4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * lnet/include/lnet/ptllnd_wire.h
36 * Author: PJ Kirner <pjkirner@clusterfs.com>
39 /* Minimum buffer size that any peer will post to receive ptllnd messages */
40 #define PTLLND_MIN_BUFFER_SIZE 256
42 /************************************************************************
43 * Tunable defaults that {u,k}lnds/ptllnd should have in common.
46 #define PTLLND_PORTAL 9 /* The same portal PTLPRC used when talking to cray portals */
47 #define PTLLND_PID 9 /* The Portals PID */
48 #define PTLLND_PEERCREDITS 8 /* concurrent sends to 1 peer */
50 /* Default buffer size for kernel ptllnds (guaranteed eager) */
51 #define PTLLND_MAX_KLND_MSG_SIZE 512
53 /* Default buffer size for catamount ptllnds (not guaranteed eager) - large
54 * enough to avoid RDMA for anything sent while control is not in liblustre */
55 #define PTLLND_MAX_ULND_MSG_SIZE 512
58 /************************************************************************
59 * Portals LND Wire message format.
60 * These are sent in sender's byte order (i.e. receiver flips).
63 #define PTL_RESERVED_MATCHBITS 0x100 /* below this value is reserved
64 * above is for bulk data transfer */
65 #define LNET_MSG_MATCHBITS 0 /* the value for the message channel */
69 lnet_hdr_t kptlim_hdr; /* portals header */
70 char kptlim_payload[0]; /* piggy-backed payload */
71 } WIRE_ATTR kptl_immediate_msg_t;
75 lnet_hdr_t kptlrm_hdr; /* portals header */
76 __u64 kptlrm_matchbits; /* matchbits */
77 } WIRE_ATTR kptl_rdma_msg_t;
81 __u64 kptlhm_matchbits; /* matchbits */
82 __u32 kptlhm_max_msg_size; /* max message size */
83 } WIRE_ATTR kptl_hello_msg_t;
87 /* First 2 fields fixed FOR ALL TIME */
88 __u32 ptlm_magic; /* I'm a Portals LND message */
89 __u16 ptlm_version; /* this is my version number */
90 __u8 ptlm_type; /* the message type */
91 __u8 ptlm_credits; /* returned credits */
92 __u32 ptlm_nob; /* # bytes in whole message */
93 __u32 ptlm_cksum; /* checksum (0 == no checksum) */
94 __u64 ptlm_srcnid; /* sender's NID */
95 __u64 ptlm_srcstamp; /* sender's incarnation */
96 __u64 ptlm_dstnid; /* destination's NID */
97 __u64 ptlm_dststamp; /* destination's incarnation */
98 __u32 ptlm_srcpid; /* sender's PID */
99 __u32 ptlm_dstpid; /* destination's PID */
102 kptl_immediate_msg_t immediate;
103 kptl_rdma_msg_t rdma;
104 kptl_hello_msg_t hello;
109 /* kptl_msg_t::ptlm_credits is only a __u8 */
110 #define PTLLND_MSG_MAX_CREDITS ((typeof(((kptl_msg_t*) 0)->ptlm_credits)) -1)
112 #define PTLLND_MSG_MAGIC LNET_PROTO_PTL_MAGIC
113 #define PTLLND_MSG_VERSION 0x04
115 #define PTLLND_RDMA_OK 0x00
116 #define PTLLND_RDMA_FAIL 0x01
118 #define PTLLND_MSG_TYPE_INVALID 0x00
119 #define PTLLND_MSG_TYPE_PUT 0x01
120 #define PTLLND_MSG_TYPE_GET 0x02
121 #define PTLLND_MSG_TYPE_IMMEDIATE 0x03 /* No bulk data xfer*/
122 #define PTLLND_MSG_TYPE_NOOP 0x04
123 #define PTLLND_MSG_TYPE_HELLO 0x05
124 #define PTLLND_MSG_TYPE_NAK 0x06