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/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lnet/include/lnet/ptllnd_wire.h
*
* Author: PJ Kirner <pjkirner@clusterfs.com>
*/
/* Minimum buffer size that any peer will post to receive ptllnd messages */
#define PTLLND_MIN_BUFFER_SIZE 256
/************************************************************************
* Tunable defaults that {u,k}lnds/ptllnd should have in common.
*/
#define PTLLND_PORTAL 9 /* The same portal PTLPRC used when talking to cray portals */
#define PTLLND_PID 9 /* The Portals PID */
#define PTLLND_PEERCREDITS 8 /* concurrent sends to 1 peer */
/* Default buffer size for kernel ptllnds (guaranteed eager) */
#define PTLLND_MAX_KLND_MSG_SIZE 512
/* Default buffer size for catamount ptllnds (not guaranteed eager) - large
* enough to avoid RDMA for anything sent while control is not in liblustre */
#define PTLLND_MAX_ULND_MSG_SIZE 512
/************************************************************************
* Portals LND Wire message format.
* These are sent in sender's byte order (i.e. receiver flips).
*/
#define PTL_RESERVED_MATCHBITS 0x100 /* below this value is reserved
* above is for bulk data transfer */
#define LNET_MSG_MATCHBITS 0 /* the value for the message channel */
typedef struct
{
lnet_hdr_t kptlim_hdr; /* portals header */
char kptlim_payload[0]; /* piggy-backed payload */
} WIRE_ATTR kptl_immediate_msg_t;
typedef struct
{
lnet_hdr_t kptlrm_hdr; /* portals header */
__u64 kptlrm_matchbits; /* matchbits */
} WIRE_ATTR kptl_rdma_msg_t;
typedef struct
{
__u64 kptlhm_matchbits; /* matchbits */
__u32 kptlhm_max_msg_size; /* max message size */
} WIRE_ATTR kptl_hello_msg_t;
typedef struct
{
/* First 2 fields fixed FOR ALL TIME */
__u32 ptlm_magic; /* I'm a Portals LND message */
__u16 ptlm_version; /* this is my version number */
__u8 ptlm_type; /* the message type */
__u8 ptlm_credits; /* returned credits */
__u32 ptlm_nob; /* # bytes in whole message */
__u32 ptlm_cksum; /* checksum (0 == no checksum) */
__u64 ptlm_srcnid; /* sender's NID */
__u64 ptlm_srcstamp; /* sender's incarnation */
__u64 ptlm_dstnid; /* destination's NID */
__u64 ptlm_dststamp; /* destination's incarnation */
__u32 ptlm_srcpid; /* sender's PID */
__u32 ptlm_dstpid; /* destination's PID */
union {
kptl_immediate_msg_t immediate;
kptl_rdma_msg_t rdma;
kptl_hello_msg_t hello;
} WIRE_ATTR ptlm_u;
} kptl_msg_t;
/* kptl_msg_t::ptlm_credits is only a __u8 */
#define PTLLND_MSG_MAX_CREDITS ((typeof(((kptl_msg_t*) 0)->ptlm_credits)) -1)
#define PTLLND_MSG_MAGIC LNET_PROTO_PTL_MAGIC
#define PTLLND_MSG_VERSION 0x04
#define PTLLND_RDMA_OK 0x00
#define PTLLND_RDMA_FAIL 0x01
#define PTLLND_MSG_TYPE_INVALID 0x00
#define PTLLND_MSG_TYPE_PUT 0x01
#define PTLLND_MSG_TYPE_GET 0x02
#define PTLLND_MSG_TYPE_IMMEDIATE 0x03 /* No bulk data xfer*/
#define PTLLND_MSG_TYPE_NOOP 0x04
#define PTLLND_MSG_TYPE_HELLO 0x05
#define PTLLND_MSG_TYPE_NAK 0x06
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