;
	__u32 cookies[RDS_MAX_ZCOOKIES];
};


#define RDS_RDMA_READWRITE	0x0001
#define RDS_RDMA_FENCE		0x0002	
#define RDS_RDMA_INVALIDATE	0x0004	
#define RDS_RDMA_USE_ONCE	0x0008	
#define RDS_RDMA_DONTWAIT	0x0010	
#define RDS_RDMA_NOTIFY_ME	0x0020	
#define RDS_RDMA_SILENT		0x0040	

#endif 
