1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-C 1
2 /*
3 * Copyright (c) 2003-2007 Network Appliance,
4 *
5 * This software is available to you under a c
6 * licenses. You may choose to be licensed un
7 * General Public License (GPL) Version 2, ava
8 * COPYING in the main directory of this sourc
9 * license below:
10 *
11 * Redistribution and use in source and binary
12 * modification, are permitted provided that t
13 * are met:
14 *
15 * Redistributions of source code must re
16 * notice, this list of conditions and th
17 *
18 * Redistributions in binary form must re
19 * copyright notice, this list of conditi
20 * disclaimer in the documentation and/or
21 * with the distribution.
22 *
23 * Neither the name of the Network Applia
24 * its contributors may be used to endors
25 * derived from this software without spe
26 * permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTI
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCH
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIR
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGE
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, S
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE PO
39 */
40
41 #ifndef _LINUX_SUNRPC_XPRTRDMA_H
42 #define _LINUX_SUNRPC_XPRTRDMA_H
43
44 /*
45 * Constants. Max RPC/NFS header is big enough
46 * additional marshaling buffers passed down b
47 *
48 * RDMA header is currently fixed max size, an
49 * fully-chunked NFS message (read chunks are
50 * a single chunk type per message is supporte
51 */
52 #define RPCRDMA_MIN_SLOT_TABLE (4U)
53 #define RPCRDMA_DEF_SLOT_TABLE (128U)
54 #define RPCRDMA_MAX_SLOT_TABLE (16384U)
55
56 #define RPCRDMA_MIN_INLINE (1024) /* min
57 #define RPCRDMA_DEF_INLINE (4096) /* def
58 #define RPCRDMA_MAX_INLINE (65536) /* max
59
60 /* Memory registration strategies, by number.
61 * This is part of a kernel / user space API.
62 enum rpcrdma_memreg {
63 RPCRDMA_BOUNCEBUFFERS = 0,
64 RPCRDMA_REGISTER,
65 RPCRDMA_MEMWINDOWS,
66 RPCRDMA_MEMWINDOWS_ASYNC,
67 RPCRDMA_MTHCAFMR,
68 RPCRDMA_FRWR,
69 RPCRDMA_ALLPHYSICAL,
70 RPCRDMA_LAST
71 };
72
73 #endif /* _LINUX_SUNRPC_XPRTRDMA_H */
74
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