1/*
2 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses.  You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the BSD-type
8 * license below:
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 *      Redistributions of source code must retain the above copyright
15 *      notice, this list of conditions and the following disclaimer.
16 *
17 *      Redistributions in binary form must reproduce the above
18 *      copyright notice, this list of conditions and the following
19 *      disclaimer in the documentation and/or other materials provided
20 *      with the distribution.
21 *
22 *      Neither the name of the Network Appliance, Inc. nor the names of
23 *      its contributors may be used to endorse or promote products
24 *      derived from this software without specific prior written
25 *      permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#ifndef _LINUX_SUNRPC_XPRTRDMA_H
41#define _LINUX_SUNRPC_XPRTRDMA_H
42
43/*
44 * Constants. Max RPC/NFS header is big enough to account for
45 * additional marshaling buffers passed down by Linux client.
46 *
47 * RDMA header is currently fixed max size, and is big enough for a
48 * fully-chunked NFS message (read chunks are the largest). Note only
49 * a single chunk type per message is supported currently.
50 */
51#define RPCRDMA_MIN_SLOT_TABLE	(2U)
52#define RPCRDMA_DEF_SLOT_TABLE	(128U)
53#define RPCRDMA_MAX_SLOT_TABLE	(256U)
54
55#define RPCRDMA_DEF_INLINE  (1024)	/* default inline max */
56
57#define RPCRDMA_INLINE_PAD_THRESH  (512)/* payload threshold to pad (bytes) */
58
59/* Memory registration strategies, by number.
60 * This is part of a kernel / user space API. Do not remove. */
61enum rpcrdma_memreg {
62	RPCRDMA_BOUNCEBUFFERS = 0,
63	RPCRDMA_REGISTER,
64	RPCRDMA_MEMWINDOWS,
65	RPCRDMA_MEMWINDOWS_ASYNC,
66	RPCRDMA_MTHCAFMR,
67	RPCRDMA_FRMR,
68	RPCRDMA_ALLPHYSICAL,
69	RPCRDMA_LAST
70};
71
72#endif /* _LINUX_SUNRPC_XPRTRDMA_H */
73