xref: /openbmc/linux/include/uapi/linux/smc_diag.h (revision c86d8613)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_SMC_DIAG_H_
3 #define _UAPI_SMC_DIAG_H_
4 
5 #include <linux/types.h>
6 #include <linux/inet_diag.h>
7 #include <rdma/ib_user_verbs.h>
8 
9 /* Request structure */
10 struct smc_diag_req {
11 	__u8	diag_family;
12 	__u8	pad[2];
13 	__u8	diag_ext;		/* Query extended information */
14 	struct inet_diag_sockid	id;
15 };
16 
17 /* Base info structure. It contains socket identity (addrs/ports/cookie) based
18  * on the internal clcsock, and more SMC-related socket data
19  */
20 struct smc_diag_msg {
21 	__u8		diag_family;
22 	__u8		diag_state;
23 	union {
24 		__u8	diag_mode;
25 		__u8	diag_fallback; /* the old name of the field */
26 	};
27 	__u8		diag_shutdown;
28 	struct inet_diag_sockid id;
29 
30 	__u32		diag_uid;
31 	__aligned_u64	diag_inode;
32 };
33 
34 /* Mode of a connection */
35 enum {
36 	SMC_DIAG_MODE_SMCR,
37 	SMC_DIAG_MODE_FALLBACK_TCP,
38 	SMC_DIAG_MODE_SMCD,
39 };
40 
41 /* Extensions */
42 
43 enum {
44 	SMC_DIAG_NONE,
45 	SMC_DIAG_CONNINFO,
46 	SMC_DIAG_LGRINFO,
47 	SMC_DIAG_SHUTDOWN,
48 	SMC_DIAG_DMBINFO,
49 	SMC_DIAG_FALLBACK,
50 	__SMC_DIAG_MAX,
51 };
52 
53 #define SMC_DIAG_MAX (__SMC_DIAG_MAX - 1)
54 
55 /* SMC_DIAG_CONNINFO */
56 
57 struct smc_diag_cursor {
58 	__u16	reserved;
59 	__u16	wrap;
60 	__u32	count;
61 };
62 
63 struct smc_diag_conninfo {
64 	__u32			token;		/* unique connection id */
65 	__u32			sndbuf_size;	/* size of send buffer */
66 	__u32			rmbe_size;	/* size of RMB element */
67 	__u32			peer_rmbe_size;	/* size of peer RMB element */
68 	/* local RMB element cursors */
69 	struct smc_diag_cursor	rx_prod;	/* received producer cursor */
70 	struct smc_diag_cursor	rx_cons;	/* received consumer cursor */
71 	/* peer RMB element cursors */
72 	struct smc_diag_cursor	tx_prod;	/* sent producer cursor */
73 	struct smc_diag_cursor	tx_cons;	/* sent consumer cursor */
74 	__u8			rx_prod_flags;	/* received producer flags */
75 	__u8			rx_conn_state_flags; /* recvd connection flags*/
76 	__u8			tx_prod_flags;	/* sent producer flags */
77 	__u8			tx_conn_state_flags; /* sent connection flags*/
78 	/* send buffer cursors */
79 	struct smc_diag_cursor	tx_prep;	/* prepared to be sent cursor */
80 	struct smc_diag_cursor	tx_sent;	/* sent cursor */
81 	struct smc_diag_cursor	tx_fin;		/* confirmed sent cursor */
82 };
83 
84 /* SMC_DIAG_LINKINFO */
85 
86 struct smc_diag_linkinfo {
87 	__u8 link_id;			/* link identifier */
88 	__u8 ibname[IB_DEVICE_NAME_MAX]; /* name of the RDMA device */
89 	__u8 ibport;			/* RDMA device port number */
90 	__u8 gid[40];			/* local GID */
91 	__u8 peer_gid[40];		/* peer GID */
92 };
93 
94 struct smc_diag_lgrinfo {
95 	struct smc_diag_linkinfo	lnk[1];
96 	__u8				role;
97 };
98 
99 struct smc_diag_fallback {
100 	__u32 reason;
101 	__u32 peer_diagnosis;
102 };
103 
104 struct smcd_diag_dmbinfo {		/* SMC-D Socket internals */
105 	__u32		linkid;		/* Link identifier */
106 	__aligned_u64	peer_gid;	/* Peer GID */
107 	__aligned_u64	my_gid;		/* My GID */
108 	__aligned_u64	token;		/* Token of DMB */
109 	__aligned_u64	peer_token;	/* Token of remote DMBE */
110 };
111 
112 #endif /* _UAPI_SMC_DIAG_H_ */
113