/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_SMC_DIAG_H_
#define _UAPI_SMC_DIAG_H_

#include <linux/types.h>
#include <linux/inet_diag.h>
#include <rdma/ib_user_verbs.h>

/* Request structure */
struct smc_diag_req {
        __u8    diag_family;
        __u8    pad[2];
        __u8    diag_ext;               /* Query extended information */
        struct inet_diag_sockid id;
};

/* Base info structure. It contains socket identity (addrs/ports/cookie) based
 * on the internal clcsock, and more SMC-related socket data
 */
struct smc_diag_msg {
        __u8            diag_family;
        __u8            diag_state;
        union {
                __u8    diag_mode;
                __u8    diag_fallback; /* the old name of the field */
        };
        __u8            diag_shutdown;
        struct inet_diag_sockid id;

        __u32           diag_uid;
        __aligned_u64   diag_inode;
};

/* Mode of a connection */
enum {
        SMC_DIAG_MODE_SMCR,
        SMC_DIAG_MODE_FALLBACK_TCP,
        SMC_DIAG_MODE_SMCD,
};

/* Extensions */

enum {
        SMC_DIAG_NONE,
        SMC_DIAG_CONNINFO,
        SMC_DIAG_LGRINFO,
        SMC_DIAG_SHUTDOWN,
        SMC_DIAG_DMBINFO,
        SMC_DIAG_FALLBACK,
        __SMC_DIAG_MAX,
};

#define SMC_DIAG_MAX (__SMC_DIAG_MAX - 1)

/* SMC_DIAG_CONNINFO */

struct smc_diag_cursor {
        __u16   reserved;
        __u16   wrap;
        __u32   count;
};

struct smc_diag_conninfo {
        __u32                   token;          /* unique connection id */
        __u32                   sndbuf_size;    /* size of send buffer */
        __u32                   rmbe_size;      /* size of RMB element */
        __u32                   peer_rmbe_size; /* size of peer RMB element */
        /* local RMB element cursors */
        struct smc_diag_cursor  rx_prod;        /* received producer cursor */
        struct smc_diag_cursor  rx_cons;        /* received consumer cursor */
        /* peer RMB element cursors */
        struct smc_diag_cursor  tx_prod;        /* sent producer cursor */
        struct smc_diag_cursor  tx_cons;        /* sent consumer cursor */
        __u8                    rx_prod_flags;  /* received producer flags */
        __u8                    rx_conn_state_flags; /* recvd connection flags*/
        __u8                    tx_prod_flags;  /* sent producer flags */
        __u8                    tx_conn_state_flags; /* sent connection flags*/
        /* send buffer cursors */
        struct smc_diag_cursor  tx_prep;        /* prepared to be sent cursor */
        struct smc_diag_cursor  tx_sent;        /* sent cursor */
        struct smc_diag_cursor  tx_fin;         /* confirmed sent cursor */
};

/* SMC_DIAG_LINKINFO */

struct smc_diag_linkinfo {
        __u8 link_id;                   /* link identifier */
        __u8 ibname[IB_DEVICE_NAME_MAX]; /* name of the RDMA device */
        __u8 ibport;                    /* RDMA device port number */
        __u8 gid[40];                   /* local GID */
        __u8 peer_gid[40];              /* peer GID */
};

struct smc_diag_lgrinfo {
        struct smc_diag_linkinfo        lnk[1];
        __u8                            role;
};

struct smc_diag_fallback {
        __u32 reason;
        __u32 peer_diagnosis;
};

struct smcd_diag_dmbinfo {              /* SMC-D Socket internals */
        __u32           linkid;         /* Link identifier */
        __aligned_u64   peer_gid;       /* Peer GID */
        __aligned_u64   my_gid;         /* My GID */
        __aligned_u64   token;          /* Token of DMB */
        __aligned_u64   peer_token;     /* Token of remote DMBE */
        __aligned_u64   peer_gid_ext;   /* Peer GID (extended part) */
        __aligned_u64   my_gid_ext;     /* My GID (extended part) */
};

#endif /* _UAPI_SMC_DIAG_H_ */