1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/include/lnet/ptllnd_wire.h
38 * Author: PJ Kirner <pjkirner@clusterfs.com>
41 /* Minimum buffer size that any peer will post to receive ptllnd messages */
42 #define PTLLND_MIN_BUFFER_SIZE 256
44 /************************************************************************
45 * Tunable defaults that {u,k}lnds/ptllnd should have in common.
48 #define PTLLND_PORTAL 9 /* The same portal PTLPRC used when talking to cray portals */
49 #define PTLLND_PID 9 /* The Portals PID */
50 #define PTLLND_PEERCREDITS 8 /* concurrent sends to 1 peer */
52 /* Default buffer size for kernel ptllnds (guaranteed eager) */
53 #define PTLLND_MAX_KLND_MSG_SIZE 512
55 /* Default buffer size for catamount ptllnds (not guaranteed eager) - large
56 * enough to avoid RDMA for anything sent while control is not in liblustre */
57 #define PTLLND_MAX_ULND_MSG_SIZE 512
60 /************************************************************************
61 * Portals LND Wire message format.
62 * These are sent in sender's byte order (i.e. receiver flips).
65 #define PTL_RESERVED_MATCHBITS 0x100 /* below this value is reserved
66 * above is for bulk data transfer */
67 #define LNET_MSG_MATCHBITS 0 /* the value for the message channel */
71 lnet_hdr_t kptlim_hdr; /* portals header */
72 char kptlim_payload[0]; /* piggy-backed payload */
73 } WIRE_ATTR kptl_immediate_msg_t;
77 lnet_hdr_t kptlrm_hdr; /* portals header */
78 __u64 kptlrm_matchbits; /* matchbits */
79 } WIRE_ATTR kptl_rdma_msg_t;
83 __u64 kptlhm_matchbits; /* matchbits */
84 __u32 kptlhm_max_msg_size; /* max message size */
85 } WIRE_ATTR kptl_hello_msg_t;
89 /* First 2 fields fixed FOR ALL TIME */
90 __u32 ptlm_magic; /* I'm a Portals LND message */
91 __u16 ptlm_version; /* this is my version number */
92 __u8 ptlm_type; /* the message type */
93 __u8 ptlm_credits; /* returned credits */
94 __u32 ptlm_nob; /* # bytes in whole message */
95 __u32 ptlm_cksum; /* checksum (0 == no checksum) */
96 __u64 ptlm_srcnid; /* sender's NID */
97 __u64 ptlm_srcstamp; /* sender's incarnation */
98 __u64 ptlm_dstnid; /* destination's NID */
99 __u64 ptlm_dststamp; /* destination's incarnation */
100 __u32 ptlm_srcpid; /* sender's PID */
101 __u32 ptlm_dstpid; /* destination's PID */
104 kptl_immediate_msg_t immediate;
105 kptl_rdma_msg_t rdma;
106 kptl_hello_msg_t hello;
111 /* kptl_msg_t::ptlm_credits is only a __u8 */
112 #define PTLLND_MSG_MAX_CREDITS ((typeof(((kptl_msg_t*) 0)->ptlm_credits)) -1)
114 #define PTLLND_MSG_MAGIC LNET_PROTO_PTL_MAGIC
115 #define PTLLND_MSG_VERSION 0x04
117 #define PTLLND_RDMA_OK 0x00
118 #define PTLLND_RDMA_FAIL 0x01
120 #define PTLLND_MSG_TYPE_INVALID 0x00
121 #define PTLLND_MSG_TYPE_PUT 0x01
122 #define PTLLND_MSG_TYPE_GET 0x02
123 #define PTLLND_MSG_TYPE_IMMEDIATE 0x03 /* No bulk data xfer*/
124 #define PTLLND_MSG_TYPE_NOOP 0x04
125 #define PTLLND_MSG_TYPE_HELLO 0x05
126 #define PTLLND_MSG_TYPE_NAK 0x06