Viewing: o2iblnd-idl.h
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/* This file is part of Lustre, http://www.lustre.org/
*
* Author: Eric Barton <eric@bartonsoftware.com>
*/
#ifndef __LNET_O2IBLND_IDL_H__
#define __LNET_O2IBLND_IDL_H__
#include <uapi/linux/lnet/lnet-idl.h>
/************************************************************************
* IB Wire message format.
* These are sent in sender's byte order (i.e. receiver flips).
*/
struct kib_connparams {
u16 ibcp_queue_depth;
u16 ibcp_max_frags;
u32 ibcp_max_msg_size;
} __packed;
struct kib_immediate_msg {
struct lnet_hdr_nid4 ibim_hdr; /* portals header */
char ibim_payload[]; /* piggy-backed payload */
} __packed;
struct kib_rdma_frag {
u32 rf_nob; /* # bytes this frag */
u64 rf_addr; /* CAVEAT EMPTOR: misaligned!! */
} __packed;
struct kib_rdma_desc {
u32 rd_key; /* local/remote key */
u32 rd_nfrags; /* # fragments */
struct kib_rdma_frag rd_frags[]; /* buffer frags */
} __packed;
struct kib_putreq_msg {
struct lnet_hdr_nid4 ibprm_hdr; /* portals header */
u64 ibprm_cookie; /* opaque completion cookie */
} __packed;
struct kib_putack_msg {
u64 ibpam_src_cookie;/* reflected completion cookie */
u64 ibpam_dst_cookie;/* opaque completion cookie */
struct kib_rdma_desc ibpam_rd; /* sender's sink buffer */
} __packed;
struct kib_get_msg {
struct lnet_hdr_nid4 ibgm_hdr; /* portals header */
u64 ibgm_cookie; /* opaque completion cookie */
struct kib_rdma_desc ibgm_rd; /* rdma descriptor */
} __packed;
struct kib_completion_msg {
u64 ibcm_cookie; /* opaque completion cookie */
s32 ibcm_status; /* < 0 failure: >= 0 length */
} __packed;
struct kib_msg {
/* First 2 fields fixed FOR ALL TIME */
u32 ibm_magic; /* I'm an ibnal message */
u16 ibm_version; /* this is my version number */
u8 ibm_type; /* msg type */
u8 ibm_credits; /* returned credits */
u32 ibm_nob; /* # bytes in whole message */
u32 ibm_cksum; /* checksum (0 == no checksum) */
u64 ibm_srcnid; /* sender's NID */
u64 ibm_srcstamp; /* sender's incarnation */
u64 ibm_dstnid; /* destination's NID */
u64 ibm_dststamp; /* destination's incarnation */
union {
struct kib_connparams connparams;
struct kib_immediate_msg immediate;
struct kib_putreq_msg putreq;
struct kib_putack_msg putack;
struct kib_get_msg get;
struct kib_completion_msg completion;
} __packed ibm_u;
} __packed;
#define IBLND_MSG_MAGIC LNET_PROTO_IB_MAGIC /* unique magic */
#define IBLND_MSG_VERSION_1 0x11
#define IBLND_MSG_VERSION_2 0x12
#define IBLND_MSG_VERSION IBLND_MSG_VERSION_2
#define IBLND_MSG_CONNREQ 0xc0 /* connection request */
#define IBLND_MSG_CONNACK 0xc1 /* connection acknowledge */
#define IBLND_MSG_NOOP 0xd0 /* nothing (just credits) */
#define IBLND_MSG_IMMEDIATE 0xd1 /* immediate */
#define IBLND_MSG_PUT_REQ 0xd2 /* putreq (src->sink) */
#define IBLND_MSG_PUT_NAK 0xd3 /* completion (sink->src) */
#define IBLND_MSG_PUT_ACK 0xd4 /* putack (sink->src) */
#define IBLND_MSG_PUT_DONE 0xd5 /* completion (src->sink) */
#define IBLND_MSG_GET_REQ 0xd6 /* getreq (sink->src) */
#define IBLND_MSG_GET_DONE 0xd7 /* completion (src->sink: all OK) */
struct kib_rej {
u32 ibr_magic; /* sender's magic */
u16 ibr_version; /* sender's version */
u8 ibr_why; /* reject reason */
u8 ibr_padding; /* padding */
u64 ibr_incarnation;/* incarnation of peer_ni */
struct kib_connparams ibr_cp; /* connection parameters */
} __packed;
/* connection rejection reasons */
#define IBLND_REJECT_CONN_RACE 1 /* You lost connection race */
#define IBLND_REJECT_NO_RESOURCES 2 /* Out of memory/conns etc */
#define IBLND_REJECT_FATAL 3 /* Anything else */
#define IBLND_REJECT_CONN_UNCOMPAT 4 /* incompatible version peer_ni */
#define IBLND_REJECT_CONN_STALE 5 /* stale peer_ni */
/* peer_ni's rdma frags doesn't match mine */
#define IBLND_REJECT_RDMA_FRAGS 6
/* peer_ni's msg queue size doesn't match mine */
#define IBLND_REJECT_MSG_QUEUE_SIZE 7
#define IBLND_REJECT_INVALID_SRV_ID 8
#define IBLND_REJECT_EARLY 9 /* NI not initialized yet */
/***********************************************************************/
#endif /* __LNET_O2IBLND_IDL_H__ */
